DOUBLE TUBE FOR HEAT EXCHANGER

WIPO Patent Application WO/2011/162170

A1

A double tube for a heat exchanger, capable of being used without generating noise during operation and allowing the heat exchanger to exhibit excellent heat exchange performance. A double tube (1) for a heat exchanger has a double tube configuration having an inner tube (2) disposed within the outer tube (10) and is used for heat exchange between fluid which flows inside the inner tube (2) and fluid which flows between the inner tube (2) and the outer tube (10). The cross-sectional shape of the inner tube (2) is a triangle having the apexes (21) formed as circular arc curved surfaces, and the positions of the apexes (21) are helically displaced in the longitudinal direction. The cross-sectional shape of the outer tube (10) is that of a smooth circular tube. The inner peripheral surface of the outer tube (10) and the apexes (21) of the inner tube (2) are in contact with each other, and three outer flow paths (31) which are divided in the circumferential direction are formed between the outer tube (10) and the inner tube (2). The inner tube (2) and the outer tube (10) preferably consist of an aluminum alloy or a copper alloy.

JPH0517358	[Name of invention] Double-cylinder heat exchanger
JP5927414	Heat exchanger

MATSUDA SHINICHI (JP)

PCT/JP2011/063870

December 29, 2011

June 17, 2011

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SUMITOMO LIGHT METAL IND (JP)
MATSUDA SHINICHI (JP)

F28D7/10; F28F1/36; F28F21/08

JP2007085595A	2007-04-05
JPS52124346U	1977-09-21
JP2002318015A	2002-10-31
JP2007017079A	2007-01-25
JP2006170571A	2006-06-29

AICHI, Takahashi, Iwakura & Associates (JP)
Patent business corporation あいち international patent firm (JP)

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