JPH0220611Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combustion safety device used in gas stoves and other gas appliances.

Conventionally, this type of device has installed a manually opened electromagnetic safety valve in the gas supply path that is held open by the electromotive force of a thermocouple facing the burner to prevent raw gas from being released in the event of a misfire. In this case, it is assumed that the electromagnetic safety valve is opened by the ignition operation by pushing and turning the operator, and after the burner is ignited, the thermocouple indicates a predetermined value that is sufficient to keep the electromagnetic safety valve open. Preheating time until electromotive force is generated A general method is to hold the operator in a pressed state to hold the electromagnetic safety valve in an open state, which is difficult to operate, and we have tried to eliminate this inconvenience. It is also known that a forced hold circuit using a capacitor is provided so that the electromagnetic safety valve is kept open during the preheating time by the forced hold circuit even if the pressing operation on the operator is released after the ignition operation. However, it is necessary to operate the ignition by pushing and turning the controller,
It is difficult to operate for people with hand disabilities.

Therefore, it may be possible to make the ignition operation easier by simply pressing a push button, but if the operation is made easier, there is a concern that children may play tricks on it, so it is desirable to take measures to prevent this. .

The purpose of the present invention is to provide a device that meets such demands, and as illustrated in the drawing, a thermocouple 2 that generates an electromotive force when the burner 1 is ignited is interposed in the gas supply path 3. During a certain period of time between the drive circuit 6 of the electromagnetic safety valve 4 connected to the drive coil 5 of the manual opening type electromagnetic safety valve 4 and the predetermined electromotive force being generated from the thermocouple 2 after the burner 1 is ignited. In the combustion safety device comprising a forced hold circuit 7 for holding the electromagnetic safety valve 4 open, a first
A self-resetting type drive circuit is provided with a start button 8 and a second start button 10, and the drive circuit 6 is closed by pressing the first start button 8 and opened by pressing the first start button 8 again. Interveningly connect the first start switch 9 of the electromagnetic safety valve 4.
The second start button 10 constitutes the operation part of the manual operation member 12 for opening the valve, and the manual operation member 12 is placed in the operation position for opening the electromagnetic safety valve 4 by pressing the second start button 10. The second start switch 11 is moved and held at the operating position by holding the electromagnetic safety valve 4 open, and is mechanically interlocked with the manual operating member 12 to close the second start switch 11 at the operating position. The second start switch 11 is interveningly connected to the forced hold circuit 7.

As shown in the second figure, the electromagnetic safety valve 4 is composed of a valve body 14 that opens and closes the valve hole 13, and an electromagnet 15 that holds the valve body 14 in the open position. Generally, the valve body 14 and a push rod that presses it are provided facing each other so as to be able to move toward and away from each other, but the manual operation member 12 of the present invention, which corresponds to the push rod, is integrally connected to the valve body 14. the second start button 1 whose tip is provided on the operation panel 16 of the combustion appliance as shown in the second figure.
Provided opposite to 0. Thus, when the second start button 10 is pressed, the second start button 10 comes into contact with the manual operation member 12 as shown by the dotted line, moves it to the operation position, and opens the electromagnetic safety valve 4. Open the valve.

Further, the cam portion 12a is attached to the manual operation member 12.
A second start switch 1 consisting of a limit switch that cooperates with the cam portion 12a is provided near the second start switch 1.
1, the second start switch 11 is pushed by the cam portion 12a and closed when the manual operation member 12 moves to the operating position, thereby driving the forced hold circuit 7, and the second start switch 11 is closed. capacitor 17
is discharged for a certain period of time, and this discharge current
5, that is, the drive coil 5 of the electromagnetic safety valve 4, the electromagnet 15 is driven, the valve element 14 is held in the open position for a certain period of time, and the burner 1 is ignited within this certain period of time. If a predetermined electromotive force is generated from the thermocouple 2, the drive coil 5 continues to be energized by the predetermined electromotive force, the electromagnet 15 continues to be driven, and the valve body 14 opens. state, the manual operation member 12
The second start switch 11 is also held in the operating position so that the second start switch 11 is held in the closed state.

In the first illustration, another second start switch 11 is provided, which is interveningly connected to the ignition circuit 19 of the burner 1 with the relight sparker 18, so that the manual operating member 12 is in the operating position. When the second start switch 11' is closed,
A power supply voltage is applied to the rewrite sparker 18 to drive the rewrite sparker 18.

Note that the relight sparker 18 stops driving when the burner 1 is ignited.

Figure 3 shows the operation panel 16 of the two-burner stove with grill.
In this case, there are three first ones, one for the gas stove on the left, one for the gas stove on the right, and one for the grill.
Start buttons 8, 8, 8 and second start buttons 10, 10, 10 are provided.

In Fig. 3, 20 is an operator for opening and closing the main valve, 21,
Reference numerals 21, 21, and 22, 22, 22 indicate the operating elements and operation confirmation lamps for adjusting the thermal power of the burners 1, 1, 1 for the gas stove on the left side, for the gas stove on the right side, and for the grill, respectively.

Next, to explain its operation, first, press the first start button 8 and switch the first start switch 9.
The thermocouple 2 and the drive coil 5 of the electromagnetic safety valve 4 are connected. At this time, the burner 1 is not ignited and no electromotive force is generated from the thermocouple 2, so the electromagnetic safety valve 4 is not opened. Next, press the second start button 10 to activate the manual operation member 1.
2 is moved to the operating position, the second start switch 11 is closed during the movement, and the forced hold circuit 7 and the ignition circuit 19 are driven.
After the movement, the electromagnetic safety valve 4 is opened. This valve opening is maintained for a certain period of time by driving the forced hold circuit 7, and when a predetermined electromotive force is generated from the thermocouple 2 within a certain period of time after the burner 1 is ignited by the ignition circuit 19, the drive circuit 6, the electromagnetic safety valve 4 is kept open even after the predetermined time period has elapsed.

To close the electromagnetic safety valve 4, the first start button 8 may be pressed again to open the first start switch 9. According to this, thermocouple 2
is disconnected from the drive coil 5 of the electromagnetic safety valve 4,
When the electromagnetic safety valve 4 is released from the open state, the manual operation member 12 is returned from the operation position to its original position, and during the return, the second start switch 11 is opened and the forced hold circuit 7 and the ignition circuit 19 are opened. stops driving.

In this way, according to the present invention, the gas supply path 3
Since the electromagnetic safety valve 4 installed in the valve can be opened and kept open by pressing the first and second start buttons 8 and 10, it is not necessary to press the operator like the conventional one. It eliminates the need for troublesome operations such as rotation, and has the effect of allowing easy operation, especially for people with hand disabilities.

Further, according to the present invention, opening the electromagnetic safety valve 4 and keeping the valve open are performed by sequentially operating the two start buttons 8 and 10.
The burner 1 is safe because it will not be ignited carelessly even if a child simply plays a trick, such as when opening and holding the valve open with the first start button. The first start switch 9 operated by the electromagnetic safety valve 4
The first start button 8 is closed by pressing the first start button 8 and opened by pressing the first start button 8 again. By simply pressing the button again, the first start switch 9 can be opened, the drive circuit 6 can be opened, and the safety valve 4 can be closed. That is, two push buttons 8 and 1 are provided to prevent the burner 1 from being accidentally ignited due to a child's mischief.
0, press and operate the first start switch 9.
There is an advantage that the start button 8 can also be used as the OFF button of the combustion safety device.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an example of the implementation of the device of the present invention, Fig. 2 is a cutaway side view showing an example of the manual operation member of the invention, and Fig. 3 is a front view of a gas appliance to which the device of the present invention is applied. It is a diagram. 1... Burner, 2... Thermocouple, 3... Gas supply path, 4... Electromagnetic safety valve, 5... Drive coil, 6...
...Drive circuit, 7...Forced hold circuit, 8...First start button, 9...First start switch, 10...Second start button, 11...Second
Start switch, 12...Manual operation member.

Claims (1)

[Scope of utility model registration request] A drive circuit 6 for an electromagnetic safety valve 4 that connects a thermocouple 2 that generates an electromotive force when the burner 1 is ignited to a drive coil 5 of a manually opened electromagnetic safety valve 4 installed in a gas supply path 3; A combustion safety device includes a forced hold circuit 7 that holds the electromagnetic safety valve 4 open for a certain period of time until a predetermined electromotive force is generated from the thermocouple 2 after ignition of the thermocouple 2. 2 start buttons 10 are provided in the drive circuit 6, and a self-resetting type first start switch that is closed when the first start button 8 is pressed and opened when the first start button 8 is pressed again. 9 and connects the operating section of the manual operation member 12 for opening the electromagnetic safety valve 4 to the second
Consisting of a start button 10, the manual operation member 1
2 is moved to the operating position for opening the electromagnetic safety valve 4 by pressing the second start button 10, and is held at the operating position by holding the electromagnetic safety valve 4 open, and the manual operation A second start switch 11 is provided which is mechanically interlocked with the member 12 and is closed in its operating position.
1 is interveningly connected to the forced hold circuit 7.