| 摘要 |
PROBLEM TO BE SOLVED: To provide an indoor abnormality monitoring system for early performing a fire alarm even if a fire is a fire wherein it takes a time for a smoke density to begin to increase after ignition in a smoldering fashion. SOLUTION: A controller 11 distinguishes whether a gas appliance 8 is used or not from a gas flow rate supplied to the gas appliance 8 detected by a gas meter 6. The controller 11 performs the fire alarm when a CO density detected by a CO sensor 9 increases successively for a prescribed time or above while distinguishing that the gas appliance 8 is not used. COPYRIGHT: (C)2010,JPO&INPIT
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