Burner

Abstract

Provided is a burner. The burner includes a burner body into which a gas is supplied, a burner head seated on the burner body and defining an air passage, through which external air flows, together with the burner body, the burner head including an outer head and an inner head, and a burner cap seated on the burner head. The burner head and the burner cap define a mixed gas passage for guiding a mixed gas, in which the gas and air supplied into the inner head are mixed with each other, into the outer head and a flame propagation passage for propagating flame between the outer head and the inner head.

What is claimed is: 
     
         1 . A burner comprising:
 a burner body into which a gas is supplied;   a burner head seated on the burner body and defining an air passage, through which external air flows, together with the burner body, the burner head comprising an outer head and an inner head; and   a burner cap seated on the burner head,   wherein the burner head and the burner cap define a mixed gas passage to guide a mixed gas, in which the gas and air supplied into the inner head are mixed with each other, into the outer head and a flame propagation passage to propagate flame between the outer head and the inner head.   
     
     
         2 . The burner according to  claim 1 , wherein the burner head comprises a mixed gas guide wall that connects the inner head to the outer head to define the mixed gas passage. 
     
     
         3 . The burner according to  claim 1 , wherein the mixed gas guide wall has an opened upper side, and the burner cap covers the upper side of the mixed gas guide wall. 
     
     
         4 . The burner according to  claim 3 , wherein the burner cap comprises:
 an outer cap to cover the outer head;   an inner cap to cover the inner head; and   a connection part that connects the outer cap to the inner cap to cover the mixed gas guide wall.   
     
     
         5 . The burner according to  claim 4 , wherein a plurality of ribs spaced apart from each other are disposed on the connection part, and
 the mixed gas guide wall is disposed between the plurality of ribs in the state where the connection part covers the mixed gas guide wall.   
     
     
         6 . The burner according to  claim 1 , wherein the outer burner comprises a first head and a second head which are spaced apart from each other, and
 the flame propagation passage is defined between the first head and the second head.   
     
     
         7 . The burner according to  claim 6 , wherein each of the first head and the second head comprises:
 an outer wall having one or more flame holes;   an inner wall spaced apart from the outer wall and having one or more flame holes;   a connection wall that connects both ends of the outer wall and the inner wall to each other,   wherein the flame propagation passage is defined between the connection wall of the first head and the connection wall of the second head.   
     
     
         8 . The burner according to  claim 7 , wherein each of the connection wall of the first head and the connection wall of the second head has a first flame hole to propagate flame generated in one of the outer walls of the first and second heads, and
 a second flame hole to allow the flame to stay in the flame propagation passage is defined in one of the connection walls of the first and second heads.   
     
     
         9 . The burner according to  claim 8 , wherein the second flame hole is disposed more adjacent to the inner head when compared to the first hole. 
     
     
         10 . The burner according to  claim 6 , wherein the burner cap covers the flame propagation passage. 
     
     
         11 . The burner according to  claim 1 , wherein en extension direction of the flame propagation passage and an extension direction of the mixed gas passage cross each other. 
     
     
         12 . The burner according to  claim 1 , wherein a mixed gas guide tube to guide the mixed gas is disposed in the inner head. 
     
     
         13 . The burner according to  claim 1 , wherein the burner cap covers the outer head and the inner head at the same time. 
     
     
         14 . A burner comprising:
 a burner body into which a gas is supplied, the burner body having an air passage through which introduced external air flows;   a burner head to cover the air passage, the burner head comprising an outer head and an inner head; and   a burner cap to cover the burner head,   wherein a mixed gas in which air and a gas are mixed with each other flows from the inner head to the outer head, and   flame generated by ignition of the mixed gas is propagated from the outer head to the inner head.   
     
     
         15 . The burner according to  claim 14 , wherein the burner head comprises:
 a mixed gas passage to guide the mixed gas supplied into the inner head into the outer head; and   a flame propagation passage to propagate the flame generated in the outer head toward the inner head.   
     
     
         16 . The burner according to  claim 15 , wherein the outer head comprises a plurality of heads that are spaced apart from each other,
 the flame propagation passage is defined between the plurality of heads, and   the burner cap covers the flame propagation passage.   
     
     
         17 . The burner according to  claim 15 , wherein the burner cap covers the mixed gas passage. 
     
     
         18 . A burner comprising:
 a burner body into which a gas is supplied, the burner body having an air passage through which introduced external air flows;   a burner head disposed an upper side of the burner body to cover the air passage, the burner head comprising an outer head and an inner head; and   a burner cap disposed an upper side of the burner head,   wherein the burner head comprises a mixed gas passage to allow the inner head to communicate with the outer head and a flame propagation passage to propagate flame between the outer head and the inner head, and   the burner cap covers each of the mixed gas passage and the flame propagation passage.   
     
     
         19 . The burner according to  claim 18 , wherein the burner head comprises a mixed gas guide wall that connects the inner head to the outer head to define the mixed gas passage, and
 the burner cap is seated on the mixed gas guide wall.   
     
     
         20 . The burner according to  claim 18 , wherein the outer head comprises a first head and a second head, which are spaced apart from each other, and
 the flame propagation passage is defined between the first head and the second head.