| 摘要 |
<p>The burner nozzle has a coaxial air supply tube whose conical outlet projects into coaxial flame tube. The heater uses liquefied fuel gas. The downwards directed burner nozzle (10) joins a cylindrical burner sleeve (11) with perforations at the top for air inlet. This sleeve projects approximately to the narrowest point in the conical inlet section of the venturi tube (6). The narrowest point of this venturi tube is extended by a cylindrical pipe section (6b). The radiant heat is generated by the base envelope (2) held in the ground by stick (1).</p> |
