| 摘要 |
PROBLEM TO BE SOLVED: To use an operation switch operated at first when cooking starts at an electric cell type cooking stove having many operation switches as a power supply switch.SOLUTION: There are provided two supply passages for operation voltage for operation switches SW1 to SW4 also acting as a power supply switch. The first supply passage is configured to be closed when no control power supply voltage is supplied to a microprocessor 1 and opened when a control power supply voltage is supplied to the microprocessor 1. A second supply passage is controlled for opening or closing by a scan control of the operation switch by the microprocessor 1. In addition, when the switches SW1 to SW4 are operated when no control power supply voltage is supplied to the microprocessor 1, the control power supply voltage for the microprocessor 1 is supplied by a detection signal based on an operating voltage supplied to the switches SW1 to SW4 through the first supply passage and the microprocessor 1 is energized.SELECTED DRAWING: Figure 1 |
