Method and device for controlling defrosting of air conditioner and air conditioner

Abstract

The invention relates to the technical field of air conditioners, and discloses a method for controlling defrosting of an air conditioner, which comprises the following steps: acquiring outdoor environment temperature, indoor environment temperature, coil pipe temperature of an indoor heat exchanger and operation duration of a compressor; determining a heating capacity parameter value according to the indoor environment temperature and the coil pipe temperature of the indoor heat exchanger; and under the condition that the outdoor environment temperature, the operation duration of the compressor and the heating capacity parameter value meet the defrosting condition, the air conditioner is controlled to enter a defrosting mode. In this way, the defrosting mode can be more accurately entered, the situation that the defrosting mode is frequently entered or quitted is avoided, the indoor heating effect is improved, and therefore the user experience is improved. The invention further discloses a device for controlling defrosting of the air conditioner and the air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, for example, to a method and device for controlling defrosting of an air conditioner, and an air conditioner. Background Art

[0002] Currently, some air conditioners are provided with two independent air supply systems for zoned air supply, which can blow different winds in different directions at the same time to meet the needs of different users. However, all the heat sources of the two indoor heat exchangers in the dual air supply system come from the outdoor heat exchanger. When the heat exchange temperature difference between the two indoor heat exchangers is large, the three heat exchangers cannot be in the best heat exchange state.

[0003] For example, a related art provides an air conditioning system, including a compressor, a first indoor heat exchanger, a second indoor heat exchanger, an outdoor heat exchanger and a valve assembly connected by pipelines. Among them, the valve assembly can control the flow direction and / or opening and closing of the refrigerant between the first indoor heat exchanger, the second indoor heat exchanger and the outdoor heat exchanger, so that the first indoor heat exchanger and the second indoor heat exchanger can respectively cool or heat different areas.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] Since all the heat sources of the indoor heat exchanger come from the outdoor heat exchanger, when operating in low-temperature regions or under climatic conditions with heavy snow or strong wind, frosting will inevitably occur on the outdoor heat exchanger. Using conventional defrosting methods, lacking the judgment of the actual frosting situation of the outdoor heat exchanger, it is easy to frequently enter or exit the defrosting mode, thus affecting the heating effect indoors and further affecting the user experience.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0008] The embodiments of the present disclosure provide a method and device for controlling defrosting of an air conditioner, and an air conditioner, which can more accurately enter the defrosting mode, avoid the situation of frequently entering or exiting the defrosting mode, improve the heating effect indoors, and thus improve the user experience.

[0009] In some embodiments, the method for controlling defrosting of an air conditioner includes: obtaining the outdoor ambient temperature, the indoor ambient temperature, the coil temperature of the indoor heat exchanger, and the operating duration of the compressor; determining a heating capacity parameter value based on the indoor ambient temperature and the coil temperature of the indoor heat exchanger; and controlling the air conditioner to enter a defrosting mode to defrost the outdoor heat exchanger when the outdoor ambient temperature, the operating duration of the compressor, and the heating capacity parameter value meet the defrosting condition.

[0010] In some embodiments, determining a heating capacity parameter value based on the indoor ambient temperature and the coil temperature of the indoor heat exchanger includes: determining the heating capacity based on the indoor ambient temperature and the coil temperature of the indoor heat exchanger; calculating the ratio of the heating capacity to a preset heating capacity; using the ratio as the heating capacity parameter value; wherein, the smaller the heating capacity parameter value, the more serious the frosting on the surface of the outdoor heat exchanger.

[0011] In some embodiments, the heating capacity is calculated according to the following formula;

[0012] Q = k f (T c - T r );

[0013] wherein, Q is the heating capacity, k f is the heat transfer coefficient, T c is the coil temperature of the indoor heat exchanger; T r is the indoor ambient temperature.

[0014] In some embodiments, obtaining a preset heating capacity in the following manner includes: calculating the heating capacity within consecutive periods when the outdoor heat exchanger is not frosted; wherein, each period is m minutes, and m is greater than or equal to 1; determining the maximum heating capacity within the consecutive periods; selecting consecutive n periods where the maximum heating capacity is located; calculating the average value of the heating capacity within the consecutive n periods; wherein, n is greater than or equal to 5; and using the average value of the heating capacity as the preset heating capacity.

[0015] In some embodiments, the defrosting condition includes: the outdoor ambient temperature is less than the frosting temperature of the environment where it is located; the operating duration of the compressor is greater than a preset duration; and, the heating capacity parameter value is less than or equal to a first parameter value.

[0016] In some embodiments, the air conditioner includes two indoor heat exchangers connected in parallel to the refrigerant circulation pipeline, and a flow control component is provided on the refrigerant circulation pipeline. Among them, the flow control component is used to adjust the refrigerant flow rate through the two indoor heat exchangers; the air conditioner further includes an air outlet and a fan module respectively arranged on the sides of the two indoor heat exchangers; controlling the air conditioner to enter the defrosting mode includes: when the heating capacity parameter value is less than or equal to the first parameter value, controlling to reduce the rotational speed of the fan module of one of the indoor heat exchangers or turn off the fan module; and / or, controlling the flow control component to reduce the refrigerant flow rate through one of the indoor heat exchangers.

[0017] In some embodiments, controlling the air conditioner to enter the defrosting mode further includes: respectively obtaining the distances between the two air outlets and the user; comparing the distances between the two air outlets and the user; on the side of the indoor heat exchanger where the distance between the air outlet and the user is farther, controlling to reduce the rotational speed of the corresponding fan module or controlling to turn off the fan module; and / or, controlling the flow control component to reduce the refrigerant flow rate through one of the indoor heat exchangers.

[0018] In some embodiments, controlling the air conditioner to enter the defrosting mode further includes: when the heating capacity parameter value is less than or equal to the second parameter value, controlling the flow control valve component to cut off the refrigerant flow rate through one of the indoor heat exchangers and turn off the two fan modules; where the second parameter value is less than the first parameter value.

[0019] In some embodiments, the air conditioner further includes a throttling element provided on the refrigerant circulation pipeline, and the throttling element is used to adjust the refrigerant flow rate through the refrigerant circulation pipeline; controlling the air conditioner to enter the defrosting mode further includes: controlling to increase the flow opening of the throttling element.

[0020] In some embodiments, after controlling the air conditioner to enter the defrosting mode, it further includes: obtaining the running duration of the air conditioner entering the defrosting mode; when the running duration of the air conditioner entering the defrosting mode meets the defrosting exit condition, controlling the air conditioner to exit the defrosting mode.

[0021] In some embodiments, when the running duration of the air conditioner entering the defrosting mode meets the defrosting exit condition, controlling the air conditioner to exit the defrosting mode includes: when the running duration of the air conditioner entering the defrosting mode is greater than the preset defrosting duration, controlling the air conditioner to exit the defrosting mode.

[0022] In some embodiments, after controlling the air conditioner to enter the defrosting mode, it further includes: determining the current heating capacity parameter value; when the current heating capacity parameter value meets the defrosting exit condition, controlling the air conditioner to exit the defrosting mode.

[0023] In some embodiments, a current heating capacity parameter value is determined; when the current heating capacity parameter value meets the defrost exit condition, the air conditioner is controlled to exit the defrost mode, including: when the current heating capacity parameter value is greater than a first parameter value, the air conditioner is controlled to exit the defrost mode.

[0024] In some embodiments, the method for controlling air conditioner defrosting further includes: the coil temperature of the outdoor heat exchanger; calculating the temperature difference between the coil temperature of the outdoor heat exchanger and a preset coil temperature, and when the outdoor ambient temperature, the operation duration of the compressor, the temperature difference, and / or the heating capacity parameter value meet the defrost entry condition, the air conditioner is controlled to enter the defrost mode.

[0025] In some embodiments, the defrost entry condition includes: the outdoor ambient temperature is less than the frosting temperature of the environment; the operation duration of the compressor is greater than a preset duration; the temperature difference is greater than or equal to a preset defrost temperature value; and / or, the heating capacity parameter value is less than or equal to the first parameter value.

[0026] In some embodiments, the device for controlling air conditioner defrosting includes a processor and a memory storing program instructions, and the processor is configured to execute the method for controlling air conditioner defrosting as described in the foregoing embodiments when running the program instructions.

[0027] In some embodiments, the air conditioner includes: an air conditioner body; the device for controlling air conditioner defrosting as described in the foregoing embodiments, which is installed on the air conditioner body.

[0028] The method, device, and air conditioner for controlling air conditioner defrosting provided by the embodiments of the present disclosure can achieve the following technical effects:

[0029] Obtain the outdoor ambient temperature, indoor ambient temperature, coil temperature of the indoor heat exchanger, and operation duration of the compressor; at the same time, determine the heating capacity parameter value according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger; in this way, the actual frosting condition of the outdoor heat exchanger can be considered comprehensively from multiple dimensions to more accurately judge the actual frosting condition of the outdoor heat exchanger, and avoid the situation of frequently entering or exiting the defrost mode. On this basis, when the outdoor ambient temperature, the operation duration of the compressor, and the heating capacity parameter value meet the defrost entry condition, the air conditioner is controlled to enter the defrost mode, so as to effectively remove the frost on the outdoor heat exchanger, thereby improving the indoor heating effect and further improving the user experience.

[0030] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. Description of the Drawings

[0031] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and wherein:

[0032] Figure 1 is a schematic structural diagram of an air conditioner provided by an embodiment of the present disclosure;

[0033] Figure 2 is a refrigerant flow diagram of the air conditioner provided by an embodiment of the present disclosure in the cooling mode;

[0034] Figure 3 is a refrigerant flow diagram of the air conditioner provided by an embodiment of the present disclosure in the heating mode;

[0035] Figure 4 is a refrigerant flow diagram of the air conditioner provided by an embodiment of the present disclosure in the defrosting mode;

[0036] Figure 5 is a schematic diagram of a method for controlling air conditioner defrosting provided by an embodiment of the present disclosure;

[0037] Figure 6 is a schematic diagram of another method for controlling air conditioner defrosting provided by an embodiment of the present disclosure;

[0038] Figure 7 is a schematic diagram of another method for controlling air conditioner defrosting provided by an embodiment of the present disclosure;

[0039] Figure 8 is a schematic diagram of another method for controlling air conditioner defrosting provided by an embodiment of the present disclosure;

[0040] Figure 9 is a schematic diagram of another method for controlling air conditioner defrosting provided by an embodiment of the present disclosure;

[0041] Figure 10 is a schematic diagram of another method for controlling air conditioner defrosting provided by an embodiment of the present disclosure;

[0042] Figure 11 is a schematic diagram of another method for controlling air conditioner defrosting provided by an embodiment of the present disclosure;

[0043] Figure 12 is a schematic structural diagram of a device for controlling air conditioner defrosting provided by an embodiment of the present disclosure;

[0044] Figure 13 is a schematic structural diagram of a wall-mounted air conditioner provided by an embodiment of the present disclosure;

[0045] Figure 14It is a schematic diagram of the structure of a vertical air conditioner provided by an embodiment of the present disclosure.

[0046] Reference numerals:

[0047] 10: Compressor; 11: Gas-liquid separator;

[0048] 20: First refrigerant pipeline; 21: First throttling element;

[0049] 30: Second refrigerant pipeline; 31: Second throttling element;

[0050] 40: Outdoor heat exchanger; 41: Outdoor fan module;

[0051] 50: First indoor heat exchanger; 51: First refrigerant branch; 511: First refrigerant pipe section; 512: Second refrigerant pipe section; 52: First flow control valve; 53: First indoor fan module;

[0052] 60: Second indoor heat exchanger; 61: Second refrigerant branch; 611: Third refrigerant pipe section; 612: Fourth refrigerant pipe section; 62: Second flow control valve; 63: Second indoor fan module;

[0053] 70: Four-way flow splitting element;

[0054] 80, Processor; 81, Memory; 82, Communication interface; 83, Bus;

[0055] 100, Air conditioner body; 200, Device for controlling air conditioner defrosting. Detailed implementation manners

[0056] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present disclosure. In the following technical descriptions, for the sake of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner.

[0057] The terms "first", "second", etc. in the description and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and do not have to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0058] Unless otherwise specified, the term "plurality" means two or more.

[0059] In the embodiments of the present disclosure, the character " / " indicates an "or" relationship between the front and rear objects. For example, A / B means: A or B.

[0060] The term "and / or" is an associated relationship describing an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, the three relationships of A and B.

[0061] The term "corresponding" may refer to an associated relationship or a binding relationship. A corresponding to B means that there is an associated relationship or a binding relationship between A and B.

[0062] Combined Figure 1 As shown, the embodiments of the present disclosure provide an air conditioner, which includes two indoor heat exchangers arranged in parallel in the refrigerant circulation pipeline, and a flow control component is arranged on the refrigerant circulation pipeline. Among them, the flow control component is used to adjust the refrigerant flow rate flowing through the two indoor heat exchangers; specifically, the air conditioner includes an indoor unit and an outdoor unit. Among them, a first indoor heat exchanger 50 and a second indoor heat exchanger 60 are arranged in the indoor unit, and an outdoor heat exchanger 40 is arranged in the outdoor unit. Among them, the refrigerant circulation loop composed of the first indoor heat exchanger 50, the second indoor heat exchanger 60, the outdoor heat exchanger 40, the refrigerant circulation pipeline and corresponding components can realize functions such as refrigeration and heating.

[0063] In the embodiments of the present disclosure, the refrigerant circulation pipeline includes a first refrigerant pipeline 20 and a second refrigerant pipeline 30. The compressor 10 and the outdoor heat exchanger 40 are connected to the first refrigerant pipeline 20 and the second refrigerant pipeline 30. The first indoor heat exchanger 50 is connected between the first refrigerant pipeline 20 and the second refrigerant pipeline 30 through a first refrigerant branch 51; the second indoor heat exchanger 60 is connected between the first refrigerant pipeline 20 and the second refrigerant pipeline 30 through a second refrigerant branch 61.

[0064] In the embodiments of the present disclosure, a flow control assembly is provided on the refrigerant circulation pipeline. The flow control assembly is used to adjust the refrigerant flow rate flowing through the two indoor heat exchangers. The flow control assembly includes a first flow control valve 52 and a second flow control valve 62. Here, the first flow control valve 52 is provided on the first refrigerant branch 51 of the first indoor heat exchanger 50, so that the refrigerant flow rate flowing through the first indoor heat exchanger 50 can be effectively controlled; the second flow control valve 62 is provided on the second refrigerant branch 61 of the second indoor heat exchanger 60, so that the refrigerant flow rate flowing through the second indoor heat exchanger 60 can be effectively controlled. Among them, in the indoor part, that is, when the temperature difference between the first indoor heat exchanger 50 and the second indoor heat exchanger 60 is relatively large, the opening degrees of the first flow control valve 52 and the second flow control valve 62 can be controlled respectively, so as to improve the temperatures of the first indoor heat exchanger 50 and the second indoor heat exchanger 60. In the outdoor part, if frosting occurs on the surface of the outdoor heat exchanger 40, the opening degrees of the first flow control valve 52 and the second flow control valve 62 can be controlled to increase the temperature of the refrigerant entering the outdoor heat exchanger 40, so as to achieve defrosting. Therefore, each heat exchanger in the air conditioner can be in the best heat exchange state, thereby improving the heat exchange efficiency of the entire air conditioner.

[0065] In some embodiments, the first refrigerant branch 51 includes a first refrigerant pipe section 511 connected between the refrigerant end of the first indoor heat exchanger 50 and the first refrigerant pipeline 20, and a second refrigerant pipe section 512 connected between the refrigerant end of the first indoor heat exchanger 50 and the second refrigerant pipeline 30.

[0066] When the first indoor heat exchanger 50 is used as an evaporator, the refrigerant flows from the second refrigerant pipeline 30 into the second refrigerant pipe section 512, and then from the second refrigerant pipe section 512 into the first indoor heat exchanger 50. When the first indoor heat exchanger 50 is used as a condenser, the refrigerant flows from the first refrigerant pipeline 20 into the first refrigerant pipe section 511, and then from the first refrigerant pipe section 511 into the first indoor heat exchanger 50.

[0067] In some embodiments, the second refrigerant branch 61 includes a third refrigerant pipe section 611 connected between the refrigerant end of the second indoor heat exchanger 60 and the first refrigerant pipeline 20, and a fourth refrigerant pipe section 612 connected between the refrigerant end of the second indoor heat exchanger 60 and the second refrigerant pipeline 30.

[0068] When the second indoor heat exchanger 60 is used as an evaporator, the refrigerant flows from the second refrigerant pipeline 30 into the fourth refrigerant pipe section 612, and then from the fourth refrigerant pipe section 612 into the second indoor heat exchanger 60. When the second indoor heat exchanger 60 is used as a condenser, the refrigerant flows from the first refrigerant pipeline 20 into the third refrigerant pipe section 611, and then from the third refrigerant pipe section 611 into the second indoor heat exchanger 60.

[0069] In some embodiments, two first flow control valves 52 are provided and are respectively arranged on the first refrigerant pipe section 511 and the second refrigerant pipe section 512. In this way, when the first indoor heat exchanger 50 switches between the evaporator in cooling mode and the condenser in heating mode, the flow direction of the refrigerant will change. Here, in order to further control the refrigerant flow rate in the first indoor heat exchanger 50, two first flow control valves 52 are provided and are respectively arranged on the first refrigerant pipe section 511 and the second refrigerant pipe section 512. In this way, regardless of how the state of the first indoor heat exchanger 50 switches, the two first flow control valves 52 can well control the refrigerant flow rate in the first indoor heat exchanger 50. Among them, if it is necessary to increase the refrigerant flow rate in the second indoor heat exchanger 60, the opening degrees of the two first flow control valves 52 can be controlled simultaneously, or even the two first flow control valves 52 can be closed.

[0070] In some embodiments, two second flow control valves 62 are provided and are respectively arranged on the third refrigerant pipe section 611 and the fourth refrigerant pipe section 612. In this way, when the second indoor heat exchanger 60 switches between the evaporator in cooling mode and the condenser in heating mode, the flow direction of the refrigerant will change. Here, in order to further control the refrigerant flow rate in the second indoor heat exchanger 60, two second flow control valves 62 are provided and are respectively arranged on the third refrigerant pipe section 611 and the fourth refrigerant pipe section 612. In this way, regardless of how the state of the second indoor heat exchanger 60 switches, the two second flow control valves 62 can well control the refrigerant flow rate in the second indoor heat exchanger 60. Among them, if it is necessary to increase the refrigerant flow rate in the first indoor heat exchanger 50, the opening degrees of the two second flow control valves 62 can be controlled simultaneously, or even the two second flow control valves 62 can be closed.

[0071] In the embodiments of the present disclosure, both the first flow control valve 52 and the second flow control valve 62 can adopt electronic expansion valves. Therefore, the first flow control valve 52 can control the refrigerant flow rate flowing through the first indoor heat exchanger 50, and the second flow control valve 62 can control the refrigerant flow rate flowing through the second indoor heat exchanger 60. In this way, by independently controlling the refrigerant flow rates in the first indoor heat exchanger 50 and the second indoor heat exchanger 60, differential control of cooling or heating in the same spatial area and time can be achieved; in addition, it can also prevent the indoor temperature from dropping significantly when the outdoor heat exchanger 40 defrosts, thereby improving the user experience and the reliability of the system.

[0072] Combined Figure 1 As shown, in some embodiments, the air conditioner further includes a throttling element arranged on the refrigerant circulation pipeline, and the throttling element is used to adjust the refrigerant flow rate flowing through the refrigerant circulation pipeline; wherein, the throttling element includes: a first throttling element 21 arranged on the first refrigerant pipeline 20; a second throttling element 31 arranged on the second refrigerant pipeline 30.

[0073] In the embodiments of the present disclosure, the first throttling element 21 can control the flow rate in the first refrigerant pipeline 20, and the second throttling element 31 can control the flow rate in the second refrigerant pipeline 30. Among them, when the air conditioner operates normally, the first throttling element 21 and the second throttling element 31 can operate at a preset opening degree.

[0074] Combined with Figure 1 As shown, in some embodiments, the air conditioner further includes an air outlet and a fan module respectively arranged on the sides of two indoor heat exchangers; the fan module includes: a first indoor fan module 53 arranged on the side of the first indoor heat exchanger 50; a second indoor fan module 63 arranged on the side of the second indoor heat exchanger 60.

[0075] In the embodiments of the present disclosure, the first indoor fan module 53 and the second indoor fan module 63 have the same structure, both of which are composed of a motor and a fan. By controlling the rotation speeds of the first indoor fan module 53 and the second indoor fan module 63, the heat exchange rate between the first indoor heat exchanger 50 and the second indoor heat exchanger 60 and the indoor environment is improved.

[0076] Combined with Figure 1 As shown, in some embodiments, the air conditioner further includes: an outdoor fan module 41 arranged on the side of the outdoor heat exchanger 40. Here, the outdoor fan module 41 includes a motor and a fan. By controlling the rotation speed of the outdoor fan module 41, the heat exchange rate between the outdoor heat exchanger 40 and the outdoor environment is improved.

[0077] In some specific embodiments, combined with Figure 2 As shown, when the first indoor heat exchanger 50 and the second indoor heat exchanger 60 in the air conditioner perform refrigeration operation, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gas after passing through the compressor 10. The high-temperature and high-pressure gaseous refrigerant passes through the outdoor heat exchanger 40, exchanges heat with the outdoor environment and becomes a low-temperature and low-pressure liquid refrigerant. The liquid refrigerant passes through the first throttling element 30 to throttle and reduce the pressure and enters the first indoor heat exchanger 50 and the second indoor heat exchanger 60. At this time, the opening degrees of the first flow control valve 52 and the second flow control valve 62 are automatically controlled according to the user's needs, so as to realize different heat exchange requirements.

[0078] In some specific embodiments, combined with Figure 3 As shown, when the first indoor heat exchanger 50 and the second indoor heat exchanger 60 in the air conditioner perform heating operation, the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gas after passing through the compressor 10. The high-temperature and high-pressure gaseous refrigerant directly enters the first indoor heat exchanger 50 and the second indoor heat exchanger 60. The opening degrees of the first flow control valve 52 and the second flow control valve 62 are automatically controlled according to the user's needs, so as to realize different heat exchange requirements.

[0079] In some specific embodiments, combined with Figure 4As shown, when the outdoor heat exchanger 40 in the heat exchange system performs defrosting operation, at this time, the first flow control valve 52 or the second flow control valve 62 is closed, so that the high-temperature and high-pressure refrigerant only flows through the first indoor heat exchanger 50 or the second indoor heat exchanger 60, thereby reducing the consumption of high-temperature refrigerant on the indoor side and increasing the heat for defrosting of the outdoor heat exchanger 40. In addition, each blower module can also be controlled according to the frosting thickness or defrosting stage of the outdoor heat exchanger 40. For example, when the outdoor heat exchanger 40 is frosted more, the first indoor blower module 53 and the second indoor blower module 63 are controlled to be closed. For example, when the outdoor heat exchanger 40 is frosted less, the first indoor blower module 53 and the second indoor blower module 63 are controlled to operate at a lower speed.

[0080] Combined with Figure 1 As shown, in some embodiments, the air conditioner further includes: a four-way shunt element 70, whose first end is connected to the exhaust port of the compressor 10, the second end is connected to the suction port of the compressor 10, the third end is connected to the outdoor heat exchanger 40, and the fourth end is connected to the first refrigerant pipeline 20.

[0081] In the embodiments of the present disclosure, the compressor 10 has an exhaust port and a suction port. Among them, the exhaust port of the compressor 10 is connected to the first end of the four-way shunt element 70, so that the refrigerant enters the first refrigerant pipeline 20 or the outdoor heat exchanger 40 through the four-way shunt element 70; the suction port of the compressor 10 is connected with a gas-liquid separator 11, and the gas-liquid separator 11 is connected to the second end of the four-way shunt element 70, so that the refrigerant in the first refrigerant pipeline 20 or the outdoor heat exchanger 40 enters the gas-liquid separator 11 for gas-liquid separation, and the separated gaseous refrigerant then flows back to the compressor 10.

[0082] Using the air conditioner provided in this embodiment can improve the defrosting rate during outdoor defrosting, effectively improve the problem of a large drop in indoor temperature during defrosting. In addition, it is not necessary to stop the machine to change the refrigerant flow direction during defrosting, reducing the failure probability and the risk of liquid slugging of the compressor, thereby further improving the reliability of the system and then enhancing the user experience.

[0083] In addition, the air conditioner further includes an electronic control device. The electronic control device includes a processor, and through the processor, the operation of the air conditioner can be controlled, including but not limited to the control of the compressor, throttling element and blower module.

[0084] Based on the above structure of the air conditioner, the embodiments of the present disclosure provide a method for controlling air conditioner defrosting, combined with Figure 5 As shown, the method includes:

[0085] S101. Obtain the outdoor ambient temperature, indoor ambient temperature, coil temperature of the indoor heat exchanger, and the operating duration of the compressor;

[0086] S102. Determine the value of the heating capacity parameter according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger;

[0087] S103. When the outdoor ambient temperature, the operating duration of the compressor, and the value of the heating capacity parameter meet the defrosting entry condition, control the air conditioner to enter the defrosting mode and defrost the outdoor heat exchanger.

[0088] By using the method for controlling air conditioner defrosting provided by the embodiments of the present disclosure, the outdoor ambient temperature, the indoor ambient temperature, the coil temperature of the indoor heat exchanger, and the operating duration of the compressor are obtained. At the same time, the value of the heating capacity parameter is determined according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger. In this way, the actual frosting condition of the outdoor heat exchanger can be comprehensively considered from multiple dimensions to more accurately judge the actual frosting condition of the outdoor heat exchanger, and avoid the situation of frequently entering or exiting the defrosting mode. On this basis, when the outdoor ambient temperature, the operating duration of the compressor, and the value of the heating capacity parameter meet the defrosting entry condition, control the air conditioner to enter the defrosting mode, which can effectively remove the frost on the outdoor heat exchanger, thereby improving the indoor heating effect and further improving the user experience.

[0089] In the embodiments of the present disclosure, two indoor heat exchangers are provided in the indoor unit. Therefore, corresponding sensors are provided on each indoor heat exchanger. Here, the two indoor heat exchangers are arranged in parallel, and in the initial state (i.e., when just started), the operating states of the respective fan modules and flow control components in each indoor heat exchanger are the same, so that the coil temperatures of the two indoor heat exchangers are closer.

[0090] Optionally, a first temperature sensor is provided on the coil of the first indoor heat exchanger to obtain the coil temperature of the first indoor heat exchanger in real time. Optionally, a second temperature sensor is provided on the coil of the second indoor heat exchanger to obtain the coil temperature of the second indoor heat exchanger in real time. Optionally, a third temperature sensor is provided indoors or on the indoor unit to obtain the indoor ambient temperature in real time. A fourth temperature sensor is provided on the outdoor unit to obtain the outdoor ambient temperature in real time. Optionally, the processor obtains the operating duration of the power module connected to the compressor in real time.

[0091] When the air conditioner heats at the temperature set by the user, if the heating effect of the air conditioner is poor, there may be various factors. For example, changes in the operating frequency of the compressor, frosting of the coils of the outdoor heat exchanger, the rotational speed of the fan module, and / or the opening degree of the throttling element will all affect indoor heating. In the embodiments of the present disclosure, in order to more accurately determine whether frosting of the coils of the outdoor heat exchanger affects the heating effect, it is determined whether to control the air conditioner to enter the defrosting mode and defrost the outdoor heat exchanger based on the outdoor ambient temperature, the operating duration of the compressor, and the value of the heating capacity parameter. Among them, the value of the heating capacity parameter is determined according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger. Here, the value of the heating capacity parameter can represent the actual heating capacity of the indoor heat exchanger.

[0092] In some embodiments, as shown in combination with Figure 6 determining the value of the heating capacity parameter according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger includes:

[0093] S201. Determine the heating capacity according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger;

[0094] S202. Calculate the ratio of the heating capacity to the preset heating capacity;

[0095] S203. Use the ratio as the value of the heating capacity parameter; wherein, the smaller the value of the heating capacity parameter, the more serious the frosting on the surface of the outdoor heat exchanger.

[0096] Optionally, in some embodiments, the heating capacity is calculated according to the following formula;

[0097] Q = k f (T c - T r );

[0098] wherein, Q is the heating capacity, k f is the heat transfer coefficient, T c is the coil temperature of the indoor heat exchanger; T r is the indoor ambient temperature.

[0099] In the embodiments of the present disclosure, since the heat exchange amount of the air conditioner is different under different operating environment parameters. Therefore, the heat transfer coefficient is also affected. Here, the value of the heat transfer coefficient is [0, 1]. In addition, considering the actual felt temperature of the user comprehensively, by continuously calculating the temperature difference value ΔT = T c - T r between the indoor ambient temperature and the coil temperature of the indoor heat exchanger, the temperature difference value is approximately used as the heat transfer temperature difference, and the heating capacity is obtained through the temperature difference value and the heat transfer coefficient.

[0100] In the embodiments of the present disclosure, calculate the ratio of the heating capacity to the preset heating capacity, and use the ratio as the heating capacity parameter value; wherein, the smaller the heating capacity parameter value is, the more serious the frosting on the surface of the outdoor heat exchanger is. Here, since the preset heating capacity is the preset value of the air conditioner, it represents the heating capacity of the air conditioner in the normal operating state. When the ratio of the heating capacity to the preset heating capacity becomes smaller, it indicates that the heating capacity of the air conditioner deteriorates. Therefore, it can be used as one of the reference factors for whether the outdoor heat exchanger needs defrosting.

[0101] In some embodiments, in combination with Figure 7 as shown, the preset heating capacity is obtained in the following manner, including:

[0102] S301. When the outdoor heat exchanger is not frosted, calculate the heating capacity within consecutive periods respectively; wherein, each period is m minutes, and m is greater than or equal to 1;

[0103] S302. Determine the maximum heating capacity within the consecutive periods;

[0104] S303. Select the consecutive n periods where the maximum heating capacity is located;

[0105] S304. Calculate the average value of the heating capacity within the consecutive n periods; wherein, n is greater than or equal to 5;

[0106] S305. Use the average value of the heating capacity as the preset heating capacity.

[0107] In the embodiments of the present disclosure, when the outdoor heat exchanger is not frosted, it represents the heating capacity of the air conditioner in the normal operating state. Calculate the heating capacity within consecutive periods respectively, each period is m minutes, and m is greater than or equal to 1. In this way, the maximum heating capacity of the air conditioner in the normal operating state can be obtained. On this basis, determine the maximum heating capacity within the consecutive periods, select the consecutive n periods where the maximum heating capacity is located, and calculate the average value of the heating capacity within the consecutive n periods; wherein, n is greater than or equal to 5; in this way, the heating capacity when the heating effect of the air conditioner is the best can be determined, and use the average value of this heating capacity as the preset heating capacity, and compare the preset heating capacity with the actual heating capacity, which can accurately reflect whether the heating effect of the air conditioner deteriorates.

[0108] Optionally, in some embodiments, the defrosting conditions include: the outdoor ambient temperature is less than the frosting temperature of the environment; the operating duration of the compressor is greater than the preset duration; and, the heating capacity parameter value is less than or equal to the first parameter value.

[0109] In the embodiments of the present disclosure, the comparison between the outdoor ambient temperature and the frosting temperature of the environment is one of the important factors for judging whether the outdoor heat exchanger is frosted. Here, since the outdoor heat exchanger is an evaporator and needs to absorb heat, if the outdoor ambient temperature is less than the frosting temperature of the environment, there is a high risk of frosting on the outdoor heat exchanger.

[0110] In the embodiments of the present disclosure, during the initial startup of the compressor, its operating frequency needs to gradually increase. Therefore, the refrigerant temperatures in the outdoor heat exchanger and the indoor heat exchanger are not high, that is, the heat exchange effect of the outdoor heat exchanger is poor, and thus the risk of frosting is low. However, when the operating duration of the compressor is greater than a preset duration, the operating frequency of the compressor gradually stabilizes, resulting in a better heat exchange effect of the outdoor heat exchanger, that is, a higher risk of frosting.

[0111] In the embodiments of the present disclosure, through the above analysis, it can be known that by comparing the preset heating capacity with the actual heating capacity, it can accurately reflect whether the heating effect of the air conditioner has deteriorated. Here, under the conditions that the above-mentioned outdoor ambient temperature is less than the frosting temperature of the ambient environment, the operating duration of the compressor is greater than the preset duration, and the heating capacity parameter value is less than or equal to the first parameter value, it can be determined that the outdoor heat exchanger has frosted and needs to be defrosted. If the above conditions are not met, it is impossible to accurately determine that the outdoor heat exchanger has frosted, and it may also be affected by other factors.

[0112] In some embodiments, controlling the air conditioner to enter the defrosting mode includes: when the heating capacity parameter value is less than or equal to the first parameter value, controlling to reduce the rotational speed of the fan module of one of the indoor heat exchangers or shutting down the fan module; and / or, controlling the flow control component to reduce the refrigerant flow rate through one of the indoor heat exchangers.

[0113] In the embodiments of the present disclosure, when the above conditions are met, it is determined that the outdoor heat exchanger has frosted, and it is necessary to control the air conditioner to enter the defrosting mode to defrost the indoor heat exchanger.

[0114] Here, since the air conditioner has two indoor heat exchangers. Therefore, the fan module of one of the indoor heat exchangers can be changed. Optionally, the heat exchange rate between the indoor heat exchanger and the indoor environment can be reduced, so that the refrigerant flowing out of the indoor heat exchanger and then flowing into the outdoor heat exchanger can retain more heat, which can not only improve the defrosting effect of the outdoor heat exchanger by utilizing the refrigerant heat.

[0115] The refrigerant flow rate through one of the indoor heat exchangers can also be changed. Optionally, the refrigerant flow rate through one of the indoor heat exchangers is reduced, so that the refrigerant flowing out of the other indoor heat exchanger and then flowing into the outdoor heat exchanger can retain more heat, which can not only improve the defrosting effect of the outdoor heat exchanger by utilizing the refrigerant heat, but also provide heating for the room to ensure the indoor temperature.

[0116] In the embodiments of the present disclosure, the value range of the first parameter value is [0.75, 0.85].

[0117] To further improve the user experience, in combination with Figure 8As shown, in some embodiments, controlling the air conditioner to enter the defrosting mode further includes:

[0118] S401. Obtain the distances between the two air outlets and the user respectively;

[0119] S402. Compare the distances between the two air outlets and the user;

[0120] S403. On the side of the indoor heat exchanger where the distance between the air outlet and the user is farther, control to reduce the rotational speed of the corresponding fan module or control to shut down the fan module; and / or, control the flow control component to reduce the refrigerant flow rate through one of the indoor heat exchangers.

[0121] In the embodiments of the present disclosure, since there is a certain loss when the temperature of the air from the air outlet is transmitted to the user side, that is, the temperature of the air from the air outlet is higher than the actual temperature felt by the user. Here, based on the distance between the air outlet and the user, the fan module and the refrigerant flow rate of the indoor heat exchanger on the side of the air outlet with a farther distance are preferentially controlled. In this way, to a certain extent, the situation where the actual temperature felt by the user changes can be reduced, thereby further improving the user experience.

[0122] In some embodiments, controlling the air conditioner to enter the defrosting mode further includes: controlling the air conditioner to enter the defrosting mode further includes: when the heating capacity parameter value is less than or equal to the second parameter value, control the flow control valve assembly to cut off the refrigerant flow rate through one of the indoor heat exchangers, and shut down the two fan modules; wherein, the second parameter value is less than the first parameter value.

[0123] In the embodiments of the present disclosure, the second parameter value is less than the first parameter value, and the value range of the second parameter value is [0.55, 0.65]. That is, at this time, the frosting thickness of the outdoor heat exchanger is greater than the frosting thickness of the outdoor heat exchanger under the condition that the heating capacity parameter value is less than or equal to the first parameter value. Therefore, close the flow control valve of the indoor heat exchanger on the side of the air outlet with a farther distance, and shut down the two fan modules, so that the high-temperature and high-pressure refrigerant only flows through the first indoor heat exchanger or the second indoor heat exchanger, thereby reducing the consumption of the high-temperature refrigerant on the indoor side and increasing the heat for defrosting the outdoor heat exchanger.

[0124] Optionally, in some embodiments, controlling the air conditioner to enter the defrosting mode further includes: controlling to increase the flow opening of the throttling element.

[0125] In the embodiments of the present disclosure, when the outdoor heat exchanger is frosted, controlling to increase the opening degrees of the first throttling element and the second throttling element can reduce the throttling effects of the first throttling element and the second throttling element, so that the refrigerant flowing through the first throttling element and the second throttling element can maintain a relatively high temperature, thereby enabling the refrigerant flowing into the outdoor heat exchanger subsequently to achieve a better defrosting effect.

[0126] CombinedFigure 9 As shown, in some embodiments, after controlling the air conditioner to enter the defrosting mode, it further includes:

[0127] S501. Obtain the running duration of the air conditioner in the defrosting mode;

[0128] S502. When the running duration of the air conditioner in the defrosting mode meets the defrosting exit condition, control the air conditioner to exit the defrosting mode.

[0129] In the embodiments of the present disclosure, when the air conditioner enters the defrosting mode, the outdoor heat exchanger will be defrosted. However, in order not to affect the user experience, it is necessary to control the running duration of the air conditioner in the defrosting mode. Here, the processor obtains the running duration of the air conditioner in the defrosting mode in real time. Optionally, in some embodiments, when the running duration of the air conditioner in the defrosting mode is greater than the preset defrosting duration, control the air conditioner to exit the defrosting mode.

[0130] Combined with Figure 10 As shown, in some embodiments, after controlling the air conditioner to enter the defrosting mode, it further includes:

[0131] S601. Determine the current heating capacity parameter value;

[0132] S602. When the current heating capacity parameter value meets the defrosting exit condition, control the air conditioner to exit the defrosting mode.

[0133] Optionally, in some embodiments, when the current heating capacity parameter value is greater than the first parameter value, control the air conditioner to exit the defrosting mode. Here, when the current heating capacity parameter value is greater than the first parameter value, it indicates that the air conditioner has returned to the normal operation mode. At this time, all the flow components that were cut off are opened, and all the fan modules are synchronously turned on, and the air conditioner enters the high wind operation mode, so as to achieve a fast heating experience.

[0134] Combined with Figure 11 As shown, in some embodiments, the method for controlling the air conditioner defrosting further includes:

[0135] S701. Obtain the coil temperature of the outdoor heat exchanger;

[0136] S702. Calculate the temperature difference between the coil temperature of the outdoor heat exchanger and the preset coil temperature;

[0137] S703. When the outdoor ambient temperature, the running duration of the compressor, the temperature difference, and / or the heating capacity parameter value meet the defrosting entry condition, control the air conditioner to enter the defrosting mode.

[0138] Optionally, in some embodiments, the conditions for entering the defrosting mode include: the outdoor ambient temperature is lower than the frosting temperature of the environment; the operating duration of the compressor is greater than a preset duration; the temperature difference is greater than or equal to a preset defrosting temperature value; and / or the heating capacity parameter value is less than or equal to a first parameter value.

[0139] In the embodiments of the present disclosure, the coil temperature of the outdoor heat exchanger is also one of the important factors for determining whether the outdoor heat exchanger is frosted. Here, the outdoor heat exchanger is an evaporator, which needs to absorb heat, that is, the coil temperature of the outdoor heat exchanger is relatively low. Therefore, by comprehensively considering the above conditions and the temperature difference between the coil temperature of the outdoor heat exchanger and the preset coil temperature, it is also possible to determine whether frosting occurs on the outdoor heat exchanger, so as to control the air conditioner to enter the defrosting mode and defrost the outdoor heat exchanger.

[0140] Combined with Figure 12 As shown in the figure, the embodiments of the present disclosure provide a device 200 for controlling air conditioner defrosting, including a processor 80 and a memory 81. Optionally, the device 200 may further include a communication interface 82 and a bus 83. Among them, the processor 80, the communication interface 82, and the memory 81 can communicate with each other through the bus 83. The communication interface 82 can be used for information transmission. The processor 80 can call the logical instructions in the memory 81 to execute the method for controlling air conditioner defrosting in the above embodiments.

[0141] In addition, when the logical instructions in the above-mentioned memory 81 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium.

[0142] The memory 81, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of the present disclosure. The processor 80 executes functional applications and data processing by running the program instructions / modules stored in the memory 81, that is, implements the method for controlling air conditioner defrosting in the above embodiments.

[0143] The memory 81 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 81 may include a high-speed random access memory and may also include a non-volatile memory.

[0144] Combined with Figure 13 shown in Figure 14As shown, an embodiment of the present disclosure provides an air conditioner, including: an air conditioner main body 100, and the above-mentioned device 200 for controlling air conditioner defrosting. The device 200 for controlling air conditioner defrosting is installed on the air conditioner main body 100. The installation relationship described here is not limited to being placed inside the air conditioner main body, but also includes installation connections with other components of the air conditioner, including but not limited to physical connections, electrical connections, or signal transmission connections, etc. Those skilled in the art can understand that the device for the air conditioner can be adapted to a feasible air conditioner main body, thereby implementing other feasible embodiments.

[0145] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are configured to execute the above-mentioned method for controlling air conditioner defrosting.

[0146] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The foregoing storage medium may be a non-transitory storage medium, such as: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc, etc., which are various media that can store program codes.

[0147] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. Embodiments merely represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terms used in this application are only for describing embodiments and do not limit the claims. As used in the description of embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations of one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups of these. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, or apparatus comprising the element. Herein, each embodiment may focus on the differences from other embodiments, and the same or similar parts among the embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, the relevant parts may refer to the description of the method parts.

[0148] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner may depend on the specific application and design constraints of the technical solution. The skilled person may use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The skilled person can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0149] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Additionally, the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical, or other forms. The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. Additionally, in the embodiments of the present disclosure, the various functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0150] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to the embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the block can occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks can also occur in a different order than disclosed in the description. Sometimes, there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. Each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling air conditioner defrosting, characterized in that, Comprising: Obtaining the outdoor ambient temperature, the indoor ambient temperature, the coil temperature of the indoor heat exchanger, and the operating duration of the compressor; Determining the heating capacity parameter value according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger; When the outdoor ambient temperature, the operating duration of the compressor, and the heating capacity parameter value meet the defrosting condition, controlling the air conditioner to enter the defrosting mode to defrost the outdoor heat exchanger.

2. The method according to claim 1, characterized in that, Determining the heating capacity parameter value according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger, including: Determining the heating capacity according to the indoor ambient temperature and the coil temperature of the indoor heat exchanger; Calculating the ratio of the heating capacity to the preset heating capacity; Taking the ratio as the heating capacity parameter value; Wherein, the smaller the heating capacity parameter value is, the more serious the frosting on the surface of the outdoor heat exchanger is.

3. The method according to claim 2, wherein Obtaining the preset heating capacity in the following manner, including: When the outdoor heat exchanger is not frosted, calculating the heating capacity within continuous periods respectively; wherein, each period is m minutes, and m is greater than or equal to 1; Determining the maximum heating capacity within the continuous periods; Selecting the continuous n periods where the maximum heating capacity is located; Calculating the average value of the heating capacity within the continuous n periods; wherein, n is greater than or equal to 5; Taking the average value of the heating capacity as the preset heating capacity.

4. The method according to any one of claims 1 to 3, characterized in that The defrosting condition includes: The outdoor ambient temperature is less than the frosting temperature of the environment where it is located; The operating duration of the compressor is greater than the preset duration; and, The heating capacity parameter value is less than or equal to the first parameter value.

5. The method according to claim 4, wherein The air conditioner includes two indoor heat exchangers connected in parallel to the refrigerant circulation pipeline, and a flow control component is arranged on the refrigerant circulation pipeline. Wherein, the flow control component is used to adjust the refrigerant flow rate flowing through the two indoor heat exchangers; the air conditioner also includes an air outlet and a fan module respectively arranged on the sides of the two indoor heat exchangers; controlling the air conditioner to enter the defrosting mode to defrost the outdoor heat exchanger, including: When the heating capacity parameter value is less than or equal to the first parameter value, controlling to reduce the rotation speed of the fan module of one of the indoor heat exchangers or shut down the fan module; and / or, controlling the flow control component to reduce the refrigerant flow rate flowing through one of the indoor heat exchangers.

6. The method according to claim 5, wherein Controlling the air conditioner to enter the defrosting mode further includes: Respectively obtaining the distances between the two air outlets and the user; Comparing the distances between the two air outlets and the user; On the side of the indoor heat exchanger where the distance between the air outlet and the user is farther, controlling to reduce the rotation speed of the corresponding fan module or controlling to shut down the fan module; and / or, controlling the flow control component to reduce the refrigerant flow rate flowing through one of the indoor heat exchangers.

7. The method according to claim 5, wherein Controlling the air conditioner to enter the defrosting mode further includes: When the heating capacity parameter value is less than or equal to the second parameter value, controlling the flow control valve component to cut off the refrigerant flow rate flowing through one of the indoor heat exchangers and shut down the two fan modules; wherein, the second parameter value is less than the first parameter value.

8. The method according to any one of claims 1 to 3, characterized in that, After controlling the air conditioner to enter the defrosting mode to defrost the outdoor heat exchanger, it further includes: Obtaining the operating duration of the air conditioner entering the defrosting mode; When the operating duration of the air conditioner entering the defrosting mode meets the defrosting exit condition, controlling the air conditioner to exit the defrosting mode.

9. A device for controlling air conditioner defrosting, comprising a processor and a memory storing program instructions, characterized in that The processor is configured to execute the method for controlling air conditioner defrosting according to any one of claims 1 to 8 when running the program instructions.

10. An air conditioner, characterized in that, Comprising: Air conditioner body; The device for controlling defrosting of an air conditioner according to claim 9, installed on the air conditioner body.

Images