JPH022050B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combustion control device for a gas combustion appliance.

[Prior art] Gas-burning appliances used by the general public, such as gas bath kettles and gas instantaneous water heaters, are designed with great care to prevent raw gas from being generated due to operational errors or device failures. is being carried out. For example, a normally closed electromagnetic safety valve is configured to be kept open using the electromotive force of a thermocouple heated by a sub-burner, and immediately after the sub-burner is ignited, power is supplied for a limited time via a capacitor. A method of relying on a power source to keep a safety valve open is becoming more popular. In this type of gas appliance, the igniter of the sub-burner is often operated by a timed power supply circuit using a capacitor as a timer, so when installing gas combustion appliances, the air in the pipes must be purged. In this case, the opening and closing operations of the valves of the appliances were hindered by the timed valve opening function of the capacitor and could not be performed freely, resulting in the inconvenience of making this air purge work time-consuming.

On the other hand, if the operating time of the auxiliary burner igniter is shorter than the opening time of the electromagnetic safety valve, raw gas may be released from the auxiliary burner.

[Technical Issues] As explained in the section on prior art, there is a type of combustion control device in which the electromagnetic safety valve and the auxiliary burner igniter are activated only for a certain limited period of time using a DC power source or the like via a capacitor. When installing a gas combustion appliance that incorporates an air purge to expel air from the piping, the operation of opening and closing the valve of the appliance to release the air is hindered by the timed operation function of the condenser. Therefore, it is an object of the present invention to devise a method for solving this inconvenience. In addition, in a gas combustion control device that has a built-in power source for operating the device and has a built-in timer function using a capacitor,
It is also an incidental object of the present invention to take measures to prevent the danger of live gas release in the event that the igniter is activated for a shorter time than the safety valve is opened.

[Technical Means] The configuration of the present invention will be explained below with reference to FIG. 1, which is an electrical circuit diagram for operating the device, while referring to FIG. 2, which is a conceptual diagram of the arrangement of the main components of the device of the present invention. .

This is a type in which the electromagnetic safety valve 1 provided at the gas introduction part to the device is held open by the electromotive force of the thermocouple 2 heated by the sub-burner 18. Immediately after the ignition of the sub-burner 18 starts, the electromagnetic safety valve 1 1 is a combustion control device in which an igniter 13 of an auxiliary burner is operated in a timed manner by a separate power source 11 via a first capacitor 3 and a separate power source 11 via a second capacitor 12, and the electromagnetic safety valve 1 and The igniter 13 is connected to a timed operation circuit D and a second capacitor 1, each using the first capacitor 3 as a timer.
2 as a timer, without going through the timed operation circuit E.
As additional circuits for direct operation by the battery power source 11, there are a direct ignition circuit B with an intermediate switch 16b interposed therebetween, and a bypass switch 16 provided at the inlet of the timed operation circuit D of the electromagnetic safety valve.
A direct valve opening circuit A is branched from the circuit A and connected to the circuit B described above. and two switches 16a
and 16b are placed in an interlocking relationship.

Further, the igniter time-limited circuit E includes a relay 14 and its contacts 15 that operate only during the time when the second capacitor 12 is charged.
The capacitances of capacitors 3 and 12 are set to be longer than time limit circuit D for electromagnetic safety valve.

[Function] Based on FIGS. 1 and 2 shown in the technical means section, the operation of the device of the present invention will be explained below. When newly installing a gas combustion appliance, the piping is Air purge work is performed to expel the air inside the unit, but at this time, the first thing to do is to remove the power supply battery 1.
After setting a new one that has sufficiently stored electromotive force as 1, and turning on the interlocking switches 16a and 16b for air purge work, the power supply current flows through the direct valve opening circuit A and the direct ignition circuit B to the timed operation circuits D and 16b. Solenoid safety valve 1 directly without going through E.
Since the air is supplied to the igniter 13, the inconvenience that makes the air purge operation time-consuming as explained in the conventional technology section is eliminated.

On the other hand, as another method for achieving the object of the present invention, the interlocking relationship between the interlocking switches 16a and 16b is cut off, so that the switch 16b is opened and the switch 16 is closed.
By switching the direct valve opening circuit A to the closing contact side, the electromagnetic safety valve is opened by the current flowing through the igniter timed operation circuit E, which has a longer operating time than the electromagnetic safety valve timed operation circuit D. Since it can be held, it is possible to simplify the switching operation and the switching mechanism for cutting and cutting the current when performing air purge work.

[Example] A supplementary explanation will be given with respect to FIG. 2 which is a conceptual diagram of the components of the apparatus described above. 5 is a pilot valve of the sub-burner 18, 17 is a discharge part of the igniter 13, and 19 is a main burner.

Further, in FIG. 5 as a cross-sectional view of the device of the present invention, FIGS. 6 and 7 as side sectional views of two parts of the device, and FIG. 8 as a side view, 20 is a casing of the device; 6 is the ignition operation axis,
7, 8, 9 and 10 are electromagnetic safety valves 1,
Solenoid main valve 4, pilot valve 5, and SW
This is a cam for operating SW1 and SW2, and is fixed to the ignition operating shaft. 21 and 22 are electromagnetic safety valves 1,
These are the solenoids for the electromagnetic main valve 4. 23 and 24 are pressure rods for transmitting the functions of cams 7 and 8 to valves 1 and 4, respectively;
Reference numerals 2 and 33 designate a group of springs that serve as assistants to constantly operate the press rods 23 and 24 in conjunction with the cams and valve bodies located at both ends of each. Reference numerals 27 and 28 are a pressure rod for the pilot valve 5 and a spring for closing the valve, and 29, 30 and 31 are gas supply pipes to the apparatus, and joints for connection to the auxiliary burner and the main burner, respectively.

FIG. 3 is a time chart showing the sequence in which the main components of the device operate as the ignition operating shaft rotates.
When rotating from the stop to the open position, first,
The electromagnetic safety valve 1 is opened by the action of the cam, and then the switch SW1 is switched to the electromagnetic valve activation side contact, and the electromotive force of the thermocouple 2 is activated for a limited time by the timer function of the capacitor 3. Only until the voltage reaches a sufficient level, a current is applied from the power source battery 11 to keep the electromagnetic safety valve 1 open and to keep the electromagnetic main valve 4 closed. When the ignition operating shaft 6 reaches a position rotated by approximately 90°, the cam 7
As the electromagnetic safety valve 1 rotates, the electromagnetic safety valve 1 tries to close again by the force of the attached spring, but the above-mentioned electromagnetic action force continues to maintain the valve open state. At this point, the pilot valve 5 is also opened by the cam 9, and at the same time, the switch SW2 is opened by the cam 10.
The circuit is switched to operate the igniter 13, and the sub-burner is ignited.

FIG. 4 is a front view of the operating shaft knob for showing the rotation range of the ignition operating shaft 6. FIG.

[Effects of the Invention] The combustion control device of the present invention having the above configuration has the following features:
It has the following effects.

(b) When installing a new gas combustion appliance, when performing an air purge to expel the air in the piping and ignite it for the first time, an electromagnetic safety valve or igniter is equipped with a timed activation device that utilizes the discharge characteristics of a capacitor. In contrast, the device of the present invention operates the electromagnetic safety valve and igniter directly from the battery power only during air purge work. The above-mentioned disadvantages are solved by providing an additional circuit through which a current can flow.

(b) The timed activation time of the igniter is set longer than the timed activation time of the safety valve, and a circuit is installed to keep the electromagnetic safety valve open during the extended igniter activation time. Even so, it is possible to simplify the switching operation and the switching mechanism for interrupting the current during air purge work.

[Brief explanation of drawings]

Fig. 1 is an electrical circuit diagram for operation of the combustion control device according to the present invention, Fig. 2 is a conceptual layout diagram of the main components of the device, Fig. 3 is an operation time chart of the main components, and Fig. 4 is an ignition operation. The knob front view showing the rotation range of the shaft knob, and FIGS. 5 to 8 are a cross-sectional view of the device, a side sectional view of two locations, and a side view, respectively. In the diagram 1... Solenoid safety valve, 2... Thermocouple, 3...
First capacitor, 11...Power battery, 12...Second capacitor, 13...Igniter, 14...Relay, 15...Relay contact, 16a...2 contact switch, 16b...Intermediate switch.

Claims (1)

[Claims] 1 This is a type in which an electromagnetic safety valve provided at the gas introduction part to the device is held open by the electromotive force of a thermocouple facing the sub-burner. The safety valve is operated in a timed manner by a separate power supply via a first capacitor, and the igniter of the sub-burner is operated in a timed manner by a separate power supply via a second capacitor, wherein the electromagnetic safety valve and the igniter are connected to the first and A combustion control device characterized in that it is equipped with a circuit for operating from a separate power source without using a second capacitor. 2 This is a type in which the electromagnetic safety valve installed at the gas inlet to the device is held open by the electromotive force of a thermocouple facing the sub-burner. Immediately after the sub-burner starts igniting, the electromagnetic safety valve closes the first capacitor. and a secondary burner igniter is operated for a limited time by a separate power source via a second capacitor, and the operating time of the igniter is set longer than the opening time of the electromagnetic safety valve. A combustion control device further comprising a circuit for keeping the electromagnetic safety valve open during a regulation time controlled by the second capacitor.