| 摘要 |
PROBLEM TO BE SOLVED: To outstandingly improve a heat exchange efficiency as compared with a conventional heat exchanger in a heat exchanger having a plurality of flat tubes and a large number of fins connecting them. SOLUTION: A corrugated body surface 12 is formed on an outer side of the flat tubes in which a first fluid flows and a meandering flow passage for a second fluid is formed by the fins 5. The second fluid collides to the corrugated body surface 12 of the flat tube 2 by the meandering flow passage when the second fluid flows along the fins 5 to become a turbulent flow. Since the turbulent flow is contacted with the surfaces of the flat tubes 2 and front and back surfaces of the fins 5, thick boundary layers are not formed on those surfaces and heat transmission is promoted. Therefore, a heat exchange efficiency between the first fluid such as warm water flowing in the flat tubes 2 and the second fluid such as air flowing the outside is outstandingly enhanced. COPYRIGHT: (C)2004,JPO
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