| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchange tube that is more rationally composed. SOLUTION: In this heat exchange tube, heat is transmitted to a tube for heat-exchange of medium. Brazing material required for brazing of a top part 310 of an inner fin 300 as a passage parting member with an inner surface of a tube main body part 200 is not clad on first material composing the tube main body part, but clad on second material composing the inner fin. In the heat exchange tube, thickness t<SB>tube</SB>of the tube is 1.2 mm or less, width w<SB>tube</SB>of the tube is 16 mm or less, plate thickness t<SB>1</SB>of the first material is 0.25 mm or less, plate thickness t<SB>2</SB>of the second material is 0.10 mm or less, and equivalent diameter of a passage parted by the inner fin is 0.559 mm or less. In addition, in brazing in a furnace, brazing material provided inside the passage is melted earlier than brazing material penetrating into the passage from the outside, so that choking of the passage is prevented. COPYRIGHT: (C)2005,JPO&NCIPI |
