| 摘要 |
<p>A mixing, heating and/or frothing device (1) for machines for preparing hot beverages, particularly for preparing cappuccino, comprising a tubular body (2) which defines internally a Venturi tube which extends from an inlet end (3), which can be associated with a source of steam, to an outlet end (6), which has at least one dispensing nozzle (14) for dispensing the beverage, a mixing chamber (7) being defined between the converging portion (4) and the diverging portion (5) of the Venturi tube and being connected to at least one duct for feeding a beverage (8) to be frothed and to at least one duct (11) for feeding ambient air which is drawn into the mixing chamber (7) due to the partial vacuum created by the flow of the steam between the converging portion (4) and the diverging portion (5) in order to emulsify the beverage to be frothed, the ducts (8, 11), moreover, being substantially transverse to the tubular body (2) and the beverage to be frothed and the air being drawn into the mixing chamber (7) due to the partial vacuum created by the flow of steam between the converging portion (4) and the diverging portion (5), the device (1) further comprising flow control means (100) with automatic actuation for the ambient air, which are associated with the air feeding duct (11) to open and close the channel for the passage of the air in the direction of the mixing chamber (7).</p> |
