WO2021122949A1 - Multipass cooling valve and cooling system of electric vehicle - Google Patents

Multipass cooling valve and cooling system of electric vehicle Download PDF

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Publication number
WO2021122949A1
WO2021122949A1 PCT/EP2020/086708 EP2020086708W WO2021122949A1 WO 2021122949 A1 WO2021122949 A1 WO 2021122949A1 EP 2020086708 W EP2020086708 W EP 2020086708W WO 2021122949 A1 WO2021122949 A1 WO 2021122949A1
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WO
WIPO (PCT)
Prior art keywords
valve body
passages
cooling
battery
joints
Prior art date
Application number
PCT/EP2020/086708
Other languages
French (fr)
Inventor
Dongsheng CHEN
Original Assignee
HELLA GmbH & Co. KGaA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201911319013.4A external-priority patent/CN110843465A/en
Priority claimed from CN201922302474.2U external-priority patent/CN211567601U/en
Application filed by HELLA GmbH & Co. KGaA filed Critical HELLA GmbH & Co. KGaA
Publication of WO2021122949A1 publication Critical patent/WO2021122949A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
    • F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
    • F16K11/0853—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug having all the connecting conduits situated in a single plane perpendicular to the axis of the plug
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
    • B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
    • B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/072—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members
    • F16K11/076—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with sealing faces shaped as surfaces of solids of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H2001/00307—Component temperature regulation using a liquid flow

Abstract

The present invention discloses a multipass cooling valve and a cooling system of an electric vehicle, wherein the multipass cooling valve comprises a valve body (5) with an upper layer (51) and a lower layer (52), and a housing fitted on the outer periphery of the valve body. The upper layer of the valve body has a plurality of upper passages while the lower layer thereof has a plurality of lower passages, wherein the upper passages and the lower passages are provided in a staggered pattern. The valve body and an actuator of a vehicle are fitted fixedly together, and when the actuator rotates, the valve body is rotated synchronously. The housing is provided with a plurality of joints for communicating with the valve body at intervals, the height of which joints is higher than or equal to the distance between the top surface of the upper passages and the bottom surface of the lower passages of the valve body. The present invention is of a simple construction, able to simplify the connection of the circulation cooling modules of an electric vehicle, allows for full performance of cooling systems, and increases the mileage of the vehicle.

Description

MULTIPASS COOLING VALVE AND COOLING SYSTEM OF ELECTRIC
VEHICLE
TECHNICAL FIELD
[0001] The present invention relates to the technical field of automobile accessories, and particularly, to a multipass cooling valve and a cooling system of an electric vehicle using the same.
BACKGROUND
[0002] With the rapid development of science and technology, people tend to pursue a higher and higher quality of life. As automobiles have become an essential mode of transportation in daily travel, people become more and more fastidious about the comfort, safety, economy, and environmental protection of vehicles.
[0003] With the continuous consumption of petroleum energy reserves and the exacerbated environmental pollution, electric vehicles as a mode of transportation with diversified energy sources and less pollution emissions, are bound to become the mainstream of automobile development in the near future, and have a great tendency to replace traditional fuel vehicles.
[0004] In new energy vehicles, there are many electronic control components that need liquid cooling to ensure the normal operation thereof. At present, it is an effective way of solving the problem of thermal management of power drive systems to match with the cooling systems thereof. Heat exchange between heat exchangers, water jackets, cooling liquid and heating elements carries away waste heat produced therein, so as to ensure that the corresponding components work in an appropriate temperature range.
[0005] The cooling system of pure electric vehicle, compared with that of traditional vehicles, should take the cooling of both motors and batteries into consideration, thereby having a more complicated structure. The cooling system of an existing pure electric vehicle usually has three heat exchangers, which are a medium-temperature radiator for cooling an electric motor system, a cooler for cooling power batteries and a heat exchanger for cooling an air conditioning system, respectively. The three heat exchangers constitute a front-end cooling module, and need to be connected by a plurality of three-way valves or four-way valves, thereby presenting a relatively complicated structure and relatively large associated heat damage, which is harmful to the operation performance of the cooling system. Hence, how to reasonably simplify the structure design of the cooling system while ensuring the performance thereof, is one of the critical problems in the development of pure electric vehicles.
SUMMARY
[0006] The objective of the present invention is to overcome the deficiency of the technology thereof, and to provide a multipass cooling valve, which is of a simple construction, able to simplify the connection of the circulation cooling modules of an electric vehicle, and allows for full performance of cooling systems; and a cooling system of an electric vehicle.
[0007] To achieve the above-mentioned objective, the present invention takes the following technical solution:
[0008] A multipass cooling valve, comprising:
[0009] a valve body, which is cylindrical, and divided into an upper layer with a plurality of upper passages and a lower layer with a plurality of lower passages, wherein the upper passages and the lower passages are provided in a staggered pattern, the valve body and an actuator of a vehicle are fitted fixedly together, and when the actuator rotates, the valve body is rotated synchronously by the drive of the actuator; and
[0010] a housing, which is fitted on the outer periphery of the valve body, and provided with a plurality of joints for communicating with the valve body at intervals, the height of the joints is higher than or equal to the distance between the top surface of the upper passages and the bottom surface of the lower passages of the valve body.
[0011] Furthermore, the quantities of the upper passages and the lower passages are three, respectively. [0012] Furthermore, the three upper passages are any one or any combination of arc-shaped grooves passing through the side wall of the valve body or arc-shaped passages with openings at both ends; the three lower passages are any one or any combination of arc-shaped grooves passing through the side wall of the valve body or arc-shaped passages with openings at both ends.
[0013] A cooling system of an electric vehicle, comprising: a drive system, an air-conditioning-system circuit, a power battery-system cooling circuit, and a cooling valve for switching among the drive system, the air-conditioning-system circuit, and the power battery-system cooling circuit, the cooling valve comprises a valve body and a housing, wherein the valve body is cylindrical, and divided into an upper layer with three upper passages and a lower layer with three lower passages, in which the upper passages and the lower passages are provided in a staggered pattern, the valve body and an actuator of the vehicle is fitted fixedly together, and when the actuator rotates, the valve body is rotated synchronously by the drive of the actuator; the housing is fitted on the outer periphery of the valve body, and provided with at least six joints for communicating with the valve body at intervals, the joints are connected correspondingly to liquid inlets and outlets of the drive system, the air-conditioning-system circuit, and the power battery-system cooling circuit, and the height of the joints is higher than or equal to the distance between the top surface of the upper passages and the bottom surface of the lower passages of the valve body, such that the communication, cutting and switching among the drive system, the air-conditioning-system circuit and the battery-system cooling circuit in the electric vehicle can be controlled through the connection between the corresponding joints on the housing and the upper passages or the lower passages of the valve body.
[0014] Furthermore, the three upper passages are any one or any combination of arc-shaped grooves passing through the side wall of the valve body or arc-shaped passages with openings at both ends; the three lower passages are any one or any combination of arc-shaped grooves passing through the side wall of the valve body or arc-shaped passages with openings at both ends.
[0015] Furthermore, the drive system comprises a first water pump, an electric drive motor and a radiator connected in series via pipelines; the air-conditioning-system circuit comprises a second water pump, a heating element and a heat exchanger connected in series via pipelines; the battery-system cooling circuit comprises a third water pump, a battery and a cooler connected in series via pipelines; the pipelines contain cooling liquid.
[0016] Furthermore, the housing of the cooling valve is provided with six joints A, B, C, D, E, and F, wherein the joints A and B are respectively connected to the first water pump and the radiator of the drive system via pipelines, the joints C and D are respectively connected to the second water pump and the heat exchanger of the air-conditioning-system circuit via pipelines, and the joint E and F are respectively connected to the third water pump and the cooler of the battery-system cooling circuit via pipelines.
[0017] Furthermore, the housing of the cooling valve is provided with seven joints
A, B, C, D, E, F, G, wherein the first water pump of the drive system is connected to joint A of the housing, the electric drive motor is connected to the first water pump, and between the electric drive motor and the radiator, there is provided with a three-way joint, which is connected to the electric drive motor, the radiator and the joint C, the radiator being connected to the joint B; the third water pump of the battery-system cooling circuit is connected to the joint D, the battery is connected to the third water pump, and between the battery and the cooler, there is provided with a three-way joint, which is connected to the battery, a three-way valve and the cooler respectively, the three-way valve being connected to the joint E; the second water pump of the air-conditioning-system circuit is connected to the joint F, the heating element is connected to the second water pump, and the heat exchanger is connected to the joint G.
[0018] Furthermore, the housing of the cooling valve is provided with eight joints A,
B, C, D, E, F, G, H, wherein the first water pump of the drive system is connected to joint A of the housing, the electric drive motor is connected to the first water pump, and between the electric drive motor and the radiator, there is provided with a three-way joint, which is connected to the electric drive motor, the radiator and the joint B, the radiator being connected to the joint C; the third water pump of the battery-system cooling circuit is connected to the joint D, the battery is connected to the third water pump, and between the battery and the cooler, there is provided with a three-way joint, which is connected to the battery, the joint E and the cooler respectively, the cooler being connected to the joint F; the second water pump of the air-conditioning-system circuit is connected to the joint G, the heating element is connected to the second water pump, and the heat exchanger is connected to the joint H.
[0019] With the above-mentioned construction, the multipass cooling valve of the present invention, upon connecting to the cooling system of the electric vehicle, is able to switch among the drive system, the air-conditioning-system circuit, the power battery-system cooling circuit. The switching among the circulation loops is implemented by controlling the flow direction of the cooling liquid. The multipass cooling valve of the present invention simplifies the construction of the cooling system of the electric vehicle. The three different circuits, i.e., the drive system, the air-conditioning-system circuit, the power battery-system cooling circuit can be connected by one multipass cooling valve, instead of a plurality of control valves for respectively controlling each circuits in the existing construction, therefore the whole construction of the cooling system is optimized, which not only deducts the cost of a plurality of control valves, but also saves the installation space, simplifies the installation procedure, reduces the arranged pipelines, and facilitates the installation of the whole cooling system. Especially, that one multipass cooling valve is employed for directly taking place of a plurality of control valves, can reduce the power output, save energy, and promote the mileage of the vehicle, and at the same time, the drive system, the air-conditioning-system circuit, and the power battery-system cooling circuit are connected together such that the heat produced by the electric drive motor and the battery is utilizing for heating the interior of the vehicle, can further save energy, improve cooling or heating effciency, thereby improving the performance of cooling or heating. The improvement of the performance means that the power consumption of working components is reduced, and the energy efficiency of the electric vehicle is significantly improved, thereby increasing the mileage of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a stereogram of a valve body of a first embodiment according to the present invention.
[0021] Figure 2 is a schematic view of sectional structure of an upper layer of the valve body of the first embodiment according to the present invention.
[0022] Figure 3 is a schematic view of sectional structure of an lower layer of the valve body of the first embodiment according to the present invention
[0023] Figure 4 is a sectional view of the upper layer in a first usage state of the valve body of the first embodiment according to the present invention.
[0024] Figure 5 is a sectional view of the lower layer in the first usage state of the valve body of the first embodiment according to the present invention.
[0025] Figure 6 is a schematic view of a first state of the connection between the cooling system of the vehicle and the first embodiment according to the present invention.
[0026] Figure 7 is a sectional view of the upper layer in a second usage state of the valve body of the first embodiment according to the present invention.
[0027] Figure 8 is a sectional view of the lower layer in the second usage state of the valve body of the first embodiment according to the present invention.
[0028] Figure 9 is a schematic view of a second state of the connection between the cooling system of the vehicle and the first embodiment according to the present invention.
[0029] Figure 10 is a sectional view of the upper layer in a third usage state of the valve body of the first embodiment according to the present invention.
[0030] Figure 11 is a sectional view of the lower layer in the third usage state of the valve body of the first embodiment according to the present invention. [0031] Figure 12 is a schematic view of a third state of the connection between the cooling system of the vehicle and the first embodiment according to the present invention.
[0032] Figure 13 is a sectional view of the upper layer in a fourth usage state of the valve body of the first embodiment according to the present invention.
[0033] Figure 14 is a sectional view of the lower layer in the fourth usage state of the valve body of the first embodiment according to the present invention.
[0034] Figure 15 is a schematic view of a fourth state of the connection between the cooling system of the vehicle and the first embodiment according to the present invention.
[0035] Figure 16 is a sectional view of the upper layer in a fifth usage state of the valve body of the first embodiment according to the present invention.
[0036] Figure 17 is a sectional view of the lower layer in the fifth usage state of the valve body of the first embodiment according to the present invention.
[0037] Figure 18 is a schematic view of a fifth state of the connection between the cooling system of the vehicle and the first embodiment according to the present invention.
[0038] Figure 19 is a sectional view of the upper layer in a sixth usage state of the valve body of the first embodiment according to the present invention.
[0039] Figure 20 is a sectional view of the lower layer in the sixth usage state of the valve body of the first embodiment according to the present invention.
[0040] Figure 21 is a schematic view of a sixth state of the connection between the cooling system of the vehicle and the first embodiment according to the present invention.
[0041] Figure 22 is a sectional view of the upper layer in a seventh usage state of the valve body of the first embodiment according to the present invention. [0042] Figure 23 is a sectional view of the lower layer in the seventh usage state of the valve body of the first embodiment according to the present invention.
[0043] Figure 24 is a schematic view of a seventh state of the connection between the cooling system of the vehicle and the first embodiment according to the present invention.
[0044] Figure 25 is a stereogram of the combination of a valve body and a housing of a second embodiment according to the present invention.
[0045] Figure 26 is a side view of the combination of a valve body and a housing of a second embodiment according to the present invention.
[0046] Figure 27 is a schematic view of sectional structure of an upper layer of the valve body of the second embodiment according to the present invention.
[0047] Figure 28 is a schematic view of sectional structure of an lower layer of the valve body of the second embodiment according to the present invention
[0048] Figure 29 is a sectional view of the upper layer in a first usage state of the valve body of the second embodiment according to the present invention.
[0049] Figure 30 is a sectional view of the lower layer in the first usage state of the valve body of the second embodiment according to the present invention.
[0050] Figure 31 is a schematic view of a first state of the connection between the cooling system of the vehicle and the second embodiment according to the present invention.
[0051] Figure 32 is a sectional view of the upper layer in a second usage state of the valve body of the second embodiment according to the present invention.
[0052] Figure 33 is a sectional view of the lower layer in the second usage state of the valve body of the second embodiment according to the present invention.
[0053] Figure 34 is a schematic view of a second state of the connection between the cooling system of the vehicle and the second embodiment according to the present invention. [0054] Figure 35 is a sectional view of the upper layer in a third usage state of the valve body of the second embodiment according to the present invention.
[0055] Figure 36 is a sectional view of the lower layer in the third usage state of the valve body of the second embodiment according to the present invention.
[0056] Figure 37 is a schematic view of a third state of the connection between the cooling system of the vehicle and the second embodiment according to the present invention.
[0057] Figure 38 is a sectional view of the upper layer in a fourth usage state of the valve body of the second embodiment according to the present invention.
[0058] Figure 39 is a sectional view of the lower layer in the fourth usage state of the valve body of the second embodiment according to the present invention.
[0059] Figure 40 is a schematic view of a fourth state of the connection between the cooling system of the vehicle and the second embodiment according to the present invention.
[0060] Figure 41 is a sectional view of the upper layer in a fifth usage state of the valve body of the second embodiment according to the present invention.
[0061] Figure 42 is a sectional view of the lower layer in the fifth usage state of the valve body of the second embodiment according to the present invention.
[0062] Figure 43 is a schematic view of a fifth state of the connection between the cooling system of the vehicle and the second embodiment according to the present invention.
[0063] Figure 44 is a sectional view of the upper layer in a sixth usage state of the valve body of the second embodiment according to the present invention.
[0064] Figure 45 is a sectional view of the lower layer in the sixth usage state of the valve body of the second embodiment according to the present invention. [0065] Figure 46 is a schematic view of a sixth state of the connection between the cooling system of the vehicle and the second embodiment according to the present invention.
[0066] Figure 47 is a sectional view of the upper layer in a seventh usage state of the valve body of the second embodiment according to the present invention.
[0067] Figure 48 is a sectional view of the lower layer in the seventh usage state of the valve body of the second embodiment according to the present invention.
[0068] Figure 49 is a schematic view of a seventh state of the connection between the cooling system of the vehicle and the second embodiment according to the present invention.
[0069] Figure 50 is a sectional view of the upper layer in a eighth usage state of the valve body of the second embodiment according to the present invention.
[0070] Figure 51 is a sectional view of the lower layer in the eighth usage state of the valve body of the second embodiment according to the present invention.
[0071] Figure 52 is a schematic view of a eighth state of the connection between the cooling system of the vehicle and the second embodiment according to the present invention.
DETAILED DESCRIPTION
[0072] hereinafter a detailed description of the present invention will be given in conjunction with specific embodiments, so as to further explain the technical solution of the present invention.
[0073] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "interior", "outer", "exterior", etc., indicate orientational or positional relationships based on that shown in the accompanying drawings. They are employed only for describing the present invention conveniently and simply, instead of indicating or implying that the described device or element must be located, configured or operated in a specific orientation, therefore, they should not be understood as a limitation to the present invention. Within the description of the present invention, unless otherwise specified, "a plurality of" means two or more.
[0074] The present invention discloses a multipass cooling valve for a cooling system of an electric vehicle, which includes a cylindrical valve body and a housing fitted on the bottom surface and the outer periphery of the valve body. The valve body is divided into an upper layer with three upper passages and a lower layer with three lower passages, wherein the upper passages and the lower passages are provided in a staggered pattern. The valve body is fitted fixedly with an actuator of the automobile, and when the actuator rotates, it can drive the valve body to rotate synchronously. The housing is sleeved on the outer periphery of the valve body, and provided with at least six joints at intervals for communicating the valve body. At least six of the joints are connected correspondingly to liquid inlets and outlets of a drive system, an air-conditioning-system circuit, and a battery-system cooling circuit in the automobile cooling system. The height of the joints is greater than or equal to the distance between the top surface of the upper passages and the bottom surface of the lower passages of the valve body, such that when the valve body is rotated, the communication, cutting and switching among the three circuits, i.e., the drive system, the air-conditioning-system circuit and the battery-system cooling circuit in the electric vehicle, can be controlled through the connection between the corresponding joints on the housing and the upper passages or the lower passages of the valve body.
[0075] As can be shown in Figure 3, Figure 6, Figure 9, Figure 12, Figure 15, Figure 18, Figure 21 , Figure 24, Figure 31 , Figure 34, Figure 37, Figure 40, Figure 43, Figure 46, Figure 49 and Figure 52, the cooling system of the electric vehicle includes a drive system 10, an air-conditioning-system circuit 20, and a battery-system cooling circuit 30. The drive system 10 can include a first water pump 11 , an electric drive motor 12, and a radiator 13 connected in series via a pipeline A. The air-conditioning-system circuit 20 can include a second water pump 21 , a heating element 22, and a heat exchanger 23 connected in series via a pipeline B. The battery-system cooling circuit 30 can include a third water pump 31 , a battery 32, and a cooler 33 connected in series via a pipeline C. The pipelines A, B, and C contain cooling liquid.
[0076] As shown in Figure 1 to Figure 24, it is a first embodiment of a multipass cooling valve 40 of the present invention, which includes a cylindrical valve body 5 and a housing 6 fitted on the bottom surface and the outer periphery of the valve body 5. The top end of the valve body 5 is fitted fixedly with an actuator of the vehicle (electrically or manually). The valve body 5 is divided into an upper layer 51 with three upper passages 5A, 5B, 5C, and a lower layer 52 with three lower passages 5D, 5E, 5F, wherein the three upper passages 5A, 5B, 5C of the upper layer and the three lower passages 5D, 5E, 5F of the lower layer 52 are provided in a staggered pattern. The top end of the valve body 5 is fitted fixedly together with an actuator (not shown in the figures) of the vehicle. The housing 6 is sleeved on the bottom end and the outer periphery of the valve body 5, and in this embodiment,
Figure imgf000013_0001
at intervals with seven joints 6A, 6B, 6C, 6D, 6E, 6F, 6G for communication with the valve body 5.
[0077] The first water pump 11 of the drive system 10 is connected to the joint 6A of the housing 6, and the electric drive motor 12 is connected to the first water pump 11 . Between the electric drive motor 12 and the radiator 13, there is provided with a three-way joint 14 which is connected to the electric drive motor 12, the radiator 13 and the joint 6C. The radiator 13 is connected to the joint 6B. The third water pump 31 of the battery-system cooling circuit 30 is connected to the joint 6D, and the battery 32 is connected to the third water pump 31 . Between the battery 32 and the cooler 33, there is provided with a three-way joint 34 which is respectively connected to the battery 32, a three-way valve 35 and the cooler 33. The three-way valve 35 is connected to the joint 6E. The second water pump 21 of the air-conditioning-system circuit 20 is connected to the joint 6F, the heating element 22 is connected to the second water pump 21 , and the heat exchanger 23 is connected to the joint 6G. The height of the joints 6A, 6B, 6C, 6D, 6E, 6F, 6G is greater than or equal to the distance between the top surface of the upper passages and the bottom surface of the lower passages of the valve body 5, such that when the valve body 5 rotates, the communication, cutting and switching among the cooling systems can be controlled through the connection between the corresponding joints on the housing and the upper passages (5A, 5B, 5C) or the lower passages (5D, 5E, 5F) of the valve body 5.
[0078] Figures 4 to 24 are views of the cooling valve 40 and the three circulation loops, i.e., the drive system 10, the air-conditioning-system circuit 20, and the battery-system cooling circuit 30 in different usage states in the first embodiment of the present invention, in which the thick solid lines indicate a heating state, the two-dot chain lines indicate a cooling state, and the thin solid lines and the dotted lines indicate a disconnected state. Depending on the states of the vehicle, the same element in different states may be a heat-absorbing element or a heat-dissipating element. For instance, when an electric vehicle has not been started for a long time, the electric drive motor 12 thereof is cool, thereby assuming a heat-absorbing state currently, while the electric drive motor 12 assumes a heat-dissipating state when it operates.
[0079] As shown in Figures 4 to 6, when the actuator drives the valve body 5 to rotate to a first state, all the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 4 are open, wherein the upper passage 5A is communicated with the joints 6A and 6B, that is, the upper passage 5A is communicated with the drive system 10; the upper passage 5B is communicated with the joints 6G and 6F, that is, the upper passage 5B is communicated with the air-conditioning-system circuit 20; and the upper passage 5C is communicated with the joints 6D and 6E, that is, the upper passage 5C is communicated with the battery-system cooling circuit 30. The three lower passages 5D, 5E, and 5F of the lower layer 52 are closed, as shown in FIG. 5. At this time, as shown in FIG.6, the drive system 10, the air-conditioning-system circuit 20 and the battery-system cooling circuit 30 form three independent circulation loops that do not affect each other, each of which can be individually controlled according to specific requirements.
[0080] As shown in Figures 7 to 9, when the actuator drives the valve body 5 to rotate to a second state, all the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 7 are also open, and at this time, the upper passage 5A is communicated with the joints 6C and 6D, that is, the upper passage 5A is communicated with the drive system 10 and the battery-system cooling circuit 30; the upper passage 5B is communicated with the joints 6A and 6G, that is, the upper passage 5B is communicated with the drive system 10 and the air-conditioning-system circuit 20; the upper passage 5C is communicated with the joints 6E and 6F, that is, the upper passage 5C is communicated with the battery-system cooling circuit 30 and the air-conditioning-system circuit 20. As shown in FIG. 8, the three lower passages 5D, 5E, and 5F of the lower layer 52 are closed. At this time, as shown in FIG. 9, the drive system 10, the air-conditioning-system circuit 20, and the battery-system cooling circuit 30 form a series loop with independent circulation, whereby the waste heat of the electric drive motor 12 and the battery 32 can be utilized for heating the interior of the vehicle.
[0081] As shown in Figures 10 to 12, when the actuator drives the valve body 5 to rotate to a third state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 10 are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 11 are open, wherein the lower passage 5D is communicated with the joints 6D and 6E, the low passage 5E is communicated with the joints 6C and 6F, and the lower passage 5F is communicated with the joints 6A and 6G. At this time, as shown in Figure 12, the lower passage 5D is communicated individually with the battery-system cooling circuit 30, forming an individual circulation loop of the battery-system cooling circuit, while the lower passages 5E and 5F are communicated with the drive system 10 and the air-conditioning-system circuit 20, making the drive system 10 and the air-conditioning-system circuit 20 in series to form a circulation loop, whereby the waste heat of electric motor can be utilized for heating the interior of the vehicle.
[0082] As shown in Figures 13 to 15, when the actuator drives the valve body 5 to rotate to a fourth state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 13 are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 14 are open, wherein the lower passage 5D is communicated with the joints 6C and 6D, the low passage 5E is communicated with the joints 6A and 6E, and the lower passage 5F is communicated with the joints 6G and 6F. At this time, as shown in Figure 15, the lower passages 5D and 5E makes the drive system 10 and the battery-system cooling circuit 30 in series to form a circulation loop, whereby the waste heat of electric motor can be utilized for heating the battery; while the lower passage 5F enables the air-conditioning-system circuit 20 to form an individual circulation loop.
[0083] As shown in Figures 16 to 18, when the actuator drives the valve body 5 to rotate to a fifth state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 16 are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 17 are open, wherein the lower passage 5D is communicated with the joints 6B and 6D, the low passage 5E is communicated with the joints 6A and 6E, and the lower passage 5F is communicated with the joints 6G and 6F. At this time, as shown in Figure 18, the lower passages 5D and 5E makes the drive system 10 and the battery-system cooling circuit 30 in series to form a circulation loop, therefore a radiator can be utilized for cooling the electric drive motor 12 and the battery 32; while the lower passage 5F enables the air-conditioning-system circuit 20 to form an individual circulation loop.
[0084] As shown in Figures 19 to 21 , when the actuator drives the valve body 5 to rotate to a sixth state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 19 are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 20 are open, wherein the lower passage 5D is communicated with the joints 6B and 6D, the low passage 5E is communicated with the joints 6A and 6E, and the lower passage 5F is communicated with the joints 6G and 6F. At this time, as shown in Figure 21 , the lower passages 5D and 5E makes the drive system 10 and the battery-system cooling circuit 30 in series to form a circulation loop, therefore the radiator and the cooler 33 can be utilized for cooling the electric drive motor 12 and the battery 32; while the lower passage 5F enables the air-conditioning-system circuit 20 to form an individual circulation loop.
[0085] As shown in Figures 22 to 24, when the actuator drives the valve body 5 to rotate to a seventh state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 12 are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 23 are open, wherein the lower passage 5D is communicated with the joints 6A and 6C, the low passage 5E is communicated with the joints 6G and 6D, and the lower passage 5F is communicated with the joints 6E and 6F. At this time, as shown in Figure 24, the lower passage 5D is connected to the drive system 10 to form an individual circulation loop, while the lower passages 5E and 5F makes the air-conditioning-system circuit 20 and the battery-system cooling circuit 30 in series to form a circulation loop, such that a heating element 23 can be utilized for heating the battery 32.
[0086] As shown in Figure 25 to Figure 52, it is a second embodiment of a multipass cooling valve 40 of the present invention, which includes a cylindrical valve body 5 and a housing 6 fitted on the bottom surface and outer periphery of the valve body 5. The top end of the valve body 5 is fitted fixedly with an actuator of the vehicle (electrically or manually). The valve body 5 is divided into an upper layer 51 with three upper passages 5A, 5B, 5C, and a lower layer 52 with three lower passages 5D, 5E, 5F, wherein the three upper passages 5A, 5B, 5C of the upper layer and the three lower passages 5D, 5E, 5F of the lower layer 52 are provided in a staggered pattern. The top end of the valve body 5 is fitted fixedly with an actuator (not shown in the figure) of the vehicle. The housing 6 is sleeved on the bottom end and the outer periphery of the valve body 5, and in this embodiment, is provided at intervals with eight joints 6A, 6B, 6C, 6D, 6E, 6F, 6G, 6H for communication with the valve body 5.
[0087] The first water pump 11 of the drive system 10 is connected to the joint 6A of the housing 6, and the electric drive motor 12 is connected to the first water pump 11 . Between the electric drive motor 12 and the radiator 13, there is provided with a three-way joint 14 which is connected to the electric drive motor 12, the radiator 13 and the joint 6B. The radiator 13 is connected to the joint 6C. The third water pump 31 of the battery-system cooling circuit 30 is connected to the joint 6D, and the battery 32 is connected to the third electric motor 31 . Between the battery 32 and the cooler 33, there is provided with a three-way joint 34 which is respectively connected to the battery 32, the joint 6E, and the cooler 33. The cooler 33 is connected to the joint 6F. The second water pump 21 of the air-conditioning-system circuit 20 is connected to the joint 6G, the heating element 22 is connected to the second water pump 21 , and the heat exchanger 23 is connected to the joint 6H. The height of the joints 6A, 6B, 6C, 6D, 6E, 6F, 6G, 6H, is greater than or equal to the distance between the top surface of the upper passages and the bottom surface of the lower passages of the valve body 5, such that when the valve body 5 rotates, the communication, cutting and switching among the cooling systems can be controlled through the connection between the corresponding joints on the housing 6 and the upper passages or the lower passages of the valve body 5.
[0088] Figures 29 to 52 are views of the cooling valve 40 and the three circulation loops, i.e., the drive system 10, the air-conditioning system circuit 20, and the battery-system cooling circuit 30 in different usage states in the second embodiment, in which the thick solid lines indicate a heating state, the two-dot chain lines indicate a cooling state, and the thin solid lines and the dotted lines indicate a disconnected state. Depending on different states of the vehicle, the same element in different states may be a heat-absorbing element or a heat-dissipating element. For instance, when an electric vehicle has not been started for a long time, the electric drive motor 12 thereof is cool, thereby assuming a heat-absorbing state currently, while the electric drive motor 12 assumes a heat-dissipating state when it operates.
[0089] As shown in Figures 29 to 31 , when the actuator drives the valve body 5 to rotate to a first state, all the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 29 are open, wherein the upper passage 5A is communicated with the joints 6A and 6C, that is, the upper passage 5A is communicated with the drive system 10; the upper passage 5B is communicated with the joints 6D and 6E, that is, the upper passage 5B is communicated with the third water pump 31 and the battery 32 of the battery-system cooling circuit 30, so as to heat the battery 32; and the upper passage 5C is communicated with the joints 6G and 6H, that is, the upper passage 5C is communicated with the air-conditioning-system circuit 20. The three lower passages 5D, 5E, and 5F of the lower layer 52 are closed, as shown in FIG. 30. At this time, as shown in FIG.31 , the drive system 10, the air-conditioning-system circuit 20 and the battery-system cooling circuit 30 form three independent circulation loops that do not affect each other, each of which can be individually controlled according to specific requirements.
[0090] As shown in Figures 32 to 34, when the actuator drives the valve body 5 to rotate to a second state, all the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 32 are open, wherein the upper passage 5A is communicated with the joints 6A and 6C, that is, the upper passage 5A is communicated with the drive system 10; the upper passage 5B is communicated with the joints 6D and 6F, that is, the upper passage 5B is communicated with the cooler 33 and the third pump 31 of the battery-system cooling circuit 30, such that the cooler 33 can be utilized for cooling the battery 32; the upper passage 5C is communicated with the joints 6G and 6H, that is, the upper passage 5C is communicated with the air-conditioning-system circuit 20. As shown in FIG. 33, the three lower passages 5D, 5E, and 5F of the lower layer 52 are closed. At this time, as shown in FIG. 34, the drive system 10, the air-conditioning-system circuit 20, and the battery-system cooling circuit 30 form three independent circulation loops that do not affect each other, each of which can be individually controlled according to specific requirements. 6B
[0091] As shown in Figures 35 to 37, when the actuator drives the valve body 5 to rotate to a third state, all the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 35 are also open, and at this time, the upper passage 5A is communicated with the joints 6B and 6D, that is, the upper passage 5A is communicated with the drive system 10 and the battery-system cooling circuit 30; the upper passage 5B is communicated with the joints 6E and 6G, that is, the upper passage 5B is communicated with the drive system 10 and the air-conditioning-system circuit 20; the upper passage 5C is communicated with the joints 6H and 6A, that is, the upper passage 5C is communicated with the battery-system cooling circuit 30 and the air-conditioning-system circuit 20. As shown in FIG. 36, the three lower passages 5D, 5E, and 5F of the lower layer 52 are closed. At this time, as shown in FIG. 37, the drive system 10, the air-conditioning-system circuit 20, and the battery-system cooling circuit 30 form a series loop with independent circulation, whereby the waste heat of the electric drive motor 12 and the battery 32 can be utilized for heating the interior of the vehicle.
[0092] As shown in Figures 38 to 40, when the actuator drives the valve body 5 to rotate to a fourth state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5, as shown in Figure 38, are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 39 are open, wherein the lower passage 5D is communicated with the joints 6D and 6E, that is, the lower passage 5D is the battery 32 and the third pump 31 of the battery-system cooling circuit 30, whereby the battery 32 can be heated; the low passage 5E is communicated with the joints 6B and 6G, and the lower passage 5F is communicated with the joints 6A and 6H. At this time, as shown in Figure 40, the lower passage 5D is communicated individually with the battery-system cooling circuit 30, forming an individual circulation loop of the battery-system cooling circuit 30 so as to heat the battery 32, while the lower passages 5E and 5F are communicated with the drive system 10 and the air-conditioning-system circuit 20, making the drive system 10 and the air-conditioning-system circuit 20 in series to form a circulation loop, whereby the waste heat of electric motor can be utilized for heating the interior of the vehicle.
[0093] As shown in Figures 41 to 43, when the actuator drives the valve body 5 to rotate to a fifth state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 41 are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 42 are open, wherein the lower passage 5D is communicated with the joints 6B and 6D, the low passage 5E is communicated with the joints 6A and 6E, and the lower passage 5F is communicated with the joints 6G and 6H. At this time, as shown in Figure 43, the lower passages 5D and 5E makes the drive system 10 and the battery-system cooling circuit 30 in series to form a circulation loop, whereby the waste heat of the electric drive motor 12 can be utilized for heating the battery 32; while the lower passage 5F enables the air-conditioning-system circuit 20 to form an individual circulation loop.
[0094] As shown in Figures 44 to 46, when the actuator drives the valve body 5 to rotate to a sixth state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 44 are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 45 are open, wherein the lower passage 5D is communicated with the joints 6C and 6D, the low passage 5E is communicated with the joints 6A and 6E, and the lower passage 5F is communicated with the joints 6G and 6H. At this time, as shown in Figure 46, the lower passages 5D and 5E makes the drive system 10 and the battery-system cooling circuit 30 in series to form a circulation loop, whereby a radiator can be utilized for cooling the electric drive motor 12 and the battery 32; while the lower passage 5F enables the air-conditioning-system circuit 20 to form an individual circulation loop.
[0095] As shown in Figures 47 to 49, when the actuator drives the valve body 5 to rotate to a seventh state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 47 are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 48 are open, wherein the lower passage 5D is communicated with the joints 6C and 6D, the low passage 5E is communicated with the joints 6A and 6F, and the lower passage 5F is communicated with the joints 6G and 6H. At this time, as shown in Figure 49, the lower passages 5D and 5E makes the drive system 10 and the battery-system cooling circuit 30 in series to form a circulation loop, whereby a radiator and a cooler 33 can be utilized for cooling the electric drive motor 12 and the battery 32, while the lower passage 5F enables the air-conditioning-system circuit 20 to form an individual circulation loop.
[0096] As shown in Figures 50 to 52, when the actuator drives the valve body 5 to rotate to a eighth state, the three upper passages 5A, 5B, and 5C of the upper layer 51 of the valve body 5 as shown in Figure 50 are closed, while all the three lower passages 5D, 5E, and 5F of the lower layer 52 as shown in Figure 51 are open, wherein the lower passage 5D is communicated with the joints 6E and 6G, the low passage 5E is communicated with the joints 6D and 6H, and the lower passage 5F is communicated with the joints 6A and 6B. At this time, as shown in Figure 52, the lower passage 5F is connected to the drive system 10 to form an individual circulation loop, while the lower passages 5D and 5E makes the air-conditioning-system circuit 20 and the battery-system cooling circuit 30 in series to form a circulation loop, such that a heating element 23 can be utilized for heating the battery 32.
[0097] The main distinction between the first embodiment and the second embodiment lies in that the quantities of the joints on the housing 6 thereof are different. The eight joints of the second embodiment enables the switching among the different work modes of the three circulation loops, and especially, in the battery-system cooling circuit 30, opening corresponding joints enables the battery to communicate with the joints, or the cooler to communicate with the joints, so as to heat or cool the battery; while in the first embodiment, an external three-way valve 35 is needed, through the switching of which the joints are communicated with the battery 32 and the cooler 33, so as to heat or cool the battery.
[0098] In the present invention, the multipass cooling valve 40, upon connecting to the cooling system of the electric vehicle, is able to switch among the drive system 10, the air-conditioning-system circuit 20, the power battery-system cooling circuit 30. The switching among the circulation loops is implemented by controlling the flow direction of the cooling liquid. The multipass cooling valve of the present invention simplifies the construction of the cooling system of the electric vehicle. The three loops, i.e., the drive system 10, the air-conditioning-system circuit 20, the power battery-system cooling circuit 30 can be connected by one multipass cooling valve 40, instead of a plurality of control valves for respectively controlling the loops in the current construction, therefore the whole construction of the cooling system is optimized, which not only reduces the cost of a plurality of control valves, but also saves the installation space, simplifies the installation procedure, reduces the arranged pipelines, and facilitates the installation of the whole cooling system. Especially, that one multipass cooling valve 40 is employed for directly taking place a plurality control valve, can reduce the power output, and save energy, and at the same time, that the drive system 10, the air-conditioning-system circuit 20, the power battery-system cooling circuit 30 are connected together such that the heat produced by the electric drive motor and the battery is utilized for heating the interior of the vehicle, can further save energy, accelerate cooling or heating, thereby improving the performance of cooling or heating. The improvement of the performance means that the power consumption of components is reduced, and the energy efficiency of the electric vehicle is significantly improved, thereby increasing the range of the whole vehicle indirectly.
[0099] The aforementioned embodiments and drawings are not limited to the product form or pattern of the present invention, and any appropriate changes or modifications made by those skilled in the art should be regarded as not departing from the patent scope of the present invention.

Claims

What is claimed is:
1 . A multipass cooling valve, wherein it comprises a valve body, which is cylindrical, and divided into an upper layer with a plurality of upper passages and a lower layer with a plurality of lower passages, wherein the upper passages and the lower passages are provided in a staggered pattern, the valve body and an actuator of a vehicle is fitted fixedly together, and when the actuator rotates, the valve body is rotated synchronously by the drive of the actuator; and a housing, which is fitted on the outer periphery of the valve body, and provided with a plurality of joints for communicating with the valve body at intervals, the height of the joints is higher than or equal to the distance between the top surface of the upper passages and the bottom surface of the lower passages of the valve body.
2. The multipass cooling valve according to Claim 1 , wherein the quantities of the upper passages and the lower passages of the valve body are three, respectively.
3. The multipass cooling valve according to Claim 2, wherein the three upper passages are any one or any combination of arc-shaped grooves passing through the side wall of the valve body or arc-shaped passages with openings at both ends; the three lower passages are any one or any combination of arc-shaped grooves passing through the side wall of the valve body or arc-shaped passages with openings at both ends.
4. A cooling system of an electric vehicle, wherein it comprises a drive system, an air-conditioning-system circuit, a power-battery-system cooling circuit, and a cooling valve for switching among the drive system, the air-conditioning-system circuit, and the power-battery-system cooling circuit, which valve comprises a valve body and a housing, wherein the valve body is cylindrical, and divided into an upper layer with three upper passages and a lower layer with three lower passages, in which the upper passages and the lower passages are provided in a staggered pattern, the valve body and an actuator of the vehicle is fitted fixedly together, and when the actuator rotates, the valve body is rotated synchronously; the housing is fitted on the outer periphery of the valve body, and provided with at least six joints for communicating with the valve body at intervals, which joints are connected correspondingly to liquid inlets and outlets of the drive system, the air-conditioning-system circuit, and the battery-system cooling circuit, and the height of which joints is higher than or equal to the distance between the top surface of the upper passages and the bottom surface of the lower passages of the valve body, such that the communication, cutting and switching among the drive system, the air-conditioning-system circuit and the battery-system cooling circuit in the electric vehicle can be controlled through the connection between corresponding joints on the housing and the upper passages or the lower passages of the valve body.
5. The multipass cooling valve according to Claim 4, wherein the three upper passages of the valve body are any one or any combination of arc-shaped grooves passing through the side wall of the valve body or arc-shaped passages with openings at both ends; the three lower passages are any one or any combination of arc-shaped grooves passing through the side wall of the valve body or arc-shaped passages with openings at both ends.
6. The multipass cooling valve according to Claim 4 or 5, wherein the drive system comprises a first water pump, an electric drive motor and a radiator connected in series via pipelines; the air-conditioning-system circuit comprises a second water pump, a heating element and a heat exchanger connected in series via pipelines; the battery-system cooling circuit comprises a third water pump, a battery and a cooler connected in series via pipelines; and the pipelines contain cooling liquid.
7. The multipass cooling valve according to Claim 6, wherein the housing of the cooling valve is provided with six joints A, B, C, D, E, and F, in which the joints A and B are respectively connected to the first water pump and the radiator of the drive system via pipelines, the joints C and D are respectively connected to the second water pump and the heat exchanger of the air-conditioning-system circuit via pipelines, and the joints E and F are respectively connected to the third water pump and the cooler of the battery-system cooling circuit via pipelines..
8. The multipass cooling valve according to Claim 6, wherein the housing of the cooling valve is provided with seven joints A, B, C, D, E, F, G, in which the first water pump of the drive system is connected to the joint A of the housing, the electric drive motor is connected to the first water pump, and between the electric drive motor and the radiator, there is provided with a three-way joint, which is connected to the electric drive motor, the radiator and the joint C, the radiator being connected to the joint B; the third water pump of the battery-system cooling circuit is connected to the joint D, the battery is connected to the third water pump, and between the battery and the cooler, there is provided with a three-way joint, which is connected to the battery, a three-way valve and the cooler respectively, the three-way valve being connected to the joint E; the second water pump of the air-conditioning-system circuit is connected to the joint F, the heating element is connected to the second water pump, and the heat exchanger is connected to the joint G.
9. The multipass cooling valve according to Claim 6, wherein the housing of the cooling valve is provided with eight joints A, B, C, D, E, F, G, H, in which the first water pump of the drive system is connected to joint A of the housing, the electric drive motor is connected to the first water pump, and between the electric drive motor and the radiator, there is provided with a three-way joint, which is connected to the electric drive motor, the radiator and the joint B, the radiator being connected to the joint C; the third water pump of the battery-system cooling circuit is connected to the joint D, the battery is connected to the third water pump, and between the battery and the cooler, there is provided with a three-way joint, which is connected to the battery, the joint E and the cooler respectively, the cooler being connected to the joint F; the second water pump of the air-conditioning-system circuit is connected to the joint G, the heating element is connected to the second water pump, and the heat exchanger is connected to the joint H.
PCT/EP2020/086708 2019-12-19 2020-12-17 Multipass cooling valve and cooling system of electric vehicle WO2021122949A1 (en)

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CN201911319013.4A CN110843465A (en) 2019-12-19 2019-12-19 Multichannel cooling valve and electric automobile cooling system
CN201922302474.2U CN211567601U (en) 2019-12-19 2019-12-19 Multichannel cooling valve and electric automobile cooling system
CN201922302474.2 2019-12-19
CN201911319013.4 2019-12-19

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