| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas shutoff device to shut off gas using an electromagnetic valve which does not require a shut-off valve equivalent resistance and a shut-off valve equivalent resistance actuating circuit, enables to reduce costs by decreasing the number of parts and the cost for instillation, and enables to detect voltage of a battery with high precision. SOLUTION: The gas shutoff device comprises a battery 6 as a power source, an electromagnetic valve 4, a control unit 5, an electromagnetic valve driving circuit 7 and a voltage detecting circuit 8. The electromagnetic valve driving circuit 7 is to drive the electromagnetic valve 4 to shut off a gas path 3 and controlled by the control unit 5. The voltage detecting circuit 8 detects the voltage drop of the battery 6 when operating the electromagnetic valve driving circuit 7 and informs it to the control unit 5. COPYRIGHT: (C)2005,JPO&NCIPI
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