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US 3,943,836 AGranted
Apparatus for removing fumes from the space above a cooking appliance in a restaurant
AssigneeVent-Cair, Inc.
InventorIrvin R. Kuechler
Life of this patent
Estimating the term…
Abstract
A vortex-type smoke hood, in which the liner of the hood is substantially continuously curved in such manner that the vortex action is improved greatly. One result is that the supply air velocity may be increased by a major amount, without causing "bouncing" of air and fumes out of the hood. The curved wall produces the additional benefit of rendering more smooth the flow path of the inlet air. In a second embodiment, a plate shelf and/or pass-through are combined with the hood, creating a very convenient relationship and one whereby the cook remains highly comfortable.
Claims37
Apparatus for filtering fumes in the space above a cooking appliance in a room which comprises:
- a. wall means to define a capture and entrainment chamber adapted to be disposed above a cooking appliance in a room and to receive grease-laden fumes from said cooking appliance,
- b. grease filter means exposed to said chamber,
- c. blower means to supply air at high velocity directly to said chamber and to draw air and fumes from the side of said filter means remote from said chamber,
- said blower means being connected to effect said supply of air without depleting from said room more than a minor fraction of the air passed through said chamber,
- d. means to direct air from said blower means through said chamber in a high-velocity curtain flowing toward said filter means,
- whereby grease-laden fumes from said cooking appliance are entrained in said curtain and directed toward said filter means, and
- e. means to cause a large portion of the air and fumes from said curtain to flow in a large-diameter high-velocity vortex located above said curtain,
- said last-named means comprising a curved wall shaped to enhance said vortex and to minimize the tendency of air and fumes to bounce or rebound downwardly out of said chamber and into said room.
5 more elements
A vortex-type grease hood for removing grease from the fumes generated by a cooking appliance, which comprises:
- a. wall means to define a capture and entrainment chamber having opening means to admit therein the grease-laden cooking fumes from a cooking appliance,
- b. grease filter means having one side exposed to said chamber,
- c. means to define an exhaust plenum on the side of said filter means remote from said chamber,
- d. blower means to draw air and fumes from said exhaust plenum, and also to supply air to said chamber at relatively high velocity,
- e. director means to cause the air thus applied to said chamber to pass therethrough in a curtain toward said filter means for impingement thereagainst,
- said curtain entraining therein said grease-laden cooking fumes from said cooking appliance, said curtain and said filter means being so related to each other that a large part of the air and fumes in said curtain do not pass immediately through said filter means to said exhaust plenum but instead swerve away from said curtain in a large-diameter high-velocity vortex, and
- f. liner means to guide and enhance said vortex and cause air and fumes therefrom to pass through said filter means to said exhaust plenum,
- said liner means having one region relatively adjacent said filter means and another region relatively adjacent said director means, said liner means being curved between said one region and said other region in order to permit the air velocity in said vortex to be high, and in order to tend to prevent bouncing of air and fumes out of said chamber into the room in which said cooking appliance is disposed.
5 more elements
A grease hood system for use with a room in which a cooking appliance is disposed, which comprises:
- a. wall means to define an open-bottomed capture and entrainment chamber,
- b. grease filters mounted along the rear side of said chamber,
- c. a vortex liner forming part of said wall means and having a rear region located relatively adjacent the upper edges of said filters,
- said vortex liner curving upwardly and forwardly from said rear region and then curving downwardly and forwardly to a forward region spaced a major distance from said rear region,
- d. an extension connected to said forward region of said vortex liner,
- said extension extending rearwardly a substantial distance,
- e. a baffle spaced below said extension,
- f. blower means,
- g. means to define an exhaust plenum on the side of said filters remote from said chamber,
- h. inlet means to conduct air to the space between said extension and said baffle for flow into said chamber, and
- i. means to associate said blower means, said exhaust plenum and said inlet means in such manner that air and fumes are drawn through said filters from said chamber, and air is passed at high velocity to said inlet means for flow into said chamber.
8 more elements
Apparatus for removing grease from the fumes generated by a cooking applicance, which comprises:
- a. wall means to define a capture and entrainment chamber adapted to be disposed above a cooking appliance in a room and to receive grease-laden fumes from said cooking appliance,
- b. grease filter means for removing grease from said grease-laden fumes,
- said filter means being exposed to said chamber,
- c. blower means to supply air at high velocity to said chamber and to said filter means, and to draw air and fumes from the side of said filter means remote from said chamber,
- said blower means being connected to supply a major fraction of said supply of air passed through said chamber from regions exterior to said room, and
- d. vortex means to enhance grease separation by causing a large portion of the air and fumes flowing through said chamber to circulate in a large-diameter high-velocity vortex above said chamber,
- said vortex means comprising a curved wall shaped to enhance said vortex and to minimize escape of air and fumes downwardly out of said chamber and into said room.
4 more elements
Dependencies are inferred from the claim text.