PROBLEM TO BE SOLVED: To provide a sterilizer for improving sterilization efficiency while being reduced in size.SOLUTION: In a sterilization device 100 including a housing 110 that has a flow channel R for a fluid to be sterilized, and an LED element 122 that is provided in the housing 110 and applies ultraviolet rays into the flow channel R, the inner wall surface of the flow channel R has a pair of reflecting surfaces (first reflecting surface 111, second reflecting surface 112) that cause the ultraviolet rays applied from the LED element 122 to be reflected multiple times while directing them from one end of the flow channel R to the other, and the first reflecting surface 111 side is provided with a return surface 111a, which is configured from a surface perpendicular to the optical axis of light after being reflected multiple times from one end to the other and which returns the light toward the original direction.COPYRIGHT: (C)2014,JPO&INPIT【課題】小型化を図りつつ、殺菌効率の向上を図った殺菌装置を提供する。【解決手段】殺菌対象となる流体の流路Rを有するハウジング110と、ハウジング110に設けられ、流路R内に紫外線を照射するLED素子122と、を備える殺菌装置100において、流路Rの内壁面は、LED素子122から照射された紫外線を複数回反射させつつ、流路Rの一方側から他方側に向かわせる一対の反射面(第1反射面111,第2反射面112)を有すると共に、第1反射面111側には、前記一方側から他方側に向かって複数回反射された後の光の光軸に対して垂直な面で構成され、当該光を元の方向に向かって折り返す折り返し面111aが設けられていることを特徴とする。【選択図】図3
