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Water purification apparatus provides an elongate ultraviolet lamp extending into a surrounding hollow tube capable of passing ultraviolet light. The lamp and tube are surrounded by a housing, with water inlet and outlet, which provides an annular flow path around the hollow tube through which water

Water purification apparatus provides an elongate ultraviolet lamp extending into a surrounding hollow tube capable of passing ultraviolet light. The lamp and tube are surrounded by a housing, with water inlet and outlet, which provides an annular flow path around the hollow tube through which water may pass for exposure to ultraviolet light. An ultraviolet reflective surface in the annular flow path reflects ultraviolet rays through the water. A unique seal is provided around an open end of the hollow tube to seal the lamp from water in the housing.

대표청구항 ▼

Water purification apparatus comprising in combination: an electrical module having a socket connectable to a source of electricity and upwardly from which extend an elongated ultraviolet light ray emitting lamp; an elongate housing attachable to said electrical module for surrounding said lamp and

Water purification apparatus comprising in combination: an electrical module having a socket connectable to a source of electricity and upwardly from which extend an elongated ultraviolet light ray emitting lamp; an elongate housing attachable to said electrical module for surrounding said lamp and having a water inlet and a water outlet; a hollow elongate tube centrally disposed in said housing, capable of passing ultraviolet rays, closed at one end and opened at the other to permit insertion of said lamp thereinto; an outer annular passage defined by inner and outer cylindrical walls between which is provided filter means, said outer annular passage providing a flow path for water flowing from said housing inlet and said filter means providing filtering of suspended particles from said water prior to exposure to ultraviolet rays from said ultraviolet light; an inner annular passage the inner surface of which is defined by the exterior of said elongate tube and the outer surface of which is defined by said inner cylindrical wall of said outer annular passage spaced therefrom, said inner annular passage providing a second flow path, counter to the flow of said first mentioned flow path, for water flowing through said outer annular passage from said housing inlet for continuous flow to said housing outlet and exposing said water to ultraviolet light rays from said lamp; and a thin sheet of ultraviolet ray reflective material lining said inner cylindrical wall to block ultraviolet rays from said first flow path and to reflect ultraviolet rays passing through said second flow path.