CN109282542A - A kind of defrosting device, heat pump unit and control method - Google Patents

A kind of defrosting device, heat pump unit and control method Download PDF

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Publication number
CN109282542A
CN109282542A CN201811126684.4A CN201811126684A CN109282542A CN 109282542 A CN109282542 A CN 109282542A CN 201811126684 A CN201811126684 A CN 201811126684A CN 109282542 A CN109282542 A CN 109282542A
Authority
CN
China
Prior art keywords
defrost
branch
heating
valve
defrosting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811126684.4A
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Chinese (zh)
Inventor
李磊
曾慧
汤雁翔
邹先平
陈志虎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201811126684.4A priority Critical patent/CN109282542A/en
Publication of CN109282542A publication Critical patent/CN109282542A/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
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • F25B47/022Defrosting cycles hot gas defrosting
    • 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
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control 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
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • 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
    • F25B2347/00Details for preventing or removing deposits or corrosion
    • F25B2347/02Details of defrosting cycles
    • 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
    • F25B2400/00General 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
    • F25B2400/04Refrigeration circuit bypassing means
    • F25B2400/0401Refrigeration circuit bypassing means for the compressor

Abstract

The invention discloses a kind of defrosting device, heat pump unit and control methods, defrosting device includes: compressor, defrost heat exchanging part and separator, the refrigerant of compressor discharge can enter separator from defrost branch in parallel and heating branch, defrost heat exchanging part is connected in defrost branch, and the gaseous coolant in separator sends compressor back to.The present invention can effectively improve the defrost efficiency of heat pump unit.

Description

A kind of defrosting device, heat pump unit and control method
Technical field
The present invention relates to technical field of heat pumps more particularly to a kind of defrosting devices, heat pump unit and control method.
Background technique
The main application scenarios of heat pump unit are warmed oneself for winter homes and offices, by compressor, evaporator, cold Condenser and throttling set composition.For the working principle of heat pump unit as refrigeration air-conditioner, maximum difference is exactly that the outer machine of heat pump is Evaporator, interior machine are condenser, and the refrigerant in indoor heat exchanger is liquid heat release by gas transition in the process of running, to give Indoor heating.Due to the use environment of heat pump, outdoor heat exchanger works at a lower temperature, while the refrigerant gas in evaporator Change heat absorption, causes outdoor heat exchanger surface temperature generally below freezing.Vapor in air is in outdoor heat exchanger surface liquid Change or sublimate, so as to cause the frosting of outdoor heat exchanger surface, the frosting of large area can hinder evaporator fin to exchange heat, and influence heat The normal operation of pump assembly.
Traditional defrost technology is to change the operating path of refrigerant in systems by control four-way valve, so that outdoor heat exchange Device is changed into condenser, and indoor heat exchanger is changed into evaporator, against the cooling medium liquefaction heat release in outdoor heat exchanger, melts surface Frosting.At this time in order not to excessively influence indoor comfort, general control logic is the blower for closing indoor unit, prevents interior For the excessive forced convertion of the cooling capacity of heat exchanger to interior, this defrost process can make indoor user experience the cold of interior machine Wind, its comfort for using of extreme influence.
It is special for the invention of CN107388624A to have occurred the defrosting device with bypass, such as publication No. in the prior art Benefit draws a branch from compressor outlet, the gas of high temperature and pressure is introduced directly into outdoor heat exchanger and carries out defrost, Refrigerant in outdoor heat exchanger enters compressor using gas-liquid separator, although this frost-removal structure can be accomplished not influence room Comfort inside, but the outlet pressures of outdoor heat exchanger are smaller, and the refrigerant temperature in outdoor heat exchanger is lower, and defrost efficiency is not It is high.
Therefore, how to design a kind of defrosting device of raising defrost efficiency is industry technical problem urgently to be resolved.
Summary of the invention
In order to solve to exist in the prior art the low defect of defrost efficiency, the present invention proposes a kind of defrosting device, heat pump machine Group and control method.
The technical solution adopted by the present invention is that designing a kind of defrosting device, comprising: compressor, defrost heat exchanging part and separation The refrigerant of device, compressor discharge can enter separator, defrost heat exchanging part from the defrost branch and heating branch being arranged in parallel It is connected in defrost branch, the gaseous coolant in separator sends compressor back to.
Preferably, the defrost valve for switching its on off operating mode is equipped in defrost branch.
Preferably, the heating valve for being equipped in branch and switching its on off operating mode is heated.
Preferably, it heats in branch and is in series with throttling set.
Preferably, throttling set is capillary.
Preferably, defrosting device further include: the control assembly being connect with heating valve.
In a preferred embodiment, control assembly includes: to detect the pressure sensor and and pressure of separator internal pressure The control module of sensor connection, control module open heating valve when the detected value of pressure sensor reaches preset pressure value. Preferably, pressure sensor is mounted on the top position in separator.
In possible embodiments, control assembly is connect with the defrost valve of switching defrost branch on off operating mode, control assembly packet Include: timer and the control module connecting with timer, control module open simultaneously defrost valve and timer, and in timer Timing time opens heating valve when reaching preset time.
Preferably, heating valve and defrost valve are all made of solenoid valve.
Preferably, separator uses gas-liquid separator or fluid reservoir.
Preferably, the exhaust outlet of compressor is in series with oil eliminator, and defrost branch and heating branch are both connected to oily separation In the outlet of device.
Preferably, defrost heat exchanging part includes at least one outdoor heat exchanger.
The invention also provides a kind of heat pump units with above-mentioned defrosting device.
Wherein, heat pump unit further includes indoor heat exchanging part, and the refrigerant of compressor discharge can enter separation dress from heating branch It sets, indoor heat exchanging part and defrost heat exchanging part are connected in heating branch, and defrost heat exchange part is in the outlet side of indoor heat exchanging part.
Preferably, the heating valve for being equipped in branch and switching its on off operating mode is heated.
Preferably, heating valve connects control assembly.
Preferably, heating valve include: the first heating valve of the inlet side set on indoor heat exchanging part, be set to indoor heat exchanging part and The second heating valve between defrost heat exchanging part.
Preferably, the first heating valve and the second heating valve use solenoid valve.
Heat pump unit further includes four-way valve, and the refrigerant of compressor discharge by entering the room heat exchange in four-way valve all the way Portion, the refrigerant in defrost heat exchanging part enter separator by the another way in four-way valve.
Preferably, indoor heat exchanging part includes multiple indoor heat exchangers being arranged in parallel.
The invention also provides a kind of control methods of above-mentioned heat pump unit, when heat pump unit is to indoor heating, heating Branch is connected, defrost branch disconnects, heating branch disconnects;When heat pump unit defrost, defrost branch is connected, heats finger delays It connects, heating branch disconnects.
There are two types of control modes for the connection of heating finger delays: the first is to heat pressure of the branch inside separator to reach It is connected when to preset pressure value.Second is heating branch connection when the turn-on time of defrost branch reaching preset time.
Compared with prior art, present invention employs double branches to carry out defrost, and a part of refrigerant of compressor discharge is from change White branch enters the heating defrost of defrost heat exchanging part, and refrigerant is converted into the liquid of low pressure or gas-liquid mixed enters separator, another Part refrigerant directly enters separator from heating branch, with the liquid refrigerants heat exchange in separator, increases separator Internal pressure, makes the outlet pressure of defrost heat exchanging part become larger, and then increase the temperature of refrigerant in defrost heat exchanging part, mentions significantly High defrost efficiency.
Detailed description of the invention
Below with reference to embodiment and attached drawing, the present invention is described in detail, in which:
Refrigerant path schematic diagram when Fig. 1 is heat pump unit defrost in the present invention;
Fig. 2 is refrigerant path schematic diagram when heat pump unit heats in the present invention.
Specific embodiment
As shown in Figure 1, defrosting device proposed by the present invention, comprising: compressor 1, defrost heat exchanging part 2 and separator 3, pressure The exhaust outlet of contracting machine 1 is equipped with the heating branch and defrost branch being arranged in parallel, and defrost heat exchanging part 2 is connected in defrost branch, changes White heat exchanging part 2 includes at least one outdoor heat exchanger.The exhaust outlet of compressor 1 is in series with oil eliminator 4, defrost branch and heating Branch is both connected in the outlet of oil eliminator 4, to prevent lubricating oil from entering defrost branch and heating branch, influences heat transfer effect Fruit.
The refrigerant of the exhaust outlet discharge high temperature and pressure of compressor 1, a part of refrigerant pass through defrost heat exchanging part from defrost branch 2, its defrost is made by the high temperature of refrigerant, the liquid or gas-liquid mixed that refrigerant cooling is converted into low pressure enter in separator 3, separately A part of refrigerant directly enters in separator 3 from heating branch, and the liquid refrigerants heat in high temperature refrigerant and separator 3 is handed over It changes, the pressure inside separator 3 can be increased in this way, since the outlet of defrost heat exchanging part 2 and the entrance of separator 3 connect It is logical, equivalent to increase the saturation pressure that defrost heat exchanging part 2 exports, effectively increase the temperature of refrigerant in defrost heat exchanging part 2, Improve defrost efficiency.Gaseous coolant in separator 3 sends the air entry of compressor 1, separator 3 and heating branch back to again It is arranged liquid refrigerants can not only gasify and increases the outlet pressure of defrost heat exchanging part 2, but also 1 absorbing gas belt liquid of compressor can be prevented, Gas-liquid separator or fluid reservoir can be used in effective protection compressor 1, separator 3.
Preferably, it heats in branch and is in series with throttling set 5, since the refrigerant pressure of 1 exhaust outlet of compressor discharge is higher, When 1 exhaust outlet of compressor is directly communicated to separator 3 by heating branch, the cold medium flux for heating branch and defrost branch exists Very big difference, therefore using the dropping voltage characteristic of throttling set 5, the circulating pressure of active balance defrost branch and heating branch makes Refrigerant shunting to defrost branch and heating branch more evenly, capillary can be used in throttling set 5.
Further, it is equipped with the defrost valve 6 for switching its on off operating mode in defrost branch, heats logical equipped with it is switched in branch The heating valve 7 of disconnected state, heating valve 7 and defrost valve 6 connect control assembly, adjust heating valve 7 and defrost valve 6 by control assembly Switch, the opening ways of heating valve 7 can there are many, two embodiments are given below.
In a preferred embodiment, control assembly includes: pressure sensor and the control module that connect with pressure sensor, pressure Force snesor detects the pressure inside separator 3, and control module is when the detected value of pressure sensor reaches preset pressure value Heating valve 7 is opened, in order to keep the testing result of pressure sensor more acurrate, pressure sensor is preferably mounted in separator 3 Top position.
In a possible embodiments, control assembly includes: timer and the control module that connect with timer, control module Timer is opened while opening defrost valve 6, timer carries out timing to the on-state of defrost valve 6, when the timing of timer Time opens heating valve 7 when reaching preset time.
As shown in Fig. 2, the invention also provides a kind of heat pump units with above-mentioned defrosting device.
Wherein, heat pump unit further includes indoor heat exchanging part 8, and in a preferred embodiment, indoor heat exchanging part 8 includes multiple parallel connections The indoor heat exchanger of setting, the exhaust outlet of compressor 1 are additionally provided with the heating branch with defrost branch and heating branch circuit parallel connection setting, Heating branch is connected in the outlet of oil eliminator 4, and indoor heat exchanging part 8 and defrost heat exchanging part 2 are connected in heating branch, is changed White heat exchanging part 2 is located at the outlet side of indoor heat exchanging part 8, the refrigerant of the exhaust outlet discharge high temperature and pressure of compressor 1, refrigerant pass through according to Secondary interior heat exchanging part 8 and defrost heat exchanging part 2 enter back into separator 3.
Preferably, the heating valve for being equipped in branch and switching its on off operating mode is heated, heating valve connects control assembly, passes through control The switch of component adjustment heating valve processed.In a preferred embodiment, heating valve includes: the of the inlet side set on indoor heat exchanging part 8 One heating valve 9, the second heating valve 10 between indoor heat exchanging part 8 and defrost heat exchanging part 2, when heating branch disconnects, simultaneously The first heating valve 9 and the second heating valve 10 are closed, room will not be flowed to by the refrigerant that the first heating valve 9 guarantees that compressor 1 is discharged Interior heat exchanging part 8 guarantees that the refrigerant in defrost heat exchanging part 2 will not flow to indoor heat exchanging part 8 by the second heating valve 10, interior is changed Hot portion 8 is effectively isolated with defrost branch, and indoor environment is unaffected during defrost.
In preferred embodiment, heat pump unit further include: four-way valve 11, the refrigerant that compressor 1 is discharged is by four-way valve 11 Enter the room heat exchanging part 8 all the way, the refrigerant in defrost heat exchanging part 2 enters separator 3 by the another way in four-way valve 11, Heat pump unit carries out heating or defrost by the switching of defrost valve etc., and four-way valve 11 keeps existing connection without changing State, defrost valve 6, heating valve 7, first heat valve 9 and the second heating valve 10 is all made of solenoid valve.
The control method of heat pump unit is as follows.As shown in Fig. 2, control assembly is opened when heat pump unit is to indoor heating First heating valve 9 and the second heating valve 10 close defrost valve 6 and heating valve 7, heat branch connection, defrost branch at this time and add Hot branch disconnects, the running route of refrigerant be compressor 1 exhaust outlet, oil eliminator 4, four-way valve 11, first heat valve 9, Indoor heat exchanging part 8, second heats the air entry of valve 10, defrost heat exchanging part 2, four-way valve 11, separator 3, compressor 1.Such as Fig. 1 Shown, when heat pump unit defrost, control assembly closes the first heating valve 9 and the second heating valve 10, opens defrost valve 6, at this time Branch disconnection, the connection of defrost branch are heated, the refrigerant for the high temperature and pressure being discharged from compressor 1 is directly entered defrost heat exchanging part 2 Defrost, refrigerant cooling is converted into the liquid of low pressure or gas-liquid mixed enters separator 3, after control assembly postpones a period of time Heating valve 7 is opened again, branch is heated at this time and connects, and the high temperature and pressure refrigerant being discharged in compressor 1 is from defrost branch and heats branch Road respectively enters separator 3, and high temperature refrigerant is sent into separator heat exchange by heating branch, improves defrost efficiency.
There are two types of control modes for the connection of heating finger delays: the first is the pressure for heating branch inside separator 3 The specific structure of connection when reaching preset pressure value, control assembly is detailed in above preferred embodiment.Second is heating branch The connection when the turn-on time of defrost branch reaching preset time, the specific structure of control assembly are detailed in above-mentioned feasible implementation Example.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (27)

1. a kind of defrosting device, comprising: compressor (1), defrost heat exchanging part (2) and separator (3), which is characterized in that described The refrigerant of compressor (1) discharge can enter the separator (3) from the defrost branch and heating branch being arranged in parallel, describedization White heat exchanging part (2) is connected in the defrost branch, and the gaseous coolant in the separator (3) sends the compressor (1) back to.
2. defrosting device as described in claim 1, which is characterized in that be equipped in the defrost branch and switch its on off operating mode Defrost valve (6).
3. defrosting device as described in claim 1, which is characterized in that be equipped in the heating branch and switch its on off operating mode Heating valve (7).
4. defrosting device as described in claim 1, which is characterized in that be in series with throttling set (5) in the heating branch.
5. defrosting device as claimed in claim 4, which is characterized in that the throttling set (5) is capillary.
6. defrosting device as claimed in claim 3, which is characterized in that further include: the control group being connect with the heating valve (7) Part.
7. defrosting device as claimed in claim 6, which is characterized in that the control assembly includes: the detection separator (3) pressure sensor of internal pressure and the control module connecting with the pressure sensor, the control module is in the pressure The detected value of force snesor opens the heating valve (7) when reaching preset pressure value.
8. defrosting device as claimed in claim 7, which is characterized in that the pressure sensor is mounted on the separator (3) top position in.
9. defrosting device as claimed in claim 6, which is characterized in that the control assembly and the switching defrost branch on-off The defrost valve (6) of state connects.
10. defrosting device as claimed in claim 9, which is characterized in that the control assembly include: timer and with the meter When device connection control module, the control module opens simultaneously the defrost valve (6) and timer, and in the timer Timing time opens the heating valve (7) when reaching preset time.
11. defrosting device as claimed in claim 9, which is characterized in that the heating valve (7) and defrost valve (6) are all made of electricity Magnet valve.
12. defrosting device as described in claim 1, which is characterized in that the separator (3) uses gas-liquid separator or storage Flow container.
13. defrosting device as described in claim 1, which is characterized in that the exhaust outlet of the compressor (1) is in series with oily separation Device (4), the defrost branch and heating branch are both connected in the outlet of the oil eliminator (4).
14. defrosting device as described in claim 1, which is characterized in that the defrost heat exchanging part (2) includes that at least one is outdoor Heat exchanger.
15. a kind of band is just like the heat pump unit of any one of claim 1 to 14 defrosting device.
16. heat pump unit as claimed in claim 15, which is characterized in that further include indoor heat exchanging part (8), the compressor (1) refrigerant being discharged can enter the separator (3) from heating branch, the interior heat exchanging part (8) and defrost heat exchanging part (2) It is connected in the heating branch, the defrost heat exchanging part (2) is located at the outlet side of the indoor heat exchanging part (8).
17. heat pump unit as claimed in claim 16, which is characterized in that be equipped in the heating branch and switch its on off operating mode Heating valve.
18. heat pump unit as claimed in claim 17, which is characterized in that the heating valve connects control assembly.
19. heat pump unit as claimed in claim 17, which is characterized in that the heating valve includes: set on the indoor heat exchange First heating valve (9) of the inlet side in portion (8), the be set between the indoor heat exchanging part (8) and the defrost heat exchanging part (2) Two heatings valve (10).
20. heat pump unit as claimed in claim 19, which is characterized in that first heating valve (9) and the second heating valve (10) solenoid valve is used.
21. heat pump unit as claimed in claim 16, which is characterized in that it further include four-way valve (11), compressor (1) row Refrigerant out by entering the indoor heat exchanging part (8) in the four-way valve (11) all the way, in the defrost heat exchanging part (2) Refrigerant enters the separator (3) by the another way in the four-way valve (11).
22. heat pump unit as claimed in claim 16, which is characterized in that the interior heat exchanging part (8) includes that multiple parallel connections are set The indoor heat exchanger set.
23. a kind of control method of heat pump unit as claimed in claim 16, which is characterized in that when the heat pump unit is to interior When heating, the heating branch is connected, defrost branch disconnects;When the heat pump unit defrost, the defrost branch is connected, is made Hot branch disconnects.
24. control method as claimed in claim 23, which is characterized in that when the heating branch is connected, the heating branch Road disconnects.
25. control method as claimed in claim 23, which is characterized in that when the defrost branch is connected, the heating branch Road delay is connected.
26. control method as claimed in claim 25, which is characterized in that the heating branch is inside the separator Connection when pressure reaches preset pressure value.
27. control method as claimed in claim 25, which is characterized in that connection of the heating branch in the defrost branch Connection when time reaches preset time.
CN201811126684.4A 2018-09-26 2018-09-26 A kind of defrosting device, heat pump unit and control method Pending CN109282542A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811126684.4A CN109282542A (en) 2018-09-26 2018-09-26 A kind of defrosting device, heat pump unit and control method

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Application Number Priority Date Filing Date Title
CN201811126684.4A CN109282542A (en) 2018-09-26 2018-09-26 A kind of defrosting device, heat pump unit and control method

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CN109282542A true CN109282542A (en) 2019-01-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109974325A (en) * 2019-03-07 2019-07-05 海信家电集团股份有限公司 A kind of air-conditioning system and its control method and device, air conditioner
CN111174457A (en) * 2020-01-06 2020-05-19 珠海格力电器股份有限公司 Air conditioning system capable of preventing operation with liquid and control method

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CN105723168A (en) * 2013-10-24 2016-06-29 三菱电机株式会社 Air conditioner
CN206861943U (en) * 2017-06-05 2018-01-09 Tcl空调器(中山)有限公司 Hot gas bypass defrosting structure, air-conditioner outdoor unit and air conditioner
CN108006926A (en) * 2017-12-07 2018-05-08 广东美的暖通设备有限公司 Air conditioner and its control method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006101567A1 (en) * 2005-03-18 2006-09-28 Carrier Commercial Refrigeration, Inc. Bottle cooler defroster and methods
CN101344340A (en) * 2007-07-10 2009-01-14 松下电器产业株式会社 Air conditioner
CN201828085U (en) * 2010-09-03 2011-05-11 广东芬尼克兹节能设备有限公司 Heat pump with intelligent defrosting function
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CN206861943U (en) * 2017-06-05 2018-01-09 Tcl空调器(中山)有限公司 Hot gas bypass defrosting structure, air-conditioner outdoor unit and air conditioner
CN108006926A (en) * 2017-12-07 2018-05-08 广东美的暖通设备有限公司 Air conditioner and its control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109974325A (en) * 2019-03-07 2019-07-05 海信家电集团股份有限公司 A kind of air-conditioning system and its control method and device, air conditioner
CN111174457A (en) * 2020-01-06 2020-05-19 珠海格力电器股份有限公司 Air conditioning system capable of preventing operation with liquid and control method

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