Method and apparatus for ventilating gases containing condensabl

Details Method and apparatus for ventilating gases containing condensabl Method and apparatus for ventilating gases containing condensabl

1991-12-05

1992-11-17

Nilson, Robert G.

Ventilation

Workstation ventilator

Having canopy exhaust hood

126299D, F24C 1520

Patent

active

051638690

ABSTRACT:
A method and apparatus for exhausting a mixture of air laden with droplets and vapors of greases and oils from a room such as a kitchen. A motor-driven fan is mounted within a duct to exhaust the mixture to outside the room. A heater located near the intake of the duct vaporizes any droplets of grease and oil in the air, and then superheats the resulting mixture to a temperature below the ignition point. The exhaust fan motor also drives a separate fan for cooling the motor with air drawn from the outside. The superheat temperature is regulated by the exhaust fan speed and current input to the heater.

REFERENCES:
patent: 2494146 (1950-01-01), Spanos
patent: 2886124 (1959-05-01), Scharmer
patent: 2889007 (1959-06-01), Lunde
patent: 2933080 (1960-04-01), Adey
patent: 3785778 (1974-01-01), Burstein et al.
patent: 3827343 (1974-08-01), Darm
patent: 3911895 (1975-10-01), Van Schoyck
patent: 4235220 (1980-11-01), Hepner
patent: 4987882 (1991-01-01), Kaufman

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