JPH037721Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a safe combustion device for gas-burning appliances.

[Prior Art] Regarding gas-burning appliances such as gas bath kettles and gas instantaneous water heaters, which are operated by ordinary citizens, one of the most important issues is the safety prevention of raw gas release accidents. One solution to this problem is to install a normally closed electromagnetic safety valve in the gas inlet to the device.
The electromagnetic safety valve is kept open by the power generated by the thermocouple heated by the flame of the sub-burner, which serves as the source of the main burner of the gas appliance, until the required thermoelectromotive force is obtained after the sub-burner is ignited. Methods that rely on the discharge current of a capacitor that has been previously charged with a battery are becoming popular.

[Problem to be solved by the invention] However, in the above technology, since the capacitor is completely discharged, a charging current is passed from the battery to the capacitor every time it is operated again, which causes the battery to wear out quickly and requires replacement of the battery. The problem was that it had to be done relatively frequently.

The purpose of this invention is to prevent the capacitor that supplies discharge current to the electromagnetic gas safety valve from continuing to discharge unnecessarily until the electromotive force of the thermocouple that keeps the electromagnetic safety valve open reaches the required level. To provide a combustion control device for gas appliances that eliminates

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a first switch that charges a first capacitor electrically connected to a fulcrum with a battery electrically connected to a charging side contact; a second switch that is interlocked with the switch and electrically connects a second capacitor to a fulcrum, the battery to a charging contact, and a relay to a discharging contact; an electromagnetic safety valve that opens when energized; and the safety valve. and a main burner, which closes when energized, and only the electromagnetic gas safety valve is energized by the electromotive force of the thermocouple facing the sub-burner, and the first capacitor is discharged. In the case of current, the first relay includes a valve circuit that excites both the electromagnetic safety valve and the electromagnetic main valve, and an igniter that ignites a sub-burner provided downstream of the electromagnetic safety valve.
The valve circuit and the discharge side contact of the first switch are electrically connected through a make contact, and the igniter and the battery are electrically connected through a second make contact of the relay. .

[Actions and Effects of the Invention] With the above configuration, the combustion control device for gas appliances of the present invention has the following effects.

(Function) When the fulcrums of the first and second switches switch from the charging side to the discharging side, the relay is actuated by the charging current of the second capacitor and the first and second make contacts are turned on.

A discharge current flows from the first capacitor to the valve circuit via the first make contact, the electromagnetic safety valve is energized and opened, and gas is supplied to the sub-burner. The solenoid main valve is energized, so it closes.

The battery and the igniter are electrically connected via the second make contact, and the auxiliary burner is ignited by the igniter.

When the charge in the second capacitor decreases below a certain level, the relay stops operating and the first and second make contacts turn off. The igniter is deactivated and the electrical connection between the first capacitor and the valve circuit is completely severed.

The electromagnetic safety valve is continuously excited by the electromotive force of the thermocouple, but the electromagnetic main valve is not excited by this electromotive force and opens.

Gas is supplied to the main burner, and the main burner is ignited by the sub-burner.

(Effect) The first capacitor, which allows discharge current to flow through the electromagnetic safety valve until the electromotive force of the thermocouple that keeps the electromagnetic safety valve open reaches the required level, can be prevented from continuing unnecessary discharge more than necessary. .

When re-operating, the time required to charge the first capacitor is not prolonged.

[Example] A safety ignition device for gas combustion equipment will be described with reference to the drawings.

1 is a normally closed electromagnetic safety valve, 2 is a thermocouple for keeping the electromagnetic safety valve 1 open, 3 is a capacitor as a power source for the electromagnetic safety valve 1 immediately after the ignition operation, 1
1 is a battery for charging the capacitor 3 and the capacitor 12; SW1 is a switch for switching the charging/discharging circuit of the capacitor 3; and 4 is an electromagnetic main valve for the main burner 19 of the gas appliance.

Further, 13 is an igniter for the sub-burner 18 as a spark for the main burner 19, 12 is a capacitor as a power source for ignition, SW2 is a switch for switching the power supply circuit for charging and discharging the capacitor 12, and 14 is a switch for changing the discharge current of the capacitor 12. A relay that is operated by the
15 and 16 are interlocking make contacts of the relay 14.

In addition, FIG. 5 as a cross-sectional view of the device of the present invention,
In FIGS. 6 and 7, which show side sectional views of two locations, and FIG. 8, which shows a side view, 20 is the device casing, 6 is the ignition operating shaft, 1 is the electromagnetic safety valve, and 5 is the pilot for the sub-burner 18. Valves 7, 8, 9 and 10 are fixed to the ignition operating shaft 6 and rotate, respectively, and are actuating cams for the electromagnetic safety valve 1, the electromagnetic main valve 4, the pilot valve 5, and the switches SW1 and SW2.

FIG. 2 is a conceptual diagram of the arrangement of the main components of the device of the present invention, in which 17 is a discharge part of the igniter 13, 18 is a sub-burner, and 19 is a main burner.

In addition, the fifth diagram as a structural diagram of the device of the present invention described above is also provided.
In the figures to FIG. 8, 21 and 22 are solenoids for operating the electromagnetic safety valve 1 and the electromagnetic main valve 4;
23 and 24 are push rods for transmitting the acting force of the cam attached to the ignition operating shaft 6 to the electromagnetic safety valve 1 and the electromagnetic main valve 4, and 25 and 32 and 26 and 33 are the electromagnetic safety valve 1 and the electromagnetic main valve 4, respectively. This is a group of springs that keep the cam in a state linked to the movement of the cam via the pressing rod of the cam. 27 and 28 are a pressure rod and a valve closing spring for the pilot valve 5; 29, 3;
0 and 31 are gas supply pipes to the device, respectively;
These are connection joints to the sub burner 18 and the main burner 19, respectively.

Operation of the Example Device When the ignition operating shaft 6 begins to rotate from the stop position to the open position, the electromagnetic safety valve 1 is first opened as the cam 7 rotates.

Subsequently, the switch SW1 is switched to the side that discharges the capacitor 3, and a discharge current flows to forcibly open the electromagnetic safety valve 1 and forcefully close the electromagnetic main valve 4.

When the ignition operating shaft 6 reaches the 90° rotated position,
SW2 to switch the capacitor 12 to the discharge circuit
operates and supplies power with the igniter 13 of the sub-burner 18, and at the same time, the pilot valve 5 for the sub-burner
is opened by the cam 9, and the sub-burner 18 is ignited.

At this point, the safety valve 1 loses the mechanical opening support force of the cam 7, but the forced open state continues to be maintained by the electromagnetic action force based on the discharge current of the capacitor 3 instead. When the ignition operating shaft 6 reaches the open position, the attraction force of the electromagnetic main valve 4 due to the discharge current through the capacitor 3 weakens, and the cam 8 brings the valve into the open state.

On the other hand, when SW2 switches the contact on the side that discharges the capacitor 12, the relay 14 is activated.
The contact 15 interposed in the power supply circuit of the igniter 13 is closed, and the contact 16 interposed in the power supply circuit from the capacitor 3 to the electromagnetic safety valve 1 and the electromagnetic main valve 4, which is in an interlocking relationship with this contact 15, is also closed. The auxiliary burner 18 is ignited, and the electromotive force of the thermocouple 2 is maintained.

By the way, since the relay 14 has its own predetermined activation current, if the capacitor 12 gradually discharges, the relay 14 will run out of supplied power and lose its attractive force before it is completely discharged. By opening both the contacts 15 and 16, the discharge circuit of the two capacitors 12 and 3 is opened, thereby preventing both capacitors from continuing to discharge unnecessarily.

[Brief explanation of the drawing]

Fig. 1 is an electrical circuit diagram of the device of the present invention, Fig. 2 is a conceptual diagram of the arrangement of the main components of the device, Fig. 3 is an operation time chart of the main components, and Fig. 4 is a diagram showing the rotational operation of the ignition operating shaft. A front view of the described knob, and FIGS. 5 to 8 are a cross-sectional view of the device, a side sectional view at the A-A position, a side sectional view at the B-B position, respectively.
and a side view. In the figure, 1...electromagnetic safety valve, 2...thermocouple, 3...
...Capacitor (first capacitor), 4...Solenoid main valve, 11...Battery, 12...Capacitor (second capacitor), 13...Igniter, 14...
Relay, 15...make contact (first make contact),
16...Make contact (second make contact), 18...
...Sub burner, 19...Main burner, SW1
...Switch (first switch), SW2...Switch (second switch).

Claims (1)

[Scope of Claim for Utility Model Registration] A first switch for charging a first capacitor electrically connected to a fulcrum with a battery electrically connected to a charging contact; a second switch connected to the first switch and connected to the fulcrum; A second switch electrically connects a capacitor with the battery to the charging side contact and a relay to the discharging side contact, an electromagnetic safety valve that opens when energized, and a second switch that is arranged between the safety valve and the main burner and when energized. It has a solenoid main valve that closes, and only the solenoid safety valve is energized by the electromotive force of the thermocouple facing the sub-burner.
A valve circuit that excites both an electromagnetic safety valve and an electromagnetic main valve with the discharge current of the first capacitor, and an igniter that ignites a sub-burner provided downstream of the electromagnetic safety valve, and the first make of the relay Combustion control of a gas appliance, in which the valve circuit and the discharge side contact of the first switch are electrically connected through a contact, and the igniter and a battery are electrically connected through a second make contact of the relay. Device.