Totally Aerated Combustion Burner

Abstract

The air-fuel mixture permeable member is disposed to overlap that surface of the burner frame which lies opposite to the burner body. The fixing frame is disposed so as to be fixed to the inner peripheral portion of the enclosing frame part of the burner frame by pinching the air-fuel mixture permeable member between the inner peripheral portion and the fixing frame. The air-fuel mixture permeable member has an extended part protruding outward beyond the fixing frame so as to cover by this extended part an outer peripheral portion of the enclosing frame part.

1 . A totally aerated combustion burner comprising:
 a burner body which is supplied inside thereof with an air-fuel mixture; and a combustion plate part which covers an open surface of the burner body and through which the air-fuel mixture is ejected,   the combustion plate part being made up of: a burner frame having in a central part thereof an air-fuel mixture passage region and an enclosing frame part around the air-fuel mixture passage region; and an air-fuel mixture permeable member which is made of heat-resistant fibers and which covers the air-fuel mixture passage region of the burner frame, the air-fuel mixture passage region of the burner frame having formed a single opening or a plurality of openings for the air-fuel mixture to pass therethrough,   wherein the air-fuel mixture permeable member is disposed to overlap that surface of the burner frame which lies opposite to the burner body;   wherein the combustion plate part further comprises a fixing frame which is fixed to that inner peripheral portion of the enclosing frame part of the burner frame which is closer to the air-fuel mixture passage region, in a manner to sandwich the air-fuel mixture permeable member between the enclosing frame part of the burner frame and the fixing frame; and   wherein the air-fuel mixture permeable member has an extended part protruding outward beyond the fixing frame so that the extended part covers that outer peripheral portion of the enclosing frame part which is positioned outside the fixing frame.   
     
     
         2 . The totally aerated combustion burner according to  claim 1 ,
 wherein a clearance is secured between the outer peripheral portion of the enclosing frame part and the extended part of the air-fuel mixture permeable member.   
     
     
         3 . The totally aerated combustion burner according to  claim 2 , wherein the outer peripheral portion of the enclosing frame part is provided with a plurality of projected parts at a circumferential distance from one another so as to secure the clearance by coming into contact with the extended part of the air-fuel mixture permeable member. 
     
     
         4 . The totally aerated combustion burner according to  claim 1 , wherein the air-fuel mixture permeable member is made of non-metal heat-resistant fibers.