| 摘要 |
PROBLEM TO BE SOLVED: To reduce the molding time for a ribbed sheet by stacking unit elements formed through the vacuum molding process, punching process and thermal deposition process for forming the ribbed sheet so that ribs of multiple lines cross in turn at each layer to manufacture a heat exchanger. SOLUTION: Ribs 2 of multiple lines are protruded in parallel on one face of one sheet by vacuum molding to form a ribbed sheet 1. Both end sections of the ribs 2 of multiple lines of the ribbed sheet 1 are bridged and connected, a sheet section is punched except for a connecting portion facilitating workability to form a rib connected body. A sheet 5 having a heat transfer property and moisture permeability or only the heat transfer property is fixed to the rib connected body by thermal deposition to form a unit element 4. The unit elements 4 are stacked so that the ribs 2 of multiple lines cross in turn at each layer to form a heat exchanger.
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