Air purification systems

Claim 1

A ventilating hood and duct structure for use with cooking stoves and the like including a downwardly open hood having front, rear and side wall portions, an upwardly open trough positioned within said hood at the lower portion of said hood and extending around the front, rear and side wall portions of said hood, said trough defining the margins of an open inlet between portions of said trough and formed and adapted for a superimposed vertical alignment with the fire area of a cooking stove, an outlet duct fixed to the upper portion of said hood and communicating with the interior of said hood, means for inducing air flow through said inlet and to said outlet, a baffle surface positioned above said trough and extending over the entire air flow area of the front, rear and side wall portions of said trough and in overlying and spaced relation to the trough and the open inlet, said baffle extending from the rear wall of the hood toward the front wall and being spaced from said front wall to define a flow space between the front edge of said baffle and said front wall, said baffle being downwardly and forwardly inclined with respect to the front and rear walls of said hood, nozzle means directed towards the front wall and spaced above said baffle within said hood for directing a water spray between the front wall of said hood and the upper surface of said baffle to provide a water scrubbing curtain between said baffle and said trough and a secondary water scrubbing action between said front wall and said baffle, the forward edge of said baffle being positioned over the portion of said trough at the front of said hood, said water spray providing a cooling and washing effect on the front wall portion of said hood and on said baffle.