Cooking range burner arrangement

Abstract

A cooking range burner head arrangement includes an annular burner head with a plurality of gas orifices, the burner head including a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head. A secondary air flow metering arrangement is associated with the burner head, the secondary air flow metering arrangement defining a second flow path and a third flow path, the second flow path located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path, the third flow path located for flowing secondary air to the combustion space above the secondary flow provided by the second flow path.

1 . A cooking range burner arrangement, comprising:
 an annular burner head with a plurality of gas orifices, the burner head including a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head;   a bowl arrangement associated with the burner head, the bowl arrangement defining a second flow path and a third flow path, the second flow path located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path, the third flow path located for flowing secondary air into the combustion space above the secondary flow provided by the second flow path.   
     
     
         2 . The cooking range burner arrangement of  claim 1 , wherein the second flow path is radially outward of the first flow path, the third flow path is radially outward of the second flow path. 
     
     
         3 . The cooking range burner arrangement of  claim 2  wherein the second flow path feeds secondary air to a cone and/or mantle flame region and the third flow path feeds secondary air to a tail flame region. 
     
     
         4 . The cooking range burner arrangement of  claim 2 , wherein:
 the bowl arrangement comprises:
 an inner bowl structure disposed to define the first air flow path between an upper portion of the burner head and a lower portion of the inner bowl structure; 
 an outer bowl structure disposed at least partially about the inner bowl structure to define the second air flow path at least partially between the inner bowl structure and the outer bowl structure. 
   
     
     
         5 . The cooking range burner arrangement of  claim 4 , wherein:
 the inner bowl structure has a bottom edge aligned with and positioned above a top surface of the burner head, a wall of the inner bowl structure extends upwardly and radially outwardly;   the outer bowl structure has a bottom edge positioned higher than the bottom edge of the inner bowl structure and lower than a top edge of the inner bowl structure, a wall of the outer bowl structure extends upwardly and outwardly, and a top edge of the outer bowl structure is positioned higher than the top edge of the inner bowl structure.   
     
     
         6 . The cooking range burner arrangement of  claim 5 , wherein the first bowl structure and second bowl structure act as heat reflectors to reduce radially outward heat loss. 
     
     
         7 . The cooking range burner arrangement of  claim 4 , further comprising:
 a plate positioned above the second bowl structure for being heated by combustion in the combustion space, the plate including a plurality of heat exchange fin structures extending downward toward the combustion space.   
     
     
         8 . The cooking range burner arrangement of  claim 7  wherein a multiplicity of the heat exchange fin structures are arranged to extend radially relative to a central vertical axis of the burner head. 
     
     
         9 . The cooking range burner arrangement of  claim 8  wherein radially inward edges of the multiplicity of heat exchange fin structures are spaced outward of the central vertical axis, a center region of the bottom side of the plate lacking any heat exchange fin structure. 
     
     
         10 . The cooking range burner arrangement of  claim 9  wherein the multiplicity of heat exchange fin structures includes a first set of heat exchange fin structures with radially inward edges terminating a first distance from the central vertical axis and a second set of heat exchange fin structures with radially inward edges terminating a second distance from the central vertical axis, the second distance greater than the first distance. 
     
     
         11 . The cooking range burner arrangement of  claim 10  wherein a radial length of each heat exchange fin structure of the second set of heat exchange fin structures is substantially less than a radial length of each heat exchange fin of the first set of heat exchange fin structures. 
     
     
         12 . The cooking range burner arrangement of  claim 7  wherein:
 the inner bowl structure has a bottom edge aligned with and positioned above a top surface of the burner head, a wall of the inner bowl structure extends upwardly and radially outwardly; 
 the outer bowl structure has a bottom edge positioned higher than the bottom edge of the inner bowl structure and lower than a top edge of the inner bowl structure, a wall of the outer bowl structure extends upwardly and outwardly, and a top edge of the outer bowl structure is positioned higher than the top edge of the inner bowl structure, the top edge of the outer bowl structure positioned adjacent lower edges of the heat exchange fin structures. 
 
     
     
         13 . A cooking range burner arrangement, comprising:
 an annular burner head with a plurality of gas orifices, the burner head including a centrally disposed opening defining a first flow path for flowing secondary air upward into a combustion space proximate the burner head;   a secondary air flow metering arrangement associated with the burner head, the secondary air flow metering arrangement defining a second flow path and a third flow path, the second flow path located for flowing secondary air to the combustion space above the secondary flow provided by the first flow path, the third flow path located for flowing secondary air to the combustion space above the secondary flow provided by the second flow path.   
     
     
         14 . The cooking range burner arrangement of  claim 13 , wherein the second flow path is radially outward of the first flow path, the third flow path is radially outward of the second flow path. 
     
     
         15 . The cooking range burner arrangement of  claim 14  wherein the second flow path feeds secondary air to a cone and/or mantle flame region and the third flow path feeds secondary air to a tail flame region. 
     
     
         16 . The cooking range burner arrangement of  claim 15 , wherein:
 the secondary air flow metering arrangement comprises:
 an inner bowl structure disposed to define the first air flow path between an upper portion of the burner head and a lower portion of the inner bowl structure; 
 an outer bowl structure disposed at least partially about the inner bowl structure to define the second air flow path at least partially between the inner bowl structure and the outer bowl structure. 
   
     
     
         17 . A kit for updating an open-top gas burner including a burner head, the kit comprising:
 an inner bowl structure for positioning above the burner head;   an outer bowl structure disposed at least partially about the inner bowl structure to define an air flow path at least partially between the inner bowl structure and the outer bowl structure; and   a plate member for positioning above the inner and outer bowl structure.   
     
     
         18 . The kit of  claim 17  further comprising a support unit for supporting the plate member and the bowls above the burner head. 
     
     
         19 . The kit of  claim 17  wherein the plate member includes a plurality of radially extending heat exchange fins on its lower surface.