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

Abstract

The present application relates to a method and device for controlling the opening degree of an electronic expansion valve, a computer device, a storage medium, and a computer program product. The method includes: after the electronic expansion valve of the air conditioner operates at a preset valve opening degree for a first preset duration, controlling the electronic expansion valve to operate at a first adjusted opening degree for a second preset duration, where the first adjusted opening degree is greater than 1 / 2 of the target opening degree and less than the target opening degree; obtaining the real-time exhaust temperature of the air conditioner and comparing the real-time exhaust temperature of the air conditioner with a preset temperature range; when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining a first adjusted opening degree correction value according to the comparison result, where the first adjusted opening degree correction value is less than or equal to 1 / 2 of the target opening degree; and adjusting the valve opening degree of the electronic expansion valve based on the first adjusted opening degree and the first adjusted opening degree correction value. By using this method, the problem of overshoot of the exhaust temperature can be avoided, the operating ability of the entire air-conditioning system is improved, and the energy efficiency power consumption of the air conditioner is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioner control, and particularly to a method and device for controlling the opening degree of an electronic expansion valve, a computer device, a storage medium, and a computer program product. Background Art

[0002] During the operation of existing air conditioning systems in cooling and heating modes, there may be situations of frequency fluctuations and exhaust fluctuations caused by changes in the external environment or internal environment. Under normal circumstances, frequency fluctuations will cause corresponding exhaust fluctuations.

[0003] To solve the problem of exhaust fluctuations, a common method is to set an initial opening degree for the expansion valve of the air conditioning system based on the external ambient temperature and the operating frequency, and then compare the target exhaust temperature with the exhaust temperature during the operation at the initial opening degree, and control the expansion valve to change the opening degree so that the exhaust temperature of the air conditioner approaches the target exhaust temperature.

[0004] However, when the traditional method for solving exhaust fluctuations adjusts the valve opening degree of the electronic expansion valve, it is prone to overshoot of the exhaust, resulting in the problem that the exhaust temperature fluctuates near the target exhaust temperature, reducing the operating ability of the entire air conditioning system and having a problem of high energy efficiency power consumption. Summary of the Invention

[0005] Based on this, in view of the above technical problems, it is necessary to provide an electronic expansion valve opening degree control method, device, computer device, computer-readable storage medium, and computer program product that can improve the operating ability of the entire air conditioning system and reduce energy efficiency power consumption.

[0006] In a first aspect, the present application provides an electronic expansion valve opening degree control method. The method includes:

[0007] After the electronic expansion valve of the air conditioner operates at a preset valve opening degree for a first preset duration, control the electronic expansion valve to operate at a first adjustment opening degree for a second preset duration, where the first adjustment opening degree is greater than 1 / 2 of the target opening degree and less than the target opening degree;

[0008] Obtain the real-time exhaust temperature of the air conditioner, and compare the real-time exhaust temperature of the air conditioner with the preset temperature range;

[0009] When the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determine a first adjustment opening degree correction value according to the comparison result, where the first adjustment opening degree correction value is less than or equal to 1 / 2 of the target opening degree;

[0010] Based on the first adjustment opening degree and the first adjustment opening degree correction value, adjust the valve opening degree of the electronic expansion valve.

[0011] Second aspect, the present application also provides an electronic expansion valve opening control device. The device includes:

[0012] An initial adjustment module, configured to control the electronic expansion valve to operate at a first adjustment opening for a second preset duration after the electronic expansion valve of the air conditioner operates at a preset valve opening for a first preset duration, where the first adjustment opening is greater than 1 / 2 of the target opening and less than the target opening;

[0013] A comparison module, configured to obtain the real-time exhaust temperature of the air conditioner and compare the real-time exhaust temperature of the air conditioner with the preset temperature range;

[0014] A correction value determination module, configured to determine a first adjustment opening correction value according to the comparison result when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, where the first adjustment opening correction value is less than or equal to 1 / 2 of the target opening;

[0015] An adjustment module, configured to adjust the valve opening of the electronic expansion valve based on the first adjustment opening and the first adjustment opening correction value.

[0016] Third aspect, the present application also provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of the above-mentioned electronic expansion valve opening control method are implemented.

[0017] Fifth aspect, the present application also provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned electronic expansion valve opening control method are implemented.

[0018] For the above-mentioned electronic expansion valve opening control method, device, computer device, storage medium and computer program product, after the electronic expansion valve of the air conditioner operates at a preset valve opening for a first preset duration, first control the electronic expansion valve to operate at a first adjustment opening. Since 1 / 2 of the target opening < the first adjustment opening < the target opening, controlling the electronic expansion valve to operate at the first adjustment opening can quickly locate the valve opening near the target opening, so as to achieve the purpose of reducing the adjustment time of the electronic expansion valve when the difference between the exhaust temperature and the target exhaust temperature is large, and greatly saving the time to find the optimal valve opening. After the electronic expansion valve operates at the first adjustment opening for a second preset duration, then obtain the real-time exhaust temperature of the air conditioner, and correct the valve opening of the electronic expansion valve according to the comparison result between the real-time exhaust temperature and the preset temperature range, which can give a certain reaction time to the adjusted air conditioner, and obtain the real-time exhaust temperature when the exhaust of the air conditioner tends to be stable, which can effectively avoid the problem of overshoot of the exhaust temperature caused by the temperature difference between the valve opening and the exhaust temperature adjustment, improve the operation ability of the whole air-conditioning system, and reduce the energy consumption of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is an application environment diagram of an electronic expansion valve opening control method in an embodiment;

[0020] Figure 2 FIG. 2 is a schematic flowchart of an electronic expansion valve opening control method in an embodiment;

[0021] Figure 3 FIG. 3 is a schematic flowchart of a step of adjusting the valve opening of an electronic expansion valve based on a first adjustment opening and a first adjustment opening correction value in an embodiment;

[0022] Figure 4 FIG. 4 is a schematic flowchart of a step of adjusting the opening of an electronic expansion valve based on a second adjustment opening and a second adjustment opening correction value in an embodiment;

[0023] Figure 5 FIG. 5 is a schematic flowchart of a step of adjusting the opening of an electronic expansion valve based on a third adjustment opening and a third adjustment opening correction value in an embodiment;

[0024] Figure 6 FIG. 6 is a schematic flowchart of an electronic expansion valve opening control method in another embodiment;

[0025] Figure 7 FIG. 7 is a schematic diagram of the time distribution of an electronic expansion valve opening control method in an embodiment;

[0026] Figure 8 FIG. 8 is a structural block diagram of an electronic expansion valve opening control device in an embodiment;

[0027] Figure 9 FIG. 9 is an internal structure diagram of a computer device in an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] The electronic expansion valve opening control method provided by the embodiments of the present application can be applied to, for example Figure 1In the air conditioner 100 shown. Among them, the controller 102 communicates with the electronic expansion valve 104 and the temperature acquisition device 106 through the network. The data storage system can store the data that the controller 102 needs to process. The data storage system can be integrated on the controller 102, or placed in the cloud or other network servers. When the electronic expansion valve 104 of the air conditioner 100 operates at a preset valve opening for a first preset duration, the controller 102 controls the electronic expansion valve 104 to operate at a first adjusted opening for a second preset duration. The first adjusted opening is greater than 1 / 2 of the target opening and less than the target opening. The controller 102 obtains the real-time exhaust temperature of the air conditioner from the temperature acquisition device 106, compares the real-time exhaust temperature of the air conditioner 100 with the preset temperature range. When the real-time exhaust temperature of the air conditioner 100 is not within the preset temperature range, the first adjusted opening correction value is determined according to the comparison result. The first adjusted opening correction value is less than or equal to 1 / 2 of the target opening. The valve opening of the electronic expansion valve 104 is adjusted based on the first adjusted opening and the first adjusted opening correction value. Among them, the controller 102 can be any control chip or control device with logical processing and operation capabilities, and the temperature acquisition device 106 can be any device that can acquire temperature, such as a temperature bulb, a temperature sensor, etc. It can be understood that the number and actual installation position of the temperature acquisition device 106 in the air conditioner 100 are not limited in this application.

[0030] In one embodiment, as Figure 2 shown, a method for controlling the opening of an electronic expansion valve is provided. Taking the method applied to the Figure 1 controller in it as an example for description, the method includes the following steps:

[0031] Step 202, when the electronic expansion valve of the air conditioner operates at a preset valve opening for a first preset duration, control the electronic expansion valve to operate at a first adjusted opening for a second preset duration. The first adjusted opening is greater than 1 / 2 of the target opening and less than the target opening.

[0032] Among them, the electronic expansion valve is a throttling element that can control the refrigerant flow rate entering the refrigeration / heating device according to a preset program. It can use the electrical signal generated by the regulated parameter to control the voltage or current applied to the expansion valve, thereby achieving the purpose of regulating the liquid supply amount. In the air conditioner, the exhaust temperature of the air conditioner can be indirectly controlled by controlling the valve opening of the electronic expansion valve. It can be understood that generally in the air conditioner, the valve opening of the electronic expansion valve is inversely proportional to the exhaust temperature of the air conditioner. The smaller the valve opening of the electronic expansion valve, the higher the exhaust temperature of the air conditioner.

[0033] The preset valve opening is the valve opening used to quickly establish the pressure of the entire air conditioner during the initial startup stage, which can quickly establish high and low pressures for the air conditioner. The specific value of the preset valve opening is determined by the designer according to experimental data or empirical values. It can be understood that the preset valve opening values corresponding to different air conditioning systems can be different.

[0034] In one embodiment, the preset valve opening can be 280B.

[0035] Among them, the first preset duration is the operating duration required to establish the pressure of the entire machine, and the first preset duration is also determined by the designer according to experimental data or empirical values.

[0036] The first adjustment opening is the adjustment opening of the electronic expansion valve of the air conditioner during the initial adjustment. It is set that the first adjustment opening is greater than 1 / 2 of the target opening and less than the target opening. When the controller controls the electronic expansion valve of the air conditioner to operate at the first adjustment opening, the valve opening of the electronic expansion valve can be quickly positioned near the target opening. When the difference between the exhaust temperature and the target exhaust temperature is large, the time to find the optimal valve opening is greatly saved. It can be understood that the specific value of the first adjustment opening can be determined according to the actual equipment parameters of the air conditioner and the actual environment where the air conditioner is located.

[0037] In one embodiment, the first adjustment opening can be 3 / 4 of the target opening.

[0038] Among them, the second preset duration is the buffer duration required to buffer the pressure and exhaust adjustment of the air conditioner after the initial adjustment of the electronic expansion valve during the initial startup stage. After the initial adjustment of the electronic expansion valve, controlling the air conditioner to continuously operate at the first adjustment opening for the second preset duration can keep the valve opening unchanged, giving a buffer time for the pressure and exhaust adjustment, so that the air conditioner reaches a preliminary stable operation state. It can be understood that the second preset duration is obtained by the designer according to the opening adjustment operation duration. For example, if the opening adjustment operation duration is 600s, the first preset duration can be set to 60s, and the second preset duration can be set to 120s, so as to achieve the purpose of reasonably arranging the adjustment times within the opening adjustment operation duration. Since the second preset duration is still in the initial startup stage, the air conditioner frequency and exhaust are both changing at this time. After the initial 60s, it may only be that the frequency reaches the target frequency corresponding to the air conditioner, while the exhaust temperature, pressure, etc. are still in the transition from unstable to stable. Therefore, controlling the air conditioner to maintain the first adjustment opening operation for 120s can ensure that the valve opening remains unchanged and give a buffer time for the pressure and exhaust adjustment.

[0039] Among them, the target opening can be considered as the theoretical value of the opening of the electronic expansion valve that makes the exhaust temperature of the air conditioner equal to the target exhaust temperature, and the target opening is calculated by the controller according to the built-in program. It can be understood that although the exhaust temperature of the air conditioner can be equal to the target exhaust temperature when the controller calculates the opening of the electronic expansion valve as the target opening, however, when the air conditioner is actually operating, due to changes in the external environment or the internal environment, there will be a difference between the actually required target opening value and the theoretical target opening value. In order to improve the operating stability of the air conditioner, it is necessary to correct the target opening according to the actual operating state of the air conditioner.

[0040] In one embodiment, the controller determines the target frequency of the air conditioner according to the indoor environmental temperature, the outdoor environmental temperature where the air conditioner is located, and the set temperature of the user; the target opening of the electronic expansion valve is calculated based on the target frequency of the air conditioner.

[0041] Specifically, when the electronic expansion valve of the air conditioner operates at a preset valve opening for a first preset duration, the overall pressure of the air conditioner in the initial startup stage has been quickly established. At this time, the controller determines the first adjustment opening of the electronic expansion valve according to the target opening, and controls the electronic expansion valve to operate at the first adjustment opening for a second preset duration, ensuring a certain buffering time for the electronic expansion valve when operating at the first adjustment opening, so that the air conditioner operation reaches a preliminary stable state.

[0042] Step 204, obtain the real-time exhaust temperature of the air conditioner, and compare the real-time exhaust temperature of the air conditioner with a preset temperature range.

[0043] Among them, the real-time exhaust temperature of the air conditioner is detected in real time by a temperature acquisition device arranged on the exhaust pipeline. When the controller sends a temperature acquisition instruction to the temperature acquisition device, the temperature acquisition device will immediately respond to the temperature acquisition instruction and acquire the real-time exhaust temperature of the air conditioner.

[0044] The preset temperature range is the temperature range used to determine the subsequent correction value of the electronic expansion valve. It can be understood that since it is impossible to completely achieve precise control without fluctuations in the exhaust temperature during the actual control process, in order to ensure the feasibility of the adjustment, the designer sets a corresponding error value for the target exhaust temperature. According to the error value and the target exhaust temperature of the air conditioner, the preset temperature range can be obtained. Controlling the exhaust temperature of the air conditioner within a reasonable preset temperature range can be considered that the exhaust of the air conditioner reaches stability. Taking the error value as ±2 as an example, according to the error value and the target exhaust temperature T 目标 the preset temperature range can be determined as [T 目标 - 2, T 目标 + 2].

[0045] In one embodiment, the controller determines the target exhaust temperature of the air conditioner according to the indoor environmental temperature, the outdoor environmental temperature where the air conditioner is located, and the set temperature of the user.

[0046] Specifically, after the operation of the air conditioner tends to be initially stable again, the controller obtains the real-time exhaust temperature of the air conditioner from the temperature acquisition device, calculates the preset temperature range of the air conditioner, and compares the real-time exhaust temperature of the air conditioner with the preset temperature range.

[0047] Step 206, when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determine a first adjustment opening correction value according to the comparison result, and the first adjustment opening correction value is less than or equal to 1 / 2 of the target opening.

[0048] Specifically, the controller compares the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is not within the preset temperature range, it means that after this valve opening adjustment, the exhaust of the air conditioner has not reached stability and needs to be adjusted continuously. The controller determines the first adjustment opening correction value of the electronic expansion valve according to the comparison result. Since the valve opening of the electronic expansion valve is already relatively close to the target opening at this time, when the valve opening of the electronic expansion valve is corrected and adjusted this time, the first adjustment opening correction value should not be too large, otherwise it is easy to cause system fluctuations. It can be understood that the first adjustment opening correction value cannot be too small either, otherwise it will cause too long adjustment time. Therefore, the first adjustment opening correction value is set to be less than or equal to 1 / 2 of the target opening.

[0049] Step 208, based on the first adjustment opening and the first adjustment opening correction value, adjust the valve opening of the electronic expansion valve.

[0050] Specifically, after obtaining the first adjustment opening correction value, the controller adjusts the valve opening of the electronic expansion valve based on the first adjustment opening and the first adjustment opening correction value.

[0051] In the above electronic expansion valve opening control method, after the electronic expansion valve of the air conditioner operates at a preset valve opening for a first preset duration, first control the electronic expansion valve to operate at a first adjusted opening. Since 1 / 2 target opening < first adjusted opening < target opening, controlling the electronic expansion valve to operate at the first adjusted opening can quickly position the valve opening near the target opening, so as to achieve the purpose of reducing the adjustment time of the electronic expansion valve when the difference between the exhaust temperature and the target exhaust temperature is large, and greatly save the time to find the optimal valve opening. After the electronic expansion valve operates at the first adjusted opening for a second preset duration, then obtain the real-time exhaust temperature of the air conditioner, and correct the valve opening of the electronic expansion valve according to the comparison result between the real-time exhaust temperature and the preset temperature range, which can give the adjusted air conditioner a certain response time, obtain the real-time exhaust temperature when the exhaust of the air conditioner tends to be stable, and can effectively avoid the problem of overshoot of the exhaust temperature caused by the temperature difference between the valve opening and the exhaust temperature adjustment, improve the operating capacity of the whole air-conditioning system, and reduce the energy consumption of the air conditioner.

[0052] In one embodiment, the controller compares the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the first adjusted opening and continue to operate.

[0053] Specifically, if after the electronic expansion valve operates at the first adjusted opening for a second preset duration, the real-time exhaust temperature of the air conditioner is within the preset temperature range, it indicates that the exhaust of the air conditioner has stabilized, and the current valve opening of the electronic expansion valve is the optimal valve opening, and the current valve opening can be maintained and continue to operate.

[0054] Furthermore, in one embodiment, when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determine the first adjusted opening correction value according to the comparison result, including: if the real-time exhaust temperature of the air conditioner is less than the lower limit value of the preset temperature range, determine the first adjusted opening correction value as reducing 1 / 4 target opening.

[0055] Among them, since there are two situations where the real-time exhaust temperature is not within the preset temperature range, therefore, the first adjusted opening correction value not only has a specific value, but also corresponds to an adjustment direction, and the adjustment direction is to reduce or increase the valve opening.

[0056] Specifically, the controller compares the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is less than the lower limit value of the preset temperature range, it indicates that the real-time exhaust temperature of the air conditioner is too low at this time, and it is necessary to reduce the valve opening of the electronic expansion valve to achieve the effect of increasing the exhaust temperature of the air conditioner. The controller determines the first adjusted opening correction value as reducing 1 / 4 target opening.

[0057] It can be understood that the first adjustment opening correction value is the correction value used for the first valve adjustment correction. When it is necessary to reduce the valve opening of the electronic expansion valve, the specific value of the first adjustment opening correction value is set to 1 / 4 of the target opening, which can avoid the fluctuation of the air conditioner system while achieving the purpose of rapid adjustment.

[0058] As mentioned above, there are two cases where the real-time exhaust temperature is not within the preset temperature range. Therefore, in one embodiment, when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, the first adjustment opening correction value is determined according to the comparison result, including: if the real-time exhaust temperature of the air conditioner is greater than the upper limit value of the preset temperature range, it is determined that the first adjustment opening correction value is increased by 1 / 2 of the target opening.

[0059] Specifically, the controller compares the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is greater than the lower limit value of the preset temperature range, it means that the real-time exhaust temperature of the air conditioner is too high at this time, and it is necessary to increase the valve opening of the electronic expansion valve to achieve the effect of reducing the exhaust temperature of the air conditioner. The controller determines that the first adjustment opening correction value is increased by 1 / 2 of the target opening.

[0060] It can be understood that the first adjustment opening correction value is the correction value used for the first valve adjustment correction. When it is necessary to increase the valve opening of the electronic expansion valve, the specific value of the first adjustment opening correction value is set to 1 / 2 of the target opening, which can avoid the fluctuation of the air conditioner system while achieving the purpose of rapid adjustment.

[0061] Correcting the electronic expansion valve is an effective method to quickly find the optimal valve opening. In one embodiment, as Figure 3 shown, based on the first adjustment opening and the first adjustment opening correction value, the valve opening of the electronic expansion valve is adjusted, including:

[0062] Step 302, obtaining a second adjustment opening based on the first adjustment opening and the first adjustment opening correction value.

[0063] Specifically, after the controller obtains the first adjustment opening correction value, the first adjustment opening correction value is used to correct the first adjustment opening to obtain a second adjustment opening.

[0064] It can be understood that since there are actually two cases for the first adjustment opening correction value, therefore, when the controller uses the first adjustment opening correction value to correct the first adjustment opening, there are also two corresponding cases for obtaining the second adjustment opening.

[0065] For example, if the first adjusted opening correction value is to decrease the target opening by 1 / 4, the first adjusted opening is corrected using the first adjusted opening correction value to obtain the second adjusted opening, that is, the target opening is decreased by 1 / 4 based on the first adjusted opening. At this time, the second adjusted opening = the first adjusted opening - 1 / 4 of the target opening.

[0066] If the first adjusted opening correction value is to increase the target opening by 1 / 2, the first adjusted opening is corrected using the first adjusted opening correction value to obtain the second adjusted opening, that is, the target opening is increased by 1 / 2 based on the first adjusted opening. At this time, the second adjusted opening = the first adjusted opening + 1 / 2 of the target opening.

[0067] Step 304, after controlling the electronic expansion valve to operate at the second adjusted opening for a third preset duration, update the current exhaust temperature of the air conditioner to the real-time exhaust temperature of the air conditioner.

[0068] Among them, the third preset duration is the operating duration required to determine that the operation of the air conditioner tends to be stable again after the electronic expansion valve is adjusted. By setting the third preset duration, sufficient reaction adjustment time can be given to the system of the air conditioner, so that the exhaust of the air conditioner changes after the opening of the regulating valve, and the next step can be taken in time after judging the exhaust change trend, enabling the controller to adjust the opening of the electronic expansion valve more quickly and reach the opening corresponding to the target exhaust as soon as possible. It can be understood that after the controller controls the electronic expansion valve to operate at the second adjusted opening for the third preset duration, it can be considered that the operation of the air conditioner has re-tended to be stable at this time.

[0069] In one embodiment, the third preset duration is obtained by the designer according to the operating duration. The time length of the third preset duration is equal to the sum of the time lengths of the first preset duration and the second preset duration, that is, t3 = t1 + t2. For example, if the opening adjustment operation duration is 600 s, the first preset duration can be set to 60 s, the second preset duration can be set to 120 s, and the third preset duration can be 180 s, so as to achieve the purpose of reasonably arranging the adjustment times within the opening adjustment operation duration.

[0070] Specifically, after the controller controls the electronic expansion valve to operate at the second adjusted opening for the third preset duration, it is ensured that after the valve opening of the electronic expansion valve is adjusted to the second adjusted opening, the overall operation of the air conditioner has tended to be stable. At this time, the controller obtains the current exhaust temperature of the air conditioner through the temperature acquisition device and updates the current exhaust temperature to the real-time exhaust temperature of the air conditioner.

[0071] Step 306, compare the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the second adjusted opening and continue to operate.

[0072] Specifically, the controller continues to compare the updated real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, it indicates that the current exhaust of the air conditioner has stabilized. The current valve opening of the electronic expansion valve is the optimal valve opening, and the current valve opening can be maintained for continuous operation. The controller can then control the electronic expansion valve to maintain the second adjustment opening for continuous operation.

[0073] In this embodiment, after the initial correction of the electronic expansion valve, the controller continues to wait for the air conditioner to operate continuously for a second preset duration. During this period, no detection is performed, but rather the overall system of the air conditioner is ensured to operate stably. Then, the real-time exhaust temperature of the stabilized air conditioner is subjected to a second detection with the preset temperature range, thereby ensuring the accuracy of the obtained optimal valve opening, further avoiding the problem of overshoot of the exhaust temperature caused by the temperature difference between the valve opening and the exhaust temperature adjustment, improving the operating ability of the entire air conditioner system, and reducing the energy consumption of the air conditioner.

[0074] During the second detection, similarly, the electronic expansion valve may still not be adjusted to the optimal valve opening. Based on this, in one embodiment, the electronic expansion valve opening control method further includes: if the real-time exhaust temperature of the air conditioner is not within the preset temperature range, then determine a second adjustment opening correction value according to the comparison result, and the second adjustment opening correction value is less than or equal to 1 / 4 of the target opening; based on the second adjustment opening and the second adjustment opening correction value, adjust the opening of the electronic expansion valve.

[0075] Specifically, the controller compares the real-time exhaust temperature collected after the initial correction of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is not within the preset temperature range, it indicates that after this valve opening correction adjustment, the exhaust of the air conditioner still has not stabilized and further correction adjustment is required.

[0076] The controller determines the second adjustment opening correction value of the electronic expansion valve according to the comparison result. Since the valve opening of the electronic expansion valve has undergone an initial correction adjustment, when the valve opening of the electronic expansion valve is corrected and adjusted again, the second adjustment opening correction value needs to be more precise and the adjustment range is lower compared to the first adjustment opening correction value. Therefore, setting the second adjustment opening correction value to be less than or equal to 1 / 4 of the target opening can ensure that the correction value is not too small to cause too long an adjustment time, nor too large to cause system fluctuations.

[0077] Consistent with the initial valve correction adjustment process, there are also different situations for the second adjustment opening correction value. In one embodiment, if the real-time exhaust temperature of the air conditioner is not within the preset temperature range, then determining the second adjustment opening correction value according to the comparison result includes: if the real-time exhaust temperature of the air conditioner is less than the lower limit value of the preset temperature range, then determine that the first adjustment opening correction value is to decrease by 1 / 8 of the target opening.

[0078] Specifically, the controller compares the updated real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is lower than the lower limit value of the preset temperature range, it indicates that even though the valve opening of the air conditioner has been corrected and adjusted, the real-time exhaust temperature of the air conditioner is still too low. It is necessary to reduce the valve opening of the electronic expansion valve to achieve the effect of increasing the exhaust temperature of the air conditioner. The controller determines that the second adjustment opening correction value is to decrease by 1 / 8 of the target opening.

[0079] It can be understood that the second adjustment opening correction value is the correction value used for the second valve correction adjustment. When it is necessary to reduce the valve opening of the electronic expansion valve, setting the specific value of the second adjustment opening correction value to 1 / 8 of the target opening can avoid fluctuations in the air conditioner system while achieving the purpose of rapid adjustment.

[0080] Further, in an embodiment, when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining the second adjustment opening correction value according to the comparison result includes: if the real-time exhaust temperature of the air conditioner is higher than the upper limit value of the preset temperature range, it is determined that the second adjustment opening correction value is to increase by 1 / 4 of the target opening.

[0081] Specifically, the controller compares the updated real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is higher than the lower limit value of the preset temperature range, it indicates that even though the valve opening of the air conditioner has been corrected and adjusted, the real-time exhaust temperature of the air conditioner is still too high. It is necessary to increase the valve opening of the electronic expansion valve to achieve the effect of reducing the exhaust temperature of the air conditioner. The controller determines that the second adjustment opening correction value is to increase by 1 / 4 of the target opening.

[0082] It can be understood that the second adjustment opening correction value is the correction value used for the second valve correction adjustment. When it is necessary to increase the valve opening of the electronic expansion valve, setting the specific value of the second adjustment opening correction value to 1 / 4 of the target opening can avoid fluctuations in the air conditioner system while achieving the purpose of rapid adjustment.

[0083] After obtaining the second adjustment opening correction value, the controller needs to perform a second correction adjustment on the opening of the electronic expansion valve according to the second adjustment opening correction value.

[0084] In an embodiment, as Figure 4 shown, adjusting the opening of the electronic expansion valve based on the second adjustment opening and the second adjustment opening correction value includes:

[0085] Step 402, obtaining a third adjustment opening based on the second adjustment opening and the second adjustment opening correction value.

[0086] Specifically, after the controller obtains the second adjustment opening correction value, it uses the second adjustment opening correction value to correct the second adjustment opening to obtain the third adjustment opening.

[0087] It can be understood that since there are actually two cases for the second adjustment opening correction value, therefore, when the controller uses the second adjustment opening correction value to correct the second adjustment opening, there are also two corresponding cases for obtaining the third adjustment opening.

[0088] For example, if the second adjustment opening correction value is to decrease the target opening by 1 / 8, then use the second adjustment opening correction value to correct the second adjustment opening, and the obtained third adjustment opening is to decrease the target opening by 1 / 8 on the basis of the second adjustment opening. At this time, the third adjustment opening = the second adjustment opening - 1 / 8 of the target opening.

[0089] If the second adjustment opening correction value is to increase the target opening by 1 / 4, then use the second adjustment opening correction value to correct the second adjustment opening, and the obtained third adjustment opening is to increase the target opening by 1 / 4 on the basis of the second adjustment opening. At this time, the third adjustment opening = the second adjustment opening + 1 / 4 of the target opening.

[0090] Step 404, after controlling the electronic expansion valve to operate at the third adjustment opening for the third preset duration, update the exhaust temperature of the current air conditioner to the real-time exhaust temperature of the air conditioner.

[0091] Specifically, after the controller controls the electronic expansion valve to operate at the third adjustment opening for the third preset duration, it ensures that after the valve opening of the electronic expansion valve is adjusted to the third adjustment opening, the overall operation of the air conditioner has tended to be stable. At this time, the controller obtains the current exhaust temperature of the air conditioner through the temperature acquisition device and updates the current exhaust temperature to the real-time exhaust temperature of the air conditioner.

[0092] Step 406, compare the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the third adjustment opening and continue to operate.

[0093] Specifically, the controller continues to compare the updated real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, it means that the current exhaust of the air conditioner has been stabilized, and the current valve opening of the electronic expansion valve is the optimal valve opening and can maintain the current valve opening and continue to operate. The controller can then control the electronic expansion valve to maintain the third adjustment opening and continue to operate.

[0094] In this embodiment, after the controller performs two corrective adjustments on the electronic expansion valve, it continues to wait for the air conditioner to run continuously for a second preset duration. During this period, no detection is performed, but rather the overall system of the air conditioner is ensured to operate stably. Then, the real-time exhaust gas temperature of the stabilized air conditioner is detected for the third time with a preset temperature range, so as to ensure the accuracy of the obtained optimal valve opening degree, further avoid the problem of overshoot of the exhaust gas temperature caused by the temperature difference between the valve opening degree and the exhaust gas temperature adjustment, improve the operating capacity of the entire air conditioner system, and reduce the energy consumption of the air conditioner.

[0095] During the third detection, similarly, the electronic expansion valve may still not be adjusted to the optimal valve opening degree. Based on this, in one embodiment, the method for controlling the opening degree of the electronic expansion valve further includes: if the real-time exhaust gas temperature of the air conditioner is not within the preset temperature range, then determine a third adjustment opening degree correction value according to the comparison result, and the third adjustment opening degree correction value is less than or equal to 1 / 8 of the target opening degree; based on the third adjustment opening degree and the third adjustment opening degree correction value, adjust the opening degree of the electronic expansion valve.

[0096] Specifically, the controller compares the real-time exhaust gas temperature collected after the second corrective adjustment of the air conditioner with the preset temperature range. If the real-time exhaust gas temperature of the air conditioner is not within the preset temperature range, it indicates that after this valve opening degree corrective adjustment, the exhaust gas of the air conditioner has not yet reached stability and needs to be adjusted continuously.

[0097] The controller determines the third adjustment opening degree correction value of the electronic expansion valve according to the comparison result. Since the valve opening degree of the electronic expansion valve has undergone two corrective adjustments, when the valve opening degree of the electronic expansion valve is corrected again, the third adjustment opening degree correction value needs to be more precise and have a lower adjustment amplitude compared to the previous second adjustment opening degree correction value. Therefore, setting the third adjustment opening degree correction value to be less than or equal to 1 / 8 of the target opening degree can ensure that the correction value is not too small to cause too long an adjustment time, nor too large to cause system fluctuations.

[0098] Consistent with the first valve correction adjustment and the second valve correction adjustment processes, there are also different situations for the third adjustment opening degree correction value. In one embodiment, if the real-time exhaust gas temperature of the air conditioner is not within the preset temperature range, then determining the second adjustment opening degree correction value according to the comparison result includes: if the real-time exhaust gas temperature of the air conditioner is less than the lower limit value of the preset temperature range, then determine that the first adjustment opening degree correction value is to decrease by 1 / 16 of the target opening degree.

[0099] Specifically, the controller compares the updated real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is lower than the lower limit value of the preset temperature range, it indicates that even though the valve opening of the air conditioner has been corrected and adjusted multiple times, the real-time exhaust temperature of the air conditioner is still too low. It is necessary to reduce the valve opening of the electronic expansion valve to achieve the effect of increasing the exhaust temperature of the air conditioner. The controller determines that the second adjustment opening correction value is to decrease by 1 / 16 of the target opening.

[0100] It can be understood that the third adjustment opening correction value is the correction value used for the third valve correction adjustment. When it is necessary to reduce the valve opening of the electronic expansion valve, setting the specific value of the third adjustment opening correction value to 1 / 16 of the target opening can avoid fluctuations in the air conditioner system while achieving the purpose of rapid adjustment.

[0101] Further, in an embodiment, when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining the second adjustment opening correction value according to the comparison result includes: if the real-time exhaust temperature of the air conditioner is greater than the upper limit value of the preset temperature range, then determine that the second adjustment opening correction value is to increase by 1 / 8 of the target opening.

[0102] Specifically, the controller compares the updated real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is greater than the lower limit value of the preset temperature range, it indicates that even though the valve opening of the air conditioner has been corrected and adjusted multiple times, the real-time exhaust temperature of the air conditioner is still too high. It is necessary to increase the valve opening of the electronic expansion valve to achieve the effect of reducing the exhaust temperature of the air conditioner. The controller determines that the third adjustment opening correction value is to increase by 1 / 8 of the target opening.

[0103] It can be understood that the third adjustment opening correction value is the correction value used for the third valve correction adjustment. When it is necessary to increase the valve opening of the electronic expansion valve, setting the specific value of the third adjustment opening correction value to 1 / 8 of the target opening can avoid fluctuations in the air conditioner system while achieving the purpose of rapid adjustment.

[0104] After obtaining the third adjustment opening correction value, the controller needs to perform the third correction adjustment on the opening of the electronic expansion valve according to the third adjustment opening correction value.

[0105] In an embodiment, as Figure 5 shown, adjusting the opening of the electronic expansion valve based on the third adjustment opening and the third adjustment opening correction value includes:

[0106] Step 502, obtaining a fourth adjustment opening based on the third adjustment opening and the third adjustment opening correction value.

[0107] Specifically, after the controller obtains the third adjustment opening correction value, it uses the third adjustment opening correction value to correct the third adjustment opening to obtain the fourth adjustment opening.

[0108] It can be understood that since there are actually two cases for the third adjustment opening correction value, therefore, when the controller uses the third adjustment opening correction value to correct the third adjustment opening, there are also two corresponding cases for obtaining the fourth adjustment opening.

[0109] For example, if the third adjustment opening correction value is to decrease the target opening by 1 / 16, then use the third adjustment opening correction value to correct the third adjustment opening, and the obtained fourth adjustment opening is to decrease the target opening by 1 / 16 on the basis of the third adjustment opening. At this time, the fourth adjustment opening = the third adjustment opening - 1 / 16 of the target opening.

[0110] If the third adjustment opening correction value is to increase the target opening by 1 / 8, then use the third adjustment opening correction value to correct the third adjustment opening, and the obtained fourth adjustment opening is to increase the target opening by 1 / 8 on the basis of the third adjustment opening. At this time, the fourth adjustment opening = the third adjustment opening + 1 / 8 of the target opening.

[0111] Step 504, after controlling the electronic expansion valve to operate at the fourth adjustment opening for a first preset duration, update the current exhaust temperature of the air conditioner to the real-time exhaust temperature of the air conditioner.

[0112] Specifically, since the controller controlling the electronic expansion valve to operate at the fourth adjustment opening is already the result of three corrections to the valve opening of the electronic expansion valve, therefore, in order to avoid too long correction adjustment time, after the controller controls the electronic expansion valve to operate at the fourth adjustment opening for the first preset duration, it can obtain the current exhaust temperature of the air conditioner through the temperature acquisition device and update the current exhaust temperature to the real-time exhaust temperature of the air conditioner.

[0113] Step 506, compare the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the fourth adjustment opening and continue to operate.

[0114] Specifically, the controller continues to compare the updated real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, it means that the current exhaust of the air conditioner has stabilized, and the current valve opening of the electronic expansion valve is the optimal valve opening and can maintain the current valve opening and continue to operate. The controller can then control the electronic expansion valve to maintain the fourth adjustment opening and continue to operate.

[0115] In this embodiment, after the controller performs three correction adjustments on the electronic expansion valve, in order to avoid excessive use of the correction adjustment time, it only needs to continue waiting for the air conditioner to run continuously for the first preset duration, and then the real-time exhaust temperature of the stabilized air conditioner can be detected within the preset temperature range. This ensures the accuracy of the obtained optimal valve opening while also ensuring the timeliness of the correction adjustment, further avoiding the problem of overshoot of the exhaust temperature caused by the temperature difference between the valve opening and the exhaust temperature adjustment, improving the operating capacity of the entire air-conditioning system, and reducing the energy consumption of the air conditioner.

[0116] The purpose of the controller performing multiple correction adjustments on the electronic expansion valve is to quickly find the optimal opening of the electronic expansion valve. However, if the correction adjustment time is too long, it will also affect the user experience to a certain extent and increase the system operating power consumption.

[0117] Based on this, in one embodiment, the electronic expansion valve opening control method further includes: obtaining the adjustment operation duration of the air conditioner, and comparing the adjustment operation duration of the air conditioner with a preset duration threshold; if the adjustment operation duration of the air conditioner is equal to the preset duration threshold, then control the air conditioner to perform fuzzy control to adjust the opening of the electronic expansion valve.

[0118] Among them, the adjustment operation duration of the air conditioner is the total duration used by the air conditioner during valve opening adjustment and correction adjustment. It can be understood that the adjustment operation duration t of the air conditioner obtained after the third correction adjustment 总 has the following relationship with the first preset duration t1, the second preset duration t2, and the third preset duration t3: t 总 = 2t1 + t2 + 2t3.

[0119] In one of the embodiments, the third preset duration t3 can be equal to the first preset duration t1 + the second preset duration t2. Therefore, the adjustment operation duration t of the air conditioner after the third correction adjustment 总 = (t1 + 3t3).

[0120] Among them, the preset duration threshold is a preset threshold parameter used to determine whether to enter fuzzy control to reduce the correction adjustment duration. By comparing the adjustment operation duration of the air conditioner with the preset duration threshold, it can be ensured that the correction adjustment duration will not exceed the limit.

[0121] The fuzzy control is a control program built into the air conditioner. The basic principle of fuzzy control can be considered as follows: when the exhaust temperature exceeds the target exhaust temperature, the valve of the electronic expansion valve is increased; when it is lower than the target exhaust temperature, the valve of the electronic expansion valve is closed. The specific amplitude of increase and decrease and the judgment of the target exhaust temperature are all realized by the module control algorithm. It can be understood that if the fuzzy control is directly used to control the opening of the electronic expansion valve in the air conditioner, the time period required to achieve satisfactory adjustment accuracy is too long, which will greatly affect the user experience and increase the operating power consumption of the air conditioning system.

[0122] Specifically, after the controller completes three correction adjustments, it obtains the adjustment operation duration of the air conditioner. If the adjustment operation duration of the air conditioner is equal to the preset duration threshold, it means that the time for correction adjustment has reached the requirement. Although the optimal valve opening of the electronic expansion valve has not been determined, it can be considered that after three correction adjustments, the valve opening of the electronic expansion valve is very close to the optimal valve opening. To save energy, the controller will exit the correction adjustment control program and use the built-in fuzzy control to adjust the valve opening of the electronic expansion valve to the optimal valve opening. This process greatly reduces the duration used to find the optimal valve opening compared to directly using fuzzy control to find the optimal valve opening at the beginning, improves the operating ability of the entire air conditioning system, and reduces the energy efficiency power consumption of the air conditioner.

[0123] In one embodiment, as Figure 6 shown, a method for controlling the opening of an electronic expansion valve is provided. This method is mainly used in the start-up stage of the air conditioner to quickly adjust the valve opening to the valve opening required to reach the target exhaust temperature. Specifically, it includes the following steps:

[0124] After the air conditioner is turned on, the controller controls the valve opening of the electronic expansion valve to be adjusted to the preset valve opening P0 and maintained, so that the overall pressure of the whole machine is quickly established in the initial start-up stage. After running for t1 s, the controller controls the valve opening to be adjusted to 3 / 4 of the target opening, and this opening is denoted as the P1 opening. After the controller controls the electronic expansion valve to be adjusted to the P1 opening, it maintains the P1 opening and runs for t2 s. At this time, the air conditioner has run for t3 s in total.

[0125] When running for t3 s, detect the real-time exhaust temperature T of the air conditioner at this time 排气 , and at the same time determine the temperature range according to the target exhaust temperature T 目标 . The temperature range is [T 目标 - 2, T 目标 + 2].

[0126] Compare T 排气 with the temperature range. If T 排气 < T 目标 - 2, then control the opening of the electronic expansion valve to be adjusted to P1 - 1 / 4P 目标 , and this opening is denoted as the P2 opening. If T目标 -2 ≤ T 排气 ≤ T 目标 + 2, then maintain the opening degree of P1. If T 排气 >T 目标 + 2, then control the opening degree of the electronic expansion valve to be adjusted to P1 + 1 / 2P 目标 , and this opening degree is recorded as the opening degree of P3.

[0127] After the controller controls the electronic expansion valve to continue running for t3s with the adjusted opening degree, detect it again, and this is the second detection.

[0128] Specifically, the second detection is carried out when the running duration of the air conditioner is 2 × t3s. During the detection, if T 排气 <T 目标 - 2, then control the opening degree of the electronic expansion valve to be adjusted to P2 - 1 / 8P 目标 , and this opening degree is recorded as P 22 opening degree. If T 目标 - 2 ≤ T 排气 ≤ T 目标 + 2, then maintain the existing opening degree (P1 or P2 or P3). If T 排气 >T 目标 + 2, then control the opening degree of the electronic expansion valve to be adjusted to P3 + 1 / 4P 目标 , and this opening degree is recorded as P 33 opening degree.

[0129] The controller conducts the third detection when the running duration of the air conditioner is 3 × t3s. During the detection, if T 排气 <T 目标 - 2, then control the opening degree of the electronic expansion valve to be adjusted to P 22 - 1 / 16P 目标 , and this opening degree is recorded as P 222 opening degree. If T 目标 - 2 ≤ T 排气 ≤ T 目标 + 2, then maintain the existing opening degree (P1 or P2 or P3 or P 22 or P 33 ). If T 排气 >T 目标 + 2, then control the opening degree of the electronic expansion valve to be adjusted to P 33 + 1 / 8P 目标 , and this opening degree is recorded as P 333 opening degree.

[0130] After the controller controls the electronic expansion valve to continue running for t1 s with the adjusted opening degree, it is detected again. This is the third detection, that is, the last detection is carried out at the moment of a total operation of (t1 + 3t3) s since the compressor is started. This detection is only used as the verification for entering the closed-loop control, and the subsequent opening degree and exhaust adjustment rely on the PID fuzzy control set by the program.

[0131] After entering (t1 + 3t3) s, the closed-loop control is entered. At this time, the relationship between the target exhaust and the opening degree is controlled according to the requirements of the built-in PID fuzzy control in the program. The time distribution diagram of the whole method is as Figure 7 shown.

[0132] It can be understood that when adjusting the valve opening degree of the electronic expansion valve, since the opening degree of the expansion valve is controlled within an upper limit range, generally between 50 and 480, therefore, if the valve opening degree exceeds the set range value after opening or closing during the above control process, the upper and lower limits are taken, and then it is maintained between the upper and lower limits until the PID closed-loop control is entered.

[0133] In the method of this embodiment, program optimization control is adopted so that when the difference between the detected exhaust and the target exhaust is large, the valve opening degree and the adjustment time can be enlarged and reduced to meet the purpose of rapid exhaust adjustment. In this way, the time for the valve to adjust to find the optimal opening degree can be saved. At the same time, after the valve opening degree is fixed at a certain opening degree and runs for a certain time, the system exhaust tends to be stable, avoiding the problem of overshoot of the exhaust caused by both the exhaust and the opening degree acting simultaneously. Thus, the exhaust can be stabilized. Using the method of this embodiment, the exhaust and the target exhaust can find the stable points fastest in three time periods of 2*t3 s, 3*t3 s, and (t1 + 3*t3) s. If this time is exceeded, the subsequent closed-loop control is entered. At this time, the whole machine system tends to be stable, and the exhaust fluctuation and the valve opening degree fluctuation during adjustment will also be optimized.

[0134] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are shown in sequence according to the arrows, these steps do not necessarily have to be executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages do not necessarily have to be executed at the same moment, but can be executed at different moments. The execution order of these steps or stages does not necessarily have to be sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0135] Based on the same inventive concept, an embodiment of the present application further provides an electronic expansion valve opening control device for implementing the above-mentioned electronic expansion valve opening control method. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the electronic expansion valve opening control device provided below can refer to the limitations on the electronic expansion valve opening control method in the above text, and will not be repeated here.

[0136] In one embodiment, as Figure 8 shown, an electronic expansion valve opening control device 800 is provided, including: a primary adjustment module 801, a comparison module 802, a correction value determination module 803, and an adjustment module 804, where:

[0137] The primary adjustment module 801 is configured to control the electronic expansion valve to operate at a first adjustment opening for a second preset duration after the electronic expansion valve of the air conditioner operates at a preset valve opening for a first preset duration, where the first adjustment opening is greater than 1 / 2 of the target opening and less than the target opening.

[0138] The comparison module 802 is configured to obtain the real-time exhaust temperature of the air conditioner and compare the real-time exhaust temperature of the air conditioner with a preset temperature range.

[0139] The correction value determination module 803 is configured to determine a first adjustment opening correction value according to the comparison result when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, and the first adjustment opening correction value is less than or equal to 1 / 2 of the target opening.

[0140] The adjustment module 804 is configured to adjust the valve opening of the electronic expansion valve based on the first adjustment opening and the first adjustment opening correction value.

[0141] For the above-mentioned electronic expansion valve opening control device, after the electronic expansion valve of the air conditioner operates at a preset valve opening for a first preset duration, first control the electronic expansion valve to operate at a first adjustment opening. Since 1 / 2 of the target opening < the first adjustment opening < the target opening, controlling the electronic expansion valve to operate at the first adjustment opening can quickly position the valve opening near the target opening, so as to achieve the purpose of reducing the adjustment time of the electronic expansion valve when the difference between the exhaust temperature and the target exhaust temperature is large, and greatly saving the time to find the optimal valve opening. After the electronic expansion valve operates at the first adjustment opening for a second preset duration, then obtain the real-time exhaust temperature of the air conditioner, and correct the valve opening of the electronic expansion valve according to the comparison result between the real-time exhaust temperature and the preset temperature range, which can give a certain reaction time to the adjusted air conditioner, and obtain the real-time exhaust temperature when the exhaust of the air conditioner tends to be stable, which can effectively avoid the problem of overshoot of the exhaust temperature caused by the temperature difference between the valve opening and the exhaust temperature adjustment, improve the operating ability of the whole air-conditioning system, and reduce the energy consumption of the air conditioner.

[0142] In one embodiment, the correction value determination module is further configured to: if the real-time exhaust temperature of the air conditioner is less than the lower limit of the preset temperature range, determine that the first adjustment opening correction value is to decrease the target opening by 1 / 4.

[0143] In one embodiment, the correction value determination module is further configured to: if the real-time exhaust temperature of the air conditioner is greater than the upper limit of the preset temperature range, determine that the first adjustment opening correction value is to increase the target opening by 1 / 2.

[0144] In one embodiment, the adjustment module is further configured to: obtain a second adjustment opening based on the first adjustment opening and the first adjustment opening correction value; after controlling the electronic expansion valve to operate at the second adjustment opening for a third preset duration, update the exhaust temperature of the current air conditioner to the real-time exhaust temperature of the air conditioner; compare the real-time exhaust temperature of the air conditioner with the preset temperature range, and if the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the second adjustment opening and continue to operate.

[0145] In one embodiment, the electronic expansion valve opening control further includes: a second adjustment correction value acquisition module, configured to, if the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determine a second adjustment opening correction value according to the comparison result, and the second adjustment opening correction value is less than or equal to 1 / 4 of the target opening.

[0146] The adjustment module is further configured to: adjust the opening of the electronic expansion valve based on the second adjustment opening and the second adjustment opening correction value.

[0147] In one embodiment, the second adjustment correction value acquisition module is further configured to: if the real-time exhaust temperature of the air conditioner is less than the lower limit of the preset temperature range, determine that the first adjustment opening correction value is to decrease the target opening by 1 / 8.

[0148] In one embodiment, the second adjustment correction value acquisition module is further configured to: if the real-time exhaust temperature of the air conditioner is greater than the upper limit of the preset temperature range, determine that the first adjustment opening correction value is to increase the target opening by 1 / 4.

[0149] In one embodiment, the adjustment module is further configured to: obtain a third adjustment opening based on the second adjustment opening and the second adjustment opening correction value; after controlling the electronic expansion valve to operate at the third adjustment opening for a third preset duration, update the exhaust temperature of the current air conditioner to the real-time exhaust temperature of the air conditioner; compare the real-time exhaust temperature of the air conditioner with the preset temperature range, and if the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the third adjustment opening and continue to operate.

[0150] In one embodiment, the electronic expansion valve opening control further includes: a third adjustment correction value acquisition module, configured to determine a third adjustment opening correction value according to a comparison result if the real-time exhaust temperature of the air conditioner is not within a preset temperature range, and the third adjustment opening correction value is less than or equal to 1 / 8 of the target opening.

[0151] The adjustment module is further configured to adjust the opening of the electronic expansion valve based on the third adjustment opening and the third adjustment opening correction value.

[0152] In one embodiment, the third adjustment correction value acquisition module is further configured to: if the real-time exhaust temperature of the air conditioner is less than the lower limit value of the preset temperature range, determine that the first adjustment opening correction value is to decrease by 1 / 16 of the target opening.

[0153] In one embodiment, the third adjustment correction value acquisition module is further configured to: if the real-time exhaust temperature of the air conditioner is greater than the upper limit value of the preset temperature range, determine that the first adjustment opening correction value is to increase by 1 / 8 of the target opening.

[0154] In one embodiment, the adjustment module is further configured to: obtain a fourth adjustment opening based on the third adjustment opening and the third adjustment opening correction value; after controlling the electronic expansion valve to operate at the fourth adjustment opening for a first preset duration, update the exhaust temperature of the current air conditioner to the real-time exhaust temperature of the air conditioner; compare the real-time exhaust temperature of the air conditioner with the preset temperature range, and if the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the fourth adjustment opening and continue to operate.

[0155] In one embodiment, the electronic expansion valve opening control further includes: a fuzzy control module, configured to obtain the adjustment operation duration of the air conditioner and compare the adjustment operation duration of the air conditioner with a preset duration threshold; if the adjustment operation duration of the air conditioner is equal to the preset duration threshold, control the air conditioner to perform fuzzy control to adjust the opening of the electronic expansion valve.

[0156] Each module in the above electronic expansion valve opening control device can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor of the computer device in hardware form or be independent of it, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above respective modules.

[0157] In one embodiment, a computer device is provided, and the computer device can be a controller, and its internal structure diagram can be as Figure 9As shown. The computer device includes a processor, a memory, and a network interface connected by a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data such as a preset valve opening, a first preset duration, a first adjustment opening, a second preset duration, a real-time exhaust temperature, and a preset temperature range. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements an electronic expansion valve opening control method.

[0158] Those skilled in the art can understand that Figure 9 the structure shown in is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0159] In one embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, it implements the specific steps in the embodiment of the above-mentioned electronic expansion valve opening control method.

[0160] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by the processor, it implements the specific steps in the embodiment of the above-mentioned electronic expansion valve opening control method.

[0161] In one embodiment, a computer program product is provided, including a computer program. When the computer program is executed by the processor, it implements the specific steps in the embodiment of the above-mentioned electronic expansion valve opening control method.

[0162] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0163] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., without limitation.

[0164] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0165] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An electronic expansion valve opening control method, characterized in that The method includes: After the electronic expansion valve of the air conditioner operates at a preset valve opening for a first preset duration, controlling the electronic expansion valve to operate at a first adjusted opening for a second preset duration, where the first adjusted opening is greater than 1 / 2 of the target opening and less than the target opening; the first preset duration is the operating duration required to establish the overall machine pressure; the second preset duration is the buffering duration required to buffer the pressure and exhaust adjustment of the air conditioner after the initial adjustment of the electronic expansion valve in the initial stage of starting up. Obtaining the real-time exhaust temperature of the air conditioner and comparing the real-time exhaust temperature of the air conditioner with a preset temperature range. When the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining a first adjusted opening correction value according to the comparison result, where the first adjusted opening correction value is less than or equal to 1 / 2 of the target opening. Obtaining a second adjusted opening based on the first adjusted opening and the first adjusted opening correction value. After controlling the electronic expansion valve to operate at the second adjusted opening for a third preset duration, updating the exhaust temperature of the current air conditioner to the real-time exhaust temperature of the air conditioner; the third preset duration is the operating duration required to determine that the operation of the air conditioner tends to be stable again after the adjustment of the electronic expansion valve, and the time length of the third preset duration is equal to the sum of the time lengths of the first preset duration and the second preset duration. Comparing the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, controlling the electronic expansion valve to maintain the second adjusted opening and continue to operate. If the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining a second adjusted opening correction value according to the comparison result, where the second adjusted opening correction value is less than or equal to 1 / 4 of the target opening. Adjusting the opening of the electronic expansion valve based on the second adjusted opening and the second adjusted opening correction value.

2. The method according to claim 1, characterized in that The step of, when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining a first adjusted opening correction value according to the comparison result includes: If the real-time exhaust temperature of the air conditioner is less than the lower limit value of the preset temperature range, determining the first adjusted opening correction value as decreasing by 1 / 4 of the target opening.

3. The method according to claim 1, characterized in that, The step of, when the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining a first adjusted opening correction value according to the comparison result includes: If the real-time exhaust temperature of the air conditioner is greater than the upper limit value of the preset temperature range, determining the first adjusted opening correction value as increasing by 1 / 2 of the target opening.

4. The method according to claim 1, wherein The step of, if the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining a second adjusted opening correction value according to the comparison result includes: If the real-time exhaust temperature of the air conditioner is less than the lower limit value of the preset temperature range, determining the first adjusted opening correction value as decreasing by 1 / 8 of the target opening.

5. The method according to claim 1, wherein The step of, if the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining a second adjusted opening correction value according to the comparison result includes: If the real-time exhaust temperature of the air conditioner is greater than the upper limit value of the preset temperature range, determine that the first adjustment opening correction value is to increase the target opening by 1 / 4.

6. The method according to claim 1, characterized in that, Adjusting the opening of the electronic expansion valve based on the second adjustment opening and the second adjustment opening correction value includes: Obtaining a third adjustment opening based on the second adjustment opening and the second adjustment opening correction value; After controlling the electronic expansion valve to operate at the third adjustment opening for the third preset duration, update the current exhaust temperature of the air conditioner to the real-time exhaust temperature of the air conditioner; Compare the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the third adjustment opening and continue to operate.

7. The method according to claim 6, characterized in that, The method further includes: If the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determine a third adjustment opening correction value according to the comparison result, and the third adjustment opening correction value is less than or equal to 1 / 8 of the target opening; Adjust the opening of the electronic expansion valve based on the third adjustment opening and the third adjustment opening correction value.

8. The method according to claim 7, wherein The step of if the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining a third adjustment opening correction value according to the comparison result includes: If the real-time exhaust temperature of the air conditioner is less than the lower limit value of the preset temperature range, determine that the first adjustment opening correction value is to decrease the target opening by 1 / 16.

9. The method according to claim 7, characterized in that, The step of if the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determining a third adjustment opening correction value according to the comparison result includes: If the real-time exhaust temperature of the air conditioner is greater than the upper limit value of the preset temperature range, determine that the first adjustment opening correction value is to increase the target opening by 1 / 8.

10. The method according to claim 7, wherein Adjusting the opening of the electronic expansion valve based on the third adjustment opening and the third adjustment opening correction value includes: Obtaining a fourth adjustment opening based on the third adjustment opening and the third adjustment opening correction value; After controlling the electronic expansion valve to operate at the fourth adjustment opening for the first preset duration, update the current exhaust temperature of the air conditioner to the real-time exhaust temperature of the air conditioner; Compare the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the fourth adjustment opening and continue to operate.

11. The method according to claim 10, wherein The method further includes: Obtain the adjustment operation duration of the air conditioner, and compare the adjustment operation duration of the air conditioner with a preset duration threshold; If the adjustment operation duration of the air conditioner is equal to the preset duration threshold, control the air conditioner to perform fuzzy control to adjust the opening of the electronic expansion valve.

12. An electronic expansion valve opening control device, characterized in that, The device includes: The initial adjustment module is used to control the electronic expansion valve of the air conditioner to operate at a first adjustment opening for a second preset duration after the electronic expansion valve of the air conditioner operates at a preset valve opening for a first preset duration. The first adjustment opening is greater than 1 / 2 of the target opening and less than the target opening. The first preset duration is the operation duration required to establish the overall machine pressure. The second preset duration is the buffering duration required to buffer the pressure and exhaust adjustment of the air conditioner after the initial adjustment of the electronic expansion valve in the initial stage of startup. The comparison module is used to obtain the real-time exhaust temperature of the air conditioner and compare the real-time exhaust temperature of the air conditioner with a preset temperature range. The correction value determination module is used to determine a first adjustment opening correction value according to the comparison result when the real-time exhaust temperature of the air conditioner is not within the preset temperature range. The first adjustment opening correction value is less than or equal to 1 / 2 of the target opening. The adjustment module is used to obtain a second adjustment opening based on the first adjustment opening and the first adjustment opening correction value. After controlling the electronic expansion valve to operate at the second adjustment opening for a third preset duration, update the exhaust temperature of the current air conditioner to the real-time exhaust temperature of the air conditioner. The third preset duration is the operation duration required to determine that the operation of the air conditioner tends to be stable again after the adjustment of the electronic expansion valve. The time length of the third preset duration is equal to the sum of the time lengths of the first preset duration and the second preset duration. Compare the real-time exhaust temperature of the air conditioner with the preset temperature range. If the real-time exhaust temperature of the air conditioner is within the preset temperature range, control the electronic expansion valve to maintain the second adjustment opening and continue to operate. If the real-time exhaust temperature of the air conditioner is not within the preset temperature range, determine a second adjustment opening correction value according to the comparison result. The second adjustment opening correction value is less than or equal to 1 / 4 of the target opening. Based on the second adjustment opening and the second adjustment opening correction value, adjust the opening of the electronic expansion valve.

13. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 11.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the method according to any one of claims 1 to 11.

15. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method according to any one of claims 1 to 11.

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