| 摘要 |
PROBLEM TO BE SOLVED: To achieve the same heated temperature by an adjustment to extend a heating time, even if a high frequency output is lowered by an increase in a cumulative operating time. SOLUTION: A control circuit 2 computes a simple heating time in accordance with a weight information measured by a weigher 3, compensates the straight heating time to a longer real heating time in accordance with a cumulative operating time of a high frequency generating source 5 stored in a memory circuit, connects the high frequency generating source 5 to a commercial power supply 1 by driving a relay during the real heating time, computes the latest cumulative operating time by adding the real heating time obtained by the compensation to the cumulative operating time stored, in the memory circuit, and newly resisters the latest cumulative operating time in the memory circuit. Thereby, food can be finished always at the same temperature even if the high frequency generating source is deteriorated.
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