Burner for heating system

Abstract

A burner for a furnace includes an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The burner further includes an outer wall which, defines an annulus for the fuel flow to the plurality of inner wall openings. An igniter is located in the central chamber. A furnace includes a heat exchanger and one or more burners disposed at and aligned with one or more burner openings of the heat exchanger. The one or more burners include an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The one or more burners further include an outer wall defining an annulus for the fuel flow to the plurality of inner wall openings.

1 . A burner for a furnace comprising:
 an inner wall defining a central burner chamber, the inner wall including a plurality of inner wall openings to admit a fuel flow into the central burner chamber;   an outer wall, together with the inner wall defining an annulus for the fuel flow to the plurality of inner wall openings; and   an igniter disposed in the central chamber.   
     
     
         2 . The burner of  claim 1 , wherein the inner wall at least partially comprises a mesh screen defining the plurality of inner wall openings. 
     
     
         3 . The burner of  claim 1 , wherein one or more of the inner wall and the outer wall are substantially cylindrical. 
     
     
         4 . The burner of  claim 1 , wherein the inner wall and the outer wall are substantially concentric about a burner central axis. 
     
     
         5 . The burner of  claim 1 , wherein the igniter is disposed at a closed end of the burner. 
     
     
         6 . The burner of  claim 1 , further comprising a flame sensor disposed in the central burner chamber. 
     
     
         7 . The burner of  claim 1 , wherein the burner is alignable with a respective burner opening at a heat exchanger of a furnace. 
     
     
         8 . The burner of  claim 1 , wherein the plurality of inner wall openings are configured to convey a mixture of air and fuel into the central burner chamber. 
     
     
         9 . The burner of  claim 1 , wherein the inner wall is a replaceable element. 
     
     
         10 . A furnace comprising:
 a heat exchanger;   one or more burners disposed at and substantially aligned with one or more burner openings of the heat exchanger, the one or more burners including:   an inner wall defining a central burner chamber, the inner wall including a plurality of inner wall openings to admit a fuel flow into the central burner chamber;   an outer wall, together with the inner wall defining an annulus for the fuel flow to the plurality of inner wall openings; and   an igniter disposed in the central chamber.   
     
     
         11 . The furnace of  claim 10 , wherein the inner wall at least partially comprises a mesh screen defining the plurality of inner wall openings. 
     
     
         12 . The furnace of  claim 10 , wherein one or more of the inner wall and the outer wall are substantially cylindrical. 
     
     
         13 . The furnace of  claim 10 , wherein the inner wall and the outer wall are substantially concentric about a burner central axis. 
     
     
         14 . The furnace of  claim 10 , further comprising a flame sensor disposed in the central burner chamber. 
     
     
         15 . The furnace of  claim 10 , wherein the igniter is disposed at a closed end of the burner. 
     
     
         16 . The furnace of  claim 10 , wherein the inner wall is a replaceable element. 
     
     
         17 . The furnace of  claim 10 , wherein the plurality of inner wall openings are configured to convey a mixture of air and fuel into the central burner chamber. 
     
     
         18 . The furnace of  claim 10 , wherein thermal energy of a flue gas emitted by the one or more burners is transferred to the heat exchanger.