Air filter with a clog-detecting device

Details Air filter with a clog-detecting device Air filter with a clog-detecting device

2008-08-22

2011-12-27

Greene, Jason M (Department: 1776)

Gas separation: apparatus

With signals, indicators, measuring, or testing means

C096S418000, C096S421000, C096S422000, C055S467000, C055S471000, C055S486000, C055SDIG034

Reexamination Certificate

active

08083841

ABSTRACT:
An air filter with a clog-detecting device includes a housing having a wind outlet and a wind intake, a filter unit positioned between the wind outlet and the wind intake, an exhauster disposed between the wind outlet and the filter unit, a magnetic induction unit positioned on the exhauster, and a warning unit assembled on the housing and electrically connected with the magnetic induction unit. A metallic plate is axially fixed on the rotating spindle of a motor and positioned adjacent to the magnetic induction unit, having its upper side formed with at least one projection to enable the magnetic induction unit to induce the metallic plate and produce pulse signals. Thus, by detecting the frequency of the pulse signal, a user can know whether the air filter is clogged or not and proceed to remove the clogged condition to let the air filter continue to work normally.

REFERENCES:
patent: 6723159 (2004-04-01), Cheng
patent: 2007/0001634 (2007-01-01), Wei et al.

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