Vehicle heat pump system and dehumidification control method and device thereof, vehicle

Abstract

The application discloses a vehicle heat pump system and a dehumidification control method and device thereof and a vehicle. The heat pump system comprises a heat pump circuit, an air heating circuit, a battery heat exchange circuit, an electric drive heat exchange circuit and an environment heat exchange circuit. The method comprises the following steps: in response to a passenger cabin dehumidification instruction of the vehicle, controlling the heat pump circuit to perform refrigeration dehumidification on the passenger cabin and providing heat to the air heating circuit to heat the passenger cabin, and determining a heating capacity; when the heating capacity is sufficient, controlling the air heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit and the environment heat exchange circuit to dissipate heat of the passenger cabin; and when the heating capacity is insufficient, controlling the air heating circuit or the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit and the environment heat exchange circuit to heat the passenger cabin. The dehumidification control method can reduce the energy consumption of the heat pump system and reasonably distribute heat among different circuits of the heat pump system.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a dehumidification control method for a vehicle heat pump system, a vehicle heat pump system, a dehumidification control device for a vehicle heat pump system, and a vehicle. Background Technology

[0002] As the market share of new energy electric vehicles gradually increases, more and more electric vehicles are equipped with heat pump systems as standard to improve energy utilization and reduce overall vehicle power consumption. Current technologies involve heating the passenger compartment after dehumidification via the evaporator to raise the temperature inside. However, this method requires additional electrical energy, increasing the energy consumption of the heat pump system, and it lacks proper heat distribution between different circuits within the heat pump system. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to propose a dehumidification control method for a vehicle heat pump system. By judging the supplementary heating energy, when the supplementary heating capacity is sufficient, the method controls the heating circuit to release heat to at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and environmental heat exchange circuit to dissipate heat from the passenger compartment. Conversely, when the supplementary heating capacity is insufficient, the method controls the heating circuit or heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and environmental heat exchange circuit to supplement heat to the passenger compartment. This reduces the energy consumption of the heat pump system and rationally distributes heat among the different circuits of the heat pump system.

[0004] The second objective of this invention is to provide a vehicle heat pump system.

[0005] The third objective of this invention is to provide a dehumidification control device for a vehicle heat pump system.

[0006] The fourth objective of this invention is to provide a vehicle.

[0007] To achieve the above objectives, a first aspect of the present invention provides a dehumidification control method for a vehicle heat pump system. The heat pump system includes a heat pump circuit, a heating circuit, a battery heat exchange circuit, an electric drive heat exchange circuit, and an environmental heat exchange circuit. The method includes: responding to a dehumidification command for the passenger compartment of the vehicle, controlling the heat pump circuit to perform cooling and dehumidification of the passenger compartment and to provide heat to the heating circuit to supplement the heating of the passenger compartment, and determining the supplementary heating capacity; when the supplementary heating capacity is sufficient, controlling the heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit to dissipate heat from the passenger compartment; when the supplementary heating capacity is insufficient, controlling the heating circuit or the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit to supplement the heating of the passenger compartment.

[0008] According to an embodiment of the present invention, a dehumidification control method for a vehicle heat pump system, in response to a dehumidification command for the passenger compartment, controls the heat pump circuit to perform cooling dehumidification of the passenger compartment and to provide heat to the heating circuit to supplement the passenger compartment's heating capacity, and determines the supplementary heating capacity; when the supplementary heating capacity is sufficient, the heating circuit is controlled to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit to dissipate heat from the passenger compartment; when the supplementary heating capacity is insufficient, the heating circuit or the heat pump circuit is controlled to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit to supplement the passenger compartment's heating capacity. Therefore, this method can reduce the energy consumption of the heat pump system and rationally distribute heat among different circuits of the heat pump system.

[0009] In addition, the dehumidification control method for a vehicle heat pump system according to the above embodiments of the present invention may also have the following additional technical features:

[0010] According to one embodiment of the present invention, determining the heat compensation capacity includes: acquiring the heating water temperature of the heating circuit; determining that the heat compensation capacity is sufficient when the heating water temperature is greater than the target heating water temperature; and determining that the heat compensation capacity is insufficient when the heating water temperature is less than the target heating water temperature.

[0011] According to one embodiment of the present invention, controlling the heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit includes: acquiring the battery temperature of the vehicle; when the battery temperature is less than a first preset battery temperature threshold, controlling the heating circuit to release heat to the battery heat exchange circuit; and when the battery temperature is greater than or equal to the first preset battery temperature threshold, controlling the heating circuit to release heat to the electric drive heat exchange circuit and the ambient heat exchange circuit.

[0012] According to one embodiment of the present invention, controlling the heating circuit or the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit includes: acquiring the battery water temperature of the battery heat exchange circuit and the electric drive water temperature of the electric drive heat exchange circuit; controlling the heating circuit to absorb heat from the battery heat exchange circuit when the battery water temperature is greater than the target heating water temperature; controlling the heating circuit to absorb heat from the electric drive heat exchange circuit when the electric drive water temperature is greater than the target heating water temperature; and controlling the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit when the battery water temperature is less than or equal to the target heating water temperature and the electric drive water temperature is less than or equal to the target heating water temperature.

[0013] According to one embodiment of the present invention, the heat pump circuit includes a first coolant circuit for cooling and dehumidifying the passenger compartment and a second coolant circuit for exchanging heat with the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit, wherein the first coolant circuit and the second coolant circuit are connected, and controlling the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit includes: acquiring the battery temperature of the vehicle; and controlling the first coolant circuit when the battery coolant temperature is greater than or equal to the electric drive coolant temperature and the battery temperature is greater than or equal to a second preset battery temperature threshold. The circuit absorbs heat from the battery heat exchange circuit through the second coolant circuit; when the battery water temperature is greater than or equal to the electric drive water temperature and the battery temperature is less than the second preset battery temperature threshold, or when the battery water temperature is less than the electric drive water temperature, the cooling water temperature and ambient temperature of the second coolant circuit are obtained, wherein when the cooling water temperature is greater than or equal to the ambient temperature, the first coolant circuit is controlled to absorb heat from the electric drive heat exchange circuit through the second coolant circuit; when the cooling water temperature is less than the ambient temperature, the first coolant circuit is controlled to absorb heat from both the electric drive heat exchange circuit and the ambient heat exchange circuit through the second coolant circuit.

[0014] According to one embodiment of the present invention, the first coolant circuit includes: a compressor, a water-cooled condenser, an evaporator, and a first throttling element. The discharge port of the compressor is connected to a first end of the water-cooled condenser, a second end of the water-cooled condenser is connected to a first end of the first throttling element, the other end of the first throttling element is connected to a first end of the evaporator, and the other end of the evaporator is connected to the return port of the compressor. The first coolant circuit is used to control the compressor and the first throttling element to cool and dehumidify the passenger compartment. The second coolant circuit includes: a heat exchanger and a second throttling element. One end of the second throttling element is connected to a second end of the water-cooled condenser and a first end of the first throttling element, respectively. The other end of the second throttling element is connected to a first end of the heat exchanger, the second end of the heat exchanger is connected to a second end of the evaporator and the return port of the compressor, a third end of the heat exchanger is connected to a first end of the nine-way valve of the heat pump system, and a fourth end of the heat exchanger is connected to a second end of the nine-way valve. The first coolant circuit is used to control the second throttling element and the nine-way valve to cool and dehumidify the passenger compartment. The coolant circuit absorbs heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit through the second coolant circuit; the warm air circuit includes: a warm air core and a warm air water pump, the warm air core is arranged corresponding to the evaporator, one end of the warm air core is connected to the third end of the water-cooled condenser, the other end of the warm air core is connected to one end of the warm air water pump, the other end of the warm air water pump is connected to the fourth end of the water-cooled condenser, the third end of the water-cooled condenser is connected to the first end of the three-way valve of the heat pump system, and the three-way valve... The second end is connected to one end of the heater core, the third end of the three-way valve is connected to the third end of the nine-way valve, and the fourth end of the nine-way valve is connected to one end of the heater water pump and the other end of the heater core. The nine-way valve and the three-way valve are controlled to supply heat from the first coolant circuit to the heater circuit to supplement the heat to the passenger compartment, and to control the heater circuit to absorb heat from the battery heat exchange circuit or the electric drive heat exchange circuit, or to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit.

[0015] According to one embodiment of the present invention, the battery heat exchange circuit includes: a battery water pump and a battery heat exchange assembly, one end of the battery water pump is connected to the fifth end of the nine-way valve, the other end of the battery water pump is connected to one end of the battery heat exchange assembly, and the other end of the battery heat exchange assembly is connected to the sixth end of the nine-way valve; the electric drive heat exchange circuit includes: an electric drive water pump and an electric drive heat exchange assembly, one end of the electric drive water pump is connected to the seventh end of the nine-way valve, the other end of the electric drive water pump is connected to one end of the electric drive heat exchange assembly, and the other end of the electric drive heat exchange assembly is connected to the eighth end of the nine-way valve; the environmental heat exchange circuit includes: a radiator, one end of the radiator is connected to the ninth end of the nine-way valve, and the other end of the radiator is connected to the seventh end of the nine-way valve and one end of the electric drive water pump, respectively.

[0016] To achieve the above objectives, a second aspect of the present invention provides a vehicle heat pump system, including a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements the dehumidification control method of the vehicle heat pump system described above.

[0017] According to an embodiment of the present invention, by executing the above-described dehumidification control method for a vehicle heat pump system, the energy consumption of the heat pump system can be reduced, and the heat can be rationally distributed among different circuits of the heat pump system.

[0018] To achieve the above objectives, a third aspect of the present invention provides a dehumidification control device for a vehicle heat pump system. The heat pump system includes a heat pump circuit, a heating circuit, a battery heat exchange circuit, an electric drive heat exchange circuit, and an environmental heat exchange circuit. The device includes: a determining module for determining the heat replenishment capacity; and a control module for responding to a dehumidification command for the passenger compartment of the vehicle, controlling the heat pump circuit to perform cooling and dehumidification of the passenger compartment and to provide heat to the heating circuit to replenish the passenger compartment. When the heat replenishment capacity is sufficient, the control module controls the heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit to dissipate heat from the passenger compartment. When the heat replenishment capacity is insufficient, the control module controls the heating circuit or the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit to replenish the passenger compartment.

[0019] According to an embodiment of the present invention, a dehumidification control device for a vehicle heat pump system includes a determining module for determining the heat replenishment capacity, and a control module for responding to a vehicle's passenger compartment dehumidification command. The control module controls the heat pump circuit to perform cooling and dehumidification of the passenger compartment and to provide heat to the heating circuit to replenish the passenger compartment. When the heat replenishment capacity is sufficient, the control module controls the heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit to dissipate heat from the passenger compartment. When the heat replenishment capacity is insufficient, the control module controls the heating circuit or the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit to replenish the passenger compartment. Therefore, this device can reduce the energy consumption of the heat pump system and rationally distribute heat among different circuits of the heat pump system.

[0020] To achieve the above objectives, a vehicle is provided in a fourth aspect of the present invention, comprising: the vehicle heat pump system described above, or a dehumidification control device for the vehicle heat pump system described above.

[0021] According to embodiments of the present invention, a vehicle including the vehicle heat pump system described above, or the dehumidification control device of the vehicle heat pump system described above, can reduce the energy consumption of the heat pump system and rationally distribute heat between different circuits of the heat pump system.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] Figure 1 A flowchart of a dehumidification control method for a vehicle heat pump system according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a heat pump system according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the operation of each circuit of a heat pump system when the heat replenishment capacity is sufficient, according to an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the operation of each circuit of a heat pump system when the heat replenishment capacity is sufficient, according to another embodiment of the present invention.

[0027] Figure 5 A schematic diagram of the operation of each circuit when the heat pump system's heat compensation capacity is insufficient, according to an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the operation of each circuit when the heat pump system's heat compensation capacity is insufficient, according to another embodiment of the present invention.

[0029] Figure 7A schematic diagram of the operation of each circuit when the heat pump system of the present invention has insufficient heat compensation capacity according to another embodiment of the present invention;

[0030] Figure 8 A schematic diagram of the operation of each circuit when the heat pump system of the present invention has insufficient heat compensation capacity according to another embodiment of the present invention;

[0031] Figure 9 A schematic diagram of the operation of each circuit when the heat pump system of the present invention has insufficient heat compensation capacity according to another embodiment of the present invention;

[0032] Figure 10 A flowchart of a dehumidification control method for a vehicle heat pump system according to a specific example of the present invention;

[0033] Figure 11 This is a block diagram of a vehicle heat pump system according to an embodiment of the present invention;

[0034] Figure 12 This is a block diagram of a dehumidification control device for a vehicle heat pump system according to an embodiment of the present invention.

[0035] Figure 13 A schematic block diagram of a vehicle according to an embodiment of the present invention;

[0036] Figure 14 This is a block diagram of a vehicle according to another embodiment of the present invention.

[0037] Figure label:

[0038] First coolant circuit 10; compressor 11; water-cooled condenser 12, evaporator 13 and first throttling element 14;

[0039] Second coolant circuit 20; heat exchanger 21; second throttling element 22;

[0040] 30; 31; 32; Heating circuit;

[0041] Nine-way valve 40; Three-way valve 50;

[0042] Battery heat exchange circuit 60; Battery water pump 61;

[0043] Electric-driven heat exchange circuit 70; electric-driven water pump 71;

[0044] Ambient heat exchange circuit 80; radiator 81;

[0045] Vehicle heat pump system 200; memory 210; processor 220;

[0046] Dehumidification control device 100 for vehicle heat pump system; determination module 110; control module 120;

[0047] Vehicle 300. Detailed Implementation

[0048] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0049] The following description, with reference to the accompanying drawings, illustrates the dehumidification control method for a vehicle heat pump system, the vehicle heat pump system, the dehumidification control device for the vehicle heat pump system, and the vehicle according to embodiments of the present invention.

[0050] Figure 1 This is a flowchart of a dehumidification control method for a vehicle heat pump system according to an embodiment of the present invention.

[0051] like Figure 1 As shown, the dehumidification control method of the vehicle heat pump system in this embodiment of the invention may include the following steps:

[0052] S1, in response to the vehicle's passenger compartment dehumidification command, controls the heat pump circuit to cool and dehumidify the passenger compartment and to provide heat to the heating circuit to supplement the passenger compartment, and determines the supplementary heating capacity.

[0053] S2, when the heat replenishment capacity is sufficient, controls the heating circuit to release heat to at least one of the battery heat exchange circuit, electric drive heat exchange circuit and ambient heat exchange circuit to dissipate heat from the occupant compartment.

[0054] S3, when the heat replenishment capacity is insufficient, controls the heating circuit or heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, electric drive heat exchange circuit and ambient heat exchange circuit to replenish the heat of the crew compartment.

[0055] Specifically, drivers or passengers can select the dehumidification function via the vehicle's air conditioning control panel. Additionally, some vehicles are equipped with intelligent or automatic air conditioning systems that automatically adjust their operating modes, including dehumidification, based on the humidity and temperature inside the vehicle. This requires no manual setting and is activated automatically based on perceived environmental conditions. Some vehicles may also feature a remote control system, allowing users to pre-activate the vehicle's air conditioning system via a mobile app or other remote means, thus initiating dehumidification before entering the vehicle. Heat pump systems utilize reversible thermodynamic principles to transfer heat between indoor and outdoor environments as needed. In summer, a heat pump system transfers heat from indoors to outdoors, achieving cooling. In winter, it extracts heat from outdoors and transfers it indoors, achieving heating. Therefore, a heat pump system not only includes the cooling function of a traditional air conditioning system but also has heating capabilities, making it more comprehensive and multifunctional in temperature regulation. Compared to traditional air conditioning systems, heat pump systems are more energy-efficient because they utilize heat from the environment for heating or cooling, rather than simply generating heat or cold.

[0056] A heat pump system may include a heat pump circuit, a heating circuit, a battery heat exchange circuit, an electric drive heat exchange circuit, and an environmental heat exchange circuit. The heat pump circuit, through the flow of refrigerant, can be used to cool and dehumidify the vehicle interior. The heating circuit, through the flow of coolant, can be used to heat the vehicle interior. The electric drive heat exchange circuit and the battery heat exchange circuit are the circuits where the electric drive and battery are located, respectively, and heat is generated when the electric drive or battery is working, which can be stored in their respective coolant circuits. The environmental heat exchange circuit allows the coolant to exchange heat with the outside air.

[0057] In response to the vehicle's passenger compartment dehumidification command, the heat pump circuit can be controlled to cool and dehumidify the passenger compartment and provide heat to the heating circuit to supplement the passenger compartment's temperature. That is, in the heat pump circuit, the passenger compartment is cooled and dehumidified through heat exchange with the refrigerant. During this process, although the humidity in the passenger compartment is reduced, the temperature of the passenger compartment also decreases, which can easily make users feel cold in spring and autumn. Therefore, the heat pump circuit can provide heat to the heating circuit to supplement the passenger compartment's temperature. Furthermore, when supplementing the passenger compartment's temperature, it is necessary to determine the supplementary heating capacity. That is, when the supplementary heating capacity is sufficient, it means that the current heat pump circuit has enough heat to provide heat to the heating circuit; when the supplementary heating capacity is insufficient, it means that the current heat pump circuit does not have enough heat to provide heat to the heating circuit.

[0058] Therefore, when the heat replenishment capacity is sufficient, the heating circuit can be controlled to release heat to at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and environmental heat exchange circuit to dissipate heat from the passenger compartment. When the heat replenishment capacity is sufficient, it means that the current heat pump circuit has enough heat to provide heat to the heating circuit. Therefore, the remaining heat can be released to one or more of the battery heat exchange circuit, electric drive heat exchange circuit, and environmental heat exchange circuit. For example, when releasing heat to the battery circuit, the coolant temperature of the battery circuit can be increased, thereby maintaining the battery temperature in a high-efficiency discharge range. This reduces the amount of heat supplied to the heating circuit, allowing for better heat dissipation from the passenger compartment and preventing overheating.

[0059] When the heat exchange capacity is insufficient, the heating circuit or heat pump circuit can absorb heat from at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and ambient heat exchange circuit to supplement the heat for the passenger compartment. That is, when the heat exchange capacity is insufficient, it means that the current heat pump circuit does not have enough heat to provide heat to the heating circuit. Therefore, heat can be released to the heating circuit through one or more of the battery heat exchange circuit, electric drive heat exchange circuit, and ambient heat exchange circuit, increasing the temperature of the coolant in the heating circuit to supplement the heat for the passenger compartment. Alternatively, heat can be released to the heat pump circuit through one or more of the battery heat exchange circuit, electric drive heat exchange circuit, and ambient heat exchange circuit, providing heat to the heating circuit through the heat pump circuit to supplement the heat for the passenger compartment. Therefore, in dehumidification mode, there is no need to add heating devices for heat replenishment. When the heat in the passenger cabin is insufficient, it can absorb heat from the electric drive, battery, and environment for heat replenishment. When the heat in the passenger cabin is sufficient, the heat can be stored in the battery heat exchange circuit to avoid heat waste, or stored in the electric drive heat exchange circuit, or excess heat can be dissipated through the environment. This reduces the energy consumption of the heat pump system and allows for the rational distribution of heat between different circuits of the heat pump system.

[0060] According to one embodiment of the present invention, determining the heat compensation capacity includes: obtaining the heating water temperature of the heating circuit; determining that the heat compensation capacity is sufficient when the heating water temperature is greater than the target heating water temperature; and determining that the heat compensation capacity is insufficient when the heating water temperature is less than the target heating water temperature.

[0061] Specifically, when determining the heating capacity, the temperature of the heating water in the heating circuit and the target heating water temperature can be compared to determine whether the heating capacity is sufficient. For example, a temperature sensor can be installed in the heating circuit to obtain the heating water temperature. The target heating water temperature can be determined based on the set temperature of the passenger compartment. For instance, a preset relationship table can be used to store multiple target heating water temperatures and the set temperature of the passenger compartment, with a one-to-one correspondence between the target heating water temperature and the set temperature. After determining a set temperature, a target heating water temperature can be determined. When the heating water temperature is higher than the target heating water temperature, it indicates that the current heating water temperature is high, and the current heating capacity is sufficient. When the heating water temperature is lower than the target heating water temperature, it indicates that the current heating water temperature is low, and the current heating energy is insufficient.

[0062] According to one embodiment of the present invention, controlling the heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit includes: acquiring the battery temperature of the vehicle; when the battery temperature is lower than a first preset battery temperature threshold, controlling the heating circuit to release heat to the battery heat exchange circuit; and when the battery temperature is greater than or equal to the first preset battery temperature threshold, controlling the heating circuit to release heat to both the electric drive heat exchange circuit and the ambient heat exchange circuit. The first preset battery temperature threshold can be determined according to actual conditions; for example, the first preset battery temperature threshold can be 25 degrees Celsius.

[0063] Specifically, when controlling the heating circuit to release heat to at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and ambient heat exchange circuit, the vehicle's battery temperature is first acquired, and the relationship between the battery temperature and a first preset battery temperature threshold is determined. When the battery temperature is lower than the first preset battery temperature threshold, it indicates that the current battery temperature is low. Prolonged exposure to a low temperature may weaken the battery's ability to store and release electrical energy. Therefore, the heating circuit can be controlled to release heat to the battery heat exchange circuit, supplementing the heat in the battery heat exchange circuit and thus raising the battery temperature to maintain it within the high-efficiency discharge range. When the battery temperature is greater than or equal to the first preset battery temperature threshold, it indicates that the current battery temperature is high, and it is unnecessary to release heat to the battery heat exchange circuit to avoid adverse effects on battery life from prolonged high temperatures, which could potentially cause safety issues in extreme cases. Therefore, the heating circuit can be controlled to release heat to the electric drive heat exchange circuit and the ambient heat exchange circuit to dissipate heat from the passenger compartment.

[0064] According to one embodiment of the present invention, controlling a heating circuit or a heat pump circuit to absorb heat from at least one of a battery heat exchange circuit, an electric drive heat exchange circuit, and an ambient heat exchange circuit includes: acquiring the battery water temperature of the battery heat exchange circuit and the electric drive water temperature of the electric drive heat exchange circuit; controlling the heating circuit to absorb heat from the battery heat exchange circuit when the battery water temperature is greater than the target heating water temperature; controlling the heating circuit to absorb heat from the electric drive heat exchange circuit when the electric drive water temperature is greater than the target heating water temperature; and controlling the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit when the battery water temperature is less than or equal to the target heating water temperature and the electric drive water temperature is less than or equal to the target heating water temperature.

[0065] Specifically, when controlling the heating circuit or heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and ambient heat exchange circuit, the battery water temperature of the battery heat exchange circuit and the electric drive water temperature of the electric drive heat exchange circuit are first obtained. The relationship between the battery water temperature and the target heating water temperature, as well as the relationship between the electric drive water temperature and the target heating water temperature, are then determined. When the battery water temperature is higher than the target heating water temperature, it indicates that the current temperature of the battery heat exchange circuit is higher, and heat can be released from the battery heat exchange circuit to the heating circuit, thereby supplementing the heat to the passenger compartment. When the electric drive water temperature is higher than the target heating water temperature, it indicates that the current temperature of the electric drive heat exchange circuit is higher, and heat can be released from the electric drive heat exchange circuit to the heating circuit, thereby supplementing the heat to the passenger compartment.

[0066] It should be noted that when both the battery coolant temperature and the electric drive coolant temperature are higher than the target heater core temperature, the differences between the battery coolant temperature and the target heater core temperature can be compared with the differences between the electric drive coolant temperature and the target heater core temperature. When the difference between the battery coolant temperature and the target heater core temperature is greater than the difference between the electric drive coolant temperature and the target heater core temperature, it indicates that the battery heat exchange circuit can provide more heat, and the heater core circuit can be prioritized to absorb heat from the battery heat exchange circuit. Conversely, when the difference between the electric drive coolant temperature and the target heater core temperature is greater than the difference between the battery coolant temperature and the target heater core temperature, it indicates that the electric drive heat exchange circuit can provide more heat, and the heater core circuit can be prioritized to absorb heat from the electric drive heat exchange circuit. Therefore, the passenger compartment can be supplemented with heat through either the electric drive heat exchange circuit or the battery heat exchange circuit, while also reducing the operating power of the compressor in the heat pump circuit.

[0067] When the battery water temperature is less than or equal to the target heater water temperature and the electric drive water temperature is less than or equal to the target heater water temperature, the heat pump circuit can be controlled to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit. In other words, when the current battery water temperature and electric drive water temperature are moderate or low, heat can be absorbed from one or more of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit through the heat pump circuit. For example, the heat pump circuit can be controlled to absorb heat from the battery circuit and the ambient heat exchange circuit, or the heat pump circuit can be controlled to absorb heat from the electric drive circuit and the ambient circuit.

[0068] According to one embodiment of the present invention, a heat pump circuit includes a first coolant circuit for cooling and dehumidifying the passenger compartment and a second coolant circuit for exchanging heat with a battery heat exchange circuit, an electric drive heat exchange circuit, and an environmental heat exchange circuit, wherein the first coolant circuit and the second coolant circuit are connected, and controlling the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit includes: acquiring the vehicle's battery temperature; when the battery coolant temperature is greater than or equal to the electric drive coolant temperature and the battery temperature is greater than or equal to a second preset battery temperature threshold, controlling the first coolant circuit to absorb heat from the battery heat exchange circuit through the second coolant circuit; when the battery coolant temperature is greater than or equal to the electric drive coolant temperature and the battery temperature is less than the second preset battery temperature threshold, or when the battery coolant temperature is less than the electric drive coolant temperature, acquiring the cooling water temperature of the second coolant circuit and the ambient temperature, wherein when the cooling water temperature is greater than or equal to the ambient temperature, controlling the first coolant circuit to absorb heat from the electric drive heat exchange circuit through the second coolant circuit; and when the cooling water temperature is less than the ambient temperature, controlling the first coolant circuit to absorb heat from both the electric drive heat exchange circuit and the environmental heat exchange circuit through the second coolant circuit. The second preset battery temperature threshold can be determined according to the actual situation. For example, the second preset battery temperature threshold can be 10 degrees Celsius.

[0069] Specifically, the heat pump circuit can be divided into two circuits, namely the first coolant circuit and the second coolant circuit. The first coolant circuit can be used to cool and dehumidify the passenger compartment, and the second coolant circuit can be used to absorb heat from one or more of the battery heat exchange circuit, the electric drive heat exchange circuit and the environmental heat exchange circuit. The first coolant circuit and the second coolant circuit are interconnected.

[0070] When absorbing heat from at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and ambient heat exchange circuit via the heat pump circuit, the vehicle's battery temperature is first acquired, for example, through the vehicle's battery management system. The relationship between the battery coolant temperature and the electric drive coolant temperature, as well as the relationship between the battery coolant temperature and a second preset battery temperature threshold, are then determined. If both the battery coolant temperature and the electric drive coolant temperature are greater than or equal to the second preset battery temperature threshold, it indicates that the current battery heat exchange circuit still has sufficient heat for the heat pump circuit to absorb. Therefore, the first coolant circuit can be controlled to absorb heat from the battery heat exchange circuit through the second coolant circuit to supplement the passenger compartment's heat supply, and the fan in the electric drive heat exchange circuit can be prevented from starting, reducing low-voltage power consumption.

[0071] When the battery coolant temperature is greater than or equal to the electric drive coolant temperature and the battery temperature is less than the second preset battery temperature threshold, or when the battery coolant temperature is less than the electric drive coolant temperature, it indicates that the current battery heat exchange circuit can provide less heat. The coolant temperature of the second coolant circuit and the ambient temperature can be obtained, and the relationship between the coolant temperature and the ambient temperature can be determined. When the coolant temperature is greater than or equal to the ambient temperature, it indicates that the current coolant temperature is high, and the first coolant circuit can be controlled to absorb heat from the electric drive heat exchange circuit through the second coolant circuit. When the coolant temperature is less than the ambient temperature, it indicates that the current coolant temperature is low, and the first coolant circuit can be controlled to absorb heat from the electric drive heat exchange circuit and the ambient heat exchange circuit through the second coolant circuit. It should be noted that the absorption of heat from the electric drive heat exchange circuit and the ambient heat exchange circuit is prioritized when the vehicle is in motion, which can reduce the operating power of the electric drive circuit fan.

[0072] According to one embodiment of the present invention, such as Figure 2As shown, the first coolant circuit 10 includes: a compressor 11, a water-cooled condenser 12, an evaporator 13, and a first throttling element 14. The exhaust port of the compressor 11 is connected to the first end of the water-cooled condenser 12, the second end of the water-cooled condenser 12 is connected to one end of the first throttling element 14, the other end of the first throttling element 14 is connected to one end of the evaporator 13, and the other end of the evaporator 13 is connected to the return port of the compressor 11. The first coolant circuit 10 is used to cool and dehumidify the passenger compartment by controlling the compressor 11 and the first throttling element 14. The second coolant circuit... 20 includes: a heat exchanger 21 and a second throttling element 22. One end of the second throttling element 22 is connected to the second end of the water-cooled condenser 12 and one end of the first throttling element 14, respectively. The other end of the second throttling element 22 is connected to the first end of the heat exchanger 21. The second end of the heat exchanger 21 is connected to the other end of the evaporator 13 and the return port of the compressor 11, respectively. The third end of the heat exchanger 21 is connected to the first end of the nine-way valve 40, and the fourth end of the heat exchanger 21 is connected to the second end of the nine-way valve 40. The first cooling... The liquid circuit 10 absorbs heat from at least one of the battery heat exchange circuit 60, the electric drive heat exchange circuit 70, and the ambient heat exchange circuit 80 through the second coolant circuit 20; the warm air circuit 30 includes: a warm air core 31 and a warm air water pump 32. The warm air core 31 is disposed corresponding to the evaporator 13. One end of the warm air core 31 is connected to the third end of the water-cooled condenser 12, and the other end of the warm air core 31 is connected to one end of the warm air water pump 32. The other end of the warm air water pump 32 is connected to the fourth end of the water-cooled condenser 12. The third end of the water-cooled condenser 12 is connected to the first end of the three-way valve 50. The second end of the valve is connected to one end of the heater core 31, the third end of the three-way valve 50 is connected to the third end of the nine-way valve 40, and the fourth end of the nine-way valve 40 is connected to one end of the heater water pump 32 and the other end of the heater core 31, respectively. The nine-way valve 40 and the three-way valve 50 are controlled to provide heat to the heater circuit 30 from the first coolant circuit 10 to supplement the heat of the passenger compartment, and to absorb heat from the battery heat exchange circuit 60 or the electric drive heat exchange circuit 70, or to release heat to at least one of the battery heat exchange circuit 60, the electric drive heat exchange circuit 70 and the ambient heat exchange circuit 80.

[0073] Specifically, the refrigerant flows through the first coolant circuit 10. When cooling and dehumidifying the passenger compartment, the compressor 11 and the first throttling element 14 can be controlled. The first throttling element 14 can be an expansion valve. Cooling and dehumidifying the passenger compartment can be achieved by turning on the compressor 11 and adjusting the opening of the expansion valve. Specifically, in the evaporator 13, the refrigerant enters at low pressure, absorbing heat from the passenger compartment air and evaporating into low-temperature, low-pressure vapor. This process causes the evaporator surface to cool, and the moisture in the humid air condenses into liquid water. Then, the low-temperature, low-pressure refrigerant vapor is drawn into the compressor 11, which compresses it into a high-temperature, high-pressure gas. This process causes the temperature and pressure of the refrigerant to rise. The high-temperature, high-pressure refrigerant gas then flows to the water-cooled condenser 12. In the water-cooled condenser 12, the refrigerant dissipates heat, cooling it and transforming it into a high-pressure liquid. The high-pressure liquid refrigerant is slowed and depressurized by the first throttling element 14, transforming into a low-pressure liquid and re-entering the evaporator 13. This process is repeated cyclically, achieving both cooling and dehumidification. Similarly, the refrigerant can flow in the second coolant circuit 20 and complete heat exchange through the heat exchanger 21, compressor 11, water-cooled condenser 12 and second throttling element 22.

[0074] When the refrigerant passes through the water-cooled condenser 12, it releases heat, thereby raising the temperature of the coolant in the heating circuit 30. This allows the heating water pump 32 to operate continuously, ensuring the coolant in the heating circuit 30 flows continuously. As the coolant flows through the heating core 31, it raises the temperature of the passenger compartment, preventing excessive temperature fluctuations during dehumidification. Furthermore, when comparing the temperature of the heating water in the heating circuit 30 with the target temperature, if the heating water temperature is the same as the target temperature, it indicates that the temperature reduction in the passenger compartment after cooling and dehumidifying by the heat pump circuit and the temperature increase from providing heat to the heating circuit to replenish the passenger compartment are in equilibrium. The current heat transfer path is: evaporator heat absorption -> water-cooled condenser heat release -> heating core heat release.

[0075] Furthermore, according to one embodiment of the present invention, continued reference... Figure 2As shown, the battery heat exchange circuit 60 includes: a battery water pump 61 and a battery heat exchange assembly (not shown in the figure). One end of the battery water pump 61 is connected to the fifth end of the nine-way valve 40, and the other end of the battery water pump 61 is connected to one end of the battery heat exchange assembly. The other end of the battery heat exchange assembly is connected to the sixth end of the nine-way valve 40. The electric drive heat exchange circuit 70 includes: an electric drive water pump 71 and an electric drive heat exchange assembly (not shown in the figure). One end of the electric drive water pump 71 is connected to the seventh end of the nine-way valve 40, and the other end of the electric drive water pump 71 is connected to one end of the electric drive heat exchange assembly. The other end of the electric drive heat exchange assembly is connected to the eighth end of the nine-way valve 40. The ambient heat exchange circuit 80 includes: a radiator 81. One end of the radiator 81 is connected to the ninth end of the nine-way valve 40, and the other end of the radiator 81 is connected to the seventh end of the nine-way valve 40 and one end of the electric drive water pump 71, respectively.

[0076] Specifically, if the current heater coolant temperature of the heater circuit 30 is higher than the target heater coolant temperature, it indicates that the current heat replenishment capacity is sufficient. The heater circuit 30 can then release heat to at least one of the battery heat exchange circuit 60, electric drive heat exchange circuit 70, and ambient heat exchange circuit 80 to dissipate heat from the passenger compartment. Taking a first preset battery temperature threshold of 25 degrees Celsius as an example, when the vehicle's battery temperature is greater than or equal to this threshold, it indicates that the current battery temperature is high, and there is no need to transfer excess heat from the passenger compartment to the battery heat exchange circuit 60. Therefore, the third, fourth, eighth, and ninth terminals of the nine-way valve 40, and the first, second, and third terminals of the three-way valve 50, can be controlled to open. (Refer to...) Figure 3 As shown, excess heat can be transferred to the electric drive cooling circuit 70 and the ambient cooling circuit 80 after passing through the water-cooled condenser 12, three-way valve 50, and nine-way valve 40. The heat transfer path is: passenger compartment heat -> evaporator 13 heat absorption -> water-cooled condenser 12 heat release -> heater core 31 & electric drive cooling circuit 70 + ambient cooling circuit 80. The '&' symbol indicates that part of the heat is transferred to the heater core 31, and the other part is transferred to the electric drive cooling circuit 70 and the ambient cooling circuit 80. If the current heater coolant temperature in the heating circuit is higher than the target heater coolant temperature, and the vehicle's battery temperature is lower than the first preset battery temperature threshold of 25 degrees Celsius, it indicates that the current vehicle battery temperature is low. In this case, excess heat from the passenger compartment can be preferentially transferred to the battery heat exchange circuit 60 to keep the battery in a high-efficiency discharge region. Therefore, this can be achieved by controlling the third, fourth, fifth, and sixth terminals of the nine-way valve 40 and the first, second, and third terminals of the three-way valve 50. (Refer to...) Figure 4As shown, excess heat can be transferred to the battery heat exchange circuit 60 after passing through the water-cooled condenser 12, three-way valve 50, and nine-way valve 40. The heat transfer path is: crew compartment heat -> evaporator 13 heat absorption -> water-cooled condenser 12 heat release -> heater core 31 & battery heat exchange circuit 60. The '&' symbol indicates that part of the heat is transferred to the heater core 31, and the other part is transferred to the battery heat exchange circuit 60. The battery water pump 61 and battery heat exchange components, as well as the electrically driven water pump 71 and electrically driven heat exchange components, can circulate coolant and perform corresponding heat exchange in their respective circuits.

[0077] In addition, when releasing heat to at least one of the battery heat exchange circuit 60, electric drive heat exchange circuit 70 and ambient heat exchange circuit 80, the amount of heat transferred can be determined by adjusting the opening of the three-way valve 50. The opening of the three-way valve 50 can be adjusted based on the difference between the heating water temperature and the target heating water temperature. For example, if the heating water temperature exceeds the target heating water temperature by a large margin, the opening of the three-way valve 50 can be adjusted further to transfer the excess heat.

[0078] If the current heating water temperature in the heating circuit 30 is lower than the target heating water temperature, it indicates insufficient heat replenishment capacity. In this case, the heating circuit 30 or heat pump circuit 10 can be controlled to absorb heat from at least one of the battery heat exchange circuit 60, electric drive heat exchange circuit 70, and ambient heat exchange circuit 80 to replenish heat to the passenger compartment. When the electric drive inlet water temperature is higher than the target heating water inlet temperature, it indicates that the current temperature of the electric drive cooling water circuit 70 is too high. In this case, the third, fourth, seventh, and eighth terminals of the nine-way valve 40 and the first, second, and third terminals of the three-way valve 50 can be controlled to open. (Refer to...) Figure 5 As shown, the heat from the electric drive heat exchange circuit 70 can be transferred to the water-cooled condenser 12 via the electric drive water pump 71, electric drive heat exchange components, nine-way valve 40, and heater pump 32. The heat transfer path is: crew compartment heat -> evaporator 13 heat absorption -> (water-cooled condenser 12 heat release + electric drive heat dissipation circuit 60 heat release) -> heater core 31 heat release. When the battery inlet water temperature is higher than the target heater inlet water temperature, it indicates that the current temperature of the battery heat dissipation circuit 60 is high. The third, fourth, fifth, and sixth terminals of the nine-way valve 40 can be controlled to open, as well as the first, second, and third terminals of the three-way valve 50 can be controlled to open. (Refer to...) Figure 6 As shown, the heat from the battery heat exchange circuit 60 can be transferred to the water-cooled condenser 12 via the battery water pump 61, battery heat exchange components, nine-way valve 40, and heater water pump 32. That is, the heat transfer path is: crew compartment heat -> evaporator 13 heat absorption -> (water-cooled condenser 12 heat release + battery heat exchange circuit 60 heat release) -> heater core 31 heat release.

[0079] When the electric drive coolant temperature is less than or equal to the target heater coolant temperature, and the battery coolant temperature is less than or equal to the target heater coolant temperature, the vehicle's battery temperature is obtained. Taking a second preset battery temperature threshold of 10 degrees Celsius as an example, when the battery coolant temperature is greater than or equal to the electric drive coolant temperature, and the battery temperature is greater than or equal to the second preset battery temperature threshold, the first coolant circuit 10 can be controlled to absorb heat from the battery heat exchange circuit 60 through the second coolant circuit 20. This allows control of the first, second, fifth, and sixth terminals of the nine-way valve 40 to be open, as well as the first and second terminals of the three-way valve 50 to be open. (Refer to...) Figure 7 As shown, the heat from the battery heat exchange circuit 60 can pass through the battery water pump 61, the electric drive heat exchange assembly, and the nine-way valve 40 to the heat exchanger 21. That is, the heat transfer path is (heat release from battery heat exchange circuit 60 -> heat exchanger 21) & (heat from crew compartment -> heat absorption from evaporator 13) -> heat release from water-cooled condenser 12 -> heat release from heater core 31.

[0080] When the battery coolant temperature is lower than the electric drive coolant temperature, or when the battery coolant temperature is greater than or equal to the electric drive coolant temperature and the battery temperature is lower than the second preset battery temperature threshold, the cooling water temperature and ambient temperature of the second coolant circuit are obtained. When the cooling water temperature is greater than or equal to the ambient temperature, the first coolant circuit 10 can be controlled to absorb heat from the electric drive heat exchange circuit 70 through the second coolant circuit 20. This allows control of the first, second, seventh, and eighth terminals of the nine-way valve 40 to be open, as well as the first and second terminals of the three-way valve 50 to be open. (Refer to...) Figure 8 As shown, the heat from the electric drive heat exchange circuit 70 can pass through the electric drive water pump 61, the electric drive heat exchange assembly, and the nine-way valve 40 to the heat exchanger 21. The heat transfer path is (heat release from the electric drive heat exchange circuit 70 -> heat exchanger 21) & (passenger compartment heat -> heat absorption by the evaporator 13) -> heat release from the water-cooled condenser 12 -> heat release from the heater core 31. When the cooling water temperature is lower than the ambient temperature, the first coolant circuit 10 can be controlled to absorb heat from the electric drive heat exchange circuit 70 and the ambient heat exchange circuit 80 through the second coolant circuit 20. This allows control of the first, second, eighth, and ninth ends of the nine-way valve 40, as well as the first and second ends of the three-way valve 50. (Refer to...) Figure 9 As shown, the heat from the electric drive heat exchange circuit 70 and the heat from the ambient heat dissipation circuit 80 can pass through the electric drive water pump 71, the electric drive heat exchange component, the radiator 81, and the nine-way valve 40 to the heat exchanger 21. That is, the heat transfer path is (heat release from the ambient heat exchange circuit 80 + heat release from the electric drive heat exchange circuit 70 -> heat exchanger 21) & (heat from the crew compartment -> heat absorption from the evaporator 13) -> heat release from the water-cooled condenser 12 -> heat release from the heater core 31.

[0081] The following is combined Figure 10 The dehumidification control method of the present invention will be described below.

[0082] As a specific example, the dehumidification control method of the vehicle heat pump system of the present invention may include the following steps:

[0083] S101, in response to the vehicle's passenger compartment dehumidification command, controls the heat pump circuit to cool and dehumidify the passenger compartment and to provide heat to the heating circuit to supplement the passenger compartment with heat.

[0084] S102, obtain the heating water temperature of the heating circuit.

[0085] S103, determine whether the heater water temperature is higher than the target heater water temperature. If yes, proceed to step S104; if no, proceed to step S108.

[0086] S104, obtain the vehicle's battery temperature.

[0087] S105, determine whether the battery temperature is lower than the first preset battery temperature threshold. If yes, proceed to step S106; if no, proceed to step S107.

[0088] S106 controls the heat exchange circuit to release heat to the battery heat exchange circuit.

[0089] S107 controls the release of heat from the heating circuit to the electric drive heat exchange circuit and the ambient heat exchange circuit.

[0090] S108, obtain the battery water temperature of the battery heat exchange circuit and the electric drive water temperature of the electric drive heat exchange circuit, and proceed to steps S109 and S114.

[0091] S109, determine whether the electric drive water temperature is greater than the target heater water temperature. If yes, proceed to step S110; if no, proceed to step S111.

[0092] S110 controls the heating circuit to absorb heat from the electric drive heat exchange circuit.

[0093] S111, determine whether the battery water temperature is greater than or equal to the electric drive water temperature. If yes, proceed to step S112; if no, proceed to step S116.

[0094] S112, determine whether the battery temperature is greater than or equal to the second preset battery temperature threshold. If yes, proceed to step S113; if no, proceed to step S116.

[0095] S113, control the first coolant circuit to absorb heat from the battery heat exchange circuit through the second coolant circuit.

[0096] S114. Determine if the battery coolant temperature is higher than the target heater coolant temperature. If yes, proceed to step S115; otherwise, proceed to step S111.

[0097] S115 controls the heating circuit to absorb heat from the battery heat exchange circuit.

[0098] S116, obtain the cooling water temperature and ambient temperature of the second coolant circuit.

[0099] S117. Determine if the cooling water temperature is greater than or equal to the ambient temperature. If yes, proceed to step S118; if no, proceed to step S119.

[0100] S118 controls the first coolant circuit to absorb heat from the electric drive heat exchange circuit through the second coolant circuit.

[0101] S119 controls the first coolant circuit to absorb heat from the electric drive heat exchange circuit and the ambient heat exchange circuit through the second coolant circuit.

[0102] In summary, the dehumidification control method for a vehicle heat pump system according to embodiments of the present invention, in response to a dehumidification command for the passenger compartment, controls the heat pump circuit to perform cooling and dehumidification of the passenger compartment and to provide heat to the heating circuit to supplement the passenger compartment's heating capacity, and determines the supplementary heating capacity; when the supplementary heating capacity is sufficient, controls the heating circuit to release heat to at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and ambient heat exchange circuit to dissipate heat from the passenger compartment; when the supplementary heating capacity is insufficient, controls the heating circuit or the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and ambient heat exchange circuit to supplement the passenger compartment's heating capacity. Therefore, this method can reduce the energy consumption of the heat pump system and rationally distribute heat among different circuits of the heat pump system.

[0103] Corresponding to the above embodiments, the present invention also proposes a vehicle heat pump system.

[0104] like Figure 11 As shown, the vehicle heat pump system 200 of this embodiment may include: a memory 210, a processor 220, and a program stored in the memory 210 and executable on the processor 220. When the processor 220 executes the program, it implements the dehumidification control method of the vehicle heat pump system described above.

[0105] According to an embodiment of the present invention, by executing the above-described dehumidification control method for a vehicle heat pump system, the energy consumption of the heat pump system can be reduced, and the heat can be rationally distributed among different circuits of the heat pump system.

[0106] Corresponding to the above embodiments, the present invention also proposes a dehumidification control device for a vehicle heat pump system, such as... Figure 2 As shown, the heat pump system includes a heat pump circuit (consisting of a first coolant circuit 10 and a second coolant circuit 20), a heater circuit 30, a battery heat exchange circuit 60, an electric drive heat exchange circuit 70, and an ambient heat exchange circuit 80, as follows: Figure 12 As shown, the dehumidification control device 100 of the vehicle heat pump system in this embodiment of the invention includes: a determination module 110 and a control module 120.

[0107] The determining module 110 is used to determine the heat replenishment capacity. The control module 120 is used to respond to the vehicle's passenger compartment dehumidification command, control the heat pump circuit to cool and dehumidify the passenger compartment and provide heat to the heating circuit to replenish the passenger compartment, and when the heat replenishment capacity is sufficient, control the heating circuit to release heat to at least one of the battery heat exchange circuit, electric drive heat exchange circuit and environmental heat exchange circuit to dissipate heat from the passenger compartment, and when the heat replenishment capacity is insufficient, control the heating circuit or heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, electric drive heat exchange circuit and environmental heat exchange circuit to replenish the passenger compartment.

[0108] According to one embodiment of the present invention, the determining module 110 determines the heat compensation capacity, specifically for: obtaining the heating water temperature of the heating circuit; determining that the heat compensation capacity is sufficient when the heating water temperature is greater than the target heating water temperature; and determining that the heat compensation capacity is insufficient when the heating water temperature is less than the target heating water temperature.

[0109] According to one embodiment of the present invention, the control module 120 controls the heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit, specifically for: obtaining the battery temperature of the vehicle; when the battery temperature is less than a first preset battery temperature threshold, controlling the heating circuit to release heat to the battery heat exchange circuit; and when the battery temperature is greater than or equal to the first preset battery temperature threshold, controlling the heating circuit to release heat to the electric drive heat exchange circuit and the ambient heat exchange circuit.

[0110] According to one embodiment of the present invention, the control module 120 controls the heating circuit or the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit. Specifically, it is used to: obtain the battery water temperature of the battery heat exchange circuit and the electric drive water temperature of the electric drive heat exchange circuit; when the battery water temperature is greater than the target heating water temperature, control the heating circuit to absorb heat from the battery heat exchange circuit; when the electric drive water temperature is greater than the target heating water temperature, control the heating circuit to absorb heat from the electric drive heat exchange circuit; when the battery water temperature is less than or equal to the target heating water temperature and the electric drive water temperature is less than or equal to the target heating water temperature, control the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit.

[0111] According to one embodiment of the present invention, the heat pump circuit includes a first coolant circuit for cooling and dehumidifying the passenger compartment and a second coolant circuit for exchanging heat with a battery heat exchange circuit, an electric drive heat exchange circuit, and an environmental heat exchange circuit. The first coolant circuit and the second coolant circuit are connected. The control module 120 controls the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit. Specifically, this is used to: obtain the vehicle's battery temperature; and when the battery coolant temperature is greater than or equal to the electric drive coolant temperature and the battery temperature is greater than or equal to a second preset battery temperature threshold... The system controls the first coolant circuit to absorb heat from the battery heat exchange circuit through the second coolant circuit. When the battery water temperature is greater than or equal to the electric drive water temperature and the battery temperature is less than a second preset battery temperature threshold, or when the battery water temperature is less than the electric drive water temperature, the system obtains the cooling water temperature and ambient temperature of the second coolant circuit. When the cooling water temperature is greater than or equal to the ambient temperature, the system controls the first coolant circuit to absorb heat from the electric drive heat exchange circuit through the second coolant circuit. When the cooling water temperature is less than the ambient temperature, the system controls the first coolant circuit to absorb heat from both the electric drive heat exchange circuit and the ambient heat exchange circuit through the second coolant circuit.

[0112] According to one embodiment of the present invention, a first coolant circuit includes: a compressor, a water-cooled condenser, an evaporator, and a first throttling element. The discharge port of the compressor is connected to a first end of the water-cooled condenser, a second end of the water-cooled condenser is connected to a first end of the first throttling element, the other end of the first throttling element is connected to a first end of the evaporator, and the other end of the evaporator is connected to the return port of the compressor. The control module 120 controls the compressor and the first throttling element to control the first coolant circuit to cool and dehumidify the passenger compartment. A second coolant circuit includes: a heat exchanger and a second throttling element. One end of the second throttling element is connected to a second end of the water-cooled condenser and a first end of the first throttling element, respectively. The other end of the second throttling element is connected to a first end of the heat exchanger. The second end of the heat exchanger is connected to the other end of the evaporator and the return port of the compressor, respectively. A third end of the heat exchanger is connected to a first end of a nine-way valve of the heat pump system, and a fourth end of the heat exchanger is connected to a second end of the nine-way valve. The control module 120 controls the compressor and the first throttling element to control the first coolant circuit to cool and dehumidify the passenger compartment. A three-way valve is provided to control the first coolant circuit to absorb heat from at least one of the battery heat exchange circuit, electric drive heat exchange circuit, and ambient heat exchange circuit through the second coolant circuit. The heater circuit includes a heater core and a heater pump. The heater core is positioned corresponding to the evaporator. One end of the heater core is connected to the third end of the water-cooled condenser, and the other end of the heater core is connected to one end of the heater pump. The other end of the heater pump is connected to the fourth end of the water-cooled condenser. The third end of the water-cooled condenser is connected to the first end of the three-way valve of the heat pump system. The second end of the three-way valve is connected to one end of the heater core, the third end of the three-way valve is connected to the third end of the nine-way valve, and the fourth end of the nine-way valve is connected to one end of the heater water pump and the other end of the heater core. The nine-way valve and the three-way valve are controlled to supply heat from the first coolant circuit to the heater circuit to supplement the heat of the passenger compartment, and to control the heater circuit to absorb heat from the battery heat exchange circuit or the electric drive heat exchange circuit, or to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit and the ambient heat exchange circuit.

[0113] According to one embodiment of the present invention, the battery heat exchange circuit includes: a battery water pump and a battery heat exchange assembly, one end of the battery water pump is connected to the fifth end of a nine-way valve, the other end of the battery water pump is connected to one end of the battery heat exchange assembly, and the other end of the battery heat exchange assembly is connected to the sixth end of the nine-way valve; the electric drive heat exchange circuit includes: an electric drive water pump and an electric drive heat exchange assembly, one end of the electric drive water pump is connected to the seventh end of the nine-way valve, the other end of the electric drive water pump is connected to one end of the electric drive heat exchange assembly, and the other end of the electric drive heat exchange assembly is connected to the eighth end of the nine-way valve; the environmental heat exchange circuit includes: a radiator, one end of the radiator is connected to the ninth end of the nine-way valve, and the other end of the radiator is connected to the seventh end of the nine-way valve and one end of the electric drive water pump, respectively.

[0114] It should be noted that for details not disclosed in the dehumidification control device of the vehicle heat pump system in this embodiment of the invention, please refer to the details disclosed in the dehumidification control method of the vehicle heat pump system in this embodiment of the invention, which will not be repeated here.

[0115] According to an embodiment of the present invention, a dehumidification control device for a vehicle heat pump system includes a determining module for determining the heat replenishment capacity, and a control module for responding to a vehicle's passenger compartment dehumidification command. The control module controls the heat pump circuit to perform cooling and dehumidification of the passenger compartment and to provide heat to the heating circuit to replenish the passenger compartment. When the heat replenishment capacity is sufficient, the control module controls the heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit to dissipate heat from the passenger compartment. When the heat replenishment capacity is insufficient, the control module controls the heating circuit or the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit to replenish the passenger compartment. Therefore, this device can reduce the energy consumption of the heat pump system and rationally distribute heat among different circuits of the heat pump system.

[0116] Corresponding to the above embodiments, the present invention also proposes a vehicle.

[0117] like Figure 13 As shown, the vehicle 300 in this embodiment of the invention may include a vehicle heat pump system 200, or, as... Figure 14 As shown, the vehicle 300 in this embodiment of the invention may further include a dehumidification control device 100 for the vehicle heat pump system.

[0118] According to embodiments of the present invention, a vehicle including the vehicle heat pump system described above or the dehumidification control device of the vehicle heat pump system described above can reduce the energy consumption of the heat pump system and rationally distribute the heat between different circuits of the heat pump system.

[0119] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0120] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0121] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0122] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0123] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0124] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dehumidification control method for a vehicle heat pump system, characterized in that, The heat pump system includes a heat pump circuit, a warm air circuit, a battery heat exchange circuit, an electric drive heat exchange circuit, and an ambient heat exchange circuit. The method includes: In response to the vehicle's passenger compartment dehumidification command, the heat pump circuit is controlled to cool and dehumidify the passenger compartment and provide heat to the heating circuit to replenish the passenger compartment, and the replenishment capacity is determined. The heat pump circuit includes a first coolant circuit for cooling and dehumidifying the crew cabin and a second coolant circuit for exchanging heat with the battery heat exchange circuit, the electric drive heat exchange circuit and the environmental heat exchange circuit, and the first coolant circuit and the second coolant circuit are connected. When the heating capacity is sufficient, the heating circuit is controlled to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit and the ambient heat exchange circuit to dissipate heat to the occupant compartment. When the heat replenishment capacity is insufficient, the heating circuit or the heat pump circuit is controlled to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit to replenish the heat to the occupant compartment. This includes: obtaining the battery water temperature of the battery heat exchange circuit and the electric drive water temperature of the electric drive heat exchange circuit; when the battery water temperature is greater than the target heating water temperature, controlling the heating circuit to absorb heat from the battery heat exchange circuit; when the electric drive water temperature is greater than the target heating water temperature, controlling the heating circuit to absorb heat from the electric drive heat exchange circuit; and when the battery water temperature is less than or equal to the target heating water temperature and the electric drive water temperature is less than or equal to the target heating water temperature, controlling the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit. Specifically, when the battery water temperature is greater than the target heater water temperature and the electric drive water temperature is greater than the target heater water temperature, the difference between the battery water temperature and the target heater water temperature and the difference between the electric drive water temperature and the target heater water temperature are compared. When the difference between the battery water temperature and the target heater water temperature is greater than the difference between the electric drive water temperature and the target heater water temperature, the heater circuit is controlled to absorb heat from the battery heat exchange circuit. When the difference between the electric drive water temperature and the target heater water temperature is greater than the difference between the battery water temperature and the target heater water temperature, the heater circuit is controlled to absorb heat from the electric drive heat exchange circuit.

2. The method according to claim 1, characterized in that, The determination of the heat replenishment capacity includes: Obtain the heating water temperature of the heating circuit; When the heating water temperature is greater than the target heating water temperature, it is determined that the heat replenishment capacity is sufficient; When the heating water temperature is lower than the target heating water temperature, it is determined that the heat replenishment capacity is insufficient.

3. The method according to claim 1, characterized in that, The control of the heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit includes: Obtain the battery temperature of the vehicle; When the battery temperature is lower than a first preset battery temperature threshold, the heating circuit is controlled to release heat to the battery heat exchange circuit. When the battery temperature is greater than or equal to the first preset battery temperature threshold, the heating circuit is controlled to release heat to the electric drive heat exchange circuit and the ambient heat exchange circuit.

4. The method according to claim 1, characterized in that, The control of the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit includes: Obtain the battery temperature of the vehicle; When the battery water temperature is greater than or equal to the electric drive water temperature and the battery temperature is greater than or equal to the second preset battery temperature threshold, the first coolant circuit is controlled to absorb heat from the battery heat exchange circuit through the second coolant circuit; When the battery water temperature is greater than or equal to the electric drive water temperature and the battery temperature is less than the second preset battery temperature threshold, or when the battery water temperature is less than the electric drive water temperature, the cooling water temperature and ambient temperature of the second coolant circuit are obtained. Specifically, when the cooling water temperature is greater than or equal to the ambient temperature, the first coolant circuit is controlled to absorb heat from the electric drive heat exchange circuit through the second coolant circuit; when the cooling water temperature is less than the ambient temperature, the first coolant circuit is controlled to absorb heat from both the electric drive heat exchange circuit and the ambient heat exchange circuit through the second coolant circuit.

5. The method according to claim 4, characterized in that, The first coolant circuit includes a compressor, a water-cooled condenser, an evaporator, and a first throttling element. The exhaust port of the compressor is connected to a first end of the water-cooled condenser, a second end of the water-cooled condenser is connected to one end of the first throttling element, the other end of the first throttling element is connected to one end of the evaporator, and the other end of the evaporator is connected to the return port of the compressor. The first coolant circuit is used to cool and dehumidify the passenger compartment by controlling the compressor and the first throttling element. The second coolant circuit includes a heat exchanger and a second throttling element. One end of the second throttling element is connected to the second end of the water-cooled condenser and one end of the first throttling element, respectively. The other end of the second throttling element is connected to the first end of the heat exchanger. The second end of the heat exchanger is connected to the other end of the evaporator and the return port of the compressor, respectively. The third end of the heat exchanger is connected to the first end of the nine-way valve of the heat pump system, and the fourth end of the heat exchanger is connected to the second end of the nine-way valve. By controlling the second throttling element and the nine-way valve, the first coolant circuit can be controlled to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the ambient heat exchange circuit through the second coolant circuit. The heating circuit includes a heating core and a heating water pump. The heating core is positioned corresponding to the evaporator. One end of the heating core is connected to the third end of the water-cooled condenser, and the other end of the heating core is connected to one end of the heating water pump. The other end of the heating water pump is connected to the fourth end of the water-cooled condenser. The third end of the water-cooled condenser is connected to the first end of the three-way valve of the heat pump system. The second end of the three-way valve is connected to one end of the heating core. The third end of the three-way valve is connected to the third end of the nine-way valve. The fourth end of the nine-way valve is connected to one end of the heating water pump and the other end of the heating core. By controlling the nine-way valve and the three-way valve, the first coolant circuit can be controlled to provide heat to the heating circuit to supplement the heat of the passenger compartment. The heating circuit can also be controlled to absorb heat from the battery heat exchange circuit or the electric drive heat exchange circuit, or to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit, and the environmental heat exchange circuit.

6. The method according to claim 5, characterized in that, The battery heat exchange circuit includes: a battery water pump and a battery heat exchange assembly. One end of the battery water pump is connected to the fifth end of the nine-way valve, the other end of the battery water pump is connected to one end of the battery heat exchange assembly, and the other end of the battery heat exchange assembly is connected to the sixth end of the nine-way valve. The electric drive heat exchange circuit includes: an electric drive water pump and an electric drive heat exchange assembly. One end of the electric drive water pump is connected to the seventh end of the nine-way valve, the other end of the electric drive water pump is connected to one end of the electric drive heat exchange assembly, and the other end of the electric drive heat exchange assembly is connected to the eighth end of the nine-way valve. The environmental heat exchange circuit includes a radiator, one end of which is connected to the ninth end of the nine-way valve, and the other end of which is connected to the seventh end of the nine-way valve and one end of the electric water pump.

7. A vehicle heat pump system, characterized in that, include: A memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the dehumidification control method for a vehicle heat pump system according to any one of claims 1-6.

8. A dehumidification control device for a vehicle heat pump system, characterized in that, The dehumidification control method for a vehicle heat pump system as described in any one of claims 1-6, wherein the heat pump system includes a heat pump circuit, a heating circuit, a battery heat exchange circuit, an electric drive heat exchange circuit, and an ambient heat exchange circuit, and the device includes: The determination module is used to determine the heat replenishment capacity; The control module is configured to respond to a dehumidification command for the passenger compartment of the vehicle, control the heat pump circuit to cool and dehumidify the passenger compartment and provide heat to the heating circuit to supplement the heating of the passenger compartment, and when the supplementary heating capacity is sufficient, control the heating circuit to release heat to at least one of the battery heat exchange circuit, the electric drive heat exchange circuit and the environmental heat exchange circuit to dissipate heat from the passenger compartment, and when the supplementary heating capacity is insufficient, control the heating circuit or the heat pump circuit to absorb heat from at least one of the battery heat exchange circuit, the electric drive heat exchange circuit and the environmental heat exchange circuit to supplement the heating of the passenger compartment.

9. A vehicle, characterized in that, Includes the vehicle heat pump system according to claim 7, or the dehumidification control device for the vehicle heat pump system according to claim 8.

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