Defrosting method and device of air conditioner, air conditioner and storage medium

Abstract

The invention relates to a defrosting method and device of an air conditioner, the air conditioner and a storage medium, and belongs to the technical field of air conditioner control. The method comprises the steps that it is recognized that the air conditioner needs to be defrosted, a compressor is controlled to enter a frequency-increasing heat storage process, and the frequency-increasing heat storage process comprises the steps that the compressor is controlled to be increased from the current operation frequency to the upper frequency limit, and the heat storage duration time threshold value is operated at the upper frequency limit; and when the accumulated heat storage operation duration of the air conditioner reaches the heat storage duration threshold value, the compressor is controlled to enter the defrosting process. Therefore, according to the scheme, the compressor is controlled to enter the frequency-increasing heat storage process before defrosting, and the situation that the air conditioner absorbs a large amount of heat from the indoor space during defrosting is avoided. And when the accumulated heat storage operation duration of the air conditioner reaches the heat storage duration threshold value, the compressor is controlled to enter the defrosting process, the defrosting reliability can be guaranteed, the defrosting capacity of the air conditioner is improved, and the thermal comfort in the defrosting period is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning control, and in particular to a defrosting method and device for an air conditioner, an air conditioner and a storage medium. Background Art

[0002] At present, the defrosting method of air conditioners is reverse cycle defrosting, that is, during defrosting, the system flow is switched from heating mode to cooling mode, and the compressor and refrigerant cycle are used to complete defrosting. The air conditioner needs to absorb heat from the room to achieve defrosting, resulting in a large drop in indoor temperature, which makes the user experience poor. Summary of the invention

[0003] The present application provides a defrosting method, device, air conditioner, computer-readable storage medium and computer program product for an air conditioner to solve the problem of sudden drop in indoor temperature during defrosting of the air conditioner. The technical solution of the present application is as follows:

[0004] According to a first aspect of an embodiment of the present application, a defrosting method for an air conditioner is provided, comprising: identifying that the air conditioner needs to be defrosted, and controlling the compressor to enter a frequency-upgrading heat storage process, wherein the frequency-upgrading heat storage process comprises: controlling the compressor to increase the frequency from the current operating frequency to a frequency upper limit, and operating at a heat storage duration threshold at the frequency upper limit; when the accumulated heat storage operating time of the air conditioner reaches the heat storage duration threshold, controlling the compressor to enter the defrosting process.

[0005] In one embodiment of the present application, the process of determining the heat storage duration threshold includes: obtaining an indoor ambient temperature and a first target temperature; obtaining a first temperature difference between the indoor ambient temperature and the first target temperature, and determining a target temperature range in which the first temperature difference is located; and determining the heat storage duration threshold based on the first target temperature range.

[0006] In one embodiment of the present application, after determining the target temperature range in which the first temperature difference is located, the method further includes: determining a temperature compensation value based on the target temperature range, and updating the first target temperature to a second target temperature based on the temperature compensation value.

[0007] In one embodiment of the present application, the method further includes: when entering the defrosting process, restoring from the second target temperature to the first target temperature.

[0008] In one embodiment of the present application, controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit includes: determining the current operating gear of the indoor fan of the air conditioner, and determining the frequency increase speed limit of the compressor based on the current operating gear; controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit at a frequency increase speed that is less than or equal to the frequency increase speed limit.

[0009] In one embodiment of the present application, the method also includes: obtaining the outdoor ambient temperature and the outer tube temperature of the air conditioner; based on the outdoor ambient temperature and the outer tube temperature, determining whether to adjust the heat storage duration threshold; if it is determined that the heat storage duration threshold needs to be adjusted, determining a time extension amount according to the outdoor ambient temperature and the outer tube temperature; and extending the heat storage duration threshold based on the time extension amount.

[0010] In one embodiment of the present application, the determination of whether to adjust the heat storage duration threshold based on the outdoor ambient temperature and the outer tube temperature includes: obtaining whether the outdoor ambient temperature is in one of the candidate temperature ranges, and if it is in one of the candidate temperature ranges, determining the defrost judgment temperature and the temperature compensation value corresponding to the outer tube temperature according to the candidate temperature range in which the outdoor ambient temperature is located; obtaining a target defrost judgment temperature of the outer tube temperature based on the defrost judgment temperature and the temperature compensation value; if the outer tube temperature is less than or equal to the target defrost judgment temperature, determining that the heat storage duration threshold needs to be adjusted.

[0011] In one embodiment of the present application, the method also includes: executing the up-frequency heat storage process and the defrost process in a cyclical manner; after each cycle is completed, judging whether the air conditioner meets the set frost-free judgment condition; if the frost-free judgment condition is met, lowering the defrost temperature threshold of each temperature interval in the next cycle, and / or shortening the heat storage duration threshold of each temperature interval in the up-frequency heat storage process.

[0012] In one embodiment of the present application, the determination of whether the air conditioner meets the set frost-free judgment condition includes: obtaining the first inner tube temperature at the end of the cycle execution and the second inner tube temperature when entering the defrost, and obtaining the second temperature difference between the first inner tube temperature and the second inner tube temperature; obtaining the first time length and the second time length required for the inlet temperature from the outdoor heat exchanger to increase to the first set temperature and the second set temperature respectively when entering the defrost, and obtaining the time interval between the first time length and the second time length, wherein the first set temperature is greater than the second set temperature; if the first temperature difference is greater than or equal to the set temperature difference threshold, and the time interval is less than the set time interval threshold, it is determined that the air conditioner meets the set frost-free judgment condition.

[0013] According to a second aspect of an embodiment of the present application, a defrost device for an air conditioner is provided, comprising: a first control module, for identifying that the air conditioner needs to be defrosted, and controlling the compressor to enter a frequency-upgrading heat storage process, wherein the frequency-upgrading heat storage process comprises: controlling the compressor to increase the frequency from the current operating frequency to a frequency upper limit, and operating at the frequency upper limit to a heat storage duration threshold; a second control module, for controlling the compressor to enter the defrost process when the accumulated heat storage operating time of the air conditioner reaches the heat storage duration threshold.

[0014] According to a third aspect of an embodiment of the present application, there is provided an air conditioner, comprising a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to implement the steps of the method of the first aspect of the embodiment of the present application.

[0015] According to a fourth aspect of an embodiment of the present application, a computer-readable storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the method of the first aspect of the embodiment of the present application are implemented.

[0016] According to a fifth aspect of an embodiment of the present application, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor of an air conditioner, the steps of the method of the first aspect of the embodiment of the present application are implemented.

[0017] The technical solution provided by the embodiment of the present application brings at least the following beneficial effects: by controlling the compressor to enter the frequency-increasing heat storage process before defrosting, it is possible to avoid the air conditioner absorbing a large amount of heat from the room during defrosting, thereby preventing the indoor temperature from dropping suddenly and improving the user experience. Furthermore, when the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process, which can ensure the reliability of defrosting, improve the defrosting capacity of the air conditioner, and further improve the thermal comfort during defrosting.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0020] Figure 1 The present invention is a flow chart showing a defrosting method of an air conditioner according to an exemplary embodiment.

[0021] Figure 2 The present invention is a flow chart of a defrosting method for an air conditioner according to another exemplary embodiment.

[0022] Figure 3The present invention is a flow chart of a defrosting method for an air conditioner according to another exemplary embodiment.

[0023] Figure 4 The present invention is a flow chart showing a defrosting method of an air conditioner according to another exemplary embodiment.

[0024] Figure 5 The present invention is a flow chart showing a defrosting method of an air conditioner according to another exemplary embodiment.

[0025] Figure 6 The present invention is a flow chart showing a defrosting method of an air conditioner according to another exemplary embodiment.

[0026] Figure 7 The present invention is a structural block diagram of a defrosting device of an air conditioner according to an exemplary embodiment.

[0027] Figure 8 is a block diagram of an air conditioner according to an exemplary embodiment.

[0028] Fig. 9 is a structural block diagram of an air conditioner according to an exemplary embodiment. DETAILED DESCRIPTION

[0029] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0031] The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of national laws and regulations.

[0032] Figure 1 is a flow chart of a defrosting method for an air conditioner according to an exemplary embodiment. Figure 1 As shown, the defrosting method of the air conditioner in the embodiment of the present application comprises the following steps:

[0033] S101, identifying that the air conditioner needs to be defrosted, and controlling the compressor to enter a frequency increase heat storage process, wherein the frequency increase heat storage process includes: controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit, and running at the upper frequency limit to meet the heat storage duration threshold.

[0034] It should be noted that the defrosting method for the air conditioner in the embodiment of the present application is performed by the air conditioner. Optionally, the air conditioner can be a wall-mounted air conditioner, a cabinet air conditioner, a ceiling air conditioner, a window air conditioner, a central air conditioner, etc. In the present application, the type of the air conditioner is not too limited. The defrosting method for the air conditioner in the embodiment of the present application can be performed by the control device of the air conditioner itself.

[0035] The defrosting method of the air conditioner provided in the embodiment of the present application is explained below with the air conditioner itself as the execution subject:

[0036] In some implementations, the air conditioner can identify whether the air conditioner needs defrosting based on its own temperature sensor. Optionally, the outdoor ambient temperature can be detected based on the temperature sensor, and the corresponding temperature threshold for defrosting can be determined according to the temperature range of the outdoor ambient temperature. If the outdoor ambient temperature is less than or equal to the defrosting temperature threshold, it is identified that the air conditioner needs defrosting.

[0037] In some implementations, when it is identified that the air conditioner needs to be defrosted, by controlling the compressor to enter the up-frequency heat storage process before entering the defrost process, it is possible to avoid the air conditioner absorbing a large amount of heat from the indoor room during the defrost period, causing a large drop in indoor temperature and affecting the user experience.

[0038] It can be understood that the frequency increase and heat storage process includes: controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit, and operating the heat storage duration threshold at the upper frequency limit.

[0039] In some implementations, during the frequency increase process of the compressor, due to the faster frequency increase speed, a large noise is generated, which affects the user. In order to reduce the noise generated during the frequency increase process of the compressor, the frequency increase speed of the compressor can be limited.

[0040] Optionally, the compressor can be controlled to increase the frequency from the current operating frequency to the upper frequency limit according to the set frequency increase speed limit. Optionally, the compressor can be controlled to increase the frequency from the current operating frequency to the upper frequency limit according to different frequency increase speed limits by setting different frequency increase durations. Among them, different frequency increase durations correspond to different frequency increase speed limits. Furthermore, the compressor can increase the frequency from the current operating frequency to the upper frequency limit at a frequency increase speed that is less than or equal to the frequency increase speed limit.

[0041] In some implementations, the heat storage duration threshold may be based on the difference between the indoor ambient temperature and the set temperature of the air conditioner. Optionally, a mapping relationship between the difference and the heat storage duration threshold may be pre-established, and after determining the size of the difference, the mapping relationship may be queried to obtain the heat storage duration threshold, thereby controlling the heat storage operation time of the compressor to be the heat storage duration threshold.

[0042] S102, when the accumulated heat storage operation time of the air conditioner reaches a heat storage duration threshold, the compressor is controlled to enter a defrosting process.

[0043] In some implementations, one or more timers may be set on the air conditioner to obtain the heat storage operation time of the air conditioner. The timing starts when the operating frequency of the compressor reaches the upper frequency limit, and when the timing duration is equal to the heat storage duration threshold, that is, the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process.

[0044] In the defrosting method for the air conditioner provided in the embodiment of the present application, by controlling the compressor to enter the frequency-increasing heat storage process before defrosting, the air conditioner can avoid absorbing a large amount of heat from the room during defrosting, thereby preventing the indoor temperature from dropping suddenly and improving the user experience. Furthermore, when the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process, which can ensure the reliability of defrosting, improve the defrosting capacity of the air conditioner, and further improve the thermal comfort during defrosting.

[0045] Figure 2 is a flow chart of a defrosting method for an air conditioner according to an exemplary embodiment. Figure 2 As shown, the defrosting method of the air conditioner in the embodiment of the present application comprises the following steps:

[0046] S201, obtaining indoor ambient temperature and a first target temperature.

[0047] In some implementations, one or more temperature sensors may be provided on the air conditioner to obtain the indoor ambient temperature, that is, the air conditioner may collect the indoor ambient temperature based on the temperature sensor installed on the air conditioner. In some implementations, the indoor ambient temperature may be collected by an indoor temperature sensor that is independent of the air conditioner and can communicate with the air conditioner, and the indoor ambient temperature may be collected by the indoor temperature sensor and sent to the air conditioner via a communication link with the air conditioner, such as Bluetooth communication. Since the indoor ambient temperature is separately provided indoors, the collected indoor ambient temperature may reflect the indoor environment more realistically. The present application does not make too many restrictions on the temperature sensor.

[0048] In some implementations, the first target temperature refers to the current set temperature of the air conditioner. Optionally, the air conditioner can determine the current set temperature of the air conditioner, that is, the first target temperature, according to the setting of the user based on the remote control or the control panel. Optionally, the default temperature of the air conditioner can also be used as the first target temperature.

[0049] S202: Acquire a first temperature difference between the indoor ambient temperature and a first target temperature, and determine a target temperature range within which the first temperature difference lies.

[0050] In some implementations, the first temperature difference is obtained by calculating the difference between the indoor ambient temperature and the first target temperature. In this application, the air conditioner is in heating mode, the indoor ambient temperature is lower than the first target temperature, and thus the first temperature difference between the indoor ambient temperature and the first target temperature is lower than 0.

[0051] Optionally, different temperature ranges may be pre-set, and after determining the first temperature difference, the target temperature range in which the first temperature difference is located may be determined. Assume that the first temperature difference between the indoor ambient temperature and the first target temperature is ΔT, and the temperature range is -1≤ΔT, -2≤ΔT<-1, ΔT<-2. For example, if the value of the first temperature difference ΔT is -3, then the target temperature range in which the first temperature difference is located is ΔT<-2.

[0052] In some implementations, in order to prevent the air conditioner from stopping operation between defrosting due to a sudden rise in the indoor ambient temperature to the first target temperature during the frequency increase and heat storage process of the compressor, thereby affecting the user experience, it is necessary to compensate for the first target temperature of the air conditioner so that the air conditioner can still enter the defrosting process when the indoor ambient temperature reaches the first target temperature.

[0053] Optionally, a temperature compensation value may be determined based on the target temperature range, and the first target temperature may be updated to the second target temperature based on the temperature compensation value. That is, the temperature compensation value is added to the first target temperature to obtain the second target temperature. Optionally, a mapping relationship between the target temperature range and the temperature compensation value may be established in advance, and the temperature compensation value may be obtained by querying the mapping relationship.

[0054] In this application, the mapping relationship between the target temperature range and the temperature compensation value is shown in Table 1 below.

[0055] ΔT Temperature compensation value -1≤ΔT <![CDATA[A1]]> -2≤ΔT<-1 <![CDATA[A2]]> ΔT<-2 /

[0056] Among them, the temperature compensation values ​​are all greater than 0, and A1>A2.

[0057] It should be noted that, in order to ensure the high efficiency of the air conditioner during the defrosting process, the air conditioner will cancel the compensation for the first target temperature when entering the defrosting process, that is, restore from the second target temperature to the first target temperature.

[0058] S203: Determine a heat storage duration threshold based on the first target temperature range.

[0059] In some implementations, different temperature ranges correspond to different heat storage duration thresholds. After determining the target temperature range, the heat storage duration threshold corresponding to the target temperature range can be determined by querying the mapping relationship based on the mapping relationship between the target temperature range and the heat storage duration threshold.

[0060] In the embodiment of the present application, the mapping relationship between the target temperature range and the heat storage duration threshold is shown in Table 2 below.

[0061] Table 2

[0062] ΔT <![CDATA[Thermal storage duration threshold t1]]> -1≤ΔT <![CDATA[t 11 ]]> -2≤ΔT<-1 <![CDATA[t 12 ]]> ΔT<-2 <![CDATA[t 13 ]]>

[0063] Among them, the heat storage duration threshold t 11 <t 12 <t 13 As can be seen from Table 2, the greater the first temperature difference between the indoor ambient temperature and the first target temperature, the longer the corresponding heat storage operation time of the air conditioner.

[0064] S204, identifying that the air conditioner needs to be defrosted, and controlling the compressor to enter a frequency-increasing heat storage process.

[0065] In the embodiment of the present application, the implementation method of step S204 can be implemented by any method in the embodiments of the present application, which is not limited here and will not be repeated.

[0066] S205: When the accumulated heat storage operation time of the air conditioner reaches a heat storage duration threshold, the compressor is controlled to enter a defrosting process.

[0067] In the embodiment of the present application, the implementation method of step S205 can be implemented by any method in the embodiments of the present application, which is not limited here and will not be repeated.

[0068] In the defrosting method for the air conditioner provided in the embodiment of the present application, by controlling the compressor to enter the frequency-increasing heat storage process before defrosting, the air conditioner can avoid absorbing a large amount of heat from the room during defrosting, so as to prevent the indoor temperature from dropping suddenly, thereby improving the user experience. According to the first temperature difference between the indoor ambient temperature and the first target temperature, the heat storage duration threshold of the air conditioner is determined, and when the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process, which can ensure the reliability of defrosting, improve the defrosting capacity of the air conditioner, and further improve the thermal comfort during defrosting.

[0069] Figure 3is a flow chart of a defrosting method for an air conditioner according to an exemplary embodiment. Figure 3 As shown, the defrosting method of the air conditioner in the embodiment of the present application comprises the following steps:

[0070] S301, identifying that the air conditioner needs to be defrosted, and controlling the compressor to enter a frequency-increasing heat storage process.

[0071] In the embodiment of the present application, the implementation method of step S301 can be implemented by any method in the embodiments of the present application, which is not limited here and will not be repeated.

[0072] S302, controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit, and operating the heat storage duration threshold at the upper frequency limit.

[0073] In some implementations, the compressor can be controlled to increase the frequency from the current operating frequency to the upper frequency limit based on the wind speed of the internal fan. Due to different wind speeds of the internal fan, the frequency increase speed of the compressor is different. In the embodiment of the present application, a mapping relationship between the wind speed of the internal fan and the frequency increase speed limit of the compressor can be established in advance. After the wind speed of the internal fan is determined, the mapping relationship can be queried to obtain the frequency increase speed limit of the compressor.

[0074] It is understandable that when the internal fan of the air conditioner is in a lower gear, the frequency of the corresponding compressor is also lower. During the frequency increase process of the compressor, due to the faster frequency increase speed, the internal fan makes noise, affecting the user experience. Therefore, it is necessary to determine the frequency increase speed limit of the compressor to limit the frequency increase speed of the compressor.

[0075] Optionally, the current operating gear of the indoor fan of the air conditioner can be determined, and based on the current operating gear, the frequency increase speed limit of the compressor can be determined. Then the compressor is controlled to increase from the current operating frequency to the upper frequency limit at a frequency increase speed that is less than or equal to the frequency increase speed limit. Among them, the indoor fan has 7 operating gears, which can be divided into: 1-2 gears, 3-4 gears, 5-7 gears, and the speed of the indoor fan gradually increases from 1 gear to 7 gears.

[0076] Optionally, a mapping relationship between the operating gear of the indoor fan and the frequency increase speed limit is established. After the current operating gear of the indoor fan is determined, the frequency increase speed limit of the compressor can be obtained by querying the mapping relationship.

[0077] In the embodiment of the present application, the mapping relationship between the operating gear of the internal fan and the frequency increase speed limit is shown in Table 3 below.

[0078] Table 3

[0079] Running gear Frequency increase speed limit V 1-2 <![CDATA[V1]]> 3rd-4th gear <![CDATA[V2]]> 5-7 <![CDATA[V3]]>

[0080] Among them, the frequency increase speed limit V1<V2<V3.

[0081] In the embodiment of the present application, the method for determining the heat storage duration threshold can be implemented by any of the methods in the various embodiments of the present application, which is not limited here and will not be repeated.

[0082] S303, when the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process.

[0083] In the embodiment of the present application, the implementation method of step S303 can be implemented by any method in the embodiments of the present application, which is not limited here and will not be repeated.

[0084] In the defrosting method of the air conditioner provided in the embodiment of the present application, by controlling the compressor to enter the frequency-up heat storage process before defrosting, the air conditioner can avoid absorbing a large amount of heat from the room during defrosting, so as to prevent the indoor temperature from dropping suddenly, thereby improving the user experience. The compressor can be controlled to increase the frequency from the current operating frequency to the upper frequency limit based on the internal fan gear of the air conditioner. Then, when the accumulated heat storage operating time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process, which can ensure the reliability of defrosting, improve the defrosting capacity of the air conditioner, and further improve the thermal comfort during defrosting.

[0085] Figure 4 is a flow chart of a defrosting method for an air conditioner according to an exemplary embodiment. Figure 4 As shown, the defrosting method of the air conditioner in the embodiment of the present application comprises the following steps:

[0086] S401, obtaining the outdoor environment temperature and the external pipe temperature of the air conditioner.

[0087] In some implementations, one or more temperature sensors may be provided on the air conditioner to obtain the outdoor ambient temperature and the temperature of the outer tube of the air conditioner, that is, the air conditioner may collect the outdoor ambient temperature and the temperature of the outer tube of the air conditioner based on the temperature sensors installed on the air conditioner. Optionally, a condenser tube temperature sensing package may be used to detect the temperature of the outer tube of the air conditioner. The present application does not impose too many restrictions on the temperature sensor.

[0088] S402: Based on the outdoor environment temperature and the external pipe temperature, it is determined whether to adjust the heat storage duration threshold.

[0089] In some implementations, multiple candidate temperature ranges for the outdoor ambient temperature may be preset, and different candidate temperature ranges may correspond to different candidate defrost determination temperatures for the external tube temperature. After determining the outdoor ambient temperature, the candidate temperature range in which the outdoor ambient temperature is located may be determined, and further, the target defrost determination temperature for the external tube temperature corresponding to the candidate temperature range may be determined.

[0090] Optionally, a mapping relationship between a candidate temperature range of the outdoor ambient temperature, the defrost determination temperature and the temperature compensation value may be established, and a target defrost determination temperature of the outer tube temperature corresponding to the candidate temperature range may be determined by querying the mapping relationship.

[0091] Optionally, by judging whether the acquired outdoor ambient temperature is in one of the candidate temperature ranges, if it is in one of the candidate temperature ranges, the above mapping relationship can be queried according to the candidate temperature range in which the outdoor ambient temperature is located, and the defrost determination temperature and temperature compensation value corresponding to the external pipe temperature can be determined. Among them, the temperature compensation value is a preset compensation value, and the defrost determination temperature refers to the external pipe temperature of the air conditioner entering the defrost state.

[0092] Further, based on the defrost determination temperature and the temperature compensation value, a target defrost determination temperature of the outer tube temperature is obtained, that is, the target defrost determination temperature is the difference between the defrost determination temperature and the temperature compensation value. If the outer tube temperature is less than or equal to the target defrost determination temperature, it is determined that the heat storage duration threshold needs to be adjusted.

[0093] In the embodiment of the present application, the mapping relationship between the candidate temperature range, the defrost judgment temperature and the temperature compensation value is shown in Table 4 below.

[0094] Table 4

[0095] <![CDATA[Outdoor ambient temperature T 外环 > <![CDATA[Outdoor pipe temperature T 外管 > <![CDATA[T1≤T 外环 ]]> <![CDATA[T 外管 ≤T 化霜判定温度1 -T 温度补偿值 ]]> <![CDATA[T2≤T 外环 <T1]]> <![CDATA[T 外管 ≤T 化霜判定温度2 -T 温度补偿值 ]]> <![CDATA[T3≤T 外环 <T2]]> <![CDATA[T 外管 ≤T 化霜判定温度3 -T 温度补偿值 ]]> <h2 style=";text-align:left;direction:ltr"><![CDATA[T4≤T <h2 style=";text-align:left;direction:ltr"> 外环 <h2 style=";text-align:left;direction:ltr"> <T3]]><h2 style=";text-align:left;direction:ltr"> <![CDATA[T 外管 ≤T 化霜判定温度4 -T 温度补偿值 ]]> <![CDATA[T5≤T 外环 <T4]]> <![CDATA[T 外管 ≤T 化霜判定温度5 -T 温度补偿值 ]]> <![CDATA[T 外环 <T5]]> <![CDATA[T 外管 ≤T 化霜判定温度6 -T 温度补偿值 ]]>

[0096] Among them, T 外环 is the outdoor ambient temperature, T 外管 is the outdoor pipe temperature, T1>T2>T3>T4>T5, T 温度补偿值 is the temperature compensation value, T 化霜判定温度 is the defrost judgment temperature, T 化霜判定温度1 -T 温度补偿值 It is the target defrost judgment temperature.

[0097] S403: If it is determined that the heat storage duration threshold needs to be adjusted, the time extension amount is determined according to the outdoor ambient temperature and the external pipe temperature.

[0098] In some implementations, the time extension amount of the heat storage duration threshold may be determined based on the candidate temperature range of the outdoor ambient temperature and the corresponding external pipe temperature. Optionally, different candidate temperature ranges may be set to correspond to the same time extension amount. Different candidate temperature ranges may also be set to correspond to different time extension amounts.

[0099] For example, the time extension amount corresponding to different candidate temperature ranges is Δt1. For another example, T1≤T 外环 The corresponding time extension is Δt11 , T2≤T 外环 <T1 corresponds to a time extension of Δt 12 , T3≤T 外环 <T2 corresponds to a time extension of Δt 13 , T4≤T 外环 <T3 corresponds to a time extension of Δt 14 , T5≤T 外环 <T4 corresponds to a time extension of Δt 15 , T 外环 <T5 corresponds to a time extension of Δt 16 . Among them, Δt 16 >Δt 15 >Δt 14 >Δt 13 >Δt 12 >Δt 11 .

[0100] S404: Extend the heat storage duration threshold based on the time extension amount.

[0101] S405, identifying that the air conditioner needs to be defrosted, and controlling the compressor to enter a frequency-increasing heat storage process.

[0102] In some implementations, after determining the time extension amount of the heat storage duration threshold, the time extension amount is added to the heat storage duration threshold to obtain the extended heat storage duration threshold, that is, the heat storage duration threshold is extended. Further, the air conditioner controls the compressor to perform frequency increase heat storage, controls the compressor to increase the frequency from the current operating frequency to the upper frequency limit, and operates at the extended heat storage duration threshold at the upper frequency limit.

[0103] For example, the heat storage duration threshold is determined as t according to the first temperature difference. 11 , and different candidate temperature ranges correspond to the same time extension Δt1, and then the heat storage duration threshold is extended to obtain the extended heat storage duration threshold t 11 +Δt1, controls the compressor to operate according to the upper frequency limit, and the heat storage time is t 11 +Δt1, in order to achieve the purpose of frequency increase and heat storage.

[0104] S406, when the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process.

[0105] In the embodiment of the present application, the implementation method of step S406 can be implemented by any method in the embodiments of the present application, which is not limited here and will not be repeated.

[0106] In the defrosting method for the air conditioner provided in the embodiment of the present application, by controlling the compressor to enter the frequency-increasing heat storage process before defrosting, the air conditioner can avoid absorbing a large amount of heat from the room during defrosting, so as to prevent the indoor temperature from dropping suddenly, thereby improving the user experience. Based on the outdoor ambient temperature and the external pipe temperature, the heat storage duration threshold is adjusted to reduce the impact of the outdoor environment on the air conditioner defrosting and improve the defrosting ability of the air conditioner. Furthermore, when the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process, which can ensure the reliability of defrosting and further improve the thermal comfort during defrosting.

[0107] Figure 5 is a flow chart of a defrosting method for an air conditioner according to an exemplary embodiment. Figure 5 As shown, the defrosting method of the air conditioner in the embodiment of the present application comprises the following steps:

[0108] S501, executing the frequency-up heat storage process and the defrosting process in a periodic cycle.

[0109] It is understandable that one frequency-up heat storage and one defrost process can be regarded as one cycle. The frequency-up heat storage and defrost processes are performed in a cyclical manner, that is, the frequency-up heat storage and defrost processes are performed repeatedly when the air conditioner is running.

[0110] For example, when the air conditioner recognizes that defrosting is required, it controls the compressor to enter the first frequency-upgrading heat storage process, and performs the first defrosting process after the frequency-upgrading heat storage process is completed. After defrosting is completed, that is, after a cycle is completed, the air conditioner recognizes again whether defrosting is required, and then controls the compressor to enter the second frequency-upgrading heat storage process, and performs the second defrosting process after the frequency-upgrading heat storage process is completed... After the i-th defrost is completed, the air conditioner recognizes again whether defrosting is required, and then controls the compressor to enter the i+1th frequency-upgrading heat storage process, and performs the i+1th defrosting process after the frequency-upgrading heat storage process is completed... until the air conditioner stops running.

[0111] S502, after each cycle is completed, determine whether the air conditioner meets the set frost-free judgment condition.

[0112] In some implementations, determining whether the air conditioner meets the set frost-free judgment condition can be whether the temperature difference between the first inner tube temperature when exiting defrost at the end of the cycle and the second inner tube temperature when entering defrost is greater than or equal to the set temperature difference threshold.

[0113] In some implementations, whether the air conditioner meets the set frost-free judgment condition can also be determined by whether the time interval required for the inlet temperature of the outdoor heat exchanger to rise to the first set temperature and the second set temperature respectively when entering the defrost state is less than the set time interval threshold.

[0114] Optionally, one or more temperature sensors may be provided on the air conditioner to obtain the inner tube temperature of the air conditioner, that is, the air conditioner may collect the inner tube temperature of the air conditioner based on the temperature sensors installed on the air conditioner. The present application does not make too many restrictions on the temperature sensor.

[0115] Optionally, one or more timers may be set on the air conditioner to obtain the inlet temperature of the outdoor heat exchanger of the air conditioner and the duration of increasing the set temperature. This application does not impose too many restrictions on the timer.

[0116] In some implementations, the first inner tube temperature at the end of the cycle execution and the second inner tube temperature when entering defrosting are obtained, and the second temperature difference between the first inner tube temperature and the second inner tube temperature is obtained. 内管1 , the temperature of the second inner tube is T 内管2 , then the second temperature difference is T 内管1 -T 内管2 .

[0117] In some implementations, the first time duration and the second time duration required for the inlet temperature of the outdoor heat exchanger to rise to the first set temperature and the second set temperature respectively when entering the defrost are obtained, and the time interval between the first time duration and the second time duration is obtained, wherein the first set temperature is greater than the second set temperature. Assume that the first time duration is t 温升1 , the second duration is t 温升2 , then the time interval is t 温升1 -t 温升2 .

[0118] Optionally, if the first temperature difference is greater than or equal to a set temperature difference threshold, and the time interval is less than a set time interval threshold, it is determined that the air conditioner meets the set frost-free determination condition. w , the time interval threshold is 20 seconds, if T 内管1 -T 内管2 ≥ΔT w , and t 温升1 -t 温升2 <20, confirm that the air conditioner meets the set frost-free judgment conditions.

[0119] S503: If the no-frost determination condition is met, lower the defrost temperature threshold of each temperature interval in the next cycle, and / or shorten the heat storage duration threshold of each temperature interval in the frequency-up heat storage process.

[0120] In some implementations, by determining that the air conditioner meets the frost-free determination condition, it can be determined that the air conditioner does not need to perform a defrost process at the current outdoor ambient temperature. Optionally, the air conditioner can be prevented from entering the defrost process by lowering the defrost temperature threshold corresponding to each temperature interval of the outdoor ambient temperature in the next cycle, and / or shortening the heat storage duration threshold of each temperature interval of the frequency-up heat storage process.

[0121] Optionally, the defrost temperature threshold corresponding to each temperature interval of the next cycle of outdoor ambient temperature can be reduced by setting a temperature correction value of the defrost temperature threshold. The temperature correction value is less than 0. The reduced defrost temperature threshold is obtained by adding the temperature correction value to the defrost temperature threshold. Optionally, the temperature correction value is ΔT 校正 , the temperature correction values ​​corresponding to each temperature interval can be the same or different.

[0122] Optionally, the time correction value of the heat storage duration threshold can be set to shorten the heat storage duration threshold of the outdoor ambient temperature in each temperature range in the frequency-up heat storage process. The time correction value is less than 0. The shortened heat storage duration threshold is obtained by adding the time correction value to the heat storage duration threshold. Optionally, the time correction value is Δt 校正 , the time correction values ​​corresponding to each temperature interval can be the same or different.

[0123] S504, identifying that the air conditioner needs to be defrosted, and controlling the compressor to enter a frequency-increasing heat storage process.

[0124] In the embodiment of the present application, the implementation method of step S504 can be implemented by any method in the embodiments of the present application, which is not limited here and will not be repeated.

[0125] S505: When the accumulated heat storage operation time of the air conditioner reaches a heat storage duration threshold, the compressor is controlled to enter a defrosting process.

[0126] In the embodiment of the present application, the implementation method of step S505 can be implemented by any method in the embodiments of the present application, which is not limited here and will not be repeated.

[0127] In the defrosting method for the air conditioner provided in the embodiment of the present application, the compressor is controlled to perform the frequency-upgrading heat storage process and the defrosting process according to the periodic cycle, which can avoid the air conditioner from absorbing a large amount of heat from the room during the defrosting period, so as to prevent the indoor temperature from dropping suddenly and improve the user experience. If it is determined that the air conditioner meets the set frost-free judgment condition, the defrosting temperature threshold of each temperature interval of the next cycle is lowered, and / or the heat storage duration threshold of each temperature interval of the frequency-upgrading heat storage process is shortened to avoid entering the defrosting process. When it is identified that the air conditioner needs to be defrosted, the compressor is controlled to enter the frequency-upgrading heat storage process. When the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process, which can ensure the reliability of defrosting, improve the defrosting capacity of the air conditioner, and further improve the thermal comfort during defrosting.

[0128] Figure 6 is a flow chart of a defrosting method for an air conditioner according to an exemplary embodiment. Figure 6 As shown, the defrosting method of the air conditioner in the embodiment of the present application comprises the following steps:

[0129] S601, identifying that the air conditioner needs to be defrosted, and controlling the compressor to enter a frequency-increasing heat storage process.

[0130] S602: Acquire the indoor environment temperature and the first target temperature.

[0131] S603: Acquire a first temperature difference between the indoor ambient temperature and the first target temperature, and determine a target temperature range within which the first temperature difference lies.

[0132] S604: Determine a heat storage duration threshold based on the first target temperature range.

[0133] S605, determining the current operating gear of the indoor fan of the air conditioner, and based on the current operating gear, determining the frequency increase speed limit of the compressor.

[0134] S606, controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit at a frequency increase speed that is less than or equal to the frequency increase speed limit.

[0135] S607: When the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process.

[0136] In the defrosting method for the air conditioner provided in the embodiment of the present application, by controlling the compressor to enter the frequency-increasing heat storage process before defrosting, the air conditioner can avoid absorbing a large amount of heat from the room during defrosting, thereby preventing the indoor temperature from dropping suddenly and improving the user experience. Furthermore, when the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process, which can ensure the reliability of defrosting, improve the defrosting capacity of the air conditioner, and further improve the thermal comfort during defrosting.

[0137] This application Figure 7 1 is a structural block diagram of a defrosting device for an air conditioner according to an exemplary embodiment. Figure 7 The defrosting device 700 of the air conditioner according to the embodiment of the present application includes: a first control module 701 and a second control module 702 .

[0138] The first control module 701 is used to identify that the air conditioner needs to be defrosted, and control the compressor to enter a frequency increase heat storage process, wherein the frequency increase heat storage process includes: controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit, and running the heat storage duration threshold at the upper frequency limit.

[0139] The second control module 702 is used to control the compressor to enter the defrosting process when the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold.

[0140] In one embodiment of the present application, the first control module 701 is further used to: obtain the indoor ambient temperature and the first target temperature; obtain a first temperature difference between the indoor ambient temperature and the first target temperature, and determine a target temperature range within which the first temperature difference lies; and determine the heat storage duration threshold based on the first target temperature range.

[0141] In one embodiment of the present application, the first control module 701 is further used to: determine a temperature compensation value based on the target temperature range, and update the first target temperature to a second target temperature based on the temperature compensation value.

[0142] In one embodiment of the present application, the first control module 701 is further configured to: restore from the second target temperature to the first target temperature when entering the defrosting process.

[0143] In one embodiment of the present application, the first control module 701 is further used to: determine the current operating gear of the indoor fan of the air conditioner, and based on the current operating gear, determine the frequency increase speed limit of the compressor; control the compressor to increase from the current operating frequency to the frequency upper limit at a frequency increase speed that is less than or equal to the frequency increase speed limit.

[0144] In one embodiment of the present application, the first control module 701 is further used to: obtain the outdoor ambient temperature and the outer tube temperature of the air conditioner; determine whether to adjust the heat storage duration threshold based on the outdoor ambient temperature and the outer tube temperature; if it is determined that the heat storage duration threshold needs to be adjusted, determine a time extension amount based on the outdoor ambient temperature and the outer tube temperature; and extend the heat storage duration threshold based on the time extension amount.

[0145] In one embodiment of the present application, the first control module 701 is further used to: obtain whether the outdoor ambient temperature is in one of the candidate temperature ranges; if it is in one of the candidate temperature ranges, determine the defrost judgment temperature and temperature compensation value corresponding to the outer tube temperature according to the candidate temperature range in which the outdoor ambient temperature is located; obtain a target defrost judgment temperature of the outer tube temperature based on the defrost judgment temperature and the temperature compensation value; if the outer tube temperature is less than or equal to the target defrost judgment temperature, determine that the heat storage duration threshold needs to be adjusted.

[0146] In one embodiment of the present application, the first control module 701 is also used to: execute the up-frequency heat storage process and the defrost process in a cyclical manner; after each cycle is completed, determine whether the air conditioner meets the set frost-free judgment condition; if the frost-free judgment condition is met, lower the defrost temperature threshold of each temperature interval in the next cycle, and / or shorten the heat storage duration threshold of each temperature interval in the up-frequency heat storage process.

[0147] In one embodiment of the present application, the first control module 701 is also used to: obtain the first inner tube temperature at the end of the cycle execution and the second inner tube temperature when entering the defrost, and obtain the second temperature difference between the first inner tube temperature and the second inner tube temperature; obtain the first time and the second time required for the inlet temperature from the outdoor heat exchanger to increase to the first set temperature and the second set temperature respectively when entering the defrost, and obtain the time interval between the first time and the second time, wherein the first set temperature is greater than the second set temperature; if the first temperature difference is greater than or equal to the set temperature difference threshold, and the time interval is less than the set time interval threshold, it is determined that the air conditioner meets the set frost-free judgment conditions.

[0148] In the defrosting method for the air conditioner provided in the embodiment of the present application, by controlling the compressor to enter the frequency-increasing heat storage process before defrosting, the air conditioner can avoid absorbing a large amount of heat from the room during defrosting, thereby preventing the indoor temperature from dropping suddenly and improving the user experience. Furthermore, when the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process, which can ensure the reliability of defrosting, improve the defrosting capacity of the air conditioner, and further improve the thermal comfort during defrosting.

[0149] Figure 8 is a block diagram of an air conditioner according to an exemplary embodiment. Figure 8 The air conditioner shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0150] like Figure 8As shown, the air conditioner 800 includes a processor 801, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 802 or a program loaded from a memory 806 to a random access memory (RAM) 803. In the RAM 803, various programs and data required for the operation of the air conditioner 800 are also stored. The processor 801, the ROM 802, and the RAM 803 are connected to each other through a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0151] The following components are connected to the I / O interface 805: a memory 806 including a hard disk, etc.; and a communication part 807 including a network interface card such as a local area network (LAN) card, a modem, etc., and the communication part 807 performs communication processing via a network such as the Internet; a drive 808 is also connected to the I / O interface 805 as needed.

[0152] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 807. When the computer program is executed by the processor 801, the above-mentioned functions defined in the method of the present application are executed.

[0153] In an exemplary embodiment, a storage medium including instructions is also provided, such as a memory including instructions, and the instructions can be executed by the processor 1001 of the air conditioner 1000 to complete the above method. Optionally, the storage medium can be a non-transitory computer-readable storage medium, for example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0154] In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, apparatus, or device. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0155] Fig. 9 is a structural block diagram of an air conditioner according to an exemplary embodiment. Fig. 9 The air conditioner shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application. Fig. 9 As shown, the air conditioner 900 includes a processor 901 and a memory 902. The memory 902 is used to store program codes, and the processor 901 is connected to the memory 902 and is used to read the program codes from the memory 902 to implement the defrosting method of the air conditioner in the above embodiment.

[0156] Optionally, the number of processors 901 may be one or more.

[0157] Optionally, the air conditioner may further include an interface 903, and the number of the interface 903 may be multiple. The interface 903 may be connected to an application program and may receive data from an external device such as a sensor.

[0158] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0159] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A defrosting method for an air conditioner, characterized in that: The method comprises: Identify that the air conditioner needs to be defrosted, and control the compressor to enter a frequency-increasing heat storage process, wherein the frequency-increasing heat storage process includes: controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit, and running the heat storage duration threshold at the upper frequency limit; When the accumulated heat storage operation time of the air conditioner reaches the heat storage duration threshold, the compressor is controlled to enter the defrosting process.

2. The method according to claim 1, characterized in that The process of determining the heat storage duration threshold comprises: Obtaining the indoor ambient temperature and the first target temperature; Acquire a first temperature difference between the indoor ambient temperature and the first target temperature, and determine a target temperature range within which the first temperature difference lies; The heat storage duration threshold is determined based on the first target temperature range.

3. The method according to claim 2, characterized in that After determining the target temperature range where the first temperature difference is located, the method further includes: Based on the target temperature range, a temperature compensation value is determined, and based on the temperature compensation value, the first target temperature is updated to a second target temperature.

4. The method according to claim 3, characterized in that The method further comprises: When entering the defrosting process, the second target temperature is restored to the first target temperature.

5. The method according to claim 1, characterized in that The step of controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit includes: Determining a current operating gear of an indoor fan of the air conditioner, and determining a frequency increase speed limit of the compressor based on the current operating gear; The compressor is controlled to increase the frequency from the current operating frequency to the upper frequency limit at a frequency increase speed that is less than or equal to the frequency increase speed limit.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: Obtaining the outdoor ambient temperature and the external pipe temperature of the air conditioner; Based on the outdoor environment temperature and the external pipe temperature, determining whether to adjust the heat storage duration threshold; If it is determined that the heat storage duration threshold needs to be adjusted, determining the time extension amount according to the outdoor ambient temperature and the external pipe temperature; The heat storage duration threshold is extended based on the time extension amount.

7. The method according to claim 6, characterized in that The determining whether to adjust the heat storage duration threshold based on the outdoor ambient temperature and the external pipe temperature includes: Obtaining whether the outdoor ambient temperature is within one of the candidate temperature ranges, and if so, determining the defrost determination temperature and the temperature compensation value corresponding to the external tube temperature according to the candidate temperature range within which the outdoor ambient temperature is located; Based on the defrost determination temperature and the temperature compensation value, obtaining a target defrost determination temperature of the outer tube temperature; If the outer tube temperature is less than or equal to the target defrosting determination temperature, it is determined that the heat storage duration threshold needs to be adjusted.

8. The method according to claim 6, characterized in that The method further comprises: Executing the frequency-increasing heat storage process and the defrosting process in a periodic cycle; After each cycle is completed, determining whether the air conditioner meets the set frost-free determination condition; If the no-frost determination condition is met, the defrost temperature threshold of each temperature interval in the next cycle is lowered, and / or the heat storage duration threshold of each temperature interval in the frequency-up heat storage process is shortened.

9. The method according to claim 7, characterized in that: The step of judging whether the air conditioner meets the set frost-free determination condition comprises: Acquire a first inner tube temperature at the end of a cycle and a second inner tube temperature when entering defrosting, and acquire a second temperature difference between the first inner tube temperature and the second inner tube temperature; Obtaining a first time duration and a second time duration required for the inlet temperature of the outdoor heat exchanger to rise to a first set temperature and a second set temperature respectively when entering the defrost state, and obtaining a time interval between the first time duration and the second time duration, wherein the first set temperature is greater than the second set temperature; If the first temperature difference is greater than or equal to a set temperature difference threshold, and the time interval is less than a set time interval threshold, it is determined that the air conditioner meets the set frost-free determination condition.

10. A defrosting device for an air conditioner, characterized in that: The device comprises: A first control module is used to identify that the air conditioner needs to be defrosted, and control the compressor to enter a frequency increase heat storage process, wherein the frequency increase heat storage process includes: controlling the compressor to increase the frequency from the current operating frequency to the upper frequency limit, and running the heat storage duration threshold at the upper frequency limit; The second control module is used to control the compressor to enter the defrosting process when the accumulated heat storage running time of the air conditioner reaches the heat storage duration threshold.

11. An air conditioner, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to implement the steps of the method according to any one of claims 1 to 9.

12. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the steps of the method described in any one of claims 1 to 9 are implemented.

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