Electronic expansion valve control method, system and device and storage medium

Abstract

The invention relates to the technical field of air conditioners, particularly provides an electronic expansion valve control method, system and device and a storage medium, and aims at solving the technical problem that in the prior art, an electronic expansion valve is poor in regulation and control efficiency. In order to achieve the purpose, the electronic expansion valve control method comprises the steps that the current step number value of an electronic expansion valve, the target step number value of the electronic expansion valve and the maximum step number limiting value of the electronic expansion valve are obtained; according to the current step number value, the target step number value and the maximum step number limiting value, the adjusting speed corresponding to each sub-stage for adjusting the electronic expansion valve is determined; and the electronic expansion valve is controlled to sequentially execute adjustment of each sub-stage at the corresponding adjustment speed until all the sub-stages are executed. According to the method, the electronic expansion valve is adjusted by stages, each stage corresponds to different adjusting speeds, through the setting, the sudden change of the temperature can be avoided, and the electronic expansion valve is rapidly and accurately adjusted to the target step value on the premise.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and specifically provides an electronic expansion valve control method, system, control device and storage medium. Background Art

[0002] Electronic expansion valve is a device used to control the refrigerant flow in the refrigeration cycle. It is widely used in air conditioning, refrigeration and freezing systems to ensure that the system can operate efficiently under different load and temperature conditions.

[0003] Usually, due to the instability of the air conditioning system or the improper adjustment of the electronic expansion valve, it is easy to cause a sudden change in system temperature. In traditional technology, a capillary tube is generally added to the electronic expansion valve to avoid this problem as much as possible. However, adding a capillary tube will increase the complexity of the air conditioning system, resulting in increased costs and difficulties in subsequent maintenance. Moreover, if the size and length of the capillary tube are not selected properly, it will still cause temperature fluctuations.

[0004] Accordingly, the art requires a new electronic expansion valve control method, system, control device and storage medium solution to solve the above problems. Summary of the invention

[0005] In order to overcome at least one of the above-mentioned defects, the present invention is proposed to provide an electronic expansion valve control method, system, control device and storage medium that solve or at least partially solve the technical problem of poor control efficiency of electronic expansion valves in the prior art.

[0006] In a first aspect, the present invention provides an electronic expansion valve control method, the method comprising:

[0007] Acquire a current step value of the electronic expansion valve, a target step value of the electronic expansion valve, and a maximum step limit value of the electronic expansion valve;

[0008] Determining an adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit;

[0009] The electronic expansion valve is controlled to successively perform adjustment of each sub-stage at a corresponding adjustment speed until all sub-stages are completed.

[0010] In a technical solution of the above-mentioned electronic expansion valve control method, the “determining the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit value” includes:

[0011] According to the maximum step limit, the maximum adjustable range of the electronic expansion valve is divided into a plurality of sub-ranges;

[0012] According to a preset rule, setting the adjustment speed corresponding to each sub-interval;

[0013] Recording each sub-interval from the current step value to the target step value as each sub-stage of adjusting the electronic expansion valve;

[0014] The electronic expansion valve is controlled to successively perform adjustment of each sub-stage at a corresponding adjustment speed until all sub-stages are completed.

[0015] In a technical solution of the above electronic expansion valve control method, the adjustment speed V corresponding to the nth sub-interval is in the order of increasing step value. n The value is less than the adjustment speed V corresponding to the n+1th sub-interval n+1 , wherein n≥1.

[0016] In a technical solution of the above-mentioned electronic expansion valve control method, the “determining the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit value” includes:

[0017] Determining an adjustment speed U1 corresponding to a first sub-stage of adjusting the electronic expansion valve according to the current step value and the maximum step limit;

[0018] According to the adjustment speed U1 corresponding to the first sub-stage, the current step value and the target step value, the adjustment speed U corresponding to each remaining sub-stage of adjusting the electronic expansion valve is determined. m , said m≥2.

[0019] In a technical solution of the above-mentioned electronic expansion valve control method, the "determining the adjustment speed U1 corresponding to each of the remaining sub-stages for adjusting the electronic expansion valve according to the adjustment speed U1 corresponding to the first sub-stage, the current step value and the target step value" m "include:

[0020] Determine the magnitude relationship between the current step value and the target step value;

[0021] According to the judgment result, the adjustment speed U corresponding to each of the remaining sub-stages is determined. m ;

[0022] In a technical solution of the above-mentioned electronic expansion valve control method, the "determining, according to the judgment result, the adjustment speed U corresponding to each of the remaining sub-stages" m "include:

[0023] If the current step value is less than the target step value, the adjustment speed U corresponding to the xth sub-stage in the remaining sub-stages is set x Less than the adjustment speed U corresponding to the x+1th sub-stage x+1 ;

[0024] If the current step value is greater than the target step value, the adjustment speed U corresponding to the yth sub-stage in the remaining sub-stages is set y Greater than the adjustment speed U corresponding to the y+1th sub-stage y+1 .

[0025] In a technical solution of the above electronic expansion valve control method, the “until all the sub-stages are completed” includes:

[0026] Get the updated current step value;

[0027] Determining whether the updated current step value is equal to the target step value;

[0028] If so, it is determined that all the sub-stages are completed.

[0029] In a second aspect, the present invention provides an electronic expansion valve control system, the system comprising:

[0030] an acquisition module, the acquisition module being configured to acquire a current step value of the electronic expansion valve, a target step value of the electronic expansion valve, and a maximum step limit value of the electronic expansion valve;

[0031] an analysis module, the analysis module being configured to determine an adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit;

[0032] An execution module is configured to control the electronic expansion valve to sequentially perform adjustment of each sub-stage at a corresponding adjustment speed until all sub-stages are completed.

[0033] In a third aspect, a control device is provided, which includes a processor and a storage device, wherein the storage device is suitable for storing multiple program codes, and the program codes are suitable for being loaded and run by the processor to execute the electronic expansion valve control method described in any one of the technical solutions of the above-mentioned electronic expansion valve control method.

[0034] In a fourth aspect, a computer-readable storage medium is provided, which stores a plurality of program codes, wherein the program codes are suitable for being loaded and run by a processor to execute the electronic expansion valve control method described in any one of the technical solutions of the above-mentioned electronic expansion valve control method.

[0035] The above one or more technical solutions of the present invention have at least one or more of the following beneficial effects:

[0036] In the technical solution of the present invention, the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve is determined according to the current step value, the target step value and the maximum step limit. The electronic expansion valve is adjusted in stages, and each stage corresponds to a different adjustment speed. Through such a setting, abrupt changes in temperature can be avoided, and the electronic expansion valve can be quickly and accurately adjusted to the target step value under this premise.

[0037] Further, in the technical solution of the present invention, according to the maximum step limit of the electronic expansion valve, the step value is divided into sub-intervals from the minimum to the maximum, and then a special adjustment speed is set for each sub-interval according to a preset rule, and the difference between the current step value and the target step value falls in which sub-intervals, and finally the corresponding sub-interval is recorded as the sub-stage for adjusting the electronic expansion valve. Through such a setting, it is equivalent to setting the adjustment sub-stage and the adjustment speed of each sub-stage for the electronic expansion valve in advance. Before the adjustment, it is only necessary to determine which sub-intervals the current step value and the target step value fall in, and then execute the adjustment process according to the set adjustment speed. The present invention makes the amount of data required to adjust the electronic expansion valve small and efficient.

[0038] Further, in the technical solution of the present invention, the adjustment speed U1 corresponding to the first sub-stage is determined according to the current step value and the maximum step limit. According to the maximum step limit, the position of the current step value in the adjustable range of the electronic expansion valve is judged. By such a setting, the problem of temperature jitter caused by a small current step value but a large adjustment speed, or low step adjustment efficiency caused by a large current step value but a small adjustment speed can be avoided.

[0039] Furthermore, in the technical solution of the present invention, if the current step value is less than the target step value, that is, the adjustment target is to increase the step value of the electronic expansion valve, then the adjustment speed of the next adjustment sub-stage is set to be greater than the adjustment speed of the previous adjustment sub-stage. Similarly, if the current step value is greater than the target step value, that is, the adjustment target is to reduce the step value of the electronic expansion valve, then the adjustment speed of the next adjustment sub-stage is set to be less than the adjustment speed of the previous adjustment sub-stage. Taking advantage of the fact that the adjustment is more sensitive when the step value is small and less sensitive when the step value is large, the adjustment speed is set to gradually increase from small to large when the step value of the electronic expansion valve is to be increased, and the adjustment speed is set to gradually slow down from large to small when the step value of the electronic expansion valve is to be reduced, thereby improving the adjustment efficiency while ensuring that the temperature does not change abruptly. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the figures are used to represent similar components, among which:

[0041] Figure 1 is a schematic flow chart of main steps of an electronic expansion valve control method according to an embodiment of the present invention;

[0042] Figure 2 It is a schematic flow chart of main steps for determining the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to an embodiment of the present invention;

[0043] Figure 3 is a schematic flow chart of main steps for determining an adjustment speed corresponding to each sub-stage of adjusting an electronic expansion valve according to another embodiment of the present invention;

[0044] Figure 4 It is a schematic diagram of the main structural block diagram of an electronic expansion valve control system according to an embodiment of the present invention.

[0045] Reference numerals list :

[0046] 11: Acquisition module; 12: Analysis module; 13: Execution module. DETAILED DESCRIPTION

[0047] Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0048] In the description of the present invention, "module" and "processor" may include hardware, software or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, and memories, and may also include software parts, such as program codes, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, hardware, or a combination of the two. Non-temporary computer-readable storage media include any suitable medium that can store program codes, such as a magnetic disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, and the like. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and / or B", and may include only A, only B, or A and B. The singular terms "one" and "the" may also include plural forms.

[0049] See also Figure 1 , Figure 1 FIG. 1 is a flow chart of the main steps of the electronic expansion valve control method according to an embodiment of the present invention. Figure 1 As shown, the electronic expansion valve control method provided by the present invention mainly includes steps S1 to S3:

[0050] Step S1, obtaining a current step value of the electronic expansion valve, a target step value of the electronic expansion valve, and a maximum step limit value of the electronic expansion valve.

[0051] In this embodiment, the current step value of the electronic expansion valve is the current opening and closing degree of the electronic expansion valve without any adjustment changes; the target step value of the electronic expansion valve is the step value that is ultimately desired to be achieved through this adjustment process; the maximum step limit of the electronic expansion valve is usually determined during the design and manufacturing stages, and its specific value is generally determined based on the needs and performance of the air-conditioning system, and is an inherent attribute parameter of the electronic expansion valve.

[0052] Step S2: determining the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit.

[0053] In this embodiment, the adjustment process of the electronic expansion valve is divided into several sub-stages and the adjustment speed corresponding to each sub-stage is determined, wherein each sub-stage generally refers to the stage of change of the step value. For example, in the process of adjusting the step value from 0 to 100, the adjustment process is divided into five sub-stages of 0-20, 21-40, 41-60, 61-80, and 81-100; the adjustment speed generally refers to the speed of adjusting the step value, which can be understood as the time required to adjust a step value.

[0054] Step S3, controlling the electronic expansion valve to sequentially perform the adjustment of each sub-stage at a corresponding adjustment speed until all sub-stages are completed.

[0055] In this embodiment, in the process of adjusting the electronic expansion valve from the current step value to the target step value, each sub-stage is sequentially experienced, and after entering any sub-stage, the adjustment speed is set to the adjustment speed corresponding to the sub-stage.

[0056] In this embodiment, the method for determining whether all sub-stages have been completed includes: obtaining the updated current step value; determining whether the updated current step value is equal to the target step value; if so, determining that all sub-stages have been completed. In this embodiment, if the updated current step value is equal to the target step value, it means that the adjustment of the electronic expansion valve has reached the step value to be adjusted, and it is determined that all sub-stages have been completed. Preferably, this scheme can also be applied to the verification of each sub-stage. For example, in the above 5 sub-stages, for the 0-20 sub-stage, it is determined whether the updated step value is equal to 20. If so, it proves that the sub-stage has been completed.

[0057] Based on the above steps S1 to S3, in the technical solution of the present invention, the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve is determined according to the current step value, the target step value and the maximum step limit. The electronic expansion valve is adjusted in stages, and each stage corresponds to a different adjustment speed. Through such a setting, abrupt changes in temperature can be avoided, and the electronic expansion valve can be quickly and accurately adjusted to the target step value under this premise.

[0058] See also Figure 2 , Figure 2 FIG. 1 is a flow chart of main steps for determining the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to an embodiment of the present invention. Figure 2 As shown, determining the adjustment speed corresponding to each word stage mainly includes steps S211 to S214:

[0059] Step S211: Divide the maximum adjustable range of the electronic expansion valve into a plurality of sub-ranges according to the maximum step limit.

[0060] Step S212: setting the adjustment speed corresponding to each sub-interval according to a preset rule.

[0061] Step S213: record each sub-interval from the current step value to the target step value as each sub-stage of adjusting the electronic expansion valve.

[0062] Step S214: Control the electronic expansion valve to perform the adjustment of each sub-stage successively at the corresponding adjustment speed until all sub-stages are completed.

[0063] In one embodiment, the maximum step limit of the electronic expansion valve is 500 steps, and the maximum adjustable range is divided into five intervals a, b, c, d, and e according to actual needs, wherein the step value corresponding to interval a is 0-50 steps, the step value corresponding to interval b is 51-100 steps, the step value corresponding to interval c is 101-150 steps, the step value corresponding to interval d is 151-200 steps, and the step value corresponding to interval e is 201-500 steps. The adjustment speed of each interval is set according to the rule of "the larger the step value, the greater the adjustment speed", that is, the time required for adjusting one step in each interval is set, wherein the time required for adjusting one step in interval a is T a is 10 seconds, and the time required to adjust one step in interval b is T b is 6 seconds, and the time required to adjust one step within the c interval is T c is 3 seconds, and the time required to adjust one step within the interval d is T d is 2 seconds, and the time required to adjust one step within the e interval is T e If the initial opening of the electronic expansion valve, i.e., the current step value, is 25 steps, and the target opening, i.e., the target step value, is 300 steps, then when the opening of the electronic expansion valve is controlled to increase from 25 steps to 51 steps, the time for increasing by 1 step is 10 seconds, when the opening of the electronic expansion valve is controlled to increase from 51 steps to 101 steps, the time for increasing by 1 step is 6 seconds, when the opening of the electronic expansion valve is controlled to increase from 101 steps to 151 steps, the time for increasing by 1 step is 3 seconds, when the opening of the electronic expansion valve is controlled to increase from 151 steps to 201 steps, the time for increasing by 1 step is 2 seconds, and when the opening of the electronic expansion valve is controlled to increase from 201 steps to 300 steps, the time for increasing by 1 step is 1 second.

[0064] Based on the above steps S211 to S214, in the technical solution of the present invention, according to the maximum step limit of the electronic expansion valve, the step value is divided into sub-intervals from the minimum to the maximum, and then a special adjustment speed is set for each sub-interval according to a preset rule, and the difference between the current step value and the target step value falls in which sub-intervals, and finally the corresponding sub-interval is recorded as a sub-stage for adjusting the electronic expansion valve. Through such a setting, it is equivalent to setting the adjustment sub-stage and the adjustment speed of each sub-stage for the electronic expansion valve in advance. Before the adjustment, it is only necessary to determine which sub-intervals the current step value and the target step value fall in, and then perform the adjustment process according to the set adjustment speed. The present invention makes the amount of data required to calculate the electronic expansion valve small and efficient.

[0065] See also Figure 3 , Figure 3 FIG. 1 is a flow chart of main steps for determining the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to another embodiment of the present invention. Figure 3 As shown, determining the adjustment speed corresponding to each word stage mainly includes steps S221 and S222:

[0066] Step S221: Determine the adjustment speed U1 corresponding to the first sub-stage of adjusting the electronic expansion valve according to the current step value and the maximum step limit.

[0067] Step S222: Determine the adjustment speed U1 corresponding to the first sub-stage, the current step value and the target step value for each of the remaining sub-stages of adjusting the sub-expansion valve. m , where m≥2.

[0068] In this embodiment, the step value can be divided from 0 to the maximum limit to determine each adjustment sub-stage according to the maximum step limit, or the current step value can be divided to the target step value to determine each adjustment sub-stage. The adjustment speed corresponding to each remaining sub-stage can be determined according to the difference between the current step value and the target step value, or the adjustment speed corresponding to each remaining sub-stage can be determined according to the quotient of the current step value and the target step value, which is not limited in this embodiment.

[0069] In one embodiment, the initial opening of the electronic expansion valve, i.e., the current step value, is obtained to be 300 steps, the target opening, i.e., the target step value, is obtained to be 25 steps, and the maximum step limit of the electronic expansion valve is 500 steps. First, the current step value is divided into the target step value to determine each adjustment sub-stage, and the first sub-stage is obtained to be 300-245 steps, the second sub-stage is 246-190, the third sub-stage is 189-135 steps, the fourth stage is 134-80 steps, and the fifth stage is 79-25 steps. It can be seen from the analysis that the current opening of 300 steps belongs to a relatively large opening state, so the adjustment speed U1 corresponding to the first sub-stage can be set to a relatively large value, which can be specifically expressed as the time required for adjusting one step is 1 second. Then, it is determined that the current step value 300 is greater than the target step value 25, that is, the adjustment target is to reduce the opening, then in the remaining sub-stages, the adjustment speed of the latter sub-stage is set to be lower than the adjustment speed of the previous sub-stage, that is, the adjustment speed gradually slows down. For example, the adjustment speed U2 of the second sub-stage can be specifically expressed as the time required for one step of adjustment is 2 seconds, the adjustment speed U3 of the third sub-stage can be specifically expressed as the time required for one step of adjustment is 3 seconds, the adjustment speed U4 of the fourth sub-stage can be specifically expressed as the time required for one step of adjustment is 6 seconds, and the adjustment speed U5 of the fifth sub-stage can be specifically expressed as the time required for one step of adjustment is 10 seconds.

[0070] Based on the above steps S221-S222, in the technical solution of the present invention, the adjustment speed U1 corresponding to the first sub-stage is determined according to the current step value and the maximum step limit. According to the maximum step limit, the position of the current step value in the adjustable range of the electronic expansion valve is determined. Through such a setting, the problem of temperature jitter caused by the current step value being small but the adjustment speed being large, or the current step value being large but the adjustment speed being small, resulting in low step adjustment efficiency, can be avoided. Further, if it is determined that the current step value is less than the target step value, that is, the adjustment target is to increase the step value of the electronic expansion valve, then the adjustment speed of the next adjustment sub-stage is set to be greater than the adjustment speed of the previous adjustment sub-stage. Similarly, if it is determined that the current step value is greater than the target step value, that is, the adjustment target is to reduce the step value of the electronic expansion valve, then the adjustment speed of the next adjustment sub-stage is set to be less than the adjustment speed of the previous adjustment sub-stage. Taking advantage of the fact that the adjustment is more sensitive when the step value is small and less sensitive when the step value is large, the adjustment speed is set to gradually increase from small to large when the step value of the electronic expansion valve is to be increased, and the adjustment speed is set to gradually slow down from large to small when the step value of the electronic expansion valve is to be reduced, thereby improving the adjustment efficiency while ensuring that the temperature does not change abruptly.

[0071] So far, the electronic expansion valve control method of the present invention has been described. It should be pointed out that although the various steps are described in a specific order in the above embodiment, those skilled in the art can understand that in order to achieve the effect of the present invention, different steps do not have to be performed in such an order, and they can be performed simultaneously (in parallel) or in other orders, and these changes are within the scope of protection of the present invention.

[0072] Furthermore, the present invention also provides an electronic expansion valve control system.

[0073] See attached Figure 4 , Figure 4 FIG. 1 is a main structural block diagram of an electronic expansion valve control system according to an embodiment of the present invention. Figure 4 As shown, the electronic expansion valve control system in the embodiment of the present invention mainly includes an acquisition module 11, an analysis module 12 and an execution module 13. In some embodiments, one or more of the acquisition module 11, the analysis module 12 and the execution module 13 can be combined into one module. In some embodiments, the acquisition module 11 can be configured to acquire the current step value of the electronic expansion valve, the target step value of the electronic expansion valve and the maximum step limit of the electronic expansion valve. The analysis module 12 can be configured to determine the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit. The execution module 13 can be configured to control the electronic expansion valve to perform the adjustment of each sub-stage one by one at the corresponding adjustment speed until all sub-stages are executed.

[0074] The electronic expansion valve control system is used to execute Figure 1 The electronic expansion valve control method embodiment shown in the figure has similar technical principles, technical problems solved and technical effects produced. Technicians in this technical field can clearly understand that for the convenience and conciseness of description, the specific working process and related instructions of the electronic expansion valve control system can refer to the contents described in the embodiment of the electronic expansion valve control method, which will not be repeated here.

[0075] It is understood by those skilled in the art that the present invention implements all or part of the processes in the method of the above embodiment, and can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device, medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electric carrier signal, telecommunication signal and software distribution medium that can carry the computer program code. It should be noted that the content contained in the computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media do not include electric carrier signals and telecommunication signals.

[0076] Furthermore, the present invention also provides a control device. In an embodiment of a control device according to the present invention, the control device includes a processor and a storage device, the storage device can be configured to store a program for executing the electronic expansion valve control method of the above method embodiment, and the processor can be configured to execute the program in the storage device, which includes but is not limited to the program for executing the electronic expansion valve control method of the above method embodiment. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The control device can be a control device device formed by various electronic devices.

[0077] Furthermore, the present invention also provides a computer-readable storage medium. In a computer-readable storage medium embodiment according to the present invention, the computer-readable storage medium can be configured to store a program for executing the electronic expansion valve control method of the above method embodiment, and the program can be loaded and run by a processor to implement the above electronic expansion valve control method. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The computer-readable storage medium can be a storage device formed by various electronic devices. Optionally, the computer-readable storage medium in the embodiment of the present invention is a non-temporary computer-readable storage medium.

[0078] Further, it should be understood that since the setting of each module is only for illustrating the functional units of the device of the present invention, the physical devices corresponding to these modules may be the processor itself, or a part of the software in the processor, a part of the hardware, or a part of the combination of software and hardware. Therefore, the number of each module in the figure is only schematic.

[0079] Those skilled in the art will appreciate that the modules in the device can be adaptively split or merged. Such splitting or merging of specific modules will not cause the technical solution to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or merging will fall within the protection scope of the present invention.

[0080] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An electronic expansion valve control method, characterized in that: The method comprises: Acquire a current step value of the electronic expansion valve, a target step value of the electronic expansion valve, and a maximum step limit value of the electronic expansion valve; Determining an adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit; The electronic expansion valve is controlled to successively perform adjustment of each sub-stage at a corresponding adjustment speed until all sub-stages are completed.

2. The electronic expansion valve control method according to claim 1, characterized in that: The “determining the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit value” includes: According to the maximum step limit, the maximum adjustable range of the electronic expansion valve is divided into a plurality of sub-ranges; According to a preset rule, setting the adjustment speed corresponding to each sub-interval; Recording each sub-interval from the current step value to the target step value as each sub-stage of adjusting the electronic expansion valve; The electronic expansion valve is controlled to successively perform adjustment of each sub-stage at a corresponding adjustment speed until all sub-stages are completed.

3. The electronic expansion valve control method according to claim 2, characterized in that: In the order of increasing step value, the adjustment speed V corresponding to the nth sub-interval n The value is less than the adjustment speed V corresponding to the n+1th sub-interval n+1 , wherein n≥1.

4. The electronic expansion valve control method according to claim 1, characterized in that: The “determining the adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit value” includes: Determining an adjustment speed U1 corresponding to a first sub-stage of adjusting the electronic expansion valve according to the current step value and the maximum step limit; According to the adjustment speed U1 corresponding to the first sub-stage, the current step value and the target step value, the adjustment speed U corresponding to each remaining sub-stage of adjusting the electronic expansion valve is determined. m , said m≥2.

5. The electronic expansion valve control method according to claim 4, characterized in that: The "determine the adjustment speed U1 corresponding to each of the remaining sub-stages for adjusting the electronic expansion valve according to the adjustment speed U1 corresponding to the first sub-stage, the current step value and the target step value m "include: Determine the magnitude relationship between the current step value and the target step value; According to the judgment result, the adjustment speed U corresponding to each of the remaining sub-stages is determined. m .

6. The electronic expansion valve control method according to claim 5, characterized in that: According to the judgment result, the adjustment speed U corresponding to each of the remaining sub-stages is determined. m "include: If the current step value is less than the target step value, the adjustment speed U corresponding to the xth sub-stage in the remaining sub-stages is set x Less than the adjustment speed U corresponding to the x+1th sub-stage x+1 ; If the current step value is greater than the target step value, the adjustment speed U corresponding to the yth sub-stage in the remaining sub-stages is set y Greater than the adjustment speed U corresponding to the y+1th sub-stage y+1 .

7. The electronic expansion valve control method according to any one of claims 1 to 6, characterized in that: The "until all the sub-stages are executed" includes: Get the updated current step value; Determining whether the updated current step value is equal to the target step value; If so, it is determined that all the sub-stages are completed.

8. An electronic expansion valve control system, characterized in that: The system comprises: an acquisition module, the acquisition module being configured to acquire a current step value of the electronic expansion valve, a target step value of the electronic expansion valve, and a maximum step limit value of the electronic expansion valve; an analysis module, the analysis module being configured to determine an adjustment speed corresponding to each sub-stage of adjusting the electronic expansion valve according to the current step value, the target step value and the maximum step limit; An execution module is configured to control the electronic expansion valve to sequentially perform adjustment of each sub-stage at a corresponding adjustment speed until all sub-stages are completed.

9. A control device, comprising a processor and a storage device, wherein the storage device is suitable for storing a plurality of program codes, characterized in that: The program code is suitable for being loaded and run by the processor to execute the electronic expansion valve control method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a plurality of program codes, characterized in that: The program code is suitable for being loaded and run by a processor to execute the electronic expansion valve control method according to any one of claims 1 to 7.

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