Patent attributes
A beverage preparation machine (1) comprises a source of liquid (2,3) and a dispensing outlet (4) connected via a pump (10) that includes a chamber (11) and a displaceable wall (12) delimiting the chamber (11). The pump (10) further has: an electric actuator (13) driving the displaceable wall (12) for causing an inflow of liquid from the source into the chamber (11) and for causing an outflow of liquid from the chamber (11) to the dispensing outlet (4); and a powering unit (14) that comprises an electric power source (142) and that is configured for supplying power to the actuator (13). The powering unit (14) further comprises: a sensor (143) for measuring an electrical parameter representative of a consumption of power by the actuator (13); and a control unit (144) that is connected to the sensor (143) and to the electrical power source (142) and that is configured to control the power supplied to the actuator (13) by the electric power source (142) as a function of: the measured parameter; and a desired liquid input into the chamber (11) and/or liquid output from the chamber (11), such as a desired flow and/or pressure of the liquid input and/or of the liquid output.
