Heat exchanger

Patent metadata

Field	Value
Publication number	US-11054186-B2
Application number	US-201716082497-A
Country	US
Kind code	B2
Filing date	Mar 24, 2017
Priority date	Apr 15, 2016
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

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

The invention claimed is:

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 being inside the cylindrical parts,
the plurality of fins including a second fin protruding from a respective 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,
wherein there is a gap through which a liquid flows between the interior of the cylindrical parts and the second fin.

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

3. 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 another one of the plurality of protruding portions.

4. 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.

5. 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.

6. 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 surface of each of the plurality of fins.

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

Assignees

• Mitsubishi Electric Corp

Inventors

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

Classifications

• F28F19/06

  of metal · CPC title

• F28D1/04 Primary

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

• F28F1/28

  the element being built-up from finned sections · 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