| 摘要 |
PROBLEM TO BE SOLVED: To provide a control unit for a small-sized washer excellent in electric insulation state detection. SOLUTION: The control unit 1 for a dishwashing machine comprises a DC power circuit 9, a switching power circuit 10 that is a non-insulation control power circuit, an insulated control power circuit 13, a control circuit 11, a water leakage sensor circuit 2 that is a state-detection circuit and a transmission circuit 12. In the insulated operation power circuit 13 wherein a commercial power is converted to a DC power by the DC power circuit 9 and two control powers having different voltages are generated from the DC power by the switching power circuit 10, an operating power insulated from the DC power is generated from one of the control powers by driving a pulse transformer based on a high-frequency pulse signal, and the water leakage sensor circuit 2 is so configured as to be driven by this operating power. |
