CN103994047B - A kind of swash-plate-type compressor - Google Patents
A kind of swash-plate-type compressor Download PDFInfo
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- CN103994047B CN103994047B CN201410224443.9A CN201410224443A CN103994047B CN 103994047 B CN103994047 B CN 103994047B CN 201410224443 A CN201410224443 A CN 201410224443A CN 103994047 B CN103994047 B CN 103994047B
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Abstract
The present invention provides a kind of swash-plate-type compressor, is provided with air-breathing bulge in the middle of bonnet discharge chamber, and the bonnet air intake passage connected with air entry is positioned at inside described air-breathing bulge, and the air-breathing bulge port of export connects with air-breathing voltage stabilizing district；Being provided with the main inflation channel communicated with air-breathing voltage stabilizing district in exhaust casing, main inflation channel is connected with rear cylinder air intake passage by secondary expansion passage, and rear cylinder air intake passage communicates with described bonnet suction muffler, crankshaft cavity respectively；Forming the front cylinder air intake passage communicated with crankshaft cavity in front cylinder, front cylinder air intake passage communicates with the protecgulum suction muffler of front end housing.Make during air-breathing in the protecgulum suction muffler of bonnet suction muffler, crankshaft cavity and front end housing that refrigerant gas simultaneously enters back cylinder cover by the some secondary expansion passages in exhaust hood.Make refrigerant gas divide multiple secondary expansion passage, be inhaled into step by step, so that the refrigerant gas sucked is more steady, thus be effectively reduced gas and noise.
Description
Technical field
The present invention relates to Compressor Technology field, be specifically related to a kind of swash-plate-type compressor.
Background technology
Compressor is the heart of refrigeration system, it sucks the refrigerant gas of low-temp low-pressure from air intake duct, after driving piston that it is compressed by motor rotation, the refrigerant gas of HTHP is discharged to blast pipe, there is provided power for kind of refrigeration cycle, thus realize the kind of refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption).And the compressor being now widely used in automobile is swash-plate-type compressor, it is dependent on reciprocating to realize the compressor of gas compression with rotating shaft rotational movement piston or piston rod in the swash plate of certain inclination.
Swash-plate-type compressor mainly by swash plate, be assemblied on swash plate and two cylinders, pistons linking together and the front end housing being arranged on cylinder two outer end linked together and back cylinder cover.Its structure is as shown in Figure 1, refrigerant gas is directly entered the bonnet suction muffler 44 of back cylinder cover 40 by air entry 41, crank chamber 90 is entered, subsequently in the protecgulum suction muffler 11 of front end housing 10 with the narrow air intake passage 23,35 within exhaust casing 30 by front cylinder 20.The last compression chamber respectively enteing forward and backward cylinder cap again is compressed, and compressed gas in the compression chamber of forward and backward cylinder cap can be made by the air intake passage between two cylinders to circulate mutually.Drive swash plate rotate and make piston start forward, back cylinder cover moves reciprocatingly, and then drains into outside from gas outlet again by discharge chamber.The swash-plate-type compressor of this structure has the disadvantage in that
1, refrigerant gas is to circulate in the suction muffler of suction muffler, crankshaft cavity and the back cylinder cover of front end housing, there is pressure imbalance phenomenon, be easily caused compressor moving component premature wear in making these three cavity.
2, owing to being provided with valve plate device between back cylinder cover and exhaust casing, and being located in the air intake passage within valve plate the stay bolt being provided with for connecting, so that air intake passage is narrow and long, this structure hinders the flowing of refrigerant gas, ultimately causes the pressure loss.
3, the inwall of air intake passage can be collided in the process of circulation due to refrigerant gas, air pulsing can be caused unstable and form noise, thus also increase the power consumption of compressor.
4, refrigerant gas is directly entered back cylinder cover suction muffler by air entry, it is possible to can there is liquid hit phenomenon and cause valve plate device causes intense impact make valve block rupture, so that compressor failure.
5, minimizing along with vehicle, the cabin of engine is the compactest, and sometimes add suction and exhaust ports device in periphery be impossible simultaneously, exhaust outlet need to be arranged on back cylinder cover to meet installing space.Extend exhaust passage, make the discharge shakiness of refrigerant gas, discharge pressure reduce, also can produce noise.
Summary of the invention
It is an object of the invention to provide a kind of swash-plate-type compressor, it is ensured that refrigerant gas pressure kept in balance all the time in the bonnet suction muffler of protecgulum suction muffler, crankshaft cavity and the back cylinder cover of front end housing, effectively reduce the pulsation of air-flow, reduce noise.
The technical scheme is that
A kind of swash-plate-type compressor, including the front cylinder, exhaust casing and the crankshaft cavity that interconnect, and for closing front end housing and the back cylinder cover of forward and backward cylinder end, and it is located at the exhaust outlet of the cold-producing medium of front cylinder or exhaust casing outer surface and is located at the refrigerant suction mouth of back cylinder cover outer surface；
Protecgulum discharge chamber in described front end housing is connected with the front cylinder exhaust passage in front cylinder by protecgulum exhaust passage, rear cylinder discharge chamber in described back cylinder cover is connected with the rear cylinder exhaust passage in exhaust casing by bonnet exhaust passage, and described front cylinder exhaust passage all connects with exhaust outlet with the outlet side of rear cylinder exhaust passage；
Bonnet suction muffler on described back cylinder cover is isolated by the first dividing plate with bonnet discharge chamber, is provided with air-breathing bulge in the middle of described bonnet discharge chamber, and described bonnet discharge chamber is isolated by second partition with air-breathing bulge；The bonnet air intake passage connected with air entry is positioned at inside described air-breathing bulge, and the described air-breathing bulge port of export connects with air-breathing voltage stabilizing district；
Being provided with the main inflation channel communicated with described air-breathing voltage stabilizing district in exhaust casing, described main inflation channel is connected with rear cylinder air intake passage by least one secondary expansion passage, and described rear cylinder air intake passage communicates with described bonnet suction muffler, crankshaft cavity respectively；
The front cylinder air intake passage communicated with described crankshaft cavity is formed in front cylinder；Described front cylinder air intake passage communicates with the protecgulum suction muffler of front end housing.
Further, described main inflation channel inwall offers a circle circlip groove, is provided with back-up ring in described circlip groove.The purpose of back-up ring is to prevent the bearing later stage abrasion inside exhaust casing from coming off, and causes compressor failure.
Preferably, described air-breathing voltage stabilizing district is formed at the inside of back cylinder cover and exhaust casing junction.
Preferably, described exhaust outlet is located at exhaust casing outer surface.
It is further preferred that the sectional area of described rear cylinder air intake passage and front cylinder air intake passage is equal.
Preferably, the sectional area of the main inflation channel in described exhaust casing is more than the sectional area of any secondary expansion passage.
Particularly, identical with the quantity that air intake passage inhaled by the rear cylinder in exhaust casing with the quantity of the secondary expansion passage that main inflation channel communicates in the present invention；After and, cylinder air intake passage is equal with the quantity of front cylinder air intake passage, is the most all identical with the cylinder holes number of selected cylinder.
In the present invention, gas extraction system is more optimizedly, and described front cylinder exhaust passage all connects with exhaust voltage stabilizing district with the outlet side of rear cylinder exhaust passage, and described exhaust voltage stabilizing district connects with exhaust outlet.Achieve buffering exhaust, reduce the injury to compressor.
Exhaust voltage stabilizing district in the present invention can be located at the inside of front cylinder or exhaust casing, it is possible to is located on the peripheral surface of front cylinder or exhaust casing.
The breathing process of the compressor of the present invention is as follows:
The refrigerant gas of compressor enters from air entry, enters air-breathing bulge from bonnet air intake passage the most afterwards, enters the main inflation channel of exhaust casing after buffering subsequently into air-breathing voltage stabilizing district, enters several secondary expansion passages from main inflation channel；Cylinder air intake passage after secondary expansion passage refrigerant gas out enters, then respectively enters in bonnet suction muffler and crankshaft cavity；Refrigerant gas in crankshaft cavity enters back into front cylinder air intake passage, subsequently into protecgulum suction muffler.Thus driven in piston each cylinder holes in front cylinder and exhaust casing when swash plate drives rotation and move reciprocatingly, by forward and backward valve plate, the refrigerant gas inspiration suction chamber in the suction muffler of front end housing or back cylinder cover is realized breathing process by piston.Owing to reciprocating piston is bidirectional piston, a portion piston is towards front end housing one end motion, the piston of another part then moves to back cylinder cover one end by swash plate simultaneously, and during so one end of piston realizes air-breathing, the other end then defines the exhaust of compression chamber.
So during compressor air suction, in the protecgulum suction muffler of bonnet suction muffler, crankshaft cavity and front end housing that refrigerant gas simultaneously enters back cylinder cover by the some secondary expansion passages in exhaust hood.Refrigerant gas is made to divide multiple secondary expansion passage, be inhaled into step by step, so that the refrigerant gas sucked more steadily effectively reduces gas.
Simultaneously, owing to the sectional area of the air intake passage in forward and backward cylinder is equal and can be effectively controlled, thus can ensure that refrigerant gas can kept in balance all the time at the pressure of the protecgulum suction muffler of the pressure of bonnet suction muffler, the pressure of crankshaft cavity and the front end housing of back cylinder cover, effectively reduce the pulsation of air-flow, reduce noise.
Additionally, owing to air-breathing bulge, air-breathing voltage stabilizing district, main inflation channel volume are all big than bonnet air intake passage, refrigerant gas passes sequentially through air-breathing bulge, air-breathing voltage stabilizing district, main inflation channel, the suction muffler of the secondary expansion passage forward and backward cylinder cap of entrance and crankshaft cavity after air entry enters, thus effectively reduces the fluctuation pressure in the refrigerant gas process of circulation.
The exhaust process of the compressor of the present invention is: the gas of discharge passes sequentially through forward and backward valve plate device and respectively enterd the discharge chamber of forward and backward cylinder cap, sequentially passes through bonnet exhaust passage, entrance exhaust voltage stabilizing district, rear cylinder exhaust passage in the bonnet discharge chamber of back cylinder cover after gas collection；The protecgulum discharge chamber of front end housing sequentially passes through after gas collection protecgulum exhaust passage and front cylinder exhaust passage discharged by exhaust outlet after exhaust voltage stabilizing district buffering also into exhaust voltage stabilizing district, two strands of high pressure draughts.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the present invention is described in further detail.
Fig. 1 is the sectional view of compressor in prior art；
Fig. 2 is the compressor side view of the present invention；
Fig. 3 is the side sectional view during air-breathing of compressor in Fig. 2；
Fig. 4 is the side sectional view during exhaust of compressor in Fig. 2；
Fig. 5 is the inner side view of the exhaust casing of the present invention；
Fig. 6 is the inner side view of the front end housing of the present invention；
Fig. 7 is the inner side view of the back cylinder cover of the present invention；
Another kind of side sectional view when Fig. 8 is the exhaust of compressor in Fig. 2.
In figure: 10-front end housing, 11-protecgulum suction muffler, 12-protecgulum discharge chamber, 13-protecgulum exhaust passage；Cylinder before 20-, 21-compression chamber, cylinder air intake passage before 22-, cylinder exhaust passage before 23-；30-exhaust casing, 31-exhaust outlet, cylinder air intake passage after 32-, 33-secondary expansion passage, the main inflation channel of 34-, cylinder exhaust passage after 35-, 36-circlip groove, 37-back-up ring, 38-suction chamber, 39-is vented voltage stabilizing district；40-back cylinder cover, 41-air entry, 42-bonnet air intake passage, 43-air-breathing bulge, 44-bonnet suction muffler, 45-bonnet discharge chamber, 46-bonnet exhaust passage, 47-the first dividing plate, 48-second partition；Valve plate before 50-；Valve plate after 60-；70-swash plate；80-piston；90-crankshaft cavity；100-air-breathing voltage stabilizing district；110-bearing.
Detailed description of the invention
As shown in Figure 2,3, a kind of getter device of swash-plate-type compressor, including the front cylinder 20 interconnected, exhaust casing 30 and crankshaft cavity 90, and for closing front end housing 10 and the back cylinder cover 40 of forward and backward cylinder end, front end housing 10 is connected with front cylinder 20 by front valve plate 50, and exhaust casing 30 is connected with back cylinder cover 40 by rear valve plate 60；And be located at the exhaust outlet 31 of the cold-producing medium of exhaust casing outer surface and be located at the refrigerant suction mouth 41 of back cylinder cover 40 outer surface.Swash plate 70, bearing 110 and the piston 80 being arranged in forward and backward cylinder.
Preferably, air-breathing voltage stabilizing district 100 is formed at the inside of back cylinder cover 40 and exhaust casing 30 junction.
Second situation is, ibid, simply the exhaust outlet 31 of cold-producing medium is located at the outer surface of front cylinder to structure.
Such as Fig. 3, shown in 5, exhaust casing 30 outer surface is provided with the exhaust outlet 31 of cold-producing medium；The main inflation channel 34 communicated with described air-breathing voltage stabilizing district 100 it is provided with in exhaust casing 30, described main inflation channel 34 is connected with rear cylinder air intake passage 32 by secondary expansion passage 33, and described rear cylinder air intake passage 32 communicates with described bonnet suction muffler 44, crankshaft cavity 90 respectively；Being provided with rear cylinder exhaust passage 35 in exhaust casing 30, described main inflation channel 34 inwall offers a circle circlip groove 36, is provided with back-up ring 37 and comes off for preventing the later stage of the bearing 110 inside exhaust casing from wearing and tearing and cause compressor failure in described circlip groove 36.
As shown in Figure 6, the rear aperture of front end housing 10 is assemblied on front cylinder, and the front wall inner surface of front end housing 10 is provided with protecgulum suction muffler 11, protecgulum discharge chamber 12, and between which is separated by dividing plate.Being provided with protecgulum exhaust passage 13 in protecgulum discharge chamber 12, the compression refrigerant gas flowed out from cylinder is discharged outside compressor by protecgulum exhaust passage 13.
Such as Fig. 3, shown in 7, the front opening of back cylinder cover 40 is assemblied on exhaust casing, back cylinder cover 40 outer surface is provided with refrigerant suction mouth 41, bonnet suction muffler 44 on the rear wall inner surface of back cylinder cover 40 is isolated by the first dividing plate 47 with bonnet discharge chamber 45, be provided with air-breathing bulge 43 in the middle of described bonnet discharge chamber 45, periphery is provided with bonnet exhaust passage 46, and described bonnet discharge chamber 45 is isolated by second partition 48 with air-breathing bulge 43；It is internal that the bonnet air intake passage 42 connected with air entry 41 is positioned at described air-breathing bulge 43, and described air-breathing bulge 43 port of export connects with air-breathing voltage stabilizing district.First dividing plate 47, the shape of second partition 48 are often closed curve shape, are positioned on the outer face of bonnet discharge chamber 45.
Compressor air suction process is as shown in Figure 3: set air-breathing bulge 43 in the middle of the bonnet discharge chamber 45 of back cylinder cover 40, the refrigerant gas come in from air entry 41 enters, through bonnet air intake passage 42, the air-breathing bulge 43 that volume is bigger, reduces the fluctuation pressure of refrigerant gas.Then, refrigerant gas enters back into and enters the main inflation channel 34 in exhaust casing 30 after buffering in air-breathing voltage stabilizing district 100, then is connected by cylinder air intake passage 32 after the entrance of multiple secondary expansion passages 33；Refrigerant gas through after respectively enter in bonnet suction muffler 44 and crankshaft cavity 90 after cylinder air intake passage 32；Refrigerant gas in crankshaft cavity 90 enters in protecgulum suction muffler 11 through front cylinder air intake passage 22.Thus driven in piston 80 each cylinder holes in front cylinder 20 and exhaust casing 30 when swash plate 70 drives and rotates and move reciprocatingly, form suction chamber 38 in one end of piston 80, the other end forms compression chamber 21, and by front valve plate 50, rear valve plate 60, piston 80 will realize breathing process in the refrigerant gas inspiration suction chamber 38 in the suction muffler of front end housing 10 and back cylinder cover 40.
Preferred embodiment is, the sectional area of rear cylinder air intake passage 32 and front cylinder air intake passage 22 is equal.Thus ensure refrigerant gas pressure in bonnet suction muffler 44, crankshaft cavity 90 and protecgulum suction muffler 11 can kept in balance all the time, effectively reduce the pulsation of air-flow, reduce noise.
Particularly, the quantity of secondary expansion passage 33 is identical with the quantity of the rear cylinder air intake passage 32 in exhaust casing；After and, cylinder air intake passage 32 is equal with the quantity of front cylinder air intake passage 22, and is all identical with the cylinder holes number of selected cylinder.
It is further preferred that the sectional area of the main inflation channel 34 in described exhaust casing 30 is more than the sectional area of any secondary expansion passage 33.
The sectional area of the air-breathing bulge 43 of described back cylinder cover 40 is not less than the sectional area of bonnet air intake passage 42.
So during the compressor air suction of the present invention, in the protecgulum suction muffler of bonnet suction muffler, crankshaft cavity and front end housing that refrigerant gas simultaneously enters back cylinder cover by the some secondary expansion passages in exhaust hood.Refrigerant gas is made to divide multiple secondary expansion passage, be inhaled into suction chamber step by step, so that the refrigerant gas sucked more steadily effectively reduces gas.
The exhaust process of the swash-plate-type compressor of the present invention has two kinds of situations:
A kind of situation as shown in Figure 4, is provided with front cylinder exhaust passage 23, is provided with rear cylinder exhaust passage 35 in exhaust casing 30 in front cylinder 20, front cylinder exhaust passage 23, rear cylinder exhaust passage 35 all connect with exhaust voltage stabilizing district 39.Buffer so that entering exhaust voltage stabilizing district 39 from refrigerant gas the past cylinder exhaust passage 23 and the rear cylinder exhaust passage 35 respectively that the discharge chamber of front end housing 10 and back cylinder cover 40 is discharged, then discharge from exhaust outlet 31, it is achieved that exhaust process.
The second situation is as shown in Figure 8, its exhaust process is ibid, differ only in and be not vented voltage stabilizing district, its exhaust process is: be provided with front cylinder exhaust passage 23 in front cylinder 20, rear cylinder exhaust passage 35 it is provided with in exhaust casing 30, the refrigerant gas discharged from the discharge chamber of front end housing 10 and back cylinder cover 40 is directly discharged through exhaust outlet 31 with rear cylinder exhaust passage 35 the past cylinder exhaust passage 23 respectively, it is achieved that exhaust process.
Preferably, described exhaust voltage stabilizing district 39 is located at front cylinder 20 or the inside of exhaust casing 30, and it connects with front cylinder exhaust passage 23 and rear cylinder exhaust passage 35 respectively.
It is furthermore preferred that described exhaust voltage stabilizing district 39 is located on the peripheral surface of front cylinder 20 or exhaust casing 30, it connects with front cylinder exhaust passage 23 and rear cylinder exhaust passage 35 respectively.
Above example is not limited only to protection scope of the present invention, all basic thoughts based on the present invention and modify or change broadly fall into protection scope of the present invention.
Claims (8)
1. a swash-plate-type compressor, including the front cylinder (20) interconnected, exhaust casing (30) and crankshaft cavity (90), and for closing front end housing (10) and the back cylinder cover (40) of forward and backward cylinder end, and it is located at the exhaust outlet (31) of the cold-producing medium of front cylinder or exhaust casing outer surface and is located at the refrigerant suction mouth (41) of back cylinder cover (40) outer surface；
Protecgulum discharge chamber (12) in described front end housing (10) is connected with the front cylinder exhaust passage (23) in front cylinder (20) by protecgulum exhaust passage (13), bonnet discharge chamber (45) in described back cylinder cover (40) is connected with the rear cylinder exhaust passage (35) in exhaust casing (30) by bonnet exhaust passage (46), and described front cylinder exhaust passage (23) all connects with exhaust outlet (31) with the outlet side of rear cylinder exhaust passage (35)；
It is characterized in that: the bonnet suction muffler (44) on described back cylinder cover (40) is isolated by the first dividing plate (47) with bonnet discharge chamber (45), being provided with air-breathing bulge (43) in the middle of described bonnet discharge chamber (45), described bonnet discharge chamber (45) is isolated by second partition (48) with air-breathing bulge (43)；It is internal that the bonnet air intake passage (42) connected with air entry (41) is positioned at described air-breathing bulge (43), and described air-breathing bulge (43) port of export connects with air-breathing voltage stabilizing district (100)；
The main inflation channel (34) communicated with described air-breathing voltage stabilizing district (100) it is provided with in exhaust casing (30), described main inflation channel (34) is connected with rear cylinder air intake passage (32) by least one secondary expansion passage (33), and described rear cylinder air intake passage (32) communicates with described bonnet suction muffler (44), crankshaft cavity (90) respectively；
The front cylinder air intake passage (22) communicated with described crankshaft cavity (90) is formed in front cylinder (20)；Described front cylinder air intake passage (22) communicates with the protecgulum suction muffler (11) of front end housing (10).
A kind of swash-plate-type compressor the most according to claim 1, it is characterised in that: described main inflation channel (34) inwall offers a circle circlip groove (36), is provided with back-up ring (37) in described circlip groove (36).
A kind of swash-plate-type compressor the most according to claim 1, it is characterised in that: described air-breathing voltage stabilizing district (100) is formed at the inside of back cylinder cover (40) and exhaust casing (30) junction.
A kind of swash-plate-type compressor the most according to claim 1, it is characterised in that: described exhaust outlet (31) is located at the outer surface of exhaust casing (30).
A kind of swash-plate-type compressor the most according to claim 1, it is characterised in that: the sectional area of described rear cylinder air intake passage (32) and front cylinder air intake passage (22) is equal.
A kind of swash-plate-type compressor the most according to claim 1, it is characterised in that: the sectional area of the main inflation channel (34) in described exhaust casing (30) is more than the sectional area of any secondary expansion passage (33).
A kind of swash-plate-type compressor the most according to claim 1, it is characterized in that: described front cylinder exhaust passage (23) all connects with exhaust voltage stabilizing district (39) with the outlet side of rear cylinder exhaust passage (35), and described exhaust voltage stabilizing district (39) connects with exhaust outlet (31).
A kind of swash-plate-type compressor the most according to claim 7, it is characterised in that: described exhaust voltage stabilizing district (39) is located on the inside of front cylinder (20) or the peripheral surface of the inside of exhaust casing (30) or front cylinder (20) or on the peripheral surface of exhaust casing (30).
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| CN201410224443.9A CN103994047B (en) | 2014-05-26 | 2014-05-26 | A kind of swash-plate-type compressor |
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| CN201410224443.9A CN103994047B (en) | 2014-05-26 | 2014-05-26 | A kind of swash-plate-type compressor |
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| CN103994047B true CN103994047B (en) | 2016-09-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114280A (en) * | 2015-09-18 | 2015-12-02 | 苏州中成汽车空调压缩机有限公司 | Two-way piston constant-displacement compressor |
| CN105201774B (en) * | 2015-10-14 | 2017-04-26 | 合肥达因汽车空调有限公司 | Low-noise rotating inclined disc type compressor |
| CN108361178A (en) * | 2018-03-26 | 2018-08-03 | 合肥达因汽车空调有限公司 | A kind of oil-gas separated-type noise reduction swash-plate-type compressor |
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| US5674054A (en) * | 1993-05-21 | 1997-10-07 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Reciprocating type compressor |
| US6045342A (en) * | 1997-02-25 | 2000-04-04 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Refrigerant compressor |
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Denomination of invention: Rotating inclined disc type compressor Effective date of registration: 20170103 Granted publication date: 20160907 Pledgee: Bank of Hangzhou Limited by Share Ltd. Hefei science and Technology Branch Pledgor: HEFEI DYNE AUTOMOTIVE AIR CONDITIONING CO.,LTD. Registration number: 2016340000158 |
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Date of cancellation: 20210226 Granted publication date: 20160907 Pledgee: Bank of Hangzhou Limited by Share Ltd. Hefei science and Technology Branch Pledgor: HEFEI DYNE AUTOMOTIVE AIR CONDITIONING Co.,Ltd. Registration number: 2016340000158 |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221202 Address after: 232200 No. 36 Shushan Avenue, Shushan modern industrial park, Shou county, Huainan City, Anhui Province Patentee after: Anhui Dayin Automobile Air Conditioning Co.,Ltd. Address before: No. 7, Shinan Road, Baiyan Science Park, High tech Zone, Hefei, Anhui 230088 Patentee before: HEFEI DYNE AUTOMOTIVE AIR CONDITIONING CO.,LTD. |