WO2022185561A1

WO2022185561A1 - Temperature regulation device

Info

Publication number: WO2022185561A1
Application number: PCT/JP2021/025626
Authority: WO
Inventors: 弘明別處; 慶介福永; 太郎雨貝
Original assignee: 日本電産株式会社
Priority date: 2021-03-03
Filing date: 2021-07-07
Publication date: 2022-09-09
Also published as: CN116547855A

Abstract

A temperature regulation device according to one embodiment of the present invention comprises: a heat medium circuit through which a heat medium flows; a motor which drives a vehicle; a battery which supplies electric power to the motor; and a chiller which draws heat from the heat medium. The heat medium circuit has: a first loop which allows circulation of the heat medium by passing through the motor and the chiller; a second loop which allows circulation of the heat medium by passing through the battery; a third loop which allows circulation of the heat medium by passing through the motor, the battery, and the chiller; a first switching part which is disposed between the first loop and the second loop; and a bypass passage that enables detour around the chiller. The first switching part enables switching between a first mode for separating the first loop and the second loop, and a second mode for connecting the first loop and the second loop to form the third loop. The bypass passage is provided with a valve that is capable of regulating the proportion of the flow rate of the heat medium passing through the chiller and the flow rate of the heat medium passing through the bypass passage.

Description

Temperature controller

The present invention relates to a temperature control device.
This application claims priority from 63/155,829 filed March 3, 2021 in the United States, the contents of which are hereby incorporated by reference.

An electric vehicle or hybrid vehicle is equipped with a cooling circuit that cools the motor, battery, etc. Patent Literature 1 discloses an in-vehicle heat exchange system that utilizes waste heat recovered from a motor and a battery for an in-vehicle temperature control device.

U.S. Patent No. 10183544

In the heat exchange system of the prior art, a chiller that recovers waste heat from the battery and a chiller that recovers waste heat from the motor are provided. That is, the conventional cooling circuit has a chiller for the battery and a chiller for the motor.

One of the objectives of one aspect of the present invention is to provide a temperature control device that can be manufactured at low cost by suppressing the number of chillers.

One aspect of the temperature control device of the present invention includes a heat medium circuit through which a heat medium flows, a motor that drives a vehicle, a battery that supplies power to the motor, and a chiller that removes heat from the heat medium. . The heat medium circuit includes a first loop that passes through the motor and the chiller to circulate the heat medium, a second loop that passes through the battery to circulate the heat medium, the motor, the battery, and a third loop that passes through the chiller to circulate the heat medium; a first switching unit that is arranged between the first loop and the second loop; and a detour that can bypass the chiller. have. The first switching unit selects between a first mode in which the first loop and the second loop are separated, and a second mode in which the first loop and the second loop are connected to form the third loop. Switchable. The detour is provided with a valve capable of adjusting the ratio between the flow rate of the heat medium passing through the chiller and the flow rate of the heat medium passing through the detour.

According to one aspect of the present invention, there is provided a temperature control device that can be manufactured at low cost by suppressing the number of chillers.

FIG. 1 is a schematic diagram of a temperature control device of one embodiment. FIG. 2 is a schematic diagram of the first mode of the heat transfer medium circuit of one embodiment. FIG. 3 is a schematic diagram of the second mode of the heat transfer medium circuit of one embodiment. FIG. 4 is a schematic diagram of a third mode of the thermal medium circuit of one embodiment.

A temperature control device according to an embodiment of the present invention will be described below with reference to the drawings. Note that, in the drawings below, in order to make each configuration easier to understand, the actual structure and the scale and number of each structure may be different.

FIG. 1 is a schematic diagram of a temperature control device 1 of one embodiment.
The temperature control device 1 is mounted in a vehicle 90 such as an electric vehicle (EV), a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHV), or the like, which uses a motor as a power source.

The temperature control device 1 includes a motor 2, a power control device 4, an inverter 3, a radiator 5, a battery 6, a chiller 7, a heat medium circuit 10, an air conditioner 50, and a controller 60. . A heat medium flows through the heat medium circuit 10 .

The motor 2 is a motor-generator that has both a function as an electric motor and a function as a generator. The motor 2 is connected to wheels of the vehicle 90 via a speed reduction mechanism (not shown). The motor 2 is driven by alternating current supplied from the inverter 3 to rotate the wheels. Thereby, the motor 2 drives the vehicle 90 . Also, the motor 2 regenerates the rotation of the wheels to generate alternating current. The generated electric power is stored in the battery 6 through the inverter 3 . Oil is stored in the housing of the motor 2 for cooling and lubricating each part of the motor.

The inverter 3 converts the direct current of the battery 6 into alternating current. Inverter 3 is electrically connected to motor 2 . The AC current converted by the inverter 3 is supplied to the motor 2 . That is, the inverter 3 converts the DC current supplied from the battery 6 into AC current and supplies the AC current to the motor 2 .

The power control device 4 is also called an IPS (Integrated Power System). The power control device 4 has an AC/DC conversion circuit and a DC/DC conversion circuit. The AC/DC conversion circuit converts an alternating current supplied from an external power source into a direct current and supplies the direct current to the battery 6 . That is, the power control device 4 converts alternating current supplied from the external power supply into direct current in the AC/DC conversion circuit and supplies the direct current to the battery 6 . The DC/DC conversion circuit converts the DC current supplied from the battery 6 into DC currents of different voltages, and supplies the DC currents to the control unit 60 that switches the switching unit 30 .

The battery 6 supplies power to the motor 2 via the inverter 3 . Also, the battery 6 is charged with electric power generated by the motor 2 . Battery 6 may be charged by an external power source. Battery 6 is, for example, a lithium ion battery. The battery 6 may be of other forms as long as it is a secondary battery that can be repeatedly charged and discharged.

The chiller 7 takes heat from the heat medium flowing through the heat medium circuit 10 . The chiller 7 is connected to an air conditioning heat medium circuit 51 that passes through the air conditioner 50 . The chiller 7 is a heat exchanger that exchanges heat between the heat medium in the heat medium circuit 10 and the heat medium in the heat medium circuit 51 for air conditioning.

The air conditioner 50 adjusts the temperature of the living space of the vehicle 90. The air conditioner 50 receives heat from the heat medium in the heat medium circuit 10 via the heat medium circuit 51 for air conditioning and the chiller 7 and uses the heat to adjust the temperature of the living space of the vehicle 90 . The heat medium circuit 51 for air conditioning is a circuit independent of the heat medium circuit 10, and a heat medium different from that in the heat medium circuit 10 flows.

The radiator 5 has a fan and releases the heat of the heat medium to the outside air to cool the heat medium. That is, the radiator 5 is an exchanger that exchanges heat with the outside air.

The control unit 60 uses power supplied from the battery 6 to control each unit of the temperature control device 1 . The controller 60 is connected to thermometers for measuring temperatures of the motor 2, the inverter 3, the power control device 4, and the battery 6, respectively. The control unit 60 controls the radiator 5, the switching unit 30 of the heat medium circuit 10, the first pump 41, and the second pump 42 based on the measurement result of the thermometer.

The heat medium circuit 10 has multiple pipe lines 29 , multiple switching units 30 , a first pump 41 , a second pump 42 , and an adjustment valve (valve) 39 .

A plurality of pipelines 29 are connected to each other to form a loop (circulation path) through which the heat medium flows.
In the following description, when distinguishing the plurality of pipelines 29 from each other, these are referred to as the first pipeline 11, the second pipeline 12, the third pipeline 13, the fourth pipeline 14, the fifth pipeline 15, and the eighth pipeline. They are referred to as conduit 18, ninth conduit 19, tenth conduit 20, and eleventh conduit 21, respectively.

The first pump 41 and the second pump 42 are arranged in different conduits 29, respectively. The first pump 41 and the second pump 42 unidirectionally pressure-feed the heat medium in the arranged pipe line 29 . In this embodiment, a first pump 41 is arranged in the first line 11 and a second pump 42 is arranged in the second line 12 .

The switching unit 30 is connected to the control unit 60 and switches between opening and closing to switch the pipeline 29 through which the heat medium passes. The switching unit 30 is arranged at a portion where three or more conduits 29 join, and allows any two of the plurality of connected conduits 29 to communicate with each other. The switching unit 30 can selectively switch which channel 29 to close.

In the following description, when the plurality of switching units 30 are distinguished from each other, they are called a first switching unit (four-way valve) 31, a second switching unit 32, a third switching unit 33, and a fourth switching unit 34.

The first switching section 31 is a four-way valve. The first switching unit 31 has four connection ports A, B, C, and D. The first switching unit 31 allows two sets of two connection ports among the four connection ports A, B, C, and D to communicate with each other. The connection port A is connected to the ninth pipeline 19 . The connection port C is connected to the eighth pipeline 18 . Both ends of the second pipeline 12 are connected to the connection ports B and D, respectively.

The first switching unit 31 can switch between two connection states (first connection state and second connection state). The first switching unit 31 causes the connection ports A and C and the connection ports B and D to communicate with each other in the first connection state (for example, FIG. 2). The first switching unit 31 in the first connection state allows both ends of the second pipeline 12 to communicate with each other while allowing the eighth pipeline 18 and the ninth pipeline 19 to communicate with each other. The first switching unit 31 causes the connection ports A and B and the connection ports C and D to communicate with each other in the first connection state (for example, FIG. 3). The first switching portion 31 in the second connection state allows the eighth conduit 18 and one end of the second conduit 12 to communicate with each other and allows the ninth conduit 19 and the other end of the second conduit 12 to communicate with each other.

According to this embodiment, a four-way valve is employed as the first switching unit 31. As a result, the pipe configuration of the heat medium circuit 10 can be simplified, and the space of the heat medium circuit 10 can be saved. Further, by using a four-way valve for a part of the switching sections 30 among the plurality of switching sections 30, the number of the switching sections 30 can be reduced. As a result, the number of objects controlled by the control unit 60 can be reduced, and the number of components such as wiring between the switching unit 30 and the control unit 60 can be reduced. Such an effect can be obtained when at least one of the plurality of switching units 30 is a four-way valve.

The second switching unit 32 is composed of a plurality of

valves

32a, 32b and a plurality of

pipelines

32c, 32d. More specifically, the second switching unit 32 has a first valve (three-way valve) 32a, a second valve (two-way valve) 32b, a first connecting pipe line 32c, and a second connecting pipe line 32d.

The second switching section 32 functions as the switching section 30 that switches the pipe line to be connected by operating a plurality of

valves

32a and 32b. A four-way valve may be employed instead of the second switching section 32 . Since a four-way valve is generally expensive, by adopting the configuration of the present embodiment as the second switching unit 32, the heat medium circuit can be configured at low cost.

The first connecting pipeline 32c includes a connecting portion of the first pipeline 11 and the sixth pipeline (first section) 16, a connecting portion of the ninth pipeline 19 and the seventh pipeline (second section) 17, extends across the In addition, the second connecting pipeline 32 d extends across between the connecting portion of the fifth pipeline 15 and the sixth pipeline 16 and the connecting portion of the eighth pipeline 18 and the seventh pipeline 17 . The first connecting pipeline 32c and the second connecting pipeline 32d connect a fourth loop L4 and a fifth loop L5, which will be described later (see FIG. 4).

The first valve 32a is a three-way valve. The first valve 32 a is arranged at the connecting portion of the first connecting line 32 c , the ninth line 19 and the seventh line 17 . The first valve 32 a allows one of the first connecting pipeline 32 c and the seventh pipeline 17 to communicate with the ninth pipeline 19 . Thereby, the first valve 32 a causes the heat medium flowing through the ninth pipeline 19 to flow to either the first connecting pipeline 32 c or the seventh pipeline 17 .

The second valve 32b is a two-way valve. A second valve 32 b is arranged in the path of the sixth conduit 16 . The second valve 32b can switch between an open state in which the heat medium flows through the sixth conduit 16 and a closed state in which the flow of the heat medium is stopped. The second valve 32b of this embodiment is a solenoid valve controlled by the controller 60 .

The third switching section 33 is a three-way valve. The third switching portion 33 is arranged at the connecting portion of the first pipeline 11 , the third pipeline 13 , and the fourth pipeline 14 . The third switching unit 33 allows one of the third pipeline 13 and the fourth pipeline 14 to communicate with the first pipeline 11 . Thereby, the third switching unit 33 causes the heat medium flowing through the first pipeline 11 to flow to either the third pipeline 13 or the fourth pipeline 14 .

The fourth switching section 34 is a three-way valve. The fourth switching section 34 is arranged in the path of the first pipeline 11 . An end portion of the eleventh pipeline 21 is connected to the fourth switching portion 34 . That is, the fourth switching portion 34 is arranged at the connecting portion between the first pipeline 11 and the eleventh pipeline 21 . The fourth switching unit 34 closes the eleventh pipe line 21 to allow the heat medium to pass through the first pipe line 11, or closes the upstream side of the first pipe line 11 to switch the heat medium from the eleventh pipe line 21 to the first pipe. The downstream side of the pipe 11 is connected and the heat medium is passed through the 11th pipe 21 .

The adjustment valve 39 is a mixing valve that adjusts the flow rate of the heat medium flowing out in two directions on the downstream side. A regulating valve 39 is arranged in the path of the ninth conduit 19 . Also, the end of the tenth pipeline 20 is connected to the adjustment valve 39 . That is, the adjustment valve 39 is arranged at the connecting portion between the ninth pipeline 19 and the tenth pipeline 20 . The adjustment valve 39 is connected to the control unit 60, and adjusts the ratio of the flow rate of the heat medium flowing downstream of the ninth pipeline 19 and the flow rate of the heat medium flowing through the tenth pipeline 20 according to a signal from the control unit 60. Adjustable.

The configuration of each conduit 29 will be specifically described below. In the description of each pipeline 29, "one end" and "the other end" of the pipeline 29 simply indicate either end of the pipeline 29. Therefore, it does not necessarily indicate the flow direction of the heat transfer medium.

One end of the first pipeline 11 is connected to the sixth pipeline 16 and the first connecting pipeline 32c. The other end of first pipeline 11 is connected to third pipeline 13 and fourth pipeline 14 . The first line 11 passes through the first pump 41 , the power controller 4 , the inverter 3 and the motor 2 . The first pump 41 pressure-feeds the heat medium from one end side toward the other end side in the first pipeline 11 .

One end of the second conduit 12 is connected to the connection port D of the first switching section 31 . The other end of the second conduit 12 is connected to the connection port B of the first switching section 31 . The second line 12 passes through the second pump 42 and the battery 6 . The second pump 42 pumps the heat medium from one end side toward the other end side in the second pipeline 12 .

One end of the third pipeline 13 is connected to the first pipeline 11 and the fourth pipeline 14 via the third switching section 33 . The other end of the third pipeline 13 is connected to the fourth pipeline 14 and the fifth pipeline 15 . A third conduit 13 passes through the radiator 5 . The heat medium passing through the third pipeline 13 is cooled by the radiator 5 .

One end of the fourth pipeline 14 is connected to the first pipeline 11 and the third pipeline 13 via the third switching section 33 . The other end of fourth pipeline 14 is connected to third pipeline 13 and fifth pipeline 15 . That is, the fourth conduit 14 is connected to both ends of the third conduit 13 . One of the third pipeline 13 and the fourth pipeline 14 bypasses the other.

One end of the fifth pipeline 15 is connected to the third pipeline 13 and the fourth pipeline 14 . The other end of the fifth pipeline 15 is connected to the sixth pipeline 16 and the second connecting pipeline 32d.

One end of the sixth pipeline 16 is connected to the fifth pipeline 15 and the second connecting pipeline 32d. The other end of the sixth pipeline 16 is connected to the first pipeline 11 and the first connecting pipeline 32c.

One end of the seventh pipeline 17 is connected to the ninth pipeline 19 and the first connecting pipeline 32c. The other end of the seventh pipeline 17 is connected to the eighth pipeline 18 and the second connecting pipeline 32d.

One end of the eighth pipeline 18 is connected to the seventh pipeline 17 and the second connecting pipeline 32d. The other end of the eighth conduit 18 is connected to the connection port C of the first switching section 31 .

One end of the ninth conduit 19 is connected to the connection port A of the first switching section 31 . The other end of the ninth pipeline 19 is connected to the seventh pipeline 17 and the first connecting pipeline 32c via the first valve 32a. A ninth line 19 passes through the chiller 7 . The heat medium passing through the ninth pipeline 19 is cooled by the chiller 7 .

The tenth pipeline (detour) 20 is connected to the ninth pipeline 19 . The tenth pipeline 20 can bypass the chiller 7 . The upstream end of the tenth pipeline 20 branches off from the ninth pipeline 19 via a regulating valve 39 on the upstream side of the chiller 7 (that is, between the first switching unit 31 and the chiller 7). The downstream end of the tenth pipeline 20 joins the ninth pipeline 19 downstream of the chiller 7 (that is, between the chiller 7 and the first valve 32a).

The eleventh pipeline 21 is connected to the first pipeline 11 . The eleventh pipeline 21 can bypass the motor 2 . The upstream end of the eleventh pipeline 21 branches off from the first pipeline 11 on the upstream side of the motor 2 (that is, between the inverter 3 and the motor 2). Further, the downstream end of the eleventh pipeline 21 is connected to the first pipeline 11 via the fourth switching section 34 on the downstream side of the motor 2 (that is, between the motor 2 and the third switching section 33). merge.

(For each mode of the heat medium circuit)
The heat medium circuit 10 of the present embodiment has a first mode, a second mode, and a third mode that are transitioned by switching of the switching section 30 .

FIG. 2 is a schematic diagram of the heat medium circuit 10 in the first mode. FIG. 3 is a schematic diagram of the heat carrier circuit 10 in the second mode. FIG. 4 is a schematic diagram of the heat carrier circuit 10 in the third mode.

The heat medium circuit 10 in each mode includes loops (first loop L1, first sub-loop L1a, second loop L2, third loop L3, third sub-loop L3a, fourth loop L4) in which the heat medium flows and circulates in one direction. , a fourth sub-loop L4a, and a fifth loop L5). Therefore, the heat medium circuit 10 has a first loop L1, a first sub-loop L1a, a second loop L2, a third loop L3, a third sub-loop L3a, a fourth loop L4, a fourth sub-loop L4a, and a fifth loop L5. .

(first mode)
As shown in FIG. 2, the heat medium circuit 10 in the first mode has a first loop L1 and a second loop L2.
The first loop L1 includes a first pipeline 11, a fourth pipeline 14, a fifth pipeline 15, a second connecting pipeline 32d, an eighth pipeline 18, a ninth pipeline 19, and a first connecting pipeline 32c. are connected in a loop to circulate the heat medium. The second loop L2 connects both ends of the second pipeline 12 in a loop shape and circulates the heat medium.

The heat medium circuit 10 is set to the first mode by switching the switching unit 30 as follows. That is, the first switching unit 31 allows the eighth conduit 18 and the ninth conduit 19 to communicate with each other, and allows both ends of the second conduit 12 to communicate with each other. The second switching unit 32 connects the ninth pipeline 19, the first connecting pipeline 32c, and the first pipeline 11, and connects the fifth pipeline 15, the second connecting pipeline 32d, and the eighth pipeline 18. communicate. The third switching unit 33 connects the first pipeline 11 and the fourth pipeline 14 and closes the third pipeline 13 . The fourth switching unit 34 closes the eleventh pipeline 21 and opens the first pipeline 11 .

The first loop L1 passes through the first pump 41, power controller 4, inverter 3, motor 2, and chiller 7 to circulate the heat medium. In the first loop L1, the heat medium is pumped by the first pump 41 counterclockwise in the figure. The heat medium pressure-fed by the first pump 41 passes through each part of the first loop L1 in the order of the power control device 4, the inverter 3, the motor 2, and the chiller 7.

In the first loop L1, heat from the motor 2, the inverter 3, and the power control device 4 moves to the heat medium. Furthermore, this heat is recovered by the chiller 7 and utilized in the air conditioner 50 . Thereby, the heat generated from the motor 2, the inverter 3, and the power control device 4 can be recovered by the chiller 7 in the first loop L1. That is, motor 2 , inverter 3 , and power control device 4 are cooled by chiller 7 .

In the first mode, the first sub-loop L1a can be configured by switching the path passed through the first loop L1 from the fourth pipeline 14 to the third pipeline 13. That is, the first mode has a first loop L1 and a first sub-loop L1a that are switchable to each other. The first sub-loop L1a passes through the radiator 5 bypassing part of the first loop L1. Switching between the third pipeline 13 and the fourth pipeline 14 is performed by the third switching unit 33 . The first sub-loop L1a is configured by connecting the first pipeline 11 and the third pipeline 13 and closing the fourth pipeline 14 in the third switching section 33 .

The first loop L1 is selected when the amount of heat generated by the motor 2, the inverter 3, and the power control device 4 is relatively small. In the first loop L1, the heat medium can be cooled only by the chiller 7 without passing through the radiator 5, and waste heat can be efficiently used. On the other hand, the first sub-loop L1a is selected when the amounts of heat generated by the motor 2, the inverter 3, and the power control device 4 are relatively large. In the first sub-loop L1a, the heat medium passes through not only the chiller 7 but also the radiator 5, thereby increasing the cooling efficiency of the heat medium. Therefore, even when the amount of heat generated by the motor 2, the inverter 3, and the electric power control device 4 is large, the temperature of the heat medium can be maintained appropriately. In the first sub-loop L1a, it is possible to reduce the load on the chiller 7 while suppressing the temperature of the motor 2, the inverter 3, and the power control device 4 from becoming too high.

The heat medium may bypass the motor 2 in the first loop L1 or the first sub-loop L1a. Generally, when the temperature of the motor 2 is sufficiently low compared to the temperatures of the inverter 3 and the power control device 4, circulating the heat medium in the first loop L1 (or the first sub-loop L1a) causes the inverter 3 and Heat from the power controller 4 is transferred to the motor 2 . For this reason, the heat of the inverter 3 and the power control device 4 becomes difficult to move to the chiller 7, and the heat exchange efficiency in the chiller 7 decreases. According to this embodiment, the first loop L1 and the first sub-loop L1a are provided with the eleventh pipeline 21 that can bypass the motor 2 . Therefore, according to the temperature of the motor 2 , the heat medium is allowed to pass through a route bypassing the motor 2 , and the heat of the inverter 3 and the power control device 4 can be efficiently transferred to the chiller 7 . Furthermore, when the temperature of the motor 2 is low, by passing the heat medium through a path bypassing the motor 2, the heat generated from the motor 2 does not move to the heat medium, and the motor 2 can be quickly warmed up. can. As a result, the viscosity of the oil filled in the housing of the motor 2 can be quickly lowered, and the motor 2 can be driven in an optimum state.

The second loop L2 passes through the second pump 42 and the battery 6 to circulate the heat medium. In the second loop L2, the heat medium is pumped by the second pump 42 counterclockwise in the figure.

The battery 6 may experience local degradation of its characteristics when there is variation in the temperature distribution of the plurality of cells that constitute it. In the first mode, the temperature of the plurality of cells of the battery 6 can be kept uniform by circulating the heat medium in the second loop L2.

According to this embodiment, the heat medium circuit 10 in the first mode has a first loop L1 (or first sub-loop L1a) passing through the motor 2 and a second loop L2 passing through the battery 6. Also, the first loop L1 (or the first sub-loop L1a) and the second loop L2 are independent of each other. Therefore, the motor 2 and the battery 6 can be adjusted to different optimum temperatures. In addition, "the loops are independent of each other" as used herein means that the heat mediums circulating in the loops are not constantly mixed with each other.

(second mode)
As shown in FIG. 3, the second mode heat medium circuit 10 has a third loop L3.
The third loop L3 includes a first pipeline 11, a fourth pipeline 14, a fifth pipeline 15, a second connecting pipeline 32d, an eighth pipeline 18, a second pipeline 12, a ninth pipeline 19, and a 1 connection pipeline 32c is connected in a loop to circulate the heat medium.

The heat medium circuit 10 is set to the second mode by switching the switching unit 30 as follows. That is, the first switching section 31 allows the eighth conduit 18 and one end of the second conduit 12 to communicate with each other, and allows the other end of the second conduit 12 to communicate with the ninth conduit 19 . The second switching unit 32 connects the ninth pipeline 19, the first connecting pipeline 32c, and the first pipeline 11, and connects the fifth pipeline 15, the second connecting pipeline 32d, and the eighth pipeline 18. communicate. The third switching unit 33 connects the first pipeline 11 and the fourth pipeline 14 and closes the third pipeline 13 . The fourth switching unit 34 closes the eleventh pipeline 21 and opens the first pipeline 11 .

The third loop L3 passes through the first pump 41, power control device 4, inverter 3, motor 2, second pump 42, battery 6, and chiller 7 to circulate the heat medium. The heat medium is pumped by the first pump 41 and the second pump 42 in the third loop L3. The heat medium pressure-fed by the first pump 41 and the second pump 42 passes through each part of the third loop L3 in the order of the power control device 4, the inverter 3, the motor 2, the battery 6, and the chiller 7.

In the third loop L3, the heat of the motor 2, the inverter 3, the power control device 4, and the battery 6 is transferred to the heat medium. Furthermore, this heat is recovered by the chiller 7 and utilized in the air conditioner 50 . In the third loop L3, the heat generated by the motor 2, the inverter 3, the power controller 4, and the battery 6 can be recovered by the chiller 7. Motor 2 , inverter 3 , power controller 4 and battery 6 are cooled by chiller 7 .

Also, when the temperature of the battery 6 is lower than that of the heat medium, the heat transferred from the motor 2 , the inverter 3 , and the power control device 4 to the heat medium is transferred to the battery 6 . As a result, the temperature of the battery 6 can be increased, and deterioration of the characteristics of the battery 6 can be suppressed.

The chiller 7 of this embodiment transfers heat from the heat medium circuit 10 to the heat medium circuit 51 for air conditioning. The heat received by the heat medium circuit 51 for air conditioning from the heat medium circuit 10 via the chiller 7 is used in the air conditioner 50 for heating the vehicle interior.

A tenth pipeline 20 bypassing the chiller 7 is provided in the third loop L3 and the third sub-loop L3a of the present embodiment. Further, the tenth pipeline 20 is provided with an adjustment valve 39 capable of adjusting the ratio between the flow rate of the heat medium passing through the chiller 7 and the flow rate of the heat medium passing through the tenth pipeline 20 . Therefore, the amount of heat transferred from the heat medium circuit 10 to the heat medium circuit 51 for air conditioning can be adjusted by operating the adjustment valve 39 .

More specifically, the adjustment valve 39 increases the flow rate of the heat medium passing through the chiller 7 and decreases the flow rate of the heat medium passing through the tenth pipeline 20 when the demand for heating in the vehicle is relatively high. On the other hand, the regulating valve 39 reduces the flow rate of the heat medium passing through the chiller 7 and increases the flow rate of the heat medium passing through the tenth pipeline 20 when the heating demand in the vehicle is relatively low.

The heat medium circuit 10 in the second mode of the present embodiment can adjust the amount of heat absorbed by the heat medium in the chiller 7 by operating the adjustment valve 39 . As a result, the temperature of the heat medium circulating in the heat medium circuit 10 can be adjusted, and the battery 6 can be appropriately cooled or heated by the heat medium.

The regulating valve 39 can also provide 100:0 regulation where all heat transfer medium reaching the regulating valve 39 from the upstream side flows to either the chiller 7 or the tenth line 20 . When the regulating valve 39 causes all of the heat medium to flow through the tenth pipeline 20 , the heat transferred to the heat medium from the motor 2 , the inverter 3 , and the power controller 4 is not radiated in the chiller 7 . In this case, the heat medium circuit 10 preferably cools the heat medium in the radiator 5 by circulating the heat medium in the third sub-loop L3a.
In addition, when performing only 100:0 adjustment, the adjustment valve 39 may be a three-way valve instead of the mixing valve.

In the second mode, the third sub-loop L3a can be configured by switching the path passed through the third loop L3 from the fourth pipeline 14 to the third pipeline 13. That is, the second mode has a third loop L3 and a third sub-loop L3a that are switchable with each other. The third sub-loop L3a is configured by connecting the first pipeline 11 and the third pipeline 13 and closing the fourth pipeline 14 in the third switching section 33 .

The heat medium circuit 10 in the second mode switches the route through which the heat medium passes from the third loop L3 to the third sub-loop L3a when the temperature of the heat medium exceeds a preset threshold. In the third sub-loop L3a, the heat medium is cooled by the radiator 5, so that the temperature of the heat medium can be kept at an appropriate level even when the amount of heat generated by the motor 2, the inverter 3, and the power control device 4 is large. . As a result, it is possible to reduce the load on the chiller 7 while suppressing the temperature of the motor 2, the inverter 3, and the power control device 4 from becoming too high.

According to this embodiment, the third loop L3 and the third sub-loop L3a are provided with the eleventh pipeline 21 that can bypass the motor 2 . Therefore, in the third loop L3 or the third sub-loop L3a, the heat medium may bypass the motor 2 as in the case of the first loop L1. In this case, the heat of the inverter 3 and the power control device 4 can be efficiently transferred to the chiller 7 without being transferred to the motor 2 .

(Third mode)
As shown in FIG. 4, the third mode heat medium circuit 10 has a fourth loop L4 and a fifth loop L5.
The fourth loop L4 connects the first pipeline 11, the fourth pipeline 14, the fifth pipeline 15, and the sixth pipeline 16 in a loop and circulates the heat medium. That is, the fourth loop L4 is formed by connecting both ends of the first pipeline 11 via the fourth pipeline 14, the fifth pipeline 15, and the sixth pipeline 16 in a loop shape. The fifth loop L5 connects the second pipeline 12, the ninth pipeline 19, the seventh pipeline 17, and the eighth pipeline 18 in a loop and circulates the heat medium.

The heat medium circuit 10 is set to the third mode by switching the switching unit 30 as follows. That is, the first switching section 31 allows the eighth conduit 18 and one end of the second conduit 12 to communicate with each other, and allows the other end of the second conduit 12 to communicate with the ninth conduit 19 . The second switching unit 32 communicates the ninth pipeline 19 , the seventh pipeline 17 and the eighth pipeline 18 and communicates the fifth pipeline 15 , the sixth pipeline 16 and the first pipeline 11 . The third switching unit 33 connects the first pipeline 11 and the fourth pipeline 14 and closes the third pipeline 13 . The fourth switching unit 34 closes the eleventh pipeline 21 and opens the first pipeline 11 .

The fourth loop L4 passes through the first pump 41, power control device 4, inverter 3, and motor 2 to circulate the heat medium. In the fourth loop L4, the heat medium is pumped by the first pump 41 counterclockwise in the figure. The heat medium pressure-fed by the first pump 41 passes through each part of the fourth loop L4 in the order of the power control device 4, the inverter 3, and the motor 2.

In the fourth loop L4, the heat from the motor 2, the inverter 3, and the power control device 4 moves to the heat medium. That is, the heat medium is warmed by motor 2 , inverter 3 , and power control device 4 . In the heat medium circuit 10, the heat stored in the heat medium in the fourth loop L4 of the third mode is transferred to the chiller 7 and efficiently used in the air conditioner 50 when the mode is switched to the first mode or the second mode. can.

In the third mode, the fourth sub-loop L4a can be configured by switching the path passed through the fourth loop L4 from the fourth pipeline 14 to the third pipeline 13. That is, the third mode has a fourth loop L4 and a fourth sub-loop L4a switchable to each other. The fourth sub-loop L4a is configured by allowing the first pipeline 11 and the third pipeline 13 to communicate with each other and closing the fourth pipeline 14 in the third switching section 33 .

According to this embodiment, the fourth loop L4 and the fourth sub-loop L4a are provided with the eleventh pipeline 21 that can bypass the motor 2 . Therefore, in the fourth loop L4 or the fourth sub-loop L4a, the heat medium may bypass the motor 2 as in the case of the first loop L1 and the third loop L3.

The heat medium circuit 10 in the third mode switches the route through which the heat medium passes from the fourth loop L4 to the fourth sub-loop L4a when the temperature of the heat medium exceeds a preset threshold. In the fourth sub-loop L4a, the heat from motor 2, inverter 3, and power control device 4 is transferred to the heat medium. Furthermore, this heat is radiated to the outside air by the radiator 5 . That is, motor 2 , inverter 3 , and power control device 4 are cooled by radiator 5 .

The fifth loop L5 passes through the second pump 42, the battery 6, and the chiller 7 to circulate the heat medium. The heat medium is pumped by the second pump 42 in the fifth loop L5. The heat medium pressure-fed by the second pump 42 passes through each part of the fifth loop L5 in the order of the battery 6 and the chiller 7 .

In the fifth loop L5, the heat of the battery 6 is transferred to the heat medium. Furthermore, this heat is recovered by the chiller 7 and utilized in the air conditioner 50 . Heat generated from the battery 6 can be recovered by the chiller 7 in the fifth loop L5. Battery 6 is cooled by chiller 7 .

A tenth pipeline 20 bypassing the chiller 7 and an adjustment valve 39 are provided in the fifth loop L5 of the present embodiment. Therefore, the heat medium circuit 10 in the third mode of the present embodiment can adjust the amount of heat absorbed by the heat medium in the chiller 7 by operating the adjustment valve 39 . The battery 6 may degrade in performance if the temperature is too low. According to this embodiment, the adjustment valve 39 can adjust the flow rate of the heat medium passing through the chiller 7, and can prevent the temperature of the heat medium circulating through the fifth loop L5 from becoming too low. As a result, excessive cooling of the battery 6 can be suppressed, and the reliability of the battery 6 can be improved.

According to this embodiment, the heat medium circuit 10 in the third mode has a fourth loop L4 (or fourth sub-loop L4a) passing through the motor 2 and a fifth loop L5 passing through the battery 6. Also, the fourth loop L4 (or the fourth sub-loop L4a) and the fifth loop L5 are independent of each other. Therefore, while the battery 6 is cooled by the chiller 7, the heat medium can be circulated to the motor 2 in an independent loop. Thereby, the motor 2 and the battery 6 can be adjusted to different optimum temperatures.

Although each mode of the heat medium circuit 10 of the present embodiment has been described above, the heat medium circuit 10 may have other modes that can be switched by the switching unit 30 . As an example, there may be a fourth mode having the second loop L2 and the fourth loop L4 (or the fourth sub-loop L4a) at the same time.

(Action and effect of the switching part)
Next, the effects of each switching unit 30 will be described.
As shown in FIG. 2, the first switching section 31 is arranged between the first loop L1 and the second loop L2. Further, as shown in FIGS. 2 and 3, the first switching unit 31 connects the first loop L1 and the second loop L2 in a first mode that separates the first loop L1 and the second loop L2. It is possible to switch between the second mode and the third loop L3.

As described above, the first loop L1 passes through the motor 2 and the chiller 7, and the third loop L3 passes through the motor 2, the battery 6 and the chiller 7. According to this embodiment, by switching the mode, the waste heat of the motor 2 and the waste heat of the battery 6 can be transferred to the heat medium circuit 51 for air conditioning and used for the air conditioner 50 by one chiller. According to this embodiment, there is no need to provide a plurality of chillers, the heat medium circuit 10 can be simplified as a whole, and the temperature control device 1 that can be manufactured at low cost can be provided.

As shown in FIG. 4, the second switching section 32 is arranged between the fourth loop L4 and the fifth loop L5. Further, as shown in FIGS. 3 and 4, the second switching unit 32 connects the third mode in which the fourth loop L4 and the fifth loop L5 are separated, and the fourth loop L4 and the fifth loop L5. It is possible to switch between the second mode and the third loop L3.

As described above, the fifth loop L5 passes through the battery 6 and chiller 7 and does not pass through the motor 2. That is, the second switching unit 32 can independently form a loop passing through the battery 6 and the chiller 7 and a loop passing through the motor 2 . Thereby, heat can be transferred from the battery 6 to the chiller 7 regardless of the temperature of the motor 2 , and the waste heat of the battery 6 can be efficiently recovered by the chiller 7 .

The first connecting pipe line 32c and the second connecting pipe line 32d of the second switching section 32 connect the fourth loop L4 and the fifth loop L5. A sixth pipe line (first section) 16, which is one section of the fourth loop L4, is arranged between one end of the first connecting pipe line 32c and one end of the second connecting pipe line 32d. Similarly, a seventh pipeline (second section) 17, which is one section of the fifth loop L5, is arranged between the other end of the first connecting pipeline 32c and the other end of the second connecting pipeline 32d. . That is, the fourth loop L4 has the sixth pipeline 16 located between the connecting portions of the first connecting pipeline 32c and the second connecting pipeline 32d. The fifth loop L5 also has a seventh pipeline 17 located between the connecting portions of the first connecting pipeline 32c and the second connecting pipeline 32d.

In the second switching unit 32 of the present embodiment, a second valve 32b, which is a two-way valve, is arranged in the sixth pipeline 16, and a three-way valve is installed in the connection part of the seventh pipeline 17 with the first connecting pipeline 32c. A certain first valve 32a is arranged. According to this embodiment, two sets of two out of the four pipelines (the first pipeline 11, the fifth pipeline 15, the eighth pipeline 18, and the ninth pipeline 19) without using a four-way valve The conduits can be communicated with each other. Four-way valves are generally expensive and difficult to maintain depending on the application. According to the second switching unit 32 of the present embodiment, since it is not necessary to use a four-way valve, it is possible to construct a switching unit that is inexpensive and excellent in maintainability.

In addition, in the second switching section 32, the second valve 32b may be provided in the seventh pipeline 17, and the first valve 32a may be arranged at the end of the sixth pipeline 16. Further, in the second switching section 32, the first valve 32a may be arranged at either end of the sixth pipeline 16 or the seventh pipeline 17. As shown in FIG. That is, the second valve 32b is arranged in either one of the sixth pipeline 16 and the seventh pipeline 17, and the connection with the other first connecting pipeline 32c or the second connecting pipeline 32d is If the 1st valve|bulb 32a is arrange|positioned, the 2nd switching part 32 instead of a four-way valve can be comprised.

The embodiments of the present invention have been described above, but each configuration and combination thereof in the embodiments are examples, and additions, omissions, replacements, and other modifications of the configuration can be made without departing from the scope of the present invention. is possible. Moreover, the present invention is not limited by the embodiments.

For example, in the above-described embodiment, only the second pump 42 and the battery 6 are arranged in the second pipe line 12, but a heater may also be arranged. In this case, the heat medium flowing through the heat medium circuit 10 can be heated by the heater, and it is easy to keep the battery 6 at an appropriate temperature.

Reference Signs List 1 temperature control device 2 motor 5 radiator 6 battery 7 chiller 10 heat medium circuit 16 sixth pipe (first section) 17 seventh pipe (second section ), 20... Tenth pipe line (detour), 29... Pipe line, 30... Switching part, 31... First switching part (four-way valve), 32... Second switching part, 32a... First valve (three-way valve) , 32b... second valve (two-way valve), 32c... first connecting line, 32d... second connecting line, 39... adjusting valve (valve), 90... vehicle, L1... first loop, L1a... first Sub-loops, L2... second loop, L3... third loop, L3a... third sub-loop, L4... fourth loop, L4a... fourth sub-loop, L5... fifth loop

Claims

a heat medium circuit through which the heat medium flows;
a motor that drives the vehicle;
a battery that powers the motor;
and a chiller that takes heat from the heat medium,
The heat medium circuit is
a first loop that circulates the heat medium through the motor and the chiller;
a second loop that circulates the heat medium through the battery;
a third loop that circulates the heat medium through the motor, the battery, and the chiller;
a first switching unit arranged between the first loop and the second loop;
and a detour that can bypass the chiller,
The first switching unit is
a first mode that separates the first loop and the second loop;
It is possible to switch between a second mode in which the first loop and the second loop are connected to form the third loop,
The detour is provided with a valve that can adjust the ratio between the flow rate of the heat medium passing through the chiller and the flow rate of the heat medium passing through the detour.
temperature control device.
A radiator that cools the heat medium is provided,
The heat medium circuit has a first sub-loop that bypasses part of the first loop and passes through the radiator.
The temperature control device according to claim 1.
The heat medium circuit is
a fourth loop that circulates the heat medium through the motor;
a fifth loop that circulates the heat medium through the battery and the chiller;
a second switching unit arranged between the fourth loop and the fifth loop;
The second switching unit is
a third mode separating the fourth loop and the fifth loop;
It is possible to switch between the second mode by connecting the fourth loop and the fifth loop to form the third loop,
The temperature control device according to claim 1 or 2.
The second switching unit is
a first connecting pipeline and a second connecting pipeline that connect the fourth loop and the fifth loop;
a two-way valve;
a three-way valve;
the fourth loop has a first section located between respective connecting portions of the first connecting conduit and the second connecting conduit;
the fifth loop has a second section located between respective connections of the first connecting conduit and the second connecting conduit;
The two-way valve is arranged in one of the first section and the second section, and the three-way valve is arranged in the connection portion with the other first connecting pipeline or the second connecting pipeline. to be placed,
The temperature control device according to claim 3.
The first switching unit is a four-way valve,
The temperature control device according to any one of claims 1 to 4.