Air conditioner defrosting control method, device, air conditioner and storage medium

Abstract

The present disclosure relates to the field of air conditioning, and in particular to an air conditioning defrosting control method, device, air conditioner and storage medium. The method comprises: when the air conditioner is in heating mode, monitoring the temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner; in response to determining that the air conditioner is in a low-frequency operation state, determining whether to turn on the air conditioner defrosting according to the temperature parameters and the first defrosting start judgment condition corresponding to the low-frequency operation state, wherein the low-frequency operation state is a state in which the operation frequency is lower than the preset operation frequency threshold for a continuous time that reaches the preset low-frequency operation time. In this way, when the air conditioner is in heating mode and operates at a low frequency for a long time, when the air conditioner is frosted, the air conditioner defrosting can be turned on accurately and timely to avoid affecting the heating effect of the air conditioner, thereby improving the user experience.

Description

Technical Field

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

[0002] With the popularity of air conditioners, people's requirements for comfort when using air conditioners are getting higher and higher. In order to prevent the compressor sound and refrigerant sound generated by the high-frequency operation of the compressor from entering the room, the industry usually corrects the upper frequency limit of different windshields. When the air conditioner is in heating mode and runs at a lower windshield, the operating frequency of the air conditioner compressor is limited to a lower frequency.

[0003] When the air conditioner compressor operates at a low frequency for a long time, the air conditioner's heating capacity is low, the indoor coil temperature is lower than normal, and the outdoor coil temperature is higher than normal. The outdoor coil temperature may be higher than the defrost condition, but lower than the air dew point temperature, resulting in frost. If the air conditioner compressor operates at a low frequency for a long time, even if the air conditioner is frosted and frozen, the outdoor coil temperature may still not be able to drop to the preset value that triggers the defrost program, resulting in the air conditioner being unable to start defrosting, which will in turn cause the air conditioner's heating capacity to decay, reducing the user experience. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides an air conditioner defrost control method, device, air conditioner and storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided an air conditioner defrosting control method, comprising:

[0006] When the air conditioner is in a heating mode, monitoring temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner;

[0007] In response to determining that the air conditioner is in a low-frequency operation state, whether to turn on the air conditioner defrost is determined based on the temperature parameter and the first defrost start judgment condition corresponding to the low-frequency operation state, wherein the low-frequency operation state is a state in which the operating frequency is lower than a preset operating frequency threshold for a duration that reaches a preset low-frequency operation duration.

[0008] Optionally, the temperature parameters include outdoor coil temperature, exhaust temperature and outdoor ambient temperature; and the first defrost start judgment condition includes:

[0009] The duration for which the outdoor coil temperature is not greater than the defrost temperature threshold corresponding to the outdoor ambient temperature reaches a first preset duration, and the maximum difference in exhaust temperature within a second preset time from the current moment is not less than the exhaust temperature difference threshold corresponding to the outdoor ambient temperature.

[0010] Optionally, if the outdoor ambient temperature is lower than a first temperature threshold, the first defrost start judgment condition further includes:

[0011] The duration during which the difference between the outdoor ambient temperature and the outdoor coil temperature is not less than a defrosting temperature difference threshold corresponding to the outdoor ambient temperature reaches the first preset duration.

[0012] Optionally, there is a positive correlation between the defrost temperature threshold and the outdoor ambient temperature.

[0013] Optionally, determining that the air conditioner is in a low-frequency operation state includes:

[0014] Determining, according to the outdoor ambient temperature, a low-frequency operation duration corresponding to the outdoor ambient temperature;

[0015] If the duration during which the operating frequency of the air conditioner is lower than the operating frequency threshold reaches a low-frequency operating duration corresponding to the outdoor ambient temperature, it is determined that the air conditioner is in the low-frequency operating state.

[0016] Optionally, the low-frequency operation duration is negatively correlated with the outdoor ambient temperature.

[0017] Optionally, the temperature parameter further includes indoor ambient temperature and indoor coil temperature; and the first defrost start judgment condition further includes:

[0018] The maximum difference of the indoor coil temperature within the second preset time period from the current moment is not greater than the indoor coil temperature difference threshold corresponding to the indoor ambient temperature.

[0019] Optionally, the indoor coil temperature difference threshold value is positively correlated with the indoor ambient temperature.

[0020] Optionally, the method further comprises:

[0021] In response to determining that the air conditioner is not in the low-frequency operation state, it is determined whether to turn on the air conditioner defrost according to the temperature parameter and a corresponding second defrost turn-on judgment condition in the normal operation state.

[0022] Optionally, the defrost temperature threshold corresponding to the same outdoor ambient temperature in the first defrost start judgment condition is smaller than the defrost temperature threshold corresponding to the second defrost start judgment condition; and / or the defrost temperature difference threshold corresponding to the same outdoor ambient temperature in the first defrost start judgment condition is smaller than the defrost temperature difference threshold corresponding to the second defrost start judgment condition.

[0023] According to a second aspect of an embodiment of the present disclosure, there is provided an air conditioner defrost control device, comprising:

[0024] A monitoring module, used for monitoring temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner when the air conditioner is in a heating mode;

[0025] The first determination module is used to determine whether to turn on the air conditioner defrost in response to determining that the air conditioner is in a low-frequency operation state, according to the temperature parameter and the first defrost start judgment condition corresponding to the low-frequency operation state, wherein the low-frequency operation state is a state in which the operating frequency is lower than a preset operating frequency threshold and the duration reaches a preset low-frequency operation duration.

[0026] According to a third aspect of an embodiment of the present disclosure, there is provided an air conditioner, comprising:

[0027] processor;

[0028] a memory for storing processor-executable instructions;

[0029] Wherein, the processor is configured to execute the steps of the air conditioner defrost control method provided in the first aspect of the present disclosure.

[0030] According to a fourth aspect of an embodiment of the present disclosure, 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 air conditioner defrost control method provided in the first aspect of the present disclosure are implemented.

[0031] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0032] When the air conditioner is in heating mode, the current operating state of the air conditioner can be determined by monitoring the temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner. If it is determined that the air conditioner is in a low-frequency operation state, whether to turn on the air conditioner defrost is determined based on the temperature parameters and the first defrost start judgment condition corresponding to the low-frequency operation state. That is, when the air conditioner is in long-term low-frequency operation, it can be combined with the temperature parameters related to the operation of the air conditioner to determine whether the air conditioner is frosted, and then it can be determined whether to turn on the air conditioner defrost. In this way, when the air conditioner is in heating mode and has been running at a low frequency for a long time, when the air conditioner is frosted, the air conditioner defrost can be turned on accurately and timely to avoid affecting the heating effect of the air conditioner, thereby improving the user experience.

[0033] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0035] Figure 1 The figure is a flow chart of an air conditioner defrosting control method according to an exemplary embodiment.

[0036] Figure 2 The figure is a block diagram of an air conditioner defrost control device according to an exemplary embodiment.

[0037] Figure 3 is a block diagram of an air conditioner according to an exemplary embodiment. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0039] It should be noted that all actions of acquiring signals, information or data in this application are carried out in compliance with the relevant data protection laws and policies of the country where they are located, and with the authorization given by the owner of the corresponding device.

[0040] Figure 1 FIG. 1 is a flow chart of an air conditioner defrosting control method according to an exemplary embodiment. The method can be applied to an air conditioner controller. Figure 1 As shown, the method may include S101 to S102.

[0041] S101, when the air conditioner is in a heating mode, monitoring temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner.

[0042] For example, the operating frequency of the air conditioner can be obtained through a frequency sensor set on the air conditioner compressor. The temperature parameters related to the air conditioner can be obtained through temperature sensors pre-set at positions such as the outdoor coil and indoor coil of the air conditioner. In this way, the current operating state of the air conditioner can be determined by monitoring the temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner, so as to provide data support for subsequent air conditioner control.

[0043] S102 In response to determining that the air conditioner is in a low-frequency operation state, determining whether to turn on the air conditioner defrost according to the temperature parameter and the first defrost start judgment condition corresponding to the low-frequency operation state.

[0044] The low-frequency operation state is a state in which the operation frequency is lower than a preset operation frequency threshold value for a duration that reaches a preset low-frequency operation duration.

[0045] Exemplarily, the operating frequency threshold can be preset. For example, if the operating frequency of the air conditioner is 10 Hz to 100 Hz, the operating frequency threshold can be set to 75 Hz; the preset low-frequency operation time can be set to 90 minutes. If the operating frequency of the air conditioner is lower than 75 Hz for a continuous time of 90 minutes, it can be determined that the air conditioner is in a long-term low-frequency operation, that is, it can be determined that the air conditioner is in a low-frequency operation state. If the temperature parameter meets the first defrost start judgment condition corresponding to the low-frequency operation state, it can be determined to turn on the air conditioner defrost; if the temperature parameter does not meet the first defrost start judgment condition corresponding to the low-frequency operation state, it can be determined not to turn on the air conditioner defrost. When the air conditioner is in a long-term low-frequency operation, it can be determined whether the air conditioner is frosted in combination with the temperature parameters related to the operation of the air conditioner, and then it can be determined whether to turn on the air conditioner defrost. In this way, when the air conditioner is in the heating mode and is in a long-term low-frequency operation, when the air conditioner is frosted, the air conditioner defrost can be turned on accurately and timely to avoid affecting the heating effect of the air conditioner, thereby improving the user experience.

[0046] Through the above technical solution, when the air conditioner is in the heating mode, the current operating state of the air conditioner can be determined by monitoring the temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner. If it is determined that the air conditioner is in a low-frequency operation state, whether to turn on the air conditioner defrost is determined based on the temperature parameters and the first defrost start judgment condition corresponding to the low-frequency operation state, that is, when the air conditioner is in a long-term low-frequency operation, it can be combined with the temperature parameters related to the operation of the air conditioner to determine whether the air conditioner is frosted, and then it can be determined whether to turn on the air conditioner defrost. In this way, when the air conditioner is in the heating mode and has been in a long-term low-frequency operation, when the air conditioner is frosted, the air conditioner defrost can be turned on accurately and timely to avoid affecting the heating effect of the air conditioner, thereby improving the user experience.

[0047] Optionally, the temperature parameters may include outdoor coil temperature, exhaust temperature and outdoor ambient temperature; the first defrost start judgment condition may include:

[0048] The duration during which the outdoor coil temperature is not greater than the defrost temperature threshold corresponding to the outdoor ambient temperature reaches a first preset duration, and the maximum difference in exhaust temperature within a second preset time from the current moment is not less than the exhaust temperature difference threshold corresponding to the outdoor ambient temperature.

[0049] For example, the outdoor ambient temperature can be obtained by a temperature sensor arranged outdoors; a temperature sensor can be arranged on the compressor exhaust pipe of the air conditioner at a certain distance from the exhaust port to obtain the exhaust temperature; and the outdoor coil temperature can be obtained by a temperature sensor arranged on the outdoor coil.

[0050] Specifically, the duration for which the outdoor coil temperature is not greater than the defrost temperature threshold corresponding to the outdoor ambient temperature reaches a first preset duration may include:

[0051] The outdoor ambient temperature is greater than or equal to the first temperature threshold, and the duration during which the outdoor coil temperature is not greater than the first defrosting temperature threshold reaches a first preset duration; or,

[0052] The outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, and the duration for which the outdoor coil temperature is not greater than the second defrosting temperature threshold reaches a first preset duration; or,

[0053] The outdoor ambient temperature is greater than or equal to the third temperature threshold and less than the second temperature threshold, and the duration for which the outdoor coil temperature is not greater than the third defrosting temperature threshold reaches a first preset duration; or,

[0054] The outdoor ambient temperature is lower than the third temperature threshold and the outdoor coil temperature is lower than the fourth defrosting temperature threshold for a duration that reaches a first preset duration.

[0055] Among them, there is a positive correlation between the defrost temperature threshold and the outdoor ambient temperature.

[0056] Exemplarily, the first preset duration can be preset, for example, can be set to 3 minutes. The first temperature threshold can be preset to 0°C; the second temperature threshold can be preset to -5°C, and the third temperature threshold can be preset to -10°C. The first defrost temperature threshold can be preset to -4.5°C, the second defrost temperature threshold can be preset to -6°C, the third defrost temperature threshold can be preset to -10°C, and the fourth defrost temperature threshold can be preset to -13°C. If the duration of the outdoor coil temperature not being greater than the defrost temperature threshold corresponding to the outdoor ambient temperature reaches the first preset duration, it can be determined that the air conditioner is currently in a stable operating state, thereby avoiding the air conditioner from being mistakenly turned on for defrosting.

[0057] Specifically, the maximum difference of the exhaust temperature within the second preset time period from the current moment to the present moment is not less than the exhaust temperature difference threshold value corresponding to the outdoor ambient temperature, which may include:

[0058] The outdoor ambient temperature is greater than or equal to the first temperature threshold, and the maximum difference in exhaust temperature within a second preset time period from the current moment is not less than the first exhaust temperature difference threshold; or,

[0059] The outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, and the maximum difference in exhaust temperature within a second preset time period from the current moment is not less than the second exhaust temperature difference threshold; or,

[0060] The outdoor ambient temperature is greater than or equal to the third temperature threshold and less than the second temperature threshold, and the maximum difference in exhaust temperature within a second preset time period from the current moment is not less than the third exhaust temperature difference threshold; or,

[0061] The outdoor ambient temperature is lower than the third temperature threshold, and the maximum difference in exhaust temperature within a second preset time period from the current moment is not lower than a fourth exhaust temperature difference threshold.

[0062] Among them, the first exhaust temperature difference threshold is not less than the second exhaust temperature difference threshold, the second exhaust temperature difference threshold is not less than the third exhaust temperature difference threshold, and the third exhaust temperature difference threshold is not less than the fourth exhaust temperature difference threshold.

[0063] Exemplarily, the first exhaust temperature difference threshold value may be preset to 5°C, the second exhaust temperature difference threshold value may be preset to 4°C, the third exhaust temperature difference threshold value may be preset to 4°C, and the fourth exhaust temperature difference threshold value may be preset to 3°C. The second preset duration may be set to 10 minutes. If the air conditioner is in a low-frequency operation state, and the current moment is the 60th minute when the air conditioner operation frequency is lower than the preset operation frequency threshold value, the maximum difference in exhaust temperature from the 50th minute to the 60th minute may be determined; if the current moment is the 61st minute when the air conditioner operation frequency is lower than the preset operation frequency threshold value, the maximum difference in exhaust temperature from the 51st minute to the 61st minute may be determined. In this way, by determining the maximum difference in exhaust temperature within the second preset duration from the current moment forward, the maximum variation range of the exhaust temperature within a certain duration may be determined to reflect the attenuation of the exhaust temperature of the air conditioner after the air conditioner has been running stably at a low frequency for a period of time.

[0064] In this way, the maximum difference between the outdoor coil temperature and the exhaust temperature in the second preset time period from the current moment can be used to determine whether the air conditioner is likely to frost and freeze. When the duration of the outdoor coil temperature being lower than the defrost temperature threshold corresponding to the outdoor ambient temperature reaches the first preset time period, and the maximum difference in exhaust temperature in the second preset time period from the current moment is not less than the exhaust temperature difference threshold corresponding to the outdoor ambient temperature, it can be determined that the air conditioner is frosted, and then the air conditioner defrost can be turned on, so that when the air conditioner is in heating mode and has been running at a low frequency for a long time, when the air conditioner is frosted, the air conditioner defrost can be turned on accurately and timely to avoid affecting the heating effect of the air conditioner, thereby improving the user experience.

[0065] Furthermore, if the outdoor ambient temperature is lower than the first temperature threshold, the first defrost start judgment condition may further include:

[0066] The duration during which the difference between the outdoor ambient temperature and the outdoor coil temperature is not less than the defrosting temperature difference threshold corresponding to the outdoor ambient temperature reaches a first preset duration.

[0067] Specifically, the duration for which the difference between the outdoor ambient temperature and the outdoor coil temperature is not less than the defrosting temperature difference threshold corresponding to the outdoor ambient temperature reaches a first preset duration may include:

[0068] The outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, and the difference between the outdoor ambient temperature and the outdoor coil temperature is not less than the first defrosting temperature difference threshold for a duration reaching a first preset duration; or,

[0069] The outdoor ambient temperature is greater than or equal to the third temperature threshold and less than the second temperature threshold, and the difference between the outdoor ambient temperature and the outdoor coil temperature is not less than the second defrosting temperature difference threshold for a duration reaching a first preset duration; or,

[0070] The outdoor ambient temperature is lower than the third temperature threshold, and the duration for which the difference between the outdoor ambient temperature and the outdoor coil temperature is not lower than the third defrosting temperature difference threshold reaches a first preset duration.

[0071] Exemplarily, the first defrost temperature difference threshold may be preset to 5°C, the second defrost temperature difference threshold may be preset to 6°C, and the third defrost temperature difference threshold may be preset to 5.3°C.

[0072] In this way, by setting the defrost temperature difference threshold, it is possible to further accurately determine whether the air conditioner is frosted, thereby ensuring the accuracy of turning on the air conditioner for defrosting.

[0073] In combination with the above, in one embodiment, when it is determined that the air conditioner is in a low-frequency operation state, satisfying the first defrost start judgment condition may specifically include:

[0074] When it is determined that the air conditioner is in a low-frequency operation state, if the outdoor ambient temperature is ≥0°C (the first temperature threshold), the outdoor coil temperature is ≤-4.5°C (the first defrost temperature threshold) for a duration of 3 minutes (the first preset duration), and the maximum difference in exhaust temperature within 10 minutes (the second preset duration) from the current moment is ≥5°C (the first exhaust temperature difference threshold), then it can be determined that the first defrost start judgment condition is met; or,

[0075] When it is determined that the air conditioner is in a low-frequency operation state, if -5°C (the second temperature threshold) ≤ the outdoor ambient temperature < 0°C, the duration of the outdoor coil temperature ≤ -6°C (the second defrost temperature threshold) reaches 3 minutes, the maximum difference in exhaust temperature within 10 minutes from the current moment is ≥ 4°C (the second exhaust temperature difference threshold), and the duration of the outdoor ambient temperature - outdoor coil temperature ≥ 5°C (the first defrost temperature difference threshold) reaches 3 minutes, it can be determined that the first defrost start judgment condition is met; or,

[0076] When it is determined that the air conditioner is in a low-frequency operation state, if -10°C (the third temperature threshold) ≤ the outdoor ambient temperature < -5°C, the duration of the outdoor coil temperature ≤ -10°C (the third defrost temperature threshold) reaches 3 minutes, the maximum difference in exhaust temperature within 10 minutes from the current moment is ≥ 4°C (the third exhaust temperature difference threshold), and the duration of the outdoor ambient temperature - outdoor coil temperature ≥ 6°C (the second defrost temperature difference threshold) reaches 3 minutes, it can be determined that the first defrost start judgment condition is met; or,

[0077] After determining that the air conditioner is in low-frequency operation state, if the outdoor ambient temperature is less than -10℃, the outdoor coil temperature is ≤-13℃ (the fourth defrost temperature threshold) for 3 minutes, the maximum difference in exhaust temperature within 10 minutes from the current moment is ≥3℃ (the fourth exhaust temperature difference threshold), and the outdoor ambient temperature - outdoor coil temperature is ≥5.3℃ (the third defrost temperature difference threshold) for 3 minutes, it can be determined that the first defrost start judgment condition is met.

[0078] In this way, when it is determined that the air conditioner is in a low-frequency operation state, different defrost temperature thresholds, defrost temperature difference thresholds, and exhaust temperature difference thresholds are corresponded to different outdoor ambient temperatures. The set first defrost start judgment condition can be made more accurate and adapted to different outdoor ambient temperatures to ensure the accuracy of turning on the air conditioner defrost.

[0079] Optionally, in S102, determining that the air conditioner is in a low-frequency operation state may include:

[0080] According to the outdoor ambient temperature, determine the low-frequency operation time corresponding to the outdoor ambient temperature;

[0081] If the duration during which the operating frequency of the air conditioner is lower than the operating frequency threshold reaches a low-frequency operating duration corresponding to the outdoor ambient temperature, it is determined that the air conditioner is in a low-frequency operating state.

[0082] Among them, the low-frequency operation duration is negatively correlated with the outdoor ambient temperature.

[0083] Specifically, the duration of the operation frequency of the air conditioner being lower than the operation frequency threshold reaches the low-frequency operation duration corresponding to the outdoor ambient temperature, which may include:

[0084] The outdoor ambient temperature is greater than or equal to the first temperature threshold, and the duration of the air conditioner's operating frequency being lower than the operating frequency threshold reaches a first low-frequency operating duration; or,

[0085] The outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, and the duration for which the operating frequency of the air conditioner is lower than the operating frequency threshold reaches the second low-frequency operating duration; or,

[0086] The outdoor ambient temperature is greater than or equal to the third temperature threshold and less than the second temperature threshold, and the duration for which the operating frequency of the air conditioner is lower than the operating frequency threshold reaches a third low-frequency operating duration; or,

[0087] The outdoor ambient temperature is lower than the third temperature threshold, and the duration for which the operating frequency of the air conditioner is lower than the operating frequency threshold reaches a fourth low-frequency operating duration.

[0088] Exemplarily, the first low-frequency operation duration can be preset and set, and its value range can be 60min to 70min; the second low-frequency operation duration can be preset and set, and its value range can be 70min to 80min; the third low-frequency operation duration can be preset and set, and its value range can be 80min to 90min; the fourth low-frequency operation duration can be preset and set, and its value range can be 90min to 100min.

[0089] In this way, by corresponding different low-frequency operation durations to different outdoor ambient temperatures, the judgment conditions for determining whether the air conditioner is in a low-frequency operation state can be adapted to different outdoor ambient temperatures, so that the judgment conditions for determining whether the air conditioner is in a low-frequency operation state are more accurate, thereby ensuring the accuracy of the air conditioner defrosting.

[0090] In combination with the above, in one embodiment, the conditions for determining whether to turn on the air conditioner defrost may include:

[0091] If the outdoor ambient temperature is ≥0°C (first temperature threshold), the air conditioner's operating frequency is lower than the operating frequency threshold for 65 minutes (first low-frequency operation duration), the outdoor coil temperature is ≤-4.5°C (first defrost temperature threshold) for 3 minutes (first preset duration), and the maximum difference in exhaust temperature within 10 minutes (second preset duration) from the current moment is ≥5°C (first exhaust temperature difference threshold); or,

[0092] If -5℃ (second temperature threshold) ≤ outdoor ambient temperature < 0℃, the duration of the air conditioner's operating frequency being lower than the operating frequency threshold reaches 75 minutes (second low frequency operating duration), the duration of the outdoor coil temperature ≤ -6℃ (second defrost temperature threshold) reaches 3 minutes, the maximum difference in exhaust temperature within 10 minutes from the current moment is ≥ 4℃ (second exhaust temperature difference threshold), and the duration of the outdoor ambient temperature - outdoor coil temperature ≥ 5℃ (first defrost temperature difference threshold) reaches 3 minutes; or,

[0093] If -10℃ (third temperature threshold) ≤ outdoor ambient temperature < -5℃, the duration of the air conditioner's operating frequency being lower than the operating frequency threshold reaches 85 minutes (third low-frequency operating duration), the duration of the outdoor coil temperature ≤ -10℃ (third defrost temperature threshold) reaches 3 minutes, the maximum difference in exhaust temperature within 10 minutes from the current moment is ≥ 4℃ (third exhaust temperature difference threshold), and the duration of the outdoor ambient temperature - outdoor coil temperature ≥ 6℃ (second defrost temperature difference threshold) reaches 3 minutes; or,

[0094] If the outdoor ambient temperature is <-10℃, the air conditioner's operating frequency is lower than the operating frequency threshold for 95 minutes (the fourth low-frequency operating time), the outdoor coil temperature is ≤-13℃ (the fourth defrost temperature threshold) for 3 minutes, the maximum exhaust temperature difference within 10 minutes from the current moment is ≥3℃ (the fourth exhaust temperature difference threshold), and the outdoor ambient temperature - outdoor coil temperature is ≥5.3℃ (the third defrost temperature difference threshold) for 3 minutes.

[0095] In this way, different outdoor ambient temperatures correspond to different low-frequency operation durations, defrost temperature thresholds, defrost temperature difference thresholds, and exhaust temperature difference thresholds, making it possible to determine whether the air conditioner is in a low-frequency operation state and to set the first defrost start judgment condition more accurate and adapted to different outdoor ambient temperatures, thereby ensuring the accuracy of starting the air conditioner defrost.

[0096] Optionally, the temperature parameter may further include the indoor ambient temperature and the indoor coil temperature; and the first defrost start judgment condition may further include:

[0097] The maximum difference of the indoor coil temperature within a second preset time period from the current moment is not greater than the indoor coil temperature difference threshold corresponding to the indoor ambient temperature.

[0098] Exemplarily, the indoor ambient temperature may be acquired through a temperature sensor pre-set indoors, and the indoor coil temperature may be acquired through a temperature sensor pre-set on the indoor coil.

[0099] Specifically, the maximum difference of the indoor coil temperature within the second preset time period from the current moment to the present moment is not greater than the indoor coil temperature difference threshold corresponding to the indoor ambient temperature, which may include:

[0100] The indoor ambient temperature is greater than the fourth temperature threshold, and the maximum difference in indoor coil temperature within the second preset time period from the current moment is not greater than the first indoor coil temperature difference threshold; or,

[0101] The indoor ambient temperature is less than the fourth temperature threshold and greater than or equal to the fifth temperature threshold, and the maximum difference in indoor coil temperature within a second preset time period from the current moment is not greater than the second indoor coil temperature difference threshold; or,

[0102] The indoor ambient temperature is less than the fifth temperature threshold and greater than or equal to the sixth temperature threshold, and the maximum difference in indoor coil temperature within the second preset time period from the current moment is not greater than the third indoor coil temperature difference threshold; or,

[0103] The indoor ambient temperature is lower than the sixth temperature threshold, and the maximum difference of the indoor coil temperature within a second preset time period from the current moment is not higher than the fourth indoor coil temperature difference threshold.

[0104] Among them, the indoor coil temperature difference threshold is positively correlated with the indoor ambient temperature.

[0105] Exemplarily, the fourth temperature threshold may be preset to 20°C, the fifth temperature threshold may be preset to 15°C, and the sixth temperature threshold may be preset to 10°C. The fourth temperature threshold is greater than the fifth temperature threshold, the fifth temperature threshold is greater than the sixth temperature threshold, and the airflow temperature threshold is greater than the first temperature threshold. The first indoor coil temperature difference threshold may be preset to 3°C, the first indoor coil temperature difference threshold may be preset to 2°C, the first indoor coil temperature difference threshold may be preset to 1.5°C, and the fourth indoor coil temperature difference threshold may be preset to 1°C.

[0106] In this way, on the basis of different defrost temperature thresholds, defrost temperature difference thresholds, and exhaust temperature difference thresholds corresponding to different outdoor ambient temperatures, and further combined with different indoor coil temperature difference thresholds corresponding to different indoor ambient temperatures, the set first defrost start judgment condition can be made more accurate and adapted to different outdoor ambient temperatures and indoor ambient temperatures to ensure the accuracy of turning on the air conditioner defrost.

[0107] Optionally, the air conditioner defrost control method provided by the present disclosure may further include:

[0108] In response to determining that the air conditioner is not in the low-frequency operation state, it is determined whether to turn on the air conditioner defrost according to the temperature parameter and the corresponding second defrost start judgment condition in the normal operation state.

[0109] If the temperature parameter satisfies the second defrost start judgment condition corresponding to the normal operation state, it can be determined to start the air conditioner defrost; if the temperature parameter does not meet the second defrost start judgment condition corresponding to the normal operation state, it can be determined not to start the air conditioner defrost. The second defrost start judgment condition may include:

[0110] The outdoor ambient temperature is greater than or equal to the first temperature threshold, and the outdoor coil temperature is not greater than the fifth defrosting temperature threshold for a duration that reaches a first preset duration; or,

[0111] The outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, the duration of the outdoor coil temperature not greater than the sixth defrost temperature threshold reaches a first preset duration, and the duration of the difference between the outdoor ambient temperature and the outdoor coil temperature not less than the fourth defrost temperature difference threshold reaches a first preset duration; or,

[0112] The outdoor ambient temperature is greater than or equal to the third temperature threshold and less than the second temperature threshold, the duration of the outdoor coil temperature not greater than the seventh defrost temperature threshold reaches a first preset duration, and the duration of the difference between the outdoor ambient temperature and the outdoor coil temperature not less than the fifth defrost temperature difference threshold reaches a first preset duration; or,

[0113] The outdoor ambient temperature is lower than the third temperature threshold, the outdoor coil temperature is not higher than the eighth defrost temperature threshold for a first preset time, and the difference between the outdoor ambient temperature and the outdoor coil temperature is not lower than the sixth defrost temperature difference threshold for a first preset time.

[0114] For example, the fifth defrost temperature threshold may be preset to -6°C, the sixth defrost temperature threshold may be preset to -7°C, the seventh defrost temperature threshold may be preset to -13°C, and the eighth defrost temperature threshold may be preset to -15°C. The fourth defrost temperature difference threshold may be preset to 6°C, the fifth defrost temperature difference threshold may be preset to 7°C, and the sixth defrost temperature difference threshold may be preset to 6°C. In this way, different outdoor ambient temperatures correspond to different defrost temperature thresholds and defrost temperature difference thresholds, so that the set second defrost start judgment condition can be made more accurate and adapted to different outdoor ambient temperatures to ensure the accuracy of starting the air conditioner defrost.

[0115] When the operating frequency of the air conditioner is at a low frequency for a long time, the heating capacity of the air conditioner is low, the indoor coil temperature is lower than normal, and the outdoor coil temperature is relatively high. Therefore, the defrost temperature threshold corresponding to the same outdoor ambient temperature in the first defrost start judgment condition can be smaller than the defrost temperature threshold corresponding to the second defrost start judgment condition; and / or the defrost temperature difference threshold corresponding to the same outdoor ambient temperature in the first defrost start judgment condition is smaller than the defrost temperature difference threshold corresponding to the second defrost start judgment condition. In this way, the air conditioner can accurately and timely start defrosting when it is in a normal operating state or a low-frequency operating state, so as to avoid affecting the heating effect of the air conditioner, thereby improving the user experience.

[0116] Specifically, when the outdoor ambient temperature is greater than or equal to the first temperature threshold, the corresponding first defrost temperature threshold in the first defrost start judgment condition may be less than the corresponding fifth defrost temperature threshold in the second defrost start judgment condition; when the outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, the corresponding second defrost temperature threshold in the first defrost start judgment condition may be less than the corresponding sixth defrost temperature threshold in the second defrost start judgment condition; when the outdoor ambient temperature is greater than or equal to the third temperature threshold and less than the second temperature threshold, the corresponding third defrost temperature threshold in the first defrost start judgment condition may be less than the corresponding seventh defrost temperature threshold in the second defrost start judgment condition; when the outdoor ambient temperature is less than the third temperature threshold, the corresponding fourth defrost temperature threshold in the first defrost start judgment condition may be less than the corresponding eighth defrost temperature threshold in the second defrost start judgment condition.

[0117] When the outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, the first defrost temperature difference threshold corresponding to the first defrost start judgment condition may be less than the fourth defrost temperature difference threshold corresponding to the second defrost start judgment condition; when the outdoor ambient temperature is greater than or equal to the third temperature threshold and less than the second temperature threshold, the second defrost temperature difference threshold corresponding to the first defrost start judgment condition may be less than the fifth defrost temperature difference threshold corresponding to the second defrost start judgment condition; when the outdoor ambient temperature is less than the third temperature threshold, the third defrost temperature difference threshold corresponding to the first defrost start judgment condition may be less than the sixth defrost temperature difference threshold corresponding to the second defrost start judgment condition.

[0118] Exemplarily, the fifth defrost temperature threshold, the sixth defrost temperature threshold, the seventh defrost temperature threshold, the eighth defrost temperature threshold, the fourth defrost temperature difference threshold, the fifth defrost temperature difference threshold and the sixth defrost temperature difference threshold can be pre-calibrated through relevant tests under normal operating conditions, and the attenuation coefficient corresponding to the outdoor ambient temperature can be pre-calibrated, wherein the attenuation coefficient is less than 1.

[0119] For example, when the outdoor ambient temperature is greater than or equal to the first temperature threshold, the corresponding attenuation coefficient can be determined as a1, and the value range of a1 can be 0.7 to 0.8; when the outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, the corresponding attenuation coefficient can be determined as a2, and the value range of a2 can be 0.8 to 0.9; when the outdoor ambient temperature is greater than or equal to the third temperature threshold and less than the second temperature threshold, the corresponding attenuation coefficient can be determined as a3, and the value range of a3 can be 0.8 to 0.9; when the outdoor ambient temperature is less than the third temperature threshold, the corresponding attenuation coefficient can be determined as a4, and the value range of a4 can be 0.85 to 0.9.

[0120] The product of the defrost temperature threshold corresponding to the outdoor ambient temperature in the second defrost start judgment condition and the attenuation coefficient can be determined as the defrost temperature threshold corresponding to the same outdoor ambient temperature in the first defrost start judgment condition; and / or, the product of the defrost temperature difference threshold corresponding to the outdoor ambient temperature in the second defrost start judgment condition and the attenuation coefficient can be determined as the defrost temperature difference threshold corresponding to the same outdoor ambient temperature in the first defrost start judgment condition.

[0121] For example, if the fifth defrost temperature threshold is t5, the value of the first defrost temperature threshold t1 can be determined as t5*a1; if the sixth defrost temperature threshold is t6, the value of the second defrost temperature threshold t2 can be determined as t6*a2; if the seventh defrost temperature threshold is t7, the value of the third defrost temperature threshold t3 can be determined as t7*a3; if the eighth defrost temperature threshold is t8, the value of the fourth defrost temperature threshold t4 can be determined as t8*a4. If the fourth defrost temperature difference threshold is t D-value4 , then the first defrosting temperature difference threshold t D-value1 The value of t is determined as D-value4 *a2; if the fifth defrost temperature difference threshold is t D-value5 , then the second defrosting temperature difference threshold t D-value2 The value of t is determined as D-value5 *a3; if the sixth defrost temperature difference threshold is t D-value3 , then the third defrosting temperature difference threshold t D-value3 The value of t is determined as D-value6 *a4.

[0122] Based on the same inventive concept, the present disclosure also provides an air conditioner defrost control device. Figure 2 2 is a block diagram of an air conditioner defrost control device 200 provided by an exemplary embodiment of the present disclosure. Figure 2 The air conditioner defrost control device 200 may include:

[0123] A monitoring module 201, for monitoring temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner when the air conditioner is in a heating mode;

[0124] The first determination module 202 is used to determine whether to turn on the air conditioner defrost in response to determining that the air conditioner is in a low-frequency operation state, according to the temperature parameter and the first defrost start judgment condition corresponding to the low-frequency operation state, wherein the low-frequency operation state is a state in which the operating frequency is lower than a preset operating frequency threshold for a duration that reaches a preset low-frequency operation duration.

[0125] Through the above technical solution, when the air conditioner is in the heating mode, the current operating state of the air conditioner can be determined by monitoring the temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner. If it is determined that the air conditioner is in a low-frequency operation state, whether to turn on the air conditioner defrost is determined based on the temperature parameters and the first defrost start judgment condition corresponding to the low-frequency operation state, that is, when the air conditioner is in a long-term low-frequency operation, it can be combined with the temperature parameters related to the operation of the air conditioner to determine whether the air conditioner is frosted, and then it can be determined whether to turn on the air conditioner defrost. In this way, when the air conditioner is in the heating mode and has been in a long-term low-frequency operation, when the air conditioner is frosted, the air conditioner defrost can be turned on accurately and timely to avoid affecting the heating effect of the air conditioner, thereby improving the user experience.

[0126] Optionally, the temperature parameters include outdoor coil temperature, exhaust temperature and outdoor ambient temperature; and the first defrost start judgment condition includes:

[0127] The duration for which the outdoor coil temperature is not greater than the defrost temperature threshold corresponding to the outdoor ambient temperature reaches a first preset duration, and the maximum difference in exhaust temperature within a second preset time from the current moment is not less than the exhaust temperature difference threshold corresponding to the outdoor ambient temperature.

[0128] Optionally, if the outdoor ambient temperature is lower than a first temperature threshold, the first defrost start judgment condition further includes:

[0129] The duration during which the difference between the outdoor ambient temperature and the outdoor coil temperature is not less than a defrosting temperature difference threshold corresponding to the outdoor ambient temperature reaches the first preset duration.

[0130] Optionally, there is a positive correlation between the defrost temperature threshold and the outdoor ambient temperature.

[0131] Optionally, the first determining module 202 includes:

[0132] A first determining submodule is used to determine, according to the outdoor ambient temperature, a low-frequency operation time corresponding to the outdoor ambient temperature;

[0133] The second determination submodule is used to determine that the air conditioner is in the low-frequency operation state if the duration of the operation frequency of the air conditioner being lower than the operation frequency threshold reaches the low-frequency operation duration corresponding to the outdoor ambient temperature.

[0134] Optionally, the low-frequency operation duration is negatively correlated with the outdoor ambient temperature.

[0135] Optionally, the temperature parameter further includes indoor ambient temperature and indoor coil temperature; and the first defrost start judgment condition further includes:

[0136] The maximum difference of the indoor coil temperature within the second preset time period from the current moment is not greater than the indoor coil temperature difference threshold corresponding to the indoor ambient temperature.

[0137] Optionally, the indoor coil temperature difference threshold value is positively correlated with the indoor ambient temperature.

[0138] Optionally, the device 200 further includes:

[0139] The second determination module is used to determine whether to turn on the air conditioner defrost in response to determining that the air conditioner is not in the low-frequency operation state, according to the temperature parameter and the corresponding second defrost start judgment condition in the normal operation state.

[0140] Among them, the defrost temperature threshold corresponding to the same outdoor ambient temperature in the first defrost start judgment condition is smaller than the defrost temperature threshold corresponding to the second defrost start judgment condition; and / or the defrost temperature difference threshold corresponding to the same outdoor ambient temperature in the first defrost start judgment condition is smaller than the defrost temperature difference threshold corresponding to the second defrost start judgment condition.

[0141] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0142] The present disclosure also provides a computer-readable storage medium on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the air conditioner defrosting control method provided by the present disclosure are implemented.

[0143] Figure 3 800 is a block diagram of an air conditioner according to an exemplary embodiment. Figure 3 The air conditioner 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input / output interface 812 , a sensor component 814 , and a communication component 816 .

[0144] The processing component 802 generally controls the overall operation of the air conditioner 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned air conditioner defrosting control method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0145] The memory 804 is configured to store various types of data to support the operation of the air conditioner 800. Examples of such data include instructions for any application or method operating on the air conditioner 800. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0146] The power supply component 806 provides power to various components of the air conditioner 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the air conditioner 800.

[0147] The multimedia component 808 includes a screen that provides an output interface between the air conditioner 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.

[0148] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the air conditioner 800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

[0149] The input / output interface 812 provides an interface between the processing component 802 and the peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0150] The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the air conditioner 800. For example, the sensor assembly 814 can detect the on / off state of the air conditioner 800, the relative positioning of the components, such as the display and keypad of the air conditioner 800, and the sensor assembly 814 can also detect the position change of the air conditioner 800 or a component of the air conditioner 800, the presence or absence of contact between the user and the air conditioner 800, the position or acceleration / deceleration of the air conditioner 800 and the temperature change of the air conditioner 800. The sensor assembly 814 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.

[0151] The communication component 816 is configured to facilitate wired or wireless communication between the air conditioner 800 and other devices. The air conditioner 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0152] In an exemplary embodiment, the air conditioner 800 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above-mentioned air conditioner defrost control method.

[0153] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by a processor 820 of the air conditioner 800 to complete the air conditioner defrosting control method. 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 another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for executing the above air conditioner defrost control method when executed by the programmable device.

[0155] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0156] It should be understood that the present disclosure is not limited to the exact 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 disclosure is limited only by the appended claims.

Claims

1. An air conditioner defrosting control method, characterized in that: The method comprises: When the air conditioner is in a heating mode, monitoring temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner; In response to determining that the air conditioner is in a low-frequency operation state, determining whether to turn on the air conditioner defrost according to the temperature parameter and a first defrost start judgment condition corresponding to the low-frequency operation state, wherein the low-frequency operation state is a state in which the operation frequency is lower than a preset operation frequency threshold for a continuous time that reaches a preset low-frequency operation time; The temperature parameters include outdoor coil temperature, exhaust temperature and outdoor ambient temperature; the first defrost start judgment condition includes: The duration for which the outdoor coil temperature is not greater than the defrost temperature threshold corresponding to the outdoor ambient temperature reaches a first preset duration, and the maximum difference in exhaust temperature within a second preset time from the current moment is not less than the exhaust temperature difference threshold corresponding to the outdoor ambient temperature.

2. The method according to claim 1, characterized in that If the outdoor ambient temperature is lower than the first temperature threshold, the first defrost start judgment condition further includes: The duration during which the difference between the outdoor ambient temperature and the outdoor coil temperature is not less than a defrosting temperature difference threshold corresponding to the outdoor ambient temperature reaches the first preset duration.

3. The method according to claim 1, characterized in that There is a positive correlation between the defrost temperature threshold and the outdoor ambient temperature.

4. The method according to claim 1, characterized in that Determining that the air conditioner is in a low-frequency operation state includes: Determining, according to the outdoor ambient temperature, a low-frequency operation duration corresponding to the outdoor ambient temperature; If the duration during which the operating frequency of the air conditioner is lower than the operating frequency threshold reaches a low-frequency operating duration corresponding to the outdoor ambient temperature, it is determined that the air conditioner is in the low-frequency operating state.

5. The method according to claim 4, characterized in that The low-frequency operation duration is negatively correlated with the outdoor ambient temperature.

6. The method according to claim 1, characterized in that The temperature parameters also include indoor ambient temperature and indoor coil temperature; the first defrost start judgment condition also includes: The maximum difference of the indoor coil temperature within the second preset time period from the current moment is not greater than the indoor coil temperature difference threshold corresponding to the indoor ambient temperature.

7. The method according to claim 6, characterized in that The indoor coil temperature difference threshold value is positively correlated with the indoor ambient temperature.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: In response to determining that the air conditioner is not in the low-frequency operation state, it is determined whether to turn on the air conditioner defrost according to the temperature parameter and a corresponding second defrost turn-on judgment condition in the normal operation state.

9. The method according to claim 8, characterized in that The defrost temperature threshold corresponding to the first defrost start judgment condition for the same outdoor ambient temperature is lower than the defrost temperature threshold corresponding to the second defrost start judgment condition; And / or, the defrost temperature difference threshold corresponding to the same outdoor ambient temperature in the first defrost start judgment condition is smaller than the defrost temperature difference threshold corresponding to the second defrost start judgment condition.

10. An air conditioner defrost control device, characterized in that: include: A monitoring module, used for monitoring temperature parameters related to the operation of the air conditioner and the operating frequency of the air conditioner when the air conditioner is in a heating mode; A first determination module is used for, in response to determining that the air conditioner is in a low-frequency operation state, determining whether to turn on the air conditioner defrost according to the temperature parameter and a first defrost start judgment condition corresponding to the low-frequency operation state, wherein the low-frequency operation state is a state in which the operation frequency is lower than a preset operation frequency threshold for a continuous time that reaches a preset low-frequency operation time; The temperature parameters include outdoor coil temperature, exhaust temperature and outdoor ambient temperature; the first defrost start judgment condition includes: The duration for which the outdoor coil temperature is not greater than the defrost temperature threshold corresponding to the outdoor ambient temperature reaches a first preset duration, and the maximum difference in exhaust temperature within a second preset time from the current moment is not less than the exhaust temperature difference threshold corresponding to the outdoor ambient temperature.

11. An air conditioner, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to execute 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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