Baffled ventilating hood

Claim 2

A hood structure for collecting fumes from a food-cooking device located below the hood, comprising: a housing having first wall means defining an exhaust chamber with an intake opening facing downwardly toward said device and having second wall means defining a supply chamber adjacent to and outwardly of said exhaust chamber, said supply chamber having a discharge opening near an edge of said intake opening, said exhaust chamber and said supply chamber having spaced and substantially parallel top walls; exhaust duct means communicating with said exhaust chamber; supply duct means communicating with said supply chamber through the top wall thereof and spaced from the two ends thereof; baffle means mounted on the top wall of said exhaust chamber and projecting upwardly toward the top wall of said supply chamber, said baffle means being spaced from the top wall of said supply chamber and being displaced laterally from the supply duct means; said baffle means having a portion extending between the ends of said top wall of the exhaust chamber and projecting upwardly therefrom near the front wall of said exhaust chamber; and an inverted, U-shaped diverter extending between and supported upon the front walls of said exhaust and supply chambers, said diverter having upright flanges spaced from the ends of the supply chamber and defining therewith a pair of spaced vertical passageways between said front walls.

Claim 3

A hood structure according to claim 1, including a pair of spaced and substantially horizontal baffles secured to the front wall of the exhaust chamber substantially even with the upper end of the U-shaped diverter, said horizontal baffles being adjacent said ends of said supply chamber and being spaced from said front wall of said supply chamber.

Claim 4

A hood structure adapted for connection to air moving means for removing fumes from a source spaced below the hood, and for supplying air to entrain said fumes, comprising: first wall means defining an exhaust chamber having an intake opening facing said source, said first wall means including a substantially horizontal top wall and a substantially vertical front wall fixedly interconnected to one edge of said top wall and extending downwardly therefrom; exhaust conduit means connected to said first wall means and extending away therefrom for providing communication with said exhaust chamber; second wall means disposed adjacent and spaced outwardly from said first wall means and defining a supply chamber therebetween, said second wall means including a substantially horizontal top wall and a substantially vertical front wall fixedly interconnected to one edge of the top wall and extending downwardly therefrom, the top and front walls of said second wall means being substantially parallel to and spaced upwardly and outwardly from the top and front walls of the first wall means, respectively, for defining said supply chamber therebetween, the lowermost edges of said front walls being spaced apart and defining an elongated downwardly directed discharge opening extending along one edge of said intake opening; supply conduit means connected to and extending away from said second wall means for providing communication with said supply chamber; baffle means secured to said first wall means and projecting toward but being spaced from said second wall means, said baffle means including an elongated baffle member extending substantially longitudinally of said hood and being disposed to project into said supply chamber at a region located between said discharge opening and said supply conduit means; and third wall means disposed between said exhaust chamber and connected to said first wall means for dividing said exhaust chamber into first and second compartments, said first compartment being in communication with said intake opening and said second compartment being in communication with said exhaust conduit means, said third wall means having removable filter means mounted thereon for permitting communication between said first and second compartments.

Claim 5

A hood structure adapted for connection to air moving means for removing fumes from a source spaced below the hood, and for supplying air to entrain said fumes, comprising: first wall means defining an exhaust chamber having an intake opening facing said source, said first wall means including a substantially horizontal top wall and a substantially vertical front wall fixedly interconnected to one edge of said top wall and extending downwardly therefrom; exhaust conduit means connected to said first wall means and extending away therefrom for providing communication with said exhaust chamber; second wall means disposed adjacent and spaced outwardly from said first wall means and defining a supply chamber therebetween, said second wall means including a substantially horizontal top wall and a substantially vertical front wall fixedly interconnected to one edge of the top wall and extending downwardly therefrom, the top and front walls of said second wall means being substantially parallel to and spaced upwardly and outwardly from the top and front walls of the first wall means, respectively, for defining said supply chamber therebetween, the lowermost edges of said front walls being spaced apart and defining an elongated downwardly directed discharge opening extending along one edge of said intake opening; supply conduit means connected to and extending away from said second wall means for providing communication with said supply chamber; baffle means secured to said first wall means and projecting toward but being spaced from said second wall means, said baffle means including an elongated baffle member extending substantially longitudinally of said hood and being disposed to project into said supply chamber at a region located between said discharge opening and said supply conduit means; and third wall means disposed between said exhaust chamber and connected to said first wall means for dividing said exhaust chamber into first and second compartments, said first compartment being in communication with said intake opening and said second compartment being in communication with said exhaust conduit means, said third wall means having removable filter means mounted thereon for permitting communication between said first and second compartments.

Claim 6

A structure according to claim 3, wherein said first wall means includes an inclined intermediate wall fixedly connected along one longitudinal edge thereof to said top wall and fixedly connected along the opposite longitudinal edge thereof to said front wall, said intermediate wall being inclined at a substantial angle to both said front wall and said top wall; said elongated baffle member being fixedly secured to the top wall of said first wall means directly adjacent said one edge of said inclined intermediate wall; and said supply conduit means being fixedly connected to the top wall of said second wall means for supplying fresh air to said supply chamber directly in the region between said spaced parallel top walls.

Claim 7

A structure according to claim 4, wherein said exhaust conduit means is disposed within and totally surrounded by said supply conduit means, said exhaust conduit means being fixedly secured to the top wall of said first wall means and extending vertically upwardly therefrom, and said supply conduit means being fixedly secured to the top wall of said second wall means and extending upwardly therefrom in surrounding relationship to said exhaust conduit means; and said baffle means further including a substantially U-shaped baffle member fixedly secured to the top wall of said first wall means and projecting upwardly therefrom toward but being spaced from the top wall of said second wall means, said U-shaped baffle member being disposed in partial surrounding relationship to the lower end of said exhaust conduit means and being spaced laterally outwardly a substantial distance therefrom so that said U-shaped baffle member is also spaced lateralLy outwardly relative to an opening formed in the top wall of said second wall means by the lower end of said supply conduit means.

Claim 8

A structure according to claim 4, wherein said baffle means also includes a plurality of baffle plates disposed within said supply chamber directly adjacent said discharge opening, said baffle plates extending between and being fixedly connected to the front walls of said first and second wall means and being disposed laterally along the length of said discharge opening for dividing said discharge opening into a plurality of separate passageways.

Claim 9

A structure according to claim 4, wherein said elongated baffle member has a height adjacent the opposite ends thereof greater than the height in the center portion thereof to restrict the flow thereacross adjacent the opposite ends of the supply chamber.

Claim 10

A structure according to claim 4, wherein said first wall means includes a substantially vertical backwall fixedly secured to the opposite longitudinal edge of said top wall and disposed in substantially parallel relationship to said front wall so that said first wall means has a substantially downwardly directed channel-shaped configuration; said second wall means including a substantially vertical back wall fixedly secured to the opposite longitudinal edge of said top wall and disposed substantially parallel to the front wall so that said second wall means has a substantially downwardly directed channel-shaped configuration, the back wall of said second wall means being spaced outwardly from the back wall of said first wall means whereby the inverted channel-shaped configuration of said second wall means is disposed in surrounding relationship to the inverted channel-shaped configuration of said first wall means; and said supply conduit means and said exhaust conduit means being disposed in surrounding relationship to one another.

Claim 11

A hood structure according to claim 8, including a plurality of upright vanes secured to and extending between the front walls of said exhaust and supply chambers near the lower ends thereof.

Claim 12

A structure according to claim 3, wherein said air moving means comprises a centrifugal fan supported substantially coaxially with said discharge conduit means and an axial flow fan mounted for rotation around an axis substantially perpendicular to the central axis of said discharge conduit means; and wherein said supply conduit means includes an enlarged chamber at the extended end thereof communicating with said axial flow fan.