EP2570156A2 - Directional valve and respirator mask with a directional valve - Google Patents

Directional valve and respirator mask with a directional valve Download PDF

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Publication number
EP2570156A2
EP2570156A2 EP12156933A EP12156933A EP2570156A2 EP 2570156 A2 EP2570156 A2 EP 2570156A2 EP 12156933 A EP12156933 A EP 12156933A EP 12156933 A EP12156933 A EP 12156933A EP 2570156 A2 EP2570156 A2 EP 2570156A2
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EP
European Patent Office
Prior art keywords
valve
membrane
valve membrane
sealing surface
fixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12156933A
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German (de)
French (fr)
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EP2570156A3 (en
EP2570156B1 (en
Inventor
Michael Rosert
Dennis Leske
Harald Heyer
Thomas Pancur
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Draeger Safety AG and Co KGaA
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Draeger Safety AG and Co KGaA
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Publication of EP2570156A2 publication Critical patent/EP2570156A2/en
Publication of EP2570156A3 publication Critical patent/EP2570156A3/en
Application granted granted Critical
Publication of EP2570156B1 publication Critical patent/EP2570156B1/en
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/10—Valves

Definitions

  • the invention relates to a directional valve and a respirator with a directional valve.
  • a respirator with connection openings for filters and an inhalation valve and an exhalation valve is from the DE 40 17 336 C1 known.
  • a connection adapter which can be attached in two preferred positions on a half mask
  • respirator filters can be attached at different points of the half mask.
  • directional valves which are arranged both in the area of the respiratory protection filter and the gas outlet of the respiratory mask, the gas flow is passed through the respiratory protection filter in the mask interior to the mask wearer and during the exhalation, the breathing gas passes through an exhalation valve into the environment.
  • the directional valves consist of a valve seat and a valve diaphragm resting on the valve seat, which is mounted centrally on the valve seat.
  • valve diaphragm With a gas flow through the directional valve, the valve diaphragm lifts off the valve seat so that a gas flow is possible.
  • a disadvantage of the known valve design is that the flow resistance is relatively high, since due to the central attachment of the valve membrane, the length of the deflectable by the gas flow membrane portion is limited by the diameter of the valve seat.
  • valves for respiratory masks which have a valve mounted on one side of the valve seat valve membrane, which can lift itself like a flap from the valve seat.
  • a directional valve is an example of the US Pat. No. 6,047,698 out.
  • a rectangular shaped valve membrane rests on a flat valve seat and is pressed against the valve seat by a fixing lug fixed to the edge of the valve cover.
  • the invention has for its object to improve a directional valve in terms of its functional properties and specify a respirator with a corresponding directional valve.
  • a high tightness of the valve should be ensured even if the exhaled air has a high moisture content or the respirator is used in a humid environment.
  • valve membrane is preferably circular, but it may also be oval, elliptical, square or rectangular.
  • the axial length of the diameter D of the valve diaphragm In the case of an elliptical valve membrane, the length of the major axis is to be understood as the length of the greatest length of the longitudinal axis.
  • the valve membrane is fixed by a fixing lug on the valve seat.
  • the fixing nose is arranged on the valve housing, preferably on one Valve cover of the existing valve cover and valve seat valve housing.
  • the dimensions of the fixing lug are dimensioned so that the valve diaphragm rests against the sealing surface of the valve seat when the valve is not flowed through.
  • the fixing nose is Y-shaped and has a plurality of fixing points.
  • Respiratory masks with the directional valve according to the invention are half masks, full masks, filtering half masks, but also protective hoods can be equipped with the directional valve.
  • FIG. 1 shows in a valve seat 1 with a flat sealing surface 2, which surrounds a gas flowed through the opening 3.
  • the opening 3 is divided by a valve cross 4 into four sectors.
  • a valve cross 4 Around the sealing surface 2 around is a raised edge 5, the one in the FIG. 1 not shown valve membrane receives, and centered with respect to the sealing surface 2.
  • On the outside of the edge 5 are a centering projection 6 and a circumferential bead 7.
  • the underside 8 of the valve seat 1 is connected to a filter mask, not shown in the figure.
  • the webs of the valve cross 4 intersect at a center 9th
  • FIG. 2 illustrates a valve cover 10 which is seated on the valve seat 1; FIG. 1 , is placed and for this purpose has a centering groove 11, corresponding to the centering projection 6 and a circumferential groove 12, corresponding to the bead 7.
  • the valve cover 10 has on the inside of a fixing nose 13, which is aligned with the sealing surface 2 out.
  • the valve seat 1 and the valve cover 10 together form a valve housing 15.
  • the directional valve 20 is formed by the valve housing 15 with inserted valve membrane 16.
  • the directional valve 20 is connected as exhalation valve on the underside 8 of the valve seat 1 with a filter mask 22.
  • the filter mask 22 and the directional valve 20 together form a respirator, FIG. 3 ,
  • FIG. 3 shows the directional valve 20 in longitudinal section and partially the respirator.
  • the same components are given the same reference numbers FIGS. 1 and 2 designated.
  • the fixing lug 13 is fastened to the inside of the valve cover 10 in such a way that an offset x results relative to the center 9. Based on the diameter D of the valve membrane 16, the ratio x / D is in a range between 8% and 15%.
  • the positioning of the fixing nose 13 in the vicinity of the center 9 causes the Valve membrane 16 on both sides of the fixing lug 13 in the gas flow from the sealing surface 2 lifts.
  • the exhaled gas passes through outflow openings 14 into the environment.
  • FIG. 4 shows the flow resistance R as a function of the gas flow dV / dt through the directional valve 20.
  • the abscissa shows the gas flow dV / dt in a range up to 160 L / min and plotted on the ordinate the flow resistance R as back pressure in a range up to 6 mbar.
  • Curve 24 shows the flow resistance R as the first limit value for a fixing nose 13 positioned in the center 9, position "A" in FIG FIG. 3 , FIG. 4 FIG. 2 illustrates, as a second limit value, the flow resistance R for a position of the fixing nose on the edge of the sealing surface 2, position "B" in FIG FIG.
  • the middle curve 26 shows the flow resistance R for the inventive arrangement of the fixing lug 13, position "C" in the FIG. 3 ,
  • the fixing nose 13 is offset by only 8% relative to the center 9 with respect to the diameter D, the flow resistance R increases with a gas flow of 80 L / min, compared with the position of the fixing nose "B”, only by 0.6 mbar. while at a centrally positioned fixing nose, corresponding to position "A", the flow resistance more than doubled.

Abstract

The valve has a fixing lug arranged at a valve housing for fixing a valve membrane in a valve seat (1) and for supporting sealing of a flat sealing surface (2) by the valve membrane during an inspiration phase. The fixing lug is arranged between a surface center of the valve membrane and an edge of the valve membrane such that an entire circumferential area of the valve membrane is lifted-out from the sealing surface during an expiration phase, and a flow resistance for an expired air, which is low in relation to a central arrangement of the fixing lug is adjusted. An independent claim is also included for a breathing mask.

Description

Die Erfindung betrifft ein Richtungsventil und eine Atemschutzmaske mit einem Richtungsventil.The invention relates to a directional valve and a respirator with a directional valve.

Eine Atemschutzmaske mit Anschlussöffnungen für Filter sowie einem Einatemventil und einem Ausatemventil ist aus der DE 40 17 336 C1 bekannt. Mittels eines Anschlussadapters, der in zwei Vorzugsstellungen an einer Halbmaske befestigt werden kann, können Atemschutzfilter an unterschiedlichen Stellen der Halbmaske angebracht werden. Mittels Richtungsventilen, die sowohl im Bereich der Atemschutzfilter als auch am Gasauslass der Atemschutzmaske angeordnet sind, wird der Gasfluss über die Atemschutzfilter in den Maskeninnenraum zum Maskenträger geleitet und während der Ausatemphase gelangt das Atemgas über ein Ausatemventil in die Umgebung. Die Richtungsventile bestehen aus einem Ventilsitz und einer auf dem Ventilsitz aufliegenden Ventilmembran, die mittig am Ventilsitz befestigt ist. Bei einer Gasströmung durch das Richtungsventil hebt die Ventilmembran vom Ventilsitz ab, so dass ein Gasfluss ermöglicht ist. Nachteilig bei der bekannten Ventilkonstruktion ist, dass der Strömungswiderstand relativ hoch ist, da aufgrund der mittigen Befestigung der Ventilmembran die Länge des durch den Gasstrom auslenkbaren Membranabschnittes durch den Durchmesser des Ventilsitzes begrenzt ist.A respirator with connection openings for filters and an inhalation valve and an exhalation valve is from the DE 40 17 336 C1 known. By means of a connection adapter, which can be attached in two preferred positions on a half mask, respirator filters can be attached at different points of the half mask. By means of directional valves, which are arranged both in the area of the respiratory protection filter and the gas outlet of the respiratory mask, the gas flow is passed through the respiratory protection filter in the mask interior to the mask wearer and during the exhalation, the breathing gas passes through an exhalation valve into the environment. The directional valves consist of a valve seat and a valve diaphragm resting on the valve seat, which is mounted centrally on the valve seat. With a gas flow through the directional valve, the valve diaphragm lifts off the valve seat so that a gas flow is possible. A disadvantage of the known valve design is that the flow resistance is relatively high, since due to the central attachment of the valve membrane, the length of the deflectable by the gas flow membrane portion is limited by the diameter of the valve seat.

Es sind Richtungsventile für Atemmasken bekannt, die eine einseitig am Ventilsitz befestigte Ventilmembran aufweisen, welche sich klappenartig vom Ventilsitz abheben kann. Ein derartiges Richtungsventil geht beispielhaft aus der US 6 047 698 hervor. Eine rechteckförmig zugeschnittene Ventilmembran liegt auf einem ebenen Ventilsitz auf und wird durch eine am Rand des Ventildeckels befestigten Fixierungsnase gegen den Ventilsitz gedrückt. Gegenüber einem Richtungsventil mit mittig befestigter Ventilmembran lässt sich mit dieser Ventilkonstruktion zwar ein deutlich geringerer Strömungswiderstand realisieren, jedoch ergeben sich aufgrund der einseitigen Befestigung der Ventilmembran höhere Leckagewerte und die Ventilmembran kann bei eventueller Kondensation von feuchter Ausatmluft an der Innenseite des Ventildeckels durch Adhäsionskräfte haften bleibt, wodurch sich der Schießvorgang des Richtungsventils verzögert oder dieser auch völlig unterbleiben kann.There are directional valves for respiratory masks are known which have a valve mounted on one side of the valve seat valve membrane, which can lift itself like a flap from the valve seat. Such a directional valve is an example of the US Pat. No. 6,047,698 out. A rectangular shaped valve membrane rests on a flat valve seat and is pressed against the valve seat by a fixing lug fixed to the edge of the valve cover. Opposite one Directional valve with centrally mounted valve diaphragm can be realized with this valve construction, although a significantly lower flow resistance, however, resulting due to the unilateral attachment of the valve diaphragm higher leakage values and the valve diaphragm can adhere to any condensation of moist Ausatmluft on the inside of the valve cover by adhesive forces, which the shooting process of the directional valve delayed or this can also be completely omitted.

Der Erfindung liegt die Aufgabe zugrunde, ein Richtungsventil hinsichtlich seiner funktionellen Eigenschaften zu verbessern und eine Atemschutzmaske mit einem entsprechenden Richtungsventil anzugeben. Insbesondere soll eine hohe Dichtigkeit des Ventils auch dann sichergestellt, wenn die Ausatemluft einen hohen Feuchtigkeitsgehalt aufweist oder die Atemschutzmaske in einer feuchten Umgebung eingesetzt wird.The invention has for its object to improve a directional valve in terms of its functional properties and specify a respirator with a corresponding directional valve. In particular, a high tightness of the valve should be ensured even if the exhaled air has a high moisture content or the respirator is used in a humid environment.

Diese Aufgabe wird mit einem Richtungsventil mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with a directional valve having the features of patent claim 1.

Außerdem wird diese Aufgabe durch eine Atemschutzmaske mit einem Richtungsventil gelöst, die die Merkmale des Patentanspruchs 6 aufweist.In addition, this object is achieved by a respirator with a directional valve having the features of claim 6.

Es hat sich gezeigt, dass bei einer geringfügig außermittigen Fixierung der Ventilmembran in einem Bereich zwischen 8% und 15% der Achsenlänge D der größten Längserstreckung der Ventilmembran der Strömungswiderstand deutlich abfällt. Für den Fall einer runden, außermittig fixierten Ventilmembran beträgt der Strömungswiderstand bis zu einem Gasfluss von etwa 80 L/min nur etwa 60% des Wertes einer mittig befestigten Ventilmembran. Die Ventilmembran ist bevorzugt kreisförmig ausgeführt, sie kann aber auch oval, elliptisch, quadratisch oder rechteckförmig ausgebildet sein. Bei einer kreisförmig ausgebildeten Ventilmembran ist die Achsenlänge der Durchmesser D der Ventilmembran. Unter der Achsenlänge der größten Längserstreckung ist für den Fall einer elliptischen Ventilmembran die Länge der Hauptachse zu verstehen. Die Ventilmembran wird durch eine Fixierungsnase am Ventilsitz fixiert. Die Fixierungsnase ist am Ventilgehäuse angeordnet, bevorzugt an einem Ventildeckel des aus Ventildeckel und Ventilsitz bestehenden Ventilgehäuses.It has been found that with a slightly eccentric fixation of the valve membrane in a range between 8% and 15% of the axial length D of the greatest longitudinal extent of the valve membrane, the flow resistance drops significantly. In the case of a round, eccentrically fixed valve membrane, the flow resistance is up to a gas flow of about 80 L / min only about 60% of the value of a centrally mounted valve diaphragm. The valve membrane is preferably circular, but it may also be oval, elliptical, square or rectangular. In a circular shaped valve membrane, the axial length of the diameter D of the valve diaphragm. In the case of an elliptical valve membrane, the length of the major axis is to be understood as the length of the greatest length of the longitudinal axis. The valve membrane is fixed by a fixing lug on the valve seat. The fixing nose is arranged on the valve housing, preferably on one Valve cover of the existing valve cover and valve seat valve housing.

Die Abmessungen der Fixierungsnase sind so bemessen, dass die Ventilmembran bei nicht durchströmtem Ventil an der Dichtfläche des Ventilsitzes anliegt. Vorzugsweise ist die Fixierungsnase Y-förmig ausgebildet und weist mehrere Fixierungspunkte auf. Durch diese Gestaltung kann eine gezielte Wölbung der Ventilmembran erzielt werden, so dass die Ventilmembran mit einer Vorspannung an der Dichtfläche anliegt und eine gesicherte Abdichtung gewährleistet ist. Bei der erfindungsgemäßen, außermittigen Befestigung der Ventilmembran ergibt sich außerdem der Vorteil, dass Haftungseffekte der Ventilmembran am Ventildeckel infolge von auskondensierter Feuchtigkeit nicht auftreten, da der Hub der frei beweglichen Fläche der Ventilmembran bei einer leicht außermittigen Fixierung deutlich kleiner ist als bei einer Fixierung am Rand. Da sich die Ventilmembran beidseits der Fixierungsnase, die die Ventilmembran am Ventilsitz fixiert, frei bewegen kann, steht die gesamte, innerhalb der Dichtungsfläche liegende Öffnung für die Gasdurchströmung zur Verfügung. Mit der erfindungsgemäßen, außermittigen Fixierung der Ventilmembran wird sowohl eine mechanisch stabile Befestigung der Ventilmembran in der Nähe des Membranmittelpunktes als auch ein gegenüber der mittigen Befestigung reduzierter Strömungswiderstand erreicht.The dimensions of the fixing lug are dimensioned so that the valve diaphragm rests against the sealing surface of the valve seat when the valve is not flowed through. Preferably, the fixing nose is Y-shaped and has a plurality of fixing points. By this design, a targeted curvature of the valve membrane can be achieved, so that the valve diaphragm rests with a bias on the sealing surface and a secure seal is ensured. In the eccentric mounting of the valve diaphragm according to the invention, there is also the advantage that adhesion effects of the valve diaphragm on the valve cover due to condensed moisture does not occur, since the stroke of the freely movable surface of the valve membrane at a slightly eccentric fixation is significantly smaller than at a fixation on the edge , Since the valve membrane on both sides of the fixing lug, which fixes the valve membrane to the valve seat, can move freely, the entire, lying within the sealing surface opening for the gas flow is available. With the eccentric fixation of the valve membrane according to the invention, both a mechanically stable attachment of the valve membrane in the vicinity of the membrane center and a reduced flow resistance compared to the central attachment are achieved.

Atemschutzmasken mit dem erfindungsgemäßen Richtungsventil sind Halbmasken, Vollmasken, filtrierende Halbmasken, aber auch Schutzhauben können mit dem Richtungsventil ausgestattet werden.Respiratory masks with the directional valve according to the invention are half masks, full masks, filtering half masks, but also protective hoods can be equipped with the directional valve.

Ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung ist in der Zeichnung dargestellt und im Folgenden näher erläutert.An embodiment of the device according to the invention is shown in the drawing and explained in more detail below.

Es zeigen:

Figur 1
einen Ventilsitz,
Figur 2
einen Ventildeckel,
Figur 3
ein Richtungsventil im Längsschnitt,
Figur 4
Messergebnisse des Strömungswiderstandes R in Abhängigkeit vom Gasfluss durch das Richtungsventil, dV/dt.
Show it:
FIG. 1
a valve seat,
FIG. 2
a valve cover,
FIG. 3
a directional valve in longitudinal section,
FIG. 4
Measurement results of the flow resistance R as a function of the gas flow through the directional valve, dV / dt.

Figur 1 zeigt in einen Ventilsitz 1 mit einer ebenen Dichtungsfläche 2, die eine vom Gas durchströmte Öffnung 3 umgibt. Die Öffnung 3 wird durch ein Ventilkreuz 4 in vier Sektoren unterteilt. Um die Dichtungsfläche 2 herum befindet sich ein hochstehender Rand 5, der eine in der Figur 1 nicht dargestellte Ventilmembran aufnimmt, und gegenüber der Dichtungsfläche 2 zentriert. An der Außenseite des Randes 5 befinden sich ein Zentriervorsprung 6 und ein umlaufender Wulst 7. Die Unterseite 8 des Ventilsitzes 1 ist mit einer in der Figur nicht dargestellten Filtermaske verbunden. Die Stege des Ventilkreuzes 4 kreuzen sich in einem Mittelpunkt 9. FIG. 1 shows in a valve seat 1 with a flat sealing surface 2, which surrounds a gas flowed through the opening 3. The opening 3 is divided by a valve cross 4 into four sectors. Around the sealing surface 2 around is a raised edge 5, the one in the FIG. 1 not shown valve membrane receives, and centered with respect to the sealing surface 2. On the outside of the edge 5 are a centering projection 6 and a circumferential bead 7. The underside 8 of the valve seat 1 is connected to a filter mask, not shown in the figure. The webs of the valve cross 4 intersect at a center 9th

Figur 2 veranschaulicht einen Ventildeckel 10, der auf den Ventilsitz 1, Figur 1, aufgesetzt wird und hierzu eine Zentriernut 11, korrespondierend zum Zentriervorsprung 6 und eine umlaufende Nut 12, korrespondierend zum Wulst 7 besitzt. Der Ventildeckel 10 besitzt an der Innenseite einer Fixierungsnase 13, der zur Dichtungsfläche 2 hin ausgerichtet ist. FIG. 2 FIG. 2 illustrates a valve cover 10 which is seated on the valve seat 1; FIG. 1 , is placed and for this purpose has a centering groove 11, corresponding to the centering projection 6 and a circumferential groove 12, corresponding to the bead 7. The valve cover 10 has on the inside of a fixing nose 13, which is aligned with the sealing surface 2 out.

Der Ventilsitz 1 und der Ventildeckel 10 bilden zusammen ein Ventilgehäuse 15. Das Richtungsventil 20 wird durch das Ventilgehäuse 15 mit eingelegter Ventilmembran 16 gebildet. Das Richtungsventil 20 ist als Ausatemventil an der Unterseite 8 des Ventilsitzes 1 mit einer Filtermaske 22 verbunden. Die Filtermaske 22 und das Richtungsventil 20 bilden zusammen eine Atemschutzmaske, Figur 3.The valve seat 1 and the valve cover 10 together form a valve housing 15. The directional valve 20 is formed by the valve housing 15 with inserted valve membrane 16. The directional valve 20 is connected as exhalation valve on the underside 8 of the valve seat 1 with a filter mask 22. The filter mask 22 and the directional valve 20 together form a respirator, FIG. 3 ,

Figur 3 zeigt das Richtungsventil 20 im Längsschnitt und ausschnittsweise die Atemschutzmaske. Gleiche Komponenten sind mit gleichen Bezugsziffern der Figuren 1 und 2 bezeichnet. Die Fixierungsnase 13 ist an der Innenseite des Ventildeckels 10 derart befestigt, dass sich gegenüber dem Mittelpunkt 9 ein Versatz x ergibt. Bezogen auf den Durchmesser D der Ventilmembran 16 liegt das Verhältnis x / D in einem Bereich zwischen 8% und 15%. Die Positionierung der Fixierungsnase 13 in der Nähe des Mittelpunktes 9 führt dazu, dass sich die Ventilmembran 16 beidseits der Fixierungsnase 13 bei der Gasdurchströmung von der Dichtungsfläche 2 abhebt. Das ausgeatmete Gas gelangt über Ausströmöffnungen 14 in die Umgebung. FIG. 3 shows the directional valve 20 in longitudinal section and partially the respirator. The same components are given the same reference numbers FIGS. 1 and 2 designated. The fixing lug 13 is fastened to the inside of the valve cover 10 in such a way that an offset x results relative to the center 9. Based on the diameter D of the valve membrane 16, the ratio x / D is in a range between 8% and 15%. The positioning of the fixing nose 13 in the vicinity of the center 9 causes the Valve membrane 16 on both sides of the fixing lug 13 in the gas flow from the sealing surface 2 lifts. The exhaled gas passes through outflow openings 14 into the environment.

Figur 4 zeigt den Strömungswiderstand R in Abhängigkeit vom Gasfluss dV/dt durch das Richtungsventil 20. Auf der Abszisse ist der Gasfluss dV/dt in einem Bereich bis 160 L/min und auf der Ordinate der Strömungswiderstand R als Staudruck in einem Bereich bis 6 mbar aufgetragen. Kurve 24 zeigt als ersten Grenzwert den Strömungswiderstand R für eine im Mittelpunkt 9 positionierte Fixierungsnase 13, Position "A" in Figur 3. Figur 4 veranschaulicht als zweiten Grenzwert den Strömungswiderstand R für eine Position der Fixierungsnase am Rand der Dichtungsfläche 2, Position "B" in Figur 3. Die mittlere Kurve 26 zeigt den Strömungswiderstand R für die erfindungsgemäße Anordnung der Fixierungsnase 13, Position "C" in der Figur 3. Obwohl die Fixierungsnase 13, bezogen auf den Durchmesser D, nur um 8% gegenüber dem Mittelpunkt 9 versetzt ist, erhöht sich bei einem Gasfluss von 80 L/min der Strömungswiderstand R, gegenüber der Position der Fixierungsnase "B", nur um 0.6 mbar, während bei einer mittig positionierten Fixierungsnase, entsprechend Position "A", sich der Strömungswiderstand mehr als verdoppelt. FIG. 4 shows the flow resistance R as a function of the gas flow dV / dt through the directional valve 20. The abscissa shows the gas flow dV / dt in a range up to 160 L / min and plotted on the ordinate the flow resistance R as back pressure in a range up to 6 mbar. Curve 24 shows the flow resistance R as the first limit value for a fixing nose 13 positioned in the center 9, position "A" in FIG FIG. 3 , FIG. 4 FIG. 2 illustrates, as a second limit value, the flow resistance R for a position of the fixing nose on the edge of the sealing surface 2, position "B" in FIG FIG. 3 , The middle curve 26 shows the flow resistance R for the inventive arrangement of the fixing lug 13, position "C" in the FIG. 3 , Although the fixing nose 13 is offset by only 8% relative to the center 9 with respect to the diameter D, the flow resistance R increases with a gas flow of 80 L / min, compared with the position of the fixing nose "B", only by 0.6 mbar. while at a centrally positioned fixing nose, corresponding to position "A", the flow resistance more than doubled.

Eine geringfügige Verschiebung der Fixierungsnase 13 aus der Mitte heraus bewirkt bereits eine deutliche Absenkung des Strömungswiderstandes R.A slight displacement of the fixing nose 13 from the center already causes a significant reduction of the flow resistance R.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1.1.
Ventilsitzvalve seat
2.Second
Dichtungsflächesealing surface
3.Third
Öffnungopening
4.4th
Ventilkreuzvalve cross
5.5th
hochstehender Randupstanding edge
6.6th
Zentriervorsprungcentering
7.7th
Wulstbead
8.8th.
Unterseitebottom
9.9th
MittelpunktFocus
10.10th
Ventildeckelvalve cover
11.11th
Zentriernutcentering
12.12th
umlaufende Nutcircumferential groove
13.13th
Fixierungsnasefixation nose
14.14th
Ausströmöffnungenoutflow
15.15th
Ventilgehäusevalve housing
16.16th
Ventilmembranvalve membrane
20.20th
Richtungsventildirectional valve
22.22nd
Filtermaskefilter mask
24.24th
Kurve ACurve A
25.25th
Kurve BCurve B
26.26th
Kurve CCurve C

Claims (13)

Richtungsventil für eine Atemschutzmaske mit - einem Ventilgehäuse (15) und einem Ventilsitz (1) zur Aufnahme einer flexiblen Ventilmembran (16) mit einem Umfang U, der eine Gesamtfläche A, eine Umfangsfläche a und eine Längsachse D vorgibt, wobei der Ventilsitz (1) eine umlaufende und im wesentlichen eben ausgebildete Dichtungsfläche (2) aufweist, die eine Öffnung (3) umgibt und von zumindest Teilbereichen der Umfangsfläche a der Ventilmembran (16) während einer Einatmphase abdichtend abgedeckt wird, gekennzeichnet durch eine - am Ventilgehäuse (15) angeordnete Fixierungsnase (13) zur Fixierung der Ventilmembran (16) im Ventilsitz (1) und zur Unterstützung der Abdichtung der Dichtungsfläche (2) durch die Ventilmembran (16) während der Einatemphase, wobei die Fixierungsnase (13) derart zwischen dem Mittelpunkt der Fläche A der Ventilmembran (16) und dem Rand der Ventilmembran (16) angeordnet ist, dass in einer Ausatemphase sich die gesamte Umfangsfläche a der Ventilmembran (16) von der Dichtungsfläche (2) abhebt und sich ein gegenüber einer mittigen Anordnung der Fixierungsnase (13) geringerer Strömungswiderstand für ein Ausatemgas einstellt. Directional valve for a respirator with - A valve housing (15) and a valve seat (1) for receiving a flexible valve membrane (16) having a circumference U, which defines a total area A, a peripheral surface A and a longitudinal axis D, wherein the valve seat (1) has a circumferential and substantially just formed sealing surface (2) which surrounds an opening (3) and is sealingly covered by at least portions of the peripheral surface a of the valve membrane (16) during a Einatmphase, characterized by a - Fixierungsnase (13) arranged on the valve housing (15) for fixing the valve membrane (16) in the valve seat (1) and for supporting the sealing surface (2) by the valve membrane (16) during the inhalation phase, wherein the fixing nose (13) between the center of the surface A of the valve membrane (16) and the edge of the valve membrane (16) is arranged, that in an exhalation phase, the entire peripheral surface a of the valve membrane (16) from the sealing surface (2) and stands opposite to a central arrangement the fixing nose (13) sets lower flow resistance for an exhalation gas. Richtungsventil nach Anspruch 1, dadurch gekennzeichnet, dass die Fixierungsnase (13) gegenüber dem Mittelpunkt der Fläche A in einem Bereich zwischen 8% und 25% bezogen auf die Abmessung der Längsachse (D) der Ventilmembran (16) versetzt angeordnet ist.Directional valve according to claim 1, characterized in that the fixing lug (13) is offset relative to the center of the surface A in a range between 8% and 25% relative to the dimension of the longitudinal axis (D) of the valve membrane (16). Richtungsventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, das die Fixierungsnase (13) bezogen auf ihren Querschnitt Y-förmig ausgebildet ist.Directional valve according to claim 1 or 2, characterized in that the fixing nose (13) is Y-shaped with respect to its cross-section. Richtungsventil nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Fixierungsnase (13) mehrere Fixierungspunkte aufweist.Directional valve according to one or more of claims 1 to 3, characterized in that the fixing nose (13) has a plurality of fixing points. Richtungsventil nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Ventilmembran (16) kreisförmig ausgebildet ist und die Längsachse D der Durchmesser der Ventilmembran (16) ist.Directional valve according to one or more of claims 1 to 4, characterized in that the valve membrane (16) is circular and the longitudinal axis D is the diameter of the valve membrane (16). Atemschutzmaske mit einem Richtungsventil mit - einem Ventilgehäuse (15) und einem Ventilsitz (1) zur Aufnahme einer flexiblen Ventilmembran (16) mit einem Umfang U, der eine Gesamtfläche A, eine Umfangsfläche a und eine Längsachse D vorgibt, wobei der Ventilsitz (1) eine umlaufende und im wesentlichen eben ausgebildete Dichtungsfläche (2) aufweist, die eine Öffnung (3) umgibt und von zumindest Teilbereichen der Umfangsfläche a der Ventilmembran (16) während einer Einatmphase abdichtend abgedeckt wird, gekennzeichnet durch eine - am Ventilgehäuse (15) angeordnete Fixierungsnase (13) zur Fixierung der Ventilmembran (16) im Ventilsitz (1) und zur Unterstützung der Abdichtung der Dichtungsfläche (2) durch die Ventilmembran (16) während der Einatemphase, wobei die Fixierungsnase (13) derart zwischen dem Mittelpunkt der Fläche A der Ventilmembran (16) und dem Rand der Ventilmembran (16) angeordnet ist, dass in einer Ausatemphase sich die gesamte Umfangsfläche a der Ventilmembran (16) von der Dichtungsfläche (2) abhebt und sich ein gegenüber einer mittigen Anordnung der Fixierungsnase (13) geringerer Strömungswiderstand für ein Ausatemgas einstellt. Respirator with a directional valve with - A valve housing (15) and a valve seat (1) for receiving a flexible valve membrane (16) having a circumference U, which defines a total area A, a peripheral surface A and a longitudinal axis D, wherein the valve seat (1) has a circumferential and substantially just formed sealing surface (2) which surrounds an opening (3) and is sealingly covered by at least portions of the peripheral surface a of the valve membrane (16) during a Einatmphase, characterized by a - Fixierungsnase (13) arranged on the valve housing (15) for fixing the valve membrane (16) in the valve seat (1) and for supporting the sealing surface (2) by the valve membrane (16) during the inhalation phase, wherein the fixing nose (13) between the center of the surface A of the valve membrane (16) and the edge of the valve membrane (16) is arranged, that in an exhalation phase, the entire peripheral surface a of the valve membrane (16) from the sealing surface (2) and stands opposite to a central arrangement the fixing nose (13) sets lower flow resistance for an exhalation gas. Atemschutzmaske mit einem Richtungsventil nach Anspruch 6, dadurch gekennzeichnet, dass die Fixierungsnase (13) gegenüber dem Mittelpunkt der Fläche A in einem Bereich zwischen 8% und 25% bezogen auf die Abmessung der Längsachse (D) der Ventilmembran (16) versetzt angeordnet ist.Respiratory mask with a directional valve according to claim 6, characterized in that the fixing nose (13) is offset relative to the center of the surface A in a range between 8% and 25% relative to the dimension of the longitudinal axis (D) of the valve membrane (16). Atemschutzmaske mit einem Richtungsventil nach Anspruch 6 oder 7, dadurch gekennzeichnet, das die Fixierungsnase (13) bezogen auf ihren Querschnitt Y-förmig ausgebildet ist.Respiratory mask with a directional valve according to claim 6 or 7, characterized in that the fixing nose (13) is Y-shaped with respect to its cross-section. Atemschutzmaske mit einem Richtungsventil nach einem oder mehreren der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass die Fixierungsnase (13) mehrere Fixierungspunkte aufweist.Respiratory mask with a directional valve according to one or more of claims 6 to 8, characterized in that the fixing nose (13) has a plurality of fixing points. Atemschutzmaske mit einem Richtungsventil nach einem oder mehreren der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass die Ventilmembran (16) kreisförmig ausgebildet ist und die Längsachse D der Durchmesser der Ventilmembran (16) ist.Respiratory mask with a directional valve according to one or more of claims 6 to 9, characterized in that the valve membrane (16) is circular and the longitudinal axis D is the diameter of the valve membrane (16). Richtungsventil für eine Atemschutzmaske mit - einem Ventilgehäuse (15), - einer flexiblen Ventilmembran (16), - einem mit der Ventilmembran (16) kooperierenden Ventilsitz (1), welcher eine ebene Dichtungsfläche (2) aufweist, die eine Öffnung (3) umgibt und welcher einen, von der Dichtungsfläche (2) hochstehenden, seitlichen Rand (5) hat, der die Ventilmembran (16) aufnimmt, - einer außermittig zur Ventilmembran (16) angeordneten Fixierungsnase (13), die am Ventilgehäuse (15) befestigt ist und deren Abmessungen zur Fixierung der Ventilmembran (16) gegenüber der Dichtungsfläche (2) des Ventilsitzes (1) ausgebildet sind, wobei das Maß des außermittigen Versatzes (x) so bemessen ist, dass die Ventilmembran (16) in einer Ausatemphase über den gesamten Umfang der Dichtungsfläche (2) abhebt. Directional valve for a respirator with a valve housing (15), a flexible valve membrane (16), a valve seat (1) cooperating with the valve membrane (16), having a flat sealing surface (2) surrounding an opening (3) and having a lateral edge (5) upstanding from the sealing surface (2) receives the valve membrane (16), - An eccentric to the valve diaphragm (16) arranged Fixierungsnase (13) which is fixed to the valve housing (15) and whose dimensions for fixing the valve membrane (16) relative to the sealing surface (2) of the valve seat (1) are formed, wherein the measure of eccentric offset (x) is dimensioned so that the valve membrane (16) in an exhalation phase over the entire circumference of the sealing surface (2) lifts. Atemschutzmaske mit einem Richtungsventil, welches aufweist - ein Ventilgehäuse (15), - eine flexible Ventilmembran (16), - einen mit der Ventilmembran (16) kooperierenden Ventilsitz (1), welcher eine ebene Dichtungsfläche (2) aufweist, die eine Öffnung (3) umgibt und welcher einen, von der Dichtungsfläche (2) hochstehenden, seitlichen Rand (5) hat, der die Ventilmembran (16) aufnimmt, - eine außermittig zur Ventilmembran (16) angeordneten Fixierungsnase (13), die am Ventilgehäuse (15) befestigt ist und deren Abmessungen zur Fixierung der Ventilmembran (16) gegenüber der Dichtungsfläche (2) des Ventilsitzes (1) ausgebildet sind, wobei das Maß des außermittigen Versatzes (x) so bemessen ist, dass die Ventilmembran (16) in einer Ausatemphase über den gesamten Umfang der Dichtungsfläche (2) abhebt. Respiratory mask with a directional valve, which has a valve housing (15), a flexible valve membrane (16), - One with the valve membrane (16) cooperating valve seat (1), which has a flat sealing surface (2) surrounding an opening (3) and which has a, of the sealing surface (2) upstanding, lateral edge (5) receives the valve membrane (16), - An off-center to the valve diaphragm (16) arranged Fixierungsnase (13) which is fixed to the valve housing (15) and whose dimensions to Fixing the valve membrane (16) relative to the sealing surface (2) of the valve seat (1) are formed, wherein the dimension of the eccentric offset (x) is dimensioned so that the valve membrane (16) in an exhalation phase over the entire circumference of the sealing surface (2 ) takes off. Vorrichtung nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass der außermittige Versatz (x) in einem Bereich zwischen 8% und 15% der Achsenlänge (D) der größten Längserstreckung der Ventilmembran (16) liegt, x/D= 8% - 15%.Apparatus according to claim 11 or 12, characterized in that the off-center offset (x) is in a range between 8% and 15% of the axial length (D) of the greatest longitudinal extent of the valve membrane (16), x / D = 8% - 15% ,
EP12156933.9A 2011-09-17 2012-02-24 Directional valve and respirator mask with a directional valve Active EP2570156B1 (en)

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DE102012018277B4 (en) * 2012-09-14 2020-08-06 Dräger Safety AG & Co. KGaA Directional valve and respirator with one directional valve
CN105722558B (en) 2013-11-15 2019-06-07 3M创新有限公司 The respirator of outlet valve with the installation of non-circular mass center
AU358644S (en) * 2014-05-08 2014-11-10 Innosparks Pte Ltd Unidirectional valve on face mask
DE102022113700A1 (en) 2022-05-31 2023-11-30 Dräger Safety AG & Co. KGaA Valve arrangement for a respiratory mask

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DE102011113716A1 (en) 2013-03-21
CN102989093A (en) 2013-03-27
US9808657B2 (en) 2017-11-07
US20130068232A1 (en) 2013-03-21
EP2570156A3 (en) 2015-08-05
EP2570156B1 (en) 2018-07-11
CN102989093B (en) 2015-06-17

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