EP 0508081 A3 19930203 - CIRCUIT AND METHOD FOR MONITORING A FUEL-HEATED APPARATUS
Title (en)
CIRCUIT AND METHOD FOR MONITORING A FUEL-HEATED APPARATUS
Publication
Application
Priority
DE 4111947 A 19910412
Abstract (en)
[origin: EP0508081A2] The invention relates to a circuit arrangement and a method for monitoring a fuel-heated apparatus with a control unit (10), with at least one electrically drivable valve (16, 18) in the fuel supply line (22) to a burner (23), with a flame monitoring device (47) and with a safety circuit (32) for switching off the valve (16, 18). It is proposed that a redundant monitoring circuit (28, 36, 46, 50, 54) be provided, which is connected to the safety circuit (32) and delivers at least one safety-related signal to the same. By means of the special design of the circuit arrangement, error states can be recognised and used for switching off the system. Moreover, the drive paths can be inspected for possible errors. <IMAGE>
IPC 1-7
IPC 8 full level
F23N 5/20 (2006.01); F23N 5/24 (2006.01); G05B 19/04 (2006.01)
CPC (source: EP)
F23N 5/203 (2013.01); F23N 5/242 (2013.01); F23N 2223/08 (2020.01); F23N 2223/22 (2020.01); F23N 2227/14 (2020.01); F23N 2227/16 (2020.01); F23N 2227/36 (2020.01); F23N 2229/00 (2020.01); F23N 2231/10 (2020.01); F23N 2235/14 (2020.01); F23N 2235/18 (2020.01)
Citation (search report)
- [A] US 4832594 A 19890523 - YOUTZ STEPHEN E [US]
- [A] US 4518345 A 19850521 - MUELLER CARL J [US], et al
- [A] EP 0010767 A1 19800514 - HONEYWELL INC [US]
- [A] US 4695246 A 19870922 - BEILFUSS ROBERT C [US], et al
- [A] US 4842510 A 19890627 - GRUNDEN MICHAEL T [US], et al
- [A] EP 0250317 A1 19871223 - TELEMECANIQUE ELECTRIQUE [FR]
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0508081 A2 19921014; EP 0508081 A3 19930203; EP 0508081 B1 19960925; DE 4111947 A1 19921015; DE 59207215 D1 19961031; ES 2093126 T3 19961216
DOCDB simple family (application)
EP 92103323 A 19920227; DE 4111947 A 19910412; DE 59207215 T 19920227; ES 92103323 T 19920227