Global Patent Index - EP 1256763 A2

EP 1256763 A2 2002-11-13 - Method and device for long-term safe flame monitoring

Title (en)

Method and device for long-term safe flame monitoring

Title (de)

Langzeitsicheres Flammenüberwachungsverfahren und Überwachungsvorrichtung

Title (fr)

Procédé et dispositif de surveillance de flamme à sécurité de long terme

Publication

EP 1256763 A2 (DE)

Application

EP 02003787 A

Priority

DE 10123214 A

Abstract (en)

The method involves using a photo-conductive cell (6) which is connected to a two-channel monitoring circuit (7). The first channel (11) is for determining the average brightness and the second channel (12) is for monitoring variable components, i.e. flame flickering. The flame is only classed as normal when both output channels have values lying within given limits. An Independent claim is also given for a monitoring device.

Abstract (de)

Eine Überwachungseinrichtung (1), die insbesondere zur Flammenüberwachung an ölbetriebenen Gebläsebrennern vorgesehen ist, weist einen Fotowiderstand (6) auf, der an einer Überwachungsschaltung (7) angeschlossen ist. Diese wertet das von dem Fotowiderstand (6) abgegebene Signal zweikanalig aus. Ein erster Kanal (11) dient zur Erfassung der mittleren Helligkeit. Ein zweiter Kanal (12) dient zur Erfassung von Wechselanteilen, die von Flackern der Flamme herrühren. Die Flamme wird nur dann als ordnungsgemäß brennend anerkannt, wenn an beiden Kanalausgängen der Kanäle (11, 12) ein Signal vorhanden ist, bzw. das Signal jeweils in einem vorgegebenen Bereich liegt. Auf diese Weise lassen sich insbesondere schleichende Änderungen der Charakteristik des Fotowiderstands, wie sie bei Brennerdauerbetrieb auftreten und gefährlich sind, erkennen. Es wird sichergestellt, dass die Flammenüberwachung nicht mit einem defekten Fotowiderstand vorgenommen oder versucht wird. <IMAGE>

IPC 1-7 (main, further and additional classification)

F23N 5/08

IPC 8 full level (invention and additional information)

F23N 5/08 (2006.01)

CPC (invention and additional information)

F23N 5/082 (2013.01); F23N 2029/08 (2013.01)

Designated contracting state (EPC)

DE FR IT

EPO simple patent family

EP 1256763 A2 20021113; EP 1256763 A3 20030730; EP 1256763 B1 20061108; DE 10123214 A1 20021128; DE 50208634 D1 20061221

INPADOC legal status


2013-06-28 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2012-01-12 [REG DE R119] APPLICATION DEEMED WITHDRAWN, OR IP RIGHT LAPSED, DUE TO NON-PAYMENT OF RENEWAL FEE

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2007-10-17 [26N] NO OPPOSITION FILED

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2007-03-23 [ET] FR: TRANSLATION FILED

2006-12-21 [REF] CORRESPONDS TO:

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