| 摘要 |
Espresso coffee machine of the type involving: a hot water/overheated vapour closed circuit, that is heated by a heat exchanger (2) in a boiling water boiler preferably under pressure (1), where said closed circuit (2, 21, 22, 23) passes at least in a delivering device (4) of percolation (43); a cold water circuit (3) that is injected in adjusted way (37) within said heat exchanger (2) to supply in said closed circuit the water delivered in said deliverer (4, 43), characterised in that said cold water circuit (3) is made substantially to pass (35) upstream of said percolation (43) in said delivering device (4) in a way adjusted to check on the exit temperature of the water/overheated vapour in said percolator (43).
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