| 摘要 |
<p>The machine to dispense hot beverages, and especially espresso coffee, has a fresh water supply (1), a pump (2), a heat exchanger (3), a water heater (5) linked to the infusion chamber (4) by a boiling water pipe (6), and an outlet (13) for the coffee to a cup (21). The water is initially heated by the heater above its normal boiling point and cooled in the heat exchanger below the boiling point. A steam pipe (8) with a closing valve (10) branches from the boiling water pipe between the heater and the heat exchanger, to take steam for heating a liquid in another cup (22). An overpressure valve (12) is between the infusion chamber and the outlet.</p> |
