| 摘要 |
PROBLEM TO BE SOLVED: To provide a temperature controller for PTC heater which can control to a prescribed heater temperature easily, without using a temperature sensor for directly detecting the temperature, and from the start of switching-on to even after reaching a prescribed temperature. SOLUTION: The temperature controller 1 for PTC heater is provided with a current sensor 13 for detecting current value flowing to a PTC heater 3, and performs control to change the ratio of switching-on and switching-off time according to the current value detected. The prescribed control is carried out by deviation from the current value specified according to the desired heater temperature established beforehand. COPYRIGHT: (C)2006,JPO&NCIPI
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