| 摘要 |
PROBLEM TO BE SOLVED: To efficiently clean a storage tank inside surface by a small quantity of water by arranging a cleaning nozzle in a bottom part in a storage tank to store plural cups of beverage of an automatic vending machine or the like, and injecting it toward a ceiling surface of the storage tank from a water injection hole by supplying pressurized water to the cleaning nozzle. SOLUTION: In the case of cleaning the inside of a storage tank 13 of an automatic vending machine to sell coffee or the like by a cup, a control device supplies hot water in the storage tank 13 through a deriving tube 31 from a hot water tank by opening a hot water valve, but a hot water quantity at this time is set to a quantity of a degree that a water injection hole 45 of a cleaning nozzle 44 sinks under the water. Next, a pump is operated, and pressurized water is injected toward a ceiling surface 13C of the storage tank 13 from the water injection hole 45 of the cleaning nozzle 44 through a cleaning tube. Water injected at a high speed from the water injection hole 45 of the cleaning nozzle 44 collides with the ceiling surface 13C of the storage tank 13 as a thin water column, and changes the direction in the side wall 13B direction of the storage tank 13, or scatters, and cleans an inside surface of the storage tank 13. After claning is finished, wash water is discharged through a pipe. |
