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Home water purification system with filter end of life monitor

DC
  • US 5,698,091 A
  • Filed: 09/18/1996
  • Issued: 12/16/1997
  • Est. Priority Date: 03/22/1993
  • Status: Expired due to Term
First Claim
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1. A point of use water treatment system for home use comprising:

  • a pressed carbon block filter for removing particulates and organic contaminants from water, said filter including a filter water inlet and a filter water outlet; and

    a source of radiant ultraviolet energy for receiving water from said filter and killing microorganisms in said water, said source of radiant energy comprising;

    (i) an elongate ultraviolet discharge lamp having an elongate central axis defining an axial direction;

    (ii) a vessel defining an open chamber around said elongate ultraviolet discharge lamp, said vessel containing water flow through said source of radiant energy, said vessel including a source water inlet and a source water outlet, said source water inlet receiving water from said filter water outlet; and

    (iii) directional means proximate said source water inlet for establishing plug-like spiral flow within said open chamber with a substantial axial and tangential component about said elongate ultraviolet discharge lamp, said flow extending between said source water inlet and said source water outlet;

    whereby filtration, water flow, water quality and microbiological kill rates are enhanced.

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