US 2007/0163764 A1Published application

Heat exchanger of plate fin and tube type

AssigneeMitsubishi Denki Kabushiki Kaisha

InventorsKunihiko Kaga, Shinji Nakadeguchi, Akira Ishibashi, Shinichi Wakamoto, Toshinori Ohte, Hiroki Murakami, Tadashi Saito

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Abstract

A heat exchanger including plate fins and, the tubes fins being stacked at respective intervals relative to one another, and heat exchanger tubes penetrating the fins in a fin-stacking direction. The heat exchanger exchanges heat between fluids flowing, respectively, inside and outside the heat exchanger tubes, through the heat exchanger tubes and the fins. Each of the fins includes cut-raised portions with a bridge shape having leg and beam segments. The cut-raised portions associated with each of the heat exchanger tubes are located substantially only in a region of the fin satisfying Ws=(1−φ)Dp+φD φ>0.5, where Ws is spread width of the cut-raised portions in a direction (column direction) extending along an end of the fin on the upstream side of the second fluid, and D is outer diameter of the heat exchanger tube. Dp is alignment pitch of the heat exchanger tubes in the column direction.

Claims9

Dependent claims

A heat exchanger including plate fins and tube comprising:

a plurality of fins stacked at respective intervals, and
a plurality of heat exchanger tubes penetrating said fins a fin-stacking direction, said heat exchanger exchanging heat between a first fluid inside said heat exchanger tubes and a second fluid outside said heat exchanger tubes, through said heat exchanger tubes and said fins, wherein
each of said fins includes a plurality of cut-raised portions, at least one cut-raised portion corresponding to each of said heat exchanger tubes and being disposed substantially only within a region of said fin satisfying
Ws=(1−φ)Dp+φD
φ>0.5,
Ws is entire spread width of said at least one cut-raised portion corresponding to each of said heat exchanger tubes in a column direction that extends along an end of said fin on an upstream side of the second fluid,
D is an outer diameter of each of said heat exchanger tubes, and
Dp is alignment pitch of said heat exchanger tubes in the column direction.

5 more elements

Dependencies are inferred from the claim text.