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
Application
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
IPC 8 full level
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)
- [XA] DE 2407772 A1 19750911 - BARTELS WILLY
- [A] US 4978292 A 19901218 - DONNELLY DONALD E [US], et al
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