Heat exchanger

Patent metadata

Field	Value
Publication number	US-2019086153-A1
Application number	US-201716082497-A
Country	US
Kind code	A1
Filing date	Mar 24, 2017
Priority date	Apr 15, 2016
Publication date	Mar 21, 2019
Grant date	—

Abstract

Provided is a heat exchanger capable of ensuring both heat exchange performance and reliability against corrosion. The heat exchanger includes a plurality of fins each having a flat plate shape, openings provided in each of the plurality of fins, and cylindrical parts arranged on outer peripheries of the openings, each having an inner diameter larger than an outer diameter of each of the openings. The plurality of fins are stacked on one another with the cylindrical parts interposed between the plurality of fins. The openings and the cylindrical parts are configured to form a liquid passage pipe, and the openings protrude further inside than are the cylindrical parts.

First claim

1 . A heat exchanger, comprising:
a plurality of fins each having a flat plate shape; openings provided in each of the plurality of fins; and cylindrical parts arranged on outer peripheries of the openings, each having an inner diameter larger than an outer diameter of each of the openings, the plurality of fins being stacked on one another with the cylindrical parts interposed between the plurality of fins, the openings and the cylindrical parts being configured to form a liquid passage pipe, the openings protruding being inside the cylindrical parts, the plurality of fins including a second fin protruding from one of the openings to a direction in which the plurality of fins are stacked on one another, the second fin being a cylindrical shape, and the second fin including a plurality of protruding portions projecting toward an interior of the cylindrical shape.

2 - 3 . (canceled)

4 . A heat exchanger, comprising:
a plurality of fins each having a flat plate shape; openings provided in each of the plurality of fins; and cylindrical parts arranged on outer peripheries of the openings, each having an inner diameter larger than an outer diameter of each of the openings, the plurality of fins being stacked on one another with the cylindrical parts interposed between the plurality of fins, the openings and the cylindrical parts being configured to form a liquid passage pipe, the openings being inside the cylindrical parts, the plurality of fins including a plurality of second fins protruding from one of the openings to a direction in which the plurality of fins are stacked on one another, the plurality of second fins being arranged intermittently in a circumferential direction of each of the openings, and adjacent ones of the plurality of second fins being arranged to be bent in directions reverse to each other.

5 . (canceled)

6 . The heat exchanger of claim 1 , wherein the plurality of protruding portions each have a rectangular shape or a semispherical shape.

7 . The heat exchanger of claim 1 , wherein, in adjacent ones of the plurality of fins, one of the plurality of protruding portions is positioned to be shifted by a half pitch in a circumferential direction of the cylindrical shape to an other one of the plurality of protruding portions.

8 - 10 . (canceled)

11 . The heat exchanger of claim 1 , wherein each of the plurality of fins includes a projection formed on an outer periphery of each of the cylindrical parts to protrude in a direction perpendicular to one surface of a corresponding one of the plurality of fins.

12 . (canceled)

13 . The heat exchanger of claim 1 , wherein each of the plurality of fins includes a cutout portion and a cut-and-raised portion positioned on an outer periphery of each of the cylindrical parts.

14 . The heat exchanger of claim 1 , wherein a layer of a material having a higher ionization tendency than that of a material of the plurality of fins is provided on a front surface of each of the plurality of fins.

15 . The heat exchanger of claim 1 , wherein a front surface of each of the plurality of fins is covered by a resin coating layer.

16 . A heat exchanger, comprising:
a plurality of fins each having a flat plate shape; openings provided in each of the plurality of fins; and cylindrical parts arranged on outer peripheries of the openings, each having an inner diameter larger than an outer diameter of each of the openings, the plurality of fins being stacked on one another with the cylindrical parts interposed between the plurality of fins, the openings and the cylindrical parts being configured to form a liquid passage pipe, the openings being inside the cylindrical parts, the plurality of fins including a second fin protruding from one of the openings to a direction in which the plurality of fins are stacked on one another, a fluid flowing through the openings being caused to flow in and out between the second fin and one of the cylindrical parts surrounding a periphery of the second fin.

17 . The heat exchanger of claim 16 ,
wherein the second fin has a cylindrical shape, and wherein a height of the second fin in the direction in which the plurality of fins are stacked on one another is smaller than an interval of the plurality of fins.

18 . The heat exchanger of claim 16 , wherein a plurality of the second fins are arranged intermittently in a circumferential direction of each of the openings.

19 . The heat exchanger of claim 17 , wherein the second fin includes a plurality of protruding portions projecting toward an interior of the cylindrical shape.

20 . The heat exchanger of claim 19 , wherein the plurality of protruding portions each have a rectangular shape or a semispherical shape.

21 . The heat exchanger of claim 19 , wherein, in adjacent ones of the plurality of fins, one of the plurality of protruding portions is positioned to be shifted by a half pitch in a circumferential direction of the cylindrical shape to an other one of the plurality of protruding portions.

22 . The heat exchanger of claim 18 , wherein the plurality of the second fins are arranged to be bent in a same direction so that distal end portions of the plurality of the second fins extend along the liquid passage pipe.

23 . The heat exchanger of claim 18 , wherein adjacent ones of the plurality of the second fins are arranged to be bent in directions reverse to each other.

24 . The heat exchanger of claim 17 , wherein the cylindrical shape has a liquid passage hole provided in the cylindrical shape.

25 . The heat exchanger of claim 24 ,
wherein each of the plurality of fins includes a projection formed on an outer periphery of each of the cylindrical parts to protrude in a direction perpendicular to one surface of a corresponding one of the plurality of fins, and wherein the projection has an annular shape surrounding each of the openings.

Assignees

• Mitsubishi Electric Corp

Inventors

• Yoshimura Susumu
• Yoshida Yasuhiro
• Miya Kazuhiro
• Miyawaki Kosuke
• Yoneda Norihiro
• Hori Takahiro

Classifications

• F28F19/06

  of metal · CPC title

• F28F1/28

  the element being built-up from finned sections · CPC title

• F28D1/04 Primary

  with tubular conduits {(F28D1/0246 takes precedence)} · CPC title

• F28F19/04

  of rubber; of plastics material; of varnish · CPC title

• F28F1/32

  the means having portions engaging further tubular elements · CPC title