Patent ID: 6932903

Claim:
A dual mode, ultraviolet-and-ozone disinfection apparatus having an improved disinfection effect, which is a part of a water treatment system, the water treatment system being composed of a filter apparatus, the disinfection apparatus, and an ozone suction apparatus, the disinfection apparatus comprising: a disinfection tank having a water inlet and a water outlet; and a disinfection apparatus structure housed in the disinfection tank, including a mercury ultraviolet lamp, which is centered in the disinfection tank and is used to generate UV light after switching on, the UV light including UV light having a wavelength of about 185 nm for generating ozone in the air, and UV light having a wavelength of about 254 nm for disinfecting the water and destroying excessive ozone; a semi-transparent quartz tube that is penetrable by the UV light with wavelength of 254 nm and blocks the UV light with wavelength of 185 nm, the mercury UV lamp being enclosed in the quartz tube with a gap therebetween filled with air, the quantity of ozone generated by the UV irradiation with the wavelength of about 185 nm being more than the quantity of ozone destroyed by the UV irradiation having a wavelength of about 254 nm; a non-transparent ozone transmitting tube impenetrable by the UV light, with an air inlet inserted in the gap between the mercury UV lamp and the quartz tube, the air in the gap generating ozone through the irradiation by UV light, the ozone being drawn into the ozone suction apparatus through the ozone transmitting tube; a translucent UV light impenetrable spiral water transmitting tube, enclosing the quartz tube in a spiral manner with one end of the tube connected to the water inlet while the other end is connected to the water outlet, so that the ozonated water transmitted through the water inlet from the ozone suction apparatus mixes homogeneously, and a sleeve barrel enclosing an exterior part of the spiral water transmitting tube, one end of the sleeve barrel being closed off at the top of the disinfection tank and the other end having an opening facing the bottom of the disinfection tank; whereby, water flowing out of the spiral water transmitting tube creates a return flow from the downstream flow impact, the water then flows back to surround the quartz tube along the exterior of the spiral tube and through a gap between the pitch of the spiral shape and the sleeve barrel, and all along the path of the Water around the quartz tube, the water is exposed to UV irradiation having a wavelength of about 254 nm penetrating through the quartz tube, and at last, water that flows out of the disinfection tank is available for drinking water.