Opening control method and device of electronic expansion valve, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses an opening degree control method and device of an electronic expansion valve, electronic equipment and a computer readable storage medium, and relates to the technical field of intelligent control. Under the condition that the relation between the actual air suction superheat degree and the reference air suction superheat degree does not meet the preset condition, the target opening degree is determined based on the actual air suction superheat degree and the reference air suction superheat degree; and the opening degree of an electronic expansion valve of the refrigeration equipment is adjusted to the target opening degree. Therefore, the opening degree of the electronic expansion valve can be reasonably controlled based on the real-time air suction superheat degree and the reference air suction superheat degree, the opening degree of the electronic expansion valve is controlled in time, system balance is rapidly achieved, and the reliability of refrigeration equipment is improved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the field of intelligent control technology, and specifically to a method, device, electronic device and computer-readable storage medium for controlling the opening of an electronic expansion valve. Background Art

[0002] The electronic expansion valve is an important component in refrigeration equipment. It can automatically adjust the flow of refrigerant according to real-time temperature and pressure signals to ensure that the evaporation process of the refrigerant in the evaporator is more efficient and stable, and avoid excessive or insufficient refrigerant flowing into the evaporator, thereby improving refrigeration efficiency.

[0003] Therefore, how to reasonably control the opening of the electronic expansion valve is a problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present disclosure provide a method, device, electronic device and computer-readable storage medium for controlling the opening of an electronic expansion valve, aiming to solve at least one of the technical problems in the related art to a certain extent.

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

[0006] Obtain the actual suction superheat in the refrigeration equipment;

[0007] When the relationship between the actual suction superheat and the reference suction superheat does not satisfy a preset condition, determining a target opening degree based on the actual suction superheat and the reference suction superheat;

[0008] The opening degree of the electronic expansion valve of the refrigeration equipment is adjusted to the target opening degree.

[0009] In a second aspect, an embodiment of the present disclosure further provides an opening control device for an electronic expansion valve, the device comprising:

[0010] An acquisition module, used for acquiring actual suction superheat in the refrigeration equipment;

[0011] a determination module, configured to determine a target opening degree based on the actual suction superheat and the reference suction superheat when a relationship between the actual suction superheat and the reference suction superheat meets a preset condition;

[0012] The regulating module is used to regulate the opening of the electronic expansion valve of the refrigeration equipment to the target opening.

[0013] In a third aspect, an embodiment of the present disclosure further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps in the above-mentioned method for controlling the opening of an electronic expansion valve when executed by the processor.

[0014] In a fourth aspect, an embodiment of the present disclosure further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps in the above-mentioned method for controlling the opening of an electronic expansion valve are implemented.

[0015] In a fifth aspect, the embodiments of the present disclosure further provide a computer program product or a computer program, the computer program product or the computer program including computer instructions, the computer instructions being stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the methods provided in the various optional implementations described in the embodiments of the present disclosure.

[0016] In the disclosed embodiment, the actual suction superheat in the refrigeration device is first obtained, and then, when the relationship between the actual suction superheat and the reference suction superheat does not meet the preset conditions, the target opening is determined based on the actual suction superheat and the reference suction superheat, and then the opening of the electronic expansion valve of the refrigeration device is adjusted to the target opening. In this way, the opening of the electronic expansion valve can be reasonably controlled based on the real-time suction superheat and the reference suction superheat, and the opening of the electronic expansion valve can be controlled in time, so as to quickly achieve system balance and improve the reliability of the refrigeration device.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a flow chart of the method for controlling the opening degree of an electronic expansion valve provided in the first embodiment of the present disclosure;

[0020] Figure 2 is a flow chart of a method for controlling the opening degree of an electronic expansion valve provided in a second embodiment of the present disclosure;

[0021] Figure 3is an exemplary opening control flow chart provided by an embodiment of the present disclosure;

[0022] Figure 4 is a structural schematic diagram of an opening control device of an electronic expansion valve provided in an embodiment of the present disclosure;

[0023] Figure 5 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] Some embodiments of the present disclosure will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. Various changes, modifications and equivalents of the methods, devices and / or systems described herein will become apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example and is not limited to those orders set forth herein, but can be changed as becomes apparent after understanding the present disclosure, except for operations that must be performed in a specific order. In addition, for clarity and brevity, descriptions of features known in the art may be omitted.

[0025] The embodiments described in some embodiments of the present disclosure below do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0026] It should be noted that the executor of the electronic expansion valve opening control method of this embodiment can be an electronic expansion valve opening control device, which can be configured in any type of electronic equipment, such as air conditioning equipment, air source heat pump, etc., which is not limited here.

[0027] In the embodiments of the present disclosure, the electronic expansion valve opening control method will be described by taking the "electronic expansion valve opening control device" as the execution subject, which is hereinafter referred to as the "device" and is not limited here. It should be noted that the description order of the following embodiments is not used as a limitation on the priority order of the embodiments.

[0028] Figure 1 It is a flow chart of a method for controlling the opening of an electronic expansion valve provided according to the first embodiment of the present disclosure.

[0029] like Figure 1 As shown, the method includes:

[0030] Step 101, obtaining actual suction air superheat in the refrigeration equipment.

[0031] The refrigeration equipment may be equipment for lowering the temperature, such as a refrigerator, an air conditioner, a cold storage, etc., which is not limited here.

[0032] Among them, the suction superheat can be the difference between the suction temperature of the compressor and the evaporation temperature. It should be noted that the suction temperature of the compressor higher than the evaporation temperature is called suction superheat. After the refrigerant vapor evaporates in the evaporator, if it continues to absorb heat, its temperature will be higher than the evaporation temperature, forming superheated vapor. When this part of superheated vapor enters the compressor, the difference between its temperature and the evaporation temperature is the suction superheat.

[0033] The actual suction air superheat may be the suction air superheat actually measured currently.

[0034] As a possible implementation method, the suction temperature and the evaporation temperature can be measured respectively first, and then the temperature difference between the suction temperature and the evaporation temperature can be used as the actual suction superheat. Optionally, a thermometer or a temperature sensor can be used to measure the temperature of the compressor suction port as the suction temperature. Optionally, when determining the evaporation temperature, the pressure in the evaporator can be measured first, and then the saturation temperature under the corresponding pressure can be found to obtain the evaporation temperature, which is not limited here.

[0035] As another possible implementation method, the suction temperature and suction pressure currently corresponding to the refrigeration equipment can be first determined, and then the saturation temperature associated with the suction pressure can be determined based on a preset mapping relationship, and then the absolute value of the difference between the suction temperature and the saturation temperature can be used as the actual suction superheat.

[0036] The suction temperature may be the temperature at which the refrigerant is sucked into the compressor of the refrigeration equipment. The suction temperature may be measured by a temperature sensor, and the suction temperature is usually affected by the operating state of the equipment and external environmental conditions.

[0037] The suction pressure can be the pressure of the refrigerant on the suction side of the compressor. The suction pressure can be measured by a pressure sensor. The suction pressure is affected by many factors, such as the refrigerant flow rate, compressor speed, ambient temperature, and refrigerant type. The suction pressure value is usually expressed in Pascal (Pa) or bar (bar).

[0038] In this embodiment, the suction pressure may also be referred to as low pressure.

[0039] The saturation temperature may be a temperature corresponding to the state of the refrigerant at a given pressure, that is, a temperature at which the refrigerant begins to boil or condense at the given pressure.

[0040] It is understandable that a mapping relationship between saturation temperature and suction pressure can be established in advance, and this mapping relationship reflects the saturation temperature corresponding to the refrigerant under different suction pressures. For example, for refrigerant R22, a corresponding table of pressure and saturation temperature can be established based on its pressure-temperature characteristic curve, so as to quickly determine the saturation temperature in practical applications.

[0041] Specifically, the saturation temperature corresponding to the measured suction pressure can be searched or calculated using a preset mapping relationship. This saturation temperature represents the temperature when the refrigerant is in a gas-liquid equilibrium state under the suction pressure. For example, if the measured suction pressure is P1, by querying the mapping relationship table, it can be determined that the corresponding saturation temperature is a specific value T1.

[0042] Then, the measured suction temperature can be subtracted from the saturation temperature to obtain the difference. Since the suction temperature may be higher or lower than the saturation temperature, in order to obtain the absolute value of the actual suction superheat, the absolute value of the difference needs to be taken. For example, if the suction temperature is A℃ and the saturation temperature is B℃, the actual suction superheat is |AB|℃, which is not limited here.

[0043] Step 102 : when the relationship between the actual suction superheat and the reference suction superheat does not satisfy a preset condition, a target opening degree is determined based on the actual suction superheat and the reference suction superheat.

[0044] The reference suction air superheat may be a preset reference value of the suction air superheat, or may be an ideal suction air superheat value preset according to system design and operation requirements.

[0045] The target opening may be the opening of the electronic expansion valve to be set.

[0046] The preset condition may be a preset condition for not adjusting the opening of the electronic expansion valve.

[0047] It should be noted that the actual suction superheat and the reference suction superheat can be compared to determine whether the current operating state of the refrigeration equipment meets expectations. For example, if the actual suction superheat differs greatly from the reference suction superheat, it means that there may be problems with the operating state of the system and adjustments are required.

[0048] The preset conditions may be set according to the performance requirements and stability requirements of the system. For example, an allowable deviation range may be set, and when the difference between the actual suction superheat and the reference suction superheat exceeds this range, it is considered that the relationship does not meet the preset conditions.

[0049] Alternatively, the preset condition may also be a specific logical relationship, such as the actual suction superheat should always be greater than the reference suction superheat, or the ratio of the actual suction superheat to the reference suction superheat should be within a specific range, etc., which is not limited here.

[0050] As a possible implementation manner, a target range associated with a reference suction superheat may be first determined, and then when the actual suction superheat value is within the target range, it is determined that the relationship between the actual suction superheat and the reference suction superheat satisfies a preset condition.

[0051] The target range may be a range determined according to a reference suction air superheat.

[0052] For example, if the reference suction superheat is M, [Ma, M+a] can be used as the target range, which is not limited here. Wherein, a can be 1°C, or 1.5°C, or 0.5°C, which is not limited here.

[0053] For example, if the reference suction superheat M is 10°C, [9°C, 11°C] can be used as the target range. If the actual suction superheat is 10.5°C, which is within the target range, it can be considered that the relationship between the actual suction superheat and the reference suction superheat meets the preset conditions. For example, if the actual suction superheat is 8°C, which is not within the target range, it can be considered that the relationship between the actual suction superheat and the reference suction superheat does not meet the preset conditions, and no limitation is made here.

[0054] Optionally, when the relationship between the actual suction superheat and the reference suction superheat meets the preset condition, the opening of the electronic expansion valve is maintained, that is, the opening of the electronic expansion valve does not need to be adjusted. If the preset condition is not met, it is necessary to calculate the target opening, and then adjust the opening of the electronic expansion valve based on the target opening.

[0055] Optionally, the reference suction superheat may be adjusted based on the current ambient temperature change information corresponding to the refrigeration equipment.

[0056] It should be noted that changes in ambient temperature will directly affect the operating status of the refrigeration equipment. When the ambient temperature rises, the load of the refrigeration equipment will increase, and more refrigerant flow will be required to maintain the same cooling effect. At this time, the suction temperature will also increase accordingly, which may cause changes in the suction superheat. For example, in hot summer weather, the refrigeration equipment needs to work harder to reduce the indoor temperature, and the suction temperature may be higher than in winter.

[0057] Therefore, the reference suction superheat can be appropriately adjusted according to the ambient temperature change information. For example, a corresponding relationship table or function between the ambient temperature change and the reference suction superheat can be established in advance. When the ambient temperature changes, the reference suction superheat is adjusted according to the relationship table or function, which is not limited here.

[0058] For example, when the ambient temperature change information indicates that the ambient temperature rises by 4°C, the reference suction superheat increases by a certain value, which is not limited here. In this way, the refrigeration equipment can maintain a good operating state under different ambient temperatures.

[0059] Optionally, the reference suction superheat may be adjusted based on the load change information currently corresponding to the refrigeration equipment.

[0060] It should be noted that the load change of the refrigeration equipment will also affect the suction superheat. When the load increases, the flow demand of the refrigerant increases, the suction temperature may increase, and thus the suction superheat changes. Conversely, when the load decreases, the suction superheat may decrease. For example, when the number of people in the room increases or the electrical equipment is turned on, the load of the refrigeration equipment will increase, and when the number of people in the room decreases or the electrical equipment is turned off, the load will decrease.

[0061] The load change may be a change in the number of people in the use space, a change in the equipment operation status, a change in the use time, etc., which is not limited here.

[0062] For example, when the load of the refrigeration equipment increases, more cooling capacity is needed to maintain the set temperature, so the refrigerant flow rate needs to be increased to improve the heat exchange efficiency. The increase in refrigerant flow rate will cause the suction temperature to increase, which in turn affects the suction superheat.

[0063] It is understandable that a relationship model between the load change information of the refrigeration equipment and the reference suction superheat can be established in advance through experimental data or theoretical analysis. This model can be linear, nonlinear or based on an empirical formula, which is not limited here. Different relationship models can be established for different types of load change information.

[0064] For example, it can be set that when the load increases by a certain percentage, the reference suction superheat will increase by a certain value accordingly, so that the refrigeration equipment can maintain stable operation under different load conditions.

[0065] Optionally, the reference suction superheat may be adjusted based on the load change information and ambient temperature change information currently corresponding to the refrigeration equipment.

[0066] It is understandable that a reference suction superheat adjustment model that comprehensively considers load changes and ambient temperature changes can be established in advance through experimental data and theoretical analysis. This model can be a multivariate function that takes the load change amplitude, ambient temperature change and other related factors as input variables and the reference suction superheat adjustment value as the output variable.

[0067] For example, the reference suction superheat adjustment value = f (load change amplitude, ambient temperature change, equipment characteristic parameters).

[0068] Optionally, sensors and monitoring equipment may be used to monitor the load change information and ambient temperature change information of the refrigeration equipment in real time, and then input the information into the adjustment model to calculate the adjustment value of the reference suction superheat.

[0069] Therefore, by comprehensively considering the current load change information and ambient temperature change information corresponding to the refrigeration equipment to adjust the reference suction superheat, the refrigeration equipment can maintain efficient and stable operation under different operating conditions, thereby improving the performance and reliability of the system.

[0070] Step 103: adjusting the opening of the electronic expansion valve of the refrigeration equipment to a target opening.

[0071] Among them, the electronic expansion valve is a control device that can accurately adjust the refrigerant flow rate and is a key component in refrigeration equipment. The electronic expansion valve changes the valve opening by receiving signals from the controller, thereby adjusting the refrigerant flow rate. It is usually composed of a valve body, a valve core, a coil, and a sensor.

[0072] Optionally, the device may drive the valve core to move and adjust the valve opening to the target opening by sending an electrical signal about the target opening to the coil of the electronic expansion valve, which is not limited here.

[0073] For example, if the current opening of the electronic expansion valve is 30% and the target opening is 50%, the opening of the electronic expansion valve may be increased from 30% to 50%, which is not limited here.

[0074] It should be noted that by adjusting the opening of the electronic expansion valve to the target opening, it is possible to ensure that the refrigeration equipment maintains optimal performance under the current operating conditions. By precisely controlling the refrigerant flow rate, the evaporator can always be kept in an appropriate heat exchange state, thereby improving the refrigeration efficiency and energy efficiency ratio of the system.

[0075] As a possible implementation method, it is possible to first determine whether the relationship between the actual intake superheat and the reference intake superheat meets the preset conditions according to a specified cycle, and then adjust the opening of the electronic expansion valve when the relationship does not meet the preset conditions. The above steps are repeated until the relationship meets the preset conditions.

[0076] The specified period may be 10 seconds, 11 seconds, or 9 seconds, which is not limited here.

[0077] For example, if the specified cycle is 10 seconds, the current actual suction superheat and the reference suction superheat can be compared every 10 seconds to determine whether the preset condition is met. If not, the opening of the electronic expansion valve can be adjusted based on the calculated target opening. The adjustment is made every 10 seconds and executed in a loop until the relationship between the actual suction superheat and the reference suction superheat meets the preset condition. Thus, the relationship between the actual suction superheat and the reference suction superheat can meet the preset condition by continuously adjusting the opening of the electronic expansion valve.

[0078] In the disclosed embodiment, the actual suction superheat in the refrigeration device is first obtained, and then, when the relationship between the actual suction superheat and the reference suction superheat does not meet the preset conditions, the target opening is determined based on the actual suction superheat and the reference suction superheat, and then the opening of the electronic expansion valve of the refrigeration device is adjusted to the target opening. In this way, the opening of the electronic expansion valve can be reasonably controlled based on the real-time suction superheat and the reference suction superheat, and the opening of the electronic expansion valve can be controlled in time, so as to quickly achieve system balance and improve the reliability of the refrigeration device.

[0079] Figure 2 It is a flow chart of a method for controlling the opening of an electronic expansion valve provided according to the second embodiment of the present disclosure.

[0080] like Figure 2 As shown, the method includes:

[0081] Step 201, obtaining the actual suction air superheat in the refrigeration equipment.

[0082] It should be noted that the specific implementation of step 201 can refer to the above embodiment and will not be described in detail here.

[0083] Step 202: when the relationship between the actual suction superheat and the reference suction superheat does not satisfy a preset condition, determine a first difference and an actual opening of the electronic expansion valve.

[0084] The first difference represents a difference between an actual suction air superheat and a reference suction air superheat.

[0085] The actual opening is the current opening state of the electronic expansion valve, which can be measured by a sensor or directly read.

[0086] For example, if the actual suction superheat is K1 and the reference suction superheat is K2, K1-K2 may be used as the first difference, which is not limited herein.

[0087] It should be noted that how to judge whether the relationship between the actual suction superheat and the reference suction superheat does not meet the preset condition can be referred to the description in the above embodiment, which will not be elaborated here.

[0088] Step 203: Determine the target adjustment opening based on the first difference, a preset proportionality coefficient and an integration time.

[0089] The target adjustment opening may be an adjustment amount for the opening of the electronic expansion valve.

[0090] As an implementation method, in the embodiment of the present disclosure, a proportional integral controller (PI controller, hereinafter referred to as "controller") can be pre-constructed, and then the first difference is used as the input of the controller, and the target adjustment opening is used as the output of the controller.

[0091] The preset proportional coefficient and integral time may be parameter values ​​in the controller, and may be fixed values ​​determined according to actual application scenarios, which are not limited here. The proportional coefficient and integral time have different effects on the controller.

[0092] The proportionality factor represents the proportional relationship between the change in the controller output and the change in the input error. In a control system, when the input error (i.e., the difference between the actual value and the set value) changes, the controller will adjust its output according to the proportionality factor to reduce the error.

[0093] The size of the proportional coefficient determines the sensitivity of the controller to error changes: when the proportional coefficient is large, the controller responds to error changes more quickly, but may cause excessive overshoot and oscillation in the system. When the proportional coefficient is small, the controller responds to error changes more slowly, which helps the stability of the system, but may reduce the response speed of the system.

[0094] The integral time represents how quickly the controller responds to the accumulated error. In a control system, the integral term is a measure of the accumulation of error over time, taking into account the change in error over a period of time. The longer the integral time, the slower the controller responds to the accumulated error; the shorter the integral time, the faster the controller responds to the accumulated error.

[0095] As a possible implementation method, the target adjustment opening can be determined based on the first difference corresponding to the current sampling moment, the first difference corresponding to the historical sampling moment, a preset proportional coefficient and an integration time.

[0096] For example, if the current sampling time is k, the first difference corresponding to the current sampling time is recorded as e(k), the historical sampling time is the historical time k-1 adjacent to the current sampling time, and the first difference corresponding to the historical sampling time is recorded as e(k-1).

[0097] For example, the target adjustment opening can be calculated by the following formula:

[0098]

[0099] Among them, PI(k) is the target adjustment opening, e(k) is the first difference corresponding to the current sampling time, e(k-1) is the first difference corresponding to the historical sampling time, K p is the proportionality coefficient, T i is the integration time.

[0100] Where a1 is the proportional coefficient adjustment factor, which can be used to adjust the coefficient of the proportional term. By multiplying [e(k)-e(k-1)] by K p Then divide it by "a1" to scale the effect of the proportional term to a certain extent. For example, in the actual debugging process, if the effect of the proportional term is too large, it is easy to cause system instability. This proportional coefficient adjustment factor can be introduced to reduce the impact of the proportional term. Optionally, the value of a1 can be 10, which is not limited here.

[0101] Among them, a2 is the integral term adjustment factor, which can be used to adjust the strength of the integral term. The role of the integral term is to eliminate the steady-state error of the system, but if the integral effect is too strong, it may cause the system to respond slowly or overshoot. The integral term adjustment factor can be used to control the contribution of the integral term in the target adjustment opening calculation to achieve a better control effect, which is not limited here. Optionally, the value of a2 can be 10, which is not limited here.

[0102] As a possible implementation method, the current operating condition information corresponding to the refrigeration equipment may be determined first, and then the proportional coefficient and integration time corresponding to the operating condition information may be obtained.

[0103] The operating information of the refrigeration equipment includes but is not limited to the refrigeration load, ambient temperature, type of refrigerant, etc. Under different operating conditions, the dynamic characteristics of the refrigeration equipment and the requirements for adjustment may be different. For example, under high refrigeration load and high temperature environment, faster response speed and stronger adjustment force are required; while under low refrigeration load and low temperature environment, more stable adjustment is required to avoid over-adjustment.

[0104] Optionally, the corresponding proportional coefficient and integral time may be obtained according to the currently determined working condition information, for example, by using a pre-established parameter table, an empirical formula or an online adaptive algorithm.

[0105] For example, a set of different proportional coefficients and integration times can be determined according to different refrigeration load ranges and ambient temperature intervals. In actual operation, according to the real-time monitored working condition information, the corresponding parameters (proportional coefficient and integration time) are selected to calculate the target adjustment opening, which is not limited here. Therefore, by determining the target adjustment opening in this way, the electronic expansion valve of the refrigeration equipment can be adaptively adjusted according to different working conditions, thereby improving the stability, accuracy and energy efficiency of the system.

[0106] Step 204, determining the target opening according to the target adjustment opening and the actual opening.

[0107] Optionally, the target adjustment opening and the actual opening may be added together to obtain the target opening.

[0108] For example, if the target adjustment opening is 10% and the actual opening is 40%, the target opening is 50%, which is not limited here.

[0109] Alternatively, the target adjustment opening and the actual opening can be added together, and then a preset adjustment parameter can be added to obtain the target opening, which is not limited here. For example, if the target adjustment opening is 10%, the actual opening is 40%, and the preset adjustment parameter is 2%, then the target opening is 52%, which is not limited here.

[0110] Step 205: adjusting the opening of the electronic expansion valve of the refrigeration equipment to a target opening.

[0111] It should be noted that the specific implementation of step 205 can refer to the above embodiment and will not be described in detail here.

[0112] In the disclosed embodiment, the actual suction superheat in the refrigeration device is first obtained, and then when the relationship between the actual suction superheat and the reference suction superheat does not meet the preset conditions, the first difference and the actual opening of the electronic expansion valve are determined, and then the target adjustment opening is determined based on the first difference, the preset proportional coefficient and the integration time, and then the target opening is determined according to the target adjustment opening and the actual opening, and then the opening of the electronic expansion valve of the refrigeration device is adjusted to the target opening. Therefore, by real-time monitoring and adjusting the actual suction superheat to make it close to the reference suction superheat, it can be ensured that the refrigeration system operates in the best state, which helps to improve the refrigeration efficiency and energy efficiency ratio of the system and reduce energy consumption. When the refrigeration equipment experiences load changes or changes in ambient temperature, the opening of the electronic expansion valve can be adjusted in time to quickly restore the system to a stable state, which can reduce system fluctuations and oscillations and improve the reliability and stability of the system.

[0113] Figure 3 is an exemplary opening control flow chart provided by the embodiment of the present disclosure. Figure 3As shown, the device can first obtain the current suction temperature and suction pressure of the refrigeration equipment, as well as the actual opening of the electronic expansion valve, and then determine the saturation temperature corresponding to the suction pressure based on the mapping relationship. Then, T can be calculated. 实际吸气过热度 , and judge T 实际吸气过热度 Is it in T 目标吸气过热度 ±1℃ range. If it is, the actual opening of the electronic expansion valve can be maintained. If it is not, the target opening can be calculated and the opening of the electronic expansion valve can be adjusted to the target opening. Then the above process is repeated every 10 seconds to determine T again. 实际吸气过热度 Is it in T 目标吸气过热度 Within the range of ±1℃, make corresponding adjustments.

[0114] In order to facilitate better implementation of the electronic expansion valve opening control method disclosed herein, the present disclosure also provides an electronic expansion valve opening control device based on the electronic expansion valve opening control method described above. The meanings of the terms are the same as those in the electronic expansion valve opening control method described above, and the specific implementation details can refer to the description in the method embodiment.

[0115] See also Figure 4 , Figure 4 : is a structural schematic diagram of an opening control device of an electronic expansion valve provided in an embodiment of the present disclosure, the opening control device 400 of the electronic expansion valve comprises:

[0116] An acquisition module 410 is used to acquire actual suction superheat in the refrigeration equipment;

[0117] A first determination module 420 is used to determine a target opening degree based on the actual suction superheat and the reference suction superheat when the relationship between the actual suction superheat and the reference suction superheat meets a preset condition;

[0118] The regulating module 430 is used to regulate the opening of the electronic expansion valve of the refrigeration equipment to a target opening.

[0119] Optionally, the determining module includes:

[0120] a first determining unit, configured to determine a first difference and an actual opening degree of the electronic expansion valve, wherein the first difference represents a difference between an actual suction superheat and a reference suction superheat;

[0121] a second determining unit, configured to determine a target adjustment opening based on the first difference, a preset proportionality coefficient and an integration time;

[0122] The third determining unit is used to determine the target opening according to the target adjustment opening and the actual opening.

[0123] Optionally, the second determining unit includes:

[0124] The determination subunit is used to determine the target adjustment opening based on the first difference corresponding to the current sampling moment, the first difference corresponding to the historical sampling moment, the preset proportional coefficient and the integration time.

[0125] Optionally, the determining subunit is specifically used to:

[0126]

[0127] Among them, PI(k) is the target adjustment opening, e(k) is the first difference corresponding to the current sampling time, e(k-1) is the first difference corresponding to the historical sampling time, K p is the proportionality coefficient, T i is the integration time, a1 is the proportional coefficient adjustment factor, and a2 is the integral term adjustment factor.

[0128] Optionally, the second determining unit is further configured to:

[0129] Determine the current operating condition information corresponding to the refrigeration equipment;

[0130] The proportional coefficient and the integral time corresponding to the operating condition information are obtained.

[0131] Optionally, the acquisition module 410 is specifically configured to:

[0132] Determine the suction temperature and suction pressure currently corresponding to the refrigeration equipment;

[0133] Determining a saturation temperature associated with the suction pressure based on a preset mapping relationship;

[0134] The absolute value of the difference between the suction air temperature and the saturation temperature is used as the actual suction air superheat.

[0135] Optionally, the device further includes:

[0136] A first adjustment module, configured to adjust the reference suction superheat based on the ambient temperature change information currently corresponding to the refrigeration equipment;

[0137] A second adjustment module, configured to adjust the reference suction superheat based on load change information currently corresponding to the refrigeration equipment;

[0138] The third adjustment module is used to adjust the reference suction superheat based on the load change information and ambient temperature change information currently corresponding to the refrigeration equipment.

[0139] Optionally, the adjustment module 430 is further configured to:

[0140] According to a specified period, determining whether the relationship between the actual suction superheat and the reference suction superheat satisfies the preset condition;

[0141] When the relationship does not satisfy the preset condition, adjusting the opening of the electronic expansion valve;

[0142] The above steps are executed repeatedly until the relationship satisfies the preset condition.

[0143] Optionally, the device further includes:

[0144] a second determination module, configured to determine a target range associated with the reference suction air superheat;

[0145] The third determining module is configured to determine, when the value of the actual intake air superheat is within the target range, whether the relationship between the actual intake air superheat and the reference intake air superheat satisfies the preset condition.

[0146] Optionally, the device further includes:

[0147] The opening maintaining module is used to maintain the opening of the electronic expansion valve when the relationship between the actual suction superheat and the reference suction superheat meets the preset condition.

[0148] In the disclosed embodiment, the actual suction superheat in the refrigeration device is first obtained, and then, when the relationship between the actual suction superheat and the reference suction superheat does not meet the preset conditions, the target opening is determined based on the actual suction superheat and the reference suction superheat, and then the opening of the electronic expansion valve of the refrigeration device is adjusted to the target opening. In this way, the opening of the electronic expansion valve can be reasonably controlled based on the real-time suction superheat and the reference suction superheat, and the opening of the electronic expansion valve can be controlled in time, so as to quickly achieve system balance and improve the reliability of the refrigeration device.

[0149] In addition, the present disclosure also provides an electronic device, such as Figure 5 As shown, it shows a schematic diagram of the structure of the electronic device involved in the present disclosure, specifically:

[0150] The electronic device may include components such as a processor 501 with one or more processing cores, a memory 502 with one or more computer-readable storage media, a power supply 503, and an input unit 504. Those skilled in the art will appreciate that Figure 5 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0151] The processor 501 is the control center of the electronic device, and uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 502, and calling data stored in the memory 502, the processor 501 performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the processor 501 may include one or more processing cores; preferably, the processor 501 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 501.

[0152] The memory 502 can be used to store software programs and modules. The processor 501 executes various functional applications and data processing by running the software programs and modules stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 502 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 502 may also include a memory controller to provide the processor 501 with access to the memory 502.

[0153] The electronic device also includes a power supply 503 for supplying power to various components. Preferably, the power supply 503 can be logically connected to the processor 501 through a power management system, so as to manage charging, discharging, power consumption and other functions through the power management system. The power supply 503 can also include one or more DC or AC power supplies, recharging systems, power supply device debugging circuits, power converters or inverters, power status indicators and other arbitrary components.

[0154] The electronic device may further include an input unit 504, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0155] Although not shown, the electronic device may further include a display unit, etc., which will not be described in detail herein. Specifically in this embodiment, the processor 501 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 502 according to the following instructions, and the processor 501 will run the application programs stored in the memory 502, thereby implementing the steps in any of the electronic expansion valve opening control methods provided in the embodiments of the present disclosure.

[0156] In the disclosed embodiment, the actual suction superheat in the refrigeration device is first obtained, and then, when the relationship between the actual suction superheat and the reference suction superheat does not meet the preset conditions, the target opening is determined based on the actual suction superheat and the reference suction superheat, and then the opening of the electronic expansion valve of the refrigeration device is adjusted to the target opening. In this way, the opening of the electronic expansion valve can be reasonably controlled based on the real-time suction superheat and the reference suction superheat, and the opening of the electronic expansion valve can be controlled in time, so as to quickly achieve system balance and improve the reliability of the refrigeration device.

[0157] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0158] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0159] To this end, the present disclosure provides a computer-readable storage medium having a computer program stored thereon. The computer program can be loaded by a processor to execute the steps in any one of the electronic expansion valve opening control methods provided in the present disclosure.

[0160] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0161] The computer-readable storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0162] Since the instructions stored in the computer-readable storage medium can execute the steps in any one of the electronic expansion valve opening control methods provided in the present disclosure, the beneficial effects that can be achieved by any one of the electronic expansion valve opening control methods provided in the present disclosure can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0163] The above is a detailed introduction to the opening control method, device, electronic device and computer-readable storage medium of an electronic expansion valve provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for controlling the opening of an electronic expansion valve, characterized in that: include: Obtain the actual suction superheat in the refrigeration equipment; When the relationship between the actual suction superheat and the reference suction superheat does not satisfy a preset condition, determining a target opening degree based on the actual suction superheat and the reference suction superheat; The opening degree of the electronic expansion valve of the refrigeration equipment is adjusted to the target opening degree.

2. The method according to claim 1, characterized in that The determining the target opening degree based on the actual suction superheat and the reference suction superheat comprises: determining a first difference and an actual opening degree of the electronic expansion valve, wherein the first difference represents a difference between an actual suction superheat and a reference suction superheat; Determining a target adjustment opening based on the first difference, a preset proportional coefficient and an integral time; The target opening is determined according to the target adjustment opening and the actual opening.

3. The method according to claim 2, characterized in that The step of determining the target adjustment opening based on the first difference, a preset proportional coefficient and an integral time includes: The target adjustment opening is determined based on the first difference corresponding to the current sampling moment, the first difference corresponding to the historical sampling moment, the preset proportional coefficient and the integration time.

4. The method according to claim 3, characterized in that The determining the target adjustment opening based on the first difference corresponding to the current sampling moment, the first difference corresponding to the historical sampling moment, the preset proportional coefficient and the integration time includes: Among them, PI(k) is the target adjustment opening, e(k) is the first difference corresponding to the current sampling time, e(k-1) is the first difference corresponding to the historical sampling time, K p is the proportionality coefficient, T i is the integration time, a1 is the proportional coefficient adjustment factor, and a2 is the integral term adjustment factor.

5. The method according to claim 2, characterized in that: Before determining the target adjustment opening based on the first difference, the preset proportional coefficient and the integral time, the method further includes: Determine the current operating condition information corresponding to the refrigeration equipment; The proportional coefficient and the integral time corresponding to the operating condition information are obtained.

6. The method according to claim 1, characterized in that The obtaining of the actual suction superheat in the refrigeration equipment comprises: Determine the suction temperature and suction pressure currently corresponding to the refrigeration equipment; Determining a saturation temperature associated with the suction pressure based on a preset mapping relationship; The absolute value of the difference between the suction air temperature and the saturation temperature is used as the actual suction air superheat.

7. The method according to claim 1, characterized in that Also includes: Adjusting the reference suction superheat based on the ambient temperature change information currently corresponding to the refrigeration equipment; Alternatively, the reference suction superheat is adjusted based on the load change information currently corresponding to the refrigeration equipment; Alternatively, the reference suction superheat is adjusted based on the load change information and the ambient temperature change information currently corresponding to the refrigeration equipment.

8. The method according to claim 1, characterized in that After adjusting the opening of the electronic expansion valve of the refrigeration equipment to the target opening, the method further includes: According to a specified period, determining whether the relationship between the actual suction superheat and the reference suction superheat satisfies the preset condition; When the relationship does not satisfy the preset condition, adjusting the opening of the electronic expansion valve; The above steps are executed repeatedly until the relationship satisfies the preset condition.

9. The method according to claim 1, characterized in that: Also includes: determining a target range associated with the reference suction superheat; When the value of the actual suction air superheat is within the target range, it is determined that the relationship between the actual suction air superheat and the reference suction air superheat satisfies the preset condition.

10. The method according to claim 1, characterized in that Also includes: When the relationship between the actual suction superheat and the reference suction superheat satisfies the preset condition, the opening of the electronic expansion valve is maintained.

11. An opening control device for an electronic expansion valve, characterized in that: include: An acquisition module, used for acquiring actual suction superheat in the refrigeration equipment; a determination module, configured to determine a target opening degree based on the actual suction superheat and the reference suction superheat when a relationship between the actual suction superheat and the reference suction superheat meets a preset condition; The regulating module is used to regulate the opening of the electronic expansion valve of the refrigeration equipment to the target opening.

12. An electronic device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps in the method according to any one of claims 1 to 10 when executing the computer program.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the method according to any one of claims 1 to 10 are implemented.

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