Global Patent Index - EP 0863368 A3

EP 0863368 A3 20000419 - Flame monitoring circuit for a burner with a glow ignitor

Title (en)

Flame monitoring circuit for a burner with a glow ignitor

Title (de)

Flammenüberwachungsschaltung für einen Brenner mit Glühzünder

Title (fr)

Circuit de surveillance de flamme pour un brûleur avec allumage à incandescence

Publication

EP 0863368 A3 20000419 (DE)

Application

EP 98103582 A 19980302

Priority

DE 19709091 A 19970306

Abstract (en)

[origin: DE19709091C1] The circuit uses the temperature-dependent resistance variation in a glow plug (GL) for indicating the presence of the flame. The glow plug is inserted in a self-balancing bridge circuit (R1,R2,R3,GL), with the size of the current required for balancing the current through the glow plug used as the flame indication signal. The bridge circuit may be coupled to the current supply lines (PS1,PS2) via a controlled resistance (Q), controlled by the voltage across the bridge diagonal.

IPC 1-7

F23N 5/14; F23Q 7/12

IPC 8 full level

F23N 5/14 (2006.01); F23Q 7/12 (2006.01)

CPC (source: EP)

F23N 5/143 (2013.01); F23Q 7/12 (2013.01); F23N 2227/38 (2020.01); F23N 2229/00 (2020.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

DE 19709091 C1 19980514; EP 0863368 A2 19980909; EP 0863368 A3 20000419

DOCDB simple family (application)

DE 19709091 A 19970306; EP 98103582 A 19980302