Control valve

Abstract

A control valve according to an aspect of the present disclosure comprises: a first housing in which a plurality of first openings are formed; a second housing in which a plurality of second openings are formed; and a switching mechanism which performs switching of a circuit that connects between the plurality of first openings and the plurality of second openings. The switching mechanism is provided with: a valve body in which a plurality of passage holes are formed at intervals in a peripheral direction about an axis that is along a first direction, and which rotates about the axis; and a distribution member which is disposed between the valve body and the second housing in the first direction.

Description

Control valve

[0001] This disclosure relates to a control valve. This application claims priority to Japanese Patent Application No. 2024-045733, filed on March 21, 2024, the contents of which are incorporated herein by reference.

[0002] A vehicle is equipped with a cooling system. The cooling system cools a heat-generating part (e.g., an engine or a motor) by using a coolant that circulates between the heat-generating part and a heat-dissipating part (e.g., a radiator or a heater). In this type of cooling system, the flow of the coolant is controlled by a control valve. The control valve is provided in a flow path connecting the heat-generating part and the heat-dissipating part.

[0003] The control valve includes a housing having an inlet port and an outlet port, and a valve disposed within the housing to separate the inlet port from the outlet port (see, for example, Patent Document 1). With this configuration, rotation of the valve brings the inlet port into communication with one of the outlet ports through a flow path opening formed in the valve. This allows coolant flowing into the housing through the inlet port to flow out through one of the outlet ports.

[0004] Japanese Patent No. 7380505

[0005] Recently, in order to reduce the size of cooling systems, there has been a demand for reducing the size of control valves and the number of control valves provided in cooling systems.

[0006] The present disclosure provides a control valve that can reduce the size of the control valve and the number of control valves provided in a cooling system.

[0007] In order to solve the above problems, the present disclosure employs the following aspects: (1) A control valve according to one aspect of the present disclosure includes a first housing having a plurality of first openings formed therein through which a fluid passes, a second housing arranged to face the first housing in a first direction and having a plurality of second openings formed therein through which the fluid passes, and a switching mechanism arranged between the first housing and the second housing in the first direction and for switching circuits connecting the plurality of first openings and the plurality of second openings, wherein the switching mechanism has a plurality of passage holes formed at intervals in a circumferential direction around an axis along the first direction, a valve body that rotates around the axis, and a second housing arranged to switch circuits connecting the plurality of first openings and the plurality of second openings in the first direction. and a distribution member disposed between the valve body and the second housing, wherein the distribution member is provided with a plurality of first circuits formed in a number different from the number of first openings at a position facing the valve body in the first direction so that communication with any of the first openings through any of the through holes can be switched between on and off as the valve body rotates, and a plurality of second circuits formed in a number different from the number of first circuits at a position facing the second housing in the first direction so that at least any of the first circuits are respectively connected, while each second circuit is connected to any of the second openings among the plurality of second openings.

[0008] According to this aspect, the first circuits communicating with the first openings are switched depending on the rotational position of the valve disc. In this case, since the number of first circuits is different from the number of first openings, a flow pattern different from the number of first openings can be selected. Therefore, for example, when the first openings function as inlets and the second openings function as outlets, fluid flows between the first openings and the first circuits, which are connected via the passage holes. The fluid is then supplied to the outside of the control valve via the second circuit and the second opening. In this way, by switching the communication between the first circuits, which are formed in a number different from the number of first openings, and the first openings by rotating the valve disc, as long as there are first openings and second openings equal to the number of flow paths to be temperature-controlled, the switching mechanism can switch between a number of flow patterns different from the number of first openings and second openings. Therefore, compared to cases where piping corresponding to the number of fluid flow patterns is provided outside the control valve or where multiple control valves are provided in the cooling system, a smaller cooling system and a reduced number of control valves can be achieved. Furthermore, for example, when assembling a control valve to a vehicle, the cycle time can be shortened compared to when piping is provided for each flow pattern, which reduces the cost of the cooling system and improves manufacturing efficiency.

[0009] (2) In the control valve according to aspect (1), it is preferable that the number of first circuits is greater than the number of first openings, the number of second circuits is smaller than the number of first circuits, and any of the second circuits among the plurality of second circuits is connected to a plurality of the first circuits. According to this aspect, since the number of first circuits is greater than the number of first openings, a number of flow patterns greater than the number of first openings can be selected. Therefore, by switching communication between the first circuits, which are formed in a number greater than the number of first openings, and the first openings by rotating the valve body, as long as the number of first openings and second openings is equal to the number of flow paths to be temperature-controlled, a number of flow patterns greater than the number of first openings and second openings can be switched by the switching mechanism. Therefore, compared to cases where piping corresponding to the number of fluid flow patterns is provided outside the control valve or where multiple control valves are provided on the cooling system, a smaller cooling system and a reduced number of control valves can be achieved.

[0010] (3) In the control valve according to aspect (2), it is preferable that any one of the second circuits communicates with the first circuits that are positioned opposite each other in a direction intersecting the first direction. According to this aspect, by communicating the first circuits that are positioned opposite each other in a direction intersecting the first direction at a position facing away from the first circuits in the first direction, the degree of circuit flexibility can be improved compared to when multiple first circuits are communicated with each other on the opening surface of the first circuits. This can prevent the size of the distributor from increasing even when multiple circuits corresponding to different flow patterns are provided in the distributor. In this case, for example, by communicating the first circuits that are positioned opposite each other among the multiple first circuits via the second circuit, the control valve can be made smaller than when first circuits distributed in two different directions are communicated with each other.

[0011] (4) In the control valve according to any one of aspects (1) to (3), it is preferable that the valve element can be stopped at a plurality of stop positions with different rotation angles, and the product of the number of the through holes and the number of the stop positions is greater than the total number of the first circuits. According to this aspect, the valve element can be made smaller than when the valve element has the same number of through holes as the first circuits. This allows for further miniaturization of the control valve.

[0012] (5) In the control valve according to any one of aspects (1) to (4), the distributor preferably includes a distributor plate having a first surface on which the first circuit opens and facing the first housing in the first direction, and a second surface on which the second circuit opens and facing the second housing in the first direction. This aspect enables the control valve to be made smaller, particularly in the first direction, than a configuration in which the first circuit and the second circuit are formed by separate members.

[0013] (6) In the control valve according to the above aspect (5), the distributor member preferably has a plurality of connection ports that respectively communicate with the plurality of second circuits and communicate with any of the second openings, and includes an intermediate plate disposed between the distributor plate and the second housing, wherein any of the second openings forms a linear opening that extends linearly in a second direction intersecting the first direction, and any of the connection ports communicate with the linear openings at positions spaced apart in the second direction from the linear openings. According to this aspect, since the intermediate plate is disposed between the distributor plate and the second housing, the second circuit and the connection ports are interposed between the first circuit and the second opening. In this case, the degree of circuit flexibility can be improved compared to when the second circuit of the distributor plate and the second opening of the second housing are directly connected. Furthermore, when connecting the connection port and the second opening, the control valve can be made smaller, particularly in the direction intersecting the second direction when viewed from the first direction, compared to when the second opening is formed in a circular shape that extends in a direction intersecting the first direction, for example.

[0014] (7) In the control valve according to any one of aspects (1) to (6), the valve element preferably includes a disk portion having the through hole formed therein and a protrusion protruding from the disk portion in the first direction, and the distributor preferably includes a pair of stopper walls that face each other in the circumferential direction about the axis and abut against the protrusion to limit rotation of the valve element within a predetermined range. According to this aspect, for example, when the control valve starts to operate, the protrusion can be abutted against one of the stopper walls to set the initial position of the drive unit. This can reduce misalignment between the through hole and the first circuit at each stop position of the valve element, improving the reliability of the control valve.

[0015] According to one aspect of the present disclosure, it is possible to reduce the size of the control valve and the number of control valves provided in the cooling system.

[0016] 11 is a block diagram of a cooling system (two-way independent mode) according to an embodiment. FIG. 12 is a block diagram of a cooling system (drive-source priority cooling mode) according to an embodiment. FIG. 13 is a block diagram of a cooling system (battery priority cooling mode) according to an embodiment. FIG. 14 is a block diagram of a cooling system (combined mode) according to an embodiment. FIG. 15 is a perspective view of a control valve according to an embodiment. FIG. 16 is an exploded perspective view of a control valve according to an embodiment. FIG. 17 is a rear side plan view of a first housing according to an embodiment. FIG. 18 is a front side plan view of a second housing according to an embodiment. FIG. 19 is a rear side plan view of a control valve according to an embodiment. FIG. 19 is a cross-sectional view corresponding to line X-X in FIG. 9. FIG. 19 is a cross-sectional view corresponding to line XI-XI in FIG. 10. FIG. 11 is a front side plan view of a distribution plate according to an embodiment. FIG. 20 is a rear side plan view of a distribution plate according to an embodiment. FIG. 21 is a front side plan view of an intermediate plate and a second housing according to an embodiment. FIG. 22 is an enlarged perspective view showing a state in which the first housing is removed from a control valve according to an embodiment. FIG. 23 is a cross-sectional view corresponding to line XVI-XVI in FIG. 24. FIG. 25 is a circuit diagram of a cooling system (two-way independent mode) according to an embodiment. FIG. 26 is an explanatory diagram of the operation of a cooling system (two-way independent mode) according to an embodiment. FIG. 27 is a circuit diagram of a cooling system (drive-source priority cooling mode) according to an embodiment. FIG. 28 is an explanatory diagram of the operation of a cooling system (drive-source priority cooling mode) according to an embodiment. FIG. 1 is a circuit diagram of a cooling system (battery priority cooling mode) according to an embodiment; FIG. 2 is an explanatory diagram of the operation of the cooling system (battery priority cooling mode) according to an embodiment; FIG. 3 is a circuit diagram of a cooling system (combined mode) according to an embodiment; FIG. 4 is an explanatory diagram of the operation of the cooling system (combined mode) according to an embodiment; and FIG. 5 is a perspective view of a control valve (integrated unit) according to a modified example.

[0017] Next, embodiments of the present disclosure will be described with reference to the drawings. In the embodiments and modified examples described below, corresponding components may be designated by the same reference numerals, and their description may be omitted. In the following description, expressions indicating relative or absolute arrangements, such as "parallel," "orthogonal," "center," and "coaxial," not only strictly refer to such arrangements, but also refer to a state in which the components are relatively displaced by an angle or distance to a degree that allows tolerance or the same function to be obtained. In this embodiment, "facing" does not only refer to a case in which the orthogonal directions (normal directions) of two surfaces are aligned with each other, but also includes a case in which the orthogonal directions intersect with each other.

[0018] [Cooling System 1] Figures 1 to 4 are block diagrams of the cooling system 1. Of Figures 1 to 4, Figure 1 shows the dual independent mode, Figure 2 shows the drive source priority cooling mode, Figure 3 shows the battery priority cooling mode, and Figure 4 shows the combined mode. As shown in Figures 1 to 4, the cooling system 1 is mounted on, for example, an electric vehicle. Electric vehicles include electric vehicles, hybrid vehicles, plug-in hybrid vehicles, fuel cell vehicles, and other vehicles equipped with a motor as a drive source.

[0019] The cooling system 1 includes a battery flow path 2, a drive flow path 3, a radiator flow path 4, and a control valve 5 (EWV). The battery flow path 2 is a circuit to which devices (non-drive devices) are connected that are used not only when the vehicle is powered on but also when the vehicle is powered off (READY OFF). Devices with a relatively low operating temperature range are connected to the battery flow path 2. For example, a first pump 6, a cooling device 7, a heating device 8, and a battery 9 are provided in the battery flow path 2. The first pump 6, the cooling device 7, the heating device 8, and the battery 9 are connected in this order from upstream to downstream on the battery flow path 2.

[0020] The first pump 6 pumps the coolant (fluid) downstream in the battery flow path 2. The first pump 6 is, for example, an electric water pump. The cooling device 7 includes, for example, a chiller. The heating device 8 includes, for example, a condenser, a heater, etc.

[0021] The driving flow path 3 is a circuit to which devices (driving devices) that drive the vehicle are connected, at least when the vehicle is powered on (READY ON). Devices whose operating temperature ranges tend to be relatively high are connected to the driving flow path 3. For example, a second pump 10 and a driving module 11 are provided on the driving flow path 3. The second pump 10 and the driving module 11 are connected on the driving flow path 3 in this order from the upstream side to the downstream side.

[0022] The second pump 10 pumps the coolant toward the downstream side of the drive flow path 3. The second pump 10 is, for example, an electric water pump. The drive module 11 has an electric drive unit including a motor (drive source), an inverter, and a reducer, a converter, a charger, etc.

[0023] A radiator 15 is provided in the radiator flow path 4. The radiator 15 exchanges heat between the coolant flowing inside the radiator 15 and the outside air.

[0024] The control valve 5 functions as a so-called six-way valve. The control valve 5 is connected to the upstream end and downstream end of the battery flow path 2, the upstream end and downstream end of the drive flow path 3, and the upstream end and downstream end of the radiator flow path 4. The control valve 5 switches the flow of coolant among the battery flow path 2, the drive flow path 3, and the radiator flow path 4 in the cooling system 1.

[0025] 1, the control valve 5 makes the battery flow path 2, the drive flow path 3, and the radiator flow path 4 separate closed circuits (double independent mode) when the vehicle is running normally or when it is stopped. Note that normal vehicle operation refers to a state in which the vehicle is running under low load, and the drive module 11 and the battery 9 are operating within their respective optimum temperature ranges. Also, when the vehicle is stopped includes when the power is off or when charging (normal charging, quick charging), etc.

[0026] In the dual independent mode, the first pump 6 is operated in the battery flow path 2, allowing the coolant to circulate between the battery flow paths 2 via the control valve 5. In the dual independent mode, the battery 9 is maintained in an optimum temperature range by heat exchange with the coolant circulating through the battery flow path 2. Furthermore, even in the dual independent mode, the coolant can be cooled by heat exchange with the cooling device 7 and heated by heat exchange with the heating device 8. Therefore, the battery 9 is maintained in an optimum temperature range.

[0027] On the other hand, in the dual independent mode, the coolant can be circulated between the control valve 5 and the drive flow path 3 by operating the second pump 10 in the drive flow path 3. In the dual independent mode, the drive module 11 is maintained in an optimum temperature range by heat exchange with the coolant circulating in the drive flow path 3.

[0028] 2, the control valve 5 closes the drive flow path 3 and the radiator flow path 4 together (drive-source-priority cooling mode) when the vehicle is under high load, for example. Note that a high load on the vehicle refers to a state where the drive module 11 may reach a temperature outside the optimum range, such as during sudden acceleration or deceleration.

[0029] In the drive-source-priority cooling mode, in the battery flow path 2, as in the dual independent mode, the first pump 6 is operated to allow the coolant to circulate between the control valve 5 and the battery flow path 2. Meanwhile, in the drive-source-priority cooling mode, the second pump 10 is operated to allow the coolant to circulate between the drive flow path 3 and the radiator flow path 4 via the control valve 5. In the drive-source-priority cooling mode, a relatively low-temperature coolant that has been heat exchanged (cooled) in the radiator 15 passes through the drive module 11 in the drive flow path 3. This allows the drive module 11 to be cooled effectively.

[0030] As shown in Fig. 3, the control valve 5 closes the battery flow path 2 and the radiator flow path 4 together (battery-priority cooling mode) in situations where the battery 9 may reach a temperature outside the optimum range, such as when the vehicle is running normally or stopped, or when the outside air temperature is high. In the battery-priority cooling mode, the first pump 6 is operated in the battery flow path 2, allowing coolant to circulate between the battery flow path 2 and the radiator flow path 4 via the control valve 5. In the battery-priority cooling mode, a relatively low-temperature coolant that has been heat-exchanged (cooled) in the radiator 15 passes through the battery 9. This allows the battery 9 to be cooled effectively.

[0031] As shown in Fig. 4, the control valve 5 closes the battery flow path 2 and the drive flow path 3 as a single circuit (combined mode), for example, when the vehicle is running normally or stopped, or when the outside air temperature is low. In the combined mode, the pumps 6 and 10 are operated to allow the coolant to circulate between the battery flow path 2 and the drive flow path 3 via the control valve 5. In the combined mode, for example, the battery 9 is supplied with coolant that has been heated through heat exchange with the heating device 8 and the drive module 11. This allows the battery 9 to be heated effectively.

[0032] In this way, the cooling system 1 of this embodiment switches between the three flow paths 2 to 4 using a single control valve 5. In the cooling system 1, by using the control valve 5 to switch the flow of coolant between the flow paths 2 to 4 depending on the state of the vehicle, it is easy to maintain the various devices connected to the flow paths 2 to 4 at optimal temperatures.

[0033] <Control Valve 5> Fig. 5 is a perspective view of the control valve 5. Fig. 6 is an exploded perspective view of the control valve 5. As shown in Figs. 5 and 6, the control valve 5 includes a casing 21, a valve element 22, a sealing mechanism 23, and a drive unit 24. In the following description, the direction along the central axis O1 of the valve element 22 will be simply referred to as the axial direction (first direction). In the axial direction, the side facing the drive unit 24 (first side) will be referred to as the front side, and the side opposite the drive unit 24 (second side) will be referred to as the back side. In addition, the direction intersecting the central axis O1 as viewed from the axial direction will be referred to as the radial direction, and the direction around the central axis O1 will be referred to as the circumferential direction.

[0034] <Casing 21> The casing 21 constitutes the exterior of the control valve 5. The casing 21 is disposed coaxially with the central axis O1 and is formed in a cylindrical shape that is flattened in the axial direction. The casing 21 includes a first housing 31, a second housing 32, and a distributor 33.

[0035] <First Housing 31> The first housing 31 is disposed on the front surface side (first axial side) of the distributor 33. The first housing 31 includes a first base 41, a first inlet port 43, a second inlet port 44, a third inlet port 45, and a first connecting piece 46. The first housing 31 is integrally formed from, for example, a synthetic resin material. The first base 41 is formed in a bottomed cylindrical shape that is coaxial with the central axis O1. The first housing 31 is disposed with the opening of the first base 41 facing the back surface side (second axial side).

[0036] Fig. 7 is a plan view of the rear surface side of the first housing 31. As shown in Fig. 7, a through-hole 41b is formed in the radial center of the bottom wall 41a of the first base 41, penetrating the bottom wall 41a in the axial direction.

[0037] A first inlet 41c, a second inlet 41d, and a third inlet 41e are formed in a portion of the bottom wall 41a surrounding the through-hole 41b. Each of the inlets 41c to 41e penetrates the bottom wall 41a in the axial direction. The inlets 41c to 41e are spaced apart in the circumferential direction, for example, at equal intervals. In the illustrated example, the opening areas of the inlets 41c to 41e are all set to be equal. However, the opening areas of the inlets 41c to 41e may be different from one another. Furthermore, the intervals between adjacent inlets 41c to 41e are not limited to being equal. A seal receiving portion 41f is formed in a portion of the bottom wall 41a surrounding each of the inlets 41c to 41e. The seal accommodating portions 41f are annular grooves recessed toward the first axial side relative to the inner surface of the bottom wall 41a and arranged coaxially with the corresponding inlets 41c to 41e.

[0038] As shown in FIG. 5 , the first inlet port 43 connects, for example, the control valve 5 and the downstream end of the battery flow path 2. The first inlet port 43 has an L-shaped tubular shape in an axial cross-section. The first inlet port 43 extends from the opening edge of the first inlet 41c toward the surface and then radially outward. The interior of the first inlet port 43 is connected to the interior of the first base 41 through the first inlet 41c. As shown in FIG. 7 , a radially extending portion of the first inlet port 43 (hereinafter referred to as a first joint 43a) is shifted toward a first side (hereinafter referred to as the +L1 side) with respect to the central axis O1 in a first radial direction L1 and extends toward a first side (hereinafter referred to as the +L2 side) in a second radial direction L2 perpendicular to the first radial direction L1. In a plan view seen from the axial direction, the tip end (+L2 side end) of the first joint 43a protrudes outward from the peripheral wall (hereinafter referred to as the first peripheral wall 41g) of the first base 41. The downstream end of the battery flow path 2 is connected to the first joint 43a.

[0039] As shown in FIG. 5 , the second inlet port 44 connects, for example, the control valve 5 and the downstream end of the drive flow path 3. The second inlet port 44 is formed in an L-shaped tube in an axial cross-sectional view. The second inlet port 44 extends from the opening edge of the second inlet 41d toward the surface and then extends radially outward. The interior of the second inlet port 44 is connected to the interior of the first base 41 through the second inlet 41d. As shown in FIG. 7 , the radially extending portion of the second inlet port 44 (hereinafter referred to as the second joint 44a) extends from a position offset toward the second side (hereinafter referred to as the −L1 side) with respect to the central axis O1 in the first radial direction L1 in a plan view to the second side (hereinafter referred to as the −L2 side) in the second radial direction L2. The tip end (−L2 side end) of the second joint 44a protrudes outward from the first peripheral wall 41g in a plan view. The downstream end of the driving channel 3 is connected to the second joint 44a.

[0040] As shown in FIG. 5 , the third inlet port 45 connects, for example, the control valve 5 and the downstream end of the radiator flow path 4. The third inlet port 45 is formed in an L-shaped tube in an axial cross-sectional view. The third inlet port 45 extends from the opening edge of the third inlet 41e toward the surface and then radially outward. The third inlet port 45 communicates with the interior of the first base 41 through the third inlet 41e. As shown in FIG. 7 , the radially extending portion of the third inlet port 45 (hereinafter referred to as the third joint 45a) is offset toward the +L1 side with respect to the central axis O1 in a plan view and extends toward the −L2 side. The tip end (−L2 end) of the third joint 45a protrudes outward beyond the first peripheral wall 41g in a plan view. The downstream end of the radiator flow path 4 is connected to the third joint 45a.

[0041] The first joint 43a and the third joint 45a extend on the same straight line along the second radial direction L2. The second joint 44a and the third joint 45a extend parallel to the second radial direction L2. That is, the joints 43a to 45a do not protrude in the first radial direction L1 relative to the first base 41 in a plan view. However, the extending direction of the joints 43a to 45a can be changed as appropriate.

[0042] The first connecting piece 46 connects the first housing 31 and the distributor 33 (distributor plate 60, described later). The first connecting piece 46 protrudes radially outward from the first peripheral wall 41g. A plurality of first connecting pieces 46 are provided on the first peripheral wall 41g at intervals in the circumferential direction. A first fastening hole 46a is formed at the radially outer end (tip) of each first connecting piece 46, penetrating the first connecting piece 46 in the axial direction.

[0043] <Second Housing 32> Figure 8 is a plan view of the front surface side of the second housing 32. As shown in Figures 6 and 8, the second housing 32 is disposed on the rear surface side of the distributor 33. The second housing 32 includes a second base 51, a first outlet port 53, a second outlet port 54, a third outlet port 55, a second connecting piece 56, and a base piece 57. The second housing 32 is integrally formed from, for example, a synthetic resin material.

[0044] The second base 51 is formed in a cylindrical shape with a bottom and is arranged coaxially with the central axis O1. The second housing 32 is arranged with the opening of the second base 51 facing the front surface. The outer diameter of the second base 51 is smaller than the outer diameter of the first base 41. However, the outer diameter of the second base may be equal to or greater than the outer diameter of the first base 41. A first outlet 51c, a second outlet 51d, and a third outlet 51e are formed in the bottom wall 51a of the second base 51.

[0045] The first outlet 51c is formed in a portion of the bottom wall 51a on the +L2 side of the central axis O1 and located in the center in the first radial direction L1. In a plan view, the first outlet 51c is positioned offset from the inlets 41c to 41e. The second outlet 51d extends linearly along the first radial direction L1 in the center of the bottom wall 51a in the second radial direction L2 (a portion including the central axis O1). That is, the second outlet 51d is formed as an elongated hole whose longitudinal direction is the first radial direction L1 (radial direction). The third outlet 51e is formed in the bottom wall 51a on the -L2 side of the second outlet 51d. The third outlet 51e extends parallel to the second outlet 51d along the first radial direction L1. In the illustrated example, the length of the third outlet 51e in the first radial direction L1 is shorter than that of the second outlet 51d.

[0046] FIG. 9 is a plan view of the rear side of the control valve 5. FIG. 10 is a cross-sectional view corresponding to line X-X in FIG. 9. As shown in FIGS. 9 and 10, the first outlet port 53 connects, for example, the control valve 5 and the upstream end of the battery flow path 2. The first outlet port 53 is formed in an L-shaped tubular shape in an axial cross-section. The first outlet port 53 extends from the opening edge of the first outlet 51c toward the rear side and then toward the +L2 side (radially outward). The interior of the first outlet port 53 is connected to the interior of the second base 51 through the first outlet 51c. The tip (+L2 side end) of the radially extending portion of the first outlet port 53 (hereinafter referred to as the first joint 53a) protrudes outward beyond the peripheral wall of the second base 51 (hereinafter referred to as the second peripheral wall 51g). The upstream end of the battery flow path 2 is connected to the first joint 53a. In a plan view, the first joint 53 a overlaps a portion of one of the first connecting pieces 46 .

[0047] The second outlet port 54 connects, for example, the control valve 5 and the upstream end of the driving flow path 3. The second outlet port 54 is a tubular member that is L-shaped both in a cross section along the axial direction and in a plan view. Specifically, the second outlet port 54 includes a second lead-out portion 54a and a second joint 54b.

[0048] The second lead-out portion 54a extends from the opening edge of the second outlet 51d toward the rear surface and covers the entire second outlet 51d in the first radial direction L1 from the rear surface. That is, the second outlet port 54 is connected to the second outlet 51d through the second lead-out portion 54a. The second joint 54b extends from the -L1 side end of the second lead-out portion 54a toward the -L2 side (outside). The tip end (-L2 side end) of the second joint 54b protrudes outward beyond the second circumferential wall 51g in plan view. The tip end of the second joint 54b is connected to the upstream end of the driving flow path 3. In the illustrated example, the second joint 54b overlaps a portion of one of the second connecting pieces 56 in plan view.

[0049] The third outflow port 55 connects, for example, the control valve 5 and the upstream end of the radiator flow path 4. The third outflow port 55 is formed in a tubular shape that is L-shaped in a cross section along the axial direction and T-shaped in a plan view of the rear surface side. Specifically, the third outflow port 55 includes a third lead-out portion 55a and a third joint 55b.

[0050] The third lead-out portion 55a extends from the opening edge of the third outlet 51e toward the rear surface, and covers the entire third outlet 51e in the first radial direction L1 from the rear surface side. The third joint 55b extends from the +L1 side end of the third lead-out portion 55a toward the -L2 side. The tip end (-L2 side end) of the third joint 55b protrudes outward beyond the second circumferential wall 51g in plan view. The downstream end of the radiator flow path 4 is connected to the third joint 55b. In plan view, the third joint 55b overlaps a portion of one of the first connecting pieces 46.

[0051] As shown in FIG. 9 , the second connecting piece 56 connects the second housing 32 and the distributor 33. The second connecting piece 56 protrudes radially outward from the second peripheral wall 51g. A plurality of second connecting pieces 56 are provided at intervals in the circumferential direction. A second fastening hole 56a is formed at the radially outer end (tip) of each second connecting piece 56, penetrating the second connecting piece 56 in the axial direction.

[0052] Each second connecting piece 56 is provided at a position where it does not overlap with each first connecting piece 46 in a plan view. In the illustrated example, each second connecting piece 56 is disposed one by one between adjacent first connecting pieces 46 in the circumferential direction. The amount by which the second connecting piece 56 protrudes radially from the second peripheral wall 51g is greater than the amount by which the first connecting piece 46 protrudes radially from the first peripheral wall 41g. However, the position, shape, etc. of each connecting piece 46, 56 can be changed as appropriate.

[0053] The base piece 57 is used to fix the control valve 5 to the vehicle body. The base piece 57 protrudes radially outward from a position on the second peripheral wall 51g that is offset in the circumferential direction from each of the second connecting pieces 56. The base piece 57 is attached to the vehicle body via a mount portion 58. The base piece 57 is made of a rubber material or the like. In the illustrated example, the mount portion 58 is disposed at a position that does not overlap with each of the first connecting piece 46 and the second connecting piece 56 in a plan view.

[0054] <Distribution member 33> As shown in Figure 6, the distribution member 33 is a member that distributes the coolant between the corresponding inlet ports 43 to 45 and outlet ports 53 to 55. The distribution member 33 is configured by stacking a distribution plate 60 and an intermediate plate 61 in the axial direction. The distribution plate 60 is interposed between the first housing 31 and the second housing 32. The distribution plate 60 includes a partition portion 62, a first mounting piece 63, and a second mounting piece 64.

[0055] Figure 11 is a cross-sectional view corresponding to line XI-XI in Figure 9. Figure 12 is a plan view of the front surface side of the distributor plate 60. As shown in Figures 11 and 12, the partition portion 62 is formed in a circular plate shape with its thickness direction in the axial direction. The partition portion 62 separates the inner space of the first housing 31 from the inner space of the second housing 32 by having its outer periphery held in a state where it is sandwiched in the axial direction between the first circumferential wall 41g and the second circumferential wall 51g. The partition portion 62 is formed with a plurality of inlet circuits (first circuits) 71a to 71g and a plurality of outlet circuits (second circuits) 72a to 72e (see Figure 13).

[0056] As shown in Figure 12, the inlet circuits 71a to 71g are formed in a portion extending from the surface of the partition 62 to the axial center. In this embodiment, the inlet circuits 71a to 71g are a first inlet circuit 71a, a second inlet circuit 71b, a third inlet circuit 71c, a fourth inlet circuit 71d, a fifth inlet circuit 71e, a sixth inlet circuit 71f, and a seventh inlet circuit 71g. That is, the number of inlet circuits 71a to 71g (e.g., seven) is greater than the number of inlets 41c to 41e (e.g., three). The inlet circuits 71a to 71g are formed at intervals in the circumferential direction of the partition 62.

[0057] The front-side opening of the first inlet circuit 71 a is formed in a trapezoidal shape whose circumferential width gradually increases radially outward in a plan view of the front side. Specifically, the front-side opening edge of the first inlet circuit 71 a is formed by a first outer edge portion 71 a1, a first inner edge portion 71 a2, and a pair of first side edge portions 71 a3.

[0058] The first outer edge 71a1 constitutes the radially outer edge of the front-side opening edge of the first inlet circuit 71a. The first outer edge 71a1 is formed in an arc shape that convexly extends radially outward. The first inner edge 71a2 constitutes the radially inner edge of the front-side opening edge of the first inlet circuit 71a. The first inner edge 71a2 is formed in an arc shape that convexly extends radially outward. The circumferential length of the first inner edge 71a2 is shorter than the circumferential length of the first outer edge 71a1. In the illustrated example, the radius of curvature of the first inner edge 71a2 is smaller than the radius of curvature of the first outer edge 71a1. The pair of first side edges 71a3 connect one circumferential end of the first outer edge 71a1 and the first inner edge 71a2 to each other, and connect the other circumferential end of the first outer edge 71a1 and the first inner edge 71a2 to each other. The first side edges 71a3 are formed in a convex arc shape that extends away from each other in the circumferential direction. The boundary between the first side edge 71a3 and the first outer edge 71a1 and the boundary between the first side edge 71a3 and the first inner edge 71a2 are rounded.

[0059] The first inlet circuit 71 a is formed in a tapered shape such that the opening area (area in a plan view of the front surface side) gradually decreases from the front surface side to the back surface side. The back surface side openings of the first inlet circuit 71 a overlap at the circumferential and radial centers within the front surface side openings of the first inlet circuit 71 a in a plan view.

[0060] The second inlet circuit 71b is located on one circumferential side of the first inlet circuit 71a. Similar to the first inlet circuit 71a, the surface-side opening of the second inlet circuit 71b is trapezoidal in plan view. Specifically, the edge of the surface-side opening of the second inlet circuit 71b is defined by a second outer edge 71b1, a second inner edge 71b2, and a pair of second side edges 71b3.

[0061] The second inlet circuit 71b is tapered so that the opening area gradually decreases from the front side to the back side. The back side opening of the second inlet circuit 71b overlaps with the other circumferential side and radially outer side of the front side opening of the second inlet circuit 71b in plan view.

[0062] The third inlet circuit 71c is located on one circumferential side of the second inlet circuit 71b. The third inlet circuit 71c has a uniform opening area throughout its axial length. In a plan view, the third inlet circuit 71c has an elliptical shape whose circumferential width gradually increases toward the radially outer side and whose longitudinal direction is the radial direction. Specifically, the front-side opening edge of the third inlet circuit 71c is defined by a third outer edge portion 71c1, a third inner edge portion 71c2, and a pair of third side edge portions 71c3.

[0063] The third outer edge portion 71c1 is formed in a convex arc shape facing radially outward. The third inner edge portion 71c2 is formed in a convex arc shape facing radially inward. The circumferential length of the third inner edge portion 71c2 is shorter than the circumferential length of the third outer edge portion 71c1. In the illustrated example, the radius of curvature of the third inner edge portion 71c2 is smaller than the radius of curvature of the third outer edge portion 71c1. The pair of third side edge portions 71c3 are formed in a convex arc shape facing away from each other in the circumferential direction. The third side edge portion 71c3 and the third outer edge portion 71c1, and the third side edge portion 71c3 and the third inner edge portion 71c2, are smoothly connected to each other.

[0064] The fourth inlet circuit 71d is located on one circumferential side of the third inlet circuit 71c. Similar to the third inlet circuit 71c, the fourth inlet circuit 71d has an elliptical shape whose circumferential width gradually increases radially outward and whose longitudinal direction is the radial direction. Specifically, the front-side opening edge of the fourth inlet circuit 71d is defined by a fourth outer edge portion 71d1, a fourth inner edge portion 71d2, and a pair of fourth side edge portions 71d3.

[0065] The fifth inlet circuit 71e is provided on one circumferential side of the fourth inlet circuit 71d and radially opposite the first inlet circuit 71a. Similar to the first inlet circuit 71a, the fifth inlet circuit 71e is formed in a trapezoidal shape whose circumferential width gradually increases toward the radially outer side in a front-side plan view. Specifically, the front-side opening of the fifth inlet circuit 71e is defined by a fifth outer edge 71e1, a fifth inner edge 71e2, and a pair of fifth side edges 71e3.

[0066] The sixth inlet circuit 71f is located on one circumferential side of the fifth inlet circuit 71e. Similar to the third inlet circuit 71c, the sixth inlet circuit 71f has an elliptical shape whose circumferential width gradually increases toward the radially outer side and whose longitudinal direction is the radial direction. Specifically, the front-side opening edge of the sixth inlet circuit 71f is defined by a sixth outer edge portion 71f1, a sixth inner edge portion 71f2, and a pair of sixth side edge portions 71f3.

[0067] The seventh inlet circuit 71g is located between the sixth inlet circuit 71f and the first inlet circuit 71a. The front-side opening of the seventh inlet circuit 71g is trapezoidal and wider in the circumferential direction than the first inlet circuit 71a. Specifically, the front-side opening edge of the seventh inlet circuit 71g is formed by a seventh outer edge 71g1, a seventh inner edge 71g2, and a pair of seventh side edges 71g3. The seventh inlet circuit 71g is tapered such that the opening area gradually decreases from the front side to the back side. In a plan view, the back-side openings of the seventh inlet circuit 71g overlap at the circumferential center of the front-side opening of the seventh inlet circuit 71g.

[0068] FIG. 13 is a plan view of the rear surface side of the distributor plate 60. As shown in FIGS. 11 and 13, the outlet circuits 72a to 72e are the first outlet circuit 72a, the second outlet circuit 72b, the third outlet circuit 72c, the fourth outlet circuit 72d, and the fifth outlet circuit 72e. The outlet circuits 72a to 72e are spaced apart in the circumferential and radial directions in the partition portion 62. The outlet circuits 72a to 72e are formed in a portion of the partition portion 62 extending from the rear surface to the axial center. In this embodiment, the number of outlet circuits 72a to 72e (e.g., five) is fewer than the number of inlet circuits 71a to 71g (e.g., seven). The outlet circuits 72a to 72e are connected to at least some of the inlet circuits 71a to 71g in the axial center of the partition portion 62. In other words, the outlet circuits 72a to 72e aggregate at least a portion of the inlet circuits 71a to 71g.

[0069] The first outflow circuit 72a is formed at a position overlapping with the first inflow circuit 71a in a plan view from the back side. The first outflow circuit 72a is connected only to the first inflow circuit 71a among the inflow circuits 71a to 71g. The first outflow circuit 72a and the first inflow circuit 71a form a first connection circuit 75a that penetrates the partition portion 62 in the axial direction. The second outflow circuit 72b is formed at a position overlapping with the second inflow circuit 71b in a plan view from the back side. The second outflow circuit 72b is connected only to the second inflow circuit 71b among the inflow circuits 71a to 71g. The second outflow circuit 72b and the second inflow circuit 71b form a second connection circuit 75b that penetrates the partition portion 62 in the axial direction.

[0070] The third outflow circuit 72c is a groove extending radially (in the second radial direction L2) through a portion of the partition portion 62 that includes the central axis O1. The third outflow circuit 72c is connected to the seventh inflow circuit 71g at its +L2 end. The third outflow circuit 72c is connected to the third inflow circuit 71c at its -L2 end. That is, the third outflow circuit 72c is connected to the third inflow circuit 71c and the seventh inflow circuit 71g among the inflow circuits 71a to 71g. The third inflow circuit 71c and the seventh inflow circuit 71g are combined into the third outflow circuit 72c and, together with the third outflow circuit 72c, form a third connection circuit 75c.

[0071] The fourth outflow circuit 72d is provided on the partition portion 62 on the opposite side (+L1 side) of the third outflow circuit 72c from the first outflow circuit 72a. The fourth outflow circuit 72d is provided alongside the third outflow circuit 72c and is a groove extending in the second radial direction L2. In the illustrated example, the fourth outflow circuit 72d is formed in an arc shape convex toward the -L1 side. The fourth outflow circuit 72d is connected to the sixth inflow circuit 71f at its +L2 side end. The fourth outflow circuit 72d is connected to the fourth inflow circuit 71d at its -L side end. That is, the fourth outflow circuit 72d is connected to the fourth inflow circuit 71d and the sixth inflow circuit 71g among the inflow circuits 71a to 71g. The fourth inflow circuit 71d and the sixth inflow circuit 71f are combined into the fourth outflow circuit 72d and, together with the fourth outflow circuit 72d, form the fourth connection circuit 75d.

[0072] The fifth outlet circuit 72e is provided on the partition 62 on the opposite side of the fourth outlet circuit 72d from the third outlet circuit 72c. The fifth outlet circuit 72e is formed in a position overlapping the fifth inlet circuit 71e in a plan view. The fifth outlet circuit 72e is connected only to the fifth inlet circuit 71e among the inlet circuits 71a to 71g. The fifth outlet circuit 72e and the fifth inlet circuit 71e constitute a fifth connection circuit 75e that axially penetrates the partition 62.

[0073] 11 and 12 , a recess 81 that opens to the surface side is formed in the radial center of the partition portion 62. The recess 81 is formed in a cylindrical shape that is coaxial with the central axis O1. A shaft holding portion 82 that protrudes toward a first axial side is formed in the bottom wall of the recess 81. The shaft holding portion 82 is formed in a cylindrical shape that is smaller than the inner diameter of the recess 81 and is coaxial with the central axis O1. In the illustrated example, the axial height of the shaft holding portion 82 is smaller than the axial depth of the recess 81.

[0074] 12 , a pair of stopper walls 83 are provided within the recess 81. Each stopper wall 83 extends radially within the recess 81 to bridge between the outer circumferential surface of the shaft holding portion 82 and the inner circumferential surface of the recess 81. Of the spaces defined by the stopper walls 83 within the recess 81, the space on the receding angle side functions as the accommodation space S1. However, the angle formed by the stopper walls 83 can be changed as appropriate.

[0075] As shown in FIGS. 5 and 10 , the first mounting pieces 63 are used to assemble the first housing 31 and the distribution plate 60. The first mounting pieces 63 protrude radially outward from a portion of the outer peripheral surface of the partition portion 62 located on the front side. A plurality of first mounting pieces 63 are provided at intervals in the circumferential direction. Each first mounting piece 63 overlaps with a corresponding first connecting piece 46 in a plan view. A first through hole 63a is formed at the radially outer end (tip) of each first mounting piece 63, penetrating the first mounting piece 63 in the axial direction. The first housing 31 and the distribution plate 60 are assembled by passing first fastening members 77 (e.g., screws) through the overlapping first mounting pieces 63 and first connecting pieces 46 from the back side. Specifically, the first fastening members 77 are fastened to the first fastening holes 46a through the first through holes 63a. 11 , a first packing 90 that collectively surrounds the inlet circuits 71 a to 71 g is provided in a portion of the partition 62 that is located radially outward of the inlet circuits 71 a to 71 g. The first packing 90 is sandwiched between the distribution plate 60 and the first housing 31.

[0076] As shown in Figures 5 and 12, the second mounting piece 64 serves to assemble the second housing 32 and the distribution plate 60. The second mounting piece 64 is a portion of the outer peripheral surface of the partition 62 located on the back side, and protrudes radially outward from a position offset from the first mounting piece 63 in the circumferential direction. A plurality of second mounting pieces 64 are provided at intervals in the circumferential direction. Note that the first mounting piece 63 and the second mounting piece 64 may at least partially overlap each other when viewed in the circumferential direction. This allows the thickness of the mounting pieces 63, 64 to be secured while keeping the thickness of the partition 62 small.

[0077] In a plan view, each second mounting piece 64 overlaps with a corresponding second connecting piece 56. A second through hole 64a that penetrates each second mounting piece 64 in the axial direction is formed at the radially outer end (tip) of each second mounting piece 64. The second housing 32 and the distribution plate 60 are assembled by passing second fastening members 78 (e.g., screws) through the overlapping second mounting pieces 64 and second connecting pieces 56 from the surface side. Specifically, the second fastening members 78 are fastened to the second fastening holes 56a through the second through holes 64a.

[0078] Figure 14 is a plan view of the intermediate plate 61 and the second housing 32. As shown in Figures 11 and 14, the intermediate plate 61 connects the outflow circuits 72a to 72e with the outflow ports 51c to 51e. The intermediate plate 61 is placed on the back side of the partition 62. The intermediate plate 61 is formed in a disk shape that has the same external shape as the partition 62 in a plan view. The intermediate plate 61 is sandwiched between the partition 62 and the bottom wall 51a.

[0079] As shown in FIGS. 8 and 14 , the intermediate plate 61 is formed with a plurality of connection ports 61a to 61e. The connection ports 61a to 61e are a first connection port 61a, a second connection port 61b, a third connection port 61c, a fourth connection port 61d, and a fifth connection port 61e. The first connection port 61a axially penetrates the intermediate plate 61 at a position overlapping the -L1 side end of the second outlet 51d and the first outflow circuit 72a in a plan view. In other words, the first connection port 61a provides communication between the second outlet 51d and the first outflow circuit 72a. The second connection port 61b is located on one side of the first connection port 61a in the circumferential direction. The second connection port 61b axially penetrates the intermediate plate 61 at a position overlapping the -L1 side end of the third outlet 51e and the second outflow circuit 72b in a plan view. That is, the third outlet 51e communicates with the second outlet circuit 72b through the second connection port 61b.

[0080] The third connection port 61c is located on one circumferential side of the second connection port 61b. The third connection port 61c axially penetrates the intermediate plate 61 at a position that overlaps with the +L1 side end of the third outlet 51e and the -L2 side end of the fourth outlet circuit 72d in a plan view. In other words, the third outlet 51e is in communication with the fourth outlet circuit 72d through the third connection port 61c.

[0081] The fourth connection port 61 d is located on one circumferential side of the third connection port 61 c. The fourth connection port 61 d axially penetrates the intermediate plate 61 at a position that overlaps with the +L1 side end of the second outlet 51 d and the fifth outlet circuit 72 e in a plan view. That is, the second outlet 51 d communicates with the first outlet circuit 72 a through the first connection port 61 a and with the fifth outlet circuit 72 e through the fourth connection port 61 d.

[0082] The fifth connection port 61e is located on one circumferential side of the fourth connection port 61d. The fifth connection port 61e axially penetrates the third outflow circuit 72c at a position overlapping the +L2 side end of the third outflow circuit 72c and the first outflow port 51c in plan view. That is, the first outflow port 51c is in communication with the third outflow circuit 72c through the fifth connection port 61e.

[0083] As shown in FIG. 11 , a second packing 91 is provided between the intermediate plate 61 and the distribution plate 60. The second packing 91 is sandwiched between the intermediate plate 61 and the distribution plate 60, and is disposed so as to separate the outflow circuits 72a to 72e. This seals the spaces between the outflow circuits 72a to 72e. Furthermore, a third packing 92 is provided between the intermediate plate 61 and the second housing 32 (second peripheral wall 51g). The third packing 92 is sandwiched between the intermediate plate 61 and the second housing 32, and is disposed so as to separate the outflow ports 51c to 51e. This seals the spaces between the outflow ports 51c to 51e.

[0084] 6 and 11, the valve element 22 switches between communication and blocking between each of the inlets 41c to 41e and each of the inlet circuits 71a to 71g. The valve element 22 is configured to be rotatable about the central axis O1 while being superimposed on the front surface of the distribution plate 60. Specifically, the valve element 22 includes a rotor 85 and a protrusion 86.

[0085] 6 and 12, the rotor 85 is formed in a disk shape and disposed coaxially with the central axis O1. The outer peripheral edge of the rotor 85 is located radially outward of the inlet circuits 71a to 71g. Therefore, the rotor 85 is overlapped with the distribution plate 60 so as to cover the inlet circuits 71a to 71g from the surface side.

[0086] A connecting hole 85a is formed in the radial center of the rotor 85. The connecting hole 85a penetrates the rotor 85 in the axial direction. The rotor 85 is formed with a plurality of through holes (a first through hole 85b, a second through hole 85c, and a third through hole 85d). Each of the through holes 85b to 85d penetrates the rotor 85 in the axial direction. In the illustrated example, the through holes 85b to 85d are formed at equal intervals in the circumferential direction. That is, the number of the through holes 85b to 85d is the same as the number of the inlets 41c to 41e, but is fewer than the number of the inlet circuits 71a to 71g.

[0087] In this embodiment, the through holes 85b to 85d are formed to have the same shape and size. In the following explanation, the shape of each of the through holes 85b to 85d will be described using the first through hole 85b as an example. The first through hole 85b is formed to have the same shape and size as, for example, the front-side opening edge of the third inlet circuit 71c. That is, in a plan view, the first through hole 85b is formed in an elliptical shape whose circumferential width gradually increases toward the radially outer side and whose longitudinal direction is the radial direction. Specifically, the opening edge of the first through hole 85b is formed by an outer edge portion 87, an inner edge portion 88, and a side edge portion 89.

[0088] The outer edge portion 87 is formed in a convex arc shape facing radially outward. The inner edge portion 88 is formed in a convex arc shape facing radially inward. The circumferential length of the inner edge portion 88 is shorter than the circumferential length of the outer edge portion 87. In the illustrated example, the radius of curvature of the inner edge portion 88 is smaller than the radius of curvature of the outer edge portion 87. The pair of side edge portions 89 are formed in a convex arc shape facing away from each other in the circumferential direction. The side edge portions 89 and the outer edge portion 87, and the side edge portions 89 and the inner edge portion 88, are smoothly connected to each other. The outer shapes of the respective through holes 85b to 85d may be different from each other.

[0089] The protrusion 86 protrudes toward the rear surface of the rotor 85 from a portion located radially between the connecting hole 85a and each of the through holes 85b to 85d. In a plan view, the protrusion 86 is formed in an arc shape centered on the central axis O1 and shorter than the circumferential length of the accommodation space S1. The protrusion 86 is accommodated within the accommodation space S1. The protrusion 86 abuts against the surface of each stopper wall 83 facing the accommodation space S1, thereby restricting rotation of the valve element 22 about the central axis O1. In this embodiment, the rotor 85 can be stopped at four rotational positions, spaced at 30° intervals, around the central axis O1 according to the various circulation modes (bi-independent mode, drive-source-priority mode, battery-priority mode, and combined mode) described above. That is, the rotor 85 is configured to be rotatable back and forth within a range of 120° around the central axis O1. In this case, the product (for example, 12) of the number of the passage holes 85b to 85d and the stop positions of the valve body 22 is greater than the number of the inflow circuits 71a to 71g.

[0090] As the valve element 22 rotates about the central axis O1, at least a portion of one of the through holes 85b to 85d and one of the inflow circuits 71a to 71g overlap in a plan view, thereby communicating one of the inflow circuits 71a to 71g with the inflow ports 41c to 41e. On the other hand, as the valve element 22 rotates about the central axis O1, a portion of the rotor 85 that does not have the through holes 85b to 85d overlaps in a plan view with one of the inflow circuits 71a to 71g, thereby closing one of the outflow circuits 72a to 71g.

[0091] Specifically, in the control valve 5 of this embodiment, the first through hole 85b communicates with one of the fifth inlet circuit 71e to seventh inlet circuit 71g depending on the stop position of the valve body 22 (communication with the other inlet circuits is blocked by the rotor 85). The second through hole 85c communicates with one of the first inlet circuit 71a, second inlet circuit 71b, and seventh inlet circuit 71g depending on the stop position of the valve body 22 (communication with the other inlet circuits is blocked by the rotor 85). The third through hole 85d communicates with one of the second inlet circuit to fifth inlet circuit 71e depending on the stop position of the valve body 22 (communication with the other inlet circuits is blocked by the rotor 85).

[0092] In this case, the communication area between one passage hole and one inlet circuit (the area of ​​the overlapping portion in plan view) gradually increases as the communication between the one passage hole and one inlet circuit changes from a blocked state to a connected state. The communication area is maximized when the entire one passage hole overlaps with the one inlet circuit. Thereafter, as the valve body 22 continues to rotate, the communication area gradually decreases.

[0093] 6, the seal mechanisms 23 connect the corresponding inlets 41c to 41e and the corresponding through holes 85b to 85d within the first housing 31. That is, a seal mechanism 23 is individually provided for each of the inlets 41c to 41e (each of the through holes 85b to 85d). Each seal mechanism 23 has the same configuration. Therefore, in the following description, the details of the seal mechanisms 23 will be described using the seal mechanism 23 connecting the third inlet 41e and the third through hole 85d as an example.

[0094] 15 is an enlarged perspective view of the control valve 5 with the first housing 31 removed. As shown in FIG.

[0095] The seal members 100 form individual sealed spaces S2 between the third inlet 41 e and the third through hole 85 d within the first housing 31. Each seal member 100 is provided independently and displaceable at least in the axial direction within the first housing 31. The seal members 100 include a space forming portion 105, an inward rib 106, and a connecting tube 107.

[0096] Figure 16 is a cross-sectional view corresponding to line XVI-XVI in Figure 11. As shown in Figures 15 and 16, the space forming portion 105 is formed in a box shape that has an arc shape extending in the circumferential direction in a plan view and is open toward the back side. The peripheral wall 110 of the space forming portion 105 includes an outer wall 110a, an inner wall 110b, and a pair of lateral side walls 110c.

[0097] As shown in FIG. 16 , the outer wall 110a is formed in an arc shape coaxial with the central axis O1 in a plan view. The outer surface of the outer wall 110a is close to or abuts the inner surface of the first peripheral wall 41g. The inner wall 110b is formed in an arc shape coaxial with the central axis O1 in a plan view. The inner wall 110b is located radially outward from the connecting hole 85a. The circumferential length of the inner wall 110b is shorter than the circumferential length of the outer wall 110a. The lateral side walls 110c connect the circumferential ends of the outer wall 110a and the inner wall 110b that face each other in the radial direction. The lateral side walls 110c extend in a direction approaching each other in the circumferential direction as they extend radially inward. In the circumferentially adjacent seal mechanisms 23, the lateral side wall 110c located on one circumferential side of one seal member 100 contacts the lateral side wall 110c located on the other circumferential side of another seal member 100 adjacent to the one seal member 100. Therefore, relative movement in the circumferential direction between the seal mechanisms 23 (seal members 100) is restricted.

[0098] In a plan view, the third through hole 85d is located inside the peripheral wall 110 (space forming portion 105). That is, the rear side opening of the space forming portion 105 functions as a rear side communication port 105a that communicates with the third through hole 85d. The third through hole 85d moves back and forth between the pair of lateral side walls 110c around the central axis O1 as the valve body 22 rotates. The rear end surfaces of the peripheral wall 110 (outer wall 110a, inner wall 110b, and lateral side wall 110c) are formed as flat surfaces perpendicular to the axial direction. The rear end surface of the peripheral wall 110 is in close contact with the surface of the rotor 85. That is, the rear end surface of the peripheral wall 110 functions as a sliding surface (sealing surface) that slides on the surface of the rotor 85 as the rotor 85 rotates.

[0099] 11 and 16 , the inward rib 106 protrudes radially inward from the inner wall 110b. The inward rib 106 is located radially outwardly adjacent to a boss 85f of the rotor 85 that is provided around the connecting hole 85a. The boss 85f protrudes outward from the rotor 85. In other words, radial movement of the seal member 100 relative to the first housing 31 and the rotor 85 is restricted between the inner surface of the first circumferential wall 41g and the outer peripheral surface of the boss 85f.

[0100] As shown in FIGS. 11 and 15 , the connecting tube 107 protrudes from the circumferential center of the top wall 111 of the seal member 100 toward the surface. Specifically, a surface communication port 111a is formed in the top wall 111 at a position that overlaps with the third inlet 41e in a plan view. The connecting tube 107 is formed to surround the opening edge of the surface communication port 111a. The inner diameter of the connecting tube 107 is larger than the inner diameter of the third inlet 41e. The outer diameter of the connecting tube 107 is smaller than the inner diameter of the seal accommodating portion 41f. The surface-side end of the connecting tube 107 is accommodated within the seal accommodating portion 41f. In other words, the connecting tube 107 surrounds the periphery of the third inlet 41e. An O-ring 112 is interposed between the outer peripheral surface of the connecting tube 107 and the inward surface of the seal accommodating portion 41f.

[0101] 11 , a third through-hole 85d opens into the inner space (sealed space S2) of the seal member 100 through the space forming portion 105. A third inlet 41e opens into the inner space (sealed space S2) of the seal member 100 through the connecting tube 107. In addition, the back end surface of the peripheral wall 110 of the seal member 100 is in close contact with the surface of the rotor 85, and the outer peripheral surface of the connecting tube 107 is in close contact with the inner peripheral surface of the seal accommodating portion 41f via an O-ring 112. As a result, each seal mechanism 23 always allows communication between the corresponding inlets 41c to 41e and through-holes 85b to 85d, while always blocking communication between adjacent sealed spaces S2.

[0102] As shown in FIG. 15 , the biasing member 101 is interposed between the seal member 100 and the first housing 31 and presses the seal member 100 toward the rotor 85. The biasing member 101 is, for example, a wave spring formed by spirally winding a corrugated rectangular wire. As shown in FIG. 11 , the biasing member 101 is axially interposed between the inner flange portion 111b, which protrudes inward from the opening edge of the surface communication port 111a, and the top surface of the seal accommodating portion 41f. That is, within the seal accommodating portion 41f, the biasing member 101 is surrounded from the outside by the connecting tube 107 and surrounds the outward surface (third inlet 41e) of the seal accommodating portion 41f. Note that in the illustrated example, the third inlet 41e is positioned at the same height as the inner flange portion 111b in the axial direction.

[0103] <Drive unit 24> As shown in Fig. 5, the drive unit 24 rotates the valve element 22. The drive unit 24 includes an actuator 120 and an output shaft 121. The actuator 120 is configured by housing a motor, a reduction mechanism, a control board, and other components (not shown) in a casing. The actuator 120 is placed on the first housing 31 on the front side thereof. The actuator 120 is attached to mounting legs 48 provided on the first base 41.

[0104] The output shaft 121 protrudes from the actuator 120 toward the back side, coaxial with the central axis O1. The front end of the output shaft 121 is connected to a motor inside the casing of the actuator 120. The back end of the output shaft 121 enters the first housing 31 through the through hole 41b. The back end of the output shaft 121 is fitted into the connecting hole 85a of the valve body 22. As a result, the driving force (rotational force) generated by the actuator 120 is transmitted to the valve body 22 via the output shaft 121.

[0105] As shown in Fig. 11, a bearing 123 and a shaft seal 124 are provided on a portion of the output shaft 121 located within the through hole 41b. The bearing 123 is provided on a first axial side of the shaft seal 124. The first housing 31 supports the output shaft 121 rotatably about the central axis O1 via the bearing 123. Both axial ends of the output shaft 121 are supported by the actuator 120 and the valve body 22, respectively. A central portion of the output shaft 121 in the axial direction is supported by the bearing 123. The shaft seal 124 is interposed between the outer circumferential surface of the output shaft 121 and the inner circumferential surface of the through hole 41b, on the back side of the bearing 123.

[0106] [Operation Method of Control Valve 5] Next, an operation method of the above-described control valve 5 will be described. In the following, the flow of coolant inside the control valve 5 in the various flow modes (two-way independent mode, drive-source priority mode, battery priority mode, and combined mode) described above will be described. Figures 17 to 24 are operation explanatory diagrams for explaining the flow of coolant in each of the various flow modes for the cooling system 1. Of Figures 17 to 24, Figures 17 and 18 show the two-way independent mode, Figures 19 and 20 show the drive-source priority cooling mode, Figures 21 and 22 show the battery priority cooling mode, and Figures 23 and 24 show the combined mode, respectively.

[0107] <Two-way Independent Mode> To circulate the coolant separately through the battery flow path 2 and the drive flow path 3 in the two-way independent mode shown in FIGS. 1, 17, and 18, the valve element 22 is set to the position shown in FIG. 18(2). Then, the coolant passes through the first inlet port 43 shown in FIG. 18(1) and flows into the sealed space S2 corresponding to the first inlet 41c, passes through the first through hole 85b shown in FIG. 18(2), and then flows into the seventh inlet circuit 71g in FIG. 18(3). The coolant that flows into the seventh inlet circuit 71g flows into the third outlet circuit 72c, then passes through the fifth connection port 61e and the first outlet 51c shown in FIG. 18(4), and reaches the first outlet port 53. The coolant is then supplied to the battery flow path 2 through the first outlet port 53. The coolant supplied to the battery flow path 2 is pumped downstream by the first pump 6, as shown in FIGS. 1 and 17. The coolant flowing through the battery flow path 2 exchanges heat with the cooling device 7, the heating device 8, and the battery 9 as it passes through them, thereby maintaining the battery 9 in an optimum temperature range.

[0108] The cooling liquid passes through the second inlet port 44 shown in FIG. 18(1) and flows into the sealed space S2 corresponding to the second inlet 41d. After passing through the second through-hole 85c shown in FIG. 18(2), it flows into the first inlet circuit 71a in FIG. 18(3). The cooling liquid that flows into the first inlet circuit 71a flows into the first outlet circuit 72a and then reaches the second outlet port 54 through the first connection port 61a and the second outlet port 51d shown in FIG. 18(4). The cooling liquid is then supplied to the drive flow path 3 through the second outlet port 54. The cooling liquid supplied to the drive flow path 3 is pumped downstream by the second pump 10, as shown in FIGS. 1 and 17. The cooling liquid flowing through the drive flow path 3 exchanges heat with the drive module 11 as it passes through the drive module 11. This maintains the drive module 11 at an optimal temperature.

[0109] In addition, in the independent mode, the inside of the control valve 5 is connected to the radiator flow path 4 through the third through hole 85d, the fourth inlet circuit 71d, the fourth outlet circuit 72d, the third connection port 61c, the third outlet port 51e and the third outlet port 55.

[0110] 2, 19, and 20, to form the drive flow path 3 and the radiator flow path 4 into a single closed circuit, the valve element 22 is set to the position shown in Fig. 20(2). Then, as in the above-described independent mode, the coolant that has flowed into the first outlet port 53 passes through the first through hole 85b, the seventh inlet circuit 71g, the third outlet circuit 72c, and the fifth connection port 61e, and is then supplied to the battery flow path 2 through the first outlet port 53.

[0111] On the other hand, the coolant that flows into the second inlet port 44 passes through the second through hole 85c and then flows into the second inlet circuit 71b in FIG. 20(3). The coolant that flows into the second inlet circuit 71b flows into the second outlet circuit 72b and then passes through the second connection port 61b and the third outlet port 51e shown in FIG. 20(4) to reach the third outlet port 55. The coolant is then supplied to the radiator flow path 4 through the third outlet port 55. As shown in FIGS. 2 and 19, the coolant supplied to the radiator flow path 4 undergoes heat exchange in the radiator 15 and then flows into the third inlet port 45. The coolant that flows into the third inlet port 45 flows into the fifth inlet circuit 71e in FIG. 20(3). The coolant that has flowed into the fifth inlet circuit 71e flows into the fifth outlet circuit 72e, and then passes through the fourth connection port 61d and the second outlet port 51d shown in FIG. 20(4) to reach the second outlet port 54. The coolant is then supplied to the drive flow path 3 through the second outlet port 54. As a result, the drive flow path 3 is supplied with coolant at a relatively low temperature that has been cooled by the radiator 15.

[0112] <Battery-Priority Cooling Mode> To form the battery flow path 2 and the radiator flow path 4 into a single closed circuit as in the battery-priority cooling mode shown in FIGS. 3, 21, and 22, the valve element 22 is set to the position shown in FIG. 22(2). Then, the coolant that flows into the first inlet port 43 passes through the first through hole 85b and then flows into the sixth inlet circuit 71f in FIG. 22(3). The coolant that flows into the sixth inlet circuit 71f flows into the fourth outlet circuit 72d and then passes through the third connection port 61c and the third outlet port 51e shown in FIG. 22(4) to reach the third outlet port 55. The coolant is then supplied to the radiator flow path 4 through the third outlet port 55. As shown in FIGS. 3 and 21, the coolant supplied to the radiator flow path 4 undergoes heat exchange in the radiator 15 and then flows into the third inlet port 45. The coolant that has flowed into the third inlet port 45 flows into the third inlet circuit 71c in Fig. 22(3). The coolant that has flowed into the third inlet circuit 71c flows into the third outlet circuit 72c, and then passes through the fifth connection port 61e and the first outlet port 51c shown in Fig. 22(4) to reach the first outlet port 53. The coolant is then supplied to the battery flow path 2 through the first outlet port 53. As a result, the battery flow path 2 is supplied with coolant at a relatively low temperature that has been cooled by the radiator 15.

[0113] On the other hand, the cooling liquid that flows into the second inlet port 44 passes through the second through hole 85c, the first inlet circuit 71a, the first outlet circuit 72a, the first connection port 61a, and the second outlet port 51d, as in the above-mentioned independent mode, and is then supplied into the driving flow path 3 through the second outlet port 54.

[0114] <Combined Mode> To form the battery flow path 2 and the drive flow path 3 into a single closed circuit as in the combined mode shown in Figures 4, 23, and 24, the valve element 22 is set to the position shown in Figure 24(2). The coolant that flows into the first inlet port 43 then passes through the first through hole 85b and flows into the fifth inlet circuit 71e in Figure 24(3). The coolant that flows into the fifth inlet circuit 71e flows into the fifth outlet circuit 72e and then passes through the fourth connection port 61d and the second outlet port 51d shown in Figure 24(4) to reach the second outlet port 54. The coolant is then supplied to the drive flow path 3 through the second outlet port 54. The coolant supplied to the drive flow path 3 undergoes heat exchange in the drive module 11 and then flows into the second inlet port 44. The coolant that flows into the second inlet port 44 flows into the seventh inlet circuit 71g in Figure 24(3). The coolant that has flowed into the seventh inlet circuit 71g flows into the third outlet circuit 72c, and then passes through the fifth connection port 61e and the first outlet port 51c shown in FIG. 24(4) to reach the first outlet port 53. The coolant is then supplied to the battery flow path 2 through the first outlet port 53. As a result, the coolant that has passed through the drive flow path 3 is supplied to the battery flow path 2.

[0115] In the combined mode, the inside of the control valve 5 is connected to the radiator flow path 4 through the third through hole 85d, the second inlet circuit 71b, the second outlet circuit 72b, the second connection port 61b, the third outlet port 51e and the third outlet port 55.

[0116] As described above, in the control valve 5 of this embodiment, the passage holes 85b-85d are stopped at one of four stop positions (12 in total) for each of the inlets 41c-41e depending on the flow mode. In this state, the passage holes 85b-85d are connected to one of the inlet openings 71a-71g depending on the position of the selected passage hole 85b-85d. Therefore, the coolant that has flowed into the first housing 31 through the three inlets 41c-41e flows into the inlet circuit 71a-71g that is connected to the passage hole 85b-85d. The coolant that has flowed into the inlet circuit 71a-71g passes through the corresponding outlet circuit 72a-72e and the connection port 61a-61e to reach each of the outlets 51c-51e, and is then distributed to each of the flow paths 2-4 through the outlet ports 53-55. That is, in the control valve 5 of this embodiment, the coolant flowing in from the three inlets 41c to 41e is selected from four communication patterns (12 in total) for each of the inlets 41c to 41e, and then collected again at the three outlets 51c to 51e.

[0117] As described above, the control valve 5 of this embodiment includes a first housing 31 having a plurality of inlets (first openings) 41c-41e through which the coolant (fluid) passes, a second housing 32 arranged opposite the first housing 31 in the axial direction (first direction) and having a plurality of outlets (second openings) 51c-51e through which the coolant passes, and a valve body 22 and a distributor 33 (switching mechanism) arranged between the first housing 31 and the second housing 32 and switching between connection circuits (circuits) 75a-75b connecting the inlets 41c-41e and the outlets 51c-51e. The distributor 33 also includes a plurality of inlet circuits (first circuits) 71a-71g formed in a position facing the valve body 22, the number of which is different from the first inlets 41c-41e, and a plurality of outlets 51c-51e formed in a number different from the number of the inlet circuits 71a-71g. The multiple inlet circuits 71a-71g are switched between communication and disconnection with any of the through holes 85b-85d as the valve body 22 rotates. Each of the multiple outlets 51c-51e is connected to at least one of the inlet circuits 71a-71g, while also communicating with any of the outlets 51c-51e. With this configuration, the inlet circuits 71a-71g that communicate with the inlet ports 41c-41e are switched depending on the rotational position of the valve body 22. In this case, since the number of inlet circuits 71a-71g is different from the number of inlet ports 41c-41e, a flow pattern different from the number of inlet ports 41c-41e can be selected. Therefore, the coolant flows between the inlet ports 41c-41e and the inlet circuits 71a-71g, which are connected via the through holes 85b-85d. The coolant is then supplied to the outside of the control valve 5 via the outflow circuits 72a to 72e and the outlets 51c to 51e. In this way, by switching the communication between the inflow circuits 71a to 71g, which are formed in a number different from the number of inlets 41c to 41e, and the inlets 41c to 41e by rotating the valve body 22, as long as there are the same number of inlets 41c to 41e and outlets 51c to 51e as the number of flow paths to be temperature-controlled, it is possible to switch between a number of flow patterns different from the number of inlets 41c to 41e and outlets 51c to 51e by the switching mechanism (valve body 22 and distribution member 33).Therefore, compared to when pipes corresponding to the number of coolant flow patterns are provided outside the control valve or when multiple control valves are provided on the cooling system 1, it is possible to reduce the size of the cooling system 1 and the number of control valves. Also, for example, when assembling the control valve 5 to a vehicle, the cycle time can be shortened compared to when pipes are provided for each flow pattern. This allows for lower costs for the cooling system 1 and improved manufacturing efficiency.

[0118] In the control valve 5 of this embodiment, the number of inlet circuits 71a-71g is greater than the number of inlets 41c-41e. The number of outlet circuits 72a-72e is fewer than the number of outlet circuits 71a-71g. The third outlet circuit 72c is connected to the third inlet circuit 71c and the seventh inlet circuit 71g. The fourth outlet circuit 72d is connected to the fourth inlet circuit 71d and the sixth inlet circuit 71f. With this configuration, since the number of inlet circuits 71a-71g is greater than the number of inlets 41c-41e, more flow patterns can be selected than the number of inlets 41c-41e. Therefore, the coolant flows between the inlets 41c-41e and the inlet circuits 71a-71g, which are connected via the through holes 85b-85d. The coolant is then supplied to the outside of the control valve 5 via the outlet circuits 72a-72e and the outlets 51c-51e. In this way, by switching the communication between the inlet circuits 71a-71g, which are formed in greater numbers than the number of inlets 41c-41e, and the inlets 41c-41e by rotating the valve body 22, if there are as many inlets 41c-41e and outlets 51c-51e as there are flow paths to be temperature-controlled, it is possible to switch between more flow patterns than the inlets 41c-41e and outlets 51c-51e using the switching mechanism (valve body 22 and distribution member 33). Therefore, compared to cases where piping corresponding to the number of coolant flow patterns is provided outside the control valve or where multiple control valves are provided on the cooling system 1, it is possible to reduce the size of the cooling system 1 and the number of control valves.

[0119] In the control valve 5 of this embodiment, the third outflow circuit 72c is configured to connect the third inflow circuit 71c and the seventh inflow circuit 71g, which are positioned opposite each other in the radial direction. With this configuration, connecting the third inflow circuit 71c and the seventh inflow circuit 71g, which are positioned opposite each other in the second radial direction L2, on the back side of the distributor plate 60 improves the degree of circuit flexibility compared to connecting multiple inflow circuits on the front side of the distributor plate 60. This prevents the distributor member 33 from becoming larger, even when multiple connection circuits 75a to 75e are provided in the distributor member 33 according to the flow patterns. In this case, for example, connecting the third inflow circuit 71c and the seventh inflow circuit 71g, which are positioned opposite each other in the second radial direction L2, via the third outflow circuit 72c can reduce the size of the control valve 5 compared to connecting inflow circuits distributed in two different directions (the first radial direction L1 and the second radial direction L2).

[0120] In the control valve 5 of this embodiment, the valve element 22 can be stopped at a plurality of stop positions with different rotation angles. The product of the number of through holes 85b-85d and the number of stop positions of the valve element 22 is configured to be greater than the total number of inlets 41c-41e and the total number of inlet circuits 71a-71g. This configuration allows the valve element 22 to be more compact than when the valve element 22 is formed with the same number of through holes 85b-85d as the inlet circuits 71a-71g. This allows the control valve 5 to be further miniaturized.

[0121] In the control valve 5 of this embodiment, the distributor member 33 is configured to include a distributor plate 60. The distributor plate 60 has a front surface (first surface) on which the inlet circuits 71a to 71g open and a back surface (second surface) on which the outlet circuits 72a to 72e open. This configuration allows for a reduction in size of the control valve 5, particularly in the axial direction, compared to a configuration in which the inlet circuits 71a to 71g and the outlet circuits 72a to 72e are formed by separate members.

[0122] In the control valve 5 of this embodiment, the distributor 33 has a plurality of connection ports 61a to 62e and includes an intermediate plate 61 disposed between the distributor plate 60 and the second housing 32. The second outlet 51d and the third outlet 51e (linear openings) extend linearly in the first radial direction L1 (second direction). The second outlet 51d is connected to the first connection port 61a and the fourth connection port 61d. The third outlet 51e is connected to the second connection port 61b and the third connection port 61c. With this configuration, the intermediate plate 61 is disposed between the distributor plate 60 and the second housing 32, so that the outlet circuits 72a to 72e and the connection ports 61a to 61e are interposed between the inlet circuits 71a to 71g and the outlets 51c to 51e. In this case, for example, the outflow circuits 72a to 72e can be designed to match the positions and shapes of the inflow circuits 71a to 71g, and the connection ports 61a to 61e can be designed to match the positions and shapes of the outflow ports 51c to 51e. As a result, the degree of freedom in the circuitry can be improved compared to when the outflow circuits 72a to 72e of the distributor plate 60 are directly connected to the outflow ports 51c to 51e of the second housing 32. Furthermore, when connecting the connection ports 61a to 61e to the outflow ports 51c to 51e, the control valve 5 can be made smaller, particularly in the second radial direction L2, compared to when, for example, the second outflow port 51d and the third outflow port 51e are formed in a circular shape extending in the first radial direction L1 and the second radial direction L2.

[0123] In the control valve 5 of this embodiment, the valve element 22 includes a rotor (disk portion) 85 having through holes 85b to 85d formed therein and a protrusion 86 protruding axially from the rotor 85. The distributor plate 60 is configured to have a pair of stopper walls 83 that face each other in the circumferential direction across the protrusion 86 and abut against the protrusion 86 to limit the rotation of the valve element 22 within a predetermined range. With this configuration, for example, when the control valve 5 starts to operate, the protrusion 86 abuts against one of the stopper walls 83, thereby enabling the drive unit 24 (actuator 120) to be set to an initial position. This reduces misalignment between the through holes 85b to 85d and the inflow circuits 71a to 71g when the valve element 22 is in each stop position, thereby improving the reliability of the control valve 5.

[0124] (Modification) In the above-described embodiment, the cooling system 1 is configured such that the control valve 5 and the pumps 6, 10 are provided separately, but this configuration is not limiting. For example, as shown in Fig. 25, an integrated unit 200 in which the control valve 5 and the pumps 6, 10 are integrated may be employed. In the integrated unit 200, the control valve 5 and the pumps 6, 10 are arranged side by side on a plane that intersects with the axial direction.

[0125] In the integrated unit 200 of this embodiment, a first pump stay 201 and a second pump stay 202 extending in a direction intersecting the axial direction are integrally formed with the second housing 32 of the control valve 5. The first pump stay 201 and the second pump stay 202 are disposed on a first side in the first radial direction L1 with respect to the second housing 32 and side by side in the second radial direction L2. A first pump 6 is assembled to the first pump stay 201. The first pump 6 is connected to a flow path between the distribution member 33 and the first outlet port 53 and delivers coolant toward the first outlet port 53. A second pump 10 is assembled to the second pump stay 202. The second pump 10 is connected to a flow path between the distribution member 33 and the second outlet port 54 and delivers coolant toward the second outlet port 54.

[0126] In this way, by integrating the control valve 5 and the pumps 6 and 10, the cooling system 1 can be further reduced in size.

[0127] (Other Modifications) While preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to these embodiments. Additions, omissions, substitutions, and other modifications to the configuration are possible without departing from the spirit of the present disclosure. The present disclosure is not limited by the above description, but is limited only by the appended claims. For example, in the above-described embodiment, the control valve 5 is described as being installed in a vehicle cooling system 1. However, the present disclosure is not limited to this configuration and may be installed in other systems. In the above-described embodiment, a configuration in which three inlets 41c-41e and three outlets 51c-51e are provided (a so-called 3-in-3-out configuration) is described. However, the present disclosure is not limited to this configuration. The number of inlets 41c-41e and outlets 51c-51e may be different. Furthermore, the number of inlet circuits 71a-71g, outlet circuits 72a-72e, and passage holes 85b-85d can also be modified as appropriate. For example, if the number of outlets is greater than the number of inlets, the coolant may be diverged as it passes through the distributor. In the above-described embodiment, a configuration in which the number of inlet circuits (first circuits) is greater than the number of outlet circuits has been described, but this configuration is not limited thereto. Alternatively, the number of inlet circuits may be fewer than the number of outlet circuits (there may be more outlet circuits). In the above-described embodiment, a configuration in which the first openings are inlet ports 41c-41e and the second openings are outlet ports 51c-51e has been described, but this configuration is not limited thereto. The first openings may be outlet ports and the second openings may be inlet ports. In this case, the coolant flowing in from the inlet port passes through the second circuit, the first circuit, and the through hole in that order as it passes through the distributor 33 and the valve body 22.

[0128] In the above-described embodiment, a configuration in which the valve element 22 includes a disk-shaped rotor 85 has been described, but this configuration is not limited thereto. The rotor 85 is not limited to a disk shape, and may be a rectangular plate, conical, cylindrical, or other shape. In the above-described embodiment, a configuration in which the inlets 41c to 41e and the passage holes 85b to 85d are blocked by the sealing mechanism 23 has been described, but the sealing mechanism 23 is not an essential component. Furthermore, the sealing mechanisms 23 are not limited to being separate, and may be integrally formed with the inlets 41c to 41d separated from one another.

[0129] In the above-described embodiment, a configuration in which the coolant flow pattern is switched between the battery flow path 2, the drive flow path 3, and the radiator flow path 4 has been described, but this configuration is not limiting. The flow paths connected to the control valve 5 can be changed as appropriate. In the above-described embodiment, a configuration in which the product of the number of passing holes 85b to 85d and the number of stopping positions of the valve body 22 is greater than the total number of inlet circuits 71a to 71g has been described, but this configuration is not limiting. The number of passing holes 85b to 85d may be equal to or less than the number of inlet circuits 71a to 71g.

[0130] In the above-described embodiment, a configuration has been described in which the first housing 31 and the distribution plate 60 are assembled from the back side, and the second housing 32 and the distribution plate 60 are assembled from the front side, but this configuration is not limited thereto. The first housing 31 and the second housing 32 may be assembled integrally to the distribution plate 60. Alternatively, the first housing 31 and the distribution plate 60 may be assembled from the front side, and the second housing 32 and the distribution plate 60 may be assembled from the back side. Alternatively, at least one of the first housing 31 and the distribution plate 60 and the second housing 32 and the distribution plate 60 may be fixed together by a method other than fastening (e.g., welding, etc.). In the above-described embodiment, a configuration has been described in which the ports extend radially, but this configuration is not limited thereto. At least one of the ports may extend, for example, in an axial direction or a direction intersecting the radial direction.

[0131] In the above-described embodiment, the inlet circuits 71a to 71g and the outlet circuits 72a to 72e are formed on the front and back surfaces of the distributor plate 60, but this configuration is not limiting. The inlet circuits 71a to 71g and the outlet circuits 72a to 72e may be formed as separate members. In the above-described embodiment, the distributor member 33 is formed by the distributor plate 60 and the intermediate plate 61, but the distributor member 33 may be formed by one plate, or by three or more plates.

[0132] In addition, within the scope of the present disclosure, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described modified examples may be combined as appropriate.

[0133] 5: Control valve 22: Valve element (switching mechanism) 31: First housing 32: Second housing 33: Distributor member 41c: First inlet (first opening) 41d: Second inlet (first opening) 41e: Third inlet (first opening) 53c: First outlet (second opening) 53d: Second outlet (second opening) 53e: Third outlet (second opening) 60: Distributor plate (distributor member, switching mechanism) 61: Intermediate plate (distributor member, switching mechanism) 61a: First connection port (connection port) 61b: Second connection port (connection port) 61c: Third connection port (connection port) 61d: Fourth connection port (connection port) 61e: Fifth connection port (connection port) 71a: First inlet circuit (first circuit) 71b: Second inlet circuit (first circuit) 71c: Third inlet circuit (first circuit) 71d: Fourth inlet circuit (first circuit) 71e: Fifth inlet circuit (first circuit) 71f: Sixth inlet circuit (first circuit) 71g: Seventh inlet circuit (first circuit) 72a: First outlet circuit (second circuit) 72b: Second outlet circuit (second circuit) 72c: Third outlet circuit (second circuit) 72d: Fourth outlet circuit (second circuit) 72e: Fifth outlet circuit (second circuit) 75a: First connection circuit (circuit) 75b: Second connection circuit (circuit) 75c: Third connection circuit (circuit) 75d: Fourth connection circuit (circuit) 75e: Fifth connection circuit (circuit) 83: Stopper wall 85b: First through hole (through hole) 85c: Second through hole (through hole) 85d: Third through hole (through hole) 86: Projection

Claims

1. A valve disc comprising: a first housing having a plurality of first openings formed therein through which a fluid passes; a second housing arranged opposite the first housing in a first direction and having a plurality of second openings formed therein through which a fluid passes; and a switching mechanism arranged between the first housing and the second housing in the first direction and for switching circuits connecting the plurality of first openings and the plurality of second openings, wherein the switching mechanism comprises: a valve disc having a plurality of passing holes formed at intervals in the circumferential direction around an axis along the first direction and which rotates around the axis; and a distribution member arranged between the valve disc and the second housing in the first direction, wherein the distribution member has a plurality of first circuits formed in a number different from the number of first openings at positions facing the valve disc in the first direction so that communication with any of the first openings through any of the passing holes can be switched on and off as the valve disc rotates. a control valve including: a plurality of second circuits formed in a different number from the plurality of first circuits at a position facing the second housing in the first direction so that at least any of the plurality of first circuits is in communication with each other, and so that the second circuits are in communication with any of the plurality of second openings.

2. A control valve as set forth in claim 1, wherein the number of said first circuits is greater than the number of said first openings, the number of said second circuits is less than the number of said first circuits, and any of said second circuits among said plurality of second circuits is in communication with a plurality of said first circuits.

3. A control valve as described in claim 2, wherein any one of the second circuits connects the first circuits, among the plurality of first circuits, that are arranged at positions facing each other in a direction intersecting the first direction.

4. A control valve as claimed in any one of claims 1 to 3, wherein the valve element can be stopped at a plurality of stop positions with different rotation angles, and the product of the number of passage holes and the number of stop positions is greater than the total number of first circuits.

5. A control valve as claimed in any one of claims 1 to 3, wherein the distributor member comprises a distributor plate having a first surface on which the first circuit opens and which faces the first housing in the first direction, and a second surface on which the second circuit opens and which faces the second housing in the first direction.

6. A control valve as described in claim 5, wherein the distribution member has a plurality of connection ports that respectively communicate with the plurality of second circuits and communicate with any of the second openings, and an intermediate plate is provided between the distribution plate and the second housing, and any of the plurality of second openings forms a linear opening that extends linearly in a second direction that intersects with the first direction, and any of the plurality of connection ports communicates with the linear opening at positions spaced apart in the second direction.

7. A control valve as claimed in any one of claims 1 to 3, wherein the valve body comprises a disc portion in which the passage hole is formed, and a protrusion protruding from the disc portion in the first direction, and the distribution member is formed with a pair of stopper walls which face each other in the circumferential direction around the axis across the protrusion and abut against the protrusion, thereby limiting the rotation of the valve body within a predetermined range.

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