EP 1122498 A3 20040121 - Gas appliances and control systems
Title (en)
Gas appliances and control systems
Title (de)
Gasgeräte und Steueranlage
Title (fr)
Appareils à gaz et dispositifs de commande
Publication
Application
Priority
GB 0002263 A 20000202
Abstract (en)
[origin: EP1122498A2] A gas boiler has a thermistor 12 located in a passage 51 opening into an inner enclosure 80 containing the burner 1, heat exchanger 4 and the inlet of an induced draught blower 5. Reduced pressure in the enclosure 80 generated by the blower 5 draws air along the passage 51 over the thermistor 12. A comparator 17 receives the output of the thermistor 12 and that of a second thermistor 13 protected from air flow. The output of the comparator 17, together with outputs from other safety sensors 26, is connected with a logic unit 30, which controls operation of the burner gas supply valve 3. If there is a blockage, blower failure or the like, air flow over the thermistor 12 drops causing a change in output of the comparator 17, which causes the logic unit 30 to shut off the gas supply valve 3. <IMAGE>
IPC 1-7
IPC 8 full level
F23N 1/06 (2006.01); F23N 5/14 (2006.01); F23N 5/24 (2006.01); F23N 5/18 (2006.01)
CPC (source: EP)
F23N 1/062 (2013.01); F23N 5/143 (2013.01); F23N 5/242 (2013.01); F23N 2005/181 (2013.01); F23N 2223/08 (2020.01); F23N 2231/10 (2020.01); F23N 2231/26 (2020.01); F23N 2233/02 (2020.01); F23N 2235/14 (2020.01)
Citation (search report)
- [XY] EP 0087539 A1 19830907 - LEBLANC SA E L M [FR]
- [XY] DE 9210862 U1 19921015
- [X] US 4951651 A 19900828 - SHELLENBERGER TIMOTHY J [US]
- [XY] PATENT ABSTRACTS OF JAPAN vol. 0112, no. 89 (M - 625) 18 September 1987 (1987-09-18)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1122498 A2 20010808; EP 1122498 A3 20040121; GB 0002263 D0 20000322; GB 0102221 D0 20010314; GB 2358915 A 20010808
DOCDB simple family (application)
EP 01300583 A 20010123; GB 0002263 A 20000202; GB 0102221 A 20010125