| 摘要 |
No exit-flame burner includes nested elongate mixing and ignition tubes. The mixing chamber tube is of shorter length than the ignition chamber tube and is nested coaxially. The first ends of the ignition and mixing chamber tubes are sealed by a sealing member. A gas port for delivery of oxygen-bearing gas is formed in the sealing member. A gas diffuser is nested coaxially within the mixing chamber tube. A fuel-feeding bore within the gas diffuser is aligned coaxially within the mixing chamber tube. The gas diffuser is shaped as a rhombus in cross-section along the longitudinal axis to thereby define a rim around an apex thereof. The rim extends substantially around, closely adjacent to, a corresponding inside surface of the mixing chamber tube to thereby define an upstream gas plenum upstream of the rim between the rim and the sealing member. In use the burner provides an efficient burn so only heated exhaust gases exit the ignition tube, giving directional control for use of the heat on what may be a small area.
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