Gas burner with multiple rings of flames having two parallel venturis, one above the other

Abstract

A gas burner with multiple rings of flames, suitable for mounting on a top plate of a cooking appliance in particular for household use. The top plate extends substantially in a plate plane. The gas burner includes a central burner having a ring of peripheral flames and at least one annular burner having at least one ring of peripheral flames. The annular burner surrounds the central burner. The gas burner also includes a burner body suitable for attachment to the top plate. The burner body includes at least a first gas inlet communicating with a first gas injector situated facing a first convergent-divergent pipe forming a Venturi tube. The first pipe has an axis substantially parallel to said plate plane. The first pipe extends over at least the greater portion of a transverse extension of the burner body. The first pipe is, at its end opposite to the first gas injector, in communication with a shaft substantially perpendicular to the axis of the first pipe. The shaft is open at the top and adapted to supply the annular burner with an air/gas mixture. The burner body includes a second pipe forming a Venturi tube, its axis parallel to the axis of the first pipe and situated above the first pipe. The second pipe has one end in communication with an opening at the top of the burner body, adapted to supply the central burner with an air/gas mixture.