| 摘要 |
<p>The improvements are characterized in that a set of elements applied to the governing, regulation and control of the distribution operation of each espresso-coffee distribution unit, arranged on the front of the machine, and the relays for activation of the electrovalve associated with each group are supplied at low voltage and connected to an electronic control circuit remote from the coffee-distribution region, hot water or steam. Associated with said electronic circuit is an optical/acoustic level sensor which is also fitted on the front of the machine next to the optical level of the boiler.</p> |
