JP2020133657A - Fluid valve device - Google Patents

Abstract

To provide a fluid valve device capable of being downsized.SOLUTION: A fluid valve device comprises: a body section 1 which has a first volume chamber 11, a second volume chamber 12 and a third volume chamber 13 and forms a flow passage of fluid; a flow passage section 3 which has a first inflow passage 31 communicated with the first volume chamber, a first outflow passage 32 communicated with the first volume chamber, a second inflow passage 33 communicated with the second volume chamber, a second outflow passage 34 communicated with the second volume chamber, a first bypass 35 communicating the first volume chamber with the second volume chamber, a second bypass 36 communicating the second inflow passage with the third volume chamber, and a third bypass 37 communicating the third volume chamber with the first outflow passage; a valve section 6 which has a first valve Va opening and closing the flow passage between the first volume chamber and the first outflow passage, a second valve Vb opening and closing the flow passage between the second inflow passage and the second volume chamber, a third valve Vc opening and closing the flow passage between the first volume chamber and the second volume chamber, and a fourth valve Vd opening and closing the flow passage between the third volume chamber and the second bypass; and an opening and closing valve drive section 7 which drives the first valve, the second valve, the third valve, and the fourth valve.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fluid valve device.

As a fluid valve device, a device that switches a fluid flow path in a plurality of directions is known. Examples of the fluid valve device include those mounted on an EV vehicle or the like and switching the flow path of the coolant.

A general EV vehicle is equipped with a motor / inverter and a battery. Since the motor / inverter and the battery generate heat as the vehicle is driven, this type of vehicle is provided with a vehicle cooling system for cooling them. The vehicle cooling system has a coolant flow path, which is connected to the cooler in addition to the motor inverter and battery. The coolant flowing through the flow path exchanges heat between the cooler and the motor inverter and battery serving as a heat source, thereby cooling the motor inverter and battery.

The control temperature differs between the motor / inverter and the battery, and in general, the control temperature of the battery is lower than the control temperature of the motor / inverter. Therefore, under normal operating conditions, the motor / inverter and the battery are generally cooled by separate coolers having different cooling performances.
A chiller including a heat pump is exemplified as a cooler for a battery, and an air-cooled radiator is exemplified as a cooler for a motor / inverter.

By the way, the amount of heat generated by the motor / inverter may increase depending on the traveling condition and environment of the EV vehicle. In this case, it is considered better to cool the motor / inverter with a cooler having excellent cooling performance. For this reason, in a general vehicle cooling system, when the heat generation amount of the motor / inverter rises significantly, the flow path of the fluid, that is, the coolant is switched in different directions, and the motor / inverter is cooled by the cooler for the battery. are doing.

In order to switch the coolant flow path in different directions, a plurality of flow paths and a plurality of valves for opening and closing the plurality of flow paths are required.

The relationship between a general vehicle cooling system and a valve will be described with reference to FIGS. 5 and 6.
First, in the vehicle cooling system shown in FIGS. 5 and 6, the valve usually connects the battery B and the chiller C, and also connects the motor inverter M and the radiator R. Further, when the heat generation amount of the motor / inverter M increases, the battery B, the motor / inverter M, and the chiller C are connected. In either case, the chiller C and the battery B may always be connected by the flow path pX, and the radiator R and the motor / inverter M may always be connected by the flow path pY.

In this type of vehicle cooling system, as the flow path of the coolant other than the above-mentioned flow path pX and flow path pY, the flow path pA connecting the battery B and the chiller C, the motor inverter M and the radiator R are connected. It is considered that there are four flow paths pB, a flow path pC for connecting the battery B and the motor / inverter M, and a flow path pD for connecting the radiator R and the chiller C. As for the valve, it is considered that there are four valves: a valve VA that opens and closes the flow path pA, a valve VB that opens and closes the flow path pB, a valve VC that opens and closes the flow path pC, and a valve VD that opens and closes the flow path pD.

As shown in FIG. 5, when the valve VA and the valve VB are opened and the valve VC and the valve VD are closed, the battery B and the chiller C are connected by the flow path pA, and the motor inverter M and the radiator are connected by the flow path pB. R is connected. In this case, the coolant flows from the battery B in the order of flow path pA → chiller C → flow path pX and returns to the battery B, and from the motor / inverter M in the order of flow path pY → radiator R → flow path pB. It circulates through two routes, one that returns to the motor / inverter M.
Therefore, in this case, the battery B can be cooled by the chiller C, and the motor inverter M can be cooled by the radiator R.

Further, as shown in FIG. 6, when the valve VC and the valve VD are opened and the valve VA and the valve VB are closed, the battery B and the motor inverter M are connected by the flow path pC, and the radiator R is connected by the flow path pD. And the chiller C are connected. In this case, the coolant circulates from the battery B in the order of flow path pC → motor inverter M → flow path pY → radiator R → flow path pD → chiller C → flow path pX and returns to the battery B.
Therefore, in this case, both the battery B and the motor / inverter M can be cooled by the chiller C.

By the way, in the vehicle cooling system shown in FIGS. 5 and 6, it is necessary to open and close the four valves VA to VD while synchronizing them with each other. When a plurality of valves are synchronized, if the plurality of valves are opened and closed separately, there is a problem that the fluid valve device becomes large and the cost required for the fluid valve device increases. In recent years, there has been an active demand for miniaturization and weight reduction of vehicle components, and large fluid valve devices do not meet this type of demand.

Here, it is considered that a plurality of valves can be operated individually and synchronously by using, for example, a cam and a stepping motor as introduced in Patent Document 1.
However, even in this case, the four flow paths pA to pD are still required, and it is still difficult to miniaturize the fluid valve device.

Jikkenhei 4-134903

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a miniaturized fluid valve device.

The fluid valve device of the present invention that solves the above problems
A main body having a first volume chamber, a second volume chamber, and a third volume chamber and serving as a fluid flow path,
A first inflow passage connecting to the first volume chamber, a first outflow passage connecting to the first volume chamber, a second inflow passage connecting to the second volume chamber, and a second outflow connecting to the second volume chamber. A road, a first bypass connecting the first volume chamber and the second volume chamber, a second bypass connecting the second inflow passage and the third volume chamber, and the third volume chamber and the first volume chamber. 1 A flow path portion having a third bypass connecting the outflow path and
A first valve that opens and closes between the first volume chamber and the first outflow passage, a second valve that opens and closes between the second inflow passage and the second volume chamber, the first volume chamber and the first volume chamber. A valve portion having a third valve that opens and closes between the two volume chambers and a fourth valve that opens and closes between the third volume chamber and the second bypass.
The first valve, the second valve, the third valve, and the on-off valve drive unit for driving the fourth valve are provided.
The on-off valve drive unit opens the first valve, opens the second valve, closes the third valve, and closes the fourth valve.
A fluid valve device for switching between a second mode in which the first valve is closed, the second valve is closed, the third valve is opened, and the fourth valve is opened.

The fluid valve device of the present invention can be miniaturized.

It is explanatory drawing which shows typically the valve device for fluids of Example 1. FIG. It is explanatory drawing which shows typically the valve device for fluids of Example 1. FIG. It is explanatory drawing which shows typically the cooling system for a vehicle provided with the fluid valve device of Example 1. FIG. It is explanatory drawing which shows typically the cooling system for a vehicle provided with the fluid valve device of Example 1. FIG. It is explanatory drawing which shows typically the general cooling system for a vehicle. It is explanatory drawing which shows typically the general cooling system for a vehicle.

The fluid valve device of the present invention switches the fluid flow path in two different directions. The fluid circulated in the fluid valve device of the present invention may be a coolant or a fluid used for other purposes. The fluid is not limited to a liquid, and may be, for example, a gas. Therefore, the fluid valve device of the present invention can be used as a part of the conventional vehicle cooling system described above, or can be used for other purposes.

Hereinafter, the fluid valve device of the present invention will be described with reference to specific examples.

(Example 1)
1 and 2 are explanatory views schematically showing the fluid valve device of the first embodiment. 3 and 4 are explanatory views schematically showing a vehicle cooling system including the fluid valve device of the first embodiment.
Specifically, in FIGS. 1 and 3, the fluid valve device of the first embodiment is in the first mode, and in FIGS. 2 and 4, the fluid valve device of the first embodiment is in the second mode. The first mode and the second mode will be described later.

First, the fluid valve device of the first embodiment will be described.
As shown in FIG. 1, the fluid valve device of the first embodiment has a main body portion 1, a flow path portion 3, a valve portion 6, and an on-off valve drive portion 7.

The main body 1 has a first volume chamber 11, a second volume chamber 12, and a third volume chamber 13. The main body 1 is partitioned by a main outer cylinder 20, a first partition wall 21, a second partition wall 22, and a lid 29. The axial direction of the main outer cylinder 20 coincides with the vertical direction shown in FIG.

The main outer cylinder 20 has a bottomed substantially cylindrical shape with one end in the axial direction open and the other end closed. The lid 29 covers one end of the main outer cylinder 20 in the axial direction. The first partition wall 21 and the second partition wall 22 are arranged inside the main outer cylinder 20 in the axial direction of the main outer cylinder 20. The inside of the main outer cylinder 20 is formed by the first partition wall 21 and the second partition wall 22 of the first volume chamber 11, the second volume chamber 12, and the third volume chamber 13 along the axial direction of the main outer cylinder 20. It is divided into three areas.

The first partition wall 21 is arranged above the second partition wall 22, and the three regions inside the main outer cylinder 20 are the first volume chamber 11, the second volume chamber 12, and the first volume chamber 12 from the upper side to the lower side. 3 Volume chambers 13 are arranged in this order. The first partition wall 21 and the second partition wall 22 have a substantially ring shape, and the camshaft 70 of the on-off valve drive unit 7, which will be described later, is inserted into the central portion thereof.

The lid 29 has a bottomed substantially cylindrical shape with one end side in the axial direction closed and the other end side open. The lid 29 is arranged coaxially with the main outer cylinder 20, and has a built-in shaft input portion 79 for driving the cam shaft 70. The axial length of the lid 29 is shorter than the axial length of the main outer cylinder 20.

The flow path portion 3 has a first inflow passage 31, a first outflow passage 32, a second inflow passage 33, a second outflow passage 34, a first bypass 35, a second bypass 36, and a third bypass 37.

The first inflow path 31 is partitioned inside the first inflow tube 41 having a substantially tubular shape. The first outflow passage 32 is also partitioned inside the first outflow cylinder 42 having a substantially tubular shape. The first inflow cylinder 41 and the first outflow cylinder 42 are each integrated into a portion of the main outer cylinder 20 that partitions the first volume chamber 11. The first inflow passage 31 and the first outflow passage 32 each communicate with the first volume chamber 11.

The second inflow path 33 is partitioned inside the second inflow tube 43 having a substantially tubular shape. The second outflow passage 34 is also partitioned inside the second outflow cylinder 44 which has a substantially tubular shape. The second inflow cylinder 43 and the second outflow cylinder 44 are each integrated into a portion of the main outer cylinder 20 that partitions the second volume chamber 12. Then, the second inflow passage 33 and the second outflow passage 34 each communicate with the second volume chamber 12.

The first partition wall 21 is provided with a through hole for connecting the first volume chamber 11 and the second volume chamber 12. The through hole corresponds to the first bypass 35. Therefore, the first bypass 35 connects the first volume chamber 11 and the second volume chamber 12.

The second bypass 36 is partitioned inside a bottomed substantially tubular second bypass cylinder 46 in which one end in the axial direction is closed and the other end is open. The second bypass cylinder 46 is arranged substantially parallel to the second inflow cylinder 43.

The other end of the second bypass cylinder 46 in the axial direction is integrated with the portion of the main outer cylinder 20 that partitions the third volume chamber 13, and slightly penetrates into the main outer cylinder 20. Therefore, the second bypass 36 communicates with the third volume chamber 13 through the other end in the axial direction of the second bypass cylinder 46.
On the other hand, the peripheral wall of the second bypass cylinder 46 is integrated with the peripheral wall of the second inflow cylinder 43. A through hole 39 that penetrates the peripheral wall of the second bypass cylinder 46 and the peripheral wall of the second inflow cylinder 43 is provided in the integrated portion. Therefore, the second bypass 36 communicates with the second inflow path 33 through the through hole 39. The second bypass 36 connects the second inflow path 33 and the third volume chamber 13.

The third bypass 37 is partitioned inside the tubular third bypass cylinder 47. One end in the axial direction of the third bypass cylinder 47 is integrated with a portion of the main outer cylinder 20 that partitions the third volume chamber 13, and the third bypass 37 and the third volume chamber 13 are in communication with each other. Further, the other end of the third bypass cylinder 47 in the axial direction is integrated with the peripheral wall of the first outflow cylinder 42, and the third bypass 37 and the first outflow passage 32 are in communication with each other.
The first outflow passage 32 is located above the third volume chamber 13. Therefore, the end of the third bypass 37 on the first outflow path 32 side is located above the end of the third bypass 37 on the third volume chamber 13 side.

The valve portion 6 has a first valve Va, a second valve Vb, a third valve Vc, and a fourth valve Vd. The first valve Va to the fourth valve Vd are poppet type valves having substantially the same shape. The first valve Va to the fourth valve Vd are attached with the base 60, the valve body 61, the urging element 62 interposed between the base 60 and the valve body 61, and the valve body 61, respectively. It has a valve seat 63, which is on the opposite side of the force element 62. The valve seat 63 is provided with a through hole, and the valve body 61 has a pin-shaped pressure receiving portion 64 inserted through the through hole. The urging element 62 is a compression coil spring that is compressed and accumulates urging force.

Of these, the first valve Va is arranged between the first outflow passage 32 and the first volume chamber 11.
Specifically, the valve seat 63 of the first valve Va has a substantially ring shape having a through hole, and is integrated with the end portion of the first outflow cylinder 42 on the main outer cylinder 20 side. It can be said that the valve seat 63 of the first valve Va is exposed to the first outflow passage 32. The base 60, the urging element 62, and the portion of the valve body 61 on the urging element 62 side are arranged inside the first outflow cylinder 42. Of these, the substrate 60 is fixed to the first outflow tube 42. The urging element 62 and the valve body 61 can change their positions or states.

The portion of the valve body 61 on the pressure receiving portion 64 side is inserted into the through hole of the valve seat 63 and arranged inside the main outer cylinder 20, specifically, in the first volume chamber 11. The valve body 61 is urged by the urging element 62 in the direction of being seated on the valve seat 63, that is, in the direction in which the first valve Va is closed. When the pressure receiving portion 64 is pressed toward the base 60 side, that is, the first outflow path 32 side, the urging element 62 is compressed, and the valve body 61 is separated from the valve seat 63, that is, the first valve Va is opened. The position changes in the direction. Therefore, the first valve Va can open and close between the first outflow passage 32 and the first volume chamber 11.

The second valve Vb is arranged between the second inflow path 33 and the second volume chamber 12.
Specifically, the valve seat 63 of the second valve Vb has a substantially ring shape having a through hole, and is integrated with the end portion of the second inflow cylinder 43 on the main outer cylinder 20 side. It can be said that the valve seat 63 of the second valve Vb is exposed to the second inflow path 33. The portion of the valve body 61 of the second valve Vb on the pressure receiving portion 64 side is inserted into the through hole of the valve seat 63 and is arranged inside the main outer cylinder 20, specifically, in the second volume chamber 12. The second valve Vb can open and close between the second inflow path 33 and the second volume chamber 12 by the same mechanism as the first valve Va.

The third valve Vc is arranged between the first volume chamber 11 and the second volume chamber 12.
Specifically, the valve seat 63 of the third valve Vc has a substantially ring shape having a through hole and is integrated with the first partition wall 21. It can be said that the valve seat 63 of the third valve Vc is exposed to the first bypass 35. The portion of the valve body 61 of the third valve Vc on the pressure receiving portion 64 side is inserted into the through hole of the valve seat 63 and arranged in the first volume chamber 11. The third valve Vc opens and closes between the first volume chamber 11 and the second volume chamber 12 by the same mechanism as the first valve Va.

The fourth valve Vd is arranged between the third volume chamber 13 and the second bypass 36.
Specifically, the valve seat 63 of the fourth valve Vd has a substantially ring shape having a through hole, and is integrated with the end portion of the second bypass cylinder 46 on the main outer cylinder 20 side. It can be said that the valve seat 63 of the fourth valve Vd is exposed to the second bypass 36. The portion of the valve body 61 of the fourth valve Vd on the pressure receiving portion 64 side is inserted into the through hole of the valve seat 63 and arranged in the third volume chamber 13. The fourth valve Vd opens and closes between the second bypass 36 and the third volume chamber 13 by the same mechanism as the first valve Va.

The on-off valve drive unit 7 has a cam shaft 70, a first cam 71, a second cam 72, and a third cam 73. The first cam 71, the second cam 72, and the third cam 73 are each integrated with the cam shaft 70.
The camshaft 70 is arranged inside the main outer cylinder 20. As described above, the camshaft 70 is inserted into the central portion of the ring-shaped first partition wall 21 and the second partition wall 22. Therefore, the camshaft 70 and the main outer cylinder 20 are arranged substantially coaxially. A handle-shaped shaft input portion 79 is provided integrally with the camshaft 70 on one end side of the camshaft 70 in the axial direction.

The shaft input portion 79 is arranged inside the lid 29, and forms a part of the stepping motor together with other members arranged inside the lid 29. The inside of the lid 29 and the inside of the main outer cylinder 20 are separated and sealed by a partition wall (not shown).
The camshaft 70 is rotationally driven by a stepping motor that includes a shaft input section 79. The first cam 71, the second cam 72, and the third cam 73 integrated with the camshaft 70 are also rotatable integrally with the camshaft 70. That is, it can be said that the on-off valve drive unit 7 having the camshaft 70, the first cam 71, the second cam 72, and the third cam 73 is rotationally driven by the stepping motor.

The first cam 71, the second cam 72, and the third cam 73 each have an eccentric substantially plate shape.

The first cam 71 has a pressing portion Ia and a pressing portion Ic, and is arranged in the first volume chamber 11.
The pressing portion Ia is composed of a part of the radial end portion of the first cam 71. The distance between the pressure receiving portion 64 of the first valve Va and the axial center Lo of the camshaft 70 when the valve body 61 is seated on the valve seat 63 is Wa (not shown). Further, the distance between the axial center Lo of the camshaft 70 and the pressing portion Ia is W1 (not shown). The relationship between the distance Wa and the distance W1 is W1> Wa in the first mode shown in FIG. 1 and W1 ≦ Wa in the second mode shown in FIG. Therefore, the pressing portion Ia presses the pressure receiving portion 64 of the first valve Va in the first mode shown in FIG. 1, and does not press the pressure receiving portion 64 of the first valve Va in the second mode shown in FIG.

The pressing portion Ic is composed of a part of the axial end surface of the first cam 71 on the side facing the first partition wall 21. Of the first cam 71, the axial end surface 71s on the side facing the first partition wall 21 has a substantially planar shape orthogonal to the axial center Lo of the cam shaft 70. Further, the axial end surface of the first cam 71 on the side facing the first partition wall 21 partially protrudes toward the first partition wall 21. Therefore, it can be said that the axial thickness of the first cam 71 is partially different, and the pressing portion Ic is a portion of the axial end surface of the first cam 71 that protrudes toward the first partition wall 21 side.

The distance between the pressure receiving portion 64 of the third valve Vc when the valve body 61 is seated on the valve seat 63 and the axial end surface 71s of the first cam 71 on the side facing the first partition wall 21 is Wc ( (Fig. Omitted). Further, the distance between the axial end surface 71s on the side of the first cam 71 facing back to the first partition wall 21 and the pressing portion Ic is W3 (not shown). The relationship between the distance Wc and the distance W3 is W3 ≦ Wc in the first mode shown in FIG. 1 and W3> Wc in the second mode shown in FIG. Therefore, the pressing portion Ic presses the pressure receiving portion 64 of the third valve Vc in the second mode shown in FIG. 2, and does not press the pressure receiving portion 64 of the third valve Vc in the first mode shown in FIG.

The second cam 72 has a pressing portion Ib and is arranged in the second volume chamber 12.
The pressing portion Ib is composed of a part of the radial end portion of the second cam 72. The distance between the pressure receiving portion 64 of the second valve Vb and the axial center Lo of the camshaft 70 when the valve body 61 is seated on the valve seat 63 is Wb (not shown). Further, the distance between the axial center Lo of the camshaft 70 and the pressing portion Ib is W2 (not shown). The relationship between the distance Wb and the distance W2 is W2> Wb in the first mode shown in FIG. 1 and W2 ≦ Wb in the second mode shown in FIG. Therefore, the pressing portion Ib presses the pressure receiving portion 64 of the second valve Vb in the first mode shown in FIG. 1, and does not press the pressure receiving portion 64 of the second valve Vb in the second mode shown in FIG.

The third cam 73 has a pressing portion Id and is arranged in the third volume chamber 13.
The pressing portion Id is composed of a part of the radial end portion of the third cam 73. The distance between the pressure receiving portion 64 of the fourth valve Vd and the axial center Lo of the camshaft 70 when the valve body 61 is seated on the valve seat 63 is Wd (not shown). Further, the distance between the axial center Lo of the camshaft 70 and the pressing portion Id is W4 (not shown). The relationship between the distance Wd and the distance W4 is W4 ≦ Wd in the first mode shown in FIG. 1 and W4> Wd in the second mode shown in FIG. Therefore, the pressing portion Id presses the pressure receiving portion 64 of the fourth valve Vd in the second mode shown in FIG. 2, and does not press the pressure receiving portion 64 of the fourth valve Vd in the first mode shown in FIG.

The operation of the fluid valve device of the first embodiment will be described below.

(1st mode)
First, in the first mode shown in FIG. 1, the pressing portion Ia of the on-off valve driving unit 7 presses the pressure receiving portion 64 of the first valve Va, and the pressing portion Ib presses and presses the pressure receiving portion 64 of the second valve Vb. The portion Ic does not press the pressure receiving portion 64 of the third valve Vc, and the pressing portion Id does not press the pressure receiving portion 64 of the fourth valve Vd. Therefore, in the first mode, the on-off valve drive unit 7 opens the first valve Va and the second valve Vb, and closes the third valve Vc and the fourth valve Vd.

Therefore, in the first mode, the fluid valve device of the first embodiment has the first path fr1 in which the fluid flows in the order of the first inflow path 31 → the first volume chamber 11 → the first outflow path 32, and the second. A second path fr2 through which the fluid flows in the order of the inflow path 33 → the second volume chamber 12 → the second outflow path 34 is formed.

(Second mode)
By rotationally driving the on-off valve drive unit 7 with the stepping motor, the fluid valve device of the first embodiment can be switched from the first mode to the second mode.
In the second mode shown in FIG. 2, the pressing portion Ia of the on-off valve drive unit 7 does not press the pressure receiving portion 64 of the first valve Va, and the pressing portion Ib does not press the pressure receiving portion 64 of the second valve Vb. The portion Ic presses the pressure receiving portion 64 of the third valve Vc, and the pressing portion Id presses the pressure receiving portion 64 of the fourth valve Vd. Therefore, in the second mode, the on-off valve drive unit 7 closes the first valve Va and the second valve Vb, and opens the third valve Vc and the fourth valve Vd.

By the way, in the first mode shown in FIG. 1, when the second valve Vb is opened, the through hole 39 penetrating the peripheral wall of the second bypass cylinder 46 and the peripheral wall of the second inflow cylinder 43 is formed in the second valve Vb. It is closed by the valve body 61.
When the fluid valve device is switched from the first mode to the second mode and the second valve Vb is closed, the valve body 61 of the second valve Vb changes its position to open the through hole 39. Therefore, in the second mode, the second inflow path 33 and the second bypass 36 are in contact with each other.

Therefore, in the second mode, the fluid flows through the fluid valve device of the first embodiment in the order of the first inflow passage 31 → the first volume chamber 11 → the second volume chamber 12 → the second outflow passage 34. The path fr3 and the fourth path fr4 through which the fluid flows in the order of the second inflow path 33 → the second bypass 36 → the third volume chamber 13 → the third bypass 37 → the first outflow path 32 are formed.

Hereinafter, a vehicle cooling system including the fluid valve device of the first embodiment will be described. The vehicle cooling system is referred to as the vehicle cooling system of the first embodiment.
As shown in FIG. 3, in the vehicle cooling system of the first embodiment, in addition to the fluid valve device VS of the first embodiment, the coolant flow path r, the battery B, the motor inverter M1, the motor inverter M2, and the chiller C , Radiator R, infusion pump P1 and infusion pump P2.

Of these, the coolant flow path r is a flow path r1 that connects the battery B and the fluid valve device VS, a flow path r2 that connects the fluid valve device VS and the chiller C, and a flow that connects the chiller C and the infusion pump P1. Path r3, flow path r4 connecting the infusion pump P1 and the battery B, flow path r5 connecting the motor inverter M1 and the radiator R, flow path r6 connecting the radiator R and the fluid valve device VS, for fluids. The flow path r7 connecting the valve device VS and the infusion pump P2, the flow path r8 connecting the infusion pump P2 and the motor inverter M1, the flow path r9 connecting the radiator R and the motor inverter M2, and the motor. It has a flow path r10 that connects the inverter M2 and the radiator R. The flow path r10 is more accurately connected to the flow path r5 that connects the motor inverter M1 and the radiator R.

The flow path r1 is connected to the first inflow path 31 of the fluid valve device VS, the flow path r2 is connected to the first outflow path 32 of the fluid valve device VS, and the flow path r6 is the fluid valve device VS. It is connected to the second inflow path 33, and the flow path r7 is connected to the second outflow path 34 of the fluid valve device VS.

The flow path of the coolant in the vehicle cooling system of the first embodiment when the fluid valve device VS of the first embodiment is in the first mode will be described.

In the fluid valve device VS in the first mode shown in FIG. 1, a first path fr1 in which fluid flows in the order of a first inflow path 31 → a first volume chamber 11 → a first outflow path 32, and a second inflow path A second path fr2 through which the fluid flows in the order of 33 → the second volume chamber 12 → the second outflow path 34 is formed.
As described above, the flow path r1 of the vehicle cooling system is connected to the first inflow path 31, the flow path r2 of the vehicle cooling system is connected to the first outflow path 32, and the flow path r2 of the vehicle cooling system is connected to the second inflow path 33. Is connected to the flow path r6 of the vehicle cooling system, and the flow path r7 of the vehicle cooling system is connected to the second outflow passage 34. Therefore, at this time, the fluid valve device VS communicates the flow path r1 and the flow path r2 by the first path fr1, and connects the flow path r6 and the flow path r7 by the second path fr2.

Therefore, as shown by the black arrow in FIG. 3, in the first mode, the coolant that has been warmed by cooling the battery B when passing through the battery B is the flow path r1 → the fluid valve device VS → the flow path. It circulates in the order of r2 and flows into the chiller C. Then, the coolant cooled by the chiller C circulates in the order of the flow path r3 → the infusion pump P1 → the flow path r4 and is returned to the battery B.

Further, in the first mode, the coolant cooled and warmed by the motor inverter M1 flows into the radiator R through the flow path r5. Further, the coolant that has been cooled and warmed by the motor / inverter M2 flows in the order of the flow path r10 → the flow path r5 and flows into the radiator R. A part of the coolant cooled by the radiator R flows in the order of flow path r6 → fluid valve device VS → flow path r7 → infusion pump P2 → flow path r8 and is returned to the motor inverter M1. The rest of the coolant cooled by the radiator R is returned to the motor inverter M2 through the flow path r9.

When the motor / inverter is operated continuously for a long time or when the outside air temperature is high, the temperature of the motor / inverter becomes high, and it becomes difficult to sufficiently cool the motor / inverter with the radiator alone. In the vehicle cooling system shown in FIG. 3, in such a case, the stepping motor is driven to switch the fluid valve device VS from the first mode shown in FIG. 1 to the second mode shown in FIG.

In the fluid valve device VS in the second mode shown in FIG. 2, the third path fr3 through which the fluid flows in the order of the first inflow path 31 → the first volume chamber 11 → the second volume chamber 12 → the second outflow path 34. And the fourth path fr4 in which the fluid flows in the order of the second inflow path 33 → the second bypass 36 → the third volume chamber 13 → the third bypass 37 → the first outflow path 32 are formed.
Therefore, as shown in FIG. 4, at this time, the fluid valve device VS communicates the flow path r1 and the flow path r7 by the third path fr3, and connects the flow path r6 and the flow path r2 by the fourth path fr4. To do.

As shown by the white arrow in FIG. 4, in the second mode, the coolant warmed by cooling the battery B is flow path r1 → fluid valve device VS → flow path r7 → infusion pump P2 → flow path r8. It circulates as → and flows into the motor / inverter M1. Then, the coolant that has cooled the motor / inverter M1 and is further warmed flows into the radiator R through the flow path r5, and is cooled by the radiator R. A part of the coolant cooled by the radiator R1 further flows through the flow path r6 → the fluid valve device VS → the flow path r2 and flows into the chiller C, and is further cooled by the chiller C. The coolant cooled by the chiller flows in the order of the flow path r3 → the infusion pump P1 → the flow path r4 and is returned to the battery B.

The warm coolant that has passed through the motor / inverter M2 in the second mode circulates in the order of the flow path r10 → the flow path r5, flows into the radiator R, and is cooled. Then, at the radiator R, the coolant that has passed through the motor / inverter M2 and the coolant that has passed through the motor / inverter M1 merge, and a part of the coolant goes to the chiller C through the flow path r6 and is further cooled by the chiller C. To. The other part is returned to the motor inverter M2 through the flow path r9. As described above, in the second mode, most of the coolant distributed to the vehicle cooling system is cooled by the chiller C. Further, since all the coolant flows into the radiator R, the coolant that has passed through the chiller C and the coolant that has returned to the motor inverter M2 without passing through the chiller C are mixed or heat exchanged in the radiator R. To do. Therefore, in the second mode, all the coolant is directly or indirectly cooled by the chiller C, and as a result, the motor inverter M1 and the motor inverter M2 are sufficiently cooled.

As shown in FIGS. 1 and 2, the fluid valve device of the first embodiment has a first inflow path 31, a first outflow path 32, a second inflow path 33, and a second outflow as a substantial fluid flow path. It has a road 34, a first volume chamber 11, and a second volume chamber 12, and if necessary, these flow paths are connected to the third volume chamber 13, the first bypass 35, the second bypass 36, or the third bypass. We will contact you as appropriate by 37. As a result, in the fluid valve device of the first embodiment, the total number and volumes of the flow paths can be reduced, and the dead space can be reduced, so that the size can be reduced. Further, in the fluid valve device of the first embodiment, the first valve Va to the fourth valve Vd are built in the first volume chambers 11 to the third volume chamber 13 which are a part of the fluid flow path, and these are unitized. ing. This also contributes to the miniaturization of the fluid valve device.

In the fluid valve device of the present invention, the on-off valve drive unit 7 may be separate from the valve unit 6, the main body 1 and the flow path 3, or may be unitized. However, considering the miniaturization of the fluid valve device, it is preferable to unitize them. When the main body 1, the flow path 3, the valve 6, and the on-off valve drive unit 7 are unitized, the valve 6 and the on-off valve drive unit 7 are preferably arranged inside the main body 1.

In the fluid valve device of the first embodiment, poppet type valves were used as the first valve Va to the fourth valve Vd included in the valve section 6, but the valve section 6 in the fluid valve device of the present invention is the embodiment. It is not limited to the first valve Va to the fourth valve Vd of No. 1, and may be, for example, an electromagnetic valve or the like.

The poppet valve used as the first valve Va to the fourth valve Vd in the fluid valve device of the first embodiment is a valve in which the valve body moves in the direction perpendicular to the valve seat surface. This type of valve has a simple structure and is excellent in sealing property and operation reliability. Therefore, in the fluid valve device of the first embodiment, the poppet type valve is used as the first valve Va to the fourth valve Vd, and the fluid flow path is configured as described above, so that the sealing property and the reliability of operation are reliable. It can be said that the miniaturization of the fluid valve device can be realized while ensuring the performance.

In the fluid valve device of the present invention, the positional relationship between the end of the third bypass cylinder 47 on the first outflow path 32 side and the end of the third bypass cylinder 47 on the third volume chamber 13 side is not particularly limited. , The positional relationship may be different from that of the fluid valve device of the first embodiment. For example, if a fluid pressure difference is appropriately generated between the first outflow passage 32 and the third volume chamber 13 by the infusion pumps P1, P2, etc., these positional relationships need not be particularly considered. Further, for example, a check valve may be provided inside the third bypass cylinder 47.

The present invention is not limited to the embodiment described above and shown in the drawings, and can be appropriately modified and implemented without departing from the gist. In addition, each component shown in the present specification including the embodiment can be arbitrarily extracted and combined.

1: Main body 11: 1st volume chamber 12: 2nd volume chamber 13: 3rd volume chamber 3: Flow path portion 31: 1st inflow passage 32: 1st outflow passage 33: 2nd inflow passage 34: 2nd outflow Road 35: 1st bypass 36: 2nd bypass 37: 3rd bypass 6: Valve part Va: 1st valve Vb: 2nd valve Vc: 3rd valve Vd: 4th valve 61: Valve body 63: Valve seat 62: Bounce element 7: On-off valve drive unit Ia, Ib, Ic, Id: Pressing unit VS: Fluid valve device

Claims (2)

A main body having a first volume chamber, a second volume chamber, and a third volume chamber and serving as a fluid flow path,
A first inflow passage connecting to the first volume chamber, a first outflow passage connecting to the first volume chamber, a second inflow passage connecting to the second volume chamber, and a second outflow connecting to the second volume chamber. A road, a first bypass connecting the first volume chamber and the second volume chamber, a second bypass connecting the second inflow passage and the third volume chamber, and the third volume chamber and the first volume chamber. 1 A flow path portion having a third bypass connecting the outflow path and
A first valve that opens and closes between the first volume chamber and the first outflow passage, a second valve that opens and closes between the second inflow passage and the second volume chamber, the first volume chamber and the first volume chamber. A valve portion having a third valve that opens and closes between the two volume chambers and a fourth valve that opens and closes between the third volume chamber and the second bypass.
The first valve, the second valve, the third valve, and the on-off valve drive unit for driving the fourth valve are provided.
The on-off valve drive unit opens the first valve, opens the second valve, closes the third valve, and closes the fourth valve.
A fluid valve device for switching between a second mode in which the first valve is closed, the second valve is closed, the third valve is opened, and the fourth valve is opened. The first valve, the second valve, the third valve, and the fourth valve respectively urge the valve body, the valve seat on which the valve body is seated, and the valve body toward the valve seat. With an urging element,
The on-off valve drive unit has a pressing unit that presses the valve body in a direction away from the valve seat.
The pressing portion presses the valve body of the first valve and the valve body of the second valve in the first mode, and the valve body of the third valve and the valve body of the fourth valve in the second mode. The fluid valve device according to claim 1, which presses.

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