Gas burner

Abstract

A gas burner for a hob includes: an injector holder, a base that can be positioned on the injector holder, a lid that can be positioned on the base. The lid, the base and the injector holder are superposed along a direction. The injector holder includes: at least one injector arranged so as to be aligned substantially along the Z direction, at least one concave support body which internally delimits a cavity in which a corresponding injector is mounted, and one and only gas inlet which is in fluid communication with said at least one injector. The base and the lid have a substantially elongated shape along an X direction, the extension along the X direction being greater than the extension along a Y direction where the X and Y directions are perpendicular both to each other and to the Z-direction.

1 . Gas burner for a hob, for heating elongated pans or cooking utensils, the gas burner comprising:
 an injector holder,   a base that can be positioned on said injector holder,   a lid that can be positioned on the base,   wherein said lid, said base and said injector holder are superposed along a direction Z,   said injector holder comprises:   at least one injector, arranged so as to be aligned substantially along the Z direction,   at least one concave support body which internally delimits a cavity in which a corresponding injector is mounted,   a single gas inlet which is in fluid communication with said at least one injector,   and wherein:   said base and said lid have a substantially elongated shape along an X direction, the extension along the X direction being greater than the extension along a Y direction where the X and Y directions are perpendicular both to each other and to the Z-direction,   said burner further comprises first doors obtained, for at least a portion, in correspondence with an external wall of the base and/or an external edge of the lid,   said burner further comprises second doors formed, for at least a portion, in correspondence with an internal wall of the base and/or an internal edge of the lid, said internal wall of the base and said internal edge surrounding at least partially an internal opening which is defined within the overall dimensions in plan of the base and of the lid,   said base and said lid are configured in such a way as to delimit at least one chamber for mixing and/or distributing a mixture of air and gas, thus supplying:
 a first external group of flames configured to emerge from said first doors towards the outside of the burner, 
 at least one second internal group of flames which emerge from said second doors towards the inside of said at least one internal opening. 
   
     
     
         2 . The burner according to  claim 1 , wherein the outer wall of the base and/or the outer edge of the lid define in plan view a substantially elliptical shape with an extension along the direction X which is greater than the extension along the Y direction, or a polygonal shape which can be inscribed in an ellipse having an extension along the X direction which is greater than the extension along the Y direction. 
     
     
         3 . The burner according to  claim 1 , wherein said base comprises a single chamber which is fluidically connected to a cavity of the injector holder. 
     
     
         4 . The burner according to  claim 1 , wherein:
 said base comprises two chambers,   said injector holder comprises two cavities, in each of which a corresponding injector is mounted,   each chamber is fluidically connected to one of said two cavities of the injector holder.   
     
     
         5 . The burner according to  claim 1 , wherein said injector holder is configured to be applied in correspondence with a through opening of a cooking hob and is configured to aspirate primary air from below the hob and/or from above the hob. 
     
     
         6 . The burner according to  claim 1 , wherein said base comprises at least one tubular duct which:
 develops downwards, substantially along the Z direction, from the bottom of the base, and   internally defines a channel which at the bottom is configured to face a corresponding injector mounted on the injector(s) holder and which opens at the top into said at least one chamber.   
     
     
         7 . The burner according to  claim 6 , wherein said at least one tubular duct defines within it a linear Venturi channel with a substantially vertical axis or substantially aligned along the Z direction. 
     
     
         8 . The burner according to  claim 6 , wherein said at least one tubular duct and said at least one chamber, into which said at least one tubular duct opens, are configured to define a radial Venturi. 
     
     
         9 . The burner according to  claim 1 , further comprising two internal openings which are defined by two first internal openings obtained on the base and by two second internal openings obtained on the lid. 
     
     
         10 . The burner according to  claim 9 , wherein said base includes comprises:
 an external channel, substantially annular in shape elongated along the X direction,   said at least two first internal openings positioned on the sides of or around a central area which is connected to said external channel by at least one radial section.   
     
     
         11 . The burner according to  claim 10 , wherein:
 said tubular duct opens into said central area,   said lid also comprising said two corresponding second internal openings, facing said first openings along the Z direction, and having a shape which in plan substantially corresponds to that of said base to thus close above said chamber which is defined by said base and by said lid.   
     
     
         12 . The burner according to  claim 1 , wherein:
 said injector holder comprises a single cavity in which a corresponding injector is mounted,   said tubular duct faces said injector.   
     
     
         13 . The burner according to  claim 1 , wherein said base comprises at least two first internal openings which are placed side by side along the axis X. 
     
     
         14 . The burner according to  claim 6 , further comprising a single internal opening which is defined by a first internal opening obtained on the base and by a second internal opening obtained on the lid. 
     
     
         15 . The burner according to  claim 14 , wherein said base comprises:
 an external channel, substantially annular in shape elongated along the X direction, into which two tubular ducts open,   said single first internal opening, substantially elongated along the X direction, is surrounded by said external channel.   
     
     
         16 . The burner according to  claim 15 , wherein said lid comprises said single second internal opening facing said single first internal opening along the Z direction, and having a shape which in plan substantially corresponds to that of said base to thus close above said at least one chamber which is defined by said base and by said lid. 
     
     
         17 . The burner according to  claim 15 , wherein said two tubular ducts open into two zones of the external channel which are diametrically opposite along the direction Y. 
     
     
         18 . The burner according to  claim 1 , wherein:
 said injector holder comprises two cavities, in each of which a corresponding injector is mounted,   said two cavities of said injector holder being side by side, along the Y direction.   
     
     
         19 . The burner according to  claim 18 , wherein said base comprises two tubular ducts and that each of said two tubular ducts faces a corresponding injector. 
     
     
         20 .- 23 . (canceled) 
     
     
         24 . The burner according to  claim 1 , wherein each concave support body of the injector(s) holder is open at the top to thus allow access to the corresponding injector mounted inside the cavity defined inside said concave support body.