Heizvorrichtung mit PTC-Thermistor

摘要

PCT No. PCT/JP93/00386 Sec. 371 Date Oct. 19, 1993 Sec. 102(e) Date Oct. 19, 1993 PCT Filed Mar. 29, 1993 PCT Pub. No. WO93/20670 PCT Pub. Date Oct. 14, 1993.A heat generator is formed to quickly raise the temperature of an object to be heated to a target level and then maintain the temperature of the object at the target level. The heat generator includes a high output heating element for heating the object to be heated, a temperature controller which is thermally coupled with the object and connected in series with the high output heating element for deenergizing the high output heating element when the temperature of the object exceeds the target level while energizing the high output heating element when the temperature of the object is reduced from the target level by a prescribed value, and a positive temperature coefficient thermistor which is thermally coupled with the object and connected in parallel with the high output heating element and the temperature controller, the thermistor having a Curie point set so as to produce an output capable of maintaining the object at the target temperature even when the high output heating element is deenergized.