| 摘要 |
PURPOSE:To simplify the structure of an opening and closing system to communicate an air-tight container and an extraction container and cut off them and also to make washing of the system easy. CONSTITUTION:An elastic sheet 10 which shuts the communication between an extraction container 3 and an air-tight container 2 at the time the air-tight container 2 is atmoshperic pressure or higher and allow communication between the extraction container 3 and the air-tight container 2 at the time the pressure of the air-tight container 2 is decreased is set in a filter part 4 which is attached to the bottom of the extraction container 3, and a check valve 12 to discharge steam generated by heating a liquid in the air-tight container 2 to the extraction container 3 is installed in the elastic sheet 10. |
