| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire alarm capable of preventing erroneous alarm and corresponding to fire finding in an early stage by taking into consideration a user's life style. SOLUTION: The alarm having a fire occurrence detecting means 1a for detecting a fire occurrence on the basis of a comparison result between a fire sensor signal from a fire sensor 2 and a fire determination threshold for determining a fire, and a fire alarming means 6 for alarming the fire occurrence detected by the fire occurrence detecting means 1a comprises a gas sensor output acquiring means 1b for acquiring a gas sensor output from a gas sensor 3 driven so as to respond to a change in ambient temperature, a gas sensor output determining means 1c for determining whether a gas sensor output acquired by the gas sensor output acquiring means 1b is stable or not, and a fire determination threshold changing means 1d for changing the fire determination threshold on the basis of a determination result by the gas sensor output determining means 1c. COPYRIGHT: (C)2008,JPO&INPIT
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