Device for the detection of the clogging of an air filter

Details Device for the detection of the clogging of an air filter Device for the detection of the clogging of an air filter

1993-04-13

1995-07-04

Chiesa, Richard L.

Gas separation

With nonliquid cleaning means for separating media

Solid agent cleaning member movingly contacts apparatus

55274, 55309, 553853, B01D 35143

Patent

active

054296498

ABSTRACT:
A device for the detection of an air filter having an auxiliary air duct opening upstream and downstream of the air filter so as to generate in the auxiliary duct an air flow due to the head loss of the air filter and having a velocity varying in accordance with the head loss; and an electronic circuit delivering from the signals of first and second sensing devices, a signal representative of a limit clogging of the air filter when the air flow speeds within a main duct and the auxiliary duct are differing by a determined value corresponding to a limit head loss of the air filter, the device being applicable to air conditioning equipments fitting automotive vehicles.

REFERENCES:
patent: 3790931 (1974-02-01), Leveraus
patent: 4006511 (1977-02-01), Larsen
patent: 4050291 (1977-09-01), Nelson
patent: 4356007 (1982-10-01), Bowman
patent: 5141309 (1982-08-01), Worwag

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