초록 ▼

A method of filtering air includes the steps of providing a filter element, providing a pair of electrodes sandwiching the filter element, applying a DC electrostatic field to the electrodes to produce attracting forces between particulates and micro-organisms contained in the air and the filter ele

A method of filtering air includes the steps of providing a filter element, providing a pair of electrodes sandwiching the filter element, applying a DC electrostatic field to the electrodes to produce attracting forces between particulates and micro-organisms contained in the air and the filter element, and intermittently applying a sterilizing electrical field concurrently with the electrostatic field. An RF, DC pulse, or AC power supply can be used to generate the sterilizing electrical field.

대표청구항 ▼

[ What is claimed is:] [6.]6. A method of filtering air from airborne micro-organisms, comprising the steps of:providing a filter medium,providing a pair of electrodes sandwiching said filter medium therebetween,directing air stream laden with micro-organisms towards said filter medium,continuously

[ What is claimed is:] [6.]6. A method of filtering air from airborne micro-organisms, comprising the steps of:providing a filter medium,providing a pair of electrodes sandwiching said filter medium therebetween,directing air stream laden with micro-organisms towards said filter medium,continuously applying an electrostatic field between said electrodes, thereby enhancing capturing efficiency of said filter medium,intermittently applying a non-discharging electrical field between said electrodes concurrently with said electrostatic field, each application of said non-discharging electrical field being for a duration sufficient have a sterilizing effect and thereby destroy said micro-organisms collected at said filter medium and in vicinity thereof and further enhancing said capture efficiency of said filter medium, anddirecting air stream purified from said micro-organisms from said filter medium.