| 摘要 |
PROBLEM TO BE SOLVED: To realize a small space, low cost and long life of an automatic beverage delivery unit. SOLUTION: A gear pump 26 is used as the means to deliver warm water and air to a nozzle 9. At a point of a pipe 24 to deliver warm water and air to the gear pump 26, a valve 28 is attached to switch warm water and air. A return circuit 36 is branched from a point of the delivery pipe 32 between an orifice 34 and the gear pump 26 to a point of the pipe 24 between the gear pump 26 and the valve 28. At a midway point of the return circuit 36, a constant pressure valve 38 is attached. |
