| 摘要 |
PURPOSE:To obtain dispensing equipment having a mechanism which can remove speedily a gas mixing in a piping system. CONSTITUTION:In filling-type dispensing equipment wherein a liquid is filled inside a piping system 12 and a liquid sample is dispensed by expansion and contraction of a diaphragm 18, a collecting part 31 is provided at the highest part of the equipment. The collecting part 31 is connected to a reservoir 33 through a supply pipe 43 and a return pipe 45, while the reservoir 33 and a second chamber 53 are joined together by a joining pipe 55. A gas mixing inside the piping system 12 forms a bubble, which rises inside the piping system 12 and is collected inside the collecting part 31. When a piston 10b is pushed up in this state, a pressure inside the collecting part 31 is increased, while a pressure inside the reservoir 33 is reduced. Thereby, the bubble collected inside the collecting part 31 moves into the reservoir 33 and thus the bubble can be removed from inside the piping 19 system 12. |
