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, indoor heat exchanger is divided into first part and second part, first part is equipped with first electric heating component and first inner fan, second part is equipped with second electric heating component and second inner fan, first part is equipped with first electronic expansion valve between outdoor heat exchanger, second part is equipped with second electronic expansion valve between outdoor heat exchanger;The method comprises: in heating mode, according to the pipe temperature of indoor and outdoor heat exchanger, indoor and outdoor temperature, the running time length of compressor determines whether defrosting is carried out, if it is determined to defrost, switch to refrigeration mode, and according to indoor temperature control first second electric heating component's opening and closing, first second inner fan's working state, first second electronic expansion valve's opening degree.The scheme, defrosting uses electric heating component to heat indoor and provide heat for defrosting, improve defrosting efficiency, shorten defrosting time, ensure indoor comfort.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and particularly relates to an air conditioner control method and device, an air conditioner, a storage medium, and a computer program product. BACKGROUND

[0002] During the heating operation of an air conditioner, the refrigerant evaporates and absorbs heat in the outdoor heat exchanger. When the outdoor humidity is high, the water vapor in the air will condense on the surface of the outdoor heat exchanger, thereby affecting the heat exchange capacity of the outdoor heat exchanger and reducing the performance of the air conditioner, affecting user comfort. Therefore, when the outdoor heat exchanger is frosted, the air conditioner will defrost, but if the defrosting time is too long, the indoor area will be unable to heat for a long time, reducing indoor comfort. If the defrosting time is too short, defrosting may not be complete, reducing the heating efficiency, and the air conditioner may frequently defrost, affecting user experience.

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

[0004] The present application aims to provide an air conditioner control method and device, an air conditioner, a storage medium, and a computer program product to solve the problem of excessive defrosting time or incomplete defrosting in related solutions, which reduces indoor comfort and affects user experience. By judging whether to defrost according to the heat exchanger tube temperature, indoor and outdoor temperatures, and the operating time of the compressor, the accuracy of defrosting judgment is improved. When defrosting, an electric heating component is used to provide heat for the indoor area and for defrosting, improving the defrosting efficiency and shortening the defrosting time. The problems of excessive defrosting time and incomplete defrosting are solved, ensuring the comfort of the indoor environment.

[0005] The application provides a control method of an air conditioner, wherein an indoor unit of the air conditioner has an indoor heat exchanger, a first indoor fan, a second indoor fan, a first electric heating component, a second electric heating component, a first electronic expansion valve and a second electronic expansion valve; the indoor heat exchanger is divided into a first part and a second part; the first electric heating component is arranged at the first part, and the second electric heating component is arranged at the second part; the first electronic expansion valve is arranged between the first part and an outdoor heat exchanger of the air conditioner, and the second electronic expansion valve is arranged between the second part and the outdoor heat exchanger; the first indoor fan corresponds to the first part, and the second indoor fan corresponds to the second part; the method comprises the following steps: in the process that the air conditioner runs in a heating mode, obtaining a pipe temperature of the indoor heat exchanger, a pipe temperature of the outdoor heat exchanger, an indoor environment temperature, an outdoor environment temperature and a running time length of a compressor of the air conditioner; determining whether to defrost according to the pipe temperature of the indoor heat exchanger, the pipe temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature and the running time length of the compressor; if it is determined to defrost, controlling the air conditioner to switch to a cooling mode, and then controlling the opening and closing of the first electric heating component and the second electric heating component, the working state of the first indoor fan and the second indoor fan and the opening degree of the first electronic expansion valve and the second electronic expansion valve according to the indoor environment temperature.

[0006] In some embodiments, the running time length of the compressor comprises a continuous running time length and a cumulative running time length; determining whether to defrost according to the pipe temperature of the indoor heat exchanger, the pipe temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature and the running time length of the compressor comprises: determining whether the indoor heat exchanger reaches a defrosting condition according to the pipe temperature of the indoor heat exchanger and the indoor environment temperature; determining whether the outdoor heat exchanger reaches a defrosting condition according to the pipe temperature of the outdoor heat exchanger and the outdoor environment temperature; determining whether the compressor reaches a defrosting condition according to the continuous running time length and the cumulative running time length; if the indoor heat exchanger and the outdoor heat exchanger both reach a defrosting condition or the compressor reaches a defrosting condition, it is determined to defrost.

[0007] In some embodiments, determining whether the indoor heat exchanger reaches the defrosting condition according to the tube temperature of the indoor heat exchanger and the indoor environment temperature comprises: determining whether the temperature drop of the tube temperature of the indoor heat exchanger is greater than or equal to a first preset temperature value every first time interval; simultaneously, determining whether the tube temperature of the indoor heat exchanger is less than a second preset temperature value for a second time interval; and determining whether the difference between the tube temperature of the indoor heat exchanger and the indoor environment temperature is less than or equal to a third preset temperature value; if the temperature drop of the tube temperature of the indoor heat exchanger is greater than or equal to the first preset temperature value, the tube temperature of the indoor heat exchanger is less than the second preset temperature value for the second time interval, and the difference between the tube temperature of the indoor heat exchanger and the indoor environment temperature is less than or equal to the third preset temperature value are simultaneously satisfied for a continuous preset number of times, it is determined that the indoor heat exchanger reaches the defrosting condition.

[0008] In some embodiments, determining whether the outdoor heat exchanger reaches the defrosting condition according to the tube temperature of the outdoor heat exchanger and the outdoor environment temperature comprises: determining the target range of the tube temperature of the outdoor heat exchanger according to the size of the outdoor environment temperature; the target range comprises a first target range, a second target range, a third target range, and a fourth target range; determining whether the tube temperature of the outdoor heat exchanger is in the target range, and determining whether the temperature drop of the tube temperature of the outdoor heat exchanger is greater than or equal to a fourth preset temperature value for a third time interval; if the tube temperature of the outdoor heat exchanger is in the target range, and the temperature drop of the tube temperature of the outdoor heat exchanger is greater than or equal to the fourth preset temperature value for the third time interval, it is determined that the outdoor heat exchanger reaches the defrosting condition; wherein, determining the target range of the tube temperature of the outdoor heat exchanger according to the size of the outdoor environment temperature comprises: if the outdoor environment temperature is in a first temperature interval, determining that the target range of the tube temperature of the outdoor heat exchanger is the first target range; if the outdoor environment temperature is in a second temperature interval, determining that the target range of the tube temperature of the outdoor heat exchanger is the second target range; if the outdoor environment temperature is in a third temperature interval, determining that the target range of the tube temperature of the outdoor heat exchanger is the third target range; the upper limit value of the third target range is the difference between the outdoor environment temperature and a fifth preset temperature value; if the outdoor environment temperature is in a fourth temperature interval, determining that the target range of the tube temperature of the outdoor heat exchanger is the fourth target range; the upper limit value of the fourth target range is the difference between the outdoor environment temperature and a sixth preset temperature value; the first temperature interval > the second temperature interval > the third temperature interval > the fourth temperature interval, the first target range > the second target range; the fifth preset temperature value > the sixth preset temperature value.

[0009] In some embodiments, further comprising: if the outdoor ambient temperature is in the third temperature interval or the fourth temperature interval, determining whether the accumulated running time is greater than or equal to a first preset time value; and if the accumulated running time is greater than or equal to the first preset time value, determining that the outdoor heat exchanger reaches the defrosting condition.

[0010] In some embodiments, determining whether the compressor reaches the defrosting condition according to the continuous running time and the accumulated running time comprises: determining whether the continuous running time is greater than or equal to a second preset time value; and determining whether the accumulated running time is greater than or equal to a third preset time value; and if the continuous running time is greater than or equal to the second preset time value and the accumulated running time is greater than or equal to the third preset time value, determining that the compressor reaches the defrosting condition.

[0011] In some embodiments, controlling the opening and closing of the first electric heating component and the second electric heating component, the working state of the first indoor fan and the second indoor fan, and the opening degree of the first electronic expansion valve and the second electronic expansion valve according to the indoor ambient temperature comprises: obtaining a defrosting time of a previous defrosting of the air conditioner and a defrosting time of a previous previous defrosting, denoted as a first defrosting time and a second defrosting time respectively; determining whether a temperature drop of the indoor ambient temperature is greater than or equal to a seventh preset temperature value, and determining whether the first defrosting time is greater than the second defrosting time, or whether a difference between the first defrosting time and the second defrosting time is greater than a preset difference value; if the temperature drop of the indoor ambient temperature is greater than or equal to the seventh preset temperature value, turning on the first electric heating component, turning on the first indoor fan and rotating in a forward direction, closing the first electronic expansion valve, and increasing the opening degree of the second electronic expansion valve according to a preset opening degree; at the same time, if the first defrosting time is greater than the second defrosting time, or the difference between the first defrosting time and the second defrosting time is greater than the preset difference value, turning on the second electric heating component, turning on the second indoor fan and rotating in a reverse direction; or turning on the second electric heating component, turning on the second indoor fan and rotating in a reverse direction, closing the second electronic expansion valve, and increasing the opening degree of the first electronic expansion valve according to a preset opening degree; at the same time, if the first defrosting time is greater than the second defrosting time, or the difference between the first defrosting time and the second defrosting time is greater than the preset difference value, turning on the first electric heating component, turning on the first indoor fan and rotating in a reverse direction.

[0012] Matching the above method, the present invention provides a control device for an air conditioner on the other hand, wherein the indoor unit of the air conditioner has an indoor heat exchanger, a first indoor fan, a second indoor fan, a first electric heating component, a second electric heating component, a first electronic expansion valve, and a second electronic expansion valve; the indoor heat exchanger is divided into a first part and a second part; the first electric heating component is arranged at the first part, and the second electric heating component is arranged at the second part; the first electronic expansion valve is arranged between the first part and the outdoor heat exchanger of the air conditioner, and the second electronic expansion valve is arranged between the second part and the outdoor heat exchanger; the first indoor fan corresponds to the first part, and the second indoor fan corresponds to the second part; the device includes: an acquisition unit, The controller is configured to obtain the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor ambient temperature, the outdoor ambient temperature, and the operating time of the compressor of the air conditioner during the operation of the air conditioner in the heating mode; the control unit is configured to determine whether to perform defrosting based on the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor ambient temperature, the outdoor ambient temperature, and the operating time of the compressor; the control unit is further configured to control the air conditioner to switch to the cooling mode if it is determined to perform defrosting, and then control the opening and closing of the first electric heating component and the second electric heating component, the working status of the first indoor fan and the second indoor fan, and the opening degree of the first electronic expansion valve and the second electronic expansion valve according to the indoor ambient temperature.

[0013] In some embodiments, the operating time of the compressor includes continuous operating time and cumulative operating time; the control unit determines whether to perform defrosting based on the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor ambient temperature, the outdoor ambient temperature, and the operating time of the compressor, including: determining whether the indoor heat exchanger reaches the defrost condition based on the tube temperature of the indoor heat exchanger and the indoor ambient temperature; determining whether the outdoor heat exchanger reaches the defrost condition based on the tube temperature of the outdoor heat exchanger and the outdoor ambient temperature; determining whether the compressor reaches the defrost condition based on the continuous operating time and the cumulative operating time; if both the indoor heat exchanger and the outdoor heat exchanger reach the defrost conditions, or the compressor reaches the defrost conditions, it is determined to perform defrosting.

[0014] In some embodiments, the control unit determines whether the indoor heat exchanger reaches the defrosting condition according to the tube temperature of the indoor heat exchanger and the indoor environment temperature, including: determining whether the temperature drop of the tube temperature of the indoor heat exchanger is greater than or equal to a first preset temperature value every first time interval; simultaneously, determining whether the tube temperature of the indoor heat exchanger is less than a second preset temperature value for a second time interval; and determining whether the difference between the tube temperature of the indoor heat exchanger and the indoor environment temperature is less than or equal to a third preset temperature value; if the temperature drop of the tube temperature of the indoor heat exchanger is greater than or equal to the first preset temperature value, the tube temperature of the indoor heat exchanger is less than the second preset temperature value for the second time interval, and the difference between the tube temperature of the indoor heat exchanger and the indoor environment temperature is less than or equal to the third preset temperature value are simultaneously satisfied for a continuous preset number of times, it is determined that the indoor heat exchanger reaches the defrosting condition.

[0015] In some embodiments, the control unit determines whether the outdoor heat exchanger reaches the defrosting condition according to the tube temperature of the outdoor heat exchanger and the outdoor environment temperature, including: determining the target range of the tube temperature of the outdoor heat exchanger according to the size of the outdoor environment temperature; the target range includes a first target range, a second target range, a third target range, and a fourth target range; determining whether the tube temperature of the outdoor heat exchanger is in the target range, and determining whether the temperature drop of the tube temperature of the outdoor heat exchanger is greater than or equal to a fourth preset temperature value for a third time interval; if the tube temperature of the outdoor heat exchanger is in the target range, and the temperature drop of the tube temperature of the outdoor heat exchanger is greater than or equal to the fourth preset temperature value for the third time interval, it is determined that the outdoor heat exchanger reaches the defrosting condition; wherein the control unit determines the target range of the tube temperature of the outdoor heat exchanger according to the size of the outdoor environment temperature, including: if the outdoor environment temperature is in a first temperature interval, the target range of the tube temperature of the outdoor heat exchanger is determined as the first target range; if the outdoor environment temperature is in a second temperature interval, the target range of the tube temperature of the outdoor heat exchanger is determined as the second target range; if the outdoor environment temperature is in a third temperature interval, the target range of the tube temperature of the outdoor heat exchanger is determined as the third target range; the upper limit value of the third target range is the difference between the outdoor environment temperature and a fifth preset temperature value; if the outdoor environment temperature is in a fourth temperature interval, the target range of the tube temperature of the outdoor heat exchanger is determined as the fourth target range; the upper limit value of the fourth target range is the difference between the outdoor environment temperature and a sixth preset temperature value; the first temperature interval > the second temperature interval > the third temperature interval > the fourth temperature interval, the first target range > the second target range; the fifth preset temperature value > the sixth preset temperature value.

[0016] In some embodiments, the control unit further comprises: if the outdoor environment temperature is in the third temperature interval or the fourth temperature interval, determining whether the cumulative running time is greater than or equal to a first preset time value; and if the cumulative running time is greater than or equal to the first preset time value, determining that the outdoor heat exchanger reaches the defrosting condition.

[0017] In some embodiments, the control unit determines whether the compressor reaches the defrosting condition according to the continuous running time and the cumulative running time, comprising: determining whether the continuous running time is greater than or equal to a second preset time value; and determining whether the cumulative running time is greater than or equal to a third preset time value; if the continuous running time is greater than or equal to the second preset time value and the cumulative running time is greater than or equal to the third preset time value, determining that the compressor reaches the defrosting condition.

[0018] In some embodiments, the control unit controls the opening and closing of the first electric heating component and the second electric heating component, the working state of the first indoor fan and the second indoor fan, and the opening degree of the first electronic expansion valve and the second electronic expansion valve according to the indoor environment temperature, comprising: obtaining the defrosting time of the last defrosting and the defrosting time of the second last defrosting of the air conditioner, and recording them as the first defrosting time and the second defrosting time respectively; determining whether the temperature drop of the indoor environment temperature is greater than or equal to a seventh preset temperature value, and determining whether the first defrosting time is greater than the second defrosting time, or whether the difference between the first defrosting time and the second defrosting time is greater than a preset difference value; if the temperature drop of the indoor environment temperature is greater than or equal to the seventh preset temperature value, turning on the first electric heating component, turning on the first indoor fan and rotating in the forward direction, closing the first electronic expansion valve, and increasing the opening degree of the second electronic expansion valve according to a preset opening degree; at the same time, if the first defrosting time is greater than the second defrosting time, or the difference between the first defrosting time and the second defrosting time is greater than the preset difference value, turning on the second electric heating component, turning on the second indoor fan and rotating in the reverse direction; or, turning on the second electric heating component, turning on the second indoor fan and rotating in the reverse direction, closing the second electronic expansion valve, and increasing the opening degree of the first electronic expansion valve according to a preset opening degree; at the same time, if the first defrosting time is greater than the second defrosting time, or the difference between the first defrosting time and the second defrosting time is greater than the preset difference value, turning on the first electric heating component, turning on the first indoor fan and rotating in the reverse direction.

[0019] In order to match the above-mentioned device, the air conditioner is provided in another aspect of the present application, comprising: the control device of the air conditioner described above.

[0020] According to the method, the application provides a storage medium including a stored program, wherein the program controls the device where the storage medium is located to execute the control method of the air conditioner when the program is running.

[0021] According to the method, the application provides a computer program product including a computer program, which realizes the steps of the control method of the air conditioner when the computer program product is processed.

[0022] According to the scheme of the application, the indoor heat exchanger is divided into a first part and a second part, the first part is provided with a first electric heating component and a first indoor fan, the second part is provided with a second electric heating component and a second indoor fan, the first part is provided with a first electronic expansion valve between the first part and the outdoor heat exchanger, and the second part is provided with a second electronic expansion valve between the second part and the outdoor heat exchanger; in the heating mode, whether defrosting is performed is determined according to the pipe temperature of the indoor heat exchanger, the pipe temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature and the running time length of the compressor, if it is determined that defrosting is performed, the air conditioner is controlled to switch to the cooling mode, and then the opening and closing of the first electric heating component and the second electric heating component, the working state of the first indoor fan and the second indoor fan and the opening degree of the first electronic expansion valve and the second electronic expansion valve are controlled according to the indoor environment temperature. Whether defrosting is performed is determined according to the pipe temperature of the heat exchanger, the indoor and outdoor temperatures and the running time length of the compressor, the accuracy of defrosting determination is improved, the electric heating component is used to provide heat for the indoor and defrosting when defrosting, the defrosting efficiency is improved, the defrosting time is shortened, the situation that the defrosting time is too long and the defrosting is not complete is avoided, and the indoor environment comfort is ensured.

[0023] Other features and advantages of the 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.

[0024] The technical scheme of the application will be further described in detail below with reference to the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a flowchart of an embodiment of the control method of the air conditioner of the application.

[0026] Figure 2 It is a structural schematic diagram of an embodiment of the control device of the air conditioner of the application.

[0027] Figure 3 It is a system structure diagram of the air conditioner of the application.

[0028] Figure 4 It is a structural schematic diagram of the indoor unit of the air conditioner of the application.

[0029] In the embodiments of the present application, the reference signs are as follows in combination with the drawings:

[0030] 1-compressor; 2-four-way valve; 3-outdoor heat exchanger; 4-outdoor fan; 5-first electronic expansion valve; 6-second electronic expansion valve; 7-indoor heat exchanger; 71-first part of indoor heat exchanger; 72-second part of indoor heat exchanger; 8-second indoor fan; 9-first indoor fan; 10-second electric heating component; 11-first electric heating component; 102-acquiring unit; 104-control unit. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described 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 effort fall within the scope of protection of the present application.

[0032] According to an embodiment of the present application, a control method of an air conditioner is provided, the indoor unit of the air conditioner has an indoor heat exchanger, a first indoor fan, a second indoor fan, a first electric heating component, a second electric heating component, a first electronic expansion valve and a second electronic expansion valve; the indoor heat exchanger is divided into a first part and a second part; the first electric heating component is arranged at the first part, and the second electric heating component is arranged at the second part. The first electronic expansion valve is arranged between the first part and an outdoor heat exchanger of the air conditioner, and the second electronic expansion valve is arranged between the second part and the outdoor heat exchanger. Specifically, one end of the first part and one end of the outdoor heat exchanger of the air conditioner are connected through the first electronic expansion valve, and one end of the second part and one end of the outdoor heat exchanger of the air conditioner are connected through the second electronic expansion valve; the other end of the first part and the other end of the second part are respectively connected to the same valve port of a four-way valve of the air conditioner, and the other end of the outdoor heat exchanger is connected to the other valve port of the four-way valve; the other two valve ports of the four-way valve are respectively connected to the suction port and the discharge port of the compressor of the air conditioner, and by changing the connection relationship between the valve ports of the four-way valve, the air conditioner can work in a heating mode or a cooling mode. In the heating mode and the cooling mode, the first electronic expansion valve and the second electronic expansion valve both play a throttling role.

[0033] The first indoor fan corresponds to the first part, and the second indoor fan corresponds to the second part. The indoor unit of the air conditioner has a first air outlet and a second air outlet, and when the first indoor fan is running in forward rotation, the heat-exchanged air can be discharged from the first air outlet, and when the second indoor fan is running in forward rotation, the heat-exchanged air can be discharged from the second air outlet. The specific structure of the air conditioner is as followsFigure 3 and Figure 4 As shown in the figure, the outdoor unit of the air conditioner comprises a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, and an outdoor fan 4. The indoor unit comprises a first electronic expansion valve 5, a second electronic expansion valve 6, an indoor heat exchanger 7, a second indoor fan 8, a first indoor fan 9, a second electric heating component 10, and a first electric heating component 11.

[0034] The indoor heat exchanger 7 is divided into an indoor heat exchanger first part 71 and an indoor heat exchanger second part 72. The first electronic expansion valve 5 can regulate the flow of refrigerant flowing into the indoor heat exchanger first part 71 from this side. At the position of the indoor heat exchanger first part 71, the first indoor fan 9 and the first electric heating component 11 are arranged. The first electric heating component 11 is arranged between the first indoor fan 9 and the indoor heat exchanger first part 71. When the first indoor fan 9 is normally working, it can make indoor air exchange heat with the indoor heat exchanger first part 71 or the first electric heating component 11. The second electronic expansion valve 6 can regulate the flow of refrigerant flowing into the indoor heat exchanger second part 72 from this side. At the position of the indoor heat exchanger second part 72, the second indoor fan 8 and the second electric heating component 10 are arranged. The second electric heating component 10 is arranged between the second indoor fan 8 and the indoor heat exchanger second part 72. When the second indoor fan 8 is normally working, it can make indoor air exchange heat with the indoor heat exchanger second part 72 or the second electric heating component 10. Figure 4 In the embodiment, the indoor heat exchanger first part 71 and the indoor heat exchanger second part 72 share a refrigerant outlet. When the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger, the refrigerant exchanges heat in the indoor heat exchanger first part 71 and the indoor heat exchanger second part 72 and then flows out from the same outlet.

[0035] As shown in the figure, the outdoor unit of the air conditioner comprises a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, and an outdoor fan 4. The indoor unit comprises a first electronic expansion valve 5, a second electronic expansion valve 6, an indoor heat exchanger 7, a second indoor fan 8, a first indoor fan 9, a second electric heating component 10, and a first electric heating component 11. Figure 1 As shown in the figure, the outdoor unit of the air conditioner comprises a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, and an outdoor fan 4. The indoor unit comprises a first electronic expansion valve 5, a second electronic expansion valve 6, an indoor heat exchanger 7, a second indoor fan 8, a first indoor fan 9, a second electric heating component 10, and a first electric heating component 11.

[0036] At step S110, during the operation of the air conditioner in the heating mode, the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature, and the operation time length of the compressor of the air conditioner are obtained.

[0037] In the heating mode, the first part and the second part of the indoor heat exchanger both exchange heat, the control strategies of the first electronic expansion valve and the second electronic expansion valve are the same, and there is no temperature difference between the first part and the second part, so any one of the temperature of the middle part of the indoor heat exchanger, the tube temperature of the first part, and the tube temperature of the second part can be taken as the tube temperature of the indoor heat exchanger. At the same time, the temperature of the middle part of the outdoor heat exchanger can be taken as the tube temperature of the outdoor heat exchanger. The indoor environment temperature can be detected by the temperature sensor arranged at the air inlet of the indoor unit.

[0038] At step S120, whether defrosting is performed is determined according to the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor ambient temperature, the outdoor ambient temperature, and the running time length of the compressor.

[0039] In some embodiments, the running time length of the compressor includes a continuous running time length and an accumulated running time length. The continuous running time length of the compressor is counted from the time when the tube temperature of the outdoor heat exchanger is detected to be ≤ 3 ℃ for 3 s continuously. During the counting, if the tube temperature of the outdoor heat exchanger is detected to be > 3 ℃ for 3 s continuously, the counting is stopped, and the continuous running time length is cleared. The accumulated running time length is counted from the time when the compressor is started. When the compressor is stopped for 2 h, or the air conditioner is switched to the cooling mode or the dehumidifying mode, the accumulated running time length is cleared.

[0040] In some embodiments, at step S120, the specific process of determining whether defrosting is performed according to the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor ambient temperature, the outdoor ambient temperature, and the running time length of the compressor includes steps S210 to S240.

[0041] At step S210, whether the indoor heat exchanger reaches a defrosting condition is determined according to the tube temperature of the indoor heat exchanger and the indoor ambient temperature.

[0042] In some embodiments, at step S210, the specific process of determining whether the indoor heat exchanger reaches a defrosting condition according to the tube temperature of the indoor heat exchanger and the indoor ambient temperature includes steps S310 and S320.

[0043] At step S310, every first time interval, whether the temperature drop of the tube temperature of the indoor heat exchanger is greater than or equal to a first preset temperature value, whether the tube temperature of the indoor heat exchanger is less than a second preset temperature value for a second time interval, and whether the difference between the tube temperature of the indoor heat exchanger and the indoor ambient temperature is less than or equal to a third preset temperature value are determined.

[0044] At step S320, if the temperature drop of the tube temperature of the indoor heat exchanger is greater than or equal to the first preset temperature value, the tube temperature of the indoor heat exchanger is less than the second preset temperature value for the second time interval, and the difference between the tube temperature of the indoor heat exchanger and the indoor ambient temperature is less than or equal to the third preset temperature value are simultaneously satisfied for a preset number of times, it is determined that the indoor heat exchanger reaches a defrosting condition.

[0045] After the air conditioner is started, whether the indoor heat exchanger reaches the defrosting condition is determined after the compressor is continuously operated for 10 minutes. The first time can be set to 6 minutes, the second time can be set to 30 seconds, the first preset temperature value can be set to 2°C, and the second preset temperature value can be set to 54°C. The control strategy of the first indoor fan and the second indoor fan in the heating mode is the same. The third preset temperature value is related to the speed of the indoor fan. The greater the speed, the smaller the third preset temperature value. For example, when the indoor fan is in the low wind gear, it is set to 20°C, when the indoor fan is in the medium wind gear, it is set to 18°C, when the indoor fan is in the high wind gear, it is set to 17°C, and when the indoor fan is in the super high wind gear, it is set to 16°C. The temperature drop of the tube temperature of the indoor heat exchanger is obtained by subtracting the tube temperature at the end of the first time from the tube temperature at the beginning of the first time. Therefore, when determining whether the indoor heat exchanger reaches the defrosting condition, when the tube temperature of the indoor heat exchanger drops by ≥2°C within 6 minutes and continuously occurs twice, the tube temperature of the indoor heat exchanger is <54°C and lasts for 30 seconds, and the difference between the tube temperature of the indoor heat exchanger and the temperature of the indoor heat exchanger is ≤ the third preset temperature value, it is considered that the indoor heat exchanger reaches the defrosting condition.

[0046] In step S220, whether the outdoor heat exchanger reaches the defrosting condition is determined according to the tube temperature of the outdoor heat exchanger and the outdoor environment temperature.

[0047] In some embodiments, in step S220, the specific process of determining whether the outdoor heat exchanger reaches the defrosting condition according to the tube temperature of the outdoor heat exchanger and the outdoor environment temperature includes steps S410 to S430.

[0048] In step S410, according to the size of the outdoor environment temperature, the target range of the tube temperature of the outdoor heat exchanger is determined; the target range includes a first target range, a second target range, a third target range, and a fourth target range.

[0049] In some embodiments, in step S410, the specific process of determining the target range of the tube temperature of the outdoor heat exchanger according to the magnitude of the outdoor ambient temperature comprises: if the outdoor ambient temperature is in a first temperature interval, determining that the target range of the tube temperature of the outdoor heat exchanger is the first target range; if the outdoor ambient temperature is in a second temperature interval, determining that the target range of the tube temperature of the outdoor heat exchanger is the second target range; if the outdoor ambient temperature is in a third temperature interval, determining that the target range of the tube temperature of the outdoor heat exchanger is the third target range; the upper limit value of the third target range is the difference between the outdoor ambient temperature and a fifth preset temperature value; if the outdoor ambient temperature is in a fourth temperature interval, determining that the target range of the tube temperature of the outdoor heat exchanger is the fourth target range; the upper limit value of the fourth target range is the difference between the outdoor ambient temperature and a sixth preset temperature value; the first temperature interval > the second temperature interval > the third temperature interval > the fourth temperature interval, and the first target range > the second target range; the fifth preset temperature value > the sixth preset temperature value.

[0050] Specifically, the lower the tube temperature of the outdoor heat exchanger, the easier it is to frost. Therefore, when the tube temperature of the outdoor heat exchanger is in the target range, it is considered that the outdoor heat exchanger needs to be defrosted. The magnitude of the target range is determined according to the magnitude of the outdoor ambient temperature. The first temperature interval can be set as 0-10℃, the second temperature interval can be set as -5-0℃, the third temperature interval can be set as -10--5℃, and the fourth temperature interval can be set as <-10℃. The first target range can be set as ≤-7℃, and the second target range can be set as ≤-11℃. The third target range can be set as ≤ the outdoor ambient temperature-6℃, and the fourth target range can be set as ≤ the outdoor ambient temperature-5℃. For example, when the outdoor ambient temperature is 5℃, the target range of the tube temperature of the outdoor heat exchanger is ≤-7℃, and when the outdoor ambient temperature is -7℃, the target range of the tube temperature of the outdoor heat exchanger is ≤-7℃-6℃. In order to make the judgment more accurate, the temperature range can be appropriately increased. For example, the increased temperature interval is ≥10℃, and the corresponding target range is ≤-5℃, that is, if the outdoor ambient temperature is ≥10℃, the target range of the tube temperature of the outdoor heat exchanger is ≤-5℃.

[0051] In step S420, it is determined whether the tube temperature of the outdoor heat exchanger is in the target range, and whether the temperature drop of the tube temperature of the outdoor heat exchanger is greater than or equal to the fourth preset temperature value and lasts for the third time.

[0052] In step S430, if the tube temperature of the outdoor heat exchanger is in the target range, and the temperature drop of the tube temperature of the outdoor heat exchanger is greater than or equal to the fourth preset temperature value and lasts for the third time, it is determined that the outdoor heat exchanger reaches the defrosting condition.

[0053] The pipe temperature of the outdoor heat exchanger being in the target range indicates that the outdoor heat exchanger can have frost. To avoid the influence of sudden fluctuations in the outdoor environment on the accuracy of the judgment, the present scheme combines the temperature drop of the pipe temperature of the outdoor heat exchanger to determine whether the outdoor heat exchanger reaches the defrosting condition, thereby improving the accuracy of the air conditioner entering the defrosting. The third time can be set to 2 min, and the fourth preset temperature value can be set to 2℃. In the case where the pipe temperature of the outdoor heat exchanger is in the target range, if the temperature drop of the pipe temperature of the outdoor heat exchanger is ≥2℃ for 2 min continuously, it is determined that the outdoor heat exchanger reaches the defrosting condition.

[0054] In some embodiments, the process of determining whether the outdoor heat exchanger reaches the defrosting condition further includes: if the outdoor environment temperature is in the third temperature interval or the fourth temperature interval, determining whether the cumulative running time length is greater than or equal to the first preset time value; and if the cumulative running time length is greater than or equal to the first preset time value, determining that the outdoor heat exchanger reaches the defrosting condition.

[0055] In the process of determining whether the outdoor heat exchanger reaches the defrosting condition, when the outdoor environment temperature is too low, the outdoor heat exchanger is very easy to frost, at this time, as long as the cumulative running time of the compressor exceeds the first preset time value, it is considered that the outdoor heat exchanger reaches the defrosting condition. The first preset time value can be set to 2h. Thus, by simplifying the judgment process, defrosting is performed faster in the extreme case of too low outdoor temperature, thereby ensuring the performance of the air conditioner.

[0056] Step S230, determining whether the compressor reaches the defrosting condition according to the continuous running time length and the cumulative running time length.

[0057] In some embodiments, the specific process of determining whether the compressor reaches the defrosting condition according to the continuous running time length and the cumulative running time length in step S230 includes: determining whether the continuous running time length is greater than or equal to the second preset time value; and determining whether the cumulative running time length is greater than or equal to the third preset time value; if the continuous running time length is greater than or equal to the second preset time value, and the cumulative running time length is greater than or equal to the third preset time value, it is determined that the compressor reaches the defrosting condition.

[0058] In the heating mode, the pipe temperature of the outdoor heat exchanger is in a lower state for a long time, and the outdoor heat exchanger is more likely to frost after a long time of running in this state, so the running time of the compressor can be used to determine whether to defrost. The second preset time value can be set to 170s, and the third preset time value can be set to 44min. When the continuous running time of the compressor is ≥170s, and the cumulative running time of the compressor is ≥44min, it is determined that the compressor reaches the defrosting condition, and the air conditioner starts defrosting.

[0059] Step S240, if the indoor heat exchanger and the outdoor heat exchanger reach the defrosting condition, or the compressor reaches the defrosting condition, it is determined to defrost.

[0060] By judging whether to defrost according to the temperature and time length data of the indoor heat exchanger, the outdoor heat exchanger and the compressor, the accuracy of defrosting judgment is improved, the operation performance of the air conditioner is ensured, and the user experience is affected by the frequent defrosting of the air conditioner and the indoor comfort is reduced by the untimely defrosting.

[0061] At step S130, if it is determined to defrost, the air conditioner is switched to a refrigeration mode or a dehumidification mode, the indoor heat exchanger is evaporator, the outdoor heat exchanger is condenser, and then the opening and closing of the first and second electric heating components, the working state of the first and second indoor fans, and the opening of the first and second electronic expansion valves are controlled according to the indoor environment temperature.

[0062] In some embodiments, in step S130, the specific process of controlling the opening and closing of the first and second electric heating components, the working state of the first and second indoor fans, and the opening of the first and second electronic expansion valves according to the indoor environment temperature includes steps S510 to S530.

[0063] Step S510, the defrosting time length of the previous defrosting and the defrosting time length of the second previous defrosting of the air conditioner are obtained, which are recorded as the first defrosting time length and the second defrosting time length respectively.

[0064] Step S520, it is judged whether the temperature drop of the indoor environment temperature is greater than or equal to the seventh preset temperature value, and whether the first defrosting time length is greater than the second defrosting time length, and whether the difference between the first defrosting time length and the second defrosting time length is greater than a preset difference value.

[0065] Step S530, if the temperature drop of the indoor environment temperature is greater than or equal to the seventh preset temperature value, the first electric heating component is turned on, the first indoor fan is turned on and rotates forward, the first electronic expansion valve is closed, and the opening of the second electronic expansion valve is increased according to the preset opening; at the same time, if the first defrosting time length is greater than the second defrosting time length, and the difference between the first defrosting time length and the second defrosting time length is greater than a preset difference value, the second electric heating component is turned on, the second indoor fan is turned on and reverses; or, the second electric heating component is turned on, the second indoor fan is turned on and reverses, the second electronic expansion valve is closed, and the opening of the first electronic expansion valve is increased according to the preset opening; at the same time, if the first defrosting time length is greater than the second defrosting time length, and the difference between the first defrosting time length and the second defrosting time length is greater than a preset difference value, the first electric heating component is turned on, the first indoor fan is turned on and reverses.

[0066] After entering defrost mode, the air conditioner switches to cooling mode. The air guide plates at both air outlets of the indoor unit are closed, and both indoor fans stop running. Defrosting occurs using residual heat from the indoor heat exchanger and heat within the air duct. The system then determines whether the drop in indoor ambient temperature is greater than or equal to a seventh preset temperature value, which can be set to 3°C. The drop in indoor ambient temperature is the difference between the indoor ambient temperature at the time the air conditioner began defrosting and the current indoor ambient temperature. If the drop in indoor ambient temperature is ≥3°C, heating is required to ensure indoor comfort during the defrost process. At this point, any one of the electric heating components is turned on, the corresponding air guide plates are opened, and the corresponding indoor fans are turned on at a low speed and in forward rotation, allowing the electric heating component to heat the room. Simultaneously, the corresponding electronic expansion valve is closed, and the opening of the other electronic expansion valve is increased by a preset opening, which can be set to 100°C. This prevents low-temperature refrigerant from flowing through the indoor heat exchanger corresponding to the active electric heating component, thus preventing defrost time from being affected by the lack of refrigerant heat exchange in that area.

[0067] During the defrost process, it is determined whether the defrost time of the previous defrost has increased compared to the defrost time before that. If the defrost time has increased, it is considered that the frost on the air conditioner is getting thicker, defrosting is becoming more difficult, and the defrost time is long, affecting indoor comfort. Specifically, the preset difference can be set to 10% of the second defrost time. That is, if the first defrost time is greater than the second defrost time, and the first defrost time - the second defrost time is greater than or equal to the second defrost time * 10%, then defrost is considered difficult. At this time, if the refrigerant is flowing through the second part of the indoor heat exchanger, the second electric heating component is turned on, and the second internal fan is turned on at a low wind speed and reversed, so that the second electric heating component provides heat to the second part of the indoor heat exchanger, increasing the superheat, so that more heat is transferred to the outdoor heat exchanger through the refrigerant to defrost faster, improve defrost efficiency, shorten the defrost time, and avoid excessive defrost time. Similarly, the corresponding control when the refrigerant flows through the first part of the indoor heat exchanger can be derived.

[0068] When the air conditioner has been in defrosting mode for 12 minutes or the tube temperature of the outdoor heat exchanger is ≥10°C, the defrosting mode ends and the air conditioner switches back to heating mode.

[0069] By dividing the indoor heat exchanger into two parts and installing an electric heating element between the indoor heat exchanger and the indoor fan, the operating state of the indoor fan, the indoor heat exchanger, and the electric heating element are adjusted based on the indoor temperature changes during defrosting and the previous defrost duration. This prevents excessive defrosting time and rapid indoor temperature drops, ensuring a comfortable indoor environment. At the same time, the refrigerant transfers the heat generated by the electric heating element to the outdoor heat exchanger for thorough defrosting, avoiding frequent defrosting that affects the user experience.

[0070] According to the technical scheme of the embodiment, the indoor heat exchanger is divided into a first part and a second part, the first part is provided with a first electric heating component and a first internal fan, the second part is provided with a second electric heating component and a second internal fan, the first part is provided with a first electronic expansion valve between the first part and the outdoor heat exchanger of the air conditioner, and the second part is provided with a second electronic expansion valve between the second part and the outdoor heat exchanger. In the heating mode, whether defrosting is performed is determined according to the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature and the running time length of the compressor. If it is determined that defrosting is performed, the air conditioner is controlled to switch to the cooling mode. Then, the opening and closing of the first electric heating component and the second electric heating component, the working state of the first internal fan and the second internal fan, and the opening degree of the first electronic expansion valve and the second electronic expansion valve are controlled according to the indoor environment temperature. Whether defrosting is performed is determined according to the tube temperature of the heat exchanger, the indoor and outdoor temperatures and the running time length of the compressor, so that the accuracy of defrosting determination is improved. The electric heating component is used to provide heat for the indoor heating and defrosting in the defrosting process, so that the defrosting efficiency is improved, the defrosting time is shortened, the problem of long defrosting time and incomplete defrosting is avoided, and the indoor environment comfort is ensured.

[0071] According to the embodiment of the present application, a control device of an air conditioner corresponding to the control method of the air conditioner is also provided. The indoor unit of the air conditioner has an indoor heat exchanger, a first internal fan, a second internal fan, a first electric heating component, a second electric heating component, a first electronic expansion valve and a second electronic expansion valve. The indoor heat exchanger is divided into a first part and a second part. The first electric heating component is arranged at the first part, and the second electric heating component is arranged at the second part. The first electronic expansion valve is arranged between the first part and the outdoor heat exchanger of the air conditioner, and the second electronic expansion valve is arranged between the second part and the outdoor heat exchanger. Specifically, one end of the first part and one end of the outdoor heat exchanger of the air conditioner are connected through the first electronic expansion valve, and one end of the second part and one end of the outdoor heat exchanger are connected through the second electronic expansion valve. The other end of the first part and the other end of the second part are respectively connected to the same valve port of a four-way valve of the air conditioner, and the other end of the outdoor heat exchanger is connected to the other valve port of the four-way valve. The other two valve ports of the four-way valve are respectively connected to the suction port and the exhaust port of the compressor of the air conditioner. By changing the connection relationship between the valve ports of the four-way valve, the air conditioner can work in the heating mode or the cooling mode. In the heating mode and the cooling mode, the first electronic expansion valve and the second electronic expansion valve both play a throttling role.

[0072] The first inner fan corresponds to the first part, and the second inner fan corresponds to the second part. The indoor unit of the air conditioner has a first air outlet and a second air outlet. When the first inner fan is running in the forward direction, it can discharge the heat-exchanged air from the first air outlet. When the second inner fan is running in the forward direction, it can discharge the heat-exchanged air from the second air outlet. The specific structure of the air conditioner is as shown in Figure 3 and Figure 4 The outdoor unit of the air conditioner includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, and an outer fan 4. The indoor unit includes a first electronic expansion valve 5, a second electronic expansion valve 6, an indoor heat exchanger 7, a second inner fan 8, a first inner fan 9, a second electric heating component 10, and a first electric heating component 11.

[0073] The indoor heat exchanger 7 is divided into an indoor heat exchanger first part 71 and an indoor heat exchanger second part 72. The first electronic expansion valve 5 can adjust the flow of refrigerant flowing into the indoor heat exchanger first part 71 from this side. At the position of the indoor heat exchanger first part 71, the first inner fan 9 and the first electric heating component 11 are arranged. The first electric heating component 11 is arranged between the first inner fan 9 and the indoor heat exchanger first part 71. When the first inner fan 9 is working normally, it can make the indoor air exchange heat with the indoor heat exchanger first part 71 or the first electric heating component 11. The second electronic expansion valve 6 can adjust the flow of refrigerant flowing into the indoor heat exchanger second part 72 from this side. At the position of the indoor heat exchanger second part 72, the second inner fan 8 and the second electric heating component 10 are arranged. The second electric heating component 10 is arranged between the second inner fan 8 and the indoor heat exchanger second part 72. When the second inner fan 8 is working normally, it can make the indoor air exchange heat with the indoor heat exchanger second part 72 or the second electric heating component 10. Figure 4 In the embodiment, the indoor heat exchanger first part 71 and the indoor heat exchanger second part 72 share a refrigerant outlet. When the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger, the refrigerant exchanges heat in the indoor heat exchanger first part 71 and the indoor heat exchanger second part 72 and then flows out from the same outlet.

[0074] Referring to Figure 2 The structure diagram of an embodiment of the device of the present 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 tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature, and the running time of the compressor of the air conditioner during the process of the air conditioner running in the heating mode. The specific functions and processes of the acquisition unit 102 are described in step S110.

[0076] In the heating mode, the first part and the second part of the indoor heat exchanger both perform heat exchange, the control strategies of the first electronic expansion valve and the second electronic expansion valve are the same, and there is no temperature difference between the first part and the second part, so any one of the temperature of the middle part of the indoor heat exchanger, the pipe temperature of the first part and the pipe temperature of the second part can be taken as the pipe temperature of the indoor heat exchanger. At the same time, the temperature of the middle part of the outdoor heat exchanger can be taken as the pipe temperature of the outdoor heat exchanger. The indoor environment temperature can be detected by the temperature sensor arranged at the air inlet of the indoor unit.

[0077] The control unit 104 is configured to determine whether to defrost according to the pipe temperature of the indoor heat exchanger, the pipe temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature and the running time length of the compressor. The specific functions and processes of the control unit 104 are described in step S120.

[0078] In some embodiments, the running time length of the compressor includes a continuous running time length and an accumulated running time length. The continuous running time length of the compressor is counted from the time when the pipe temperature of the outdoor heat exchanger is detected to be ≤3℃ for 3s continuously. During the counting process, if the pipe temperature of the outdoor heat exchanger is detected to be >3℃ for 3s continuously, the counting is stopped, and the continuous running time length is cleared. The accumulated running time length is counted from the time when the compressor is started. When the compressor stops running for 2h, or the air conditioner switches to the cooling mode or the dehumidifying mode, the accumulated running time length is cleared.

[0079] In some embodiments, the control unit 104 determines whether to defrost according to the pipe temperature of the indoor heat exchanger, the pipe temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature and the running time length of the compressor, including:

[0080] The control unit 104 is specifically further configured to determine whether the indoor heat exchanger reaches the defrosting condition according to the pipe temperature of the indoor heat exchanger and the indoor environment temperature. The specific functions and processes of the control unit 104 are described in step S210.

[0081] In some embodiments, the control unit 104 determines whether the indoor heat exchanger reaches the defrosting condition according to the pipe temperature of the indoor heat exchanger and the indoor environment temperature, including:

[0082] The control unit 104 is specifically further configured to determine whether the temperature drop of the pipe temperature of the indoor heat exchanger is greater than or equal to a first preset temperature value every interval of a first time, determine whether the pipe temperature of the indoor heat exchanger is less than a second preset temperature value and lasts for a second time, and determine whether the difference between the pipe temperature of the indoor heat exchanger and the indoor environment temperature is less than or equal to a third preset temperature value. The specific functions and processes of the control unit 104 are described in step S310.

[0083] The control unit 104 is further configured to determine that the indoor heat exchanger reaches the defrosting condition if the following conditions are met simultaneously for a preset number of times in succession: the temperature drop of the tube temperature of the indoor heat exchanger is greater than or equal to a first preset temperature value, the tube temperature of the indoor heat exchanger is less than a second preset temperature value for a second time, and the difference between the tube temperature of the indoor heat exchanger and the indoor ambient temperature is less than or equal to a third preset temperature value. The specific functions and processes of the control unit 104 are described with reference to step S320.

[0084] After the air conditioner is started and the compressor is continuously operated for 10 minutes, it is determined whether the indoor heat exchanger reaches the defrosting condition. The first time can be set to 6 minutes, the second time can be set to 30 seconds, the first preset temperature value can be set to 2°C, and the second preset temperature value can be set to 54°C. The control strategies of the first indoor fan and the second indoor fan in the heating mode are the same. The third preset temperature value is related to the speed of the indoor fan. The greater the speed, the smaller the third preset temperature value. For example, when the indoor fan is in the low wind gear, it is set to 20°C, when the indoor fan is in the medium wind gear, it is set to 18°C, when the indoor fan is in the high wind gear, it is set to 17°C, and when the indoor fan is in the super high wind gear, it is set to 16°C. The temperature drop of the tube temperature of the indoor heat exchanger is obtained by subtracting the tube temperature at the end of the first time from the tube temperature at the beginning of the first time. Therefore, when determining whether the indoor heat exchanger reaches the defrosting condition, if the following conditions are met simultaneously: the temperature drop of the tube temperature of the indoor heat exchanger is ≥2°C within 6 minutes and occurs continuously for 2 times, the tube temperature of the indoor heat exchanger is <54°C for 30 seconds, and the difference between the tube temperature of the indoor heat exchanger and the indoor heat exchanger temperature is ≤ the third preset temperature value, it is considered that the indoor heat exchanger reaches the defrosting condition.

[0085] The control unit 104 is further configured to determine whether the outdoor heat exchanger reaches the defrosting condition according to the tube temperature of the outdoor heat exchanger and the outdoor ambient temperature. The specific functions and processes of the control unit 104 are described with reference to step S220.

[0086] In some embodiments, the control unit 104 determines whether the outdoor heat exchanger reaches the defrosting condition according to the tube temperature of the outdoor heat exchanger and the outdoor ambient temperature, including:

[0087] The control unit 104 is further configured to determine a target range of the tube temperature of the outdoor heat exchanger according to the size of the outdoor ambient temperature; the target range includes a first target range, a second target range, a third target range, and a fourth target range. The specific functions and processes of the control unit 104 are described with reference to step S410.

[0088] In some embodiments, the control unit 104 determines the target range of the tube temperature of the outdoor heat exchanger according to the magnitude of the outdoor ambient temperature, including: if the outdoor ambient temperature is in a first temperature interval, determining the target range of the tube temperature of the outdoor heat exchanger as the first target range; if the outdoor ambient temperature is in a second temperature interval, determining the target range of the tube temperature of the outdoor heat exchanger as the second target range; if the outdoor ambient temperature is in a third temperature interval, determining the target range of the tube temperature of the outdoor heat exchanger as the third target range; the upper limit of the third target range is the difference between the outdoor ambient temperature and a fifth preset temperature value; if the outdoor ambient temperature is in a fourth temperature interval, determining the target range of the tube temperature of the outdoor heat exchanger as the fourth target range; the upper limit of the fourth target range is the difference between the outdoor ambient temperature and a sixth preset temperature value; the first temperature interval > the second temperature interval > the third temperature interval > the fourth temperature interval, and the first target range > the second target range; the fifth preset temperature value > the sixth preset temperature value.

[0089] Specifically, the lower the tube temperature of the outdoor heat exchanger, the easier it is to frost. Therefore, when the tube temperature of the outdoor heat exchanger is in the target range, it is considered that the outdoor heat exchanger needs to be defrosted. The magnitude of the target range is determined according to the magnitude of the outdoor ambient temperature. The first temperature interval can be set to 0-10℃, the second temperature interval can be set to -5-0℃, the third temperature interval can be set to -10--5℃, and the fourth temperature interval can be set to <-10℃. The first target range can be set to ≤-7℃, and the second target range can be set to ≤-11℃. The third target range can be set to ≤ the outdoor ambient temperature-6℃, and the fourth target range can be set to ≤ the outdoor ambient temperature-5℃. For example, when the outdoor ambient temperature is 5℃, the target range of the tube temperature of the outdoor heat exchanger is ≤-7℃, and when the outdoor ambient temperature is -7℃, the target range of the tube temperature of the outdoor heat exchanger is ≤-7℃-6℃. In order to make the judgment more accurate, the temperature range can be appropriately increased. For example, the increased temperature interval is ≥10℃, and the corresponding target range is ≤-5℃, i.e., if the outdoor ambient temperature is ≥10℃, the target range of the tube temperature of the outdoor heat exchanger is ≤-5℃.

[0090] The control unit 104 is specifically further configured to determine whether the tube temperature of the outdoor heat exchanger is in the target range, and determine whether the temperature drop of the tube temperature of the outdoor heat exchanger is greater than or equal to a fourth preset temperature value and lasts for a third time. For specific functions and processing of the control unit 104, see step S420.

[0091] The control unit 104 is further configured to determine that the outdoor heat exchanger has met the defrost condition if the tube temperature of the outdoor heat exchanger is within the target range and the temperature drop of the tube temperature of the outdoor heat exchanger is greater than or equal to a fourth preset temperature value and lasts for a third time. The specific functions and processing of the control unit 104 are described in step S430.

[0092] If the outdoor heat exchanger's pipe temperature is within the target range, it may be frosted. To prevent sudden fluctuations in the outdoor environment from affecting the accuracy of the judgment, this solution combines the outdoor heat exchanger's pipe temperature drop to determine whether the outdoor heat exchanger has met the defrost conditions, thereby improving the accuracy of the air conditioner's defrost entry. The third time can be set to 2 minutes, and the fourth preset temperature value can be set to 2°C. If the outdoor heat exchanger's pipe temperature is within the target range and the pipe temperature drop exceeds 2°C for two consecutive minutes, the outdoor heat exchanger is determined to have met the defrost conditions.

[0093] In some embodiments, the control unit 104 determines whether the outdoor heat exchanger meets the defrost condition, and also includes: if the outdoor ambient temperature is in the third temperature range or the fourth temperature range, determining whether the cumulative operating time is greater than or equal to the first preset time value; if the cumulative operating time is greater than or equal to the first preset time value, determining that the outdoor heat exchanger meets the defrost condition.

[0094] When determining whether the outdoor heat exchanger has reached defrost conditions, if the outdoor ambient temperature is too low, the outdoor heat exchanger is very prone to frost. In this case, as long as the cumulative compressor operating time exceeds a first preset time value, the outdoor heat exchanger is considered to have reached defrost conditions. The first preset time value can be set to 2 hours. This simplifies the judgment process, allowing for faster defrosting in extreme conditions of extremely low outdoor temperatures, thereby ensuring air conditioning performance.

[0095] The control unit 104 is further configured to determine whether the compressor has reached a defrosting condition based on the continuous operation time and the accumulated operation time. Specific functions and processing of the control unit 104 are shown in step S230.

[0096] In some embodiments, the control unit 104 determines whether the compressor reaches the defrost condition based on the continuous running time and the cumulative running time, including: judging whether the continuous running time is greater than or equal to a second preset time value; and judging whether the cumulative running time is greater than or equal to a third preset time value; if the continuous running time is greater than or equal to the second preset time value, and the cumulative running time is greater than or equal to the third preset time value, it is determined that the compressor reaches the defrost condition.

[0097] In the heating mode, the tube temperature of the outdoor heat exchanger is in a low state for a long time, and the outdoor heat exchanger is more likely to frost in this state after a long time of operation. Therefore, whether defrosting is performed can be determined according to the running time of the compressor. The second preset time value can be set to 170 s, and the third preset time value can be set to 44 min. When the continuous running time of the compressor is greater than or equal to 170 s, and the cumulative running time of the compressor is greater than or equal to 44 min, it is determined that the compressor reaches the defrosting condition, and the air conditioner starts defrosting.

[0098] The control unit 104 is specifically further configured to determine to defrost if the indoor heat exchanger and the outdoor heat exchanger both reach the defrosting condition, or the compressor reaches the defrosting condition. For specific functions and processes of the control unit 104, see step S240.

[0099] By determining whether to defrost according to the temperature and time data of the indoor heat exchanger, the outdoor heat exchanger, and the compressor, the accuracy of defrosting determination is improved, the operation performance of the air conditioner is ensured, and the user experience is affected by the frequent defrosting of the air conditioner and the indoor comfort is reduced by the untimely defrosting.

[0100] The control unit 104 is further configured to control the air conditioner to switch to the cooling mode if it is determined to defrost, and then control the opening and closing of the first and second electric heating components, the working state of the first and second indoor fans, and the opening of the first and second electronic expansion valves according to the indoor environment temperature. For specific functions and processes of the control unit 104, see step S130.

[0101] In some embodiments, the control unit 104 controls the opening and closing of the first and second electric heating components, the working state of the first and second indoor fans, and the opening of the first and second electronic expansion valves according to the indoor environment temperature, including:

[0102] The control unit 104 is specifically further configured to obtain the defrosting time of the previous defrosting and the defrosting time of the second previous defrosting of the air conditioner, respectively denoted as the first defrosting time and the second defrosting time. For specific functions and processes of the control unit 104, see step S510.

[0103] The control unit 104 is specifically further configured to determine whether the temperature drop of the indoor environment temperature is greater than or equal to a seventh preset temperature value, and determine whether the first defrosting time is greater than the second defrosting time, or whether the difference between the first defrosting time and the second defrosting time is greater than a preset difference value. For specific functions and processes of the control unit 104, see step S520.

[0104] The control unit 104 is further configured to, if the temperature drop of the indoor environment temperature is greater than or equal to a seventh preset temperature value, turn on the first electric heating component, turn on the first inner air fan and rotate it in a forward direction, turn off the first electronic expansion valve, and increase the opening degree of the second electronic expansion valve according to a preset opening degree. At the same time, if the first defrosting time is greater than the second defrosting time, and the difference between the first defrosting time and the second defrosting time is greater than a preset difference value, turn on the second electric heating component, turn on the second inner air fan and rotate it in a reverse direction; or, turn on the second electric heating component, turn on the second inner air fan and rotate it in a reverse direction, turn off the second electronic expansion valve, and increase the opening degree of the first electronic expansion valve according to a preset opening degree. At the same time, if the first defrosting time is greater than the second defrosting time, and the difference between the first defrosting time and the second defrosting time is greater than a preset difference value, turn on the first electric heating component, turn on the first inner air fan and rotate it in a reverse direction. The specific functions and processes of the control unit 104 are described in step S530.

[0105] After entering the defrosting, the air conditioner switches to the refrigeration mode, the indoor unit two air outlet guide vane is in the closed state, two inner air fan stop running, at this time through the indoor heat exchanger in the residual heat and the heat in the air duct defrosting. After that, it is judged whether the temperature drop of the indoor environment temperature is greater than or equal to the seventh preset temperature value, which can be set to 3℃. The temperature drop of the indoor environment temperature is the difference between the indoor environment temperature when the air conditioner starts defrosting and the current time. If the temperature drop of the indoor environment temperature is greater than or equal to 3℃, the indoor heating is needed to ensure the comfort of the indoor during the defrosting. At this time, turn on any electric heating component, open the corresponding air deflector, and turn on the corresponding inner air fan at low wind speed and rotate it in a forward direction, so that the electric heating component supplies heat to the indoor. At the same time, turn off the corresponding electronic expansion valve, and increase the opening degree of the other electronic expansion valve according to a preset opening degree, which can be set to 100p, so that the low-temperature refrigerant does not flow through the indoor heat exchanger corresponding to the working electric heating component, and avoids affecting the defrosting time due to the lack of refrigerant heat exchange in this part.

[0106] In the defrosting process, it is simultaneously judged whether the defrosting time of the previous defrosting is increased compared with the defrosting time of the defrosting before the previous defrosting. If the defrosting time is increased, it is considered that the air conditioner frost is getting thicker and thicker, the defrosting is getting more and more difficult, and the defrosting time is long and affects the indoor comfort. Specifically, the preset difference can be set to 10% of the second defrosting time, that is, if the first defrosting time > the second defrosting time, and the first defrosting time-second defrosting time ≥ the second defrosting time*10%, it is considered that the defrosting is difficult. At this time, if the refrigerant flows through the second part of the indoor heat exchanger, the second electric heating part is started, the second indoor fan is started at a low wind speed, and is reversed, so that the second electric heating part provides heat for the second part of the indoor heat exchanger, improves the superheat degree, and makes more heat be transferred to the outdoor heat exchanger through the refrigerant to defrost faster, improve the defrosting efficiency, shorten the defrosting time, and avoid the defrosting time being too long. Similarly, the corresponding control when the refrigerant flows through the first part of the indoor heat exchanger can be obtained.

[0107] The air conditioner ends the defrosting when the time of the defrosting reaches 12 min or the pipe temperature of the outdoor heat exchanger is ≥10℃, and the air conditioner switches back to the heating mode.

[0108] By dividing the indoor heat exchanger into two parts, the electric heating part is arranged between the indoor heat exchanger and the indoor fan, the state of the indoor fan, the working state of the two parts of the indoor heat exchanger, and the working state of the electric heating part are adjusted according to the change of the indoor temperature during the defrosting of the air conditioner and the defrosting time before, to prevent the defrosting time being too long and the indoor temperature being too low, and to ensure the comfort of the indoor environment. At the same time, the heat generated by the electric heating part is transferred to the outdoor heat exchanger by the refrigerant to make the defrosting complete, and to avoid the air conditioner frequently defrosting and affecting the user experience.

[0109] 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, the description of the embodiment is not described in detail, and the related description in the foregoing embodiments can be referred to, and is not described here.

[0110] The technical solution of the present invention divides an indoor heat exchanger into a first part and a second part. The first part is provided with a first electric heating element and a first indoor fan, and the second part is provided with a second electric heating element and a second indoor fan. A first electronic expansion valve is provided between the first part and the outdoor heat exchanger, and a second electronic expansion valve is provided between the second part and the outdoor heat exchanger. In heating mode, whether to defrost is determined based on the indoor heat exchanger tube temperature, the outdoor heat exchanger tube temperature, the indoor ambient temperature, the outdoor ambient temperature, and the operating time of the compressor. If defrost is determined to be required, the air conditioner is controlled to switch to cooling mode. The first and second electric heating elements, the operating states of the first and second indoor fans, and the openings of the first and second electronic expansion valves are then controlled based on the indoor ambient temperature. By determining whether to defrost based on the heat exchanger tube temperature, the indoor and outdoor temperatures, and the operating time of the compressor, the accuracy of defrost determination is improved. During defrost, the electric heating element is used to provide heat for indoor heating and defrosting, thereby improving defrost efficiency, shortening defrost time, and avoiding excessive defrost time and incomplete defrost, thereby ensuring a comfortable indoor environment.

[0111] According to an embodiment of the present invention, an air conditioner corresponding to the air conditioner control device is also provided. The air conditioner may include: the air conditioner control device described above.

[0112] 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 any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0113] The technical solution of the present invention divides an indoor heat exchanger into a first part and a second part. The first part is provided with a first electric heating element and a first indoor fan, and the second part is provided with a second electric heating element and a second indoor fan. A first electronic expansion valve is provided between the first part and the outdoor heat exchanger, and a second electronic expansion valve is provided between the second part and the outdoor heat exchanger. In heating mode, whether to defrost is determined based on the indoor heat exchanger tube temperature, the outdoor heat exchanger tube temperature, the indoor ambient temperature, the outdoor ambient temperature, and the operating time of the compressor. If defrost is determined to be required, the air conditioner is controlled to switch to cooling mode. The first and second electric heating elements, the operating states of the first and second indoor fans, and the openings of the first and second electronic expansion valves are then controlled based on the indoor ambient temperature. By determining whether to defrost based on the heat exchanger tube temperature, the indoor and outdoor temperatures, and the operating time of the compressor, the accuracy of defrost determination is improved. During defrost, the electric heating element is used to provide heat for indoor heating and defrosting, thereby improving defrost efficiency, shortening defrost time, and avoiding excessive defrost time and incomplete defrost, thereby ensuring a comfortable indoor environment.

[0114] According to an 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 the device where the storage medium is located performs the control method of the air conditioner described above when the program is executed.

[0115] Since the processing and functions realized by the storage medium of the present embodiment are basically corresponding to the embodiments, principles and examples of the foregoing method, the description of the present embodiment does not describe the details which can be found in the foregoing embodiments, and will not be repeated here.

[0116] The technical scheme of the present application divides the indoor heat exchanger into a first part and a second part, the first part is provided with a first electric heating component and a first inner fan, the second part is provided with a second electric heating component and a second inner fan, the first part is provided with a first electronic expansion valve between the first part and the outdoor heat exchanger, and the second part is provided with a second electronic expansion valve between the second part and the outdoor heat exchanger; in the heating mode, whether to defrost is determined according to the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature and the running time of the compressor, if it is determined to defrost, the air conditioner is switched to the cooling mode, and then the opening and closing of the first electric heating component and the second electric heating component, the working state of the first inner fan and the second inner fan, and the opening degree of the first electronic expansion valve and the second electronic expansion valve are controlled according to the indoor environment temperature. By determining whether to defrost according to the heat exchanger tube temperature, the indoor and outdoor temperatures and the running time of the compressor, the accuracy of defrosting is improved, the electric heating component is used to provide heat for the indoor and defrosting when defrosting, the defrosting efficiency is improved, the defrosting time is shortened, the problem of long defrosting time and incomplete defrosting is avoided, and the indoor environment comfort is ensured.

[0117] According to an 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.

[0118] Since the processing and functions realized by the computer program product of the present embodiment are basically corresponding to the embodiments, principles and examples of the foregoing method, the description of the present embodiment does not describe the details which can be found in the foregoing embodiments, and will not be repeated here.

[0119] The technical scheme of the present application divides the indoor heat exchanger into a first part and a second part, the first part is provided with a first electric heating component and a first internal fan, the second part is provided with a second electric heating component and a second internal fan, a first electronic expansion valve is arranged between the first part and the outdoor heat exchanger, and a second electronic expansion valve is arranged between the second part and the outdoor heat exchanger; in the heating mode, whether defrosting is performed is determined according to the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature and the running time length of the compressor, if it is determined that defrosting is performed, the air conditioner is controlled to switch to the cooling mode, and then the opening and closing of the first electric heating component and the second electric heating component, the working state of the first internal fan and the second internal fan, and the opening degree of the first electronic expansion valve and the second electronic expansion valve are controlled according to the indoor environment temperature. By determining whether defrosting is performed according to the heat exchanger tube temperature, the indoor and outdoor temperatures and the running time length of the compressor, the accuracy of defrosting determination is improved, the electric heating component is used to provide heat for the indoor and defrosting when defrosting, the defrosting efficiency is improved, the defrosting time is shortened, the situation that the defrosting time is too long and the defrosting is not complete is avoided, and the indoor environment comfort is ensured.

[0120] In summary, those skilled in the art can easily understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0121] 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 indoor unit of the air conditioner has an indoor heat exchanger, a first indoor fan, a second indoor fan, a first electric heating component, a second electric heating component, a first electronic expansion valve, and a second electronic expansion valve; the indoor heat exchanger is divided into a first part and a second part; the first electric heating component is arranged at the first part, and the second electric heating component is arranged at the second part; the first electronic expansion valve is arranged between the first part and an outdoor heat exchanger of the air conditioner, and the second electronic expansion valve is arranged between the second part and the outdoor heat exchanger; The first indoor fan corresponds to the first part, and the second indoor fan corresponds to the second part; The method comprises: During the process of the air conditioner running in the heating mode, the pipe temperature of the indoor heat exchanger, the pipe temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature, and the running time length of the compressor of the air conditioner are acquired; According to the pipe temperature of the indoor heat exchanger, the pipe temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature, and the running time length of the compressor, it is determined whether to defrost; If it is determined to defrost, the air conditioner is controlled to switch to the refrigeration mode, and then the opening and closing of the first electric heating component and the second electric heating component, the working state of the first indoor fan and the second indoor fan, and the opening degree of the first electronic expansion valve and the second electronic expansion valve are controlled according to the indoor environment temperature; The control of the opening and closing of the first electric heating component and the second electric heating component, the working state of the first indoor fan and the second indoor fan, and the opening degree of the first electronic expansion valve and the second electronic expansion valve according to the indoor environment temperature comprises: The defrosting time length of the air conditioner last time and the defrosting time length of the air conditioner two times ago are acquired, which are recorded as a first defrosting time length and a second defrosting time length respectively; It is determined whether the temperature drop of the indoor environment temperature is greater than or equal to a seventh preset temperature value, and whether the first defrosting time length is greater than the second defrosting time length, and whether the difference between the first defrosting time length and the second defrosting time length is greater than a preset difference value; If the temperature drop of the indoor environment temperature is greater than or equal to the seventh preset temperature value, the first electric heating component is turned on, the first indoor fan is turned on and rotates forward, the first electronic expansion valve is turned off, and the opening degree of the second electronic expansion valve is increased according to a preset opening degree; at the same time, if the first defrosting time length is greater than the second defrosting time length, and the difference between the first defrosting time length and the second defrosting time length is greater than the preset difference value, the second electric heating component is turned on, the second indoor fan is turned on and rotates reversely, and the second electronic expansion valve is turned off. The running time length of the compressor comprises a continuous running time length and a cumulative running time length.

2. The control method of the air conditioner according to claim 1, characterized by, ​ According to the pipe temperature of the indoor heat exchanger, the pipe temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature, and the running time length of the compressor, it is determined whether to defrost, comprising: According to the pipe temperature of the indoor heat exchanger and the indoor environment temperature, it is determined whether the indoor heat exchanger reaches a defrost condition; According to the pipe temperature of the outdoor heat exchanger and the outdoor environment temperature, it is determined whether the outdoor heat exchanger reaches a defrost condition; According to the continuous running time length and the cumulative running time length, it is determined whether the compressor reaches a defrost condition; If the indoor heat exchanger and the outdoor heat exchanger both reach a defrost condition, or the compressor reaches a defrost condition, it is determined to defrost.

3. The control method of the air conditioner according to claim 2, characterized by, According to the pipe temperature of the indoor heat exchanger and the indoor environment temperature, it is determined whether the indoor heat exchanger reaches a defrost condition, comprising: Every interval of a first time, it is judged whether the temperature drop of the pipe temperature of the indoor heat exchanger is greater than or equal to a first preset temperature value; at the same time, it is judged whether the pipe temperature of the indoor heat exchanger is less than a second preset temperature value and lasts for a second time; and it is judged whether the difference between the pipe temperature of the indoor heat exchanger and the indoor environment temperature is less than or equal to a third preset temperature value; If the temperature drop of the pipe temperature of the indoor heat exchanger is greater than or equal to the first preset temperature value, the pipe temperature of the indoor heat exchanger is less than the second preset temperature value and lasts for the second time, and the difference between the pipe temperature of the indoor heat exchanger and the indoor environment temperature is less than or equal to the third preset temperature value, all of which are satisfied for a continuous preset number of times, it is determined that the indoor heat exchanger reaches a defrost condition.

4. The control method of the air conditioner according to claim 2, characterized by, According to the pipe temperature of the outdoor heat exchanger and the outdoor environment temperature, it is determined whether the outdoor heat exchanger reaches a defrost condition, comprising: According to the size of the outdoor environment temperature, a target range of the pipe temperature of the outdoor heat exchanger is determined; the target range includes a first target range, a second target range, a third target range, and a fourth target range; It is judged whether the pipe temperature of the outdoor heat exchanger is in the target range, and whether the temperature drop of the pipe temperature of the outdoor heat exchanger is greater than or equal to a fourth preset temperature value and lasts for a third time; If the pipe temperature of the outdoor heat exchanger is in the target range, and the temperature drop of the pipe temperature of the outdoor heat exchanger is greater than or equal to the fourth preset temperature value and lasts for the third time, it is determined that the outdoor heat exchanger reaches a defrost condition; According to the size of the outdoor environment temperature, a target range of the pipe temperature of the outdoor heat exchanger is determined, comprising: If the outdoor environment temperature is in a first temperature interval, it is determined that the target range of the pipe temperature of the outdoor heat exchanger is the first target range; If the outdoor environment temperature is in a second temperature interval, it is determined that the target range of the pipe temperature of the outdoor heat exchanger is the second target range; If the outdoor environment temperature is in a third temperature interval, it is determined that the target range of the pipe temperature of the outdoor heat exchanger is the third target range; the upper limit value of the third target range is the difference between the outdoor environment temperature and a fifth preset temperature value; If the outdoor environment temperature is in a fourth temperature interval, a target range of the tube temperature of the outdoor heat exchanger is determined as a fourth target range; an upper limit value of the fourth target range is a difference between the outdoor environment temperature and a sixth preset temperature value; The first temperature interval > the second temperature interval > the third temperature interval > the fourth temperature interval, and the first target range > the second target range; the fifth preset temperature value > the sixth preset temperature value.

5. The control method of the air conditioner according to claim 4, characterized by, Further comprising: If the outdoor environment temperature is in the third temperature interval or the fourth temperature interval, whether the cumulative running time length is greater than or equal to a first preset time value is determined; If the cumulative running time length is greater than or equal to the first preset time value, it is determined that the outdoor heat exchanger reaches the defrosting condition.

6. The control method of the air conditioner according to any one of claims 2 to 5, characterized by, According to the continuous running time length and the cumulative running time length, whether the compressor reaches the defrosting condition is determined, comprising: Whether the continuous running time length is greater than or equal to a second preset time value is determined; and whether the cumulative running time length is greater than or equal to a third preset time value is determined; If the continuous running time length is greater than or equal to the second preset time value, and the cumulative running time length is greater than or equal to the third preset time value, it is determined that the compressor reaches the defrosting condition.

7. A control device of an air conditioner, characterized by comprising: The indoor unit of the air conditioner has an indoor heat exchanger, a first indoor fan, a second indoor fan, a first electric heating component, a second electric heating component, a first electronic expansion valve, and a second electronic expansion valve; the indoor heat exchanger is divided into a first part and a second part; the first electric heating component is arranged at the first part, and the second electric heating component is arranged at the second part; the first electronic expansion valve is arranged between the first part and an outdoor heat exchanger of the air conditioner, and the second electronic expansion valve is arranged between the second part and the outdoor heat exchanger; The first indoor fan corresponds to the first part, and the second indoor fan corresponds to the second part; The device comprises: An acquisition unit is configured to acquire a tube temperature of the indoor heat exchanger, a tube temperature of the outdoor heat exchanger, an indoor environment temperature, an outdoor environment temperature, and a running time length of a compressor of the air conditioner during the air conditioner is running in a heating mode; A control unit is configured to determine whether to defrost according to the tube temperature of the indoor heat exchanger, the tube temperature of the outdoor heat exchanger, the indoor environment temperature, the outdoor environment temperature, and the running time length of the compressor; If it is determined to defrost, the control unit controls the air conditioner to switch to a cooling mode, and then controls opening and closing of the first electric heating component and the second electric heating component, working states of the first indoor fan and the second indoor fan, and opening degrees of the first electronic expansion valve and the second electronic expansion valve according to the indoor environment temperature; The control unit controls the opening and closing of the first electric heating component and the second electric heating component, the working states of the first indoor fan and the second indoor fan, and the opening degrees of the first electronic expansion valve and the second electronic expansion valve according to the indoor environment temperature, comprising: acquire a defrosting time length of a previous defrosting of the air conditioner and a defrosting time length of a previous defrosting before the previous defrosting, and record the defrosting time length of the previous defrosting as a first defrosting time length and the defrosting time length of the previous defrosting before the previous defrosting as a second defrosting time length; determine whether a temperature drop of the indoor environment temperature is greater than or equal to a seventh preset temperature value, and determine whether the first defrosting time length is greater than the second defrosting time length, and whether a difference between the first defrosting time length and the second defrosting time length is greater than a preset difference value; if the temperature drop of the indoor environment temperature is greater than or equal to the seventh preset temperature value, turn on the first electric heating component, turn on the first indoor fan and rotate in a forward direction, turn off the first electronic expansion valve, and increase an opening degree of the second electronic expansion valve according to a preset opening degree; meanwhile, if the first defrosting time length is greater than the second defrosting time length, and the difference between the first defrosting time length and the second defrosting time length is greater than the preset difference value, turn on the second electric heating component, turn on the second indoor fan and rotate in a reverse direction; or, turn on the second electric heating component, turn on the second indoor fan and rotate in a reverse direction, turn off the second electronic expansion valve, and increase an opening degree of the first electronic expansion valve according to a preset opening degree; meanwhile, if the first defrosting time length is greater than the second defrosting time length, and the difference between the first defrosting time length and the second defrosting time length is greater than the preset difference value, turn on the first electric heating component, turn on the first indoor fan and rotate in a reverse direction.

8. An air conditioner characterized by comprising: including: The control device of the air conditioner according to claim 7.

9. A storage medium, characterized by The storage medium includes a stored program, wherein the program controls a device in which the storage medium is located to perform the control method of the air conditioner according to any one of claims 1 to 6 when the program is executed.

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

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