Heat exchanger

Patent metadata

Field	Value
Publication number	US-2017311480-A1
Application number	US-201515516915-A
Country	US
Kind code	A1
Filing date	Aug 18, 2015
Priority date	Oct 28, 2014
Publication date	Oct 26, 2017
Grant date	—

Abstract

A heat exchanger has a tube and an inner fin. A heat medium exchanging heat with a heat exchange target flows in the tube, and the tube has a flat shape in cross section perpendicular to a flow direction of the heat medium. The inner fin has first fins and second fins. The second fins are formed parallel to the flow direction in at least one of an upstream end portion located on an upstream side of an area, in which the first fins are formed, in the flow direction or a downstream end portion located on a downstream side of the area in the flow direction. Fin pitches between the first fins are all identical with each other. At least one of fin pitches between the second fins is different from other fin pitches between the second fins.

First claim

What is claimed is:

1 . A heat exchanger comprising:
a tube in which a heat medium that exchanges heat with a heat exchange target flows, the tube having a flat shape in cross section perpendicular to a flow direction of the heat medium; and an inner fin that has a plate shape, the inner fin that is disposed in the tube and increases a heat transfer area in which heat transfers to and from the heat medium, wherein the inner fin has
a plurality of first fins that divide a main passage, in which the heat medium flows, into a plurality of narrow passages and
a plurality of second fins that are formed parallel to the flow direction in at least one of an upstream end portion located on an upstream side of an area, in which the plurality of first fins are provided, in the flow direction and a downstream end portion located on a downstream side of the area in the flow direction,
fin pitches between the plurality of first fins are all identical with each other, and at least one fin pitch of fin pitches between the plurality of second fins is different from other fin pitches between the plurality of second fins.

2 . The heat exchanger according to claim 1 , wherein
the plurality of first fins have a corrugated shape, the plurality of second fins have a linear shape, and the plurality of second fins are continuously connected to the plurality of first fins respectively, when viewed in a normal direction of the inner fin.

3 . The heat exchanger according to claim 2 , wherein
one of the plurality of first fins and a corresponding one of the plurality of second fins are connected to each other at a connection point in a portion in which the one fin pitch of the fin pitches between the plurality of second fins is larger than other fin pitches between the plurality of second fins, and the connection point is located in a portion in which a width of the one fin pitch of the first fins in an amplitude direction of the corrugated shape is smaller than a largest width.

4 . The heat exchanger according to claim 1 , wherein
the fin pitches between the plurality of the second fins includes fin pitches that are located at both ends in a direction perpendicular to the flow direction of the heat medium and that are larger than other fin pitches in an intermediate portion between the both ends in the direction perpendicular to the flow direction.

5 . The heat exchanger according to claim 1 , wherein
the plurality of second fins are arranged outside a cooling area, when the cooling area is defined as an area in which the tube and the heat exchange target overlap with each other when viewed in a normal direction of the inner fin.

Assignees

• Denso Corp

Inventors

• Suzuki Yuki
• Shimazu Tomohiro
• Mizuno Yasuhiro

Classifications

• H10W40/226

  characterised by projecting parts, e.g. fins to increase surface area (leadframes for cooling H10W70/461) · CPC title

• H10W40/47 Primary

  by flowing liquids, e.g. forced water cooling · CPC title

• H05K7/20927

  Liquid coolant without phase change · CPC title

• H05K7/20254

  Cold plates transferring heat from heat source to coolant · CPC title

• H05K7/20263 Primary

  Heat dissipaters releasing heat from coolant · CPC title