| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent leak of an internal fluid to an external space via an external fluid passage part. <P>SOLUTION: The heat exchanger is provided with a plurality of tubes 11, and tanks 14, 15 joined to the tubes 11. In outer faces of the tubes 11, hammered out parts 21 protruding from a base plate part 20 in an outward direction of the tubes 11 and extending in a flow direction of an external fluid are numerously formed in a longitudinal direction of the tubes 11. Spaces respectively formed between adjacent hammered out parts 21 and extending in the flow direction of the external fluid compose a multiplicity of the external fluid passage parts 24 carrying the external fluid. Tube insertion holes 14d, 15d for inserting both ends 11a, 11b of the tubes 11 are formed in the tanks 14, 15, and the tube insertion holes 14d, 15d are formed such that rims of the tube insertion holes 14d, 15d overlap a whole area of at least one external fluid passage part 24 on both end 11a, 11b sides of the tubes 11. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
