| 摘要 |
The device (10) has a mixing device for mixing steam, milk and air. The mixing device comprises a first line, a second line and a third line for supply of milk, steam and air into a chamber. A valve comprises an adjustable regulating shaft for regulating supply of milk and air into the chamber by adjusting the regulating shaft. A drive motor adjusts the regulating shaft of the valve, and a control device (35) controls the drive motor, where the regulating shaft is moved by controlling the drive motor by the control device into respective predetermined positions. |
