HEAT EXCHANGE PIPE AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2022/196085

A1

Provided is a heat exchange pipe that has an excellent heat exchange performance and in which a metal porous body is inhibited from detaching from a metal pipe.　The present invention is provided with a metal pipe and a metal porous body that is bonded to the inner wall surface of the metal pipe and that is obtained by joining a plurality of metal fibers. A part of the metal porous body is bonded to the inner wall surface of the metal pipe. When, in a cross-section of the metal porous body, the concavity/convexity degree is defined as the (cross-section peripheral length 2/area of cross-section) × 1/(4π) and the linearity is defined as the (cross-section maximum absolute length 2/area of cross-section) × π/4, and the concavity/convexity degree and the linearity are obtained for a vertical cross-section of the metal porous body and fineness, obtained by multiplying the concavity/convexity degree and the linearity, is calculated, the perpendicular fineness perpendicular to the wall surface of the vertical cross-section represented by the following relationship 1 is 1.9 or above. Relationship 1: (Vertical fineness) = (fineness) × cos (2α) α: tilt of metal fiber (note that α = 0 if 45° <α < 135°)

SAIWAI TOSHIHIKO (JP)

PCT/JP2022/001951

September 22, 2022

January 20, 2022

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MITSUBISHI MATERIALS CORP (JP)

B22F5/12; B22F3/11; B22F7/04; B22F7/08; C22C1/08; F28F1/40; F28F13/02; F28F21/08

JP2011007365A	2011-01-13
JPH11132685A	1999-05-21
JPH02154991A	1990-06-14
JP2014141733A	2014-08-07
JP2021143366A	2021-09-24

AOYAMA, Masakazu (JP)

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