Control method and device of electronic expansion valve of air conditioner, air conditioner

Abstract

This invention discloses a control method and device for an electronic expansion valve in an air conditioner, as well as the air conditioner itself. The method includes: after the air conditioner receives a start command, controlling the electronic expansion valve to adjust its opening according to a first opening update cycle within a first predetermined time period; after the first predetermined time period has elapsed, acquiring the current exhaust temperature of the air conditioner; determining the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature; determining a second opening update cycle for the electronic expansion valve based on the relationship between the exhaust temperature difference and various exhaust temperature difference ranges; and controlling the electronic expansion valve to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period. This invention solves the technical problem in related technologies where the control method for the opening of the electronic expansion valve lacks addressing its update cycle and prevention of exhaust fluctuations, resulting in inaccurate adjustment and low reliability of the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of home appliance control technology, and more specifically, to a control method and device for an electronic expansion valve of an air conditioner, and an air conditioner. Background Technology

[0002] Electronic expansion valves, as a new type of control component, are widely used in air conditioning refrigerant circulation systems. By adjusting the opening degree of the electronic expansion valve, the amount of refrigerant circulating in the system can be regulated to meet the performance and reliability requirements of the air conditioning system. Therefore, how to effectively control the electronic expansion valve is a key factor in evaluating the reliability of an air conditioning system.

[0003] In existing technologies, the opening degree of the electronic expansion valve can be controlled using a PID algorithm, with the opening degree control achieved based on the exhaust temperature. However, existing control technologies only provide PID parameter values, which means calculating the expansion valve opening adjustment amount, without effectively controlling the expansion valve adjustment update cycle and the adjustment control to prevent exhaust fluctuations. This adjustment method is inaccurate, cannot meet users' increasingly higher comfort requirements for air conditioning, and cannot guarantee the reliability of air conditioning operation.

[0004] The aforementioned technologies, which control the opening of the electronic expansion valve, do not address its update cycle or prevent exhaust fluctuations, resulting in inaccurate adjustment methods and low reliability of the air conditioner. Currently, no effective solution has been proposed. Summary of the Invention

[0005] This invention provides a control method and device for the electronic expansion valve of an air conditioner, and an air conditioner in general, to at least solve the technical problem in the related art that the method of controlling the opening of the electronic expansion valve does not address its update cycle and anti-exhaust fluctuation, resulting in inaccurate adjustment and low reliability of the air conditioner.

[0006] According to one aspect of the present invention, a control method for an electronic expansion valve of an air conditioner is provided, comprising: after the air conditioner receives a start command, controlling the electronic expansion valve of the air conditioner to adjust its opening degree according to a first opening degree update cycle within a first predetermined time period, wherein the first predetermined time period is the time from when the air conditioner begins to respond to the start command to when the exhaust temperature change rate of the air conditioner is less than a threshold value; after the first predetermined time period is reached, acquiring the current exhaust temperature of the air conditioner; determining the exhaust temperature difference between the current exhaust temperature and a target exhaust temperature; determining a second opening degree update cycle of the electronic expansion valve according to the relationship between the exhaust temperature difference and various exhaust temperature difference ranges; and controlling the electronic expansion valve to adjust its opening degree according to the second opening degree update cycle for a second predetermined time period after the first predetermined time period.

[0007] Optionally, before determining the second opening update cycle of the electronic expansion valve based on the relationship between the exhaust temperature difference and each exhaust temperature difference range, the control method of the electronic expansion valve of the air conditioner further includes: determining the outdoor ambient temperature of the air conditioner; and determining each of the exhaust temperature difference ranges based on the outdoor ambient temperature.

[0008] Optionally, determining each of the exhaust temperature difference ranges based on the outdoor ambient temperature includes: when the outdoor ambient temperature is greater than a predetermined ambient temperature, determining the exhaust temperature difference range as a first exhaust temperature difference range; when the outdoor ambient temperature is not greater than the predetermined ambient temperature, determining the exhaust temperature difference range as a second exhaust temperature difference range, wherein the first exhaust temperature difference range is greater than the second exhaust temperature difference range.

[0009] Optionally, the second opening update cycle of the electronic expansion valve is determined based on the relationship between the exhaust temperature difference and each exhaust temperature difference range, including: when it is determined that the air conditioner is in the exhaust temperature rising stage and the exhaust temperature difference is within the first exhaust temperature difference range, the second opening update cycle is determined to be the second first update cycle; when it is determined that the air conditioner is in the exhaust temperature falling stage and the exhaust temperature difference range is within the second exhaust temperature difference range, the second opening update cycle is determined to be the second second update cycle, wherein the second first update cycle is greater than the second second update cycle.

[0010] Optionally, controlling the electronic expansion valve to adjust its opening according to the second opening update cycle for a second predetermined period after the first predetermined period includes one of the following: controlling the electronic expansion valve to increase its opening or not operate within the second predetermined period according to the second first update cycle and a predetermined number of steps; or controlling the electronic expansion valve to decrease its opening or not operate within the second predetermined period according to the second first update cycle and a predetermined number of steps.

[0011] Optionally, after controlling the electronic expansion valve to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period, the control method for the electronic expansion valve of the air conditioner further includes: after the second predetermined time period has elapsed, continuing to collect the current exhaust temperature of the air conditioner; when it is determined that the air conditioner is in the exhaust temperature drop phase, and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within a third exhaust temperature difference range, controlling the electronic expansion valve to adjust its opening according to the third opening update cycle for a third predetermined time period after the second predetermined time period, wherein, during the third opening update... During the cycle, the opening of the electronic expansion valve decreases or remains inactive according to a predetermined number of steps. When it is determined that the air conditioner is in the exhaust temperature rising stage, and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within the fourth exhaust temperature difference range, the electronic expansion valve is controlled to adjust its opening according to the fourth opening update cycle for a third predetermined time period after the second predetermined time period. The fourth exhaust temperature difference range is smaller than the third exhaust temperature difference range, and the third opening update cycle is larger than the fourth opening update cycle. During the fourth opening update cycle, the opening of the electronic expansion valve increases or remains inactive according to a predetermined number of steps.

[0012] Optionally, the control method for the electronic expansion valve of the air conditioner further includes: after the third predetermined time period has elapsed, if it is detected that the opening degree of the electronic expansion valve has increased, then the opening degree of the electronic expansion valve continues to be adjusted according to the third opening degree update cycle; if it is detected that the opening degree of the electronic expansion valve has decreased, then the opening degree of the electronic expansion valve continues to be adjusted according to the fourth opening degree update cycle.

[0013] According to another aspect of the present invention, a control device for an electronic expansion valve of an air conditioner is also provided, comprising: a first control unit, configured to control the electronic expansion valve of the air conditioner to adjust its opening degree according to a first opening degree update cycle within a first predetermined time period after the air conditioner receives a start command, wherein the first predetermined time period is the time from when the air conditioner begins to respond to the start command to when the exhaust temperature change rate of the air conditioner is less than a threshold value; a data acquisition unit, configured to acquire the current exhaust temperature of the air conditioner after the first predetermined time period has elapsed; a first determination unit, configured to determine the exhaust temperature difference between the current exhaust temperature and a target exhaust temperature; a second determination unit, configured to determine a second opening degree update cycle of the electronic expansion valve based on the relationship between the exhaust temperature difference and various exhaust temperature difference ranges; and a second control unit, configured to control the electronic expansion valve to adjust its opening degree according to the second opening degree update cycle within a second predetermined time period after the first predetermined time period.

[0014] Optionally, the control device for the electronic expansion valve of the air conditioner further includes: a third determining unit, used to determine the outdoor ambient temperature of the air conditioner before determining the second opening update cycle of the electronic expansion valve based on the relationship between the exhaust temperature difference and each exhaust temperature difference range; and a fourth determining unit, used to determine each of the exhaust temperature difference ranges based on the outdoor ambient temperature.

[0015] Optionally, the fourth determining unit includes: a first determining module, configured to determine the exhaust temperature difference range as a first exhaust temperature difference range when the outdoor ambient temperature is greater than a predetermined ambient temperature; and a second determining module, configured to determine the exhaust temperature difference range as a second exhaust temperature difference range when the outdoor ambient temperature is not greater than the predetermined ambient temperature, wherein the first exhaust temperature difference range is greater than the second exhaust temperature difference range.

[0016] Optionally, the second determining unit includes: a third determining module, configured to determine the second opening degree update cycle as a second first update cycle when it is determined that the air conditioner is in the exhaust temperature rising stage and the exhaust temperature difference is within the first exhaust temperature difference range; and a fourth determining module, configured to determine the second opening degree update cycle as a second second update cycle when it is determined that the air conditioner is in the exhaust temperature falling stage and the exhaust temperature difference range is within the second exhaust temperature difference range, wherein the second first update cycle is greater than the second second update cycle.

[0017] Optionally, the second control unit includes one of the following: a first control module, configured to control the electronic expansion valve to increase its opening or remain inactive within the second predetermined time period according to the second first update cycle and a predetermined number of steps; and a second control module, configured to control the electronic expansion valve to decrease its opening or remain inactive within the second predetermined time period according to the second first update cycle and a predetermined number of steps.

[0018] Optionally, the control device for the electronic expansion valve of the air conditioner further includes: the acquisition unit, which is further configured to, after controlling the electronic expansion valve to adjust its opening according to the second opening update cycle for a second predetermined time period following the first predetermined time period, continue to acquire the current exhaust temperature of the air conditioner after the second predetermined time period has elapsed; and the third control unit, which is configured to, when determining that the air conditioner is in the exhaust temperature decreasing phase and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within the third exhaust temperature difference range, control the electronic expansion valve to adjust its opening according to the third opening update cycle for a third predetermined time period following the second predetermined time period, wherein, in the second predetermined time period... Within the three-stage opening update cycle, the opening of the electronic expansion valve decreases or remains inactive according to a predetermined number of steps; the fourth control unit is used to control the electronic expansion valve to adjust its opening according to the fourth opening update cycle for a third predetermined time period after the second predetermined time period when it is determined that the air conditioner is in the exhaust temperature rising stage and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within the fourth exhaust temperature difference range. The fourth exhaust temperature difference range is smaller than the third exhaust temperature difference range, and the third opening update cycle is larger than the fourth opening update cycle. Within the fourth opening update cycle, the opening of the electronic expansion valve increases or remains inactive according to a predetermined number of steps.

[0019] Optionally, the control device for the electronic expansion valve of the air conditioner further includes: a fifth control unit, configured to, after the third predetermined time period has elapsed, if the opening degree of the electronic expansion valve is detected to have increased, continue to adjust the opening degree of the electronic expansion valve according to the third opening degree update cycle; and a sixth control unit, configured to, if the opening degree of the electronic expansion valve is detected to have decreased, continue to adjust the opening degree of the electronic expansion valve according to the fourth opening degree update cycle.

[0020] According to another aspect of the present invention, an air conditioner is also provided, which uses the control method of the electronic expansion valve of any of the above-described air conditioners.

[0021] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the control method for the electronic expansion valve of any of the above-described air conditioners.

[0022] According to another aspect of the present invention, a processor is also provided, the processor being configured to run a program, wherein the program, when running, executes the control method for the electronic expansion valve of any of the above-described air conditioners.

[0023] In this embodiment of the invention, after the air conditioner receives a start command, the electronic expansion valve of the air conditioner is controlled to adjust its opening according to a first opening update cycle within a first predetermined time period. The first predetermined time period is the time from when the air conditioner starts responding to the start command until the air conditioner's exhaust temperature change rate is less than the exhaust temperature change rate threshold. After the first predetermined time period is reached, the current exhaust temperature of the air conditioner is collected; the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is determined; a second opening update cycle of the electronic expansion valve is determined based on the relationship between the exhaust temperature difference and each exhaust temperature difference range; and the electronic expansion valve is controlled to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period. The present invention achieves the goal of controlling the renewal cycle of the expansion valve through partitioning, enabling the air conditioning system to quickly cool or heat during the initial exhaust phase, and ensuring stable operation of the air conditioner by adjusting the renewal cycle of the electronic expansion valve during the stable exhaust phase. It can precisely adjust the electronic expansion valve of the air conditioner, thereby improving the service life of the air conditioner and enhancing its operational reliability. This solves the technical problem in related technologies where the method of controlling the opening of the electronic expansion valve does not address its renewal cycle and exhaust fluctuation prevention, resulting in inaccurate adjustment methods and low operational reliability of the air conditioner. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a hardware structure block diagram of a mobile terminal for a control method of an electronic expansion valve of an air conditioner according to an embodiment of the present invention.

[0026] Figure 2 This is a flowchart of a control method for an electronic expansion valve of an air conditioner according to an embodiment of the present invention;

[0027] Figure 3 This is a flowchart of an optional control method for an electronic expansion valve of an air conditioner according to an embodiment of the present invention;

[0028] Figure 4 This is a flowchart of another optional control method for the electronic expansion valve of an air conditioner according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the control device for the electronic expansion valve of an air conditioner according to an embodiment of the present invention. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] As described in the background section, the existing technologies for controlling the opening of electronic expansion valves do not address their update cycle and prevention of exhaust fluctuations, resulting in inaccurate adjustment methods and low reliability of the air conditioner. To address these shortcomings, this invention provides a method and apparatus for controlling the electronic expansion valve of an air conditioner, as well as an air conditioner itself.

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] The methods and embodiments provided in this invention can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a control method of the electronic expansion valve of an air conditioner according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0035] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the control method of the electronic expansion valve of the air conditioner in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-described networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the above-described networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0036] According to an embodiment of the present invention, a method embodiment for controlling the electronic expansion valve of an air conditioner is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0037] Figure 2 This is a flowchart of a control method for an electronic expansion valve in an air conditioner according to an embodiment of the present invention, such as... Figure 2 As shown, the method for controlling the electronic expansion valve of an air conditioner includes the following steps:

[0038] Step S202: After the air conditioner receives the start command, the electronic expansion valve of the air conditioner is controlled to adjust its opening degree according to the first opening degree update cycle within a first predetermined time period. The first predetermined time period is the time from when the air conditioner starts responding to the start command to when the air conditioner's exhaust temperature change rate is less than the exhaust temperature change rate threshold.

[0039] Optionally, the first predetermined duration mentioned above is the initial exhaust phase of the air conditioner.

[0040] Optionally, the aforementioned electronic expansion valve is used to control the flow rate of refrigerant in the air conditioner's pipeline, that is, to regulate the refrigerant flow rate in the pipeline.

[0041] Optionally, the aforementioned first opening update cycle is the update frequency of the electronic expansion valve opening when the air conditioner is in the initial exhaust rising stage.

[0042] In this embodiment, when the user controls the air conditioner to start via remote control or voice control command, the air conditioner is in the initial exhaust rising stage. That is, during the first predetermined time t0 when the air conditioner compressor is turned on, the opening degree of the electronic expansion valve is updated once according to the first opening degree update cycle t1.

[0043] By updating the electronic expansion valve every t1 during the initial exhaust rise phase, the exhaust of the air conditioning system is rapidly increased, resulting in efficient cooling and heating and improved comfort.

[0044] Step S204: After the first predetermined time has elapsed, the current exhaust temperature of the air conditioner is collected.

[0045] In this embodiment, after the initial exhaust rise phase ends, a stable exhaust phase begins. During this phase, the electronic expansion valve selects a reasonable update cycle based on the absolute value range of the target exhaust temperature difference.

[0046] In this embodiment, the exhaust temperature sensed by the temperature sensor located at the compressor exhaust port can be obtained to obtain the current exhaust temperature of the air conditioner.

[0047] Step S206: Determine the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature.

[0048] In this embodiment, the electronic expansion valve selects a reasonable replacement cycle based on the range of the "absolute value of the target exhaust temperature difference". The larger the "absolute value of the target exhaust temperature difference", the farther the exhaust is from the target exhaust, and the faster the expansion valve needs to be replaced; conversely, the closer the exhaust is to the target exhaust, the slower the expansion valve is replaced. This can effectively solve the problem of exhaust fluctuation and system oscillation caused by rapid replacement of the expansion valve in low-temperature environments, ensuring user comfort and extending the service life of the air conditioner; see "Electronic Expansion Valve Replacement Cycle" for details.

[0049] In this embodiment, the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature can be determined, thereby determining the opening update cycle of the electronic expansion valve based on the exhaust temperature difference.

[0050] In this embodiment of the invention, the exhaust temperature Td can be collected throughout the process by the controller. Based on the trend of exhaust temperature change, combined with the exhaust temperature and the target exhaust temperature difference range, the temperature difference range can be selected according to different types of air conditioners and load changes in air conditioner usage scenarios to adapt to different operating conditions and perform target exhaust temperature stability control, thereby achieving precise and stable adjustment of the expansion valve opening and ensuring system reliability.

[0051] Step S208: Determine the second opening update cycle of the electronic expansion valve based on the relationship between the exhaust temperature difference and each exhaust temperature difference range.

[0052] In this embodiment, the opening update cycle of the electronic expansion valve during the stable exhaust phase t2 (i.e., the second predetermined duration) can be determined based on the relationship between the exhaust temperature difference and each exhaust temperature range.

[0053] Step S210: The electronic expansion valve is controlled to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period.

[0054] In this embodiment, the opening of the electronic expansion valve can be adjusted according to the second opening update cycle determined above during the stable exhaust phase.

[0055] As described above, in this embodiment of the invention, after the air conditioner receives the start command, the electronic expansion valve of the air conditioner is controlled to adjust its opening according to a first opening update cycle within a first predetermined time period. The first predetermined time period is the time from when the air conditioner starts responding to the start command until the air conditioner's exhaust temperature change rate is less than the exhaust temperature change rate threshold. After the first predetermined time period, the current exhaust temperature of the air conditioner is collected; the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is determined; based on the relationship between the exhaust temperature difference and each exhaust temperature difference range, a second opening update cycle of the electronic expansion valve is determined; the electronic expansion valve is controlled to adjust its opening according to the second opening update cycle for the second predetermined time period after the first predetermined time period. This achieves the goal of controlling the update cycle of the expansion valve through a zone control, enabling the air conditioning system to quickly cool or heat during the initial exhaust phase, and ensuring stable operation of the air conditioner during the stable exhaust phase through the adjustment of the electronic expansion valve update cycle. This allows for precise adjustment of the air conditioner's electronic expansion valve, achieving the technical effect of extending the service life of the air conditioner and improving its operational reliability.

[0056] Therefore, the technical solution provided by the embodiments of the present invention solves the technical problem in the related art that the method of controlling the opening of the electronic expansion valve does not address its update cycle and prevent exhaust fluctuations, resulting in inaccurate adjustment and low reliability of the air conditioner.

[0057] According to the above embodiments of the present invention, before determining the second opening update cycle of the electronic expansion valve based on the relationship between the exhaust temperature difference and each exhaust temperature difference range, the control method of the electronic expansion valve of the air conditioner further includes: determining the outdoor ambient temperature of the air conditioner; and determining each exhaust temperature difference range based on the outdoor ambient temperature.

[0058] In this embodiment, the exhaust temperature difference range can be determined based on the outdoor ambient temperature. For example, when the outdoor ambient temperature is high, i.e., when the outdoor environment is under high-temperature conditions, the exhaust temperature can respond quickly to the action of the electronic expansion valve. In this case, a larger exhaust temperature difference range can be selected, indicating that the exhaust is closer to the target exhaust temperature, allowing the air conditioner to quickly reach the target exhaust temperature and operate stably, achieving the goal of rapid cooling and heating. When the outdoor ambient temperature is low, i.e., when the outdoor environment is under low-temperature conditions, the exhaust temperature response has a certain lag due to the influence of ambient cold radiation. In this case, a smaller exhaust temperature difference range can be selected, indicating that the exhaust is farther from the target value. This allows the air conditioner to enter the stability control stage earlier, solving the problem of exhaust fluctuations and system oscillations caused by the rapid replacement of the expansion valve in low-temperature environments, ensuring user comfort and extending the service life of the air conditioner.

[0059] In the above embodiments, determining each exhaust temperature difference range based on the outdoor ambient temperature includes: when the outdoor ambient temperature is greater than a predetermined ambient temperature, determining the exhaust temperature difference range as a first exhaust temperature difference range; when the outdoor ambient temperature is not greater than the predetermined ambient temperature, determining the exhaust temperature difference range as a second exhaust temperature difference range, wherein the first exhaust temperature difference range is greater than the second exhaust temperature difference range.

[0060] In this embodiment, when the outdoor temperature is high, the exhaust temperature can respond quickly to the action of the electronic expansion valve, so T1 and T2 can be selected to a larger value, that is, the first exhaust temperature difference range; conversely, T1 and T2 can be selected to a smaller value, that is, the second exhaust temperature difference range.

[0061] In the above embodiments, the second opening update cycle of the electronic expansion valve is determined according to the relationship between the exhaust temperature difference and each exhaust temperature difference range. This includes: when it is determined that the air conditioner is in the exhaust temperature rising stage and the exhaust temperature difference is within the first exhaust temperature difference range, the second opening update cycle is determined to be the second first update cycle; when it is determined that the air conditioner is in the exhaust temperature falling stage and the exhaust temperature difference range is within the second exhaust temperature difference range, the second opening update cycle is determined to be the second second update cycle, wherein the second first update cycle is greater than the second second update cycle.

[0062] In this embodiment, the exhaust temperature stage of the air conditioner can be determined first, for example, whether the air conditioner is currently in the exhaust rising stage or the exhaust falling stage.

[0063] Figure 3This is a flowchart of an optional control method for an electronic expansion valve in an air conditioner according to an embodiment of the present invention, such as... Figure 3 As shown, the controller collects the exhaust temperature Td. If it detects that the exhaust temperature is rising (Td ≥ Td-1) and the difference between the exhaust temperature and the target exhaust temperature falls within the temperature range Td-Td0 ∈ [T1, T2] (T1 and T2 are not constant values ​​and are related to the operating conditions), then the electronic expansion valve can only open wider or remain inactive within time t2 (i.e., 1.1). Next, the controller collects the exhaust temperature Td. If it detects that the exhaust temperature is falling (Td < Td-1) and the difference between the exhaust temperature and the target exhaust temperature falls within the temperature range Td-Td0 ∈ [T3, T4], then the electronic expansion valve can only close narrower or remain inactive within time t2. After time t2, the controller exits the exhaust temperature stability control and no longer determines the entry conditions. Similarly, T3 and T4 can be selected according to different types of air conditioners and load changes in the air conditioner usage scenario. Smaller values ​​are taken in high-temperature environments (indicating that the exhaust is closer to the target value), and larger values ​​are taken in low-temperature environments (indicating that the exhaust is farther from the target value) (i.e., 1.2).

[0064] It should be noted that in this embodiment of the invention, T4 > T3 > 0 > T2 > T1; Td0 is the target exhaust; Td is the current exhaust; and Td-1 is the exhaust at the previous moment. T1, T2, T3, and T4 are not constant values ​​and are related to the type of air conditioning and the ambient temperature.

[0065] As can be seen from the above, the electronic expansion valve is controlled to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period, including one of the following: within the second predetermined time period, the electronic expansion valve is controlled to increase its opening or not operate according to the second first update cycle and a predetermined number of steps; within the second predetermined time period, the electronic expansion valve is controlled to decrease its opening or not operate according to the second first update cycle and a predetermined number of steps.

[0066] In this embodiment, the controller collects the exhaust temperature Td. If it detects that the exhaust temperature is rising, i.e., Td ≥ Td-1, and the difference between the exhaust temperature and the target exhaust temperature falls within the temperature range Td-Td0 ∈ [T1, T2] (T1 and T2 are not constant values ​​and are related to the operating conditions), then the electronic expansion valve can only open wider or remain inactive within the time t2. If the controller collects the exhaust temperature Td, and it detects that the exhaust temperature is falling, i.e., Td < Td-1, and the difference between the exhaust temperature and the target exhaust temperature falls within the temperature range Td-Td0 ∈ [T3, T4], then the electronic expansion valve can only close narrower or remain inactive within the time t2.

[0067] Table 1 shows the relationship between the absolute value of the target exhaust temperature difference and each exhaust temperature range, and the corresponding relationship between the expansion valve (electronic expansion valve) opening update cycle.

[0068] Table 1

[0069]

[0070] In other words, Table 1 above represents the stable exhaust phase, where the electronic expansion valve opening cycle is updated according to Table 1 after the compressor starts for time t0.

[0071] Where △t5<△t4<△t3<△t2<△t1<△t0,T4>T3>0>T2>T1; Td0 is the target exhaust; Td is the current exhaust, Td-1 is the exhaust at the previous moment; T1, T2, T3, and T4 are not constant values ​​and are related to the air conditioning type and ambient temperature; T5>0>T6; Td0 is the target exhaust; T5 and T6 are not constant values ​​and are related to the air conditioning type and ambient temperature; T5 is selected as a smaller value in high-temperature environments and a larger value in low-temperature environments; T6 is selected as a smaller value in low-temperature environments and a larger value in high-temperature environments.

[0072] In addition, Table 2 shows one optional data set. The optional data sets for T1, T2, T3, T4, T5, T6, and △T1, △T2, △T3, △T4, △T5 are shown in Table 2 below.

[0073] Table 2

[0074]

[0075] The values ​​mentioned above are merely illustrative recommendations and may be adjusted based on experimental results.

[0076] Through the above embodiments, during the initial exhaust rise stage, the electronic expansion valve is updated once every t1, which can quickly increase the system exhaust, achieve efficient cooling and heating, and improve comfort; during the stable exhaust stage, the target exhaust temperature can be stabilized by adapting to different operating conditions based on the exhaust temperature change trend and the exhaust temperature difference range with the target exhaust temperature, thus achieving preliminary adjustment.

[0077] By adjusting the replacement cycle of the aforementioned electronic expansion valve, the air conditioner can operate stably, improving user comfort and extending its service life.

[0078] Furthermore, in order to adapt to different operating conditions based on the changing trend of exhaust temperature and the range of the difference between the exhaust temperature and the target exhaust temperature, excessive overshoot of the target exhaust temperature is controlled to achieve closed-loop stable regulation. In this embodiment of the invention, through target exhaust temperature stability control and excessive overshoot control, rapid cooling and heating in high-temperature environments and stable output in low-temperature environments are achieved. Precise and stable adjustment of the expansion valve opening throughout the entire process ensures stable system operation, guarantees system reliability, and extends the service life of the air conditioner. A detailed explanation follows.

[0079] According to the above embodiments of the present invention, after the electronic expansion valve is controlled to adjust its opening according to a second opening update cycle for a second predetermined time period following a first predetermined time period, the control method of the electronic expansion valve of the air conditioner further includes: after the second predetermined time period is reached, continuing to collect the current exhaust temperature of the air conditioner; when it is determined that the air conditioner is in the exhaust temperature decreasing stage and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within a third exhaust temperature difference range, controlling the electronic expansion valve to adjust its opening according to a third predetermined time period following a second predetermined time period, wherein the opening of the electronic expansion valve decreases or remains inactive according to a predetermined number of steps within the third opening update cycle; when it is determined that the air conditioner is in the exhaust temperature increasing stage and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within a fourth exhaust temperature difference range, controlling the electronic expansion valve to adjust its opening according to a fourth opening update cycle for a third predetermined time period following a second predetermined time period, wherein the fourth exhaust temperature difference range is smaller than the third exhaust temperature difference range, and the third opening update cycle is larger than the fourth opening update cycle, wherein the opening of the electronic expansion valve increases or remains inactive according to a predetermined number of steps within the fourth opening update cycle.

[0080] In this embodiment, exhaust temperature stability control is exited after time t2, and the entry condition is no longer determined thereafter; Figure 4 This is a flowchart of another optional control method for the electronic expansion valve of an air conditioner according to an embodiment of the present invention, such as... Figure 4 As shown, at this time, the controller collects the exhaust temperature Td and performs the target exhaust temperature stability control in 1.2. If the exhaust temperature is detected to be decreasing, i.e., Td < Td-1, and the difference between the exhaust temperature and the target exhaust temperature falls within the temperature range Td-Td0≥T5, then the electronic expansion valve can only close slightly or not operate for time t2 (2.1); after time t2, the target exhaust temperature overshoot control is exited; if the expansion valve opening is increased again, i.e., P2 > P1, it can be determined again whether the entry condition in 2.1 is met.

[0081] In addition, when the controller collects the exhaust temperature Td and has executed the target exhaust temperature stability control in 1.1, if the exhaust temperature is detected to be rising, i.e., Td≥Td-1, and the difference between the exhaust temperature and the target exhaust temperature falls within the temperature range Td-Td0≤T6, then the electronic expansion valve can only open wide or remain inactive within time t2; after time t2, it exits the target exhaust temperature overshoot control (2.2); if the expansion valve opening closes again, i.e., P2<P1, it can be determined again whether the entry condition in 2.2 is met.

[0082] In the above embodiments, the control method of the electronic expansion valve of the air conditioner further includes: after the third predetermined time period is reached, if it is detected that the opening degree of the electronic expansion valve has increased, then the opening degree of the electronic expansion valve is adjusted according to the third opening degree update cycle; if it is detected that the opening degree of the electronic expansion valve has decreased, then the opening degree of the electronic expansion valve is adjusted according to the fourth opening degree update cycle.

[0083] In this embodiment, such as Figure 4 As shown, the target exhaust temperature overshoot control is exited after time t2; if the expansion valve opening increases again, i.e., P2 > P1, it can be determined again whether the entry condition of 2.1 is met. In addition, the target exhaust temperature overshoot control is exited after time t2 (2.2); if the expansion valve opening decreases again, i.e., P2 < P1, it can be determined again whether the entry condition of 2.2 is met.

[0084] Where T5 > 0 > T6; Td0 is the target exhaust; P2 is the current opening degree, and P1 is the opening degree at the previous moment; T5 and T6 are not constant values ​​and are related to the air conditioning type and ambient temperature; T5 is selected as a smaller value in high temperature environments and a larger value in low temperature environments; T6 is selected as a smaller value in low temperature environments and a larger value in high temperature environments.

[0085] The technical solution provided by the above embodiments of the present invention enables segmented control of the expansion valve update cycle; and based on the changing trend of exhaust temperature, combined with the range of exhaust temperature difference with the target exhaust temperature to adapt to different operating conditions, it performs target exhaust temperature stability control to achieve preliminary adjustment; furthermore, based on the changing trend of exhaust temperature, combined with the range of exhaust temperature difference with the target exhaust temperature to adapt to different operating conditions, it performs target exhaust temperature overshoot control to achieve closed-loop stable adjustment, ensuring stable operation of the air conditioning system, guaranteeing system reliability, and extending the service life of the air conditioner.

[0086] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0087] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0088] According to embodiments of the present invention, a control device for the electronic expansion valve of an air conditioner for implementing the above-described control method for the electronic expansion valve of an air conditioner is also provided. Figure 5 This is a schematic diagram of the control device for the electronic expansion valve of an air conditioner according to an embodiment of the present invention, as shown below. Figure 5 As shown, the device includes: a first control unit 51, a data acquisition unit 53, a first determination unit 55, a second determination unit 57, and a second control unit 59. The control device for the electronic expansion valve of this air conditioner will be described in detail below.

[0089] The first control unit 51 is used to control the electronic expansion valve of the air conditioner to adjust its opening degree according to a first opening degree update cycle within a first predetermined time period after the air conditioner receives the start command. The first predetermined time period is the time from when the air conditioner starts responding to the start command to when the air conditioner's exhaust temperature change rate is less than the exhaust temperature change rate threshold.

[0090] The data acquisition unit 53 is used to acquire the current exhaust temperature of the air conditioner after the first predetermined time period has elapsed.

[0091] The first determining unit 55 is used to determine the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature.

[0092] The second determining unit 57 is used to determine the second opening update cycle of the electronic expansion valve based on the relationship between the exhaust temperature difference and each exhaust temperature difference range.

[0093] The second control unit 59 is used to control the electronic expansion valve to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period.

[0094] It should be noted that the first control unit 51, the acquisition unit 53, the first determination unit 55, the second determination unit 57 and the second control unit 59 mentioned above correspond to steps S202 to S210 in the above embodiments. The five units and the corresponding steps implement the same instances and application scenarios, but are not limited to the content disclosed in the above embodiments.

[0095] As can be seen from the above, in the solution described in the above embodiments of the present invention, the first control unit can control the electronic expansion valve of the air conditioner to adjust its opening degree according to the first opening degree update cycle within a first predetermined time period after the air conditioner receives the start command. The first predetermined time period is the time from when the air conditioner starts responding to the start command to when the air conditioner's exhaust temperature change rate is less than the exhaust temperature change rate threshold. Then, the acquisition unit acquires the current exhaust temperature of the air conditioner after the first predetermined time period has elapsed. Next, the first determination unit determines the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature. The second determination unit determines the second opening degree update cycle of the electronic expansion valve based on the relationship between the exhaust temperature difference and the range of exhaust temperature differences. The second control unit controls the electronic expansion valve to adjust its opening degree according to the second opening degree update cycle within the second predetermined time period after the first predetermined time period. This achieves the purpose of controlling the update cycle of the expansion valve through the partition end, enabling the air conditioning system to quickly cool or heat during the initial exhaust stage, and ensuring stable operation of the air conditioner through the adjustment of the electronic expansion valve update cycle during the stable exhaust stage. It can precisely adjust the electronic expansion valve of the air conditioner, achieving the technical effect of improving the service life of the air conditioner and improving the operational reliability of the air conditioner.

[0096] Therefore, the technical solution provided by the embodiments of the present invention solves the technical problem in the related art that the method of controlling the opening of the electronic expansion valve does not address its update cycle and prevent exhaust fluctuations, resulting in inaccurate adjustment and low reliability of the air conditioner.

[0097] Optionally, the control device for the electronic expansion valve of the air conditioner further includes: a third determining unit, used to determine the outdoor ambient temperature of the air conditioner before determining the second opening update cycle of the electronic expansion valve based on the relationship between the exhaust temperature difference and each exhaust temperature difference range; and a fourth determining unit, used to determine each exhaust temperature difference range based on the outdoor ambient temperature.

[0098] Optionally, the fourth determining unit includes: a first determining module, used to determine the exhaust temperature difference range as a first exhaust temperature difference range when the outdoor ambient temperature is greater than the predetermined ambient temperature; and a second determining module, used to determine the exhaust temperature difference range as a second exhaust temperature difference range when the outdoor ambient temperature is not greater than the predetermined ambient temperature, wherein the first exhaust temperature difference range is greater than the second exhaust temperature difference range.

[0099] Optionally, the second determining unit includes: a third determining module, used to determine a second opening degree update cycle as a second first update cycle when it is determined that the air conditioner is in the exhaust temperature rising stage and the exhaust temperature difference is within the first exhaust temperature difference range; and a fourth determining module, used to determine a second opening degree update cycle as a second second update cycle when it is determined that the air conditioner is in the exhaust temperature falling stage and the exhaust temperature difference range is within the second exhaust temperature difference range, wherein the second first update cycle is greater than the second second update cycle.

[0100] Optionally, the second control unit includes one of the following: a first control module, configured to control the electronic expansion valve to increase its opening or remain inactive according to a second first update cycle and a predetermined number of steps within a second predetermined time period; and a second control module, configured to control the electronic expansion valve to decrease its opening or remain inactive according to a second first update cycle and a predetermined number of steps within a second predetermined time period.

[0101] Optionally, the control device for the electronic expansion valve of the air conditioner further includes: a data acquisition unit, further configured to, after controlling the electronic expansion valve to adjust its opening according to a second opening update cycle for a second predetermined time period following a first predetermined time period, continue to acquire the current exhaust temperature of the air conditioner after the second predetermined time period has elapsed; and a third control unit, configured to, when determining that the air conditioner is in the exhaust temperature decreasing phase and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within a third exhaust temperature difference range, control the electronic expansion valve to adjust its opening according to a third opening update cycle for a third predetermined time period following a second predetermined time period, wherein, in the second predetermined time period... Within the three-stage opening update cycle, the opening of the electronic expansion valve decreases or remains inactive according to a predetermined number of steps; the fourth control unit is used to control the electronic expansion valve to adjust its opening according to the fourth opening update cycle for a third predetermined time period after the second predetermined time period when it is determined that the air conditioner is in the exhaust temperature rising stage and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within the fourth exhaust temperature difference range. The fourth exhaust temperature difference range is smaller than the third exhaust temperature difference range, and the third opening update cycle is larger than the fourth opening update cycle. Within the fourth opening update cycle, the opening of the electronic expansion valve increases or remains inactive according to a predetermined number of steps.

[0102] Optionally, the control device for the electronic expansion valve of the air conditioner further includes: a fifth control unit, which, after a third predetermined time period has elapsed, if the opening degree of the electronic expansion valve is detected to have increased, continues to adjust the opening degree of the electronic expansion valve according to a third opening degree update cycle; and a sixth control unit, which, if the opening degree of the electronic expansion valve is detected to have decreased, continues to adjust the opening degree of the electronic expansion valve according to a fourth opening degree update cycle.

[0103] According to another aspect of the present invention, an air conditioner is also provided, wherein the air conditioner uses the control method of the electronic expansion valve of any of the above-described air conditioners.

[0104] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the control method of the electronic expansion valve of the air conditioner according to any of the above embodiments.

[0105] Optionally, in this embodiment, the computer-readable storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any communication device in a group of communication devices.

[0106] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: after the air conditioner receives a start command, controlling the air conditioner's electronic expansion valve to adjust its opening according to a first opening update cycle within a first predetermined time period, wherein the first predetermined time period is the time from when the air conditioner starts responding to the start command to when the air conditioner's exhaust temperature change rate is less than the exhaust temperature change rate threshold; after the first predetermined time period is reached, collecting the air conditioner's current exhaust temperature; determining the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature; determining a second opening update cycle for the electronic expansion valve based on the relationship between the exhaust temperature difference and each exhaust temperature difference range; controlling the electronic expansion valve to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period.

[0107] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: determining the outdoor ambient temperature of the air conditioner; and determining the range of exhaust temperature differences based on the outdoor ambient temperature.

[0108] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the outdoor ambient temperature is greater than a predetermined ambient temperature, determining the exhaust temperature difference range as a first exhaust temperature difference range; when the outdoor ambient temperature is not greater than the predetermined ambient temperature, determining the exhaust temperature difference range as a second exhaust temperature difference range, wherein the first exhaust temperature difference range is greater than the second exhaust temperature difference range.

[0109] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when it is determined that the air conditioner is in the exhaust temperature rising stage and the exhaust temperature difference is within the first exhaust temperature difference range, a second opening degree update cycle is determined as a second first update cycle; when it is determined that the air conditioner is in the exhaust temperature falling stage and the exhaust temperature difference range is within the second exhaust temperature difference range, a second opening degree update cycle is determined as a second second update cycle, wherein the second first update cycle is greater than the second second update cycle.

[0110] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: controlling the electronic expansion valve to increase its opening or remain inactive according to a second predetermined time period and a predetermined number of updates; controlling the electronic expansion valve to decrease its opening or remain inactive according to a second predetermined time period and a predetermined number of updates.

[0111] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: after the second predetermined time period has elapsed, the current exhaust temperature of the air conditioner continues to be collected; when it is determined that the air conditioner is in the exhaust temperature decreasing phase and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within the third exhaust temperature difference range, the electronic expansion valve is controlled to adjust its opening according to the third opening update cycle for the third predetermined time period after the second predetermined time period, wherein the opening of the electronic expansion valve decreases or remains inactive according to the predetermined number of steps within the third opening update cycle; when it is determined that the air conditioner is in the exhaust temperature increasing phase and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within the fourth exhaust temperature difference range, the electronic expansion valve is controlled to adjust its opening according to the fourth opening update cycle for the third predetermined time period after the second predetermined time period, wherein the fourth exhaust temperature difference range is smaller than the third exhaust temperature difference range, and the third opening update cycle is larger than the fourth opening update cycle, wherein the opening of the electronic expansion valve increases or remains inactive according to the predetermined number of steps within the fourth opening update cycle.

[0112] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: after a third predetermined time period has elapsed, if it is detected that the opening degree of the electronic expansion valve has increased, then the opening degree of the electronic expansion valve is adjusted according to a third opening degree update cycle; if it is detected that the opening degree of the electronic expansion valve has decreased, then the opening degree of the electronic expansion valve is adjusted according to a fourth opening degree update cycle.

[0113] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes the control method of the electronic expansion valve of any of the above-described air conditioners.

[0114] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0115] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0116] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0117] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0118] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0119] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0120] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method for an electronic expansion valve in an air conditioner, characterized in that, include: After the air conditioner receives the start command, the electronic expansion valve of the air conditioner is controlled to adjust its opening degree according to the first opening degree update cycle within a first predetermined time period. The first predetermined time period is the time from when the air conditioner starts responding to the start command to when the exhaust temperature change rate of the air conditioner is less than the exhaust temperature change rate threshold. After the first predetermined time period has elapsed, the current exhaust temperature of the air conditioner is collected; Determine the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature; Based on the relationship between the exhaust temperature difference and each exhaust temperature difference range, the second opening update cycle of the electronic expansion valve is determined. When the outdoor ambient temperature of the air conditioner is greater than the predetermined ambient temperature, the exhaust temperature difference range is determined as the first exhaust temperature difference range; when the outdoor ambient temperature is not greater than the predetermined ambient temperature, the exhaust temperature difference range is determined as the second exhaust temperature difference range, and the first exhaust temperature difference range is greater than the second exhaust temperature difference range. The electronic expansion valve is controlled to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period.

2. The control method for the electronic expansion valve of an air conditioner according to claim 1, characterized in that, Based on the relationship between the exhaust temperature difference and each exhaust temperature difference range, the second opening update cycle of the electronic expansion valve is determined, including: When it is determined that the air conditioner is in the exhaust temperature rising stage and the exhaust temperature difference is within the first exhaust temperature difference range, the second opening degree update cycle is determined to be the second update cycle. When it is determined that the air conditioner is in the stage of exhaust temperature decrease and the exhaust temperature difference range is the second exhaust temperature difference range, the second opening degree update cycle is determined to be the second second update cycle, wherein the second first update cycle is greater than the second second update cycle.

3. The control method for the electronic expansion valve of an air conditioner according to claim 2, characterized in that, Controlling the electronic expansion valve to adjust its opening degree according to the second opening degree update cycle for a second predetermined time period after the first predetermined time period includes one of the following: Within the second predetermined time period, the electronic expansion valve is controlled to increase its opening degree or remain inactive according to the second first update cycle and a predetermined number of steps. Within the second predetermined time period, the electronic expansion valve is controlled to reduce its opening or remain inactive according to the second first update cycle and a predetermined number of steps.

4. The control method for the electronic expansion valve of an air conditioner according to claim 1, characterized in that, After controlling the electronic expansion valve to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period, the method further includes: After the second predetermined time period is reached, the current exhaust temperature of the air conditioner will continue to be collected; When it is determined that the air conditioner is in the exhaust temperature drop phase and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within the third exhaust temperature difference range, the electronic expansion valve is controlled to adjust its opening according to the third opening update cycle for the third predetermined time after the second predetermined time. During the third opening update cycle, the opening of the electronic expansion valve decreases or does not operate according to a predetermined number of steps. When it is determined that the air conditioner is in the exhaust temperature rising stage, and the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature is within the fourth exhaust temperature difference range, the electronic expansion valve is controlled to adjust its opening according to the fourth opening update cycle for a third predetermined time period after the second predetermined time period. The fourth exhaust temperature difference range is smaller than the third exhaust temperature difference range, and the third opening update cycle is larger than the fourth opening update cycle. During the fourth opening update cycle, the opening of the electronic expansion valve increases or does not operate according to a predetermined number of steps.

5. The control method for the electronic expansion valve of an air conditioner according to claim 4, characterized in that, Also includes: If, after the third predetermined time period has elapsed, the opening of the electronic expansion valve is detected to have increased, the opening of the electronic expansion valve will continue to be adjusted according to the third opening update cycle. If the opening of the electronic expansion valve is detected to be smaller, the opening of the electronic expansion valve will continue to be adjusted according to the fourth opening update cycle.

6. A control device for an electronic expansion valve of an air conditioner, characterized in that, The control method applied to any one of claims 1 to 5 includes: The first control unit is used to control the electronic expansion valve of the air conditioner to adjust its opening degree according to a first opening degree update cycle within a first predetermined time period after the air conditioner receives the start command. The first predetermined time period is the time from when the air conditioner starts responding to the start command to when the exhaust temperature change rate of the air conditioner is less than the exhaust temperature change rate threshold. The data acquisition unit is used to acquire the current exhaust temperature of the air conditioner after the first predetermined time period has elapsed; The first determining unit is used to determine the exhaust temperature difference between the current exhaust temperature and the target exhaust temperature; The second determining unit is used to determine the second opening update cycle of the electronic expansion valve based on the relationship between the exhaust temperature difference value and each exhaust temperature difference range. When the outdoor ambient temperature of the air conditioner is greater than a predetermined ambient temperature, the exhaust temperature difference range is determined to be the first exhaust temperature difference range; when the outdoor ambient temperature is not greater than the predetermined ambient temperature, the exhaust temperature difference range is determined to be the second exhaust temperature difference range, wherein the first exhaust temperature difference range is greater than the second exhaust temperature difference range. The second control unit is used to control the electronic expansion valve to adjust its opening according to the second opening update cycle for a second predetermined time period after the first predetermined time period.

7. An air conditioner, characterized in that, The air conditioner uses the control method of the electronic expansion valve of the air conditioner as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program executes the control method for the electronic expansion valve of the air conditioner according to any one of claims 1 to 5.

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