High-power double burner for gas cookers, with multiple concentric flame crowns

Abstract

The present invention refers to a double burner for gas cookers with multiple concentric flames, characterized by high power and compact height, which comprises five Venturi mixing chambers, i.e. one central chamber ( 5 a ) with vertical axis that feeds the central burner and four regularly spaced chambers ( 6 a ) with inclined axis that feed the external annular burner.

1 . Double burner for gas cookers, with multiple concentric flame crowns, of the type comprising a head (T) with multiple concentric flame crowns and a circular tub-shaped body ( 1 ) which houses a nozzle-holding cross-piece ( 2 ) and two separate, non-communicating gas inlet conduits ( 3  and  4 ), each of them being designed to selectively and respectively supply the nozzle ( 5 ) associated with the central flame crown (FC) and the group of nozzles ( 6 ) associated with external flame crowns (FE);
 burner characterized in that the group of nozzles ( 6 ) is formed by minimum three regularly spaced nozzles ( 6 ) that supply corresponding Venturi mixing chambers ( 6   a ) with inclined axis, while the nozzle ( 5 ) supplies a corresponding Venturi mixing chamber ( 5   a ) with vertical axis whose diverging section ends in a circular compartment laterally closed by a toothed crown ( 12 ) of the central flames (FC) and superiorly by a circular cap ( 14 ); it being provided that the head (T) is provided with a lower series of radial partitions ( 15 ) that determine self-centering with respect to the nozzle-holder body ( 1 ), guaranteeing sufficient introduction of primary air (A) extracted from above the cooktop (P).   
   
   
       2 . Burner as defined in  claim 1 , characterized in that both gas inlet conduits ( 3  and  4 ) reach the centre of the body at slightly different heights. 
   
   
       3 . Burner as defined in  claim 2 , characterized in that the upper inlet conduit ( 3 ) exactly ends in the centre of the body ( 1 ), while the lower inlet conduit ( 4 ) goes beyond the centre. 
   
   
       4 . Burner according to  claim 2 , characterized in that a vertical channel ( 3   a ) branches upwards from the upper inlet conduit ( 3 ), on which the nozzle ( 5 ) is mounted, while a series of minimum three regularly spaced ascending and diverging channels ( 4   a ) branch from the lower inlet conduit ( 4 ), on which corresponding nozzles ( 6 ) are mounted. 
   
   
       5 . Burner as defined in  claim 1 , characterized in that the head (T) is formed of a lower dish ( 7 ) and an upper dish ( 8 ), shaped in such a way that they can perfectly match, where the lower dish ( 7 ) has a truncated-conical profile and has a stepped external border ( 7   a ) that supports and centres the upper dish ( 8 ) with a stepped perimeter collar ( 8   a ), which is also supported and centred in a central flange ( 9 ) on the lower dish ( 7 ). 
   
   
       6 . Burner as defined in  claim 5 , characterized in that the lower dish ( 7 ) and the upper dish ( 8 ) respectively have semi-conduits ( 7   b  and  8   b ) that form the Venturi mixing chambers ( 6   a ), while the chamber ( 5   a ) is completely housed in the upper dish ( 8 ). 
   
   
       7 . Burner as defined in  claim 5 , characterized in that it comprises, downstream the chambers ( 6   a ), a deflector partition ( 10 ) shaped as “V”, situated on the lower dish ( 7 ), which favours bifurcation of the air-gas mixture flow coming from the chambers ( 6   a ) conveying it inside a corridor ( 11 ) that supplies the external concentric flame crowns (FE). 
   
   
       8 . Burner as defined in  claim 7 , characterized in that the head (T) comprises an annular cap ( 13 ) and a circular cap ( 14 ) that respectively close the corridor ( 11 ) and the Venturi chamber ( 5 ); it being provided that the disk (B) has three toothed crowns ( 12 ). 
   
   
       9 . Burner as defined in  claim 5 , characterized in that the partitions ( 15 ) are obtained from the same piece as the lower dish ( 7 ). 
   
   
       10 . Burner as defined in  claim 4 , characterized in that a hole with vertical axis is drilled in central position on the body ( 1 ), starting from the lower gas inlet conduit ( 4 ) and ending in the coaxial vertical channel ( 3   a ) where the nozzle ( 5 ) is engaged and characterized in that, in the presence of the hole with vertical axis, the upper conduit ( 3 ) is occluded.