| 摘要 |
PURPOSE:To obtain an inexpensive safety device capable of securing safety of overheating upon cooling ''tempura'' or the like and detecting blow out of flame by the same controller by a method wherein an electronic circuit is equipped in the device and a solenoid valve is excited by the oscillating output of the comparator of a thermocouple and a heat sensitive element. CONSTITUTION:When the thermocouple 5 is heated by the flame, the oscillating output, obtained by the generation of thermoelectromotive force, is transmitted to ''tempura'' overheat detectors 24-28. The heat sensitive element 4 transmits the oscillation by the comparator 29 when temperature is lower than the ignition temperature of ''tempura'' oil but transmits the oscillation thereof when the temperature becomes higher than the ignition temperature of the same. when there is combustion flame, the oscillating output oscillates a transformer 30 to hold the opening of the solenoid valve 2 after rectifying the output by a diode 31 and a capacitor 32 in case the temperature of the ''tempura'' oil is lower than 250 deg.C, however, the transformer 30 is not oscillated, the solenoid valve 2 is not held opened and the trouble of the device may be prevented when the blow out of the flame is happened or the temperature of ''tempura'' oil has become higher than 250 deg.C. |
