(19)
(11) EP 1 621 814 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.02.2014 Bulletin 2014/09

(43) Date of publication A2:
01.02.2006 Bulletin 2006/05

(21) Application number: 05380106.4

(22) Date of filing: 26.05.2005
(51) International Patent Classification (IPC): 
F23N 5/10(2006.01)
F24C 3/10(2006.01)
F23D 14/72(2006.01)
 F23N 5/24(2006.01)
F23D 14/06(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 30.07.2004 ES 200401863 U

(71) Applicant: ORKLI, S. COOP.
20240 Ordizia (Gipuzkoa) (ES)

(72) Inventors:
  • Guirado Tristan, Jose A.
    20200 Beasain (Gipuzkoa) (ES)
  • Herzog Delgado, Juan
    20240 Ordizia (Gipuzkoa) (ES)

(74) Representative: Igartua, Ismael et al
Galbaian S.Coop. Polo de Innovación Garaia Goiru Kalea 1 - P.O. Box 213
20500 Arrasate-Mondragón (Gipuzkoa)
20500 Arrasate-Mondragón (Gipuzkoa) (ES)

   


(54) Flame safety thermocouple and thermocouple body


(57) The flame safety thermocouple (10) is adapted to a cooker gas burner (BU) with both a long flame (F1) and a short flame (F2). The sensing head (11,12) encloses a hot junction (HJ1) at an upper end (1) of small mass, and it comprises a frustoconical portion (12) which has a flame reception wall of a given axial length L2 and an angle of divergence alpha-2 (α2) adapted to the form of the short flame (F2), wherefore the temperature gradient is low between said flame reception wall (12) and the hot junction (HJ1). The outer sleeve (13) is connected to a larger diameter tubular base (14) for the cold junction (CJ2), a low thermal resistance from the sensing head (11-12) being obtained through said tubular base (14), and thereby a rapid deactivation of the actuator after the flame is extinguished. One embodiment of the thermocouple (10) has a secondary hot junction (HJ2) of opposite polarity, welded on the inner thermoelectric rod (15) and positioned under the sleeve segment L3 exposed to the ambient air.







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