| 摘要 |
PURPOSE:To shorten discharge time by generating a differential pressure between a side space of a liquid feeding path and a non-liquid path of a liquid weighing tank to discharge a weighed liquid in the tank. CONSTITUTION:A liquid feeding port of a liquid feeding path 4 connected to a pump 6 and an undiluted solution tank 5 is opened in the upper end part of a tank 2, and an air hole 10 of an overflow chamber 8 connected to the tank 2 by an overflow path 9 is connected to a clean room 14, and a discharge hole 15 in the bottom part of the chamber 8 is connected to the tank 5. An aspirator part 21 is inserted to an upper end folding part 19 of a liquid discharge path 18 which has a liquid discharge hole 17 in the bottom part of the tank 2, and the aspirator part 21 is connected to a clean air supply source 23 through an air feeding path 22 and a valve 24, and the terminal of the liquid discharge path 18 is connected to a mixing tank 20. The valve 24 is opened to jet air from the aspirator part 21 after the liquid is filled in the tank 2 up to the overflow path 9, and the pressure in the liquid discharge path 18 is made negative to discharge forcibly the liquid in the tank 2 to the tank 20 through the liquid discharge path 18. |
