HEATING DEVICE, FIXING DEVICE USING IT, AND IMAGE FORMATION DEVICE USING THE FIXING DEVICE

摘要

PROBLEM TO BE SOLVED: To efficiently use an electric storage device and to extend its service life when a heating device having the electric storage device as an auxiliary power source is used for a fixing device of an image formation device or the like.

SOLUTION: A heating part 2 is provided with a main heating element 2a and an auxiliary heating element 2b, and power is fed to the main heating element 2a from a main power supply device 3 and to the auxiliary heating element 2b from an auxiliary power supply device 4 using the capacitor C. Power is fed to the auxiliary heating element 2b from the capacitor C. When it is determined that the temperature of the heating part can be kept without heating by the auxiliary heating element, an auxiliary power control means 8 lowers a set temperature for starting power feed to the auxiliary heating element 2b. A discharge control part 8b for varying voltage capable of starting power feedable voltage to the auxiliary heating element of the auxiliary power supply device 4 is formed.

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