Expansion valve shunting control method, device and equipment and storage medium

Abstract

The invention discloses an expansion valve shunting control method, device and equipment and a storage medium, relates to the technical field of vehicle air conditioning system control, and discloses the expansion valve shunting control method. Comprising the steps that the current refrigeration mode, the preset fixed opening degree, the battery cooling loop expansion valve opening degree, the front row expansion valve opening degree, the front air blower air volume, the rear air blower air volume and the air blower air volume of the vehicle are obtained, and the current refrigeration mode comprises the front row refrigeration mode, the rear row refrigeration mode and the battery cooling loop cooling mode; a target shunting strategy is determined according to at least three items of the current refrigeration mode, the preset fixed opening degree, the battery cooling loop expansion valve opening degree, the front row expansion valve opening degree, the front air blower air volume, the rear air blower air volume and the air blower air volume; and the expansion valve opening is controlled according to the target shunting strategy, and expansion valve shunting control is completed. By determining the target shunting strategy, accurate shunting control over the multi-loop expansion valve is achieved, and the refrigeration efficiency and stability are improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle air conditioning system control technology, and in particular to an expansion valve shunt control method, device, equipment and storage medium. Background Art

[0002] As automotive air conditioning systems gradually develop towards multi-circuit cooling modes, multi-zone coordinated control of the front, rear and battery cooling circuits of the vehicle has become the key to achieving efficient cooling. However, due to the dynamic changes in cooling demand and operating parameters of each zone, such as the heat load of the front and rear passenger compartments, fluctuations in battery temperature and changes in blower air volume, current expansion valve control methods often find it difficult to meet the needs of multiple zones at the same time. Traditional fixed parameter control methods usually rely on a single variable or a preset threshold to adjust the opening of the expansion valve, and lack the ability to respond in real time to the complexity of multi-circuit operating conditions.

[0003] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of this application is to provide an expansion valve diversion control method, device, equipment and storage medium, aiming to solve the technical problem that the traditional expansion valve control method cannot optimize the diversion strategy based on multiple variables in real time, resulting in inaccurate refrigerant flow distribution when multiple circuits work together, thereby affecting the system operation efficiency and stability.

[0005] To achieve the above object, the present application proposes an expansion valve split flow control method, the method comprising: Obtaining a current cooling mode of the vehicle, a preset fixed opening, a battery cooling circuit expansion valve opening, a front row expansion valve opening, a front blower air volume, a rear blower air volume, and a blower air volume, wherein the current cooling mode includes a front row cooling mode, a rear row cooling mode, and a cooling mode of the battery cooling circuit; determining a target flow diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume; The expansion valve opening is controlled according to the target diversion strategy to complete the expansion valve diversion control.

[0006] In one embodiment, the step of determining the target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume comprises: Get the current battery temperature and preset battery safety value; Setting the front row expansion valve to a regulating cooling mode according to the front row cooling mode and the cooling mode of the battery cooling circuit to obtain a target degree of supercooling; Obtaining a target front expansion valve opening according to the current battery temperature, the preset battery safety value, the preset fixed opening, the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume, and the blower air volume; A target diversion strategy is determined according to the target front-row expansion valve opening and the target subcooling degree.

[0007] In one embodiment, the step of obtaining a target front expansion valve opening according to the current battery temperature, the preset battery safety value, the preset fixed opening, the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume, and the blower air volume comprises: When the current battery temperature exceeds the preset battery safety value, the preset fixed opening is used as the target front-row expansion valve opening; When the current battery temperature does not exceed the preset battery safety value, the target front expansion valve opening is determined according to the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume and the blower air volume.

[0008] In one embodiment, when the current battery temperature does not exceed the preset battery safety value, the step of determining the target front expansion valve opening according to the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume, and the blower air volume comprises: When the current battery temperature does not exceed the preset battery safety value, obtaining the current position, preset opening value, first air volume threshold, second air volume threshold, first front row preset opening, second front row preset opening and third front row preset opening of the current battery cooling circuit expansion valve; When the battery cooling circuit expansion valve opening is greater than the front-row expansion valve opening, taking the current position as the first front-row expansion valve opening; When the battery cooling circuit expansion valve opening is less than or equal to the front-row expansion valve opening, the preset opening value is used as the first front-row expansion valve opening; When the air volume of the front blower is greater than a first air volume threshold, the first front row preset opening is used as the second front row expansion valve opening; When the air volume of the blower is less than a second air volume threshold, using the second front row preset opening as the second front row expansion valve opening; When the air volume of the front blower is less than or equal to the first air volume threshold and the air volume of the blower is greater than or equal to the second air volume threshold, the third front row preset opening is used as the second front row expansion valve opening; The first front-row expansion valve opening or the second front-row expansion valve opening is used as a target front-row expansion valve opening according to a preset opening determination strategy.

[0009] In one embodiment, the step of determining the target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume further includes: Obtaining a first rear row preset opening, a second rear row preset opening, and a third rear row preset opening; Obtaining a preset mixed opening degree according to the front row cooling mode and the rear row cooling mode; When the air volume of the front blower is greater than a first air volume threshold, taking the first rear row preset opening as a target rear row expansion valve opening; When the blower air volume is less than a second air volume threshold, taking the second rear row preset opening as the target rear row expansion valve opening; When the air volume of the front blower is less than or equal to the first air volume threshold and the air volume of the blower is greater than or equal to the second air volume threshold, the third rear row preset opening is used as the target rear row expansion valve opening; Using the preset mixed opening as the front expansion valve opening, and using the target rear expansion valve opening as the rear expansion valve opening; A target flow diversion strategy is determined according to the opening of the front expansion valve and the opening of the rear expansion valve.

[0010] In one embodiment, the step of determining the target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume further includes: obtaining a target evaporation temperature according to the rear row cooling mode and the cooling mode of the battery cooling circuit; When the current battery temperature exceeds the preset battery safety value, the preset fixed opening is used as the target rear expansion valve opening; When the current battery temperature does not exceed the preset battery safety value, determining a target rear expansion valve opening according to the battery cooling circuit expansion valve opening, the rear expansion valve opening, the rear blower air volume, and the blower air volume; A target diversion strategy is determined according to the target rear-row expansion valve opening and the target evaporation temperature.

[0011] In one embodiment, when the current battery temperature does not exceed the preset battery safety value, the step of determining the target rear expansion valve opening according to the battery cooling circuit expansion valve opening, the rear expansion valve opening, the rear blower air volume, and the blower air volume comprises: When the current battery temperature does not exceed the preset battery safety value, obtaining the current position of the current battery cooling circuit expansion valve, the preset rear row opening value, the first rear row preset opening, the second rear row preset opening, and the third rear row preset opening; When the battery cooling circuit expansion valve opening is greater than the rear-row expansion valve opening, the current position is used as the first rear-row expansion valve opening; When the battery cooling circuit expansion valve opening is less than or equal to the rear-row expansion valve opening, the preset rear-row opening value is used as the first rear-row expansion valve opening; When the air volume of the rear blower is greater than a first air volume threshold, the first rear row preset opening is used as the second rear row expansion valve opening; When the air volume of the blower is less than a second air volume threshold, the second rear row preset opening is used as the second rear row expansion valve opening; When the air volume of the rear blower is less than or equal to the first air volume threshold and the air volume of the blower is greater than or equal to the second air volume threshold, using the third rear row preset opening as the second rear row expansion valve opening; The first rear-row expansion valve opening or the second rear-row expansion valve opening is used as a target rear-row expansion valve opening according to a preset opening determination strategy.

[0012] In addition, to achieve the above-mentioned purpose, the present application also proposes an expansion valve shunt control device, the expansion valve shunt control device comprising: an acquisition module, used to acquire the current cooling mode of the vehicle, a preset fixed opening, the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume, the rear blower air volume and the blower air volume, the current cooling mode comprising the front cooling mode, the rear cooling mode and the battery cooling circuit cooling mode; a determination module, configured to determine a target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume; The control module is used to control the expansion valve opening according to the target diversion strategy to complete the expansion valve diversion control.

[0013] In addition, to achieve the above-mentioned purpose, the present application also proposes an expansion valve shunt control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the expansion valve shunt control method as described above.

[0014] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the expansion valve diversion control method described above are implemented.

[0015] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the expansion valve diversion control method described above are implemented.

[0016] One or more technical solutions proposed in this application have at least the following technical effects: By obtaining multiple key operating data such as the current cooling mode, expansion valve opening parameters, and blower air volume, the system comprehensively analyzes these data and dynamically determines the target diversion strategy, solving the problem of inaccurate refrigerant flow distribution caused by single variable control in existing technologies. Compared with existing technologies, this solution can not only adapt to the dynamic needs of the front row, rear row, and battery cooling circuits in real time through multi-parameter coordinated control, but also realizes the precise distribution of refrigerant diversion between multiple circuits, thereby significantly improving the operating efficiency and stability of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A flow chart of the expansion valve flow control method according to the present invention; Figure 2 A schematic diagram of a thermal management system provided in Example 1 of the expansion valve flow diversion control method of the present application; Figure 3 A flow chart of the second embodiment of the expansion valve flow control method of the present application; Figure 4 This is a schematic diagram of the module structure of the expansion valve flow diversion control device according to an embodiment of the present application; Figure 5 Schematic diagram of the equipment structure of the hardware operating environment involved in the expansion valve shunt control method in the embodiment of the present application.

[0020] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0022] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The main solution of the embodiment of the present application is: obtaining the current cooling mode of the vehicle, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume and the blower air volume, wherein the current cooling mode includes the front row cooling mode, the rear row cooling mode and the cooling mode of the battery cooling circuit; determining a target flow diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume; The expansion valve opening is controlled according to the target diversion strategy to complete the expansion valve diversion control.

[0024] In this embodiment, for the convenience of description, the following description is made by taking the identification of the expansion valve shunt control device as the execution subject.

[0025] Since the conventional expansion valve control method in the prior art cannot optimize the diversion strategy based on multiple variables in real time, the refrigerant flow distribution is not accurate when multiple circuits work together, thus affecting the system's operating efficiency and stability. This application provides a solution that obtains multiple key operating data such as the current refrigeration mode, expansion valve opening parameters, and blower air volume, comprehensively analyzes these data, and dynamically determines the target diversion strategy, solving the problem of inaccurate refrigerant flow distribution caused by single variable control in the prior art. Compared with the prior art, this solution can not only adapt to the dynamic needs of the front row, rear row, and battery cooling circuits in real time through multi-parameter collaborative control, but also realizes the accurate distribution of refrigerant diversion between multiple circuits, thereby significantly improving the operating efficiency and stability of the air-conditioning system.

[0026] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, an expansion valve shunt control device, etc. The following takes the expansion valve shunt control device as an example to illustrate this embodiment and the following embodiments.

[0027] Based on this, the embodiment of the present application provides an expansion valve split flow control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the expansion valve diversion control method of the present application.

[0028] In this embodiment, the expansion valve flow splitting control method includes steps S10 to S30: Step S10, obtaining the current cooling mode of the vehicle, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume and the blower air volume, wherein the current cooling mode includes the front row cooling mode, the rear row cooling mode and the battery cooling circuit cooling mode; It should be noted that the current cooling mode refers to the operating status of the vehicle, including the front cooling mode, rear cooling mode and battery cooling circuit cooling mode, which is used to identify the cooling requirements of different circuits. By judging the cooling mode, it is possible to identify the areas that need to be allocated refrigerant first, ensuring the reasonable diversion of the refrigerant.

[0029] It is understandable that the preset fixed opening refers to the fixed expansion valve opening value set for different circuits and working conditions, which serves as the initial opening parameter to ensure the supply of basic refrigerant flow. The battery cooling circuit expansion valve opening indicates the actual opening value of the expansion valve of the current battery cooling circuit, reflecting the current demand and operating status of the battery cooling system. The front row expansion valve opening indicates the current opening value of the expansion valve of the front passenger compartment, indicating the actual cooling demand of the front passenger compartment. The front blower air volume indicates the air volume information of the front row blower obtained through the sensor, which is used to judge the current front row cooling capacity demand and air circulation conditions. The rear blower air volume indicates the air volume information of the rear row blower obtained through the sensor, which is used to judge the rear row cooling demand. The blower air volume indicates the total blower air volume, which is used to calculate the comprehensive air volume demand and optimize the diversion strategy of the expansion valve.

[0030] This embodiment can be applied to a thermal management system. Figure 2 , Figure 2 Schematic diagram of a thermal management system according to a first embodiment of the expansion valve flow diversion control method of the present application.

[0031] like Figure 2 As shown in the figure, the thermal management system includes an external heat exchanger, a compressor, a four-way valve, a liquid reservoir, front and rear air conditioning fans, front and rear knee pulse valves and a battery cooling circuit. The refrigerant flow direction is controlled by switching between the compressor and the four-way valve for cooling or heating. The external heat exchanger releases the heat of the refrigerant, and the internal heat exchanger provides heating and cooling for the passenger compartment. The battery cooling circuit regulates the fluid flow through the battery cooling pulse valve to ensure the temperature safety of the battery pack. The overall front and rear compartment temperature control and battery thermal management are realized to meet the comfort and safety requirements.

[0032] Step S20, determining a target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume; It is understandable that the refrigeration area that needs to be responded to first is determined based on the obtained refrigeration mode, that is, the front row refrigeration mode, the rear row refrigeration mode, and the cooling mode of the battery cooling circuit. For example, in the battery cooling priority mode, the opening of the battery cooling circuit expansion valve is adjusted first. The refrigerant flow is dynamically allocated between the front row, rear row and battery cooling circuits according to priority and real-time operating conditions. If the battery cooling demand is responded to first, the opening of the front and rear row expansion valves is limited, and the opening of the battery cooling circuit expansion valve is increased. If it is in the balanced demand mode, the refrigerant flow is allocated proportionally according to the actual load of each circuit.

[0033] In a feasible implementation, step S20 may include steps A21 to A24: Step A21, obtaining the current battery temperature and a preset battery safety value; It should be noted that the current battery temperature refers to the current temperature of the battery in the battery cooling circuit collected in real time by the sensor, which reflects the thermal load of the battery and is the core basis for judging whether the battery needs to be cooled first. The preset battery safety value refers to the preset upper limit threshold of the battery temperature. When the battery temperature exceeds this value, the refrigerant needs to be allocated first to protect the battery safety.

[0034] Step A22, setting the front row expansion valve to a regulating cooling mode according to the front row cooling mode and the cooling mode of the battery cooling circuit to obtain a target supercooling degree; It should be noted that the front row cooling mode refers to the operating mode in the vehicle air conditioning system that provides cooling for the front row passengers. In this mode, the comfort needs of the front row passengers must be met first. The battery cooling circuit cooling mode refers to an exclusive mode that provides cooling for the battery. In this mode, the battery temperature must be maintained within a safe range. The target supercooling refers to the target value of the supercooling state before the refrigerant enters the evaporator. It is used to ensure that the evaporator can efficiently exchange heat and is an important parameter for adjusting the expansion valve.

[0035] It is understandable that the current system operating state determines whether the front row is in cooling mode and whether the battery cooling circuit needs cooling. When the front row is in cooling mode, the controller sets the front row expansion valve to the adjustment state and determines the target subcooling by calculating the difference between the refrigerant liquid temperature and the saturation temperature to guide the cooling adjustment of the front row expansion valve.

[0036] Step A23, obtaining a target front expansion valve opening according to the current battery temperature, the preset battery safety value, the preset fixed opening, the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume, and the blower air volume; It is understandable that the priority of battery cooling and front row cooling is analyzed by combining the difference between the current battery temperature and the preset battery safety value, the preset fixed opening in the system, the battery cooling circuit expansion valve opening and the front row expansion valve opening. Furthermore, according to the front blower air volume and the total blower air volume, the target front row expansion valve opening is dynamically calculated to balance the comfort of the front row passengers and the safety of battery cooling.

[0037] In a feasible implementation, step A23 may include steps A231-A232: Step A231, when the current battery temperature exceeds the preset battery safety value, taking the preset fixed opening as the target front-row expansion valve opening; It is understandable that when the current battery temperature exceeds the preset battery safety value, the battery cooling priority mode will be entered. At this time, in order to ensure that the refrigerant is allocated to the battery cooling circuit first, the controller sets the opening of the front expansion valve to a preset fixed opening, reducing the supply of refrigerant flow to the front row, thereby ensuring the battery cooling demand.

[0038] It should be noted that the preset battery safety value is the upper limit of the battery safe operating temperature, such as 50°C. If the value is exceeded, the battery needs to be protected first. The preset fixed opening represents the basic expansion valve opening value, such as 10%, which is used to ensure the basic flow supply of the refrigerant.

[0039] Step A232, when the current battery temperature does not exceed the preset battery safety value, determine the target front expansion valve opening according to the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume and the blower air volume.

[0040] It is understandable that when the current battery temperature does not exceed the preset battery safety value, the priority of the battery cooling demand is reduced, and other parameters need to be considered comprehensively, such as the expansion valve opening and air volume to dynamically calculate the target front expansion valve opening. The controller adjusts according to the following logic: If the battery cooling circuit expansion valve opening is high, the front expansion valve opening is appropriately reduced to balance the refrigerant distribution; if the front blower air volume is high, the front expansion valve opening is appropriately increased to meet the front cooling demand; the ratio of the total air volume to the front blower air volume is used to optimize the front expansion valve opening to ensure the overall system operation efficiency.

[0041] In a feasible implementation, step A232 may include steps A2321 to A2327: Step A2321, when the current battery temperature does not exceed the preset battery safety value, obtaining the current position, preset opening value, first air volume threshold, second air volume threshold, first front row preset opening, second front row preset opening and third front row preset opening of the current battery cooling circuit expansion valve; It should be noted that the current position refers to the current actual opening of the battery cooling circuit expansion valve, which is used to indicate the current refrigerant demand intensity of the cooling circuit. The preset opening value represents the fixed basic opening value of the expansion valve, which provides the basic flow rate of the refrigerant. The first air volume threshold and the second air volume threshold are used to determine the boundary values ​​of different working modes of the front blower and the total blower air volume. The first front row preset opening, the second front row preset opening, and the third front row preset opening represent different expansion valve opening values ​​adjusted according to the air volume mode, which are used to meet the front row cooling needs under different air volume conditions.

[0042] Step A2322, when the battery cooling circuit expansion valve opening is greater than the front-row expansion valve opening, taking the current position as the first front-row expansion valve opening; Step A2323, when the battery cooling circuit expansion valve opening is less than or equal to the front-row expansion valve opening, using the preset opening value as the first front-row expansion valve opening; It can be understood that step A2322 and step A2323 represent the comparison between the battery cooling circuit expansion valve opening and the front row expansion valve opening. When the battery cooling circuit expansion valve opening is greater than the front row expansion valve opening, the battery cooling demand is prioritized, and the current position of the battery cooling circuit expansion valve is used as the first front row expansion valve opening; when the battery cooling circuit expansion valve opening is less than or equal to the front row expansion valve opening, the front row cooling demand is prioritized, and the system's preset opening value is used as the first front row expansion valve opening. Through this logic, it can be ensured that the refrigerant distribution meets the current priority demand.

[0043] Step A2324, when the air volume of the front blower is greater than a first air volume threshold, using the first front row preset opening as the second front row expansion valve opening; Step A2325, when the air volume of the blower is less than a second air volume threshold, using the second front row preset opening as the second front row expansion valve opening; Step A2326, when the air volume of the front blower is less than or equal to the first air volume threshold and the air volume of the blower is greater than or equal to the second air volume threshold, using the third front row preset opening as the second front row expansion valve opening; It can be understood that steps A2324 to A2326 represent dynamic adjustment of the opening of the second front row expansion valve according to different conditions of the front blower air volume and the total blower air volume. When the current blower air volume is greater than the first air volume threshold, it indicates that the front row cooling demand is high. At this time, the first front row preset opening is used as the opening of the second front row expansion valve; when the total blower air volume is less than the second air volume threshold, the overall cooling demand of the system is low. At this time, the second front row preset opening is used as the opening of the second front row expansion valve; when the current blower air volume is less than or equal to the first air volume threshold and the total blower air volume is greater than or equal to the second air volume threshold, the system is in a medium load state. At this time, the third front row preset opening is used as the opening of the second front row expansion valve, thereby ensuring that the front row expansion valve opening is dynamically matched with the current air volume demand.

[0044] Step A2327, determining the first front-row expansion valve opening or the second front-row expansion valve opening as the target front-row expansion valve opening according to a preset opening determination strategy.

[0045] It should be noted that the preset opening degree determination strategy indicates that a maximum value is selected from the first front-row expansion valve opening degree and the second front-row expansion valve opening degree as the target front-row expansion valve opening degree.

[0046] It can be understood that, by comprehensively considering the first front-row expansion valve opening and the second front-row expansion valve opening, the larger one is selected as the final target front-row expansion valve opening according to a preset opening determination strategy.

[0047] Step A24, determining a target diversion strategy according to the target front-row expansion valve opening and the target subcooling degree.

[0048] It should be noted that the target front-row expansion valve opening is the optimal opening of the front-row expansion valve determined by the aforementioned calculation, and is used to ensure the front-row cooling demand.

[0049] It is understandable that the calculated target front-row expansion valve opening and target subcooling are used as inputs, combined with the preset diversion rules in the controller, to optimize the refrigerant flow distribution strategy of each circuit. Specifically, when the battery cooling demand is prioritized, the maximum opening of the front-row expansion valve is limited; when the front-row demand is prioritized, the target subcooling is adjusted to adapt to the cooling demand of the front row. Finally, the target diversion strategy is output to guide the dynamic adjustment of each expansion valve.

[0050] In a feasible implementation manner, step S20 may further include steps B21 to B24: Step B21, obtaining a target evaporation temperature according to the rear row cooling mode and the cooling mode of the battery cooling circuit; It should be noted that the rear cooling mode is an operating mode used to meet the cooling needs of the rear passenger compartment, and is usually triggered by the comfort requirements of the passengers. For example, in the high temperature environment in summer, when the rear passenger compartment needs a lower temperature, the rear cooling high demand mode will be entered. The target evaporation temperature refers to the ideal temperature for the refrigerant to exchange heat in the evaporator, which is used to guide the expansion valve to adjust the refrigerant flow to ensure the cooling effect. The lower the target evaporation temperature, the stronger the evaporator's heat absorption capacity, but a greater cooling capacity is required.

[0051] It can be understood that the target evaporation temperature is calculated based on the combination of the current rear cooling mode and the battery cooling circuit cooling mode. When the rear cooling mode demand is high, the target evaporation temperature is set lower to give priority to the comfort needs of the passengers; when the battery cooling demand is high, the target evaporation temperature will be appropriately adjusted to reduce the evaporator load while ensuring battery safety.

[0052] Step B22, when the current battery temperature exceeds the preset battery safety value, taking the preset fixed opening as the target rear expansion valve opening; It is understandable that when the battery cooling circuit detects that the current battery temperature is higher than the preset battery safety value, it enters the battery cooling priority mode. At this time, the target rear expansion valve opening is set to a preset fixed opening, limiting the rear refrigerant distribution and giving priority to battery cooling needs.

[0053] Step B23, when the current battery temperature does not exceed the preset battery safety value, determining a target rear expansion valve opening according to the battery cooling circuit expansion valve opening, the rear expansion valve opening, the rear blower air volume, and the blower air volume; It is understandable that when the current battery temperature is lower than or equal to the preset battery safety value, the battery cooling demand is reduced, and the target rear expansion valve opening is dynamically calculated through the battery cooling circuit expansion valve opening, rear expansion valve opening and air volume parameters. The controller ensures a balance between rear comfort and overall system efficiency through weight analysis.

[0054] In a feasible implementation, step B23 may include steps B231 to B237: Step B231: when the current battery temperature does not exceed the preset battery safety value, obtain the current position, the preset rear row opening value, the first rear row preset opening, the second rear row preset opening and the third rear row preset opening of the current battery cooling circuit expansion valve; It should be noted that the current position refers to the actual opening of the current battery cooling circuit expansion valve, such as 20%, which indicates the current flow demand of the battery cooling system. The preset rear row opening value indicates the basic opening value of the rear row expansion valve, such as 15%, which is used to provide the minimum flow. The first rear row preset opening, the second rear row preset opening, and the third rear row preset opening correspond to the preset openings under high air volume, medium air volume, and low air volume conditions, respectively, to meet different air volume requirements.

[0055] Step B232, when the battery cooling circuit expansion valve opening is greater than the rear-row expansion valve opening, taking the current position as the first rear-row expansion valve opening; Step B233, when the battery cooling circuit expansion valve opening is less than or equal to the rear-row expansion valve opening, using the preset rear-row opening value as the first rear-row expansion valve opening; It can be understood that step B232 and step B233 represent the opening selection strategy by comparing the battery cooling circuit expansion valve opening and the rear-row expansion valve opening. When the battery cooling circuit expansion valve opening is greater than the rear-row expansion valve opening, in order to prioritize the battery cooling demand, the system uses the current position of the battery cooling circuit expansion valve as the first rear-row expansion valve opening; and when the battery cooling circuit expansion valve opening is less than or equal to the rear-row expansion valve opening, in order to prioritize the rear-row cooling demand, the preset rear-row opening value is used as the first rear-row expansion valve opening, thereby dynamically adjusting the refrigerant distribution to adapt to the current cooling demand.

[0056] Step B234, when the air volume of the rear blower is greater than a first air volume threshold, using the first rear row preset opening as the second rear row expansion valve opening; Step B235, when the air volume of the blower is less than a second air volume threshold, using the second rear row preset opening as the second rear row expansion valve opening; Step B236, when the air volume of the rear blower is less than or equal to the first air volume threshold and the air volume of the blower is greater than or equal to the second air volume threshold, using the third rear row preset opening as the second rear row expansion valve opening; It can be understood that step B234 to step B236 represent dynamically adjusting the opening of the second rear row expansion valve according to the actual air volume. When the rear blower air volume is greater than the first air volume threshold, it indicates that the rear air circulation demand is high, and the first rear row preset opening is used as the second rear row expansion valve opening; when the total blower air volume is less than the second air volume threshold, the overall cooling demand is low, and the second rear row preset opening is used as the second rear row expansion valve opening; and when the rear blower air volume is less than or equal to the first air volume threshold and the total blower air volume is greater than or equal to the second air volume threshold, it is in a medium load state, and the third rear row preset opening is used as the second rear row expansion valve opening to ensure that the refrigerant distribution matches the air volume demand and optimize the rear row cooling effect.

[0057] Step B237: determining the first rear-row expansion valve opening or the second rear-row expansion valve opening as a target rear-row expansion valve opening according to a preset opening determination strategy.

[0058] It can be understood that the preset opening determination strategy indicates that a maximum value is selected between the first rear-row expansion valve opening and the second rear-row expansion valve opening as the target rear-row expansion valve opening. According to the preset opening determination strategy, a larger value that meets actual needs is selected between the first rear-row expansion valve opening and the second rear-row expansion valve opening as the final target value.

[0059] Step B24, determining a target diversion strategy according to the target rear-row expansion valve opening and the target evaporation temperature.

[0060] It is understandable that the controller optimizes the distribution of refrigerant flow between the rear row and the battery cooling circuits in combination with the target rear row expansion valve opening and the target evaporation temperature. When the rear row demand is high, the rear row expansion valve opening is increased; when the battery demand is high, the rear row expansion valve opening is reduced to prioritize the flow of the battery cooling circuit.

[0061] Step S30, controlling the expansion valve opening according to the target diversion strategy to complete the expansion valve diversion control.

[0062] It can be understood that by dynamically controlling the expansion valve opening and adjusting the refrigerant flow in real time according to the target diversion strategy, accurate response and allocation of each circuit demand can be achieved, ensuring the efficient operation and stability of the vehicle's multi-circuit refrigeration system.

[0063] This embodiment provides an expansion valve shunt control method. Through an intelligent expansion valve shunt control method, sensor data and preset parameters are comprehensively used to solve the technical problems of uneven refrigerant distribution and low efficiency in traditional vehicle refrigeration systems. By real-time monitoring and analyzing key parameters such as the vehicle's current refrigeration mode, preset fixed opening, battery cooling circuit expansion valve opening, front and rear expansion valve openings, and blower air volume, the refrigerant flow rate can be dynamically adjusted to give priority to the needs of battery cooling and passenger comfort, while optimizing energy consumption and reducing energy consumption. It not only improves the response speed and accuracy of the vehicle refrigeration system, but also enhances the stability and reliability of the system, ensuring that efficient refrigeration effects can be achieved under different working conditions, improving passenger comfort and the overall performance of the vehicle. In addition, through intelligent control, the service life of batteries and other key components can be extended, maintenance costs can be reduced, and the dual goals of energy conservation and emission reduction and improved economic benefits can be achieved.

[0064] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 3, step S20 of the expansion valve diversion control method further includes steps S21 to S27: Step S21, obtaining a first rear row preset opening, a second rear row preset opening, and a third rear row preset opening; It should be noted that the first rear row preset opening represents the opening of the rear row expansion valve under high air volume conditions, which is used to meet strong cooling needs. The second rear row preset opening represents the opening of the rear row expansion valve under low air volume conditions, which is used to save refrigerant flow. The third rear row preset opening represents the opening of the rear row expansion valve under medium air volume conditions, which balances the cooling effect and refrigerant consumption.

[0065] Step S22, obtaining a preset mixed opening degree according to the front row cooling mode and the rear row cooling mode; It should be noted that the preset mixed opening represents the comprehensive expansion valve opening value obtained by combining the front row and rear row cooling requirements, which is used to balance the refrigerant distribution in the two areas.

[0066] It can be understood that when both the front and rear row cooling modes are turned on, a preset mixed opening degree can be obtained by analyzing the front and rear row cooling modes and combining the priority and demand intensity of the two areas.

[0067] Step S23, when the air volume of the front blower is greater than a first air volume threshold, using the first rear row preset opening as a target rear row expansion valve opening; Step S24, when the blower air volume is less than a second air volume threshold, using the second rear row preset opening as a target rear row expansion valve opening; Step S25, when the air volume of the front blower is less than or equal to the first air volume threshold and the air volume of the blower is greater than or equal to the second air volume threshold, taking the third rear row preset opening as the target rear row expansion valve opening; It can be understood that step S23 to step S25 represent dynamic adjustment of the target rear-row expansion valve opening according to different air volume conditions. When the current blower air volume is greater than the first air volume threshold, it indicates that the front-row air circulation demand is relatively high, and the first rear-row preset opening is used as the target rear-row expansion valve opening; when the total blower air volume is less than the second air volume threshold, the overall cooling demand is relatively low, and the second rear-row preset opening is used as the target rear-row expansion valve opening; and when the current blower air volume is less than or equal to the first air volume threshold and the total blower air volume is greater than or equal to the second air volume threshold, it is in a medium load state, and the third rear-row preset opening is used as the target rear-row expansion valve opening, so as to achieve dynamic matching of air volume demand and refrigerant distribution and optimize the rear-row cooling effect.

[0068] Step S26, using the preset mixed opening as the front expansion valve opening, and using the target rear expansion valve opening as the rear expansion valve opening; It can be understood that the preset mixed opening calculated by S22 is used as the target opening of the front expansion valve, and the target rear expansion valve opening determined by S23~S25 is used as the target opening of the rear expansion valve, providing a basis for the subsequent diversion strategy.

[0069] Step S27, determining a target flow diversion strategy according to the opening of the front expansion valve and the opening of the rear expansion valve.

[0070] It can be understood that the optimization scheme of dynamically allocating the refrigerant flow rate is combined with the opening of the expansion valves in the front and rear rows.

[0071] This embodiment provides an expansion valve flow diversion control method, which solves the technical problem of the difficulty in balancing the cooling effect and refrigerant consumption under different air volume conditions in traditional air-conditioning systems by accurately controlling the opening of the front and rear expansion valves. By obtaining the preset opening of the front and rear rows and dynamically adjusting the expansion valve opening according to the actual air volume and cooling demand, the optimal distribution of the refrigerant flow is achieved, ensuring that energy is saved to the maximum extent and refrigerant waste is reduced while satisfying the comfort of passengers. Not only does it improve the energy efficiency of the air-conditioning system, it also enhances the comfort of passengers and realizes more intelligent and personalized temperature control, thereby achieving the dual beneficial effects of energy saving and emission reduction and improving the riding experience.

[0072] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the expansion valve shunt control method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0073] The present application also provides an expansion valve flow control device, please refer to Figure 4 , the expansion valve flow splitting control device comprises: an acquisition module 10, for acquiring a current cooling mode of the vehicle, a preset fixed opening, a battery cooling circuit expansion valve opening, a front row expansion valve opening, a front blower air volume, a rear blower air volume, and a blower air volume, wherein the current cooling mode includes a front row cooling mode, a rear row cooling mode, and a cooling mode of the battery cooling circuit; a determination module 20, configured to determine a target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume; The control module 30 is used to control the expansion valve opening according to the target diversion strategy to complete the expansion valve diversion control.

[0074] The expansion valve shunt control device provided by the present application adopts the expansion valve shunt control method in the above embodiment, which can solve the technical problem that the traditional expansion valve control method cannot optimize the shunt strategy based on multiple variables in real time, resulting in inaccurate refrigerant flow distribution when multiple circuits work together, thereby affecting the system operation efficiency and stability. Compared with the prior art, the beneficial effects of the expansion valve shunt control device provided by the present application are the same as the beneficial effects of the expansion valve shunt control method provided by the above embodiment, and the other technical features in the expansion valve shunt control device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0075] In one embodiment, the determination module 20 is also used to obtain the current battery temperature and the preset battery safety value; set the front row expansion valve to the adjustment cooling mode according to the front row refrigeration mode and the cooling mode of the battery cooling circuit to obtain the target supercooling degree; obtain the target front row expansion valve opening according to the current battery temperature, the preset battery safety value, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume and the blower air volume; determine the target diversion strategy according to the target front row expansion valve opening and the target supercooling degree.

[0076] In one embodiment, the determination module 20 is also used to use the preset fixed opening as the target front expansion valve opening when the current battery temperature exceeds the preset battery safety value; when the current battery temperature does not exceed the preset battery safety value, determine the target front expansion valve opening according to the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume and the blower air volume.

[0077] In one embodiment, the determination module 20 is further used to obtain the current position, preset opening value, first air volume threshold, second air volume threshold, first front row preset opening, second front row preset opening and third front row preset opening of the current battery cooling circuit expansion valve when the current battery temperature does not exceed the preset battery safety value; when the opening of the battery cooling circuit expansion valve is greater than the opening of the front row expansion valve, the current position is used as the first front row expansion valve opening; when the opening of the battery cooling circuit expansion valve is less than or equal to the opening of the front row expansion valve, the preset opening value is used as the first front row expansion valve opening; when the front blower air volume is greater than a first air volume threshold, the first front row preset opening is used as the second front row expansion valve opening; when the blower air volume is less than the second air volume threshold, the second front row preset opening is used as the second front row expansion valve opening; when the front blower air volume is less than or equal to the first air volume threshold and the blower air volume is greater than or equal to the second air volume threshold, the third front row preset opening is used as the second front row expansion valve opening; according to the preset opening determination strategy, the first front row expansion valve opening or the second front row expansion valve opening is used as the target front row expansion valve opening.

[0078] In one embodiment, the determination module 20 is also used to obtain a first rear row preset opening, a second rear row preset opening and a third rear row preset opening; obtain a preset mixed opening according to the front row refrigeration mode and the rear row refrigeration mode; when the front blower air volume is greater than a first air volume threshold, use the first rear row preset opening as the target rear row expansion valve opening; when the blower air volume is less than a second air volume threshold, use the second rear row preset opening as the target rear row expansion valve opening; when the front blower air volume is less than or equal to the first air volume threshold and the blower air volume is greater than or equal to the second air volume threshold, use the third rear row preset opening as the target rear row expansion valve opening; use the preset mixed opening as the front expansion valve opening, and use the target rear row expansion valve opening as the rear row expansion valve opening; determine the target diversion strategy according to the front expansion valve opening and the rear row expansion valve opening.

[0079] In one embodiment, the determination module 20 is also used to obtain a target evaporation temperature according to the rear cooling mode and the cooling mode of the battery cooling circuit; when the current battery temperature exceeds the preset battery safety value, the preset fixed opening is used as the target rear expansion valve opening; when the current battery temperature does not exceed the preset battery safety value, the target rear expansion valve opening is determined according to the battery cooling circuit expansion valve opening, the rear expansion valve opening, the rear blower air volume and the blower air volume; and the target diversion strategy is determined according to the target rear expansion valve opening and the target evaporation temperature.

[0080] In one embodiment, the determination module 20 is further used to obtain the current position of the current battery cooling circuit expansion valve, the preset rear row opening value, the first rear row preset opening, the second rear row preset opening and the third rear row preset opening when the current battery temperature does not exceed the preset battery safety value; when the battery cooling circuit expansion valve opening is greater than the rear row expansion valve opening, the current position is used as the first rear row expansion valve opening; when the battery cooling circuit expansion valve opening is less than or equal to the rear row expansion valve opening, the preset rear row opening value is used as the first rear row expansion valve opening; in the rear When the blower air volume is greater than a first air volume threshold, the first rear row preset opening is used as the second rear row expansion valve opening; when the blower air volume is less than the second air volume threshold, the second rear row preset opening is used as the second rear row expansion valve opening; when the rear blower air volume is less than or equal to the first air volume threshold and the blower air volume is greater than or equal to the second air volume threshold, the third rear row preset opening is used as the second rear row expansion valve opening; according to the preset opening determination strategy, the first rear row expansion valve opening or the second rear row expansion valve opening is used as the target rear row expansion valve opening.

[0081] The present application provides an expansion valve shunt control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the expansion valve shunt control method in the above-mentioned embodiment one.

[0082] Reference below Figure 5 , which shows a schematic diagram of the structure of an expansion valve shunt control device suitable for implementing the embodiment of the present application. The expansion valve shunt control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The expansion valve shunt control device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0083] like Figure 5As shown, the expansion valve flow split control device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the expansion valve flow split control device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the expansion valve shunt control device to communicate with other devices wirelessly or by wire to exchange data. Although the expansion valve shunt control device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0084] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0085] The expansion valve shunt control device provided by the present application adopts the expansion valve shunt control method in the above embodiment, which can solve the technical problem that the traditional expansion valve control method cannot optimize the shunt strategy based on multiple variables in real time, resulting in inaccurate refrigerant flow distribution when multiple circuits work together, thereby affecting the system operation efficiency and stability. Compared with the prior art, the beneficial effects of the expansion valve shunt control device provided by the present application are the same as the beneficial effects of the expansion valve shunt control method provided by the above embodiment, and the other technical features in the expansion valve shunt control device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0086] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0087] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0088] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the expansion valve diversion control method in the above-mentioned embodiment.

[0089] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM: Random Access Memory), a read-only memory (ROM: Read Only Memory), an erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: Radio Frequency), etc., or any suitable combination of the above.

[0090] The computer-readable storage medium may be included in the expansion valve flow diversion control device; or may exist independently without being assembled into the expansion valve flow diversion control device.

[0091] The computer-readable storage medium carries one or more programs, and when the one or more programs are executed by the expansion valve shunt control device, the expansion valve shunt control device: obtains a current cooling mode of the vehicle, a preset fixed opening, a battery cooling circuit expansion valve opening, a front row expansion valve opening, a front blower air volume, a rear blower air volume, and a blower air volume, wherein the current cooling mode includes a front row cooling mode, a rear row cooling mode, and a cooling mode of the battery cooling circuit; determining a target flow diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume; The expansion valve opening is controlled according to the target diversion strategy to complete the expansion valve diversion control.

[0092] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0093] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0094] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0095] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned expansion valve shunt control method, and can solve the technical problem that the traditional expansion valve control method cannot optimize the shunt strategy in real time based on multiple variables, resulting in inaccurate refrigerant flow distribution when multiple circuits work together, thereby affecting the system operation efficiency and stability. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the expansion valve shunt control method provided in the above-mentioned embodiment, and will not be repeated here.

[0096] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the expansion valve diversion control method as described above are implemented.

[0097] The computer program product provided by the present application can solve the technical problem that the traditional expansion valve control method cannot optimize the diversion strategy in real time based on multiple variables, resulting in inaccurate refrigerant flow distribution when multiple circuits work together, thereby affecting the system operation efficiency and stability. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the expansion valve diversion control method provided by the above embodiment, and will not be repeated here.

[0098] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for controlling flow diversion of an expansion valve, characterized in that: The method comprises: Obtaining a current cooling mode of the vehicle, a preset fixed opening, a battery cooling circuit expansion valve opening, a front row expansion valve opening, a front blower air volume, a rear blower air volume, and a blower air volume, wherein the current cooling mode includes a front row cooling mode, a rear row cooling mode, and a cooling mode of the battery cooling circuit; determining a target flow diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume; The expansion valve opening is controlled according to the target diversion strategy to complete the expansion valve diversion control.

2. The method according to claim 1, characterized in that The step of determining the target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume comprises: Get the current battery temperature and preset battery safety value; Setting the front row expansion valve to a regulating cooling mode according to the front row cooling mode and the cooling mode of the battery cooling circuit to obtain a target degree of supercooling; Obtaining a target front expansion valve opening according to the current battery temperature, the preset battery safety value, the preset fixed opening, the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume, and the blower air volume; A target diversion strategy is determined according to the target front-row expansion valve opening and the target subcooling degree.

3. The method according to claim 2, characterized in that The step of obtaining a target front expansion valve opening according to the current battery temperature, the preset battery safety value, the preset fixed opening, the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume, and the blower air volume comprises: When the current battery temperature exceeds the preset battery safety value, the preset fixed opening is used as the target front-row expansion valve opening; When the current battery temperature does not exceed the preset battery safety value, the target front expansion valve opening is determined according to the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume and the blower air volume.

4. The method according to claim 3, characterized in that The step of determining the target front expansion valve opening according to the battery cooling circuit expansion valve opening, the front expansion valve opening, the front blower air volume and the blower air volume when the current battery temperature does not exceed the preset battery safety value comprises: When the current battery temperature does not exceed the preset battery safety value, obtaining the current position, preset opening value, first air volume threshold, second air volume threshold, first front row preset opening, second front row preset opening and third front row preset opening of the current battery cooling circuit expansion valve; When the battery cooling circuit expansion valve opening is greater than the front-row expansion valve opening, taking the current position as the first front-row expansion valve opening; When the battery cooling circuit expansion valve opening is less than or equal to the front-row expansion valve opening, the preset opening value is used as the first front-row expansion valve opening; When the air volume of the front blower is greater than a first air volume threshold, the first front row preset opening is used as the second front row expansion valve opening; When the air volume of the blower is less than a second air volume threshold, using the second front row preset opening as the second front row expansion valve opening; When the air volume of the front blower is less than or equal to the first air volume threshold and the air volume of the blower is greater than or equal to the second air volume threshold, the third front row preset opening is used as the second front row expansion valve opening; The first front-row expansion valve opening or the second front-row expansion valve opening is used as a target front-row expansion valve opening according to a preset opening determination strategy.

5. The method according to claim 1, characterized in that The step of determining the target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume also includes: Obtaining a first rear row preset opening, a second rear row preset opening, and a third rear row preset opening; Obtaining a preset mixed opening degree according to the front row cooling mode and the rear row cooling mode; When the air volume of the front blower is greater than a first air volume threshold, taking the first rear row preset opening as a target rear row expansion valve opening; When the blower air volume is less than a second air volume threshold, taking the second rear row preset opening as the target rear row expansion valve opening; When the air volume of the front blower is less than or equal to the first air volume threshold and the air volume of the blower is greater than or equal to the second air volume threshold, the third rear row preset opening is used as the target rear row expansion valve opening; Using the preset mixed opening as the front expansion valve opening, and using the target rear expansion valve opening as the rear expansion valve opening; A target flow diversion strategy is determined according to the opening of the front expansion valve and the opening of the rear expansion valve.

6. The method according to claim 1, characterized in that The step of determining the target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume also includes: obtaining a target evaporation temperature according to the rear row cooling mode and the cooling mode of the battery cooling circuit; When the current battery temperature exceeds the preset battery safety value, the preset fixed opening is used as the target rear expansion valve opening; When the current battery temperature does not exceed the preset battery safety value, determining a target rear expansion valve opening according to the battery cooling circuit expansion valve opening, the rear expansion valve opening, the rear blower air volume, and the blower air volume; A target diversion strategy is determined according to the target rear-row expansion valve opening and the target evaporation temperature.

7. The method according to claim 6, characterized in that The step of determining the target rear expansion valve opening according to the battery cooling circuit expansion valve opening, the rear expansion valve opening, the rear blower air volume and the blower air volume when the current battery temperature does not exceed the preset battery safety value comprises: When the current battery temperature does not exceed the preset battery safety value, obtaining the current position of the current battery cooling circuit expansion valve, the preset rear row opening value, the first rear row preset opening, the second rear row preset opening, and the third rear row preset opening; When the battery cooling circuit expansion valve opening is greater than the rear-row expansion valve opening, the current position is used as the first rear-row expansion valve opening; When the battery cooling circuit expansion valve opening is less than or equal to the rear-row expansion valve opening, the preset rear-row opening value is used as the first rear-row expansion valve opening; When the air volume of the rear blower is greater than a first air volume threshold, the first rear row preset opening is used as the second rear row expansion valve opening; When the air volume of the blower is less than a second air volume threshold, the second rear row preset opening is used as the second rear row expansion valve opening; When the air volume of the rear blower is less than or equal to the first air volume threshold and the air volume of the blower is greater than or equal to the second air volume threshold, using the third rear row preset opening as the second rear row expansion valve opening; The first rear-row expansion valve opening or the second rear-row expansion valve opening is used as a target rear-row expansion valve opening according to a preset opening determination strategy.

8. An expansion valve flow diversion control device, characterized in that: The device comprises: an acquisition module, used to acquire a current cooling mode of the vehicle, a preset fixed opening, a battery cooling circuit expansion valve opening, a front row expansion valve opening, a front blower air volume, a rear blower air volume, and a blower air volume, wherein the current cooling mode includes a front row cooling mode, a rear row cooling mode, and a cooling mode of the battery cooling circuit; a determination module, configured to determine a target diversion strategy according to at least three of the current cooling mode, the preset fixed opening, the battery cooling circuit expansion valve opening, the front row expansion valve opening, the front blower air volume, the rear blower air volume, and the blower air volume; The control module is used to control the expansion valve opening according to the target diversion strategy to complete the expansion valve diversion control.

9. An expansion valve flow splitting control device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the expansion valve flow diversion control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the expansion valve diversion control method according to any one of claims 1 to 7 are implemented.

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