The invention relates to a device arranged in a circulating fluid pipeline for sterilizing a pipeline fluid by using a sterilization light source, comprising: a tube body, a second transfer tube, an impeller rod, a permanent magnet, an induction coil and a sterilization light source； When the fluid flows from one end of the pipe body to the other end, the fluid drives the impeller rod to rotate, and the permanent magnet and the induction coil induce electric power generation, and the sterilization light source is activated to illuminate the fluid； while the fluid continuously circulates, the device continuously irradiates. The bactericidal effect can avoid the shortcomings of the current circulating fluid using chemical sterilization and the possible side effects； the blades, permanent magnets and germicidal light source are installed on the same straight line of the fluid flow direction, which can reduce the resistance to avoid affecting the flow of the existing pipeline. It also increases the power generation efficiency to enhance the effect of irradiation sterilization.本發明係一種設置於循環流體管路中，使用殺菌光源對管路流體進行殺菌的裝置，其包含：一管體、二轉接管、一葉輪桿、永久磁鐵、感應線圈及殺菌光源；當流體由管體的一端流動至另一端時，流體帶動葉輪桿轉動，並使永久磁鐵與感應線圈感應發電，啟動殺菌光源對流體進行照射殺菌；在流體不斷循環的同時，裝置不間斷的進行照射殺菌效果，可避免目前內循環流體使用化學藥劑殺菌的缺點以及可能產生的副作用；葉片、永久磁鐵及殺菌光源安裝在流體流動方向的同一直線上，可降低阻力以避免影響現有管路的流量，也可提高發電效率以加強照射殺菌的效果。
