Air conditioner control method, storage medium, electronic equipment and air conditioner

Abstract

The invention relates to the technical field of air conditioners, particularly provides an air conditioner control method, a storage medium, electronic equipment and an air conditioner, and aims to solve the problem that noise generated during refrigerant flowing is not suppressed in time. In order to achieve the purpose, the control method of the air conditioner comprises the steps that according to the current supercooling degree of a refrigerant at an outlet of a condenser and / or the current frequency of a compressor, the turbulent flow velocity threshold value correction value of the refrigerant is determined; according to the turbulence flow velocity threshold value correction value of the refrigerant and the current flow velocity of the refrigerant at the inlet of the evaporator, the opening degree adjusting amount of the electronic expansion valve is determined; and the opening degree of the electronic expansion valve is adjusted according to the opening degree adjusting amount of the electronic expansion valve. According to the method, the opening degree adjusting amount of the electronic expansion valve can be determined in real time, so that the opening degree, suitable for the current operation parameters, of the electronic expansion valve can be determined, control over the flow speed of the refrigerant is achieved, and the flow speed of the refrigerant is kept in a low-noise interval.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and specifically provides an air conditioner control method, a storage medium, an electronic device, and an air conditioner. BACKGROUND

[0002] During operation of an air conditioner, noise problems can occur in the flow of refrigerant. This is mainly due to the turbulent flow effect caused by excessively high flow rate of the refrigerant during flow.

[0003] In order to control the flow rate of the refrigerant to avoid the problem of noise generation, in the related art, the refrigerant pressure or the refrigerant temperature at one or more key positions such as the evaporator outlet, the compressor suction port vicinity, the condenser outlet, the compressor exhaust port, and the front of the expansion valve are monitored, and the flow rate during the flow of the refrigerant is adjusted or controlled according to the refrigerant pressure or the refrigerant temperature, so as to reduce the noise generated during the flow of the refrigerant.

[0004] However, controlling the flow rate of the refrigerant by the refrigerant pressure or the refrigerant temperature at these positions has a certain hysteresis, and it is difficult to accurately capture the turbulent flow critical state, resulting in a delay in the suppression of noise generated during the flow of the refrigerant, and poor noise reduction effect. SUMMARY

[0005] The present application aims to solve the above technical problems, i.e., to solve the problem of delayed suppression of noise generated during the flow of the refrigerant, and to provide an air conditioner control method, a storage medium, an electronic device, and an air conditioner.

[0006] The present application provides an air conditioner control method, comprising: determining a turbulent flow rate threshold correction value of refrigerant according to a current supercooling degree of the refrigerant at a condenser outlet and / or a current frequency of a compressor; determining an opening adjustment amount of an electronic expansion valve according to the turbulent flow rate threshold correction value of the refrigerant and a current flow rate of the refrigerant at an evaporator inlet; and adjusting the opening of the electronic expansion valve according to the opening adjustment amount of the electronic expansion valve.

[0007] In the technical scheme, the current supercooling degree of the refrigerant at the outlet of the condenser and / or the current frequency of the compressor are used to determine the current turbulent flow speed threshold correction value of the refrigerant, and then the opening adjustment amount of the electronic expansion valve is determined in real time based on the turbulent flow speed threshold correction value and the current flow speed of the refrigerant at the inlet of the evaporator, so that the opening of the electronic expansion valve suitable for the current operating parameters can be determined, and the opening of the electronic expansion valve is reduced based on the opening adjustment amount, thereby controlling the flow speed of the refrigerant and keeping the flow speed of the refrigerant in the low noise range, and the adaptability of the air conditioner is improved while the energy consumption of the air conditioner is reduced. Through real-time monitoring and adjustment, the air conditioner can quickly respond and make reasonable adjustments when the supercooling degree is abnormal and / or the frequency of the compressor fluctuates abnormally, so that the flow state of the refrigerant can be kept in the best range at all times, and noise can be suppressed in time, thereby ensuring the mute effect of the air conditioner and improving the overall performance and reliability of the equipment.

[0008] In an optional embodiment of the control method of the air conditioner, the determination of the turbulent flow speed threshold correction value of the refrigerant based on the current supercooling degree of the refrigerant at the outlet of the condenser and / or the current frequency of the compressor comprises: determining the current turbulent flow speed threshold of the refrigerant based on the current temperature, current pressure and current flow speed of the refrigerant at the inlet of the evaporator; and determining the turbulent flow speed threshold correction value of the refrigerant based on the current turbulent flow speed threshold of the refrigerant, the current supercooling degree of the refrigerant at the outlet of the condenser and / or the current frequency of the compressor.

[0009] In an optional embodiment of the control method of the air conditioner, the determination of the current turbulent flow speed threshold of the refrigerant based on the current temperature, current pressure and current flow speed of the refrigerant at the inlet of the evaporator comprises: determining the current flow state of the refrigerant based on the current temperature and current pressure of the refrigerant at the inlet of the evaporator; and determining the current turbulent flow speed threshold of the refrigerant based on the current flow state and current flow speed of the refrigerant.

[0010] In an optional embodiment of the control method of the air conditioner, the determination of the turbulent flow speed threshold correction value of the refrigerant based on the current turbulent flow speed threshold of the refrigerant, the current supercooling degree of the refrigerant at the outlet of the condenser and / or the current frequency of the compressor comprises: if the current supercooling degree is less than a preset supercooling degree value and the current frequency f of the compressor is greater than or equal to a preset frequency, determining the turbulent flow speed threshold correction value as V d *[1-0.05×(5-ΔT sc )]; and if the current supercooling degree is greater than or equal to the preset supercooling degree value and the current frequency of the compressor is less than the preset frequency, determining the turbulent flow speed threshold correction value of the refrigerant as V d*[1-0.02x(30-f)]; if the current supercooling degree is less than a preset supercooling degree value and the current frequency of the compressor is less than a preset frequency, determining the turbulence flow rate threshold correction value of the refrigerant as V d *[1-0.05x(5-ΔT sc )]*[1-0.02x(30-f)]; wherein V d represents the current turbulence flow rate threshold, ΔT sc represents the current supercooling degree of the refrigerant at the outlet of the condenser, and f represents the current frequency of the compressor.

[0011] In an optional embodiment of the control method of the air conditioner, the step of determining the opening adjustment amount of the electronic expansion valve according to the turbulence flow rate threshold correction value of the refrigerant and the current flow rate of the refrigerant at the inlet of the evaporator comprises: determining a current flow rate deviation e (k) = V-V' according to the turbulence flow rate threshold correction value of the refrigerant and the current flow rate of the refrigerant at the inlet of the evaporator; and if the current flow rate deviation e (k) is greater than a preset difference value, determining the opening adjustment amount of the electronic expansion valve according to the flow rate deviation as wherein V represents the current flow rate of the refrigerant at the inlet of the evaporator, V' represents the turbulence flow rate threshold correction value of the refrigerant, K p represents a proportional coefficient, K i represents an integral coefficient, and K d represents a differential coefficient, ΔY represents the opening adjustment amount, and e (k-1) represents the flow rate deviation of the previous current flow rate. represents the sum of errors from j=0 to j=k.

[0012] In an optional embodiment of the control method of the air conditioner, the step of determining the opening adjustment amount of the electronic expansion valve according to the turbulence flow rate threshold correction value of the refrigerant and the current flow rate of the refrigerant at the inlet of the evaporator further comprises: if the current flow rate deviation e (k) is less than or equal to a preset difference value, determining the opening adjustment amount of the electronic expansion valve according to the flow rate deviation as zero, and keeping the operating parameters of the air conditioner unchanged.

[0013] In an optional embodiment of the control method of the air conditioner, the step of adjusting the opening of the electronic expansion valve according to the opening adjustment amount of the electronic expansion valve comprises: determining a target opening of the electronic expansion valve according to the opening adjustment amount and the current opening of the electronic expansion valve, and controlling the opening of the electronic expansion valve to be adjusted to the target opening.

[0014] The application also provides a computer readable storage medium, wherein a plurality of program codes are stored, the program codes being adapted to be loaded and run by a processor to execute any one of the control methods of the air conditioners as described above.

[0015] The application also provides an electronic device comprising a processor and a storage device adapted to store a plurality of program codes adapted to be loaded and run by the processor to perform the control method of the air conditioner as described above.

[0016] The application also provides an air conditioner comprising the electronic device as described above. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiments of the application will be described below with reference to the accompanying drawings, in which:

[0018] Figure 1 is a flowchart of the control method of an air conditioner provided by the application;

[0019] Figure 2 is a flowchart of the control method of another air conditioner provided by the application;

[0020] Figure 3 is a flowchart of the control method of still another air conditioner provided by the application;

[0021] Figure 4 is a flowchart of the control method of still another air conditioner provided by the application;

[0022] Figure 5 is a structural diagram of an electronic device provided by the application. DETAILED DESCRIPTION

[0023] The preferred embodiments of the application will be described below with reference to the accompanying drawings, in which:

[0024] In the description of the application, the "processor" can include hardware, software or a combination of both. The processor can be a central processor, a microprocessor, a digital signal processor or any other suitable processor. The processor has data and signal processing functions. The processor can be implemented in software, hardware or a combination of both. The computer readable storage medium includes any suitable medium that can store program codes, such as a magnetic disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, etc.

[0025] Currently, in order to control the flow rate of the refrigerant to avoid the problem of noise generation, in the related art, the refrigerant pressure or the refrigerant temperature at one or more key positions such as the evaporator outlet, the compressor suction port vicinity, the condenser outlet, the compressor discharge port, and the front of the expansion valve is monitored, and the flow rate during the refrigerant flow is adjusted or controlled according to the refrigerant pressure or the refrigerant temperature to reduce the noise generated during the refrigerant flow. However, controlling the flow rate of the refrigerant through the refrigerant pressure or the refrigerant temperature at these positions has a certain hysteresis, and it is difficult to accurately capture the critical state of turbulent flow, resulting in a delay in the suppression of noise generated during the flow of the refrigerant, and poor noise reduction effect.

[0026] The present application provides a control method of an air conditioner to solve the problem of not timely suppressing noise generated during the flow of the refrigerant.

[0027] In combination with Figure 1 The control method of the air conditioner provided by the present application includes:

[0028] S11, determining a turbulent flow rate threshold correction value of the refrigerant according to the current supercooling degree of the refrigerant at the condenser outlet and / or the current frequency of the compressor.

[0029] S12, determining an opening adjustment amount of the electronic expansion valve according to the turbulent flow rate threshold correction value of the refrigerant and the current flow rate of the refrigerant at the evaporator inlet.

[0030] S13, adjusting the opening of the electronic expansion valve according to the opening adjustment amount of the electronic expansion valve.

[0031] During the operation of the air conditioner, many abnormal operating conditions occur, including the current supercooling degree of the refrigerant at the condenser outlet exceeding the preset range value of the supercooling degree, and the current frequency of the compressor being low. In the existing scheme, the opening of the electronic expansion valve is usually a fixed value, and when the current frequency of the compressor is low and / or the supercooling degree is low, there is a problem of hysteresis in the adjustment of the opening of the expansion valve. Therefore, under these conditions, the flow rate of the refrigerant is likely to exceed the critical value of turbulent flow and cause flow noise.

[0032] Corresponding to this, in the present scheme, a temperature sensor is arranged at the refrigerant outlet of the condenser to detect the current refrigerant temperature at the refrigerant outlet of the condenser. The information processing module built in the air conditioner can determine the condensing pressure of the condenser and the corresponding saturated condensing temperature according to the refrigerant temperature at the refrigerant outlet of the condenser. The information processing module determines the supercooling degree of the refrigerant at the outlet according to the current refrigerant temperature and the saturated condensing temperature.

[0033] Optionally, the information processing module stores a refrigerant saturation characteristic table, which is used to determine the condensing pressure and the saturated condensing temperature corresponding to the current refrigerant temperature.

[0034] Alternatively, a pressure sensing device is arranged inside the condenser, and the condensing pressure of the condenser is obtained by the pressure sensing device.

[0035] Further, the scheme further arranges a current sensor at the motor driving side of the compressor, and the operating frequency of the compressor is determined by the current obtained by the current sensor. Alternatively, the operating frequency of the compressor can be determined according to the formula: f = I / I e , wherein I represents the current value detected by the current sensor, I e is the rated current of the compressor when operating at the rated voltage and the rated power. The current frequency of the compressor is obtained by detecting the current value, which is real-time and accurate, and can more accurately reflect the actual operating state of the compressor. This way can avoid the hysteresis problem caused by obtaining the current frequency of the compressor through other indirect parameters, and can improve the response speed and accuracy of the refrigerant flow rate control.

[0036] In the scheme, the turbulent flow rate threshold correction value of the refrigerant is determined according to the current supercooling degree and the current frequency of the compressor, and further, the opening adjustment amount of the electronic expansion valve is determined according to the current flow rate of the refrigerant at the evaporator inlet. After determining the opening adjustment amount of the electronic expansion valve, the opening of the electronic expansion valve is regulated to reduce the flow speed of the refrigerant, thereby reducing the noise generated by the flow of the refrigerant.

[0037] In the case of adopting the above technical scheme, the current turbulent flow rate threshold correction value of the refrigerant can be determined through the current supercooling degree of the refrigerant at the condenser outlet and / or the current frequency of the compressor; further, the opening adjustment amount of the electronic expansion valve is determined in real time through the turbulent flow rate threshold correction value and the current flow rate of the refrigerant at the evaporator inlet, so that the opening of the electronic expansion valve suitable for the current operating parameters can be determined, thereby realizing the control of the refrigerant flow rate, maintaining the refrigerant flow rate in the low noise interval, and further improving the adaptability of the air conditioner while reducing the energy consumption of the air conditioner. Through real-time monitoring and adjustment, the air conditioner can quickly respond and make reasonable adjustments when the supercooling degree is abnormal and / or the compressor frequency fluctuates abnormally, so as to ensure that the flow state of the refrigerant always remains in the best interval, and to suppress noise in time, thereby ensuring the mute effect of the air conditioner and improving the overall performance and reliability of the equipment.

[0038] In combination with Figure 2 , the turbulent flow rate threshold correction value of the refrigerant is determined according to the current supercooling degree of the refrigerant at the condenser outlet and / or the current frequency of the compressor, including:

[0039] S21, determining the current turbulent flow rate threshold of the refrigerant according to the current temperature, current pressure and current flow rate of the refrigerant at the evaporator inlet.

[0040] S22, determining a turbulent flow velocity threshold value of the refrigerant according to the current turbulent flow velocity threshold value of the refrigerant, and the current supercooling degree of the refrigerant at the outlet of the condenser and / or the current frequency of the compressor.

[0041] In this scheme, the current flow state of the refrigerant is determined according to the current temperature, the current pressure and the current flow velocity of the refrigerant at the inlet of the evaporator. The current flow state herein includes liquid phase, gas phase or gas-liquid two-phase flow state.

[0042] Through the above scheme, the current turbulent flow velocity threshold value of the refrigerant can be corrected, so as to obtain the turbulent flow velocity threshold value of the refrigerant in real time. After the turbulent flow velocity threshold value of the refrigerant is determined, the deviation value of the refrigerant flow is calculated further in combination with the current flow velocity of the refrigerant at the inlet of the evaporator, and the opening adjustment amount of the opening of the electronic expansion valve is obtained according to the deviation value. This dynamic adjustment mechanism can effectively cope with the problem of excessively high refrigerant flow velocity caused by abnormal operating parameters during the operation of the air conditioner. In this way, not only can the refrigerant flow velocity be ensured to always remain in the ideal low noise interval, but also the stability and energy efficiency ratio of the system can be significantly improved.

[0043] In the optional embodiment of the control method of the air conditioner, the current turbulent flow velocity threshold value of the refrigerant is determined according to the current temperature, the current pressure and the current flow velocity of the refrigerant at the inlet of the evaporator, which includes: determining the current flow state of the refrigerant according to the current temperature and the current pressure of the refrigerant at the inlet of the evaporator; and determining the current turbulent flow velocity threshold value of the refrigerant according to the current flow state and the current flow velocity of the refrigerant.

[0044] Specifically, the property parameters of the refrigerant can be determined according to the current temperature and the current pressure of the refrigerant at the inlet of the evaporator. The determined property parameters of the refrigerant include the density and dynamic viscosity of the refrigerant. Further, in combination with the current flow velocity of the refrigerant at the inlet of the evaporator, the current turbulent threshold value of the refrigerant can be determined. It should be noted that the diameter of the pipe section at the inlet of the evaporator needs to be obtained to calculate the turbulent threshold value of the refrigerant. The diameter of the pipe section at the inlet of the evaporator can be directly pre-stored in the information processing module, or a measuring device can be arranged at the inlet to upload the diameter or radius of the pipe section in real time.

[0045] Specifically, the applicant has found that if the current flow state of the refrigerant at the inlet of the evaporator is liquid phase, the turbulent threshold value Re l >2300; and if the current flow state of the refrigerant at the inlet of the evaporator is gas-liquid phase, the turbulent threshold value Re g >4000. Therefore, the property parameters of the refrigerant, including the density and viscosity, can be determined according to the current temperature and the current pressure of the refrigerant. Further, the current turbulent threshold value of the refrigerant can be determined according to the current flow velocity of the refrigerant at the inlet of the evaporator, so as to determine the current flow state of the refrigerant.

[0046] Further, if the current flow state of the refrigerant at the evaporator inlet is gas-liquid two-phase state and the liquid phase is dominant in the gas-liquid two-phase state, the turbulent flow threshold Re tp-l ≥2000, and further determines the current turbulent flow velocity threshold by the physical parameters of the current refrigerant and the current flow rate. If the refrigerant at the evaporator inlet is gas-liquid two-phase state and the gas phase is dominant in the gas-liquid two-phase state, the turbulent flow threshold Re tp-g ≥4000, and further determines the current turbulent flow velocity threshold by the physical parameters of the current refrigerant and the current flow rate.

[0047] It should be noted that generally the refrigerant flowing out of the condenser outlet is liquid-phase refrigerant, that is, after throttling and pressure reduction of the electronic expansion valve, the refrigerant at the evaporator inlet may be liquid-phase refrigerant dominant even if it is in gas-liquid two-phase state.

[0048] In the scheme, further, the current turbulent flow velocity threshold of the refrigerant, and the current supercooling degree of the refrigerant at the condenser outlet and / or the current frequency of the compressor are combined to calculate and obtain the turbulent flow velocity threshold correction value of the refrigerant.

[0049] Through the above scheme, the current turbulent flow velocity threshold of the refrigerant at the evaporator inlet can be accurately determined, so as to provide an accurate basis for subsequent calculation and ensure the accuracy of the opening correction of the electronic expansion valve.

[0050] In the optional embodiment of the control method of the air conditioner, the turbulent flow velocity threshold correction value of the refrigerant is determined according to the current turbulent flow velocity threshold of the refrigerant, and the current supercooling degree of the refrigerant at the condenser outlet and / or the current frequency of the compressor, including: if the current supercooling degree is less than a preset supercooling degree value and the current frequency f of the compressor is greater than or equal to a preset frequency, the turbulent flow velocity threshold correction value is determined as V d *[1-0.05×(5-ΔT sc )]; if the current supercooling degree is greater than or equal to the preset supercooling degree value and the current frequency of the compressor is less than the preset frequency, the turbulent flow velocity threshold correction value of the refrigerant is determined as V d *[1-0.02×(30-f)]; and if the current supercooling degree is less than the preset supercooling degree value and the current frequency of the compressor is less than the preset frequency, the turbulent flow velocity threshold correction value of the refrigerant is determined as V d *[1-0.05×(5-ΔT sc )]*[1-0.02×(30-f)].

[0051] Wherein, V d represents the current turbulent flow velocity threshold, ΔT sc represents the current supercooling degree of the refrigerant at the condenser outlet, and f represents the current frequency of the compressor.

[0052] In the scheme, if the current supercooling degree is less than the preset supercooling degree value and the current frequency f of the compressor is greater than or equal to the preset frequency, it is indicated that the air conditioner only has the problem of supercooling degree anomaly. If the opening of the electronic expansion valve cannot respond in time to reduce the opening, the flow rate of the refrigerant will be too high and noise will occur. At this time, only the supercooling degree is used to determine the turbulent flow rate threshold correction value, that is, the turbulent flow rate threshold correction value of the refrigerant is determined according to the formula V d *[1-0.05×(5-ΔT sc )].

[0053] If the current supercooling degree is greater than or equal to the preset supercooling degree value and the current frequency of the compressor is less than the preset frequency, it is indicated that the air conditioner only has the condition of low frequency operation of the compressor, that is, low frequency operation. At this time, only the operating frequency of the compressor is used to determine the turbulent flow rate threshold correction value, that is, the turbulent flow rate threshold correction value of the refrigerant is determined according to the formula V d *[1-0.02×(30-f)], and then the opening of the electronic expansion valve is reduced according to the obtained opening adjustment amount.

[0054] If the current supercooling degree is less than the preset supercooling degree value and the current frequency of the compressor is less than the preset frequency, it is indicated that the air conditioner is in low frequency operation and the current refrigerant has supercooling degree anomaly. At this time, the supercooling degree and the current frequency of the compressor are used to determine the turbulent flow rate threshold correction value, that is, the turbulent flow rate threshold correction value of the refrigerant is determined according to the formula V d *[1-0.05×*(5-ΔT sc )]*[1-0.02×(30-f)], and then the opening of the electronic expansion valve is reduced according to the obtained opening adjustment amount.

[0055] Through the above scheme, the current turbulent flow rate threshold of the refrigerant can be corrected in time to obtain an accurate turbulent flow rate threshold correction value of the refrigerant, thereby facilitating improvement of the accuracy of the opening adjustment amount of the electromagnetic expansion valve.

[0056] As shown in FIG. Figure 3 , the opening adjustment amount of the electronic expansion valve is determined according to the turbulent flow rate threshold correction value of the refrigerant and the current flow rate of the refrigerant at the inlet of the evaporator, comprising:

[0057] S31, the current flow rate deviation e (k) = V-V' is determined according to the turbulent flow rate threshold correction value of the refrigerant and the current flow rate of the refrigerant at the inlet of the evaporator.

[0058] S32, if the current flow rate deviation e (k) is greater than the preset difference value, the opening adjustment amount of the electronic expansion valve is determined according to the flow rate deviation

[0059]

[0060] Wherein, V represents the current flow rate of the refrigerant at the evaporator inlet, V' represents the threshold correction value of the turbulent flow rate of the refrigerant, K p represents the proportional coefficient, K i represents the integral coefficient, K d represents the differential coefficient, and ΔY represents the opening adjustment amount, e (k-1) represents the flow rate deviation of the previous current flow rate. represents the error sum from j=0 to j=k.

[0061] In the present scheme, if the current flow rate deviation e (k) is greater than the preset difference value, it indicates that the current flow rate of the refrigerant exceeds the threshold correction value of the turbulent flow rate of the refrigerant, that is, the flow state of the refrigerant is in a turbulent state. In order to keep the flow state of the refrigerant in a laminar flow state, the opening of the electronic expansion valve needs to be dynamically adjusted in real time at this time to adapt to the operation of the air conditioner, thereby reducing the flow rate of the refrigerant to reduce the noise of the refrigerant. Specifically, the opening of the electronic expansion valve needs to be reduced according to the opening adjustment amount. The value of the preset difference value is set before leaving the factory. Preferably, the value of the preset difference value is zero.

[0062] Wherein, the PID control algorithm is used in the present scheme to calculate and optimize the opening adjustment amount of the electronic expansion valve. Wherein, the proportional coefficient K p is used to quickly respond to the flow rate deviation, the integral coefficient K i is used to eliminate static error, and the differential coefficient K d is used to predict the flow rate trend and suppress system oscillation. By reasonably configuring the PID parameters, the opening adjustment amount of the electronic expansion valve can be more accurate, so that the adjustment when the opening of the electronic expansion valve is reduced is more smooth and accurate.

[0063] Further, after determining the opening adjustment amount of the electronic expansion valve, the information processing module can generate a control signal according to the opening adjustment amount and transmit it to the driving unit of the electronic expansion valve. After receiving the control signal, the driving unit of the electronic expansion valve accurately reduces the opening of the electronic expansion valve to realize dynamic control of the flow rate of the refrigerant.

[0064] Through the above method, the present scheme realizes fine control of the flow rate of the refrigerant, not only effectively reduces the noise caused by the flow of the refrigerant, but also significantly improves the overall operation efficiency of the air conditioner and user experience.

[0065] According to the threshold correction value of the turbulent flow rate of the refrigerant and the current flow rate of the refrigerant at the evaporator inlet, the opening adjustment amount of the electronic expansion valve is determined, which further comprises: if the current flow rate deviation e (k) is less than or equal to the preset difference value, the opening adjustment amount of the electronic expansion valve is determined to be zero, and the operating parameters of the air conditioner remain unchanged.

[0066] If the current flow rate deviation e (k) If the current flow rate deviation e (k) If the current flow rate deviation e

[0067] By this scheme, over-regulation or incorrect regulation of the opening degree of the electronic expansion valve can be avoided, thereby ensuring the stability of the air conditioner during operation, thereby reducing system fluctuations or energy loss that may be caused by frequent adjustment of the opening degree of the electronic expansion valve.

[0068] In combination with the above technical details, this scheme realizes comprehensive management of the refrigerant flow rate through multi-level dynamic regulation strategy. Whether it is supercooling degree anomaly or compressor frequency fluctuation, the system can quickly respond and make reasonable adjustment to ensure that the refrigerant flow state always remains in the best interval. This not only improves the silence effect of the air conditioner, but also improves the overall performance and reliability of the air conditioner, bringing users a more comfortable and energy-saving use experience.

[0069] In combination with Figure 4 As shown in FIG. 8, the opening degree of the electronic expansion valve is adjusted according to the opening degree adjustment amount of the electronic expansion valve, including:

[0070] S41, determining the target opening degree of the electronic expansion valve according to the opening degree adjustment amount and the current opening degree of the electronic expansion valve, and controlling the opening degree of the electronic expansion valve to adjust to the target opening degree.

[0071] S42, after the first time length, determining the turbulent flow rate threshold correction value and the flow rate of the refrigerant at the inlet of the evaporator again.

[0072] In this way, after the opening degree of the electronic expansion valve is reduced to the target opening degree and continues to run for the first time length, the turbulent flow rate threshold correction value and the flow rate of the refrigerant at the inlet of the evaporator are obtained again. According to the turbulent flow rate threshold correction value and the flow rate of the refrigerant at the inlet of the evaporator obtained again, the flow rate deviation of the refrigerant is determined again. According to the flow rate deviation of the refrigerant determined again, the opening degree adjustment amount of the electronic expansion valve is determined again, and then the opening degree of the electronic expansion valve is adjusted, so as to ensure that the air conditioner always operates at low noise and improve comfort.

[0073] Optionally, the first time length is set when the air conditioner is manufactured. Optionally, the first time length can be 1 minute, 3 minutes, 6 minutes, etc.

[0074] In this scheme, the actual flow rate of the refrigerant can be re-evaluated after the first time length of adjusting the opening degree of the electronic expansion valve each time. If the flow rate deviation still exists, the turbulent flow rate threshold of the refrigerant is corrected again to obtain the adjustment amount of the electronic expansion valve again to adjust the opening degree of the electronic expansion valve, i.e., to reduce the opening degree of the electronic expansion valve, thereby realizing continuous optimization and dynamic management of the refrigerant flow rate. In addition, such a dynamic regulation method not only can improve the response speed of the air conditioner, but also can effectively avoid performance fluctuation problems caused by insufficient or excessive adjustment.

[0075] In an optional embodiment of the control method of the air conditioner, after determining the target opening degree of the electronic expansion valve according to the opening degree adjustment amount and the current opening degree, the method further includes: if the target opening degree of the electronic expansion valve is less than or equal to the minimum opening degree threshold of the electronic expansion valve, controlling the electronic expansion valve to operate according to the minimum opening degree threshold.

[0076] In this scheme, when determining the target opening degree of the electronic expansion valve, if the calculated target opening degree is less than or equal to the minimum opening degree threshold of the electronic expansion valve, the opening degree of the electronic expansion valve is directly adjusted to the minimum opening degree threshold for operation. In this way, it can be ensured that the electronic expansion valve will not affect the normal flow of the refrigerant due to excessive closing, while avoiding system abnormalities caused by too small opening degree.

[0077] The minimum opening degree threshold is usually determined by the design parameters of the air conditioner and is set before the device is manufactured. In this way, the system can effectively prevent performance problems or potential risks caused by too low opening degree while ensuring stable refrigerant flow rate.

[0078] Optionally, the minimum opening degree threshold can also be dynamically optimized in combination with historical operation data. Specifically, the information processing module of the air conditioner can record the actual operation data of the electronic expansion valve under different working conditions, and identify a more optimal minimum opening degree threshold through data analysis. In this way, it can better adapt to the user's usage habits and environmental changes, thereby realizing more accurate and efficient flow rate management of the refrigerant.

[0079] Further, after controlling the electronic expansion valve to operate according to the minimum opening degree threshold, the turbulent flow rate threshold correction value and the flow rate of the refrigerant at the inlet of the evaporator can be determined again after a second time length. If the difference between the turbulent flow rate threshold correction value and the flow rate of the refrigerant at the inlet of the evaporator is less than or equal to zero, the air conditioner continues to operate according to the current parameters, and if the difference between the turbulent flow rate threshold correction value and the flow rate of the refrigerant at the inlet of the evaporator is greater than zero, a fault alarm can be issued.

[0080] Optionally, the second duration is set before the device leaves the factory. Optionally, the second duration is 5 minutes, 10 minutes, 15 minutes, etc.

[0081] The above control scheme can not only enhance the adaptability of air conditioners, but also improve their operational stability under complex operating conditions.

[0082] Furthermore, this application also provides an electronic device. Figure 5 This is a schematic diagram of the main structure of an electronic device according to an embodiment of this application. Figure 5 As shown, the electronic device in this embodiment mainly includes a processor 501 and a storage device 502. The storage device 502 can be configured to store a program for executing the air conditioner control method of the above-described method embodiment. The processor 1001 can be configured to execute the program in the storage device 502, which includes, but is not limited to, a program for executing the air conditioner control method of the above-described method embodiment. For ease of explanation, only the parts related to the embodiments of this application are shown. For specific technical details not disclosed, please refer to the method section of the embodiments of this application.

[0083] Furthermore, in some possible embodiments of this application, the electronic device may include multiple processors 501 and multiple storage devices 502. The program executing the program-initiated control method of the above-described method embodiments can be divided into multiple subroutines, each of which can be loaded and run by a processor 501 to execute different steps of the program-initiated control method of the above-described method embodiments. Specifically, each subroutine can be stored in a different storage device 502, and each processor 501 can be configured to execute programs in one or more storage devices 502 to jointly implement the air conditioner control method of the above-described method embodiments; that is, each processor 501 executes different steps of the program-initiated control method of the above-described method embodiments to jointly implement the air conditioner control method of the above-described method embodiments.

[0084] The aforementioned multiple processors 501 can be processors deployed on the same device. For example, the aforementioned electronic device can be a high-performance device composed of multiple processors, and the aforementioned multiple processors 1001 can be processors configured on that high-performance device. Alternatively, the aforementioned multiple processors 1001 can also be processors deployed on different devices. For example, the aforementioned electronic device can be a server cluster, and the aforementioned multiple processors 501 can be processors on different servers within the server cluster.

[0085] Further, the present application also provides a computer readable storage medium. In an embodiment of the computer readable storage medium according to the present application, the computer readable storage medium can be configured to store a program of the control method of the air conditioner, which can be loaded and run by the processor to implement the control method of the air conditioner. For the convenience of description, only the parts related to the embodiments of the present application are shown, and the specific technical details are not disclosed. Please refer to the method part of the embodiments of the present application. The computer readable storage medium can be a storage device formed by various electronic devices. Optionally, the computer readable storage medium in the embodiments of the present application is a non-transitory computer readable storage medium.

[0086] Further, the present application also provides an air conditioner. In an embodiment of the air conditioner according to the present application, the air conditioner can include the electronic device in the above-mentioned electronic device embodiment.

[0087] Those skilled in the art can understand that all or part of the processes in the method of the above-mentioned embodiment of the present application can also be completed by a computer program instructing related hardware. The above-mentioned computer program can be stored in a computer readable storage medium, and when the processor executes the computer program, the steps of the above-mentioned various method embodiments can be implemented. The above-mentioned computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms, etc. The above-mentioned computer readable storage medium can include any entity or device, medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal and software distribution medium, etc. that can carry the above-mentioned computer program code.

[0088] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A method for controlling an air conditioner, characterized in that, include: Determine the refrigerant turbulence velocity threshold correction value based on the current subcooling of the refrigerant at the condenser outlet and / or the current frequency of the compressor. The opening adjustment amount of the electronic expansion valve is determined based on the turbulent flow velocity threshold correction value of the refrigerant and the current flow velocity of the refrigerant at the evaporator inlet. The opening degree of the electronic expansion valve is adjusted according to the opening degree adjustment amount of the electronic expansion valve.

2. The control method according to claim 1, characterized in that, The step of determining the refrigerant turbulent velocity threshold correction value based on the current subcooling of the refrigerant at the condenser outlet and / or the current frequency of the compressor includes: The current turbulent velocity threshold of the refrigerant is determined based on the current temperature, pressure, and flow rate of the refrigerant at the evaporator inlet. The turbulent velocity threshold correction value of the refrigerant is determined based on the current turbulent velocity threshold of the refrigerant, the current subcooling of the refrigerant at the condenser outlet, and / or the current frequency of the compressor.

3. The control method according to claim 2, characterized in that, The step of determining the current turbulent velocity threshold of the refrigerant based on the current temperature, current pressure, and current flow rate of the refrigerant at the evaporator inlet includes: Determine the current flow state of the refrigerant based on its current temperature and pressure at the evaporator inlet; The current turbulent velocity threshold of the refrigerant is determined based on the current flow state and current velocity of the refrigerant.

4. The control method according to claim 2, characterized in that, The step of determining the refrigerant turbulent velocity threshold correction value based on the current turbulent velocity threshold of the refrigerant, the current subcooling of the refrigerant at the condenser outlet, and / or the current frequency of the compressor includes: If the current subcooling is less than a preset subcooling value and the current frequency f of the compressor is greater than or equal to a preset frequency, the turbulent flow velocity threshold correction value is determined to be V. d *[1-0.05×(5-ΔT sc )]; If the current subcooling is greater than or equal to a preset subcooling value and the current frequency of the compressor is less than a preset frequency, the turbulent flow velocity threshold correction value of the refrigerant is determined to be V. d *[1-0.02×(30-f)]; If the current subcooling degree is less than the preset subcooling degree value and the current frequency of the compressor is less than the preset frequency, the turbulent flow velocity threshold correction value of the refrigerant is determined to be V. d *[1-0.05×*(5-ΔT sc )]*[1-0.02×(30-f)]; Among them, V d ΔT represents the current turbulent velocity threshold. sc This represents the current subcooling of the refrigerant at the condenser outlet, and f represents the current frequency of the compressor.

5. The control method according to claim 1, characterized in that, The step of determining the opening adjustment amount of the electronic expansion valve based on the turbulent flow velocity threshold correction value of the refrigerant and the current flow velocity of the refrigerant at the evaporator inlet includes: Based on the turbulent velocity threshold correction value of the refrigerant and the current refrigerant velocity at the evaporator inlet, the current velocity deviation is determined to be e. (k) =V-V'; If the current flow velocity deviation e (k) If the deviation is greater than the preset difference, the opening adjustment amount of the electronic expansion valve is determined based on the flow rate deviation. Where V represents the current refrigerant velocity at the evaporator inlet, V' represents the refrigerant turbulent velocity threshold correction value, and K p Represents the proportionality coefficient, K i Represents the integral coefficient, K d Represents the differential coefficient, ΔY represents the opening adjustment amount, and e (k-1) This represents the previous velocity deviation before the current velocity deviation; This represents the total error from j=0 to j=k.

6. The control method according to claim 5, characterized in that, The step of determining the opening adjustment amount of the electronic expansion valve based on the turbulent flow velocity threshold correction value of the refrigerant and the current flow velocity of the refrigerant at the evaporator inlet also includes: If the current flow velocity deviation e (k) If the difference is less than or equal to the preset value, the opening adjustment of the electronic expansion valve is determined to be zero, and the operating parameters of the air conditioner are kept unchanged.

7. The control method according to any one of claims 1 to 6, characterized in that, The step of adjusting the opening of the electronic expansion valve according to the opening adjustment amount of the electronic expansion valve includes: Based on the opening adjustment amount and the current opening of the electronic expansion valve, the target opening of the electronic expansion valve is determined, and the opening of the electronic expansion valve is controlled to be adjusted to the target opening.

8. A computer-readable storage medium storing a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by a processor to perform the air conditioning control method according to any one of claims 1 to 7.

9. An electronic device comprising a processor and a storage device, said storage device being adapted to store a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by the processor to perform the air conditioning control method according to any one of claims 1 to 7.

10. An air conditioner, characterized in that, The air conditioner includes the electronic device as described in claim 9.

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