Unitary igniter and flame sensor

Abstract

An integral igniter and flame sensor for a furnace includes a mounting base installable in an access port to a burner in a furnace. An igniter extends from the mounting base toward at least one burner of the furnace, and a flame sensor extends from the same mounting base toward the at least one burner. A furnace includes a housing and a heat exchange portion located in the housing. The heat exchange portion includes a heat exchanger and a burner assembly located to heat the heat exchanger. The burner assembly includes at least one burner and an integral igniter and flame sensor. The integral igniter and flame sensor includes a mounting base installable in an access port to the at least one burner. An igniter extends from the mounting base toward the at least one burner and a flame sensor extends from the same mounting base toward the same burner.

1 . An integral igniter and flame sensor assembly for a furnace comprising:
 a mounting base installable in an access port to the burner in a furnace;   an igniter extending from the mounting base toward at least one burner of the furnace; and   a flame sensor extending from the mounting base toward the at least one burner.   
     
     
         2 . The assembly of  claim 1 , wherein the flame sensor extends at least partially around a perimeter of the igniter. 
     
     
         3 . The assembly of  claim 2 , wherein the flame sensor comprises a screen having a plurality of screen openings around the igniter. 
     
     
         4 . The assembly of  claim 2 , wherein the flame sensor comprises a helical coil wrapped around the igniter. 
     
     
         5 . The assembly of  claim 2 , wherein the igniter extends at least partially around a perimeter of the flame sensor. 
     
     
         6 . A burner assembly for a furnace comprising:
 at least one burner; and   an integral igniter and flame sensor including:
 a mounting base installable in an access port to the at least one burner in the furnace; 
 an igniter extending from the mounting base toward the at least one burner; and 
   a flame sensor extending from the mounting base toward the at least one burner.   
     
     
         7 . The burner assembly of  claim 6 , wherein the at least one burner is a premix burner. 
     
     
         8 . The burner assembly of  claim 6 , wherein the flame sensor extends at least partially around a perimeter of the igniter. 
     
     
         9 . The burner assembly of  claim 8 , wherein the flame sensor comprises a screen having a plurality of screen openings around the igniter. 
     
     
         10 . The burner assembly of  claim 8 , wherein the flame sensor comprises a helical coil wrapped around the igniter. 
     
     
         11 . The burner assembly of  claim 6 , wherein the igniter extends at least partially around a perimeter of the flame sensor. 
     
     
         12 . A furnace comprising:
 a housing;   a heat exchange portion disposed in the housing including:
 a heat exchanger; and 
 a burner assembly located to heat the heat exchanger, the burner assembly including:
 at least one burner; and 
 
   an integral igniter and flame sensor including:   a mounting base installable in an access port to the at least one burner in the furnace;   an igniter extending from the mounting base toward the at least one burner; and   a flame sensor extending from the mounting base toward the at least one burner.   
     
     
         13 . The furnace of  claim 12 , wherein the at least one burner is a premix burner. 
     
     
         14 . The furnace of  claim 12 , wherein the flame sensor extends at least partially around a perimeter of the igniter. 
     
     
         15 . The furnace of  claim 14 , wherein the flame sensor comprises a screen having a plurality of screen openings around the igniter. 
     
     
         16 . The furnace of  claim 14 , wherein the flame sensor comprises a helical coil wrapped around the igniter. 
     
     
         17 . The furnace of  claim 12 , wherein the igniter extends at least partially around a perimeter of the flame sensor.