CN113405285A - Double-layer-structure noise reduction liquid storage device and compressor - Google Patents
Double-layer-structure noise reduction liquid storage device and compressor Download PDFInfo
- Publication number
- CN113405285A CN113405285A CN202010181561.1A CN202010181561A CN113405285A CN 113405285 A CN113405285 A CN 113405285A CN 202010181561 A CN202010181561 A CN 202010181561A CN 113405285 A CN113405285 A CN 113405285A
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- Prior art keywords
- cavity
- inlet pipe
- air inlet
- noise reduction
- gap
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- 239000007788 liquid Substances 0.000 title claims abstract description 31
- 238000001914 filtration Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- 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
- F25B43/006—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/06—Silencing
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- 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
- F25B31/00—Compressor arrangements
Abstract
The invention provides a noise reduction liquid storage device with a double-layer structure and a compressor, which comprise a first cavity, a second cavity, an air inlet pipe and an air outlet pipe, wherein the first cavity is arranged in the second cavity, a gap is arranged between the first cavity and the second cavity, a through hole is arranged on the side wall of one end, connected with the air inlet pipe, of the first cavity, the first cavity is communicated with the gap through the through hole, one end of the air inlet pipe penetrates through the second cavity, the first cavity and is arranged in the first cavity, the other end of the air inlet pipe is arranged outside the second cavity, the air outlet pipe is arranged on the second cavity, the air outlet pipe is communicated with the gap, and the air inlet pipe, the first cavity, the gap and the air outlet pipe are communicated. The invention cancels the internal vertical tube, increases the sound insulation quantity and realizes the purpose of noise reduction.
Description
Technical Field
The invention relates to the field of compressors, in particular to a noise reduction liquid storage device with a double-layer structure and a compressor.
Background
The rotary compressor is a new type of compressor, and its motor does not need to convert the rotary motion of rotor into reciprocating motion of piston, but directly drives the rotary piston to make rotary motion to complete the compression of refrigerant vapor. The air compressor is more suitable for small air conditioners, and particularly has wider application on household air conditioners. For example, rotary air compressors manufactured by U.S. general electric and vopp have been designed with better anti-overheating and lubrication devices. It adopts the cooling mode of leading part of refrigerant liquid in condenser to compression chamber by using pipe to make it be injected in cylinder, so that its cooling effect can be raised.
The rotary compressor has the main advantages that: because the piston does the rotary motion, the compression work is smooth and stable and balanced. In addition, the rotary air compressor has no clearance volume and no interference of re-expansion gas, so that the rotary air compressor has the advantages of high compression efficiency, few parts, small volume, light weight, good balance performance, complete protection measures, low power consumption and the like.
The noise problem is also a concern to users when the rotary compressor is applied to a home air conditioner. The accumulator is an important component of the rotary compressor and is also one of the primary sound sources. Existing reservoir noise is mainly concentrated within 2000Hz, with a prominence near 1000Hz, mainly affected by the bottom mode. While the bottom mode is primarily affected by the bottom mounting stiffness. The mounting rigidity is improved, the mode below 2000Hz can be improved, and the purpose of reducing noise can be realized. How to improve the bottom installation rigidity becomes the direction of research of various manufacturers.
As shown in fig. 1, a standpipe is provided inside the reservoir of the prior art, and the vibration frequency of the standpipe greatly contributes to low-frequency noise and is not easily welded.
Therefore, those skilled in the art have made an effort to develop a compressor having high efficiency and a simple structure, which can effectively reduce noise.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a noise reduction liquid storage device and a compressor with a double-layer structure, wherein an internal vertical pipe is omitted, and meanwhile, the double-layer structure also increases the sound insulation quantity, so that the noise reduction purpose is realized.
According to one aspect of the invention, a noise reduction liquid storage device with a double-layer structure is provided, and comprises a first cavity, a second cavity, an air inlet pipe and an air outlet pipe, wherein the first cavity is arranged in the second cavity, a gap is arranged between the first cavity and the second cavity, a through hole is arranged on the side wall of one end, connected with the air inlet pipe, of the first cavity, the interior of the first cavity is communicated with the gap through the through hole, one end of the air inlet pipe sequentially penetrates through the second cavity and the first cavity to be arranged in the first cavity, the other end of the air inlet pipe is arranged outside the second cavity, the air outlet pipe is arranged on the second cavity, the air outlet pipe is communicated with the gap, and the air inlet pipe, the first cavity, the gap and the air outlet pipe are communicated.
Preferably: the air inlet pipe is arranged at the top of the first cavity and the top of the second cavity.
Preferably: the top of the first cavity is connected with the top of the second cavity.
Preferably: the space comprises a side wall space formed between the side wall of the first cavity and the side wall of the second cavity and a bottom space formed between the bottom of the first cavity and the bottom of the second cavity, the air outlet pipe is arranged at the bottom of the second cavity and communicated with the bottom space
Preferably: the height of the pipe orifice at one end of the air inlet pipe is lower than that of the through hole.
Preferably: and a filtering device is also arranged between one end of the air inlet pipe and the through hole on the side wall of the end, connected with the air inlet pipe, of the first cavity.
Preferably: the filter device is a spherical filter screen arranged at the outlet of one end of the air inlet pipe.
Preferably: the filter device is arranged on the inner wall of the first cavity, the through hole is formed in the top of the air inlet pipe and between the filter devices, and the filter devices are filter screens.
Preferably: and an oil return hole is formed in the bottom of the first cavity.
According to another aspect of the invention, a compressor is provided, which comprises the noise reduction liquid storage device with the double-layer structure.
According to the noise reduction liquid storage device and the compressor with the double-layer structure, the middle main body is used for storing liquid, oil return is realized through the small holes at the bottom, the vertical pipe in the compressor is omitted, meanwhile, the sound insulation quantity is increased through the double-layer structure, and the purpose of noise reduction is achieved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
FIG. 1 is a schematic view of a compressor according to the prior art;
fig. 2 is a schematic structural view of a noise reduction liquid reservoir having a double-layer structure according to embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a noise reduction liquid reservoir having a double-layer structure according to embodiment 2 of the present invention.
Reference numerals
1 first chamber
2 second Chamber
3 air inlet pipe
31 one end of the intake pipe
32 another end of the air inlet pipe
4 air outlet pipe
5 voids of
6 through hole
7 oil return hole
8 Filter device
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
As shown in fig. 2, in an embodiment of the present invention, a noise reduction accumulator and a compressor, preferably a rotary compressor, having a double-layer structure are provided.
The compressor comprises a first cavity 1, a second cavity 2, an air inlet pipe 3 and an air outlet pipe 4.
The first cavity 1 is arranged in the second cavity 2.
A gap 5 is arranged between the first cavity 1 and the second cavity 2.
The side wall of the first cavity 1 connected with one end of the air inlet pipe 3 is provided with a through hole 6, wherein the top is the upper part in the vertical direction as shown in the figure, and is also the upper part in the vertical direction when the liquid storage device works.
The interior of the first chamber 1 is connected to the gap 5 via the through-hole 6, i.e. gas can flow from the interior of the first chamber 1 into the gap 5 via the through-hole 6.
One end 31 of the air inlet pipe 3 penetrates through the second cavity 2 and the first cavity 1 and is positioned in the first cavity 1, the other end 32 of the air inlet pipe 3 is arranged outside the second cavity 2, namely, the outside of the second cavity 2 is communicated with the inside of the first cavity 1 through the air inlet pipe 3, and the air outside the second cavity 2 can enter the first cavity 1 through the air inlet pipe 3. And preferably the inlet pipe 3 is provided at the top of the first and second chambers 1 and 2.
The air outlet pipe 4 is arranged on the second cavity 2. One end of the air outlet pipe 4 is communicated with the gap 5, and the other end of the air outlet pipe 4 is communicated with the outside of the second cavity 2, namely, the gas in the gap 5 can flow into the air outlet pipe 4 and flow out of the second cavity 2.
The air inlet pipe 3, the first cavity 1, the gap 5 and the air outlet pipe 4 are communicated, namely, air can enter through the air inlet pipe 3 and then sequentially pass through the first cavity 1 and the gap 5 and flow out through the air outlet pipe 4.
And as shown in fig. 3 in combination, in the embodiment of the present invention, it is preferable that a filtering device 8 is further provided between one end 31 of the air inlet pipe 3 and the through hole 6 on the side wall of the end of the first chamber 1 connected to the air inlet pipe 3. Between the one end 31 of intake pipe 3 and the through-hole 6 on the lateral wall of the one end that first cavity 1 is connected with intake pipe 3, according to the flow of air current promptly, behind the one end 31 of air current outflow intake pipe 3, before getting into through-hole 6 on the lateral wall of the one end that first cavity 1 is connected with intake pipe 3, need pass through filter equipment 8, filter equipment 8 locates between the one end 31 of intake pipe 3 and through-hole 6. The filter device 8 can filter the gas flowing into the reservoir and facilitate gas-liquid separation.
As shown in fig. 2, the filtering device 8 is preferably provided at the outlet of the one end 31 of the inlet pipe 3, and is a spherical filter, but may be a filter having another shape such as an oblate or the like, which facilitates the filtration of the gas flowing into the inlet pipe 3.
As shown in fig. 3, preferably, the filtering device 8 is disposed in the first cavity 1 and located at the through hole 6 on the side wall of the end of the first cavity 1 connected to the gas inlet pipe 3, so as to facilitate gas filtration after gas-liquid separation.
According to the noise reduction liquid storage device and the compressor with the double-layer structure, gas enters the inner layer from the top gas inlet pipe, liquid is separated and sinks to the bottom, and gas enters the gap between the inner layer and the outer layer from the through hole communicated with the upper portion. Enters the compressor cylinder body through the bottom air suction port. According to the embodiment of the invention, an internal vertical pipe is omitted, and meanwhile, the sound insulation quantity is increased due to the double-layer structure, so that the purpose of noise reduction is achieved.
As shown in fig. 2 and 3, in the embodiment of the present invention, it is preferable that the first and second cavities 1 and 2 have a cylindrical shape, and the diameter of the first cavity 1 is smaller than that of the second cavity 2.
And preferably the top of the first chamber 1 is shared with the top portion of the second chamber 2.
As shown in fig. 2 and 3, in the embodiment of the present invention, it is preferable that the height of the orifice of one end 31 of the gas inlet pipe 3 is lower than the height of the through hole 6 on the sidewall of the first cavity 1, that is, the top gas inlet pipe is inserted into the inner layer of the reservoir for a certain distance, so as to facilitate gas-liquid separation.
Furthermore, as shown in fig. 2 and fig. 3, in the embodiment of the present invention, it is preferable that the bottom of the first cavity 1 is provided with an oil return hole 7, and it is preferable that the oil return hole 7 is located above a port of the end of the air outlet pipe 4 close to the first cavity 2, preferably directly above in the vertical direction, so as to facilitate oil return through a small hole at the bottom.
The invention is described below in specific examples:
example 1
As shown in fig. 2, the noise reduction liquid storage device with the double-layer structure for the compressor comprises a first cavity 1, a second cavity 2, an air inlet pipe 3 and an air outlet pipe 4.
The first cavity 1 and the second cavity 2 are both cylindrical in shape, and the diameter of the first cavity 1 is smaller than that of the second cavity 2. The top of the first chamber 1 is shared with the top portion of the second chamber 2.
The first cavity 1 is arranged in the second cavity 2.
A gap 5 is arranged between the first cavity 1 and the second cavity 2.
A through hole 6 is arranged on the side wall of one end of the first cavity 1 connected with the air inlet pipe 3.
The first cavity 1 is communicated with the gap 5 through a through hole 6.
The intake pipe 3 is arranged at the top of the first cavity 1 and the second cavity 2, one end 31 of the intake pipe 3 penetrates through the second cavity 2 and the first cavity 1 and is located in the first cavity 1, and the other end 32 of the intake pipe 3 is arranged outside the second cavity 2. The height of the nozzle of one end 31 of the air inlet pipe 3 is lower than that of the through hole 6 on the side wall of the first cavity 1.
The outlet of one end 31 of the air inlet pipe 3 is provided with a filtering device 8 which is a spherical filter screen.
The air outlet pipe 4 is arranged on the second cavity 2. One end of the air outlet pipe 4 is communicated with the gap 5, and the other end of the air outlet pipe 4 is communicated with the outside of the second cavity 2.
The air inlet pipe 3, the first cavity 1, the gap 5 and the air outlet pipe 4 are communicated, namely, air can enter through the air inlet pipe 3 and then sequentially pass through the spherical filter screen, the first cavity 1 and the gap 5 and flow out through the air outlet pipe 4.
The bottom of the first cavity 1 is provided with an oil return hole 7, and the position of the oil return hole 7 is right above the port of one end of the air outlet pipe 4 close to the second cavity 2.
Example 2
As shown in fig. 3, the noise reduction liquid storage device with the double-layer structure for the compressor comprises a first cavity 1, a second cavity 2, an air inlet pipe 3 and an air outlet pipe 4.
The first cavity 1 and the second cavity 2 are both cylindrical in shape, and the diameter of the first cavity 1 is smaller than that of the second cavity 2. The top of the first chamber 1 is shared with the top portion of the second chamber 2.
The first cavity 1 is arranged in the second cavity 2.
A gap 5 is arranged between the first cavity 1 and the second cavity 2.
Be equipped with through-hole 6 on the lateral wall of the one end that first cavity 1 and intake pipe 3 are connected, be equipped with filter equipment 8 on the inner wall of first cavity, through-hole 6 is located between the top of filter equipment 8 and first cavity 1, and filter equipment 8 is the filter screen.
The interior of the first cavity 1 is communicated with the gap 5 through a through hole 6.
The intake pipe 3 is arranged at the top of the first cavity 1 and the second cavity 2, one end 31 of the intake pipe 3 sequentially penetrates through the second cavity 2 and the first cavity 1 and is located in the first cavity 1, and the other end 32 of the intake pipe 3 is arranged outside the second cavity 2. The height of the nozzle of one end 31 of the air inlet pipe 3 is lower than that of the through hole 6 on the side wall of the first cavity 1.
The air outlet pipe 4 is arranged on the second cavity 2. One end of the air outlet pipe 4 is communicated with the gap 5, and the other end of the air outlet pipe 4 is communicated with the outside of the second cavity 2.
The air inlet pipe 3, the first cavity 1, the gap 5 and the air outlet pipe 4 are communicated, namely, air can enter through the air inlet pipe 3 and then sequentially pass through the first cavity 1, the filtering device 8 and the gap 5, and then flows out through the air outlet pipe 4.
The bottom of the first cavity 1 is provided with an oil return hole 7, and the position of the oil return hole 7 is right above the port of one end of the air outlet pipe 4 close to the second cavity 2.
In summary, according to the noise reduction liquid storage device and the compressor with the double-layer structure, gas enters the inner layer from the top gas inlet pipe, liquid is separated and sinks to the bottom, and gas enters the gap between the inner layer and the outer layer from the through hole communicated with the upper portion and enters the compressor cylinder body through the bottom gas suction port. According to the embodiment of the invention, an internal vertical pipe is omitted, and meanwhile, the sound insulation quantity is increased due to the double-layer structure, so that the purpose of noise reduction is achieved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The noise-reduction liquid storage device with the double-layer structure is characterized by comprising a first cavity (1), a second cavity (2), an air inlet pipe (3) and an air outlet pipe (4), wherein the first cavity (1) is arranged in the second cavity (2), a gap (5) is formed between the first cavity (1) and the second cavity (2), a through hole (6) is formed in the side wall of one end, connected with the air inlet pipe (3), of the first cavity (1), the inside of the first cavity (1) is communicated with the gap (5) through the through hole (6), one end (31) of the air inlet pipe (3) penetrates through the second cavity (2) and the first cavity (1) and is arranged in the first cavity (1), the other end (32) of the air inlet pipe (3) is arranged outside the second cavity (2), and the air outlet pipe (4) is arranged on the second cavity (2), the air outlet pipe (4) is communicated with the gap (5), and the air inlet pipe (3), the first cavity (1), the gap (5) and the air outlet pipe (4) are communicated.
2. The two-layer noise reduction liquid reservoir of claim 1, wherein: the air inlet pipe (3) is arranged at the top of the first cavity (1) and the top of the second cavity (2).
3. The two-layer noise reduction liquid reservoir of claim 1, wherein: the top of the first cavity (1) is connected with the top of the second cavity (2).
4. The two-layer noise reduction liquid reservoir of claim 3, wherein: the gap (5) comprises a side wall gap formed between the side wall of the first cavity (1) and the side wall of the second cavity (2) and a bottom gap formed between the bottom of the first cavity (1) and the bottom of the second cavity (2), and the air outlet pipe (4) is arranged at the bottom of the second cavity (2) and communicated with the bottom gap.
5. The two-layer noise reduction liquid reservoir of claim 1, wherein: the height of the pipe orifice of one end (31) of the air inlet pipe (3) is lower than that of the through hole (6).
6. The two-layer noise reduction liquid reservoir of claim 1, wherein: and a filtering device (8) is further arranged between one end (31) of the air inlet pipe (3) and the through hole (6) on the side wall of the end, connected with the air inlet pipe (3), of the first cavity (1).
7. The two-layer noise reduction liquid reservoir of claim 6, wherein: the filtering device (8) is a spherical filter screen arranged at the outlet of one end (31) of the air inlet pipe (3).
8. The two-layer noise reduction liquid reservoir of claim 6, wherein: filter equipment (8) are located on the inner wall of first cavity (1), through-hole (6) are located the top of intake pipe (3) with between filter equipment (8), filter equipment (8) are a filter screen.
9. The two-layer noise reduction liquid reservoir of claim 1, wherein: and an oil return hole (7) is formed in the bottom of the first cavity (1).
10. A compressor, characterized by: a noise reduction reservoir comprising a double-layer structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010181561.1A CN113405285A (en) | 2020-03-16 | 2020-03-16 | Double-layer-structure noise reduction liquid storage device and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010181561.1A CN113405285A (en) | 2020-03-16 | 2020-03-16 | Double-layer-structure noise reduction liquid storage device and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113405285A true CN113405285A (en) | 2021-09-17 |
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ID=77676251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010181561.1A Pending CN113405285A (en) | 2020-03-16 | 2020-03-16 | Double-layer-structure noise reduction liquid storage device and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113405285A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777362A (en) * | 2022-03-30 | 2022-07-22 | 珠海格力电器股份有限公司 | Knockout, compressor and air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203615661U (en) * | 2013-12-03 | 2014-05-28 | 广东美芝精密制造有限公司 | Liquid accumulator and compressor with liquid accumulator |
| JP2017125466A (en) * | 2016-01-15 | 2017-07-20 | ダイキン工業株式会社 | Accumulator, and compressor including the same |
| WO2018135385A1 (en) * | 2017-01-20 | 2018-07-26 | サンデンホールディングス株式会社 | Accumulator with internal heat exchanger, and refrigeration cycle device equipped with same |
| CN207963250U (en) * | 2018-03-13 | 2018-10-12 | 广东美芝制冷设备有限公司 | The liquid storage device and compressor of compressor |
| CN209147523U (en) * | 2018-11-12 | 2019-07-23 | 青岛海尔空调器有限总公司 | A kind of liquid storage device for compressor |
-
2020
- 2020-03-16 CN CN202010181561.1A patent/CN113405285A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203615661U (en) * | 2013-12-03 | 2014-05-28 | 广东美芝精密制造有限公司 | Liquid accumulator and compressor with liquid accumulator |
| JP2017125466A (en) * | 2016-01-15 | 2017-07-20 | ダイキン工業株式会社 | Accumulator, and compressor including the same |
| WO2018135385A1 (en) * | 2017-01-20 | 2018-07-26 | サンデンホールディングス株式会社 | Accumulator with internal heat exchanger, and refrigeration cycle device equipped with same |
| CN207963250U (en) * | 2018-03-13 | 2018-10-12 | 广东美芝制冷设备有限公司 | The liquid storage device and compressor of compressor |
| CN209147523U (en) * | 2018-11-12 | 2019-07-23 | 青岛海尔空调器有限总公司 | A kind of liquid storage device for compressor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777362A (en) * | 2022-03-30 | 2022-07-22 | 珠海格力电器股份有限公司 | Knockout, compressor and air conditioner |
| CN114777362B (en) * | 2022-03-30 | 2023-12-22 | 珠海格力电器股份有限公司 | Knockout, compressor and air conditioner |
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Application publication date: 20210917 |
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