JPS5827244Y2 - Nouriyoku Kirikaesouchi - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a capacity switching device, and this will be explained in detail based on an embodiment of the drawings. Reference numeral 1 denotes a main body, and within this main body 1 is a valve chamber 1'. is provided.

A gas outlet 2 is provided on one side of the valve chamber 1', a gas outlet 3 leading to the main burner A is placed on the side of the valve chamber 1', and a gas outlet 2 is provided in the valve chamber 1'.
A gas outlet 4 leading to the main burner B is formed in a direction opposite to the main burner B.

The valve chamber 1' is provided with a gas port 2 and a valve 5 for opening and closing a gas outlet 4.

By moving the valve 5 within the valve chamber 1', one side of the valve 5 opens and closes the gas outlet 2 and the other side opens and closes the gas outlet 4. The valve 5 divides the hydraulic response device 6 into an atmospheric chamber 7 and a water chamber 8. The diaphragm 9 is connected via a locking ring 11 and a spring 12 to an interlocking rod 10 which is moved by the displacement of the diaphragm 9 due to water pressure, so that the diaphragm 9 can be opened and closed in an interlocking manner.

A spring 13 presses the diaphragm 9 toward the ice chamber 8.

14 is a water supply port, 15 is an outlet pipe connected to the heat exchanger 16 at the other end, and 17 is a water supply valve.

Reference numeral 18 designates a first valve seat that opens and closes the gas passages to the gas outlets 3 and 4 as the valve 5 moves. Reference numeral 19 designates a second valve seat that opens and closes the gas passages that reach the gas outlet 4 as the valve 5 moves.

20 is an operating shaft, and this operating shaft 20 has a second control shaft for controlling the movement of the valve 5.
A capacity switching eccentric cam 21 is installed which restricts the valve seat from being blocked and which, when rotated by a certain angle, releases contact with the valve 50 and closes the second valve seat.

The present invention has the above configuration, and its operation will be explained next.

First, when a pilot burner (not shown) is ignited by an appropriate means and the water supply pulp 17 is opened, water flows through the water supply port 14,
It reaches a heat exchanger 16 via an outflow pipe 15.

At this time, the hydraulic response device 6 responds due to the water pressure, so the connecting rod 10 moves, and the valve 5 moves to the left in the drawing via the spring 12, and comes into contact with the surface of the protruding part of the capacity switching eccentric cam 21. first valve seat 18, second valve seat 19 to restrict subsequent movement.
Stops at an intermediate position.

Therefore, both the first valve seat 18 and the second valve seat 19 are opened, and gas flows out from the gas population 2 to the gas outlet 3 leading to the main burner A and the gas outlet 4 leading to the main burner B.

When it is desired to further reduce the combustion capacity, when the operating shaft 20 is rotated by a certain angle, the protruding part A of the capacity switching eccentric cam 21 releases contact with the valve 5, and the elastic force of the spring 120 causes the valve 5 to
moves further to the left in the drawing and closes the second valve seat 19.

Therefore, the gas flowing in from the gas population 2 flows out to the main burner A through the gas outlet 3, but since no gas flows into the main burner B, the combustion capacity is halved.

In this embodiment, the diaphragm 9 is used for a water heater.
The valve 5 is moved in response to the water supply, and the gas passage is opened and closed in connection with the water supply, and the burner capacity is switched by manual operation of the operating shaft 20 to which the capacity switching eccentric cam 21 is attached.

As described above, the present invention has a valve built into the main body forming a gas inlet and two gas outlets, and the valve is moved by a hydraulic response device to block the passages to the two gas outlets. Alternatively, the passage to two gas outlets is opened, or the passage to only one gas outlet is opened, so that the opening/closing valve for the gas passage to the main burner and the switching valve for switching the burner capacity can be used. There is no need to provide a separate switching valve as in the past, the entire gas mechanism can be made more compact, and the water temperature can be controlled to be high or low while keeping the water volume constant, which is extremely useful in practice. .

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the overall configuration of an embodiment of the present invention, and FIGS. 2 and 3 are enlarged views of main parts. 1...Main body, 5...Valve, 9...
・Diaphragm, 18...First valve seat, 19...
...Second valve seat, 21... Eccentric cam for capacity switching.

Claims (1)

[Scope of utility model registration request] A first valve seat and a second valve seat are formed facing each other from upstream of the gas inlet in a valve chamber having a gas inlet at one end, and one gas outlet is connected from between both valve seats, and the other gas is connected from downstream of the second valve seat. An outlet is provided, and the valve body disposed between the two valve seats is associated with a hydraulic response device so as to close the second valve seat when water is flowing, and the valve body is regulated to a position where both valve seats are not blocked. A capacity switching device characterized by being provided with an operation cam.