| US 7,578,339 B2 | ||
| Heat exchanger of plate fin and tube type | ||
| Kunihiko Kaga, Tokyo (Japan); Shinji Nakadeguchi, Tokyo (Japan); Akira Ishibashi, Tokyo (Japan); Shinichi Wakamoto, Tokyo (Japan); Toshinori Ohte, Tokyo (Japan); Hiroki Murakami, Tokyo (Japan); and Tadashi Saito, Tokyo (Japan) | ||
| Assigned to Mitsubishi Denki Kabushiki Kaisha, Tokyo (Japan) | ||
| Appl. No. 10/557,604 PCT Filed May 21, 2004, PCT No. PCT/JP2004/007396 § 371(c)(1), (2), (4) Date Dec. 26, 2006, PCT Pub. No. WO2004/104506, PCT Pub. Date Dec. 02, 2004. |
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| Claims priority of application No. 2003-146218 (JP), filed on May 23, 2003. | ||
| Prior Publication US 2007/0163764 A1, Jul. 19, 2007 | ||
| Int. Cl. F28F 1/32 (2006.01) | ||
| U.S. Cl. 165—151 [165/109.1] | 9 Claims |
| 1. A heat exchanger including plate fins and tubes comprising:
a plurality of fins stacked at respective intervals; and
a plurality of heat exchanger tubes penetrating each of said fins in a fin-stacking direction, said heat exchanger exchanging
heat between a first fluid flowing inside said heat exchanger tubes and a second fluid flowing outside said heat exchanger
tubes, wherein
each of said fins includes a main body that is substantially planar and a plurality of cut-raised portions extending from
said main body and disposed at an upstream side of flow of the second fluid with respect to said heat exchanger tubes,
each of said cut-raised portions corresponds to a respective heat exchanger tube and includes first and second opposed side
ends connected to the main body of said fin, the first side end is nearer to the corresponding heat exchanger tube than is
the second side end, the first side end is longer than the second side end, and the first side end is disposed at a downstream
side of the flow of the second fluid, facing the corresponding heat exchanger tube,
said cut-raised portions are disposed only within one of a plurality of regions of said fin, and each of said regions is centered
about a respective heat exchanger tube and satisfies
Ws=(1−φ)Dp+φD
1.0≧φ>0.5,
Ws is the width of each of said regions corresponding to respective heat exchanger tubes in a column direction that extends
parallel to an edge of each of said fins,
D is the outer diameter of each of said heat exchanger tubes,
Dp is the pitch of said heat exchanger tubes in the column direction,
no cut-raised portion is present in an area of said fin centered, in the column direction, between adjacent pairs of said
heat exchanger tubes and having a width Wf, in the column direction, satisfying
Wf=φ(Dp−D), and
Wf+Ws=Dp;
each of said cut-raised portions includes first and second opposite edges respectively disposed at the upstream and downstream
sides of the flow of the second fluid, and
each of said first and second edges extends obliquely relative to the column direction.
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