| 摘要 |
PURPOSE:To enable remote control without a temperature-sensitive element by adjusting the feeding time of electricity while detecting the change in the on-load resistance value of an electric heating body and thereby performing the control of temperature. CONSTITUTION:When electricity is fed from a power source AC to a temperature controlling device (b), a timer D1 of an electronic circuit D operates to feed and heat the heating body (a). By the timer circuit D1, a relay circuit D2 is operated to turn a switch C on and off. When the AC power source to the heating body (a) is off, the heating body (a) is connected to the electronic circuit D through the intermediary of the switch C and the changed value of on-load resistance of the heating body (a) is read directly by an electricity-detecting comparison circuit D3. According to this value, the feeding of the heating body (a) is controlled and thus the control of temperature is performed. |
