CN104791954A - Control method and system for defrosting judgment of air conditioner - Google Patents
Control method and system for defrosting judgment of air conditioner Download PDFInfo
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- CN104791954A CN104791954A CN201510182234.7A CN201510182234A CN104791954A CN 104791954 A CN104791954 A CN 104791954A CN 201510182234 A CN201510182234 A CN 201510182234A CN 104791954 A CN104791954 A CN 104791954A
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- 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
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- 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
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- 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
-
- 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
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- 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
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- 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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a control method and system for defrosting judgment of an air conditioner. The control method for defrosting judgment of the air conditioner comprises the following steps that S1, the continuous operation time T in a heating mode state is collected; S2, whether the continuous operation time T is lager than or equal to a target time T1 is judged, the step S3 is executed if yes, and the step S1 is executed again if not; S3, whether the current temperature Tt of a condenser coiler is smaller than a target temperature Ta or not is judged, the step S4 is executed if yes, and the step S2 is executed again if not; S4, operation in the defrosting mode is controlled according to the dropping speed of the temperature of the condenser coiler. According to the control method and system for defrosting judgment of the air conditioner, whether defrosting is needed for a condenser or not is judged by dynamically acquiring the dropping speed of the temperature of the condenser coiler, the thickness of a frost layer can be intelligently and accurately reflected by the dropping speed of the temperature of the condenser coiler, and the problems that due to the fact that the defrosting mode is started frequently, the heating effect of the air conditioner is affected, fluctuation of the indoor temperature is caused, and use comfort is affected are solved.
Description
Technical field
The present invention relates to air-conditioner controller field, the control method of particularly a kind of air-conditioner defrosting judgement and system.
Background technology
When air-conditioning heats at low temperatures, the coil pipe of condenser can produce frost, the heating effect of air-conditioning can be affected, at this moment need to enter the defrosting of defrost mode operation.The defrosting that current air-conditioning adopts mostly judges that control method judges that condenser is the need of defrosting by the acquisition method of heating operation certain hour detection condenser coil temperature or this static state of outdoor environment temperature value, the drawback of this control method is exactly under low temperature and low humidity degree, the ambient temperature value detected and condenser coil temperature are very low, but when the very thin not even frosting of frost layer, also defrost action is entered, this judgement is very inaccurate, air-conditioning frequently can enter defrost, affect the heating effect of air-conditioning, cause the fluctuation of indoor temperature, the comfortableness that impact uses.
Summary of the invention
The invention provides control method and the system of the judgement of a kind of air-conditioner defrosting, frequently enter defrost to solve above-mentioned air-conditioner defrosting control method, affect the heating effect of air-conditioning, cause the fluctuation of indoor temperature, the technical problem of the comfortableness that impact uses.
In order to solve the problems of the technologies described above, the invention provides the control method that a kind of air-conditioner defrosting judges, comprising the following steps:
Step S1, gathers the continuous operating time T under heating mode state;
Step S2, judges whether described continuous operating time T is more than or equal to object time T1, if so, performs step S3; Otherwise return step S1;
Step S3, judges whether condenser coil Current Temperatures Tt is less than target temperature Ta, if so, performs step S4; Otherwise return step S2;
Step S4, controls the operation of defrost pattern according to the decrease speed of condenser coil temperature.
The invention has the beneficial effects as follows: judge that condenser is the need of defrosting by the dynamic collecting method of the decrease speed according to condenser coil temperature, the decrease speed of condenser coil temperature can intelligence, reflect the thickness of frost layer accurately, avoid frequently entering defrost, affect the heating effect of air-conditioning, cause the fluctuation of indoor temperature, the comfortableness that impact uses; First judge whether described continuous operating time T is more than or equal to object time T1 simultaneously, avoid air-conditioning in starting up's stage, condenser coil temperature change affects greatly the erroneous judgement of the decrease speed of condenser coil temperature.
Further, described step S4 specifically comprises,
Step S41, gathers set time T2 inner condenser coil pipe initial temperature Tt1 and condenser coil final temperature Tt2;
Step S42, judges, in described set time T2, whether the decrease speed S of described condenser coil temperature is greater than pre-set velocity value S1, if so, runs defrost pattern; Otherwise return step S41.
The beneficial effect of above-mentioned further scheme is adopted to be: by arranging in rational time T2, detect condenser coil initial temperature Tt1 and condenser coil final temperature Tt2, whether the decrease speed S calculating condenser coil temperature by condenser coil initial temperature Tt1 and condenser coil final temperature Tt2 reaches the pre-set velocity value S1 of defrosting, improves the accuracy and efficiency of defrosting.
Further, in described step S42, the computing formula of the decrease speed S of condenser coil temperature is: S=(Tt1-Tt2)/T2.
The beneficial effect of above-mentioned further scheme is adopted to be: when air-conditioning heats at low temperatures, condenser coil temperature can continue to reduce, Tt1 is the maximum of T2 time inner condenser coil temperature, Tt2 is the minimum of a value of T2 time inner condenser coil temperature, by this formula, the decrease speed S of condenser coil temperature accurately can reflect the actual decrease speed of condenser coil temperature.
Further, described object time T1 is 30min to 40min.
Adopt the beneficial effect of above-mentioned further scheme to be: when air-conditioning heating mode operation is to 30min to 40min time, the condenser of air-conditioning is in metastable duty, condenser coil Current Temperatures Tt is relatively more accurate, avoids erroneous judgement.
Further, described target temperature Ta is 0 DEG C.
The beneficial effect of above-mentioned further scheme is adopted to be: when the condenser coil temperature of air-conditioning is at about 0 DEG C, condenser coil just can produce frost, improves the accuracy of air-conditioning defrost.
Further, described pre-set velocity value S1 be 0.1 DEG C/min to 0.2 DEG C/min.
Adopt the beneficial effect of above-mentioned further scheme to be: when the pre-set velocity value S1 of the condenser coil temperature decrease speed of air-conditioning be 0.1 DEG C/min to 0.2 DEG C/min, during this time defrost, the frosting just eliminating condenser coil is thicker and affect the heating effect of air-conditioning, improves the thermal conversion efficiency of air-conditioning.
Further, described set time T2 is 50s to 15min.
The beneficial effect of above-mentioned further scheme is adopted to be: by arranging different set time T2, meet the detection time of the condenser coil temperature decrease speed under different capacity heating mode, also avoid overlong time and make condenser coil frosting thicker simultaneously.
Further, described set time T2 is 10min.
The beneficial effect of above-mentioned further scheme is adopted to be: arranging set time T2 is 10min, while meeting defrosting effect, avoids system frequently to defrost.
The present invention also provides a kind of air-conditioner defrosting to judge control system, comprises the first acquisition module, the first judge module, the second judge module and defrost mode control module,
Described first acquisition module, for gathering the continuous operating time T under heating mode state;
Described first judge module, for judging whether described continuous operating time T is more than or equal to object time T1, if so, calls described second judge module; Otherwise call described first acquisition module;
Described second judge module, for judging whether condenser coil Current Temperatures Tt is less than target temperature Ta, if so, calls described defrost mode control module; Otherwise call described first judge module;
Described defrost mode control module, for controlling the operation of defrost pattern according to the decrease speed of condenser coil temperature.
Air-conditioner defrosting of the present invention judges that the beneficial effect of control system is: judge whether condenser coil Current Temperatures Tt is less than target temperature Ta by the second judge module, if, call described defrost mode control module, the decrease speed of condenser coil temperature can intelligence, reflect the thickness of frost layer accurately, avoid frequently entering defrost, affect the heating effect of air-conditioning, cause the fluctuation of indoor temperature, the comfortableness that impact uses.
Further, described defrost mode control module comprises the second acquisition module and the 3rd judge module,
Described second acquisition module, for gathering set time T2 inner condenser coil pipe initial temperature Tt1 and condenser coil final temperature Tt2;
Described 3rd judge module, for judging, in described set time T2, whether the decrease speed S of described condenser coil temperature is greater than pre-set velocity value S1, if so, runs defrost pattern; Call described second acquisition module.
The beneficial effect of above-mentioned further scheme is adopted to be: to judge mould by the 3rd, judge whether the decrease speed S of condenser coil temperature reaches the pre-set velocity value S1 of defrosting, improves the accuracy and efficiency of defrosting.
Accompanying drawing explanation
Fig. 1 is the process control chart of the embodiment one of the control method that air-conditioner defrosting of the present invention judges;
Fig. 2 is the process control chart of the embodiment two of the control method that air-conditioner defrosting of the present invention judges;
Fig. 3 is the structured flowchart that air-conditioner defrosting of the present invention judges control system.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated.
The process control chart of the embodiment one of the control method that air-conditioner defrosting of the present invention judges, see Fig. 1, comprises the following steps.
Step S1, gathers the continuous operating time T under heating mode state.
Step S2, judges whether continuous operating time T is more than or equal to object time T1, if so, performs step S3; Otherwise return step S1.
Step S3, judges whether condenser coil Current Temperatures Tt is less than target temperature Ta, if so, performs step S4; Otherwise return step S2.
Step S4, controls the operation of defrost pattern according to the decrease speed of condenser coil temperature.
Judge that condenser is the need of defrosting by the dynamic collecting method of the decrease speed according to condenser coil temperature, the decrease speed of condenser coil temperature can intelligence, reflect the thickness of frost layer accurately, avoid frequently entering defrost, affect the heating effect of air-conditioning, cause the fluctuation of indoor temperature, the comfortableness that impact uses; First judge whether continuous operating time T is more than or equal to object time T1 simultaneously, avoid air-conditioning in starting up's stage, condenser coil temperature change affects greatly the erroneous judgement of the decrease speed of condenser coil temperature.
The process control chart of the embodiment two of the control method that air-conditioner defrosting of the present invention judges is see Fig. 2, and compared with embodiment one, its difference is, step S4 specifically comprises.
Step S41, gathers set time T2 inner condenser coil pipe initial temperature Tt1 and condenser coil final temperature Tt2.
Step S42, judges in set time T2, and whether the decrease speed S of condenser coil temperature is greater than pre-set velocity value S1, if so, runs defrost pattern; Otherwise return step S41, wherein, the computing formula of the decrease speed S of condenser coil temperature is: S=(Tt1-Tt2)/T2.
By arranging in rational time T2, detect condenser coil initial temperature Tt1 and condenser coil final temperature Tt2, whether the decrease speed S calculating condenser coil temperature by condenser coil initial temperature Tt1 and condenser coil final temperature Tt2 reaches the pre-set velocity value S1 of defrosting, improves the accuracy and efficiency of defrosting.
Air-conditioner defrosting of the present invention judges that the structured flowchart of control system is see Fig. 3, comprises the first acquisition module, the first judge module, the second judge module and defrost mode control module.
First acquisition module, for gathering the continuous operating time T under heating mode state.
First judge module, for judging whether continuous operating time T is more than or equal to object time T1, if so, calls the second judge module; Otherwise call the first acquisition module.
Second judge module, for judging whether condenser coil Current Temperatures Tt is less than target temperature Ta, if so, calls defrost mode control module; Otherwise call the first judge module.
Defrost mode control module, for controlling the operation of defrost pattern according to the decrease speed of condenser coil temperature.
Defrost mode control module comprises the second acquisition module and the 3rd judge module.
Second acquisition module, for gathering set time T2 inner condenser coil pipe initial temperature Tt1 and condenser coil final temperature Tt2.
3rd judge module, for judging in set time T2, whether the decrease speed S of condenser coil temperature is greater than pre-set velocity value S1, if so, runs defrost pattern; Call the second acquisition module.
Judge whether condenser coil Current Temperatures Tt is less than target temperature Ta by the second judge module, if, call defrost mode control module, the decrease speed of condenser coil temperature can intelligence, reflect the thickness of frost layer accurately, avoid frequently entering defrost, affect the heating effect of air-conditioning, cause the fluctuation of indoor temperature, the comfortableness that impact uses.
First embodiment of the control method that air-conditioner defrosting of the present invention judges, object time T1 is 40min, and target temperature Ta is 0 DEG C, and set time T2 is 10min, and pre-set velocity value S1 is 0.1 DEG C/min, after starting of air conditioner heating mode, under collection heating mode, continuous operating time T is after 30min, T<T1, return previous step, continuous operating time T under continuation collection heating mode, as T>T1, relatively whether condenser coil Current Temperatures Tt is less than target temperature Ta, as Tt<Ta, namely as Tt<0 DEG C, gather set time T2 inner condenser coil pipe initial temperature Tt1 and condenser coil final temperature Tt2, Tt1 is-0.5 DEG C, Tt2 is-1.8 DEG C, by formula S=(Tt1-Tt2)/T2=((-0.5 DEG C)-(-1.8 DEG C))/10=0.13 DEG C/min, i.e. S>S1, system cloud gray model defrost pattern.
Second embodiment of the control method that air-conditioner defrosting of the present invention judges, object time T1 is 32min, and target temperature Ta is 0 DEG C, and set time T2 is 3min, and pre-set velocity value S1 is 0.1 DEG C/min, after starting of air conditioner heating mode, under collection heating mode, continuous operating time T is after 35min, i.e. T>T1, Current Temperatures Tt is-0.5 DEG C, i.e. Tt<Ta, gather set time T2 inner condenser coil pipe initial temperature Tt1 and condenser coil final temperature Tt2, Tt1 is-0.8 DEG C, Tt2 is-1.0 DEG C, by formula S=(Tt1-Tt2)/T2=((-0.8 DEG C)-(-1.0 DEG C))/3=0.067 DEG C/min, i.e. S<S1, system returns and gathers set time T2 inner condenser coil pipe initial temperature Tt1 and condenser coil final temperature Tt2, Tt1 is-1.2 DEG C, Tt2 is-1.6 DEG C, by formula S=(Tt1-Tt2)/T2=((-1.2 DEG C)-(-1.6 DEG C))/3=0.133 DEG C/min, i.e. S>S1, system cloud gray model defrost pattern.
The control method judged air-conditioner defrosting of the present invention above and system are described in detail, and apply specific case herein and set forth principle of the present invention and embodiment.The explanation of above embodiment just understands core concept of the present invention for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a control method for air-conditioner defrosting judgement, is characterized in that, comprise the following steps:
Step S1, gathers the continuous operating time T under heating mode state;
Step S2, judges whether described continuous operating time T is more than or equal to object time T1, if so, performs step S3; Otherwise return step S1;
Step S3, judges whether condenser coil Current Temperatures Tt is less than target temperature Ta, if so, performs step S4; Otherwise return step S2;
Step S4, controls the operation of defrost pattern according to the decrease speed of condenser coil temperature.
2. the control method of air-conditioner defrosting judgement according to claim 1, it is characterized in that, described step S4 specifically comprises,
Step S41, gathers set time T2 inner condenser coil pipe initial temperature Tt1 and condenser coil final temperature Tt2;
Step S42, judges, in described set time T2, whether the decrease speed S of described condenser coil temperature is greater than pre-set velocity value S1, if so, runs defrost pattern; Otherwise return step S41.
3. the control method of air-conditioner defrosting judgement according to claim 3, it is characterized in that, in described step S42, the computing formula of the decrease speed S of condenser coil temperature is: S=(Tt1-Tt2)/T2.
4. the control method that the air-conditioner defrosting according to claim arbitrary in claims 1 to 3 judges, it is characterized in that, described object time T1 is 30min to 40min.
5. the control method that the air-conditioner defrosting according to claim arbitrary in claims 1 to 3 judges, it is characterized in that, described target temperature Ta is 0 DEG C.
6. the control method that judges of air-conditioner defrosting according to claim 4, is characterized in that, described pre-set velocity value S1 is 0.1 DEG C/and min to 0.2 DEG C/min.
7. the control method of air-conditioner defrosting judgement according to claim 6, it is characterized in that, described set time T2 is 50s to 15min.
8. the control method of air-conditioner defrosting judgement according to claim 7, it is characterized in that, described set time T2 is 10min.
9. judge a control system according to the air-conditioner defrosting of the arbitrary control method of claim 1-8, it is characterized in that, comprise the first acquisition module, the first judge module, the second judge module and defrost mode control module,
Described first acquisition module, for gathering the continuous operating time T under heating mode state;
Described first judge module, for judging whether described continuous operating time T is more than or equal to object time T1, if so, calls described second judge module; Otherwise call described first acquisition module;
Described second judge module, for judging whether condenser coil Current Temperatures Tt is less than target temperature Ta, if so, calls described defrost mode control module; Otherwise call described first judge module;
Described defrost mode control module, for controlling the operation of defrost pattern according to the decrease speed of condenser coil temperature.
10. want the air-conditioner defrosting described in 9 to judge control system according to right, it is characterized in that, described defrost mode control module comprises the second acquisition module and the 3rd judge module,
Described second acquisition module, for gathering set time T2 inner condenser coil pipe initial temperature Tt1 and condenser coil final temperature Tt2;
Described 3rd judge module, for judging, in described set time T2, whether the decrease speed S of described condenser coil temperature is greater than pre-set velocity value S1, if so, runs defrost pattern; Call described second acquisition module.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135629A (en) * | 2015-09-30 | 2015-12-09 | 海信（山东）空调有限公司 | Air conditioner defrosting control method and air conditioner |
| CN106679097A (en) * | 2016-12-30 | 2017-05-17 | Tcl空调器(中山)有限公司 | Defrosting control method and defrosting control device for air conditioner, and air conditioner |
| CN107120796A (en) * | 2017-05-17 | 2017-09-01 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107131611A (en) * | 2017-05-17 | 2017-09-05 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107228451A (en) * | 2017-05-17 | 2017-10-03 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107300240A (en) * | 2017-05-17 | 2017-10-27 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN108488994A (en) * | 2018-02-14 | 2018-09-04 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN109140693A (en) * | 2017-06-15 | 2019-01-04 | 奥克斯空调股份有限公司 | A kind of intelligent defrosting method of convertible frequency air-conditioner |
| WO2019007376A1 (en) * | 2017-07-05 | 2019-01-10 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN109323369A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | Air-conditioning and its defrosting method and device |
| CN109458708A (en) * | 2018-10-31 | 2019-03-12 | 珠海格力电器股份有限公司 | Non-communication air conditioner, and operation mode judgment method and control method thereof |
| CN110469958A (en) * | 2019-07-16 | 2019-11-19 | 青岛海尔空调器有限总公司 | Air-conditioner control method, device, computer equipment and storage medium |
| CN110779164A (en) * | 2019-11-13 | 2020-02-11 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and device, air conditioner and computer readable storage medium |
| CN110836472A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for fixed-frequency air conditioner |
| CN111486610A (en) * | 2020-04-22 | 2020-08-04 | 青岛海信日立空调系统有限公司 | Air source heat pump |
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| CN113483510A (en) * | 2021-07-20 | 2021-10-08 | 贵州省建筑设计研究院有限责任公司 | Defrosting start-stop control method for air source heat pump |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135629B (en) * | 2015-09-30 | 2018-01-09 | 海信（山东）空调有限公司 | Air conditioner defrosting control method and air conditioner |
| CN105135629A (en) * | 2015-09-30 | 2015-12-09 | 海信（山东）空调有限公司 | Air conditioner defrosting control method and air conditioner |
| CN106679097A (en) * | 2016-12-30 | 2017-05-17 | Tcl空调器(中山)有限公司 | Defrosting control method and defrosting control device for air conditioner, and air conditioner |
| CN107131611A (en) * | 2017-05-17 | 2017-09-05 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107228451A (en) * | 2017-05-17 | 2017-10-03 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107300240A (en) * | 2017-05-17 | 2017-10-27 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107120796A (en) * | 2017-05-17 | 2017-09-01 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN107120796B (en) * | 2017-05-17 | 2020-09-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN107131611B (en) * | 2017-05-17 | 2020-05-29 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN109140693A (en) * | 2017-06-15 | 2019-01-04 | 奥克斯空调股份有限公司 | A kind of intelligent defrosting method of convertible frequency air-conditioner |
| WO2019007376A1 (en) * | 2017-07-05 | 2019-01-10 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN108488994A (en) * | 2018-02-14 | 2018-09-04 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN110836472A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for fixed-frequency air conditioner |
| CN109323369A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | Air-conditioning and its defrosting method and device |
| CN109458708B (en) * | 2018-10-31 | 2020-03-13 | 珠海格力电器股份有限公司 | Non-communication air conditioner, and operation mode judgment method and control method thereof |
| CN109458708A (en) * | 2018-10-31 | 2019-03-12 | 珠海格力电器股份有限公司 | Non-communication air conditioner, and operation mode judgment method and control method thereof |
| CN110469958A (en) * | 2019-07-16 | 2019-11-19 | 青岛海尔空调器有限总公司 | Air-conditioner control method, device, computer equipment and storage medium |
| CN110779164A (en) * | 2019-11-13 | 2020-02-11 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and device, air conditioner and computer readable storage medium |
| CN111486610A (en) * | 2020-04-22 | 2020-08-04 | 青岛海信日立空调系统有限公司 | Air source heat pump |
| CN111486610B (en) * | 2020-04-22 | 2021-10-08 | 青岛海信日立空调系统有限公司 | Air source heat pump |
| CN113465147A (en) * | 2021-04-25 | 2021-10-01 | 青岛海尔空调器有限总公司 | Control method and system for heating of air conditioner and air conditioner |
| CN113483510A (en) * | 2021-07-20 | 2021-10-08 | 贵州省建筑设计研究院有限责任公司 | Defrosting start-stop control method for air source heat pump |
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