EP 2320397 A1 20110511 - Fire sensor and method for detecting fire
Title (en)
Fire sensor and method for detecting fire
Title (de)
Brandsensor und Verfahren zur Erkennung von Bränden
Title (fr)
Capteur d'incendie et procédé de détection de feu
Publication
Application
Priority
EP 09174290 A 20091028
Abstract (en)
A fire sensor is disclosed for detecting fire in a monitored region. The fire sensor comprises: a chamber in fluid communication with the monitored region via at least one inlet; an internal detector assembly adapted to detect fire products within the chamber and to output a corresponding internal detection signal; an external detector assembly adapted to detect fire products outside the chamber in the monitored region and to output a corresponding external detection signal; a fluid transport device, such as a fan, adapted to draw a sample of the atmosphere from the monitored region into the chamber through the at least one inlet; and a controller adapted to activate the fluid transport device upon receipt of a trigger signal based on the external detection signal to thereby draw a sample of the atmosphere from the monitored region into the chamber for analysis by the internal detector assembly. Also provided is a corresponding fire detection system and method of detecting fire. The dual detection system is less subject to false alarms than a mere external chamber fire sensor, since the alarm situations detected by the external detector activate a verification of the fire event by the second, internal detector. Also, the fan is active only intermittently, thereby consuming less energy than a mere internal chamber fire sensor, while maintaining its reliability.
IPC 8 full level
G08B 17/10 (2006.01); G08B 29/18 (2006.01)
CPC (source: EP)
G08B 17/10 (2013.01); G08B 17/113 (2013.01); G08B 25/002 (2013.01); G08B 29/183 (2013.01); G08B 29/24 (2013.01)
Citation (search report)
- [A] US 2003020617 A1 20030130 - TICE LEE D [US], et al
- [A] DE 102006055617 A1 20080529 - FUNA GMBH [DE]
- [A] EP 1768074 A1 20070328 - SIEMENS SCHWEIZ AG [CH]
- [A] EP 1492070 A2 20041229 - ROSEMOUNT AEROSPACE INC [US]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2320397 A1 20110511; EP 2320397 B1 20120523; CN 102054322 A 20110511; CN 102054322 B 20150225
DOCDB simple family (application)
EP 09174290 A 20091028; CN 201010525834 A 20101027