| 摘要 |
<p>A portable gas-fired forced draft heater (10) has a burner assembly (27) mounted in a tube (13) coupled to the intake port (37) of a motor-driven blower (11). The burner (27) operates in a stream of high velocity air which flows past the burner (27) to the blower (11). The burner (27) includes shrouds (41, 43) which cooperate with a fuel and air mixing nozzle (40) to enable fuel to be burned efficiently and reliably over a wide range of fuel flow rates to the burner (27). A flame stabilization surface (63) is spaced appropriately from the nozzle (57) to enable reliable ignition of the fuel-air mixture. A controlled portion of the warm gases passing through the blower (11) is routed to a receptacle (14) for a fuel container (15) to maintain pressure in the container (15) as the preferably liquified gas fuel is consumed during operation of the heater (10).</p> |
