Abstract: At present, the quality of drinking water is attracting more and more attention for people. Many families choose to install the reverse osmosis water purification machine. When used for a long time, the end pipes of the machine will breed bacteria, viruses and other microbes. Thus, adding an ultraviolet sterilizer at the end of the water purification machine, is an effective method to improve the drinking water quality. This paper talked the microbiological safety of drinking water, also analyzed the principle of ultraviolet sterilizer. This will promote the development of ultraviolet sterilization technology in the field of household water purifiers. The ultraviolet sterilizer not only will bring health drinking water to the consumers, but also provide more convenient performance.

Key words: Ultraviolet sterilization, Reverse osmosis, Water purification machine, Application research