Electronic expansion valve opening control method, device, computer equipment and storage medium

Abstract

The present application relates to a method, apparatus, computer device, and storage medium for controlling the opening of an electronic expansion valve. The method comprises: determining initial opening data for the electronic expansion valve based on actual evaporator pressure data; determining target opening data for the electronic expansion valve based on the initial opening data and a preset opening range; and controlling the opening of the electronic expansion valve based on the target opening data. This method enables correction of the initial opening data using a preset opening range, thereby reducing the frequency of electronic expansion valve adjustment, ensuring that superheat remains within an appropriate range, improving air conditioning cooling performance, and reducing the effects of nonlinearity, time-varying effects, and hysteresis on the control accuracy of the electronic expansion valve opening, thereby improving the control accuracy of the electronic expansion valve opening.

Description

Technical Field

[0001] The present application relates to the technical field of automobile air-conditioning systems, and in particular to an electronic expansion valve opening control method, device, computer equipment, and storage medium. Background Art

[0002] A car's air conditioning system consists of a compressor, condenser, electronic expansion valve, and evaporator, all connected by refrigerant piping. The compressor compresses the low-temperature, low-pressure refrigerant gas from the evaporator into a high-temperature, high-pressure gas, which is then fed to the condenser. In the condenser, the high-temperature, high-pressure gas condenses into a higher-temperature, higher-pressure liquid, releasing a significant amount of heat to the atmosphere. After passing through the electronic expansion valve, the high-temperature, high-pressure refrigerant liquid expands in volume, its pressure and temperature drop dramatically, and it exits the valve in the form of mist (fine droplets). The mist enters the evaporator, where its boiling point is much lower than the temperature inside the evaporator, causing it to evaporate into gas. During the evaporation process, it absorbs a significant amount of ambient heat, thereby cooling the vehicle's battery. The low-temperature, low-pressure refrigerant vapor then enters the compressor.

[0003] The opening of the electronic expansion valve determines the amount of refrigerant mist entering the evaporator, directly affecting the evaporator's superheat. Therefore, by controlling the opening of the electronic expansion valve, the evaporator's superheat, and thus the refrigerant's cooling effect, is adjusted. To maintain the evaporator's superheat at the target superheat, the traditional method involves frequently changing the opening of the electronic expansion valve. This results in a high rate of damage to the electronic expansion valve, affecting the normal operation of the vehicle air conditioner. Summary of the Invention

[0004] Based on this, it is necessary to provide an electronic expansion valve opening control method, device, computer equipment and storage medium that can reduce the adjustment frequency of the electronic expansion valve to address the above technical problems.

[0005] In a first aspect, the present application provides a method for controlling the opening of an electronic expansion valve, the method comprising:

[0006] Determine the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator;

[0007] Determine the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range;

[0008] The opening of the electronic expansion valve is controlled according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0009] In one embodiment, controlling the opening of the electronic expansion valve according to target opening data includes:

[0010] If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in the same opening range, the opening of the electronic expansion valve is controlled to remain unchanged;

[0011] If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in different opening ranges, the electronic expansion valve is controlled to adjust its opening according to the target opening data.

[0012] In one embodiment, determining target opening data of the electronic expansion valve according to the initial opening data and the preset opening range includes:

[0013] Selecting a target opening interval from a plurality of preset opening intervals according to the initial opening data, and determining target marking information of the target opening interval; the target marking information is used to mark the order in which the target opening interval is arranged in the plurality of preset opening intervals;

[0014] The target opening data of the electronic expansion valve is determined according to the target mark information, the preset minimum opening data and the preset opening adjustment step.

[0015] In one embodiment, determining the target opening data of the electronic expansion valve according to the target mark information, the preset minimum opening data, and the preset opening adjustment step size includes:

[0016] According to the target mark information and the opening adjustment step, the opening lower limit data corresponding to the target opening range is determined;

[0017] The target opening data of the electronic expansion valve is determined based on the minimum opening data and the opening lower limit data.

[0018] In one embodiment, determining target marking information of a target opening range includes:

[0019] Determine the opening difference between the initial opening data and the minimum opening data;

[0020] The target mark information is determined based on the opening difference and the opening adjustment step size.

[0021] In one embodiment, before the step of determining the target opening data of the electronic expansion valve based on the initial opening data and the preset opening range, the method further includes:

[0022] The opening range between the preset minimum opening data and the maximum opening data is divided into a plurality of preset opening intervals according to the preset opening adjustment step.

[0023] In one embodiment, determining the initial opening data of the electronic expansion valve according to the actual pressure data of the evaporator includes:

[0024] Determine the actual superheat of the evaporator based on the actual pressure data of the evaporator;

[0025] The initial opening data of the electronic expansion valve is determined based on the actual superheat and the preset target superheat.

[0026] In one embodiment, determining the actual superheat of the electronic expansion valve according to actual pressure data of the evaporator includes:

[0027] According to the actual pressure data of the evaporator, determine the refrigerant saturation temperature and actual temperature data corresponding to the actual pressure data;

[0028] The difference between the actual temperature data and the refrigerant saturation temperature is determined as the actual superheat.

[0029] In one embodiment, determining initial opening data of the electronic expansion valve according to the actual superheat and the preset target superheat includes:

[0030] Determine the theoretical opening data of the electronic expansion valve based on the actual temperature data of the evaporator;

[0031] Determining the adjustment opening data of the electronic expansion valve according to the actual superheat and the difference between the actual superheat and the target superheat;

[0032] The initial opening data of the electronic expansion valve is determined based on the theoretical opening data and the adjusted opening data.

[0033] In a second aspect, the present application further provides an electronic expansion valve opening control device. The device comprises:

[0034] An initial opening determination module is used to determine the initial opening data of the electronic expansion valve according to the actual pressure data of the evaporator;

[0035] A target opening determination module is used to determine the target opening data of the electronic expansion valve according to the initial opening data and a preset opening range;

[0036] The opening adjustment module is used to control the opening of the electronic expansion valve according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0037] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are performed:

[0038] Determine the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator;

[0039] Determine the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range;

[0040] The opening of the electronic expansion valve is controlled according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0041] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the following steps:

[0042] Determine the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator;

[0043] Determine the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range;

[0044] The opening of the electronic expansion valve is controlled according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0045] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the following steps:

[0046] Determine the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator;

[0047] Determine the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range;

[0048] The opening of the electronic expansion valve is controlled according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0049] The above-mentioned electronic expansion valve opening control method, device, computer equipment and storage medium, after obtaining the initial opening data, determine the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range; control the opening of the electronic expansion valve according to the target opening data; in the above-mentioned method, if the initial opening data corresponding to multiple consecutive moments are in the same opening range, then within the time length corresponding to the consecutive moments, the opening of the electronic expansion valve is controlled by the same opening data, and the initial opening data is corrected by the preset opening range, thereby reducing the adjustment frequency of the electronic expansion valve, ensuring that the superheat is within an appropriate range, improving the air conditioning refrigeration effect, and reducing the influence of nonlinearity, time variation and hysteresis on the control accuracy of the electronic expansion valve opening, thereby improving the control accuracy of the electronic expansion valve opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 2. A diagram showing an application environment of a method for controlling the opening of an electronic expansion valve in one embodiment;

[0051] Figure 2 Schematic diagram of a flow chart of a method for controlling the opening of an electronic expansion valve in one embodiment;

[0052] Figure 3 A schematic diagram of a process for obtaining initial opening data in one embodiment;

[0053] Figure 4 A schematic diagram of a process for obtaining target opening data in another embodiment;

[0054] Figure 5 This is a structural block diagram of an electronic expansion valve opening control device in one embodiment;

[0055] Figure 6 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0057] The electronic expansion valve opening control method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other servers. The terminal 102 determines the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator; determines the target opening data of the electronic expansion valve based on the initial opening data and the preset opening range; and controls the opening of the electronic expansion valve according to the target opening data so that the actual superheat of the evaporator matches the target superheat. Among them, the terminal 102 can be, but is not limited to, various desktop computers, laptops, smart phones, tablets, Internet of Things devices and portable wearable devices. The Internet of Things devices can be smart air conditioners, smart car-mounted devices, etc. Portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The server 104 can be implemented as an independent server or a server cluster consisting of multiple servers.

[0058] In one embodiment, Figure 2 As shown, a method for controlling the opening of an electronic expansion valve is provided. Figure 1 The intelligent vehicle-mounted device in the example is used to illustrate the process, which includes the following steps:

[0059] Step 202: Determine the initial opening data of the electronic expansion valve according to the actual pressure data of the evaporator.

[0060] The initial opening data refers to the opening data required for the electronic expansion valve when the actual superheat of the evaporator matches the target superheat. The initial opening data is determined based on the superheat deviation between the actual superheat and the target superheat.

[0061] It is important to note that the actual superheat refers to the degree to which the steam temperature is higher than the saturation temperature at the corresponding pressure. The target superheat refers to the superheat corresponding to the maximum heat dissipation effect of the evaporator. The target superheat value range is 3°C-5°C.

[0062] It should be noted that: the traditional method is to determine the initial opening data of the electronic expansion valve based on the superheat of the condenser, compressor or heat exchanger. In this process, since the condenser, compressor or heat exchanger is not the component that directly processes the object to be cooled, the traditional method can only indirectly determine the initial opening data of the electronic expansion valve based on the superheat of the condenser, compressor or heat exchanger, resulting in low control accuracy of the electronic expansion valve. The embodiment of the present application is based on the embodiment of the present application based on the superheat of the evaporator to determine the initial opening data of the electronic expansion valve. In this process, the evaporator is in direct contact with the object to be cooled, which is a key step in taking away the object to be cooled. Therefore, the embodiment of the present application is based on the embodiment of the present application based on the superheat of the evaporator to directly determine the initial opening data of the electronic expansion valve, thereby avoiding the problem of low opening control accuracy of the electronic expansion valve due to heat loss of the refrigerant, thereby improving the control accuracy of the opening of the electronic expansion valve.

[0063] Specifically, the intelligent vehicle-mounted device determines the actual superheat of the evaporator based on the actual pressure data of the evaporator; and determines the initial opening data of the electronic expansion valve based on the actual superheat and a preset target superheat.

[0064] Step 204 : determining the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range.

[0065] Among them, the preset opening interval is determined based on the opening range between the minimum opening data and the maximum opening data of the electronic expansion valve. The traditional method directly controls the opening of the electronic expansion valve according to the initial opening data after obtaining the initial opening data of the electronic expansion valve. However, since the initial opening data is obtained based on the actual pressure data, and the actual pressure data changes all the time, the initial opening data also changes all the time, resulting in the opening of the electronic expansion valve needing to be adjusted frequently, which can easily cause damage to the electronic expansion valve. Therefore, after obtaining the initial opening data, the embodiment of the present application determines the target opening interval corresponding to the initial opening data in multiple preset opening intervals, and determines the preset opening data corresponding to the target opening interval as the target opening data of the electronic expansion valve; if the initial opening data corresponding to multiple consecutive moments are in the same opening interval, then within the time length corresponding to the consecutive moments, the opening of the electronic expansion valve is controlled with the same opening data, thereby reducing the frequency of opening adjustment of the electronic expansion valve.

[0066] For example, during the time period t1-t5, the initial opening data of the electronic expansion valve gradually increases and is 5%-9% respectively. The preset opening range is 2%-10%, and the preset opening data corresponding to the preset opening range is 2%. Then, the target opening data of the electronic expansion valve during the time period t1-t5 is 2%, that is, only one adjustment is required during the time period t1-t5, instead of adjustment at every moment. The opening adjustment frequency of the electronic expansion valve is reduced from 5 times to 1 time.

[0067] In addition, due to the strong nonlinearity, time-varying, and hysteresis in the transmission of actual pressure data to the intelligent vehicle-mounted device and the processing and determination of the target opening data of the electronic expansion valve by the intelligent vehicle-mounted device, the control accuracy of the electronic expansion valve opening is low. That is, the target opening data of the electronic expansion valve determined based on the actual pressure data collected at time t0 no longer meets the requirements of the current time t1. Therefore, after obtaining the initial opening data, the embodiment of the present application determines the target opening interval corresponding to the initial opening data in multiple preset opening intervals, and determines the preset opening data corresponding to the target opening interval as the target opening data of the electronic expansion valve. If the initial opening data corresponding to multiple consecutive moments are within the same opening interval, the opening of the electronic expansion valve is controlled using the same opening data within the time period corresponding to the consecutive moments, thereby reducing the impact of nonlinearity, time-varying, and hysteresis on the control accuracy of the electronic expansion valve opening, and improving the control accuracy of the electronic expansion valve opening.

[0068] Specifically, after obtaining the initial opening data, the intelligent vehicle-mounted device determines a target opening interval corresponding to the initial opening data among multiple preset opening intervals, and determines the preset opening data corresponding to the target opening interval as the target opening data of the electronic expansion valve.

[0069] Step 206 : Control the opening of the electronic expansion valve according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0070] Specifically, the intelligent vehicle-mounted device controls the opening of the electronic expansion valve according to the target opening data, adjusts the amount of refrigerant entering the evaporator, and then adjusts the actual superheat of the evaporator until the actual superheat matches the target superheat.

[0071] In the above-mentioned electronic expansion valve opening control method, after obtaining the initial opening data, the target opening data of the electronic expansion valve is determined according to the initial opening data and the preset opening interval; the opening of the electronic expansion valve is controlled according to the target opening data; in the above-mentioned method, if the initial opening data corresponding to multiple consecutive moments are in the same opening interval, then within the time length corresponding to the consecutive moments, the opening of the electronic expansion valve is controlled with the same opening data, and the initial opening data is corrected by the preset opening interval, thereby reducing the adjustment frequency of the electronic expansion valve, ensuring that the superheat is within an appropriate range, improving the air conditioning refrigeration effect, and reducing the influence of nonlinearity, time variation and hysteresis on the control accuracy of the electronic expansion valve opening, thereby improving the control accuracy of the electronic expansion valve opening.

[0072] In one embodiment, controlling the opening of the electronic expansion valve according to the target opening data includes:

[0073] If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in the same opening range, the opening of the electronic expansion valve is controlled to remain unchanged; if the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in different opening ranges, the electronic expansion valve is controlled to adjust the opening according to the target opening data.

[0074] Among them, unchanged refers to the opening of the electronic expansion valve corresponding to the previous moment. Since the actual pressure data is collected according to the sampling period, the actual pressure data collected at each sampling point needs to be calculated once for the initial opening data, that is, each sampling point corresponds to an initial opening data. The traditional method is to calculate an initial opening data at each sampling moment, and perform an electronic expansion valve opening control according to the initial opening data corresponding to each sampling moment. The opening of the electronic expansion valve is frequently adjusted, resulting in a high damage rate of the electronic expansion valve. The embodiment of the present application uses the opening interval to correct the initial opening data. If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in the same opening interval, the opening of the electronic expansion valve is controlled to remain unchanged; if the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in different opening intervals, the electronic expansion valve is controlled to adjust the opening according to the target opening data; the frequency of opening adjustment of the electronic expansion valve can be reduced.

[0075] In this embodiment, if the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in the same opening range, the opening of the electronic expansion valve is controlled to remain unchanged, thereby reducing the adjustment frequency of the electronic expansion valve, ensuring that the superheat is within an appropriate range, and improving the air conditioning cooling effect.

[0076] In one embodiment, Figure 3 As shown, the real-time process of determining the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator specifically includes the following steps:

[0077] Step 302: Determine the actual superheat of the evaporator based on the actual pressure data of the evaporator.

[0078] Actual pressure data is obtained through pressure sensors. Actual superheat refers to the degree to which the steam temperature exceeds the refrigerant's saturation temperature at the corresponding pressure. Refrigerant saturation temperature refers to the temperature threshold between liquid and gaseous refrigerant states. Generally, actual superheat is greater than 0. If it is less than 0, the refrigerant will freeze.

[0079] Specifically, the intelligent vehicle-mounted device determines the corresponding refrigerant saturation temperature T under the current actual pressure data of the evaporator based on the mapping relationship between the pressure data and the refrigerant saturation temperature and the actual pressure data of the evaporator. s and actual temperature data t; compare the actual temperature data t with the refrigerant saturation temperature T s The difference between the two is determined as the actual superheat of the evaporator, and the actual superheat is recorded as Δ t , Δ t =tT s .

[0080] Step 304 : determining the initial opening data of the electronic expansion valve according to the actual superheat and the preset target superheat.

[0081] The target superheat refers to the superheat corresponding to the maximum heat dissipation effect of the evaporator. The target superheat value range is 3℃-5℃.

[0082] Specifically, step 304 includes the following steps:

[0083] Step 1: Determine the theoretical opening data of the electronic expansion valve based on the actual temperature data of the evaporator.

[0084] Theoretical opening data refers to the feedforward opening corresponding to the actual temperature data under ideal conditions without interference. A mapping relationship exists between actual temperature data and theoretical opening data, which can be obtained through large-scale data summarization or data fitting. Initial opening data refers to the opening control value of the electronic expansion valve by the intelligent vehicle device.

[0085] Specifically, the intelligent vehicle-mounted device determines the theoretical opening data of the electronic expansion valve based on the mapping function between the temperature data and the feedforward opening duty cycle of the electronic expansion valve, as well as the actual temperature data of the evaporator, and records the theoretical opening data as r lead .

[0086] Step 2: Determine the adjustment opening data of the electronic expansion valve according to the actual superheat and the difference between the actual superheat and the target superheat.

[0087] The adjustment opening data is the opening data that the electronic expansion valve needs to adjust when the actual superheat reaches the target superheat.

[0088] Specifically, the intelligent vehicle-mounted device calculates the adjustment opening data of the electronic expansion valve according to the following formula:

[0089] r adj =K d ×Δ T +Σ i ×Δ t

[0090] Among them, K d is the proportional coefficient; K i is the integral coefficient; Δ t is the superheat; r adj It is the adjustment opening data of the electronic expansion valve. T is the difference between the actual superheat and the target superheat; if Δ T If Δ is positive, it means that the actual superheat is too high and the opening of the electronic expansion valve needs to be increased to reduce the actual temperature data of the evaporator and thus reduce the actual superheat. T If it is a negative value, it means that the actual superheat is too low and the opening of the electronic expansion valve needs to be reduced to increase the actual temperature data of the evaporator and thus increase the actual superheat;

[0091] It should be noted that: T When r is positive, adj is a positive value; Δ T When it is negative, r adj Is a negative value. adj The range is generally ±(20% to 30%).

[0092] Step 3: Determine the initial opening data of the electronic expansion valve based on the theoretical opening data and the adjusted opening data.

[0093] Specifically, the intelligent vehicle-mounted device determines the sum of the theoretical opening data and the adjusted opening data as the initial opening data, and records the initial opening data as r dem , r dem =r lead +r adj If radj If it is a negative value, it means that Δ T is a negative value, the actual superheat is small, at this time r dem decreases, the opening of the electronic expansion valve decreases; if r adj If it is a positive value, it means that Δ T is a positive value, the actual superheat is too high, at this time r dem Increases, the opening of the electronic expansion valve increases.

[0094] In the embodiment of the present application, the principle of feedforward control is introduced to control the opening of the electronic expansion valve, which can speed up the control speed of the intelligent vehicle-mounted equipment, reduce control overshoot, and increase the stability of the control system.

[0095] In one embodiment, Figure 4 The above-mentioned implementation process of determining the target opening data of the electronic expansion valve based on the initial opening data and the preset opening range may include:

[0096] Step 402 : Select a target opening interval from a plurality of preset opening intervals according to the initial opening data, and determine target marking information of the target opening interval; the target marking information is used to mark the arrangement order of the target opening interval in the plurality of preset opening intervals.

[0097] The target opening interval is the interval where the initial opening data is located. The target mark information can also be represented by the number of adjustment steps.

[0098] In some embodiments, before executing step 402 , the method further includes: dividing the opening range between the preset minimum opening data and the maximum opening data into a plurality of preset opening intervals according to a preset opening adjustment step.

[0099] The opening adjustment step size refers to the opening deviation between the lower and upper limits of the opening interval each time the opening interval is divided. The minimum opening data and maximum opening data are the lower and upper opening limits of the electronic expansion valve.

[0100] For example, the minimum opening data and the maximum opening data are 10% and 90% respectively, the preset opening adjustment step is 5%, and the opening range between the minimum opening data and the maximum opening data is 10%-90%. The opening interval is divided by the opening adjustment step, and 16 opening intervals can be obtained.

[0101] Specifically, the intelligent vehicle-mounted device takes the preset minimum opening data as a starting point and divides the opening range between the preset minimum opening data and the maximum opening data into a plurality of preset opening intervals using a preset opening adjustment step.

[0102] In some embodiments, determining target mark information of the target opening range includes:

[0103] Determine the opening difference between the initial opening data and the minimum opening data; adjust the opening step size according to the opening difference and the opening, and determine the target mark information.

[0104] The ratio of the opening difference between the initial opening data and the minimum opening data to the opening adjustment step is rounded down, and the resulting integer value is determined as the target mark information. The specific formula is as follows:

[0105]

[0106] Among them, n is the target label information; r dem is the initial opening data; r b is the minimum opening data, r step Adjust the step size for the opening.

[0107] For example, if the initial opening data is 28%, the minimum opening data is 10%, and the opening adjustment step is 5%, then the target mark information of the target opening interval where the initial opening data is located is:

[0108]

[0109] That is, the target flag information of the target opening interval in which the initial opening data is located is 3, and the target opening interval is ranked third among the plurality of preset opening intervals.

[0110] Step 404 : determining the target opening data of the electronic expansion valve according to the target mark information, the preset minimum opening data, and the preset opening adjustment step.

[0111] Each opening interval corresponds to opening data, and the opening data corresponding to each opening interval is different. The opening data corresponding to each opening interval can be pre-set and stored in a database, or can be calculated using a relational expression. The specific value corresponding to the opening data corresponding to each opening interval can be set according to actual conditions. In the embodiment of the present application, the opening data corresponding to each opening interval is calculated using a relational expression.

[0112] In some embodiments, step 404 specifically includes the following steps:

[0113] According to the target mark information and the opening adjustment step, the opening lower limit data corresponding to the target opening range is determined; according to the minimum opening data and the opening lower limit data, the target opening data of the electronic expansion valve is determined.

[0114] The opening lower limit data refers to the opening deviation between the lower limit value of the target opening range and the minimum opening data.

[0115] Specifically, the intelligent vehicle device multiplies the target tag information by the opening adjustment step size to determine the lower opening limit data corresponding to the target opening interval. The sum of the minimum opening data and the lower opening limit data is used to determine the target opening data for the electronic expansion valve. For example, if the initial opening data is 28%, the minimum opening data is 10%, and the opening adjustment step size is 5%, the target tag information for the target opening interval in which the initial opening data falls is 3, and the lower opening limit data corresponding to the target opening interval is 3 × 5% = 15%, the target opening data for the electronic expansion valve is 10% + 15% = 25%.

[0116] In an embodiment of the present application, a target opening interval is selected from a plurality of preset opening intervals based on the initial opening data, and target marking information of the target opening interval is determined; the target marking information is used to mark the arrangement order of the target opening intervals in the plurality of preset opening intervals; the target opening data of the electronic expansion valve is determined based on the target marking information, the preset minimum opening data, and the preset opening adjustment step. In the above method, a relational expression is adopted to determine the target opening data of the electronic expansion valve based on the target marking information, the preset minimum opening data, and the preset opening adjustment step, which can reduce the demand for storage hardware; at the same time, when determining the target marking information of the target opening interval, the target marking information is obtained by rounding down, and then the lower limit value of the target opening interval is determined as the target opening data of the electronic expansion valve, that is, the minimum control principle is adopted to adjust the opening of the electronic expansion valve, so as to avoid the problem that the opening span of the electronic expansion valve is too large, resulting in low evaporator superheat adjustment accuracy.

[0117] In one embodiment, this embodiment provides a detailed step of a method for controlling the opening of an electronic expansion valve, specifically including:

[0118] Step 1: According to the actual pressure data of the evaporator, determine the refrigerant saturation temperature and actual temperature data corresponding to the actual pressure data.

[0119] Step 2: The difference between the actual temperature data and the refrigerant saturation temperature is determined as the actual superheat.

[0120] Step 3: Determine the theoretical opening data of the electronic expansion valve based on the actual temperature data of the evaporator.

[0121] Step 4: Determine the adjustment opening data of the electronic expansion valve according to the actual superheat and the difference between the actual superheat and the target superheat.

[0122] Step 5: Determine the initial opening data of the electronic expansion valve based on the theoretical opening data and the adjusted opening data.

[0123] Step 6: Divide the opening range between the preset minimum opening data and the maximum opening data into a plurality of preset opening intervals according to the preset opening adjustment step.

[0124] Step 7: Select a target opening interval from multiple preset opening intervals based on the initial opening data, and determine the opening difference between the initial opening data and the minimum opening data; determine the target marking information based on the opening difference and the opening adjustment step size; the target marking information is used to mark the arrangement order of the target opening intervals in the multiple preset opening intervals.

[0125] Step 8: Determine the opening lower limit data corresponding to the target opening range based on the target mark information and the opening adjustment step size.

[0126] Step 9: Determine the target opening data of the electronic expansion valve according to the minimum opening data and the opening lower limit data.

[0127] Step 10: Control the opening of the electronic expansion valve according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0128] In an embodiment of the present application, the theoretical opening of the electronic expansion valve is calculated by the PI algorithm. When the superheat is high, the target opening of the electronic expansion valve is increased, and when the superheat is low, the target opening of the electronic expansion valve is reduced. According to the set opening adjustment step, the number of adjustment steps is calculated, and the modulus is used to correct the initial opening data of the electronic expansion valve, thereby avoiding frequent adjustment of the electronic expansion valve, ensuring that the superheat is within an appropriate range, and improving the air conditioning cooling effect.

[0129] In one embodiment, this embodiment provides a detailed embodiment of a method for controlling the opening of an electronic expansion valve. In the first step, the actual superheat is calculated:

[0130] 1.1: Based on the actual pressure data p (2.93 bar) after evaporation, the refrigerant saturation temperature T under the current actual pressure data p of the evaporator is determined by looking up the table through the mapping relationship between pressure data and refrigerant saturation temperature. s (1℃);

[0131] 1.2: Calculate the refrigerant evaporation temperature t (9°C) based on the actual pressure data p collected by the pressure and temperature sensor and the mapping relationship between pressure data and temperature data;

[0132] 1.3: According to the refrigerant saturation temperature T s (1℃) and actual temperature t(9℃), calculate the superheat Δ at the current temperature t , the calculation formula is as follows,

[0133] Δ t =tT s =9-1=8℃

[0134] The second step is to calculate the initial opening data of the electronic expansion valve:

[0135] 2.1: According to the actual ambient temperature t' (38℃), and the mapping relationship between temperature data and the electronic expansion valve feedforward opening, interpolation is used to calculate the theoretical opening r lead (15%);

[0136] 2.2: From superheat Δ t (8℃) Calculate the electronic expansion valve adjustment opening r adj , the calculation formula is as follows,

[0137] r adj =K d ×Δ T +∑K i ×Δ t =13%

[0138] where K d is the proportional coefficient, K i is the integral coefficient, Δ t is the superheat;

[0139] 2.3: Calculate the initial opening data r of the electronic expansion valve dem , the formula is as follows:

[0140] r dem =r lead +r adj =15+13=28%

[0141] The third step is to calculate the target opening data of the electronic expansion valve:

[0142] 3.1: Calculate the target mark information n. The calculation formula is as follows:

[0143]

[0144] Among them, rb is the minimum setting opening, r step Adjust the step size for the opening;

[0145] 3.2: Calculate the target opening data r of the electronic expansion valve set , the formula is as follows,

[0146] r set =r b +n×r step =10+3×5=25%

[0147] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0148] Based on the same inventive concept, embodiments of the present application further provide an electronic expansion valve opening control device for implementing the aforementioned electronic expansion valve opening control method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the electronic expansion valve opening control device provided below can be found in the aforementioned limitations of the electronic expansion valve opening control method and are not further elaborated here.

[0149] In one embodiment, Figure 5 As shown, an electronic expansion valve opening control device is provided, comprising: an initial opening determination module 501, a target opening determination module 502 and an opening adjustment module 503, wherein:

[0150] The initial opening determination module 501 is used to determine the initial opening data of the electronic expansion valve according to the actual pressure data of the evaporator;

[0151] The target opening determination module 502 is used to determine the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range;

[0152] The opening adjustment module 503 is used to control the opening of the electronic expansion valve according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0153] In one embodiment, the target opening determination module 502 is further configured to:

[0154] Selecting a target opening interval from a plurality of preset opening intervals according to the initial opening data, and determining target marking information of the target opening interval; the target marking information is used to mark the order in which the target opening interval is arranged in the plurality of preset opening intervals;

[0155] The target opening data of the electronic expansion valve is determined according to the target mark information, the preset minimum opening data and the preset opening adjustment step.

[0156] In one embodiment, the target opening determination module 502 is further configured to:

[0157] According to the target mark information and the opening adjustment step, the opening lower limit data corresponding to the target opening range is determined;

[0158] The target opening data of the electronic expansion valve is determined based on the minimum opening data and the opening lower limit data.

[0159] In one embodiment, the target opening determination module 502 is further configured to:

[0160] Determine the opening difference between the initial opening data and the minimum opening data;

[0161] The target mark information is determined based on the opening difference and the opening adjustment step size.

[0162] In one embodiment, the target opening determination module 502 is further configured to:

[0163] The opening range between the preset minimum opening data and the maximum opening data is divided into a plurality of preset opening intervals according to the preset opening adjustment step.

[0164] In one embodiment, the initial opening determination module 501:

[0165] Determine the actual superheat of the evaporator based on the actual pressure data of the evaporator;

[0166] The initial opening data of the electronic expansion valve is determined based on the actual superheat and the preset target superheat.

[0167] In one embodiment, the initial opening determination module 501:

[0168] According to the actual pressure data of the evaporator, determine the refrigerant saturation temperature and actual temperature data corresponding to the actual pressure data;

[0169] The difference between the actual temperature data and the refrigerant saturation temperature is determined as the actual superheat.

[0170] In one embodiment, the initial opening determination module 501:

[0171] Determine the theoretical opening data of the electronic expansion valve based on the actual temperature data of the evaporator;

[0172] Determining the adjustment opening data of the electronic expansion valve according to the actual superheat and the difference between the actual superheat and the target superheat;

[0173] The initial opening data of the electronic expansion valve is determined based on the theoretical opening data and the adjusted opening data.

[0174] Each module in the aforementioned electronic expansion valve opening control device may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0175] In one embodiment, a computer device is provided. The computer device may be an intelligent vehicle-mounted device, and its internal structure diagram may be as follows: Figure 6 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, an electronic expansion valve opening control method is implemented. The display unit of the computer device is used to form a visually visible image, and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device casing, or an external keyboard, touchpad or mouse, etc.

[0176] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0177] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0178] Determine the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator;

[0179] Determine the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range;

[0180] The opening of the electronic expansion valve is controlled according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0181] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0182] If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in the same opening range, the opening of the electronic expansion valve is controlled to remain unchanged;

[0183] If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in different opening ranges, the electronic expansion valve is controlled to adjust its opening according to the target opening data.

[0184] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0185] Selecting a target opening interval from a plurality of preset opening intervals according to the initial opening data, and determining target marking information of the target opening interval; the target marking information is used to mark the order in which the target opening interval is arranged in the plurality of preset opening intervals;

[0186] The target opening data of the electronic expansion valve is determined according to the target mark information, the preset minimum opening data and the preset opening adjustment step.

[0187] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0188] According to the target mark information and the opening adjustment step, the opening lower limit data corresponding to the target opening range is determined;

[0189] The target opening data of the electronic expansion valve is determined based on the minimum opening data and the opening lower limit data.

[0190] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0191] Determine the opening difference between the initial opening data and the minimum opening data;

[0192] The target mark information is determined based on the opening difference and the opening adjustment step size.

[0193] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0194] The opening range between the preset minimum opening data and the maximum opening data is divided into a plurality of preset opening intervals according to the preset opening adjustment step.

[0195] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0196] Determine the actual superheat of the evaporator based on the actual pressure data of the evaporator;

[0197] The initial opening data of the electronic expansion valve is determined based on the actual superheat and the preset target superheat.

[0198] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0199] According to the actual pressure data of the evaporator, determine the refrigerant saturation temperature and actual temperature data corresponding to the actual pressure data;

[0200] The difference between the actual temperature data and the refrigerant saturation temperature is determined as the actual superheat.

[0201] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0202] Determine the theoretical opening data of the electronic expansion valve based on the actual temperature data of the evaporator;

[0203] Determining the adjustment opening data of the electronic expansion valve according to the actual superheat and the difference between the actual superheat and the target superheat;

[0204] The initial opening data of the electronic expansion valve is determined based on the theoretical opening data and the adjusted opening data.

[0205] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0206] Determine the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator;

[0207] Determine the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range;

[0208] The opening of the electronic expansion valve is controlled according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0209] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0210] If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in the same opening range, the opening of the electronic expansion valve is controlled to remain unchanged;

[0211] If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in different opening ranges, the electronic expansion valve is controlled to adjust its opening according to the target opening data.

[0212] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0213] Selecting a target opening interval from a plurality of preset opening intervals according to the initial opening data, and determining target marking information of the target opening interval; the target marking information is used to mark the order in which the target opening interval is arranged in the plurality of preset opening intervals;

[0214] The target opening data of the electronic expansion valve is determined according to the target mark information, the preset minimum opening data and the preset opening adjustment step.

[0215] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: determining the opening lower limit data corresponding to the target opening interval according to the target mark information and the opening adjustment step size;

[0216] The target opening data of the electronic expansion valve is determined based on the minimum opening data and the opening lower limit data.

[0217] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: determining an opening difference between the initial opening data and the minimum opening data;

[0218] The target mark information is determined based on the opening difference and the opening adjustment step size.

[0219] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0220] The opening range between the preset minimum opening data and the maximum opening data is divided into a plurality of preset opening intervals according to the preset opening adjustment step.

[0221] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0222] Determine the actual superheat of the evaporator based on the actual pressure data of the evaporator;

[0223] The initial opening data of the electronic expansion valve is determined based on the actual superheat and the preset target superheat.

[0224] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0225] According to the actual pressure data of the evaporator, determine the refrigerant saturation temperature and actual temperature data corresponding to the actual pressure data;

[0226] The difference between the actual temperature data and the refrigerant saturation temperature is determined as the actual superheat.

[0227] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0228] Determine the theoretical opening data of the electronic expansion valve based on the actual temperature data of the evaporator;

[0229] Determining the adjustment opening data of the electronic expansion valve according to the actual superheat and the difference between the actual superheat and the target superheat;

[0230] The initial opening data of the electronic expansion valve is determined based on the theoretical opening data and the adjusted opening data.

[0231] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0232] Determine the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator;

[0233] Determine the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range;

[0234] The opening of the electronic expansion valve is controlled according to the target opening data so that the actual superheat of the evaporator matches the target superheat.

[0235] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0236] If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in the same opening range, the opening of the electronic expansion valve is controlled to remain unchanged;

[0237] If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in different opening ranges, the electronic expansion valve is controlled to adjust its opening according to the target opening data.

[0238] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0239] Selecting a target opening interval from a plurality of preset opening intervals according to the initial opening data, and determining target marking information of the target opening interval; the target marking information is used to mark the order in which the target opening interval is arranged in the plurality of preset opening intervals;

[0240] The target opening data of the electronic expansion valve is determined according to the target mark information, the preset minimum opening data and the preset opening adjustment step.

[0241] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: determining the opening lower limit data corresponding to the target opening interval according to the target mark information and the opening adjustment step size;

[0242] The target opening data of the electronic expansion valve is determined based on the minimum opening data and the opening lower limit data.

[0243] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: determining an opening difference between the initial opening data and the minimum opening data;

[0244] The target mark information is determined based on the opening difference and the opening adjustment step size.

[0245] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0246] The opening range between the preset minimum opening data and the maximum opening data is divided into a plurality of preset opening intervals according to the preset opening adjustment step.

[0247] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0248] Determine the actual superheat of the evaporator based on the actual pressure data of the evaporator;

[0249] The initial opening data of the electronic expansion valve is determined based on the actual superheat and the preset target superheat.

[0250] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0251] According to the actual pressure data of the evaporator, determine the refrigerant saturation temperature and actual temperature data corresponding to the actual pressure data;

[0252] The difference between the actual temperature data and the refrigerant saturation temperature is determined as the actual superheat.

[0253] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0254] Determine the theoretical opening data of the electronic expansion valve based on the actual temperature data of the evaporator;

[0255] Determining the adjustment opening data of the electronic expansion valve according to the actual superheat and the difference between the actual superheat and the target superheat;

[0256] The initial opening data of the electronic expansion valve is determined based on the theoretical opening data and the adjusted opening data.

[0257] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions.

[0258] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0259] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0260] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for controlling the opening of an electronic expansion valve, characterized in that: The method comprises: Determine the initial opening data of the electronic expansion valve based on the actual pressure data of the evaporator; determining target opening data of the electronic expansion valve according to the initial opening data and a preset opening range; controlling the opening of the electronic expansion valve according to the target opening data so that the actual superheat of the evaporator matches the target superheat; The controlling the opening of the electronic expansion valve according to the target opening data includes: If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in the same opening range, the opening of the electronic expansion valve is controlled to remain unchanged; If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in different opening ranges, the electronic expansion valve is controlled to adjust its opening according to the target opening data.

2. The method according to claim 1, characterized in that Determining the target opening data of the electronic expansion valve according to the initial opening data and a preset opening range includes: Selecting a target opening interval from the plurality of preset opening intervals according to the initial opening data, and determining target marking information of the target opening interval; the target marking information is used to mark the order in which the target opening interval is arranged in the plurality of preset opening intervals; The target opening data of the electronic expansion valve is determined according to the target mark information, the preset minimum opening data and the preset opening adjustment step.

3. The method according to claim 2, characterized in that The step of determining the target opening data of the electronic expansion valve according to the target mark information, the preset minimum opening data, and the preset opening adjustment step size includes: Determining the opening lower limit data corresponding to the target opening range according to the target mark information and the opening adjustment step; The target opening data of the electronic expansion valve is determined according to the minimum opening data and the opening lower limit data.

4. The method according to claim 2, characterized in that The target mark information for determining the target opening range includes: determining an opening difference between the initial opening data and the minimum opening data; Target mark information is determined according to the opening difference and the opening adjustment step.

5. The method according to any one of claims 1 to 4, characterized in that Before the step of determining the target opening data of the electronic expansion valve according to the initial opening data and the preset opening range, the method further includes: The opening range between the preset minimum opening data and the maximum opening data is divided into a plurality of preset opening intervals according to the preset opening adjustment step.

6. The method according to claim 1, characterized in that Determining the initial opening data of the electronic expansion valve according to the actual pressure data of the evaporator includes: determining an actual superheat of the evaporator according to actual pressure data of the evaporator; The initial opening data of the electronic expansion valve is determined according to the actual superheat and the preset target superheat.

7. An electronic expansion valve opening control device, characterized in that: The device comprises: An initial opening determination module is used to determine the initial opening data of the electronic expansion valve according to the actual pressure data of the evaporator; a target opening determination module, configured to determine target opening data of the electronic expansion valve according to the initial opening data and a preset opening range; an opening adjustment module, configured to control the opening of the electronic expansion valve according to the target opening data so that the actual superheat of the evaporator matches the target superheat; The controlling the opening of the electronic expansion valve according to the target opening data includes: If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in the same opening range, the opening of the electronic expansion valve is controlled to remain unchanged; If the target opening data corresponding to the current moment and the initial opening data corresponding to the previous moment are in different opening ranges, the electronic expansion valve is controlled to adjust its opening according to the target opening data.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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