(19)
(11) EP 0 950 854 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.03.2000 Bulletin 2000/09

(43) Date of publication A2:
20.10.1999 Bulletin 1999/42

(21) Application number: 99302774.7

(22) Date of filing: 09.04.1999
(51) International Patent Classification (IPC)7F23D 14/72, F23Q 9/00, F23N 5/12
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 10.04.1998 JP 9897698
29.03.1999 JP 8539799

(71) Applicant: Rinnai Kabushiki Kaisha
Nagoya-shi, Aichi-ken (JP)

(72) Inventors:
  • Sobue, Tsutomu, c/o Rinnai Kabushiki Kaisha
    Nagoya-shi, Aichi-ken (JP)
  • Ohashi, Ryusei, c/o Rinnai Kabushiki Kaisha
    Nagoya-shi, Aichi-ken (JP)

(74) Representative: Abrams, Michael John et al
Haseltine Lake & Co., Imperial House, 15-19 Kingsway
London WC2B 6UD
London WC2B 6UD (GB)

   


(54) Combustion device


(57) A combustion device has a ceramic burner (3) comprising a porous ceramic plate having a plurality of burner ports (32) defined therein, an electrically conductive layer (7) disposed on a surface of the ceramic burner where flames are produced, an electric conductor (8) disposed in facing relation to the electrically conductive layer, and an ignition detector (9) for detecting a flame current flowing through the flames (F) to detect an ignition when a voltage is applied between the electrically conductive layer and the electric conductor. The electrically conductive layer is made of an electrically conductive perovskite-type metal oxide.







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