Vehicle, control method for thermal management system thereof, apparatus and storage medium

Abstract

A vehicle (400), a control method for a thermal management system thereof, an apparatus and a storage medium. The thermal management system of the vehicle comprises a cooling liquid circulation system (100) and an air conditioning system (200); the air conditioning system (200) comprises a compressor (8), a fresh air regulation assembly, a heat exchanger (4) and an air blower; the cooling liquid circulation system (100) comprises a heat exchanger (4) and a fan (13) provided corresponding to a heat dissipation assembly (1); the air conditioning system (200) and the cooling liquid circulation system (100) exchange heat by means of the heat exchangers (4). The method comprises: acquiring the discharge pressure of the compressor (8); and when it is determined that the discharge pressure of the compressor (8) exceeds a preset pressure threshold value, adjusting one or more of operating parameters of the compressor (8), the fresh air regulation assembly, the air blower and the fan (13), such that the discharge pressure of the compressor (8) is lower than the preset pressure threshold value. When a high-pressure protection function is triggered, by means of multiple measures or a combination of multiple measures, the control method achieves effective protection of system operation while satisfying the comfort requirements of passengers.

Description

Control method, device and storage medium for vehicle and thermal management system thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202311453065.7, filed on November 2, 2023, entitled “Control method, device and storage medium for vehicle and thermal management system thereof,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of vehicle technology, and in particular to a control method, device, and storage medium for a vehicle and a thermal management system thereof. Background Art

[0004] PTC (Positive Temperature Coefficient) heaters are widely used due to their flexible heat regulation. However, to simplify system architecture and reduce system costs, eliminating PTC heaters has become an optimization option. However, eliminating PTC heaters can easily lead to high-voltage protection in the thermal management system, impacting normal system operation.

[0005] Public content

[0006] In view of the above problems, the present disclosure provides a control method, device and storage medium for a vehicle and its thermal management system. When the high-voltage protection function is triggered, effective protection of the system operation is achieved through multiple measures or a combination of multiple measures, while meeting the comfort needs of passengers.

[0007] In a first aspect, the present disclosure provides a control method for a vehicle thermal management system. The vehicle thermal management system may include a coolant circulation system and an air-conditioning system. The air-conditioning system may include a compressor, a fresh air conditioning component, a heat exchanger and a blower. The coolant circulation system includes a heat exchanger and a fan arranged corresponding to the heat dissipation component. The air-conditioning system and the coolant circulation system exchange heat through the heat exchanger. The method includes: obtaining the exhaust pressure of the compressor; when it is determined that the exhaust pressure of the compressor exceeds a preset pressure threshold, adjusting one or more of the operating parameters of the compressor, the fresh air conditioning component, the blower, and the fan to make the exhaust pressure of the compressor lower than the preset pressure threshold.

[0008] In the technical solution of the embodiment of the present disclosure, the exhaust pressure of the compressor is obtained in real time. When it is determined that the exhaust pressure of the compressor exceeds the preset pressure threshold, it means that the high-pressure protection function is triggered. At this time, one or more of the operating parameters of the compressor, the fresh air adjustment component, the blower, and the fan are adjusted. For example, the operating frequency or operating speed of the compressor is adjusted. For example, the operating parameters of the compressor and the fresh air adjustment component are adjusted. For example, the fan is adjusted in a combination of multiple ways or performed separately to reduce the exhaust pressure of the compressor so that the exhaust pressure of the compressor is less than the preset pressure threshold, thereby achieving effective protection of the system operation and meeting the comfort needs of the passengers.

[0009] In some embodiments, the compressor operating parameters include the compressor operating speed. Adjusting the compressor operating parameters includes reducing the compressor operating speed until the compressor discharge pressure falls below a preset pressure threshold, or the compressor operating speed is less than or equal to a first preset speed. By reducing the compressor operating speed, the compressor discharge pressure is reduced, thereby effectively protecting system operation while meeting passenger comfort requirements.

[0010] In some embodiments, adjusting the fresh air conditioning assembly includes increasing the external circulation ratio of the fresh air conditioning assembly when the air conditioning system is in automatic control. Increasing the external circulation ratio reduces the exhaust pressure of the system, thereby allowing the air conditioning system to operate safely within reasonable operating boundaries.

[0011] In some embodiments, adjusting the fresh air conditioning assembly further includes increasing the external circulation ratio of the fresh air conditioning assembly when the air conditioning system is in a non-automatic control state and the fresh air conditioning assembly is in an automatic control state. By increasing the external circulation ratio, the inlet air temperature and the exhaust air pressure are reduced, thereby ensuring that the air conditioner operates safely within reasonable operating boundaries.

[0012] In some embodiments, adjusting the blower includes increasing the blower's air volume when the air conditioning system is in automatic control, or when the air conditioning system is in a non-automatic control state and the blower is in automatic control. By increasing the blower's air volume, the compressor's exhaust pressure is reduced, thereby ensuring that the air conditioner operates safely within reasonable operating boundaries.

[0013] In some embodiments, the coolant circulation system further includes a solenoid valve provided at the output end of the warm core water pump, the solenoid valve being used to regulate the flow of coolant flowing into the heat dissipation component, and the above method further includes: adjusting the opening of the solenoid valve.

[0014] In some embodiments, adjusting the solenoid valve includes increasing the opening of the solenoid valve to increase the coolant flow into the heat dissipation assembly. By increasing the opening of the solenoid valve, more hot water is dissipated into the environment through the lower thermal radiator (LTR) of the heat dissipation assembly. This passively increases the compressor speed while maintaining a constant outlet air temperature, ensuring safe operation of the air conditioner within reasonable operating boundaries.

[0015] In some embodiments, the vehicle thermal management system control method further includes increasing the blower's airflow when the solenoid valve opening reaches a preset opening threshold and the blower is in a non-automatic control state. If the system is still operating outside the high-pressure boundary after the solenoid valve opening is adjusted to the preset opening threshold, the blower's airflow is appropriately increased to reduce the exhaust pressure for safe system operation, thereby ensuring safe operation of the air conditioner within reasonable operating boundaries.

[0016] In some embodiments, adjusting the fan includes increasing the fan speed. By increasing the fan speed, more heat is dissipated into the environment through the heat sink assembly (LTR). This allows the compressor speed to be passively increased while maintaining a constant outlet air temperature, allowing the air conditioner to operate safely within reasonable operating boundaries.

[0017] In some embodiments, the vehicle thermal management system control method further includes lowering the target outlet air temperature of the air conditioning system. If manual control requests from passengers cannot be prioritized, lowering the target outlet air temperature of the air conditioning system ensures safe operation within reasonable operating boundaries.

[0018] In some embodiments, the vehicle thermal management system control method further includes determining that the blower position is a preset position and that the target air outlet temperature of the air conditioning system is greater than the preset air outlet temperature. When utilizing a compressor to meet a low heating demand, multiple measures or combinations thereof are employed to effectively protect system operation while maximizing passenger comfort.

[0019] In second aspect, the present disclosure provides a control device for a vehicle thermal management system, wherein the vehicle thermal management system includes a coolant circulation system and an air-conditioning system, the air-conditioning system includes a compressor, a fresh air conditioning component, a heat exchanger and a blower, the coolant circulation system includes a heat exchanger and a fan arranged corresponding to the heat dissipation component, the air-conditioning system and the coolant circulation system exchange heat through the heat exchanger, and the device includes: an acquisition module for acquiring the exhaust pressure of the compressor; a control module for adjusting one or more of the operating parameters of the compressor, the fresh air conditioning component, the blower, and the fan when it is determined that the exhaust pressure of the compressor exceeds a preset pressure threshold, so that the exhaust pressure of the compressor is lower than the preset pressure threshold.

[0020] In the technical solution of the embodiment of the present disclosure, the exhaust pressure of the compressor is obtained in real time through the acquisition module. When it is determined that the exhaust pressure of the compressor exceeds the preset pressure threshold, it indicates that the high-pressure protection function is triggered. At this time, the control module adjusts one or more of the operating parameters of the compressor, the fresh air adjustment component, the blower, and the fan. For example, the operating frequency or operating speed of the compressor is adjusted, or the operating parameters of the compressor and the fresh air adjustment component are adjusted, or the fan is adjusted in a combination of multiple ways, or performed separately, to reduce the exhaust pressure of the compressor so that the exhaust pressure of the compressor is less than the preset pressure threshold, thereby achieving effective protection of the system operation and meeting the comfort needs of the passengers.

[0021] In a third aspect, the present disclosure provides a computer-readable storage medium storing a control program for a vehicle thermal management system. When the control program for the vehicle thermal management system is executed by a processor, the control method for the vehicle thermal management system is implemented.

[0022] In a fourth aspect, the present disclosure provides a vehicle comprising a memory, a processor, and a control program for a vehicle thermal management system stored in the memory and executable on the processor. When the processor executes the control program for the vehicle thermal management system, the above-mentioned control method for the vehicle thermal management system is implemented.

[0023] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0025] FIG1 is a flow chart of a control method of a vehicle thermal management system according to some embodiments of the present disclosure;

[0026] FIG2 is a block diagram of a vehicle thermal management system according to some embodiments of the present disclosure;

[0027] FIG3 is a flow chart of a control method of a vehicle thermal management system according to some embodiments of the present disclosure;

[0028] FIG4 is a block diagram of a vehicle thermal management system according to some embodiments of the present disclosure;

[0029] FIG5 is a flow chart of a control method of a vehicle thermal management system according to some embodiments of the present disclosure;

[0030] FIG6 is a block diagram of a control device of a vehicle thermal management system according to some embodiments of the present disclosure;

[0031] FIG7 is a block diagram of a vehicle according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the present disclosure are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present disclosure and are therefore only examples and are not intended to limit the scope of protection of the present disclosure.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the terms "including" and "having" and any variations thereof in the specification and claims of the present disclosure and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0034] In the description of the embodiments of the present disclosure, technical terms such as "first" and "second" are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0035] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In the description of the embodiments of the present disclosure, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0037] In the description of the embodiments of the present disclosure, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0038] In the description of the embodiments of the present disclosure, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present disclosure.

[0039] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0040] The current vehicle thermal management system directly adjusts the fan speed to reduce the exhaust pressure and exhaust temperature of the system when high-voltage protection occurs. Although the processing method is relatively simple, it can solve the problem of triggering the high-voltage protection function. However, in order to simplify the system architecture and reduce system costs, the elimination of PTC heaters has become an optimization direction. Since PTC heaters are more flexible in regulating heat, they are widely used. However, after the PTC heaters are eliminated, for some working conditions, such as using compressors to achieve small heating requirements, high-voltage protection is likely to occur, affecting the normal operation of the system. Therefore, after the PTC heaters are eliminated, how to use compressors to achieve small heating requirements, especially the control of low air volume and high air temperature scenarios has become a prominent problem facing the automotive thermal management industry.

[0041] This disclosure addresses the thermal management system for vehicles without PTC heating. When high-voltage protection is triggered, the system effectively protects system operation through a combination of various measures, while maximizing passenger comfort. For example, the system proactively increases the proportion of fresh air. Alternatively, if the compressor protection boundary is still exceeded, the three-way water valve opening is adjusted to increase external heat dissipation, thereby passively increasing the compressor speed to keep the system within the protection range. Alternatively, if the compressor protection boundary is still exceeded or the compressor speed is too high, the air volume corresponding to the low-speed wind is passively increased. By increasing the air volume, the air temperature is reduced, thereby reducing the compressor speed. Various other measures are employed.

[0042] For the convenience of description, the following embodiment describes the control method of the vehicle thermal management system disclosed in the present invention with reference to FIG1 .

[0043] 1 , the control method of the vehicle thermal management system of the present disclosure may include the following steps:

[0044] S101, obtaining the exhaust pressure of the compressor. The exhaust pressure of the compressor can be obtained by a pressure sensor provided at the exhaust port of the compressor.

[0045] S102: If it is determined that the exhaust pressure of the compressor exceeds a preset pressure threshold, one or more of the following are adjusted: operating parameters of the compressor, a fresh air conditioning component, a blower, and a fan, so that the exhaust pressure of the compressor is lower than the preset pressure threshold. The preset pressure threshold may be calibrated based on actual conditions. For example, the preset pressure threshold may be the maximum pressure value allowed by the compressor.

[0046] Specifically, the exhaust pressure of the compressor is obtained in real time. When it is determined that the exhaust pressure of the compressor exceeds the preset pressure threshold, it means that the high-pressure protection function has been triggered. At this time, one or more of the operating parameters of the compressor, the fresh air adjustment component, the blower, and the fan are adjusted. For example, the operating frequency or operating speed of the compressor is adjusted, or the operating parameters of the compressor and the fresh air adjustment component are adjusted, or the fan is adjusted in a combination of multiple ways or individually, so as to reduce the exhaust pressure of the compressor so that the exhaust pressure of the compressor is less than the preset pressure threshold, thereby achieving effective protection of the system operation and meeting the comfort needs of the passengers.

[0047] For example, after the air conditioning system is started, the compressor's exhaust pressure is monitored in real time. When the compressor's exhaust pressure does not trigger the high-pressure boundary, the air conditioning system is controlled to operate safely within reasonable operating boundaries. When the compressor's exhaust pressure triggers the high-pressure boundary, the compressor's operating speed can be reduced to reduce the compressor's exhaust pressure until the compressor's exhaust pressure no longer triggers the high-pressure boundary. Alternatively, when the compressor's exhaust pressure exceeds a preset pressure threshold, the adjustment ratio of the fresh air conditioning component is adjusted to increase the mixing ratio of fresh air from outside and inside the vehicle. Alternatively, when the compressor's exhaust pressure exceeds a preset pressure threshold, the blower's air volume (the blower of the air conditioning system) is adjusted to increase the blower's air volume. Alternatively, when the compressor's exhaust pressure exceeds a preset pressure threshold, the fan's speed is adjusted to increase the fan's speed, allowing more hot water to be dissipated into the environment through the heat dissipation component, passively increasing the compressor's operating speed and reducing the compressor's exhaust pressure. Alternatively, by combining multiple of the above measures to reduce the compressor's exhaust pressure, while prioritizing the passengers' manual control needs, the system's operation is effectively protected while meeting the passengers' comfort needs.

[0048] In some embodiments, the operating parameters of the compressor include the operating speed of the compressor. Adjusting the operating parameters of the compressor includes reducing the operating speed of the compressor until the exhaust pressure of the compressor is lower than a preset pressure threshold, or the operating speed of the compressor is less than or equal to a first preset speed. The first preset speed can be calibrated based on actual conditions. For example, the first preset speed can be the lowest operating speed allowed by the compressor.

[0049] Specifically, when it is detected that the exhaust pressure of the compressor exceeds a preset pressure threshold, the exhaust pressure of the compressor is reduced by reducing the operating speed of the compressor. For example, the operating speed of the compressor is reduced at a certain reduction rate until the exhaust pressure of the compressor is lower than the preset pressure threshold. When the operating speed of the compressor is reduced to the minimum operating speed, if the exhaust pressure of the compressor still exceeds the preset pressure threshold, other methods are used to reduce the exhaust pressure of the compressor, for example, one or more of the fresh air adjustment component, the blower, and the fan are adjusted, thereby achieving effective protection of the system operation and meeting the comfort needs of the passengers.

[0050] It should be noted that the operating parameters of the compressor may also include the operating frequency. When the high-pressure protection is triggered, the exhaust pressure of the compressor can be reduced by reducing the operating frequency of the compressor. However, if the compressor is frequently started and stopped, it will reduce the comfort of the user.

[0051] In some embodiments, adjusting the fresh air conditioning component includes: increasing the external circulation ratio of the fresh air conditioning component when the air conditioning system is in automatic control state.

[0052] Specifically, when it is detected that the exhaust pressure of the compressor exceeds the preset pressure threshold, the air conditioning system is checked to see if it is in automatic control. If it is, the external circulation ratio of the fresh air conditioning component is increased, that is, the proportion of air entering the vehicle from outside is increased, for example, by increasing the opening of the fresh air conditioning component to increase the outdoor air entering the vehicle. When the fresh air conditioning component is already in full external circulation, if the exhaust pressure of the compressor still exceeds the preset pressure threshold, other methods are used to reduce the exhaust pressure of the compressor, for example, by adjusting one or more of the operating speed of the compressor, the blower, or the fan.

[0053] In addition, when it is detected that the exhaust pressure of the compressor exceeds the preset pressure threshold, the operating speed of the compressor can be reduced first to reduce the exhaust pressure of the compressor. When the operating speed of the compressor is reduced to the first preset speed, the exhaust pressure of the compressor still exceeds the preset pressure threshold. At this time, the fresh air adjustment component can be controlled when the air-conditioning system is in an automatic control operation state. When the fresh air adjustment component is already in a full external circulation state, if the exhaust pressure of the compressor still exceeds the preset pressure threshold, other methods are used to reduce the exhaust pressure of the compressor, for example, one or more of the blower and fan are adjusted. In this way, the exhaust pressure of the system can be reduced by increasing the air output of the air-conditioning system or increasing the external circulation ratio, so that the air conditioner can operate safely within a reasonable operating boundary.

[0054] It should be noted that the air conditioning system being in automatic control state means that the air conditioning system can automatically adjust the air outlet temperature, air volume, etc.

[0055] In some embodiments, adjusting the fresh air conditioning component further includes: when the air conditioning system is in a non-automatic control state and the fresh air conditioning component is in an automatic control state, increasing the external circulation ratio of the fresh air conditioning component.

[0056] Specifically, when it is detected that the exhaust pressure of the compressor exceeds the preset pressure threshold, it is detected whether the air-conditioning system is in an automatic control state. If the air-conditioning system is in a non-automatic control state (manual control state), it is further determined whether the fresh air adjustment component is in an automatic control state. Among them, when the fresh air adjustment component is in an automatic control state, the external circulation ratio is increased, the inlet air temperature is reduced, and the exhaust pressure is reduced, so that the air conditioner can operate safely within a reasonable operating boundary, while also reducing the perception of the air output of the air conditioning system. When the fresh air adjustment component is already in a full external circulation state, if the exhaust pressure of the compressor still exceeds the preset pressure threshold, other methods are used to reduce the exhaust pressure of the compressor, for example, adjusting the operating speed of the compressor, one or more of the blower and the fan; for example, adjusting one or more of the blower and the fan.

[0057] When the fresh air conditioning component is not in automatic control, the fresh air conditioning component is not adjusted, and other methods are used to reduce the compressor's exhaust pressure. For example, one or more of the blower and fan are adjusted; another example is adjusting the operating speed of the compressor, the blower, or the fan. This increases the external circulation ratio, reduces the inlet air temperature, and reduces the exhaust pressure, thereby ensuring that the air conditioner operates safely within reasonable operating boundaries.

[0058] In some embodiments, adjusting the blower includes increasing the air output of the blower when the air conditioning system is in an automatic control state, or when the air conditioning system is in a non-automatic control state and the blower is in an automatic control state.

[0059] Specifically, when it is detected that the exhaust pressure of the compressor exceeds the preset pressure threshold, it is detected whether the control system is in an automatic control state. If the air-conditioning system is in an automatic control state, the air-conditioning system automatically controls the air output of the blower, for example, the air output of the blower is increased. If the air-conditioning system is in a non-automatic control state, it is further detected whether the blower (such as a blower) is in an automatic control state. If the blower is in an automatic control state, the air output of the blower is increased, and the exhaust pressure of the compressor is reduced, so that the air conditioner operates safely within a reasonable operating boundary. Among them, when the air output of the blower reaches the maximum air output, the exhaust pressure of the compressor still exceeds the preset pressure threshold, then other methods are used to reduce the exhaust pressure of the compressor, for example, one or more of the operating speed of the compressor, the fresh air adjustment component, and the fan are adjusted, so as to achieve effective protection of the system operation while meeting the comfort needs of the passengers.

[0060] When the blower is in a non-automatic control state, other methods are used to reduce the exhaust pressure of the compressor, for example, one or more of the operating speed of the compressor, the fresh air adjustment component, and the fan are adjusted.

[0061] In addition, when it is detected that the compressor's exhaust pressure exceeds a preset pressure threshold, the system can first control one or more of the compressor's operating speed and the fresh air adjustment component before adjusting the blower. If the compressor's exhaust pressure still exceeds the preset pressure threshold when the blower's air output reaches its maximum output, or if the blower is not in automatic operation, other methods can be used to reduce the compressor's exhaust pressure, such as adjusting the fan.

[0062] In some embodiments, the coolant circulation system may further include a solenoid valve provided at the output end of the warm core water pump, the solenoid valve being used to regulate the flow of coolant flowing into the heat dissipation component. The above method further includes: adjusting the opening of the solenoid valve.

[0063] Furthermore, in some embodiments, adjusting the solenoid valve includes increasing the opening of the solenoid valve to increase the flow of coolant flowing into the heat dissipation component. The solenoid valve may be a three-way valve (three-way water valve).

[0064] Specifically, when it is detected that the exhaust pressure of the compressor exceeds the preset pressure threshold, the opening of the solenoid valve is adjusted to increase the coolant flowing through the heat dissipation component LTR, so that more hot water is lost to the environment through the heat dissipation component LTR. As a result, while maintaining the outlet air temperature, the speed of the compressor is passively increased, reducing the exhaust pressure of the compressor, so that the compressor operates safely within a reasonable operating boundary. When the opening of the solenoid valve reaches the maximum opening, if the exhaust pressure of the compressor still exceeds the preset pressure threshold, other methods are used to reduce the exhaust pressure of the compressor, for example, by adjusting one or more of the operating speed of the compressor, the fresh air adjustment component, the blower, and the fan, thereby achieving effective protection of the system operation while meeting the comfort needs of the passengers.

[0065] Furthermore, upon detecting that the compressor's exhaust pressure exceeds a preset pressure threshold, the system can first control one or more of the compressor's operating speed, the fresh air adjustment component, and the blower, before adjusting the solenoid valve. If the compressor's exhaust pressure still exceeds the preset pressure threshold when the solenoid valve reaches its maximum opening, other measures can be used to reduce the compressor's exhaust pressure, such as adjusting the fan.

[0066] In some embodiments, the vehicle thermal management system control method further includes increasing the blower's airflow when the solenoid valve opening reaches a preset opening threshold and the blower is in a non-automatic control state. The preset opening threshold can be calibrated based on actual conditions, for example, the maximum opening allowed by the solenoid valve.

[0067] Specifically, when adjusting the opening of the solenoid valve, if the opening of the solenoid valve reaches a preset opening threshold, the blower's air volume is passively increased. Even if the blower is in a non-automatic control state (manual state) at this time, for the safe operation of the system, the blower's air volume is appropriately increased to reduce the exhaust pressure, thereby allowing the compressor to operate safely within a reasonable operating boundary. If, after passively increasing the blower's air volume, the compressor's exhaust pressure still exceeds the preset pressure threshold, other methods are used to reduce the compressor's exhaust pressure, for example, by lowering the target air outlet temperature of the air conditioning system.

[0068] In some embodiments, adjusting the fan includes increasing the operating speed of the fan.

[0069] Specifically, when it is detected that the compressor exhaust pressure exceeds the preset pressure threshold, the fan speed is adjusted to increase the fan speed so that more heat is dissipated into the environment through the heat dissipation component LTR. This allows the compressor speed to be passively increased while maintaining the outlet air temperature, allowing the air conditioner to operate safely within reasonable operating boundaries. If the compressor exhaust pressure still exceeds the preset pressure threshold when the fan speed is adjusted to the maximum value, other methods are used to reduce the compressor exhaust pressure. For example, one or more of the compressor speed, fresh air adjustment component, blower, and solenoid valve are adjusted to effectively protect the system operation while meeting the comfort needs of passengers.

[0070] Furthermore, upon detecting that the compressor's exhaust pressure exceeds a preset threshold, the system can first control one or more of the compressor's speed, the fresh air adjustment component, the blower, and the solenoid valve before adjusting the fan. If the compressor's exhaust pressure still exceeds the preset threshold when the fan's speed is adjusted to its maximum, other measures can be taken to reduce the compressor's exhaust pressure, such as lowering the air conditioning system's target outlet temperature.

[0071] In the case that the vehicle thermal management system does not have a solenoid valve, the operating speed of the compressor, the fresh air adjustment component and one or more of the blower can be controlled first, and then the fan can be adjusted.

[0072] In some embodiments, the above-mentioned control method of the vehicle thermal management system further includes: lowering the target air outlet temperature of the air-conditioning system.

[0073] In other words, in the above embodiments, the control strategy prioritizes passenger manual control needs (e.g., low air volume and high air temperature, i.e., setting a low gear and a high target outlet temperature). However, when passenger manual control needs cannot be prioritized, the air conditioner must operate safely within reasonable operating boundaries. When passenger manual control needs cannot be prioritized, the target outlet temperature of the air conditioner system is lowered to ensure safe operation within reasonable operating boundaries.

[0074] In some embodiments, the vehicle thermal management system control method further includes determining that the blower position is a preset position and the target outlet air temperature of the air conditioning system is greater than the preset outlet air temperature. The preset position and the preset outlet air temperature can be calibrated based on actual conditions. For example, the preset position can be the lowest position.

[0075] That is to say, when using a compressor to meet small heating capacity requirements, especially in scenarios with low air volume and high air temperature, multiple measures or their combination are adopted to effectively protect the operation of the system while meeting the comfort needs of passengers to the greatest extent.

[0076] As a specific example, as shown in Figure 2, 1 is the front-end low-temperature radiator assembly LTR (heat dissipation component), 2 is the electric drive system Motor, 3 is the heater core (heater core), 4 is the WCC (water-cooled condenser) plate heat exchanger (heat exchanger, the air conditioning system and the coolant circulation system exchange heat through this heat exchanger), 5 is the heater core water pump, 6 is the three-way water valve (solenoid valve), 7 is the heat storage drying pipe, 8 is the compressor, 9 is the first electronic expansion valve, 10 is the evaporator, 11 is the second electronic expansion valve, 12 is the chiller plate heat exchanger, and 13 is the fan. Among them, the front-end low-temperature radiator assembly LTR1, the electric drive system 2, the heater core 3, the WCC plate heat exchanger 4, the heater core water pump 5, the three-way water valve 6 and the fan 13 are connected by coolant pipelines to form a coolant circulation system. The transmission medium in the coolant circulation system is coolant. The WCC plate heat exchanger 4, heat storage drying tube 7, compressor 8, first electronic expansion valve 9, evaporator 10, second electronic expansion valve 11, and chiller plate heat exchanger 12 are connected via refrigerant piping to form an air conditioning system. The transmission medium in the air conditioning system is refrigerant. The coolant circulation system and the air conditioning system exchange heat between the coolant piping and the refrigerant piping via the WCC plate heat exchanger 4.

[0077] The control method of the thermal management system corresponding to FIG2 is shown in FIG3. After the air conditioner is turned on, the control method of the vehicle thermal management system of the present disclosure may include the following steps:

[0078] Step 1: Detect the exhaust pressure to determine whether the system has triggered the high-pressure boundary. If the high-pressure boundary is not triggered, the air-conditioning system is operating safely within a reasonable operating boundary.

[0079] In step 2, if the high-pressure boundary is triggered, the compressor speed is automatically reduced. After the compressor speed is reduced, the compressor exhaust pressure is tested again to determine whether the system has triggered the high-pressure boundary. If the high-pressure boundary is not triggered, the air conditioning system is operating safely within the reasonable operating boundary.

[0080] In step 3, if the system still triggers the high-pressure boundary and the compressor speed has been reduced to the minimum operating speed, the air conditioning system is checked to see if it is in automatic operation. If it is, the system automatically controls the air volume or the recirculation damper (fresh air adjustment component), such as increasing the air volume or increasing the external recirculation ratio, to reduce the system exhaust pressure, thereby ensuring that the air conditioning system operates safely within reasonable operating boundaries.

[0081] Step 4. If the air conditioning system is in a non-automatic operation state, that is, in a manual operation state, further detect whether the circulating air door (fresh air adjustment component) is in an automatic control state; if the circulating air door (fresh air adjustment component) is in an automatic control state, increase the external circulation ratio, reduce the inlet air temperature, and reduce the exhaust pressure, so that the air conditioning system can operate safely within a reasonable operating boundary.

[0082] In step 5, if the circulating damper (fresh air adjustment component) is already in full external circulation and the system still triggers the high-pressure boundary, and the exhaust pressure still exceeds the safe operating boundary of the compressor, then proceed to step 5. If the circulating damper (fresh air adjustment component) is in manual control in step 4, then skip adjusting the circulating damper (fresh air adjustment component) and proceed directly to step 5. At this time, check whether the blower air volume is in automatic control. If the blower air volume is in automatic control, increase the blower air volume and reduce the exhaust pressure, so that the air conditioning system operates safely within a reasonable operating boundary. If the blower air volume is increased, the system still operates outside the high-pressure boundary, then proceed to step 6.

[0083] In step 6, adjust the three-way water valve opening to allow more hot water to be dissipated into the environment through the LTR. This will passively increase the compressor speed while maintaining a constant outlet air temperature, ensuring safe operation of the air conditioning system within reasonable operating limits. If, in step 5, the blower air volume is detected to be in manual control, then skip adjusting the blower air volume and proceed directly to step 6. If, in step 6, after adjusting the three-way water valve opening, the exhaust pressure still exceeds the operating limit, proceed to step 7.

[0084] Step 7: Passively increase the blower's air volume. Even if the blower is in manual mode at this time, for the safe operation of the system, the software will appropriately increase the blower's air volume to reduce the exhaust pressure, so that the air conditioning system can operate safely within the reasonable operating boundary. If the system still operates outside the high-pressure boundary after passively increasing the blower's air volume, proceed to step 8.

[0085] Step 8: Passively lower the outlet air temperature to reduce the exhaust pressure required by the system, thereby reducing the operating speed of the compressor and allowing the air conditioning system to operate safely within a reasonable operating boundary.

[0086] As a specific example, as shown in Figure 4, 1 is the front-end low-temperature radiator assembly LTR (i.e., the heat dissipation component), 2 is the electric drive system Motor, 13 is the fan, 4 is the WCC plate heat exchanger (heat exchanger), 5 is the heater water pump, 3 is the heater core (heater core), 7 is the heat storage and drying pipe, 8 is the compressor, 9 is the first electronic expansion valve, 10 is the evaporator, 11 is the second electronic expansion valve, and 12 is the chiller plate heat exchanger. The front-end low-temperature radiator assembly LTR1, electric drive system 2, heater core 3, WCC plate heat exchanger 4, heater water pump 5, and fan 13 are connected via coolant piping to form a coolant circulation system, in which the transmission medium in the coolant circulation system is coolant. The WCC plate heat exchanger 4, heat storage and drying pipe 7, compressor 8, first electronic expansion valve 9, evaporator 10, second electronic expansion valve 11, and chiller plate heat exchanger 12 are connected via refrigerant piping to form an air conditioning system, in which the transmission medium in the air conditioning system is refrigerant. The coolant circulation system and the air conditioning system realize heat exchange between the coolant pipeline and the refrigerant pipeline through the WCC plate heat exchanger 4.

[0087] The control method of the thermal management system corresponding to FIG4 is shown in FIG5. After the air conditioner is turned on, the control method of the vehicle thermal management system of the present disclosure may include the following steps:

[0088] Step 1: Detect the exhaust pressure to determine whether the system has triggered the high-pressure boundary. If the high-pressure boundary is not triggered, the air-conditioning system is operating safely within a reasonable operating boundary.

[0089] In step 2, if the high-pressure boundary is triggered, the compressor speed is automatically reduced. After the compressor speed is reduced, the compressor exhaust pressure is tested again to determine whether the system has triggered the high-pressure boundary. If the high-pressure boundary is not triggered, the air conditioning system is operating safely within the reasonable operating boundary.

[0090] In step 3, if the system still triggers the high-pressure boundary and the compressor speed has been reduced to the minimum operating speed, the air conditioning system is checked to see if it is in automatic operation. If so, the system automatically controls the air volume or recirculation damper (fresh air control component), such as increasing the air volume or increasing the external recirculation ratio, to reduce the system exhaust pressure, thereby ensuring that the air conditioning system operates safely within reasonable operating boundaries.

[0091] Step 4. If the air conditioning system is in a non-automatic operation state, that is, in a manual operation state, further detect whether the circulating air door (fresh air adjustment component) is in an automatic control state; if the circulating air door (fresh air adjustment component) is in an automatic control state, increase the external circulation ratio, reduce the inlet air temperature, and reduce the exhaust pressure, so that the air conditioning system can operate safely within a reasonable operating boundary.

[0092] In step 5, if the circulating damper (fresh air regulating component) is already in the state of full external circulation, the system still triggers the high-pressure boundary, and the exhaust pressure still exceeds the safe operating boundary of the compressor, then go to step 5. If the circulating damper (fresh air regulating component) is in the manual control state in step 4, then skip adjusting the circulating damper (fresh air regulating component) and go directly to step 5. At this time, check whether the air volume of the blower is in the automatic control state. If the air volume of the blower is in the automatic control state, increase the air volume of the blower and reduce the exhaust pressure, so that the air conditioning system operates safely within a reasonable operating boundary. If the air volume of the blower is increased, the system still operates outside the high-pressure boundary, then go to step 6.

[0093] In step 6, adjust the fan speed. Increasing the fan speed allows more heat to be dissipated into the environment through the LTR. This allows the compressor speed to be passively increased while maintaining the outlet air temperature, ensuring the air conditioning system operates safely within reasonable operating boundaries. If, in step 5, the blower air volume is detected to be in manual control, the blower air volume adjustment is skipped and the process proceeds directly to step 6. If, in step 6, the exhaust pressure still exceeds the operating boundary after adjusting the fan speed, the process proceeds to step 7.

[0094] Step 7: Passively increase the blower air volume. Even if the blower is in manual mode at this time, for the safe operation of the system, the software will appropriately increase the blower air volume to reduce the exhaust pressure, so that the air conditioning system operates safely within the reasonable operating boundary. If the system still operates outside the high pressure boundary after passively increasing the blower air volume, proceed to step 8.

[0095] Step 8: Passively lower the outlet air temperature to reduce the exhaust pressure required by the system, thereby reducing the operating speed of the compressor and allowing the air conditioning system to operate safely within a reasonable operating boundary.

[0096] It should be noted that the embodiments corresponding to Figures 3 and 5 are only specific examples of the present disclosure. There can be many combinations of other methods for adjusting the exhaust pressure of the compressor. When the adjustment methods are combined with each other, there can also be many sequences, which are not limited here.

[0097] In summary, in the technical solution of the embodiment of the present disclosure, the exhaust pressure of the compressor is obtained in real time. When it is determined that the exhaust pressure of the compressor exceeds the preset pressure threshold, it indicates that the high-pressure protection function is triggered. At this time, one or more of the operating parameters of the compressor, the fresh air regulating component, the blower, and the fan are adjusted. For example, the operating frequency or operating speed of the compressor is adjusted, or the operating parameters of the compressor and the fresh air regulating component are adjusted, or the fan is adjusted, and so on. A combination of multiple methods or a separate execution method is used to reduce the exhaust pressure of the compressor so that the exhaust pressure of the compressor is less than the preset pressure threshold, thereby achieving effective protection of the system operation and meeting the comfort needs of the passengers. Corresponding to the above embodiments, the present disclosure also proposes a control device for a vehicle thermal management system.

[0098] As shown in Figures 2 and 4, the vehicle thermal management system may include a coolant circulation system 100 and an air-conditioning system 200. The air-conditioning system 200 includes a compressor 8, a fresh air conditioning component (not specifically shown in the figure), a heat exchanger 4 and a blower (not specifically shown in the figure). The coolant circulation system may include a heat exchanger 4 and a fan 13 arranged corresponding to the heat dissipation component 1. The air-conditioning system 200 and the coolant circulation system 100 exchange heat through the heat exchanger 4.

[0099] As shown in FIG6 , the control device 300 of the vehicle thermal management system of the present disclosure may include an acquisition module 310 and a control module 320. The acquisition module 310 is configured to acquire the exhaust pressure of the compressor, and the control module 320 is configured to, upon determining that the exhaust pressure of the compressor exceeds a preset pressure threshold, adjust one or more of the operating parameters of the compressor, the fresh air conditioning assembly, the blower, and the fan to reduce the exhaust pressure of the compressor to below the preset pressure threshold.

[0100] Specifically, the exhaust pressure of the compressor is obtained in real time through the acquisition module 310. When it is determined that the exhaust pressure of the compressor exceeds the preset pressure threshold, it means that the high-pressure protection function is triggered. At this time, the control module 320 adjusts one or more of the operating parameters of the compressor, the fresh air adjustment component, the blower, and the fan. For example, the control module 320 adjusts the operating frequency or operating speed of the compressor. For another example, the control module 320 adjusts the operating parameters of the compressor and the fresh air adjustment component. For another example, the control module 320 adjusts the fan in a combination of multiple ways, or in a separate execution method, to reduce the exhaust pressure of the compressor so that the exhaust pressure of the compressor is less than the preset pressure threshold, thereby achieving effective protection of the system operation and meeting the comfort needs of the passengers.

[0101] For example, after the air conditioning system is started, the acquisition module 310 monitors the compressor's exhaust pressure in real time. When the compressor's exhaust pressure does not trigger the high-pressure boundary, the control module 320 controls the air conditioning system to operate safely within reasonable operating boundaries. When the compressor's exhaust pressure triggers the high-pressure boundary, the control module 320 can reduce the compressor's operating speed to lower the compressor's exhaust pressure until the compressor's exhaust pressure no longer triggers the high-pressure boundary. Alternatively, when the compressor's exhaust pressure exceeds a preset pressure threshold, the control module 320 adjusts the adjustment ratio of the fresh air conditioning component to increase the mixing ratio of fresh air from outside the vehicle and inside the vehicle. Alternatively, when the compressor's exhaust pressure exceeds a preset pressure threshold, the control module 320 adjusts the blower's air volume (the blower of the air conditioning system) to increase the blower's air volume. Alternatively, when the compressor's exhaust pressure exceeds a preset pressure threshold, the control module 320 adjusts the fan's speed to increase it, allowing more hot water to be dissipated into the environment through the heat dissipation component. The compressor's operating speed is passively increased, reducing the compressor's exhaust pressure. Alternatively, the control module 320 combines multiple methods of the above measures to reduce the exhaust pressure of the compressor, thereby effectively protecting the system operation while giving priority to meeting the manual control needs of passengers and meeting the comfort needs of passengers.

[0102] In some embodiments, the operating parameters of the compressor include the operating speed of the compressor. The control module 320 adjusts the operating parameters of the compressor, specifically to reduce the operating speed of the compressor until the exhaust pressure of the compressor is lower than a preset pressure threshold, or the operating speed of the compressor is less than or equal to a first preset speed. The first preset speed can be calibrated according to actual conditions. For example, the first preset speed can be the minimum operating speed allowed by the compressor.

[0103] Specifically, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it reduces the exhaust pressure of the compressor by reducing the operating speed of the compressor. For example, the control module 320 reduces the operating speed of the compressor at a certain reduction rate until the exhaust pressure of the compressor is lower than the preset pressure threshold. When the operating speed of the compressor is reduced to the minimum operating speed, if the exhaust pressure of the compressor still exceeds the preset pressure threshold, other methods are used to reduce the exhaust pressure of the compressor. For example, the control module 320 adjusts one or more of the fresh air adjustment component, the blower, and the fan, thereby achieving effective protection of the system operation and meeting the comfort needs of the passengers.

[0104] It should be noted that the operating parameters of the compressor may also include the operating frequency. When the high-pressure protection is triggered, the exhaust pressure of the compressor can be reduced by reducing the operating frequency of the compressor. However, if the compressor is frequently started and stopped, it will reduce the comfort of the user.

[0105] In some embodiments, the control module 320 adjusts the fresh air conditioning component, specifically for increasing the external circulation ratio of the fresh air conditioning component when the air conditioning system is in automatic control state.

[0106] Specifically, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it detects whether the air conditioning system is in automatic control. If the air conditioning system is in automatic control, it increases the external circulation ratio of the fresh air conditioning component, that is, the proportion of air volume entering the vehicle from outside the vehicle is increased. For example, by increasing the opening of the fresh air conditioning component, the outdoor air entering the vehicle is increased and the wind temperature is reduced to increase the heat exchange. When the fresh air conditioning component is already in full external circulation, if the exhaust pressure of the compressor still exceeds the preset pressure threshold, the control module 320 uses other methods to reduce the exhaust pressure of the compressor. For example, the control module 320 adjusts one or more of the operating speed of the compressor, the blower, and the fan.

[0107] In addition, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it can first reduce the operating speed of the compressor to reduce the exhaust pressure of the compressor. When the operating speed of the compressor is reduced to the first preset speed, the exhaust pressure of the compressor still exceeds the preset pressure threshold. At this time, the control module 320 can control the fresh air adjustment component when the air-conditioning system is in an automatic control operation state. When the fresh air adjustment component is already in a full external circulation state, if the exhaust pressure of the compressor still exceeds the preset pressure threshold, the control module 320 will use other methods to reduce the exhaust pressure of the compressor, for example, adjusting one or more of the blower and fan. In this way, the exhaust pressure of the system can be reduced by increasing the air output of the air-conditioning system or increasing the external circulation ratio, so that the air conditioner can operate safely within a reasonable operating boundary.

[0108] In some embodiments, the control module 320 adjusts the fresh air conditioning component and is also used to: increase the external circulation ratio of the fresh air conditioning component when the air conditioning system is in a non-automatic control state and the fresh air conditioning component is in an automatic control state.

[0109] Specifically, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it detects whether the air-conditioning system is in an automatic control state. If the air-conditioning system is in a non-automatic control state (manual control state), it further determines whether the fresh air adjustment component is in an automatic control state. When the fresh air adjustment component is in the automatic control state, the control module 320 increases the external circulation ratio, reduces the inlet air temperature, and reduces the exhaust pressure, so that the air conditioner operates safely within a reasonable operating boundary, while also reducing the perception of the air volume adjustment of the air conditioning system. When the fresh air adjustment component is already in a full external circulation state, if the exhaust pressure of the compressor still exceeds the preset pressure threshold, the control module 320 uses other methods to reduce the exhaust pressure of the compressor, for example, adjusting one or more of the compressor's operating speed, blower, solenoid valve, and fan; for example, adjusting one or more of the blower and fan.

[0110] When the fresh air conditioning component is not in the automatic control state, the control module 320 does not adjust the fresh air conditioning component and uses other methods to reduce the exhaust pressure of the compressor, such as adjusting one or more of the blower, solenoid valve, and fan; or adjusting the operating speed of the compressor, the blower, and the fan. This increases the external circulation ratio, reduces the inlet air temperature, and reduces the exhaust pressure, thereby ensuring that the air conditioner operates safely within reasonable operating boundaries.

[0111] In some embodiments, the control module 320 adjusts the blower, specifically to increase the air output of the blower when the air conditioning system is in automatic control, or when the air conditioning system is in non-automatic control and the blower is in automatic control.

[0112] Specifically, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it detects whether the air conditioning system is in an automatic control state. If the air conditioning system is in an automatic control state, the air output of the blower is automatically controlled by the air conditioning system, for example, the air output of the blower is increased. If the air conditioning system is in a non-automatic control state, the control module 320 further detects whether the blower (such as a blower) is in an automatic control state. If the blower is in an automatic control state, the control module 320 increases the air output of the blower and reduces the exhaust pressure of the compressor, so that the air conditioning operates safely within a reasonable operating boundary. Among them, when the air output of the blower reaches the maximum air output, the exhaust pressure of the compressor still exceeds the preset pressure threshold. The control module 320 then uses other methods to reduce the exhaust pressure of the compressor, for example, by adjusting one or more of the operating speed of the compressor, the fresh air adjustment component, and the fan, thereby achieving effective protection of the system operation and meeting the comfort needs of the passengers.

[0113] When the blower is in a non-automatic control state, the control module 320 reduces the exhaust pressure of the compressor in other ways, for example, by adjusting one or more of the operating speed of the compressor, the fresh air adjustment component, and the fan.

[0114] Furthermore, upon determining that the compressor's exhaust pressure exceeds a preset pressure threshold, the control module 320 may first control one or more of the compressor's operating speed and the fresh air adjustment component before adjusting the blower. If the compressor's exhaust pressure still exceeds the preset pressure threshold when the blower's air output reaches its maximum output, or if the blower is not in automatic operation, the control module 320 may reduce the compressor's exhaust pressure by other means, such as adjusting the fan.

[0115] In some embodiments, the coolant circulation system may further include a solenoid valve provided at the output end of the warm core water pump, the solenoid valve being used to regulate the flow of coolant flowing into the heat dissipation component, and the control module 320 being further used to regulate the opening of the solenoid valve.

[0116] Furthermore, in some embodiments, the control module 320 regulates the solenoid valve, specifically to increase the opening of the solenoid valve to increase the flow of coolant flowing into the heat dissipation component.

[0117] Specifically, when the control module 320 determines that the compressor's exhaust pressure exceeds a preset pressure threshold, it adjusts the opening of the solenoid valve, increasing the coolant flowing through the heat sink assembly LTR, allowing more hot water to be dissipated into the environment through the heat sink assembly LTR. This allows the compressor's speed to be passively increased while maintaining a constant outlet air temperature, reducing the compressor's exhaust pressure and allowing the compressor to operate safely within reasonable operating boundaries. If the compressor's exhaust pressure still exceeds the preset pressure threshold when the solenoid valve opening reaches its maximum opening, the control module 320 will then use other methods to reduce the compressor's exhaust pressure, such as adjusting one or more of the compressor's operating speed, the fresh air adjustment assembly, the blower, or the fan, thereby effectively protecting system operation while meeting passenger comfort needs.

[0118] Furthermore, upon determining that the compressor's exhaust pressure exceeds a preset pressure threshold, the control module 320 may first control one or more of the compressor's operating speed, the fresh air adjustment component, and the blower before adjusting the solenoid valve. If the compressor's exhaust pressure still exceeds the preset pressure threshold when the solenoid valve reaches its maximum opening, the control module 320 may employ other methods to reduce the compressor's exhaust pressure, such as adjusting the fan.

[0119] In some embodiments, the control module 320 is further configured to increase the air volume of the blower when the opening of the solenoid valve reaches a preset opening threshold and the blower is in a non-automatic control state. The preset opening threshold can be calibrated according to actual conditions, for example, the maximum opening allowed by the solenoid valve.

[0120] Specifically, when adjusting the opening of the solenoid valve, if the opening of the solenoid valve reaches a preset opening threshold, the control module 320 passively increases the air volume of the blower. Even if the blower is in a non-automatic control state (manual state), for the safe operation of the system, the air volume of the blower is appropriately increased to reduce the exhaust pressure, thereby allowing the compressor to operate safely within a reasonable operating boundary. If, after passively increasing the air volume of the blower, the exhaust pressure of the compressor still exceeds the preset pressure threshold, other methods are used to reduce the exhaust pressure of the compressor, for example, by lowering the target outlet temperature of the air conditioning system.

[0121] In some embodiments, the control module 320 adjusts the fan, specifically to increase the operating speed of the fan.

[0122] Specifically, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it adjusts the operating speed of the fan, increasing the operating speed of the fan so that more heat is dissipated into the environment through the heat dissipation component LTR, thereby maintaining the outlet air temperature while passively increasing the speed of the compressor, allowing the air conditioner to operate safely within a reasonable operating boundary. If the exhaust pressure of the compressor still exceeds the preset pressure threshold when the fan operating speed is adjusted to the maximum value, the control module 320 will then use other methods to reduce the exhaust pressure of the compressor, for example, by adjusting one or more of the operating speed of the compressor, the fresh air adjustment component, the blower, and the solenoid valve, thereby achieving effective protection of the system operation while meeting the comfort needs of the passengers.

[0123] Furthermore, upon determining that the compressor's exhaust pressure exceeds a preset pressure threshold, the control module 320 may first control one or more of the compressor's operating speed, the fresh air adjustment component, the blower, and the solenoid valve before adjusting the fan. If the compressor's exhaust pressure still exceeds the preset pressure threshold when the fan's operating speed is adjusted to the maximum, the control module 320 may employ other methods to reduce the compressor's exhaust pressure, such as lowering the air conditioning system's target outlet temperature.

[0124] In the case where the vehicle thermal management system does not have a solenoid valve, the control module 320 may first control one or more of the operating speed of the compressor, the fresh air adjustment component, and the blower, and then adjust the fan.

[0125] In some embodiments, the control module 320 is further configured to lower the target air outlet temperature of the air conditioning system.

[0126] That is, in the above embodiments, the control strategy prioritizes satisfying the manual control needs of passengers (e.g., low air volume and high air temperature, i.e., setting a low gear and a high target outlet air temperature). However, when the manual control needs of passengers cannot be prioritized, the air conditioner must operate safely within reasonable operating boundaries. If the manual control needs of passengers cannot be prioritized, the control module 320 lowers the target outlet air temperature of the air conditioner system to ensure safe operation within reasonable operating boundaries.

[0127] In some embodiments, the control module 320 is further configured to determine that the blower fan gear is at a preset gear and that the target outlet air temperature of the air conditioning system is greater than a preset outlet air temperature. The preset gear and the preset outlet air temperature can be calibrated based on actual conditions. For example, the preset gear can be the lowest gear.

[0128] That is to say, when using a compressor to meet small heating capacity requirements, especially in scenarios with low air volume and high air temperature, multiple measures or their combination are adopted to effectively protect the operation of the system while meeting the comfort needs of passengers to the greatest extent.

[0129] It should be noted that for details not disclosed in the control device of the vehicle thermal management system of the embodiment of the present disclosure, please refer to the details disclosed in the control method of the vehicle thermal management system of the embodiment of the present disclosure, and the details will not be repeated here.

[0130] Corresponding to the above embodiments, the present disclosure also proposes a computer-readable storage medium.

[0131] The computer-readable storage medium of the present disclosure stores a control program for a vehicle thermal management system. When the control program for the vehicle thermal management system is executed by a processor, the control method for the vehicle thermal management system is implemented.

[0132] Corresponding to the above embodiments, the present disclosure also proposes a vehicle.

[0133] As shown in Figure 7, the vehicle 400 of the present disclosure includes a memory 410, a processor 420, and a control program of the vehicle thermal management system stored in the memory 410 and executable on the processor 420. When the processor 420 executes the control program of the vehicle thermal management system, the above-mentioned control method of the vehicle thermal management system is implemented.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure, and they should all be included in the scope of the claims and specification of the present disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A control method for a vehicle thermal management system, the vehicle thermal management system comprising a coolant circulation system and an air conditioning system, the air conditioning system comprising a compressor, a fresh air conditioning component, a heat exchanger and a blower, the coolant circulation system comprising a heat exchanger and a fan corresponding to the heat dissipation component, the air conditioning system and the coolant circulation system exchange heat through the heat exchanger, the method comprising: Obtaining the exhaust pressure of the compressor; When it is determined that the exhaust pressure of the compressor exceeds a preset pressure threshold, one or more of the operating parameters of the compressor, the fresh air adjustment component, the blower, and the fan are adjusted to make the exhaust pressure of the compressor lower than the preset pressure threshold.

2. The control method according to claim 1, wherein: The operating parameters of the compressor include the operating speed of the compressor, and adjusting the operating parameters of the compressor includes: The operating speed of the compressor is reduced until the exhaust pressure of the compressor is lower than the preset pressure threshold, or the operating speed of the compressor is less than or equal to a first preset speed.

3. The control method according to claim 1 or 2, wherein: Adjusting the fresh air adjustment component includes: When the air conditioning system is in automatic control, increasing the external circulation ratio of the fresh air conditioning component; or When the air conditioning system is in a non-automatic control state and the fresh air conditioning component is in an automatic control state, the external circulation ratio of the fresh air conditioning component is increased.

4. The control method according to any one of claims 1 to 3, wherein: The blower is adjusted, including: When the air conditioning system is in an automatic control state, or when the air conditioning system is in a non-automatic control state and the blower is in an automatic control state, the air output of the blower is increased.

5. The control method according to any one of claims 1 to 4, wherein: The coolant circulation system further includes a solenoid valve disposed at an output end of a warm core water pump, the solenoid valve being used to adjust the coolant flow rate flowing into the heat dissipation component, and the method further includes: The opening of the solenoid valve is adjusted.

6. The control method according to claim 5, wherein: The solenoid valve is adjusted, including: The opening of the solenoid valve is increased to increase the flow of coolant flowing into the heat dissipation component.

7. The control method according to claim 6, wherein: Also includes: When the opening of the solenoid valve reaches a preset opening threshold, if the blower is in a non-automatic control state, the air output of the blower is increased.

8. The control method according to claim 1 or 7, wherein: The fan is adjusted, comprising: Increase the operating speed of the fan.

9. The control method according to claim 1, wherein: Also includes: The target air outlet temperature of the air conditioning system is lowered.

10. The control method according to claim 1, wherein: Also includes: It is determined that the fan gear of the blower is a preset gear and the target air outlet temperature of the air conditioning system is greater than the preset air outlet temperature.

11. A control device for a vehicle thermal management system, the vehicle thermal management system comprising a coolant circulation system and an air conditioning system, the air conditioning system comprising a compressor, a fresh air conditioning component, a heat exchanger and a blower, the coolant circulation system comprising a heat exchanger and a fan corresponding to the heat dissipation component, the air conditioning system and the coolant circulation system exchange heat through the heat exchanger, the device comprising: An acquisition module, used for acquiring the exhaust pressure of the compressor; A control module is used to adjust one or more of the operating parameters of the compressor, the fresh air adjustment component, the blower, and the fan to make the exhaust pressure of the compressor lower than the preset pressure threshold when it is determined that the exhaust pressure of the compressor exceeds the preset pressure threshold.

12. A computer-readable storage medium storing a control program of a vehicle thermal management system, wherein the control program of the vehicle thermal management system, when executed by a processor, implements the control method of the vehicle thermal management system according to any one of claims 1 to 10.

13. A vehicle, comprising a memory, a processor, and a control program for a vehicle thermal management system stored in the memory and executable on the processor, wherein when the processor executes the control program for the vehicle thermal management system, the control method for the vehicle thermal management system according to any one of claims 1 to 10 is implemented.

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