Air conditioner and control method, device and computer readable storage medium thereof

Abstract

The embodiment of the application provides a kind of air conditioner and its control method, device, computer readable storage medium, the air conditioner control method includes: in response to air conditioner is in heating operation, determine whether the temperature attenuation rate of indoor coil is greater than attenuation rate threshold;In response to determining that the temperature attenuation rate of indoor coil is greater than attenuation rate threshold, determine whether the current operating parameter of air conditioner is consistent with stable operating parameter, the operating parameter includes compressor operating frequency, indoor fan speed and outdoor fan speed;In response to determining that the current operating parameter of air conditioner is consistent with stable operating parameter, control the air conditioner defrosting;In response to determining that the current operating parameter of air conditioner is not consistent with stable operating parameter, according to outdoor coil temperature, determine whether the air conditioner defrosting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an air conditioner and a control method, device and computer readable storage medium thereof. BACKGROUND

[0002] When an air conditioner is in a low-temperature and high-humidity environment and is in a heating operation, the outdoor heat exchanger is prone to frosting, which leads to a significant decrease in the heating performance of the air conditioner, and thus the air conditioner needs to be controlled to defrost in time. However, the defrosting control method in the related art has a large control defect, so that the air conditioner cannot defrost in time, which seriously affects the heating effect of the air conditioner and the indoor environmental comfort. SUMMARY

[0003] The embodiments of the present application provide an air conditioner and a control method, device and computer readable storage medium thereof, which can control the air conditioner to defrost in time and ensure the heating effect of the air conditioner and the indoor environmental comfort.

[0004] In a first aspect, the embodiments of the present application provide an air conditioner control method, which comprises: in response to the air conditioner being in a heating operation, determining whether a temperature decay rate of an indoor coil is greater than a decay rate threshold; in response to determining that the temperature decay rate of the indoor coil is greater than the decay rate threshold, determining whether a current operation parameter of the air conditioner is consistent with a stable operation parameter, the operation parameter comprising a compressor operation frequency, an indoor fan speed and an outdoor fan speed; in response to determining that the current operation parameter of the air conditioner is consistent with the stable operation parameter, controlling the air conditioner to defrost; and in response to determining that the current operation parameter of the air conditioner is inconsistent with the stable operation parameter, determining whether the air conditioner defrosts according to an outdoor coil temperature.

[0005] In some embodiments, before determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, the air conditioner control method comprises: determining whether a defrosting frequency of the air conditioner in the heating operation is greater than or equal to a threshold frequency; in response to determining that the defrosting frequency is less than the threshold frequency, determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold; and in response to determining that the defrosting frequency is greater than or equal to the threshold frequency, determining whether the air conditioner defrosts according to the outdoor coil temperature.

[0006] In some embodiments, before determining whether the defrosting frequency of the air conditioner in the heating operation is greater than or equal to the threshold frequency, the air conditioner control method comprises: determining whether an outdoor environment temperature is less than an outer ring temperature threshold; in response to determining that the outdoor environment temperature is less than the outer ring temperature threshold, determining whether the air conditioner defrosts according to the outdoor coil temperature; and in response to determining that the outdoor environment temperature is greater than or equal to the outer ring temperature threshold, determining whether the defrosting frequency of the air conditioner in the heating operation is greater than or equal to the threshold frequency.

[0007] In some embodiments, after determining that the outdoor environment temperature is greater than or equal to the outer ring temperature threshold, before determining whether the number of defrosting times of the air conditioner in the heating operation is greater than or equal to the threshold number, the air conditioner control method comprises: determining whether the temperature difference between the indoor environment temperature and the set temperature is greater than or equal to the temperature difference threshold; in response to determining that the temperature difference between the indoor environment temperature and the set temperature is greater than or equal to the temperature difference threshold, determining whether the air conditioner defrosts according to the outdoor coil temperature; in response to determining that the temperature difference between the indoor environment temperature and the set temperature is less than the temperature difference threshold, determining whether the number of defrosting times of the air conditioner in the heating operation is greater than or equal to the threshold number.

[0008] In some embodiments, after determining that the number of defrosting times is less than the threshold number, before determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, the air conditioner control method comprises: determining whether the current temperature of the indoor coil is less than or equal to the defrosting temperature threshold; in response to determining that the current temperature of the indoor coil is less than or equal to the defrosting temperature threshold, determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold.

[0009] In some embodiments, before determining whether the current temperature of the indoor coil is less than or equal to the defrosting temperature threshold, the air conditioner control method comprises: determining the defrosting temperature threshold according to the outdoor environment temperature.

[0010] In some embodiments, before determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, the air conditioner control method comprises: determining whether the operating parameter of the air conditioner in the heating operation remains unchanged within a preset time length; in response to determining that the operating parameter of the air conditioner after entering the heating operation remains unchanged within a preset time length, taking the operating parameter as the stable operating parameter of the air conditioner.

[0011] In some embodiments, before determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, the air conditioner control method comprises: obtaining the highest temperature and the current temperature of the indoor coil in the heating operation; calculating the ratio of the current temperature and the highest temperature of the indoor coil, and taking the ratio as the temperature decay rate of the indoor coil.

[0012] In a second aspect, the embodiments of the present application provide an air conditioner control device, comprising: a first comparison circuit configured to determine whether a temperature decay rate of an indoor coil is greater than a decay rate threshold in response to the air conditioner being in a heating operation; a second comparison circuit configured to determine whether current operation parameters of the air conditioner are consistent with stable operation parameters in response to determining that the temperature decay rate of the indoor coil is greater than the decay rate threshold, the operation parameters comprising a compressor operation frequency, an indoor fan speed and an outdoor fan speed; a first control circuit configured to control the air conditioner to defrost in response to determining that the current operation parameters of the air conditioner are consistent with the stable operation parameters; and a second control circuit configured to determine whether the air conditioner defrosts according to an outdoor coil temperature in response to determining that the current operation parameters of the air conditioner are inconsistent with the stable operation parameters.

[0013] In a third aspect, the embodiments of the present application provide an air conditioner, comprising: a memory storing a computer program; and a processor, the computer program being executed by the processor to implement the air conditioner control method provided in any of the above embodiments.

[0014] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, having a computer program stored thereon, the computer program being loaded by a processor to perform the steps in the air conditioner control method described above.

[0015] The air conditioner control method provided by the embodiments of the present application can control the air conditioner to defrost in time when the temperature decay rate of the indoor coil is greater than the decay rate threshold and the current operation parameters of the air conditioner are consistent with the stable operation parameters, avoiding the significant decrease of the indoor coil temperature caused by the frosting of the outdoor heat exchanger, and ensuring the heating effect of the air conditioner and the indoor environmental comfort, thereby filling the control defect of the related art that cannot control defrosting in time. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some of the embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0017] Figure 1 is a flowchart of the air conditioner control method provided by some embodiments of the present application;

[0018] Figure 2 is a partial flowchart of the air conditioner control method provided by some embodiments of the present application;

[0019] Figure 3 is another partial flowchart of the air conditioner control method provided by some embodiments of the present application;

[0020] Figure 4 is another partial flowchart of the air conditioner control method provided by some embodiments of the present application;

[0021] Figure 5 is another partial flowchart of the air conditioner control method provided by some embodiments of the present application;

[0022] Figure 6 is another partial flowchart of the air conditioner control method provided by some embodiments of the present application;

[0023] Figure 7 is another partial flowchart of the air conditioner control method provided by some embodiments of the present application;

[0024] Figure 8 is a structural diagram of the air conditioner provided by some embodiments of the present application.

[0025] Main element symbol explanation:

[0026] 1-air conditioner, 10-processor, 20-memory. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms “first” and “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of “multiple” is two or more, unless otherwise specifically limited.

[0029] “A and / or B” includes the following three combinations: only A, only B, and a combination of A and B.

[0030] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0031] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0032] In related technologies, air conditioners primarily determine the timing of defrosting based on the outdoor ambient temperature and the outdoor coil temperature. When the indoor coil temperature drops significantly, the defrosting conditions may not yet be met, preventing the air conditioner from defrosting in a timely manner. However, the inventors have discovered that, for example, in the initial stages of heating operation, the performance degradation of the indoor heat exchanger caused by frost buildup on the outdoor heat exchanger is significantly greater than that of the outdoor heat exchanger. Even slight frost on the outdoor heat exchanger can cause a substantial drop in the indoor coil temperature, leading to a significant decrease in the air conditioner's outlet temperature. This can even cause the air conditioner to blow cold air into the indoor environment, severely impacting indoor comfort.

[0033] like Figure 1 As shown, in a first aspect, embodiments of this application provide an air conditioner control method, which includes steps S31 to S34, and can control the air conditioner 1 to defrost in a timely manner to ensure the heating effect of the air conditioner 1 and the comfort of the indoor environment. The type of air conditioner 1 can be determined according to actual needs, and can be, for example, a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, etc., and embodiments of this application do not limit this.

[0034] S31: In response to the air conditioner 1 being in heating operation, determine whether the temperature decay rate of the indoor coil is greater than the decay rate threshold.

[0035] Here, the temperature decay rate of the indoor coil, i.e. the degree of decrease of the temperature of the indoor coil, can reflect the degree of decrease of the heating performance of the air conditioner 1. The decay rate threshold can be preset in the control system of the air conditioner 1 as a critical value for judging the degree of decrease of the temperature of the indoor coil. If the temperature decay rate of the indoor coil is greater than the decay rate threshold, it indicates that the temperature of the indoor coil and the outlet air temperature of the air conditioner 1 have both decreased to a large extent, and the heating performance of the air conditioner 1 has decreased significantly or even the phenomenon of blowing cold air occurs, and the user in the indoor environment cannot obtain a relatively warm and comfortable environment, and even can feel uncomfortable due to the phenomenon of blowing cold air of the air conditioner 1; if the temperature decay rate of the indoor coil is less than the decay rate threshold, it indicates that the temperature of the indoor coil and the heating performance of the air conditioner 1 have not decreased to a large extent, and the outlet air temperature of the air conditioner 1 is relatively appropriate, and the indoor environment comfort has not decreased significantly.

[0036] S32: In response to determining that the temperature decay rate of the indoor coil is greater than the decay rate threshold, it is determined whether the current operating parameters of the air conditioner 1 are consistent with the stable operating parameters, the operating parameters including the compressor operating frequency, the indoor fan speed and the outdoor fan speed.

[0037] Here, the current operating parameters of the air conditioner 1 refer to the operating parameters of the air conditioner 1 at the current time, and the stable operating parameters of the air conditioner 1 refer to the operating parameters of the air conditioner 1 in the stable operating state in the heating operation. In the stable operating state, the operating parameters of the air conditioner 1 remain unchanged or substantially unchanged within a predetermined time length, and substantially unchanged means that the change rate of the operating parameters of the air conditioner 1 is within a predetermined rate range, for example, 5%, so that the operating state of the air conditioner 1 does not change significantly.

[0038] When it is determined that the temperature decay rate of the indoor coil is greater than the decay rate threshold, the heating performance of the air conditioner 1 has decreased significantly or even the phenomenon of blowing cold air occurs, and the air conditioner 1 needs to be adjusted and controlled; at this time, it is necessary to further compare the current operating parameters of the air conditioner 1 with the stable operating parameters to determine whether they are consistent. Here, if the current operating parameters of the air conditioner 1 are exactly the same as the stable operating parameters, or the difference / ratio of the current operating parameters and the stable operating parameters is within a predetermined difference / ratio range, it can be considered that the current operating parameters of the air conditioner 1 are consistent with the stable operating parameters.

[0039] S33: In response to determining that the current operating parameters of the air conditioner 1 are consistent with the stable operating parameters, the air conditioner 1 is controlled to defrost.

[0040] When the current operating parameters and stable operating parameters of air conditioner 1 are consistent, it indicates that the temperature drop of the indoor coil and the decrease in the heating performance of air conditioner 1 are mainly caused by the frosting phenomenon of the outdoor heat exchanger, and the frosting phenomenon of the air conditioner heat exchanger is relatively serious; at this time, it is necessary to control air conditioner 1 to defrost in a timely manner.

[0041] S34: In response to the determination that the current operating parameters and stable operating parameters of air conditioner 1 are inconsistent, determine whether air conditioner 1 should defrost based on the outdoor coil temperature.

[0042] When the current operating parameters and stable operating parameters of air conditioner 1 are consistent, it indicates that the temperature drop of the indoor coil and the decrease in the heating performance of air conditioner 1 are not primarily caused by frosting on the outdoor heat exchanger, but rather by more complex influencing factors. In this case, defrosting control strategies in relevant technologies can be used to determine whether air conditioner 1 should defrost based on the outdoor coil temperature; when the outdoor coil temperature meets the defrosting conditions, air conditioner 1 can be controlled to defrost. Furthermore, defrosting can be determined based on the outdoor ambient temperature and the outdoor coil temperature; when both meet the defrosting conditions, air conditioner 1 can be controlled to defrost.

[0043] Compared with related technologies, the air conditioner control method provided in this application embodiment can control the air conditioner 1 to defrost in a timely manner when the temperature decay rate of the indoor coil is greater than the decay rate threshold and the current operating parameters and stable operating parameters of the air conditioner 1 are consistent. This avoids a significant drop in indoor coil temperature caused by frost on the outdoor heat exchanger, thus ensuring the heating effect of the air conditioner 1 and the comfort of the indoor environment, and filling the control defects of related technologies that cannot control defrosting in a timely manner.

[0044] like Figure 2 As shown, in some embodiments, before S31, the air conditioner control method may include S21 to S23.

[0045] S21: Determine whether the number of defrost cycles of air conditioner 1 during heating operation is greater than or equal to the threshold number of cycles.

[0046] Here, the number of defrost cycles for air conditioner 1 can be calculated from the moment air conditioner 1 enters heating mode. A threshold number of defrost cycles can be preset in the control system of air conditioner 1 and can be used to determine the heating demand of the indoor environment. The specific value of the threshold number of defrost cycles can be determined according to actual needs, and this embodiment does not limit this; for example, the value of the threshold number of defrost cycles can be a natural number greater than or equal to 4.

[0047] S22: In response to determining that the number of defrost cycles is less than a threshold number, determine whether the temperature decay rate of the indoor coil is greater than the decay rate threshold.

[0048] When the number of defrosting is less than the threshold number, it indicates that the heating demand of the indoor environment is not large and is easy to be met. At this time, it can be further determined whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, so as to control the air conditioner 1 to defrost in time when the indoor coil temperature appears obvious decay, and ensure the comfort of the indoor environment.

[0049] S23: In response to determining that the number of defrosting is greater than or equal to the threshold number, determining whether the air conditioner 1 defrosts according to the outdoor coil temperature.

[0050] When the number of defrosting is greater than or equal to the threshold number, it indicates that the heating demand of the indoor environment is large; at this time, the defrosting control strategy in the related art can be used to determine whether the air conditioner 1 defrosts according to the outdoor coil temperature, so as to avoid the air conditioner 1 from defrosting frequently and reduce the running time of the air conditioner 1 defrosting, and ensure that the air conditioner 1 can meet the heating demand of the indoor environment as soon as possible.

[0051] By setting S21-S23, the heating demand of the indoor environment can be determined in advance, and the appropriate defrosting control strategy and steps can be selected accordingly. When the heating demand of the indoor environment is not large, the defrosting control can be performed according to the temperature decay rate of the indoor coil and the running parameters of the air conditioner 1, so as to control the air conditioner 1 to defrost in time when the indoor coil temperature appears obvious decline, so that the air outlet temperature of the air conditioner 1 is maintained in a relatively warm and comfortable temperature range, thereby ensuring the comfort of the indoor environment; when the heating demand of the indoor environment is large, the defrosting control can be performed according to the defrosting control strategy in the related art, so as to avoid the air conditioner 1 from defrosting frequently and the decline of the heating effect caused by frequent defrosting, and make the air conditioner 1 mainly run in the heating state to meet the heating demand of the indoor environment as soon as possible, and rapidly improve the warmth and comfort of the indoor environment.

[0052] As shown in FIG. 1, in some examples, before S21, the air conditioner control method can include S11-S13. Figure 3

[0053] S11: Determine whether the outdoor environment temperature is less than the outer ring temperature threshold.

[0054] Here, the outdoor environment temperature can be measured by a temperature sensor arranged on the outdoor side, or obtained from the weather data published by a weather measuring unit through a data network. The outer ring temperature threshold can be pre-set in the control system of the air conditioner 1, which is used as a critical value for judging the frosting risk of the outdoor heat exchanger. If the outdoor environment temperature is less than the outer ring temperature threshold, it indicates that the frosting risk of the outdoor heat exchanger is small; if the outdoor environment temperature is greater than or equal to the outer ring temperature threshold, it indicates that there is a frosting risk of the outdoor heat exchanger and a risk of obvious fluctuation of the indoor coil temperature due to the frosting of the outdoor heat exchanger.

[0055] ​S12: In response to determining that the outdoor ambient temperature is less than the external ambient temperature threshold, determine whether the air conditioner 1 should defrost based on the outdoor coil temperature. When the outdoor ambient temperature is determined to be less than the external ambient temperature threshold, it indicates that the risk of frosting on the outdoor heat exchanger is relatively low, and the risk of significant fluctuations in the indoor coil temperature due to frosting on the outdoor heat exchanger is also relatively low. At this time, defrosting control can be performed according to the defrosting control strategy in the relevant technology to avoid frequent defrosting of the air conditioner 1 and the decrease in heating effect caused by frequent defrosting.

[0056] S13: In response to determining that the outdoor ambient temperature is greater than or equal to the external ambient temperature threshold, determine whether the number of defrost cycles of air conditioner 1 during heating operation is greater than or equal to the threshold number of cycles. When the outdoor ambient temperature is determined to be greater than or equal to the external ambient temperature threshold, it indicates that there is a risk of frosting on the outdoor heat exchanger and a risk of significant fluctuations in the indoor coil temperature due to frosting on the outdoor heat exchanger. At this time, it can be further determined whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, so as to control air conditioner 1 to defrost in a timely manner when the indoor coil temperature decays significantly, thereby ensuring the comfort of the indoor environment.

[0057] By setting S11 to S13, the risk of frost formation on the outdoor heat exchanger under the current outdoor ambient temperature can be determined first. Then, based on different frost risks, appropriate defrosting control strategies and procedures can be selected. When the risk of frost formation on the outdoor heat exchanger is low, defrosting control can be performed according to the defrosting control strategies in relevant technologies to avoid frequent defrosting of the air conditioner 1 and the resulting decrease in heating efficiency. However, when there is a risk of frost formation on the outdoor heat exchanger, defrosting control can be performed based on the temperature decay rate of the indoor coil and the operating parameters of the air conditioner 1. This allows for timely defrosting of the air conditioner 1 when the indoor coil temperature drops significantly, maintaining the air outlet temperature of the air conditioner 1 within a relatively warm and comfortable temperature range, thereby ensuring the comfort of the indoor environment.

[0058] like Figure 4 As shown, in some examples, after determining that the outdoor ambient temperature is greater than or equal to the outdoor ambient temperature threshold, and before determining whether the number of defrost cycles of the air conditioner 1 during heating operation is greater than or equal to the threshold number, the air conditioner control method may include S1301 to S1303.

[0059] S1301: Determine whether the temperature difference between the indoor ambient temperature and the set temperature is greater than or equal to the temperature difference threshold.

[0060] Here, the indoor environment temperature can be measured in real time by a temperature sensor arranged on the indoor side. The set temperature is a target temperature expected to be reached by the indoor environment, which can be an input temperature value set manually by a user or a comfort temperature value generated automatically by the air conditioner 1 according to, for example, a use habit of the user, current environment information, or other operating conditions. The temperature difference threshold value can be pre-set in the control system of the air conditioner 1, and is used to determine the difference between the indoor environment temperature and the set temperature, and the operating stage of the air conditioner 1 in the heating operation. The specific value of the temperature difference threshold value can be determined according to actual needs, and embodiments of the present application do not limit the same; for example, the temperature difference threshold value can be 0°C.

[0061] When the temperature difference between the indoor environment temperature and the set temperature is less than the temperature difference threshold value, it indicates that the difference between the indoor environment temperature and the set temperature is large, and the air conditioner 1 is still in the initial stage of the heating operation, and the temperature rise rate of the indoor environment is slow. When the temperature difference between the indoor environment temperature and the set temperature is greater than or equal to the temperature difference threshold value, it indicates that the difference between the indoor environment temperature and the set temperature is small, and the air conditioner 1 has entered the middle stage or reached the temperature stage.

[0062] S1302: In response to determining that the temperature difference between the indoor environment temperature and the set temperature is greater than or equal to the temperature difference threshold value, determining whether the air conditioner 1 is defrosted according to the outdoor coil temperature.

[0063] When it is determined that the temperature difference between the indoor environment temperature and the set temperature is greater than or equal to the temperature difference threshold value, it indicates that the air conditioner 1 has entered the middle stage or reached the temperature stage. At this time, the indoor coil temperature has a small risk of significant fluctuation due to frosting of the outdoor heat exchanger, and defrosting control can be performed according to the defrosting control strategy in the related art to avoid frequent defrosting of the air conditioner 1 and the decline in the heating effect caused by frequent defrosting.

[0064] S1303: In response to determining that the temperature difference between the indoor environment temperature and the set temperature is less than the temperature difference threshold value, determining whether the number of defrosting of the air conditioner 1 in the heating operation is greater than or equal to a threshold number.

[0065] When it is determined that the temperature difference between the indoor environment temperature and the set temperature is less than the temperature difference threshold value, it indicates that the air conditioner 1 is still in the initial stage of the heating operation, and the indoor coil temperature has a large risk of significant fluctuation due to frosting of the outdoor heat exchanger. At this time, it can be further determined whether the temperature decay rate of the indoor coil is greater than a decay rate threshold value, so as to control the air conditioner 1 to defrost in time when the temperature of the indoor coil decays significantly, and ensure the comfort of the indoor environment.

[0066] For example, Figure 5As shown, in some examples, after determining that the number of defrosting is less than the threshold number, before determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, the air conditioner control method can include S2201-S2202.

[0067] S2201: Determine whether the current temperature of the indoor coil is less than or equal to the defrosting temperature threshold.

[0068] Here, the current temperature of the indoor coil can be measured in real time by a temperature sensor arranged on the indoor coil, or can be calculated according to other parameters such as the outlet temperature of the air conditioner 1. The defrosting temperature threshold can be pre-set in the control system of the air conditioner 1 as a critical value for determining whether defrosting is needed.

[0069] S2202: In response to determining that the current temperature of the indoor coil is less than or equal to the defrosting temperature threshold, determine whether the temperature decay rate of the indoor coil is greater than the decay rate threshold.

[0070] When the current temperature of the indoor coil is less than or equal to the defrosting temperature threshold, it indicates that there may be a need for defrosting, and at this time it can be further determined whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, so that the air conditioner 1 can be controlled to defrost in time when the temperature of the indoor coil decays significantly, ensuring the comfort of the indoor environment. When the current temperature of the indoor coil is greater than the defrosting temperature threshold, it indicates that there is no need for defrosting at the moment, and at this time the temperature of the indoor coil can be continuously monitored.

[0071] In some embodiments, before S2201, the air conditioner control method can include S2200.

[0072] S2200: Determine the defrosting temperature threshold according to the outdoor environment temperature.

[0073] Here, the outdoor environment temperature interval can be determined first, and then the corresponding defrosting temperature threshold can be determined according to the temperature interval in which the outdoor environment temperature is located. Here, a plurality of continuously distributed outdoor environment temperature intervals can be pre-set in the control system of the air conditioner 1, and a corresponding defrosting temperature threshold can be set for each outdoor environment temperature interval. The number of outdoor environment temperature intervals and the length of each outdoor environment temperature interval can be determined according to actual needs, which are not limited by the embodiments of the present application; in general, if the number of outdoor environment temperature intervals is large, the number of defrosting temperature thresholds set is large, the matching degree of each defrosting temperature threshold and the outdoor environment temperature interval is high, and the classification accuracy of the defrosting temperature threshold is high; similarly, if the length of each outdoor environment temperature interval is short, the temperature range corresponding to each defrosting temperature threshold is small, the matching degree of each defrosting temperature threshold and the outdoor environment temperature interval is high, and the classification accuracy of the defrosting temperature threshold is high.

[0074] For example, at least three outer ring temperature ranges can be set. These at least three outer ring temperature ranges are: a first outer ring temperature range greater than or equal to the aforementioned outer ring temperature threshold and less than the first outdoor threshold temperature; a second outer ring temperature range greater than or equal to the first outdoor threshold temperature and less than the second outdoor threshold temperature; and a third outer ring temperature range greater than or equal to the second outdoor threshold temperature. The outer ring temperature threshold is less than the first outdoor threshold temperature, and the first outdoor threshold temperature is less than the second outdoor threshold temperature. The specific values ​​of the outer ring temperature threshold, the first outdoor threshold temperature, the second outdoor threshold temperature, and the corresponding defrost temperature threshold can be determined according to actual needs, and this embodiment does not limit this. For example, the range of the outer ring temperature threshold can be -8℃ to -6℃, such as -8℃, -7.5℃, -7℃, -6.5℃, or -6℃, etc.; the range of the first outdoor threshold temperature can be -3℃ to -1℃, such as -3℃, -2.5℃, -2℃, -1.5℃, or -1℃, etc.; and the range of the second outdoor threshold temperature can be 4℃ to 6℃, such as 4℃, 4.5℃, 5℃, 5.5℃, or 6℃, etc.; the first outer ring temperature zone... The defrosting temperature thresholds corresponding to the first outer ring temperature range can be 36-39℃, such as 36℃, 37℃, 38℃, 38.5℃, or 39℃. The defrosting temperature thresholds corresponding to the second outer ring temperature range can be 41℃-43℃, such as 41℃, 41.5℃, 42℃, 42.5℃, or 43℃. The defrosting temperature thresholds corresponding to the third outer ring temperature range can be 45℃-47℃, such as 45℃, 45.5℃, 46℃, 46.5℃, or 47℃.

[0075] By setting S2200 to determine the corresponding defrost temperature threshold based on the outdoor ambient temperature, the air conditioner control method provided in this application embodiment can comprehensively consider the influence of the outdoor ambient temperature on defrost conditions, thereby improving the timeliness of defrost control and the accuracy of judging the defrost timing.

[0076] like Figure 6 As shown, in some embodiments, before S31, the air conditioner control method may include S01 to S02.

[0077] S01: Determine whether the operating parameters of air conditioner 1 remain unchanged within a preset time period during heating operation. Here, the preset time period can be pre-set in the control system of air conditioner 1.

[0078] Further, it can be determined whether the operation parameter of the air conditioner 1 in the heating operation is maintained unchanged within a second preset time length after the air conditioner 1 enters the heating operation for a first preset time length. The first preset time length and the second preset time length can be preset in the control system of the air conditioner 1, and the second preset time length is less than the first preset time length. For example, the first preset time length can be 10 minutes, and the second preset time length can be 3 minutes. In this way, it can be determined whether the operation parameter of the air conditioner 1 in the heating operation is maintained unchanged within 3 minutes after the air conditioner 1 enters the heating operation for 10 minutes. In this way, it can be more accurate to determine whether the air conditioner 1 is in a stable operation state, and to reduce interference factors such as the initial stage.

[0079] S02: In response to determining that the operation parameter of the air conditioner 1 after entering the heating operation is maintained unchanged within a preset time length, the operation parameter is taken as the stable operation parameter of the air conditioner 1. If the length of time that the air conditioner 1 continuously operates in the heating operation according to an operation parameter reaches the preset time length, it can be determined that the air conditioner 1 has reached a stable operation state. At this time, the operation parameter can be taken as the stable operation parameter of the air conditioner 1.

[0080] Further, if the length of time that the air conditioner 1 continuously operates in the heating operation according to an operation parameter reaches a second preset time length after the air conditioner 1 enters the heating operation for a first preset time length, the operation parameter can be taken as the stable operation parameter of the air conditioner 1.

[0081] By setting S01-S02, the corresponding stable operation parameter can be determined according to the current heating operation condition of the air conditioner 1, so that the determined stable operation parameter is more matched to the current operation condition.

[0082] As shown in FIG. 3B, in some embodiments, before S31, the air conditioner control method can include S301-S302. Figure 7

[0083] S301: Obtain the highest temperature and the current temperature of the indoor coil in the heating operation.

[0084] S302: Calculate the ratio of the current temperature and the highest temperature of the indoor coil, and take the ratio as the temperature decay rate of the indoor coil. Accordingly, the decay rate threshold can be a ratio threshold, that is, a decimal value between 0 and 1.

[0085] In another example, the difference between the highest temperature and the current temperature of the indoor coil can be calculated, and the difference is taken as the temperature decay rate of the indoor coil. Accordingly, the decay rate threshold can be a difference threshold, which has a unit of °C.

[0086] ​In a second aspect, the embodiments of the present application provide an air conditioner control device, which comprises a first comparison circuit, a second comparison circuit, a first control circuit and a second control circuit. The first comparison circuit is configured to determine whether a temperature decay rate of an indoor coil is greater than a decay rate threshold in response to the air conditioner 1 being in a heating operation. The second comparison circuit is configured to determine whether current operation parameters of the air conditioner 1 are consistent with stable operation parameters in response to determining that the temperature decay rate of the indoor coil is greater than the decay rate threshold, the operation parameters comprising a compressor operation frequency, an indoor fan rotating speed and an outdoor fan rotating speed. The first control circuit is configured to control the air conditioner 1 to defrost in response to determining that the current operation parameters of the air conditioner 1 are consistent with the stable operation parameters. The second control circuit is configured to determine whether the air conditioner 1 defrosts according to an outdoor coil temperature in response to determining that the current operation parameters of the air conditioner 1 are inconsistent with the stable operation parameters.

[0087] As shown in Figure 8 In a third aspect, the embodiments of the present application provide an air conditioner 1, which comprises a processor 10 and a memory 20, and the memory 20 stores a computer program, which is executed by the processor 10 to implement the air conditioner control method provided in any of the above embodiments. The type of the air conditioner 1 can be determined according to actual needs, and types such as wall-mounted air conditioners, cabinet air conditioners, window air conditioners and the like can be used, which are not limited in the embodiments of the present application.

[0088] The processor 10 is connected to the memory 20 and can perform various actions and processes according to the program stored in the memory 20. Specifically, the processor 10 can be an integrated circuit chip with signal processing capability. The processor 10 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a ready programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor or the like, which can be of X86 architecture or ARM architecture.

[0089] The memory 20 can be volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory can be read only memory (ROM), programmable read only memory (PROM), erasable programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as external cache. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), SynchBurst Dynamic Random Access Memory (SLDRAM), and Direct Rambus Dynamic Random Access Memory (DRRAM). Note that the memory 20 of the methods described herein is intended to include, without being limited to, these and any other suitable types of memory.

[0090] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, having stored thereon a computer program, the computer program being loaded by the processor 10 to execute the steps in the control method of any of the above embodiments.

[0091] By way of example, and not limitation, computer readable storage media can include volatile and non-volatile, removable and non-removable media implemented in a method or technology for storage and / or transmission of information such as computer readable instructions, data structures, program modules or other data. For example, computer readable storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, host memory (e.g., random access memory, buffers, caches, and the like), or any other medium that can be used to store and / or transfer information in a way that can be read by an apparatus. Also, computer readable storage media can include any medium that is capable of storing or encoding a desired sequence of instructions for execution by the apparatus and that causes the apparatus to perform any one of the methodologies of the present application. The computer readable storage media described herein can represent one or more devices and / or other machine readable media for storing information. The term "machine readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and / or carrying instruction and / or data.

[0092] The above describes in detail the air conditioner and the control method, device and computer readable storage medium thereof provided by the embodiments of the present application. The principles and implementation manners of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method and core idea of the present application. Meanwhile, according to the idea of the present application, the specific implementation manners and application range can be changed by those skilled in the art. In summary, the content of the specification should not be understood as limiting the present application.

Claims

1. An air conditioner control method, characterized in that, include: In response to the air conditioner being in heating mode, determine whether the temperature decay rate of the indoor coil is greater than the decay rate threshold. In response to determining that the temperature decay rate of the indoor coil is greater than the decay rate threshold, it is determined whether the current operating parameters of the air conditioner are consistent with the stable operating parameters, including the compressor operating frequency, indoor fan speed and outdoor fan speed; In response to determining that the current operating parameters and stable operating parameters of the air conditioner are consistent, the air conditioner is controlled to defrost. In response to the determination that the current operating parameters and stable operating parameters of the air conditioner are inconsistent, the air conditioner is determined to defrost based on the outdoor coil temperature. If the current operating parameters and stable operating parameters of the air conditioner are exactly the same, or if the difference or ratio between the current operating parameters and stable operating parameters of the air conditioner is within a preset range, then the current operating parameters and stable operating parameters of the air conditioner are determined to be consistent.

2. The air conditioner control method according to claim 1, characterized in that, Before determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, the air conditioner control method includes: Determine whether the number of defrost cycles of the air conditioner during heating operation is greater than or equal to a threshold number; In response to determining that the number of defrost cycles is less than a threshold number, determine whether the temperature decay rate of the indoor coil is greater than the decay rate threshold. In response to determining that the number of defrost cycles is greater than or equal to a threshold number, the system determines whether the air conditioner should defrost based on the outdoor coil temperature.

3. The air conditioner control method according to claim 2, characterized in that, Before determining whether the number of defrost cycles during heating operation is greater than or equal to a threshold number, the air conditioner control method includes: Determine whether the outdoor ambient temperature is lower than the external ambient temperature threshold. In response to determining that the outdoor ambient temperature is lower than the outdoor ambient temperature threshold, the system determines whether the air conditioner should defrost based on the outdoor coil temperature. In response to determining that the outdoor ambient temperature is greater than or equal to an external ambient temperature threshold, it is determined whether the number of defrost cycles of the air conditioner during the heating operation is greater than or equal to the threshold number of cycles.

4. The air conditioner control method according to claim 3, characterized in that, After determining that the outdoor ambient temperature is greater than or equal to an outdoor ambient temperature threshold, but before determining whether the number of defrost cycles during the heating operation of the air conditioner is greater than or equal to a threshold number, the air conditioner control method includes: Determine whether the temperature difference between the indoor ambient temperature and the set temperature is greater than or equal to the temperature difference threshold. In response to determining that the temperature difference between the indoor ambient temperature and the set temperature is greater than or equal to a temperature difference threshold, the system determines whether the air conditioner should defrost based on the outdoor coil temperature. In response to determining that the temperature difference between the indoor ambient temperature and the set temperature is less than a temperature difference threshold, it is determined whether the number of defrost cycles of the air conditioner during the heating operation is greater than or equal to the threshold number of cycles.

5. The air conditioner control method according to claim 2, characterized in that, After determining that the number of defrost cycles is less than a threshold number, and before determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, the air conditioner control method includes: Determine whether the current temperature of the indoor coil is less than or equal to the defrost temperature threshold; In response to determining that the current temperature of the indoor coil is less than or equal to the defrost temperature threshold, it is determined whether the temperature decay rate of the indoor coil is greater than the decay rate threshold.

6. The air conditioner control method according to claim 5, characterized in that, Before determining whether the current temperature of the indoor coil is less than or equal to the defrost temperature threshold, the air conditioner control method includes: The defrost temperature threshold is determined based on the outdoor ambient temperature.

7. The air conditioner control method according to claim 1, characterized in that, Before determining whether the temperature decay rate of the indoor coil is greater than the decay rate threshold, the air conditioner control method includes: Determine whether the operating parameters of the air conditioner remain unchanged within a preset time period during the heating operation; In response to determining that the operating parameters of the air conditioner remain unchanged within a preset time after entering the heating operation, the operating parameters are taken as the stable operating parameters of the air conditioner.

8. An air conditioner control device, characterized in that, include: The first comparison circuit is configured to determine whether the temperature decay rate of the indoor coil is greater than the decay rate threshold in response to the air conditioner being in heating operation. The second comparison circuit is configured to determine whether the current operating parameters of the air conditioner are consistent with the stable operating parameters in response to determining that the temperature decay rate of the indoor coil is greater than the decay rate threshold. The operating parameters include the compressor operating frequency, the indoor fan speed, and the outdoor fan speed. If the current operating parameters of the air conditioner are exactly the same as the stable operating parameters, or if the difference or ratio between the current operating parameters and the stable operating parameters is within a preset difference or ratio range, the circuit determines that the current operating parameters of the air conditioner are consistent with the stable operating parameters. The first control circuit is configured to control the air conditioner to defrost in response to determining that the current operating parameters and stable operating parameters of the air conditioner are consistent. The second control circuit is configured to determine whether the air conditioner should defrost based on the outdoor coil temperature in response to a discrepancy between the current operating parameters and the stable operating parameters of the air conditioner.

9. An air conditioner, characterized in that, include: Memory, which stores computer programs; A processor, wherein the computer program, when executed by the processor, implements the air conditioner control method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps of the air conditioner control method according to any one of claims 1 to 7.

Images