EP 1975896 B1 20100505 - Smoke detector and sampling air supplying method for smoke detector
Title (en)
Smoke detector and sampling air supplying method for smoke detector
Title (de)
Rauchdetektor und Probeluftversorgungsverfahren für den Rauchdetektor
Title (fr)
Détecteur de fumée et procédé de fourniture d'air d'échantillonnage pour le détecteur de fumée
Publication
Application
Priority
JP 2007091276 A 20070330
Abstract (en)
[origin: EP1975896A2] In order to enable supply of a sampling air to a smoke detection portion at a stable flow velocity, the present invention provides a smoke detector including: a black box (21) including a smoke detection portion (25) having an inflow port and an outflow port; a sampling pipe (30) laid in a monitor space; a gas flow pipe (P) connected to the sampling pipe and which houses a fan (3) therein; a flow path branching portion (33) provided to the gas flow pipe on a secondary side of the fan and connected to the inflow port of the smoke detection portion; and a flow path merging portion (32) which is provided to the gas flow pipe on the secondary side of the fan and connected to the outflow port of the smoke detection portion, and at which a pressure of a fluid flowing through the gas flow pipe is lower than a fluid flowing through the gas flow pipe at the flow path branching portion. Such pressure difference ensures that a constant flow rate is maintained in the smoke detection portion, thereby enabling a reliable smoke detection.
IPC 8 full level
G08B 17/10 (2006.01)
CPC (source: EP KR)
G08B 17/10 (2013.01 - EP KR); G08B 17/113 (2013.01 - EP KR)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 1975896 A2 20081001; EP 1975896 A3 20090318; EP 1975896 B1 20100505; AU 2008201308 A1 20081016; AU 2008201308 B2 20110728; CN 101275910 A 20081001; CN 101275910 B 20110608; DE 602008001120 D1 20100617; JP 2008250684 A 20081016; JP 4932567 B2 20120516; KR 101391550 B1 20140507; KR 20080089167 A 20081006; TW 200901093 A 20090101; TW I437513 B 20140511
DOCDB simple family (application)
EP 08251196 A 20080328; AU 2008201308 A 20080320; CN 200810084922 A 20080307; DE 602008001120 T 20080328; JP 2007091276 A 20070330; KR 20080017722 A 20080227; TW 97109372 A 20080317