Heat exchange core, heat exchanger, and method for manufacturing heat exchange core

Patent metadata

Field	Value
Publication number	US-2022290924-A1
Application number	US-202017637521-A
Country	US
Kind code	A1
Filing date	Feb 26, 2020
Priority date	Sep 4, 2019
Publication date	Sep 15, 2022
Grant date	—

Abstract

Provided is a technique to achieve equalization of stress in a heat exchange core. The heat exchange core which performs heat exchange between a first fluid and a second fluid includes a circular first cross-section in which a first flow path group for the first fluid and a second flow path group for the second fluid are positioned. First flow paths included in the first flow path group and second flow paths included in the second flow path group are annularly arranged in the first cross-section. The first flow path group and the second flow path group are concentrically arranged as a whole in the first cross-section. Each of the first flow paths and the second flow paths is divided into a plurality of sections in a circumferential direction of the heat exchange core.

First claim

1 . A heat exchange core which performs heat exchange between a first fluid and a second fluid, the heat exchange core comprising a circular first cross-section in which a first flow path group for the first fluid and a second flow path group for the second fluid are positioned, wherein
first flow paths included in the first flow path group and second flow paths included in the second flow path group are annularly arranged in the first cross-section, the first flow path group and the second flow path group are concentrically arranged as a whole in the first cross-section, each of the first flow paths and the second flow paths is divided into a plurality of sections in a circumferential direction of the heat exchange core, the sections of each of the first flow paths and the second flow paths are formed in a spiral shape around an axis of the heat exchange core, the sections of one of the first flow paths and the second flow paths extend in a clockwise direction as viewed from one end side in an axial direction of the heat exchange core, and the sections of another of the first flow paths and the second flow paths extend in a counterclockwise direction as viewed from the one end side in the axial direction.

2 . The heat exchange core according to claim 1 , further comprising a second cross-section in which a traverse path traversing the first flow path group and the second flow path group is positioned, wherein
the traverse path communicates with one of the first flow path group and the second flow path group, is separated from another of the first flow path group and the second flow path group, and extends along a radial direction of the heat exchange core in the second cross-section.

3 . The heat exchange core according to claim 2 , wherein the traverse path comprises two or more traverse paths distributed in the circumferential direction of the heat exchange core.

4 . The heat exchange core according to claim 3 , wherein each of the two or more traverse paths has an equal flow path cross-sectional area.

5 . The heat exchange core according to claim 2 , further comprising a third cross-section positioned on outside of the second cross-section in an axial direction orthogonal to a cross-section of the heat exchange core, wherein
out of the first flow path group and the second flow path group, one flow path group communicating with outside of the heat exchange core by the traverse path is closed in the third cross-section.

6 . The heat exchange core according to claim 1 , wherein a flow direction of the first fluid flowing in the spiral shape through the first flow path group around the axis of the heat exchange core is opposite to a flow direction of the second fluid flowing in the spiral shape through the second flow path group around the axis of the heat exchange core.

7 . The heat exchange core according to claim 1 , wherein a partition wall partitioning the first flow path group and the second flow path group includes a protrusion rising toward at least one of the first flow path and the second flow path.

8 . The heat exchange core according to claim 1 , wherein the plurality of sections each have an equal flow path diameter over the whole of the first flow path group and the second flow path group.

9 . The heat exchange core according to claim 1 , wherein positions of dividing walls dividing the sections in the circumferential direction of the heat exchange core are different, in the circumferential direction, between the adjacent first and second flow paths in a radial direction of the heat exchange core.

10 . (canceled)

11 . (canceled)

12 . A heat exchanger, comprising:
the heat exchange core according to claim 1 ; and a casing having a circular cross-section and housing the heat exchange core.

13 . A heat exchanger, comprising:
the heat exchange core according to claim 2 ; and a casing having a circular cross-section and housing the heat exchange core, wherein a communication space communicating the traverse path with outside of the heat exchange core is provided around the heat exchange core inside the casing.

14 . A method of manufacturing the heat exchange core according to claim 1 ,
comprising forming the first flow path group and the second flow path group by additive manufacturing using a metal material.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Eguchi Shunsaku
• Omura Minemasa
• Oda Takuo

Classifications

• F28F7/02

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

• F28F9/0278

  in the form of stacked distribution plates or perforated plates arranged over end plates · CPC title

• F28D7/106 Primary

  consisting of two coaxial conduits or modules of two coaxial conduits · CPC title

• F28D7/10 Primary

  the conduits being arranged one within the other, e.g. concentrically {(multiple wall tubes for leak detection F28F1/003)} · CPC title

• F28D1/02

  with heat-exchange conduits immersed in the body of fluid · CPC title