| 摘要 |
<p>The system comprises a chamber with an inlet (11) for a liquid from a source (20), an outlet (12), and an inlet (13) for a pressurised gas, each with a valve (15, 16, 17). The valves are controlled synchronously in two phases - an intake phase in which the liquid inlet valve (15) is open and the other two valves are closed, and an expulsion phase in which the inlet valve is closed and the other two valves are open, allowing gas under pressure into the chamber to expel the liquid. The chamber can also have a duct (14) at the opposite end to the inlet, connected to a vacuum pump via a valve (18) that opens at the same time as the inlet control valve (15).</p> |
