JPS6026350Y2 - Switching valve device for solar water heaters - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a switching valve device that is attached to a solar water heater to supply water, hot water, and stop the supply.

The weak point of solar water heaters, which are rapidly becoming popular, is that during cold seasons, hot water pipes and water supply pipes must be drained to avoid freezing and damage, which causes the hot water in the hot water storage tank to drain. This results in even the most expensive materials being discarded, which severely limits their use.

By using this device in conjunction with a hand-held switching valve device that performs hot water supply and stop-draining, when hot water supply is stopped, the hot water supply port of the hot water storage tank is blocked and water can be drained only from the hot water supply pipe and the water supply pipe. The purpose is to increase the usage efficiency of solar water heaters.

This invention will be explained in detail below based on illustrated embodiments.

1 is the valve body, 2 is the hot water supply port connection port, 3 is the water supply pipe connection port,
4 is a hot water supply pipe connection port.

5 is a passage between the hot water supply port connection port 2 and the hot water supply pipe connection port 4.

A valve 6 is fixed to one side of the valve shaft 7 and opens the passage 5.

The valve shaft 7 is slidably inserted into a boss 9 between the hot water supply pipe connection port and an urging device housing tube 8 provided inside the water supply pipe connection port 3 .

Reference numeral 10 denotes a drive plate, which has a rubber backing 11 for closing the water supply pipe connection port 3 and is fixed to the other end of the valve shaft 7.

Reference numeral 12 denotes a biasing device, which is attached to the valve shaft 7 inside the drive plate 10 and constantly pressurizes the valve shaft toward the water supply pipe connection port 3 side by a spring 13.

In addition, the valve stem 7 has a water supply pipe connection port 3 of the boss 9 when hot water is supplied.
A stepped portion 7' is provided which abuts on the side end surface 9'.

14 is a ball valve device, and the valve body 1 is located above the hot water pipe connection port 4.
established in

Reference numeral 15 denotes a ball valve, which is positioned above the lower vent hole 16 due to its own weight when hot water supply is stopped, and closes the upper vent hole 17 by water pressure when hot water is supplied.

As shown in FIG. 4, the above-mentioned switching valve device is installed by connecting the hot water supply port connection port 2 to the hot water supply port 19 of the hot water storage tank 18 of the solar water heater, and the water storage tank 20 is connected to the water supply pipe connection port 3.
A water supply pipe 21 to be connected to is connected via a T-joint.

Further, a hot water supply pipe 22 is connected to the hot water supply pipe connection port 4 .

Here, the on-hand switching valve device 23 will be explained.
This hand switching valve device 23 includes a water supply pipe connection port 24, a water faucet pipe connection port 25 connected to a water faucet, and a drain pipe connection port 26.
A set of connection ports consisting of a hot water pipe connection port 27, a hot water tap pipe connection port 28 connected to a hot water tap, a drain pipe connection port 29, and a decompression wood pipe connection port 30, It has a bypass pipe 31 that connects the reduced pressure wooden pipe connection port 30 and the hot water tap piping connection port 28.

Therefore, by rotating the bundle 90 degrees, the internal rotary valve can be switched to supply hot water to the hot water tap and to the water storage tank 20.
A series of operations such as supplying water to the bypass pipe 31, closing the bypass pipe 31, stopping water supply and hot water supply, and stopping the water supply pipe 21. A series of operations such as draining the hot water pipe 22 and supplying reduced pressure water to the boiler by opening the bypass pipe 31 (using a cock not shown) are possible.

Therefore, if hot water supply is started by operating the hand switching valve device 23 from the hot water supply stop state shown in FIG. Due to the area difference between the drive plate 10 and the valve 6, the drive plate 1
0 is pushed toward the hot water supply port connection port 2 side against the pressurization of the urging device 12.

Therefore, after the valve shaft 1 moves, the stepped portion 7' comes into contact with the boss end face 9' and stops, and the valve 6 opens the passage 5, so that the hot water supply pipe connection port 4 is connected to the hot water storage tank 18.
Hot water flows through the system, making it possible to supply hot water.

At this time, the ball valve 15 of the ball valve device 14 closes the upper ventilation hole 17 by water pressure (FIG. 3).

Conversely, if you operate the hand switching valve device 23 to stop hot water supply and drain water from the hot water supply state shown in FIG. The valve 6 is pushed toward the water supply pipe connection port 3 by the urging device 12 that pressurizes the valve 6 .

Therefore, the valve is instantly activated by the biasing device 12 in the passage 5.
The available hot water in the hot water storage tank 18 will not flow out.

Also, water in the hot water supply pipe 22 is discharged, but the ball valve device 1
The ball valve 15 of No. 4 falls onto the lower ventilation hole 16 due to its own weight.

Therefore, outside air flows through the upper ventilation hole 17 and the lower ventilation hole 16.
Since the hot water flows into the hot water pipe connection port 4 through the water, drainage becomes extremely easy.

[Brief explanation of the drawing]

FIG. 1 is a front view, FIG. 2 is a sectional view showing the hot water supply stopped and drained state, FIG. 3 is a sectional view showing the hot water supply state, and FIG. 4 is a schematic diagram showing the installed state. 1...Valve body, 2...Hot water supply port connection port,
3...Oil painting water pipe connection port, 4...Hot water pipe connection port,
5...Passage, 7...Valve stem, 10...
...Drive plate, 12...Biasing device, 14...
... Bonyl valve device, 18 ... Hot water storage tank, 2
0... Water storage tank, 21... Water supply pipe,
22... Hot water pipe, 23... Local switching valve device.

Claims (1)

[Scope of utility model registration request] Hot water supply port connection port 2 that connects to the hot water storage tank hot water supply port of the water heater;
Inside the valve body 1 having a water supply pipe connection port 3 that connects to a water supply pipe to a water heater and a hot water supply pipe connection port 4, a valve 6 is provided that connects the passage 5 between the hot water supply port connection port 2 and the hot water supply pipe connection port 4. and a drive plate 10 that is fixed to the valve shaft 7 and closes the water supply pipe connection port 3, and when hot water is supplied, the water supply port is closed due to the water pressure difference between the water supply pipe connection port 3 side and the hot water supply port connection port 2 side. The valve 6 that opens the passage 5 by moving the drive plate 10 toward the connection port 2 side opens the hot water pipe,
The valve stem 7 has a
A biasing device 12 that constantly pressurizes the valve shaft 7 toward the water supply pipe connection port 3 side
A switching valve device for solar water heaters that is equipped with a.