PROBLEM TO BE SOLVED: To provide a liquid food sterilization device using a plate-type heat exchanger or a tube-type heat exchanger, wherein problems of easy generation of denatured substance during sterilizing treatment, and difficulty in cleaning the denatured substance (contamination).SOLUTION: The liquid food sterilization device comprises a flow path with its upper side open, a supply part supplying liquid food to the upstream side of the flow path, and an infrared emission body irradiating the liquid food flowing through the flow path with the infrared radiation. The flow path is inclined so as to get lower toward the downstream side from the upstream side. The angle of the inclination &alpha of the flow path is preferably 1-5 degree(s), the width-direction cross sectional surface of the bottom face of the flow path is preferably formed into a linear state, and the cross sectional surface of the bottom face of the flow path may have unevenness.COPYRIGHT: (C)2008,JPO&INPIT【課題】プレート型熱交換器やチューブ型熱交換器を用いた殺菌装置においては、殺菌処理中に変成物が生じ易い点と、変成物(汚れ)を洗浄し難い点である。【解決手段】上側が開口している流路と、該流路の上流側に液状食品を供給する供給部と、該流路を流れる液状食品に赤外線を照射する赤外線放射体とを備え、該流路は上流側から下流側に向けて低くなるように傾斜している。前記流路の傾斜角αは1~5度が好ましく、前記流路の底面の巾方向断面は直線状になっていることが好ましく、前記流路の底面の断面は凹凸を有していてもよい。【選択図】図1
