A control method and device of an air conditioner, the air conditioner, a storage medium and a program product

Abstract

The application discloses a kind of air conditioner control method, device, air conditioner, storage medium and computer program product, outdoor heat exchanger includes parallel first flow path and second flow path;Second solenoid valve is arranged on the branch of first flow path;First solenoid valve one end is connected to between second solenoid valve and first flow path, the other end is connected to the exhaust line of compressor;Two sides of second flow path are respectively provided with third solenoid valve and fourth solenoid valve;The method comprises: after starting heating mode, first solenoid valve is closed, second solenoid valve is opened, and the opening and closing of third solenoid valve and fourth solenoid valve are controlled according to outdoor temperature and the pipe temperature of second flow path;Switch to defrosting mode, open first solenoid valve, third solenoid valve, fourth solenoid valve, close second solenoid valve, and the frequency of compressor and the opening of throttling component are controlled according to the pipe temperature of second flow path.The scheme, through heating does not stop defrosting, for indoor continuous heating, avoid indoor temperature to reduce when defrosting, improve use experience.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and particularly relates to a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, in particular to a control method and device of air conditioner defrosting without shutdown, the air conditioner, a storage medium and a computer program product. BACKGROUND

[0002] When the air conditioner defrosts in the heating mode, the indoor fan is usually controlled to stop running, the four-way valve is reversed, the air conditioner is switched to the refrigeration mode to defrost, at this time, the indoor cannot obtain heat supply, the indoor temperature continues to decrease, and the comfort of the indoor is affected.

[0003] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The present application aims to provide a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, to solve the problem that the indoor cannot obtain heat supply, the indoor temperature continues to decrease, and the comfort of the indoor is affected when the air conditioner defrosts in the heating mode in the related solutions, to achieve the air conditioner heating defrosting without shutdown, to continuously supply heat to the indoor, to avoid the indoor temperature decreasing when defrosting, to ensure the better comfort of the indoor, and to switch the refrigerant flow path in the outdoor heat exchanger when defrosting, to ensure that the defrosting does not affect the heating capacity of the air conditioner, and to improve the use experience.

[0005] The application provides a control method of an air conditioner, the air conditioner comprising an outdoor heat exchanger, a compressor, a throttling component, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve; a first end of the outdoor heat exchanger is connected to the compressor, and a second end of the outdoor heat exchanger is connected to the throttling component; the outdoor heat exchanger comprises a first flow path and a second flow path arranged in parallel; on a branch where the first flow path is located, the second electromagnetic valve is arranged between the first flow path and the first end of the outdoor heat exchanger; one end of the first electromagnetic valve is connected to a pipeline between the second electromagnetic valve and the first flow path, and the other end of the first electromagnetic valve is connected to an exhaust pipeline of the compressor; on a branch where the second flow path is located, the third electromagnetic valve and the fourth electromagnetic valve are arranged at two ends of the second flow path, respectively; the method comprises the following steps: after the air conditioner starts a heating mode, the first electromagnetic valve is in a closed state, and the second electromagnetic valve is in an open state; an outdoor temperature, a pipe temperature of the first flow path and a pipe temperature of the second flow path are obtained; the opening and closing of the third electromagnetic valve and the fourth electromagnetic valve are controlled according to the outdoor temperature and the pipe temperature of the second flow path; whether to switch to a defrosting mode is determined according to the pipe temperature of the first flow path; if it is determined to switch to the defrosting mode, the first electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are opened, and the second electromagnetic valve is closed; meanwhile, the frequency of the compressor and the opening degree of the throttling component are controlled according to the pipe temperature of the second flow path.

[0006] In some embodiments, controlling the opening and closing of the third electromagnetic valve and the fourth electromagnetic valve according to the outdoor temperature and the pipe temperature of the second flow path comprises: judging the size relationship between the outdoor temperature and a first preset temperature; if the outdoor temperature is less than or equal to the first preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are both controlled to be closed; if the outdoor temperature is greater than the first preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are both controlled to be opened, and then the third electromagnetic valve and the fourth electromagnetic valve are controlled to be closed according to the pipe temperature of the second flow path.

[0007] In some embodiments, controlling the third electromagnetic valve and the fourth electromagnetic valve to be closed according to the pipe temperature of the second flow path comprises: judging the size relationship between the pipe temperature of the second flow path and a second preset temperature; if the pipe temperature of the second flow path is less than or equal to the second preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are both controlled to be closed; if the pipe temperature of the second flow path is greater than the second preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are kept to be opened.

[0008] In some embodiments, determining whether to switch to the defrosting mode according to the pipe temperature of the first flow path comprises: judging a size relationship between the pipe temperature of the first flow path and a preset defrosting temperature; if the pipe temperature of the first flow path is less than or equal to the preset defrosting temperature, determining to switch to the defrosting mode; if the pipe temperature of the first flow path is greater than the preset defrosting temperature, not switching to the defrosting mode.

[0009] In some embodiments, controlling the frequency of the compressor and the opening of the throttling component according to the pipe temperature of the second flow path comprises: judging a size relationship between the pipe temperature of the second flow path and a third preset temperature; if the pipe temperature of the second flow path is less than or equal to the third preset temperature, reducing the frequency of the compressor and the opening of the throttling component; if the pipe temperature of the second flow path is greater than the third preset temperature, keeping the frequency of the compressor and the opening of the throttling component unchanged.

[0010] In some embodiments, the air conditioner further comprises an electric auxiliary heating component; the electric auxiliary heating component is used to adjust the outlet air temperature of the air conditioner; the method further comprises: obtaining the outlet air temperature of the air conditioner during the process that the air conditioner operates in the heating mode or the defrosting mode; judging a size relationship between the outlet air temperature and a preset outlet air temperature; if the outlet air temperature is less than the preset outlet air temperature, turning on the electric auxiliary heating component; if the outlet air temperature is greater than or equal to the preset outlet air temperature, keeping the state of the electric auxiliary heating component unchanged.

[0011] According to the method, the application provides a control device for an air conditioner. The air conditioner comprises an outdoor heat exchanger, a compressor, a throttling component, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve. The first end of the outdoor heat exchanger is connected to the compressor, and the second end of the outdoor heat exchanger is connected to the throttling component. The outdoor heat exchanger comprises a first flow path and a second flow path arranged in parallel. The second electromagnetic valve is arranged between the first flow path and the first end of the outdoor heat exchanger in a branch in which the first flow path is located. One end of the first electromagnetic valve is connected to a pipeline between the second electromagnetic valve and the first flow path, and the other end of the first electromagnetic valve is connected to an exhaust pipeline of the compressor. The third electromagnetic valve and the fourth electromagnetic valve are arranged at two ends of the second flow path in a branch in which the second flow path is located. The device comprises an acquisition unit configured to acquire an outdoor temperature, a pipeline temperature of the first flow path and a pipeline temperature of the second flow path when the air conditioner is started in a heating mode, the first electromagnetic valve is in a closed state and the second electromagnetic valve is in an open state. A control unit is configured to control the opening and closing of the third electromagnetic valve and the fourth electromagnetic valve according to the outdoor temperature and the pipeline temperature of the second flow path. The control unit is further configured to determine whether to switch to a defrosting mode according to the pipeline temperature of the first flow path. If it is determined to switch to the defrosting mode, the control unit is further configured to open the first electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve, close the second electromagnetic valve, and control the frequency of the compressor and the opening degree of the throttling component according to the pipeline temperature of the second flow path.

[0012] In some embodiments, the control unit controls the opening and closing of the third electromagnetic valve and the fourth electromagnetic valve according to the outdoor temperature and the pipeline temperature of the second flow path, including: determining the size relationship between the outdoor temperature and a first preset temperature; if the outdoor temperature is less than or equal to the first preset temperature, controlling the third electromagnetic valve and the fourth electromagnetic valve to be closed; if the outdoor temperature is greater than the first preset temperature, controlling the third electromagnetic valve and the fourth electromagnetic valve to be opened, and then controlling the third electromagnetic valve and the fourth electromagnetic valve to be closed according to the pipeline temperature of the second flow path.

[0013] In some embodiments, the control unit controls the third electromagnetic valve and the fourth electromagnetic valve to be closed according to the pipeline temperature of the second flow path, including: determining the size relationship between the pipeline temperature of the second flow path and a second preset temperature; if the pipeline temperature of the second flow path is less than or equal to the second preset temperature, controlling the third electromagnetic valve and the fourth electromagnetic valve to be closed; if the pipeline temperature of the second flow path is greater than the second preset temperature, keeping the third electromagnetic valve and the fourth electromagnetic valve to be opened.

[0014] In some embodiments, the control unit determines whether to switch to the defrosting mode according to the pipe temperature of the first flow path, including: judging the size relationship between the pipe temperature of the first flow path and a preset defrosting temperature; if the pipe temperature of the first flow path is less than or equal to the preset defrosting temperature, it is determined to switch to the defrosting mode; if the pipe temperature of the first flow path is greater than the preset defrosting temperature, it is not switched to the defrosting mode.

[0015] In some embodiments, the control unit controls the frequency of the compressor and the opening degree of the throttling component according to the pipe temperature of the second flow path, including: judging the size relationship between the pipe temperature of the second flow path and a third preset temperature; if the pipe temperature of the second flow path is less than or equal to the third preset temperature, the frequency of the compressor and the opening degree of the throttling component are reduced; if the pipe temperature of the second flow path is greater than the third preset temperature, the frequency of the compressor and the opening degree of the throttling component remain unchanged.

[0016] In some embodiments, the air conditioner further comprises an electric auxiliary heating component; the electric auxiliary heating component is used to adjust the outlet air temperature of the air conditioner; the control unit is further configured to acquire the outlet air temperature of the air conditioner during the air conditioner is running in the heating mode or the defrosting mode; judge the size relationship between the outlet air temperature and a preset outlet air temperature; if the outlet air temperature is less than the preset outlet air temperature, the electric auxiliary heating component is turned on; if the outlet air temperature is greater than or equal to the preset outlet air temperature, the state of the electric auxiliary heating component remains unchanged.

[0017] In order to match the above-mentioned device, the application further provides an air conditioner, which comprises the control device of the air conditioner.

[0018] In order to match the above-mentioned method, the application further provides a storage medium, which comprises a stored program, wherein when the program runs, the device where the storage medium is located executes the control method of the air conditioner.

[0019] In order to match the above-mentioned method, the application further provides a computer program product, which comprises a computer program, and when the computer program product is processed and executed, the steps of the control method of the air conditioner are realized.

[0020] The scheme of the application divides the outdoor heat exchanger into the first flow path and the second flow path, controls the first flow path defrosting and the second flow path participating in the heating cycle by using the electromagnetic valve, makes the first flow path participate in the refrigerant circulation in the heating mode, makes the second flow path participate in the refrigerant circulation in the defrosting mode, makes the air conditioner defrosting without stopping heating, continuously supplies heat indoors during the defrosting process, avoids the indoor temperature reducing during the defrosting, and ensures better indoor comfort. And the refrigerant flow path in the outdoor heat exchanger is switched during the defrosting, which ensures that the defrosting does not affect the heating capacity of the air conditioner, and improves the use experience.

[0021] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application.

[0022] The technical solutions of the present application will be further described in detail below with the help of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Flowchart of an embodiment of the control method of the air conditioner of the present application;

[0024] Figure 2 Structure diagram of an embodiment of the control device of the air conditioner of the present application;

[0025] Figure 3 Structure diagram of the air conditioner of the present application.

[0026] In combination with the accompanying drawings, the reference signs in the embodiments of the present application are as follows:

[0027] 1-compressor; 2-four-way valve; 3-indoor heat exchanger; 4-throttling component; 5-outdoor heat exchanger; 51-first flow path; 52-second flow path; 6-liquid accumulator; 7-one-way valve; 8-first electromagnetic valve; 9-second electromagnetic valve; 10-third electromagnetic valve; 11-fourth electromagnetic valve; 12-fifth electromagnetic valve; 102-acquisition unit; 104-control unit. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0029] When the air conditioner is defrosting in the heating mode through the four-way valve reversing, not only the air conditioner cannot provide heat for the indoor during the defrosting, but also a large reversing noise will be generated when the four-way valve reverses, further reducing the use experience of the air conditioner. Some solutions pass high-temperature refrigerant into the inlet end of the outdoor heat exchanger, so that the high-temperature refrigerant and the low-temperature refrigerant are mixed and then flow into the outdoor heat exchanger, thereby improving the refrigerant flowing into the outdoor heat exchanger for non-stop defrosting. This way will affect the heat exchange efficiency of the outdoor refrigerant, reduce the heating capacity of the air conditioner, and affect the comfort.

[0030] Therefore, the application provides a control method of an air conditioner, in which a four-way valve is not reversed during defrosting, the air conditioner is always used for indoor heating, and complete refrigerant heat exchange is ensured on the outdoor side through switching of two flow paths of an outdoor heat exchanger, so that the heating capacity of the air conditioner is not reduced and the indoor comfort during defrosting is improved.

[0031] According to an embodiment of the application, a control method of an air conditioner is provided, the air conditioner comprising an outdoor heat exchanger, a compressor, a throttling component, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, and a fourth electromagnetic valve. A first end of the outdoor heat exchanger is connected to the compressor through a four-way valve, and a second end of the outdoor heat exchanger is connected to the throttling component. The outdoor heat exchanger comprises a first flow path and a second flow path arranged in parallel. On a branch of the first flow path, the first flow path is provided with the second electromagnetic valve between the first end of the outdoor heat exchanger and the first flow path; one end of the first electromagnetic valve is connected to a pipeline between the second electromagnetic valve and the first flow path, and the other end is connected to an exhaust pipeline of the compressor. On a branch of the second flow path, both ends of the second flow path are respectively provided with the third electromagnetic valve and the fourth electromagnetic valve.

[0032] The structure of the air conditioner is shown in Figure 3 The air conditioner comprises a compressor 1, a four-way valve 2, an indoor heat exchanger 3, a throttling component 4, and an outdoor heat exchanger 5. The inlet of the compressor 1 is connected to the outlet of a liquid storage tank 6, and the inlet of the liquid storage tank 6 and the exhaust port of the compressor 1 are respectively connected to two valve ports of the four-way valve 2. The other two valve ports of the four-way valve 2 are respectively connected to the indoor heat exchanger 3 and the outdoor heat exchanger 5. The indoor heat exchanger 3 and the outdoor heat exchanger 5 are connected through the throttling component 4.

[0033] The outdoor heat exchanger 5 comprises a first flow path 51 and a second flow path 52 arranged in parallel. The first flow path 51 is a main flow path participating in refrigerant heat exchange in a heating mode, and the second flow path 52 is an auxiliary flow path participating in refrigerant heat exchange in the heating mode. There is always refrigerant flowing through the main flow path, and there is refrigerant flowing through the auxiliary flow path only in some cases. The number of U tubes of the first flow path 51 is greater than or equal to the number of U tubes of the second flow path 52.

[0034] On a branch of the first flow path 51, a second electromagnetic valve 9 is arranged on a pipeline on the side of the compressor 1. One end of a first electromagnetic valve 8 is connected to a pipeline between the second electromagnetic valve 9 and the first flow path 51, and the other end is connected to a pipeline between the four-way valve 2 and the indoor heat exchanger 3. In the heating mode, the pipeline between the four-way valve 2 and the indoor heat exchanger 3 is an exhaust pipeline of the compressor. Alternatively, the other end of the first electromagnetic valve 8 can be connected to a pipeline between the exhaust port of the compressor 1 and the four-way valve 2.

[0035] On a branch of the second flow path 52, a third solenoid valve 10 and a fourth solenoid valve 11 are respectively installed at both ends of the second flow path 52. The third solenoid valve 10 and the fourth solenoid valve 11 are synchronously controlled, that is, they open or close at the same time, so the positions of the third solenoid valve 10 and the fourth solenoid valve 11 can be interchanged.

[0036] On the pipeline between the outdoor heat exchanger 5 and the throttling component 4, a fifth solenoid valve 12 and a one-way valve 7 are connected in parallel. The one-way valve 7 is directed from the throttling component 4 to the outdoor heat exchanger 7.

[0037] In cooling mode, the first solenoid valve 8 and the one-way valve 7 are closed, while the second solenoid valve 9, the third solenoid valve 10, the fourth solenoid valve 11, and the fifth solenoid valve 12 are open. After the refrigerant is discharged from the compressor, it passes through the second solenoid valve 9 and the third solenoid valve 10 and enters the outdoor heat exchanger 5. The refrigerant undergoes heat exchange in the first flow path 51 and the second flow path 52. Afterward, the refrigerant passes through the fifth solenoid valve 12, the throttling component 4, the indoor heat exchanger 3, and the liquid receiver 6 in sequence before returning to the compressor 1.

[0038] In heating mode, the first flow path 51 always participates in refrigerant heat exchange. By controlling the opening and closing of the third solenoid valve 10 and the fourth solenoid valve 11, the participation of the second flow path 52 in refrigerant heat exchange can be controlled. Since refrigerant always flows through the first flow path 51, it is more prone to frosting. When the first flow path 51 needs to defrost, by controlling the opening and closing of the solenoid valves, high-temperature refrigerant is introduced into the first flow path 51 for defrosting. At the same time, the second flow path 52 is used for refrigerant evaporation, so that the air conditioner continues to operate in heating mode during defrosting, thereby avoiding a gradual decrease in indoor temperature during the defrosting process, which would affect comfort.

[0039] like Figure 1 The diagram shows a flowchart of an embodiment of the method of the present invention. The air conditioner control method may include steps S110 to S140.

[0040] In step S110, after the air conditioner turns on the heating mode, the first solenoid valve is in the closed state and the second solenoid valve is in the open state, and the outdoor temperature, the pipe temperature of the first flow path, and the pipe temperature of the second flow path are obtained.

[0041] In the heating mode, the second electromagnetic valve 9 and the one-way valve 7 are opened, the first electromagnetic valve 8 and the fifth electromagnetic valve 12 are closed, at this time, the refrigerant discharged from the compressor passes through the indoor heat exchanger 3, the throttling component 4, the one-way valve 7, the outdoor heat exchanger 5, the second electromagnetic valve 9 and the liquid accumulator 6 in turn and then returns to the compressor 1. The second flow path 52 can participate in the heat exchange of the refrigerant or not participate in the heat exchange of the refrigerant. When the second flow path 52 does not participate in the heat exchange of the refrigerant, the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are closed; when the second flow path 51 participates in the heat exchange of the refrigerant, the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are opened. The first flow path 51 always participates in the heat exchange of the refrigerant in the heating mode.

[0042] At step S120, the opening and closing of the third electromagnetic valve and the fourth electromagnetic valve are controlled according to the outdoor temperature and the pipe temperature of the second flow path.

[0043] In the first flow path defrosting, only the second flow path is used for the evaporation of the refrigerant, so as to ensure that the air conditioner has a certain heating capacity in the first flow path defrosting, it is necessary to ensure that the second flow path does not frost, therefore, whether the second flow path participates in the heat exchange in the heating mode is determined by the outdoor temperature.

[0044] In the heating mode, the second flow path participates in the evaporation of the refrigerant, which can improve the heating capacity of the air conditioner, make the indoor temperature reach the set temperature faster, and improve the comfort of the indoor environment.

[0045] In some embodiments, in step S120, the specific process of controlling the opening and closing of the third electromagnetic valve and the fourth electromagnetic valve according to the outdoor temperature and the pipe temperature of the second flow path includes steps S210 to S230.

[0046] At step S210, the size relationship between the outdoor temperature and the first preset temperature is determined.

[0047] At step S220, if the outdoor temperature is less than or equal to the first preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are controlled to be closed.

[0048] At step S230, if the outdoor temperature is greater than the first preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are controlled to be opened, and then the third electromagnetic valve and the fourth electromagnetic valve are controlled to be closed according to the pipe temperature of the second flow path.

[0049] In the process of air conditioning heating, the greater the heat exchange area of the outdoor heat exchanger, the more the refrigerant circulating in the system, and the greater the heat supply of the air conditioner, so that the indoor temperature reaches the set temperature faster, making the indoor environment comfortable. That is, the second flow path participates in refrigerant heat exchange in the heating mode, which can improve the heating efficiency of the air conditioner. In the defrosting process, the refrigerant circulating in the second flow path participates in heating, so in order to ensure normal heating of the air conditioner during defrosting, it is necessary to ensure that there is no frost on the second flow path before defrosting or that the pipe temperature of the second flow path is high. However, the participation of the second flow path in refrigerant heat exchange in the heating mode will lower the pipe temperature of the second flow path. Therefore, in order to improve the heating efficiency of the air conditioner while meeting the defrosting demand of the air conditioner, the participation of the second flow path in refrigerant heat exchange in the heating mode is controlled according to the outdoor temperature and the pipe temperature of the second flow path. Specifically, the first preset temperature can be set to 0℃, when the outdoor temperature is ≤0℃, the third electromagnetic valve and the fourth electromagnetic valve are closed, and the second flow path does not participate in refrigerant heat exchange; when the outdoor temperature is >0℃, the third electromagnetic valve and the fourth electromagnetic valve are opened, and the second flow path starts to participate in refrigerant heat exchange, thereby improving the heating efficiency of the air conditioner. However, the pipe temperature of the second flow path continues to decrease, and in order to avoid the pipe temperature of the second flow path being too low, the third electromagnetic valve and the fourth electromagnetic valve are controlled to be closed according to the pipe temperature of the second flow path.

[0050] In some embodiments, in step S230, the specific process of controlling the third electromagnetic valve and the fourth electromagnetic valve to be closed according to the pipe temperature of the second flow path includes: determining the size relationship between the pipe temperature of the second flow path and a second preset temperature; if the pipe temperature of the second flow path is less than or equal to the second preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are both controlled to be closed; and if the pipe temperature of the second flow path is greater than the second preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are kept open.

[0051] The second preset temperature can be set to 1℃, when the pipe temperature of the second flow path is >1℃, the third electromagnetic valve and the fourth electromagnetic valve are kept open, and the second flow path continues to participate in refrigerant heat exchange; when the pipe temperature of the second flow path is ≤1℃, it indicates that the pipe temperature of the second flow path is too low, and frost may occur, so the third electromagnetic valve and the fourth electromagnetic valve are closed, the second flow path ends refrigerant heat exchange, and the pipe temperature of the second flow path no longer decreases.

[0052] By controlling the participation of the second flow path in refrigerant heat exchange in the heating mode according to the outdoor temperature and the pipe temperature of the second flow path, the heating efficiency in the heating mode is improved under the premise that there is no frost on the second flow path during defrosting, so that the indoor temperature reaches the comfortable temperature faster, and the indoor comfort is improved.

[0053] At step S130, it is determined whether to switch to the defrosting mode according to the pipe temperature of the first flow path.

[0054] Since the first flow path is the main flow path during heating, the main flow path always has refrigerant evaporation heat exchange, and the first flow path is more prone to frost formation. Therefore, whether to switch to the defrosting mode to defrost the first flow path is determined according to the pipe temperature of the first flow path.

[0055] In some embodiments, in step S130, the specific process of determining whether to switch to the defrosting mode according to the pipe temperature of the first flow path includes: judging the size relationship between the pipe temperature of the first flow path and a preset defrosting temperature; if the pipe temperature of the first flow path is less than or equal to the preset defrosting temperature, it is determined to switch to the defrosting mode; and if the pipe temperature of the first flow path is greater than the preset defrosting temperature, it is not switched to the defrosting mode.

[0056] The preset defrosting temperature is the pipe temperature when the first flow path has frost formation. When the pipe temperature of the first flow path is greater than the preset defrosting temperature, it is considered that the first flow path has no frost formation, and the air conditioner continues to operate in the heating mode; and when the pipe temperature of the first flow path is less than or equal to the preset defrosting temperature, it is considered that the first flow path has frost formation, and needs to be defrosted, at which time the air conditioner is switched to the defrosting mode to defrost the first flow path.

[0057] In step S140, if it is determined to switch to the defrosting mode, the first electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are opened, the second electromagnetic valve is closed, and the frequency of the compressor and the opening degree of the throttling component are controlled according to the pipe temperature of the second flow path.

[0058] In the defrosting mode, the high-temperature refrigerant discharged by the compressor is used to defrost the first flow path, and the refrigerant evaporation required by the second flow path in the heating mode. Figure 3 As shown in FIG. 5, after the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are opened, the refrigerant condensed and released heat in the indoor heat exchanger 3 flows into the second flow path 52 in sequence after passing through the throttling component 4 and the one-way valve 7, and is evaporated to absorb heat. At the same time, the first electromagnetic valve 8 is opened and the second electromagnetic valve 9 is closed, so that the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the first flow path 51 through the first electromagnetic valve 8 to defrost the first flow path 51, and the defrosted refrigerant flows back into the compressor 1 in sequence after passing through the fourth electromagnetic valve 11, the second flow path 52 and the third electromagnetic valve 10. In order to avoid the flow of the defrosted refrigerant into the indoor side, the fifth electromagnetic valve 12 is closed, that is, the fifth electromagnetic valve 12 is always in a closed state in the heating mode and the defrosting mode. In the process of defrosting the first flow path, the frequency of the compressor and the opening degree of the throttling component are controlled according to the pipe temperature of the second flow path, the flow path of the refrigerant is adjusted, the pipe temperature of the second flow path is prevented from being too low to cause frost formation, and the normal operation of the air conditioner is ensured.

[0059] Through the air conditioner heating without stopping defrosting, the indoor is continuously heated, the indoor temperature is prevented from being reduced during the defrosting process to affect the comfort, and the user experience is improved.

[0060] In some embodiments, in step S140, the specific process of controlling the frequency of the compressor and the opening degree of the throttling component according to the tube temperature of the second flow path includes: judging the size relationship between the tube temperature of the second flow path and a third preset temperature; if the tube temperature of the second flow path is less than or equal to the third preset temperature, reducing the frequency of the compressor and the opening degree of the throttling component; if the tube temperature of the second flow path is greater than the third preset temperature, keeping the frequency of the compressor and the opening degree of the throttling component unchanged.

[0061] The third preset temperature is a temperature for preventing frost formation in the second flow path, which can be set to 1℃. When the tube temperature of the second flow path is ≤1℃, it is considered that the second flow path has a risk of frost formation, at this time, the opening degree of the throttling component is reduced or automatically adjusted by the PID mode, and the frequency of the compressor is reduced, so as to reduce the refrigerant flow in the system, reduce the heat exchange efficiency of the second flow path, and ensure that the second flow path does not frost. When the tube temperature of the second flow path is >1℃, it is considered that the second flow path will not frost, and the frequency of the compressor and the opening degree of the throttling component are kept unchanged. The heating effect reduced due to the reduction of the frequency of the compressor and the opening degree of the throttling component can be supplemented by turning on the electric auxiliary heating component or increasing the power of the electric auxiliary heating component. By adjusting the opening degree of the throttling component and the frequency of the compressor in the defrosting mode, frost formation in the second flow path is avoided, and stable heating for the indoor is ensured when defrosting, so as to avoid the decrease of the indoor temperature and affect the comfort.

[0062] In some embodiments, the air conditioner further comprises an electric auxiliary heating component; the electric auxiliary heating component is used for adjusting the outlet air temperature of the air conditioner. Since the outdoor heat exchanger is divided into two flow paths, if only one of the flow paths is used for heating, the heating capacity of the air conditioner is low, and the indoor temperature may be reduced, the indoor temperature may reach the set temperature for a long time, and the like, therefore, the electric auxiliary heating component is arranged in the air conditioner, and the outlet air temperature of the air conditioner is increased by using the electric auxiliary heating component, so as to maintain the indoor temperature and ensure the comfort of the indoor.

[0063] In some embodiments, the control method further comprises a process of controlling the action of the electric auxiliary heating component according to the outlet air temperature of the air conditioner, and the process specifically includes: obtaining the outlet air temperature of the air conditioner during the operation of the air conditioner in the heating mode or the defrosting mode; judging the size relationship between the outlet air temperature and a preset outlet air temperature; if the outlet air temperature is less than the preset outlet air temperature, turning on the electric auxiliary heating component; if the outlet air temperature is greater than or equal to the preset outlet air temperature, keeping the state of the electric auxiliary heating component unchanged.

[0064] Since the outdoor heat exchanger is divided into the first flow path and the second flow path, when only the first flow path or the second flow path participates in the heating cycle, the heating effect of the air conditioner is low, and the outlet air temperature of the air conditioner can not reach the preset outlet air temperature, thereby affecting the indoor comfort. Therefore, when the outlet air temperature does not reach the preset outlet air temperature in the heating mode and the defrosting mode, the electric auxiliary heating component is turned on, and the gear or power of the electric auxiliary heating component is automatically adjusted to increase the outlet air temperature of the air conditioner to the preset outlet air temperature. When the outlet air temperature reaches the preset outlet air temperature, the state of the electric auxiliary heating component is kept unchanged.

[0065] By adopting the technical scheme of the embodiment, the outdoor heat exchanger is divided into the first flow path and the second flow path, the first flow path defrosting and the second flow path participating in the heating cycle are controlled by using the electromagnetic valves, the first flow path participates in the refrigerant circulation in the heating mode, and the second flow path participates in the refrigerant circulation in the defrosting mode, so that the air conditioner defrosts without stopping heating, the indoor is continuously heated during the defrosting process, the indoor temperature is prevented from being reduced during defrosting, and the indoor comfort is ensured. And the refrigerant flow path in the outdoor heat exchanger is switched during defrosting, so that the defrosting does not affect the heating capacity of the air conditioner, and the use experience is improved.

[0066] According to the embodiment of the application, a control device of an air conditioner corresponding to a control method of the air conditioner is also provided. The air conditioner comprises an outdoor heat exchanger, a compressor, a throttling component, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, and a fourth electromagnetic valve. A first end of the outdoor heat exchanger is connected to the compressor through a four-way valve, and a second end of the outdoor heat exchanger is connected to the throttling component. The outdoor heat exchanger comprises a first flow path and a second flow path arranged in parallel. On a branch line where the first flow path is located, the second electromagnetic valve is arranged between the first flow path and the first end of the outdoor heat exchanger; one end of the first electromagnetic valve is connected to a pipeline between the second electromagnetic valve and the first flow path, and the other end of the first electromagnetic valve is connected to an exhaust pipeline of the compressor. On a branch line where the second flow path is located, the third electromagnetic valve and the fourth electromagnetic valve are arranged at two ends of the second flow path, respectively.

[0067] The structure of the air conditioner is shown in Figure 3 The air conditioner is shown in

[0068] The outdoor heat exchanger 5 comprises a first flow path 51 and a second flow path 52 in parallel. The first flow path 51 is a main flow path in which refrigerant flows in the heating mode, and the second flow path 52 is an auxiliary flow path in which refrigerant flows in the heating mode. The main flow path always has refrigerant flowing therethrough, and the auxiliary flow path only has refrigerant flowing therethrough in some cases. The number of U-tubes of the first flow path 51 is greater than or equal to the number of U-tubes of the second flow path 52.

[0069] On the branch of the first flow path 51, a second electromagnetic valve 9 is arranged on the pipe on the side of the compressor 1. One end of the first electromagnetic valve 8 is connected to the pipe between the second electromagnetic valve 9 and the first flow path 51, and the other end is connected to the pipe between the four-way valve 2 and the indoor heat exchanger 3. In the heating mode, the pipe between the four-way valve 2 and the indoor heat exchanger 3 is the discharge pipe of the compressor. Alternatively, the other end of the first electromagnetic valve 8 can be connected to the pipe between the discharge port of the compressor 1 and the four-way valve 2.

[0070] On the branch of the second flow path 52, a third electromagnetic valve 10 and a fourth electromagnetic valve 11 are arranged at the two ends of the second flow path 52, respectively. The third electromagnetic valve 10 and the fourth electromagnetic valve 11 are synchronously controlled, i.e., they are opened or closed at the same time, so the positions of the third electromagnetic valve 10 and the fourth electromagnetic valve 11 can be interchanged.

[0071] On the pipe between the outdoor heat exchanger 5 and the throttling component 4, a fifth electromagnetic valve 12 and a one-way valve 7 are arranged in parallel, and the one-way valve 7 is in a conductive direction from the throttling component 4 to the outdoor heat exchanger 7.

[0072] In the cooling mode, the first electromagnetic valve 8 and the one-way valve 7 are closed, and the second electromagnetic valve 9, the third electromagnetic valve 10, the fourth electromagnetic valve 11, and the fifth electromagnetic valve 12 are opened. After the refrigerant is discharged from the compressor, it passes through the second electromagnetic valve 9 and the third electromagnetic valve 10 and enters the outdoor heat exchanger 5, and the refrigerant exchanges heat in the first flow path 51 and the second flow path 52. Then, the refrigerant passes through the fifth electromagnetic valve 12, the throttling component 4, the indoor heat exchanger 3, and the liquid accumulator 6 in sequence and returns to the compressor 1.

[0073] In the heating mode, the first flow path 51 always participates in the heat exchange of the refrigerant, and the participation of the second flow path 52 in the heat exchange of the refrigerant can be controlled by controlling the opening and closing of the third electromagnetic valve 10 and the fourth electromagnetic valve 11. Since the first flow path 51 always has refrigerant flowing therethrough, the first flow path 51 is more prone to frosting. When the first flow path 51 needs to be defrosted, high-temperature refrigerant is introduced into the first flow path 51 for defrosting by controlling the opening and closing of the electromagnetic valves, and the evaporation of the refrigerant is performed using the second flow path 52, so that the air conditioner can maintain heating operation during defrosting, thereby avoiding the gradual decrease of the indoor temperature during the defrosting process and affecting comfort.

[0074] Referring to Figure 2A structural schematic diagram of an embodiment of the device of the application is shown. The control device of the air conditioner can include an acquisition unit 102 and a control unit 104.

[0075] The acquisition unit 102 is configured to acquire the outdoor temperature, the pipe temperature of the first flow path, and the pipe temperature of the second flow path when the first electromagnetic valve is in a closed state and the second electromagnetic valve is in an open state after the air conditioner starts the heating mode. The specific functions and processes of the acquisition unit 102 are described in step S110.

[0076] In the heating mode, the second electromagnetic valve 9 and the one-way valve 7 are open, and the first electromagnetic valve 8 and the fifth electromagnetic valve 12 are closed. At this time, the refrigerant discharged from the compressor passes through the indoor heat exchanger 3, the throttling component 4, the one-way valve 7, the outdoor heat exchanger 5, the second electromagnetic valve 9, and the liquid accumulator 6 in sequence and then returns to the compressor 1. The second flow path 52 can participate in the heat exchange of the refrigerant or not. When the second flow path 52 does not participate in the heat exchange of the refrigerant, the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are closed. When the second flow path 51 participates in the heat exchange of the refrigerant, the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are open. The first flow path 51 always participates in the heat exchange of the refrigerant in the heating mode.

[0077] The control unit 104 is configured to control the opening and closing of the third electromagnetic valve and the fourth electromagnetic valve according to the outdoor temperature and the pipe temperature of the second flow path. The specific functions and processes of the control unit 104 are described in step S120.

[0078] When the first flow path is defrosted, only the second flow path is used for the evaporation of the refrigerant. Therefore, in order to ensure that the air conditioner has a certain heating capacity when the first flow path is defrosted, it is necessary to ensure that the second flow path does not frost. Therefore, whether the second flow path participates in the heat exchange in the heating mode is determined by the outdoor temperature.

[0079] In the heating mode, the second flow path participates in the evaporation of the refrigerant, which can improve the heating capacity of the air conditioner, make the indoor temperature reach the set temperature faster, and improve the comfort of the indoor environment.

[0080] In some embodiments, the control unit 104 controls the opening and closing of the third electromagnetic valve and the fourth electromagnetic valve according to the outdoor temperature and the pipe temperature of the second flow path, including:

[0081] The control unit 104 is specifically configured to determine the size relationship between the outdoor temperature and a first preset temperature. The specific functions and processes of the control unit 104 are described in step S210.

[0082] The control unit 104 is further configured to control the third electromagnetic valve and the fourth electromagnetic valve to be closed if the outdoor temperature is less than or equal to a first preset temperature. The specific functions and processes of the control unit 104 are described with reference to step S220.

[0083] The control unit 104 is further configured to control the third electromagnetic valve and the fourth electromagnetic valve to be opened if the outdoor temperature is greater than the first preset temperature, and then control the third electromagnetic valve and the fourth electromagnetic valve to be closed according to the pipe temperature of the second flow path. The specific functions and processes of the control unit 104 are described with reference to step S230.

[0084] In the process of air conditioning heating, the greater the heat exchange area of the outdoor heat exchanger, the more the refrigerant circulating in the system, and the greater the heating capacity of the air conditioner, so that the indoor temperature reaches the set temperature faster, making the indoor environment comfortable. That is, the second flow path participates in refrigerant heat exchange in the heating mode, which can improve the heating efficiency of the air conditioner. In the first flow path defrosting, the refrigerant circulating in the second flow path participates in heating, so in order to ensure normal heating of the air conditioner during defrosting, it is necessary to ensure that there is no frost on the second flow path before defrosting or that the pipe temperature of the second flow path is high. However, the participation of the second flow path in refrigerant heat exchange in the heating mode will reduce the pipe temperature of the second flow path. Therefore, in order to improve the heating efficiency of the air conditioner while meeting the defrosting demand of the air conditioner, the participation of the second flow path in refrigerant heat exchange in the heating mode is controlled according to the outdoor temperature and the pipe temperature of the second flow path. Specifically, the first preset temperature can be set to 0℃, when the outdoor temperature is ≤0℃, the third electromagnetic valve and the fourth electromagnetic valve are closed, and the second flow path does not participate in refrigerant heat exchange; when the outdoor temperature is >0℃, the third electromagnetic valve and the fourth electromagnetic valve are opened, and the second flow path starts to participate in refrigerant heat exchange, thereby improving the heating efficiency of the air conditioner. Then, the pipe temperature of the second flow path continues to decrease, and in order to avoid the pipe temperature of the second flow path being too low, the third electromagnetic valve and the fourth electromagnetic valve are controlled to be closed according to the pipe temperature of the second flow path.

[0085] In some embodiments, the control unit 104 controls the third electromagnetic valve and the fourth electromagnetic valve to be closed according to the pipe temperature of the second flow path, including: judging the size relationship between the pipe temperature of the second flow path and a second preset temperature; if the pipe temperature of the second flow path is less than or equal to the second preset temperature, controlling the third electromagnetic valve and the fourth electromagnetic valve to be closed; if the pipe temperature of the second flow path is greater than the second preset temperature, keeping the third electromagnetic valve and the fourth electromagnetic valve opened.

[0086] The second preset temperature can be set to 1℃, when the pipe temperature of the second flow path is >1℃, the third electromagnetic valve and the fourth electromagnetic valve are kept opened, and the second flow path continues to participate in refrigerant heat exchange; when the pipe temperature of the second flow path is ≤1℃, it indicates that the pipe temperature of the second flow path is too low, and frost may occur, so the third electromagnetic valve and the fourth electromagnetic valve are closed, the second flow path ends refrigerant heat exchange, and the pipe temperature of the second flow path no longer decreases.

[0087] By controlling the heat exchange of the refrigerant in the second flow path in the heating mode according to the outdoor temperature and the pipe temperature of the second flow path, the heating efficiency in the heating mode is improved, the indoor comfort temperature is reached faster, and the indoor comfort is improved, on the premise that the second flow path is not frosted when defrosting is ensured.

[0088] The control unit 104 is further configured to determine whether to switch to the defrosting mode according to the pipe temperature of the first flow path. The specific functions and processes of the control unit 104 are described in step S130.

[0089] Since the first flow path is the main flow path during heating, the refrigerant is always evaporated and exchanged in the main flow path, and the first flow path is more likely to frost, so whether to switch to the defrosting mode is determined according to the pipe temperature of the first flow path to defrost the first flow path.

[0090] In some embodiments, the control unit 104 determines whether to switch to the defrosting mode according to the pipe temperature of the first flow path, including: determining the size relationship between the pipe temperature of the first flow path and the preset defrosting temperature; if the pipe temperature of the first flow path is less than or equal to the preset defrosting temperature, it is determined to switch to the defrosting mode; if the pipe temperature of the first flow path is greater than the preset defrosting temperature, it is not switched to the defrosting mode.

[0091] The preset defrosting temperature is the pipe temperature when the first flow path frosts. When the pipe temperature of the first flow path > the preset defrosting temperature, it is considered that the first flow path does not frost, and the air conditioner continues to operate in the heating mode; when the pipe temperature of the first flow path ≤ the preset defrosting temperature, it is considered that the first flow path frosts, and needs to be defrosted, at which time the air conditioner switches to the defrosting mode to defrost the first flow path.

[0092] The control unit 104 is further configured to open the first electromagnetic valve, the third electromagnetic valve, and the fourth electromagnetic valve, and close the second electromagnetic valve if it is determined to switch to the defrosting mode, and control the frequency of the compressor and the opening degree of the throttling component according to the pipe temperature of the second flow path. The specific functions and processes of the control unit 104 are described in step S140.

[0093] In the defrosting mode, the first flow path is defrosted by using the high-temperature refrigerant discharged by the compressor, and the refrigerant evaporated by the second flow path in the heating mode. For example, Figure 3As shown, after opening the third electromagnetic valve 10 and the fourth electromagnetic valve 11, the heat-released refrigerant in the indoor heat exchanger 3 flows into the second flow path 52 through the throttling component 4 and the one-way valve 7 in sequence to be evaporated and heat-absorbed. Meanwhile, the first electromagnetic valve 8 is opened and the second electromagnetic valve 9 is closed, so that the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the first flow path 51 through the first electromagnetic valve 8 to defrost the first flow path 51, and the defrosted refrigerant flows back into the compressor 1 through the fourth electromagnetic valve 11, the second flow path 52, and the third electromagnetic valve 10 in sequence. Among them, in order to avoid the refrigerant flowing into the indoor side after defrosting, the fifth electromagnetic valve 12 is closed, that is, the fifth electromagnetic valve 12 is always in a closed state in the heating mode and the defrosting mode. During defrosting of the first flow path, the frequency of the compressor and the opening degree of the throttling component are controlled according to the tube temperature of the second flow path to adjust the flow path of the refrigerant, avoid the tube temperature of the second flow path being too low to cause frosting, and ensure normal operation of the air conditioner.

[0094] Through the air conditioner heating without stopping defrosting, the indoor is continuously heated, the indoor temperature is prevented from being reduced during the defrosting process to affect the comfort, and the user experience is improved.

[0095] In some embodiments, the specific process of controlling the frequency of the compressor and the opening degree of the throttling component according to the tube temperature of the second flow path includes: judging the size relationship between the tube temperature of the second flow path and a third preset temperature; if the tube temperature of the second flow path is less than or equal to the third preset temperature, reducing the frequency of the compressor and the opening degree of the throttling component; and if the tube temperature of the second flow path is greater than the third preset temperature, keeping the frequency of the compressor and the opening degree of the throttling component unchanged.

[0096] The third preset temperature is a temperature for preventing frosting of the second flow path, which can be set to 1°C. When the tube temperature of the second flow path is ≤1°C, it is considered that the second flow path has a risk of frosting, at which time the opening degree of the throttling component is reduced or adjusted automatically in a PID mode, and the frequency of the compressor is reduced, so as to reduce the refrigerant flow in the system, reduce the heat exchange efficiency of the second flow path, and ensure that the second flow path does not frost. When the tube temperature of the second flow path is >1°C, it is considered that the second flow path will not frost, and the frequency of the compressor and the opening degree of the throttling component are kept unchanged. Among them, the heating effect reduced due to the reduction of the frequency of the compressor and the opening degree of the throttling component can be supplemented by opening the electric auxiliary heating component or increasing the power of the electric auxiliary heating component. By adjusting the opening degree of the throttling component and the frequency of the compressor in the defrosting mode, frosting of the second flow path is avoided, the air conditioner is ensured to stably supply heat to the indoor during defrosting, and the indoor temperature is prevented from being reduced to affect the comfort.

[0097] In some embodiments, the air conditioner further comprises an electric auxiliary heating component; the electric auxiliary heating component is used to adjust the outlet air temperature of the air conditioner. Since the outdoor heat exchanger is divided into two flow paths, if only one of the flow paths is used for heating, the heating capacity of the air conditioner is low, and the indoor temperature may be reduced, and the time for the indoor temperature to reach the set temperature is long, and the like, so the electric auxiliary heating component is arranged in the air conditioner, and the outlet air temperature of the air conditioner is increased by using the electric auxiliary heating component, so that the indoor temperature is not reduced, and the indoor comfort is ensured.

[0098] In some embodiments, the control unit 104 is further configured to: acquire the outlet air temperature of the air conditioner during the air conditioner is running in the heating mode or the defrosting mode; determine the size relationship between the outlet air temperature and the preset outlet air temperature; if the outlet air temperature is less than the preset outlet air temperature, turn on the electric auxiliary heating component; and if the outlet air temperature is greater than or equal to the preset outlet air temperature, keep the state of the electric auxiliary heating component unchanged.

[0099] Since the outdoor heat exchanger is divided into the first flow path and the second flow path, when only the first flow path or the second flow path participates in the heating cycle, the heating effect of the air conditioner is low, and the outlet air temperature of the air conditioner may not reach the preset outlet air temperature, thereby affecting the indoor comfort. Therefore, when the outlet air temperature does not reach the preset outlet air temperature in the heating mode and the defrosting mode, the electric auxiliary heating component is turned on, and the gear or power of the electric auxiliary heating component is automatically adjusted, so that the outlet air temperature of the air conditioner is increased to the preset outlet air temperature. When the outlet air temperature reaches the preset outlet air temperature, the state of the electric auxiliary heating component is kept unchanged.

[0100] Since the processing and functions realized by the device of the embodiment are basically corresponding to the embodiments, principles and examples of the foregoing method, details not described in the description of the embodiment can be referred to the related description in the foregoing embodiments, which will not be described herein.

[0101] By adopting the technical solution of the present application, the outdoor heat exchanger is divided into the first flow path and the second flow path, the first flow path defrosting and the second flow path participating in the heating cycle are controlled by using the electromagnetic valve, the first flow path participates in the refrigerant cycle in the heating mode, and the second flow path participates in the refrigerant cycle in the defrosting mode, so that the air conditioner defrosts without stopping heating, and the indoor heating is continuously provided during the defrosting process, thereby avoiding the indoor temperature from being reduced during defrosting, and ensuring the better indoor comfort. Moreover, the refrigerant flow path in the outdoor heat exchanger is switched during defrosting, so that the defrosting does not affect the heating capacity of the air conditioner, and the use experience is improved.

[0102] According to the embodiments of the present application, an air conditioner corresponding to the control device of the air conditioner is also provided. The air conditioner can comprise the control device of the air conditioner described above.

[0103] Since the processing and functions realized by the air conditioner of the embodiment are basically corresponding to the foregoing embodiments, principles and examples of the device, the description of the embodiment does not make a detailed description of the related description in the foregoing embodiments, which is not described herein.

[0104] The technical solution of the present application divides the outdoor heat exchanger into a first flow path and a second flow path, controls the first flow path defrosting and the second flow path participating in the heating cycle by using a solenoid valve, the first flow path participates in the refrigerant circulation in the heating mode, and the second flow path participates in the refrigerant circulation in the defrosting mode, so that the air conditioner defrosts without stopping heating, continuously supplies heat to the indoor during the defrosting process, avoids the indoor temperature from being reduced during defrosting, and ensures better indoor comfort. And switching the refrigerant flow path in the outdoor heat exchanger during defrosting ensures that defrosting will not affect the heating capacity of the air conditioner, improving the user experience.

[0105] According to the embodiment of the present application, a storage medium corresponding to the control method of the air conditioner is also provided, which comprises a stored program, wherein when the program runs, the device where the storage medium is located executes the control method of the air conditioner described above.

[0106] Since the processing and functions realized by the storage medium of the embodiment are basically corresponding to the foregoing embodiments, principles and examples of the method, the description of the embodiment does not make a detailed description of the related description in the foregoing embodiments, which is not described herein.

[0107] The technical solution of the present application divides the outdoor heat exchanger into a first flow path and a second flow path, controls the first flow path defrosting and the second flow path participating in the heating cycle by using a solenoid valve, the first flow path participates in the refrigerant circulation in the heating mode, and the second flow path participates in the refrigerant circulation in the defrosting mode, so that the air conditioner defrosts without stopping heating, continuously supplies heat to the indoor during the defrosting process, avoids the indoor temperature from being reduced during defrosting, and ensures better indoor comfort. And switching the refrigerant flow path in the outdoor heat exchanger during defrosting ensures that defrosting will not affect the heating capacity of the air conditioner, improving the user experience.

[0108] According to the embodiment of the present application, a computer program product corresponding to the control method of the air conditioner is also provided, which comprises a computer program, and the computer program product is processed to realize the steps of the control method of the air conditioner described above.

[0109] Since the processing and functions realized by the computer program product of the embodiment are basically corresponding to the foregoing embodiments, principles and examples of the method, the description of the embodiment does not make a detailed description of the related description in the foregoing embodiments, which is not described herein.

[0110] The technical scheme of the present application divides the outdoor heat exchanger into a first flow path and a second flow path, controls the first flow path defrosting and the second flow path participating in the heating cycle by using the electromagnetic valve, the first flow path participates in the refrigerant circulation in the heating mode, the second flow path participates in the refrigerant circulation in the defrosting mode, the air conditioner defrosts without stopping heating, the indoor is continuously heated during the defrosting process, the indoor temperature is prevented from being reduced during the defrosting, and the indoor comfort is ensured. And the refrigerant flow path in the outdoor heat exchanger is switched during the defrosting, the defrosting does not affect the heating capacity of the air conditioner, and the use experience is improved.

[0111] In summary, those skilled in the art can easily understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0112] The above only describes the embodiments of the present application and is not used to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A control method of an air conditioner, characterized by, The air conditioner comprises an outdoor heat exchanger, a compressor, a throttling component, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve; a first end of the outdoor heat exchanger is connected to the compressor, and a second end of the outdoor heat exchanger is connected to the throttling component; the outdoor heat exchanger comprises a first flow path and a second flow path arranged in parallel; on a branch where the first flow path is located, the second electromagnetic valve is arranged between the first flow path and the first end of the outdoor heat exchanger; one end of the first electromagnetic valve is connected to a pipeline between the second electromagnetic valve and the first flow path, and the other end is connected to an exhaust pipeline of the compressor; on a branch where the second flow path is located, the third electromagnetic valve and the fourth electromagnetic valve are arranged at two ends of the second flow path, respectively. The method comprises: After the air conditioner is started in a heating mode, the first electromagnetic valve is in a closed state, the second electromagnetic valve is in an open state, an outdoor temperature, a pipe temperature of the first flow path and a pipe temperature of the second flow path are acquired; The opening and closing of the third electromagnetic valve and the fourth electromagnetic valve are controlled according to the outdoor temperature and the pipe temperature of the second flow path; Whether to switch to a defrosting mode is determined according to the pipe temperature of the first flow path; If it is determined to switch to the defrosting mode, the first electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are opened, and the second electromagnetic valve is closed, and meanwhile, the frequency of the compressor and the opening degree of the throttling component are controlled according to the pipe temperature of the second flow path.

2. The control method of the air conditioner according to claim 1, characterized by, The opening and closing of the third electromagnetic valve and the fourth electromagnetic valve are controlled according to the outdoor temperature and the pipe temperature of the second flow path, which comprises: The size relationship between the outdoor temperature and a first preset temperature is judged; If the outdoor temperature is less than or equal to the first preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are both controlled to be closed; If the outdoor temperature is greater than the first preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are both controlled to be opened, and then the third electromagnetic valve and the fourth electromagnetic valve are controlled to be closed according to the pipe temperature of the second flow path.

3. The control method of the air conditioner according to claim 2, characterized by, The third electromagnetic valve and the fourth electromagnetic valve are controlled to be closed according to the pipe temperature of the second flow path, which comprises: The size relationship between the pipe temperature of the second flow path and a second preset temperature is judged; If the pipe temperature of the second flow path is less than or equal to the second preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are both controlled to be closed; If the pipe temperature of the second flow path is greater than the second preset temperature, the third electromagnetic valve and the fourth electromagnetic valve are both kept to be opened.

4. The control method of the air conditioner according to claim 1, characterized by, Whether to switch to the defrosting mode is determined according to the pipe temperature of the first flow path, which comprises: The size relationship between the pipe temperature of the first flow path and a preset defrosting temperature is judged; If the pipe temperature of the first flow path is less than or equal to the preset defrosting temperature, it is determined to switch to the defrosting mode; If the pipe temperature of the first flow path is greater than the preset defrosting temperature, it is not determined to switch to the defrosting mode.

5. The control method of an air conditioner according to any one of claims 1 to 4, characterized by, The frequency of the compressor and the opening degree of the throttling component are controlled according to the pipe temperature of the second flow path, which comprises: The size relationship between the pipe temperature of the second flow path and a third preset temperature is judged; if the pipe temperature of the second flow path is less than or equal to a third preset temperature, reducing the frequency of the compressor and the opening degree of the throttling component; if the pipe temperature of the second flow path is greater than the third preset temperature, keeping the frequency of the compressor and the opening degree of the throttling component unchanged.

6. The control method of the air conditioner according to any one of claims 1 to 4, characterized by The air conditioner further comprises an electric auxiliary heating component; The electric auxiliary heating component is configured to adjust the outlet air temperature of the air conditioner. The method further comprises: acquiring the outlet air temperature of the air conditioner during the operation of the air conditioner in the heating mode or the defrosting mode; determining the size relationship between the outlet air temperature and a preset outlet air temperature; if the outlet air temperature is less than the preset outlet air temperature, turning on the electric auxiliary heating component; if the outlet air temperature is greater than or equal to the preset outlet air temperature, keeping the state of the electric auxiliary heating component unchanged.

7. A control device of an air conditioner, characterized by comprising: The air conditioner comprises an outdoor heat exchanger, a compressor, a throttling component, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, and a fourth electromagnetic valve. A first end of the outdoor heat exchanger is connected to the compressor, and a second end of the outdoor heat exchanger is connected to the throttling component. The outdoor heat exchanger comprises a first flow path and a second flow path arranged in parallel. On a branch where the first flow path is located, the second electromagnetic valve is arranged between the first flow path and the first end of the outdoor heat exchanger; one end of the first electromagnetic valve is connected to a pipeline between the second electromagnetic valve and the first flow path, and the other end of the first electromagnetic valve is connected to an exhaust pipeline of the compressor. On a branch where the second flow path is located, the third electromagnetic valve and the fourth electromagnetic valve are arranged at two ends of the second flow path, respectively. The device comprises: an acquisition unit configured to acquire an outdoor temperature, a pipe temperature of the first flow path, and a pipe temperature of the second flow path when the first electromagnetic valve is in a closed state and the second electromagnetic valve is in an open state after the air conditioner is turned on in the heating mode; a control unit configured to control the opening and closing of the third electromagnetic valve and the fourth electromagnetic valve according to the outdoor temperature and the pipe temperature of the second flow path; the control unit is further configured to determine whether to switch to the defrosting mode according to the pipe temperature of the first flow path; the control unit is further configured to open the first electromagnetic valve, the third electromagnetic valve, and the fourth electromagnetic valve, and close the second electromagnetic valve if it is determined to switch to the defrosting mode, and to control the frequency of the compressor and the opening degree of the throttling component according to the pipe temperature of the second flow path.

8. An air conditioner characterized by comprising: The control device of the air conditioner of claim 7. The storage medium comprises a stored program, wherein the program controls the device where the storage medium is located to perform the control method of the air conditioner of any one of claims 1 to 6 when the program is executed.

9. A storage medium, characterized by The computer program is executed by a processor to implement the steps of the method of any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that, ​

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