Importance

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Abstract

A heat exchanger includes a plurality of flat heat-transfer tubes; and a corrugated fin provided between each adjacent two of the plurality of flat heat-transfer tubes. The corrugated fin is joined to the outer lateral walls of each adjacent two of the plurality of flat heat-transfer tubes at apexes of the wavy shape. The corrugated fin includes fins connecting the apexes and being side by side in an axial direction of the plurality of flat heat-transfer tubes. The fin has a plurality of heat-transfer promoters each having a transfer-promoting projection projecting from a surface of the fin; and an open part provided in the fin. The fin includes, between the plurality of heat-transfer promoters, frost-growing areas each having a through-hole continuous with the open part of a corresponding one of the plurality of heat-transfer promoters.

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First Claim