| 摘要 |
PROBLEM TO BE SOLVED: To improve cooling performance by increasing a heat transfer area without increasing the occupied space of an evaporative coil of a refrigerator and reducing an influence on a heat transfer property due to the oil film adhesion of refrigerator oil. SOLUTION: In a beverage cooling water tank or the cooling unit of ice machine mounted on a cup type automatic beverage vending machine supplying a cold beverage into a cup and sells it, the heating area within a tube to be a refrigerant path by constructing the evaporator of the refrigerator included in cooling water and the ice machine with the evaporative coil forming many lined grooves 19a on inner circumferential surface of a refrigerant tube 19 is increased and the oil film quantity of refrigerator oil sticking to its tube wall per unit area is also reduced to suppress the decline of a heat transfer property so that the cooling performance of the refrigerator can be improved. |
