| 摘要 |
<p>A system of control valves especially for a filter coffee machine in which the hot water is dosed into a brew chamber (18) into which is placed a coffee bag. The valve system (6) has a bypass valve which is open at low pressures and which is blocked at the higher operating pressures to feed hot water into the brewing chamber. The design is improved by a second bypass valve which operates at pressures above the operating pressure range.</p> |
