Locally inverted fin for an air conditioner

Details Locally inverted fin for an air conditioner Locally inverted fin for an air conditioner

1986-05-06

1987-11-10

Davis, Jr., Albert W.

Heat exchange

Radiator core type

Side-by-side tubes traversing fin means

165152, F28D 104

Patent

active

047051051

ABSTRACT:
A generally corrugated fin of a finned tube heat exchanger is formed to have a plurality of cylindrical collars that fit closely around tubes containing a first fluid, for good thermally conductive contact therewith. The collars are arrayed in rows along the corrugations and, within each local fin region between adjacent collars, cuts are provided parallel to and between adjacent crests and troughs, with a portion of each crest locally inverted to form a local trough and each trough inverted to form a local crest between successive cuts. A second fluid flowing outside the tubes between adjacent fins is thereby enabled to form numerous short boundary layers and to flow from one side of each fin to the other, thereby promoting turbulence and flow-mixing that enhance heat transfer between the two fluids. In a preferred embodiment of the fin, two parallel local cuts are provided between each crest and trough and the strip between each pair of cuts is formed into a louver having a substantial portion parallel to the closest surface of the adjacent inverted local crest and trough on either side.

REFERENCES:
patent: 2079032 (1937-05-01), Opitz
patent: 3003749 (1961-10-01), Morse
patent: 3796258 (1974-03-01), Malhotra et al.
patent: 4034453 (1977-07-01), Tomita et al.
patent: 4038061 (1977-07-01), Anderson et al.
patent: 4300629 (1981-11-01), Hatada et al.
patent: 4365667 (1982-12-01), Hatada et al.
patent: 4434844 (1984-03-01), Sakitani et al.
patent: 4469167 (1984-09-01), Itoh et al.
patent: 4469168 (1984-09-01), Itoh et al.
patent: 4480684 (1984-11-01), Onishi et al.
patent: 4593756 (1986-06-01), Itoh et al.

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