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

Abstract

The embodiment of the disclosure 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. The method comprises the following steps: acquiring an actual suction superheat degree in a refrigeration device; in the case that the relationship between the actual suction superheat degree and a reference suction superheat degree does not satisfy a preset condition, determining a target opening degree based on the actual suction superheat degree and the reference suction superheat degree; and adjusting the opening degree of the electronic expansion valve of the refrigeration device to the target opening degree. Therefore, the opening degree of the electronic expansion valve can be reasonably controlled based on the real-time suction superheat degree and the reference suction superheat degree, the opening degree of the electronic expansion valve can be controlled in time, the system balance can be quickly reached, and the reliability of the refrigeration device can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of intelligent control technology, specifically to an opening control method, device, electronic device, and computer-readable storage medium for an electronic expansion valve. Background Technology

[0002] Electronic expansion valves are important components in refrigeration equipment. They can automatically adjust the refrigerant flow rate based on real-time temperature and pressure signals, ensuring a more efficient and stable evaporation process for the refrigerant in the evaporator, and preventing excessive or insufficient refrigerant from flowing into the evaporator, thereby improving refrigeration efficiency.

[0003] Therefore, how to reasonably control the opening degree of the electronic expansion valve is an urgent problem to be solved. Summary of the Invention

[0004] This disclosure provides an electronic expansion valve opening control method, apparatus, electronic device, and computer-readable storage medium, aiming to at least partially solve one of the technical problems in the related art.

[0005] In a first aspect, embodiments of this disclosure provide a method for controlling the opening degree of an electronic expansion valve, the method comprising:

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

[0007] If the relationship between the actual intake superheat and the reference intake superheat does not meet the preset conditions, the target opening is determined based on the actual intake superheat and the reference intake superheat.

[0008] Adjust the opening degree of the electronic expansion valve of the refrigeration equipment to the target opening degree.

[0009] Secondly, embodiments of this disclosure also provide an opening control device for an electronic expansion valve, the device comprising:

[0010] The acquisition module is used to acquire the actual suction superheat in the refrigeration equipment;

[0011] The determination module is used to determine the target opening degree based on the actual inhalation superheat and the reference inhalation superheat, provided that the relationship between the actual inhalation superheat and the reference inhalation superheat meets a preset condition.

[0012] An adjustment module is used to adjust the opening degree of the electronic expansion valve of the refrigeration equipment to the target opening degree.

[0013] Thirdly, this disclosure also provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps in the above-described method for controlling the opening of an electronic expansion valve.

[0014] Fourthly, this disclosure also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps in the above-described method for controlling the opening of an electronic expansion valve.

[0015] Fifthly, embodiments of this disclosure also provide a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in the various optional implementations described in embodiments of this disclosure.

[0016] In this embodiment, the actual suction superheat in the refrigeration equipment is first obtained. Then, if the relationship between the actual suction superheat and the reference suction superheat does not meet a preset condition, a target opening degree is determined based on the actual suction superheat and the reference suction superheat. The opening degree of the electronic expansion valve of the refrigeration equipment is then adjusted to the target opening degree. Therefore, based on the real-time suction superheat and the reference suction superheat, the opening degree of the electronic expansion valve can be reasonably controlled, allowing for timely opening control of the electronic expansion valve, quickly achieving system balance, and improving the reliability of the refrigeration equipment.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used 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 creative effort.

[0019] Figure 1 This is a flowchart illustrating the opening control method of the electronic expansion valve provided in the first embodiment of this disclosure;

[0020] Figure 2 This is a flowchart illustrating the opening control method of the electronic expansion valve provided in the second embodiment of this disclosure;

[0021] Figure 3This is an exemplary opening control flowchart provided in an embodiment of this disclosure;

[0022] Figure 4 This is a schematic diagram of the opening control device for the electronic expansion valve provided in this embodiment;

[0023] Figure 5 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this disclosure. Detailed Implementation

[0024] Some embodiments of this disclosure will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but can be changed as will become apparent upon understanding this disclosure, except for operations that must be performed in a particular order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0025] The embodiments described in the following examples of this disclosure are not representative of all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

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

[0027] In this embodiment, the "electronic expansion valve opening control device" will be used as the executing entity to describe the method for controlling the opening of the electronic expansion valve, hereinafter referred to as "device," and is not limited thereto. It should be noted that the order of description of the following embodiments is not intended to limit the priority of the embodiments.

[0028] Figure 1 This is a flowchart illustrating the opening control method of an electronic expansion valve according to the first embodiment of this disclosure.

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

[0030] Step 101: Obtain the actual suction superheat in the refrigeration equipment.

[0031] The refrigeration equipment can be any equipment used to lower the temperature, such as refrigerators, air conditioners, cold storage, etc., and there is no limitation on it.

[0032] The suction superheat is the difference between the compressor's suction temperature and its evaporation temperature. It's important to note that the compressor's suction temperature being higher than its evaporation temperature is called suction superheat. When refrigerant vapor evaporates in the evaporator, if it continues to absorb heat, its temperature will exceed the evaporation temperature, forming superheated vapor. The temperature difference between this superheated vapor and the evaporation temperature when it enters the compressor is the suction superheat.

[0033] The actual intake superheat can be the intake superheat that is actually measured at the moment.

[0034] One possible approach is to first measure the suction temperature and evaporation temperature separately, and then use the temperature difference between the suction and evaporation temperatures as the actual suction superheat. Alternatively, a thermometer or temperature sensor can be used to measure the temperature at the compressor suction port as the suction temperature. Alternatively, when determining the evaporation temperature, the pressure inside the evaporator can be measured first, and then the saturation temperature at the corresponding pressure can be found to obtain the evaporation temperature; this is not limited here.

[0035] As another possible approach, the current suction temperature and suction pressure of the refrigeration equipment can be determined first. Then, based on a preset mapping relationship, the saturation temperature associated with the suction pressure can be determined. Finally, 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 is the temperature at which the compressor of a refrigeration device draws in refrigerant. It can be measured using a temperature sensor and is typically affected by the operating status of the equipment and external environmental conditions.

[0037] Suction pressure is the pressure of the refrigerant on the compressor's suction side. It can be measured using a pressure sensor and is affected by various factors such as refrigerant flow rate, compressor speed, ambient temperature, and the type of refrigerant. Suction pressure is typically expressed in Pascals (Pa) or bar.

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

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

[0040] Understandably, a mapping relationship between saturation temperature and suction pressure can be established in advance. This mapping relationship reflects the saturation temperature of the refrigerant at different suction pressures. For example, for refrigerant R22, a table corresponding to pressure and saturation temperature can be established based on its pressure-temperature characteristic curve to quickly determine the saturation temperature in practical applications.

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

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

[0043] Step 102: If the relationship between the actual intake superheat and the reference intake superheat does not meet the preset conditions, determine the target opening based on the actual intake superheat and the reference intake superheat.

[0044] The reference intake superheat can be a pre-set reference value for intake superheat, or an ideal intake superheat value pre-set according to system design and operating requirements.

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

[0046] Among them, the preset conditions can be pre-set conditions that do not adjust the opening of the electronic expansion valve.

[0047] It should be noted that the actual suction superheat can be compared with the reference suction superheat to determine whether the current operating status of the refrigeration equipment meets expectations. For example, if the actual suction superheat differs significantly from the reference suction superheat, it indicates that there may be a problem with the system's operating status, and adjustments are needed.

[0048] The preset conditions can be set according to the system's performance and stability requirements. For example, an allowable deviation range can be set. When the difference between the actual intake superheat and the reference intake superheat exceeds this range, the relationship is considered not to meet the preset conditions.

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

[0050] As one possible approach, a target range associated with a reference inhalation superheat can be determined first, and then, if the actual inhalation superheat value is within the target range, the relationship between the actual inhalation superheat and the reference inhalation superheat can be determined to satisfy a preset condition.

[0051] The target range can be a range determined based on the reference intake superheat.

[0052] For example, if the reference inhalation superheat is M, then [Ma, M+a] can be used as the target range, which is not limited here. Here, a can be 1℃, or 1.5℃, or 0.5℃, which is not limited here.

[0053] For example, if the reference intake superheat M is 10°C, then [9°C, 11°C] can be used as the target range. If the actual intake superheat is 10.5°C, which is within the target range, then the relationship between the actual intake superheat and the reference intake superheat can be considered to meet the preset conditions. For example, if the actual intake superheat is 8°C, which is not within the target range, then the relationship between the actual intake superheat and the reference intake superheat can be considered to not meet the preset conditions, and this is not limited here.

[0054] Optionally, if the relationship between the actual intake superheat and the reference intake superheat meets preset conditions, the opening of the electronic expansion valve is maintained, meaning that the opening of the electronic expansion valve does not need to be adjusted. If the preset conditions are not met, the target opening needs to be calculated, and the opening of the electronic expansion valve is then adjusted based on the target opening.

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

[0056] It's important to note that changes in ambient temperature directly affect the operating status of refrigeration equipment. When the ambient temperature rises, the load on the refrigeration equipment increases, requiring a larger refrigerant flow to maintain the same cooling effect. At the same time, the suction temperature will also rise accordingly, potentially causing changes in suction superheat. For example, in hot summer weather, the refrigeration equipment needs to work harder to lower the indoor temperature, and the suction temperature may be higher than in winter.

[0057] Therefore, the reference intake superheat can be appropriately adjusted based on ambient temperature changes. For example, a table or function relating ambient temperature changes to the reference intake superheat can be pre-established. When the ambient temperature changes, the reference intake superheat is adjusted according to this table or function; no specific limitations are imposed here.

[0058] For example, if the ambient temperature changes by 4°C, the reference suction superheat will increase by a certain value accordingly, without any specific limitation. This allows the refrigeration equipment to maintain good operating conditions under different ambient temperatures.

[0059] Optionally, the reference suction superheat can be adjusted based on the current load change information of the refrigeration equipment.

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

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

[0062] For example, when the load on a refrigeration unit increases, more cooling capacity is needed to maintain the set temperature, thus requiring an increase in refrigerant flow to improve heat exchange efficiency. However, this increase in refrigerant flow leads to an increase in suction temperature, which in turn affects suction superheat.

[0063] Understandably, a relationship model between the load change information of 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 empirical formulas; no limitation is made 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 can be adjusted based on the current load change information and ambient temperature change information of the refrigeration equipment.

[0066] Understandably, a reference intake 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, taking the load change magnitude, ambient temperature change, and other relevant factors as input variables, and the adjustment value of the reference intake superheat as the output variable.

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

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

[0069] Therefore, by comprehensively considering the current load change information of the refrigeration equipment and the ambient temperature change information 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: Adjust the opening of the electronic expansion valve of the refrigeration equipment to the target opening.

[0071] The electronic expansion valve is a control device that precisely regulates the flow of refrigerant and is a key component in refrigeration equipment. It regulates the refrigerant flow by receiving signals from the controller and changing the valve opening. It typically consists of a valve body, valve core, coil, and sensor.

[0072] Optionally, the device can 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; this is not limited to this.

[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 can be increased from 30% to 50%, without any limitation.

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

[0075] As one possible approach, one can first determine whether the relationship between the actual intake superheat and the reference intake superheat meets a preset condition according to a specified cycle. Then, if the relationship does not meet the preset condition, the opening of the electronic expansion valve can be adjusted, and the above steps can be repeated until the relationship meets the preset condition.

[0076] The specified period can be 10 seconds, or it can be 11 seconds or 9 seconds; there is no limitation here.

[0077] For example, if the specified period is 10 seconds, the current actual intake superheat can be compared with the reference intake superheat every 10 seconds to determine if the preset conditions are met. If not, the opening of the electronic expansion valve can be adjusted based on the calculated target opening. This adjustment is performed every 10 seconds and repeated until the relationship between the actual intake superheat and the reference intake superheat meets the preset conditions. Therefore, by continuously adjusting the opening of the electronic expansion valve, the relationship between the actual intake superheat and the reference intake superheat can be made to meet the preset conditions.

[0078] In this embodiment, the actual suction superheat in the refrigeration equipment is first obtained. Then, if the relationship between the actual suction superheat and the reference suction superheat does not meet a preset condition, a target opening degree is determined based on the actual suction superheat and the reference suction superheat. The opening degree of the electronic expansion valve of the refrigeration equipment is then adjusted to the target opening degree. Therefore, based on the real-time suction superheat and the reference suction superheat, the opening degree of the electronic expansion valve can be reasonably controlled, allowing for timely opening control of the electronic expansion valve, quickly achieving system balance, and improving the reliability of the refrigeration equipment.

[0079] Figure 2 This is a flowchart illustrating the opening control method of an electronic expansion valve according to the second embodiment of this disclosure.

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

[0081] Step 201: Obtain the actual suction superheat in the refrigeration equipment.

[0082] It should be noted that the specific implementation of step 201 can be referred to the above embodiments, and will not be repeated here.

[0083] Step 202: If the relationship between the actual intake superheat and the reference intake superheat does not meet the preset conditions, determine the first difference and the actual opening degree of the electronic expansion valve.

[0084] The first difference represents the difference between the actual intake superheat and the reference intake superheat.

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

[0086] For example, if the actual inhalation superheat is K1 and the reference inhalation superheat is K2, then K1-K2 can be used as the first difference, without any restrictions.

[0087] It should be noted that, for determining whether the relationship between the actual intake superheat and the reference intake superheat does not meet the preset conditions, please refer to the description in the above embodiments, which will not be repeated here.

[0088] Step 203: Determine the target adjustment opening based on the first difference, the preset proportional coefficient, and the integral time.

[0089] The target adjustment opening can be the amount of adjustment to the opening of the electronic expansion valve.

[0090] As one implementation method, in this embodiment of the 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 gain and integral time can be parameter values ​​in the controller, or they can be fixed values ​​determined according to the actual application scenario; no limitation is made here. The proportional gain and integral time have different effects on the controller.

[0092] The proportional gain represents the proportional relationship between the change in the controller's 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 setpoint) changes, the controller adjusts its output according to the proportional gain to reduce the error.

[0093] The magnitude of the proportional gain determines the controller's sensitivity to error changes: a larger proportional gain results in a faster response to error changes, but may lead to excessive overshoot and oscillations in the system. A smaller proportional gain results in a smoother response to error changes, which contributes to system stability, but may reduce the system's response speed.

[0094] Integral time represents the speed at which the controller responds to error accumulation. In a control system, the integral term is a measure of error accumulation over time, taking into account the changes in error over a period of time. The longer the integral time, the slower the controller responds to error accumulation; the shorter the integral time, the faster the controller responds to error accumulation.

[0095] One possible approach is to determine the target adjustment opening based on the first difference corresponding to the current sampling time, the first difference corresponding to the historical sampling time, the preset proportional coefficient, and the integration time.

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

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

[0098]

[0099] Where 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, and K p T is the proportionality coefficient. i The time for integration.

[0100] Where a1 is the proportionality coefficient adjustment factor, which can be used to adjust the coefficient of the proportional term. This is achieved by multiplying [e(k) - e(k-1)] by K. p Dividing by "a1" afterwards can scale the effect of the proportional term to a certain extent. For example, in actual debugging, if the effect of the proportional term is too large, it can easily lead to 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, and there is no limitation here.

[0101] Here, a2 is the integral term adjustment factor, which can be used to adjust the strength of the integral term. The function of the integral term is to eliminate the steady-state error of the system, but if the integral action is too strong, it may lead to a slow system response or overshoot. This integral term adjustment factor can control the contribution of the integral term in the calculation of the target control opening, so as to achieve a better control effect; no limitation is imposed here. Optionally, the value of a2 can be 10; no limitation is imposed here.

[0102] One possible approach is to first determine the current operating condition information of the refrigeration equipment, and then obtain the proportional coefficient and integral time corresponding to the operating condition information.

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

[0104] Optionally, the proportional coefficient and integral time can be obtained based on the currently determined working conditions, for example, through a pre-established parameter table, empirical formula, or online adaptive algorithm.

[0105] For example, a different set of proportional coefficients and integral times can be determined based on different cooling load ranges and ambient temperature ranges. In actual operation, based on real-time monitored operating information, the corresponding parameters (proportional coefficients and integral times) are selected to calculate the target adjustment opening, without any limitations here. Therefore, by determining the target adjustment opening in this way, the electronic expansion valve of the refrigeration equipment can adaptively adjust according to different operating conditions, improving the system's stability, accuracy, and energy efficiency.

[0106] Step 204: Adjust the opening degree according to the target degree and the actual opening degree to determine the target opening degree.

[0107] Optionally, the target opening degree can be obtained by adding the target opening degree and the actual opening degree.

[0108] For example, if the target opening is 10% and the actual opening is 40%, then the target opening is 50%, without any limitation.

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

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

[0111] It should be noted that the specific implementation of step 205 can be referred to the above embodiments, and will not be repeated here.

[0112] In this embodiment, the actual suction superheat in the refrigeration equipment is first obtained. Then, if the relationship between the actual suction superheat and the reference suction superheat does not meet a preset condition, a first difference and the actual opening of the electronic expansion valve are determined. Next, based on the first difference, a preset proportional coefficient, and an integral time, a target adjustment opening is determined. Then, based on the target adjustment opening and the actual opening, the target opening is determined, and the opening of the electronic expansion valve of the refrigeration equipment is adjusted to the target opening. Thus, by monitoring and adjusting the actual suction superheat in real time to make it close to the reference suction superheat, the refrigeration system can be ensured to operate in optimal condition, which helps to improve the system's refrigeration efficiency and energy efficiency ratio, and reduce energy consumption. When the refrigeration equipment experiences load changes or ambient temperature changes, the opening of the electronic expansion valve can be adjusted in a timely manner, allowing the system to quickly return to a stable state, reducing system fluctuations and oscillations, and improving the system's reliability and stability.

[0113] Figure 3 This is an exemplary flowchart of opening control provided in an embodiment of this disclosure. For example... Figure 3As shown, this device can first obtain the current suction temperature and suction pressure of the refrigeration equipment, as well as the actual opening degree of the electronic expansion valve. Then, based on the mapping relationship, it determines the saturation temperature corresponding to the suction pressure. Afterwards, T can be calculated. 实际吸气过热度 And determine T 实际吸气过热度 Is it in T? 目标吸气过热度 Within ±1℃. 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, and T is judged again. 实际吸气过热度 Is it in T? 目标吸气过热度 Make the corresponding adjustments within the range of ±1℃.

[0114] To facilitate better implementation of the electronic expansion valve opening control method of this disclosure, this disclosure also provides an electronic expansion valve opening control device based on the above-described electronic expansion valve opening control method. The meanings of the terms used are the same as in the above-described electronic expansion valve opening control method, and specific implementation details can be found in the description of the method embodiments.

[0115] Please see Figure 4 , Figure 4 This is a schematic diagram of the opening control device 400 for an electronic expansion valve provided in this embodiment of the present disclosure. The electronic expansion valve opening control device 400 includes:

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

[0117] The first determining module 420 is used to determine the target opening degree based on the actual intake superheat and the reference intake superheat when the relationship between the actual intake superheat and the reference intake superheat meets the preset conditions.

[0118] The adjustment module 430 is used to adjust the opening degree of the electronic expansion valve of the refrigeration equipment to the target opening degree.

[0119] Optionally, the determining module includes:

[0120] The first determining unit is used to determine the first difference and the actual opening degree of the electronic expansion valve, wherein the first difference represents the difference between the actual intake superheat and the reference intake superheat.

[0121] The second determining unit is used to determine the target adjustment opening based on the first difference, the preset proportional coefficient, and the integral time;

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

[0123] Optionally, the second determining unit includes:

[0124] A subunit is defined to determine the target adjustment opening based on the first difference corresponding to the current sampling time, the first difference corresponding to the historical sampling time, the preset proportional coefficient, and the integral time.

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

[0126]

[0127] Where 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, and K p T is the proportionality coefficient. i For 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 also used for:

[0129] Determine the current operating status information of the refrigeration equipment;

[0130] Obtain the proportional coefficient and integral time corresponding to the operating condition information.

[0131] Optionally, the acquisition module 410 is specifically used for:

[0132] Determine the current suction temperature and suction pressure of the refrigeration equipment;

[0133] Based on a preset mapping relationship, the saturation temperature associated with the inhalation pressure is determined;

[0134] The absolute value of the difference between the intake temperature and the saturation temperature is taken as the actual intake superheat.

[0135] Optionally, the device may also include:

[0136] The first adjustment module is used to adjust the reference intake superheat based on the ambient temperature change information corresponding to the current cooling equipment.

[0137] The second adjustment module is used to adjust the reference suction superheat based on the load change information of 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 of the refrigeration equipment.

[0139] Optionally, the adjustment module 430 is also used for:

[0140] According to the specified cycle, determine whether the relationship between the actual inhalation superheat and the reference inhalation superheat meets the preset condition;

[0141] If the relationship does not meet the preset conditions, the opening degree of the electronic expansion valve is adjusted.

[0142] Repeat the above steps until the relationship satisfies the preset condition.

[0143] Optionally, the device may also include:

[0144] The second determining module is used to determine a target range associated with the reference intake superheat.

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

[0146] Optionally, the device may also include:

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

[0148] In this embodiment, the actual suction superheat in the refrigeration equipment is first obtained. Then, if the relationship between the actual suction superheat and the reference suction superheat does not meet a preset condition, a target opening degree is determined based on the actual suction superheat and the reference suction superheat. The opening degree of the electronic expansion valve of the refrigeration equipment is then adjusted to the target opening degree. Therefore, based on the real-time suction superheat and the reference suction superheat, the opening degree of the electronic expansion valve can be reasonably controlled, allowing for timely opening control of the electronic expansion valve, quickly achieving system balance, and improving the reliability of the refrigeration equipment.

[0149] In addition, this disclosure also provides an electronic device, such as Figure 5 As shown, it illustrates a schematic diagram of the structure of the electronic device involved in this 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 understand that... Figure 5 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein:

[0151] The processor 501 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 502, and by calling data stored in the memory 502, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. 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 handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the 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. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, 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 high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. 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 that supplies power to various components. Preferably, the power supply 503 can be logically connected to the processor 501 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 503 may also include one or more DC or AC power supplies, recharging systems, power equipment debugging circuits, power converters or inverters, power status indicators, and other arbitrary components.

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

[0155] Although not shown, the electronic device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 501 in the electronic device loads 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 runs 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 this disclosure.

[0156] In this embodiment, the actual suction superheat in the refrigeration equipment is first obtained. Then, if the relationship between the actual suction superheat and the reference suction superheat does not meet a preset condition, a target opening degree is determined based on the actual suction superheat and the reference suction superheat. The opening degree of the electronic expansion valve of the refrigeration equipment is then adjusted to the target opening degree. Therefore, based on the real-time suction superheat and the reference suction superheat, the opening degree of the electronic expansion valve can be reasonably controlled, allowing for timely opening control of the electronic expansion valve, quickly achieving system balance, and improving the reliability of the refrigeration equipment.

[0157] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0158] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can 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 storing a computer program that can be loaded by a processor to execute the steps in any of the electronic expansion valve opening control methods provided in the present disclosure.

[0160] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

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

[0162] Since the instructions stored in the computer-readable storage medium can execute the steps in any of the electronic expansion valve opening control methods provided in this disclosure, the beneficial effects that any of the electronic expansion valve opening control methods provided in this disclosure can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0163] The opening control method, device, electronic equipment, and computer-readable storage medium of an electronic expansion valve provided in this disclosure have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for controlling the opening degree of an electronic expansion valve, characterized in that, include: Obtain the actual suction superheat in the refrigeration equipment; If the relationship between the actual intake superheat and the reference intake superheat does not meet the preset conditions, the target opening is determined based on the actual intake superheat and the reference intake superheat. Adjust the opening degree of the electronic expansion valve of the refrigeration equipment to the target opening degree; The determination of the target air opening based on the actual inhalation superheat and the reference inhalation superheat includes: Determine the first difference and the actual opening degree of the electronic expansion valve, wherein the first difference represents the difference between the actual intake superheat and the reference intake superheat; Based on the first difference, the preset proportional coefficient, and the integral time, the target adjustment opening is determined; The target opening is determined based on the target opening and the actual opening. 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 time, the first difference corresponding to the historical sampling time, the preset proportional coefficient, and the integral time.

2. The method according to claim 1, characterized in that, The step of determining the target adjustment opening based on the first difference corresponding to the current sampling time, the first difference corresponding to the historical sampling time, the preset proportional coefficient, and the integral time includes: PI(k)= [e(k)-e(k-1)]+ e(k) Where PI(k) is the target adjustment opening, e(k) is the first difference corresponding to the current sampling time, and e(k-1) is the first difference corresponding to the historical sampling time. This is the proportionality coefficient. For the integration time, a1 is the proportional coefficient adjustment factor, and a2 is the integral term adjustment factor.

3. The method according to claim 1, characterized in that, Before determining the target adjustment opening based on the first difference, a preset proportional coefficient, and an integral time, the method further includes: Determine the current operating status information of the refrigeration equipment; Obtain the proportional coefficient and integral time corresponding to the operating condition information.

4. The method according to claim 1, characterized in that, The acquisition of the actual suction superheat in the refrigeration equipment includes: Determine the current suction temperature and suction pressure of the refrigeration equipment; Based on a preset mapping relationship, the saturation temperature associated with the inhalation pressure is determined; The absolute value of the difference between the intake temperature and the saturation temperature is taken as the actual intake superheat.

5. The method according to claim 1, characterized in that, Also includes: Based on the ambient temperature change information corresponding to the current refrigeration equipment, the reference intake superheat is adjusted; Alternatively, the reference suction superheat can be adjusted based on the current load change information of the refrigeration equipment. Alternatively, the reference intake superheat can be adjusted based on the current load change information and ambient temperature change information of the refrigeration equipment.

6. 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 the specified cycle, determine whether the relationship between the actual inhalation superheat and the reference inhalation superheat meets the preset condition; If the relationship does not meet the preset conditions, the opening degree of the electronic expansion valve is adjusted. Repeat the above steps until the relationship satisfies the preset condition.

7. The method according to claim 1, characterized in that, Also includes: Determine the target range associated with the reference intake superheat; If the actual inhalation superheat value is within the target range, the relationship between the actual inhalation superheat and the reference inhalation superheat is determined to satisfy the preset condition.

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

9. An opening control device for an electronic expansion valve, characterized in that, include: The acquisition module is used to acquire the actual suction superheat in the refrigeration equipment; The determination module is used to determine the target opening degree based on the actual inhalation superheat and the reference inhalation superheat, provided that the relationship between the actual inhalation superheat and the reference inhalation superheat meets a preset condition. An adjustment module is used to adjust the opening degree of the electronic expansion valve of the refrigeration equipment to the target opening degree; The determining module includes: The first determining unit is used to determine the first difference and the actual opening degree of the electronic expansion valve, wherein the first difference represents the difference between the actual intake superheat and the reference intake superheat. The second determining unit is used to determine the target adjustment opening based on the first difference, the preset proportional coefficient, and the integral time; The third determining unit is used to determine the target opening degree based on the target adjustment opening degree and the actual opening degree; The second determining unit includes: A subunit is defined to determine the target adjustment opening based on the first difference corresponding to the current sampling time, the first difference corresponding to the historical sampling time, the preset proportional coefficient, and the integral time.

10. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method as described in any one of claims 1-8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method as described in any one of claims 1-8.

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