Totally Aerated Combustion Burner

Abstract

A totally aerated combustion burner is provided with a combustion plate part through which air-fuel mixture is ejected. The combustion plate part includes: a porous body made of metal fibers; and a distribution plate stacked on a back surface of the porous body, the distribution plate having formed therein a multitude of distribution holes, thereby enabling reduction in cost. The porous body is formed by nonwoven fabric made by laminating metal fibers in the form of felt. A front surface of the nonwoven fabric is covered by a meshed sheet made of metal. Preferably, the meshed sheet is made by knitting a wire member into the form of a mesh, the wire member being formed by bundling together a plurality of metal fibers. The mesh size of the meshed sheet shall preferably be below a flame-out distance of the air-fuel mixture to be ejected out of the combustion plate part.

What is claimed is: 
     
         1 . A totally aerated combustion burner comprising a combustion plate part through which air-fuel mixture is ejected, the combustion plate part including: a porous body made of metal fibers; and a distribution plate stacked on a back surface of the porous body, the back surface being defined as an upstream-side surface as seen in a direction of flow of the air-fuel mixture, the distribution plate having formed therein a multitude of distribution holes so that the air-fuel mixture can be ejected through the distribution holes and the porous body,
 the porous body being constituted by nonwoven fabric made by laminating metal fibers in a form of felt, a front surface of the nonwoven fabric being covered by a meshed sheet made of metal, the front surface being defined as the surface on a downstream side as seen in the direction of flow of the air-fuel mixture.   
     
     
         2 . The totally aerated combustion burner according to  claim 1 , wherein the distribution plate includes a band-shaped hole-free portion having formed therein no distribution hole, and wherein the felt has a thickness of 1-5 mm. 
     
     
         3 . The totally aerated combustion burner according to  claim 1 , wherein the meshed sheet is made by knitting a wire member into a form of a mesh, the wire member being formed by bundling together a plurality of metal fibers. 
     
     
         4 . The totally aerated combustion burner according to  claim 1 , wherein the mesh size of the meshed sheet is below a flame-out distance of the air-fuel mixture to be ejected out of the combustion plate part.