JP2023174482A - Flow passage switching device and heat medium circulation system - Google Patents

Abstract

To promote size reduction and cost reduction, in a flow passage switching device which is achieved in all of combinations in which communication patterns in a plurality of direction valves are different from one another.SOLUTION: A flow passage switching device 30 comprises a direction switching motor 31, a rotating shaft 32 changed in a rotation angle, and a first four-way valve 22, a second four-way valve 23 and a second three-way valve 24 which are rotated in conjunction with the rotation of the rotating shaft 32, and form any communication pattern by rotation angles of rotating parts 22R, 23R and 24R. The rotating parts 22R, 23R and 24R rotate at the same rotational speed by the rotation of the rotating shaft 32, and are constituted so that at least either of a rotation angle of the rotating shaft 32 by which communication patterns of the first four-way valve 22, the second four-way valve 23 and the second three-way valve 24 are switched, and a rotation angle range of the rotating shaft 32 which forms each communication pattern differs from each other. Then, by the control of the rotation angle of the rotating shaft 32 by a control part, all combinations at which the communication patterns differ from one another can be achieved.SELECTED DRAWING: Figure 2

Description

The present invention relates to a flow path switching device including a plurality of directional valves for switching flow paths, and a heat medium circulation system.

For example, in vehicles such as electric cars, cooling is used as a heat medium to cool the heat-generating parts such as the rotating electric machine (motor/generator) and battery that drive the vehicle, or to warm up each part. It is equipped with multiple circulation paths to circulate water. In such a plurality of circulation paths, the flow path of the cooling water is required to be changed depending on the state that requires cooling or the state that requires warming up. For this reason, a flow path switching device that switches the flow paths using a plurality of rotary valves has been proposed (see, for example, Patent Document 1).

JP2013-238310A

By the way, as the number of heat generating parts mounted on a vehicle increases, the number of circulation paths for circulating cooling water also increases, and the number of directional valves that switch the flow paths also increases, so the motor that drives these directional valves increases. The number of drivers and driver circuits also increases, which impedes miniaturization and cost reduction.

Therefore, in the flow path switching device of Patent Document 1, the rotation of a single drive source (22) is transmitted to each rotary valve by changing the speed at a different gear ratio in the drive mechanism (21). A plurality of flow path patterns are achieved by making the rotation periods different from each other and thereby controlling the communication/blocking of the ports of each rotary valve. However, in order to vary the rotation period, the drive mechanism is complicated by using gears with different gear ratios, etc., which hinders miniaturization and cost reduction.

Therefore, the present invention provides a flow path switching device and a heat medium circulation system for a vehicle that achieve all combinations in which the communication patterns of a plurality of directional valves are different from each other, and that can achieve downsizing and cost reduction. The purpose is to provide

One aspect of the present invention is
In the flow path switching device,
A rotating electric machine that outputs rotation,
a rotating member whose rotation angle is changed by rotation of the rotating electrical machine;
At least one communication path is formed that is rotated in conjunction with the rotation of the rotating member, is disposed so as to be interposed between the plurality of flow paths, and is capable of communicating two flow paths among the plurality of flow paths. a plurality of directional valves having a rotating part and forming a plurality of different communication patterns in which any one of the plurality of flow paths is communicated through the communication path depending on a rotation angle of the rotating part;
A control unit that controls the rotating electric machine,
The rotating parts of each of the plurality of directional valves rotate at the same rotational speed due to rotation of the rotating member,
In each of the plurality of directional valves, at least one of the rotation angle of the rotary member at which communication patterns are switched among the plurality of communication patterns and the rotation angle range of the rotary member forming each communication pattern are mutually different. configured differently,
The control unit controls the rotating electrical machine to control the rotation angle of the rotating member, thereby achieving all combinations in which the communication patterns in the plurality of directional valves are different from each other.

Further, one aspect of the present invention is
In the flow path switching device,
A rotating electric machine that outputs rotation,
a rotating member whose rotation angle is changed by rotation of the rotating electrical machine;
At least one communication path is formed that is rotated in conjunction with the rotation of the rotating member, is disposed so as to be interposed between the plurality of flow paths, and is capable of communicating two flow paths among the plurality of flow paths. A different pattern comprising a rotating part, and including a pattern in which any of the plurality of channels is communicated by the communication path and a pattern in which any of the plurality of channels is blocked depending on the rotation angle of the rotating part. a plurality of directional valves forming a plurality of communication patterns;
A control unit that controls the rotating electric machine,
The rotating parts of each of the plurality of directional valves rotate at the same rotational speed due to rotation of the rotating member,
In each of the plurality of directional valves, at least one of the rotation angle of the rotary member at which communication patterns are switched among the plurality of communication patterns and the rotation angle range of the rotary member forming each communication pattern are mutually different. configured differently,
The control unit controls the rotating electrical machine to control the rotation angle of the rotating member, thereby achieving all combinations in which the communication patterns in the plurality of directional valves are different from each other.

According to the present invention, it is possible to achieve all combinations in which the communication patterns of a plurality of directional valves are different from each other, and to achieve miniaturization and cost reduction.

FIG. 1 is a schematic diagram showing a heat medium circulation system for a vehicle according to a first embodiment. (a) is a schematic diagram showing a flow path switching device according to the first embodiment, and (b) is a schematic diagram showing the angle of the rotation axis and the communication pattern of each directional valve in the flow path switching device according to the first embodiment. A diagram showing the relationship between 5 is a flowchart showing channel switching control according to the first embodiment. FIG. 3 is a schematic diagram showing a flow path switching device according to a second embodiment. (a) is a schematic diagram showing a flow path switching device according to the third embodiment, and (b) is a schematic diagram showing the angle of the rotation axis and the communication pattern of each directional valve in the flow path switching device according to the third embodiment. A diagram showing the relationship between (a) is a schematic diagram showing a flow path switching device according to the fourth embodiment, and (b) is a schematic diagram showing the angle of the rotation axis and the communication pattern of each directional valve in the flow path switching device according to the fourth embodiment. A diagram showing the relationship between (a) is a schematic diagram showing a flow path switching device according to the fifth embodiment, and (b) is a schematic diagram showing the angle of the rotation axis and the communication pattern of each directional valve in the flow path switching device according to the fifth embodiment. A diagram showing the relationship between FIG. 7 is a schematic diagram showing a part of a heat medium circulation system for a vehicle according to a sixth embodiment. (a) is a schematic diagram showing a flow path switching device according to the sixth embodiment, and (b) is a schematic diagram showing the angle of the rotation axis and the communication pattern of each directional valve in the flow path switching device according to the sixth embodiment. A diagram showing the relationship between FIG. 7 is a schematic diagram showing a part of a vehicle heat medium circulation system according to a seventh embodiment. (a) is a schematic diagram showing a flow path switching device according to the seventh embodiment, and (b) is a schematic diagram showing the angle of the rotation axis and the communication pattern of each directional valve in the flow path switching device according to the seventh embodiment. A diagram showing the relationship between FIG. 7 is a schematic diagram showing a part of a heat medium circulation system for a vehicle according to an eighth embodiment. (a) is a schematic diagram showing a flow path switching device according to the eighth embodiment, and (b) is a schematic diagram showing the angle of the rotation axis and the communication pattern of each directional valve in the flow path switching device according to the eighth embodiment. A diagram showing the relationship between (a) is a schematic diagram showing a flow path switching device according to the ninth embodiment, and (b) is a schematic diagram showing the angle of the rotation axis and the communication pattern of each directional valve in the flow path switching device according to the ninth embodiment. A diagram showing the relationship between

<First embodiment>
Hereinafter, a heat medium circulation system for a vehicle and a flow path switching device according to a first embodiment will be described using FIGS. 1 to 3.

[Configuration of vehicle heat medium circulation system]
First, a schematic configuration of a vehicle heat medium circulation system will be described using FIG. 1. FIG. 1 is a schematic diagram showing a heat medium circulation system for a vehicle according to a first embodiment.

As shown in FIG. 1, a vehicle 1, which is an electric vehicle, for example, includes a radiator 3 that cools cooling water, which is a heat medium and a fluid, by exchanging heat with outside air, and a heater 4 that can heat the cooling water. A driving rotating electrical machine (hereinafter referred to as "motor") 5 that outputs the driving force of the vehicle 1 and transmits it to wheels (not shown), and a battery 6 that stores electric power to be supplied to the motor 5 are provided. The heater 4, motor 5, and battery 6 are heat-generating parts that generate heat when current flows through them, and are cooled as necessary, but may also need to be warmed up. In particular, the battery 6 may be warmed up so that it can operate normally at low temperatures. Furthermore, in this embodiment, water, which is a fluid and a heat medium, is called cooling water mainly because of its function of absorbing heat and cooling it, but it also has a function of imparting heat during warm-up.

The vehicle 1 includes a heat medium circulation system 10 that allows cooling water to flow and circulate through a radiator 3, a heater 4, a motor 5, and a battery 6, a directional valve switching motor 31, which will be described later, and a first three-way valve 21. and a control section 50 that controls the first four-way valve 22, the second four-way valve 23, and the second three-way valve 24. The heat medium circulation system 10 includes a first circulation path 11 that passes through the heater 4 , a second circulation path 12 that passes through the motor 5 , and a first circulation path that passes through the radiator 3 as circulation paths through which cooling water can circulate. It has a third circulation path 13 as a path, and a fourth circulation path 14 as a second circulation path passing through the battery 6, and is further arranged to be interposed in the third circulation path 13. It has a first pump WP1 and a second pump WP2 disposed so as to be interposed in the fourth circulation path 14, and the rotation of the first pump WP1 and the second pump WP2 is controlled by the control unit 50. It is driven by

Furthermore, the heat medium circulation system 10 includes a first three-way valve 21, a first four-way valve 22, a second four-way valve 23, and a second three-way valve 24. The first three-way valve 21 cuts off and short-circuits the first circulation path 11 and the third circulation path 13 (arrow A1), and the first three-way valve 21 separates the first circulation path 11 and the third circulation path 13 from each other. The communication state (arrow A2 and arrow A3) of communication is switchable. Similarly, the first four-way valve 22 cuts off and short-circuits between the second circulation path 12 and the third circulation path 13 (arrow B1 and arrow B3), and the second circulation path 12 and the third circulation path 13 are connected to each other. The communication state (arrow B2 and arrow B4) in which the third circulation path 13 is communicated with is configured to be switchable. Furthermore, in the same way, the second four-way valve 23 cuts off between the third circulation path 13 and the fourth circulation path 14 and short-circuits them (arrow C2 and arrow C4), and the third circulation path 13 and the fourth circulation path 14 The communication state (arrow C1 and arrow C3) of communicating with the fourth circulation path 14 is configured to be switchable. The second three-way valve 24 also operates in a circulating state (second output state described later) (arrow D2) in which cooling water is circulated to the radiator 3 in the third circulation path 13 and in a non-circulating state (indicated by arrow D2) in which the cooling water is not circulated in the radiator 3. A first output state (to be described later) (arrow D1) is configured to be switchable. These first three-way valve 21, first four-way valve 22, second four-way valve 23, and second three-way valve 24 are operated by the control unit 50, which rotates the angle of the passage by a drive mechanism (not shown). A circulating state or a non-circulating state, or a short circuit state or a communication state is switched.

Specifically, the first circulation path 11 includes a flow path 11a that communicates from the heater 4 to the flow path 13f of the third circulation path 13, and a flow path 11b that communicates from the port 21b of the first three-way valve 21 to the heater 4. It has . The second circulation path 12 also includes a flow path 12a that communicates from the motor 5 to the port 22d of the second four-way valve 22, and a flow path 12b that communicates from the port 22c of the second four-way valve 22 to the motor 5. have. The third circulation path 13 communicates with a flow path 13a that communicates from the first pump WP1 to the port 23a of the second four-way valve 23, and from the port 23b of the second four-way valve 23 to the port 24a of the second three-way valve 24. A flow path 13b, a flow path 13c that communicates from the port 24c of the second three-way valve 24 to the port 21a of the first three-way valve 21, and a flow path 13d that communicates from the port 24b of the second three-way valve 24 to the radiator 3. , a flow path 13e communicating from the radiator 3 to the flow path 13c, a flow path 13f communicating from the port 21c of the first three-way valve 21 to the port 22a of the first four-way valve 22, and a port 22b of the first four-way valve 22. and a flow path 13g that communicates from the first pump WP1 to the first pump WP1. The fourth circulation path 14 includes a flow path 14a that communicates from the battery 6 to the second pump WP2, a flow path 14b that communicates from the second pump WP2 to the port 23c of the second four-way valve 23, and a second four-way valve 23. It has a flow path 14c that communicates from the port 23d of the valve 23 to the battery 6.

Note that the ports 22a, 22b, 22c, 22d and the ports 23a, 23b, 23c, 23d shown in FIG. 1 are formed into two parts as will be described in detail later (see FIG. 2(a)). The ports 24a and 24b are formed into four parts as described later in detail (see FIG. 2(a)), but are shown in a simplified manner in FIG. 1 for convenience of explanation.

[Operation of heat medium circulation system]
Next, the operation of the heat medium circulation system 10 will be explained. In the cooling state in which the motor 5 and/or the battery 6 is cooled, the second three-way valve 24 is rotationally controlled to a position where the communication passage 24A communicates the ports 24a and 24b, and the second three-way valve 24 is in the circulating state (as indicated by the arrow D2). In addition, by controlling and driving the first pump WP1, pressure is applied to the cooling water, which is the fluid in the third circulation path 13, and the cooling water is swept away, so that the third circulation path 13 is connected to the first circulation path 11. , through the flow paths 13a, 13b, 13d, 13e, 13f, and 13g in the third circulation path 13, regardless of whether they are in communication with each of the second circulation path 12 and the fourth circulation path 14 or in a short-circuited state. Cooling water circulates through the radiator 3. Thereby, the cooling water circulating in the third circulation path 13 is cooled by the radiator 3. In addition, in this cooling state, it is preferable that the first three-way valve 21 is placed in a short-circuit state (arrow A1) in which the first circulation path 11 and the third circulation path 13 are cut off and they are short-circuited.

In a state where the cooling water circulates through the radiator 3 in the third circulation path 13, the first four-way valve 22 is connected to the communication path 22A (or communication path 22B) which communicates between the ports 22a and the port 22c, and the communication path 22B (or the communication path 22B). The passage 22A) is rotated to a position where the port 22d and the port 22b communicate with each other, and the first four-way valve 22 is placed in a communicating state (arrow B2 and arrow B4). Then, the cooling water in the third circulation path 13 that has been cooled by the radiator 3 circulates around the motor 5 in the second circulation path 12 through the flow paths 12b and 12a. Thereby, the motor 5 can be cooled.

In addition, when cooling the motor 5 is not necessary, the first four-way valve 22 is configured such that the communication passage 22A (or communication passage 22B) communicates between the ports 22a and the port 22b, and the communication passage 22B (or the communication passage 22A) communicates with the port 22a and the port 22b. 22d and port 22c are rotated to a position where they communicate with each other, and the first four-way valve 22 is brought into a short-circuited state (arrow B1 and arrow B3). Then, the cooling water in the third circulation path 13 is not supplied to the second circulation path 12, and cooling of the motor 5 can be stopped.

Similarly, in a state in which the cooling water circulates through the radiator 3 in the third circulation path 13, the third four-way valve 23 is connected to the communication path 23A (or the communication path 23B), which communicates between the port 23a and the port 23d, and the communication path 23B. (or the communication path 23A) is rotated to a position where the port 23c and the port 23b communicate with each other, and the second four-way valve 23 is brought into communication state (arrow C1 and arrow C3). Then, the cooling water in the third circulation path 13 that has been cooled by the radiator 3 circulates around the battery 6 in the fourth circulation path 14 through channels 14c, 14a, and 14b. In addition, at this time, by driving the second pump WP2 under line control, pressure is applied to the cooling water, which is the fluid in the fourth circulation path 14, and the cooling water is swept away, increasing the flow rate of the fourth circulation path 14. By doing so, the battery 6 can be efficiently cooled.

In addition, when cooling the battery 6 is not necessary, the second four-way valve 23 is configured so that the communication passage 23A (or communication passage 23B) communicates with the port 23a and the port 23b, and the communication passage 23B (or communication passage 23A) communicates with the port 23c and port 23d are rotated to a position where they communicate with each other, and the second four-way valve 23 is brought into a short-circuited state (arrow C2 and arrow C4). Then, the cooling water in the third circulation path 13 is not supplied to the fourth circulation path 14, and cooling of the battery 6 can be stopped. Furthermore, cooling of the battery 6 can be continued by circulating the cooling water in the fourth circulation path 14 by driving the second pump WP2.

On the other hand, in a warm-up state in which the motor 5 and/or the battery 6 are warmed up, the second three-way valve 24 is controlled to rotate to a position where the communication passage 24A communicates the port 24a and the port 24c. A non-circulating state (arrow D1) is established. In addition, by controlling and driving the first pump WP1, it is possible to determine whether the third circulation path 13 is in communication with each of the first circulation path 11, the second circulation path 12, and the fourth circulation path 14 or in a short-circuit state. Regardless of whether this is the case, the cooling water circulates in the third circulation path 13 through the flow paths 13a, 13b, 13c, 13f, and 13g so as not to pass through the radiator 3. This prevents the cooling water circulating through the third circulation path 13 from being cooled by the radiator 3.

Further, while the cooling water is not circulating through the radiator 3 in the third circulation path 13, the first three-way valve 21 is controlled to rotate to a position where the communication path 21A communicates the port 21a and the port 21b. into a communicating state (arrow A2 and arrow A3). Then, the cooling water in the third circulation path 13 circulates around the heater 4 in the first circulation path 11 through the flow paths 11b and 11a. Thereby, the cooling water passing through the first circulation path 11 can be heated by the heater 4, and the temperature of the cooling water can be increased.

In this state where the first circulation path 11 and the third circulation path 13 are communicated with each other, when the third circulation path 13 and the second circulation path 12 are communicated with each other by the first four-way valve 22 as described above, the heater 4 The heated cooling water can be circulated to the motor 5, and the motor 5 can be warmed up. Furthermore, if warming up of the motor 5 is not necessary, warming up of the motor 5 can be stopped by blocking the third circulation path 13 and the second circulation path 12 using the first four-way valve 22.

Similarly, when the first circulation path 11 and the third circulation path 13 are connected to each other and the third circulation path 13 and the fourth circulation path 14 are connected to each other by the second four-way valve 23 as described above, the heater 4 The heated cooling water can be circulated to the battery 6, and the battery 6 can be warmed up. At this time, by driving the second pump WP2 under line control to increase the flow rate of the fourth circulation path 14, the battery 6 can be efficiently warmed up. Further, when warming up the battery 6 is not necessary, warming up the battery 6 can be stopped by blocking the third circulation path 13 and the fourth circulation path 14 using the second four-way valve 23. At this time, warming up of the battery 6 can also be continued by circulating the cooling water in the fourth circulation path 14 by driving the second pump WP2.

Then, as the motor 5 and/or battery 6 warms up, the rotation of the first three-way valve 21 is controlled to a position where the communication path 21A communicates the ports 21a and 21c, and the first three-way valve 21 is brought into a short-circuited state. (arrow A1). That is, since the motor 5 and battery 6 themselves also generate heat, it is possible to shift to a warm-up state without using the heater 4.

[Configuration of flow path switching device]
Next, the configuration of the flow path switching device 30 according to the first embodiment will be explained using FIG. 2. FIG. 2(a) is a schematic diagram showing the flow path switching device according to the first embodiment, and FIG. 2(b) is a schematic diagram showing the angle of the rotation axis and each direction in the flow path switching device according to the first embodiment. It is a figure which shows the relationship with the communication pattern of a valve.

The flow path switching device 30 according to the first embodiment includes the first four-way valve 22 (first direction valve), the second four-way valve 23 (second direction valve), and the second three-way valve 24 (third direction valve). The three directional valves (valve) are rotationally driven by one (single) directional valve switching motor 31. In this first embodiment, the description of the first three-way valve 21 is omitted as it is rotatably driven by another directional valve switching motor (not shown), and the first four-way valve 22, the second four-way valve 23, and The flow path switching device 30 that drives the second three-way valve 24 will be explained.

As shown in FIG. 2(a), the flow path switching device 30 includes a directional valve switching motor 31 as a rotating electric machine, and a rotating member that is driven and connected to a rotor (not shown) of the directional valve switching motor 31 to rotate. The first four-way valve 22, the second four-way valve 23, and the second three-way valve 24 are provided. The directional valve switching motor 31 is constituted by, for example, a stepping motor or the like that can control the rotation angle of the rotating shaft 32 by controlling the rotation angle by the control unit 50 . Note that a configuration may also be adopted in which a rotation angle sensor for detecting the rotation angle of the rotation shaft 32 is provided and the rotation angle of the rotation shaft 32 is controlled by the directional valve switching motor 31 while performing feedback control.

The first four-way valve 22 has a rotating portion 22R in which the communicating path 22A and the communicating path 22B are formed, and the second four-way valve 23 has a rotating portion 22R in which the communicating path 23A and the communicating path 23B are formed. The second three-way valve 24 further has a rotating portion 24R in which the communication passage 24A is formed. The rotating part 22R, the rotating part 23R, and the rotating part 24R in these three directional valves form a plurality of different communication patterns in which any one of the plurality of flow paths is communicated by a communication path. The rotating part 22R, the rotating part 23R, and the rotating part 24R in these three directional valves are driven and connected at their centers by the rotating shaft 32, that is, they are rotated in conjunction with the rotation of the rotating shaft 32, and rotate at the same rotation rate. Rotate at speed. Note that these rotating parts 22R, 23R, and 24R may be drive-connected to the rotating shaft 32 through gears, chains, etc., but if they have the same gear ratio and the same rotational speed, It is preferable that the drive connection be made such that

Ports 22a1, 22a2, 22b1, 22b2, 22c1, 22c2, 22d1, 22d2 are formed in the first four-way valve 22 at eight equal positions in the circumferential direction, that is, at intervals of 45 degrees. . Of these, the ports 22a1 and 22a2 are formed into two parts with the same port function, and are connected to each other in a manner that the flow path 13f is branched. Similarly, the ports 22b1 and 22b2 are formed into two parts to function as the same port, and are connected in a branched manner with the flow path 13g. Similarly, the ports 22c1 and 22c2 are formed into two parts to function as the same port, and are connected in a branched manner with the flow path 12b. Similarly, the ports 22d1 and 22d2 are also formed into two parts with the same port function, and are connected in a branched manner with the flow path 12a.

Further, the second four-way valve 23 also has ports 23a1, 23a2, 23b1, 23b2, 23c1, 23c2, 23d1, and 23d2 formed at eight equal positions in the circumferential direction, that is, at intervals of 45 degrees. ing. Among these ports, the ports 23a1 and 23a2 are formed into two parts with the same port function, and are connected in a branched manner with the flow path 13a. Similarly, the ports 23b1 and 23b2 are formed into two parts to function as the same port, and are connected in a branched manner with the flow path 13b. Similarly, the ports 23c1 and 23c2 are formed into two parts to function as the same port, and are connected in a branched manner with the flow path 14b. Similarly, the ports 23d1 and 23d2 are also formed into two parts with the same port function, and are connected in a branched manner with the flow path 14c.

Further, the second three-way valve 24 also has ports 24b1, 24b2, 24b3, 24b4, 24c1, 24c2, 24c3, and 24c4 formed at eight equal positions in the circumferential direction, that is, at intervals of 45 degrees. ing. Among these ports, the ports 24b1, 24b2, 24b3, and 24b4 are divided into four and are formed to function as the same port, and are connected in a branched manner with the flow path 13d. Similarly, the ports 24c1, 24c2, 24c3, and 24c4 are formed into four separate ports with the same port function, and are connected in a branched manner with the flow path 13c.

The rotating portion 22R of the first four-way valve 22 has a communication path 22A that communicates between the port 22a1 and the port 22b1 when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees. The passage 22B is installed at a position where the ports 22c1 and 22d1 communicate with each other. In other words, in the rotating part 22R, each communication path (for example, 22A) is connected to the upstream port (for example, 22c1) in the clockwise rotation direction in the figure of the two ports separated from the flow path (for example, 13f) as the home position. installed in the correct position.

With this configuration, the first four-way valve 22 can combine each of the above-mentioned short circuit state (first communication pattern) and communication state (second communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (including a pattern that communicates the flow path and a pattern that short-circuits the flow path), the angle range that forms the communication pattern (short-circuit state or communication state) is a rotation angle range of 90 degrees (first rotation angle range) And the rotation angle (first rotation angle) at which the communication pattern (communication and short circuit) is switched is set to be 0 degrees, 90 degrees, 180 degrees, and 270 degrees (see FIG. 2(b)). In other words, the first four-way valve 22 is set so that the communication pattern (short-circuit state or communication state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle).

Further, in the rotating part 23R of the second four-way valve 23, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 23A communicates between the port 23a2 and the port 23b2. At the same time, the communication path 23B is installed at a position where the ports 23c2 and 23d2 communicate with each other. In other words, the rotating part 23R has a home position where the downstream port (for example, 23a2) in the clockwise rotational direction in the figure of the two ports separated from each flow path (for example, 13a) is connected to each communication path (for example, 23A). is installed so that it is located.

With this configuration, the second four-way valve 23 can combine each of the above-mentioned short circuit state (third communication pattern) and communication state (fourth communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (including a pattern that communicates the flow path and a pattern that short-circuits the flow path), the angle range that forms the communication pattern (short-circuit state or communication state) is a rotation angle range of 90 degrees (first rotation angle range) And the rotation angles (second rotation angles) at which the communication patterns (communication and short circuit) are switched are set to be 45 degrees, 135 degrees, 225 degrees, and 315 degrees (see FIG. 2(b)). In other words, the second four-way valve 23 is set so that the communication pattern (short-circuit state or communication state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle), and The home position mounting angle is shifted from the first four-way valve 22 by 45 degrees (that is, 1/8 rotation or 1/8 cycle).

Further, in the rotating part 24R of the second three-way valve 24, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 24A communicates between the port 24a and the port 24c1. It is installed in the same position. In other words, the rotating part 24R is configured such that the communication path 24A is located at the upstream port (for example, 24c1) in the clockwise rotation direction in the figure among the four ports separated from each flow path (for example, 13c) as a home position. installed on.

With this configuration, the second three-way valve 24 can have the first output state (fifth communication pattern), which is the above-mentioned non-circulation state, and the second output state (sixth communication pattern), which is the circulation state. , as one communication pattern (that is, a plurality of different communication patterns including a pattern of the first output state and a pattern of the second output state), the communication pattern (the first output state or the second output state) The rotation angle range (second rotation angle range) that forms the output state (output state) is 180 degrees, and the rotation angles at which the communication pattern (connection and short circuit) is switched are 0 degrees and 180 degrees. (See Figure 2(b)). In other words, the second three-way valve 24 is set so that the communication pattern (first output state or second output state) is switched in 1/2 rotation (1/2 cycle) of one rotation (1 cycle). and the installation angle of the home position is the same angle (0 degrees) with respect to the first four-way valve 22, and the installation angle of the home position with respect to the second four-way valve 23 is 45 degrees (that is, 1/8 They are installed with a rotation or 1/8 cycle) deviation.

As explained above, in the flow path switching device 30 according to the first embodiment, the angle of the rotary shaft 32 at which the communication pattern between the first four-way valve 22 and the second four-way valve 23 is switched is shifted by 45 degrees. They are different, and the switching range is the same 90 degree range, and furthermore, the communication pattern of the second three-way valve 24 is configured to switch over a 180 degree range as the angle of the rotating shaft 32. In short, at least the rotation angle of the rotating shaft 32 at which the communication patterns of the first four-way valve 22, the second four-way valve 23, and the second three-way valve 24 are switched, and the rotation angle range of the rotating shaft 32 that forms each communication pattern. One is configured differently from the other. In other words, the first four-way valve 22 and the second four-way valve 23 have the same cycle but are out of phase, and the second three-way valve 24 has a different cycle from the first four-way valve 22 and the second four-way valve 23. It is configured. This makes it possible to achieve all combinations in which the communication patterns of the first four-way valve 22, the second four-way valve 23, and the second three-way valve 24 differ from each other by moving the angle of the rotating shaft 32 in 45-degree increments. be able to. Furthermore, the mechanism for rotationally driving these first four-way valve 22, second four-way valve 23, and second three-way valve 24 can be configured with only one directional valve switching motor 31 and rotating shaft 32, that is, a reduction gear, etc. Since a complicated mechanism can be omitted, it is possible to downsize and reduce costs of the flow path switching device 30 and the heat medium circulation system 10.

[Flow path switching control]
Next, flow path switching control for switching the flow paths (circulation paths) in the heat medium circulation system 10 using the flow path switching device 30 will be described using FIG. 3. FIG. 3 is a flowchart showing channel switching control according to the first embodiment.

For example, while the start switch of the vehicle 1 is turned on, the control unit 50 starts main flow path switching control in order to cool and warm up each part. Then, first, from the amount of heat obtained by passing through the radiator 3 and heater 4 to cool or warm up the motor 5 and battery 6, the first circulation path 11, second circulation path 12, third circulation path 13, and A state in which cooling water is circulated in the four circulation paths 14, in other words, a combination of communication patterns of each directional valve is determined (S1).

That is, when it is necessary to cool or warm up the motor 5, the communication state of the first four-way valve 22 is determined so that the second circulation path 12 and the third circulation path 13 are communicated, and on the contrary, the communication state of the first four-way valve 22 is determined so that the second circulation path 12 and the third circulation path 13 are communicated with each other. When there is no need for cooling or warming up, the short-circuit state of the first four-way valve 22 is determined so that the second circulation path 12 and the third circulation path 13 are short-circuited. Similarly, when it is necessary to cool or warm up the battery 6, the communication state of the second four-way valve 23 is determined so that the fourth circulation path 14 and the third circulation path 13 are communicated, and, conversely, the communication state of the second four-way valve 23 is determined so that the fourth circulation path 14 and the third circulation path 13 are communicated with each other. When there is no need to cool or warm up the second four-way valve 23, the short-circuit state of the second four-way valve 23 is determined so that the fourth circulation path 14 and the third circulation path 13 are short-circuited.

In addition, when it is necessary to warm up each part, the communication state of the first three-way valve 21 is determined so that the first circulation path 11 and the third circulation path 13 are communicated, so that there is no need to warm up each part. In this case, the short-circuit state of the first three-way valve 21 is determined so that the first circulation path 11 and the third circulation path 13 are short-circuited. If each part needs to be cooled, the second output state of the second three-way valve 24 (circulation state of the radiator 3) is determined so that the flow path 13b and the flow path 13d communicate with each other in the third circulation path 13. However, if cooling is not necessary, the first output state of the second three-way valve 24 (non-circulating state of the radiator 3) is determined so that the flow path 13b and the flow path 13c are communicated in the third circulation path 13. .

Note that the control unit 50 also calculates the required flow rate in the first pump WP1 and the required flow rate in the second pump WP2, and controls the driving of the first pump WP1 and the second pump WP2 so as to achieve the flow rate S. do. At this time, if the first pump WP1 and the second pump WP2 do not need to be driven, it is also possible to control the pumps to stop them.

After determining the state of each circulation path in step S1, the control unit 50 changes the state of each directional valve from the state of each direction valve shown in FIG. 2(b) to the home position of the rotating shaft 32 in order to achieve the determined state of each circulation path. The angle (rotation angle) of the target rotated relative to the target is determined (S2). In this embodiment, the control unit 50 includes table data as shown in FIG. 2(b) in a storage unit (not shown), and determines the angle of the rotating shaft 32 by referring to the table data. do.

Then, if the target angle of the rotating shaft 32 determined in step S2 is different from the current angle of the rotating shaft 32, the control unit 50 controls the directional valve switching motor 31 (S3), and in step S2 The rotary shaft 32 is driven to rotate so that the determined target angle of the rotary shaft 32 is achieved. At this time, the control unit 50 selects the rotation direction that is closer to the target angle of the rotation axis 32 determined in step S2 from the current angle of the rotation axis 32, in other words, the rotation direction in which the rotational movement is smaller. is selected to rotate the rotating shaft 32. This makes it possible to shorten the rotational drive time of the rotary shaft 32 compared to, for example, the case where the rotary shaft 32 is rotated half a turn or more in the opposite direction, and the state of each circulation path can be switched with good response. In this way, when the rotational drive of each rotating shaft 32 is finished and the switching of the state of each circulation path is completed, this control is finished.

In addition, in the present embodiment, when rotating the rotating shaft 32 from the current angle of the rotating shaft 32 to the target angle of the rotating shaft 32 determined in step S2, the control unit 50 controls a rotation with a small angle. Although the description has been made of the rotation in the direction, the invention is not limited to this, but especially if there is a state that you do not want to form even momentarily among the conditions of each circulation path, the rotating shaft 32 may be rotated to avoid that state. The direction of rotation may also be determined.

<Second embodiment>
Next, a second embodiment, which is a partial modification of the first embodiment, will be described using FIG. 4. FIG. 4 is a schematic diagram showing a flow path switching device according to the second embodiment. Compared to the first embodiment, the flow path switching device 130 according to the second embodiment has one port communicating with the same flow path in each direction valve, in other words. , the flow path is not branched.

Specifically, as shown in FIG. 4, in the first four-way valve 22, the ports 22a, 22b, 22c, and 22d connected to the flow paths 13f, 13g, 12b, and 12a, respectively, are arranged at an angle of 45 degrees around the rotating portion 22R. The above angle range is formed to be connected to an angle range of less than 90 degrees. That is, the ports 22a, 22b, 22c, and 22d have a shape that connects the same two ports in the first embodiment (see FIG. 2(a)), and have an angular range in which they are not connected to adjacent ports. It is formed of.

Similarly, in the second four-way valve 23, the ports 23a, 23b, 23c, and 23d connected to the flow paths 13a, 13b, 14b, and 14c, respectively, are arranged at an angle of 45 degrees or more and less than 90 degrees around the rotating portion 23R. It is formed to connect to the range. Also, in the second three-way valve 24, the ports 24b and 24c connected to the flow paths 13c and 13d, respectively, are formed so as to connect to an angular range of 135 degrees or more and less than 180 degrees around the rotating portion 24R. .

In the flow path switching device 130 according to the second embodiment configured as described above, the angle of the rotating shaft 32 is controlled as in the first embodiment (see FIG. 2(b)). It is possible to achieve all combinations in which the communication patterns of the first four-way valve 22, the second four-way valve 23, and the second three-way valve 24 are different from each other.

Note that the configuration, operation, and effects of the second embodiment other than this are the same as those of the first embodiment, so the description thereof will be omitted.

<Third embodiment>
Next, a third embodiment, which is a partial modification of the first embodiment, will be described using FIG. 5. FIG. 5(a) is a schematic diagram showing a flow path switching device according to the third embodiment, and FIG. 5(b) is a schematic diagram showing the angle of the rotation axis and each direction in the flow path switching device according to the third embodiment. It is a figure which shows the relationship with the communication pattern of a valve. Compared to the first embodiment, the flow path switching device 230 according to the third embodiment uses one (single) directional valve switching motor 31 to control the first four-way valve 22 (first direction valve) and the second three-way valve 24 (second directional valve).

Specifically, ports 22a, 22b, 22c, and 22d are formed in the first four-way valve 22 at four equal positions in the circumferential direction, that is, at intervals of 90 degrees. A flow path 13f is connected to the port 22a, a flow path 13g is connected to the port 22b, a flow path 12b is connected to the port 22c, and a flow path 12a is connected to the port 22d.

Further, the second three-way valve 24 is also formed with ports 24b1, 24b2, 24c1, and 24c2 at four equal positions in the circumferential direction, that is, at intervals of 90 degrees. The ports 24b1 and 24b2 are formed into two parts with the same port function, and are connected in a branched manner with the flow path 13d. Similarly, the ports 24c1 and 24c2 are formed into two parts with the same port function, and are connected in a branched manner with the flow path 13c.

The rotating portion 22R of the first four-way valve 22 has a communication passage 22A that communicates with the ports 22a and 22b when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees. The passage 22B is installed at a position where the ports 22c and 22d communicate with each other.

With this configuration, the first four-way valve 22 can combine each of the above-mentioned short circuit state (first communication pattern) and communication state (second communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (including a pattern that communicates the flow path and a pattern that short-circuits the flow path), the angular range that forms the communication pattern (short circuit state or communication state) is a rotation angle range of 90 degrees, and the communication pattern (contains a pattern that connects the flow path). and short circuit) are set to switch at 0 degrees, 90 degrees, 180 degrees, and 270 degrees (see FIG. 5(b)). In other words, the first four-way valve 22 is set so that the communication pattern (short-circuit state or communication state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle).

Further, in the rotating part 24R of the second three-way valve 24, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 24A communicates between the port 24a and the port 24c2. It is installed in the same position. In other words, the rotating part 24R is configured such that the communication path 24A is located at the downstream port (for example, 24c2) in the clockwise rotational direction in the figure among the two ports separated from each flow path (for example, 13c) as a home position. installed on.

With this configuration, the second three-way valve 24 can have the first output state (third communication pattern), which is the above-mentioned non-circulation state, and the second output state (fourth communication pattern), which is the circulation state. , as one communication pattern (that is, a plurality of different communication patterns including a pattern of the first output state and a pattern of the second output state), the communication pattern (the first output state or the second output state) The rotation angle range for forming the output state (output state) is set to be 180 degrees, and the rotation angles for switching the communication pattern (connection and short circuit) are set to 90 degrees and 270 degrees (Figure 5(b) reference). In other words, the second three-way valve 24 is set so that the communication pattern (first output state or second output state) is switched in 1/2 rotation (1/2 cycle) of one rotation (1 cycle). The four-way valve 22 is mounted at a home position with a mounting angle shifted by 90 degrees (that is, 1/4 rotation or 1/4 cycle).

As described above, the flow path switching device 230 according to the third embodiment is configured such that the range in which the communication pattern of the first four-way valve 22 is switched is within a range of 90 degrees as the angle of the rotation shaft 32. The communication pattern of the second three-way valve 24 is changed over a range of 180 degrees as the angle of the rotating shaft 32. In short, at least one of the rotation angle of the rotation shaft 32 at which the communication patterns of the first four-way valve 22 and the second three-way valve 24 are switched, and the rotation angle range of the rotation shaft 32 that forms each communication pattern are different from each other. configured. In other words, the first four-way valve 22 and the second three-way valve 24 are configured to have different cycles. Thereby, by moving the angle of the rotating shaft 32 by 90 degrees, all the combinations in which the communication patterns in the first four-way valve 22 and the second three-way valve 24 are different from each other can be achieved. Furthermore, the mechanism for rotationally driving the first four-way valve 22 and the second three-way valve 24 can be configured with only one directional valve switching motor 31 and the rotating shaft 32, which eliminates the need for a complicated mechanism such as a reduction gear. Therefore, it is possible to reduce the size and cost of the flow path switching device 230 and the heat medium circulation system 10.

Note that the configuration, operation, and effects of the third embodiment other than this are the same as those of the first embodiment, so the description thereof will be omitted.

<Fourth embodiment>
Next, a fourth embodiment, which is a partial modification of the first embodiment, will be described using FIG. 6. FIG. 6(a) is a schematic diagram showing a flow path switching device according to the fourth embodiment, and FIG. 6(b) is a schematic diagram showing the angle of the rotation axis and each direction in the flow path switching device according to the fourth embodiment. It is a figure which shows the relationship with the communication pattern of a valve. Compared to the first embodiment, the flow path switching device 330 according to the fourth embodiment uses one (single) directional valve switching motor 31 to control the first four-way valve 22 (first direction The four-way valve 23 (second directional valve) and the second four-way valve 23 (second directional valve) are rotated.

Specifically, similarly to the first embodiment, the first four-way valve 22 has ports 22a1, 22a2, 22b1, 22b2, 22c1, 22c2, 22d1, and 22d2 are formed. Of these, the ports 22a1 and 22a2 are formed into two parts with the same port function, and are connected to each other in a manner that the flow path 13f is branched. Similarly, the ports 22b1 and 22b2 are formed into two parts to function as the same port, and are connected in a branched manner with the flow path 13g. Similarly, the ports 22c1 and 22c2 are formed into two parts to function as the same port, and are connected in a branched manner with the flow path 12b. Similarly, the ports 22d1 and 22d2 are also formed into two parts with the same port function, and are connected in a branched manner with the flow path 12a.

Further, the second four-way valve 23 also has ports 23a1, 23a2, 23b1, 23b2, 23c1, 23c2, 23d1, and 23d2 formed at eight equal positions in the circumferential direction, that is, at intervals of 45 degrees. ing. Among these ports, the ports 23a1 and 23a2 are formed into two parts with the same port function, and are connected in a branched manner with the flow path 13a. Similarly, the ports 23b1 and 23b2 are formed into two parts to function as the same port, and are connected in a branched manner with the flow path 13b. Similarly, the ports 23c1 and 23c2 are formed into two parts to function as the same port, and are connected in a branched manner with the flow path 14b. Similarly, the ports 23d1 and 23d2 are also formed into two parts with the same port function, and are connected in a branched manner with the flow path 14c.

The rotating portion 22R of the first four-way valve 22 has a communication path 22A that communicates between the port 22a1 and the port 22b1 when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees. The passage 22B is installed at a position where the ports 22c1 and 22d1 communicate with each other. In other words, in the rotating part 22R, each communication path (for example, 22A) is connected to the upstream port (for example, 22c1) in the clockwise rotation direction in the figure of the two ports separated from the flow path (for example, 13f) as the home position. installed in the correct position.

With this configuration, the first four-way valve 22 can combine each of the above-mentioned short circuit state (first communication pattern) and communication state (second communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (including a pattern that communicates the flow path and a pattern that short-circuits the flow path), the angular range that forms the communication pattern (short circuit state or communication state) is a rotation angle range of 90 degrees, and the communication pattern (contains a pattern that connects the flow path). and short circuit) are set to switch at 0 degrees, 90 degrees, 180 degrees, and 270 degrees (see FIG. 6(b)). In other words, the first four-way valve 22 is set so that the communication pattern (short-circuit state or communication state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle).

Further, in the rotating part 23R of the second four-way valve 23, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 23A communicates between the port 23a2 and the port 23b2. At the same time, the communication path 23B is installed at a position where the ports 23c2 and 23d2 communicate with each other. In other words, the rotating part 23R has a home position where the downstream port (for example, 23a2) in the clockwise rotational direction in the figure of the two ports separated from each flow path (for example, 13a) is connected to each communication path (for example, 23A). is installed so that it is located.

With this configuration, the second four-way valve 23 can combine each of the above-mentioned short circuit state (third communication pattern) and communication state (fourth communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (including a pattern that communicates the flow path and a pattern that short-circuits the flow path), the angular range that forms the communication pattern (short circuit state or communication state) is a rotation angle range of 90 degrees, and the communication pattern (contains a pattern that connects the flow path). and short circuit) are set to switch at 45 degrees, 135 degrees, 225 degrees, and 315 degrees (see FIG. 6(b)). In other words, the second four-way valve 23 is set so that the communication pattern (short-circuit state or communication state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle), and The home position mounting angle is shifted from the first four-way valve 22 by 45 degrees (that is, 1/8 rotation or 1/8 cycle).

As explained above, in the flow path switching device 330 according to the fourth embodiment, the angle of the rotary shaft 32 at which the communication pattern between the first four-way valve 22 and the second four-way valve 23 is switched is shifted by 45 degrees. They are configured so that the different and switching ranges are the same 90 degree range. In short, at least one of the rotation angle of the rotation shaft 32 at which the communication patterns of the first four-way valve 22 and the second four-way valve 23 are switched, and the rotation angle range of the rotation shaft 32 that forms each communication pattern are different from each other. configured. In other words, the first four-way valve 22 and the second four-way valve 23 are configured to be out of phase with each other at the same period. Thereby, by moving the angle of the rotating shaft 32 by 45 degrees, all combinations in which the communication patterns in the first four-way valve 22 and the second four-way valve 23 are different from each other can be achieved. Furthermore, the mechanism for rotationally driving the first four-way valve 22 and the second four-way valve 23 can be configured with only one directional valve switching motor 31 and the rotating shaft 32, which eliminates the need for a complicated mechanism such as a reduction gear. Therefore, it is possible to reduce the size and cost of the flow path switching device 330 and the heat medium circulation system 10.

Note that the configuration, operation, and effects of the fourth embodiment other than this are the same as those of the first embodiment, so the description thereof will be omitted.

<Fifth embodiment>
Next, a fifth embodiment, which is a partial modification of the first embodiment, will be described using FIG. 7. FIG. 7(a) is a schematic diagram showing a flow path switching device according to the fifth embodiment, and FIG. 7(b) is a schematic diagram showing the angle of the rotation axis and each direction in the flow path switching device according to the fifth embodiment. It is a figure which shows the relationship with the communication pattern of a valve. Compared to the first embodiment, the flow path switching device 430 according to the fifth embodiment uses one (single) directional valve switching motor 31 to control the first four-way valve 22 (first direction It rotates four directional valves: a second four-way valve 23 (second directional valve), a first three-way valve 21 (third directional valve), and a second three-way valve 24 (fourth directional valve). be. Note that in FIG. 7A showing the flow path switching device 430 according to the fifth embodiment, the number of ports is large, so the flow paths are omitted and the same ports are indicated by arrows in the same direction. However, similarly to the first embodiment, the description will be made assuming that each port is connected to each flow path.

Specifically, the first four-way valve 22 has four ports 22a, four ports 22b, four ports 22c, located at 16 uniform positions in the circumferential direction, that is, at intervals of 22.5 degrees. Four ports 22d are formed side by side in the circumferential direction. Among these, the four ports 22a are divided into four ports having the same port function, and are connected in a branched manner with the flow path 13f (see FIG. 1). Similarly, the four ports 22b are also formed into four parts with the same port function, and are connected in a branched manner with the flow path 13g (see FIG. 1). Similarly, the four ports 22c are also formed into four parts with the same port function, and are connected in a branched manner with the flow path 12b (see FIG. 1). Similarly, the four ports 22d are also formed into four parts with the same port function, and are connected in a branched manner with the flow path 12a (see FIG. 1).

In addition, the second four-way valve 23 also has four ports 23a, four ports 23b, four ports 23c, and four ports at 16 evenly spaced positions in the circumferential direction, that is, at intervals of 22.5 degrees. Ports 23d are formed side by side in the circumferential direction. Of these, the four ports 23a are divided into four ports having the same port function, and are connected in a branched manner with the flow path 13a (see FIG. 1). Similarly, the four ports 23b are also formed into four parts with the same port function, and are connected in a branched manner with the flow path 13b (see FIG. 1). Similarly, the four ports 23c are also formed into four parts with the same port function, and are connected in a branched manner with the flow path 14b (see FIG. 1). Similarly, the four ports 23d are also formed into four parts with the same port function, and are connected in a branched manner with the flow path 14c (see FIG. 1).

Also, in the first three-way valve 21, eight ports 21b and eight ports 21c are formed in 16 circumferentially uniform positions, that is, at intervals of 22.5 degrees, and are lined up in the circumferential direction. has been done. Among these ports, the port 21b is formed into eight parts to function as the same port, and the flow path 11b (see FIG. 1) is connected in a branched manner. Similarly, the port 21c is divided into eight parts to function as the same port, and the flow path 13f (see FIG. 1) is connected in a branched manner.

In addition, the second three-way valve 24 also has eight ports 24b and eight ports 24c arranged alternately in the circumferential direction at 16 equal positions in the circumferential direction, that is, at intervals of 22.5 degrees. are formed respectively. Among these ports, the port 24b is formed into eight parts to function as the same port, and the flow path 13b (see FIG. 1) is connected in a branched manner. Similarly, the port 24c is divided into eight parts to function as the same port, and the flow path 13c (see FIG. 1) is connected in a branched manner. Note that these eight ports 24b and eight ports 24c are formed and connected by oil passages that three-dimensionally intersect with the direction of the rotation axis of the rotating portion 24R so that the flow passages do not intersect.

In the rotating part 22R of the first four-way valve 22, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication path 22A is located at one of the four ports 22a in the figure. The port on the upstream side in the clockwise rotational direction communicates with the port on the upstream side in the clockwise rotational direction in the figure among the four ports 22b, and the communication path 22B communicates with the port on the upstream side in the clockwise rotational direction in the figure among the four ports 22b. The upstream port in the clockwise rotational direction in the figure and the upstream port in the clockwise rotational direction in the figure out of the four ports 22d are installed in a position that communicates with each other.

With this configuration, the first four-way valve 22 can combine each of the above-mentioned short circuit state (first communication pattern) and communication state (second communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (including a pattern that communicates the flow path and a pattern that short-circuits the flow path), the angle range that forms the communication pattern (short-circuit state or communication state) is a rotation angle range of 90 degrees (first rotation angle range) And the rotation angle (first rotation angle) at which the communication pattern (communication and short circuit) is switched is set to be 0 degrees, 90 degrees, 180 degrees, and 270 degrees (see FIG. 7(b)). In other words, the first four-way valve 22 is set so that the communication pattern (short-circuit state or communication state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle).

In addition, in the rotating part 23R of the second four-way valve 23, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 23A is located at one of the four ports 23a. The third port from the upstream side in the clockwise rotational direction in the inside communicates with the third port from the upstream side in the clockwise rotational direction in the figure among the four ports 23b, forming a communication path. 23B is the third port from the upstream side in the clockwise rotational direction in the figure among the four ports 23c, and the third port from the upstream side in the clockwise rotational direction in the figure among the four ports 23d. It is installed so that it communicates with the eye port.

With this configuration, the second four-way valve 23 can combine each of the above-mentioned short circuit state (third communication pattern) and communication state (fourth communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (including a pattern that communicates the flow path and a pattern that short-circuits the flow path), the angle range that forms the communication pattern (short-circuit state or communication state) is a rotation angle range of 90 degrees (first rotation angle range) And the rotation angles (second rotation angles) at which the communication pattern (communication and short circuit) is switched are set to be 45 degrees, 135 degrees, 225 degrees, and 315 degrees (see FIG. 7(b)). In other words, the second four-way valve 23 is set so that the communication pattern (short-circuit state or communication state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle), and The home position mounting angle is shifted from the first four-way valve 22 by 45 degrees (that is, 1/8 rotation or 1/8 cycle).

Further, in the rotating part 21R of the first three-way valve 21, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 21A communicates between the port 21a and the port 21b. It is installed in the same position. In other words, the rotating portion 21R is installed such that the communication path 21A is located at one port out of eight ports separated from each flow path (for example, 11b) as a home position.

With this configuration, the first three-way valve 21 can switch between the first output state (fifth communication pattern), which is the communication state between the first circulation path 11 and the third circulation path 13, and the third circulation pattern. a second output state (sixth communication pattern) that is a short-circuit state in which the channel 13 is short-circuited; ), the angle range that forms the communication pattern (first output state or second output state) is a rotation angle range of 180 degrees (second rotation angle range), and the communication pattern (output pattern) is disconnected. The changing rotation angles are set to be 0 degrees and 180 degrees (see FIG. 7(b)). In other words, the first three-way valve 21 is set so that the communication pattern (first output state or second output state) is switched in 1/2 rotation (1/2 cycle) of one rotation (1 cycle). and the installation angle of the home position is the same angle (0 degrees) with respect to the first four-way valve 22, and the installation angle of the home position with respect to the second four-way valve 23 is 45 degrees (that is, 1/8 They are installed with a rotation or 1/8 cycle) deviation.

Further, in the rotating part 24R of the second three-way valve 24, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 24A communicates between the ports 24a and 24c. It is installed in the same position. In other words, the rotating portion 24R is installed such that the communication path 24A is located at one port out of eight ports separated from each flow path (for example, 13d) as a home position.

With this configuration, the second three-way valve 24 can have the first output state (seventh communication pattern), which is the above-mentioned non-circulation state, and the second output state (eighth communication pattern), which is the circulation state. , as one communication pattern (that is, a plurality of different communication patterns including a pattern of the first output state and a pattern of the second output state), the communication pattern (the first output state or the second output state) The rotation angle range (third rotation angle range) where the angle range forming the output state) is 22.5 degrees, and the rotation angle at which the communication pattern (output pattern) is switched is 22.5 degrees from 0 degrees to 360 degrees. (See FIG. 7(b)). In other words, the second three-way valve 24 is set so that the communication pattern (first output state or second output state) is switched in 1/16 rotation (1/16 cycle) out of 1 rotation (1 cycle). and the installation angle of the home position is the same angle (0 degrees) with respect to the first four-way valve 22, and the installation angle of the home position with respect to the second four-way valve 23 is 45 degrees (that is, 1/8 They are installed with a rotation or 1/8 cycle) deviation.

As explained above, in the flow path switching device 430 according to the fifth embodiment, the angle of the rotary shaft 32 at which the communication pattern between the first four-way valve 22 and the second four-way valve 23 is switched is shifted by 45 degrees. The communication pattern of the first three-way valve 21 is different and the switching range is the same 90 degree range, and furthermore, the communication pattern of the first three-way valve 21 is set so that the range of switching is a 180-degree range as the angle of the rotating shaft 32, and the second three-way valve 24 is It is configured such that the range in which the communication pattern is switched is within a range of 22.5 degrees as the angle of the rotating shaft 32. In short, the rotation angle of the rotating shaft 32 at which the communication patterns of the first four-way valve 22, the second four-way valve 23, the first three-way valve 21, and the second three-way valve 24 are switched, and the rotation of the rotating shaft 32 that forms each communication pattern. At least one of the angle range and the angle range are configured to be different from each other. In other words, the first four-way valve 22 and the second four-way valve 23 have the same cycle and are out of phase, and the first three-way valve 21 and the second three-way valve 24 are different from each other. are arranged to have different periods. Thereby, by moving the angle of the rotating shaft 32 by 22.5 degrees, the communication patterns in the first four-way valve 22, the second four-way valve 23, the first three-way valve 21, and the second three-way valve 24 are different from each other. All combinations can be achieved. Furthermore, the mechanism for rotationally driving the first four-way valve 22, the second four-way valve 23, the first three-way valve 21, and the second three-way valve 24 can be configured with only one directional valve switching motor 31 and a rotating shaft 32. That is, since a complicated mechanism such as a reduction gear is not required, it is possible to downsize and cost down the flow path switching device 430 and the heat medium circulation system 10.

Note that the configuration, operation, and effects of the fifth embodiment other than this are the same as those of the first embodiment, so the description thereof will be omitted.

<Sixth embodiment>
Next, a sixth embodiment, which is a partial modification of the first and third embodiments, will be described with reference to FIGS. 8 and 9. FIG. 8 is a schematic diagram showing a part of a heat medium circulation system for a vehicle according to the sixth embodiment, and FIG. 9(a) is a schematic diagram showing a flow path switching device according to the sixth embodiment. (b) is a diagram showing the relationship between the angle of the rotating shaft and the communication pattern of each directional valve in the flow path switching device according to the sixth embodiment. Note that the circulation path 15 of the heat medium circulation system 10 shown in FIG. 8 is a circulation path that is communicated with other circulation paths via flow paths 15f and 15g, and is used to flow parts of other circulation paths, especially cooling water. Pumps are omitted.

As shown in FIG. 8, the circulation path 15 communicates with a flow path 15g through which cooling water is pushed by a pump (not shown), flow paths 15b and 15d communicating with the flow path 15g, and a flow path 15d. A first four-way valve 25, a passage 15e communicating from the first four-way valve 25 to the radiator 3, a passage 15a communicating from the radiator 3 to the passage 15f, and a second three-way valve 26 communicating with the passage 15b. , a flow path 15c that communicates with the flow path 15f from the second three-way valve 26, and a flow path 15f that allows the cooling water that has passed through the radiator 3 and/or the cooling water that has bypassed the radiator 3 to flow to another circulation path. have.

In addition, the first four-way valve 25 can be operated in a blocking state in which the communication paths 25A and 25B connect the ports that communicate with the same flow path to shut off the flow path 15d and the flow path 15e, and in a blocking state in which the flow path 15d and the flow path 15e are disconnected from each other. It is configured such that the communication state (arrow E1) in which communication is performed can be switched. Further, the second three-way valve 26 can be operated in a blocking state in which one of the communicating paths 26A is not connected to the port, thereby blocking the flow path 15b and the flow path 15c, and in a blocking state in which the flow path 15b and the flow path 15c are communicated with each other. The state (arrow E2) is configured to be switchable.

As shown in FIG. 9(a), a flow path switching device 530 according to the sixth embodiment has one (single) directional valve switching motor 31, compared to the first embodiment described above. This rotationally drives two directional valves, the first four-way valve 25 (first directional valve) and the second three-way valve 26 (second directional valve).

In detail, ports 25a1, 25a2, 25b1, and 25b2 are formed in the first four-way valve 25 at four equal positions in the circumferential direction, that is, at intervals of 90 degrees. Among these ports, the ports 25a1 and 25a2 are formed into two parts with the same port function, and are connected in a branched manner with the flow path 15d. Similarly, the ports 25b1 and 25b2 are formed into two parts to function as the same port, and are connected in a branched manner with the flow path 15e.

In addition, ports 26b1 and 26b2 are formed in the second three-way valve 26 at two equal positions in the circumferential direction, that is, at intervals of 90 degrees. The ports 26b1 and 26b2 are formed into two parts with the same port function, and are connected to each other in a manner that the flow path 15c is branched.

The rotating part 25R of the first four-way valve 25 has a communication path 25A that communicates between the ports 25a1 and 25a2 when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees. The passage 25B is installed at a position where the port 25b1 and the port 25b2 communicate with each other. In other words, the rotating part 25R is installed so that the communication passages 25A and 25B are located at two ports separated from the respective flow passages 15d and 15e (ie, in a blocked state) as the home position.

With this configuration, the first four-way valve 25 can combine each of the above-mentioned cutoff state (first communication pattern) and communication state (second communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (includes a pattern that communicates the flow path and a pattern that blocks it), the angular range that forms the communication pattern (blocking state or communicating state) is a rotation angle range of 90 degrees, and the communication pattern (blocking pattern) The rotation angles at which the rotation angles (communication with and communication) are switched are set to 0 degrees, 90 degrees, 180 degrees, and 270 degrees (see FIG. 9(b)). In other words, the first four-way valve 25 is set so that the communication pattern (blocking state or communication state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle).

Further, in the rotating part 26R of the second three-way valve 26, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 26A communicates between the port 26a and the port 26b1. It is installed in the same position. In other words, the rotating part 26R is configured such that the communication path 26A is located at the downstream port (for example, 26b1) in the clockwise rotational direction in the figure of the two ports separated from the flow path 15c as the home position (that is, the communication path condition).

With this configuration, the second three-way valve 26 can perform each of the above-mentioned communication state (third communication pattern) and cutoff state (fourth communication pattern) into one communication pattern (that is, a plurality of different communication patterns). When considered as a communication pattern (including a pattern that communicates the flow path and a pattern that blocks the flow path), the angular range forming the communication pattern (communication state or blockage state) is a rotation angle range of 180 degrees, and the communication pattern The rotation angles at which communication and isolation are switched are set to 90 degrees and 270 degrees (see FIG. 9(b)). In other words, the second three-way valve 26 is set so that the communication pattern (communication state or cutoff state) is switched in 1/2 rotation (1/2 cycle) out of 1 rotation (1 cycle), and The home position is installed with an installation angle shifted by 90 degrees (that is, 1/4 rotation or 1/4 cycle) with respect to the first four-way valve 25.

As explained above, in the flow path switching device 530 according to the sixth embodiment, the angle of the rotary shaft 32 at which the communication pattern between the first four-way valve 25 and the second three-way valve 26 is switched is shifted by 90 degrees. They are different and are configured so that the switching range is the same 180 degree range. In short, at least one of the rotation angle of the rotation shaft 32 at which the communication patterns of the first four-way valve 25 and the second three-way valve 26 are switched, and the rotation angle range of the rotation shaft 32 that forms each communication pattern are different from each other. configured. In other words, the first four-way valve 25 and the second three-way valve 26 are configured to be out of phase with each other at the same cycle. Thereby, by moving the angle of the rotating shaft 32 by 90 degrees, all combinations in which the communication patterns in the first four-way valve 25 and the second three-way valve 26 are different from each other can be achieved. Furthermore, the mechanism for rotationally driving the first four-way valve 25 and the second three-way valve 26 can be configured with only one directional valve switching motor 31 and the rotating shaft 32, which eliminates the need for a complicated mechanism such as a reduction gear. Therefore, it is possible to reduce the size and cost of the flow path switching device 530 and the heat medium circulation system 10.

Note that the configuration, operation, and effects of the sixth embodiment other than this are the same as those of the first and third embodiments, so the description thereof will be omitted.

<Seventh embodiment>
Next, a seventh embodiment, which is a partial modification of the first and sixth embodiments, will be described with reference to FIGS. 10 and 11. FIG. 10 is a schematic diagram showing a part of the heat medium circulation system for a vehicle according to the seventh embodiment, and FIG. 11(a) is a schematic diagram showing a flow path switching device according to the seventh embodiment. (b) is a diagram showing the relationship between the angle of the rotating shaft and the communication pattern of each directional valve in the flow path switching device according to the seventh embodiment. Note that the circulation path 16 of the heat medium circulation system 10 shown in FIG. 10 is also a circulation path that is communicated with other circulation paths via flow paths 16m and 16k, and is used to flow parts of other circulation paths, especially cooling water. Pumps are omitted.

As shown in FIG. 10, the circulation path 16 communicates with a flow path 16m through which cooling water is pushed by a pump (not shown), flow paths 16c and 16e communicating with the flow path 16m, and flow path 16e. A flow path 16f, a first four-way valve 27 that communicates with the flow path 16f, a flow path 16g that communicates from the first four-way valve 27 to the radiator 3, and a flow path 16a that communicates from the radiator 3 to the flow path 16b. A flow path 16b communicating with the flow path 16k, a flow path 16h communicating with the flow path 16e, a second four-way valve 28 communicating with the flow path 16h, and a flow path 16i communicating from the second four-way valve 28 to the heater 4. , a flow path 16j communicating from the heater 4 to the flow path 16b, a second three-way valve 29 communicating with the flow path 16c, a flow path 16d communicating from the second three-way valve 29 to the flow path 16k, and a radiator 3. and/or the cooling water that has passed through the heater 4, and/or the cooling water that has bypassed the radiator 3 and the heater 4, and a flow path 16k that allows the cooling water that has passed through the radiator 3 and the heater 4 to flow to another circulation path.

In addition, the first four-way valve 27 can be operated in a blocking state in which the communication paths 27A and 27B connect the ports that communicate with the same flow path to shut off the flow path 16f and the flow path 16g, and in a blocking state in which the flow path 16f and the flow path 16g are disconnected from each other. It is configured such that the communication state (arrow F1) in which communication is performed can be switched. Further, the second four-way valve 28 can be operated in a blocking state in which the communication paths 28A and 28B connect the ports that communicate with the same flow path to shut off the flow path 16h and the flow path 16i, and in a blocking state in which the flow path 16h and the flow path 16i are disconnected from each other. It is configured such that the communication state (arrow F2) in which communication is performed can be switched. The second three-way valve 29 operates in a blocking state in which one of the communication paths 29A is not connected to the port, thereby blocking the flow path 16c and the flow path 16d, and in a disconnection state in which the flow path 16c and the flow path 16d are communicated with each other. The state (arrow F3) is configured to be switchable.

As shown in FIG. 11(a), a flow path switching device 630 according to the seventh embodiment has one (single) directional valve switching motor 31 compared to the first embodiment described above. This rotationally drives three directional valves: the first four-way valve 27 (first directional valve), the second four-way valve 28 (second directional valve), and the second three-way valve 29 (third directional valve).

Specifically, the first four-way valve 27 has ports 27a1, 27a2, 27a3, 27a4, ports 27b1, 27b2, 27b3, 27b4 is formed. Among these ports, the ports 27a1, 27a2, 27a3, and 27a4 are divided into four and are formed to function as the same port, and are connected in a branched manner with the flow path 16f. Similarly, the ports 27b1, 27b2, 27b3, and 27b4 are formed into four parts with the same port function, and are connected to each other in a branched manner with the flow path 16g.

Similarly, the second four-way valve 28 has ports 28a1, 28a2, 28a3, 28a4, ports 28b1, 28b2, 28b3, 28b4 is formed. Among these ports, the ports 28a1, 28a2, 28a3, and 28a4 are divided into four and are formed to function as the same port, and are connected in a branched manner with the flow path 16h. Similarly, the ports 28b1, 28b2, 28b3, and 28b4 are formed into four parts with the same port function, and are connected to each other in a branched manner with the flow path 16i.

In addition, ports 29b1, 29b2, 29b3, and 29b4 are formed in the second three-way valve 29 at four equal positions in the circumferential direction, that is, at intervals of 45 degrees. The ports 29b1, 29b2, 29b3, and 29b4 are formed into four parts with the same port function, and are connected to each other in a branched manner with the flow path 16d.

The rotating portion 27R of the first four-way valve 27 has a communication passage 27A that communicates with the ports 27a2 and 27a4 when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees. The passage 27B is installed at a position where the port 27b2 and the port 27b4 communicate with each other. In other words, the rotating part 27R is installed so that the communication passages 27A and 27B are located at two ports separated from the respective flow passages 16f and 16g (that is, in a blocked state) as the home position.

With this configuration, the first four-way valve 27 can combine each of the above-mentioned cutoff state (first communication pattern) and communication state (second communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (includes a pattern that communicates the flow path and a pattern that blocks it), the angular range that forms the communication pattern (blocking state or communication state) is a rotation angle range of 45 degrees, and the communication pattern (blocking pattern) The rotation angles at which the rotation angles (communication with and communication) are switched are set to 0 degrees, 90 degrees, 180 degrees, and 270 degrees (see FIG. 11(b)). In other words, the first four-way valve 27 is set so that the communication pattern (blocking state or communication state) is switched in 1/4 rotation (1/4 cycle) of one rotation (1 cycle).

Further, in the rotating part 28R of the second four-way valve 28, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 28A communicates between the port 28a1 and the port 28a3. At the same time, the communication passage 28B is installed at a position where the port 28b1 and the port 28b3 communicate with each other. In other words, the rotating part 28R is installed so that the communication passages 28A and 28B are located at two ports separated from the respective flow passages 16h and 16i (that is, in a blocked state) as the home position.

With this configuration, the second four-way valve 28 can perform each of the above-mentioned communication state (third communication pattern) and cutoff state (fourth communication pattern) into one communication pattern (that is, a plurality of different communication patterns). When considered as a communication pattern (including a pattern that communicates the flow path and a pattern that blocks it), the angular range that forms the communication pattern (communication state or blockage state) is a rotation angle range of 90 degrees, and the communication pattern The rotation angles at which communication and isolation are switched are set to 45 degrees, 135 degrees, 225 degrees, and 315 degrees (see FIG. 11(b)). In other words, the second four-way valve 28 is set so that the communication pattern (communication state or cutoff state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle), and The home position is installed with an installation angle shifted by 45 degrees (that is, 1/8 rotation or 1/8 cycle) with respect to the first four-way valve 27.

Further, in the rotating part 29R of the second three-way valve 29, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 29A communicates between the port 29a and the port 29b4. It is installed in the same position. In other words, the rotating part 29R is configured such that the communication path 29A is located at the upstream port (for example, 29b4) in the clockwise rotation direction in the figure among the four ports separated from the flow path 16d as the home position (that is, the communication path condition).

With this configuration, the second three-way valve 29 can perform each of the above-mentioned communication state (fifth communication pattern) and cutoff state (sixth communication pattern) into one communication pattern (that is, a plurality of different communication patterns). When considered as a communication pattern (including a pattern that communicates the flow path and a pattern that blocks the flow path), the angular range forming the communication pattern (communication state or blockage state) is a rotation angle range of 180 degrees, and the communication pattern The rotation angles at which communication and isolation are switched are set to 180 degrees and 0 degrees (see FIG. 11(b)). In other words, the second three-way valve 29 is set so that the communication pattern (communication state or cutoff state) is switched in 1/2 rotation (1/2 cycle) out of 1 rotation (1 cycle), and The installation angle of the home position is shifted by 90 degrees (that is, 1/4 rotation or 1/4 cycle) with respect to the first four-way valve 27, and the installation angle of the home position with respect to the second four-way valve 28 is 45 degrees. (that is, 1/8 rotation or 1/8 cycle).

As explained above, in the flow path switching device 630 according to the seventh embodiment, the angle of the rotary shaft 32 at which the communication pattern between the first four-way valve 27 and the second four-way valve 28 is switched is shifted by 45 degrees. They are different, and the switching range is the same 90 degree range, and furthermore, the communication pattern of the second three-way valve 29 is configured to switch over a 180 degree range as the angle of the rotating shaft 32. In short, at least the rotation angle of the rotating shaft 32 at which the communication patterns of the first four-way valve 27, the second four-way valve 28, and the second three-way valve 29 are switched, and the rotation angle range of the rotating shaft 32 that forms each communication pattern. One is configured differently from the other. In other words, the first four-way valve 27 and the second four-way valve 28 have the same cycle but are out of phase, and the second three-way valve 29 has a different cycle from the first four-way valve 27 and the second four-way valve 28. It is configured. This makes it possible to achieve all combinations in which the communication patterns of the first four-way valve 27, the second four-way valve 28, and the second three-way valve 29 differ from each other by moving the angle of the rotating shaft 32 in 45-degree increments. be able to. In addition, the mechanism for rotationally driving the first four-way valve 27, the second four-way valve 28, and the second three-way valve 29 can be configured with only one directional valve switching motor 31 and a rotating shaft 32, that is, a reduction gear, etc. Since a complicated mechanism can be omitted, it is possible to reduce the size and cost of the flow path switching device 630 and the heat medium circulation system 10.

Note that the configuration, operation, and effects of the seventh embodiment other than this are the same as those of the first and sixth embodiments, so the description thereof will be omitted.

<Eighth embodiment>
Next, an eighth embodiment, which is a partial modification of the first, fifth, sixth, and seventh embodiments described above, will be described with reference to FIGS. 12 and 13. FIG. 12 is a schematic diagram showing a part of a heat medium circulation system for a vehicle according to the eighth embodiment, and FIG. 13(a) is a schematic diagram showing a flow path switching device according to the eighth embodiment. (b) is a diagram showing the relationship between the angle of the rotating shaft and the communication pattern of each directional valve in the flow path switching device according to the eighth embodiment. Note that the circulation path 17 of the heat medium circulation system 10 shown in FIG. 12 is also a circulation path that communicates with other circulation paths via flow paths 17q and 17r, and is used to flow parts of other circulation paths, especially cooling water. Pumps are omitted.

As shown in FIG. 12, the circulation path 17 communicates with a flow path 17r through which cooling water is pushed by a pump (not shown), flow paths 17d and 17f communicating with the flow path 17r, and a flow path 17f. A flow path 17g, a flow path 17h communicating with the flow path 17g, a first four-way valve 121 communicating with the flow path 17h, a flow path 17i communicating from the first four-way valve 121 to the radiator 3, and a flow path 17i communicating from the radiator 3 to the radiator 3. A channel 17a that communicates with the channel 17b, a channel 17b that communicates with the channel 17c, a channel 17c that communicates with the channel 17q, a channel 17j that communicates with the channel 17g, and a channel 17j that communicates with the channel 17j. A second four-way valve 122, a flow path 17k communicating from the second four-way valve 122 to the heater 4, a flow path 17m communicating from the heater 4 to the flow path 17b, and a flow path 17n communicating with the flow path 17f, A first three-way valve 123 communicates with the flow path 17n, a flow path 17o communicates from the first three-way valve 123 to the battery 6, a flow path 17p communicates from the battery 6 to the flow path 17c, and a flow path 17d communicates. a second three-way valve 124 that communicates with the flow path 17q, a flow path 17e that communicates the second three-way valve 124 with the flow path 17q, the cooling water that has passed through the radiator 3, the cooling water that has passed through the heater 4, and/or the battery 6. and/or a flow path 17q that allows the cooling water that has passed through the radiator 3, the heater 4, and the battery 6 to flow through the other circulation path.

The first four-way valve 121 has a blocking state in which the communication paths 121A and 121B connect the ports that communicate with the same flow path, thereby blocking the flow path 17i and the flow path 17a, and a blocking state in which the flow path 17i and the flow path 17a are disconnected from each other. The communication state (arrow G1) of communication is switchable. Further, the second four-way valve 122 has a blocking state in which the communication paths 122A and 122B connect the ports that communicate with the same flow path, thereby blocking the flow path 17j and the flow path 17k, and a blocking state in which the flow path 17j and the flow path 17k are disconnected. It is configured such that the communication state (arrow G2) in which the communication state is communicated with can be switched. In addition, the first three-way valve 123 can be operated in a blocking state in which one of the communicating passages 123A is not connected to the port, thereby blocking the passage between the passage 17n and the passage 17o, and in a blocking state in which the passage 17n and the passage 17o are communicated with each other. The state (arrow G3) is configured to be switchable. The second three-way valve 124 operates in a blocking state in which one of the communicating paths 124A is not connected to the port, thereby blocking the flow path 17d and the flow path 17e, and in a blocking state in which the flow path 17d and the flow path 17e are communicated with each other. The state (arrow G4) is configured to be switchable.

As shown in FIG. 13(a), the flow path switching device 730 according to the eighth embodiment switches the first four-way valve 121 (first directional valve) by one (single) directional valve switching motor 31. , a second four-way valve 122 (second directional valve), a first three-way valve 123 (third directional valve), and a second three-way valve 124 (fourth directional valve). Note that in FIG. 13(a) showing a flow path switching device 730 according to the eighth embodiment, the number of ports is large, so the flow paths are omitted and the same ports are indicated by arrows in the same direction. However, like the other embodiments, each port will be described as being connected to each flow path.

Specifically, in the first four-way valve 121, eight ports 121a and eight ports 121b are arranged in the circumferential direction at 16 uniform positions, that is, at intervals of 22.5 degrees. It is formed of. Of these, the eight ports 121a are divided into eight ports with the same port function, and are connected in a branched manner with the flow path 17i. Similarly, the eight ports 121b are also formed into eight ports with the same port function, and are connected in a branched manner with the flow path 17a.

In addition, the second four-way valve 122 also has eight ports 122a and eight ports 122b arranged in the circumferential direction at 16 equal positions in the circumferential direction, that is, at intervals of 22.5 degrees. has been done. Of these, the eight ports 122a are formed into eight ports with the same port function, and are connected in a branched manner with the flow path 17j. Similarly, the eight ports 122b are also formed into eight ports with the same port function, and are connected in a branched manner with the flow path 17k.

Further, in the first three-way valve 123, eight ports 123b are formed in eight positions at equal positions in the circumferential direction, that is, at intervals of 22.5 degrees, and are lined up in a half circumference in the circumferential direction. . The eight ports 123b are formed into eight ports with the same port function, and the flow path 17o is connected in a branched manner.

Furthermore, eight ports 124b are formed in the second three-way valve 124 so as to be lined up in the circumferential direction at eight equal positions in the circumferential direction, that is, at intervals of 45 degrees. The eight ports 124b are formed into eight ports having the same port function, and are connected in a branched manner with the flow path 17e.

In the rotating part 121R of the first four-way valve 121, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 121A is located at one of the eight ports 121a in the figure. The first port from the upstream side in the clockwise rotational direction communicates with the fifth port from the upstream side in the clockwise rotational direction in the figure among the eight ports 121a, and the communication path 121B Of the eight ports 121b, the first port from the upstream side in the clockwise rotational direction in the figure, and among the eight ports 121b, the fifth port from the upstream side in the clockwise rotational direction in the figure. It is installed so that it is in a communicating position (that is, in a blocked state).

With this configuration, the first four-way valve 121 can control the communication when the above-mentioned cutoff state (first communication pattern) and communication state (second communication pattern) are considered as one communication pattern. The angle range that forms the pattern (blocking state or communicating state) is a rotation angle range (first rotation angle range) of 90 degrees, and the rotation angle (first rotation angle) at which the communication pattern (blocking and communicating) is switched is 0. degrees, 90 degrees, 180 degrees, and 270 degrees (see FIG. 13(b)). In other words, the first four-way valve 121 is set so that the communication pattern (blocking state or communication state) is switched in 1/4 rotation (1/4 cycle) of one rotation (1 cycle).

In addition, in the rotating part 122R of the second four-way valve 122, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication path 122A is located at one of the eight ports 122a. The third port from the upstream side in the clockwise rotational direction in the middle communicates with the seventh port from the upstream side in the clockwise rotational direction in the figure among the eight ports 122a, and the communication path 122B , the third port from the upstream side in the clockwise rotational direction in the figure among the eight ports 122b, and the seventh port from the upstream side in the clockwise rotational direction in the figure among the eight ports 122b. , are installed in a position where they are in communication (that is, in a blocked state).

With this configuration, the second four-way valve 122 can control the communication when the above-mentioned cutoff state (third communication pattern) and communication state (fourth communication pattern) are considered as one communication pattern. The rotation angle range (first rotation angle range) in which the angle range that forms the pattern (blocking state or communicating state) is 90 degrees, and the rotation angle (second rotation angle) at which the communication pattern (blocking and communicating) is switched is 45 degrees. degrees, 135 degrees, 225 degrees, and 315 degrees (see FIG. 13(b)). In other words, the second four-way valve 122 is set so that the communication pattern (blocking state or communication state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle), and The home position mounting angle is shifted by 45 degrees (that is, 1/8 rotation or 1/8 cycle) with respect to the first four-way valve 121.

Further, in the rotating part 123R of the first three-way valve 123, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication path 123A is connected to the port 123a and the eight ports 123b. It is installed so that it is in communication with the first port from the upstream side in the clockwise rotational direction in the figure (that is, in a communicating state).

With this configuration, when the first three-way valve 123 considers each of the above-mentioned communication state (fifth communication pattern) and cutoff state (sixth communication pattern) as one communication pattern, The angle range that forms the communication pattern (communication state or blocking state) is a rotation angle range (second rotation angle range) of 180 degrees, and the rotation angle at which the communication pattern (blocking pattern) is switched is 0 degrees or 180 degrees. (See FIG. 13(b)). In other words, the first three-way valve 123 is set so that the communication pattern (communication state or cutoff state) is switched in 1/2 rotation (1/2 cycle) out of 1 rotation (1 cycle), and The installation angle of the home position is the same (0 degree) with respect to the first four-way valve 121, and the installation angle of the home position with respect to the second four-way valve 122 is 45 degrees (that is, 1/8 rotation or 1/8 rotation). 8 cycles) are installed at different intervals.

Further, in the rotating part 124R of the second three-way valve 124, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication path 124A is one of the ports 124a and eight ports 124c. It is installed in a position that communicates with one port of the In other words, the rotating portion 124R is installed so that the communication path 124A is located at one of the eight ports separated from the flow path 17e as a home position (that is, in a communicating state).

By being configured in this way, the second three-way valve 124 has the following conditions when considering each of the above-mentioned communication state (seventh communication pattern) and cutoff state (eighth communication pattern) as one communication pattern: The angle range that forms the communication pattern (communicating state or blocking state) is a rotation angle range (third rotation angle range) of 22.5 degrees, and the rotation angle at which the communication pattern (blocking pattern) switches is from 0 degrees to 360 degrees. It is set to be 22.5 degrees in degrees (see FIG. 13(b)). In other words, the second three-way valve 124 is set so that the communication pattern (communication state or cutoff state) is switched in 1/16 revolution (1/16 cycle) of one revolution (one cycle), and The installation angle of the home position is the same (0 degree) with respect to the first four-way valve 121, and the installation angle of the home position with respect to the second four-way valve 122 is 45 degrees (that is, 1/8 rotation or 1/8 rotation). 8 cycles) are installed at different intervals.

As explained above, in the flow path switching device 730 according to the eighth embodiment, the angle of the rotary shaft 32 at which the communication pattern between the first four-way valve 121 and the second four-way valve 122 is switched is shifted by 45 degrees. The communication pattern of the first three-way valve 123 is different and the switching range is the same 90 degree range, and furthermore, the communication pattern of the first three-way valve 123 is set in a range of 180 degrees as the angle of the rotating shaft 32, and the second three-way valve 124 is It is configured such that the range in which the communication pattern is switched is within a range of 22.5 degrees as the angle of the rotating shaft 32. In short, the rotation angle of the rotating shaft 32 at which the communication patterns of the first four-way valve 121, the second four-way valve 122, the first three-way valve 123, and the second three-way valve 124 are switched, and the rotation of the rotating shaft 32 that forms each communication pattern. At least one of the angle range and the angle range are configured to be different from each other. In other words, the first four-way valve 121 and the second four-way valve 122 have the same cycle and are out of phase, and the first three-way valve 123 and the second three-way valve 124 are different from each other. are arranged to have different periods. Thereby, by moving the angle of the rotating shaft 32 by 22.5 degrees, the communication patterns in the first four-way valve 121, the second four-way valve 122, the first three-way valve 123, and the second three-way valve 124 are different from each other. All combinations can be achieved. Furthermore, the mechanism for rotationally driving the first four-way valve 121, the second four-way valve 122, the first three-way valve 123, and the second three-way valve 124 can be configured with only one directional valve switching motor 31 and the rotating shaft 32. That is, since a complicated mechanism such as a reduction gear can be made unnecessary, it is possible to downsize and cost down the flow path switching device 730 and the heat medium circulation system 10.

Note that the configuration, operation, and effects of the eighth embodiment other than this are the same as those of the first, fifth, sixth, and seventh embodiments, so the description thereof will be omitted.

<Ninth embodiment>
Next, a ninth embodiment, which is a partial modification of the first and seventh embodiments, will be described with reference to FIG. 14. FIG. 14(a) is a schematic diagram showing a flow path switching device according to the ninth embodiment, and FIG. 14(b) is a schematic diagram showing the angle of the rotation axis and each direction in the flow path switching device according to the ninth embodiment. It is a figure which shows the relationship with the communication pattern of a valve. Note that the ninth embodiment is configured by combining, for example, the first four-way valve in the first embodiment, the second four-way valve, and the second three-way valve in the seventh embodiment. That is, it is a combination of a directional valve that switches between a short-circuit state and a communication state, and a directional valve that switches between a cut-off state and a communication state. Therefore, although an example of a heat medium circulation system to which this embodiment can be applied will not be specifically described, for example, any one of the directional valves in the heat medium circulation system 10 described in the first embodiment and the seventh embodiment It is conceivable to use any two directional valves in the circulation path 16 of the heat medium circulation system described in the above embodiment.

As shown in FIG. 14(a), a flow path switching device 830 according to the ninth embodiment uses one (single) directional valve switching motor 31 as in the seventh embodiment. It rotationally drives three directional valves: a first four-way valve 125 (first directional valve), a second four-way valve 126 (second directional valve), and a second three-way valve 127 (third directional valve).

Specifically, the first four-way valve 125 has ports 125a1, 125a2, ports 125b1, 125b2, and ports 125c1, 125c2 at eight equal positions in the circumferential direction, that is, at intervals of 45 degrees. , ports 125d1 and 125d2 are formed. Of these, the ports 125a1 and 125a2 are formed into two parts with the same port function, and are connected in the form of one branched flow path. Similarly, the ports 125b1 and 125b2 are formed in two parts to function as the same port, and the other flow path in the circulation path that includes the flow path to which the ports 125a1 and 125a2 are connected is connected in a branched manner. Furthermore, similarly, the ports 125c1 and 125c2 are also formed into two parts as functions of the same port, and are connected in the form of one branched flow path. Similarly, the ports 125d1 and 125d2 are formed in two parts to function as the same port, and the other flow path in the circulation path that includes the flow path to which the ports 125c1 and 125c2 are connected is connected in a branched manner.

Further, the second four-way valve 126 has ports 126a1, 126a2, 126a3, 126a4 and ports 126b1, 126b2, 126b3, 126b4 at eight equal positions in the circumferential direction, that is, at intervals of 45 degrees. It is formed. Among these ports, the ports 126a1, 126a2, 126a3, and 126a4 are formed into four parts with the same port function, and are connected in the form of one branched flow path. Similarly, the ports 126b1, 126b2, 126b3, and 126b4 are divided into four ports and are connected to one another in a branched manner.

In addition, ports 127b1, 127b2, 127b3, and 127b4 are formed in the second three-way valve 127 at four equal positions in the circumferential direction, that is, at intervals of 45 degrees. The ports 127b1, 127b2, 127b3, and 127b4 are formed into four parts as functions of the same port, and are connected in the form of one branched flow path.

The rotating part 125R of the first four-way valve 125 has a communication passage 125A that communicates between the ports 125a2 and 125b2 when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees. The passage 125B is installed at a position where the port 125c2 and the port 125d2 communicate with each other. In other words, the rotating part 125R is installed so that the communication passages 125A and 126B are located at two ports (not shown) separated from the same circulation passage (that is, in a short-circuited state) as the home position. ing.

With this configuration, the first four-way valve 125 can combine each of the above-mentioned short circuit state (first communication pattern) and communication state (second communication pattern) into one communication pattern (that is, a plurality of different communication patterns). (including a pattern that communicates the flow path and a pattern that short-circuits the flow path), the angular range forming the communication pattern (short-circuit state or communication state) is a rotation angle range of 45 degrees, and the communication pattern (including the pattern that short-circuits the flow path) The rotation angles at which the rotation angles (communication with and communication) are switched are set to 0 degrees, 90 degrees, 180 degrees, and 270 degrees (see FIG. 14(b)). In other words, the first four-way valve 27 is set so that the communication pattern (blocking state or communication state) is switched in 1/4 rotation (1/4 cycle) of one rotation (1 cycle).

Further, in the rotating part 126R of the second four-way valve 126, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 126A communicates between the port 126a1 and the port 126a3. At the same time, the communication path 126B is installed at a position where the port 126b1 and the port 126b3 communicate with each other. That is, the rotating part 126R is installed so that the communication passages 126A and 126B are located at two ports (not shown) separated from the same flow passage (that is, in a blocked state) as a home position.

With this configuration, the second four-way valve 126 can perform each of the above-mentioned cutoff state (third communication pattern) and communication state (fourth communication pattern) into one communication pattern (that is, a plurality of different communication patterns). When considered as a communication pattern (including a pattern that communicates the flow path and a pattern that blocks the flow path), the angular range that forms the communication pattern (blocking state or communication state) is a rotation angle range of 90 degrees, and the communication pattern The rotation angles at which (blocking and communication) are switched are set to 45 degrees, 135 degrees, 225 degrees, and 315 degrees (see FIG. 13(b)). In other words, the second four-way valve 126 is set so that the communication pattern (communication state or cutoff state) is switched in 1/4 rotation (1/4 cycle) out of 1 rotation (1 cycle), and The home position is installed with an installation angle shifted by 45 degrees (that is, 1/8 rotation or 1/8 cycle) with respect to the first four-way valve 125.

Further, in the rotating part 127R of the second three-way valve 127, when the reference position of the rotation angle of the rotating shaft 32 set as the home position is 0 degrees, the communication passage 127A communicates between the port 127a and the port 127b4. It is installed in the same position. In other words, the rotating part 127R is configured such that the communication path 127A is located at the upstream port (for example, 127b4) in the clockwise rotation direction in the figure among the four ports separated from one flow path as the home position (i.e. installed so that they are in communication).

With this configuration, the second three-way valve 127 can perform each of the above-mentioned communication state (fifth communication pattern) and cutoff state (sixth communication pattern) into one communication pattern (that is, a plurality of different communication patterns). When considered as a communication pattern (including a pattern that communicates the flow path and a pattern that blocks the flow path), the angular range forming the communication pattern (communication state or blockage state) is a rotation angle range of 180 degrees, and the communication pattern The rotation angles at which communication and isolation are switched are set to 180 degrees and 0 degrees (see FIG. 14(b)). In other words, the second three-way valve 127 is set so that the communication pattern (communication state or cutoff state) is switched in 1/2 rotation (1/2 cycle) out of 1 rotation (1 cycle), and The installation angle of the home position is shifted by 90 degrees (that is, 1/4 rotation or 1/4 cycle) with respect to the first four-way valve 125, and the installation angle of the home position with respect to the second four-way valve 126 is 45 degrees. (that is, 1/8 rotation or 1/8 cycle).

As explained above, in the flow path switching device 830 according to the ninth embodiment, the angle of the rotation shaft 32, which switches the communication pattern between the first four-way valve 125 and the second four-way valve 126, is shifted by 45 degrees. They are different and have the same switching range of 90 degrees, and are configured such that the range of switching the communication pattern of the second three-way valve 127 is 180 degrees as the angle of the rotating shaft 32. In short, at least the rotation angle of the rotation shaft 32 at which the communication patterns of the first four-way valve 125, the second four-way valve 126, and the second three-way valve 127 are switched, and the rotation angle range of the rotation shaft 32 that forms each communication pattern. One is configured differently from the other. In other words, the first four-way valve 125 and the second four-way valve 126 have the same cycle but are out of phase, and the second three-way valve 127 has a different cycle from the first four-way valve 125 and the second four-way valve 126. It is configured. This makes it possible to achieve all combinations in which the communication patterns of the first four-way valve 125, the second four-way valve 126, and the second three-way valve 127 differ from each other by moving the angle of the rotating shaft 32 by 45 degrees. be able to. Moreover, the mechanism for rotationally driving these first four-way valve 125, second four-way valve 126, and second three-way valve 127 can be configured with only one directional valve switching motor 31 and rotating shaft 32, that is, a reduction gear, etc. Since a complicated mechanism can be omitted, it is possible to reduce the size and cost of the flow path switching device 830 and the heat medium circulation system 10.

Note that the configuration, operation, and effects of the ninth embodiment other than this are the same as those of the first and seventh embodiments, so the description thereof will be omitted.

<Possibilities of other embodiments>
In the first to ninth embodiments described above, the main flow path switching device 30, 130, 230, 330, 430, 530, 630, 730, 830 is connected to the heat medium circulation system 10 that circulates cooling water. Although we have described the application to this, the invention is not limited to this, and may be used in any device that requires switching two or more directional valves separately to achieve all communication patterns. . For example, it may be used in a hydraulic control device that supplies hydraulic pressure or lubricating oil, such as an automatic transmission, a hybrid drive device, or an electric drive device for an electric vehicle. In this case, oil is generally used as the heat medium fluid, but it is not limited to water or oil, and any fluid that can transport heat may be used.

Further, in the first to ninth embodiments, the heat medium circulation system 10 is described as one in which cooling water is circulated to the radiator 3, heater 4, motor 5, battery 6, etc., but the system is not limited to these, for example. It can be anything that cools or warms up things, such as evaporators, heat exchangers, electric askrs, various types of capacitors (including those for high-voltage power circuits), etc.

Further, in the first to ninth embodiments, in the flow path switching devices 30, 130, 230, 330, 430, 530, 630, 730, 830, two to four directional valves are connected to one directional valve switching motor. 31 has been described, however, it may be possible to switch five or more directional valves. In this case, the resolution for controlling the rotation angle of the rotation shaft 32 may be 11.25 degrees (1/32 period), or the rotation angle may be controlled at a finer angle.

Further, in the first to ninth embodiments, the flow path switching devices 30, 130, 230, 330, 430, 530, 630, 730, 830 achieve all combinations of communication patterns in each directional valve. However, this does not necessarily limit the use of all combinations when installed in the heat medium circulation system 10. For example, depending on the conditions of the vehicle in which it is installed, communication patterns that are not used may be used. There may be a combination.

10...Vehicle heat medium circulation system/11...First circulation path (circulation path)/12...Second circulation path (circulation path)/13...Third circulation path (circulation path)/14...Fourth circulation path (circulation path) path)/15...Circulation path/16...Circulation path/17...Circulation path/21...First three-way valve (directional valve, third directional valve)/21A...Communication path/21R...Rotating part/22...First four-way valve (Directional valve, first directional valve) /22A...Communication path/22B...Communicating path/22R...Rotating part/23...Second four-way valve (directional valve, second directional valve)/23A...Communicating path/23B...Communicating path /23R...Rotating part/24 in Fig. 5(a)...Second three-way valve (directional valve, second directional valve)/24...Second three-way valve (directional valve, fourth directional valve) in Fig. 7(a)/ 24A...Communication path/24R...Rotating part/25...First four-way valve (direction valve, first directional valve)/25A...Communication path/25B...Communication path/25R...Rotating part/26...Second three-way valve (directional valve) , second directional valve)/26A...Communication path/26B...Communication path/26R...Rotating part/27...First four-way valve (directional valve, first directional valve)/27A...Communication path/27B...Communication path/27R... Rotating part/28...Second four-way valve (directional valve, second directional valve)/28A...Communication path/28B...Communicating path/28R...Rotating part/29...Second three-way valve (directional valve, third directional valve)/ 29A...Communication path/29B...Communication path/29R...Rotating unit/30...Flow path switching device/31...Directional valve switching motor (rotating electric machine)/32...Rotating shaft (rotating member)/50...Control unit/121...No. 1 Four-way valve (directional valve, first directional valve) / 121A... Communication passage / 121B... Communication passage / 121R... Rotating part / 122... Second four-way valve (directional valve, second directional valve) / 122A... Communication passage / 122B …Communication passage/122R…Rotating part/123…First three-way valve (directional valve, third directional valve)/123A…Communication passage/123B…Communication passage/123R…Rotating part/124…Second three-way valve (directional valve, 4th direction valve)/124A...Communication path/124B...Communication path/124R...Rotating part/125...First four-way valve (directional valve, first directional valve)/125A...Communication path/125B...Communication path/125R...Rotation Part/126...Second four-way valve (directional valve, second directional valve)/126A...Communication passage/126B...Communication passage/126R...Rotating part/127...First three-way valve (directional valve, third directional valve)/127A ...Communication path/127B...Communication path/127R...Rotating section/130...Flow path switching device/230...Flow path switching device/330...Flow path switching device/430...Flow path switching device/530...Flow path switching device/630 ...Flow path switching device/730...Flow path switching device/830...Flow path switching device

Claims (7)

A rotating electric machine that outputs rotation,
a rotating member whose rotation angle is changed by rotation of the rotating electrical machine;
At least one communication path is formed that is rotated in conjunction with the rotation of the rotating member, is disposed so as to be interposed between the plurality of flow paths, and is capable of communicating two flow paths among the plurality of flow paths. a plurality of directional valves having a rotating part and forming a plurality of different communication patterns in which any one of the plurality of flow paths is communicated through the communication path depending on a rotation angle of the rotating part;
A control unit that controls the rotating electric machine,
The rotating parts of each of the plurality of directional valves rotate at the same rotational speed due to rotation of the rotating member,
In each of the plurality of directional valves, at least one of the rotation angle of the rotary member at which communication patterns are switched among the plurality of communication patterns and the rotation angle range of the rotary member forming each communication pattern are mutually different. configured differently,
The control unit controls the rotating electrical machine to control the rotation angle of the rotating member, thereby achieving all combinations in which the communication patterns in the plurality of directional valves are different from each other.
Flow path switching device. A rotating electric machine that outputs rotation,
a rotating member whose rotation angle is changed by rotation of the rotating electrical machine;
At least one communication path is formed that is rotated in conjunction with the rotation of the rotating member, is disposed so as to be interposed between the plurality of flow paths, and is capable of communicating two flow paths among the plurality of flow paths. A different pattern comprising a rotating part, and including a pattern in which any of the plurality of channels is communicated by the communication path and a pattern in which any of the plurality of channels is blocked depending on the rotation angle of the rotating part. a plurality of directional valves forming a plurality of communication patterns;
A control unit that controls the rotating electric machine,
The rotating parts of each of the plurality of directional valves rotate at the same rotational speed due to rotation of the rotating member,
In each of the plurality of directional valves, at least one of the rotation angle of the rotary member at which communication patterns are switched among the plurality of communication patterns and the rotation angle range of the rotary member forming each communication pattern are mutually different. configured differently,
The control unit controls the rotating electrical machine to control the rotation angle of the rotating member, thereby achieving all combinations in which the communication patterns in the plurality of directional valves are different from each other.
Flow path switching device. The plurality of directional valves are
a first directional valve forming a first communication pattern and a second communication pattern as the plurality of communication patterns;
The plurality of communication patterns include a second directional valve forming a third communication pattern and a fourth communication pattern,
a first rotation angle of the rotating member at which the first communication pattern and the second communication pattern are switched; and a second rotation angle of the rotating member at which the third communication pattern and the fourth communication pattern are switched; are configured differently,
The flow path switching device according to claim 1 or 2. The plurality of directional valves are
a first directional valve forming a first communication pattern and a second communication pattern as the plurality of communication patterns;
a second directional valve forming a third communication pattern and a fourth communication pattern as the plurality of communication patterns;
The plurality of communication patterns include a third directional valve forming a fifth communication pattern and a sixth communication pattern,
a first rotation angle of the rotating member at which the first communication pattern and the second communication pattern are switched; and a second rotation angle of the rotating member at which the third communication pattern and the fourth communication pattern are switched; are different,
a first rotation angle range of the rotating member forming the first communication pattern, the second communication pattern, the third communication pattern, and the fourth communication pattern, respectively; the fifth communication pattern and the sixth communication pattern; and second rotation angle ranges of the rotating member that respectively form
The flow path switching device according to claim 1 or 2. The plurality of directional valves are
a first directional valve forming a first communication pattern and a second communication pattern as the plurality of communication patterns;
a second directional valve forming a third communication pattern and a fourth communication pattern as the plurality of communication patterns;
a third directional valve forming a fifth communication pattern and a sixth communication pattern as the plurality of communication patterns;
The plurality of communication patterns include a fourth direction valve forming a seventh communication pattern and an eighth communication pattern,
a first rotation angle of the rotating member at which the first communication pattern and the second communication pattern are switched; and a second rotation angle of the rotating member at which the third communication pattern and the fourth communication pattern are switched; are different,
a first rotation angle range of the rotating member forming the first communication pattern, the second communication pattern, the third communication pattern, and the fourth communication pattern, respectively; the fifth communication pattern and the sixth communication pattern; and a third rotation angle range of the rotating member that respectively forms the seventh communication pattern and the eighth communication pattern are configured to be different from each other. ,
The flow path switching device according to claim 1 or 2. The control unit determines a combination of the communication patterns in the plurality of directional valves, determines a rotation angle of the rotary member that corresponds to the determined combination of the communication patterns, and determines the rotation angle of the rotary member based on the current rotation angle of the rotary member. rotating the rotating member in a direction in which the rotational movement becomes smaller when the rotating member is rotated to a rotation angle of the rotating member;
The flow path switching device according to claim 1 or 2. a plurality of circulation paths through which a heat medium is circulated;
A flow path switching device according to claim 1 or 2,
Each of the plurality of directional valves is configured to be able to switch two of the plurality of circulation paths into a communicating state and a blocking state in which they are cut off by switching the communication pattern,
The control unit determines a combination of the communication patterns in the plurality of directional valves by determining a circulation state in which the heat medium is circulated in the plurality of circulation paths and a non-circulation state in which the heat medium is not circulated, and the combination of the communication patterns in the plurality of directional valves. determining a rotation angle of the rotating member that is a combination of patterns, and controlling the rotation angle of the rotating member to be the determined rotation angle;
Vehicle heat medium circulation system.

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