JPS61168748A - Water feed device - Google Patents

Abstract

PURPOSE:To facilitate the maintenance such as repair by providing one end of a pipe extending from the hot water reservoir tank with a diaphragm, the other end of said pipe extending through the set water level downwards from above, so as to control the operation of the feed water valve by means of the movement of the diaphragm. CONSTITUTION:A diaphragm 2 is disposed at one end of a pipe, and the other end of the pipe 1 is open to the hot water reservoir tank 3 at a level lower than the set water level 4 by the hight H. Under such a condition, the diaphragm 2 is subjected to the pressure equivalent to the water head H via the air in the pipe 1, and the valve 6 and valve seat 7 are closed to interrupt the feed water. When hot water is discharged from the hot water delivery pipe 11, the water level gets lowered, and the other end 5 of the pipe 1 is communicated to the atmosphere. Then, the diaphragm 2 connected to one end of the pipe 1 is relieved of the pressure to cause the valve 6 and valve seat 7 to open to start feeding water. After the delivery of hot water is completed, when the water is fed to bring the water level up to the set water level 4, the valve 6 and valve seat 7 are closed to complete feeding water.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water supply device such as a hot water storage tank open to the atmosphere such as a solar water heater, a water heater utilizing waste heat, or an oil water heater, or a cistern.

Conventional technology As shown in FIG. 3, conventionally, a pole tap 21 was used as a water supply device for a cistern or open-to-atmosphere hot water tank 22. These pole taps 21 were installed inside the cistern or hot water tank 22. The water surface was controlled by opening and closing valves using the buoyancy of the float 23 floating on the water surface.

Problems to be Solved by the Invention However, since hot water tanks and cisterns 22 using such pole taps 21 are installed at high places to increase the discharge pressure, the pole taps 21 may cause malfunctions such as water stoppage failure. At that time, repair work was extremely inconvenient.

The present invention solves these conventional problems, and has been invented so that the water surface detection unit and the mechanism for opening and closing the water supply can be installed at any location outside the hot water tank or cistern. The water supply device of the present invention is equipped with a diaphragm on one side of the pipe that is connected to the outside of the hot water storage tank or cistern, and the other end of the pipe is guided into the hot water storage tank and is connected to the set water level of the hot water storage tank or cistern. Penetrating the set water surface from top to bottom and opening into the water, and providing a valve and a valve seat in the middle of the water supply pipe connected to the cistern or the hot water storage tank,
The diaphragm and the valve are connected, and the valve is operated by the movement of the diaphragm.

Function: In the water supply device of the present invention, when the water level of the hot water storage tank is lower than the set water level, the opening of the pipe is above the water level and communicates with the atmosphere, and the diaphragm provided on one side of the pipe is not pressurized. As a result, the space between the valve and the valve seat becomes "open" and water is supplied from the water supply pipe. When water continues to be supplied and the water level reaches the set water level, the opening of the pipe becomes below the water surface, and the air within the pipe receives buoyancy and becomes pressurized. This pressure pressurizes a diaphragm provided at one end of the pipe, and the space between the valve and the valve seat is "closed" and water supply is stopped. By repeating the above operations, the water surface is controlled to be constant.

EXAMPLE Hereinafter, a water supply device according to an example of the present invention will be described with reference to the drawings. In FIG. 1, a diaphragm 2 is provided on one side of a pipe 1, and the other end 5 of the pipe 1 is open at a distance H below a set water level 4 of a hot water storage tank 3. In this state, the diaphragm 2 receives a head pressure corresponding to H through the air in the pipe 1, the valve 6 and the valve seat 7 are closed, and water supply is stopped.

Figure 2 shows the hot water discharge state. When hot water is discharged from the discharge pipe 11, the water level falls, the other end 5 of the pipe 1 is communicated with the atmosphere, the diaphragm 2 connected to one end of the pipe 1 is released from pressure, and the valve 6 and valve seat 7 are opened to supply water. will be started. After the water is drained, as shown in FIG. 1, when the water level reaches the set water level 4, the space between the valve 6 and the valve seat 7 is closed and the water supply is completed.

Effects of the Invention The present invention is a water supply device for a cistern, storage, or hot water tank that allows the water surface detection unit and the mechanism for opening and closing the water supply to be installed at any position outside the hot water storage tank or cistern. Generally, hot water tanks and cisterns that are open to the atmosphere are installed in high places, but in the present invention, the water supply device can be installed in any low position, making maintenance very easy. Furthermore, the water supply device is easily deteriorated due to the high temperature inside the hot water storage tank, but in the present invention, the water supply device can be installed at a low temperature location.

[Brief explanation of the drawing]

Figure 1 is a system diagram of a hot water tank equipped with the water supply device of the present invention, Figure 2 is a system diagram showing the water supply status shown in Figure 1, and Figure 3 is a system diagram of a hot water tank using a conventional pole tap. . 1...Pipe, 2...Diaphragm,
3. River... Hot water tank, 4... Setting water level, 5...
...Other end, 6...dan/ben, 7...benza. Name of agent: Patent attorney Toshio Nakao and one other person f.
・Ha 6 If 1 4...Loss - Water running surface 5...Other end l, No 1a If.

Claims (1)

[Claims] A diaphragm is provided on one side of the pipe, and the other end of the pipe penetrates the set water level of the air-open cistern or the air-open hot water storage tank from above to the bottom and is opened into the water. A water supply device in which a valve and a valve seat are provided in the middle of a water supply pipe connected to a water supply pipe, and the diaphragm and the valve are connected.