Defrosting control method and device, air conditioning equipment and computer readable storage medium

Abstract

The embodiment of the invention provides a defrosting control method and device, air conditioning equipment and a computer readable storage medium, the defrosting control method comprises the steps that the outdoor environment temperature, the outdoor environment humidity and first frosting time are obtained, and the first frosting time is heating operation time before an outdoor heat exchanger reaches a non-reversing defrosting critical state; determining a reference frosting time range according to the outdoor environment temperature and the outdoor environment humidity; determining whether the first frosting time is within the reference frosting time range or not; when it is determined that the first frosting time is within the reference frosting time range, the air conditioner equipment is controlled to enter a non-reversing defrosting mode; and when it is determined that the first frosting time is smaller than the lower limit of the reference frosting time range, the air conditioner equipment is controlled to maintain a heating operation mode, and after a reverse defrosting condition is met, the air conditioner equipment is controlled to enter a reverse defrosting mode.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning equipment, and in particular to a defrost control method, device, air-conditioning equipment, and computer-readable storage medium. Background Art

[0002] When air conditioners are heating in low-temperature environments, frost easily forms on the outdoor heat exchanger. Some air conditioners in the related art feature a non-reversing defrost mode and a reverse defrost mode to remove frost from the surface of the outdoor heat exchanger. However, these control methods for air conditioners are unable to accurately control the selection of either the non-reversing or reverse defrost mode, resulting in poor defrost control and reduced energy efficiency and heating performance. Summary of the Invention

[0003] The embodiments of the present application provide a defrost control method, device, air-conditioning equipment and computer-readable storage medium, which can control the air-conditioning equipment to accurately select to enter the non-reversing defrost mode or the reverse defrost mode, improve the defrost control effect of the air-conditioning equipment, and thus improve the operating energy efficiency and heating effect of the air-conditioning equipment.

[0004] In a first aspect, an embodiment of the present application provides a defrost control method, comprising: obtaining the outdoor ambient temperature, the outdoor ambient humidity and a first frosting time, the first frosting time being the heating operation time before the outdoor heat exchanger reaches the critical state of non-reversing defrosting; determining a reference frosting time range based on the outdoor ambient temperature and the outdoor ambient humidity; determining whether the first frosting time is within the reference frosting time range; when it is determined that the first frosting time is within the reference frosting time range, controlling the air-conditioning equipment to enter a non-reversing defrost mode; when it is determined that the first frosting time is less than the lower limit of the reference frosting time range, controlling the air-conditioning equipment to maintain the heating operation mode, and controlling the air-conditioning equipment to enter a reverse defrost mode after the reverse defrost condition is met.

[0005] In some embodiments, the air-conditioning equipment includes a water-side heat exchanger; controlling the air-conditioning equipment to enter a non-reversing defrost mode includes: obtaining the water inlet temperature of the water-side heat exchanger; based on a non-reversing defrost frequency operation model, determining the target compressor frequency of the non-reversing defrost mode according to the outdoor ambient temperature and the water inlet temperature of the water-side heat exchanger; and controlling the compressor operation according to the target compressor frequency.

[0006] In some embodiments, based on a non-reversing defrost frequency operation model, the target compressor frequency of the non-reversing defrost mode is determined according to the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger, including: determining the standard compressor frequency in the non-reversing defrost frequency operation model according to the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger; when the air-conditioning equipment enters the non-reversing defrost mode for the first time under a certain operating condition, the standard compressor frequency is used as the target compressor frequency of the non-reversing defrost mode, and the operating condition includes the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger; when the air-conditioning equipment enters the non-reversing defrost mode again under a certain operating condition, the difference between the standard compressor frequency and the first frequency adjustment amount is used as the target compressor frequency of the non-reversing defrost mode.

[0007] In some embodiments, after controlling the air-conditioning device to enter the non-reversing defrost mode, the defrost control method further includes: when the air-conditioning device completes the non-reversing defrost again under a certain working condition, determining the relationship between the running time of the current non-reversing defrost mode and the running time of the non-reversing defrost mode when the non-reversing defrost was last completed under the working condition, the working condition including the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger; when it is determined that the running time of the current non-reversing defrost mode is less than the running time of the non-reversing defrost mode when the non-reversing defrost was last completed under the working condition, When it is determined that the running time of the current non-reversing defrost mode is less than the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions, and the target compressor frequency of the current non-reversing defrost mode is outside the allowable range of the non-reversing defrost frequency, the corresponding standard compressor frequency in the non-reversing defrost frequency operation model is not updated.

[0008] In some embodiments, the defrost control method further includes: when it is determined that the running time of the current non-reversing defrost mode is greater than the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions, not updating the corresponding standard compressor frequency in the non-reversing defrost frequency operation model; or when it is determined that the running time of the current non-reversing defrost mode is greater than the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions, determining whether the sum of the target compressor frequency of the current non-reversing defrost mode and the second frequency adjustment amount is within the non-reversing defrost frequency operation model. The reversing defrost frequency is within the allowable range; when it is determined that the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode is within the allowable range of the non-reversing defrost frequency, the corresponding standard compressor frequency in the non-reversing defrost frequency operation model is updated according to the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode; when it is determined that the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode is outside the allowable range of the non-reversing defrost frequency, the corresponding standard compressor frequency in the non-reversing defrost frequency operation model is not updated.

[0009] In some embodiments, the air-conditioning equipment includes a water-side heat exchanger; after controlling the air-conditioning equipment to enter the non-reversing defrost mode, the defrost control method further includes: obtaining the outlet water temperature and the inlet water temperature of the water-side heat exchanger; determining the inlet and outlet water temperature difference of the water-side heat exchanger based on the outlet water temperature and the inlet water temperature of the water-side heat exchanger; when the operating time of the non-reversing defrost mode does not reach the non-reversing defrost time threshold and the inlet and outlet water temperature difference of the water-side heat exchanger is less than or equal to the inlet and outlet water temperature difference threshold, controlling the air-conditioning equipment to switch from the non-reversing defrost mode to the heating operation mode; when the operating time of the non-reversing defrost mode reaches the non-reversing defrost time threshold and the inlet and outlet water temperature difference of the water-side heat exchanger is greater than the inlet and outlet water temperature difference threshold, controlling the air-conditioning equipment to switch from the non-reversing defrost mode to the reverse defrost mode.

[0010] In some embodiments, the defrost control method further includes: when it is determined that the first frosting time is greater than an upper limit of the reference frosting time range, controlling the air conditioning device to maintain a heating operation mode.

[0011] In a second aspect, an embodiment of the present application provides a defrost control device, comprising: an acquisition circuit, configured to acquire the outdoor ambient temperature, the outdoor ambient humidity and a first frosting time, the first frosting time being the heating operation time before the outdoor heat exchanger reaches the critical state of non-reversing defrosting; a reference range calculation circuit, configured to determine a reference frosting time range based on the outdoor ambient temperature and the outdoor ambient humidity; a comparison circuit, configured to determine whether the first frosting time is within the reference frosting time range; a non-reversing defrosting circuit, configured to control the air-conditioning equipment to enter a non-reversing defrosting mode when it is determined that the first frosting time is within the reference frosting time range; and a reverse defrosting circuit, configured to control the air-conditioning equipment to enter a reverse defrosting mode when it is determined that the first frosting time is less than the lower limit of the reference frosting time range.

[0012] In a third aspect, an embodiment of the present application provides an air-conditioning device, comprising: a processor; and a memory storing a computer program, wherein the computer program, when executed by the processor, implements the defrost control method as described in any of the above embodiments.

[0013] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. The computer program is loaded by a processor to execute the steps in the defrost control method described above.

[0014] The defrost control method provided in the embodiment of the present application determines a reference frosting time range based on the outdoor ambient temperature and the outdoor ambient humidity, and judges the severity of the current actual outdoor environment and the frosting speed of the outdoor heat exchanger based on the first frosting time and the reference frosting time range. When the frosting speed of the outdoor heat exchanger meets the expected frosting speed corresponding to the non-reversing defrost mode, the air-conditioning equipment is controlled to enter the non-reversing defrost mode. When the frosting speed of the outdoor heat exchanger is too fast, the air-conditioning equipment is not controlled to enter the non-reversing defrost mode, but is controlled to enter the reverse defrost mode after the reverse defrost conditions are met, so as to accurately control the air-conditioning equipment to select to enter the non-reversing defrost mode or the reverse defrost mode, so that the defrost mode of the air-conditioning equipment matches the actual environment, improves the defrost control effect of the air-conditioning equipment, and thus improves the operating energy efficiency and heating effect of the air-conditioning equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a flow chart of a defrost control method provided by some embodiments of the present application;

[0017] Figure 2 is a partial flow chart of a defrost control method provided in some embodiments of the present application;

[0018] Figure 3 is another partial flow chart of the defrost control method provided by some embodiments of the present application;

[0019] Figure 4 is another partial flow chart of the defrost control method provided by some embodiments of the present application;

[0020] Figure 5 is another partial flow chart of the defrost control method provided by some embodiments of the present application;

[0021] Figure 6 is another partial flow chart of the defrost control method provided by some embodiments of the present application;

[0022] Figure 7 is another partial flow chart of the defrost control method provided in some embodiments of the present application;

[0023] Figure 8 This is a structural diagram of the air-conditioning equipment provided in some embodiments of the present application.

[0024] Description of main component symbols:

[0025] 1- Air conditioning equipment, 10- Processor, 20- Memory. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0028] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0029] The use of "suitable for" or "configured to" in this application is intended to be open and inclusive language, and does not exclude devices that are adapted or configured to perform additional tasks or steps. In addition, the use of "based on" is intended to be open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0030] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that one of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0031] like Figure 1 As shown, in the first aspect, an embodiment of the present application provides a defrost control method, which includes S10~S50, and can control the air-conditioning equipment 1 to accurately select to enter the non-reversing defrost mode or the reverse defrost mode, thereby improving the defrost control effect of the air-conditioning equipment 1, thereby improving the operating energy efficiency and heating effect of the air-conditioning equipment 1.

[0032] S10: Obtaining the outdoor ambient temperature, outdoor ambient humidity, and first frost time.

[0033] Here, the outdoor ambient temperature and the outdoor ambient temperature can be measured in real time by a temperature and humidity sensor located outdoors, or can be determined based on real-time weather information released by the local meteorological department. The first frost formation time is the heating operation time before the outdoor heat exchanger reaches the critical state for non-reversing defrost, i.e., the time interval between the start of heating by the air conditioner 1 and the time the outdoor heat exchanger reaches the critical state for non-reversing defrost. When the outdoor heat exchanger reaches the critical state for non-reversing defrost, the frost layer on the surface of the outdoor heat exchanger has significantly affected the operating performance of the outdoor heat exchanger, and the frost layer on the surface of the outdoor heat exchanger must be removed at least in the non-reversing defrost mode.

[0034] S20: Determine a reference frost time range according to the outdoor ambient temperature and the outdoor ambient humidity.

[0035] The reference frosting time range is a reference range of the heating operation time before the outdoor heat exchanger reaches the critical state of non-reversing defrosting, and is used to judge the difference between the current actual outdoor environment and the standard outdoor environment. The reference frosting time range can be determined by experimental testing under different outdoor ambient temperatures and outdoor ambient humidity. The reference frosting time ranges corresponding to different outdoor ambient temperatures and outdoor ambient humidity are different. Here, a correspondence between the outdoor ambient temperature-outdoor ambient humidity and the reference frosting time range can be established in advance. After obtaining the real-time values ​​of the outdoor ambient temperature and the outdoor ambient humidity, the reference frosting time range corresponding to the group of real-time values ​​can be determined based on the corresponding relationship according to the real-time values ​​of the outdoor ambient temperature and the outdoor ambient humidity.

[0036] In some embodiments, multiple outdoor ambient temperature intervals and multiple outdoor ambient humidity intervals can be pre-set, and the multiple outdoor ambient temperature intervals and multiple outdoor ambient humidity intervals can be combined to form multiple outdoor ambient temperature-outdoor ambient humidity combination intervals, and a corresponding reference frosting time range is set for each outdoor ambient temperature-outdoor ambient humidity combination interval. When the air conditioner 1 enters the non-reversing defrost mode, the outdoor ambient temperature-outdoor ambient humidity combination interval in which the group of real-time values ​​is located can be determined based on the real-time values ​​of the outdoor ambient temperature and the outdoor ambient humidity, that is, the combination of the outdoor ambient temperature interval in which the outdoor ambient temperature is located and the outdoor ambient humidity interval in which the outdoor ambient humidity is located, and then the reference frosting time range corresponding to the outdoor ambient temperature-outdoor ambient humidity combination interval can be determined.

[0037] S30: Determine whether the first frosting time is within a reference frosting time range.

[0038] S40: When it is determined that the first frosting time is within the reference frosting time range, the air conditioning device 1 is controlled to enter a non-reversing defrosting mode.

[0039] When the first frosting time is determined to be within the reference frosting time range, it can be determined that the current actual outdoor environment is consistent with the standard outdoor environment, and the frosting speed of the outdoor heat exchanger meets the frosting speed requirement corresponding to the non-reversing defrost mode. At this time, the air conditioner 1 can be controlled to enter the non-reversing defrost mode to control the air conditioner 1 to defrost when the four-way valve is not reversing, so that the air conditioner 1 can still increase heat to the room, continue to maintain the heating effect on the indoor environment, and ensure the comfort of the indoor environment.

[0040] S50: When it is determined that the first frosting time is less than the lower limit of the reference frosting time range, the air conditioning device 1 is controlled to maintain the heating operation mode, and the air conditioning device 1 is controlled to enter the reverse defrost mode after the reverse defrost condition is met.

[0041] If the first frosting time is determined to be less than the lower limit of the reference frosting time range, it can be determined that the current actual outdoor environment is worse than the standard outdoor environment, and the frosting speed of the outdoor heat exchanger exceeds the frosting speed corresponding to the non-reversing defrost mode, that is, the outdoor heat exchanger is frosting too quickly, and the non-reversing defrost mode cannot achieve effective defrosting under the current actual outdoor environment, and is therefore not suitable for the current actual outdoor environment. In this case, the air conditioner 1 can be controlled to maintain the heating operation mode and control the air conditioner 1 to enter the reverse defrost mode when the reverse defrost conditions are met.

[0042] Compared with the related art, the defrost control method provided in the embodiment of the present application determines a reference frosting time range based on the outdoor ambient temperature and the outdoor ambient humidity, and judges the severity of the current actual outdoor environment and the frosting speed of the outdoor heat exchanger based on the first frosting time and the reference frosting time range. When the frosting speed of the outdoor heat exchanger meets the expected frosting speed corresponding to the non-reversing defrost mode, the air-conditioning device 1 is controlled to enter the non-reversing defrost mode. When the frosting speed of the outdoor heat exchanger is too fast, the air-conditioning device 1 is not controlled to enter the non-reversing defrost mode, but is controlled to enter the reverse defrost mode after the reverse defrost conditions are met, so as to accurately control the air-conditioning device 1 to choose to enter the non-reversing defrost mode or the reverse defrost mode, so that the defrost mode of the air-conditioning device 1 matches the actual environment, improves the defrost control effect of the air-conditioning device 1, and thus improves the operating energy efficiency and heating effect of the air-conditioning device 1.

[0043] In some embodiments, the air conditioning device 1 may include a water-side heat exchanger, in which the refrigerant and the secondary coolant of the air conditioning device 1 may exchange heat to provide hot water required for indoor heating or domestic use. Figure 2 As shown, S40 may include S41 to S43.

[0044] S41: Obtain the water inlet temperature of the water-side heat exchanger.

[0045] Here, the water inlet temperature of the water-side heat exchanger can be measured in real time by a temperature sensor provided at the refrigerant inlet of the water-side heat exchanger, or can be calculated and determined by other algorithms.

[0046] S42: Based on the non-reversing defrost frequency calculation model, according to the outdoor ambient temperature and the water inlet temperature of the water-side heat exchanger, determine the target compressor frequency of the non-reversing defrost mode.

[0047] Here, the non-reversing defrost frequency calculation model uses the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger as input variables, and uses the standard compressor frequency of the non-reversing defrost mode as the output result. The non-reversing defrost frequency calculation model can be predetermined based on experimental test data and can be continuously updated based on the actual operating data of the air-conditioning unit 1. In other words, during the experimental test, the air-conditioning unit 1 can be controlled to enter the non-reversing defrost mode under different combinations of outdoor ambient temperature and inlet water temperature of the water-side heat exchanger, and the defrosting effect of the air-conditioning unit 1 under different compressor frequencies can be tested. Based on the above experimental data including the outdoor ambient temperature data, the inlet water temperature data, and the compressor frequency data, a statistical algorithm can be used to determine the corresponding relationship between the outdoor ambient temperature-inlet water temperature and the compressor frequency when the air-conditioning unit 1 has a better non-reversing defrost effect, and thus a non-reversing defrost frequency calculation model can be established based on this corresponding relationship. When the air-conditioning equipment 1 enters the non-reversing defrost mode, the standard compressor frequency corresponding to the set of real-time values ​​can be determined based on the real-time values ​​of the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger and the non-reversing defrost frequency operation model, and the target compressor frequency of the non-reversing defrost mode can be determined based on the standard compressor frequency.

[0048] In some embodiments, the non-reversing defrost frequency calculation model can include multiple outdoor ambient temperature intervals and multiple inlet water temperature intervals. The multiple outdoor ambient temperature intervals and the multiple inlet water temperature intervals can be combined to form multiple outdoor ambient temperature-inlet water temperature combination intervals, and a corresponding target compressor frequency is set for each outdoor ambient temperature-inlet water temperature combination interval. When the air-conditioning device 1 enters the non-reversing defrost mode, the outdoor ambient temperature-inlet water temperature combination interval in which the real-time values ​​are located can be determined based on the real-time values ​​of the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger, that is, the combination of the outdoor ambient temperature interval in which the outdoor ambient temperature is located and the inlet water temperature interval in which the inlet water temperature is located, and then the standard compressor frequency corresponding to the outdoor ambient temperature-inlet water temperature combination interval is determined, and the target compressor frequency of the non-reversing defrost mode is determined based on the standard compressor frequency.

[0049] S43: Control the operation of the compressor according to the target compressor frequency.

[0050] By setting S41 to S43, the target compressor frequency for the non-reversing defrost mode can be accurately determined based on the outdoor ambient temperature and the water inlet temperature of the water-side heat exchanger, and the compressor operation can be controlled based on the target compressor frequency. When the compressor operates at this target compressor frequency, the defrosting effect of air conditioner 1 in the non-reversing defrost mode is better, and the surface frost layer of the outdoor heat exchanger can be removed more quickly and thoroughly without causing a significant decrease in the heating effect of air conditioner 1, thereby avoiding significant fluctuations in the indoor ambient temperature, thereby effectively improving the operating energy efficiency and heating effect of air conditioner 1.

[0051] like Figure 3 As shown, in some examples, S42 may include S421 to S423.

[0052] S421: Determine a standard compressor frequency in a non-reversing defrost frequency calculation model according to the outdoor ambient temperature and the water inlet temperature of the water-side heat exchanger.

[0053] S422: When the air-conditioning device 1 enters the non-reversing defrost mode for the first time under certain operating conditions, the standard compressor frequency is used as the target compressor frequency of the non-reversing defrost mode. The operating conditions include the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger.

[0054] When the air-conditioning device 1 enters the non-reversing defrost mode, if the real-time values ​​of the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger meet a preset condition of the non-reversing defrost frequency calculation model for the first time, for example, if the real-time values ​​of the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger fall into a certain outdoor ambient temperature-inlet water temperature combination interval of the non-reversing defrost frequency calculation model for the first time, it can be considered that the air-conditioning device 1 has entered the non-reversing defrost mode for the first time under a certain operating condition, and the air-conditioning device 1 has not previously entered the non-reversing defrost mode with the standard compressor frequency corresponding to the operating condition. The standard compressor frequency corresponding to the operating condition in the non-reversing defrost frequency calculation model is the original compressor frequency that has not been updated according to actual operating data. At this time, the standard compressor frequency can be used as the target compressor frequency of the non-reversing defrost mode, and the compressor of the air-conditioning device 1 can be controlled to directly operate according to the standard compressor frequency to achieve the non-reversing defrost effect.

[0055] S423: When the air-conditioning device 1 enters the non-reversing defrost mode again under a certain working condition, the difference between the standard compressor frequency and the first frequency adjustment amount is used as the target compressor frequency of the non-reversing defrost mode.

[0056] When the air-conditioning device 1 enters the non-reversing defrost mode, if the real-time values ​​of the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger again meet a preset condition of the non-reversing defrost frequency calculation model, for example, if the real-time values ​​of the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger fall into a certain outdoor ambient temperature-inlet water temperature combination interval of the non-reversing defrost frequency calculation model at least for the second time, it can be considered that the air-conditioning device 1 has entered the non-reversing defrost mode again under this operating condition, and the air-conditioning device 1 has previously entered the non-reversing defrost mode with the standard compressor frequency corresponding to the operating condition. At this time, the difference between the standard compressor frequency and the first frequency adjustment amount can be used as the target compressor frequency of the non-reversing defrost mode, so that the air-conditioning device 1 uses the compressor frequency after one frequency reduction to perform non-reversing defrost under the same operating condition, so as to determine whether the standard compressor frequency can be optimized. Among them, the first frequency adjustment amount can be pre-set in the control system of the air-conditioning equipment 1, and can be used as the minimum frequency reduction amplitude of the compressor in the non-reversing defrost mode. The compressor can be frequency-reduced according to an integer multiple of the first frequency adjustment amount to accurately control the single frequency reduction amplitude of the compressor, thereby improving the optimization accuracy of the standard compressor frequency.

[0057] like Figure 4 As shown, illustratively, after controlling the air-conditioning device 1 to enter the non-reversing defrost mode, the defrost control method may further include S451 to S453.

[0058] S451: When the air-conditioning equipment 1 completes the non-reversing defrost again under a certain working condition, determine the relationship between the running time of the non-reversing defrost mode this time and the running time of the non-reversing defrost mode when the non-reversing defrost was last completed under the working condition. The working conditions include the outdoor ambient temperature and the water inlet temperature of the water side heat exchanger.

[0059] When it is determined that the non-reversing defrost mode has effectively eliminated the frost layer on the surface of the outdoor heat exchanger, it is determined that the air conditioner 1 has completed non-reversing defrost, and the air conditioner 1 can switch from the non-reversing defrost mode to the heating operation mode. Conversely, when it is determined that the non-reversing defrost mode cannot effectively eliminate the frost layer on the surface of the outdoor heat exchanger and it is necessary to switch to the reverse defrost mode for effective defrosting, it is determined that the air conditioner 1 cannot complete non-reversing defrost.

[0060] Here, when air conditioner 1 completes non-reversing defrost again under a certain operating condition, it can be determined that air conditioner 1 has entered the non-reversing defrost mode at least twice under the certain operating condition, and has effectively eliminated the surface frost layer of the outdoor heat exchanger through the non-reversing defrost mode at least twice. Prior to this, i.e., when air conditioner 1 enters the current non-reversing defrost mode, the difference between the standard compressor frequency and the first frequency adjustment amount is used as the target compressor frequency for the non-reversing defrost mode based on S423, so that the current non-reversing defrost mode is reduced in frequency compared to the previous completion of the non-reversing defrost mode under the same operating condition.

[0061] At this time, the running time of the current non-reversing defrost mode and the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions can be obtained; for the sake of convenience, the running time of the current non-reversing defrost mode will be referred to as the current non-reversing defrost cycle, and the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions will be referred to as the last non-reversing defrost cycle.

[0062] S452: When it is determined that the running time of the current non-reversing defrost mode is less than the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions, and the target compressor frequency of the current non-reversing defrost mode is within the allowable range of the non-reversing defrost frequency, the corresponding standard compressor frequency in the non-reversing defrost frequency operation model is updated according to the target compressor frequency of the current non-reversing defrost mode.

[0063] When it is determined that the current non-reversing defrost cycle is less than the previous non-reversing defrost cycle, it can be determined that the target compressor frequency determined based on the S423 frequency reduction can effectively eliminate the surface frost layer of the outdoor heat exchanger and can effectively shorten the defrost time required for non-reversing defrost, indicating that the target compressor frequency of the current non-reversing defrost mode is better than the target compressor frequency when the non-reversing defrost was completed under the previous operating conditions.

[0064] At this point, it is possible to further determine whether the target compressor frequency of the current non-reversing defrost mode is within the allowable range of the non-reversing defrost frequency. Here, the allowable range of the non-reversing defrost frequency is the operating frequency range allowed for the compressor in the non-reversing defrost mode, that is, the compressor can only operate according to the compressor frequency value within the allowable range of the non-reversing defrost frequency. When the target compressor frequency of the current non-reversing defrost mode is within the allowable range of the non-reversing defrost frequency, it can be determined that the target compressor frequency of the current non-reversing defrost mode belongs to the available compressor frequency value, and the standard compressor frequency corresponding to the operating condition in the non-reversing defrost frequency calculation model can be updated to the target compressor frequency of the current non-reversing defrost mode.

[0065] S453: When it is determined that the running time of the current non-reversing defrost mode is less than the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions, and when the target compressor frequency of the current non-reversing defrost mode is outside the allowable range of the non-reversing defrost frequency, the corresponding standard compressor frequency in the non-reversing defrost frequency operation model is not updated.

[0066] As previously described, when it is determined that the current non-reversing defrost cycle is less than the previous non-reversing defrost cycle, it is further determined whether the target compressor frequency for the current non-reversing defrost mode is within the permissible range of the non-reversing defrost frequency. When the target compressor frequency for the current non-reversing defrost mode is outside the permissible range of the non-reversing defrost frequency, it can be determined that the target compressor frequency for the current non-reversing defrost mode is an unusable compressor frequency value, and thus the corresponding standard compressor frequency in the non-reversing defrost frequency calculation model is not updated based on the target compressor frequency for the current non-reversing defrost mode.

[0067] like Figure 5 As shown, exemplarily, the defrost control method may further include S454.

[0068] S454: When it is determined that the running time of the current non-reversing defrost mode is greater than the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions, the corresponding standard compressor frequency in the non-reversing defrost frequency calculation model is not updated.

[0069] When it is determined that the current non-reversing defrost cycle is greater than the previous non-reversing defrost cycle, it can be determined that although the target compressor frequency determined based on the S423 frequency reduction can effectively eliminate the surface frost layer of the outdoor heat exchanger, it will extend the defrost time required for non-reversing defrost, indicating that the target compressor frequency of the current non-reversing defrost mode is inferior to the target compressor frequency when the non-reversing defrost was completed last time under the operating conditions, and therefore the corresponding standard compressor frequency in the non-reversing defrost frequency calculation model is not updated.

[0070] like Figure 6 As shown, for example, the defrost control method may further include S455 to S457.

[0071] S455: When it is determined that the running time of the current non-reversing defrost mode is greater than the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions, determine whether the target compressor frequency of the current non-reversing defrost mode and the sum of the second frequency adjustment amount are within the allowable range of the non-reversing defrost frequency.

[0072] As mentioned above, when it is determined that the current non-reversing defrost cycle is greater than the previous non-reversing defrost cycle, it can be determined that although the target compressor frequency determined based on the S423 frequency reduction can effectively eliminate the surface frost layer of the outdoor heat exchanger, it will extend the defrost time required for non-reversing defrost, indicating that the target compressor frequency of the current non-reversing defrost mode is inferior to the target compressor frequency when the non-reversing defrost was completed under the previous operating conditions.

[0073] At this point, it can be further determined whether the sum of the target compressor frequency of the current non-reversing defrost mode and the second frequency adjustment amount is within the allowable range of the non-reversing defrost frequency. The second frequency adjustment amount can be pre-set in the control system of the air-conditioning device 1 and can serve as the minimum frequency increase amplitude of the compressor in the non-reversing defrost mode. The compressor can perform frequency increase adjustment according to an integer multiple of the first frequency adjustment amount to accurately control the single frequency increase amplitude of the compressor, thereby improving the optimization accuracy of the standard compressor frequency. The values ​​of the first frequency adjustment amount and the second frequency adjustment amount can be the same or different, and this is not limited in the embodiments of the present application.

[0074] S456: When it is determined that the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode is within the allowable range of the non-reversing defrost frequency, the corresponding standard compressor frequency in the non-reversing defrost frequency operation model is updated according to the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode.

[0075] When it is determined that the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode is within the allowable range of the non-reversing defrost frequency, it can be determined that the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode belongs to the available compressor frequency value. At this time, the standard compressor frequency corresponding to the working condition in the non-reversing defrost frequency calculation model can be updated to the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode, that is, based on the target compressor frequency of the current non-reversing defrost mode, a frequency increase is performed, and the standard compressor frequency corresponding to the working condition in the non-reversing defrost frequency calculation model is updated according to the compressor frequency after the frequency increase, so that the next time the operation is carried out under the working condition, the operation test can be carried out according to the compressor frequency after the frequency increase, and then it can be determined whether the compressor frequency after the frequency increase can optimize the operating effect of the non-reversing defrost mode, so that the standard compressor frequency corresponding to the working condition in the non-reversing defrost frequency calculation model is further close to the optimal compressor frequency.

[0076] S457: When it is determined that the sum of the target compressor frequency of the current non-reversing defrost mode and the second frequency adjustment amount is outside the non-reversing defrost frequency allowable range, the corresponding standard compressor frequency in the non-reversing defrost frequency calculation model is not updated.

[0077] When it is determined that the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode is outside the allowable range of the non-reversing defrost frequency, it can be determined that the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode belongs to an unusable compressor frequency value, and therefore the corresponding standard compressor frequency in the non-reversing defrost frequency operation model is not updated based on the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode.

[0078] In some embodiments, the air conditioning device 1 may include a water side heat exchanger. Figure 7 As shown, after controlling the air-conditioning device 1 to enter the non-reversing defrost mode, the defrost control method may further include S461 to S464.

[0079] S461: Obtain the outlet water temperature and inlet water temperature of the water-side heat exchanger.

[0080] Here, the outlet water temperature of the water-side heat exchanger can be measured in real time by a temperature sensor provided at the refrigerant outlet of the water-side heat exchanger, or can be calculated and determined by other algorithms.

[0081] S462: Determine the inlet and outlet water temperature difference of the water-side heat exchanger based on the outlet water temperature and the inlet water temperature of the water-side heat exchanger. Here, the inlet and outlet water temperature difference of the water-side heat exchanger is determined by subtracting the outlet water temperature from the inlet water temperature.

[0082] S463: When the operation time of the non-reversing defrost mode does not reach the non-reversing defrost time threshold and the inlet and outlet water temperature difference of the water side heat exchanger is less than or equal to the inlet and outlet water temperature difference threshold, control the air conditioning device 1 to switch from the non-reversing defrost mode to the heating operation mode.

[0083] Here, the non-reversing defrost time threshold and the inlet and outlet water temperature difference threshold can be pre-set in the control system of the air-conditioning device 1, and are used to determine whether the non-reversing defrost mode can effectively eliminate the surface frost layer of the outdoor heat exchanger after the air-conditioning device 1 enters the non-reversing defrost mode. Before the operating time of the non-reversing defrost mode reaches the non-reversing defrost time threshold (including when the non-reversing defrost time threshold is just reached), if the inlet and outlet water temperature difference of the water-side heat exchanger is less than or equal to the inlet and outlet water temperature difference threshold, it indicates that the non-reversing defrost mode has effectively eliminated the surface frost layer of the outdoor heat exchanger, and the air-conditioning device 1 has completed the non-reversing defrost. At this time, the air-conditioning device 1 can be controlled to switch from the non-reversing defrost mode to the heating operation mode, so that the air-conditioning device 1 can operate according to the control logic of the heating operation mode again, so as to better meet the user's heating, domestic hot water supply and other usage needs.

[0084] S464: When the running time of the non-reversing defrost mode reaches the non-reversing defrost time threshold and the inlet and outlet water temperature difference of the water side heat exchanger is greater than the inlet and outlet water temperature difference threshold, control the air conditioning equipment 1 to switch from the non-reversing defrost mode to the reverse defrost mode.

[0085] When the operating time of the non-reversing defrost mode reaches the non-reversing defrost time threshold, if the inlet and outlet water temperature difference of the water-side heat exchanger is still greater than the inlet and outlet water temperature difference threshold, it indicates that the non-reversing defrost mode cannot effectively eliminate the surface frost layer of the outdoor heat exchanger, and the air conditioner 1 cannot complete the non-reversing defrost. In this case, the air conditioner 1 can be controlled to switch from the non-reversing defrost mode to the reverse defrost mode, which effectively eliminates the surface frost layer of the outdoor heat exchanger and improves the heat exchange energy efficiency of the outdoor heat exchanger.

[0086] By setting S461 to S464, after the air conditioner 1 enters the non-reversing defrost mode, it can be promptly determined whether the non-reversing defrost mode can effectively eliminate the frost layer on the surface of the outdoor heat exchanger, so that the air conditioner 1 can be further controlled according to the actual operating effect of the non-reversing defrost mode. When the non-reversing defrost mode has effectively eliminated the frost layer on the surface of the outdoor heat exchanger, the air conditioner 1 is promptly controlled to switch from the non-reversing defrost mode to the heating operation mode to quickly meet the user's heating needs. If the non-reversing defrost mode cannot effectively eliminate the frost layer on the surface of the outdoor heat exchanger, the air conditioner 1 is promptly controlled to switch from the non-reversing defrost mode to the reverse defrost mode to further eliminate the frost layer on the surface of the outdoor heat exchanger, thereby improving the operating energy efficiency and heating effect of the air conditioner 1.

[0087] In some embodiments, the defrost control method may further include S60 .

[0088] S60: When it is determined that the first frosting time is greater than the upper limit of the reference frosting time range, the air-conditioning device 1 is controlled to maintain the heating operation mode.

[0089] When it is determined that the first frosting time is greater than the upper limit of the reference frosting time range, it can be determined that the current actual outdoor environment is better than the standard outdoor environment, and the frosting speed of the outdoor heat exchanger is lower than the frosting speed corresponding to the non-reversing defrost mode, that is, the outdoor heat exchanger frosts slowly. At this time, the air-conditioning equipment 1 can be controlled to maintain the heating operation mode to avoid causing the heating effect of the air-conditioning equipment 1 to decrease, thereby avoiding fluctuations in the indoor ambient temperature.

[0090] In a second aspect, an embodiment of the present application provides a defrost control device, which includes: an acquisition circuit, configured to acquire the outdoor ambient temperature, the outdoor ambient humidity and the first frosting time, the first frosting time being the heating operation time before the outdoor heat exchanger reaches the non-reversing defrosting critical state; a reference range calculation circuit, configured to determine the reference frosting time range based on the outdoor ambient temperature and the outdoor ambient humidity; a comparison circuit, configured to determine whether the first frosting time is within the reference frosting time range; a non-reversing defrost circuit, configured to control the air-conditioning equipment 1 to enter the non-reversing defrost mode when it is determined that the first frosting time is within the reference frosting time range; and a reverse defrost circuit, configured to control the air-conditioning equipment 1 to enter the reverse defrost mode when it is determined that the first frosting time is less than the lower limit of the reference frosting time range.

[0091] like Figure 8 As shown, in the third aspect, an embodiment of the present application provides an air-conditioning device 1, which includes a processor 10 and a memory 20, and the memory 20 stores a computer program, which, when executed by the processor 10, implements a defrost control method as in any of the above embodiments.

[0092] The processor 10 is connected to the memory 20 and can perform various actions and processes according to the program stored in the memory 20. Specifically, the processor 10 can be an integrated circuit chip with signal processing capabilities. The above-mentioned processor 10 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can be an X86 architecture or an ARM architecture.

[0093] The memory 20 may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct memory bus random access memory (DRRAM). It should be noted that the memory 20 of the method described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0094] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. The computer program is loaded by the processor 10 to execute the steps in the control method of any of the above embodiments.

[0095] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical disks (e.g., CDs (Compact Disks), DVDs (Digital Versatile Disks), etc.), smart cards, and flash memory devices (e.g., EPROMs (Erasable Programmable Read-Only Memory), cards, sticks, or key drives, etc.). The various computer-readable storage media described in the embodiments of the present application may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0096] The above is a detailed introduction to a defrost control method, device, air-conditioning equipment and computer-readable storage medium provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A defrost control method, characterized in that: include: Acquiring an outdoor ambient temperature, an outdoor ambient humidity, and a first frosting time, wherein the first frosting time is a heating operation time before the outdoor heat exchanger reaches a critical state of non-reversing defrosting; determining a reference frosting time range according to the outdoor ambient temperature and the outdoor ambient humidity; determining whether the first frosting time is within the reference frosting time range; When it is determined that the first frosting time is within the reference frosting time range, controlling the air conditioning device to enter a non-reversing defrosting mode; When it is determined that the first frosting time is less than the lower limit of the reference frosting time range, the air conditioning device is controlled to maintain a heating operation mode, and when a reverse defrosting condition is met, the air conditioning device is controlled to enter a reverse defrosting mode.

2. The defrost control method according to claim 1, wherein: The air conditioning device includes a water-side heat exchanger; controlling the air conditioning device to enter a non-reversing defrost mode includes: Obtaining the water inlet temperature of the water-side heat exchanger; Determining the target compressor frequency of the non-reversing defrost mode based on the non-reversing defrost frequency calculation model and the outdoor ambient temperature and the water inlet temperature of the water-side heat exchanger; The operation of the compressor is controlled according to the target compressor frequency.

3. The defrost control method according to claim 2, wherein: Determining a target compressor frequency for the non-reversing defrost mode based on a non-reversing defrost frequency calculation model and according to the outdoor ambient temperature and the water inlet temperature of the water-side heat exchanger includes: Determining a standard compressor frequency in the non-reversing defrost frequency calculation model according to the outdoor ambient temperature and the water inlet temperature of the water-side heat exchanger; When the air-conditioning equipment enters the non-reversing defrost mode for the first time under certain operating conditions, the standard compressor frequency is used as the target compressor frequency of the non-reversing defrost mode, wherein the operating conditions include the outdoor ambient temperature and the inlet water temperature of the water-side heat exchanger; When the air-conditioning device enters the non-reversing defrost mode again under a certain working condition, the difference between the standard compressor frequency and the first frequency adjustment amount is used as the target compressor frequency of the non-reversing defrost mode.

4. The defrost control method according to claim 3, wherein: After controlling the air-conditioning device to enter the non-reversing defrost mode, the defrost control method further includes: When the air-conditioning apparatus performs non-reversing defrost again under certain operating conditions, determining a relationship between the operating time of the current non-reversing defrost mode and the operating time of the non-reversing defrost mode when the non-reversing defrost was last completed under the operating conditions, wherein the operating conditions include the outdoor ambient temperature and the water inlet temperature of the water-side heat exchanger; When it is determined that the running time of the current non-reversing defrost mode is less than the running time of the non-reversing defrost mode when the non-reversing defrost was last completed under the operating conditions, and the target compressor frequency of the current non-reversing defrost mode is within the allowable range of the non-reversing defrost frequency, updating the corresponding standard compressor frequency in the non-reversing defrost frequency calculation model according to the target compressor frequency of the current non-reversing defrost mode; When it is determined that the running time of the current non-reversing defrost mode is less than the running time of the non-reversing defrost mode when the non-reversing defrost was completed last time under the operating conditions, and the target compressor frequency of the current non-reversing defrost mode is outside the allowable range of the non-reversing defrost frequency, the corresponding standard compressor frequency in the non-reversing defrost frequency operation model is not updated.

5. The defrost control method according to claim 1, wherein: The defrost control method further includes: When it is determined that the running time of the current non-reversing defrost mode is greater than the running time of the non-reversing defrost mode when the non-reversing defrost was last completed under the operating conditions, the corresponding standard compressor frequency in the non-reversing defrost frequency calculation model is not updated; or When it is determined that the running time of the current non-reversing defrost mode is greater than the running time of the non-reversing defrost mode when the non-reversing defrost was last completed under the operating conditions, determining whether the sum of the target compressor frequency of the current non-reversing defrost mode and the second frequency adjustment amount is within the allowable range of the non-reversing defrost frequency; When it is determined that the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode is within the non-reversing defrost frequency allowable range, updating the corresponding standard compressor frequency in the non-reversing defrost frequency calculation model according to the sum of the target compressor frequency and the second frequency adjustment amount of the current non-reversing defrost mode; When it is determined that the sum of the target compressor frequency of the current non-reversing defrost mode and the second frequency adjustment amount is outside the non-reversing defrost frequency allowable range, the corresponding standard compressor frequency in the non-reversing defrost frequency calculation model is not updated.

6. The defrost control method according to claim 1, wherein: The air conditioning device includes a water-side heat exchanger; after controlling the air conditioning device to enter a non-reversing defrost mode, the defrost control method further includes: Obtaining the outlet water temperature and the inlet water temperature of the water side heat exchanger; Determining the inlet and outlet water temperature difference of the water side heat exchanger according to the outlet water temperature and the inlet water temperature of the water side heat exchanger; When the operation time of the non-reversing defrost mode does not reach the non-reversing defrost time threshold and the inlet and outlet water temperature difference of the water-side heat exchanger is less than or equal to the inlet and outlet water temperature difference threshold, controlling the air-conditioning device to switch from the non-reversing defrost mode to the heating operation mode; When the running time of the non-reversing defrost mode reaches the non-reversing defrost time threshold and the inlet and outlet water temperature difference of the water side heat exchanger is greater than the inlet and outlet water temperature difference threshold, the air conditioning equipment is controlled to switch from the non-reversing defrost mode to the reverse defrost mode.

7. The defrost control method according to claim 1, wherein: The defrost control method further includes: When it is determined that the first frosting time is greater than the upper limit of the reference frosting time range, the air conditioning device is controlled to maintain a heating operation mode.

8. A defrost control device, characterized in that: include: an acquisition circuit configured to acquire an outdoor ambient temperature, an outdoor ambient humidity, and a first frosting time, wherein the first frosting time is a heating operation time before the outdoor heat exchanger reaches a critical state of non-reversing defrosting; a reference range calculation circuit configured to determine a reference frosting time range according to the outdoor ambient temperature and the outdoor ambient humidity; a comparison circuit configured to determine whether the first frosting time is within the reference frosting time range; a non-reversing defrost circuit, configured to control the air conditioning device to enter a non-reversing defrost mode when determining that the first frosting time is within the reference frosting time range; The reverse defrost circuit is configured to control the air conditioning device to enter a reverse defrost mode when it is determined that the first frosting time is less than a lower limit of the reference frosting time range.

9. An air conditioning device, characterized in that: include: a memory storing a computer program; A processor, wherein when the computer program is executed by the processor, the defrost control method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in the defrost control method according to any one of claims 1 to 7.

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