Refrigerant thermal management system

Abstract

The utility model relates to the field of thermal management technology, and specifically, to a refrigerant thermal management system. The refrigerant thermal management system includes a refrigerant circuit, including a liquid storage tank, a gas-liquid separator, an electric compressor, a water-cooled condenser and a fourth refrigerant three-way joint connected end to end in sequence, as well as an air-cooled condenser, an electronic expansion valve, an evaporator, and a battery cooler; the electric drive circuit includes a first water pump, a charger, a DC converter, a microprogram controller, a motor, a proportional three-way valve, and a motor radiator connected end to end in sequence; the HVAC circuit includes a water-cooled condenser, a heater, a warm air core, and a second water pump connected end to end in sequence; the battery circuit includes a battery three-way joint, a third water pump, a battery pack, and a battery cooler connected end to end in sequence; and also includes a first four-way reversing valve and a second four-way reversing valve. In this way, the needs of complex working conditions can be met in a variety of modes in a coordinated manner.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal management, in particular to a refrigerant thermal management system. Background Art

[0002] As the market share of new energy vehicles increases, electric vehicles have increasingly stringent requirements for vehicle thermal management systems. In order to ensure the safety and comfort of electric vehicles and cope with complex working scenarios, a thermal management cycle system that can meet different environmental conditions is urgently needed.

[0003] The existing technical solutions are mainly based on indirect heat pump and direct heat pump system solutions. Disadvantages of the existing technical solutions:

[0004] (1) Insufficient cooling capacity. The indirect water cooling solution has a large specific heat capacity, small temperature difference, and poor instantaneous cooling capacity. It is difficult to meet the cooling capacity of passenger compartments in different regions and the increasing charging power requirements.

[0005] (2) Single mode switching: Many thermal management systems are too simple to meet the needs of complex working conditions, nor can they switch modes according to different environments to meet the needs. Utility Model Content

[0006] The purpose of the utility model includes, for example, providing a refrigerant thermal management system that can collaboratively meet the needs of complex working conditions in multiple modes.

[0007] The embodiments of the present invention can be implemented as follows:

[0008] In a first aspect, the utility model provides a refrigerant thermal management system, comprising:

[0009] The refrigerant circuit includes a first refrigerant three-way joint, a liquid storage tank, a second refrigerant three-way joint, a third refrigerant three-way joint, a gas-liquid separator, an electric compressor, a water-cooled condenser and a fourth refrigerant three-way joint, and a first refrigerant sub-pipeline, a second refrigerant sub-pipeline, a third refrigerant sub-pipeline and a fourth refrigerant sub-pipeline connected end to end in sequence; the first refrigerant sub-pipeline and the second refrigerant sub-pipeline are connected in parallel to each other and are arranged between the first refrigerant three-way joint and the fourth refrigerant three-way joint; and a refrigerant line from the fourth refrigerant three-way joint to the first refrigerant three-way joint is provided. In the direction of the head, the first stop valve is arranged in the first refrigerant sub-pipeline, the first full-through electronic expansion valve and the air-cooled condenser are arranged in sequence in the second refrigerant sub-pipeline; the third refrigerant sub-pipeline and the fourth refrigerant sub-pipeline are connected in parallel with each other and arranged between the second refrigerant three-way joint and the third refrigerant three-way joint; and from the second refrigerant three-way joint to the third refrigerant three-way joint, the electronic expansion valve and the evaporator are arranged in sequence in the third refrigerant sub-pipeline, and the second full-through electronic expansion valve and the battery cooler are arranged in the fourth refrigerant sub-pipeline;

[0010] The electric drive circuit includes a first electric drive three-way connector, a first water pump, a charger, a DC converter, a microprogram controller, a motor, a proportional three-way valve, a third electric drive three-way connector, a first three-way stop valve, and a motor radiator, which are sequentially connected end to end; and an electric drive sub-pipeline arranged between the first three-way stop valve and the first electric drive three-way connector, and the electric drive sub-pipeline is arranged across the motor radiator;

[0011] The HVAC circuit includes a water-cooled condenser, a heater, a first HVAC three-way joint, a second stop valve, a heater core, a second HVAC three-way joint, and a second water pump, which are connected end to end in sequence; and a first HVAC sub-pipeline, a second HVAC sub-pipeline, and a third HVAC sub-pipeline; the inlet of the first HVAC sub-pipeline is connected to the first HVAC three-way joint, and the first HVAC sub-pipeline is provided with a second three-way stop valve; an outlet of the second three-way stop valve is connected to an inlet of the third electric drive three-way joint; the second HVAC sub-pipeline is respectively connected to the second three-way stop valve and the third electric drive three-way joint; the inlet of the third HVAC sub-pipeline is connected to an outlet of the proportional three-way valve, and the outlet of the third HVAC sub-pipeline is connected to an inlet of the second HVAC three-way joint;

[0012] The battery circuit includes a battery three-way connector, a third water pump, a battery pack, and a battery cooler connected end to end in sequence; the outlet of the first HVAC sub-pipeline is connected to the inlet of the battery three-way connector;

[0013] It also includes a first four-way reversing valve and a second four-way reversing valve; two valve ports of the first four-way reversing valve are arranged between the battery three-way connector and the battery cooler, and the other two valve ports of the first four-way reversing valve are arranged between the third electric drive three-way connector and the first three-way stop valve; two valve ports of the second four-way reversing valve are arranged between the battery pack and the battery cooler; the other two valve ports of the second four-way reversing valve are arranged between the motor and the proportional three-way valve.

[0014] In an optional embodiment, a cooling fan is further included, and the cooling fan can at least cooperate with the motor radiator.

[0015] In an optional embodiment, the heater core and the evaporator share a same blower fan.

[0016] In an optional embodiment, the heater is a PTC heater.

[0017] In an optional embodiment, a kettle is also included;

[0018] The inlet of the kettle is connected between the motor radiator and the first electric drive three-way joint, and one outlet of the kettle is connected between the first electric drive three-way joint and the first water pump.

[0019] In an optional embodiment, it further includes a second electric drive three-way joint arranged between the first electric drive three-way joint and the first water pump; an outlet of the kettle is connected to the inlet of the second electric drive three-way joint.

[0020] In an optional embodiment, another outlet of the kettle is connected between the second HVAC three-way joint and the second water pump.

[0021] In an optional embodiment, the refrigerant circuit uses R134A refrigerant.

[0022] In an optional embodiment, when the first three-way stop valve is in operation, only one of the three valve ports can be used as an inlet and the other as an outlet, and both valve ports cannot be used as outlets;

[0023] When the second three-way stop valve is in operation, only one of the three valve ports can be used as an inlet and the other as an outlet, and both valve ports cannot be used as outlets;

[0024] When the proportional three-way valve is in operation, one of the three valve ports can be used as an inlet and the other two valve ports can be used as outlets.

[0025] In an optional embodiment, the battery cooler is a plate heat exchanger.

[0026] The beneficial effects of the embodiments of the present utility model include, for example:

[0027] The refrigerant circuit of this scheme system can switch modes through a multi-way valve, which can meet the thermal management requirements of the whole vehicle in different seasons and different working conditions. The main components of the refrigerant circuit are: compressor, water-cooled condenser, air-cooled condenser, evaporator, chiller, liquid storage tank, gas-liquid separator, full-pass electronic expansion valve, electronic expansion valve, and stop valve. The existence of water-cooled condenser and air-cooled condenser can improve the cooling capacity. The existence of liquid storage tank and gas-liquid separator can control superheat or subcooling, or both, which can improve the COP of the system. The main components of the electric drive water circuit are: motor radiator and water pump. The main components of the battery water circuit are: water pump. The main components of the HVAC water circuit are: water pump, water-cooled condenser, water heater, warm air core, and stop valve. The water circuit is equipped with a kettle and a multi-way valve, which can switch different modes according to the thermal management requirements to adapt to more complex environmental conditions. This has the advantages of improving cooling capacity, improving COP, and multi-mode switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of a refrigerant thermal management system according to an embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the embodiment of the utility model in LOOP1-air-cooled condenser single cooling;

[0031] Figure 3 This is a schematic diagram of the embodiment of the utility model in LOOP1-series secondary cooling;

[0032] Figure 4 It is a schematic diagram of an embodiment of the present utility model in LOOP1-supercharging condition;

[0033] Figure 5 It is a schematic diagram of the embodiment of the utility model in LOOP2-dehumidification;

[0034] Figure 6 It is a schematic diagram of an embodiment of the utility model in LOOP2-filling mode;

[0035] Figure 7 This is a schematic diagram of the battery temperature equalization in LOOP3 of the embodiment of the utility model;

[0036] Figure 8 It is a schematic diagram of LOOP3-auxiliary heating in an embodiment of the utility model.

[0037] Icons: 01-condenser; 02-first stop valve; 03-second stop valve; 04-first full-pass electronic expansion valve; 05-second full-pass electronic expansion valve; 06-electronic expansion valve; 07-first three-way stop valve; 08-second three-way stop valve; 09-proportional three-way valve; 10-cooling fan; 11-blower fan; 12-motor radiator; 13-liquid storage tank; 14-first water pump; 15-second water pump; 16-third water pump; 17-charger; 18-DC converter; 19-microprogram controller; 20-motor; 21-water-cooled condenser; 22-electric Compressor; 23-heater; 24-heater core; 25-evaporator; 26-battery cooler; 27-first four-way reversing valve; 28-second four-way reversing valve; 29-kettle; 30-gas-liquid separator; 110-first refrigerant three-way connector; 120-second refrigerant three-way connector; 130-third refrigerant three-way connector; 140-fourth refrigerant three-way connector; 210-first electric drive three-way connector; 220-second electric drive three-way connector; 230-third electric drive three-way connector; 310-first HVAC three-way connector; 320-second HVAC three-way connector; 400-battery three-way connector. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0042] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0043] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0044] For ease of understanding, the Chinese meanings of the English names involved in this embodiment and the drawings of the specification refer to the following table:

[0045]

[0046]

[0047] Please refer to Figure 1 , this embodiment provides a refrigerant thermal management system, including:

[0048] The refrigerant circuit includes a first refrigerant three-way joint 110, a liquid storage tank 13, a second refrigerant three-way joint 120, a third refrigerant three-way joint 130, a gas-liquid separator 30, an electric compressor 22, a water-cooled condenser 21 and a fourth refrigerant three-way joint 140, which are connected end to end in sequence, as well as a first refrigerant sub-pipeline, a second refrigerant sub-pipeline, a third refrigerant sub-pipeline and a fourth refrigerant sub-pipeline; the first refrigerant sub-pipeline and the second refrigerant sub-pipeline are connected in parallel to each other and are arranged between the first refrigerant three-way joint 110 and the fourth refrigerant three-way joint 140; and from the fourth refrigerant three-way joint 140 to the first refrigerant three-way joint In the direction of the joint 110, the first stop valve 02 is arranged in the first refrigerant sub-pipeline, the first full-through electronic expansion valve 04 and the air-cooled condenser 01 are arranged in the second refrigerant sub-pipeline in sequence; the third refrigerant sub-pipeline and the fourth refrigerant sub-pipeline are arranged in parallel between the second refrigerant three-way joint 120 and the third refrigerant three-way joint 130; and from the second refrigerant three-way joint 120 to the third refrigerant three-way joint 130, the electronic expansion valve 06 and the evaporator 25 are arranged in the third refrigerant sub-pipeline in sequence, and the second full-through electronic expansion valve 05 and the battery cooler 26 are arranged in the fourth refrigerant sub-pipeline;

[0049] The electric drive circuit includes a first electric drive three-way connector 210, a first water pump 14, a charger 17, a DC converter 18, a microprogram controller 19, a motor 20, a proportional three-way valve 09, a third electric drive three-way connector 230, a first three-way stop valve 07, and a motor radiator 12 connected end to end in sequence; and an electric drive sub-pipeline arranged between the first three-way stop valve 07 and the first electric drive three-way connector 210, and the electric drive parallel pipeline is arranged across the motor radiator 12;

[0050] The HVAC circuit includes a water-cooled condenser 21, a heater 23, a first HVAC three-way joint 310, a second stop valve 03, a heater core 24, a second HVAC three-way joint 320, and a second water pump 15, which are connected end to end in sequence; and a first HVAC sub-pipeline, a second HVAC sub-pipeline, and a third HVAC sub-pipeline; the inlet of the first HVAC sub-pipeline is connected to the first HVAC three-way joint 310, and the first HVAC sub-pipeline is provided with a second three-way stop valve 08; an outlet of the second three-way stop valve 08 is connected to an inlet of the third electric drive three-way joint 230; the second HVAC sub-pipeline is respectively connected to the second three-way stop valve 08 and the third electric drive three-way joint 230; the inlet of the third HVAC sub-pipeline is connected to an outlet of the proportional three-way valve 09, and the outlet of the third HVAC sub-pipeline is connected to an inlet of the second HVAC three-way joint 320;

[0051] The battery circuit includes a battery three-way connector 400, a third water pump 16, a battery pack, and a battery cooler 26 connected end to end in sequence; the outlet of the first HVAC sub-pipeline is connected to the inlet of the battery three-way connector 400;

[0052] It also includes a first four-way reversing valve 27 and a second four-way reversing valve 28; two valve ports of the first four-way reversing valve 27 are arranged between the battery three-way connector 400 and the battery cooler 26, and the other two valve ports of the first four-way reversing valve 27 are arranged between the third electric drive three-way connector 230 and the first three-way stop valve 07; two valve ports of the second four-way reversing valve 28 are arranged between the battery pack and the battery cooler 26; the other two valve ports of the second four-way reversing valve 28 are arranged between the motor 20 and the proportional three-way valve 09.

[0053] The thermal management system of this embodiment adopts R134A refrigerant, which is divided into a refrigerant circuit, an electric drive water circuit, a battery water circuit, and a HVAC water circuit. The refrigerant circuit is arranged with an air-cooled condenser 01, which can ensure that there is still excellent refrigeration capacity when the external ambient temperature is high, and ensure the comfort of the passenger compartment. In scenarios where a larger cooling capacity is required, such as super fast charging, it is also possible to choose to turn on the water-cooled condenser 21 and the air-cooled condenser 01 at the same time for secondary cooling to further improve the refrigeration capacity. The gas-liquid separator 30 and the liquid storage tank 13 can be arranged separately in the low-pressure circuit and the high-pressure circuit, or an integrated structural design can be adopted, with one chamber performing the function of the gas-liquid separator 30 and the other chamber performing the function of the liquid storage tank 13. Therefore, the refrigerant circuit of the system can be controlled by superheat or subcooling, or it can be controlled by superheat and subcooling at the same time, further improving the COP of the system. The water circuit is connected through a kettle 29 and a multi-way valve, and different modes can be formed by cooperation to meet the needs of different working conditions.

[0054] Optionally, the refrigerant thermal management system further includes a cooling fan 10 , and the cooling fan 10 can at least cooperate with the motor radiator 12 .

[0055] Optionally, the heater core 24 and the evaporator 25 share the same blower fan 11. This improves the integration of the thermal management system and improves space utilization.

[0056] Optionally, the heater 23 is a PTC heater 23. Generally refers to materials or components with a large positive temperature coefficient. PTC is generally used as the heat source of the air conditioner in electric vehicles, so it is often called electric heating. When a traditional car uses air conditioning for heating, its heat source is often the heat of the engine coolant, so in winter, it often takes a while for the vehicle to run to increase the engine temperature before the air conditioning heating effect is obvious.

[0057] Optionally, the refrigerant thermal management system further includes a kettle 29; the inlet of the kettle 29 is connected between the motor radiator 12 and the first electric drive three-way joint 210, and one outlet of the kettle 29 is connected between the first electric drive three-way joint 210 and the first water pump 14. The refrigerant thermal management system further includes a second electric drive three-way joint 220 disposed between the first electric drive three-way joint 210 and the first water pump 14; one outlet of the kettle 29 is connected to the inlet of the second electric drive three-way joint 220. Another outlet of the kettle 29 is connected between the second HVAC three-way joint 320 and the second water pump 15.

[0058] Optionally, when the first three-way stop valve 07 is in operation, only one of the three valve ports can be used as an inlet and the other as an outlet, and both valve ports cannot be used as outlets;

[0059] When the second three-way stop valve 08 is in operation, only one of the three valve ports can be used as an inlet and the other as an outlet, and both valve ports cannot be used as outlets;

[0060] When the proportional three-way valve 09 is in operation, one of the three valve ports can be used as an inlet and the other two valve ports can be used as outlets.

[0061] Optionally, the battery cooler 26 is a plate heat exchanger. In a plate heat exchanger, low-temperature liquid refrigerant and high-temperature coolant exchange heat inside. The liquid refrigerant absorbs heat and evaporates into gas, and the coolant is cooled. In this way, rapid cooling of the battery is achieved.

[0062] As can be seen from the figure, the first four-way reversing valve 27 and the second four-way reversing valve 28 both have four openings a, b, c, and d; any two of the four openings can be connected.

[0063] It can also be seen from the figure that the first three-way stop valve 07 (i.e., TWSV_1) has three openings, A, B, and C;

[0064] The second three-way stop valve 08 (i.e., TWSV_2) has three openings A, B, and C;

[0065] The proportional three-way valve 09 (ie, TWSV_3 ) has three openings, A, B, and C.

[0066] When in use, the refrigerant thermal management system has at least the following working modes (the thick lines in the figure represent the operating paths in the corresponding modes):

[0067] (1) LOOP1 condition

[0068] like Figure 2 As shown, when the system switches to LOOP1 mode, it is suitable for summer cooling conditions. At this time, the first four-way reversing valve 27: a→b; c→d.

[0069] The second four-way reversing valve 28: a→b; c→d.

[0070] Electric drive water circuit: first four-way reversing valve 27: a→b; first three-way stop valve 07 (ie, TWSV_1): C→B; second four-way reversing valve 28: c→d; proportional three-way valve 09 (ie, TWSV_3): A→C.

[0071] Battery water circuit: first four-way reversing valve 27: c→d; second four-way reversing valve 28: a→b.

[0072] The refrigerant circuit closes the first stop valve 02 (ie, SOV_1), and through the first full-pass electronic expansion valve 04, a single-dual steam mode can be performed to meet the requirements of passenger compartment cooling and battery cooling.

[0073] The electric drive water circuit dissipates heat through the radiator of the motor 20.

[0074] At this time, the water pump of the HVAC water circuit can be turned off, and only the air-cooled condenser 01 is used for cooling.

[0075] like Figure 3 As shown, the passenger compartment, battery circuit, and electric drive circuit can be cooled at this time. The two condensers are operated in series. If a large cooling capacity is required, the water pump can be turned on, and the water-cooled condenser 21 and the air-cooled condenser 01 can be connected in series for secondary cooling to improve the cooling capacity and meet the cooling demand.

[0076] It should be noted that if Figure 4 The figure shows the flow chart of the refrigerant thermal management system under supercharging conditions. At this time, there is no one in the cabin, and the passenger compartment assists in heat dissipation.

[0077] (2) LOOP2 working condition

[0078] like Figure 5 As shown in the figure, when the system switches to LOOP2 mode, it can be used in spring and autumn conditions.

[0079] The first four-way reversing valve 27: a→b; c→d.

[0080] The second four-way reversing valve 28: a→d; c→b.

[0081] The battery water circuit and the electric drive water circuit are connected in series: the first four-way reversing valve 27: a→b; the first three-way stop valve 07 (ie, TWSV_1): C→B; the second four-way reversing valve 28: c→b; the first four-way reversing valve 27: c→d; the second four-way reversing valve 28: a→d; the proportional three-way valve 09 (ie, TWSV_3): A→C.

[0082] The refrigerant circuit closes the first stop valve 02 (i.e. SOV_1), and the single steam mode is performed through the first full-pass electronic expansion valve 04. At this time, the HVAC circuit starts the second water pump 15 (i.e. pump_2). After heat exchange with the water-cooled condenser 21, the hot liquid can flow through the warm air core 24 through the second stop valve 03 (i.e. SOV_2). At this time, the second three-way stop valve 08 (i.e. TWSV_2) is fully closed. The blower fan 11 (i.e. Fan_2) is turned on, and the warm air core 24 circulates hot water for heating. The refrigerant evaporates in the evaporator 25 (i.e. EVAP) for cooling. After the cold and hot air are mixed by blowing, they are blown into the passenger compartment for dehumidification.

[0083] like Figure 6As shown, this is the filling mode. All coolant circuits are connected in series to fill the coolant. In LOOP2 mode, the refrigerant circuit does not work, and the second three-way stop valve 08 (i.e. TWSV_2) and the proportional three-way valve 09 (i.e. TWSV_3) are all opened. At this time, the electric drive water circuit, the battery water circuit and the HVAC water circuit are connected in series, and the system enters the filling mode, and the coolant can be filled.

[0084] (3) LOOP3 working condition

[0085] like Figure 7 As shown in the figure, when the system switches to LOOP3 mode, it is suitable for winter heat pump operation. At this time:

[0086] The first four-way reversing valve 27: a→d; c→b.

[0087] The second four-way reversing valve 28: a→d; c→b.

[0088] Electric drive water circuit: first four-way reversing valve 27: c→b; first three-way stop valve 07 (ie, TWSV_1): C→A / B; second four-way reversing valve 28: c→b.

[0089] Battery water circuit: first four-way reversing valve 27: a→d; second four-way reversing valve 28: a→d; proportional three-way valve 09 (ie, TWSV_3): A→B / C.

[0090] When the external environment is low and the heat pump is in operation, there is a heating demand in the passenger compartment and the battery circuit is at an even temperature, the refrigerant circuit closes the first stop valve 02 (i.e., SOV_1) and opens the first full-pass electronic expansion valve 04. At this time, the refrigerant is throttled and can absorb heat from the air source through the air-cooled condenser 01 and recover it to the battery cooler 26 (i.e., Chiller). The first three-way stop valve 07 (i.e., TWSV_1) of the electric drive circuit: C→A, and heat exchange is performed through the battery cooler 26 (i.e., Chiller) to recover the waste heat of the electric drive. In order to meet the heating demand of the passenger compartment, the second water pump 15 (i.e., pump_2) of the HVAC water pump is turned on, the coolant absorbs the heat of the water-cooled condenser 21, and the second stop valve 03 (i.e., SOV_2) is opened, and the hot liquid is introduced into the warm air core 24 to achieve heating. At this time, the second three-way stop valve 08 (i.e., TWSV_2) is fully closed.

[0091] like Figure 7 As shown, this is the battery temperature equalization mode, winter heating, motor 20 waste heat recovery, evaporative condenser 01 waste heat recovery, and battery temperature equalization without heating request.

[0092] like Figure 8As shown, this is LOOP3-auxiliary heating. When the external environment is extremely low, under the heat pump working condition, there is a heating demand for the passenger compartment and the battery circuit. At this time, the refrigerant can no longer absorb heat from the air source, so the refrigerant circuit opens the first stop valve 02 (ie SOV_1) and closes the first full-pass electronic expansion valve 04. The electric drive circuit can still use the first three-way stop valve 07 (ie TWSV_1): C→A, and use the battery cooler 26 (ie Chiller) to perform heat exchange to recover the waste heat of the electric drive, but the waste heat recovery effect at this time is already minimal. In order to meet the needs of battery heating and passenger compartment heating, it is necessary to open the high-pressure water heater (i.e. WPTC) for auxiliary heating. At this time, the second stop valve 03 (i.e. SOV_2) and the second three-way stop valve 08 (i.e. TWSV_2) are opened: B→C. At this time, the warm air core 24 circuit and the battery circuit are connected in parallel. After the high-pressure water heater (i.e. WPTC) heats the coolant in the heating circuit, the opening size of the second stop valve 03 (i.e. SOV_2) and the second three-way stop valve 08 (i.e. TWSV_2): B→C can be adjusted according to the needs to adjust the hot liquid to meet the different heating temperature requirements of the passenger compartment and the battery. At this time, the proportional three-way valve 09 (i.e. TWSV_3): A→B / C.

[0093] In summary, the embodiment of the utility model provides a refrigerant thermal management system, which has at least the following advantages:

[0094] Mode switching after the water multi-way valves cooperate with each other;

[0095] In supercharge mode, the passenger compartment also provides auxiliary cooling;

[0096] The system subcooling and system superheating can be controlled simultaneously, or the superheating and subcooling can be controlled separately;

[0097] The water-cooled condenser 21 and the air-cooled condenser 01 can be used in series under special working conditions;

[0098] The air-cooled condenser 01 can recover waste heat through the regulation of the first full-pass electronic expansion valve 04;

[0099] In LOOP3 mode, when the high-pressure water heater (i.e., WPTC) performs auxiliary heating, the battery circuit and the circuit of the heater core 24 are connected in parallel to distribute heat, thereby avoiding the dilemma of sacrificing the heating performance of one of them due to different temperatures required for the passenger compartment and the battery when connected in series.

[0100] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A refrigerant thermal management system, characterized in that: include: A refrigerant circuit comprises a first refrigerant three-way joint (110), a liquid storage tank (13), a second refrigerant three-way joint (120), a third refrigerant three-way joint (130), a gas-liquid separator (30), an electric compressor (22), a water-cooled condenser (21) and a fourth refrigerant three-way joint (140) which are connected end to end in sequence, as well as a first refrigerant sub-pipeline, a second refrigerant sub-pipeline, a third refrigerant sub-pipeline and a fourth refrigerant sub-pipeline; the first refrigerant sub-pipeline and the second refrigerant sub-pipeline are connected in parallel to each other and are arranged between the first refrigerant three-way joint (110) and the fourth refrigerant three-way joint (140); and from the fourth refrigerant three-way joint (140) to the first refrigerant three-way joint (110), the first stop valve (02) is arranged in the first refrigerant sub-pipeline, the first full-through electronic expansion valve (04) and the air-cooled condenser (01) are arranged in sequence in the second refrigerant sub-pipeline; the third refrigerant sub-pipeline and the fourth refrigerant sub-pipeline are connected in parallel and arranged between the second refrigerant three-way joint (120) and the third refrigerant three-way joint (130); and in the direction from the second refrigerant three-way joint (120) to the third refrigerant three-way joint (130), the electronic expansion valve (06) and the evaporator (25) are arranged in sequence in the third refrigerant sub-pipeline, and the second full-through electronic expansion valve (05) and the battery cooler (26) are arranged in the fourth refrigerant sub-pipeline; An electric drive circuit comprises a first electric drive three-way connector (210), a first water pump (14), a charger (17), a DC converter (18), a microprogram controller (19), a motor (20), a proportional three-way valve (09), a third electric drive three-way connector (230), a first three-way stop valve (07), and a motor radiator (12) which are connected end to end in sequence; and an electric drive sub-pipeline arranged between the first three-way stop valve (07) and the first electric drive three-way connector (210), wherein the electric drive sub-pipeline is arranged across the motor radiator (12); The HVAC circuit comprises a water-cooled condenser (21), a heater (23), a first HVAC three-way joint (310), a second stop valve (03), a heater core (24), a second HVAC three-way joint (320), and a second water pump (15) which are connected end to end in sequence; and a first HVAC sub-pipeline, a second HVAC sub-pipeline, and a third HVAC sub-pipeline; the inlet of the first HVAC sub-pipeline is connected to the first HVAC three-way joint (310), and the first HVAC sub-pipeline is provided with a second three-way stop valve (08); an outlet of the second three-way stop valve (08) is connected to an inlet of the third electric drive three-way joint (230); the second HVAC sub-pipeline is respectively connected to the second three-way stop valve (08) and the third electric drive three-way joint (230); the inlet of the third HVAC sub-pipeline is connected to an outlet of the proportional three-way valve (09), and the outlet of the third HVAC sub-pipeline is connected to an inlet of the second HVAC three-way joint (320); The battery circuit comprises a battery three-way connector (400), a third water pump (16), a battery pack, and a battery cooler (26) which are connected end to end in sequence; the outlet of the first HVAC sub-pipeline is connected to the inlet of the battery three-way connector (400); The invention also comprises a first four-way reversing valve (27) and a second four-way reversing valve (28); two valve ports of the first four-way reversing valve (27) are arranged between the battery three-way connector (400) and the battery cooler (26); the other two valve ports of the first four-way reversing valve (27) are arranged between the third electric drive three-way connector (230) and the first three-way stop valve (07); the two valve ports of the second four-way reversing valve (28) are arranged between the battery pack and the battery cooler (26); the other two valve ports of the second four-way reversing valve (28) are arranged between the motor (20) and the proportional three-way valve (09).

2. The refrigerant thermal management system according to claim 1, characterized in that: It also includes a heat dissipation fan (10), which can at least cooperate with the motor radiator (12).

3. The refrigerant thermal management system according to claim 1, characterized in that: The warm air core (24) and the evaporator (25) share the same blower fan (11).

4. The refrigerant thermal management system according to claim 1, characterized in that: The heater (23) is a PTC heater (23).

5. The refrigerant thermal management system according to claim 1, characterized in that: Also included is a kettle (29); An inlet of the kettle (29) is connected between the motor radiator (12) and the first electric drive three-way connector (210), and an outlet of the kettle (29) is connected between the first electric drive three-way connector (210) and the first water pump (14).

6. The refrigerant thermal management system according to claim 5, characterized in that: It also includes a second electric drive three-way connector (220) arranged between the first electric drive three-way connector (210) and the first water pump (14); an outlet of the kettle (29) is connected to an inlet of the second electric drive three-way connector (220).

7. The refrigerant thermal management system according to claim 5, characterized in that: Another outlet of the kettle (29) is connected between the second HVAC three-way connector (320) and the second water pump (15).

8. The refrigerant thermal management system according to claim 1, characterized in that: The refrigerant circuit uses R134A refrigerant.

9. The refrigerant thermal management system according to claim 1, characterized in that: When the first three-way stop valve (07) is in operation, only one of the three valve ports can be used as an inlet and the other as an outlet, and both valve ports cannot be used as outlets; When the second three-way stop valve (08) is in operation, only one of the three valve ports can be used as an inlet and the other as an outlet, and both valve ports cannot be used as outlets; When the proportional three-way valve (09) is in operation, one of the three valve ports can be used as an inlet and the other two valve ports can be used as outlets.

10. The refrigerant thermal management system according to claim 1, characterized in that: The battery cooler (26) is a plate heat exchanger.

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