The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2018
Filed:
Jan. 22, 2008
Naoki Shikazono, Tokyo Metropolis, JP;
Kentaro Fukuda, Kariya, JP;
Naoki Shikazono, Tokyo Metropolis, JP;
Kentaro Fukuda, Kariya, JP;
THE UNIVERSITY OF TOKYO, Tokyo, JP;
Abstract
Each finis designed to have continuous lines of wave crestsand continuous lines of wave troughsarranged at a preset angle in a specific angle range of 10 degrees to 60 degrees relative to the main stream of the air flow and symmetrically folded back about folding lines of a preset folding interval W along the main stream of the air flow. A ratio (a/p) of an amplitude 'a' of a waveform including one wave crestand one adjacent wave troughto a fin pitch 'p' satisfies a relation of 1.3×Re<a/p<0.2. A ratio (W/z) of the folding interval W to a wavelength ‘z’ of the waveform satisfies a relation of 0.25<W/z<2.0. A ratio (r/z) of a radius of curvature ‘r’ at a top of the wave crestor at a bottom of the wave troughto the wavelength ‘z’ of the waveform satisfies a relation of 0.25<r/z. The continuous lines of the wave crestsand the continuous lines of the wave troughsare arranged to have an angle of inclination a of not less than 25 degrees at a cross section of the waveform. This arrangement effectively improves the heat transfer coefficient of a heat exchanger and thereby allows effective size reduction of the heat exchanger.