Air conditioner control method and device, air conditioner, storage medium and program product

Abstract

The invention discloses an air conditioner control method and device, an air conditioner, a storage medium and a computer program product. An outdoor heat exchanger comprises a first flow path and a second flow path which are connected in parallel; a second electromagnetic valve is arranged on a branch of the first flow path; one end of the first solenoid valve is connected between the second solenoid valve and the first flow path, and the other end is connected to an exhaust pipeline of the compressor; a third electromagnetic valve and a fourth electromagnetic valve are respectively arranged on two sides of the second flow path; the method comprises the steps that after a heating mode is started, a first electromagnetic valve is closed, a second electromagnetic valve is opened, and opening and closing of a third electromagnetic valve and a fourth electromagnetic valve are controlled according to the outdoor temperature and the pipe temperature of a second flow path; and after the defrosting mode is switched to, 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. According to the scheme, defrosting is achieved through heating without shutdown, heat is continuously supplied to the indoor space, the indoor temperature is prevented from being reduced during defrosting, and the use experience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and specifically relates to a control method, device, air conditioner, storage medium and computer program product for an air conditioner, and more particularly to a control method, device, air conditioner, storage medium and computer program product for non-stop defrosting of an air conditioner. Background Art

[0002] When the air conditioner is defrosting in heating mode, the indoor unit fan is usually controlled to stop running, the four-way valve is switched, and the air conditioner is switched to cooling mode for defrosting. At this time, no heat is transported to the room, the indoor temperature continues to drop, affecting the indoor comfort.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The object of the present invention is to provide an air conditioner control method, device, air conditioner, storage medium and computer program product to solve the problem in related schemes that when the air conditioner is defrosted in heating mode, no heat is transported to the room, the indoor temperature continues to drop, and the indoor comfort is affected. The present invention can achieve defrosting without stopping the air conditioner for heating, continuously supply heat to the room, avoid the indoor temperature drop during defrosting, ensure good indoor comfort, and switch the refrigerant flow path in the outdoor heat exchanger during defrosting to ensure that defrosting does not affect the heating capacity of the air conditioner, thereby improving the user experience.

[0005] The present invention provides a control method for an air conditioner, the air conditioner comprising an outdoor heat exchanger, a compressor, a throttling component, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid 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; on a branch where the first flow path is located, the second solenoid valve is arranged between the first flow path and the first end of the outdoor heat exchanger; one end of the first solenoid valve is connected to a pipeline between the second solenoid valve and the first flow path, and the other end is connected to an exhaust pipeline of the compressor; on the branch where the second flow path is located, the The third solenoid valve and the fourth solenoid valve are respectively provided at both ends; the method comprises: after the air conditioner turns on the heating mode, the first solenoid valve is in a closed state, and the second solenoid valve is in an 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; the opening and closing of the third solenoid valve and the fourth solenoid valve are controlled according to the outdoor temperature and the pipe temperature of the second flow path; whether to switch to the defrost mode is determined according to the pipe temperature of the first flow path; if it is determined to switch to the defrost mode, the first solenoid valve, the third solenoid valve, and the fourth solenoid valve are opened, and the second solenoid valve is closed, and at the same time, 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, the opening and closing of the third solenoid valve and the fourth solenoid valve are controlled according to the outdoor temperature and the pipe temperature of the second flow path, including: judging the relationship between the outdoor temperature and the first preset temperature; if the outdoor temperature is less than or equal to the first preset temperature, controlling the third solenoid valve and the fourth solenoid valve to be closed; if the outdoor temperature is greater than the first preset temperature, controlling the third solenoid valve and the fourth solenoid valve to be opened, and then controlling the third solenoid valve and the fourth solenoid valve to be closed according to the pipe temperature of the second flow path.

[0007] In some embodiments, the third solenoid valve and the fourth solenoid valve are controlled to be closed according to the tube temperature of the second flow path, including: judging the relationship between the tube temperature of the second flow path and a second preset temperature; if the tube temperature of the second flow path is less than or equal to the second preset temperature, controlling the third solenoid valve and the fourth solenoid valve to be closed; if the tube temperature of the second flow path is greater than the second preset temperature, keeping the third solenoid valve and the fourth solenoid valve open.

[0008] In some embodiments, determining whether to switch to the defrost mode is based on the tube temperature of the first flow circuit, including: judging the relationship between the tube temperature of the first flow circuit and a preset defrost temperature; if the tube temperature of the first flow circuit is less than or equal to the preset defrost temperature, determining to switch to the defrost mode; if the tube temperature of the first flow circuit is greater than the preset defrost temperature, not switching to the defrost mode.

[0009] In some embodiments, the frequency of the compressor and the opening of the throttling component are controlled according to the pipe temperature of the second flow path, including: judging the 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, maintaining the frequency of the compressor and the opening of the throttling component unchanged.

[0010] In some embodiments, the air conditioner also includes an electric auxiliary heating component; the electric auxiliary heating component is used to adjust the air outlet temperature of the air conditioner; the method also includes: when the air conditioner is operating in a heating mode or a defrosting mode, obtaining the air outlet temperature of the air conditioner; judging the relationship between the air outlet temperature and a preset air outlet temperature; if the air outlet temperature is lower than the preset air outlet temperature, turning on the electric auxiliary heating component; if the air outlet temperature is greater than or equal to the preset air outlet temperature, keeping the state of the electric auxiliary heating component unchanged.

[0011] Matching the above method, the present invention provides a control device for an air conditioner on the other hand, the air conditioner includes an outdoor heat exchanger, a compressor, a throttling component, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid 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 includes a first flow path and a second flow path arranged in parallel; on the branch where the first flow path is located, the second solenoid valve is arranged between the first flow path and the first end of the outdoor heat exchanger; one end of the first solenoid valve is connected to the pipeline between the second solenoid valve and the first flow path, and the other end is connected to the exhaust pipeline of the compressor; on the branch where the second flow path is located, the third solenoid valve is respectively arranged at both ends of the second flow path and the fourth solenoid valve; the device comprises: an acquisition unit, configured to acquire the outdoor temperature, the pipe temperature of the first flow path, and the pipe temperature of the second flow path after the air conditioner turns on the heating mode, the first solenoid valve is in a closed state, and the second solenoid valve is in an open state; a control unit, configured to control the opening and closing of the third solenoid valve and the fourth solenoid valve according to the outdoor temperature and the pipe temperature of the second flow path; the control unit is also configured to determine whether to switch to the defrost mode according to the pipe temperature of the first flow path; the control unit is also configured to open the first solenoid valve, the third solenoid valve, and the fourth solenoid valve, and close the second solenoid valve if it is determined to switch to the defrost mode, and at the same time control the frequency of the compressor and the opening of the throttling component according to the pipe temperature of the second flow path.

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

[0013] In some embodiments, the control unit controls the third solenoid valve and the fourth solenoid valve to close according to the tube temperature of the second flow path, including: judging the relationship between the tube temperature of the second flow path and a second preset temperature; if the tube temperature of the second flow path is less than or equal to the second preset temperature, controlling the third solenoid valve and the fourth solenoid valve to close; if the tube temperature of the second flow path is greater than the second preset temperature, keeping the third solenoid valve and the fourth solenoid valve open.

[0014] In some embodiments, the control unit determines whether to switch to the defrost mode based on the tube temperature of the first flow path, including: judging the relationship between the tube temperature of the first flow path and a preset defrost temperature; if the tube temperature of the first flow path is less than or equal to the preset defrost temperature, determining to switch to the defrost mode; if the tube temperature of the first flow path is greater than the preset defrost temperature, not switching to the defrost mode.

[0015] In some embodiments, the control unit controls the frequency of the compressor and the opening of the throttling component according to the pipe temperature of the second flow path, including: judging the 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.

[0016] In some embodiments, the air conditioner also includes an electric auxiliary heating component; the electric auxiliary heating component is used to adjust the air outlet temperature of the air conditioner; the control unit is also configured to obtain the air outlet temperature of the air conditioner when the air conditioner is operating in a heating mode or a defrosting mode; determine the relationship between the air outlet temperature and a preset air outlet temperature; if the air outlet temperature is lower than the preset air outlet temperature, turn on the electric auxiliary heating component; if the air outlet temperature is greater than or equal to the preset air outlet temperature, keep the state of the electric auxiliary heating component unchanged.

[0017] Matching the above device, the present invention provides an air conditioner on another aspect, including: the control device of the air conditioner mentioned above.

[0018] In accordance with the above method, the present invention provides a storage medium on another aspect, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned air conditioning control method.

[0019] In accordance with the above method, the present invention provides a computer program product on another aspect, wherein the computer program product includes a computer program, and when the computer program product is processed and executed, the steps of the above air conditioner control method are implemented.

[0020] The solution of the present invention divides the outdoor heat exchanger into a first flow path and a second flow path, and uses a solenoid valve to control the defrosting of the first flow path and the participation of the second flow path in the heating cycle. In the heating mode, the first flow path participates in the refrigerant cycle, and in the defrosting mode, the second flow path participates in the refrigerant cycle, so that the air conditioner can be defrosted without stopping the heating. During the defrosting process, the indoor temperature is continuously supplied to avoid the decrease of the indoor temperature during defrosting, ensuring better indoor comfort. In addition, the refrigerant flow path in the outdoor heat exchanger is switched during defrosting to ensure that defrosting does not affect the heating capacity of the air conditioner, thereby improving the user experience.

[0021] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention.

[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a flow chart of an embodiment of a method for controlling an air conditioner of the present invention;

[0024] Figure 2 A schematic structural diagram of an embodiment of a control device for an air conditioner of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the air conditioner of the present invention.

[0026] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention 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 storage tank; 7- one-way valve; 8- first solenoid valve; 9- second solenoid valve; 10- third solenoid valve; 11- fourth solenoid valve; 12- fifth solenoid valve; 102- acquisition unit; 104- control unit. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] When the air conditioner is defrosted by reversing the four-way valve in heating mode, not only can the air conditioner not provide heat to the room during the defrosting period, but also a large reversing noise will be generated when the four-way valve is reversed, further reducing the user experience of the air conditioner. Some solutions pass high-temperature refrigerant into the inlet of the outdoor heat exchanger, so that the high-temperature refrigerant and the low-temperature refrigerant are mixed and flow into the outdoor heat exchanger, thereby increasing the refrigerant flowing into the outdoor heat exchanger for non-stop defrosting. This method will affect the heat exchange efficiency of the outdoor refrigerant, reduce the heating capacity of the air conditioner, and affect comfort.

[0030] Therefore, the present invention provides a control method for an air conditioner, in which the four-way valve does not reverse during defrosting, so that the air conditioner always supplies heat to the indoor room, and by switching the two flow paths of the outdoor heat exchanger, it is ensured that the outdoor refrigerant is completely heat exchanged, 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 present invention, a control method for an air conditioner is provided, wherein the air conditioner comprises an outdoor heat exchanger, a compressor, a throttling component, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve. The first end of the outdoor heat exchanger is connected to the compressor through a four-way valve, 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. On the branch where the first flow path is located, the second solenoid valve is arranged between the first flow path and the first end of the outdoor heat exchanger; one end of the first solenoid valve is connected to the pipeline between the second solenoid valve and the first flow path, and the other end is connected to the exhaust pipeline of the compressor. On the branch where the second flow path is located, the third solenoid valve and the fourth solenoid valve are arranged at both ends of the second flow path, respectively.

[0032] The structure of air conditioner Figure 3 As shown, the air inlet of the compressor 1 is connected to the outlet of the 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 is connected to the outdoor heat exchanger 5 through a throttling component 4.

[0033] The outdoor heat exchanger 5 includes a first flow path 51 and a second flow path 52 connected in parallel. The first flow path 51 is the main flow path for heat exchange of the refrigerant in the heating mode, and the second flow path 52 is the auxiliary flow path for heat exchange of the refrigerant in the heating mode. Refrigerant always flows through the main flow path, and refrigerant only flows through the auxiliary flow path in some cases. The number of U-tubes in the first flow path 51 is greater than or equal to the number of U-tubes in the second flow path 52.

[0034] On the branch of the first flow path 51, a second solenoid valve 9 is provided on the pipeline located on one side of the compressor 1. One end of the first solenoid valve 8 is connected to the pipeline between the second solenoid valve 9 and the first flow path 51, and the other end is connected to the 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 the exhaust pipeline of the compressor. Optionally, the other end of the first solenoid valve 8 can be connected to the pipeline between the exhaust port of the compressor 1 and the four-way valve 2.

[0035] On the branch of the second flow path 52, a third solenoid valve 10 and a fourth solenoid valve 11 are respectively arranged at both ends of the second flow path 52. The third solenoid valve 10 and the fourth solenoid valve 11 are synchronously controlled, i.e., opened or closed at the same time, so the setting 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 arranged in parallel, and the conducting direction of the one-way valve 7 is from the throttling component 4 to the outdoor heat exchanger 7 .

[0037] In the cooling mode, the first solenoid valve 8 and the one-way valve 7 are closed, and the second solenoid valve 9, the third solenoid valve 10, the fourth solenoid valve 11, and the fifth solenoid valve 12 are opened. After being discharged from the compressor, the refrigerant 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. Then, the refrigerant passes through the fifth solenoid valve 12, the throttling component 4, the indoor heat exchanger 3, and the liquid storage tank 6 in turn and returns to the compressor 1.

[0038] In the heating mode, the first flow path 51 is always involved in the heat exchange of the refrigerant, and whether the second flow path 52 is involved in the heat exchange of the refrigerant can be controlled by controlling the opening and closing of the third solenoid valve 10 and the fourth solenoid valve 11. Since the first flow path 51 always has refrigerant flowing through it, the first flow path 51 is more likely to frost. When the first flow path 51 needs to be defrosted, the solenoid valve is controlled to open and close so that the high-temperature refrigerant is passed into the first flow path 51 for defrosting, and the second flow path 52 is used to evaporate the refrigerant, so that the air conditioner maintains heating operation during defrosting, thereby avoiding the indoor temperature gradually decreasing during the defrosting process and affecting comfort.

[0039] like Figure 1 The flowchart of an embodiment of the method of the present invention is shown in FIG. 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 a closed state, and the second solenoid valve is in an 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 solenoid valve 9 and the one-way valve 7 are opened, and the first solenoid valve 8 and the fifth solenoid valve 12 are closed. At this time, the refrigerant is discharged from the compressor and passes through the indoor heat exchanger 3, the throttling component 4, the one-way valve 7, the outdoor heat exchanger 5, the second solenoid valve 9, and the liquid storage tank 6 in sequence before returning to the compressor 1. Among them, the second flow path 52 can participate in the heat exchange of the refrigerant, or it can 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 solenoid valve 10 and the fourth solenoid valve 11 are closed; when the second flow path 51 participates in the heat exchange of the refrigerant, the third solenoid valve 10 and the fourth solenoid valve 11 are opened. In the heating mode, the first flow path 51 always participates in the heat exchange of the refrigerant.

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

[0043] When the first flow path is defrosted, only the second flow path is used for 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 is not frosted. Therefore, whether the second flow path participates in 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 increase 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 solenoid valve and the fourth solenoid valve according to the outdoor temperature and the pipe temperature of the second flow path includes: steps S210 to S230.

[0046] Step S210, determining the magnitude relationship between the outdoor temperature and a first preset temperature.

[0047] Step S220: If the outdoor temperature is less than or equal to the first preset temperature, the third solenoid valve and the fourth solenoid valve are controlled to be closed.

[0048] Step S230: If the outdoor temperature is greater than the first preset temperature, the third solenoid valve and the fourth solenoid valve are controlled to be opened, and then the third solenoid valve and the fourth solenoid valve are controlled to be closed according to the pipe temperature of the second flow path.

[0049] During the heating process of the air conditioner, the larger the heat exchange area of ​​the outdoor heat exchanger, the more refrigerant the system circulates, the greater the heat supply of the air conditioner, and the faster the indoor temperature reaches the set temperature, making the indoor environment comfortable. That is, the second flow path in the heating mode participates in the refrigerant heat exchange, which can improve the heating efficiency of the air conditioner. When the first flow path is defrosted, the second flow path participates in the refrigerant circulation for heating. Therefore, in order to ensure the normal heating of the air conditioner during the defrosting process, it is necessary to ensure that the second flow path is not frosted before defrosting or the pipe temperature of the second flow path is high. In the heating mode, the second flow path participating in the refrigerant heat exchange 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 needs of the air conditioner, the second flow path is controlled to participate in the refrigerant heat exchange in the heating mode according to the outdoor temperature and the pipe temperature of the second flow path. Specifically, the first preset temperature can be set to 0°C. When the outdoor temperature is ≤0°C, the third solenoid valve and the fourth solenoid valve are closed, and the second flow path does not participate in the refrigerant heat exchange; when the outdoor temperature is >0°C, the third solenoid valve and the fourth solenoid valve are opened, and the second flow path begins to participate in the refrigerant heat exchange, thereby improving the heating efficiency of the air conditioner. After that, the pipe temperature of the second flow path continues to decrease. In order to avoid the pipe temperature of the second flow path being too low, the third solenoid valve and the fourth solenoid valve are closed according to the pipe temperature control of the second flow path.

[0050] In some embodiments, in step S230, the specific process of controlling the closing of the third solenoid valve and the fourth solenoid valve according to the tube temperature of the second flow path includes: judging the relationship between the tube temperature of the second flow path and the second preset temperature; if the tube temperature of the second flow path is less than or equal to the second preset temperature, controlling the third solenoid valve and the fourth solenoid valve to be closed; if the tube temperature of the second flow path is greater than the second preset temperature, keeping the third solenoid valve and the fourth solenoid valve open.

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

[0052] By controlling the second flow path to participate in the 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 while ensuring that there is no frost on the second flow path during defrosting, so that the indoor temperature reaches a comfortable temperature faster, thereby improving indoor comfort.

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

[0054] Since the first flow path is the main flow path during heating, there is always refrigerant evaporation and heat exchange in the main flow path, and the first flow path is more prone to frost. Therefore, whether to switch to the defrost 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 defrost mode based on the tube temperature of the first flow path includes: judging the relationship between the tube temperature of the first flow path and a preset defrost temperature; if the tube temperature of the first flow path is less than or equal to the preset defrost temperature, determining to switch to the defrost mode; if the tube temperature of the first flow path is greater than the preset defrost temperature, not switching to the defrost mode.

[0056] The preset defrost temperature is the pipe temperature when frosting occurs in the first flow path. When the pipe temperature of the first flow path is greater than the preset defrost temperature, it is considered that there is no frost in the first flow path, and the air conditioner continues to operate in the heating mode; when the pipe temperature of the first flow path is less than or equal to the preset defrost temperature, it is considered that frosting occurs in the first flow path and defrosting is required. At this time, the air conditioner switches to the defrost mode and defrosts the first flow path.

[0057] At step S140, if it is determined to switch to the defrost mode, the first solenoid valve, the third solenoid valve, and the fourth solenoid valve are opened, and the second solenoid valve is closed. At the same time, the frequency of the compressor and the opening 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 from the compressor is used to defrost the first flow path, and the refrigerant required for the heating mode is evaporated by the second flow path. Figure 3 As shown, after the third solenoid valve 10 and the fourth solenoid valve 11 are opened, the refrigerant after condensation and heat release in the indoor heat exchanger 3 passes through the throttling component 4 and the one-way valve 7 in sequence and flows into the second flow path 52 to evaporate and absorb heat. At the same time, the first solenoid valve 8 is opened and the second solenoid valve 9 is closed, so that the high-temperature and high-pressure refrigerant discharged from the compressor 1 passes through the first solenoid valve 8 and flows into the first flow path 51, and the first flow path 51 is defrosted. The defrosted refrigerant passes through the fourth solenoid valve 11, the second flow path 52, and the third solenoid valve 10 in sequence and returns to the compressor 1. Among them, in order to prevent the defrosted refrigerant from flowing into the indoor side, the fifth solenoid valve 12 is closed, that is, the fifth solenoid valve 12 is always closed 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 of the throttling component are controlled according to the pipe temperature of the second flow path, and the flow path of the refrigerant is adjusted to avoid the pipe temperature of the second flow path being too low and frosting, so as to ensure the normal operation of the air conditioner.

[0059] By heating with air conditioning and defrosting without stopping, continuous heating is provided to the room, avoiding the impact of comfort caused by the drop in indoor temperature during the defrosting process, and improving user experience.

[0060] In some embodiments, in step S140, the specific process of controlling the frequency of the compressor and the opening of the throttling component according to the pipe temperature of the second flow path includes: judging the 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, maintaining the frequency of the compressor and the opening of the throttling component unchanged.

[0061] The third preset temperature is the temperature to prevent frost on the second flow path, which can be set to 1°C. When the pipe temperature of the second flow path is ≤1°C, it is considered that there is a risk of frost on the second flow path. At this time, the opening of the throttling component is reduced or the opening of the throttling component is automatically adjusted by PID, and the frequency of the compressor is reduced, thereby reducing the refrigerant flow in the system, reducing the heat exchange efficiency of the second flow path, and ensuring that the second flow path does not frost. When the pipe temperature of the second flow path is greater than 1°C, it is considered that the second flow path will not frost, and the compressor frequency and the opening of the throttling component are kept unchanged. Among them, the heating effect reduced by reducing the compressor frequency and the throttling component opening can be supplemented by turning on the electric auxiliary heating component or increasing the power of the electric auxiliary heating component. By adjusting the throttling component opening and the compressor frequency in the defrost mode, frost on the second flow path is avoided, ensuring that the air conditioner stably heats the room during defrosting, and avoiding the indoor temperature from decreasing and affecting comfort.

[0062] In some embodiments, the air conditioner further includes 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 drop, and it may take a long time for the indoor temperature to reach the set temperature. Therefore, the electric auxiliary heating component is set in the air conditioner to increase the outlet air temperature of the air conditioner, maintain the indoor temperature from dropping, and ensure indoor comfort.

[0063] In some embodiments, the control method also includes a process of controlling the operation of the electric auxiliary heating component according to the air outlet temperature of the air conditioner, and the process specifically includes: when the air conditioner is operating in a heating mode or a defrosting mode, obtaining the air outlet temperature of the air conditioner; judging the relationship between the air outlet temperature and a preset air outlet temperature; if the air outlet temperature is lower than the preset air outlet temperature, turning on the electric auxiliary heating component; if the air outlet temperature is greater than or equal to the preset air outlet 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 air outlet temperature of the air conditioner may not reach the preset air outlet temperature, thus affecting indoor comfort. Therefore, in the heating mode and defrosting mode, when the air outlet temperature does not reach the preset air outlet temperature, 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 air outlet temperature of the air conditioner to the preset air outlet temperature. When the air outlet temperature reaches the preset air outlet temperature, the state of the electric auxiliary heating component remains unchanged.

[0065] By adopting the technical solution of this embodiment, the outdoor heat exchanger is divided into a first flow path and a second flow path. The first flow path is controlled by a solenoid valve to defrost and the second flow path is used to participate in the heating cycle. In heating mode, the first flow path participates in the refrigerant cycle, and in defrosting mode, the second flow path participates in the refrigerant cycle, so that the air conditioner can be defrosted without stopping the heating. During the defrosting process, the indoor temperature is continuously supplied to avoid the indoor temperature from dropping during defrosting, ensuring better indoor comfort. In addition, the refrigerant flow path in the outdoor heat exchanger is switched during defrosting to ensure that defrosting does not affect the heating capacity of the air conditioner, thereby improving the user experience.

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

[0067] The structure of air conditioner Figure 3 As shown, the air inlet of the compressor 1 is connected to the outlet of the 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 is connected to the outdoor heat exchanger 5 through a throttling component 4.

[0068] The outdoor heat exchanger 5 includes a first flow path 51 and a second flow path 52 connected in parallel. The first flow path 51 is the main flow path for heat exchange of the refrigerant in the heating mode, and the second flow path 52 is the auxiliary flow path for heat exchange of the refrigerant in the heating mode. Refrigerant always flows through the main flow path, and refrigerant only flows through the auxiliary flow path in some cases. The number of U-tubes in the first flow path 51 is greater than or equal to the number of U-tubes in the second flow path 52.

[0069] On the branch of the first flow path 51, a second solenoid valve 9 is provided on the pipeline located on one side of the compressor 1. One end of the first solenoid valve 8 is connected to the pipeline between the second solenoid valve 9 and the first flow path 51, and the other end is connected to the 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 the exhaust pipeline of the compressor. Optionally, the other end of the first solenoid valve 8 can be connected to the pipeline between the exhaust port of the compressor 1 and the four-way valve 2.

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

[0071] 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 arranged in parallel, and the conducting direction of the one-way valve 7 is from the throttling component 4 to the outdoor heat exchanger 7 .

[0072] In the cooling mode, the first solenoid valve 8 and the one-way valve 7 are closed, and the second solenoid valve 9, the third solenoid valve 10, the fourth solenoid valve 11, and the fifth solenoid valve 12 are opened. After being discharged from the compressor, the refrigerant 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. Then, the refrigerant passes through the fifth solenoid valve 12, the throttling component 4, the indoor heat exchanger 3, and the liquid storage tank 6 in turn and returns to the compressor 1.

[0073] In the heating mode, the first flow path 51 is always involved in the heat exchange of the refrigerant, and whether the second flow path 52 is involved in the heat exchange of the refrigerant can be controlled by controlling the opening and closing of the third solenoid valve 10 and the fourth solenoid valve 11. Since the first flow path 51 always has refrigerant flowing through it, the first flow path 51 is more likely to frost. When the first flow path 51 needs to be defrosted, the solenoid valve is controlled to open and close so that the high-temperature refrigerant is passed into the first flow path 51 for defrosting, and the second flow path 52 is used to evaporate the refrigerant, so that the air conditioner maintains heating operation during defrosting, thereby avoiding the indoor temperature gradually decreasing during the defrosting process and affecting comfort.

[0074] See also Figure 2The schematic diagram of the structure of an embodiment of the device of the present invention is shown. The control device of the air conditioner may 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 air conditioner turns on the heating mode and the first solenoid valve is in a closed state and the second solenoid valve is in an open state. The specific functions and processing of the acquisition unit 102 refer to step S110.

[0076] In the heating mode, the second solenoid valve 9 and the one-way valve 7 are opened, and the first solenoid valve 8 and the fifth solenoid valve 12 are closed. At this time, the refrigerant is discharged from the compressor and passes through the indoor heat exchanger 3, the throttling component 4, the one-way valve 7, the outdoor heat exchanger 5, the second solenoid valve 9, and the liquid storage tank 6 in sequence before returning to the compressor 1. Among them, the second flow path 52 can participate in the heat exchange of the refrigerant, or it can 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 solenoid valve 10 and the fourth solenoid valve 11 are closed; when the second flow path 51 participates in the heat exchange of the refrigerant, the third solenoid valve 10 and the fourth solenoid valve 11 are opened. In the heating mode, the first flow path 51 always participates in the heat exchange of the refrigerant.

[0077] The control unit 104 is configured to control the opening and closing of the third solenoid valve and the fourth solenoid valve according to the outdoor temperature and the pipe temperature of the second flow path. The specific functions and processing of the control unit 104 refer to step S120.

[0078] When the first flow path is defrosted, only the second flow path is used for 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 is not frosted. Therefore, whether the second flow path participates in 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 increase 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 implementations, the control unit 104 controls the opening and closing of the third solenoid valve and the fourth solenoid valve according to the outdoor temperature and the pipe temperature of the second flow path, including:

[0081] The control unit 104 is further configured to determine the magnitude relationship between the outdoor temperature and the first preset temperature. The specific functions and processing of the control unit 104 refer to step S210.

[0082] The control unit 104 is further configured to control the third solenoid valve and the fourth solenoid valve to be closed if the outdoor temperature is less than or equal to the first preset temperature. The specific functions and processing of the control unit 104 refer to step S220.

[0083] The control unit 104 is further configured to control the third solenoid valve and the fourth solenoid valve to open if the outdoor temperature is greater than the first preset temperature, and then control the third solenoid valve and the fourth solenoid valve to close according to the pipe temperature of the second flow path. The specific functions and processing of the control unit 104 refer to step S230.

[0084] During the heating process of the air conditioner, the larger the heat exchange area of ​​the outdoor heat exchanger, the more refrigerant the system circulates, the greater the heat supply of the air conditioner, and the faster the indoor temperature reaches the set temperature, making the indoor environment comfortable. That is, the second flow path in the heating mode participates in the refrigerant heat exchange, which can improve the heating efficiency of the air conditioner. When the first flow path is defrosted, the second flow path participates in the refrigerant circulation for heating. Therefore, in order to ensure the normal heating of the air conditioner during the defrosting process, it is necessary to ensure that the second flow path is not frosted before defrosting or the pipe temperature of the second flow path is high. In the heating mode, the second flow path participating in the refrigerant heat exchange 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 needs of the air conditioner, the second flow path is controlled to participate in the refrigerant heat exchange in the heating mode according to the outdoor temperature and the pipe temperature of the second flow path. Specifically, the first preset temperature can be set to 0°C. When the outdoor temperature is ≤0°C, the third solenoid valve and the fourth solenoid valve are closed, and the second flow path does not participate in the refrigerant heat exchange; when the outdoor temperature is >0°C, the third solenoid valve and the fourth solenoid valve are opened, and the second flow path begins to participate in the refrigerant heat exchange, thereby improving the heating efficiency of the air conditioner. After that, the pipe temperature of the second flow path continues to decrease. In order to avoid the pipe temperature of the second flow path being too low, the third solenoid valve and the fourth solenoid valve are closed according to the pipe temperature control of the second flow path.

[0085] In some embodiments, the control unit 104 controls the third solenoid valve and the fourth solenoid valve to close according to the pipe temperature of the second flow path, including: judging the 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 solenoid valve and the fourth solenoid valve to close; if the pipe temperature of the second flow path is greater than the second preset temperature, keeping the third solenoid valve and the fourth solenoid valve open.

[0086] The second preset temperature can be set to 1°C. When the pipe temperature of the second flow path is greater than 1°C, the third solenoid valve and the fourth solenoid valve are kept open, and the second flow path continues to participate in the refrigerant heat exchange; when the pipe temperature of the second flow path is ≤1°C, it means that the pipe temperature of the second flow path is too low and frost may occur, so the third solenoid valve and the fourth solenoid valve are closed, the second flow path ends the refrigerant heat exchange, and the pipe temperature of the second flow path no longer decreases.

[0087] By controlling the second flow path to participate in the 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 while ensuring that there is no frost on the second flow path during defrosting, so that the indoor temperature reaches a comfortable temperature faster, thereby improving indoor comfort.

[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 processing of the control unit 104 refer to step S130.

[0089] Since the first flow path is the main flow path during heating, there is always refrigerant evaporation and heat exchange in the main flow path, and the first flow path is more prone to frost. Therefore, whether to switch to the defrost mode to defrost the first flow path is determined according to the pipe temperature of the first flow path.

[0090] In some embodiments, the control unit 104 determines whether to switch to the defrost mode based on the tube temperature of the first flow path, including: judging the relationship between the tube temperature of the first flow path and a preset defrost temperature; if the tube temperature of the first flow path is less than or equal to the preset defrost temperature, determining to switch to the defrost mode; if the tube temperature of the first flow path is greater than the preset defrost temperature, not switching to the defrost mode.

[0091] The preset defrost temperature is the pipe temperature when frosting occurs in the first flow path. When the pipe temperature of the first flow path is greater than the preset defrost temperature, it is considered that there is no frost in the first flow path, and the air conditioner continues to operate in the heating mode; when the pipe temperature of the first flow path is less than or equal to the preset defrost temperature, it is considered that frosting occurs in the first flow path and defrosting is required. At this time, the air conditioner switches to the defrost mode and defrosts the first flow path.

[0092] The control unit 104 is further configured to, if it is determined to switch to the defrost mode, open the first solenoid valve, the third solenoid valve, and the fourth solenoid valve, close the second solenoid valve, and control the frequency of the compressor and the opening of the throttling component according to the pipe temperature of the second flow path. The specific functions and processing of the control unit 104 refer to step S140.

[0093] In the defrosting mode, the high-temperature refrigerant discharged from the compressor is used to defrost the first flow path, and the refrigerant required for the heating mode is evaporated by the second flow path. Figure 3As shown, after the third solenoid valve 10 and the fourth solenoid valve 11 are opened, the refrigerant after condensation and heat release in the indoor heat exchanger 3 passes through the throttling component 4 and the one-way valve 7 in sequence and flows into the second flow path 52 to evaporate and absorb heat. At the same time, the first solenoid valve 8 is opened and the second solenoid valve 9 is closed, so that the high-temperature and high-pressure refrigerant discharged from the compressor 1 passes through the first solenoid valve 8 and flows into the first flow path 51, and the first flow path 51 is defrosted. The defrosted refrigerant passes through the fourth solenoid valve 11, the second flow path 52, and the third solenoid valve 10 in sequence and returns to the compressor 1. Among them, in order to prevent the defrosted refrigerant from flowing into the indoor side, the fifth solenoid valve 12 is closed, that is, the fifth solenoid valve 12 is always closed 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 of the throttling component are controlled according to the pipe temperature of the second flow path, and the flow path of the refrigerant is adjusted to avoid the pipe temperature of the second flow path being too low and frosting, so as to ensure the normal operation of the air conditioner.

[0094] By heating with air conditioning and defrosting without stopping, continuous heating is provided to the room, avoiding the impact of comfort caused by the drop in indoor temperature during the defrosting process, and improving user experience.

[0095] In some embodiments, the control unit 104 controls the frequency of the compressor and the opening of the throttling component according to the pipe temperature of the second flow path, and the specific process includes: judging the 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, maintaining the frequency of the compressor and the opening of the throttling component unchanged.

[0096] The third preset temperature is the temperature to prevent frost on the second flow path, which can be set to 1°C. When the pipe temperature of the second flow path is ≤1°C, it is considered that there is a risk of frost on the second flow path. At this time, the opening of the throttling component is reduced or the opening of the throttling component is automatically adjusted by PID, and the frequency of the compressor is reduced, thereby reducing the refrigerant flow in the system, reducing the heat exchange efficiency of the second flow path, and ensuring that the second flow path does not frost. When the pipe temperature of the second flow path is greater than 1°C, it is considered that the second flow path will not frost, and the compressor frequency and the opening of the throttling component are kept unchanged. Among them, the heating effect reduced by reducing the compressor frequency and the throttling component opening can be supplemented by turning on the electric auxiliary heating component or increasing the power of the electric auxiliary heating component. By adjusting the throttling component opening and the compressor frequency in the defrost mode, frost on the second flow path is avoided, ensuring that the air conditioner stably heats the room during defrosting, and avoiding the indoor temperature from decreasing and affecting comfort.

[0097] In some embodiments, the air conditioner further includes 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 drop, and it may take a long time for the indoor temperature to reach the set temperature. Therefore, the electric auxiliary heating component is set in the air conditioner to increase the outlet air temperature of the air conditioner, maintain the indoor temperature from dropping, and ensure indoor comfort.

[0098] In some embodiments, the control unit 104 is further configured to: obtain the air outlet temperature of the air conditioner when the air conditioner is operating in the heating mode or the defrosting mode; determine the relationship between the air outlet temperature and the preset air outlet temperature; if the air outlet temperature is lower than the preset air outlet temperature, turn on the electric auxiliary heating component; if the air outlet temperature is greater than or equal to the preset air outlet 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 air outlet temperature of the air conditioner may not reach the preset air outlet temperature, thus affecting indoor comfort. Therefore, in the heating mode and defrosting mode, when the air outlet temperature does not reach the preset air outlet temperature, 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 air outlet temperature of the air conditioner to the preset air outlet temperature. When the air outlet temperature reaches the preset air outlet temperature, the state of the electric auxiliary heating component remains unchanged.

[0100] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0101] By adopting the technical solution of the present invention, the outdoor heat exchanger is divided into a first flow path and a second flow path. The first flow path is controlled by a solenoid valve to defrost and the second flow path is controlled to participate in the heating cycle. In the heating mode, the first flow path participates in the refrigerant cycle, and in the defrosting mode, the second flow path participates in the refrigerant cycle, so that the air conditioner can be defrosted without stopping the heating. During the defrosting process, the indoor temperature is continuously supplied to avoid the indoor temperature from decreasing during defrosting, ensuring better indoor comfort. In addition, the refrigerant flow path in the outdoor heat exchanger is switched during defrosting to ensure that defrosting does not affect the heating capacity of the air conditioner, thereby improving the user experience.

[0102] According to an embodiment of the present invention, an air conditioner corresponding to the control device of the air conditioner is also provided. The air conditioner may include: the control device of the air conditioner described above.

[0103] Since the processing and functions implemented by the air conditioner of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0104] By adopting the technical solution of the present invention, the outdoor heat exchanger is divided into a first flow path and a second flow path. The first flow path is controlled by a solenoid valve to defrost and the second flow path is controlled to participate in the heating cycle. In the heating mode, the first flow path participates in the refrigerant cycle, and in the defrosting mode, the second flow path participates in the refrigerant cycle, so that the air conditioner can be defrosted without stopping the heating. During the defrosting process, the indoor temperature is continuously supplied to avoid the indoor temperature from decreasing during defrosting, ensuring better indoor comfort. In addition, the refrigerant flow path in the outdoor heat exchanger is switched during defrosting to ensure that defrosting does not affect the heating capacity of the air conditioner, thereby improving the user experience.

[0105] According to an embodiment of the present invention, a storage medium corresponding to the air conditioner control method is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the air conditioner control method described above.

[0106] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0107] By adopting the technical solution of the present invention, the outdoor heat exchanger is divided into a first flow path and a second flow path. The first flow path is controlled by a solenoid valve to defrost and the second flow path is controlled to participate in the heating cycle. In the heating mode, the first flow path participates in the refrigerant cycle, and in the defrosting mode, the second flow path participates in the refrigerant cycle, so that the air conditioner can be defrosted without stopping the heating. During the defrosting process, the indoor temperature is continuously supplied to avoid the indoor temperature from decreasing during defrosting, ensuring better indoor comfort. In addition, the refrigerant flow path in the outdoor heat exchanger is switched during defrosting to ensure that defrosting does not affect the heating capacity of the air conditioner, thereby improving the user experience.

[0108] According to an embodiment of the present invention, a computer program product corresponding to the air conditioner control method is also provided, wherein the computer program product comprises a computer program, and when the computer program product is processed and executed, the steps of the air conditioner control method are implemented.

[0109] Since the processing and functions implemented by the computer program product of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0110] By adopting the technical solution of the present invention, the outdoor heat exchanger is divided into a first flow path and a second flow path. The first flow path is controlled by a solenoid valve to defrost and the second flow path is controlled to participate in the heating cycle. In the heating mode, the first flow path participates in the refrigerant cycle, and in the defrosting mode, the second flow path participates in the refrigerant cycle, so that the air conditioner can be defrosted without stopping the heating. During the defrosting process, the indoor temperature is continuously supplied to avoid the indoor temperature from decreasing during defrosting, ensuring better indoor comfort. In addition, the refrigerant flow path in the outdoor heat exchanger is switched during defrosting to ensure that defrosting does not affect the heating capacity of the air conditioner, thereby improving the user experience.

[0111] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0112] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner comprises an outdoor heat exchanger, a compressor, a throttling component, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid 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, a second solenoid valve is arranged between the first flow path and the first end of the outdoor heat exchanger; one end of the first solenoid valve is connected to a pipeline between the second solenoid 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 solenoid valve and the fourth solenoid valve are arranged at both ends of the second flow path respectively; The method comprises: After the air conditioner turns on the heating mode, the first solenoid valve is in a closed state, and the second solenoid valve is in an 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; Controlling the opening and closing of the third solenoid valve and the fourth solenoid valve according to the outdoor temperature and the pipe temperature of the second flow path; determining whether to switch to the defrost mode according to the pipe temperature of the first flow path; If it is determined to switch to the defrost mode, the first solenoid valve, the third solenoid valve, and the fourth solenoid valve are opened, and the second solenoid valve is closed. At the same time, the frequency of the compressor and the opening of the throttling component are controlled according to the pipe temperature of the second flow path.

2. The air conditioner control method according to claim 1, characterized in that: Controlling the opening and closing of the third solenoid valve and the fourth solenoid valve according to the outdoor temperature and the pipe temperature of the second flow path includes: Determining the magnitude 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 solenoid valve and the fourth solenoid valve are controlled to be closed; If the outdoor temperature is greater than the first preset temperature, the third solenoid valve and the fourth solenoid valve are both controlled to be opened, and then the third solenoid valve and the fourth solenoid valve are controlled to be closed according to the pipe temperature of the second flow path.

3. The air conditioner control method according to claim 2, characterized in that: Controlling the third solenoid valve and the fourth solenoid valve to close according to the pipe temperature of the second flow path includes: Determining the magnitude 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 solenoid valve and the fourth solenoid valve are controlled to be closed; If the pipe temperature of the second flow path is greater than a second preset temperature, the third solenoid valve and the fourth solenoid valve are kept open.

4. The air conditioner control method according to claim 1, characterized in that: Determining whether to switch to the defrost mode according to the pipe temperature of the first flow path includes: Determining the 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 defrost temperature, determining to switch to the defrost mode; If the pipe temperature of the first flow path is greater than the preset defrost temperature, the defrost mode is not switched.

5. The air conditioner control method according to any one of claims 1 to 4, characterized in that: Controlling the frequency of the compressor and the opening of the throttling component according to the pipe temperature of the second flow path includes: Determining the magnitude relationship between the tube 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 a 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, the frequency of the compressor and the opening degree of the throttling component are kept unchanged.

6. The air conditioner control method according to any one of claims 1 to 5, characterized in that: The air conditioner also includes an electric auxiliary heating component; The electric auxiliary heating component is used to adjust the air outlet temperature of the air conditioner; The method further comprises: When the air conditioner is operating in a heating mode or a defrosting mode, obtaining an air outlet temperature of the air conditioner; Determining the magnitude relationship between the outlet air temperature and a preset outlet air temperature; If the air outlet temperature is lower than the preset air outlet temperature, turning on the electric auxiliary heating component; If the air outlet temperature is greater than or equal to the preset air outlet temperature, the state of the electric auxiliary heating component is kept unchanged.

7. A control device for an air conditioner, characterized in that: The air conditioner comprises an outdoor heat exchanger, a compressor, a throttling component, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid 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 includes a first flow path and a second flow path arranged in parallel; On the branch where the first flow path is located, the second solenoid valve is arranged between the first flow path and the first end of the outdoor heat exchanger; one end of the first solenoid valve is connected to the pipeline between the second solenoid valve and the first flow path, and the other end is connected to the exhaust pipeline of the compressor; On the branch where the second flow path is located, the third solenoid valve and the fourth solenoid valve are respectively arranged at both ends of the second flow path; The device comprises: an acquisition unit, 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 air conditioner turns on the heating mode and the first solenoid valve is in the closed state and the second solenoid valve is in the open state; a control unit configured to control the opening and closing of the third solenoid valve and the fourth solenoid 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 also configured to open the first solenoid valve, the third solenoid valve, and the fourth solenoid valve, and close the second solenoid valve if it is determined to switch to the defrost mode, and at the same time control the frequency of the compressor and the opening of the throttling component according to the pipe temperature of the second flow path.

8. An air conditioner, characterized in that: include: The air conditioner control device as claimed in claim 7.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the air conditioner control method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

Images