Temperature adjusting system for vehicle and vehicle

Abstract

The invention provides a temperature control system for a vehicle, which cools a rotating electric machine when it is necessary to cool the rotating electric machine, and can improve fuel economy of the vehicle when it is not necessary to cool the rotating electric machine. A vehicle temperature control system is provided with: a first temperature control circuit (61) through which a first temperature control medium circulates and which controls the temperature of an electric motor and a transmission; a second temperature control circuit (62) through which a second temperature control medium circulates; a heat exchanger (63) that exchanges heat between the first temperature control medium and the second temperature control medium; a valve device (626) that adjusts the flow rate of the second temperature control medium flowing through the heat exchanger; and a control unit (ECU) having a valve opening and closing control unit for controlling the valve opening and closing of the valve unit. The valve opening / closing control unit controls the valve device to close when the temperature of the first temperature control medium is less than a predetermined temperature, and controls the valve device to open when the temperature of the first temperature control medium is equal to or greater than the predetermined temperature.

Description

Technical Field

[0001] The present invention relates to a vehicle temperature control system mounted on an electric vehicle or the like, and the vehicle. Background Art

[0002] In recent years, efforts to realize a low-carbon society or a decarbonized society have been actively carried out, and research and development related to vehicle electrification technology has been carried out in order to reduce CO2 emissions and improve energy efficiency in vehicles.

[0003] Generally, an electric vehicle includes a rotating electric machine and a power converter for controlling the power supplied to the rotating electric machine. When the electric vehicle is driven, the rotating electric machine and the power converter generate heat, so most electric vehicles are equipped with a vehicle temperature control system for controlling the temperature of the rotating electric machine and the power converter.

[0004] In the electrification technology of vehicles, it is required to further improve the fuel economy of the vehicle while cooling the rotating electric machine and the power conversion device more efficiently. As a method for improving the fuel economy of the vehicle, it is possible to suppress the increase of friction loss of the rotating electric machine and the gear box. Therefore, for example, Patent Document 1 describes a temperature control system for a vehicle, which controls a flow control valve based on the temperature of a first temperature control medium for temperature control of the rotating electric machine and the gear box and the temperature of a second temperature control medium for temperature control of the power conversion device, thereby suppressing the increase of friction loss of the rotating electric machine and the gear box.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent No. 7314222 Summary of the invention

[0008] Problems to be solved by the invention

[0009] However, in the vehicle temperature control system of Patent Document 1, even when the temperature of the first temperature control medium is below the predetermined temperature, the valve device may be opened. Therefore, there is room for further improvement in order to suppress the increase of friction loss in the gear box. In particular, when the temperature of the first temperature control medium is below the predetermined temperature, it is not necessary to cool the rotating electrical machine. Therefore, it is preferable to increase the temperature of the first temperature control medium earlier to reduce the viscosity of the first temperature control medium.

[0010] The present invention provides a vehicle temperature control system and a vehicle, which cools a rotating electric machine when it is necessary to cool the rotating electric machine and can improve the fuel economy of the vehicle when it is not necessary to cool the rotating electric machine.

[0011] Means for solving problems

[0012] A first aspect of the present invention is a vehicle temperature control system mounted on a vehicle, the vehicle including a rotating electrical machine, a transmission device, and a power conversion device for controlling power supplied to the rotating electrical machine.

[0013] in,

[0014] The vehicle temperature control system comprises:

[0015] A first temperature control circuit, which is provided with a first pump and is used for circulating a first temperature control medium to control the temperature of the rotating motor and the speed change device;

[0016] A second temperature control circuit is provided with a second pump and is used for circulating a second temperature control medium to control the temperature of the power conversion device;

[0017] a heat exchanger for performing heat exchange between the first temperature control medium and the second temperature control medium;

[0018] a flow regulating valve for regulating the flow of the second temperature regulating medium flowing in the heat exchanger; and

[0019] a control device for controlling the flow regulating valve,

[0020] The second temperature control circuit has:

[0021] a pressurized conveying flow path provided with the second pump, a branch portion provided at one end of the pressurized conveying flow path, and a confluence portion provided at the other end of the pressurized conveying flow path;

[0022] a first branch flow path provided with the power conversion device, wherein one end of the first branch flow path is connected to the branch portion, and the other end of the first branch flow path is connected to the confluence portion; and

[0023] a second branch flow path, which is provided with the heat exchanger and the flow regulating valve, wherein one end of the second branch flow path is connected to the branch portion, the other end of the second branch flow path is connected to the confluence portion, and the second branch flow path is formed in parallel with the first branch flow path,

[0024] A radiator for performing heat exchange between the second temperature control medium and external air is provided in the pressurized transport flow path.

[0025] The control device has:

[0026] A first temperature control medium temperature detection unit configured to detect a temperature of the first temperature control medium; and

[0027] a valve opening and closing control unit, which controls the opening and closing of the flow regulating valve,

[0028] When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the valve opening and closing control unit controls the flow rate regulating valve to be closed.

[0029] When the flow rate regulating valve is closed, the valve opening and closing control unit controls the flow rate regulating valve to open when the temperature of the first temperature regulating medium detected by the first temperature regulating medium temperature detection unit becomes equal to or higher than the predetermined temperature.

[0030] A second aspect of the present invention is a vehicle including a rotating electrical machine, a transmission device, a power conversion device for controlling electric power supplied to the rotating electrical machine, and a vehicle temperature control system.

[0031] in,

[0032] The vehicle temperature control system comprises:

[0033] A first temperature control circuit, which is provided with a first pump and is used for circulating a first temperature control medium to control the temperature of the rotating motor and the speed change device;

[0034] A second temperature control circuit is provided with a second pump and is used for circulating a second temperature control medium to control the temperature of the power conversion device;

[0035] a heat exchanger for performing heat exchange between the first temperature control medium and the second temperature control medium;

[0036] a flow regulating valve for regulating the flow of the second temperature regulating medium flowing in the heat exchanger; and

[0037] a control device for controlling the flow regulating valve,

[0038] The second temperature control circuit has:

[0039] a pressurized conveying flow path provided with the second pump, a branch portion provided at one end of the pressurized conveying flow path, and a confluence portion provided at the other end of the pressurized conveying flow path;

[0040] a first branch flow path provided with the power conversion device, wherein one end of the first branch flow path is connected to the branch portion, and the other end of the first branch flow path is connected to the confluence portion; and

[0041] a second branch flow path, which is provided with the heat exchanger and the flow regulating valve, wherein one end of the second branch flow path is connected to the branch portion, the other end of the second branch flow path is connected to the confluence portion, and the second branch flow path is formed in parallel with the first branch flow path,

[0042] A radiator for performing heat exchange between the second temperature control medium and external air is provided in the pressurized transport flow path.

[0043] The control device has:

[0044] A first temperature control medium temperature detection unit configured to detect a temperature of the first temperature control medium; and

[0045] a valve opening and closing control unit, which controls the opening and closing of the flow regulating valve,

[0046] When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the valve opening and closing control unit controls the flow rate regulating valve to be closed.

[0047] When the flow rate regulating valve is closed, the valve opening and closing control unit controls the flow rate regulating valve to open when the temperature of the first temperature regulating medium detected by the first temperature regulating medium temperature detection unit becomes equal to or higher than the predetermined temperature.

[0048] Effects of the Invention

[0049] According to the present invention, when the rotating electric machine needs to be cooled, the rotating electric machine is cooled by the first temperature control medium, and when the rotating electric machine does not need to be cooled, the temperature of the first temperature control medium is increased, thereby improving the fuel economy of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a block diagram of a vehicle temperature control system according to one embodiment of the present invention.

[0051] Figure 2 Yes means Figure 1 A diagram showing the structure of a valve device in a vehicle temperature control system.

[0052] Figure 3 yes Figure 1 A block diagram of a control device in a temperature control system for a vehicle.

[0053] Figure 4 Yes means Figure 3 Flow chart of the control process of the valve device in the valve opening and closing control unit in the control device.

[0054] Description of Reference Numerals

[0055] 10 Vehicle temperature control system

[0056] 20 Electric motor (rotating electrical machine)

[0057] 40 Speed ​​changer

[0058] 50 Power conversion device

[0059] 61 First temperature control circuit

[0060] 611 First Pump

[0061] 62 Second temperature control circuit

[0062] 620a Pressurized delivery flow path

[0063] 620b1 First branch flow path

[0064] 620b2 Second branch flow path

[0065] 621 Second Pump

[0066] 622 Radiator

[0067] 624 Branch

[0068] 625 Junction

[0069] 626 Valve device (flow control valve)

[0070] 63 Heat exchanger

[0071] 71 First temperature control medium temperature detection unit

[0072] 73 Valve opening and closing control unit

[0073] 74 Vehicle speed detection unit

[0074] 75 Slope angle detection unit

[0075] 76 Uphill driving determination unit

[0076] 77 Slippage Determination Unit

[0077] 78 Driving torque detection unit

[0078] ECU control unit

[0079] TCM1 First temperature control medium

[0080] TCM2 Second temperature control medium

[0081] Tset1 Specified temperature

[0082] V Vehicle. DETAILED DESCRIPTION

[0083] Hereinafter, one embodiment of a vehicle equipped with a vehicle temperature control system according to the present invention will be described based on the drawings. In addition, the drawings are viewed along the direction of the reference numerals.

[0084] (Overall structure of vehicle temperature control system)

[0085] like Figure 1 As shown, the vehicle temperature control system 10 of the present embodiment is mounted on a vehicle V, and the vehicle V is equipped with an internal combustion engine ICE, a control device ECU, an electric motor 20, a generator 30, a transmission device 40, and a power conversion device 50. In addition, the vehicle temperature control system 10 includes the internal combustion engine ICE, the control device ECU, the electric motor 20, the generator 30, the transmission device 40, the power conversion device 50, and a temperature control circuit 60.

[0086] The electric motor 20 is a rotating electrical machine that outputs power for driving the vehicle V using power stored in a power storage device (not shown) mounted on the vehicle V or power generated by a generator 30. The electric motor 20 can also generate power using kinetic energy of the driving wheels of the vehicle V when the vehicle V is braked to charge the power storage device.

[0087] The generator 30 is a rotating electric machine that generates electric power using the power of the internal combustion engine ICE. The generator 30 charges the above-mentioned power storage device or supplies electric power to the electric motor 20.

[0088] The transmission 40 is a device that reduces the speed of the power output from the electric motor 20 and transmits it to the drive wheels. The transmission 40 is, for example, a gear-type power transmission device.

[0089] The power conversion device 50 includes a PDU (Power Drive Unit) (not shown) and a VCU (Voltage Control Unit) (not shown). The PDU converts the power output from the power storage device from DC to AC to control the input and output power of the motor 20 and the generator 30. The VCU boosts the power output from the power storage device as needed. The VCU can also step down the power generated by the motor 20 when the motor 20 generates power during braking of the vehicle V.

[0090] The temperature control circuit 60 includes: a first temperature control circuit 61, in which a non-conductive first temperature control medium TCM1 circulates to control the temperature of the motor 20, the generator 30 and the transmission 40; a second temperature control circuit 62, in which a conductive second temperature control medium TCM2 circulates to control the temperature of the power conversion device 50; and a heat exchanger 63, which performs heat exchange between the first temperature control medium TCM1 and the second temperature control medium TCM2. The non-conductive first temperature control medium TCM1 is, for example, an oil called ATF (Automatic Transmission Fluid) that can lubricate and control the temperature of the motor 20, the generator 30 and the transmission 40. The conductive second temperature control medium TCM2 is, for example, cooling water called LLC (Long Life Coolant).

[0091] (Structure of the first temperature control circuit)

[0092] The first temperature control circuit 61 is provided with a first pump 611 and a storage portion 612. The first pump 611 is a mechanical pump driven by the power of the internal combustion engine ICE and the rotational force of an axle (not shown) of the vehicle V. The storage portion 612 stores the first temperature control medium TCM1 circulating in the first temperature control circuit 61. The storage portion 612 is, for example, an oil pan, and is provided at the bottom of a housing (not shown) that accommodates the electric motor 20, the generator 30, and the transmission 40.

[0093] The first temperature control circuit 61 has a pressurized conveying flow path 610a, which is provided with a first pump 611, and the upstream end of the pressurized conveying flow path 610a is connected to the storage part 612. A branch part 613 is provided at the downstream end of the pressurized conveying flow path 610a. The first temperature control circuit 61 has a first branch flow path 610b1, which is provided with a heat exchanger 63, a motor 20 and a generator 30, and the upstream end of the first branch flow path 610b1 is connected to the branch part 613, and the downstream end of the first branch flow path 610b1 is connected to the storage part 612. In the first branch flow path 610b1, the heat exchanger 63 is arranged at a position upstream of the motor 20 and the generator 30, and the motor 20 and the generator 30 are arranged in parallel. The first temperature control circuit 61 has a second branch flow path 610b2, which is provided with a speed change device 40. The upstream end of the second branch flow path 610b2 is connected to the branch part 613, and the downstream end of the second branch flow path 610b2 is connected to the storage part 612.

[0094] Therefore, in the first temperature control circuit 61, the first temperature control medium TCM1 pressure-fed from the first pump 611 in the pressure-fed flow path 610a passes through the first branch flow path 610b1 from the branch portion 613, exchanges heat with the second temperature control medium TCM2 in the heat exchanger 63 and is cooled, and is supplied to the motor 20 and the generator 30 to lubricate and temperature-control the motor 20 and the generator 30, and then is stored in the flow path of the storage portion 612 and the pressure-fed flow path 610b1. After the first temperature control medium TCM1 pressurized and delivered from the first pump 611 in a is supplied to the speed change device 40 from the branch portion 613 through the second branch flow path 610b2 to lubricate and temperature-control the speed change device 40, the flow paths stored in the storage portion 612 are formed in parallel, and the first temperature control medium TCM1 stored in the storage portion 612 flows in the pressurized delivery flow path 610a and is supplied to the first pump 611, and the first temperature control medium TCM1 circulates in the first temperature control circuit 61.

[0095] In this embodiment, the first branch flow path 610b1 and the second branch flow path 610b2 are formed so that the flow rate of the first temperature control medium TCM1 flowing in the first branch flow path 610b1 is greater than the flow rate of the first temperature control medium TCM1 flowing in the second branch flow path 610b2.

[0096] The first temperature control circuit 61 is provided with a first temperature sensor 61a, which detects the temperature of the first temperature control medium TCM1 circulating in the first temperature control circuit 61. In the present embodiment, the first temperature sensor 61a is provided in a storage portion 612 as an oil pan, and detects the temperature of the first temperature control medium TCM1 stored in the storage portion 612. The first temperature sensor 61a outputs the detected value of the temperature of the first temperature control medium TCM1 stored in the storage portion 612 to the control unit ECU.

[0097] The first temperature regulating circuit 61 also has a pressure regulating circuit 610c, the upstream end of which is connected to the storage section 612, and the downstream end of which is connected to the pressurized delivery flow path 610a at a position downstream of the first pump 611. A pressure regulating valve 619 is provided in the pressure regulating circuit 610c. The pressure regulating valve 619 may be a check valve or an electromagnetic valve such as an electromagnetic reversing valve. When the hydraulic pressure of the first temperature regulating medium TCM1 pressurized and delivered from the first pump 611 becomes above a prescribed upper limit pressure, the pressure regulating valve 619 is in an open state, and a part of the first temperature regulating medium TCM1 pressurized and delivered from the first pump 611 returns to the storage section 612. As a result, the hydraulic pressure of the first temperature regulating medium TCM1 flowing in the first branch flow path 610b1 and the second branch flow path 610b2 is maintained below the upper limit pressure.

[0098] In the first temperature control circuit 61 , after cooling the motor 20 , the generator 30 , and the transmission 40 , the temperature of the first temperature control medium TCM1 stored in the storage portion 612 is approximately 100° C. Therefore, the first temperature control medium TCM1 at approximately 100° C. is supplied to the heat exchanger 63 .

[0099] (Structure of the second temperature control circuit)

[0100] The second temperature control circuit 62 is provided with a second pump 621, a radiator 622, a storage tank 623, and a power conversion device 50. The second pump 621 is, for example, an electric pump driven by the electric power stored in the above-mentioned power storage device. A rotation speed sensor 621a for detecting the rotation speed of the second pump 621 is installed on the second pump 621. The rotation speed sensor 621a outputs the detected value of the rotation speed of the second pump 621 to the control device ECU. The radiator 622 is arranged at the front of the vehicle V, and is a heat dissipation device for cooling the second temperature control medium TCM2 by performing heat exchange between the second temperature control medium TCM2 and the external air using the running wind when the vehicle V is running. The storage tank 623 is a tank that temporarily stores the second temperature control medium TCM2 circulating in the second temperature control circuit 62. Even if cavitation occurs in the second temperature control medium TCM2 circulating in the second temperature control circuit 62 , the cavitation occurring in the second temperature control medium TCM2 disappears by temporarily storing the second temperature control medium TCM2 circulating in the second temperature control circuit 62 in the storage tank 623 .

[0101] The second temperature control circuit 62 has a pressurized conveying flow path 620a in which a storage tank 623, a second pump 621, and a radiator 622 are provided in order from the upstream side. A confluence portion 625 is provided at the upstream end of the pressurized conveying flow path 620a, and a branch portion 624 is provided at the downstream end of the pressurized conveying flow path 620a. Therefore, the second temperature control medium TCM2 flowing into the pressurized conveying flow path 620a from the confluence portion 625 is temporarily stored in the storage tank 623, and then is pressurized and conveyed by the second pump 621 and supplied to the radiator 622, and is cooled by heat exchange with the external air, and then flows to the branch portion 624.

[0102] The second temperature control circuit 62 further includes a first branch flow path 620b1 and a second branch flow path 620b2. The first branch flow path 620b1 is provided with the power conversion device 50. The upstream end of the first branch flow path 620b1 is connected to the branch portion 624. The first branch flow path 620b1 passes through the power conversion device 50. The downstream end of the first branch flow path 620b1 is connected to the confluence portion 625. The second branch flow path 620b2 is provided with the heat exchanger 63. The upstream end of the second branch flow path 620b2 is connected to the branch portion 624. The second branch flow path 620b2 passes through the heat exchanger 63. The downstream end of the second branch flow path 620b2 is connected to the confluence portion 625. In the present embodiment, a valve device 626 is provided at a portion of the second branch flow path 620b2 upstream of the heat exchanger 63. In this embodiment, the valve device 626 is an electromagnetic switching valve that switches the second branch flow path 620b2 to either a fully open state or a fully closed state. The valve device 626 is controlled by the control unit ECU. The detailed structure of the valve device 626 will be described later.

[0103] Therefore, the second temperature control medium TCM2, which is pressure-transferred by the second pump 621 in the pressurized conveying flow path 620a and cooled by the radiator 622, branches into the first branch flow path 620b1 and the second branch flow path 620b2 at the branch portion 624. The second temperature control medium TCM2 flowing in the first branch flow path 620b1 cools the power conversion device 50, and merges with the second branch flow path 620b2 and the pressurized conveying flow path 620a at the confluence portion 625. The second temperature control medium TCM2 flowing in the second branch flow path 620b2 exchanges heat with the first temperature control medium TCM1 in the heat exchanger 63, thereby cooling the first temperature control medium TCM1, and merges with the first branch flow path 620b1 and the pressurized conveying flow path 620a at the confluence portion 625. The second temperature control medium TCM2 flowing in the first branch flow path 620b1 merges with the second temperature control medium TCM2 flowing in the second branch flow path 620b2 at the confluence portion 625, flows in the pressurized delivery flow path 620a, and is temporarily stored in the storage tank 623. Then, the second temperature control medium TCM2 stored in the storage tank 623 is supplied to the second pump 621 again through the pressurized delivery flow path 620a, and the second temperature control medium TCM2 circulates in the second temperature control circuit 62.

[0104] In this embodiment, the first branch flow path 620b1 and the second branch flow path 620b2 are formed such that the flow rate of the second temperature control medium TCM2 flowing in the first branch flow path 620b1 is greater than the flow rate of the second temperature control medium TCM2 flowing in the second branch flow path 620b2.

[0105] The second temperature control circuit 62 is provided with a second temperature sensor 62a, which detects the temperature of the second temperature control medium TCM2 circulating in the second temperature control circuit 62. In the present embodiment, the second temperature sensor 62a is provided between the radiator 622 and the branch portion 624 in the pressurized delivery flow path 620a, and detects the temperature of the second temperature control medium TCM2 discharged from the radiator 622. The second temperature sensor 62a outputs the detected value of the temperature of the second temperature control medium TCM2 discharged from the radiator 622 to the control unit ECU.

[0106] In the second temperature control circuit 62 , the temperature of the second temperature control medium TCM2 cooled by the radiator 622 is about 40° C. Since the second temperature control medium TCM2 supplied to the heat exchanger 63 does not pass through the power conversion device 50 as the temperature controlled device, the second temperature control medium TCM2 at about 40° C. is supplied to the heat exchanger 63 .

[0107] (Structure of heat exchanger)

[0108] The heat exchanger 63 performs heat exchange between the first temperature control medium TCM1 at about 100 [°C] and the second temperature control medium TCM2 at about 40 [°C] supplied to the heat exchanger 63. Then, the first temperature control medium TCM1 at about 80 [°C] is discharged from the heat exchanger 63 to the downstream side of the first branch flow path 610b1 in the first temperature control circuit 61, and the second temperature control medium TCM2 at about 70 [°C] is discharged from the heat exchanger 63 to the downstream side of the second branch flow path 620b2 in the second temperature control circuit 62.

[0109] In this way, the first temperature control medium TCM1 is cooled by the heat exchanger 63, so the temperature control circuit 60 can cool the first temperature control medium TCM1 even if a radiator for cooling the first temperature control medium TCM1 is not provided. Therefore, the temperature control circuit 60 can cool the first temperature control medium TCM1 flowing in the first temperature control circuit 61 and the second temperature control medium TCM2 flowing in the second temperature control circuit 62 by using one radiator 622, so the temperature control circuit 60 can be miniaturized.

[0110] (Structure of valve device)

[0111] Next, refer to Figure 2 The structure of the valve device 626 will be described.

[0112] like Figure 2 As shown, the valve device 626 includes: an inlet portion 626a, which allows the second temperature control medium TCM2 to flow in; an outlet portion 626b, which discharges the second temperature control medium TCM2; a valve internal flow path 626c, which extends from the inlet portion 626a to the outlet portion 626b; a valve body component 626d, which is arranged in the valve internal flow path 626c, and opens and closes the valve internal flow path 626c; a force-applying component 626e, which applies force to the valve body component 626d; and a solenoid portion not shown in the figure, which can generate electromagnetic force.

[0113] In the present embodiment, the valve internal flow path 626c extends approximately linearly, and the valve body component 626d is arranged near the inlet portion 626a. The valve body component 626d is arranged to slide along the inner wall surface 626c1 of the valve internal flow path 626c. The valve body component 626d is shaped to be able to close the inlet portion 626a. In the present embodiment, the valve body component 626d is in the shape of a disk. The valve body component 626d is attracted by the electromagnetic force generated by the solenoid portion not shown. The force component 626e is, for example, an elastic component such as a coil spring. One end of the force component 626e is connected to the end of the valve internal flow path 626c on the inlet portion 626a side, and the other end of the force component 626e is connected to the valve body component 626d. In addition, the force component 626e applies a force to the valve body component 626d to make it move away from the inlet portion 626a.

[0114] In the valve internal flow path 626c, a stopper 626f is formed on the side of the valve body member 626d closer to the outlet portion 626b. The stopper 626f is, for example, a protrusion protruding toward the flow path center of the valve internal flow path 626c. The stopper 626f can stop the valve body member 626d sliding along the inner wall surface 626c1 of the valve internal flow path 626c.

[0115] like Figure 2 As shown in (a), the valve device 626 is in a fully open state when the solenoid part (not shown) does not generate electromagnetic force in the off state. At this time, the valve body part 626d is forced away from the inlet part 626a by the force of the force applying part 626e and is locked in the locking part 626f.

[0116] like Figure 2 As shown in (b), the valve device 626 is in a fully closed state when the solenoid part (not shown) generates electromagnetic force in the on state. At this time, the valve body part 626d is attracted toward the inlet part 626a by the electromagnetic force generated by the solenoid part (not shown), overcomes the force of the force applying part 626e and moves toward the inlet part 626a, thereby closing the inlet part 626a.

[0117] Furthermore, when the solenoid unit (not shown) is turned off again and the valve device 626 is turned to the fully open state, the valve body member 626d is moved in a direction away from the inlet portion 626a by the combined force of the fluid pressure of the second temperature control medium TCM2 in the inlet portion 626a and the force of the force member 626e. At this time, if the fluid pressure of the second temperature control medium TCM2 from the outlet portion 626b toward the valve body member 626d is not greater than the combined force of the fluid pressure of the second temperature control medium TCM2 in the inlet portion 626a and the force of the force member 626e, the valve device 626 can be turned to the fully open state. Moreover, when the valve device 626 is in a fully closed state, the pressure on the upstream side of the valve device 626, i.e., the inlet portion 626a side, becomes higher, and the pressure on the downstream side of the valve device 626, i.e., the outlet portion 626b side, becomes lower. Therefore, it is difficult for the fluid pressure of the second temperature regulating medium TCM2 from the outlet portion 626b side toward the valve body part 626d to become greater than the combined force of the fluid pressure of the second temperature regulating medium TCM2 in the inlet portion 626a and the force of the force applying part 626e.

[0118] In this way, the valve device 626 is formed so that when it is fully closed, the valve body member 626d moves toward the inlet portion 626a to block the inlet portion 626a, thereby preventing the valve device 626 from being fixed in the fully closed state. In addition, the force of the force member 626e required to shift the valve device 626 from the fully closed state to the fully open state can be reduced, so the cost of the force member 626e can be reduced, and the cost of the valve device 626 can be reduced.

[0119] (Structure of control device)

[0120] The control unit ECU controls the internal combustion engine ICE, the power conversion device 50, the second pump 621, and the valve device 626. The control unit ECU may also detect a failure of the heat exchanger 63 based on the detection value of the rotation speed of the second pump 621 output from the rotation speed sensor 621a. For example, the control unit ECU may also determine that a failure has occurred in the heat exchanger 63 when the variation range of the detection value of the rotation speed of the second pump 621 output from the rotation speed sensor 621a relative to the target rotation speed is greater than a predetermined value, thereby detecting the failure of the heat exchanger 63.

[0121] like Figure 3 As shown, the control device ECU has: a first temperature control medium temperature detection unit 71, which detects the temperature of the first temperature control medium TCM1 based on the signal from the first temperature sensor 61a; a second temperature control medium temperature detection unit 72, which detects the temperature of the second temperature control medium TCM2 based on the signal from the second temperature sensor 62a; a valve opening and closing control unit 73, which controls the opening and closing of the valve device 626; a vehicle speed detection unit 74, which detects the vehicle speed of the vehicle V; a slope angle detection unit 75, which detects the slope angle of the road surface on which the vehicle V is traveling; an uphill driving determination unit 76, which determines whether the vehicle V is traveling uphill based on the detection values ​​in the vehicle speed detection unit 74 and the slope angle detection unit 75; a slip determination unit 77, which determines whether at least one wheel of the vehicle V is idling; and a driving torque detection unit 78, which detects the driving torque of the vehicle V.

[0122] (Control flow of the valve device by the valve opening and closing control unit in the control device)

[0123] Next, refer to Figure 4 The flow of control of the valve device 626 by the valve opening and closing control unit 73 in the control unit ECU will be described.

[0124] The control process of the valve device 626 by the valve opening and closing control unit 73 starts when the vehicle V switches from the power-off state to the power-on state. The power-on state of the vehicle V refers to a state in which the power system of the vehicle V is turned on, at least one of the internal combustion engine ICE and the electric motor 20 as the driving source of the vehicle V is started, and the power required for the driving of the vehicle V is supplied to the auxiliary machines required for the driving of the vehicle V. The power-on state of the vehicle V refers to a state in which the vehicle V is running, or a state in which the vehicle V can run immediately. The power-on operation of the power system refers to, for example, an operation in which a power switch (not shown) provided in the vehicle V is turned on by the operator of the vehicle V. In addition, the power-on operation of the power system may also be an operation in which the ignition switch for starting the internal combustion engine ICE is turned on by the operator of the vehicle V.

[0125] First, when the vehicle V switches from the power-off state to the power-on state, the valve opening and closing control unit 73 controls the valve device 626 to close the valve (step S101 ). Then, the process proceeds to step S102 .

[0126] In step S102 , the valve opening / closing control unit 73 determines whether the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than a predetermined temperature Tset1 [° C.] The predetermined temperature Tset1 is, for example, 80 [° C.].

[0127] In step S102 , when the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than the predetermined temperature Tset1 [° C.] (step S102 : Yes), the valve opening and closing control unit 73 proceeds to step S202 .

[0128] In step S102, when the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is not less than the specified temperature Tset1 [°C], that is, when the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is above the specified temperature Tset1 [°C] (step S102: No), the valve opening and closing control unit 73 enters step S103.

[0129] In step S103 , the valve opening / closing control unit 73 determines whether the uphill travel determination unit 76 determines that the vehicle V is traveling uphill.

[0130] The uphill travel determination unit 76 stores, for example, a table in which the slope angles serving as threshold values ​​are set corresponding to the vehicle speeds of the vehicle V. For example, the slope angle serving as the threshold value when the vehicle speed of the vehicle V is 10 [km / h] is 10 [°], the slope angle serving as the threshold value when the vehicle speed of the vehicle V is 80 [km / h] is 6 [°], the slope angle serving as the threshold value when the vehicle speed of the vehicle V is 120 [km / h] is 4 [°], and the like.

[0131] The uphill travel determination unit 76 determines whether the vehicle V is traveling uphill based on the vehicle speed of the vehicle V detected by the vehicle speed detection unit 74 and the slope angle of the road surface on which the vehicle V is traveling detected by the slope angle detection unit 75. For example, referring to the above table in which the slope angles serving as threshold values ​​are set corresponding to the respective vehicle speeds of the vehicle V, when the slope angle of the road surface on which the vehicle V is traveling detected by the slope angle detection unit 75 is greater than the slope angle serving as the threshold value corresponding to the vehicle speed of the vehicle V detected by the vehicle speed detection unit 74, it is determined that the vehicle V is traveling uphill, and when the slope angle is less than the slope angle serving as the threshold value corresponding to the vehicle speed of the vehicle V detected by the vehicle speed detection unit 74, it is determined that the vehicle V is not traveling uphill.

[0132] In step S103 , when the uphill travel determination unit 76 determines that the vehicle V is traveling uphill (step S103 : Yes), the valve opening and closing control unit 73 proceeds to step S201 to control the valve device 626 to open, and then proceeds to step S202 .

[0133] In step S103 , when the uphill travel determination unit 76 determines that the vehicle V is not traveling uphill (step S103 : No), the valve opening and closing control unit 73 proceeds to step S104 .

[0134] In step S104 , the valve opening / closing control unit 73 determines whether the slip determination unit 77 determines that at least one wheel of the vehicle V is spinning.

[0135] For example, the vehicle V has front, rear, left and right wheels, and each wheel is provided with a wheel speed sensor for detecting the rotation speed of the wheel. The slip determination unit 77 determines that either the left or right front wheel is idling when the wheel speed difference between the left and right front wheels is greater than a specified value, and determines that either the left or right rear wheel is idling when the wheel speed difference between the left and right rear wheels is greater than a specified value based on the detection signal output from the wheel speed sensor provided on each wheel.

[0136] In step S104 , when the slip determination unit 77 determines that at least one wheel of the vehicle V is spinning (step S104 : Yes), the valve opening and closing control unit 73 proceeds to step S201 to control the valve device 626 to open, and then proceeds to step S202 .

[0137] In step S104 , when the slip determination unit 77 determines that the wheels of the vehicle V are not spinning (step S104 : No), the valve opening and closing control unit 73 proceeds to step S105 .

[0138] In step S105, the valve opening and closing control unit 73 determines whether the driving torque of the vehicle V detected by the driving torque detection unit 78 is greater than or equal to the prescribed value Nset1 [N·m]. The prescribed value Nset1 [N·m] is, for example, a value greater than or equal to the maximum torque required when the vehicle V is traveling without towing a towed vehicle such as a trailer or other vehicles such as a broken-down vehicle, and is a value of the driving torque required when the vehicle V is traveling while towing the towed vehicle or other vehicles. The prescribed value Nset1 [N·m] is, for example, 4000 [N·m].

[0139] For example, the vehicle V is provided with a torque sensor for detecting the torsion angle of the drive shaft of the vehicle V, and the driving torque detection unit 78 detects the driving torque of the vehicle V based on a detection signal corresponding to the torsion angle of the drive shaft output from the torque sensor.

[0140] In step S105 , when the driving torque of the vehicle V detected by the driving torque detection unit 78 is greater than or equal to the predetermined value Nset1 [N·m] (step S105 : Yes), the valve opening and closing control unit 73 proceeds to step S201 to control the valve device 626 to open the valve, and then proceeds to step S202 .

[0141] In step S105, when the driving torque of the vehicle V detected by the driving torque detection unit 78 is not greater than the specified value Nset1 [N·m], that is, when the driving torque of the vehicle V detected by the driving torque detection unit 78 is less than the specified value Nset1 [N·m] (step S105: No), the valve opening and closing control unit 73 maintains the valve device 626 in the closed valve state and enters step S202.

[0142] In step S202 , the valve opening / closing control unit 73 determines whether the vehicle V has switched from the power-on state to the power-off state.

[0143] In step S202 , when the vehicle V is switched from the power-on state to the power-off state (step S202 : Yes), the valve opening and closing control unit 73 ends a series of controls.

[0144] In step S202 , when the vehicle V maintains the power-on state and is not switched to the power-off state (step S202 : No), the valve opening and closing control unit 73 returns to step S102 .

[0145] In this way, when the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than the specified temperature Tset1 [°C], the valve opening and closing control unit 73 controls the valve device 626 to be closed regardless of the temperature of the second temperature control medium TCM2. When the valve device 626 is closed, when the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 becomes higher than the specified temperature Tset1 [°C], the valve device 626 is controlled to be open.

[0146] Generally, the higher the temperature, the lower the viscosity of the first temperature control medium TCM1. Therefore, in the first temperature control circuit 61, when the motor 20, the generator 30 and the transmission 40 are lubricated and temperature-controlled by the first temperature control medium TCM1, the higher the temperature of the first temperature control medium TCM1, the less the friction loss.

[0147] In the present embodiment, when the temperature of the first temperature control medium TCM1 is lower than the predetermined temperature Tset1 [°C], the motor 20 and the generator 30 are not at high temperatures and are not in a state where they need to be cooled. On the other hand, the valve device 626 is closed, so the second temperature control medium TCM2 cooled by the radiator 622 is not supplied to the heat exchanger 63. Therefore, the first temperature control medium TCM1 is not cooled by the heat exchanger 63, and the temperature of the first temperature control medium TCM1 rises due to the heat generated by the motor 20 and the generator 30, and the viscosity of the first temperature control medium TCM1 decreases, so that the friction loss can be reduced, and the fuel economy of the vehicle V is improved. In addition, when the temperature of the first temperature control medium TCM1 is higher than the predetermined temperature Tset1 [°C], the valve device 626 is opened, and the second temperature control medium TCM2 cooled by the radiator 622 is supplied to the heat exchanger 63, and the first temperature control medium TCM1 is cooled by heat exchange with the second temperature control medium TCM2 in the heat exchanger 63, and the motor 20 and the generator 30 are cooled by the first temperature control medium TCM1.

[0148] Thus, when the motor 20 and the generator 30 do not need to be cooled, the valve device 626 is closed, thereby reducing the viscosity of the first temperature control medium TCM1, thereby reducing friction loss and improving the fuel economy of the vehicle V. On the other hand, when the motor 20 and the generator 30 need to be cooled, the valve device 626 is opened, thereby cooling the first temperature control medium TCM1 and further cooling the motor 20 and the generator 30.

[0149] In this way, when the motor 20 and the generator 30 need to be cooled, the motor 20 and the generator 30 are cooled by the first temperature control medium TCM1, and when the motor 20 and the generator 30 do not need to be cooled, the temperature of the first temperature control medium TCM1 can be increased, thereby improving the fuel economy of the vehicle V.

[0150] In addition, even if the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than the specified temperature Tset1 [°C], when the uphill driving determination unit 76 determines that the vehicle V is driving uphill, the valve opening and closing control unit 73 also controls the valve device 626 to open the valve. Therefore, when the vehicle V is driving in a state where the motor 20 and the generator 30 are more likely to generate heat than during normal driving, the motor 20 and the generator 30 can be quickly cooled.

[0151] Furthermore, even if the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than the predetermined temperature Tset1 [°C], when the slip determination unit 77 determines that at least one wheel of the vehicle V is idling, the valve opening and closing control unit 73 controls the valve device 626 to be open, so that when the vehicle V is driving in which the motor 20 and the generator 30 are more likely to generate heat than during normal driving, the motor 20 and the generator 30 can be quickly cooled.

[0152] Furthermore, even if the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than the specified temperature Tset1 [°C], when the driving torque detected by the driving torque detection unit 78 is greater than the specified value Nset1 [N·m], the valve opening and closing control unit 73 controls the valve device 626 to be open. Therefore, when the vehicle V is performing towing driving in which the motor 20 and the generator 30 are more likely to generate heat than during normal driving, the motor 20 and the generator 30 can be quickly cooled.

[0153] Furthermore, in the present embodiment, in the control process of the valve opening and closing control unit 73 on the valve device 626, when the temperature of the first temperature control medium TCM1 detected by the first temperature control medium temperature detection unit 71 is lower than the prescribed temperature Tset1 [°C], it is determined in sequence whether the uphill driving determination unit 76 determines that the vehicle V is driving uphill, whether the slip determination unit 77 determines that at least one wheel of the vehicle V is idling, and whether the driving torque detected by the driving torque detection unit 78 is greater than the prescribed value Nset1 [N·m].

[0154] In this way, it is determined in sequence whether the driving state of the vehicle V is a driving state in which the motor 20 and the generator 30 are prone to heat up. Therefore, when the driving state of the vehicle V is a driving state in which the motor 20 and the generator 30 are prone to heat up, the motor 20 and the generator 30 can be cooled more quickly.

[0155] Above, an embodiment of the present invention has been described with reference to the accompanying drawings, but the present invention is certainly not limited to this embodiment. Obviously, those skilled in the art can think of various variations or modifications within the scope of the technical solution, and it should be understood that these variations and modifications also belong to the technical scope of the present invention. In addition, the various constituent elements in the above-mentioned embodiment can also be arbitrarily combined within the scope of the main purpose of the invention.

[0156] For example, in the present embodiment, the vehicle V includes the internal combustion engine ICE, but the vehicle V may be an electric vehicle without the internal combustion engine ICE. In addition, in the present embodiment, the vehicle V includes the generator 30 , but the vehicle V may be a vehicle without the generator 30 .

[0157] At least the following matters are described in this specification: In parentheses, corresponding components in the above-mentioned embodiment are shown as an example, but the present invention is not limited to this.

[0158] (1) A vehicle temperature control system (vehicle temperature control system 10) mounted on a vehicle (vehicle V), the vehicle including a rotating electric machine (electric motor 20), a transmission device (transmission device 40), and a power conversion device (power conversion device 50) for controlling electric power supplied to the rotating electric machine.

[0159] in,

[0160] The vehicle temperature control system comprises:

[0161] A first temperature control circuit (first temperature control circuit 61 ), which is provided with a first pump (first pump 611 ) and for circulating a first temperature control medium (first temperature control medium TCM1 ) to control the temperature of the rotating electrical machine and the speed change device;

[0162] A second temperature control circuit (second temperature control circuit 62 ), which is provided with a second pump (second pump 621 ) and for circulating a second temperature control medium (second temperature control medium TCM2 ) to control the temperature of the power conversion device;

[0163] a heat exchanger (heat exchanger 63) for performing heat exchange between the first temperature control medium and the second temperature control medium;

[0164] a flow regulating valve (valve device 626) for regulating the flow of the second temperature regulating medium flowing in the heat exchanger; and

[0165] a control device (control device ECU) which controls the flow regulating valve,

[0166] The second temperature control circuit has:

[0167] A pressurized delivery flow path (pressurized delivery flow path 620a) provided with the second pump, a branch portion (branch portion 624) provided at one end of the pressurized delivery flow path, and a confluence portion (confluence portion 625) provided at the other end of the pressurized delivery flow path;

[0168] a first branch flow path (first branch flow path 620b1) provided with the power conversion device, wherein one end of the first branch flow path is connected to the branch portion, and the other end of the first branch flow path is connected to the confluence portion; and

[0169] A second branch flow path (second branch flow path 620b2) is provided with the heat exchanger and the flow regulating valve, one end of the second branch flow path is connected to the branch portion, the other end of the second branch flow path is connected to the confluence portion, and the second branch flow path is formed in parallel with the first branch flow path,

[0170] The pressurized transport flow path is provided with a radiator (radiator 622) for performing heat exchange between the second temperature control medium and external air.

[0171] The control device has:

[0172] A first temperature control medium temperature detection unit (first temperature control medium temperature detection unit 71 ) configured to detect the temperature of the first temperature control medium; and

[0173] A valve opening and closing control unit (valve opening and closing control unit 73) controls the opening and closing of the flow regulating valve,

[0174] When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature (predetermined temperature Tset1), the valve opening and closing control unit controls the flow rate regulating valve to be closed.

[0175] When the flow rate regulating valve is closed, the valve opening and closing control unit controls the flow rate regulating valve to open when the temperature of the first temperature regulating medium detected by the first temperature regulating medium temperature detection unit becomes equal to or higher than the predetermined temperature.

[0176] According to (1), when the rotating electrical machine needs to be cooled, the rotating electrical machine is cooled by the first temperature control medium, and when the rotating electrical machine does not need to be cooled, the temperature of the first temperature control medium is increased, thereby improving the fuel economy of the vehicle.

[0177] (2) The vehicle temperature control system according to (1), wherein:

[0178] The control device also has:

[0179] a vehicle speed detection unit (vehicle speed detection unit 74) for detecting the vehicle speed;

[0180] a slope angle detection unit (slope angle detection unit 75) that detects a slope angle of a road surface on which the vehicle is traveling; and

[0181] an uphill running determination unit (uphill running determination unit 76) for determining whether the vehicle is running uphill based on the detection values ​​of the vehicle speed detection unit and the slope angle detection unit,

[0182] Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, the valve opening and closing control unit controls the flow rate regulating valve to open when the uphill running determination unit determines that the vehicle is running uphill.

[0183] According to (2), even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, the rotating electric machine can be quickly cooled when the vehicle is traveling in which the rotating electric machine is more likely to generate heat than during normal travel.

[0184] (3) The vehicle temperature control system according to (1), wherein:

[0185] The control device further includes a slip determination unit (slip determination unit 77) for determining whether at least one wheel of the vehicle is spinning.

[0186] Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, the valve opening and closing control unit controls the flow regulating valve to open when the slip determination unit determines that at least one wheel of the vehicle is spinning.

[0187] According to (3), even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, the rotating electric machine can be quickly cooled when the vehicle is traveling in which the rotating electric machine is more likely to generate heat than during normal travel.

[0188] (4) The vehicle temperature control system according to (1), wherein:

[0189] The control device further includes a driving torque detection unit (driving torque detection unit 78) for detecting the driving torque of the vehicle.

[0190] Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detector is lower than the predetermined temperature, the valve opening and closing controller controls the flow rate regulating valve to open when the driving torque detected by the driving torque detector is equal to or greater than a predetermined value.

[0191] According to (4), even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, the rotating electrical machine can be quickly cooled when the vehicle is performing towing travel in which the rotating electrical machine is more likely to generate heat than during normal travel.

[0192] (5) A vehicle (vehicle V) comprising a rotating electrical machine (electric motor 20), a transmission device (transmission device 40), a power conversion device (power conversion device 50) for controlling power supplied to the rotating electrical machine, and a vehicle temperature control system (vehicle temperature control system 10),

[0193] in,

[0194] The vehicle temperature control system comprises:

[0195] A first temperature control circuit (first temperature control circuit 61 ), which is provided with a first pump (first pump 611 ) and for circulating a first temperature control medium (first temperature control medium TCM1 ) to control the temperature of the rotating electrical machine and the speed change device;

[0196] A second temperature control circuit (second temperature control circuit 62 ), which is provided with a second pump (second pump 621 ) and for circulating a second temperature control medium (second temperature control medium TCM2 ) to control the temperature of the power conversion device;

[0197] a heat exchanger (heat exchanger 63) for performing heat exchange between the first temperature control medium and the second temperature control medium;

[0198] a flow regulating valve (valve device 626) for regulating the flow of the second temperature regulating medium flowing in the heat exchanger; and

[0199] a control device (control device ECU) which controls the flow regulating valve,

[0200] The second temperature control circuit has:

[0201] A pressurized delivery flow path (pressurized delivery flow path 620a) provided with the second pump, a branch portion (branch portion 624) provided at one end of the pressurized delivery flow path, and a confluence portion (confluence portion 625) provided at the other end of the pressurized delivery flow path;

[0202] a first branch flow path (first branch flow path 620b1) provided with the power conversion device, wherein one end of the first branch flow path is connected to the branch portion, and the other end of the first branch flow path is connected to the confluence portion; and

[0203] A second branch flow path (second branch flow path 620b2) is provided with the heat exchanger and the flow regulating valve, one end of the second branch flow path is connected to the branch portion, the other end of the second branch flow path is connected to the confluence portion, and the second branch flow path is formed in parallel with the first branch flow path,

[0204] The pressurized transport flow path is provided with a radiator (radiator 622) for performing heat exchange between the second temperature control medium and external air.

[0205] The control device has:

[0206] A first temperature control medium temperature detection unit (first temperature control medium temperature detection unit 71 ) configured to detect the temperature of the first temperature control medium; and

[0207] A valve opening and closing control unit (valve opening and closing control unit 73) controls the opening and closing of the flow regulating valve,

[0208] When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature (predetermined temperature Tset1), the valve opening and closing control unit controls the flow rate regulating valve to be closed.

[0209] When the flow rate regulating valve is closed, the valve opening and closing control unit controls the flow rate regulating valve to open when the temperature of the first temperature regulating medium detected by the first temperature regulating medium temperature detection unit becomes equal to or higher than the predetermined temperature.

[0210] According to (5), when the rotating electrical machine needs to be cooled, the rotating electrical machine is cooled by the first temperature control medium, and when the rotating electrical machine does not need to be cooled, the temperature of the first temperature control medium is increased, thereby improving the fuel economy of the vehicle.

Claims

1. A vehicle temperature control system, mounted on a vehicle, the vehicle comprising a rotating electrical machine, a transmission device, and a power conversion device for controlling power supplied to the rotating electrical machine, in, The vehicle temperature control system comprises: A first temperature control circuit, which is provided with a first pump and is used for circulating a first temperature control medium to control the temperature of the rotating motor and the speed change device; A second temperature control circuit is provided with a second pump and is used for circulating a second temperature control medium to control the temperature of the power conversion device; a heat exchanger for performing heat exchange between the first temperature control medium and the second temperature control medium; a flow regulating valve for regulating the flow of the second temperature regulating medium flowing in the heat exchanger; and a control device for controlling the flow regulating valve, The second temperature control circuit has: a pressurized conveying flow path provided with the second pump, wherein a branch portion is provided at one end of the pressurized conveying flow path, and a confluence portion is provided at the other end of the pressurized conveying flow path; a first branch flow path, in which the power conversion device is provided, one end of the first branch flow path is connected to the branch portion, and the other end of the first branch flow path is connected to the confluence portion; as well as a second branch flow path, which is provided with the heat exchanger and the flow regulating valve, wherein one end of the second branch flow path is connected to the branch portion, the other end of the second branch flow path is connected to the confluence portion, and the second branch flow path is formed in parallel with the first branch flow path, A radiator for performing heat exchange between the second temperature control medium and external air is provided in the pressurized transport flow path. The control device has: A first temperature control medium temperature detection unit, which detects the temperature of the first temperature control medium; and a valve opening and closing control unit, which controls the opening and closing of the flow regulating valve, When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the valve opening and closing control unit controls the flow rate regulating valve to be closed. When the flow rate regulating valve is closed, the valve opening and closing control unit controls the flow rate regulating valve to open when the temperature of the first temperature regulating medium detected by the first temperature regulating medium temperature detection unit becomes equal to or higher than the predetermined temperature.

2. The vehicle temperature control system according to claim 1, wherein: The control device also has: a vehicle speed detection unit, which detects the vehicle speed; a slope angle detection unit for detecting a slope angle of a road surface on which the vehicle is traveling; as well as an uphill running determination unit for determining whether the vehicle is running uphill based on the detection values ​​of the vehicle speed detection unit and the slope angle detection unit, Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, the valve opening and closing control unit controls the flow rate regulating valve to open when the uphill running determination unit determines that the vehicle is running uphill.

3. The vehicle temperature control system according to claim 1, wherein: The control device further includes a slip determination unit for determining whether at least one wheel of the vehicle is spinning. Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than the predetermined temperature, the valve opening and closing control unit controls the flow regulating valve to open when the slip determination unit determines that at least one wheel of the vehicle is spinning.

4. The vehicle temperature control system according to claim 1, wherein: The control device further includes a driving torque detection unit for detecting a driving torque of the vehicle. Even if the temperature of the first temperature control medium detected by the first temperature control medium temperature detector is lower than the predetermined temperature, the valve opening and closing controller controls the flow rate regulating valve to open when the driving torque detected by the driving torque detector is equal to or greater than a predetermined value.

5. A vehicle comprising a rotating electrical machine, a transmission device, a power conversion device for controlling power supplied to the rotating electrical machine, and a vehicle temperature control system, in, The vehicle temperature control system comprises: A first temperature control circuit, which is provided with a first pump and is used for circulating a first temperature control medium to control the temperature of the rotating motor and the speed change device; A second temperature control circuit is provided with a second pump and is used for circulating a second temperature control medium to control the temperature of the power conversion device; a heat exchanger for performing heat exchange between the first temperature control medium and the second temperature control medium; a flow regulating valve for regulating the flow of the second temperature regulating medium flowing in the heat exchanger; and a control device for controlling the flow regulating valve, The second temperature control circuit has: a pressurized conveying flow path provided with the second pump, wherein a branch portion is provided at one end of the pressurized conveying flow path, and a confluence portion is provided at the other end of the pressurized conveying flow path; a first branch flow path, in which the power conversion device is provided, one end of the first branch flow path is connected to the branch portion, and the other end of the first branch flow path is connected to the confluence portion; as well as a second branch flow path, which is provided with the heat exchanger and the flow regulating valve, wherein one end of the second branch flow path is connected to the branch portion, the other end of the second branch flow path is connected to the confluence portion, and the second branch flow path is formed in parallel with the first branch flow path, A radiator for performing heat exchange between the second temperature control medium and external air is provided in the pressurized transport flow path. The control device has: A first temperature control medium temperature detection unit, which detects the temperature of the first temperature control medium; and a valve opening and closing control unit, which controls the opening and closing of the flow regulating valve, When the temperature of the first temperature control medium detected by the first temperature control medium temperature detection unit is lower than a predetermined temperature, the valve opening and closing control unit controls the flow rate regulating valve to be closed. When the flow rate regulating valve is closed, the valve opening and closing control unit controls the flow rate regulating valve to open when the temperature of the first temperature regulating medium detected by the first temperature regulating medium temperature detection unit becomes equal to or higher than the predetermined temperature.

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