JPS60213736A - Igniter - Google Patents

Abstract

PURPOSE:To constitute the titled igniter so that gas is released under a sparking state wherein it is sufficient for ignition, by detecting ignition power and a cycle. CONSTITUTION:The titled igniter possesses a spark detector 16 detecting a state of a spark through a high-tension coil and a discharge electrode and deciding a spark cycle through a one-shot multivibrator 18. With this construction, a sparking state is discriminated by detecting power of the spark to be generated from a discharge electrode 13 as ignition energy by both a spark cycle and voltage of the spark and comparing working time of the one-shot multivibrator 18 and the measured spark cycle. Then a solenoid valve 15 is opened only when the power is normal. Then the titled burner is safe even if it is affected by rain water or trouble is generated on a high-tension cable and ignition can be performed reliably.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ignition device for checking ignition performance and eliminating explosive ignition.

Conventional Structures and Problems Conventionally, ignition devices in which ignition and gas supply are simply disconnected in a seeded manner have been mainstream. As a result, unfortunately
When the ignition energy decreases (leakage of spark power due to rain, etc.), there is an inherent risk of explosive ignition due to ignition delay, etc.

In addition, as an improved ignition system, a method has been proposed that opens the gas valve after detecting the ignition power. Although this method is considerably improved compared to the conventional method, it still has the following problems. This has not been solved.For example, when the high EE2-pull for ignition gets wet due to rain, etc., and the spark leaks from the r-pull, the spark cycle often becomes intermittent.This fact is one of the Even if a spark is detected, the gas valve is opened, and gas is supplied, the next spark will escape, and as a result, there is a possibility of explosion and ignition due to ignition delay.

OBJECTS OF THE INVENTION An object of the present invention is to provide an ignition device that detects the ignition power and cycle and opens the gas when the spark is sufficient for ignition.

Structure of the Invention The present invention is characterized by employing a spark detector that detects the state of the spark caused by the high-voltage coil and discharge electrode of the igniter and determines the spark cycle in one shot and multiple ways.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a system diagram of an embodiment of the present invention. 1
2 is a power supply switch that closes when the appliance starts operating and burns, and also serves as a combustion start command.

3 is a combustion controller, and 4 is an igniter, which is composed of a diode 56, a resistor 7, a capacitor 8 for storing ignition energy, a coil 9 for ignition, and a switch element 10 that breaks down at a constant voltage (VBO). 11 is an ignition switch, 12 is a high-voltage cable, 13 is a discharge electrode, 14 is a burner, 15 is a solenoid valve, 16 is a snow leakage detector, and a spark detection unit 17
It consists of 18 one-shot multis. Note that 19 is an LED
20 is a capture diode.

The operation shown in FIG. 1 will be explained in detail with reference to the operation waveform diagrams shown in FIGS. 2 and 3.

The present invention consists of an electronic timer that uses an oscillation system to operate safely even in the event of a component failure, in place of the time cut-off using a conventional mechanical timer, and provides convenient operability and display for the convenience of consumers. The aim is to provide convenience and safety to the public.

The present invention uses a digital timer as a timer for several hours, and uses a safety valve as a gas cutoff valve. This is a game shutoff device that uses an electronic timer with a remaining time display that allows for easy time setting, and also incorporates a start-up inspection system when the device is in use.

FIG. 1 is an external view of a gas staple incorporating an electronic timer, which is an embodiment of the present invention.

First, normal operation will be explained based on FIG. 2.

Power switch 2 is turned on at time ta. The combustion controller 3 is activated and the ignition switch 11 is turned on.

The igniter 4 is connected to a capacitor 8 via a diode 5 and a resistor 7.
is being charged. Voltage Vc of capacitor 8 at time tb
However, since the breakdown voltage vBo of the switching element 10 also reaches Vc>VBQ, the switching element 10 becomes conductive, and the electric charge of the capacitor 8 is discharged to the primary side of the ignition coil of the switching element 10, and the secondary side of the coil Generates a high pressure spark on the side. Next, at time t'c, the above state occurs again and a spark is generated, and these steps are repeated. The spark detector 16 detects the actual spark power flowing through the high-voltage coil - high-voltage double - discharge electrode - burner - earth - LED, etc. - the high-voltage coil with a detection unit 17 , guides it to the one-shot multi 18 , and detects the spark period. Measure time T.

FIG. 3 shows the detailed operation of the spark detector 16 during normal operation corresponding to FIG. 2. In the figure, time tb
The one-shot multi is set by the first spark generated, and becomes inoperable after the specified time TM. Since the next spark is generated at time tb within this TM time, the 7M output and the spark output are detected by an AND gate, and the flip-flop F/F is set to detect the spark. In other words, as shown in FIG. Open it and ignite the gas.

Next, the ignition energy generated from the discharge electrode 13 is reduced, for example, when the high voltage r-pull 12 in FIG.
When the spark power decreases due to leakage from the discharge electrode 13, not all of the ignition energy reaches the discharge electrode 13 and the discharge voltage decreases, resulting in intermittent sparking in many cases. This state is shown in the operating waveforms of FIGS. 2 and 3. As shown in FIG. 2, sparks should fly at intervals of period TX at times tb, tc, and td, but if the sparks fly at intervals of period TX at time tc.
When the spark does not fly (passes out), the period is extended to 77. As a result, as shown in FIG. 3, since 'ry>'rM from the time TM of the one-shot multi 18, the gate is inactive, the flip-flop is not set, and the spark detector 16 does not operate.

Therefore, the combustion controller 3 does not open the stain valve 15 and gas is not supplied. If the high-pressure diples etc. return to normal,
Or, if the cause of the abnormality is removed, normal operation will be restored.

Although the LED 19 and the like have been described as the spark state detection unit 17, it is natural that a neon lamp or the like can be used instead and the light emission can be used to detect the spark state.

Effect of the invention According to the present invention, the following effects are obtained.

(1) The power of the spark generated by the discharge electrode as ignition energy is detected by both the spark cycle and the voltage, and the solenoid valve is opened only when the power is normal, so it can be used to detect rainwater, etc.
Even if trouble occurs in the high-pressure double, it is safe and ignition can be performed reliably.

(2) This method compares the one-shot multi-operation time TM set by the first spark with the actual spark period T, and the spark state can be identified easily and reliably.

(■ High-voltage spark state is guided by optical coupling such as LED and detected in an insulated type, which prevents electrical damage to the human body such as unnecessary electric shock.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an embodiment of the present invention, FIG. 2 is an operating wave diagram, and FIG. 3 is an operating waveform diagram. 2...Power switch, 3...Combustion controller, 4...
...Igniter, 15...Solenoid valve, 16 -Spark detector, 18...One-shot multi. Name of agent Patent attorney Toshio Nakao and 1 other person 2 Figures

Claims (1)

[Claims] (1) Equipped with a burner, a solenoid valve, an igniter, a discharge electrode that is installed opposite to the burner and generates a spark, a spark detector that detects the spark state, and a combustion controller that controls the solenoid valve, etc., The spark detector is configured to be set by the first spark after a combustion start command, and to detect that subsequent sparks occur within a specified period and output an output.The spark detector receives input to the combustion controller and drives the solenoid valve. Ignition device configured. ((2) A one-shot multi is used as a means to set the first spark and measure subsequent spark cycles,
The ignition device according to claim 1(d), which is a spark detector that compares the one-shot multi-operation time with the spark cycle time and generates an output. (j) The ignition device according to claim 1, wherein the means for detecting the spark state is a spark detector that inputs the discharge energy of the spark state through optical coupling such as an LED and a neon tube.