Air conditioner defrosting control method, device and equipment based on double-fan machine, storage medium and air conditioner

Abstract

This invention provides a defrosting control method, apparatus, device, storage medium, and air conditioner based on a dual-fan air conditioner, relating to the field of air conditioner technology. The method includes acquiring the outdoor ambient temperature during air conditioner operation; determining whether the outdoor ambient temperature meets a first preset condition; detecting the external coil temperature at the second fan coil unit; determining whether the external coil temperature meets a second preset condition; and acquiring a first speed and a second speed; adjusting the first speed to a target speed and controlling the first fan to run for a first operating time; adjusting the second speed to the target speed and controlling the second fan to run for a first operating time; determining a first average current value for the first fan and a second average current value for the second fan; and controlling the air conditioner to perform defrosting based on the first and second average current values. The embodiments provided by this invention improve heating efficiency by determining the optimal defrosting timing and controlling the air conditioner to defrost at the optimal time.

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 based on a dual-fan unit. 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, determining the optimal defrosting time is a pressing technical problem for multi-fan machines, especially dual-fan machines. Summary of the Invention

[0005] This invention provides a defrosting control method, apparatus, device, storage medium, and air conditioner based on a dual-fan air conditioner. It 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 achieves this by determining the optimal defrosting timing based on the first average current of the first fan and the second average current of the second fan, thereby controlling the air conditioner to defrost at the optimal time and improving heating efficiency.

[0006] In a first aspect, the present invention provides a defrosting control method for an air conditioner based on a dual-fan unit, 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 defrosting control method for the air conditioner based on a dual-fan unit includes: The outdoor ambient temperature sensor is used to obtain the outdoor ambient temperature when the air conditioner is running, and to determine whether the outdoor ambient temperature meets the first preset condition. If the outdoor ambient temperature meets the first preset condition, the outdoor coil temperature sensor is used to detect the outdoor coil temperature at the second fan coil unit. Determine whether the temperature of the external coil meets the second preset condition, and if the temperature of the external coil meets the second preset condition, obtain the first speed of the first fan and the second speed of the second fan; The first speed of the first fan is adjusted to the target speed, and the first fan is controlled to run at the target speed for a first running time; and the second speed of the second fan is adjusted to the target speed, and the second fan is controlled to run at the target speed for a first running time. Determine a first average current value of the first fan motor operating at the target speed for the first operating time, and determine a second average current value of the second fan motor operating at the target speed for the first operating time; Based on the first average current value and the second average current value, the air conditioner is controlled to perform defrosting.

[0007] Preferably, the defrosting control method for an air conditioner based on a dual-fan unit provided by the present invention... The step of determining whether the outdoor ambient temperature meets the first preset condition includes: The outdoor ambient temperature is compared with a first preset temperature threshold, and if the outdoor ambient temperature is less than the first preset temperature threshold, a second running time is determined when the outdoor ambient temperature is less than the first preset temperature threshold. The second runtime and the first preset runtime threshold are compared and processed; When the second running time is greater than or equal to the first preset running time threshold, it is determined that the outdoor ambient temperature meets the first preset condition; If the second running time is less than the first preset running time threshold, it is determined that the outdoor ambient temperature does not meet the first preset condition.

[0008] Preferably, in the defrosting control method for an air conditioner based on a dual-fan unit provided by the present invention, the step of determining whether the temperature of the external coil meets the second preset condition includes: The external coil temperature is compared with the second preset temperature threshold, and if the external coil temperature is less than the second preset temperature threshold, a third running time when the external coil temperature is less than the second preset temperature threshold is determined. The third runtime and the second preset runtime threshold are compared and processed; When the third running time is greater than or equal to the second preset time threshold, it is determined that the temperature of the external coil meets the second preset condition; When the third running time is less than the second preset time threshold, it is determined that the temperature of the external coil does not meet the second preset condition.

[0009] Preferably, in the defrosting control method for an air conditioner based on a dual-fan unit provided by the present invention, the first running time includes at least: an initial time, an intermediate time, and an end time; Determining the first average current value of the first fan operating at the target speed for the first operating time includes: The initial current value, intermediate current value, and final current value of the first fan at the target speed are collected at the initial moment, the intermediate moment, and the final moment, respectively. 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 for the first running time.

[0010] Preferably, according to the defrosting control method for an air conditioner based on a dual-fan unit provided by the present invention, controlling the air conditioner to perform defrosting based on the first average current value and the second average current value includes: A first calculation process is performed on the first average current value and the second average current value to obtain a first deviation value; A second calculation process is performed on the first average current value and the second average current value to obtain a second deviation value; The first deviation value is compared with a preset deviation threshold, and the second deviation value is compared with the preset deviation threshold. If the first deviation value is less than or equal to the preset deviation threshold and the second deviation value is less than or equal to the preset deviation threshold, the current moment is determined to be the optimal time for defrosting the air conditioner, and the defrosting program of the air conditioner is triggered, so that the air conditioner performs defrosting.

[0011] Preferably, in the defrosting control method for an air conditioner based on a dual-fan unit provided by the present invention, the first calculation process of the first average current and the second average current to obtain a first deviation value includes: Calculate the current difference between the first average current and the second average current; The deviation between the current difference and the first average current is calculated to obtain the first deviation value.

[0012] Secondly, the present invention also provides a defrosting control device for an air conditioner based on a dual-fan unit, 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 defrosting control device for the air conditioner based on a dual-fan unit includes: The module for detecting the external coil temperature is used to obtain the outdoor ambient temperature when the air conditioner is running using the outdoor ambient temperature sensor, and to determine whether the outdoor ambient temperature meets the first preset condition. If the outdoor ambient temperature meets the first preset condition, the module uses the external coil temperature sensor to detect the external coil temperature at the second fan coil unit. The speed acquisition module is used to determine whether the temperature of the external coil meets the second preset condition, and when the temperature of the external coil meets the second preset condition, to acquire the first speed of the first fan and the second speed of the second fan. A speed control module is used to adjust the first speed of the first fan to a target speed and control the first fan to run at the target speed for a first running time; and to adjust the second speed of the second fan to the target speed and control the second fan to run at the target speed for a first running time. The current average value determination module is used to determine a first current average value of the first fan running at the target speed for the first running time, and to determine a second current average value of the second fan running at the target speed for the first running time; A defrosting control module is used to control the air conditioner to perform defrosting 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 based on a dual-fan unit 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 defrosting control method for an air conditioner based on a dual-fan unit 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 defrosting control method for an air conditioner based on a dual-fan unit as described above.

[0016] In a sixth aspect, the present invention also provides an air conditioner, 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 the controller, when executed, implements the defrosting control method for an air conditioner based on dual fans as described above.

[0017] This invention provides a defrosting control method, apparatus, device, storage medium, and air conditioner based on a dual-fan air conditioner. The method utilizes an outdoor ambient temperature sensor to acquire the outdoor ambient temperature during air conditioner operation, and determines whether the outdoor ambient temperature meets a first preset condition. If the outdoor ambient temperature meets the first preset condition, an external coil temperature sensor detects the external coil temperature at the second fan coil unit. The method then determines whether the external coil temperature meets a second preset condition, and if the external coil temperature meets the second preset condition, acquires a first rotational speed of the first fan and a second rotational speed of the second fan. The method adjusts the first rotational speed of the first fan to a target speed and controls the first fan to run at the target speed for a first operating time. It also adjusts the second rotational speed of the second fan to the target speed and controls the second fan to run at the target speed for the first operating time. The method determines a first average current value for the first fan running at the target speed for the first operating time, and a second average current value for the second fan running at the target speed for the first operating time. Based on the first average current value and the second average current value, the method controls the air conditioner to perform defrosting. This invention addresses the shortcomings of existing dual-fan air conditioners with only one defrost sensor, where the accuracy of determining the defrost timing is low, leading to low heating efficiency. It achieves this by determining the optimal defrost timing based on the first average current of the first fan and the second average current of the second fan, thereby controlling the air conditioner to defrost at the optimal time and improving 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 an air conditioner based on a dual-fan unit provided by the present invention.

[0020] Figure 2This is the second flowchart of the defrosting control method for an air conditioner based on a dual-fan unit provided by the present invention.

[0021] Figure 3 This is a schematic diagram of the defrosting control device for an air conditioner based on a dual-fan motor 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: In related technologies, the timing of defrosting in air conditioners is usually determined by using the defrost coil sensor corresponding to each fan to detect the frost thickness, thereby determining the defrosting time. However, for multi-fan air conditioners, such as dual-fan air conditioners, some manufacturers, in order to save costs, only configure one defrost coil sensor to determine the defrosting time.

[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, determining the optimal defrosting time is a pressing technical problem for multi-fan machines, especially dual-fan machines.

[0030] The following is combined Figures 1-4 This invention describes a defrosting control method, apparatus, device, storage medium, and air conditioner based on a dual-fan air conditioner. It 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 achieves this by determining the optimal defrosting timing based on the first average current of the first fan and the second average current of the second fan, thereby controlling the air conditioner to defrost at the optimal time and improving heating efficiency.

[0031] Figure 1 This is one of the flowcharts illustrating a defrosting control method for an air conditioner based on a dual-fan unit provided by the present invention, as shown below. Figure 1 As shown, the method may include, but is not limited to, steps S100 to S500: S100, the outdoor ambient temperature during the operation of the air conditioner is obtained by the outdoor ambient temperature sensor, and it is determined whether the outdoor ambient temperature meets the first preset condition. If the outdoor ambient temperature meets the first preset condition, the temperature of the external coil at the second fan coil unit is detected by the external coil temperature sensor. S200, determine whether the temperature of the outer coil meets the second preset condition, and if the temperature of the outer coil meets the second preset condition, obtain the first speed of the first fan and the second speed of the second fan; S300, adjust the first speed of the first fan to the target speed, and control the first fan to run at the target speed for a first running time; and adjust the second speed of the second fan to the target speed, and control the second fan to run at the target speed for a first running time; S400, determine a first average current value of the first fan running at the target speed for the first running time, and determine a second average current value of the second fan running at the target speed for the first running time; S500, based on the first average current value and the second average current value, controls the air conditioner to perform defrosting.

[0032] An air conditioner includes 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.

[0033] 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.

[0034] 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.

[0035] In step S100 of some embodiments, the outdoor ambient temperature during the operation of the air conditioner is obtained using the outdoor ambient temperature sensor, and it is determined whether the outdoor ambient temperature meets the first preset condition. If the outdoor ambient temperature meets the first preset condition, the temperature of the external coil at the second fan coil unit is detected using the external coil temperature sensor.

[0036] Furthermore, the outdoor ambient temperature during air conditioner operation is obtained using the outdoor ambient temperature sensor, and the outdoor ambient temperature is compared with a first preset temperature threshold.

[0037] It should be noted that the first preset temperature threshold is the temperature at which the air conditioner is prone to frost formation. In this embodiment of the invention, it can be set to 10 degrees Celsius. Let the outdoor ambient temperature be T1 and the first preset temperature threshold be T0.

[0038] Furthermore, when the outdoor ambient temperature T1 is greater than or equal to the first preset temperature threshold T0, it indicates that the outdoor ambient temperature is relatively high. Under this condition, the air conditioner is less likely to frost up.

[0039] Preferably, when the outdoor ambient temperature T1 is less than the first preset temperature threshold T0, a second running time when the outdoor ambient temperature T1 is less than the first preset temperature threshold T0 is determined.

[0040] The second running time is the time when the outdoor ambient temperature starts to fall below the first preset temperature threshold. It is the duration during which the outdoor ambient temperature is below the first preset temperature threshold. This can be used to measure changes in the outdoor ambient temperature and help improve the accuracy of determining the optimal defrosting time.

[0041] Preferably, the second runtime and the first preset runtime threshold are compared.

[0042] When the second running time is greater than or equal to the first preset time threshold, it is determined that the outdoor ambient temperature meets the first preset condition, that is, the outdoor ambient temperature is less than the first preset temperature threshold throughout the second running time. In this case, the outdoor ambient temperature is low and frost is relatively easy to form.

[0043] When the second running time is less than the first preset time threshold, it is determined that the outdoor ambient temperature does not meet the first preset condition. That is, although the outdoor ambient temperature is briefly lower than the first preset temperature threshold and there was a risk of easy frost formation, the air conditioner is less likely to frost as the outdoor ambient temperature rises.

[0044] Using outdoor ambient temperature to measure whether an air conditioner is prone to frost can save energy and avoid the drawback of frequent defrosting in existing technologies, which leads to high energy consumption.

[0045] Furthermore, when the outdoor ambient temperature meets the first preset condition, the temperature of the external coil at the second fan coil unit is detected using the external coil temperature sensor.

[0046] In step S200 of some embodiments, it is determined whether the temperature of the outer coil meets the second preset condition, and if the temperature of the outer coil meets the second preset condition, the first speed of the first fan and the second speed of the second fan are obtained.

[0047] It is understandable that the external coil temperature is compared with the second preset temperature threshold.

[0048] When the external coil temperature is less than the second preset temperature threshold, a third operating time when the external coil temperature is less than the second preset temperature threshold is determined, indicating that the external coil temperature is prone to frost formation. However, in order to further determine whether the external coil temperature is prone to frost formation in the long term, further analysis of the duration of frost formation is required.

[0049] The comparison between the third running time and the second preset time threshold is to further illustrate that if the external coil temperature is consistently lower than the second preset temperature threshold, frost is more likely to form.

[0050] When the third running time is greater than or equal to the second preset time threshold, the temperature of the external coil is determined to meet the second preset condition. For example, if the temperature of the external coil is lower than the temperature at which frost easily forms, i.e., 0 degrees Celsius, then because it has been in the temperature range at which frost easily forms for a long time, the temperature of the external coil is determined to meet the second preset condition, i.e., it meets the condition of easy frost formation.

[0051] When the third running time is less than the second preset time threshold, it is determined that the external coil temperature does not meet the second preset condition. Since the external coil temperature is lower than the temperature that is prone to frost for a very short time, it is only briefly lower than the temperature that is prone to frost, and then the temperature rises again and it is not easy to frost. Therefore, it can be determined that the external coil temperature does not meet the second preset condition, that is, it does not meet the condition that is prone to frost at this time.

[0052] In step S300 of some embodiments, the first speed of the first fan is adjusted to the target speed, and the first fan is controlled to run at the target speed for a first running time; and the second speed of the second fan is adjusted to the target speed, and the second fan is controlled to run at the target speed for a first running time.

[0053] Understandably, in order to further determine the optimal defrosting conditions, the first speed of the first fan is adjusted to the target speed. For example, if the first speed of the first fan was originally 100 revolutions per minute, it is now adjusted to the target wind speed of 200 revolutions per minute. At the same time, the first fan is controlled to run at the target wind speed of 200 revolutions per minute for a first running time, such as 5 minutes.

[0054] Similarly, the second fan speed, originally 50 rpm, is now adjusted to the target speed of 200 rpm, and simultaneously controlled to run at the target speed of 200 rpm for a first run time of 5 minutes. This is to determine the current changes of the first and second fans during the speed adjustment process.

[0055] It should be further noted that, according to experimental test results, the current of the first and second fans changes accordingly with the degree of frost on the outdoor coil. Furthermore, as the thickness of the frost on the outdoor unit increases, the current of both fans tends to increase. Therefore, utilizing the pattern of current changes in the first and second fans in response to the degree of frost on the outdoor coil to determine the degree of frost on the outdoor coil of the first and second fans can effectively overcome the limitations of existing technologies that use outdoor coil temperature to determine the degree of frost, thus accurately determining when the air conditioner should enter defrost mode.

[0056] For air conditioners with dual outdoor units, since there is no outdoor coil temperature sensor at the first fan, it is impossible to determine the frost condition of the outdoor coil based on the outdoor coil temperature. However, the current of the first and second fans can reflect the frost condition of the upper and lower parts of the outdoor coil, respectively. Therefore, by increasing the speed of the first and second fans and observing the changes in their current, the timing of the air conditioner entering defrost mode can be determined more accurately.

[0057] In step S400 of some embodiments, a first average current value is determined for the first fan running at the target speed for the first running time, and a second average current value is determined for the second fan running at the target speed for the first running time.

[0058] Furthermore, in some embodiments of the present invention, the first running time includes at least: an initial time, an intermediate time, and an end time.

[0059] The step of determining the first average current value of the first fan motor operating at the target speed for the first operating time includes: The initial current value, intermediate current value, and final current value of the first fan at the target speed are collected at the initial moment, the intermediate moment, and the final moment, respectively.

[0060] This can be achieved through the following steps: Initial preparation: Ensure that the first fan is correctly connected to the power supply and control system.

[0061] Use a current sensor or multi-function power monitor connected to the power line of the first fan to monitor current changes in real time.

[0062] Set the target speed and start the fan: The target speed of the first fan is set by the control system, and the fan is started.

[0063] Acquire initial current value: At the initial moment after the first fan starts and reaches the target speed (e.g., within the first second after startup), the current value displayed by the current sensor is recorded as the initial current value.

[0064] Collect intermediate current values: During the first period of stable fan operation, select one or more intermediate time points (e.g., at regular time intervals, such as every minute or hour) and record the current values ​​displayed by the current sensor as intermediate current values. These intermediate time points can be selected according to actual needs and testing objectives.

[0065] Acquisition endpoint current value: When the first fan completes the predetermined running time or reaches the test endpoint, record the current value at the last moment as the endpoint current value.

[0066] Data recording and analysis: All collected initial, intermediate, and final current values ​​were recorded and analyzed. By comparing the current values ​​at different times, the performance changes, energy consumption, and any abnormalities of the fan during operation can be assessed.

[0067] It should be noted that the specific data collection methods and time intervals may vary depending on the fan model, the control system's functions, and the testing objectives. Therefore, adjustments and optimizations should be made according to the specific circumstances during actual operation.

[0068] 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 for the first running time.

[0069] It is understandable that 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 summed and calculated.

[0070] For example, let 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 be b1, b2, and b3, respectively. Let the initial moment, intermediate moment, and final moment be t1, t2, and t3, respectively.

[0071] Therefore, (b1+b2+b3) / (t1+t2+t3)=C1 C1 is the average value of the first current.

[0072] Similarly, the second average current of the second fan running at the target speed for a first running time can be determined using the method described above for determining the first average current, which will not be repeated here.

[0073] That is, 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 collected when the second fan is running at the target speed.

[0074] 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 of the second fan are calculated and processed to obtain the second average current value for the first running time.

[0075] In step S500 of some embodiments, controlling the air conditioner to perform defrosting based on the first average current value and the second average current value includes: A first calculation process is performed on the first average current value and the second average current value to obtain a first deviation value; A second calculation process is performed on the first average current value and the second average current value to obtain a second deviation value; The first deviation value is compared with a preset deviation threshold, and the second deviation value is compared with the preset deviation threshold. If the first deviation value is less than or equal to the preset deviation threshold and the second deviation value is less than or equal to the preset deviation threshold, the current moment is determined to be the optimal time for defrosting the air conditioner, and the defrosting program of the air conditioner is triggered, so that the air conditioner performs defrosting.

[0076] It is understandable that, by performing a first calculation on the first average current C1 and the second average current C2, the first deviation value D1 is obtained as follows: First, the current difference between the first average current and the second average current can be calculated. Then, the deviation between the current difference and the first average current is calculated to obtain the first deviation value. Specifically, this can be done as follows: D1 = |(C1-C2) / C1| D1 is the first deviation value, C1 is the first average current of the first fan as its speed increases, and C2 is the second average current of the second fan as its speed increases to the target speed.

[0077] A second calculation is performed on the first average current value and the second average current value to obtain the second deviation value D2, which can be specifically: D2 = |(C1-C2) / C2| D2 is the second deviation value, C1 is the first average current of the first fan during the speed increase process, and C2 is the second average current of the second fan when the speed increases to the target speed.

[0078] The preset deviation threshold can be 5%.

[0079] The comparison between the first deviation value and the preset deviation threshold, and the comparison between the second deviation value and the preset deviation threshold, are performed to determine the degree of frost formation between the first fan and the second fan based on the current changes of the first fan and the second fan.

[0080] If the first deviation value is less than or equal to the preset deviation threshold, and the second deviation value is less than or equal to the preset deviation threshold (i.e., D1 ≤ 5% and D2 ≤ 5%), then C1 = C2, meaning the first and second fans have the same degree of frost. At this point, the current moment is determined to be the optimal defrosting time for the air conditioner, triggering the defrosting program and causing the air conditioner to perform defrosting.

[0081] Conversely, if D1 is greater than 5% or D2 is greater than 5%, it is considered that the degree of frost on the first and second fans is different. This is not the optimal time for defrosting. Using special fan speed control logic, normal operation is restored, and the first and second fans of the air conditioner are controlled to run for another 5 minutes before defrosting is initiated. In this way, the indoor heating efficiency can be improved through these 5 minutes of operation. Then, defrosting can be performed with minimal loss of heating efficiency.

[0082] Furthermore, when the optimal defrosting time is determined, the air conditioner is controlled to perform defrosting according to a preset defrosting program. Even further, when the air conditioning control system receives a frosting signal from the outdoor unit and executes the defrosting program, the defrosting function is automatically activated. 1. The indoor and outdoor fan motors stop blowing air, and the air conditioning system directly switches to heating mode; 2. When operating in cooling mode, the indoor fan motor stops and the outdoor fan motor starts; 3. Defrosting complete (time setting and signal release), outdoor fan motor stops; 4. The air conditioning system directly switches from cooling to heating mode, and the outdoor fan motor starts; 5. The indoor motor will resume air supply once the indoor condenser reaches its basic temperature.

[0083] In embodiments of the present invention, ultrasonic defrosting can be performed: 1. The mechanical vibration of ultrasound is used to break down the ice crystal structure and melt the ice.

[0084] 2. Ultrasonic generator frequency 20-100kHz.

[0085] 3. The effect is affected by parameters such as frequency, sound pressure level, and propagation distance.

[0086] 4. Can be used in conjunction with hot air defrosting and electric heating.

[0087] In embodiments of the present invention, magnetic field defrosting can be performed: 1. Apply a magnetic field to the surface of the evaporator to change the structure of water molecules and inhibit frost formation.

[0088] 2. Coils are often used to generate alternating electromagnetic fields with frequencies of tens of hertz.

[0089] 3. It can also implant permanent magnetic materials to form a static magnetic field.

[0090] 4. Stable operation, no damage, and good anti-frost effect.

[0091] In embodiments of the present invention, nano-coating defrosting can be performed: 1. Nano-coatings can improve the surface structure of the evaporator and reduce the probability of frosting.

[0092] 2. Common examples include nano-silicone gel coatings.

[0093] 3. Nano-coatings can increase surface roughness and improve heat conduction.

[0094] 4. Anti-icing agents can also be added to improve the defrosting performance of the coating.

[0095] like Figure 2 The diagram shown is a second schematic of the defrosting control method for an air conditioner based on a dual-fan unit provided by the present invention. First, the dual-fan outdoor unit of the air conditioner operates normally. It is determined whether the outdoor ambient temperature T1 is less than a first preset temperature threshold T0. If the outdoor ambient temperature is less than the first preset temperature threshold, it is determined whether the outdoor coil temperature T2 is less than a second preset temperature threshold T3. If the outdoor coil temperature is less than the second preset temperature threshold, a first average current C1 is determined for the first fan operating at the target speed for the first operating time, and a second average current C2 is determined for the second fan operating at the target speed for the first operating time. It is then determined whether the first average current and the second average current are the same. If they are the same, the air conditioner is controlled to execute the defrosting procedure.

[0096] When the average values ​​of the first and second currents are different, it is assumed that the degree of frost on the first and second fans is different. This is not the optimal time for defrosting. Using special fan speed control logic, normal operation is restored. The first and second fans of the air conditioner are controlled to run for another 5 minutes before defrosting is initiated. In this way, the indoor heating efficiency can be improved through these 5 minutes of operation. Then, defrosting can be performed with minimal loss of heating efficiency.

[0097] 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.

[0098] This invention provides a defrosting control method, apparatus, device, storage medium, and air conditioner based on a dual-fan air conditioner. The method utilizes an outdoor ambient temperature sensor to acquire the outdoor ambient temperature during air conditioner operation, and determines whether the outdoor ambient temperature meets a first preset condition. If the outdoor ambient temperature meets the first preset condition, an external coil temperature sensor detects the external coil temperature at the second fan coil unit. The method then determines whether the external coil temperature meets a second preset condition, and if the external coil temperature meets the second preset condition, acquires a first rotational speed of the first fan and a second rotational speed of the second fan. The method adjusts the first rotational speed of the first fan to a target speed and controls the first fan to run at the target speed for a first operating time. It also adjusts the second rotational speed of the second fan to the target speed and controls the second fan to run at the target speed for the first operating time. The method determines a first average current value for the first fan running at the target speed for the first operating time, and a second average current value for the second fan running at the target speed for the first operating time. Based on the first average current value and the second average current value, the method controls the air conditioner to perform defrosting. This invention addresses the shortcomings of existing dual-fan air conditioners with only one defrost sensor, where the accuracy of determining the defrost timing is low, leading to low heating efficiency. It achieves this by determining the optimal defrost timing based on the first average current of the first fan and the second average current of the second fan, thereby controlling the air conditioner to defrost at the optimal time and improving heating efficiency.

[0099] The defrosting control device for an air conditioner based on a dual-fan unit provided by the present invention will be described below. The defrosting control device for an air conditioner based on a dual-fan unit described below can be referred to in correspondence with the defrosting control method for an air conditioner based on a dual-fan unit described above.

[0100] Figure 3This is a schematic diagram of the structure of an air conditioner defrosting control device based on a dual-fan unit provided by the present invention. 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. The outdoor coil temperature sensor is located at the coil of the second fan. The defrosting control device includes: The external coil temperature detection module 310 is used to obtain the outdoor ambient temperature when the air conditioner is running using the outdoor ambient temperature sensor, and to determine whether the outdoor ambient temperature meets the first preset condition. If the outdoor ambient temperature meets the first preset condition, the external coil temperature at the second fan coil unit is detected using the external coil temperature sensor. The speed acquisition module 320 is used to determine whether the temperature of the outer coil meets the second preset condition, and when the temperature of the outer coil meets the second preset condition, to acquire the first speed of the first fan and the second speed of the second fan. The speed control module 330 is used to adjust the first speed of the first fan to a target speed and control the first fan to run at the target speed for a first running time; and to adjust the second speed of the second fan to the target speed and control the second fan to run at the target speed for a first running time. The average current determination module 340 is used to determine a first average current value of the first fan running at the target speed for the first running time, and to determine a second average current value of the second fan running at the target speed for the first running time. The defrosting module 350 is used to control the air conditioner to perform defrosting based on the first average current value and the second average current value.

[0101] Preferably, the air conditioner defrosting control device based on a dual-fan unit provided by the present invention is further configured to compare the outdoor ambient temperature with a first preset temperature threshold, and, when the outdoor ambient temperature is less than the first preset temperature threshold, determine a second operating time when the outdoor ambient temperature is less than the first preset temperature threshold. The second runtime and the first preset runtime threshold are compared and processed; When the second running time is greater than or equal to the first preset running time threshold, it is determined that the outdoor ambient temperature meets the first preset condition; If the second running time is less than the first preset running time threshold, it is determined that the outdoor ambient temperature does not meet the first preset condition.

[0102] Preferably, the defrosting control device for an air conditioner based on a dual-fan unit provided by the present invention is further configured to compare the temperature of the external coil with a second preset temperature threshold, and, when the temperature of the external coil is less than the second preset temperature threshold, determine a third operating time when the temperature of the external coil is less than the second preset temperature threshold. The third runtime and the second preset runtime threshold are compared and processed; When the third running time is greater than or equal to the second preset time threshold, it is determined that the temperature of the external coil meets the second preset condition; When the third running time is less than the second preset time threshold, it is determined that the temperature of the external coil does not meet the second preset condition.

[0103] Preferably, the defrosting control device for an air conditioner based on a dual-fan unit provided by the present invention is further configured such that the first running time includes at least: an initial time, an intermediate time, and an end time; The initial current value, intermediate current value, and final current value of the first fan at the target speed are collected at the initial moment, the intermediate moment, and the final moment, respectively. 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 for the first running time.

[0104] Preferably, the defrosting control device for an air conditioner based on a dual-fan motor provided by the present invention is further used to perform a first calculation process on the first average current value and the second average current value to obtain a first deviation value; A second calculation process is performed on the first average current value and the second average current value to obtain a second deviation value; The first deviation value is compared with a preset deviation threshold, and the second deviation value is compared with the preset deviation threshold. If the first deviation value is less than or equal to the preset deviation threshold and the second deviation value is less than or equal to the preset deviation threshold, the current moment is determined to be the optimal time for defrosting the air conditioner, and the defrosting program of the air conditioner is triggered, so that the air conditioner performs defrosting.

[0105] Preferably, the defrosting control device for an air conditioner based on a dual-fan motor provided by the present invention is further used to calculate the current difference between the first average current and the second average current. The deviation between the current difference and the first average current is calculated to obtain the first deviation value.

[0106] This invention provides a defrosting control method, apparatus, device, storage medium, and air conditioner based on a dual-fan air conditioner. The method utilizes an outdoor ambient temperature sensor to acquire the outdoor ambient temperature during air conditioner operation, and determines whether the outdoor ambient temperature meets a first preset condition. If the outdoor ambient temperature meets the first preset condition, an external coil temperature sensor detects the external coil temperature at the second fan coil unit. The method then determines whether the external coil temperature meets a second preset condition, and if the external coil temperature meets the second preset condition, acquires a first rotational speed of the first fan and a second rotational speed of the second fan. The method adjusts the first rotational speed of the first fan to a target speed and controls the first fan to run at the target speed for a first operating time. It also adjusts the second rotational speed of the second fan to the target speed and controls the second fan to run at the target speed for the first operating time. The method determines a first average current value for the first fan running at the target speed for the first operating time, and a second average current value for the second fan running at the target speed for the first operating time. Based on the first average current value and the second average current value, the method controls the air conditioner to perform defrosting. This invention addresses the shortcomings of existing dual-fan air conditioners with only one defrost sensor, where the accuracy of determining the defrost timing is low, leading to low heating efficiency. It achieves this by determining the optimal defrost timing based on the first average current of the first fan and the second average current of the second fan, thereby controlling the air conditioner to defrost at the optimal time and improving heating efficiency.

[0107] Figure 4 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 4As shown, the electronic device may include: a processor 410, a communications interface 420, a memory 430, and a communications bus 440, wherein the processor 410, the communications interface 420, and the memory 430 communicate with each other through the communications bus 440. The processor 410 can call logic instructions in the memory 430 to execute a defrosting control method for an air conditioner based on a dual-fan unit. This method includes: acquiring the outdoor ambient temperature during air conditioner operation using the outdoor ambient temperature sensor; determining whether the outdoor ambient temperature meets a first preset condition; and if the outdoor ambient temperature meets the first preset condition, detecting the external coil temperature at the second fan coil unit using the external coil temperature sensor; determining whether the external coil temperature meets a second preset condition; and if the external coil temperature meets the second preset condition, acquiring a first rotational speed of the first fan and a second rotational speed of the second fan; adjusting the first rotational speed of the first fan to a target rotational speed and controlling the first fan to run at the target rotational speed for a first operating duration; adjusting the second rotational speed of the second fan to the target rotational speed and controlling the second fan to run at the target rotational speed for a first operating duration; determining a first average current value of the first fan running at the target rotational speed for the first operating duration and determining a second average current value of the second fan running at the target rotational speed for the first operating duration; and controlling the air conditioner to perform defrosting based on the first average current value and the second average current value.

[0108] 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, 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.

[0109] 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 defrosting control method for an air conditioner based on a dual-fan unit provided by the above methods. This method includes: acquiring the outdoor ambient temperature during air conditioner operation using the outdoor ambient temperature sensor; determining whether the outdoor ambient temperature meets a first preset condition; and, if the outdoor ambient temperature meets the first preset condition, detecting the external coil temperature at the second fan coil unit using the external coil temperature sensor; determining whether the external coil temperature meets a second preset condition; and, if the external coil temperature meets the first preset condition, detecting the external coil temperature at the second fan coil unit using the external coil temperature sensor. When the temperature meets the second preset condition, the first speed of the first fan and the second speed of the second fan are obtained; the first speed of the first fan is adjusted to the target speed, and the first fan is controlled to run at the target speed for a first running time; the second speed of the second fan is adjusted to the target speed, and the second fan is controlled to run at the target speed for a first running time; a first average current of the first fan running at the target speed for the first running time is determined, and a second average current of the second fan running at the target speed for the first running time is determined; based on the first average current and the second average current, the air conditioner is controlled to perform defrosting.

[0110] 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 defrosting control method for an air conditioner based on a dual-fan unit provided by the methods described above. This method includes: acquiring the outdoor ambient temperature during air conditioner operation using the outdoor ambient temperature sensor; determining whether the outdoor ambient temperature meets a first preset condition; and, if the outdoor ambient temperature meets the first preset condition, detecting the external coil temperature at the second fan coil unit using the external coil temperature sensor; determining whether the external coil temperature meets a second preset condition; and, if the external coil temperature meets the second preset condition... The system acquires a first rotational speed of the first fan and a second rotational speed of the second fan; adjusts the first rotational speed of the first fan to a target rotational speed and controls the first fan to run at the target rotational speed for a first running time; adjusts the second rotational speed of the second fan to the target rotational speed and controls the second fan to run at the target rotational speed for a first running time; determines a first average current value of the first fan running at the target rotational speed for the first running time and determines a second average current value of the second fan running at the target rotational speed for the first running time; and controls the air conditioner to perform defrosting based on the first average current value and the second average current value.

[0111] 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.

[0112] 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.

[0113] 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 based on a dual-fan unit, 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 based on dual fans includes: The outdoor ambient temperature sensor is used to obtain the outdoor ambient temperature when the air conditioner is running, and to determine whether the outdoor ambient temperature meets the first preset condition. If the outdoor ambient temperature meets the first preset condition, the outdoor coil temperature sensor is used to detect the outdoor coil temperature at the second fan coil unit. Determine whether the temperature of the external coil meets the second preset condition, and if the temperature of the external coil meets the second preset condition, obtain the first speed of the first fan and the second speed of the second fan; The first speed of the first fan is adjusted to the target speed, and the first fan is controlled to run at the target speed for a first running time; and the second speed of the second fan is adjusted to the target speed, and the second fan is controlled to run at the target speed for a first running time. Determine a first average current value of the first fan motor operating at the target speed for the first operating time, and determine a second average current value of the second fan motor operating at the target speed for the first operating time; Based on the first average current value and the second average current value, the air conditioner is controlled to perform defrosting.

2. The defrosting control method for an air conditioner based on a dual-fan unit according to claim 1, characterized in that, The step of determining whether the outdoor ambient temperature meets the first preset condition includes: The outdoor ambient temperature is compared with a first preset temperature threshold, and if the outdoor ambient temperature is less than the first preset temperature threshold, a second running time is determined when the outdoor ambient temperature is less than the first preset temperature threshold. The second runtime and the first preset runtime threshold are compared and processed; When the second running time is greater than or equal to the first preset running time threshold, it is determined that the outdoor ambient temperature meets the first preset condition; If the second running time is less than the first preset running time threshold, it is determined that the outdoor ambient temperature does not meet the first preset condition.

3. The defrosting control method for an air conditioner based on a dual-fan unit according to claim 1, characterized in that, The step of determining whether the temperature of the external coil meets the second preset condition includes: The external coil temperature is compared with the second preset temperature threshold, and if the external coil temperature is less than the second preset temperature threshold, a third running time when the external coil temperature is less than the second preset temperature threshold is determined. The third runtime and the second preset runtime threshold are compared and processed; When the third running time is greater than or equal to the second preset time threshold, it is determined that the temperature of the external coil meets the second preset condition; When the third running time is less than the second preset time threshold, it is determined that the temperature of the external coil does not meet the second preset condition.

4. The defrosting control method for an air conditioner based on a dual-fan unit according to any one of claims 1 to 3, characterized in that, The first runtime includes at least: the initial time, the intermediate time, and the final time; Determining the first average current value of the first fan operating at the target speed for the first operating time includes: The initial current value, intermediate current value, and final current value of the first fan at the target speed are collected at the initial moment, the intermediate moment, and the final moment, respectively. 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 for the first running time.

5. The defrosting control method for an air conditioner based on a dual-fan unit according to any one of claims 1 to 3, characterized in that, The step of controlling the air conditioner to perform defrosting based on the first average current value and the second average current value includes: A first calculation process is performed on the first average current value and the second average current value to obtain a first deviation value; A second calculation process is performed on the first average current value and the second average current value to obtain a second deviation value; The first deviation value is compared with a preset deviation threshold, and the second deviation value is compared with the preset deviation threshold. If the first deviation value is less than or equal to the preset deviation threshold and the second deviation value is less than or equal to the preset deviation threshold, the current moment is determined to be the optimal time for defrosting the air conditioner, and the defrosting program of the air conditioner is triggered, so that the air conditioner performs defrosting.

6. The defrosting control method for an air conditioner based on a dual-fan unit according to claim 5, characterized in that, The first calculation process, which involves performing a first calculation on the first average current value and the second average current value to obtain a first deviation value, includes: Calculate the current difference between the first average current and the second average current; The deviation between the current difference and the first average current is calculated to obtain the first deviation value.

7. A defrosting control device for an air conditioner based on a dual-fan unit, 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 defrosting control device for the air conditioner based on dual fans includes: The module for detecting the external coil temperature is used to obtain the outdoor ambient temperature when the air conditioner is running using the outdoor ambient temperature sensor, and to determine whether the outdoor ambient temperature meets the first preset condition. If the outdoor ambient temperature meets the first preset condition, the module uses the external coil temperature sensor to detect the external coil temperature at the second fan coil unit. The speed acquisition module is used to determine whether the temperature of the external coil meets the second preset condition, and when the temperature of the external coil meets the second preset condition, to acquire the first speed of the first fan and the second speed of the second fan. A speed control module is used to adjust the first speed of the first fan to a target speed and control the first fan to run at the target speed for a first running time; and to adjust the second speed of the second fan to the target speed and control the second fan to run at the target speed for a first running time. The current average value determination module is used to determine a first current average value of the first fan running at the target speed for the first running time, and to determine a second current average value of the second fan running at the target speed for the first running time; A defrosting control module is used to control the air conditioner to perform defrosting 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 based on a dual-fan unit 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 defrosting control method for an air conditioner based on a dual-fan unit as described in any one of claims 1 to 6.

10. An air conditioner, comprising a controller, an outdoor unit, and an indoor unit; said outdoor unit comprising at least: The system comprises a first fan, a second fan, an external coil temperature sensor, and an outdoor ambient temperature sensor, wherein the external coil temperature sensor is located at the coil of the second fan. The controller, when executed, implements the defrosting control method for an air conditioner based on a dual-fan unit as described in any one of claims 1 to 6.

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