| 摘要 |
PROBLEM TO BE SOLVED: To control temperature to maintain heating while reducing a quantity of maximum instantaneous power energy used by effecting an operation for controlling power supply to a heat source belonging to a predetermined first group, and an operation for controlling power supply to a heat source belonging to a predetermined second group, and repeating those operations once or more times. SOLUTION: A predetermined heat source out of heat sources belonging to a heating part 60 is set in a first group, and all or a part of the rest heating sources are set in a second group. In order to make a time of power supply for controlling temperature to each group not overlap with each other, a power input to the heat source that belongs to the second group is interrupted during a predetermined first time. After the lapse of the first time, a power input to the heat source that belongs to the first group is interrupted during a predetermined second time, and a power supply to a heat source that belongs to the second group is interrupted. After the lapse of the second time, a power supply to the power source that belongs to the first group is controlled again, and the first time and second time are repeated as a cycle. |
