| 摘要 |
PROBLEM TO BE SOLVED: To provide a combined type fire alarm for preventing erroneous report, and for announcing fire alarm in an early stage. SOLUTION: This combined type fire alarm is provided with: a smoke detection part for detecting smoke; a CO detection part for detecting CO; and a control part for measuring a storage time T1 when smoke density based on output detected by the smoke detection part turned to an alarm level as the reference of fire alarm or more, and for controlling the fire alarm issue fire alarm after the lapse of the storage time T1 when the smoke density which is the alarm level or more is continuously detected by the smoke detection part during the lapse of the storage time T1. The control part issues fire alarm in the more early stage than the case that the storage time T passes when CO density based on the output detected by the CO detection part reaches the predetermined density or more during the measurement of the storage time T1. COPYRIGHT: (C)2008,JPO&INPIT |
