Distribution valve

Abstract

To provide a distribution valve configured to adjust a distribution ratio and total flow rate of fluid, and suppress leak when the total flow rate is zero.SOLUTION: A distribution valve which distributes fluid, flowing from an introduction port 15 into a valve body 20, into first and second lead ports, has a peripheral wall part and bottom face part 26a which function as a seal face part for closing the first and second lead ports and the introduction port. In the peripheral wall part, first and second opening parts 23, 24 are formed to successively change opening areas of the first and second lead ports by rotation of the valve body. In the bottom face part, a third opening part is formed to change an opening area of the introduction port within a predetermined range by rotation of the valve body. In the introduction port, a valve seat member 40 including a seal part 43 which comes into contact with the bottom face part for sealing is provided movably in an axial direction of the valve body. A supply pressure of the fluid pushes the valve seat member toward the valve body to bring the seal part into close contact with the bottom face part.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a distributing valve that controls the distribution of a fluid, and more particularly to a distributing valve that adjusts the distribution ratio and total flow rate of a fluid and has a blocking function that sets the total flow rate to zero. [Background technology]

[0002] Conventionally, hot water supply devices have been used that adjust the temperature by, for example, heating low-temperature clean water in a heating section and mixing the heated high-temperature water with the clean water to supply hot water. The hot water supply device adjusts the temperature of the high-temperature water by controlling the heating capacity of the heating section, and adjusts the temperature of the hot water by adjusting the mixing ratio of the high-temperature water and the clean water.

[0003] For example, Patent Document 1 describes a manual mixing faucet configured to adjust the mixing ratio of high-temperature water and clean water by adjusting the opening of two inlet ports corresponding to high-temperature water and clean water by rotating a valve body. Patent Document 2 describes a flow control valve (mixing valve) configured to adjust the mixing ratio of high-temperature water and clean water by adjusting the opening of two inlet ports for high-temperature water and clean water by rotating a cylindrical valve body with a stepping motor.

[0004] On the other hand, there is a type of hot water supply system that uses a distribution valve to distribute clean water to a heating section and a bypass passage that bypasses the heating section, and mixes the high-temperature water from the heating section with the clean water in the bypass passage to supply hot water. In such hot water supply systems, the mixing ratio of the high-temperature water and the clean water is adjusted by adjusting the distribution ratio in the distribution valve. For example, the mixing valve in Patent Document 2 can be used as a distribution valve by making the two inlet ports into outlet ports and making the outlet port of the mixed hot water into the inlet port for clean water, i.e., by reversing the flow direction of the fluid. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 63-24461 [Patent Document 2] JP 2009-228764 A Summary of the Invention [Problem to be solved by the invention]

[0006] The water heater has sufficient heating capacity for supplying hot water at a temperature of around 40°C, which is often the case in normal use. However, when a large heating capacity is required to heat low-temperature clean water at around 5°C to supply hot water at a high temperature set at around 60°C, the heating capacity may be insufficient due to the large hot water supply flow rate. In such a case, all of the clean water is supplied to the heating section, and the lack of heating capacity is compensated for by reducing the flow rate of clean water supplied to the water heater, thereby supplying hot water at the set temperature.

[0007] However, mixing valves or distributing valves with the flow direction of a mixing valve reversed, such as the mixing faucet in Patent Document 1 and the mixing valve in Patent Document 2, do not have a function for adjusting the total flow rate of mixed hot and cold water. Therefore, in hot water supply systems that use a mixing valve or distributing valve to mix high temperature water and low temperature water, it is common to reduce the flow rate of clean water supplied to the hot water supply system by restricting the hot water supply flow rate by adjusting a flow regulating valve provided, for example, downstream of the mixing valve or distributing valve.

[0008] Furthermore, in facilities such as lodging facilities and hospitals that may use large amounts of hot water at one time, linked hot water supply systems consisting of multiple linked hot water supply devices are used to accommodate large flow rates of hot water. Linked hot water supply systems supply hot water by changing the number of hot water supply devices that are operated according to the required heating capacity. In this case, a stop valve is installed at the inlet of each hot water supply device, for example, the water supply, and the stop valve of the hot water supply device that is not operated is closed, and the number of operating devices is changed by opening and closing the stop valve. Since unheated hot water does not flow out from the hot water supply device that is not operated, hot water at a set temperature can be supplied.

[0009] In a linked hot water supply system consisting of a hot water supply device using a distributing valve, for example, a stop valve is provided upstream of the distributing valve and a flow control valve is provided downstream, which makes the structure and control of the hot water supply device complicated, and improvements are desired. Therefore, studies are being conducted on providing a flow control mechanism and a blocking mechanism at the inlet (inlet port) of the distributing valve to add a flow control function and a blocking function that function in addition to adjusting the distribution ratio.

[0010] For example, the mixing valve of Patent Document 2 has a bottom part of the valve body that is opened and closed by rotating the valve body, which adds a flow rate adjustment function and a blocking function. However, even if the inlet is blocked, the clean water flows into the sealed part due to the supply pressure of the clean water, causing leakage, and it is difficult to make the total flow rate zero, especially when the supply pressure of the clean water is high. In addition, the seal part wears down due to repeated distribution ratio adjustment, flow rate adjustment, and blocking, and it is easy for gaps to form through which clean water can flow even when the inlet is blocked.

[0011] SUMMARY OF THE PRESENT EMBODIMENTS The present invention provides a dispensing valve that is configured to adjust the fluid distribution ratio and total flow rate, while suppressing leakage when the total flow rate is zero. [Means for solving the problem]

[0012] The distributing valve of the invention of claim 1 comprises a valve body having a first outlet, a second outlet and an inlet, a cylindrical valve element rotatably fitted into the valve body, and a drive means for rotating the valve element, the valve element having a peripheral wall portion functioning as a sealing surface portion for closing the first outlet and the second outlet and a bottom surface portion functioning as a sealing surface portion for closing the inlet, the peripheral wall portion is formed with a first opening portion and a second opening portion for continuously changing an opening area of ​​the first outlet and an opening area of ​​the second outlet by the rotation of the valve element, and the bottom surface portion is formed with a front opening portion and a rear opening portion. In a distributing valve in which a third opening is formed which changes the opening area of ​​the inlet within a predetermined range by rotating the valve body, and fluid flowing into the valve body from the inlet is distributed to the first outlet and the second outlet, a valve seat member having a seal portion which seals by abutting against the bottom surface portion is disposed in the inlet, the valve seat member is movable in the axial direction of the valve body, and is configured such that the seal portion is pressed toward the valve body by the supply pressure of the fluid acting on the inlet, causing the seal portion to come into close contact with the bottom surface portion.

[0013] According to the above configuration, the distributor distributes the fluid introduced into the cylindrical valve body from the inlet to the first outlet and the second outlet, and the inlet is provided with a valve seat member having a seal portion that abuts against the bottom surface of the valve body. This valve seat member is movable in the axial direction of the valve body, and is pressed by the supply pressure of the fluid so that the seal portion comes into close contact with the bottom surface of the valve body. Therefore, when the valve body is rotated to close the inlet, the seal portion of the valve seat member comes into close contact with the bottom surface of the valve body to prevent leakage and stop water. In addition, the valve seat member moves to compensate for wear of the seal portion, and the seal portion can be brought into close contact with the bottom surface of the valve body.

[0014] The distributing valve of the invention of claim 2 is the invention of claim 1, characterized in that the valve seat member has an O-ring on its outer periphery for sealing between the valve seat member and the inner periphery of the inlet port. According to the above configuration, it is possible to seal off fluid that enters between the inner circumferential surface of the introduction port and the valve seat member, so that the valve seat member is pressed toward the valve body. Effect of the Invention

[0015] According to the distributing valve of the present invention, it is possible to adjust the distribution ratio and the total flow rate of the fluid, and also to suppress leakage when the total flow rate is set to zero. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a diagram showing the configuration of a water heater equipped with a distribution valve. [Diagram 2] FIG. 1 is a perspective view of a dispensing valve according to an embodiment of the present invention. [Diagram 3] FIG. 3 is an exploded view of a main part of the distributing valve of FIG. 2. [Figure 4] 4 is a vertical cross-sectional view of the distributing valve of FIG. 2 taken along line IV-IV. [Diagram 5] FIG. [Figure 6] 3 is a diagram showing an opening of a first outlet of the distributing valve of FIG. 2. FIG. [Figure 7] 3 is a diagram showing the opening of a second outlet of the distributing valve of FIG. 2. FIG. [Figure 8] FIG. 3 is a diagram showing an inlet opening of the distribution valve of FIG. 2. [Figure 9] FIG. 2 is a vertical cross-sectional view of a main portion of a distribution valve in a closed state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the mode for carrying out the present invention will be described based on examples. EXAMPLES

[0018] First, a hot water supply system to which a distributing valve of the present invention is applied will be described. As shown in FIG. 1, the hot water supply device 1 is a combustion-type hot water supply device having a combustion device 2 equipped with a burner, a blower fan, etc., and a heat exchanger 3, and having a heating section that heats clean water in the heat exchanger 3 using the combustion heat generated in the combustion device 2. The hot water supply device 1 has a water supply passage 4 that supplies clean water to the heat exchanger 3, a hot water outlet passage 5 that outputs hot water from the heat exchanger 3, a distribution valve 10 interposed in the water supply passage 4, a bypass passage 6 that branches off from the water supply passage 4 at the distribution valve 10 and is connected to the hot water outlet passage 5, and a control means 7 that controls hot water supply. The distribution valve 10 distributes the clean water supplied to the heat exchanger 3 side and the bypass passage 6 side that bypasses the heating section. The heat exchanger 3 has a latent heat recovery heat exchanger, and the hot water supply device 1 is equipped with a neutralizer 9 that neutralizes and discharges highly acidic drain water formed by condensing moisture contained in the combustion exhaust.

[0019] The hot water outlet passage 5 is equipped with a hot water temperature sensor 8a downstream of the connection with the bypass passage 6. The water supply passage 4 is equipped with a water supply temperature sensor 8b and a water supply flow rate sensor 8c downstream of the distribution valve 10. The control means 7 controls the amount of combustion heat generated by the combustion device 2 and the distribution ratio of the distribution valve 10 based on the temperature detected by the water supply temperature sensor 8b and the flow rate detected by the water supply flow rate sensor 8c so that the temperature detected by the water supply temperature sensor 8a becomes the set hot water temperature. The flow rate (total flow rate) of clean water introduced to the hot water supply device 1 is calculated from the flow rate detected by the water supply flow rate sensor 8c and the distribution ratio of the distribution valve 10.

[0020] The distribution valve 10 is controlled so that the greater the heating capacity required for hot water supply at the hot water supply setting temperature, the more the distribution to the heat exchanger 3. Also, the distribution valve 10 is controlled so that the total flow rate decreases or becomes zero as necessary.

[0021] Next, the distribution valve 10 will be described. As shown in Fig. 2, the distributing valve 10 is equipped with a drive unit 12 (drive means) having, for example, a stepping motor in a valve body 11. Here, the distributing valve 10 is described as being installed in the hot water heater 1 with the drive unit 12 facing upward. Arrows U, F, and L in the figure indicate the upper, front, and left sides of the distributing valve 10, respectively. The position of the distributing valve 10 is appropriately changed depending on the equipment to which it is attached.

[0022] The valve body 11 is formed of, for example, synthetic resin, and has a first outlet 13 and a second outlet 14 on the side and an inlet 15 on the bottom. The drive unit 12 is fixed to a mounting plate 16 on the upper part of the valve body 11 by a plurality of fastening members 17. When the distributing valve 10 is interposed in the water supply passage 4, the inlet 15 and the second outlet 14 are connected to the water supply passage 4, and the first outlet 13 is connected to the bypass passage 6. Clean water indicated by an arrow WI introduced upward into the inlet 15 is distributed into clean water supplied from the first outlet 13 to the bypass passage 6 as indicated by an arrow WO1, and clean water supplied from the second outlet 14 to the heat exchanger 3 as indicated by an arrow WO2.

[0023] As shown in Fig. 3 and Fig. 4, a cylindrical valve body 20 made of, for example, synthetic resin is rotatably inserted into a cylindrical space formed inside the valve body 11. A valve shaft 22, which is concentric with the central axis C of the valve body 20, extends from a top surface portion 21a covering the top surface of the valve body 20 to the outside of the valve body 11. A collar member 30, which rotatably supports the valve shaft 22, is inserted into the valve body 11 together with the valve body 20. The valve body 20 and the collar member 30 are prevented from falling off the valve body 11 by a mounting plate 16 fixed to the valve body 11 by a plurality of fastening members 18. A serration is applied to a part of the valve shaft 22 in order to rotate the valve body 20 via the valve shaft 22 by the drive unit 12 fixed to the mounting plate 16. The internal structure of the drive unit 12 is not shown or described.

[0024] Two O-rings 22a are attached to the valve shaft 22 to provide a watertight seal between the collar member 30 and the valve body 11. An O-ring 30a is attached to the outer periphery of the collar member 30 to provide a watertight seal between the collar member 30 and the valve body 11. An insertion portion 32 of the collar member 30, which is inserted into the mounting plate 16, is formed with a rotation restriction portion 33 that engages with the mounting plate 16 to prevent the collar member 30 from rotating together with the rotation of the valve body 11.

[0025] In the inlet 15, a valve seat member 40 made of synthetic resin is fitted into a communication portion 15a with the inlet 15 at the bottom of the valve body 11. The valve seat member 40 has a cylindrical portion 41 formed in a cylindrical shape, a top surface portion 42, and a seal portion 43 that extends from the top surface portion 42 toward the valve body 20 and seals by abutting against the bottom surface portion 26a of the valve body 20. A groove 44 that surrounds the outer periphery of the seal portion 43 is formed in the top surface portion 42 along the base end portion of the seal portion 43. The seal portion 43 is formed in a cylindrical shape with an opening shape that is approximately fan-shaped, and the inlet 15 and the internal space of the cylindrical valve body 20 can communicate with each other through the inside of the cylindrical seal portion 43 fitted into the communication portion 15a and the inside of the cylindrical portion 41.

[0026] The valve seat member 40 has a flange 45 and a plurality of protrusions 46 on the outer periphery of the cylindrical portion 41. The flange 45 is formed so as to extend radially outward together with the top surface portion 42 and protrude from the outer periphery of the cylindrical portion 41. The plurality of protrusions 46 are formed so as to protrude radially outward from the lower end portion of the cylindrical portion 41 to the same extent as the flange 45. An O-ring 47 is provided on the outer periphery of the cylindrical portion 41 between the flange 45 and the plurality of protrusions 46, sealing the gap with the inner periphery of the inlet 15. The valve seat member 40 attached to the inlet 15 is movable in the axial direction of the valve body 20, and is pressed into the bottom surface portion 26a of the valve body 20 by the force received from the flowing clean water by the flange 45 and the lower surface of the top surface portion 42 so that the seal portion 43 is in close contact with the bottom surface portion 26a of the valve body 20.

[0027] Next, the valve body 20 will be described. 3 and 5, the valve body 20 is formed by fitting a disk-shaped second valve body 26 having a bottom surface 26a into the open end of a first valve body 21 having a cylindrical peripheral wall portion 21b and a top surface portion 21a. A plurality of key grooves 21c are formed on the inner periphery of the peripheral wall portion 21b of the first valve body 21. A plurality of keys 26b corresponding to the plurality of key grooves 21c of the first valve body 21 are formed in the second valve body 26.

[0028] The first valve body 21 and the second valve body 26 are prevented from rotating relative to each other by the key grooves 21c and the corresponding keys 26b, and are positioned in the circumferential direction, so that the first valve body 21 and the second valve body 26 rotate together. The peripheral wall portion 21b slides against the inner peripheral surface surrounding the side of the space formed in a cylindrical shape inside the valve body 11, and functions as a sealing surface portion that closes the first outlet 13 and the second outlet 14 of the valve body 11. The bottom surface portion 26a functions as a sealing surface portion that closes the inlet 15 of the valve body 11.

[0029] The first valve body 21 has a first opening 23 on the upper stage side (top surface 21a side) of the peripheral wall portion 21b for communicating the internal space of the valve body 20 with the first outlet 13. The first valve body 21 has a second opening 24 on the lower stage side (open end side) of the peripheral wall portion 21b for communicating the internal space of the valve body 20 with the second outlet 14. The first opening 23 and the second opening 24 are formed so that their axial opening widths (heights) change when they move in the circumferential direction. In addition, the first valve body 21 has a plurality of reinforcing ribs 21d that reinforce the peripheral wall portion 21b and the top surface portion 21a and protrude into the internal space. These reinforcing ribs 21d suppress radial and axial deformation of the first valve body 21.

[0030] The second valve body 26 has a plurality of third openings 27 for communicating the internal space of the valve body 20 with the inlet 15. The bottom surface portion 26a has an annular outer periphery and a sector-shaped portion connecting the annular outer periphery and its central portion, and occupies about half of the projected area in the axial direction of the valve body 20. In order to suppress deformation (axial displacement) of the bottom surface portion 26a, a plurality of reinforcing ribs 26c are formed radially on the bottom surface portion 26a on the side facing the internal space of the valve body 20, connecting the annular outer periphery and its central portion. The reinforcing ribs 26c are also formed on the third opening 27.

[0031] As shown in Fig. 6, the first outlet 13 communicates with the internal space of the valve body 20 through a communication portion 13a that opens in a semicircular shape with a straight lower end and a first opening 23 of the valve body 20. As shown in Fig. 7, the second outlet 14 communicates with the internal space of the valve body 20 through a communication portion 14a that opens in a semicircular shape with a straight upper end and a second opening 24 of the valve body 20. As shown in Fig. 8, the introduction port 15 to which the valve seat member 40 is attached communicates with the internal space of the valve body 20 through the inside of the cylindrical portion 41 of the valve seat member 40, the inside of the sector shape of the seal portion 43, and the third opening 27 of the valve body 20.

[0032] By rotating the valve body 20, the opening area of ​​the first opening 23 communicating with the first outlet 13, the opening area of ​​the second opening 24 communicating with the second outlet 14, and the opening area of ​​the third opening 27 communicating with the inlet 15 change continuously within a predetermined range that has been set in advance. Here, the initial state of the valve body 20 with a rotation angle of 0 degrees is defined as a state in which the opening area of ​​the first outlet 13 is maximum as shown in Fig. 6, the opening area of ​​the second outlet 14 is minimum as shown in Fig. 7, and the opening area of ​​the inlet 15 is approximately maximum as shown in Fig. 8. The predetermined ranges are from maximum to zero (closed) for the first outlet 13 and the inlet 15, and from minimum to maximum (not zero) for the second outlet 14, but can be set appropriately.

[0033] When the valve body 20 is rotated rightward (clockwise as viewed from above) from the initial state, the opening area of ​​the first outlet 13 decreases and the opening area of ​​the second outlet 14 increases, but the opening area of ​​the inlet 15 is maintained at a maximum. When rotated further, the opening area of ​​the inlet 15 starts to decrease, then the first outlet 13 is closed, and the opening area of ​​the second outlet 14 becomes maximum. Finally, when rotated 260 degrees rightward from the initial state, for example, the first outlet 13 is closed, the opening area of ​​the second outlet is maintained at a maximum, and the inlet 15 is closed.

[0034] In the initial state, the clean water introduced from the inlet 13 is distributed to the second outlet 14 on the heat exchanger 3 side at a minimum, with the majority being distributed to the first outlet 13 on the bypass passage 6 side. The pressure of the flowing clean water, i.e., the supply pressure of the clean water, moves the valve seat member 40 so that the seal portion 43 of the valve seat member 40 comes into close contact with the bottom surface portion 26a of the valve body 20. When the valve body 20 is rotated clockwise, the clean water distributed to the first outlet 13 decreases and the clean water distributed to the second outlet 14 increases. In normal hot water supply by the hot water supply device 1, the distribution ratio is adjusted by rotating the valve body 20 in a region where an increase in one of the first outlet 13 and the second outlet 14 decreases the other.

[0035] When the heating capacity tends to be insufficient, such as when supplying high-temperature hot water, the valve body 20 is rotated further to reduce the clean water distributed to the first outlet 13 to zero, and all of the clean water introduced from the inlet 13 is supplied to the second outlet 14. When the heating capacity is insufficient because the overall flow rate is large, the valve body 20 is rotated further to reduce the opening area of ​​the inlet 15, thereby restricting the introduction of clean water and reducing the overall flow rate.

[0036] When the hot water supply device 1 is one of the hot water supply devices constituting the linked hot water supply system and corresponds to a hot water supply device that is not operated, the valve body 20 is rotated to close the inlet 15 to make the total flow rate zero. At this time, as shown in FIG. 9, the valve seat member 40 is pressed by the supply pressure of clean water supplied to the inlet 15 as shown by the arrow WI, and the seal portion 43 and the bottom surface portion 26a of the valve body 20 are kept in close contact with each other, preventing the clean water from flowing into the valve body 11. Leakage from the outer periphery of the valve seat member 40 is suppressed by the O-ring 47. Therefore, the distributing valve 10 has a function of adjusting the total flow rate and a blocking function of making the total flow rate zero in addition to the function of distributing the fluid, so that a flow rate adjustment valve that is usually equipped and a stop valve that is usually equipped for a linked hot water supply system can be omitted.

[0037] The operation and effects of the above-mentioned distributing valve 10 will now be described. The distributor valve 10 distributes the fluid flowing into the valve body 20 from the inlet 15 to the first outlet 13 and the second outlet 14. The distributor valve 10 includes a cylindrical valve body 20 rotatably fitted into the valve body 11, and a drive unit 12 (drive means) for rotating the valve body 20. The valve body 20 has a peripheral wall portion 21b that functions as a seal surface portion for closing the first outlet 13 and the second outlet 14, and a bottom surface portion 26a that functions as a seal surface portion for closing the inlet 15. The peripheral wall portion 21b is formed with a first opening 23 and a second opening 24 that continuously change the opening area of ​​the first outlet 13 and the opening area of ​​the second outlet 14 by the rotation of the valve body 20. The bottom surface portion 26a is formed with a third opening 27 that changes the opening area of ​​the inlet 15 within a predetermined range by the rotation of the valve body 20.

[0038] A valve seat member 40 having a seal portion 43 that seals by contacting the bottom surface portion 26a of the valve body 20 is disposed in the inlet 15. The valve seat member 40 is movable in the axial direction of the valve body 20, and is pressed by the supply pressure of the fluid so that the seal portion 43 comes into close contact with the bottom surface portion 26a of the valve body 20. Therefore, when the valve body 20 is rotated to close the inlet 15, the seal portion 43 of the valve seat member 40 comes into close contact with the bottom surface portion 26a of the valve body 20 to prevent leakage and stop water. Even if the seal portion 43 is worn, for example, due to the rotation of the valve body 20, the valve seat member 40 can move toward the valve body 20 to bring the seal portion 43 into close contact with the bottom surface portion 26a of the valve body 20, and the closing function can be maintained.

[0039] The valve seat member 40 has an O-ring 47 on its outer periphery that seals between it and the inner periphery of the inlet 15. Therefore, it is possible to seal against fluid that enters between the inner periphery of the inlet 15 and the valve seat member 40, and to press the valve seat member 40 toward the valve body 20.

[0040] The distribution valve 10 may be applied to devices other than the hot water supply device 1, and may be used to distribute fluids other than drinking water. In addition, a person skilled in the art may implement the present invention in a form in which various modifications are added to the above embodiment without departing from the spirit of the present invention, and the present invention includes such modifications. [Explanation of symbols]

[0041] 1: Hot water supply equipment 3: Heat exchanger 4:Water supply passage 5: Hot water passage 6: Bypass passage 7: Control means 10: Distribution valve 11: Valve body 12: Drive unit (drive means) 13: 1st outlet 14:Second outlet 15: Entrance 16: Mounting plate 20: Valve body 21: First valve body 21a: Top section 21b: Peripheral wall part 22: Valve stem 23: First opening 24: Second opening 26: Second valve body 26a: Bottom part 27: Third opening 30: Colored parts 40: Valve seat material 41: Cylindrical part 42:Top section 43: Seal part 44: Groove 45: Flange 46: Protrusion 47: O-ring

Claims

1. a valve body having a first outlet, a second outlet, and an inlet, a cylindrical valve element rotatably fitted into the valve body, and a drive means for rotating the valve element, wherein the valve element has a peripheral wall portion functioning as a sealing surface portion for closing the first outlet and the second outlet, and a bottom surface portion functioning as a sealing surface portion for closing the inlet, the peripheral wall portion is formed with a first opening and a second opening which continuously change an opening area of ​​the first outlet and an opening area of ​​the second outlet as the valve element rotates, and the bottom surface portion is formed with a third opening which changes an opening area of ​​the inlet within a predetermined range as the valve element rotates, a valve seat member having a seal portion that seals by contacting the bottom surface portion is disposed at the inlet; the valve seat member is movable in the axial direction of the valve body, and is configured so that the valve seat member is pressed toward the valve body by the supply pressure of fluid acting on the inlet, causing the seal portion to come into close contact with the bottom surface portion.

2. 2. The distributor valve according to claim 1, wherein the valve seat member has an O-ring on its outer periphery for sealing against the inner periphery of the inlet port.

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