Air conditioner control method and device and air conditioner

Abstract

The invention relates to the technical field of air conditioners, and provides an air conditioner control method and device and an air conditioner. The air conditioner control method comprises the steps that the current evaporation temperature of a compressor of the air conditioner is detected; and determining that the current evaporation temperature of the compressor is greater than or equal to the target evaporation temperature lower limit value, and controlling the opening degree of an electronic expansion valve of the air conditioner according to the current evaporation temperature of the compressor. The phenomenon that the evaporation temperature exceeds the running range during high-temperature running of the compressor can be avoided, so that the compressor is prevented from being damaged, the heat exchange effect of the air conditioner is guaranteed, and the running stability and reliability of the air conditioner are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a control method and device for an air conditioner and an air conditioner. Background Art

[0002] In the related art, air conditioners are limited by the operating range of the compressor, and the evaporation temperature will be limited, that is, the air conditioner has a corresponding operating temperature range. Taking a water-cooled screw air conditioner as an example, the refrigeration is generally at a maximum of 15°C. When the refrigeration is just turned on in summer, the room temperature is very high, and the evaporation temperature can easily exceed the upper limit of the compressor operation, causing the compressor to leak oil. Too much lubricating oil enters the heat exchanger and affects the heat exchange effect. In severe cases, it will cause the compressor to lack oil, resulting in poor lubrication and damage to the compressor, and low reliability of air conditioner operation. Summary of the invention

[0003] The present invention provides a control method and device for an air conditioner, and the air conditioner, which can avoid the phenomenon that the evaporation temperature exceeds the operating range when the compressor is running at high temperature, thereby avoiding damage to the compressor, ensuring the heat exchange effect of the air conditioner, and improving the stability and reliability of the air conditioner operation.

[0004] The present invention provides a method for controlling an air conditioner, comprising:

[0005] Detecting the current evaporation temperature of the air conditioner compressor;

[0006] It is determined that the current evaporation temperature of the compressor is greater than or equal to a target evaporation temperature lower limit value, and the opening degree of the electronic expansion valve of the air conditioner is controlled according to the current evaporation temperature of the compressor.

[0007] According to a control method of an air conditioner provided by the present invention, the step of controlling the opening of the electronic expansion valve of the air conditioner according to the current evaporation temperature of the compressor specifically includes:

[0008] Determining that the current evaporation temperature of the compressor is greater than the target evaporation temperature upper limit value, and reducing the opening of the electronic expansion valve;

[0009] Determining that the current evaporation temperature of the compressor is equal to the target evaporation temperature upper limit value, and maintaining the opening of the electronic expansion valve;

[0010] Determine that the current evaporation temperature of the compressor is greater than or equal to a target evaporation temperature lower limit value and less than a target evaporation temperature upper limit value, and increase the opening of the electronic expansion valve.

[0011] A control method for an air conditioner according to the present invention further includes:

[0012] It is determined that the current evaporation temperature of the compressor is less than a lower limit of a target evaporation temperature, and the opening of an electronic expansion valve of the air conditioner is controlled according to the suction superheat of the compressor.

[0013] According to a control method of an air conditioner provided by the present invention, the step of controlling the opening of the electronic expansion valve of the air conditioner according to the suction superheat of the compressor specifically includes:

[0014] Determining that the suction superheat of the compressor is greater than a target superheat, and increasing the opening of the electronic expansion valve;

[0015] Determining that the suction superheat of the compressor is equal to the target superheat, and maintaining the opening of the electronic expansion valve;

[0016] It is determined that the suction superheat of the compressor is less than the target superheat, and the opening of the electronic expansion valve is reduced.

[0017] A control method for an air conditioner according to the present invention further includes:

[0018] When the current evaporation temperature of the compressor is greater than or equal to the target evaporation temperature lower limit value and less than or equal to the target evaporation temperature upper limit value, determining the opening degree of the electronic expansion valve corresponding to the current evaporation temperature according to the first opening degree and the second opening degree;

[0019] The first opening degree is the opening degree of the electronic expansion valve determined at the current moment according to the suction superheat of the compressor, and the second opening degree is the opening degree of the electronic expansion valve determined at the current moment according to the current evaporation temperature of the compressor.

[0020] According to a control method of an air conditioner provided by the present invention, the step of determining the opening degree of the electronic expansion valve corresponding to the current evaporation temperature according to the first opening degree and the second opening degree comprises:

[0021] The opening degree of the electronic expansion valve corresponding to the current evaporation temperature is determined by weighting the first opening degree and the second opening degree.

[0022] According to a control method for an air conditioner provided by the present invention, the weighting method is linear weighting.

[0023] According to a control method of an air conditioner provided by the present invention, the step of determining the opening degree of the electronic expansion valve corresponding to the current evaporation temperature specifically includes:

[0024]

[0025] Among them, x is the opening of the electronic expansion valve corresponding to the current evaporating temperature, m is the first opening, n is the second opening, B is the upper limit value of the target evaporating temperature, C is the lower limit value of the target evaporating temperature, and D is the current evaporating temperature of the compressor.

[0026] The present invention also provides a control device for an air conditioner, comprising:

[0027] A detection module, used for detecting the current evaporation temperature of the compressor of the air conditioner;

[0028] The control module is used to determine whether the current evaporation temperature of the compressor is greater than or equal to the lower limit of the target evaporation temperature, and control the opening of the electronic expansion valve of the air conditioner according to the current evaporation temperature of the compressor.

[0029] The present invention also provides an air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned air conditioner control method when executing the program.

[0030] The control method, device and air conditioner of the air conditioner provided by the present invention detect the current evaporating temperature of the compressor of the air conditioner. When the current evaporating temperature of the compressor is greater than or equal to the lower limit of the target evaporating temperature, it means that the compressor is running at a high temperature. Then, according to the current evaporating temperature of the compressor, the opening of the electronic expansion valve of the air conditioner is controlled to adjust the current evaporating temperature. This can avoid the phenomenon that the evaporating temperature exceeds the operating range when the compressor is running at a high temperature, thereby avoiding damage to the compressor, ensuring the heat exchange effect of the air conditioner, and improving the stability and reliability of the air conditioner operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is one of the flow charts of the control method of the air conditioner provided by the present invention;

[0033] Figure 2 This is the second flow chart of the air conditioner control method provided by the present invention;

[0034] Figure 3 This is a third flow chart of the air conditioner control method provided by the present invention;

[0035] Figure 4 It is a structural schematic diagram of the control device of the air conditioner provided by the present invention;

[0036] Figure 5 It is a structural schematic diagram of the air conditioner provided by the present invention.

[0037] Reference numerals:

[0038] 410: detection module; 420: control module;

[0039] 510: processor; 520: communication interface;

[0040] 530: memory; 540: communication bus. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the embodiments of the present invention, it should be noted that the terms “first”, “second”, etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0044] Combine the following Figure 1-Figure 5 The present invention describes an air conditioner control method, an air conditioner control device and an air conditioner.

[0045] According to an embodiment of the first aspect of the present invention, referring to Figure 1 As shown, the control method of the air conditioner provided by the present invention mainly includes the following steps:

[0046] S100, detecting the current evaporation temperature of the compressor of the air conditioner;

[0047] S200: Determine whether the current evaporating temperature of the compressor is greater than or equal to the lower limit of the target evaporating temperature, and control the opening of the electronic expansion valve of the air conditioner according to the current evaporating temperature of the compressor.

[0048] The control method of the air conditioner provided by the embodiment of the present invention detects the current evaporating temperature of the compressor of the air conditioner in real time. When the current evaporating temperature of the compressor is greater than or equal to the lower limit of the target evaporating temperature, it indicates that the compressor is running at a high temperature. Then, according to the current evaporating temperature of the compressor, the opening of the electronic expansion valve of the air conditioner is controlled to adjust the current evaporating temperature. This can avoid the phenomenon that the evaporating temperature exceeds the operating range when the compressor is running at a high temperature, thereby avoiding damage to the compressor, ensuring the heat exchange effect of the air conditioner, and improving the stability and reliability of the air conditioner operation.

[0049] According to one embodiment of the present invention, referring to Figure 2 As shown, the steps of determining that the current evaporation temperature of the compressor is greater than or equal to the lower limit of the target evaporation temperature and controlling the opening of the electronic expansion valve of the air conditioner according to the current evaporation temperature of the compressor specifically include:

[0050] S201, determining that the current evaporation temperature of the compressor is greater than the target evaporation temperature upper limit, and reducing the opening of the electronic expansion valve;

[0051] S202, determining that the current evaporation temperature of the compressor is equal to the target evaporation temperature upper limit value, and maintaining the opening of the electronic expansion valve;

[0052] S203: Determine that the current evaporation temperature of the compressor is greater than or equal to the target evaporation temperature lower limit value and less than the target evaporation temperature upper limit value, and increase the opening of the electronic expansion valve.

[0053] Specifically, when the compressor is running at high temperature, if the current evaporation temperature of the compressor is greater than the upper limit of the target evaporation temperature, it means that the compressor is beyond the operating range. At this time, by reducing the opening of the electronic expansion valve, the refrigerant circulation flow can be reduced, that is, the refrigerant flow entering the evaporator is reduced, so that the evaporator pressure is reduced, thereby reducing the current evaporation temperature, so that the current evaporation temperature is within the target evaporation temperature range. Preferably, by adjusting the opening of the electronic expansion valve, the current evaporation temperature can be stably operated to the upper limit of the target evaporation temperature. On the one hand, it can avoid the evaporation temperature exceeding the operating range when the high temperature is running, and on the other hand, it can ensure the heat exchange effect of the air conditioner.

[0054] When the compressor is running at high temperature, if the current evaporating temperature of the compressor is equal to the upper limit of the target evaporating temperature, it means that the evaporating temperature of the compressor has not exceeded the operating range. At this time, the opening of the electronic expansion valve is maintained unchanged to avoid out-of-range operation, ensure the stable and reliable operation of the compressor, and thus ensure the heat exchange effect of the air conditioner.

[0055] When the compressor is running at high temperature, if the current evaporating temperature of the compressor is lower than the upper limit of the target evaporating temperature, increasing the opening of the electronic expansion valve can increase the refrigerant circulation flow rate, that is, increase the refrigerant flow entering the evaporator, increase the evaporator pressure, and thus increase the current evaporating temperature. The current evaporating temperature can reach the upper limit of the target evaporating temperature, avoid out-of-range operation, and effectively improve the heat exchange effect of the air conditioner.

[0056] Therefore, the control method of the air conditioner provided in the embodiment of the present invention can adjust the opening of the electronic expansion valve in real time according to the evaporation temperature of the compressor when the compressor is running at high temperature, thereby preventing the compressor from exceeding the operating range, thereby achieving the purpose of protecting the compressor and ensuring the heat exchange effect of the air conditioner.

[0057] According to one embodiment of the present invention, referring to Figure 3 As shown, the control method of the air conditioner of the present invention further includes the steps of:

[0058] S300: Determine that the current evaporation temperature of the compressor is less than the lower limit of the target evaporation temperature, and control the opening of the electronic expansion valve of the air conditioner according to the suction superheat of the compressor.

[0059] The step of controlling the opening of the electronic expansion valve of the air conditioner according to the suction superheat of the compressor specifically includes:

[0060] S301, determining that the suction superheat of the compressor is greater than the target superheat, and increasing the opening of the electronic expansion valve;

[0061] S302, determining that the suction superheat of the compressor is equal to the target superheat, and maintaining the opening of the electronic expansion valve;

[0062] S303: Determine that the suction superheat of the compressor is less than the target superheat, and reduce the opening of the electronic expansion valve.

[0063] Specifically, when the current evaporating temperature of the compressor is lower than the lower limit of the target evaporating temperature, it means that the compressor is operating normally at this time. At this time, the suction superheat of the compressor can be detected. If the suction superheat of the compressor is greater than the target superheat, it means that the suction superheat is high and the refrigerant in the evaporator is too little. At this time, increase the opening of the electronic expansion valve and increase the refrigerant flow rate to achieve the target superheat, thereby improving the heat exchange effect of the air conditioner.

[0064] If the suction superheat of the compressor is equal to the target superheat, it means that the refrigerant flow meets the heat exchange requirements. At this time, the opening of the electronic expansion valve is maintained unchanged to ensure the stable and reliable operation of the compressor, thereby ensuring the heat exchange effect of the air conditioner.

[0065] If the suction superheat of the compressor is less than the target superheat, it means that the suction superheat is low and there is too much refrigerant in the evaporator. At this time, reduce the opening of the electronic expansion valve and reduce the refrigerant flow rate to achieve the target superheat, meet the heat exchange requirements, and ensure the heat exchange effect.

[0066] Therefore, the control method of the air conditioner provided in the embodiment of the present invention can control the opening of the electronic expansion valve according to the suction superheat of the compressor when the compressor is operating normally, thereby improving the operating reliability of the compressor and ensuring the heat exchange effect of the air conditioner.

[0067] According to one embodiment of the present invention, the control method of the air conditioner of the present invention further includes: when the current evaporation temperature of the compressor is greater than or equal to the lower limit value of the target evaporation temperature and less than or equal to the upper limit value of the target evaporation temperature, that is, within the target evaporation temperature range, determining the opening degree of the electronic expansion valve corresponding to the current evaporation temperature according to the first opening degree and the second opening degree;

[0068] The first opening degree is the opening degree of the electronic expansion valve determined at the current moment according to the suction superheat of the compressor; the second opening degree is the opening degree of the electronic expansion valve determined at the current moment according to the current evaporation temperature of the compressor.

[0069] The first opening is the opening of the electronic expansion valve obtained by the normal operation control of the compressor at the current moment. For example, the suction superheat at the current moment is detected. If the suction superheat at the current moment is greater than the target superheat, the opening of the electronic expansion valve is increased to reach the target superheat. At this time, the first opening of the electronic expansion valve at the current moment can be obtained.

[0070] Similarly, the second opening is the opening of the electronic expansion valve obtained according to the high temperature operation control of the compressor at the current moment. For example, the current evaporation temperature is detected. If the current evaporation temperature is equal to the upper limit of the target evaporation temperature, the opening of the electronic expansion valve is maintained unchanged, and the second opening of the electronic expansion valve at the current moment can be obtained.

[0071] According to one embodiment of the present invention, the step of determining the opening degree of the electronic expansion valve corresponding to the current evaporation temperature according to the first opening degree and the second opening degree includes:

[0072] The opening degree of the electronic expansion valve corresponding to the current evaporation temperature is determined by weighting the first opening degree and the second opening degree.

[0073] According to an embodiment of the present invention, the weighting method may be linear weighting.

[0074] The control method of the air conditioner provided by the embodiment of the present invention, when the current evaporating temperature of the compressor is within the target evaporating temperature range, the valve opening of the compressor high-temperature operation control is weighted by the valve opening of the compressor normal operation control, and the weighting method is linear, so that the electronic expansion valve can achieve the purpose of smooth transition regulation when switching between the normal operation control of the compressor and the high-temperature operation control of the compressor. This method can effectively avoid the situation where the valve fluctuates too much when switching between the normal operation control and the high-temperature operation control, thereby reducing the impact on stability.

[0075] According to one embodiment of the present invention, the step of determining the opening degree of the electronic expansion valve corresponding to the current evaporation temperature specifically includes:

[0076]

[0077] Among them, x is the opening of the electronic expansion valve corresponding to the current evaporating temperature, m is the first opening, n is the second opening, B is the upper limit value of the target evaporating temperature, C is the lower limit value of the target evaporating temperature, and D is the current evaporating temperature of the compressor.

[0078] The embodiment of the present invention can accurately determine the opening value of the electronic expansion valve within the target evaporation temperature range, avoid the electronic expansion valve from fluctuating back and forth, and improve stability.

[0079] The control method of the air conditioner provided by the present invention is described below with reference to a specific example, which generally includes: normal operation control of the compressor and high temperature operation control of the compressor, wherein the target evaporation temperature range is 20-22°C.

[0080] (1) Normal operation control of the compressor: When the current evaporation temperature D of the compressor is less than 20°C, the opening of the electronic expansion valve is controlled by the suction superheat.

[0081] Specifically, when the suction superheat of the compressor is greater than the target superheat, the opening of the electronic expansion valve is increased; when it is determined that the suction superheat of the compressor is equal to the target superheat, the opening of the electronic expansion valve is maintained; when the suction superheat of the compressor is less than the target superheat, the opening of the electronic expansion valve is reduced.

[0082] Therefore, the control method of the air conditioner provided in the embodiment of the present invention can control the opening of the electronic expansion valve according to the suction superheat of the compressor when the compressor is operating normally, thereby improving the operating reliability of the compressor and ensuring the heat exchange effect of the air conditioner.

[0083] (2) Compressor high temperature operation control: The current evaporation temperature D of the compressor is ≥ 20°C. At this time, the opening of the electronic expansion valve is controlled by the evaporation temperature.

[0084] Specifically, when D>22°C, the opening of the electronic expansion valve is reduced;

[0085] When D = 22°C, maintain the opening of the electronic expansion valve;

[0086] When 20≤D<22℃, increase the opening of the electronic expansion valve.

[0087] Moreover, when 20≤D≤22℃, the valve opening obtained according to the current evaporation temperature of the compressor is linearly weighted by the valve opening obtained according to the compressor suction superheat at the current moment. This can enable the electronic expansion valve to achieve the purpose of smooth transition regulation when switching between normal operation control of the compressor and high-temperature operation control of the compressor. This method can effectively avoid excessive valve fluctuations when switching between normal operation control and high-temperature operation control, thereby reducing the impact on stability.

[0088] Therefore, the control method of the air conditioner provided by the embodiment of the present invention can achieve the purpose of not exceeding the use range of the compressor by gradually weighting or even completely controlling the opening of the electronic expansion valve based on the evaporation temperature when the air conditioner is running at high temperature.

[0089] The control device of the air conditioner provided by the present invention is described below. The control device of the air conditioner described below and the control method of the air conditioner described above can be referred to each other.

[0090] According to an embodiment of the second aspect of the present invention, referring to Figure 4 As shown, the present invention also provides a control device for an air conditioner, mainly comprising: a detection module 410 and a control module 420. The detection module 410 is used to detect the current evaporation temperature of the compressor of the air conditioner; the control module 420 is used to determine whether the current evaporation temperature of the compressor is greater than or equal to the lower limit of the target evaporation temperature, and control the opening of the electronic expansion valve of the air conditioner according to the current evaporation temperature of the compressor.

[0091] The control device of the air conditioner provided in the embodiment of the present invention detects the current evaporating temperature of the compressor of the air conditioner through the detection module 410. When the current evaporating temperature of the compressor is greater than or equal to the lower limit of the target evaporating temperature, it indicates that the compressor is operating at a high temperature. Then, according to the current evaporating temperature of the compressor, the opening of the electronic expansion valve of the air conditioner is controlled through the control module 420 to adjust the current evaporating temperature. This can avoid the phenomenon that the evaporating temperature exceeds the operating range when the compressor is operating at a high temperature, thereby avoiding damage to the compressor and improving the stability and reliability of the air conditioner operation.

[0092] According to an embodiment of the third aspect of the present invention, referring to Figure 5As shown, the present invention also provides an air conditioner, which may include: a processor 510, a communication interface 520, a memory 530 and a communication bus 540, wherein the processor 510, the communication interface 520 and the memory 530 communicate with each other through the communication bus 540. The processor 510 may call the logic instructions in the memory 530 to execute a control method for the air conditioner, the method comprising: detecting the current evaporation temperature of the compressor of the air conditioner; determining that the current evaporation temperature of the compressor is greater than or equal to the lower limit of the target evaporation temperature, and controlling the opening of the electronic expansion valve of the air conditioner according to the current evaporation temperature of the compressor.

[0093] In addition, the logic instructions in the above-mentioned memory 530 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0094] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the air conditioner control method provided by the above-mentioned methods, which includes: detecting the current evaporating temperature of the compressor of the air conditioner; determining that the current evaporating temperature of the compressor is greater than or equal to the lower limit of the target evaporating temperature, and controlling the opening of the electronic expansion valve of the air conditioner according to the current evaporating temperature of the compressor.

[0095] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the control method of the air conditioner provided by the above-mentioned methods, the method comprising: detecting the current evaporating temperature of the compressor of the air conditioner; determining that the current evaporating temperature of the compressor is greater than or equal to the lower limit value of the target evaporating temperature, and controlling the opening of the electronic expansion valve of the air conditioner according to the current evaporating temperature of the compressor.

[0096] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0097] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: include: Detecting the current evaporation temperature of the air conditioner compressor; It is determined that the current evaporation temperature of the compressor is greater than or equal to a target evaporation temperature lower limit value, and the opening degree of the electronic expansion valve of the air conditioner is controlled according to the current evaporation temperature of the compressor.

2. The air conditioner control method according to claim 1, characterized in that: The step of controlling the opening of the electronic expansion valve of the air conditioner according to the current evaporation temperature of the compressor specifically comprises: Determining that the current evaporation temperature of the compressor is greater than the target evaporation temperature upper limit value, and reducing the opening of the electronic expansion valve; Determining that the current evaporation temperature of the compressor is equal to the target evaporation temperature upper limit value, and maintaining the opening of the electronic expansion valve; Determine that the current evaporation temperature of the compressor is greater than or equal to a target evaporation temperature lower limit value and less than a target evaporation temperature upper limit value, and increase the opening of the electronic expansion valve.

3. The air conditioner control method according to claim 1, characterized in that: Also includes: It is determined that the current evaporation temperature of the compressor is less than a lower limit of a target evaporation temperature, and the opening of an electronic expansion valve of the air conditioner is controlled according to the suction superheat of the compressor.

4. The control method of the air conditioner according to claim 3, characterized in that: The step of controlling the opening of the electronic expansion valve of the air conditioner according to the suction superheat of the compressor specifically comprises: Determining that the suction superheat of the compressor is greater than a target superheat, and increasing the opening of the electronic expansion valve; Determining that the suction superheat of the compressor is equal to the target superheat, and maintaining the opening of the electronic expansion valve; It is determined that the suction superheat of the compressor is less than the target superheat, and the opening of the electronic expansion valve is reduced.

5. The air conditioner control method according to claim 3, characterized in that: Also includes: When the current evaporation temperature of the compressor is greater than or equal to the target evaporation temperature lower limit value and less than or equal to the target evaporation temperature upper limit value, determining the opening degree of the electronic expansion valve corresponding to the current evaporation temperature according to the first opening degree and the second opening degree; The first opening degree is the opening degree of the electronic expansion valve determined at the current moment according to the suction superheat of the compressor, and the second opening degree is the opening degree of the electronic expansion valve determined at the current moment according to the current evaporation temperature of the compressor.

6. The air conditioner control method according to claim 5, characterized in that: The step of determining the opening degree of the electronic expansion valve corresponding to the current evaporation temperature according to the first opening degree and the second opening degree comprises: The opening degree of the electronic expansion valve corresponding to the current evaporation temperature is determined by weighting the first opening degree and the second opening degree.

7. The air conditioner control method according to claim 6, characterized in that: The weighting method is linear weighting.

8. The air conditioner control method according to any one of claims 5 to 7, characterized in that: The step of determining the opening degree of the electronic expansion valve corresponding to the current evaporation temperature specifically includes: Among them, x is the opening of the electronic expansion valve corresponding to the current evaporating temperature, m is the first opening, n is the second opening, B is the upper limit value of the target evaporating temperature, C is the lower limit value of the target evaporating temperature, and D is the current evaporating temperature of the compressor.

9. A control device for an air conditioner, characterized in that: include: A detection module, used for detecting the current evaporation temperature of the compressor of the air conditioner; The control module is used to determine whether the current evaporation temperature of the compressor is greater than or equal to the lower limit of the target evaporation temperature, and control the opening of the electronic expansion valve of the air conditioner according to the current evaporation temperature of the compressor.

10. An air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the air conditioner control method according to any one of claims 1 to 8 is implemented.

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