Patent ID: 6851421

Claim:
An apparatus for removing cooking effluent from a cooking appliance in a conditioned space, said cooking effluent being such as to tend to rise by buoyancy effect as a plume, said apparatus comprising: an exhaust hood defining a recess with an access positioned above said cooking appliance; a wall of said recess being shaped to define at least one curved wall; said wall having an exhaust vent; said exhaust hood being positioned above said cooking appliance such that said plume rises into said recess and bends along said curved wall approximately 180 degrees; said hood having a duct therein to form a jet at at least one edge of said hood closest to said appliance, said jet being substantially vertical and being substantially planar in shape; a direction and position of said jet and a shape and position of said recess being such that said plume curving along said wall flows into a vortex and exchanges momentum from said jet, such that the vortex is partly within the canopy recess and partly below it and is confined and augmented by the jet.