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.

Description

BACKGROUND OF THE INVENTION1. Technical Field[0001]The present invention relates to a totally aerated combustion burner which is provided with a combustion plate part through which air-fuel mixture is ejected.2. Related Art[0002]In this kind of totally aerated combustion burner, there is known an arrangement in which the combustion plate part comprises: a porous body made of metal fibers; and a distribution plate stacked (overlapped) on a back surface of the porous body, the back surface being defined as an upstream-side surface of the porous body as seen in a direction of flow of the air-fuel mixture, and the distribution plate having formed therein a multitude of distribution holes. The air-fuel mixture can thus be ejected through the distribution holes and the porous body (see, for example, JP2014-9838A).[0003]In the above-mentioned known example, the porous body is made up by knitting metal fibers into woven fabric. However, in order to knit this kind of woven fabric, metal fibe...

AI Technical Summary

Benefits of technology

This invention relates to a nonwoven fabric of metal fibers for the production of a porous body, which can reduce the cost of the porous body due to the absence of ultrafine metal fibers required in knitted textile fabric. However, the nonwoven fabric may still fray during use, causing metal fibers to drop out of position. To address this issue, a meshed sheet made of metal is used to prevent the metal fibers from dropping out of the nonwoven fabric. Additionally, the thickness of the nonwoven fabric should be between 1 to 5 mm for optimal performance. In this invention, a mesh size of the meshed sheet is below the flame-out distance of the air-fuel mixture to be ejected out of the combustion plate part, which prevents flame lifting and maintains durability.

Problems solved by technology

Since it costs a lot to manufacture this kind of ultrafine metal fibers, the example in the related art in which the porous body is made up of knitted woven fabric made of metal fibers becomes expensive.

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