Patent ID: 8246839

Claim:
A double-walled chamber for the UV disinfection of liquids comprising: an inlet connection; an outlet connection; an outer pipe having a circular cross-section; an inner pipe having a substantially rectangular cross section in which at least one UV radiation source is disposed and having a sealing cover in at least one end thereof, a downstream end of said outer pipe enclosing a downstream end of said inner pipe, the cross sectional shape of the outer pipe and the cross sectional shape of the inner pipe differing from one another, wherein the entrance of the liquid into the inner pipe with the radiation devices occurs through an intermediate space defined between the outer pipe and the inner pipe, the 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 therein 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 before entering said plurality of inlet openings, and (ii) radial side flow movement of the liquid substantially through said inner pipe; and the intermediate space being configured to retain the liquid therein except for the liquid flowing through the plurality of openings.