Low-profile ventilation hood
AssigneeVent-A-Hood, Ltd.
InventorsWilliam Miles Woodall III, Christopher K. Koontz
Life of this patent
Estimating the term…
Abstract
The present invention provides a method, apparatus and system for safely and efficiently evacuating a ventilation hood having at least one blower unit disposed within a hood. The present invention incorporates an upper plenum frame having an opening in the bottom thereof. A squirrel cage fan is disposed about the opening to draw air down through the upper plenum frame, through a lower plenum, and out an exhaust duct connected to the lower plenum. In certain embodiments, the squirrel cage fan is driven at a speed appropriate to liquefy grease suspended in the heated air.
Claims20
An apparatus for ventilating a hood, the apparatus comprising:
- an upper plenum frame having an opening disposed in the bottom thereof;
- a squirrel cage fan disposed beneath the upper plenum frame, having a center portion and an axis, the axis disposed vertically and the center portion of the squirrel cage fan being disposed about the opening in the upper plenum frame;
- and
- a lower plenum disposed about the squirrel cage fan and having an outlet.
An apparatus for ventilating a hood having an upper inner surface, the apparatus comprising:
- a substantially-rectangular upper plenum frame
- mounted to the hood and disposed substantially parallel to, and a fixed distance from, the upper inner surface of the hood;
- having a circular opening disposed in the bottom thereof;
- a fan motor disposed in the center of the circular opening having an axis disposed vertically;
- a squirrel cage fan disposed about and operably connected to the fan motor, having a center portion disposed about the circular opening in the upper plenum frame;
- and
- a lower plenum
- having a circular inlet disposed in the top thereof connected to the circular outlet of the upper plenum frame and
- having an outlet on the side thereof.
An apparatus for ventilating a hood apparatus having an upper inner surface, the apparatus comprising:
- a substantially-rectangular upper plenum frame
- mounted to the hood and disposed substantially parallel to, and a fixed distance from, the upper inner surface of the hood;
- having a beveled circular opening disposed in the bottom thereof;
- a squirrel cage fan, connected to a fan motor, disposed about the beveled circular opening in the upper plenum frame and having a center portion and an axis disposed vertically;
- a lower plenum disposed about the squirrel cage fan, having an outlet on the side thereof connected to an exhaust duct;
- and
- a speed controller operably connected to the fan motor in such a manner to control the speed of the squirrel cage fan.
Dependencies are inferred from the claim text.