| 摘要 |
A serpentine-type aluminum heat exchanger comprising a serpentine-anfractuous flat tube of an aluminum alloy, a plurality of corrugated fin units made of an aluminum alloy having a high aluminum content of 99 wt. % or more, and brazing metal coating layers fixed onto entire flat surfaces of parallel portions of the serpentine-anfractuous flat tube and for joining the flat tube and the fin units, is produced by preparing the serpentine-anfractuous flat tube of an aluminum alloy, the corrugated fin units and U-shaped members of an aluminum alloy brazing filler metal, closely fitting the U-shaped members onto the parallel portions of the flat tube, disposing the fin units in spaces between adjacent U-shaped members fitted onto the parallel portions of the flat tube, and heating the flat tube, the fin units and U-shaped members in the assembled relation to the brazing temperature.
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