By a News Reporter-Staff News Editor at Health & Medicine Week -- According to news reporting originating from Alexandria, Virginia, by NewsRx journalists, a patent by the inventors Nakamura, Mitsugu (Kariya, JP); Shimoya, Masahiro (Kariya, JP); Nakabou, Tadashi (Kariya, JP), filed on July 7, 2014, was published online on March 13, 2018 (see also Denso Corporation).
The assignee for this patent, patent number 9915481, is Denso Corporation (Kariya, Aichi-pref., JP).
Reporters obtained the following quote from the background information supplied by the inventors: "Up to now, a corrugated fin is employed as a fin for a heat exchanger, and multiple louvers are cut in and raised from a surface of the corrugated fin along an air flowing direction. A technique in which a heat exchanging performance is improved by changing specifications such as a width of the corrugated fin, fin pitches, or a length of the louvers has been variously proposed (for example, refer to Patent Document 1).
"Incidentally, in the fin for the heat exchanger having the multiple louvers, when the louver pitches are miniaturized to increase the number of louvers, a heat transfer coefficient of the fin is improved by a tip effect of the louvers, and a heat transfer performance can be improved. In recent years, with an advance of manufacturing techniques, the louver pitches can be miniaturized more than conventional manufacturing limitation dimensions.
"However, when the louver pitches are miniaturized, although the heat transfer coefficient is improved, the fin efficiency is reduced, and a heat flow rate emitted from the fin is reduced. This leads to a case in which as a real fin, an improvement in the heat transfer performance attributable to the miniaturization of the louver pitches cannot be sufficiently obtained. That is, in the heat exchanger fin having the multiple louvers, it is difficult to improve the heat transfer performance by merely miniaturizing the louver pitches."
In addition to obtaining background information on this patent, NewsRx editors also obtained the inventors' summary information for this patent: "In view of the above, it is an objective of the present disclosure to provide a fin for a heat exchanger, which is capable of improving a heat transfer performance.
"According to an aspect of the present disclosure, a fin for a heat exchanger is joined to an outer surface of a heat exchange object and facilitates a heat exchange between the heat exchange object and a fluid flowing around the heat exchange object. The fin includes flat portions substantially parallel to a flowing direction of the fluid, a ridge portion connecting adjacent two of the flat portions, and louvers disposed in the flat portions along a flowing direction of the fluid. The flat portions and the ridge portion are corrugated in a sectional surface perpendicular to the flowing direction of the fluid as a whole. The louvers are cut in and raised from the flat portions at a predetermined cut-and-raised angle. A thickness of each flat portion is defined as t, a louver pitch of the louvers is defined as PL, and the thickness of each flat portion and the louver pitch satisfy a relationship of 0.035.ltoreq.t/PL.ltoreq.0.29.
"According to the above configuration, when the thickness of the flat portion and the louver pitches fall within a range of 0.035.ltoreq.t/PL.ltoreq.0.29, the improvement in the heat transfer performance of the fin for the heat exchanger due to the miniaturization of the louver pitches PL can be sufficiently obtained. For that reason, the heat transfer performance can be improved."
For more information, see this patent: Nakamura, Mitsugu; Shimoya, Masahiro; Nakabou, Tadashi. Fin for Heat Exchanger. U.S. Patent Number 9915481, filed July 7, 2014, and published online on March 13, 2018. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9915481.PN.&OS=PN/9915481RS=PN/9915481
Keywords for this news article include: Asia, Japan, Business, Denso Corporation.
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