| 摘要 |
PROBLEM TO BE SOLVED: To provide a reliable heat exchanger, in which crack of an inner tube can be easily found out while allowing production of every complicated passage shape. SOLUTION: This heat exchanger comprises an upwardly opened substantially box-shaped metallic casing 1 including a passage 2 for distributing a first fluid; an inner tube 6 for distributing a second fluid; and a metallic upper lid 7. The casing 1 includes an inflow port 4 through which the first fluid enters and an outflow port 5 through which the first fluid leaves, the inner tube 6 is disposed along the passage 2 within the casing 1, and the upper lid 7 is closely fitted to the casing 1. Consequently, since crack of the inner tube can be easily found out while allowing production of a complicated passage shape, a reliable heat exchanger can be provided. COPYRIGHT: (C)2007,JPO&INPIT
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