CPC H05B 1/02 (2013.01) [G05D 23/00 (2013.01); G05D 23/1902 (2013.01); G05B 6/02 (2013.01); H05B 1/023 (2013.01); H05B 2203/035 (2013.01)] | 8 Claims |
1. A heating device that includes a heater configured to heat an item, a temperature detection unit configured to detect a temperature of the item heated, and a temperature adjustment unit configured to control the heater on the basis of a detected value of the temperature detection unit and a target temperature so that the temperature of the item heated reaches the target temperature, the heating device comprising:
a system gain change rate calculation unit configured to obtain a temperature increase value of the item heated from the detected value of the temperature detection unit, obtain a system gain, which is a ratio of the temperature increase value of the item heated with respect to electric power inputted to the heater, and obtain, as a system gain change rate, a rate of change from an initial value of the system gain; and
a heat retention change rate calculation unit configured to obtain a rate of change in heat retention of the item heated from the system gain change rate.
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