| 摘要 |
PROBLEM TO BE SOLVED: To improve evaporating coil piping structure for an evaporator capable of controlling the increase of windage and the impairing of cold insulation performance of the evaporator caused by frost formation on an evaporating coil and a fan. SOLUTION: In this cold air circulation type show case wherein a refrigerant is supplied to the fin tube type evaporator 6 of a refrigerating machine mounted in an inside cold air circulation passage through high pressure-side refrigerant piping 10 and an expansion valve 9, and the air exchanging heat with the evaporator is circulated and distributed inside to keep displayed articles cold, an evaporating coil part at an air inlet end side (lower end side of evaporator) of the evaporating coil 6a arranged while meandering over the whole area of the evaporator 6 is a fin-free bare pipe 6a-1, the liquid refrigerant is supplied to the bare pipe through the expansion valve 9, and a piping route of the evaporating coil in the whole evaporator is determined in such manner that a coil part continued from the bare pipe is once led to an air outlet side (upper end side of evaporator) of the evaporator, and then successively arranged while meandering toward the air inlet side, and its terminal end is connected with low pressure-side refrigerant piping 11. COPYRIGHT: (C)2007,JPO&INPIT
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