Gas burner comprising a burner heat

Abstract

Gas burner ( 1 ) comprising a mixing chamber ( 5 ); a burner head ( 19 ) provided with a plurality of openings ( 22 ) in fluidic communication with the outside, the burner head ( 19 ) constituting part of the wall of the mixing chamber ( 5 ), the burner head ( 19 ) comprises: a central hole ( 18 ); a first zone ( 23 ) comprising openings of a dimension of between 0.8 and 1 mm; a second zone ( 25 ) surrounding the first zone ( 23 ) and comprising openings of a dimension of between 0.8 and 1.5 mm; a solid annular intermediate zone ( 31 ) situated between the first and the second zone ( 25 ); the burner head further comprising an annular shoulder ( 21 ).

1 . A gas burner comprising:
 a mixing chamber,   a burner head provided with a plurality of openings in fluid communication with an outside, the burner head constituting part of a wall of the mixing chamber,   
       wherein the burner head includes:
 a central hole, 
 a first area disposed around the central hole with a width between 2 and 20 mm, comprising openings a dimension of which is between 0.3 and 2 mm, a distance separating the openings being between 0.5 and 3.5 mm, 
 a second area with a width between 2 and 20 mm, the second area surrounding the first area and comprising openings a dimension of which is between 0.3 and 2 mm, a distance separating the openings being between 0.5 and 3.5 mm, 
 a solid intermediate annular area, located between the first and second area, with a width between 2 and 20 mm, 
 
       the burner head further comprising an annular shoulder ( 21 ). 
     
     
         2 . The gas burner according to  claim 1 , wherein the first and/or second area comprise(s) openings the dimensions of which range between 0.8 and 1.5 mm, the distance separating the openings being between 1.5 and 2.5 mm. 
     
     
         3 . The gas burner according to  claim 1 , wherein the first area has a width ranging between 3 and 15 mm. 
     
     
         4 . The gas burner according to  claim 1 , wherein the second area has a width ranging between 5 and 15 mm. 
     
     
         5 . The gas burner according to  claim 1 , wherein the intermediate area has a width ranging between 5 and 15 mm. 
     
     
         6 . The gas burner according to  claim 1 , wherein at least a part of the openings of the second area is disposed on an upper surface of the shoulder. 
     
     
         7 . The gas burner according to  claim 1 , wherein at least a part of the openings of the second area is disposed on an internal surface of the shoulder. 
     
     
         8 . The gas burner according to  claim 1 , wherein the periphery of the burner head has a peripheral wall forming a crown the edge of which is disposed beyond the surface of the shoulder in an extension direction of the flame. 
     
     
         9 . The gas burner according to  claim 8 , wherein the crown comprises a radial surface having openings a dimension of which is between 1 and 2.5 mm, the openings being in fluid communication with the outside. 
     
     
         10 . The gas burner according to  claim 9  comprising a flange surrounding the radial surface of the crown.
 a distance separating the flange from the radial surface being between 0.5 and 2 mm. 
 
     
     
         11 . The gas burner according to  claim 10 , wherein a space located between the flange and the radial surface is an annular peripheral chamber,
 the annular peripheral chamber is in fluid communication with the outside through an annular slit, the annular slit adjoining the edge of the crown.   
     
     
         12 . The gas burner according to  claim 11 , wherein the flange comprises an upper rim,
 the upper rim defining the outer peripheral end of the slit and the rim being slanted in a direction of the edge of the crown in such a manner as to partially close the peripheral chamber.   
     
     
         13 . The gas burner according to  claim 1 , including three secured parts:
 a lower part of a mixer and of the mixing chamber,   
       the mixer including a tubular duct having an inlet and an outlet delimiting an area for the circulation of a flow of gas/air mixture; a Venturi effect structure is comprised in a circulation area in such a manner as to increase the speed of the flow,
 an upper part of the mixer and of the mixing chamber, 
 the burner head. 
 
     
     
         14 . The gas burner, according to  claim 13 , wherein the mixer tangentially opens into the mixing chamber. 
     
     
         15 . The gas burner, according to  claim 13 , wherein the mixer is tangentially connected in the mixing chamber, the tubular duct of the mixer extending inside the mixing chamber.