FINNED HEAT EXCHANGER AND METHOD OF MANUFACTURING THE SAME

摘要

A finned heat exchanger, comprising a front side heat exchanger (20) and a rear side heat exchanger (40). Each of the front side heat exchanger and the rear side heat exchanger further comprises a large number of fins (21, 41) arranged parallel with each other at specified intervals and a large number of heat transfer tubes (11) inserted into the fins generally perpendicular to the fins and allowing refrigerant to flow therein. The fins of the front side heat exchanger are so formed that each of the upstream side leading edge (22, 23) thereof and the downstream side trailing edge (32, 33) thereof is formed in bent shapes by two straight line parts forming a same obtuse angle and a curved part line part (24, 34) connecting these two straight lines to each other, and that a distance (B) between the upstream side leading edge and the downstream side trailing edge in an area near a once- through blower (5) among two areas held by the linear upstream side leading edge and the linear downstream side trailing edge of the fins is made shorter than a distance (A) between the upstream side leading edge and the downstream side trailing edge in an area apart from the once- through blower.