WO2017067082A1 - Ventilation control apparatus, and breathing mask device provided with ventilation control apparatus - Google Patents

Abstract

A breathing mask (110, 20) provided with a ventilation control apparatus (200, 300), the ventilation control apparatus (200, 300) comprising: a cavity (210, 310, 410, 510, 610, 710) provided with one or a plurality of air delivery ports (212A, 212B, 312A, 312B, 412, 512, 612, 712A, 712B) and a mask ventilation port (211), the air delivery ports (212A, 212B, 312A, 312B, 412, 512, 612, 712A, 712B) being in communication with the mask ventilation port (211), the mask ventilation port (211) being used for being in communication with the breathing mask (110, 20); a valve assembly (420, 520, 620) arranged at at least one of the air delivery ports (212A, 212B, 312A, 312B, 412, 512, 612, 712A, 712B), the valve assembly (420, 520, 620) being configured to keep the pressure within the cavity (210, 310, 410, 510, 610, 710) greater than the atmospheric pressure during exhalation; silencing apparatuses (240, 340A, 340B, 440, 540, 640, 740) comprising a plurality of silencing holes (241, 341A, 341B, 441, 541, 741), the plurality of silencing holes (241, 341A, 341B, 441, 541, 741) being in communication with at least one of the air delivery ports (212A, 212B, 312A, 312B, 412, 512, 612, 712A, 712B), so that air enters an air delivery port (212A, 312A, 712A) via the plurality of silencing holes (241, 341A, 341B, 441, 541, 741) and/or air discharged from an air delivery port (212B, 312B, 412, 512, 612, 712B) is discharged via the plurality of silencing holes (241, 341A, 341B, 441, 541, 741). The ventilation control apparatus (200, 300) implements an exhalation phase positive pressure function, and prevents patient discomfort caused by continuous positive pressure. A positive pressure air supply apparatus (130) and a pipeline (120) etc. need not be connected during use, thereby facilitating patient movement, and the positive pressure air supply apparatus (130) need not be carried when going out. In addition, the ventilation control apparatus (200, 300) is small in size, convenient to carry, and low in cost.

Description

Ventilation control device and respiratory mask device having the same

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. CN201510698558.6, filed on Oct. 23, 2015, which is hereby incorporated hereinby In this article.

Technical field

The present invention relates to the field of respiratory masks, and in particular to a ventilation control device for a respiratory mask and a respiratory mask device having such a ventilation control device.

Background technique

Current methods for treating obstructive sleep apnea hypopnea syndrome (OSAHS) include surgery, orthodontics, continuous positive airway pressure (CPAP), and positive end-expiratory pressure (PEEP).

The most common method of surgery is uvulopalatopharyngoplasty and its improved surgery for upper airway oropharyngeal obstruction (including pharyngeal mucosal tissue hypertrophy, narrow pharyngeal cavity, uvula sulcus hypertrophy, soft palate too low, tonsil hypertrophy And apnea hypopnea index (AHI) <20 times / hour. Due to the need for surgery, the patient's acceptance is low, and the length of the surgical tissue may cause the disease to be repeated, and then the surgery cannot be performed again.

Oral orthoses are often used in patients with simple snoring and mild OSAHS (AHI <15 times / hour), especially in patients with mandibular retraction. The efficacy is unpredictable and can only be used.

The continuous positive pressure ventilation technique is to connect the respiratory mask 110 to the CPAP ventilator 130 through the connecting line 120 and wear the respiratory mask 110 to the face of the patient. The CPAP ventilator 130 produces a continuous positive pressure flow that provides physiological pressure support to the patient's upper airway to treat the OSAHS. The disadvantage of continuous positive pressure ventilation is that continuous positive pressure can cause discomfort to the patient, and some patients cannot accept it; the connecting line and the ventilator limit the night activity of the patient, and the compliance is low; the CPAP ventilator is inconvenient to carry and the cost is high. Breathing masks are used in a number of different situations for the treatment of respiratory disorders, such as the treatment of obstructive sleep apnea syndrome; or in other cases for providing a stable flow of breathables.

Accordingly, there is a need for a ventilation control device for a respiratory mask and a respiratory mask apparatus having the ventilation control device to at least partially address the above mentioned problems.

Summary of the invention

In order to at least partially solve the problems in the prior art, the present invention provides a ventilation control device for a respiratory mask and a respiratory mask device having the same.

A ventilation control apparatus for a respiratory mask according to an aspect of the present invention includes: a cavity having a mask vent and one or more air outlets, the air inlet communicating with the mask vent, The mask vent is for communicating with the breathing mask; the valve assembly is disposed at at least one of the air ports, the valve assembly is configured to maintain a pressure in the chamber greater than atmospheric pressure when exhaling; and a muffling device Included in the plurality of muffling holes, the plurality of muffling holes are in communication with at least one of the gas delivery ports to allow gas to enter the gas delivery port via the plurality of muffle holes, and/or to be discharged from the gas delivery port The gas is discharged through the plurality of silencing holes.

Preferably, the plurality of silencing holes have a minimum diameter of less than or equal to 3 mm, and/or the plurality of silencing holes have a pitch of 1.5-7 mm.

Preferably, the central axes of the plurality of silencing holes are radially distributed along the exhaust direction of the gas ports communicating with them.

Preferably, when the plurality of silencing holes are connected to an air inlet for intake or for exhaust, the plurality of silencing holes are tapered along a direction of the airflow; when the plurality of silencing holes are connected to both When the intake port is used for the intake and the exhaust port, the plurality of muffle holes are tapered along the exhaust direction.

Preferably, the ventilation control device further includes a damper mechanism that forms a damper chamber with the movable member during exhalation in the valve assembly, the damper mechanism is opposite to the venting mechanism during exhalation The cavity is fixedly disposed, and the shock absorbing cavity has a shock absorbing vent.

Preferably, the ventilation control device further includes a damping damping mechanism fixedly disposed with respect to the cavity when exhaling, the damping damping mechanism being an exhalation in the valve assembly The movable part of the time provides frictional resistance.

Preferably, the valve assembly has an intake passage and an exhaust passage, the intake passage and the exhaust passage being in communication with the cavity through the gas delivery port, wherein the valve assembly is configured to be The intake passage is turned on when the pressure in the chamber is less than or equal to atmospheric pressure; and the exhaust passage is turned on when the difference between the pressure in the chamber and the atmospheric pressure is greater than or equal to a predetermined value, wherein the noise reduction device Connected to the intake air The inlet of the passage and/or the outlet of the exhaust passage.

Preferably, the valve assembly includes: a first valve mechanism having a first closed position that closes the gas delivery port and a first open position that opens the gas delivery port, and the first valve mechanism is provided with a through hole The first valve mechanism includes the movable member; and a second valve mechanism disposed at the through hole, having a second closed position to close the through hole and a second open to open the through hole position.

Preferably, the valve assembly includes a valve seat connected to the gas delivery port, the valve seat is provided with an air outlet, the first valve mechanism is disposed in the valve seat and includes: a first valve core The through hole is disposed on the first valve core, the first valve core is the movable component; the first biasing member is abutted against the first valve core to give the first The spool provides a resistance to movement from the first closed position to the first open position.

Preferably, the gas delivery port includes an intake port and an exhaust port, and the valve assembly includes: an intake valve disposed at the intake port, the intake valve being configured to be inside the cavity Opening when the pressure is less than or equal to atmospheric pressure; and an exhaust valve disposed at the exhaust port, the exhaust valve being configured to open when a difference between the pressure in the chamber and the atmospheric pressure is greater than or equal to a predetermined value, wherein The noise reduction device is disposed at the air inlet and/or the air outlet.

Preferably, the exhaust valve includes: a valve seat connected to the exhaust port; an exhaust valve core having a closed position closing the exhaust port and an open position opening the exhaust port, An exhaust valve spool is the movable member; and an exhaust valve biasing member abutting against the exhaust valve spool to provide movement of the exhaust valve spool from the closed position to the open position resistance.

Preferably, the valve assembly includes an adjustment mechanism for adjusting the predetermined value.

Preferably, the valve assembly includes an adjustment mechanism for adjusting the predetermined value, the adjustment mechanism including: a valve cover movably coupled to the valve seat, the first biasing member or the row a gas valve biasing member correspondingly abutting between the first valve core and the valve cover or between the exhaust valve core and the valve cover; and a positioning structure for positioning relative to the valve seat The position of the bonnet, wherein the muffling device is disposed on the bonnet.

Preferably, the valve assembly cooperates with the air inlet to form an air inlet and an air outlet; the valve assembly is configured to cause the air inlet and the air when the pressure in the cavity is less than or equal to atmospheric pressure The mask vent is connected, and the exhaust port is in communication with the mask vent when the pressure in the chamber is greater than atmospheric pressure, wherein a cross-sectional area of the air inlet is greater than a cross-section of the air outlet The area, and the venting port is capable of maintaining a pressure in the chamber greater than atmospheric pressure when exhaling.

Preferably, the gas delivery port includes a first gas delivery port and a second gas delivery port which are disposed at intervals, and the valve assembly is disposed at the first gas delivery port; when the pressure in the cavity is less than or equal to atmospheric pressure Opening the first air inlet, the first air inlet and the second air outlet are the air inlet; when the pressure in the chamber is greater than atmospheric pressure, the first air outlet is closed, The second air outlet is the exhaust port, and the noise reduction device is disposed at the first air inlet and/or the second air inlet.

Preferably, the second air inlet is formed by a plurality of silencing holes of the muffling device.

Preferably, the valve assembly includes an adjustment mechanism for adjusting a ventilation area of the second gas delivery port.

Preferably, the adjustment mechanism includes: a fixing member connected to the cavity at the second air delivery port; a movable member movably connected to the fixing member, the noise reduction device being disposed at On the movable member, the second air inlet communicates with the atmosphere via the plurality of silencing holes of the muffling device; and a positioning structure for positioning the movable member relative to the fixing member And an adjusting member, the head of the adjusting member being disposed to be accommodated in the second air inlet and having a different cross-sectional area along a gas flow direction of the second air inlet, the adjusting member being connected To the movable member, the movable member is capable of driving the adjusting member to move along a gas flow direction of the second gas delivery port.

Preferably, the valve assembly includes: an elastic valve flap having a closed position for closing the gas delivery opening and an opening position for opening the gas delivery opening, wherein the elastic valve flap is provided with a through hole, and the through hole is The exhaust port; and the elastic valve port, the elastic valve port is connected to the through hole on an outer side of the cavity, and the elastic valve port is tapered along an exhaust direction of the through hole.

A respiratory mask apparatus according to another aspect of the present invention includes: a respiratory mask; and any ventilation control device as described above, the ventilation control device being coupled to the respiratory mask and passing through the mask vent The breathing mask is vented.

When the patient exhales, the pressure inside the breathing mask will be higher than atmospheric pressure. The invention utilizes the characteristics of expiratory air pressure change to provide a ventilation control device capable of realizing positive expiratory pressure, avoiding patient discomfort caused by continuous positive pressure; without using a positive pressure gas supply device (such as a CPAP ventilator) and The pipeline is convenient for the patient to move; when the patient is out, there is no need to carry the positive pressure gas supply device, and the patient can wear the respiratory mask with the ventilation control device for treatment at any time. In addition, the ventilation control device also increases the noise reduction device by using the principle of small hole injection silencer to reduce the noise generated by the ventilation control device during use; since the noise reduction device is small in size, it does not affect the compact design of the ventilation control device; When the muffler is connected to the gas outlet for discharging the gas, the gas discharged through the muffler hole is relatively divergent, so that the discharged gas can be prevented from being blown. Noise is generated to the obstacles, and the discomfort that is blown to the human body can be alleviated. Further, the ventilation control device is small in size, convenient to carry, and low in cost.

A series of simplified forms of concepts are introduced in the Summary of the Invention, which will be described in further detail in the Detailed Description section. The summary is not intended to limit the key features and essential technical features of the claimed invention, and is not intended to limit the scope of protection of the claimed embodiments.

Advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

DRAWINGS

The following drawings of the invention are hereby incorporated by reference in their entirety in their entirety. The embodiments of the invention and the description thereof are shown in the drawings In the drawing,

Figure 1 is a schematic view of a conventional continuous positive pressure ventilation system;

2A is a perspective view of a respiratory mask having a ventilation control device in accordance with one embodiment of the present invention;

Figure 2B is a full cross-sectional view of the ventilation control device and the respiratory mask of Figure 2A;

Figure 3A is a cross-sectional view of a respiratory mask having a ventilation control device in accordance with a first embodiment of the present invention;

Figure 3B is a cross-sectional view of a respiratory mask having a ventilation control device in accordance with a second embodiment of the present invention;

Figure 3C is an enlarged view of the muffling device 341B of Figure 3B;

4A is a cross-sectional view of a respiratory mask having a ventilation control device in accordance with a third embodiment of the present invention;

Figure 4B is a cross-sectional view of a ventilation control device in accordance with a fourth embodiment of the present invention;

Figure 5 is a cross-sectional view of a respiratory mask having a ventilation control device in accordance with a fifth embodiment of the present invention;

Figure 6 is a cross-sectional view of a respiratory mask having a ventilation control device in accordance with a sixth embodiment of the present invention;

Figure 7 is a cross-sectional view of a respiratory mask having a ventilation control device in accordance with a seventh embodiment of the present invention.

110, breathing mask; 120, connecting pipeline; 130, CPAP ventilator; 20, breathing mask; 21, mask body; 22, pad assembly; 23, support portion; 24, forehead support; 200, ventilation control device; 210, cavity; 211, mask vent; 212A, first air outlet; 212B, second air outlet; 213, connection structure; 220, intake valve; 221, connecting member; 230, exhaust valve; , valve seat; 232, exhaust valve core; 233, exhaust valve biasing member; 234, air outlet; 240, silencer; 241, silencer hole; 250, shock absorption mechanism; 251, shock absorption cavity; Shock vent; 260, adjustment mechanism; 261, bonnet; 300, Ventilation control device; 310, cavity; 312A, first gas delivery port; 312B, second gas delivery port; 320, intake valve; 340A, 340B, muffler device; 341A, 341B, muffler hole; 410, cavity; 412, gas outlet; 420, valve assembly; 421, valve seat; 421A, limit groove; 422, first valve mechanism; 422A, first valve core; 422B, through hole; 422C, first biasing member; , protrusions; 422E, air holes; 423, second valve mechanism; 440, silencer; 441, silencer hole; 450, 450', shock absorption mechanism; 451, 451', shock absorption cavity; 452, shock absorption vent; 460, adjusting mechanism; 461, valve cover; 510, cavity; 512, gas outlet; 520, valve assembly; 521, first valve mechanism; 521A, first valve core; 521B, first biasing member; a second valve mechanism; 522A, a second valve core; 522B, a second biasing member; 523, a through hole; 540, a muffler device; 541, a muffler hole; 560, a damping shock absorbing mechanism; 610, a cavity; Air port; 620, valve assembly; 621, elastic valve flap; 622, connecting member; 623, through hole; 640, silencer; 624, elastic valve; 710, cavity; 712A, a gas outlet; 712B, second gas outlet; 770, adjustment mechanism; 771, fixing member; 772, movable member; 773, positioning structure; 774, adjusting member; 774A, head; 740, muffler; , silencer hole.

detailed description

In the following description, numerous details are provided in order to provide a thorough understanding of the invention. However, those skilled in the art can understand that the following description is merely illustrative of a preferred embodiment of the invention, which may be practiced without one or more such details. Moreover, in order to avoid confusion with the present invention, some of the technical features well known in the art are not described in detail.

According to an aspect of the invention, a ventilation control device (hereinafter referred to as a ventilation control device) for a respiratory mask is provided. In order to be able to accurately and completely understand the ventilation control device, a breathing mask using the ventilation control device will be briefly described herein. It will be understood that the nasal mask type breathing mask shown in the drawings is merely exemplary, and the ventilation control device provided herein is not limited to being applied only to the nasal mask type breathing mask, which can also be applied to the nose. Breathing mask in the form of a hood, full face mask or nasal plug.

As shown in the perspective view of FIG. 2A and the cross-sectional view of FIG. 2B, the respiratory mask 20 includes a mask body 21, a cushion assembly 22, and a forehead support 24. In other embodiments not shown, the respiratory mask 20 may not include one or both of the components, such as not including the forehead support 24.

A mask through hole (not shown) is provided on the mask body 21. The pad assembly 22 is mounted on the mask body 21. The mask body 21 and the cushion assembly 22 together form a cavity. The cushion assembly 22 can be fixedly or detachably coupled to the mask body 21. The gasket assembly 22 can also form the cavity separately, and is implemented herein. The mask body 21 can support the cushion assembly 22 outside of the cushion assembly 22 in the example. In use, the mask body 21 and pad assembly 22 will contact the patient's face (including the cheeks, bridge of the nose, upper and lower mouth, etc.) to form a seal to allow the cavity to communicate with the patient's nasal or nasal cavity. The mask body 21 may be made of a rigid material or a flexible material. The cushion assembly 22 is preferably made of a flexible material. The cushion assembly 22 can be an air bag or a membrane structure. The membrane structure can be a single layer or a separate bilayer. The cushion assembly 22 can also include adhesives (e.g., stickers, etc.) to enhance patient feel and sealing. The shape of the mask body 21 and the cushion assembly 22 as viewed from the front is not limited to the general triangular shape shown in the drawing, but may be a pear shape, a trapezoid shape or the like. The mask body 21 and the pad assembly 22 may also take a shape that matches the shape of the nose and the like. In a nasal-plug type respiratory mask, the cushion assembly 22 can also be designed as a conical film-shaped nasal plug that is sealed from the nasal orifice, and the structure can also have a single layer or a separate two-layer membrane structure. In the nose and mouth breathing mask, the nasal plug can also be combined with the mouth mask design. The cushion assembly 22 includes a support portion 23. The support portion 23 can be designed with wrinkles, bellows, partial thinning, bending, curved, etc. to achieve a better fit of the respiratory mask 20 to the face, and even to achieve the cushion portion and mask of the cushion assembly 22. The main body 21 is suspended so that the angle of fit of the pad to the face can be adapted and the gas pressure in the cavity is used to assist the sealing. As an example, the support portion employs a balloon or gel and can have an adaptive face function.

In addition, the respiratory mask 20 also includes fasteners for attaching the securing assembly, such as snaps, strap loops, and the like. The fixing member may be attached to the mask body 21 as a separate component or may be integrally formed with the mask body 21. The fixation assembly is used to secure the respiratory mask 20 in place on the patient's face, which may be a variety of existing headbands. The headband may have a structure that is connected to the mask body 21, such as a buckle and a Velcro strap. The material of the headband may be a braid, an elastomer or the like (wherein the elastomer may be foam, silica gel, etc.), or a multilayer structure in which the braid and the elastomer are composited to improve elasticity, gas permeability and human compliance. The shape of the headband can be made into various shapes such as a Y-shape, an I-shape, and the like, and parts which are relatively rigid in some directions and flexible in some other directions can be added to better fix the respiratory mask 20. The fixation component may also be a structure that is directly attached to the face, the outside of the nose, or the nasal cavity, such as a fixed structure that may be an adhesive member (eg, a sticker, etc.).

The forehead support 24 abuts against the patient's forehead when in use. The connection between the forehead support 24 and the mask body 21 can be fixed or detachable, and the split embodiment is, for example, snap-fit. The forehead support 24 includes a soft forehead contact. The forehead support 24 can also have adjustment means to adjust the distance from the forehead to ensure adaptation to different facial shapes.

The above rigid material may be plastic, alloy, etc., and the flexible material may be silica gel, gel, foam, gas. For capsules, textiles, etc., this material definition also applies to subsequent parts.

The various components included in the respiratory mask 20 can be constructed in a manner known in the art and therefore will not be described in further detail herein.

DETAILED DESCRIPTION OF THE INVENTION A plurality of preferred embodiments of the ventilation control device provided by the present invention will be described in detail below with reference to the accompanying drawings. 2A-2B, the vent control device 200 includes a cavity 210, a valve assembly (including an intake valve 220 and an exhaust valve 230), and a muffling device 240.

The cavity 210 has a mask vent 211 and one or more gas ports. In the embodiment of Figures 2A-2B, the cavity 210 has a first gas delivery port 212A and a second gas delivery port 212B. The air inlet is in communication with the mask vent 211. The mask vent 211 is for communicating with the respiratory mask 20. The mask vent 211 is, for example, connected to the mask through hole of the respiratory mask 20. Although the cavity 210 is generally cylindrical in shape, in other embodiments not shown, the cavity 210 may have any other shape as long as a sealed space that can be vented with the respiratory mask 20 can be formed. can. The volume of the cavity 210 is not limited, and it is preferable to wear comfort. The cavity 210 can be made of a flexible material or a rigid material. The cavity 210 can be non-detachably coupled to the respiratory mask 20 such that the ventilation control device 200 is non-detachably coupled to the respiratory mask 20. The cavity 210 may even be integral with the cavity formed by the mask body 21 and the cushion assembly 22, such as by molding the cavity 210 integrally with the mask body 21. As an example, the cavity 210 and the cavity can be formed as two cavities that can be clearly distinguished and communicated. As an example, the cavity 210 can also be formed as part of a cavity, that is, for the embodiment shown in Figures 2A-2B, a portion of the cavity of the respiratory mask 20 can be utilized as the cavity 210 to deliver the first gas. The port 212A and the second air port 212B are formed directly on the mask body 21. Thus, the valve assembly (including the intake valve 220 and the exhaust valve 230) can be disposed directly on the mask body 21. In other embodiments, a connection structure 213 can be provided at the mask vent 211 of the cavity 210. The connection structure 213 is for detachably connecting the ventilation control device 200 to the respiratory mask 20. The connecting structure 213 can be, for example, a snap connection device, a screw connection device or an elastic body fastening connection device or the like. In this way, the ventilation control device 200 can be replaced at any time, and the ventilation control device 200 can be designed to be directly applied to an existing CPAP breathing mask to reduce the cost of use of the patient.

The gas delivery ports (eg, the first gas delivery port 212A and the second gas delivery port 212B) are used for gas exchange between the cavity 210 and the atmosphere, including the patient's inhalation and the patient's exhalation, both through the gas delivery port. carry out. In the embodiment of Figures 2A-2B, two gas ports are provided in the chamber 210. Among them, the first air inlet 212A serves as an air inlet and the second air outlet 212B serves as an air outlet. In other embodiments not shown, the number of gas outlets may be one or more. The valve assembly can be disposed at at least one gas outlet. Through the valve assembly and The cooperation of the gas delivery ports may allow all or part of the gas delivery ports to serve as both an air inlet and an exhaust port, or one or more of the air ports may be used as an air inlet and the rest may be used as exhaust vent. An embodiment of setting one or more gas outlets will also be described later. The valve assembly can act as a valve to control the flow of gas throughout the gas delivery ports. The valve assembly can also control the flow of gas to a portion of the gas delivery port, such as when the valve assembly is closed, another portion of the gas delivery port can be vented. When there are multiple gas outlets, the valve assembly can be combined in the two ways described above.

The valve assembly is configured to maintain the chamber pressure P in the expiratory ₂₁₀₁ greater than atmospheric pressure P _0. In the embodiment of Figures 2A-2B, the valve assembly can include an intake valve 220 disposed at the first air inlet 212A (i.e., the intake port) and a second air port 212B (i.e., the exhaust port). Exhaust valve 230. When the pressure P _{1 in the} cavity 210 is less than or equal to the atmospheric pressure P ₀ , the intake valve 220 can be opened, and the gas enters the cavity 210 from the first gas delivery port 212A. When the pressure P _{1 in the} cavity 210 is greater than the atmospheric pressure P ₀ , the intake valve 220 can be closed, and the exhaust valve 230 can be opened under certain conditions. For example, when the difference between the pressure P ₁ and the atmospheric pressure P ₀ in the cavity 210 is greater than a predetermined value, the gas is discharged from the second gas delivery port 212B. This maintains the pressure P ₁ within the cavity 210 greater than the atmospheric pressure P ₀ . Further, as shown in FIG. 3A, it is also possible to set the opening area of the second gas delivery port 312B to be small so that the gas discharge rate is smaller than the patient's expiratory rate to form a positive pressure environment during exhalation. Intake valve 320 may be the same or similar to intake valve 220 of FIG. When inhaling, the second air inlet 312B can also function as an auxiliary air intake. In this way, it is possible to achieve no resistance or small resistance when inhaling. The results of related pathological studies showed that patients with OSAHS had no obstruction of the airway during inhalation and only had obstruction during exhalation. The invention adopts positive expiratory pressure to prevent the upper airway from collapsing, thereby further treating the OSAHS. Several preferred embodiments of the valve assembly will be described in detail hereinafter.

Referring back to Figures 2A-2B, the muffling device 240 includes a plurality of muffler holes 241. The principle of small hole injection silencer is used to convert the high frequency sound into the ultrasonic range which is not sensitive to the adult ear, thereby achieving the purpose of noise reduction. The muffling device 240 may be disposed at at least one of the air ports. As the muffling device 240, it may be connected to at least one gas outlet at the outside of the cavity 210. A muffling device 240 may be attached to the outside of the second gas delivery port 212B and the exhaust valve 230 for exhausting gas, as shown in Figs. 2A-2B. The gas generated by the exhalation can be discharged into the air through the plurality of spaced silencers 241 after being discharged from the second air outlet 212B, thereby reducing the noise generated by the collision when the gas is discharged. Of course, it is also possible to add a muffling device similar to the muffling device 240 to the outside of the first air inlet 212A and the intake valve 220 for intake air (i.e., the side away from the cavity 210). The muffling device 240 is provided with a plurality of muffling holes for allowing gas to enter the gas delivery port 214A via the plurality of muffling holes. It has been verified that the addition of a muffler at the air inlet for the intake air also improves the noise, mainly to reduce the flow of air. The noise of the first air inlet 212A and the intake valve 220. An embodiment in which a sound absorbing device is attached to an air inlet for intake air will be described later with reference to FIG. 3B. The noise generated by the ventilation control device during use can be reduced by installing the above-described muffling device. When the noise absorbing device is connected to the second gas delivery port 212B for discharging the gas, the gas discharged through the sound absorbing hole 241 is relatively divergent, so that the noise generated by the discharged gas to the obstacle can be prevented, and the discomfort blown to the human body can be alleviated. sense.

For the embodiment shown in FIG. 3A, the muffling device may be directly mounted outside the first gas delivery port 312A and/or outside the second gas delivery port 312B, allowing gas to enter the first gas delivery port 312A via the muffler device, and / or discharge the gas discharged from the first gas delivery port 312A via the muffler. Although the muffling device is not shown in FIG. 3A, such a structure can be understood by those of ordinary skill in the art based on the above description and the drawings.

In a preferred embodiment, as shown in FIG. 3B, the muffling device 340B disposed at the second air port 312B for exhausting may be used to achieve positive expiratory pressure. The muffling device 340B may be located in the second gas delivery port 312B. It can be understood that the second air inlet 312B shown in Fig. 3A is replaced with the sound absorbing hole 341B of the sound absorbing device 340B. The muffling hole 341B of the muffler device 340B functions to limit the discharge rate of the gas. That is, the size of the silencing hole 341B is set such that the pressure P _{0 in the} cavity 310 is maintained larger than the atmospheric pressure P ₁ when exhaling. The muffler 340A at the first gas delivery port 312A for intake air is shown mounted on the outside of the intake valve as shown in FIG. 3B. However, the muffling device 340A may also be mounted in the first gas delivery port 312A similarly to the muffler device 340B.

The volume of the sound reduction of the small hole jet is related to the diameter of the sound absorbing hole. Studies have shown that the smaller the diameter of the silencing hole, the greater the volume. Preferably, the minimum diameter of the plurality of silencing holes may be set to be less than or equal to 3 mm. Further preferably, the minimum diameter of the plurality of silencing holes is set to be less than or equal to 1.5 mm. When the diameter of the silencing hole is less than or equal to 1 mm, the aperture is reduced by half to reduce the noise by 9 dB. Therefore, it is still further preferred that the minimum diameter of the plurality of silencing holes is set to be less than or equal to 1 mm. In addition, the smaller the pitch of the holes between the plurality of silencing holes, the more the airflow passes through the plurality of silencing holes, and then merges into a large spray column, resulting in a worsening of the muffling effect. Preferably, the plurality of silencing holes have a hole pitch in the range of 1.5-7 mm. Further preferably, the plurality of silencing holes have a hole pitch in the range of 1.5 to 5 mm. Still more preferably, the plurality of silencing holes have a hole pitch in the range of 2-4 mm. In the embodiment in which the muffling device is provided at the air inlet for the intake air, in order to ventilate smoothly, and considering the damping effect of the muffling hole, preferably, the flow cross-sectional area of the plurality of muffling holes is greater than or equal to that for the intake air. The gas transmission port has a cross-sectional area of 1.2 times.

Preferably, referring to an enlarged view of the muffling device 340B shown in FIG. 3C, the central axes P-P of the plurality of muffling holes 341B are radially distributed along the exhaust direction of the air ports through which they communicate. In Figures 2A-2B and In the embodiment shown in 3B-3C, the plurality of silencing holes 241, 341B are connected to the second air outlets 212B, 312B for exhausting, and the central axes of the plurality of silencing holes 241, 341B may be along the second gas transmission The exhaust directions of the ports 212B and 312B are radially distributed. For the sound absorbing hole that is connected to the gas supply port for exhaust gas (the embodiment will be described later), the central axis thereof may be radially distributed along the exhaust direction of the gas delivery port. For the air inlet which serves as both the air inlet and the air outlet, the sound absorbing holes on the noise damper connected thereto are preferably radially distributed along the exhaust direction. In this way, the chance of the air jets ejected by the muffling holes being ejected to each other can be reduced to further reduce the noise.

Preferably, with continued reference to FIG. 3C, the plurality of silencing holes 341B are tapered in the direction of the airflow, that is, the size of the gas inlet end of the silencing hole 341B is larger than the size of the gas outlet end thereof. Referring to the embodiment shown in FIGS. 2A-2B and 3B-3C, a plurality of silencing holes 241, 341B are communicated to the second gas delivery ports 212B, 312B for exhaust gas, and the muffler holes 241, 341B are gradually formed along the exhaust direction. Shrink. For the sound absorbing hole 341A connected to the air inlet as the air inlet, referring to Fig. 3B, the sound absorbing hole 341A is tapered in the air intake direction. Further, for an air inlet which serves as both an intake port and an exhaust port (hereinafter, an embodiment will be described), the muffling hole connected thereto is preferably tapered in the exhaust direction. In this way, the airflow ejected from each of the silencing holes can be separately collected, and the chance that the ejected airflow is mutually ejected outside the muffler device can be reduced to further reduce the noise.

Preferably, the muffling device 240, 340A, 340B is detachably coupled to at least a portion of the air delivery port to facilitate cleaning and replacement of the muffler device.

Preferably, the muffling devices 240, 340A, 340B are made of a hydrophobic material to prevent water vapor liquefaction from adsorbing into the silencing hole to form a water film and affecting the ventilation. In addition, the sound absorbing device made of a hydrophobic material is convenient for cleaning. As an example, the hydrophobic material may be polyvinylidene fluoride (PVDF), polyurethane (PUR), polyester (PES), polylactic acid (PLA), polycaprolactone (PCL), polypropylene (PP), polyester. One or more of (PES) and polycarbonate (PC).

In a preferred embodiment, referring back to Figures 2A-2B, the intake valve 220 can be made of an elastomeric material or a morphological memory material and connected within the cavity 210 at the first gas delivery port 212A, such as directly connected to the cavity. The wall of the body 210 is attached to the cavity 210 by an intermediate member, such as the connector 221 of FIG. The intake valve 220 can be opened in one direction, that is, when the pressure P _{1 in the} cavity 210 is less than or equal to the atmospheric pressure P ₀ , the intake valve 220 is opened to the inside of the cavity 210, and the air enters the cavity 210 through the first gas delivery port 212A. Inside. Of course, the intake valve may have other arrangements as long as the first air port 212A can be opened when the pressure P ₁ in the cavity 210 is less than or equal to the atmospheric pressure P ₀ . The seal between the intake valve 220 and the first gas delivery port 212A can take various forms of design, and the sealing fit between the intake valve 220 and the first gas delivery port 212A includes line and plane fit, planar and planar fit, Line and cylindrical face fit, cylindrical and cylindrical fit, line and spherical fit, spherical and spherical fit, line and conical fit, conical and conical fit, etc. The material of the sealing mating part can be a flexible combination of rigidity and flexibility. The shape and material of the above-mentioned seal fitting portion can also be applied to various valves as described below. In one embodiment, the exhaust valve 230 may take a structure similar to the intake valve 220.

In another embodiment, the exhaust valve 230 may include an exhaust spool 232 and an exhaust valve biasing member 233. The exhaust valve spool 232 has a closed position in which the second air inlet 212B for exhausting is closed and an open position in which the second air inlet 212B is opened. The exhaust valve 230 may also include a valve seat 231. The valve seat 231 is connected to the second gas delivery port 212B, and the valve seat 231 is provided with an air outlet 234. The exhaust spool 232 can be movably disposed within the valve seat 231 between its closed position and its open position. The movement includes translation and rotation. Figure 2B illustrates an embodiment of a translational movement. The exhaust spool 232, in its open position, enables the second gas delivery port 212B to be in fluid communication with the gas outlet 234 to form an exhaust passage. The exhaust valve biasing member 233 abuts against the exhaust spool 232 to provide the exhaust spool 232 with movement resistance from the closed position to the open position, that is, when exhaling, the exhaust valve bias needs to be overcome The resistance created by member 233 causes exhaust valve spool 232 to move from its closed position to its open position to enable exhaled gas to escape. The exhaust valve biasing member 233 may be disposed on a side of the exhaust spool 232 that faces away from the cavity 210 and applies pressure to the exhaust spool 232 when it is in the closed position. This pressure needs to be overcome during exhalation to move the exhaust spool 232 to the closed position. During this movement, the pressure applied by the exhaust valve biasing member 233 is increased. In other embodiments not shown, the exhaust valve biasing member may be disposed on a side of the exhaust spool 232 that faces the cavity 210 and apply a pulling force to the exhaust spool 232 when it is in the closed position. This pull force needs to be overcome during exhalation to move the exhaust spool 232 to the closed position. During this movement, the pulling force applied by the exhaust valve biasing member 233 is increased. The exhaust valve biasing member 233 may be a spring or other elastomer or the like, and may also be made of a shape memory material such as an alloy or plastic having morphological memory properties. Further, the exhaust valve 230 may also adopt a structure similar to the intake valve 220.

Further preferably, the ventilation control device 200 further includes a shock absorbing mechanism 250. The damper mechanism 250 forms a damper chamber with a movable component (e.g., the vent spool 232) during exhalation in the valve assembly. The damper mechanism 250 is fixedly disposed relative to the cavity 210 when the movable member moves (that is, when exhaling) to change the volume of the damper chamber. The damping chamber has a shock absorbing vent. The damper chamber is only ventilated through the damper vent. Specifically, referring to FIGS. 2A-2B, the damper mechanism 250 and the vent spool 232 form a damper chamber 251. The shock absorbing mechanism 250 and the exhaust valve core 232 may be connected by a seal. In this embodiment, the damping chamber 251 is generally The upper portion is cylindrical, but in other embodiments not shown, the damper chamber 251 may have other shapes. The position of the damper mechanism 250 relative to the valve seat 231 is fixed when the vent spool 232 is moved between its closed position and its open position. The damper mechanism 250 can be coupled to the valve seat 231 or can be coupled to other non-movable components. Thus, when the exhaust valve body 232 moves, the volume of the damper chamber 251 changes. The damper chamber 251 has a damper vent 252 to vent the damper chamber 243 only through the damper vent 252. The shock absorbing vent 252 may be formed on the damper mechanism 250 as shown in FIG. 2B. In other embodiments not shown, a shock absorbing vent may also be formed on the exhaust valve spool 232. In addition, the shock absorbing vent may also be formed on the seal between the damper mechanism 250 and the vent valve core 232. When the exhaust valve body 232 moves, the volume change of the damper chamber 251 generates an internal and external air pressure difference, thereby generating a gas damping effect on the movement of the exhaust valve core 232, reducing the moving speed of the exhaust valve core 232, and achieving shock absorption. noise. Thereby, the noise generated by the movement of the mechanical components in the ventilation control device is further reduced by the method of damping.

The above muffler and shock absorbing mechanism can be combined with various types of valve assemblies as follows.

In one set of embodiments, as shown in FIG. 4A, a valve assembly 420 is disposed at the gas delivery port 412 to control gas flow to the gas delivery port 412. The valve assembly 420 includes an intake passage and an exhaust passage. The intake passage and the exhaust passage communicate with the cavity 410 through the gas delivery port 412. The valve assembly 420 is configured to conduct the intake passage when the pressure P ₁ within the chamber 410 is less than or equal to the atmospheric pressure P ₀ ; and the difference ΔP between the pressure P ₁ and the atmospheric pressure P ₀ within the chamber 410 is greater than or equal to a predetermined value When the exhaust passage is turned on. That is, only in the intake passage within the cavity pressure P is less than or equal to ₄₁₀₁ if the atmospheric pressure P ₀ is turned off as soon as the pressure P in the greater than atmospheric pressure P _{0 4101} once the cavity. Similarly, the exhaust passage is turned on only when the difference ΔP between the chamber 410 and the atmospheric pressure is greater than or equal to a predetermined value, and is immediately turned off once the difference ΔP between the chamber 410 and the atmospheric pressure is less than a predetermined value. When the patient inhales, the air pressure P _{1 in the} cavity 410 decreases, below the atmospheric pressure P ₀ , and the intake passage opens, at which time the exhaust passage is closed, corresponding to the inspiratory phase of the patient. When the patient exhales, the air pressure P ₁ within the cavity 410 increases above the atmospheric pressure P ₀ . When the air pressure P _{1 in the} cavity 410 is increased to a difference ΔP from the atmospheric pressure P ₀ by a predetermined value, the exhaust passage is opened, and the intake passage is closed, corresponding to the expiratory phase of the patient.

The muffling device 440 is in communication with the inlet of the intake passage and/or the outlet of the exhaust passage. As an example, the muffling device 440 can communicate to the outlet 424 of the valve assembly 420 on the outside of the valve assembly 420. The outlet 424 is both the inlet of the intake passage and the outlet of the exhaust passage. The muffler device 440 is similar to the muffler device 240 shown in FIGS. 2A-2B, and is provided with a plurality of muffling holes 441. The muffler 440 is coupled to the outlet 424 of the valve assembly 420 on the outside of the valve assembly 420.

In one embodiment, the valve assembly 420 can include a first valve mechanism 422 and a second valve mechanism 423. As shown in Figure 4A. The first valve mechanism 422 has a first closed position that closes the air inlet 412 and a first open position that opens the air inlet 412. A through hole is provided in the first valve mechanism 422. The second valve mechanism 423 is disposed at the through hole 422B. The second valve mechanism 423 has a second closed position that closes the through hole 422B and a second open position that opens the through hole 422B. Through the interaction of the two valve mechanisms, the patient's intake air flow and exhalation air flow can be used to automatically control their opening and closing, thereby achieving inspiratory no resistance or small resistance and positive expiratory pressure.

In one embodiment, in one aspect, the first valve mechanism 422 and the second valve mechanism 423 can cooperate to move between an original position and a venting position. The home position refers to a state in which an external force is not applied to the first valve mechanism 422 and the second valve mechanism 423 due to respiration. At this time, both the first valve mechanism 422 and the second valve mechanism 423 are in their respective closed positions. When the difference ΔP between the pressure P ₁ and the atmospheric pressure P _{0 in} the cavity 410 is greater than or equal to the predetermined value, the second valve mechanism 423 moves along with the first valve mechanism 422 to move to the vent position. The first valve mechanism 422 is now in the first open position and the second valve mechanism 423 is in the second closed position. The gas delivery port 211 is opened to form an exhaust passage. In this embodiment, the second valve mechanism 423 can be disposed on the first valve mechanism 422. Thus, during expiration, the pressure P in the cavity ₄₁₀₁ is increasing. When the difference ΔP between the pressure P ₁ and the atmospheric pressure P _{0 in} the cavity 410 is less than a predetermined value, the first valve mechanism 422 and the second valve mechanism 423 are in the home position, and the gas delivery port 412 is in the closed state. Once the difference ΔP between the pressure P ₁ and the atmospheric pressure P _{0 in} the cavity 410 is greater than or equal to the predetermined value, the second valve mechanism 423 moves along with the first valve mechanism 422 to the aeration position (moving to the right) to form a row. The air passages are also capable of maintaining a positive pressure within the cavity 410.

On the other hand, the opening and closing action of the second valve mechanism 223 itself can form an intake passage when the patient inhales. Specifically, at the time of inhalation, the pressure P _{1 in the} cavity 410 is continuously reduced. The first valve mechanism 422 is in a first closed position that closes the air inlet 412. When the pressure P _{1 in the} cavity 410 is less than or equal to the atmospheric pressure P ₀ , the second valve mechanism 423 is in the second open position in which the through hole 422B is opened to form an intake passage. When the inhalation is switched to exhalation, the pressure P _{1 in the} chamber 410 is increased. When the pressure P _{1 is} greater than the atmospheric pressure P ₀ , the second valve mechanism 423 closes the through hole 422B and repeats the above process. Since the difference ΔP between the pressure P ₁ and the atmospheric pressure P _{0 in} the cavity 410 at the time of inhalation does not reach the above predetermined value, the first valve mechanism 422 is maintained at its first closed position. The first valve mechanism 422 and the second valve mechanism 423 have various embodiments, and the present invention will be described with reference to the accompanying drawings.

Valve assembly 420 can also include a valve seat 421. The valve seat 421 is connected to the air inlet 412. The first valve mechanism 422 and the second valve mechanism 423 may both be disposed within the valve seat 421. In the embodiment to be described later, It is also possible that the first valve mechanism is disposed in the valve seat and the second valve mechanism is disposed in the cavity. An air outlet 424 is disposed on the valve seat 421. The air outlet 424 may be disposed at the distal end of the valve seat 421 or may be disposed on the side wall of the valve seat 421. The proximal and distal ends described herein are relative to the patient wearing the respiratory mask, and the end adjacent the patient is referred to as the proximal end, and vice versa.

In the embodiment illustrated in FIG. 4A, the first valve mechanism 422 can include a first spool 422A and a first biasing member 422C. The first spool 422A is moveable between a first closed position and a first open position. The first valve mechanism 422 can be disposed within the valve seat 421. The through hole 422B is provided on the first valve body 422A. The second valve mechanism 423 may be disposed on the first spool 422A at the through hole 422B. The first biasing member 422C abuts against the first spool 422A to provide the first spool 422A with movement resistance from the first closed position to the first open position. The first biasing member 422C applies a biasing force to the first spool 422A when the first spool 422A is shown in the first closed position to form a positive expiratory pressure. The second valve mechanism 423 can be made of an elastomeric material or a morphological memory material and is coupled to the first valve mechanism 422 from a side proximate the cavity 410. It can be understood that the first valve mechanism 422 can also adopt a configuration similar to the second valve mechanism 423, that is, made of elastic material or morphological memory material and connected to the cavity 410 on the side facing away from the cavity 410; Similarly, the second valve mechanism 423 can also adopt a configuration similar to that of the first valve mechanism 422 described above, that is, including a spool and a biasing member.

Preferably, the ventilation control device further includes a shock absorbing mechanism 450, as shown in FIG. 4A. The shock absorbing mechanism 450 is similar to the shock absorbing mechanism 250 shown in Figures 2A-2B. The damper mechanism 450 forms a damper chamber 451 with the movable member (i.e., the first spool 422A) during exhalation in the valve assembly 420. The shock absorbing mechanism 450 and the first valve body 422A may be connected by a seal. In this embodiment, the damper chamber 451 is generally circular in shape, although other shapes may be employed. When the first spool 422A moves (that is, when exhaling), the position of the damper mechanism 450 is fixed to change the volume of the damper chamber 451. The damper mechanism 450 can be coupled to the valve seat 421 or to other non-movable components. Thus, when the valve seat 421 moves, the volume of the damper chamber 451 changes. The damper chamber 451 has a damper vent 452 to vent the damper chamber 451 only through the damper vent 452. The shock absorbing vent 452 may be formed on the damper mechanism 450 as shown in FIG. 4A. In other embodiments not shown, the shock absorbing vent 452 may also be formed on the first spool 422A. In addition, the shock absorbing vent 452 may also be formed on the seal between the damper mechanism 450 and the first valve body 422A. When the first valve body 422A moves, the volume change of the damper chamber 451 generates an internal and external air pressure difference, thereby generating a gas damping effect on the movement of the first valve body 422A, reducing the moving speed of the first valve body 422A, and achieving shock absorption. noise. Thereby, the mechanism in the ventilation control device is further reduced by means of damping Noise generated by component movement.

Figure 4B provides a shock absorbing mechanism 450' of another configuration. The damper mechanism 450 shown in FIG. 4A is surrounded by the outer circumference of the first biasing member 422C, and thus its damper chamber 451 is annular. In the embodiment shown in Fig. 4B, the damper mechanism 450' is disposed in the first biasing member 422C, forming a damper chamber 451' with the projection 422D of the first spool 422A. Other components included in FIG. 4B, such as cavity 410, valve seat 421, second valve mechanism 423, and muffler 440 may be the same or similar to that shown in FIG. 4A. When inhaling, the second valve mechanism 423 opens the through hole 422B, and the air enters the ventilation control device from the sound absorbing hole 441, and enters the cavity 410 through the air hole 422E and the through hole 422B of the first valve mechanism 422. When exhaling, the first valve mechanism 422 and the second valve mechanism 423 move to the right to the ventilation position, and the gas in the cavity 410 is discharged through the gas transmission port 412 and the muffling hole 441. The position of the air hole 422E on the first valve body 422A may be other arrangements as long as the through hole 422B can be connected to the sound absorbing hole 441. In addition, a retaining device, such as a limiting slot 421A, may be provided on the valve seat 421 for restricting movement of the first valve mechanism 422 only between the home position and the venting position. When exhaling, the violent vibration of the first valve mechanism 422 produces noise. It should be noted that the limiting device can be added to various embodiments in which the movable member is present when the exhaust gas is described above and below.

In another embodiment, as shown in FIG. 5, the valve assembly 520 can include a first valve mechanism 521 and a second valve mechanism 522. The first valve mechanism 521 is disposed at the air inlet 512 of the cavity 510. The first valve mechanism 521 has a first closed position that closes the air inlet 512 and a first open position that opens the air inlet 512. The first valve mechanism 521 is provided with a through hole 523. The second valve mechanism 522 is disposed at the through hole 523. The second valve mechanism 522 has a second closed position that closes the through hole 523 and a second open position that opens the through hole 523. In one aspect, the first valve mechanism 521 and the second valve mechanism 522 cooperate to move between an original position and a venting position. When the pressure P in the chamber 510 _is less than or equal to atmospheric pressure P _0, the first valve mechanism 521 and the second valve mechanism 522 moves to the vent position, together, form an intake passage. In the embodiment shown in FIG. 5, the first valve mechanism 521 and the second valve mechanism 522 are moved to the left, a gap is formed between the first valve mechanism 521 and the air inlet 512, and the air inlet 512 is opened to form an air intake. Channel, corresponding to the patient's inspiratory phase. When the pressure P _{1 in the} cavity 510 is greater than the atmospheric pressure P ₀ , the first valve mechanism 521 is in the first closed position and the gas delivery port 512 is closed. When the patient is switched from inspiratory to expiratory, the pressure P _{1 in the} cavity 510 gradually increases. Since the pressure P _{1 in the} cavity 510 is greater than the atmospheric pressure P ₀ , the first valve mechanism 521 remains in the first closed state. position. When the pressure P _{1 in the} cavity 510 is increased to a difference ΔP from the atmospheric pressure P ₀ that is greater than or equal to the predetermined value, the second valve mechanism 522 enters the second open position of the opening through hole 523 to form an exhaust passage. When the difference ΔP between the pressure P ₁ and the atmospheric pressure P _{0 in} the cavity 510 is less than the predetermined value, the second valve mechanism 522 is in the second closed position in which the through hole 523 is closed.

Preferably, the ventilation control device shown in FIG. 5 may also include a muffling device 540. The plurality of silencing holes 541 of the muffling device 540 are connected to the gas delivery port 512. The gas delivery port 512 is used for both the intake air and the exhaust gas, and the muffler hole 541 can silence the intake air flow and the exhaust air flow. As mentioned above, for the air inlet which serves as both the air inlet and the exhaust port, the sound absorbing holes 541 connected thereto are preferably radially distributed along the exhaust direction, and the sound absorbing holes 541 connected thereto are connected. It is preferably tapered along the direction of the exhaust.

Further preferably, the ventilation control device may include a damping shock absorbing mechanism 560. The damper damper mechanism 560 is fixedly disposed relative to the cavity 510 during exhalation to provide frictional resistance to the movable component during exhalation in the valve assembly 520. In the embodiment shown in FIG. 5, the movable member at the time of exhalation is the second spool 522A. Due to the existence of frictional resistance, the moving speed of the second spool 522A is lowered, and shock absorption and noise reduction are achieved. Thereby, the noise generated by the movement of the mechanical components in the ventilation control device is further reduced by the method of damping. The damper damper mechanism 560 may be a block, a piece or a strip having a certain roughness disposed on the second valve body 522A and the first valve body 521A. The damper damper mechanism 560 may also be a gear, a rack, a slide, a chute, a combination thereof, or the like provided on the second spool 522A and the first spool 521A. It will be appreciated that the damping damper mechanism 560 can also be added to the embodiment shown in Figures 2A-2B and 4A. The movable member at the time of exhausting in FIGS. 2A-2B is the exhaust valve body 232, and the movable member at the time of exhausting in FIG. 4A is the first spool 422A.

Further, the ventilation control device may further include the above-described shock absorbing mechanism (not shown). The damper mechanism is similar to the damper mechanism 250 shown in FIGS. 2A-2B and the damper mechanism 450 shown in FIG. 4A. The damper mechanism and the second valve mechanism 522 form a damper chamber. The second valve mechanism 522 can include a second spool 522A and a second biasing member 522B. The shock absorbing mechanism and the second valve mechanism 522 (eg, with the second spool 522A) may be connected by a seal. When the second valve mechanism 522 opens the through hole 523, the position of the damper mechanism relative to the first valve mechanism 521 is fixed to change the volume of the damper chamber. The damper chamber has a damper vent to allow the damper chamber to vent only through the damper vent. When the first valve mechanism 521 and the second valve mechanism 522 move between the home position and the vent position (ie, the first valve mechanism 521 and the second valve mechanism 522 move leftward to the position for intake), the shock absorption The organization moves with them. The first valve mechanism 521 may include a first spool 521A and a first biasing member 521B. The biasing force generated by the second biasing member 521B is overcome during inhalation to move the first spool 521A and the second valve mechanism 522 to the left together. When the second valve mechanism 522 is moved from its second closed position to the second open position, the position of the shock absorbing mechanism relative to the first valve mechanism 521 is fixed. The damper mechanism 450 can be coupled to the first valve mechanism 521. Thus, when the second valve mechanism 522 moves, The volume of the chamber changes. The damper chamber has a damper vent to allow the damper chamber to vent only through the damper vent. When the second valve mechanism 522 moves, the volume change of the damper chamber 251 generates an internal and external air pressure difference, thereby generating a gas damping effect on the movement of the second valve mechanism 522, reducing the moving speed of the second valve mechanism 522, and achieving shock absorption. noise. Thereby, the noise generated by the movement of the mechanical components in the ventilation control device is further reduced by the method of damping.

In a preferred embodiment, the valve assembly may further include an adjustment mechanism for adjusting the predetermined value. As an example, as shown in FIG. 2B, the muffling device 240 may be disposed on the adjustment mechanism 260. The adjustment mechanism 260 can include a valve cover 261. The muffling device 240 may be disposed on the valve cover 261. The valve cover 261 is movably coupled to the valve seat 231. The adjustment mechanism 260 also includes a positioning structure for positioning the valve cover 261 relative to the valve seat 231. The positioning structure may be a mating thread disposed on the valve seat 231 and the valve cover 261. In other embodiments not shown, the positioning structure can include snaps, securing pins, and the like. One end of the exhaust valve biasing member 233 may be coupled to or abut against the exhaust valve spool 232, and the other end may be coupled or abutted against the valve cover 261. Thus, by adjusting the position of the valve cover 261 with respect to the valve seat 231, the biasing force of the exhaust valve biasing member 233 can be adjusted. In the presence of the damper mechanism 250, the damper mechanism 250 can be coupled to the bonnet 261. One end of the exhaust valve biasing member 233 is still connected or abuts against the exhaust valve spool 232, and the other end is connected or abuts against the damper mechanism 250, and the above-described adjustment function can also be realized.

Similarly, as shown in FIG. 4A, the adjustment mechanism 460 can also be used to adjust the resistance to movement provided to the first valve mechanism 422. The adjustment mechanism 460 is movably coupled to the valve seat 421 and positions the adjustment mechanism 460 relative to the valve seat 421 by a positioning structure. The positioning structure can be a mating thread disposed on the valve seat 421 and the adjustment mechanism 460. In other embodiments not shown, the positioning structure can be snapped, secured, or the like. One end of the biasing member can be coupled or abutted to the first valve mechanism 422 and the other end can be coupled or abutted to the adjustment mechanism 460. Thus, by adjusting the position of the adjustment mechanism 460 with respect to the valve seat 431, the biasing force of the biasing member can be adjusted. In the presence of the damper mechanism 450, the damper mechanism 450 can be coupled to the adjustment mechanism 460. One end of the biasing member is still connected or abuts against the first valve mechanism 422, and the other end is connected or abuts against the damper mechanism 450, and the above-described adjustment function can also be realized. The muffling device 440 can be disposed on the adjustment mechanism 460.

In other embodiments not shown, other methods may be employed to adjust the predetermined value.

Further preferably, the ventilation control device is provided with a pointing device (not shown) for indicating the adjusted predetermined value. The pointing device may be a mechanical identifier, such as a scale, a color logo, etc., or may be an electronic logo, such as by light, sound, electricity, or the like.

In yet another embodiment, referring back to Figures 3A-3B, the valve assembly 320 cooperates with the air delivery port to form an air inlet and an air outlet. The valve assembly 320 is configured as a pressure within the cavity 310 is less than or equal to P ₁ of the atmospheric pressure P ₀ time (i.e. the patient inhales), the intake port in communication with the mask vent and the pressure within the cavity 310 in the P ₁ of When the pressure is greater than the atmospheric pressure P ₀ (that is, when the patient exhales), the exhaust port is connected to the mask vent. In the embodiment of FIG. 3, the gas delivery port includes a first gas delivery port 312A and a second gas delivery port 312B that are spaced apart. The valve assembly 320 can be disposed at the first gas delivery port 312A. When the pressure P in the chamber _is less than or equal to 310 atm P _0, so that the valve assembly 320 can be opened. The first gas delivery port 312A and the second gas delivery port 312B form an air inlet. When the pressure P within chamber 310 _is greater than the atmospheric pressure P _0, so that the valve assembly 320 may be closed, the gas is discharged only from the second chamber gas delivery port 310 312B. The second gas delivery port 312B forms an exhaust port. The cross-sectional area of the exhaust port is set to maintain the pressure P ₁ in the cavity greater than the atmospheric pressure P ₀ during exhalation. For example, the opening area of the second gas delivery port 312B can be set smaller, so that the gas discharge rate is less than the patient's call. Gas rate. The cross-sectional area of the air inlet is larger than the cross-sectional area of the air outlet. When inhaling, the second air inlet 312B can also function as an auxiliary air intake. As described above, the muffling device may be disposed at the first gas delivery port 312A and/or the second gas delivery port 312B for the outgassing for muffling as the gas enters and/or exits the cavity. The muffling hole of the muffler device communicates to the first gas delivery port 312A and/or the second gas delivery port 312B on the outside of the cavity 310.

In another preferred embodiment, the valve assembly 620 is disposed at the gas delivery port 612 to control the flow of gas to all of the gas delivery ports 612. When the valve assembly 620 is open, the air inlet 612 is opened, and conversely, the air inlet 612 is closed. The valve assembly 620 is configured as a pressure within the cavity 610 is less than or equal to P ₁ of opening atmospheric pressure gas delivery port 612 P _0. That is to say, the valve assembly 620 is opened when inhaling, and the air inlet 612 is an intake port. The valve assembly 620 is provided with a through hole 623 that allows the cavity 610 to communicate with the atmosphere. The valve assembly 620 is also configured in the pressure P within the cavity 610 of the gas delivery ports 612 closed is greater than the atmospheric pressure P _{0 1.} That is, when exhaling, the pressure P _{1 in the} cavity 610 is greater than the atmospheric pressure P ₀ , the valve assembly 620 closes the gas delivery port 612, and the exhaled gas is discharged through the through hole 623. The through hole 623 is an exhaust port. The muffling device 640 can be coupled to the cavity 610 at the air inlet 612 outside of the cavity 610.

Further preferably, as shown in FIG. 6, the valve assembly 620 can include a resilient flap 621 and a resilient valve 624. The resilient flap 621 can be coupled to the cavity 610 at the gas delivery port 612 by a connector 622. The resilient flap 621 has a closed position that closes the air inlet 612 and an open position that opens the air inlet 612. A through hole 623 is provided on the elastic flap 621. The through hole 623 is in communication with the gas delivery port 612. The cross-sectional area of the through hole 623 is smaller than the cross-sectional area of the gas delivery port 612. When the pressure P _{1 in the} cavity 610 is greater than the atmospheric pressure P ₀ , the gas delivery port 612 is closed, and the gas in the cavity 610 is discharged through the through hole 623. The through hole 623 is generally small so that the pressure P ₁ within the cavity 610 during exhalation is greater than the atmospheric pressure P ₀ . Due to the elasticity of the elastic flap 621, the cross-sectional area of the through hole 623 increases as the pressure P ₁ in the cavity 610 increases. The resilient valve 624 is coupled to the through bore 623 on the outside of the cavity. Preferably, the resilient valve 624 can be integrally formed with the resilient flap 621. Of course, it is possible to adopt a manner in which the split bodies are formed and joined together. The elastic valve 624 is tapered along the exhaust direction of the through hole 623. When exhaling, the pressure P _{1 in the} cavity 610 increases, the elastic elastic valve flap 621 will expand toward the outside of the cavity 610, increasing the ventilation area of the through hole 623, and the ventilation area of the elastic valve 624 will also increase. . Thereby, the change of the pressure P ₁ in the cavity 610 can be counteracted, and a certain adjustment effect can be achieved, so that the pressure P _{1 is} maintained within a certain range and does not increase sharply due to the severe exhalation of the patient. And due to the elastic design of the valve nozzle 624 of tapered, better control of deformation of the through hole 623, and thus more stably control the variation within the cavity 610 of the pressure P ₁ is.

The embodiment shown in Figure 6 adjusts the venting area by the elasticity of the valve itself. In yet another preferred embodiment, an adjustment mechanism of another manner may be provided on the basis of FIG. 3A. As shown in FIG. 7, the adjustment mechanism 770 includes a fixing member 771, a movable member 772, a positioning structure 773, and an adjusting member 774. The cavity 710 has a first gas delivery port 712A and a second gas delivery port 712B. A valve assembly 720 is disposed at the first gas delivery port 712A. Valve assembly 720 is substantially identical to valve assembly 320 shown in Figure 3A and will not be described in detail herein. The fixture 771 is coupled to the cavity 710 at the second air inlet 712B. The movable member 772 is movably coupled to the fixing member 771. The muffling device 740 can be disposed on the movable member 772. The fixing member 771 and the movable member 772 form a relatively sealed cavity so that the gas discharged from the second gas delivery port 712B can be discharged only from the plurality of silencing holes 741 on the muffler device 740, thereby suppressing the discharged gas. The positioning structure 773 is for positioning the movable member 772 relative to the fixing member 771. In the embodiment shown in FIG. 7, the positioning structure 773 can be a mating thread disposed on the fastener 771 and the movable member 772. In other embodiments not shown, the positioning structure can be a snap, a securing pin, or the like. The head 774A of the adjustment member 774 is configured to be receivable in the second air inlet 712B. The head 774A of the adjustment member 774 has a different cross-sectional area along the gas flow direction of the second gas delivery port 712B. Thus, when the different positions of the head 774A enter the second air inlet 712B, the head 774A of the adjusting member 774 can block the airflow flowing through the second air inlet 712B, thereby adjusting the second air inlet 712B. Ventilation area. The adjustment member 774 is coupled to the movable member 772. The adjustment member 774 is moved along the gas flow direction of the second gas delivery port 712B by the movement of the movable member 772. And, after moving to the appropriate position, the relative position between the movable member 772 and the fixed member 771 is fixed by the positioning structure 773.

The invention also provides a respiratory mask device. The respiratory mask device includes any of the respiratory masks described above and any of the aeration control devices described above. The ventilation control is connected to the breathing mask and is vented through the mask vent with the breathing mask. For the various components and structures they contain, reference can be made to The description of the corresponding part of the text.

When the patient exhales, the pressure inside the breathing mask will be higher than atmospheric pressure. The invention utilizes the characteristics of expiratory air pressure change to provide a ventilation control device capable of realizing positive expiratory pressure, avoiding patient discomfort caused by continuous positive pressure; without using a positive pressure gas supply device (such as a CPAP ventilator) and The pipeline is convenient for the patient to move; when the patient is out, there is no need to carry the positive pressure gas supply device, and the patient can wear the respiratory mask with the ventilation control device for treatment at any time. In addition, the ventilation control device also increases the noise reduction device by using the principle of small hole injection silencer to reduce the noise generated by the ventilation control device during use; since the noise reduction device is small in size, it does not affect the compact design of the ventilation control device; When the muffler is connected to the gas outlet for discharging the gas, the gas discharged through the muffler hole is relatively diverged, so that the discharged gas can be prevented from being blown to the obstacle to generate noise, and the discomfort to the human body can be alleviated. Further, the ventilation control device is small in size, convenient to carry, and low in cost.

The present invention has been described by the above-described embodiments, but it should be understood that the above-described embodiments are only for the purpose of illustration and description. Further, those skilled in the art can understand that the present invention is not limited to the above embodiments, and various modifications and changes can be made according to the teachings of the present invention. These modifications and modifications are all claimed in the present invention. Within the scope. The scope of the invention is defined by the appended claims and their equivalents.

Claims (20)

1. A ventilation control device for a respiratory mask, comprising:

   a cavity having a mask vent and one or more air vents, the air vent communicating with the mask vent, the mask vent for communicating with the respiratory mask;

   a valve assembly disposed at at least one of the gas delivery ports, the valve assembly configured to maintain a pressure within the chamber greater than atmospheric pressure when exhaling;

   a muffling device comprising a plurality of muffling holes, the plurality of muffling holes communicating with at least one of the gas delivery ports to allow gas to enter the gas delivery port via the plurality of muffle holes, and/or The gas discharged from the gas outlet is discharged through the plurality of silencing holes.
2. The ventilation control device according to claim 1, wherein a minimum diameter of said plurality of silencing holes is less than or equal to 3 mm, and/or a pitch of said plurality of silencing holes is 1.5-7 mm.
3. The ventilation control device according to claim 1, wherein a central axis of said plurality of silencing holes is radially distributed along an exhaust direction of a gas delivery port communicating with them.
4. The ventilation control device according to claim 1, wherein said plurality of silencing holes are tapered in a direction of airflow when said plurality of silencing holes are communicated to an air inlet for intake or for exhausting; The plurality of silencing holes are tapered along the exhaust direction when the plurality of silencing holes are communicated to the gas ports for both the intake and the exhaust.
5. The ventilation control device according to claim 1, wherein said ventilation control device further comprises a damper mechanism that forms a damper chamber with a movable member during exhalation in said valve assembly, said The shock absorbing mechanism is fixedly disposed relative to the cavity when exhaling, and the shock absorbing cavity has a shock absorbing vent.
6. The ventilation control device according to claim 1, wherein said ventilation control device further comprises a damping damping mechanism, said damping damping mechanism being fixedly disposed relative to said cavity when exhaling, said damping damping The mechanism provides frictional resistance to the movable component during exhalation in the valve assembly.
7. The ventilation control device according to any one of claims 1 to 6, wherein the valve assembly has an intake passage and an exhaust passage, and the intake passage and the exhaust passage pass through the gas passage Communicating with the cavity, wherein the valve assembly is configured to conduct the intake passage when a pressure within the chamber is less than or equal to atmospheric pressure; and a difference between a pressure and an atmospheric pressure within the chamber is greater than or equal to The exhaust passage is turned on when predetermined, wherein the muffler is connected to an inlet of the intake passage and/or an outlet of the exhaust passage.
8. The ventilating control device of claim 7 wherein said valve assembly comprises:

   a first valve mechanism having a first closed position that closes the air inlet and a first open position that opens the air inlet, the first valve mechanism is provided with a through hole, and the first valve mechanism includes a Removable component; and

   A second valve mechanism is disposed at the through hole, having a second closed position that closes the through hole and a second open position that opens the through hole.
9. The ventilating control apparatus according to claim 8, wherein said valve assembly includes a valve seat connected to said gas delivery port, said valve seat being provided with an air outlet, said first valve mechanism being disposed at said Inside the valve seat and include:

   a first valve core, the through hole is disposed on the first valve core, and the first valve core is the movable component;

   A first biasing member abuts against the first spool to provide the first spool with a resistance to movement from the first closed position to the first open position.
10. The ventilation control device according to any one of claims 1 to 6, wherein the air inlet includes an air inlet and an air outlet, and the valve assembly includes:

    An intake valve disposed at the intake port, the intake valve being configured to open when a pressure within the chamber is less than or equal to atmospheric pressure;

    An exhaust valve disposed at the exhaust port, the exhaust valve being configured to open when a difference between a pressure in the chamber and an atmospheric pressure is greater than or equal to a predetermined value,

    Wherein the muffling device is disposed at the air inlet and/or the exhaust port.
11. The ventilation control device according to claim 10, wherein said exhaust valve comprises:

    a valve seat connected to the exhaust port;

    An exhaust valve spool having a closed position closing the exhaust port and an open position opening the exhaust port, the exhaust valve spool being the movable member;

    An exhaust valve biasing member abuts against the exhaust valve spool to provide the exhaust spool with a resistance to movement from the closed position to the open position.
12. The ventilation control device according to claim 7 or 10, wherein the valve assembly includes an adjustment mechanism for adjusting the predetermined value.
13. The ventilation control device according to claim 9 or 11, wherein said valve assembly includes an adjustment mechanism for adjusting said predetermined value, said adjustment mechanism comprising:

    a bonnet movably coupled to the valve seat, the first biasing member or the exhaust valve biasing member correspondingly abutting between the first spool and the bonnet or Between the exhaust spool and the bonnet;

    a positioning structure for positioning the bonnet relative to the valve seat,

    Wherein the muffling device is disposed on the valve cover.
14. The ventilating control apparatus according to claim 1, wherein said valve assembly cooperates with said air inlet to form an intake port and an exhaust port; said valve assembly is configured such that a pressure in said chamber is less than or equal to atmospheric pressure The air inlet is communicated with the mask vent, and the air vent is communicated with the mask vent when the pressure in the chamber is greater than atmospheric pressure, wherein the air inlet crosses The area is greater than the cross-sectional area of the exhaust port, and the exhaust port is capable of maintaining a pressure in the chamber greater than atmospheric pressure when exhaling.
15. The ventilating control apparatus according to claim 14, wherein said gas delivery port comprises a first gas delivery port and a second gas delivery port which are disposed at intervals, and said valve assembly is disposed at said first gas delivery port; The first gas delivery port is opened when the pressure in the cavity is less than or equal to atmospheric pressure, and the first gas delivery port and the second gas delivery port are the air inlet; when the pressure in the cavity is greater than atmospheric pressure The first gas delivery port is closed, the second gas delivery port is the exhaust port, and the noise reduction device is disposed at the first gas delivery port and/or the second gas delivery port.
16. The ventilation control device according to claim 15, wherein said second air delivery port is formed by a plurality of silencing holes of said muffling device.
17. The ventilation control device according to claim 15, wherein said valve assembly includes an adjustment mechanism for adjusting a ventilation area of said second air delivery port.
18. The ventilation control device according to claim 17, wherein said adjustment mechanism comprises:

    a fixing member connected to the cavity at the second gas delivery port;

    a movable member movably connected to the fixing member, the noise reduction device is disposed on the movable member, and the second air inlet is connected to the atmosphere via the plurality of silencing holes of the noise reduction device ;

    a positioning structure for positioning a position of the movable member relative to the fixing member;

    An adjusting member, the head of the adjusting member is disposed to be accommodated in the second air inlet and has a different cross-sectional area along a gas flow direction of the second air inlet, and the adjusting member is connected to the The movable member is capable of driving the adjusting member to move along a gas flow direction of the second air inlet.
19. The ventilating control device of claim 14 wherein said valve assembly comprises:

    An elastic flap having a closed position for closing the gas outlet and an open position for opening the gas outlet; The elastic valve flap is provided with a through hole, and the through hole is the exhaust port;

    An elastic valve port is connected to the through hole on an outer side of the cavity, and the elastic valve port is tapered along an exhaust direction of the through hole.
20. A respiratory mask device, comprising:

    Breathing mask;

    The ventilation control device according to any one of claims 1 to 19, wherein the ventilation control device is coupled to the respiratory mask and is ventilated with the respiratory mask through the mask vent.

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