CN105841398A - Ejecting flow-increasing type heat pump air conditioner system and operation method thereof - Google Patents

Ejecting flow-increasing type heat pump air conditioner system and operation method thereof Download PDF

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Publication number
CN105841398A
CN105841398A CN201610224665.XA CN201610224665A CN105841398A CN 105841398 A CN105841398 A CN 105841398A CN 201610224665 A CN201610224665 A CN 201610224665A CN 105841398 A CN105841398 A CN 105841398A
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China
Prior art keywords
valve
pressure
injector
low
port
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CN201610224665.XA
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Chinese (zh)
Inventor
步应辉
李应林
马慧齐
夏学鹰
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Nanjing University
Nanjing Normal University
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Nanjing Normal University
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Priority to CN201610224665.XA priority Critical patent/CN105841398A/en
Publication of CN105841398A publication Critical patent/CN105841398A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses an ejecting flow-increasing type heat pump air conditioner system and an operation method thereof. The ejecting flow-increasing type heat pump air conditioner system comprises a compressor, an oil separator, a four-way valve, an outdoor side heat exchanger, an indoor side heat exchanger, a liquid accumulator, a one-way valve, an electromagnetic valve, an expansion valve, a dryer, an ejector and the like, wherein the oil separator, the outdoor side heat exchanger and the low-pressure liquid accumulator are both connected with the four-way valve; the compressor and the electromagnetic valve are both connected with the low-pressure liquid accumulator; the liquid accumulator and the electromagnetic valve are connected with the dryer; and the ejector and the expansion valve are connected in parallel. When the ejecting flow-increasing type heat pump air conditioner system operates in a refrigeration mode or a heating mode, the ejector and the expansion valve are connected in parallel to together achieve the throttling depressurization process of a system refrigerant and the flow-increasing recirculation process of a heat exchanger; and the system circulation refrigerant flow width can be adjusted by controlling the size of the expansion valve, so that the requirement for heat pump air conditioner system partial loads of a user are met.

Description

Injection incremental type heat pump type air conditioning system and operational approach thereof
Technical field
The present invention relates to a kind of injection incremental type heat pump type air conditioning system and operational approach thereof, belong to air-conditioning and refrigeration technology field.
Background technology
Current vapor compression heat pump is air conditioning unit can be divided into according to condensing mode that water cooling heat pump is air conditioning unit, air-cooled heat-pump air-conditioner Group and geo-source heat-pump air conditioner group.Wherein, water cooling heat pump is air conditioning unit is that logical supercooled water realizes heat exchange in condenser, but should Systematic comparison is complicated, needs extra increase water pump and cooling tower blood circulation, adds equipment cost, improve initial cost, simultaneously Equipment is arranged and is also subject to certain restrictions.Air-cooled heat-pump air-conditioner group uses forced ventilation mode to realize condenser inner refrigerant and air Heat exchange, it is when summer, outdoor environment temperature was higher, and heat exchange effect is poor, be easily caused system condensing pressure and condensation temperature Spend higher, thus affect the overall performance of refrigeration system;When winter heating, especially when ambient outdoor air humidity is bigger, steam Send out the easy frosting of device heat exchange surface, thus reduce the time that effectively heats of unit, reduce the overall heating performance of system.Source, ground Heat pump air conditioner unit has higher requirement to the water yield and the water quality at water source, there is cooling and heating load imbalance and building in actual application Geographical conditions etc. limit, and need substantial amounts of pipe laying space.
From the point of view of current situation and long-range its development, air-cooled heat-pump air-conditioner group still has the biggest development potentiality.But existing wind Cold evaporating condensation type heat exchanger, due to the refrigerant flow relative deficiency of channel interior, heat exchange area fails to be fully utilized, Its heat transfer effect need to improve further.
For this technical problem, the evaporating condensation type water chiller-heater unit of patent CN201520339702.2 by using injector, Can be to vaporizer (or evaporative condenser) feed flow under cooling in summer operating mode (or winter heating's operating mode).By cold-producing medium injection Recirculation, increases evaporation side entrance refrigerant flow, reduces the mass dryness fraction of biphase gas and liquid flow, improve the coefficient of heat transfer of vaporizer. But, this patented technology, because realize the reducing pressure by regulating flow process of system refrigerant only with injector, is configured without throttling accordingly Valve, thus can not control and regulate the flow of system circulating refrigerant, thus it is dynamic to heat pump air conditioner sub-load to be difficult in adapt to user The demand of regulation.
From the above analysis, the refrigerant flow in heat exchanger can be increased although with injector, thus improve changing of heat exchanger Hot property.But owing to injector self does not possess the ability of regulated fluid flow, it is difficult to adapt to user and the regulation of sub-load is wanted Ask, suddenly treat further to improve.
Summary of the invention
It is an object of the invention to for above the deficiencies in the prior art, it is provided that a kind of injection incremental type heat pump type air conditioning system, and it is provided Operational approach.
The present invention is achieved by the following technical solutions,
Injection incremental type heat pump type air conditioning system, including: compressor, oil eliminator, four-way change-over valve, outdoor heat exchanger, first Check valve, reservoir, device for drying and filtering, the first electromagnetic valve, injector, the second electromagnetic valve, expansion valve, the second check valve, room Inner side heat exchanger, low-pressure oil storage, the 3rd electromagnetic valve, the 3rd check valve and the 4th check valve;The outlet of described reservoir is with dry The entrance of filter is connected;The outlet of device for drying and filtering is divided into two-way, and a road is connected with the entrance of the first electromagnetic valve, another Lu Yu The entrance of two electromagnetic valves is connected;The outlet of described electromagnetic valve is connected with the high-pressure work arrival end A of injector, the low pressure of injector The port of export of injection arrival end B and the 3rd electromagnetic valve is connected, the arrival end of the 3rd electromagnetic valve and the outlet at bottom end of low-pressure oil storage It is connected;The port of export of described second electromagnetic valve is connected with expansion valve inlet end, expansion valve outlet end and the mixed export end C of injector Parallel connection, is divided into two-way, a road to be connected with the second one-way valve inlet end after parallel connection, the arrival end of another Lu Yu tetra-check valve is connected.
The heat pump type air conditioning system of the present invention is when refrigeration mode: from the high-pressure refrigerant of compressor outlet outflow after oil eliminator, enter Enter the B port of four-way change-over valve, from the C port of four-way change-over valve flow out laggard enter cooling condensation in outdoor heat exchanger, cooling Condensed high-pressure refrigerant passes through the first check valve, is divided into two-way after sequentially passing through reservoir and device for drying and filtering, and a road flows through the One electromagnetic valve enters the A port of injector, as the pressurized working fluid of injector;One road flows through the second electromagnetic valve and enters expansion Reducing pressure by regulating flow in valve;After low-pressure, liquid refrigerant bottom low-pressure oil storage flows through the 3rd electromagnetic valve, by the high-pressure work in injector Fluid is pumped to the B port of injector, as low-pressure injection fluid;Pressurized working fluid and low-pressure injection fluid are in injector Expanding after being sufficiently mixed and become low pressure two phase refrigerant, low pressure two phase refrigerant flows out from the C port of injector, and from expansion valve After the low pressure refrigerant mixing that outlet is flowed out, flow through the second check valve and enter sweat cooling in indoor heat exchanger, from indoor heat exchange The cold-producing medium that device flows out enters the A port of four-way change-over valve, from the D port of four-way change-over valve flow out laggard enter in low-pressure oil storage, After gas-liquid separation, sucked by compressor, complete a kind of refrigeration cycle.
The effect of electromagnetic valve is to be controlled two parallel pathways, when being simply turned off the second electromagnetic valve being connected with expansion valve, the most singly Solely by injector, working fluid sent into sweat cooling in indoor heat exchanger;When being simply turned off the first electromagnetic valve of being connected with injector Time, now this system is conventional heat pump air conditioning system, and cold-producing medium enters room by flowing through the second check valve after expansion valve reducing pressure by regulating flow Evaporation in the heat exchanger of inner side;When the first electromagnetic valve and the second electromagnetic valve are opened simultaneously, cold-producing medium is made by injector and expansion valve jointly With, thus realize the conservative control to refrigerant flow, and improve systematic entirety.
The heat pump type air conditioning system of the present invention is when heating mode: from the high-pressure refrigerant of compressor outlet outflow after oil eliminator, Enter the B port of four-way change-over valve, from the A port of four-way change-over valve flow out laggard enter cooling condensation in indoor heat exchanger, cold The most condensed high-pressure refrigerant is by, after check valve, flowing successively through reservoir and device for drying and filtering;Flow out from device for drying and filtering outlet Cold-producing medium be divided into two-way, lead up to first electromagnetic valve flow into injector A port, as the pressurized working fluid of injector; Second electromagnetic valve of separately leading up to flows to reducing pressure by regulating flow in expansion valve;Low-pressure, liquid refrigerant bottom low-pressure oil storage flows through the 3rd electricity After magnet valve, it is pumped to the B port of injector by the pressurized working fluid in injector, as low-pressure injection fluid;High-pressure work Fluid and low-pressure injection fluid expand after being sufficiently mixed in injector and become low pressure two phase refrigerant, and low pressure two phase refrigerant is from injection The C port of device flows out, and after mixing with the low pressure refrigerant flowed out from expansion valve outlet, flows through the 4th check valve entrance outside and changes Heat absorption evaporation in hot device;From the C port of the cold-producing medium entrance four-way change-over valve that outdoor heat exchanger outlet is flowed out, commutate from four-way The D port of valve exits in low-pressure oil storage, after gas-liquid separation, is sucked by compressor, completes one and heats circulation.
The effect of electromagnetic valve is to be controlled two parallel pathways, when being simply turned off the second electromagnetic valve being connected with expansion valve, the most singly Solely by injector, working fluid sent into sweat cooling in outdoor heat exchanger;When being simply turned off the first electromagnetic valve of being connected with injector Time, this system is conventional heat pump air conditioning system, and cold-producing medium enters outside by flowing through the 4th check valve after expansion valve reducing pressure by regulating flow Evaporation in heat exchanger;When the first electromagnetic valve and the second electromagnetic valve are opened simultaneously, injector and expansion valve jointly to cold-producing medium effect, Thus realize the conservative control to refrigerant flow, and improve systematic entirety.
Assembly of the invention is on the basis of the conventional incremental recirculating technique of heat exchanger injection, and injector is in parallel with expansion valve, altogether With realizing the reducing pressure by regulating flow process to system refrigerant and the incremental process recycling of heat exchanger.Prior art is carried out only with injector During reducing pressure by regulating flow, whole system can not carry out the regulation of sub-load, can only run under design conditions, and operating condition is narrow;And The present invention is on the basis of using injector and expansion valve, by controlling the valve size of expansion valve, it is possible to achieve system loading exists Regulate in the range of 0-100%, user's regulatory demand to heat pump type air conditioning system sub-load can be met.
Accompanying drawing explanation
Fig. 1 is the main-process stream schematic diagram of injection incremental type heat pump type air conditioning system;
Fig. 2 is injection incremental type heat pump type air conditioning system cooling flow schematic diagram;
Fig. 3 is that injection incremental type heat pump type air conditioning system heats schematic flow sheet.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
Apparatus of the present invention refrigeration mode is as shown in Figure 2: after the high-pressure refrigerant flowed out from compressor 1 flows through oil eliminator 2, pass through B, C port of four-way change-over valve 3, enters cooling condensation in outdoor heat exchanger 4, cools down condensed high-pressure refrigerant and pass through Being divided into two-way after check valve 5, reservoir 6 and device for drying and filtering 7, electromagnetic valve 8 of leading up to flows to injector high-pressure work entrance End A, as the pressurized working fluid of injector;Electromagnetic valve 10 of separately leading up to flows to expansion valve 11 arrival end, at expansion valve 11 Interior reducing pressure by regulating flow.Low-pressure liquid bottom low-pressure oil storage 14 is freezed by the high-pressure fluid flowing to injector 9 high-pressure work arrival end Agent is pumped to the B port of injector 9 through electromagnetic valve 15, as low-pressure injection fluid;The mixed export C of injector 9 flows out After low pressure two phase refrigerant mixes with the liquid low pressure refrigerant flowed out from expansion valve 11 outlet, flow into indoor through check valve 12 Heat absorption evaporation in heat exchanger 13.Cold-producing medium after vaporization is admitted to low-pressure oil storage 14 after A, D port of four-way change-over valve 3 In, after gas-liquid separation, low-pressure gaseous refrigerant is sucked by compressor 1, completes a kind of refrigeration cycle.
Apparatus of the present invention heating mode is as shown in Figure 3: the high-pressure refrigerant flowed out from compressor 1, after oil eliminator 2, passes through B, A port of four-way change-over valve 3, enters cooling condensation in indoor heat exchanger 13, and cooled condensed high-pressure refrigerant depends on Secondary by being divided into two-way after check valve 16, reservoir 6, device for drying and filtering 7.One road flows through electromagnetic valve 8 and enters the height of injector 9 Pressure working inlet end A, as the pressurized working fluid of injector 9;Another road cold-producing medium enters expansion valve after flowing through electromagnetic valve 10 The arrival end of 11, reducing pressure by regulating flow in expansion valve 11.Flow to the high-pressure fluid of injector 9 high-pressure work arrival end by low pressure receiver Low-pressure, liquid refrigerant bottom device 14 is pumped to the B port of injector 9 through electromagnetic valve 15, as low-pressure injection fluid;Injection After the low pressure two phase refrigerant that the mixed export C of device 9 flows out mixes with the liquid low pressure refrigerant flowed out from expansion valve 11 outlet, Heat absorption evaporation in check valve 17 flows into outdoor heat exchanger 4.Cold-producing medium after vaporization is through C, D port of four-way change-over valve 3 After be admitted in low-pressure oil storage 14, after gas-liquid separation, low-pressure gaseous refrigerant is sucked by compressor 1, completes one and heats Circulation.

Claims (3)

1. injection incremental type heat pump type air conditioning system, it is characterised in that including: compressor (1), oil eliminator (2), four-way Reversal valve (3), outdoor heat exchanger (4), the first check valve (5), reservoir (6), device for drying and filtering (7), the first electricity Magnet valve (8), injector (9), the second electromagnetic valve (10), expansion valve (11), the second check valve (12), indoor heat exchanger (13), low-pressure oil storage (14), the 3rd electromagnetic valve (15), the 3rd check valve (16) and the 4th check valve (17);
The outlet of described reservoir (6) is connected with the entrance of device for drying and filtering (7);The outlet of device for drying and filtering (7) is divided into two Road, a road is connected with the entrance of the first electromagnetic valve (8), and another road is connected with the entrance of the second electromagnetic valve (10);Described electromagnetism The outlet of valve (8) is connected with the high-pressure work arrival end A of injector (9), the low-pressure injection arrival end B of injector (9) with The port of export of the 3rd electromagnetic valve (15) is connected, the arrival end of the 3rd electromagnetic valve (15) and the outlet at bottom of low-pressure oil storage (14) End is connected;The port of export of described second electromagnetic valve (10) is connected with expansion valve (11) arrival end, expansion valve (11) port of export with The mixed export end C of injector (9) is in parallel, is divided into two-way, a road to be connected with the second check valve (12) arrival end after parallel connection, The arrival end of another Lu Yu tetra-check valve (17) is connected.
2. utilize the operational approach of injection as claimed in claim 1 incremental type heat pump type air conditioning system, it is characterised in that heat pump air conditioner The refrigeration mode of system is: from the high-pressure refrigerant of compressor (1) outlet outflow after oil eliminator (2), enter four-way commutation The B port of valve (3), from the C port of four-way change-over valve (3) flow out laggard enter in outdoor heat exchanger (4) cooling condense, Cool down condensed high-pressure refrigerant and pass through the first check valve (5), after sequentially passing through reservoir (6) and device for drying and filtering (7) Being divided into two-way, a road flows through the first electromagnetic valve (8) and enters the A port of injector (9), as the high pressure work of injector (9) Make fluid;One road flows through the second electromagnetic valve (10) and enters expansion valve (11) interior reducing pressure by regulating flow;Low-pressure oil storage (14) bottom After low-pressure, liquid refrigerant flows through the 3rd electromagnetic valve (15), it is pumped to injector (9) by the pressurized working fluid in injector (9) B port, as low-pressure injection fluid;Pressurized working fluid and low-pressure injection fluid are swollen after being sufficiently mixed in injector (9) The swollen low pressure two phase refrigerant that becomes, low pressure two phase refrigerant flows out from the C port of injector (9), goes out with from expansion valve (11) After the low pressure refrigerant mixing that mouth flows out, flow through the second check valve (12) and enter indoor heat exchanger (13) interior sweat cooling, from The cold-producing medium that indoor heat exchanger (13) flows out enters the A port of four-way change-over valve (3), from the D of four-way change-over valve (3) Port flow out laggard enter in low-pressure oil storage (14), after gas-liquid separation, sucked by compressor (1), complete a refrigeration Circulation.
3. utilize the operational approach of injection as claimed in claim 1 incremental type heat pump type air conditioning system, it is characterised in that heat pump air conditioner The heating mode of system is: from the high-pressure refrigerant of compressor (1) outlet outflow after oil eliminator (2), enters four-way and changes To the B port of valve (3), from the A port of four-way change-over valve (3) flow out laggard enter in indoor heat exchanger (13) cooling cold Solidifying, cool down condensed high-pressure refrigerant by, after check valve (16), flowing successively through reservoir (6) and device for drying and filtering (7); The cold-producing medium flowed out from device for drying and filtering (7) outlet is divided into two-way, and the first electromagnetic valve (8) of leading up to flows into injector (9) A port, as the pressurized working fluid of injector (9);The second electromagnetic valve (10) of separately leading up to flows to expansion valve (11) Interior reducing pressure by regulating flow;After the low-pressure, liquid refrigerant of low-pressure oil storage (14) bottom flows through the 3rd electromagnetic valve (15), by injector (9) Interior pressurized working fluid is pumped to the B port of injector (9), as low-pressure injection fluid;Pressurized working fluid and low pressure are drawn Jet body expands after being sufficiently mixed in injector (9) and becomes low pressure two phase refrigerant, and low pressure two phase refrigerant is from injector (9) C port flow out, with from expansion valve (11) outlet flow out low pressure refrigerant mix after, flow through the 4th check valve (17) and enter Enter heat absorption evaporation in outdoor heat exchanger (4);The cold-producing medium flowed out from outdoor heat exchanger (4) outlet enters four-way change-over valve (3) C port, exit in low-pressure oil storage (14) from the D port of four-way change-over valve (3), after gas-liquid separation, quilt Compressor (1) sucks, and completes one and heats circulation.
CN201610224665.XA 2016-04-12 2016-04-12 Ejecting flow-increasing type heat pump air conditioner system and operation method thereof Pending CN105841398A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109760485A (en) * 2018-12-29 2019-05-17 西安交通大学 It is a kind of with refrigerating/heating/boosting battery packet heat sinking function carbon dioxide system
CN112361638A (en) * 2019-07-25 2021-02-12 青岛海尔空调电子有限公司 Air conditioning system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101135505A (en) * 2007-09-25 2008-03-05 西安交通大学 Vapour compressing refrigeration system including injector
CN203132193U (en) * 2013-01-07 2013-08-14 南京五洲制冷集团有限公司 Falling film type threaded rod water cooling unit
CN204787413U (en) * 2015-05-22 2015-11-18 南京五洲制冷集团有限公司 Slab evaporation -condensation formula hot and cold water unit
US9261295B1 (en) * 2012-03-26 2016-02-16 Ball Aerospace & Technologies Corp. Hybrid liquid-hydrogen and helium cryocooler systems and methods

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101135505A (en) * 2007-09-25 2008-03-05 西安交通大学 Vapour compressing refrigeration system including injector
US9261295B1 (en) * 2012-03-26 2016-02-16 Ball Aerospace & Technologies Corp. Hybrid liquid-hydrogen and helium cryocooler systems and methods
CN203132193U (en) * 2013-01-07 2013-08-14 南京五洲制冷集团有限公司 Falling film type threaded rod water cooling unit
CN204787413U (en) * 2015-05-22 2015-11-18 南京五洲制冷集团有限公司 Slab evaporation -condensation formula hot and cold water unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109760485A (en) * 2018-12-29 2019-05-17 西安交通大学 It is a kind of with refrigerating/heating/boosting battery packet heat sinking function carbon dioxide system
CN112361638A (en) * 2019-07-25 2021-02-12 青岛海尔空调电子有限公司 Air conditioning system
CN112361638B (en) * 2019-07-25 2021-11-26 青岛海尔空调电子有限公司 Air conditioning system

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