TUBE WITH SPIRALLY CORRUGATED GROOVE, HEAT EXCHANGER, AND METHOD OF MANUFACTURING TUBE WITH SPIRALLY CORRUGATED GROOVE

摘要

PROBLEM TO BE SOLVED: To provide a tube with a spirally corrugated groove which has high heat transfer performance, a heat exchanger which uses the tube with the groove, and a method of manufacturing the tube with the spirally corrugated groove that can easily perform molding processing on the tube with the groove with a small man-hour.;SOLUTION: A tube with a spirally corrugated groove is characterized in that: a circular tube is provided, on its outer peripheral surface 10, with a radially two-staged deformation part consisting of at least one groove part 11 in a spirally corrugated shape along a longer direction of the circular tube and a radially outer deformation part (hollow 12) of the circular tube formed continuously in a bottom part longer direction of the groove part, and also provided, on its inner peripheral surface 20, with a radially two-staged deformation part consisting of a projection part 21 in a spirally corrugated shape corresponding to the groove part and a radially inner deformation part (projection part 22) formed at the projection part, corresponding to the outer deformation part, and intermittent in a longer direction.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT