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

Abstract

The application discloses a kind of air conditioner defrosting control method, device, air conditioner and computer readable storage medium, obtain the evaporator temperature of the air conditioner;If the evaporator temperature meets frost formation condition, target control pulse signal is sent to the electronic expansion valve of the air conditioner, and the opening degree of the electronic expansion valve is adjusted based on the voltage value of the target control pulse signal;If the electronic expansion valve executes the target control pulse signal, the four-way valve of the air conditioner is controlled to reverse, and defrosting operation is executed.The application can effectively improve the comfort of air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, specifically to an air conditioning defrosting control method, device, air conditioner, and computer-readable storage medium. Background Technology

[0002] When an air conditioner operates in heating mode during winter, the outdoor unit is located in a cold environment, and the heat exchanger in the outdoor unit also needs to absorb heat from the environment. This results in a low surface temperature of the heat exchanger, causing frost to form on the outdoor unit and affecting the air conditioner's heating performance. A common defrosting control logic involves periodically controlling the air conditioner to perform a defrosting operation. During defrosting, the air conditioner switches from heating mode to cooling mode, causing the outdoor heat exchanger to release heat and melt the frost. However, frequent defrosting operations can severely impact the air conditioner's heating efficiency, leading to a decrease in comfort. Summary of the Invention

[0003] This invention provides an air conditioner defrosting control method, device, air conditioner, and computer-readable storage medium, aiming to effectively improve the comfort of air conditioning.

[0004] In a first aspect, embodiments of the present invention provide an air conditioner defrosting control method, the air conditioner defrosting control method comprising:

[0005] Obtain the evaporator temperature of the air conditioner;

[0006] If the evaporator temperature meets the frosting conditions, a target control pulse signal is sent to the electronic expansion valve of the air conditioner to control the electronic expansion valve to adjust its opening based on the voltage value of the target control pulse signal.

[0007] If the electronic expansion valve completes the target control pulse signal, it controls the four-way valve of the air conditioner to switch direction and perform defrosting operation.

[0008] Optionally, after sending the target control pulse signal to the electronic expansion valve of the air conditioner, the method further includes:

[0009] Obtain the number of times the control pulse signal was sent within a historical time period;

[0010] If the number of transmissions is greater than or equal to a preset threshold, then if the electronic expansion valve completes the execution of the target control pulse signal, then the four-way valve of the air conditioner is controlled to switch to perform a defrosting operation.

[0011] If the number of transmissions is less than a preset threshold, a target frequency reduction value is determined based on the number of transmissions and a preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value.

[0012] Optionally, before determining the target frequency reduction value based on the number of transmissions and a preset frequency reduction table, and controlling the air conditioner to reduce the compressor frequency based on the target frequency reduction value, the method further includes:

[0013] Obtain the historical transmission time of the most recent historical control pulse signal;

[0014] Based on the historical transmission time, determine the transmission interval between the most recent historical control pulse signal and the target control pulse signal;

[0015] If the transmission interval is less than a preset time, then the target frequency reduction value is determined based on the number of transmissions and a preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value.

[0016] Optionally, after sending the target control pulse signal to the electronic expansion valve of the air conditioner, the method further includes:

[0017] The target control pulse signal is input into a preset signal modulation module to obtain a wind speed control pulse signal;

[0018] The air conditioner sends a wind speed control pulse signal to the indoor fan, and controls the indoor fan to adjust its wind speed based on the voltage value of the wind speed control pulse signal.

[0019] Optionally, before sending the target control pulse signal to the electronic expansion valve of the air conditioner if the evaporator temperature meets the frosting conditions, the method further includes:

[0020] Obtain the operating opening degree of the air conditioning electronic expansion valve;

[0021] A low-level value is set according to the operating opening degree, and a high-level value is set according to the maximum opening degree of the electronic expansion valve;

[0022] The target control pulse signal is generated based on the low level value and the high level value.

[0023] Optionally, generating the target control pulse signal based on the low-level value and the high-level value includes:

[0024] Obtain the transmission frequency of the control pulse signal and the indoor ambient temperature within the historical time period;

[0025] Query the preset lookup table to determine the anti-frost duration corresponding to the transmission frequency, and determine the buffer duration corresponding to the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner;

[0026] The duty cycle is set according to the anti-frost duration and the buffer duration;

[0027] The target control pulse signal is generated based on the low level value, the high level value, and the duty cycle.

[0028] Optionally, after obtaining the evaporator temperature of the air conditioner, the method further includes:

[0029] The ambient temperature and humidity of the evaporator are obtained;

[0030] The frosting temperature threshold is determined based on the ambient temperature and the ambient humidity.

[0031] If the evaporator temperature is lower than the frosting temperature threshold, then the evaporator temperature is determined to meet the frosting conditions.

[0032] In a second aspect, embodiments of the present invention provide an air conditioner defrosting control device, the air conditioner defrosting control device comprising:

[0033] An acquisition module is used to acquire the evaporator temperature of the air conditioner;

[0034] The first control module is used to send a target control pulse signal to the electronic expansion valve of the air conditioner if the evaporator temperature meets the frosting conditions, and control the electronic expansion valve to adjust the opening degree based on the voltage value of the target control pulse signal.

[0035] The second control module is used to control the four-way valve of the air conditioner to switch direction and perform defrosting operation if the electronic expansion valve completes the execution of the target control pulse signal.

[0036] Thirdly, embodiments of the present invention also provide an air conditioner, including a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of any of the air conditioner defrosting control methods provided in the embodiments of the present invention.

[0037] Fourthly, embodiments of the present invention also provide a computer-readable storage medium, which includes a computer program. When the computer program is run on an electronic device, the computer program is used to cause the electronic device to perform the steps of any of the air conditioning defrosting control methods provided in the embodiments of the present invention.

[0038] This invention first obtains the evaporator temperature of the air conditioner. If the evaporator temperature meets the frosting conditions, a target control pulse signal is sent to the electronic expansion valve of the air conditioner. The electronic expansion valve adjusts its opening based on the voltage value of the target control pulse signal. After the electronic expansion valve completes the execution of the target control pulse signal, the four-way valve of the air conditioner is switched to perform a defrosting operation. The pulse signal is periodic, with both high and low levels within its signal period. This causes the control pulse signal to periodically exhibit high and low voltage values. The electronic expansion valve adjusts its opening based on the voltage value of the target control pulse signal, periodically increasing the opening and then returning to its initial opening before the increase. In the early stages after the evaporator temperature meets the frosting conditions, the periodic increase and decrease of the electronic expansion valve opening reduces fluctuations in indoor ambient temperature, slows down the frosting process, and delays the time it takes for the air conditioner to perform the defrosting operation, thus avoiding frequent fluctuations in indoor temperature. Therefore, the comfort of the air conditioner can be improved. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a flowchart illustrating one embodiment of the air conditioning defrosting control method provided in this invention.

[0041] Figure 2 This is a flowchart illustrating another embodiment of the air conditioning defrosting control method provided in this invention.

[0042] Figure 3 This is an example diagram of the control pulse signal provided in an embodiment of the present invention;

[0043] Figure 4 This is an example diagram of the opening degree change of the electronic expansion valve provided in the embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of the structure of the air conditioner defrosting control device provided in this embodiment of the invention;

[0045] Figure 6 This is a schematic diagram of the structure of the air conditioner provided in an embodiment of the present invention. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, in the description of the embodiments of the present invention, the terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, "multiple" means two or more, unless otherwise explicitly specified.

[0047] This invention provides an air conditioner defrosting control method, apparatus, air conditioner, and computer-readable storage medium.

[0048] Specifically, this embodiment will be described from the perspective of an air conditioner defrosting control device, which can be integrated into the air conditioner. That is, the air conditioner defrosting control method of this embodiment can be executed by the air conditioner.

[0049] The following detailed description is provided in conjunction with the accompanying drawings. In this embodiment, an air conditioner is used as the executing entity. It should be noted that the order of description in the following embodiments is not intended to limit the preferred order of the embodiments. Although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown in the accompanying drawings.

[0050] According to the background art description of the present invention, the air conditioner is periodically controlled to perform a defrosting operation. During the defrosting operation, the air conditioner switches from heating mode to cooling mode, causing the outdoor heat exchanger to release heat and melt the frost layer. However, frequent defrosting operations can seriously affect the heating effect of the air conditioner, resulting in a reduction in its heating efficiency.

[0051] To address the above problems, this invention discloses an air conditioning defrosting control method. Please refer to [the relevant documentation]. Figure 1 The specific process of this air conditioner defrosting control method can be summarized in steps S10 to S30, wherein:

[0052] Step S10: Obtain the evaporator temperature of the air conditioner;

[0053] In this embodiment, the air conditioner includes a compressor, evaporator, electronic expansion valve, condenser, four-way valve, etc. Both the evaporator and condenser are heat exchangers. The refrigerant is compressed in the compressor, changing from a low-pressure gas to a high-pressure gas. The high-pressure gas passes through the condenser, releasing heat during condensation and becoming a high-pressure liquid. The high-pressure liquid passes through the electronic expansion valve, where its pressure decreases. Simultaneously, due to the heat absorption during boiling and evaporation, its temperature also drops accordingly, becoming a low-pressure, low-temperature liquid. This low-pressure, low-temperature liquid enters the evaporator, absorbing heat during evaporation and becoming a low-pressure, low-temperature gas. It then re-enters the compressor, thus completing the air conditioner cycle. Because the refrigerant in the evaporator absorbs heat from the outside, the evaporator temperature decreases, causing frost to form on the evaporator surface. Frosting in air conditioners generally refers to frost forming on the evaporator surface, affecting the heat exchange efficiency of the evaporator and consequently impacting the air conditioner's performance. Whether frost formation conditions are met can be determined based on the evaporator temperature.

[0054] If the air conditioner is operating in heating mode, with the four-way valve in the first connected state, the outdoor heat exchanger acts as the evaporator, and obtaining the evaporator temperature is equivalent to obtaining the outdoor heat exchanger temperature. If the air conditioner is operating in cooling mode, with the four-way valve in the second connected state, the indoor heat exchanger acts as the evaporator, and obtaining the evaporator temperature is equivalent to obtaining the indoor heat exchanger temperature. Generally, when the outdoor ambient temperature is low, such as in winter, when the air conditioner enters heating mode, the indoor side needs to release heat, so the indoor heat exchanger acts as the condenser, and the outdoor heat exchanger acts as the evaporator. Furthermore, due to the low outdoor ambient temperature, the outdoor heat exchanger is more prone to frosting. Therefore, obtaining the evaporator temperature may also include, if the air conditioner is operating in heating mode, obtaining the outdoor heat exchanger temperature as the evaporator temperature.

[0055] Step S20: If the evaporator temperature meets the frosting conditions, a target control pulse signal is sent to the electronic expansion valve of the air conditioner to control the electronic expansion valve to adjust its opening based on the voltage value of the target control pulse signal.

[0056] In this embodiment, the lower the evaporator temperature, the easier it is for moisture on the evaporator surface to condense into frost. Therefore, when the evaporator temperature is below the temperature threshold, it is determined that the evaporator temperature meets the frosting conditions, and frost will gradually begin to form on the evaporator surface. The control pulse signal is a periodic electrical signal, referencing... Figure 3 For example, within one signal cycle, the control pulse signal exists in a high-level state and a low-level state. The voltage value of the signal region corresponding to the high-level state is higher than the voltage value of the signal region corresponding to the low-level state, causing the control pulse signal to periodically appear in a high-voltage state and then in a low-voltage state.

[0057] The target control pulse signal is the control pulse signal that needs to be sent to the electronic expansion valve. The target control pulse signal can also be a control pulse signal determined based on the current operating parameters of the air conditioner to achieve a better delayed defrosting effect. This target control pulse signal can be sent to the air conditioner's electronic expansion valve. The electronic expansion valve adjusts its opening according to the voltage value; different voltage values ​​correspond to different openings. The target control pulse signal also periodically shows high voltage values ​​followed by low voltage values. The electronic expansion valve adjusts its opening according to the voltage value of the target control pulse signal, periodically increasing and then decreasing its opening. Within each signal cycle, the control pulse signal can first show a level state that increases the opening of the electronic expansion valve, and then show a level state that decreases its opening. If a high level state increases the opening of the electronic expansion valve and a low level state decreases its opening, then the control pulse signal's signal cycle will show a high level state followed by a low level state, causing the electronic expansion valve opening to increase and then decrease within each signal cycle. Due to the stability of the target control pulse signal, the electronic expansion valve can be opened and closed more stably and efficiently (the actions of increasing and decreasing the opening alternate).

[0058] If the electronic expansion valve opening increases, its throttling effect decreases, preventing the refrigerant temperature from dropping too low. When the refrigerant circulates to the evaporator, it still retains a certain temperature. This heat energy can raise the evaporator temperature and melt the thin frost on its surface, slowing down the frosting process. Conversely, if the electronic expansion valve opening decreases, its throttling effect increases, leading to increased heat release from the refrigerant in the condenser and heat absorption by the evaporator. This improves the air conditioner's performance, compensating for any decrease in performance caused by increasing the electronic expansion valve opening and preventing large temperature fluctuations in the indoor environment. Therefore, based on the target control pulse signal, the electronic expansion valve can continuously, periodically, and at a relatively high frequency and efficiency increase the opening degree (defrosting) and decrease the opening degree (retrospective operation effect). During the process of the electronic expansion valve periodically increasing and then decreasing the opening degree, that is, during the process of the electronic expansion valve executing the target control pulse signal, the air conditioner pulses defrosts and then retrospectively reviews the air conditioner's operating effect. While reducing indoor temperature fluctuations, it slows down the frosting speed of the evaporator, which can improve the comfort of the air conditioner and delay the time for the air conditioner to perform reversing defrosting operation.

[0059] For example, refer to Figure 4The electronic expansion valve adjusts its opening based on a high voltage value to a greater degree than it adjusts based on a low voltage value. If, at time t1, the target control pulse signal switches from a low level to a high level, controlling the voltage value of the electronic expansion valve to change from a low voltage value to a high voltage value, the electronic expansion valve will increase from its initial opening to the target opening, reducing the throttling effect and enabling the defrosting of thin frost to slow down the frosting speed. If, at time t2, the target control pulse signal switches from a high level back to a low level, controlling the voltage value of the electronic expansion valve to change from a high voltage value to a low voltage value, the electronic expansion valve will decrease from the target opening to the initial opening, thus restoring the throttling effect, improving the air conditioner's operating efficiency, and preventing large fluctuations in indoor ambient temperature.

[0060] Optionally, within one signal cycle, the target control pulse signal exists in both high and low levels. After the electronic expansion valve increases its opening, it may not immediately decrease the opening but instead operate at the increased opening for a period of time. Alternatively, after decreasing the opening, it may not immediately increase the opening but instead continue operating at the decreased opening for a period of time. This requires the target control pulse signal to be continuously in a high-level or low-level state for a certain period of time within one signal cycle. In this way, the electronic expansion valve can maintain operation at the target opening for a period of time after increasing from the initial opening to the target opening, and / or it can maintain operation at the initial opening for a period of time after decreasing from the target opening to the initial opening. The maintenance time can be determined based on specific defrosting and air conditioning operation requirements to achieve a better comfort effect.

[0061] Step S30: If the electronic expansion valve completes the target control pulse signal, it controls the four-way valve of the air conditioner to switch and perform the defrosting operation.

[0062] In this embodiment, if the electronic expansion valve completes the target control pulse signal, it indicates that the air conditioner has repeatedly performed the operation of increasing the opening of the electronic expansion valve multiple times to defrost and slow down the frosting speed, and then increasing the electronic expansion valve again to review the air conditioner's operating effect. This allows for a better operating effect to delay the frosting effect after the evaporator temperature meets the frosting conditions, resulting in a longer time interval between the evaporator temperature meeting the frosting conditions and the execution of the defrosting operation. This extends the execution cycle between defrosting operations. Therefore, if the electronic expansion valve completes the target control pulse signal, the operation of completing the target control pulse signal... After the corresponding control action, the four-way valve of the air conditioner can be switched. This allows the high-temperature, high-pressure heat exchanger output by the compressor to flow to the evaporator, where the temperature previously met the frosting conditions. Heat is released in the evaporator, which melts the thick frost layer on the evaporator surface, quickly defrosting. After the defrosting operation is completed, the four-way valve of the air conditioner is switched back to the initial connected state, allowing the evaporator to continue absorbing heat and operate with the previous temperature control effect. Because the frost on the evaporator surface is removed during the defrosting operation, the temperature can be controlled with better operating effect, providing a better heat control effect.

[0063] In the technical solution disclosed in this embodiment, the evaporator temperature of the air conditioner is obtained. If the evaporator temperature meets the frosting conditions, a target control pulse signal is sent to the electronic expansion valve of the air conditioner to control the electronic expansion valve to adjust its opening based on the voltage value of the target control pulse signal. If the electronic expansion valve completes the execution of the target control pulse signal, the four-way valve of the air conditioner is controlled to switch directions to perform a defrosting operation. The pulse signal is periodic, with both high and low levels within its signal period. This means the control pulse signal will periodically exhibit high voltage values ​​followed by low voltage values. The electronic expansion valve adjusts its opening based on the voltage value of the target control pulse signal, allowing for more accurate and adaptive periodic adjustments to the electronic expansion valve according to the air conditioner and its operating parameters. The opening is first increased, then returns to its initial opening before the initial increase. Thus, in the early stages after the evaporator temperature meets the frosting conditions, the periodic increase and decrease of the electronic expansion valve opening reduces fluctuations in indoor ambient temperature, slows down the frosting process, and delays the time it takes for the air conditioner to perform the defrosting operation, avoiding frequent fluctuations in indoor temperature. Therefore, it can improve the comfort of air conditioning. Furthermore, because the electronic expansion valve is controlled by sending pulse signals, its increase and decrease can be precisely and quickly controlled, thereby improving the air conditioner's control over defrosting and operating performance, further enhancing comfort.

[0064] Furthermore, after sending the target control pulse signal to the electronic expansion valve of the air conditioner, the method further includes:

[0065] Obtain the number of times the control pulse signal was sent within a historical time period;

[0066] If the number of transmissions is greater than or equal to a preset threshold, then if the electronic expansion valve completes the execution of the target control pulse signal, then the four-way valve of the air conditioner is controlled to switch to perform a defrosting operation.

[0067] If the number of transmissions is less than a preset threshold, a target frequency reduction value is determined based on the number of transmissions and a preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value.

[0068] In this embodiment, the number of times the air conditioner sends control pulse signals to the electronic expansion valve within a historical period is obtained. The historical period can be the most recent preset period. The more times the control pulse signals are sent within the historical period, the more times the evaporator temperature of the air conditioner meets the frosting conditions within the historical period, and the more repeated frosting occurs. This indicates that the operating environment of the evaporator is more severe, the external frosting speed is faster, and the frost thickness of the air conditioner is greater after the electronic expansion valve executes the target control pulse signal. Therefore, when the number of transmissions is greater than or equal to a preset threshold, after the electronic expansion valve executes the target control pulse signal, the four-way valve of the air conditioner is controlled to switch to perform a defrosting operation, thereby using a higher intensity defrosting operation to achieve a better defrosting effect and restore the normal operation of the air conditioner more quickly. When the number of transmissions is less than the preset threshold, it indicates that the frost formation speed on the outside of the evaporator is faster. After the electronic expansion valve executes the target control pulse signal, the frost thickness of the air conditioner is not too thick. Therefore, the preset frequency reduction table can be consulted to determine the target frequency reduction value corresponding to the number of transmissions. The preset frequency reduction table is a pre-set correspondence between the number of transmissions and the frequency reduction value. The larger the number of transmissions, the larger the frequency reduction value. Based on the target frequency reduction value corresponding to the current number of transmissions, the air conditioner is controlled to reduce the compressor frequency. The compressor frequency is precisely reduced based on the number of transmissions. Thus, when the electronic expansion valve executes the target control pulse signal, it can run at the reduced compressor frequency. After the compressor frequency is reduced, the heat absorption effect of the evaporator can be reduced. Combined with the defrosting effect generated by the electronic expansion valve executing the target control pulse signal, the evaporator temperature can be raised to the preset temperature that does not meet the frost formation conditions.

[0069] Optionally, reducing the compressor frequency can also affect the air conditioner's operating performance. Therefore, before controlling the air conditioner to reduce the compressor frequency by determining the target frequency reduction value based on the number of transmissions and the preset frequency reduction table, the current compressor frequency can be obtained. If the compressor frequency is less than the preset frequency, it indicates that the compressor frequency should not be reduced further to maintain the minimum operating performance of the air conditioner, and step S30 is executed again. If the compressor frequency is greater than or equal to the preset frequency, the target frequency reduction value is determined based on the number of transmissions and the preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value. Optionally, the target frequency reduction value is determined based on the number of transmissions and the preset frequency reduction table, and an initial target compressor frequency is determined based on the target frequency reduction value and the compressor frequency. If the initial target compressor frequency is greater than the preset frequency, the compressor frequency is controlled to be reduced to the initial target compressor frequency. If the initial target compressor frequency is less than or equal to the preset frequency, the compressor frequency is controlled to be reduced to the preset frequency.

[0070] By controlling the number of times the control pulse signal is sent within a historical period, the system selects whether to perform a reversing defrosting operation with better defrosting effect after the electronic expansion valve completes the target control pulse signal, and simultaneously reduces the compressor frequency to increase the evaporator temperature to prevent frost formation while the electronic expansion valve is executing the target control pulse signal. This achieves a better effect in avoiding frost formation and thus improves the comfort of the air conditioner.

[0071] Further, before determining the target frequency reduction value based on the number of transmissions and the preset frequency reduction table, and before controlling the air conditioner to reduce the compressor frequency based on the target frequency reduction value, the method further includes:

[0072] Obtain the historical transmission time of the most recent historical control pulse signal;

[0073] Based on the historical transmission time, determine the transmission interval between the most recent historical control pulse signal and the target control pulse signal;

[0074] If the transmission interval is less than a preset time, then the target frequency reduction value is determined based on the number of transmissions and a preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value.

[0075] In this embodiment, the historical transmission time of the most recent historical control pulse signal can also be obtained. The historical control pulse signal is the control pulse signal transmitted before the target control pulse signal is transmitted. The most recent historical control pulse signal is the previous control pulse signal transmitted before the target control pulse signal, and is also the latest historical control pulse signal. By obtaining the historical transmission time of this most recent historical control pulse signal and determining the transmission interval between the most recent historical control pulse signal and the target control pulse signal based on the historical transmission time and the transmission time of the target control pulse signal, this transmission interval can also characterize the time interval between the two most recent instances where the air conditioner met the frosting conditions. The smaller the transmission interval, the more frequent the frosting and the faster the evaporator frosts. Therefore, if the transmission interval is less than a preset time, a target frequency reduction value is determined based on the number of transmissions and a preset frequency reduction table. The air conditioner is then controlled to reduce the compressor frequency based on the target frequency reduction value. This reduces the compressor frequency and, by controlling the opening of the electronic expansion valve through the control pulse signal, better slows down the frosting speed. Otherwise, there is no need to reduce the compressor frequency; instead, the frosting speed is slowed down by controlling the opening of the electronic expansion valve through the control pulse signal to avoid ineffectively slowing down the frosting speed and excessively affecting the air conditioner's operating performance, thus further improving the comfort of the air conditioner.

[0076] Furthermore, after sending the target control pulse signal to the electronic expansion valve of the air conditioner, the method further includes:

[0077] The target control pulse signal is input into a preset signal modulation module to obtain a wind speed control pulse signal;

[0078] The air conditioner sends a wind speed control pulse signal to the indoor fan, and controls the indoor fan to adjust its wind speed based on the voltage value of the wind speed control pulse signal.

[0079] In this embodiment, the indoor and outdoor unit fan speeds of the air conditioner can also be controlled by pulse control, in conjunction with the pulse control of the electronic expansion valve, to better delay the frosting process and maintain operational efficiency. Since the electronic expansion valve opening and the indoor fan speed are two-dimensional parameters, control requires two control pulse signals with the same period and duty cycle but different voltage values ​​to control the electronic expansion valve opening and the indoor fan speed respectively. The target control pulse signal is input into a preset signal modulation module, which is a model adjustment module corresponding to the indoor fan. Inputting the target control pulse signal into the preset signal modulation module yields a fan speed control pulse signal with the same period and duty cycle as the target control pulse signal, but in the opposite direction. A fan speed control pulse signal is sent to the indoor fan of the air conditioner. The indoor fan speed is adjusted based on the voltage value of the fan speed control pulse signal. When the electronic expansion valve increases its opening, the indoor fan speed is controlled to decrease. When the electronic expansion valve increases and then decreases its opening, the indoor fan speed is controlled to increase. This allows the adjustment time of the electronic expansion valve to be synchronized with the periodic decrease and increase of the indoor fan speed. The decrease in indoor fan speed reduces the heat release effect in the condenser and increases the temperature of the refrigerant circulating to the evaporator. Combined with the increase in the opening of the electronic expansion valve, this further slows down the frosting speed of the air conditioner. The decrease and then increase in indoor fan speed restores the heat release effect in the condenser. Combined with the increase and then decrease in the opening of the electronic expansion valve, this further restores the air conditioner's operating effect and improves the comfort of the air conditioner.

[0080] Optionally, after sending a target control pulse signal to the electronic expansion valve of the air conditioner, the air conditioner's outdoor fan speed can also be increased to its maximum value, thereby improving the circulation of the outdoor fan speed, improving the heat exchange effect of the air conditioner, and thus improving the operating effect of the air conditioner. In general, the evaporator in the outdoor unit frosts when the air conditioner is heating. By increasing the outdoor fan speed to its maximum value, the activity of water molecules inside the outdoor unit can be increased, reducing the time that water molecules stay on its surface. This can improve the effect of delaying the frosting speed. Furthermore, the water molecules that fuse with the frost due to the delayed frosting speed treat the evaporator surface, further preventing re-frost adjustment in the short term, extending the defrosting cycle, and further improving the comfort of the air conditioner.

[0081] Furthermore, after obtaining the evaporator temperature of the air conditioner, the method further includes:

[0082] After obtaining the evaporator temperature of the air conditioner, the method further includes:

[0083] The ambient temperature and humidity of the evaporator are obtained;

[0084] The frosting temperature threshold is determined based on the ambient temperature and the ambient humidity.

[0085] In this embodiment, if the evaporator temperature is lower than the frosting temperature threshold, it is determined that the evaporator temperature meets the frosting conditions. In this embodiment, when the evaporator temperature is lower than the preset temperature, it can be determined that the evaporator temperature meets the frosting conditions, so the setting of the preset temperature is crucial. Frosting occurs when water vapor in the air may condense into water droplets or ice on the evaporator. Therefore, frosting is related to both ambient temperature and humidity. The ambient temperature and humidity of the air conditioner evaporator are obtained. Generally, considering the frosting situation, the evaporator refers to the heat exchanger of the outdoor unit. Therefore, the outdoor ambient temperature of the air conditioner can also be obtained as the evaporator ambient temperature T, and the outdoor ambient humidity of the air conditioner can be obtained as the evaporator ambient humidity RH. Based on the following formula, the temperature at which water vapor in the air begins to condense into water droplets is calculated as the frosting temperature threshold. This frosting temperature threshold Td can be set as the preset temperature for determining whether the evaporation temperature meets the frosting conditions.

[0086]

[0087] If the evaporator temperature is lower than the frosting temperature threshold, it can be determined that the evaporator temperature meets the frosting conditions, and then a target control pulse signal is sent to the electronic expansion valve of the air conditioner.

[0088] In this embodiment, the frosting temperature threshold is determined by the ambient temperature and humidity of the evaporator, thereby accurately determining whether the evaporator temperature meets the frosting conditions. This allows for accurate defrosting intervention, avoids incorrect defrosting, and improves the comfort of the air conditioner.

[0089] Optionally, refer to Figure 2 Based on any of the above embodiments, in another embodiment of the air conditioner defrosting control method of the present invention, before step S20, the method further includes:

[0090] Step S40: Obtain the operating opening degree of the air conditioning electronic expansion valve;

[0091] In this embodiment, the current operating opening of the electronic expansion valve of the air conditioner is obtained. This operating opening is the opening of the electronic expansion valve controlled during normal operation of the air conditioner. This operating opening generally needs to be obtained in real time because the operating opening of the electronic expansion valve may vary depending on the air conditioner control scheme.

[0092] Step S50: Set a low-level value according to the operating opening degree, and set a high-level value according to the maximum opening degree of the electronic expansion valve;

[0093] In this embodiment, after the evaporator temperature meets the frosting conditions, the opening of the air conditioner's electronic expansion valve increases and then decreases to restore the air conditioner's operating effect. Therefore, it is necessary to restore the electronic expansion valve opening to the operating opening, or a position slightly smaller than the operating opening. Thus, the first degree of decrease in the electronic expansion valve opening after increasing can be calculated based on the operating opening and the preset floating opening. A low-level value of the target control pulse signal is set based on this first degree. When controlling the electronic expansion valve based on this low-level value, it can be adjusted to the first degree. Increasing the opening of the air conditioner's electronic expansion valve is to slow down the frosting speed. The larger the electronic expansion valve opening, the greater the throttling effect, and thus the better the effect of slowing down the frosting speed. Therefore, the maximum opening of the electronic expansion valve can be used as the second opening, or an opening greater than the operating opening but less than the maximum opening can be used as the second opening. This second opening is also the target opening that the electronic expansion valve needs to increase. A high-level value of the target control pulse signal is set based on this second opening. When controlling the electronic expansion valve based on this high-level value, it can be adjusted to the second opening.

[0094] Step S60: Generate the target control pulse signal based on the low level value and the high level value.

[0095] In this embodiment, a high-level value is a higher voltage value in the control pulse signal, and a low-level value is a lower voltage value in the control pulse signal. A target control pulse signal is generated based on the low-level value and the high-level value, and then a real-time target control pulse signal is generated based on the current operating parameters of the air conditioner. For example, the electronic expansion valve can increase its opening from the operating opening to the maximum opening based on the high-level value of the target control pulse signal, and decrease its opening from the maximum opening to the operating opening based on the low-level value of the target control pulse signal.

[0096] In the technical solution disclosed in this embodiment, the low-level and high-level values ​​of the target control pulse signal are set according to the operating opening degree of the air conditioning electronic expansion valve, thereby accurately improving the delay of frosting effect and the retention of operating effect based on the target control pulse signal, and further improving the comfort of the air conditioner.

[0097] Further, generating the target control pulse signal based on the low-level value and the high-level value includes:

[0098] Obtain the transmission frequency of the control pulse signal and the indoor ambient temperature within the historical time period;

[0099] Query the preset lookup table to determine the anti-frost duration corresponding to the transmission frequency, and determine the buffer duration corresponding to the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner;

[0100] The duty cycle is set according to the anti-frost duration and the buffer duration;

[0101] The target control pulse signal is generated based on the low level value, the high level value, and the duty cycle.

[0102] In this embodiment, the transmission frequency of the control pulse signal within a historical time period is obtained. This transmission frequency can be determined by the number of times the control pulse signal is transmitted within the historical time period. The higher the transmission frequency, the greater the severity of frost formation. Therefore, after the electronic expansion valve executes the target control pulse signal, the duration for which it maintains the increased opening is longer. This anti-frost time refers to the theoretical duration for which the electronic expansion valve operates at the increased opening after the initial increase. A preset lookup table is consulted to determine the anti-frost time corresponding to the transmission frequency. The preset lookup table shows the correspondence between preset transmission frequencies and anti-frost times; the higher the transmission frequency, the longer the anti-frost time.

[0103] Indoor ambient temperature is the target temperature for air conditioning. The temperature difference between the indoor ambient temperature and the air conditioner's set temperature characterizes the air conditioner's operating effect. The larger the temperature difference, the worse the operating effect. Correspondingly, the electronic expansion valve needs a longer operating time to reduce its opening after increasing it. This buffer time refers to the theoretically required operating time for the electronic expansion valve to reduce its opening after increasing it. Refer to the preset lookup table to determine the buffer time corresponding to the temperature difference between the indoor ambient temperature and the air conditioner's set temperature; the larger the temperature difference, the longer the buffer time.

[0104] The duty cycle of the target control pulse signal can be determined by the ratio between the anti-frost duration and the buffer duration. The signal period of the target control pulse signal can be a preset signal period or determined by the sum of the anti-frost duration and the buffer duration. Optionally, if the sum of the anti-frost duration and the buffer duration is greater than the maximum preset signal period, then the maximum preset signal period needs to be set as the signal period of the target control pulse signal. If the sum of the anti-frost duration and the buffer duration is less than or equal to the maximum preset signal period, then the sum of the anti-frost duration and the buffer duration is set as the signal period of the target control pulse signal. Furthermore, the time distribution of the high-level and low-level states can be set according to the signal period and duty cycle of the target control pulse signal. Then, by combining the low-level and high-level values, as well as the preset signal length or the preset number of pulses, a complete target control pulse signal is generated.

[0105] This method determines the anti-frost duration based on the transmission frequency of control pulse signals within a historical time period, and determines the buffer duration based on the temperature difference between the indoor ambient temperature and the air conditioner's set temperature. Based on the buffer duration and anti-frost duration, a target control pulse signal can be set. Combining the low and high level values ​​of the previously set target control pulse signal, a target control pulse signal that better matches the current operation and frosting conditions of the air conditioner is generated. This allows for more accurate improvement in delaying frosting and preserving operational performance based on the target control pulse signal, thereby further enhancing the comfort of the air conditioner.

[0106] This embodiment also provides an air conditioner defrosting control device, which can be integrated into the air conditioner. For example, as... Figure 5 As shown, the air conditioner defrosting control device may include:

[0107] The acquisition module 1001 is used to acquire the evaporator temperature of the air conditioner;

[0108] The first control module 1002 is used to send a target control pulse signal to the electronic expansion valve of the air conditioner if the evaporator temperature meets the frosting conditions, and control the electronic expansion valve to adjust the opening degree based on the voltage value of the target control pulse signal.

[0109] The second control module 1003 is used to control the four-way valve of the air conditioner to switch direction and perform defrosting operation if the electronic expansion valve completes the target control pulse signal.

[0110] Optionally, the first control module 1002 is also used for:

[0111] Obtain the number of times the control pulse signal was sent within a historical time period;

[0112] If the number of transmissions is greater than or equal to a preset threshold, then if the electronic expansion valve completes the execution of the target control pulse signal, then the four-way valve of the air conditioner is controlled to switch to perform a defrosting operation.

[0113] If the number of transmissions is less than a preset threshold, a target frequency reduction value is determined based on the number of transmissions and a preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value.

[0114] Optionally, the first control module 1002 is also used for:

[0115] Obtain the historical transmission time of the most recent historical control pulse signal;

[0116] Based on the historical transmission time, determine the transmission interval between the most recent historical control pulse signal and the target control pulse signal;

[0117] If the transmission interval is less than a preset time, then the target frequency reduction value is determined based on the number of transmissions and a preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value.

[0118] Optionally, the first control module 1002 is also used for:

[0119] The target control pulse signal is input into a preset signal modulation module to obtain a wind speed control pulse signal;

[0120] The air conditioner sends a wind speed control pulse signal to the indoor fan, and controls the indoor fan to adjust its wind speed based on the voltage value of the wind speed control pulse signal.

[0121] Optionally, the first control module 1002 is also used for:

[0122] Obtain the operating opening degree of the air conditioning electronic expansion valve;

[0123] A low-level value is set according to the operating opening degree, and a high-level value is set according to the maximum opening degree of the electronic expansion valve;

[0124] The target control pulse signal is generated based on the low level value and the high level value.

[0125] Optionally, the first control module 1002 is also used for:

[0126] Obtain the transmission frequency of the control pulse signal and the indoor ambient temperature within the historical time period;

[0127] Query the preset lookup table to determine the anti-frost duration corresponding to the transmission frequency, and determine the buffer duration corresponding to the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner;

[0128] The duty cycle is set according to the anti-frost duration and the buffer duration;

[0129] The target control pulse signal is generated based on the low level value, the high level value, and the duty cycle.

[0130] Optionally, the acquisition module 1001 is also used for:

[0131] The ambient temperature and humidity of the evaporator are obtained;

[0132] The frosting temperature threshold is determined based on the ambient temperature and the ambient humidity.

[0133] If the evaporator temperature is lower than the frosting temperature threshold, then the evaporator temperature is determined to meet the frosting conditions.

[0134] In this embodiment, the evaporator temperature of the air conditioner is acquired. If the evaporator temperature meets the frosting conditions, a target control pulse signal is sent to the electronic expansion valve of the air conditioner. The electronic expansion valve adjusts its opening based on the voltage value of the target control pulse signal. After the electronic expansion valve completes the execution of the target control pulse signal, the four-way valve of the air conditioner is switched to perform a defrosting operation. The pulse signal is periodic, exhibiting both high and low voltage states within its signal period. This causes the control pulse signal to periodically show high and low voltage values. The electronic expansion valve adjusts its opening based on the voltage value of the target control pulse signal, periodically increasing the opening and then returning to its initial opening before the increase. Thus, in the early stages after the evaporator temperature meets the frosting conditions, the periodic increase and decrease of the electronic expansion valve opening reduces fluctuations in indoor ambient temperature, slows down the frosting process, and delays the time it takes for the air conditioner to perform the defrosting operation, avoiding frequent fluctuations in indoor temperature. Therefore, the comfort of the air conditioner can be improved.

[0135] like Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of the present invention. The air conditioner 1100 includes a processor 1101 with one or more processing cores, a memory 1102 with one or more computer-readable storage media, and a computer program stored on the memory 1102 and executable on the processor. The processor 1101 and the memory 1102 are electrically connected. Those skilled in the art will understand that the air conditioner structure shown in the figure does not constitute a limitation on the air conditioner, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0136] The processor 1101 is the control center of the air conditioner 1100. It connects various parts of the air conditioner 1100 via various interfaces and lines. By running or loading software programs and / or units stored in the memory 1102, and by calling data stored in the memory 1102, it executes various functions of the air conditioner 1100 and processes data, thereby performing overall monitoring of the air conditioner 1100. The processor 1101 can be a CPU, GPU, network processor (NP), etc., and can implement or execute the methods, steps, and logic diagrams disclosed in the embodiments of this invention.

[0137] In this embodiment of the invention, the processor 1101 in the air conditioner 1100 loads the instructions corresponding to the processes of one or more application programs into the memory 1102 according to the following steps, and the processor 1101 runs the application programs stored in the memory 1102 to realize various functions, such as:

[0138] Obtain the evaporator temperature of the air conditioner;

[0139] If the evaporator temperature meets the frosting conditions, a target control pulse signal is sent to the electronic expansion valve of the air conditioner to control the electronic expansion valve to adjust its opening based on the voltage value of the target control pulse signal.

[0140] If the electronic expansion valve completes the target control pulse signal, it controls the four-way valve of the air conditioner to switch direction and perform defrosting operation.

[0141] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0142] Optional, such as Figure 6 As shown, the air conditioner 1100 also includes: a touch screen display 1103, a radio frequency circuit 1104, an audio circuit 1105, an input unit 1106, and a power supply 1107. The processor 1101 is electrically connected to the touch screen display 1103, the radio frequency circuit 1104, the audio circuit 1105, the input unit 1106, and the power supply 1107. Those skilled in the art will understand that... Figure 6 The air conditioning structure shown does not constitute a limitation on the air conditioning system and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0143] The touch display screen 1103 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. The touch display screen 1103 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various GUIs of the air conditioner. These GUIs can be composed of graphics, text, icons, video, and any combination thereof. Optionally, the display panel can be configured using a liquid crystal display (LCD), organic light-emitting diode (OLED), or other similar technologies. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), and generate corresponding operation commands, which then execute the corresponding program. Optionally, the touch panel may include a touch detection device and a touch controller. The touch detection device detects the user's touch location and the signal generated by the touch operation, transmitting the signal to the touch controller. The touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 1101. It can also receive and execute commands from the processor 1101. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 1101 to determine the type of touch event. Subsequently, the processor 1101 provides corresponding visual output on the display panel based on the type of touch event. In this embodiment, the touch panel and the display panel can be integrated into the touch display screen 1103 to achieve input and output functions. However, in some embodiments, the touch panel and the touch display screen 1103 can be used as two independent components to achieve input and output functions. That is, the touch display screen 1103 can also be used as part of the input unit 1106 to achieve input functions.

[0144] The radio frequency circuit 1104 can be used to transmit and receive radio frequency signals to establish wireless communication with network devices or other air conditioners, and to transmit and receive signals with network devices or other air conditioners.

[0145] Audio circuit 1105 can be used to provide an audio interface between the user and the air conditioner via a speaker and a microphone. Audio circuit 1105 can convert received audio data into electrical signals and transmit them to the speaker, where the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuit 1105, converted back into audio data, and then processed by processor 1101 before being transmitted via radio frequency circuit 1104 to, for example, another air conditioner, or output to memory 1102 for further processing. Audio circuit 1105 may also include an earphone jack to provide communication between external headphones and the air conditioner.

[0146] The input unit 1106 can be used to receive input numbers, characters, or user characteristic information (such as fingerprints, iris, facial information, etc.), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.

[0147] Power supply 1107 is used to supply power to the various components of air conditioner 1100. Optionally, power supply 1107 can be logically connected to processor 1101 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. Power supply 1107 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0148] although Figure 6 As not shown in the diagram, the air conditioner 1100 may also include a camera, sensor, wireless fidelity module, Bluetooth module, etc., which will not be described in detail here.

[0149] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0150] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0151] Therefore, embodiments of the present invention provide a computer-readable storage medium storing a plurality of computer programs, which can be loaded by a processor to execute any of the air conditioning defrosting control methods provided in the embodiments of the present invention. The computer program can execute the following steps of the air conditioning defrosting control method:

[0152] Obtain the evaporator temperature of the air conditioner;

[0153] If the evaporator temperature meets the frosting conditions, a target control pulse signal is sent to the electronic expansion valve of the air conditioner to control the electronic expansion valve to adjust its opening based on the voltage value of the target control pulse signal.

[0154] If the electronic expansion valve completes the target control pulse signal, it controls the four-way valve of the air conditioner to switch direction and perform defrosting operation.

[0155] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0156] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0157] Since the computer program stored in the computer-readable storage medium can execute any of the air conditioning defrosting control methods provided in the embodiments of the present invention, the beneficial effects that any of the air conditioning defrosting control methods provided in the embodiments of the present invention can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0158] In the above embodiments of the air conditioner defrosting control device, computer-readable storage medium, air conditioner, and computer program product, the descriptions of each embodiment have different focuses. For parts not described in detail in a particular embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes and beneficial effects of the air conditioner defrosting control device, computer-readable storage medium, computer program product, air conditioner, and their corresponding units described above can be referred to the description of the air conditioner defrosting control method in the above embodiments, and will not be repeated here.

[0159] The foregoing has provided a detailed description of an air conditioner defrosting control method, an air conditioner defrosting control device, an air conditioner, a computer-readable storage medium, and a computer program product provided by embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A defrosting control method for an air conditioner, characterized in that, The air conditioning defrosting control method includes: Obtain the evaporator temperature of the air conditioner; If the evaporator temperature meets the frosting conditions, a target control pulse signal is sent to the electronic expansion valve of the air conditioner to control the electronic expansion valve to adjust its opening based on the voltage value of the target control pulse signal. Obtain the number of times the control pulse signal was sent within a historical time period; If the number of transmissions is greater than or equal to a preset threshold, then if the electronic expansion valve completes the execution of the target control pulse signal, then the four-way valve of the air conditioner is controlled to switch to perform a defrosting operation. If the number of transmissions is less than a preset threshold, a target frequency reduction value is determined based on the number of transmissions and a preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value.

2. The air conditioning defrosting control method as described in claim 1, characterized in that, Before determining the target frequency reduction value based on the number of transmissions and a preset frequency reduction table, and before controlling the air conditioner to reduce the compressor frequency based on the target frequency reduction value, the method further includes: Obtain the historical transmission time of the most recent historical control pulse signal; Based on the historical transmission time, determine the transmission interval between the most recent historical control pulse signal and the target control pulse signal; If the transmission interval is less than a preset time, then the target frequency reduction value is determined based on the number of transmissions and a preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value.

3. The air conditioning defrosting control method as described in claim 1, characterized in that, After sending the target control pulse signal to the electronic expansion valve of the air conditioner, the method further includes: The target control pulse signal is input into a preset signal modulation module to obtain a wind speed control pulse signal; The air conditioner sends a wind speed control pulse signal to the indoor fan, and controls the indoor fan to adjust its wind speed based on the voltage value of the wind speed control pulse signal.

4. The air conditioning defrosting control method as described in claim 1, characterized in that, Before sending the target control pulse signal to the electronic expansion valve of the air conditioner if the evaporator temperature meets the frosting conditions, the method further includes: Obtain the operating opening degree of the air conditioning electronic expansion valve; A low-level value is set according to the operating opening degree, and a high-level value is set according to the maximum opening degree of the electronic expansion valve; The target control pulse signal is generated based on the low level value and the high level value.

5. The air conditioning defrosting control method as described in claim 4, characterized in that, The step of generating the target control pulse signal based on the low level value and the high level value includes: Obtain the transmission frequency of the control pulse signal and the indoor ambient temperature within the historical time period; Query the preset lookup table to determine the anti-frost duration corresponding to the transmission frequency, and determine the buffer duration corresponding to the temperature difference between the indoor ambient temperature and the set temperature of the air conditioner; The duty cycle is set according to the anti-frost duration and the buffer duration; The target control pulse signal is generated based on the low level value, the high level value, and the duty cycle.

6. The air conditioning defrosting control method according to any one of claims 1-5, characterized in that, After obtaining the evaporator temperature of the air conditioner, the method further includes: The ambient temperature and humidity of the evaporator are obtained; The frosting temperature threshold is determined based on the ambient temperature and the ambient humidity. If the evaporator temperature is lower than the frosting temperature threshold, then the evaporator temperature is determined to meet the frosting conditions.

7. An air conditioner defrosting control device, characterized in that, The air conditioning defrosting control device includes: An acquisition module is used to acquire the evaporator temperature of the air conditioner; The first control module is configured to send a target control pulse signal to the electronic expansion valve of the air conditioner if the evaporator temperature meets the frosting conditions, and control the electronic expansion valve to adjust its opening based on the voltage value of the target control pulse signal; and to acquire the number of times the control pulse signal is sent within a historical period; if the number of times sent is less than a preset threshold, a target frequency reduction value is determined based on the number of times sent and a preset frequency reduction table, and the air conditioner is controlled to reduce the compressor frequency based on the target frequency reduction value; if the number of times sent is greater than or equal to the preset threshold, the second control module is invoked. The second control module is used to control the four-way valve of the air conditioner to switch direction and perform defrosting operation if the electronic expansion valve completes the execution of the target control pulse signal.

8. An air conditioner, characterized in that, It includes a processor and a memory, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of any one of the air conditioning defrosting control methods of claims 1-7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a computer program that, when run on an electronic device, causes the electronic device to perform the steps of any of the air conditioning defrosting control methods of claims 1-6.

Images