A refrigerant circuit control method and device

Abstract

The present application provides a refrigerant circuit control method and device, which includes: when passenger compartment cooling is enabled, opening a passenger compartment cooling solenoid valve in the refrigerant circuit to mechanically control a thermal expansion valve in the refrigerant circuit according to the state of the refrigerant; or when battery cooling is enabled, opening a battery cooling solenoid valve in the refrigerant circuit to mechanically control the thermal expansion valve according to the state of the refrigerant; or when battery cooling is enabled and the passenger compartment requires cooling, opening the passenger compartment cooling solenoid valve; or when passenger compartment cooling is enabled and the battery requires cooling, obtaining an evaporator target temperature and an actual evaporator temperature, and controlling the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the evaporator target temperature and the actual evaporator temperature. This method can balance battery cooling and passenger compartment cooling, avoid the impact of battery cooling on the passenger compartment, and improve the overall vehicle comfort experience.

Description

Technical Field

[0001] The present application relates to the field of thermal management technology, and more specifically, to a refrigerant circuit control method and device. Background Art

[0002] With the increasing popularity of electric vehicles, their performance at high temperatures is attracting increasing attention. In terms of vehicle thermal management, during passenger compartment cooling at high temperatures, the high battery temperature requires cooling. This can cause changes in the refrigerant system's state, leading to the sudden activation of the battery-side cooling circuit, significantly impacting passenger compartment comfort. Existing methods fail to balance battery cooling with passenger compartment cooling, thus reducing overall vehicle comfort. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a refrigerant circuit control method and device that can balance battery cooling and passenger compartment cooling, avoid the impact of battery cooling on the passenger compartment side, and help improve the comfort experience of the entire vehicle.

[0004] A first aspect of an embodiment of the present application provides a refrigerant circuit control method, comprising:

[0005] When passenger compartment cooling is turned on, the passenger compartment side cooling solenoid valve in the refrigerant circuit is turned on, so that the thermal expansion valve in the refrigerant circuit is mechanically controlled according to the state of the refrigerant;

[0006] When battery cooling is turned on, the battery cooling side solenoid valve in the refrigerant circuit is opened so that the thermal expansion valve is mechanically controlled according to the state of the refrigerant;

[0007] When the battery cooling is on and the passenger compartment needs to be cooled, the passenger compartment side cooling solenoid valve is opened;

[0008] When the passenger compartment cooling is turned on and the battery needs to be cooled, the evaporator target temperature and the evaporator actual temperature are obtained, and the passenger compartment side cooling solenoid valve and the battery cooling side solenoid valve are controlled according to the evaporator target temperature and the evaporator actual temperature.

[0009] In the above implementation, the method can, when passenger compartment cooling is enabled, activate the passenger compartment cooling solenoid valve in the refrigerant circuit to mechanically control the thermal expansion valve in the refrigerant circuit based on the refrigerant state; or, when battery cooling is enabled, activate the battery cooling solenoid valve in the refrigerant circuit to mechanically control the thermal expansion valve based on the refrigerant state; or, when battery cooling is enabled and passenger compartment cooling is required, activate the passenger compartment cooling solenoid valve; or, when passenger compartment cooling is enabled and battery cooling is required, obtain the evaporator target temperature and actual evaporator temperature, and control the passenger compartment cooling solenoid valve and the battery cooling solenoid valve based on the evaporator target temperature and actual evaporator temperature. This embodiment balances battery cooling with passenger compartment cooling, avoids the impact of battery cooling on the passenger compartment, and improves the overall vehicle comfort experience.

[0010] Furthermore, controlling the passenger compartment side cooling solenoid valve and the battery cooling side solenoid valve according to the evaporator target temperature and the evaporator actual temperature includes:

[0011] Calculating a temperature difference between the evaporator target temperature and the evaporator actual temperature;

[0012] The passenger compartment side cooling solenoid valve and the battery cooling side solenoid valve are controlled according to the temperature difference and a preset refrigerant solenoid valve on-off strategy.

[0013] Furthermore, the controlling of the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy includes:

[0014] When the temperature difference is greater than a first temperature threshold, that is, when the passenger compartment side is in a temperature reduction stage, the battery cooling side solenoid valve is controlled to be open in a first time period before battery cooling is turned on.

[0015] Furthermore, the controlling of the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy includes:

[0016] When the temperature difference is greater than a second temperature threshold, the battery cooling side solenoid valve is controlled to start and stop periodically according to a first preset start and stop cycle within a second time period before battery cooling is turned on; wherein the second temperature threshold is less than the first temperature threshold.

[0017] Furthermore, the controlling of the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy includes:

[0018] When the temperature difference is greater than a third temperature threshold, the battery cooling side solenoid valve is controlled to start and stop periodically according to a second preset start and stop cycle within a third time period before battery cooling is turned on; wherein the third temperature threshold is less than the second temperature threshold.

[0019] Furthermore, the controlling of the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy includes:

[0020] When the temperature difference is greater than the fourth temperature threshold, that is, the passenger compartment side is already in the cooling stabilization stage, within a fourth time period before the battery cooling is turned on, the battery cooling side solenoid valve is controlled to start and stop periodically according to the third preset start and stop cycle; wherein, the fourth temperature threshold is less than the third temperature threshold.

[0021] A second aspect of an embodiment of the present application provides a refrigerant circuit control device, the refrigerant circuit control device comprising:

[0022] a first opening unit, configured to open the passenger compartment side cooling solenoid valve in the refrigerant circuit when passenger compartment cooling is turned on, so that the control unit mechanically controls the thermal expansion valve in the refrigerant circuit according to the state of the refrigerant;

[0023] a second opening unit, configured to open the battery cooling side solenoid valve in the refrigerant circuit when battery cooling is turned on, so that the control unit mechanically controls the thermal expansion valve according to the state of the refrigerant;

[0024] a third opening unit, configured to open the passenger compartment side cooling solenoid valve when the battery cooling is turned on and the passenger compartment needs to be cooled, so that the control unit mechanically controls the thermal expansion valve according to the state of the refrigerant;

[0025] an acquisition unit, configured to acquire an evaporator target temperature and an evaporator actual temperature when the passenger compartment cooling is on and the battery needs to be cooled;

[0026] The control unit is further configured to control the passenger compartment side cooling solenoid valve and the battery cooling side solenoid valve according to the evaporator target temperature and the evaporator actual temperature.

[0027] In the above implementation process, the device can open the passenger compartment cooling solenoid valve in the refrigerant circuit on the passenger compartment side through the first opening unit when passenger compartment cooling is turned on, so that the control unit can mechanically control the thermal expansion valve in the refrigerant circuit according to the state of the refrigerant; or open the battery cooling solenoid valve in the refrigerant circuit on the battery cooling side through the second opening unit when battery cooling is turned on, so that the control unit can mechanically control the thermal expansion valve according to the state of the refrigerant; or open the passenger compartment cooling solenoid valve on the passenger compartment side through the third opening unit when battery cooling is turned on and passenger compartment cooling is required, so that the control unit can mechanically control the thermal expansion valve according to the state of the refrigerant; or obtain the evaporator target temperature and the evaporator actual temperature through the acquisition unit when passenger compartment cooling is turned on and battery cooling is required; and then control the passenger compartment cooling solenoid valve and the battery cooling solenoid valve based on the evaporator target temperature and the evaporator actual temperature. It can be seen that implementing this embodiment can balance battery cooling and passenger compartment cooling, avoid the impact of battery cooling on the passenger compartment side, and improve the comfort experience of the entire vehicle.

[0028] Furthermore, the control unit includes:

[0029] a calculation subunit, configured to calculate a temperature difference between the evaporator target temperature and the evaporator actual temperature;

[0030] The control subunit is used to control the passenger compartment side cooling solenoid valve and the battery cooling side solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy.

[0031] Furthermore, the control subunit is specifically configured to control the battery cooling side solenoid valve to remain open within a first time period before battery cooling is turned on when the temperature difference is greater than a first temperature threshold, that is, when the passenger compartment side is in a cooling stage.

[0032] Furthermore, the control subunit is specifically used to control the battery cooling side solenoid valve to periodically start and stop according to a first preset start and stop cycle within a second time period before the battery cooling is turned on when the temperature difference is greater than a second temperature threshold; wherein the second temperature threshold is less than the first temperature threshold.

[0033] Furthermore, the control subunit is specifically used to control the battery cooling side solenoid valve to periodically start and stop according to a second preset start and stop cycle within a third time period before the battery cooling is turned on when the temperature difference is greater than a third temperature threshold; wherein the third temperature threshold is less than the second temperature threshold.

[0034] Furthermore, the control subunit is specifically used to control the battery cooling side solenoid valve to periodically start and stop according to a third preset start and stop cycle within a fourth time period before the battery cooling is started when the temperature difference is greater than a fourth temperature threshold, that is, when the passenger compartment side is already in a cooling stabilization stage; wherein, the fourth temperature threshold is less than the third temperature threshold.

[0035] A third aspect of an embodiment of the present application provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the refrigerant circuit control method described in any one of the first aspects of the embodiment of the present application.

[0036] A fourth aspect of an embodiment of the present application provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the refrigerant circuit control method described in any one of the first aspects of the embodiment of the present application is executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A flow chart of a refrigerant circuit control method provided in an embodiment of the present application;

[0039] Figure 2 A schematic structural diagram of a refrigerant circuit control device provided in an embodiment of the present application;

[0040] Figure 3 A schematic diagram of the structure of a refrigerant circuit control provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0042] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0043] Example 1

[0044] Please see Figure 1 , Figure 1 A flow chart of a refrigerant circuit control method is provided for an embodiment of the present application. The refrigerant circuit control method includes:

[0045] S101. Obtain a passenger compartment cooling status and a battery cooling status.

[0046] In this embodiment, the passenger compartment cooling state includes two states: open and closed.

[0047] In this embodiment, the battery cooling state includes two states: on and off.

[0048] In this embodiment, the combination of the passenger compartment cooling state and the battery cooling state includes: the passenger compartment cooling state is turned on, but the battery cooling state is not turned on; the passenger compartment cooling state is not turned on, but the battery cooling state is turned on; the passenger compartment cooling state is turned on first and the battery cooling state is turned on later; the battery cooling state is turned on first and the passenger compartment cooling state is turned on later.

[0049] In this embodiment, the method has the following different refrigerant circuit control modes for different passenger compartment cooling states and battery cooling states:

[0050] When passenger compartment cooling is turned on, the passenger compartment side cooling solenoid valve in the refrigerant circuit is opened so that the thermal expansion valve in the refrigerant circuit is mechanically controlled according to the state of the refrigerant;

[0051] When battery cooling is turned on, the battery cooling side solenoid valve in the refrigerant circuit is opened so that the thermal expansion valve is mechanically controlled according to the state of the refrigerant;

[0052] When the battery cooling is on and the passenger compartment needs to be cooled, the passenger compartment cooling solenoid valve is opened;

[0053] When the passenger compartment cooling is turned on and the battery needs to be cooled, the evaporator target temperature and the evaporator actual temperature are obtained, and the passenger compartment side cooling solenoid valve and the battery cooling side solenoid valve are controlled according to the evaporator target temperature and the evaporator actual temperature.

[0054] S102 : When passenger compartment cooling is on and the battery needs to be cooled, obtain an evaporator target temperature and an evaporator actual temperature.

[0055] S103 , calculating the temperature difference between the evaporator target temperature and the evaporator actual temperature, and triggering the execution of any one of steps S104 to S107 according to the temperature difference.

[0056] In this embodiment, the temperature difference calculation formula is as follows:

[0057] △T_evap=T_evap_act-T_evap_target;

[0058] Among them, T_evap_target is the evaporator target temperature, and T_evap_act is the evaporator actual temperature.

[0059] S104 : When the temperature difference is greater than a first temperature threshold, that is, when the passenger compartment side is in a cooling stage, the battery cooling side solenoid valve is controlled to remain open within a first time period before battery cooling is turned on.

[0060] In this embodiment, this step may specifically be to control the battery cooling side solenoid valve SOV_chiller to be open when ΔT_evap>20, that is, when the passenger compartment side is in the cooling stage, and within t<3 minutes before the battery cooling is turned on.

[0061] S105. When the temperature difference is greater than a second temperature threshold, control the battery cooling side solenoid valve to periodically start and stop according to a first preset start and stop cycle within a second time period before battery cooling is turned on; wherein the second temperature threshold is less than the first temperature threshold.

[0062] In this embodiment, this step may specifically be that when ΔT_evap>10, and within t<3 minutes before the battery cooling is turned on, the battery cooling side solenoid valve SOV_chiller is periodically started and stopped, with the solenoid valve SOV_chiller being opened for 5 seconds and closed for 1 second, and the cycle is continuously performed for 3 minutes;

[0063] S106. When the temperature difference is greater than a third temperature threshold, control the battery cooling side solenoid valve to periodically start and stop according to a second preset start and stop cycle within a third time period before battery cooling is turned on; wherein the third temperature threshold is less than the second temperature threshold.

[0064] In this embodiment, this step may specifically be that when ΔT_evap>5, within t<3 minutes before battery cooling is started, the battery cooling side solenoid valve SOV_chiller is periodically started and stopped, with the solenoid valve SOV_chiller opened for 3 seconds and closed for 3 seconds, and the cycle is continuously executed for 3 minutes.

[0065] S107. When the temperature difference is greater than a fourth temperature threshold, that is, when the passenger compartment side is already in a cooling stabilization stage, control the battery cooling side solenoid valve to periodically start and stop according to a third preset start and stop cycle within a fourth time period before battery cooling is started; wherein the fourth temperature threshold is less than the third temperature threshold.

[0066] In this embodiment, this step can specifically be when △T_evap<3, that is, the passenger compartment side is already in a stable stage. At this time, within t<3min before the battery cooling is turned on, the solenoid valve SOV_chiller on the battery cooling side is periodically started and stopped, with the solenoid valve SOV_chiller opened for 1s and closed for 5s, and the cycle is continuously executed for 3mi.

[0067] In this embodiment, the method is applied to the cooling process of the passenger compartment under high temperature. The battery temperature is high and needs to be cooled. At this time, due to the change in the state of the refrigerant system, the battery side cooling circuit is suddenly opened, which will have a great impact on the comfort of the passenger compartment.

[0068] For example, to prevent the impact of battery cooling on the passenger compartment, this method achieves precise refrigerant control by frequently switching the refrigerant solenoid valve on and off. The switching frequency can be differentiated based on the evaporator temperature.

[0069] Specifically, at the battery cooling start time t==0s, the judgment is made as follows:

[0070] ① When △T_evap>20, that is, the passenger compartment side is in the cooling stage, and t<3min before the battery cooling is turned on, the battery cooling side solenoid valve SOV_chiller is always open;

[0071] ② When △T_evap>10, and t<3min before the battery cooling starts, the battery cooling side solenoid valve SOV_chiller is periodically started and stopped, with the solenoid valve SOV_chiller open for 5s and closed for 1s, and the cycle lasts for 3min;

[0072] ③ When △T_evap>5, and t<3min before the battery cooling starts, the battery cooling side solenoid valve SOV_chiller starts and stops periodically, with the solenoid valve SOV_chiller opening for 3s and closing for 3s, and the cycle continues for 3min;

[0073] ④ When △T_evap<3, that is, the passenger compartment side is already in a stable stage, at this time, before the battery cooling is turned on, the solenoid valve SOV_chiller on the battery cooling side is periodically started and stopped within t<3min, with the solenoid valve SOV_chiller opened for 1s and closed for 5s, and the cycle lasts for 3min.

[0074] In this embodiment, the execution subject of the method may be a computing device such as a computer or a server, and this is not limited in this embodiment.

[0075] In this embodiment, the execution subject of the method may also be a smart device such as a smart phone, a tablet computer, etc., which is not limited in this embodiment.

[0076] It can be seen that the implementation of the refrigerant circuit control method described in this embodiment can avoid the impact of the battery cooling on the passenger compartment side, and realize the change of the refrigerant flow under different double-evaporation systems by controlling the on-off time of the refrigerant solenoid valve, thereby achieving precise control of the refrigerant flow, thereby achieving the same effect as the electronic expansion valve system, so that users do not feel the impact of the temperature change in the car, and various impacts are reduced to a minimum.

[0077] Example 2

[0078] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of a refrigerant circuit control device provided in an embodiment of the present application. Figure 2 As shown, the refrigerant circuit control device includes:

[0079] The first opening unit 210 is used to open the passenger compartment side cooling solenoid valve in the refrigerant circuit when the passenger compartment cooling is turned on, so that the control unit 250 can mechanically control the thermal expansion valve in the refrigerant circuit according to the state of the refrigerant;

[0080] The second opening unit 220 is used to open the battery cooling side solenoid valve in the refrigerant circuit when the battery cooling is turned on, so that the control unit 250 can mechanically control the thermal expansion valve according to the state of the refrigerant;

[0081] The third opening unit 230 is used to open the passenger compartment cooling solenoid valve when the battery cooling is turned on and the passenger compartment needs to be cooled, so that the control unit 250 can mechanically control the thermal expansion valve according to the state of the refrigerant;

[0082] An acquisition unit 240 is configured to acquire an evaporator target temperature and an evaporator actual temperature when the passenger compartment cooling is turned on and the battery needs to be cooled;

[0083] The control unit 250 is further configured to control the passenger compartment side cooling solenoid valve and the battery cooling side solenoid valve according to the evaporator target temperature and the evaporator actual temperature.

[0084] As an optional implementation, the control unit 250 includes:

[0085] A calculation subunit 251 is used to calculate the temperature difference between the evaporator target temperature and the evaporator actual temperature;

[0086] The control subunit 252 is used to control the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and the preset refrigerant solenoid valve on-off strategy.

[0087] As an optional embodiment, the control subunit 252 is specifically used to control the battery cooling side solenoid valve to be open all the time within a first time period before the battery cooling is turned on when the temperature difference is greater than the first temperature threshold, that is, when the passenger compartment side is in the cooling stage.

[0088] As an optional embodiment, the control subunit 252 is specifically used to control the battery cooling side solenoid valve to periodically start and stop according to a first preset start and stop cycle within a second time period before the battery cooling is turned on when the temperature difference is greater than a second temperature threshold; wherein the second temperature threshold is less than the first temperature threshold.

[0089] As an optional embodiment, the control subunit 252 is specifically used to control the battery cooling side solenoid valve to periodically start and stop according to a second preset start and stop cycle within a third time period before the battery cooling is turned on when the temperature difference is greater than a third temperature threshold; wherein the third temperature threshold is less than the second temperature threshold.

[0090] As an optional embodiment, the control subunit 252 is further used to control the solenoid valve on the battery cooling side to start and stop periodically according to the third preset start and stop cycle within a fourth time period before the battery cooling is started when the temperature difference is greater than a fourth temperature threshold, that is, when the passenger compartment side is already in a cooling stabilization stage; wherein the fourth temperature threshold is less than the third temperature threshold.

[0091] Please see Figure 3 , Figure 3 The following is a schematic diagram of the structure of a refrigerant circuit. The components in the refrigerant circuit are described as follows:

[0092] ① Compressor: provides power source for the refrigeration system;

[0093] ② Battery Chiller: A heat exchanger that, when coupled to the air conditioning system, exchanges heat between the refrigerant and the coolant to cool the battery.

[0094] ③Condenser: converts gaseous refrigerant into liquid and transfers heat to the air for heat release;

[0095] ④ Evaporator: Low-temperature liquid refrigerant passes through the evaporator to exchange heat with the air inside the car, vaporizes and absorbs heat to achieve the cooling effect;

[0096] ⑤Solenoid valve on the battery cooling side: SOV is an electrically controlled valve (normally open) that switches the refrigerant on and off on the battery cooling side;

[0097] ⑥ Evaporator side solenoid valve: SOV is an electrically controlled valve (normally open type) that switches the refrigerant on and off on the evaporator side;

[0098] ⑦Battery cooling side thermal expansion valve: TXV adaptively adjusts the refrigerant flow through the battery cooler based on the superheat;

[0099] ⑧Evaporator-side thermal expansion valve: TXV adaptively adjusts the refrigerant flow through the evaporator based on the superheat;

[0100] ⑨Refrigerant pipeline: connects all components in the refrigerant circuit to realize the flow of refrigerant in the entire system and thus realize the refrigeration function.

[0101] In this embodiment, the explanation of the refrigerant circuit control device can refer to the description in Example 1, and will not be further elaborated in this embodiment.

[0102] It can be seen that the implementation of the refrigerant circuit control device described in this embodiment can avoid the impact of the battery cooling on the passenger compartment side, and realize the change of the refrigerant flow under different double-evaporation systems by controlling the on-off time of the refrigerant solenoid valve, thereby achieving precise control of the refrigerant flow, thereby achieving the same effect as the electronic expansion valve system, so that users cannot feel the impact of the temperature change in the car, and various impacts are reduced to a minimum.

[0103] An embodiment of the present application provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the refrigerant circuit control method in Example 1 of the present application.

[0104] An embodiment of the present application provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the refrigerant circuit control method in embodiment 1 of the present application is executed.

[0105] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes 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 box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0106] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0107] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0108] The foregoing is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

[0109] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

[0110] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. A refrigerant circuit control method, characterized in that: A battery cooler is provided on the battery cooling side, and an evaporator is provided on the passenger compartment side. The method includes: When passenger compartment cooling is turned on, the passenger compartment side cooling solenoid valve in the refrigerant circuit is turned on, so that the thermal expansion valve in the refrigerant circuit is mechanically controlled according to the state of the refrigerant; When battery cooling is turned on, the battery cooling side solenoid valve in the refrigerant circuit is opened so that the thermal expansion valve is mechanically controlled according to the state of the refrigerant; When the battery cooling is on and the passenger compartment needs to be cooled, the passenger compartment side cooling solenoid valve is opened; When the passenger compartment cooling is on and the battery needs to be cooled, the evaporator target temperature and the evaporator actual temperature are obtained, and the passenger compartment cooling solenoid valve and the battery cooling solenoid valve are controlled according to the evaporator target temperature and the evaporator actual temperature; The controlling of the passenger compartment side cooling solenoid valve and the battery cooling side solenoid valve according to the evaporator target temperature and the evaporator actual temperature includes: Calculating a temperature difference between the evaporator target temperature and the evaporator actual temperature; Controlling the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy; The controlling of the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy includes: When the temperature difference is greater than a first temperature threshold, that is, when the passenger compartment side is in a cooling stage, the battery cooling side solenoid valve is controlled to be open in a first time period before battery cooling is turned on; The controlling of the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy includes: When the temperature difference is greater than the second temperature threshold and less than or equal to the first temperature threshold, the battery cooling side solenoid valve is controlled to start and stop periodically according to a first preset start and stop cycle within a second time period before the battery cooling is turned on; wherein the second temperature threshold is less than the first temperature threshold.

2. The refrigerant circuit control method according to claim 1, characterized in that: The controlling of the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy includes: When the temperature difference is greater than a third temperature threshold and less than or equal to a second temperature threshold, the battery cooling side solenoid valve is controlled to start and stop periodically according to a second preset start and stop cycle within a third time period before battery cooling is turned on; wherein, the third temperature threshold is less than the second temperature threshold.

3. The refrigerant circuit control method according to claim 2, characterized in that: The controlling of the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy includes: When the temperature difference is less than a fourth temperature threshold, that is, when the passenger compartment side is already in a cooling stabilization stage, the battery cooling side solenoid valve is controlled to start and stop periodically according to a third preset start and stop cycle within a fourth time period before battery cooling is turned on; wherein, the fourth temperature threshold is less than the third temperature threshold.

4. A refrigerant circuit control device, characterized in that: The refrigerant circuit control device is provided with a battery cooler on the battery cooling side and an evaporator on the passenger compartment side. The refrigerant circuit control device includes: a first opening unit, configured to open the passenger compartment side cooling solenoid valve in the refrigerant circuit when passenger compartment cooling is turned on, so that the control unit mechanically controls the thermal expansion valve in the refrigerant circuit according to the state of the refrigerant; a second opening unit, configured to open the battery cooling side solenoid valve in the refrigerant circuit when battery cooling is turned on, so that the control unit mechanically controls the thermal expansion valve according to the state of the refrigerant; a third opening unit, configured to open the passenger compartment side cooling solenoid valve when the battery cooling is turned on and the passenger compartment needs to be cooled, so that the control unit mechanically controls the thermal expansion valve according to the state of the refrigerant; an acquisition unit, configured to acquire an evaporator target temperature and an evaporator actual temperature when the passenger compartment cooling is on and the battery needs to be cooled; The control unit is further configured to control the passenger compartment side cooling solenoid valve and the battery cooling side solenoid valve according to the evaporator target temperature and the evaporator actual temperature; Wherein, the control unit includes: a calculation subunit, configured to calculate a temperature difference between the evaporator target temperature and the evaporator actual temperature; a control subunit, configured to control the passenger compartment cooling solenoid valve and the battery cooling solenoid valve according to the temperature difference and a preset refrigerant solenoid valve on-off strategy; The control subunit is specifically configured to control the battery cooling side solenoid valve to remain open within a first time period before the battery cooling is turned on when the temperature difference is greater than a first temperature threshold, that is, when the passenger compartment side is in a cooling stage; Among them, the control subunit is specifically used to control the battery cooling side solenoid valve to periodically start and stop according to the first preset start and stop cycle within a second time period before the battery cooling is turned on when the temperature difference is greater than the second temperature threshold and less than or equal to the first temperature threshold; wherein the second temperature threshold is less than the first temperature threshold.

5. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the refrigerant circuit control method according to any one of claims 1 to 3.

6. A readable storage medium, characterized in that: The readable storage medium stores computer program instructions, and when the computer program instructions are read and executed by a processor, the refrigerant circuit control method according to any one of claims 1 to 3 is executed.

Images