JP2633811B2 - Mixing valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing valve which mixes two kinds of fluids (for example, two kinds of liquids of water and hot water having different temperatures) in a desired ratio and discharges them.

[0002]

2. Description of the Related Art Conventionally, as a technique for mixing water and hot water at an appropriate temperature and supplying them to a bathtub, a water supply pipe and a hot water supply pipe branched and connected to a bath tapping pipe are provided. 2. Description of the Related Art There is known an apparatus that sets an inflow ratio of water and hot water by two flow control valves attached to a supply pipe and mixes the hot water temperature suitable for bathing.

[0003]

In the conventional mixing apparatus, two flow control valves are required and the price is high, and when the temperature of hot water is changed according to a bather's preference, the flow rate of the water supply pipe is increased. The control valve and the flow rate control valve of the hot water supply pipe must be separately operated, and there is a problem that the operation is troublesome.

[0004] The present invention has been devised in view of the above-mentioned circumstances, and has a purpose of mixing two types of fluids (for example, water and hot water) at a desired ratio and discharging the same while using a single valve. It is also possible to easily change the mixing ratio of the fluids only by changing the rotation angle of the ball valve, or to shut off one of the two fluids and let the other fluid flow out. Another object of the present invention is to provide a highly usable mixing valve having a novel structure.

[0005]

In order to achieve the above object, a mixing valve according to the first aspect of the present invention comprises first and second inlets which open on the same axis on both sides of a valve chamber. , 4 and one outlet 5 opening to the valve chamber 2 at a position displaced with respect to the inlet, and a valve chamber opening of the first inlet 3 and the second inlet 4. A valve body 1 provided with a valve seat portion, and a valve hole 20 through which the first inflow port 3 and the second inflow port 4 communicate and open into the valve chamber 2 and through which fluid can flow. A ball valve 15 rotatably supported by a valve seat portion, and rotating the ball valve in a direction in which the valve hole 20 is displaced with respect to the first inlet 3 and the second inlet 4. A valve shaft 17, and a through hole 18 eccentric to a valve hole 20 of the ball valve 15 in a ball rotating direction.
And a branch communication hole 19 communicating with the eccentric through-hole and opening to the valve chamber 2.

Further, the mixing valve according to the second aspect communicates with the first inlet 3 and the second inlet 4 by the valve chamber 2.
The valve hole 20 of the ball valve 15 opening inside is constituted by first and second refraction valve holes 24 and 25 which are eccentric in the ball rotation direction and are partitioned by a partition 23.

[0007]

In the mixing valve having the above structure, the valve hole 20 of the ball valve 15 communicates with the first inlet 3 and the second inlet 4 with the same opening area as shown in FIGS. When the valve is opened in the same-level communication, two kinds of fluids flowing from the first and second inlets 3 and 4 can be mixed at the same inflow ratio and flow out from the outlet 5. Fifteen
3A, the valve hole 20 is brought into an open state of displacement communication in which the first hole 3 and the second hole 4 communicate with different opening areas as shown in FIG. The two types of fluids flowing from the first and second inlets 3 and 4 can be mixed at different inflow ratios and flow out from the outlet 5.

Further, by changing the rotation angle of the ball valve 15, the valve hole 20 communicates with the first inlet 3 and the second inlet 4 is closed by the ball valve 15 (FIG. 3B). ) And FIG.
When the one valve is opened and the other valve is closed as described above, the fluid inflow from the second inflow port 4 can be interrupted, and only one fluid flowing in from the first inflow port 3 can be discharged. By reversing the rotation direction of the valve 15, the valve hole 20 is
3 (C) and FIG. 9 in which the first inlet 3 is closed by the ball valve 15, the first inlet 3 is closed. Can be blocked, and only the other fluid flowing in from the second inlet 4 can be discharged.

[0009]

1 to 4 show a first embodiment of the present invention.
It will be described according to the following. In the drawing, reference numeral 1 denotes first and second inlets 3 and 4 which open on the same axis on both sides of a valve chamber 2 and the inlets 3 and 4.
1 opening to the valve chamber 2 at a lower position displaced with respect to 4
A metal (for example, brass) valve body having a three-way port composed of two outflow ports 5, having a second inflow port 4 and an outflow port 5, and having a valve shaft fitting insertion port 6 provided above the valve chamber 2. The valve housing 7 provided and the first
A valve holder 8 having an inflow port 3 of the valve case 7 and screwed into a valve chamber opening 2a (see FIG. 2) of the valve housing 7;
The inflow port 3 and the second inflow port 4 are located on a horizontal axis, and the outflow port 5 and the valve shaft fitting port 6 are located on a vertical axis.

The valve openings formed in the first and second inlets 3 and 4 have ring-shaped ball bearing seats 9 and 10 which are fitted into recesses of the outer peripheral portions of the openings. The seat portion is provided as shown in FIGS. For the ball bearing sheets 9 and 10, for example, Teflon is used.

Reference numeral 15 denotes a ball valve made of metal, for example, stainless steel, which is rotatably supported in the valve chamber 2 by the valve seats of the ball bearing seats 9 and 10. The ball valve 15 is a ball top groove. FIG.
The valve shaft 17 has a shaft end engaging portion 17a as shown in FIG.

The ball valve 15 has an eccentric through-hole 18 which is eccentric in the ball rotation direction and communicates with the openings of the first inlet 3 and the second inlet 4 in a half-open state as shown in FIG. ,
There is provided a T-shaped valve hole 20 which communicates with the eccentric through hole 18 and a branch communication hole 19 which opens to the valve chamber 2.

The diameters of the through holes 18 are the first and second.
The eccentricity of the through hole 18 from the ball center (parallel dimension between the center line of the through hole 18 and the ball center line) is set to be the same as the hole diameter of the valve chamber openings of the inflow ports 3 and 4. In this case, the diameter is set to １ ／ of the hole diameter.

The valve shaft 17 is rotatably fitted into the valve shaft fitting opening 6 of the valve body 1 (valve housing 7) by sealing it with an O-ring 21 and is connected to a pulse motor 22 mounted on the valve body 1. Although it is configured to be driven, it is also possible to provide a rotation operation handle (not shown) at the upper end of the valve shaft 17 so as to rotate the ball valve 15. In this case, a scale plate for displaying the rotation angle of the ball valve 15 is attached to the valve body 1.
It is desirable to provide it in the handle rotation part of this.

In the mixing valve configured as described above, for example, a water supply pipe is connected to the first inlet 3, a hot water supply pipe is connected to the second inlet 4, and a bath outlet pipe is connected to the outlet 5. The first inlet 3 and the second inlet 4 are connected to the valve hole 20 of the ball valve 15 (the eccentric through hole 18).
1B, the water flowing in from the first inlets 3 and 4 and the hot water flowing in from the second inlet 4 are made to be in a half-open valve state of the same opening communicating with the same opening area as shown in FIG. They can be mixed with the same inflow ratio (50% water, 50% hot water) and flow out from the outlet 5.

Further, by changing the rotation angle of the ball valve 15, the valve hole 20 (the eccentric through hole 18) of the ball valve is moved to the first position.
3A, the first and second inflow ports 3 and 4 flow into the first and second inflow ports 3 and 4, respectively. Water and hot water can be mixed at different inflow ratios and flow out from the outlet 5.

Further, by changing the rotation angle of the ball valve 15, the valve hole 20 (eccentric through hole 18) of the ball valve 15 communicates with the first inlet 3, and the second inlet 4 connects the ball Valve 1
If the one-way valve opening and the other-way valve closing state as shown in FIG. 3 (B) are closed at 5, the inflow of hot water from the second inlet 4 is cut off and only the water flowing from the first inlet 3 flows. The ball valve 15 can be discharged from the outlet 5 and the direction of rotation of the ball valve 15 is reversed so that the valve hole 20 (the eccentric through hole 18) of the ball valve communicates with the second inflow port 4 and the first inflow port 4 Inflow port 3 is ball valve 1
3 (C), the flow of water from the first inlet 3 is cut off, and only the hot water flowing from the second inlet 4 flows. It can also be discharged from the outlet 5.

When the ball valve 15 can make one rotation, the ball valve 20 (eccentric through hole 18) is perpendicular to the central axis of the first inlet 3 and the second inlet 4. By rotating 15, both the first and second inflow ports 3, 4 can be closed to bring them into a fully closed state as shown in FIG. 4.

FIGS. 5 to 9 show a second embodiment of the present invention. The mixing valve of the second embodiment is such that the valve hole 20 of the ball valve 15 is constituted by first and second refraction valve holes 24 and 25 which are eccentric in the ball rotation direction and are partitioned by a partition 23. The first refraction valve hole 24 and the second refraction valve hole 25 are eccentric in the ball rotation direction and communicate with the openings of the first inlet 3 and the second inlet 4 in a half-open state as shown in FIG. The first embodiment differs from the first embodiment in that it is formed as a reverse L-shaped hole as shown in FIGS. 5 and 7 which is composed of a horizontal hole and a vertical hole communicating with the eccentric horizontal hole and opening to the valve chamber 2. Are different. The other configuration is the same as that of the first embodiment, so that the same components are denoted by the same reference numerals and detailed description of the configuration is omitted.

In the mixing valve of the second embodiment, for example, a water supply pipe is connected to the first inlet 3, a hot water supply pipe is connected to the second inlet 4, and a bath outlet pipe is connected to the outlet 5. The first refraction valve hole 24 and the second refraction valve hole 25 of the ball valve 15 are provided with the same opening area as shown in FIG. 6 for the first inlet 3 and the second inlet 4. If the same open communication valve is opened in a half-open state, the water flowing in from the first inlets 3 and 4 and the hot water flowing in from the second inlet 4 have the same inflow ratio (50% water, 50% hot water). It can be mixed and discharged from the outlet 5.

Further, by changing the rotation angle of the ball valve 15, the first refraction valve hole 24 and the second refraction valve hole 25 of the ball valve are connected to the first inlet 3 and the second inlet 4, respectively. If the valve is in the open state (similar to the state shown in FIG. 3B) in which the displacement communication communicates with different opening areas, the water and hot water flowing from the first and second inlets 3 and 4 are mixed at different inflow ratios. It can be discharged from the outlet 5.

When mixing water and hot water as described above, the partition 23 receives the pressure (water pressure) of the water flowing from the first inlet 3 and changes the flow direction of the water to the outlet 5.
In the direction of. When the ball valve 23 having such a function is provided in the ball valve 15, even if there is a large difference between the supply pressure of water and the supply pressure of hot water, the low-pressure hot water is pushed back by the high-pressure water. This eliminates the problem of backflow (mixing is impossible).

Further, by changing the rotation angle of the ball valve 15, the first refraction valve hole 24 of the ball valve 15 communicates with the first inlet 3, and the second inlet 4 is connected to the ball valve 15. When the valve is closed and closed as shown in FIG. 8, the inflow of hot water from the second inlet 4 is blocked, and only the water flowing from the first inlet 3 flows out of the outlet 5. Also, by reversing the rotation direction of the ball valve 15, the second refraction valve hole 25 of the ball valve 15 communicates with the second inlet 4, and the first inlet 3 is connected to the ball valve 15. If the valve is closed at one end and opened at the other end as shown in FIG.
Can be shut off, and only the hot water flowing in from the second inlet 4 can flow out from the outlet 5.

When the ball valve 15 can make one rotation by manual operation or the like, the valve hole 20 (the first refraction valve hole 24 and the 2
By rotating the ball valve 15 so that the refraction valve holes 25) are orthogonal to each other, both the first and second inflow ports 3 and 4 are closed, and a fully closed state substantially similar to the state of FIG. It is also possible.

In the above description, an example of use in mixing water and hot water has been described. However, the mixing valve of the present invention is not limited to the above-described usage, and is not limited to the above-described usage. It can also be used as a mixing valve for different gases.

[0026]

As described above, according to the mixing valve of the present invention, two kinds of fluids such as water and hot water can be mixed and discharged at a desired ratio, and the mixing ratio of the fluids can be reduced. It can be easily changed only by changing the rotation angle of the ball valve, or one of the two fluids can be shut off and the other fluid can be discharged.

Further, the valve body and the valve seat portion are provided in a third aspect.
In the case of the configuration specified in (4) and (4), assembling of the entire valve can be easily performed, and reduction in manufacturing cost, smooth operation of the valve, and improvement in quality can be achieved.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional view at the center of a mixing valve according to a first embodiment of the present invention, and FIG. 1B is FIG.
FIG. 3 is a transverse sectional view taken along line XX of FIG.

FIG. 2 is an exploded cross-sectional view of the mixing valve of the first embodiment into a valve housing, a ball valve, and a valve holder.

FIG. 3 is an operation explanatory view of the mixing valve;
FIG. 1A is a cross-sectional view showing an open state of the valve hole displacement communication, FIG. 1B is a cross-sectional view showing a state of one-side opening and the other side closing, and FIG. FIG. 3 is a cross-sectional view showing a state in which the valve is closed and the other valve is opened.

FIG. 4 is a cross-sectional view showing the mixing valve in a fully closed state.

FIG. 5 is a central longitudinal sectional view of a mixing valve according to a second embodiment of the present invention.

FIG. 6 is a transverse sectional view taken along the line YY of FIG. 5;

FIG. 7 is an exploded sectional view showing the mixing valve of the second embodiment into a valve housing, a ball valve, and a valve holder.

FIG. 8 is a cross-sectional view showing the mixing valve of the second embodiment in a state where one side valve is opened and the other side valve is closed.

FIG. 9 is a cross-sectional view showing the mixing valve of the second embodiment in a state where one side valve is closed and the other side valve is opened.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Valve main body, 2 ... Valve chamber, 2a ... Valve chamber opening part, 3 ... First inflow port, 4 ... Second inflow port, 5 ... Outflow port, 6 ... Valve shaft fitting insertion port, 7 ... Valve housing , 8 ... valve holder, 9, 10 ... ball bearing seat, 15 ... ball valve, 16 ... ball top end groove, 17 ... valve shaft, 18 ... eccentric through hole, 19 ... branch communication hole, 20 ... valve hole, 22 ... pulse Motor, 23 ... partition wall, 24 ... first refraction valve hole, 25 ... second refraction valve hole.

Claims (5)

(57) [Claims] 1. A first valve which opens on both sides of a valve chamber on the same axis.
A three-way port comprising a second inlet and one outlet opening to the valve chamber at a position displaced with respect to the inlet, the valve chamber openings of the first inlet and the second inlet; A valve body provided with a valve seat portion, and a valve hole which communicates with the first inlet and the second inlet and is open to the valve chamber and through which fluid can flow. A ball valve that is rotatably disposed and a valve shaft that rotates the ball valve in a direction in which the valve hole is displaced with respect to the first inlet and the second inlet. Wherein the valve hole comprises a through hole eccentric in the ball rotation direction, and a branch communication hole communicating with the eccentric through hole and opening to the valve chamber. 2. A first valve which opens on both sides of a valve chamber on the same axis.
A three-way port comprising a second inlet and one outlet opening to the valve chamber at a position displaced with respect to the inlet, the valve chamber openings of the first inlet and the second inlet; A valve body provided with a valve seat portion, and a valve hole which communicates with the first inlet and the second inlet and is open to the valve chamber and through which fluid can flow. A ball valve that is rotatably disposed and a valve shaft that rotates the ball valve in a direction in which the valve hole is displaced with respect to the first inlet and the second inlet. Wherein the valve hole is formed of first and second refraction valve holes which are eccentric in the ball rotation direction and are defined by partition walls. 3. A valve housing in which the valve main body has a second inlet and an outlet and a valve shaft fitting opening is provided in an upper part of a valve chamber, and a valve in the valve housing having a first inlet. A valve holder screwed into the chamber opening, wherein the first and second inlets are located on a horizontal axis, and the outlet and the valve shaft are located on a vertical axis. The mixing valve according to claim 1 or 2, wherein 4. The valve seat according to claim 3, wherein the valve seat portion is constituted by a ball bearing seat fitted to a valve chamber opening outer peripheral portion of the first inlet and the second inlet. Mixing valve. 5. The mixing valve according to claim 1, wherein the valve shaft is driven by a pulse motor attached to a valve body.