| 摘要 |
PURPOSE:To make the flame length small even at a small air excess ratio, and further to increase the burning rate per burner by disposing an air guide means in an air injection plate in a zig-zag form corresponding to flame port groups with the space between flame port groups as the upstream side. CONSTITUTION:As air supply ports 16 are disposed correspondingly to a flame port section 6 in a zig-zag form with the space between flame port groups 13 as the upstream side, the secondary air exiting from the air supply ports 16 is fed to envelope each small mass of mixture jetted out of the flame port groups 13. Therefore, the flame B formed over respective flame port groups 13 spreads sideways along an air injection plate 15 in the direction of width of the flame porr section 6, and is positively divided for each flame group 13 in the direction of length of the flame port section 6. Aa a result, there is no flame interference, and the contact area with the secondary air is enlarged. In this manner, even if the burning rate per burner is increased, the flame length will not become large, and heavt duty burning can be realized. |
