DRAINAGE STRUCTURE FOR CORRUGATED-FIN HEAT EXCHANGER

摘要

[Problem] To provide a drainage structure for a corrugated-fin heat exchanger such that said drainage structure takes into account the thickness of heat-exchange tubes and the pitch of the corrugations of corrugated fins and improves drainage. [Solution] A corrugated-fin heat exchanger obtained by: arranging a plurality of mutually-parallel flattened heat-exchange tubes (3) horizontally between a facing pair of header pipes (2a, 2b); joining corrugated fins (4), formed from repeated alternating ridges and furrows, between the heat-exchange tubes (3); and forming drainage channels (10) from louvers (8) created by angled louvering of flanges that extend from the widthwise ends of the heat-exchange tubes (3). The plurality of louvers (8) formed on each heat-exchange tube (3) are lined up at appropriate intervals in the long direction of the heat-exchange tubes (3), and the pitch (P) between the ridges and furrows of the corrugated fins, the vertical width (L) of the louvers, and the thickness (T) of the heat-exchange tubes satisfy the relation P×2 = L = T.