Valve control method and device and vehicle

Abstract

The invention relates to a valve control method and device and a vehicle, and relates to the technical field of vehicles, the method comprises the steps that under the condition that a target object in the vehicle has a refrigeration requirement, the opening degree of a target expansion valve is controlled, and the target object comprises a passenger compartment and / or a battery system of the vehicle; the target expansion valve comprises a first expansion valve of the passenger compartment or a second expansion valve of the battery system. And other expansion valves are controlled according to the opening degree of the target expansion valve, and the other expansion valves are the other one of the first expansion valve and the second expansion valve except the target expansion valve. According to the refrigeration requirement of the vehicle, the opening degree of one expansion valve of the vehicle is controlled firstly, then the other expansion valve is controlled according to the opening degree of the expansion valve, cooperative control over the multiple expansion valves can be achieved, and the accuracy of valve control is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular, to a valve control method, a valve control device and a vehicle. Background Art

[0002] The thermal management of pure electric vehicles plays a vital role in the new energy vehicle industry. As the industry continues to develop, the high performance requirements for vehicles, such as driving range, battery life and fast charging time, have made the thermal management of the vehicle increasingly complex and demanding. In the thermal management system of electric vehicles, the expansion valve is a key component, and its control strategy directly affects the energy efficiency, stability and passenger comfort of the system. At present, the control strategy of the expansion valve has the problem of low control accuracy. Summary of the invention

[0003] The purpose of the present disclosure is to provide a valve control method, device and vehicle for improving the control accuracy of an expansion valve.

[0004] According to a first aspect of an embodiment of the present disclosure, a valve control method is provided, the method comprising: When a target object in a vehicle has a cooling demand, controlling the opening of a target expansion valve, the target object comprising a passenger compartment and / or a battery system of the vehicle, and the target expansion valve comprising a first expansion valve of the passenger compartment or a second expansion valve of the battery system; According to the opening degree of the target expansion valve, other expansion valves are controlled, where the other expansion valves are another valve of the first expansion valve and the second expansion valve except the target expansion valve.

[0005] Optionally, the target object includes the passenger compartment or the battery system, and the target expansion valve is an expansion valve of the target object; and controlling the opening of the target expansion valve includes: The opening of the target expansion valve is controlled according to the superheat of the target object and the target superheat threshold.

[0006] Optionally, controlling other expansion valves according to the opening of the target expansion valve includes: When the opening of the target expansion valve is less than a preset opening threshold, the opening of the other expansion valves is controlled according to the designated valve opening; or, When the opening degree of the target expansion valve is greater than or equal to the preset opening degree threshold, the other expansion valves are closed.

[0007] Optionally, the target superheat threshold may be determined in the following manner: obtaining a heat load of the vehicle; The target superheat threshold is determined according to the heat load.

[0008] Optionally, determining the target superheat threshold according to the heat load includes: When the heat load is greater than a preset heat load threshold, increasing the target superheat threshold; When the heat load is less than or equal to the preset heat load threshold, the target superheat threshold is reduced.

[0009] Optionally, the target object includes the passenger compartment and the battery system, the target expansion valve is the first expansion valve; and controlling the opening of the target expansion valve includes: The opening of the first expansion valve is controlled according to the blower gear position of the passenger compartment, the set temperature of the evaporator of the vehicle and the ambient temperature.

[0010] Optionally, the other expansion valve is the second expansion valve; and the controlling the other expansion valve according to the opening of the target expansion valve comprises: Determining a target coefficient according to the water inlet temperature of the battery system and the actual temperature of the evaporator; determining a target valve opening according to the opening of the first expansion valve and the target coefficient; The opening of the second expansion valve is controlled according to the target valve opening.

[0011] Optionally, the method further comprises: The opening of the third expansion valve of the condenser of the vehicle is controlled according to the blower gear position of the passenger compartment of the vehicle, the set temperature of the evaporator and the ambient temperature.

[0012] According to a second aspect of an embodiment of the present disclosure, a valve control device is provided, the device comprising: a first control module, configured to control the opening of a target expansion valve when a target object in the vehicle has a cooling demand, the target object comprising a passenger compartment and / or a battery system of the vehicle, the target expansion valve comprising a first expansion valve of the passenger compartment or a second expansion valve of the battery system; The second control module is configured to control other expansion valves according to the opening degree of the target expansion valve, where the other expansion valve is another valve of the first expansion valve and the second expansion valve except the target expansion valve.

[0013] Optionally, the target object includes the passenger compartment or the battery system, and the target expansion valve is an expansion valve of the target object; and the first control module is configured as follows: The opening of the target expansion valve is controlled according to the superheat of the target object and the target superheat threshold.

[0014] Optionally, the second control module is configured to: When the opening of the target expansion valve is less than a preset opening threshold, the opening of the other expansion valves is controlled according to the designated valve opening; or, When the opening degree of the target expansion valve is greater than or equal to the preset opening degree threshold, the other expansion valves are closed.

[0015] Optionally, the target superheat threshold may be determined in the following manner: obtaining a heat load of the vehicle; The target superheat threshold is determined according to the heat load.

[0016] Optionally, determining the target superheat threshold according to the heat load includes: When the heat load is greater than a preset heat load threshold, increasing the target superheat threshold; When the heat load is less than or equal to the preset heat load threshold, the target superheat threshold is reduced.

[0017] Optionally, the target object includes the passenger compartment and the battery system, the target expansion valve is the first expansion valve; and the first control module is configured as follows: The opening of the first expansion valve is controlled according to the blower gear position of the passenger compartment, the set temperature of the evaporator of the vehicle and the ambient temperature.

[0018] Optionally, the other expansion valve is the second expansion valve; and the second control module is configured as: Determining a target coefficient according to the water inlet temperature of the battery system and the actual temperature of the evaporator; determining a target valve opening according to the opening of the first expansion valve and the target coefficient; The opening of the second expansion valve is controlled according to the target valve opening.

[0019] Optionally, the device further comprises: The third control module is configured to control the opening of the third expansion valve of the condenser of the vehicle according to the blower gear of the passenger compartment of the vehicle, the set temperature of the evaporator and the ambient temperature.

[0020] According to a third aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the steps of the method described in the first aspect of the embodiment of the present disclosure are implemented.

[0021] According to a fourth aspect of an embodiment of the present disclosure, a vehicle is provided, comprising: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the steps of the method described in the first aspect of the embodiment of the present disclosure.

[0022] According to a fifth aspect of an embodiment of the present disclosure, a computer program product is provided, including a computer program, which implements the steps of the method described in the first aspect of the embodiment of the present disclosure when executed by a processor.

[0023] Through the above technical solution, the present disclosure controls the opening of the target expansion valve when there is a cooling demand in the passenger compartment and / or the battery system in the vehicle, wherein the target expansion valve includes the first expansion valve in the passenger compartment or the second expansion valve in the battery system. Then, according to the opening of the target expansion valve, other expansion valves are controlled, wherein the other expansion valve is another valve other than the target expansion valve between the first expansion valve and the second expansion valve. The present disclosure first controls the opening of an expansion valve of the vehicle according to the cooling demand of the vehicle, and then controls another expansion valve according to the opening of the expansion valve, thereby realizing coordinated control of multiple expansion valves and improving the accuracy of valve control.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 It is an architectural diagram of an integrated indirect heat pump system in the related art.

[0026] Figure 2 The figure is a flow chart of a valve control method according to an exemplary embodiment.

[0027] Figure 3 The figure is a flow chart of another valve control method according to an exemplary embodiment.

[0028] Figure 4 It is a flow chart of the control strategy of ChillerEXV of a battery system.

[0029] Figure 5 A flow chart of a control strategy for an evaporator EXV of a passenger compartment.

[0030] Figure 6It is a flow chart of the control strategy of the condenser CondEXV.

[0031] Figure 7 The figure is a block diagram of a valve control device according to an exemplary embodiment.

[0032] Figure 8 is a block diagram of another valve control device according to an exemplary embodiment.

[0033] Fig. 9 is a block diagram of a vehicle according to an exemplary embodiment. DETAILED DESCRIPTION

[0034] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0035] Before introducing a valve control method, device and vehicle shown in the embodiments of the present disclosure, the application scenarios of the embodiments of the present disclosure are first introduced.

[0036] The heat pump system of electric vehicles involves more components such as refrigerant valves and coolant valves than non-heat pump systems, which increases the complexity of the system and the difficulty of control. Traditional evaporator control systems mostly use thermal expansion valves (Thermostatic eXpansion Valve, TXV), but they have disadvantages such as slow response speed and low adjustment accuracy. At present, some new energy vehicles have adopted electronic expansion valves (Electronic eXpansion Valve, EXV) as key components of the thermal management system. The control strategy of the electronic expansion valve directly affects the energy efficiency, stability and passenger comfort of the system.

[0037] At present, the EXV in the vehicle's thermal management system can include: evaporator EXV, battery cooler ChillerEXV and condenser CondEXV. Among them, the evaporator EXV control is designed to solve the problems of inaccurate refrigerant flow regulation, slow response speed, and low energy efficiency in traditional evaporator control systems; ChillerEXV control is designed to solve the problems of inaccurate cooling capacity regulation and low energy efficiency in the traditional Chiller system during the battery refrigeration process of new energy vehicles; Condenser EXV control is designed to solve the problems of incomplete refrigerant condensation and low energy efficiency in traditional condenser control systems. Through the optimization control strategy of the three valves, more accurate cooling capacity regulation and energy efficiency optimization can be achieved. At present, there are problems of inefficient coordinated control and inaccurate temperature control between the evaporator EXV, condenser EXV and battery ChillerEXV in the thermal management system of new energy vehicles.

[0038] Figure 1is an architectural diagram of an integrated indirect heat pump system in the related art, such as Figure 1 As shown, the system includes: a passenger compartment thermal management circuit and a battery thermal management circuit, and each circuit is introduced below.

[0039] Passenger compartment refrigeration circuit: The air conditioning compressor is responsible for compressing the refrigerant and driving the refrigeration cycle. The condenser condenses and liquefies the refrigerant. The evaporator EXV is used to throttle and gasify the refrigerant in the evaporator, exchange heat with the passenger compartment air, and reduce the temperature in the cabin. The temperature sensor LPT4 monitors the compressor suction temperature and pressure, and R-T1 monitors the compressor exhaust temperature.

[0040] Passenger compartment heating circuit: In heat pump mode, the air compressor drives the refrigerant circulation, and the heat of the high-temperature refrigerant heats the coolant through the LCC. The LEXV2 valve controls the refrigerant throttling and pressure reduction, and the condenser evaporates and absorbs heat.

[0041] Battery refrigeration circuit: The air compressor drives the refrigerant circulation, and the condenser condenses and liquefies the refrigerant. The LEXV1 valve controls the throttling and gasification of the refrigerant in the battery cooler, and exchanges heat with the coolant to reduce the battery temperature.

[0042] Battery heating circuit: In heat pump mode, the air compressor drives the refrigerant to circulate and heat the coolant. The LEXV2 valve and condenser work together to achieve refrigerant throttling and pressure reduction and evaporation heat absorption, and finally return to the compressor.

[0043] The valve control method in the embodiment of the present disclosure can be based on Figure 1 Integrated indirect heat pump system shown.

[0044] Figure 2 is a flow chart of a valve control method according to an exemplary embodiment. Figure 2 As shown, the method may include: Step S101, when a target object in a vehicle has a cooling demand, controlling the opening of a target expansion valve, the target object includes a passenger compartment and / or a battery system of the vehicle, and the target expansion valve includes a first expansion valve in the passenger compartment or a second expansion valve in the battery system.

[0045] Step S102 : controlling other expansion valves according to the opening degree of the target expansion valve, where the other expansion valve is another valve of the first expansion valve and the second expansion valve except the target expansion valve.

[0046] For example, the first expansion valve in the embodiment of the present disclosure may be an evaporator EXV of a passenger compartment, and the second expansion valve may be a Chiller EXV of a battery system.

[0047] In some embodiments, when the target object includes a passenger compartment or a battery system, that is, when the passenger compartment or the battery system in the vehicle has a cooling demand, the target expansion valve may be the expansion valve of the target object. Accordingly, the opening of the target expansion valve may be controlled according to the superheat of the target object and the target superheat threshold. Among them, the target superheat threshold may include an upper superheat limit and a lower superheat limit. For example, if the superheat of the target object is greater than or equal to the upper superheat limit, the opening of the target expansion valve may be increased to reduce the superheat of the target object. If the superheat of the target object is less than or equal to the lower superheat limit, the opening of the target expansion valve may be reduced to increase the superheat of the target object. If the superheat of the target object is less than the upper superheat limit and greater than the lower superheat limit, the target expansion valve may not be controlled.

[0048] When the opening of the target expansion valve is less than the preset opening threshold, the openings of other expansion valves can be controlled according to the specified valve openings. When the opening of the target expansion valve is greater than or equal to the preset opening threshold, other expansion valves are closed.

[0049] In the case where the target object includes a battery system, that is, when the battery system in the vehicle has a cooling demand, the target expansion valve may be a second expansion valve, and the overheat of the battery system may be calculated, and the opening of the second expansion valve may be controlled according to the overheat of the battery system and the target overheat threshold. If the opening of the second expansion valve is less than a preset opening threshold, the opening of the first expansion valve may be controlled according to a specified valve opening, wherein the preset opening threshold may be the minimum opening of the second expansion valve, and the specified valve opening may be the minimum opening of the first expansion valve. If the opening of the second expansion valve is greater than or equal to the preset opening threshold, the first expansion valve may be closed. In this way, the problem of the refrigerant flow being too small or the system failure caused by the second expansion valve being cut off due to the opening being too small can be avoided.

[0050] In the case where the target object includes the passenger compartment, that is, when there is a cooling demand for the passenger compartment in the vehicle, the target expansion valve may be the first expansion valve, and the superheat of the passenger compartment may be calculated, and the opening of the first expansion valve may be controlled according to the superheat of the passenger compartment and the target superheat threshold. If the opening of the first expansion valve is less than the preset opening threshold, the opening of the second expansion valve may be controlled according to the specified valve opening, wherein the preset opening threshold may be the minimum opening of the first expansion valve, and the specified valve opening may be the minimum opening of the second expansion valve. If the opening of the first expansion valve is greater than or equal to the preset opening threshold, the second expansion valve may be closed. In this way, the problem that the opening of the first expansion valve is too small, resulting in too small refrigerant flow or cutoff causing system failure can be avoided.

[0051] In this way, when the vehicle's battery system has a cooling demand, the vehicle's second expansion valve is dynamically adjusted in combination with the first expansion valve of the passenger compartment. When the vehicle's passenger compartment has a cooling demand, the first expansion valve is dynamically adjusted in combination with the opening of the second expansion valve of the battery system. This enables coordinated control of multiple expansion valves and improves the accuracy of valve control.

[0052] In some other embodiments, the target superheat threshold may be determined by: Get the heat load of the vehicle.

[0053] The target superheat threshold is determined based on the heat load.

[0054] For example, when the thermal load of the vehicle is greater than a preset thermal load threshold, the target superheat threshold can be increased. When the thermal load is less than or equal to the preset thermal load threshold, the target superheat threshold can be reduced. In this way, dynamically adjusting the target superheat threshold according to the thermal load of the vehicle can reduce the fluctuation range of system operation, reduce unnecessary frequent adjustments, and ensure that the temperature in the passenger compartment is stable and comfortable.

[0055] In other embodiments, when the thermal load of the vehicle increases, such as when the number of passengers increases or the solar radiation increases, the upper superheat limit in the target superheat threshold can be increased to ensure sufficient cooling capacity; and when the thermal load of the vehicle decreases, such as when the number of passengers decreases or the solar radiation decreases, the upper superheat limit in the target superheat threshold can be lowered to avoid unnecessary energy waste.

[0056] In some other embodiments, the target object may include a passenger compartment and a battery system, and the target expansion valve may be a first expansion valve. An implementation of step S101 may be: The opening of the first expansion valve is controlled according to the blower gear position of the passenger compartment, the set temperature of the evaporator of the vehicle and the ambient temperature.

[0057] For example, the blower gear position of the passenger compartment, the set temperature of the evaporator of the vehicle and the ambient temperature can be obtained, and the opening of the first expansion valve can be obtained through the first preset correspondence, wherein the first preset correspondence can be the correspondence between the blower gear position of the passenger compartment, the set temperature of the evaporator of the vehicle, the ambient temperature and the opening of the first expansion valve, the first preset correspondence can also be the correspondence between the blower gear position of the passenger compartment, the set temperature of the evaporator of the vehicle, the ambient temperature and the number of steps of the first expansion valve, the first preset correspondence can be a first preset table, a first preset function or a first preset model, etc., and the present disclosure does not make specific limitations on this. For example, the first preset table can be as shown in Table 1, and the first preset table can include the correspondence between the blower gear position, the set temperature of the evaporator, the ambient temperature and the number of steps of the first expansion valve.

[0058]

[0059] Table 1 Correspondingly, the other expansion valve may be the second expansion valve. An implementation of step S102 may be: The target coefficient is determined based on the water inlet temperature of the battery system and the actual temperature of the evaporator.

[0060] The target valve opening is determined according to the opening of the first expansion valve and the target coefficient.

[0061] The opening of the second expansion valve is controlled according to the target valve opening.

[0062] For example, the water inlet temperature of the battery system and the actual temperature of the evaporator can be obtained, and the target coefficient can be obtained through a second preset correspondence, wherein the first correspondence can be the correspondence between the water inlet temperature of the battery system, the actual temperature of the evaporator and the target coefficient, and the second preset correspondence can be a second preset table, a second preset function or a second preset model, etc. The first preset table can be as shown in Table 2.

[0063]

[0064] Table 2 In other embodiments, the product of the opening of the first expansion valve and the target coefficient may be used as the target valve opening, and the second expansion valve may be controlled according to the target valve opening.

[0065] In this way, when the vehicle's passenger compartment and battery system have cooling needs at the same time, the opening of the first expansion valve is first controlled according to the blower gear of the passenger compartment, the set temperature of the vehicle's evaporator and the ambient temperature, and then the second expansion valve of the vehicle is dynamically adjusted in combination with the first expansion valve of the passenger compartment, thereby achieving coordinated control of multiple expansion valves and improving the accuracy of valve control.

[0066] Figure 3 is a flow chart of another valve control method according to an exemplary embodiment. Figure 3 As shown, the method also includes: Step S103, controlling the opening of the third expansion valve of the condenser of the vehicle according to the blower gear position of the passenger compartment of the vehicle, the set temperature of the evaporator and the ambient temperature.

[0067] For example, the blower gear of the passenger compartment, the set temperature of the evaporator of the vehicle and the ambient temperature can be obtained, and the opening of the third expansion valve can be obtained through a third preset correspondence, wherein the third preset correspondence can be the correspondence between the blower gear of the passenger compartment, the set temperature of the evaporator of the vehicle, the ambient temperature and the opening of the third expansion valve, the third preset correspondence can be a third preset table, a third preset function or a third preset model, etc., and the third preset table can be, for example, as shown in Table 3.

[0068]

[0069] Table 3 In this way, the control strategy of the third expansion valve no longer simply relies on the fully open or fully closed mode (traditional two-way valve), but can dynamically adjust the opening of the third expansion valve according to the blower gear of the vehicle's passenger compartment, the set temperature of the evaporator and the ambient temperature to dynamically adjust the condenser cooling capacity. This dynamic adjustment method can ensure that the system adjusts the condensation effect according to actual needs, avoids energy waste, and ensures that the temperature in the passenger compartment is stable and comfortable.

[0070] The following provides a specific embodiment to illustrate the control strategy of the passenger compartment, the battery system, and the condenser by taking the first expansion valve as the evaporator EXV (EvapEXV), the second expansion valve as the ChillerEXV, and the third expansion valve as the CondEXV as an example.

[0071] Figure 4 This is a flow chart of the control strategy of the ChillerEXV of a battery system. Figure 4 , the overheat of the battery system can be calculated and a first target overheat threshold can be set, including: an upper limit of overheat ΔT CHILLER(max) and ΔT CHILLER(min) . When the vehicle's thermal management system has no cooling or heating requirements, the default value is used to control the opening of ChillerEXV. When the battery system has a cooling requirement, it is controlled according to the upper limit of the overheating degree. When the passenger compartment and the battery system have cooling requirements at the same time, the opening of ChillerEXV is dynamically adjusted according to the opening of the evaporator EXV. The relevant control method has been described in the above embodiment and will not be repeated here. When the passenger compartment is cooled alone, in order to prevent the refrigerant flow from being too small or cut off due to the evaporator EXV opening being too small, causing system failure, the opening of the evaporator EXV needs to be considered: 1) When the opening of the evaporator EXV is less than the minimum opening, the opening of ChillerEXV is the minimum; 2) When the opening of the evaporator EXV is greater than or equal to the minimum opening, the opening of ChillerEXV is in the closed mode. When the vehicle's thermal management system requires heat pump heating, the opening of ChillerEXV is fully open.

[0072] Figure 5 This is a flow chart of the control strategy of the evaporator EXV of the passenger compartment, refer to Figure 5 , calculate the superheat of the passenger side evaporator and set the second target superheat threshold, including: superheat upper limit ΔT Evap(max) and ΔT Evap (min) . When the vehicle's thermal management system has no cooling or heating requirements, the default value is used to control the opening of EvapEXV. When the battery system has a cooling requirement, in order to prevent the refrigerant flow from being too small or cutoff due to the EvapEXV opening being too small, causing a system failure, the opening of ChillerEXV needs to be considered: 1) When the opening of ChillerEXV is less than the minimum opening, the opening of EvapEXV is the minimum; 2) When the opening of ChillerEXV is greater than or equal to the minimum opening, the opening of ChillerEXV is in closed mode. When the passenger compartment and the battery have cooling requirements at the same time, the opening of EvapEXV can be dynamically adjusted according to the gear of the passenger compartment blower, the set temperature of the evaporator and the ambient temperature. When the passenger compartment is cooled alone, it is controlled according to the upper and lower limits of the superheat. When the vehicle's thermal management system requires heat pump heating, it is controlled according to the upper and lower limits of the superheat.

[0073] Figure 6 This is a flow chart of the control strategy for the condenser CondEXV. Figure 6 When the compressor is working, the following judgments are made: When the thermal management system has no cooling or heating requirements, the default value is used to control the opening of CondEXV. When the passenger compartment or battery system has cooling requirements, CondEXV can be controlled to be fully open. When the thermal management system is in heat pump mode, the opening of CondEXV can be dynamically adjusted according to the gear position of the passenger compartment blower, the set temperature of the evaporator and the ambient temperature.

[0074] In summary, the present disclosure controls the opening of a target expansion valve when there is a cooling demand in the passenger compartment and / or the battery system of the vehicle, wherein the target expansion valve includes the first expansion valve of the passenger compartment or the second expansion valve of the battery system. Then, according to the opening of the target expansion valve, other expansion valves are controlled, wherein the other expansion valve is another valve of the first expansion valve and the second expansion valve other than the target expansion valve. The present disclosure first controls the opening of an expansion valve of the vehicle according to the cooling demand of the vehicle, and then controls another expansion valve according to the opening of the expansion valve, thereby realizing coordinated control of multiple expansion valves and improving the accuracy of valve control.

[0075] Figure 7 is a block diagram of a valve control device according to an exemplary embodiment. Figure 7 As shown, the device 200 includes: The first control module 201 is configured to control the opening of a target expansion valve when a target object in the vehicle has a cooling demand. The target object includes a passenger compartment and / or a battery system of the vehicle, and the target expansion valve includes a first expansion valve in the passenger compartment or a second expansion valve in the battery system.

[0076] The second control module 202 is configured to control other expansion valves according to the opening degree of the target expansion valve, where the other expansion valve is another valve of the first expansion valve and the second expansion valve except the target expansion valve.

[0077] In some embodiments, the target object includes a passenger compartment or a battery system, and the target expansion valve is the expansion valve of the target object. The first control module 201 is configured to: The opening of the target expansion valve is controlled according to the superheat of the target object and the target superheat threshold.

[0078] In some other embodiments, the second control module 202 is configured to: When the opening of the target expansion valve is less than the preset opening threshold, the opening of other expansion valves is controlled according to the designated valve opening. When the opening degree of the target expansion valve is greater than or equal to the preset opening degree threshold, other expansion valves are closed.

[0079] In some other embodiments, the target superheat threshold may be determined by: Get the heat load of the vehicle.

[0080] The target superheat threshold is determined based on the heat load.

[0081] In some other embodiments, determining the target superheat threshold according to the heat load information includes: When the heat load is greater than the preset heat load threshold, the target superheat threshold is increased.

[0082] When the heat load is less than or equal to the preset heat load threshold, the target superheat threshold is reduced.

[0083] In some other embodiments, the target object includes a passenger compartment and a battery system, and the target expansion valve is a first expansion valve. The first control module 201 is configured as follows: The opening of the first expansion valve is controlled according to the blower gear position of the passenger compartment, the set temperature of the evaporator of the vehicle and the ambient temperature.

[0084] In some other embodiments, the other expansion valve is a second expansion valve. The second control module 202 is configured as follows: The target coefficient is determined based on the water inlet temperature of the battery system and the actual temperature of the evaporator.

[0085] The target valve opening is determined according to the opening of the first expansion valve and the target coefficient.

[0086] The opening of the second expansion valve is controlled according to the target valve opening.

[0087] Figure 8 is a block diagram of another valve control device according to an exemplary embodiment. Figure 8 As shown, the device 200 also includes: The third control module 203 is configured to control the opening of the third expansion valve of the condenser of the vehicle according to the blower gear position of the passenger compartment of the vehicle, the set temperature of the evaporator and the ambient temperature.

[0088] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0089] In summary, the present disclosure controls the opening of a target expansion valve when there is a cooling demand in the passenger compartment and / or the battery system of the vehicle, wherein the target expansion valve includes the first expansion valve of the passenger compartment or the second expansion valve of the battery system. Then, according to the opening of the target expansion valve, other expansion valves are controlled, wherein the other expansion valve is another valve of the first expansion valve and the second expansion valve other than the target expansion valve. The present disclosure first controls the opening of an expansion valve of the vehicle according to the cooling demand of the vehicle, and then controls another expansion valve according to the opening of the expansion valve, thereby realizing coordinated control of multiple expansion valves and improving the accuracy of valve control.

[0090] Fig. 9 FIG. 3 is a block diagram of a vehicle 300 according to an exemplary embodiment. Fig. 9 As shown, the vehicle 300 may include: a processor 301 , a memory 302 . The vehicle 300 may also include one or more of a multimedia component 303 , an input / output (I / O) interface 304 , and a communication component 305 .

[0091] The processor 301 is used to control the overall operation of the vehicle 300 to complete all or part of the steps in the above-mentioned valve control method. The memory 302 is used to store various types of data to support the operation of the vehicle 300. For example, these data may include instructions for any application or method used to operate on the vehicle 300, and application-related data, such as contact data, messages sent and received, pictures, audio, video, etc. The memory 302 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk. The multimedia component 303 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 302 or sent through the communication component 305. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 304 provides an interface between the processor 301 and other interface modules, and the above-mentioned other interface modules may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 305 is used for wired or wireless communication between the vehicle 300 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 305 may include: Wi-Fi module, Bluetooth module, NFC module.

[0092] In an exemplary embodiment, the vehicle 300 may be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned valve control method.

[0093] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned valve control method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 302 including program instructions, and the above-mentioned program instructions can be executed by the processor 301 of the vehicle 300 to complete the above-mentioned valve control method.

[0094] In another exemplary embodiment, an electronic device is also provided. The electronic device includes a memory and a processor, wherein the memory can store a computer program, and the processor can be used to execute the computer program in the memory to implement the valve control method shown in the embodiment of the present disclosure.

[0095] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program executable by a processor. When the computer program is executed by the processor, the steps of the above-mentioned valve control method are implemented.

[0096] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0097] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0098] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A valve control method, characterized in that: The method comprises: When a target object in the vehicle has a cooling demand, controlling the opening of a target expansion valve, the target object comprising a passenger compartment and / or a battery system of the vehicle, and the target expansion valve comprising a first expansion valve of the passenger compartment or a second expansion valve of the battery system; According to the opening degree of the target expansion valve, other expansion valves are controlled, where the other expansion valves are another valve of the first expansion valve and the second expansion valve except the target expansion valve.

2. The method according to claim 1, characterized in that The target object includes the passenger compartment or the battery system, the target expansion valve is the expansion valve of the target object; and the control of the opening of the target expansion valve includes: The opening of the target expansion valve is controlled according to the superheat of the target object and the target superheat threshold.

3. The method according to claim 2, characterized in that The controlling of other expansion valves according to the opening of the target expansion valve comprises: When the opening of the target expansion valve is less than a preset opening threshold, the opening of the other expansion valves is controlled according to the designated valve opening; or, When the opening degree of the target expansion valve is greater than or equal to the preset opening degree threshold, the other expansion valves are closed.

4. The method according to claim 2, characterized in that: The target superheat threshold can be determined by: obtaining a heat load of the vehicle; The target superheat threshold is determined according to the heat load.

5. The method according to claim 4, characterized in that Determining the target superheat threshold according to the heat load includes: When the heat load is greater than a preset heat load threshold, increasing the target superheat threshold; When the heat load is less than or equal to the preset heat load threshold, the target superheat threshold is reduced.

6. The method according to claim 1, characterized in that The target object includes the passenger compartment and the battery system, the target expansion valve is the first expansion valve; and the control of the opening of the target expansion valve includes: The opening of the first expansion valve is controlled according to the blower gear position of the passenger compartment, the set temperature of the evaporator of the vehicle and the ambient temperature.

7. The method according to claim 6, characterized in that The other expansion valve is the second expansion valve; and the controlling the other expansion valve according to the opening of the target expansion valve includes: Determining a target coefficient according to the water inlet temperature of the battery system and the actual temperature of the evaporator; determining a target valve opening according to the opening of the first expansion valve and the target coefficient; The opening of the second expansion valve is controlled according to the target valve opening.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: The opening of the third expansion valve of the condenser of the vehicle is controlled according to the blower gear position of the passenger compartment of the vehicle, the set temperature of the evaporator and the ambient temperature.

9. A valve control device, characterized in that: The device comprises: a first control module, configured to control the opening of a target expansion valve when a target object in the vehicle has a cooling demand, the target object comprising a passenger compartment and / or a battery system of the vehicle, the target expansion valve comprising a first expansion valve of the passenger compartment or a second expansion valve of the battery system; The second control module is configured to control other expansion valves according to the opening degree of the target expansion valve, where the other expansion valve is another valve of the first expansion valve and the second expansion valve except the target expansion valve.

10. A vehicle, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 8.

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