JPH0227344Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an automatic ignition circuit for a combustor such as an oil filler.

(Prior Art) In the past, ignition of a combustor was performed manually in multiple steps, which was a hassle.

(Problems to be Solved by the Invention) The present invention aims to solve the above-mentioned conventional problems and provide an automatic ignition circuit for a combustor that automatically ignites the combustor.

(Embodiment) The automatic ignition circuit for a combustor of the present invention (hereinafter referred to as the circuit of the present invention) will be described below according to an embodiment shown in the drawings.

FIG. 1 shows a combustor in which the circuit of the present invention is used. It has a pilot path c that branches off from the original path a and is connected to a pilot burner 2.

A compartment 20 is provided at the junction of the original passage a and the main passage b, and the compartment 20 is connected to the pilot passage c at a side port 21.

Further, the opening on the side of the main passage a of the compartment 20 is made openable and closable by the body 11 of the main valve 10.

The valve body 11 receives a force in the closing direction from a spring 12, and is maintained in an open state by a suction holding coil 13.

Next, the main passage b side opening of the compartment 20 is made openable and closable by the valve body 16 of the main passage cutoff valve 15.

The valve body 16 is attached to a shutoff valve rod 17 that can push the valve body 11 open.

A slow return device 18 is attached to the shutoff valve rod 17, and the slow return device 18 gently returns the pushed shutoff valve rod 17.

That is, in the illustrated embodiment, as shown in FIG.
has.

The piston 31 is provided with a hole 33 to accommodate the spring 3.
The shutoff valve rod 17, which has received the return force due to the force 2, is gently returned.

Next, the main passage b connected to the compartment 20 is opened and closed by the valve body 3a of the main valve 3 in the main passage b.

On the other hand, the pilot passage c connected to the port 21 of the compartment 20 can be opened and closed by the valve element 4a of the pilot valve 4 in the pilot passage c.

Further, the valve body 3a and the valve body 4a are attached to a main rod 9 which is moved forward and backward by a water flow detector 7.

The movement of the main rod 9 within a certain range is controlled by a transmission mechanism 14.
can be transmitted to the shutoff valve rod 17 via the valve rod 17, and can be released when the valve rod 17 is exceeded.

Also provided is a switch 24 which can be switched by the movement of the main rod 9.

The circuit of the present invention is now shown in FIG. 3, which includes an igniter 26 connected to a battery 23 via a relay switch 28.

Further, a capacitor 25 is provided which is alternately connected to the battery 23 and the coil 13 by switching the switch 24.

Next, a relay 27 is provided which is connected in parallel to the coil 13 and opens and closes the relay switch 28.

A thermocouple 29 heated by the pilot burner 2 is also provided, and the thermocouple 29 is connected to the coil 1.
Connected to 3.

The operation of the circuit of the present invention shown in the above embodiments will now be described.

That is, when using hot water, the user opens a faucet (not shown) and lets the water flow through the water flow detector 7.

As a result, as shown in FIG.
Both valve bodies 4a are opened.

On the other hand, the movement of the main rod 9 is transmitted to the shutoff valve rod 17 and pushes the shutoff valve rod 17.

As a result, the main passage b side opening of the compartment 20 is closed by the valve body 15 of the main passage cutoff valve 15, while the compartment 20
The opening on the side of the main path a is opened by the valve body 11 of the main valve 10.

For this purpose, source path a is connected via compartment 20 and port 21 to pilot path c. On the other hand, as the main rod 9 moves, the switch 24 is switched from the initial position shown in FIG.

As a result, the capacitor 25, which was charged in the battery 23 in the initial state, is connected to the coil 13 and starts discharging, thereby exciting the coil 13.

As a result, the coil 13 is pushed open by the valve body 11.
suction and hold to maintain its open state.

On the other hand, the shutoff valve rod 17 pushed in by the main rod 9 is released from the main rod 9 when it exceeds a certain range.

However, the shutoff valve rod 17 has a slow return device 1.
8 is attached, so it returns slowly.

That is, the valve body 16 of the main passage isolation valve 15 is not opened immediately, and therefore the main burner 1 is not immediately supplied with gas.

Next, by switching the switch 24, the capacitor 25 is also connected to the relay 27.

This energizes the relay 27 and switches the switch 28.
is closed and the igniter 26 is connected to the battery 23 to generate a spark.

For this reason, the main valve 10 and the pilot valve 4 are opened.
The pilot burner 2, which is connected to the gas supply source 5 via the gas supply source 5, is ignited.

The above-mentioned energization of the igniter 26 is performed only while the relay 27 is energized by the discharge of the capacitor 25, and is stopped when the current weakens due to the discharge, the relay 27 is demagnetized, and the relay switch 28 is opened.

Next, by igniting the pilot burner 2, the thermocouple 29 is heated and a thermoelectromotive force is generated. A current flows through the coil 13 due to the thermoelectromotive force, and the capacitor 25
The discharge of the current (which gradually weakens as described above) maintains the energized state of the coil 13 (although the thermoelectromotive force is not strong enough to energize the relay 27).

That is, the valve body 11 remains open and the pilot burner 2 continues combustion.

On the other hand, since the valve body 16 of the main passage isolation valve 15 is not immediately opened by the slow return device 18 as described above, the pilot burner 2 is ignited during this time.

Therefore, after the pilot burner 2 is ignited, the valve body 16 of the main passage cutoff valve 15 is opened.

As a result, gas is supplied from the gas supply source 5 to the main burner 1 via the main path a, the main valve 10, the compartment 20, and the main path b.

As a result, the main burner 1 is ignited by the flame of the pilot burner 2.

Next, when extinguishing the fire, the user closes the faucet to stop the water flow from the water flow detector 7.

As a result, both the main valve 3 and the pilot valve 4 are closed, and both the main burner 1 and the pilot burner 2 are extinguished.

As a result, the thermoelectromotive force of the thermocouple 29 disappears, the coil 13 is demagnetized, the main valve 10 is closed, and the initial state is restored.

(Effects of the invention) The embodiments of the automatic ignition circuit for a combustor of the invention are as described above, and the effects thereof are listed below.

(1) The circuit of the present invention has the configuration described in the claims for utility model registration, and in particular, because it has a capacitor, the valve body of the main valve is maintained in an open state until the thermocouple is heated. If you run water through it, it will automatically ignite smoothly.

(2) The circuit of the present invention has the same configuration as above, and in particular, the main burner is automatically ignited after the pilot burner is ignited because the main path cutoff valve is opened after the pilot burner is ignited by the slow return device.

[Brief explanation of drawings]

FIG. 1 is an overall view showing an embodiment of the present invention, FIG. 2 is a sectional view of a main part of FIG. 1, FIG. 3 is an overall circuit diagram, and FIG. 4 is a sectional view showing an operating state. 1... Main burner, 2... Pilot burner, 3... Main valve, 3a... Valve body, 4... Pilot valve, 4a... Valve body, 5... Gas supply source, 7...
Water flow detector, 8... Diaphragm, 9... Main rod, 10... Main valve, 11... Valve body, 12... Spring, 13... Coil, 14... Transmission mechanism, 15...
...Main passage isolation valve, 16... Valve body, 17... Shutoff valve rod, 18... Slow return device, 20... Compartment, 2
1... Port, 23... Battery, 24... Switch, 25... Capacitor, 26... Igniter, 27... Relay, 28... Relay switch,
29...Thermocouple, 30...Cylinder, 31...
Piston, 32...spring, 33...hole, a...original path, b...main path, c...pilot path.

Claims (1)

[Scope of utility model registration request] A main path that branches off from the source path, is connected to the main burner, and is opened and closed by the main valve, and a main path that branches off from a side port of the compartment at the junction of the source path and the main path, is connected to the pilot burner, and is opened and closed by the pilot valve. A main valve that opens and closes the main road side opening of the compartment, a main passage cutoff valve that opens and closes the main road side opening of the compartment, and a valve body of the main valve and a valve of the pilot valve by the movement of the water flow detector. a main rod that opens and closes the body; a shutoff valve rod to which the valve body of the main path cutoff valve is attached so that it can push open the valve body of the main valve and to which a certain range of movement of the main rod is transmitted; a switch that is switched by the movement of the rod; a capacitor that is alternately connected to a coil for attracting and holding the battery and the valve body of the main valve when the switch is switched; and an igniter that is connected to the battery via a relay switch; An automatic ignition circuit for a combustor, comprising a relay connected in parallel to the coil of the main valve to open and close the relay switch, and a slow return device mounted on the shutoff valve rod.