PROBLEM TO BE SOLVED: To provide a fluid sterilization module, in which the formation of a high-velocity part in the fluid flowing through a flow path due to assembly error is suppressed.SOLUTION: The fluid sterilization module 1 comprises: an inner cylinder 21 forming a cylindrical processing flow path 21d extending in the longitudinal direction； an inflow side rectification chamber 26 communicating with the processing flow path 21d through an opening on one end side of the inner cylinder 21； an inflow part 4 for flowing an object into the inflow side rectification chamber 26； an outflow part 5 for flowing out the object that has passed through the processing flow path 21d from the other end side of the inner cylinder 21； and a light-emitting element 34a provided facing the opening on the other end side of the processing flow path 21d and irradiating ultraviolet light along the longitudinal direction toward the object passing through the processing flow path 21d, and in which the inner volume of the inflow side rectification chamber 26 is not less than 2/3 of the cube of the equivalent inner diameter of the processing flow path 21d and not more than the inner volume of the processing flow path 21d.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】組み付け誤差により、流路を流れる流体に、流速の早い部分が形成されることを抑制する。【解決手段】流体殺菌モジュール１は、長手方向に延びる筒状の処理流路２１ｄを形成する内筒２１と、内筒２１の一端側の開口部を介して処理流路２１ｄと連通する流入側整流室２６と、流入側整流室２６に対象物を流入する流入部４と、処理流路２１ｄを通過した対象物を内筒２１の他端側から流出させる流出部５と、処理流路２１ｄの他端側の開口部に面して設けられ、処理流路２１ｄを通過する対象物に向けて長手方向に沿って紫外光を照射する発光素子３４ａと、を備え、流入側整流室２６の内容積が、処理流路２１ｄの相当内径の三乗の２／３以上、処理流路２１ｄの内容積以下である。【選択図】図２
