| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchange unit capable of efficiently performing welding between members and surely keeping the water-tightness between different fluid passages by partially improving an isolating structure between opening parts in heat transfer parts in an integrated state. SOLUTION: Substantially platform-like flat parts 12 are formed on two sides of a plurality of heat transfer parts integrated in a parallel arrangement state, an outer auxiliary member 20 and an inner auxiliary member 30 having substantially tooth-shaped parts 21 and 31 laid along the inside and outside of one opening part end formed of the clearance between the flat parts 12 in each heat transfer part are erected in the arrangement direction of the heat transfer parts, and the tooth-like parts 21 and 31 inserted to each clearance of the heat transfer parts are mutually welded to fill up the clearance between the tooth-like parts 21 and 31 by melting integration for every heat transfer part. According to this, a state that one opening part is isolated from the other adjacent clearance part can be surely obtained in a weld joint part where each heat transfer part is integrated with the auxiliary members 20 and 30, and the connecting strength between the heat transfer parts can be significantly improved. COPYRIGHT: (C)2006,JPO&NCIPI
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