HEAT EXCHANGER

摘要

PROBLEM TO BE SOLVED: To improve cooling efficiency and corrosion resistance in an evaporator.SOLUTION: A heat exchanger 1 includes: a plurality of tabular fins 2 in which a plurality of through-holes are provided in a row direction parallel with a flow direction of gas and in a stage direction orthogonal to the flow direction of gas, and in which a cylindrical collar part is provided around each through-hole; and a heat transfer pipe 3 which comes into contact with the collar part by penetrating the through-hole and in which a refrigerant passes inside. An outer diameter D of the heat transfer pipe 3 is equal to or greater than 7 mm and equal to or less than 10 mm. A fin pitch Fp of the plurality of tabular fins 2 is equal to or greater than 8 mm and equal to or less than 12 mm. The plurality of tabular fins 2 are arranged in parallel so that the collar part of each tabular fin 2 protrudes in one direction. Out of the plurality of tabular fins 2, an end part of the collar part of one tabular fin 2 of adjacent tabular fins 2 comes into contact with a surface on the opposite side from a surface where the collar part of the other tabular fin 2 protrudes.SELECTED DRAWING: Figure 1