| 摘要 |
A gas burner arrangement for outdoor use includes a burner cup formed of a bottom wall and a cylindrical side wall extending integrally from the bottom wall in a smoothly curved radius. The bottom wall includes a central aperture for receiving a Venturi tube gas supply inlet connection. A pair of cylindrical flame screens are supported on the bottom wall of the burner cup, disposed in coaxial relationship concentrically about the central aperture. A top cap is secured to the bottom wall by bolts or other fasteners to secure the screen members in place in proper spacing and alignment. The top cap includes a domed center to provide strength to the cap and to facilitate smooth, non-turbulent flow of the gas-air mixture from the Venturi tube gas supply to the flame screens. The side wall of the burner cup extends higher than the flame screens to provide substantial wind protection. The Venturi gas supply is adjusted to provide a sub-stoichiometric air mixture, so that combustion and flame occur at the outer surface of the outer flame screen, where ambient air provides sufficient oxygen for complete combustion. The burner forms a continuous flame disposed about the outer flame screen and extending radially outwardly from the outer flame screen toward the inner surface of the side wall of the burner cup.
|
