Vehicle, control method and device of thermal management system of vehicle and storage medium

Abstract

The invention discloses a vehicle, a control method and device of a thermal management system of the vehicle and a storage medium, the thermal management system of the vehicle comprises a cooling liquid circulation system and an air conditioning system, the air conditioning system comprises a compressor, a fresh air adjusting assembly, a heat exchanger and an air blower, and the cooling liquid circulation system comprises the heat exchanger and a fan arranged corresponding to a heat dissipation assembly. The air conditioning system and the cooling liquid circulation system exchange heat through the heat exchanger. The method comprises the steps that the exhaust pressure of the compressor is obtained; and under the condition that it is determined that the exhaust pressure of the compressor exceeds the preset pressure threshold value, one or more of operation parameters of the compressor, a fresh air adjusting assembly, an air blower and a fan are adjusted, so that the exhaust pressure of the compressor is lower than the preset pressure threshold value. According to the control method, when the high-voltage protection function is triggered, effective protection of system operation is achieved through multiple measures or multiple measure combination modes, and meanwhile the comfort requirement of passengers is met.

Description

Technical Field

[0001] The present application 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

[0002] PTC (Positive Temperature Coefficient) heaters have been widely used due to their flexible heat regulation. However, in order to simplify the system architecture and reduce system costs, eliminating PTC heaters has become an optimization direction. However, after eliminating PTC heaters, high-voltage protection is likely to occur in the thermal management system, affecting the normal operation of the system. Summary of the invention

[0003] In view of the above problems, the present application 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.

[0004] In a first aspect, the present application 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 regulating 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 regulating component, the blower, and the fan to make the exhaust pressure of the compressor lower than the preset pressure threshold.

[0005] In the technical solution of the embodiment of the present application, 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 the operating speed of the compressor is adjusted. Another example is that the operating parameters of the compressor and the fresh air adjustment component are adjusted. Another example is that the fan is adjusted in a combination of multiple ways or in a separate manner 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.

[0006] In some embodiments, the operating parameters of the compressor include the operating speed of the compressor, and 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. By reducing the operating speed of the compressor, the exhaust pressure of the compressor is reduced, thereby achieving effective protection of system operation and meeting the comfort requirements of passengers.

[0007] In some embodiments, adjusting the fresh air conditioning component includes: when the air conditioning system is in an automatic control state, increasing the external circulation ratio of the fresh air conditioning component. By increasing the external circulation ratio, the exhaust pressure of the system is reduced, so that the air conditioning operates safely within a reasonable operating boundary.

[0008] 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. By increasing the external circulation ratio, 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.

[0009] In some embodiments, adjusting the blower includes: increasing the air volume 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. By increasing the air volume of the blower, the exhaust pressure of the compressor is reduced, so that the air conditioner operates safely within a reasonable operating boundary.

[0010] In some embodiments, the coolant circulation system also includes a solenoid valve arranged at the output end of the warm core water pump, and the solenoid valve is used to adjust the coolant flow rate flowing into the heat dissipation component. The above method also includes: adjusting the opening of the solenoid valve.

[0011] 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. By increasing the opening of the solenoid valve, more hot water is dissipated into the environment through the heat dissipation component LTR (Lower Thermal Radiator), so that the speed of the compressor is passively increased while keeping the outlet air temperature unchanged, so that the air conditioner operates safely within a reasonable operating boundary.

[0012] In some embodiments, the control method of the vehicle thermal management system further includes: when the opening of the solenoid valve reaches a preset opening threshold, if the blower is in a non-automatic control state, increasing the air volume of the blower. When the opening of the solenoid valve is adjusted to the preset opening threshold, if the system is still operating outside the high-pressure boundary, for the safe operation of the system, the air volume of the blower is appropriately increased and the exhaust pressure is reduced, so that the air conditioner can operate safely within a reasonable operating boundary.

[0013] In some embodiments, adjusting the fan includes: increasing the operating speed of the fan. By increasing the operating speed of the fan, more heat is dissipated to the environment through the heat dissipation component LTR, so that the speed of the compressor is passively increased while keeping the outlet air temperature unchanged, so that the air conditioner operates safely within a reasonable operating boundary.

[0014] In some embodiments, the above-mentioned vehicle thermal management system control method further includes: lowering the target air outlet temperature of the air conditioning system. Under the premise that the manual control requirements of passengers cannot be given priority, the target air outlet temperature of the air conditioning system is lowered so that the air conditioning operates safely within a reasonable operating boundary.

[0015] In some embodiments, the control method of the vehicle thermal management system further includes: determining 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. When using a compressor to achieve a small heating demand, multiple measures or a combination thereof are used to effectively protect the operation of the system while meeting the comfort needs of passengers to the greatest extent.

[0016] In a second aspect, the present application 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, wherein the air-conditioning system includes a compressor, a fresh air regulating component, a heat exchanger and a blower, and 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 regulating 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 a preset pressure threshold.

[0017] In the technical solution of the embodiment of the present application, 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 means 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 executed 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.

[0018] In a third aspect, the present application provides a computer-readable storage medium on which a control program for a vehicle thermal management system is stored. 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.

[0019] In a fourth aspect, the present application 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.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, 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 application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0022] Figure 1 A flowchart of a control method of a vehicle thermal management system according to some embodiments of the present application;

[0023] Figure 2 A block diagram of a vehicle thermal management system according to some embodiments of the present application;

[0024] Figure 3 A flowchart of a control method of a vehicle thermal management system according to some embodiments of the present application;

[0025] Figure 4 A block diagram of a vehicle thermal management system according to some embodiments of the present application;

[0026] Figure 5 A flowchart of a control method of a vehicle thermal management system according to some embodiments of the present application;

[0027] Figure 6 A block diagram of a control device for a vehicle thermal management system according to some embodiments of the present application;

[0028] Figure 7 A block diagram of a vehicle according to some embodiments of the present application. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] In the description of the embodiments of the present application, 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).

[0035] In the description of the embodiments of the present application, 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0036] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] 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, canceling the PTC heater has become an optimization direction. Since the PTC heater has a flexible way to adjust heat, it is widely used. However, after canceling the PTC heater, for some working conditions, such as using a compressor to achieve a small heating demand, high-voltage protection is likely to occur, affecting the normal operation of the system. Therefore, after canceling the PTC heater, how to use the compressor to achieve a small heating amount, especially the control of low air volume and high air temperature scenes has become a prominent problem facing the automotive thermal management industry.

[0038] This application is aimed at the thermal management system of vehicles without PTC heating. When the high-voltage protection is triggered, a combination of various means is used to achieve effective protection of the system operation and meet the comfort needs of passengers to the greatest extent. For example, actively increase the proportion of fresh air; for another example, if it still exceeds the compressor protection boundary, adjust the opening of the three-way water valve to increase external heat dissipation, thereby passively increasing the compressor speed so that it runs within the protection range; for another example, if it still exceeds the compressor protection boundary or the compressor speed is too high, passively increase the air volume corresponding to the low-speed wind at this time, increase the air volume, reduce the wind temperature, and thus reduce the compressor speed, and so on.

[0039] For the convenience of explanation, the following embodiments are combined Figure 1 A control method of the vehicle thermal management system of the present application will be described.

[0040] Reference Figure 1 The control method of the vehicle thermal management system in the present application may include the following steps:

[0041] S101, obtaining the exhaust pressure of the compressor. The exhaust pressure of the compressor can be obtained by a pressure sensor disposed at the exhaust port of the compressor.

[0042] S102, when it is determined that the exhaust pressure of the compressor exceeds the 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. The preset pressure threshold can be calibrated according to actual conditions, for example, the preset pressure threshold can be the maximum pressure value allowed by the compressor.

[0043] 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 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, 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 in a separate manner, to reduce the exhaust pressure of the compressor, so that the exhaust pressure of the compressor is less than the preset pressure threshold, so as to achieve effective protection of the system operation and meet the comfort needs of passengers.

[0044] Exemplarily, after the air conditioning system is started, the exhaust pressure of the compressor is detected in real time, and when the exhaust pressure of the compressor does not trigger the high-pressure boundary, the air conditioning system is controlled to operate safely within a reasonable operating boundary. When the exhaust pressure of the compressor triggers the high-pressure boundary, the operating speed of the compressor can be reduced to reduce the exhaust pressure of the compressor until the exhaust pressure of the compressor does not trigger the high-pressure boundary. Alternatively, when the exhaust pressure of the compressor exceeds the preset pressure threshold, the adjustment ratio of the fresh air adjustment component is adjusted to increase the mixing ratio of the fresh air from outside the vehicle and inside the vehicle. Alternatively, when the exhaust pressure of the compressor exceeds the preset pressure threshold, the air output of the blower (the blower of the air conditioning system) is adjusted to increase the air output of the blower. Alternatively, when the exhaust pressure of the compressor exceeds the preset pressure threshold, the speed of the fan is adjusted to increase the speed of the fan, so that more hot water is lost to the environment through the heat dissipation component, the operating speed of the compressor is passively increased, and the exhaust pressure of the compressor is reduced. Alternatively, by combining multiple methods in the above measures to reduce the exhaust pressure of the compressor, the effective protection of the system operation is achieved while meeting the comfort needs of the passengers while giving priority to meeting the manual control needs of the passengers.

[0045] In some embodiments, the operating parameters of the compressor include the operating speed of the compressor, and 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 according to actual conditions, for example, the first preset speed can be the lowest operating speed allowed by the compressor.

[0046] Specifically, when it is detected that the exhaust pressure of the compressor exceeds the 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, so as to achieve effective protection of the system operation and meet the comfort needs of passengers.

[0047] 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, the user comfort will be reduced.

[0048] In some embodiments, adjusting the fresh air conditioning component includes: when the air conditioning system is in automatic control, increasing the external circulation ratio of the fresh air conditioning component.

[0049] 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 an automatic control state, the external circulation ratio of the fresh air adjustment component is increased, that is, the proportion of air volume entering the car from outside is increased, for example, by increasing the opening of the fresh air adjustment component to increase the outdoor air entering the car. 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, by adjusting one or more of the operating speed of the compressor, the blower, and the fan.

[0050] 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 regulating component can be controlled when the air-conditioning system is in an automatic control operation state. When the fresh air regulating 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 the 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.

[0051] 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.

[0052] 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.

[0053] 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 volume 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 one or more of the operating speed of the compressor, the blower, and the fan; for example, adjusting one or more of the blower and the fan.

[0054] When the fresh air adjustment component is not in the automatic control state, the fresh air adjustment component is not adjusted, and other methods are used to reduce the exhaust pressure of the compressor, for example, one or more of the blower and the fan are adjusted; for example, the operating speed of the compressor, the blower and the fan are adjusted. In this way, the air intake temperature and the exhaust pressure are reduced by increasing the external circulation ratio, thereby making the air conditioner operate safely within a reasonable operating boundary.

[0055] In some embodiments, adjusting the blower includes increasing the air volume 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.

[0056] 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 volume of the blower is automatically controlled by the air-conditioning system, for example, the air volume 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 volume of the blower is increased to reduce the exhaust pressure of the compressor, so that the air conditioner operates safely within a reasonable operating boundary. Among them, when the air volume of the blower reaches the maximum air volume, 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, the operating speed of the compressor, the fresh air adjustment component, and one or more of the fans are adjusted, so as to achieve effective protection of the system operation and meet the comfort needs of the passengers.

[0057] 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.

[0058] In addition, when it is detected that the exhaust pressure of the compressor exceeds the preset pressure threshold, the operating speed of the compressor and one or more of the fresh air adjustment components can be controlled first, and then the blower can be adjusted. When the air output of the blower reaches the maximum air output, the exhaust pressure of the compressor still exceeds the preset pressure threshold, or when the blower is in a non-automatic operation state, other methods are used to reduce the exhaust pressure of the compressor, for example, adjusting the fan.

[0059] In some embodiments, the coolant circulation system may further include a solenoid valve disposed at an output end of the warm core water pump, the solenoid valve being used to adjust the coolant flow rate flowing into the heat dissipation component, and the above method further includes: adjusting the opening of the solenoid valve.

[0060] Further, 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).

[0061] 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, so that the speed of the compressor is passively increased while keeping the outlet air temperature unchanged, 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, one or more of the operating speed of the compressor, the fresh air adjustment component, the blower, and the fan are adjusted, so as to achieve effective protection of the system operation and meet the comfort needs of passengers.

[0062] In addition, when it is detected that the exhaust pressure of the compressor exceeds the preset pressure threshold, the operating speed of the compressor, the fresh air adjustment component and the blower can be controlled first, and then the solenoid valve can be adjusted. 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, adjusting the fan.

[0063] In some embodiments, the control method of the vehicle thermal management system further includes: when the opening of the solenoid valve reaches a preset opening threshold, if the blower is in a non-automatic control state, increasing the air volume of the blower. The preset opening threshold can be calibrated according to actual conditions, for example, the maximum opening allowed by the solenoid valve.

[0064] Specifically, when adjusting the opening of the solenoid valve, if the opening of the solenoid valve reaches the preset opening threshold, the air volume of the blower 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 air volume of the blower is appropriately increased to reduce the exhaust pressure, so that the compressor can operate safely within a reasonable operating boundary. Among them, after the air volume of the blower is passively increased, 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, reducing the target air outlet temperature of the air conditioning system.

[0065] In some embodiments, adjusting the fan includes increasing the operating speed of the fan.

[0066] Specifically, when it is detected that the exhaust pressure of the compressor exceeds the preset pressure threshold, the operating speed of the fan is adjusted, and the operating speed of the fan is increased so that more heat is dissipated into the environment through the heat dissipation component LTR, so that the speed of the compressor is passively increased while keeping the outlet air temperature unchanged, so that the air conditioner can operate safely within a reasonable operating boundary. Among them, when the operating speed of the fan is adjusted to the maximum value, 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 operating speed of the compressor, the fresh air adjustment component, the blower, and the solenoid valve are adjusted, so as to achieve effective protection of the system operation and meet the comfort needs of passengers.

[0067] In addition, when it is detected that the exhaust pressure of the compressor exceeds the preset pressure threshold, the operating speed of the compressor, the fresh air adjustment component, the blower and the solenoid valve can be controlled first, and then the fan can be adjusted. When the fan operating speed is adjusted to the maximum value, 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, reducing the target air outlet temperature of the air conditioning system.

[0068] When the vehicle thermal management system does not have a solenoid valve, the fan can be adjusted after controlling one or more of the operating speed of the compressor, the fresh air adjustment component and the blower.

[0069] In some embodiments, the above-mentioned control method of the vehicle thermal management system also includes: lowering the target air outlet temperature of the air-conditioning system.

[0070] That is to say, in the above embodiments, the control strategies are all based on the premise of giving priority to satisfying the manual control needs of passengers (such as low air volume and high air temperature, that is, setting the gear to be low and the target outlet air temperature to be high), and when the manual control needs of passengers cannot be given priority, the air conditioner needs to be operated safely within a reasonable operating boundary. Under the premise of failing to give priority to satisfying the manual control needs of passengers, the target outlet air temperature of the air conditioning system is lowered to make the air conditioner operate safely within a reasonable operating boundary.

[0071] In some embodiments, the control method of the vehicle thermal management system further includes: determining 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. The preset gear and the preset air outlet temperature can be calibrated according to actual conditions, for example, the preset gear can be the lowest gear.

[0072] 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, a variety of measures or a combination of them are used to effectively protect the operation of the system while meeting the comfort needs of passengers to the greatest extent.

[0073] As a specific example, Figure 2 As shown, 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 (heat core), 4 is the WCC (Water Cooled Condenser, water-cooled condenser) plate heat exchanger (heat exchanger, air conditioning system and 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 through the coolant pipeline to form a coolant circulation system, and the transmission medium in the coolant circulation system is coolant. The WCC plate heat exchanger 4, the heat storage drying tube 7, the compressor 8, the first electronic expansion valve 9, the evaporator 10, the second electronic expansion valve 11 and the chiller plate heat exchanger 12 are connected through a refrigerant pipeline to form an air conditioning system, and the transmission medium in the air conditioning system is the 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.

[0074] correspond Figure 2 The control method of the thermal management system is as follows Figure 3 As shown, after turning on the air conditioner, the control method of the vehicle thermal management system of the present application may include the following steps:

[0075] The first step is to detect the exhaust pressure and determine whether the system has triggered the high-pressure boundary. If the high-pressure boundary is not triggered, the air-conditioning system operates safely within a reasonable operating boundary.

[0076] Step 2: If the high pressure boundary is triggered, the compressor speed is automatically reduced. After reducing the compressor speed, 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 a reasonable operating boundary.

[0077] Step 3: If the system still triggers the high-pressure boundary, the compressor speed has been reduced to the lowest speed. At this time, check whether the air conditioning system is in automatic operation. If the air conditioning system is in automatic operation, the system automatically controls the air volume or circulation damper (fresh air adjustment component), such as increasing the air volume or increasing the external circulation ratio, to reduce the system exhaust pressure, so that the air conditioning system can operate safely within a reasonable operating boundary.

[0078] Step 4. If the air conditioning system is in a non-automatic operation state, that is, in a manual operation state, then further detect whether the circulating air damper (fresh air adjustment component) is in an automatic control state; if the circulating air damper (fresh air adjustment component) is in an automatic control state, then 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 operation boundary.

[0079] In step 5, if the circulating damper (fresh air adjustment 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 adjustment component) is in manual control in step 4, skip the adjustment of the circulating damper (fresh air adjustment 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 can operate 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.

[0080] In step 6, adjust the opening of the three-way water valve so that more hot water is lost to the environment through the LTR, so that the compressor speed will be passively increased while keeping the outlet air temperature unchanged, so that the air conditioning system can operate safely within a reasonable operating boundary. If in step 5, it is detected that the air volume of the blower is in manual control, skip the adjustment of the air volume of the blower and go directly to step 6. If in step 6, after adjusting the opening of the three-way water valve, the exhaust pressure still exceeds the operating boundary, go to step 7.

[0081] Step 7, passively increase the air volume of the blower. Even if the blower is in manual mode at this time, for the safe operation of the system, the software is used to appropriately increase the air volume of the blower (blower) and reduce the exhaust pressure, so that the air conditioning system can operate safely within a reasonable operating boundary. If the system still operates outside the high-pressure boundary after passively increasing the air volume of the blower, enter step 8.

[0082] 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, allowing the air conditioning system to operate safely within a reasonable operating boundary.

[0083] As a specific example, Figure 4As shown, 1 is the front-end low-temperature radiator assembly LTR (i.e., 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 (heat core), 7 is the heat storage drying tube, 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. 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 water pump 5 and the fan 13 are connected through the coolant pipeline to form a coolant circulation system, and the transmission medium in the coolant circulation system is the coolant. The WCC plate heat exchanger 4, the heat storage drying tube 7, the compressor 8, the first electronic expansion valve 9, the evaporator 10, the second electronic expansion valve 11, and the chiller plate heat exchanger 12 are connected through the refrigerant pipeline to form an air-conditioning system, and the transmission medium in the air-conditioning system is the 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.

[0084] correspond Figure 4 The control method of the thermal management system is as follows Figure 5 As shown, after turning on the air conditioner, the control method of the vehicle thermal management system of the present application may include the following steps:

[0085] The first step is to detect the exhaust pressure and determine whether the system has triggered the high-pressure boundary. If the high-pressure boundary is not triggered, the air-conditioning system operates safely within a reasonable operating boundary.

[0086] Step 2: If the high pressure boundary is triggered, the compressor speed is automatically reduced. After reducing the compressor speed, 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 a reasonable operating boundary.

[0087] Step 3: If the system still triggers the high-pressure boundary, the compressor speed has been reduced to the lowest speed. At this time, check whether the air conditioning system is in automatic operation. If the air conditioning system is in automatic operation, the system automatically controls the air volume or circulation damper (fresh air adjustment component), such as increasing the air volume or increasing the external circulation ratio, to reduce the system exhaust pressure, so that the air conditioning system can operate safely within a reasonable operating boundary.

[0088] Step 4. If the air conditioning system is in a non-automatic operation state, that is, in a manual operation state, then further detect whether the circulating air damper (fresh air adjustment component) is in an automatic control state; if the circulating air damper (fresh air adjustment component) is in an automatic control state, then 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 operation boundary.

[0089] In step 5, if the circulating damper (fresh air adjustment 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 adjustment component) is in manual control in step 4, skip the adjustment of the circulating damper (fresh air adjustment 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 can operate 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.

[0090] Step 6, adjust the fan speed, increase the fan speed, so that more heat is dissipated to the environment through the LTR, so that the compressor speed will be passively increased while keeping the outlet temperature unchanged, so that the air conditioning system can operate safely within a reasonable operating boundary. If in step 5, it is detected that the air volume of the blower is in manual control, skip the adjustment of the air volume of the blower and go directly to step 6. If in step 6, after adjusting the fan speed, the exhaust pressure still exceeds the operating boundary, go to step 7.

[0091] Step 7, passively increase the air volume of the blower. Even if the blower is in manual mode at this time, for the safe operation of the system, the software will appropriately increase the air volume of the blower to reduce the exhaust pressure, so that the air conditioning system can operate safely within a reasonable operating boundary. If the system still operates outside the high-pressure boundary after passively increasing the air volume of the blower, enter step 8.

[0092] 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, allowing the air conditioning system to operate safely within a reasonable operating boundary.

[0093] It should be noted that Figure 3 and Figure 5 The corresponding embodiments are only specific examples of the present application. There may be many combinations of other methods for adjusting the exhaust pressure of the compressor. When the adjustment methods are combined with each other, there may be many sequences, which are not limited here.

[0094] In summary, in the technical solution of the embodiment of the present application, 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 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 single 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 requirements of passengers. Corresponding to the above embodiments, the present application also proposes a control device for a vehicle thermal management system.

[0095] like Figure 2 and 4 As shown, 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.

[0096] like Figure 6 As shown, the control device 300 of the vehicle thermal management system of the present application may include: an acquisition module 310 and a control module 320. The acquisition module 310 is used to acquire the exhaust pressure of the compressor, and the control module 320 is used to adjust one or more of the operating parameters of the compressor, the fresh air adjustment component, the blower, and the fan when it is determined that the exhaust pressure of the compressor exceeds the preset pressure threshold, so that the exhaust pressure of the compressor is lower than the preset pressure threshold.

[0097] 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 single 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 passengers.

[0098] Exemplarily, after the air conditioning system is started, the acquisition module 310 detects the exhaust pressure of the compressor in real time. When the exhaust pressure of the compressor does not trigger the high-pressure boundary, the control module 320 controls the air conditioning system to operate safely within a reasonable operating boundary. When the exhaust pressure of the compressor triggers the high-pressure boundary, the control module 320 can reduce the operating speed of the compressor to reduce the exhaust pressure of the compressor until the exhaust pressure of the compressor does not trigger the high-pressure boundary. Alternatively, when the exhaust pressure of the compressor exceeds the preset pressure threshold, the control module 320 adjusts the adjustment ratio of the fresh air adjustment component to increase the mixing ratio of the fresh air from outside the vehicle and inside the vehicle. Alternatively, when the exhaust pressure of the compressor exceeds the preset pressure threshold, the control module 320 adjusts the air output of the blower (the blower of the air conditioning system) to increase the air output of the blower. Alternatively, when the exhaust pressure of the compressor exceeds the preset pressure threshold, the control module 320 adjusts the speed of the fan to increase the speed of the fan so that more hot water is lost to the environment through the heat dissipation component, and the operating speed of the compressor is passively increased to reduce the exhaust pressure of the compressor. Alternatively, the control module 320 combines a variety of the above measures to reduce the exhaust pressure of the compressor, thereby effectively protecting the system operation and meeting the comfort needs of the passengers while giving priority to meeting the manual control needs of the passengers.

[0099] In some embodiments, the operating parameters of the compressor include the operating speed of the compressor, and the control module 320 adjusts the operating parameters of the compressor, specifically for: reducing the operating speed of the compressor 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 the 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.

[0100] 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 components, blowers, and fans, so as to achieve effective protection of the system operation while meeting the comfort needs of passengers.

[0101] 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, the user comfort will be reduced.

[0102] 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.

[0103] 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 external circulation ratio of the fresh air adjustment component is increased, that is, the proportion of the air volume entering the car from outside the car is increased, for example, by increasing the opening of the fresh air adjustment component to increase the outdoor wind entering the car and reduce the wind temperature to increase the heat exchange. 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, the control module 320 adjusts one or more of the operating speed of the compressor, the blower, and the fan.

[0104] 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 the 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.

[0105] 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.

[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 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. Among them, when the fresh air adjustment component is in an 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 can operate safely within a reasonable operating boundary, and at the same time can reduce the perception of the air volume 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 operating speed of the compressor, the blower, the solenoid valve, and the fan; for example, adjusting one or more of the blower and the fan.

[0107] 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 adopts other methods to reduce the exhaust pressure of the compressor, for example, adjusting one or more of the blower, solenoid valve, and fan; for example, adjusting the operating speed of the compressor, the blower, and the fan. In this way, by increasing the external circulation ratio, reducing the inlet air temperature, and reducing the exhaust pressure, the air conditioner can operate safely within a reasonable operating boundary.

[0108] In some embodiments, the control module 320 adjusts the blower, specifically for increasing the air volume 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.

[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 an automatic control state, the air volume of the blower is automatically controlled by the air conditioning system, for example, the air volume 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 volume 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 volume of the blower reaches the maximum air volume, the exhaust pressure of the compressor still exceeds the preset pressure threshold, and the control module 320 then uses other methods to reduce the exhaust pressure of the compressor, for example, adjusting one or more of the operating speed of the compressor, the fresh air adjustment component, and the fan, so as to achieve effective protection of the system operation and meet the comfort needs of the passengers.

[0110] 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.

[0111] In addition, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it can first control one or more of the operating speed of the compressor and the fresh air adjustment component, and then adjust the blower. When the air output of the blower reaches the maximum air output, the exhaust pressure of the compressor still exceeds the preset pressure threshold, or when the blower is in a non-automatic operation state, the control module 320 uses other methods to reduce the exhaust pressure of the compressor, for example, adjusting the fan.

[0112] In some embodiments, the coolant circulation system may further include a solenoid valve disposed at the output end of the warm core water pump, the solenoid valve being used to adjust the coolant flow rate flowing into the heat dissipation component, and the control module 320 is further used to adjust the opening of the solenoid valve.

[0113] Furthermore, in some embodiments, the control module 320 adjusts the solenoid valve, specifically to: increase 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).

[0114] Specifically, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it adjusts the opening of the solenoid valve 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, so that the speed of the compressor is passively increased while keeping the outlet air temperature unchanged, 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, the control module 320 will use other methods to reduce the exhaust pressure of the compressor, for example, adjusting one or more of the operating speed of the compressor, the fresh air adjustment component, the blower, and the fan, so as to achieve effective protection of the system operation and meet the comfort needs of passengers.

[0115] In addition, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it can first control one or more of the operating speed of the compressor, the fresh air adjustment component and the blower, and then adjust the solenoid valve. When the opening of the solenoid valve reaches the maximum opening, 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 the fan.

[0116] In some embodiments, the control module 320 is further configured to: when the opening of the solenoid valve reaches a preset opening threshold, if the blower is in a non-automatic control state, increase the air volume of the blower. The preset opening threshold can be calibrated according to actual conditions, for example, the maximum opening allowed by the solenoid valve.

[0117] Specifically, when adjusting the opening of the solenoid valve, if the opening of the solenoid valve reaches the 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) at this time. For the safe operation of the system, the air volume of the blower is appropriately increased to reduce the exhaust pressure, so that the compressor can operate safely within a reasonable operating boundary. Among them, after passively increasing the air volume of the blower, 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, reducing the target air outlet temperature of the air conditioning system.

[0118] In some embodiments, the control module 320 adjusts the fan, specifically to increase the operating speed of the fan.

[0119] 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, increases the operating speed of the fan, and allows more heat to be dissipated to the environment through the heat dissipation component LTR, so that the speed of the compressor is passively increased while keeping the outlet air temperature unchanged, so that the air conditioner operates safely within a reasonable operating boundary. Among them, when the operating speed of the fan is adjusted to the maximum value, 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 operating speed of the compressor, the fresh air adjustment component, the blower, and the solenoid valve, so as to achieve effective protection of the system operation and meet the comfort needs of the passengers.

[0120] In addition, when the control module 320 determines that the exhaust pressure of the compressor exceeds the preset pressure threshold, it can first control one or more of the operating speed of the compressor, the fresh air adjustment component, the blower and the solenoid valve, and then adjust the fan. When the fan operating speed is adjusted to the maximum value, 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, reducing the target air outlet temperature of the air conditioning system.

[0121] 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.

[0122] In some embodiments, the control module 320 is further configured to: reduce the target air outlet temperature of the air conditioning system.

[0123] That is to say, in the above embodiments, the control strategies are all based on the premise of giving priority to satisfying the manual control needs of passengers (such as low air volume and high air temperature, that is, setting the gear to be low and the target outlet air temperature to be high), and when the manual control needs of passengers cannot be given priority, the air conditioner needs to be operated safely within a reasonable operating boundary. Under the premise of failing to give priority to satisfying the manual control needs of passengers, the control module 320 lowers the target outlet air temperature of the air conditioning system so that the air conditioner operates safely within a reasonable operating boundary.

[0124] In some embodiments, the control module 320 is further used to: determine 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. The preset gear and the preset air outlet temperature can be calibrated according to actual conditions, for example, the preset gear can be the lowest gear.

[0125] 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, a variety of measures or a combination of them are used to effectively protect the operation of the system while meeting the comfort needs of passengers to the greatest extent.

[0126] 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 application, please refer to the details disclosed in the control method of the vehicle thermal management system of the embodiment of the present application, and the details will not be repeated here.

[0127] Corresponding to the above embodiments, the present application also proposes a computer-readable storage medium.

[0128] The computer-readable storage medium of the present application stores a control program of a vehicle thermal management system, and when the control program of the vehicle thermal management system is executed by a processor, the control method of the vehicle thermal management system is implemented.

[0129] Corresponding to the above embodiments, the present application also proposes a vehicle.

[0130] like Figure 7 As shown, the vehicle 400 of the present application includes a memory 410, a processor 420, and a control program of a 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.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. 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 application 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, characterized in that: 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 corresponding to the heat dissipation component, the air conditioning system and the coolant circulation system exchange heat through the heat exchanger, and 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, 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: The fan is adjusted, comprising: Increase the operating speed of the fan.

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

10. The control method according to claim 1, characterized in that: 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, characterized in that: 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 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, 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, characterized in that: A control program of a vehicle thermal management system is stored thereon, and when the control program of the vehicle thermal management system is executed by a processor, a control method of the vehicle thermal management system according to any one of claims 1 to 10 is implemented.

13. A vehicle, characterized in that: The invention comprises a memory, a processor and a control program of a vehicle thermal management system which is stored in the memory and can be run on the processor. When the processor executes the control program of the vehicle thermal management system, the control method of the vehicle thermal management system according to any one of claims 1 to 10 is implemented.

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