CN215982918U - Heat dissipation device and air conditioner - Google Patents
Heat dissipation device and air conditioner Download PDFInfo
- Publication number
- CN215982918U CN215982918U CN202122616069.5U CN202122616069U CN215982918U CN 215982918 U CN215982918 U CN 215982918U CN 202122616069 U CN202122616069 U CN 202122616069U CN 215982918 U CN215982918 U CN 215982918U
- Authority
- CN
- China
- Prior art keywords
- heat dissipation
- outlet
- air
- wire
- air inlet
- 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.)
- Active
Links
Images
Landscapes
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The utility model provides a heat dissipation device and an air conditioner. The heat dissipating device includes: the heat dissipation channel is provided with an air inlet and an air outlet; a heat radiation fan; and one side of the flow guide ring, which faces the heat radiation fan, is staggered with the air outlet. The utility model solves the problems of short circuit and controller burnout caused by rainwater splashed into the side of the electric control box through the heat dissipation holes of the partition plate along with the high-speed rotation of the fan in severe weather.
Description
Technical Field
The utility model relates to the technical field of air conditioners, in particular to a heat dissipation device and an air conditioner.
Background
The existing outdoor unit of air conditioner, especially the outdoor unit of central air conditioner, has large power of electronic devices and high heat productivity. The electronic control box is particularly critical to heat dissipation except that the surface of a driving module of an electronic device is attached by high-heat-conducting-performance materials such as cast aluminum and the like, and local heat dissipation is achieved by the scheme of air cooling or refrigerant cooling and the like.
For an air conditioner with a large heat productivity of a controller, in order to improve the heat dissipation effect of an electric control box, heat dissipation holes are generally formed in a partition plate connected with the electric control box. The negative pressure formed by rotation of the fan when the air conditioner operates is used for enabling the heat energy of the electric control box to flow to the fan side, so that hot air flowing is enhanced, the temperature of the electric control box is quickly reduced, and the reliability and the service life of electronic devices are guaranteed.
However, the outdoor unit of the air conditioner is provided with a plurality of drain holes on the chassis and an air outlet net cover. In bad weather, rainwater can enter the outdoor unit through the drain hole and/or the air outlet mesh enclosure along with the high-speed rotation of the fan, and then splash into the electric control box through the heat dissipation holes, so that the problems of short circuit, controller burnout and the like can be caused.
Therefore, the heat dissipation structure of the existing air conditioner has the problems that rainwater splashes into the side of the electric control box through the heat dissipation holes of the partition plates along with the high-speed rotation of the fan in severe weather, so that a circuit is short-circuited and the controller is burnt.
SUMMERY OF THE UTILITY MODEL
The utility model solves the problems of short circuit and controller burnout caused by rainwater splashed into the side of the electric control box through the heat dissipation holes of the partition plate along with the high-speed rotation of the fan in severe weather.
In order to solve the above problem, an embodiment of the present invention provides a heat dissipation apparatus, including: the heat dissipation channel is provided with an air inlet and an air outlet; a heat radiation fan; and one side of the flow guide ring, which faces the heat radiation fan, is staggered with the air outlet.
Compared with the prior art, the technical scheme has the following technical effects: because rainwater splashes into automatically controlled box side through baffle louvre along with the high-speed rotation of fan when current air conditioner's heat radiation structure exists bad weather, leads to the problem that circuit short circuit, controller burn out, and this application sets up to the dislocation through the one side with radiating channel's air outlet and water conservancy diversion circle towards radiator fan to avoid the water of water conservancy diversion circle department to splash into the air outlet, effectively solve the problem that radiating channel leaked
In one embodiment of the present invention, further comprising: the first blocking wall is arranged on one side opposite to the air outlet; the second blocking wall is arranged on one side opposite to the air inlet; the third retaining wall is connected with the bottom ends of the first retaining wall and the second retaining wall; the first blocking wall, the second blocking wall and the third blocking wall are matched to form the heat dissipation channel, and the air outlet and the air inlet are arranged in different directions.
The technical effect achieved by adopting the technical scheme is as follows: because the air inlet and the air outlet are in different directions, one of the blocking walls is necessarily opposite to the air inlet, and the other blocking wall is necessarily opposite to the air outlet; therefore, the plurality of baffle walls can seal the air inlet, the cavity and the air outlet to form a heat dissipation channel, so that water is prevented from entering the heat dissipation channel. Therefore, the heat dissipation device is used in the outdoor unit of the air conditioner, and water can be prevented from entering the electric control box.
In one embodiment of the present invention, a surrounding edge structure is disposed around the air inlet, and the surrounding edge structure connects the first blocking wall and the third blocking wall; the first blocking wall, the second blocking wall, the third blocking wall and the surrounding edge structure are integrally formed in an injection molding mode.
The technical effect achieved by adopting the technical scheme is as follows: through with surrounding edge structure and first fender wall and third fender wall and integrative injection moulding's structure, have simple structure, the part is few, advantage such as with low costs and production efficiency height.
In one embodiment of the present invention, the heat dissipating device further includes: the two limiting ribs are respectively positioned at two opposite sides of the air inlet; wherein, the filter screen card is established between two spacing ribs.
The technical effect achieved by adopting the technical scheme is as follows: the filter screen draw-in groove with two spacing ribs all can realize that the card establishes the clamp and presss from both sides tightly the filter screen is avoided the filter screen removes in order to expose the air intake.
In one embodiment of the present invention, further comprising: the wire passing groove structure is provided with a wire passing channel and is connected with the surrounding edge structure; the wire passing groove structure is provided with a wire outlet and a wire inlet, and the wire outlet and the wire inlet are communicated with the wire passing channel; the outlet and the inlet are arranged oppositely, and the outlet and the inlet are in the same direction.
The technical effect achieved by adopting the technical scheme is as follows: the wire passing groove structure can protect a connecting circuit arranged in the wire passing channel, effectively shield the wire outlet and prevent rainwater from entering from the wire inlet.
In one embodiment of the present invention, the wire duct structure includes: and the limiting buckle is arranged in the wire passing channel.
The technical effect achieved by adopting the technical scheme is as follows: spacing buckle can with connecting circuit stabilizes in crossing the line passageway, avoid connecting circuit scurries out.
In one embodiment of the present invention, the wire passing groove structure is further provided with a sealing clamping groove surrounding the outlet.
The technical effect achieved by adopting the technical scheme is as follows: the sealing clamping groove can be in sealing butt joint with the mounting position of the heat dissipation device to seal and protect the connecting circuit.
In one embodiment of the present invention, further comprising: the partition plate is provided with heat dissipation holes and is attached to the air outlet; the surrounding edge structure is further provided with a connecting structure, and the surrounding edge structure is connected with the partition plate through the connecting structure.
The technical effect achieved by adopting the technical scheme is as follows: the connecting structure is used for fixedly connecting the heat dissipation device to the corresponding mounting position.
In one embodiment of the present invention, further comprising: the filter screen covers the air inlet; the filter screen clamping groove is arranged at the air inlet; wherein, the filter screen can be inserted in the filter screen draw-in groove.
The technical effect achieved by adopting the technical scheme is as follows: the filter screen can avoid insects, mice and other organisms to pass through the heat dissipation channel.
In one embodiment of the present invention, further comprising: the two limiting ribs are respectively positioned at two opposite sides of the air inlet; wherein, the filter screen card is established between two spacing ribs.
In another aspect, an embodiment of the present invention further provides an air conditioner, including: the heat dissipating device according to any of the above embodiments.
In summary, the above embodiments of the present application may have one or more of the following advantages or benefits: i) the sealing structure has good sealing performance, solves the problems of water leakage and insects and rats, and is suitable for various severe environments; ii) simple structure, low cost and high production and assembly efficiency; iii) the connecting line has good sealing performance and can protect the reliability of the line connection.
Drawings
Fig. 1 is a schematic structural diagram of a heat dissipation device 100 according to a first embodiment of the present invention.
FIG. 2 is a schematic structural diagram of the heat dissipation channel 10, the surrounding structure 20 and the wire-passing groove structure 30 shown in FIG. 1
Fig. 3 is a structural schematic view of the heat dissipation channel 10, the surrounding edge structure 20, and the wire-passing trough structure 30 shown in fig. 1 from another perspective.
Fig. 4 is a vertical sectional view of the heat dissipation channel 10 shown in fig. 1.
Fig. 5 is a schematic structural view of the heat dissipation channel 10, the surrounding structure 20, the wire passing groove structure 30 and the filter screen 40 shown in fig. 1.
Fig. 6 is a transverse sectional view of the heat dissipation channel 10 shown in fig. 4.
Fig. 7 is a schematic structural view of the screen 40 in fig. 4.
Fig. 8 is another schematic structural diagram of the heat dissipation device 100 according to the first embodiment of the present invention.
Fig. 9 is a schematic view showing the connection of the heat insulating plate 60 and the heat dissipation channel 10 in fig. 8.
Fig. 10 is a transverse sectional view of the connection structure of the partition 60 and the heat dissipation channel 10 in fig. 9.
Description of the main element symbols:
100 is a heat sink; 10 is a heat dissipation channel; 11 is an air outlet; 12 is an air inlet; 13 is a cavity; 14 are limit ribs; 15 is a first blocking wall; 16 is a second retaining wall; 17 is a third retaining wall; 20 is a surrounding edge structure; 21 is a connecting structure; 30 is a wire passing groove structure; 31 is a wire passing channel; 32 is a limit buckle; 33 is an outlet; 34 is a sealing clamping groove; 40 is a filter screen; 41 is a hook; 50 is the hot air flow direction; 60 is a clapboard; 61 is a heat dissipation hole; 62 is a threading hole; 70 is a heat dissipation fan; 80 is a guide ring; and 90 is a circuit board.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
Fig. 1 is a schematic structural diagram of a heat dissipation device according to a first embodiment of the present invention. The heat sink 100 includes, for example: a heat dissipation channel 10, a heat dissipation fan 70 and a guide ring 80. The heat dissipating channel 10 is provided with an air inlet 12 and an air outlet 11, and one side of the deflector ring 80 facing the heat dissipating fan is staggered with the air outlet 11.
For example, when the heat dissipation structure of the existing air conditioner has severe weather, rainwater splashes into the side of the electric control box through the partition heat dissipation holes along with the high-speed rotation of the fan, which causes the problems of short circuit and burning of the controller, and the air outlet 11 of the heat dissipation channel 10 and one side of the diversion ring 80 facing the heat dissipation fan 70 are arranged to be staggered, so that the water at the diversion ring 80 is prevented from splashing into the air outlet, and the problem of water leakage of the heat dissipation channel 10 is effectively solved.
Preferably, the offset distance between the side of the deflector ring 80 facing the heat dissipation fan 70 and the air outlet 11 is L1, and the offset distance L1 is not less than 5 mm. Therefore, water at the position of the flow guide ring 80 can be effectively prevented from splashing into the air outlet 11.
Specifically, with reference to fig. 1 to 3, the heat dissipation apparatus 100 further includes: a first retaining wall 15, a second retaining wall 16 and a third retaining wall 17. Wherein, the first blocking wall 15 is arranged at one side opposite to the air outlet 11; the second blocking wall 16 is arranged at one side opposite to the air inlet 12; the third retaining wall 17 connects the bottom ends of the first retaining wall 15 and the second retaining wall 16; and the first blocking wall 15, the second blocking wall 16 and the third blocking wall 17 cooperate to form the heat dissipation channel 10.
Preferably, the air outlet 11 and the air inlet 12 are arranged in different directions. For example, the air inlet 12 and the air outlet 11 are oriented differently, so as to prevent water from entering the heat dissipation channel 10.
Furthermore, the first blocking wall 15, the second blocking wall 16 and the third blocking wall 17 may be enclosed to form a square structure, and the air outlet 11 and the air inlet 12 are respectively disposed on different sides. Wherein, the opening area of the air inlet 12 is larger than that of the air outlet 11.
Specifically, the heat dissipation device 100 further includes a surrounding edge structure 20, for example, the surrounding edge structure 20 is disposed on a side where the air inlet 12 is formed, and is used for enhancing the strength of the heat dissipation device 100.
The skirt structure 20 is disposed around the intake vent 12. For example, the surrounding edge structure 20 includes a plurality of surrounding edge plates, the air inlet 12 is a square opening, and the surrounding edge plates are respectively connected to four opening edges of the square opening and respectively extend toward the periphery of the air inlet 12.
The surrounding edge structure 20, the first blocking wall 15, the second blocking wall 16 and the third blocking wall 17 can be integrally formed by injection molding, so that the number of parts can be reduced, the production cost can be reduced, and the production and assembly efficiency can be improved.
With continued reference to fig. 1-4, the heat dissipation device 100 is further provided with, for example, a wire chase structure 30. The wire duct structure 30 is disposed on the top of the heat dissipating device 100, and can be connected to the top of the heat dissipating channel 10, and can also be connected to the surrounding edge structure 20, such as the surrounding edge plates of the surrounding edge structure 20 located on both sides of the air inlet 12.
Specifically, the wire-passing groove structure 30 has a wire-passing channel 31, and the wire-passing channel 31 is used for accommodating a connecting wire therein. For example, the top of the wire passage 31 is provided with an opening for loading the connection wire, and the connection wire is loaded into the wire passage 31 from the opening.
The wire passing groove structure 30 is further provided with a limiting buckle 32, for example, and the limiting buckle 32 is arranged in the wire passing channel 31 and is used for preventing the connecting wire from coming out from the opening. For example, a plurality of the limit buckles 32 are sequentially arranged along the length direction of the wire passage 31.
The wire-guiding groove structure 30 is further provided with an outlet 33 communicated with the wire-guiding channel 31, for example, and the outlet 33 is oriented in the same direction as the air inlet 12. The connection line can be fed via the line channel 31 to the intake opening 12 via the outlet 33. The wire-guiding groove structure 30 can prevent water from entering the wire-guiding channel 31, so as to prevent water from flowing into the side of the air inlet 12 from the outlet 33.
In one embodiment, the wire trough structure 30 is further provided with a sealing groove 34, for example, and the sealing groove 34 is disposed around the outlet 33. When the heat dissipation device 100 is installed at a target position, the outlet 33 needs to be in butt joint with a threading hole at the target position, and the sealing slot 34 can improve the sealing performance of the butt joint and prevent water from entering the air inlet 12 side from the outlet 33.
Referring to fig. 5, the heat sink 100 further includes, for example, a screen 40. The filter screen 40 covers the intake vent 12. The filter screen 40 can prevent insects, mice and the like from entering the air inlet 12 side through the air outlet 11 and the cavity 13.
In one embodiment, the heat sink 100 has a screen slot for installing the screen 40 at one side of the air inlet 12. The filter screen clamping groove is provided with an insertion opening at the top, and the filter screen 40 can be inserted into the filter screen clamping groove from the insertion opening so as to be fixed at the air inlet 12.
For example, referring to fig. 6, the heat dissipating device 100 includes two limiting ribs 14 disposed opposite to each other, the two limiting ribs 14 are disposed on opposite sides of the air inlet 12, and the filter screen 40 is clamped between the two limiting ribs 14. Of course, the two retaining ribs 14 can also be considered to form the screen slot.
For example, a retaining rib 14 is connected to the second retaining wall 16; the other retaining rib 14 is connected to the surrounding edge structure 20. Of course, the two limiting ribs 14 may also be connected to the edge plates disposed on two opposite sides of the air outlet 11, which is not described herein again. The insertion holes are formed in the top of the two limiting ribs 14 connected with the wire passing groove structure 30.
The hot air flowing direction 50 indicates that the hot air at one side of the air inlet 12 flows to one side of the air outlet 11 through the cavity 13 and the air outlet 11, so as to realize heat dissipation at one side of the air outlet 11. The filter screen 40 can perform filtering and protecting functions, so as to prevent impurities or insects and mice from passing through the heat dissipation channel and flowing between the air inlet 12 side and the air outlet 11 side.
In particular, referring to fig. 7, the strainer 40 is further provided with a hook 41, and the hook 41 is used for fixing the position of the strainer 40. The hook 41 firmly fixes the filter screen 40 in the filter screen slot, and of course, the hook 41 may also be hung at a target position for installing the heat sink 100. For example, the hook 41 may be a folded structure disposed on the top side of the filter screen 40, and the folded structure may further facilitate taking out the filter screen 40 from the filter screen clamping groove, so that the filter screen 40 may be taken out for cleaning during after-sale maintenance, thereby reducing wind resistance and ensuring heat dissipation effect.
Specifically, referring to fig. 8 to 10, the heat dissipation device 100 further includes: a partition 60. Wherein, be equipped with louvre 61 on the baffle 60, and one side laminating of air intake 12 to baffle 60, simultaneously, air intake 12 just faces louvre 61, and air intake 12 can cover louvre 61 completely.
In a particular embodiment, the skirt structure 20 may also be provided with a connecting structure 21. The attachment structure 21 is used to attach the baffle 60 to the curb structure 20. For example, the connecting structure 21 may be a plurality of threaded holes disposed around the air inlet 12, and a plurality of fasteners are engaged with the threaded holes to connect the partition 60 and the surrounding edge structure 20, which will not be described herein.
In one embodiment, the heat dissipation device 100 is fixedly connected to the partition 60 by the connection structure 21 provided on the surrounding edge structure 20. Heat sink 100 may be secured to partition 60, for example, by a plurality of fasteners; of course, the connecting structure 21 may also be a connecting member such as a snap-fit member, which is not described herein again.
Preferably, the partition 60 is further provided with a threading hole 62, for example. The threading hole 62 faces the outlet 33, and the sealing slot 34 is sealed and clamped in the threading hole 62.
[ second embodiment ]
A second embodiment of the present invention provides an air conditioner. The air conditioner includes, for example, the heat dissipating device 100 as described in the first embodiment.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. A heat dissipating device, comprising:
the heat dissipation channel (10), the heat dissipation channel (10) is provided with an air inlet (12) and an air outlet (11);
a heat radiation fan (70);
the air guide ring (80) faces one side of the heat radiation fan (70) and is staggered with the air outlet (11).
2. The heat dissipating device of claim 1, further comprising:
the first blocking wall (15) is arranged on one side opposite to the air outlet (11);
the second blocking wall (16) is arranged on one side opposite to the air inlet (12);
a third retaining wall (17) connecting the bottom ends of the first retaining wall (15) and the second retaining wall (16);
the first blocking wall (15), the second blocking wall (16) and the third blocking wall (17) are matched to form the heat dissipation channel (10), and the arrangement directions of the air outlet (11) and the air inlet (12) are different.
3. The heat dissipating device of claim 2, further comprising:
the surrounding edge structure (20) is arranged around the air inlet (12), and the surrounding edge structure (20) is connected with the first retaining wall and the third retaining wall;
the first retaining wall (15), the second retaining wall (16), the third retaining wall (17) and the surrounding edge structure (20) are integrally formed in an injection molding mode.
4. The heat dissipating device of claim 3, further comprising:
the wire passing groove structure (30) is provided with a wire passing channel (31) and is connected with the surrounding edge structure (20);
an outlet (33) and a wire inlet (35) are arranged on the wire passing groove structure (30), and the outlet (33) and the wire inlet (35) are communicated with the wire passing channel (31);
the outlet (33) and the inlet (35) are arranged oppositely, and the outlet (33) and the inlet (12) are in the same direction.
5. The heat dissipating device of claim 4, wherein the wire-trough structure (30) comprises:
and the limiting buckle (32) is arranged in the wire passing channel (31).
6. The heat sink as recited in claim 4, wherein the wire trough structure (30) is further provided with a sealing groove (34) surrounding the outlet (33).
7. The heat dissipating device of claim 3, further comprising:
the partition plate (60) is provided with heat dissipation holes (61), and the partition plate (60) is attached to the air outlet (11);
the surrounding edge structure (20) is further provided with a connecting structure (21), and the surrounding edge structure (20) is connected with the partition plate (60) through the connecting structure (21).
8. The heat dissipating device of claim 1, further comprising:
the filter screen (40) covers the air inlet (12);
the filter screen clamping groove is formed in the air inlet (12);
wherein, the filter screen (40) can be inserted into the filter screen clamping groove.
9. The heat dissipating device of claim 8, further comprising:
the two limiting ribs (14) are respectively positioned at two opposite sides of the air inlet (12);
wherein, the filter screen (40) is clamped between the two limiting ribs (14).
10. An air conditioner, comprising:
the heat sink (100) according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616069.5U CN215982918U (en) | 2021-10-28 | 2021-10-28 | Heat dissipation device and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616069.5U CN215982918U (en) | 2021-10-28 | 2021-10-28 | Heat dissipation device and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215982918U true CN215982918U (en) | 2022-03-08 |
Family
ID=80511331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122616069.5U Active CN215982918U (en) | 2021-10-28 | 2021-10-28 | Heat dissipation device and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215982918U (en) |
-
2021
- 2021-10-28 CN CN202122616069.5U patent/CN215982918U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR0184698B1 (en) | Outdoor device of airconditioner | |
| CN215982918U (en) | Heat dissipation device and air conditioner | |
| CN210832440U (en) | Air conditioner and electric control box thereof | |
| CN219164432U (en) | Air-cooled frequency converter in integrated frequency converter | |
| CN209763320U (en) | Air conditioner | |
| CN209929779U (en) | Block terminal convenient to heat dissipation and ventilation | |
| CN210399241U (en) | Water accumulation prevention electric control box and air conditioning system | |
| CN210951590U (en) | Air conditioner | |
| CN213841427U (en) | Electrical apparatus box and heat pump set that heat dissipation is good | |
| CN216844927U (en) | Automatically controlled box, control assembly and air condensing units | |
| CN210641167U (en) | Automatically controlled box subassembly and air condensing units | |
| CN210490623U (en) | Synchronous motor cover plate with heat dissipation function | |
| CN210397218U (en) | Frequency converter cooling fan waterproof device and frequency converter | |
| CN212179049U (en) | Integral air conditioner | |
| CN216287880U (en) | Reactor subassembly and air conditioner | |
| CN106051954B (en) | Air conditioner outdoor unit and air conditioner | |
| CN220669614U (en) | Electrical box and air conditioner outdoor unit | |
| CN112797504A (en) | Automatically controlled box and air conditioner | |
| CN107426947B (en) | Fill heat radiation structure of electric pile | |
| CN217508575U (en) | Frequency converter with waterproof function | |
| CN210638188U (en) | Air conditioner outdoor unit and electric control box for same | |
| CN218102251U (en) | Electric energy supply box | |
| CN220013107U (en) | Electric control box and washing machine | |
| CN217283822U (en) | Heat dissipation waterproof device and electronic equipment | |
| CN215062481U (en) | Electrical apparatus box and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221026 Address after: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee after: NINGBO AUX ELECTRIC Co.,Ltd. Patentee after: AUX AIR CONDITIONING LIMITED BY SHARE Ltd. Address before: 315100 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee before: NINGBO AUX ELECTRIC Co.,Ltd. Patentee before: Ningbo Oxfam intelligent commercial air conditioning manufacturing Co.,Ltd. |