Fluid circuit system

Abstract

To provide a fluid circuit system which switches the flow of a fluid to a plurality of connection devices, while suppressing pressure loss.SOLUTION: A fluid circuit system for guiding a fluid to a plurality of connection devices WC, CH, HC, LT, PT, BT includes a fluid circuit FC, and a plurality of valve devices MV1, MV2, MV3 for switching the flow of the fluid. The plurality of valve devices includes a housing where inflow ports P11, P14, P21, P26, P31, P33 and outflow ports P12, P13, P22, P23, P24, P25, P32, P34, P35 are formed, and a valve member for opening / closing the inflow ports and the outflow ports, and it is a multi-way valve structure having at least one of the inflow ports and the outflow ports in a plurality of numbers. The flow of the fluid to the unnecessary inflow port and the unnecessary outflow port in an open state of a predetermined valve device out of the plurality of valve devices is prohibited by closing the inflow port and the outflow port of the valve device different from the predetermined valve device out of the plurality of valve devices.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a fluid circuit system. [Background technology]

[0002] Conventionally, there is known a fluid circuit system used in an electric vehicle, which includes a multi-way valve that switches the flow of cooling water, which is a fluid (see, for example, Patent Document 1). The multi-way valve included in this fluid circuit system has a plurality of openings and a valve body that opens and closes the plurality of openings. The fluid circuit system switches the flow of the fluid by rotating the valve body of the multi-way valve to open and close the plurality of openings, thereby controlling the flow of the fluid to various connection devices connected to the fluid circuit system.

[0003] Specifically, the fluid circuit system described in Patent Document 1 opens the openings of the multi-way valve that communicate with a connected device that allows the fluid to flow in, and closes the openings that communicate with a connected device that does not allow the fluid to flow in. In this way, the fluid circuit system guides the fluid to the connected device that allows the fluid to flow in, and prohibits the fluid from being led out to the connected device that does not allow the fluid to flow in. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] German Patent Application Publication No. 102021109743 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, in the fluid circuit system described in Patent Document 1, when the number of connected devices connected to the fluid circuit system increases, it becomes necessary to increase the opening of the multi-way valve and complicate the structure of the valve body that opens and closes the opening in accordance with the increase in connected devices. However, according to the inventor's earnest study, an increase in the opening of the multi-way valve and a more complicated structure of the valve body cause an increase in pressure loss when the fluid flows through the multi-way valve. Furthermore, an increase in pressure loss occurring in the multi-way valve causes an increase in pressure loss in the entire fluid circuit system.

[0006] An object of the present disclosure is to provide a fluid circuit system that switches the flow of fluid to a plurality of connected devices while suppressing pressure loss. [Means for solving the problem]

[0007] The invention described in claim 1 is a fluid circuit system that introduces fluid to a plurality of connection devices (WC, CH, HC, LT, PT, BT, EH), A fluid circuit (FC) through which a fluid flows; a plurality of valve devices (MV1, MV2, MV3, MV4, MV5, MV6, RV) for switching the flow of fluid flowing through a fluid circuit; The valve devices include inlets (P11, P12, P13, P14, P21, P23, P24, P25, P26, P31, P33, P35, P41, P44, P52, P54, P55, P61, P63, P64, RP1, RP4, RP8, RP10) for introducing fluids and outlets (P11, P12, P13, P14, P22, P23, P24, P25, P26, P32, P33, P34, P35, P42, P43, P45, P51, P53, P56, P62, P65, RP2 , RP3, RP5, RP6, RP7, RP9) are formed in a housing (M10, R10), and valve members (MD1, MD2, MD3, MD4, MD5, MD6, R40, B) are housed inside the housing and open and close the inlet and the outlet, and the multi-way valve structure has at least one of the inlet and the outlet in a plurality of locations, and is switchable between directing the fluid to a connected device that requires the fluid to flow by the valve member and prohibiting the fluid from flowing to a connected device that does not require the fluid to flow, Among the inlets, an inlet that is connected to a connection device that does not require the flow of a fluid is defined as an unnecessary inlet, and among the outlets, an outlet that is connected to a connection device that does not require the flow of a fluid is defined as an unnecessary outlet, The flow of fluid to the undesired inlet and outlet of a valve device other than the specified valve device among the multiple valve devices, which are in an open state, is prohibited by closing the inlet and outlet of a valve device other than the specified valve device among the multiple valve devices.

[0008] If the inlet and outlet connected to a connected device that does not require the flow of fluid are necessarily closed by the valve member, the size of the inlet and outlet in the valve device may be restricted, and if the size of the inlet and outlet is made smaller than necessary, there is a risk of an increase in pressure loss when the fluid flows through the inlet and outlet.

[0009] In response to this, by blocking the inlet and outlet of a valve device other than the specified valve device to prohibit the flow of fluid to the open unnecessary inlet and outlet of the specified valve device, it is possible to reduce the restriction of the inlet and outlet of the specified valve device, and therefore it is possible to flow the fluid to the connected device that requires the flow of the fluid while suppressing the pressure loss that occurs when the fluid flows through the inlet and outlet.

[0010] The reference symbols in parentheses attached to each component indicate an example of the correspondence between the component and specific components described in the embodiments described below. [Brief description of the drawings]

[0011] [Figure 1] 1 is an overall configuration diagram of a temperature adjustment device to which a fluid circuit system according to a first embodiment is applied. [Diagram 2] FIG. 2 is a diagram showing a refrigeration cycle provided in the temperature adjustment device according to the first embodiment. [Diagram 3] FIG. 2 is an external view of a first multi-way valve according to the first embodiment. [Figure 4] FIG. 2 is an external view of a second multi-way valve according to the first embodiment. [Diagram 5] FIG. 4 is an external view of a third multi-way valve according to the first embodiment. [Figure 6] FIG. 4 is a cross-sectional view of a second multi-way valve according to the first embodiment. [Figure 7] FIG. 4 is a diagram showing a second fixed disk according to the first embodiment. [Figure 8] FIG. 4 is a partial cross-sectional view of a second movable disc according to the first embodiment. [Figure 9] FIG. 4 is a diagram illustrating a second through hole and a second communication hole of the second movable disc according to the first embodiment. [Figure 10] 13 is a diagram showing a state in which a second through hole and a second communication hole are in communication with a communication hole of a second fixed disk in the first embodiment. FIG. [Figure 11] FIG. 2 is a diagram showing a first fixed disk according to the first embodiment. [Figure 12]FIG. 4 is a diagram illustrating a first through hole and a first communication hole of the first movable disc according to the first embodiment. [Figure 13] FIG. 4 is a diagram showing a third fixed disk according to the first embodiment. [Figure 14] 6A to 6C are diagrams illustrating a third through hole and a third communication hole of the third movable disc according to the first embodiment. [Figure 15] 10 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 1-1 mode. FIG. [Figure 16] 10 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 1-2 mode. FIG. [Figure 17] 11 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 1-3 mode. FIG. [Figure 18] 10 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes a 1-4 mode. FIG. [Figure 19] 11 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 1-5 mode. FIG. [Figure 20] 11 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 1-6 mode. FIG. [Figure 21] FIG. 13 shows a comparative second fixed disk. [Figure 22] 13 is a diagram illustrating a second through hole and a second communication hole of the comparative second movable disc. FIG. [Figure 23] FIG. 13 shows a comparative third fixed disk. [Figure 24] A figure showing the relative position of the first movable disk to the first fixed disk when the temperature adjustment device executes mode 1-1, the relative position of the comparative second movable disk to the comparative second fixed disk, and the relative position of the third movable disk to the comparative third fixed disk. [Diagram 25]A figure showing the relative position of the first movable disk to the first fixed disk when the temperature adjustment device executes 1-2 mode, the relative position of the comparative second movable disk to the comparative second fixed disk, and the relative position of the third movable disk to the comparative third fixed disk. [Figure 26] A figure showing the relative position of the first movable disk to the first fixed disk, the relative position of the comparative second movable disk to the comparative second fixed disk, and the relative position of the third movable disk to the comparative third fixed disk when the temperature adjustment device executes mode 1-3. [Figure 27] A figure showing the relative position of the first movable disk to the first fixed disk, the relative position of the comparative second movable disk to the comparative second fixed disk, and the relative position of the third movable disk to the comparative third fixed disk when the temperature adjustment device executes mode 1-4. [Figure 28] A figure showing the relative position of the first movable disk to the first fixed disk, the relative position of the comparative second movable disk to the comparative second fixed disk, and the relative position of the third movable disk to the comparative third fixed disk when the temperature adjustment device executes mode 1-5. [Figure 29] A figure showing the relative position of the first movable disk to the first fixed disk, the relative position of the comparative second movable disk to the comparative second fixed disk, and the relative position of the third movable disk to the comparative third fixed disk when the temperature adjustment device executes mode 1-6. [Diagram 30] A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device is executing mode 1-1. [Diagram 31] 13 is a diagram for explaining that, when the temperature adjustment device executes the 1-1 mode, the waste flow outlet of the second multi-way valve is blocked by the first multi-way valve. FIG. [Diagram 32]A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device executes mode 1-2. [Diagram 33] 13 is a diagram for explaining that, when the temperature adjustment device executes the 1-2 mode, the waste flow outlet of the second multi-way valve is blocked by the first multi-way valve. FIG. [Diagram 34] A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device executes mode 1-3. [Diagram 35] 13 is a diagram for explaining that, when the temperature adjustment device executes the 1-3 mode, the waste flow outlet of the second multi-way valve is blocked by the first multi-way valve. FIG. [Diagram 36] A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device executes mode 1-4. [Figure 37] 13 is a diagram for explaining that no fluid flows through the waste inlet and waste outlet of the second multi-way valve when the temperature adjustment device executes the 1-4 mode. FIG. [Figure 38] A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device executes mode 1-5. [Figure 39] 13 is a diagram for explaining that the waste flow outlet of the second multi-way valve is blocked by the second multi-way valve when the temperature adjustment device executes the 1-5 mode. FIG. [Diagram 40] A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device executes mode 1-6. [Diagram 41] 11 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 1-6 mode. FIG. [Diagram 42] FIG. 11 is an overall configuration diagram of a temperature adjustment device to which a fluid circuit system according to a second embodiment is applied. [Diagram 43] 10A and 10B are diagrams for explaining the operation of the first multi-way valve according to the second embodiment. [Diagram 44] 13A to 13C are diagrams for explaining the operation of the second multi-way valve according to the second embodiment. [Diagram 45] 13A to 13C are diagrams for explaining the operation of the third multi-way valve according to the second embodiment. [Figure 46] 13 is a diagram illustrating a fourth through hole and a fourth communication hole of a fourth fixed disk according to the second embodiment. FIG. [Figure 47] 13A to 13C are diagrams for explaining the operation of the fourth multi-way valve according to the second embodiment. [Figure 48] 13 is a diagram illustrating a fifth through hole and a fifth communication hole of a fifth fixed disk according to the second embodiment. FIG. [Figure 49] 13A to 13C are diagrams for explaining the operation of the fifth multi-way valve according to the second embodiment. [Figure 50] 11 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 2-1 mode. FIG. [Figure 51] 13 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 2-2 mode. FIG. [Figure 52] 11 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 2-3 mode. FIG. [Figure 53] 11 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 2-4 mode. FIG. [Figure 54] 13 is a diagram showing the relative position of a comparative second movable disk with respect to a second fixed disk when the temperature adjustment device executes a 2-1 mode. FIG. [Figure 55]13 is a diagram showing the relative position of the comparative second movable disk with respect to the second fixed disk when the temperature adjustment device executes the 2-2 mode. FIG. [Figure 56] 13 is a diagram showing the relative position of the comparative second movable disk with respect to the second fixed disk when the temperature adjustment device executes the 2-3 mode. FIG. [Figure 57] 13 is a diagram showing the relative position of the comparative second movable disk with respect to the second fixed disk when the temperature adjustment device executes mode 2-4. FIG. [Figure 58] A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device executes mode 2-1. [Figure 59] 13 is a diagram for explaining that, when the temperature adjustment device executes the 2-1 mode, the waste flow outlet of the second multi-way valve is blocked by the first multi-way valve. FIG. [Figure 60] A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device executes mode 2-2. [Figure 61] 13 is a diagram for explaining that, when the temperature adjustment device executes the 2-2 mode, the unnecessary inlet of the second multi-way valve is blocked by the first multi-way valve. FIG. [Figure 62] A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device executes mode 2-3. [Figure 63] 13 is a diagram for explaining that, when the temperature adjustment device executes the 2-3 mode, the unnecessary inlet of the second multi-way valve is blocked by the first multi-way valve. FIG. [Figure 64]A diagram showing the relative position of the first movable disk to the first fixed disk, the relative position of the second movable disk to the second fixed disk, and the relative position of the third movable disk to the third fixed disk when the temperature adjustment device executes mode 2-4. [Figure 65] FIG. 11 is an overall configuration diagram of a temperature adjustment device to which a fluid circuit system according to a third embodiment is applied. [Figure 66] FIG. 13 is a diagram for explaining that the second multi-way valve of the second embodiment can be replaced with the sixth multi-way valve of the third embodiment. [Figure 67] 13 is a diagram illustrating a sixth through hole and a sixth communication hole of a sixth fixed disk according to the third embodiment. FIG. [Figure 68] FIG. 13 is a diagram showing the relative position of the sixth movable disc with respect to the sixth fixed disc when the fluid circuit system performs a first operation. [Figure 69] FIG. 13 is a diagram showing the relative position of the sixth movable disc with respect to the sixth fixed disc when the fluid circuit system performs a second operation. [Figure 70] FIG. 13 is a diagram showing the relative position of the sixth movable disc with respect to the sixth fixed disc when the fluid circuit system performs a third operation. [Figure 71] FIG. 13 is a diagram showing the relative position of the sixth movable disc with respect to the sixth fixed disc when the fluid circuit system performs the fourth operation. [Figure 72] FIG. 13 is an overall configuration diagram of a temperature adjustment device to which a fluid circuit system according to a fourth embodiment is applied. [Figure 73] FIG. 13 is an external view of a fluid control valve according to a fourth embodiment. [Figure 74] FIG. 11 is a cross-sectional view of a fluid control valve according to a fourth embodiment. [Figure 75] FIG. 13 is a front view of a main body of a fluid control valve according to a fourth embodiment. [Figure 76] FIG. 13 is a top view of a main body of a fluid control valve according to a fourth embodiment. [Figure 77] FIG. 13 is a diagram showing a valve of a fluid control valve according to a fourth embodiment. [Figure 78] FIG. 11 is a cross-sectional view of a fluid control valve according to a fourth embodiment. [Figure 79] FIG. 13 is a schematic diagram showing a valve according to a fourth embodiment in a simplified manner. [Figure 80] FIG. 10 is a circumferential development view of a valve according to a fourth embodiment. [Figure 81] FIG. 13 is a diagram showing a state before the sealing member according to the fourth embodiment is attached to a main body. [Figure 82] FIG. 13 is a diagram showing a state in which the sealing member according to the fourth embodiment is attached to a main body. [Figure 83] 13 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 3-1 mode. FIG. [Figure 84] 13 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 3-2 mode. FIG. [Figure 85] 13 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes mode 3-3. FIG. [Figure 86] 13 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 3-4 mode. FIG. [Figure 87] 13 is a diagram for explaining the flow of cooling water flowing through the fluid circuit system when the temperature adjustment device executes the 3-5 mode. FIG. [Figure 88] FIG. 1 is a simplified schematic diagram of a comparative valve. [Figure 89] FIG. 13 is a circumferential development view of the comparative valve. [Figure 90] FIG. 13 is a schematic diagram showing, in a simplified manner, an opening formed in a main body of a fluid control valve according to a fourth embodiment. [Figure 91] 13 is a diagram showing the relative position of the comparison valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes the 3-1 mode. FIG. [Figure 92] 13 is a diagram showing the relative position of the comparison valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes the 3-2 mode. FIG. [Figure 93]13 is a diagram showing the relative position of the comparison valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes mode 3-3. FIG. [Figure 94] 13 is a diagram showing the relative position of the comparison valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes mode 3-4. FIG. [Figure 95] 13 is a diagram showing the relative position of the comparison valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes mode 3-5. FIG. [Figure 96] 13 is a diagram showing the relative position of the valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes mode 3-1. FIG. [Figure 97] 13 is a diagram for explaining that, when the temperature adjustment device executes the 3-1 mode, the waste flow outlet of the fluid control valve is blocked by the third multi-way valve and the fluid control valve. FIG. [Figure 98] 13 is a diagram showing the relative position of the valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes mode 3-2. FIG. [Figure 99] 13 is a diagram for explaining that no fluid flows through the waste inlet and waste outlet of the fluid control valve when the temperature adjustment device executes the 3-2 mode. FIG. [Figure 100] 13 is a diagram showing the relative position of the valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes mode 3-3. FIG. [Figure 101] 13 is a diagram for explaining that, when the temperature adjustment device executes mode 3-3, the waste flow outlet of the fluid control valve is blocked by the third multi-way valve and the fluid control valve. FIG. [Figure 102] 13 is a diagram showing the relative position of the valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes mode 3-4. FIG. [Figure 103]13 is a diagram for explaining that no fluid flows through the waste inlet and waste outlet of the fluid control valve when the temperature adjustment device executes the 3-4 mode. FIG. [Figure 104] 13 is a diagram showing the relative position of the valve with respect to the opening and the relative position of the third movable disk with respect to the third fixed disk when the temperature adjustment device executes mode 3-5. FIG. [Figure 105] 13 is a diagram for explaining that no fluid flows through the waste inlet and waste outlet of the fluid control valve when the temperature adjustment device executes mode 3-5. FIG. [Fig. 106] 13A and 13B are diagrams illustrating an example of a ball valve of a ball valve device provided in a fluid circuit system according to another embodiment. [Figure 107] FIG. 2 illustrates the internal fluid flow path of a ball valve. [Figure 108] 13A and 13B are diagrams illustrating an example of a ball valve of a ball valve device provided in a fluid circuit system according to another embodiment. [Fig. 109] FIG. 2 illustrates the internal fluid flow path of a ball valve. [Figure 110] 13A and 13B are diagrams illustrating an example of a valve body of a ball valve provided in a fluid circuit system according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, the same reference numerals are used for parts that are the same as or equivalent to those described in the preceding embodiments, and the description thereof may be omitted. In addition, in the embodiments, when only a part of the components is described, the components described in the preceding embodiments can be applied to the other parts of the components. In the following embodiments, each embodiment can be partially combined with each other, even if not specifically stated, as long as it does not cause any trouble in combination.

[0013] (First embodiment) A fluid circuit system 1 of this embodiment will be described with reference to Figs. 1 to 41. In this embodiment, an example will be described in which the fluid circuit system 1 shown in Fig. 1 is applied to a temperature adjustment device (not shown) mounted on an electric vehicle. The temperature adjustment device includes a vehicle air conditioner (not shown) having a compressor 2a, expansion valves 2b and 2c, an evaporator 2d, and the like constituting a refrigeration cycle 2 shown in Fig. 2 that circulates a refrigerant (heat transport medium), in addition to the fluid circuit system 1 that circulates a fluid that is a heat transport medium. The temperature adjustment device is a heat distribution system that appropriately distributes heat generated in the refrigeration cycle 2 and heat generated in various heat generating devices to various connected devices that require heat, via the refrigerant circulating in the refrigeration cycle 2 and the fluid circulating in the fluid circuit system 1.

[0014] In the refrigeration cycle 2, for example, an HFO refrigerant, specifically, R1234yf, is used as the refrigerant, and a subcritical refrigeration cycle of a vapor compression type is configured in which the pressure of the refrigerant discharged from the compressor 2a does not exceed the critical pressure of the refrigerant. Note that, as the refrigerant, an HFC refrigerant, for example, R134a, or a natural refrigerant, for example, carbon dioxide, may be used.

[0015] In addition, for example, cooling water can be used as the fluid in the fluid circuit system 1. Specifically, the cooling water can be a solution containing ethylene glycol, dimethylpolysiloxane, nanofluid, or the like, or an antifreeze solution. However, the cooling water may be a liquid containing water other than the antifreeze solution.

[0016] 1, the temperature adjustment device is connected to a fluid circuit system 1, which includes a water-cooled condenser WC, a radiator LT, a chiller CH, a heater core HC, a driving heat generating part PT, and a battery BT as connected devices. The fluid circuit system 1 includes a fluid circuit FC that guides fluid to various connected devices of the temperature adjustment device, pumps P1, P2, and P3 that generate fluid flow, connectors CV1, CV2, and CV3 that connect multiple flow paths, and multi-way valves MV1, MV2, and MV3 that switch the fluid circuit FC. The fluid circuit system 1 is configured to be able to switch the fluid circuit FC depending on the operation mode of the temperature adjustment device, which will be described later, and guide the heat generated in the refrigeration cycle 2 to various connected devices of the temperature adjustment device.

[0017] First, the refrigeration cycle 2 will be described with reference to Fig. 2. The refrigeration cycle 2 includes a compressor 2a, a water-cooled condenser WC, a first expansion valve 2b, a second expansion valve 2c, an evaporator 2d, and a chiller CH.

[0018] The compressor 2a draws in, compresses, and discharges the refrigerant in the refrigeration cycle 2. The compressor 2a is an electric compressor that uses an electric motor to rotate a fixed-capacity compression mechanism with a fixed discharge capacity. The compressor 2a is electrically connected to a control device 10, which will be described later, and the rotation speed, i.e., the refrigerant discharge capacity, is controlled by a control signal output from the control device 10. A water-cooled condenser WC is connected to the discharge port of the compressor 2a.

[0019] The water-cooled condenser WC is a water-refrigerant heat exchanger that cools the refrigerant and heats the cooling water by exchanging heat between the high-pressure refrigerant discharged from the compressor 2a and the cooling water circulating through the fluid circuit system 1. The water-cooled condenser WC has a refrigerant passage through which the high-pressure refrigerant discharged from the compressor 2a flows, and a water passage through which the cooling water circulating through the fluid circuit system 1 flows. In addition, a first expansion valve 2b and a second expansion valve 2c are connected to the outlet of the refrigerant passage of the water-cooled condenser WC.

[0020] The first expansion valve 2b is a pressure reducing device that reduces the pressure of the high-pressure refrigerant flowing out from the refrigerant passage of the water-cooled condenser WC and adjusts the flow rate of the refrigerant flowing out downstream, i.e., the mass flow rate, during an operation mode in which the vehicle cabin is cooled, for example. The first expansion valve 2b is an electric variable throttling mechanism that includes a valve body configured to be able to change the throttling opening and an electric actuator that changes the opening of the valve body.

[0021] The first expansion valve 2b adjusts the flow rate of the refrigerant flowing through the passage by changing the valve opening degree within a range from fully closed to fully open. The first expansion valve 2b is electrically connected to the control device 10, and its operation is controlled by a control signal output from the control device 10. The outlet side of the first expansion valve 2b is connected to the inlet side of the evaporator 2d.

[0022] The second expansion valve 2c is a pressure reducing device that reduces the pressure of the refrigerant flowing out from the refrigerant passage of the water-cooled condenser WC and adjusts the flow rate of the refrigerant flowing out downstream during an operation mode in which the battery BT is cooled. The second expansion valve 2c has a basic configuration similar to that of the first expansion valve 2b, so a detailed description will be omitted. The outlet side of the second expansion valve 2c is connected to the inlet side of the chiller CH.

[0023] The evaporator 2d is a cooling heat exchanger that exchanges heat between the low-pressure refrigerant decompressed in the first expansion valve 2b and the blown air flowing through an air conditioning case of a vehicle air conditioner (not shown) to evaporate the low-pressure refrigerant and cool the blown air by making the low-pressure refrigerant absorb heat. The evaporator 2d is disposed in the air conditioning case. The refrigerant outlet of the evaporator 2d is connected to the suction port side of the compressor 2a.

[0024] The chiller CH is an evaporator that, for example, during an operation mode in which the battery BT is cooled, exchanges heat between a low-pressure refrigerant decompressed in the second expansion valve 2c and the cooling water circulating in the fluid circuit system 1, evaporating the low-pressure refrigerant to exert a heat absorption effect. The outlet of the chiller CH is connected to the suction port side of the compressor 2a.

[0025] Next, the connection devices connected to the fluid circuit system 1 will be described with reference to Fig. 1. The connection devices connected to the fluid circuit system 1 include a water-cooled condenser WC, a chiller CH, a heater core HC, a radiator LT, a driving heat generating part PT, and a battery BT.

[0026] As described above, the water-cooled condenser WC is a water-refrigerant heat exchanger for heating that uses the high-pressure refrigerant discharged from the compressor 2a of the refrigeration cycle 2 to heat the cooling water circulating through the fluid circuit system 1. The water-cooled condenser WC is provided between a third pump P3 (to be described later) and a third multi-way valve MV3 (to be described later).

[0027] As described above, the chiller CH is an evaporator that uses the low-pressure refrigerant decompressed in the second expansion valve 2c to cool the cooling water circulating in the fluid circuit system 1. The chiller CH is provided between a first pump P1 (described later) and a second multi-way valve MV2 (described later).

[0028] The heater core HC is a heating device that heats the blown air cooled by the evaporator 2d in an air conditioning case of the vehicle air conditioner by exchanging heat between the blown air and the coolant heated by the water-cooled condenser WC. The heater core HC is disposed downstream of the evaporator 2d in the air conditioning case, and heats the blown air that has passed through the evaporator 2d and been cooled. The heater core HC is provided between a third multi-way valve MV3 (described later) and a third connection part CV3 (described later).

[0029] An air mix door (not shown) is provided in the air conditioning case to adjust the ratio of the volume of the air passing through the heater core HC to the volume of the air bypassing the heater core HC among the air that has passed through the evaporator 2d. The temperature of the conditioned air that flows through the air conditioning case and is blown into the vehicle compartment is adjusted by this air mix door.

[0030] The radiator LT is a water-to-outside air heat exchanger that exchanges heat between the heat medium heated in the water-cooled condenser WC and outside air blown by an outside air fan (not shown). The radiator LT is disposed, for example, in front of a drive unit that drives the vehicle. The radiator LT is provided between a second pump P2 (described later) and a second multi-way valve MV2 (described later).

[0031] The driving heat generating part PT is an electric component for obtaining driving force for running the electric vehicle. The driving heat generating part PT includes, for example, a driving electric motor that outputs driving force for running, an inverter that supplies power for driving the driving electric motor, and a DC-DC converter that adjusts the voltage supplied from the battery BT. The driving heat generating part PT may also include a motor generator that integrates a transmission and a final gear / differential gear. The driving heat generating part PT including these electric components is a heat generating part that generates heat when in operation.

[0032] When the driving heat generating part PT becomes hot, the electronic components such as the electric circuit are easily deteriorated. Also, when the driving heat generating part PT becomes cold, it may become difficult to obtain normal operation. For this reason, it is desirable that the driving heat generating part PT be maintained within an appropriate temperature range from the viewpoint of protecting the electric circuit and normal operation.

[0033] Therefore, the driving heat generating part PT of this embodiment has a water passage (not shown) for circulating the cooling water circulating in the fluid circuit system 1 inside, and is configured to be able to exchange heat with the cooling water circulating in the fluid circuit system 1. When cooling water with a temperature lower than the temperature of the driving heat generating part PT itself flows through the water passage, such as when some time has passed since the driving start, the driving heat generating part PT absorbs heat from the cooling water and is cooled. Also, when not much time has passed since the driving start, such as immediately after the driving start, when cooling water with a temperature higher than the temperature of the driving heat generating part PT itself flows through the water passage, the driving heat generating part PT absorbs heat from the cooling water and is heated. The driving heat generating part PT is provided between a first multi-way valve MV1 described later and a second multi-way valve MV2 described later.

[0034] The battery BT is a secondary battery that supplies power to the DCDC converter, which is the driving heat generating part PT, and can store power by charging. The battery BT is formed, for example, by electrically connecting a plurality of battery cells in series or in parallel. The battery BT is a heat generating part that generates heat by itself when it is charged by power supplied from an external power source provided outside the vehicle or when it supplies power to the outside.

[0035] The output of the battery BT is likely to decrease at low temperatures, and degradation is likely to progress at high temperatures. For this reason, it is desirable to maintain the temperature of the battery BT within an appropriate temperature range that allows the charge / discharge capacity of the battery BT to be fully utilized.

[0036] Therefore, the battery BT of this embodiment has a water passage (not shown) through which the cooling water circulating in the fluid circuit system 1 flows, and is configured to be able to exchange heat with the cooling water circulating in the fluid circuit system 1. When some time has passed since the start of power supply or some time has passed since the start of charging, the battery BT is cooled by absorbing heat from the cooling water. When not much time has passed since the start of power supply or charging, such as immediately after the start of power supply or charging, the battery BT is heated by absorbing heat from the cooling water when cooling water with a temperature higher than the temperature of the battery BT flows through the water passage. The battery BT is provided between a first multi-way valve MV1 described later and a third multi-way valve MV3 described later.

[0037] Next, the fluid circuit system 1 will be described with reference to Fig. 1 and Figs. 3 to 14. The fluid circuit system 1 has a fluid circuit FC that guides the cooling water to the connected devices, namely, the water-cooled condenser WC, the chiller CH, the heater core HC, the radiator LT, the driving heat generating part PT, and the battery BT. The fluid circuit system 1 also has a first pump P1, a second pump P2, and a third pump P3 that generate a flow for the cooling water to flow through the fluid circuit FC. The fluid circuit system 1 also has a first connection part CV1, a second connection part CV2, and a third connection part CV3 that connect a plurality of flow paths through which the cooling water flows in the fluid circuit FC to communicate the plurality of flow paths. Furthermore, the fluid circuit system 1 has a first multi-way valve MV1, a second multi-way valve MV2, and a third multi-way valve MV3 that switch the fluid circuit FC.

[0038] The first pump P1, the second pump P2, and the third pump P3 are water pumps that pump the cooling water flowing through the fluid circuit FC downstream in the water flow. Each of the first pump P1, the second pump P2, and the third pump P3 is electrically connected to the control device 10, and an electric pump is used in which the rotation speed, i.e., the pumping capacity, is controlled by a control voltage output from the control device 10. The first pump P1, the second pump P2, and the third pump P3 change the flow rate of the cooling water pumped by themselves in response to a change in the control voltage output from the control device 10, thereby changing the flow rate per unit time of the cooling water flowing toward the downstream side of the water flow.

[0039] The first pump P1 is provided between the first multi-way valve MV1 and the second multi-way valve MV2, and generates a flow for the cooling water to flow from the first multi-way valve MV1 to the second multi-way valve MV2. The second pump P2 is provided between the first multi-way valve MV1 and the third multi-way valve MV3 and the second multi-way valve MV2. The second pump P2 generates a flow for the cooling water to flow from the first multi-way valve MV1 to the second multi-way valve MV2, and generates a flow for the cooling water to flow from the third multi-way valve MV3 to the second multi-way valve MV2. The third pump P3 is provided between the second multi-way valve MV2 and the third multi-way valve MV3, and generates a flow for the cooling water to flow from the second multi-way valve MV2 to the third multi-way valve MV3.

[0040] The first connection part CV1, the second connection part CV2, and the third connection part CV3 are three-way joints having three ports to which the flow paths are connected. The first connection part CV1, the second connection part CV2, and the third connection part CV3 have two of the three ports connected to the outlet side of the flow path to be connected. The first connection part CV1, the second connection part CV2, and the third connection part CV3 have the inlet side of the flow path to be connected to the remaining one port. That is, the first connection part CV1, the second connection part CV2, and the third connection part CV3 have two inflow ports through which the cooling water flows in, and one outflow port through which the cooling water flows out. The first connection part CV1, the second connection part CV2, and the third connection part CV3 cause the cooling water flowing in from each of the two inflow ports to flow out to one outflow port.

[0041] The first connection part CV1 has one of two inlet ports connected to a flow path through which the cooling water flows out of the first multi-way valve MV1, and the other inlet port connected to a flow path through which the cooling water flows out of the second multi-way valve MV2. Also, the first connection part CV1 has an outlet port connected to a flow path for guiding the cooling water to the second multi-way valve MV2.

[0042] The second connection part CV2 has one of two inlet ports connected to a flow path through which the cooling water flows out of the first multi-way valve MV1, and the other inlet port connected to a flow path through which the cooling water flows out of the third multi-way valve MV3. Also, the second connection part CV2 has an outlet port connected to a flow path for guiding the cooling water to the second multi-way valve MV2.

[0043] The third connection part CV3 has two inflow ports, one of which is connected to a flow path through which the cooling water flowing out from the second multi-way valve MV2 flows, and the other inflow port is connected to a flow path through which the cooling water flowing out from the third multi-way valve MV3 flows. Also, the third connection part CV3 has an outflow port connected to a flow path for guiding the cooling water to the third multi-way valve MV3.

[0044] The first multi-way valve MV1, the second multi-way valve MV2, and the third multi-way valve MV3 are valve devices having a multi-way valve structure that has multiple cooling water inlets and multiple cooling water outlets and causes the cooling water that flows into the valve devices to flow out from the cooling water outlets that correspond to each operation mode of the temperature adjustment device. Hereinafter, the first multi-way valve MV1, the second multi-way valve MV2, and the third multi-way valve MV3 may also be referred to as the first multi-way valve MV1 to the third multi-way valve MV3.

[0045] The first multi-way valve MV1 is a four-way valve having two cooling water inlets and two cooling water outlets, as shown in Figures 1 and 3. The second multi-way valve MV2 is a six-way valve having two cooling water inlets and four cooling water outlets, as shown in Figures 1 and 4. The third multi-way valve MV3 is a five-way valve having two cooling water inlets and three cooling water outlets, as shown in Figures 1 and 5.

[0046] Hereinafter, the two cooling water inlets formed in the first multi-way valve MV1 are referred to as the 1-1 opening P11 and the 1-4 opening P14, and the two cooling water outlets formed in the first multi-way valve MV1 are referred to as the 1-2 opening P12 and the 1-3 opening P13. The two cooling water inlets formed in the second multi-way valve MV2 are referred to as the 2-1 opening P21 and the 2-6 opening P26. The four cooling water outlets formed in the second multi-way valve MV2 are referred to as the 2-2 opening P22, the 2-3 opening P23, the 2-4 opening P24, and the 2-5 opening P25. In addition, the two cooling water inlets formed in the third multi-way valve MV3 are called the 3-1 opening P31 and the 3-3 opening P33, and the three cooling water outlets formed in the third multi-way valve MV3 are called the 3-2 opening P32, the 3-4 opening P34, and the 3-5 opening P35.

[0047] In the first multi-way valve MV1 shown as a rectangle in Fig. 1 etc., the four vertices of the rectangle indicate the 1-1 opening P11, the 1-2 opening P12, the 1-3 opening P13, and the 1-4 opening P14 of the first multi-way valve MV1. In the second multi-way valve MV2 shown as a hexagon in Fig. 1 etc., the six vertices of the hexagon indicate the 2-1 opening P21, the 2-2 opening P22, the 2-3 opening P23, the 2-4 opening P24, the 2-5 opening P25, and the 2-6 opening P26 of the second multi-way valve MV2. In the third multi-way valve MV3 shown as a pentagon in Fig. 1 etc., the five vertices of the pentagon indicate the 3-1 opening P31, the 3-2 opening P32, the 3-3 opening P33, the 3-4 opening P34, and the 3-5 opening P35 of the third multi-way valve MV3.

[0048] The first multi-way valve MV1 has a 1-1 opening P11 connected to the 3-5 opening P35 of the third multi-way valve MV3, a 1-2 opening P12 connected to one inlet port of the second connection part CV2, and a 1-3 opening P13 connected to one inlet port of the first connection part CV1. Also, the first multi-way valve MV1 has a 1-4 opening P14 connected to the 2-4 opening P24 of the second multi-way valve MV2.

[0049] In the second multi-way valve MV2, an outlet port of the second connection part CV2 is connected to the 2-1 opening P21, a 3-3 opening P33 of the third multi-way valve MV3 is connected to the 2-2 opening P22, and one inlet port of the third connection part CV3 is connected to the 2-3 opening P23. In addition, in the second multi-way valve MV2, a 1-4 opening P14 of the first multi-way valve MV1 is connected to the 2-4 opening P24, the other inlet port of the first connection part CV1 is connected to the 2-5 opening P25, and an outlet port of the first connection part CV1 is connected to the 2-6 opening P26.

[0050] In the third multi-way valve MV3, the outflow port of the third connection part CV3 is connected to the 3-1 opening P31, the other inflow port of the third connection part CV3 is connected to the 3-2 opening P32, and the 2-2 opening P22 of the second multi-way valve MV2 is connected to the 3-3 opening P33. In addition, in the third multi-way valve MV3, the other inflow port of the second connection part CV2 is connected to the 3-4 opening P34, and the 1-1 opening P11 of the first multi-way valve MV1 is connected to the 3-5 opening P35.

[0051] Hereinafter, the flow path connecting the 1-1 opening P11 of the first multi-way valve MV1 and the 3-5 opening P35 of the third multi-way valve MV3 is called the P35-P11 flow path FC1. The flow path connecting the 1-2 opening P12 of the first multi-way valve MV1 and one of the inlet ports of the second connection part CV2 is called the P12-CV2 flow path FC2. The flow path connecting the 1-3 opening P13 of the first multi-way valve MV1 and one of the inlet ports of the first connection part CV1 is called the P13-CV1 flow path FC3. The flow path connecting the 1-4 opening P14 of the first multi-way valve MV1 and the 2-4 opening P24 of the second multi-way valve MV2 is called the P24-P14 flow path FC4.

[0052] The flow path connecting the 2-1 opening P21 of the second multi-way valve MV2 and the outlet port of the second connection part CV2 is called the CV2-P21 flow path FC5. The flow path connecting the 2-2 opening P22 of the second multi-way valve MV2 and the 3-3 opening P33 of the third multi-way valve MV3 is called the P22-P33 flow path FC6. The flow path connecting the 2-3 opening P23 of the second multi-way valve MV2 and one inlet port of the third connection part CV3 is called the P23-CV3 flow path FC7. The flow path connecting the 2-5 opening P25 of the second multi-way valve MV2 and the other inlet port of the first connection part CV1 is called the P25-CV1 flow path FC8. The flow path connecting the 2-6 opening P26 of the second multi-way valve MV2 and the outlet port of the first connection part CV1 is called the CV1-P26 flow path FC9.

[0053] The flow path connecting the 3-1 opening P31 of the third multi-way valve MV3 and the outlet port of the third connection part CV3 is called the CV3-P31 flow path FC10. The flow path connecting the 3-2 opening P32 of the third multi-way valve MV3 and the other inlet port of the third connection part CV3 is called the P32-CV3 flow path FC11. The flow path connecting the 3-4 opening P34 of the third multi-way valve MV3 and the other inlet port of the second connection part CV2 is called the P34-CV2 flow path FC12.

[0054] A battery BT is provided in the P35-P11 flow path FC1. A driving heat generating part PT is provided in the P24-P14 flow path FC4. A radiator LT is provided in the CV2-P21 flow path FC5. A chiller CH is provided in the CV1-P26 flow path FC9. A water-cooled condenser WC is provided in the CV3-P31 flow path FC10. A heater core HC is provided in the P32-CV3 flow path FC11.

[0055] Here, the first multi-way valve MV1 to the third multi-way valve MV3 are configured to be able to change the destination of the cooling water flowing into them by connecting their own cooling water inlets to their own cooling water outlets. The first multi-way valve MV1 to the third multi-way valve MV3 are able to switch the flow path through which the cooling water flows in the fluid circuit FC by changing the destination of the cooling water.

[0056] Furthermore, the first multi-way valve MV1, the second multi-way valve MV2, and the third multi-way valve MV3 have different numbers of cooling water outlets, but have the same basic structure. For this reason, of the first multi-way valve MV1, the second multi-way valve MV2, and the third multi-way valve MV3, the detailed structure of the second multi-way valve MV2 will be described with reference to Fig. 6, and detailed descriptions of the first multi-way valve MV1 and the third multi-way valve MV3 will be omitted.

[0057] As shown in Fig. 6, the second multi-way valve MV2 of this embodiment includes a housing M10, a second fixed disc FD2, a second movable disc MD2, a drive unit M20, a lever M30, a torsion spring M40, a compression spring M50, and the like. The second multi-way valve MV2 of this embodiment is configured as a disc valve device in which the drive unit M20 rotates the second movable disc MD2 together with a shaft M21 described below to switch the fluid circuit FC. The second multi-way valve MV2 is configured to be able to switch the operation mode of the temperature adjustment device by switching the fluid circuit FC. The operation mode of the temperature adjustment device is switched by the drive unit M20 rotating the second movable disc MD2.

[0058] The housing M10 constitutes the outer shell of the second multi-way valve MV2 and is a casing that forms a valve body flow path VF inside the housing M10, through which the cooling water flows. The housing M10 is a non-rotating member. Specifically, the housing M10 has a lower housing M11 having a bottomed cylindrical shape and an upper housing M12 that closes the opening side of the lower housing M11. The lower housing M11 and the upper housing M12 are molded, for example, by injection molding, in which a resin material is poured into a mold and hardened into a desired shape.

[0059] As shown in Fig. 6, a shaft M21 is inserted inside the housing M10, spanning from the lower housing M11 through the upper housing M12 to the drive unit M20. The housing M10 also accommodates therein components such as a second fixed disc FD2, a second movable disc MD2, a lever M30, a torsion spring M40, and a compression spring M50. The housing M10 defines a valve body flow path VF in the direction in which the shaft axis SC of the shaft M21 extends, by the second fixed disc FD2 and the second movable disc MD2.

[0060] 1 etc., the direction along the shaft axis SC of the shaft M21 is defined as the axial direction DRa, one side of the axial direction DRa is defined as the downward direction DRa1, and the direction opposite to the downward direction DRa1 is defined as the upward direction DRa2. The downward direction DRa1 is the direction from the upper housing M12 side toward the lower housing M11 side in the axial direction DRa.

[0061] In addition, the various configurations and the like will be described with the direction perpendicular to the axial direction DRa and extending radially from the axial direction DRa as the shaft radial direction DRr, and the direction around the shaft axis SC centered on the shaft axis SC as the shaft circumferential direction DRc. The shaft circumferential direction DRc is the rotation direction of the shaft M21 that rotates by the driving force supplied from the driving unit M20. Note that the driving unit M20 and the shaft M21 are omitted in Figures 3, 4, and 5. Also, the directions shown in Figure 3 and the like are merely examples and do not limit the installation state of the second multi-way valve MV2 of the present disclosure.

[0062] Of the valve element flow path VF in the housing M10, the flow path on the downward DRa1 side of the second fixed disc FD2 and the second movable disc MD2 is also called a lower flow path VF1, and the flow path on the upward DRa2 side of the second fixed disc FD2 and the second movable disc MD2 is also called an upper flow path VF2. That is, in this embodiment, the valve element flow path VF in the housing M10 is partitioned into an upper flow path VF2 and a lower flow path VF1 by the second fixed disc FD2 and the second movable disc MD2.

[0063] The lower housing M11 has a bottomed cylindrical shape and defines the valve element flow path VF formed by the housing M10. Specifically, the lower housing M11 defines an upper flow path VF2 and a lower flow path VF1.

[0064] Additionally, six ports M111, M112, M113, M114, M115, and M116 are connected to the lower housing M11 for introducing cooling water into the upper flow passage VF2 and the lower flow passage VF1, or for discharging fluid from the lower flow passage VF1. The lower housing M11 has a side wall portion M117 that surrounds the shaft axis SC, and a bottom wall portion M118 that forms the bottom surface. The lower housing M11 is configured as an integrally molded product in which the side wall portion M117 and the bottom wall portion M118 are molded integrally.

[0065] The side wall portion M117 has a cylindrical shape surrounding the valve body flow path VF in the shaft circumferential direction DRc and extends along the axial direction DRa. An O-ring M13 is provided on the side wall portion M117 on the upward direction DRa2 side, which is the opening side, to close the gap between the lower housing M11 and the upper housing M12. A bottom wall portion M118 is connected to the downward direction DRa1 side of the side wall portion M117. As shown in FIG. 3, six ports M111, M112, M113, M114, M115, and M116 are connected to the outer periphery of the side wall portion M117.

[0066] Although not shown, a receiving groove for receiving a protrusion of the second fixed disk FD2 is formed on the inside of the side wall portion M117. The protrusion of the second fixed disk FD2 is fitted into the receiving groove of the side wall portion M117, thereby restricting the rotation of the second fixed disk FD2 in the shaft circumferential direction DRc. The rotation stop of the second fixed disk FD2 may be achieved by, for example, a rotation stop pin instead of a protrusion.

[0067] Of the six ports M111, M112, M113, M114, M115, and M116, two ports M111 and M116 are inlet ports that function as inlets for allowing fluid to flow into the valve element flow path VF in the housing M10. In contrast, the remaining four ports M112, M113, M114, and M115 are outlet ports that function as outlets for allowing the fluid that has flowed into the valve element flow path VF in the housing M10 to flow out to the outside of the second multi-way valve MV2. The six ports M111, M112, M113, M114, M115, and M116 are made of tubular members formed to allow fluid to flow inside.

[0068] 4, one of the two inlet ports M111, M116, the port M111, is provided on the upper direction DRa2 side of the lower housing M11, and has a 2-1 opening P21 on the opposite side to the side connected to the side wall portion M117. The other of the two inlet ports M111, M116, the port M116, is provided on the lower direction DRa1 side of the lower housing M11, and has a 2-6 opening P26 on the opposite side to the side connected to the side wall portion M117.

[0069] On the other hand, the four ports M112, M113, M114, and M115, which are outlet ports, are arranged side by side along the shaft circumferential direction DRc on the downward direction DRa1 side of the lower housing M11. The four ports M113, M114, M112, and M115 are arranged in this order from one side to the other side in the shaft circumferential direction DRc. The four ports M113, M114, M112, and M115 each have a 3-3 opening P33, a 3-4 opening P34, a 3-2 opening P32, and a 3-5 opening P35 on the side opposite to the side connected to the side wall portion M117.

[0070] In the following description, of the two ports M111 and M116 that are inlet ports, the inlet port having the 2-1 opening P21 is called the 2-1 port M111, and the inlet port having the 2-6 opening P26 is called the 2-6 port M116. In addition, of the four ports M112, M113, M114, and M115 that are outlet ports, the outlet port having the 2-2 opening P22 is called the 2-2 port M112, and the outlet port having the 2-3 opening P23 is called the 2-3 port M113. In addition, of the four ports M112, M113, M114, and M115 that are outlet ports, the outlet port having the 2-4 opening P24 is called the 2-4 port M114, and the outlet port having the 2-5 opening P25 is called the 2-5 port M115.

[0071] The 2-1 port M111 and the 2-4 port M114 are arranged side by side along the axial direction DRa. The 2-3 port M113, the 2-4 port M114, the 2-2 port M112, the 2-6 port M116, and the 2-5 port M115 are arranged side by side at a predetermined interval along the shaft circumferential direction DRc on the outer periphery of the lower housing M11. The 2-3 port M113, the 2-4 port M114, the 2-2 port M112, the 2-6 port M116, and the 2-5 port M115 are formed on the outer periphery of the lower housing M11 on the downward direction DRa1 side of the second fixed disk FD2 and the second movable disk MD2.

[0072] The 2-1 port M111 is connected to the upper flow passage VF2. The 2-3 port M113, the 2-4 port M114, the 2-2 port M112, the 2-6 port M116, and the 2-5 port M115 are connected to the lower flow passage VF1. The arrangement of the 2-1 port M111, the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, the 2-5 port M115, and the 2-6 port M116 is not limited to this example and can be changed as appropriate.

[0073] As shown in Fig. 6, the bottom wall portion M118 is a portion on which the second fixed disk FD2 is placed and which supports the downward DRa1 side of the shaft M21. The bottom wall portion M118 has a mounting surface M1181 on which the second fixed disk FD2 is placed on the upward DRa2 side, and the second fixed disk FD2 is placed on the mounting surface M1181. A gasket M14 is placed on the mounting surface M1181 to seal a gap between the second fixed disk FD2 and the mounting surface M1181. The bottom wall portion M118 also has a bearing hole M1182 which supports the shaft M21. The downward DRa1 side of the shaft M21 is fitted into the bearing hole M1182, which rotatably supports the shaft M21.

[0074] The bottom wall portion M118 is provided with steps corresponding to five communication holes FD22, FD23, FD24, FD25, and FD26 of the second fixed disk FD2, which will be described later. That is, the bottom wall portion M118 is recessed in the downward direction DRa1 at a portion facing the five communication holes FD22, FD23, FD24, FD25, and FD26 of the second fixed disk FD2, which will be described later. The portion of the bottom wall portion M118 facing the five communication holes FD22, FD23, FD24, FD25, and FD26 of the second fixed disk FD2 is a portion that forms the lower flow passage VF1. That is, the five lower flow passages VF1 are formed in the bottom wall portion M118. These five lower flow passages VF1 correspond to any of the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, the 2-5 port M115, and the 2-6 port M116, and communicate with the corresponding inlet port or outlet port. These five lower flow passages VF1 communicate with the five circulation holes FD22, FD23, FD24, FD25, and FD26 of the second fixed disk FD2.

[0075] As shown in Fig. 6, the second fixed disc FD2 is disposed between the installation surface M1181 of the bottom wall portion M118 and the second movable disc MD2. The second fixed disc FD2 is a sealing member that seals the gap between the lower housing M11 and the second movable disc MD2. The second fixed disc FD2 is formed in a disk shape and disposed such that its central axis coincides with the shaft axis SC.

[0076] The second fixed disc FD2 has a seal surface FD2a that contacts the second movable disc MD2 and a support surface FD2b that contacts the installation surface M1181. Further, the second fixed disc FD2 has a fixed disc hole FD2c formed in approximately the center, through which the shaft M21 passes.

[0077] Moreover, the second fixed disk FD2 is formed of a material that has a smaller linear expansion coefficient, excellent wear resistance, and a small friction coefficient compared to the constituent material of the housing M10. For example, the second fixed disk FD2 is formed of a high-hardness material that is harder than the housing M10. Specifically, the second fixed disk FD2 is formed of at least one of phenol, resin, and ceramic. The second fixed disk FD2 of this embodiment is formed of ceramic.

[0078] Only the portion of the second fixed disc FD2 that forms the seal surface FD2a on which the second movable disc MD2 slides may be made of a material, such as ceramic, that has a smaller linear expansion coefficient and better wear resistance than the material of the housing M10. The second fixed disc FD2 may also be formed by combining a plurality of components.

[0079] The second fixed disc FD2 is provided in the housing M10 so as not to rotate relative to the shaft circumferential direction DRc. As a specific example, the second fixed disc FD2 has a protrusion that protrudes outward in the shaft radial direction DRr. The protrusion is fitted into a receiving groove (not shown) formed on the inner periphery of the side wall portion M117, so that the second fixed disc FD2 cannot rotate in the shaft circumferential direction DRc in conjunction with the rotation of the shaft M21.

[0080] In addition, as shown in FIG. 7, the second fixed disk FD2 of this embodiment has five through holes FD22, FD23, FD24, FD25, and FD26 that penetrate in the axial direction DRa. The second fixed disk FD2 has five second partition portions FD2d that are provided between the five through holes FD22, FD23, FD24, FD25, and FD26. The five through holes FD22, FD23, FD24, FD25, and FD26 are formed penetrating the second fixed disk FD2 in the axial direction DRa, and allow the fluid to pass through. The five through holes FD22, FD23, FD24, FD25, and FD26 and the five second partition portions FD2d are alternately arranged in the shaft circumferential direction DRc around the entire circumference of the second fixed disk FD2. The five communication holes FD22, FD23, FD24, FD25, and FD26 are formed so that the cross section in the direction perpendicular to the axial direction DRa has a substantially sector shape.

[0081] The five communication holes FD22, FD23, FD24, FD25, and FD26 communicate with any of the five lower flow passages VF1 formed in the bottom wall portion M118. That is, the five communication holes FD22, FD23, FD24, FD25, and FD26 communicate with the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, the 2-5 port M115, and the 2-6 port M116, which communicate with the lower flow passage VF1.

[0082] In the following description, of the five through holes FD22, FD23, FD24, FD25, and FD26, the one communicating with the 2-2 port M112 is referred to as the 2-2 through hole FD22, and the one communicating with the 2-3 port M113 is referred to as the 2-3 through hole FD23. The one communicating with the 2-4 port M114 is referred to as the 2-4 through hole FD24, the one communicating with the 2-5 port M115 is referred to as the 2-5 through hole FD25, and the one communicating with the 2-6 port M116 is referred to as the 2-6 through hole FD26. In this embodiment, the 2-2 through hole FD22, the 2-4 through hole FD24, the 2-3 through hole FD23, the 2-5 through hole FD25, and the 2-6 through hole FD26 are arranged in this order along the shaft circumferential direction DRc.

[0083] As shown in Fig. 6, the second movable disc MD2 is provided in the lower housing M11 and is in surface contact with the seal surface FD2a of the second fixed disc FD2. As shown in Fig. 6 and Fig. 8, the second movable disc MD2 in this embodiment is formed in a disk shape with an outer diameter substantially the same as that of the second fixed disc FD2, and is disposed so that its central axis coincides with the shaft axis SC.

[0084] The second movable disc MD2 has a sliding surface MD2a that slides against the second fixed disc FD2. The second movable disc MD2 also has a movable disc hole MD2b formed in the approximate center thereof for inserting the shaft M21 therethrough, and two press-fit grooves MD2c into which the levers M30 described below are press-fitted.

[0085] Similarly to the second fixed disc FD2, the second movable disc MD2 is made of a material that has a smaller linear expansion coefficient, better wear resistance, and a smaller friction coefficient than the material of the housing M10. For example, the second movable disc MD2 is made of a high-hardness material that is harder than the housing M10. Specifically, the second movable disc MD2 is made of at least one of phenol, resin, and ceramic. The second movable disc MD2 of this embodiment is made of ceramic, which is the same material as the second fixed disc FD2.

[0086] Only the portion of the second movable disc MD2 that forms the sliding surface MD2a that slides against the second fixed disc FD2 may be made of a material, such as ceramic, that has a smaller linear expansion coefficient and better wear resistance than the material of the housing M10. The second movable disc MD2 may be formed by combining a plurality of components.

[0087] The second movable disc MD2 has an outer diameter smaller than the inner diameter of the lower housing M11 and is rotatable about the shaft axis SC of the shaft M21. The second movable disc MD2 has one second through hole MD21 that passes through the second movable disc MD2 in the axial direction DRa and one second communication hole MD22 that does not pass through the second movable disc MD2.

[0088] The second through hole MD21 and the second communication hole MD22 have a cross section perpendicular to the axial direction DRa that is generally fan-shaped, as shown in Fig. 9. The second through hole MD21 and the second communication hole MD22 have cross sections perpendicular to the axial direction DRa that are generally equal to each other.

[0089] The second through hole MD21 is formed penetrating the second movable disc MD2 and is formed to allow fluid to pass through. The second through hole MD21 communicates with any of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26 of the second fixed disc FD2 on the downward direction DRa1 side. The second through hole MD21 communicates with the upper flow passage VF2 on the upward direction DRa2 side.

[0090] The second through hole MD21 is formed so that its flow passage cross-sectional area is larger than the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26 of the second fixed disk FD2. The second through hole MD21 is large enough to cover all of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26.

[0091] Furthermore, the second through hole MD21 is formed to be able to communicate with any two or three of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26 depending on the rotational position of the second movable disc MD2. Specifically, when the second through hole MD21 overlaps two of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26 in the axial direction DRa, it communicates with the two through holes it overlaps. Furthermore, when the second through hole MD21 overlaps three of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26 in the axial direction DRa, it is connected to the three through holes it overlaps.

[0092] In other words, the second through hole MD21 rotates in conjunction with the rotation of the shaft M21, and thereby communicates with two or three of the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, the 2-5 port M115, and the 2-6 port M116.

[0093] The second communication hole MD22 is formed by recessing a part of the sliding surface MD2a on the side that slides with the second fixed disk FD2. That is, the second communication hole MD22 is formed without penetrating the second movable disk MD2. The second communication hole MD22 is formed so that its flow passage cross-sectional area is larger than the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26 of the second fixed disk FD2. The second communication hole MD22 is large enough to cover all of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26.

[0094] In this embodiment, the second communication hole MD22 is formed to a size capable of simultaneously covering a portion of any two or three of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26.

[0095] Furthermore, the second communication hole MD22 is formed to be able to communicate with any two or three of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26. Specifically, when the second communication hole MD22 overlaps across any two of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26 in the axial direction DRa, it communicates with the two through holes it straddles. Also, when the second communication hole MD22 overlaps across any three of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26, it communicates with the three through holes it straddles. As a result, among the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25 and the 2-6 through hole FD26, those that communicate via the second communication hole MD22 communicate with each other.

[0096] In other words, the second communication hole MD22 rotates in conjunction with the rotation of the shaft M21, thereby communicating multiple ports among the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, the 2-5 port M115, and the 2-6 port M116.

[0097] Here, an example of a state in which the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26 are partially in communication with the second through hole MD21 and the second communication hole MD22 is shown in Fig. 10. Fig. 10 shows the relative positions of the second through hole MD21 and the second communication hole MD22 with respect to the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26. Specifically, Fig. 10 shows a state in which the second through hole MD21 is in communication with the 2-3 through hole FD23 and the 2-5 through hole FD25, and the second communication hole MD22 is in communication with the 2-2 through hole FD22, the 2-4 through hole FD24, and the 2-6 through hole FD26. In FIG. 10, to make the drawing easier to see, the portion of the second fixed disk FD2 that is covered by the second communication hole MD22 is hatched.

[0098] In this way, when the second movable disc MD2 rotates and stops at a predetermined position, the second through hole MD21 communicates with two or three of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26. The second through hole MD21 communicates with a port corresponding to the through hole it communicates with among the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, the 2-5 port M115, and the 2-6 port M116. As a result, the second through hole MD21 communicates with the port it communicates with among the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, the 2-5 port M115, and the 2-6 port M116 and the 2-1 port M111.

[0099] Furthermore, when the second movable disc MD2 rotates and stops at a predetermined position, the second communication hole MD22 communicates with two or three of the 2-2 communication hole FD22, the 2-3 communication hole FD23, the 2-4 communication hole FD24, the 2-5 communication hole FD25, and the 2-6 communication hole FD26. The second communication hole MD22 then communicates with ports that communicate with the two or three communication holes that it communicates with, among the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, the 2-5 port M115, and the 2-6 port M116. As a result, the second communication hole MD22 communicates with two or three of the ports, the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, the 2-5 port M115, and the 2-6 port M116, which it communicates with.

[0100] In this embodiment, the rotation range of the second movable disk MD2 is predetermined, and the second through hole MD21 can communicate with any two or three of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, and the 2-5 through hole FD25. Among the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, and the 2-5 through hole FD25, the through hole communicating with the second through hole MD21 communicates with the upper flow passage VF2 and the lower flow passage VF1. As a result, the 2-2 port M112, the 2-3 port M113, the 2-4 port M114, and the 2-5 port M115 communicating with the second through hole MD21 communicate with the 2-1 port M111. That is, the 2-2 opening P22 of the 2-2 port M112, the 2-3 opening P23 of the 2-3 port M113, the 2-4 opening P24 of the 2-4 port M114, and the 2-5 opening P25 of the 2-5 port M115 are capable of communicating with the 2-1 opening P21 of the 2-1 port M111 via the second through hole MD21.

[0101] Moreover, the second through hole MD21 cannot communicate with the 2-6 communication hole FD26. That is, the second through hole MD21 cannot communicate between the 2-6 port M116, which communicates with the 2-6 communication hole FD26, and the 2-1 port M111.

[0102] The second communication hole MD22 communicates with the 2-6 communication hole FD26 and can communicate with at least one of the 2-2 communication hole FD22, the 2-4 communication hole FD24, and the 2-5 communication hole FD25. The second communication hole MD22 can connect the 2-6 communication hole FD26 to one or more of the 2-2 communication hole FD22, the 2-4 communication hole FD24, and the 2-5 communication hole FD25. As a result, the 2-6 port M116, which communicates with the 2-6 communication hole FD26, communicates with the 2-2 port M112, the 2-4 port M114, and the 2-5 port M115 via the second communication hole MD22. That is, the 2-6 opening P26 of the 2-6 port M116 can be connected to one or more of the 2-2 opening P22 of the 2-2 port M112, the 2-4 opening P24 of the 2-4 port M114, and the 2-5 opening P25 of the 2-5 port M115 via the second communication hole MD22.

[0103] Additionally, the second communication hole MD22 cannot communicate with the 2-3 flow hole FD23, that is, the 2-6 port M116 cannot communicate with the 2-3 port M113 via the second communication hole MD22.

[0104] The upper housing M12 is a member that covers the opening side of the lower housing M11. As shown in Fig. 6, the upper housing M12 has a bottomed cylindrical shape and includes a lid portion M121 that closes the lower housing M11 and a rib portion M122 that is fitted into the lower housing M11.

[0105] The lid portion M121 is a member that covers the opening of the lower housing M11. The lid portion M121 is formed in a disk shape with an outer diameter that is approximately the same as the outer diameter of the side wall portion M117 of the lower housing M11. The lid portion M121 also has a through hole M123 that supports the shaft M21. The shaft M21 is fitted through the through hole M123 and rotatably supports the shaft M21.

[0106] The rib portion M122 is a portion that is fitted into the opening side of the lower housing M11. The rib portion M122 is cylindrical and provided so as to protrude in the downward direction DRa1 from the surface of the lid portion M121 on the downward direction DRa1 side. The rib portion M122 is formed so that the outer diameter is smaller than the inner diameter of the side wall portion M117 and can be fitted into the opening side of the lower housing M11.

[0107] An O-ring M13 is sandwiched between the outer circumferential surface of the rib portion M122 and the inner circumferential surface of the side wall portion M117. The O-ring M13 is made of urethane rubber, which is an annular elastic body, and is compressed and sandwiched between the rib portion M122 and the side wall portion M117.

[0108] The driving unit M20 is provided on the upper housing M12 on the upward direction DRa2 side. The driving unit M20 is a device for outputting a rotational force for rotating the shaft M21. The driving unit M20 has the shaft M21, a motor (not shown) as a drive source for rotating the shaft M21, and a gear unit (not shown) for transmitting the output of the motor to the shaft M21. For example, a servo motor, a stepping motor, or a brushless motor can be used as the motor. For example, a gear mechanism unit including a helical gear or a spur gear can be used as the gear unit. Although not shown, the motor rotates according to a control signal from a control device 10 electrically connected to the motor.

[0109] The shaft M21 is a rotation axis that rotates around the shaft axis SC by the rotational force output by the driving unit M20. The shaft M21 extends along the axial direction DRa. Both sides of the shaft M21 in the axial direction DRa are rotatably supported by the housing M10. As a specific example, the shaft M21 is rotatably supported on the downward DRa1 side in the bearing hole M1182 of the lower housing M11, and is rotatably supported on the upward DRa2 side by penetrating the through hole M123 of the upper housing M12. That is, the shaft M21 has a double-end support structure.

[0110] The shaft M21 is rotatably supported on a bearing (not shown) provided in a bearing hole M1182 at its downward DRa1 side, and on a bearing (not shown) provided in a through hole M123 at its upward DRa2 side. These bearings may be sliding bearings, ball bearings, or the like.

[0111] The shaft M21 passes through the second fixed disk FD2 and the second movable disk MD2 and is rotatably supported by the lower housing M11 and the upper housing M12. The end of the shaft M21 on the upward direction DRa2 side is connected to a gear portion of the drive unit M20. As a result, the output of the motor is transmitted to the shaft M21 via the gear portion.

[0112] The shaft M21 has a lower shaft center portion M211, an upper shaft center portion M212, and a flange portion M213. The lower shaft center portion M211, the upper shaft center portion M212, and the flange portion M213 are integrally formed, for example, from a metal member, and are formed to be integrally rotatable by a rotational force output by a motor of the driving unit M20. The lower shaft center portion M211 and the upper shaft center portion M212 are connected in this order from the downward direction DRa1 side toward the upward direction DRa2 side. The lower shaft center portion M211 is formed to have a smaller outer diameter than the upper shaft center portion M212. The flange portion M213 is formed at the end portion of the upper shaft center portion M212 on the downward direction DRa1 side.

[0113] The lower axial center portion M211 is a rod-shaped member extending along the axial direction DRa, and is inserted into the second fixed disc FD2 and the second movable disc MD2. The outer diameter of the lower axial center portion M211 is smaller than the inner diameter of the fixed disc hole FD2c of the second fixed disc FD2 and the inner diameter of the movable disc hole MD2b of the second movable disc MD2, and is not directly connected to the second fixed disc FD2 and the second movable disc MD2. In other words, the lower axial center portion M211 is not directly fixed to the second fixed disc FD2 and the second movable disc MD2. For this reason, when the lower axial center portion M211 rotates, the rotational force of the shaft M21 is not directly transmitted to the second movable disc MD2 by the lower axial center portion M211.

[0114] In this embodiment, a lever M30 and a torsion spring M40 for transmitting the rotational force of the shaft M21 to the second movable disc MD2 are provided in the lower housing M11. The second movable disc MD2 is connected to the lower shaft portion M211 via the lever M30 and the torsion spring M40. The torsion spring M40 is disposed around the lower shaft portion M211 between the lever M30 and the flange portion M213.

[0115] The upper shaft portion M212 is a rod-shaped member extending along the axial direction DRa, and is inserted into the upper housing M12. A compression spring M50 is disposed around the upper shaft portion M212.

[0116] The flange portion M213 is a portion that supports the torsion spring M40 and the compression spring M50. The flange portion M213 protrudes outward in the shaft radial direction DRr from the end portion on the downward direction DRa1 side of the outer circumferential surface of the upper axial portion M212, and is formed in the shape of an annular thin plate having a plate surface in the axial direction DRa.

[0117] The flange portion M213 has a hook portion (not shown) on the downward direction DRa1 side that faces the shaft circumferential direction DRc of the torsion spring M40 and supports one end of the torsion spring M40 in the shaft circumferential direction DRc. The flange portion M213 also supports the end of the compression spring M50 on the downward direction DRa1 side.

[0118] The lever M30 is a connecting member that connects the shaft M21 and the second movable disc MD2 via the torsion spring M40. The lever M30 is fixed to the second movable disc MD2, and connects the second movable disc MD2 and the shaft M21 so as to be rotatable together while allowing the second movable disc MD2 to be displaced in the axial direction DRa.

[0119] The lever M30 is substantially disk-shaped with its thickness direction in the axial direction DRa, and has a protrusion (not shown) press-fitted into the press-fit groove MD2c of the second movable disc MD2 and a receiving portion (not shown) facing the shaft circumferential direction DRc of the torsion spring M40. The lever M30 is connected to the second movable disc MD2 with the protrusion pressed into the press-fit groove MD2c. The lever M30 also supports an end of the torsion spring M40 opposite to the side supported by the flange portion M213 in the shaft circumferential direction DRc.

[0120] The torsion spring M40 is a torsion coil spring that biases the second movable disc MD2 in one direction in the shaft circumferential direction DRc relative to the housing M10. The torsion spring M40 is formed by being wound in a coil shape around the lower axial center portion M211. The inner diameter of the torsion spring M40 is larger than the outer diameter of the lower axial center portion M211. The end of the torsion spring M40 on the downward direction DRa1 side in the axial center direction DRa is connected to the engagement portion of the lever M30 so as not to rotate relative to the lever M30, and the end of the torsion spring M40 on the upward direction DRa2 side in the axial center direction DRa is connected to the hook portion of the flange portion M213 so as not to rotate relative to the lever M30. The torsion spring M40 is arranged in a state in which it is twisted in the shaft circumferential direction DRc and elastically deformed.

[0121] As a result, the torsion spring M40 generates a biasing force that biases the second movable disc MD2 to one side in the shaft circumferential direction DRc by its own elastic deformation. Then, when the rotational force generated by the drive part M20 is transmitted to the shaft M21, the rotational force is transmitted to the second movable disc MD2 via the flange part M213, the torsion spring M40, and the lever M30. Then, the second movable disc MD2 rotates integrally with the shaft M21 about the shaft axis SC in conjunction with the rotation of the shaft M21.

[0122] The compression spring M50 is an elastic member that biases the second movable disc MD2 in the axial direction DRa. Specifically, the compression spring M50 is a compression coil spring that can be elastically deformed in the axial direction DRa by being compressed in the axial direction DRa. The compression spring M50 is formed by being wound in a coil shape around the upper axial portion M212. The inner diameter of the compression spring M50 is larger than the outer diameter of the upper axial portion M212, and the outer diameter is smaller than the inner diameter of the torsion spring M40. The compression spring M50 has an end on the upward direction DRa2 side supported by the upper housing M12, and an end on the downward direction DRa1 side supported by the flange portion M213. The compression spring M50 is disposed between the upper housing M12 and the flange portion M213 in a compressed and elastically deformed state.

[0123] As a result, the compression spring M50 urges the flange M213, the torsion spring M40, and the lever M30 in the downward direction DRa1 by its own elastic deformation, thereby generating an urging force that urges the second movable disc MD2 in the downward direction DRa1. Therefore, when the second movable disc MD2 rotates integrally with the shaft M21 due to the urging force of the compression spring M50, the sliding surface MD2a slides against the seal surface FD2a in a state where it is pressed against the seal surface FD2a.

[0124] The control device 10 is a computer having a memory, which is a non-transient tangible storage medium, a processor, and the like. The control device 10 executes a computer program stored in the memory and executes various control processes according to the computer program. The control device 10 executes the computer program stored in the memory and transmits a control signal to the second multi-way valve MV2 to change the rotational position of the shaft M21. The second multi-way valve MV2 changes the rotational position of the second movable disk MD2 based on the control signal transmitted from the control device 10.

[0125] In the second multi-way valve MV2 configured in this manner, the 2-1 opening P21 and the 2-6 opening P26, which are cooling water inlets, are opened and closed depending on the rotational position of the second movable disc MD2. In addition, in the second multi-way valve MV2, the 2-2 opening P22, the 2-3 opening P23, the 2-4 opening P24, and the 2-5 opening P25, which are cooling water outlets, are opened and closed depending on the rotational position of the second movable disc MD2. In the second multi-way valve MV2, the 2-1 opening P21 and the 2-6 opening P26 communicate with the 2-2 opening P22, the 2-3 opening P23, the 2-4 opening P24, and the 2-5 opening P25 depending on the rotational position of the second movable disc MD2.

[0126] Specifically, the 2-1 opening P21 communicates with any two or three of the 2-2 opening P22, the 2-3 opening P23, the 2-4 opening P24, and the 2-5 opening P25 depending on the rotational position of the second movable disc MD2. Also, the 2-6 opening P26 communicates with any one or two of the 2-2 opening P22, the 2-4 opening P24, and the 2-5 opening P25 depending on the rotational position of the second movable disc MD2.

[0127] The rotational position of the second movable disc MD2 of the second multi-way valve MV2 is adjusted by the control device 10 in accordance with each operation mode of the temperature adjustment device. That is, the cooling water outlet communicating with the cooling water inlet in the second multi-way valve MV2 is changed in accordance with each operation mode of the temperature adjustment device.

[0128] The above is a detailed description of the structure of the second multi-way valve MV2. The first multi-way valve MV1 and the third multi-way valve MV3 have the same basic structure as the second multi-way valve MV2. However, the first multi-way valve MV1 and the third multi-way valve MV3 differ from the second multi-way valve MV2 in the number of cooling water outlets.

[0129] For this reason, the first multi-way valve MV1 has a first fixed disc FD1 with a different shape from the second fixed disc FD2 in accordance with the number of cooling water outlets. Also, the first multi-way valve MV1 has a first movable disc MD1 with a different shape from the second movable disc MD2.

[0130] The third multi-way valve MV3 has a third fixed disc FD3 with a different shape from the second fixed disc FD2 in accordance with the number of cooling water outlets. Also, the third multi-way valve MV3 has a third movable disc MD3 with a different shape from the second movable disc MD2.

[0131] 11, the first fixed disk FD1 has a 1-2 through hole FD12 communicating with the 1-2 opening P12, a 1-3 through hole FD13 communicating with the 1-3 opening P13, and a 1-4 through hole FD14 communicating with the 1-4 opening P14. The first fixed disk FD1 also has three first partition portions FD1d provided between the 1-2 through hole FD12, the 1-3 through hole FD13, and the 1-4 through hole FD14. In this embodiment, the 1-2 through hole FD12, the 1-3 through hole FD13, and the 1-4 through hole FD14 are arranged in this order along the shaft circumferential direction DRc.

[0132] As shown in FIG. 12, the first movable disc MD1 has one first through hole MD11 that penetrates the first movable disc MD1 in the axial direction DRa, and one first communicating hole MD12 that does not penetrate the first movable disc MD1.

[0133] The first multi-way valve MV1 opens and closes the 1-1 opening P11 and the 1-4 opening P14, which are cooling water inlets, depending on the rotational position of the first movable disc MD1. The first multi-way valve MV1 opens and closes the 1-2 opening P12 and the 1-3 opening P13, which are cooling water outlets, depending on the rotational position of the first movable disc MD1. The first multi-way valve MV1 connects the 1-1 opening P11 and the 1-4 opening P14 to the 1-2 opening P12 and the 1-3 opening P13 depending on the rotational position of the first movable disc MD1.

[0134] As shown in FIG. 13, the third fixed disk FD3 has a 3-2 through hole FD32 communicating with the 3-2 opening P32, a 3-3 through hole FD33 communicating with the 3-3 opening P33, and a 3-4 through hole FD34 communicating with the 3-4 opening P34. Furthermore, the third fixed disk FD3 has a 3-5 through hole FD35 communicating with the 3-5 opening P35. The third fixed disk FD3 also has four third partition portions FD3d provided between the 3-2 through hole FD32, the 3-3 through hole FD33, the 3-4 through hole FD34, and the 3-5 through hole FD35. In this embodiment, the 3-2 through hole FD32, the 3-5 through hole FD35, the 3-3 through hole FD33, and the 3-4 through hole FD34 are arranged in this order along the shaft circumferential direction DRc.

[0135] As shown in FIG. 14, the third movable disc MD3 has one third through hole MD31 that penetrates the third movable disc MD3 in the axial direction DRa, and one third communicating hole MD32 that does not penetrate the first movable disc MD1.

[0136] The third multi-way valve MV3 opens and closes the 3-1 opening P31 and the 3-3 opening P33, which are cooling water inlets, depending on the rotational position of the third movable disc MD3. The third multi-way valve MV3 opens and closes the 3-2 opening P32, the 3-4 opening P34, and the 3-5 opening P35, which are cooling water outlets, depending on the rotational position of the third movable disc MD3. The third multi-way valve MV3 connects the 3-1 opening P31 and the 3-3 opening P33 to the 3-2 opening P32, the 3-4 opening P34, and the 3-5 opening P35 depending on the rotational position of the third movable disc MD3.

[0137] Next, the operation modes of the temperature adjustment device of this embodiment will be described. The temperature adjustment device of this embodiment can cool and heat the vehicle interior using a vehicle air conditioner by switching the operation mode. The temperature adjustment device can also cool and heat the battery BT, which is a connected device connected to the fluid circuit system 1. The temperature adjustment device can also discard heat generated by the driving heat generating part PT, which is a connected device connected to the temperature adjustment device, and can also cool the driving heat generating part PT. The operation mode switching is performed by the control device 10. Below, six representative operation modes among the operation modes performed by the temperature adjustment device of this embodiment will be described with reference to Figs. 15 to 20. In Figs. 15 to 20, the flow of the cooling water circulating in the fluid circuit system 1 is indicated by an arrow thicker than the arrow indicating the fluid circuit FC.

[0138] Note that the following description of the six operating modes does not include an operating mode for heating the battery BT, but the temperature adjustment device of this embodiment is also capable of heating the battery BT by guiding heated cooling water to the battery BT.

[0139] (1) Mode 1-1 The 1-1 mode is an operation mode in which the vehicle interior is heated by utilizing the heat of the driving heat generating part PT that generates heat during operation, without cooling or heating the battery BT. In the 1-1 mode, the fluid circuit system 1 circulates the cooling water as shown in Fig. 15. Specifically, in the 1-1 mode, the fluid circuit system 1 operates the first pump P1 to circulate the cooling water between the chiller CH and the driving heat generating part PT using the CV1-P26 flow path FC9, the P24-P14 flow path FC4, and the P13-CV1 flow path FC3.

[0140] The driving heat generating part PT heats the coolant circulating in the fluid circuit FC by using heat generated by the operation of the driving heat generating part PT itself to heat the coolant. The chiller CH heats the low-pressure refrigerant that has passed through the second expansion valve 2c of the refrigeration cycle 2 by heat exchange between the low-pressure refrigerant and the coolant.

[0141] Also, in the 1-1 mode, the fluid circuit system 1 operates the third pump P3 to circulate the coolant between the water-cooled condenser WC and the heater core HC using the P32-CV3 flow path FC11 and the CV3-P31 flow path FC10.

[0142] The water-cooled condenser WC heats the coolant by exchanging heat between the high-temperature, high-pressure refrigerant discharged from the compressor 2a of the refrigeration cycle 2 and the coolant circulating in the fluid circuit FC. The heater core HC heats the blown air by exchanging heat between the coolant heated in the water-cooled condenser WC and the blown air flowing in the air-conditioning case. The blown air heated by the heater core HC is then blown into the vehicle cabin to heat the vehicle cabin.

[0143] In the 1-1 mode, since cooling water is not circulated through the battery BT, the battery BT is not heated or cooled.

[0144] When the fluid circuit system 1 circulates the cooling water in this way, the first multi-way valve MV1 needs to adjust the rotational position of the first movable disc MD1 to connect the 1-4 opening P14, which is the cooling water inlet, to the 1-3 opening P13, which is the cooling water outlet. The second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to connect the 2-6 opening P26, which is the cooling water inlet, to the 2-4 opening P24, which is the cooling water outlet. The third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to connect the 3-1 opening P31, which is the cooling water inlet, to the 3-2 opening P32, which is the cooling water outlet.

[0145] (2) Mode 1-2 The 1-2 mode is an operation mode in which the vehicle interior is heated without cooling or heating the battery BT and the driving heat generating part PT. In the 1-2 mode, the fluid circuit system 1 circulates the cooling water as shown in Fig. 16. Specifically, in the 1-2 mode, the fluid circuit system 1 operates the first pump P1 and the second pump P2 to circulate the cooling water between the radiator LT and the chiller CH using the P25-CV1 flow path FC8, the CV1-P26 flow path FC9, the P22-P33 flow path FC6, the P34-CV2 flow path FC12, and the CV2-P21 flow path FC5.

[0146] The radiator LT absorbs heat from the outside air and heats the coolant circulating in the fluid circuit FC. The chiller CH exchanges heat between the coolant heated by absorbing heat from the outside air and the refrigerant circulating in the refrigeration cycle 2, thereby heating the refrigerant.

[0147] In the 1-2 mode, the fluid circuit system 1 operates the third pump P3 to circulate the coolant between the water-cooled condenser WC and the heater core HC using the P32-CV3 flow path FC11 and the CV3-P31 flow path FC10. The water-cooled condenser WC exchanges heat between the high-temperature, high-pressure refrigerant discharged from the compressor 2a of the refrigeration cycle 2 and the coolant circulating in the fluid circuit FC to heat the coolant. The heater core HC exchanges heat between the coolant heated in the water-cooled condenser WC and the blown air flowing in the air-conditioning case to heat the blown air. The blown air heated by the heater core HC is then blown into the vehicle interior to heat the vehicle interior.

[0148] In the 1-2 mode, cooling water is not circulated to the battery BT and the driving heat generating part PT, so the battery BT and the driving heat generating part PT are not heated or cooled. In this case, heat generated by the operation of the driving heat generating part PT is stored in the driving heat generating part PT. In the 1-2 mode, cooling water is not circulated to the battery BT. Therefore, the battery BT is not heated or cooled.

[0149] When the fluid circuit system 1 circulates the cooling water in this way, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to communicate the 2-1 opening P21, which is the cooling water inlet, with the 2-5 opening P25, which is the cooling water outlet. Furthermore, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to communicate the 2-6 opening P26, which is the cooling water inlet, with the 2-2 opening P22, which is the cooling water outlet. Furthermore, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-1 opening P31, which is the cooling water inlet, with the 3-2 opening P32, which is the cooling water outlet. Furthermore, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-3 opening P33, which is the cooling water inlet, with the 3-4 opening P34, which is the cooling water outlet.

[0150] (3) Modes 1-3 The 1-3 mode is an operation mode in which the vehicle cabin is cooled without cooling or heating the battery BT and the driving heat generating part PT. In the 1-3 mode, the fluid circuit system 1 circulates the cooling water as shown in Fig. 17. Specifically, in the 1-3 mode, the fluid circuit system 1 operates the second pump P2 and the third pump P3 to circulate the cooling water between the water-cooled condenser WC and the radiator LT using the CV2-P21 flow path FC5, the P23-CV3 flow path FC7, the CV3-P31 flow path FC10, and the P34-CV2 flow path FC12.

[0151] The water-cooled condenser WC cools the refrigerant and heats the coolant by exchanging heat between the high-temperature, high-pressure refrigerant discharged from the compressor 2a of the refrigeration cycle 2 and the coolant circulating in the fluid circuit FC. The radiator LT cools the coolant by exchanging heat between the coolant heated by the water-cooled condenser WC and outside air.

[0152] In addition, in the 1-3 mode, cooling water is not circulated to the battery BT and the driving heat generating part PT, so the battery BT and the driving heat generating part PT are not heated or cooled. In this case, heat generated by the operation of the driving heat generating part PT is stored in the driving heat generating part PT. In addition, in the 1-3 mode, cooling water is not circulated to the battery BT. Therefore, the battery BT is not heated or cooled.

[0153] When the fluid circuit system 1 circulates the cooling water in this way, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to connect the 2-1 opening P21, which is the cooling water inlet, to the 2-3 opening P23, which is the cooling water outlet. Also, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to connect the 3-1 opening P31, which is the cooling water inlet, to the 3-4 opening P34, which is the cooling water outlet.

[0154] (4) Modes 1-4 The 1-4 mode is an operation mode in which the vehicle cabin is cooled and the driving heat generating part PT is cooled without cooling or heating the battery BT. In the 1-4 mode, the fluid circuit system 1 circulates the cooling water as shown in Fig. 18. Specifically, in the 1-4 mode, the fluid circuit system 1 operates the second pump P2 and the third pump P3 to circulate the cooling water between the water-cooled condenser WC, the radiator LT, and the driving heat generating part PT using the P12-CV2 flow path FC2, the CV2-P21 flow path FC5, the P24-P14 flow path FC4, the P23-CV3 flow path FC7, the CV3-P31 flow path FC10, and the P34-CV2 flow path FC12.

[0155] The water-cooled condenser WC exchanges heat between the high-temperature, high-pressure refrigerant discharged from the compressor 2a of the refrigeration cycle 2 and the cooling water circulating in the fluid circuit FC, thereby cooling the refrigerant and heating the cooling water. The radiator LT exchanges heat between the cooling water heated by the water-cooled condenser WC and outside air, thereby cooling the cooling water. The driving heat generating part PT is cooled by exchanging heat with the cooling water cooled by the water-cooled condenser WC.

[0156] In the 1-4th mode, since cooling water is not circulated through the battery BT, the battery BT is not heated or cooled.

[0157] When the fluid circuit system 1 circulates the cooling water in this way, the first multi-way valve MV1 needs to adjust the rotational position of the first movable disc MD1 to communicate the 1-4 opening P14, which is the cooling water inlet, with the 1-2 opening P12, which is the cooling water outlet. The second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to communicate the 2-1 opening P21, which is the cooling water inlet, with the 2-3 opening P23 and the 2-4 opening P24, which are the cooling water outlet. The third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-1 opening P31, which is the cooling water inlet, with the 3-4 opening P34, which is the cooling water outlet.

[0158] (5) Modes 1-5 The 1-5 mode is an operation mode in which the vehicle interior is cooled and the battery BT and the driving heat generating part PT are cooled. In the 1-5 mode, the fluid circuit system 1 circulates the cooling water as shown in Fig. 19. Specifically, in the 1-5 mode, the fluid circuit system 1 operates the second pump P2 and the third pump P3 to circulate the cooling water between the water-cooled condenser WC, the radiator LT, the driving heat generating part PT, and the battery BT using the P12-CV2 flow path FC2, the CV2-P21 flow path FC5, the P24-P14 flow path FC4, the P23-CV3 flow path FC7, the CV3-P31 flow path FC10, the P34-CV2 flow path FC12, the P22-P33 flow path FC6, and the P35-P11 flow path FC1.

[0159] The water-cooled condenser WC exchanges heat between the high-temperature, high-pressure refrigerant discharged from the compressor 2a of the refrigeration cycle 2 and the cooling water circulating in the fluid circuit FC, thereby cooling the refrigerant and heating the cooling water. The radiator LT exchanges heat between the cooling water heated by the water-cooled condenser WC and the outside air, thereby cooling the cooling water. The driving heat generating part PT and the battery BT are cooled by exchanging heat with the cooling water cooled by the radiator LT.

[0160] When the fluid circuit system 1 circulates the cooling water in this way, the first multi-way valve MV1 needs to adjust the rotational position of the first movable disc MD1 to communicate the 1-1 opening P11 and the 1-4 opening P14, which are the cooling water inlet, with the 1-2 opening P12, which is the cooling water outlet. The second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to communicate the 2-1 opening P21, which is the cooling water inlet, with the 2-2 opening P22, the 2-3 opening P23, and the 2-4 opening P24, which are the cooling water outlet. The third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-1 opening P31, which is the cooling water inlet, with the 3-4 opening P34, which is the cooling water outlet. Furthermore, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to connect the 3-3 opening P33, which is the cooling water inlet, with the 3-5 opening P35, which is the cooling water outlet.

[0161] (6) Modes 1-6 The 1-6 mode is an operation mode in which the vehicle interior is cooled and the battery BT and the driving heat generating part PT are cooled. The 1-6 mode is a mode in which the battery BT is cooled further than in the 1-5 mode. In the 1-6 mode, the fluid circuit system 1 circulates the cooling water as shown in FIG. 20. Specifically, in the 1-6 mode, the fluid circuit system 1 operates the first pump P1 to circulate the cooling water between the chiller CH and the battery BT using the P22-P33 flow path FC6, the P35-P11 flow path FC1, the P13-CV1 flow path FC3, and the CV1-P26 flow path FC9.

[0162] The chiller CH absorbs heat from the cooling water circulating in the fluid circuit FC by evaporating the low-pressure refrigerant that has passed through the second expansion valve 2c of the refrigeration cycle 2. The battery BT is cooled by exchanging heat with the cooling water that has been cooled by absorbing heat in the chiller CH.

[0163] In addition, in mode 1-6, the fluid circuit system 1 operates the second pump P2 and the third pump P3 to circulate the cooling water between the water-cooled condenser WC, the radiator LT, and the driving heat generating part PT using the P12-CV2 flow path FC2, the CV2-P21 flow path FC5, the P24-P14 flow path FC4, the P23-CV3 flow path FC7, the CV3-P31 flow path FC10, and the P34-CV2 flow path FC12.

[0164] The water-cooled condenser WC exchanges heat between the high-temperature, high-pressure refrigerant discharged from the compressor 2a of the refrigeration cycle 2 and the cooling water circulating in the fluid circuit FC, thereby cooling the refrigerant and heating the cooling water. The radiator LT exchanges heat between the cooling water heated by the water-cooled condenser WC and the outside air, thereby cooling the cooling water. The driving heat generating part PT is cooled by exchanging heat with the cooling water cooled by the radiator LT.

[0165] When the fluid circuit system 1 circulates the cooling water in this way, the first multi-way valve MV1 needs to adjust the rotational position of the first movable disc MD1 to communicate the 1-1 opening P11, which is the cooling water inlet, with the 1-3 opening P13, which is the cooling water outlet. Furthermore, the first multi-way valve MV1 needs to adjust the rotational position of the first movable disc MD1 to communicate the 1-4 opening P14, which is the cooling water inlet, with the 1-2 opening P12, which is the cooling water outlet. Furthermore, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to communicate the 2-1 opening P21, which is the cooling water inlet, with the 2-3 opening P23 and the 2-4 opening P24, which are the cooling water outlets. Furthermore, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to communicate the 2-6 opening P26, which is the cooling water inlet, with the 2-2 opening P22, which is the cooling water outlet. Also, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to connect the 3-1 opening P31, which is the cooling water inlet, to the 3-4 opening P34, which is the cooling water outlet. Furthermore, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to connect the 3-3 opening P33, which is the cooling water inlet, to the 3-5 opening P35, which is the cooling water outlet.

[0166] It is assumed that the temperature adjustment device can execute such six operation modes. In this case, the fluid circuit system 1 needs to open and close the cooling water inlet through which the cooling water flows into each of the first multi-way valve MV1 to the third multi-way valve MV3, and also needs to open and close the cooling water outlet through which the cooling water flows out, depending on the operation mode. Specifically, the fluid circuit system 1 needs to open the cooling water inlet and the cooling water outlet of each of the first multi-way valve MV1, the second multi-way valve MV2, and the third multi-way valve MV3, which are connected to connected devices that require the cooling water to flow in each operation mode.

[0167] In a circuit system having a plurality of valve devices such as the first multi-way valve MV1 to the third multi-way valve MV3 of the present embodiment, the cooling water inlet and the cooling water outlet that are not connected to the connected devices that require the cooling water to flow are generally blocked. This is to prevent the cooling water from flowing to the connected devices that do not require the cooling water to flow by opening the cooling water inlet and the cooling water outlet that are connected to the connected devices that do not require the cooling water to flow in each operation mode.

[0168] Hereinafter, among the multiple cooling water inlets of each of the first multi-way valve MV1 to the third multi-way valve MV3, the cooling water inlets connected to connected devices that do not require the flow of cooling water will be referred to as unneeded inlets. Also, the cooling water inlets connected to connected devices that do not require the flow of cooling water will be referred to as unneeded outlets.

[0169] For example, in the 1-1 mode in which the cooling water flows through the driving heat generating part PT and the chiller CH, of the 1-1 opening P11 and the 1-4 opening P14 which are the cooling water inlets of the first multi-way valve MV1, the 1-1 opening P11 connected to the battery BT is an unnecessary inlet. Also, in the 1-1 mode, of the 1-2 opening P12 and the 1-3 opening P13 which are the cooling water outlets of the first multi-way valve MV1, the 1-2 opening P12 connected to the radiator LT is an unnecessary inlet.

[0170] In the 1-1 mode in which the cooling water flows through the driving heat generating part PT and the chiller CH, the 2-1 opening P21 connected to the radiator LT is an unnecessary inlet among the 2-1 opening P21 and the 2-6 opening P26 which are the cooling water inlets of the second multi-way valve MV2. In the 1-1 mode, the 2-2 opening P22 connected to the battery BT is an unnecessary outlet among the 2-2 opening P22, the 2-3 opening P23, the 2-4 opening P24, and the 2-5 opening P25 which are the cooling water outlets of the second multi-way valve MV2. In the 1-1 mode, the 2-3 opening P23 connected to the water-cooled condenser WC and the 2-5 opening P25 connected to the chiller CH are unnecessary outlets.

[0171] Here, it is assumed that the fluid circuit system 1 of this embodiment is configured to close all of the unneeded inlets and unneeded outlets of the first to third multi-way valves MV1 to MV3 when the temperature adjustment device executes the six operation modes. A hypothetical configuration of the first to third multi-way valves MV1 to MV3 when such a fluid circuit system 1 closes the unneeded inlets and unneeded outlets of the first to third multi-way valves MV1 to MV3 will be described below. Hereinafter, the configuration of each of the first to third multi-way valves MV1 to MV3 when the fluid circuit system 1 closes the unneeded inlets and unneeded outlets of the first to third multi-way valves MV1 to MV3 is referred to as a closed configuration.

[0172] When the temperature adjustment device executes the 1-1 mode, if the first multi-way valve MV1 is in the closed configuration, the first multi-way valve MV1 communicates the 1-4 opening P14 with the 1-3 opening P13, but needs to close the 1-1 opening P11 and the 1-2 opening P12. Also, if the second multi-way valve MV2 is in the closed configuration, the second multi-way valve MV2 communicates the 2-6 opening P26 with the 2-4 opening P24, but needs to close the 2-2 opening P22, the 2-3 opening P23, and the 2-5 opening P25. And, if the third multi-way valve MV3 is in the closed configuration, the third multi-way valve MV3 communicates the 3-1 opening P31 with the 3-2 opening P32, but needs to close the 3-3 opening P33, the 3-4 opening P34, and the 3-5 opening P35.

[0173] In addition, when the temperature adjustment device executes the 1-2 mode, if the second multi-way valve MV2 is in the closed configuration, the second multi-way valve MV2 communicates the 2-1 opening P21 with the 2-5 opening P25 and communicates the 2-6 opening P26 with the 2-2 opening P22. However, the second multi-way valve MV2 needs to close the 2-3 opening P23 and the 2-4 opening P24. In addition, when the third multi-way valve MV3 is in the closed configuration, the third multi-way valve MV3 communicates the 3-1 opening P31 with the 3-2 opening P32 and communicates the 3-3 opening P33 with the 3-4 opening P34. However, the third multi-way valve MV3 needs to close the 3-5 opening P35.

[0174] In addition, when the temperature adjustment device executes the 1-3 mode and the second multi-way valve MV2 is in the closed configuration, the second multi-way valve MV2 communicates the 2-1 opening P21 with the 2-3 opening P23. However, the second multi-way valve MV2 needs to close the 2-2 opening P22, the 2-4 opening P24, the 2-5 opening P25, and the 2-6 opening P26. In addition, when the third multi-way valve MV3 is in the closed configuration, the third multi-way valve MV3 communicates the 3-1 opening P31 with the 3-4 opening P34, but needs to close the 3-2 opening P32, the 3-3 opening P33, and the 3-5 opening P35.

[0175] In addition, when the temperature adjustment device executes the 1-4 mode and the first multi-way valve MV1 is in the closed configuration, the first multi-way valve MV1 communicates the 1-4 opening P14 with the 1-2 opening P12, but must close the 1-1 opening P11 and the 1-3 opening P13. In addition, when the second multi-way valve MV2 is in the closed configuration, the second multi-way valve MV2 communicates the 2-1 opening P21 with the 2-3 opening P23 and the 2-4 opening P24. However, the second multi-way valve MV2 must close the 2-2 opening P22, the 2-5 opening P25, and the 2-6 opening P26. Furthermore, when the third multi-way valve MV3 is in a closed configuration, the third multi-way valve MV3 connects the 3-1 opening P31 to the 3-4 opening P34, but the 3-2 opening P32, the 3-3 opening P33, and the 3-5 opening P35 must be closed.

[0176] Furthermore, when the temperature adjustment device executes the 1-5 mode and the first multi-way valve MV1 is in the closed configuration, the first multi-way valve MV1 communicates the 1-1 opening P11 and the 1-4 opening P14 with the 1-2 opening P12, but needs to close the 1-3 opening P13. Furthermore, when the second multi-way valve MV2 is in the closed configuration, the second multi-way valve MV2 communicates the 2-1 opening P21 with the 2-2 opening P22, the 2-3 opening P23, and the 2-4 opening P24, but needs to close the 2-5 opening P25 and the 2-6 opening P26. Furthermore, when the third multi-way valve MV3 is in a closed configuration, the third multi-way valve MV3 connects the 3-1 opening P31 to the 3-4 opening P34 and the 3-3 opening P33 to the 3-5 opening P35, but the 3-2 opening P32 must be closed.

[0177] In addition, when the temperature adjustment device executes the 1-6 mode and the second multi-way valve MV2 is in a closed configuration, the second multi-way valve MV2 communicates the 2-1 opening P21 with the 2-3 opening P23 and the 2-4 opening P24. In addition, the second multi-way valve MV2 communicates the 2-6 opening P26 with the 2-2 opening P22. However, the second multi-way valve MV2 needs to close the 2-5 opening P25. In addition, when the third multi-way valve MV3 is in a closed configuration, the third multi-way valve MV3 communicates the 3-1 opening P31 with the 3-4 opening P34 and the 3-3 opening P33 with the 3-5 opening P35, but needs to close the 3-2 opening P32.

[0178] A comparative example in which the first multi-way valve MV1 to the third multi-way valve MV3 are configured to be closed in all six operation modes will be described with reference to the comparative examples in Figs. 21 to 29. Figs. 21 to 29 show a comparative configuration in which the fluid circuit system 1 closes all of the unnecessary inlets and unnecessary outlets of each of the first multi-way valve MV1 to the third multi-way valve MV3 in all six operation modes. In the comparative configuration, the second fixed disk FD2 of the second multi-way valve MV2 is replaced with a comparative second fixed disk CFD2, and the second movable disk MD2 is replaced with a comparative second movable disk CMD2. In addition, the third fixed disk FD3 of the third multi-way valve MV3 is replaced with a comparative third fixed disk CFD3.

[0179] 21, the comparative second fixed disk CFD2 has a different shape from that of the second fixed disk FD2 in terms of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26. The comparative second fixed disk CFD2 is configured to block the unnecessary inlet and the unnecessary outlet in each of the six operating modes.

[0180] Specifically, the comparative second fixed disk CFD2 has smaller sizes of the 2-2 through holes FD22, 2-3 through holes FD23, 2-4 through holes FD24, 2-5 through holes FD25, and 2-6 through holes FD26 than the second fixed disk FD2. The comparative second fixed disk CFD2 has two each of the 2-2 through holes FD22, 2-4 through holes FD24, and 2-6 through holes FD26. Furthermore, the comparative second fixed disk CFD2 has a smaller range in which the through holes are formed than the second fixed disk FD2. That is, the proportion of the through holes in the comparative second fixed disk CFD2 is smaller than that in the second fixed disk FD2.

[0181] The 2-2 communication hole FD22, the 2-4 communication hole FD24, and the 2-6 communication hole FD26, which are formed in pairs, are connected to each other within the housing M10 by a communication mechanism (not shown) provided within the housing M10.

[0182] 22, the comparative second movable disc CMD2 has second through holes MD21 and second communication holes MD22 that are different in shape from the second movable disc MD2. The comparative second movable disc CMD2 corresponds to the comparative second fixed disc CFD2 in which the sizes of the 2-2 through holes FD22, 2-3 through holes FD23, 2-4 through holes FD24, 2-5 through holes FD25, and 2-6 through holes FD26 are smaller than those of the second fixed disc FD2. Specifically, the comparative second movable disc CMD2 has second through holes MD21 and second communication holes MD22 that are smaller in size than those of the second movable disc MD2.

[0183] 23, the comparative third fixed disk CFD3 has a different shape of the 3-3 flow hole FD33 and the 3-5 flow hole FD35 from the third fixed disk FD3. The comparative third fixed disk CFD3 is configured to block the unnecessary inlet and the unnecessary outlet in each of the six operating modes.

[0184] Specifically, the comparative third fixed disk CFD3 has smaller sizes of the 3-3 flow hole FD33 and the 3-5 flow hole FD35 than the third fixed disk FD3. Furthermore, the comparative third fixed disk CFD3 has a smaller area in which the flow holes are formed than the third fixed disk FD3. That is, the proportion of the flow holes in the comparative third fixed disk CFD3 is smaller than that of the third fixed disk FD3.

[0185] The operation modes of the second multi-way valve MV2 having the comparative second fixed disk CFD2 and the comparative second movable disk CMD2 and the third multi-way valve MV3 having the comparative third fixed disk CFD3 will be described with reference to Figs. 24 to 29. Figs. 24 to 29 show the relative positions of the first through hole MD11 and the first communication hole MD12 with respect to the 1-2 through hole FD12, the 1-3 through hole FD13, and the 1-4 through hole FD14 of the first fixed disk FD1 in each of the six operation modes. Figs. 24 to 29 also show the relative positions of the second through hole MD21 and the second communication hole MD22 with respect to the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26 of the comparative second fixed disk CFD2 in each of the six operation modes. 24 to 29 show the relative positions of the third through hole MD31 and the third communication hole MD32 with respect to the 3-2 through hole FD32, the 3-3 through hole FD33, the 3-4 through hole FD34, and the 3-5 through hole FD35 of the comparative third fixed disk CFD3 in each of the six operating modes. In addition, in order to make the drawings easier to see, in Figs. 24 to 29, the area covered by the first communication hole MD12 with respect to the first fixed disk FD1 and the area covered by the second communication hole MD22 with respect to the comparative second fixed disk CFD2 are hatched. Also, the area covered by the third communication hole MD32 with respect to the comparative third fixed disk CFD3 is hatched.

[0186] First, the 1-1 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-1 mode, the first movable disc MD1 is positioned at the rotational position shown in FIG. 24. Specifically, when the operation mode is set to the 1-1 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 faces the first partition portion FD1d. In addition, the first movable disc MD1 is positioned at a position where the first communication hole MD12 communicates with the 1-3 circulation hole FD13 and the 1-4 circulation hole FD14. However, the 1-2 circulation hole FD12 does not face either the first through hole MD11 or the first communication hole MD12.

[0187] As a result, the first through hole MD11 is blocked by the first partition portion FD1d, and the 1-1 opening P11 does not communicate with any of the 1-2 through hole FD12, the 1-3 through hole FD13, and the 1-4 through hole FD14. Therefore, the 1-1 opening P11 is blocked. The 1-4 opening P14 communicates with the 1-3 opening P13 via the 1-4 through hole FD14, the first through hole MD12, and the 1-3 through hole FD13. The 1-2 through hole FD12 does not communicate with any of the first through hole MD11 and the first through hole MD12, and is blocked by the first movable disc MD1. Therefore, the 1-2 opening P12 is blocked.

[0188] When the operation mode of the temperature adjustment device is set to the 1-1 mode, the comparative second movable disk CMD2 is positioned such that the second through hole MD21 faces the second partition portion FD2d. The comparative second movable disk CMD2 is positioned such that the second communication hole MD22 communicates with one of the two 2-6 circulation holes FD26 and one of the two 2-4 circulation holes FD24. However, the two 2-2 circulation holes FD22, the 2-3 circulation hole FD23, the other of the two 2-4 circulation holes FD24, the 2-5 circulation hole FD25, and the other of the two 2-6 circulation holes FD26 do not face any of the second through hole MD21 and the second communication hole MD22.

[0189] As a result, the second through hole MD21 is blocked by the second partition portion FD2d, and the 2-1 opening P21 does not communicate with any of the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26. The 2-6 opening P26 communicates with the 2-4 opening P24 via the one 2-6 through hole FD26, the second through hole MD22, and the one 2-4 through hole FD24. The 2-2 through hole FD22, the 2-3 through hole FD23, and the 2-5 through hole FD25 do not communicate with any of the second through hole MD21 and the second through hole MD22, and are blocked by the comparative second movable disk CMD2. As a result, the 2-2 opening P22, the 2-3 opening P23, and the 2-5 opening P25 are blocked.

[0190] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-1 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-2 communication hole FD32. The third movable disc MD3 is positioned so that the third communication hole MD32 faces the 3-3 communication hole FD33. However, the 3-4 communication hole FD34 and the 3-5 communication hole FD35 do not face either the third through hole MD31 or the third communication hole MD32.

[0191] As a result, the 3-1 opening P31 communicates with the 3-2 opening P32 via the third through hole MD31 and the 3-2 communication hole FD32. Also, the 3-3 communication hole FD33 is blocked by the third communication hole MD32. Therefore, the 3-3 opening P33 is blocked. And the 3-4 communication hole FD34 and the 3-5 communication hole FD35 do not communicate with either the third through hole MD31 or the third communication hole MD32, and are blocked by the third movable disc MD3. Therefore, the 3-4 opening P34 and the 3-5 opening P35 are blocked.

[0192] Next, the 1-2 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-2 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 25. Specifically, when the operation mode is set to the 1-2 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 communicates with the 1-3 communication hole FD13, and the first communication hole MD12 communicates with the 1-2 communication hole FD12. However, the 1-4 communication hole FD14 does not face either the first through hole MD11 or the first communication hole MD12.

[0193] As a result, the 1-1 opening P11 communicates with the 1-3 opening P13 via the first through hole MD11 and the 1-3 communication hole FD13. Also, the 1-2 communication hole FD12 is blocked by the first communication hole MD12. Therefore, the 1-2 opening P12 is blocked. And the 1-4 communication hole FD14 does not communicate with either the first through hole MD11 or the first communication hole MD12, and is blocked by the first movable disc MD1. Therefore, the 1-4 opening P14 is blocked.

[0194] When the operation mode of the temperature adjustment device is set to the 1-2 mode, the comparative second movable disk CMD2 is positioned at a position where the second through hole MD21 communicates with the 2-5 through hole FD25. The comparative second movable disk CMD2 is positioned at a position where the second through hole MD22 communicates with one of the two 2-6 through holes FD26 and one of the two 2-2 through holes FD22. However, the other of the two 2-2 through holes FD22, the 2-3 through hole FD23, the two 2-4 through holes FD24, and the other of the two 2-6 through holes FD26 do not face either the second through hole MD21 or the second through hole MD22.

[0195] As a result, the 2-1 opening P21 communicates with the 2-5 opening P25 via the second through hole MD21 and the 2-5 communication hole FD25. The 2-6 opening P26 communicates with the 2-2 opening P22 via one of the 2-6 communication holes FD26, the second communication hole MD22, and one of the 2-2 communication holes FD22. The 2-3 communication hole FD23 and the 2-4 communication hole FD24 do not communicate with either the second through hole MD21 or the second communication hole MD22, and are blocked by the comparative second movable disc CMD2. As a result, the 2-3 opening P23 and the 2-4 opening P24 are blocked.

[0196] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-2 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-2 communication hole FD32. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-3 communication hole FD33 and the 3-4 communication hole FD34. However, the 3-5 communication hole FD35 does not face either the third through hole MD31 or the third communication hole MD32.

[0197] As a result, the 3-1 opening P31 communicates with the 3-2 opening P32 via the third through hole MD31 and the 3-2 communication hole FD32. The 3-3 opening P33 communicates with the 3-4 opening P34 via the 3-3 communication hole FD33, the third communication hole MD32, and the 3-4 communication hole FD34. The 3-5 communication hole FD35 does not communicate with either the third through hole MD31 or the third communication hole MD32, and is blocked by the third movable disc MD3. Therefore, the 3-5 opening P35 is blocked.

[0198] Next, the 1-3 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-3 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 26. Specifically, when the operation mode is set to the 1-3 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 communicates with the 1-3 communication hole FD13, and the first communication hole MD12 communicates with the 1-2 communication hole FD12. However, the 1-4 communication hole FD14 does not face either the first through hole MD11 or the first communication hole MD12.

[0199] As a result, the 1-1 opening P11 communicates with the 1-3 opening P13 via the first through hole MD11 and the 1-3 communication hole FD13. Also, the 1-2 communication hole FD12 is blocked by the first communication hole MD12. Therefore, the 1-2 opening P12 is blocked. And the 1-4 communication hole FD14 does not communicate with either the first through hole MD11 or the first communication hole MD12, and is blocked by the first movable disc MD1. Therefore, the 1-4 opening P14 is blocked.

[0200] Furthermore, when the operating mode of the temperature adjustment device is set to the 1-3 mode, the comparative second movable disk CMD2 is positioned at a position where the second through hole MD21 communicates slightly with the 2-3 flow hole FD23. Furthermore, the comparative second movable disk CMD2 is positioned at a position where the second communication hole MD22 communicates with one of the two 2-4 flow holes FD24. However, the two 2-2 flow holes FD22, the other of the two 2-4 flow holes FD24, the 2-5 flow hole FD25, and the two 2-6 flow holes FD26 do not face any of the second through hole MD21 and the second communication hole MD22.

[0201] As a result, the 2-1 opening P21 communicates with the 2-3 opening P23 via the second through hole MD21 and the 2-3 communication hole FD23. In addition, one of the two 2-4 communication holes FD24 is blocked by the second communication hole MD22, and the other is blocked by the comparative second movable disk CMD2. Therefore, the 2-4 opening P24 is blocked. And the 2-2 communication hole FD22, the 2-5 communication hole FD25, and the two 2-6 communication holes FD26 do not communicate with either the second through hole MD21 or the second communication hole MD22, and are blocked by the comparative second movable disk CMD2. Therefore, the 2-2 opening P22, the 2-3 opening P23, the 2-5 opening P25, and the 2-6 opening P26 are blocked.

[0202] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-3 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-4 communication hole FD34, and the third communication hole MD32 communicates with the 3-5 communication hole FD35. However, the 3-2 communication hole FD32 and the 3-3 communication hole FD33 do not face either the third through hole MD31 or the third communication hole MD32.

[0203] As a result, the 3-1 opening P31 communicates with the 3-4 opening P34 via the third through hole MD31 and the 3-4 communication hole FD34. Also, the 3-5 communication hole FD35 is blocked by the third communication hole MD32. Therefore, the 3-5 opening P35 is blocked. And the 3-2 communication hole FD32 and the 3-3 communication hole FD33 do not communicate with either the third through hole MD31 or the third communication hole MD32, and are blocked by the third movable disc MD3. Therefore, the 3-2 opening P32 and the 3-3 opening P33 are blocked.

[0204] Next, the 1-4 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-4 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 27. Specifically, when the operation mode is set to the 1-4 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 communicates with the 1-3 flow hole FD13. In addition, the first movable disc MD1 is positioned at a position where the first communication hole MD12 communicates with the 1-2 flow hole FD12 and the 1-4 flow hole FD14.

[0205] As a result, the 1-1 opening P11 communicates with the 1-3 opening P13 via the first through hole MD11 and the 1-3 communication hole FD13. The 1-4 opening P14 communicates with the 1-2 opening P12 via the 1-4 communication hole FD14, the first communication hole MD12, and the 1-2 communication hole FD12.

[0206] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-4 mode, the comparative second movable disk CMD2 is positioned at a position where the second through hole MD21 communicates with the 2-3 flow hole FD23 and one of the two 2-4 flow holes FD24. Furthermore, the comparative second movable disk CMD2 is positioned at a position where the second communication hole MD22 communicates with one of the two 2-2 flow holes FD22. However, the other of the two 2-2 flow hole FD22, the other of the two 2-4 flow hole FD24, the 2-5 flow hole FD25, and the two 2-6 flow holes FD26 do not face any of the second through hole MD21 and the second communication hole MD22.

[0207] As a result, the 2-1 opening P21 communicates with the 2-3 opening P23 through the second through hole MD21 and the 2-3 communication hole FD23, and communicates with the 2-4 opening P24 through the second through hole MD21 and one of the 2-4 communication holes FD24. One of the 2-2 communication holes FD22 is blocked by the second communication hole MD22, and the other 2-2 communication hole FD22 does not communicate with either the second through hole MD21 or the second communication hole MD22, and is blocked by the comparative second movable disk CMD2. Therefore, the 2-2 opening P22 is blocked. And the 2-5 communication hole FD25 and the two 2-6 communication holes FD26 do not communicate with either the second through hole MD21 or the second communication hole MD22, and are blocked by the comparative second movable disk CMD2. Therefore, the 2-5 opening P25 and the 2-6 opening P26 are closed.

[0208] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-4 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-4 communication hole FD34, and the third communication hole MD32 communicates with the 3-5 communication hole FD35. However, the 3-2 communication hole FD32 and the 3-3 communication hole FD33 do not face either the third through hole MD31 or the third communication hole MD32.

[0209] As a result, the 3-1 opening P31 communicates with the 3-4 opening P34 via the third through hole MD31 and the 3-4 communication hole FD34. Also, the 3-5 communication hole FD35 is blocked by the third communication hole MD32. Therefore, the 3-5 opening P35 is blocked. And the 3-2 communication hole FD32 and the 3-3 communication hole FD33 do not communicate with either the third through hole MD31 or the third communication hole MD32, and are blocked by the third movable disc MD3. Therefore, the 3-2 opening P32 and the 3-3 opening P33 are blocked.

[0210] Next, the 1-5 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-5 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 28. Specifically, when the operation mode is set to the 1-5 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 communicates with the 1-2 circulation hole FD12 and the 1-4 circulation hole FD14. In addition, the first movable disc MD1 is positioned at a position where the first communication hole MD12 communicates with the 1-3 circulation hole FD13.

[0211] As a result, the 1-1 opening P11 communicates with the 1-2 opening P12 via the first through hole MD11 and the 1-2 communication hole FD12. The 1-4 opening P14 communicates with the 1-2 opening P12 via the 1-4 communication hole FD14, the first through hole MD11, and the 1-2 communication hole FD12. The 1-3 communication hole FD13 is blocked by the first communication hole MD12. As a result, the 1-3 opening P13 is blocked.

[0212] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-5 mode, the comparative second movable disk CMD2 is positioned at a position where the second through hole MD21 communicates with the 2-3 flow hole FD23 and one of the two 2-2 flow holes FD22 and the 2-4 flow hole FD24. Furthermore, the comparative second movable disk CMD2 is positioned at a position where the second communication hole MD22 communicates with the 2-5 flow hole FD25. However, the other of the two 2-2 flow hole FD22, the other of the two 2-4 flow hole FD24, and the two 2-6 flow holes FD26 do not face either the second through hole MD21 or the second communication hole MD22.

[0213] As a result, the 2-1 opening P21 communicates with the 2-2 opening P22 through the second through hole MD21 and one of the 2-2 communication holes FD22, and communicates with the 2-3 opening P23 through the second through hole MD21 and one of the 2-3 communication holes FD23. Furthermore, the 2-1 opening P21 communicates with the 2-4 opening P24 through the second through hole MD21 and one of the 2-4 communication holes FD24. In addition, the 2-5 communication hole FD25 is blocked by the second communication hole MD22. Therefore, the 2-5 opening P25 is blocked. And the two 2-6 communication holes FD26 do not communicate with either the second through hole MD21 or the second communication hole MD22, and are blocked by the comparative second movable disk CMD2. Therefore, the 2-6 opening P26 is blocked.

[0214] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-5 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-4 communication hole FD34. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-3 communication hole FD33 and the 3-5 communication hole FD35. However, the 3-2 communication hole FD32 does not face either the third through hole MD31 or the third communication hole MD32.

[0215] As a result, the 3-1 opening P31 communicates with the 3-4 opening P34 via the third through hole MD31 and the 3-4 communication hole FD34. The 3-3 opening P33 communicates with the 3-5 opening P35 via the 3-3 communication hole FD33, the third communication hole MD32, and the 3-5 communication hole FD35. The 3-2 communication hole FD32 does not communicate with either the third through hole MD31 or the third communication hole MD32, and is blocked by the third movable disc MD3. As a result, the 3-2 opening P32 is blocked.

[0216] Next, the 1-6 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-6 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 29. Specifically, when the operation mode is set to the 1-6 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 communicates with the 1-3 flow hole FD13. In addition, the first movable disc MD1 is positioned at a position where the first communication hole MD12 communicates with the 1-2 flow hole FD12 and the 1-4 flow hole FD14.

[0217] As a result, the 1-1 opening P11 communicates with the 1-3 opening P13 via the first through hole MD11 and the 1-3 communication hole FD13. The 1-4 opening P14 communicates with the 1-2 opening P12 via the 1-4 communication hole FD14, the first communication hole MD12, and the 1-2 communication hole FD12.

[0218] When the operation mode of the temperature adjustment device is set to the 1-6 mode, the comparative second movable disk CMD2 is positioned such that the second through hole MD21 is slightly in communication with the 2-3 flow hole FD23 and one of the two 2-4 flow holes FD24. The comparative second movable disk CMD2 is positioned such that the second communication hole MD22 is slightly in communication with the one of the two 2-2 flow holes FD22 and one of the two 2-6 flow holes FD26. However, the other of the two 2-2 flow holes FD22, the other of the two 2-4 flow holes FD24, the 2-5 flow hole FD25, and the other of the two 2-6 flow holes FD26 do not face either the second through hole MD21 or the second communication hole MD22.

[0219] As a result, the 2-1 opening P21 communicates with the 2-3 opening P23 via the second through hole MD21 and the 2-3 communication hole FD23, and also communicates with the 2-4 opening P24 via the second through hole MD21 and one of the 2-4 communication holes FD24. The 2-6 opening P26 communicates with the 2-2 opening P22 via one of the 2-6 communication holes FD26, the second communication hole MD22, and one of the 2-2 communication holes FD22. The 2-5 communication hole FD25 does not communicate with either the second through hole MD21 or the second communication hole MD22, and is blocked by the comparative second movable disc CMD2. As a result, the 2-5 opening P25 is blocked.

[0220] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-6 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-4 communication hole FD34. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-3 communication hole FD33 and the 3-5 communication hole FD35. However, the 3-2 communication hole FD32 does not face either the third through hole MD31 or the third communication hole MD32.

[0221] As a result, the 3-1 opening P31 communicates with the 3-4 opening P34 via the third through hole MD31 and the 3-4 communication hole FD34. The 3-3 opening P33 communicates with the 3-5 opening P35 via the 3-3 communication hole FD33, the third communication hole MD32, and the 3-5 communication hole FD35. The 3-2 communication hole FD32 does not communicate with either the third through hole MD31 or the third communication hole MD32, and is blocked by the third movable disc MD3. As a result, the 3-2 opening P32 is blocked.

[0222] In this way, even when the fluid circuit system 1 includes the second multi-way valve MV2 having the comparative second fixed disk CFD2 and the comparative second movable disk CMD2, and the third multi-way valve MV3 having the comparative third fixed disk CFD3, the six operation modes of the temperature adjustment device can be accommodated. However, if the second multi-way valve MV2 and the third multi-way valve MV3 are configured in a closed state, there is a risk of large pressure loss occurring when the cooling water flows through the second multi-way valve MV2 and the third multi-way valve MV3.

[0223] For example, the sizes of the 2-2 flow holes FD22, 2-3 flow holes FD23, 2-4 flow holes FD24, 2-5 flow holes FD25, and 2-6 flow holes FD26 formed in the comparative second fixed disk CFD2 are smaller than those of the second fixed disk FD2. Therefore, there is a risk that the pressure loss when the cooling water passes through each of the 2-2 flow holes FD22, 2-3 flow holes FD23, 2-4 flow holes FD24, 2-5 flow holes FD25, and 2-6 flow holes FD26 will be larger than that of the second fixed disk FD2 of this embodiment.

[0224] As described above, the comparative second fixed disk CFD2 is formed with two each of the 2-2 flow holes FD22, the 2-4 flow holes FD24, and the 2-6 flow holes FD26. For this reason, for example, when the second through hole MD21 or the second communication hole MD22 is communicated with the 2-2 flow hole FD22 to pass the cooling water, there is a risk of a larger pressure loss than when the cooling water is passed through the 2-2 flow hole FD22 of the second fixed disk FD2 of this embodiment.

[0225] The comparative second fixed disk CFD2 has a larger number of 2-2 flow holes FD22, 2-4 flow holes FD24, and 2-6 flow holes FD26 than the second fixed disk FD2 of the present embodiment. Therefore, the structure of the comparative second fixed disk CFD2 is more complicated than the second fixed disk FD2 of the present embodiment. If the side wall portion M117 of the housing M10 is configured to have inlet ports and outlet ports corresponding to each of the flow holes, the size of each port is limited. Therefore, the configuration of the second multi-way valve MV2 may cause a larger pressure loss when the cooling water flows through each inlet port and outlet port than the configuration having the second fixed disk FD2 of the present embodiment.

[0226] Furthermore, in the six operation modes of the temperature control device, the second multi-way valve MV2 and the third multi-way valve MV3 are configured to be closed, so that the sizes and positions of the 2-2 circulation holes FD22, the 2-3 circulation holes FD23, the 2-4 circulation holes FD24, the 2-5 circulation holes FD25, and the 2-6 circulation holes FD26 are limited. Therefore, as in the example shown in the 1-3 mode, the overlapping ranges of the 2-3 circulation holes FD23 that communicate with the second through hole MD21 may be small. If cooling water is flowed through such a small communication area, the pressure loss that occurs when the cooling water flows is likely to be large.

[0227] Such an increase in pressure loss leads to an increase in pressure loss in the entire fluid circuit system 1, which is undesirable.

[0228] Further, the 2-2 through hole FD22, the 2-4 through hole FD24, and the 2-6 through hole FD26, each of which is formed in pairs in the comparative second movable disc CMD2, communicate with each other inside the housing M10 by a communication mechanism (not shown). In this case, there is a risk that the structure inside the housing M10 will be more complicated than in the second multi-way valve MV2 of this embodiment.

[0229] Such a complication of the second multi-way valve MV2 increases the manufacturing cost of the second multi-way valve MV2, which in turn increases the manufacturing cost of the entire fluid circuit system 1, and is therefore undesirable.

[0230] Furthermore, if the number of operation modes of the temperature adjustment device is increased to more than six, the number of communication holes required for the comparative second movable disk CMD2 may increase. However, if it is not possible to increase the number of communication holes or if ports corresponding to each communication hole cannot be provided in the side wall portion M117, it is necessary to add further valve devices to the fluid circuit system 1. However, increasing the number of valve devices is undesirable because it increases the manufacturing cost of the entire fluid circuit system 1.

[0231] In this way, when the temperature adjustment device executes the six operating modes, various problems arise when the fluid circuit system 1 is configured to block the unneeded inlet and outlet of each of the first multi-way valve MV1 to the third multi-way valve MV3.

[0232] In contrast, the fluid circuit system 1 of this embodiment is not necessarily configured to close the unneeded inlet and outlet of each of the first multi-way valve MV1, the second multi-way valve MV2, and the third multi-way valve MV3. That is, the fluid circuit system 1 of this embodiment is configured so that the unneeded inlet and outlet of each of the first multi-way valve MV1, the second multi-way valve MV2, and the third multi-way valve MV3 may be in either an open state or a closed state.

[0233] In the fluid circuit system 1, the first multi-way valve MV1 to the third multi-way valve MV3 are configured to prevent cooling water from flowing to connected devices that do not require the flow of cooling water in each of the six operation modes. Specifically, in the fluid circuit system 1 of this embodiment, the second movable disc MD2 of the second multi-way valve MV2 has a different configuration from the comparative second movable disc CMD2, and the second fixed disc FD2 has a different configuration from the comparative second fixed disc CFD2. In the fluid circuit system 1, the third fixed disc FD3 of the third multi-way valve MV3 has a different configuration from the comparative third fixed disc CFD3.

[0234] A fluid circuit system 1 including the first multi-way valve MV1, second multi-way valve MV2, and third multi-way valve MV3, each having a different configuration, will be described with reference to Figures 30 to 41. Note that since the configuration of the first multi-way valve MV1 is the same as that of the comparative example described above, a detailed description of the operation of the first multi-way valve MV1 in each operation mode will be omitted.

[0235] First, the 1-1 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-1 mode, the first movable disk MD1 is positioned at the rotational position shown in Fig. 30. As a result, the 1-1 opening P11 and the 1-2 opening P12 are closed. In addition, the 1-4 opening P14 communicates with the 1-3 opening P13 via the 1-4 circulation hole FD14, the first communication hole MD12, and the 1-3 circulation hole FD13.

[0236] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-1 mode, the second movable disc MD2 is positioned so that the second through hole MD21 communicates with the 2-3 circulation hole FD23 and the 2-5 circulation hole FD25. Moreover, the second movable disc MD2 is positioned so that the second communication hole MD22 communicates with the 2-2 circulation hole FD22, the 2-4 circulation hole FD24, and the 2-6 circulation hole FD26.

[0237] As a result, the 2-1 opening P21 communicates with the 2-3 opening P23 via the second through hole MD21 and the 2-3 communication hole FD23, and also communicates with the 2-5 opening P25 via the second through hole MD21 and the 2-5 communication hole FD25. The 2-6 opening P26 communicates with the 2-2 opening P22 via the second communication hole MD22 and the 2-2 communication hole FD22, and also communicates with the 2-4 opening P24 via the second communication hole MD22 and the 2-4 communication hole FD24.

[0238] When the operation mode of the temperature adjustment device is set to the 1-1 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-2 communication hole FD32. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-3 communication hole FD33 and the 3-5 communication hole FD35. However, the 3-4 communication hole FD34 does not face either the third through hole MD31 or the third communication hole MD32.

[0239] As a result, the 3-1 opening P31 communicates with the 3-2 opening P32 via the third through hole MD31 and the 3-2 communication hole FD32. The 3-3 opening P33 communicates with the 3-5 opening P35 via the third communication hole MD32 and the 3-5 communication hole FD35. The 3-4 communication hole FD34 does not communicate with either the third through hole MD31 or the third communication hole MD32, and is blocked by the third movable disc MD3. Therefore, the 3-4 opening P34 is blocked.

[0240] With reference to Figure 31, the flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and cooling water outlet of each of the first multi-way valve MV1, the second multi-way valve MV2 and the third multi-way valve MV3 are set in this manner will be explained.

[0241] As described above, in the 1-1 mode, the fluid circuit system 1 communicates the 1-4 opening P14 of the first multi-way valve MV1 with the 1-3 opening P13, and the 2-6 opening P26 of the second multi-way valve MV2 with the 2-4 opening P24. The fluid circuit system 1 also communicates the 3-1 opening P31 of the third multi-way valve MV3 with the 3-2 opening P32. This allows the fluid circuit system 1 to circulate the cooling water through the CV1-P26 flow path FC9, the P24-P14 flow path FC4, and the P13-CV1 flow path FC3 by operating the first pump P1. The fluid circuit system 1 can then guide the cooling water to the chiller CH and the driving heat generating unit PT.

[0242] Furthermore, the fluid circuit system 1 can circulate the cooling water through the P32-CV3 flow path FC11 and the CV3-P31 flow path FC10 by operating the third pump P3. The fluid circuit system 1 can guide the cooling water to the water-cooled condenser WC and the heater core HC.

[0243] However, in the fluid circuit system 1 of the present embodiment, the 2-6 opening P26 of the second multi-way valve MV2 is connected to the 2-2 opening P22 which is an unneeded outlet, and the 3-3 opening P33 which is an unneeded inlet of the third multi-way valve MV3 is connected to the 3-5 opening P35 which is an unneeded outlet. In this case, the cooling water pumped by the first pump P1 flows through the P22-P33 flow path FC6 and the P35-P11 flow path FC1, and may flow into the battery BT which does not require the flow of cooling water.

[0244] In contrast, in the fluid circuit system 1 of the present embodiment, in the 1-1 mode, the 1-1 opening P11 of the first multi-way valve MV1 connected to the refrigerant flow downstream side of the P35-P11 flow path FC1 in which the battery BT is arranged is blocked by the first movable disk MD1. This makes it possible to prevent the cooling water pumped by the first pump P1 from flowing through the P22-P33 flow path FC6 and the P35-P11 flow path FC1 to the battery BT. That is, the fluid circuit system 1 can prohibit the flow of cooling water that may pass through the unnecessary inlet and unnecessary outlet that are in the open state of the second multi-way valve MV2 and the third multi-way valve MV3 by the first multi-way valve MV1 that is different from the second multi-way valve MV2 and the third multi-way valve MV3.

[0245] In the fluid circuit system 1 of this embodiment, the 2-1 opening P21 of the second multi-way valve MV2, which is an unnecessary inlet, is connected to the 2-3 opening P23 and the 2-5 opening P25, which are unnecessary outlets. However, the circuit formed by the P32-CV3 flow path FC11 and the CV3-P31 flow path FC10 to which the 2-3 opening P23 is connected is a closed circuit. Therefore, the cooling water does not flow from the 2-3 opening P23 to the P23-CV3 flow path FC7, and the cooling water does not flow from the P23-CV3 flow path FC7 to the 2-3 opening P23.

[0246] In addition, the circuit formed by the CV1-P26 flow path FC9, the P24-P14 flow path FC4, and the P13-CV1 flow path FC3 to which the 2-5 opening P25 is connected is a closed circuit, so that the cooling water does not flow from the 2-5 opening P25 to the P25-CV1 flow path FC8, and the cooling water does not flow from the P25-CV1 flow path FC8 to the 2-5 opening P25.

[0247] In FIG. 31 and other figures, flow paths that are communicated by opening and closing the waste inflow inlets and waste outflow outlets of the second multi-way valve MV2 and the third multi-way valve MV3 are shown by dashed lines.

[0248] Next, the 1-2 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-2 mode, the first movable disk MD1 is positioned at the rotational position shown in Fig. 32. As a result, the 1-1 opening P11 communicates with the 1-3 opening P13 via the first through hole MD11 and the 1-3 flow hole FD13. In addition, the 1-2 opening P12 and the 1-4 opening P14 are closed.

[0249] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-2 mode, the second movable disc MD2 is positioned so that the second through hole MD21 communicates with the 2-3 circulation hole FD23 and the 2-5 circulation hole FD25. Moreover, the second movable disc MD2 is positioned so that the second communication hole MD22 communicates with the 2-2 circulation hole FD22, the 2-4 circulation hole FD24, and the 2-6 circulation hole FD26.

[0250] As a result, the 2-1 opening P21 communicates with the 2-3 opening P23 via the second through hole MD21 and the 2-3 communication hole FD23, and also communicates with the 2-5 opening P25 via the second through hole MD21 and the 2-5 communication hole FD25. The 2-6 opening P26 communicates with the 2-2 opening P22 via the second communication hole MD22 and the 2-2 communication hole FD22, and also communicates with the 2-4 opening P24 via the second communication hole MD22 and the 2-4 communication hole FD24.

[0251] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-2 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-2 communication hole FD32. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-3 communication hole FD33 and the 3-4 communication hole FD34. However, the 3-5 communication hole FD35 does not face either the third through hole MD31 or the third communication hole MD32.

[0252] As a result, the 3-1 opening P31 communicates with the 3-2 opening P32 via the third through hole MD31 and the 3-2 communication hole FD32. The 3-3 opening P33 communicates with the 3-4 opening P34 via the third communication hole MD32 and the 3-4 communication hole FD34. The 3-5 communication hole FD35 does not communicate with either the third through hole MD31 or the third communication hole MD32, and is blocked by the third movable disc MD3. Therefore, the 3-5 opening P35 is blocked.

[0253] With reference to Figure 33, the flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and cooling water outlet of each of the first multi-way valve MV1, the second multi-way valve MV2 and the third multi-way valve MV3 are set in this manner will be explained.

[0254] As described above, in the 1-2 mode, the fluid circuit system 1 communicates the 2-1 opening P21 of the second multi-way valve MV2 with the 2-5 opening P25, and the 2-6 opening P26 with the 2-2 opening P22. Also, the fluid circuit system 1 communicates the 3-3 opening P33 of the third multi-way valve MV3 with the 3-4 opening P34. This allows the fluid circuit system 1 to circulate the cooling water through the P25-CV1 flow path FC8, the CV1-P26 flow path FC9, the P22-P33 flow path FC6, the P34-CV2 flow path FC12, and the CV2-P21 flow path FC5 by operating the first pump P1 and the second pump P2. Then, the fluid circuit system 1 can guide the cooling water to the radiator LT and the chiller CH.

[0255] Furthermore, the fluid circuit system 1 can circulate the cooling water through the P32-CV3 flow path FC11 and the CV3-P31 flow path FC10 by operating the third pump P3. The fluid circuit system 1 can guide the cooling water to the water-cooled condenser WC and the heater core HC.

[0256] However, in the fluid circuit system 1 of this embodiment, the 2-6 opening P26 of the second multi-way valve MV2 is connected to the 2-4 opening P24, which is an unnecessary outlet. In this case, the cooling water pumped by the first pump P1 flows through the P24-P14 flow path FC4, and there is a risk that it will flow into the driving heat generating part PT, which does not require the flow of cooling water.

[0257] In contrast, in the fluid circuit system 1 of this embodiment, in the 1-2 mode, the 1-4 opening P14 of the first multi-way valve MV1 connected to the refrigerant flow downstream side of the P24-P14 flow path FC4 in which the driving heat generating part PT is arranged is blocked by the first movable disk MD1. This makes it possible to prevent the cooling water pumped by the first pump P1 from flowing through the P24-P14 flow path FC4 to the driving heat generating part PT. In other words, the fluid circuit system 1 can use the first multi-way valve MV1, which is different from the second multi-way valve MV2, to prohibit the flow of cooling water that may pass through the unnecessary outlet port that is in an open state in the second multi-way valve MV2.

[0258] Next, the 1-3 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-3 mode, the first movable disk MD1 is positioned at the rotational position shown in Fig. 34. As a result, the 1-1 opening P11 communicates with the 1-3 opening P13 via the first through hole MD11 and the 1-3 flow hole FD13. In addition, the 1-2 opening P12 and the 1-4 opening P14 are closed.

[0259] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-3 mode, the second movable disc MD2 is positioned so that the second through hole MD21 communicates with the 2-3 circulation hole FD23 and the 2-4 circulation hole FD24. Moreover, the second movable disc MD2 is positioned so that the second communication hole MD22 communicates with the 2-2 circulation hole FD22 and the 2-6 circulation hole FD26.

[0260] As a result, the 2-1 opening P21 communicates with the 2-3 opening P23 via the second through hole MD21 and the 2-3 communication hole FD23, and communicates with the 2-4 opening P24 via the second through hole MD21 and the 2-4 communication hole FD24. The 2-6 opening P26 communicates with the 2-2 opening P22 via the second communication hole MD22 and the 2-2 communication hole FD22.

[0261] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-3 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-4 communication hole FD34. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-3 communication hole FD33 and the 3-5 communication hole FD35. However, the 3-2 communication hole FD32 does not face either the third through hole MD31 or the third communication hole MD32.

[0262] As a result, the 3-1 opening P31 communicates with the 3-4 opening P34 via the third through hole MD31 and the 3-4 communication hole FD34. The 3-3 opening P33 communicates with the 3-5 opening P35 via the third communication hole MD32 and the 3-5 communication hole FD35. The 3-2 communication hole FD32 does not communicate with either the third through hole MD31 or the third communication hole MD32, and is blocked by the third movable disc MD3. Therefore, the 3-2 opening P32 is blocked.

[0263] With reference to Figure 35, the flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and cooling water outlet of each of the first multi-way valve MV1, the second multi-way valve MV2 and the third multi-way valve MV3 are set in this manner will be explained.

[0264] As described above, in the 1-3 mode, the 2-1 opening P21 of the second multi-way valve MV2 is connected to the 2-3 opening P23, and the 3-1 opening P31 of the third multi-way valve MV3 is connected to the 3-4 opening P34. This allows the fluid circuit system 1 to circulate the cooling water through the CV2-P21 flow path FC5, the P23-CV3 flow path FC7, the CV3-P31 flow path FC10, and the P34-CV2 flow path FC12 by operating the second pump P2 and the third pump P3. The fluid circuit system 1 can then guide the cooling water to the radiator LT and the water-cooled condenser WC.

[0265] However, in the fluid circuit system 1 of the present embodiment, the 2-1 opening P21 of the second multi-way valve MV2 is connected to the 2-4 opening P24, which is an unneeded outlet, and the 2-6 opening P26, which is an unneeded inlet, is connected to the 2-2 opening P22, which is an unneeded outlet. In addition, the fluid circuit system 1 connects the 3-3 opening P33, which is an unneeded inlet of the third multi-way valve MV3, to the 3-5 opening P35, which is an unneeded outlet. In this case, the cooling water pumped by the second pump P2 flows through the P24-P14 flow path FC4, and may flow into the driving heat generating part PT, which does not need to be cooled. In addition, the cooling water pumped by the first pump P1 flows through the P22-P33 flow path FC6 and the P35-P11 flow path FC1, and may flow into the battery BT, which does not need to be cooled.

[0266] In contrast, in the fluid circuit system 1 of this embodiment, in the 1-3 mode, the 1-4 opening P14 of the first multi-way valve MV1 connected to the refrigerant flow downstream side of the P24-P14 flow path FC4 in which the driving heat generating part PT is arranged is blocked by the first movable disk MD1. This makes it possible to prevent the cooling water pumped by the second pump P2 from flowing through the P24-P14 flow path FC4 to the driving heat generating part PT. In other words, the fluid circuit system 1 can use the first multi-way valve MV1, which is different from the second multi-way valve MV2, to prohibit the flow of cooling water that may pass through the unnecessary outlet port that is in an open state in the second multi-way valve MV2.

[0267] In addition, the fluid circuit system 1 of this embodiment does not operate the first pump P1 in the 1-3 mode. Therefore, the 2-6 opening P26 of the second multi-way valve MV2 communicates with the 2-2 opening P22, and the 3-3 opening P33 of the third multi-way valve MV3 communicates with the 3-5 opening P35, so that the circuit including the P35-P11 flow path FC1 in which the battery BT is arranged can circulate the cooling water. Even in this case, the cooling water does not flow to the battery BT. That is, the fluid circuit system 1 can open the unnecessary inlet and the unnecessary outlet that communicate the circuit in which the first pump P1, which does not operate in the 1-3 mode, is arranged.

[0268] Next, the 1-4 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-4 mode, the first movable disk MD1 is positioned at the rotational position shown in Fig. 36. As a result, the 1-1 opening P11 communicates with the 1-3 opening P13 via the first through hole MD11 and the 1-3 flow hole FD13. In addition, the 1-4 opening P14 communicates with the 1-2 opening P12 via the 1-4 flow hole FD14, the first communication hole MD12, and the 1-2 flow hole FD12.

[0269] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-4 mode, the second movable disc MD2 is positioned so that the second through hole MD21 communicates with the 2-3 circulation hole FD23 and the 2-4 circulation hole FD24. Moreover, the second movable disc MD2 is positioned so that the second communication hole MD22 communicates with the 2-2 circulation hole FD22 and the 2-6 circulation hole FD26.

[0270] As a result, the 2-1 opening P21 communicates with the 2-3 opening P23 via the second through hole MD21 and the 2-3 communication hole FD23, and communicates with the 2-4 opening P24 via the second through hole MD21 and the 2-4 communication hole FD24. The 2-6 opening P26 communicates with the 2-2 opening P22 via the second communication hole MD22 and the 2-2 communication hole FD22.

[0271] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-4 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-4 communication hole FD34. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-3 communication hole FD33 and the 3-5 communication hole FD35. However, the 3-2 communication hole FD32 does not face either the third through hole MD31 or the third communication hole MD32.

[0272] As a result, the 3-1 opening P31 communicates with the 3-4 opening P34 via the third through hole MD31 and the 3-4 communication hole FD34. The 3-3 opening P33 communicates with the 3-5 opening P35 via the third communication hole MD32 and the 3-5 communication hole FD35. The 3-2 communication hole FD32 does not communicate with either the third through hole MD31 or the third communication hole MD32, and is blocked by the third movable disc MD3. Therefore, the 3-2 opening P32 is blocked.

[0273] With reference to Figure 37, the flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and cooling water outlet of each of the first multi-way valve MV1, the second multi-way valve MV2 and the third multi-way valve MV3 are set in this manner will be explained.

[0274] As described above, in the 1-4 mode, the fluid circuit system 1 communicates the 1-4 opening P14 of the first multi-way valve MV1 with the 1-2 opening P12, and communicates the 2-1 opening P21 of the second multi-way valve MV2 with the 2-3 opening P23 and the 2-4 opening P24. In addition, the fluid circuit system 1 communicates the 3-1 opening P31 of the third multi-way valve MV3 with the 3-4 opening P34.

[0275] Thus, the fluid circuit system 1 can circulate the cooling water through the P12-CV2 flow path FC2, the CV2-P21 flow path FC5, the P24-P14 flow path FC4, the P23-CV3 flow path FC7, the CV3-P31 flow path FC10, and the P34-CV2 flow path FC12 by operating the second pump P2 and the third pump P3. The fluid circuit system 1 can then guide the cooling water to the water-cooled condenser WC, the radiator LT, and the driving heat generating part PT.

[0276] However, in the fluid circuit system 1 of this embodiment, the 2-6 opening P26, which is an unneeded inlet, is connected to the 2-2 opening P22, which is an unneeded outlet. Also, the fluid circuit system 1 connects the 3-3 opening P33, which is an unneeded inlet of the third multi-way valve MV3, to the 3-5 opening P35, which is an unneeded outlet. In this case, the cooling water pumped by the first pump P1 flows through the P22-P33 flow path FC6 and the P35-P11 flow path FC1, and may flow into the battery BT, which does not require the flow of cooling water.

[0277] On the other hand, in the 1-4 mode, the fluid circuit system 1 does not operate the first pump P1, as in the 1-3 mode. Therefore, the 2-6 opening P26 of the second multi-way valve MV2 communicates with the 2-2 opening P22, and the 3-3 opening P33 of the third multi-way valve MV3 communicates with the 3-5 opening P35, so that the circuit including the P35-P11 flow path FC1 in which the battery BT is arranged can circulate the cooling water. Even in this case, the cooling water does not flow to the battery BT. That is, the fluid circuit system 1 can open the unnecessary inlet and the unnecessary outlet that communicate the circuit in which the first pump P1, which does not operate in the 1-4 mode, is arranged.

[0278] Next, the 1-5 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-5 mode, the first movable disk MD1 is positioned at the rotational position shown in FIG. 38. As a result, the 1-1 opening P11 communicates with the 1-2 opening P12 via the first through hole MD11 and the 1-2 flow hole FD12. In addition, the 1-4 opening P14 also communicates with the 1-2 opening P12 via the first through hole MD11 and the 1-2 flow hole FD12. In addition, the 1-3 opening P13 is closed.

[0279] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-5 mode, the second movable disc MD2 is positioned so that the second through hole MD21 communicates with the 2-2 circulation hole FD22, the 2-3 circulation hole FD23, and the 2-4 circulation hole FD24. Moreover, the second movable disc MD2 is positioned so that the second communication hole MD22 communicates with the 2-5 circulation hole FD25 and the 2-6 circulation hole FD26.

[0280] As a result, the 2-1 opening P21 communicates with the 2-2 opening P22 via the second through hole MD21 and the 2-2 communication hole FD22, communicates with the 2-3 opening P23 via the second through hole MD21 and the 2-3 communication hole FD23, and communicates with the 2-4 opening P24 via the second through hole MD21 and the 2-4 communication hole FD24. The 2-6 opening P26 communicates with the 2-5 opening P25 via the second communication hole MD22 and the 2-5 communication hole FD25.

[0281] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-5 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-4 communication hole FD34. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-3 communication hole FD33 and the 3-5 communication hole FD35. However, the 3-2 communication hole FD32 does not face either the third through hole MD31 or the third communication hole MD32.

[0282] As a result, the 3-1 opening P31 communicates with the 3-4 opening P34 via the third through hole MD31 and the 3-4 communication hole FD34. The 3-3 opening P33 communicates with the 3-5 opening P35 via the third communication hole MD32 and the 3-5 communication hole FD35. The 3-2 communication hole FD32 does not communicate with either the third through hole MD31 or the third communication hole MD32, and is blocked by the third movable disc MD3. Therefore, the 3-2 opening P32 is blocked.

[0283] With reference to Figure 39, the flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and cooling water outlet of each of the first multi-way valve MV1, the second multi-way valve MV2 and the third multi-way valve MV3 are set in this manner will be explained.

[0284] As described above, in the 1-5 mode, the fluid circuit system 1 communicates the 1-1 opening P11 and the 1-4 opening P14 of the first multi-way valve MV1 with the 1-2 opening P12, and communicates the 2-1 opening P21 of the second multi-way valve MV2 with the 2-3 opening P23. In addition, the fluid circuit system 1 communicates the 3-1 opening P31 of the third multi-way valve MV3 with the 3-4 opening P34, and communicates the 3-3 opening P33 with the 3-5 opening P35.

[0285] Thus, the fluid circuit system 1 can circulate the cooling water through the P12-CV2 flow path FC2, the CV2-P21 flow path FC5, the P24-P14 flow path FC4, the P23-CV3 flow path FC7, the CV3-P31 flow path FC10, the P34-CV2 flow path FC12, the P22-P33 flow path FC6, and the P35-P11 flow path FC1 by operating the second pump P2 and the third pump P3. The fluid circuit system 1 can then guide the cooling water to the water-cooled condenser WC, the radiator LT, the driving heat generating part PT, and the battery BT.

[0286] However, in the fluid circuit system 1 of the present embodiment, the 2-6 opening P26, which is an unneeded inlet, is connected to the 2-5 opening P25, which is an unneeded outlet. In this case, the cooling water pumped by the first pump P1 flows through the CV1-P26 flow path FC9 and the P25-CV1 flow path FC8, and may flow into the chiller CH, which does not need to pass cooling water.

[0287] In contrast, the fluid circuit system 1 of this embodiment does not operate the first pump P1 in the 1-5 mode. Therefore, by connecting the 2-6 opening P26 of the second multi-way valve MV2 to the 2-5 opening P25, even if the circuit including the CV1-P26 flow path FC9 in which the chiller CH is arranged can circulate the coolant, the coolant does not flow into the chiller CH. In other words, the fluid circuit system 1 can open the unnecessary inlet and the unnecessary outlet that communicate the circuit in which the first pump P1, which does not operate in the 1-5 mode, is arranged.

[0288] Next, the 1-6 mode will be described. When the operation mode of the temperature adjustment device is set to the 1-6 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 40. As a result, the 1-1 opening P11 communicates with the 1-3 opening P13 via the first through hole MD11 and the 1-3 flow hole FD13. In addition, the 1-4 opening P14 communicates with the 1-2 opening P12 via the 1-4 flow hole FD14, the first communication hole MD12, and the 1-2 flow hole FD12.

[0289] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-6 mode, the second movable disc MD2 is positioned so that the second through hole MD21 communicates with the 2-3 flow hole FD23 and the 2-4 flow hole FD24. Moreover, the second movable disc MD2 is positioned so that the second communication hole MD22 communicates with the 2-2 flow hole FD22 and the 2-6 flow hole FD26.

[0290] As a result, the 2-1 opening P21 communicates with the 2-3 opening P23 via the second through hole MD21 and the 2-3 communication hole FD23, and communicates with the 2-4 opening P24 via the second through hole MD21 and the 2-4 communication hole FD24. The 2-6 opening P26 communicates with the 2-2 opening P22 via the second communication hole MD22 and the 2-2 communication hole FD22.

[0291] Furthermore, when the operation mode of the temperature adjustment device is set to the 1-6 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-4 communication hole FD34. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-3 communication hole FD33 and the 3-5 communication hole FD35. However, the 3-2 communication hole FD32 does not face either the third through hole MD31 or the third communication hole MD32.

[0292] As a result, the 3-1 opening P31 communicates with the 3-4 opening P34 via the third through hole MD31 and the 3-4 communication hole FD34. The 3-3 opening P33 communicates with the 3-5 opening P35 via the third communication hole MD32 and the 3-5 communication hole FD35. The 3-2 communication hole FD32 does not communicate with either the third through hole MD31 or the third communication hole MD32, and is blocked by the third movable disc MD3. Therefore, the 3-2 opening P32 is blocked.

[0293] With reference to Figure 41, the flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and cooling water outlet of each of the first multi-way valve MV1, the second multi-way valve MV2 and the third multi-way valve MV3 are set in this manner will be explained.

[0294] As described above, in the 1-6 mode, the fluid circuit system 1 communicates the 1-1 opening P11 of the first multi-way valve MV1 with the 1-3 opening P13, and the 1-4 opening P14 with the 1-2 opening P12. The fluid circuit system 1 also communicates the 2-1 opening P21 of the second multi-way valve MV2 with the 2-2 opening P22, the 2-3 opening P23, and the 2-4 opening P24, and communicates the 2-6 opening P26 with the 2-3 opening P23. The fluid circuit system 1 also communicates the 3-1 opening P31 of the third multi-way valve MV3 with the 3-4 opening P34, and communicates the 3-3 opening P33 with the 3-5 opening P35.

[0295] As a result, the fluid circuit system 1 can circulate the cooling water to the P22-P33 flow path FC6, the P35-P11 flow path FC1, the P13-CV1 flow path FC3, and the CV1-P26 flow path FC9 by operating the first pump P1. The fluid circuit system 1 can guide the cooling water to the chiller CH and the battery BT. The fluid circuit system 1 can also circulate the cooling water to the P12-CV2 flow path FC2, the CV2-P21 flow path FC5, the P24-P14 flow path FC4, the P23-CV3 flow path FC7, the CV3-P31 flow path FC10, and the P34-CV2 flow path FC12 by operating the second pump P2 and the third pump P3. The fluid circuit system 1 can guide the cooling water to the water-cooled condenser WC, the radiator LT, and the driving heat generating part PT.

[0296] As described above, the fluid circuit system 1 of this embodiment prohibits the flow of fluid into the undesired inlet and outlet of the second multi-way valve MV2 that are in an open state by blocking the undesired inlet and outlet of the third multi-way valve MV3, which is different from the second multi-way valve MV2.

[0297] This results in fewer restrictions on the first to third multi-way valves MV1 to MV3 compared to when the fluid circuit system 1 is configured to block the unwanted inlet and outlet of each of the first to third multi-way valves MV1 to MV3 when the temperature adjustment device executes the six operating modes.

[0298] For example, if the first to third multi-way valves MV1 to MV3 are configured to be closed, it is necessary to close the unnecessary inlet and the unnecessary outlet of each of the first to third multi-way valves MV1 to MV3 in all six operation modes. In this case, the size and position of the flow holes formed in each of the first to third fixed disks FD1 to FD3 provided in the first to third multi-way valves MV1 to MV3, which are disk valves, are likely to be limited.

[0299] If the size of the through holes formed in each of the first fixed disk FD1, the second fixed disk FD2, and the third fixed disk FD3 is restricted, the pressure loss when the fluid flows through these through holes is likely to increase. That is, the pressure loss when the fluid flows through each of the first multi-way valve MV1 to the third multi-way valve MV3 increases. This causes an increase in the power consumption of the first pump P1, the second pump P2, and the third pump P3 that generate the flow of the fluid in the fluid circuit FC.

[0300] However, by configuring the first to third multi-way valves MV1 to MV3 so that the unneeded inlets and unneeded outlets can be either open or closed, it is easy to increase the size of the communication holes formed in each of the first to third fixed disks FD1 to FD3. In addition, by increasing the size of the communication holes, it is possible to reduce pressure loss when the fluid flows through the communication holes.

[0301] In addition, since the size and position of the through holes formed in each of the first fixed disk FD1 to the third fixed disk FD3 are not easily restricted, there is no need to form two 2-2 through holes FD22, etc., as in the above-mentioned comparative second fixed disk CFD2, and therefore the number of through holes formed in the second fixed disk FD2 can be reduced.

[0302] This simplifies the structure of the second fixed disk FD2. Also, since there is no need to provide a communication mechanism for communicating the two 2-2 flow holes FD22 inside the housing M10, the structure inside the housing M10 can be simplified. This makes it possible to suppress pressure loss when fluid flows inside the second multi-way valve MV2. This makes it possible to suppress the manufacturing costs of the second multi-way valve MV2.

[0303] Furthermore, in a configuration in which the side wall portion M117 of the housing M10 is provided with an inlet port and an outlet port corresponding to each of the flow holes, the size of each port is not limited compared to a configuration in which the second fixed disk FD2 is included. Specifically, the second multi-way valve MV2 of this embodiment can have larger inlet and outlet ports than the configuration in which the second fixed disk CFD2 is included. This makes it possible to suppress pressure loss that occurs when fluid flows through the inlet and outlet ports.

[0304] In addition, the size and position of the flow holes formed in each of the first fixed disk FD1 to the third fixed disk FD3 are not easily restricted. Therefore, it is easy to ensure the communication range when communicating with each of the first through hole MD11, the first communication hole MD12, the second through hole MD21, the second communication hole MD22, the third through hole MD31, and the third communication hole MD32. Therefore, it is possible to suppress pressure loss when the fluid flows through these first through hole MD11, the first communication hole MD12, the second through hole MD21, the second communication hole MD22, the third through hole MD31, and the third communication hole MD32.

[0305] Therefore, pressure loss when fluid flows through each of the first multi-way valve MV1 to the third multi-way valve MV3 can be suppressed. This makes it possible to reduce the power consumption of the first pump P1, the second pump P2, and the third pump P3 that generate the flow of fluid in the fluid circuit FC. As a result, the running costs of the entire fluid circuit system 1 can be reduced.

[0306] Furthermore, by suppressing the pressure loss when the fluid flows through each of the first multi-way valve MV1 to the third multi-way valve MV3, the capacity of the first pump P1, the second pump P2, and the third pump P3 can be reduced, which makes it possible to reduce the initial cost of the entire fluid circuit system 1.

[0307] In addition, since the size and position of the flow holes formed in each of the first fixed disk FD1 to the third fixed disk FD3 are not easily restricted, even if the number of operation modes of the temperature adjustment device is increased to more than six, it is easy to form flow holes corresponding to the increased operation modes. Therefore, it is not necessary to add an additional valve device because it is not possible to form flow holes. Therefore, even if the number of operation modes of the temperature adjustment device is increased to more than six, it is possible to suppress an increase in the manufacturing cost of the entire fluid circuit system 1.

[0308] (Modification of the first embodiment) In the first embodiment, an example has been described in which the flow of fluid to the open unneeded inlet and unneeded outlet of the second multi-way valve MV2 is prohibited by closing the unneeded inlet and unneeded outlet of the third multi-way valve MV3 different from the second multi-way valve MV2, but the present invention is not limited to this. For example, the fluid circuit system 1 may be configured to prohibit the flow of fluid to the open unneeded inlet and unneeded outlet of the first multi-way valve MV1 by closing the unneeded inlet and unneeded outlet of the second multi-way valve MV2 or the third multi-way valve MV3. The fluid circuit system 1 may also be configured to prohibit the flow of fluid to the open unneeded inlet and unneeded outlet of the third multi-way valve MV3 by closing the unneeded inlet and unneeded outlet of the first multi-way valve MV1 or the second multi-way valve MV2.

[0309] Second embodiment Next, the second embodiment will be described with reference to Figs. 42 to 64. This embodiment differs from the first embodiment in that an electric heater EH is added as a device connected to the temperature adjustment device. This embodiment also differs from the first embodiment in that a fourth pump P4, a fourth multi-way valve MV4, and a fifth multi-way valve MV5 are added to the fluid circuit system 1, and a part of the fluid circuit FC is changed with the addition of the electric heater EH, the fourth multi-way valve MV4, and the fifth multi-way valve MV5. The rest is the same as the first embodiment. Therefore, in this embodiment, the parts different from the first embodiment will be mainly described, and the description of the parts similar to the first embodiment may be omitted.

[0310] As shown in Fig. 42, an electric heater EH is connected to the temperature adjustment device of this embodiment. The electric heater EH is for heating the coolant to be introduced into the heater core HC when the vehicle air conditioner performs heating. The electric heater EH is provided upstream of the heater core HC in the coolant flow. The fluid circuit system 1 is also provided with a first multi-way valve MV1, a second multi-way valve MV2, a third multi-way valve MV3, as well as a fourth multi-way valve MV4 and a fifth multi-way valve MV5 for switching the flow of the coolant to various connected devices of the temperature adjustment device including the electric heater EH.

[0311] Although the first multi-way valve MV1 to the third multi-way valve MV3 have the same basic configuration, some of the configurations of the cooling water inlet and the cooling water outlet are different from those of the first embodiment. Specifically, the first multi-way valve MV1 has a different combination of the cooling water inlet and the cooling water outlet of the 1-1 opening P11, the 1-2 opening P12, the 1-3 opening P13, and the 1-4 opening P14. The second multi-way valve MV2 has a different combination of the cooling water inlet and the cooling water outlet of the 2-3 opening P23, the 2-4 opening P24, the 2-5 opening P25, and the 2-6 opening P26. And the third multi-way valve MV3 has a different combination of the cooling water inlet and the cooling water outlet of the 3-3 opening P33 and the 3-5 opening P35.

[0312] The fourth multi-way valve MV4 and the fifth multi-way valve MV5 are disk valves having the same basic configuration as the first multi-way valve MV1 to the third multi-way valve MV3. The fourth multi-way valve MV4 and the fifth multi-way valve MV5 have multiple cooling water inlets and multiple cooling water outlets, and switch the fluid circuit FC according to each operation mode by causing the cooling water that flows into them to flow out from the cooling water outlet that corresponds to each operation mode of the temperature adjustment device.

[0313] The first multi-way valve MV1 has two cooling water inlets and two cooling water outlets, as shown in Fig. 42. In this embodiment, the two cooling water inlets formed in the first multi-way valve MV1 are called a 1-2 opening P12 and a 1-3 opening P13, and the two cooling water outlets formed in the first multi-way valve MV1 are called a 1-1 opening P11 and a 1-4 opening P14.

[0314] The first multi-way valve MV1 has a first fixed disc FD1 (described below) that has a 1-1 flow hole FD11 that can communicate with the 1-1 opening P11, a 1-3 flow hole FD13 that can communicate with the 1-3 opening P13, and a 1-4 flow hole FD14 that can communicate with the 1-4 opening P14. The first multi-way valve MV1 also has a first movable disc MD1 (described below) that rotates in sliding contact with the first fixed disc FD1 and has a first through hole MD11 and a first communication hole MD12 that communicate with the 1-1 flow hole FD11, the 1-3 flow hole FD13, and the 1-4 flow hole FD14.

[0315] The first multi-way valve MV1 is disposed in the upward direction DRa2 from the first movable disk MD1 and the first fixed disk FD1, and a 1-2 opening P12 is formed in a port (not shown) that introduces cooling water into the first multi-way valve MV1. As shown in Fig. 43, the first multi-way valve MV1 of this embodiment can switch the destination of the cooling water flowing in from the 1-2 opening P12 and the 1-3 opening P13 to the 1-1 opening P11 and the 1-4 opening P14 depending on the operation mode of the temperature adjustment device.

[0316] Specifically, the first multi-way valve MV1 is operable in such a manner that the 1-3 opening P13 communicates with the 1-4 opening P14, the 1-3 opening P13 communicates with the 1-1 opening P11, the 1-3 opening P13 communicates with the 1-1 opening P11 and the 1-4 opening P14, the 1-2 opening P12 communicates with the 1-4 opening P14, the 1-2 opening P12 communicates with the 1-1 opening P11, and the 1-2 opening P The operation can be switched to any one of eight operations: an operation in which the 1-1 opening P11 and the 1-4 opening P14 are connected to each other; an operation in which the 1-3 opening P13 is connected to the 1-1 opening P11 and the 1-2 opening P12 is connected to the 1-4 opening P14; and an operation in which the 1-3 opening P13 is connected to the 1-4 opening P14 and the 1-2 opening P12 is connected to the 1-1 opening P11.

[0317] The second multi-way valve MV2 has four cooling water inlets and two cooling water outlets, as shown in Fig. 42. In this embodiment, the four cooling water inlets formed in the second multi-way valve MV2 are called a 2-1 opening P21, a 2-3 opening P23, a 2-4 opening P24, and a 2-5 opening P25, and the two cooling water outlets formed in the second multi-way valve MV2 are called a 2-2 opening P22 and a 2-6 opening P26.

[0318] The second multi-way valve MV2 has a second fixed disc FD2 (described below) that has a 2-2 flow hole FD22 that can communicate with the 2-2 opening P22, a 2-3 flow hole FD23 that can communicate with the 2-3 opening P23, a 2-4 flow hole FD24 that can communicate with the 2-4 opening P24, a 2-5 flow hole FD25 that can communicate with the 2-5 opening P25, and a 2-6 flow hole FD26 that can communicate with the 2-6 opening P26. The second multi-way valve MV2 also has a second movable disc MD2 (described below) that rotates while sliding on the second fixed disc FD2. The second movable disc MD2 has a second through hole MD21 and a second communication hole MD22 which communicate with the 2-2 through hole FD22, the 2-3 through hole FD23, the 2-4 through hole FD24, the 2-5 through hole FD25, and the 2-6 through hole FD26.

[0319] The second multi-way valve MV2 is provided in the upward direction DRa2 from the second movable disk MD2 and the second fixed disk FD2, and has a 2-1 opening P21 formed in a port (not shown) that introduces the cooling water into the upper flow path VF2. As shown in Fig. 44, the second multi-way valve MV2 of this embodiment can switch the outlet destination of the cooling water flowing in from the 2-1 opening P21, the 2-4 opening P24, and the 2-5 opening P25 to the 2-2 opening P22, the 2-3 opening P23, and the 2-6 opening P26 depending on the operation mode of the temperature adjustment device.

[0320] Specifically, the second multi-way valve MV2 is operable in such a manner that the 2-1 opening P21 communicates with the 2-2 opening P22, that the 2-1 opening P21 communicates with the 2-2 opening P22 and the 2-5 opening P25 communicates with the 2-6 opening P26, that the 2-1 opening P21 communicates with the 2-2 opening P22 and the 2-4 opening P24 communicates with the 2-6 opening P26, that the 2-1 opening P21 communicates with the 2-2 opening P22 and the 2-4 opening P24 and the 2-5 opening P25 communicate with the 2-6 opening P26, and that the 2-3 opening P23 communicates with the 2-3 opening P24. An operation in which the 2-2 opening P22 communicates with the 2-5 opening P25 and the 2-6 opening P26, an operation in which the 2-3 opening P23 communicates with the 2-2 opening P22 and the 2-4 opening P24 communicates with the 2-6 opening P26, an operation in which the 2-3 opening P23 communicates with the 2-2 opening P22 and the 2-4 opening P24 and the 2-5 opening P25 communicate with the 2-6 opening P26, an operation in which the 2-5 opening P25 communicates with the 2-2 opening P22, an operation in which the 2-4 opening P24 communicates with the 2-2 opening P22, and an operation in which the 2-4 opening P2 an operation in which the 2-4 and 2-5 openings P25 communicate with the 2-2 opening P22, an operation in which the 2-3 opening P23 communicates with the 2-2 opening P22, an operation in which the 2-3 opening P23 and the 2-5 opening P25 communicate with the 2-2 opening P22, an operation in which the 2-3 opening P23 and the 2-4 opening P24 communicate with the 2-2 opening P22, an operation in which the 2-3 opening P23, the 2-4 opening P24 and the 2-5 opening P25 communicate with the 2-2 opening P22, an operation in which the 2-3 opening P23 and the 2-4 opening P24 communicate with the 2-2 opening P22 and the 2-5 opening P25 communicate with the 2-2 opening P22, The operation can be switched to any one of 18 operations, including an operation in which the opening P25 is connected to the 2-6 opening P26, an operation in which the 2-3 opening P23 and the 2-5 opening P25 are connected to the 2-2 opening P22 and the 2-4 opening P24 is connected to the 2-6 opening P26, an operation in which the 2-5 opening P25 is connected to the 2-2 opening P22 and the 2-4 opening P24 is connected to the 2-6 opening P26, and an operation in which the 2-4 opening P24 is connected to the 2-2 opening P22 and the 2-5 opening P25 is connected to the 2-6 opening P26.

[0321] The third multi-way valve MV3 has two cooling water inlets and three cooling water outlets, as shown in Fig. 42. In this embodiment, the two cooling water inlets formed in the third multi-way valve MV3 are called a 3-1 opening P31 and a 3-5 opening P35, and the three cooling water outlets formed in the third multi-way valve MV3 are called a 3-2 opening P32, a 3-3 opening P33, and a 3-4 opening P34.

[0322] The third multi-way valve MV3 has a third fixed disc FD3 (described below) that has a 3-2 flow hole FD32 that can communicate with the 3-2 opening P32, a 3-3 flow hole FD33 that can communicate with the 3-3 opening P33, a 3-4 flow hole FD34 that can communicate with the 3-4 opening P34, and a 3-5 flow hole FD35 that can communicate with the 3-5 opening P35. The third multi-way valve MV3 also has a third movable disc MD3 (described below) that rotates while sliding on the third fixed disc FD3. The third movable disc MD3 has a third movable disc MD3 described below having a third through hole MD31 and a third communication hole MD32 which communicate with the 3-2 through hole FD32, the 3-3 through hole FD33, the 3-4 through hole FD34, and the 3-5 through hole FD35.

[0323] The third multi-way valve MV3 is provided in the upward direction DRa2 from the third movable disk MD3 and the third fixed disk FD3, and a 3-1 opening P31 is formed in a port (not shown) that introduces cooling water into the third multi-way valve MV3. As shown in Fig. 45, the third multi-way valve MV3 of this embodiment can switch the destination of the cooling water flowing in from the 3-1 opening P31 and the 3-5 opening P35 to the 3-2 opening P32, the 3-3 opening P33, and the 3-4 opening P34 depending on the operation mode of the temperature adjustment device.

[0324] Specifically, the third multi-way valve MV3 can be switched to any one of six operations: an operation in which the 3-5 opening P35 is connected to the 3-4 opening P34; an operation in which the 3-1 opening P31 is connected to the 3-3 opening P33; an operation in which the 3-1 opening P31 and the 3-5 opening P35 are connected to the 3-3 opening P33; an operation in which the 3-1 opening P31 is connected to the 3-2 opening P32; an operation in which the 3-1 opening P31 is connected to the 3-2 opening P32 and the 3-5 opening P35 is connected to the 3-3 opening P33; and an operation in which the 3-1 opening P31 is connected to the 3-2 opening P32 and the 3-5 opening P35 is connected to the 3-4 opening P34.

[0325] The fourth multi-way valve MV4 has two cooling water inlets and three cooling water outlets, as shown in Fig. 42. In this embodiment, the two cooling water inlets formed in the fourth multi-way valve MV4 are called a 4-1 opening P41 and a 4-4 opening P44, and the three cooling water outlets formed in the fourth multi-way valve MV4 are called a 4-2 opening P42, a 4-3 opening P43, and a 4-5 opening P45.

[0326] The fourth multi-way valve MV4 has a fourth fixed disc FD4, which will be described later, having a 4-2 flow hole FD42 that can communicate with the 4-2 opening P42, a 4-3 flow hole FD43 that can communicate with the 4-3 opening P43, a 4-4 flow hole FD44 that can communicate with the 4-4 opening P44, and a 4-5 flow hole FD45 that can communicate with the 4-5 opening P45. The fourth multi-way valve MV4 also has a fourth movable disc MD4, shown in FIG. 46, which rotates while sliding on the fourth fixed disc FD4. The fourth movable disc MD4 has a fourth through hole MD41 and a fourth communication hole MD42 that communicate with the 4-2 flow hole FD42, the 4-3 flow hole FD43, the 4-4 flow hole FD44, and the 4-5 flow hole FD45.

[0327] The fourth multi-way valve MV4 is provided in the upward direction DRa2 from the fourth movable disk MD4 and the fourth fixed disk FD4, and a 4-1 opening P41 is formed in a port (not shown) that introduces cooling water into the fourth multi-way valve MV4. As shown in Fig. 47, the fourth multi-way valve MV4 of this embodiment can switch the outlet destination of the cooling water flowing in from the 4-1 opening P41 and the 4-4 opening P44 to a 4-2 opening P42, a 4-3 opening P43, and a 4-5 opening P45 depending on the operation mode of the temperature adjustment device.

[0328] Specifically, the fourth multi-way valve MV4 is operated in such a way that the 4-1 opening P41 communicates with the 4-2 opening P42, that the 4-1 opening P41 communicates with the 4-2 opening P42 and the 4-4 opening P44 communicates with the 4-3 opening P43, that the 4-1 opening P41 communicates with the 4-2 opening P42 and the 4-5 opening P45 and the 4-4 opening P44 communicates with the 4-3 opening P43, and that the 4-1 opening P41 communicates with the 4-2 opening P42 and the 4-5 opening P45 and the 4-4 opening P44 communicates with the 4-3 opening P43. and the operation can be switched to any one of eight operations: an operation in which the 4-4 opening P44 communicates with the 4-3 opening P43, an operation in which the 4-1 opening P41 communicates with the 4-5 opening P45 and the 4-4 opening P44 communicates with the 4-3 opening P43, an operation in which the 4-1 opening P41 communicates with the 4-3 opening P43, and an operation in which the 4-1 opening P41 communicates with the 4-5 opening P45.

[0329] The fifth multi-way valve MV5 has three cooling water inlets and three cooling water outlets, as shown in Fig. 42. In this embodiment, the three cooling water inlets formed in the fifth multi-way valve MV5 are called a 5-2 opening P52, a 5-4 opening P54, and a 5-5 opening P55, and the three cooling water outlets formed in the fifth multi-way valve MV5 are called a 5-1 opening P51, a 5-3 opening P53, and a 5-6 opening P56.

[0330] The fifth multi-way valve MV5 has a fifth fixed disc FD5 having a 5-2 flow hole FD52 that can communicate with the 5-2 opening P52, a 5-3 flow hole FD53 that can communicate with the 5-3 opening P53, a 5-4 flow hole FD54 that can communicate with the 5-4 opening P54, and a 5-5 flow hole FD55 that can communicate with the 5-5 opening P55. The fifth multi-way valve MV5 also has a fifth movable disc MD5 shown in FIG. 48 that rotates while sliding on the fifth fixed disc FD5. The fifth movable disc MD5 has a fifth through hole MD51 and a fifth communication hole MD52 that communicate with the 5-2 flow hole FD52, the 5-3 flow hole FD53, the 5-4 flow hole FD54, the 5-5 flow hole FD55, and the 5-6 flow hole FD56. The fifth multi-way valve MV5 is provided in the upward direction DRa2 from the fifth movable disk MD5 and the fifth fixed disk FD5, and a 5-1 opening P51 is formed in a port (not shown) that introduces cooling water into the fifth multi-way valve MV5. As shown in Fig. 49, the fifth multi-way valve MV5 of this embodiment can switch the destination of the cooling water flowing in from the 5-2 opening P52, the 5-4 opening P54, and the 5-5 opening P55 to the 5-1 opening P51, the 5-3 opening P53, and the 5-6 opening P56 depending on the operation mode of the temperature adjustment device.

[0331] Specifically, the fifth multi-way valve MV5 is operable in such a manner that the 5-2 opening P52 communicates with the 5-6 opening P56, the 5-4 opening P54 communicates with the 5-6 opening P56, the 5-2 opening P52 communicates with the 5-3 opening P53 and the 5-4 opening P54 communicates with the 5-6 opening P56, the 5-5 opening P55 communicates with the 5-6 opening P56, and the 5-4 opening P The operation can be switched to any one of seven operations: an operation in which 5-5 opening P54 communicates with the 5-1 opening P51, an operation in which the 5-2 opening P52 communicates with the 5-3 opening P53 and the 5-4 opening P54 communicates with the 5-1 opening P51, and an operation in which the 5-2 opening P52 communicates with the 5-3 opening P53 and the 5-5 opening P55 communicates with the 5-6 opening P56.

[0332] Next, the flow of cooling water flowing through the fluid circuit system 1 when the temperature adjustment device of this embodiment executes various operation modes will be described. In the fluid circuit system 1 of this embodiment, the operation of each of the first multi-way valve MV1 to the fifth multi-way valve MV5 is switched depending on the operation mode of the temperature adjustment device. Below, the flow of cooling water flowing through the fluid circuit system 1 when executing four representative operation modes among the operation modes executed by the temperature adjustment device of this embodiment will be described with reference to Figs. 50 to 53. Note that in Figs. 50 to 53, the flow of cooling water circulating through the fluid circuit system 1 is indicated by arrows thicker than the arrows indicating the fluid circuit FC.

[0333] (1) Mode 2-1 In the 2-1 mode, the fluid circuit system 1 circulates the cooling water as shown in Fig. 50. Specifically, in the 2-1 mode, the fluid circuit system 1 operates the first pump P1 and the second pump P2 to circulate the cooling water between the battery BT and the chiller CH. Also, in the 2-1 mode, the fluid circuit system 1 operates the fourth pump P4 to circulate the cooling water between the radiator LT and the driving heat generating part PT.

[0334] When the fluid circuit system 1 circulates the cooling water in this way, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to communicate the 2-1 opening P21, which is the cooling water inlet, with the 2-2 opening P22, which is the cooling water outlet. Also, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-1 opening P31, which is the cooling water inlet, with the 3-3 opening P33, which is the cooling water outlet. Furthermore, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-5 opening P35, which is the cooling water inlet, with the 3-4 opening P34, which is the cooling water outlet. And the fourth multi-way valve MV4 needs to adjust the rotational position of the fourth movable disc MD4 to communicate the 4-1 opening P41, which is the cooling water inlet, with the 4-2 opening P42, which is the cooling water outlet. Also, the fifth multi-way valve MV5 needs to adjust the rotational position of the fifth movable disc MD5 to connect the 5-2 opening P52, which is the cooling water inlet, with the 5-6 opening P56, which is the cooling water outlet.

[0335] (2) Mode 2-2 In the 2-2 mode, the fluid circuit system 1 circulates the cooling water as shown in FIG. 51. Specifically, in the 2-2 mode, the fluid circuit system 1 operates the first pump P1 and the second pump P2 to circulate the cooling water between the battery BT and the chiller CH. In the 2-2 mode, the fluid circuit system 1 operates the fourth pump P4 to circulate the cooling water between the radiator LT and the driving heat generating part PT. In the 2-2 mode, the fluid circuit system 1 also operates the third pump P3 to circulate the cooling water between the heater core HC and the electric heater EH.

[0336] When the fluid circuit system 1 circulates the cooling water in this way, the first multi-way valve MV1 needs to adjust the rotational position of the first movable disc MD1 to connect the 1-3 opening P13, which is the cooling water inlet, to the 1-4 opening P14, which is the cooling water outlet. Also, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to connect the 2-1 opening P21, which is the cooling water inlet, to the 2-2 opening P22, which is the cooling water outlet. Furthermore, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to connect the 2-5 opening P25, which is the cooling water inlet, to the 2-6 opening P26, which is the cooling water outlet.

[0337] Also, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-1 opening P31, which is the cooling water inlet, with the 3-3 opening P33, which is the cooling water outlet. Furthermore, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-5 opening P35, which is the cooling water inlet, with the 3-4 opening P34, which is the cooling water outlet. And the fourth multi-way valve MV4 needs to adjust the rotational position of the fourth movable disc MD4 to communicate the 4-1 opening P41, which is the cooling water inlet, with the 4-2 opening P42, which is the cooling water outlet. Furthermore, the fifth multi-way valve MV5 needs to adjust the rotational position of the fifth movable disc MD5 to communicate the 5-2 opening P52, which is the cooling water inlet, with the 5-6 opening P56, which is the cooling water outlet.

[0338] (3) Mode 2-3 In the 2-3 mode, the fluid circuit system 1 circulates the cooling water as shown in FIG. 52. Specifically, in the 2-3 mode, the fluid circuit system 1 operates the first pump P1 and the second pump P2 to circulate the cooling water between the battery BT and the chiller CH. In the 2-3 mode, the fluid circuit system 1 operates the fourth pump P4 to circulate the cooling water between the radiator LT and the driving heat generating part PT. In the 2-3 mode, the fluid circuit system 1 also operates the third pump P3 to circulate the cooling water between the heater core HC and the water-cooled condenser WC.

[0339] When the fluid circuit system 1 circulates the cooling water in this way, the first multi-way valve MV1 needs to adjust the rotational position of the first movable disc MD1 to connect the 1-3 opening P13, which is the cooling water inlet, to the 1-1 opening P11, which is the cooling water outlet. Also, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to connect the 2-1 opening P21, which is the cooling water inlet, to the 2-2 opening P22, which is the cooling water outlet. Furthermore, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to connect the 2-4 opening P24, which is the cooling water inlet, to the 2-6 opening P26, which is the cooling water outlet.

[0340] Also, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-1 opening P31, which is the cooling water inlet, with the 3-3 opening P33, which is the cooling water outlet. Furthermore, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-5 opening P35, which is the cooling water inlet, with the 3-4 opening P34, which is the cooling water outlet. And the fourth multi-way valve MV4 needs to adjust the rotational position of the fourth movable disc MD4 to communicate the 4-1 opening P41, which is the cooling water inlet, with the 4-2 opening P42, which is the cooling water outlet. Furthermore, the fifth multi-way valve MV5 needs to adjust the rotational position of the fifth movable disc MD5 to communicate the 5-2 opening P52, which is the cooling water inlet, with the 5-6 opening P56, which is the cooling water outlet.

[0341] (4) Modes 2-4 In the 2-4 mode, the fluid circuit system 1 circulates the cooling water as shown in FIG. 53. Specifically, in the 2-4 mode, the fluid circuit system 1 operates the first pump P1 and the second pump P2 to circulate the cooling water between the battery BT and the chiller CH. In the 2-3 mode, the fluid circuit system 1 operates the fourth pump P4 to circulate the cooling water between the radiator LT and the driving heat generating part PT. Furthermore, in the 2-3 mode, the fluid circuit system 1 operates the third pump P3 to circulate the cooling water between the heater core HC, the electric heater EH, and the water-cooled condenser WC.

[0342] When the fluid circuit system 1 circulates the cooling water in this way, the first multi-way valve MV1 needs to adjust the rotational position of the first movable disc MD1 to connect the 1-3 opening P13, which is the cooling water inlet, to the 1-1 opening P11 and the 1-4 opening P14, which are the cooling water outlets. Also, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to connect the 2-1 opening P21, which is the cooling water inlet, to the 2-2 opening P22, which is the cooling water outlet. Furthermore, the second multi-way valve MV2 needs to adjust the rotational position of the second movable disc MD2 to connect the 2-4 opening P24 and the 2-5 opening P25, which are the cooling water inlet, to the 2-6 opening P26, which is the cooling water outlet.

[0343] Also, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-1 opening P31, which is the cooling water inlet, with the 3-3 opening P33, which is the cooling water outlet. Furthermore, the third multi-way valve MV3 needs to adjust the rotational position of the third movable disc MD3 to communicate the 3-5 opening P35, which is the cooling water inlet, with the 3-4 opening P34, which is the cooling water outlet. And the fourth multi-way valve MV4 needs to adjust the rotational position of the fourth movable disc MD4 to communicate the 4-1 opening P41, which is the cooling water inlet, with the 4-2 opening P42, which is the cooling water outlet. Furthermore, the fifth multi-way valve MV5 needs to adjust the rotational position of the fifth movable disc MD5 to communicate the 5-2 opening P52, which is the cooling water inlet, with the 5-6 opening P56, which is the cooling water outlet.

[0344] Here, it is assumed that in the fluid circuit system 1 of this embodiment, the second multi-way valve MV2 is configured to be blocked so that the unnecessary inlet and the unnecessary outlet of the second multi-way valve MV2 are blocked when the temperature adjustment device executes the four operating modes.

[0345] When the temperature adjustment device executes the 2-1 mode and the second multi-way valve MV2 is in a closed configuration, the second multi-way valve MV2 needs to close the 2-2 opening P22, the 2-3 opening P23, the 2-4 opening P24, and the 2-5 opening P25. When the temperature adjustment device executes the 2-2 mode and the second multi-way valve MV2 is in a closed configuration, the second multi-way valve MV2 needs to close the 2-3 opening P23 and the 2-4 opening P24. When the temperature adjustment device executes the 2-3 mode and the second multi-way valve MV2 is in a closed configuration, the second multi-way valve MV2 needs to close the 2-3 opening P23 and the 2-5 opening P25. When the temperature adjustment device executes the 2-4 mode and the second multi-way valve MV2 is in a closed configuration, the second multi-way valve MV2 needs to close the 2-3 opening P23.

[0346] A comparative example in which the second multi-way valve MV2 is thus in a closed configuration in all four operating modes will be described with reference to the comparative examples of Figures 54 to 57. Figures 54 to 57 show a comparative second fixed disk CFD2 and a comparative second movable disk CMD2 for the fluid circuit system 1 to close the unwanted inlets and unwanted outlets of each of the second multi-way valves MV2 in all four operating modes.

[0347] 54, the communication range between the second through hole MD21 and the 2-2 flow hole FD22 is narrow when the temperature adjustment device is operating in the 2-2 mode. Also, the communication range between the second communication hole MD22 and the 2-4 flow hole FD24 and the communication range between the second communication hole MD22 and the 2-6 flow hole FD26 are narrow when the temperature adjustment device is operating in the 2-4 mode.

[0348] If the cooling water is caused to flow through such a portion with a narrow communication range, the pressure loss that occurs when the cooling water flows is likely to be large. Such an increase in pressure loss increases the pressure loss of the entire fluid circuit system 1, which is undesirable.

[0349] Here, according to the inventor's careful study, it was found that the four operation modes can be realized by increasing the size of the second communication hole MD22 of the second multi-way valve MV2 so as not to necessarily block the unneeded inlet and outlet. The fluid circuit system 1 of this embodiment having the second multi-way valve MV2 with the increased size of the second communication hole MD22 will be described with reference to Figures 58 to 64.

[0350] The reason why the second multi-way valve MV2 is not necessarily configured to close the unneeded inlet and outlet is that the second multi-way valve MV2 has many more operation patterns than the first multi-way valve MV1, the second multi-way valve MV2, the third multi-way valve MV3, and the fifth multi-way valve MV5. In other words, if the second multi-way valve MV2 were necessarily configured to close the unneeded inlet and outlet, the second multi-way valve MV2 would have a more complicated structure than the first multi-way valve MV1, the second multi-way valve MV2, the third multi-way valve MV3, and the fifth multi-way valve MV5.

[0351] In each of the four operating modes, the rotational positions of the second movable disc MD2 of the second multi-way valve MV2, the third movable disc MD3 of the third multi-way valve MV3, the fourth movable disc MD4 of the fourth multi-way valve MV4, and the fifth fixed disc FD5 of the fifth multi-way valve MV5 are the same. For this reason, the operation of the second multi-way valve MV2, the third multi-way valve MV3, the fourth multi-way valve MV4, and the fifth multi-way valve MV5 will only be described for mode 2-1, and descriptions for the other modes will be omitted.

[0352] First, the 2-1 mode will be described. When the operation mode of the temperature adjustment device is set to the 2-1 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 58. Specifically, when the operation mode is set to the 2-1 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 communicates with the 1-1 flow hole FD11, and the first communication hole MD12 is positioned at a position where it communicates with the 1-3 flow hole FD13.

[0353] As a result, the 1-2 opening P12 communicates with the 1-1 opening P11 via the first through hole MD11 and the 1-1 flow hole FD11. Also, the 1-3 opening P13 and the 1-4 opening P14 are closed.

[0354] When the operation mode of the temperature adjustment device is set to the 2-1 mode, the second movable disc MD2 is positioned so that the second through hole MD21 communicates with the 2-2 flow hole FD22. The second movable disc MD2 is positioned so that the second communication hole MD22 communicates with the 2-4 flow hole FD24, the 2-5 flow hole FD25, and the 2-6 flow hole FD26.

[0355] As a result, the 2-1 opening P21 communicates with the 2-2 opening P22 via the second through hole MD21 and the 2-2 communication hole FD22. The 2-4 opening P24 communicates with the 2-6 opening P26 via the 2-4 communication hole FD24, the second communication hole MD22, and the 2-6 communication hole FD26. The 2-5 opening P25 communicates with the 2-6 opening P26 via the 2-5 communication hole FD25, the second communication hole MD22, and the 2-6 communication hole FD26. The 2-3 opening P23 is closed.

[0356] Furthermore, when the operation mode of the temperature adjustment device is set to the 2-1 mode, the third movable disc MD3 is positioned so that the third through hole MD31 communicates with the 3-3 flow hole FD33. The third movable disc MD3 is positioned so that the third communication hole MD32 communicates with the 3-4 flow hole FD34 and the 3-5 flow hole FD35.

[0357] As a result, the 3-1 opening P31 communicates with the 3-3 opening P33 via the third through hole MD31 and the 3-3 communication hole FD33. The 3-5 opening P35 communicates with the 3-4 opening P34 via the third communication hole MD32 and the 3-4 communication hole FD34. The 3-2 opening P32 is closed.

[0358] Furthermore, when the operating mode of the temperature adjustment device is set to mode 2-1, the fourth movable disc MD4 is positioned at a position where the fourth through hole MD41 communicates with the 4-2 flow hole FD42, and the fourth communication hole MD42 is positioned opposite the fourth partition portion FD4d.

[0359] As a result, the 4-1 opening P41 communicates with the 4-2 opening P42 via the fourth through hole MD41 and the 4-2 communication hole FD42. Moreover, the 4-3 opening P43 and the 4-5 opening P45 are closed.

[0360] Furthermore, when the operating mode of the temperature control device is set to mode 2-1, the fifth movable disc MD5 is positioned at a position where the fifth through hole MD51 communicates with the fifth-6 circulation hole FD56, and the fifth communication hole MD52 is positioned at a position where it communicates with the fifth-3 circulation hole FD53.

[0361] As a result, the 5-2 opening P52 communicates with the 5-6 opening P56 via the 5th through hole MD51 and the 5-6 communication hole FD56. Also, the 5-1 opening P51, the 5-3 opening P53, the 5-4 opening P54, and the 5-5 opening P55 are closed.

[0362] The flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and the cooling water outlet of each of the first multi-way valve MV1 to the fifth multi-way valve MV5 are set in this manner will be described with reference to FIG.

[0363] As described above, in the 2-1 mode, the fluid circuit system 1 communicates the 2-1 opening P21 of the second multi-way valve MV2 with the 2-2 opening P22. The fluid circuit system 1 also communicates the 3-1 opening P31 of the third multi-way valve MV3 with the 3-3 opening P33 and the 3-5 opening P35 with the 3-4 opening P34. The fluid circuit system 1 also communicates the 4-1 opening P41 of the fourth multi-way valve MV4 with the 4-2 opening P42 and the 5-2 opening P52 of the fifth multi-way valve MV5 with the 5-6 opening P56.

[0364] As a result, the fluid circuit system 1 can circulate the cooling water in the fluid circuit FC by operating the first pump P1 and the second pump P2. The fluid circuit system 1 can then guide the cooling water to the battery BT and the chiller CH. The fluid circuit system 1 can also circulate the cooling water in the fluid circuit FC by operating the fourth pump P4. The fluid circuit system 1 can then guide the cooling water to the radiator LT and the driving heat generating part PT.

[0365] However, in the fluid circuit system 1 of this embodiment, the 1-2 opening P12, which is an undesired inlet of the first multi-way valve MV1, is connected to the 1-1 opening P11, which is an undesired outlet. Also, the fluid circuit system 1 connects the 2-4 opening P24 and the 2-5 opening P25, which are undesired inlets of the second multi-way valve MV2, to the 2-6 opening P26, which is an undesired outlet. In this case, there is a risk that the cooling water pumped by the third pump P3 passes through the first multi-way valve MV1 and the second multi-way valve MV2 and flows into the electric heater EH and the water-cooled condenser WC, which do not require the flow of cooling water.

[0366] In contrast, in the fluid circuit system 1 of the present embodiment, in the 2-1 mode, the 1-3 opening P13 of the first multi-way valve MV1 connected to the refrigerant flow downstream side of the fluid circuit FC in which the electric heater EH and the water-cooled condenser WC are arranged is closed. In addition, in the fluid circuit system 1, in the 2-1 mode, the 1-4 opening P14 of the first multi-way valve MV1 connected to the refrigerant flow upstream side of the fluid circuit FC in which the electric heater EH is arranged is closed. This makes it possible to prevent the cooling water pumped by the third pump P3 from flowing through the fluid circuit FC to the water-cooled condenser WC. That is, the fluid circuit system 1 can prohibit the flow of the cooling water that may pass through the unnecessary inlet and the unnecessary outlet that are in the open state in the second multi-way valve MV2, by the first multi-way valve MV1 different from the second multi-way valve MV2.

[0367] In addition, in the 2-1 mode, the fluid circuit system 1 of this embodiment does not operate the third pump P3. Therefore, the 1-2 opening P12 of the first multi-way valve MV1 communicates with the 1-1 opening P11, the 2-4 opening P24 and the 2-5 opening P25 of the second multi-way valve MV2 communicate with the 2-6 opening P26, and the fluid circuit FC in which the water-cooled condenser WC is arranged can circulate the cooling water. Even in this case, the cooling water does not flow into the water-cooled condenser WC. That is, the fluid circuit system 1 can open the unnecessary inlet and the unnecessary outlet that communicate the circuit in which the first pump P1, which does not operate in the 2-1 mode, is arranged.

[0368] Next, the 2-2 mode will be described. When the operation mode of the temperature adjustment device is set to the 2-2 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 60. Specifically, when the operation mode is set to the 2-2 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 faces the first partition portion FD1d. In addition, the first movable disc MD1 is positioned at a position where the first communication hole MD12 communicates with the 1-3 circulation hole FD13 and the 1-4 circulation hole FD14.

[0369] As a result, the 1-3 opening P13 communicates with the 1-4 opening P14 via the 1-3 communication hole FD13, the first communication hole MD12, and the 1-4 communication hole FD14. Also, the 1-1 opening P11 and the 1-2 opening P12 are closed.

[0370] The flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and the cooling water outlet of each of the first multi-way valve MV1 to the fifth multi-way valve MV5 are set in this manner will be described with reference to FIG.

[0371] As described above, in the 2-2 mode, the fluid circuit system 1 communicates the 1-3 opening P13 of the first multi-way valve MV1 with the 1-4 opening P14, and the 2-1 opening P21 of the second multi-way valve MV2 with the 2-2 opening P22. The fluid circuit system 1 also communicates the 3-1 opening P31 of the third multi-way valve MV3 with the 3-3 opening P33, and the 3-5 opening P35 with the 3-4 opening P34. The fluid circuit system 1 also communicates the 4-1 opening P41 of the fourth multi-way valve MV4 with the 4-2 opening P42, and the 5-2 opening P52 of the fifth multi-way valve MV5 with the 5-6 opening P56.

[0372] As a result, the fluid circuit system 1 can circulate the cooling water in the fluid circuit FC by operating the first pump P1 and the second pump P2. The fluid circuit system 1 can guide the cooling water to the battery BT and the chiller CH. The fluid circuit system 1 can also circulate the cooling water in the fluid circuit FC by operating the fourth pump P4. The fluid circuit system 1 can guide the cooling water to the radiator LT and the driving heat generating part PT. Furthermore, the fluid circuit system 1 can circulate the cooling water in the fluid circuit FC by operating the third pump P3. The fluid circuit system 1 can also guide the cooling water to the heater core HC and the electric heater EH.

[0373] However, in the fluid circuit system 1 of the present embodiment, the 2-4 opening P24, which is an unnecessary inlet of the second multi-way valve MV2, is connected to the 2-6 opening P26. In this case, there is a risk that the cooling water pumped by the third pump P3 passes through the first multi-way valve MV1 and the second multi-way valve MV2 and flows into the water-cooled condenser WC, which does not require the flow of cooling water.

[0374] In contrast, in the fluid circuit system 1 of this embodiment, in the 2-2 mode, the 1-1 opening P11 of the first multi-way valve MV1 connected to the upstream side of the refrigerant flow of the fluid circuit FC in which the water-cooled condenser WC is arranged is closed. This makes it possible to prevent the cooling water pumped by the third pump P3 from flowing through the fluid circuit FC to the water-cooled condenser WC. In other words, the fluid circuit system 1 can use the first multi-way valve MV1, which is different from the second multi-way valve MV2, to prohibit the flow of cooling water that may pass through the unnecessary inlet port that is in an open state in the second multi-way valve MV2.

[0375] Next, the 2-3 mode will be described. When the operation mode of the temperature adjustment device is set to the 2-3 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 62. Specifically, when the operation mode is set to the 2-3 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 faces the first partition portion FD1d. In addition, the first movable disc MD1 is positioned at a position where the first communication hole MD12 communicates with the 1-1 circulation hole FD11 and the 1-3 circulation hole FD13.

[0376] As a result, the 1-3 opening P13 communicates with the 1-1 opening P11 via the 1-3 communication hole FD13, the first communication hole MD12, and the 1-1 communication hole FD11. Also, the 1-2 opening P12 and the 1-4 opening P14 are closed.

[0377] The flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and the cooling water outlet of each of the first multi-way valve MV1 to the fifth multi-way valve MV5 are set in this manner will be described with reference to FIG.

[0378] As described above, in the 2-3 mode, the fluid circuit system 1 communicates the 1-3 opening P13 of the first multi-way valve MV1 with the 1-1 opening P11. The fluid circuit system 1 also communicates the 2-1 opening P21 of the second multi-way valve MV2 with the 2-2 opening P22 and communicates the 2-4 opening P24 with the 2-6 opening P26. The fluid circuit system 1 also communicates the 3-1 opening P31 of the third multi-way valve MV3 with the 3-3 opening P33 and communicates the 3-5 opening P35 with the 3-4 opening P34. The fluid circuit system 1 also communicates the 4-1 opening P41 of the fourth multi-way valve MV4 with the 4-2 opening P42 and communicates the 5-2 opening P52 of the fifth multi-way valve MV5 with the 5-6 opening P56.

[0379] As a result, the fluid circuit system 1 can circulate the cooling water in the fluid circuit FC by operating the first pump P1 and the second pump P2. The fluid circuit system 1 can guide the cooling water to the battery BT and the chiller CH. The fluid circuit system 1 can also circulate the cooling water in the fluid circuit FC by operating the fourth pump P4. The fluid circuit system 1 can guide the cooling water to the radiator LT and the driving heat generating part PT. Furthermore, the fluid circuit system 1 can circulate the cooling water in the fluid circuit FC by operating the third pump P3. The fluid circuit system 1 can also guide the cooling water to the heater core HC and the water-cooled condenser WC.

[0380] However, in the fluid circuit system 1 of the present embodiment, the 2-5 opening P25, which is an unnecessary inlet of the second multi-way valve MV2, is connected to the 2-6 opening P26. In this case, there is a risk that the cooling water pumped by the third pump P3 passes through the first multi-way valve MV1 and the second multi-way valve MV2 and flows into the electric heater EH, which does not require the flow of cooling water.

[0381] In contrast, in the fluid circuit system 1 of this embodiment, in the 2-3 mode, the 1-4 opening P14 of the first multi-way valve MV1 connected to the upstream side of the refrigerant flow of the fluid circuit FC in which the electric heater EH is arranged is closed. This makes it possible to prevent the cooling water pumped by the third pump P3 from flowing through the fluid circuit FC to the electric heater EH. In other words, the fluid circuit system 1 can use the first multi-way valve MV1, which is different from the second multi-way valve MV2, to prohibit the flow of cooling water that may pass through the unnecessary inlet port that is in an open state in the second multi-way valve MV2.

[0382] Next, the 2-4 mode will be described. When the operation mode of the temperature adjustment device is set to the 2-4 mode, the first movable disc MD1 is positioned at the rotational position shown in Fig. 64. Specifically, when the operation mode is set to the 2-4 mode, the first movable disc MD1 is positioned at a position where the first through hole MD11 faces the first partition portion FD1d. In addition, the first movable disc MD1 is positioned at a position where the first communication hole MD12 communicates with the 1-1 circulation hole FD11, the 1-3 circulation hole FD13, and the 1-4 circulation hole FD14.

[0383] The flow of cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and the cooling water outlet of each of the first multi-way valve MV1 to the fifth multi-way valve MV5 are set in this manner will be described.

[0384] As described above, in the 2-4 mode, the fluid circuit system 1 communicates the 1-3 opening P13 of the first multi-way valve MV1 with the 1-1 opening P11 and the 1-4 opening P14. The fluid circuit system 1 also communicates the 2-1 opening P21 of the second multi-way valve MV2 with the 2-2 opening P22 and communicates the 2-4 opening P24 with the 2-6 opening P26. The fluid circuit system 1 also communicates the 3-1 opening P31 of the third multi-way valve MV3 with the 3-3 opening P33 and communicates the 3-5 opening P35 with the 3-4 opening P34. The fluid circuit system 1 also communicates the 4-1 opening P41 of the fourth multi-way valve MV4 with the 4-2 opening P42 and communicates the 5-2 opening P52 of the fifth multi-way valve MV5 with the 5-6 opening P56.

[0385] As a result, the fluid circuit system 1 can circulate the cooling water in the fluid circuit FC by operating the first pump P1 and the second pump P2. The fluid circuit system 1 can guide the cooling water to the battery BT and the chiller CH. The fluid circuit system 1 can also circulate the cooling water in the fluid circuit FC by operating the fourth pump P4. The fluid circuit system 1 can guide the cooling water to the radiator LT and the driving heat generating part PT. Furthermore, the fluid circuit system 1 can circulate the cooling water in the fluid circuit FC by operating the third pump P3. The fluid circuit system 1 can also guide the cooling water to the heater core HC, the electric heater EH, and the water-cooled condenser WC.

[0386] In the 2-4 mode, the waste air inlet and the waste air outlet of each of the first multi-way valve MV1 to the fifth multi-way valve MV5 are closed.

[0387] This results in fewer restrictions on the first multi-way valve MV1 to the third multi-way valve MV3 compared to when the fluid circuit system 1 is configured to block the unwanted inlet and outlet of each of the first multi-way valve MV1 to the fifth multi-way valve MV5 when the temperature adjustment device executes the four operating modes.

[0388] For example, when the second multi-way valve MV2 is in a closed configuration, it is necessary to close the unnecessary inlet and the unnecessary outlet of the second multi-way valve MV2 in all four operation modes. In this case, as described above, when the temperature adjustment device executes the 2-2 mode, the communication range between the second through hole MD21 and the 2-2 circulation hole FD22 is narrow. Also, when the temperature adjustment device executes the 2-4 mode, the communication range between the second communication hole MD22 and the 2-4 circulation hole FD24 and the communication range between the second communication hole MD22 and the 2-6 circulation hole FD26 are narrow.

[0389] In response to this, the second multi-way valve MV2 is configured to be closed. The flow of cooling water that may pass through the unnecessary inlet port that is in the open state in the second multi-way valve MV2 can be prohibited by the first multi-way valve MV1, which is different from the second multi-way valve MV2. This allows the size of the second communication hole MD22 to be large. This makes it possible to suppress an increase in pressure loss caused by flowing cooling water through a portion with a narrow communication range.

[0390] This makes it possible to reduce the power consumption of the first pump P1, the second pump P2, the third pump P3, and the fourth pump P4 that generate a fluid flow in the fluid circuit FC, thereby reducing the running costs of the entire fluid circuit system 1.

[0391] Furthermore, by suppressing the pressure loss when the fluid flows through the second multi-way valve MV2, the capacities of the first pump P1, the second pump P2, the third pump P3, and the fourth pump P4 can be reduced, thereby reducing the initial cost of the entire fluid circuit system 1.

[0392] Furthermore, in this embodiment, the rotational position of the second movable disc MD2 of the second multi-way valve MV2 can be made common in each of the 2-1 mode, 2-2 mode, 2-3 mode, and 2-4 mode of the temperature adjustment device. Therefore, it is not necessary to adjust the rotational position of the second movable disc MD2 when switching the operation mode of the temperature adjustment device from one of these four operation modes to a different operation mode. This makes it possible to reduce the power consumption of the second multi-way valve MV2. Therefore, it is possible to reduce the running costs of the entire fluid circuit system 1.

[0393] Third embodiment Next, a third embodiment will be described with reference to Figures 65 to 71. This embodiment differs from the second embodiment in that the second multi-way valve MV2 is replaced with a sixth multi-way valve MV6, and a part of the fluid circuit FC is modified in accordance with the replacement with the sixth multi-way valve MV6. The rest of this embodiment is similar to the second embodiment. Therefore, in this embodiment, the parts that differ from the second embodiment will be mainly described, and a description of the parts that are similar to the second embodiment may be omitted.

[0394] As shown in Fig. 65, the sixth multi-way valve MV6 of this embodiment is configured as a five-way valve having three cooling water inlets and two cooling water outlets. Specifically, the sixth multi-way valve MV6 has a 6-1 opening P61, a 6-3 opening P63, and a 6-4 opening P64 which are cooling water inlets, and further has a 6-2 opening P62 and a 6-5 opening P65 which are cooling water outlets.

[0395] The fluid circuit system 1 of this embodiment has a configuration of a 5-way valve instead of a 6-way valve, and the number of cooling water inlets is reduced, compared to the second multi-way valve MV2 of the second embodiment. However, the fluid circuit system 1 of this embodiment is compatible with all of the operation modes that the temperature adjustment device of the second embodiment can perform. That is, the sixth multi-way valve MV6 of this embodiment is compatible with all of the 18 operations of the second multi-way valve MV2 described in the second embodiment. The reason why the sixth multi-way valve MV6 is compatible with all of the 18 operations of the second multi-way valve MV2, even though it has one fewer cooling water inlet than the second multi-way valve MV2 of the second embodiment, will be described.

[0396] As described in the second embodiment, the second multi-way valve MV2 can perform any one of 18 operations. Here, the inventor considered grouping similar operations out of the 18 operations of the second multi-way valve MV2. Specifically, as shown in FIG. 66, the inventor considered grouping the 18 operations into a group of operations that causes cooling water to flow into the 2-1 opening P21, which is a cooling water inlet, a group of operations that does not cause cooling water to flow out from the 2-6 opening P26, which is a cooling water outlet, a group of operations including an operation of guiding cooling water from the 2-4 opening P24 to the 2-6 opening P26 and guiding cooling water from the 2-5 opening P25 to the 2-2 opening P22, and a group of operations including an operation of guiding cooling water from the 2-4 opening P24 to the 2-2 opening P22 and guiding cooling water from the 2-5 opening P25 to the 2-6 opening P26.

[0397] Hereinafter, the operation of the first group that causes the cooling water to flow into the 2-1 opening P21, which is the cooling water inlet, is called the operation of the first group, and the operation of the first group that does not cause the cooling water to flow out from the 2-6 opening P26, which is the cooling water outlet, is called the operation of the second group. The operation of the first group including the operation of guiding the cooling water from the 2-4 opening P24 to the 2-6 opening P26 and the operation of guiding the cooling water from the 2-5 opening P25 to the 2-2 opening P22 is called the operation of the third group. The operation of the first group including the operation of guiding the cooling water from the 2-4 opening P24 to the 2-2 opening P22 and the operation of guiding the cooling water from the 2-5 opening P25 to the 2-6 opening P26 is called the operation of the fourth group. In FIG. 66, the operation of the first group, the operation of the second group, the operation of the third group, and the operation of the fourth group are each surrounded by a square.

[0398] The first group of operations includes an operation in which the 2-1 opening P21 communicates with the 2-2 opening P22, an operation in which the 2-1 opening P21 communicates with the 2-2 opening P22 and the 2-5 opening P25 communicates with the 2-6 opening P26, an operation in which the 2-1 opening P21 communicates with the 2-2 opening P22 and the 2-4 opening P24 communicates with the 2-6 opening P26, an operation in which the 2-1 opening P21 communicates with the 2-2 opening P22 and the 2-4 opening P24 and the 2-5 opening P25 communicate with the 2-6 opening P26, and an operation in which the 2-1 opening P21 communicates with the 2-2 opening P22 and the 2-4 opening P24 and the 2-5 opening P25 communicate with the 2-6 opening P26. These include an operation in which the 2-3 opening P23 communicates with the 2-2 opening P22 and the 2-5 opening P25 communicates with the 2-6 opening P26, an operation in which the 2-3 opening P23 communicates with the 2-2 opening P22 and the 2-4 opening P24 communicates with the 2-6 opening P26, and an operation in which the 2-3 opening P23 communicates with the 2-2 opening P22 and the 2-4 opening P24 and the 2-5 opening P25 communicate with the 2-6 opening P26.

[0399] The second group of operations includes an operation in which the 2-5 opening P25 is connected to the 2-2 opening P22, an operation in which the 2-4 opening P24 is connected to the 2-2 opening P22, an operation in which the 2-4 opening P24 and the 2-5 opening P25 are connected to the 2-2 opening P22, an operation in which the 2-3 opening P23 is connected to the 2-2 opening P22, an operation in which the 2-3 opening P23 and the 2-5 opening P25 are connected to the 2-2 opening P22, an operation in which the 2-3 opening P23 and the 2-4 opening P24 are connected to the 2-2 opening P22, and an operation in which the 2-3 opening P23, the 2-4 opening P24 and the 2-5 opening P25 are connected to the 2-2 opening P22.

[0400] The third group of operations includes an operation in which the 2-3 opening P23 and the 2-5 opening P25 are connected to the 2-2 opening P22 and the 2-4 opening P24 is connected to the 2-6 opening P26, and an operation in which the 2-5 opening P25 is connected to the 2-2 opening P22 and the 2-4 opening P24 is connected to the 2-6 opening P26.

[0401] The fourth group of operations includes an operation in which the 2-4 opening P24 is connected to the 2-2 opening P22 and the 2-5 opening P25 is connected to the 2-6 opening P26, and an operation in which the 2-3 opening P23 and the 2-4 opening P24 are connected to the 2-2 opening P22 and the 2-5 opening P25 is connected to the 2-6 opening P26.

[0402] The inventors then considered the operation of the second multi-way valve MV2 that can correspond to each of these four groups of operations.

[0403] Specifically, as shown in Fig. 66, the operation of the first group is included in the operation in which the 2-1 opening P21 and the 2-3 opening P23 communicate with the 2-2 opening P22, and the 2-4 opening P24 and the 2-5 opening P25 communicate with the 2-6 opening P26. Therefore, the operation of the first group can be replaced with the operation in which the 2-1 opening P21 and the 2-3 opening P23 communicate with the 2-2 opening P22, and the 2-4 opening P24 and the 2-5 opening P25 communicate with the 2-6 opening P26.

[0404] Furthermore, the operation of the second group is included in the operation in which the 2-3 opening P23, the 2-4 opening P24, and the 2-5 opening P25 communicate with the 2-2 opening P22. For this reason, the operation of the second group can be replaced with the operation in which the 2-3 opening P23, the 2-4 opening P24, and the 2-5 opening P25 communicate with the 2-2 opening P22.

[0405] The operation of the third group is included in the operation in which the 2-3 opening P23 and the 2-5 opening P25 communicate with the 2-2 opening P22 and the 2-4 opening P24 communicates with the 2-6 opening P26. For this reason, the operation of the third group can be replaced with the operation in which the 2-3 opening P23 and the 2-5 opening P25 communicate with the 2-2 opening P22 and the 2-4 opening P24 communicates with the 2-6 opening P26.

[0406] Furthermore, the operation of the fourth group is included in the operation in which the 2-3 opening P23 and the 2-4 opening P24 communicate with the 2-2 opening P22 and the 2-5 opening P25 communicates with the 2-6 opening P26. For this reason, the operation of the fourth group can be replaced with the operation in which the 2-3 opening P23 and the 2-4 opening P24 communicate with the 2-2 opening P22 and the 2-5 opening P25 communicates with the 2-6 opening P26.

[0407] In this way, the 18 operations of the second multi-way valve MV2 can be replaced with 4 operations. By replacing the 18 operations of the second multi-way valve MV2 with 4 operations, when each operation mode of the temperature adjustment device is executed, the unnecessary inlet and the unnecessary outlet of the second multi-way valve MV2 are opened, which may cause cooling water to flow to connected devices that do not require the flow of cooling water.

[0408] However, the fluid circuit system 1 of the present embodiment can block the openings of the first multi-way valve MV1, etc., different from the second multi-way valve MV2, to prevent the flow of cooling water that may pass through the unneeded inlet and unneeded outlet that are in the open state in the second multi-way valve MV2. Therefore, in the fluid circuit system 1 of the present embodiment, even if the 18 operations of the second multi-way valve MV2 are replaced with four operations, it is possible to prevent the cooling water from flowing into connected devices that do not require the flow of cooling water.

[0409] Here, the inventors have focused on the four operations replaced from the 18 operations of the second multi-way valve MV2 and have studied further simplifying the configuration of the second multi-way valve MV2. In all of the four operations replaced from the 18 operations, the 2-3 opening P23 communicates with the 2-2 opening P22. That is, in the second multi-way valve MV2 in which the 18 operations are integrated into four operations, the 2-3 opening P23, which is the cooling water inlet, always communicates with the 2-2 opening P22, which is the cooling water outlet. For this reason, the flow path connecting the 2-3 opening P23 and the 2-2 opening P22 does not need to be switched between open and closed by the second movable disc MD2. This was discovered through the inventors' intensive study.

[0410] In this way, the inventors have found that the second multi-way valve MV2, which is a six-way valve, can be replaced with a sixth multi-way valve MV6, which is a five-way valve and has one fewer cooling water inlet port than the second multi-way valve MV2, in the fluid circuit system 1. Even when the second multi-way valve MV2 is replaced with the sixth multi-way valve MV6, the fluid circuit system 1 of this embodiment is capable of handling all of the operation modes that the temperature adjustment device of the second embodiment can perform.

[0411] A specific configuration of the sixth multi-way valve MV6 capable of executing the four operations replaced from the 18 operations of the second multi-way valve MV2 will be described.

[0412] The sixth multi-way valve MV6 has three cooling water inlets and two cooling water outlets, as shown in Fig. 65. In this embodiment, the three cooling water inlets formed in the sixth multi-way valve MV6 are called a 6-1 opening P61, a 6-3 opening P63, and a 6-4 opening P64, and the two cooling water outlets formed in the sixth multi-way valve MV6 are called a 6-2 opening P62 and a 6-5 opening P65.

[0413] The sixth multi-way valve MV6 has a sixth fixed disk FD6, which will be described later, having a 6-1 flow hole FD61 that can communicate with the 6-1 opening P61, a 6-2 flow hole FD62 that can communicate with the 6-2 opening P62, a 6-3 flow hole FD63 that can communicate with the 6-3 opening P63, and a 6-5 flow hole FD65 that can communicate with the 6-5 opening P65. The sixth multi-way valve MV6 also has a sixth movable disk MD6, which is shown in FIG. 67 and which rotates while sliding on the sixth fixed disk FD6. The sixth movable disk MD6 has a sixth through hole MD61 and two sixth communication holes MD62 that communicate with the 6-1 flow hole FD61, the 6-2 flow hole FD62, and the 6-5 flow hole FD65. Hereinafter, of the two sixth communication holes MD62, one will be referred to as one-side sixth communication hole MD621, and the other will be referred to as other-side sixth communication hole MD622.

[0414] The 6-1 flow hole FD61, the 6-2 flow hole FD62, and the 6-5 flow hole FD65 formed in the sixth fixed disk FD6 can be opened and closed depending on the rotational position of the sixth movable disk MD6. In contrast, the 6-3 flow hole FD63 formed in the sixth fixed disk FD6 cannot be opened and closed by the sixth movable disk MD6, and is always in communication with the 6-3 opening P63. The 6-3 flow hole FD63 also communicates with the 6-2 opening P62 and the 6-5 opening P65. In other words, the 6-3 opening P63, which is the cooling water inlet, is configured to have a constant communication structure in which it is always in communication with the 6-2 opening P62 and the 6-5 opening P65, which are the cooling water outlets.

[0415] The sixth multi-way valve MV6 is provided above the sixth movable disc MD6 and the sixth fixed disc FD6 in the upward direction DRa2, and a 6-4 opening P64 is formed in a port (not shown) that introduces cooling water into the sixth multi-way valve MV6.

[0416] The sixth multi-way valve MV6 of this embodiment can switch the destination of the cooling water flowing in from the 6-1 opening P61 and the 6-4 opening P64 to the 6-2 opening P62 and the 6-5 opening P65 according to the operation mode of the temperature adjustment device. Then, by switching the destination of the cooling water flowing in from the 6-1 opening P61 and the 6-4 opening P64 to the 6-2 opening P62 and the 6-5 opening P65, four operations can be performed that are replaced from the 18 operations of the second multi-way valve MV2. Hereinafter, the four operations performed by the sixth multi-way valve MV6 are also referred to as the first operation, the second operation, the third operation, and the fourth operation. The first operation, the second operation, the third operation, and the fourth operation correspond to the above-mentioned first group operation, the second group operation, the third group operation, and the fourth group operation.

[0417] The relative position of the sixth movable disc MD6 with respect to the sixth fixed disc FD6 when the sixth multi-way valve MV6 performs the first to fourth operations will be described with reference to FIGS.

[0418] First, the first operation will be described. When the sixth multi-way valve MV6 performs the first operation, the sixth movable disc MD6 is positioned at a rotational position shown in Fig. 68. Specifically, when the sixth multi-way valve MV6 performs the first operation, the sixth movable disc MD6 is positioned at a position where the sixth through hole MD61 communicates with the 6-5 communication hole FD65. In addition, the sixth movable disc MD6 is positioned at a position where the one-side sixth communication hole MD621 communicates with the 6-5 communication hole FD65, and the other-side sixth communication hole MD622 communicates with the 6-1 communication hole FD61 and the 6-2 communication hole FD62.

[0419] As a result, the 6-4 opening P64 communicates with the 6-5 opening P65 via the 6th through hole MD61 and the 6-5 communication hole FD65. The 6-1 opening P61 communicates with the 6-2 opening P62 via the 6-1 communication hole FD61, the other-side 6th communication hole MD622, and the 6-2 communication hole FD62. The 6-3 opening P63 always communicates with the 6-2 opening P62 and the 6-5 opening P65, as described above.

[0420] Next, the second operation will be described. When the sixth multi-way valve MV6 performs the second operation, the sixth movable disc MD6 is positioned at a rotational position shown in Fig. 69. Specifically, when the sixth multi-way valve MV6 performs the second operation, the sixth movable disc MD6 is positioned at a position where the sixth through hole MD61 communicates with the 6-2 communication hole FD62. Moreover, the sixth movable disc MD6 is positioned at a position where the one-side sixth communication hole MD621 communicates with the 6-2 communication hole FD62, and at a position where the other-side sixth communication hole MD622 communicates with the 6-5 communication hole FD65.

[0421] As a result, the 6-4 opening P64 communicates with the 6-2 opening P62 via the 6th through hole MD61 and the 6-2 flow hole FD62. Also, the 6-3 opening P63 always communicates with the 6-2 opening P62 and the 6-5 opening P65, as described above. And the 6-1 opening P61 is closed.

[0422] Next, the third operation will be described. When the sixth multi-way valve MV6 performs the third operation, the sixth movable disc MD6 is positioned at a rotational position shown in Fig. 70. Specifically, when the sixth multi-way valve MV6 performs the third operation, the sixth movable disc MD6 is positioned at a position where the sixth through hole MD61 communicates with the sixth-2 communication hole FD62. In addition, the sixth movable disc MD6 is positioned at a position where the one-side sixth communication hole MD621 communicates with the sixth-5 communication hole FD65, and is positioned at a position where the other-side sixth communication hole MD622 communicates with the sixth-2 communication hole FD62.

[0423] As a result, the 6-4 opening P64 communicates with the 6-2 opening P62 via the 6th through hole MD61 and the 6-2 flow hole FD62. Also, the 6-3 opening P63 always communicates with the 6-2 opening P62 and the 6-5 opening P65, as described above. And the 6-1 opening P61 is closed.

[0424] Next, the fourth operation will be described. When the sixth multi-way valve MV6 performs the fourth operation, the sixth movable disc MD6 is positioned at the rotational position shown in Fig. 71. Specifically, when the sixth multi-way valve MV6 performs the fourth operation, the sixth movable disc MD6 is positioned at a position where the sixth through hole MD61 communicates with the 6-5 communication hole FD65. In addition, the sixth movable disc MD6 is positioned at a position where the one-side sixth communication hole MD621 communicates with the 6-2 communication hole FD62, and is positioned at a position where the other-side sixth communication hole MD622 communicates with the 6-5 communication hole FD65.

[0425] As a result, the 6-4 opening P64 communicates with the 6-5 opening P65 via the 6th through hole MD61 and the 6-5 flow hole FD65. Also, the 6-3 opening P63 always communicates with the 6-2 opening P62 and the 6-5 opening P65, as described above. And the 6-1 opening P61 is closed.

[0426] The sixth multi-way valve MV6 capable of executing these four operations can accommodate all 18 operations described in the second embodiment. Moreover, when the temperature adjustment device executes each of the 2-1 mode, 2-2 mode, 2-3 mode, and 2-4 mode described in the second embodiment, the sixth multi-way valve MV6 can accommodate these four operation modes by executing the first operation.

[0427] For example, the flow of cooling water flowing through the fluid circuit system 1 of this embodiment when the temperature adjustment device executes the 2-1 mode described in the second embodiment will be described. In the 2-1 mode, the rotational positions of the first movable disc MD1 of the first multi-way valve MV1, the third movable disc MD3 of the third multi-way valve MV3, the fourth movable disc MD4 of the fourth multi-way valve MV4, and the fifth fixed disc FD5 of the fifth multi-way valve MV5 are the same as those described in the second embodiment. Therefore, the description of the operation of the first multi-way valve MV1, the third multi-way valve MV3, the fourth multi-way valve MV4, and the fifth multi-way valve MV5 will be omitted.

[0428] When the operation mode of the temperature adjustment device is set to the 2-1 mode, the sixth movable disc MD6 executes the first operation. As a result, the 6-4 opening P64 communicates with the 6-5 opening P65 via the sixth through hole MD61 and the 6-5 communication hole FD65. Also, the 6-1 opening P61 communicates with the 6-2 opening P62 via the 6-1 communication hole FD61, the other-side sixth communication hole MD622, and the 6-2 communication hole FD62.

[0429] The flow of the cooling water in the fluid circuit FC when the open / closed states of the cooling water inlet and the cooling water outlet of the sixth multi-way valve MV6 are set in this manner will be described.

[0430] As described above, in the 2-1 mode, the fluid circuit system 1 communicates the 6-1 opening P61 of the sixth multi-way valve MV6 with the 6-2 opening P62.

[0431] As a result, the fluid circuit system 1 can circulate the cooling water in the fluid circuit FC by operating the first pump P1 and the second pump P2. The fluid circuit system 1 can then guide the cooling water to the battery BT and the chiller CH. The fluid circuit system 1 can also circulate the cooling water in the fluid circuit FC by operating the fourth pump P4. The fluid circuit system 1 can then guide the cooling water to the radiator LT and the driving heat generating part PT.

[0432] However, in the fluid circuit system 1 of this embodiment, the 6-3 opening P63, which is an undesired inlet of the sixth multi-way valve MV6, is connected to the 6-2 opening P62 and the 6-5 opening P65, which is an undesired outlet. Furthermore, the fluid circuit system 1 connects the 6-4 opening P64, which is an undesired inlet of the sixth multi-way valve MV6, to the 6-5 opening P65, which is an undesired outlet. In this case, there is a risk that the cooling water pumped by the third pump P3 passes through the first multi-way valve MV1 and the second multi-way valve MV2 and flows into the electric heater EH, the water-cooled condenser WC, and the heater core HC, which do not require the flow of cooling water.

[0433] In contrast, in the fluid circuit system 1 of the present embodiment, in the 2-1 mode, the 1-3 opening P13 of the first multi-way valve MV1 connected to the refrigerant flow downstream side of the fluid circuit FC in which the electric heater EH, the water-cooled condenser WC, and the heater core HC are arranged is closed. In addition, in the fluid circuit system 1, in the 2-1 mode, the 1-4 opening P14 of the first multi-way valve MV1 connected to the refrigerant flow upstream side of the fluid circuit FC in which the electric heater EH and the heater core HC are arranged is closed. This makes it possible to prevent the cooling water pumped by the third pump P3 from flowing through the fluid circuit FC to the electric heater EH, the water-cooled condenser WC, and the heater core HC. In other words, the fluid circuit system 1 can prohibit the flow of the cooling water that may pass through the unnecessary inlet and the unnecessary outlet that are opened in the sixth multi-way valve MV6, by the first multi-way valve MV1 different from the sixth multi-way valve MV6.

[0434] According to this, compared to the second embodiment, the second multi-way valve MV2, which is a six-way valve, can be replaced with the sixth multi-way valve MV6, which is a five-way valve. Therefore, it is possible to adopt the sixth multi-way valve MV6, which has a simpler structure than the second multi-way valve MV2. Furthermore, by replacing the second multi-way valve MV2, which is a six-way valve, with the sixth multi-way valve MV6, which is a five-way valve, the number of flow paths in the fluid circuit FC to which they are connected can be reduced. Therefore, the manufacturing cost of the fluid circuit system 1 can be reduced.

[0435] Moreover, the sixth multi-way valve MV6 can respond to the 18 operations of the second multi-way valve MV2 by executing the first to fourth operations. Therefore, the power consumption of the sixth multi-way valve MV6 can be reduced compared to the power consumption of the second multi-way valve MV2 of the second embodiment in which the second movable disc MD2 is rotated every 18 operations. Therefore, the running costs of the entire fluid circuit system 1 can be reduced.

[0436] The sixth multi-way valve MV6 also has a 6-3 opening P63 that always communicates with the 6-2 opening P62 and the 6-5 opening P65. Therefore, the opening area of ​​the 6-3 opening P63, through which the cooling water always flows, does not change depending on the rotational position of the sixth movable disc MD6. In other words, the 6-3 opening P63 is always fully open regardless of the operating mode of the temperature adjustment device, and the opening area does not become smaller depending on the rotational position of the sixth movable disc MD6.

[0437] Therefore, compared to a configuration in which the opening area changes according to the rotational position of the sixth movable disc MD6, it is possible to suppress the pressure loss that occurs when passing through the 6-3 opening P63. Therefore, it is possible to reduce the capacities of the first pump P1, the second pump P2, the third pump P3, and the fourth pump P4. Therefore, it is possible to suppress the initial cost of the entire fluid circuit system 1.

[0438] (Fourth embodiment) Next, a fourth embodiment will be described with reference to Figs. 72 to 105. This embodiment differs from the first embodiment in that the fluid circuit FC is different from the first embodiment, and the first multi-way valve MV1 is eliminated and the second multi-way valve MV2 is replaced with a fluid control valve RV. The rest is the same as the first embodiment. Therefore, in this embodiment, the parts that differ from the first embodiment will be mainly described, and the description of the parts that are the same as the first embodiment may be omitted.

[0439] First, the fluid circuit FC of this embodiment will be described with reference to Fig. 72. The fluid circuit system 1 of this embodiment has a fluid control valve RV and a third multi-way valve MV3 as valve devices that switch the fluid circuit FC. As shown in Fig. 72, the fluid control valve RV is a valve device having a multi-way valve structure with four cooling water inlets and six cooling water outlets.

[0440] Hereinafter, the four cooling water inlets formed in the fluid control valve RV are referred to as the first opening RP1, the fourth opening RP4, the eighth opening RP8, and the tenth opening RP10. Also, the six cooling water outlets formed in the fluid control valve RV are referred to as the second opening RP2, the third opening RP3, the fifth opening RP5, the sixth opening RP6, the seventh opening RP7, and the ninth opening RP9. In the fluid control valve RV shown as a decagon in FIG. 72, the ten vertices of the decagon represent the first opening RP1, the second opening RP2, the third opening RP3, the fourth opening RP4, the fifth opening RP5, the sixth opening RP6, the seventh opening RP7, the eighth opening RP8, the ninth opening RP9, and the tenth opening RP10 of the fluid control valve RV.

[0441] In the fluid control valve RV, the cooling water outlet of the second connection part CV2 is connected to the first opening RP1, one cooling water inlet of the second connection part CV2 is connected to the second opening RP2, and one cooling water inlet of the third connection part CV3 is connected to the third opening RP3. In addition, in the fluid control valve RV, the cooling water outlet of the first connection part CV1 is connected to the fourth opening RP4, one cooling water inlet of the first connection part CV1 is connected to the fifth opening RP5, and the 3-3 opening P33 of the third multi-way valve MV3 is connected to the sixth opening RP6. In addition, in the fluid control valve RV, the eighth opening RP8 is connected to the seventh opening RP7, the seventh opening RP7 is connected to the eighth opening RP8, the tenth opening RP10 is connected to the ninth opening RP9, and the ninth opening RP9 is connected to the tenth opening RP10.

[0442] In the third multi-way valve MV3, the cooling water outlet of the third connection part CV3 is connected to the 3-1 opening P31, the other cooling water inlet of the first connection part CV1 is connected to the 3-2 opening P32, and the sixth opening RP6 of the fluid control valve RV is connected to the 3-3 opening P33. Also, in the third multi-way valve MV3, the other cooling water inlet of the third connection part CV3 is connected to the 3-4 opening P34, and the other cooling water inlet of the second connection part CV2 is connected to the 3-5 opening P35.

[0443] Hereinafter, the flow path connecting the first opening RP1 of the fluid control valve RV and the cooling water outlet of the second connection part CV2 is called the CV2-RP1 flow path FC13. The flow path connecting the second opening RP2 of the fluid control valve RV and one of the cooling water inlets of the second connection part CV2 is called the RP2-CV2 flow path FC14. In addition, the flow path connecting the third opening RP3 of the fluid control valve RV and one of the cooling water inlets of the third connection part CV3 is called the RP3-CV3 flow path FC15. The flow path connecting the fourth opening RP4 of the fluid control valve RV and the cooling water outlet of the first connection part CV1 is called the CV1-RP4 flow path FC16. The flow path connecting the fifth opening RP5 of the fluid control valve RV and one of the cooling water inlets of the first connection part CV1 is called the RP5-CV1 flow path FC17. The flow path connecting the sixth opening RP6 of the fluid control valve RV and the 3-3 opening P33 of the third multi-way valve MV3 is called the RP6-P33 flow path FC18. The flow path connecting the seventh opening RP7 and the eighth opening RP8 of the fluid control valve RV is called an RP7-RP8 flow path FC19. The flow path connecting the ninth opening RP9 and the tenth opening RP10 of the fluid control valve RV is called an RP9-RP10 flow path FC20.

[0444] The flow path connecting the 3-2 opening P32 of the third multi-way valve MV3 and the other cooling water inlet of the first connection part CV1 is called the P32-CV1 flow path FC21. The flow path connecting the 3-1 opening P31 of the third multi-way valve MV3 and the cooling water outlet of the third connection part CV3 is called the P31-CV3 flow path FC22. The flow path connecting the 3-4 opening P34 of the third multi-way valve MV3 and the other cooling water inlet of the third connection part CV3 is called the P34-CV3 flow path FC23. The flow path connecting the 3-5 opening P35 of the third multi-way valve MV3 and the other cooling water inlet of the second connection part CV2 is called the P35-CV2 flow path FC24.

[0445] The CV2-RP1 flow path FC13 is provided with a radiator LT. The CV1-RP4 flow path FC16 is provided with a second pump P2 and a battery BT. The RP7-RP8 flow path FC19 is provided with a chiller CH. The RP9-RP10 flow path FC20 is provided with a first pump P1 and a driving heat generating unit PT. The P31-CV3 flow path FC22 is provided with a third pump P3 and a water-cooled condenser WC. The P34-CV3 flow path FC23 is provided with a heater core HC.

[0446] Here, the fluid control valve RV is configured to be able to change the destination of the cooling water flowing into it by connecting its own cooling water inlet to its own cooling water outlet, and by changing the destination of the cooling water, the fluid control valve RV can switch the flow path through which the cooling water flows in the fluid circuit FC.

[0447] Next, the fluid control valve RV will be described with reference to Figures 73 to 80. As shown in Figures 73 to 80, the fluid control valve RV of this embodiment includes a main body R10, a main body cover R20, a power unit R30, a valve R40, a seal unit R50, and a biasing unit R60. The fluid control valve RV of this embodiment is configured as a rotary valve device in which the power unit R30 rotates the valve R40 about a valve axis VC described below, thereby switching the fluid circuit FC.

[0448] As shown in Figs. 73 to 75, the main body R10 is a housing that constitutes the outer shell of the fluid control valve RV and forms a valve accommodating space S that accommodates the valve R40 inside. The main body R10 is a non-rotating member that does not rotate. Specifically, the main body R10 has a tubular portion R11 formed in a bottomed tubular shape, a bottom portion R12 that forms the bottom side of the bottomed tubular shape, and a port forming portion R13 that allows the fluid to flow in and out of the valve accommodating space S. The tubular portion R11, the bottom portion R12, and the port forming portion R13 are molded, for example, by injection molding in which a resin material is poured into a mold and hardened into a desired shape. Note that the power portion R30 is omitted in Figs. 74 and 75.

[0449] 74, a valve R40 and a seal portion R50 are accommodated in a valve accommodating space S inside the main body R10. The opening side of the tubular portion R11 of the main body R10 is closed by a main body cover R20.

[0450] Hereinafter, as shown in Fig. 74 etc., the direction along the valve axis VC is referred to as the valve axial direction DR1. One side of the valve axial direction DR1 is referred to as the first valve axial direction DR1a, and the opposite direction to the first valve axial direction DR1a is referred to as the second valve axial direction DR1b, and various configurations etc. will be described. In this embodiment, the opening side of the tubular portion R11 is referred to as the first valve axial direction DR1a, and the bottom portion R12 side of the main body R10 is referred to as the second valve axial direction DR1b.

[0451] In addition, the various configurations and the like will be described with the direction perpendicular to the valve axial direction DR1 and radially extending from the valve axis VC as the valve radial direction DR2, and the direction around the valve axis VC centered on the valve axis VC as the valve circumferential direction DR3. The valve circumferential direction DR3 is the direction in which the valve R40 rotates due to the driving force supplied from the power unit R30. One side of the valve circumferential direction DR3 is the first valve circumferential direction DR3a, and the other side is the second valve circumferential direction DR3b. Note that the directions shown in FIG. 74 and the like are merely examples and do not limit the installation state of the fluid control valve RV of the present disclosure.

[0452] The tubular portion R11 is a portion that surrounds most of the valve R40 and is formed in a cylindrical shape. The tubular portion R11 is formed so that its central axis is coaxial with the valve axis VC. The tubular portion R11 is formed in a substantially conical shape whose outer diameter and inner diameter become smaller from the first valve axial direction DR1a to the second valve axial direction DR1b. That is, the tubular portion R11 is formed in a substantially conical shape whose apex is on the second valve axial direction DR1b side and whose bottom is on the first valve axial direction DR1a side.

[0453] 76, a circumferential seal regulating portion R111 that regulates movement of the seal portion R50 in the valve circumferential direction DR3 is provided on the inside of the cylindrical portion R11. The circumferential seal regulating portion R111 regulates movement of the seal portion R50 in the valve circumferential direction DR3 accompanying the rotation of the valve R40 when the valve R40 rotates in the valve circumferential direction DR3. The circumferential seal regulating portion R111 is formed to protrude toward the valve axis VC at positions corresponding to the end of the seal portion R50 on the first valve circumferential direction DR3a side and the end of the seal portion R50 on the second valve circumferential direction DR3b side.

[0454] 74 to 76, the cylindrical portion R11 is formed with ten notches R112 communicating with the first opening RP1 to the tenth opening RP10. The ten notches R112 are formed penetrating the cylindrical portion R11 in the valve radial direction DR2 at a portion of the cylindrical portion R11 where the port forming portion R13 is provided. The ten notches R112 are formed in a lattice pattern with five aligned in the valve axial direction DR1 and two rows aligned in the valve circumferential direction DR3.

[0455] The bottom portion R12 closes a portion of the valve accommodating space S and supports a rotating shaft R41 (described later) of the valve R40. As shown in Fig. 76, the bottom portion R12 has a support hole R121 into which the second valve axial direction DR1b side of the rotating shaft R41 of the valve R40 is fitted. The support hole R121 rotatably supports the rotating shaft R41.

[0456] The bottom R12 is provided with two rotation restricting portions R122 that restrict the rotation of the valve R40. The rotation restricting portions R122 are formed at positions that allow them to come into contact with stoppers R43 of the valve R40, which will be described later. When the valve R40 rotates in the first valve circumferential direction DR3a, the stoppers R43 of the valve R40 come into contact with one of the rotation restricting portions R122, thereby restricting the rotation of the valve R40 in the first valve circumferential direction DR3a. When the valve R40 rotates in the second valve circumferential direction DR3b, the stoppers R43 of the valve R40 come into contact with the other rotation restricting portion R122, thereby restricting the rotation of the valve R40 in the second valve circumferential direction DR3b.

[0457] Furthermore, the bottom portion R12 is provided with a radial seal regulating portion R123 that regulates movement of the seal portion R50 in the valve circumferential direction DR3 and the valve radial direction DR2. When the valve R40 rotates in the valve circumferential direction DR3, the radial seal regulating portion R123 regulates the seal portion R50 from moving in the valve circumferential direction DR3 in conjunction with the rotation of the valve R40, and also regulates the seal portion R50 from moving inward in the valve radial direction DR2. The radial seal regulating portion R123 is formed in a groove shape recessed along the valve circumferential direction DR3 from one radial seal regulating portion R111 to the other radial seal regulating portion R111.

[0458] The port forming portion R13 is a region where the first opening RP1 to the tenth opening RP10 are formed. The port forming portion R13 has a rectangular parallelepiped shape, and the valve axial direction DR1 is formed in the longitudinal direction. The first opening RP1 to the tenth opening RP10 are formed in the port forming portion R13 so as to penetrate the port forming portion R13 in the valve radial direction DR2.

[0459] The ninth opening RP9, the eighth opening RP8, the sixth opening RP6, the tenth opening RP10, and the second opening RP2 are arranged in this order from the first-valve axial direction DR1a to the second-valve axial direction DR1b on the first-valve circumferential direction DR3a side. Also, the fifth opening RP5, the first opening RP1, the third opening RP3, the seventh opening RP7, and the fourth opening RP4 are arranged in this order from the first-valve axial direction DR1a to the second-valve axial direction DR1b on the second-valve circumferential direction DR3b side.

[0460] Hereinafter, a group of openings consisting of the ninth opening RP9, the eighth opening RP8, the sixth opening RP6, the tenth opening RP10, and the second opening RP2 may be referred to as the first row openings. A group of openings consisting of the fifth opening RP5, the first opening RP1, the third opening RP3, the seventh opening RP7, and the fourth opening RP4 may be referred to as the second row openings. A group of openings consisting of the ninth opening RP9 and the fifth opening RP5 may be referred to as the first stage openings, and a group of openings consisting of the eighth opening RP8 and the first opening RP1 may be referred to as the second stage openings. A group of openings consisting of the sixth opening RP6 and the third opening RP3 may be referred to as the third stage openings, and a group of openings consisting of the tenth opening RP10 and the seventh opening RP7 may be referred to as the fourth stage openings. A group of openings consisting of the second opening RP2 and the fourth opening RP4 may be referred to as the fifth stage openings. The arrangement of the first opening RP1 to the tenth opening RP10 is not limited to this example and can be changed as appropriate.

[0461] The body cover R20 closes the valve accommodating space S by closing the opening side of the cylindrical portion R11 in the body R10, and supports the rotating shaft R41 of the valve R40. The body cover R20 has a bearing portion R21 that supports the first valve axial direction DR1a side of the rotating shaft R41 of the valve R40, and a ring-shaped cover seal R23 that seals the gap between the rotating shaft R41 and the shaft hole R22 in the body cover R20 into which the rotating shaft R41 is inserted. Furthermore, the body cover R20 is provided with a drive unit seal R24 that seals the gap between the power unit R30 and a portion of the body cover R20 into which the power unit R30 is inserted.

[0462] The bearing portion R21 is, for example, a ball bearing or a rolling bearing, and rotatably supports the rotating shaft R41. The cover seal R23 is, for example, an O-ring made of an elastically deformable rubber member. The cover seal R23 ensures sealing between the main body cover R20 and the rotating shaft R41. The drive unit seal R24 is, for example, an O-ring made of an elastically deformable rubber member. The drive unit seal R24 ensures sealing between the main body cover R20 and the power unit R30.

[0463] The body cover R20 is fixed to the cylindrical portion R11 by snap fitting, and the drive portion M20 is fixed to the body cover R20 by a screw member.

[0464] The power unit R30 is an actuator for outputting a rotational force for rotating the valve R40. The power unit R30 has a motor (not shown) as a drive source for rotating the valve R40, and a speed reduction mechanism (not shown) for transmitting the output of the motor to the rotating shaft R41 of the valve R40. For example, a servo motor, a stepping motor, or a brushless motor can be used as the motor. For example, a gear mechanism including a helical gear or a spur gear can be used as the speed reduction mechanism. The motor rotates according to a control signal from a control device 10 electrically connected to the motor.

[0465] The valve R40 is a valve member that switches the flow of fluid to each of the first opening RP1 to the tenth opening RP10 by rotating about the valve axis VC by the torque output by the power unit R30. As shown in FIG. 74, the valve R40 is disposed in the valve accommodating space S and is provided at a position that does not contact the inner circumferential surface of the cylindrical portion R11 so as to be rotatable. That is, the valve R40 is disposed so that a predetermined gap is formed between the valve R40 and the cylindrical portion R11. The valve R40 is formed so that the central axis is coaxial with the valve axis VC and also coaxial with the central axis of the cylindrical portion R11.

[0466] The valve R40 is formed in a generally conical shape whose outer diameter decreases from the first valve axial direction DR1a to the second valve axial direction DR1b. That is, the valve R40 is formed in a generally conical shape whose apex is on the second valve axial direction DR1b side and whose bottom is on the first valve axial direction DR1a side.

[0467] As shown in Figures 74 and 77, the valve R40 has a rotating shaft R41, a valve outer wall portion R42 that forms a substantially conical outer shell, and a stopper R43. The valve outer wall portion R42, the rotating shaft R41, and the stopper R43 are integrally molded.

[0468] The valve outer wall portion R42 has a conical shape that conforms to the cylindrical portion R11. That is, the outer peripheral surface of the valve outer wall portion R42 and the inner peripheral surface of the cylindrical portion R11 are substantially parallel to each other at portions that face each other, and the distance in the valve radial direction DR2 between the outer peripheral surface of the valve outer wall portion R42 and the inner peripheral surface of the cylindrical portion R11 is substantially constant.

[0469] 77 to 80, six fluid passages R44a, R44b, R44c, R44d, R44e, and R44f corresponding to the first opening RP1 to the tenth opening RP10 are formed in the valve outer wall portion R42. The six fluid passages R44a, R44b, R44c, R44d, R44e, and R44f are flow paths through which the cooling water flows in from the first opening RP1, the fourth opening RP4, the eighth opening RP8, and the tenth opening RP10.

[0470] Furthermore, seven blocking portions R45a, R45b, R45c, R45d, R45e, R45f, and R45g that prohibit fluid from flowing into the valve accommodating space S are formed in the valve outer wall portion R42. Hereinafter, the six fluid passages R44a, R44b, R44c, R44d, R44e, and R44f are also referred to as six fluid passages R44a to R44f. In addition, the seven blocking portions R45a, R45b, R45c, R45d, R45e, R45f, and R45g are also referred to as seven blocking portions R45a to R45g.

[0471] These six fluid passages R44a-R44f and seven blocking portions R45a-R45g are formed so that when the valve R40 rotates, any one of them faces any one of the first opening RP1 to the tenth opening RP10. Also, on the valve outer wall portion R42, ribs R46 are formed to separate each of these six fluid passages R44a-R44f and seven blocking portions R45a-R45g.

[0472] These six fluid passages R44a-R44f switch the inflow and outflow of the fluid to and from the fluid control valve RV by rotating the valve R40 to switch the openings they face among the first opening RP1 to the tenth opening RP10. Moreover, these seven blocking portions R45a-R45g prohibit the inflow and outflow of the fluid to the openings they face by rotating the valve R40 to switch the openings they face among the first opening RP1 to the tenth opening RP10. The rib R46 is formed to surround each of these six fluid passages R44a-R44f and the seven blocking portions R45a-R45g.

[0473] Hereinafter, the six fluid passages R44a to R44f will be referred to as the first fluid passage R44a, the second fluid passage R44b, the third fluid passage R44c, the fourth fluid passage R44d, the fifth fluid passage R44e, and the sixth fluid passage R44f, respectively. The first fluid passage R44a, the second fluid passage R44b, the third fluid passage R44c, the fourth fluid passage R44d, the fifth fluid passage R44e, and the sixth fluid passage R44f may also be referred to as the first fluid passage R44a to the sixth fluid passage R44f.

[0474] The seven blocking parts R45a to R45g are referred to as the first blocking part R45a, the second blocking part R45b, the third blocking part R45c, the fourth blocking part R45d, the fifth blocking part R45e, the sixth blocking part R45f, and the seventh blocking part R45g. The first blocking part R45a, the second blocking part R45b, the third blocking part R45c, the fourth blocking part R45d, the fifth blocking part R45e, the sixth blocking part R45f, and the seventh blocking part R45g may be referred to as the first blocking part R45a to the seventh blocking part R45g. In the valve R40, any one of the first fluid passage R44a to the sixth fluid passage R44f and any one of the first blocking part R45a to the seventh blocking part R45g face any one of the first opening RP1 to the tenth opening RP10.

[0475] The six fluid passages R44a to 44f are formed in the valve outer wall portion R42 so as to be recessed toward the valve axis VC along at least one of the valve axial direction DR1 and the valve circumferential direction DR3.

[0476] The six fluid passages R44a-44f each have a shape corresponding to the first opening RP1-tenth opening RP10, each of which has a lattice-like opening shape. The first fluid passage R44a-sixth fluid passage R44f are formed to have a size that allows them to span two or more of the first opening RP1-tenth opening RP10 when the valve R40 is rotated and positioned to face the first opening RP1-tenth opening RP10.

[0477] Here, the first fluid passage R44a to the sixth fluid passage R44f are formed so as to be able to communicate at least one of the first opening RP1, the fourth opening RP4, the eighth opening RP8, and the tenth opening RP10, which are cooling water inlets, with at least one of the second opening RP2, the third opening RP3, the fifth opening RP5, the sixth opening RP6, the seventh opening RP7, and the ninth opening RP9, which are cooling water outlets. As a result, the first fluid passage R44a to the sixth fluid passage R44f are able to guide the fluid flowing in from any of the first opening RP1, the fourth opening RP4, the eighth opening RP8, and the tenth opening RP10, which are in communication, to any of the second opening RP2, the third opening RP3, the fifth opening RP5, the sixth opening RP6, the seventh opening RP7, and the ninth opening RP9, which are in communication.

[0478] The first blocking portion R45a to the seventh blocking portion R45g are formed so that, when facing any one of the first opening portion RP1, the fourth opening portion RP4, the eighth opening portion RP8, and the tenth opening portion RP10, they can prevent fluid from passing through the opposing cooling water inlet into the valve accommodating space S. Specifically, the first blocking portion R45a to the seventh blocking portion R45g have opening shapes corresponding to the first opening portion RP1, the fourth opening portion RP4, the eighth opening portion RP8, and the tenth opening portion RP10, respectively, and are formed recessed toward the valve axis VC.

[0479] Furthermore, the first blocking portion R45a to the seventh blocking portion R45g are formed so as to be able to prevent the outflow of fluid from the cooling water outlet when facing any one of the second opening RP2, the third opening RP3, the fifth opening RP5, the sixth opening RP6, the seventh opening RP7, and the ninth opening RP9. Specifically, the first blocking portion R45a to the seventh blocking portion R45g have opening shapes corresponding to the second opening RP2, the third opening RP3, the fifth opening RP5, the sixth opening RP6, the seventh opening RP7, and the ninth opening RP9, respectively, and are formed recessed toward the valve axis VC.

[0480] The first fluid passage R44a to the sixth fluid passage R44f and the first closing portion R45a to the seventh closing portion R45g are each separated by a rib R46. That is, the first fluid passage R44a to the sixth fluid passage R44f and the first closing portion R45a to the seventh closing portion R45g are each surrounded by the rib R46.

[0481] Specific shapes and positions of the first fluid passage R44a to the sixth fluid passage R44f and the first blocking portion R45a to the seventh blocking portion R45g will be described with reference to Fig. 79 and Fig. 80. Fig. 79 shows the valve R40 in a schematic manner, with the portions facing the first opening RP1 to the tenth opening RP10 surrounded by thick lines. Fig. 80 shows the front surface side of the valve R40 when the valve R40 is rotated in the valve circumferential direction DR3 so that the first fluid passage R44a to the sixth fluid passage R44f and the first blocking portion R45a to the seventh blocking portion R45g can be seen. Fig. 80 also shows the portions where the first fluid passage R44a to the sixth fluid passage R44f and the first blocking portion R45a to the seventh blocking portion R45g are formed when the valve R40 is expanded in the valve circumferential direction DR3 by a lattice-shaped mass. The grid shown by solid lines indicates the area where the ribs R46 are formed, and the grid shown by dashed lines indicates the area where the ribs R46 are not formed. In order to make the drawing easier to understand, the...

Claims

1. A fluid circuit system that introduces a fluid to a plurality of connecting devices (WC, CH, HC, LT, PT, BT, EH), a fluid circuit (FC) through which the fluid flows; a plurality of valve devices (MV1, MV2, MV3, MV4, MV5, MV6, RV) that switch the flow of the fluid flowing through the fluid circuit; The plurality of valve devices include inlets (P11, P12, P13, P14, P21, P23, P24, P25, P26, P31, P33, P35, P41, P44, P52, P54, P55, P61, P63, P64, RP1, RP4, RP8, RP10) for introducing the fluid and outlets (P11, P12, P13, P14, P22, P23, P24, P25, P26, P32, P33, P34, P35, P42, P43, P45, P51, P53, P56, P62, P65, RP2, RP3, RP5, the valve member is adapted to switch between directing the fluid to the connected device which requires the fluid to flow and prohibiting the fluid from flowing to the connected device which does not require the fluid to flow, Among the inlets, an inlet connected to the connection device through which the fluid does not need to flow is defined as an unnecessary inlet, and among the outlets, an outlet connected to the connection device through which the fluid does not need to flow is defined as an unnecessary outlet, A fluid circuit system in which the flow of the fluid to the undesired inlet and the undesired outlet of a certain valve device among the plurality of valve devices, which is in an open state, is prohibited by blocking the inlet and the outlet of a valve device other than the certain valve device among the plurality of valve devices.

2. 2. The fluid circuit system according to claim 1, wherein at least one of the waste inlet and the waste outlet is constantly in communication with each other and cannot be closed by the valve member.

3. 3. The fluid circuit system according to claim 1, wherein the plurality of valve devices are any one or a combination of a disk valve device, in which the valve member is rotatable and has a movable disk (DM1, DM2, DM3, DM4, DM5, DM6) in which holes (MD11, MD12, MD21, MD22, MD31, MD32, MD41, MD42, MD51, MD52, MD61, MD62) through which the fluid flows, a rotary valve device, in which the valve member is rotatable and has a cylindrical valve (R40) that opens and closes the inlet and the outlet depending on a rotational position, and a ball valve device, in which the valve member is rotatable and has a spherical valve (B) that opens and closes the inlet and the outlet depending on a rotational position.

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