JPH0263131B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a water boiler equipped with a gas control unit that controls the operation of a main burner and an pilot burner that heat a heat exchanger, and a water valve that controls water flow to the heat exchanger. This invention relates to a push-button operation device for a container.

Conventionally, this type of water heater has an ignition operator that operates the gas control unit to ignite the pilot burner, and an oil outlet operator that opens the water valve to allow water to flow to the heat exchanger. When the pilot burner is first ignited by the ignition operator, and then the water pressure-responsive automatic gas valve interposed in the gas passage leading to the main burner is opened by water flow using the tapping operator. In general, the main burner is ignited from the pilot burner to obtain hot water dispensing operation, and in order to improve operability, each of the ignition and hot water dispensing controls in such a water heater is configured with a push button. However, in any case, tapping the hot water would require the operation of two controls, and in order to further improve operability, the push button for igniting and tapping the hot water could be shared and pressed once. It is desirable that hot water can be tapped by operation.

However, in this case, ignition and water flow are performed at the same time, and when the pilot burner is ignited, gas is also supplied to the main burner, which may cause an explosion and ignition, so it is necessary to solve this problem. Become. An object of the present invention is to provide a push-button operation device that meets such requirements, and includes a gas control unit that controls the operation of a main burner and a pilot burner that heat a heat exchanger, and a gas control unit that controls the operation of a main burner that heats a heat exchanger and a pilot burner. In a push-button operating device for a water heater, the water heater is equipped with a common push button for operating the gas control unit and the water valve. A normally closed gas valve located upstream of a branch of the pilot gas passage leading to the pilot burner and a normally open gas valve located downstream of the branch are provided in the main gas passage leading to the pilot burner, and a normally open gas valve located downstream of the branch. A normally closed type gas valve and a normally open type gas valve are arranged so as to be interlocked by one valve rod, and a push button is provided to press the valve rod, and by pressing the push button once, the water valve and the normally closed gas valve are connected. The normally open type gas valve is held open, and the pilot burner is ignited when the normally open type gas valve is closed at the end position of the push button, and the normally open type gas valve is ignited when the press of the push button is released. The present invention is characterized in that the main burner is ignited from the pilot burner by opening the gas valve.

Next, the present invention will be explained with reference to the illustrated embodiments.

FIG. 1 shows the external appearance of a water heater to which the apparatus of the present invention is applied. Inside the water heater, as shown in FIG. 2, there is a heat exchanger 1, a main burner 2 for heating the heat exchanger 1, and The main burner 2 and the pilot burner 3 are provided with a gas control unit 4 that controls the operation of the main burner 2 and the pilot burner 3, and a water valve 5 that controls water flow to the heat exchanger 1. A common push button 6 for operating the control unit 4 and the water valve 5 is provided on the front of the water heater.

The control unit 4 includes the main burner 2.
The pilot burner 3 is interposed in the main gas passage 7 leading to the
An electromagnetic safety valve 9 and a manual shutoff valve 10 as normally closed gas valves are located upstream of a branch of the pilot gas passage 8 leading to the pipe, and a normally open gas valve 11 is located downstream of the branch. The shutoff valve 10 and the normally open gas valve 11 are assembled to a common valve rod 12, and a first operating rod 1 interlocked with the push button 6 is attached to the front end of the valve rod 12.
3 facing each other and pushing the push button 6 from the starting end position A to the rear end position B against the return spring 6a, the first operating rod 13 will come into contact with the valve rod 12, and at the intermediate position C. The shutoff valve 10 is opened, and then the normally open gas valve 11 is closed by pushing beyond the intermediate position C toward the end position B. Finally, the lever 14 interlocked with the valve rod 12 is moved. The electromagnetic safety valve 9 is pressed open through the opening.

The water valve 5 is constituted by a spool-type valve, to which a second operating rod 15 linked to the push button 6 is connected, and when the push button 6 is pressed from the starting end position A, it is moved to the intermediate position C. The water valve 5 is opened to a predetermined opening degree, and when water is passed through the heat exchanger 1 by opening the water valve 5, a water flow detector 16 such as a water governor or a flow switch is used to detect the normally open type. An automatic valve 17 interposed in the main gas passage 7 on the downstream side of the gas valve 11 is opened.

In addition, in the one shown in the second figure, the first and second operating rods 13,
15 is integrally constituted by a U-shaped frame attached to the rear end of the button rod 6b leading to the push button 6, but the structure is not limited to this. For example, as shown in FIG. 8 or FIG. One or both of the operating rods 13, 15 may be linked to the push button 6 via swing links 13a, 15a.

Further, the push button 6 is connected to an ignition switch 19 connected in series to an igniter 18 facing the pilot burner 3, as shown in FIG.
It also operates the hold switch 21 which causes the discharge current to flow from the capacitor 20. To explain this in detail, the switches 19 and 21 are operated as shown in FIGS. 3 and 4.
As shown in the figure, each cam projection 19a,
When the push button 6 is pressed, the ignition switch 19 is closed near the end position B, the igniter 18 is activated, and the hold switch is activated. 2
1 is switched to an a contact which discharges discharge to the solenoid 9a from before the intermediate position C, and when the push button 6 returns to the intermediate position C described later, the pilot burner 3
The safety valve 9 is forcibly held in the open state by the discharge from the capacitor 20 until a predetermined electromotive force is generated from the thermocouple 22 facing the center of the push button 6. When the hold switch 21 returns to the starting position A, the hold switch 21 is switched to the B contact that charges the capacitor 20 via the solenoid 9a, and the thermocouple 22 is charged with a charging current of opposite polarity. The excitation of the solenoid 9a by the electromotive force of the pair 22 is released and the safety valve 9 is immediately closed. In the drawing, 23 indicates a locking mechanism provided to lock the return operation of the push button 6 from the terminal position B by the return spring 6a at an intermediate position C. In this case, the locking mechanism 23 is separate from the push button 6. It is also possible to configure the lock mechanism with a normal lock mechanism that is unlocked by an operator, but in the illustrated embodiment, the lock mechanism is unlocked by pressing the push button 6 again from the intermediate position C. It was designed to consist of a push-pull mechanism.

To explain this in more detail, the locking mechanism 23 is provided with an oscillating head provided on the machine frame side in a cam groove 25 on a cam plate 24 attached to the button rod 6b, as shown in FIGS. 2 and 3. It is constructed of a heart cam type push mechanism in which a freely movable engager 26 is elastically inserted by a spring 26a, and the cam groove 25 is formed into a stepped shaped deformed heart as shown in FIGS. 6 and 7. When the push button 6 is pressed backward from the starting end position A, the engager 26 moves relative to the cam plate 24 in the opposite direction.
6 is moved from point a corresponding to starting position A to point b corresponding to terminal position B via the groove 25a extending forward, and when returning from terminal position B, the engaging element 26 is moved diagonally from point b. Groove 25 extending rearward
b to point C corresponding to the intermediate position C, and the push button 6 is locked at the intermediate position C by the engagement of the engager 26 with the groove wall 25c at the point C; When the push button is pressed again from the intermediate position C, the engager 26 is moved to point d adjacent diagonally in front of the point C, and the lock at the intermediate position C is released, and the press of the push button 6 is released. Then, the engaging element 26 is moved from the point d to the point a side via the groove 25d extending rearward, and the push button 6 is given a return action to the starting end position A.

Next, the overall operation of the above embodiment will be explained. When tapping hot water, first push the push button 6 to the starting position A.
According to this, the water valve 5 and the gas control unit 4 are pressed.
The electromagnetic safety valve 9 and the cutoff valve 10, which are normally closed gas valves provided in the Ignition by actuation is provided.

Next, the push button 6 is released, but at this time, the push button 6 is locked by the locking mechanism 23 at an intermediate position C where the water valve 5 does not cause the shutoff valve 10 to close, and the water valve 5 and The shutoff valve 10 is kept open, while the normally open gas valve 11 is opened during the return operation of the push button 6 from the terminal position B to the intermediate position C, so that the valve 11 and the water By supplying gas to the main burner 2 through the automatic valve 17, which is opened in advance by water flow when the valve 5 is opened, the main burner 2 is given spark ignition from the pilot burner 3, and a hot water tapping operation is obtained. It will be done.

Furthermore, according to the return of the push button 6 to the intermediate position C,
The pressure opening of the electromagnetic safety valve 9 is also released, but the safety valve 9 is discharged from the capacitor 20 and then the thermocouple 2
The valve is held in the open state by the electromotive force of No. 2.

Next, when the push button 6 is pressed again from the intermediate position C, the lock by the locking mechanism 23 is released, the push button 6 is returned to the starting position A, and the water valve 5 is released.
, the shutoff valve 10 , and a hold switch 21
By switching to the b contact, the electromagnetic safety valve 9 is opened, and the water flow to the heat exchanger 1 is stopped.
The main burner 2 and pilot burner 3 are extinguished, and the hot water tapping operation is stopped.

As a result, hot water can be dispensed by pressing the push button 6 once, which makes the operation easy.Moreover, by pressing the push button 6 again and discharging the hot water, dispensing can be stopped, not only the main burner 2 but also the main burner 2 can be dispensed. The pilot burner 3 is also extinguished, and forgetting to extinguish it is reliably prevented.

In the above embodiment, the locking mechanism 23 consisting of a pushbutton mechanism is attached to the pushbutton 6 so that the pushbutton 6 can be moved to the terminal position B.
Although the push button 6 is stopped at the intermediate position C, the push button 6 may be returned directly from the terminal position B to the starting position A. In this case, the operation members of the gas control 4 and the water valve 5 A push mechanism is attached to each of the first and second operating rods 13 and 15, and after the first press operation of the push button 6, the operating rods 13 and 15 are operated so that the shutoff valve 10 and the water valve 5 are not closed. position (the position when the push button is in the intermediate position in the above embodiment), and by a second pressing operation, each operating rod 13, 15 is unlocked and returned to its old position, and the shutoff valve is closed. By closing the water valve 10 and the water valve 5, the same operation as in the above embodiment can be obtained.

Further, in the above embodiment, the electromagnetic safety valve 9 and the cutoff valve 10 are provided as normally closed gas valves interposed in the main gas passage 7 on the upstream side of the branching part of the igniter gas passage 8, but either one of them may be omitted. is also possible, and the first
Figure 0 and below show an embodiment in which only an electromagnetic safety valve 9 is provided as a normally closed gas valve.

In this case, it is desirable to provide a normally closed pilot valve 27 in the pilot gas passage 8 in order to reliably prevent gas leakage from the pilot burner 3 when not in use.
In the embodiment shown in the figure, a third operating rod 28 is provided which opens and closes the pilot valve 27 in conjunction with the push button 6.
According to the pressing operation from the starting end position A, the intermediate position C
The pilot valve 27 is opened by being pushed by the cam portion 28a at the tip of the third operating rod 28, and the pilot valve 27 is closed by returning the push button 6 to the starting end position A. In the embodiment shown in FIG. 11, the electromagnetic safety valve 9
The pilot valve 27 is opened and closed at the same timing as described above by a cam 29 attached to the lever 14, which is pressed to open the valve, and in the embodiment shown in FIG. The push button 6 is interlocked with the push button 6 via the freely inserted connector 30.
The connector 30 due to the pressing operation from the starting end position A
The valve lever 27a is pushed by the spring 31, and the pilot valve 27 is opened at the intermediate position C of the push button 6. is brought into contact with the bush 33 on the side of the gas control unit 4, and when the push button 6 is pushed beyond the intermediate position C to the terminal position B, the pushing of the pilot valve 27 is regulated. The pushing stroke of the pilot valve 27 is made smaller than that of the push button 6, so that the pilot valve 27 can be made smaller.

Furthermore, in order to improve the ignition performance of the pilot burner 3, an air purge valve that opens near the end position of the push button 6 is provided in addition to the ignition valve 27, and the purge burner connected to the valve is used as the pilot burner. 3 may be installed in parallel.

In the case shown in FIG. 10, a crank cam type push mechanism is used as the locking mechanism 23 for locking the push button 6 at the intermediate position C.

Next, to explain its operation, when the push button 6 is pressed from the starting end position A, the water valve 5 is opened, the electromagnetic safety valve 9 and the pilot valve 27 are opened, and at the end position B, the water valve 5 is opened. The pilot burner 3 is ignited when the normally open gas valve 11 is closed, and upon returning to the intermediate position C, the normally open gas valve 11 is opened and the pilot burner 3 to the main burner 2 is ignited. When the push button 6 is pressed again from the intermediate position C to return to the starting position A, the water valve 5
The pilot valve 27 is closed, the automatic valve 17 is also closed due to the water flow being stopped, the main burner 2 and the pilot burner 3 are extinguished, and the hot water tapping operation is stopped. Further, the electromagnetic safety valve 9 is closed simultaneously with the return of the push button 6 to the starting position A without waiting for the thermocouple 22 to cool down by switching the above-mentioned hold switch 21 to the b contact shown in FIG.

As described above, according to the present invention, the operators for the gas control unit and the water valve are configured with a common push button, and the hot water tapping operation can be obtained by pressing the push button once, and the operation In addition, the gas control unit is provided with a normally closed gas valve interposed in the main gas passage upstream of the branch of the pilot gas passage, and the normally open gas valve is closed at the end position of the push button. In other words, when the gas supply to the main burner is cut off, the pilot burner is ignited, and when the push button is released, the normally open gas valve is opened, and the flame from the pilot burner is supplied to the main burner. It is designed to give a shifting ignition, and has the effect of safely and easily performing hot water tap operation without causing explosive ignition.

[Brief explanation of the drawing]

Fig. 1 is a front view of an example of a water heater equipped with the device of the present invention, Fig. 2 is a cross-sectional plan view of its main parts, Fig. 3 is a side view cut along the line - - in Fig. 2, and Fig. 4 is Fig. 3 is a cross-sectional view taken along the - line, Fig. 5 is a circuit diagram of the electrical system, Fig. 6 is a plan view of the cam plate that constitutes the locking mechanism of the push button, and Fig. 7 is a view along the cam groove of the cam plate. 8 to 12 are cutaway plan views showing different embodiments of the device of the present invention. 1... Heat exchanger, 2... Main burner, 3... Pilot burner, 4... Gas control unit, 5...
...Water valve, 6...Push button, 7...Main gas passage, 8
...Pilot gas passage, 9...Solenoid safety valve (normally closed gas valve), 10...Shutoff valve (normally closed gas valve), 11...
... Normally open type gas valve, 13 ... First operating rod (operating member for gas control unit), 15 ... Second operating rod (operating member for water valve), 23 ... Locking mechanism.

Claims (1)

[Scope of Claims] 1. A push-button type water heater that includes a gas control unit that controls the operation of a main burner that heats a heat exchanger and a pilot burner, and a water valve that controls water flow to the heat exchanger. In the operating device, a common push button for operating the gas control unit and the water valve is provided, and the gas control unit is arranged in a main gas passage leading to the main burner to control the pilot gas leading to the pilot burner. A normally closed gas valve located upstream of a branch of the passage and a normally open gas valve located downstream of the branch are provided, and the normally closed gas valve and the normally open gas valve are connected to one valve rod. A push button is provided to press the valve rod, and a single press of the push button causes the water valve and the normally closed gas valve to be held open, and the end of the push button is pressed. ignition of the pilot burner with the normally open gas valve in the closed state at the position, and ignition of the pilot burner to the main burner due to the opening of the normally open gas valve upon release of the push button. A push-button operation device for a water boiler, characterized in that a transitional ignition is provided. 2 The push button is locked at an intermediate position where the water valve and the normally closed gas valve do not close when the push button returns from the push end position to the start end position by a locking mechanism assembled thereto. Claim 1, wherein the water valve and the normally closed gas valve are closed when the push button returns to its starting position by releasing the lock. Push-button operating device for water heaters. 3. The push-button operation of the water heater according to claim 2, wherein the locking mechanism is a push-button mechanism that is released by pressing the push button again from an intermediate position. Device.