| 摘要 |
A machine for the preparation of beverages, including a brewing assembly (10) adapted to receive an amount or dose of a substance (11) for preparing a beverage, a pump (4) provided with an electric motor (8) for pumping a flow of liquid towards and through the brewing assembly (10); a flowrate detector (6) associated with the pump (4); a microphone sensor (20) adapted to provide electric signals indicating the loudness of the noise generated by the machine (1) during operation, and control circuits (ECU, 15) connected to the microphone sensor (5), the flowrate detector (6) and the pump (4) and designed to activate the pump (4) for preparation of a beverage depending on the signals provided by the microphone sensor (20) and by the flowrate detector (6). |
| 主权项 |
1. Machine for preparing beverages, comprising
a brewing assembly adapted to receive an amount or dose, possibly pre-packaged, of a substance for preparing a beverage, a pump provided with an alternating-current electric motor for pumping a flow of liquid towards and through the brewing assembly; a microphone sensor adapted to provide electric signals indicating the loudness of the noise generated by the machine during operation, and control circuit means connected to the microphone sensor and the pump and designed to drive the motor of the pump for preparation of a beverage in such way as to control the loudness of said noise; the machine being characterized in that it further comprises an electric flowrate detector arranged so as to provide an electric signal indicating the flowrate of said liquid upstream or downstream of the pump and in that said control circuit means are designed to:
analyse the signals provided by the microphone sensor and the flowrate detector,apply to the electric motor of the pump, during testing of the machine while the brewing assembly is in a predetermined condition, an excitation alternating current with predetermined characteristics, and correspondingly detect, by means of the microphone sensor and the flowrate detector, the loudness of the noise and the flowrate of the flow generated by the pump and detect their differences compared to respective predetermined reference values, and modify at least one characteristic of the excitation current to be applied subsequently, during use of the machine, to the motor of the pump depending on said differences detected. |
