CN110645675A - Improved defrosting control method for air conditioner - Google Patents
Improved defrosting control method for air conditioner Download PDFInfo
- Publication number
- CN110645675A CN110645675A CN201910896612.6A CN201910896612A CN110645675A CN 110645675 A CN110645675 A CN 110645675A CN 201910896612 A CN201910896612 A CN 201910896612A CN 110645675 A CN110645675 A CN 110645675A
- Authority
- CN
- China
- Prior art keywords
- turning
- equal
- tod
- air conditioner
- less
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to an improved defrosting control method of an air conditioner, which comprises the steps that an outdoor temperature sensor is arranged beside an outdoor heat exchanger of the air conditioner so as to detect the outdoor environment temperature; an outdoor temperature sensor is arranged on a middle disc of the outdoor heat exchanger so as to detect the temperature of the middle part of the indoor heat exchanger; the control method judges whether the air conditioner is in abnormal shutdown state or not by detecting the outdoor environment temperature, the outdoor unit heat exchanger temperature, the accumulated running time of the compressor and the like, so that the unit accurately enters a corresponding defrosting program, thereby effectively preventing the icing condition of the air conditioner outdoor unit heat exchanger and ensuring the stable and reliable running of the air conditioner.
Description
Technical Field
The invention relates to an air conditioner control method, in particular to an air conditioner defrosting control method, and specifically relates to an improved air conditioner defrosting control method.
Background
In the existing air conditioner defrosting control, the judgment and the action are only carried out when the air conditioner enters the defrosting mode from the normal heating mode. However, during the actual use process, the air conditioner is often suddenly stopped during the heating operation, including the situations of power-off stop, error switching mode stop or user remote control stop. At this moment, obvious frost layer is formed on the surface of the outdoor heat exchanger, the frost layer can be slowly melted into ice-water mixture after the outdoor heat exchanger is shut down, at this moment, if the outdoor heat exchanger is continuously started to operate, water on the surface of the heat exchanger can be quickly frozen, the ice layer can be accumulated to be thick when the frost layer is melted for the next time, the defrosting time is greatly prolonged, the using effect of a user is influenced, and the risk of liquid impact and oil return difficulty of the compressor can be caused. Therefore, improvements are urgently needed.
Disclosure of Invention
The invention aims to provide an improved air conditioner defrosting control method aiming at the defects of the prior art, which can judge and enter a defrosting program in time after the air conditioner is shut down in an abnormal state, thereby effectively preventing the heat exchanger of an air conditioner outdoor unit from being frozen and ensuring the stable and reliable operation of the air conditioner.
The technical scheme of the invention is as follows:
an improved defrosting control method for an air conditioner comprises the steps that an outdoor temperature sensor is arranged beside an outdoor heat exchanger of the air conditioner so as to detect the outdoor environment temperature; an outdoor temperature sensor is arranged on a center plate of the outdoor heat exchanger so as to detect the temperature of the middle part of the indoor heat exchanger.
The control method comprises the following steps:
1) the air conditioner operates, and the current state of the air conditioner is determined: if the operation is normal, turning to the step 2); if the power is obtained after the power is cut off in the heating operation, turning to the step 5); if the heating mode is switched to the non-heating mode, switching to the step 8); if receiving the user remote control shutdown in the heating mode, turning to step 11);
2) detecting outdoor environment temperature TOd and outdoor heat exchanger middle temperature TO, and counting the accumulated running time ti of the compressor; if TOd is more than Ta, turning to step 3): if TOd is less than or equal to Ta, turning to the step 4);
3) if the following conditions are met simultaneously: TO is less than Tb2, the duration is more than or equal TO tk2, ti is more than or equal TO ti3, and go TO step 14); otherwise, turning to the step 2);
4) if the following conditions are met simultaneously: turning TO step 14) until TOd-TO is more than or equal TO Tm3, the duration is more than or equal TO tk3, and ti is more than or equal TO ti 3; otherwise, turning to the step 2);
5) detecting outdoor environment temperature TOd and the middle temperature TO of the outdoor heat exchanger; if TOd is more than Ta, turning to step 6): if TOd is less than or equal to Ta, turning to step 7);
6) if TO is less than Tb2 and the duration is more than or equal TO tk2, go TO step 14); otherwise, turning to the step 5);
7) if TOd-TO is not less than Tm3 and the duration is not less than tk3, go TO step 14); otherwise, turning to the step 5);
8) detecting outdoor environment temperature TOd and outdoor heat exchanger middle temperature TO, and counting the accumulated running time ti of the compressor; if ti is not less than 1 and is less than ti2, turning to step 9); if ti2 is not more than ti, turning to step 10); otherwise, go to step 17);
9) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm1, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then the step 15 is carried out; otherwise go to step 17);
10) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm2, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then the step 15 is carried out; otherwise go to step 17);
11) detecting outdoor environment temperature TOd and outdoor heat exchanger middle temperature TO, and counting the accumulated running time ti of the compressor; if ti is not less than 1 and is less than ti2, turning to step 12); if ti2 is not more than ti, turning to step 13); otherwise, go to step 18);
12) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm1, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then step 16) is carried out; otherwise, go to step 18);
13) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm2, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then step 16) is carried out; otherwise, go to step 18);
14) defrosting, and turning to the step 1) after defrosting is finished;
15) defrosting is carried out, and the step 17 is carried out after defrosting is finished);
16) defrosting is carried out, and step 18) is carried out after defrosting is finished;
17) converting into a user setting mode;
18) the machine set is shut down;
wherein ti1, ti2 and ti3 are the compressor target cumulative operating time; tm1, Tm2 and Tm3 are the target temperature difference between the outdoor environment temperature and the heat exchanger coil; tk1, tk2, and tk3 are cumulative times; tb1 and Tb2 are outdoor heat exchanger coil target temperatures; ta is the outdoor environment temperature interval value.
Further, ti1 is 5 ~ 15min, ti2 is 15 ~ 45min, and ti3 is 25 ~ 80 min.
Further, Tm1 is 5 ℃ ~ 20 ℃, Tm2 is 5 ℃ ~ 20 ℃ and Tm3 is 5 ℃ ~ 20 ℃.
Further, tk1 is 2 ~ 8min, tk2 is 2 ~ 8min, and tk3 is 2 ~ 8 min.
Further, Tb1 was-10 ℃ ~ 2 ℃ and Tb2 was-10 ℃ ~ 2 ℃.
Further, Ta is 0 ℃ ~ 5 ℃.
The invention has the beneficial effects that:
the invention has reasonable design, clear logic and convenient control, and can accurately enter the corresponding defrosting program after the air conditioner is shut down in an abnormal state and the like, thereby effectively preventing the heat exchanger of the outdoor unit of the air conditioner from freezing and ensuring the stable and reliable operation of the air conditioner.
Detailed Description
The present invention will be further described with reference to the following examples.
An improved defrosting control method for an air conditioner comprises the steps that an outdoor temperature sensor is arranged beside an outdoor heat exchanger of the air conditioner so as to detect the outdoor environment temperature; an outdoor temperature sensor is arranged on a center plate of the outdoor heat exchanger so as to detect the temperature of the middle part of the indoor heat exchanger. The control method comprises the following steps:
1) the air conditioner operates, and the current state of the air conditioner is determined: if the operation is normal, turning to the step 2); if the power is obtained after the power is cut off in the heating operation, turning to the step 5); if the heating mode is switched to the non-heating mode, switching to the step 8); if receiving the user remote control shutdown in the heating mode, turning to step 11); if the air conditioner electric control board is detected to be initialized, determining that the power is on after power failure; if the initialization of the air conditioner electric control board is not detected, the normal operation is determined;
2) detecting outdoor environment temperature TOd and outdoor heat exchanger middle temperature TO, and counting the accumulated running time ti of the compressor; if TOd is more than Ta, turning to step 3): if TOd is less than or equal to Ta, turning to the step 4);
3) if the following conditions are met simultaneously: TO is less than Tb2, the duration is more than or equal TO tk2, ti is more than or equal TO ti3, and go TO step 14); otherwise, turning to the step 2);
4) if the following conditions are met simultaneously: turning TO step 14) until TOd-TO is more than or equal TO Tm3, the duration is more than or equal TO tk3, and ti is more than or equal TO ti 3; otherwise, turning to the step 2);
5) detecting outdoor environment temperature TOd and the middle temperature TO of the outdoor heat exchanger; if TOd is more than Ta, turning to step 6): if TOd is less than or equal to Ta, turning to step 7);
6) if TO is less than Tb2 and the duration is more than or equal TO tk2, go TO step 14); otherwise, turning to the step 5);
7) if TOd-TO is not less than Tm3 and the duration is not less than tk3, go TO step 14); otherwise, turning to the step 5);
8) detecting outdoor environment temperature TOd and outdoor heat exchanger middle temperature TO, and counting the accumulated running time ti of the compressor; if ti is not less than 1 and is less than ti2, turning to step 9); if ti2 is not more than ti, turning to step 10); otherwise, go to step 17);
9) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm1, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then the step 15 is carried out; otherwise go to step 17);
10) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm2, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then the step 15 is carried out; otherwise go to step 17);
11) detecting outdoor environment temperature TOd and outdoor heat exchanger middle temperature TO, and counting the accumulated running time ti of the compressor; if ti is not less than 1 and is less than ti2, turning to step 12); if ti2 is not more than ti, turning to step 13); otherwise, go to step 18);
12) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm1, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then step 16) is carried out; otherwise, go to step 18);
13) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm2, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then step 16) is carried out; otherwise, go to step 18);
14) defrosting, and turning to the step 1) after defrosting is finished;
15) defrosting is carried out, and the step 17 is carried out after defrosting is finished);
16) defrosting is carried out, and step 18) is carried out after defrosting is finished;
17) converting into a user setting mode;
18) the unit is shut down.
Wherein ti1, ti2 and ti3 are the target accumulated running time of the compressor, ti1 is 5 ~ 15min, ti2 is 15 ~ 45min, and ti3 is 25 ~ 80 min.
Tm1, Tm2 and Tm3 are the target temperature difference between the outdoor environment temperature and the heat exchanger coil, and Tm1 is 5 ℃ ~ 20 ℃, Tm2 is 5 ℃ ~ 20 ℃, and Tm3 is 5 ℃ ~ 20 ℃.
tk1, tk2 and tk3 are cumulative times, and tk1 is 2 ~ 8min, tk2 is 2 ~ 8min, tk3 is 2 ~ 8 min.
Tb1 and Tb2 are the target temperatures of the coil of the outdoor heat exchanger, Tb1 is-10 ℃ ~ 2 ℃, and Tb2 is-10 ℃ ~ 2 ℃.
Ta is the outdoor ring temperature interval value and is 0 ℃ ~ 5 ℃.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (6)
1. An improved defrosting control method for an air conditioner comprises the steps that an outdoor temperature sensor is arranged beside an outdoor heat exchanger of the air conditioner so as to detect the outdoor environment temperature; an outdoor temperature sensor is arranged on a middle disc of the outdoor heat exchanger so as to detect the temperature of the middle part of the indoor heat exchanger; the method is characterized in that: the control method comprises the following steps:
1) the air conditioner operates, and the current state of the air conditioner is determined: if the operation is normal, turning to the step 2); if the power is obtained after the power is cut off in the heating operation, turning to the step 5); if the heating mode is switched to the non-heating mode, switching to the step 8); if receiving the user remote control shutdown in the heating mode, turning to step 11);
2) detecting outdoor environment temperature TOd and outdoor heat exchanger middle temperature TO, and counting the accumulated running time ti of the compressor; if TOd is more than Ta, turning to step 3): if TOd is less than or equal to Ta, turning to the step 4);
3) if the following conditions are met simultaneously: TO is less than Tb2, the duration is more than or equal TO tk2, ti is more than or equal TO ti3, and go TO step 14); otherwise, turning to the step 2);
4) if the following conditions are met simultaneously: turning TO step 14) until TOd-TO is more than or equal TO Tm3, the duration is more than or equal TO tk3, and ti is more than or equal TO ti 3; otherwise, turning to the step 2);
5) detecting outdoor environment temperature TOd and the middle temperature TO of the outdoor heat exchanger; if TOd is more than Ta, turning to step 6): if TOd is less than or equal to Ta, turning to step 7);
6) if TO is less than Tb2 and the duration is more than or equal TO tk2, go TO step 14); otherwise, turning to the step 5);
7) if TOd-TO is not less than Tm3 and the duration is not less than tk3, go TO step 14); otherwise, turning to the step 5);
8) detecting outdoor environment temperature TOd and outdoor heat exchanger middle temperature TO, and counting the accumulated running time ti of the compressor; if ti is not less than 1 and is less than ti2, turning to step 9); if ti2 is not more than ti, turning to step 10); otherwise, go to step 17);
9) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm1, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then the step 15 is carried out; otherwise go to step 17);
10) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm2, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then the step 15 is carried out; otherwise go to step 17);
11) detecting outdoor environment temperature TOd and outdoor heat exchanger middle temperature TO, and counting the accumulated running time ti of the compressor; if ti is not less than 1 and is less than ti2, turning to step 12); if ti2 is not more than ti, turning to step 13); otherwise, go to step 18);
12) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm1, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then step 16) is carried out; otherwise, go to step 18);
13) if the following conditions are met simultaneously: TOd-TO is more than or equal TO Tm2, TO is less than Tb1, and the accumulated temperature difference time is more than or equal TO tk1, and then step 16) is carried out; otherwise, go to step 18);
14) defrosting, and turning to the step 1) after defrosting is finished;
15) defrosting is carried out, and the step 17 is carried out after defrosting is finished);
16) defrosting is carried out, and step 18) is carried out after defrosting is finished;
17) converting into a user setting mode;
18) the machine set is shut down;
wherein ti1, ti2 and ti3 are the compressor target cumulative operating time; tm1, Tm2 and Tm3 are the target temperature difference between the outdoor environment temperature and the heat exchanger coil; tk1, tk2, and tk3 are cumulative times; tb1 and Tb2 are outdoor heat exchanger coil target temperatures; ta is the outdoor environment temperature interval value.
2. The improved defrosting control method of an air conditioner as claimed in claim 1, wherein ti1 is 5 ~ 15min, ti2 is 15 ~ 45min, and ti3 is 25 ~ 80 min.
3. The improved defrosting control method for an air conditioner as claimed in claim 1, wherein Tm1 is 5 ℃ ~ 20 ℃, Tm2 is 5 ℃ ~ 20 ℃ and Tm3 is 5 ℃ ~ 20 ℃.
4. The improved defrosting control method of an air conditioner as set forth in claim 1, wherein tk1 is 2 ~ 8min, tk2 is 2 ~ 8min, and tk3 is 2 ~ 8 min.
5. The improved defrosting control method of an air conditioner according to claim 1, wherein Tb1 is-10 ℃ ~ 2 ℃, Tb2 is-10 ℃ ~ 2 ℃.
6. The improved defrosting control method of an air conditioner as set forth in claim 1, wherein Ta is 0 ℃ ~ 5 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910896612.6A CN110645675B (en) | 2019-09-23 | 2019-09-23 | Improved defrosting control method for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910896612.6A CN110645675B (en) | 2019-09-23 | 2019-09-23 | Improved defrosting control method for air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110645675A true CN110645675A (en) | 2020-01-03 |
| CN110645675B CN110645675B (en) | 2021-02-02 |
Family
ID=68992451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910896612.6A Active CN110645675B (en) | 2019-09-23 | 2019-09-23 | Improved defrosting control method for air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110645675B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010047646A (en) * | 1999-11-22 | 2001-06-15 | 황한규 | Method for defrosting operation of air-conditioner used both cooler and heater |
| CN102538126A (en) * | 2010-12-24 | 2012-07-04 | 中国扬子集团滁州扬子空调器有限公司 | Defrosting control method of heat-pump type air conditioner |
| CN102878737A (en) * | 2012-10-10 | 2013-01-16 | 南京天加空调设备有限公司 | Method for implementing normal heating of indoor units of modular multi-unit device during defrosting |
| CN104019593A (en) * | 2013-02-28 | 2014-09-03 | 广东美的制冷设备有限公司 | Defrosting method of air conditioner |
| CN106705302A (en) * | 2017-01-10 | 2017-05-24 | 美的集团武汉制冷设备有限公司 | Air conditioner, defrosting control method and defrosting control system |
| CN106989488A (en) * | 2017-04-17 | 2017-07-28 | 广东美的制冷设备有限公司 | The defrosting control method and system of air conditioner and air conditioner |
| CN107449105A (en) * | 2017-07-05 | 2017-12-08 | 青岛海尔空调器有限总公司 | A kind of control method of air-conditioner defrosting |
| CN108286775A (en) * | 2017-12-29 | 2018-07-17 | 广东高而美制冷设备有限公司 | It is a kind of that there is waste heat recovery and anti-freeze defrosting control method |
| CN109357440A (en) * | 2018-10-26 | 2019-02-19 | 宁波奥克斯电气股份有限公司 | A kind of multi-connected machine heating method for controlling oil return and multi-gang air-conditioner device |
-
2019
- 2019-09-23 CN CN201910896612.6A patent/CN110645675B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010047646A (en) * | 1999-11-22 | 2001-06-15 | 황한규 | Method for defrosting operation of air-conditioner used both cooler and heater |
| CN102538126A (en) * | 2010-12-24 | 2012-07-04 | 中国扬子集团滁州扬子空调器有限公司 | Defrosting control method of heat-pump type air conditioner |
| CN102878737A (en) * | 2012-10-10 | 2013-01-16 | 南京天加空调设备有限公司 | Method for implementing normal heating of indoor units of modular multi-unit device during defrosting |
| CN104019593A (en) * | 2013-02-28 | 2014-09-03 | 广东美的制冷设备有限公司 | Defrosting method of air conditioner |
| CN106705302A (en) * | 2017-01-10 | 2017-05-24 | 美的集团武汉制冷设备有限公司 | Air conditioner, defrosting control method and defrosting control system |
| CN106989488A (en) * | 2017-04-17 | 2017-07-28 | 广东美的制冷设备有限公司 | The defrosting control method and system of air conditioner and air conditioner |
| CN107449105A (en) * | 2017-07-05 | 2017-12-08 | 青岛海尔空调器有限总公司 | A kind of control method of air-conditioner defrosting |
| CN108286775A (en) * | 2017-12-29 | 2018-07-17 | 广东高而美制冷设备有限公司 | It is a kind of that there is waste heat recovery and anti-freeze defrosting control method |
| CN109357440A (en) * | 2018-10-26 | 2019-02-19 | 宁波奥克斯电气股份有限公司 | A kind of multi-connected machine heating method for controlling oil return and multi-gang air-conditioner device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110645675B (en) | 2021-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104833167A (en) | Air cooling refrigerator defrosting method | |
| US20190271495A1 (en) | Air conditioner, and device and method for preventing cold air during heating of air conditioner | |
| CN105004000B (en) | Defrosting control method during inverter air conditioner heating operation | |
| CA3057238A1 (en) | Method for controlling window air conditioner | |
| JP5306007B2 (en) | Air conditioner | |
| CN109990439B (en) | Control method and control device for abnormal reversing of air conditioner four-way valve and air conditioner | |
| US10345022B2 (en) | Air-conditioning apparatus | |
| CN109612054B (en) | Deicing control method for chassis of outdoor unit of air conditioner | |
| CN102538126B (en) | Defrosting control method of heat-pump type air conditioner | |
| CN106152641B (en) | Air-conditioning refrigerator accurately defrosts intelligent control method and system | |
| CN106765950A (en) | The control method of air-conditioning heating system, control device and air-conditioner | |
| CN109654678B (en) | Defrosting control method for air conditioner | |
| CN102012138A (en) | Air conditioner and method for controlling same to defrost | |
| JP2010210223A (en) | Air conditioner | |
| CN101871684A (en) | Defrosting control method of air conditioner | |
| WO2020098389A1 (en) | Heating and defrosting control method and system for air conditioner outdoor unit | |
| CN110645675B (en) | Improved defrosting control method for air conditioner | |
| CN109237734B (en) | Heating control method for chassis of air conditioner outdoor unit | |
| CN109751714B (en) | Air conditioner defrosting control method and air conditioner | |
| KR100497159B1 (en) | Air conditioner and method of defrosting thereof | |
| CN113483407B (en) | Control method, device and system of PTC electric heater and air conditioner | |
| WO2022174842A1 (en) | Air conditioner and defrosting control method therefor | |
| US10830483B2 (en) | Refrigeration cycle apparatus | |
| CN114046591A (en) | Control method for household water machine | |
| CN103423838A (en) | Defrosting control method for heat-pump 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |