| 摘要 |
PURPOSE:To improve the temperature detecting performance by applying a frequency lower than the commercial frequency to be applied to a heater to a temperature sensor of a polymer temperature-sensitive body. CONSTITUTION:A heat-sensitive heater line 6 is connected to a commercial power supply 10 via a relay 9. Then the relay 9 is driven to control temperature. The temperature of the line 6 is detected by a temperature sensor consisting of a polymer temperature-sensitive body via a wave detecting circuit 8 synchronous with an oscillator 7. Based on the result of this detection, the relay 9 is driven. In this case, the frequency of the oscillator 7 which is applied to a temperature sensor is set lower than the frequency of the supply 10. |
