초록 ▼

Air filtration systems and methods which intentionally use collected dust to enhance air filtration performance, use air flow rate control to optimally maintain electro-mechanical efficiency and media permeability, use high velocity discharge to “throw”clean air to preferable workplace areas, and us

Air filtration systems and methods which intentionally use collected dust to enhance air filtration performance, use air flow rate control to optimally maintain electro-mechanical efficiency and media permeability, use high velocity discharge to “throw”clean air to preferable workplace areas, and use a cylindrical drum design for pleasing appearance and practical features. The systems and methods are particularly applicable as modular filtration units to textile processing environments, but are suitable for more general applications as well.

대표청구항 ▼

An air filtration unit comprising: a unit housing formed at least in part of a rigid open mesh material defining an airflow inlet; a motor-driven blower for drawing air into said housing through said rigid open mesh material and for forcibly discharging the air from said housing through a blower out

An air filtration unit comprising: a unit housing formed at least in part of a rigid open mesh material defining an airflow inlet; a motor-driven blower for drawing air into said housing through said rigid open mesh material and for forcibly discharging the air from said housing through a blower outlet; a sheet of filter substrate media positioned on the outside of said rigid open mesh and supported thereby such that unfiltered air is drawn through said filter substrate media to thus expose said filter substrate media and form a mat thereon, and such that a mat thus formed serves as a filtration medium; a controllable media-replenishment device connected to said sheet of filter substrate media for drawing exposed filter substrate media across and off said rigid open mesh at one portion thereof and simultaneously supplying clean filter substrate media at another portion of said rigid open mesh; and control system means connected to said media-replenishment device and responsive to the rate of airflow through said unit for substantially maintaining a predetermined rate of airflow through said media by activating said media replenishment device when sensed airflow decreases; said control system means including means for maintaining an airflow rate such that the permeability of the mat filter is in the order of 200 CFM per ft2 of open area at a static pressure drop of 2 inches WC. A method for operating an air filtration unit including an opening defining an airflow passage, a motor-driven blower for drawing air through the opening and forcibly discharging the air, a sheet of filter substrate media supported over the opening such that unfiltered air is drawn through the filter substrate media to form a mat thereon and such that the mat thus formed serves as a filtration medium, and a controllable media-replenishment device for drawing exposed filter substrate media across and off the opening at one portion thereof and simultaneously supplying clean filter substrate media at another portion of the opening, said method comprising: providing said air filtration unit; sensing the rate of airflow through the opening; and activating the media-replenishment device when sensed airflow decreases to substantially maintain a predetermined rate of airflow, and controlling the airflow rate such that the permeability of the mat filter is in the order of 200 CFM per ft2 of open area at a static pressure drop of 2 inches WC.