CN107036345A - Oil eliminator, condenser and air conditioner - Google Patents
Oil eliminator, condenser and air conditioner Download PDFInfo
- Publication number
- CN107036345A CN107036345A CN201710266263.0A CN201710266263A CN107036345A CN 107036345 A CN107036345 A CN 107036345A CN 201710266263 A CN201710266263 A CN 201710266263A CN 107036345 A CN107036345 A CN 107036345A
- Authority
- CN
- China
- Prior art keywords
- oil
- stream guidance
- spiral stream
- eliminator
- spiral
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
Abstract
The present invention discloses a kind of oil eliminator, condenser and air conditioner.The oil eliminator includes oil cylinder (1) and is arranged on the spiral stream guidance structure (2) of the axial screw extension in oil cylinder (1) and along oil cylinder (1), oil and gas import (3), oil return opening (4) and oil outlet (5) are provided with the side wall of oil cylinder (1), oil and gas import (3) is located at the screw terminal of spiral stream guidance structure (2), and oil return opening (4) and oil outlet (5) are located at the unscrewing end of spiral stream guidance structure (2).According to the oil eliminator of the present invention, it is possible to increase the inertial separation ability of oil eliminator, oil gas separation is improved.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of oil eliminator, condenser and air conditioner.
Background technology
Oil eliminator serves the effect of fine oil droplets in separation gaseous coolant in refrigeration unit, and principle, which includes hitting, is used to
Property separation, screening separation and adsorbing separation, it is intended to prevent that the oil droplet in compressor air-discharging from entering condenser, subsequently into evaporation
The problem of device, influence unit entirety efficiency.
External oil is for example vertical in the market, horizontal oil designs relative maturity, but as client is to unit
Integrated requirement gradually increase, the research and development of built-in oil are imperative, and the design of external oil eliminator often lays particular emphasis on oily separation
Efficiency, built-in oil not only needs to consider separative efficiency, also to take into account other design considerations such as space arrangement, system oil return.
Conventional internal oil eliminator is typically separated using simple baffle plate, largely reduces the ability of inertial separation,
Reduce oil gas separation.
The content of the invention
A kind of oil eliminator, condenser and air conditioner are provided in the embodiment of the present invention, it is possible to increase the inertia of oil eliminator
Separating capacity, improves oil gas separation.
To achieve the above object, the embodiment of the present invention provides a kind of oil eliminator, including oil cylinder and is arranged on oil
Oil gas is provided with the spiral stream guidance structure of axial screw extension in cylinder and along oil cylinder, the side wall of oil cylinder to enter
Mouth, oil return opening and oil outlet, oil and gas import are located at the screw terminal of spiral stream guidance structure, and oil return opening and oil outlet are located at spiral
The unscrewing end of flow-guiding structure.
Preferably, oil return opening is located at the bottom of oil cylinder, oil outlet is positioned at the top of oil cylinder.
Preferably, being formed with the oil-recovery tank for being connected to oil return opening between oil cylinder and the bottom of spiral stream guidance structure.
Preferably, the bottom of spiral stream guidance structure is provided with oil-recovery tank, the sectional area d1 of oil-recovery tank meets 4mm2≤d1
≤50mm2。
Preferably, spiral stream guidance structure is included between the spiral deflector that polylith is sequentially connected, polylith spiral deflector
It is fixedly connected by pull bar.
Preferably, being additionally provided with filter screen in oil cylinder, oil return opening is arranged on filter screen close to the one of spiral stream guidance structure
Side, oil outlet is arranged on side of the filter screen away from spiral stream guidance structure.
Preferably, being additionally provided with oil baffle in oil cylinder, oil baffle is arranged on filter screen away from spiral stream guidance structure
Side, oil baffle is smaller than or equal to 10cm with axial direction of the filter screen along oil cylinder.
Preferably, being provided with two spiral stream guidance structures, the hand of spiral of two spiral stream guidance structures in oil cylinder
On the contrary, oil and gas import is located between two spiral stream guidance structures, two oil return openings are located at the rotation of two spiral stream guidance structures respectively
Go out end.
According to another aspect of the present invention there is provided a kind of condenser, including housing and the oil separation being arranged in housing
Device, the oil eliminator is to be provided with condenser inlet on above-mentioned oil eliminator, housing, and condenser inlet is corresponding with oil and gas import
Set.
Preferably, axially spaced in housing be provided with multiple supporting plates, oil eliminator is set on the supporting plate.
Preferably, the length of oil cylinder is a1, the length of housing for a2, a1 and a2 meet 0.3a2≤a1≤
0.7a2。
Preferably, a diameter of b1 of oil cylinder, a diameter of b2, b1 and b2 of housing meet 0.1b2≤b1≤
0.7b2。
Preferably, the pitch of spiral stream guidance structure is c1, a diameter of c2, c1 and c2 of condenser inlet meet 0.5c2
≤c1≤2c2。
According to another aspect of the present invention there is provided a kind of air conditioner, including oil eliminator, the oil eliminator is above-mentioned
Oil eliminator.
Apply the technical scheme of the present invention, oil eliminator includes oil cylinder and is arranged in oil cylinder and along oil cylinder
Oil and gas import, oil return opening and oil are provided with the spiral stream guidance structure of the axial screw extension of body, the side wall of oil cylinder to go out
Mouthful, oil and gas import is located at the screw terminal of spiral stream guidance structure, and oil return opening and oil outlet are positioned at the unscrewing end of spiral stream guidance structure.
The oil eliminator employs spiral stream guidance structure, therefore can be by the spiral stream guidance effect of spiral stream guidance structure so that oil gas
During oil eliminator is entered helical rotation occurs for mixture, is centrifuged, and larger particles can be carried out preliminary
Separation, reduces oil eliminator afterbody filter screen oil droplet filtration yield, improves strainer filtering efficiency and filter effect, can also pass through spiral
Flow-guiding structure reduces the possibility of oil cylinder body bottom oil droplet reentrainment back-mixing so that the pressure drop of oil eliminator is relatively low, improves oil
The inertial separation ability of separator, improves oil gas separation.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the oil eliminator of first embodiment of the invention；
Fig. 2 is the dimensional structure diagram of the spiral stream guidance structure of the oil eliminator of first embodiment of the invention；
Fig. 3 is the structural representation of the spiral stream guidance structure of the oil eliminator of first embodiment of the invention；
Fig. 4 is the first structural representation of the spiral stream guidance structure of the oil eliminator of the first embodiment of the embodiment of the present invention
Figure；
Fig. 5 is second of structural representation of the spiral stream guidance structure of the oil eliminator of the first embodiment of the embodiment of the present invention
Figure；
Fig. 6 is the third structural representation of the spiral stream guidance structure of the oil eliminator of the first embodiment of the embodiment of the present invention
Figure；
Fig. 7 is the 4th kind of structural representation of the spiral stream guidance structure of the oil eliminator of the first embodiment of the embodiment of the present invention
Figure；
Fig. 8 is the dimensional structure diagram of the oil eliminator of second embodiment of the invention；
Fig. 9 is the structural representation of the oil eliminator of second embodiment of the invention；
Figure 10 is the dimensional structure diagram of the condenser of the embodiment of the present invention；
Figure 11 is the structural representation of the condenser of the embodiment of the present invention.
Description of reference numerals：1st, oil cylinder；2nd, spiral stream guidance structure；3rd, oil and gas import；4th, oil return opening；5th, oil goes out
Mouthful；6th, oil-recovery tank；7th, spiral deflector；8th, pull bar；9th, filter screen；10th, oil baffle；11st, housing；12nd, condenser inlet；13rd, prop up
Fagging.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but not as the limit to the present invention
It is fixed.
With reference to shown in referring to Fig. 1 to Fig. 7, according to the first embodiment of the present invention, oil eliminator includes oil cylinder 1 and set
Put and set on the spiral stream guidance structure 2 of the axial screw extension in oil cylinder 1 and along oil cylinder 1, the side wall of oil cylinder 1
Oil and gas import 3, oil return opening 4 and oil outlet 5 are equipped with, oil and gas import 3 is located at the screw terminal of spiral stream guidance structure 2, the He of oil return opening 4
Oil outlet 5 is located at the unscrewing end of spiral stream guidance structure 2.
The oil eliminator employs spiral stream guidance structure 2, therefore can be imitated by the spiral stream guidance of spiral stream guidance structure 2
Really so that during oil eliminator is entered helical rotation occurs for oil gas mixture, is centrifuged, can be to larger
Grain carries out initial gross separation, reduces oil eliminator afterbody filter screen oil droplet filtration yield, improves strainer filtering efficiency and filter effect, may be used also
With pass through spiral stream guidance structure reduce oil cylinder body bottom oil droplet reentrainment back-mixing possibility so that the pressure drop of oil eliminator compared with
It is low, the inertial separation ability of oil eliminator is improved, oil gas separation is improved.
Oil return opening 4 is located at the bottom of oil cylinder 1, and oil outlet 5 is located at the top of oil cylinder 1.Work as oil gas mixture
Completed in oil eliminator after separation, be divided into the larger oil droplet of density and the less gaseous coolant of density, gaseous coolant floats,
And flowed out at the oil outlet 5 at top, oil droplet falls, and is flowed out from the oil return opening 4 of bottom, can cause Oil-gas Separation more
Meet the physical characteristic of oil gas, separation is more thorough, be not susceptible to two degree of mixing.Certainly, oil outlet 5 can also be located at oil
Divide the side of cylinder 1, but its highly desirable height higher than oil return opening 4.
The oil-recovery tank 6 for being connected to oil return opening 4 is formed between the bottom of oil cylinder 1 and spiral stream guidance structure 2.Oil-recovery tank
6 can enable bottom lubricating oil to be flowed freely in bottom, thus at from each position to oil return opening 4 converge, finally from return
Flowed out at hydraulic fluid port 4, improve the flow efficiency of lubricating oil, it is to avoid flowing of the spiral stream guidance structure 2 to lubricating oil causes to hinder, it is ensured that
The reflowing result of lubricating oil.Oil-recovery tank 6 could be arranged to along the direction bottom level from oil and gas import 3 to oil return opening 4 gradually
The structure of reduction, so that lubricating oil is more easily converged along oil-recovery tank 6 towards oil return opening 4.
Preferably, the bottom of spiral stream guidance structure 2 is provided with oil-recovery tank 6, and the sectional area d1 of oil-recovery tank 6 meets 4mm2≤d1
≤50mm2.Oil-recovery tank 6 is set on spiral stream guidance structure 2, and the processing capacity not only needed is smaller, and does not interfere with oil cylinder
The structural strength of body 1, can be effectively ensured the flow efficiency of lubricating oil.Certainly, oil-recovery tank 6 can also be arranged on oil cylinder 1
Inwall on, or be arranged on the inwall of oil cylinder 1 and the bottom of spiral stream guidance structure 2 simultaneously.
In the present embodiment, spiral stream guidance structure 2 includes the spiral deflector 7 that polylith is sequentially connected, polylith spiral stream guidance
It is fixedly connected between plate 7 by pull bar 8.The structure of spiral deflector 7 is easy to process, and cost is relatively low, processing mode variation, more
Plus it is easy to shaping, and can effectively ensure spiral stream guidance effect.Spiral deflector 7 can be integrally machined shaping, can also
Polylith spiral deflector 7 is processed respectively, is afterwards fixed together polylith spiral deflector 7 by modes such as welding.
Pull bar 8 can play a part of strengthening the bonding strength between spiral deflector 7, ensure that the structure of spiral stream guidance structure 2
It is firm, it is ensured that the service life of spiral stream guidance structure 2.The quantity of pull bar 8 can be for one, two, three, four or more
Root according to the length of oil cylinder 1, it is necessary to determine, the length of oil cylinder 1 is longer, and the length of spiral deflector 7 is longer, institute
The quantity of the pull bar 8 needed is also more, and spiral deflector 7 can be effectively ensured with this is not susceptible to deformation in use,
Ensure the spiral stream guidance effect of spiral deflector 7.Spiral deflector 7 should be welded first with pull bar 8, then be installed into oil cylinder
1, the outermost end of spiral deflector 7 need to be with the full weld of oil cylinder 1.
Filter screen 9 is additionally provided with oil cylinder 1, oil return opening 4 is arranged on filter screen 9 close to the side of spiral stream guidance structure 2, oil
Sub-export 5 is arranged on side of the filter screen 9 away from spiral stream guidance structure 2.Filter screen 9 is cylindrical morphology, separation energy according to demand
Power, can fill different materials, the high permeable material such as filler wires, then pressure drop is small, long lifespan, also can filling cotton, activated carbon etc.
Low permeable material, then pressure drop is big, short life, it is assumed that the cylinder thickness of filter screen 9 is e1, it is preferable that e1 meet 40cm≤e1≤
100cm；According to assembly technology, after spiral stream guidance component is installed, filter screen 9, which needs to fix by reinforcement, is welded to cylinder.
The effect of filter screen herein is essentially consisted in, and the gaseous coolant for flowing through filter screen is filtered, entrained profit in the gaseous coolant for being
Lubricating oil is filtered, and the lubricating oil then filtered is stayed on filter screen 9, and flows to along filter screen 9 bottom of oil cylinder 1.
Oil baffle 10 is additionally provided with oil cylinder 1, oil baffle 10 is arranged on one of filter screen 9 away from spiral stream guidance structure 2
Side, oil baffle 10 and axial direction of the filter screen 9 along oil cylinder 1 are smaller than or equal to 10cm, it is preferable that oil baffle 10 with
Filter screen 9 fits.The lubricating oil that oil baffle can be pointed to the lower section of oil outlet 5 is isolated, and prevents gaseous coolant from oil
With the lubricating oil formation reentrainment back-mixing positioned at bottom when outlet 5 is flowed out, oil gas separation is improved.
With reference to shown in referring to Fig. 8 and Fig. 9, according to the second embodiment of the present invention, its structure with first embodiment is basic
Identical, difference is, in the present embodiment, and two spiral stream guidance structures 2 are provided with oil cylinder 1, and two spirals are led
The hand of spiral of flow structure 2 is on the contrary, oil and gas import 3 is located between two spiral stream guidance structures 2, and two oil return openings 4 are located at respectively
The unscrewing end of two spiral stream guidance structures 2.Using double helix flow-guiding structure and double outlet structure, it can effectively prevent from tilting and accumulate
Oil, improves oil return effect, improves lubricating oil utilization rate.
Relative to single outlet pattern, double export models can increase the stability of oil gas mixture flowing.Double export models
Symmetrical and asymmetric two kinds of situations are also divided into, asymmetric situation is the inconsistent situation of left-and-right spiral deflector length.
With reference to shown in referring to Figure 10 and Figure 11, embodiments in accordance with the present invention, condenser includes housing 11 and is arranged on shell
Oil eliminator in body 11, oil eliminator is to be provided with condenser inlet 12 on above-mentioned oil eliminator, housing 11, and condenser enters
Mouth 12 is correspondingly arranged with oil and gas import 3.In the present embodiment, condenser is using built-in oil eliminator, and structure distribution is more reasonable,
The inertial separation of oil gas can be carried out using the spiral stream guidance structure of oil eliminator, reduction oil eliminator is to condenser internal flow
Influence, improve the heat transfer effect of condenser, and with stronger oil return ability.
Axially spaced in housing 11 to be provided with multiple supporting plates 13, oil eliminator is arranged in supporting plate 13.Supporting plate
Multiple mounting holes are provided with 13, heat exchanger tube is located in mounting hole, and installation fixation is carried out by supporting plate 13.Support herein
Plate 13 not only has the effect of support oil eliminator, it may have installs and supports the effect of heat exchanger tube, can save condenser
Inner space, reduces the overall volume of condenser, while improving installation fixed effect of the oil eliminator in condenser.
The length of oil cylinder 1 is a1, and the length of housing 11 meets 0.3a2≤a1≤0.7a2 for a2, a1 and a2.Work as oil
The length relation between cylinder 1 and housing 11 is divided to meet after above-mentioned requirements, oil eliminator, which can be effectively ensured, has enough points
From length, oil gas mixture can thoroughly be separated, improve oil gas separation, but also oil cylinder can be avoided
1 length is long and causes to take condenser inner space excessive, the condensation effect of influence condenser.
Preferably, a diameter of b1 of oil cylinder 1, a diameter of b2, b1 and b2 of housing 11 meet 0.1b2≤b1≤
0.7b2.After the diameter Relationship between oil cylinder 1 and housing 11 meets above-mentioned requirements, oil eliminator tool can be effectively ensured
There are enough separated spaces, oil gas mixture can thoroughly be separated, improve oil gas separation, but also can keep away
The diameter for exempting from oil cylinder 1 is excessive and causes to take condenser inner space excessive, influences the condensation effect of condenser.
The spiral number of spiral deflector 7 need to determine that cylinder is longer by oil barrel lenght, and spiral number is more, excellent
3 are selected, pitch c1 is determined by oil flow, flow is bigger, and pitch is longer, condenser inlet 12 a diameter of c2,0.5c2≤c1
≤2c2。
Embodiments in accordance with the present invention, air conditioner includes oil eliminator, and the oil eliminator is above-mentioned oil eliminator.
Certainly, above is the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art
For, on the premise of its general principles are not departed from, some improvements and modifications can also be made, these improvements and modifications
It is considered as protection scope of the present invention.
Claims (14)
1. a kind of oil eliminator, it is characterised in that including oil cylinder (1) and be arranged in the oil cylinder (1) and along institute
State and be provided with oil on the spiral stream guidance structure (2) of the axial screw extension of oil cylinder (1), the side wall of the oil cylinder (1)
Gas import (3), oil return opening (4) and oil outlet (5), the oil and gas import (3) are located at the screw-in of the spiral stream guidance structure (2)
End, the oil return opening (4) and oil outlet (5) are located at the unscrewing end of the spiral stream guidance structure (2).
2. oil eliminator according to claim 1, it is characterised in that the oil return opening (4) is located at the oil cylinder (1)
Bottom, oil outlet (5) is located at the top of the oil cylinder (1).
3. oil eliminator according to claim 1, it is characterised in that the oil cylinder (1) and the spiral stream guidance knot
The oil-recovery tank (6) for being connected to the oil return opening (4) is formed between the bottom of structure (2).
4. oil eliminator according to claim 3, it is characterised in that the bottom of the spiral stream guidance structure (2) is provided with
Oil-recovery tank (6), the sectional area d1 of the oil-recovery tank (6) meets 4mm2≤d1≤50mm2。
5. oil eliminator according to claim 1, it is characterised in that the spiral stream guidance structure (2) includes polylith successively
It is fixedly connected between the spiral deflector (7) of connection, spiral deflector (7) described in polylith by pull bar (8).
6. oil eliminator according to claim 1, it is characterised in that be additionally provided with filter screen in the oil cylinder (1)
(9), the oil return opening (4) is arranged on the filter screen (9) close to the side of the spiral stream guidance structure (2), the oil outlet
(5) it is arranged on side of the filter screen (9) away from the spiral stream guidance structure (2).
7. oil eliminator according to claim 6, it is characterised in that be additionally provided with oil baffle in the oil cylinder (1)
(10), the oil baffle (10) is arranged on side of the filter screen (9) away from the spiral stream guidance structure (2), the oil baffle
(10) it is smaller than or equal to 10cm with axial direction of the filter screen (9) along the oil cylinder (1).
8. oil eliminator according to claim 1, it is characterised in that be provided with the oil cylinder (1) described in two
Spiral stream guidance structure (2), the hand of spiral of two spiral stream guidance structures (2) is on the contrary, the oil and gas import (3) is positioned at described
Between two spiral stream guidance structures (2), two oil return openings (4) are located at the rotation of two spiral stream guidance structures (2) respectively
Go out end.
9. a kind of condenser, it is characterised in that described including housing (11) and the oil eliminator being arranged in the housing (11)
Oil eliminator is to be provided with condenser inlet on the oil eliminator any one of claim 1 to 8, the housing (11)
(12), the condenser inlet (12) is correspondingly arranged with the oil and gas import (3).
10. condenser according to claim 9, it is characterised in that in the housing (11) it is axially spaced be provided with it is many
Individual supporting plate (13), the oil eliminator is arranged in the supporting plate (13).
11. condenser according to claim 9, it is characterised in that the length of the oil cylinder (1) is a1, the shell
The length of body (11) is that a2, a1 and a2 meet 0.3a2≤a1≤0.7a2.
12. condenser according to claim 9, it is characterised in that a diameter of b1 of the oil cylinder (1), the shell
The a diameter of b2, b1 and b2 of body (11) meet 0.1b2≤b1≤0.7b2.
13. condenser according to claim 9, it is characterised in that the pitch of the spiral stream guidance structure (2) is c1, institute
The a diameter of c2, c1 and c2 for stating condenser inlet (12) meet 0.5c2≤c1≤2c2.
14. a kind of air conditioner, including oil eliminator, it is characterised in that the oil eliminator is any one of claim 1 to 8
Described oil eliminator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710266263.0A CN107036345A (en) | 2017-04-21 | 2017-04-21 | Oil eliminator, condenser and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710266263.0A CN107036345A (en) | 2017-04-21 | 2017-04-21 | Oil eliminator, condenser and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107036345A true CN107036345A (en) | 2017-08-11 |
Family
ID=59536165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710266263.0A Pending CN107036345A (en) | 2017-04-21 | 2017-04-21 | Oil eliminator, condenser and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107036345A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940835A (en) * | 2017-12-21 | 2018-04-20 | 珠海格力电器股份有限公司 | Condenser oil separating device, condenser and refrigerating plant |
| CN107940836A (en) * | 2017-12-21 | 2018-04-20 | 珠海格力电器股份有限公司 | Condenser assemble method, oil separation component, condenser and refrigerating plant |
| CN109404253A (en) * | 2018-09-30 | 2019-03-01 | 芜湖福马汽车零部件有限公司 | A kind of air compressor machine |
| CN109555701A (en) * | 2018-12-25 | 2019-04-02 | 青岛海尔空调电子有限公司 | Gas and oil separating plant and air-conditioning system comprising the gas and oil separating plant |
| CN111473554A (en) * | 2020-01-15 | 2020-07-31 | 浙江青风环境股份有限公司 | High-temperature heat pump oil gas treatment device |
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| CN109404253A (en) * | 2018-09-30 | 2019-03-01 | 芜湖福马汽车零部件有限公司 | A kind of air compressor machine |
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