Heat exchanger having a passage pipe
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United States of America Patent
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Nov 14, 2017
Issued Date -
N/A
app pub date -
May 11, 2011
filing date -
May 21, 2010
priority date (Note) -
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Abstract
An inner fin is a wave fin having board portions extending in a pipe longitudinal direction and a top portion connecting the board portions located adjacent with each other. The wave fin has a wave-shaped cross-section perpendicularly intersecting a pipe longitudinal direction, and the board portion is bent into a waveform extending in the pipe longitudinal direction when seen from a pipe layering direction. A wave pitch WP [mm], a wave depth WD [mm], and a passage width H [mm] are set to satisfy relationships of 2.2≦WP/WD≦4.28 and 0.5≦WD/H≦1.8.
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