Inward fired dual-stage radial gas burner assembly for cooktop appliance

Abstract

A cooktop appliance and gas burner assembly are provided. A first burner body includes a plurality of first flame ports distributed along a circumferential direction about a central combustion zone radially inward of the plurality of first flame ports. The first burner body includes a first mixing chamber fluidly coupled to the plurality of first flame ports to distribute a first flow of fuel therethrough. A second burner body includes a plurality of second flame ports distributed along the circumferential direction about the central combustion zone. The second burner body includes a second mixing chamber fluidly coupled to the plurality of second flame ports to distribute a second flow of fuel therethrough. The second burner body is positioned radially inward of the first burner body, and the plurality of second flame ports is positioned along an axial direction below the plurality of first flame ports.

What is claimed is: 
     
         1 . A gas burner assembly for a cooktop appliance, comprising:
 a first burner body comprising a plurality of first flame ports distributed along a circumferential direction about a central combustion zone radially inward of the plurality of first flame ports, the first burner body comprising a first mixing chamber fluidly coupled to the plurality of first flame ports to distribute a first flow of fuel therethrough;   a second burner body comprising a plurality of second flame ports distributed along the circumferential direction about the central combustion zone, the second burner body comprising a second mixing chamber fluidly coupled to the plurality of second flame ports to distribute a second flow of fuel therethrough,   wherein the second burner body is positioned radially inward of the first burner body, and wherein the plurality of second flame ports is positioned along an axial direction below the plurality of first flame ports.   
     
     
         2 . The gas burner assembly of  claim 1 , wherein the plurality of second flame ports comprises a reference second height below a reference first height of the plurality of first flame ports, wherein the second height references an uppermost portion of the plurality of second flame ports. 
     
     
         3 . The gas burner assembly of  claim 2 , wherein the first height references a lowermost portion of the plurality of first flame ports. 
     
     
         4 . The gas burner assembly of  claim 1 , wherein the plurality of second flame ports comprises a reference second height below a reference first height of the plurality of first flame ports, wherein a height separation difference between the first height and the second height is at least double an axial dimension of the plurality of second flame ports. 
     
     
         5 . The gas burner assembly of  claim 1 , wherein the plurality of second flame ports comprises a reference second height below a reference first height of the plurality of first flame ports, wherein a height separation difference between the first height and the second height is at least approximately twelve millimeters. 
     
     
         6 . The gas burner assembly of  claim 1 , wherein the second burner body comprises a burner head, and wherein a maximum height of the burner head is at or above the plurality of first flame ports. 
     
     
         7 . The gas burner assembly of  claim 1 , wherein the plurality of second flame ports comprises a reference second height below a reference first height of the plurality of first flame ports, and wherein the second burner body comprises a burner head, and wherein a maximum height of the burner head is equal to or greater than the first height of the plurality of first flame ports. 
     
     
         8 . The gas burner assembly of  claim 1 , wherein the plurality of first flame ports and the plurality of second flame ports comprise a swirl component directionally similar to one another. 
     
     
         9 . The gas burner assembly of  claim 1 , wherein the first burner body and second burner body comprise a mixing throat extending along the axial direction. 
     
     
         10 . The gas burner assembly of  claim 1 , wherein the central combustion zone is free of burner material above a continuous sealed cooktop surface. 
     
     
         11 . The gas burner assembly of  claim 1 , wherein the first burner body and the second burner body comprise respective inner and outer side walls forming respective mixing chambers, wherein the plurality of first flame ports and the plurality of second flame ports are formed as respective inner side walls. 
     
     
         12 . A cooktop appliance, comprising:
 a top panel;   a gas burner assembly positioned at the top panel, the gas burner assembly comprising;
 a first burner body comprising a first inner side wall and a first outer side wall, wherein a plurality of first flame ports is distributed through the first inner side wall along a circumferential direction about a first central combustion zone radially inward of the plurality of first flame ports, wherein the first burner body comprises a first mixing chamber positioned between the first inner side wall and the first outer side wall, the first mixing chamber fluidly coupled to the plurality of first flame ports to distribute a first flow of fuel therethrough; 
 a second burner body comprising a second inner side wall and a second outer side wall, wherein a plurality of second flame ports is distributed through the second inner side wall along the circumferential direction about a second central combustion zone radially inward of the plurality of second flame ports, wherein the second burner body comprises a second mixing chamber positioned between the second inner side wall and the second outer side wall, the second mixing chamber fluidly coupled to the plurality of second flame ports to distribute a second flow of fuel therethrough, 
 wherein the second burner body is positioned radially inward of the first burner body, and wherein the plurality of second flame ports is positioned along an axial direction below the plurality of first flame ports. 
   
     
     
         13 . The cooktop appliance of  claim 12 , wherein the plurality of second flame ports comprises a reference second height below a reference first height of the plurality of first flame ports, wherein the second height references an uppermost portion of the plurality of second flame ports. 
     
     
         14 . The cooktop appliance of  claim 13 , wherein the first height references a lowermost portion of the plurality of first flame ports. 
     
     
         15 . The cooktop appliance of  claim 12 , wherein the plurality of second flame ports comprises a reference second height below a reference first height of the plurality of first flame ports, wherein a height separation difference between the first height and the second height is at least double an axial dimension of the plurality of second flame ports. 
     
     
         16 . The cooktop appliance of  claim 12 , wherein the plurality of second flame ports comprises a reference second height below a reference first height of the plurality of first flame ports, wherein a height separation difference between the first height and the second height is at least approximately twelve millimeters. 
     
     
         17 . The cooktop appliance of  claim 12 , wherein the second burner body comprises a burner head, and wherein a maximum height of the burner head is at or above the plurality of first flame ports. 
     
     
         18 . The cooktop appliance of  claim 12 , wherein the plurality of second flame ports comprises a reference second height below a reference first height of the plurality of first flame ports, and wherein the second burner body comprises a burner head, and wherein a maximum height of the burner head is equal to or greater than the first height of the plurality of first flame ports. 
     
     
         19 . The cooktop appliance of  claim 12 , wherein the plurality of first flame ports and the plurality of second flame ports comprise a swirl component directionally similar to one another. 
     
     
         20 . The gas burner assembly of  claim 1 , wherein the first burner body comprises a first mixing throat fluidly coupled to the first mixing chamber, and wherein the second burner body comprises a second mixing throat fluidly coupled to the second mixing chamber, wherein the first and second mixing throats extend along the axial direction.