Vehicle temperature control system

Abstract

A vehicle temperature regulation system capable of inhibiting backflow of a second temperature regulation medium from a first branch passage to a second branch passage. The vehicle temperature regulation system includes: a first temperature regulation circuit (61) in which a first temperature regulation medium (TCM1) circulates; a second temperature regulation circuit (62) in which a second temperature regulation medium (TCM2) circulates; and a heat exchanger (63) that exchanges heat between the first temperature regulation medium and the second temperature regulation medium. The second temperature regulation circuit has a pressure delivery passage (620a) having one end connected to a branch portion (624) and the other end connected to a merging portion (625), a first branch passage (620b1), and a second branch passage (620b2). A backflow inhibition portion (625a) that inhibits backflow of the second temperature regulation medium (TCM2) from the first branch passage (620b1) to the second branch passage (620b2) is formed in the merging portion (625).

Description

Technical Field

[0001] This invention relates to a vehicle temperature control system for electric vehicles and the like. Background Technology

[0002] In recent years, initiatives aimed at achieving a low-carbon or decarbonized society have become more active. In the field of vehicles, research and development related to electric vehicles have been carried out in order to reduce CO2 emissions and improve energy efficiency.

[0003] Typically, electric vehicles have a rotary motor and a power conversion device that controls the rotary motor. Since the rotary motor and power conversion device generate heat during operation, most electric vehicles equipped with a rotary motor and power conversion device are fitted with a vehicle temperature control system to regulate the temperature of the rotary motor and power conversion device.

[0004] For example, Patent Document 1 describes a vehicle temperature control system with a fluid conduit that can reduce the resistance of fluid flowing in a first branch flow path (main pipe) and improve the suction effect of fluid in a second branch flow path (secondary pipe).

[0005] For example, Patent Document 2 describes a vehicle temperature control system in which sufficient flow rate and velocity can be obtained in the second branch flow path (bypass path) even when the flow rate in the first branch flow path (main flow path) is relatively low.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2009-257347

[0009] Patent Document 2: Japanese Patent Application Publication No. 10-047056 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] In the vehicle temperature control system described in Patent Document 1, when the fluid flowing in the first branch flow path (main pipe) flows backward into the second branch flow path (secondary pipe), the flow control valve (air valve) may malfunction. Similarly, in the vehicle temperature control system described in Patent Document 2, when the fluid flowing in the first branch flow path (main pipe) flows backward into the second branch flow path (bypass pipe), the flow control device (plunger working device) may malfunction.

[0012] However, neither Patent Document 1 nor Patent Document 2 mentions a mechanism for suppressing the backflow of the temperature regulating medium from the first branch flow path to the second branch flow path.

[0013] The present invention provides a vehicle temperature control system capable of suppressing the backflow of temperature control medium from the first branch flow path to the second branch flow path.

[0014] Solution for solving the problem

[0015] This invention provides a vehicle temperature control system, which comprises:

[0016] The first temperature regulation circuit is equipped with a first pump and supplies a first temperature regulation medium for circulation to regulate the temperature of the first temperature-regulated device.

[0017] The second temperature regulation circuit is equipped with a second pump, which circulates the second temperature regulation medium to regulate the temperature of the second temperature-regulated device; and

[0018] A heat exchanger that performs heat exchange between a first temperature-regulating medium and a second temperature-regulating medium, wherein...

[0019] The second temperature regulation circuit includes:

[0020] Branching and confluence,

[0021] A pressure-feeding flow path is provided, which is equipped with the second pump. One end of the pressure-feeding flow path is connected to the branch section, and the other end is connected to the confluence section.

[0022] A first branch flow path is provided with a second temperature regulating device. One end of the first branch flow path is connected to the branch section, and the other end is connected to the confluence section.

[0023] The second branch flow path is equipped with the heat exchanger. One end of the second branch flow path is connected to the branch section, and the other end is connected to the confluence section.

[0024] A heat sink is provided in the pressure delivery path for heat exchange between the second temperature regulating medium and the external gas.

[0025] A flow regulating valve is provided in the second branch flow path to regulate the flow rate of the second temperature regulating medium flowing in the second branch flow path.

[0026] A backflow suppression section is formed in the confluence section to suppress the backflow of the second temperature regulating medium from the first branch flow path to the second branch flow path.

[0027] Invention Effects

[0028] According to the present invention, it is possible to suppress the backflow of the second temperature regulating medium from the first branch flow path to the second branch flow path. Attached Figure Description

[0029] Figure 1 This is a block diagram of a vehicle temperature control system according to one embodiment of the present invention.

[0030] Figure 2 It means Figure 1 A diagram of the area surrounding the flow control valve.

[0031] Figure 3 It means Figure 1 A diagram of the periphery of the first embodiment of the confluence section.

[0032] Figure 4 It means Figure 1 A diagram of the periphery of the second embodiment of the confluence section.

[0033] Figure 5 It means Figure 1 A diagram of the periphery of the third embodiment of the confluence section.

[0034] Figure 6 It means Figure 1 A diagram of the periphery of the fourth embodiment of the confluence section.

[0035] Figure 7 It means Figure 1 A diagram of the periphery of the fifth embodiment of the confluence section.

[0036] Explanation of reference numerals in the attached figures:

[0037] 10 Vehicle Temperature Control System

[0038] 20. Electric motor (first temperature regulating device)

[0039] 30 Generator (First temperature regulating device)

[0040] 40-speed transmission (first temperature regulating device)

[0041] 50 Power conversion device (second temperature regulating device)

[0042] 61 First Temperature Regulation Circuit

[0043] 611 First Pump

[0044] 62 Second Temperature Regulation Circuit

[0045] 620a pressure delivery path

[0046] 620b1 First Branch Flow Path

[0047] 620b2 Second Branch Flow Path

[0048] 621 Second Pump

[0049] 622 Radiator

[0050] 624 Branch

[0051] 625 Convergence Department

[0052] 625a Backflow Suppression Section

[0053] 625d peripheral wall

[0054] 625F Guide Wall

[0055] 625g throttling section

[0056] 625h1 first flow path

[0057] 625h2 Second Flow Path

[0058] 626 Valve Device (Flow Control Valve)

[0059] 626a Entrance

[0060] 626b Export Department

[0061] 626c valve internal flow path

[0062] 626d valve core component

[0063] 63 heat exchanger

[0064] TCM1 First Temperature Control Medium

[0065] TCM2 Second Temperature Control Medium

[0066] V vehicle. Detailed Implementation

[0067] Hereinafter, an embodiment of a vehicle equipped with the vehicle temperature regulation system of the present invention will be described based on the accompanying drawings. It should be noted that the drawings should be viewed in accordance with the orientation of the reference numerals.

[0068] [Overall structure of vehicle temperature control system]

[0069] like Figure 1 As shown, the vehicle temperature control system 10 of this embodiment is mounted on a vehicle V and includes an internal combustion engine (ICE), a control unit (ECU), an electric motor (20), a generator (30), a transmission device (40), a power conversion device (50), and a temperature control circuit (60).

[0070] The electric motor 20 is a rotary motor that outputs power to drive the vehicle V by means of electricity stored in an energy storage device (not shown) mounted on the vehicle V or by electricity generated by the generator 30. The electric motor 20 can also generate electricity using the kinetic energy of the drive wheels of the vehicle V when the vehicle V is braking, thereby charging the aforementioned energy storage device.

[0071] The generator 30 is a rotary electric motor that generates electricity using the power of an internal combustion engine (ICE). The generator 30 charges the aforementioned energy storage device or supplies power to the electric motor 20.

[0072] For example, the transmission device 40 is a device that moderates the power output from the electric motor 20 and transmits it to the drive wheels. The transmission device 40 is, for example, a gear-type power transmission device.

[0073] The power conversion device 50 includes: a power drive unit (PDU) 51, which converts the power output from the aforementioned energy storage device from direct current (DC) to alternating current (AC), and controls the input and output power of the motor 20 and the generator 30; and a voltage control unit (VCU), not shown, which boosts the power output from the aforementioned energy storage device as needed. The VCU can also step down the power generated by the motor 20 when the vehicle is under V-braking.

[0074] The temperature regulation circuit 60 includes: a first temperature regulation circuit 61, which circulates a non-conductive first temperature regulation medium TCM1 to regulate the temperature of the motor 20, generator 30, and transmission 40; a second temperature regulation circuit 62, which circulates a conductive second temperature regulation medium TCM2 to regulate the temperature of the power conversion device 50; and a heat exchanger 63, which exchanges heat between the first temperature regulation medium TCM1 and the second temperature regulation medium TCM2. The non-conductive first temperature regulation medium TCM1 is, for example, engine oil called automatic transmission fluid (ATF), which lubricates and regulates the temperature of the motor 20, generator 30, and transmission 40. The conductive second temperature regulation medium TCM2 is, for example, coolant called long-life coolant (LLC).

[0075] [Structure of the first temperature regulation loop]

[0076] A first pump 611 and a storage unit 612 are provided in the first temperature regulating circuit 61. The first pump 611 is a mechanical pump driven by the power of the internal combustion engine ICE and the rotational force of the axle of the vehicle V (not shown). The storage unit 612 stores the first temperature regulating medium TCM1 circulating in the first temperature regulating circuit 61. The storage unit 612 is, for example, an oil pan located at the bottom of the housing (not shown) that houses the electric motor 20, the generator 30, and the transmission device 40. The first temperature regulating circuit 61 has a branch 613. The first temperature regulating circuit 61 includes: a pressure flow path 610a, which is equipped with a first pump 611, the upstream end of which is connected to a storage section 612, and the downstream end of which is connected to a branch section 613 via the first pump 611; a first branch flow path 610b1, which is equipped with a motor 20 and a generator 30, the upstream end of which is connected to the branch section 613, and the downstream end of which is connected to the storage section 612 via the motor 20 and generator 30; and a second branch flow path 610b2, which is equipped with a speed change device 40, the upstream end of which is connected to the branch section 613, and the downstream end of which is connected to the storage section 612 via the speed change device 40. In the first temperature regulating circuit 61, the heat exchanger 63 is positioned upstream of the motor 20 and generator 30 in the first branch flow path 610b1.

[0077] Therefore, two flow paths are formed in parallel in the first temperature regulation circuit 61: a flow path in which the first temperature regulating medium TCM1, pressurized by the first pump 611, passes through the branch 613 via the first branch flow path 610b1, exchanges heat with the second temperature regulating medium TCM2 in the heat exchanger 63 and is cooled, is supplied to the motor 20 and the generator 30 to lubricate and regulate their temperature, and is then stored in the storage section 612; and a flow path in which the first temperature regulating medium TCM1, pressurized by the first pump 611, passes through the branch 613 via the second branch flow path 610b2, is supplied to the transmission device 40 to lubricate and regulate its temperature, and is then stored in the storage section 612. Furthermore, the first temperature regulating medium TCM1 stored in the storage section 612 flows through the pressurization flow path 610a and is supplied to the first pump 611, circulating within the first temperature regulation circuit 61.

[0078] In this embodiment, the first branch flow path 610b1 and the second branch flow path 610b2 are configured such that the flow rate of the first temperature regulating medium TCM1 flowing in the first branch flow path 610b1 is greater than the flow rate of the first temperature regulating medium TCM1 flowing in the second branch flow path 610b2.

[0079] A first temperature sensor 61a is provided in the first temperature regulation circuit 61 to detect the temperature of the first temperature regulating medium TCM1 circulating in the first temperature regulation circuit 61. In this embodiment, the first temperature sensor 61a is provided in the storage section 612, which is an oil pan, and detects the temperature of the first temperature regulating medium TCM1 stored in the storage section 612. The first temperature sensor 61a outputs the detected value of the temperature of the first temperature regulating medium TCM1 stored in the storage section 612 to the control device ECU.

[0080] The first temperature regulating circuit 61 also includes a pressure regulating circuit 610c. The upstream end of the pressure regulating circuit 610c is connected to the storage section 612, and the downstream end of the pressure regulating circuit 610c is connected to the pressure delivery path 610a at a position downstream of the first pump 611. The pressure regulating circuit 610c is equipped with a pressure regulating valve 619. The pressure regulating valve 619 can be a check valve or a solenoid valve such as a solenoid valve. When the hydraulic pressure of the first temperature regulating medium TCM1 pumped from the first pump 611 is above a predetermined upper limit pressure, the pressure regulating valve 619 enters the open state, and a portion of the first temperature regulating medium TCM1 pumped 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 path 610b1 and the second branch path 610b2 is maintained below the upper limit pressure.

[0081] In the first temperature regulating circuit 61, the temperature of the first temperature regulating medium TCM1 stored in the storage section 612 after cooling the motor 20, generator 30, and transmission device 40 is approximately 100°C. Therefore, the temperature of the first temperature regulating medium TCM1 supplied to the heat exchanger 63 is approximately 100°C.

[0082] [Structure of the Second Temperature Regulation Loop]

[0083] The second temperature regulating circuit 62 includes a second pump 621, a radiator 622, and a storage tank 623. The second pump 621 is, for example, an electric pump driven by electricity stored in the aforementioned energy storage device. The radiator 622, located at the front of the vehicle V, is a heat dissipation device that cools the second temperature regulating medium TCM2 by facilitating heat exchange between the second temperature regulating medium TCM2 and the external air through the airflow during vehicle V's movement. The storage tank 623 is a container for temporarily storing the second temperature regulating medium TCM2 circulating in the second temperature regulating circuit 62. Even if cavitation occurs in the second temperature regulating medium TCM2 circulating in the second temperature regulating circuit 62, the cavitation disappears because the second temperature regulating medium TCM2 circulating in the second temperature regulating circuit 62 is temporarily stored in the storage tank 623.

[0084] The second temperature regulating circuit 62 has a branch section 624 and a confluence section 625. The second temperature regulating circuit 62 has a pressure delivery path 620a, in which a storage tank 623, a second pump 621, and a radiator 622 are sequentially arranged from the upstream side. The upstream end of the pressure delivery path 620a is connected to the confluence section 625, and its downstream end is connected to the branch section 624 via the storage tank 623, the second pump 621, and the radiator 622. The second temperature regulating medium TCM2 stored in the storage tank 623 is pressurized by the second pump 621 through the pressure delivery path 620a and cooled by the radiator 622.

[0085] The second temperature regulating circuit 62 further includes: a first branch flow path 620b1, which is equipped with a power conversion device 50, the upstream end of which is connected to the branch portion 624, and the downstream end of which is connected to the confluence portion 625 via the power conversion device 50; and a second branch flow path 620b2, which is equipped with a heat exchanger 63, the upstream end of which is connected to the branch portion 624, and the downstream end of which is connected to the confluence portion 625 via the heat exchanger 63. In this embodiment, a valve device 626 is provided in the portion of the second branch flow path 620b2 upstream of the heat exchanger 63. In this embodiment, the valve device 626 is a solenoid 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 a control device ECU. The detailed structure of the valve device 626 will be described later.

[0086] Therefore, the second temperature-regulating medium TCM2, which is pressurized by the second pump 621 and cooled by the radiator 622 in the pressurization flow path 620a, branches into a first branch flow path 620b1 and a second branch flow path 620b2 at the branch section 624. The second temperature-regulating 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 pressurization flow path 620a at the confluence section 625. The second temperature-regulating medium TCM2 flowing in the second branch flow path 620b2 cools the first temperature-regulating medium TCM1 by exchanging heat with it in the heat exchanger 63, and merges with the first branch flow path 620b1 and the pressurization flow path 620a at the confluence section 625. The second temperature-regulating medium TCM2 flowing through the first branch flow path 620b1 and the second temperature-regulating medium TCM2 flowing through the second branch flow path 620b2 merge at the confluence section 625 and flow in the pressure delivery flow path 620a, where it is temporarily stored in the storage tank 623. Furthermore, the second temperature-regulating medium TCM2 stored in the storage tank 623 is supplied to the second pump 621 again through the pressure delivery flow path 620a, and the second temperature-regulating medium TCM2 circulates in the second temperature regulation circuit 62.

[0087] In this embodiment, the first branch flow path 620b1 and the second branch flow path 620b2 are configured such that the flow rate of the second temperature regulating medium TCM2 flowing in the first branch flow path 620b1 is greater than the flow rate of the second temperature regulating medium TCM2 flowing in the second branch flow path 620b2.

[0088] A second temperature sensor 62a is provided in the second temperature regulation loop 62 to detect the temperature of the second temperature regulating medium TCM2 circulating in the second temperature regulation loop 62. In this embodiment, the second temperature sensor 62a is provided in the pressure delivery path 620a between the radiator 622 and the branch 624 to detect the temperature of the second temperature regulating medium TCM2 discharged from the radiator 622. The second temperature sensor 62a outputs the detected temperature value of the second temperature regulating medium TCM2 discharged from the radiator 622 to the control device ECU.

[0089] In the second temperature regulation loop 62, the temperature of the second temperature regulation medium TCM2, cooled by the radiator 622, is approximately 40°C. The second temperature regulation medium TCM2 supplied to the heat exchanger 63 does not pass through the power conversion device 50, which is the temperature regulation device, so the temperature of the second temperature regulation medium TCM2 supplied to the heat exchanger 63 is approximately 40°C.

[0090] Structure of a heat exchanger

[0091] Heat exchanger 63 exchanges heat between a first temperature regulating medium TCM1 of approximately 100 °C and a second temperature regulating medium TCM2 of approximately 40 °C. Then, approximately 80 °C of the first temperature regulating medium TCM1 is discharged from heat exchanger 63 to the downstream side of the first branch flow path 610b1 of the first temperature regulating circuit 61, and approximately 70 °C of the second temperature regulating medium TCM2 is discharged to the downstream side of the second branch flow path 620b2 of the second temperature regulating circuit 62.

[0092] In this way, the first temperature regulating medium TCM1 is cooled in the heat exchanger 63, so the temperature regulating loop 60 can cool the first temperature regulating medium TCM1 without a heat sink for cooling the first temperature regulating medium TCM1. Therefore, the temperature regulating loop 60 can use a heat sink 622 to cool the first temperature regulating medium TCM1 flowing in the first temperature regulating loop 61 and the second temperature regulating medium TCM2 flowing in the second temperature regulating loop 62, thereby enabling the miniaturization of the temperature regulating loop 60.

[0093] [Structure of the control device]

[0094] 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 includes a heat exchanger fault detection unit 71 for detecting faults in the heat exchanger 63. The second pump 621 is equipped with a rotational speed sensor 621a that detects the rotational speed of the second pump 621. The rotational speed sensor 621a outputs the detected value of the rotational speed of the second pump 621 to the control unit ECU.

[0095] The heat exchanger fault detection unit 71 detects faults in the heat exchanger 63 based on the detected value of the rotational speed of the second pump 621 output from the rotational speed sensor 621a. Specifically, the heat exchanger fault detection unit 71 determines that a fault has occurred in the heat exchanger 63 when the detected value of the rotational speed of the second pump 621 output from the rotational speed sensor 621a changes by a predetermined value relative to the target rotational speed, thereby detecting a fault in the heat exchanger 63.

[0096] When the heat exchanger fault detection unit 71 detects a fault in the heat exchanger 63, the control unit ECU controls the valve device 626 to fully close the valve device 626 to cut off the flow of the second temperature regulating medium TCM2 in the second branch flow path 620b2.

[0097] When valve device 626 is fully closed, cutting off the flow of the second temperature regulating medium TCM2 in the second branch flow path 620b2, the second temperature regulating medium TCM2 is not supplied to heat exchanger 63. Therefore, when a fault is detected in heat exchanger 63, the second temperature regulating medium TCM2 is not supplied to heat exchanger 63. Thus, even if heat exchanger 63 fails and is damaged, the mixing of conductive second temperature regulating medium TCM2 into non-conductive first temperature regulating medium TCM1 caused by the second temperature regulating medium TCM2 flowing into the first temperature regulating circuit 61 in heat exchanger 63 can be reduced.

[0098] [Structure of the Valve Device]

[0099] Next, refer to Figure 2 The structure of valve device 626 is described.

[0100] like Figure 2 As shown, the valve device 626 includes: an inlet portion 626a for the inflow of the second temperature regulating medium TCM2; an outlet portion 626b for the discharge of the second temperature regulating medium TCM2; an internal flow path 626c extending from the inlet portion 626a to the outlet portion 626b; a valve core member 626d disposed in the internal flow path 626c and for opening and closing the internal flow path 626c; a force-applying member 626e for applying force to the valve core member 626d; and a solenoid portion (not shown) capable of generating electromagnetic force.

[0101] In this embodiment, the valve internal flow path 626c extends in a generally straight line, and the valve core member 626d is disposed near the inlet portion 626a. The valve core member 626d is disposed in a manner that allows it to slide along the inner wall surface 626c1 of the valve internal flow path 626c. The valve core member 626d is shaped to close the inlet portion 626a. In this embodiment, the valve core member 626d is disc-shaped. The valve core member 626d is attracted by the electromagnetic force generated by a solenoid portion (not shown). The force-applying member 626e is, for example, an elastic member such as a helical spring. One end of the force-applying member 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-applying member 626e is connected to the valve core member 626d. Furthermore, the force-applying member 626e applies force to the valve core member 626d in a direction away from the inlet portion 626a.

[0102] In the valve internal flow path 626c, a locking portion 626f is formed at a position closer to the outlet portion 626b than the valve core component 626d. The locking portion 626f is, for example, a protrusion that protrudes toward the center of the flow path 626c. The locking portion 626f can lock the valve core component 626d that slides along the inner wall surface 626c1 of the valve internal flow path 626c.

[0103] like Figure 2 As shown in (a), the valve device 626 enters the fully open state when the solenoid section (not shown) is in the open state and no electromagnetic force is generated. At this time, the valve core component 626d is subjected to an applied force by the force-applying component 626e in a direction away from the inlet 626a, and enters a state where it is locked in the locking part 626f.

[0104] like Figure 2 As shown in (b), when the solenoid section (not shown) generates electromagnetic force in the on state, the valve device 626 enters the fully closed state. At this time, the valve core component 626d is attracted toward the inlet 626a by the electromagnetic force generated by the solenoid section (not shown), and moves toward the inlet 626a against the applied force of the force-applying component 626e, thereby closing the inlet 626a.

[0105] Then, when the solenoid section (not shown) is switched back to the open state, causing the valve device 626 to switch to the fully open state, the valve core component 626d moves away from the inlet 626a by the combined force of the fluid pressure of the second temperature regulating medium TCM2 at the inlet 626a and the applied force of the force-applying component 626e. At this time, if the fluid pressure of the second temperature regulating medium TCM2 from the outlet 626b side toward the valve core component 626d is not greater than the combined force of the fluid pressure of the second temperature regulating medium TCM2 at the inlet 626a and the applied force of the force-applying component 626e, the valve device 626 can be switched to the fully open state. Furthermore, when the valve device 626 is fully closed, the pressure on the upstream side of the valve device 626, i.e. the inlet 626a side, increases, and the pressure on the downstream side of the valve device 626, i.e. the outlet 626b side, decreases. Therefore, it is not easy for the following state to occur: the fluid pressure of the second temperature regulating medium TCM2 from the outlet 626b side toward the valve core component 626d is greater than the resultant force of the fluid pressure of the second temperature regulating medium TCM2 at the inlet 626a and the applied force of the force-applying component 626e.

[0106] In this way, the valve device 626 is configured such that, when fully closed, the valve core member 626d moves toward the inlet portion 626a to close the inlet portion 626a, thereby preventing the valve device 626 from becoming stuck in the fully closed state. Furthermore, the force required by the force-applying member 626e to transition the valve device 626 from the fully closed state to the fully open state can be reduced, thus lowering the cost of the force-applying member 626e and consequently reducing the cost of the valve device 626.

[0107] [Structure and shape of the confluence section]

[0108] Next, the structure and shape of the merging section 625 will be described. The second temperature regulating medium TCM2 flowing in the first branch flow path 620b1 and the second temperature regulating medium TCM2 flowing in the second branch flow path 620b2 flow into the merging section 625 and merge there. Then, the merged second temperature regulating medium TCM2 flows into the pressure delivery flow path 620a.

[0109] When valve device 626 is fully closed, and the flow of the second temperature regulating medium TCM2 in the second branch flow path 620b2 is cut off, the second temperature regulating medium TCM2 flowing in from the first branch flow path 620b1 easily flows into the second branch flow path 620b2 and flows back in the second branch flow path 620b2. When the second temperature regulating medium TCM2 flowing in from the first branch flow path 620b1 flows back in the second branch flow path 620b2, the fluid pressure of the second temperature regulating medium TCM2 from the outlet 626b side toward the valve core component 626d in valve device 626 increases. Therefore, it is preferable to suppress the situation where the second temperature regulating medium TCM2 flowing from the first branch flow path 620b1 to the confluence section 625 flows into the second branch flow path 620b2 and flows back in the second branch flow path 620b2. Therefore, in this embodiment, a backflow suppression section 625a is formed in the confluence section 625 to suppress the backflow of the second temperature regulating medium TCM2 from the first branch flow path 620b1 to the second branch flow path 620b2.

[0110] Therefore, by suppressing the backflow of the second temperature regulating medium TCM2 from the first branch flow path 620b1 to the second branch flow path 620b2, the malfunction of the valve device 626 can be suppressed. More specifically, by suppressing the backflow suppression section 625a to prevent the second temperature regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 into the second branch flow path 620b2, the fluid pressure rise of the second temperature regulating medium TCM2 from the outlet section 626b towards the valve core member 626d can be suppressed, thus preventing the valve device 626 from becoming stuck in the fully closed state.

[0111] The following is for reference Figures 3 to 7 The first to fifth embodiments of the confluence section 625 including the backflow suppression section 625a will be described. Figures 3 to 7 The arrow shown indicates the flow direction of the second temperature regulating medium, TCM2. Additionally, in Figures 3 to 7 In the diagram, the front of the vehicle V is denoted as Fr, the rear as Rr, the top as U, and the bottom as D, showing the periphery of the merging section 625 when the vehicle temperature regulation system 10 is mounted on the vehicle V.

[0112] <First Embodiment>

[0113] like Figure 3As shown, the confluence section 625 includes: an upstream flow path 625b extending along the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the first branch flow path 620b1; and a downstream flow path 625c extending at approximately a right angle from the downstream end of the upstream flow path 625b. The upstream end of the upstream flow path 625b is connected to the downstream end of the first branch flow path 620b1. The downstream end of the downstream flow path 625c is connected to the upstream end of the pressure flow path 620a. Therefore, the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the first branch flow path 620b1 is the same as the flow direction of the second temperature-regulating medium TCM2 at the upstream flow path 625b of the confluence section 625.

[0114] The downstream end of the second branch flow path 620b2 is connected to the upstream flow path 625b of the confluence section 625. A connecting portion 625e is formed on the peripheral wall portion 625d of the confluence section 625, which connects to the downstream end of the second branch flow path 620b2. The connecting portion 625e is provided in the upstream flow path 625b of the confluence section 625. The second branch flow path 620b2 is connected to the confluence section 625 at an acute angle θ with the first branch flow path 620b1.

[0115] Therefore, the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 needs to be turned back by more than 90 degrees in order to flow into the second branch flow path 620b2. Thus, the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 is less likely to flow into the second branch flow path 620b2. This effectively prevents the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 from flowing into the second branch flow path 620b2.

[0116] Furthermore, relative to the imaginary line L1 extending along the flow direction of the second temperature regulating medium TCM2 through the flow path center of the upstream flow path 625b at the upstream end 625e1 of the connecting part 625e, the distance D12 from the imaginary line L1 to the downstream end 625e2 of the connecting part 625e is longer than the distance D11 from the imaginary line L1 to the upstream end 625e1 of the connecting part 625e.

[0117] Therefore, it is possible to prevent the second temperature regulating medium TCM2 flowing along the guide wall 625f in the upstream flow path 625b from contacting the downstream end 625e2 of the connection 625e and flowing into the second branch flow path 620b2.

[0118] The backflow suppression section 625a has a guide wall 625f that guides the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625. The guide wall 625f is formed such that, when viewed from the downstream end of the second branch flow path 620b2 in the flow direction of the second temperature-regulating medium TCM2, at least a portion of it overlaps with the flow path at the downstream end of the second branch flow path 620b2.

[0119] In this embodiment, the guide wall 625f extends from the upstream end 625e1 of the connection 625e along the flow direction of the second temperature regulating medium TCM2 at the upstream flow path 625b to the front of the downstream end 625e2 of the connection 625e.

[0120] As a result, at least a portion of the flow path at the downstream end of the second branch flow path 620b2 is covered by the guide wall 625f, thus suppressing the situation where the second temperature regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence portion 625 flows into the second branch flow path 620b2 and flows back in the second branch flow path 620b2.

[0121] In addition, the cross-sectional area of ​​the flow path at the end of the guide wall 625f that supplies the second temperature regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 is smaller than the cross-sectional area of ​​the flow path at the downstream end of the second branch flow path 620b2.

[0122] Therefore, the flow velocity of the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 increases and the pressure decreases at the end of the guide wall 625f due to the Venturi effect. Consequently, a negative pressure is generated at the end of the guide wall 625f, creating an attractive force in the direction in which the second temperature-regulating medium TCM2 flows from the second branch flow path 620b2 into the confluence section 625. This prevents the second temperature-regulating medium TCM2, which flows from the first branch flow path 620b1 into the confluence section 625, from flowing back into the second branch flow path 620b2.

[0123] The second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 flows along the peripheral wall 625d and guide wall 625f of the confluence section 625 in the upstream flow path 625b. A portion of the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 contacts the guide wall 625f and flows along the guide wall 625f, merging with the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 downstream of the end of the guide wall 625f. The remaining portion of the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 does not contact the guide wall 625f, but merges with the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 downstream of the end of the guide wall 625f. Furthermore, the confluence point P of the second temperature regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 and the second temperature regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 is located downstream of the end of the guide wall 625f.

[0124] Furthermore, the second temperature regulating medium TCM2, which merges at the confluence point P, flows from the upstream flow path 625b through the downstream flow path 625c, and from the confluence point 625 to the pressure delivery flow path 620a.

[0125] In addition, the vehicle temperature regulation system 10 is mounted on the vehicle V in such a way that the guide wall 625f tends to be downstream and extends upward.

[0126] In the event of cavitation in the second temperature regulation circuit 62, the cavitation flows upwards. Therefore, as the guide wall 625f extends downstream and downwards, cavitation tends to remain in the area where the guide wall 625f extends. In this embodiment, the vehicle temperature regulation system 10 is mounted on the vehicle V with the guide wall 625f extending downstream and upwards. Therefore, even if cavitation occurs in the second temperature regulation circuit 62, the cavitation tends to flow along the guide wall 625f, thus suppressing cavitation residue in the second temperature regulation circuit 62.

[0127] <Second Embodiment>

[0128] like Figure 4As shown, the confluence section 625 includes: an upstream flow path 625b extending along the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the first branch flow path 620b1; and a downstream flow path 625c extending at approximately a right angle from the downstream end of the upstream flow path 625b. The upstream end of the upstream flow path 625b is connected to the downstream end of the first branch flow path 620b1. The downstream end of the downstream flow path 625c is connected to the upstream end of the pressure flow path 620a. Therefore, the flow direction of the second temperature-regulating medium TCM2 in the downstream end of the first branch flow path 620b1 is the same as the flow direction of the second temperature-regulating medium TCM2 at the upstream flow path 625b of the confluence section 625.

[0129] The downstream end of the second branch flow path 620b2 is connected to the upstream flow path 625b of the confluence section 625. A connecting portion 625e is formed on the peripheral wall portion 625d of the confluence section 625, which connects to the downstream end of the second branch flow path 620b2. The connecting portion 625e is provided in the upstream flow path 625b of the confluence section 625. The second branch flow path 620b2 is connected to the confluence section 625 at an acute angle θ with the first branch flow path 620b1.

[0130] Therefore, the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 needs to be turned back by more than 90 degrees in order to flow into the second branch flow path 620b2. Thus, the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 is less likely to flow into the second branch flow path 620b2. This effectively prevents the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 from flowing into the second branch flow path 620b2.

[0131] Furthermore, relative to the imaginary line L2 extending along the flow direction of the second temperature regulating medium TCM2 through the flow path center of the upstream flow path 625b at the upstream end 625e1 of the connecting part 625e, the distance D22 from the imaginary line L2 to the downstream end 625e2 of the connecting part 625e is longer than the distance D21 from the imaginary line L2 to the upstream end 625e1 of the connecting part 625e.

[0132] Therefore, it is possible to prevent the second temperature regulating medium TCM2 flowing along the guide wall 625f in the upstream flow path 625b from contacting the downstream end 625e2 of the connection 625e and flowing into the second branch flow path 620b2.

[0133] The backflow suppression section 625a has a guide wall 625f that guides the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625. The guide wall 625f is formed such that, when viewed from the downstream end of the second branch flow path 620b2 in the flow direction of the second temperature-regulating medium TCM2, at least a portion of it overlaps with the flow path at the downstream end of the second branch flow path 620b2.

[0134] In this embodiment, the guide wall 625f extends from the upstream end 625e1 of the connection 625e along the flow direction of the second temperature regulating medium TCM2 at the upstream flow path 625b to the front of the downstream end 625e2 of the connection 625e.

[0135] As a result, at least a portion of the flow path at the downstream end of the second branch flow path 620b2 is covered by the guide wall 625f, thus suppressing the situation where the second temperature regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence portion 625 flows into the second branch flow path 620b2 and flows back in the second branch flow path 620b2.

[0136] In the confluence section 625, a throttling section 625g with a reduced flow path cross-sectional area is formed in the backflow suppression section 625a. In this embodiment, the throttling section 625g is formed in the upstream flow path 625b of the confluence section 625. Furthermore, a connecting portion 625e and a guide wall 625f are provided in the throttling section 625g. Moreover, the throttling section 625g extends from a position upstream of the connecting portion 625e and the guide wall 625f to a position downstream of the connecting portion 625e and the guide wall 625f.

[0137] Therefore, in the confluence section 625, a throttling section 625g is formed in the region of the confluence section P, which includes the second temperature regulating medium TCM2 flowing into the confluence section 625 from the first branch flow path 620b1 and the second temperature regulating medium TCM2 flowing into the confluence section 625 from the second branch flow path 620b2.

[0138] Furthermore, the cross-sectional area of ​​the flow path at the end of the guide wall 625f, which supplies the second temperature regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625, is smaller than the cross-sectional area of ​​the flow path at the downstream end of the second branch flow path 620b2.

[0139] Therefore, the flow velocity of the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 increases and the pressure decreases at the end of the guide wall 625f due to the Venturi effect. Consequently, a negative pressure is generated at the end of the guide wall 625f, creating an attractive force in the direction in which the second temperature-regulating medium TCM2 flows from the second branch flow path 620b2 into the confluence section 625. This prevents the second temperature-regulating medium TCM2, which flows from the first branch flow path 620b1 into the confluence section 625, from flowing back into the second branch flow path 620b2.

[0140] The second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 flows along the peripheral wall 625d and guide wall 625f of the confluence section 625 in the upstream flow path 625b. At this time, the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 experiences an increased flow velocity and decreased pressure in the throttling section 625g, where the cross-sectional area of ​​the flow path is reduced, due to the Venturi effect. On the other hand, a portion of the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 contacts the guide wall 625f and flows along the guide wall 625f, merging with the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 on the downstream side of the end of the guide wall 625f. The remaining portion of the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 does not contact the guide wall 625f, but merges with the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 on the downstream side of the end of the guide wall 625f. Furthermore, the confluence point P of the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 and the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 is located downstream of the end of the guide wall 625f and is located in the throttling section 625g.

[0141] The second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 experiences an increased velocity and increased straightness at the throttling section 625g, where the cross-sectional area of ​​the flow path is reduced, due to the Venturi effect. This makes the flow direction less prone to bending, thus suppressing the situation where the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 flows into the second branch flow path 620b2 and flows backward in the second branch flow path 620b2.

[0142] Furthermore, the second temperature regulating medium TCM2, which flows at the confluence point P, flows through the throttling section 625g, from the upstream flow path 625b through the downstream flow path 625c, and from the confluence point 625 to the pressure delivery flow path 620a.

[0143] In addition, the vehicle temperature regulation system 10 is mounted on the vehicle V in such a way that the guide wall 625f tends to be downstream and extends upward.

[0144] In the event of cavitation in the second temperature regulation circuit 62, the cavitation flows upwards. Therefore, as the guide wall 625f extends downstream and downwards, cavitation tends to remain in the area where the guide wall 625f extends. In this embodiment, the vehicle temperature regulation system 10 is mounted on the vehicle V with the guide wall 625f extending downstream and upwards. Therefore, even if cavitation occurs in the second temperature regulation circuit 62, the cavitation tends to flow along the guide wall 625f, thus suppressing cavitation residue in the second temperature regulation circuit 62.

[0145] <Third Embodiment>

[0146] like Figure 5 As shown, the confluence section 625 includes: an upstream flow path 625b extending along the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the first branch flow path 620b1; and a downstream flow path 625c extending at approximately a right angle from the downstream end of the upstream flow path 625b. The upstream end of the upstream flow path 625b is connected to the downstream end of the first branch flow path 620b1. The downstream end of the downstream flow path 625c is connected to the upstream end of the pressure flow path 620a. Therefore, the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the first branch flow path 620b1 is the same as the flow direction of the second temperature-regulating medium TCM2 at the upstream flow path 625b of the confluence section 625.

[0147] The downstream end of the second branch flow path 620b2 is connected to the upstream flow path 625b of the confluence section 625. A connecting portion 625e is formed on the peripheral wall portion 625d of the confluence section 625, which connects to the downstream end of the second branch flow path 620b2. The connecting portion 625e is provided in the upstream flow path 625b of the confluence section 625. The second branch flow path 620b2 is connected to the confluence section 625 at an angle θ that is approximately right-angled with the first branch flow path 620b1.

[0148] Furthermore, relative to the imaginary line L3 extending along the flow direction of the second temperature regulating medium TCM2 through the flow center of the upstream flow path 625b at the upstream end 625e1 of the connecting part 625e, the distance D32 from the imaginary line L3 to the downstream end 625e2 of the connecting part 625e is longer than the distance D31 from the imaginary line L3 to the upstream end 625e1 of the connecting part 625e.

[0149] The backflow suppression section 625a has a guide wall 625f that guides the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625. The guide wall 625f is formed such that, when viewed from the downstream end of the second branch flow path 620b2 in the flow direction of the second temperature-regulating medium TCM2, at least a portion of it overlaps with the flow path at the downstream end of the second branch flow path 620b2.

[0150] In this embodiment, the guide wall 625f extends from the upstream end 625e1 of the connection 625e along the flow direction of the second temperature regulating medium TCM2 at the upstream flow path 625b to a position downstream of the downstream end 625e2 of the connection 625e.

[0151] Therefore, at least a portion of the flow path at the downstream end of the second branch flow path 620b2 is covered by the guide wall 625f, thus suppressing the situation where the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence portion 625 flows back into the second branch flow path 620b2. In particular, in this embodiment, the guide wall 625f extends from the upstream end of the connection portion 625e along the flow direction of the second temperature-regulating medium TCM2 at the upstream flow path 625b to a position further downstream than the downstream end of the connection portion 625e. Therefore, when viewed from the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the second branch flow path 620b2, the entire flow path at the downstream end of the second branch flow path 620b2 is covered by the guide wall 625f. Therefore, it is possible to further suppress the situation where the second temperature regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 flows into the second branch flow path 620b2 and flows back in the second branch flow path 620b2.

[0152] The second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 flows along the peripheral wall 625d and guide wall 625f of the confluence section 625 in the upstream flow path 625b. The second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 contacts the guide wall 625f and flows along the guide wall 625f, merging with the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 on the downstream side of the end of the guide wall 625f. Furthermore, the merging point P of the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 and the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 is located downstream of the end of the guide wall 625f, extending to a position downstream of the end of the connecting section 625e.

[0153] Furthermore, the cross-sectional area of ​​the flow path at the end of the guide wall 625f, which supplies the second temperature regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625, is smaller than the cross-sectional area of ​​the flow path at the downstream end of the second branch flow path 620b2.

[0154] Therefore, the flow velocity of the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 increases and the pressure decreases at the end of the guide wall 625f due to the Venturi effect. Consequently, a negative pressure is generated at the end of the guide wall 625f, creating an attractive force in the direction in which the second temperature-regulating medium TCM2 flows from the second branch flow path 620b2 into the confluence section 625. This prevents the second temperature-regulating medium TCM2, which flows from the first branch flow path 620b1 into the confluence section 625, from flowing back into the second branch flow path 620b2.

[0155] Furthermore, the second temperature regulating medium TCM2, which merges at the confluence point P, flows from the upstream flow path 625b through the downstream flow path 625c, and from the confluence point 625 to the pressure delivery flow path 620a.

[0156] In addition, the vehicle temperature regulation system 10 is mounted on the vehicle V in such a way that the guide wall 625f tends to be downstream and extends upward.

[0157] In the event of cavitation in the second temperature regulation circuit 62, the cavitation flows upwards. Therefore, as the guide wall 625f extends downstream and downwards, cavitation tends to remain in the area where the guide wall 625f extends. In this embodiment, the vehicle temperature regulation system 10 is mounted on the vehicle V with the guide wall 625f extending downstream and upwards. Therefore, even if cavitation occurs in the second temperature regulation circuit 62, the cavitation tends to flow along the guide wall 625f, thus suppressing cavitation residue in the second temperature regulation circuit 62.

[0158] <Fourth Embodiment>

[0159] like Figure 6As shown, the confluence section 625 includes: an upstream flow path 625b extending along the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the first branch flow path 620b1; and a downstream flow path 625c extending at approximately a right angle from the downstream end of the upstream flow path 625b. The upstream end of the upstream flow path 625b is connected to the downstream end of the first branch flow path 620b1. The downstream end of the downstream flow path 625c is connected to the upstream end of the pressure flow path 620a. Therefore, the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the first branch flow path 620b1 is the same as the flow direction of the second temperature-regulating medium TCM2 at the upstream flow path 625b of the confluence section 625.

[0160] The downstream end of the second branch flow path 620b2 is connected to the upstream flow path 625b of the confluence section 625. A connecting portion 625e is formed on the peripheral wall portion 625d of the confluence section 625, which connects to the downstream end of the second branch flow path 620b2. The connecting portion 625e is provided in the upstream flow path 625b of the confluence section 625. The second branch flow path 620b2 is connected to the confluence section 625 at an angle θ approximately right-angled with the first branch flow path 620b1.

[0161] Furthermore, relative to the imaginary line L4 extending along the flow direction of the second temperature regulating medium TCM2 through the flow path center of the upstream flow path 625b at the upstream end 625e1 of the connecting part 625e, the distance D42 from the imaginary line L4 to the downstream end 625e2 of the connecting part 625e is longer than the distance D41 from the imaginary line L4 to the upstream end 625e1 of the connecting part 625e.

[0162] The backflow suppression section 625a has a guide wall 625f that guides the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625. The guide wall 625f is formed such that, when viewed from the downstream end of the second branch flow path 620b2 in the flow direction of the second temperature-regulating medium TCM2, at least a portion of it overlaps with the flow path at the downstream end of the second branch flow path 620b2.

[0163] In this embodiment, the guide wall 625f extends from the upstream end of the connection portion 625e along the flow direction of the second temperature regulating medium TCM2 at the upstream flow path 625b to a position downstream of the downstream end of the connection portion 625e, and bends approximately perpendicularly toward the downstream flow path 625c in parallel with the peripheral wall portion 625d of the confluence portion 625, extending to the downstream flow path 625c.

[0164] Therefore, at least a portion of the flow path at the downstream end of the second branch flow path 620b2 is covered by the guide wall 625f, thus suppressing the situation where the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence portion 625 flows back into the second branch flow path 620b2. In particular, in this embodiment, the guide wall 625f extends from the upstream end of the connection portion 625e along the flow direction of the second temperature-regulating medium TCM2 at the upstream flow path 625b to a position further downstream than the downstream end of the connection portion 625e. Therefore, when viewed from the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the second branch flow path 620b2, the entire flow path at the downstream end of the second branch flow path 620b2 is covered by the guide wall 625f. Therefore, it is possible to further suppress the situation where the second temperature regulating medium TCM2, which flows from the first branch flow path 620b1 into the confluence section 625, flows into the second branch flow path 620b2 and flows back in the second branch flow path 620b2.

[0165] The confluence section 625 includes: a first flow path 625h1, which is surrounded by a peripheral wall portion 625d and a guide wall 625f of the confluence section 625, for the flow of a second temperature-regulating medium TCM2 flowing from a first branch flow path 620b1 into the confluence section 625; and a second flow path 625h2, which is also surrounded by a peripheral wall portion 625d and a guide wall 625f of the confluence section 625, for the flow of a second temperature-regulating medium TCM2 flowing from a second branch flow path 620b2 into the confluence section 625. Furthermore, the first flow path 625h1 and the second flow path 625h2 are configured such that the second temperature-regulating medium TCM2 flowing in the first flow path 625h1 and the second temperature-regulating medium TCM2 flowing in the second flow path 625h2 flow in parallel.

[0166] Therefore, the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 needs to flow from the first flow path 625h1 into the second flow path 625h2 in order to flow into the second branch flow path 620b2. However, this requires a turnback of approximately 180 degrees, making it difficult for the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 to flow into the second branch flow path 620b2. Thus, it is possible to suppress the flow of the second temperature-regulating medium TCM2 from the first branch flow path 620b1 into the confluence section 625 into the second branch flow path 620b2.

[0167] Furthermore, the downstream portion of the second flow path 625h2, which is surrounded by the peripheral wall portion 625d of the confluence portion 625 and the guide wall 625f, is formed such that its flow path cross-sectional area decreases as it approaches the end of the guide wall 625f.

[0168] In addition, the flow path cross-sectional area at the end of the guide wall 625f, i.e. the flow path cross-sectional area at the downstream end of the second flow path 625h2, which is supplied to the second temperature regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625, is smaller than the flow path cross-sectional area at the downstream end of the second branch flow path 620b2.

[0169] Therefore, the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 experiences an increased flow velocity and decreased pressure at the downstream end of the second flow path 625h2, i.e., at the end of the guide wall 625f, due to the Venturi effect. Consequently, a negative pressure is generated at the end of the guide wall 625f, creating an attractive force in the direction of the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625. This prevents the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 from flowing back into the second branch flow path 620b2.

[0170] At the confluence section 625, the second temperature regulating medium TCM2 flowing into the confluence section 625 from the second branch flow path 620b2 flows through the second flow path 625h2 and merges with the second temperature regulating medium TCM2 flowing from the first branch flow path 620b1 through the first flow path 625h1 and out of the first flow path 625h1 on the downstream side of the end of the guide wall 625f.

[0171] Therefore, in this embodiment, the merging point P of the second temperature regulating medium TCM2 flowing in from the first branch flow path 620b1 and the second temperature regulating medium TCM2 flowing in from the second branch flow path 620b2 is located downstream of the end of the guide wall 625f and is located in the downstream flow path 625c.

[0172] Furthermore, the second temperature regulating medium TCM2, after merging at the confluence point P, flows through the downstream flow path 625c and from the confluence point 625 to the pressure delivery flow path 620a.

[0173] In addition, the vehicle temperature regulation system 10 is mounted on the vehicle V in such a way that the guide wall 625f tends to be downstream and extends upward.

[0174] In the event of cavitation in the second temperature regulation circuit 62, the cavitation flows upwards. Therefore, as the guide wall 625f extends downstream and downwards, cavitation tends to remain in the area where the guide wall 625f extends. In this embodiment, the vehicle temperature regulation system 10 is mounted on the vehicle V with the guide wall 625f extending downstream and upwards. Therefore, even if cavitation occurs in the second temperature regulation circuit 62, the cavitation tends to flow along the guide wall 625f, thus suppressing cavitation residue in the second temperature regulation circuit 62.

[0175] <Fifth Embodiment>

[0176] like Figure 7 As shown, the confluence section 625 includes: an upstream flow path 625b extending along the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the first branch flow path 620b1; and a downstream flow path 625c extending at approximately a right angle from the downstream end of the upstream flow path 625b. The upstream end of the upstream flow path 625b is connected to the downstream end of the first branch flow path 620b1. The downstream end of the downstream flow path 625c is connected to the upstream end of the pressure flow path 620a. Therefore, the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the first branch flow path 620b1 is the same as the flow direction of the second temperature-regulating medium TCM2 at the upstream flow path 625b of the confluence section 625.

[0177] The downstream end of the second branch flow path 620b2 is connected to the upstream flow path 625b of the confluence section 625. Therefore, a connecting portion 625e is formed in the upstream flow path 625b of the confluence section 625 to connect to the downstream end of the second branch flow path 620b2. The second branch flow path 620b2 is connected to the confluence section 625 at an angle θ approximately right-angled with the first branch flow path 620b1.

[0178] The backflow suppression section 625a has a guide wall 625f that guides the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 and the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625. The guide wall 625f is formed in a tubular shape, extending from the wall portion of the first branch flow path 620b1 into the interior of the confluence section 625. Furthermore, a first flow path 625h1 surrounded by the tubular guide wall 625f and an annular second flow path 625h2 surrounded by the outer peripheral surface of the tubular guide wall 625f and the peripheral wall portion 625d of the confluence section 625 are formed in the confluence section 625. Therefore, the first flow path 625h1 and the second flow path 625h2 are formed such that the second temperature-regulating medium TCM2 flowing in the first flow path 625h1 and the second temperature-regulating medium TCM2 flowing in the second flow path 625h2 flow in parallel.

[0179] The second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 needs to flow from the first flow path 625h1 into the second flow path 625h2 in order to flow into the second branch flow path 620b2. However, this requires a turnback of approximately 180 degrees. Therefore, the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 is less likely to flow into the second branch flow path 620b2. Thus, it is possible to suppress the flow of the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 into the second branch flow path 620b2.

[0180] Furthermore, the guide wall 625f is formed such that, when viewed from the flow direction of the second temperature regulating medium TCM2 at the downstream end of the second branch flow path 620b2, at least a portion of it overlaps with the flow path at the downstream end of the second branch flow path 620b2.

[0181] In this embodiment, when viewed from the flow direction of the second temperature regulating medium TCM2 at the downstream end of the second branch flow path 620b2, the guide wall 625f extends from a position upstream of the upstream end 625e1 of the connecting portion 625e to a position downstream of the downstream end 625e2 of the connecting portion 625e.

[0182] Therefore, at least a portion of the flow path at the downstream end of the second branch flow path 620b2 is covered by the guide wall 625f, thus suppressing the situation where the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence portion 625 flows into the second branch flow path 620b2 and then flows back into the second branch flow path 620b2. In particular, in this embodiment, when viewed from the flow direction of the second temperature-regulating medium TCM2 at the downstream end of the second branch flow path 620b2, the entire flow path at the downstream end of the second branch flow path 620b2 is covered by the guide wall 625f. Therefore, it is possible to further suppress the situation where the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence portion 625 flows into the second branch flow path 620b2 and then flows back into the second branch flow path 620b2.

[0183] The second temperature-regulating medium TCM2, flowing from the first branch flow path 620b1 into the confluence section 625, flows in the confluence section 625 within the first flow path 625h1, which is surrounded by a tubular guide wall 625f. The downstream portion of the tubular guide wall 625f becomes a tapered shape with a tapered tip, such that the cross-sectional area of ​​the first flow path 625h1 decreases as it approaches the end of the guide wall 625f.

[0184] Therefore, the second temperature regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 flows in the first flow path 625h1 surrounded by the tubular guide wall 625f. In the downstream part of the guide wall 625f, which becomes a tapered cone shape at the front end, the flow velocity increases and the pressure decreases due to the Venturi effect.

[0185] At the confluence section 625, the second temperature regulating medium TCM2 flowing into the confluence section 625 from the second branch flow path 620b2 flows through the second flow path 625h2 and merges with the second temperature regulating medium TCM2 flowing from the first branch flow path 620b1 through the first flow path 625h1 and out of the first flow path 625h1 on the downstream side of the end of the guide wall 625f.

[0186] Therefore, in this embodiment, the confluence point P where the second temperature regulating medium TCM2 flowing in from the first branch flow path 620b1 and the second temperature regulating medium TCM2 flowing in from the second branch flow path 620b2 merge is located downstream of the end of the tubular guide wall 625f.

[0187] At this time, at the end of the first flow path 625h1, the flow velocity of the second temperature-regulating medium TCM2 flowing in the first flow path 625h1 increases, and its straightness increases, making it less prone to bending in the flow direction. Therefore, it is possible to suppress the situation where the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 flows into the second branch flow path 620b2 and flows back in the second branch flow path 620b2. Moreover, due to the Venturi effect, a negative pressure is generated in the downstream portion of the guide wall 625f, generating an attractive force in the direction in which the second temperature-regulating medium TCM2 flows from the second branch flow path 620b2 into the confluence section 625. As a result, it is possible to further suppress the situation where the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 flows into the second branch flow path 620b2 and flows back in the second branch flow path 620b2.

[0188] Furthermore, in the confluence section 625, a throttling section 625g with a reduced flow path cross-sectional area is formed in the backflow suppression section 625a. In this embodiment, the throttling section 625g is formed in the upstream flow path 625b of the confluence section 625. Moreover, the throttling section 625g is formed at a position downstream of the end of the guide wall 625f. Therefore, in the confluence section 625, the throttling section 625g is formed at a position downstream of the confluence point P of the second temperature regulating medium TCM2 flowing into the confluence section 625 from the first branch flow path 620b1 and the second temperature regulating medium TCM2 flowing into the confluence section 625 from the second branch flow path 620b2.

[0189] The second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence section 625 merges with the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence section 625 at the confluence section P, and flows in the throttling section 625g. At this time, the second temperature-regulating medium TCM2 in the throttling section 625g, where the flow path cross-sectional area is reduced, experiences an increase in flow velocity and a decrease in pressure due to the Venturi effect.

[0190] Therefore, the second temperature-regulating medium TCM2, after merging at the confluence point P, experiences an increased flow velocity and decreased pressure in the throttling section 625g, where the flow path cross-sectional area is reduced, due to the Venturi effect. Consequently, a negative pressure is generated in the throttling section 625g due to the Venturi effect, creating an attractive force towards the flow into the throttling section 625g for both the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence point 625 and the second temperature-regulating medium TCM2 flowing from the second branch flow path 620b2 into the confluence point 625. This prevents the second temperature-regulating medium TCM2 flowing from the first branch flow path 620b1 into the confluence point 625 from flowing back into the second branch flow path 620b2.

[0191] Furthermore, the second temperature regulating medium TCM2, which flows through the throttling section 625g, flows from the upstream side flow path 625b through the downstream side flow path 625c, and from the confluence section 625 to the pressure delivery flow path 620a.

[0192] In addition, the vehicle temperature regulation system 10 is mounted on the vehicle V in such a way that the guide wall 625f tends to be downstream and extends upward.

[0193] In the event of cavitation in the second temperature regulation circuit 62, the cavitation flows upwards. Therefore, as the guide wall 625f extends downstream and downwards, cavitation tends to remain in the area where the guide wall 625f extends. In this embodiment, the vehicle temperature regulation system 10 is mounted on the vehicle V with the guide wall 625f extending downstream and upwards. Therefore, even if cavitation occurs in the second temperature regulation circuit 62, the cavitation tends to flow along the guide wall 625f, thus suppressing cavitation residue in the second temperature regulation circuit 62.

[0194] It should be noted that, in this specification, the structure and shape of the merging section 625 are illustrated and described in the first to fifth embodiments in order to make the description concise and clear. However, the structure and shape of the merging section 625 may be combined with the structure and shape of the merging section 625 shown in the first to fifth embodiments, or may be all of them.

[0195] The present invention has been described above with reference to the accompanying drawings, but the present invention is not limited to this embodiment. It is obvious that those skilled in the art will conceive of various modifications or alterations within the scope of the technical solution described, and it should be understood that these modifications and alterations also fall within the technical scope of the present invention. Furthermore, the constituent elements in the above embodiments can be arbitrarily combined without departing from the spirit of the invention.

[0196] For example, in this embodiment, the first temperature regulating circuit 61 regulates the temperature of the motor 20, the generator 30, and the transmission device 40. However, the device whose temperature is being regulated by the first temperature regulating circuit 61 may not be the motor 20, the generator 30, or the transmission device 40; it may be any device that requires temperature regulation. Furthermore, the first temperature regulating medium TCM1 circulating in the first temperature regulating circuit 61 may also be conductive depending on the device whose temperature is being regulated by the first temperature regulating circuit 61.

[0197] Furthermore, for example, the second temperature regulation loop 62 of this embodiment regulates the temperature of the power conversion device 50, but the device whose temperature is regulated by the second temperature regulation loop 62 may not be the power conversion device 50, but any device that requires temperature regulation. Moreover, the second temperature regulation medium TCM2 circulating in the second temperature regulation loop 62 may be non-conductive depending on the device whose temperature is regulated by the second temperature regulation loop 62.

[0198] Additionally, for example, in this embodiment, the valve core component 626d has a disc shape, but the valve core component 626d may also have any shape capable of closing the inlet portion 626a.

[0199] In addition, for example, in this embodiment, the vehicle temperature control system 10 is mounted on the vehicle V in such a way that the second temperature control medium TCM2 flows rearward in the confluence section 625. However, the vehicle temperature control system 10 can also be mounted on the vehicle V in such a way that the second temperature control medium TCM2 flows forward in the confluence section 625, or it can be mounted on the vehicle V in such a way that the second temperature control medium TCM2 flows left and right in the confluence section 625.

[0200] At least the following items are described in this specification. The components, etc., corresponding to the described embodiments are shown in parentheses as examples, but the invention is not limited thereto.

[0201] (1) A vehicle temperature control system (vehicle temperature control system 10), comprising:

[0202] The first temperature regulation circuit (first temperature regulation circuit 61) is equipped with a first pump (first pump 611) and supplies a first temperature regulation medium (first temperature regulation medium TCM1) to circulate for temperature regulation of the first temperature-controlled device (motor 20, generator 30, speed change device 40).

[0203] The second temperature regulation loop (second temperature regulation loop 62) is equipped with a second pump (second pump 621) and circulates a second temperature regulation medium (second temperature regulation medium TCM2) to regulate the temperature of the second temperature-controlled device (power conversion device 50); and

[0204] A heat exchanger (heat exchanger 63) performs heat exchange between the first temperature regulating medium and the second temperature regulating medium, wherein...

[0205] The second temperature regulation circuit includes:

[0206] Branch section (branch section 624) and confluence section (confluence section 625);

[0207] A pressure conveying flow path (pressure conveying flow path 620a) is provided with a second pump, one end of which is connected to the branch section and the other end is connected to the confluence section;

[0208] The first branch flow path (first branch flow path 620b1) is provided with the second temperature regulating device. One end of the first branch flow path is connected to the branch section, and the other end is connected to the confluence section.

[0209] The second branch flow path (second branch flow path 620b2) is provided with the heat exchanger, one end of the second branch flow path is connected to the branch section, and the other end is connected to the confluence section;

[0210] A radiator (radiator 622) is provided in the pressure delivery path for heat exchange between the second temperature regulating medium and the external gas.

[0211] A flow regulating valve (valve device 626) is provided in the second branch flow path to regulate the flow rate of the second temperature regulating medium flowing in the second branch flow path.

[0212] A backflow suppression section (backflow suppression section 625a) is formed in the confluence section to suppress the backflow of the second temperature regulating medium from the first branch flow path to the second branch flow path.

[0213] According to (1), the backflow suppression section can suppress the backflow of the second temperature regulating medium from the first branch flow path to the second branch flow path.

[0214] (2) The vehicle temperature control system according to (1), wherein,

[0215] The flow regulating valve

[0216] It has an inlet (inlet 626a) for the second temperature regulating medium to flow in, an outlet (outlet 626b) for the second temperature regulating medium to discharge out, an internal flow path (internal flow path 626c) extending from the inlet to the outlet, and a valve core component (valve core component 626d) disposed in the internal flow path and for opening and closing the internal flow path.

[0217] The flow regulating valve is configured such that, when fully closed, the valve core component moves toward the inlet to seal the inlet.

[0218] According to (2), the flow control valve is configured such that when fully closed, the valve core component moves toward the inlet to close the inlet, thus preventing the flow control valve from sticking in the fully closed state.

[0219] (3) The vehicle temperature control system according to (1) or (2), wherein,

[0220] The backflow suppression section has a guide wall (guide wall 625f) that guides the second temperature regulating medium flowing from the first branch flow path into the confluence section and the second temperature regulating medium flowing from the second branch flow path into the confluence section.

[0221] The guide wall is formed such that, when viewed from the flow direction of the second temperature regulating medium at the other end of the second branch flow path, at least a portion of the guide wall overlaps with the flow path at the other end of the second branch flow path.

[0222] According to (3), at least a portion of the flow path at the other end of the second branch flow path is covered by a guide wall, thus suppressing the situation where the second temperature-regulating medium flowing from the first branch flow path into the confluence section flows into the second branch flow path and flows back in the second branch flow path.

[0223] (4) The vehicle temperature control system according to (3), wherein,

[0224] The vehicle temperature control system is mounted on the vehicle (vehicle V) with the guide wall extending downstream and upward.

[0225] According to (4), the vehicle temperature regulation system is mounted on the vehicle with the guide wall extending downward and upward. Therefore, even if cavitation occurs in the second temperature regulation circuit, the cavitation can easily flow along the guide wall and suppress cavitation residue in the second temperature regulation circuit.

[0226] (5) The vehicle temperature control system according to (3) or (4), wherein,

[0227] The flow path cross-sectional area at the end of the guide wall for the flow of the second temperature-regulating medium flowing from the second branch flow path into the confluence section is smaller than the flow path cross-sectional area at the other end of the second branch flow path.

[0228] According to (5), the second temperature-regulating medium flowing from the second branch flow path into the confluence section experiences increased velocity and decreased pressure at the end of the guide wall due to the Venturi effect. Therefore, a negative pressure is generated at the end of the guide wall, creating an attractive force in the direction of the second temperature-regulating medium flowing from the second branch flow path into the confluence section. This effectively prevents the second temperature-regulating medium flowing from the first branch flow path into the confluence section from flowing back into the second branch flow path.

[0229] (6) The vehicle temperature control system according to any one of (3) to (5), wherein,

[0230] In the confluence section, a first flow path (first flow path 625h1) for the second temperature-regulating medium flowing from the first branch flow path into the confluence section and a second flow path (second flow path 625h2) for the second temperature-regulating medium flowing from the second branch flow path into the confluence section are formed by the peripheral wall portion (peripheral wall portion 625d) and the guide wall.

[0231] The first flow path and the second flow path are configured such that the second temperature regulating medium flowing in the first flow path and the second temperature regulating medium flowing in the second flow path flow in parallel.

[0232] According to (6), the second temperature-regulating medium flowing from the first branch flow path into the confluence section needs to flow from the first flow path into the second flow path in order to flow into the second branch flow path. However, this requires turning back approximately 180 degrees. Therefore, the second temperature-regulating medium flowing from the first branch flow path into the confluence section is less likely to flow into the second branch flow path. Thus, it is possible to suppress the flow of the second temperature-regulating medium flowing from the first branch flow path into the confluence section into the second branch flow path.

[0233] (7) The vehicle temperature control system according to any one of (1) to (6), wherein,

[0234] A throttling section (throttling section 625g) with a reduced flow path cross-sectional area is formed in the backflow suppression section.

[0235] According to (7), the second temperature regulating medium TCM2 experiences increased velocity and straightness in the throttling section where the flow path cross-sectional area decreases due to the Venturi effect, making it less prone to bending in the flow direction. This suppresses the situation where the second temperature regulating medium flowing from the first branch flow path into the confluence section flows into the second branch flow path and then flows back into the second branch flow path.

[0236] (8) The vehicle temperature control system according to any one of (1) to (7), wherein,

[0237] At the backflow suppression section, the second branch flow path is connected to the confluence section at an acute angle (angle θ) with the first branch flow path.

[0238] According to (8), the second temperature-regulating medium flowing from the first branch flow path into the confluence section needs to be turned back by more than 90 degrees in order to flow into the second branch flow path. Therefore, the second temperature-regulating medium flowing from the first branch flow path into the confluence section is less likely to flow into the second branch flow path. Thus, it is possible to suppress the flow of the second temperature-regulating medium flowing from the first branch flow path into the confluence section into the second branch flow path.

Claims

1. A vehicle temperature control system, comprising: The first temperature regulation circuit is equipped with a first pump and supplies a first temperature regulation medium for circulation to regulate the temperature of the first temperature-regulated device. The second temperature regulation circuit is equipped with a second pump, which circulates the second temperature regulation medium to regulate the temperature of the second temperature-regulated device; and A heat exchanger that performs heat exchange between a first temperature-regulating medium and a second temperature-regulating medium, wherein... The second temperature regulation circuit includes: Branching and confluence; A pressure conveying flow path is provided with a second pump, one end of the pressure conveying flow path is connected to the branch section, and the other end is connected to the confluence section; The first branch flow path is provided with the second temperature regulating device, one end of the first branch flow path is connected to the branch section, and the other end is connected to the confluence section; as well as The second branch flow path is equipped with the heat exchanger. One end of the second branch flow path is connected to the branch section, and the other end is connected to the confluence section. A heat sink is provided in the pressure delivery path for heat exchange between the second temperature regulating medium and the external gas. A flow regulating valve is provided in the second branch flow path to regulate the flow rate of the second temperature regulating medium flowing in the second branch flow path. A backflow suppression section is formed at the confluence to suppress the backflow of the second temperature regulating medium from the first branch flow path to the second branch flow path. The second branch flow path is connected so that the second temperature regulating medium flows in from the periphery of the first branch flow path. The upstream end of the confluence is located closer to the center of the first branch flow path than the downstream end of the confluence.

2. The vehicle temperature control system according to claim 1, wherein, The flow regulating valve has an inlet for the second temperature regulating medium to flow in, an outlet for the second temperature regulating medium to discharge out, an internal flow path extending from the inlet to the outlet, and a valve core component disposed in the internal flow path and for opening and closing the internal flow path. The flow regulating valve is configured such that, when fully closed, the valve core component moves toward the inlet to seal the inlet.

3. The vehicle temperature control system according to claim 1 or 2, wherein, The backflow suppression section has a guide wall that guides the second temperature-regulating medium flowing from the first branch flow path into the confluence section and the second temperature-regulating medium flowing from the second branch flow path into the confluence section. The guide wall is formed such that, when viewed from the flow direction of the second temperature regulating medium at the other end of the second branch flow path, at least a portion of the guide wall overlaps with the flow path at the other end of the second branch flow path.

4. The vehicle temperature control system according to claim 3, wherein, The vehicle temperature control system is mounted on the vehicle with the guide wall extending downstream and upward.

5. The vehicle temperature control system according to claim 4, wherein, The cross-sectional area of ​​the flow path at the end of the guide wall for the flow of the second temperature-regulating medium flowing from the second branch flow path into the confluence is smaller than the cross-sectional area of ​​the flow path at the other end of the second branch flow path.

6. The vehicle temperature control system according to claim 4 or 5, wherein, In the confluence section, a first flow path for the second temperature-regulating medium flowing from the first branch flow path into the confluence section and a second flow path for the second temperature-regulating medium flowing from the second branch flow path into the confluence section are formed by the peripheral wall of the confluence section and the guide wall. The first flow path and the second flow path are configured such that the second temperature regulating medium flowing in the first flow path and the second temperature regulating medium flowing in the second flow path flow in parallel.

7. The vehicle temperature control system according to any one of claims 1, 2, 4 and 5, wherein, A throttling section with a reduced flow path cross-sectional area is formed in the backflow suppression section.

8. The vehicle temperature control system according to any one of claims 1, 2, 4 and 5, wherein, At the backflow suppression section, the second branch flow path is connected to the confluence section at an acute angle to the first branch flow path.

9. A vehicle temperature control system, comprising: The first temperature regulation circuit is equipped with a first pump and supplies a first temperature regulation medium for circulation to regulate the temperature of the first temperature-regulated device. The second temperature regulation circuit is equipped with a second pump, which circulates the second temperature regulation medium to regulate the temperature of the second temperature-regulated device; and A heat exchanger that performs heat exchange between a first temperature-regulating medium and a second temperature-regulating medium, wherein... The second temperature regulation circuit includes: Branching and confluence; A pressure conveying flow path is provided with a second pump, one end of the pressure conveying flow path is connected to the branch section, and the other end is connected to the confluence section; The first branch flow path is provided with the second temperature regulating device, one end of the first branch flow path is connected to the branch section, and the other end is connected to the confluence section; as well as The second branch flow path is equipped with the heat exchanger. One end of the second branch flow path is connected to the branch section, and the other end is connected to the confluence section. A heat sink is provided in the pressure delivery path for heat exchange between the second temperature regulating medium and the external gas. A flow regulating valve is provided in the second branch flow path to regulate the flow rate of the second temperature regulating medium flowing in the second branch flow path. A backflow suppression section is formed at the confluence to suppress the backflow of the second temperature regulating medium from the first branch flow path to the second branch flow path. A throttling section with a reduced flow path cross-sectional area is formed in the backflow suppression section. The throttling section extends from the upstream side to the downstream side of the confluence point, and the flow path cross-sectional area is smallest at a position further downstream than the confluence point. The confluence point refers to the part where the second temperature regulating medium flowing into the confluence point from the first branch flow path and the second temperature regulating medium flowing into the confluence point from the second branch flow path merge.

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