| 摘要 |
An energy efficient convection barbecue pit for uniform cooking of meat. Heated smoke from a firebox passes through a joinder flue into a cooking chamber and is there urged upward by means of an inlet baffle. A convection fan located within a discharge duct connected to the ceiling of the cooking chamber draws the entering smoke through a suction port and discharges it through the duct. The discharge duct channels the smoke toward the front of cooking chamber and then downward thereby creating a turbulent, rolling air flow motion and a uniform temperature profile within the cooking chamber. Exhaust smoke exits at the bottom of the cooking chamber on either side of the inlet baffle and collects in a plenum chamber before exiting through an exhaust stack. Temperature within the cooking chamber is monitored by a thermostatically controlled firebox damper on the firebox door and a thermostatically controlled gas burner adjacent to the firebox. The gas burner functions both as a fire starter and as a temperature floor. A bypass damper in the plenum chamber directs smoke from the firebox into the cooking chamber when the barbecue pit is in the cooking mode and permits direct passage of smoke from the firebox through the exhaust stack when the barbecue pit is in the evacuation mode.
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