| 摘要 |
PURPOSE:To stabilize flames, and to reduce noise by mixing gas fuel with combustion air sufficiently, by providing a number of narrow multi-bend flow paths in a position in a flow passage located before the inlet of combustion air and the inlet of gas fuel. CONSTITUTION:A permeable porous body 4 in which a number of narrow multi-bend flow paths 4' are provided is formed into a cylindrical shape having a small diameter hole and a large diameter hole. It is fitted in a case 1 and on a pipe 3 in the small diameter hole. A number of narrow multi-bend flow paths 4' compose a number of juxtaposed flow paths continuously bent in chevrons in the flowing direction for example. A blower 'B' to feed combustion air is connected to an air chamber 5, and a cylinder 6 is fitted in the large diameter hole of a porous body 4. Injection ports 8a, 8b for a primary and a secondary combustion airs are formed by connecting the injection paths 7 of combustion air with the side of a combustion chamber, and the injection pipe 2 of gas fuel and the injection paths 7 of combustion air are opened to a combustion space 9. A gas burner is formed by relatively disposing an inlet port 2a and the injection ports 8a, 8b so that the fluid injected from those ports will form parallel flows. With such as arrangement flames are stabilized and combustion noise can be suppressed low.
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