CN106016535B - Air injection enthalpy-increasing air-conditioning system and its defrosting control method - Google Patents

Air injection enthalpy-increasing air-conditioning system and its defrosting control method Download PDF

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Publication number
CN106016535B
CN106016535B CN201610383076.6A CN201610383076A CN106016535B CN 106016535 B CN106016535 B CN 106016535B CN 201610383076 A CN201610383076 A CN 201610383076A CN 106016535 B CN106016535 B CN 106016535B
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China
Prior art keywords
air
conditioning
defrosting
heat exchanger
compressor
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CN201610383076.6A
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CN106016535A (en
Inventor
温凤
刘博�
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30Arrangement or mounting of heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001Compression cycle type
    • 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, plant 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
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/22Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
    • 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
    • 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
    • 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
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems

Abstract

The invention discloses a kind of air injection enthalpy-increasing air-conditioning systems, the air injection enthalpy-increasing air-conditioning system includes indoor heat exchanger, outdoor heat exchanger, compressor and four-way reversing valve: compressor includes fluid reservoir, compressor is equipped with exhaust outlet, gas supplementing opening and air entry, fluid reservoir is equipped with gas returning port, and gas returning port is connected to air entry;Four-way reversing valve has first end to the 4th end, and first end is connected to the exhaust outlet of compressor, and second end connects the import of indoor heat exchanger, and third end connects the outlet of outdoor heat exchanger, and the 4th end is connected to gas returning port;Air-conditioning system further includes bypass circulation, and bypass circulation is connected between the exhaust outlet of compressor and outdoor heat exchanger, and bypass circulation includes control valve.The invention also discloses a kind of defrosting control methods.It is defrosted using method of the invention, does not influence heating effect not only, and indoor environment temperature can be stablized, reduced four-way reversing valve commutation action to increase the reliability of equipment and improve user's comfort.

Description

Air injection enthalpy-increasing air-conditioning system and its defrosting control method
Technical field
The present invention relates to cooling and warming technical field more particularly to air injection enthalpy-increasing air-conditioning system and its defrosting control methods.
Background technique
Heat pump type air conditioner can also not only heat in winter in cooling in summer, thus will be widely welcomed by user. In heating operations, since outdoor environment temperature is lower, humidity is larger, is easy to appear frosting situation, if air-conditioning frosting is serious, Air-conditioning system can execute defrost movement automatically, and when the defrost time, setting was too short, it is unclean to will lead to outdoor unit defrost, Jin Erying Heating effect is rung, and increases the power consumption of user, reduces efficiency;And when the defrost time, setting was too long, then it will use Family comfort is had a greatly reduced quality, it is also possible to the case where when there is defrost to blows cold wind indoors, therefore, change defrosting control Method just can solve this problem.
Summary of the invention
It is a primary object of the present invention to propose a kind of air injection enthalpy-increasing air-conditioning system and its defrosting control method, it is intended to not shadow User's comfort is improved while ringing heating effect.
To achieve the above object, the present invention provides a kind of air injection enthalpy-increasing air-conditioning system, the air injection enthalpy-increasing air-conditioning system packet Include indoor heat exchanger, outdoor heat exchanger, compressor and four-way reversing valve:
The compressor includes fluid reservoir, and the compressor is equipped with exhaust outlet, gas supplementing opening and air entry, and the fluid reservoir is set There is gas returning port, the gas returning port is connected to the air entry;
The four-way reversing valve has first end to the 4th end, and the first end is connected to the exhaust outlet of the compressor, The second end connects the import of the indoor heat exchanger, and the third end connects the outlet of the outdoor heat exchanger, and described Four ends are connected to the gas returning port;
The air injection enthalpy-increasing air-conditioning system further includes bypass circulation, and the bypass circulation is connected to the exhaust of the compressor Between mouth and the outdoor heat exchanger, the bypass circulation includes control valve.
Preferably, the air injection enthalpy-increasing air-conditioning system further includes gas-liquid separator, and the gas-liquid separator includes entrance, gas Body outlet and liquid outlet, the entrance are connected with the outlet of the indoor heat exchanger, the gas vent and the gas supplementing opening It is connected, the liquid outlet is connected with the import of the outdoor heat exchanger.
Preferably, first throttle dress is connected between the outlet and the entrance of the gas-liquid separator of the indoor heat exchanger It sets, is connected with second throttling device between the liquid outlet of the gas-liquid separator and the import of the outdoor heat exchanger.
Preferably, the control valve is solenoid valve, and when entering bypass defrosting in a heating mode, the solenoid valve is opened.
Preferably, the first throttling device and second throttling device are electric expansion valve.
In addition, to achieve the above object, the present invention also provides a kind of defrostings applied to above-mentioned air injection enthalpy-increasing air-conditioning system Control method, the defrosting control method the following steps are included:
After air-conditioning system enters heating mode, outdoor environment temperature is detected;
Preset temperature section locating for the outdoor environment temperature confirmly detected;
Air-conditioning system is controlled according to corresponding defrosting rule according to preset temperature section locating for the outdoor environment temperature System carries out bypass defrosting.
Preferably, when air-conditioning system carries out bypass defrosting, opening controlling valve, control outdoor fan is out of service, and by pre- If amplitude improve compressor running frequency.
Preferably, the defrosting control method further include:
Air-conditioning system carries out bypass defrosting preset time backed off after random bypass defrosting, closes control valve.
The present invention between the exhaust outlet and outdoor heat exchanger of compressor by connecting a bypass circulation, the bypass circulation packet Control valve is included, when entering bypass defrosting in a heating mode, control valve is opened, and refrigerant directly passes through bypass circulation from compressor It flows into outdoor heat exchanger, defrosts.It is defrosted using the method, does not influence heating effect not only, and can be in equalization chamber Environment temperature reduces four-way reversing valve commutation action to increase the reliability of equipment and improves user's comfort.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of air injection enthalpy-increasing air-conditioning system of the present invention;
Fig. 2 is the flow diagram of the defrosting control method first embodiment of air injection enthalpy-increasing air-conditioning system of the present invention;
Fig. 3 is the flow diagram of the defrosting control method second embodiment of air injection enthalpy-increasing air-conditioning system of the present invention.
Drawing reference numeral explanation:
Label Title Label Title
100 Indoor heat exchanger 101 Indoor heat exchanger import
102 Indoor heat exchanger outlet 200 Outdoor heat exchanger
201 Outdoor heat exchanger outlet 202 Outdoor heat exchanger import
300 Compressor 301 Exhaust outlet
302 Gas supplementing opening 303 Air entry
310 Fluid reservoir 311 Gas returning port
400 Four-way reversing valve 401-404 Four end of first end-the
500 Bypass circulation 501 Control valve
600 Gas-liquid separator 601 Entrance
602 Gas vent 603 Liquid outlet
700 First throttling device 800 Second throttling device
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of air injection enthalpy-increasing air-conditioning system.
Referring to Fig.1, Fig. 1 is the structural schematic diagram of air injection enthalpy-increasing air-conditioning system of the present invention.
In one embodiment of the invention, air injection enthalpy-increasing air-conditioning system includes indoor heat exchanger 100, outdoor heat exchanger 200, compression Machine 300 and four-way reversing valve 400:
The compressor 300 includes fluid reservoir 310, and the compressor 300 is equipped with exhaust outlet 301, gas supplementing opening 302 and air-breathing Mouth 303, the fluid reservoir 310 are equipped with gas returning port 311, and the gas returning port 311 is connected to the air entry 303;
The four-way reversing valve 400 has 401 to the 4th end 404 of first end, the first end 401 and the compressor 300 exhaust outlet 301 is connected to, and the second end 402 connects the import 101 of the indoor heat exchanger 100, the third end 403 The outlet 201 of the outdoor heat exchanger 200 is connected, the 4th end 404 is connected to the gas returning port 311.The four of the present embodiment Logical reversal valve 400 is preferably four-way valve, and when air-conditioning system is in heating mode, first end 401 is connected to second end 402, the Three ends 403 are connected to the 4th end 404;When air-conditioning system is in refrigeration mode, first end 401 is connected to third end 403, and second End 402 is connected to the 4th end 404.Certainly, the invention is not limited thereto, and four-way reversing valve 400 can also be formed as other elements, only There is 401 to the 4th end 404 of first end and can realize commutation.
The air-conditioning system further includes bypass circulation 500, and the bypass circulation 500 is connected to the row of the compressor 300 Between port 301 and the outdoor heat exchanger 200, the bypass circulation 500 includes control valve 501;Enter in a heating mode When bypass defrosting, the control valve 501 is opened, and refrigerant directly passes through the bypass circulation from the exhaust outlet 301 of compressor 300 500, and flowed into outdoor heat exchanger 200 via the import 202 of the outdoor heat exchanger 200, it defrosts.The control of the present embodiment Valve 501 processed is preferably solenoid valve.
In the present embodiment, the air-conditioning system further includes gas-liquid separator 600, and the gas-liquid separator 600 includes entrance 601, gas vent 602 and liquid outlet 603, the entrance 601 is connected with the outlet 102 of the indoor heat exchanger 100, described Gas vent 602 is connected with the gas supplementing opening 302,202 phase of import of the liquid outlet 603 and the outdoor heat exchanger 200 Even.
Further, between the outlet 102 of the indoor heat exchanger 100 and the entrance 601 of the gas-liquid separator 600 Be connected with first throttling device 700, the gas-liquid separator 600 liquid outlet 602 and the outdoor heat exchanger 200 into Second throttling device 800 is connected between mouth 202.The first throttling device 700 and second throttling device 800 of the present embodiment are preferred For electric expansion valve.
When air-conditioning system is in heating mode, the gaseous refrigerant of low-temp low-pressure is compressed to height after compressor 101 The gaseous refrigerant of the gaseous refrigerant of warm high pressure, high temperature and pressure is divided into two-way in 101 exhaust outlet of compressor, passes through four-way all the way The indoor heat exchanger 100, the gaseous state of high temperature and pressure are entered by the import 101 of the indoor heat exchanger 100 after reversal valve 400 After refrigerant and cold air inside heat exchange, indoor air temperature is increased, and refrigerant temperature reduces, and becomes the liquid system of high pressure low temperature Cryogen, for the liquid refrigerant of high pressure low temperature after first throttling device 700 is throttled, liquid refrigerant becomes gas-liquid two-phase Refrigerant, gas-liquid two-phase cold-producing medium are shunted using gas-liquid separator 600, and gas-liquid two-phase mix refrigerant is in gas-liquid separation It is divided into the liquid refrigerant of bottom and the gaseous refrigerant on top in device 600, gaseous refrigerant directly passes through the gas-liquid separation The gas vent 601 of device 600 flows into the gas supplementing opening 302 of compressor 300, continues to recycle next time;Liquid refrigerant passes through The liquid outlet 602 of gas-liquid separator 600 is flowed into second throttling device 800 and is throttled, the liquid refrigeration after throttling Agent is flowed into outdoor heat exchanger 200 by the import 202 of outdoor heat exchanger 200, after being exchanged heat in outdoor heat exchanger 200 Refrigerant flows back to the gas returning port of compressor 101, continues the compression recycled next time.
When air conditioner is in heating mode, in real time or by certain time interval timing detection outdoor environment temperature, and really Preset temperature section locating for the outdoor environment temperature that regular inspection measures, the preset temperature area according to locating for outdoor environment temperature Between, according to the rule of defrosting corresponding to each preset temperature section, control air-conditioning system enters bypass defrosting.It defrosts into bypass When, the control valve 501 of bypass circulation 500 is opened, control outdoor fan is out of service, and improves compressor frequency by preset amplitude Rate, the present embodiment preset amplitude may be configured as 5-10Hz, other components of air-conditioning also keep the state of original non-defrost, the The aperture of one throttling set 700 and second throttling device 800 remains unchanged, and indoor fan revolving speed remains unchanged;In compressor 300 High temperature and pressure gaseous refrigerant directly by exhaust outlet 301 flow into bypass circulation 500, flow into outdoor by control valve 501 and change In hot device 200, with by the liquid outlet 602 of gas-liquid separator 600 flow into the liquid refrigerant in outdoor heat exchanger 200 into Row mixing completes a heating circulation to defrost.
After entering bypass defrosting, it can also open timer and carry out timing, when reaching preset time, close control valve 501, bypass defrosting is exited, air-conditioning system normally heats, and the preset time of the present embodiment may be configured as 20 seconds~30 seconds.
The present embodiment is by connecting a bypass circulation between the exhaust outlet 301 and outdoor heat exchanger 200 of compressor 300 500, which includes control valve 501, and when entering bypass defrosting in a heating mode, control valve 501 is opened, refrigeration Agent directly flows into outdoor heat exchanger 200 from compressor 300 by bypass circulation 500, defrosts.It is defrosted using the method, Heating effect is not influenced not only, and can stablize indoor environment temperature, four-way reversing valve commutation action is reduced, to increase The reliability of equipment improves user's comfort.
The present invention also provides a kind of defrosting control methods of air injection enthalpy-increasing air-conditioning system.
Referring to the process signal that Fig. 2, Fig. 2 are the defrosting control method first embodiment of air injection enthalpy-increasing air-conditioning system of the present invention Figure.
In one embodiment of the invention, the defrosting control method of air-conditioning system includes:
Step S10 after air-conditioning system enters heating mode, detects outdoor environment temperature;
Step S20, preset temperature section locating for the outdoor environment temperature confirmly detected;
Step S30, according to preset temperature section locating for the outdoor environment temperature, according to corresponding defrosting rule, control Air-conditioning system processed carries out bypass defrosting.
Defrosting control method in the present embodiment is applied to air-conditioning system described in above-mentioned Fig. 1 embodiment.In air conditioner When in heating mode, in real time or by certain time interval timing detection outdoor environment temperature T1, and confirmly detect described Preset temperature section locating for outdoor environment temperature T1, according to preset temperature section locating for outdoor environment temperature T1, according to every The rule of defrosting corresponding to a preset temperature section, control air-conditioning system enter bypass defrosting.The preset temperature section can root It is divided according to temperature values, and each preset temperature section is corresponding with defrosting rule, the present embodiment is preferably divided into 4 A temperature range, such as: it is the first temperature range when T1 >=0 DEG C, corresponding first defrosting rule opened one every 50 minutes Secondary bypass defrosting;It is second temperature section when -7 DEG C≤T1 < 0 DEG C, corresponding second defrosting rule opened one every 40 minutes Secondary bypass defrosting;It is third temperature range when -12 DEG C≤T1 < -7 DEG C, corresponding third defrosting rule was opened every 30 minutes Primary bypass defrosting;It is the 4th temperature range when T1 < -12 DEG C, corresponding 4th defrosting rule was opened primary every 20 minutes Bypass defrosting.
Into when bypass defrosting, the control valve of bypass circulation is opened, control outdoor fan is out of service, and presses preset width Degree improves compressor frequency, and the present embodiment preset amplitude may be configured as 5-10Hz, other components of air-conditioning also keep original The aperture of the state of non-defrost, first throttling device and second throttling device remains unchanged, and indoor fan revolving speed remains unchanged;Pressure The gaseous refrigerant of high temperature and pressure in contracting machine directly flows into bypass circulation by exhaust outlet, flows into outdoor heat exchanger by control valve In, the liquid refrigerant flowed into outdoor heat exchanger with the liquid outlet by gas-liquid separator is mixed, to carry out A heating circulation is completed in defrosting.
The present embodiment between the exhaust outlet and outdoor heat exchanger of compressor by connecting a bypass circulation, in heating mode When the lower defrosting into bypass, refrigerant is directly flowed into outdoor heat exchanger from compressor by bypass circulation, is defrosted.Using The method defrosting, does not influence heating effect not only, and can stablize indoor environment temperature, and it is dynamic to reduce four-way reversing valve commutation Make, to increase the reliability of equipment, improves user's comfort.
Referring to the process signal that Fig. 3, Fig. 3 are the defrosting control method second embodiment of air injection enthalpy-increasing air-conditioning system of the present invention Figure.
Based on the above embodiment, in second embodiment, after step S30, the defrosting control method of the air-conditioning system Further include:
Step S40, air-conditioning system carry out bypass defrosting preset time backed off after random bypass defrosting, close control valve.
After entering bypass defrosting, it can also open timer and carry out timing, when reaching preset time, close control valve 501, bypass defrosting is exited, air-conditioning system normally heats, and the preset time of the present embodiment may be configured as 20 seconds~30 seconds.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills Art field, is included within the scope of the present invention.

Claims (8)

1. a kind of air injection enthalpy-increasing air-conditioning system, which is characterized in that the air injection enthalpy-increasing air-conditioning system includes indoor heat exchanger, outdoor Heat exchanger, compressor and four-way reversing valve:
The compressor includes fluid reservoir, and the compressor is equipped with exhaust outlet, gas supplementing opening and air entry, and the fluid reservoir is equipped with back Port, the gas returning port are connected to the air entry;
The four-way reversing valve has first end to the 4th end, and the first end is connected to the exhaust outlet of the compressor, described Second end connects the import of the indoor heat exchanger, and the third end connects the outlet of the outdoor heat exchanger, the 4th end It is connected to the gas returning port;
The air-conditioning system further includes bypass circulation, the bypass circulation be connected to the compressor exhaust outlet and the outdoor Between the import of heat exchanger, the bypass circulation includes control valve;
After the air injection enthalpy-increasing air-conditioning system enters heating mode, outdoor environment temperature, the outdoor environment confirmly detected are detected Preset temperature section locating for temperature, and determine prefixed time interval corresponding to locating preset temperature section, described in control Control valve is opened once every the prefixed time interval, to open primary bypass defrosting every the prefixed time interval.
2. air injection enthalpy-increasing air-conditioning system as described in claim 1, which is characterized in that the air injection enthalpy-increasing air-conditioning system further includes Gas-liquid separator, the gas-liquid separator include entrance, gas vent and liquid outlet, the entrance and the indoor heat exchanger Outlet be connected, the gas vent is connected with the gas supplementing opening, the import phase of the liquid outlet and the outdoor heat exchanger Even.
3. air injection enthalpy-increasing air-conditioning system as claimed in claim 2, which is characterized in that the outlet of the indoor heat exchanger with it is described First throttling device, the liquid outlet of the gas-liquid separator and the outdoor heat exchange are connected between the entrance of gas-liquid separator Second throttling device is connected between the import of device.
4. air injection enthalpy-increasing air-conditioning system as described in claim 1, which is characterized in that the control valve is solenoid valve, is being heated When entering bypass defrosting under mode, the solenoid valve is opened.
5. air injection enthalpy-increasing air-conditioning system as claimed in claim 3, which is characterized in that the first throttling device and the second throttling Device is electric expansion valve.
6. a kind of defrosting control method applied to air injection enthalpy-increasing air-conditioning system described in any one of claim 1 to 5, feature Be, the defrosting control method the following steps are included:
After air-conditioning system enters heating mode, outdoor environment temperature is detected;
Preset temperature section locating for the outdoor environment temperature confirmly detected;
According to preset temperature section locating for the outdoor environment temperature, according to corresponding defrosting rule, control air-conditioning system into Row bypass defrosting;Defrosting rule is opens primary bypass defrosting every prefixed time interval, the prefixed time interval and pre- If temperature range is corresponding.
7. defrosting control method as claimed in claim 6, which is characterized in that when air-conditioning system carries out bypass defrosting, open control Valve processed, control outdoor fan is out of service, and the running frequency of compressor is improved by preset amplitude.
8. defrosting control method as claimed in claims 6 or 7, which is characterized in that the defrosting control method further include:
Air-conditioning system carries out bypass defrosting preset time backed off after random bypass defrosting, closes control valve.
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CN106091464B (en) * 2016-05-31 2018-12-25 广东美的制冷设备有限公司 Air injection enthalpy-increasing air-conditioning system and its defrosting control method
CN106016810B (en) * 2016-05-31 2018-12-25 广东美的制冷设备有限公司 Air injection enthalpy-increasing air-conditioning system and its defrosting control method
CN108375248A (en) * 2017-12-29 2018-08-07 青岛海尔空调器有限总公司 Air-conditioner system
CN108375255B (en) * 2017-12-29 2019-12-06 青岛海尔空调器有限总公司 Air conditioner system
CN109990429B (en) * 2019-03-15 2021-04-09 奥克斯空调股份有限公司 Air conditioner defrosting control method and air conditioner
CN110736207A (en) * 2019-09-26 2020-01-31 青岛海尔空调器有限总公司 Control method and control device for defrosting of air conditioner and air conditioner
CN110966797B (en) * 2019-12-10 2021-01-15 珠海格力电器股份有限公司 Vehicle heat pump air conditioning system and control method thereof

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