Patent ID: 7691343

Claim:
A double-walled chamber for the UV disinfection of liquids comprising: an inlet connection; an outlet connection; an outer pipe having a cylindrical cross-section; an inner pipe completely enclosed by said outer pipe, said inner pipe having a non-circular cross-section and configured to hold a plurality of UV radiation sources disposed in an array substantially corresponding to the inner pipe non-circular cross-section, ends of the radiation sources being sealed exteriorly of said inner pipe; a plurality of inlet openings disposed at an end of said inner pipe and configured to cause (i) liquid flowing through said inlet connection to flow through the intermediate space between the outer pipe and the inner pipe before entering said plurality of inlet openings, and (ii) radial side flow movement of the liquid substantially through said inner pipe; and a separating wall disposed at another end of said inner pipe and configured to retain the liquid in said intermediate space except for the liquid flowing through the plurality of openings.