A hybrid vehicle passenger cabin direct cooling and direct heating thermal management system and method

Abstract

The application provides a hybrid vehicle passenger cabin direct cooling and direct heating thermal management system and method, and the system comprises: a refrigerant circuit, a motor water circuit, a battery water circuit and a warm air water circuit; the refrigerant circuit comprises a compressor, an in-vehicle condenser, an out-vehicle heat exchanger, an in-vehicle evaporator and a first heat exchanger which are communicated through pipelines and valves; the motor water circuit is communicated with the battery water circuit through a multi-way water valve; the refrigerant circuit exchanges heat with the battery water circuit through the first heat exchanger; and the battery water circuit exchanges heat with the warm air water circuit through a second heat exchanger. The system improves the utilization rate of the waste heat of the vehicle internal components and can fully meet the heating demand of the passenger cabin.

Description

Technical Field

[0001] This invention relates to the field of vehicle thermal management technology, and in particular to a direct cooling and heating thermal management system and method for the passenger compartment of a hybrid vehicle. Background Technology

[0002] With the development of vehicle powertrain technology, the market share of hybrid vehicles is increasing. However, because they have two powertrain systems, the motor, battery, and engine all need to be maintained at suitable operating temperatures. To ensure the comfort of passengers, the passenger compartment also requires cooling or heating. Existing hybrid vehicle thermal management systems struggle to simultaneously address the thermal management needs of the motor, battery, engine, and passenger compartment, failing to effectively and rationally distribute and transfer heat between the components. This increases the burden on the thermal management system and significantly reduces the vehicle's range. Summary of the Invention

[0003] The purpose of this invention is to provide a direct cooling and heating thermal management system and method for the passenger compartment of a hybrid vehicle, so as to realize the heat distribution of various components in the vehicle, reduce the thermal management burden, and improve the vehicle's range.

[0004] To solve the above-mentioned technical problems, the present invention provides a direct cooling and heating thermal management system for the passenger compartment of a hybrid vehicle, including: a refrigerant circuit, a motor water circuit, a battery water circuit, and a heater water circuit;

[0005] The refrigerant circuit includes a compressor, an in-vehicle condenser, an external heat exchanger, an in-vehicle evaporator, and a first heat exchanger, all connected by pipes and valves.

[0006] The motor water circuit is connected to the battery water circuit via a multi-way water valve;

[0007] The refrigerant circuit exchanges heat with the battery water circuit through the first heat exchanger;

[0008] The battery water circuit exchanges heat with the warm air water circuit through the second heat exchanger.

[0009] According to the above scheme, the refrigerant circuit includes:

[0010] The first refrigerant circuit consists of a compressor, an in-vehicle condenser, a combination valve, an external heat exchanger, and a second shut-off valve connected in sequence.

[0011] The refrigerant second circuit consists of a compressor, an in-vehicle condenser, a combination valve, an external heat exchanger, a second electronic expansion valve, and an in-vehicle evaporator connected in sequence.

[0012] The refrigerant third circuit consists of a compressor, an in-vehicle condenser, a combination valve, an external heat exchanger, a third electronic expansion valve, and a first heat exchanger connected in sequence.

[0013] The combined valve includes a first shut-off valve and a first electronic expansion valve connected in parallel.

[0014] According to the above scheme, the battery water circuit includes:

[0015] The battery first water circuit consists of a battery, a four-way water valve, a first heat exchanger, a second three-way water valve, and a battery water pump connected in sequence.

[0016] The second water circuit of the battery consists of a battery, a four-way water valve, a first heat exchanger, a second three-way water valve, and a second heat exchanger connected in sequence.

[0017] According to the above scheme, the motor water circuit includes:

[0018] The first water circuit of the motor consists of a motor-pump, a motor, a four-way water valve, and a first three-way water valve connected in sequence.

[0019] The second water circuit for the motor consists of a motor-driven water pump, a motor, a motor circuit radiator, and a first three-way water valve connected in sequence.

[0020] According to the above scheme, the heating water circuit includes the engine, the second heat exchanger, and the heating core connected in sequence.

[0021] According to the above scheme, a low-pressure air PTC is installed in the heating core.

[0022] The above scheme includes a fan used to enhance the heat exchange effect of the motor circuit radiator, the external heat exchanger, and the air.

[0023] This invention also provides a method for direct cooling and heating thermal management of a hybrid vehicle passenger compartment using the aforementioned direct cooling and heating thermal management system, comprising:

[0024] In response to the heating demand of the passenger compartment, the compressor is turned on, so that the refrigerant flows from the compressor through the in-vehicle condenser and the external heat exchanger in sequence before returning to the compressor; or the compressor is turned on, so that the refrigerant flows from the compressor through the in-vehicle condenser, the external heat exchanger, and the in-vehicle evaporator in sequence before returning to the compressor.

[0025] In response to the cooling needs of the passenger compartment, the compressor is turned on, so that the refrigerant flows from the compressor through the condenser, the external heat exchanger, and the internal evaporator before returning to the compressor.

[0026] According to the above scheme, in response to the heating demand of the passenger compartment, the compressor is controlled to start, so that the refrigerant flows from the compressor through the in-vehicle condenser, the external heat exchanger, and the first heat exchanger in sequence before returning to the compressor. At the same time, the multi-way water valve is controlled to connect the motor water circuit and the battery water circuit in series.

[0027] The present invention also provides an automobile equipped with the hybrid vehicle passenger compartment direct cooling and direct heating thermal management system described above.

[0028] The beneficial effects of this invention are as follows: This invention couples the refrigerant circuit to the motor water circuit and the battery water circuit through a heat exchanger, so that the refrigerant circuit can both cool and heat the passenger compartment through the operation of the compressor, and also recover the waste heat of the motor and battery through the heat exchanger, thereby achieving efficient utilization of the heat of the power system and improving the vehicle's range while meeting the heating needs of the passenger compartment.

[0029] Furthermore, by coupling the engine-integrated heater water circuit and the battery water circuit using a heat exchanger, the battery water circuit can effectively utilize the engine's waste heat to heat the battery, reducing the battery's self-heating power and increasing the battery's range. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the direct cooling and heating thermal management system for the passenger compartment of a hybrid vehicle according to Embodiment 1 of the present invention.

[0031] Figure 2 This is a flowchart of the direct cooling and heating thermal management method for the passenger compartment of a hybrid vehicle according to Embodiment 3 of the present invention.

[0032] In the diagram: 1-Battery, 2-Engine, 3-Compressor, 4-In-vehicle condenser, 5-Low-pressure air PTC, 6-First electronic expansion valve, 7-First shut-off valve, 8-External heat exchanger, 9-Motor circuit radiator, 10-Fan, 11-Second shut-off valve, 12-Second electronic expansion valve, 13-In-vehicle evaporator, 14-Third electronic expansion valve, 15-Motor water pump, 16-First three-way water valve, 17-Four-way water valve, 18-First heat exchanger, 19-Battery water pump, 20-Second three-way water valve, 21-Motor, 22-Second heat exchanger, 23-Heater core. Detailed Implementation

[0033] Example 1:

[0034] See Figure 1 A direct cooling and heating thermal management system for the passenger compartment of a hybrid vehicle includes: a refrigerant circuit, a water circuit for a motor 21, a water circuit for a battery 1, and a water circuit for heating air.

[0035] The refrigerant circuit includes a compressor 3, an in-vehicle condenser 4, an external heat exchanger 8, an in-vehicle evaporator 13, and a first heat exchanger 18, which are connected by pipes and valves.

[0036] The water circuit of motor 21 is connected to the water circuit of battery 1 through a multi-way water valve;

[0037] The refrigerant circuit exchanges heat with the water circuit of battery 1 through the first heat exchanger 18;

[0038] The water circuit of battery 1 exchanges heat with the warm air water circuit through the second heat exchanger 22.

[0039] Furthermore, the refrigerant circuit includes:

[0040] The first refrigerant circuit consists of a compressor 3, an in-vehicle condenser 4, a combination valve, an external heat exchanger 8, and a second shut-off valve 11 connected in sequence.

[0041] The second refrigerant circuit consists of a compressor 3, an in-vehicle condenser 4, a combination valve, an external heat exchanger 8, a second electronic expansion valve 12, and an in-vehicle evaporator 13 connected in sequence.

[0042] The refrigerant third circuit consists of the compressor 3, the in-vehicle condenser 4, the combination valve, the external heat exchanger 8, the third electronic expansion valve 14, and the first heat exchanger 18 connected in sequence.

[0043] The combined valve includes a first shut-off valve 7 and a first electronic expansion valve 6 connected in parallel.

[0044] The control of each component in the refrigerant circuit includes: starting and stopping the compressor 3 and adjusting its speed, opening and closing the first shut-off valve 7 / second shut-off valve 11, and adjusting the position of the first electronic expansion valve 6 / second electronic expansion valve 12 / third electronic expansion valve 14.

[0045] Furthermore, the water circuit of battery 1 includes:

[0046] The first water circuit of battery 1 is composed of battery 1, four-way water valve 17, first heat exchanger 18, second three-way water valve 20 and battery water pump 19 connected in sequence; the first water circuit of battery 1 is used for battery 1 self-circulation;

[0047] The second water circuit of battery 1 is composed of battery 1, four-way water valve 17, first heat exchanger 18, second three-way water valve 20, and second heat exchanger 22 connected in sequence; the second water circuit of battery 1 is used for heating circulation of battery 1.

[0048] The control of each component in the battery 1 water circuit includes: duty cycle adjustment of battery water pump 19 and position adjustment of second three-way water valve 20.

[0049] Furthermore, the water circuit of motor 21 includes:

[0050] The first water circuit of motor 21 is composed of motor-pump 15, motor 21, four-way water valve 17 and first three-way water valve 16 connected in sequence; the first water circuit of motor 21 is used for the waste heat utilization circulation of motor 21.

[0051] The second water circuit of motor 21 is composed of motor water pump 15, motor 21, motor 21 circuit radiator 9 and first three-way water valve 16 connected in sequence; the second water circuit of motor 21 is used for heat dissipation circulation of motor 21.

[0052] The control of each component in the water circuit of motor 21 includes: duty cycle adjustment of motor water pump 15, position adjustment of four-way water valve 17, and position adjustment of first three-way water valve 16.

[0053] Furthermore, the heating water circuit includes an engine 2, a second heat exchanger 22, and a heating core 23 connected in sequence.

[0054] Furthermore, the system includes a fan 10 for enhancing the heat exchange effect between the motor 21 circuit radiator 9, the vehicle exterior heat exchanger 8, and the air; the fan 10 is a component of the motor 21 water circuit, and the control of the motor 21 water circuit also includes the speed regulation of the fan 10.

[0055] In a preferred embodiment of the present invention, the system further includes the following sensing elements:

[0056] A pressure sensor installed at the inlet of compressor 3 is used to continuously monitor the low refrigerant pressure at the inlet of compressor 3.

[0057] The first temperature and pressure sensor installed at the refrigerant side outlet of the condenser 4 inside the vehicle is used to continuously monitor the refrigerant pressure (high pressure) and temperature at the refrigerant side outlet of the condenser 4 inside the vehicle.

[0058] The second temperature and pressure sensor is installed at the inlet of the second electronic expansion valve 12 and the third electronic expansion valve 14 to continuously monitor the refrigerant pressure and temperature before the second electronic expansion valve 12 and the third electronic expansion valve 14.

[0059] The first temperature sensor installed at the outlet of compressor 3 is used to continuously monitor the refrigerant temperature at the outlet of compressor 3.

[0060] A second temperature sensor is installed at the air outlet of the heater core 23 to continuously monitor the air outlet temperature of the heater core 23.

[0061] The third temperature sensor, located at the water outlet of motor 21, is used to continuously monitor the outlet water temperature of motor 21.

[0062] Example 2:

[0063] Existing hybrid vehicles typically use high-voltage PTC5 (Positive Temperature Coefficient, referring to semiconductor materials or components with a large positive temperature coefficient) heating for battery 1 and passenger compartment heating, with engine 2 providing auxiliary heating. This heating method has high energy consumption, low COP (coefficient of performance), and high hardware costs.

[0064] The principle of this embodiment is basically the same as that of Embodiment 1. Based on Embodiment 1, in order to solve the above-mentioned technical problems, this embodiment provides a direct cooling and heating thermal management system for the passenger compartment of a hybrid vehicle. In this system, the heating core 23 is equipped with a low-pressure air PTC5. The low-pressure air PTC5 is activated when there is a heating demand in the passenger compartment to heat the air outlet of the heating core 23.

[0065] When efficient heating is required in extremely cold regions, compressor 3 can be turned on, and the cooling and heating functions can be activated simultaneously. Combined with the waste heat of engine 2 and the heating of low-pressure air PTC5, the heating needs of the passenger cabin in extremely cold regions can be met.

[0066] Example 3:

[0067] Based on the hybrid vehicle passenger compartment direct cooling and heating thermal management system described in Embodiment 1, this embodiment provides a hybrid vehicle passenger compartment direct cooling and heating thermal management method to meet different passenger compartment thermal management needs. (See also...) Figure 2 The method includes:

[0068] S1. In response to the heating demand of the passenger compartment, control the compressor 3 to start, so that the refrigerant flows from the compressor 3 through the in-vehicle condenser 4 and the external heat exchanger 8 in sequence and then returns to the compressor 3; or control the compressor 3 to start, so that the refrigerant flows from the compressor 3 through the in-vehicle condenser 4, the external heat exchanger 8, the in-vehicle evaporator 13 in sequence and then returns to the compressor 3.

[0069] S2. In response to the cooling demand of the passenger compartment, control the compressor 3 to start, so that the refrigerant flows from the compressor 3 through the condenser, the external heat exchanger 8, the internal evaporator 13 and then back to the compressor 3.

[0070] Among them, the control process of step S1 is the conventional heating of the crew cabin and the heating of the crew cabin in a low temperature environment;

[0071] When the passenger compartment is under normal heating, the first electronic expansion valve 6 is open, the first shut-off valve 7 is closed, the second shut-off valve 11 is open, and the second electronic expansion valve 12 and the third electronic expansion valve 14 are closed. At this time, the refrigerant passes through the vehicle condenser 4 in sequence, is throttled by the first electronic expansion valve 6, evaporates through the vehicle heat exchanger 8, and then flows back to the compressor 3 through the second shut-off valve 11.

[0072] When heating is activated in a low-temperature environment in the passenger compartment, the first electronic expansion valve 6 is closed, the first shut-off valve 7 is open, the external heat exchanger 8 does not exchange heat, the second electronic expansion valve 12 is open, the third electronic expansion valve 14 is closed, and the second shut-off valve 11 is closed. At this time, the refrigerant passes through the in-vehicle condenser 4, the first shut-off valve 7, the external heat exchanger 8, the electronic expansion valve, and the in-vehicle evaporator 13. At this time, the cooling and heating functions of the refrigerant circuit are activated simultaneously. Because the external environment is too cold, it is impossible to absorb heat from the external environment. Therefore, the compressor 3 does work to convert mechanical energy into heat energy. Although cooling and heating are activated simultaneously, the heating capacity is greater than the cooling capacity (because of the law of conservation of energy, the total heat added to the refrigerant circuit is approximately equal to the work done by the compressor 3).

[0073] The control process in step S2 is the normal cooling of the passenger compartment. At this time, the first shut-off valve 7 is open, the first electronic expansion valve 6 is closed, the second electronic expansion valve 12 is open, the third electronic expansion valve 14 is closed, and the second shut-off valve 11 is closed. At this time, the refrigerant passes through the in-vehicle condenser 4, the first shut-off valve 7, the external heat exchanger 8, the second electronic expansion valve 12, and the in-vehicle evaporator 13 in sequence, and returns to the compressor 3.

[0074] Furthermore, in response to the heating demand of the passenger compartment, the compressor 3 is turned on, so that the refrigerant flows from the compressor 3 through the in-vehicle condenser 4, the external heat exchanger 8, and the first heat exchanger 18 in sequence before returning to the compressor 3. At the same time, the multi-way water valve is controlled to connect the water circuit of the motor 21 in series with the water circuit of the battery 1.

[0075] In a preferred embodiment of the present invention, the method further includes the following control modes:

[0076] 1) Battery-only heating mode

[0077] When engine 2 is running, the three-way water valve is controlled to connect the first water circuit and the second water circuit of battery 1; at this time, the waste heat from engine 2 is transferred to the water circuit of battery 1 through the second heat exchanger 22 and heats battery 1.

[0078] When engine 2 is not running, the self-heating function of battery 1 is activated. At this time, the power of battery 1 is consumed and converted into heat energy, and the COP is 1.

[0079] Understandably, in low-temperature environments (such as -22℃), engine 2 can be used to heat battery 1, and the self-heating function of battery 1 can be activated at the same time, at which point the COP is 1.

[0080] 2) Dehumidification mode

[0081] Dehumidification modes include heating dehumidification, cooling dehumidification, and simultaneous cooling and heating dehumidification.

[0082] In heating and dehumidification mode, the first electronic expansion valve 6 is open, the first shut-off valve 7 is closed, the second shut-off valve 11 is open, and the second electronic expansion valve 12 and the third electronic expansion valve 14 are closed. At this time, the refrigerant passes through the vehicle condenser 4 in sequence, is throttled by the first electronic expansion valve 6, evaporates through the vehicle heat exchanger 8, and then flows back to the compressor 3 through the second shut-off valve 11.

[0083] In cooling and dehumidification mode (suitable for high ambient temperatures), the first shut-off valve 7 is open, the first electronic expansion valve 6 is closed, the second electronic expansion valve 12 is open, the third electronic expansion valve 14 is closed, and the second shut-off valve 11 is closed. At this time, the refrigerant passes through the in-vehicle condenser 4, the first shut-off valve 7, the external heat exchanger 8, the second electronic expansion valve 12, and the in-vehicle evaporator 13 in sequence, and returns to the compressor 3.

[0084] When cooling, heating, and dehumidification are simultaneously activated, the first shut-off valve 7 is open, the first electronic expansion valve 6 is closed, the second electronic expansion valve 12 is open, the third electronic expansion valve 14 is closed, and the second shut-off valve 11 is closed. At this time, the refrigerant passes sequentially through the in-vehicle condenser 4, the first shut-off valve 7, the external heat exchanger 8, the second electronic expansion valve 12, and the in-vehicle evaporator 13, returning to the compressor 3. Simultaneously, the low-pressure air PTC 5 is activated to heat the outlet air.

[0085] 3) Defrosting mode

[0086] In defrost mode, the first electronic expansion valve 6 is open, the first shut-off valve 7 is closed, the second shut-off valve 11 is open, and the second electronic expansion valve 12 and the third electronic expansion valve 14 are closed. At this time, the refrigerant passes through the vehicle condenser 4 in sequence, is throttled by the first electronic expansion valve 6, evaporates through the vehicle heat exchanger 8, and then flows back to the compressor 3 through the second shut-off valve 11.

[0087] 4) Passenger cabin battery hybrid heating mode

[0088] In the hybrid heating mode of the passenger compartment battery, the first electronic expansion valve 6 is open, the first shut-off valve 7 is closed, the second shut-off valve 11 is open, and the second electronic expansion valve 12 and the third electronic expansion valve 14 are closed. At this time, the refrigerant passes through the vehicle condenser 4 in sequence, is throttled by the first electronic expansion valve 6, evaporates through the vehicle heat exchanger 8, and then flows back to the compressor 3 through the second shut-off valve 11.

[0089] When engine 2 is running, the three-way water valve is controlled to connect the first water circuit and the second water circuit of battery 1; at this time, the waste heat from engine 2 is transferred to the water circuit of battery 1 through the second heat exchanger 22 and heats battery 1.

[0090] When engine 2 is not running, the self-heating function of battery 1 is activated, at which time the power consumed by battery 1 is converted into heat energy.

[0091] Understandably, in low-temperature environments, engine 2 can be used to heat battery 1, while simultaneously activating the self-heating function of battery 1.

[0092] In a preferred embodiment of the present invention, the heating capacity of the crew compartment and battery 1 can be distributed by controlling the three-way water valve.

[0093] 5) Waste heat from motor for heating mode

[0094] In the motor waste heat supply mode, compressor 3 is turned on, first shut-off valve 7 is turned on, first electronic expansion valve 6 is turned off, third electronic expansion valve 14 is turned on, second electronic expansion valve 12 is turned off, and second shut-off valve 11 is turned off. At this time, the refrigerant flows back to compressor 3 through vehicle interior condenser 4, first shut-off valve 7, vehicle exterior heat exchanger 8, third electronic expansion valve 14, and first heat exchanger 18 in sequence.

[0095] Control the first three-way water valve to disconnect the second water circuit of motor 21 (i.e. stop the heating cycle of motor 21), control the four-way water valve 17 to connect the water circuit of motor 21 and the water circuit of battery 1, and start the battery water pump 19 and the motor water pump 15 at the same time.

[0096] In this mode, compared to the existing technology that uses the water circuit of motor 21 to heat the passenger compartment, this invention absorbs the heat from the water circuit of motor 21 through the first heat exchanger 18, and then uses refrigerant to heat the passenger compartment. By recovering the waste heat of the motor, or by making full use of the heat energy generated by the motor's reduced efficiency for heating, the heating energy consumption during pure electric driving can be reduced, and sufficient heat source can be provided to heat the battery under extremely low temperature conditions, thereby improving the charging speed. Furthermore, in low-temperature environments, the waste heat of motor 21 can also be used to heat battery 1 (this can be achieved by controlling the opening and closing of the third electronic expansion valve 14, so that the waste heat of motor 21 can be preferentially supplied to battery 1 for heating), thus making full use of the waste heat of motor 21.

[0097] 6) Battery-cooled crew compartment heating mode

[0098] In the battery-cooled passenger compartment heating mode, compressor 3 is turned on, first shut-off valve 7 is turned on, first electronic expansion valve 6 is turned off, third electronic expansion valve 14 is turned on, second electronic expansion valve 12 is turned off, and second shut-off valve 11 is turned off; refrigerant flows back to compressor 3 sequentially through vehicle interior condenser 4, first shut-off valve 7, vehicle exterior heat exchanger 8, third electronic expansion valve 14, and first heat exchanger 18.

[0099] 7) Battery Cooling Mode

[0100] In battery cooling mode, compressor 3 is turned on, first shut-off valve 7 is turned on, first electronic expansion valve 6 is turned off, third electronic expansion valve 14 is turned on, second electronic expansion valve 12 is turned off, and second shut-off valve 11 is turned off. The refrigerant passes through the in-vehicle condenser 4, first shut-off valve 7, external heat exchanger 8, third electronic expansion valve 14, and first heat exchanger 18 in sequence, and returns to compressor 3.

[0101] 8) Hybrid refrigeration

[0102] In the mixed cooling mode, compressor 3 is turned on, first shut-off valve 7 is turned on, first electronic expansion valve 6 is turned off, second electronic expansion valve 12 is turned on, third electronic expansion valve 14 is turned on, and second shut-off valve 11 is turned off; refrigerant passes through the in-vehicle condenser 4, first shut-off valve 7, external heat exchanger 8, second electronic expansion valve 12, in-vehicle evaporator 13, and first heat exchanger 18 in sequence and returns to compressor 3.

[0103] Example 4:

[0104] This embodiment provides a car equipped with the hybrid vehicle passenger compartment direct cooling and heating thermal management system described in Embodiment 3.

[0105] Example 5:

[0106] This embodiment provides a computer device, such as a smartphone, tablet computer, laptop computer, desktop computer, rack server, blade server, tower server, or cabinet server (including standalone servers or server clusters composed of multiple servers) capable of executing programs. The computer device in this embodiment includes, but is not limited to, a memory and a processor that can be interconnected via a system bus.

[0107] In this embodiment, the memory (i.e., the readable storage medium) includes flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), and programmable read-only memory (PROM). The memory can also be an external storage device of the computer device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the computer device. Of course, the memory can also include both internal storage units and external storage devices of the computer device. In this embodiment, the memory is typically used to store the operating system and various application software installed on the computer device, such as the program code of the hybrid vehicle passenger compartment direct cooling and heating thermal management system in Embodiment 3. Furthermore, the memory can also be used to temporarily store various types of data that have been output or will be output.

[0108] In some embodiments, the processor may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip. The processor is typically used to control the overall operation of a computer device. In this embodiment, the processor is used to run program code stored in memory or process data, such as running a hybrid vehicle passenger compartment direct cooling and heating thermal management system to implement the hybrid vehicle passenger compartment direct cooling and heating thermal management method in Embodiment 1.

[0109] Example 6:

[0110] This application also provides a computer-readable storage medium, such as flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, disk, optical disk, server, App application store, etc., which stores a computer program. When the program is executed by a processor, it implements the corresponding function. In this embodiment, the computer-readable storage medium is used to store the program code of the hybrid vehicle passenger compartment direct cooling and direct heating thermal management system. When executed by a processor, it implements the hybrid vehicle passenger compartment direct cooling and direct heating thermal management method in Embodiment 1.

[0111] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0112] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A direct cooling and heating thermal management system for the passenger compartment of a hybrid vehicle, characterized in that, include: Refrigerant circuit, motor water circuit, battery water circuit, heater water circuit; The refrigerant circuit includes a compressor, an in-vehicle condenser, an external heat exchanger, an in-vehicle evaporator, and a first heat exchanger, all connected by pipes and valves. The motor water circuit is connected to the battery water circuit via a four-way water valve; The refrigerant circuit exchanges heat with the battery water circuit through the first heat exchanger; The battery water circuit exchanges heat with the warm air water circuit through a second heat exchanger; The refrigerant circuit includes: The first refrigerant circuit consists of a compressor, an in-vehicle condenser, a combination valve, an external heat exchanger, and a second shut-off valve connected in sequence. The refrigerant second circuit consists of a compressor, an in-vehicle condenser, a combination valve, an external heat exchanger, a second electronic expansion valve, and an in-vehicle evaporator connected in sequence. The refrigerant third circuit consists of a compressor, an in-vehicle condenser, a combination valve, an external heat exchanger, a third electronic expansion valve, and a first heat exchanger connected in sequence. The combined valve includes a first shut-off valve and a first electronic expansion valve connected in parallel. The battery water circuit includes: The battery first water circuit consists of a battery, a four-way water valve, a first heat exchanger, a second three-way water valve, and a battery water pump connected in sequence. The battery second water circuit consists of a battery, a four-way water valve, a first heat exchanger, a second three-way water valve, and a second heat exchanger connected in sequence. The motor water circuit includes: The first water circuit of the motor consists of a motor-pump, a motor, a four-way water valve, and a first three-way water valve connected in sequence. The second water circuit for the motor consists of a motor-driven water pump, a motor, a motor circuit radiator, and a first three-way water valve connected in sequence. The heating water circuit includes the engine, the second heat exchanger, and the heating core connected in sequence; The refrigerant circuit is coupled to the motor water circuit and the battery water circuit through the first heat exchanger, so that the refrigerant circuit can both cool and heat the crew compartment through the operation of the compressor, and also recover the waste heat of the motor and battery through the heat exchanger. In the motor waste heat heating mode, the heat of the motor water circuit is absorbed through the first heat exchanger, and then the refrigerant is used to heat the crew compartment. In the low temperature environment, the opening and closing of the third electronic expansion valve is controlled so that the motor waste heat can be preferentially supplied to the battery for heating. Furthermore, the heater water circuit containing the engine and the battery water circuit are coupled together using a second heat exchanger, so that the battery water circuit can effectively utilize the engine's waste heat to heat the battery.

2. The hybrid vehicle passenger compartment direct cooling and direct heating thermal management system according to claim 1, characterized in that, The heater core contains a low-pressure air PTC.

3. The hybrid vehicle passenger compartment direct cooling and direct heating thermal management system according to claim 1, characterized in that, This includes fans used to enhance the heat exchange efficiency of motor circuit radiators, external heat exchangers, and air.

4. A method for direct cooling and heating thermal management of a hybrid vehicle passenger compartment using the direct cooling and heating thermal management system of any one of claims 1-3, characterized in that, include: In response to the heating demand of the passenger compartment, the compressor is turned on, so that the refrigerant flows from the compressor through the in-vehicle condenser and the external heat exchanger in sequence before returning to the compressor. Alternatively, the compressor can be turned on to allow the refrigerant to flow sequentially from the compressor through the in-vehicle condenser, the out-of-vehicle heat exchanger, and the in-vehicle evaporator before returning to the compressor. In response to the cooling needs of the passenger compartment, the compressor is turned on, so that the refrigerant flows from the compressor through the condenser, the external heat exchanger, and the internal evaporator before returning to the compressor.

5. The method for direct cooling and heating thermal management of the passenger compartment in a hybrid vehicle according to claim 4, characterized in that, include: In response to the heating demand of the passenger compartment, the compressor is turned on, so that the refrigerant flows from the compressor through the in-vehicle condenser, the external heat exchanger, and the first heat exchanger before returning to the compressor. At the same time, the four-way water valve is controlled to connect the motor water circuit and the battery water circuit in series.

6. A car, characterized in that, The vehicle is equipped with a direct cooling and heating thermal management system for the passenger compartment as described in any one of claims 1-3.

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