CN106524558A - Multi-split heat pump system based on three-stage centrifugal compressor - Google Patents
Multi-split heat pump system based on three-stage centrifugal compressor Download PDFInfo
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- CN106524558A CN106524558A CN201610990564.3A CN201610990564A CN106524558A CN 106524558 A CN106524558 A CN 106524558A CN 201610990564 A CN201610990564 A CN 201610990564A CN 106524558 A CN106524558 A CN 106524558A
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- valve
- compression chamber
- stage compression
- heat pump
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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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- 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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a multi-split heat pump system based on a three-stage centrifugal compressor. The multi-split heat pump system comprises the compressor, a first four-way valve, a gas-liquid separator, a condenser, an air pipe stop valve, an oil separator, a main electronic expansion valve, a liquid pipe stop valve and an evaporator, wherein the compressor comprises a first-stage compression cavity, a second-stage compression cavity and a third-stage compression cavity; the air inlet of the first-stage compression cavity is connected with the air outlet of the gas-liquid separator; two ends of a second four-way valve are connected with the air inlet and the air outlet of the second-stage compression cavity respectively; the air outlet of the first-stage compression cavity and the air inlet of the second-stage compression cavity are connected with two ends of a first three-way valve respectively; the air outlet of the second-stage compression cavity and the air inlet of the third-stage compression cavity are connected with two ends of a second three-way valve respectively; the air outlet of the third-stage compression cavity is connected with the oil separator; and two ends of a third four-way valve are connected with the first three-way valve and the second three-way valve respectively. The multi-split heat pump system can meet performance requirements under different loads and is high in efficiency under part of loads.
Description
Technical field
The present invention relates to a kind of heat pump, specifically, be related to it is a kind of with the multi-joint of three-level centrifugal compressor
Machine heat pump.
Background technology
Adopting scroll compressor more in existing the multi-connected machine heat pump field, especially under low temperature ambient conditions, compressor
It is less efficient, and centrifugal compressor is used for large-scale cooling-water machine system, although efficiency is higher than scroll compressor, but by
Limit in its size and pressure ratio, it is impossible to for the multiple on-line system of little cold, multi-connected machine can not be applied transformations to well
System.Multi-connected machine heat pump all constantly can be reduced with the reduction of ambient temperature, heating capacity and heating efficiency, and people are to heating capacity
Demand be but continuously increased with the decline of ambient temperature.Major technique reason is the scroll compression that normal air source heat pump is adopted
When contracting machine is worked at low ambient temperatures, the delivery temperature of compressor can exceed the working range that compressor is allowed, and compressor occurs
Frequently start and stop, it is impossible to normal work, when ambient temperature is dropped to below 5 DEG C, evaporator surface can also frosting so that heat exchange system
Number is reduced, and heat pump needs continuous defrost to ensure the normal operation of system, and greatly reduces the comfortableness of user.In addition,
In order to absorb heat from outdoor air, its evaporating temperature will be preferably minimized heat pump, now the inspiratory volume increase of compressor, system
Refrigerant circulation reduces, and the pressure ratio increase of compressor, and volumetric efficiency declines, and heat pump heating capacity and COP will significantly
Reduce.The heating capacity that air source heat pump is improved under worst cold case is also the problem that air-conditioning circle needs to solve all the time.
In order to improve the heating capacity of multiple on-line system under worst cold case, air-conditioning heat pump researcher did extensive work, industry
Interior enterprise is proposed low-temperature strong-heating multi-split system in recent years successively, employs mostly quasi- two-stage compression system, also has and passes through
Increase the mode of supplementary module, release real two-stage compressor multiple on-line system.But, system is due to its two-stage compression module
It is separately provided, needs to be connected with host module by pipeline during in-site installation, cause floor space to increase, and it is difficult to increase installation
Degree, system cannot realize that the outer machine multiple stage of big number is in parallel, it is impossible to meet the requirement of bigger load.
The content of the invention
The present invention is separately provided for the multi-stage compression module for solving existing multi-connected machine heat pump, is needed during in-site installation
It is connected with host module by pipeline, is increased with floor space, a series of problems, such as installation difficulty is high, it is proposed that is a kind of multi-joint
Machine heat pump, can solve the above problems.
In order to solve above-mentioned technical problem, the present invention is employed the following technical solutions and is achieved：
A kind of multi-connected machine heat pump based on three-level centrifugal compressor, including compressor, the first cross valve and described first
The condenser and first four-way of the c ends connection of the gas-liquid separator and first cross valve of the s ends connection of cross valve
The oil eliminator of the d ends connection of the trachea stop valve and first cross valve of the e ends connection of valve, is connected with the condenser
Main electric expansion valve, the liquid pipe stop valve being connected with the main electric expansion valve, two ends respectively with the trachea stop valve and
The vaporizer of liquid pipe stop valve connection, the compressor include one stage of compression chamber, two-stage compression chamber and the three-level pressure being sequentially connected with
Contracting chamber, the air inlet in the one stage of compression chamber are connected with the air vent of the gas-liquid separator by the second cross valve, and described
The other two ends of two cross valves are connected with the air inlet and air vent in the two-stage compression chamber respectively, the row in the one stage of compression chamber
QI KOU is connected the two ends of the first three-way valve respectively with the air inlet in two-stage compression chamber, the air vent in the two-stage compression chamber with it is described
The air inlet in three stage compression chamber connects the two ends of the second three-way valve respectively, and the air vent in the three stage compression chamber passes through the 3rd four-way
Valve is connected with the oil eliminator, the other two ends of the 3rd cross valve the second three-way valve respectively with first three-way valve
Connection.
Further, described multi-connected machine heat pump also includes the first sheet heat exchanger, and first sheet heat exchanger includes
First heat exchanger channels and the first air supply passage, first heat exchanger channels are connected to the main electric expansion valve and liquid pipe stop valve
Between, one end of first air supply passage is connected with the main electric expansion valve by the first electric expansion valve, other end
It is connected with the air inlet in the two-stage compression chamber.
Further, described multi-connected machine heat pump also includes the second sheet heat exchanger, and second sheet heat exchanger includes
Second heat exchanger channels and the second air supply passage, described second heat exchanger channels one end are connected with first heat exchanger channels, and in addition one
End is connected with the liquid pipe stop valve, and described second air supply passage one end is logical with the described first heat exchange by the second electric expansion valve
Road connects, and other end is connected with the air inlet in the three stage compression chamber.
Further, the compressor be centrifugal compressor, the one stage of compression chamber, two-stage compression chamber and three stage compression
Intracavity is respectively arranged with impeller, and the size of each impeller is not all identical.
Further, the outfan of the condenser is also connected with the input of the gas-liquid separator by a path,
Liquid injection valve is provided with the path.
Further, the outfan of the oil eliminator is connected with the input of the gas-liquid separator by feather valve.
Compared with prior art, advantages of the present invention and good effect are：The present invention based on three-level centrifugal compressor
Multi-connected machine heat pump, by the flow direction for adjusting two three-way valve and the second cross valve and the 3rd cross valve, can realize respectively
One-level, two grades, the different tandem compounds of three-level, to meet the performance requirement under the different load of system, limit of power is from 3Hp-
75Hp is adjustable, may replace one or more scroll compressors, and under sub-load, system effectiveness is high, therefore, remaining tradition
Outside the advantage of centrifugal compressor, compressor operation scope can also be widened, to multiple on-line system, even unit machine system
System, domestic air conditioning can use, energy-efficient so as to be capable of achieving.
After the detailed description of embodiment of the present invention is read in conjunction with the accompanying, the other features and advantages of the invention will become more
Plus it is clear.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of embodiment system of the multi-connected machine heat pump with three-level centrifugal compressor proposed by the invention
System figure.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment one, the present embodiment propose a kind of multi-connected machine heat pump based on three-level centrifugal compressor, such as Fig. 1
It is shown, a kind of multi-connected machine heat pump, including compressor 1, the first cross valve 2, and the first cross valve the connection of s ends gas-liquid point
From device 4, and the first cross valve 2 c ends connection condenser 5, and the first cross valve 2 e ends connection trachea stop valve 3, and
The oil eliminator 14 of the d ends connection of the first cross valve 2, the main electric expansion valve 6 being connected with condenser 5, and main electric expansion valve 6
The vaporizer 8 that connected liquid pipe stop valve 7, two ends is connected with trachea stop valve 3 and liquid pipe stop valve 7 respectively, compressor 1 include
One stage of compression chamber 10, two-stage compression chamber 11 and the three stage compression chamber 12 being sequentially connected with, the air inlet in one stage of compression chamber 10 is by the
Two cross valves 19 are connected with the air vent of gas-liquid separator 4, the other two ends of the second cross valve 19 respectively with two-stage compression chamber 11
Air inlet and air vent connection, the air vent in one stage of compression chamber 10 is connected the one or three respectively with the air inlet in two-stage compression chamber 11
The two ends of port valve 9, the air vent in two-stage compression chamber 11 are connected the second three-way valve 13 respectively with the air inlet in three stage compression chamber 12
Two ends, the air vent in three stage compression chamber 12 are connected with oil eliminator 14 by the 3rd cross valve 20, and the 3rd cross valve 20 is in addition
Two ends are connected with the second three-way valve 13 of the first three-way valve 9 respectively.The multi-connected machine heat pump of the present invention, compressor include one-level
Compression chamber, two-stage compression chamber, three stage compression chamber, three are designed for monolithic construction, need not be respectively mounted, by adjusting two three
Port valve and the second cross valve 19, the flow direction of the 3rd cross valve 20, can realize one stage of compression chamber, two-stage compression chamber, three-level respectively
The different tandem compounds of compression chamber, to meet the performance requirement under the different load of system, limit of power is adjustable from 3Hp-75Hp,
One or more scroll compressors are may replace, system effectiveness is high under sub-load, additionally, the compressor in the system is retaining
Outside the advantage of conventional centrifugal compressor, compressor operation scope can also be widened, to multiple on-line system, even singly
First machine system, domestic air conditioning can use, energy-efficient so as to be capable of achieving.
Multi-connected machine heat pump in the present embodiment also includes the first sheet heat exchanger 15, as shown in figure 1, the first sheet heat exchanger
15 include the first heat exchanger channels and the first air supply passage, and the first heat exchanger channels are connected to main electric expansion valve 6 and liquid pipe stop valve 7
Between, one end of the first air supply passage is connected with main electric expansion valve 6 by the first electric expansion valve 16, other end with two grades
The air inlet connection of compression chamber 11.When the pressure at expulsion of one stage of compression chamber output is inadequate, by controlling the first electric expansion valve
16 open, and are which carries out QI invigorating, to improve the pressure at expulsion in one stage of compression chamber, improve compression efficiency.
As a same reason, multi-connected machine heat pump also includes the second sheet heat exchanger 17, and the second sheet heat exchanger 17 includes second
Heat exchanger channels and the second air supply passage, second heat exchanger channels one end are connected with the first heat exchanger channels, and other end is ended with liquid pipe
Valve 7 connects, and second air supply passage one end is connected with the first heat exchanger channels by the second electric expansion valve 18, other end and three-level
The air inlet connection of compression chamber 12.When the pressure at expulsion of two-stage compression chamber output is inadequate, by controlling the second electric expansion valve
18 open, and are which carries out QI invigorating, to improve the pressure at expulsion in two-stage compression chamber.
Additionally, the first sheet heat exchanger 15 and the second sheet heat exchanger 17 can also be substituted using flash tank realize, equally can be with
It is embodied as two-stage compression chamber, the function of three stage compression chamber QI invigorating.
Compressor 1 is centrifugal compressor, is divided in the one stage of compression chamber 10, two-stage compression chamber 11 and three stage compression chamber 12
Impeller is not provided with, each impeller size is not all identical, makes the compressed capability of every one-level variant.Control logic then can be with root
According to the difference of load, the flow direction of regulating three-way valve, one-level can be realized respectively, two grades, the different tandem compounds of three-level to meet are
Performance requirement under the different load of system.For example：
When press capacity load is 10%, using the second cross valve 19, the first three-way valve 9 and pipeline by one stage of compression chamber 10,
The bypass of two-stage compression chamber 11 is fallen, and is now only compressed using three stage compression chamber 12, meets performance requirement.
When press ability desirable load is 50%, the second cross valve 19 is by flow direction variation to two-stage compression chamber the 11, the 2nd 3
13 flow of port valve is oriented to and adjusts to three stage compression chamber 12, and now one stage of compression chamber 10 does not play a role, and realizes two-stage compression chamber 11+
The tandem compound in three stage compression chamber 12, meets performance requirement.
When press ability desirable load is 100%, the second cross valve 19 by flow direction variation to one stage of compression chamber 10, first
9 flow of three-way valve is oriented to and adjusts to two-stage compression chamber 11, the second three-way valve 13 and pipeline bypass three stage compression chamber 12, now realizes
11 tandem compound of one stage of compression chamber 10+ two-stage compressions chamber, meets performance requirement.
When system is in ultralow-temperature operation conditions, higher to performance burden requirement, the second cross valve 19 is by flow direction variation to
Level compression chamber 10,9 flow of the first three-way valve are oriented to and adjust to two-stage compression chamber 11, and 13 flow direction variation of the second three-way valve is to three-level pressure
Contracting chamber 12, now realizes the tandem compound in one stage of compression chamber 10+ two-stage compressions chamber 11+ three stage compressions chamber 12, meets performance requirement.
The outfan of condenser 5 is also connected with the input of gas-liquid separator 4 by a path, and spray is provided with the path
Liquid valve 21.
The outfan of oil eliminator 14 is connected with the input of gas-liquid separator 4 by feather valve 22.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
Change, remodeling, addition or replacement that the those of ordinary skill in domain is made in the essential scope of the present invention, should also belong to this
Bright protection domain.
Claims (6)
1. a kind of multi-connected machine heat pump based on three-level centrifugal compressor, including compressor, the first cross valve and described
The condenser and the described 1st of the c ends connection of the gas-liquid separator and first cross valve of the s ends connection of one cross valve
The oil eliminator of the d ends connection of the trachea stop valve and first cross valve of the e ends connection of port valve, is connected with the condenser
The main electric expansion valve for connecing, the liquid pipe stop valve being connected with the main electric expansion valve, two ends respectively with the trachea stop valve
With the vaporizer of liquid pipe stop valve connection, it is characterised in that：One stage of compression chamber that the compressor includes being sequentially connected with, two grades of pressures
Contracting chamber and three stage compression chamber, the air inlet in the one stage of compression chamber pass through the air vent of the second cross valve and the gas-liquid separator
Connection, the other two ends of second cross valve are connected with the air inlet and air vent in the two-stage compression chamber respectively, and described one
The level air vent of compression chamber is connected the two ends of the first three-way valve respectively with the air inlet in two-stage compression chamber, the two-stage compression chamber
Air vent is connected the two ends of the second three-way valve, the air vent in the three stage compression chamber respectively with the air inlet in the three stage compression chamber
Be connected with the oil eliminator by the 3rd cross valve, the other two ends of the 3rd cross valve respectively with first three-way valve
The second three-way valve connection.
2. multi-connected machine heat pump according to claim 1, it is characterised in that：Described multi-connected machine heat pump also includes
First sheet heat exchanger, first sheet heat exchanger include the first heat exchanger channels and the first air supply passage, first heat exchanger channels
It is connected between the main electric expansion valve and liquid pipe stop valve, one end of first air supply passage passes through the first electronic expansion
Valve is connected with the main electric expansion valve, and other end is connected with the air inlet in the two-stage compression chamber.
3. multi-connected machine heat pump according to claim 2, it is characterised in that：Described multi-connected machine heat pump also includes
Second sheet heat exchanger, second sheet heat exchanger include the second heat exchanger channels and the second air supply passage, second heat exchanger channels
One end is connected with first heat exchanger channels, and other end is connected with the liquid pipe stop valve, described second air supply passage one end
It is connected with first heat exchanger channels by the second electric expansion valve, other end is connected with the air inlet in the three stage compression chamber
Connect.
4. the multi-connected machine heat pump according to any one of claim 1-3, it is characterised in that：The compressor is centrifugal
Compressor, the one stage of compression chamber, two-stage compression chamber and three stage compression intracavity are respectively arranged with impeller, and the size of each impeller is not complete
Portion is identical.
5. the multi-connected machine heat pump according to any one of claim 1-3, it is characterised in that：The outfan of the condenser
Also it is connected with the input of the gas-liquid separator by a path, on the path, is provided with liquid injection valve.
6. the multi-connected machine heat pump according to any one of claim 1-3, it is characterised in that：The output of the oil eliminator
End is connected with the input of the gas-liquid separator by feather valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610990564.3A CN106524558B (en) | 2016-11-10 | 2016-11-10 | Multi-split heat pump system based on three-stage centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610990564.3A CN106524558B (en) | 2016-11-10 | 2016-11-10 | Multi-split heat pump system based on three-stage centrifugal compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106524558A true CN106524558A (en) | 2017-03-22 |
| CN106524558B CN106524558B (en) | 2023-09-29 |
Family
ID=58351005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610990564.3A Active CN106524558B (en) | 2016-11-10 | 2016-11-10 | Multi-split heat pump system based on three-stage centrifugal compressor |
Country Status (1)
| Country | Link |
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| CN (1) | CN106524558B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682104A (en) * | 2019-02-12 | 2019-04-26 | 珠海格力电器股份有限公司 | Coolant circulating system and air conditioner |
| CN109682105A (en) * | 2019-02-12 | 2019-04-26 | 珠海格力电器股份有限公司 | Air-conditioning system |
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| US20100199694A1 (en) * | 2007-12-26 | 2010-08-12 | Taras Michael F | Refrigerant system with intercooler and liquid/vapor injection |
| CN203231582U (en) * | 2013-04-11 | 2013-10-09 | 东华大学 | Two-stage compression heat pump system with economizer and defrosting by means of hot gas bypassing |
| WO2014001090A1 (en) * | 2012-06-28 | 2014-01-03 | Sterling Industry Consult Gmbh | Method and pump arrangement for evacuating a chamber |
| CN104776483A (en) * | 2015-04-12 | 2015-07-15 | 北京工业大学 | Building-type concentrated heating heat pump system substituting for small-size boiler |
| CN206269419U (en) * | 2016-11-10 | 2017-06-20 | 青岛海尔中央空调有限公司 | A kind of multi-connected machine heat pump based on three-level centrifugal compressor |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100199694A1 (en) * | 2007-12-26 | 2010-08-12 | Taras Michael F | Refrigerant system with intercooler and liquid/vapor injection |
| WO2014001090A1 (en) * | 2012-06-28 | 2014-01-03 | Sterling Industry Consult Gmbh | Method and pump arrangement for evacuating a chamber |
| CN203231582U (en) * | 2013-04-11 | 2013-10-09 | 东华大学 | Two-stage compression heat pump system with economizer and defrosting by means of hot gas bypassing |
| CN104776483A (en) * | 2015-04-12 | 2015-07-15 | 北京工业大学 | Building-type concentrated heating heat pump system substituting for small-size boiler |
| CN206269419U (en) * | 2016-11-10 | 2017-06-20 | 青岛海尔中央空调有限公司 | A kind of multi-connected machine heat pump based on three-level centrifugal compressor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682104A (en) * | 2019-02-12 | 2019-04-26 | 珠海格力电器股份有限公司 | Coolant circulating system and air conditioner |
| CN109682105A (en) * | 2019-02-12 | 2019-04-26 | 珠海格力电器股份有限公司 | Air-conditioning system |
| CN109682105B (en) * | 2019-02-12 | 2024-04-09 | 珠海格力电器股份有限公司 | Air Conditioning System |
| CN109682104B (en) * | 2019-02-12 | 2024-06-07 | 珠海格力电器股份有限公司 | Refrigerant circulation system and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106524558B (en) | 2023-09-29 |
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