Control Method, Device, Air Conditioner and Storage Medium for Self-Cleaning of Air Conditioner

Abstract

The present invention provides a control method, device, air conditioner and storage medium for self-cleaning of an air conditioner, including: receiving a first input from a user when it is determined that a target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than a target temperature threshold; the first input is used to turn on the self-cleaning mode, and the target heating device is used to heat the flowing refrigerant; in response to the first input, controlling the opening and closing of the ports of a first three-way valve and a second three-way valve in the air conditioner to form a first refrigerant circulation loop, and executing a first self-cleaning mode to clean the indoor unit of the air conditioner; after the first self-cleaning mode operation ends, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a second refrigerant circulation loop, and executing a second self-cleaning mode to clean the outdoor unit of the air conditioner. The present invention can achieve cleaning of the indoor unit and the outdoor unit, and can effectively improve the self-cleaning efficiency of the outdoor unit of the air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to a control method, device, air conditioner and storage medium for self-cleaning of an air conditioner. Background Art

[0002] After the air conditioner is placed or used for a long time, the dust accumulated on its indoor unit and outdoor unit will gradually increase. When the accumulated dust reaches a certain level, it will affect the performance of the air conditioner and even breed a large number of bacteria, affecting the health of users. Therefore, it is necessary to clean the air conditioner in time.

[0003] In the prior art, the air conditioner is operated in the cooling mode to make the surface of the heat exchanger frost, and then defrost and clean the heat exchanger. However, when the self-cleaning function of the air conditioner is turned on in winter, due to the low outdoor ambient temperature, it is easy to freeze when performing self-cleaning of the outdoor unit, resulting in poor self-cleaning efficiency of the outdoor unit.

[0004] Therefore, how to better control the air conditioner for self-cleaning has become an urgent technical problem in the industry. Summary of the Invention

[0005] The present invention provides a control method, device, air conditioner and storage medium for self-cleaning of an air conditioner to better control the air conditioner for self-cleaning.

[0006] The present invention provides a control method for self-cleaning of an air conditioner, including:

[0007] When it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, receiving a first input from the user; the first input is used to turn on the self-cleaning mode, and the target heating device is used to heat the flowing refrigerant;

[0008] In response to the first input, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a first refrigerant circulation loop, and executing a first self-cleaning mode to clean the indoor unit of the air conditioner;

[0009] After the first self-cleaning mode runs to an end, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a second refrigerant circulation loop, and executing a second self-cleaning mode to clean the outdoor unit of the air conditioner;

[0010] In the first refrigerant circulation loop, the path of the refrigerant circulating and flowing is: compressor, condenser, electronic expansion valve, evaporator, the compressor;

[0011] Under the second refrigerant circulation circuit, the path of the refrigerant circulation flow is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor.

[0012] According to a control method for self-cleaning of an air conditioner provided by the present invention, the method further includes:

[0013] When it is determined that the target heating device is in an operating state and the outdoor ambient temperature is greater than the target temperature threshold, receive a second input from the user; the second input is used to turn on the third self-cleaning mode;

[0014] In response to the second input, control the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a third refrigerant circulation circuit, and execute the third self-cleaning mode to clean the indoor unit of the air conditioner;

[0015] Under the third refrigerant circulation circuit, the path of the refrigerant circulation flow is the compressor, the condenser, the target heating device, the electronic expansion valve, the evaporator, the target heating device, and the compressor;

[0016] After the third self-cleaning mode operation ends, control the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form the first refrigerant circulation circuit, and execute the fourth self-cleaning mode to clean the outdoor unit of the air conditioner.

[0017] According to a control method for self-cleaning of an air conditioner provided by the present invention, executing the first self-cleaning mode includes:

[0018] Enter the first frosting stage;

[0019] In the first frosting stage, the air conditioner performs refrigeration under the first refrigerant circulation circuit, the compressor operates at a first target frequency, the indoor unit fan is in a stopped state, and the outdoor unit fan is in an operating state. The target frequency is determined based on the outdoor ambient temperature;

[0020] When the operation duration of the first frosting stage exceeds the first duration threshold, enter the first defrosting stage;

[0021] In the first defrosting stage, the air conditioner switches from the refrigeration mode to the heating mode, the indoor unit fan operates at the maximum wind speed, and the operation duration is the second duration threshold;

[0022] After the first defrosting stage ends, stop operating the first self-cleaning mode; the first self-cleaning mode includes the first frosting stage and the first defrosting stage.

[0023] A control method for self-cleaning of an air conditioner provided by the present invention, the execution of the second self-cleaning mode includes:

[0024] Enter the second frosting stage;

[0025] In the second frosting stage, the air conditioner performs heating under the second refrigerant circulation circuit, the compressor operates at a second target frequency, the indoor unit fan operates at a preset wind speed, the opening degree of the electronic expansion valve is adjusted to a first target opening degree, and the outdoor unit fan is in a stopped operating state;

[0026] When the operation duration in the second frosting stage exceeds a third duration threshold, enter the second defrosting stage of the second self-cleaning mode;

[0027] In the second defrosting stage, the outdoor unit fan operates at the maximum wind speed and uses a fourth duration threshold as the operation duration;

[0028] After the end of the second defrosting stage, stop operating the second self-cleaning mode and record the start time of the first self-cleaning mode; the second self-cleaning mode includes the second frosting stage and the second defrosting stage.

[0029] A control method for self-cleaning of an air conditioner provided by the present invention, the execution of the third self-cleaning mode includes:

[0030] Enter the third frosting stage;

[0031] In the third frosting stage, the air conditioner performs cooling under the third refrigerant circulation circuit, the compressor operates at a third target frequency, the indoor unit fan is in a stopped operating state, and the outdoor unit fan is in an operating state;

[0032] When the operation duration in the third frosting stage exceeds a fifth duration threshold, enter the third defrosting stage;

[0033] In the third defrosting stage, the air conditioner switches from the cooling mode to the heating mode, the indoor unit fan is in an operating state, and the indoor unit fan uses a sixth duration threshold as the operation duration;

[0034] After the end of the third defrosting stage, stop operating the third self-cleaning mode; the third self-cleaning mode includes the third frosting stage and the third defrosting stage.

[0035] A control method for self-cleaning of an air conditioner provided by the present invention, the execution of the fourth self-cleaning mode includes:

[0036] Enter the fourth frosting stage;

[0037] In the fourth frosting stage, the air conditioner performs heating under the first refrigerant cycle circuit, the compressor operates at a fourth target frequency, the indoor unit fan operates at the maximum wind speed, the opening degree of the electronic expansion valve is adjusted to a second target opening degree, and the outdoor unit fan is in a stopped operating state;

[0038] When the operation duration in the fourth frosting stage exceeds a seventh duration threshold, enter the fourth defrosting stage of the fourth self-cleaning mode;

[0039] In the fourth defrosting stage, the outdoor unit fan operates at the maximum wind speed and has an operation duration of an eighth duration threshold;

[0040] After the fourth defrosting stage ends, stop operating the fourth self-cleaning mode and record the start time of the third self-cleaning mode; the fourth self-cleaning mode includes the fourth frosting stage and the fourth defrosting stage.

[0041] According to a control method for self-cleaning of an air conditioner provided by the present invention, after recording the start time of the first self-cleaning mode, it further includes:

[0042] When it is determined that the target duration exceeds a ninth duration threshold, the target heating device is in an operating state, and the air conditioner is in a target mode, control the air conditioner to switch from the target mode to the first self-cleaning mode for operation; the target duration starts from the start time; the target mode includes a refrigeration mode or a heating mode;

[0043] After the first self-cleaning mode operation ends, control the air conditioner to operate the second self-cleaning mode;

[0044] After the second self-cleaning mode operation ends, control the air conditioner to switch back to the target mode.

[0045] According to a control method for self-cleaning of an air conditioner provided by the present invention, it further includes:

[0046] When it is determined that the air conditioner is in a shutdown state and the cumulative duration since the last shutdown exceeds a tenth duration threshold, turn on the air conditioner for operation and turn on the target heating device for operation;

[0047] Control the air conditioner to sequentially operate the first self-cleaning mode and the second self-cleaning mode;

[0048] After the second self-cleaning mode operation ends, control the air conditioner to enter the shutdown state.

[0049] According to a control method for self-cleaning of an air conditioner provided by the present invention, before receiving the first input from the user, it further includes:

[0050] When the air conditioner is turned on, turn on the target heating device to operate;

[0051] Receive a third input from the user, where the third input is used to turn on the cooling mode;

[0052] In response to the third input, control the opening and closing of the ports of the first three-way valve and the second three-way valve to form a fourth refrigerant circulation circuit and execute the cooling mode;

[0053] Wherein, in the fourth refrigerant circulation circuit, the path of the refrigerant circulating flow is successively the compressor, the condenser, the electronic expansion valve, the evaporator, the target heating device, and the compressor.

[0054] According to a control method for self-cleaning of an air conditioner provided by the present invention, before receiving the first input from the user, it further includes:

[0055] When the air conditioner is turned on, turn on the target heating device to operate;

[0056] Receive a fourth input from the user, where the fourth input is used to turn on the heating mode;

[0057] In response to the fourth input, control the opening and closing of the ports of the first three-way valve and the second three-way valve to form the second refrigerant circulation circuit and execute the heating mode.

[0058] According to a control method for self-cleaning of an air conditioner provided by the present invention, the target heating device is a solar heating device, and the solar heating device is used to heat the flowing refrigerant.

[0059] The present invention also provides a control device for self-cleaning of an air conditioner, including:

[0060] A first input module, configured to receive a first input from the user when it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than a target temperature threshold; the first input is used to turn on the first self-cleaning mode, and the target heating device is used to heat the flowing refrigerant;

[0061] A first control module, configured to, in response to the first input, control the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a first refrigerant circulation circuit, execute the first self-cleaning mode, and clean the indoor unit of the air conditioner;

[0062] A second control module, configured to control the opening and closing of ports of a first three-way valve and a second three-way valve in the air conditioner after the operation of the first self-cleaning mode ends, so as to form a second refrigerant circulation circuit and execute a second self-cleaning mode to clean the outdoor unit of the air conditioner;

[0063] Under the first refrigerant circulation circuit, the path of the refrigerant circulating flow is: compressor, condenser, electronic expansion valve, evaporator, the compressor;

[0064] Under the second refrigerant circulation circuit, the path of the refrigerant circulating flow is: the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, the compressor.

[0065] The present invention further provides an air conditioner, including a compressor, a four-way valve, a condenser, a first three-way valve, a second three-way valve, a target heating device, an electronic expansion valve and an evaporator;

[0066] A first port of the first three-way valve is connected to the four-way valve through the condenser, the four-way valve is connected to the compressor, and a third port of the first three-way valve is respectively connected to one end of the electronic expansion valve and a third port of the target heating device; the other end of the electronic expansion valve is connected to one end of the evaporator;

[0067] A first port of the second three-way valve is connected to the compressor through the four-way valve, and a second port of the second three-way valve is connected to a second port of the target heating device;

[0068] A second port of the first three-way valve is connected to a first port of the target heating device; a third port of the second three-way valve is respectively connected to the other end of the evaporator and a fourth port of the target heating device;

[0069] It further includes a controller, the controller includes a memory, a processor and a computer program stored on the memory and executable on the processor, and when the processor executes the program, it realizes the control method for self-cleaning of the air conditioner as described in any one of the above.

[0070] The present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it realizes the control method for self-cleaning of the air conditioner as described in any one of the above.

[0071] The present invention further provides a computer program product, including a computer program, and when the computer program is executed by a processor, it realizes the control method for self-cleaning of the air conditioner as described in any one of the above.

[0072] The control method, device, air conditioner, and storage medium for self-cleaning of an air conditioner provided by the present invention improve the internal pipeline structure of the air conditioner by adding a three-way valve and a heating device. When it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, a first input from the user is received. In response to the first input, the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner are controlled to form a first refrigerant circulation loop, and the path of the refrigerant circulation flow is the compressor, condenser, electronic expansion valve, evaporator, and compressor. Thus, under the first refrigerant circulation loop, a first self-cleaning mode is executed, and the heat stored in the target heating device is not used during the self-cleaning process of the indoor unit. After the first self-cleaning mode operation ends, the first three-way valve and the second three-way valve in the air conditioner are controlled to form a second refrigerant circulation loop, and the path of the refrigerant circulation flow is the compressor, evaporator, electronic expansion valve, target heating device, condenser, and compressor. When the second self-cleaning mode is executed, the heat stored in the target heating device is used for auxiliary heating during the self-cleaning process of the outdoor unit, which can effectively reduce the icing risk in a low-temperature environment, achieve the cleaning of the indoor unit and the outdoor unit, and can also effectively improve the self-cleaning efficiency of the outdoor unit of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0074] Figure 1 is a schematic structural diagram of the air conditioner provided by the present invention;

[0075] Figure 2 is a schematic flowchart of the control method for self-cleaning of the air conditioner provided by the present invention;

[0076] Figure 3 is a schematic structural diagram of the control device for self-cleaning of the air conditioner provided by the present invention;

[0077] Figure 4 is a schematic structural diagram of the controller in the air conditioner provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0078] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts belong to the scope of protection of the present invention.

[0079] The following will describe in conjunction with Figures 1-4 the control method, device, air conditioner, and storage medium for self-cleaning of the air conditioner of the present invention.

[0080] Figure 1 is a schematic structural diagram of the air conditioner provided by the present invention. As Figure 1 shown, the air conditioner includes a compressor 110, a four-way valve 120, a condenser 130, a first three-way valve 140, a second three-way valve 150, a target heating device 160, an electronic expansion valve 170, and an evaporator 180;

[0081] The first port 141 of the first three-way valve 140 is connected to the four-way valve 120 through the condenser 130. The four-way valve 120 is connected to the compressor 110. The third port 143 of the first three-way valve 140 is respectively connected to one end of the electronic expansion valve 170 and the third port 163 of the target heating device 160. The other end of the electronic expansion valve 170 is connected to one end of the evaporator 180;

[0082] The first port 151 of the second three-way valve 150 is connected to the compressor 110 through the four-way valve 120. The second port 152 of the second three-way valve 150 is connected to the second port 162 of the target heating device 160;

[0083] The second port 142 of the first three-way valve 140 is connected to the first port 161 of the target heating device 160. The third port 153 of the second three-way valve 150 is respectively connected to the other end of the evaporator 180 and the fourth port 164 of the target heating device 160.

[0084] In the embodiment of the present invention, when it is detected that the user turns on the refrigeration mode for operation, the first three-way valve connects its first port and third port, and the second three-way valve connects its first port and second port. At this time, the refrigerant circulates successively through the compressor, condenser, electronic expansion valve, evaporator, target heating device, and compressor. By heating the low-temperature and low-pressure refrigerant coming out of the evaporator, the temperature of the refrigerant is increased. The gas-liquid two-phase refrigerant in the saturated state can become gaseous refrigerant after absorbing the heat of the target heating device, preventing the occurrence of liquid refrigerant, effectively preventing the liquid hammer phenomenon of the refrigerant on the compressor, protecting the compressor, and at the same time improving the efficiency of the compressor and reducing the energy consumption of the compressor;

[0085] When it is detected that the user starts the heating mode, the first three-way valve connects its first port and second port, and the second three-way valve connects its first port and third port. At this time, the refrigerant circulates successively through the compressor, evaporator, electronic expansion valve, target heating device, condenser, and compressor. By heating the low-temperature and low-pressure refrigerant flowing out after throttling by the electronic expansion valve, the gas-liquid two-phase refrigerant in the saturated state can become gaseous refrigerant after absorbing the heat of the target heating device, increasing the temperature of the refrigerant. Then, after entering the condenser, the heat exchange efficiency of the condenser can be improved, and at the same time, the efficiency of the compressor can be increased, reducing the energy consumption of the compressor.

[0086] Figure 2 is a schematic flow chart of the control method for self-cleaning of an air conditioner provided by the present invention, as Figure 2 shown, including: step 110, step 120, and step 130.

[0087] Step 110, when it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, receive the first input from the user, where the first input is used to turn on the self-cleaning mode; the target heating device is used to heat the flowing refrigerant;

[0088] Specifically, the target heating device described in the embodiments of the present invention is used to heat the flowing refrigerant, and it can specifically adopt a solar heating device or an electric heating device.

[0089] In the embodiments of the present invention, when the air conditioner is turned on, the target heating device can be turned on synchronously for heating.

[0090] Optionally, in the embodiments of the present invention, the target heating device is a solar heating device, and the solar heating device is used to heat the flowing refrigerant.

[0091] In the embodiments of the present invention, by adopting solar heating technology and making full use of rich solar energy resources to heat the refrigerant in the air conditioner, the purpose of environmental protection and energy conservation and emission reduction can be achieved.

[0092] The target temperature threshold described in the embodiments of the present invention refers to a preset temperature threshold, and its specific value range can be 4°C to 6°C.

[0093] The first input described in the embodiments of the present invention refers to the user operation of turning on the self-cleaning mode when it is determined that the target heating device is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold.

[0094] Among them, the first input can be manifested in at least one of the following ways:

[0095] First, the first input can be manifested as a touch input, including but not limited to operations such as click input, swipe input, and press input.

[0096] In this embodiment, through wireless interconnection, the operation of the air conditioner can be controlled by the user's electronic device. Receiving the first input from the user can be manifested as receiving the first input from the user in the display area of the electronic device display screen, and then automatically sending the first input to the air conditioner. The controller of the air conditioner can receive the first input from the user.

[0097] Second, the first input can be manifested as a physical button input.

[0098] In this embodiment, a physical button for triggering the air conditioner to start the first self-cleaning mode can be provided on the terminal for controlling the air conditioner. Receiving the first input from the user can be manifested as receiving the first input from the user pressing the corresponding physical button on the electronic device, and then automatically sending the first input to the air conditioner. The controller of the air conditioner can receive the first input from the user.

[0099] Third, the first input can be manifested as a voice input.

[0100] In this embodiment, the air conditioner can be pre-set with a voice interaction module to interact with the user in voice. It can receive the user's voice, such as the voice of "start self-cleaning", etc., to implement the first input and send the first input to the air conditioner.

[0101] Of course, in other embodiments, the first input can also be manifested in other forms, which can be specifically determined according to actual needs, and the embodiments of the present invention do not limit this.

[0102] The method of the embodiments of the present invention, when it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, by receiving the first input from the user, it can trigger the air conditioner to start the first self-cleaning mode, realizing the user's autonomous control of the air conditioner cleaning, facilitating the user to control the frequency of the air conditioner self-cleaning according to personal needs, and being beneficial to improving the user experience.

[0103] Step 120, in response to the first input, control the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a first refrigerant circulation loop, and execute the first self-cleaning mode to clean the indoor unit of the air conditioner;

[0104] Specifically, in the embodiments of the present invention, in the first refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the condenser, the electronic expansion valve, the evaporator, and the compressor.

[0105] The first self-cleaning mode described in the embodiments of the present invention refers to the mode of controlling the air conditioner to perform self-cleaning on the indoor unit, specifically referring to the self-cleaning mode executed on the first refrigerant circulation loop.

[0106] The first three-way valve and the second three-way valve described in the embodiments of the present invention are two preset three-way valves. Among them, as Figure 1 shown, the first three-way valve is arranged between the condenser and the electronic expansion valve, and the second three-way valve is arranged between the four-way valve and the evaporator, which are used to control the refrigerant flow circulation loop so as to heat the refrigerant through the target heating device.

[0107] In the embodiments of the present invention, by controlling the opening and closing of the ports of the first three-way valve and the second three-way valve, the first three-way valve connects its first port and the third port, and the second three-way valve connects its first port and the third port. Thus, the path of the refrigerant circulating flow is the compressor, the condenser, the electronic expansion valve, the evaporator, the compressor, forming the first refrigerant circulation loop. It can be understood that the target heating device does not participate in the first refrigerant circulation loop.

[0108] Further, in response to the first input, control the first three-way valve and the second three-way valve in the air conditioner to form the first refrigerant circulation loop, and execute the first self-cleaning mode under the first refrigerant circulation loop, so that when the air conditioner performs self-cleaning operation, the frosting control process and the defrosting control process in the self-cleaning mode can be effectively realized, thereby cleaning the indoor unit of the air conditioner.

[0109] Based on the content of the above embodiments, as an alternative embodiment, executing the first self-cleaning mode includes:

[0110] Enter the first frosting stage;

[0111] In the first frosting stage, the air conditioner performs refrigeration under the first refrigerant circulation loop, the compressor operates at the first target frequency, the indoor unit fan is in the stopped operation state, and the outdoor unit fan is in the running state. The target frequency is determined based on the outdoor ambient temperature;

[0112] When the running duration in the first frosting stage exceeds the first duration threshold, enter the first defrosting stage;

[0113] In the first defrosting stage, the air conditioner switches from the refrigeration mode to the heating mode, the indoor unit fan operates at the maximum wind speed, and the running duration is the second duration threshold;

[0114] After the first defrosting stage ends, stop running the first self-cleaning mode; the first self-cleaning mode includes the first frosting stage and the first defrosting stage.

[0115] Specifically, in an embodiment of the present invention, the first self-cleaning mode includes a first frosting stage and a first defrosting stage. That is to say, the first frosting stage refers to the frosting stage of the first self-cleaning mode, and the first defrosting stage refers to the defrosting stage of the first self-cleaning mode.

[0116] The first target frequency described in the embodiment of the present invention refers to the initial operating frequency of the compressor when the first self-cleaning mode is turned on, which is determined based on the outdoor ambient temperature. Specifically, in the embodiment of the present invention, when the outdoor ambient temperature is greater than or equal to 22°C, the first target frequency may be 85 Hz; when the outdoor ambient temperature is less than 22°C, the first target frequency may be 80 Hz.

[0117] The first duration threshold described in the embodiment of the present invention refers to the threshold of the preset operating duration of the first frosting stage, and its specific value range may be 10 to 15 minutes.

[0118] The second duration threshold described in the embodiment of the present invention refers to the threshold of the preset operating duration of the first defrosting stage, and its specific value range may be 0.5 to 1 minute.

[0119] Further, in the embodiment of the present invention, when the first self-cleaning mode is executed and the first frosting stage is entered: in the first frosting stage, the air conditioner performs refrigeration in the first refrigerant circulation circuit, the compressor operates at the first target frequency, the indoor unit fan is in a stopped state, and the outdoor unit fan is in an operating state, which can effectively accelerate the frosting time of the indoor unit self-cleaning;

[0120] When the operating duration of the first frosting stage exceeds the first duration threshold, the first defrosting stage is entered: in the first defrosting stage, the air conditioner switches from the refrigeration mode to the heating mode, the indoor unit fan operates at the maximum wind speed, and the operating duration is the second duration threshold, which can effectively accelerate the defrosting time of the indoor unit self-cleaning, so as to perform rapid defrosting and efficient dust removal in the first self-cleaning mode.

[0121] Further, in the embodiment of the present invention, after the first defrosting stage ends, the first self-cleaning mode stops running.

[0122] In a specific embodiment of the present invention, in the case of heating in winter, when the outdoor ambient temperature is not greater than the target temperature threshold, the air conditioner is in the heating state. At this time, by controlling the compressor to adjust its frequency to the target frequency value (such as 45 Hz) within a predetermined time (such as 1.5 minutes), the value range of the target frequency value can be from 40 Hz to 50 Hz. By controlling the compressor to operate at a low frequency, it is convenient for the four-way valve to change direction, and the air conditioner is adjusted to the cooling mode, so that the air conditioner is in the cooling state. After starting the air conditioner to enter the first frosting stage of the first self-cleaning mode, if the outdoor ambient temperature is less than 22 °C at this time, the compressor of the air conditioner operates according to the first target frequency (such as 80 Hz) and performs refrigeration under the first refrigerant circulation circuit. At the same time, the indoor fan stops and the outdoor fan rotates normally. After the operation time in the first frosting stage exceeds the first duration threshold (such as 10 minutes), the air conditioner enters the first defrosting stage. To increase the defrosting time in winter, the compressor frequency can be controlled to adjust to the target frequency value, the four-way valve is controlled to change direction, the air conditioner is adjusted to the heating mode, and then the indoor fan is turned on to run at the maximum wind speed for 0.5 minutes for drying. After that, the self-cleaning of the indoor unit ends.

[0123] It should be noted that the refrigeration state described in the embodiments of the present invention refers to the mechanical state in which the air conditioner is in the cooling mode through the four-way valve commutation. For example, when the air conditioner is operating in the cooling mode and shuts down and exits the cooling mode, the air conditioner will still be in the refrigeration state. It can be understood that the heating state refers to the mechanical state in which the air conditioner is in the heating mode through the four-way valve commutation.

[0124] The method of the embodiments of the present invention sets the operating parameters for the frosting stage and the defrosting stage in the self-cleaning mode of the indoor unit, so that the air conditioner can be finely controlled under the first refrigerant circulation circuit, thereby more accurately and effectively controlling the operation of the air conditioner in the self-cleaning mode of the indoor unit, which is beneficial to accelerating the frosting time and defrosting time of the self-cleaning mode of the indoor unit and improving the self-cleaning efficiency of the air conditioner.

[0125] Step 130, after the operation of the first self-cleaning mode ends, control the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a second refrigerant circulation circuit, and execute the second self-cleaning mode to clean the outdoor unit of the air conditioner;

[0126] Under the second refrigerant circulation circuit, the path of the refrigerant circulating flow is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor.

[0127] Specifically, the second self-cleaning mode described in the embodiments of the present invention refers to the mode of controlling the air conditioner to self-clean the outdoor unit under the second refrigerant circulation circuit.

[0128] In the embodiment of the present invention, by controlling the opening and closing of the ports of the first three-way valve and the second three-way valve, the first three-way valve is connected to its first port and second port, and the second three-way valve is connected to its first port and third port. Thus, the path for the refrigerant to circulate is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor, forming a second refrigerant circulation loop. It can be understood that, compared with the first refrigerant circulation loop, the target heating device is added to the second refrigerant circulation loop.

[0129] Further, after the operation of the first self-cleaning mode is completed, by controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a second refrigerant circulation loop, and executing the second self-cleaning mode under the second refrigerant circulation loop, the heat stored in the target heating device is used to assist in heating the heat exchanger during the self-cleaning process of the outdoor unit, so as to reduce the risk of icing, and the frosting control process and defrosting control process in the self-cleaning mode of the outdoor unit can be effectively realized, thereby cleaning the outdoor unit of the air conditioner.

[0130] Based on the content of the above embodiment, as an optional embodiment, executing the second self-cleaning mode includes:

[0131] Enter the second frosting stage;

[0132] In the second frosting stage, the air conditioner performs heating under the second refrigerant circulation loop, the compressor operates at the second target frequency, the indoor unit fan operates at a preset wind speed, the opening of the electronic expansion valve is adjusted to the first target opening, and the outdoor unit fan is in a stopped operating state;

[0133] When the operation duration in the second frosting stage exceeds the third duration threshold, enter the second defrosting stage of the second self-cleaning mode;

[0134] In the second defrosting stage, the outdoor unit fan operates at the maximum wind speed and uses the fourth duration threshold as the operation duration;

[0135] After the second defrosting stage ends, stop operating the second self-cleaning mode and record the start time of the first self-cleaning mode; the second self-cleaning mode includes the second frosting stage and the second defrosting stage.

[0136] Specifically, in the embodiment of the present invention, the second self-cleaning mode includes the second frosting stage and the second defrosting stage. That is to say, the second frosting stage refers to the frosting stage of the second self-cleaning mode, and the second defrosting stage refers to the defrosting stage of the second self-cleaning mode.

[0137] The second target frequency described in the embodiments of the present invention refers to the initial operating frequency of the compressor when the second self-cleaning mode is turned on, and it is also determined based on the outdoor ambient temperature. Specifically, in the embodiments of the present invention, when the outdoor ambient temperature is greater than or equal to 16 °C, the second target frequency can be 80 Hz; when the outdoor ambient temperature is greater than or equal to 5 °C and less than 16 °C, the second target frequency can be 85 Hz; when the outdoor ambient temperature is less than 5 °C, the second target frequency can be 60 Hz.

[0138] The preset wind speed described in the embodiments of the present invention can be the wind speed corresponding to the maximum wind speed or the intermediate wind speed gear.

[0139] The first target opening described in the embodiments of the present invention refers to the opening after increasing the target opening value on the basis of the original opening of the electronic expansion valve. At this time, the original opening of the electronic expansion valve is the opening of the electronic expansion valve when it has not entered the second frosting stage. The specific value range of the target opening value can be 90 steps to 110 steps. It should be noted that the maximum opening of the electronic expansion valve does not exceed 480 steps.

[0140] The third duration threshold described in the embodiments of the present invention refers to the preset threshold of the operating duration in the second frosting stage, and its specific value range can also be 8 to 15 minutes.

[0141] The fourth duration threshold described in the embodiments of the present invention refers to the preset threshold of the operating duration in the second defrosting stage, and it is also the operating duration threshold of the outdoor unit fan in the second defrosting stage. Its specific value range can be 0.5 to 1 minute.

[0142] Further, in the embodiments of the present invention, after stopping the operation of the first self-cleaning mode, the second self-cleaning mode is executed, and the second frosting stage is entered:

[0143] In the second frosting stage, by controlling the first three-way valve and the second three-way valve, a second refrigerant circulation circuit is formed, so that the air conditioner performs heating under the second refrigerant circulation circuit, and a target heating device is added to assist in heating the refrigerant. The compressor operates at the second target frequency, the indoor unit fan operates at the maximum wind speed, the opening of the electronic expansion valve is increased to the first target opening, and the outdoor unit fan is in a stopped operating state, which can effectively increase the frosting speed and accelerate the frosting time of the outdoor unit self-cleaning;

[0144] When the operating duration in the second frosting stage exceeds the third duration threshold, the second defrosting stage is entered: In the second defrosting stage, the outdoor unit fan operates at the maximum wind speed and operates for the fourth duration threshold, which can effectively accelerate the defrosting time of the outdoor unit self-cleaning, so that rapid defrosting is performed in the second self-cleaning mode, and efficient dust removal is performed.

[0145] Further, in the embodiment of the present invention, after the end of the second defrosting stage, the second self-cleaning mode is stopped, and the start time of the first self-cleaning mode is recorded to facilitate regular self-cleaning of the air conditioner.

[0146] In a specific embodiment of the present invention, in the case of heating in winter, after the indoor unit self-cleaning is completed, the second frosting stage of the second self-cleaning mode is entered. By controlling the first three-way valve and the second three-way valve, a second refrigerant circulation circuit can be formed so that the air conditioner performs heating under the second refrigerant circulation circuit to realize the frosting control process of the outdoor unit self-cleaning. Furthermore, the compressor is adjusted to operate at a second target frequency (such as 85 Hz), the indoor unit fan operates at the maximum wind speed, and the outdoor unit fan is in a stopped state. At the same time, in order to accelerate the frosting time, the opening of the electronic expansion valve can be increased by 100 steps, with a maximum of no more than 480 steps. When the operation duration of the second frosting stage exceeds a third duration threshold (such as 15 minutes), the second defrosting stage is entered. In the second defrosting stage, the outdoor unit fan operates at the maximum wind speed for 0.5 minutes, then the air conditioner is controlled to stop and exit the self-cleaning mode, and the first three-way valve is controlled to connect its first port and third port, and the second three-way valve is controlled to connect its first port and third port to restore the state at the time of shutdown. At the same time, the start time of the first self-cleaning mode is recorded.

[0147] In the embodiment of the present invention, by setting the operating parameters of the frosting stage and the defrosting stage in the second self-cleaning mode, the outdoor unit self-cleaning function is realized. At the same time, the air conditioner is set for fine control under the second refrigerant circulation circuit to use the heat stored in the target heating device to assist in heating the heat exchanger during the outdoor unit self-cleaning process, so as to more accurately and effectively control the operation of the air conditioner in the outdoor unit self-cleaning mode, which is beneficial to accelerating the frosting time and defrosting time of the outdoor unit self-cleaning mode, reducing the icing risk in a low-temperature environment, and improving the efficiency of the outdoor unit self-cleaning of the air conditioner.

[0148] The control method for self-cleaning of an air conditioner according to an embodiment of the present invention improves the internal pipeline structure of the air conditioner by adding a three-way valve and a heating device. When it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, a first input from the user is received. In response to the first input, the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner are controlled to form a first refrigerant circulation loop, and the path of the refrigerant circulation flow is the compressor, condenser, electronic expansion valve, evaporator, and compressor. Thus, under the first refrigerant circulation loop, a first self-cleaning mode is executed, and the heat stored in the target heating device is not used during the self-cleaning process of the indoor unit. After the first self-cleaning mode operation ends, the first three-way valve and the second three-way valve in the air conditioner are controlled to form a second refrigerant circulation loop, and the path of the refrigerant circulation flow is the compressor, evaporator, electronic expansion valve, target heating device, condenser, and compressor. When the second self-cleaning mode is executed, the heat stored in the target heating device is used for auxiliary heating during the self-cleaning process of the outdoor unit, which can effectively reduce the icing risk in a low-temperature environment. While realizing the cleaning of the indoor unit and the outdoor unit, it can also effectively improve the self-cleaning efficiency of the outdoor unit of the air conditioner.

[0149] Based on the content of the above embodiment, as an alternative embodiment, the method further includes:

[0150] When it is determined that the target heating device is in an operating state and the outdoor ambient temperature is greater than the target temperature threshold, a second input from the user is received; the second input is used to turn on the third self-cleaning mode;

[0151] In response to the second input, the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner are controlled to form a third refrigerant circulation loop, and the third self-cleaning mode is executed to clean the indoor unit of the air conditioner;

[0152] Under the third refrigerant circulation loop, the path of the refrigerant circulation flow is the compressor, condenser, target heating device, electronic expansion valve, evaporator, target heating device, and compressor;

[0153] After the third self-cleaning mode operation ends, the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner are controlled to form a first refrigerant circulation loop, and the fourth self-cleaning mode is executed to clean the outdoor unit of the air conditioner.

[0154] Specifically, in the embodiment of the present invention, under the third refrigerant circulation loop, the path of the refrigerant circulation flow is the compressor, condenser, target heating device, electronic expansion valve, evaporator, target heating device, and compressor; by controlling the first three-way valve in the air conditioner to connect its first port and second port, and the second three-way valve to connect its first port and second port, the third refrigerant circulation loop is thus formed.

[0155] The third self-cleaning mode described in the embodiments of the present invention refers to the self-cleaning mode executed on the third refrigerant circulation loop.

[0156] The second input described in the embodiments of the present invention refers to the user operation of enabling the third self-cleaning mode under the conditions that the target heating device is determined to be in an operating state and the outdoor ambient temperature is greater than the target temperature threshold.

[0157] In the embodiments of the present invention, the specific implementation manner of the second input may be the same as that of the first input. That is to say, the second input may be manifested as at least one of the three manners of the foregoing first input, which will not be elaborated herein. The embodiments of the present invention do not specifically limit the implementation manner of the second input.

[0158] Further, in the embodiments of the present invention, when it is determined that the target heating device is in an operating state and the outdoor ambient temperature is greater than the target temperature threshold, the second input of the user is received; in response to the second input, the port opening and closing of the first three-way valve and the second three-way valve in the air conditioner are controlled to form a third refrigerant circulation loop, and the frosting control process and the defrosting control process in the third self-cleaning mode are executed on the third refrigerant circulation loop, so that the target heating device heats the flowing refrigerant before the refrigerant flows into the evaporator, and at the same time heats the low-temperature and low-pressure refrigerant flowing out of the evaporator, so that the gas-liquid two-phase refrigerant in the saturated state can increase the flow rate of the gaseous refrigerant after absorbing heat, increase the temperature of the refrigerant, and can effectively improve the frosting speed and efficiency of the evaporator after entering the evaporator. At the same time, it can effectively prevent the liquid slugging phenomenon of the refrigerant to the compressor, improve the efficiency of the compressor, and thus can efficiently clean the indoor unit of the air conditioner;

[0159] Based on the content of the above embodiments, as an alternative embodiment, executing the third self-cleaning mode includes:

[0160] Enter the third frosting stage;

[0161] In the third frosting stage, the air conditioner performs refrigeration under the third refrigerant circulation loop, the compressor operates at the third target frequency, the indoor unit fan is in a stopped state, and the outdoor unit fan is in an operating state;

[0162] When the operation duration in the third frosting stage exceeds the fifth duration threshold, enter the third defrosting stage;

[0163] In the third defrosting stage, the air conditioner switches from the refrigeration mode to the heating mode, the indoor unit fan is in an operating state, and the indoor unit fan operates for a duration of the sixth duration threshold;

[0164] After the third defrosting stage ends, stop operating the third self-cleaning mode; the third self-cleaning mode includes the third frosting stage and the third defrosting stage.

[0165] Specifically, in the embodiments of the present invention, the third self-cleaning mode includes a third frosting stage and a third defrosting stage. That is to say, the third frosting stage refers to the frosting stage of the third self-cleaning mode, and the third defrosting stage refers to the defrosting stage of the third self-cleaning mode.

[0166] The third target frequency described in the embodiments of the present invention refers to the initial operating frequency of the compressor when the third self-cleaning mode is turned on, which is determined based on the outdoor ambient temperature. Specifically, in the embodiments of the present invention, when the outdoor ambient temperature is greater than or equal to 22 °C, the third target frequency can be 85 Hz; when the outdoor ambient temperature is less than 22 °C, the third target frequency can be 80 Hz.

[0167] The fifth duration threshold described in the embodiments of the present invention refers to the preset threshold of the operating duration of the third frosting stage, and its specific value range can be 8 to 15 minutes.

[0168] The sixth duration threshold described in the embodiments of the present invention refers to the preset threshold of the operating duration of the third defrosting stage, and its specific value range can be 0.5 to 1 minute.

[0169] Furthermore, in the embodiments of the present invention, when the third self-cleaning mode is executed, the third frosting stage is entered: in the third frosting stage, the air conditioner performs refrigeration in the third refrigerant circulation circuit, the compressor operates at the third target frequency (such as 80 Hz), the indoor unit fan is in a stopped state, and the outdoor unit fan is in an operating state, which can effectively accelerate the frosting time of the indoor unit self-cleaning;

[0170] When the operating duration of the third frosting stage exceeds the fifth duration threshold, the third defrosting stage is entered: in the third defrosting stage, the air conditioner switches from the refrigeration mode to the heating mode, the indoor unit fan is in an operating state, and the indoor unit fan operates with the sixth duration threshold, which can effectively accelerate the defrosting time of the indoor unit self-cleaning, so as to perform rapid defrosting and efficient dust removal in the third self-cleaning mode.

[0171] Furthermore, in the embodiments of the present invention, after the third defrosting stage ends, the third self-cleaning mode stops operating.

[0172] In a specific embodiment of the present invention, in the case of heating in winter, when the outdoor ambient temperature is higher than the target temperature threshold and the air conditioner is in the heating state, at this time, by controlling the compressor frequency to be adjusted to the target frequency value, it is convenient for the four-way valve to change its direction, and the air conditioner is adjusted to the cooling mode, so that the air conditioner is in the cooling state. After starting the air conditioner to enter the third frosting stage of the third self-cleaning mode, if the outdoor ambient temperature is less than 22°C at this time, the compressor of the air conditioner operates at 80 Hz and performs refrigeration in the third refrigerant circulation circuit. At the same time, the indoor unit fan stops and the outdoor unit fan rotates normally. After the operation time in the third frosting stage exceeds the fifth time threshold, such as 10 minutes later, the air conditioner enters the third defrosting stage. To increase the defrosting time in winter, the compressor frequency can be controlled to be adjusted to the target frequency value, the four-way valve is controlled to change its direction, the air conditioner is adjusted to the heating mode, and then the indoor unit fan is turned on to operate at the maximum wind speed for 0.5 minutes for drying. After that, the self-cleaning of the indoor unit ends.

[0173] In another specific embodiment of the present invention, in the case of cooling in summer, when the outdoor ambient temperature is higher than the target temperature threshold and the air conditioner is in the cooling state, after starting the air conditioner to enter the third frosting stage of the third self-cleaning mode, if the outdoor ambient temperature is greater than or equal to 22°C at this time, the compressor of the air conditioner operates at 85 Hz and performs refrigeration in the third refrigerant circulation circuit. At the same time, the indoor unit fan stops and the outdoor unit fan rotates normally. After the operation time in the third frosting stage exceeds the fifth time threshold, such as 10 minutes later, the air conditioner enters the third defrosting stage. Since the temperature is high in summer, there is no need to switch to the heating mode. At this time, only the indoor unit fan needs to be turned on and operated at the maximum wind speed for 0.5 minutes for drying. After that, the self-cleaning of the indoor unit ends.

[0174] The method of the embodiment of the present invention, for the scenario where the outdoor ambient temperature is higher than the target temperature threshold, by setting the operating parameters for the frosting stage and the defrosting stage in the self-cleaning mode of the indoor unit, enables the air conditioner to perform fine control in the third refrigerant circulation circuit, thereby more accurately and effectively controlling the operation of the air conditioner in the self-cleaning mode of the indoor unit, which is beneficial to accelerating the frosting time and defrosting time of the self-cleaning mode of the indoor unit, improving the applicability of the self-cleaning function, and being beneficial to improving the self-cleaning efficiency of the air conditioner.

[0175] Further, in the embodiment of the present invention, after the operation of the third self-cleaning mode ends, the first three-way valve is controlled to connect its first port and third port, and the second three-way valve is controlled to connect its first port and third port to form a first refrigerant circulation circuit, so as to perform the frosting control process and the defrosting control process in the fourth self-cleaning mode on the first refrigerant circulation circuit, thereby cleaning the outdoor unit of the air conditioner.

[0176] Based on the content of the above embodiments, as an alternative embodiment, the fourth self-cleaning mode is executed, including:

[0177] Enter the fourth frosting stage;

[0178] In the fourth frosting stage, the air conditioner operates in heating mode under the first refrigerant cycle circuit. The compressor operates at the fourth target frequency, the indoor unit fan operates at the maximum wind speed, the opening of the electronic expansion valve is adjusted to the second target opening, and the outdoor unit fan is in a stopped state;

[0179] When the operation duration in the fourth frosting stage exceeds the seventh duration threshold, enter the fourth defrosting stage of the fourth self-cleaning mode;

[0180] In the fourth defrosting stage, the outdoor unit fan operates at the maximum wind speed and has an operation duration of the eighth duration threshold;

[0181] After the fourth defrosting stage ends, stop operating the fourth self-cleaning mode and record the start time of the third self-cleaning mode; The fourth self-cleaning mode includes the fourth frosting stage and the fourth defrosting stage.

[0182] Specifically, in the embodiments of the present invention, the fourth self-cleaning mode includes the fourth frosting stage and the fourth defrosting stage. That is to say, the fourth frosting stage refers to the frosting stage of the fourth self-cleaning mode, and the fourth defrosting stage refers to the defrosting stage of the fourth self-cleaning mode.

[0183] The fourth target frequency described in the embodiments of the present invention refers to the initial operating frequency of the compressor when the fourth self-cleaning mode is turned on, and it is also determined based on the outdoor ambient temperature. Specifically, in the embodiments of the present invention, when the outdoor ambient temperature is greater than or equal to 16°C, the fourth target frequency can be 80 Hz; when the outdoor ambient temperature is greater than or equal to 5°C and less than 16°C, the fourth target frequency can be 85 Hz.

[0184] The second target opening described in the embodiments of the present invention refers to the opening after increasing the target opening value on the basis of the original opening of the electronic expansion valve. At this time, the original opening of the electronic expansion valve is the opening of the electronic expansion valve before entering the fourth frosting stage. The specific value range of the target opening value can be 40 steps to 60 steps.

[0185] The seventh duration threshold described in the embodiments of the present invention refers to the preset threshold of the operation duration in the fourth frosting stage, and its specific value range can also be 10 to 15 minutes.

[0186] The eighth duration threshold described in the embodiments of the present invention refers to the preset threshold of the operation duration in the fourth defrosting stage, and it is also the operation duration threshold of the outdoor unit fan in the fourth defrosting stage. Its specific value range can be 0.5 to 1 minute.

[0187] Further, in the embodiment of the present invention, after stopping the operation of the third self-cleaning mode, the fourth self-cleaning mode is executed, and the fourth frosting stage is entered:

[0188] In the fourth frosting stage, by controlling the first three-way valve and the second three-way valve, a first refrigerant circulation circuit is formed, so that the air conditioner performs heating under the first refrigerant circulation circuit, the compressor operates at a fourth target frequency, the indoor unit fan operates at the maximum wind speed, the opening degree of the electronic expansion valve is adjusted to a second target opening degree, and the outdoor unit fan is in a stopped operation state, which can effectively increase the frosting speed and accelerate the frosting time of the outdoor unit self-cleaning;

[0189] When the operation duration in the fourth frosting stage exceeds the seventh duration threshold, the fourth defrosting stage is entered: In the fourth defrosting stage, the outdoor unit fan operates at the maximum wind speed and operates for the eighth duration threshold, which can effectively accelerate the defrosting time of the outdoor unit self-cleaning, so as to perform rapid defrosting in the fourth self-cleaning mode and perform efficient dust removal.

[0190] Further, in the embodiment of the present invention, after the fourth defrosting stage ends, the fourth self-cleaning mode is stopped, and the start time of the third self-cleaning mode is recorded to facilitate the regular self-cleaning of the air conditioner.

[0191] In a specific embodiment of the present invention, in the case of winter heating, when the outdoor ambient temperature is higher than the target temperature threshold, after the third self-cleaning mode of the indoor unit ends, the air conditioner is in the heating mode and enters the fourth frosting stage of the fourth self-cleaning mode. The first three-way valve and the second three-way valve are controlled to form a first refrigerant circulation circuit for heating to realize the frosting control process of the outdoor unit self-cleaning. Furthermore, the compressor is adjusted to operate at a fourth target frequency (such as 85 Hz), the indoor unit fan operates at the maximum wind speed, the electronic expansion valve is increased by 50 steps to be adjusted to the second target opening degree, and the outdoor unit fan is in a stopped operation state. When the operation duration in the fourth frosting stage exceeds the seventh duration threshold (such as 10 minutes), the fourth defrosting stage is entered. In the fourth defrosting stage, the outdoor unit fan operates at the maximum wind speed, operates for 0.5 minutes to dry, then exits the self-cleaning mode, and controls the first three-way valve to connect its first port and second port, and the second three-way valve to connect its first port and third port to restore the heating state. The air conditioner continues to operate in heating, and at the same time, the start time of the third self-cleaning mode is recorded.

[0192] In another specific embodiment of the present invention, in the case of summer cooling, when the outdoor ambient temperature is higher than the target temperature threshold, after the third self-cleaning mode of the indoor unit ends, the compressor frequency can be controlled to be adjusted to the target frequency value, facilitating the four-way valve to change its direction, adjusting the air conditioner to the heating mode, controlling the first three-way valve and the second three-way valve to form a first refrigerant circulation loop for heating, so as to realize the frosting control process of the outdoor unit self-cleaning. Furthermore, the compressor is adjusted to operate at the fourth target frequency (such as 80 Hz). Due to the high temperature in summer, there is no need to increase the electronic expansion valve. Only the indoor unit fan operates at the maximum wind speed, and the outdoor unit fan is in the stopped state. When the operation duration in the fourth frosting stage exceeds the seventh duration threshold (such as 10 minutes), it enters the fourth defrosting stage. In the fourth defrosting stage, the outdoor unit fan operates at the maximum wind speed for 0.5 minutes for drying, then exits the self-cleaning mode, and controls the first three-way valve to connect its first port and the third port, and the second three-way valve to connect its first port and the second port, restoring the cooling state. The air conditioner continues to operate in the cooling mode, and at the same time records the start time of the third self-cleaning mode.

[0193] In the embodiments of the present invention, for the scenario where the outdoor ambient temperature is higher than the target temperature threshold, by setting the operating parameters for the frosting stage and the defrosting stage in the fourth self-cleaning mode, the self-cleaning function of the outdoor unit is realized. At the same time, the air conditioner is set to perform fine control under the second refrigerant circulation loop, so as to more accurately and effectively control the operation of the air conditioner in the outdoor unit self-cleaning mode, which is beneficial to accelerating the frosting time and defrosting time of the outdoor unit self-cleaning mode and improving the efficiency of the outdoor unit self-cleaning of the air conditioner.

[0194] The method of the embodiments of the present invention, for the scenario where the outdoor ambient temperature is greater than the target temperature threshold, by adding a target heating device to heat the refrigerant, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner, and adjusting the refrigerant circulation loop to execute the third self-cleaning mode and the fourth self-cleaning mode, can efficiently realize the frosting control process and the defrosting control process of the self-cleaning mode, realize cleaning the indoor unit and the outdoor unit of the air conditioner simultaneously, improve the applicability of the self-cleaning mode, and is beneficial to improving the efficiency of the air conditioner for self-cleaning.

[0195] Based on the content of the above embodiments, as an optional embodiment, before receiving the first input from the user, it further includes:

[0196] When the air conditioner is turned on, turn on the target heating device to operate;

[0197] Receive the third input from the user, where the third input is used to turn on the cooling mode;

[0198] In response to the third input, control the opening and closing of the ports of the first three-way valve and the second three-way valve to form a fourth refrigerant circulation loop and execute the cooling mode;

[0199] Among them, in the fourth refrigerant circulation loop, the path of the refrigerant circulating flow is successively the compressor, the condenser, the electronic expansion valve, the evaporator, the target heating device, and the compressor.

[0200] Specifically, the third input described in the embodiments of the present invention refers to the user operation for turning on the cooling mode of the air conditioner.

[0201] In the embodiments of the present invention, the specific implementation manner of the third input may be the same as that of the first input. That is to say, the third input may be manifested as at least one of the three manners of the foregoing first input, which will not be elaborated herein. The embodiments of the present invention do not specifically limit the implementation manner of the third input.

[0202] In the embodiments of the present invention, by controlling the opening and closing of the ports of the first three-way valve and the second three-way valve, the first three-way valve is connected to its first port and third port, and the second three-way valve is connected to its first port and second port. Thus, the path of the refrigerant circulating flow is successively the compressor, the condenser, the electronic expansion valve, the evaporator, the target heating device, and the compressor, forming the fourth refrigerant circulation loop.

[0203] Further, in the embodiments of the present invention, in response to the third input, the opening and closing of the ports of the first three-way valve and the second three-way valve are controlled to form the fourth refrigerant circulation loop, and the cooling mode of the air conditioner is executed under the fourth refrigerant circulation loop.

[0204] The method of the embodiments of the present invention can heat the low-temperature and low-pressure refrigerant coming out of the evaporator when the cooling mode is running by adding a target heating device and a three-way valve, improve the temperature of the refrigerant, so that the gas-liquid two-phase refrigerant in the saturated state can become a gaseous refrigerant after absorbing heat, prevent the occurrence of liquid refrigerant, effectively prevent the liquid hammer phenomenon of the refrigerant on the compressor, protect the compressor, improve the efficiency of the compressor at the same time, reduce the energy consumption of the compressor, and thus can effectively improve the cooling efficiency of the air conditioner.

[0205] Based on the content of the above embodiments, as an optional embodiment, before receiving the first input of the user, it further includes:

[0206] When the air conditioner is turned on, turn on the operation of the target heating device;

[0207] Receive the fourth input of the user, and the fourth input is used to turn on the heating mode;

[0208] In response to the fourth input, control the opening and closing of the ports of the first three-way valve and the second three-way valve to form the second refrigerant circulation loop and execute the heating mode.

[0209] Specifically, the fourth input described in the embodiments of the present invention refers to the user operation for turning on the heating mode of the air conditioner.

[0210] In an embodiment of the present invention, the specific implementation manner of the fourth input may be the same as that of the first input. That is to say, the fourth input may be manifested as at least one of the three manners of the aforementioned first input, which will not be elaborated herein. The embodiments of the present invention do not specifically limit the implementation manner of the fourth input.

[0211] In an embodiment of the present invention, by controlling the opening and closing of the ports of the first three-way valve and the second three-way valve, the first three-way valve is connected to its first port and second port, and the second three-way valve is connected to its first port and third port. Thus, the path of the refrigerant circulating flow is successively the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor, forming a second refrigerant circulation loop.

[0212] Further, in an embodiment of the present invention, in response to the fourth input, the opening and closing of the ports of the first three-way valve and the second three-way valve are controlled to form a second refrigerant circulation loop, and the heating mode of the air conditioner is executed under the second refrigerant circulation loop.

[0213] The method of the embodiment of the present invention can heat the low-temperature and low-pressure refrigerant coming out after throttling by the electronic expansion valve when the heating mode is running by adding a target heating device and a three-way valve, so that the gas-liquid two-phase refrigerant in the saturated state becomes a gaseous refrigerant after absorbing heat, increasing the temperature of the refrigerant. Then, after entering the condenser, the heat exchange efficiency of the condenser can be improved, and at the same time, the efficiency of the compressor can be increased, reducing the energy consumption of the compressor, thereby effectively improving the heating efficiency of the air conditioner.

[0214] Based on the content of the above embodiments, as an optional embodiment, after recording the start time of the first self-cleaning mode, it further includes:

[0215] When it is determined that the target duration exceeds the ninth duration threshold, and the target heating device is in the running state and the air conditioner is in the target mode, control the air conditioner to switch from the target mode to the first self-cleaning mode for operation; the target duration starts from this start time; the target mode includes the cooling mode or the heating mode;

[0216] After the operation of the first self-cleaning mode ends, control the air conditioner to operate the second self-cleaning mode;

[0217] After the operation of the second self-cleaning mode ends, control the air conditioner to switch back to the target mode.

[0218] Specifically, the target duration described in the embodiment of the present invention refers to the cumulative operation duration of the air conditioner starting from the start time of the first self-cleaning mode.

[0219] The ninth duration threshold described in the embodiment of the present invention refers to a preset duration threshold, and its specific value range may be 45 to 60 days.

[0220] The target mode described in the embodiments of the present invention may include a refrigeration mode or a heating mode.

[0221] Further, in the embodiments of the present invention, after recording the start time of the first self-cleaning mode, when it is determined that the target duration exceeds the ninth duration threshold, and the target heating device is in an operating state, and the air conditioner is in the target mode, that is, the cumulative operating duration of the air conditioner has exceeded the fifth duration threshold, at this time, the air conditioner will automatically switch the current target mode to the first self-cleaning mode for operation, execute the first self-cleaning mode, and perform self-cleaning on the indoor unit.

[0222] Further, in the embodiments of the present invention, after the first self-cleaning mode operation ends, control the air conditioner to operate the second self-cleaning mode to perform self-cleaning on the outdoor unit; after the second self-cleaning mode ends, it indicates that both the indoor unit and the outdoor unit have been cleaned. At this time, control the air conditioner to switch back to the previously operating target mode. Thus, the automatic start-up self-cleaning function can be realized.

[0223] In a specific embodiment of the present invention, in the case of heating in winter, when it is determined that the air conditioner is operating in the target mode of the heating mode and the cumulative operating time of the air conditioner exceeds 50 days, control the air conditioner to automatically start the start-up self-cleaning program. After entering the first frosting stage of the first self-cleaning mode, at this time, the air conditioner is in the heating state. By controlling the compressor frequency to be adjusted to the target frequency value and the four-way valve to be commutated, the air conditioner is adjusted to the refrigeration mode, so that the air conditioner is in the refrigeration state; then the compressor of the air conditioner operates at the first target frequency (such as 80 Hz), control the first three-way valve and the second three-way valve to form the first refrigerant circulation loop, and perform refrigeration under the first refrigerant circulation loop. At the same time, the indoor unit fan stops and the outdoor unit fan rotates normally. After the operation time in the first frosting stage exceeds the first duration threshold, such as 10 minutes, the air conditioner enters the first defrosting stage. To increase the defrosting time in winter, the compressor operation frequency can be controlled to be reduced, the four-way valve is commutated, the air conditioner is adjusted to the heating mode, and then the indoor unit fan is turned on to operate at the maximum wind speed for 0.5 minutes. After that, the self-cleaning of the indoor unit ends.

[0224] After the self-cleaning of the indoor unit is completed and the air conditioner is in the heating state, the first three-way valve and the second three-way valve can be controlled to form a second refrigerant circulation loop, so that the air conditioner can perform heating under the second refrigerant circulation loop to realize the frosting control process of the outdoor unit self-cleaning. When entering the second frosting stage of the second self-cleaning mode, adjust the compressor to operate at the second target frequency (such as 85 Hz), the indoor unit fan operates at the maximum wind speed, and the outdoor unit fan is in the stopped state. At the same time, in order to accelerate the frosting time, the opening degree of the electronic expansion valve can be increased by 100 steps to prevent the outdoor condenser from icing. When the operation duration of the second frosting stage exceeds the third duration threshold (such as 10 minutes), enter the second defrosting stage. In the second defrosting stage, the outdoor unit fan operates at the maximum wind speed, operates for 0.5 minutes to dry, and then exits the self-cleaning mode. Control the first three-way valve and the second three-way valve to maintain the state of the air conditioner in the heating mode and continue to operate according to the previously set heating mode of the air conditioner. At the same time, record the start time of the first self-cleaning mode this time.

[0225] The method of the embodiment of the present invention automatically turns on the self-cleaning mode when it is determined that the cumulative operation duration of the air conditioner exceeds the ninth duration threshold by setting the ninth duration threshold, realizes the regular automatic self-cleaning of the air conditioner, enables the air conditioner to continuously maintain a clean state, is beneficial to improving the user experience. After the self-cleaning is completed, it automatically exits the self-cleaning mode and switches to the operation mode previously selected by the user, without affecting the normal use of the user, and has a good user experience.

[0226] Based on the content of the above embodiment, as an optional embodiment, the method further includes:

[0227] When it is determined that the air conditioner is in the shutdown state and the cumulative duration since the last shutdown exceeds the tenth duration threshold, turn on the air conditioner to operate and turn on the target heating device to operate;

[0228] Control the air conditioner to operate the first self-cleaning mode and the second self-cleaning mode in sequence;

[0229] After the operation of the second self-cleaning mode is completed, control the air conditioner to enter the shutdown state.

[0230] Specifically, the tenth duration threshold described in the embodiment of the present invention refers to a preset duration threshold, and its specific value range can be 80 to 100 days.

[0231] Further, in the embodiment of the present invention, when it is determined that the air conditioner is in the shutdown state and the cumulative duration since the last shutdown exceeds the tenth duration threshold, that is, the duration of the air conditioner being in the shutdown state since the last shutdown has exceeded the tenth duration threshold, the air conditioner can be turned on and the target heating device can be turned on; then, the air conditioner is controlled to operate in the first self-cleaning mode and the second self-cleaning mode to fully clean the indoor unit and the outdoor unit, and after the second self-cleaning mode operation ends, that is, after the cleaning of the indoor unit and the outdoor unit is completed, the air conditioner is controlled to resume to the previous state, that is, enter the shutdown state.

[0232] The method of the embodiment of the present invention automatically turns on the self-cleaning mode when it is determined that the cumulative duration since the last shutdown exceeds the tenth duration threshold by setting the tenth duration threshold, realizes the regular automatic self-cleaning of the air conditioner in the shutdown state, keeps the air conditioner in a clean state continuously, provides a clean state for the next use of the air conditioner, ensures the comfort of the user when using the air conditioner, is beneficial to improving the user experience. After the self-cleaning ends, it automatically exits the self-cleaning mode and enters the shutdown state, without affecting the normal use of the user, and the user experience is good.

[0233] It should be noted that in the embodiment of the present invention, four modes of manual shutdown self-cleaning mode, manual startup self-cleaning mode, automatic shutdown self-cleaning mode, and automatic startup self-cleaning mode can be realized. When the air conditioner is in operation, when the user manually presses a button to select the self-cleaning function and then presses the power button to shut down, it enters the manual shutdown self-cleaning mode; when the user manually presses a button to select the self-cleaning function and does not press the power button to shut down, it enters the manual startup self-cleaning mode; when the cumulative standby time of the air conditioner exceeds the tenth duration threshold, the air conditioner enters the automatic shutdown self-cleaning process mode; when the cumulative operation time of the air conditioner exceeds the ninth duration threshold, the air conditioner enters the automatic startup self-cleaning process mode;

[0234] It should also be noted that in the self-cleaning mode, the above-mentioned first self-cleaning mode and second self-cleaning mode can be executed to clean the indoor unit and the outdoor unit.

[0235] After each self-cleaning operation, record the start time of this time, and set the next automatic self-cleaning time according to this time. The time interval between the two times is not less than 50 days. The manual time is not restricted and can be turned on at any time. The determination of the outdoor ambient temperature is only made once when the self-cleaning is turned on and is not determined afterwards.

[0236] Next, the control device for air conditioner self-cleaning provided by the present invention will be described. The control device for air conditioner self-cleaning described below can be mutually referred to the control method for air conditioner self-cleaning described above.

[0237] Figure 3 is a schematic structural diagram of a control device for self-cleaning of an air conditioner provided by the present invention. As Figure 3 shown, it includes:

[0238] A first input module 310, configured to receive a first input from a user when it is determined that a target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than a target temperature threshold; the first input is used to turn on a first self-cleaning mode, and the target heating device is used to heat the flowing refrigerant;

[0239] A first control module 320, configured to respond to the first input, control the opening and closing of ports of a first three-way valve and a second three-way valve in the air conditioner to form a first refrigerant circulation loop, and execute the first self-cleaning mode to clean the indoor unit of the air conditioner;

[0240] A second control module 330, configured to control the opening and closing of ports of the first three-way valve and the second three-way valve in the air conditioner to form a second refrigerant circulation loop after the first self-cleaning mode ends, and execute a second self-cleaning mode to clean the outdoor unit of the air conditioner;

[0241] Under the first refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the condenser, the electronic expansion valve, the evaporator, and the compressor;

[0242] Under the second refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor.

[0243] The control device for self-cleaning of an air conditioner described in this embodiment can be used to execute the above-mentioned embodiment of the control method for self-cleaning of an air conditioner. The principle and technical effects are similar and will not be elaborated here.

[0244] The control device for self-cleaning of an air conditioner according to an embodiment of the present invention improves the internal pipeline structure of the air conditioner by adding a three-way valve and a heating device. When it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, a first input from the user is received. In response to the first input, the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner are controlled to form a first refrigerant circulation loop, and the path of the refrigerant circulation flow is the compressor, the condenser, the electronic expansion valve, the evaporator, and the compressor. Thus, under the first refrigerant circulation loop, a first self-cleaning mode is executed, and the heat stored in the target heating device is not used during the self-cleaning process of the indoor unit. After the first self-cleaning mode operation ends, the first three-way valve and the second three-way valve in the air conditioner are controlled to form a second refrigerant circulation loop, and the path of the refrigerant circulation flow is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor. When the second self-cleaning mode is executed, the heat stored in the target heating device is used for auxiliary heating during the self-cleaning process of the outdoor unit, which can effectively reduce the icing risk in a low-temperature environment, realize the cleaning of the indoor unit and the outdoor unit, and can also effectively improve the self-cleaning efficiency of the outdoor unit of the air conditioner.

[0245] Figure 4 is a schematic structural diagram of a controller in an air conditioner provided by the present invention, as Figure 4As shown in the figure, the electronic device may include: a processor 410, a communications interface 420, a memory 430, and a communication bus 440. Among them, the processor 410, the communications interface 420, and the memory 430 complete communication with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the control method for self-cleaning of the air conditioner provided by the above-mentioned various methods. The method includes: when it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, receiving a first input from the user; the first input is used to turn on the first self-cleaning mode, and the target heating device is used to heat the flowing refrigerant; in response to the first input, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a first refrigerant circulation loop, and executing the first self-cleaning mode to clean the indoor unit of the air conditioner; after the first self-cleaning mode operation ends, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a second refrigerant circulation loop, and executing a second self-cleaning mode to clean the outdoor unit of the air conditioner; in the first refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the condenser, the electronic expansion valve, the evaporator, and the compressor; in the second refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor.

[0246] In addition, when the logic instructions in the above-mentioned memory 430 are implemented in the form of a software functional unit and sold or used as an independent product, they may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc that can store program codes.

[0247] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method for self-cleaning of an air conditioner provided by the above-mentioned various methods. The method includes: when it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, receiving a first input from the user; the first input is used to turn on the first self-cleaning mode, and the target heating device is used to heat the flowing refrigerant; in response to the first input, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a first refrigerant circulation loop, and executing the first self-cleaning mode to clean the indoor unit of the air conditioner; after the first self-cleaning mode runs to completion, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a second refrigerant circulation loop, and executing a second self-cleaning mode to clean the outdoor unit of the air conditioner; in the first refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the condenser, the electronic expansion valve, the evaporator, and the compressor; in the second refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor.

[0248] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it realizes the execution of the control method for self-cleaning of an air conditioner provided by the above-mentioned various methods. The method includes: when it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, receiving a first input from the user; the first input is used to turn on the first self-cleaning mode, and the target heating device is used to heat the flowing refrigerant; in response to the first input, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a first refrigerant circulation loop, and executing the first self-cleaning mode to clean the indoor unit of the air conditioner; after the first self-cleaning mode runs to completion, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a second refrigerant circulation loop, and executing a second self-cleaning mode to clean the outdoor unit of the air conditioner; in the first refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the condenser, the electronic expansion valve, the evaporator, and the compressor; in the second refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor.

[0249] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative work.

[0250] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0251] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for self-cleaning of an air conditioner, characterized in that, Including: When it is determined that the target heating device in the air conditioner is in an operating state and the outdoor ambient temperature is not greater than the target temperature threshold, receiving a first input from the user; The first input is used to turn on the self-cleaning mode. The target heating device is used to heat the flowing refrigerant. The target temperature threshold refers to a preset temperature threshold, and its specific value range is 4°C to 6°C; In response to the first input, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a first refrigerant circulation loop, and executing a first self-cleaning mode to clean the indoor unit of the air conditioner; After the first self-cleaning mode operation ends, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a second refrigerant circulation loop, and executing a second self-cleaning mode to clean the outdoor unit of the air conditioner; In the first refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the condenser, the electronic expansion valve, the evaporator, and the compressor; In the second refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor; When it is determined that the target heating device is in an operating state and the outdoor ambient temperature is greater than the target temperature threshold, receiving a second input from the user; the second input is used to turn on the third self-cleaning mode; In response to the second input, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a third refrigerant circulation loop, and executing the third self-cleaning mode to clean the indoor unit of the air conditioner; In the third refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the condenser, the target heating device, the electronic expansion valve, the evaporator, the target heating device, and the compressor; After the third self-cleaning mode operation ends, controlling the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form the first refrigerant circulation loop, and executing a fourth self-cleaning mode to clean the outdoor unit of the air conditioner; Executing the third self-cleaning mode includes: Entering the third frosting stage; In the third frosting stage, the air conditioner performs refrigeration in the third refrigerant circulation loop. The compressor operates at a third target frequency, the indoor unit fan is in a stopped state, and the outdoor unit fan is in an operating state. When the outdoor ambient temperature is greater than or equal to 22°C, the third target frequency is 85Hz; when the outdoor ambient temperature is less than 22°C, the third target frequency is 80Hz; When the operation duration in the third frosting stage exceeds the fifth duration threshold, entering the third defrosting stage; In the third defrosting stage, the air conditioner switches from the refrigeration mode to the heating mode. The indoor unit fan is in an operating state, and the indoor unit fan operates for a sixth duration threshold; After the third defrosting stage ends, stopping the operation of the third self-cleaning mode; the third self-cleaning mode includes the third frosting stage and the third defrosting stage.

2. The control method for self-cleaning of an air conditioner according to claim 1, wherein Executing the first self-cleaning mode includes: Entering the first frosting stage; In the first frosting stage, the air conditioner performs refrigeration under the first refrigerant circulation circuit, the compressor operates at a first target frequency, the indoor unit fan is in a stopped state, and the outdoor unit fan is in an operating state. The target frequency is determined based on the outdoor ambient temperature; When the operating duration in the first frosting stage exceeds a first duration threshold, enter the first defrosting stage; In the first defrosting stage, the air conditioner switches from the refrigeration mode to the heating mode, the indoor unit fan operates at the maximum wind speed, and the operating duration is the second duration threshold; After the first defrosting stage ends, stop operating the first self-cleaning mode; the first self-cleaning mode includes the first frosting stage and the first defrosting stage.

3. The control method for self-cleaning of an air conditioner according to claim 1, characterized in that, Executing the second self-cleaning mode includes: Entering the second frosting stage; In the second frosting stage, the air conditioner performs heating under the second refrigerant circulation circuit, the compressor operates at a second target frequency, the indoor unit fan operates at a preset wind speed, the opening degree of the electronic expansion valve is adjusted to a first target opening degree, and the outdoor unit fan is in a stopped state; When the operating duration in the second frosting stage exceeds a third duration threshold, enter the second defrosting stage of the second self-cleaning mode; In the second defrosting stage, the outdoor unit fan operates at the maximum wind speed, and the operating duration is the fourth duration threshold; After the second defrosting stage ends, stop operating the second self-cleaning mode and record the start time of the first self-cleaning mode; the second self-cleaning mode includes the second frosting stage and the second defrosting stage.

4. The control method for self-cleaning of an air conditioner according to claim 1, wherein, Executing the fourth self-cleaning mode includes: Entering the fourth frosting stage; In the fourth frosting stage, the air conditioner performs heating under the first refrigerant circulation circuit, the compressor operates at a fourth target frequency, the indoor unit fan operates at the maximum wind speed, the opening degree of the electronic expansion valve is adjusted to a second target opening degree, and the outdoor unit fan is in a stopped state; When the operating duration in the fourth frosting stage exceeds a seventh duration threshold, enter the fourth defrosting stage of the fourth self-cleaning mode; In the fourth defrosting stage, the outdoor unit fan operates at the maximum wind speed, and the operating duration is the eighth duration threshold; After the fourth defrosting stage ends, stop operating the fourth self-cleaning mode and record the start time of the third self-cleaning mode; the fourth self-cleaning mode includes the fourth frosting stage and the fourth defrosting stage.

5. The control method for self-cleaning of an air conditioner according to claim 3, wherein, After recording the start time of the first self-cleaning mode, it further includes: When it is determined that the target duration exceeds a ninth duration threshold, the target heating device is in an operating state, and the air conditioner is in the target mode, control the air conditioner to switch from the target mode to the first self-cleaning mode for operation; the target duration starts from the start time; the target mode includes the refrigeration mode or the heating mode; After the operation of the first self-cleaning mode ends, control the air conditioner to operate the second self-cleaning mode; After the operation of the second self-cleaning mode ends, control the air conditioner to switch back to the target mode.

6. The control method for self-cleaning of an air conditioner according to claim 3, wherein, It further includes: When it is determined that the air conditioner is in the shutdown state and the cumulative duration since the last shutdown exceeds the tenth duration threshold, turn on the air conditioner to operate and turn on the target heating device to operate; Control the air conditioner to sequentially operate the first self-cleaning mode and the second self-cleaning mode; After the operation of the second self-cleaning mode ends, control the air conditioner to enter the shutdown state.

7. The control method for self-cleaning of an air conditioner according to claim 5, characterized in that, Before receiving the first input from the user, it further includes: When the air conditioner is turned on, turn on the target heating device to operate; Receive the third input from the user, where the third input is used to turn on the cooling mode; In response to the third input, control the opening and closing of the ports of the first three-way valve and the second three-way valve to form a fourth refrigerant circulation circuit and execute the cooling mode; Wherein, in the fourth refrigerant circulation circuit, the path of the refrigerant circulating flow is sequentially the compressor, the condenser, the electronic expansion valve, the evaporator, the target heating device, and the compressor.

8. The control method for self-cleaning of an air conditioner according to claim 5, characterized in that, Before receiving the first input from the user, it further includes: When the air conditioner is turned on, turn on the target heating device to operate; Receive the fourth input from the user, where the fourth input is used to turn on the heating mode; In response to the fourth input, control the opening and closing of the ports of the first three-way valve and the second three-way valve to form the second refrigerant circulation circuit and execute the heating mode.

9. The control method for self-cleaning of an air conditioner according to any one of claims 1-8, characterized in that The target heating device is a solar heating device, and the solar heating device is used to heat the refrigerant flowing through.

10. A control device for self-cleaning of an air conditioner, characterized in that, It includes: A first input module, which is used to receive the first input from the user when it is determined that the target heating device in the air conditioner is in the operating state and the outdoor ambient temperature is not greater than the target temperature threshold; the first input is used to turn on the first self-cleaning mode, the target heating device is used to heat the inflowing refrigerant, and the target temperature threshold refers to a preset temperature threshold, and its specific value range is 4°C to 6°C; A first control module, which is used to control the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner in response to the first input to form a first refrigerant circulation circuit and execute the first self-cleaning mode to clean the indoor unit of the air conditioner; A second control module, which is used to control the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner after the operation of the first self-cleaning mode ends to form a second refrigerant circulation circuit and execute the second self-cleaning mode to clean the outdoor unit of the air conditioner; In the first refrigerant circulation circuit, the path of the refrigerant circulating flow is the compressor, the condenser, the electronic expansion valve, the evaporator, and the compressor; In the second refrigerant circulation circuit, the path of the refrigerant circulating flow is the compressor, the evaporator, the electronic expansion valve, the target heating device, the condenser, and the compressor; When it is determined that the target heating device is in an operating state and the outdoor ambient temperature is greater than the target temperature threshold, receive a second input from the user; the second input is used to turn on the third self-cleaning mode. In response to the second input, control the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form a third refrigerant circulation loop, and execute the third self-cleaning mode to clean the indoor unit of the air conditioner. Under the third refrigerant circulation loop, the path of the refrigerant circulating flow is the compressor, the condenser, the target heating device, the electronic expansion valve, the evaporator, the target heating device, and the compressor. After the third self-cleaning mode operation ends, control the opening and closing of the ports of the first three-way valve and the second three-way valve in the air conditioner to form the first refrigerant circulation loop, and execute the fourth self-cleaning mode to clean the outdoor unit of the air conditioner. Executing the third self-cleaning mode includes: Entering the third frosting stage. In the third frosting stage, the air conditioner refrigerates under the third refrigerant circulation loop, the compressor operates at a third target frequency, the indoor unit fan is in a stopped state, and the outdoor unit fan is in an operating state. When the outdoor ambient temperature is greater than or equal to 22°C, the third target frequency is 85 Hz; when the outdoor ambient temperature is less than 22°C, the third target frequency is 80 Hz. When the operation duration in the third frosting stage exceeds the fifth duration threshold, enter the third defrosting stage. In the third defrosting stage, the air conditioner switches from the refrigeration mode to the heating mode, the indoor unit fan is in an operating state, and the indoor unit fan operates for a sixth duration threshold. After the third defrosting stage ends, stop operating the third self-cleaning mode; the third self-cleaning mode includes the third frosting stage and the third defrosting stage.

11. An air conditioner, characterized in that, Including a compressor, a four-way valve, a condenser, a first three-way valve, a second three-way valve, a target heating device, an electronic expansion valve, and an evaporator. The first port of the first three-way valve is connected to the four-way valve through the condenser, the four-way valve is connected to the compressor, and the third port of the first three-way valve is respectively connected to one end of the electronic expansion valve and the third port of the target heating device; the other end of the electronic expansion valve is connected to one end of the evaporator. The first port of the second three-way valve is connected to the compressor through the four-way valve, and the second port of the second three-way valve is connected to the second port of the target heating device. The second port of the first three-way valve is connected to the first port of the target heating device; the third port of the second three-way valve is respectively connected to the other end of the evaporator and the fourth port of the target heating device. It further includes a controller, the controller includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the control method for air conditioner self-cleaning as described in any one of claims 1 to 9.

12. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the control method for self-cleaning of an air conditioner as described in any one of claims 1 to 9.

13. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the control method for self-cleaning of an air conditioner as described in any one of claims 1 to 9.

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