Heat exchanger

Patent metadata

Field	Value
Publication number	US-2018372425-A1
Application number	US-201516066887-A
Country	US
Kind code	A1
Filing date	Dec 28, 2015
Priority date	Dec 28, 2015
Publication date	Dec 27, 2018
Grant date	—

Abstract

Wave-like concaves/convexes are formed on respective flat surfaces of a heat exchange tube, such that crest lines of continuing V shapes in a horizontal direction and trough lines of continuing V shapes in the horizontal direction are alternately arranged and that bends of the V shapes form curve lines. This configuration reduces the stress concentration at the bends in a press-forming process, compared with a configuration that crest lines and trough lines have bends formed in a shape of continuing sharply-angled V shapes in the horizontal direction. As a result, this configuration increases the yield in the press-forming process at a fixed amplitude of the wave-like concaves/convexes and increases the amplitude of the wave-like concaves/convexes at a fixed yield in the press-forming process.

First claim

1 . A heat exchanger configured to perform heat exchange by flowing a fluid on a surface of a heat transfer member,
the heat transfer member comprising wave-like concaves/convexes of smooth curve lines provided on the surface exposed to the fluid, wherein the wave-like concaves/convexes are formed such that crest lines of continuing crests of wave and trough lines of continuing troughs of wave are formed in a shape of continuing V shapes in a horizontal direction, that bends of the V shapes form curve lines, and that a main flow of the fluid flows in a direction perpendicular to the V shapes.

2 . The heat exchanger according to claim 1 ,
wherein the crest line and the trough line are formed by alternately arranging linear portions and arc portions in a continuous manner.

3 . The heat exchanger according to claim 2 ,
wherein the arc portion has a radius that is equal to or larger than one fifth a length of the linear portion.

4 . The heat exchanger according to claim 1 ,
wherein the wave-like concaves/convexes are formed by alternately arranging straight lines and arcs in a continuous manner in cross section.

5 . The heat exchanger according to claim 1 ,
wherein the heat transfer member is a heat exchange tube formed as a flat hollow pipe, and the wave-like concaves/convexes are formed on a flat surface of the heat exchange tube.

6 . The heat exchanger according to claim 1 ,
wherein the heat transfer member is a fin coupled with a heat exchange tube.

Assignees

• Univ Tokyo
• Waki Factory Inc

Inventors

• Yanagimoto Jun
• Shikazono Naoki
• Zeise Pascal
• Wake Tsunehito

Classifications

• F28F1/422

  with outside means integral with the tubular element and inside means integral with the tubular element (F28F1/424 takes precedence) · CPC title

• F28F1/08

  Tubular elements crimped or corrugated in longitudinal section · CPC title

• F28F1/12

  the means being only outside the tubular element · CPC title

• F28D1/05358

  Assemblies of conduits connected side by side or with individual headers, e.g. section type radiators · CPC title

• F28D9/0006

  the plate-like or laminated conduits being enclosed within a pressure vessel · CPC title