CN216507794U - Double-secondary-loop heat management system and electric vehicle - Google Patents

Abstract

The utility model discloses a double-secondary-circuit heat management system and an electric vehicle. The compressor module comprises a compressor, a condenser, an expansion valve and an evaporator which are sequentially connected. The recooling device is provided with a first recooling passage and a second recooling passage, two ends of the first recooling passage are respectively connected with a first condensing passage of the compressor and the condenser, and an outlet of the second recooling passage is connected with a main heat exchanger of the electric vehicle. The regenerator is provided with a first regenerative passage and a second regenerative passage, two ends of the first regenerative passage are connected with the first condensing passage and the expansion valve, and the second regenerative passage is connected with the first evaporating passage of the compressor and the evaporator. The double-secondary-loop heat management system solves the heat management requirements of the battery, the motor, the passengers and dehumidification and demisting, and can improve the energy efficiency under each working condition so as to achieve the purpose of prolonging the driving mileage of the electric vehicle under the full-weather condition.

Description

Double-secondary-loop heat management system and electric vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a dual-secondary-circuit heat management system and an electric vehicle.

Background

When the environment temperature is higher, the motor and the battery need to dissipate heat, and when the environment temperature is lower, the passenger and the battery need to be heated, so that the energy of the electric vehicle is saved, the driving mileage of the electric vehicle is prolonged, and the electric vehicle needs to be realized by adopting a refrigeration and heating system (heat pump) with high energy efficiency. The heating performance of the existing heat management system of the electric vehicle is poor, the battery cannot be heated, and the energy-saving effect is poor although the heat pump effect is achieved in a medium-low temperature environment.

SUMMERY OF THE UTILITY MODEL

The utility model provides a double-secondary-loop heat management system, which solves the heat management requirements of a battery, a motor, passengers and dehumidification and demisting, and can improve the energy efficiency under various working conditions so as to achieve the purpose of prolonging the driving mileage of an electric vehicle under the full-weather condition.

A second object of the present invention is to provide an electric vehicle having a long driving range under all weather conditions.

In order to achieve the technical effects, the technical scheme of the utility model is as follows:

the utility model discloses a double secondary circuit heat management system, comprising: the compressor module comprises a compressor, a condenser, an expansion valve and an evaporator which are sequentially connected; the recooling device is provided with a first recooling passage and a second recooling passage, two ends of the first recooling passage are respectively connected with the compressor and a first condensing passage of the condenser, and an outlet of the second recooling passage is connected with a main heat exchanger of the electric vehicle; the heat regenerator is provided with a first heat recovery passage and a second heat recovery passage, two ends of the first heat recovery passage are connected with the first condensation passage and the expansion valve, and the second heat recovery passage is connected with the first evaporation passage of the compressor and the evaporator; the first water pump, the main heat exchanger, the battery of the electric vehicle, the motor of the electric vehicle and the second evaporation passage of the evaporator form a first refrigeration loop; the first water pump, the heat exchange water tank of the electric vehicle, the motor and the second evaporation passage form a first heating loop; the first water pump, the main heat exchanger, the motor and the second evaporation passage form a first dehumidification loop; the first water pump, the heat exchange water tank, the battery, the motor and the second evaporation passage form a reactive heat dissipation loop; the second water pump, a second condensation passage of the condenser and the heat exchange water tank form a second refrigeration loop, and the second water pump, the second condensation passage, the battery and a warm air core of the electric vehicle form a second heating loop; the second water pump, the second condensation passage and the heat exchange water tank or the second water pump, the second condensation passage, the battery and the warm air core form a second dehumidification loop; the second water pump, the second condensation passage and the heat exchange water tank form a defrosting loop; and the valve assembly is used for switching the connection and disconnection of the first refrigeration loop, the second refrigeration loop, the first heating loop, the second heating loop, the first dehumidification loop, the second dehumidification loop, the reactive heat dissipation loop and the defrosting loop.

In some embodiments, the valve assembly comprises a first three-way proportional valve, and three openings of the first three-way proportional valve are respectively connected with the water outlet of the first water pump, the liquid inlet of the heat exchange water tank and the inlet of the main heat exchanger.

In some embodiments, the valve assembly includes a second three-way proportional valve, and three openings of the second three-way proportional valve are respectively connected to the water inlet of the second water pump, the liquid inlet of the heat exchange water tank, and the inlet of the warm air core.

In some embodiments, the valve assembly includes a third three-way proportional valve, and three openings of the third three-way proportional valve are respectively connected to the heat exchange outlet of the main heat exchanger, the heat exchange inlet of the battery, and the heat exchange inlet of the motor.

In some specific embodiments, the valve assembly includes a fourth three-way proportional valve, a first opening of the fourth three-way proportional valve is connected to the heat exchange inlet of the battery, a second opening of the fourth three-way proportional valve is connected to an opening of the third three-way proportional valve connected to the heat exchange inlet of the battery and the heat exchange outlet of the warm air core, and a third opening of the fourth three-way proportional valve is connected to the heat exchange inlet of the motor, the liquid outlet of the heat exchange water tank, and the second condensation path of the condenser.

In some more specific embodiments, the valve assembly includes a fifth three-way proportional valve having a first opening connected to the second condensing passage, a second opening connected to the heat exchange outlet of the motor, and a third opening connected to the heat exchange inlet of the motor and an opening of the fourth three-way proportional valve connected to the heat exchange inlet of the motor.

In some more specific embodiments, the valve assembly includes a sixth three-way proportional valve, and three openings of the sixth three-way proportional valve are respectively connected with the second condensation path, the liquid outlet of the heat exchange water tank, and an opening of a fifth three-way proportional valve connected with the second condensation path.

In some more specific embodiments, the valve assembly comprises: three openings of the seventh three-way proportional valve are respectively connected with a heat exchange inlet of the motor, a liquid outlet of the heat exchange water tank and an opening of the sixth three-way proportional valve connected with the liquid outlet of the heat exchange water tank; the first opening of the eighth three-way proportional valve is connected with the heat exchange inlet of the motor, the second opening of the eighth three-way proportional valve is connected with the opening of the seventh three-way proportional valve connected with the heat exchange inlet of the motor and the opening of the fifth three-way proportional valve connected with the heat exchange inlet of the motor, and the third opening of the eighth three-way proportional valve is connected with the opening of the fourth three-way proportional valve connected with the heat exchange inlet of the motor.

In some embodiments, the refrigerant in the compressor module is R290 refrigerant.

The utility model also discloses an electric vehicle which comprises the double-secondary-loop thermal management system.

The double-secondary loop thermal management system has the beneficial effects that: due to the fact that the refrigerating working condition, the heating working condition, the dehumidifying working condition, the reactive heat dissipation working condition and the comfortable defrosting mode are achieved, the heat management requirements of the battery, the motor, the passenger and dehumidification and defrosting can be met. The motor and the battery can be cooled under the refrigerating working condition, the phenomenon that the motor and the battery are overheated is avoided, and the heating of the motor is utilized to heat a heat exchange medium under the refrigerating working condition, so that the heat can be still well heated at a lower temperature, and the energy consumption of the compressor can be reduced. Under the dehumidification working condition, the battery of the passenger compartment and the warm air core body can be dehumidified, and the phenomenon that condensed water drops appear on the battery and the warm air core body is avoided. Under the idle heat dissipation operating mode, even if the compressor module is out of work, battery and motor still can cool down, like this at the moderate temperature state (need not in the car under the temperature state of refrigeration and heating), still can guarantee the stable work of battery and motor. Under the comfortable operating mode that changes the frost, the passenger cabin can not insufflate cold air, has promoted the comfort level, and the exhaust temperature of compressor can be reduced to the back cooler of addding for the refrigerating output and the efficiency of compressor module all obtain promoting, and the back cooler of addding can increase the super-cooled rate that the refrigerant got into the evaporimeter and get into the superheat degree of compressor, improves the heat transfer volume and the efficiency of compressor module.

The electric vehicle has the beneficial effects that: due to the double secondary loop thermal management system, the electric vehicle has long driving mileage under all weather conditions.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

FIG. 1 is a schematic diagram of a dual secondary loop thermal management system according to an embodiment of the present invention operating in a cooling mode;

FIG. 2 is a schematic diagram of the dual-secondary loop thermal management system according to an embodiment of the present invention in a heating mode;

FIG. 3 is a schematic diagram illustrating operation of a dual secondary loop thermal management system in a dehumidification mode according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the operation of a dual secondary loop thermal management system in a reactive heat dissipation condition according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the operation of a dual secondary loop thermal management system in a comfortable defrost condition according to an embodiment of the present invention.

Reference numerals:

1. a compressor; 2. a recooling device; 3. a condenser; 4. a liquid storage tank; 5. an expansion valve; 6. an evaporator; 7. a heat regenerator; 8. a first water pump; 9. a first three-way proportional valve; 10. a second three-way proportional valve; 11. a second water pump; 12. a warm air core body; 13. a primary heat exchanger; 14. a third three-way proportional valve; 15. a fourth three-way proportional valve; 16. a battery; 17. a fifth three-way proportional valve; 18. a sixth three-way proportional valve; 19. a seventh three-way proportional valve; 20. an eighth three-way proportional valve; 21. a motor; 22. a heat exchange water tank.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The specific structure of a dual secondary loop thermal management system of an embodiment of the present invention is described below with reference to fig. 1-5.

The utility model discloses a double-secondary-loop heat management system, which comprises a compressor module, a cooler 2, a heat regenerator 7, a first water pump 8 and a second water pump 11, as shown in fig. 1. The compressor module comprises a compressor 1, a condenser 3, a liquid storage tank 4, an expansion valve 5 and an evaporator 6 which are connected in sequence. The recooling device 2 is provided with a first recooling passage and a second recooling passage, two ends of the first recooling passage are respectively connected with the first condensing passages of the compressor 1 and the condenser 3, and an outlet of the second recooling passage is connected with a main heat exchanger 13 of the electric vehicle. The heat regenerator 7 has a first heat recovery path and a second heat recovery path, both ends of the first heat recovery path are respectively connected to the first condensing path and the expansion valve 5, and both ends of the second heat recovery path are respectively connected to the first evaporating paths of the compressor 1 and the evaporator 6.

Firstly, when the compressor module operates in the whole process, the compressor 1 outputs a high-temperature and high-pressure refrigerant to exchange heat with liquid in the second recooling passage (waste condensate water from the main heat exchanger 13) in the first recooling passage so as to reduce the exhaust temperature of the compressor 1, so that the refrigerating capacity and the energy efficiency of the compressor module are both improved. The refrigerant cooled by the recooling device 2 enters the condenser 3 and then exchanges heat with a heat exchange loop (namely a circulation path of cooling water or heating water) of the double-secondary loop heat management system, so that the temperature of the refrigerant is reduced, the refrigerant with the reduced temperature enters the first heat recovery path to exchange heat with a medium (a refrigerator flowing out of the evaporator 6) in the second heat recovery path, and the heat regenerator 7 has three functions, so that gas entering the compressor 1 becomes superheated steam, and harmful overheating is reduced; liquid drops carried in the return air are gasified, and liquid impact of the compressor 1 is prevented; make the liquid supercooling of entering evaporimeter 6, reduce the throttle loss to the heat transfer volume and the efficiency of compressor module have further been promoted.

It can be understood that the bicubic thermal management system of the present embodiment has the following five operating states:

refrigeration working condition:

as shown in fig. 1, the first water pump 8, the main heat exchanger 13, the battery 16 of the electric vehicle, the motor 21 of the electric vehicle, and the second evaporation path of the evaporator 6 form a first refrigeration circuit, and the second water pump 11, the second condensation path of the condenser 3, and the heat exchange water tank 22 form a second refrigeration circuit.

The compressor module is in whole-course working under the working condition, the heat exchange medium exchanges heat with the refrigerant in the first evaporation passage in the second evaporation passage of the evaporator 6, and the cooling of the heat exchange medium is realized. The first water pump 8 sends the heat exchange medium into the main heat exchanger 13 and then carries out heat exchange cooling on the air in the vehicle, so that the cold air enters the passenger compartment, the cooling water passing through the main heat exchanger 13 can be further conveyed to the battery 16 and the motor 21 to cool the battery 16 and the motor 21, and the heat exchange medium after heat exchange returns to the second evaporation passage to complete circulation. Meanwhile, the second water pump 11 sends the heat exchange medium into the second condensation path of the condenser 3, so that the refrigerant in the first condensation path of the condenser 3 is cooled to ensure the normal operation of the compressor module, the heat exchange medium after exchanging heat with the refrigerant enters the heat exchange water tank 22 to dissipate heat into the air, and the heat exchange medium after finishing heat exchange returns to the second water pump 11 to finish circulation.

Heating working conditions are as follows:

as shown in fig. 2, the first water pump 8, the heat exchange water tank 22 of the electric vehicle, the motor 21, and the second evaporation passage form a first heating circuit, and the second water pump 11, the second condensation passage, the battery 16, and the heater core 12 of the electric vehicle form a second heating circuit.

Compressor module whole journey work under this operating mode, in first water pump 8 sent heat transfer medium into heat transfer water tank 22, heat transfer medium absorbed outside heat and heaied up in heat transfer water tank 22 is inside, and the heat transfer medium after the intensification can get into the heat transfer route of motor 21, adopts the heat of motor 21 to heat transfer medium to heat up once more. The heat exchange medium heated twice enters the second evaporation passage of the evaporator 6 to exchange heat with the refrigerant in the first evaporation passage, so that the temperature of the refrigerant is increased to ensure the normal work of the compressor module, and the heat exchange medium after heat exchange returns to the first water pump 8 to complete circulation. Meanwhile, the second water pump 11 sends the heat exchange medium into the second condensation loop of the condenser 3 to exchange heat with the refrigerant in the first condensation loop of the condenser 3, the heated heat exchange medium enters the battery 16 to heat the battery 16, then enters the warm air core 12 to exchange heat with the air in the vehicle, so that the warm air enters the passenger compartment, and the heat exchange medium after heat exchange returns to the second water pump 11 to complete circulation.

And (3) dehumidification working condition:

as shown in fig. 3, the first water pump 8, the main heat exchanger 13, the motor 21, and the second evaporation passage form a first dehumidification circuit, and the second water pump 11, the second condensation passage, and the heat exchange water tank 22 or the second water pump 11, the second condensation passage, and the battery 16 and the heater core 12 form a second dehumidification circuit.

The compressor module maintains lower rotational speed operation under this operating mode, and heat transfer medium exchanges heat with the refrigerant in the first evaporation route in the second evaporation route of evaporimeter 6, realizes heat transfer medium's cooling (because the rotational speed of compressor module is lower this moment, the temperature of the refrigerator in the first evaporation route is higher relatively, and consequently heat transfer medium has carried out the cooling but still has the higher temperature under the relative refrigeration operating mode). The first water pump 8 sends the heat exchange medium into the main heat exchanger 13 to dehumidify the air in the vehicle, and then returns to the second evaporation passage through the motor 21 to complete circulation. Meanwhile, the second water pump 11 sends the heat transfer medium into the second condensation path of the condenser 3, so that the refrigerant in the first condensation path of the condenser 3 is cooled, and the heat transfer medium is heated (because the rotating speed of the compressor module is lower at this moment, the temperature of the refrigerator in the first condensation path is relatively higher, so that the heat transfer medium is still at a lower temperature under a relatively refrigerating working condition although being heated), after passing through the second condensation path, the heat transfer medium is divided into two streams, one stream flows into the heat transfer water tank 22 for heat dissipation, the other stream flows to the battery 16 and the warm air core 12 for dehumidification of the battery 16 and the warm air core 12, and finally the two streams of heat transfer medium flow back to the second water pump 11 at the same time to complete circulation.

Reactive heat dissipation working condition:

as shown in fig. 4, the first water pump 8, the heat exchange water tank 22, the battery 16, the motor 21 and the second evaporation passage form a reactive heat dissipation loop;

compressor module stop work under this operating mode, 11 stop work of second water pump, in first water pump 8 sent heat transfer medium into radiator tank, heat transfer medium can realize the cooling, and heat transfer medium after the cooling can flow through battery 16 and motor 21 and cool down the two, gets back to first water pump 8 after the cooling is accomplished and accomplishes the circulation.

Comfort defrosting mode:

as shown in fig. 5, the second water pump 11, the second condensing passage and the heat exchange water tank 22 form a defrosting circuit;

the compressor module starts under this work, but first water pump 8 is out of work, only has the work of second water pump 11, and second water pump 11 sends heat transfer medium into in the second condensation route and carries out the heat transfer with the refrigerant in the first condensation route and realize rising temperature, then changes the frosting to changing hot-water tank 22 in the hot-water tank 22, because first water pump 8 is out of work, changes the frosting in-process and can not have cold air entering passenger cabin.

It should be additionally noted that the dual secondary circuit thermal management system of the embodiment further includes a valve assembly, and the valve assembly is used for switching on and off of the first refrigeration circuit, the second refrigeration circuit, the first heating circuit, the second heating circuit, the first dehumidification circuit, the second dehumidification circuit, the reactive heat dissipation circuit, and the defrosting circuit. The valve assembly can realize the back-and-forth switching of the double-secondary-circuit thermal management system in the five working conditions, and the specific type of the valve assembly can be selected according to actual needs.

To sum up, the double-secondary-loop heat management system of the embodiment has a refrigeration working condition, a heating working condition, a dehumidification working condition, a reactive heat dissipation working condition and a comfortable defrosting mode, and can meet the heat management requirements of the battery 16, the motor 21, passengers and dehumidification defrosting. Under the refrigeration working condition, the motor 21 and the battery 16 can be cooled, the phenomenon that the motor 21 and the battery 16 are overheated is avoided, and under the refrigeration working condition, the heat of the motor 21 is utilized to heat a heat exchange medium, so that the compressor can still well heat at a lower temperature, and the energy consumption of the compressor 1 can be reduced. Under the dehumidification working condition, the battery 16 in the passenger compartment and the warm air core 12 can be dehumidified, and the phenomenon of condensed water drops of the battery 16 and the warm air core 12 is avoided. Under the idle heat dissipation operating mode, even if the compressor module does not work, battery 16 and motor 21 still can cool down, like this at the intermediate temperature state (need not under the temperature state of refrigeration and heating in the car), still can guarantee battery 16 and motor 21's steady operation. Under the working condition of comfortable defrosting, cold air cannot be blown into the passenger compartment, and the comfort level is improved.

Specifically, the valve assembly comprises a first three-way proportional valve 9, and three openings of the first three-way proportional valve 9 are respectively connected with a water outlet of the first water pump 8, a liquid inlet of the heat exchange water tank 22 and an inlet of the main heat exchanger 13. From this, through controlling first tee bend proportional valve 9, just can control the break-make of first refrigeration circuit, first heating circuit, first dehumidification return circuit and idle heat dissipation return circuit, compare the technical scheme who sets up four control valves on four return circuits, adopt a structure of first tee bend proportional valve 9 simpler, pipeline layout is also simpler. Of course, in other embodiments of the present invention, the control function of the first three-way proportional valve 9 may also be realized by providing a plurality of one-way control valves.

Specifically, the valve assembly includes a second three-way proportional valve 10, and three openings of the second three-way proportional valve 10 are respectively connected to the water inlet of the second water pump 11, the liquid inlet of the heat exchange water tank 22, and the inlet of the warm air core 12. From this, through controlling second tee bend proportional valve 10, just can control the break-make of second refrigeration circuit, second heating circuit, second dehumidification return circuit and defrosting return circuit, compare the technical scheme that sets up four control valves on four return circuits, adopt a second tee bend proportional valve 10's structure simpler, the piping arrangement is also simpler. Of course, in other embodiments of the present invention, the control function of the second three-way proportional valve 10 may also be realized by providing a plurality of one-way control valves.

Specifically, the valve assembly includes a third three-way proportional valve 14, and three openings of the third three-way proportional valve 14 are respectively connected to a heat exchange outlet of the main heat exchanger 13, a heat exchange inlet of the battery 16, and a heat exchange inlet of the motor 21. It can be understood that the third three-way proportional valve 14 can control the on-off of the pipes among the battery 16, the main heat exchanger 13 and the motor 21, so as to realize the switching among the first refrigeration loop, the first dehumidification loop and the reactive heat dissipation loop. Of course, in other embodiments of the present invention, the control function of the third three-way proportional valve 14 may also be realized by providing a plurality of one-way control valves.

Specifically, the valve assembly includes a fourth three-way proportional valve 15, a first opening of the fourth three-way proportional valve 15 is connected to a heat exchange inlet of the battery 16, a second opening of the third three-way proportional valve 14 connected to the heat exchange inlet of the battery 16 is connected to a heat exchange outlet of the warm air core 12, and a third opening of the third three-way proportional valve is connected to a heat exchange inlet of the motor 21, a liquid outlet of the heat radiation water tank 22, and a second condensation path of the condenser 3.

It can be understood that the fourth three-way proportional valve 15 can control the on-off of the pipes among the battery 16, the warm air core 12 and the motor 21, so as to realize the switching among the first refrigeration loop, the first dehumidification loop and the reactive heat dissipation loop. And the fourth three-way proportional valve 15 can also realize whether to heat the battery 16 under the working condition of heating, whether to dehumidify the battery 16 under the working condition of dehumidification. Compared with the technical scheme of adopting three control valves, the structure of adopting the fourth three-way proportional valve 15 is simpler, and the pipeline arrangement is also simpler. Of course, in other embodiments of the present invention, the control function of the fourth three-way proportional valve 15 may also be realized by providing a plurality of one-way control valves.

More specifically, the valve assembly comprises a fifth three-way proportional valve 17, a first opening of the fifth three-way proportional valve 17 is connected to the second condensation path, a second opening is connected to a heat exchange outlet of the motor 21, and a third opening is connected to a heat exchange inlet of the motor 21 and an opening of the fourth three-way proportional valve 15 connected to the heat exchange inlet of the motor 21. It can be understood that the fifth three-way proportional valve 17 can control the passage of the pipes between the battery 16, the motor 21 and the condenser 3, so as to realize the switching among the first refrigeration loop, the first dehumidification loop and the reactive heat dissipation loop, and compared with the technical scheme of adopting three control valves, the structure of adopting one fifth three-way proportional valve 17 is simpler, and the pipeline arrangement is also simpler. Of course, in other embodiments of the present invention, the control function of the fifth three-way proportional valve 17 may also be realized by providing a plurality of one-way control valves.

Further, the valve assembly comprises a sixth three-way proportional valve 18, and three openings of the sixth three-way proportional valve 18 are respectively connected with the second condensation path, the liquid outlet of the heat exchange water tank 22 and an opening of a fifth three-way proportional valve 17 connected with the second condensation path. It can be understood that the sixth three-way proportional valve 18 can control the passage of the pipes between the fifth three-way proportional valve 17, the heat exchange water tank 22 and the condenser 3, so as to realize the switching of the second refrigeration circuit, the second heating circuit, the second dehumidification circuit and the defrosting circuit. In addition, the sixth three-way proportional valve 18 can also control the flow direction proportion of the refrigerant flowing to the condenser 3 and the heat exchange water tank 22 in the dehumidification state, thereby better performing the dehumidification function. Compared with the technical scheme of adopting four control valves, the structure of adopting one sixth three-way proportional valve 18 is simpler, and the pipeline arrangement is simpler. Of course, in other embodiments of the present invention, the control function of the sixth three-way proportional valve 18 may also be realized by providing a plurality of one-way control valves.

Furthermore, the valve assembly comprises a seventh three-way proportional valve 19, and three openings of the seventh three-way proportional valve 19 are respectively connected with the heat exchange inlet of the motor 21, the liquid outlet of the heat exchange water tank 22, and the opening of a sixth three-way proportional valve 18 connected with the liquid outlet of the heat exchange water tank 22. It can be understood that the seventh three-way proportional valve 19 can control the on-off of the pipelines among the motor 21, the heat exchange water tank 22 and the sixth three-way proportional valve 18, so as to realize the switching of the second refrigeration loop, the second heating loop, the second dehumidification loop, the defrosting loop and the reactive heat dissipation loop. Compared with the technical scheme of adopting five control valves, the structure of adopting one seventh three-way proportional valve 19 is simpler, and the pipeline arrangement is simpler. Of course, in other embodiments of the present invention, the control function of the seventh three-way proportional valve 19 may also be realized by providing a plurality of one-way control valves.

Further, the first opening of the eighth three-way proportional valve 20 is connected to the heat exchange inlet of the motor 21, the second opening is connected to the opening of the seventh three-way proportional valve 19 connected to the heat exchange inlet of the motor 21 and the opening of the fifth three-way proportional valve 17 connected to the heat exchange inlet of the motor 21, and the third opening is connected to the opening of the fourth three-way proportional valve 15 connected to the heat exchange inlet of the motor 21.

It can be understood that the eighth three-way proportional valve can control the on-off of the pipelines among the motor 21, the seventh three-way proportional valve 19 and the third three-way proportional valve 14, so as to realize the switching of the first refrigeration loop, the first heating loop, the first dehumidification loop and the reactive heat dissipation loop. Of course, in other embodiments of the present invention, the control function of the eighth three-way proportional valve 20 may also be realized by providing a plurality of one-way control valves.

Optionally, the refrigerant in the compressor module is R290 refrigerant (propane refrigerant). Of course, in other embodiments of the present invention, the refrigerant may be selected according to actual needs.

The utility model also discloses an electric vehicle which comprises the double-secondary-loop thermal management system. The electric vehicle has the double-secondary-loop thermal management system, so that the electric vehicle has long driving mileage under all weather conditions.

In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. A bi-secondary loop thermal management system, comprising:

the compressor module comprises a compressor (1), a condenser (3), an expansion valve (5) and an evaporator (6) which are connected in sequence;

the recooling device (2) is provided with a first recooling passage and a second recooling passage, two ends of the first recooling passage are respectively connected with the compressor (1) and a first condensing passage of the condenser (3), and an outlet of the second recooling passage is connected with a main heat exchanger (13) of the electric vehicle;

the heat regenerator (7) is provided with a first heat recovery passage and a second heat recovery passage, two ends of the first heat recovery passage are respectively connected with the first condensation passage and the expansion valve (5), and two ends of the second heat recovery passage are respectively connected with the first evaporation passages of the compressor (1) and the evaporator (6);

a first water pump (8), the main heat exchanger (13), a battery (16) of the electric vehicle, a motor (21) of the electric vehicle and a second evaporation passage of the evaporator (6) forming a first refrigeration circuit; the first water pump (8), the heat exchange water tank (22) of the electric vehicle, the motor (21) and the second evaporation passage form a first heating loop; the first water pump (8), the main heat exchanger (13), the motor (21) and the second evaporation passage form a first dehumidification loop; the first water pump (8), the heat exchange water tank (22), the battery (16), the motor (21) and the second evaporation passage form a reactive heat dissipation loop;

a second water pump (11), wherein the second water pump (11), a second condensation path of the condenser (3) and the heat exchange water tank (22) form a second refrigeration loop, and the second water pump (11), the second condensation path, the battery (16) and a warm air core (12) of the electric vehicle form a second heating loop; the second water pump (11), the second condensation passage and the heat exchange water tank (22) or the second water pump (11), the second condensation passage, the battery (16) and the warm air core body (12) form a second dehumidification loop; the second water pump (11), the second condensation passage and the heat exchange water tank (22) form a defrosting loop;

and the valve assembly is used for switching the connection and disconnection of the first refrigeration loop, the second refrigeration loop, the first heating loop, the second heating loop, the first dehumidification loop, the second dehumidification loop, the reactive heat dissipation loop and the defrosting loop.

2. The dual secondary loop thermal management system of claim 1, wherein the valve assembly comprises a first three-way proportional valve (9), and three openings of the first three-way proportional valve (9) are respectively connected with a water outlet of the first water pump (8), a liquid inlet of the heat exchange water tank (22) and an inlet of the main heat exchanger (13).

3. The dual secondary loop thermal management system of claim 1, wherein the valve assembly comprises a second three-way proportional valve (10), and three openings of the second three-way proportional valve (10) are respectively connected to a water inlet of the second water pump (11), a liquid inlet of the heat exchange water tank (22), and an inlet of the warm air core (12).

4. The dual secondary loop thermal management system of claim 1, wherein the valve assembly comprises a third three-way proportional valve (14), three openings of the third three-way proportional valve (14) being connected to a heat exchange outlet of the main heat exchanger (13), a heat exchange inlet of the battery (16) and a heat exchange inlet of the electric motor (21), respectively.

5. The dual secondary loop thermal management system of claim 4, wherein the valve assembly further comprises a fourth three-way proportional valve (15), a first opening of the fourth three-way proportional valve (15) is connected to a heat exchange inlet of the battery (16), a second opening of the third three-way proportional valve (14) connected to the heat exchange inlet of the battery (16) is connected to a heat exchange outlet of the warm air core (12), and a third opening of the third three-way proportional valve is connected to a heat exchange inlet of the motor (21), a liquid outlet of the heat exchange water tank (22), and the second condensation path of the condenser (3).

6. The dual secondary loop thermal management system of claim 5, wherein the valve assembly further comprises a fifth three-way proportional valve (17), a first opening of the fifth three-way proportional valve (17) being connected to the second condensation path, a second opening being connected to a heat exchange outlet of the electric motor (21), and a third opening being connected to a heat exchange inlet of the electric motor (21) and to an opening of the fourth three-way proportional valve (15) connected to the heat exchange inlet of the electric motor (21).

7. The dual secondary loop thermal management system of claim 6, wherein the valve assembly further comprises a sixth three-way proportional valve (18), three openings of the sixth three-way proportional valve (18) being connected to the second condensation path, the liquid outlet of the heat exchange water tank (22), and the opening of the fifth three-way proportional valve (17) connected to the second condensation path, respectively.

8. The dual secondary loop thermal management system of claim 7, wherein the valve assembly further comprises:

a seventh three-way proportional valve (19), three openings of the seventh three-way proportional valve (19) are respectively connected with a heat exchange inlet of the motor (21), a liquid outlet of the heat exchange water tank (22), and an opening of the sixth three-way proportional valve (18) connected with the liquid outlet of the heat exchange water tank (22);

the heat exchanger comprises an eighth three-way proportional valve (20), wherein a first opening of the eighth three-way proportional valve (20) is connected with a heat exchange inlet of a motor (21), a second opening of the eighth three-way proportional valve is connected with an opening of a seventh three-way proportional valve (19) connected with the heat exchange inlet of the motor (21) and an opening of a fifth three-way proportional valve (17) connected with the heat exchange inlet of the motor (21), and a third opening of the eighth three-way proportional valve is connected with an opening of a fourth three-way proportional valve (15) connected with the heat exchange inlet of the motor (21).

9. The dual secondary loop thermal management system of any of claims 1-8, wherein the refrigerant within the compressor module is R290 refrigerant.

10. An electric vehicle comprising a dual secondary loop thermal management system as claimed in any one of claims 1 to 9.

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