| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger exhibiting enhanced heat exchange efficiency and capable of being easily manufactured. SOLUTION: This heat exchanger 10 is provided with a heat transfer pipe 12, and a plurality of fin structures 14 having a plurality of fins 22 arranged along a peripheral direction of the heat transfer pipe 12 and abutted on an inner peripheral surface 28 of the heat transfer pipe 12. The respective fins 22 have a predetermined axial length shorter than a distance to which a boundary layer is sufficiently developed. The plurality of fin structures 14 are arranged in the heat transfer pipe 12 along the axial direction, and a plurality of fins 22a of an arbitrary fin structure 14a are arranged not to be overlapped with a plurality of fins 22b of adjacent other fin structure 14b when being viewed from the axial direction. COPYRIGHT: (C)2007,JPO&INPIT
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