PROBLEM TO BE SOLVED: To provide a fluid sterilizer capable of enhancing radiation performance on a light source by a small-sized simple structure.SOLUTION: A fluid sterilizer 1 has a cylindrical body 5 having a flow channel through which a fluid which is a target for sterilization in an axis direction, a light source 3 ejecting ultraviolet light from a front side of a substrate 4 to the fluid, a heat release part 9 having a heat release mechanism placed in a back surface side of the substrate 4, and attached to a terminal of the cylindrical body 5, and a connection part 8 connecting the front side of the heat release part 9 and a terminal side of the cylindrical body 5, and having larger thermal conductivity than the cylindrical body 5.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】小型かつ簡易な構成で光源に対する放熱性能を高めることができる流体殺菌装置を提供する。【解決手段】流体殺菌装置１は、殺菌対象の流体が軸方向に流れる流路を有する筒体５と、流体に対して基板４の前面側から紫外光を出射する光源３と、基板４の裏面側に設けられた放熱機構を有し、筒体５の端部に取り付けられる放熱部９と、放熱部９の前面側と筒体５の端部側とを接続し、筒体５よりも大きな熱伝導率を有する接続部８を備えている。【選択図】図２
