EP1606561A2

EP1606561A2 - Louver blades assembling and louver frame for outdoor unit of air conditioner

Info

Publication number: EP1606561A2
Application number: EP04714972A
Authority: EP
Inventors: In-Gyu Kim; Ja-Hyung Koo; Byung-Il Park; Yang-Ho Kim; Young-Ho Hong; Kyeong-Wook Heo; Si-Kyong Sung; Dong-Hyuk Lee; Tae-Geun Kim
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2003-02-26
Filing date: 2004-02-26
Publication date: 2005-12-21
Also published as: WO2004076940A2; WO2004076940A3

Abstract

The present invention relates to a louver blades assembling and a louver frame (104, 106) for an outdoor unit of an air conditioner which can install a built-in type outdoor unit in an opened space for sucking/discharging air on outer wall (102) of a building, by installing an internal frame (106) on which louver blades (108) are rotatably installed in the opened space. The louver blades are easily inseparably installed on the internal frame, to improve reliability in the operation. The shape of the louver blades is charged to improve air blast efficiency and heat exchange efficiency. The internal frame on which the louver blades are mounted is easily installed in the opened space for sucking/discharging air on the outer wall of the building. As a result, the assembly process is simplified and the assembly time is reduced, to improve production efficiency.

Description

LOUVER BLADES ASSEMBLING AND LOUVER FRAME FOR OUTDOOR UNIT OF AIR CONDITIONER

TECHNICAL FIELD

The present invention relates to a louver blades assembling and a louver frame for an outdoor unit of an air conditioner which can install a built-in type outdoor unit in an opened space for sucking/discharging air on an outer wall of a building, by easily installing an internal frame in the opened space without separating louver blades.

BACKGROUND ART

In general, an air conditioner is classified into a split type air conditioner in which an indoor unit and an outdoor unit are split and individually installed in an inside space and an outside space, and a window type air conditioner in which an indoor unit and an outdoor unit are combined into one device and installed through a window or wall. The indoor unit and the outdoor unit are increased in size due to high cooling or heating capacity, and serious vibrations are generated in the outdoor unit due to the operation of a compressor of the outdoor unit. Accordingly, the split type air conditioner has been more popularly used than the window type air conditioner.

The split type air conditioner includes an indoor unit installed indoors, for exchanging heat between low temperature low pressure gas refrigerants and air, and supplying warm or cool air into the air conditioned space, and an outdoor unit installed outdoors, for compressing, condensing and expanding the refrigerants to facilitate the heat exchange in the indoor unit. The indoor unit and the outdoor unit are coupled to each other through refrigerant pipe lines. Here, the indoor unit includes an indoor casing on which a suction hole and a discharge hole for sucking/discharging indoor air are formed, an evaporator installed inside the indoor casing, for exchanging heat between low temperature low pressure refrigerants and air, and an indoor fan and a motor installed at one side of the evaporator, for supplying indoor air to the evaporator so that cool air can be re-discharged to the inside.

In addition, the outdoor unit includes an outdoor casing on which a suction hole and a discharge hole for sucking/discharging outdoor air are formed, a compressor installed inside the outdoor casing, for compressing the refrigerants supplied from the evaporator into high temperature high pressure gas refrigerants, a condenser for condensing the refrigerants s upplied from the compressor into mesothermal high pressure liquid refrigerants by exchanging heat between the refrigerants and outdoor air, an expansion means such as a capillary tube or electronic expansion valve for decompressing the refrigerants supplied from the condenser into low temperature low pressure gas refrigerants, and an outdoor fan and a motor installed at one side of the condenser, for supplying outdoor air to the condenser.

The compressor, the condenser, the expansion means and the evaporator are coupled to each other through the refrigerant pipe lines, so that the refrigerants can be circulated to be sequentially compressed, condensed, expanded and evaporated.

However, the conventional outdoor unit for the air conditioner is restricted in installation spaces due to high density and strict environment regulations of cities, and increases civil applications due to noise and heat. Especially, in a common residential area such as large-scaled apartment buildings, the outdoor units must be installed in indoor verandas to improve the appearance and prevent noise. In order to solve the foregoing problems, Japanese Laid-Open Patent Application 6-101873 suggests an air conditioner mounted building where an indoor unit of an air conditioner is installed indoors or adjacent to a room intended to be air-conditioned, and an outdoor unit of the air conditioner is installed outdoors, wherein an opening is formed on the outer wall or roof, a louver is installed in the opening, the outdoor unit of the air conditioner is disposed in the louver, and suction/discharge of the indoor unit is performed through a gap between louver plates.

In addition, Japanese Laid-Open Patent Application 3-213928 discloses a built-in type outdoor unit for an air conditioner including an outdoor unit main body for the air conditioner which is built in the wall and which includes a frame having the same size a nd thickness as the wall, a s uction h ole for h eat exchange a ir installed on the same surface as the outdoor unit main body, and a discharge hole for heat exchanged air. Figs. 1 to 3 are a perspective view, a disassembly perspective view and a plane-sectional view illustrating a conventional louver blades assembling for a n outdoor unit of an air conditioner, and Figs. 4a and 4b are side-sectional views illustrating an open/close state of louver blades for the outdoor unit of the air conditioner. The conventional l ouver blades assembling which can be applied to the mounting structure of the outdoor unit of the air conditioner will now be described with reference to Figs. 1 to 3.

An external frame 4 and an internal frame 6 are fixedly installed in an opened space on an outer wall, and a plurality of louver blades 8 are rotatably installed inside the internal frame 6. A plurality of assembly grooves 8h are formed at the centers of both ends of the louver blades 8, and a plurality of assembly holes 6h are formed on both sides of the internal frame 6 in the longitudinal direction. When the assembly grooves 8h of the louver blades 8 are positioned inside the assembly holes 6h of the internal frame 6, rotary axes 72 are coupled from the outside of the internal frame 6 and a driving means is installed. Here, the louver blades 8 are formed in a plate shape. The assembly grooves 8h are formed at the centers of both ends of the louver blades 8, so that both ends of the louver blades 8 can be rotatably installed on the inside surface of the internal frame 6 fixed in the opened space on the outer wall.

Because the assembly grooves 8h are formed at the centers of the louver blades 8 in the longitudinal direction, the centers of the louver blades 8 are protruded.

The front surfaces and the rear surfaces of the louver blades 8 are vertical to each other, and the rear surfaces of the upper and lower ends 8a and 8b of the louver blades 8 are sloped. Accordingly, even if the louver blades 8 are rotated in a stacked state, the upper and lower ends 8a and 8b of the adjacent louver blades 8 do not interfere with each other.

The driving means is comprised of rotary links 74 having assembly protrusions 74a at the centers of their one-side surfaces to be inserted into the assembly grooves 8h of the louver blades 8 through the rotary axes 72, and also having a pair of hooks 74b at both sides of their one-side surfaces, a pair of lifting/lowering levers 75 and 76 for coupling the hooks 74b formed at both ends of the rotary links 74, respectively, and a driving motor 80 for rotatably driving a connector 78 connected to one of the rotary links 74.

A through hole 78h is formed in the connector 78, so that the connector 78 can be connected to surround the circumference of the rotary link 74. The connector 78 can be directly driven by the user, or connected to the driving motor 80.

The driving means further includes limit switches 91 and 92 for controlling power supplied to the driving motor 80, so that the driving motor 80 can rotate the louver b lades 8 within a preset a ngle range. T he limit switches 91 and 92 a re installed on the internal frame 6 to be adjacent to the upper and lower ends of one of the pair of lifting/lowering levers 75 and 76.

Accordingly, when the driving motor 80 is operated to enable the louver blades 8 to open the opened space, the pair of lifting/lowering levers 75 and 76 and the rotary links 74 coupled to the lifting/lowering levers 75 and 76 are rotated due to the operation of the driving motor 80. At the same time, one lifting/lowering lever 75 or 76 is downwardly moved and the other lifting/lowering lever 75 or 76 is upwardly moved to interlock the whole rotary links 74. The louver blades 8 are operated to open the opened space due to the rotation of the rotary links 74.

When the louver blades 8 are opened over the preset angle, the pair of lifting/lowering levers 75 and 76 are vertically moved within a predetermined range to contact the limit switches 91 and 92, and the limit switches 91 and 92 generate contact point signals not to supply power to the driving motor 80. When the louver blades 8 are closed, the same operation is performed.

As described above, when the driving motor 80 is operated, the driving force is transmitted to the louver blades 8 through the rotary links 74, the lifting/lowering levers 75 and 76 and the connector 78. As shown in Figs. 4a and 4b, the louver blades 8 are rotated on the internal frame 6 to open/close the opened space.

Here, predetermined gaps S are maintained between the adjacent louver blades 8. Although the louver blades 8 close the opened space, the louver blades 8 do not interfere with each other during the open/close operation. In the conventional louver blades assembling for the outdoor unit of the air conditioner, the assembly protrusions 74a of the rotary links 74 are inserted into the assembly grooves 8 h of the louver b lades 8 , a nd o ne of the rotary links 74 i s inserted into the through hole 78h of the connector 78. If an external impact is generated during the operation, the louver blades 8, the rotary links 74 and the connector 78 may be disconnected from each other, and thus the louver blades 8 may be separated from the internal frame 6, which reduces reliability in the operation.

In addition, in the conventional louver blades assembling for the outdoor unit of the air conditioner, when the assembly grooves 8h of the louver blades 8 are positioned inside the assembly holes 6h of the internal frame 6, the rotary axes 72 are inserted from the outside of the assembly holes 6h of the internal frame 6, and the assembly protrusions 74a of the rotary links 74 are inserted into the assembly grooves 8h of the louver blades 8 through the rotary axes 72 from the outside of the assembly holes 6h of the internal frame 6. Therefore, the assembly process is complicated, the assembly time is increased, and production efficiency is reduced.

In the conventional louver blades assembling for the outdoor unit of the air conditioner, the pair of limit switches 91 and 92 are installed to intercept power supplied to the driving motor 80, when the louver blades 8 are completely closed or opened at the preset angle. That is, the louver blades 8 are electronically controlled by the limit switches 91 and 92 to be operated within the preset angle range. If the limit switches 91 and 92 are out of order, the louver blades 8 are excessively closed or opened, to reduce reliability in the operation.

In the conventional louver blades assembling for the outdoor unit of the air conditioner, the louver blades 8 are formed in a plate shape. Accordingly, when the louver blades 8 are operated to close the opened space, horizontal gaps S are formed between the adjacent louver blades 8. Rain drops or dusts are inputted into the outdoor unit through the gaps S, thereby damaging components such as a compressor and a condenser. Moreover, the inside components of the outdoor unit are shown through the gaps S between the louver blades 8, which defiles the appearance of the outdoor unit.

However, the conventional arts relate merely to technologies for inserting the outdoor unit into the space formed on the outer wall of the building. That is, the outdoor unit increased in volume and weight due to high air conditioning capacity cannot be actually installed in a built-in type.

DISCLOSURE OF THE INVENTION

The present invention is achieved to solve the above problems. An object of the present invention is to provide a louver blades assembling for an outdoor unit of an air conditioner which can prevent a plurality of louver blades installed on an internal frame installed on an inner wall of an opened space on an outer wall of a building from being easily separated, when impacts are applied to the louver blades and components for interlocking the louver blades.

Another object of the present invention is to provide a louver blades assembling for an outdoor unit of an air conditioner which can easily install a plurality of louver blades and components for interlocking the louver blades on an internal frame installed on an inner wall of an opened space on an outer wall of a building.

Yet another object of the present invention is to provide a louver blades assembling for an outdoor unit of an air conditioner which can improve reliability in the operation of a plurality of louver blades, by mechanically controlling the louver blades to be rotated within a preset angle range on an internal frame installed on an inner wall of an opened space on an outer wall of a building.

Yet another object of the present invention is to provide a louver blades assembling for an outdoor unit of an air conditioner which can prevent alien substances such as raindrops or dusts from being inputted into the outdoor unit between adjacent louver blades when the louver blades are closed, by changing the shape of the louver blades.

Yet another object of the present invention is to provide a louver frame for an outdoor unit of an air conditioner which can build the outdoor unit in an outer wall of a commercial and/or residential building, and install the large capacity outdoor unit increased in size due to high air conditioning capacity in a built-in type.

In order to achieve the above-described objects of the invention, there is provided a louver blades assembling for an outdoor unit of an air conditioner, including: an internal frame installed on an inner wall of an opened space on an outer wall of a building; a plurality of louver blades rotatably installed on the inside surface of the internal frame, for opening/closing the opened space by^' rotation; rotary links screw-fastened to the centers of both ends of each louver blade; and a pair of lifting/lowering levers for interlocking the rotary links by coupling one-side ends and the other-side ends of each rotary link, respectively.

Preferably, the louver blades assembling further includes a driving motor for rotatably driving a connector connected to one of the rotary links. A pair of fastening bosses are formed on the rotary I inks so that the rotary I inks can be selectively screw-fastened to the connector. Both ends of the rotary links are calk-coupled to the pair of lifting/lowering levers.

Preferably, caps are installed between the louver blades and the rotary links, assembly protrusions inserted into assembly grooves formed at the centers of both ends of the louver blades are formed on one-side surfaces of the caps, and fixing protrusions screw-fastened to the rotary links are formed on the rear surfaces of the caps.

Preferably, assembly guides protruded in the assembly protrusion direction are formed on the circumferences of vertical cap surfaces formed to pass between the assembly protrusions and the fixing protrusions. The assembly guides of the caps are installed to surround the ends of the louver blades when the caps and the louver blades are assembled.

Preferably, a pair of reinforcing ribs are installed long on the louver blades in the longitudinal direction vertically to the inside of hollow blade shape louver main bodies. More preferably, the assembly grooves of the louver blades are surrounded by the louver main bodies and the pair of reinforcing ribs.

Preferably, fixing grooves are formed at the centers of one-side surfaces of the rotary links, so that the fixing protrusions of the caps can be inserted into the fixing grooves, and screw grooves are formed at the centers of the rear surfaces of the rotary links, so that the fixing protrusions of the caps can be screw-coupled to the screw grooves.

Preferably, rotation preventing straight line units are formed on part of the fixing protrusions of the caps, and rotation preventing straight line units are formed on part of the fixing grooves of the rotary links, for preventing the fixing protrusions of the caps and the fixing grooves of the rotary links from being rotated together, when they are assembled.

Preferably, a pair of guide rails are formed long on the inside surface of the internal frame in the longitudinal direction, and a plurality of holes are formed between the guide rails in the longitudinal direction at a predetermined interval. In the louver blade assembly bodies including the louver blades, the caps having their assembly protrusions inserted into the assembly grooves of the louver blades, and plates having assembly holes which the fixing protrusions of the caps are inserted into, the plates are stacked between the guide rails, so that the fixing protrusions can be positioned inside the holes of the internal frame. The rotary links are screw-fastened to the fixing protrusions of the caps from the outside of the internal frame.

Preferably, excessive rotation preventing means are formed in adjacent parts between the caps and the plates, for preventing the louver blades from being rotated over the preset angle.

More preferably, the excessive rotation preventing means include rotation preventing ribs protruded from the centers of the plates in the longitudinal direction, excessive closing preventing ribs formed long in the longitudinal direction at the upper sides of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being engaged with the upper sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades completely close the opened space, a nd excessive opening preventing ribs formed on the circumferences of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being supported by the lower sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades open the opened space at the preset angle. In the louver blades assembling, an external frame is fixedly installed to contact the inner wall of the opened space on the outer wall of the building, and a system I ouver i n w hich the I ouver b lades are mounted o n t he internal frame is fixedly installed on the external frame.

According to another aspect of the invention, a louver blades assembling for an outdoor unit of an air conditioner includes: an internal frame installed on an inner wall of an opened space on an outer wall of a building, a pair of guide rails being formed long on the inside surface of the internal frame in the longitudinal direction; a plurality of louver blades rotatably installed on the inside surface of the internal frame, for opening/closing the opened space by rotation; assembly means inserted into assembly grooves formed at the centers of both ends of each louver blade, for stacking the louver blades between the guide rails; and a driving means installed outside the internal frame to be coupled to the assembly means, for rotatably driving the louver blades.

Preferably, the assembly means includes caps having assembly protrusions on their one-side surfaces to be inserted into the assembly grooves of each louver blade, and having fixing protrusions on their rear surfaces, plates having assembly holes at their centers so that the fixing protrusions of the caps can be inserted into the assembly holes, and having their both ends inserted between the guide rails, and a plurality of holes formed on the internal frame in the longitudinal direction at a predetermined interval, so that the louver blade assembly bodies including the louver blades, the caps and the plates can be rotatably coupled to the driving means on the internal frame.

Preferably, the driving means includes a plurality of rotary links screw-fastened to the fixing protrusions of the caps from the outside of the internal frame, a pair of lifting/lowering levers for interlocking the rotary links by coupling one-side ends and the other-side ends of each rotary link, respectively, and a driving motor for rotatably driving a connector connected to one of the rotary links. Preferably, a pair of fastening bosses are formed on the rotary links so that the rotary links can be selectively screw-fastened to the connector, and both ends of the rotary links are calk-coupled to the pair of lifting/lowering levers.

Preferably, excessive rotation preventing means are formed in adjacent parts between the caps and the plates, for preventing the louver blades from being rotated over a preset angle.

More preferably, the excessive rotation preventing means include rotation preventing ribs protruded from the centers of the plates in the longitudinal direction, excessive closing preventing ribs formed long in the longitudinal direction at the upper sides of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being engaged with the upper sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades completely close the opened space, a nd excessive opening preventing ribs formed on the circumferences of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being supported by the lower sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades open the opened space at the preset angle.

In the louver blades assembling, an external frame is fixedly installed to contact the inner wall of the opened space on the outer wall of the building, and a system I ouver i n w hich the I ouver b lades are mounted o n the internal frame is fixedly installed on the external frame. According to yet another aspect of the invention, a louver blades assembling for an outdoor unit of an air conditioner i ncludes: an i nternal frame installed on an inner wall of an opened space on an outer wall of a building, a pair of guide rails being formed long on the inside surface of the internal frame in the longitudinal direction; a plurality of louver blades rotatably installed on the inside surface of the internal frame, for opening/closing the opened space by rotation; caps having assembly protrusions at the centers of their one-side surfaces to be inserted into the assembly grooves formed at the centers of both ends of each louver blade, and having fixing protrusions at the centers of their rear surfaces; plates having assembly holes at their centers so that the fixing protrusions of the caps can be inserted into the assembly holes, and having their both ends inserted between the guide rails; a driving means installed outside the internal frame to be coupled to the fixing protrusions of the caps, for rotatably driving the louver blades; and excessive rotation preventing means formed in adjacent parts between the caps and the plates, for preventing the louver blades from being rotated over a preset angle.

Preferably, assembly guides protruded in the assembly protrusion direction are formed on the circumferences of vertical cap surfaces formed to pass between the assembly protrusions and the fixing protrusions. The assembly guides of the caps are installed to surround the ends of the louver blades when the caps and the louver blades are assembled. Preferably, the excessive rotation preventing means include rotation preventing ribs protruded from the centers of the plates in the longitudinal direction, excessive closing preventing ribs formed long in the longitudinal direction at the upper sides of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being engaged with the upper sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades completely close the opened space, a nd excessive opening preventing ribs formed on the circumferences of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being supported by the lower sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades open the opened space at the preset angle.

In the louver blades assembling, an external frame is fixedly installed to contact the inner wall of the opened space on the outer wall of the building, and a system louver i n which the l ouver blades are mounted o n the internal frame is fixedly installed on the external frame.

According to yet another aspect of the invention, there is provided a louver blades assembling for an outdoor unit of an air conditioner including a plurality of louver blades stacked and rotatably installed on an internal frame on an inner wall of an opened space on an outer wall of a building, for opening/closing the opened space and guiding an air flow, wherein each of the louver blades includes a hollow blade shape louver main body having its upper end upwardly sloped to its front surface and its lower end downwardly sloped to its rear surface, and at least one reinforcing rib formed inside the louver main body, for reinforcing intensity of the louver main body.

Preferably, assembly grooves are formed at both ends of the louver main bodies, so that the l ouver main bodies can be rotatably coupled to the i nternal frame. The assembly grooves are surrounded by the louver main bodies and the pair of reinforcing ribs formed long inside the louver main bodies in the longitudinal direction.

Preferably, the front surfaces of the louver blades are vertical, the rear surfaces of the louver blades are outwardly protruded toward the centers. The upper ends of the louver blades are positioned to have upwardly-sloped gaps from the lower ends of the louver blades disposed in the upper sides, and the lower ends of the louver blades are positioned to have upwardly-sloped gaps from the upper ends of the louver blades disposed in the lower sides.

Preferably, the louver blades are rotated at a preset angle with their upper ends facing their rear surfaces when opening the opened space, and rotated with their upper ends facing their front surfaces when closing the opened space.

According to yet another aspect of the invention, a louver frame for an outdoor unit of an air conditioner includes: an external frame fixed in an opened space on an outer wall of a building by using a fastening means; and an internal frame being fixedly coupled to the external frame on the rear surface of the external frame, separating a suction area from a discharge area, and having a plurality of louver blades in each area. Preferably, the louver frame further includes a median separator coupled to cross the internal frame, for separating the suction area from the discharge area in the lower and upper sides.

Preferably, the external frame is formed in a rectangular frame shape, and has its upper, lower and both side ends fixed in the opened space on the outer wall of the building by using anchor bolts.

Preferably, the external frame has a section of '^~r, and a plurality of intensity reinforcing ribs are formed inside the external frame, for reinforcing intensity.

Preferably, the internal frame is screw-fastened and coupled to the external frame.

Preferably, the internal frame has a section of 'L-', and a plurality of intensity reinforcing ribs are formed inside the internal frame, for reinforcing intensity.

Preferably, the front surface of the median separator is vertical, the lower end of the median separator is upwardly sloped from the front to rear surface to guide a flow of air sucked to the suction area, and the upper end of the median separator is horizontal to prevent a flow of air discharged from the discharge area from being re-sucked to the suction area.

Preferably, a sealing member is adhered to the circumference of the rear surface of the internal frame, and the outdoor unit is closely installed from the rear surface of the internal frame to contact the sealing member.

Preferably, a pair of installation guide ribs are formed on the circumference of the rear surface of the internal frame, so that the sealing member can be stably positioned thereon.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become better understood with reference to the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein;

Fig. 1 is a perspective view illustrating a conventional louver blades assembling for an outdoor unit of an air conditioner;

Fig. 2 is a perspective view illustrating disassembly of the conventional louver blades assembling for the outdoor unit of the air conditioner;

Fig. 3 is a plane-sectional view illustrating the conventional louver blades assembling for the outdoor unit of the air conditioner; Figs. 4a and 4b are side-sectional views illustrating an open/close state of louver blades for the outdoor unit of the air conditioner; Fig. 5 is a partially-cut perspective view illustrating a mounting structure of an outdoor unit of an air conditioner in accordance with the present invention;

Fig. 6 is a perspective view illustrating disassembly of an installation and coupling structure of the outdoor unit of the air conditioner of Fig. 5; Fig. 7 is a perspective view illustrating a louver blades assembling for the outdoor unit of the air conditioner in accordance with the present invention;

Fig. 8 is a perspective view illustrating disassembly of the louver blades assembling for the outdoor unit of the air conditioner in accordance with the present invention; Fig. 9 is a plane-sectional view illustrating the louver blades assembling for the outdoor unit of the air conditioner in accordance with the present invention;

Fig. 10 is a perspective view illustrating disassembly of a louver blade assembly body and rotary links for the outdoor unit of the air conditioner in accordance with the present invention; Fig. 11 is a perspective view illustrating a louver blade for the outdoor unit of the air conditioner in accordance with the present invention;

Fig. 12 is a perspective view illustrating disassembly of an excessive rotation preventing means for rotating the louver blades for the outdoor unit of the air conditioner to be rotated within a preset angle range in accordance with the present invention;

Figs. 13a to 13d are perspective views illustrating the louver blades assembling for the outdoor unit of the air conditioner in accordance with the present invention;

Fig. 14 is a plane-sectional view illustrating a louver frame assembling for the outdoor unit of the air conditioner in accordance with the present invention;

Figs. 15a and 15b are operation state views illustrating a state where the louver blades for the outdoor unit of the air conditioner are rotated within the preset angle range in accordance with the present invention; and

Figs. 16a and 16b are operation state views illustrating a state where caps coupled to the louver blades for the outdoor unit of the air conditioner are rotated within the preset angle range in accordance with the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

A louver blades assembling and a louver frame for an outdoor unit of an air conditioner in accordance with the present invention will now be described in detail with reference to the accompanying drawings.

Fig. 5 is a partially-cut perspective view illustrating a mounting structure of the outdoor unit of the air conditioner in accordance with the present invention, and Fig. 6 is a perspective view illustrating disassembly of an installation and coupling structure of the outdoor unit of the air conditioner of Fig. 5. The mounting structure of the outdoor unit of the air conditioner using the louver blades assembling for the outdoor unit of the air conditioner in accordance with the present invention will now be explained with reference to Figs. 5 and 6. An external frame 104 is fixedly installed on an inner wall of a rectangular space formed on an outer wall 102 of a residential and/or commercial building, and an internal frame 106 is fixedly installed inside the external frame 104. An inside area of the internal frame 106 is divided into a suction area 107a and a discharge area 107b. A plurality of louver blades 108 are installed in the suction area 107a and the discharge area 107b, so that air can be sucked or discharged through gaps between the louver blades 108. The outdoor unit includes an outdoor unit casing 10 fixedly installed inside the outer wall 102 of the building to contact the external frame 1 04 a nd/or the internal frame 106. A suction unit 11a and a discharge unit 11b are individually formed on one surface of the outdoor unit casing 10 contacting the suction area 107a and the discharge area 107b of the internal frame 106.

A sealing member S is installed between the outdoor unit and the internal frame 106, for preventing leakage of blasted air by adhering the outdoor unit to the internal frame 106. The sealing member S is fixedly installed on the circumference of the rear surface of the internal frame 106, and the outdoor unit is adhered to the sealing member S from the rear surface of the internal frame 106.

Here, a compressor (not shown) for compressing refrigerants supplied from an evaporator into high temperature high pressure gas refrigerants, and a condenser 30 for condensing the refrigerants supplied from the compressor into mesothermal high pressure liquid refrigerants by exchanging heat between the refrigerants and outdoor air are installed in the suction unit 11a. As publicly known, the condenser 30 is formed by installing a plurality of refrigerant pipe lines vertically between a plurality of fins in a zigzag shape.

A cooling fan 40 for supplying outdoor air sucked through the suction area 107a to the condenser 30, and discharging heat-exchanged air through the discharge area 107b is fixedly installed in the discharge unit 11 b. One example of the cooling fan 40 is a sirocco fan. A control box 50 for controlling the operation of the outdoor unit is installed on the rear surface of the outdoor unit. The control box 50 controls opening/closing of the louver blades 108.

Figs. 7 to 9 are a perspective view, a disassembly perspective view and a plane-sectional view illustrating the louver blades assembling for the outdoor unit of the air conditioner in accordance with the present invention, Fig. 10 is a perspective view illustrating disassembly of a louver blade assembly body and rotary links for the outdoor unit of the air conditioner in accordance with the present invention, Fig. 11 is a perspective view illustrating the louver blade for the outdoor unit of the air conditioner in accordance with the present invention, and Fig. 12 is a perspective view illustrating disassembly of an excessive rotation preventing means for rotating the louver blades for the outdoor unit of the air conditioner to be rotated within a preset angle range in accordance with the present invention.

In detail, as illustrated in Figs. 7 to 10, the louver blades assembling for the outdoor unit of the air conditioner includes the internal frame 106 fixedly installed inside the external frame 104, and divided into the suction area 107a and the discharge area 107b, a pair of guide rails 106a and 106b being formed long on the inside surface of the internal frame 106 in the longitudinal direction, the plurality of louver blades 108 rotatably installed on the inside surface of the internal frame 106, for opening/closing the suct :iion area 107a and the discharge area 107b by rotation, assembly means inserted into assembly grooves 108h formed at the centers of both ends of each louver blade 108, for stacking the louver blades 108 between the guide rails 106a and 106b, rotary links 124 screw-fastened B to the centers of both ends of each louver blade 108 from the outside of the internal frame 106, and a pair of lifting/lowering levers 122 and 123 for interlocking the rotary links 124 by coupling one-side ends and the other-side ends of each rotary link 124, respectively.

The louver blades assembling for the outdoor unit further includes a driving motor 128 for rotatably driving a connector 126 connected to one of the rotary links 124. Instead of using the driving motor 128, the user can directly move the connector 126 to open/close the louver blades 108 at an appropriate angle. The external frame 104 is formed in a rectangular shape by coupling four frames having a section of 'π' to each outer by brackets bent at the edges of the frames. The upper, lower and both side ends of the external frame 104 are fixedly installed on the circumference of the inner wall of the space formed on the outer wall 102 of the building by using anchor bolts A B.

The external frame 104 is formed by coupling the same shape of four frames to each other. Here, the front surface of the external frame 104 is installed toward the outside of the building, and the both sides, the top surface and the bottom surface of the external frame 104 are closely adhered to the inner wall of the space on the outer wall 102 of the building. A plurality of intensity reinforcing ribs 104L are inwardly protruded among the front surface, the both sides, the top surface and the bottom surface of the external frame 104.

The internal frame 106 is formed in a rectangular shape by coupling four frames having a section of 'i-' to each outer by brackets bent at the edges of the frames. The internal frame 106 is screw-coupled S to the external frame 104 on the rear surface of the external frame 104. Here, the two frames compose the upper and lower ends of the internal frame 106, and different shape of frames compose the both side ends of the internal frame 106. The pair of guide rails 106a and 106b are formed in the centers of the frames composing the both s ide ends, and a plurality of holes 106h are formed between the guide rails 106a and 106b. In addition, the internal frame 106 is installed inside the external frame 104, so that the rear surface of the internal frame 106 can face the front surface of the external frame 104 at a predetermined interval, and that the both sides, the top surface and the bottom surface of the internal frame 106 can face the both sides, the top surface and the bottom surface of the external frame 104 at a predetermined interval. A plurality of intensity reinforcing ribs 106L are outwardly protruded among the rear surface, the both sides, the top surface and the bottom surface of the internal frame 106.

The internal frame 106 can be screw-coupled to the rear surface of the external frame 104 by using coupling brackets (not shown), or the rear surface of the internal frame 106 can be screw-coupled directly to the both side ends of the external frame 104. Parts of the external frame 104 and the internal frame 106 are formed to have step differences not to be more protruded than the installation surface when the screws are fastened.

A sealing member S is installed on the circumference of the internal frame 106 so that the outdoor unit can be closely installed on the rear surface of the internal frame 106. The sealing member S is composed of an elastic material such as a spongy, and fixedly installed on the rear surface of the internal frame 106 with a double-sided adhesive tape (not shown) on its front surface.

A plurality of installation guide ribs 106c on which the sealing member S is stably positioned are incorporated with the rear surface of the internal frame 106, for precisely disposing the sealing member S on the rear surface of the internal frame 106.

A median separator 110 is installed to cross the center of the internal frame 106, for s eparating the suction area 107a from the discharge area 107b i n the up/down direction. The front surface of the median separator 110 is vertical, the lower end 110a of the median separator 110 is upwardly sloped from the front to rear surface to guide a flow of air sucked to the suction area 107a, and the upper end 110b of the median separator 110 is horizontal to prevent a flow of air discharged from the discharge area 107b from being re-sucked to the suction area 107a. A suction area is widened toward the U-shaped heat exchanger installed in the outdoor unit, namely the condenser 30, by guiding the suction flow through the lower end 110a of the median separator 110, which results in high heat exchange efficiency of the condenser 30.

Preferably, the median separator 110 is formed in a hollow shape to cut down expenses, and various intensity reinforcing ribs (not shown) are formed therein. Preferably, a pair of installation guide ribs (not shown) are formed to cross the center of the rear surface of the median separator 110, so that the sealing member S for separating sucked air from discharged air in the outdoor unit can be adhered to the median separator 110.

Referring to Fig. 11 , each of the louver blades 108 includes a hollow blade shape louver main body 108A formed long in the longitudinal direction to cross the inside surface of the internal frame 106, and at least one reinforcing rib 108B formed i nside the l ouver main body 108A, for reinforcing i ntensity of the l ouver main body 108A. In the case that the louver blades 108 close the suction area 107a and the discharge area 107b of the internal frame 106, upper ends 108a are upwardly sloped to front surfaces 108f and lower ends 108b are downwardly sloped to rear surfaces 108r.

Preferably, the louver main bodies 108A are installed on the internal frame 106 so that the front surfaces 108f can be vertical, the rear surfaces 108r can be outwardly protruded toward the centers, and the front surfaces 108f can be externally shown for better appearance.

The assembly grooves 108h are formed at both ends of the louver main bodies 108A, so that the louver main bodies 108A can be coupled to the rotary links 112 and rotatably i nstalled on t he i nternal frame 106. H ere, the assembly grooves 108h are formed in a polygonal shape and surrounded by the louver main bodies 108A and the pair of reinforcing ribs 108B formed long inside the louver main bodies 108A in the longitudinal direction. On the other hand, when the louver blades 108 are closed on the internal frame 106, the upward sloping angle of the upper ends 108a of the louver blades 108 to the front surfaces 108f is preferably identical to the downward sloping angle of the lower ends 108b of the louver blades 108 to the rear surfaces 108r, so that the upper and lower ends 108a and 108b of the adjacent louver blades 108 can form the uniform thickness of upwardly-sloped gaps.

Accordingly, when the louver blades 108 are closed on the internal frame 106, even if alien substances such as raindrops or dusts contact the front surfaces 108f of the louver blades 108, they run down the front surfaces 108f of the louver blades 108. Because the gaps between the louver blades 108 are upwardly sloped, the alien substances do not pass through the gaps.

Preferably, when the louver blades 108 open the suction area 107a and the discharge area 107b, the louver blades 108 are rotated at a predetermined angle with their upper ends 108a facing their rear surfaces 108r, and when the louver blades 108 close the suction area 107a and the discharge area 107b, the louver blades 108 are rotated with their upper ends 108a facing their front surfaces 108f.

The assembly means includes caps 112 having assembly protrusions 112b on their one-side surfaces to be inserted into the assembly grooves 108h of each louver blade 108, and having fixing protrusions 112c on their rear surfaces, and plates 114 having assembly holes 114h at their centers so that the fixing protrusions 112c of the caps 112 can be inserted into the assembly holes 114h, and having their both ends inserted between the guide rails 106a and 106b. Accordingly, the louver blade assembly bodies 100 including the louver blades 108, the caps 112 and the plates 114 are rotatably coupled to the rotary links 124 through the holes 106h of the internal frame 106.

Here, the assembly protrusions 112b inserted into the assembly grooves 108h of the louver blades 108 are formed on one-side surfaces of the caps 112, and the fixing protrusions 112c screw-fastened B to the rotary links 124 are formed on the rear surfaces of the caps 112. Vertical cap surfaces 112a are formed to pass between the assembly protrusions 112b and the fixing protrusions 112c, and assembly guides 112d protruded in the assembly protrusions 112b direction are formed on the circumferences of the cap surfaces 112a.

When the assembly protrusions 112b of the caps 112 are inserted into the assembly grooves 108h of the louver blades 108, the assembly guides 112d of the caps 112 surround the ends of the louver blades 108, so that the louver blades 108 and the caps 112 can be rotated together.

Moreover, the assembly holes 114h are formed at the centers of the plates 114 so that the assembly protrusions 112b of the caps 112 can be inserted into the assembly holes 114h, and the plates 114 have step differences so that both ends of the plates 114 can be inserted between the guide rails 106a and 106b of the internal frame 106.

The caps 112, the plates 114 and the louver blades 108 are assembled to compose the louver blade assembly bodies 100. Here, the plates 114 are stacked between the guide rails 106a and 106b, and thus the fixing protrusions 112c of the caps 112 are positioned inside the holes 106h of the internal frame 106. Fixing grooves 124a are formed at the centers of one-side surfaces of the rotary links 124, so that the fixing protrusions 112c of the caps 112 can be inserted into the fixing grooves 124a, and screw grooves 124b are caved in the centers of the rear surfaces of the rotary links 124, so that the fixing protrusions 112c of the caps 112 can be screw-coupled B to the screw grooves 124b. The fixing grooves 124a and the screw grooves 124b are linked to each other with step differences.

In a state where the louver blade assembly bodies 100 are installed inside the internal frame 106, the rotary links 124 are installed from the outside of the internal frame 106. The fixing grooves 124a of the rotary links 124 and the fixing protrusions 112c of the caps 112 are assembled inside the holes 106h of the internal frame 106. Here, one of the rotary links 124 is selectively screw-fastened B to the connector 118. A pair of fastening bosses 124c and 124d are formed on the rotary links 124 toward the rear surfaces of the cap surfaces 112a, to implement usage of only a kind of the rotary links 124.

In addition, calking holes 1 24h a re formed outside the fastening bosses 124c and 124d of the rotary links 124 to be calk-coupled to the pair of lifting/lowering levers 122 and 123.

Although the fixing protrusions 112c of the caps 112 and the fixing grooves 124a of the rotary links 124 are assembled so that the caps 112 and the rotary links 124 can be easily screw-coupled B to each other, they are not rotated together. For this, at least one rotation preventing straight line unit 142 is formed on part of the fixing protrusions 112c of the caps 112, and at least one rotation preventing straight line unit 144 is formed on part of the fixing grooves 124a of the rotary links 124.

In order to prevent the caps 112 and the rotary links 124 from being rotated together in assembling, the fixing protrusions 112c of the caps 112 and the fixing grooves 124a of the rotary links 124 can be formed in a polygonal shape.

A plurality of calking holes 122h and 123h are formed on the pair of lifting/lowering l evers 122 and 123 i n the up/down direction at a predetermined interval to be calk-coupled to both ends of the rotary links 124. Therefore, calking members 121 are inserted into the calking holes 122h and 123h of the lifting/lowering levers 122 and 123 and the calking holes 124h of the rotary links 124 with their one-side ends hooked and their other-side ends fixedly compressed.

The connector 126 is screw-coupled B to one of the rotary links 124, and the driving motor 128 is coupled to rotate the connector in one or opposite direction.

Preferably, two connectors 126 and two driving motors 128 are installed to automatically open/close the louver blades 108 in the suction area 107a and the discharge area 107b, respectively. The driving motor 128 enables the louver blades 108 to open/close the suction area 107a and the discharge area 107b, by changing the rotation direction.

The louver blades 108 are electronically controlled to be rotated within a preset angle range during the rotation of the driving motor 128. For this, a pair of limit switches (not shown) are installed on the internal frame 106 to be adjacent to the upper and lower ends of one of the pair of lifting/lowering levers 122 and 123. When the louver blades 108 are completely closed, the pair of limit switches contact the lower end of one of the lifting/lowering levers 122 and 123, and when the louver blades 108 are opened at the preset angle, the pair of limit switches contact the upper end of one of the lifting/lowering levers 122 and 123.

Accordingly, when the driving motor 128 is operated, one of the rotary links 124 is rotated through the connector 126, and the rotary links 124 coupled through the pair of lifting/lowering levers 122 and 123 are all rotated. At the same time, the louver blades 108 open/close the suction area 107a and the discharge area 107b. Here, when the pair of limit switches contact one of the lifting/lowering levers 122 and 123, power supplied to the driving motor 128 is intercepted. As a result, the louver blades 108 are controlled to be opened/closed within the preset angle range. Even if the electronic components such as the limit switches are o ut of order, the louver blades 108 are mechanically controlled to be rotated within the preset angle range due to the rotation of the driving motor 128. For this, excessive rotation preventing means are formed in adjacent parts between the caps 112 and the plates 114, for preventing the louver blades 108 from being rotated over the preset angle.

As illustrated in Fig. 12, each of the excessive rotation preventing means include a rotation preventing rib 132 protruded from the center of the plate 114 in the longitudinal direction, an excessive closing preventing rib 134 formed long in the longitudinal direction at the upper side of the fixing protrusion 112c on the rear surface of the cap surface 112a, the rib 134 being engaged with the upper side of the rotation preventing rib 132 of the plate 114 for preventing rotation of the louver blade 108 when the louver blades 108 completely close the suction area 107a and the discharge area 107b, and an excessive opening preventing rib 136 formed in an arc shape on the circumference of the fixing protrusion 112c on the rear surface of the cap surface 1 12a, the rib 1 36 eing s upported by the lower side of the rotation preventing rib 134 of the plate 114 for preventing rotation of the louver blade 108 when the louver blades 108 open the suction area 107a and the discharge area 107b at the preset angle. Here, coupling ribs 135 are formed between the excessive closing preventing ribs 134 and the excessive opening preventing ribs 136, for reinforcing intensity of the excessive closing preventing ribs 134 and the excessive opening preventing ribs 136.

Figs. 13a to 13d are perspective views illustrating the louver blades assembling for the outdoor unit of the air conditioner in accordance with the present invention. The louver blades assembling for the outdoor unit of the air conditioner in accordance with the present invention will now be described. Referring to Fig. 13a, the caps 112 are coupled to both ends of the louver blade 108. Here, the assembly protrusions 112b of the caps 112 are inserted into the assembly grooves 108h of the louver blade 108, and the assembly guides 112d of the caps 112 surround the ends of the louver blade 108.

As illustrated in Fig. 13b, the plates 114 are coupled to the outside of the louver blade 108 and the caps 112. Here, the fixing protrusions 112c of the caps

112 pass through the assembly holes 114h of the plates 114, to form the louver blade assembly body 100 comprised of the louver blade 100, the caps 112 and the plates 114.

As shown in Fig. 13c, the plurality of louver blade assembly bodies 100 are stacked on the i nternal frame 1 06 from the upper side. H ere, both ends of the plates 114 are inserted between the guide rails 106a and 106b of the internal frame 106, and the fixing protrusions 112c of the caps 112 are positioned inside the holes

106h of the internal frame 106.

At this time, the plurality of louver blade assembly bodies 100 are stacked in the suction area 107a of the internal frame 106, the median separator 110 is installed, and the plurality of louver blade assembly bodies 100 are stacked in the discharge area 107b of the internal frame 106.

As depicted in Fig. 13d, the rotary links 124 are coupled to the louver blade assembly bodies 100 from the outside of the internal frame 106. Here, the fixing grooves 124a of the rotary links 124 and the fixing protrusions 112c of the caps 112 are assembled through the holes 106h of the internal frame 106, and the screws B and the screw grooves 124b of the rotary links 124 are assembled to fasten the rotary links 124 to the caps 112. The fixing protrusions 112c of the caps 112 and the fixing grooves 124a of the rotary links 124 are provided with the rotation preventing straight line units 142 and 144. Although the fixing protrusions 112c of the caps 112 and the fixing grooves 124a of the rotary links 124 are assembled, they are not rotated together. Accordingly, the caps 112 and the rotary links 124 can be stably screw-fastened B to each other.

The pair of lifting/lowering levers 122 and 123 are also coupled to the rotary links 124. In a state where the calking holes 122h and 123h of the lifting/lowering levers 122 and 123 overlap with the calking holes 124h of the rotary links 124, the calking members 121 are inserted into the calking holes 122h and 123h of the lifting/lowering levers 122 and 123 and the calking holes 124h of the rotary links

124 with their one-side ends hooked and their other-side ends fixedly compressed.

One of the rotary links 124 is coupled to the connector 126 and the driving motor 128. The connector 126 is screw-fastened B to the pair of fastening bosses 124c and 124d formed on one rotary link 124.

As described above, the louver blade assembly bodies 100 including the louver blades 108, the caps 112 and the plates 114 are stacked on the internal frame 106, and the rotary links 124, the pair of lifting/lowering levers 122 and 123, the connector 126 and the driving motor 128 are coupled from the outside of the internal frame 106, to complete a system louver.

Fig. 14 is a plane-sectional view illustrating a louver frame assembling for the outdoor unit of the air conditioner in accordance with the present invention.

The process for installing the system louver in the opened space on the outer wall 102 of the building will now be explained. As shown in Fig. 14, the both sides and the upper and lower ends of the external frame 104 are fixed on the inner wall of the opened space on the outer wall 102 of the building by using the anchor bolts A/B, and the system louver is mounted from the inside of the external frame 104, namely the rear surface. In a state where the internal frame 104 is adhered to the external frame 104, the system louver is screw-fastened thereto.

The sealing member S is precisely positioned between the pair of installation guide ribs 106L incorporated with the rear surface of the internal frame 106 or the median separator 110. The front surface of the sealing member S is adhered between the installation guide ribs 106L by using a double-sided tape.

In order to prevent air from being leaked between the internal frame 106 or the median separator 110 and the outdoor unit casing 10, the front surface of the outdoor unit casing 10 is adhered to the rear surface of the sealing member S.

Figs. 15a, 15b, 16a and 16b are operation state views illustrating a state where the louver blades for the outdoor unit of the air conditioner and the caps coupled to the louver blades are rotated within the preset angle range in accordance with the present invention. When the driving motor 128 rotates the connector 126 in one direction, the driving force of the driving motor 128 is transmitted to the louver blades 108 through the connector 126 and the rotary links 124, and the louver blades 108 are rotated with their upper ends 108a facing their rear surfaces 108r and operated from Fig. 15a to 15b, thereby opening the suction area 107a and the discharge area 107b.

Although the driving motor 128 is not stopped, the driving motor 128 is driven in one direction. As shown in Fig. 16a, the excessive opening preventing ribs 136 of the caps 112 are supported inside the lower sides of the rotation preventing ribs 132 of the plates 114, load is applied to the driving motor 128, and thus power supplied to the driving motor 128 is intercepted. Accordingly, the louver blades 108 are opened within the preset angle range. Conversely, when the driving motor 128 rotates the connector 126 in the opposite direction, the driving force of the driving motor 128 is transmitted to the louver blades 108 through the connector 126 and the rotary links 124, and the louver blades 108 are rotated with their upper ends 108a facing their front surfaces 108f and operated from Fig. 15b to 15a, thereby closing the suction area 107a and the discharge area 107b.

In the case that the louver blades 108 close the suction area 107a and the discharge area 107b, upwardly-sloped gaps are formed between the upper and lower ends 108a and 108b of the adjacent louver blades 108. Therefore, raindrops or dusts contacting the front surfaces 108f of the louver blades 108 do not pass through the gaps.

Although the driving motor 128 is not stopped, the driving motor 128 is driven in the opposite direction. As depicted in Fig. 16b, the excessive closing preventing ribs 134 of the caps 112 contact the inside of the upper sides of the rotation preventing ribs 132 of the plates 114, load is applied to the driving motor 128, and thus power supplied to the driving motor 128 is intercepted.

As a result, the louver blades 108 are electronically controlled by the limit switches and mechanically controlled by various ribs to be operated within the preset angle range. Although the preferred embodiments of the present invention have been described, it is understood that the present invention should not be limited to these preferred embodiments but various changes and modifications can be made by one skilled in the art within the spirit and scope of the present invention as hereinafter claimed.

Claims

WHAT IS CLAIMED IS:

1. A louver blades assembling for an outdoor unit of an air conditioner, comprising: an internal frame installed on an inner wall of an opened space on an outer wall of a building; a plurality of louver blades rotatably installed on the inside surface of the internal frame, for opening/closing the opened space by rotation; rotary links screw-fastened to the centers of both ends of each louver blade; and a pair of lifting/lowering levers for interlocking the rotary links by coupling one-side ends and the other-side ends of each rotary link, respectively.

2. The louver blades assembling of claim 1 , further comprising a driving motor for rotatably driving a connector connected to one of the rotary links.

3. The louver blades assembling of claim 2 , wherein a pair of fastening bosses are formed on the rotary links so that the rotary links can be selectively screw-fastened to the connector.

4. The louver blades assembling of claim 1 , wherein both ends of the rotary links are calk-coupled to the pair of lifting/lowering levers.

5. The louver blades assembling of claim 1 , wherein caps are installed between the louver blades and the rotary links, assembly protrusions inserted into assembly g rooves formed at the centers of both e nds of the I ouver blades are formed on one-side surfaces of the caps, and fixing protrusions screw-fastened to the rotary links are formed on the rear surfaces of the caps.

6. The louver blades assembling of claim 5, wherein assembly guides protruded in the assembly protrusion direction are formed on the circumferences of vertical cap surfaces formed to pass between the assembly protrusions and the fixing protrusions, the assembly guides being installed to surround the ends of the louver blades when the caps and the louver blades are assembled.

7. The louver blades assembling of claim 5, wherein a pair of reinforcing ribs are installed long on the louver blades in the longitudinal direction vertically to the inside of hollow blade shape louver main bodies, and the assembly grooves of the louver blades are surrounded by the louver main bodies and the pair of reinforcing ribs.

8. The louver blades assembling of claim 5, wherein fixing grooves are formed at the centers of one-side surfaces of the rotary links, so that the fixing protrusions of the caps can be inserted into the fixing grooves, and screw grooves are formed at the centers of the rear surfaces of the rotary links, so that the fixing protrusions of the caps can be screw-coupled to the screw grooves.

9. The louver blades assembling of claim 8, wherein rotation preventing straight line u nits a re formed o n part of the fixing p rotrusions of the caps, and rotation preventing straight line units are formed on part of the fixing grooves of the rotary links, for preventing the fixing protrusions of the caps and the fixing grooves of the rotary links from being rotated together, when they are assembled.

10. The louver blades assembling of any one of claims 5 to 9, wherein a pair of guide rails are formed long on the inside surface of the internal frame in the longitudinal direction, and a plurality of holes are formed between the guide rails in the longitudinal direction at a predetermined interval; in the louver blade assembly bodies including the louver blades, the caps having their assembly protrusions inserted into the assembly grooves of the louver blades, and plates having assembly holes which the fixing protrusions of the caps are inserted into, the plates are stacked between the guide rails, so that the fixing protrusions can be positioned inside the holes of the internal frame; and the rotary links are screw-fastened to the fixing protrusions of the caps from the outside of the internal frame.

11. The louver blades assembling of claim 10, wherein excessive rotation preventing means are formed in adjacent parts between the caps and the plates, for preventing the louver blades from being rotated over the preset angle.

12. The louver blades assembling of claim 11 , wherein the excessive rotation preventing means comprise rotation preventing ribs protruded from the centers of the plates in the longitudinal direction, excessive closing preventing ribs formed long in the longitudinal direction at the upper sides of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being engaged with the upper sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades completely close the opened s pace, and excessive opening preventing ribs formed on the circumferences of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being supported by the lower sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades open the opened space at the preset angle.

13. The louver blades assembling of any one of claims 1 to 9, wherein an external frame is fixedly installed to contact the inner wall of the opened space on the outer wall of the building, and a system louver in which the louver blades are mounted on the internal frame is fixedly installed on the external frame.

14. A louver blades assembling for an outdoor unit of an air conditioner, comprising: an internal frame installed on an inner wall of an opened space on an outer wall of a building, a pair of guide rails being formed long on the inside surface of the internal frame in the longitudinal direction; a plurality of louver blades rotatably installed on the inside surface of the internal frame, for opening/closing the opened space by rotation; assembly means inserted into assembly grooves formed at the centers of both ends of each louver blade, for stacking the louver blades between the guide rails; and a driving means installed outside the internal frame to be coupled to the assembly means, for rotatably driving the louver blades.

15. The louver blades assembling of claim 14, wherein a pair of reinforcing ribs are installed long on the louver blades in the longitudinal direction vertically to the inside of hollow blade shape louver main bodies, and the assembly grooves of the louver blades are surrounded by the louver main bodies and the pair of reinforcing ribs.

16. The louver blades assembling of claim 14, wherein the assembly means comprises caps having assembly protrusions on their one-side surfaces to be inserted into the assembly grooves of each louver blade, and having fixing protrusions on their rear surfaces, plates having assembly holes at their centers so that the fixing protrusions of the caps can be inserted into the assembly holes, and having their both ends inserted between the guide rails, and a plurality of holes formed on the internal frame in the longitudinal direction at a predetermined interval, so that the louver blade assembly bodies including the louver blades, the caps and the plates can be rotatably coupled to the driving means on the internal frame.

17. The louver blades assembling of claim 16, wherein assembly guides protruded in the assembly protrusion direction are formed on the circumferences of vertical cap surfaces formed to pass between the assembly protrusions and the fixing protrusions, the assembly guides being installed to surround the ends of the louver blades when the caps and the louver blades are assembled.

18. The louver blades assembling of claim 16, wherein the driving means comprises a plurality of rotary links screw-fastened to the fixing protrusions of the caps from the outside of the internal frame, a pair of lifting/lowering levers for interlocking the rotary links by coupling one-side ends and the other-side ends of each rotary link, respectively, and a driving motor for rotatably driving a connector connected to one of the rotary links.

19. The louver blades assembling of claim 18, wherein a pair of fastening bosses are formed on the rotary links so that the rotary links can be selectively screw-fastened to the connector.

20. The louver blades assembling of claim 18, wherein both ends of the rotary links are calk-coupled to the pair of lifting/lowering levers.

21. The louver blades assembling of claim 18, wherein fixing grooves are formed at the centers of one-side surfaces of the rotary links, so that the fixing protrusions of the caps can be inserted into the fixing grooves, and screw grooves are formed at the centers of the rear surfaces of the rotary links, so that the fixing protrusions of the caps can be screw-coupled to the screw grooves.

22. The louver blades assembling of claim 21 , wherein rotation preventing straight line u nits a re formed o n part of the fixing p rotrusions of the caps, and rotation preventing straight line units are formed on part of the fixing grooves of the rotary links, for preventing the fixing protrusions of the caps and the fixing grooves of the rotary links from being rotated together, when they are assembled.

23. The louver blades assembling of any one of claims 16 to 22, wherein excessive rotation p reventing m eans a re formed in adjacent p arts between the caps and the plates, for preventing the louver blades from being rotated over a preset angle.

24. The louver blades assembling of claim 23, wherein the excessive rotation preventing means comprise rotation preventing ribs protruded from the centers of the plates in the longitudinal direction, excessive closing preventing ribs formed long in the longitudinal direction at the upper sides of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being engaged with the upper sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades completely close the opened s pace, and excessive opening preventing ribs formed on the circumferences of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being supported by the lower sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades open the opened space at the preset angle.

25. The louver blades assembling of any one of claims 14 to 22, wherein an external frame is fixedly installed to contact the inner wall of the opened space on the outer wall of the building, and a system louver in which the louver blades are mounted on the internal frame is fixedly installed on the external frame.

26. A louver blades assembling for an outdoor unit of an air conditioner, comprising: an internal frame installed on an inner wall of an opened space on an outer wall of a building, a pair of guide rails being formed long on the inside surface of the internal frame in the longitudinal direction; a plurality of louver blades rotatably installed on the inside surface of the internal frame, for opening/closing the opened space by rotation; caps having assembly protrusions at the centers of their one-side surfaces to be inserted into the assembly grooves formed at the centers of both ends of each louver blade, and having fixing protrusions at the centers of their rear surfaces; plates having assembly holes at their centers so that the fixing protrusions of the caps can be inserted into the assembly holes, and having their both ends inserted between the guide rails; a driving means installed outside the internal frame to be coupled to the fixing protrusions of the caps, for rotatably driving the louver blades; and excessive rotation preventing means formed in adjacent parts between the caps and the plates, for preventing the louver blades from being rotated over a preset angle.

27. The louver blades assembling of claim 26, wherein assembly guides protruded in the assembly protrusion direction are formed on the circumferences of vertical cap surfaces formed to pass between the assembly protrusions and the fixing protrusions, the assembly guides being installed to surround the ends of the louver blades when the caps and the assembly guides are assembled.

28. The louver blades assembling of claim 27, wherein the excessive rotation preventing means comprise rotation preventing ribs protruded from the centers of the plates in the longitudinal direction, excessive closing preventing ribs formed long in the longitudinal direction at the upper sides of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being engaged with the upper sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades completely close the opened s pace, and excessive opening preventing ribs formed on the circumferences of the fixing protrusions on the rear surfaces of the cap surfaces, the ribs being supported by the lower sides of the rotation preventing ribs of the plates for preventing rotation of the louver blades when the louver blades open the opened space at the preset angle.

29. The louver blades assembling of claim 26, wherein the driving means comprises a plurality of rotary links screw-fastened to the fixing protrusions of the caps from the outside of the internal frame, a pair of lifting/lowering levers for interlocking the rotary links by coupling one-side ends and the other-side ends of each rotary link, respectively, and a driving motor for rotatably driving a connector connected to one of the rotary links.

30. The louver blades assembling of claim 29, wherein a pair of fastening bosses are formed on the rotary links so that the rotary links can be selectively screw-fastened to the connector.

31. The louver blades assembling of claim 29, wherein both ends of the rotary links are calk-coupled to the pair of lifting/lowering levers.

32. The louver blades assembling of claim 29, wherein fixing grooves are formed at the centers of one-side surfaces of the rotary links, so that the fixing protrusions of the caps can be inserted into the fixing grooves, and screw grooves are formed at the centers of the rear surfaces of the rotary links, so that the fixing protrusions of the caps can be screw-coupled to the screw grooves.

33. The louver blades assembling of claim 32, wherein rotation preventing straight line u nits a re formed on part of the fixing p rotrusions of the caps, and rotation preventing straight line units are formed on part of the fixing grooves of the rotary links, for preventing the fixing protrusions of the caps and the fixing grooves of the rotary links from being rotated together, when they are assembled.

34. The louver blades assembling of any one of claims 26 to 33, wherein an external frame is fixedly installed to contact the inner wall of the opened space on the outer wall of the building, and a system louver in which the louver blades are mounted on the internal frame is fixedly installed on the external frame.

35. A louver blades assembling for an outdoor unit of an air conditioner including a plurality of louver blades stacked and rotatably installed on an internal frame o n a n i nner wall of a n o pened s pace o n a n o uter wall of a b uilding, for opening/closing the opened space and guiding an air flow, wherein each of the louver blades comprises a hollow blade shape louver main body having its upper end upwardly sloped to its front surface and its lower end downwardly sloped to its rear surface, and at least one reinforcing rib formed inside the louver main body, for reinforcing intensity of the louver main body.

36. The louver blades assembling of claim 35, wherein assembly grooves are formed at both ends of the louver main bodies, so that the louver main bodies can be rotatably coupled to the internal frame.

37. The louver blades assembling of claim 36, wherein the assembly grooves are surrounded by the louver main bodies and the pair of reinforcing ribs formed long inside the louver main bodies in the longitudinal direction.

38. The louver blades assembling of claim 35, wherein the front surfaces of the louver blades are vertical, and the rear surfaces of the louver blades are outwardly protruded toward the centers.

39. The louver blades assembling of claim 38, wherein the upper ends of the louver blades are positioned to have upwardly-sloped gaps from the lower ends of the louver blades disposed in the upper sides, and the lower ends of the louver blades are positioned to have upwardly-sloped gaps from the upper ends of the louver blades disposed in the lower sides.

40. The louver blades assembling of any one of claims 35 to 38, wherein the louver blades are rotated at a preset angle with their upper ends facing their rear surfaces when opening the opened space, and rotated with their upper ends facing their front surfaces when closing the opened space.

41. A louver frame for an outdoor unit of an air conditioner, comprising: an external frame fixed in an opened space on an outer wall of a building by using a fastening means; and an internal frame being fixedly coupled to the external frame on the rear surface of the external frame, separating a suction area from a discharge area, and having a plurality of louver blades in each area.

42. The louver frame of claim 41 , further comprising a median separator coupled to cross the internal frame, for separating the suction area from the discharge area in the lower and upper sides.

43. The louver frame of claim 41 , wherein the external frame is formed in a rectangular frame shape, and has its upper, lower and both side ends fixed in the opened space on the outer wall of the building by using anchor bolts.

44. The louver frame of claim 43, wherein the external frame has a section of ' H ', and a plurality of intensity reinforcing ribs are formed inside the external frame, for reinforcing intensity.

45. The louver frame of claim 44, wherein the internal frame is screw-fastened and coupled to the external frame by using coupling brackets.

46. The louver frame of claim 45, wherein the internal frame has a section of 'τ-\ and a plurality of intensity reinforcing ribs are formed i nside the i nternal frame, for reinforcing intensity.

47. The louver frame of claim 42, wherein the front surface of the median separator is vertical, and the lower end of the median separator is upwardly sloped from the front to rear surface to guide a flow of air sucked to the suction area.

48. The louver frame of claim 47, wherein the upper end of the median separator is horizontal to prevent a flow of air discharged from the discharge area from being re-sucked to the suction area.

49. The louver frame of any one of claims 41 to 48, wherein a sealing member is adhered to the circumference of the rear surface of the internal frame, and the outdoor unit is closely installed from the rear surface of the internal frame to contact the sealing member.

50. The louver frame of claim 49, wherein a pair of installation guide ribs are formed on the circumference of the rear surface of the internal frame, so that the sealing member can be stably positioned thereon.