| 摘要 |
PROBLEM TO BE SOLVED: To provide a vending machine enabling to accurately determine the leakage of refrigerant when the great amount of refrigerant is released in a relatively short time, without depending on surrounding environment or a load fluctuation. SOLUTION: The vending machine comprises a storage box 13 for storing commercial products, a product storage columns 23-25 via which the commercial products including canned drinks are stored in the storage box 13, and a column thermistor 34 held on the lower part of one of the product storage columns 23-25 for indirectly determining whether the temperatures of the commercial products right before vended are acceptable or not. During cooling the storage box 13, when the speed of reducing the temperature detected by the column thermistor 34 is lower than a predetermined value, the leakage of the refrigerant is determined. Thus, the leakage of the refrigerant can be accurately determined when the great amount of refrigerant is released in a relatively short time, without depending on surrounding environment. COPYRIGHT: (C)2009,JPO&INPIT
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