Air conditioner control method and device, air conditioner and storage medium

Abstract

The invention relates to an air conditioner control method and device, an air conditioner and a storage medium, and the air conditioner control method comprises the steps that the current step number and the to-be-corrected step number of an electronic expansion valve in the air conditioner are obtained; the fluctuation condition of the air conditioner indoor unit inlet and outlet pipe temperature superheat degree is obtained to determine a correction coefficient; determining a to-be-adjusted step number according to the correction coefficient, the to-be-corrected step number and the current step number; and controlling the opening degree of an electronic expansion valve in the air conditioner according to the to-be-adjusted step number. According to the embodiment of the invention, the over-regulation amplitude of the temperature superheat degree of the inlet and outlet pipes of the indoor units caused by temperature response lag can be effectively reduced, the regulation stride of the electronic expansion valve is reduced, and over-regulation can be slowed down, so that the temperature fluctuation amplitude caused by over-regulation is reduced, the problem of superheat degree fluctuation of multiple indoor units is improved, and the operation stability and unit performance of an air conditioning system are improved; and the requirements of energy conservation and emission reduction are met.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an air conditioning control method, device, air conditioner and storage medium. Background Technology

[0002] During the operation of an air conditioning system, the inlet and outlet pipe temperatures of the indoor unit are key parameters affecting system performance. In the current context of energy conservation and emission reduction, precise control and optimization of the inlet and outlet pipe temperatures of the indoor unit have significant engineering practical value and energy-saving benefits.

[0003] In current practical engineering, the temperature of the indoor unit's inlet and outlet pipes is generally indirectly controlled by adjusting the superheat of the pipes. However, this control strategy has obvious response lag, which can easily lead to over-adjustment of the electronic expansion valve, causing repeated fluctuations in temperature parameters, and ultimately having an adverse effect on the operational stability and energy efficiency of the air conditioning unit. Summary of the Invention

[0004] To address the technical problem of over-adjustment of electronic expansion valves in air conditioners, this application provides an air conditioner control method, device, air conditioner, and storage medium.

[0005] In a first aspect, this application provides an air conditioning control method, including: Obtain the current step number and the number of steps to be corrected for the electronic expansion valve in the air conditioner; To determine the correction factor, the fluctuation of the superheat of the indoor unit's inlet and outlet pipe temperatures is obtained. The number of steps to be adjusted is determined based on the correction coefficient, the number of steps to be corrected, and the current number of steps. The opening degree of the electronic expansion valve in the air conditioner is controlled according to the number of adjustment steps.

[0006] Optionally, the fluctuation of the superheat of the indoor unit's inlet and outlet pipe temperatures is obtained to determine the correction factor, including: The fluctuation range and duration of the superheat of the indoor unit inlet and outlet pipe temperatures relative to the target superheat are obtained. The target superheat is determined based on the indoor unit inlet and outlet pipe temperature superheat that enables the indoor unit inlet and outlet pipe temperatures to reach the target control temperature. The fluctuation coefficient is determined based on the fluctuation amplitude. The time coefficient is determined based on the duration of the fluctuation. The correction coefficient is determined based on the fluctuation coefficient and the time coefficient.

[0007] Optionally, the fluctuation range and duration of the superheat of the indoor unit's inlet and outlet pipe temperatures relative to the target superheat are obtained, including: The difference between the superheat of the indoor unit inlet and outlet pipe temperatures and the target superheat is determined as the fluctuation range; The duration for which the overheating of the indoor unit's inlet and outlet pipe temperatures remains within a preset fluctuation range is determined to obtain the fluctuation duration.

[0008] Optionally, determining the fluctuation coefficient based on the fluctuation amplitude includes: Among multiple preset fluctuation ranges, a target fluctuation range corresponding to the fluctuation range is determined; In the preset correspondence between fluctuation range and fluctuation reference coefficient, the fluctuation reference coefficient corresponding to the target fluctuation range is determined as the fluctuation coefficient.

[0009] Optionally, determining the time coefficient based on the fluctuation duration includes: Among multiple preset fluctuation duration ranges, a target fluctuation duration range corresponding to the fluctuation duration is determined; In the preset correspondence between fluctuation duration range and time coefficient determination method, the time coefficient determination method corresponding to the target fluctuation duration range is determined as the target time coefficient determination method; Calculate the time coefficient according to the method for determining the target time coefficient.

[0010] Optionally, determining the correction coefficient based on the fluctuation coefficient and the time coefficient includes: Calculate the product of the fluctuation coefficient and the time coefficient; The product is determined as the correction coefficient.

[0011] Optionally, determining the number of steps to be adjusted based on the correction coefficient, the number of steps to be corrected, and the current step number includes: The step correction amount is determined based on the number of steps to be corrected and the correction coefficient; The current step number is corrected using the step correction amount to obtain the step number to be adjusted.

[0012] Secondly, this application provides an air conditioning control device, comprising: The first acquisition module is used to acquire the current step number and the number of steps to be corrected of the electronic expansion valve in the air conditioner; The second acquisition module is used to acquire the fluctuation of the superheat of the indoor unit inlet and outlet pipe temperatures of the air conditioner in order to determine the correction coefficient. The determining module is used to determine the number of steps to be adjusted based on the correction coefficient, the number of steps to be corrected, and the current number of steps. The control module is used to control the opening degree of the electronic expansion valve in the air conditioner according to the number of adjustment steps.

[0013] Optionally, the second acquisition module includes: The first acquisition unit is used to acquire the fluctuation range and fluctuation duration of the superheat of the indoor unit inlet and outlet pipe temperature relative to the target superheat. The target superheat is determined based on the superheat of the indoor unit inlet and outlet pipe temperature that enables the indoor unit inlet and outlet pipe temperature to reach the target control temperature. The first determining unit is used to determine the fluctuation coefficient based on the fluctuation amplitude. The second determining unit is used to determine the time coefficient based on the fluctuation duration; The third determining unit is used to determine the correction coefficient based on the fluctuation coefficient and the time coefficient.

[0014] Optionally, the first acquisition unit includes: The fourth determining unit is used to determine the difference between the superheat of the indoor unit inlet and outlet pipe temperature and the target superheat as the fluctuation range; The fifth determining unit is used to determine the duration for which the overheating of the indoor unit's inlet and outlet pipe temperatures remains within a preset fluctuation range, so as to obtain the fluctuation duration.

[0015] Optionally, the first determining unit is further configured to: Among multiple preset fluctuation ranges, a target fluctuation range corresponding to the fluctuation range is determined; In the preset correspondence between fluctuation range and fluctuation reference coefficient, the fluctuation reference coefficient corresponding to the target fluctuation range is determined as the fluctuation coefficient.

[0016] Optionally, the second determining unit is further configured to: Among multiple preset fluctuation duration ranges, a target fluctuation duration range corresponding to the fluctuation duration is determined; In the preset correspondence between fluctuation duration range and time coefficient determination method, the time coefficient determination method corresponding to the target fluctuation duration range is determined as the target time coefficient determination method; Calculate the time coefficient according to the method for determining the target time coefficient.

[0017] Optionally, the third determining unit is also used for: Calculate the product of the fluctuation coefficient and the time coefficient; The product is determined as the correction coefficient.

[0018] Optionally, the determining module includes: The sixth determining unit is used to determine the step correction amount based on the number of steps to be corrected and the correction coefficient; The correction unit is used to correct the current step number using the step correction amount to obtain the step number to be adjusted.

[0019] Thirdly, this application provides an air conditioner, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; The processor, when executing a program stored in memory, implements the air conditioning control method described in any of the first aspects.

[0020] Fourthly, this application provides a computer-readable storage medium storing a program for an air conditioning control method, wherein when the program for the air conditioning control method is executed by a processor, it implements the steps of any of the air conditioning control methods described in the first aspect.

[0021] The technical solutions provided in this application have the following advantages compared with the prior art: This application embodiment obtains the current step number and the step number to be corrected of the electronic expansion valve, determines the correction coefficient based on the overheating fluctuation of the indoor unit's inlet and outlet pipe temperatures, and then corrects the step number to be corrected according to the correction coefficient to obtain the adjustment step number. The opening of the electronic expansion valve is controlled according to the adjustment step number, which effectively reduces the over-adjustment amplitude caused by the temperature response lag of the indoor unit's inlet and outlet pipe temperatures. Reducing the adjustment step of the electronic expansion valve can alleviate over-adjustment, thereby reducing the temperature fluctuation amplitude caused by over-adjustment, improving the problem of overheating fluctuation of multiple indoor units, improving the operational stability and unit performance of the air conditioning system, and meeting the needs of energy conservation and emission reduction. Attached Figure Description The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A flowchart of an air conditioning control method provided in an embodiment of this application; Figure 2 A flowchart for determining the fluctuation coefficient is provided as an embodiment of this application; Figure 3 A flowchart for determining a time coefficient is provided as an embodiment of this application; Figure 4 A structural diagram of an air conditioning control device provided in an embodiment of this application; Figure 5 This is a structural diagram of an air conditioner provided in an embodiment of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] In current engineering practice, the indoor unit's inlet and outlet pipe temperatures are generally controlled indirectly by adjusting the superheat of the pipes. However, this control strategy suffers from significant response lag, easily leading to over-adjustment of the electronic expansion valve. This causes repeated fluctuations in temperature parameters, ultimately negatively impacting the overall operational stability and energy efficiency of the air conditioner. Therefore, this application provides an air conditioning control method, device, air conditioner, and storage medium. Based on changes in the superheat of the indoor unit's inlet and outlet pipe temperatures, a fluctuation coefficient is added to correct the number of steps of the throttling electronic expansion valve. By optimizing the throttling electronic expansion valve control method, the over-adjustment fluctuation amplitude caused by the lag in the change of the indoor unit's superheat with the electronic expansion valve is reduced, thereby reducing the temperature fluctuation amplitude caused by over-adjustment, increasing adjustment time control, ensuring adjustment speed, optimizing unit operating capacity, and improving unit performance and stability.

[0026] This application provides an air conditioning control method that can be applied to air conditioners, such as... Figure 1 As shown, it includes: Step S101: Obtain the current step number and the number of steps to be corrected for the electronic expansion valve in the air conditioner; In this embodiment, the electronic expansion valve can refer to a throttling electronic expansion valve installed in the refrigerant pipeline between the indoor and outdoor units of the air conditioner. By adjusting the opening degree of the electronic expansion valve (in this embodiment, the adjustment unit is steps), the refrigerant flow rate into the indoor unit evaporator can be controlled. Changes in flow rate directly affect the heat exchange efficiency of the indoor unit evaporator, thus affecting T. 进 and T 出 The corresponding changes are made to adjust the temperature of the indoor unit's inlet and outlet pipes, thereby controlling the overheating of the indoor unit's inlet and outlet pipes.

[0027] The current step number of the electronic expansion valve refers to the number of steps corresponding to the current opening degree of the electronic expansion valve during the operation of the air conditioner. The number of steps to be corrected is the basic number of steps determined according to the existing adjustment method of the air conditioning system and to be corrected in the manner described below.

[0028] In this step, the current opening degree of the electronic expansion valve can be collected in real time by the valve opening degree sensor of the air conditioning system, and the current opening degree can be converted into the current step number. Alternatively, the current step number can be obtained directly based on the historical adjustment record of the electronic expansion valve, and the number of steps to be corrected calculated based on the existing adjustment logic can be obtained.

[0029] Step S102: Obtain the fluctuation of the superheat of the indoor unit inlet and outlet pipe temperatures of the air conditioner in order to determine the correction coefficient; In this embodiment, the superheat of the indoor unit's inlet and outlet pipe temperatures refers to the difference between the outlet pipe temperature and the inlet pipe temperature, i.e., the indoor unit superheat T = T 出 -T 进 T 进 For indoor unit inlet pipe temperature, T 出 The indoor unit outlet pipe temperature fluctuation refers to the fluctuation of the indoor unit inlet and outlet pipe temperature superheat relative to the target superheat. The fluctuation includes the fluctuation amplitude and fluctuation duration. The fluctuation amplitude is the absolute value of the difference between the indoor unit inlet and outlet pipe temperature superheat and the target superheat. The fluctuation duration is the duration for which the indoor unit inlet and outlet pipe temperature superheat is within the preset fluctuation range. The correction coefficient is a parameter used to calculate the step correction amount. The correction amount is used to correct the number of steps to be corrected.

[0030] In this step, the superheat of the indoor unit's inlet and outlet pipe temperatures can be calculated by collecting the indoor unit's inlet and outlet pipe temperatures, and the fluctuation of the indoor unit's inlet and outlet pipe temperatures relative to the target superheat can be analyzed. Then, a correction coefficient can be determined based on the fluctuation.

[0031] Step S103: Determine the number of steps to be adjusted based on the correction coefficient, the number of steps to be corrected, and the current number of steps; In this embodiment of the application, the number of steps to be adjusted refers to the number of steps used to control the final opening degree of the electronic expansion valve.

[0032] In this step, the correction amount can be calculated based on the correction coefficient and the number of steps to be corrected, and then the number of steps to be adjusted can be calculated by combining the current number of steps.

[0033] Step S104: Control the opening degree of the electronic expansion valve in the air conditioner according to the number of steps to be adjusted.

[0034] The opening degree of an electronic expansion valve refers to the extent to which the valve is opened. It is related to the number of steps in the electronic expansion valve, and changes in the number of steps will directly change the valve opening degree.

[0035] In this step, the calculated number of steps to be adjusted can be sent as a control command to the electronic expansion valve, so that the valve is adjusted to the corresponding opening degree, thereby realizing the control of refrigerant flow.

[0036] This application embodiment obtains the current step number and the step number to be corrected of the electronic expansion valve, determines the correction coefficient based on the overheating fluctuation of the indoor unit's inlet and outlet pipe temperatures, and then corrects the step number to be corrected according to the correction coefficient to obtain the adjustment step number. The opening of the electronic expansion valve is controlled according to the adjustment step number, which effectively reduces the over-adjustment amplitude caused by the temperature response lag of the indoor unit's inlet and outlet pipe temperatures. Reducing the adjustment step of the electronic expansion valve can alleviate over-adjustment, thereby reducing the temperature fluctuation amplitude caused by over-adjustment, improving the problem of overheating fluctuation of multiple indoor units, improving the operational stability and unit performance of the air conditioning system, and meeting the needs of energy conservation and emission reduction.

[0037] In another embodiment of this application, step S102 obtains the fluctuation of the superheat of the indoor unit inlet and outlet pipe temperatures of the air conditioner in order to determine the correction coefficient, including: Step S201: Obtain the fluctuation range and fluctuation duration of the superheat of the indoor unit inlet and outlet pipe temperatures relative to the target superheat. In this embodiment of the application, the target superheat refers to the superheat reference value that enables the temperature of the inlet and outlet pipes of the indoor unit to reach the ideal control state. The target superheat is determined based on the superheat of the inlet and outlet pipe temperatures of the indoor unit that enables the temperature of the inlet and outlet pipes of the indoor unit to reach the target control temperature.

[0038] In this step, the temperature of the indoor unit's inlet and outlet pipes can be collected by a temperature detection device and the superheat can be calculated. The fluctuation range can be obtained by comparing the target superheat. At the same time, the time when the superheat is within the preset fluctuation range can be recorded to obtain the fluctuation duration.

[0039] Step S202: Determine the fluctuation coefficient based on the fluctuation amplitude; The fluctuation coefficient is a parameter set according to the fluctuation range between the superheat of the inlet and outlet pipes of the indoor unit and the target superheat. The value range is [0, 1], and it is used to adjust the adjustment step of the electronic expansion valve.

[0040] In this step, the current fluctuation amplitude can be matched to the corresponding range based on the preset correspondence between the fluctuation amplitude range and the fluctuation coefficient, thereby determining the corresponding fluctuation coefficient.

[0041] Step S203: Determine the time coefficient based on the fluctuation duration; The time coefficient is a parameter set according to the fluctuation duration of the superheat of the inlet and outlet pipes of the indoor unit, used to compensate for the change in adjustment speed caused by the adjustment of the fluctuation coefficient.

[0042] In this step, the current fluctuation duration can be matched to the corresponding range based on the preset correspondence between the fluctuation duration range and the time coefficient determination method, and the time coefficient can be calculated using the corresponding method.

[0043] Step S204: Determine the correction coefficient based on the fluctuation coefficient and the time coefficient.

[0044] In this step, the fluctuation coefficient and time coefficient can be integrated into a correction coefficient through specific calculations, providing a basis for the precise correction of the electronic expansion valve's adjustment steps. For example, the fluctuation coefficient of 0.6 can be multiplied by the time coefficient of 1.03 to obtain a correction coefficient of 0.6 × 1.03 ≈ 0.618.

[0045] This application embodiment obtains fluctuation-related parameters step by step, determines various coefficients, and finally calculates correction coefficients, so that the correction coefficients can comprehensively and accurately reflect the fluctuation of the indoor unit's overheating, effectively reduce the adjustment step of the electronic expansion valve, alleviate over-adjustment, suppress over-adjustment caused by temperature lag, and ensure adjustment speed.

[0046] In another embodiment of this application, step S201, obtaining the fluctuation range and duration of the superheat of the indoor unit inlet and outlet pipe temperatures of the air conditioner relative to the target superheat, includes: Step S301: The difference between the superheat of the indoor unit inlet and outlet pipe temperatures and the target superheat is determined as the fluctuation range; In this step, the difference between the superheat of the indoor unit's inlet and outlet pipe temperatures and the preset target superheat can be calculated, and then the absolute value can be taken to obtain the fluctuation range.

[0047] For example, by collecting the indoor unit's inlet pipe temperature of 17°C and outlet pipe temperature of 23°C using sensors, the superheat of the indoor unit's inlet and outlet pipe temperatures is calculated to be 6°C. The preset target superheat is 5°C. The difference of 1°C between the two can then be determined as the fluctuation range.

[0048] Step S302: Determine the duration for which the temperature superheat of the indoor unit's inlet and outlet pipes remains within a preset fluctuation range, so as to obtain the fluctuation duration.

[0049] The preset fluctuation range refers to the range of difference between the pre-set superheat of the indoor unit's inlet and outlet pipe temperatures and the target superheat, while the duration refers to the cumulative time during which the actual superheat is within the preset range.

[0050] In this step, the upper boundary N and lower boundary M of the preset fluctuation range can be obtained. When the temperature of the indoor unit's inlet and outlet pipes is detected to be overheated into this range, the timing starts and stops when the temperature is outside the range or when a specific condition is met. The timing result is the fluctuation duration.

[0051] This application embodiment clarifies the specific methods for determining the fluctuation amplitude and fluctuation duration, ensuring that the acquisition of relevant parameters has a unified standard and accuracy. This provides reliable data support for the subsequent calculation of fluctuation coefficient, time coefficient, and correction coefficient, which helps to improve the accuracy of electronic expansion valve adjustment, reduce indoor unit overheating fluctuations, and ensure the stable operation of the air conditioning system.

[0052] In another embodiment of this application, step S202, which determines the fluctuation coefficient based on the fluctuation amplitude, includes: Step S401: Among multiple preset fluctuation ranges, determine the target fluctuation range corresponding to the fluctuation range; The preset fluctuation range refers to the different intervals between the pre-defined superheat of the indoor unit's inlet and outlet pipe temperatures and the target superheat, while the target fluctuation range refers to the preset interval to which the actual fluctuation range belongs.

[0053] In this step, the multiple fluctuation ranges are first clearly defined, and then the actual calculated fluctuation range is compared with each preset range to determine the specific interval to which it belongs.

[0054] Step S402: In the preset correspondence between fluctuation range and fluctuation reference coefficient, the fluctuation reference coefficient corresponding to the target fluctuation range is determined as the fluctuation coefficient.

[0055] The fluctuation reference coefficient refers to the coefficient that is set in advance for each fluctuation range to adjust the adjustment step of the electronic expansion valve. The correspondence means that each preset fluctuation range has a unique matching fluctuation reference coefficient. The fluctuation coefficient is one of the core parameters used to calculate the correction coefficient.

[0056] In this step, the fluctuation reference coefficient corresponding to the target fluctuation range is first determined from the preset fluctuation range and fluctuation reference coefficient, and this fluctuation reference coefficient is used as the fluctuation coefficient.

[0057] This application embodiment establishes clear rules for determining the fluctuation coefficient by presetting the fluctuation range and corresponding fluctuation reference coefficient. It can quickly and accurately determine the fluctuation coefficient based on the actual fluctuation range, providing key parameter support for the calculation of the correction coefficient. It achieves the purpose of dynamically adjusting the adjustment step of the electronic expansion valve according to the superheat fluctuation, reducing the over-adjustment range and improving the adjustment accuracy and stability of the air conditioning system.

[0058] In another embodiment of this application, step S203, which determines the time coefficient based on the fluctuation duration, includes: Step S501: Among multiple preset fluctuation duration ranges, determine the target fluctuation duration range corresponding to the fluctuation duration; The preset fluctuation duration range refers to the time interval during which the temperature superheat of the indoor unit's inlet and outlet pipes is in a specific fluctuation state, while the target fluctuation duration range refers to the preset interval to which the actual fluctuation duration belongs.

[0059] In this step, the multiple fluctuation duration ranges and their corresponding boundary conditions are first clearly defined, and then the actual recorded fluctuation duration is compared with the boundaries of each range to determine the interval to which it belongs.

[0060] Step S502: In the preset correspondence between fluctuation duration range and time coefficient determination method, the time coefficient determination method corresponding to the target fluctuation duration range is determined as the target time coefficient determination method; The time coefficient determination method refers to the calculation rules for the time coefficient that are pre-set for each fluctuation duration range. The correspondence means that each preset fluctuation duration range is matched with a unique time coefficient determination method. The target time coefficient determination method refers to the calculation rules corresponding to the actual fluctuation duration range.

[0061] In this step, the corresponding rules for determining the time coefficient can be clarified first, and then the corresponding time coefficient determination method can be extracted based on the determined target fluctuation duration range.

[0062] Step S503: Calculate the time coefficient according to the target time coefficient determination method.

[0063] The time coefficient is a parameter used to compensate for the speed adjustment of the electronic expansion valve, and its calculation must be based on the method for determining the target time coefficient.

[0064] In this step, the target time coefficient can be determined by substituting the relevant known parameters into the formula and performing calculations. For example, if the target time coefficient is determined by the formula ks=ti / t0, the actual fluctuation duration ti=65 seconds, and the target adjustment time 0=48 seconds, substituting the parameters into the formula yields a time coefficient ks=65 / 48≈1.35.

[0065] This application embodiment establishes a scientific time coefficient calculation logic by pre-setting the fluctuation duration range and the corresponding time coefficient determination method. It can accurately calculate the time coefficient based on the actual fluctuation duration, effectively compensating for the problem of reduced adjustment speed caused by fluctuation coefficient adjustment. While reducing the over-adjustment amplitude, it ensures adjustment efficiency and improves the overall operating performance of the air conditioning system.

[0066] In another embodiment of this application, step S204, determining the correction coefficient based on the fluctuation coefficient and the time coefficient, includes: Step S601: Calculate the product of the fluctuation coefficient and the time coefficient; In this step, the fluctuation coefficient, which reflects the impact of fluctuation amplitude, and the time coefficient, which reflects the impact of fluctuation duration, can be integrated through mathematical multiplication to obtain a comprehensive value.

[0067] For example, assuming the volatility coefficient is 0.55 and the time coefficient is 1.15, according to the multiplication rule, we can calculate 0.55 × 1.15 = 0.6325.

[0068] Step S602: Determine the product as the correction coefficient.

[0069] In this step, the product of the fluctuation coefficient and the time coefficient is directly set as the correction coefficient, so that the correction coefficient can comprehensively reflect the influence of fluctuation amplitude and fluctuation duration on the electronic expansion valve regulation.

[0070] The embodiments of this application determine the correction coefficient through simple and efficient multiplication operations. This comprehensively considers the dual impact of the fluctuation amplitude and duration of the indoor unit's superheat on the adjustment process, while ensuring the convenience and accuracy of the correction coefficient calculation. This provides a reliable basis for the precise adjustment of the electronic expansion valve, helps to reduce the over-adjustment amplitude, ensure the adjustment speed, and improve the operational stability and energy efficiency of the air conditioning system.

[0071] In another embodiment of this application, step S104 determines the number of steps to be adjusted based on the correction coefficient, the number of steps to be corrected, and the current number of steps, including: Step S701: Determine the step correction amount based on the number of steps to be corrected and the correction coefficient; In this embodiment, the step correction amount is the product of the number of steps to be corrected and the correction coefficient.

[0072] In this step, the correction coefficient is multiplied by the number of steps to be corrected using mathematical multiplication to obtain the step correction amount that can adapt to the current working conditions. Given that the number of steps to be corrected is 75 and the correction coefficient is 0.85, according to the multiplication rules, the step correction amount can be calculated as 75 × 0.85 = 63.75 steps. In practical applications, it can be rounded down to 64 steps.

[0073] Step S702: The current step number is corrected using the step correction amount to obtain the step number to be adjusted.

[0074] In this step, based on the current step number, the calculated step correction amount is added to or subtracted from the current step number to obtain the target step number to which the electronic expansion valve needs to be adjusted. For example, if the current step number of the electronic expansion valve is 380 steps, the step correction amount of 64 steps is added to the current step number of 380 steps, resulting in an adjustment step number of 444 steps.

[0075] In other words, the number of steps to be adjusted = the current number of steps + the number of steps to be corrected * the correction coefficient.

[0076] This application embodiment determines the step correction amount by multiplying the number of steps to be corrected by the correction coefficient, and then combines it with the current number of steps to obtain the number of steps to be adjusted. This allows the adjustment steps of the electronic expansion valve to accurately adapt to the fluctuation of the indoor unit's overheating, effectively reducing the over-adjustment amplitude caused by temperature response lag, while ensuring the timeliness and accuracy of the adjustment, improving the adjustment precision and operational stability of the air conditioning system, and helping to optimize unit performance.

[0077] For ease of understanding, this application also provides an embodiment in practical application, as follows: Within the first preset time tc after the air conditioning is running in cooling mode, the unit starts up, or the protection shutdown is completed, or within tc when the unit load changes by more than X%, let kb=1, ks=1, K=1; During air conditioning cooling operation, after the unit starts up and stops due to protection, and after the first preset time tc, or when the unit load change is less than X%, or after the first preset time tc when the unit load change is greater than X%, the indoor unit electronic expansion valve optimization flag is set to "1", and the control is as follows: 1) Target adjustment time confirmation stage. In this stage, let kb=1, ks=1, K=1.

[0078] The timing starts when |T-Ta|≥M and continues until the duration tm is |T-Ta|≤N. The timing ends then, and tm is recorded as t1. The second test starts timing from |T-Ta|≥M and continues until the duration tm is |T-Ta|≤N, at which point the timing ends and tm is recorded as t2; The third test starts timing from |T-Ta|≥M and continues until the duration tm is |T-Ta|≤N, at which point the timing ends and tm is recorded as t3; Target adjustment time: Take the average of the adjustment times of the first 3 groups, t0 = (t1 + t2 + t3) / 3.

[0079] Where Ta is the target superheat, M is the deviation from the target superheat value when entering regulation, and N is the deviation from the target superheat value when exiting regulation. These values ​​may vary depending on the indoor unit capacity, indoor unit type, heat exchanger size, and electronic expansion valve flow rate. In actual engineering, the heat exchanger situation is determined according to the indoor unit series and DIP switches, and the corresponding series value can be given in the logic. tm is the target regulation time. Subsequent regulation will correct the coefficient based on the actual time and the target time to ensure that the regulation time is less than tm. This time is given based on the average value of 3 cycles (not limited to 3 cycles).

[0080] 2) Indoor unit electronic expansion valve step optimization adjustment stage ① Determine the volatility coefficient kb. The process for determining the volatility coefficient can be as follows: Figure 2 As shown.

[0081] Air conditioning systems have an optimal superheat based on different heat exchange methods. The closer the actual superheat of the indoor unit is to the optimal superheat, the better the unit's performance. However, factors such as ambient temperature and fan speed can cause variations in the indoor unit's superheat, requiring adjustment of the electronic expansion valve. But the pipe / superheat temperature changes with the electronic expansion valve, exhibiting a lag and prone to over-adjustment oscillations. Therefore, during adjustment, reducing the adjustment step of the electronic expansion valve as it approaches the target superheat range can mitigate over-adjustment. Thus, when the deviation between the indoor unit's pipe temperature superheat and the target superheat falls within different fluctuation ranges, the corresponding fluctuation coefficients are as follows: 0 < |T-Ta| ≤ A, kb = a A < |T-Ta| ≤ B, kb = b B < |T-Ta|, kb = 1 Where a < b < 1, the fluctuation coefficient kb takes the value [0, 1], 0 < A < B, A, B, a and b are all fixed values, and the values ​​of A, B, a and b can be different depending on the indoor unit capacity, indoor unit type, heat exchanger size and electronic expansion valve flow rate. In actual engineering, the heat exchanger situation is determined according to the indoor unit series and DIP switch, and the corresponding series value can be given in the logic.

[0082] The fluctuation range is mainly determined by the size of the heat exchanger, the branching method, and the flow rate of the electronic expansion valve. Different indoor units may have different parameters. For example, for some indoor units, a 1 PLs change in the opening of the electronic expansion valve has a significant impact on the superheat. Therefore, for such indoor units, the width of each fluctuation range is wider. On the other hand, for indoor units where the superheat may change less when the adjustment is more than 10 PLs, the width of each superheat adjustment range is narrower. The indoor unit model can be identified by the jumper cap and DIP switch, and the heat exchanger and flow valve can be matched accordingly. Based on the actual development and testing patterns, the adjustment range of different indoor units is given.

[0083] ② Determine the time coefficient ks. The process for determining the time coefficient can be as follows: Figure 3 As shown.

[0084] Because reducing over-adjustment and correcting the adjustment step of the indoor unit's electronic expansion valve may affect the adjustment rate, an adjustment time correction is added to optimize the adjustment coefficient. Therefore, when the system detects a deviation |T-Ta| > M between the indoor unit's superheat and the target superheat, timing begins and continues until a duration of tm during which the deviation |T-Ta| < N is detected, denoted as the adjustment time t. i (i takes the values ​​1, 2, 3, ..., n), and the accumulated time is cleared after recording until the next time the condition is met. When the control is first activated upon power-on or when the function is active but the timing condition is not met, ks=1. The value of ks is updated after the condition is met and a complete recording cycle is completed. If ti < t0, then ks maintains its current value; If t0 ≤ ti < tn, then ks = t i / t0; If the exit condition is not met after a duration of tn following the fulfillment of the entry condition, the timer is forcibly terminated, and ks = tn / t0.

[0085] Where t0 is the target settling time and tn is a constant, which varies for different air conditioning systems; After determining the volatility coefficient kb and the time coefficient ks, the correction coefficient K can be calculated using the following formula: K = kb * ks The number of steps for the indoor unit's electronic expansion valve, P = current step number + ΔP (adjustment amount of the indoor unit's electronic expansion valve). Wherein, △P indoor unit electronic expansion valve adjustment amount = number of steps of target indoor unit electronic expansion valve adjustment amount before correction * K, where K is the correction coefficient of indoor unit electronic expansion valve. The target indoor unit electronic expansion valve adjustment amount is confirmed according to the current adjustment method of the air conditioning system, and this part will not be elaborated in detail.

[0086] The purpose of this application is to intervene in the main control architecture before oscillations occur, thereby avoiding oscillations caused by adjustment lag and optimizing adjustment time.

[0087] In another embodiment of this application, an air conditioning control device is also provided, such as... Figure 4 As shown, it includes: The first acquisition module 11 is used to acquire the current step number and the number of steps to be corrected of the electronic expansion valve in the air conditioner; The second acquisition module 12 is used to acquire the fluctuation of the overheating of the indoor unit inlet and outlet pipe temperatures of the air conditioner in order to determine the correction coefficient. The determining module 13 is used to determine the number of steps to be adjusted based on the correction coefficient, the number of steps to be corrected, and the current number of steps. The control module 14 is used to control the opening degree of the electronic expansion valve in the air conditioner according to the number of adjustment steps.

[0088] Optionally, the second acquisition module includes: The first acquisition unit is used to acquire the fluctuation range and fluctuation duration of the superheat of the indoor unit inlet and outlet pipe temperature relative to the target superheat. The target superheat is determined based on the superheat of the indoor unit inlet and outlet pipe temperature that enables the indoor unit inlet and outlet pipe temperature to reach the target control temperature. The first determining unit is used to determine the fluctuation coefficient based on the fluctuation amplitude. The second determining unit is used to determine the time coefficient based on the fluctuation duration; The third determining unit is used to determine the correction coefficient based on the fluctuation coefficient and the time coefficient.

[0089] Optionally, the first acquisition unit includes: The fourth determining unit is used to determine the difference between the superheat of the indoor unit inlet and outlet pipe temperature and the target superheat as the fluctuation range; The fifth determining unit is used to determine the duration for which the overheating of the indoor unit's inlet and outlet pipe temperatures remains within a preset fluctuation range, so as to obtain the fluctuation duration.

[0090] Optionally, the first determining unit is further configured to: Among multiple preset fluctuation ranges, a target fluctuation range corresponding to the fluctuation range is determined; In the preset correspondence between fluctuation range and fluctuation reference coefficient, the fluctuation reference coefficient corresponding to the target fluctuation range is determined as the fluctuation coefficient.

[0091] Optionally, the second determining unit is further configured to: Among multiple preset fluctuation duration ranges, a target fluctuation duration range corresponding to the fluctuation duration is determined; In the preset correspondence between fluctuation duration range and time coefficient determination method, the time coefficient determination method corresponding to the target fluctuation duration range is determined as the target time coefficient determination method; Calculate the time coefficient according to the method for determining the target time coefficient.

[0092] Optionally, the third determining unit is also used for: Calculate the product of the fluctuation coefficient and the time coefficient; The product is determined as the correction coefficient.

[0093] Optionally, the determining module includes: The sixth determining unit is used to determine the step correction amount based on the number of steps to be corrected and the correction coefficient; The correction unit is used to correct the current step number using the step correction amount to obtain the step number to be adjusted.

[0094] In another embodiment of this application, an air conditioner is also provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus. Memory, used to store computer programs; The processor, when executing a program stored in memory, implements the air conditioning control method described in any of the foregoing method embodiments.

[0095] The air conditioner provided in this embodiment of the invention uses a processor to execute a program stored in a memory to obtain the current step number and the number of steps to be corrected for the electronic expansion valve. It then determines a correction coefficient based on the overheating fluctuations of the indoor unit's inlet and outlet pipe temperatures. The processor then corrects the number of steps to be corrected according to the correction coefficient to obtain the number of steps to be adjusted. The opening of the electronic expansion valve is controlled according to the number of steps to be adjusted. This effectively reduces the over-adjustment amplitude caused by temperature response lag in the indoor unit's inlet and outlet pipe temperatures. Reducing the adjustment step of the electronic expansion valve can mitigate over-adjustment, thereby reducing the temperature fluctuation amplitude caused by over-adjustment. This improves the problem of overheating fluctuations in multiple indoor units, enhances the operational stability and unit performance of the air conditioning system, and meets the requirements of energy conservation and emission reduction.

[0096] The communication bus 1140 mentioned above in the air conditioner can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus 1140 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0097] Communication interface 1120 is used for communication between the air conditioner and other devices.

[0098] The memory 1130 may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0099] The processor 1110 mentioned above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0100] In another embodiment of this application, a computer-readable storage medium is also provided, on which a program for an air conditioning control method is stored, wherein when the program for the air conditioning control method is executed by a processor, the steps of the air conditioning control method described in any of the foregoing method embodiments are implemented.

[0101] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0102] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An air conditioning control method, characterized in that, include: Obtain the current step number and the number of steps to be corrected for the electronic expansion valve in the air conditioner; To determine the correction factor, the fluctuation of the superheat of the indoor unit's inlet and outlet pipe temperatures is obtained. The number of steps to be adjusted is determined based on the correction coefficient, the number of steps to be corrected, and the current number of steps. The opening degree of the electronic expansion valve in the air conditioner is controlled according to the number of adjustment steps.

2. The air conditioning control method according to claim 1, characterized in that, To determine the correction factor, the fluctuation of the superheat of the indoor unit's inlet and outlet pipe temperatures is obtained, including: The fluctuation range and duration of the superheat of the indoor unit inlet and outlet pipe temperatures relative to the target superheat are obtained. The target superheat is determined based on the indoor unit inlet and outlet pipe temperature superheat that enables the indoor unit inlet and outlet pipe temperatures to reach the target control temperature. The fluctuation coefficient is determined based on the fluctuation amplitude. The time coefficient is determined based on the duration of the fluctuation. The correction coefficient is determined based on the fluctuation coefficient and the time coefficient.

3. The air conditioning control method according to claim 2, characterized in that, Obtain the fluctuation range and duration of the superheat of the indoor unit's inlet and outlet pipe temperatures relative to the target superheat, including: The difference between the superheat of the indoor unit inlet and outlet pipe temperatures and the target superheat is determined as the fluctuation range; The duration for which the overheating of the indoor unit's inlet and outlet pipe temperatures remains within a preset fluctuation range is determined to obtain the fluctuation duration.

4. The air conditioning control method according to claim 2, characterized in that, Determining the fluctuation coefficient based on the fluctuation amplitude includes: Among multiple preset fluctuation ranges, a target fluctuation range corresponding to the fluctuation range is determined; In the preset correspondence between fluctuation range and fluctuation reference coefficient, the fluctuation reference coefficient corresponding to the target fluctuation range is determined as the fluctuation coefficient.

5. The air conditioning control method according to claim 2, characterized in that, Determining the time coefficient based on the fluctuation duration includes: Among multiple preset fluctuation duration ranges, a target fluctuation duration range corresponding to the fluctuation duration is determined; In the preset correspondence between fluctuation duration range and time coefficient determination method, the time coefficient determination method corresponding to the target fluctuation duration range is determined as the target time coefficient determination method; Calculate the time coefficient according to the method for determining the target time coefficient.

6. The air conditioning control method according to claim 2, characterized in that, Determining the correction coefficient based on the fluctuation coefficient and the time coefficient includes: Calculate the product of the fluctuation coefficient and the time coefficient; The product is determined as the correction coefficient.

7. The air conditioning control method according to claim 1, characterized in that, Determining the number of steps to be adjusted based on the correction coefficient, the number of steps to be corrected, and the current step number includes: The step correction amount is determined based on the number of steps to be corrected and the correction coefficient; The current step number is corrected using the step correction amount to obtain the step number to be adjusted.

8. An air conditioning control device, characterized in that, include: The first acquisition module is used to acquire the current step number and the number of steps to be corrected of the electronic expansion valve in the air conditioner; The second acquisition module is used to acquire the fluctuation of the superheat of the indoor unit inlet and outlet pipe temperatures of the air conditioner in order to determine the correction coefficient. The determining module is used to determine the number of steps to be adjusted based on the correction coefficient, the number of steps to be corrected, and the current number of steps. The control module is used to control the opening degree of the electronic expansion valve in the air conditioner according to the number of adjustment steps.

9. An air conditioner, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; The processor, when executing a program stored in the memory, implements the air conditioning control method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program for an air conditioning control method, which, when executed by a processor, implements the steps of the air conditioning control method according to any one of claims 1-7.

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