JPS62177386A - Fluid control valve - Google Patents

Abstract

PURPOSE:To exhibit a water stop function and a water level control function by providing the first and second pilot valves on a back chamber of a diaphragm valve,and controlling the diaphragm valve. CONSTITUTION:A diaphragm valve 105 of a fluid control valve A has the first and second back chambers 109, 110, and the first and second pilot valves 117, 123 are provided on a partition wall 106. On detecting a designated water level, the second pilot valve hole 115 is closed, and a main valve hole 103 is closed. When no electric current is supplied to an electromagnetic coil 118, the first pilot valve hole 114 is closed, so that the main valve hole 103 is closed. When electric current is supplied to the electromagnetic coil 118, the first pilot valve hole 114 is opened, and the main valve hole 103 is opened. Accordingly, both a water stop function and a water level control function can be obtained.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention is a fluid control valve that has two functions.

For example, hot water from a heat exchanger for hot water supply is supplied to the circulation system of a heat exchanger for reheating through an electromagnetic hot water supply valve with a water stop function and a separation tank that has a built-in pole tap with a water level control function. The present invention relates to an integrated fluid control valve that has both the water shutoff function using the pilot type electromagnetic valve and the water level control function using the pole tap in the bathtub with automatic hot water supply.

C. Prior Art] The prior art will be explained with reference to FIGS. 4 and 5, taking the bathtub with automatic hot water supply as an example.

Figure 11 shows the circulation system of the heat exchanger for reheating, through which hot water from the heat exchanger for hot water supply is passed through a pilot type solenoid valve with a water stop function and a separation tank with a built-in pole tap that has a water level control function. It is a water system diagram of a bathtub with automatic hot water supply that supplies hot water to the street.

In the figure, reference numeral 1 denotes a container body, which houses a hot water supply heat exchanger 2 and a reheating heat exchanger 3.
A water supply pipe 4 is installed on the inlet side via a water flow counter 5 and a water supply solenoid valve 6, and a hot water supply pipe 7 is installed on the outlet side. Bathroom other than 2
A hot water supply pipe is connected to a hot water supply faucet 8 installed in the kitchen, washroom, etc., and the other end is connected to a hot water supply pipe II leading to a separation tank 10 via a hot water supply solenoid valve 9 inside the container 1, and the other end is connected to a hot water supply pipe II leading to a separation tank 10. has a pole tap 12 and an overflow pipe 13, and communicates the separation tank 10 with a return pipe 16 of a reheating circulation system, which will be described later, through a pouring pipe 14. In addition, the heat exchanger 3 for reheating has a forced circulation pump I7 on its inlet side.
The outlet pipe 15 is connected to the bathtub 18 through an outgoing pipe 15, and the outlet side is connected to the bathtub 18 via a return pipe 16. In the above description, the separation tank 10 is required to separate the hot water supply pipe 11 from the reheating circulation system and to compensate for the drop in water level in the bathtub during reheating.

A specific example of the separation tank is shown in FIG. That is, the separation tank 10 has a connection tube 1 connected to the hot water supply pipe 11.
9 is fixed, a valve hole 20 is formed downward in the connecting cylinder 19, and a valve body 21 is disposed below the valve hole 20, and one end of the valve body is pivotally supported by a pin 22, and the other end is supported by a pin 22. The valve hole 20 is opened and closed by moving up and down a float arm 24 having a float 23 in pressure contact with or against the valve hole 20.

[Problem that the invention seeks to solve]

In the conventional device as described above, when the water level in the separation tank 10 rises, the valve body 2 is released via the float arm 24.
1 and closes the valve hole 20 to stop the water at a certain water level.
Because 0 must be occluded.

A large force is required to push up the valve body 21, and therefore,
The size of the float arm 24 must be increased or the diameter of the float 23 must be increased, which makes the single separation tank 10 larger than necessary. At the same time, since the separation tank IO (5) and the electromagnetic hot water supply valve 9 are completely separate, piping is required between them, and this, combined with the increase in the size of the separation tank, poses a major constraint on downsizing of bathtubs with automatic hot water supply. Is receiving.

The present invention improves the problems of the prior art as described above, and provides, for example, an integrated fluid control valve having a water stop function and a water level control function. The purpose is to make the body smaller.

Although the present invention is directly applied to the integration of the separation tank and the hot water supply solenoid valve of the bathtub with automatic hot water supply, the present invention is not limited to this embodiment, and at least It can be applied to various uses as a dε body control valve having two functions.

[Means for solving problems]

In order to achieve the above object, the present invention is equipped with a diaphragm valve that opens and closes a main valve hole formed between a fluid inlet and an outlet, and the diaphragm valve is operated by a spring disposed in its back chamber. In a fluid control valve configured to close a main valve hole under normal conditions, the back chamber of the diaphragm is divided into a first back chamber and a second back chamber by a partition wall, and the diaphragm has a fluid inlet and a second back chamber. A communication passage that communicates with the first back chamber is provided, and a communication passage that communicates the first back chamber with the second back chamber is provided in the farm wall, and further, one end of the communication path communicates with the second back chamber. A pilot passage is formed having two pilot valve holes, a first and a second, which are open to the atmosphere and the other end is opened to the atmosphere, and the first and second pilot valve holes are connected to the first and second pylons 1, respectively. ~Constructed to be opened and closed by a valve, and when the first pilot valve hole is closed, the fluid inlet and the first and second back chambers become equal pressure, the diaphragm valve is closed, and the first and second back chambers are closed. When the pilot valve hole is opened, the pressure in the first and second back chambers becomes lower than the fluid inlet, opening the diaphragm valve. When the second pilot valve hole is closed in this state, the fluid inlet and the first and second back chambers are closed. The feature is that the back chamber has equal pressure and the diaphragm valve is closed.

[For production]

Since the fluid control valve of the present invention has the above-described configuration,
When the first pilot valve hole is closed, fluid fills the first back chamber and the second back chamber from the inlet through the communication hole of the diaphragm valve and the communication hole of the diaphragm wall, and flows into the first and second back chambers. The pressure at the inlet becomes equal.

As a result, the diaphragm valve closes the main valve hole with a spring, and even if the spring force is small, the valve can be completely closed. In this state, when the first pilot valve hole and the second pilot valve hole are opened, The pressure in the first and second back chambers becomes equal to the atmospheric pressure through the pilot passage, and the pressure becomes lower than the inlet side, which opens the diaphragm valve against the spring and allows the fluid to flow from the inlet side to the outlet side. Then, when the second pilot valve hole is closed while the first pilot valve hole remains open, fluid flows into the first back chamber and the second back chamber, and the fluid flows between the inlet side and the first back chamber. The pressures in the second and second back chambers become equal and the diaphragm valve is closed, and at this time, the force required to close the second pilot valve is extremely small.

That is, the present invention has two functions: one by opening and closing the first pilot valve hole, and the other by opening and closing the second pilot valve hole.
A fluid control valve having two functions can be obtained.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. This embodiment is an example in which the present invention is applied to a separation tank that incorporates a pilot-operated solenoid valve with a water stop function and a pole tap with a water level control function.

In FIGS. 1 to 3, 10 indicates a separation tank, and a fluid control valve A of the present invention is fixed to a lid 25 fixed to the separation tank.

The fluid control valve A includes a first valve casing 104 having a fluid inlet 101 and an outlet 102 with a main valve hole 103 formed therebetween, and a diaphragm valve 105 together with the first valve casing.
A second plate sandwiching the periphery of and having a partition wall 106 in the middle.
Valve casing 107 and lid 10 that seals the back of the second valve casing
8, a diaphragm valve 105 and a partition wall 106.
A first back chamber 109 and a second back chamber 110 are formed between the cutting wall 106 and the lid 108, respectively.

Further, a compression spring 111 is interposed between the above-mentioned farm wall 106 and the diaphragm valve 105, so that when the pressures on the inlet side 101 and the first back chamber 109 are equal, the spring [
1, the diaphragm valve 105 is pressed against the main valve hole 103 to close the main valve hole, and when the pressure in the first back chamber 109 is lower than the pressure on the inlet side 101, the diaphragm valve 105 is pushed against the spring 111 and the main valve hole is closed. 103.

The diaphragm valve 105 also has an inlet side 101.
A communication hole 112 is formed to constantly communicate between the first back chamber 109 and the first back chamber 109.
A communication hole 113 is formed to constantly communicate with the back chamber 110. Further, the farm wall 106 has a first pilot valve hole 114 and a second pilot valve hole 115, one end of which opens into the second back chamber 110 and the other end of which opens into the atmosphere, for example, into a separation tank. A pilot passage 116 having a
Electromagnetic pilot valves 117, which are pilot 1 valves, are arranged opposite to each other, and when the electromagnetic coil 118 is not energized, the first pilot valve hole 114 is closed by a spring 119, and when the electromagnetic coil 118 is energized, the first pilot valve hole 114 is closed. The pilot valve hole 114 is opened. In addition, the first valve housing 104
The second valve casing 107 is integrally connected to the fixing screw 120 with the diaphragm valve 105 in between, and the fluid outlet 102 below, the second pilot valve body mounting cylinder 121, and the float arm pivot 122. is inserted into the separation tank lo through the lid 25, and in this state, the valve casings 104 and 107 are fixed to the lid 25 with the mounting screws 123.

Also, a float arm 2 with a float 23 attached to one end
4 is pivotally supported on the pivot portion 122 by a pin 22, and a part of the flow art t1 is supported through the notch of the mounting tube 121. The pilot valve body 123 is supported by a part of the flow 1 hair arm 24, and under normal conditions, the second pilot valve body 123 is located below the second pilot valve hole 115 and opens the second pilot valve hole 115. but,
When the water level in the separation tank 1o rises and reaches a predetermined level, the float arm 24 pushes up the second pilot valve body 123 and closes the second pilot valve hole 115.

Since the fluid control valve of the present invention is configured as described above, when the electromagnetic coil 118 is not energized,
Since the electromagnetic pylon 1 to the valve 117 close the first pilot valve hole 114 by the spring 119, the inlet 101
The fluid that has entered through the communication holes 112 and 113 fills the first back chambers 109 and 110, and then enters the inlet 101 and the first back chamber 109.
are at equal pressure, and therefore the spring 11 presses the diaphragm valve 105 to close the main valve hole 103.

Next, the electromagnetic coil 118 is energized, and the electromagnetic pilot valve 1
17 to open the first pilot 1-valve hole 114, the fluid in the first back chamber 109 flows through the communication hole 113. as it flows out into the separation tank via the pilot passage 116.

The pressure in the first back chamber 109 is lower than the pressure in the inlet 101, so the diamond wall 1 resists the spring 111.
1 valve 105 is pushed to open the main valve hole 103 (see Figure 2).

Therefore, the fluid exits from the inlet 101 and reaches the tank 102, as shown in FIG. 2, and is supplied into the separation tank 10.

In this way, fluid is supplied into the separation tank 10, and when the float 23 rises due to the rising water level, the second pilot valve body 123 is gradually pushed up by the float arm 24, and when the water level reaches the set level, the third As shown in the figure, the second pilot valve body 123 is pressed against the second pilot valve hole 115 to open the second pilot valve hole 115.
Close. Then, even if the first pilot valve hole 114 remains open, the second back chamber 110 and the first back chamber 109 are filled with fluid flowing in through the communication holes 112 and 113, and the pressure in the first back chamber 109 is reduced. and the pressure at the inlet 101 become equal, which causes the diaphragm valve 105 to
1 is pressed against the main valve hole to close the main valve hole 103. And the second pilot valve hole 11 in this case
The force that closes the valve 5 is not opposed to the fluid pressure, but only closes the small pilot valve 1-valve hole, so it does not require a large force as in the conventional case, and can be used with small floats and short float arms. is sufficient.

In addition, in the above embodiment, in order to apply the present invention to a separation tank, a second pilot valve element that opens and closes by the vertical movement of the float is used, but the present invention is not limited to such an embodiment. For example, the second
The pilot valve body can also be electromagnetically opened and closed for other uses.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to obtain a compact integrated fluid control valve having a plurality of different functions, such as a water stop function and a water level control function.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an example of the embodiment of the present invention in a normal state, FIG. 2 is a cross-sectional view of the first pilot valve hole opened and the main valve hole opened, and FIG. 〜A cross-sectional view of a state in which the valve hole is open but the second pilot valve hole is closed and the main valve hole is closed.The fourth is a water system diagram of a bathtub with automatic hot water supply, which is an application example of the present invention. FIG. 5 is a cross-sectional view of the conventional separation tank used in FIG. 101...Fluid inlet, 102...Fluid outlet, 103...
・Main valve hole, 105...Diaphragm valve, 106...
Wall, 109...first back chamber, 110...second back chamber, 1
11...Spring, 112.113...Communication hole, 1
14...First pilot valve hole, 115...Second pilot valve hole, 116...Pilot passage, 117...
・First pilot valve body, 118... Electromagnetic coil for first pilot valve body, 123... Second pilot valve body, 2
3... Float for controlling opening/closing of the second pilot valve body, 2
4...Same float arm. Patent applicant Gaster Co., Ltd. Patent attorney Tadashi Akimoto Figure 4 Figure 5

Claims (1)

[Claims] 1. Equipped with a diaphragm valve that opens and closes a main valve hole formed between a fluid inlet and an outlet, and the diaphragm valve is designed to normally close the main valve hole by a spring disposed in its back chamber. In the fluid control valve, the back chamber of the diaphragm is divided into a first back chamber and a second back chamber by a wall, and the diaphragm is provided with a communication passage that communicates the fluid inlet with the first back chamber. In addition, a communication passage is provided in the farm wall to communicate the first back chamber and the second back chamber, and further, in the farm wall, one end is open to the second back chamber and the other end is open to the atmosphere side. a pilot passage having two pilot valve holes, a first and a second, configured to open and close the first and second pilot valve holes, respectively, by first and second pilot valves; When the pilot valve hole is closed, the fluid inlet and the first and second back chambers become equal pressure, closing the diaphragm valve, and when the first and second pilot valve holes are opened, the first and second back chambers are closed. becomes lower pressure than the fluid inlet, opening the diaphragm valve, and in this state, when the second pilot valve hole is closed, the fluid inlet and the first and second back chambers become equal pressure, closing the diaphragm valve. A fluid control valve characterized in that: