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

Abstract

This invention provides a defrosting control method, apparatus, device, storage medium, and air conditioner for an air conditioner, relating to the field of air conditioner technology. The method includes: detecting the outdoor ambient temperature during air conditioner operation using an outdoor ambient temperature sensor, and detecting the external coil temperature at the second fan coil unit using an external coil temperature sensor; determining a first average current value corresponding to a first fan and a second average current value corresponding to the second fan based on the outdoor ambient temperature and the external coil temperature; and controlling the air conditioner to execute a target defrosting mode based on the first and second average current values. This invention enables the air conditioner to defrost in a target defrosting mode at the optimal defrosting time, improving both defrosting efficiency and indoor heating efficiency.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner defrosting control method, device, equipment, storage medium, and air conditioner. Background Technology

[0002] Air conditioners are devices that regulate indoor temperature. In related technologies, the defrosting timing of air conditioners is typically determined by detecting the frost thickness using a defrost coil sensor for each fan unit. However, for multi-fan units, such as dual-fan air conditioners, some manufacturers, in order to save costs, only equip them with a single defrost coil sensor to determine the defrosting timing.

[0003] However, dual-fan air conditioners inevitably experience uneven heat exchange due to differences in outdoor unit piping design and air resistance. During heating, the frost thickness behind the two fans may differ, for example, the upper fan may have thinner frost while the lower fan has thicker frost. If only one defrost coil sensor is installed at the upper fan, and the frost level on the upper fan hasn't yet triggered the defrost mechanism compared to the defrost thickness threshold, while the lower fan already has a very thick frost layer, it will significantly impact the air conditioner's heating efficiency. Conversely, setting the defrost thickness threshold too low will lead to frequent defrosting, also significantly affecting heating efficiency.

[0004] Therefore, how to defrost multi-fan air conditioners, especially dual-fan air conditioners, is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This invention provides a defrosting control method, apparatus, device, storage medium, and air conditioner for an air conditioner, which solves the problem of low heating efficiency caused by the low accuracy of determining the defrosting timing in existing dual-fan air conditioners with only one defrosting sensor. The invention enables the air conditioner to defrost in the target defrosting mode at the optimal defrosting time, thereby improving both defrosting efficiency and indoor heating efficiency.

[0006] In a first aspect, the present invention provides an application for an air conditioner, the air conditioner comprising at least an outdoor unit and an indoor unit; the outdoor unit comprising at least a first fan, a second fan, an outdoor coil temperature sensor, and an outdoor ambient temperature sensor, the outdoor coil temperature sensor being disposed at the coil of the second fan; the defrosting control method for the air conditioner comprising: The outdoor ambient temperature sensor is used to detect the outdoor ambient temperature when the air conditioner is running, and the outdoor coil temperature sensor is used to detect the outdoor coil temperature at the second fan coil unit. Based on the outdoor ambient temperature and the external coil temperature, a first average current value corresponding to the first fan and a second average current value corresponding to the second fan are determined. Based on the first average current value and the second average current value, the air conditioner is controlled to execute the target defrost mode.

[0007] Preferably, in the air conditioner defrosting control method provided by the present invention, the target defrosting mode includes at least: a normal defrosting mode; The step of controlling the air conditioner to execute the target defrost mode based on the first average current value and the second average current value includes: The first average current and the second average current are compared to obtain the current comparison result. If the current comparison result indicates that the first average current value and the second average current value are the same, the air conditioner is controlled to perform a normal defrost mode.

[0008] Preferably, in the air conditioner defrosting control method provided by the present invention, the indoor unit includes at least: an infrared sensor; After comparing the first average current value and the second average current value to obtain the current comparison result, the method further includes: The infrared sensor is used to detect users in the indoor space; If the comparison result indicates that the first average current value and the second average current value are different, and the user is not present in the indoor space, the air conditioner is controlled to perform a normal defrost mode.

[0009] Preferably, according to the air conditioner defrosting control method provided by the present invention, the indoor unit further includes at least: an indoor ambient temperature sensor; The target defrosting mode also includes at least: an enhanced defrosting mode; Following the step of detecting users in the indoor space using the infrared sensor, the method further includes: When the current comparison result indicates that the first average current value and the second average current value are different, and the user is present in the indoor space, the indoor ambient temperature sensor is used to detect the indoor ambient temperature of the indoor space, and a set temperature corresponding to the indoor space is obtained. Based on the indoor ambient temperature and the set temperature, the air conditioner is controlled to execute the enhanced defrosting mode.

[0010] Preferably, in the air conditioner defrosting control method provided by the present invention, controlling the air conditioner to execute the enhanced defrosting mode based on the indoor ambient temperature and the set temperature includes: The indoor ambient temperature and the set temperature are calculated to obtain the indoor temperature difference. The indoor temperature difference is compared with a preset temperature threshold to obtain a first temperature comparison result, and the indoor ambient temperature is compared with the set temperature to obtain a second temperature comparison result. If the first temperature comparison result indicates that the indoor temperature difference is greater than or equal to the preset temperature threshold, and the second temperature comparison result indicates that the indoor ambient temperature is greater than or equal to the set temperature, the air conditioner is controlled to execute the enhanced defrosting mode. When the first temperature comparison result indicates that the indoor temperature difference is greater than or equal to the preset temperature threshold, and the second temperature comparison result indicates that the indoor ambient temperature is less than the set temperature, the fan speeds of the first fan and the second fan are increased respectively, and the first fan and the second fan are controlled to run at the new fan speed for a first duration respectively. When the first duration reaches the preset duration threshold, the air conditioner is controlled to execute the enhanced defrosting mode. If the first temperature comparison result indicates that the indoor temperature difference is less than the preset temperature threshold, the first fan and the second fan are controlled to run at the original fan speed for a second duration, and if the second duration reaches the preset duration threshold, the air conditioner is controlled to execute the enhanced defrosting mode.

[0011] Preferably, in the air conditioner defrosting control method provided by the present invention, determining the first average current value corresponding to the first fan based on the outdoor ambient temperature and the outdoor coil temperature includes: The outdoor ambient temperature and the outdoor temperature threshold are compared to obtain a third temperature comparison result, and the external coil temperature and the external coil temperature threshold are compared to obtain a fourth temperature comparison result. When the third temperature comparison result indicates that the outdoor ambient temperature is less than the outdoor temperature threshold, and the fourth temperature comparison result indicates that the external coil temperature is less than the external coil temperature threshold, the initial current value, the intermediate current value, and the final current value of the first fan at the initial moment of operation at the target speed are collected. The initial current value at the initial moment, the intermediate current value at the intermediate moment, and the final current value at the final moment are calculated and processed to obtain the first average current value corresponding to the first fan.

[0012] Secondly, the present invention also provides an air conditioner defrosting control device, applied to an air conditioner, the air conditioner comprising at least: an outdoor unit and an indoor unit; the outdoor unit comprising at least: a first fan, a second fan, an outdoor coil temperature sensor, and an outdoor ambient temperature sensor, the outdoor coil temperature sensor being disposed at the coil of the second fan; the air conditioner defrosting control device comprising: The detection module is used to detect the outdoor ambient temperature when the air conditioner is running using the outdoor ambient temperature sensor, and to detect the temperature of the external coil at the second fan coil unit using the external coil temperature sensor. The determination module is used to determine a first average current value corresponding to the first fan and a second average current value corresponding to the second fan based on the outdoor ambient temperature and the external coil temperature. The control module is used to control the air conditioner to execute a target defrosting mode based on the first average current value and the second average current value.

[0013] Thirdly, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the defrosting control method for an air conditioner as described above.

[0014] Fourthly, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the air conditioner defrosting control method as described above.

[0015] Fifthly, the present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the air conditioner defrosting control method as described above.

[0016] In a sixth aspect, the present invention also provides an air conditioner, including an outdoor unit and an indoor unit, wherein the outdoor unit includes at least: a first fan, a second fan, an external coil temperature sensor and an outdoor ambient temperature sensor, the external coil temperature sensor being disposed at the coil of the second fan, and the air conditioner further includes at least the aforementioned air conditioner defrosting control device.

[0017] This invention provides an air conditioner defrosting control method, apparatus, device, storage medium, and air conditioner. It utilizes an outdoor ambient temperature sensor to detect the outdoor ambient temperature during air conditioner operation and an external coil temperature sensor to detect the external coil temperature at the second fan coil unit. Based on the outdoor ambient temperature and the external coil temperature, it determines a first average current value corresponding to the first fan and a second average current value corresponding to the second fan. Based on the first and second average current values, it controls the air conditioner to execute a target defrosting mode. This addresses the shortcomings of existing dual-fan air conditioners with only one defrosting sensor, where low accuracy in determining the defrosting timing leads to low heating efficiency. By controlling the air conditioner to defrost in the target defrosting mode at the optimal defrosting time, it improves both defrosting efficiency and indoor heating efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is one of the flowcharts illustrating the defrosting control method for air conditioners provided by the present invention.

[0020] Figure 2 This is the second flowchart of the air conditioner defrosting control method provided by the present invention.

[0021] Figure 3 This is a schematic diagram of the defrosting control device for an air conditioner provided by the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] First, let's analyze some of the terms used in this invention: Frosting principle: When the surface temperature of the air conditioner evaporator is lower than the dew point temperature, the moisture in the air condenses and accumulates into frost. It is mainly affected by the evaporator temperature and air humidity.

[0025] Areas prone to frost buildup: The evaporator is the most prone to frost buildup. The indoor unit's air inlet and panel are also prone to frost buildup.

[0026] Consequences of Frosting: Frosting affects the evaporator by increasing thermal resistance due to the frost layer, and by obstructing airflow, thus increasing resistance to airflow through the evaporator. Based on fan characteristics, increased resistance leads to reduced airflow, which in turn decreases the surface heat transfer coefficient and increases energy consumption. The reduced airflow caused by frost is a major factor contributing to the deterioration of system operation.

[0027] In the relevant technologies, at least the following technical problems exist: For air conditioners with dual fans, some manufacturers, in order to save costs, only equip them with a single defrost coil sensor to determine when to defrost.

[0028] However, dual-fan air conditioners inevitably experience uneven heat exchange due to differences in outdoor unit piping design and air resistance. During heating, the frost thickness behind the two fans may differ, for example, the upper fan may have thinner frost while the lower fan has thicker frost. If only one defrost coil sensor is installed at the upper fan, and the frost level on the upper fan hasn't yet triggered the defrost mechanism compared to the defrost thickness threshold, while the lower fan already has a very thick frost layer, it will significantly impact the air conditioner's heating efficiency. Conversely, setting the defrost thickness threshold too low will lead to frequent defrosting, also significantly affecting heating efficiency.

[0029] Therefore, how to defrost multi-fan air conditioners, especially dual-fan air conditioners, is a technical problem that urgently needs to be solved.

[0030] The following is combined with Figures 1-4 This invention describes an air conditioner defrosting control method, apparatus, device, storage medium, and air conditioner, which addresses the shortcomings of existing dual-fan air conditioners with only one defrost sensor, where the accuracy of determining the defrosting timing is low, leading to low heating efficiency. The invention enables the air conditioner to defrost at the optimal time using a target defrosting mode, thereby improving both defrosting efficiency and indoor heating efficiency.

[0031] In an embodiment of the present invention, an air conditioner is described, including a controller, an outdoor unit, and an indoor unit; the outdoor unit includes at least: a first fan, a second fan, an external coil temperature sensor, and an outdoor ambient temperature sensor, wherein the external coil temperature sensor is disposed at the coil of the second fan and is used to detect the temperature of the external coil at the coil of the second fan.

[0032] It should be noted that, in this embodiment of the invention, the frosting condition at the second fan can be determined based on the temperature of the external coil at the second fan. However, the temperature of the external coil at the first fan cannot be determined, and therefore the frosting condition at the first fan cannot be determined either.

[0033] It should be further noted that there are no further limitations on the positions of the first and second fans. The first fan can be positioned above or to the left of the second fan. Similarly, the second fan can be positioned above or to the left of the first fan.

[0034] Figure 1 This is one of the flowcharts illustrating an air conditioner defrosting control method provided by the present invention, such as... Figure 1 As shown, the method may include, but is not limited to, steps S100 to S300: S100, the outdoor ambient temperature sensor is used to detect the outdoor ambient temperature when the air conditioner is running, and the outdoor coil temperature sensor is used to detect the outdoor coil temperature at the second fan coil unit. S200, based on the outdoor ambient temperature and the external coil temperature, determine the first average current value corresponding to the first fan and the second average current value corresponding to the second fan; S300, based on the first average current value and the second average current value, control the air conditioner to execute the target defrost mode.

[0035] In step S100 of some embodiments, the outdoor ambient temperature is detected by the outdoor ambient temperature sensor when the air conditioner is running, and the temperature of the external coil at the second fan coil unit is detected by the external coil temperature sensor.

[0036] It should be noted that after the air conditioner is started and running, the outdoor ambient temperature is detected by the outdoor ambient temperature sensor and set as T1. The outdoor coil temperature is detected by the outdoor coil temperature sensor and set as T2.

[0037] In step S200 of some embodiments, a first average current value corresponding to the first fan and a second average current value corresponding to the second fan are determined based on the outdoor ambient temperature and the external coil temperature.

[0038] It is understood that the step of determining the average value of the first current corresponding to the first fan based on the outdoor ambient temperature and the external coil temperature can specifically be as follows: The outdoor ambient temperature and the outdoor temperature threshold are compared to obtain a third temperature comparison result, and the external coil temperature and the external coil temperature threshold are compared to obtain a fourth temperature comparison result.

[0039] When the third temperature comparison result indicates that the outdoor ambient temperature is less than the outdoor temperature threshold, and the fourth temperature comparison result indicates that the external coil temperature is less than the external coil temperature threshold, the initial current value, the intermediate current value, and the final current value of the first fan at the target speed are collected at the initial moment, the intermediate moment, and the final moment.

[0040] The initial current value at the initial moment, the intermediate current value at the intermediate moment, and the final current value at the final moment are calculated and processed to obtain the first average current value corresponding to the first fan.

[0041] It should be noted that the outdoor temperature threshold is P1, which can be 10 degrees Celsius. The outdoor coil temperature threshold is P2, which can be 0 degrees Celsius.

[0042] If the third temperature comparison result indicates that the outdoor ambient temperature is lower than the outdoor temperature threshold, and the fourth temperature comparison result indicates that the outdoor coil temperature is lower than the outdoor coil temperature threshold, it indicates that the outdoor environment where the air conditioner is currently located is prone to frost formation. To further determine the defrosting timing, the fan speeds of the first and second fans of the air conditioner can be simultaneously increased to 600 rpm and run continuously for 30 seconds. In this scenario, the initial current value M1 of the first fan at the initial moment of operation at the target speed, the intermediate current value M2 at the intermediate moment, and the final current value M3 at the final moment are collected. Then, according to (M1+M2+M3) / 3=M4, M4 is the first average current value of the first fan. Similarly, the second average current value of the second fan can be calculated, and let the second average current value of the second fan be M5.

[0043] Further calculations are performed on the first average current M4 of the first fan and the second average current M5 of the second fan. In order to compare whether the first average current M4 of the first fan and the second average current M5 of the second fan are equal, the deviation value a of the first fan and the deviation value b of the second fan are calculated. Based on the deviation value a of the first fan and the deviation value b of the second fan, it is determined whether the first average current M4 of the first fan and the second average current M5 of the second fan are equal.

[0044] The specific steps for calculating the deviation value 'a' of the first fan and the deviation value 'b' of the second fan are as follows: a = |(M4-M5) / M4|, b = |(M4-M5) / M5|.

[0045] If a≤5% and b≤5%, then M4=M5, that is, the first average current M4 of the first fan and the second average current M5 of the second fan are equal, and the frost thickness at the outer coil of the first and second fans is considered to be the same.

[0046] If either a or b has a deviation value greater than 5%, then M4 is considered not to be M5. If the first average current value M4 of the first fan and the second average current value M5 of the second fan are not equal, then the frost thickness at the outer coil of the first fan and the second fan is considered not to be consistent.

[0047] In step S300 of some embodiments, the air conditioner is controlled to perform a target defrost mode based on the first average current value and the second average current value.

[0048] It should be noted that the target defrosting mode includes at least the normal defrosting mode.

[0049] The step of controlling the air conditioner to execute the target defrost mode based on the first average current value and the second average current value includes: The first average current and the second average current are compared to obtain the current comparison result. If the current comparison result indicates that the first average current value and the second average current value are the same, the air conditioner is controlled to perform a normal defrost mode.

[0050] Since the average first current M4 of the first fan and the average second current M5 of the second fan are equal, it is assumed that the frost thickness at the external coil of the first and second fans is the same. Therefore, the air conditioner is controlled to perform normal defrosting mode.

[0051] Normal defrosting mode controls the air conditioner compressor to operate at the normal defrosting frequency and fan speed to defrost the frosted area on the outdoor coil of the air conditioner.

[0052] In some embodiments of the present invention, the indoor unit includes at least: an infrared sensor; After comparing the first average current value and the second average current value to obtain the current comparison result, the method further includes: The infrared sensor is used to detect users in the indoor space; If the comparison result indicates that the first average current value and the second average current value are different, and the user is not present in the indoor space, the air conditioner is controlled to perform a normal defrost mode.

[0053] It is understandable that by using the infrared sensor to detect users in an indoor space, it is possible to determine whether a user is in an indoor space.

[0054] If the average first current and the average second current are different, meaning the degree of frost on the first and second fans differs (e.g., the first fan has less frost while the second fan has more), then the first fan hasn't reached the defrosting point and can still heat the room. However, if the room is detected to be empty, such as when the user has gone to the kitchen to cook, then it's the optimal time to defrost. Of course, the duration of vacancy in the room needs to be analyzed. Only when the duration of vacancy is greater than or equal to a preset threshold is the room considered temporarily empty.

[0055] Defrosting can be performed when the user is briefly away from the room. By the time the user returns, the defrosting is complete, which will not affect the heating of the room and can greatly improve the user experience.

[0056] Conversely, if defrosting is not performed at this time, but instead the system continues to run and waits for the first fan to reach its defrosting time, it is possible that the user has just finished cooking and entered the room, at which point both the first and second fans of the air conditioner have reached their defrosting time. This will inevitably affect indoor heating and the user experience. However, the technical methods described above can effectively solve this problem.

[0057] In some embodiments of the present invention, the indoor unit further includes at least: an indoor ambient temperature sensor; The target defrosting mode also includes at least: an enhanced defrosting mode; Following the step of detecting users in the indoor space using the infrared sensor, the method further includes: When the current comparison result indicates that the first average current value and the second average current value are different, and the user is present in the indoor space, the indoor ambient temperature sensor is used to detect the indoor ambient temperature of the indoor space, and a set temperature corresponding to the indoor space is obtained. Based on the indoor ambient temperature and the set temperature, the air conditioner is controlled to execute the enhanced defrosting mode.

[0058] Understandably, the enhanced defrost mode, based on the normal defrost mode, controls the air conditioner compressor to operate at a target defrost frequency and the fan speed to also operate at a target speed, in order to defrost the frost-covered areas on the outdoor coil of the air conditioner. The target defrost frequency is 10 Hz higher than the defrost frequency corresponding to the normal defrost mode, and the target speed is 100 RPM higher than the fan speed corresponding to the normal defrost mode, thereby shortening the defrost time and accelerating the defrost efficiency.

[0059] If the current comparison result indicates that the first average current and the second average current are different, and the user is present in the indoor space (i.e., the frosting levels of the first and second fans are different, and the user is in the indoor space), then further analysis is needed to determine whether this is the optimal time for defrosting. The specific analysis steps are as follows: The indoor ambient temperature sensor is used to detect the indoor ambient temperature of the indoor space and to obtain the set temperature corresponding to the indoor space.

[0060] The indoor ambient temperature and the set temperature are calculated to obtain the indoor temperature difference.

[0061] Let the indoor ambient temperature be T3, the set temperature be T4, the preset temperature threshold be P3, and the indoor temperature difference be T5.

[0062] T5 = T3 - T4.

[0063] The indoor temperature difference is compared with a preset temperature threshold to obtain a first temperature comparison result, and the indoor ambient temperature is compared with the set temperature to obtain a second temperature comparison result.

[0064] When the first temperature comparison result indicates that the indoor temperature difference is greater than or equal to the preset temperature threshold, and the second temperature comparison result indicates that the indoor ambient temperature is greater than or equal to the set temperature, the air conditioner is controlled to execute the enhanced defrosting mode.

[0065] In this scenario, the first and second fans have different levels of frost buildup, and the actual indoor temperature is higher than the set temperature. For example, if the user uses another heater to assist in heating, causing the indoor temperature to be higher than the air conditioner's set temperature, then the indoor heating is already quite good. In this case, defrosting will not affect the indoor heating efficiency. Therefore, the enhanced defrosting mode needs to be used to achieve rapid defrosting.

[0066] When the first temperature comparison result indicates that the indoor temperature difference is greater than or equal to the preset temperature threshold, and the second temperature comparison result indicates that the indoor ambient temperature is less than the set temperature, the fan speeds of the first fan and the second fan are increased respectively, and the first fan and the second fan are controlled to run at the new fan speed for a first duration respectively. When the first duration reaches the preset duration threshold, the air conditioner is controlled to execute the enhanced defrosting mode.

[0067] In this scenario, the first and second fans have different levels of frost buildup, and the actual indoor temperature is lower than the set temperature. This is because the frost buildup on the external coils of the fans is affecting indoor heating. Therefore, it is necessary to increase the fan speeds of both the first and second fans and control them to operate at the new fan speeds for a first duration. This increases the fan speeds of both fans, improving indoor heating and raising the indoor temperature above the set temperature. Then, controlling the air conditioner to execute the enhanced defrost mode will further improve indoor heating during rapid defrosting, allowing users to enjoy comfortable heating. Controlling the air conditioner to use the enhanced defrost mode can significantly shorten defrost time.

[0068] If the first temperature comparison result indicates that the indoor temperature difference is less than the preset temperature threshold, the first fan and the second fan are controlled to run at the original fan speed for a second duration, and if the second duration reaches the preset duration threshold, the air conditioner is controlled to execute the enhanced defrosting mode.

[0069] In this scenario, the first and second fans have different levels of frost buildup, and the indoor temperature difference is less than the preset temperature threshold. This means that the indoor ambient temperature and the set temperature are almost the same, indicating that the current heating effect is acceptable and can meet the user's heating needs. In this case, the first and second fans are controlled to run at their original fan speeds for a second duration. Once the second duration reaches the preset duration threshold, heating continues without defrosting. After the second duration reaches the preset duration threshold, the air conditioner is controlled to execute the enhanced defrosting mode.

[0070] Figure 2 This is a second flowchart illustrating an air conditioner defrosting control method provided by the present invention. The dual-fan outdoor unit of the air conditioner operates normally. It determines whether the outdoor ambient temperature T1 is less than the outdoor temperature threshold P1. If the outdoor ambient temperature is less than the outdoor temperature threshold, it determines whether the outdoor coil temperature T2 is less than the outdoor coil temperature threshold P2. If the outdoor coil temperature is less than the outdoor coil temperature threshold, it determines the first average current M4 of the first fan and the second average current M5 of the second fan. It then determines whether the first average current and the second average current are the same. If they are the same, it indicates that the frost thickness of the first fan and the second fan is consistent, and the air conditioner is then controlled to execute a normal defrosting procedure.

[0071] If the average value of the first current and the average value of the second current are different, it means that the frost thickness of the first fan and the second fan is inconsistent. At this time, an infrared sensor can be used to detect whether there are users in the indoor space. If there are users, the air conditioner is controlled to perform an enhanced defrosting program. If there are no users, the air conditioner is controlled to perform a normal defrosting program.

[0072] In embodiments of the present invention, a step of exiting the defrost mode is also included. For example, after the air conditioner enters the defrost mode, the temperature of the outdoor coil of the air conditioner is detected. When the temperature of the outdoor coil is higher than the set temperature (which can be reasonably set by those skilled in the art according to the actual application scenario of the air conditioner), the continuous running time of the air conditioner in this state is detected. When the continuous running time is higher than a first preset time, for example, the continuous running time is higher than 20 seconds (or any time between 15 and 25 seconds), it can be determined that the frost layer on the outdoor coil has been completely removed. At this time, the air conditioner exits the defrost mode.

[0073] This invention provides an air conditioner defrosting control method, apparatus, device, storage medium, and air conditioner. It utilizes an outdoor ambient temperature sensor to detect the outdoor ambient temperature during air conditioner operation and an external coil temperature sensor to detect the external coil temperature at the second fan coil unit. Based on the outdoor ambient temperature and the external coil temperature, it determines a first average current value corresponding to the first fan and a second average current value corresponding to the second fan. Based on the first and second average current values, it controls the air conditioner to execute a target defrosting mode. This addresses the shortcomings of existing dual-fan air conditioners with only one defrosting sensor, where low accuracy in determining the defrosting timing leads to low heating efficiency. By controlling the air conditioner to defrost in the target defrosting mode at the optimal defrosting time, it improves both defrosting efficiency and indoor heating efficiency.

[0074] The defrosting control device for air conditioners provided by the present invention is described below. The defrosting control device described below and the defrosting control method described above can be referred to in correspondence.

[0075] like Figure 3 The diagram shows a structural schematic of an air conditioner defrosting control device provided by the present invention. The air conditioner defrosting control device is applied to an air conditioner, which includes at least an outdoor unit and an indoor unit. The outdoor unit includes at least a first fan, a second fan, an outdoor coil temperature sensor, and an outdoor ambient temperature sensor. The outdoor coil temperature sensor is disposed at the coil of the second fan. The air conditioner defrosting control device includes: The detection module is used to detect the outdoor ambient temperature when the air conditioner is running using the outdoor ambient temperature sensor, and to detect the temperature of the external coil at the second fan coil unit using the external coil temperature sensor. The determination module is used to determine a first average current value corresponding to the first fan and a second average current value corresponding to the second fan based on the outdoor ambient temperature and the external coil temperature. The control module is used to control the air conditioner to execute a target defrosting mode based on the first average current value and the second average current value.

[0076] Preferably, the target defrosting mode includes at least: a normal defrosting mode; The defrosting control device for air conditioners provided by the present invention is specifically used to compare the first average current value and the second average current value to obtain a current comparison result; If the current comparison result indicates that the first average current value and the second average current value are the same, the air conditioner is controlled to perform a normal defrost mode.

[0077] Preferably, the defrosting control device for an air conditioner provided by the present invention is specifically used in the indoor unit and includes at least: an infrared sensor; The infrared sensor is used to detect users in the indoor space; If the comparison result indicates that the first average current value and the second average current value are different, and the user is not present in the indoor space, the air conditioner is controlled to perform a normal defrost mode.

[0078] Preferably, the defrosting control device for an air conditioner provided by the present invention, specifically used in the indoor unit, further includes at least: an indoor ambient temperature sensor; The target defrosting mode also includes at least: an enhanced defrosting mode; When the current comparison result indicates that the first average current value and the second average current value are different, and the user is present in the indoor space, the indoor ambient temperature sensor is used to detect the indoor ambient temperature of the indoor space, and a set temperature corresponding to the indoor space is obtained. Based on the indoor ambient temperature and the set temperature, the air conditioner is controlled to execute the enhanced defrosting mode.

[0079] Preferably, the air conditioner defrosting control device provided by the present invention is specifically used to calculate and process the indoor ambient temperature and the set temperature to obtain the indoor temperature difference. The indoor temperature difference is compared with a preset temperature threshold to obtain a first temperature comparison result, and the indoor ambient temperature is compared with the set temperature to obtain a second temperature comparison result. If the first temperature comparison result indicates that the indoor temperature difference is greater than or equal to the preset temperature threshold, and the second temperature comparison result indicates that the indoor ambient temperature is greater than or equal to the set temperature, the air conditioner is controlled to execute the enhanced defrosting mode. When the first temperature comparison result indicates that the indoor temperature difference is greater than or equal to the preset temperature threshold, and the second temperature comparison result indicates that the indoor ambient temperature is less than the set temperature, the fan speeds of the first fan and the second fan are increased respectively, and the first fan and the second fan are controlled to run at the new fan speed for a first duration respectively. When the first duration reaches the preset duration threshold, the air conditioner is controlled to execute the enhanced defrosting mode. If the first temperature comparison result indicates that the indoor temperature difference is less than the preset temperature threshold, the first fan and the second fan are controlled to run at the original fan speed for a second duration, and if the second duration reaches the preset duration threshold, the air conditioner is controlled to execute the enhanced defrosting mode.

[0080] Preferably, the defrosting control device for air conditioners provided by the present invention is specifically used to compare the outdoor ambient temperature and the outdoor temperature threshold to obtain a third temperature comparison result, and to compare the outdoor coil temperature and the outdoor coil temperature threshold to obtain a fourth temperature comparison result. When the third temperature comparison result indicates that the outdoor ambient temperature is less than the outdoor temperature threshold, and the fourth temperature comparison result indicates that the external coil temperature is less than the external coil temperature threshold, the initial current value, the intermediate current value, and the final current value of the first fan at the initial moment of operation at the target speed are collected. The initial current value at the initial moment, the intermediate current value at the intermediate moment, and the final current value at the final moment are calculated and processed to obtain the first average current value corresponding to the first fan.

[0081] This invention provides an air conditioner defrosting control method, apparatus, device, storage medium, and air conditioner. It utilizes an outdoor ambient temperature sensor to detect the outdoor ambient temperature during air conditioner operation and an external coil temperature sensor to detect the external coil temperature at the second fan coil unit. Based on the outdoor ambient temperature and the external coil temperature, it determines a first average current value corresponding to the first fan and a second average current value corresponding to the second fan. Based on the first and second average current values, it controls the air conditioner to execute a target defrosting mode. This addresses the shortcomings of existing dual-fan air conditioners with only one defrosting sensor, where low accuracy in determining the defrosting timing leads to low heating efficiency. By controlling the air conditioner to defrost in the target defrosting mode at the optimal defrosting time, it improves both defrosting efficiency and indoor heating efficiency.

[0082] Figure 4 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 4 As shown, the electronic device may include a processor 410, a communications interface 420, a memory 430, and a communication bus 440, wherein the processor 410, communications interface 420, and memory 430 communicate with each other via the communication bus 440. The processor 410 can call logical instructions in the memory 430 to execute an air conditioner defrosting control method. This method includes: detecting the outdoor ambient temperature during air conditioner operation using the outdoor ambient temperature sensor, and detecting the external coil temperature at the second fan coil unit using the external coil temperature sensor; determining a first average current value corresponding to the first fan and a second average current value corresponding to the second fan based on the outdoor ambient temperature and the external coil temperature; and controlling the air conditioner to execute a target defrosting mode based on the first average current value and the second average current value.

[0083] Furthermore, the logical instructions in the aforementioned memory 430 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0084] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the air conditioner defrosting control method provided by the above methods. The method includes: detecting the outdoor ambient temperature during air conditioner operation using the outdoor ambient temperature sensor, and detecting the external coil temperature at the second fan coil unit using the external coil temperature sensor; determining a first average current value corresponding to the first fan and a second average current value corresponding to the second fan based on the outdoor ambient temperature and the external coil temperature; and controlling the air conditioner to execute a target defrosting mode based on the first average current value and the second average current value.

[0085] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the air conditioner defrosting control method provided by the above methods. The method includes: detecting the outdoor ambient temperature during air conditioner operation using the outdoor ambient temperature sensor, and detecting the external coil temperature at the second fan coil unit using the external coil temperature sensor; determining a first average current value corresponding to the first fan and a second average current value corresponding to the second fan based on the outdoor ambient temperature and the external coil temperature; and controlling the air conditioner to execute a target defrosting mode based on the first average current value and the second average current value.

[0086] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0087] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A defrosting control method for an air conditioner, characterized in that, The method is applied to an air conditioner, which includes at least an outdoor unit and an indoor unit; the outdoor unit includes at least a first fan, a second fan, an outdoor coil temperature sensor, and an outdoor ambient temperature sensor, wherein the outdoor coil temperature sensor is disposed at the coil of the second fan; the defrosting control method for the air conditioner includes: The outdoor ambient temperature sensor is used to detect the outdoor ambient temperature when the air conditioner is running, and the outdoor coil temperature sensor is used to detect the outdoor coil temperature at the second fan coil unit. Based on the outdoor ambient temperature and the external coil temperature, a first average current value corresponding to the first fan and a second average current value corresponding to the second fan are determined. Based on the first average current value and the second average current value, the air conditioner is controlled to execute the target defrost mode.

2. The air conditioner defrosting control method according to claim 1, characterized in that, The target defrosting mode includes at least: normal defrosting mode; The step of controlling the air conditioner to execute the target defrost mode based on the first average current value and the second average current value includes: The first average current and the second average current are compared to obtain the current comparison result. If the current comparison result indicates that the first average current value and the second average current value are the same, the air conditioner is controlled to perform a normal defrost mode.

3. The air conditioner defrosting control method according to claim 2, characterized in that, The indoor unit includes at least: an infrared sensor; After comparing the first average current value and the second average current value to obtain the current comparison result, the method further includes: The infrared sensor is used to detect users in the indoor space; If the comparison result indicates that the first average current value and the second average current value are different, and the user is not present in the indoor space, the air conditioner is controlled to perform a normal defrost mode.

4. The air conditioner defrosting control method according to claim 3, characterized in that, The indoor unit also includes at least: an indoor ambient temperature sensor; The target defrosting mode also includes at least: an enhanced defrosting mode; Following the step of detecting users in the indoor space using the infrared sensor, the method further includes: When the current comparison result indicates that the first average current value and the second average current value are different, and the user is present in the indoor space, the indoor ambient temperature sensor is used to detect the indoor ambient temperature of the indoor space, and a set temperature corresponding to the indoor space is obtained. Based on the indoor ambient temperature and the set temperature, the air conditioner is controlled to execute the enhanced defrosting mode.

5. The air conditioner defrosting control method according to claim 4, characterized in that, The step of controlling the air conditioner to execute the enhanced defrost mode based on the indoor ambient temperature and the set temperature includes: The indoor ambient temperature and the set temperature are calculated to obtain the indoor temperature difference. The indoor temperature difference is compared with a preset temperature threshold to obtain a first temperature comparison result, and the indoor ambient temperature is compared with the set temperature to obtain a second temperature comparison result. If the first temperature comparison result indicates that the indoor temperature difference is greater than or equal to the preset temperature threshold, and the second temperature comparison result indicates that the indoor ambient temperature is greater than or equal to the set temperature, the air conditioner is controlled to execute the enhanced defrosting mode. When the first temperature comparison result indicates that the indoor temperature difference is greater than or equal to the preset temperature threshold, and the second temperature comparison result indicates that the indoor ambient temperature is less than the set temperature, the fan speeds of the first fan and the second fan are increased respectively, and the first fan and the second fan are controlled to run at the new fan speed for a first duration respectively. When the first duration reaches the preset duration threshold, the air conditioner is controlled to execute the enhanced defrosting mode. If the first temperature comparison result indicates that the indoor temperature difference is less than the preset temperature threshold, the first fan and the second fan are controlled to run at the original fan speed for a second duration, and if the second duration reaches the preset duration threshold, the air conditioner is controlled to execute the enhanced defrosting mode.

6. The defrosting control method for an air conditioner according to any one of claims 1 to 5, characterized in that, The step of determining the average first current value corresponding to the first fan based on the outdoor ambient temperature and the external coil temperature includes: The outdoor ambient temperature and the outdoor temperature threshold are compared to obtain a third temperature comparison result, and the external coil temperature and the external coil temperature threshold are compared to obtain a fourth temperature comparison result. When the third temperature comparison result indicates that the outdoor ambient temperature is less than the outdoor temperature threshold, and the fourth temperature comparison result indicates that the external coil temperature is less than the external coil temperature threshold, the initial current value, the intermediate current value, and the final current value of the first fan at the initial moment of operation at the target speed are collected. The initial current value at the initial moment, the intermediate current value at the intermediate moment, and the final current value at the final moment are calculated and processed to obtain the first average current value corresponding to the first fan.

7. A defrosting control device for an air conditioner, characterized in that, The device is applied to an air conditioner, which includes at least an outdoor unit and an indoor unit; the outdoor unit includes at least a first fan, a second fan, an outdoor coil temperature sensor, and an outdoor ambient temperature sensor, wherein the outdoor coil temperature sensor is disposed at the coil of the second fan; the defrost control device for the air conditioner includes: The detection module is used to detect the outdoor ambient temperature when the air conditioner is running using the outdoor ambient temperature sensor, and to detect the temperature of the external coil at the second fan coil unit using the external coil temperature sensor. The determination module is used to determine a first average current value corresponding to the first fan and a second average current value corresponding to the second fan based on the outdoor ambient temperature and the external coil temperature. The control module is used to control the air conditioner to execute a target defrosting mode based on the first average current value and the second average current value.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the program, it implements the air conditioner defrosting control method as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the air conditioner defrosting control method as described in any one of claims 1 to 6.

10. An air conditioner, comprising an outdoor unit and an indoor unit, characterized in that, The outdoor unit includes at least: a first fan, a second fan, an external coil temperature sensor, and an outdoor ambient temperature sensor. The external coil temperature sensor is located at the coil of the second fan. The air conditioner also includes at least the defrosting control device as described in claim 7.

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