Method and device for adjusting the opening degree of air conditioning electronic expansion valve

Abstract

This application relates to a method and apparatus for adjusting the opening of an electronic expansion valve in an air conditioner. The method includes: determining a target suction superheat based on the detected outer and inner ring temperatures of the air conditioner; determining an actual suction superheat based on the detected suction temperature and suction pressure of the air conditioner; determining an adjustment variable for the electronic expansion valve based on the target suction superheat and the actual suction superheat; and controlling the electronic expansion valve to adjust its opening according to the adjustment variable. This application aims to prevent unit malfunctions.

Description

Technical Field

[0001] This application relates to the field of air conditioning, and more particularly to a method and apparatus for adjusting the opening degree of an air conditioning electronic expansion valve. Background Technology

[0002] Currently, when the air conditioning industry uses electronic expansion valves as throttling devices, it mainly uses electronic expansion valves with fixed suction temperature and superheat regulation. However, as the operating environment of the units becomes harsher and the required operating temperature range of the units becomes wider, using electronic expansion valves with fixed suction temperature regulation can easily cause unit malfunctions. For example, the unit is prone to liquid accumulation under low pressure differential conditions, and the exhaust temperature is too high under high pressure differential conditions. When the outer ring temperature is high, the unit's energy efficiency is low.

[0003] There is currently no good solution to the problems that air conditioners are prone to malfunction during operation. Summary of the Invention

[0004] This application provides a method and device for adjusting the opening degree of an air conditioner electronic expansion valve to solve the problem of easy malfunctions during air conditioner operation.

[0005] In a first aspect, this application provides a method for adjusting the opening degree of an air conditioning electronic expansion valve, the method comprising:

[0006] The target intake superheat is determined based on the detected outer and inner ring temperatures of the air conditioner.

[0007] The actual intake superheat is determined based on the detected intake temperature and intake pressure of the air conditioner.

[0008] The adjustment variable of the electronic expansion valve is determined based on the target intake superheat and the actual intake superheat.

[0009] The electronic expansion valve is controlled to adjust its opening degree according to the adjustment variable.

[0010] Furthermore, determining the target intake superheat based on the detected outer and inner ring temperatures of the air conditioner includes:

[0011] After the air conditioner is powered on, the target opening degree of the electronic expansion valve is determined based on the detected outer and inner ring temperatures.

[0012] After controlling the electronic expansion valve to operate at the target opening for a preset time, the target intake superheat is determined based on the target opening, the outer ring temperature, the inner ring temperature, and the initial intake superheat.

[0013] Furthermore, determining the target opening degree of the electronic expansion valve based on the detected outer ring temperature and inner ring temperature includes:

[0014] Obtain the outer ring temperature, inner ring temperature, initial opening of the electronic expansion valve, outer ring temperature coefficient, and inner ring temperature coefficient of the air conditioner;

[0015] Determine the first product value of the outer ring temperature coefficient and the outer ring temperature, and determine the second product value of the inner ring temperature coefficient and the inner ring temperature;

[0016] The target opening of the electronic expansion valve is obtained by adding the first product value to the initial opening and then subtracting the second product value.

[0017] Furthermore, determining the target intake superheat based on the target opening degree, the outer ring temperature, the inner ring temperature, and the initial intake superheat includes:

[0018] Obtain the outer loop adjustment coefficient, the inner loop adjustment coefficient, and the initial intake superheat of the electronic expansion valve;

[0019] Determine the third product value of the outer ring adjustment coefficient and the outer ring temperature, and determine the fourth product value of the inner ring adjustment coefficient and the inner ring temperature;

[0020] The target inhalation superheat is obtained by subtracting the third product value from the initial inhalation superheat and adding the fourth product value.

[0021] Furthermore, determining the actual intake superheat based on the detected intake temperature and pressure of the air conditioner includes:

[0022] The suction temperature of the compressor suction port is periodically obtained by a suction temperature sensor, and the suction pressure of the compressor suction port is periodically obtained by a suction pressure sensor.

[0023] The inhalation saturation temperature corresponding to the inhalation pressure is determined according to a preset mapping table.

[0024] The difference between the intake temperature and the intake saturation temperature is taken as the actual intake superheat.

[0025] Furthermore, determining the adjustment variable of the electronic expansion valve based on the target intake superheat and the actual intake superheat includes:

[0026] Obtain the first actual inhalation superheat in the current period n and the second actual inhalation superheat in period n-1;

[0027] Determine a first difference between the target inhalation superheat and the first actual inhalation superheat, and a second difference between the target inhalation superheat and the second actual inhalation superheat;

[0028] If the target difference between the first difference and the second difference exceeds the preset range, then the third difference between the target inhalation superheat and the third actual inhalation superheat in cycle n-2;

[0029] The adjustment variable of the electronic expansion valve is determined based on the preset coefficient, the first difference, the second difference, and the third difference of the electronic expansion valve.

[0030] Further, after determining the first difference between the target inhalation superheat and the first actual inhalation superheat, the method includes:

[0031] If the target difference is within the preset range, then the adjustment variable is determined to be zero.

[0032] Secondly, a device for adjusting the opening degree of an air conditioning electronic expansion valve is provided, the device comprising:

[0033] The first determining module is used to determine the target intake superheat based on the detected outer and inner ring temperatures of the air conditioner.

[0034] The second determining module is used to determine the actual intake superheat based on the detected intake temperature and intake pressure of the air conditioner.

[0035] The third determining module is used to determine the adjustment variable of the electronic expansion valve based on the target intake superheat and the actual intake superheat.

[0036] The control module is used to control the electronic expansion valve to adjust its opening degree according to the adjustment variable.

[0037] Thirdly, this application provides an air conditioner with electronic expansion valve opening adjustment, comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is configured to: a method for adjusting the opening of the air conditioner's electronic expansion valve, the method comprising:

[0038] The target intake superheat is determined based on the detected outer and inner ring temperatures of the air conditioner.

[0039] The actual intake superheat is determined based on the detected intake temperature and intake pressure of the air conditioner.

[0040] The adjustment variable of the electronic expansion valve is determined based on the target intake superheat and the actual intake superheat.

[0041] The electronic expansion valve is controlled to adjust its opening degree according to the adjustment variable.

[0042] Furthermore, determining the target intake superheat based on the detected outer and inner ring temperatures of the air conditioner includes:

[0043] After the air conditioner is powered on, the target opening degree of the electronic expansion valve is determined based on the detected outer and inner ring temperatures.

[0044] After controlling the electronic expansion valve to operate at the target opening for a preset time, the target intake superheat is determined based on the target opening, the outer ring temperature, the inner ring temperature, and the initial intake superheat.

[0045] Furthermore, determining the target opening degree of the electronic expansion valve based on the detected outer ring temperature and inner ring temperature includes:

[0046] Obtain the outer ring temperature, inner ring temperature, initial opening of the electronic expansion valve, outer ring temperature coefficient, and inner ring temperature coefficient of the air conditioner;

[0047] Determine the first product value of the outer ring temperature coefficient and the outer ring temperature, and determine the second product value of the inner ring temperature coefficient and the inner ring temperature;

[0048] The target opening of the electronic expansion valve is obtained by adding the first product value to the initial opening and then subtracting the second product value.

[0049] Furthermore, determining the target intake superheat based on the target opening degree, the outer ring temperature, the inner ring temperature, and the initial intake superheat includes:

[0050] Obtain the outer loop adjustment coefficient, the inner loop adjustment coefficient, and the initial intake superheat of the electronic expansion valve;

[0051] Determine the third product value of the outer ring adjustment coefficient and the outer ring temperature, and determine the fourth product value of the inner ring adjustment coefficient and the inner ring temperature;

[0052] The target inhalation superheat is obtained by subtracting the third product value from the initial inhalation superheat and adding the fourth product value.

[0053] Furthermore, determining the actual intake superheat based on the detected intake temperature and pressure of the air conditioner includes:

[0054] The suction temperature of the compressor suction port is periodically obtained by a suction temperature sensor, and the suction pressure of the compressor suction port is periodically obtained by a suction pressure sensor.

[0055] The inhalation saturation temperature corresponding to the inhalation pressure is determined according to a preset mapping table.

[0056] The difference between the intake temperature and the intake saturation temperature is taken as the actual intake superheat.

[0057] Furthermore, determining the adjustment variable of the electronic expansion valve based on the target intake superheat and the actual intake superheat includes:

[0058] Obtain the first actual inhalation superheat in the current period n and the second actual inhalation superheat in period n-1;

[0059] Determine a first difference between the target inhalation superheat and the first actual inhalation superheat, and a second difference between the target inhalation superheat and the second actual inhalation superheat;

[0060] If the target difference between the first difference and the second difference exceeds the preset range, then the third difference between the target inhalation superheat and the third actual inhalation superheat in cycle n-2;

[0061] The adjustment variable of the electronic expansion valve is determined based on the preset coefficient, the first difference, the second difference, and the third difference of the electronic expansion valve.

[0062] Further, after determining the first difference between the target inhalation superheat and the first actual inhalation superheat, the method includes:

[0063] If the target difference is within the preset range, then the adjustment variable is determined to be zero.

[0064] Furthermore, after controlling the electronic expansion valve to adjust its opening degree according to the adjustment variable, the method further includes:

[0065] Upon receiving a shutdown signal, the electronic expansion valve is closed, and all other components except the electronic expansion valve are kept running normally.

[0066] Fourthly, this application also provides a computer storage medium storing computer-executable instructions for executing the method for adjusting the opening degree of the air conditioning electronic expansion valve as described in any of the preceding claims of this application.

[0067] Compared with the prior art, the technical solution provided in this application has the following advantages: the target intake superheat is determined by the actual outer ring temperature and inner ring temperature, and the actual intake superheat is determined by the actual intake temperature and intake pressure. Finally, the opening of the electronic expansion valve is adjusted according to the target intake superheat and the actual intake superheat. Compared with the prior art, this application avoids fixing the superheat only by the intake temperature, but continuously adjusts the superheat according to the actual inner and outer ring temperatures, intake temperature and intake pressure, so that the opening of the electronic expansion valve can be adjusted to adapt to a wider range of operating temperature of the unit and avoid unit failure. Attached Figure Description

[0068] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0069] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0070] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0071] Figure 1 The system schematic diagram of the condensing unit provided in the embodiments of this application;

[0072] Figure 2 A flowchart illustrating a method for adjusting the opening degree of an air conditioning electronic expansion valve, provided in an embodiment of this application;

[0073] Figure 3 A schematic diagram of the structure of an air conditioning electronic expansion valve opening adjustment device provided in an embodiment of this application;

[0074] Figure 4 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this application.

[0075] Among them, 1 is the compressor, 2 is the oil separator, 3 is the condenser, 4 is the electronic expansion valve, 5 is the evaporator, 6 is the vapor-liquid separator, and 7 is the controller. Detailed Implementation

[0076] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0077] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below.

[0078] This application provides a system schematic diagram of a condensing unit, such as... Figure 1 As shown, the condensing unit includes a compressor 1, an oil separator 2, a condenser 3, an electronic expansion valve 4, an evaporator 5, a vapor-liquid separator 6, and a controller 7. An outer loop temperature sensor is installed on the return air side of the condenser, a suction temperature sensor and a suction pressure sensor are installed at the compressor suction outlet, and an inner loop temperature sensor is installed on the evaporator.

[0079] The outer ring temperature sensor is used to detect the outer ring temperature. Inhalation temperature sensor is used to detect inhalation temperature. Inspiratory pressure sensor is used to detect inspiratory pressure. The inner ring temperature sensor is used to detect the intake temperature. .

[0080] The inverter compressor outputs low-temperature, low-pressure refrigerant. The oil separator separates the oil dissolved in the refrigerant. The high-temperature, high-pressure gaseous refrigerant becomes room-temperature, high-pressure liquid refrigerant after passing through the condenser. The liquid refrigerant then passes through the electronic expansion valve and becomes a low-temperature, low-pressure gas-liquid mixture. This gas-liquid mixture evaporates in the evaporator to become a low-temperature, low-pressure gaseous refrigerant. Gas-liquid separation is performed in the gas-liquid separator to prevent incomplete evaporation from causing liquid refrigerant to return to the compressor and damage it. The gaseous refrigerant returns to the inlet of the inverter compressor.

[0081] The following will describe in detail, with reference to specific embodiments, a method for adjusting the opening degree of an air conditioning electronic expansion valve provided in this application, such as... Figure 2 As shown, the specific steps are as follows:

[0082] Step 201: Determine the target intake superheat based on the detected outer and inner ring temperatures of the air conditioner.

[0083] When the air conditioning unit is powered on, the air conditioner detects the outer ambient temperature through the outer ambient temperature sensor. The inner ring temperature is detected by an inner ring temperature sensor. The target opening degree of the electronic expansion valve is determined based on the detected outer and inner ring temperatures.

[0084] After receiving the start-up command, the electronic expansion valve operates at the target opening, and other components operate according to their original logic. After the electronic expansion valve operates at the target opening for a preset time, the controller determines the target suction superheat based on the target opening, outer ring temperature, inner ring temperature, and initial suction superheat.

[0085] Step 202: Determine the actual intake superheat based on the detected intake temperature and intake pressure of the air conditioner.

[0086] The air conditioner detects the intake temperature using an intake temperature sensor. Inspiratory pressure is detected by an inspiratory pressure sensor. Then, the intake saturation temperature corresponding to the intake pressure is determined according to a preset mapping table. Finally, the difference between the intake temperature and the intake saturation temperature is taken as the actual intake superheat. The preset mapping table contains one intake saturation temperature corresponding to each intake pressure.

[0087] Step 203: Determine the adjustment variable of the electronic expansion valve based on the target intake superheat and the actual intake superheat.

[0088] The air conditioner determines the target intake superheat. and actual inhalation superheat in multiple cycles The difference is used to determine the regulating variable of the electronic expansion valve.

[0089] Step 204: Control the electronic expansion valve to adjust its opening according to the adjustment variable.

[0090] The air conditioning control electronic expansion valve adjusts its opening degree according to the regulating variable.

[0091] In this application, the target suction superheat is determined by the actual outer ring temperature and inner ring temperature, and the actual suction superheat is determined by the actual suction temperature and suction pressure. Finally, the opening of the electronic expansion valve is adjusted according to the target suction superheat and the actual suction superheat. Compared with the prior art, this application avoids fixing the superheat solely by the suction temperature, but continuously adjusts the superheat based on the actual inner and outer ring temperatures, suction temperature, and suction pressure. This makes the opening of the electronic expansion valve adjustable, adapting to a wider operating temperature range of the unit and preventing unit malfunctions.

[0092] As an optional implementation, determining the target opening degree of the electronic expansion valve based on the detected outer ring temperature and inner ring temperature includes: acquiring the outer ring temperature, inner ring temperature, initial opening degree of the electronic expansion valve, outer ring temperature coefficient, and inner ring temperature coefficient of the air conditioner; determining a first product value of the outer ring temperature coefficient and the outer ring temperature, and determining a second product value of the inner ring temperature coefficient and the inner ring temperature; adding the first product value to the initial opening degree and subtracting the second product value to obtain the target opening degree of the electronic expansion valve.

[0093] The formula for the target opening is as follows:

[0094]

[0095] in, The target opening degree of the electronic expansion valve. This represents the initial opening degree of the electronic expansion valve. The outer ring temperature coefficient, The outer ring temperature, The inner ring temperature coefficient, This refers to the inner ring temperature.

[0096] formula In this process, depending on the type of electronic expansion generator used, the parameters... , , They are different, usually The value range is 30~50. and The value range is 0.1 to 1.

[0097] According to the above formula, the target opening of the unit's electronic expansion valve increases with the increase of the outer ring temperature and decreases with the increase of the inner ring temperature. When the outer ring temperature of the unit continues to rise, the condensing pressure of the unit increases accordingly. By increasing the initial opening of the electronic expansion valve, the pressure difference between the high and low pressure of the unit can be reduced. Therefore, under the same indoor operating conditions, increasing the target opening of the electronic expansion valve can improve the problem of excessively high pressure of the unit, thereby improving the problem of excessively high starting pressure of the unit under maximum load conditions.

[0098] When the outer ring temperature remains constant and the inner ring temperature decreases, the unit's suction pressure continuously decreases. Therefore, when the unit starts at a low inner ring temperature with the same initial electronic expansion valve step count, the suction pressure is often too low. However, the target opening degree (step count) of the electronic expansion valve in this application increases as the inner ring temperature decreases, which can improve the problem of low suction pressure during low load startup.

[0099] When the outer ring temperature increases and the inner ring temperature decreases, the unit often experiences excessively high exhaust temperature when starting under this operating condition. Therefore, by increasing the target opening degree (number of steps) of the electronic expansion valve, the refrigerant circulation volume of the unit can be increased and the suction superheat can be reduced, thereby reducing the exhaust temperature of the unit under high pressure differential.

[0100] Therefore, this application automatically calculates the target opening of the electronic expansion valve based on the outer ring temperature and the inner ring temperature, ensuring that the target opening of the electronic expansion valve of the unit is in the optimal state under different ambient temperatures, which can quickly stabilize the unit and improve the reliability of the unit during startup.

[0101] As an optional implementation, determining the target intake superheat based on the target opening degree, outer ring temperature, inner ring temperature, and initial intake superheat includes: obtaining the outer ring adjustment coefficient of the electronic expansion valve, the inner ring adjustment coefficient of the electronic expansion valve, and the initial intake superheat; determining the third product value of the outer ring adjustment coefficient and the outer ring temperature, and determining the fourth product value of the inner ring adjustment coefficient and the inner ring temperature; subtracting the third product value from the initial intake superheat and adding the fourth product value to obtain the target intake superheat.

[0102]

[0103] in, To achieve the target intake superheat, This refers to the initial intake superheat. This is the outer loop adjustment coefficient. The outer ring temperature, This is the inner loop adjustment coefficient. This refers to the inner ring temperature.

[0104] In the formula In China, usually The value range is 4 to 8. and The value range is 0.01~0.2. It can be seen that as the outer ring temperature increases, the target intake superheat decreases, and as the inner ring temperature increases, the target intake superheat increases. This invention improves the low energy efficiency of the unit under high ring temperature and improves the low intake pressure of the unit under low load conditions.

[0105] As an optional implementation, determining the adjustment variable of the electronic expansion valve based on the target intake superheat and the actual intake superheat includes: obtaining the first actual intake superheat in the current period n and the second actual intake superheat in period n-1; determining the first difference between the target intake superheat and the first actual intake superheat, and the second difference between the target intake superheat and the second actual intake superheat; if the target difference between the first difference and the second difference exceeds a preset range, then determining the third difference between the target intake superheat and the third actual intake superheat in period n-2; and determining the adjustment variable of the electronic expansion valve based on the preset coefficient of the electronic expansion valve, the first difference, the second difference, and the third difference.

[0106] The controller periodically obtains the inhalation temperature through the inhalation temperature sensor and the inhalation pressure through the inhalation pressure sensor. For example, it detects and obtains the inhalation temperature and inhalation pressure every ten seconds, meaning that the data acquisition is periodic.

[0107] The controller acquires the first actual inhalation superheat for the current cycle n, and then determines the target inhalation superheat. Compared with the first actual intake superheat First difference And determine the target intake superheat. With the second actual intake superheat The second difference Then determine the first difference. Second difference target difference between If the target difference Exceeding the preset range, for example, <-1 or If the value is greater than 1, then the target intake superheat is determined. The third actual intake superheat in period n-2 The third difference The adjustment variable of the electronic expansion valve is determined based on the preset coefficient, the first difference, the second difference, and the third difference of the electronic expansion valve.

[0108] The formula for the regulating variable of the electronic expansion valve is:

[0109] .

[0110] in, This is the regulating variable for the electronic expansion valve. The first difference, The second difference, The third difference, For the preset differential coefficients, For the preset integral coefficient, These are preset constant coefficients.

[0111] As an optional implementation, after determining a first difference between the target inhalation superheat and the first actual inhalation superheat, the method includes: if the target difference is within a preset range, then determining that the adjustment variable is zero.

[0112] If the target difference Within a preset range, for example, -1 < <1, the unit enters dead zone adjustment. u=0 indicates that the adjustment variable is zero.

[0113] As an optional implementation, after the electronic expansion valve is adjusted according to the regulating variable, the method further includes: after receiving a stop signal, the controller controls the electronic expansion valve to close and maintains the normal operation of components other than the electronic expansion valve.

[0114] This application also provides a method for adjusting the opening degree of an air conditioning electronic expansion valve, which specifically includes the following:

[0115] 1. Power on the refrigeration unit and perform a test. , , and .

[0116] 2. Calculate the target opening degree of the electronic expansion valve:

[0117] .

[0118] 3. The electronic expansion valve operates at the target opening for 3 minutes, and other components of the unit operate according to the original logic.

[0119] 4. Calculate the target intake superheat:

[0120] .

[0121] 5. According to and Calculate the first actual intake superheat for the current cycle n based on the corresponding steam temperature. and the first actual intake superheat of period n-1 .

[0122] 6. Calculation and First difference ,as well as and The second difference .

[0123] 7. Calculate - target difference .

[0124] 8.-1< <1, the unit enters dead zone adjustment. u=0 indicates that the adjustment variable is zero.

[0125] 9. <-1 or >1, the regulating variable is

[0126] .

[0127] Based on the same technical concept, this application proposes a device for adjusting the opening degree of an air conditioning electronic expansion valve, such as... Figure 3 As shown, the device includes:

[0128] The first determining module 301 is used to determine the target intake superheat based on the detected outer ring temperature and inner ring temperature of the air conditioner.

[0129] The second determining module 302 is used to determine the actual intake superheat based on the detected intake temperature and intake pressure of the air conditioner.

[0130] The third determining module 303 is used to determine the adjustment variable of the electronic expansion valve based on the target intake superheat and the actual intake superheat.

[0131] The control module 304 is used to control the electronic expansion valve to adjust its opening degree according to the adjustment variable.

[0132] Furthermore, the first determining module 301 includes:

[0133] The first determining unit is used to determine the target opening degree of the electronic expansion valve based on the detected outer ring temperature and inner ring temperature after the air conditioner is powered on.

[0134] The second determining unit is used to control the electronic expansion valve to operate at the target opening for a preset time, and then determine the target intake superheat based on the target opening, outer ring temperature, inner ring temperature, and initial intake superheat.

[0135] Optionally, the first determining unit is used for:

[0136] Obtain the outer ring temperature, inner ring temperature, initial opening of the electronic expansion valve, outer ring temperature coefficient, and inner ring temperature coefficient of the air conditioner;

[0137] Determine the first product of the outer ring temperature coefficient and the outer ring temperature, and determine the second product of the inner ring temperature coefficient and the inner ring temperature;

[0138] The target opening of the electronic expansion valve is obtained by adding the first product value to the initial opening and then subtracting the second product value.

[0139] Optionally, the second determining unit is used for:

[0140] Obtain the outer loop regulation coefficient, the inner loop regulation coefficient, and the initial intake superheat of the electronic expansion valve;

[0141] Determine the third product value of the outer loop adjustment coefficient and the outer loop temperature, and determine the fourth product value of the inner loop adjustment coefficient and the inner loop temperature;

[0142] The target inhalation superheat is obtained by subtracting the third product value from the initial inhalation superheat and adding the fourth product value.

[0143] Optionally, the second determining module 302 is used for:

[0144] The suction temperature at the compressor suction port is periodically obtained by a suction temperature sensor, and the suction pressure at the compressor suction port is periodically obtained by a suction pressure sensor.

[0145] Determine the inhalation saturation temperature corresponding to the inhalation pressure according to the preset mapping table;

[0146] The difference between the intake temperature and the intake saturation temperature is taken as the actual intake superheat.

[0147] Optionally, the third determining module 303 is used for:

[0148] Obtain the first actual inhalation superheat in the current period n and the second actual inhalation superheat in period n-1;

[0149] Determine a first difference between the target inhalation superheat and the first actual inhalation superheat, and a second difference between the target inhalation superheat and the second actual inhalation superheat;

[0150] If the target difference between the first difference and the second difference exceeds the preset range, then the third difference between the target inhalation superheat and the third actual inhalation superheat in cycle n-2;

[0151] The adjustment variable of the electronic expansion valve is determined based on the preset coefficient, the first difference, the second difference, and the third difference of the electronic expansion valve.

[0152] Optionally, the device is also used for:

[0153] If the target difference is within the preset range, then the adjustment variable is set to zero.

[0154] like Figure 4 As shown in the figure, this application provides an air conditioner, including a processor 401, a communication interface 402, a memory 403, and a communication bus 404, wherein the processor 401, the communication interface 402, and the memory 403 communicate with each other through the communication bus 404.

[0155] Memory 403 is used to store computer programs;

[0156] In one embodiment of this application, when the processor 401 executes the program stored in the memory 403, it implements the control method for adjusting the opening degree of the air conditioning electronic expansion valve provided in any of the foregoing method embodiments, including:

[0157] The target intake superheat is determined based on the detected outer and inner ring temperatures of the air conditioner.

[0158] The actual intake superheat is determined based on the detected intake temperature and intake pressure of the air conditioner.

[0159] The adjustment variable of the electronic expansion valve is determined based on the target intake superheat and the actual intake superheat.

[0160] The electronic expansion valve is controlled to adjust its opening degree according to the adjustment variable.

[0161] Furthermore, determining the target intake superheat based on the detected outer and inner ring temperatures of the air conditioner includes:

[0162] After the air conditioner is powered on, the target opening degree of the electronic expansion valve is determined based on the detected outer and inner ring temperatures.

[0163] After the electronic expansion valve is controlled to operate at the target opening for a preset time, the target intake superheat is determined based on the target opening, outer ring temperature, inner ring temperature, and initial intake superheat.

[0164] Optionally, determining the target opening degree of the electronic expansion valve based on the detected outer and inner ring temperatures includes:

[0165] Obtain the outer ring temperature, inner ring temperature, initial opening of the electronic expansion valve, outer ring temperature coefficient, and inner ring temperature coefficient of the air conditioner;

[0166] Determine the first product of the outer ring temperature coefficient and the outer ring temperature, and determine the second product of the inner ring temperature coefficient and the inner ring temperature;

[0167] The target opening of the electronic expansion valve is obtained by adding the first product value to the initial opening and then subtracting the second product value.

[0168] Optionally, the target intake superheat can be determined based on the target air opening, outer ring temperature, inner ring temperature, and initial intake superheat, including:

[0169] Obtain the outer loop regulation coefficient, the inner loop regulation coefficient, and the initial intake superheat of the electronic expansion valve;

[0170] Determine the third product value of the outer loop adjustment coefficient and the outer loop temperature, and determine the fourth product value of the inner loop adjustment coefficient and the inner loop temperature;

[0171] The target inhalation superheat is obtained by subtracting the third product value from the initial inhalation superheat and adding the fourth product value.

[0172] Optionally, the actual intake superheat can be determined based on the detected intake temperature and pressure of the air conditioner, including:

[0173] The suction temperature at the compressor suction port is periodically obtained by a suction temperature sensor, and the suction pressure at the compressor suction port is periodically obtained by a suction pressure sensor.

[0174] Determine the inhalation saturation temperature corresponding to the inhalation pressure according to the preset mapping table;

[0175] The difference between the intake temperature and the intake saturation temperature is taken as the actual intake superheat.

[0176] Optionally, the adjustment variables of the electronic expansion valve, determined based on the target intake superheat and the actual intake superheat, include:

[0177] Obtain the first actual inhalation superheat in the current period n and the second actual inhalation superheat in period n-1;

[0178] Determine a first difference between the target inhalation superheat and the first actual inhalation superheat, and a second difference between the target inhalation superheat and the second actual inhalation superheat;

[0179] If the target difference between the first difference and the second difference exceeds the preset range, then the third difference between the target inhalation superheat and the third actual inhalation superheat in cycle n-2;

[0180] The adjustment variable of the electronic expansion valve is determined based on the preset coefficient, the first difference, the second difference, and the third difference of the electronic expansion valve.

[0181] Optionally, after determining a first difference between the target inhalation superheat and the first actual inhalation superheat, the method includes:

[0182] If the target difference is within the preset range, then the adjustment variable is set to zero.

[0183] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the air conditioning electronic expansion valve opening adjustment method provided in any of the foregoing method embodiments.

[0184] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0185] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general-purpose hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0186] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also indicate the inclusion of the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0187] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method of regulating the opening degree of an electronic expansion valve of an air conditioner, characterized by, The method comprises: determining a target suction superheat degree according to detected outer ring temperature and inner ring temperature of the air conditioner; determining an actual suction superheat degree according to detected suction temperature and suction pressure of the air conditioner; determining an adjustment variable of the electronic expansion valve according to the target suction superheat degree and the actual suction superheat degree; controlling the electronic expansion valve to perform opening degree adjustment according to the adjustment variable; wherein the determining of the target suction superheat degree according to the detected outer ring temperature and inner ring temperature of the air conditioner comprises: determining a target opening degree of the electronic expansion valve according to detected outer ring temperature and inner ring temperature after the air conditioner is powered on; determining a target suction superheat degree according to the target opening degree, the outer ring temperature, the inner ring temperature and an initial suction superheat degree after the electronic expansion valve is controlled to operate at the target opening degree for a preset time length; wherein the determining of the target opening degree of the electronic expansion valve according to the detected outer ring temperature and inner ring temperature comprises: obtaining outer ring temperature, inner ring temperature, initial opening degree of the electronic expansion valve, outer ring temperature coefficient and inner ring temperature coefficient of the air conditioner; determining a first product value of the outer ring temperature coefficient and the outer ring temperature, and determining a second product value of the inner ring temperature coefficient and the inner ring temperature; adding the first product value to the initial opening degree, and then subtracting the second product value to obtain the target opening degree of the electronic expansion valve.

2. The method of claim 1, wherein, The determining of the target suction superheat degree according to the target opening degree, the outer ring temperature, the inner ring temperature and the initial suction superheat degree comprises: obtaining outer ring adjustment coefficient of the electronic expansion valve, inner ring adjustment coefficient of the electronic expansion valve and initial suction superheat degree; determining a third product value of the outer ring adjustment coefficient and the outer ring temperature, and determining a fourth product value of the inner ring adjustment coefficient and the inner ring temperature; subtracting the third product value from the initial suction superheat degree, and then adding the fourth product value to obtain the target suction superheat degree.

3. The method of claim 1, wherein, The determining of the actual suction superheat degree according to the detected suction temperature and suction pressure of the air conditioner comprises: periodically obtaining suction temperature of a suction port of a compressor through a suction temperature sensor, and periodically obtaining suction pressure of the suction port of the compressor through a suction pressure sensor; determining suction saturation temperature corresponding to the suction pressure according to a preset mapping table; taking a difference value between the suction temperature and the suction saturation temperature as the actual suction superheat degree.

4. The method of claim 1, wherein, The determining of the adjustment variable of the electronic expansion valve according to the target suction superheat degree and the actual suction superheat degree comprises: obtaining a first actual suction superheat degree of a current cycle n and a second actual suction superheat degree in a cycle n-1; determining a first difference value of the target suction superheat degree and the first actual suction superheat degree, and a second difference value of the target suction superheat degree and the second actual suction superheat degree; if a target difference value of the first difference value and the second difference value exceeds a preset range, determining a third difference value of the target suction superheat degree and a third actual suction superheat degree in a cycle n-2; determining the adjustment variable of the electronic expansion valve according to a preset coefficient of the electronic expansion valve, the first difference value, the second difference value and the third difference value.

5. The method of claim 4, wherein, After determining the first difference between the target suction superheat and the first actual suction superheat, the method comprises: If the target difference is within the preset range, determining the adjustment variable as zero.

6. An air conditioning electronic expansion valve opening degree adjusting device characterized by comprising: The device for implementing the electronic expansion valve opening degree adjustment method of the air conditioner according to claim 1 comprises: A first determining module for determining a target suction superheat according to detected outer ring temperature and inner ring temperature of the air conditioner; A second determining module for determining an actual suction superheat according to detected suction temperature and suction pressure of the air conditioner; A third determining module for determining an adjustment variable of the electronic expansion valve according to the target suction superheat and the actual suction superheat; A control module for controlling the electronic expansion valve to adjust the opening degree according to the adjustment variable.

7. An air conditioner characterized by comprising: The device comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus; The memory is used for storing a computer program; The processor is used for executing the program stored on the memory to implement the method according to any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the method according to any one of claims 1-5.

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