| 摘要 |
PURPOSE:To improve the safety by a method wherein a light emitting device and a light receiving device are furnished near the front face of a stove, and a change in the signal of the light emitting device brings an alarming device into action and stops a heating device. CONSTITUTION:A guard 7, a light emitting device 9, a reflecting device 10, and a light receiving device 11 are furnished on the front face of a stove 8. In this constitution, the light emitted by the light emitting device 9 is reflected by the reflecting device 10, and received by the light receiving device 11, and a light receiving signal is input to a control device 13. The number of light pulses, that is transmitted from the light receiving device, is counted and compared with the set value by the control device 13 at regular time intervals. When the counted value < the set value, an alarming device 14 is brought into action to deliver an alarm and stop heating of a heating device 15. By this constitution, the safety can be improved. |
