| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat transfer pipe for an evaporator that can thinly retain a refrigerant between fins and can obtain high heat transfer performance with a small amount of refrigerant. SOLUTION: A single fin part consisting of a fin 10 with a twisting angle ofθ1 and a cross fin part consisting of the fin 10 with the twisting angle ofθ1 and a fin 11 with a twisting angle ofθ2 are formed alternately in the direction of a pipe axis on the outer surface of the heat transfer pipe. As a result, since a refrigerant falls at the cross fin part, the refrigerant is retained thinly between fins, thus obtaining a high heat transfer rate outside the pipe and achieving improved heat transfer performance. Also, since the amount of refrigerant storage can be reduced, a refrigerator can be miniaturized and the circulation load of the refrigerant can be reduced.
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