CN203454507U - Intelligent defrosting air-conditioning system - Google Patents

Intelligent defrosting air-conditioning system Download PDF

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Publication number
CN203454507U
CN203454507U CN201320461306.8U CN201320461306U CN203454507U CN 203454507 U CN203454507 U CN 203454507U CN 201320461306 U CN201320461306 U CN 201320461306U CN 203454507 U CN203454507 U CN 203454507U
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China
Prior art keywords
conditioning system
air
pipeline
compressor
heat exchanger
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Expired - Fee Related
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CN201320461306.8U
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Chinese (zh)
Inventor
熊美兵
李�根
许永锋
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Guangdong Midea HVAC Equipment Co Ltd
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Guangdong Midea HVAC Equipment Co Ltd
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Abstract

The utility model provides an intelligent defrosting air-conditioning system which comprises a compressor, a sliding valve, an outdoor heat exchanger, a throttling component, a refrigerant circulation loop and a controller. The refrigerant circulation loop is formed by an indoor heat exchanger, and the controller controls operation of the air-conditioning system. A refrigerant adjusting pipeline structure comprising a control valve and a liquid storage tank is arranged between a liquid side pipeline and a gas side pipeline. A pressure sensor used for detecting the low pressure of the system is arranged between the liquid side pipeline and the gas side pipeline. When being used for defrosting, the air-conditioning system controls connection and disconnection of the corresponding control valve according to the low pressure, detected by the pressure sensor, of the system for adjusting the amount of gas-state refrigerants of the lower pressure side of the system, and ensures effective defrosting of the air-conditioning system. Meanwhile, the liquid refrigerants are prevented from flowing back into the compressor and causing liquid impact, so that the safety of the air-conditioning system is improved.

Description

Intelligent defrosting air-conditioning system
Technical field
The utility model belongs to from air-conditioning technical field, more particularly, relates to a kind of intelligent defrosting air-conditioning system.
Background technology
During air-conditioning system operation heating mode; outdoor temperature is generally all lower; and outdoor heat exchanger also needs to absorb heat; at this moment outdoor unit heat exchanger body temperature can drop to below 0 ℃; moisture around will soon condense into frost and be accumulated on heat exchanger; if do not defrost; off-premises station is probably blocked by ice cube; have a strong impact on heat exchanger radiating efficiency and effect; if ice cube is tied thicker and thicker; even there will be situation about cannot dispel the heat, finally cause the refrigerant in off-premises station to evaporate, make the too low meeting of system pressure jump low-voltage variation and shut down.
Existing air-conditioning itself is substantially all with the function of outdoor defrosting, when temperature, time, reaches the standard of setting,, will automatically move defrosting mode to solve the problem of frosting.And when system operation defrosting mode, the direct transformation of ownership heat of air-conditioning system is refrigeration mode, off-premises station blower fan and indoor set blower fan are all out of service, heat exchanger can not effectively carry out heat exchange, easily cause liquid refrigerants to flow back into compressor, cause liquid hit phenomenon and damage subtract the service life of air-conditioning system or cause potential safety hazard.
Utility model content
The purpose of this utility model be to provide a kind of simple in structure, control intelligent defrosting air-conditioning system accurate, easy and simple to handle, with low cost, be intended to overcome prior art and know deficiency, guarantee that air-conditioning system is when effectively defrosting, can avoid again liquid refrigerant stream to return compressor and cause liquid hammer, thus the security that improves air-conditioning system.
For achieving the above object, the technical solution adopted in the utility model is: a kind of intelligent defrosting air-conditioning system is provided, comprises by pipeline and connect the refrigerant circulation circuit of at least one compressor, reversal valve, outdoor heat exchanger, throttle part, indoor heat exchanger formation and control the controller that air-conditioning system is moved;
Pipeline between described outdoor heat exchanger and described throttle part is also connected with a refrigerant and regulates bypass branch road, described refrigerant regulates on bypass branch road and is serially connected with in turn the first control valve of being controlled by described controller and a fluid reservoir, is connected with a gaseous coolant and regulates pipeline on described fluid reservoir;
Described gaseous coolant regulates pipeline to be connected with the air entry of described compressor by gas side line, and this gaseous coolant regulates pipeline to be provided with second control valve of being controlled by described controller;
On described gas side line, near the air entry place of described compressor, be also provided with a pressure sensor, for detection of the low pressure of system and by this low pressure signal feedback to controller.
Preferably, described reversal valve is cross valve, and the D mouth of pipe of described cross valve, the E mouth of pipe, the S mouth of pipe and the C mouth of pipe are connected respectively the air entry of the exhaust outlet of described compressor, described indoor heat exchanger, described compressor, described outdoor heat exchanger.
Further, on described fluid reservoir, be also provided with the refrigerant heater of controlling, heating for the refrigerant in described fluid reservoir by described controller.
Further, on described gas side line, be also provided with a gas-liquid separator, and described low pressure sensor is on the pipeline between described gas-liquid separator and described compressor.
Alternatively, described throttle part is a kind of in capillary, electric expansion valve, heating power expansion valve.
Alternatively, described the first control valve is magnetic valve or electric expansion valve
Alternatively, described the second control valve is magnetic valve or electric expansion valve.
Further, on the high-pressure liquid tube pipeline being connected with described indoor heat exchanger and low pressure gas pipe pipeline, be also respectively equipped with a stop valve.
The beneficial effect of the intelligent defrosting air-conditioning system that the utility model provides is: between the liquid lateral line of the utility model intelligent defrosting air-conditioning system in existing common air-conditioning system and return-air lateral line, set up and can carry out the supplementary refrigerant of gaseous coolant to the return-air side of compressor and regulate bypass branch road and corresponding control valve, controller can be made corresponding instruction at the low pressure under defrosting mode according to system and be controlled corresponding control valve break-make, in real time, to system low-voltage side, supplement accurately the refrigerant of gaseous state, reach and guaranteeing when effectively defrosting, can avoid again liquid refrigerant stream to return the object that compressor causes liquid hit phenomenon, thereby improved the security of air-conditioning system, and the utility model intelligent defrosting air-conditioning system is simple in structure, easy and simple to handle, with low cost.
Accompanying drawing explanation
Theory structure and the running status figure mono-of the intelligent defrosting air-conditioning system that Fig. 1 provides for the utility model embodiment mono-;
Theory structure and the running status figure bis-of the intelligent defrosting air-conditioning system that Fig. 2 provides for the utility model embodiment mono-;
Theory structure and the running status figure tri-of the intelligent defrosting air-conditioning system that Fig. 3 provides for the utility model embodiment mono-;
The principle assumption diagram of the intelligent defrosting air-conditioning system that Fig. 4 provides for the utility model embodiment bis-;
The principle assumption diagram of the intelligent defrosting air-conditioning system that Fig. 5 provides for the utility model embodiment tri-;
The principle assumption diagram of the intelligent defrosting air-conditioning system that Fig. 6 provides for the utility model embodiment tetra-.
In figure:
1: compressor; 2: cross valve; 3: outdoor heat exchanger; 41: throttle part; 5: indoor heat exchanger; 61: the first control valves; 62: the second control valves; 7: fluid reservoir; 70: gaseous coolant regulates pipeline; 8: pressure sensor; 9: refrigerant heater; 10: gas side line; 11: gas-liquid separator; 13: stop valve; 100: refrigerant regulates bypass branch road.
The specific embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Embodiment mono-
Refer to Fig. 1 to Fig. 3, the existing intelligent defrosting air-conditioning system that the utility model embodiment mono-is provided describes.This intelligent defrosting air-conditioning system comprises by pipeline and connects the refrigerant circulation circuit of at least one compressor 1, cross valve, outdoor heat exchanger 3, throttle part 41, indoor heat exchanger 5 formation and control the controller (not shown) that air-conditioning system is moved; In the present embodiment, reversal valve adopts cross valve 2, certainly also available two triple valves combine and play commutation function, this cross valve 2 has the D mouth of pipe, the E mouth of pipe, the S mouth of pipe and the C mouth of pipe, wherein, the D mouth of pipe is connected with the exhaust outlet of compressor 1, and the E mouth of pipe is connected with indoor heat exchanger 5, the C mouth of pipe is connected with outdoor heat exchanger 3, and the S mouth of pipe is connected with the air entry of described compressor; Pipeline between outdoor heat exchanger 3 and throttle part 41 is also connected with refrigerant and regulates bypass branch road 100, at this refrigerant, regulate on bypass branch road 100 and be serially connected with in turn the first control valve 61 and the fluid reservoir 7 of being controlled by controller, on this fluid reservoir 7, be connected with gaseous coolant and regulate pipeline 70; Wherein, gaseous coolant regulates pipeline 70 to be connected with the air entry of compressor 1 by gas side line 10, and this gaseous coolant regulates pipeline 70 to be provided with the second control valve 62 of being controlled by controller; And on gas side line 10, near the air entry place of compressor 1, be also provided with pressure sensor 8, this pressure sensor 8 for detection of the low pressure Pd of system and by this low pressure signal feedback to controller.
Between the liquid lateral line of the utility model intelligent defrosting air-conditioning system in existing common air-conditioning system and return-air lateral line, set up and can carry out the supplementary refrigerant of gaseous coolant to the return-air side of compressor and regulate bypass branch road 100 and corresponding control valve, when air-conditioning system operation defrosting mode, it is identical when in system, the traffic direction of refrigerant is with cooling system, off-premises station blower fan and indoor set blower fan are all out of service, outdoor heat exchanger 3 and indoor heat exchanger 5 all can not carry out heat exchange effectively, during refrigerant process outdoor heat exchanger 3, carry out defrost, but refrigerant can not fully liquefy, controller is controlled the first control valve 61 and is opened, make a certain amount of refrigerant (gaseous state+liquid state) enter into the interior storage of fluid reservoir 7, along with defrost process continue carry out, because indoor set blower fan stops, indoor heat exchanger 5 can not fully gasify refrigerant as evaporimeter, like this, the low pressure Pd of system is more and more lower, when the low pressure Pd that system detected when pressure sensor 8 drops to the reference pressure value P0 being less than or equal in the program drawing by experiment and be set in advance in controller, controller will send instruction the second control valve 62 is opened, gaseous coolant in fluid reservoir 7 just regulates pipeline 70 enter into the gas side line 10 of system and the low pressure Pd of system is improved by gaseous coolant like this, also with regard to having avoided liquid refrigerants to flow out to get back in compressor 1 from indoor heat exchanger 5 because the low pressure Pd of system is too low, cause liquid hit phenomenon, said process constantly repeats until whole defrost process finishes, the with security and stability operation of the system that finally guarantees in whole defrost process.
In summary it can be seen, the intelligent defrosting air-conditioning system that the utility model provides can be made corresponding instruction according to system low pressure Pd of system under defrosting mode by controller and be controlled corresponding control valve break-make, in real time, to system low-voltage side and compressor 1, supplement the corresponding gaseous coolant amount that regulates accurately, reach and guaranteeing when effectively defrosting, can avoid again liquid refrigerant stream to return compressor 1 and cause liquid hit phenomenon, improve the security of air-conditioning system; And the utility model intelligent defrosting air-conditioning system is simple in structure, easy and simple to handle, with low cost.
In the present embodiment, throttle part 41 can be selected a kind of in capillary, electric expansion valve, heating power expansion valve; But this sentences and selects electric expansion valve is good, because electric expansion valve can accurately be controlled the flow of refrigerant; Reaction speed is faster than heating power expansion valve, can reach in time the required open degree of defrosting, improves defrost performance, and evaporating temperature is also more stable; And can control better suction superheat, adapt to larger refrigeration scope.
In the present embodiment, the first control valve 61, the second control valve 62 can be selected magnetic valve or electric expansion valve.But consider from cost and function, the first control valve 61 selects magnetic valve better, it is good that the second control valve 62 adopts electric expansion valve.
Refer to the arbitrary diagram of Fig. 1 to Fig. 3, with on the high-pressure liquid tube pipeline being connected of indoor heat exchanger 5 and low pressure gas pipe pipeline, be also respectively equipped with a stop valve 13, can manually control like this keying spool and control passing through and cut-off of refrigerant, for installing and overhaul air-conditioning system, provide convenience.
Refer to Fig. 1 to 3, the intelligent defrosting air-conditioning system that the utility model embodiment mono-provides is moved according to following steps:
(1) controller is controlled air-conditioning system and is entered Defrost operation state; Refer to Fig. 1, at this moment, intrasystem refrigerant traffic direction is identical with under refrigeration mode, enters outdoor heat exchanger 3 and carries out with it heat exchange, thereby the frost concentrating on outdoor heat exchanger 3 is melted from the exhaust outlet of compressor 1 HTHP gaseous coolant out;
(2) while and just starting to defrost, controller controls that the first control valve 61 is opened, the second control valve 62 is closed, and in outdoor heat exchanger 3, the inadequate part high temperature of liquefaction, high pressure refrigerant out flows into fluid reservoirs 7 and store in it through bypass branch road 100 like this;
(3) in the process of whole defrosting, pressure sensor 8 detect the low pressure Pd of air-conditioning systems and by this low pressure signal feedback to controller, and the every process of aforesaid action Δ t interval time repeats once, and this interval time, Δ t preset in the program of controller; ;
(4) controller relatively and in determining step (3) pressure sensor 8 detect each time and whether the system low-voltage pressure P d that feeds back is greater than predefined reference pressure value P0 in the program of controller:
If a. low pressure Pd is greater than reference pressure value P0, i.e. Pd > P0, the second control valve 62 keeps closed conditions, now in gas side line 10, does not supplement gaseous coolant amount;
If b. low pressure Pd is less than or equal to reference pressure value P0, i.e. Pd≤P0, controller is controlled the second control valve 62 and is opened, and refers to Fig. 2, and now, the gaseous coolant of fluid reservoir 7 interior outflows flows into gas side line 10 and compressor 1, to increase the low pressure Pd of system; When the low pressure Pd of system is greater than reference pressure value P0, during Pd > P0, controller controls the second control valve 62 and recovers to cut out;
(5) repeat above-mentioned steps (3), (4) until defrost process finishes, controller is controlled the first control valve 61, the second control valve 62 is all closed.
The intelligent defrosting air-conditioning system that the utility model embodiment mono-provides supplements to low-pressure side the object that gaseous coolant reaches supercharging in time according to actual pressure situation, when guaranteeing effectively defrosting, avoid liquid refrigerant stream to return in compressor 1 and cause liquid hit phenomenon, improved the security of air-conditioning system, its control is accurate, easy and simple to handle.
Embodiment bis-
Refer to Fig. 4, the difference of the present embodiment and embodiment mono-is: on fluid reservoir 7, also further have additional the refrigerant heater 9 of being controlled, being heated for the refrigerant in fluid reservoir 7 by controller.When the gaseous coolant of fluid reservoir 7 is not enough, gaseous coolant regulates the pipeline 70 will insufficient pressure so, also just cannot be to the supercharging of gas side line and the low pressure Pd of Hoisting System after the second control valve 62 is opened, this Time Controller can start 7 heating of 9 pairs of fluid reservoirs of refrigerant heater in time according to the pressure condition of pressure sensor feedback, the liquid refrigerants endothermic gasification that makes to store in the inner regulates the pressure in pipeline 70 to strengthen gaseous coolant, thereby promote better the low pressure Pd in gas side line, avoid it lower than reference pressure value P0.And the refrigerant heater 9 at this place be take and selected electrothermal heater or electromagnetic heater as good, be not only easy to realize, also convenient control.And other 26S Proteasome Structure and Function principle of the present embodiment is identical with embodiment mono-, repeat no more herein.
Basic identical in the job step of the intelligent defrosting air-conditioning system of the embodiment bis-that the utility model provides and embodiment mono-, having some difference is exactly to increase a control procedure to refrigerant heater, is specially:
The operating procedure providing at embodiment mono-also comprises the steps: in (4)
If a. low pressure Pd is greater than reference pressure value P0, i.e. Pd > P0, refrigerant heater 9 keeps off-positions, and now refrigerant heater 9 is not worked, to the interior refrigerant heating of fluid reservoir 7;
If b. low pressure Pd is less than or equal to reference pressure value P0, be Pd≤P0, the 9 energising unlatching work of refrigerant heater are to the interior refrigerant heating of fluid reservoir 7, be vaporized and increase pressure, when the low pressure Pd of system is greater than reference pressure value P0, while being Pd > P0, refrigerant heater 9 recovers off-position;
In sum, the intelligent defrosting air-conditioning system that the utility model embodiment bis-provides is by detecting the low pressure of low-pressure side in the process in defrosting, according to actual pressure situation, to low-pressure side, supplement the object that gaseous coolant reaches supercharging in time, when guaranteeing effectively defrosting, avoid liquid refrigerant stream to return in compressor 1 and cause liquid hit phenomenon, improved the security of air-conditioning system, its control is accurate, easy and simple to handle.
Embodiment tri-
Refer to Fig. 5, the difference of the present embodiment and embodiment mono-is: gaseous coolant regulates pipeline 70 tunnels and liquid refrigerants to regulate on the gas side line 10 between pipeline 71 tunnels and has additional gas-liquid separator 11.This gas-liquid separator 11 can prevent that liquid refrigerants from entering compressor 1 from the return-air side of compressor 1, and only allows gaseous coolant enter in compressor 1, prevents that compressor 1 from producing liquid hit phenomenon.The security performance of system is further promoted.And other 26S Proteasome Structure and Function principle of the present embodiment is identical with embodiment mono-, repeat no more herein.
Identical with embodiment mono-of the job step of the intelligent defrosting air-conditioning system that the utility model embodiment tri-provides, also be no longer repeated in this description herein, first flowing into gas-liquid separator 12, the gaseous coolant just flowing out from fluid reservoir 7 tops flows to again compressor 1, both can guarantee when effectively defrosting, can avoid again liquid refrigerant stream to return compressor 1 and cause liquid hit phenomenon, its reliability is higher.
Embodiment tetra-
Refer to Fig. 6, the difference of the present embodiment and embodiment bis-is: gaseous coolant regulates pipeline 70 tunnels and liquid refrigerants to regulate on the gas side line 10 between pipeline 71 tunnels and has additional gas-liquid separator 11.This gas-liquid separator 11 can prevent that liquid refrigerants from entering compressor 1 from the return-air side of compressor 1, and only allows gaseous coolant enter in compressor 1, prevents that compressor 1 from producing liquid hit phenomenon.The security performance of system is further promoted.And other 26S Proteasome Structure and Function principle of the present embodiment is identical with embodiment bis-, repeat no more herein.
Identical with embodiment bis-of the job step of the intelligent defrosting air-conditioning system that the utility model embodiment tetra-provides, also be no longer repeated in this description herein, first flowing into gas-liquid separator 12, the gaseous coolant just flowing out from fluid reservoir 7 tops flows to again compressor 1, both can guarantee when effectively defrosting, can avoid again liquid refrigerant stream to return compressor 1 and cause liquid hit phenomenon, its reliability, security are higher.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims (8)

1. an intelligent defrosting air-conditioning system, comprises by pipeline and connects the refrigerant circulation circuit of at least one compressor, reversal valve, outdoor heat exchanger, throttle part, indoor heat exchanger formation and control the controller that air-conditioning system is moved; It is characterized in that:
Pipeline between described outdoor heat exchanger and described throttle part is also connected with a refrigerant and regulates bypass branch road, described refrigerant regulates on bypass branch road and is serially connected with in turn the first control valve of being controlled by described controller and a fluid reservoir, is connected with a gaseous coolant and regulates pipeline on described fluid reservoir;
Described gaseous coolant regulates pipeline to be connected with the air entry of described compressor by gas side line, and this gaseous coolant regulates pipeline to be provided with second control valve of being controlled by described controller;
On described gas side line, near the air entry place of described compressor, be also provided with a pressure sensor, for detection of the low pressure of system and by this low pressure signal feedback to controller.
2. intelligent defrosting air-conditioning system as claimed in claim 1, it is characterized in that: described reversal valve is cross valve, the D mouth of pipe of described cross valve, the E mouth of pipe, the S mouth of pipe and the C mouth of pipe are connected respectively the air entry of the exhaust outlet of described compressor, described indoor heat exchanger, described compressor, described outdoor heat exchanger.
3. intelligent defrosting air-conditioning system as claimed in claim 2, is characterized in that: on described fluid reservoir, be also provided with the refrigerant heater of being controlled, being heated for the refrigerant in described fluid reservoir by described controller.
4. the intelligent defrosting air-conditioning system as described in claims 1 to 3 any one, is characterized in that: on described gas side line, be also provided with a gas-liquid separator, and described low pressure sensor is on the pipeline between described gas-liquid separator and described compressor.
5. intelligent defrosting air-conditioning system as claimed in claim 4, is characterized in that: described throttle part is a kind of in capillary, electric expansion valve, heating power expansion valve.
6. intelligent defrosting air-conditioning system as claimed in claim 4, is characterized in that: described the first control valve is magnetic valve or electric expansion valve.
7. intelligent defrosting air-conditioning system as claimed in claim 4, is characterized in that: described the second control valve is magnetic valve or electric expansion valve.
8. intelligent defrosting air-conditioning system as claimed in claim 4, is characterized in that: on the high-pressure liquid tube pipeline being connected with described indoor heat exchanger and low pressure gas pipe pipeline, be also respectively equipped with a stop valve.
CN201320461306.8U 2013-07-30 2013-07-30 Intelligent defrosting air-conditioning system Expired - Fee Related CN203454507U (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104654679A (en) * 2015-02-12 2015-05-27 珠海格力电器股份有限公司 Condensing system, air-cooled air conditioning system and control method
CN104879940A (en) * 2015-05-14 2015-09-02 珠海格力电器股份有限公司 Air-conditioner system and control method thereof
CN105627530A (en) * 2014-11-07 2016-06-01 青岛海尔空调电子有限公司 Variable frequency air conditioner and control method thereof
CN107152820A (en) * 2017-06-19 2017-09-12 青岛海尔空调器有限总公司 A kind of air conditioner and its control method
CN109405233A (en) * 2018-10-08 2019-03-01 珠海格力电器股份有限公司 Control equipment, method, air-conditioning and the storage medium of air-conditioning
CN110173794A (en) * 2019-05-27 2019-08-27 广东美的制冷设备有限公司 Air conditioner and its control method and device
CN111271823A (en) * 2019-12-18 2020-06-12 宁波奥克斯电气股份有限公司 Control method for preventing defrosting liquid return of air conditioner and air conditioner
CN112413947A (en) * 2020-11-11 2021-02-26 珠海格力电器股份有限公司 Defrosting assembly, air conditioning system and control method of air conditioning system
CN114459178A (en) * 2022-03-29 2022-05-10 重庆美的通用制冷设备有限公司 Heat exchange unit and air conditioning equipment
CN115127195A (en) * 2022-07-19 2022-09-30 广东欧科空调制冷有限公司 Method for controlling superheat degree of multi-connected air conditioner in defrosting process
WO2023071295A1 (en) * 2021-10-29 2023-05-04 青岛海尔空调电子有限公司 Heat pump system, and method and apparatus for controlling heat pump system

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105627530A (en) * 2014-11-07 2016-06-01 青岛海尔空调电子有限公司 Variable frequency air conditioner and control method thereof
CN104654679A (en) * 2015-02-12 2015-05-27 珠海格力电器股份有限公司 Condensing system, air-cooled air conditioning system and control method
CN104879940A (en) * 2015-05-14 2015-09-02 珠海格力电器股份有限公司 Air-conditioner system and control method thereof
CN107152820B (en) * 2017-06-19 2020-05-29 青岛海尔空调器有限总公司 Air conditioner and control method thereof
CN107152820A (en) * 2017-06-19 2017-09-12 青岛海尔空调器有限总公司 A kind of air conditioner and its control method
CN109405233A (en) * 2018-10-08 2019-03-01 珠海格力电器股份有限公司 Control equipment, method, air-conditioning and the storage medium of air-conditioning
CN109405233B (en) * 2018-10-08 2024-01-26 珠海格力电器股份有限公司 Control device and method for air conditioner, air conditioner and storage medium
CN110173794A (en) * 2019-05-27 2019-08-27 广东美的制冷设备有限公司 Air conditioner and its control method and device
CN111271823A (en) * 2019-12-18 2020-06-12 宁波奥克斯电气股份有限公司 Control method for preventing defrosting liquid return of air conditioner and air conditioner
CN111271823B (en) * 2019-12-18 2021-06-04 宁波奥克斯电气股份有限公司 Control method for preventing defrosting liquid return of air conditioner and air conditioner
CN112413947A (en) * 2020-11-11 2021-02-26 珠海格力电器股份有限公司 Defrosting assembly, air conditioning system and control method of air conditioning system
WO2023071295A1 (en) * 2021-10-29 2023-05-04 青岛海尔空调电子有限公司 Heat pump system, and method and apparatus for controlling heat pump system
CN114459178A (en) * 2022-03-29 2022-05-10 重庆美的通用制冷设备有限公司 Heat exchange unit and air conditioning equipment
CN114459178B (en) * 2022-03-29 2023-08-29 重庆美的通用制冷设备有限公司 Heat exchange unit and air conditioning equipment
CN115127195A (en) * 2022-07-19 2022-09-30 广东欧科空调制冷有限公司 Method for controlling superheat degree of multi-connected air conditioner in defrosting process

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Granted publication date: 20140226

Termination date: 20190730