Variable air volume clogged filter detector

Details Variable air volume clogged filter detector Variable air volume clogged filter detector

1981-10-06

1988-06-14

Brigance, Gerald L.

Communications: electrical

Condition responsive indicating system

Specific condition

55274, 73 38, G01N 1508

Patent

active

047515015

ABSTRACT:
A system for detecting a clogged filter in a variable air volume system having a differential pressure sensor for sensing the differential pressure drop across the filter, an air flow sensor for sensing the air flow through the duct in which the filter is located, and a difference sensor connected to the differential pressure sensor and the air flow sensor to indicate when the filter is clogged.

REFERENCES:
patent: 3263403 (1966-08-01), Ladusaw
patent: 3412786 (1968-11-01), Taylor
patent: 3936284 (1976-02-01), Mason
patent: 3939457 (1976-02-01), Nelson
patent: 4033733 (1977-07-01), Nelson
patent: 4050291 (1977-09-01), Nelson
patent: 4249164 (1981-02-01), Tivy
patent: 4311037 (1982-01-01), Gotchel

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