CN109612026A - Outdoor unit, air conditioner and its Defrost method - Google Patents

Outdoor unit, air conditioner and its Defrost method Download PDF

Info

Publication number
CN109612026A
CN109612026A CN201811399712.XA CN201811399712A CN109612026A CN 109612026 A CN109612026 A CN 109612026A CN 201811399712 A CN201811399712 A CN 201811399712A CN 109612026 A CN109612026 A CN 109612026A
Authority
CN
China
Prior art keywords
heat exchanger
outdoor heat
port
outdoor
control valve
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
CN201811399712.XA
Other languages
Chinese (zh)
Inventor
史传民
侯志辉
赵希枫
刘东来
许阳阳
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.)
Hisense Shandong Air Conditioning Co Ltd
Original Assignee
Hisense Shandong Air Conditioning Co Ltd
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 Hisense Shandong Air Conditioning Co Ltd filed Critical Hisense Shandong Air Conditioning Co Ltd
Priority to CN201811399712.XA priority Critical patent/CN109612026A/en
Publication of CN109612026A publication Critical patent/CN109612026A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41Defrosting; Preventing freezing
    • F24F11/42Defrosting; Preventing freezing of outdoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/40Vibration or noise prevention at outdoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • 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
    • F25B13/00Compression machines, plants or systems, with reversible cycle
    • 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
    • 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
    • F25B2500/00Problems to be solved
    • F25B2500/28Means for preventing liquid refrigerant entering into the compressor

Abstract

The present invention discloses a kind of outdoor unit, air conditioner and its Defrost method, is related to air-conditioning technical field, invents to improve defrosting effect.The outdoor unit includes compressor, four-way reversing valve, first throttling device, main control valve and sub-control valve, the first port of four-way reversing valve and the outlet of compressor, the third port of four-way reversing valve is connected to the entrance of the compressor, the first port of outdoor heat exchanger is connected to the second port of the four-way reversing valve, first throttling device is mounted at the second port of outdoor heat exchanger, main control valve is mounted on the pipeline that the first port of outdoor heat exchanger is connected to the second port of four-way reversing valve, sub-control valve is mounted on the pipeline of the first port of outdoor heat exchanger and the outlet of compressor, or on the pipeline that is connected to the 4th port of four-way reversing valve of the first port of outdoor heat exchanger.Defrost method of the present invention is used to improve defrosting and the heating effect of air conditioner.

Description

Outdoor unit, air conditioner and its Defrost method
Technical field
The present invention relates to air-conditioning technical field more particularly to a kind of outdoor units, air conditioner and its Defrost method.
Background technique
Air conditioner long-time heating operation, inevitably has frost layer on the surface of outdoor heat exchanger, makes air conditioner Heat exchange amount decaying, influence the heating load to indoor room.What is generallyd use currently on the market is four-way valve commutation defrosting or heat Gas bypass defrosting, four-way valve commutation defrosting are that the temperature detected by outdoor temperature sensor is compared with defrosting decision condition It is right, defrosting, compressor shutdown or frequency reducing are entered when reaching defrosting condition, when meeting four-way valve commutation condition, four-way valve It commutates, then compressor start or raising frequency, system carries out refrigerating operaton at this time, by high temperature and high pressure gas to outdoor heat exchange Device carries out defrost and, so blower is not opened, cold wind is avoided to be blown into interior because indoor heat exchanger is low-temperature space at this time, influences indoor ring Border temperature.It is in the prior art mostly to reduce defrosting time to the greatest extent, reduction indoor environment temperature fluctuating change as far as possible.From user angle Degree considers that in heating operation, preferring to air conditioner endlessly can provide heat for room, and interior is made to be able to maintain that one A stable temperature value, ensures the comfort level in room.
In the prior art, a kind of outdoor heat exchange device and its Defrost method are disclosed, as shown in Figure 1, the outdoor heat exchange fills Setting 10 includes total escape pipe A, total inlet tube B, multiple outdoor heat exchangers 11, multiple first solenoid valves 12 and multiple second solenoid valves 13;The escape pipe of the outdoor heat exchanger 11 is separately connected one end and its second electromagnetism of correspondence of its corresponding first solenoid valve 12 The other end of one end of valve 13, first solenoid valve 12 connects total escape pipe A, the other end of the second solenoid valve 13 The exhaust pipe 41 of connect compressor 40.The Defrost method is the following steps are included: outdoor temperature sensor detects corresponding outdoor heat exchange Device meets defrosting condition, is closed by its corresponding first solenoid valve 12, second solenoid valve 13 is opened, the exhaust pipe of compressor 40 High temperature and high pressure gaseous refrigerant in 41 is input to the outdoor heat exchanger through the corresponding second solenoid valve 13 of outdoor heat exchanger 11 11 escape pipe enters in the outdoor heat exchanger 11 from the escape pipe, and the gaseous refrigerant of high temperature and pressure is in the outdoor heat exchange Heat release is carried out in device 11, is defrosted to its outdoor heat exchanger 11.But the Defrost method has the drawback that: 1. referring to Fig. 5 And Fig. 6, consider from system pressure-enthalpy chart: during defrosting, the condensed 4 ' liquid refrigerants of heat exchanger and interior in defrosting mode 5 gas-liquid mixed state refrigerants mixing after heat exchanger throttling, refrigerant mass dryness fraction increases after mixing, and temperature increases, and pressure increases, and enthalpy increases Greatly, therefore heating capacity is reduced, and heating effect is poor during defrosting;2. from the aspect of noise: the first solenoid valve is closed, second solenoid valve When unlatching, into the outdoor heat exchanger high temperature liquid refrigerant be previously entered the low temperature gas-liquid mixed of the outdoor heat exchanger Refrigerant is easily formed in the outdoor heat exchanger and is liquidated, and causes turbulent flow, easily formation noise;3. being examined from compressor operating reliability Consider: after medium temperature liquid refrigerant enters the outdoor heat exchanger of heating mode after mixing with low temperature gas-liquid mixed refrigerant, because of no section Device is flowed, the heat exchanger degree of superheat is unable to control, compressor is easily led to and returns liquid, influence compressor reliability.
Summary of the invention
The embodiment provides a kind of outdoor unit, air conditioner and its Defrost methods, before being defrosted, wait remove White indoor heat exchanger avoids high temperature liquid refrigerant when defrosting from liquidating to be formed with low temperature gas-liquid mixed refrigerant close to vacuum state Turbulent flow, and also ensured that entire outdoor unit has the suitable degree of superheat during defrosting, avoid refrigerant from being back to compressor It is interior.During defrosting, referring to figure 5 and figure 6, indoor heat exchanger flows out 4 liquid refrigerants and defrosting heat exchanger flows out 4 ' liquid refrigerants Mixing enters evaporator after first throttling device throttles and evaporates, meets heating system pressure-enthalpy chart process, during guaranteeing to defrost not Interruption heating, heating effect are good.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
A kind of outdoor unit, comprising: compressor, four-way reversing valve and at least two outdoor heat exchangers;The four-way commutation Valve has first port and the 4th state that port is connected and second port is connected with third port and first port and the The state that Two-port netwerk conducting and third port are connected with the 4th port, the first port of the four-way reversing valve and the compression The outlet of machine, the third port of the four-way reversing valve are connected to the entrance of the compressor, the outdoor heat exchanger First port is connected to the second port of the four-way reversing valve, the outdoor unit further include:
First throttling device, the first throttling device are mounted at the second port of the outdoor heat exchanger;
Main control valve, the main control valve be mounted on the outdoor heat exchanger first port and the four-way reversing valve On the pipeline of second port connection;
Sub-control valve, the sub-control valve are mounted on the first port of the outdoor heat exchanger and the outlet of the compressor On the pipeline of connection or pipeline that the first port of the outdoor heat exchanger is connected to the 4th port of the four-way reversing valve On.
Outdoor unit provided in an embodiment of the present invention, after closing first throttling device, after the first preset time, then Main control valve is closed, outdoor heat exchanger can be made close to vacuum state before being defrosted, prevented high temperature during defrosting Gaseous refrigerant is passed through outdoor heat exchanger, and liquidates with low temperature gas-liquid mixed refrigerant, forms turbulent flow, leads to outdoor heat exchanger Inside there is abnormal sound.
Another aspect of the present invention embodiment additionally provides a kind of air conditioner, comprising: outdoor unit and indoor units, the room Outer unit is outdoor unit described above, wherein the 4th of the first port of the indoor units and the four-way reversing valve Port connection, the second port of the indoor units are connected to the second port of the outdoor heat exchanger.
Air conditioner provided in an embodiment of the present invention, due to making the air conditioner pass through institute with outdoor unit described above The opening and closing for stating main control valve, sub-control valve changes the flow direction of refrigerant and the physical state of refrigerant, what is defrosted Meanwhile it still being able to heat interior, and prevent that the refrigerant of high-temperature gas is passed through outdoor heat exchange during defrosting It liquidates after device with low temperature gas-liquid mixed refrigerant, forms turbulent flow, avoid occurring abnormal sound in outdoor heat exchanger;Meanwhile passing through evaporation The throttling of first throttling device on the outdoor heat exchanger of device can also ensure the degree of superheat of outdoor heat exchanger, avoid liquid refrigeration Agent is back to the phenomenon that compressor.
Another aspect of the present invention embodiment additionally provides a kind of Defrost method of air conditioner, and the Defrost method includes:
The energized state when four-way reversing valve is in heating is controlled, according to defrosting preset condition, determines at least two Part outdoor heat exchanger in the outdoor heat exchanger is outdoor heat exchanger to be defrosted, remaining outdoor heat exchanger is evaporator;
It is described wait the first throttling device corresponding to the outdoor heat exchanger that defrosts to close each, to the first preset time Afterwards, the main control valve is turned off, makes the outdoor heat exchanger to be defrosted close to vacuum state;
It is described wait sub-control valve corresponding to the outdoor heat exchanger that defrosts and the first throttling device to open each, To defrost to the outdoor heat exchanger to be defrosted.
The Defrost method of air conditioner provided in an embodiment of the present invention, by closing the first preset time of first throttling device Afterwards, main control valve is turned off, is liquidated after preventing high temperature liquid refrigerant from entering with the low temperature liquid refrigerant previously having, is formed Noise;And the first throttling device on evaporator can not only carry out decrease temperature and pressure to the refrigerant after defrosting, it can also be real When control the degree of superheat, prevent refrigerant to be back in compressor.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the outdoor heat exchange device provided in the prior art;
Fig. 2 is a kind of structural schematic diagram of air conditioner provided in an embodiment of the present invention;
Fig. 3 is a kind of schematic illustration of the air conditioner provided in an embodiment of the present invention in defrosting;
Fig. 4 is a kind of flow diagram of the Defrost method of air conditioner provided in an embodiment of the present invention;
Fig. 5 be in this field air conditioner in operation heating mode and when carrying out defrosting operation, indoor heat exchanger and not into The system pressure-enthalpy chart of the outdoor heat exchanger composition of row defrosting operation;
Fig. 6 is that air conditioner is in operation heating mode and when carrying out defrosting operation in this field, the room in defrosting operation The system pressure-enthalpy chart of external heat exchanger and the outdoor heat exchanger composition for not carrying out defrosting operation.
Specific embodiment
Outdoor unit of the embodiment of the present invention, air conditioner and its Defrost method are described in detail with reference to the accompanying drawing.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ", The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Term " first ", " second " be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or Implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply Ground includes one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or It is more than two.
The embodiment of the invention provides a kind of outdoor units, and referring to Fig. 2, the outdoor unit 1 includes: compressor 102, four Logical reversal valve 103, at least two outdoor heat exchangers 104, first throttling device 105, main control valve 106 and sub-control valve 107;Four The logical tool of reversal valve 103 there are four port, respectively first port 1., second port 2., third port 3. with the 4th port 4., four For the logical tool of reversal valve 103 there are two types of working condition, a kind of state is that 1. 4. first port is connected with the 4th port, and second port is 2. 3. be connected with third port, another state be first port be 1. 2. connected with second port, and third port 3. with the 4th end 4. mouth is connected.The first port of the four-way reversing valve 103 1. outlet with compressor 102, the third end of four-way reversing valve 103 3. being connected to the entrance of compressor 102,2. the first port of outdoor heat exchanger 104 connects with the second port of four-way reversing valve 103 Logical, first throttling device 105 is mounted at the second port of outdoor heat exchanger 104, and main control valve 106 is mounted on outdoor heat exchanger On 2. pipeline that 104 first port is connected to the second port of four-way reversing valve 103, sub-control valve 107 is mounted on outdoor and changes On the pipeline of the outlet of the first port and compressor 102 of hot device 104 or the first port and four of outdoor heat exchanger 104 On 4. pipeline that 4th port of logical reversal valve 103 is connected to.
It should be noted that the first port of outdoor heat exchanger 104 is air outlet when outdoor heat exchanger 104 heats, The second port of outdoor heat exchanger 104 is feed liquor port when outdoor heat exchanger 104 heats, similarly, the of outdoor heat exchanger 104 Single port is air inlet port when outdoor heat exchanger 104 freezes, and the second port of outdoor heat exchanger 104 is outdoor heat exchanger 104 Outlet end mouth when refrigeration;The outlet of compressor 102 is high pressure gaseous output port, and the entrance of compressor 102 is low temperature Low-pressure gaseous input port.
Main control valve 106 is used to control the conducting of outdoor heat exchanger 104 Yu four-way reversing valve 103.In operation heating mode When, main control valve 106 is opened, for refrigerant derived from outdoor heat exchanger 104 to be passed through four-way reversing valve 103;It is made in operation When cold mode, main control valve 106 is opened, for refrigerant derived from four-way reversing valve 103 to be passed through outdoor heat exchanger 104;Show Example, the main control valve 106 changes the flow direction of refrigerant by the opening and closing of control valve for solenoid electric valve.
Sub-control valve 107 is used to control the first port of outdoor heat exchanger 104 and the conducting of compressor 102, or for controlling The conducting of 4th port of 104 first port of outdoor heat exchanger processed and four-way reversing valve 103 4..Sub-control valve 107 is only needing Treating when defrosting outdoor heat exchanger is defrosted can just open, and high-temperature high-pressure gas refrigerant is passed through outdoor heat exchanger 104 It is interior;Exemplary, sub-control valve is solenoid valve, by controlling the opening and closing of solenoid valve, changes refrigerant flow direction.
When running heating mode, it is easy frosting compared with the outdoor heat exchanger 104 in low environment in temperature, works as outdoor heat exchange It when 104 frosting of device, needs to treat defrosting outdoor heat exchanger and carries out defrosting operation, defrost treating defrosting outdoor heat exchanger When, it closes wait main control valve 106 corresponding to the outdoor heat exchanger that defrosts, blocks wait the low-temp low-pressure derived from outdoor heat exchanger that defrosts Gas refrigerant is passed through in compressor 102, that is, stopped the heating mode of the outdoor heat exchanger to be defrosted, and is then turned on wait remove Sub-control valve 107 corresponding to white outdoor heat exchanger, high-temperature gas refrigerant derived from compressor 102 will be passed through room to be defrosted In external heat exchanger, released heat is condensed using high-temperature gas refrigerant and removes frost, complete the high-temperature gas refrigeration of defrosting Agent just will become medium temperature liquid refrigerant, medium temperature liquid refrigerant using the outdoor heat exchanger that do not defrost first throttling device 105 throttling becomes low-pressure gas-liquid mix refrigerant, and first throttling device 105 can not only corresponding to the outdoor heat exchanger that do not defrost It is enough that refrigerant is depressured, while also cooling down to refrigerant.Using the first throttling device 105 technology achieved Effect are as follows: (1) do not defrosted by the gas-liquid mixed state cold-producing medium entrance after the outdoor heat exchanger first throttling device 105 that do not defrost After outdoor heat exchanger 104, it is directly entered the outdoor heat exchanger 104 not defrosted compared to medium temperature gas-liquid mixed refrigerant, increases steaming It is poor with outdoor environment temperature to send out temperature, increases heat exchange energy, according to law of conservation of energy, just will increase the heat exchange of indoor units Energy, and then improve indoor heating effect;(2) first throttling device 105 can control the mistake of 104 second port of outdoor heat exchanger Temperature, and then entire outdoor unit is controlled with the suitable degree of superheat.
Exemplary, the first throttling device 105 includes electric expansion valve.
The liquid carried in gas derived from four-way reversing valve 103 in order to prevent enters compressor 102, the outdoor unit Further include: gas-liquid separator 101, gas-liquid separator 101 for will the liquid that be carried in gas derived from four-way reversing valve 103 into Row separation, one end of the gas-liquid separator 101 are connected to the entrance of the compressor 102, and the other end and the four-way commutate 3. the third port of valve 103 is connected to.
In some embodiments, the second port of multiple outdoor heat exchangers 104 is connected.For example, referring to Fig. 3, institute Stating outdoor heat exchanger 104 is three, respectively outdoor heat exchanger 1041, outdoor heat exchanger 1042 and outdoor heat exchanger 1043, and Outdoor heat exchanger 1041, outdoor heat exchanger 1042 are connected with the second port of outdoor heat exchanger 1043.
In some embodiments, the first port of multiple outdoor heat exchangers 104 is connected.For example, referring to Fig. 3, institute Stating outdoor heat exchanger 104 is three, respectively outdoor heat exchanger 1041, outdoor heat exchanger 1042 and outdoor heat exchanger 1043, and Outdoor heat exchanger 1041, outdoor heat exchanger 1042 are connected with the first port of outdoor heat exchanger 1043;Main control valve 106 is installed At the first port of outdoor heat exchanger 1041, outdoor heat exchanger 1042 and outdoor heat exchanger 1043.
The embodiment of the invention also provides a kind of air conditioners, and referring to Fig. 2, the air conditioner includes: outdoor unit 1 and interior Unit 2, the outdoor unit 1 are outdoor unit described above, wherein the first port of the indoor units 2 and described four 4. 4th port of logical reversal valve 103 is connected to, and the second of the second port of the indoor units 2 and the outdoor heat exchanger 104 Port connection.
Exemplary, the indoor units 2 include indoor heat exchanger 201, the first port of indoor heat exchanger 201 and described four 4. 4th port of logical reversal valve 103 is connected to, and the second of the second port of indoor heat exchanger 201 and the outdoor heat exchanger 104 Port connection.
It should be noted that the first port of indoor heat exchanger 201 is air inlet port when indoor heat exchanger 201 heats, The second port of indoor heat exchanger 201 is outlet end mouth when indoor heat exchanger 201 heats, similarly, the of indoor heat exchanger 201 Single port is air outlet when indoor heat exchanger 201 freezes, and the second port of indoor heat exchanger 201 is indoor heat exchanger 201 Feed liquor port when refrigeration.
Air conditioner is when running heating mode, specific work process are as follows: the first port of four-way reversing valve 103 is 1. with 4. four ports are connected, 2. 3. second port is connected with third port, will run corresponding to the outdoor heat exchanger 104 of heating mode Main control valve 106 is opened, and sub-control valve 107 is closed, and high-temperature gas refrigerant derived from compressor 102 is through four-way reversing valve 103 Heat exchanger 201 is entered the room, the indoor heat exchanger 201 as condenser condenses high-temperature gas refrigerant and discharges heat, with Interior is heated, the liquid phase refrigerant derived from the indoor heat exchanger 201 is passed through the outdoor heat exchanger 104 of operation heating mode In corresponding first throttling device 105, then be passed through operation heating mode outdoor heat exchanger 104 make gas-liquid mixed refrigerant or Liquid phase refrigerant absorbs heat, and vapor phase refrigerant or gas-liquid mixed refrigerant derived from the outdoor heat exchanger 104 are through gas-liquid separation The centrifugation of device 101 enters vapor phase refrigerant in compressor 102, wherein first throttling device 105 was heating Cheng Zhongwei open state, and the degree of superheat of the outdoor heat exchanger 104 of operation heating mode can be adjusted in real time.
Air conditioner is when running heating mode, if there is part outdoor heat exchanger 104 to need to defrost, the specific work of air conditioner Make process are as follows: the outdoor heat exchanger 104 for running heating mode is heated according to the above-mentioned course of work, outdoor heat exchanger to be defrosted 104 specific defrosting process are as follows: will be when the closing of first throttling device 105 corresponding to outdoor heat exchanger 104 first that defrosts is default Between after, main control valve is turned off, when outdoor heat exchanger to be defrosted 104 is close to vacuum state, then will outdoor heat exchanger 104 be defrosted Corresponding sub-control valve 107 and first throttling device 105 are opened, and high-temperature gas refrigerant will enter outdoor heat exchange to be defrosted Device 104 treats defrosting outdoor heat exchanger 104 using the discharged heat of high-temperature gas refrigerant condensation and defrosts, when wait remove After white outdoor heat exchanger 104 completes defrosting operation, sub-control valve 107 corresponding to outdoor heat exchanger 104 to be defrosted is closed, then According to the aperture of first throttling device 105 corresponding to default aperture regulation outdoor heat exchanger 104 to be defrosted, when second is default Between after, i.e., system stablize after, open main control valve 106 corresponding to outdoor heat exchanger 104 to be defrosted, continue to run heating mode.
Air conditioner is when running refrigeration mode, specific work process are as follows: the first port of four-way reversing valve 103 is 1. with 2. Two-port netwerk is connected, 3. 4. third port is connected with the 4th port, runs master corresponding to the outdoor heat exchanger 104 of refrigeration mode Control valve 106 is opened, and sub-control valve 107 is closed, and high-temperature gas refrigerant derived from compressor 102 successively passes through four-way reversing valve 103 and main control valve 106 enter outdoor heat exchanger 104, the outdoor heat exchanger 104 as condenser keeps high-temperature gas refrigerant cold Coalescence discharges heat, and the liquid refrigerant derived from the outdoor heat exchanger 104 enters the room heat exchanger through second throttling device 202 201, the indoor heat exchanger 201 as evaporator makes gas-liquid mixed refrigerant evaporation absorb heat, to freeze to interior, from The centrifugation of vapor phase refrigerant derived from indoor heat exchanger 201 or gas-liquid mixed refrigerant through gas-liquid separator 101, finally makes Vapor phase refrigerant enters in compressor 102.Wherein, first throttling device 105 is full-gear in process of refrigerastion.
Exemplary, an indoor units 2 may include the indoor heat exchanger 201 that multiple phases are connected to side by side, also may include One indoor heat exchanger 201.
Exemplary, the air conditioner includes an outdoor unit 1 and multiple indoor units 2, and multiple indoor units 2 First port be connected, this air conditioner is multi-connected machine, if the air conditioner is frequency conversion, for connected machine;In addition, The air conditioner includes an outdoor unit 1 and an indoor units 2, and this air conditioner is unit machine, if the air-conditioning Device is frequency conversion, then is converter unit machine.
In multi-connected machine, the first throttling device 105 and second throttling device 202 matched can more embody throttling, inhibit Refrigerant back flow protection compressor, the effect for improving heating effect.
In some embodiments, the second throttling device 202 or electric expansion valve.
Another aspect of the present invention embodiment additionally provides a kind of Defrost method of air conditioner, referring to Fig. 4, the Defrost method Specific steps include:
S1: controlling the energized state when four-way reversing valve is in heating, according to defrosting preset condition, determines at least two Part outdoor heat exchanger in a outdoor heat exchanger is outdoor heat exchanger to be defrosted, remaining outdoor heat exchanger is evaporator.
It should be understood that at least two outdoor heat exchangers can be whole outdoor heat exchangers in air conditioner, It can be the part outdoor heat exchanger in whole outdoor heat exchangers, for example, when the quantity of the outdoor heat exchanger in air conditioner is 5 When, at least two outdoor heat exchangers can be 2,3,4 or 5, that is to say, that 2,3,4 or 5 rooms In external heat exchanger, it is partially outdoor heat exchanger to be defrosted, is partially evaporator, so the disclosure also includes both without system Heat, also without the outdoor heat exchanger of defrosting.
It is exemplary, when running heating mode, adopted in real time using the temperature sensor being mounted on the outdoor heat exchanger Collect the temperature on the outdoor heat exchanger coil pipe, the duration of coil temperature is determined using master control borad, and using in air conditioner Circuit board or air conditioner judge whether the duration of coil temperature and coil temperature collected meets the default item of defrosting Part;The defrosting preset condition is that coil temperature is less than preset temperature threshold, and the duration of the coil temperature is greater than in advance If time threshold, if meeting defrosting preset condition, corresponding outdoor heat exchanger becomes outdoor heat exchanger to be defrosted, wait defrost Outdoor heat exchanger can enter defrosting mode, and the outdoor heat exchanger for not meeting defrosting preset condition still runs heating mode (fortune Row heating mode outdoor heat exchanger life be evaporator), thus forming portion locellus external heat exchanger when carrying out defrosting operation, There is part outdoor heat exchanger being heated, can ensure during defrosting, continuously interior can be heated, avoid interior Temperature fluctuation meets the needs of room temperature, improves indoor comfort degree.
In some embodiments, whole outdoor heat exchangers at least two outdoor heat exchangers may meet simultaneously Above-mentioned defrosting condition, for example, the outdoor heat exchanger in air conditioner is 5, the quantity of at least two outdoor heat exchangers is 4 A, then possible 4 outdoor heat exchangers are all satisfied defrosting preset condition, at this point, can make to meet the default item that defrosts according to preset order Part outdoor heat exchanger in whole outdoor heat exchangers of part is outdoor heat exchanger to be defrosted, remaining outdoor heat exchanger is evaporation Device also can guarantee that the part outdoor heat exchanger in whole outdoor heat exchangers is carrying out defrosting operation, part indoor heat exchanger in this way It is being heated, is ensureing indoor temperature value.Exemplary, shown preset order can be according to the installation of multiple outdoor heat exchangers Position determines, for example, from top to bottom or from left to right, can also be determined according to the model of multiple outdoor heat exchangers, power.Herein Without limitation to the preset order.
Exemplary, outdoor temperature >=3 DEG C, the preset temperature threshold is≤- 3 DEG C, the preset time threshold 5 minutes. It should be understood that above-mentioned preset temperature threshold and preset time threshold are the partial condition for determining defrosting, it is not only One condition.
S2: closing that each is described wait the first throttling device corresponding to the outdoor heat exchanger that defrosts, default to first After time, main control valve is turned off, makes the outdoor heat exchanger to be defrosted close to vacuum state.
Exemplary, referring to Fig. 3, it is outdoor heat exchanger 1041, outdoor heat exchanger respectively that the quantity of outdoor heat exchanger, which is three, 1042 and outdoor heat exchanger 1043, main control valve corresponding to outdoor heat exchanger 1041 is 1061, sub-control valve is 1071, first Throttling set is 1051;Main control valve corresponding to outdoor heat exchanger 1042 is 1062, sub-control valve is 1072, first throttle dress It is set to 1052;Main control valve corresponding to outdoor heat exchanger 1043 is 1063, sub-control valve is 1073, first throttling device is 1053.If outdoor heat exchanger 1041, need to carry out defrosting operation, outdoor heat exchanger 1042 and outdoor for outdoor heat exchanger to be defrosted Heat exchanger 1043 still keeps heating mode, and keeping main control valve corresponding to the outdoor heat exchanger 1042 of heating mode is 1062 Keep it turning on, sub-control valve be 1072 remain turned-off, first throttling device is 1052 to keep it turning on, similarly, keep heating mode Outdoor heat exchanger 1043 corresponding to main control valve be 1063 keep it turning on, sub-control valve be 1073 remain turned-off, first segment Stream device is 1053 to keep it turning on, and still, starts the outdoor heat exchanger 1041 of defrosting operation, close outdoor heat exchanger 1041 pair The first throttling device 1051 answered turns off main control valve 1061, the derived refrigeration of indoor units 2 after the first preset time Agent will not continue to be passed through in outdoor heat exchanger 1041, after first throttling device is closed, and continue the first preset time, so that outdoor Heat exchanger 1041 is close to vacuum state.Wherein, the first preset time is generally 15s, without limitation to preset time at this, in a word Need to guarantee before closing main control valve 1061 outdoor heat exchanger 1041 close to vacuum state.
S3: it is described wait sub-control valve corresponding to the outdoor heat exchanger that defrosts and first throttle dress to open each It sets, to defrost to the outdoor heat exchanger to be defrosted.
It is exemplary, referring to Fig. 3, open sub-control valve 1071 and first throttling device corresponding to outdoor heat exchanger 1041 1051, after sub-control valve 1071 and the opening of first throttling device 1051, high temperature liquid refrigerant derived from compressor 10 enters In outdoor heat exchanger 1041, since the outdoor heat exchanger 1041 is close to vacuum state, so after high temperature liquid refrigerant is passed through Will not, it not will lead to outdoor heat exchanger 1041 and issue abnormal sound.
When defrosting to outdoor heat exchanger 1041, heat release is condensed by outdoor heat exchanger using the high temperature liquid refrigerant being passed through Frost on 1041 is removed, due to the condensation liquefaction of high temperature liquid refrigerant, so from the liquid feeding end of outdoor heat exchanger 1041 Medium temperature liquid refrigerant will be exported, after medium temperature liquid refrigerant passes through first throttling device 1051,1051 be full-gear, then It mixes and is passed through in outdoor heat exchanger 1042 and outdoor heat exchanger 1043 together with medium temperature liquid refrigerant derived from indoor units 2. Wherein, it due to the throttling action of first throttling device 1052 and 1053, can prevent from that outdoor heat exchanger 1042 and outdoor is kept to change Refrigerant in hot device 1043 is back to the phenomenon in compressor 102 when evaporating incomplete, guarantee that interior has during defrosting Good heating effect.
It is exemplary, when opening first throttling device 1051 corresponding to outdoor heat exchanger 1041, first throttling device 1051 be full-gear, and the aperture of the first throttling device 1052 corresponding to the outdoor heat exchanger 1042 for carrying out heating mode is big It is small to be adjusted according to the target superheat degree of outdoor heat exchanger 1042, similarly, first segment corresponding to outdoor heat exchanger 1043 The opening size of stream device 1053 can be adjusted according to the target superheat degree of outdoor heat exchanger 1043, when guaranteeing heating operation There are differences for the degree of superheat of air conditioner whole system, the real-time degree of superheat and target superheat degree, are adjusted by PID control method opposite The valve opening size answered, so that super heat value reaches or approaches target superheat angle value in real time.If cannot be according to outdoor in defrosting The real-time degree of superheat of heat exchanger 1042 adjusts the aperture of corresponding first throttling device 1052 in real time, if first throttling device The smaller degree of superheat that can lead to outdoor heat exchanger 1042 of 1052 aperture gas temperature that is excessively high, and then causing compressor to be discharged It is excessively high, the performance of compressor is influenced, while influencing the heat transfer effect of entire air conditioner;If the aperture mistake of first throttling device 1052 It can lead to larger into the flow in outdoor heat exchanger 1042 greatly, liquid refrigerant cannot be evaporated by outdoor heat exchanger 1042 Entirely, liquid refrigerant will be back in compressor, be damaged to compressor.
After the outdoor heat exchanger that defrosts completes defrosting further include: close corresponding to each outdoor heat exchanger to be defrosted After sub-control valve, further according to the aperture of first throttling device corresponding to default aperture regulation outdoor heat exchanger to be defrosted, to After two preset times, opens wait main control valve corresponding to the outdoor heat exchanger that defrosts, carry out normal heating operation.Second it is default when Between generally 15s, this time is not unique, principle be defrosting heat exchanger defrosting after the completion of, make as far as possible complete defrosting operation outdoor Without liquid refrigerants in heat exchanger.The attainable technical effect of institute in this way are as follows: after closing sub-control valve, corresponding first throttling device It is adjusted to initial valve opening, heat exchanger is in evacuated state at this time, it is ensured that the liquid refrigerants of outdoor heat exchanger to be defrosted The outdoor heat exchanger is discharged, when opening main control valve, there will be no liquid refrigerants to enter compressor.
Referring to Fig. 3, from medium temperature liquid refrigerant derived from the outdoor heat exchanger 1041 and from derived from indoor units 2 Warm liquid refrigerant mixing, by the throttling action of 1052 and 1053 first throttling devices, is passed through outdoor heat exchanger 1042 and room In external heat exchanger 1043, ensure that the refrigerant being passed through in outdoor heat exchanger 1042 and outdoor heat exchanger 1043 not is medium temperature refrigeration Agent but low-temperature refrigerant, effectively increase the heat exchange amount of evaporator compared to medium temperature refrigerant, improve heating effect, simultaneously Due to the increase of heat exchange amount, refrigerant backflow phenomenon will not be caused.
When the coil temperature and coil temperature of the temperature sensor detection being mounted on the outdoor heat exchanger 1041 When duration reaches defrosting exit criteria, which just terminates defrosting operation, into heating mode, at this point, If temperature sensor detects that outdoor heat exchanger 1042 meets defrosting preset condition, according to above-mentioned Defrost method to outdoor heat exchange Device 1042 defrosts, and outdoor heat exchanger 1041 and outdoor heat exchanger 1043 keep heating mode, until all outdoor heat exchanges Defrosting preset condition is not satisfied in device, and final whole outdoor heat exchanger enters heating mode.If temperature sensor detects outdoor Heat exchanger 1042 and outdoor heat exchanger 1043 are all satisfied defrosting preset condition, can be simultaneously to outdoor heat exchanger 1042 and outdoor heat exchange Device 1043 defrosts, and is thus heated by outdoor heat exchanger 1041, guarantees indoor temperature value, can also be according to preset order It successively defrosts to outdoor heat exchanger 1042 and outdoor heat exchanger 1043, is always ensured that an outdoor heat exchanger defrosts, two Outdoor heat exchanger heating, is more advantageous to keeps indoor temperature value in this way.The embodiment of the invention also provides a kind of air conditioners Heating method, for the air conditioner when being heated, part outdoor heat exchanger is also carrying out defrosting operation, the heating method Specific steps include:
The energized state when four-way reversing valve keeps heating is controlled, each described outdoor heat exchanger to be defrosted is closed It is described wait sub-control valve corresponding to the outdoor heat exchanger that defrosts to open each for the corresponding main control valve;From institute It states wait refrigerant derived from first throttling device corresponding to the outdoor heat exchanger that defrosts and the refrigeration derived from second throttling device Agent mixing, and be passed through in the evaporator, wherein except the outdoor heat exchanger for crossing outdoor heat exchanger to be defrosted is evaporator, wherein The outdoor heat exchanger that outdoor heat exchanger to be defrosted was removed in the outdoor heat exchanger is evaporator.
When wait defrost outdoor heat exchanger when carrying out defrosting operation, while evaporator is also being heated, referring to Fig. 3, room External heat exchanger 1041 is carrying out defrosting operation, and outdoor heat exchanger 1042 and outdoor heat exchanger 1043 are carrying out heating operation, from room Medium temperature liquid refrigerant derived from first throttling device 1051 corresponding to external heat exchanger 1041 and second throttling device 202 export Medium temperature liquid refrigerant be passed through in outdoor heat exchanger 1042 through first throttling device 1052, while through first throttling device 1053 It is passed through in outdoor heat exchanger 1043, the first throttling device 1052 being mounted on outdoor heat exchanger 1042 and the second throttling dress The collective effect for setting 202 improves the heating effect of outdoor heat exchanger 1042, has ensured heating by the control to the degree of superheat Reliably, stability, while also preventing refrigerant backflow phenomenon.In the description of this specification, specific features, structure, material Or feature can be combined in any suitable manner in any one or more of the embodiments or examples.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims (10)

1. a kind of outdoor unit, comprising: compressor, four-way reversing valve and at least two outdoor heat exchangers;The four-way reversing valve With first port and the 4th state that port is connected and second port is connected with third port and first port and second The state that port conducting and third port are connected with the 4th port, the first port of the four-way reversing valve and the compressor Outlet, the third port of the four-way reversing valve is connected to the entrance of the compressor, the of the outdoor heat exchanger Single port is connected to the second port of the four-way reversing valve, which is characterized in that the outdoor unit further include:
First throttling device, the first throttling device are mounted at the second port of the outdoor heat exchanger;
Main control valve, the main control valve are mounted on the first port and the second of the four-way reversing valve of the outdoor heat exchanger On the pipeline of port connection;
Sub-control valve, the sub-control valve are mounted on the first port of the outdoor heat exchanger and the outlet of the compressor Pipeline on or the pipeline that is connected to of the first port of the outdoor heat exchanger and the 4th port of the four-way reversing valve on.
2. outdoor unit according to claim 1, which is characterized in that the outdoor unit further include:
Gas-liquid separator, one end of the gas-liquid separator are connected to the entrance of the compressor, and the other end is changed with the four-way It is connected to the third port of valve.
3. a kind of air conditioner characterized by comprising outdoor unit and indoor units, the outdoor unit be claim 1 to 2 described in any item outdoor units, wherein the 4th port of the first port of the indoor units and the four-way reversing valve connects Logical, the second port of the indoor units is connected to the second port of the outdoor heat exchanger.
4. air conditioner according to claim 3, which is characterized in that the indoor units include indoor heat exchanger and the second section Device is flowed, the first port of the indoor heat exchanger is connected to the 4th port of the four-way reversing valve, the indoor heat exchanger Second port be connected to the second port of the outdoor heat exchanger, wherein the second throttling device is mounted on the interior At the second port of heat exchanger.
5. air conditioner according to claim 3, which is characterized in that the quantity of the indoor units is multiple, and multiple institutes The first port for stating indoor units is connected, second port is connected.
6. a kind of Defrost method of air conditioner, which is characterized in that apply in the described in any item air-conditionings of the claim 3 to 5 Device, the Defrost method include:
The energized state when four-way reversing valve is in heating is controlled, according to defrosting preset condition, is determined described at least two Part outdoor heat exchanger in outdoor heat exchanger is outdoor heat exchanger to be defrosted, remaining outdoor heat exchanger is evaporator;
It is described wait the first throttling device corresponding to the outdoor heat exchanger that defrosts to close each, after the first preset time, Turn off the main control valve;
It is described wait sub-control valve corresponding to the outdoor heat exchanger that defrosts and the first throttling device to open each, with right The outdoor heat exchanger to be defrosted defrosts.
7. the Defrost method of air conditioner according to claim 6, which is characterized in that described to open the first throttling device Include: control each it is described wait the first throttling device corresponding to the outdoor heat exchanger that defrosts be full-gear.
8. the Defrost method of air conditioner according to claim 6, which is characterized in that the outdoor heat exchanger to be defrosted into During row defrosting: adjusting the first throttle corresponding to the evaporator according to the target superheat degree of the evaporator and fill The aperture set.
9. the Defrost method of air conditioner according to claim 6, which is characterized in that it is described according to defrosting preset condition, really Part outdoor heat exchanger in fixed multiple outdoor heat exchangers is outdoor heat exchanger to be defrosted, remaining outdoor heat exchanger is evaporation Device includes:
When the part outdoor heat exchanger in multiple outdoor heat exchangers meets defrosting preset condition, determine that the part is outdoor Heat exchanger is outdoor heat exchanger to be defrosted, remaining outdoor heat exchanger is evaporator;
When whole outdoor heat exchangers in multiple outdoor heat exchangers meet defrosting preset condition, according to defrosting preset order Enabling the part outdoor heat exchanger in whole outdoor heat exchangers is outdoor heat exchanger to be defrosted, remaining outdoor heat exchanger is evaporation Device.
10. the Defrost method of air conditioner according to claim 6, which is characterized in that the outdoor heat exchanger to be defrosted is complete After defrosting further include: after closing each described described sub-control valve corresponding to the outdoor heat exchanger that defrosts, further according to pre- If the aperture described in aperture regulation wait the first throttling device corresponding to the outdoor heat exchanger that defrosts, to the second preset time Afterwards, it opens described wait the main control valve corresponding to the outdoor heat exchanger that defrosts.
CN201811399712.XA 2018-11-22 2018-11-22 Outdoor unit, air conditioner and its Defrost method Pending CN109612026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811399712.XA CN109612026A (en) 2018-11-22 2018-11-22 Outdoor unit, air conditioner and its Defrost method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811399712.XA CN109612026A (en) 2018-11-22 2018-11-22 Outdoor unit, air conditioner and its Defrost method

Publications (1)

Publication Number Publication Date
CN109612026A true CN109612026A (en) 2019-04-12

Family

ID=66004428

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811399712.XA Pending CN109612026A (en) 2018-11-22 2018-11-22 Outdoor unit, air conditioner and its Defrost method

Country Status (1)

Country Link
CN (1) CN109612026A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109990517A (en) * 2019-04-15 2019-07-09 宁波工程学院 Air conditioner intelligence quickly defrosting and protection control method
WO2021047158A1 (en) * 2019-09-11 2021-03-18 广东美的制冷设备有限公司 Air conditioner and control method therefor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382351A (en) * 2008-10-21 2009-03-11 中南大学 Air source heat pump air conditioner and defrosting method thereof
CN201314725Y (en) * 2008-10-31 2009-09-23 中南大学 Heat pump type room air conditioner
JP2015068609A (en) * 2013-09-30 2015-04-13 ダイキン工業株式会社 Air conditioner
CN104654461A (en) * 2015-01-29 2015-05-27 珠海格力电器股份有限公司 Air conditioner capable of continuously heating and defrosting and control method of air conditioner
CN107449189A (en) * 2017-08-30 2017-12-08 天津大学 A kind of quick vacuum cooling unit and cooling means for eliminating evaporator defrosting waste heat

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382351A (en) * 2008-10-21 2009-03-11 中南大学 Air source heat pump air conditioner and defrosting method thereof
CN201314725Y (en) * 2008-10-31 2009-09-23 中南大学 Heat pump type room air conditioner
JP2015068609A (en) * 2013-09-30 2015-04-13 ダイキン工業株式会社 Air conditioner
CN104654461A (en) * 2015-01-29 2015-05-27 珠海格力电器股份有限公司 Air conditioner capable of continuously heating and defrosting and control method of air conditioner
CN107449189A (en) * 2017-08-30 2017-12-08 天津大学 A kind of quick vacuum cooling unit and cooling means for eliminating evaporator defrosting waste heat

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109990517A (en) * 2019-04-15 2019-07-09 宁波工程学院 Air conditioner intelligence quickly defrosting and protection control method
CN109990517B (en) * 2019-04-15 2019-11-05 宁波工程学院 Air conditioner intelligence quickly defrosting and protection control method
WO2021047158A1 (en) * 2019-09-11 2021-03-18 广东美的制冷设备有限公司 Air conditioner and control method therefor

Similar Documents

Publication Publication Date Title
CN108131858B (en) A kind of heat pump air conditioning system and its control method
JP6685409B2 (en) Air conditioner
CN211739591U (en) Air conditioning system and air conditioning equipment that incessant heats
US8424333B2 (en) Air conditioner
CN104061705A (en) Two-stage compression air conditioner system and control method thereof
JPH07234038A (en) Multiroom type cooling-heating equipment and operating method thereof
KR100821728B1 (en) Air conditioning system
EP3388758A1 (en) Heat-pump air conditioner
CN106247654B (en) The multi-functional multi-connected air conditioning system of two control of one kind and its control method
CN104220816B (en) Air conditioner
CN109405365A (en) Coolant circulating system and its control method, conditioner
CN104329824A (en) Multi-connected type air conditioner system and control method thereof
CN203964436U (en) Two-stage Compression air-conditioning system
CN106440462A (en) Air conditioning unit and control method for same
WO2009028841A2 (en) Refrigerator
CN106052181A (en) Air conditioner system and control method thereof
WO2019091240A1 (en) Heating circulation system for air conditioning, and air conditioner
CN109612026A (en) Outdoor unit, air conditioner and its Defrost method
CN108007016A (en) The control method of heat pump system and heat pump system
CN109654764A (en) A kind of two-stage enthalpy increasing system and its defrosting control method
CN111811036A (en) Dehumidification and reheating multi-connected air conditioning system and control method thereof
CN107499089A (en) A kind of electric automobile heat-pump air-conditioning system and its method of work
WO2019224944A1 (en) Air conditioner
CN106766334A (en) A kind of air conditioner circulating system and control method
WO2022110761A1 (en) Air conditioner

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No.

Applicant after: Hisense (Shandong) Air-conditioning Co., Ltd.

Address before: 266736 Qingdao, Pingdu City, South Village, North Station, Hisense Road, No. 1, No.

Applicant before: Hisense (Shandong) Air-conditioning Co., Ltd.

RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190412