公开(公告)号：EP0944887A4

公开(公告)日：2001-08-16

申请号：EP97950817

申请日：1997-11-26

Applicant: SLC TECHNOLOGIES INC ,  ENGELHARD SENSOR TECHNOLOGIES

Inventor： MARMAN DOUGLAS H ,  PELTIER MARK A ,  WONG JACOB Y

IPC: G08B17/10 ,  G08B17/117 ,  G08B29/16 ,  G08B29/18 ,  G08B29/20 ,  G08B17/107

CPC classification number: G08B17/10 ,  G08B17/113 ,  G08B17/117 ,  G08B29/16 ,  G08B29/183 ,  G08B29/20

Abstract: A fire detection system (100) combines a CO2 gas detector (14) with a smoke detector (2). Logic circuitry (400) combines the outputs of both detectors to minimize false alarms and provide a rapid response time. In a preferred embodiment the need for periodic cleaning is reduced. In a further preferred embodiment, two alarms indicative of two different types of fires, for example flaming fires and nonflaming fires are available. A map (810) of flaming fire and smoke may be assembled by the system to guide the firefighters. In a yet another preferred embodiment, a tentative fire alarm indication (222, 233) disables a local air conditioning system thereby helping to isolate and control any existing fire.