| 摘要 |
PURPOSE:To secure safety for an accidental overheating cause by a method wherein a metal support is provided between the respective grills of a frame body in a heater utensil and a belt type heating body, which resistance increasing rate is increased rapidly in case of exceeding a given temperature, is fixed on the double direct surface of the support thereof. CONSTITUTION:The grills 2 are provided at the frame body 1 of KOTATSU and a foot warmer or the like and the metal supports 7 are provided between respective the grills while the belt type heating body 8 is fixed on the double direct surface of the support thereof. In the case a heat dessipation is intercepted by closing of an inlet port 5 due to covering of a blanket or the like on the grills 2, the temperature of the heating body 8 is risen and the resistance value is increased extremly, therefore, the electric consumption is reduced automatically and the temperature ascending may be kept in low. And a heat shielding plate or the like becomes unnecessary, therefore, it may be thinned. |
