HEAT TRANSFER TUBE, HEAT EXCHANGER, AND AIR CONDITIONER HAVING HEAT EXCHANGER

PROBLEM TO BE SOLVED: To provide a heat exchanger applying a heat transfer tube capable of performing heat exchange of high efficiency by improving adhesiveness with radiation fins by tube expansion and improving draining performance, and to provide an air conditioner having the heat exchanger. SOLUTION: This heat transfer tube is composed of two circular tubes 3a, 3b arranged in parallel with each other in the long axial direction in the cross-sectional shape, and outer wall sections 3c, 3d for joining two circular rubes 3a, 3b to each other in the short axial direction in the cross-sectional shape, a distance B between the outer wall sections 3c, 3d is longer than outer diameters d of the circular tubes 3a, 3b, and a distance C between central axes of two circular tubes 3a, 3b is longer than the outer diameters d of the circular tubes 3a, 3b and is less than two times of the outer diameter d of the circular tubes. COPYRIGHT: (C)2011,JPO&INPIT