Heat exchanger core

Patent metadata

Field	Value
Publication number	US-2023074924-A1
Application number	US-202117801144-A
Country	US
Kind code	A1
Filing date	Feb 24, 2021
Priority date	Feb 27, 2020
Publication date	Mar 9, 2023
Grant date	—

Abstract

A heat exchanger core includes: a first passage; and a second passage extending along the first passage. At least one of the first passage or the second passage includes a plurality of narrowed portions in which an area of a passage cross section orthogonal to a passage extension direction is minimum, and a plurality of enlarged portions in which the area is maximum. The plurality of narrowed portions and the plurality of enlarged portions are alternately disposed in the passage extension direction.

First claim

1 . A heat exchanger core, comprising
a first passage; and a second passage extending along the first passage, wherein at least one of the first passage or the second passage includes a plurality of narrowed portions in which an area of a passage cross section orthogonal to a passage extension direction is minimum, and a plurality of enlarged portions in which the area is maximum, and wherein the plurality of narrowed portions and the plurality of enlarged portions are alternately disposed in the passage extension direction.

2 . The heat exchanger core according to claim 1 , comprising:
a partition wall disposed between the first passage and the second passage to divide the first passage and the second passage, wherein the narrowed portions and the enlarged portions each have a shape that changes a passage width orthogonal to the partition wall in the passage extension direction.

3 . The heat exchanger core according to claim 2 , comprising:
obstacles disposed along the partition wall at a plurality of positions in the passage extension direction, respectively, in at least one of the first passage or the second passage, and wherein each of the obstacles is disposed between the partition wall and a passage wall opposite to the partition wall, and at least one set of the narrowed portions and the enlarged portions are formed on both sides of the obstacle.

4 . The heat exchanger core according to claim 2 ,
wherein the partition wall of at least one of the first passage or the second passage includes a recess and a projection as viewed in the passage extension direction.

5 . The heat exchanger core according to claim 1 ,
wherein at least one of the first passage or the second passage includes a rib for connecting opposed walls of the passage along a direction along a minimum passage width passing through a centroid of the passage cross section, and wherein the rib forms the narrowed portions and the enlarged portions.

6 . The heat exchanger core according to claim 5 ,
wherein the rib has an inclined surface whose angle with respect to the passage extension direction is not greater than 60 degrees.

7 . The heat exchanger core according to claim 5 ,
wherein the rib has a cross-sectional shape along an extension direction of the rib, where a length of the rib in the passage extension direction decreases as a distance from the opposed walls increases.

8 . The heat exchanger core according to claim 5 ,
wherein the rib includes a constricted portion located between the opposed walls and having a minimum length of the rib.

9 . The heat exchanger core according to claim 8 ,
wherein the rib has a cross section along the opposed walls in the constricted portion, the cross section being tapered toward an end of the rib.

10 . The heat exchanger core according to claim 8 ,
wherein the rib has rounded ends at least in the opposed walls.

11 . The heat exchanger core according to claim 5 ,
wherein the rib includes:
a pair of side walls connecting the opposed walls along the passage extension direction and a plane including an orthogonal direction of the opposed walls;
a pair of first tapered surfaces connected to the pair of side walls at ends of the rib in the passage extension direction, respectively, and defining a tapered shape of the rib; and
a pair of second tapered surfaces respectively connected to the pair of first tapered surfaces, and protruding from the first tapered surfaces in the passage extension direction and a direction orthogonal to the passage extension direction.

12 . The heat exchanger core according to claim 11 ,
wherein the first tapered surfaces and the second tapered surfaces are each formed by a flat surface.

13 . The heat exchanger core according to claim 11 ,
wherein, in a cross section of the rib along the opposed walls, a tip angle of the rib formed between the pair of second tapered surfaces is not greater than 120 degrees.

14 . The heat exchanger core according to claim 11 ,
wherein the first tapered surfaces extend along the plane including the orthogonal direction of the opposed walls.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Tanimoto Koichi
• Hara Nobuhide
• Nakaharai Hiroyuki
• Uefuji Yoichi
• Oda Takuo
• Eguchi Shunsaku
• Hatanaka Masaya

Classifications

• F28F13/12

  by creating turbulence, e.g. by stirring, by increasing the force of circulation (F28F13/08 takes precedence) · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• F28F2215/00

  Fins · CPC title

• F28F7/02 Primary

  Blocks traversed by passages for heat-exchange media {(F28D7/0008 takes precedence)} · CPC title

• F28D9/0037 Primary

  the conduits for the other heat-exchange medium also being formed by paired plates touching each other (F28D9/0043 takes precedence) · CPC title