CN110836466B - Defrosting control method for fixed-frequency air conditioner - Google Patents
Defrosting control method for fixed-frequency air conditioner Download PDFInfo
- Publication number
- CN110836466B CN110836466B CN201810940303.XA CN201810940303A CN110836466B CN 110836466 B CN110836466 B CN 110836466B CN 201810940303 A CN201810940303 A CN 201810940303A CN 110836466 B CN110836466 B CN 110836466B
- Authority
- CN
- China
- Prior art keywords
- air conditioner
- frequency air
- temperature
- control method
- fixed
- 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.)
- Active
Links
Images
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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/64—Electronic processing using pre-stored data
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for a fixed-frequency air conditioner. In order to improve the defrosting efficiency of the fixed-frequency air conditioner, the defrosting control method for the fixed-frequency air conditioner provided by the invention comprises the following steps: under the condition that the fixed-frequency air conditioner is in a heating working condition, the indoor temperature T is detected in real timeIndoor useDetecting the temperature of the inner coil pipe at preset time intervals; calculating the preset temperatures Tset and TIndoor useIs equal to Tset-TIndoor use(ii) a And judging whether the fixed-frequency air conditioner enters a defrosting mode or not according to the difference value delta T and the attenuation speed of the temperature of the inner coil. The application creatively utilizes the change trend of the temperature of the inner coil and combines the change of the indoor temperature to represent the frosting degree of the outer unit, thereby judging the opportunity when the air conditioner enters the defrosting mode, avoiding the fixed-frequency air conditioner from frequently entering the defrosting mode, ensuring the defrosting effect and improving the user experience.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method for a fixed-frequency air conditioner.
Background
The air conditioner as a device capable of adjusting the indoor environment temperature has the working principle that: the indoor environment temperature is lowered or raised by the refrigerant switching between the circulation lines through the high pressure/low pressure/gas/liquid state, namely, the air conditioner is in the cooling or heating working condition from the perspective of the indoor unit. When the air conditioner heats the operation, if outdoor coil pipe temperature under certain humidity condition crosses lowly can lead to the condition of frosting, and outdoor coil pipe frosting can lead to outdoor heat exchanger's heat exchange efficiency to reduce, influences the heating effect of air conditioner, reduces indoor environment's travelling comfort, influences user experience. Therefore, in the situation that the air conditioner is in the heating working condition, the outdoor coil of the air conditioner needs to be defrosted timely and effectively.
For a fixed-frequency air conditioner, the power supply frequency cannot be changed, and even if the indoor temperature reaches the set temperature, the air conditioner cannot automatically adjust the cooling or heating speed. Because the temperature of the external coil of the fixed-frequency air conditioner is not provided with a temperature sensor, the temperature of the external coil cannot be acquired, and therefore the defrosting time of the fixed-frequency air conditioner cannot be judged according to parameters such as the temperature of the external coil. In addition, the defrosting efficiency is accelerated due to the lack of auxiliary means in the conventional defrosting process, so that the conventional defrosting process is single and the efficiency is low.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
Based on the above problems in the background art, in order to improve the defrosting efficiency of the fixed-frequency air conditioner, the invention provides a defrosting control method for the fixed-frequency air conditioner, which comprises the following steps: under the condition that the fixed-frequency air conditioner is in a heating working condition, the indoor temperature T is detected in real timeIndoor useDetecting the temperature of the inner coil pipe at preset time intervals; calculating the preset temperatures Tset and TIndoor useIs equal to Tset-TIndoor use(ii) a Attenuation according to the difference Delta T and the temperature of the inner coilAnd judging whether the fixed-frequency air conditioner enters a defrosting mode or not by the speed.
In a preferred embodiment of the above defrosting control method for a fixed-frequency air conditioner, the step of "determining whether to make the fixed-frequency air conditioner enter a defrosting mode according to the difference Δ T and the attenuation speed of the temperature of the inner coil" specifically includes: calculating the attenuation value delta t of the temperature of the inner coil in a preset timen＝tm－tm-1(ii) a If Δ tn－Δtn-1The constant-frequency air conditioner enters a defrosting mode when the temperature is more than or equal to a set temperature and the continuous L times of delta T are more than or equal to a preset value, otherwise, the constant-frequency air conditioner maintains the current heating working condition; wherein, tmIs the temperature of the inner coil at the present moment, tm-1The temperature of the inner coil pipe at the previous moment is shown, m is an integer larger than 1, and m is an integer larger than 1; Δ tnIs the attenuation value of the temperature of the inner coil pipe within the current preset time, delta tn-1The attenuation value of the temperature of the inner coil in the last preset time is shown, and n is an integer larger than 1.
In a preferred embodiment of the above defrosting control method for a fixed-frequency air conditioner, the preset time is any time between 10 and 20 seconds, or the preset time is 15 seconds.
In a preferred embodiment of the above-described defrosting control method for a fixed-frequency air conditioner, the set temperature is any temperature between 0.9 and 1.1 ℃, or the set temperature is 1 ℃.
In a preferred embodiment of the above defrosting control method for a fixed-frequency air conditioner, the preset value is any temperature between 1.5 and 2.5 ℃, or the preset value is 2 ℃; and/or said L is equal to 3.
In a preferred embodiment of the above-described defrosting control method for a fixed-frequency air conditioner, the method further includes: and after the fixed-frequency air conditioner enters a defrosting mode, controlling an outdoor fan to rotate for a second set time at intervals of a first set time.
In a preferred embodiment of the above-described defrosting control method for a fixed-frequency air conditioner, the first set time is any time between 2 and 4 minutes, or the first set time is 3 minutes; and/or the second set time is any time between 15 and 25 seconds, or the second set time is 20 seconds.
In a preferred embodiment of the above defrosting control method for a fixed frequency air conditioner, the fixed frequency air conditioner includes a bypass defrosting circuit, which is provided between a compressor and an outdoor unit of the fixed frequency air conditioner, for introducing high pressure gas discharged from the compressor into the outdoor unit to melt frost on a coil of the outdoor unit, the method includes: and after the fixed-frequency air conditioner enters a defrosting mode, starting the bypass defrosting loop.
In a preferred embodiment of the above-described defrosting control method for a fixed-frequency air conditioner, the method further includes: in the process of reversing the outdoor fan, closing the bypass defrosting loop; after the fan rotates reversely for a second set time, the bypass defrosting circuit is opened for a third set time; wherein the third set time is less than the first set time.
In a preferred embodiment of the above defrosting control method for a fixed frequency air conditioner, the third set time is any time between 9 and 11 seconds, or the third set time is 10 seconds.
Because the outer unit coil of the fixed-frequency air conditioner is not provided with the temperature sensor, the time for entering the defrosting mode cannot be judged by acquiring the temperature of the outer coil, the inventor of the application discovers through years of intensive research and repeated tests that the frosting condition of the outer coil can also be indirectly indicated by the changes of the temperature of the inner coil and the indoor temperature in the heating process of the air conditioner, therefore, the application innovatively utilizes the change trend of the temperature of the inner coil and combines the change of the indoor temperature to represent the frosting degree of the outer unit, the time for the air conditioner to enter the defrosting mode is judged, the fixed-frequency air conditioner is prevented from entering the defrosting mode frequently, the defrosting effect is ensured, and the user experience is improved. As a preferred example, after the air conditioner enters the defrosting mode, the defrosting efficiency is improved by controlling the outdoor fan to reverse at intervals, that is, controlling the outdoor fan to reverse for a period of time every time the frost is defrosted, in other words, after the frost is melted for a part, the frost layer is blown off quickly by the back blowing action of the outdoor fan.
Drawings
FIG. 1 is a principal flow diagram of the defrost control method of the present invention;
fig. 2 is a flowchart of a defrost control method of an embodiment of the present invention.
Detailed Description
In order to make the embodiments, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the embodiments are some, but not all embodiments of the present invention. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
Referring first to fig. 1, fig. 1 is a main flowchart of a defrost control method of the present invention. As shown in fig. 1, the defrosting control method for a fixed frequency air conditioner of the present invention includes: s110, detecting the indoor temperature T in real time under the condition that the fixed-frequency air conditioner is in the heating working conditionIndoor useDetecting the temperature of the inner coil pipe at preset time intervals; s120, calculating the preset temperatures Tset and TIndoor useIs equal to Tset-TIndoor use(ii) a And S130, judging whether the fixed-frequency air conditioner enters a defrosting mode or not according to the difference value delta T and the attenuation speed of the temperature of the inner coil. Wherein, the preset temperature Tset can be set to a reasonable temperature by a person skilled in the art according to experiments. Because the outer unit coil of the fixed-frequency air conditioner is not provided with the temperature sensor, the time for entering the defrosting mode cannot be judged by acquiring the temperature of the outer coil, the inventor of the application finds that the frosting condition of the outer coil can also be indirectly indicated by the change of the temperature of the inner coil and the indoor temperature through years of intensive research and repeated tests, so that the change trend of the temperature of the inner coil is innovatively utilized and the indoor temperature is combined to represent the frosting degree of the outer unit, and the time for the air conditioner to enter the defrosting mode is judged.
Specifically, first, the attenuation value Δ t of the inner coil temperature in a preset time is calculatedn＝tm－tm-1(ii) a Wherein, tmIs the temperature of the inner coil at the present moment, tm-1M is greater than the temperature of the inner coil pipe at the previous moment1 is an integer. If Δ tn－Δtn-1The constant frequency air conditioner enters a defrosting mode when the temperature is more than or equal to the set temperature and delta T is more than or equal to the preset value for continuous L times, for example, L is 3, otherwise, the constant frequency air conditioner maintains the current heating working condition, wherein delta TnIs the attenuation value of the temperature of the inner coil pipe within the current preset time, delta tn-1The attenuation value of the temperature of the inner coil in the last preset time is shown, and n is an integer larger than 1. As an example, the preset value may be 2, or may be any value between 1.5 and 2.5; the preset time can be 15 seconds, or can be any time between 10 and 20 seconds; the set temperature may be 1 deg.c or any temperature between 0.9 and 1.1 deg.c. The skilled person can also set other preset time and set temperature reasonably according to the actual situation of the fixed-frequency air conditioner. The technical personnel in the field can understand that the temperature of the inner coil and the indoor temperature are attenuated along with the increase of the frosting degree of the outdoor unit, so that the frosting degree of the outdoor unit can be accurately judged by utilizing the attenuation degree of the temperature of the inner coil and the attenuation value of the indoor temperature (for example, the indoor temperature is continuously and repeatedly lower than the preset temperature by more than 2 ℃), the frequent defrosting of the fixed-frequency air conditioner is avoided, the defrosting effect is ensured, and the user experience is improved.
In a preferred implementation, referring to fig. 2, fig. 2 is a flow chart of a defrost control method according to an embodiment of the present invention. As shown in fig. 2, step S210 is first executed to detect the indoor temperature T in real timeIndoor useDetecting the temperature of the inner coil pipe at preset time intervals; then, the process proceeds to step S220 to determine Δ tn－Δtn-1Whether the Tset-T is greater than or equal to the set temperature and whether the Tset-T is continuously calculated for 3 timesIndoor useAnd if so, the step S230 is carried out, the outdoor fan is controlled to rotate for a second set time every a first set time, otherwise, the step S210 is carried out. Wherein, the first set time can be 3 minutes, or can be any time between 2 and 4 minutes; the second set time may be 20 seconds or any time between 15 and 25 seconds. In this way, after the air conditioner enters the defrosting mode, the outdoor fan is controlled to rotate reversely at intervals, namely, the outdoor fan is controlled to rotate reversely for a period of time every defrosting period, in other words, the frost is melted every timeAfter a part of the defrosting operation, the frost layer is quickly blown off by the back blowing action of the outdoor fan, so that the defrosting efficiency is improved. Compared with the traditional defrosting mode, namely the condition that the frost layer is required to be gradually separated from the outdoor unit or completely melted into water, the defrosting method can more quickly finish defrosting operation and effectively reduce the influence of the defrosting process on the indoor temperature.
Further, the fixed frequency air conditioner comprises a bypass defrosting circuit, wherein the bypass defrosting circuit is arranged between a compressor and an outdoor unit of the fixed frequency air conditioner and is used for introducing high-pressure gas discharged by the compressor into the outdoor unit so as to melt frost layers on a coil pipe of the outdoor unit. In this embodiment, after the fixed-frequency air conditioner enters the defrost mode, the bypass defrost loop is turned on. Preferably, during the reverse rotation of the outdoor fan, the bypass defrosting circuit is closed; after the outdoor fan rotates reversely for a second set time, starting a bypass defrosting loop for a third set time; wherein the third set time is less than the first set time. As an example, the third set time may be 10 seconds, or the third set time may be any value between 9-11 seconds. Therefore, when the outdoor fan is controlled to reversely rotate at intervals, the bypass defrosting circuit is correspondingly controlled to be closed, and the bypass defrosting circuit is opened after the reverse rotation is finished for the preset time, so that the reverse rotation of the outdoor fan is staggered with the opening state of the bypass circuit, the influence of the reverse rotation of the outdoor fan on the bypass defrosting is avoided, and the defrosting efficiency is greatly improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (17)
1. A defrost control method for a fixed frequency air conditioner, the method comprising the steps of:
under the condition that the fixed-frequency air conditioner is in the heating working conditionReal-time detection of indoor temperature TIndoor useDetecting the temperature of the inner coil pipe at preset time intervals;
calculating the preset temperatures Tset and TIndoor useDifference Δ T = Tset-TIndoor use；
Judging whether the fixed-frequency air conditioner enters a defrosting mode or not according to the difference value delta T and the attenuation speed of the temperature of the inner coil;
the step of judging whether to enable the fixed-frequency air conditioner to enter the defrosting mode according to the difference value delta T and the attenuation speed of the temperature of the inner coil specifically comprises the following steps:
calculating the attenuation value delta t of the temperature of the inner coil in a preset timen=tm－tm-1；
If Δ tn－Δtn-1The constant-frequency air conditioner enters a defrosting mode when the temperature is more than or equal to a set temperature and the continuous L times of delta T are more than or equal to a preset value, otherwise, the constant-frequency air conditioner maintains the current heating working condition;
wherein, tmIs the temperature of the inner coil at the present moment, tm-1The temperature of the inner coil pipe at the previous moment is shown, m is an integer larger than 1, and m is an integer larger than 1; Δ tnIs the attenuation value of the temperature of the inner coil pipe within the current preset time, delta tn-1The attenuation value of the temperature of the inner coil in the last preset time is shown, and n is an integer larger than 1.
2. A defrost control method for a fixed frequency air conditioner according to claim 1, characterized in that said preset time is any time between 10-20 seconds.
3. A defrost control method for a fixed frequency air conditioner according to claim 1, characterized in that said preset time is 15 seconds.
4. The defrosting control method for a fixed frequency air conditioner according to claim 2, wherein the set temperature is any temperature between 0.9-1.1 ℃.
5. The defrost control method for a fixed frequency air conditioner according to claim 2, wherein the set temperature is 1 ℃.
6. The defrost control method for a fixed frequency air conditioner according to claim 4, wherein said preset value is any temperature between 1.5-2.5 ℃.
7. The defrost control method for a fixed frequency air conditioner according to claim 4, wherein the preset value is 2 ℃.
8. A defrost control method for a fixed frequency air conditioner according to claim 4, characterized in that said L equals 3.
9. The defrost control method for a fixed frequency air conditioner of claim 1, further comprising: and after the fixed-frequency air conditioner enters a defrosting mode, controlling an outdoor fan to rotate for a second set time at intervals of a first set time.
10. A defrost control method for a fixed frequency air conditioner according to claim 9, characterized in that said first set time is any time between 2-4 minutes.
11. A defrosting control method for a fixed frequency air conditioner according to claim 9, wherein the first set time is 3 minutes.
12. A defrost control method for a fixed frequency air conditioner according to claim 9, characterized in that said second set time is any time between 15-25 seconds.
13. A defrost control method for a fixed frequency air conditioner according to claim 9, characterized in that said second set time is 20 seconds.
14. The defrosting control method for a fixed frequency air conditioner according to any one of claims 1 to 13, wherein the fixed frequency air conditioner includes a bypass defrosting circuit provided between a compressor and an outdoor unit of the fixed frequency air conditioner for introducing high pressure gas discharged from the compressor into the outdoor unit to melt frost on a coil of the outdoor unit,
the method comprises the following steps:
and after the fixed-frequency air conditioner enters a defrosting mode, starting the bypass defrosting loop.
15. A defrost control method for a fixed frequency air conditioner according to claim 14 when dependent on any one of claims 9 to 13, characterized in that said method further comprises:
in the process of reversing the outdoor fan, closing the bypass defrosting loop;
after the fan rotates reversely for a second set time, the bypass defrosting circuit is opened for a third set time;
wherein the third set time is less than the first set time.
16. A defrost control method for a fixed frequency air conditioner according to claim 15, characterized in that said third set time is any time between 9-11 seconds.
17. A defrost control method for a fixed frequency air conditioner according to claim 15, characterized in that said third set time is 10 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940303.XA CN110836466B (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for fixed-frequency air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940303.XA CN110836466B (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for fixed-frequency air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110836466A CN110836466A (en) | 2020-02-25 |
| CN110836466B true CN110836466B (en) | 2021-09-24 |
Family
ID=69573636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810940303.XA Active CN110836466B (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for fixed-frequency air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110836466B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266922B (en) * | 2021-05-28 | 2022-03-25 | 中山市爱美泰电器有限公司 | Defrosting control method of heat pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888669A (en) * | 2005-06-30 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Air conditioner outdoor machine defrosting operation controlling method |
| CN106369750A (en) * | 2016-09-08 | 2017-02-01 | 广东美的暖通设备有限公司 | Defrosting control method and defrosting control device of air conditioner and air conditioner |
| CN106885391A (en) * | 2017-02-28 | 2017-06-23 | 广东美的制冷设备有限公司 | A kind of air-conditioner and its 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 |
| CN107702293A (en) * | 2017-09-20 | 2018-02-16 | 青岛海尔空调电子有限公司 | Air conditioner defrosting control method |
| EP3473946A1 (en) * | 2016-12-28 | 2019-04-24 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Multi-split air conditioner control device, multi-split air conditioner, multi-split air conditioner control method, and multi-split air conditioner control program |
-
2018
- 2018-08-17 CN CN201810940303.XA patent/CN110836466B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888669A (en) * | 2005-06-30 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Air conditioner outdoor machine defrosting operation controlling method |
| CN106369750A (en) * | 2016-09-08 | 2017-02-01 | 广东美的暖通设备有限公司 | Defrosting control method and defrosting control device of air conditioner and air conditioner |
| EP3473946A1 (en) * | 2016-12-28 | 2019-04-24 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Multi-split air conditioner control device, multi-split air conditioner, multi-split air conditioner control method, and multi-split air conditioner control program |
| CN106885391A (en) * | 2017-02-28 | 2017-06-23 | 广东美的制冷设备有限公司 | A kind of air-conditioner and its 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 |
| CN107702293A (en) * | 2017-09-20 | 2018-02-16 | 青岛海尔空调电子有限公司 | Air conditioner defrosting control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110836466A (en) | 2020-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110836470B (en) | Defrosting control method for fixed-frequency air conditioner | |
| CN110836503B (en) | Defrosting control method for air conditioner | |
| CN110836466B (en) | Defrosting control method for fixed-frequency air conditioner | |
| CN110836444B (en) | Defrosting control method for fixed-frequency air conditioner | |
| CN110836472B (en) | Defrosting control method for fixed-frequency air conditioner | |
| CN110836479B (en) | Defrosting control method for air conditioner | |
| CN110836492B (en) | Defrosting control method for air conditioner | |
| CN110836467B (en) | Defrosting control method for fixed-frequency air conditioner | |
| CN110836502B (en) | Defrosting control method for air conditioner | |
| CN110836446B (en) | Defrosting control method for air conditioner | |
| CN110836473B (en) | Defrosting control method for air conditioner | |
| CN110836445B (en) | Defrosting control method for fixed-frequency air conditioner | |
| CN110836453A (en) | Defrosting control method for air conditioner | |
| CN110836500A (en) | Defrosting control method for air conditioner | |
| CN110836475B (en) | Defrosting control method for air conditioner | |
| CN110836481B (en) | Defrosting control method for air conditioner | |
| CN110836449B (en) | Defrosting control method for air conditioner | |
| CN110836478B (en) | Defrosting control method for air conditioner | |
| CN110836480B (en) | Defrosting control method for air conditioner | |
| CN110836474B (en) | Defrosting control method for air conditioner | |
| CN110836448B (en) | Defrosting control method for air conditioner | |
| CN110836447B (en) | Defrosting control method for air conditioner | |
| CN110836476A (en) | Defrosting control method for fixed-frequency air conditioner | |
| CN110836489B (en) | Defrosting control method for air conditioner | |
| CN110836465B (en) | Defrosting control method for 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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210913 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
|
| TA01 | Transfer of patent application right |