CLOSED VESSEL FOR STEAM TREATMENT

PROBLEM TO BE SOLVED: To provide a closed vessel for steam treatment that treats an object article by bringing it into contact with steam under pressure and prevents a poor appearance of the object article while controlling temperature in the vessel.SOLUTION: A closed vessel 10 is equipped with an upper vessel 9 having a dome-shaped ceiling part 9B and a vertical wall part 9A extending from the end part of the ceiling part 9B downward in nearly vertical direction and a lower vessel 8 on which an object article 1 is put. The closed vessel 10 treats the object article by bringing it into contact with steam under pressure after the upper vessel 9 closes the lower vessel 8. A passage of a fluid introduced on the outer wall surface of the upper vessel 9 is formed in the upper vessel 9 so as to avoid the inside W upward in the vertical direction viewed from the object article 1.SELECTED DRAWING: Figure 2 【課題】加圧下において被処理物を水蒸気に接触させて処理することが可能な密閉容器であって、密閉容器内の温度制御を行いつつも被処理物の外観不良を防ぐことが可能な水蒸気処理用の密閉容器を提供する。【解決手段】ドーム形の天井部９Ｂ及び該天井部９Ｂの端部から略鉛直方向下方に沿って延設された縦壁部９Ａを有する上部容器９と、被処理物１が載置される下部容器８と、を備え、上部容器９と下部容器８とにより閉じられた後、加圧下において被処理物１に水蒸気を接触させて処理することが可能な密閉容器１０であって、上部容器９には、当該上部容器９の外壁面に導入された流体の流路が、被処理物１から見て鉛直方向の上方の内側Ｗを回避する態様で形成されている。【選択図】図２