Patent ID: 7638778

Claim:
An ultraviolet ray sterilization device, comprising a shell; the shell having a lamp support joined on an upper end thereof; an ultraviolet ray lamp tube held in the shell and joined on the lamp support; an inner quartz tube positioned around the ultraviolet ray lamp tube in the shell; the inner quartz tube being in contact with a bottom side of the lamp support at an upper end thereof; an outer quartz tube positioned around the inner quartz tube in the shell; an inner water passage being formed between the inner and the outer quartz tubes; a stainless steel tube positioned around the outer quartz tube in the shell; an outer water passage being formed between the outer quartz tube and the stainless steel tube; a spiral guiding member secured on the lower end of the shell; the spiral guiding member having a plurality of guiding holes to guide water along a spiral path; the spiral guiding member having a water inlet on a lower portion thereof, which communicates with the guiding holes; the outer quartz tube being fixedly positioned around a circumference of the spiral guiding member at a lower portion thereof; a covering member positioned around and threadedly engaged with an outer side of the lower end of the shell; the covering member having a through hole on a lower portion thereof; the water inlet of the spiral guiding member extending through the through hole of the covering member; the covering member having a water outlet hole on a lateral side of the lower portion thereof; and a base joined on the lower portion of the covering member; the base having a water inlet hole communicating with the water inlet of the spiral guiding member; the base having a water outlet hole communicating with the water outlet hole of the covering member.