CN107314579B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN107314579B CN107314579B CN201710488498.4A CN201710488498A CN107314579B CN 107314579 B CN107314579 B CN 107314579B CN 201710488498 A CN201710488498 A CN 201710488498A CN 107314579 B CN107314579 B CN 107314579B
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- pipeline
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- barrel
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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
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Mechanical Engineering (AREA)
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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- Power Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a gas-liquid separator, an air conditioner and a control method of the air conditioner, wherein the gas-liquid separator comprises a closed barrel, an air inlet pipeline and an outlet pipeline which are connected with the barrel, the outlet pipeline comprises an inner pipeline arranged in the barrel and an outer pipeline extending out of the barrel, a plurality of liquid return pipelines are connected between the outer pipeline and the bottom of the barrel, and different liquid return pipelines extend into the barrel at different heights; the air conditioner comprises the gas-liquid separator; the control method of the air conditioner is used for controlling the air conditioner. According to the invention, the plurality of liquid return pipelines are arranged, the liquid return pipelines are far larger than the existing oil return holes, and the oil return quantity is far larger than the oil return holes, so that the blocking probability of the oil return pipelines is reduced.
Description
Technical Field
The invention belongs to the field of air conditioners, and particularly relates to an air conditioner.
Background
In the production process of air conditioners, compressors are an important component. The lubrication of the compressor is the most important link for ensuring the normal operation of the system and reducing the damage of the compressor. During the working process of the compressor, the oil is filtered by the filter screen under the action of pressure difference, transported by the pipeline and finally returned to the compressor. The gas-liquid separator is used as a main system component of an outdoor unit of an air conditioner, is usually arranged at the air inlet front end of a compressor and plays roles of returning oil, separating gaseous and liquid refrigerants and storing the refrigerants, and the structural design of the gas-liquid separator directly influences the service life of the compressor and the reliability of system operation.
The chinese invention patent CN 203489553U discloses a porous gas-liquid separator, which comprises a sealed cylinder, an air inlet pipe and at least one air outlet pipe, wherein the bottom of the air outlet pipe is provided with a first oil return hole, and the air outlet end of the air outlet pipe is provided with a first refrigerant return hole. The central axis of the outlet of the air inlet pipe is vertical to the central axis of the inlet of the exhaust pipe. The inlet end of the discharge tube is also perforated with a second refrigerant return hole and a third refrigerant return hole.
Although the invention patent adopts a porous oil return mode, the invention patent can also be applied to a large-scale parallel system, but the invention patent has the following defects: (1) after the machine is stopped, liquid is accumulated in the outlet pipeline, and liquid return is caused when the machine is started; (2) after the specific size is determined, the liquid return quantity of the gas component passing through the bottom oil return hole is not adjustable; (3) the size of the oil return hole is generally 1-3 mm, and the oil return hole is small and easy to block.
Disclosure of Invention
In order to solve the problems, the invention provides the gas-liquid separator and the air conditioner, and the invention reduces the possibility of blockage of the oil return loop because the pipe orifice of the oil return pipeline is far larger than the existing oil return hole and the oil return quantity is far larger than the oil return hole by arranging a plurality of oil return pipelines.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a vapour and liquid separator, includes the closed barrel, and connect in the air inlet pipeline and the export pipeline of barrel, the export pipeline including set up in the inside pipeline of barrel, and stretch out the outside pipeline of barrel, outside pipeline with be connected with a plurality of return liquid pipelines between the bottom of barrel, different return liquid pipeline stretch into to the inside difference in height of barrel.
As a further optimization of the invention, different liquid return pipelines are provided with electric control valves which can control whether the liquid return pipelines circulate or not.
As a further optimization of the present invention, the electric control valve is a solenoid valve or an electronic expansion valve.
As a further optimization of the invention, a filter is arranged at the pipe orifice of the liquid return pipeline extending into the cylinder body.
As a further optimization of the present invention, the number of the liquid return pipelines is two, and the two liquid return pipelines are respectively a first liquid return pipeline and a second liquid return pipeline, the first liquid return pipeline is provided with a first electronic control valve, the second liquid return pipeline is provided with a second electronic control valve, and the first liquid return pipeline and the second liquid return pipeline extend into the cylinder at different heights.
An air conditioner, characterized in that: comprising the gas-liquid separator.
As a further optimization of the invention, the invention further comprises an indoor unit heat exchanger, an outdoor unit heat exchanger, a compressor, a controller and a detector, wherein the air inlet pipeline of the gas-liquid separator is connected with the indoor unit heat exchanger, the outlet pipeline is connected with an inlet of the compressor, the outdoor unit heat exchanger is respectively connected with outlets of the indoor unit heat exchanger and the compressor, and the electric control valves on the liquid return pipelines are all electrically connected with the controller; the controller is electrically connected with the detector and controls the opening and closing of each path of electric control valve on the liquid return pipeline according to a detection signal fed back by the detector.
As a further optimization of the present invention, an expansion valve is disposed on a connection pipeline between the indoor heat exchanger and the outdoor heat exchanger, and the expansion valve is connected to the detector.
When a detection signal detected by a detector is greater than a first preset value, a controller controls a first electric control valve and a second electric control valve to be opened; when the detection signal detected by the detector is smaller than a second preset value, the controller controls the first electric control valve at the higher position in the cylinder body to be closed and opens the second electric control valve at the lower position.
As a further optimization of the present invention, the detection signal detected by the detector is a difference between a discharge temperature of the compressor and a saturation temperature corresponding to a discharge pressure, or the detection signal detected by the detector is an opening value of the expansion valve.
Compared with the prior art, the invention has the advantages and positive effects that:
1. according to the gas-liquid separator, the oil return pipelines with different heights are arranged, when liquid storage requirements are different, different requirements can be met by opening different pipelines, and meanwhile, the oil return pipelines are far larger than the oil return holes, so that the blocking probability of an oil return circuit is reduced;
2. according to the gas-liquid separator, the loop pipeline with the height difference is arranged, so that the liquid storage function of the gas-liquid separator is realized, and the gas-liquid separator is suitable for a multi-split parallel system;
3. the air conditioner solves the problem that when a heat pump system operates at low outdoor temperature, the lubricating oil of the compressor with increased viscosity adheres to the surface of the oil return hole, so that the liquid return resistance of the oil return hole is increased, and the abnormal liquid storage in the air separator is caused; the situation that when the heat pump system is abnormal, impurities and water are attached to the surface of the oil return hole in the system, the liquid return resistance passing through the oil return hole is increased, and accordingly abnormal liquid storage is achieved in the gas-liquid separator is improved.
Drawings
FIG. 1 is a schematic view of a gas-liquid separator according to the present invention;
fig. 2 is a system diagram of the air conditioner of the present invention.
In the above figures: 100. a gas-liquid separator; 1. a barrel; 2. an air intake line; 3. an outlet line; 31. a first connecting pipe; 32. a second connecting pipe; 4. a first liquid return pipeline; 41. a first electrically controlled valve; 5. a second return line; 51. a second electrically controlled valve; 200. an indoor unit heat exchanger; 300. an outdoor heat exchanger; 400. a compressor; 500. an expansion valve.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, the structure of the gas-liquid separator of the present invention is schematically shown. As shown in fig. 1, the present invention provides a gas-liquid separator 100, comprising a closed cylinder 1, and a gas inlet pipe 2 and an outlet pipe 3 connected to the cylinder 1, wherein the gas inlet pipe 2 is used for guiding a gaseous or liquid refrigerant to flow into the cylinder 1, and the outlet pipe 3 is used for guiding a gaseous refrigerant to discharge from the cylinder.
With further reference to fig. 1, in the above description, the outlet pipeline 3 includes an internal pipeline disposed inside the cylinder 1 and an external pipeline extending out of the cylinder 1, and a pipe orifice of the internal pipeline is located at an upper portion of the cylinder 1 and is not higher than a pipe orifice of the air inlet pipeline 2 inside the cylinder 1, so as to facilitate the gas to enter the external pipeline from the internal pipeline until the gas is discharged; it should be noted that, in the present invention, there are various ways of extending the internal pipeline out of the cylinder 1, and the present invention is not limited to this, and for example, the internal pipeline may be extended from the top of the cylinder 1, extended from the bottom of the cylinder 1, extended from the side wall of the cylinder 1, and the like, and all of them are within the protection scope of the present invention.
Further, a plurality of liquid return pipelines are connected between the external pipeline and the bottom of the cylinder 1, and different liquid return pipelines extend into the cylinder at different heights, specifically, different liquid return pipelines are at different heights relative to the bottom of the cylinder 1 at the pipe orifice of the cylinder 1. For the height difference formed by the different liquid return pipelines, the volume of the height difference corresponding to the cylinder is the volume of the liquid storage amount, that is, the specific value of the height difference depends on the required liquid storage amount, and therefore, the specific value is not limited herein.
In the above, by arranging the plurality of return pipelines, the area of the pipe orifice of the return pipeline is far larger than that of the existing oil return hole, and the oil return amount of the return pipeline is far larger than that of the oil return hole, so that the blocking probability of the return pipeline is reduced; in addition, the arrangement of a plurality of liquid return pipelines is favorable for properly adjusting the liquid return amount of the liquid return pipelines according to specific requirements. And the height difference between different liquid return pipelines realizes the liquid storage function of the gas-liquid separator, and is suitable for a multi-split parallel system.
Referring further to fig. 1, the liquid return line is provided with an electric control valve that can control whether the liquid return line flows. The electric control valve is preferably a solenoid valve or an electronic expansion valve.
In addition, the liquid return pipeline and the outlet pipeline can be directly communicated or can be connected in a mode of arranging a connecting pipe, namely, the liquid return pipeline and the outlet pipeline are connected through the connecting pipe, one end of the connecting pipe is integrally communicated with the liquid return pipeline, and the other end of the connecting pipe is welded with the liquid return pipeline. The connecting pipes are arranged for connection, so that the installation of an outlet pipeline, a liquid return pipeline and the like is more convenient.
Furthermore, a filter is arranged at the position, extending into the barrel body, of the pipe orifice of the liquid return pipeline so as to block impurities in the mixed oil in the barrel body.
The gas-liquid separator of the present invention is preferably provided with two liquid return pipelines, and the specific description is as follows:
as shown in fig. 1, the number of the liquid return pipelines is two, and the two liquid return pipelines are respectively a first liquid return pipeline 4 and a second liquid return pipeline 5, and the height of the first liquid return pipeline 4 in the cylinder is set to be higher than the height of the second liquid return pipeline 5 in the cylinder 1, a first electric control valve 41 is arranged on the first liquid return pipeline 4, a second electric control valve 51 is arranged on the second liquid return pipeline 5, and the heights of the first liquid return pipeline 4 and the second liquid return pipeline 5 extending into the cylinder are different. Namely, the height difference between the two is a, and the value of the height difference a depends on the required liquid storage amount. Preferably, the first liquid return line 4 and the outlet line are connected by a first connection pipe 31, and the second liquid return line 5 and the outlet line are connected by a second connection pipe 32.
As shown in fig. 2, the present invention further provides an air conditioner, which includes the gas-liquid separator 100 according to any of the above embodiments, and further includes an indoor heat exchanger 200, an outdoor heat exchanger 300, a compressor 400, a controller (not shown), and a detector (not shown), wherein the gas-liquid separator 100 is connected between the compressor 400 and the indoor heat exchanger 200. An expansion valve 500 is disposed on a connection pipeline between the indoor heat exchanger 200 and the outdoor heat exchanger 300, and the expansion valve 500 is connected to the detector. Specifically, the air inlet pipeline 2 in the gas-liquid separator 100 is connected with the indoor heat exchanger 200, the outlet pipeline 3 is connected with the inlet of the compressor 400, the outdoor heat exchanger 300 is respectively connected with the outlets of the indoor heat exchanger 200 and the compressor 400, and the electric control valves on the liquid return pipeline are all electrically connected with the controller so as to control the opening and closing of the electric control valves on the liquid return pipeline; the controller is further electrically connected with the detector and further controls the opening and closing of each path of electric control valve on the liquid return pipeline according to the detection fed back by the detector.
In the above, the detector has two embodiments, in the first embodiment, the detector may detect a difference between an exhaust temperature of the compressor and a saturation temperature corresponding to the exhaust pressure, and the controller compares the difference detected by the detector with a preset value to further control the on/off of the electric control valve; in a second embodiment, the detector can detect the opening degree of the expansion valve, and the controller compares the opening degree with a preset value to further control the opening and closing of the electronic control valve.
By adopting the air conditioner, the problem that the lubricating oil of the compressor with increased viscosity adheres to the surface of the oil return hole when a heat pump system operates at low outdoor temperature, so that the liquid return resistance of the oil return hole is increased, and the liquid is abnormally stored in the cylinder is solved; the situation that when the heat pump system is abnormal, impurities and moisture in the air conditioner are attached to the surface of the oil return hole, the liquid return resistance passing through the oil return hole is increased, and accordingly abnormal liquid storage in the gas-liquid separator is achieved is improved.
The invention also provides a control method of the air conditioner, which uses the air conditioner, and specifically comprises the following steps:
when a detection signal detected by the detector is greater than a first preset value, namely the gas-liquid separator does not need to store liquid at the moment, the first electric control valve and the second electric control valve are both opened;
when a detection signal detected by the detector is smaller than a second preset value, namely the gas-liquid separator needs to store liquid at the moment, the controller controls the first electric control valve at a higher position in the cylinder body to be closed and opens the second electric control valve at a lower position. Thus, a part of liquid refrigerant can be accumulated in the cylinder, and the gas-liquid separator has the functions of both gas separation and a liquid reservoir.
To further illustrate the above control method, the following description will be made by taking two return lines as an example:
in a first embodiment, the detector may detect a difference between a compressor discharge temperature and a saturation temperature corresponding to a discharge pressure, specifically:
when the difference value of the exhaust temperature of the compressor and the saturation temperature corresponding to the exhaust pressure is detected to be greater than a first preset temperature by the detector, namely the gas-liquid separator does not need to store liquid at the moment, and the first electric control valve and the second electric control valve are both opened;
when the difference value of the saturation temperature corresponding to the exhaust temperature and the exhaust pressure of the compressor is smaller than a second preset temperature, namely the gas-liquid separator needs to store liquid at the moment, the controller controls the first electric control valve at the higher position in the cylinder to be closed and opens the second electric control valve at the lower position. Therefore, a part of liquid refrigerant can be accumulated in the cylinder, and the gas-liquid separator has the functions of both gas separation and a liquid reservoir;
when the air conditioner is in any other state, namely normal operation, the liquid refrigerant and the liquid oil at the bottom of the cylinder body return to the outlet pipeline through the first liquid return pipeline and the second liquid return pipeline.
In the above, it should be noted that, the values of the first preset temperature and the second preset temperature are determined according to the operation performance of different air conditioners, but because the operation performance of each air conditioner is a determined value, the first preset temperature and the second preset temperature that are correspondingly selected are also determined values, specifically, the selection criteria of the first preset temperature and the second preset temperature are that when the air conditioner is in a normal operation state, the maximum value and the minimum value of the operation temperature of the air conditioner are the maximum value and the minimum value of the operation temperature, and the first preset temperature is greater than the value of the second preset temperature. For example, when the normal operating temperature of the air conditioner is 20 ℃ to 40 ℃, the first preset temperature is 40 ℃ and the second preset temperature is 20 ℃.
In a second embodiment, the detector may detect an opening degree of the expansion valve, specifically:
when the detector detects that the opening degree of the expansion valve is larger than a first preset opening degree, namely the gas-liquid separator does not need to store liquid at the moment, the first electric control valve and the second electric control valve are both opened;
when the detector detects that the opening degree of the expansion valve is smaller than a second preset opening degree, namely the gas-liquid separator needs to store liquid at the moment, the controller controls the first electric control valve at a higher position in the cylinder to close and opens the second electric control valve at a lower position. Therefore, a part of liquid refrigerant can be accumulated in the cylinder, and the gas-liquid separator has the functions of both gas separation and a liquid reservoir;
when the air conditioner is in any other state, namely normal operation, the liquid refrigerant and the liquid oil at the bottom of the cylinder body return to the outlet pipeline through the first liquid return pipeline and the second liquid return pipeline.
In the above, the values of the first preset opening and the second preset opening are determined according to the operation performance of different air conditioners, but the operation performance of each air conditioner is a determined value, and the first preset opening and the second preset opening selected by the corresponding expansion valve are also determined values, specifically, the selection criteria of the first preset opening and the second preset opening are that when the air conditioner is in a normal operation state, the maximum opening value and the minimum opening value of the expansion valve are obtained, and the first preset opening is larger than the value of the second preset opening. For example, when the air conditioner normally operates, the opening degree of the expansion valve is in the range of 30% to 70%, the first preset opening degree is 70%, and the second preset temperature is 30%.
Claims (3)
1. An air conditioner, characterized in that: the air-liquid separator comprises a closed barrel, an air inlet pipeline and an outlet pipeline which are connected to the barrel, wherein the outlet pipeline comprises an inner pipeline arranged inside the barrel and an outer pipeline extending out of the barrel, two liquid return pipelines, namely a first liquid return pipeline and a second liquid return pipeline, are connected between the outer pipeline and the bottom of the barrel, electric control valves capable of controlling whether the liquid return pipelines circulate or not are arranged on the different liquid return pipelines, a first electric control valve is arranged on the first liquid return pipeline, a second electric control valve is arranged on the second liquid return pipeline, and the first liquid return pipeline and the second liquid return pipeline extend into the barrel at different heights; the pipe orifice of the internal pipeline is positioned at the upper part of the cylinder body and is not higher than the pipe orifice of the air inlet pipeline in the cylinder body; the air inlet pipeline is connected with the indoor machine heat exchanger, the outlet pipeline is connected with an inlet of the compressor, the outdoor machine heat exchanger is respectively connected with an outlet of the indoor machine heat exchanger and an outlet of the compressor, and the electric control valves on the liquid return pipelines are electrically connected with the controller; the controller is electrically connected with the detector and controls the opening and closing of each path of electric control valve on the liquid return pipeline according to a detection signal fed back by the detector; an expansion valve is arranged on a connecting pipeline of the indoor unit heat exchanger and the outdoor unit heat exchanger, and the expansion valve is connected with the detector; the detection signal detected by the detector is the difference value of the exhaust temperature of the compressor and the saturation temperature corresponding to the exhaust pressure, or the detection signal detected by the detector is the opening value of the expansion valve;
when a detection signal detected by the detector is greater than a first preset value, the controller controls the first electric control valve and the second electric control valve to be opened; when the detection signal detected by the detector is smaller than a second preset value, the controller controls the first electric control valve at the higher position in the cylinder body to be closed and opens the second electric control valve at the lower position.
2. The air conditioner according to claim 1, wherein: the electric control valve is an electromagnetic valve or an electronic expansion valve.
3. The air conditioner according to claim 1, wherein: and a filter is arranged at the pipe orifice of the liquid return pipeline extending into the cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710488498.4A CN107314579B (en) | 2017-06-23 | 2017-06-23 | Air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710488498.4A CN107314579B (en) | 2017-06-23 | 2017-06-23 | Air conditioner |
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| CN107314579A CN107314579A (en) | 2017-11-03 |
| CN107314579B true CN107314579B (en) | 2020-11-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028656B (en) * | 2018-07-04 | 2020-12-08 | 青岛海信日立空调系统有限公司 | Control method and device for heat pump |
| CN109140847B (en) * | 2018-10-09 | 2024-03-22 | 河南城建学院 | Multi-channel oil return float type gas-liquid separator |
| CN111435041A (en) * | 2019-01-11 | 2020-07-21 | 青岛海尔智能技术研发有限公司 | Compression type refrigerating system and refrigerating and freezing device |
| CN110542251A (en) * | 2019-10-21 | 2019-12-06 | 南京天加环境科技有限公司 | Improved gas-liquid separator |
| CN115435514A (en) * | 2021-06-04 | 2022-12-06 | 青岛海尔智能技术研发有限公司 | Refrigerating system and air conditioner |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100560684B1 (en) * | 2004-01-14 | 2006-03-16 | 삼성전자주식회사 | Refrigerating cycle apparatus |
| CN1952495A (en) * | 2005-10-17 | 2007-04-25 | 乐金电子(天津)电器有限公司 | Outdoor set of air-conditioner |
| CN201748724U (en) * | 2010-07-29 | 2011-02-16 | 宁波奥克斯电气有限公司 | Gas-liquid separator |
| CN103388940B (en) * | 2012-05-08 | 2015-05-20 | 珠海格力电器股份有限公司 | Bidirectional flash evaporator and air conditioner comprising same |
| CN102759159B (en) * | 2012-08-01 | 2016-06-01 | 北京德能恒信科技有限公司 | A kind of heat pipe hot pump composite system |
| CN104279804A (en) * | 2013-07-05 | 2015-01-14 | 珠海格力电器股份有限公司 | Gas-liquid separator, air conditioner and air conditioner liquid return control method |
| CN203478753U (en) * | 2013-07-29 | 2014-03-12 | 广东志高暖通设备股份有限公司 | Air-conditioning unit and gas-liquid separator thereof |
| CN203489553U (en) * | 2013-09-17 | 2014-03-19 | 青岛海信日立空调系统有限公司 | Multi-hole-type gas-liquid separator |
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