JPS5592821A - Combustion safety device - Google Patents

Abstract

PURPOSE:To detect whether burning flame is normal or abnormal and secure the safety of its combustion by closing a solenoid safety valve at its abnormal time by bringing the burning flame into contact with one electrode surface of a combustion sensor to thereby heat the electrode and bringing the combustion exhaust gas into contact with the other electrode surface thereof. CONSTITUTION:In case that a knob 17a of a push and turn type plug 17 is depressed when using a gas equipment, a solenoid safety valve 18 is opened. When the knob 17a is then turned, the plug 17 is opened to this ignite an ignition plug 22. Thus, an ignition flame burner 20 is ignited to thereby form an ignition flame F. Then, a main burner 15 is ignited to thereby form a main combustion flame F'. The ignition flame F heats the electrode surface 14 on the outer periphery of a combustion sensor 11 at this time. When exhaust gas P2 from the combustion flame F' passes through the inner hole of the sensor 11, the gas P2 makes contact with the electrode surface 13 on the inner periphery of the sensor 11. The electromotive force of the sensor 11 at this time continuously open the solenoid safety valve 18 continuously opened upon discharge of a capacitor 24 at its initial ignition time.