| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved energy-saving image heating device by heating a toner image on a recording material without using a halogen heater or an infrared heater as a heat source, and to improve image quality by rapidly cooling the heated recording material. SOLUTION: The image heating device has a heating roller 11 heating the toner image on the recording material, and a cooler 16 cooling the heated recording material. The image heating device has a heat pump 50 performing heat exchange by a condenser 52 and an evaporator 54 while circulating a coolant in a compressor 51, the condenser 52, an expansion valve 53 and the evaporator 54. The condenser 52 is used for the heating roller 11 to exchange heat by circulating the coolant which is compressed by the compressor 51 and whose temperature is high in the heating roller 11. The evaporator 54 is used for the cooler 16 to exchange heat by circulating the coolant which is expanded by the expansion valve 53 and whose temperature is low in the cooler 16. COPYRIGHT: (C)2009,JPO&INPIT
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