| 摘要 |
PROBLEM TO BE SOLVED: To provide a beverage vending machine, such as a coffee machine, which can adjust flow rate of a beverage flowing out of a beverage preparation chamber continuously.SOLUTION: A beverage vending machine comprises a beverage preparation chamber 2 and a valve which can completely or partially shut off a beverage flowing out of the beverage preparation chamber 2. The valve is of an electrically operated type and is specifically a piezoelectric type valve 3. The piezoelectric type valve 3 is subjected to proportional control by a control unit 5 for adjusting the flow rate of the beverage flowing out of the beverage preparation chamber 2. |
