Control method for air conditioner, air conditioner, and storage medium

Abstract

The present application relates to the technical field of air conditioners, and discloses a control method for an air conditioner, an air conditioner, and a storage medium. The air conditioner comprises a compressor, and an indoor heat exchanger, a throttling device, and an outdoor heat exchanger which are sequentially connected, wherein the indoor heat exchanger is correspondingly provided with an indoor fan. The method comprises: controlling the air conditioner to operate in a heating mode; and when the air conditioner satisfies a defrosting starting condition, controlling the throttling device to maintain a current opening degree and the compressor to decrease the frequency of the compressor to a transition frequency, and controlling the indoor fan to decrease the rotation speed of the indoor fan to a transition rotation speed for operation, thereby raising the temperature of the indoor heat exchanger while keeping the temperature of the indoor heat exchanger below a preset temperature.

Description

Control method of air conditioner, air conditioner and storage medium

[0001] The present application claims priority to Chinese Patent Application No. 202411028905.X, filed on July 29, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of air conditioners, in particular to a control method of an air conditioner, an air conditioner and a storage medium. BACKGROUND

[0003] The outdoor unit of the air conditioner is prone to frosting when operating in a low-temperature environment, and the air conditioner needs to operate in a defrosting mode to ensure the heating performance of the air conditioner. During the defrosting process of the air conditioner operating in a thin frost rapid melting mode, the indoor heat exchanger can maintain heat transfer to the indoor.

[0004] Currently, the indoor fan in the defrosting mode generally needs to operate at a relatively low defrosting speed. During the process of switching from heating to defrosting mode, the indoor fan directly reduces from the heating speed to the defrosting speed, and the temperature of the indoor heat exchanger is prone to being too high to trigger air conditioner protection shutdown, resulting in that the air conditioner cannot defrost normally. TECHNICAL PROBLEM

[0005] The main purpose of the present application is to provide a control method of an air conditioner, an air conditioner and a storage medium, which aims to ensure the defrosting effect and improve the operation stability of the air conditioner. TECHNICAL SOLUTION

[0006] To achieve the above-mentioned purpose, the present application provides a control method of an air conditioner, the air conditioner comprising a compressor and an indoor heat exchanger, a throttling device and an outdoor heat exchanger connected in sequence, the indoor heat exchanger being correspondingly provided with an indoor fan, and the method comprising:

[0007] controlling the air conditioner to operate in a heating mode;

[0008] if the air conditioner meets a defrosting start condition, controlling the throttling device to maintain the current opening degree, the compressor to reduce the frequency to a transition frequency, and the indoor fan to reduce the speed to a transition speed to operate, so that the temperature of the indoor heat exchanger increases and the temperature of the indoor heat exchanger is less than a preset temperature.

[0009] In some embodiments, the step of controlling the compressor to reduce the frequency to the transition frequency and controlling the indoor fan to reduce the speed to the transition speed to operate comprises:

[0010] controlling the compressor to reduce the frequency to the transition frequency to operate according to a target frequency reduction ratio and / or the temperature of the indoor heat exchanger, and controlling the indoor fan to reduce the speed to the transition speed to operate according to a target speed reduction ratio and / or the temperature of the indoor heat exchanger.

[0011] The target frequency reduction ratio is greater than the target speed reduction ratio.

[0012] In some embodiments, the method further comprises:

[0013] reducing the target frequency reduction ratio according to a preset adjustment parameter to obtain the target speed reduction ratio.

[0014] In some embodiments, after the step of controlling the throttling device to maintain the current opening degree, controlling the compressor to reduce the frequency to the transition frequency, and controlling the indoor fan to reduce the speed to the transition speed, the method further comprises:

[0015] controlling the throttling device to increase to a first defrosting opening degree, controlling the compressor to reduce the frequency to a defrosting frequency, and controlling the indoor fan to reduce the speed to a defrosting speed.

[0016] In some embodiments, the step of controlling the throttling device to increase to a first defrosting opening degree, controlling the compressor to reduce the frequency to a defrosting frequency, and controlling the indoor fan to reduce the speed to a defrosting speed comprises:

[0017] controlling the indoor fan to reduce the speed to the defrosting speed when the air conditioner meets a first preset condition;

[0018] controlling the compressor to reduce the frequency to the defrosting frequency and controlling the throttling device to increase to a second defrosting opening degree when the air conditioner meets a second preset condition;

[0019] controlling the throttling device to increase to the first defrosting opening degree when a first condition is met;

[0020] The first defrosting opening degree is greater than the second defrosting opening degree.

[0021] In some embodiments, before the step of controlling the throttling device to increase to a first defrosting opening degree, controlling the compressor to reduce the frequency to a defrosting frequency, and controlling the indoor fan to reduce the speed to a defrosting speed, the method further comprises:

[0022] obtaining a flow area parameter of the throttling device, a refrigerant flow rate at an inlet side of the throttling device, and a volume parameter of a cylinder of the compressor;

[0023] determining a frequency range of the compressor according to the flow area parameter, the refrigerant flow rate, and the volume parameter;

[0024] determining the defrosting frequency within the frequency range.

[0025] In some embodiments, the step of controlling the throttling device to increase to a first defrosting opening degree, the compressor to decrease to a defrosting frequency, and the indoor fan to decrease to a defrosting rotating speed comprises:

[0026] controlling the throttling device to increase to a first defrosting opening degree, the compressor to decrease to a defrosting frequency, and the indoor fan to decrease to a defrosting rotating speed according to a target ratio;

[0027] wherein the defrosting heat corresponding to the target ratio is greater than or equal to the indoor heat supply of the air conditioner, and / or the difference between the defrosting heat corresponding to the target ratio and the indoor heat supply is less than a preset heat.

[0028] In some embodiments, after the step of controlling the throttling device to increase to a first defrosting opening degree, the compressor to decrease to a defrosting frequency, and the indoor fan to decrease to a defrosting rotating speed, the method further comprises:

[0029] when the air conditioner satisfies a defrosting end condition, controlling the indoor fan to increase to a heating rotating speed, controlling the compressor to increase to a heating frequency, and controlling the throttling device to decrease to a heating opening degree.

[0030] In some embodiments, the step of controlling the indoor fan to increase to a heating rotating speed, controlling the compressor to increase to a heating frequency, and controlling the throttling device to decrease to a heating opening degree comprises:

[0031] controlling the indoor fan to operate at a heating rotating speed, controlling the compressor to increase to a second frequency, and controlling the throttling device to decrease to a transition opening degree;

[0032] when a third condition is satisfied, controlling the compressor to increase to the heating frequency, and controlling the throttling device to decrease to the heating opening degree;

[0033] wherein the second frequency is greater than the defrosting frequency, the second frequency is less than the heating frequency, the transition opening degree is less than the first defrosting opening degree, and the transition opening degree is greater than the heating opening degree.

[0034] In some embodiments, the defrosting end condition comprises at least one of the following: a defrosting time length being greater than or equal to a preset defrosting time length, and a temperature of the outdoor heat exchanger being greater than a preset temperature.

[0035] In addition, to achieve the above object, the application further provides an air conditioner, which comprises a control device, a compressor, and an indoor heat exchanger, a throttling device and an outdoor heat exchanger connected in sequence, wherein the indoor heat exchanger is provided with an indoor fan, and the indoor fan, the throttling device and the compressor are connected with the control device; the control device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the control method of the air conditioner.

[0036] In addition, to achieve the above object, the application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the control method of the air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative labor.

[0039] Fig. 1 is a schematic diagram of the system structure of an embodiment of the air conditioner of the application;

[0040] Fig. 2 is a schematic diagram of the device structure of the hardware running environment involved in the control method of the air conditioner in the embodiment of the application;

[0041] Fig. 3 is a schematic diagram of the flow of an embodiment of the control method of the air conditioner of the application;

[0042] Fig. 4 is a schematic diagram of the flow provided by another embodiment of the control method of the air conditioner of the application;

[0043] Fig. 5 is a schematic diagram of the detailed flow of step S30 in the control method of the air conditioner of the application;

[0044] Fig. 6 is a timing control diagram of the switching of the components involved in the embodiment of the control method of the air conditioner of the application between the heating mode and the defrosting mode.

[0045] The object implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. Embodiments of the application

[0046] It should be understood that the specific embodiments described herein are merely illustrative of the present application and do not limit the present application.

[0047] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings of the specification and specific embodiments.

[0048] The main solution of the embodiment of the present application is: based on an air conditioner, a control method is proposed, the air conditioner includes a compressor and an indoor heat exchanger, a throttling device and an outdoor heat exchanger connected in turn, the indoor heat exchanger is correspondingly provided with an indoor fan, the method includes: controlling the air conditioner to run in heating mode; in the case that the air conditioner meets the defrosting starting condition, controlling the throttling device to keep the current opening, the compressor to reduce the frequency to a transition frequency, and the indoor fan to reduce to a transition speed to run, so that the indoor heat exchanger temperature rises and the indoor heat exchanger temperature is less than a preset temperature.

[0049] In some embodiments, for convenience of description, the following is described with the air conditioner as the execution subject.

[0050] In the prior art, the indoor fan generally needs to run at a low defrosting speed in the defrosting mode, and during the process of switching the air conditioner from heating to defrosting mode, the indoor fan directly reduces from the heating speed to the defrosting speed, and the indoor heat exchanger temperature is easy to be too high to trigger the air conditioner protection shutdown, resulting in that the air conditioner cannot defrost normally.

[0051] The present application provides the above-mentioned solution, when the air conditioner needs to run in defrosting mode during the process of running in heating mode, the speed of the indoor fan is not directly reduced to the defrosting speed, but on the basis of keeping the current opening of the throttling device before entering the defrosting operation, the temperature of the indoor heat exchanger is raised by reducing the indoor fan to a transition speed to run, which can store heat for the subsequent defrosting process, avoid the indoor heat exchanger temperature being too low to cause the indoor temperature to drop sharply during the defrosting process, and reducing the running frequency of the compressor can effectively avoid the indoor heat exchanger temperature being too high, which can effectively reduce the shutdown risk of the air conditioner, based on this, the cooperation of the above-mentioned components can ensure the defrosting effect while improving the running stability of the air conditioner.

[0052] The embodiment of the present application proposes an air conditioner. The air conditioner can include any type of air conditioner such as a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a ceiling-mounted air conditioner, etc.

[0053] In the embodiments of the present application, with reference to FIG. 1 and FIG. 2, the air conditioner comprises a control device 100, a compressor 1, a reversing assembly 2, an indoor heat exchanger 7, a throttling device 4, and an outdoor heat exchanger 3. The indoor heat exchanger 7, the throttling device 4, and the outdoor heat exchanger 3 are sequentially connected. The indoor heat exchanger 7, the outdoor heat exchanger 3, the exhaust port of the compressor 1, and the gas inlet port of the compressor 1 are all connected with the reversing assembly 2. The indoor heat exchanger 7 is correspondingly provided with an indoor fan 8, and the outdoor heat exchanger 3 is correspondingly provided with an outdoor fan 9. The compressor 1, the reversing assembly 2, the throttling device 4, the outdoor fan 9, and the indoor fan 8 are all connected with the control device 100. The throttling device can be an electronic expansion valve.

[0054] The outdoor heat exchanger 3 comprises at least two heat exchange portions, and the at least two heat exchange portions are arranged side by side. In some embodiments, the at least two heat exchange portions are arranged along the airflow direction driven by the outdoor fan 9, and the at least two heat exchange portions are connected in series.

[0055] The reversing assembly 2 can comprise a four-way valve or the like. The reversing assembly 2 has a first state and a second state to realize switching before the refrigerant flows in different directions. When the reversing assembly 2 operates in the first state, the exhaust port of the compressor 1 is communicated with the outdoor heat exchanger 3, the gas inlet port of the compressor 1 is communicated with the indoor heat exchanger 7, and the refrigerant flowing out of the compressor 1 sequentially flows through the outdoor heat exchanger 3, the throttling device 4, and the indoor heat exchanger 7 and then flows back to the compressor 1. When the reversing assembly 2 operates in the second state, the exhaust port of the compressor 1 is communicated with the indoor heat exchanger 7, the gas inlet port of the compressor 1 is communicated with the outdoor heat exchanger 3, and the refrigerant flowing out of the compressor 1 sequentially flows through the indoor heat exchanger 7, the throttling device 4, and the outdoor heat exchanger 3 and then flows back to the compressor 1.

[0056] Based on the above arrangement, the operation modes of the air conditioner at least include the following modes:

[0057] In the heating mode, the reversing assembly 2 operates in the second state, the throttling device 4 operates at the first opening degree, the compressor 1 operates at a heating frequency, the indoor heat exchanger 7 is in a condensing state, and the outdoor heat exchanger 3 is in an evaporating state.

[0058] In the first defrosting mode, the reversing assembly 2 operates in the second state, the throttling device 4 operates at a second opening degree, the second opening degree is greater than the first opening degree, the compressor 1 operates at a first defrosting frequency, the indoor heat exchanger 7 is in a condensing state, and the outdoor heat exchanger 3 melts ice and frost in the space where the outdoor heat exchanger 3 is located by releasing heat.

[0059] In the second defrosting mode, the reversing assembly 2 operates in the second state, the throttling device 4 operates at a third opening degree, the second opening degree is greater than or equal to the third opening degree, the compressor 1 operates at a second defrosting frequency, the first defrosting frequency is greater than the second defrosting frequency, the indoor heat exchanger 7 is in a condensing state, and the outdoor heat exchanger 3 melts ice and frost in the space where the outdoor heat exchanger 3 is located by releasing heat.

[0060] In the cooling mode, the reversing component 2 operates in the first state, the throttling device 4 operates in the fourth opening degree, the compressor 1 operates in the cooling frequency, the indoor heat exchanger 7 is in the evaporating state, and the outdoor heat exchanger 3 is in the condensing state.

[0061] In the third defrosting mode, the reversing component 2 operates in the first state, the throttling device 4 operates in the fifth opening degree, the compressor 1 operates in the third defrosting frequency, the indoor heat exchanger 7 is in the evaporating state, and the outdoor heat exchanger 3 is in the condensing state to melt the ice and frost on the space where the outdoor heat exchanger 3 is located.

[0062] In the cooling mode, the reversing component 2 operates in the first state, the throttling device 4 operates in the fourth opening degree, the compressor 1 operates in the cooling frequency, the indoor heat exchanger 7 is in the evaporating state, and the outdoor heat exchanger 3 is in the condensing state.

[0063] In some embodiments, the second opening degree and the third opening degree are the maximum opening degree of the throttling device 4. In other embodiments, the second opening degree and the third opening degree can also be an opening degree smaller than the maximum opening degree and larger than the first opening degree.

[0064] In some embodiments, referring to FIG. 1, the air conditioner further comprises a refrigerant heat dissipation component 5 and a one-way throttling device 6. The refrigerant heat dissipation component 5 is configured to dissipate heat from the heat-generating components in the air conditioner. The outdoor heat exchanger 3, the throttling device 4, the refrigerant heat dissipation component 5, the one-way throttling device 6, and the indoor heat exchanger 7 are connected in sequence. The one-way throttling device 6 is configured to throttle the refrigerant when the refrigerant flows from the refrigerant heat dissipation component 5 to the indoor heat exchanger 7 and not to throttle the refrigerant when the refrigerant flows from the indoor heat exchanger 7 to the refrigerant heat dissipation component 5.

[0065] In some embodiments, referring to FIG. 2, the air conditioner further comprises a first temperature sensor 01 connected to the control device 100. The temperature sensor 01 can be arranged on the outdoor heat exchanger 3 to detect the temperature thereof. In some embodiments, the temperature sensor 01 can be arranged at at least one of the following temperatures: the inlet of the outdoor heat exchanger 3, the outlet of the outdoor heat exchanger 3, the middle part of the outdoor heat exchanger 3, between different heat exchange parts of the outdoor heat exchanger 3, etc. In some embodiments, the temperature sensor 01 is arranged at the inlet of the outdoor heat exchanger 3 to detect the temperature of the refrigerant at the inlet of the outdoor heat exchanger 3.

[0066] In some embodiments, referring to FIG. 2, the air conditioner further comprises a second temperature sensor 02 connected with the control device 100, and the second temperature sensor 02 can be arranged at the indoor heat exchanger 7 to detect the temperature thereof. The second temperature sensor 02 can be arranged at at least one of the following temperatures: the inlet of the indoor heat exchanger 7, the outlet of the indoor heat exchanger 7, the middle of the indoor heat exchanger 7, between different heat exchange parts of the indoor heat exchanger 7, etc. In some embodiments, the second temperature sensor 02 is arranged at the inlet of the indoor heat exchanger 7 to detect the refrigerant temperature at the inlet of the indoor heat exchanger 7.

[0067] Referring to FIG. 2, the control device 100 of the air conditioner comprises at least one processor 1001, and a memory 1002 and a timer 1003 in communication connection with the at least one processor 1001; the memory 1002 stores instructions executable by the at least one processor 1001, and the instructions are executed by the at least one processor 1001 to enable the at least one processor 1001 to perform the control method of the air conditioner in the above-mentioned embodiment one.

[0068] Referring to FIG. 2, a structure schematic diagram of the control device 100 suitable for implementing the embodiments of the present application is shown. The air conditioner in the embodiments of the present application can include but is not limited to mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistant), PADs (Portable Application Description), PMPs (Portable Media Player), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. The control device 100 shown in FIG. 2 is only an example, and should not bring any limitation to the functions and use range of the embodiments of the present application.

[0069] As shown in FIG. 2, the control device 100 can include a processor 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to programs stored in a memory 1002, which can be programs in a read only memory (ROM) or programs loaded from a storage device into a random access memory (RAM). In the RAM, various programs and data required for the operation of the control device 100 are also stored. The processor 1001, the memory 1002 (ROM and RAM), and the like are connected to each other through a bus. An input / output (I / O) interface is also connected to the bus. Generally, the following systems can be connected to the I / O interface: input devices including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, and the like; output devices including, for example, a liquid crystal display (LCD), a speaker, a vibrator, and the like; storage devices including, for example, a magnetic tape, a hard disk, and the like; and communication devices. The communication devices can allow the control device 100 to communicate with other devices wirelessly or by wire to exchange data. Although the control device 100 having various systems is shown in the drawing, it should be understood that all of the systems shown are not required to be implemented or possessed. More or less systems can be alternatively implemented or possessed.

[0070] In particular, according to the embodiments disclosed in the present application, the method flow described in the above embodiments can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program codes for executing the method shown in the flow chart. In such embodiments, the computer program can be downloaded and installed from a network through a communication device, or installed from the memory 1002. When the computer program is executed by the processor 1001, the above-mentioned functions defined in the control method of the air conditioner of the embodiments disclosed in the present application are performed.

[0071] The air conditioner provided in the present application adopts the control method of the air conditioner in the above embodiments, and can solve the technical problem of how to ensure the defrosting effect while reducing the indoor temperature fluctuation. Compared with the prior art, the air conditioner provided in the present application has the same beneficial effects as the control method of the air conditioner provided in the above embodiments, and other technical features in the air conditioner are the same as the features disclosed in the above embodiments, which will not be repeated here.

[0072] It should be noted that the execution subject of the embodiments of the present application can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device, an air conditioner, etc. capable of realizing the above functions. The embodiments of the present application and the following embodiments will be described below taking the air conditioner as an example.

[0073] Based on this, the present application provides a control method of an air conditioner. Referring to FIG. 3, FIG. 3 is a flowchart of an embodiment of the control method of the air conditioner of the present application.

[0074] In the embodiments of the present application, the control method of the air conditioner comprises steps S10-S20:

[0075] Step S10, control the air conditioner to run in a heating mode;

[0076] During the running of the air conditioner in the heating mode, the reversing component runs in the second state, the throttling device runs at the throttling opening degree, the compressor runs at a heating frequency, and the refrigerant discharged by the compressor flows back to the compressor in sequence through the indoor heat exchanger, the throttling device and the outdoor heat exchanger, the indoor heat exchanger is in a condensing state, and the outdoor heat exchanger is in an evaporating state.

[0077] Step S20, in the case where the air conditioner meets a defrosting starting condition, control the throttling device to maintain the current opening degree, the compressor to reduce the frequency to a transition frequency, and the indoor fan to reduce the rotation speed to a transition rotation speed to run, so as to increase the temperature of the indoor heat exchanger and make the temperature of the indoor heat exchanger less than a preset temperature.

[0078] During the execution of step S20, the difference between the current coil temperature of the outdoor heat exchanger and the heating coil temperature of the outdoor heat exchanger when the air conditioner runs in the heating mode is less than a set temperature value, and the set temperature value is less than or equal to 3℃. In this way, the degree of frosting of the outdoor heat exchanger can be avoided from being aggravated, and the subsequent defrosting operation is facilitated.

[0079] The defrosting starting condition includes the conditions required to be met by the running parameters of the air conditioner itself and / or the environmental parameters of the environment where the air conditioner is located when the outdoor heat exchanger needs to be defrosted in the heating mode. For example, the outdoor environment temperature is lower than a preset environmental temperature threshold and / or the temperature of the outdoor heat exchanger is lower than a preset temperature threshold, etc.

[0080] In the case where the air conditioner meets the defrosting starting condition, the reversing component can be controlled to maintain the current state to run.

[0081] The transition frequency and the transition rotating speed can be preset fixed parameters, or parameters determined according to the actual operation of the air conditioner. For example, the transition rotating speed can be obtained by reducing the heating rotating speed of the indoor fan in the heating mode according to a preset rotating speed adjustment value, and the transition frequency can be obtained by reducing the heating frequency of the compressor in the heating mode according to a preset frequency adjustment value.

[0082] The preset temperature is the maximum temperature of the indoor heat exchanger allowed by the reliability of the air conditioner.

[0083] The current opening degree of the throttling device is the heating opening degree of the throttling device during the operation of the air conditioner in the heating mode.

[0084] The compressor can continuously reduce the frequency from the heating frequency to the transition frequency at a target frequency reduction rate, or can reduce the frequency from the heating frequency to the transition frequency in stages. The indoor fan can continuously reduce the rotating speed from the heating rotating speed to the transition rotating speed at a target rotating speed reduction rate, or can reduce the rotating speed from the heating rotating speed to the transition rotating speed in stages.

[0085] In some embodiments, the indoor fan is operated at the transition rotating speed while the compressor is operated at the transition frequency. In other implementations, the compressor can be operated at the transition frequency for a period of time before the indoor fan is operated at the transition rotating speed.

[0086] The embodiments of the present application provide a control method of an air conditioner. When the air conditioner needs to be defrosted during the operation in the heating mode, the rotating speed of the indoor fan is not directly reduced to the defrost rotating speed, but the indoor fan is operated at the transition rotating speed to increase the temperature of the indoor heat exchanger on the basis of the current opening degree of the throttling device before entering the defrost operation, which can store heat for the subsequent defrosting process and avoid the indoor temperature from being greatly reduced due to the low temperature of the indoor heat exchanger during the defrosting process. Reducing the operating frequency of the compressor can effectively avoid the high temperature of the indoor heat exchanger and effectively reduce the shutdown risk of the air conditioner. Therefore, the cooperation of the above components can ensure the defrosting effect and improve the operation stability of the air conditioner.

[0087] In a possible implementation, the steps of controlling the compressor to reduce the frequency to the transition frequency and controlling the indoor fan to reduce the rotating speed to the transition rotating speed include:

[0088] The compressor is controlled to reduce the frequency to the transition frequency according to a target frequency reduction ratio and / or the temperature of the indoor heat exchanger, and the indoor fan is controlled to reduce the rotating speed to the transition rotating speed according to a target rotating speed reduction ratio and / or the temperature of the indoor heat exchanger.

[0089] The target frequency reduction ratio is greater than the target rotating speed reduction ratio.

[0090] The target frequency reduction ratio is the ratio of the amplitude of the compressor frequency reduction to the heating frequency of the compressor in the heating mode, and the target speed reduction ratio is the ratio of the amplitude of the indoor fan speed reduction to the heating rotating speed of the indoor fan in the heating mode. The transition frequency is determined according to the heating frequency and the target frequency reduction ratio; and the transition rotating speed is determined according to the heating rotating speed and the target speed reduction ratio.

[0091] The target frequency reduction ratio and the target speed reduction ratio satisfy a preset quantity relationship. In some embodiments, the target speed reduction ratio is obtained by reducing the target frequency reduction ratio according to a preset adjustment parameter. For example, the preset adjustment parameter is 0.8, and the target speed reduction ratio = 0.8*target frequency reduction ratio.

[0092] The purpose of controlling the compressor to operate at a reduced frequency and controlling the indoor fan to operate at a reduced speed according to the temperature of the indoor heat exchanger is to ensure that the temperature of the indoor heat exchanger is not higher than a preset temperature. In the process of the compressor operating at a reduced frequency, when the temperature of the indoor heat exchanger is less than the preset temperature, the compressor maintains the reduced frequency to operate at the transition frequency; when the temperature of the indoor heat exchanger is greater than or equal to the preset temperature, the compressor stops reducing the frequency and maintains the current frequency. In the process of the indoor fan operating at a reduced speed, when the temperature of the indoor heat exchanger is less than the preset temperature, the indoor fan maintains the reduced speed to operate at the transition rotating speed; when the temperature of the indoor heat exchanger is greater than or equal to the preset temperature, the indoor fan stops reducing the speed and maintains the current rotating speed. Alternatively, the target frequency reduction ratio can be determined according to the initial temperature of the indoor heat exchanger when the defrosting start condition is met, the target speed reduction ratio is obtained by reducing the target frequency reduction ratio according to a preset adjustment parameter; or the target speed reduction ratio can be determined according to the initial temperature of the indoor heat exchanger when the defrosting start condition is met, and the target frequency reduction ratio is determined according to the preset adjustment parameter and the target speed reduction ratio.

[0093] In some embodiments, by the above method, the heat storage amount can be ensured to improve the defrosting efficiency, and the system operation reliability can be ensured.

[0094] Based on any of the above embodiments, in another embodiment of the present application, the same or similar contents as the above embodiments can be referred to the above introduction, and will not be described in detail. On this basis, please refer to FIG. 4 and FIG. 6, after the step of controlling the throttling device to maintain the current opening degree, the compressor to operate at the transition frequency, and the indoor fan to operate at the transition rotating speed, the method further comprises:

[0095] Step S30, control the throttling device to increase to the first defrosting opening degree, the compressor to operate at the defrosting frequency, and the indoor fan to operate at the defrosting rotating speed.

[0096] The first defrosting opening degree herein can include the second opening degree or the third opening degree described above, and the throttling device can be increased from the first opening degree to the second opening degree or from the first opening degree to the third opening degree. When the throttling device operates at the second opening degree, the air conditioner is in the first defrosting mode, and when the throttling device operates at the third opening degree, the air conditioner is in the second defrosting mode.

[0097] In an implementation manner, the indoor fan is controlled to be gradually reduced from the transition speed to the defrosting speed. In another implementation manner, the indoor fan is controlled to continuously reduce the speed from the transition speed to the defrosting speed.

[0098] During the process that the indoor fan is reduced to operate at the defrosting speed, the throttling device is increased in opening degree or maintained to operate at the heating opening degree, and the compressor can be reduced in frequency or maintained to operate at the heating frequency.

[0099] In some embodiments, the indoor fan is first reduced to operate at the defrosting speed, and the steps of controlling the throttling device to be increased to the first defrosting opening degree and the compressor to be reduced to the defrosting frequency are performed during the process that the indoor fan is maintained to operate at the defrosting speed. In other embodiments, the indoor fan can also be reduced to the defrosting speed during the process that the throttling device is increased to the first defrosting opening degree and the compressor is reduced to the defrosting frequency.

[0100] During the process that the indoor fan operates at the defrosting speed, the throttling device is controlled to be gradually increased in opening degree to the first defrosting opening degree, that is, the throttling device is increased to at least one intermediate opening degree and maintained to operate for a corresponding preset time length, and then increased to the first defrosting opening degree to operate. The throttling device is gradually increased in opening degree to the first defrosting opening degree, which can effectively avoid that the opening degree is changed too fast to cause the system to lack oil, and can also control the migration speed of the refrigerant to ensure the balance between the indoor heating and the defrosting heat extraction of the outdoor heat exchanger, reduce the refrigerant sound caused by the migration of the refrigerant being too fast, thereby effectively reducing the reliability risk in the defrosting process, improving the defrosting effect, and reducing the refrigerant sound. During the process that the throttling device is gradually increased in opening degree to the first defrosting opening degree, the compressor is continuously reduced in frequency to the defrosting frequency. In other embodiments, the throttling device can be continuously increased in opening degree to the first defrosting opening degree, and the compressor can be gradually reduced in frequency to the defrosting frequency.

[0101] In some embodiments, the throttling device, the indoor fan, and the compressor are cooperatively operated to balance the ratio of the defrosting heat of the outdoor heat exchanger to the indoor heating amount, so as to reduce the situation that the defrosting heat is too much and the indoor heating amount is insufficient or the defrosting heat is insufficient and the indoor heating amount is too much, thereby ensuring the defrosting effect while reducing the indoor temperature fluctuation.

[0102] In an implementation, the step of controlling the throttling device to increase to the first defrosting opening degree, controlling the compressor to reduce to the defrosting frequency, and controlling the indoor fan to reduce to the defrosting rotating speed includes: controlling the throttling device to increase to the first defrosting opening degree, controlling the compressor to reduce to the defrosting frequency, and controlling the indoor fan to reduce to the defrosting rotating speed according to a target ratio, wherein the defrosting heat corresponding to the target ratio is greater than or equal to the indoor heat supply of the air conditioner, and / or the difference between the defrosting heat and the indoor heat supply corresponding to the target ratio is less than a preset heat.

[0103] The defrosting heat is the heat released by the outdoor heat exchanger for defrosting. The indoor heat supply is the heat released by the indoor heat exchanger and sent into the indoor space under the driving of the indoor fan.

[0104] The target ratio is a ratio that ensures that the outdoor heat exchanger completes defrosting within a preset time length and the indoor temperature fluctuation value is less than a preset temperature value, for example, the preset temperature value is 3°C. The preset time length is in the range of [130s, 180s].

[0105] The target ratio is in the range of [1, 2], for example, the target ratio is 1.2, etc. Based on this, the defrosting requirement and the indoor comfort requirement can be ensured at the same time.

[0106] In some embodiments, the control mode of controlling the above components according to the target ratio includes but is not limited to at least one of the following: control of the opening degree change process (continuous increase of the opening degree or segmented increase of the opening degree, setting of the intermediate opening degree when the opening degree is increased in segments, target rate of opening degree change, etc.), setting of the first defrosting opening degree, timing of the increase of the opening degree; control of the frequency change process (continuous reduction of the frequency or segmented reduction of the frequency, setting of the intermediate frequency when the frequency is reduced in segments, target rate of frequency change, etc.), setting of the defrosting frequency, timing of the reduction of the frequency; control of the rotating speed change process (continuous reduction of the rotating speed or segmented reduction of the rotating speed, setting of the intermediate rotating speed when the rotating speed is reduced in segments, target rate of rotating speed change, etc.), setting of the defrosting rotating speed, timing of the reduction of the rotating speed, etc.

[0107] In some embodiments, by the above mode, the accuracy of the distribution of the indoor heat supply and the defrosting heat can be further improved, and the defrosting effect and the indoor comfort can be effectively considered.

[0108] In an implementation, in combination with FIGS. 5 and 6, the step of controlling the throttling device to increase to the first defrosting opening degree, controlling the compressor to reduce to the defrosting frequency, and controlling the indoor fan to reduce to the defrosting rotating speed includes steps S31 to S33:

[0109] Step S31: in the case where the air conditioner meets a first preset condition, controlling the indoor fan to reduce to the defrosting rotating speed.

[0110] In some embodiments, the first preset condition comprises that the accumulated time length reaches a first preset time length, wherein the accumulated time length is counted from the starting time when the air conditioner meets the defrost starting condition, the first preset time length is the sum of a preset transition time length and an instruction time length, the transition time length is a preset total time length for the air conditioner to perform the steps of controlling the throttling device to maintain the current opening degree, the compressor to reduce the frequency to the transition frequency, and the indoor fan to reduce to the transition rotating speed after meeting the defrost starting condition, and the instruction time length is the time length required for the outdoor unit of the air conditioner to send the instruction of “indoor fan reducing to defrost rotating speed” to the indoor unit to receive the instruction.

[0111] In step S32, when the air conditioner meets the second preset condition, the compressor is controlled to reduce the frequency to the defrost frequency and the throttling device is controlled to increase to the second defrost opening degree; wherein the first defrost opening degree is greater than the second defrost opening degree.

[0112] In some embodiments, the second preset condition comprises that the accumulated time length reaches a second preset time length, wherein the accumulated time length is counted from the starting time when the air conditioner meets the defrost starting condition, the second preset time length is the sum of the first preset time length and a third preset time length, and the third preset time length is the time length for the indoor fan to run at the defrost rotating speed before the air conditioner enters the defrost mode.

[0113] During the process of the indoor fan maintaining the defrost rotating speed, the compressor is controlled to reduce the frequency and the throttling device is controlled to increase the opening degree.

[0114] In some embodiments, the compressor is controlled to increase the opening degree to the second defrost opening degree while the compressor is controlled to reduce the frequency to the defrost frequency, wherein the time length required for the compressor to reduce the frequency from the current frequency to the defrost frequency is the same as the time length required for the throttling device to increase the opening degree from the heating opening degree to the second defrost opening degree.

[0115] In step S33, when the first condition is met, the throttling device is controlled to increase to the first defrost opening degree.

[0116] In some embodiments, the first condition can comprise that the counted time length reaches a fourth preset time length, and the counted time length is counted from the starting time when the air conditioner meets the second preset condition. In other embodiments, when the temperature of the indoor heat exchanger is greater than a first preset temperature and the temperature change value of the indoor heat exchanger is less than a preset value, it can be considered that the first condition is met.

[0117] The first defrosting opening degree and the second defrosting opening degree can be a pre-set fixed opening degree, or an opening degree determined according to the actual operation of the air conditioner. For example, the defrosting frequency, the defrosting rotating speed, the first defrosting opening degree and the second defrosting opening degree herein can be determined according to the temperature difference between the outdoor environment temperature and the indoor environment temperature, and the temperature difference between the indoor environment temperature and the set temperature.

[0118] In some embodiments, after step S33, the compressor can maintain the defrosting frequency operation, the indoor fan can maintain the defrosting rotating speed operation, and the throttling device can maintain the first defrosting opening degree operation until the defrosting end condition is reached.

[0119] In some embodiments, the indoor fan rotating speed regulation, the compressor frequency regulation and the opening degree adjustment of the throttling device are cooperated with each other in the above-mentioned manner, so as to ensure that the ratio of the defrosting heat and the indoor heating capacity can reach the target ratio, thereby ensuring the defrosting effect while reducing the indoor temperature fluctuation. In the stable state of the indoor fan rotating speed, adjusting the compressor frequency and the opening degree of the throttling device is beneficial to improve the accuracy of the distribution of the indoor heating capacity and the outdoor defrosting heat.

[0120] In other embodiments, after step S33, the actual ratio of the defrosting heat and the indoor heating capacity can be determined according to the outdoor heat exchanger temperature and the air conditioner outlet temperature, and the compressor operating frequency and / or the indoor fan operating rotating speed can be adjusted according to the deviation value of the actual ratio and the target ratio, so as to further ensure that the actual ratio can reach the target ratio, thereby ensuring the defrosting effect while reducing the indoor temperature fluctuation. The actual ratio herein can be determined according to the relationship between the real-time detected outdoor heat exchanger temperature and the indoor heat exchanger temperature.

[0121] Based on any of the above embodiments, in another embodiment of the present application, the same or similar contents as the above embodiments can be referred to the above introduction, and will not be described in detail hereinafter. On this basis, in some embodiments, before the step of controlling the throttling device to increase to the first defrosting opening degree, controlling the compressor to reduce to the defrosting frequency, and controlling the indoor fan to reduce to the defrosting rotating speed operation, further comprising: acquiring the flow area parameter of the throttling device, the refrigerant flow rate at the inlet side of the throttling device, and the volume parameter of the cylinder of the compressor; determining the frequency range of the compressor according to the flow area parameter, the refrigerant flow rate and the volume parameter; determining the defrosting frequency in the frequency range.

[0122] The flow area parameter is a characteristic parameter representing the flow area of the throttling device when operating at the first defrosting opening degree. The flow area parameter includes at least one of the following: flow area, throttling device caliber, defrosting opening degree, throttling device inlet and outlet pressure difference, etc.

[0123] The refrigerant flow rate can be detected by a flow rate sensor arranged at the inlet side of the throttling device.

[0124] The volume parameter is a characteristic parameter representing the volume of the cylinder. The volume parameter can include volume, cylinder inner diameter, cylinder length, width, height, etc.

[0125] In some embodiments, the upper limit value and / or the lower limit value of the frequency are determined according to the volume parameter, the flow area parameter, and the refrigerant flow rate, and a range corresponding to the upper limit value and / or the lower limit value of the frequency is taken as the frequency range.

[0126] In some embodiments, by the above-mentioned manner, the indoor thermal comfort and the outdoor defrosting effect can be considered at the same time, and the system energy efficiency is improved.

[0127] Based on any of the above-mentioned embodiments, in another embodiment of the present application, the same or similar contents as the above-mentioned embodiments can be referred to the above-mentioned introduction, and the subsequent will not be described in detail. On this basis, after step S30, it further includes:

[0128] When the air conditioner meets the defrosting end condition, the indoor fan is controlled to run at a heating rotation speed, the compressor is controlled to run at a heating frequency, and the throttling device is controlled to reduce the opening degree to a heating opening degree.

[0129] The defrosting end condition is a condition required to be met by a state parameter of the outdoor heat exchanger itself and / or an environmental parameter of an environment where the outdoor heat exchanger is located when the outdoor heat exchanger completes defrosting.

[0130] In some embodiments, the defrosting end condition includes at least one of the following: the defrosting time length is greater than or equal to a preset defrosting time length, and the temperature of the outdoor heat exchanger is greater than a preset temperature. In other embodiments, the defrosting end condition can also include that the outdoor environment temperature is greater than a preset environment temperature.

[0131] In some embodiments, the defrosting time length is counted from the starting time when the opening degree of the throttling device is increased.

[0132] The preset defrosting time length is in the range of [130s, 180s], for example, 155s, etc. The preset temperature is 2℃, etc.

[0133] The heating rotation speed, the heating frequency, and the heating opening degree are all operating parameters of the corresponding components in the heating mode of the air conditioner.

[0134] The indoor fan can be directly increased to the heating rotation speed, or the rotation speed can be increased to the heating rotation speed in stages.

[0135] The compressor can be directly increased to the heating frequency, or the frequency can be increased to the heating frequency in stages.

[0136] The throttling device can be directly reduced to the heating opening degree, or the opening degree can be reduced to the heating opening degree in stages.

[0137] In some embodiments, in combination with Fig. 6, the indoor fan is controlled to operate at a heating rotation speed, the compressor is controlled to operate at a second frequency, and the throttling device is controlled to reduce the opening degree to a transition opening degree; when a third condition is met, the compressor is controlled to operate at the heating frequency, and the throttling device is controlled to reduce the opening degree to the heating opening degree; wherein the second frequency is greater than the defrosting frequency, the second frequency is less than the heating frequency, the transition opening degree is less than the first defrosting opening degree, and the transition opening degree is greater than the heating opening degree.

[0138] In some embodiments, by the above method, after the defrosting is completed, each component returns to the heating parameters to operate, which is beneficial to ensure normal heating of the system and meet the heating demand of the indoor user. Wherein, the defrosting completion condition is set as above, which can effectively balance the indoor comfort and the outdoor defrosting effect; after the defrosting is completed, the compressor is segmented to increase the frequency, and the throttling device is segmented to reduce the opening degree, which is beneficial to the system operation stability and reliability on the one hand, and is beneficial to further improve the defrosting effect of the outdoor heat exchanger on the other hand.

[0139] It should be noted that the above examples are only used for understanding the present application and do not constitute a limitation on the control method of the air conditioner of the present application. Based on this technical concept, more forms of simple transformation are within the protection scope of the present application.

[0140] The present application provides a computer readable storage medium having computer readable program instructions (i.e. computer programs) stored thereon, the computer readable program instructions being used to execute the control method of the air conditioner in the above embodiments.

[0141] The computer readable storage medium provided in the present application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination thereof. More specific examples of the computer readable storage medium can include, but are not limited to, an electric connection with one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In some embodiments, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted by any suitable medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), etc., or any suitable combination thereof.

[0142] The above computer readable storage medium can be contained in the air conditioner; or can exist separately without being assembled into the air conditioner.

[0143] The above computer readable storage medium carries one or more programs, which, when executed by the air conditioner, cause the air conditioner to perform the following processes: controlling the air conditioner to run in a heating mode; in a case where the air conditioner meets a defrosting starting condition, controlling the throttling device to maintain a current opening degree, the compressor to reduce to a transition frequency, and the indoor fan to reduce to a transition rotating speed to run, so as to increase the indoor heat exchanger temperature and make the indoor heat exchanger temperature less than a preset temperature.

[0144] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0145] The readable storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e. computer program) for executing the control method of the air conditioner, and can solve the technical problem of how to ensure the defrosting effect while reducing the indoor temperature fluctuation. Compared with the prior art, the computer readable storage medium provided by the present application has the same beneficial effects as the control method of the air conditioner provided by the above-mentioned embodiments, which will not be repeated here.

[0146] The flowcharts and block diagrams in the drawings illustrate the possible architectures, functionality, and operations of systems, methods, and computer program products in accordance with various embodiments of the present application. In this regard, each block in the flowcharts or block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently or in the reverse order, depending on the functionality involved. It will also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by special purpose hardware-based systems that perform the specified functions or operations, or combinations of special purpose hardware and computer instructions.

[0147] It should be understood that each part of the present application can be realized by hardware, software, firmware or a combination thereof. The modules described in the embodiments of the present application can be realized by software or hardware. In some cases, the name of the module does not constitute a limitation on the unit itself. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0148] The above only describes some embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A control method of an air conditioner, wherein, The air conditioner comprises a compressor, an indoor heat exchanger, a throttling device and an outdoor heat exchanger connected in sequence, and the indoor heat exchanger is provided with an indoor fan, and the method comprises the following steps: controlling the air conditioner to operate in a heating mode; if the air conditioner meets defrosting starting conditions, controlling the throttling device to keep the current opening degree, the compressor to reduce the frequency to a transition frequency, and the indoor fan to reduce the rotation speed to a transition rotation speed to operate, so as to increase the temperature of the indoor heat exchanger and make the temperature of the indoor heat exchanger less than a preset temperature.

2. The method of claim 1, wherein, controlling the compressor to reduce the frequency to a transition frequency and the indoor fan to reduce the rotation speed to a transition rotation speed to operate, which comprises the following steps: controlling the compressor to reduce the frequency to the transition frequency according to a target frequency reduction ratio and / or the temperature of the indoor heat exchanger, and controlling the indoor fan to reduce the rotation speed to the transition rotation speed according to a target rotation speed reduction ratio and / or the temperature of the indoor heat exchanger; wherein the target frequency reduction ratio is greater than the target rotation speed reduction ratio.

3. The method of claim 2, wherein, The method further comprises the following steps: reducing the target frequency reduction ratio according to a preset adjustment parameter to obtain the target rotation speed reduction ratio.

4. The method of any one of claims 1 to 3, wherein, After the step of controlling the throttling device to keep the current opening degree, the compressor to reduce the frequency to a transition frequency, and the indoor fan to reduce the rotation speed to a transition rotation speed to operate, the method further comprises the following steps: controlling the throttling device to increase to a first defrosting opening degree, the compressor to reduce the frequency to a defrosting frequency, and the indoor fan to reduce the rotation speed to a defrosting rotation speed to operate.

5. The method of claim 4, wherein, The step of controlling the throttling device to increase to a first defrosting opening degree, the compressor to reduce the frequency to a defrosting frequency, and the indoor fan to reduce the rotation speed to a defrosting rotation speed to operate, comprises the following steps: if the air conditioner meets a first preset condition, controlling the indoor fan to reduce the rotation speed to a defrosting rotation speed to operate; if the air conditioner meets a second preset condition, controlling the compressor to reduce the frequency to the defrosting frequency to operate, and controlling the throttling device to increase to a second defrosting opening degree to operate; if a first condition is met, controlling the throttling device to increase to the first defrosting opening degree; wherein the first defrosting opening degree is greater than the second defrosting opening degree.

6. The method of claim 4 or 5, wherein, Before the step of controlling the throttling device to increase to a first defrosting opening degree, the compressor to reduce the frequency to a defrosting frequency, and the indoor fan to reduce the rotation speed to a defrosting rotation speed to operate, the method further comprises the following steps: obtaining a flow area parameter of the throttling device, a refrigerant flow rate at the inlet side of the throttling device, and a volume parameter of the cylinder of the compressor; determining a frequency range of the compressor according to the flow area parameter, the refrigerant flow rate and the volume parameter; determining the defrosting frequency within the frequency range.

7. The method of any one of claims 4 to 6, wherein, The step of controlling the throttling device to increase to a first defrosting opening degree, the compressor to reduce the frequency to a defrosting frequency, and the indoor fan to reduce the rotation speed to a defrosting rotation speed to operate, comprises the following steps: controlling the throttling device to increase to a first defrosting opening degree, the compressor to reduce the frequency to a defrosting frequency, and the indoor fan to reduce the rotation speed to a defrosting rotation speed to operate according to a target ratio; The defrosting heat corresponding to the target ratio is greater than or equal to the indoor heat supply of the air conditioner, and / or the difference between the defrosting heat corresponding to the target ratio and the indoor heat supply is less than a preset heat.

8. The method of claim 7, wherein, After the step of controlling the throttling device to increase to the first defrosting opening degree, the compressor to reduce to the defrosting frequency, and the indoor fan to reduce to the defrosting rotating speed, the method further comprises: When the air conditioner satisfies a defrosting end condition, controlling the indoor fan to increase to a heating rotating speed, controlling the compressor to increase to a heating frequency, and controlling the throttling device to decrease to a heating opening degree.

9. The method of claim 8, wherein, The step of controlling the indoor fan to increase to a heating rotating speed, controlling the compressor to increase to a heating frequency, and controlling the throttling device to decrease to a heating opening degree comprises: controlling the indoor fan to operate at a heating rotating speed, controlling the compressor to increase to a second frequency, and controlling the throttling device to decrease to a transition opening degree; When a third condition is satisfied, controlling the compressor to increase to the heating frequency and controlling the throttling device to decrease to the heating opening degree; The second frequency is greater than the defrosting frequency, the second frequency is less than the heating frequency, the transition opening degree is less than the first defrosting opening degree, and the transition opening degree is greater than the heating opening degree.

10. The method of claim 8 or 9, wherein, The defrosting end condition comprises at least one of the following: a defrosting time length being greater than or equal to a preset defrosting time length, and a temperature of the outdoor heat exchanger being greater than a preset temperature.

11. An air conditioner wherein, The air conditioner comprises a control device, a compressor, and an indoor heat exchanger, a throttling device, and an outdoor heat exchanger connected in sequence, the indoor heat exchanger is provided with an indoor fan, the indoor fan, the throttling device, and the compressor are connected to the control device, and the control device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program is configured to implement the steps of the control method of the air conditioner according to any one of claims 1 to 10.

12. A storage medium, wherein, The storage medium is a computer readable storage medium, the storage medium stores a computer program, and the computer program is executed by the processor to implement the steps of the control method of the air conditioner according to any one of claims 1 to 10.

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