HEAT EXCHANGER ARRANGED IN CEILING-BURIED AIR CONDITIONER, AND CEILING-BURIED AIR CONDITIONER

摘要

Disclosed is a heat exchanger (100) comprising plate fins (1) laminated at an interval, and a heat transfer pipe (2) inserted vertically into the plate fins (1) and formed to have a plurality of straight pipe portion (2s) and bent pipe portions (2r) for causing the end portions of the straight pipe portion (2s) to communicate with each other. The plate fins (1) are cut and raised to form first slit fins (3a) protruding to the side of one face and second slit fins (3b) protruding to the side of the other face. The straight pipe portions (21a) are arranged zigzag and in parallel to each other such that the 'step pitch (Dp)' or the interval between the individual axes in the step direction and the 'row pitch (Lp)' or the interval in the row direction have relations of '4 mm = D = 6mm, 14 mm = Dp = 17 mm, and 7 mm = Lp = 10 mm' with respect to the external diameter (D) of the heat transfer pipe (2).