WO2017217112A1 - Switchable flow control valve - Google Patents

Abstract

A valve chamber (301a), and opening/closing flow holes (301b, 301c, 305a, 306a) and open flow holes (301d, 307a) which open into the valve chamber and through which a fluid flows are formed in a valve body (30) of a switchable flow control valve. A primary valve (32) opens and closes the opening/closing flow holes by rotating about a single axial center. A secondary valve (34) is disposed opposite to the opening/closing flow holes, with the primary valve interposed therebetween, and rotates about the single axial center. Seals (401, 421) are compressed between the valve body and the primary valve, and seal the peripheries of the open ends of the opening/closing flow holes in the valve chamber. As the primary valve rotates, the primary valve causes a first end (321b) of a primary valve through-hole (321a) formed in the primary valve to face the open ends of the opening/closing flow holes so as to open the opening/closing flow holes. The secondary valve at least partially covers the other end (321c) of the primary valve through-hole as the secondary valve rotates, and increases or decreases the area covering the other end of the primary valve through-hole by rotating about the single axial center.

Description

Switching flow control Cross-reference to related applications

This application is based on Japanese Patent Application No. 2016-118527 filed on June 15, 2016, the description of which is incorporated herein by reference.

The present disclosure relates to a switching flow control valve that switches, opens and closes a flow path through which a fluid flows and adjusts the flow rate of the fluid.

Patent Document 1 describes a flow path switching valve. The flow path switching valve of Patent Document 1 includes a rotary valve mechanism that selectively connects two outflow ports to the inflow port. The flow path switching valve of Patent Document 1 includes a valve main body, a seal member, a valve body, and a drive device including a motor and the like. A valve chamber, an inlet, and two outlets are formed in the valve body, and the inlet and the two outlets open to the valve chamber, respectively.

The seal member is made of an elastic material and is disposed in the valve chamber. The seal member has a cylindrical body in which a plurality of through holes are formed in the circumferential direction, an outer rib, and an inner rib. The outer rib of the seal member protrudes outward from the outer peripheral surface of the cylindrical body along the periphery of the through hole of the cylindrical body, and the inner rib extends from the inner peripheral surface of the cylindrical body along the periphery of the through hole. Projected toward

The valve body has a valve shaft coupled to the driving device and a valve body portion accommodated inside the seal member in the valve chamber. Further, the inner rib of the seal member contacts the outer peripheral surface of the valve body, and the outer rib of the seal member contacts the inner peripheral surface forming the valve chamber of the valve body. Further, the inner rib and the outer rib of the seal member serve as a seal portion that seals around the outflow port in the valve chamber. Therefore, the seal portion is constantly compressed and elastically deformed between the inner peripheral surface of the valve body and the outer peripheral surface of the valve body portion. The seal portion is provided for each of the two outlets.

And the flow-path switching valve of patent document 1 opens the two outflow ports of a valve main body alternatively with respect to a valve chamber by rotating a valve body part via a valve shaft with a drive device. At this time, the valve body portion rotates and slides with respect to the inner rib of the seal member as the valve body portion rotates.

Japanese Patent Laid-Open No. 2015-34560

The flow path switching valve of the above-mentioned patent document 1 has two outlets that are selectively opened with respect to the valve chamber, but the fluid flowing out from the inlet to the one outlet through the valve chamber It can also function as a switching flow control valve that adjusts the flow rate. Specifically, in the flow path switching valve of Patent Document 1, the flow rate of the fluid flowing out to the one outlet is adjusted by partially overlapping the communication hole on the side of the valve body part with the one outlet. be able to.

When the flow rate adjustment is performed in this way, in the flow path switching valve of Patent Document 1, in detail, the area of the communication hole of the valve body portion that overlaps the through hole of the seal portion arranged with respect to the one outlet port. Determines the flow rate of the fluid.

Therefore, when adjusting the flow rate so that the communication hole of the valve body part and the through hole of the seal part partially overlap, the valve body part has the periphery of the communication hole of the valve body part intersecting the inner rib of the seal part. The seal part is pressed in a state where the seal part intersects. Furthermore, when the flow rate of the fluid flowing out from the inflow port to the one outflow port is maintained, the seal portion continues to be pressed against the valve body portion while being in the crossed state of the seal portion.

As a result, a partial step may remain on the seal surface on the valve body side of the seal portion (that is, the seal surface configured by the inner rib). And the level | step difference of such a seal surface becomes a cause which worsens the sealing performance of a seal part. As a result of detailed studies by the inventor, the above has been found.

In view of the above, it is an object of the present disclosure to provide a switching flow control valve capable of adjusting the flow rate of a fluid so as not to deteriorate the sealing performance of the seal portion.

In order to achieve the above object, a switching flow regulating valve according to one aspect of the present disclosure is:
A switching flow control valve that switches or opens and closes the flow path of the fluid and adjusts the flow rate of the fluid,
A valve body having a valve chamber and an open / close flow hole and an open flow hole that are open to the valve chamber and through which fluid flows; and
A main valve which is housed in the valve chamber and which opens and closes the opening and closing flow hole by rotating around a uniaxial center;
A secondary valve housed in the valve chamber, disposed on the opposite side of the main valve with respect to the open / close flow hole, and rotated about a single axis;
A seal that is elastic and is sandwiched between the valve body and the main valve so as to surround the open end of the open / close flow hole on the valve chamber side, and seals around the open end of the open / close flow hole in the valve chamber With
A main valve through hole is formed in the main valve,
The main valve opens the open / close flow hole by causing the one end of the main valve through hole to face the open end of the open / close flow hole as the main valve rotates.
The sub valve covers at least a part of the other end of the main valve through-hole with the rotation of the sub-valve, and increases or decreases by rotating an area covering the other end of the main valve through-hole around the uniaxial center.

According to this, the sub-valve that is not in direct contact with the seal portion increases or decreases by rotating the area covering the other end of the main valve through-hole around the uniaxial center, thereby switching the flow control valve Can adjust the flow rate of the fluid. Therefore, it is not necessary to adjust the flow rate of the main valve, and it is sufficient to open and close the open / close flow hole. That is, when the flow rate of the fluid is adjusted, it is not necessary to continue the state in which the peripheral edge of one end of the main valve through hole intersects the seal portion. Can be kept good. In short, it is possible to adjust the flow rate of the fluid so as not to deteriorate the sealing performance of the seal portion.

It is the block diagram which showed schematic structure of the integrated heat management system in 1st Embodiment. It is the figure which showed typically the structure of the inlet side three-way valve of 1st Embodiment, Comprising: It is sectional drawing cut | disconnected by the plane containing the valve shaft center of an inlet side three-way valve. FIG. 3 is a cross-sectional view showing a III-III cross section of FIG. It is the typical perspective view which showed the main valve which the inlet side three-way valve of 1st Embodiment has alone. It is the typical perspective view which extracted and showed the subvalve and drive shaft which the inlet side three-way valve of 1st Embodiment has. In 1st Embodiment, it is the expanded view which expand | deployed the outer peripheral surface of the subvalve surrounding wall part by making the valve circumferential direction into the paper surface horizontal direction. In 1st Embodiment, it is the expanded view which expand | deployed the outer peripheral surface of the main valve surrounding wall part by making the valve circumferential direction into the paper surface horizontal direction. FIG. 4 is a view showing a structure of a rotation connecting / disconnecting portion in the first embodiment, that is, a cross-sectional view showing a VIII-VIII cross section of FIG. 2. It is IX arrow line view in FIG. It is the figure which showed typically the structure of the three-way valve of a comparative example, Comprising: It is a figure corresponded in FIG. 2 of 1st Embodiment. It is the typical perspective view which extracted and represented the main valve and drive shaft which the three-way valve of a comparative example has, and is a figure equivalent to Drawing 4 of a 1st embodiment. It is the typical perspective view showing the 1st seal member and the 2nd seal member which the three-way valve of a comparative example has alone. In the three-way valve of the comparative example, it is a diagram in which the first seal member or the second seal member is overlapped and displayed on a developed view in which the outer peripheral surface of the main valve peripheral wall portion is developed with the valve circumferential direction being the horizontal direction of the drawing. It is a figure equivalent to FIG. 7 of a form. FIG. 11 is a cross-sectional view showing the XIV-XIV cross section of FIG. 10 and showing a certain rotational position of the main valve during flow rate adjustment in which the flow rate of hot water passing through a second radial hole is adjusted. FIG. 15 is a cross-sectional view illustrating the XV-XV cross section of FIG. 14 while extracting and illustrating the second seal member, the main valve, and the drive shaft of the three-way valve of the comparative example. FIG. 11 is a cross-sectional view showing the XIV-XIV cross section of FIG. 10 and showing a certain rotational position of the main valve during flow rate adjustment in which the flow rate of cold water passing through the first radial hole is adjusted. FIG. 17 is a cross-sectional view illustrating the XVII-XVII cross section of FIG. 16 while extracting and illustrating the second seal member, the main valve, and the drive shaft of the three-way valve of the comparative example. It is the perspective view which showed typically the structure of the inlet side three-way valve of 2nd Embodiment. It is sectional drawing which showed typically the structure of the inlet side three-way valve of 3rd Embodiment, Comprising: It is a figure corresponded in FIG. 2 of 1st Embodiment. It is sectional drawing which showed typically the structure of the inlet side three-way valve in the modification of 1st Embodiment, Comprising: It is a figure corresponded in FIG. 2 of 1st Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
FIG. 1 is a block diagram showing a schematic configuration of an integrated heat management system 10 in the present embodiment. The integrated heat management system 10 shown in FIG. 1 is a system mounted on a vehicle such as a hybrid vehicle. The integrated heat management system 10 generates cold water and hot water by the refrigeration cycle device 12, and cools or adjusts the temperature by supplying the cold water or hot water to a plurality of devices 11a, 11b, and 11c including a heat exchanger for air conditioning. I do.

Specifically, in the integrated heat management system 10, cold water as the first heat exchange medium and hot water as the second heat exchange medium having a temperature higher than that of the cold water circulate. Then, the integrated heat management system 10 selectively supplies the cold water and hot water to the first device 11a. The integrated heat management system 10 supplies cold water to the cooler core 11b as the second device 11b, and supplies hot water to the heater core 11c as the third device 11c. The first device 11a is, for example, a battery.

1 indicates the direction in which cold water flows, arrow FL2 indicates the direction in which hot water flows, and arrow FL3 indicates the direction in which the refrigerant in the refrigeration cycle apparatus 12 flows. In the present embodiment, the first heat exchange medium and the second heat exchange medium are both an aqueous solution, ie, a liquid, in which an antifreeze liquid is mixed, but may be a gas.

As shown in FIG. 1, the integrated heat management system 10 includes a refrigeration cycle apparatus 12, a cold water pump 13, a hot water pump 14, a cold water supply passage 161, a cold water recovery passage 162, a cold water bypass passage 163, an on-off valve 163a, and hot water supply. A passage 171, a hot water recovery passage 172, a hot water bypass passage 173, an inlet side three-way valve 18, an outlet side three-way valve 19, an inlet pipe 20, and an outlet pipe 21 are provided as main components.

The refrigeration cycle apparatus 12 cools the cold water circulating in the integrated heat management system 10 and heats the hot water circulating in the integrated heat management system 10. In short, the refrigeration cycle apparatus 12 serves as a heat pump that transfers heat from the cold water to the hot water.

The refrigeration cycle apparatus 12 includes a vapor compression refrigeration cycle, and includes a compressor 121, a water-cooled condenser 122, an expansion valve 123, and a chiller 124. These components 121, 122, 123, and 124 are connected in an annular shape by piping, and the piping constitutes a refrigerant circulation path through which the refrigerant circulates as shown by an arrow FL3.

The compressor 121 sucks the refrigerant from the chiller 124, compresses the sucked refrigerant, and then discharges it to the water-cooled condenser 122. The water-cooled condenser 122 is a heat exchanger that exchanges heat between the refrigerant and the hot water. The water-cooled condenser 122 dissipates heat from the refrigerant to the hot water, thereby condensing the refrigerant and heating the hot water.

The refrigerant flows from the water-cooled condenser 122 into the expansion valve 123. The expansion valve 123 decompresses and expands the refrigerant that has flowed from the water-cooled condenser 122, and causes the refrigerant after the decompression and expansion to flow out to the chiller 124. The chiller 124 is a heat exchanger that exchanges heat between the refrigerant and the cold water. The refrigerant flows into the chiller 124 from the expansion valve 123. The chiller 124 absorbs heat from the cold water to the refrigerant, thereby evaporating the refrigerant and cooling the cold water.

The cold water pump 13 has a cold water suction port 13a and a cold water discharge port 13b, and discharges cold water sucked from the cold water suction port 13a from the cold water discharge port 13b. The cold water discharged from the cold water discharge port 13 b flows into the cold water supply passage 161 after being cooled by the chiller 124.

Further, a cold water recovery passage 162 is connected to the cold water inlet 13a of the cold water pump 13. The cold water recovery passageway 162 guides the cold water after heat exchange by the first device 11 a to the cold water inlet 13 a of the cold water pump 13.

The cold water bypass passage 163 is connected between the cold water supply passage 161 and the cold water inlet 13 a of the cold water pump 13. That is, the upstream end of the cold water bypass passage 163 is connected to the cold water supply passage 161, and the downstream end of the cold water bypass passage 163 is connected to the cold water inlet 13 a of the cold water pump 13.

In the cold water bypass passage 163, a cooler core 11b and an electric on-off valve 163a for opening and closing the cold water bypass passage 163 are provided in series. The cooler core 11b is provided in an air conditioning unit (not shown) that air-conditions the passenger compartment. And the cooler core 11b heat-exchanges the cold water which distribute | circulates the inside of the cooler core 11b, and the air which passes the cooler core 11b within an air conditioning unit, and cools the air by the heat exchange.

The hot water pump 14 has a hot water inlet 14a and a hot water outlet 14b, and discharges hot water drawn from the hot water inlet 14a from the hot water outlet 14b. The hot water discharged from the hot water discharge port 14 b flows into the hot water supply passage 171 after being heated by the water cooling condenser 122.

A heater core 11c is provided in the middle of the hot water supply passage 171. The heater core 11c is provided in the air conditioning unit. And the heater core 11c heat-exchanges the hot water which distribute | circulates the inside of the heater core 11c, and the air which passes the heater core 11c within an air conditioning unit, and heats the air by the heat exchange.

Further, a hot water recovery passage 172 is connected to the hot water inlet 14a of the hot water pump 14. The warm water recovery passage 172 guides the warm water after heat exchange by the first device 11 a to the warm water inlet 14 a of the warm water pump 14.

The hot water bypass passage 173 is connected between the hot water outlet of the heater core 11 c and the hot water inlet 14 a of the hot water pump 14. That is, the upstream end of the hot water bypass passage 173 is connected to the hot water outlet of the heater core 11 c, and the downstream end of the hot water bypass passage 173 is connected to the hot water inlet 14 a of the hot water pump 14. In the present embodiment, the device to be heated is not provided in the hot water bypass passage 173, but the device to be heated may be provided in the hot water bypass passage 173 and heated by the hot water.

The inlet side three-way valve 18 selectively connects the cold water supply passage 161 and the hot water supply passage 171 to the inlet pipe 20 connected to the inlet side of the first device 11a, and the inlet pipe of the cold water and the hot water. The flow rate of the fluid flowing to 20 is adjusted. In short, the inlet side three-way valve 18 is a switching flow regulating valve that switches the flow path through which the fluid flows on the inlet side of the first device 11a and adjusts the flow rate of the fluid.

For example, the cold water flowing from the cold water supply passage 161 to the inlet side three-way valve 18 is about −20 ° C., and the hot water flowing from the hot water supply passage 171 to the inlet side three way valve 18 is about 60 ° C.

Further, the outlet side three-way valve 19 is a flow path switching valve that selectively connects the outlet pipe 21 connected to the outlet side of the first device 11a to the cold water recovery path 162 and the hot water recovery path 172. In the present embodiment, unlike the inlet-side three-way valve 18, the outlet-side three-way valve 19 does not have a flow rate adjusting function for adjusting the flow rate of fluid. This is because if one of the inlet side three-way valve 18 and the outlet side three-way valve 19 has a flow rate adjusting function, the flow rate of cold water and the flow rate of hot water flowing to the first device 11a can be adjusted. The outlet side three-way valve 19 of the present embodiment is a known three-way valve.

The cold water or hot water that has flowed into the first device 11a from the inlet pipe 20 exchanges heat inside the first device 11a and then flows out to the outlet pipe 21. That is, if cold water flows into the first device 11a, the first device 11a is cooled by the cold water, and if warm water flows into the first device 11a, the first device 11a is heated by the hot water.

The inlet-side three-way valve 18 and the outlet-side three-way valve 19 are operated in conjunction with each other. Specifically, when the inlet-side three-way valve 18 communicates the cold water supply passage 161 with the first inlet pipe 20, the outlet-side three-way valve 19 connects the outlet pipe 21 to the cold water pump 13 via the cold water recovery passage 162. It communicates with the cold water inlet 13a. At that time, the port of the inlet-side three-way valve 18 connected to the hot water supply passage 171 is closed by the inlet-side three-way valve 18, and the port of the outlet-side three-way valve 19 connected to the hot water recovery passage 172 is closed by the outlet-side three-way valve 19. Blocked.

Conversely, when the inlet-side three-way valve 18 communicates the hot water supply passage 171 with the inlet pipe 20, the outlet-side three-way valve 19 connects the outlet pipe 21 via the hot water recovery passage 172 to the hot water inlet of the hot water pump 14. Communicate to 14a. At that time, the port of the inlet-side three-way valve 18 connected to the cold water supply passage 161 is closed by the inlet-side three-way valve 18, and the port of the outlet-side three-way valve 19 connected to the cold water recovery passage 162 is closed by the outlet-side three-way valve 19. Blocked.

Further, the inlet side three-way valve 18 adjusts the flow rate of the fluid flowing into the inlet pipe 20 out of the cold water and the hot water regardless of which of the cold water supply path 161 and the hot water supply path 171 communicates with the inlet pipe 20. can do.

From the above configuration, for example, by controlling the three- way valves 18 and 19 as described above in a state where the refrigeration cycle apparatus 12 and the pumps 13 and 14 are operated, the cold water and the hot water are selected. In particular, it can be supplied to the first device 11a. In the integrated heat management system 10 of the present embodiment, the cold water discharged from the cold water pump 13 and the hot water discharged from the hot water pump 14 merge with each other by the control of the three- way valves 18 and 19 as described above. It will circulate through a separate heat carrier circuit.

In addition, in the integrated heat management system 10, in addition to the control of the three- way valves 18 and 19, the on-off control of the on-off valve 163a, the operation control of the refrigeration cycle apparatus 12, and the operation control of the pumps 13 and 14 are performed. Thereby, the integrated thermal management system 10 is switched to various operating situations. Further, the integrated heat management system 10 distributes the hot water flowing out from the heater core 11c as indicated by an arrow FL4, and can supply the hot water to the engine for traveling.

Next, the structure of the inlet side three-way valve 18 of this embodiment will be described. As shown in FIGS. 2 and 3, the inlet side three-way valve 18 is a rotary switching flow control valve. The inlet side three-way valve 18 includes a valve main body 30, a main valve 32, a sub valve 34, a drive shaft 36, a first seal member 40, a second seal member 42, and a drive device 44.

The drive device 44 is connected to the auxiliary valve 34 via the drive shaft 36. That is, the auxiliary valve 34 is a drive valve that is driven by the drive device 44 among the plurality of rotary valves 32, 34 included in the inlet side three-way valve 18.

The drive device 44 is a drive source that rotates the sub-valve 34 according to electrical control of an electronic control device (not shown), and is disposed on one side of the valve body 30 in the axial direction DRa of the valve axis CLv. The drive device 44 includes, for example, a speed reduction mechanism such as a gear train and an electric motor.

FIG. 2 is a cross-sectional view showing the II-II cross section of FIG. In FIG. 2, the drive device 44 is not shown in cross section except for a part thereof. Further, FIG. 2 is shown with a space between each component of the inlet side three-way valve 18 in order to easily understand the structure of the inlet side three-way valve 18. For example, the seal members 40 and 42 are actually in close contact with the main valve 32 and the valve body 30 in the radial direction DRr of the valve axis CLv, but FIG. Is shown. Such a schematic drawing method is the same in other drawings.

In the following description, the axial direction DRa of the valve axis CLv is referred to as the valve axis direction DRa, the radial direction DRr of the valve axis CLv is referred to as the valve diameter direction DRr, and the circumferential direction DRc of the valve axis CLv is the valve circumference. It shall be called direction DRc. Further, the valve axis CLv is a uniaxial center that becomes the rotation center of the main valve 32 and the sub valve 34.

The valve body 30 is a non-rotating portion that does not rotate, and serves as a housing for the inlet-side three-way valve 18. The valve body 30 includes a valve chamber forming part 301, a first radial pipe part 305, a second radial pipe part 306, and an axial pipe part 307. The valve chamber forming portion 301, the first radial piping portion 305, the second radial piping portion 306, and the axial piping portion 307 are integrally configured so that hot water and cold water do not leak from the connection portions. ing.

A valve chamber 301 a is formed inside the valve chamber forming portion 301. Specifically, the valve chamber forming portion 301 has a valve chamber peripheral wall portion 302, one end portion 303, and the other end portion 304. The valve chamber peripheral wall 302 has a cylindrical shape centered on the valve axis CLv. That is, the valve chamber peripheral wall 302 is formed so as to surround the valve chamber 301a around the valve axis CLv over the entire circumference.

One end portion 303 of the valve chamber forming portion 301 is joined to one end of the valve chamber peripheral wall portion 302 on one side in the valve axial direction DRa with respect to the valve chamber peripheral wall portion 302. And the one end part 303 of the valve chamber formation part 301 comprises the plate shape which made the valve-axis direction DRa the thickness direction, for example, and has covered one side of the valve-chamber 301a in the valve-axis direction DRa.

Further, the drive device 44 is disposed on the opposite side to the valve chamber 301a side with respect to the one end portion 303 of the valve chamber forming portion 301 in the valve axial direction DRa. Therefore, a shaft insertion hole 303a through which the drive shaft 36 is inserted through the one end portion 303 in the valve shaft direction DRa is formed in the one end portion 303 of the valve chamber forming portion 301. In order to prevent fluid from leaking from the valve chamber 301a, an O-ring 361 that seals a radial clearance around the drive shaft 36 in the shaft insertion hole 303a is provided.

The other end 304 of the valve chamber forming portion 301 is joined to the other end of the valve chamber peripheral wall 302 on the other side in the valve axial direction DRa with respect to the valve chamber peripheral wall 302. The other end 304 of the valve chamber forming portion 301 has, for example, a plate shape with the valve axis direction DRa as the thickness direction, and covers the other side of the valve chamber 301a in the valve axis direction DRa.

As shown in FIGS. 2 and 3, the first radial pipe portion 305 protrudes outward from the valve chamber peripheral wall portion 302 in the valve radial direction DRr, and has a cylindrical shape, for example. That is, a first radial hole 305 a is formed inside the first radial pipe portion 305. The first radial hole 305a is, for example, a circular hole.

And the 1st radial direction hole 305a penetrates the 1st radial direction piping part 305 and the valve chamber surrounding wall part 302, and is opened with respect to the valve chamber 301a. Accordingly, the first radial hole 305 a has an open end 305 b on the valve chamber 301 a side of the first radial hole 305 a, and the open end 305 b is formed in the valve chamber peripheral wall 302.

The first radial hole 305a is connected to the cold water supply passage 161 (see FIG. 1) and functions as a first inlet port through which cold water flows from the cold water supply passage 161. The first radial hole 305 a is a first opening / closing circulation hole through which fluid (specifically, cold water) from the cold water supply passage 161 flows and is opened and closed by the rotation of the main valve 32.

The second radial pipe portion 306 protrudes outward from the valve chamber peripheral wall portion 302 in the valve radial direction DRr. Moreover, the 2nd radial direction piping part 306 has comprised the cylindrical shape, for example. That is, a second radial hole 306 a is formed inside the second radial pipe portion 306. The second radial hole 306a is, for example, a circular hole.

The second radial hole 306a penetrates the second radial pipe portion 306 and the valve chamber peripheral wall portion 302 and opens to the valve chamber 301a. Therefore, the second radial hole 306 a has an open end 306 b on the valve chamber 301 a side of the second radial hole 306 a, and the open end 306 b is formed in the valve chamber peripheral wall 302.

Further, the second radial pipe portion 306 protrudes to the opposite side of the first radial pipe portion 305 with the valve shaft center CLv interposed therebetween. Therefore, the second radial hole 306a is provided on the opposite side to the first radial hole 305a with the valve shaft center CLv interposed therebetween. Furthermore, the opening end 306b of the second radial hole 306a is disposed so as to face the opening end 305b of the first radial hole 305a with the valve axis CLv interposed therebetween.

The second radial hole 306a is connected to the hot water supply passage 171 (see FIG. 1), and functions as a second inlet port through which the hot water flows from the hot water supply passage 171. The second radial hole 306 a is a second opening / closing circulation hole through which fluid (specifically, hot water) from the hot water supply passage 171 flows and is opened and closed by the rotation of the main valve 32.

The axial piping part 307 protrudes from the other end part 304 of the valve chamber forming part 301 to the other side in the valve axial direction DRa, and has, for example, a cylindrical shape. That is, an axial hole 307 a is formed inside the axial pipe portion 307. The axial hole 307a is, for example, a circular hole.

The axial hole 307a passes through the axial pipe portion 307 and the other end portion 304 of the valve chamber forming portion 301 and opens to the valve chamber 301a. Accordingly, the axial hole 307 a has an open end 307 b on the valve chamber 301 a side of the axial hole 307 a, and the open end 307 b is formed at the other end 304 of the valve chamber forming portion 301.

Further, the axial hole 307a is connected to the inlet pipe 20 (see FIG. 1), and functions as an outlet port through which the fluid in the valve chamber 301a flows out to the inlet pipe 20. The axial hole 307a is an opening circulation hole through which fluid (specifically, cold water or hot water) flowing out from the valve chamber 301a to the inlet pipe 20 flows.

2 to 4, the main valve 32 of the inlet side three-way valve 18 is a rotating valve body that rotates about the valve axis CLv, and is accommodated in the valve chamber 301a. The main valve 32 has, for example, a bottomed cylindrical shape in which one side in the valve axial direction DRa is closed. The main valve 32 has a main valve peripheral wall portion 321 and one end portion 322. The main valve peripheral wall portion 321 and the one end portion 322 are integrally formed.

The main valve peripheral wall 321 has a cylindrical shape centered on the valve axis CLv. A sub valve 34 is arranged inside the main valve peripheral wall 321. Therefore, the main valve peripheral wall portion 321 is configured to surround the auxiliary valve 34 around the valve axis CLv over the entire periphery thereof.

The main valve 32 has a main valve through hole 321a. The main valve through hole 321a is, for example, a circular hole. Specifically, the main valve through-hole 321a is formed so as to penetrate the main valve peripheral wall portion 321 of the main valve 32 in the valve radial direction DRr. The main valve through hole 321a has one end 321b outside the valve radial direction DRr and the other end 321c inside the valve radial direction DRr of the main valve through hole 321a.

One end 322 of the main valve 32 is joined to one end of the main valve peripheral wall 321 on one side in the valve axial direction DRa with respect to the main valve peripheral wall 321. And the one end part 322 of the main valve 32 comprises the plate shape which made the valve-axis direction DRa the thickness direction, for example, and has covered one side of the inner space of the main-valve surrounding wall part 321 in the valve-axis direction DRa.

Further, a shaft insertion hole 322a through which the drive shaft 36 is inserted through the one end 322 in the valve shaft direction DRa is formed in the one end 322 of the main valve 32. The drive shaft 36 is connected to the sub valve 34 so as to transmit power to the drive device 44 in a state of being inserted into the shaft insertion hole 322a of the main valve 32 and the shaft insertion hole 303a of the valve chamber forming portion 301. .

The main valve 32 opens and closes the first radial hole 305a and the second radial hole 306a of the valve body 30 by rotating around the valve axis CLv in the valve chamber 301a. Specifically, the main valve 32 selectively closes the first radial hole 305a and the second radial hole 306a by rotating around the valve axis CLv.

Specifically, the main valve 32 is positioned at least in the first rotation position and the second rotation position by being rotated around the valve axis CLv. The first rotation position is a rotation position at which the main valve 32 opens the first radial hole 305a and closes the second radial hole 306a. The second rotational position is a rotational position where the main valve 32 closes the first radial hole 305a and opens the second radial hole 306a. In the present embodiment, the second rotational position is a rotational position in which the main valve 32 is inverted about the valve axis CLv with respect to the first rotational position. 2, FIG. 3, and FIG. 8 described later are all shown in a state where the main valve 32 is positioned at the first rotational position.

For example, when the main valve 32 is positioned at the first rotation position as the main valve 32 rotates, the one end 321b of the main valve through-hole 321a is opposed to the opening end 305b of the first radial hole 305a. Let Accordingly, the main valve 32 opens the first radial hole 305a to the valve chamber 301a. At the same time, the main valve 32 closes the open end 306b of the second radial hole 306a with the outer peripheral surface 321d of the main valve peripheral wall 321.

When the main valve 32 is positioned at the first rotational position as described above, that is, in the first case where the first radial hole 305a is opened and the second radial hole 306a is closed, the first diameter Cold water flows through the valve chamber 301a between the directional hole 305a and the axial hole 307a.

Conversely, when the main valve 32 is positioned at the second rotational position as the main valve 32 rotates, the one end 321b of the main valve through-hole 321a is relative to the opening end 306b of the second radial hole 306a. Turn. Accordingly, the main valve 32 opens the second radial hole 306a to the valve chamber 301a. At the same time, the main valve 32 closes the open end 305b of the first radial hole 305a with the outer peripheral surface 321d of the main valve peripheral wall 321.

When the main valve 32 is positioned at the second rotational position as described above, that is, in the second case where the first radial hole 305a is closed and the second radial hole 306a is opened, the second diameter Hot water flows through the valve chamber 301a between the directional hole 306a and the axial hole 307a. That is, in the second case, a fluid having a higher temperature than the first case flows between the second radial hole 306a and the axial hole 307a through the valve chamber 301a.

As shown in FIGS. 2, 3, and 5, the auxiliary valve 34 of the inlet side three-way valve 18 is a rotating valve body that rotates about the valve axis CLv, and is accommodated in the valve chamber 301a. In the valve chamber 301a, the sub valve 34 is disposed on the opposite side of the main valve 32 with respect to the first radial hole 305a in the valve radial direction DRr. Further, the sub valve 34 is arranged on the opposite side of the main valve 32 in the valve radial direction DRr with respect to the second radial hole 306a.

Specifically, since the auxiliary valve 34 is disposed inside the main valve peripheral wall 321, the main valve 32 is provided for each of the first radial hole 305 a and the second radial hole 306 a in the valve radial direction DRr. The main valve peripheral wall portion 321 is disposed on the opposite side. Further, the sub valve 34 is integrated with the drive shaft 36, and the sub valve 34 and the drive shaft 36 constitute a sub valve combined body 38 as a whole.

The secondary valve 34 has, for example, a bottomed cylindrical shape in which one side in the valve axial direction DRa is closed. The auxiliary valve 34 has an auxiliary valve peripheral wall 341 and one end 342. The auxiliary valve peripheral wall portion 341 and the one end portion 342 are integrally formed.

The auxiliary valve peripheral wall part 341 has a cylindrical shape centered on the valve axis CLv. The auxiliary valve peripheral wall 341 is formed along the main valve peripheral wall 321 on the inner peripheral side of the main valve peripheral wall 321. Accordingly, when the auxiliary valve 34 rotates relative to the main valve 32 around the valve axis CLv, the auxiliary valve peripheral wall part 341 rotates around the valve axis CLv along the main valve peripheral wall part 321.

Further, the open end 307b of the axial hole 307a formed in the valve body 30 is disposed on the inner side in the valve radial direction DRr than the auxiliary valve peripheral wall portion 341.

The sub-valve 34 has a sub-valve through hole 341a. Specifically, the auxiliary valve through hole 341a is formed through the auxiliary valve peripheral wall portion 341 of the auxiliary valve 34 in the valve radial direction DRr. The sub-valve through hole 341a has one end 341b outside the sub-valve through hole 341a in the valve radial direction DRr and the other end 341c inside the valve radial direction DRr.

The sub-valve through hole 341a may be a circular hole, but in this embodiment, has a hole shape that expands in the valve circumferential direction DRc. Specifically, the sub valve through hole 341a has a portion where the hole width Wh in the valve axial direction DRa becomes narrower toward one side in the valve circumferential direction DRc on the one side in the valve circumferential direction DRc in the sub valve through hole 341a. Have. At the same time, the auxiliary valve through hole 341a has a portion on the other side of the valve circumferential direction DRc in the auxiliary valve through hole 341a where the hole width Wh in the valve axial direction DRa becomes narrower toward the other side in the valve circumferential direction DRc. ing.

For example, the sub-valve through hole 341a has a composite shape in which a plurality of holes 341d, 341e, 341f are connected to each other. That is, the sub-valve through-hole 341a is composed of a central hole 341d, one side hole 341e, and the other side hole 341f. The central hole portion 341d has a circular hole shape. Further, the one side hole 341e is formed so as to expand from the center hole 341d to one side in the valve circumferential direction DRc. The hole width Wh in the valve shaft direction DRa of the one side hole 341e is narrower toward one side in the valve circumferential direction DRc. The other side hole 341f is formed so as to extend from the central hole 341d to the other side in the valve circumferential direction DRc. The hole width Wh in the valve axial direction DRa of the other side hole 341f is narrower toward the other side in the valve circumferential direction DRc.

In such a configuration of the auxiliary valve through hole 341a, one half of the valve circumferential direction DRc and one side hole 341e of the central hole 341d are the hole width of the auxiliary valve through hole 341a in the valve axial direction DRa. This corresponds to a portion where Wh becomes narrower toward one side in the valve circumferential direction DRc. Further, the other half of the valve circumferential direction DRc and the other hole 341f in the central hole portion 341d have a hole width Wh in the valve axial direction DRa of the auxiliary valve through-hole 341a that is closer to the other side in the valve circumferential direction DRc. Corresponds to a narrowed part.

Since the sub-valve through hole 341a is formed, as shown in FIG. 6, the sub-valve 34 moves at least part of the other end 321c of the main valve through-hole 321a as the sub-valve 34 rotates. Cover with the auxiliary valve peripheral wall 341. FIG. 6 is a development view in which the outer peripheral surface 341g of the sub-valve peripheral wall portion 341 is developed with the valve circumferential direction DRc as the horizontal direction on the paper surface. In FIG. 6, the other end 321c of the main valve through hole 321a is indicated by a two-dot chain line.

Specifically, as shown in FIGS. 3 and 6, the auxiliary valve 34 increases or decreases the area covering the other end 321 c of the main valve through-hole 321 a by rotating around the valve axis CLv. For example, the auxiliary valve 34 increases the area Ah of the auxiliary valve through-hole 341a overlapping the other end 321c of the main valve through-hole 321a with the rotation of the auxiliary valve 34, so that the auxiliary valve peripheral wall portion 341 is connected to the main valve through-hole 321a. The area covering the other end 321c is reduced. In FIG. 6, the area Ah of the sub-valve through hole 341a that overlaps the other end 321c of the main valve through hole 321a is expressed as the area of the hatched portion.

2 and 5, the one end 342 of the sub valve 34 is joined to one end of the sub valve peripheral wall 341 on one side in the valve axial direction DRa with respect to the sub valve peripheral wall 341. The one end portion 342 of the auxiliary valve 34 has a plate shape whose thickness direction is, for example, the valve shaft direction DRa, and the inner space on one side of the valve shaft direction DRa with respect to the inner space of the auxiliary valve peripheral wall portion 341. Covering. The drive shaft 36 is connected to the one end 342 of the auxiliary valve 34.

The first seal member 40 and the second seal member 42 are made of an elastic body such as rubber, for example. That is, the first seal member 40 and the second seal member 42 have elasticity. The first seal member 40 and the second seal member 42 are provided so as not to rotate with respect to the valve body 30. That is, the first seal member 40 and the second seal member 42 are also non-rotating parts, like the valve body 30.

2 and 3, the first seal member 40 is disposed inside the valve chamber peripheral wall portion 302 at a location where the opening end 305b of the first radial hole 305a is provided. Further, the second seal member 42 is disposed inside the valve chamber peripheral wall portion 302 at a location where the open end 306b of the second radial hole 306a is provided.

Specifically, the first seal member 40 is formed with a first seal hole 40a penetrating the first seal member 40 in the valve diameter direction DRr. The first seal member 40 is arranged such that the center of the first seal hole 40a is aligned with the center of the opening end 305b of the first radial hole 305a. Further, the hole diameter of the first seal hole 40a is slightly larger than the hole diameter of the opening end 305b of the first radial hole 305a.

For example, when the main valve 32 is positioned at the first rotation position, the first radial hole 305a of the valve body 30 is formed by sequentially connecting the first seal hole 40a, the main valve through hole 321a, and the sub valve through hole 341a. The valve body 30 communicates with the axial hole 307a.

The first seal member 40 has a first seal portion 401 formed by surrounding the first seal hole 40a in an annular shape. In other words, the first seal portion 401 has a first seal hole 40 a formed inside the first seal portion 401.

Since the first seal member 40 has elasticity as described above, the first seal portion 401 also has elasticity. Further, as can be seen from the arrangement of the first seal hole 40a, the first seal portion 401 surrounds the open end 305b of the first radial hole 305a facing the inside in the valve radial direction DRr over the entire circumference. Is formed.

Furthermore, the first seal portion 401 is clamped between the valve body 30 and the main valve 32. Specifically, the first seal portion 401 is sandwiched between the valve chamber peripheral wall portion 302 of the valve body 30 and the main valve peripheral wall portion 321 of the main valve 32 in the valve radial direction DRr. With such a configuration, the first seal portion 401 seals around the open end 305b of the first radial hole 305a in the valve chamber 301a.

Moreover, the 1st seal | sticker part 401 has the cyclic | annular 1st seal | sticker surface 401a as an edge part provided inside the valve radial direction DRr. The first seal surface 401 a is in contact with the outer peripheral surface 321 d of the main valve peripheral wall portion 321, and slides as the main valve 32 rotates.

The second seal member 42 has the same configuration as the first seal member 40 except for its arrangement. That is, the second seal member 42 is formed with a second seal hole 42a penetrating the second seal member 42 in the valve diameter direction DRr. The second seal member 42 is disposed such that the center of the second seal hole 42a is aligned with the center of the open end 306b of the second radial hole 306a. The hole diameter of the second seal hole 42a is slightly larger than the hole diameter of the opening end 306b of the second radial hole 306a.

For example, when the main valve 32 is positioned at the second rotational position, the second radial hole 306a of the valve body 30 is connected to the second seal hole 42a, the main valve through hole 321a, and the sub valve through hole 341a in order. The valve body 30 communicates with the axial hole 307a.

The second seal member 42 has a second seal portion 421. The second seal portion 421 has a second seal hole 42 a formed inside the second seal portion 421. The second seal portion 421 has elasticity like the first seal portion 401. The second seal portion 421 has an annular shape and is formed so as to surround the open end 306b of the second radial hole 306a facing the inside in the valve radial direction DRr over the entire circumference.

Further, the second seal portion 421 is pinched between the valve body 30 and the main valve 32. More specifically, like the first seal portion 401, the second seal portion 421 is also pinched in the valve radial direction DRr between the valve chamber peripheral wall portion 302 of the valve body 30 and the main valve peripheral wall portion 321 of the main valve 32. Has been. With such a configuration, the second seal portion 421 seals around the open end 306b of the second radial hole 306a in the valve chamber 301a.

Also, the second seal portion 421 has an annular second seal surface 421a as an end portion provided inside the valve radial direction DRr. The second seal surface 421a is in contact with the outer peripheral surface 321d of the main valve peripheral wall portion 321 and slides as the main valve 32 rotates.

As shown in FIGS. 3 and 7, the diameter of the first seal hole 40a is slightly larger than the diameter of the one end 321b of the main valve through-hole 321a. Therefore, when the main valve 32 is positioned at the first rotation position, one end 321b of the main valve through hole 321a is a range obtained by projecting the first seal hole 40a in the axial direction of the first seal hole 40a. Fits within. That is, the peripheral edge of one end 321b of the main valve through hole 321a does not intersect the first seal surface 401a that forms the peripheral edge of the first seal hole 40a on the main valve 32 side, and one end 321b of the main valve through hole 321a. Fits on the inner peripheral side of the first seal surface 401a.

Similarly, the diameter of the second seal hole 42a is slightly larger than the diameter of the one end 321b of the main valve through hole 321a. Therefore, when the main valve 32 is positioned at the second rotation position, one end 321b of the main valve through hole 321a is obtained by projecting the second seal hole 42a in the axial direction of the second seal hole 42a. Fits within. That is, the peripheral edge of one end 321b of the main valve through hole 321a does not intersect the second seal surface 421a that forms the peripheral edge of the second seal hole 42a on the main valve 32 side, and one end 321b of the main valve through hole 321a. Fits on the inner peripheral side of the second seal surface 421a.

In FIG. 7, the first seal member 40 and the second seal member 42 are indicated by a two-dot chain line. In FIG. 7, the first seal member 40 is displayed so as to overlap the outer peripheral surface 321d of the main valve peripheral wall 321 when the main valve 32 is in the first rotation position. In addition, in FIG. 7, the second seal member 42 is displayed so as to overlap the outer peripheral surface 321d of the main valve peripheral wall 321 when the main valve 32 is in the second rotational position.

2 and FIG. 8, the main valve 32 is rotationally driven by a drive device 44 indirectly via a sub valve 34. In other words, the main valve 32 is a driven valve that rotates along with the sub valve 34 driven by the drive device 44. In order to rotate the main valve 32 according to the sub-valve 34 as described above, the inlet side three-way valve 18 has a rotation connecting / disconnecting portion 46 as a link mechanism for connecting / disconnecting torque transmission between the main valve 32 and the sub-valve 34. I have.

The rotation connecting / disconnecting portion 46 rotates the main valve 32 together with the sub valve 34 when the sub valve 34 is rotated by a predetermined first rotation operation. On the other hand, the rotation connecting / disconnecting portion 46 allows the sub valve 34 to rotate relative to the main valve 32 when the sub valve 34 is rotated by a predetermined second rotation operation. The first rotation operation and the second rotation operation are both mechanical rotation operations of the auxiliary valve 34 determined by the structure of the rotation connecting / disconnecting portion 46, and the second rotation operation is a rotation operation different from the first rotation operation. It is.

Specifically, as shown in FIGS. 2, 8, and 9, the rotation connecting / disconnecting portion 46 includes a groove forming portion 461 included in the main valve 32 and a protrusion 462 included in the auxiliary valve 34. Yes.

The groove forming portion 461 forms a groove 461a extending in the valve circumferential direction DRc. The groove forming portion 461 is included in the end portion 322 in detail in the main valve 32. Further, the groove 461a of the groove forming portion 461 extends, for example, in a C shape, and is open to the other side in the valve axial direction DRa, that is, the sub valve 34 side.

Furthermore, the groove 461a has one end 461b and the other end 461c in the valve circumferential direction DRc. That is, the groove forming portion 461 has an end forming portion 461d that forms one end 461b of the groove 461a and an other end forming portion 461e that forms the other end 461c of the groove 461a. One end 461b of the groove 461a is provided on one side of the groove 461a in the valve circumferential direction DRc, and the other end 461c of the groove 461a is provided on the other side of the groove 461a in the valve circumferential direction DRc.

The protrusion 462 of the rotation connecting / disconnecting portion 46 is formed so as to protrude to one side in the valve axial direction DRa at one end 342 of the sub valve 34. The protrusion 462 is inserted into the groove 461 a of the rotation connecting / disconnecting portion 46.

The protrusion 462 has one end 462a on one side in the valve circumferential direction DRc, and the other end 462b on the other side in the valve circumferential direction DRc. Accordingly, one end 462a of the projection 462 abuts on the one end forming portion 461d when the sub valve 34 is rotated to one side in the valve circumferential direction DRc. Further, the other end 462b of the protrusion 462 abuts against the other end forming portion 461e when the sub valve 34 is rotated to the other side in the valve circumferential direction DRc.

Since the rotation connecting / disconnecting portion 46 has such a groove forming portion 461 and a protrusion 462, when the auxiliary valve 34 is rotated by the driving device 44 while pressing the protrusion 462 against the one end forming portion 461d. The main valve 32 is rotated together with the sub valve 34 to one side in the valve circumferential direction DRc. On the other hand, when the sub-valve 34 is rotated by the drive device 44 while pressing the protrusion 462 against the other end forming portion 461e, the rotation connecting / disconnecting portion 46 moves the main valve 32 to the other side in the valve circumferential direction DRc. The auxiliary valve 34 is rotated together. Therefore, the rotation of the auxiliary valve 34 while the protrusion 462 is pressed against the one end forming portion 461d or the other end forming portion 461e corresponds to the first rotating operation.

In addition, the rotation connecting / disconnecting portion 46 is configured such that when the auxiliary valve 34 is rotated with the protrusion 462 away from the one end forming portion 461d and the other end forming portion 461e within the groove 461a, the auxiliary valve 34 is in relation to the main valve 32. Allow relative rotation. In short, in that case, the protrusion 462 only moves in the groove circumferential direction DRc in the groove 461a. For example, in the state shown in FIG. 8, the sub valve 34 is allowed to rotate to the other side in the valve circumferential direction DRc with respect to the main valve 32 as indicated by an arrow AR1. Accordingly, the fact that the protrusion 462 moves away from the one end forming portion 461d and the other end forming portion 461e within the groove 461a and the auxiliary valve 34 is rotated corresponds to the second rotating operation.

For example, in the present embodiment, the rotation angle AGp (see FIG. 8) of the auxiliary valve 34 that allows the auxiliary valve 34 to rotate relative to the main valve 32 is the auxiliary valve through-hole about the valve axis CLv. 341a is larger than the angle AGh (see FIG. 3) that extends in the valve circumferential direction DRc. The rotation angle AGp of the sub-valve 34 that allows the sub-valve 34 to rotate relative to the main valve 32 is, in other words, from the state in which the protrusion 462 contacts the one end forming portion 461d. Is an angle AGp that rotates around the valve axis CLv until it comes into contact with.

Here, the three-way valve 90 of the comparative example compared with this embodiment is demonstrated. Of the three-way valve 90 of the comparative example, the same or equivalent parts as those of the inlet-side three-way valve 18 of the present embodiment will be described by omitting or simplifying them.

The three-way valve 90 of the comparative example shown in FIG. 10 functions as a switching flow control valve, similarly to the inlet-side three-way valve 18 of the present embodiment. The three-way valve 90 of this comparative example includes a main valve 92, but does not include the auxiliary valve 34, unlike the inlet-side three-way valve 18 of the present embodiment.

Therefore, in the three-way valve 90 of the comparative example, the drive shaft 36 is connected to the main valve 92. Therefore, the main valve 92 is rotated around the valve axis CLv as indicated by an arrow AR2 in FIG. And the main valve through-hole 921a formed in the main valve 92 is not a circular hole but has a hole shape extending in the valve circumferential direction DRc as shown in FIG. Except for these points, the main valve 92 included in the three-way valve 90 of the comparative example is the same as the main valve 32 included in the inlet-side three-way valve 18 of the present embodiment.

In the three-way valve 90 of the comparative example, the first seal member 40 and the second seal member 42 are the same as those of the inlet-side three-way valve 18 of this embodiment as shown in FIG. Further, since the first seal member 40 and the second seal member 42 have the same configuration, they are shown in FIG. 12, which is a common view.

In the three-way valve 90 of such a comparative example, when adjusting the flow rate of the fluid (for example, cold water) that passes through the first radial hole 305a, as shown in FIGS. The flow rate of the fluid is determined by the area of the overlapping main valve through hole 921a. Therefore, when adjusting the flow rate, the main valve through-hole 921a straddles the first seal surface 401a that forms the peripheral edge of the first seal hole 40a on the main valve 92 side. The same applies to the flow rate adjustment for the second radial hole 306a. In FIG. 13, the portion where the main valve through hole 921a straddles the seal surfaces 401a and 421a is indicated by being surrounded by two-dot chain lines CR1 and CR2.

For example, as shown in FIGS. 14 and 15, the main valve through hole 921a overlaps the second seal surface 421a when the flow rate is adjusted with respect to the second radial hole 306a, that is, when warm water is passed. Therefore, the second seal member 42 expands into the main valve through hole 921a. For example, in FIG. 15, the B1 portion of the second seal member 42 is the expanded portion.

When the state where the main valve through hole 921a overlaps the second seal surface 421a is maintained for a certain period of time, the second seal surface 421a gradually bites into the main valve through hole 921a, and the second seal surface A step occurs in 421a.

Thus, when the main valve 92 is rotated as indicated by the arrow ARrt, for example, with the step formed on the second seal surface 421a, the second seal hole 42a is closed and the first seal hole 40a is opened. Then, cold water flows from the first radial hole 305a into the valve chamber 301a. Then, the second seal member 42 that has been expanded by the hot water is cured by the cold water. In FIG. 14, illustration of the outside of the valve chamber 301a is omitted, and this also applies to FIG.

As a result, as shown in FIGS. 16 and 17, a step remains on the second seal surface 421a, and the sealing performance of the second seal surface 421a with respect to the main valve 92 is deteriorated. When the sealing performance of the second seal surface 421a is deteriorated in such a manner, for example, cold water passes between the second seal surface 421a and the main valve 92 as indicated by an arrow FLes and from the valve chamber 301a to the second radial hole 306a. It will leak out.

In the three-way valve 90 of the comparative example, the steps of the seal surfaces 401a and 421a that cause fluid leakage as described above are likely to occur significantly when there are temperature differences in the plurality of fluids flowing through the three-way valve 90. Though conceivable, it may occur even if there is no temperature difference in the fluid flowing through the three-way valve 90.

In contrast to the comparative example as described above, according to the present embodiment, as shown in FIGS. 2 and 3, the sub-valve 34 that is not in direct contact with the seal portions 401 and 421 is connected to the main valve through hole 321a. The area covering the other end 321c of the valve is increased or decreased by rotating around the valve axis CLv. Therefore, the inlet side three-way valve 18 can adjust the flow rate of the fluid passing through the inlet side three-way valve 18 by the rotation of the sub valve 34.

Therefore, the main valve 32 of the inlet side three-way valve 18 does not need to adjust the flow rate of the fluid, and it is sufficient to selectively open and close the first radial hole 305a and the second radial hole 306a. That is, when the flow rate of the fluid is adjusted, the state in which the peripheral edge of the one end 321b of the main valve through hole 321a intersects the seal surfaces 401a and 421a of the seal portions 401 and 421 is not continued. As a result, it is difficult for steps to remain on the seal surfaces 401a and 421a of the seal portions 401 and 421, and the sealability of the seal portions 401 and 421 can be kept good. In short, it is possible to adjust the flow rate of the fluid so as not to deteriorate the sealing performance of the seal portions 401 and 421.

Further, according to the present embodiment, as shown in FIGS. 2 and 3, the main valve peripheral wall portion 321 surrounds the auxiliary valve 34 around the valve axis CLv over the entire periphery thereof. The main valve through hole 321a is formed so as to penetrate the main valve peripheral wall portion 321 in the valve radial direction DRr. Therefore, since the auxiliary valve 34 is disposed inside the main valve peripheral wall 321 in the valve radial direction DRr, it is easy to suppress the volume occupied by the entire main valve 32 and the auxiliary valve 34.

Further, according to the present embodiment, as shown in FIG. 2, the opening end 307 b of the axial hole 307 a formed in the valve body 30 is disposed on the inner side in the valve radial direction DRr than the auxiliary valve peripheral wall portion 341. Yes. That is, since the main valve peripheral wall portion 321 is disposed outside the sub valve peripheral wall portion 341 in the valve radial direction DRr, the opening end 307b of the axial hole 307a is positioned in the valve radial direction DRr rather than the main valve peripheral wall portion 321. Is arranged inside. Therefore, it is possible to maintain the state in which the axial hole 307a is opened to the valve chamber 301a regardless of the rotational position of the main valve 32.

Further, according to the present embodiment, as shown in FIGS. 5 and 6, the auxiliary valve through-hole 341 a has a portion where the hole width Wh in the valve axial direction DRa becomes narrower toward one side in the valve circumferential direction DRc. The through hole 341a has one side in the valve circumferential direction DRc. For example, the auxiliary valve 34 increases the area Ah of the auxiliary valve through hole 341a that overlaps the other end 321c of the main valve through hole 321a with the rotation of the auxiliary valve 34, so that the auxiliary valve peripheral wall 341 passes through the main valve. The area covering the other end 321c of the hole 321a is reduced. Therefore, by defining the shape of the sub valve through hole 341a, it is possible to easily determine the relationship between the rotation of the sub valve 34 and the change in the opening of the main valve through hole 321a.

Further, according to the present embodiment, as shown in FIGS. 2 and 8, the rotation connecting / disconnecting portion 46 allows the main valve 32 to be connected to the auxiliary valve 34 when the auxiliary valve 34 is rotated by a predetermined first rotation operation. Rotate with valve 34. On the other hand, the rotation connecting / disconnecting portion 46 allows the sub valve 34 to rotate relative to the main valve 32 when the sub valve 34 is rotated by a predetermined second rotation operation. Therefore, as long as the drive device 44 is connected to the sub valve 34 as in the present embodiment, the main valve 32 can be rotated via the rotation connecting / disconnecting portion 46 without being connected to the main valve 32. The drive device 44 can be configured simply.

For example, the driving device 44 positions the main valve 32 in an arbitrary rotation position by rotating the sub valve 34 in the first rotation operation, and then rotates the sub valve 34 in the second rotation operation to return to the original rotation position. If it returns, it is possible to position the main valve 32 at an arbitrary rotational position without changing the rotational position of the auxiliary valve 34.

That is, the drive device 44 can position the main valve 32 at each of the first rotation position and the second rotation position by rotating the sub valve 34 in the first rotation operation. Further, the driving device 44 can adjust the opening degree of the main valve through-hole 321a, that is, the fluid flow rate without rotating the main valve 32 by rotating the sub valve 34 by the second rotation operation.

Further, according to the present embodiment, as shown in FIGS. 2 and 8, the rotation connecting / disconnecting portion 46 includes a groove forming portion 461 included in the main valve 32 and a protrusion 462 included in the sub valve 34. ing. Therefore, since it is not necessary to provide the rotation connecting / disconnecting portion 46 separately from the main valve 32 and the sub valve 34, it is easy to reduce the size of the inlet side three-way valve 18.

Further, according to the present embodiment, as shown in FIG. 2, the auxiliary valve 34 is a drive valve that is driven by the drive device 44 among the plurality of rotary valves 32, 34 included in the inlet side three-way valve 18. Therefore, the drive device 44 can rotate the auxiliary valve 34 without the rotation connecting / disconnecting portion 46, thereby adjusting the flow rate of the fluid. Thereby, for example, fine adjustment of the flow rate can be performed with high accuracy when adjusting the flow rate of the fluid.

Further, according to the present embodiment, as shown in FIGS. 1 and 2, in the first case where the first radial hole 305a is opened by the main valve 32 and the second radial hole 306a is closed, Cold water flows through the valve chamber 301a between the first radial hole 305a and the axial hole 307a. In the second case where the first radial hole 305a is closed and the second radial hole 306a is opened by the main valve 32, hot water having a temperature higher than that in the first case is in the second radial direction. It flows through the valve chamber 301a between the hole 306a and the axial hole 307a. Therefore, in an environment where the first seal portion 401 and the second seal portion 421 are repeatedly expanded and cured in accordance with the temperature of the fluid (for example, hot water and cold water), the sealing performance of the seal portions 401 and 421 is kept good. It is possible.

For example, if a leak occurs in the first seal portion 401 or the second seal portion 421 of the inlet side three-way valve 18, warm water and cold water circulated in the integrated heat management system 10 are slightly mixed. Then, since it becomes difficult to obtain hot or cold water at a desired temperature, the compressor 121 of the refrigeration cycle apparatus 12 must perform extra work, and the power consumption of the compressor 121 increases. Therefore, the internal sealing performance of the inlet side three-way valve 18 is an important function that greatly affects the fuel consumption of an automobile in which the integrated heat management system 10 is mounted.

For adjusting the heat load on the first device 11a, for example, the inlet side three-way valve 18 operates frequently for the purpose of adjusting the flow rate of the fluid. At this time, since the auxiliary valve 34 that rotates to adjust the flow rate does not slide directly with the seal portions 401 and 421, wear of the seal portions 401 and 421 can be suppressed. That is, the durability of the inlet side three-way valve 18 can be improved.

Further, according to the present embodiment, as shown in FIGS. 2 and 3, the main valve 32 is responsible for opening and closing the radial holes 305a and 306a. Therefore, for example, as compared to the case where the radial holes 305a, 306a are opened and closed and the flow rate is adjusted with one valve, such as the three-way valve 90 of the comparative example, the auxiliary valve through hole is centered on the valve axis CLv. It is easy to ensure a large angle AGh at which 341a extends in the valve circumferential direction DRc. Therefore, it is possible to easily improve the accuracy of the fluid flow rate adjustment by the rotation of the auxiliary valve 34.

(Second Embodiment)
Next, a second embodiment will be described. In the present embodiment, differences from the first embodiment will be mainly described. The same or equivalent parts as those in the first embodiment will be omitted or simplified for explanation. The same applies to a third embodiment described later.

As shown in FIG. 18, in the inlet-side three-way valve 18 of the present embodiment, the main valve through hole 321a and the sub valve through hole 341a pass through the valve axial direction DRa, respectively. In short, the inlet side three-way valve 18 of the present embodiment is a so-called thrust valve. The inlet side three-way valve 18 of the present embodiment differs from the inlet side three-way valve 18 of the first embodiment mainly in this respect. In FIG. 18, the valve main body 30 is indicated by a two-dot chain line in order to display the difference of the present embodiment with respect to the first embodiment in an easily understandable manner, and the first seal member 40, the second seal member 42, and the drive device 44. And the rotation connecting / disconnecting portion 46 are omitted.

Specifically, in the present embodiment, a first opening / closing circulation hole 301b corresponding to the first radial hole 305a of the first embodiment and a second opening / closing circulation hole 301c corresponding to the second radial hole 306a of the first embodiment. Each open to the valve chamber 301 a at the other end 304 of the valve chamber forming portion 301. In addition, an opening circulation hole 301 d corresponding to the axial hole 307 a of the first embodiment opens to the valve chamber 301 a at the valve chamber peripheral wall portion 302.

Moreover, as shown in FIG. 18, the main valve 32 and the subvalve 34 are accommodated in the valve chamber 301a. The main valve 32 has a disc shape centered on the valve axis CLv, and rotates around the valve axis CLv as indicated by an arrow AR3. The main valve 32 selectively opens and closes the first opening / closing circulation hole 301b and the second opening / closing circulation hole 301c by rotating around the valve axis CLv.

The auxiliary valve 34 has a disc shape centered on the valve axis CLv, and rotates around the valve axis CLv as indicated by an arrow AR3. Similarly to the first embodiment, the sub-valve through hole 341a of the present embodiment has a hole shape extending in the valve circumferential direction DRc, but is different from the first embodiment in that it penetrates in the valve axial direction DRa. Is different.

And the subvalve 34 of this embodiment is arrange | positioned on the other side on both sides of the main valve 32 with respect to the 1st on-off flow hole 301b and the 2nd on-off flow hole 301c in the valve-axis direction DRa. From such an arrangement, the sub valve 34 increases or decreases the area covering the other end 321c of the main valve through-hole 321a by rotating around the valve axis CLv.

For example, when the main valve 32 is positioned at the rotational position where the main valve through hole 321a is arranged in series in the valve axial direction DRa with respect to the first opening / closing flow hole 301b, that is, the first rotational position, One end 321b of 321a is opposed to the opening end 301e of the first opening / closing circulation hole 301b. Thereby, the main valve 32 opens the opening end 301e of the first opening / closing circulation hole 301b. At the same time, the main valve 32 closes the open end 301f of the second opening / closing flow hole 301c.

When the main valve 32 is positioned at the rotational position where the main valve through-hole 321a is arranged in series in the valve axial direction DRa with respect to the second opening / closing flow hole 301c, that is, the second rotational position, One end 321b of 321a is opposed to the opening end 301f of the second opening / closing circulation hole 301c. Thereby, the main valve 32 opens the opening end 301f of the second opening / closing flow hole 301c. At the same time, the main valve 32 closes the opening end 301e of the first opening / closing circulation hole 301b.

In this embodiment, it is possible to obtain the same effects as those of the first embodiment, which are obtained from the configuration common to the first embodiment.

(Third embodiment)
Next, a third embodiment will be described. In the present embodiment, differences from the first embodiment will be mainly described.

As shown in FIG. 19, the inlet side three-way valve 18 of this embodiment includes two seal members 50 and 52 provided between the main valve 32 and the sub valve 34. This embodiment is different from the first embodiment in this point.

Specifically, in this embodiment, the two seal members 50 and 52 are both made of an elastic body such as rubber. The two seal members 50 and 52 are, for example, O-rings, and are formed in an annular shape around the valve axis CLv.

As shown in FIG. 19, the two seal members 50 and 52 are both disposed between the main valve peripheral wall portion 321 and the sub valve peripheral wall portion 341. The two seal members 50 and 52 are compressed and elastically deformed in the valve radial direction DRr by the main valve peripheral wall portion 321 and the sub valve peripheral wall portion 341.

Further, the one-side seal member 50 that is one of the two seal members 50 and 52 is disposed on one side in the valve axial direction DRa with respect to both the main valve through-hole 321a and the sub-valve through-hole 341a. Has been. The other seal member 52, which is the other of the two seal members 50, 52, is disposed on the other side in the valve axial direction DRa with respect to both the main valve through hole 321a and the sub valve through hole 341a. Has been.

Since the two seal members 50 and 52 are thus provided, when the fluid flows from the main valve through hole 321a to the sub valve through hole 341a as indicated by an arrow AR4, the main valve peripheral wall 321 and the sub valve peripheral wall 341 are provided. The fluid flow passing between is blocked. That is, the fluid flow flowing as indicated by the arrow AR5 is blocked. As a result, it is possible to suppress the flow rate of the fluid flowing into the axial hole 307a without passing through the sub valve through hole 341a. Therefore, it is possible to improve the accuracy of the flow rate adjustment of the fluid by the auxiliary valve 34.

In addition, although this embodiment is a modification based on 1st Embodiment, it is also possible to combine this embodiment with the above-mentioned 2nd Embodiment.

(Other embodiments)
(1) Since the switching flow regulating valve shown in the first embodiment described above is the inlet side three-way valve 18, the switching flow regulating valve is a three-way valve having a total of three connection ports. There is no limit to the number. For example, the switching flow regulating valve may be a two-way valve having two connection ports. The same applies to the second embodiment and the third embodiment.

If the switching flow regulating valve is such a two-way valve, the switching flow regulating valve opens and closes the flow path through which the fluid flows and adjusts the flow rate of the fluid. When the switching flow regulating valve is a two-way valve, for example, the axial hole 307a in FIG. 2 is provided, but the number of the radial holes 305a and 306a is one.

(2) In each of the above-described embodiments, the inlet-side three-way valve 18 shown in FIG. 1 has a flow rate switching function in addition to a flow-path switching function for switching the flow path through which the fluid flows. Is provided with the flow path switching function but not the flow rate adjustment function. However, this is merely an example, and conversely, although the inlet side three-way valve 18 has a flow path switching function, it does not have a flow rate adjustment function, and the outlet side three-way valve 19 has a flow path switching function and a flow rate adjustment function. It does not matter if both are provided. In short, in the integrated heat management system 10 of FIG. 1, one of the inlet side three-way valve 18 and the outlet side three-way valve 19 only needs to have a flow rate adjusting function.

(3) In the above-described first embodiment, the sub-valve through hole 341a is composed of the central hole portion 341d, the one side hole portion 341e, and the other side hole portion 341f, but this is an example. For example, the sub-valve through hole 341a may not have any of those holes 341d, 341e, and 341f.

In short, the auxiliary valve through hole 341a has a portion where the hole width Wh in the valve axial direction DRa becomes narrower toward one side in the valve circumferential direction DRc on at least one side in the valve circumferential direction DRc in the auxiliary valve through hole 341a. It is preferable. Alternatively, the auxiliary valve through hole 341a has a portion where the hole width Wh in the valve axial direction DRa is narrower toward the other side in the valve circumferential direction DRc on at least the other side in the valve circumferential direction DRc in the auxiliary valve through hole 341a. It is preferable.

Further, the sub valve through hole 341a may have any hole shape as long as the hole width Wh in the valve axial direction DRa changes according to the position in the valve circumferential direction DRc. For example, the sub-valve through hole 341a may have a triangular hole shape in which the hole width Wh in the valve axial direction DRa becomes narrower toward one side in the valve circumferential direction DRc. If the sub valve through hole 341a has such a triangular hole shape, the sub valve through hole 341a has a hole shape in which the hole width Wh in the valve axial direction DRa becomes narrower toward one side in the valve circumferential direction DRc. 341a is provided over the entire valve circumferential direction DRc.

(4) In each of the embodiments described above, the auxiliary valve 34 is formed with the auxiliary valve through hole 341a, but this is an example. That is, if the area where the sub valve 34 covers the other end 321c of the main valve through hole 321a is increased or decreased according to the rotation of the sub valve 34, it is not necessary to provide the sub valve through hole 341a in the sub valve 34.

(5) In the first embodiment described above, the sub-valve 34 covers at least a part of the other end 321c of the main valve through-hole 321a as the sub-valve 34 rotates, but other than the main valve through-hole 321a. The entire end 321c may or may not be covered. For example, if all of the sub-valve through hole 341a is detached from the other end 321c of the main valve through-hole 321a with the rotation of the sub-valve 34, the sub-valve 34 removes all of the other end 321c of the main valve through-hole 321a from the sub-valve peripheral wall. It will be covered with a part 341.

(6) As shown in FIG. 2 in the first embodiment described above, the opening end 307b of the axial hole 307a formed in the valve body 30 is disposed on the inner side of the auxiliary valve peripheral wall portion 341 in the valve radial direction DRr. This is just an example. For example, the entire opening end 307b of the axial hole 307a may not be disposed on the inner side of the auxiliary valve peripheral wall portion 341 but only on the inner side of the main valve peripheral wall portion 321.

(7) In each of the above-described embodiments, as shown in FIG. 2, the main valve 32 has the groove forming portion 461 of the rotation connecting / disconnecting portion 46, and the sub valve 34 has the projection 462 of the rotation connecting / disconnecting portion 46. This is an example. For example, conversely, the main valve 32 may have the protrusion 462 and the sub valve 34 may have the groove forming portion 461.

(8) In each of the above-described embodiments, the inlet-side three-way valve 18 includes the rotation connecting / disconnecting portion 46, but the rotation connecting / disconnecting portion 46 is not essential. For example, if the driving device connected to the main valve 32 is provided separately from the driving device 44 connected to the sub valve 34, the rotation connecting / disconnecting portion 46 may not be provided.

(9) As shown in FIGS. 2 and 8 in each of the above-described embodiments, the sub valve 34 is a drive valve that is driven by the drive device 44, and the main valve 32 is a driven valve that rotates according to the drive valve. However, conversely, the main valve 32 may be a drive valve and the sub valve 34 may be a driven valve. In such a case, the drive device 44 can rotate the main valve 32 between the first rotation position and the second rotation position by rotating the main valve 32 in the first rotation operation.

When the flow rate of the fluid is adjusted in a state where the main valve 32 is positioned at the first rotation position, for example, the drive device 44 first rotates the main valve 32 by the first rotation operation to thereby rotate the sub valve. 34 is positioned at an arbitrary rotational position. Next, the drive device 44 rotates the main valve 32 in the second rotation operation to return to the first rotation position. As a result, the sub valve 34 can be positioned at an arbitrary rotational position, so that the flow rate of the fluid can be adjusted with the rotational position of the main valve 32 as the first rotational position. This is the same even if the rotation position of the main valve 32 is replaced from the first rotation position to the second rotation position.

(10) As shown in FIG. 2 in the first embodiment, the axial hole 307a is open to the valve chamber 301a at the other end 304 of the valve chamber forming portion 301. There is no limitation on the location where the hole 307a is provided.

(11) In each of the above-described embodiments, the valve body 30, the first seal member 40, and the second seal member 42 are each configured as separate parts, but may be an integral component.

(12) In the first embodiment described above, the diameter of the outer peripheral surface 321d of the main valve peripheral wall portion 321 is uniform at any position in the valve axial direction DRa. For example, the outer peripheral surface 321d is shown in FIG. As shown, it may have a spherical shape. In this case, the first seal portion 401 and the second seal portion 421 are shaped to match the spherical outer peripheral surface 321d.

(13) In each of the above-described embodiments, as shown in FIGS. 2 and 8, the rotation connecting / disconnecting portion 46 includes a groove forming portion 461 included in the main valve 32 and a protrusion 462 included in the sub valve 34. This is just an example. For example, the rotation connecting / disconnecting portion 46 may be configured by a one-way clutch provided between the main valve 32 and the sub valve 34 instead of the groove forming portion 461 and the protrusion 462.

When the rotation connecting / disconnecting portion 46 is configured by a one-way clutch, the drive device 44 rotates the sub-valve 34 in the engaging direction for engaging the one-way clutch, thereby rotating the sub-valve 34 in the rotation direction. The main valve 32 can be rotated together with the sub valve 34 in the same direction. Thereby, the inlet-side three-way valve 18 can switch the flow path.

On the other hand, the driving device 44 rotates the main valve 32 by rotating the sub valve 34 in the releasing direction for releasing the one-way clutch (that is, the rotating direction opposite to the engaging direction). The auxiliary valve 34 can be rotated without any trouble. Thereby, the inlet side three-way valve 18 can adjust the flow rate of the fluid.

In the example in which the rotation connecting / disconnecting portion 46 is constituted by a one-way clutch, the rotation of the auxiliary valve 34 in the engagement direction of the one-way clutch corresponds to the first rotation operation. Then, the rotation of the sub valve 34 in the one-way clutch release direction corresponds to the second rotation operation.

As another example, the rotation connecting / disconnecting portion 46 may be formed of a belt-like belt-like member wound around the drive shaft 36 in a spiral shape instead of the groove forming portion 461 and the protrusion 462. When the rotation connecting / disconnecting portion 46 is formed of a strip-like member, the strip-like member has flexibility. The belt-shaped member has one end on the spiral inner peripheral side and the other end on the spiral outer peripheral side. Further, one end of the belt-like member is fixed to a part of the outer peripheral surface of the drive shaft 36, and the other end of the belt-like member is fixed to the main valve 32.

Then, the drive device 44 connected to the drive shaft 36 rotates the drive shaft 36 and the sub valve 34 in the direction in which the belt member is wound, thereby generating tension in the belt member, and the rotation direction of the sub valve 34. The main valve 32 can be rotated together with the sub valve 34 in the same direction. Thereby, the inlet-side three-way valve 18 can switch the flow path.

On the contrary, the drive device 44 rotates the sub-valve 34 without rotating the main valve 32 by rotating the drive shaft 36 and the sub-valve 34 in the direction of loosening the winding of the belt-shaped member. Can do. Thereby, the inlet side three-way valve 18 can adjust the flow rate of the fluid.

In the example in which the rotation connecting / disconnecting portion 46 is configured by a band-shaped member, the sub-valve 34 is rotated in a state where the band-shaped member is already wound and tightened in the direction in which the band-shaped member is wound. Applicable. And it is said 2nd rotation operation that the subvalve 34 is rotated in the loose state where the belt-shaped member is not tightened.

(14) Note that the present disclosure is not limited to the above-described embodiment. The present disclosure includes various modifications and modifications within the equivalent range. In addition, the above embodiments are not irrelevant to each other, and can be appropriately combined unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes.

Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. In each of the above embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, etc., unless otherwise specified, or in principle limited to a specific material, shape, positional relationship, etc. The material, shape, positional relationship, etc. are not limited.

(Summary)
According to the first aspect shown in a part or all of the above embodiments, the main valve opposes one end of the main valve through hole to the open end of the opening / closing flow hole as the main valve rotates. The opening and closing flow hole is opened. The sub valve covers at least a part of the other end of the main valve through hole as the sub valve rotates, and increases or decreases by rotating an area covering the other end of the main valve through hole around a single axis. To do.

According to the second aspect, the main valve has a main valve peripheral wall portion surrounding the auxiliary valve around the uniaxial center, and the main valve through-hole has a diameter of the uniaxial center of the main valve peripheral wall portion. It is formed to penetrate in the direction. Therefore, since the auxiliary valve is disposed inside the main valve peripheral wall in the radial direction, it is easy to suppress the volume occupied by the entire main valve and auxiliary valve.

Further, according to the third aspect, the opening end of the opening circulation hole is arranged inside the main valve peripheral wall portion in the radial direction. Therefore, it is possible to maintain the state where the opening circulation hole is opened to the valve chamber regardless of the rotation position of the main valve.

Further, according to the fourth aspect, the auxiliary valve through-hole has a portion in which the axial hole width of the uniaxial center becomes narrower toward one side in the circumferential direction of the uniaxial center in the auxiliary valve through-hole. At least on one side in the circumferential direction. Then, the auxiliary valve increases the area of the auxiliary valve through hole that overlaps the other end of the main valve through hole with the rotation of the auxiliary valve, thereby reducing the area of the auxiliary valve peripheral wall covering the other end of the main valve through hole. . Therefore, by determining the shape of the sub valve through hole, it is possible to easily determine the relationship between the rotation of the sub valve and the change in the opening of the main valve through hole.

Further, according to the fifth aspect, the rotation connecting / disconnecting portion is configured such that when the drive valve that is one of the main valve and the sub valve is rotated by a predetermined first rotation operation, the main valve and the sub valve The driven valve, which is the other of these, is rotated together with the drive valve. On the other hand, the rotation connecting / disconnecting portion allows the drive valve to rotate relative to the driven valve when the drive valve is rotated by a predetermined second rotation operation different from the first rotation operation. . Therefore, if the drive device is connected to the drive valve, it is not necessary to be connected to the driven valve, so that the drive device can be configured simply.

For example, if the drive device rotates the drive valve in the first rotation operation and positions the driven valve at an arbitrary rotation position, then the drive device rotates the drive valve in the second rotation operation and returns to the original rotation position. It is possible to position the driven valve at an arbitrary rotational position without changing the rotational position of the valve.

According to the sixth aspect, one of the drive valve and the driven valve has a groove forming portion that forms a groove extending in the circumferential direction of the uniaxial center, and the drive valve and the driven valve The other valve has a protrusion inserted into its groove. And the rotation connection / disconnection part is comprised from the groove | channel formation part and protrusion. Therefore, it is not necessary to provide a rotation connecting / disconnecting part separately from the drive valve and the driven valve, and it is easy to reduce the size of the switching flow regulating valve.

Further, according to the seventh aspect, since the drive valve is a sub-valve, the drive device can rotate the sub-valve without going through the rotation connecting / disconnecting portion, thereby adjusting the flow rate of the fluid. . Therefore, fine adjustment of the flow rate can be performed with high accuracy when adjusting the flow rate of the fluid.

Further, according to the eighth aspect, the switching flow control valve is mounted on the automobile.

According to the ninth aspect, in the first case where the first opening / closing circulation hole is opened and the second opening / closing circulation hole is closed, the valve chamber is provided between the first opening / closing circulation hole and the opening circulation hole. The fluid flows through. Further, in the second case where the first opening / closing circulation hole is closed and the second opening / closing circulation hole is opened, a fluid having a higher temperature than the first case causes the second opening / closing circulation hole, the opening circulation hole, Circulates through the valve chamber. Therefore, it is possible to keep the sealability of the seal part favorable in an environment where the first seal part and the second seal part repeat expansion and hardening according to the temperature of the fluid.

Claims (9)

1. A switching flow control valve that switches or opens and closes the flow path of the fluid and adjusts the flow rate of the fluid,
   A valve body (30) having a valve chamber (301a), an open / close flow hole (301b, 301c, 305a, 306a) and an open flow hole (301d, 307a) that are open to the valve chamber and through which fluid flows; ,
   A main valve (32) that is housed in the valve chamber and that opens and closes the open / close flow hole by rotating about a uniaxial center (CLv);
   A secondary valve (34) housed in the valve chamber, disposed on the opposite side of the main valve with respect to the open / close flow hole, and rotated about the uniaxial center;
   The valve body is elastically sandwiched between the valve body and the main valve, and is formed to surround the open end (301e, 301f, 305b, 306b) of the open / close flow hole on the valve chamber side; A seal portion (401, 421) for sealing around the opening end of the open / close flow hole in the chamber,
   A main valve through hole (321a) is formed in the main valve,
   As the main valve rotates, the main valve opens the open / close flow hole by making one end (321b) of the main valve through hole face the open end of the open / close flow hole,
   The sub-valve covers at least a part of the other end (321c) of the main valve through-hole as the sub-valve rotates, and the area covering the other end of the main valve through-hole rotates around the uniaxial center. Switching flow adjustment that increases or decreases by doing.
2. The valve body has a valve chamber peripheral wall (302) that surrounds and forms the valve chamber around the uniaxial center,
   The open ends (305b, 306b) of the open / close flow holes (305a, 306a) are formed in the valve chamber peripheral wall,
   The main valve has a main valve peripheral wall portion (321) surrounding the auxiliary valve around the uniaxial center,
   The main valve through hole is formed through the main valve peripheral wall portion in the radial direction (DRr) of the uniaxial center,
   The switching flow control valve according to claim 1, wherein the seal portion is sandwiched between the valve chamber peripheral wall portion and the main valve peripheral wall portion.
3. The opening circulation hole (307a) has an opening end (307b) on the valve chamber side,
   The switching flow control valve according to claim 2, wherein an opening end of the opening circulation hole is disposed inside the main valve peripheral wall portion in the radial direction.
4. The auxiliary valve has an auxiliary valve peripheral wall portion (341) formed along the inner peripheral side of the main valve peripheral wall portion,
   In the auxiliary valve peripheral wall portion, an auxiliary valve through hole (341a) extending in the circumferential direction (DRc) of the uniaxial center is formed,
   The sub-valve through hole is a region where the hole width (Wh) in the axial direction (DRa) of the uniaxial center becomes narrower toward one side in the circumferential direction. On the side,
   The sub-valve increases the area (Ah) of the sub-valve through hole that overlaps the other end of the main valve through-hole with the rotation of the sub-valve, so that the sub-valve peripheral wall portion of the main valve through-hole The switching flow regulating valve according to claim 2 or 3, wherein an area covering the other end is reduced.
5. A drive device (44) connected to a drive valve that is one of the main valve and the sub-valve and rotating the drive valve;
   When the drive valve is rotated by a predetermined first rotation operation, the driven valve that is the other of the main valve and the sub valve is rotated together with the drive valve, which is different from the first rotation operation. A rotation connecting / disconnecting portion (46) that allows the drive valve to rotate relative to the driven valve when the drive valve is rotated in a predetermined second rotation operation. 5. The switching flow control valve according to any one of 4 to 4.
6. A drive device (44) connected to a drive valve that is one of the main valve and the sub-valve and rotating the drive valve;
   A rotation connecting / disconnecting portion (46) for connecting / disconnecting torque transmission between the driven valve, which is the other of the main valve and the sub valve, and the drive valve;
   One of the drive valve and the driven valve has a groove forming portion (461) that forms a groove (461a) extending in the circumferential direction (DRc) of the uniaxial center,
   The groove has one end (461b) and the other end (461c) in the circumferential direction,
   The groove forming portion has one end forming portion (461d) that forms one end of the groove and the other end forming portion (461e) that forms the other end of the groove,
   The other of the drive valve and the driven valve has a protrusion (462) inserted into the groove,
   The rotation connecting / disconnecting portion is composed of the groove forming portion and the protrusion,
   When the driving valve is rotated while pressing the protrusion against the one end forming part or the other end forming part, the rotation connecting / disconnecting part rotates the driven valve together with the driving valve, and the protrusion is 5. The drive valve according to claim 1, wherein the drive valve is allowed to rotate relative to the driven valve when the drive valve is rotated away from the one end forming portion and the other end forming portion within the groove. The switching flow control valve according to any one of the above.
7. The switching flow control valve according to claim 5 or 6, wherein the drive valve is the sub valve.
8. The switching flow regulating valve according to any one of claims 1 to 7, which is mounted on an automobile.
9. In addition to the seal part as the first seal part (401), the second seal part (421) having elasticity and sandwiched between the valve body and the main valve is provided,
   In addition to the open / close flow holes as the first open / close flow holes (301b, 305a), second open / close flow holes (301c, 306a) that open to the valve chamber and allow fluid to flow are formed in the valve body. Has been
   The second seal portion is formed so as to surround an opening end (301f, 306b) on the valve chamber side of the second opening / closing circulation hole, and seals around the opening end of the second opening / closing circulation hole in the valve chamber,
   The main valve selectively closes the first open / close flow hole and the second open / close flow hole by rotating around the uniaxial center, and the main valve through-hole is rotated along with the rotation of the main valve. Opening the second open / close flow hole by making one end face the open end of the second open / close flow hole;
   The sub-valve is disposed on the opposite side of the main valve with respect to the second opening / closing flow hole,
   In the first case where the first open / close flow hole is opened and the second open / close flow hole is closed, fluid flows between the first open / close flow hole and the open flow hole via the valve chamber. Circulate,
   In the second case where the first opening / closing circulation hole is closed and the second opening / closing circulation hole is opened, a fluid having a temperature higher than that in the first case causes the second opening / closing circulation hole and the opening circulation to flow. The switching flow control valve according to any one of claims 1 to 8, wherein the switching flow control valve flows through the valve chamber to and from a hole.

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