Patent ID: 6030186
Filing Date: 2000-02-29
Classification: F04D,F24F

Abstract:
An apparatus for minimizing noise from a fan filter unit, said fan filter unit comprising at least a fan blower disposed on a base plate, a top housing coupled to said base plate with an inlet opening for drawing air therethrough, and side housing coupled to said top housing for enclosing the fan filter unit, said side housing further having an outlet opening through which air is discharged, said apparatus comprising:at least a pair of S shaped guides disposed on said base plate within said fan filter unit and circumferentially of said fan blower for receiving air discharged therefrom;at least a pair of perforated baffles disposed within the fan filter unit and at output of said S shaped guides for diffusing the airflow therefrom;at least a pair of curved baffles disposed within said fan filter unit and adjacent to said perforated baffles for directing airflow blow said base plate; andat least one V shaped baffle disposed on the underside of said base plate for distributing evenly the airflow,whereby the noise from said fan filter unit is minimised without introducing contaminants in the airflow flowing therethrough.