| abstract |
[PROBLEMS] To easily and surely remove water droplets on a side wall of a reaction vessel. When a suction part (31) enters a reaction vessel (11) and is set at a predetermined position, the suction part (31) is located between an inner wall surface of the reaction vessel (11) and an outer wall surface of the suction part (31). A flow passage 32 is formed between the lower surface and the lower surface. When the washing water runs out in the reaction vessel 11 at the time of drainage, External air flows through the flow passage 32 from the upper end opening of the reaction vessel 11 at a predetermined flow rate or more. The water flowing on the inner wall of the reaction vessel 11 is blown off by the airflow flowing through the flow passage 32, flows downward toward the suction port of the suction part 31, and further passes through the drain tube 26h from the suction part 31. Out into the waste tank. In this way, water droplets adhering to the inner wall of the reaction vessel 11 can be almost completely and easily discharged. |