CN111102755B - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
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- CN111102755B CN111102755B CN201911313052.3A CN201911313052A CN111102755B CN 111102755 B CN111102755 B CN 111102755B CN 201911313052 A CN201911313052 A CN 201911313052A CN 111102755 B CN111102755 B CN 111102755B
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- Prior art keywords
- heat exchanger
- air conditioning
- conditioning system
- refrigerant
- pipeline
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 53
- 239000003507 refrigerant Substances 0.000 claims abstract description 94
- 230000007246 mechanism Effects 0.000 claims description 15
- 239000011552 falling film Substances 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 abstract description 56
- 238000005461 lubrication Methods 0.000 abstract description 10
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 239000000498 cooling water Substances 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000001704 evaporation Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Images
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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- 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
- F25B31/002—Lubrication
-
- 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
- F25B31/006—Cooling of compressor or motor
- F25B31/008—Cooling of compressor or motor by injecting a liquid
-
- 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
- F25B39/02—Evaporators
-
- 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
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application provides an air conditioning system, this air conditioning system includes compressor, first heat exchanger, second heat exchanger and throttling arrangement, and the compressor links to each other through first pipeline with first heat exchanger, and first heat exchanger passes through the second pipeline with the second heat exchanger and links to each other, and the second heat exchanger passes through the third pipeline with the compressor and links to each other, and throttling arrangement sets up on the second pipeline. The air conditioning system further comprises a bypass pipeline, and the bypass pipeline is connected between the bottom of the first heat exchanger and the bottom of the second heat exchanger. Liquid level between the second heat exchanger and the first heat exchanger is balanced through the bypass pipeline, then liquid refrigerant that gathers in the second heat exchanger in time shifts to the first heat exchanger, just so can have liquid refrigerant in the first heat exchanger always, when standby unit is next started, when the bearing needs the refrigerant lubrication before the compressor operation, just can not take place not to extract the liquid refrigerant in the condenser and come the problem of lubrication and cooling bearing and unusual the improvement unit stability.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to an air conditioning system.
Background
At the present stage, people pursue 'no oiling', a new refrigerant unit is derived in the market, and a bearing of a compressor is lubricated and cooled only by a refrigerant; when the unit is in operation, the refrigerant in the condenser is pumped into the compressed bearing 6 by the refrigerant pump 5 for lubrication and cooling.
In addition, in order to improve the heat exchange efficiency, most of the existing units adopt a falling film evaporator unit, as shown in fig. 1, the falling film evaporator unit includes: compressor 1, condenser 2, evaporimeter 3, throttle component 4, refrigerant pump 5 and bearing 6. The throttling liquid path of falling film evaporator unit is generally connected to 3 tops of evaporimeter from 2 bottoms of condenser, and when the unit was operated, because the liquid in 2 highly compressed effects in condenser were drawn to 3 tops of evaporimeter and sprayed the liquid-homogenizing plate in condenser 2, carry out the liquid-homogenizing and fall the liquid film to the evaporating pipe with the refrigerant through the liquid-homogenizing plate again on, carry out the evaporation heat transfer and reach heat transfer effect. However, due to the structure that the throttling liquid path of the falling film evaporator set is connected from the bottom of the condenser 2 to the top of the evaporator 3, the refrigerant liquid in the evaporator 3 cannot directly flow into the condenser 2.
When the falling film evaporator unit is stopped, the compressor 1 is not operated, but the cooling water pump and the chilled water pump are still operated, the temperature of the chilled water is lower than that of the cooling water, this causes the gaseous refrigerant in the evaporator 3 to exchange heat under the circulation of the cooling water to become a liquid refrigerant, and the liquid refrigerant in the condenser 2 to become a gaseous refrigerant under the heat exchange with the cooling water, and the gaseous refrigerant is transferred into the evaporator 3 through the port of the compressor 1, and is changed into liquid refrigerant through the heat exchange between the evaporator 3 and the chilled water, after the circulation is carried out for many times, all the liquid refrigerant in the condenser 2 is transferred to the evaporator 3, so that when the unit is started next time, when the bearing 6 needs refrigerant lubrication before the compressor 1 operates, the refrigerant pump 5 can not pump the liquid refrigerant in the condenser 2 to lubricate and cool the bearing 6, so that the unit can not be started or the starting is abnormal.
Disclosure of Invention
The embodiment of the invention provides an air conditioning system, which aims to solve the technical problem that an air conditioning unit is abnormally operated due to liquid accumulation in an evaporator in the air conditioning system in the prior art.
The embodiment of the application provides an air conditioning system, including compressor, first heat exchanger, second heat exchanger and throttling arrangement, the compressor links to each other through first pipeline with first heat exchanger, and first heat exchanger passes through the second pipeline with the second heat exchanger and links to each other, and the second heat exchanger passes through the third pipeline with the compressor and links to each other, and throttling arrangement sets up on the second pipeline, and air conditioning system still includes: and the bypass pipeline is connected between the bottom of the first heat exchanger and the bottom of the second heat exchanger.
In one embodiment, a control valve is provided on the bypass line.
In one embodiment, the control valve is a solenoid valve.
In one embodiment, the air conditioning system further comprises: the power mechanism is connected with the compressor and used for driving the compressor to operate;
and the refrigerant recovery pipeline is connected between the power mechanism and the first heat exchanger and used for recovering the refrigerant to supply the power mechanism.
In one embodiment, a refrigerant pump is provided in the refrigerant recovery line.
In one embodiment, the power mechanism comprises a motor and a bearing component which is matched with the motor, and the motor is in driving connection with the compressor.
In one embodiment, the first heat exchanger is a condenser and the second heat exchanger is an evaporator.
In one embodiment, the evaporator is a falling film evaporator.
In one embodiment, the second line connects the bottom of the condenser to the top of the evaporator.
In one embodiment, the air conditioning system is a falling film unit air conditioning system.
In the above embodiment, when the air conditioning system operates, the refrigerant in the evaporator absorbs heat in the freezing water under the action of work of the compressor and evaporates into a gaseous refrigerant, and is discharged into the first heat exchanger through the compressor and the first pipeline connected with the compressor, the gaseous refrigerant and the cooling water in the first heat exchanger exchange heat and change into a liquid refrigerant, the liquid refrigerant in the cooler is introduced to the top of the second heat exchanger through the second pipeline and is injected into the second heat exchanger for heat exchange, the circulation is performed in such a way to achieve normal refrigeration of the air conditioning system, and when the unit operates, the bypass pipeline is closed and is not passed through. When the air conditioning system is shut down, the compressor does not operate, but because cooling water pump and chilled water pump are still continuing to operate, the temperature of chilled water is often all can be lower than the temperature of cooling water, lead to the gaseous refrigerant in the second heat exchanger to carry out the heat transfer and become liquid refrigerant under the circulation effect of cooling water like this, and the liquid refrigerant in the first heat exchanger can become gaseous refrigerant under the heat transfer with the cooling water, and gaseous refrigerant can pass through the compressor mouth and shift to the evaporimeter, and become liquid refrigerant at second heat exchanger and chilled water heat transfer, so circulate many times and can cause the liquid refrigerant of condenser to all shift to the second heat exchanger in. If the electromagnetic valve of the bypass pipeline is closed and the bypass pipeline is not communicated, the liquid refrigerant in the first heat exchanger cannot be extracted to lubricate and cool the bearing when the bearing needs refrigerant lubrication before the compressor runs when the unit is started next time, and therefore the unit cannot be started or is abnormally started. Therefore, the bypass pipeline is opened at the moment, the liquid level between the second heat exchanger and the first heat exchanger is balanced, and the liquid refrigerant accumulated in the second heat exchanger is timely transferred to the first heat exchanger, so that the liquid refrigerant always exists in the first heat exchanger, and when the standby unit is started next time and a bearing needs refrigerant lubrication before the compressor runs, the problem that the liquid refrigerant in the condenser cannot be extracted to lubricate and cool the bearing is solved, and the unit stability is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of an overall structure of an air conditioning system according to the prior art;
fig. 2 is an overall structural view of an embodiment of an air conditioning system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
The air conditioning system aims at solving the technical problem that an air conditioning unit is abnormal in operation due to liquid accumulation in an evaporator in the air conditioning system in the prior art. The invention provides an air conditioning system, which aims to improve the reliability of a unit. Fig. 2 shows an embodiment of the air conditioning system of the present invention, which includes a compressor 10, a first heat exchanger 20, a second heat exchanger 30, and a throttling device 40, wherein the compressor 10 is connected to the first heat exchanger 20 through a first pipeline, the first heat exchanger 20 is connected to the second heat exchanger 30 through a second pipeline, the second heat exchanger 30 is connected to the compressor 10 through a third pipeline, and the throttling device 40 is disposed on the second pipeline. In addition, the air conditioning system further includes a bypass line 50, and the bypass line 50 is connected between the bottom of the first heat exchanger 20 and the bottom of the second heat exchanger 30.
By applying the technical scheme of the invention, when the air conditioning system operates, the refrigerant in the evaporator absorbs the heat in the freezing water under the action of the work of the compressor 10 and is evaporated into the gaseous refrigerant, the gaseous refrigerant and the cooling water in the first heat exchanger 20 are discharged into the first heat exchanger 20 through the compressor 10 and the first pipeline connected with the compressor, the gaseous refrigerant and the cooling water in the first heat exchanger 20 exchange heat and are changed into the liquid refrigerant, the liquid refrigerant in the cooler is led to the top of the second heat exchanger 30 through the second pipeline and is sprayed into the second heat exchanger 30 for heat exchange, the circulation is carried out in such a way to achieve the normal refrigeration of the air conditioning system, and when the unit operates, the bypass pipeline 50 is closed and does not. When the air conditioning system is stopped, the compressor 10 does not operate, but because the cooling water pump and the chilled water pump are still operating continuously, the temperature of chilled water is often lower than that of the cooling water, so that the gaseous refrigerant in the second heat exchanger 30 is subjected to heat exchange under the circulation action of the cooling water to become a liquid refrigerant, the liquid refrigerant in the first heat exchanger 20 is subjected to heat exchange with the cooling water to become a gaseous refrigerant, the gaseous refrigerant is transferred to the evaporator through the opening of the compressor 10 and is subjected to heat exchange with the chilled water to become a liquid refrigerant, and the liquid refrigerant in the condenser is completely transferred to the second heat exchanger 30 after being circulated for multiple times. If the electromagnetic valve of the bypass pipeline 50 is closed and the bypass pipeline 50 is not communicated, the liquid refrigerant in the first heat exchanger 20 cannot be extracted to lubricate and cool the bearing when the bearing needs refrigerant lubrication before the compressor 10 operates when the unit is started next time, so that the unit cannot be started or is abnormally started. Therefore, at this time, the bypass pipeline 50 is opened to balance the liquid level between the second heat exchanger 30 and the first heat exchanger 20, and the liquid refrigerant accumulated in the second heat exchanger 30 is transferred to the first heat exchanger 20 in time, so that the liquid refrigerant always exists in the first heat exchanger 20, and when the standby unit is started next time and the bearing needs refrigerant lubrication before the compressor 10 operates, the problem that the liquid refrigerant in the condenser cannot be extracted to lubricate and cool the bearing is solved, and the unit stability is improved abnormally.
Optionally, the liquid inlet end of the second pipeline is connected to the liquid taking port at the bottom of the first heat exchanger 20, and the liquid outlet end is connected to the liquid outlet at the top of the second heat exchanger 30.
As an alternative implementation, as shown in fig. 2, in the solution of the present embodiment, the first heat exchanger 20 is a condenser, and the second heat exchanger 30 is an evaporator. More preferably, the evaporator is a falling film evaporator, and comprises at least one suction port, at the top of the evaporator and at least one liquid inlet at the upper part of a liquid equalizing pipe of the falling film evaporator. Optionally, in the technical scheme of this embodiment, the second pipeline is connected to the bottom of the condenser and the top of the evaporator, so as to better achieve evaporation of the liquid refrigerant. When the evaporator is used, the refrigerant is sprayed onto the liquid equalizing plate in the evaporator from the second pipeline, the liquid equalizing plate is subjected to liquid equalizing and then falls onto the evaporation pipe for heat exchange, and the normal refrigeration of the air conditioning system is achieved through circulation. In the technical solution of this embodiment, the condenser includes at least one exhaust port located at the top of the condenser, at least one liquid outlet located at the bottom of the condenser, and the communication opening of the bypass line 50 is located at the bottom of the condenser.
As another alternative embodiment, the first heat exchanger 20 may be an evaporator, and the second heat exchanger 30 may be a condenser. The embodiment can be applied to the heating condition of the air conditioning system.
More preferably, in the solution of the present embodiment, a control valve 51 is disposed on the bypass line 50 to control the operation of the bypass line 50. Optionally, the control valve 51 is a solenoid valve to facilitate more automated control.
Specifically, the correspondence between the air conditioning system conditions and the state of the control valve 51:
| operating conditions of air conditioning | Control valve | 51 state |
| Operation of air conditioning system | Close off | |
| Air conditioning system shutdown | Open |
As shown in fig. 2, optionally, in the technical solution of the present embodiment, the air conditioning system further includes a power mechanism 60 and a refrigerant recovery pipeline 70, the power mechanism 60 is connected to the compressor 10 and is used for driving the compressor 10 to operate, the refrigerant recovery pipeline 70 is connected between the power mechanism 60 and the first heat exchanger 20, and the refrigerant recovery pipeline 70 is used for recovering the refrigerant and supplying the refrigerant to the power mechanism 60. When the air conditioning unit is used, the refrigerant is recovered through the refrigerant recovery pipeline 70 and is supplied to the power mechanism 60, so that the power mechanism 60 can be lubricated and cooled normally, and the air conditioning unit is started normally. Optionally, the power mechanism 60 includes a motor and a bearing component installed in cooperation with the motor, and the motor is drivingly connected to the compressor 10. The refrigerant recovered by the refrigerant recovery pipeline 70 is respectively supplied to the motor and elements such as a bearing part and the like which are installed in a matching way with the motor, so that the effective lubrication and cooling of the power mechanism 70 are realized. More preferably, the refrigerant recovery pipeline 70 is provided with a refrigerant pump 71, and the refrigerant in the first heat exchanger 20 is pumped by the refrigerant pump 71, so as to realize automatic recovery of the startup refrigerant. In practical use, when the refrigerant pump 71 cannot pump the liquid refrigerant in the condenser to lubricate and cool the bearing, the control valve 51 on the bypass pipeline 50 is opened, so that the liquid refrigerant accumulated in the second heat exchanger 30 can be timely transferred to the first heat exchanger 20, and thus the liquid refrigerant always exists in the first heat exchanger 20, and when the standby unit is started next time and the bearing needs refrigerant lubrication before the compressor 10 operates, the problem and abnormality that the refrigerant pump 71 cannot pump the liquid refrigerant in the condenser to lubricate and cool the bearing cannot occur.
It should be noted that the technical solution of the present invention is particularly suitable for a falling film type unit air conditioning system.
According to the technical scheme, the bypass pipelines 50 are arranged at the bottom of the evaporator and the bottom of the condenser, so that liquid refrigerant of the evaporator can flow into the condenser, the refrigerant pump 71 can be ensured to take refrigerant liquid in the condenser to lubricate and cool the bearing of the compressor 10, the reliability of the unit is improved, the problem that the compressor 10 cannot be lubricated and cooled by taking liquid when the air conditioning system is started again after being stopped is solved, and the reliability of the unit is improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and variations of the embodiment of the present invention may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An air conditioning system, comprising a compressor (10), a first heat exchanger (20), a second heat exchanger (30) and a throttling device (40), wherein the compressor (10) is connected with the first heat exchanger (20) through a first pipeline, the first heat exchanger (20) is connected with the second heat exchanger (30) through a second pipeline, the second heat exchanger (30) is connected with the compressor (10) through a third pipeline, and the throttling device (40) is arranged on the second pipeline,
the air conditioning system further includes:
the bypass pipeline (50) is connected between the bottom of the first heat exchanger (20) and the bottom of the second heat exchanger (30), a control valve (51) is arranged on the bypass pipeline (50), when the air conditioning system operates, the control valve (51) is closed, and when the air conditioning system stops, the control valve (51) is opened.
2. Air conditioning system according to claim 1, characterized in that the control valve (51) is a solenoid valve.
3. The air conditioning system of claim 1, further comprising: the power mechanism (60) is connected with the compressor (10) and is used for driving the compressor (10) to run;
and a refrigerant recovery pipeline (70) connected between the power mechanism (60) and the first heat exchanger (20), wherein the refrigerant recovery pipeline (70) is used for recovering the refrigerant and supplying the refrigerant to the power mechanism (60).
4. The air conditioning system as claimed in claim 3, wherein a refrigerant pump (71) is provided on the refrigerant recovery line (70).
5. Air conditioning system according to claim 3, characterized in that said power means (60) comprise an electric motor and a bearing element fitted to said electric motor, said electric motor being drivingly connected to said compressor (10).
6. Air conditioning system according to claim 1, wherein the first heat exchanger (20) is a condenser and the second heat exchanger (30) is an evaporator.
7. The air conditioning system of claim 6, wherein the evaporator is a falling film evaporator.
8. The air conditioning system of claim 7, wherein the second conduit connects a bottom of the condenser to a top of the evaporator.
9. The air conditioning system of claim 1, wherein the air conditioning system is a falling film unit air conditioning system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313052.3A CN111102755B (en) | 2019-12-18 | 2019-12-18 | Air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313052.3A CN111102755B (en) | 2019-12-18 | 2019-12-18 | Air conditioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111102755A CN111102755A (en) | 2020-05-05 |
| CN111102755B true CN111102755B (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911313052.3A Active CN111102755B (en) | 2019-12-18 | 2019-12-18 | Air conditioning system |
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| Country | Link |
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| CN (1) | CN111102755B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6176092B1 (en) * | 1998-10-09 | 2001-01-23 | American Standard Inc. | Oil-free liquid chiller |
| CN101191686B (en) * | 2006-11-30 | 2011-01-19 | 海尔集团公司 | Air conditioner for implementing high and low pressure side pressure balancing |
| CN208952452U (en) * | 2018-07-25 | 2019-06-07 | 中国科学院广州能源研究所 | A kind of quasi- second level ultralow-temperature air energy heat pump of double-condenser |
| CN109708198B (en) * | 2018-12-27 | 2019-12-27 | 珠海格力电器股份有限公司 | Air conditioner system, air conditioner and method for controlling air conditioner |
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Effective date of registration: 20231101 Address after: 519070, 1st Floor, Building 7, No. 789 Jinji Road, Qianshan, Zhuhai, Guangdong Province Patentee after: Zhuhai Gree Green Control Technology Co.,Ltd. Address before: 519070 No. six Jinji Road West, Zhuhai, Guangdong Patentee before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI |
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