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

Abstract

The invention discloses an air conditioner and a defrosting control method and device thereof and a storage medium, and the method comprises the following steps: under the condition that the air conditioner operates for a first set duration in a heating manner, obtaining the temperature of an outdoor heat exchanger, the temperature of an outdoor environment and the humidity of the outdoor environment; and under the condition that it is determined that the air conditioner does not meet the condition of entering the reversing defrosting mode according to the outdoor heat exchanger temperature, the outdoor environment temperature and the outdoor environment humidity, a non-reversing defrosting mode is determined according to the outdoor environment temperature and the outdoor environment humidity, and defrosting control is conducted on the air conditioner according to the non-reversing defrosting mode. According to the defrosting control method, when the air conditioner operates in a heating mode, the non-reversing defrosting mode is determined according to different temperature and humidity ranges, and the corresponding defrosting control mode is carried out on the air conditioner according to the non-reversing defrosting mode, so that the defrosting frequency of the air conditioner is reduced, the indoor temperature fluctuation is reduced, the abnormal defrosting noise is reduced, and the defrosting efficiency of the air conditioner is improved. And the continuous heating duration is prolonged, and the heating experience of a user is improved.

Description

Technical Field

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

[0002] When an air conditioner operates in heating mode at low temperature in winter, frosting may occur on the air conditioner, so defrosting operation needs to be performed on the air conditioner. In the existing defrosting control methods, the frosting condition of the outdoor unit is judged according to the temperature of the outdoor condenser. When the temperature of the outdoor condenser is greater than the set value, the defrosting mode is entered. When the temperature of the outdoor condenser is less than a certain value, the defrosting mode is exited. Moreover, when performing the defrosting operation, the reverse-cycle defrosting method is used to defrost the air conditioner, and the air conditioner needs to be switched to the cooling operation mode, which will cause problems such as large fluctuations in indoor temperature, abnormal noise during the switching of the four-way valve, and abnormal noise due to thermal expansion and contraction, affecting the user experience. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, the first object of the present invention is to propose a defrosting control method for an air conditioner. When the air conditioner operates in heating mode, the non-reversing defrosting mode is determined according to different temperature and humidity ranges, and corresponding defrosting control methods are made for the air conditioner according to the non-reversing defrosting mode, so as to reduce the defrosting frequency of the air conditioner, reduce the indoor temperature fluctuation, reduce the defrosting abnormal noise, extend the continuous heating duration, and improve the user heating experience.

[0004] The second object of the present invention is to propose a defrosting control device for an air conditioner.

[0005] The third object of the present invention is to propose a computer-readable storage medium.

[0006] The fourth object of the present invention is to propose an air conditioner.

[0007] To achieve the above object, an embodiment of the first aspect of the present invention proposes a defrosting control method for an air conditioner, including: when the air conditioner operates in heating mode for a first set duration, obtaining the temperature of the outdoor heat exchanger, the outdoor ambient temperature, and the outdoor ambient humidity; when it is determined that the air conditioner does not meet the condition for entering the reversing defrosting mode according to the temperature of the outdoor heat exchanger, the outdoor ambient temperature, and the outdoor ambient humidity, determining the non-reversing defrosting mode according to the outdoor ambient temperature and the outdoor ambient humidity; performing defrosting control on the air conditioner according to the non-reversing defrosting mode.

[0008] The defrosting control method of an air conditioner according to an embodiment of the present invention, when the air conditioner operates in heating mode for a first set duration, obtains the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity. When it is determined that the air conditioner does not meet the conditions for entering the reversing defrosting mode based on the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity, determines the non-reversing defrosting mode according to the outdoor ambient temperature and the outdoor ambient humidity, and performs defrosting control on the air conditioner according to the non-reversing defrosting mode. Thus, when the air conditioner operates in heating mode, this method determines the non-reversing defrosting mode it is in according to different temperature and humidity ranges, and makes corresponding defrosting control methods for the air conditioner according to the non-reversing defrosting mode it is in, thereby reducing the defrosting frequency of the air conditioner, reducing the indoor temperature fluctuation, reducing the defrosting abnormal noise, prolonging the continuous heating duration, and improving the user's heating experience.

[0009] In addition, the defrosting control method of the air conditioner according to the above embodiment of the present invention may further have the following additional technical features:

[0010] According to some embodiments of the present invention, the conditions for entering the reversing defrosting mode include any one of the following: the outdoor heat exchanger temperature is less than the first heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the second heat exchanger temperature threshold and lasts for a first preset time; the indoor ambient temperature is less than the first indoor temperature threshold and the sum of the indoor ambient temperature and the outdoor ambient temperature is less than the first preset value; the outdoor ambient humidity is greater than or equal to the preset humidity threshold, wherein, according to the temperature range where the outdoor ambient temperature is located, the outdoor ambient humidity threshold is determined; wherein, the second heat exchanger temperature threshold is greater than the first heat exchanger temperature threshold.

[0011] According to some embodiments of the present invention, the conditions for entering the reversing defrosting mode include any one of the following: the corrected outdoor heat exchanger temperature is less than the first compensation temperature threshold; during the first duration, operate in the first non-reversing defrosting mode or the second non-reversing defrosting mode and have not entered the reversing defrosting mode; during the second duration, operate in the third non-reversing defrosting mode and have not entered the reversing defrosting mode; wherein, the corrected outdoor heat exchanger temperature is determined according to the initial outdoor heat exchanger temperature, the initial outdoor ambient temperature, the current outdoor heat exchanger temperature, and the current outdoor ambient temperature within a preset time interval, and the first duration is less than the second duration.

[0012] According to some embodiments of the present invention, determining the non-reversing defrosting mode according to the outdoor ambient temperature and the outdoor ambient humidity includes: determining the humidity range threshold corresponding to the outdoor ambient humidity according to the temperature range where the outdoor ambient temperature is located; when the outdoor ambient humidity is within the corresponding humidity range threshold, determining the non-reversing defrosting mode as the first non-reversing defrosting mode or the second non-reversing defrosting mode; when the outdoor ambient humidity is not within the corresponding humidity range threshold, determining the non-reversing defrosting mode as the third non-reversing defrosting mode.

[0013] According to some embodiments of the present invention, the defrosting control method of the above air conditioner further includes: when the outdoor ambient humidity is on the rise, judging the defrosting mode according to the corresponding humidity range threshold plus a preset compensation value; when the outdoor ambient humidity is on the decline, judging the defrosting mode according to the corresponding humidity range threshold minus the preset compensation value.

[0014] According to some embodiments of the present invention, the defrosting control method of the above air conditioner further includes: when judging the defrosting mode according to the compensated corresponding humidity range threshold, if it is determined to switch from the reverse defrosting mode to the non-reverse defrosting mode according to the outdoor ambient humidity, the defrosting mode remains unchanged as the reverse defrosting mode; if it is determined to switch from the non-reverse defrosting mode to the reverse defrosting mode according to the outdoor ambient humidity, and the air conditioner is in the heating operation stage, control the air conditioner to operate in the reverse defrosting mode; if it is determined to switch from the non-reverse defrosting mode to the reverse defrosting mode according to the outdoor ambient humidity, and the air conditioner is performing the non-reverse defrosting mode, re-judge the defrosting mode after the defrosting is completed.

[0015] According to some embodiments of the present invention, determining the non-reverse defrosting mode as the second non-reverse defrosting mode includes: the corrected outdoor heat exchanger temperature is less than the second compensation temperature threshold; the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a second preset time; the sum of the indoor ambient temperature and the outdoor ambient temperature is less than the second preset value; the heating operation time of the air conditioner reaches the second set duration; the previous operation is in the first non-reverse defrosting mode, or the first non-reverse defrosting mode is continuously operated for the first preset number of times; wherein, the second compensation temperature threshold is greater than the first compensation temperature threshold, the fourth heat exchanger temperature threshold is greater than the third heat exchanger temperature threshold, and the second set duration is greater than the first set duration.

[0016] According to some embodiments of the present invention, determining the non-reverse defrosting mode as the first non-reverse defrosting mode includes: the corrected outdoor heat exchanger temperature is less than the third compensation temperature threshold; the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a third preset time; the heating operation time of the air conditioner reaches the third set duration; wherein, the third compensation temperature threshold is greater than the second compensation temperature threshold, the third preset time is greater than the second preset time, and the third set duration is greater than the first set duration.

[0017] According to some embodiments of the present invention, determining the non-reversing defrost mode as the third non-reversing defrost mode includes: the corrected outdoor heat exchanger temperature is less than the fourth compensation temperature threshold; the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a fourth preset time; the heating operation time of the air conditioner reaches a fourth set duration; wherein, the fourth compensation temperature threshold is greater than the third compensation temperature threshold, the fourth preset time is greater than the third preset time, and the fourth set duration is greater than the first set duration.

[0018] According to some embodiments of the present invention, performing defrost control on the air conditioner according to the second non-reversing defrost mode includes: controlling the four-way valve not to reverse, the compressor to operate at a first operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a first preset opening degree, and the rotational speed of the indoor fan to decrease at a preset rate.

[0019] According to some embodiments of the present invention, performing defrost control on the air conditioner according to the first non-reversing defrost mode includes: controlling the four-way valve not to reverse, the compressor to operate at a second operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a second preset opening degree, and the rotational speed of the indoor fan to remain unchanged; wherein, the second operating frequency is less than the first operating frequency.

[0020] According to some embodiments of the present invention, performing defrost control on the air conditioner according to the third non-reversing defrost mode includes: controlling the four-way valve not to reverse, the compressor to operate at a third operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a third preset opening degree, and the rotational speed of the indoor fan to remain unchanged; wherein, the third operating frequency is less than the first operating frequency.

[0021] To achieve the above object, an embodiment of the second aspect of the present invention provides a defrost control device for an air conditioner, including: an acquisition module, configured to acquire the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity when the air conditioner operates in heating mode for a first set duration; a determination module, configured to determine the non-reversing defrost mode according to the outdoor ambient temperature and the outdoor ambient humidity when it is determined that the air conditioner does not meet the condition for entering the reversing defrost mode based on the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity; a control module, configured to perform defrost control on the air conditioner according to the non-reversing defrost mode.

[0022] The defrosting control device of an air conditioner according to an embodiment of the present invention, when the air conditioner operates in the heating mode for a first set duration, the acquisition module acquires the temperature of the outdoor heat exchanger, the outdoor ambient temperature, and the outdoor ambient humidity. When the determination module determines that the air conditioner does not meet the condition for entering the reverse defrosting mode based on the temperature of the outdoor heat exchanger, the outdoor ambient temperature, and the outdoor ambient humidity, it determines the non-reverse defrosting mode according to the outdoor ambient temperature and the outdoor ambient humidity, and the control module performs defrosting control on the air conditioner according to the non-reverse defrosting mode. Thus, when the air conditioner operates in the heating mode, the device determines the non-reverse defrosting mode in which it is located according to different temperature and humidity ranges, and makes corresponding defrosting control methods for the air conditioner according to the non-reverse defrosting mode in which it is located, thereby reducing the defrosting frequency of the air conditioner, reducing the indoor temperature fluctuation, reducing the defrosting abnormal noise, prolonging the continuous heating duration, and improving the user's heating experience.

[0023] To achieve the above object, an embodiment of the third aspect of the present invention proposes a computer-readable storage medium, on which a defrosting control program for an air conditioner is stored. When the defrosting control program for the air conditioner is executed by a processor, the above-mentioned defrosting control method for the air conditioner is implemented.

[0024] The computer-readable storage medium according to the embodiment of the present invention can reduce the defrosting frequency of the air conditioner, reduce the indoor temperature fluctuation, reduce the defrosting abnormal noise, prolong the continuous heating duration, and improve the user's heating experience by executing the above-mentioned defrosting control method for the air conditioner.

[0025] To achieve the above object, an embodiment of the fourth aspect of the present invention proposes an air conditioner, including a memory, a processor, and a defrosting control program for the air conditioner stored on the memory and executable on the processor. When the processor executes the defrosting control program for the air conditioner, the above-mentioned defrosting control method for the air conditioner is implemented.

[0026] The air conditioner according to the embodiment of the present invention can reduce the defrosting frequency of the air conditioner, reduce the indoor temperature fluctuation, reduce the defrosting abnormal noise, prolong the continuous heating duration, and improve the user's heating experience by executing the above-mentioned defrosting control method for the air conditioner.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0028] Figure 1 It is a flowchart of the defrosting control method for an air conditioner according to some embodiments of the present invention;

[0029] Figure 2 It is a schematic diagram of the division of defrosting modes corresponding to the outdoor ambient humidity according to some embodiments of the present invention;

[0030] Figure 3Schematic diagram of outdoor environmental humidity fluctuation compensation according to some embodiments of the present invention;

[0031] Figure 4 Flowchart of the defrosting control method of an air conditioner according to some embodiments of the present invention;

[0032] Figure 5 Block diagram of the defrosting control device of an air conditioner according to some embodiments of the present invention;

[0033] Figure 6 Block diagram of an air conditioner according to some embodiments of the present invention. Detailed Description of the Invention

[0034] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0035] The defrosting control method of an air conditioner, the defrosting control device of an air conditioner, a computer-readable storage medium, and an air conditioner proposed by embodiments of the present invention will be described below with reference to the accompanying drawings.

[0036] Figure 1 Flowchart of the defrosting control method of an air conditioner according to some embodiments of the present invention.

[0037] As Figure 1 shown, the defrosting control method of the air conditioner according to the embodiments of the present invention may include the following steps:

[0038] S1. When the air conditioner operates in the heating mode for a first set duration, obtain the temperature of the outdoor heat exchanger, the outdoor environmental temperature, and the outdoor environmental humidity. Herein, the first set duration can be calibrated according to actual situations. For example, the first set duration can be the time when the air conditioner operates stably in the heating mode, or the time when the user-set temperature is reached.

[0039] Specifically, during the operation of the air conditioner in the heating mode and when the operation time reaches the first set duration, obtain the temperature of the outdoor heat exchanger through the temperature sensor provided on the outdoor heat exchanger. There are various ways to obtain the outdoor environmental temperature and the outdoor environmental humidity. For example, detect the outdoor environmental temperature through the temperature sensor provided on the air conditioner, and collect the outdoor environmental humidity through the humidity sensor provided on the air conditioner; or obtain the outdoor environmental temperature and the outdoor environmental humidity through the temperature and humidity sensor provided on the air conditioner; or the air conditioner communicates with the device that can obtain the outdoor environmental temperature and humidity to obtain the outdoor environmental temperature and the outdoor environmental humidity.

[0040] S2. When it is determined that the air conditioner does not meet the conditions for entering the reverse defrost mode based on the outdoor heat exchanger temperature, outdoor ambient temperature, and outdoor ambient humidity, determine the non-reverse defrost mode based on the outdoor ambient temperature and outdoor ambient humidity.

[0041] Specifically, generally speaking, reverse defrost means that the air conditioner is prone to frosting and the frost is relatively thick. For example, the outdoor heat exchanger temperature is very low, or the outdoor ambient temperature is very low, or the outdoor ambient humidity is greater than the humidity threshold corresponding to the temperature range where the outdoor ambient temperature is located, or it is considered that the air conditioner needs to enter the reverse mode. When the outdoor heat exchanger temperature, outdoor ambient temperature, and outdoor ambient humidity do not meet the reverse defrost conditions, determine that the air conditioner enters the reverse defrost mode, and then determine the non-reverse defrost mode based on the outdoor ambient temperature and outdoor ambient humidity. For example, determine the temperature range according to the outdoor ambient temperature, and obtain the corresponding humidity range according to the temperature range where the outdoor ambient temperature is located. If the outdoor ambient humidity is within this humidity range, the air conditioner can enter the fast non-reverse defrost mode and the long-time non-reverse defrost mode; if the outdoor ambient humidity is not within this humidity range, it means the frost is thin, and the air conditioner can enter the fast non-reverse defrost mode.

[0042] S3. Perform defrost control on the air conditioner according to the non-reverse defrost mode.

[0043] Specifically, after determining the non-reverse defrost mode that the air conditioner needs to execute, perform defrost control on the air conditioner according to the non-reverse defrost mode in which the air conditioner is located. For different non-reverse defrost modes, the operating frequency of the compressor in the air conditioner is different, the control strategy of the indoor fan is different, and the control strategy of the opening of the electronic expansion valve is also different. By adopting different reverse defrost modes, it is possible to defrost more quickly while ensuring the performance and user comfort of the air conditioner, reduce the defrost frequency of the air conditioner, reduce the indoor temperature fluctuation, reduce the defrost abnormal noise, extend the continuous heating duration, and broaden the applicable range of the non-reverse defrost mode control method, thus enhancing the user's heating experience.

[0044] The defrost control method of the air conditioner according to the embodiments of the present invention will be described in detail below.

[0045] In some embodiments of the present invention, the conditions for entering the reverse defrost mode may include any one of the following: the outdoor heat exchanger temperature is less than the first heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the second heat exchanger temperature threshold and lasts for the first preset time; the indoor ambient temperature is less than the first indoor temperature threshold and the sum of the indoor ambient temperature and the outdoor ambient temperature is less than the first preset value; the outdoor ambient humidity is greater than or equal to the preset humidity threshold, where the outdoor ambient humidity threshold is determined according to the temperature range where the outdoor ambient temperature is located; wherein, the second heat exchanger temperature threshold is greater than the first heat exchanger temperature threshold, and the first preset time, the first indoor temperature threshold, the first preset value, and the preset humidity threshold can be calibrated according to the actual situation.

[0046] Specifically, different outdoor environmental temperature ranges correspond to different outdoor environmental humidity thresholds. After obtaining the outdoor environmental temperature, the temperature range in which the current outdoor environmental temperature is located is determined according to the outdoor environmental temperature, and thus the corresponding outdoor environmental humidity threshold can be known. For example, when T4set1 ≤ T4 < T4set2, the corresponding outdoor environmental humidity threshold is RHset2; when T4set2 ≤ T4 < T4set3, the corresponding outdoor environmental humidity threshold is aT4 + b; when T4set3 ≤ T4 < T4set4, the corresponding outdoor environmental humidity threshold is RHset3; when T4set4 ≤ T4 < T4set5, the corresponding outdoor environmental humidity threshold is cT4 + d; when T4 ≥ T4set5, the corresponding outdoor environmental humidity threshold is RHset1, where a, b, c, and d are constants, the magnitude relationship of the outdoor environmental temperature is T4set1 < T4set2 < T4set3 < T4set4 < T4set5, and the magnitude relationship of the outdoor environmental humidity threshold is RHset3 < RHset2 < RHset1. Since the frosting tendency of the air conditioner is different at different outdoor environmental temperatures, different outdoor environmental temperature ranges are divided, different outdoor environmental humidity thresholds are set, the judgment of the outdoor environmental humidity is increased, and a differential defrost control strategy is implemented, which can reduce the defrosting frequency of the air conditioner, reduce the indoor temperature fluctuation, and when the air conditioner meets the non-reversing defrost mode, operate in the non-reversing defrost mode, without switching the four-way valve to reverse, reduce the defrosting abnormal noise, extend the heating duration, and improve the user's heating experience.

[0047] When any of the following conditions is met, it indicates that the air conditioner enters the reversing defrost mode: the outdoor heat exchanger temperature is less than the first heat exchanger temperature threshold (such as T3set1), or the outdoor heat exchanger temperature is less than the second heat exchanger temperature threshold (such as T3set2) and lasts for the first preset time (such as t2), or the indoor environmental temperature is less than the first indoor temperature threshold (such as T1set1) and the sum of the indoor environmental temperature and the outdoor environmental temperature is less than the first preset value (such as Ts). That is to say, when any of the above conditions is met, it indicates that the air conditioner is in a working condition where frosting is very likely. To ensure the normal operation of the air conditioner, prevent thick frost from accumulating on the surface of the outdoor heat exchanger, affect the service life of the air conditioner, and reduce the user's heating experience, at this time, the air conditioner is directly controlled to enter the reversing defrost mode, that is, the compressor is controlled to stop running, the four-way valve is controlled to reverse, and then the compressor is started to run, and the defrost strategy is executed.

[0048] In some embodiments of the present invention, the conditions for entering the reverse defrost mode may further include any one of the following: the corrected outdoor heat exchanger temperature is less than the first compensation temperature threshold; within the first duration, operating in the first non-reverse defrost mode or the second non-reverse defrost mode and not entering the reverse defrost mode; within the second duration, operating in the third non-reverse defrost mode and not entering the reverse defrost mode; wherein, the corrected outdoor heat exchanger temperature is determined according to the initial outdoor heat exchanger temperature, the initial outdoor ambient temperature, the current outdoor heat exchanger temperature, and the current outdoor ambient temperature within a preset time interval, the first duration is less than the second duration, and the first duration and the second duration can be calibrated according to the actual situation.

[0049] Specifically, since the change in the outdoor ambient temperature will affect the outdoor heat exchanger temperature, the outdoor heat exchanger temperature can be corrected to improve the accuracy of defrost mode selection. When the air conditioner starts heating and reaches a certain specific time zone, the initial outdoor heat exchanger temperature (such as T30), the initial outdoor ambient temperature (such as T40), the current outdoor heat exchanger temperature (such as T3), and the current outdoor ambient temperature (such as T4) are detected and recorded. The corrected outdoor heat exchanger temperature ΔT3 can be calculated by the formula ΔT3 = (T3 - T30) - M * (T4 - T40), where M is a constant less than or equal to 1.

[0050] The conditions for determining that the air conditioner enters the reverse defrost mode may further include any one of the following: the corrected outdoor heat exchanger temperature is less than the first compensation temperature threshold (such as ΔT3set1), or, within the first duration (such as Bypasstime1), the air conditioner has been operating in the first non-reverse defrost mode or the second non-reverse defrost mode and has not entered the reverse defrost mode, or, within the second duration (such as Bypasstime2), the air conditioner has been operating in the third non-reverse defrost mode and has not entered the reverse defrost mode. When any one of the above conditions is met, the air conditioner is controlled to execute the reverse defrost mode to ensure that there is no frost on the surface of the outdoor heat exchanger.

[0051] It should be noted that the first duration and the second duration are timed after the air conditioner starts heating and the compressor starts running. Only when the air conditioner has performed a reverse defrost mode once, the first duration and the second duration are cleared.

[0052] In some embodiments of the present invention, determining a non-reversing defrosting mode according to the outdoor ambient temperature and the outdoor ambient humidity includes: determining a humidity range threshold corresponding to the outdoor ambient humidity according to the temperature range in which the outdoor ambient temperature is located; when the outdoor ambient humidity is within the corresponding humidity range threshold, determining that the non-reversing defrosting mode is the first non-reversing defrosting mode or the second non-reversing defrosting mode; when the outdoor ambient humidity is not within the corresponding humidity range threshold, determining that the non-reversing defrosting mode is the third non-reversing defrosting mode.

[0053] Specifically, after obtaining the outdoor ambient temperature, according to the temperature range in which the outdoor ambient temperature is located, determine the humidity range threshold corresponding to the outdoor ambient humidity. For example, as Figure 2 shown, when T4set1 ≤ T4 < T4set2, the corresponding humidity range threshold is RHset5 ≤ RH < RHset2; when T4set2 ≤ T4 < T4set3, the corresponding humidity range threshold is eT4 + f ≤ RH < aT4 + b; when T4set3 ≤ T4 < T4set4, the corresponding humidity range threshold is RHset6 ≤ RH < RHset3; when T4set4 ≤ T4 < T4set5, the corresponding humidity range threshold is gT4 + h ≤ RH < cT4 + d; when T4 ≥ T4set5, the corresponding humidity range threshold is RHset4 ≤ RH < RHset1, where a, b, c, d, e, f, g, h are constants, and the magnitude relationship of the outdoor ambient humidity thresholds is RHset6 < RHset5 < RHset4 < RHset3 < RHset2 < RHset1. When the outdoor ambient humidity is within the corresponding humidity range threshold, the air conditioner enters the first non-reversing defrosting mode or the second non-reversing defrosting mode; when the outdoor ambient humidity is not within the corresponding humidity range threshold, the air conditioner enters the third non-reversing defrosting mode. Since when the outdoor ambient humidity is within a certain range, the frosting speed of the air conditioner is different, the first non-reversing defrosting mode and the second non-reversing defrosting mode can be coupled and controlled to avoid directly entering the reversing defrosting mode after running the first non-reversing defrosting mode multiple times, so as to achieve long-term continuous heating of the air conditioner. When the outdoor ambient humidity is lower than a certain value, the air conditioner has less frosting and slower frosting, and only the third non-reversing defrosting mode is used to quickly defrost the frost layer, so as to achieve smaller temperature fluctuations and longer continuous heating duration.

[0054] In some embodiments of the present invention, the above-mentioned defrosting control method of the air conditioner further includes: when the outdoor ambient humidity is on the rise, judging the defrosting mode according to the corresponding humidity range threshold plus a preset compensation value; when the outdoor ambient humidity is on the decline, judging the defrosting mode according to the corresponding humidity range threshold minus a preset compensation value. Among them, the preset compensation value can be calibrated according to the actual situation.

[0055] Specifically, when the air conditioner is in the heating operation, the outdoor ambient humidity is detected in real time, and the threshold value of the humidity range is compensated according to the change trend of the outdoor ambient humidity. For example, as Figure 3 shown, when it is detected that the outdoor ambient humidity is on the rise compared to the previous moment, the defrost mode is judged according to the corresponding humidity range threshold RH plus the preset compensation value ΔRH. When it is detected that the outdoor ambient humidity is on the decline compared to the previous moment, the defrost mode is judged according to the corresponding humidity range threshold RH minus the preset compensation value ΔRH, so as to avoid inaccurate selection of the control method for the non-reversing defrost mode when the outdoor ambient humidity fluctuates at the division critical point.

[0056] In some embodiments of the present invention, the defrost control method of the above-mentioned air conditioner further includes: when judging the defrost mode according to the compensated corresponding humidity range threshold, if it is determined from the outdoor ambient humidity that the defrost mode is switched from the reversing defrost mode to the non-reversing defrost mode, the defrost mode is kept unchanged as the reversing defrost mode; if it is determined from the outdoor ambient humidity that the defrost mode is switched from the non-reversing defrost mode to the reversing defrost mode, and the air conditioner is in the heating operation stage, the air conditioner is controlled to operate in the reversing defrost mode; if it is determined from the outdoor ambient humidity that the defrost mode is switched from the non-reversing defrost mode to the reversing defrost mode, and the air conditioner is performing the non-reversing defrost mode, the defrost mode is rejudged after the defrost is completed.

[0057] Specifically, since the outdoor ambient humidity changes and the defrost mode also changes during the operation of the air conditioner, it is necessary to judge the defrost mode according to the compensated corresponding humidity range threshold. When judging the defrost mode according to the compensated corresponding humidity range threshold, if the air conditioner is switched from the reversing defrost mode to the non-reversing defrost mode, the defrost mode of the air conditioner is kept unchanged as the reversing defrost mode; if the air conditioner is switched from the non-reversing defrost mode to the reversing defrost mode, and the air conditioner is in the heating operation stage, the air conditioner is controlled to operate in the reversing defrost mode. If the air conditioner is switched from the non-reversing defrost mode to the reversing defrost mode, and the air conditioner is performing the non-reversing defrost mode, the defrost mode is rejudged after the defrost is completed. Thereby, the defrost frequency of the air conditioner can be reduced, and the heating experience of the user can be improved.

[0058] In some embodiments of the present invention, determining the non-reversing defrost mode as the second non-reversing defrost mode includes: the corrected outdoor heat exchanger temperature is less than the second compensation temperature threshold; the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a second preset time; the sum of the indoor ambient temperature and the outdoor ambient temperature is less than a second preset value; the heating operation time of the air conditioner reaches a second set duration; the previous operation was in the first non-reversing defrost mode, or the first non-reversing defrost mode has been continuously operated for a first preset number of times; wherein, the second compensation temperature threshold is greater than the first compensation temperature threshold, the fourth heat exchanger temperature threshold is greater than the third heat exchanger temperature threshold, the second set duration is greater than the first set duration, and the second preset value can be calibrated according to the actual situation.

[0059] Specifically, when the outdoor ambient humidity is within the corresponding humidity interval threshold, enter the first non-reversing defrost mode or the second non-reversing defrost mode. If the corrected outdoor heat exchanger temperature ΔT3 is less than the second compensation temperature threshold (such as ΔT3set2), and the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold (such as T3set3), and the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold (such as T3set4) and lasts for a second preset time (such as t3), and the sum of the indoor ambient temperature and the outdoor ambient temperature is less than a second preset value (such as α), it is detected that the heating operation time of the air conditioner reaches a second set duration (such as Tset2), and the air conditioner was previously operated in the first non-reversing defrost mode, or the air conditioner has been continuously operated in the first non-reversing defrost mode for a first preset number of times (such as N times), it indicates that the frost layer on the outdoor heat exchanger is relatively thick and the defrosting time is relatively long. Then, control the air conditioner to enter the second non-reversing defrost mode to reduce defrosting abnormal noise, extend the continuous heating duration, and improve the user's heating experience.

[0060] In some embodiments of the present invention, determining the non-reversing defrost mode as the first non-reversing defrost mode includes: the corrected outdoor heat exchanger temperature is less than the third compensation temperature threshold; the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a third preset time; the heating operation time of the air conditioner reaches a third set duration; wherein, the third compensation temperature threshold is greater than the second compensation temperature threshold, the third preset time is greater than the second preset time, and the third set duration is greater than the first set duration.

[0061] Specifically, when the outdoor ambient humidity is within the corresponding humidity interval threshold, the first non-reversing defrost mode or the second non-reversing defrost mode is entered. If the corrected outdoor heat exchanger temperature ΔT3 is less than the third compensation temperature threshold (such as ΔT3set3), and the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold (such as T3set3), and the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold (such as T3set4) and lasts for the third preset time (such as t4), and the heating operation time of the air conditioner reaches the third set duration (such as Tset3), it indicates that the frost layer on the outdoor heat exchanger is thin and the defrosting time is short. Then, the air conditioner is controlled to enter the first non-reversing defrost mode to reduce defrosting abnormal sounds, extend the continuous heating duration, and improve the user's heating experience.

[0062] In some embodiments of the present invention, determining the non-reversing defrost mode as the third non-reversing defrost mode includes: the corrected outdoor heat exchanger temperature is less than the fourth compensation temperature threshold; the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for the fourth preset time; the heating operation time of the air conditioner reaches the fourth set duration; wherein, the fourth compensation temperature threshold is greater than the third compensation temperature threshold, the fourth preset time is greater than the third preset time, and the fourth set duration is greater than the first set duration.

[0063] Specifically, when the outdoor ambient humidity is not within the corresponding humidity interval threshold, if the corrected outdoor heat exchanger temperature ΔT3 is less than the fourth compensation temperature threshold (such as ΔT3set4), and the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold (such as T3set3), it is detected that the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold (such as T3set4) and lasts for the fourth preset time (such as t5), and the heating operation time of the air conditioner reaches the fourth set duration (such as Tset4), it indicates that there is less frosting and the frosting is slow. At this time, the air conditioner is controlled to enter the third non-reversing defrost mode, and the frost layer can be quickly processed only through the third non-reversing defrost mode, and smaller temperature fluctuations and continuous heating durations can be achieved.

[0064] It should be noted that except for the first duration and the second duration, the remaining time is cleared after the current judgment to enter the reversing defrost mode or determine the end of the non-reversing defrost mode.

[0065] In some embodiments of the present invention, the defrost control of the air conditioner according to the second non-reversing defrost mode includes: controlling the four-way valve not to reverse, the compressor to operate at the first operating frequency, the outdoor fan to stop, the electronic expansion valve to be at the first preset opening, and the speed of the indoor fan to decrease at a preset rate. The first preset opening and the preset rate can be calibrated according to the actual situation.

[0066] Specifically, when it is determined that the non-reversing defrosting mode of the air conditioner is the second non-reversing defrosting mode, the four-way valve is controlled not to reverse, the compressor operates at the first operating frequency, the outdoor fan stops, the electronic expansion valve is at the first preset opening degree, and the rotational speed of the indoor fan decreases at a preset rate, so that the air conditioner can be defrosted. Among them, the second non-reversing defrosting mode is for the situation where the air conditioner has relatively thick frost (thicker than the first non-reversing defrosting mode). This mode has a longer defrosting time, can reduce the defrosting frequency of the air conditioner, reduce the temperature fluctuation of the indoor environment, reduce defrosting abnormal noise, and improve the user's heating experience.

[0067] In some embodiments of the present invention, the defrosting control of the air conditioner according to the first non-reversing defrosting mode includes: controlling the four-way valve not to reverse, the compressor operating at the second operating frequency, the outdoor fan stopping, the electronic expansion valve being at the second preset opening degree, and the rotational speed of the indoor fan remaining unchanged; wherein, the second operating frequency is less than the first operating frequency, and the second preset opening degree can be calibrated according to the actual situation.

[0068] Specifically, when it is determined that the non-reversing defrosting mode of the air conditioner is the first non-reversing defrosting mode, the four-way valve is controlled not to reverse, the compressor operates at the second operating frequency, the outdoor fan stops, the electronic expansion valve is at the second preset opening degree, and the rotational speed of the indoor fan remains unchanged, so as to defrost quickly. Among them, the first non-reversing defrosting mode is for the situation where the air conditioner has thin frost. This mode has a shorter defrosting process, can reduce the temperature fluctuation of the indoor environment, reduce defrosting abnormal noise, and improve the user's heating experience.

[0069] In some embodiments of the present invention, the defrosting control of the air conditioner according to the third non-reversing defrosting mode includes: controlling the four-way valve not to reverse, the compressor operating at the third operating frequency, the outdoor fan stopping, the electronic expansion valve being at the third preset opening degree, and the rotational speed of the indoor fan remaining unchanged; wherein, the third operating frequency is less than the first operating frequency, and the third preset opening degree can be calibrated according to the actual situation.

[0070] Specifically, when it is determined that the non-reversing defrosting mode of the air conditioner is the third non-reversing defrosting mode, the four-way valve is controlled not to reverse, the compressor operates at the third operating frequency, the outdoor fan stops, the electronic expansion valve is at the third preset opening degree, and the rotational speed of the indoor fan remains unchanged, so as to defrost quickly. This mode has a shorter defrosting process. This mode is similar to the first non-reversing defrosting mode, but the difference is that after entering this mode, some judgment conditions change, and at the same time, values such as the rotational speed of the indoor fan, the operating frequency of the compressor, and the opening degree of the electronic expansion valve are also adjusted accordingly, which can reduce the defrosting frequency of the air conditioner, achieve smaller temperature fluctuations and longer continuous heating duration, reduce defrosting abnormal noise, and improve the user's heating experience.

[0071] As a specific example, such as Figure 4As shown, the defrosting control method of the air conditioner of the present invention may include the following steps:

[0072] S101, the air conditioner starts heating.

[0073] S102, the air conditioner operates in heating mode for a first set duration.

[0074] S103, determine whether it is established that the air conditioner meets the condition for entering the reverse defrosting mode according to the outdoor heat exchanger temperature T3, the outdoor ambient temperature T4, and the outdoor ambient humidity RH. If yes, execute step S104; if no, execute step S105.

[0075] S104, control the compressor to stop and then switch the direction of the four-way valve, and then start the compressor to run to control the air conditioner for reverse defrosting.

[0076] S105, determine whether it is established that the non-reverse defrosting mode is the first non-reverse defrosting mode or the second non-reverse defrosting mode according to the outdoor ambient temperature T4 and the outdoor ambient humidity RH. If yes, execute step S108; if no, execute step S106.

[0077] S106, the non-reverse defrosting mode is the third non-reverse defrosting mode.

[0078] S107, control the four-way valve not to reverse, the compressor to run at a third operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a third preset opening, and the speed of the indoor fan to remain unchanged.

[0079] S108, determine whether it is established that the non-reverse defrosting mode is the first non-reverse defrosting mode. If yes, execute step S109; if no, execute step S110.

[0080] S109, control the four-way valve not to reverse, the compressor to run at a second operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a second preset opening, and the speed of the indoor fan to remain unchanged.

[0081] S110, the non-reverse defrosting mode is the second non-reverse defrosting mode.

[0082] S111, control the four-way valve not to reverse, the compressor to run at a first operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a first preset opening, and the speed of the indoor fan to decrease at a preset rate.

[0083] It should be noted that the specific values mentioned above are only for detailed illustration of the implementation of the present invention as examples, and should not be construed as a limitation of the present invention. In other examples, embodiments, or implementations, other values can be selected according to the present invention, and no specific limitation is made here.

[0084] Therefore, based on adding the judgment of the outdoor ambient humidity threshold during the heating and defrosting of the air conditioner, different defrosting control strategies are implemented according to different temperature and humidity ranges, which can reduce the defrosting frequency of the air conditioner, reduce the indoor ambient temperature fluctuation, reduce the defrosting abnormal noise, extend the continuous heating duration, and broaden the applicable range of the non-reversing defrosting control method, thus enhancing the user's heating experience.

[0085] In summary, for the defrosting control method of the air conditioner according to the embodiment of the present invention, when the air conditioner operates in heating mode for a first set duration, the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity are obtained. When it is determined that the air conditioner does not meet the conditions for entering the reversing defrosting mode based on the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity, the non-reversing defrosting mode is determined according to the outdoor ambient temperature and the outdoor ambient humidity, and the air conditioner is controlled for defrosting according to the non-reversing defrosting mode. Therefore, when the air conditioner operates in heating mode, the non-reversing defrosting mode is determined according to different temperature and humidity ranges, and the corresponding defrosting control method is applied to the air conditioner according to the determined non-reversing defrosting mode, thereby reducing the defrosting frequency of the air conditioner, reducing the indoor temperature fluctuation, reducing the defrosting abnormal noise, extending the continuous heating duration, and enhancing the user's heating experience.

[0086] Corresponding to the above embodiment, the present invention also proposes a defrosting control device for an air conditioner.

[0087] As Figure 5 shown, the defrosting control device 100 of the air conditioner according to the embodiment of the present invention may include: an acquisition module 110, a determination module 120, and a control module 130.

[0088] Among them, the acquisition module 110 is configured to obtain the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity when the air conditioner operates in heating mode for a first set duration. The determination module 120 is configured to determine the non-reversing defrosting mode according to the outdoor ambient temperature and the outdoor ambient humidity when it is determined that the air conditioner does not meet the conditions for entering the reversing defrosting mode based on the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity. The control module 130 is configured to control the air conditioner for defrosting according to the non-reversing defrosting mode.

[0089] In some embodiments of the present invention, the conditions for entering the reversing defrosting mode include any one of the following: the outdoor heat exchanger temperature is less than the first heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the second heat exchanger temperature threshold and lasts for a first preset time; the indoor ambient temperature is less than the first indoor temperature threshold and the sum of the indoor ambient temperature and the outdoor ambient temperature is less than a first preset value; the outdoor ambient humidity is greater than or equal to the preset humidity threshold, wherein the determination module 120 determines the outdoor ambient humidity threshold according to the temperature range where the outdoor ambient temperature is located; wherein, the second heat exchanger temperature threshold is greater than the first heat exchanger temperature threshold.

[0090] In some embodiments of the present invention, the conditions for entering the reverse defrost mode further include any one of the following: the corrected outdoor heat exchanger temperature is less than the first compensation temperature threshold; during the first duration, operating according to the first non-reverse defrost mode or the second non-reverse defrost mode and not entering the reverse defrost mode; during the second duration, operating according to the third non-reverse defrost mode and not entering the reverse defrost mode; wherein, the corrected outdoor heat exchanger temperature is determined based on the initial outdoor heat exchanger temperature, the initial outdoor ambient temperature, the current outdoor heat exchanger temperature, and the current outdoor ambient temperature within a preset time interval, and the first duration is less than the second duration.

[0091] In some embodiments of the present invention, the determination module 120 determines the non-reverse defrost mode based on the outdoor ambient temperature and the outdoor ambient humidity, and specifically is used for: determining the humidity interval threshold corresponding to the outdoor ambient humidity according to the temperature interval where the outdoor ambient temperature is located; when the outdoor ambient humidity is within the corresponding humidity interval threshold, determining the non-reverse defrost mode as the first non-reverse defrost mode or the second non-reverse defrost mode; when the outdoor ambient humidity is not within the corresponding humidity interval threshold, determining the non-reverse defrost mode as the third non-reverse defrost mode.

[0092] In some embodiments of the present invention, the determination module 120 is further used for, when the outdoor ambient humidity is in an upward trend, judging the defrost mode according to the corresponding humidity interval threshold plus a preset compensation value; when the outdoor ambient humidity is in a downward trend, judging the defrost mode according to the corresponding humidity interval threshold minus a preset compensation value.

[0093] In some embodiments of the present invention, the determination module 120 is further used for, when judging the defrost mode according to the compensated corresponding humidity interval threshold, if it is determined to switch from the reverse defrost mode to the non-reverse defrost mode based on the outdoor ambient humidity, keeping the defrost mode unchanged as the reverse defrost mode; if it is determined to switch from the non-reverse defrost mode to the reverse defrost mode based on the outdoor ambient humidity and the air conditioner is in the heating operation stage, controlling the air conditioner to operate in the reverse defrost mode; if it is determined to switch from the non-reverse defrost mode to the reverse defrost mode based on the outdoor ambient humidity and the air conditioner is performing the non-reverse defrost mode, re-judging the defrost mode after the defrost is completed.

[0094] In some embodiments of the present invention, the determination module 120 determines that the non-reversing defrosting mode is the second non-reversing defrosting mode, specifically for: the corrected outdoor heat exchanger temperature is less than the second compensation temperature threshold; the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a second preset time; the sum of the indoor ambient temperature and the outdoor ambient temperature is less than a second preset value; the heating operation time of the air conditioner reaches a second set duration; the previous operation is in the first non-reversing defrosting mode, or the first non-reversing defrosting mode is continuously operated for a first preset number of times; wherein, the second compensation temperature threshold is greater than the first compensation temperature threshold, the fourth heat exchanger temperature threshold is greater than the third heat exchanger temperature threshold, and the second set duration is greater than the first set duration.

[0095] In some embodiments of the present invention, the determination module 120 determines that the non-reversing defrosting mode is the first non-reversing defrosting mode, specifically for: the corrected outdoor heat exchanger temperature is less than the third compensation temperature threshold; the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a third preset time; the heating operation time of the air conditioner reaches a third set duration; wherein, the third compensation temperature threshold is greater than the second compensation temperature threshold, the third preset time is greater than the second preset time, and the third set duration is greater than the first set duration.

[0096] In some embodiments of the present invention, the determination module 120 determines that the non-reversing defrosting mode is the third non-reversing defrosting mode, specifically for: the corrected outdoor heat exchanger temperature is less than the fourth compensation temperature threshold; the outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; the outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a fourth preset time; the heating operation time of the air conditioner reaches a fourth set duration; wherein, the fourth compensation temperature threshold is greater than the third compensation temperature threshold, the fourth preset time is greater than the third preset time, and the fourth set duration is greater than the first set duration.

[0097] In some embodiments of the present invention, the control module 130 performs defrosting control on the air conditioner according to the second non-reversing defrosting mode, specifically for: controlling the four-way valve not to reverse, the compressor to operate at a first operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a first preset opening, and the rotational speed of the indoor fan to decrease at a preset rate.

[0098] In some embodiments of the present invention, the control module 130 performs defrosting control on the air conditioner according to the first non-reversing defrosting mode, specifically for: controlling the four-way valve not to reverse, the compressor to operate at a second operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a second preset opening, and the rotational speed of the indoor fan to remain unchanged; wherein, the second operating frequency is less than the first operating frequency.

[0099] In some embodiments of the present invention, the control module 130 performs defrosting control on the air conditioner according to the third non-reversing defrosting mode, specifically for: controlling the four-way valve not to reverse, the compressor to operate at the third operating frequency, the outdoor fan to stop, the electronic expansion valve to be at the third preset opening degree, and the rotational speed of the indoor fan to remain unchanged; wherein, the third operating frequency is less than the first operating frequency.

[0100] It should be noted that for the details not disclosed in the defrosting control device of the air conditioner in the embodiments of the present invention, please refer to the details disclosed in the defrosting control method of the air conditioner in the embodiments of the present invention, and will not be elaborated herein. [[ID=,4]]

[0101] According to the defrosting control device of the air conditioner in the embodiments of the present invention, when the air conditioner is in the heating operation for the first set duration, the acquisition module acquires the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity. When the determination module determines that the air conditioner does not meet the conditions for entering the reversing defrosting mode based on the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity, it determines the non-reversing defrosting mode according to the outdoor ambient temperature and the outdoor ambient humidity, and the control module performs defrosting control on the air conditioner according to the non-reversing defrosting mode. Thus, when the air conditioner is in the heating operation, the device determines the non-reversing defrosting mode in which it is located according to different temperature and humidity ranges, and makes corresponding defrosting control methods for the air conditioner according to the non-reversing defrosting mode in which it is located, thereby reducing the defrosting frequency of the air conditioner, reducing the indoor temperature fluctuation, reducing the defrosting abnormal noise, prolonging the continuous heating duration, and improving the user's heating experience.

[0102] Corresponding to the above embodiments, the present invention also proposes a computer-readable storage medium.

[0103] The computer-readable storage medium of the present invention stores a defrosting control program for an air conditioner. When the defrosting control program for the air conditioner is executed by a processor, it implements the above-mentioned defrosting control method for the air conditioner.

[0104] The computer-readable storage medium of the embodiments of the present invention can reduce the defrosting frequency of the air conditioner, reduce the indoor temperature fluctuation, reduce the defrosting abnormal noise, prolong the continuous heating duration, and improve the user's heating experience by executing the above-mentioned defrosting control method for the air conditioner.

[0105] Corresponding to the above embodiments, the present invention also proposes an air conditioner.

[0106] As Figure 6 [[ID=2,3]]shown, the air conditioner 200 of the embodiments of the present invention includes a memory 210, a processor 220, and a defrosting control program for an air conditioner stored on the memory 210 and executable on the processor 220. When the processor 220 executes the defrosting control program for the air conditioner, it implements the above-mentioned defrosting control method for the air conditioner.

[0107] According to the air conditioner of the embodiment of the present invention, by executing the above-mentioned defrost control method of the air conditioner, the defrost frequency of the air conditioner can be reduced, the indoor temperature fluctuation can be reduced, the defrosting abnormal noise can be reduced, the continuous heating duration can be extended, and the user's heating experience can be improved.

[0108] It should be noted that the logic and / or steps represented in the flowchart or described in other ways herein, for example, can be considered as a definite sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch instructions from the instruction execution system, apparatus, or device and execute the instructions), or in combination with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion (electronic device) having one or more wirings, a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or otherwise processing as appropriate, and then storing it in a computer memory.

[0109] It should be understood that each part of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiment, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0110] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0111] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0112] In the present invention, unless otherwise clearly stipulated and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0113] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A defrosting control method for an air conditioner, characterized in that, The method includes: When the air conditioner operates in heating mode for a first set duration, obtain the temperature of the outdoor heat exchanger, the outdoor ambient temperature, and the outdoor ambient humidity; When it is determined that the air conditioner does not meet the conditions for entering the reverse defrost mode based on the temperature of the outdoor heat exchanger, the outdoor ambient temperature, and the outdoor ambient humidity, determine the non-reverse defrost mode based on the outdoor ambient temperature and the outdoor ambient humidity; Perform defrost control on the air conditioner according to the non-reverse defrost mode.

2. The method according to claim 1, characterized in that, The conditions for entering the reverse defrost mode include any one of the following: The temperature of the outdoor heat exchanger is less than a first heat exchanger temperature threshold; The temperature of the outdoor heat exchanger is less than a second heat exchanger temperature threshold and lasts for a first preset time; The indoor ambient temperature is less than a first indoor temperature threshold and the sum of the indoor ambient temperature and the outdoor ambient temperature is less than a first preset value; The outdoor ambient humidity is greater than or equal to a preset humidity threshold, where the outdoor ambient humidity threshold is determined according to the temperature range where the outdoor ambient temperature is located; Wherein, the second heat exchanger temperature threshold is greater than the first heat exchanger temperature threshold.

3. The method according to claim 2, wherein The conditions for entering the reverse defrost mode also include any one of the following: The corrected temperature of the outdoor heat exchanger is less than a first compensation temperature threshold; During a first duration, operate in a first non-reverse defrost mode or a second non-reverse defrost mode and have not entered the reverse defrost mode; During a second duration, operate in a third non-reverse defrost mode and have not entered the reverse defrost mode; Wherein, the corrected temperature of the outdoor heat exchanger is determined based on the initial temperature of the outdoor heat exchanger, the initial outdoor ambient temperature, the current temperature of the outdoor heat exchanger, and the current outdoor ambient temperature within a preset time interval, and the first duration is less than the second duration.

4. The method according to claim 3, wherein Determining the non-reverse defrost mode according to the outdoor ambient temperature and the outdoor ambient humidity includes: Determine the humidity interval threshold corresponding to the outdoor ambient humidity according to the temperature range where the outdoor ambient temperature is located; When the outdoor ambient humidity is within the corresponding humidity interval threshold, determine that the non-reverse defrost mode is a first non-reverse defrost mode or a second non-reverse defrost mode; When the outdoor ambient humidity is not within the corresponding humidity interval threshold, determine that the non-reverse defrost mode is a third non-reverse defrost mode.

5. The method according to any one of claims 2 - 4, characterized in that, It also includes: When the outdoor ambient humidity is on the rise, judge the defrost mode according to the corresponding humidity interval threshold plus a preset compensation value; When the outdoor ambient humidity is on the decline, judge the defrost mode according to the corresponding humidity interval threshold minus a preset compensation value.

6. The method according to claim 5, wherein It also includes: When judging the defrost mode according to the compensated corresponding humidity interval threshold, if it is determined that the defrost mode is switched from the reverse defrost mode to the non-reverse defrost mode according to the outdoor ambient humidity, keep the defrost mode unchanged as the reverse defrost mode; If it is determined that the defrost mode is switched from the non-reverse defrost mode to the reverse defrost mode according to the outdoor ambient humidity, and the air conditioner is in the heating operation stage, control the air conditioner to operate in the reverse defrost mode; If it is determined to switch from the non-reversing defrost mode to the reversing defrost mode according to the outdoor ambient humidity, and the air conditioner executes the non-reversing defrost mode, then the defrost mode is re-judged after defrosting is completed.

7. The method according to claim 4, wherein Determining that the non-reversing defrost mode is the second non-reversing defrost mode includes: The corrected outdoor heat exchanger temperature is less than the second compensation temperature threshold; The outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; The outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a second preset time; The sum of the indoor ambient temperature and the outdoor ambient temperature is less than a second preset value; The heating operation time of the air conditioner reaches a second set duration; The previous operation was in the first non-reversing defrost mode, or the first non-reversing defrost mode was continuously operated for a first preset number of times; Wherein, the second compensation temperature threshold is greater than the first compensation temperature threshold, the fourth heat exchanger temperature threshold is greater than the third heat exchanger temperature threshold, and the second set duration is greater than the first set duration.

8. The method according to claim 7, wherein Determining that the non-reversing defrost mode is the first non-reversing defrost mode includes: The corrected outdoor heat exchanger temperature is less than the third compensation temperature threshold; The outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; The outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a third preset time; The heating operation time of the air conditioner reaches a third set duration; wherein, the third compensation temperature threshold is greater than the second compensation temperature threshold, the third preset time is greater than the second preset time, and the third set duration is greater than the first set duration.

9. The method according to claim 8, wherein Determining that the non-reversing defrost mode is the third non-reversing defrost mode includes: The corrected outdoor heat exchanger temperature is less than the fourth compensation temperature threshold; The outdoor heat exchanger temperature is less than the third heat exchanger temperature threshold; The outdoor heat exchanger temperature is less than the fourth heat exchanger temperature threshold and lasts for a fourth preset time; The heating operation time of the air conditioner reaches a fourth set duration; Wherein, the fourth compensation temperature threshold is greater than the third compensation temperature threshold, the fourth preset time is greater than the third preset time, and the fourth set duration is greater than the first set duration.

10. The method according to claim 7, wherein Performing defrost control on the air conditioner according to the second non-reversing defrost mode includes: Controlling the four-way valve not to reverse, the compressor to operate at a first operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a first preset opening, and the speed of the indoor fan to decrease at a preset rate.

11. The method according to claim 10, wherein Performing defrost control on the air conditioner according to the first non-reversing defrost mode includes: Controlling the four-way valve not to reverse, the compressor to operate at a second operating frequency, the outdoor fan to stop, the electronic expansion valve to be at a second preset opening, and the speed of the indoor fan to remain unchanged; wherein, the second operating frequency is less than the first operating frequency.

12. The method according to claim 10 or 11, characterized in that Performing defrost control on the air conditioner according to the third non-reversing defrost mode includes: Control the four-way valve not to change direction, operate the compressor at the third operating frequency, stop the outdoor fan, set the electronic expansion valve to the third preset opening, and keep the speed of the indoor fan unchanged; wherein, the third operating frequency is less than the first operating frequency.

13. A defrosting control device for an air conditioner, characterized in that, It includes: An acquisition module, configured to acquire the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity when the air conditioner operates in the heating mode for a first set duration. A determination module, configured to determine the non-reversing defrost mode according to the outdoor ambient temperature and the outdoor ambient humidity when it is determined that the air conditioner does not meet the conditions for entering the reversing defrost mode based on the outdoor heat exchanger temperature, the outdoor ambient temperature, and the outdoor ambient humidity. A control module, configured to perform defrost control on the air conditioner according to the non-reversing defrost mode.

14. A computer-readable storage medium, characterized in that, Stored thereon is a defrost control program for an air conditioner. When the defrost control program of the air conditioner is executed by a processor, it implements the defrost control method for the air conditioner according to any one of claims 1-12.

15. An air conditioner, characterized in that, It includes a memory, a processor, and a defrost control program for an air conditioner stored on the memory and executable on the processor. When the processor executes the defrost control program of the air conditioner, it implements the defrost control method for the air conditioner according to any one of claims 1-12.

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