Method for prevention of infectious pathogenic viruses
PCT No. PCT/NO94/00194 Sec. 371 Date Jan. 17, 1997 Sec. 102(e) Date Jan. 17, 1997 PCT Filed Dec. 1, 1994 PCT Pub. No. WO95/17634 PCT Pub. Date Jun. 29, 1995A device used in an air purifying system. The device includes an ultraviolet radiation source, a pre-filter, and a post-filter. The pre-filter is arranged adjacent to the ultraviolet light source such that the pre-filter is irradiated by the ultraviolet light source to destroy bacteria, virus, or other organisms on the pre-filter. The device also includes a cover that is movable between an open and closed position. In the closed position, the device operates in a passive mode to irradiate air within the device and to filter air through filters in the device. In the open position, the device operates in an active mode to irradiate an area external of the device and to simultaneously filter air through a filter in the device.