Air filtration system for ducted range hoods

Details Air filtration system for ducted range hoods Air filtration system for ducted range hoods

1988-08-26

1990-05-01

Hart, Charles

Gas separation

Means within gas stream for conducting concentrate to collector

55106, 55126, 55213, 55274, 55320, 553416, 55472, 55500, 55DIG36, B03C 366, B03C 372

Patent

active

049215094

ABSTRACT:
An air filtration system for removing smoke and grease from cooking exhaust of ducted range hoods is disclosed. In particular, the system includes a coarse filter device fine filter device which substantially remove all of the cooking effluents from the cooking exhaust drawn into the system by a fan powered by a variable speed motor. A sail switch device is connected to the motor and is positioned in the system to determine the flow quantity of the air drawn into the system and to maintain this flow quantity at a substantially constant volume by controlling the speed of the motor device. A maximum speed of the motor is determined by an indicator device signaling an operator to change filters clogged with cooking particles.

REFERENCES:
patent: 3263403 (1966-08-01), Ladusaw
patent: 3886854 (1975-06-01), Culpepper
patent: 3924605 (1975-12-01), Weinman et al.
patent: 4040042 (1977-08-01), Mayer
patent: 4056375 (1977-11-01), Ringel et al.
patent: 4552058 (1985-11-01), Wooldridge
patent: 4655049 (1987-04-01), Andrews et al.
patent: 4786295 (1988-11-01), Newman et al.

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