Global Patent Index - EP 0909922 A1

EP 0909922 A1 19990421 - Combined gas-air control system for controlling combustion in gas fired boilers

Title (en)

Combined gas-air control system for controlling combustion in gas fired boilers

Title (de)

Kombiniertes Regelsystem für Gas und Luft zur Verbrennungsregelung eines Gasheizkessels

Title (fr)

Système de commande combinée à gaz et à air pour commander la combustion d'une chaudière à gaz

Publication

EP 0909922 A1 19990421 (EN)

Application

EP 97830520 A 19971017

Priority

EP 97830520 A 19971017

Abstract (en)

The combined gas-air control system for gas fired boilers (B) including a microcontroller ( mu C) with memory means, set point temperature selector means (Rh,Rs), measuring means (18,19,20,21), a thermostat (27), a variable-speed fan (6), a gas modulating valve (MV) in which the microcontroller ( mu C) comprises: first controlling means (22) for correcting the error signal E(T)=Trh-Th or E(T)=Trs-Ts and for controlling the air pressure in the combustion chamber (1), second controlling means (23) for correcting the error signal E(P)=Pac-Pa and for controlling the speed of the fan, processing means (24,25) for processing the ionisation voltage and the modulating valve current signals, third controlling means (26) for correcting the error signal E(V)=Vion(th)-Vion and the modulating valve current. <IMAGE>

IPC 1-7

F23N 5/12; F23N 1/10

IPC 8 full level

F23N 1/10 (2006.01); F23N 5/12 (2006.01)

CPC (source: EP)

F23N 1/102 (2013.01); F23N 5/123 (2013.01); F23N 2223/08 (2020.01); F23N 2223/36 (2020.01); F23N 2225/04 (2020.01); F23N 2225/18 (2020.01); F23N 2225/19 (2020.01); F23N 2233/04 (2020.01); F23N 2233/08 (2020.01); F23N 2235/16 (2020.01); F23N 2241/06 (2020.01)

Citation (search report)

  • [A] EP 0429034 A2 19910529 - VAILLANT JOH GMBH & CO [DE]
  • [A] DE 19618573 C1 19970626 - STIEBEL ELTRON GMBH & CO KG [DE]
  • [A] DE 19601517 A1 19970724 - STIEBEL ELTRON GMBH & CO KG [DE]
  • [A] PATENT ABSTRACTS OF JAPAN vol. 095, no. 006 31 July 1995 (1995-07-31)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 014, no. 049 (M - 0927) 29 January 1990 (1990-01-29)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 014, no. 416 (M - 1021) 7 September 1990 (1990-09-07)

Designated contracting state (EPC)

AT DE ES FR GB IT

DOCDB simple family (publication)

EP 0909922 A1 19990421; EP 0909922 B1 20020109; AT E211809 T1 20020115; DE 69709928 D1 20020228; DE 69709928 T2 20020829; ES 2170360 T3 20020801

DOCDB simple family (application)

EP 97830520 A 19971017; AT 97830520 T 19971017; DE 69709928 T 19971017; ES 97830520 T 19971017