JPH0138462Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an instantaneous water heater with a timer.

If a small instantaneous gas water heater without an exhaust pipe is used continuously for a long period of time, combustion gas will fill the room, resulting in a lack of oxygen, and there is a danger that incomplete combustion will eventually occur, resulting in gas poisoning. . For this purpose, for example, as known from Japanese Patent Publication No. 51-18658, a water stop valve is provided on the upstream side of the water supply channel leading to the diaphragm chamber on one side of the diaphragm that operates the hydraulically responsive valve, and from the upstream side of the water stop valve. The chambers on one side of the diaphragm are communicated with the chambers on the other side through a branching water supply channel, and a timer valve is further provided in the middle of the water supply channel, and the timer valve is interlocked with this only when the water stop valve is opened. When the timer is set, the timer valve is closed and the chamber on the other side of the diaphragm is made to have a negative pressure by the ventilating action of running water. The water pressure-responsive valve is opened by the applied water supply pressure, and when the timer set time has elapsed, the timer valve opens and short-circuits both chambers, keeping them at equal pressure and eliminating the differential pressure, automatically opening the gas passage. It is known that the above-mentioned disadvantages can be solved by closing. However, this method not only requires a water passage that communicates the chambers on both sides of the diaphragm chamber, but also requires a timer valve to be installed in the water passage, making the structure complicated. At the same time, the timer must be reset, which is inconvenient and cumbersome to operate.

The purpose of the present invention is to obtain a water heater with a timer that does not have such inconveniences. A bypass passage 5 that bypasses the exchanger 2 and reaches the hot water outlet 3 is branched from the downstream side of the water supply passage 7 equipped with a water stop valve 6, and a gas valve 8 that responds to the water supply pressure is connected to the main gas burner 1. An actuator 11 and an operator 10 facing into a water supply channel 7 which is rotatably operated by an operator 10 outside the water stop valve 6 in an instantaneous water heater facing a gas passage 9. and a ball valve 13 which is retracted from the valve hole 12 by the actuator 11.
The water wheel 15 is connected to a water wheel 15 facing the main waterway 4 through a water passageway 4.

What is shown is a shaft 16 that is integrated with the operator 10.
The operating element 11 is mounted on the operating shaft 16.
A reduction gear train 17 is interposed between the reduction gear train 17 and the water wheel 15, and a friction plate clutch is interposed as the clutch 14 between the final stage gear 17a of the reduction gear train 17 and the operating shaft 16. To explain this in detail, the final stage gear 17a is slidably inserted into the operating shaft 16, and the friction plate piece 14a on the operating shaft 16 and the gear 17a
The upper friction plate piece 14b is always press-fitted by the spring 18, and when the operator 10 is pressed against the spring 18, the press-fit engagement is released. However, it goes without saying that the clutch is not limited to such a friction plate clutch, but may also be a dog clutch or other clutch. still,
In the drawing, reference numeral 19 indicates a temperature control valve, through which the water supply channel 7 is branched into a main flow channel 4 and a bypass flow channel 5.

When rotating the water heater counterclockwise with the operator 10 pressed, the clutch 14 disconnects the water wheel 15 and the operator 11 and rotates the operator 11 counterclockwise. As a result, the ball valve 13 that closes the valve hole 12 is moved away, and the water stop valve 6 is opened. Therefore, water is supplied into the water supply channel 7, and the gas valve 8 opens according to the water supply pressure to the heat exchanger 2.
The water wheel 15 rotates at the same time as it heats the feed water passing through the
3 to the valve closing side, that is, to the clockwise direction. Therefore, when a certain amount of water is supplied, the ball valve 13 is pushed by the actuator 11 and closes the valve hole 12 after a certain amount of water has passed. Therefore, water flow to the water supply channel 7 is cut off and the gas valve 8 is closed. Incidentally, the amount of water flowing through the main water passage 4 is approximately constant in the bypass mixing type equipped with the bypass passage 5. Therefore, the amount of rotation of the water wheel 15 interposed in the main water passage 4 is approximately proportional to time. Therefore, if the water heater continues to be used for a certain period of time, the water stop valve 6 will automatically close to stop the water heater from being used.

In this way, according to the present invention, the water stop valve 6 is rotated by the water supply channel 7 which is rotated by the external operator 10.
A water turbine 15 comprising an actuator 11 provided therein and a ball valve 12 which is retracted from a valve hole 13 by the operator 10, and in which the actuator 11 faces the main water passage 4 via a clutch 14. If you continue to use the water heater for a certain period of time, the water stop valve 6 will automatically close, and the gas valve 8, which opens due to the water supply pressure, will also be closed, allowing you to continue using the water heater. This prevents the inconvenience of indoor exhaust air filling up.
In addition, all operations are performed by simply operating the operator 10 of the water stop valve 6, and there is no need to reset the timer or other separate operations as in the conventional example, making the operation easy. A clutch 14 between the operator 10 and the operator 10
The operation of the operator 10 can be disconnected from the water wheel 15 during operation, thereby making it extremely easy to operate the operator 10.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of one example of implementing the present invention;
The figure is an enlarged cross-sectional view taken along the - line, and FIG. 3 is a diagram showing its operating state. 1... Gas burner, 2... Heat exchanger, 3... Outlet, 4... Main passageway, 5... Bypass passageway,
6... Water stop valve, 7... Water supply channel, 8... Gas valve, 9
... Gas passage, 10 ... Operator, 11 ... Operator, 12 ... Valve hole, 13 ... Ball valve, 14 ...
Kuratsuchi, 15... Waterwheel.

Claims (1)

[Scope of utility model registration request] A main water passage 4 that passes through a heat exchanger 2 heated by a gas burner 1 and reaches a hot water outlet 3, and a bypass water passage 5 that bypasses the heat exchanger 2 and reaches a hot water outlet 3 are connected to a water supply provided with a water stop valve 6. In an instantaneous water heater of the type in which the passage 7 is branched from the downstream side and the gas valve 8 responsive to the water supply pressure faces the gas passage 9 of the main gas burner 1, the water stop valve 6 is operated externally. It is composed of an actuator 11 facing into the water supply channel 7 which is rotatably operated by a child 10, and a ball valve 13 which is moved out of a valve hole 12 by the actuator 10, and the actuator 1
1 is linked to a water wheel 15 facing a main water passage 4 via a clutch 14.