| 摘要 |
PURPOSE:To penetrate sterilizing rays even into a deep water tank, by mixing air with recirculated water in a recirculation circuit and this air mixed water is refluxed to a water tank under pressure to be irradiated with ultraviolet rays. CONSTITUTION:A recirculation circuit 3, wherein water in a water tank 1 is taken out to the outside by a water feed pump 2 and again refluxed to said water tank 1, is formed. Air is sent into this recirculation circuit 3 from an air pipe 4 to be introduced into a water pressurizing tank 5 where water is pressurized to be refluxed to the water tank 1. Whereupon, numberless fine air bubbles are generated in the water tank 1. Herein, sterilizing rays of a sterilizing lamp 6 are irradiated. By this method, sterilizing rays are penetrated into the water tank with a water depth of 1m or more to enhance sterilizing effect. |
