US-12624899-B2 - Heat exchanger core, heat exchanger, maintenance method for heat exchanger core, and producing method for heat exchanger core

US12624899B2US 12624899 B2US12624899 B2US 12624899B2US-12624899-B2

Abstract

A heat exchanger core according to at least one embodiment is provided with: a core body having a plurality of cavity portions forming a plurality of channels inside the core body; and a header including a header passage communicating with the plurality of channels on at least one end side of the core body. The header passage is at least partially located in a region displaced outward from an arrangement area of the plurality of channels in plan view as viewed from a first extension direction of the plurality of channels. The core body has a body side surface extending along the first extension direction at a position closer to the arrangement area than a portion of the header passage that is farthest outward from the arrangement area in the plan view.

Inventors

Hiroyuki NAKAHARAI
Koichi Tanimoto
Yoichi Uefuji
Nobuhide Hara
Takuo ODA
Masaya Hatanaka
Shunsaku Eguchi

Assignees

MITSUBISHI HEAVY INDUSTRIES, LTD.

Dates

Publication Date: 20260512
Application Date: 20210224
Priority Date: 20200227

Claims (12)

1 . A heat exchanger core, comprising: a core body having a plurality of cavity portions forming a plurality of channels inside the core body; and a header including a header passage communicating with the plurality of channels on at least one end side of the core body, wherein the header passage is at least partially located in a region displaced outward from an arrangement area of the plurality of channels in plan view as viewed from a first extension direction of the plurality of channels, wherein the core body has a body side surface extending along the first extension direction at a position closer to the arrangement area than a portion of the header passage that is farthest outward from the arrangement area in the plan view, wherein the header passage includes a common passage extending in a second extension direction intersecting the first extension direction inside the header, and a plurality of branch passages connecting the common passage to the plurality of channels, wherein the header includes a header lid portion disposed at an end portion of the heat exchanger core along the first extension direction to cover the header passage, wherein the header lid portion includes a first region covering the common passage and a second region covering the plurality of branch passages, wherein at least part of the second region is recessed toward the core body along the first extension direction with respect to the first region, and wherein the header includes a first header including a header passage that communicates with the plurality of channels on one end side of the core body, and a second header including a header passage that communicates with the plurality of channels on another end side of the core body, wherein the heat exchanger core further comprises: a first connection region connecting an outer surface of the first header to the body side surface; and a second connection region connecting an outer surface of the second header to the body side surface, wherein an inclination angle of an extension direction of the first connection region with respect to the first extension direction is 25 degrees or more and 60 degrees or less, and wherein an inclination angle of an extension direction of the second connection region with respect to the first extension direction is 85 degrees or more and 95 degrees or less.
2 . The heat exchanger core according to claim 1 , wherein, in the plan view, the body side surface extends along the second extension direction to at least one of one end or another end of the common passage inside the header.
3 . The heat exchanger core according to claim 1 , wherein a portion of an outer surface of the heat exchanger core in at least part of the first region and a region between the first region and the body side surface has a curved surface protruding toward an outer side of the heat exchanger core.
4 . The heat exchanger core according to claim 1 , further comprising: a connection region connecting an outer surface of the header to the body side surface, wherein an inclination angle of an extension direction of the connection region with respect to the first extension direction is 25 degrees or more and 60 degrees or less.
5 . A heat exchanger, comprising: at least one heat exchanger core according to claim 1 ; and a housing to which the at least one heat exchanger core is attached.
6 . A heat exchanger core comprising: a core body having a plurality of cavity portions forming a plurality of channels inside the core body; and a header including a header passage communicating with the plurality of channels on at least one end side of the core body, wherein the header passage is at least partially located in a region displaced outward from an arrangement area of the plurality of channels in plan view as viewed from a first extension direction of the plurality of channels, wherein the core body has a body side surface extending along the first extension direction at a position closer to the arrangement area than a portion of the header passage that is farthest outward from the arrangement area in the plan view, wherein the header passage includes a common passage extending in a second extension direction intersecting the first extension direction inside the header, and a plurality of branch passages connecting the common passage to the plurality of channels, wherein the header includes a header lid portion disposed at an end portion of the heat exchanger core along the first extension direction to cover the header passage, wherein the header lid portion includes a first region covering the common passage and a second region covering the plurality of branch passages, wherein at least part of the second region is recessed toward the core body along the first extension direction with respect to the first region, wherein the header includes a projecting tube having a passage that communicates with the common passage and projecting from the header along the second extension direction, wherein the heat exchanger core further comprises a support portion connecting a side portion of the projecting tube to the core body to support the side portion along the first extension direction from the core body, and wherein the support portion is formed so as to have an inclined surface such that a distance from the side portion along the first extension direction increases from a distal end side to a proximal end side of the projecting tube.
7 . The heat exchanger core according to claim 6 , wherein an inclination angle of an extension direction of the inclined surface with respect to the first extension direction is 25 degrees or more and 60 degrees or less.
8 . The heat exchanger core according to claim 6 , wherein the header includes a first header including a first header passage that communicates with the plurality of channels on one end side of the core body, and a second header including a second header passage that communicates with the plurality of channels on another end side of the core body, wherein the first header passage includes a first common passage extending in the second extension direction intersecting the first extension direction inside the first header, and a plurality of first branch passages connecting the first common passage to the plurality of channels, wherein the second header passage includes a second common passage extending in the second extension direction inside the second header, and a plurality of second branch passages connecting the second common passage to the plurality of channels, wherein the projecting tube includes: a first projecting tube having a passage that communicates with the first common passage and projecting from the first header along the second extension direction in the first header; and a second projecting tube having a passage that communicates with the second common passage and projecting from the second header along the second extension direction in the second header, and wherein the support portion is provided only on one of the first projecting tube or the second projecting tube.
9 . A heat exchanger, comprising: at least one heat exchanger core according to claim 6 ; and a housing to which the at least one heat exchanger core is attached, wherein the housing has a fitting recess into which the support portion is fitted when the at least one heat exchanger core is attached.
10 . The heat exchanger core according to claim 6 , wherein, in the plan view, the body side surface extends along the second extension direction to at least one of one end or another end of the common passage inside the header.
11 . The heat exchanger core according to claim 6 , further comprising: a connection region connecting an outer surface of the header to the body side surface, wherein an inclination angle of an extension direction of the connection region with respect to the first extension direction is 25 degrees or more and 60 degrees or less.
12 . A heat exchanger, comprising: at least one heat exchanger core according to claim 6 ; and a housing to which the at least one heat exchanger core is attached.

Description

TECHNICAL FIELD The present disclosure relates to a heat exchanger core, a heat exchanger, a maintenance method for a heat exchanger core, and a producing method for a heat exchanger core. The present application claims priority based on Japanese Patent Application No. 2020-031252 filed Feb. 27, 2020, the entire content of which is incorporated herein by reference. BACKGROUND ART Heat exchangers are used in various devices, plants, etc., for the purpose of heating or cooling fluids. There are various types of heat exchangers; for example, a heat exchanger in which a heat exchanger core composed of a laminate of plates is housed inside a cylindrical casing is known (Patent Document 1). CITATION LIST Patent Literature Patent Document 1: JP3406896B SUMMARY Problems to be Solved However, when a heat exchanger core is formed by stacking plates as in Patent Document 1, the shape of the heat exchanger core is inevitably restricted. In response to this, in recent years, a heat exchanger has been manufactured by additive manufacturing. By producing the heat exchanger by additive manufacturing, it is possible to significantly reduce the constraints on the shape of the heat exchanger core. However, if the overall shape of the heat exchanger core is a simple pillar shape, for example, there will be excess areas that do not contribute to the strength and heat exchange efficiency of the heat exchanger core, resulting in an increase in the weight of the heat exchanger core and the manufacturing cost. In view of the above, an object of at least one embodiment of the present disclosure is to provide a heat exchanger core that has a reasonable shape. Solution to the Problems (1) A heat exchanger core according to at least one embodiment of the present disclosure is provided with: a core body having a plurality of cavity portions forming a plurality of channels inside the core body; and a header including a header passage communicating with the plurality of channels on at least one end side of the core body. The header passage is at least partially located in a region displaced outward from an arrangement area of the plurality of channels in plan view as viewed from a first extension direction of the plurality of channels. The core body has a body side surface extending along the first extension direction at a position closer the arrangement area than a portion of the header passage that is farthest outward from the arrangement area in the plan view. (2) A heat exchanger according to at least one embodiment of the present disclosure is provided with: at least one heat exchanger core having the configuration (1); and a housing to which the at least one heat exchanger core is attached. (3) A maintenance method for a heat exchanger according to at least one embodiment of the present disclosure is a maintenance method for a heat exchanger provided with: at least one heat exchanger core having the configuration (1) or (2); and a housing to which the at least one heat exchanger core is attached, including: a step of holding the heat exchanger core by a jig; a step of inserting the heat exchanger core held by the jig into a mounting portion for the heat exchanger core in the housing together with the jig; and a step of removing the jig from the mounting portion while the heat exchanger core inserted in the mounting portion is left in the mounting portion. The step of holding the heat exchanger core by the jig includes holding the heat exchanger core while supporting the body side surface from the side by the jig. (4) A producing method for a heat exchanger according to at least one embodiment of the present disclosure includes: a step of forming a core body having a plurality of cavity portions forming a plurality of channels inside the core body by additive manufacturing; and a step of forming a header including a header passage communicating with the plurality of channels on at least one end side of the core body by additive manufacturing. The step of forming the header includes forming the header passage such that the header passage is at least partially located in a region displaced outward from an arrangement area of the plurality of channels in plan view as viewed from a first extension direction of the plurality of channels. The step of forming the core body includes forming the core body such that the core body has a body side surface extending along the first extension direction at a position closer to the arrangement area than a portion of the header passage that is farthest outward from the arrangement area in the plan view. Advantageous Effects At least one embodiment of the present disclosure provides a heat exchanger core that has a reasonable shape. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic perspective view of a heat exchanger core according to some embodiments. FIG. 2 is an end view of a section cut along the dotted line L1 of FIG. 1. FIG. 3 is a cross-sectional view taken along line of FIG. 2. FIG. 4 is a