A control method and device of an air conditioner, the air conditioner, and a storage medium

Abstract

The application discloses a control method and device of an air conditioner, the air conditioner and a storage medium, and relates to the technical field of air conditioners. The method comprises the following steps: if the air conditioner starts heating for the first time in an ultralow-temperature environment, determining the initial opening degree of an electronic expansion valve in the defrosting period of the next heating period according to the running time of the defrosting period and the initial opening degree of the electronic expansion valve in the current heating period after the current heating period ends, and controlling the opening degree of the electronic expansion valve in the defrosting period of the next heating period according to the initial opening degree of the electronic expansion valve in the defrosting period of the next heating period. According to the scheme, the initial opening degree of the electronic expansion valve in the next defrosting period is determined according to the running time of the defrosting period and the initial opening degree of the electronic expansion valve when the air conditioner heats in an ultralow-temperature environment, so that the running time of the next defrosting period is adjusted, the problem that the running time of the next heating period is excessively adjusted due to the excessively long or short time of the defrosting period is solved, and the overall capacity of the air conditioner under the frosting working condition is improved.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to an air conditioning control method, device, air conditioner and storage medium, and more particularly to an air conditioning defrosting mode control method, device, air conditioner and storage medium for controlling the opening of an electronic expansion valve. Background Technology

[0002] When an air conditioner is heating at low temperatures, to maximize the performance of the air conditioning system, the defrosting time is usually used to determine the operating time of the next heating period. If the defrosting time is long, the operating time of the next heating period is reduced; if the defrosting time is short, the operating time of the next heating period is increased. Therefore, if defrosting is too fast, the defrosting time will be too short, resulting in an excessively long heating operating time in the next heating period. This causes more severe frost buildup on the outdoor unit, significantly reducing the air conditioner's capacity and overall system performance.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide an air conditioner control method, device, air conditioner, and storage medium to solve the problem in the prior art where, during low-temperature heating, excessively rapid defrosting leads to a short defrosting time, resulting in an excessively long heating operation time for the next heating cycle. This causes more severe frost buildup on the outdoor unit, significantly reducing the air conditioner's capacity and overall performance. The invention achieves this by combining the air conditioner's operating time during the current defrosting mode and the opening degree of the electronic expansion valve during low-temperature heating to determine the initial opening degree of the electronic expansion valve for the next defrosting mode. This adjusts the operating time of the next defrosting mode, thereby adjusting the corresponding heating time, preventing excessive frost buildup on the outdoor unit due to prolonged heating time, and improving the overall performance of the air conditioner.

[0005] This invention provides a control method for an air conditioner, the air conditioner having a heating mode and a defrosting mode; the air conditioner is capable of heating in ultra-low temperature environments; the heating cycle of the air conditioner in ultra-low temperature environments includes a heating period and a defrosting period, the air conditioner operates in heating mode during the heating period, and the air conditioner operates in defrosting mode during the defrosting period; the method includes: determining whether the air conditioner starts heating for the first time in ultra-low temperature environments; if it is determined that the air conditioner starts heating for the first time in ultra-low temperature environments, then after the end of the current heating cycle, acquiring the operating time of the defrosting period and the initial opening of the electronic expansion valve in the current heating cycle; based on the operating time of the defrosting period and the initial opening of the electronic expansion valve in the current heating cycle, determining the initial opening of the electronic expansion valve in the defrosting period of the next heating cycle; in the next heating cycle, controlling the opening of the electronic expansion valve in the defrosting period of the next heating cycle based on the initial opening of the electronic expansion valve in the defrosting period of the next heating cycle.

[0006] In some embodiments, determining whether the air conditioner starts heating for the first time in an ultra-low temperature environment includes: if the air conditioner starts heating after being powered on for the first time in an ultra-low temperature environment, and / or starts heating after the air conditioner's compressor has been off for two hours or more in an ultra-low temperature environment, then the air conditioner is determined to have started heating for the first time in an ultra-low temperature environment; based on the running time of the defrost period in the current heating cycle and the initial opening of the electronic expansion valve, determining the initial opening of the electronic expansion valve in the defrost period of the next heating cycle includes: determining the interval in which the running time is located based on the running time of the defrost period in the current heating cycle; and determining the initial opening of the electronic expansion valve in the defrost period of the next heating cycle based on the interval in which the running time is located and the opening of the electronic expansion valve.

[0007] In some implementations, the interval of the operating time is determined based on the operating time during the defrosting period in the current heating cycle, including: if the operating time is less than or equal to a first preset time, the operating time is determined to be in a first interval; if the operating time is greater than the first preset time and less than or equal to a second preset time, the operating time is determined to be in a second interval; if the operating time is greater than the second preset time and less than or equal to a third preset time, the operating time is determined to be in a third interval; if the operating time is greater than the third preset time and less than or equal to a fourth preset time, the operating time is determined to be in a fourth interval; if the operating time is greater than the fourth preset time and less than or equal to a fifth preset time, the operating time is determined to be in a fifth interval; and if the operating time is greater than the fifth preset time, the operating time is determined to be in a sixth interval.

[0008] In some embodiments, the interval in which the operating time falls includes at least one of a first interval, a second interval, a third interval, a fourth interval, a fifth interval, and a sixth interval; determining the initial opening of the electronic expansion valve during the defrost period in the next heating cycle based on the interval in which the operating time falls and the opening of the electronic expansion valve includes: if the operating time is in the first interval, adding a first revision value to the opening of the electronic expansion valve during the defrost period in the current heating cycle, and determining the modified opening of the electronic expansion valve as the initial opening of the electronic expansion valve during the defrost period in the next heating cycle; if the operating time is in the second interval, adding a second revision value to the opening of the electronic expansion valve during the defrost period in the current heating cycle, and determining the modified opening of the electronic expansion valve as the initial opening of the electronic expansion valve during the defrost period in the next heating cycle; if the operating time is in the third interval, then... The opening degree of the electronic expansion valve during the defrosting period in the current heating cycle is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the operating time is in the fourth interval, the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle is reduced by a third revision value, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the operating time is in the fifth interval, the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle is reduced by a fourth revision value, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the operating time is in the sixth interval, the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle is reduced by a fifth revision value, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle.

[0009] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioner, the air conditioner having a heating mode and a defrosting mode; the air conditioner is capable of heating in an ultra-low temperature environment; the heating cycle of the air conditioner in the ultra-low temperature environment includes a heating period and a defrosting period, the air conditioner operating in heating mode during the heating period and in defrosting mode during the defrosting period; the device includes: a control unit configured to determine whether the air conditioner starts heating for the first time in an ultra-low temperature environment; and an acquisition unit configured to, if it is determined that the air conditioner starts heating for the first time in an ultra-low temperature environment... Upon commencement of heating, after the completion of the current heating cycle, the operating time of the defrost period and the initial opening degree of the electronic expansion valve during the current heating cycle are acquired. The control unit is further configured to determine the initial opening degree of the electronic expansion valve during the defrost period in the next heating cycle based on the operating time of the defrost period and the initial opening degree of the electronic expansion valve during the current heating cycle. The control unit is also configured to control the opening degree of the electronic expansion valve during the defrost period in the next heating cycle based on the initial opening degree of the electronic expansion valve during the defrost period in the next heating cycle.

[0010] In some embodiments, the control unit determines whether the air conditioner starts heating for the first time in an ultra-low temperature environment, including: if the air conditioner starts heating after being powered on for the first time in an ultra-low temperature environment, and / or starts heating after the air conditioner's compressor has been off for two hours or more in an ultra-low temperature environment, then the air conditioner is determined to be starting heating for the first time in an ultra-low temperature environment; the control unit determines the initial opening of the electronic expansion valve in the next heating cycle based on the running time of the defrost period in the current heating cycle and the initial opening of the electronic expansion valve, including: determining the interval of the running time based on the running time of the defrost period in the current heating cycle; and determining the initial opening of the electronic expansion valve in the next heating cycle based on the interval of the running time and the opening of the electronic expansion valve.

[0011] In some embodiments, the control unit determines the interval of the operating time based on the operating time during the defrosting period in the current heating cycle, including: if the operating time is less than or equal to a first preset time, then the operating time is determined to be in a first interval; if the operating time is greater than the first preset time and less than or equal to a second preset time, then the operating time is determined to be in a second interval; if the operating time is greater than the second preset time and less than or equal to a third preset time, then the operating time is determined to be in a third interval; if the operating time is greater than the third preset time and less than or equal to a fourth preset time, then the operating time is determined to be in a fourth interval; if the operating time is greater than the fourth preset time and less than or equal to a fifth preset time, then the operating time is determined to be in a fifth interval; if the operating time is greater than the fifth preset time, then the operating time is determined to be in a sixth interval.

[0012] In conjunction with the above-described device, the present invention further provides an air conditioner, comprising: the control device for the air conditioner described above.

[0013] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device on which the storage medium is located executes the air conditioning control method described above.

[0014] The present invention addresses the issue that, in an air conditioner operating in ultra-low temperature environments, the heating cycle includes a heating period and a defrosting period. During the initial operation in an ultra-low temperature environment, the defrosting period's operating time and the initial opening of the electronic expansion valve are obtained after the current heating cycle ends. Based on these data, the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle is determined. At the start of the next heating cycle, the opening of the electronic expansion valve for the defrosting period is controlled according to the determined initial opening, thereby adjusting the defrosting period's operating time and preventing it from being too long or too short. Since the defrosting period's operating time affects the operating time of the next heating period, adjusting the defrosting period's operating time reasonably corrects the operating time of the next heating period. This avoids problems such as excessively long heating period operating times leading to severe frosting on the outdoor unit, and insufficient system performance due to excessively short heating period operating times. This improves the overall performance of the air conditioner under frosty conditions and enhances the user experience.

[0015] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating an embodiment of the air conditioner control method of the present invention;

[0018] Figure 2 This is a schematic flowchart of an embodiment of the method of the present invention for determining the initial opening degree of the electronic expansion valve for the next defrost period based on the operating parameters of the current defrost period;

[0019] Figure 3 This is a schematic diagram of the structure of an embodiment of the air conditioner control device of the present invention;

[0020] Figure 4 This is a schematic flowchart illustrating an embodiment of controlling the initial opening of the electronic expansion valve in the defrosting mode of an air conditioner according to the present invention.

[0021] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0022] 102 - Acquisition unit; 104 - Control unit. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0024] In ultra-low temperature heating experiments, a complete ultra-low temperature heating cycle is divided into a heating period and a defrosting period. When the air conditioner is operating in ultra-low temperature heating mode, the time from the start to the end of the defrosting cycle is recorded. Based on the time range, it is determined whether the operating time of the next heating cycle will increase or decrease. Therefore, the length of the defrosting time affects the duration of the next heating cycle. The ultra-low temperature experiment is a test requirement based on summaries of daily usage conditions, meaning it is consistent with everyday usage scenarios.

[0025] When an air conditioner is heating in extremely low temperatures, if the defrosting time is too long, it indicates that the outdoor unit is prone to frost buildup. In this case, shortening the operating time of the next heating cycle based on the defrosting time can prevent excessive frost buildup on the outdoor unit due to prolonged heating. However, this can lead to the air conditioner not reaching its maximum performance due to insufficient heating time. Conversely, if the defrosting time is too short, increasing the operating time of the next heating cycle will increase the degree of frost buildup on the outdoor unit, thus reducing the overall performance of the air conditioner. From the above process, it is clear that adjusting the heating time based on the defrosting time can lead to over-adjustment. Adjusting the operating time during the heating cycle can result in either too long or too short a heating period. Too long a period will lead to excessive frost buildup on the outdoor unit, reducing the overall capacity of the unit; too short a period will result in ineffective heating of the indoor environment, affecting heating efficiency. In the relevant solutions, the opening of the electronic expansion valve for the next heating period is adjusted by the parameters of the defrosting period. Although this method can avoid severe frost formation on the outdoor unit during heating, it still does not solve the problem that the next heating period is too long or too short due to the defrosting time being too fast or too slow.

[0026] Therefore, this invention provides an air conditioner control method. When the air conditioner is heating at ultra-low temperatures, the initial opening of the electronic expansion valve for the next defrost is determined based on the defrost time and electronic expansion valve opening during the previous defrost. This adjusts the defrost time while ensuring the defrost effect, thereby reasonably correcting the duration of the next heating cycle. This avoids problems such as reduced air conditioner capacity due to excessively long heating cycles and reduced heating efficiency due to excessively short heating cycles.

[0027] According to an embodiment of the present invention, a control method for an air conditioner is provided. The air conditioner has a heating mode and a defrosting mode. The air conditioner is capable of heating in ultra-low temperature environments, wherein an environment where the outdoor ambient temperature reaches below 0°C is considered an ultra-low temperature environment. The heating cycle of the air conditioner in ultra-low temperature environments includes a heating period and a defrosting period. During the heating period, the air conditioner operates in heating mode, and during the defrosting period, the air conditioner operates in defrosting mode. That is, a heating cycle includes two stages: a heating period and a defrosting period. When the air conditioner is heating in an ultra-low temperature environment, it begins to cycle through the heating cycle. The operating time of the defrosting period in the current heating cycle affects the operating time of the heating period in the next heating cycle. Figure 1 The diagram shows a flowchart of an embodiment of the method of the present invention. The air conditioner control method may include steps S110 to S140.

[0028] In step S110, it is determined whether the air conditioner starts heating for the first time in an ultra-low temperature environment.

[0029] In some implementations, step S110, determining whether the air conditioner starts heating for the first time in an ultra-low temperature environment, includes: if the air conditioner starts heating after being powered on for the first time in an ultra-low temperature environment, or if the air conditioner starts heating after its compressor has been off for two hours or more in an ultra-low temperature environment, then the air conditioner is determined to be starting heating for the first time in an ultra-low temperature environment.

[0030] In step S120, if it is determined that the air conditioner starts heating for the first time in an ultra-low temperature environment, then after the end of this heating cycle, the running time of the defrosting period in this heating cycle and the initial opening degree of the electronic expansion valve are obtained.

[0031] When an air conditioner is heating in an ultra-low temperature environment, the complete heating cycle consists of heating followed by defrosting. Assuming the air conditioner starts heating in an ultra-low temperature environment, and the heating period lasts for h1, then defrosting begins after heating ends. The air conditioner records the defrosting time T1 from start to finish, determines the range of T1, and then calculates the change in operating time δ for the next heating period. t1 The change in runtime δ t1 It can be positive, negative, or 0. Therefore, the operating time of the heating period in the next heating cycle is calculated as h2 = h1 + δ. t1 Then, the next ultra-low temperature heating cycle begins. The operating time of the heating period is controlled according to the calculated time h2. Then, the operating time of the subsequent heating period is controlled according to the defrosting period operating time in the current heating cycle, and so on. In this control logic, the operating time h2 of the next heating period is affected by the operating time h1 of the previous heating period. However, for the first operation of the air conditioner in ultra-low temperature heating, there is no previous heating cycle, i.e., no previous heating period operating time h1. If the operating time of the heating period in the first heating cycle is controlled according to the above logic, a judgment error will occur. Therefore, the method of this invention starts execution after the first heating cycle has ended, avoiding errors in controlling the operating time of the heating period in the first heating cycle, thereby improving the accuracy of air conditioner control.

[0032] In step S130, based on the running time of the defrosting period in the current heating cycle and the initial opening of the electronic expansion valve, the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle is determined.

[0033] In some embodiments, the specific process of determining the initial opening of the electronic expansion valve during the defrost period in the next heating cycle based on the running time of the defrost period and the initial opening of the electronic expansion valve in the current heating cycle in step S130 is illustrated in the following exemplary description.

[0034] Figure 2This is a schematic flowchart illustrating an embodiment of the method of the present invention for determining the initial opening degree of the electronic expansion valve for the next defrost period based on the operating parameters of the current defrost period. Figure 2 As shown, step S130, which determines the initial opening of the electronic expansion valve during the defrost period in the next heating cycle based on the running time of the defrost period in the current heating cycle and the initial opening of the electronic expansion valve, includes steps S210 and S220.

[0035] Step S210: Determine the interval of the defrosting period based on the operating time during the current heating cycle.

[0036] In some implementations, the interval of the operating time is determined based on the operating time during the defrosting period in the current heating cycle, including: if the operating time is less than or equal to a first preset time, the operating time is determined to be in a first interval; if the operating time is greater than the first preset time and less than or equal to a second preset time, the operating time is determined to be in a second interval; if the operating time is greater than the second preset time and less than or equal to a third preset time, the operating time is determined to be in a third interval; if the operating time is greater than the third preset time and less than or equal to a fourth preset time, the operating time is determined to be in a fourth interval; if the operating time is greater than the fourth preset time and less than or equal to a fifth preset time, the operating time is determined to be in a fifth interval; and if the operating time is greater than the fifth preset time, the operating time is determined to be in a sixth interval.

[0037] Specifically, the first preset time can be set to 150s, the second preset time can be set to 180s, the third preset time can be set to 240s, the fourth preset time can be set to 300s, and the fifth preset time can be set to 360s. The first to fifth preset times can be adjusted according to the actual situation. Therefore, if the defrosting period running time t in the heating cycle is less than or equal to 150s, then the running time t is determined to be in the first interval; if the defrosting period running time t in the heating cycle is greater than 150s and less than or equal to 180s, then the running time t is determined to be in the second interval; if the defrosting period running time t in the heating cycle is greater than 180s and less than or equal to 240s, then the running time t is determined to be in the third interval; if the defrosting period running time t in the heating cycle is greater than 240s and less than or equal to 300s, then the running time t is determined to be in the fourth interval; if the defrosting period running time t in the heating cycle is greater than 300s and less than or equal to 360s, then the running time t is determined to be in the fifth interval; and if the defrosting period running time t in the heating cycle is greater than 360s, then the running time t is determined to be in the sixth interval.

[0038] Step S220: Determine the initial opening of the electronic expansion valve during the defrosting period in the next heating cycle based on the interval of the running time and the opening degree of the electronic expansion valve.

[0039] Specifically, when the air conditioner is first used for heating in an ultra-low temperature environment, after the first heating cycle is completed, the opening degree p0 of the electronic expansion valve during the defrosting period of the first heating cycle and the running time t0 of the defrosting period are obtained. The range of t0 is determined based on the value of the running time t0. Different ranges correspond to different calculation methods for the initial opening degree of the electronic expansion valve during the defrosting period of the next heating cycle. Based on the calculation method corresponding to the range of t0 and the opening degree p0 of the electronic expansion valve during the defrosting period of the current heating cycle, the initial opening degree p1 of the electronic expansion valve during the defrosting period of the next heating cycle is calculated.

[0040] In some embodiments, the interval in which the operating time falls includes at least one of a first interval, a second interval, a third interval, a fourth interval, a fifth interval, and a sixth interval. In step S220, determining the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle based on the interval in which the operating time falls and the opening of the electronic expansion valve includes: if the operating time is in the first interval, adding a first revision value to the opening of the electronic expansion valve during the defrosting period of the current heating cycle, and determining the modified opening of the electronic expansion valve as the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle; if the operating time is in the second interval, adding a second revision value to the opening of the electronic expansion valve during the defrosting period of the current heating cycle, and determining the modified opening of the electronic expansion valve as the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle; if the operating time is in the third interval, determining the opening of the electronic expansion valve during the defrosting period of the current heating cycle as the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle. The initial opening degree of the electronic expansion valve during the defrosting period in the current heating cycle is determined as follows: If the operating time is in the fourth interval, the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle is reduced by a third revision value, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle; if the operating time is in the fifth interval, the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle is reduced by a fourth revision value, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle; if the operating time is in the sixth interval, the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle is reduced by a fifth revision value, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle.

[0041] Specifically, the first revision value can be set to 30P, the second revision value can be set to 20P, the third revision value can be set to 15P, the fourth revision value can be set to 10P, and the fifth revision value can be set to 8P, where P is the opening unit of the electronic expansion valve. The first to fifth revision values ​​can also be adjusted according to the actual situation. Therefore, if the operating time t is in the first interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 + 30P; if the operating time t is in the second interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 + 20P; if the operating time t is in the third interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0; if the operating time t is in the fourth interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 - 15P; if the operating time t is in the fifth interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 - 10P; if the operating time t is in the sixth interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 - 8P.

[0042] Figure 4 This is a schematic flowchart illustrating an embodiment of the control of the initial opening degree of the electronic expansion valve in the defrost mode of an air conditioner according to the present invention. Figure 4 As shown, the control method of the present invention includes:

[0043] Step 1: After the air conditioner operates in an ultra-low temperature environment and completes a full heating cycle, obtain the defrosting time t during the defrosting period of the completed heating cycle, as well as the opening degree p0 of the electronic expansion valve during the defrosting period, and then proceed to Step 2.

[0044] Step 2: Determine the range of defrost time t within the defrost period of the completed heating cycle. Based on this range, determine the calculation formula for the opening degree of the electronic expansion valve in the next defrost period. Different ranges correspond to different calculation formulas. Then proceed to Step 3.

[0045] Step 3: Based on the calculation formula and the electronic expansion valve opening p0 of the previous defrost period, calculate the initial opening p of the electronic expansion valve for the next defrost period. Then, start the next heating cycle, controlling the opening of the electronic expansion valve according to the initial opening p at the beginning of the next defrost period.

[0046] Therefore, the solution of this invention, when the air conditioner is operating in an ultra-low temperature environment for heating, determines the initial opening of the electronic expansion valve for the next defrost period based on the defrost period's operating time after the current heating cycle ends. Based on this calculation method and the electronic expansion valve opening during the current defrost period, the initial opening of the electronic expansion valve for the next defrost period is calculated. The opening of the electronic expansion valve for the next defrost period is then controlled according to the calculated initial opening, thereby adjusting the operating time of the next defrost period and solving the problem of excessively long or short defrost times. Since the defrost period's operating time affects the operating time of the next heating period, adjusting the defrost period's operating time allows for reasonable correction of the subsequent heating period's operating time. This avoids excessive adjustment of the next heating period's operating time due to an excessively long or short defrost period, improving the overall capacity of the air conditioner and solving the problem of excessive capacity reduction under frost conditions.

[0047] In step S140, in the next heating cycle, the opening degree of the electronic expansion valve during the defrost period in the next heating cycle is controlled according to the initial opening degree of the electronic expansion valve during the defrost period in the next heating cycle.

[0048] During defrosting of the outdoor unit of an air conditioner, defrosting is achieved using heat from the compressor's exhaust and the indoor environment. After heat exchange, the refrigerant passes through the electronic expansion valve for throttling before flowing through the indoor unit's evaporator and finally returning to the compressor for the next cycle. Within a single cycle, the initial opening of the electronic expansion valve during defrosting alters the amount of refrigerant flowing into the compressor, consequently changing the compressor's exhaust temperature and the amount of heat used for defrosting. Since defrosting ends when the outdoor heat exchanger's pipe temperature reaches a specified level, changes in the amount of heat used for defrosting alter the time required for the outdoor heat exchanger's pipe temperature to reach that level, thus affecting the defrosting time. The defrosting time is used to adjust the operating time of the next heating cycle. Therefore, by adjusting the initial opening of the electronic expansion valve in the defrosting mode of the next heating cycle, the operating time of the heating mode in subsequent heating cycles can be effectively controlled.

[0049] The present invention addresses the issue that when an air conditioner is first operated in an ultra-low temperature environment for heating, after the defrosting period of the heating cycle ends, the operating time during the defrosting period and the initial opening of the electronic expansion valve are obtained. Based on this, the initial opening of the electronic expansion valve during the defrosting period of the next heating cycle is determined and adjusted. By adjusting the initial opening of the electronic expansion valve during the defrosting period, the operating time of the air conditioner during the defrosting period is adjusted, thereby reasonably correcting the operating time of the air conditioner during the heating period. This solves the problems of a significant decrease in the overall capacity of the air conditioner due to excessively long heating operating time and low heating efficiency due to excessively short heating operating time.

[0050] The technical solution of this invention provides a heating cycle for air conditioners operating in ultra-low temperature environments, comprising a heating period and a defrosting period. During the initial operation in an ultra-low temperature environment, the defrosting period's operating time and the initial opening of the electronic expansion valve are obtained after the current heating cycle ends. Based on the operating time and the electronic expansion valve's opening, the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle is determined. At the start of the next heating cycle, the opening of the electronic expansion valve for the defrosting period is controlled according to the determined initial opening, thereby adjusting the defrosting period's operating time and preventing it from being too long or too short. Since the defrosting period's operating time affects the operating time of the next heating period, adjusting the defrosting period's operating time reasonably corrects the operating time of the next heating period. This avoids problems such as severe frosting on the outdoor unit due to an excessively long heating period or insufficient system performance due to an excessively short heating period, thus improving the overall performance of the air conditioner under frosty conditions and enhancing the user experience.

[0051] According to an embodiment of the present invention, a control device for an air conditioner corresponding to the control method for an air conditioner is also provided. The air conditioner has a heating mode and a defrosting mode; the air conditioner is capable of heating in ultra-low temperature environments, wherein an environment where the outdoor ambient temperature reaches below 0°C is considered an ultra-low temperature environment; the heating cycle of the air conditioner in ultra-low temperature environments includes a heating period and a defrosting period, during which the air conditioner operates in heating mode, and during the defrosting period, the air conditioner operates in defrosting mode; that is, a heating cycle includes two stages: a heating period and a defrosting period. When the air conditioner is heating in an ultra-low temperature environment, the air conditioner will begin to cycle through the heating cycle, and the operating time of the defrosting period in the current heating cycle will affect the operating time of the heating period in the next heating cycle. See also Figure 3 The diagram shows a structural schematic of an embodiment of the device of the present invention. The control device for the air conditioner may include: an acquisition unit 102 and a control unit 104.

[0052] The control unit 104 is configured to determine whether the air conditioner starts heating for the first time in an ultra-low temperature environment. The specific functions and processing of the control unit 104 are described in step S110.

[0053] In some embodiments, the control unit 104 determines whether the air conditioner starts heating for the first time in an ultra-low temperature environment, including: the control unit 104 is further configured to determine that the air conditioner starts heating for the first time in an ultra-low temperature environment if it starts heating after being powered on for the first time in an ultra-low temperature environment, and / or starts heating after the compressor of the air conditioner has been shut down for two hours or more in an ultra-low temperature environment.

[0054] The acquisition unit 102 is configured to, if it is determined that the air conditioner starts heating for the first time in an ultra-low temperature environment, acquire the defrosting period operation time and the initial opening degree of the electronic expansion valve during the current heating cycle after the current heating cycle ends. The specific functions and processing of the acquisition unit 102 are described in step S120.

[0055] When an air conditioner is heating in an ultra-low temperature environment, the complete heating cycle consists of heating followed by defrosting. Assuming the air conditioner starts heating in an ultra-low temperature environment, and the heating period lasts for h1, then defrosting begins after heating ends. The air conditioner records the defrosting time T1 from start to finish, determines the range of T1, and then calculates the change in operating time δ for the next heating period. t1 The change in runtime δ t1 It can be positive, negative, or 0. Therefore, the operating time of the heating period in the next heating cycle is calculated as h2 = h1 + δ. t1 Then, the next ultra-low temperature heating cycle begins. The operating time of the heating period is controlled according to the calculated time h2. Then, the operating time of the subsequent heating period is controlled according to the defrosting period operating time in the current heating cycle, and so on. In this control logic, the operating time h2 of the next heating period is affected by the operating time h1 of the previous heating period. However, for the first operation of the air conditioner in ultra-low temperature heating, there is no previous heating cycle, i.e., no previous heating period operating time h1. If the operating time of the heating period in the first heating cycle is controlled according to the above logic, a judgment error will occur. Therefore, the method of this invention starts execution after the first heating cycle has ended, avoiding errors in controlling the operating time of the heating period in the first heating cycle, thereby improving the accuracy of air conditioner control.

[0056] The control unit 104 is further configured to determine the initial opening of the electronic expansion valve during the defrost period in the next heating cycle based on the operating time of the defrost period and the initial opening of the electronic expansion valve in the current heating cycle. The specific functions and processing of this control unit 104 are described in step S130.

[0057] In some embodiments, the control unit 104 determines the initial opening of the electronic expansion valve for the defrost period in the next heating cycle based on the operating time of the defrost period and the initial opening of the electronic expansion valve in the current heating cycle, including:

[0058] The control unit 104 is further configured to determine the interval of the operating time based on the operating time of the defrosting period in the current heating cycle. The specific functions and processing of the control unit 104 are described in step S210.

[0059] In some embodiments, the control unit 104 determines the interval of the operating time based on the operating time during the defrosting period in the current heating cycle, including: if the operating time is less than or equal to a first preset time, then the operating time is determined to be in a first interval; if the operating time is greater than the first preset time and less than or equal to a second preset time, then the operating time is determined to be in a second interval; if the operating time is greater than the second preset time and less than or equal to a third preset time, then the operating time is determined to be in a third interval; if the operating time is greater than the third preset time and less than or equal to a fourth preset time, then the operating time is determined to be in a fourth interval; if the operating time is greater than the fourth preset time and less than or equal to a fifth preset time, then the operating time is determined to be in a fifth interval; if the operating time is greater than the fifth preset time, then the operating time is determined to be in a sixth interval.

[0060] Specifically, the first preset time can be set to 150s, the second preset time can be set to 180s, the third preset time can be set to 240s, the fourth preset time can be set to 300s, and the fifth preset time can be set to 360s. The first to fifth preset times can be adjusted according to the actual situation. Therefore, if the defrosting period running time t in the heating cycle is less than or equal to 150s, then the running time t is determined to be in the first interval; if the defrosting period running time t in the heating cycle is greater than 150s and less than or equal to 180s, then the running time t is determined to be in the second interval; if the defrosting period running time t in the heating cycle is greater than 180s and less than or equal to 240s, then the running time t is determined to be in the third interval; if the defrosting period running time t in the heating cycle is greater than 240s and less than or equal to 300s, then the running time t is determined to be in the fourth interval; if the defrosting period running time t in the heating cycle is greater than 300s and less than or equal to 360s, then the running time t is determined to be in the fifth interval; and if the defrosting period running time t in the heating cycle is greater than 360s, then the running time t is determined to be in the sixth interval.

[0061] The control unit 104 is further configured to determine the initial opening of the electronic expansion valve during the defrosting period of the next heating cycle based on the interval in which the operating time is located and the opening degree of the electronic expansion valve. The specific functions and processing of this control unit 104 are described in step S220.

[0062] Specifically, when the air conditioner is first used for heating in an ultra-low temperature environment, after the first heating cycle is completed, the opening degree p0 of the electronic expansion valve during the defrosting period of the first heating cycle and the running time t0 of the defrosting period are obtained. The range of t0 is determined based on the value of the running time t0. Different ranges correspond to different calculation methods for the initial opening degree of the electronic expansion valve during the defrosting period of the next heating cycle. Based on the calculation method corresponding to the range of t0 and the opening degree p0 of the electronic expansion valve during the defrosting period of the current heating cycle, the initial opening degree p1 of the electronic expansion valve during the defrosting period of the next heating cycle is calculated.

[0063] In some embodiments, the interval in which the operating time falls includes at least one of a first interval, a second interval, a third interval, a fourth interval, a fifth interval, and a sixth interval. The control unit 104 determines the initial opening of the electronic expansion valve during the defrost period of the next heating cycle based on the interval in which the operating time falls and the opening degree of the electronic expansion valve. This includes: if the operating time is in the first interval, adding a first revision value to the opening degree of the electronic expansion valve during the defrost period of the current heating cycle, and determining the modified opening degree of the electronic expansion valve as the initial opening degree of the electronic expansion valve during the defrost period of the next heating cycle; if the operating time is in the second interval, adding a second revision value to the opening degree of the electronic expansion valve during the defrost period of the current heating cycle, and determining the modified opening degree of the electronic expansion valve as the initial opening degree of the electronic expansion valve during the defrost period of the next heating cycle; if the operating time is in the third interval, determining the opening degree of the electronic expansion valve during the defrost period of the current heating cycle as the initial opening degree of the electronic expansion valve during the defrost period of the next heating cycle. The initial opening degree of the electronic expansion valve during the defrost period in the cycle; if the operating time is in the fourth interval, then the opening degree of the electronic expansion valve during the defrost period in the current heating cycle is reduced by a third revision value, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrost period in the next heating cycle; if the operating time is in the fifth interval, then the opening degree of the electronic expansion valve during the defrost period in the current heating cycle is reduced by a fourth revision value, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrost period in the next heating cycle; if the operating time is in the sixth interval, then the opening degree of the electronic expansion valve during the defrost period in the current heating cycle is reduced by a fifth revision value, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrost period in the next heating cycle.

[0064] Specifically, the first revision value can be set to 30P, the second revision value to 20P, the third revision value to 15P, the fourth revision value to 10P, and the fifth revision value to 8P, where P is the unit of opening degree of the electronic expansion valve, used to measure the degree of opening of the electronic expansion valve. The first to fifth revision values ​​can also be adjusted according to the actual situation. Therefore, if the operating time t is in the first interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 + 30P; if the operating time t is in the second interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 + 20P; if the operating time t is in the third interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0; if the operating time t is in the fourth interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 - 15P; if the operating time t is in the fifth interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 - 10P; if the operating time t is in the sixth interval, the initial opening of the electronic expansion valve during the defrost period in the next heating cycle is p1 = p0 - 8P.

[0065] Figure 4 This is a schematic flowchart illustrating an embodiment of the control of the initial opening degree of the electronic expansion valve in the defrost mode of an air conditioner according to the present invention. Figure 4 As shown, the control method of the present invention includes:

[0066] Step 1: After the air conditioner operates in an ultra-low temperature environment and completes a full heating cycle, obtain the defrosting time t during the defrosting period of the completed heating cycle, as well as the opening degree p0 of the electronic expansion valve during the defrosting period, and then proceed to Step 2.

[0067] Step 2: Determine the range of defrost time t within the defrost period of the completed heating cycle. Based on this range, determine the calculation formula for the opening degree of the electronic expansion valve in the next defrost period. Different ranges correspond to different calculation formulas. Then proceed to Step 3.

[0068] Step 3: Based on the calculation formula and the electronic expansion valve opening p0 of the previous defrost period, calculate the initial opening p of the electronic expansion valve for the next defrost period. Then, start the next heating cycle, controlling the opening of the electronic expansion valve according to the initial opening p at the beginning of the next defrost period.

[0069] Therefore, the solution of this invention, when the air conditioner is operating in an ultra-low temperature environment for heating, determines the initial opening of the electronic expansion valve for the next defrost period based on the defrost period's operating time after the current heating cycle ends. Based on this calculation method and the electronic expansion valve opening during the current defrost period, the initial opening of the electronic expansion valve for the next defrost period is calculated. The opening of the electronic expansion valve for the next defrost period is then controlled according to the calculated initial opening, thereby adjusting the operating time of the next defrost period and solving the problem of excessively long or short defrost times. Since the defrost period's operating time affects the operating time of the next heating period, adjusting the defrost period's operating time allows for reasonable correction of the subsequent heating period's operating time. This avoids excessive adjustment of the next heating period's operating time due to an excessively long or short defrost period, improving the overall capacity of the air conditioner and solving the problem of excessive capacity reduction under frost conditions.

[0070] The control unit 104 is further configured to control the opening degree of the electronic expansion valve during the defrost period in the next heating cycle, based on the initial opening degree of the electronic expansion valve during the defrost period in the next heating cycle. The specific functions and processing of this control unit 104 are described in step S140.

[0071] During defrosting of the outdoor unit of an air conditioner, defrosting is achieved using heat from the compressor's exhaust and the indoor environment. After heat exchange, the refrigerant passes through the electronic expansion valve for throttling before flowing through the indoor unit's evaporator and finally returning to the compressor for the next cycle. Within a single cycle, the initial opening of the electronic expansion valve during defrosting alters the amount of refrigerant flowing into the compressor, consequently changing the compressor's exhaust temperature and the amount of heat used for defrosting. Since defrosting ends when the outdoor heat exchanger's pipe temperature reaches a specified level, changes in the amount of heat used for defrosting alter the time required for the outdoor heat exchanger's pipe temperature to reach that level, thus affecting the defrosting time. The defrosting time is used to adjust the operating time of the next heating cycle. Therefore, by adjusting the initial opening of the electronic expansion valve in the defrosting mode of the next heating cycle, the operating time of the heating mode in subsequent heating cycles can be effectively controlled.

[0072] The present invention addresses the issue that when an air conditioner is first operated in an ultra-low temperature environment for heating, after the defrosting period of the heating cycle ends, the operating time during the defrosting period and the initial opening of the electronic expansion valve are obtained. Based on this, the initial opening of the electronic expansion valve during the defrosting period of the next heating cycle is determined and adjusted. By adjusting the initial opening of the electronic expansion valve during the defrosting period, the operating time of the air conditioner during the defrosting period is adjusted, thereby reasonably correcting the operating time of the air conditioner during the heating period. This solves the problems of a significant decrease in the overall capacity of the air conditioner due to excessively long heating operating time and low heating efficiency due to excessively short heating operating time.

[0073] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0074] The technical solution of this invention provides a heating cycle for air conditioners operating in ultra-low temperature environments, comprising a heating period and a defrosting period. During the initial operation in an ultra-low temperature environment, the defrosting period's operating time and the initial opening of the electronic expansion valve are obtained after the current heating cycle ends. Based on the operating time and the electronic expansion valve's opening, the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle is determined. At the start of the next heating cycle, the opening of the electronic expansion valve for the defrosting period is controlled according to the determined initial opening, thereby adjusting the defrosting period's operating time and preventing it from being too long or too short. Since the defrosting period's operating time affects the operating time of the next heating period, adjusting the defrosting period's operating time reasonably corrects the operating time of the next heating period. This avoids problems such as severe frosting on the outdoor unit due to an excessively long heating period or insufficient system performance due to an excessively short heating period, thus improving the overall performance of the air conditioner under frosty conditions and enhancing the user experience.

[0075] According to an embodiment of the present invention, an air conditioner corresponding to an air conditioner control device is also provided. This air conditioner may include the air conditioner control device described above.

[0076] Since the processing and functions implemented by the air conditioner in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned device, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0077] The technical solution of this invention provides a heating cycle for air conditioners operating in ultra-low temperature environments, comprising a heating period and a defrosting period. During the initial operation in an ultra-low temperature environment, the defrosting period's operating time and the initial opening of the electronic expansion valve are obtained after the current heating cycle ends. Based on the operating time and the electronic expansion valve's opening, the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle is determined. At the start of the next heating cycle, the opening of the electronic expansion valve for the defrosting period is controlled according to the determined initial opening, thereby adjusting the defrosting period's operating time and preventing it from being too long or too short. Since the defrosting period's operating time affects the operating time of the next heating period, adjusting the defrosting period's operating time reasonably corrects the operating time of the next heating period. This avoids problems such as severe frosting on the outdoor unit due to an excessively long heating period or insufficient system performance due to an excessively short heating period, thus improving the overall performance of the air conditioner under frosty conditions and enhancing the user experience.

[0078] According to an embodiment of the present invention, a storage medium corresponding to an air conditioner control method is also provided, the storage medium including a stored program, wherein the program controls the device where the storage medium is located to execute the air conditioner control method described above when it is executed.

[0079] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0080] The technical solution of this invention provides a heating cycle for air conditioners operating in ultra-low temperature environments, comprising a heating period and a defrosting period. During the initial operation in an ultra-low temperature environment, the defrosting period's operating time and the initial opening of the electronic expansion valve are obtained after the current heating cycle ends. Based on the operating time and the electronic expansion valve's opening, the initial opening of the electronic expansion valve for the defrosting period in the next heating cycle is determined. At the start of the next heating cycle, the opening of the electronic expansion valve for the defrosting period is controlled according to the determined initial opening, thereby adjusting the defrosting period's operating time and preventing it from being too long or too short. Since the defrosting period's operating time affects the operating time of the next heating period, adjusting the defrosting period's operating time reasonably corrects the operating time of the next heating period. This avoids problems such as severe frosting on the outdoor unit due to an excessively long heating period or insufficient system performance due to an excessively short heating period, thus improving the overall performance of the air conditioner under frosty conditions and enhancing the user experience.

[0081] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0082] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of the claims.

Claims

1. A method for controlling an air conditioner, characterized in that, The air conditioner has a heating mode and a defrosting mode; the air conditioner can heat in ultra-low temperature environments; the heating cycle of the air conditioner in ultra-low temperature environments includes a heating period and a defrosting period, during which the air conditioner operates in heating mode and during the defrosting period, the air conditioner operates in defrosting mode; the method includes: Determine whether the air conditioner has started heating for the first time in an ultra-low temperature environment; If it is determined that the air conditioner starts heating for the first time in an ultra-low temperature environment, then after the end of this heating cycle, the running time of the defrosting period in this heating cycle and the initial opening of the electronic expansion valve are obtained. Based on the operating time and initial opening of the electronic expansion valve during the defrosting period in this heating cycle, determine the initial opening of the electronic expansion valve during the defrosting period in the next heating cycle. In the next heating cycle, the opening degree of the electronic expansion valve during the defrost period in the next heating cycle is controlled according to the initial opening degree of the electronic expansion valve during the defrost period in the next heating cycle. Specifically, based on the operating time of the defrost period and the initial opening degree of the electronic expansion valve in the current heating cycle, the initial opening degree of the electronic expansion valve for the defrost period in the next heating cycle is determined, including: Based on the defrosting period running time in this heating cycle, the interval in which the running time is located is determined, and the interval in which the running time is located includes at least one of the following: the first interval, the second interval, the third interval, the fourth interval, the fifth interval, and the sixth interval; Based on the operating time interval and the opening degree of the electronic expansion valve, determine the initial opening degree of the electronic expansion valve during the defrosting period of the next heating cycle, including: If the running time is within the first interval, a first revision value is added to the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the running time is in the second interval, a second revision value is added to the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the running time is in the third interval, the opening degree of the electronic expansion valve during the defrosting period of the current heating cycle will be determined as the initial opening degree of the electronic expansion valve during the defrosting period of the next heating cycle. If the running time is in the fourth interval, the third revision value is reduced based on the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the running time is in the fifth interval, the fourth revision value is reduced based on the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the running time is in the sixth interval, the fifth revision value is reduced based on the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. Among them, the first interval < the second interval < the third interval < the fourth interval < the fifth interval < the sixth interval, the first revised value > the second revised value, the third revised value > the fourth revised value > the fifth revised value.

2. The air conditioning control method according to claim 1, characterized in that, Determining whether the air conditioner has started heating for the first time in an ultra-low temperature environment includes: If the air conditioner starts heating after being powered on for the first time in an ultra-low temperature environment, and / or starts heating two hours or more after the compressor of the air conditioner has stopped in an ultra-low temperature environment, then the air conditioner is determined to have started heating for the first time in an ultra-low temperature environment.

3. The air conditioning control method according to claim 1, characterized in that, Based on the defrosting period's operating time during this heating cycle, the interval within which the operating time falls is determined, including: If the running time is less than or equal to the first preset time, then the running time is determined to be within the first interval; If the running time is greater than the first preset time and less than or equal to the second preset time, then the running time is determined to be in the second interval. If the running time is greater than the second preset time and less than or equal to the third preset time, then the running time is determined to be in the third interval. If the running time is greater than the third preset time and less than or equal to the fourth preset time, then the running time is determined to be in the fourth interval. If the running time is greater than the fourth preset time and less than or equal to the fifth preset time, then the running time is determined to be in the fifth interval. If the running time is greater than the fifth preset time, then the running time is determined to be in the sixth interval.

4. A control device for an air conditioner, characterized in that, The air conditioner has a heating mode and a defrosting mode; the air conditioner can heat in ultra-low temperature environments; the heating cycle of the air conditioner in ultra-low temperature environments includes a heating period and a defrosting period, during which the air conditioner operates in heating mode and during the defrosting period, the air conditioner operates in defrosting mode; the device includes: The control unit is configured to determine whether the air conditioner starts heating for the first time in an ultra-low temperature environment; The acquisition unit is configured to, if it is determined that the air conditioner starts heating for the first time in an ultra-low temperature environment, acquire the running time of the defrosting period and the initial opening degree of the electronic expansion valve in the current heating cycle after the current heating cycle ends. The control unit is further configured to determine the initial opening of the electronic expansion valve during the defrost period in the next heating cycle based on the running time of the defrost period in the current heating cycle and the initial opening of the electronic expansion valve. The control unit is further configured to control the opening degree of the electronic expansion valve during the defrost period in the next heating cycle, based on the initial opening degree of the electronic expansion valve during the defrost period in the next heating cycle. The control unit determines the initial opening of the electronic expansion valve for the defrost period in the next heating cycle based on the operating time of the defrost period in the current heating cycle and the initial opening of the electronic expansion valve, including: Based on the defrosting period running time in this heating cycle, the interval in which the running time is located is determined, and the interval in which the running time is located includes at least one of the following: the first interval, the second interval, the third interval, the fourth interval, the fifth interval, and the sixth interval; Based on the operating time interval and the opening degree of the electronic expansion valve, determine the initial opening degree of the electronic expansion valve during the defrosting period of the next heating cycle, including: If the running time is within the first interval, a first revision value is added to the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the running time is in the second interval, a second revision value is added to the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the running time is in the third interval, the opening degree of the electronic expansion valve during the defrosting period of the current heating cycle will be determined as the initial opening degree of the electronic expansion valve during the defrosting period of the next heating cycle. If the running time is in the fourth interval, the third revision value is reduced based on the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the running time is in the fifth interval, the fourth revision value is reduced based on the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. If the running time is in the sixth interval, the fifth revision value is reduced based on the opening degree of the electronic expansion valve during the defrosting period in the current heating cycle, and the modified opening degree of the electronic expansion valve is determined as the initial opening degree of the electronic expansion valve during the defrosting period in the next heating cycle. Among them, the first interval < the second interval < the third interval < the fourth interval < the fifth interval < the sixth interval, the first revised value > the second revised value, the third revised value > the fourth revised value > the fifth revised value.

5. The air conditioner control device according to claim 4, characterized in that, The control unit determines whether the air conditioner starts heating for the first time in an ultra-low temperature environment, including: If the air conditioner starts heating after being powered on for the first time in an ultra-low temperature environment, and / or starts heating two hours or more after the compressor of the air conditioner has stopped in an ultra-low temperature environment, then the air conditioner is determined to have started heating for the first time in an ultra-low temperature environment.

6. The air conditioner control device according to claim 4, characterized in that, The control unit determines the interval of the operating time based on the operating time of the defrosting period in this heating cycle, including: If the running time is less than or equal to the first preset time, then the running time is determined to be within the first interval; If the running time is greater than the first preset time and less than or equal to the second preset time, then the running time is determined to be in the second interval. If the running time is greater than the second preset time and less than or equal to the third preset time, then the running time is determined to be in the third interval. If the running time is greater than the third preset time and less than or equal to the fourth preset time, then the running time is determined to be in the fourth interval. If the running time is greater than the fourth preset time and less than or equal to the fifth preset time, then the running time is determined to be in the fifth interval. If the running time is greater than the fifth preset time, then the running time is determined to be in the sixth interval.

7. An air conditioner, characterized in that, include: The control device for an air conditioner as described in any one of claims 4 to 6.

8. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the air conditioning control method according to any one of claims 1 to 3.

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