| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure capable of adjusting a flow rate widely in a simple device capable of flowing out a small flow rate liquid from a constant volume container to an open atmospheric state stably for a long period of time by controlling in a prescribed flow rate. SOLUTION: This device for feeding a prescribed small flow rate liquid has a container 22 having a constant volume, capable of housing a liquid and arranged with an opening part facing downward, a flowing out hole 14 for the liquid communicating with the opening part and a bubble-generating pipe 16, is provided by arranging an exuding member 15 for reducing the effect of the surface tension of air and water at the flowing out hole and also capable of adjusting the perpendicular distance of the bubble-generating end toward the flowing out hole of the liquid so as to be able to hold a pressure associated with the flowing out of the liquid against the effect of the surface tension of the liquid making a contact with air as a necessary constant value, and further an exchangeable capillary 33 in the tubular passage connected to the bubble- generating pipe for introducing an atmosphere to provide a means for controlling the introduced air flow rate. |
