CN113513824B - Air conditioner defrosting control method and device and air conditioner - Google Patents
Air conditioner defrosting control method and device and air conditioner Download PDFInfo
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- CN113513824B CN113513824B CN202110508403.7A CN202110508403A CN113513824B CN 113513824 B CN113513824 B CN 113513824B CN 202110508403 A CN202110508403 A CN 202110508403A CN 113513824 B CN113513824 B CN 113513824B
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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
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F11/88—Electrical aspects, e.g. circuits
-
- 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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
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- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner defrosting control method and device and an air conditioner. The defrosting control method of the air conditioner comprises the following steps: controlling the air conditioner to be in a heating mode; obtaining outdoor environment temperature value T ao And a continuous heating time period t; t is not more than-5 DEG C ao And controlling the air conditioner to perform forced defrosting according to the t when the temperature is less than or equal to 7 ℃ and the air conditioner keeps a heating mode. The problem of when the air conditioner carries out the defrosting, can consume the heat of indoor environment to reduce indoor travelling comfort is solved.
Description
Technical Field
The invention relates to the technical field of air conditioner defrosting, in particular to an air conditioner defrosting control method, an air conditioner defrosting control device and an air conditioner.
Background
When the air conditioner operates in winter for heating, when the evaporation temperature is lower than the dew point temperature and lower than 0 ℃; if the air conditioner is operated for a long time to heat, the outdoor heat exchanger will be frosted, thereby affecting the efficiency of the heat exchanger. Therefore, when frost formation is detected to a certain degree, defrosting needs to be performed in time.
At present, the existing air conditioner judges whether the air conditioner needs defrosting or not by acquiring the running heating time of the air conditioner, the time from last defrosting, the external environment temperature and the temperature monitored by a defrosting temperature sensor.
The defrosting process is judged to be needed and operated as follows: and controlling the reversing of the four-way valve, conveying the high-temperature and high-pressure refrigerant to the outdoor unit for heat release and defrosting, and then conveying the refrigerant subjected to heat release and defrosting to the indoor unit for evaporation and heat absorption through throttling. Therefore, the minimum indoor unit pipe temperature can reach-30 ℃ during defrosting; in order to avoid blowing cold air indoors and ensure the comfort of the indoor environment, the indoor fan is in a closed state during defrosting.
Therefore, when the conventional air conditioner performs defrosting, heat of an indoor environment is consumed, and indoor comfort is reduced.
Disclosure of Invention
The invention solves the problem that the indoor comfort is reduced because the heat of the indoor environment is consumed when the air conditioner defrosts.
In order to solve the above problem, an embodiment of the present invention provides a defrosting control method for an air conditioner, including: controlling the air conditioner to be in a heating mode; obtaining outdoor environment temperature value T ao And a continuous heating time period t; t is not more than-5 DEG C ao And controlling the air conditioner to perform forced defrosting according to the t when the temperature is less than or equal to 7 ℃ and the air conditioner keeps a heating mode.
The existing air conditioner can defrost only when the frosting thickness is judged to a certain degree through the operation heating time, the time away from the last defrosting, the external environment temperature and the temperature monitored by the defrosting temperature sensor. When the external environment temperature is about 0 ℃, the outdoor heat exchanger is easy to frost due to low external environment temperature and high humidity, and the frosting condition is serious.
Through relevant experiments, the frosting degree of the outdoor heat exchanger has an obvious turning point on the influence of the heating capacity of the air conditioner, and when the frosting degree reaches or exceeds the turning point, the heating capacity of the air conditioner is sharply reduced, so that the heating output is insufficient. The user can obviously feel that the heating capacity of the air conditioner is reduced, and even the phenomenon that the indoor temperature is reduced due to the attenuation of the heating capacity can be caused, so that the indoor comfort is seriously influenced.
Compared with the prior art, the technical scheme has the following technical effects: according to related experiments, when the outdoor environment temperature is higher than 7 ℃, the surface of the outdoor heat exchanger is not easy to frost due to the higher temperature; when the outdoor environment temperature is lower than-5 ℃, the surface of the outdoor heat exchanger is not easy to frost due to low temperature and low air humidity. Therefore, when the outdoor environment temperature is-5 ℃ to 7 ℃, the surface of the outdoor heat exchanger is easy to frost, and at the moment, even if the air conditioner does not reach the defrosting condition, namely when the air conditioner continues to keep the heating mode, the air conditioner can be controlled in advance to carry out forced defrosting before the frosting degree reaches the turning point, so that the reduction of the heating capacity of the air conditioner is avoided, and the indoor comfort is improved.
In one embodiment of the invention, the air conditioner is controlled to perform forced defrosting according to the t; the method comprises the following steps: at t 1 T is less than or equal to t, and when a shutdown instruction or a warm shutdown instruction is received; wherein, t is 1 Is a first preset time length; and controlling the air conditioner to perform forced defrosting and then shutdown or shutdown to a temperature.
The technical effect achieved by adopting the technical scheme is as follows: at this time, the indoor unit is shut down or meets the temperature-reaching shutdown condition, and in order to improve the heating operation effect of the next startup, the forced defrosting is firstly carried out, and then the shutdown or the temperature-reaching shutdown is carried out.
In one embodiment of the present invention, the t 1 Between 30 and 60min.
The technical effect achieved by adopting the technical scheme is as follows: according to related experiments, the heating capacity is relatively stable in the first 30min of the heating operation of the air conditioner, and the air conditioner is just in a stable heating state at the moment, so that the next defrosting is not suitable to be rapidly started; and if the heating operation of the air conditioner exceeds 60min, the surface of the outdoor heat exchanger is usually frosted seriously.
In one embodiment of the invention, the air conditioner is controlled to perform forced defrosting according to the t; further comprising: at t 2 When T is less than or equal to T, acquiring indoor environment temperature value T n And indoor environment target temperature value T n '; wherein, t is 2 Is greater than t 1 The second preset time duration; at the T n ' with said T n Difference value Δ T of n ≤T 1 When the defrosting is needed, the air conditioner is controlled to perform forced defrosting; wherein, T is 1 Is a preset temperature difference.
In one embodiment of the present invention, said T 1 Between 1 and 3 ℃.
The technical effect achieved by adopting the technical scheme is as follows: at Δ T n ≤T 1 When the indoor temperature reaches a certain effect, the indoor temperature reaches a certain valueThe forced defrosting does not reduce the indoor temperature too much, and does not greatly influence the indoor comfort.
In one embodiment of the invention, the air conditioner is controlled to perform forced defrosting according to the t; further comprising: at t 3 T and T are less than or equal to 1 ＜ΔT n When the defrosting is needed, the air conditioner is controlled to perform forced defrosting; wherein, t is 3 Is greater than t 2 For a third predetermined time period.
In one embodiment of the present invention, the t 2 At least 60min, and/or, the t 3 At least 90min.
The technical effect achieved by adopting the technical scheme is as follows: the air conditioner has long continuous heating time, and the indoor temperature does not reach or approach the indoor environment target temperature value set by a user, which indicates that the frosting of the outdoor heat exchanger reaches a certain degree at the moment, and the heat exchange capacity of the outdoor heat exchanger cannot meet the indoor heating output requirement; in order to improve the heating output capacity, even if the defrosting condition is not achieved, forced defrosting is required.
In one embodiment of the invention, the temperature is-5 ℃ T ≦ T ao Controlling the air conditioner to perform forced defrosting according to the t when the temperature is less than or equal to 7 ℃ and the air conditioner keeps a heating mode; the method comprises the following steps: t is not more than-2 DEG C ao And controlling the air conditioner to perform forced defrosting according to the t when the temperature is less than or equal to 5 ℃ and the air conditioner keeps a heating mode.
The technical effect achieved by adopting the technical scheme is as follows: according to the relevant experiments, when the outdoor environment temperature is between-2 ℃ and 5 ℃, the outdoor heat exchanger is most prone to frost formation, so that forced defrosting is required to be carried out even if defrosting conditions are not met, and the heating comfort is ensured.
On the other hand, the embodiment of the invention also provides a defrosting control device of an air conditioner, which comprises the following components: the heating module is used for controlling the air conditioner to be in a heating mode; an acquisition module for acquiring outdoor environment temperature value T ao And a continuous heating time period t; a forced defrosting module for T being less than or equal to-5 DEG C ao The temperature is less than or equal to 7 ℃, and the air conditioner keeps heatingAnd in the mode, controlling the air conditioner to perform forced defrosting according to the t.
In another aspect, an embodiment of the present invention further provides an air conditioner, including a memory storing a computer program and a package IC, where the computer program is read by the package IC and executed by the package IC, and the air conditioner implements the air conditioner defrosting control method according to any one of the above embodiments.
In summary, the above embodiments of the present application may have the following advantages or beneficial effects: before the frosting condition of the outdoor heat exchanger reaches the turning point, forced defrosting can be carried out in advance, indoor comfort is guaranteed, and reduction of indoor temperature due to defrosting is avoided.
Drawings
Fig. 1 is a flowchart illustrating a defrosting control method for an air conditioner according to a first embodiment of the present invention.
Fig. 2 is a block diagram illustrating a defrosting control device 100 for an air conditioner according to a second embodiment of the present invention.
Fig. 3 is a block diagram of an air conditioner 200 according to a third embodiment of the present invention.
Fig. 4 is a block diagram of a readable storage medium 300 according to a fourth embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
[ first embodiment ] A
Referring to fig. 1, a flowchart of a defrosting control method for an air conditioner according to a first embodiment of the present invention is shown. The defrosting control method of the air conditioner comprises the following steps:
and S10, controlling the air conditioner to be in a heating mode.
S20, acquiring outdoor environment temperature value T ao And a continuous heating time period t.
The outdoor environment temperature value T can be obtained through a temperature sensor arranged on an air conditioner outdoor unit ao (ii) a The continuous heating time period t may be acquired according to a timer.
S30, T is more than or equal to minus 5 DEG C ao And controlling the air conditioner to perform forced defrosting according to the t when the temperature is less than or equal to 7 ℃ and the air conditioner keeps a heating mode.
Wherein, the air conditioner keeps the heating mode as follows: at the moment, the air conditioner does not reach the defrosting condition, and the normal defrosting process is not started; or the air conditioner does not perform a defrosting process according to the existing defrosting manner. The T is ao At the temperature of-5 ℃ to 7 ℃, the outdoor heat exchanger is easy to frost, and forced defrosting needs to be carried out according to the continuous heating time t when the defrosting condition is not achieved, so that forced defrosting is carried out in advance, and the indoor comfort is improved.
Determined according to the relevant experiment, said T ao The outdoor heat exchanger is most susceptible to frost formation at-2 c to-5 c, and it is preferable to perform the step S30 in this case.
The air conditioner defrosting control method is clearly and specifically exemplified by combining the use scenes provided below.
Starting a heating mode for heating a certain type of air conditioner; the air conditioner obtains an external environment temperature value T ao ＝0℃。
A first preset time t preset by the air conditioner 1 Between 30 and 60min, for example, the t is set 1 =40min. And starting timing from the starting of the heating mode of the air conditioner to obtain the continuous heating time t of the air conditioner.
For example, when t =40min, a shutdown instruction is received, or a warm shutdown condition is met; at the moment, the air conditioner performs forced defrosting, and after the forced defrosting is completed, the air conditioner is shut down according to the shutdown instruction, or is shut down at the temperature according to the temperature-reaching shutdown instruction. Of course, t may also be other time duration greater than 40min, which is not described herein again.
In another case, the air conditioner is preset for a second preset time period t 2 At least 60min, e.g. setting said t 2 And =60min. Can also be at t 1 ≤t＜t 2 When the system is in use, a shutdown instruction is received, or a warm shutdown condition is met; at this time, the air conditioner also startsAnd performing forced defrosting, and after the forced defrosting is finished, performing shutdown according to the shutdown instruction, or performing warm shutdown according to the warm shutdown instruction.
And for example at t 2 When T is less than or equal to T, the air conditioner acquires a target temperature value T of the indoor environment n ' and periodically acquiring indoor environment temperature value T n (ii) a Wherein, T is n ' setting a desired value for a user, i.e., the user desires the indoor ambient temperature to reach said T n '. For example, the current indoor environment temperature value T may be acquired every 1s n 。
For example, when T =60min, the T is acquired n ' =28 ℃, and the T is obtained n =27 ℃; at this time, the difference Δ T between the two n =1 ℃. And the preset temperature difference T set by the air conditioner 1 Between 1 and 3 ℃, e.g. setting said T 1 =2 ℃. And said Δ T n ≤T 1 ，
At this time, the air conditioner is controlled to perform forced defrosting. Since the indoor ambient temperature is already very close to the T set by the user n Therefore, when forced defrosting is performed, the indoor temperature is not lowered so much, and the comfort in the room is not greatly affected. Of course, t may also be other time duration greater than 60min, which is not described herein again.
In yet another case, the air conditioner is preset for a third preset time period t 3 At least 90min, e.g. setting said t 3 And =90min. T may also be satisfied at said t 2 ≤t＜t 3 The air conditioner obtains a target temperature value T of the indoor environment n ' and periodically acquiring indoor environment temperature value T n And satisfy Δ T n ≤T 1 And controlling the air conditioner to perform forced defrosting.
E.g. at t 3 When T is less than or equal to T, the air conditioner also obtains the target temperature value T of the indoor environment n ' and periodically acquiring indoor environment temperature value T n . For example, when T =90min, the T is obtained n ' =28 ℃ and the T is obtained n =24 ℃; at this time, the difference Δ T between the two n =4 ℃. And the T set by the air conditioner 1 =2 ℃. And said Δ T n ＞T 1 And at this time, controlling the air conditioner to perform forced defrosting. At this time, the air conditioner is continuously heated for 90min, and the indoor environment temperature does not reach the target indoor environment temperature set by the user, which indicates that the outdoor heat exchanger is frosted to a certain extent, the heat exchange capacity of the outdoor heat exchanger cannot meet the heating output requirement of the indoor unit, and in order to improve the heating output, the defrosting operation is required. Of course, t may also be other time duration greater than 90min, which is not described herein again.
[ second embodiment ]
Referring to fig. 2, it is a schematic block diagram of a defrosting control device for an air conditioner according to a second embodiment of the present invention. The air conditioner defrosting control device 100 includes, for example: a heating module 110 for controlling the air conditioner to be in a heating mode; an obtaining module 120 for obtaining the outdoor ambient temperature value T ao And a continuous heating time period t; a forced defrosting module 130 for T being less than or equal to minus 5 DEG C ao And controlling the air conditioner to perform forced defrosting according to the t when the temperature is less than or equal to 7 ℃ and the air conditioner keeps a heating mode.
In a specific embodiment, the heating module 110, the obtaining module 120, and the forced defrosting module 130 of the air conditioner defrosting control apparatus 100 cooperate to implement the air conditioner defrosting control method described in the first embodiment, which is not described herein again.
[ third embodiment ]
Referring to fig. 3, which is a block diagram of an air conditioner according to a third embodiment of the present invention, the air conditioner 200 includes, for example, a package IC220 and a memory 210 electrically connected to the package IC220, the memory 210 stores a computer program 211, and when the computer program 211 is read by the package IC220 and is run, the air conditioner 200 implements the air conditioner defrosting control method according to the first embodiment.
In one embodiment, the packaged IC220 is, for example, a processor chip electrically connected to the memory 210 for reading and executing the computer program. The packaged IC220 may also be a packaged circuit board that encloses a processor chip that can read and execute the computer program 211; of course, the circuit board may also encapsulate the memory 210.
On the other hand, the processor chip may further be provided with the air conditioner defrosting control device 100 according to the second embodiment, and the processor chip may implement the air conditioner defrosting control method according to the first embodiment through the air conditioner defrosting control device 100, which is not described herein again.
[ fourth embodiment ]
Referring to fig. 4, which is a schematic structural diagram of a readable storage medium according to a fourth embodiment of the present invention, the readable storage medium 300 is, for example, a non-volatile memory, and is, for example: magnetic media (e.g., hard disks, floppy disks, and magnetic tape), optical media (e.g., cd ROM disks and DVDs), magneto-optical media (e.g., optical disks), and hardware devices specially constructed for storing and executing computer-executable instructions (e.g., read Only Memories (ROMs), random Access Memories (RAMs), flash memories, etc.). The readable storage medium 300 has stored thereon computer-executable instructions 310. The readable storage medium 300 may be executable by one or more processors or processing devices to execute the computer-executable instructions 310 to cause an air conditioner in which it is located to implement the air conditioner defrost control method as described in the first embodiment.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A defrosting control method of an air conditioner is characterized by comprising the following steps:
controlling the air conditioner to be in a heating mode;
obtaining outdoor environment temperature value T ao And a continuous heating time period t;
t is more than or equal to minus 5 DEG C ao Controlling the air conditioner to perform forced defrosting according to the t when the temperature is less than or equal to 7 ℃ and the air conditioner keeps a heating mode;
controlling the air conditioner to perform forced defrosting according to the t; the method comprises the following steps:
at t 1 T is less than or equal to t, and when a shutdown instruction or a warm shutdown instruction is received; wherein, t is 1 Is a first preset time length;
controlling the air conditioner to perform forced defrosting and then shutdown or shutdown to a temperature;
at t 2 When T is less than or equal to T, acquiring indoor environment temperature value T n And indoor environment target temperature value T n '; wherein, t is 2 Is greater than t 1 The second preset time duration of (1);
at the T n ' with said T n Δ T n ≤T 1 When the air conditioner is started, the air conditioner is controlled to perform forced defrosting; wherein, T is 1 Is a preset temperature difference value;
at t 3 T and T are less than or equal to 1 ＜∆T n When the defrosting is needed, the air conditioner is controlled to perform forced defrosting; wherein, t is 3 Is greater than t 2 For a third predetermined time period.
2. The air conditioner defrosting control method of claim 1, wherein the t is t 1 Between 30 and 60min.
3. The air conditioner defrost control method of claim 1, wherein the T is 1 Between 1 and 3 ℃.
4. The air conditioner defrost control method of claim 1, wherein the t 2 At least 60min, and/or, the t is 3 At least 90min.
5. The air conditioner defrost control method of claim 1 wherein said T is ≦ 5 ≦ T ao Controlling the air conditioner to perform forced defrosting according to the t when the temperature is less than or equal to 7 ℃ and the air conditioner keeps a heating mode; the method comprises the following steps:
t is not more than-2 DEG C ao At the temperature of less than or equal to 5 ℃, and when the air conditioner keeps the heating mode, according to the placeAnd controlling the air conditioner to perform forced defrosting by the t.
6. An air conditioner defrosting control apparatus for performing a control method according to any one of claims 1 to 5, comprising:
the heating module is used for controlling the air conditioner to be in a heating mode;
an acquisition module for acquiring outdoor environment temperature value T ao And a continuous heating time period t;
a forced defrosting module for controlling the temperature T to be less than or equal to minus 5 DEG C ao And the temperature is less than or equal to 7 ℃, and when the air conditioner keeps a heating mode, the air conditioner is controlled to perform forced defrosting.
7. An air conditioner comprising a memory storing a computer program and a packaged IC, wherein the computer program is read by the packaged IC and executed, and the air conditioner implements the air conditioner defrosting control method according to any one of claims 1 to 5.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05322264A (en) * | 1992-05-21 | 1993-12-07 | Fujitsu General Ltd | Controlling method for defrosting in air conditioner |
| CN1955592A (en) * | 2005-10-28 | 2007-05-02 | 乐金电子(天津)电器有限公司 | Defrost control method of air conditioner |
| CN102901182B (en) * | 2012-10-16 | 2015-06-03 | 青岛海尔空调电子有限公司 | Defrosting method for air conditioner |
| CN104110766B (en) * | 2013-05-29 | 2016-12-28 | 广东美的制冷设备有限公司 | A kind of control method of air-conditioner intelligent defrosting |
| CN105910237A (en) * | 2016-05-11 | 2016-08-31 | 广东美的制冷设备有限公司 | Defrosting control method and device for air conditioner |
| JP2018035981A (en) * | 2016-08-30 | 2018-03-08 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN106765868B (en) * | 2016-11-17 | 2019-04-09 | 珠海格力电器股份有限公司 | The defrosting control method and device of air-conditioning system |
| CN110631196B (en) * | 2018-06-25 | 2022-04-15 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN109654664B (en) * | 2018-11-14 | 2020-04-28 | 珠海格力电器股份有限公司 | Intelligent defrosting method and system based on room heat load and air conditioner |
| CN109780684B (en) * | 2019-01-24 | 2022-06-24 | 青岛海尔空调电子有限公司 | Air conditioner control method and device, air conditioner and storage medium |
| CN111425991B (en) * | 2020-04-03 | 2021-10-26 | 广东美的暖通设备有限公司 | Control method, air conditioning system, and computer-readable storage medium |
| CN111780348B (en) * | 2020-06-23 | 2022-02-01 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting method, defrosting control device and air conditioner |
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