Patent ID: 8083841
Filing Date: 2011-12-27
Classification: B01D,Y10S

Abstract:
1. An air filter with a clog-detecting device comprising: a housing formed with a wind intake and a wind outlet communicating with each other; a filter unit assembled in the interior of said housing and positioned between said wind intake and said wind outlet of said housing; an exhauster installed between said wind outlet of a rear cover of said housing and said filter unit; said exhauster composed of a cover body bored with at least one air intake and an exhaust hole; a motor positioned in said air intake and provided with a rotating spindle; said rotating spindle having one end axially fixed with a fan blade received in said cover body and another end axially secured with a metallic plate; said metallic plate having its peripheral edge formed with at least one projection; said exhaust hole of said cover body communicating with said wind outlet of said rear cover of said housing; said exhauster is provided with a support firmly screwed on said cover body for fixing said motor in position; said support is composed of a ring and four elongate extension members extending diametrically out of its circumference; said extension members threadably secured on said cover body; said motor fixedly screwed on a wall of a center opening of said ring; said metallic plate axially fixed with another end of said motor and exactly positioned in said center opening of said ring; a magnetic induction unit disposed by one side of said metallic plate for inducing each other; said magnetic induction unit producing a pulse signal when said projection of said metallic plate approaches said magnetic induction unit; said magnetic induction unit is an approach switch; and a warning unit assembled on said housing and electrically connected with said magnetic induction unit.