Device for the output of a deodorizing substance into an air stream particularly in vapor exhaust hoods in kitchens

• US 4,444,720 A
• Filed: 12/30/1981
• Issued: 04/24/1984
• Est. Priority Date: 01/08/1981
• Status: Expired due to Fees

• Current Assignee: GEBR Mayer KG
• Original Assignee: GEBR Mayer KG
• Inventors: Mayer, Horst
• Primary Examiner(s): RICHMAN, BARRY
• Application Number:
  US06/335,842
• Time in Patent Office: 846 Days
• Field of Search: 422/124, 422/4, 422/119, 62/78, 98/30, 98/109, 55/DIG. 36
• US Class Current: 422/119
• CPC Class Codes: F24C 15/2035 Arrangement or mounting of filters F24C15/2021 takes precedence; filters per se B01D46/00
• CPC Class Codes: Y10S 55/36 Kitchen hoods

Abstract

In a device for releasing an odor-destroying substance into an air stream, such as for use with a kitchen exhaust hood, a refillable reservoir has an open side covered by a hood-shaped wall with flow openings through the wall. A cover disk extends over the hood-shaped wall on the opposite side from the reservoir for adjusting the flow openings, the hood-shaped wall affords a forced guidance of at least a part of the air stream past the open side of the reservoir.

Claims

1. In a device for the release of an odor-destroying substance into an air stream, such as for kitchen vapor exhaust hoods, comprising a vapor exhaust hood having a vapor inlet side and a vapor outlet side, a suction grid located in the vapor outlet side of said vapor exhaust hood, wall means for forming a reservoir for an odor-destroying substance located within said vapor exhaust hood in the path of air flowing from the vapor inlet side to the vapor outlet side of said hood, said reservoir being open on the side thereof facing toward the vapor outlet side of said hood, wherein the improvement comprises means forming a support for said reservoir and defining a central axis extending generally perpendicularly of said suction grid for supporting said reservoir within said hood, said wall means comprises an annular trough forming the reservoir and encircling said central axis and having an open side facing toward said vapor outlet side and being closed on the side facing said vapor inlet side, said annular trough having a closed wall defining the radially outer boundary thereof, a felt filling located within said trough for receiving the odor-destroying substance, a hood-shaped wall extending over the open side of said annular trough and including a flat plate extending generally parallel to and spaced from said suction grid within said hood, and an annular edge extending from said flat plate toward said vapor inlet side and spaced radially outwardly from said closed wall of said annular trough forming in combination with said closed wall an annular flow channel so that air can flow from the vapor inlet side of said hood over the open side of said annular trough, said flat plate having flow openings therethrough located opposite said annular trough, a cover disk in contact with the side of said flat plate closer to said suction grid and being concentric relative to said central axis, said cover disk having openings therethrough and being movable about said central axis relative to said flat plate for selectively opening and closing the flow openings in said flat plate, said cover disk being adjustably spaced from said suction grid and forming in combination with said suction grid an adjustable space therebetween whereby air flowing over the open side of said trough passes through the flow openings in said flat plate and the openings in said cover disk into the adjustable space and then through said suction grid, means located within said wall means for providing an indication of the level of the odor-destroying substance within said annular trough, said means for indicating the level includes electric switching contacts disposed in spaced apart relation when the odor-destroying substance within said annular trough is above a certain level, said annular trough containing the odor-destroying substance is arranged to act in the direction of gravity based on the amount of odor-destroying substance located within said trough, and a spring located within said wall means and acting against the force of gravity for effecting the closing of said electric switching contacts when the odor-destroying substance within said annular trough falls below a certain level, said cover disk has a filling opening therein for filling odor-destroying substance into said felt filling in said annular trough, and said flat plate has a corresponding filling opening therethrough and said filling opening in said cover disk is movable into and out of alignment with said filling opening in said flat plate.