CN108361178B - Oil-gas separation type noise reduction swash plate type compressor - Google Patents
Oil-gas separation type noise reduction swash plate type compressor Download PDFInfo
- Publication number
- CN108361178B CN108361178B CN201810254137.8A CN201810254137A CN108361178B CN 108361178 B CN108361178 B CN 108361178B CN 201810254137 A CN201810254137 A CN 201810254137A CN 108361178 B CN108361178 B CN 108361178B
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- China
- Prior art keywords
- exhaust
- oil return
- oil
- pressure stabilizing
- cavity
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- 238000000926 separation method Methods 0.000 title claims abstract description 25
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 52
- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000005192 partition Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005461 lubrication Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 33
- 230000006641 stabilisation Effects 0.000 abstract description 4
- 238000011105 stabilization Methods 0.000 abstract description 4
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 62
- 238000000034 method Methods 0.000 description 8
- 239000010725 compressor oil Substances 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses an oil-gas separation type noise reduction swash plate type compressor, which comprises a crank cavity, a rear cylinder and an exhaust port arranged on the rear cylinder, wherein an air inlet end of the exhaust port is communicated with a second exhaust pressure stabilizing zone, the second exhaust pressure stabilizing zone is connected with a first exhaust pressure stabilizing zone through a partition plate, and the first exhaust pressure stabilizing zone is communicated with an exhaust channel of the rear cylinder; the middle of the partition plate is provided with an installation cavity, and an oil return device is embedded in the installation cavity. The discharged refrigerant gas is discharged through primary pressure stabilization and secondary pressure stabilization after expansion, so that the refrigerant gas is more stable, the generated noise is smaller, and the purpose of further noise reduction is achieved; at the same time, oil in the refrigerant gas is separated out and enters the crank chamber for lubricating the parts.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to an oil-gas separation type noise reduction swash plate type compressor.
Background
The compressor is a heart of a refrigerating system, and sucks low-temperature and low-pressure refrigerant gas from the air suction pipe, drives the piston to compress the refrigerant gas through motor operation, and then discharges the high-temperature and high-pressure refrigerant gas to the air discharge pipe to provide power for the refrigerating cycle, so that the refrigerating cycle of compression, condensation (heat release), expansion and evaporation (heat absorption) is realized. The current compressor widely used in automobiles is a swash plate type compressor, which is a compressor that drives pistons or piston rods to reciprocate by means of the rotary motion of a swash plate inclined to a certain degree with a rotating shaft so as to realize gas compression.
Along with the development of technology, the requirements of miniaturization and light weight of vehicles are increasingly improved, and energy conservation and environmental protection are also required. Therefore, the space of the engine cabin is compact, so that the compressor is required to meet the requirement of equivalent refrigeration effect and good comfort.
The swash plate compressor consists of mainly swash plate, two cylinders assembled on the swash plate and connected together, pistons, and front and back cylinder covers installed on the outer ends of the cylinders. However, the inside of the compressor is easy to lack of refrigerating oil, so that moving parts of the compressor are worn early and have low service life; in addition, for the whole vehicle air conditioning system, when the refrigerating oil is discharged into the air conditioning system from the inside of the compressor, the air conditioning system has more oil content, which can prevent the heat exchange capacity of the system from reducing the refrigerating effect; secondly, the high-temperature and high-pressure refrigerant gas is directly discharged through the pressure stabilizing areas of the front and rear cylinder blocks, so that the unstable discharge pulsation forms noise and increases the power consumption of the compressor.
Disclosure of Invention
The invention aims to provide an oil-gas separation type noise reduction swash plate type compressor, which separates oil in refrigerant gas, reduces pulsation of air flow in the exhaust process and achieves the aim of reducing noise.
The technical scheme of the invention is as follows:
The oil-gas separation type noise reduction swash plate type compressor comprises a crank cavity, a rear cylinder and an exhaust port arranged on the rear cylinder, wherein an air inlet end of the exhaust port is communicated with a second exhaust pressure stabilizing zone, the second exhaust pressure stabilizing zone is connected with a first exhaust pressure stabilizing zone through a partition plate, and the first exhaust pressure stabilizing zone is communicated with an exhaust channel of the rear cylinder; the middle of the partition plate is provided with an installation cavity, and an oil return device is embedded in the installation cavity.
Further, the oil return device is positioned at one end of the installation cavity, and the installation cavity positioned at the bottom end of the oil return device forms an exhaust expansion part; the oil return device comprises an oil return device, a plug and an oil return groove, and an oil-gas separation cavity is formed between the oil return device and the plug; the oil-gas separation cavity is communicated with the first exhaust pressure stabilizing zone through a first exhaust passage, the air passage of the oil return device is communicated with the exhaust expansion part, and the exhaust expansion part is communicated with the second exhaust pressure stabilizing zone through a second exhaust passage.
In a further scheme, the oil return groove is communicated with the crank cavity through an oil return channel, gas in the first exhaust pressure stabilizing region is subjected to gas-liquid separation through an oil return device, oil enters the crank cavity through the oil return channel for lubrication, gas enters the exhaust expansion part for expansion, then enters the second exhaust pressure stabilizing region through a second exhaust channel for noise reduction, and finally is discharged through an exhaust port.
Further, the cross-sectional area of the exhaust expansion part is larger than the cross-sectional area of the air passage of the oil return device or larger than the cross-sectional area of the second exhaust passage.
The application is improved on the basis of ZL201410224443.9, and the front cylinder cover and the rear cylinder cover have the same structure, and are not further described. The application only improves the exhaust pressure stabilizing area of the rear cylinder, divides the original exhaust pressure stabilizing area into two parts by using a partition board, and is provided with an installation cavity in which an oil return device and an exhaust expansion part are embedded.
The exhaust process is as follows:
the refrigerant gas exhausted from the exhaust cavities of the front cylinder cover and the rear cylinder cover respectively enters the first exhaust pressure stabilizing region from the front cylinder exhaust channel in the front cylinder and the rear cylinder exhaust channel in the rear cylinder, two high-pressure airflows are buffered in the first exhaust pressure stabilizing region and then enter the oil-gas separation cavity in the oil return device through the first exhaust channel, and the high-temperature high-pressure refrigerant gas S-shaped returns around the oil return device to rotate at high speed to generate larger centrifugal force, so that compressor oil in the refrigerant gas splashes onto the inner wall of the oil-gas separation cavity under the action of the centrifugal force; then converging the refrigerant gas in the oil return cavity into the oil return groove under the action of gravity, and leading the compressor oil in the oil return groove to enter the crank cavity through an oil return channel with a small aperture under the action of pressure difference because the pressure of the refrigerant gas in the oil return cavity is higher than that of the crank cavity; oil entering the crank cavity is directly used for lubricating the internal moving parts, so that the abrasion of the moving parts is improved; the cooling effect can be achieved, so that the service life of the compressor is prolonged; and effectively avoid it to get into the suction cavity through preceding, back cylinder cap, reentrant jar hole, can lead to the hydraulic shock to lead to the valve block to fracture when oil directly gets into jar hole, influence compressor life.
Meanwhile, the refrigerant gas separated by the oil return device enters the exhaust expansion part through the air hole on the oil return device to be expanded, then enters the second exhaust pressure stabilizing area through the second exhaust channel to be stabilized again, and finally the refrigerant gas subjected to secondary pressure stabilization is discharged through the exhaust port, so that the exhaust process is realized.
The exhaust pressure stabilizing area in the existing rear cylinder is divided into two exhaust pressure stabilizing areas through the partition plate, the bottom end of the oil return device is provided with the exhaust expansion part, the discharged refrigerant gas passes through the first exhaust pressure stabilizing area and then is subjected to oil separation, and then is expanded through the exhaust expansion part and then enters the second exhaust pressure stabilizing area to be subjected to secondary pressure stabilizing and discharging, so that the refrigerant gas is more stable, the generated noise is smaller, and the aim of further reducing noise is fulfilled.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
FIG. 1 is a side view of a compressor of the present invention;
FIG. 2 is an inside view of the rear cylinder of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is an enlarged view at B in FIG. 3;
FIG. 5 is a side cross-sectional view of the compressor of FIG. 2;
Fig. 6 is an enlarged view at C in fig. 5.
In the figure: 1-front cylinder cover, 2-front cylinder, 21-front cylinder exhaust channel; 3-exhaust port, 4-rear cylinder, 41-first exhaust pressure stabilizing region, 42-partition, 43-second exhaust pressure stabilizing region, 44-mounting cavity, 45-first exhaust passage, 46-second exhaust passage, 47-rear cylinder exhaust passage, 48-oil return passage; 5-air suction ports and 6-rear cylinder covers; 7-oil return device, 71-oil return device, 72-plug, 73-oil return groove, 74-oil-gas separation cavity and 76-exhaust expansion part; 8-crank chamber.
Detailed Description
As shown in fig. 1-6, an oil-gas separation type noise reduction swash plate type compressor comprises a crank chamber 8, a rear cylinder 4 and an exhaust port 3 arranged on the rear cylinder 4, wherein the air inlet end of the exhaust port 3 is communicated with a second exhaust pressure stabilizing zone 43, the second exhaust pressure stabilizing zone 43 is connected with a first exhaust pressure stabilizing zone 41 through a partition plate 42, and the first exhaust pressure stabilizing zone 41 is communicated with a rear cylinder exhaust channel 47; a mounting cavity 44 is formed in the middle of the partition plate 42, and an oil return device 7 is embedded in the mounting cavity 44.
Further, the oil return device 7 is positioned at one end of the installation cavity 44, and the installation cavity 44 positioned at the bottom end of the oil return device 7 forms an exhaust expansion part 76; the oil return device 7 comprises an oil return device 71, a plug 72 and an oil return groove 73, and an oil-gas separation cavity 74 is formed between the oil return device 71 and the plug 72; the oil-gas separation chamber 74 communicates with the first exhaust gas pressure stabilizing zone 41 through the first exhaust passage 45, the gas passage of the oil return 71 communicates with the exhaust gas expansion portion 76, and the exhaust gas expansion portion 76 communicates with the second exhaust gas pressure stabilizing zone 43 through the second exhaust passage 46.
Further, the oil return groove 73 is communicated with the crank chamber 8 through the oil return channel 48, and after gas in the first exhaust pressure stabilizing region 41 is subjected to gas-liquid separation through the oil return device 7, oil enters the crank chamber 8 through the oil return channel 48 for lubrication, gas enters the exhaust expansion part 76 for expansion, enters the second exhaust pressure stabilizing region 43 through the second exhaust channel 46 for noise reduction, and finally is discharged through the exhaust port 3.
The cross-sectional area of the exhaust expansion portion 76 is larger than the cross-sectional area of the gas passage of the oil return device or larger than the cross-sectional area of the second exhaust passage 46, and is used for expanding the condensate gas after the gas-liquid separation by the oil return device 71.
The application is improved on the basis of ZL201410224443.9, and the front cylinder cover and the rear cylinder cover have the same structure, and are not further described. The application only improves the exhaust pressure stabilizing area of the rear cylinder, divides the original exhaust pressure stabilizing area into two parts by using a partition board, and is provided with an installation cavity in which an oil return device and an exhaust expansion part are embedded.
The air suction process is as follows:
the refrigerant gas introduced from the suction port 5 enters the suction expansion portion having a large volume through the rear cover suction passage, and the pulsation pressure of the refrigerant gas is reduced. Then, the refrigerant gas enters the suction pressure stabilizing region for buffering, then enters the main expansion channel in the rear cylinder, enters the suction channel of the rear cylinder through a plurality of auxiliary expansion channels, and then enters the suction cavity of the rear cover and the crank cavity respectively; the refrigerant gas in the crank chamber 8 passes through the front cylinder suction passage and enters the front cover suction chamber. When the swash plate is driven to rotate, the pistons are driven to do reciprocating motion in the cylinder holes in the front cylinder 2 and the rear cylinder 4, a suction cavity is formed at one end of each piston, a compression cavity is formed at the other end of each piston, and refrigerant gas in the suction cavities in the front cylinder cover and the rear cylinder cover is sucked into the suction cavities by the pistons through the front valve plate and the rear valve plate to realize the suction process.
During the suction process, the refrigerant gas simultaneously enters the rear cover suction cavity of the rear cylinder cover, the crank shaft cavity and the front cover suction cavity of the front cylinder cover through a plurality of auxiliary expansion channels in the rear cylinder. The refrigerant gas is sucked into the suction cavity in steps by a plurality of auxiliary expansion channels, so that the sucked refrigerant gas can more stably and effectively reduce air flow pulsation, namely noise.
The exhaust process is as follows:
The refrigerant gas exhausted from the exhaust cavities of the front cylinder cover 1 and the rear cylinder cover 6 respectively enter the first exhaust pressure stabilizing area 41 from the front cylinder exhaust channel 21 in the front cylinder 2 and the rear cylinder exhaust channel 47 of the rear cylinder 4, two high-pressure air flows are buffered in the first exhaust pressure stabilizing area 41, then enter the oil-gas separation cavity 74 in the oil return device through the first exhaust channel 45, and the high-temperature high-pressure refrigerant gas rotates around the oil return device at a S-shaped high speed (as shown by a dotted arrow in fig. 4) to generate a larger centrifugal force, so that compressor oil in the refrigerant gas splashes onto the inner wall of the oil-gas separation cavity 74 under the action of the centrifugal force; then the refrigerant gas in the oil return cavity is higher than the pressure of the crank cavity, so that the compressor oil in the oil return cavity enters the crank cavity 8 through the oil return channel 48 with a small aperture under the action of pressure difference; oil entering the crank cavity is directly used for lubricating the internal moving parts to improve the abrasion of the moving parts, and can play a role in reducing the temperature to prolong the service life of the compressor; the suction cavity entering the cylinder hole from the front cylinder cover and the rear cylinder cover is effectively avoided, and the oil directly enters the cylinder hole to cause liquid impact so as to lead the valve plate to be broken and the service life of the compressor to be prolonged.
Meanwhile, the refrigerant gas separated by the oil return device enters the exhaust expansion part through the air hole on the oil return device to expand, then enters the second exhaust pressure stabilizing area through the second exhaust channel to be stabilized again, and finally the refrigerant gas subjected to secondary pressure stabilization is discharged through the exhaust port, so that the exhaust process is realized.
The exhaust pressure stabilizing area in the existing rear cylinder is divided into two exhaust pressure stabilizing areas through the partition plate, the exhaust expansion part is arranged at the bottom of the oil return device, and the discharged refrigerant gas is discharged after sequentially passing through the primary pressure stabilizing, the expansion and the secondary pressure stabilizing, so that the refrigerant gas is more stable, the generated noise is smaller, and the purpose of further noise reduction is achieved.
The present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations made by the skilled person on the basis of the present invention are intended to fall within the scope of the present invention.
Claims (2)
1. The utility model provides an oil-gas separation formula of making an uproar swash plate compressor that falls, includes bent axle chamber (8), back cylinder (4) and locates gas vent (3) on back cylinder (4), its characterized in that: the air inlet end of the air outlet (3) is communicated with a second air exhaust pressure stabilizing area (43), the second air exhaust pressure stabilizing area (43) is connected with a first air exhaust pressure stabilizing area (41) through a partition plate (42), the first air exhaust pressure stabilizing area (41) is communicated with a front cylinder air exhaust channel (21) through a front cover air exhaust cavity, and the first air exhaust pressure stabilizing area (41) is communicated with a rear cylinder air exhaust channel (47) through a rear cover air exhaust cavity; an installation cavity (44) is formed in the middle of the partition plate (42), and an oil return device (7) is embedded in the installation cavity (44);
The oil return device (7) is positioned at one end of the installation cavity (44), and an exhaust expansion part (76) is formed in the space of the installation cavity (44) positioned at the bottom end of the oil return device (7); the oil return device (7) comprises an oil return device (71), a plug (72) and an oil return groove (73), and an oil-gas separation cavity (74) is formed between the oil return device (71) and the plug (72); the oil-gas separation cavity (74) is communicated with the first exhaust pressure stabilizing zone (41) through a first exhaust passage (45), the gas passage of the oil return device (71) is communicated with an exhaust expansion part (76), and the exhaust expansion part (76) is communicated with the second exhaust pressure stabilizing zone (43) through a second exhaust passage (46);
The oil return groove (73) is communicated with the crank cavity (8) through an oil return channel (48), gas in the first exhaust pressure stabilizing region (41) is subjected to gas-liquid separation through the oil return device (7), oil enters the crank cavity (8) through the oil return channel (48) for lubrication, gas enters the exhaust expansion part (76) for expansion, enters the second exhaust pressure stabilizing region (43) through the second exhaust channel (46) for noise reduction, and finally is discharged through the exhaust port (3).
2. The oil and gas separation type noise reduction swash plate type compressor according to claim 1, wherein: the cross-sectional area of the exhaust expansion portion (76) is larger than the cross-sectional area of the air passage of the oil return device or larger than the cross-sectional area of the second exhaust passage (46).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810254137.8A CN108361178B (en) | 2018-03-26 | 2018-03-26 | Oil-gas separation type noise reduction swash plate type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810254137.8A CN108361178B (en) | 2018-03-26 | 2018-03-26 | Oil-gas separation type noise reduction swash plate type compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108361178A CN108361178A (en) | 2018-08-03 |
| CN108361178B true CN108361178B (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810254137.8A Active CN108361178B (en) | 2018-03-26 | 2018-03-26 | Oil-gas separation type noise reduction swash plate type compressor |
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| Country | Link |
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| CN (1) | CN108361178B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1187584A (en) * | 1996-09-30 | 1998-07-15 | 株式会社丰田自动织机制作所 | Double headed piston type compressor |
| CN103994047A (en) * | 2014-05-26 | 2014-08-20 | 合肥达因汽车空调有限公司 | Rotating inclined disc type compressor |
| CN206522242U (en) * | 2017-02-24 | 2017-09-26 | 珠海格力节能环保制冷技术研究中心有限公司 | Horizontal type scroll compressor |
| CN208073712U (en) * | 2018-03-26 | 2018-11-09 | 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 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1008759B (en) * | 1986-04-03 | 1990-07-11 | 三电有限公司 | A kind of Piston Refrigerant Compreessor |
| JPH02230980A (en) * | 1989-03-02 | 1990-09-13 | Toyota Autom Loom Works Ltd | Swash plate type compressor |
| US5795139A (en) * | 1995-03-17 | 1998-08-18 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Swash plate type refrigerant compressor with improved internal lubricating system |
| JP3331829B2 (en) * | 1995-08-21 | 2002-10-07 | 株式会社豊田自動織機 | Compressor |
| KR100659570B1 (en) * | 2003-02-18 | 2006-12-19 | 한라공조주식회사 | Compressor |
| CN2674118Y (en) * | 2003-11-23 | 2005-01-26 | 广西玉柴机器股份有限公司 | Gasoline separating device |
| CN101315069B (en) * | 2007-06-01 | 2011-05-18 | 汉拏空调株式会社 | Variable capacity swash plate type compressor |
| EP2088318A1 (en) * | 2008-02-05 | 2009-08-12 | Kabushiki Kaisha Toyota Jidoshokki | Swash plate compressor |
| KR20170071048A (en) * | 2015-12-15 | 2017-06-23 | 이래오토모티브시스템 주식회사 | Swash plate compressor with oil separator |
-
2018
- 2018-03-26 CN CN201810254137.8A patent/CN108361178B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1187584A (en) * | 1996-09-30 | 1998-07-15 | 株式会社丰田自动织机制作所 | Double headed piston type compressor |
| CN103994047A (en) * | 2014-05-26 | 2014-08-20 | 合肥达因汽车空调有限公司 | Rotating inclined disc type compressor |
| CN206522242U (en) * | 2017-02-24 | 2017-09-26 | 珠海格力节能环保制冷技术研究中心有限公司 | Horizontal type scroll compressor |
| CN208073712U (en) * | 2018-03-26 | 2018-11-09 | 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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| Publication number | Publication date |
|---|---|
| CN108361178A (en) | 2018-08-03 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20240522 Address after: No. 36 Shushan Avenue, Shushan Modern Industrial Park, Shouxian County, Huainan City, Anhui Province, 232221 Applicant after: Anhui Dayin Automobile Air Conditioning Co.,Ltd. Country or region after: China Address before: No. 7 Shinan Road, Baiyan Science and Technology Park, High tech Zone, Shushan District, Hefei City, Anhui Province, 230088 Applicant before: HEFEI DYNE AUTOMOTIVE AIR CONDITIONING CO.,LTD. Country or region before: China |
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