Patent ID: 7498004

Claim:
A system to disinfect air using ultraviolet radiation (UV), said system comprising: (a) an air inlet tube ( 110 ) comprising an entrance end ( 111 ), a distally opposing exit end ( 112 ), an elongate internal surface ( 121 ) in contact with said air, and an elongate external surface; (b) total internal reflecting features disposed upon at least a portion of at least one of the elongate surfaces of said air inlet tube; (c) an air containment vessel ( 130 ) disposed around said air inlet tube; (d) an ultraviolet inlet window ( 135 ) that allows penetration of said air containment vessel by ultraviolet radiation but prevents passage therethrough of air; (e) a high intensity ultraviolet lamp ( 40 ) providing ultraviolet radiation that passes through said ultraviolet inlet window and impinges upon the internal surface of said air inlet tube; and (f) an air outlet ( 150 ) extending from said air containment vessel.