Flow path structure of heat exchanger, and heat exchanger

Patent metadata

Field	Value
Publication number	US-11644252-B2
Application number	US-202016815449-A
Country	US
Kind code	B2
Filing date	Mar 11, 2020
Priority date	Mar 28, 2019
Publication date	May 9, 2023
Grant date	May 9, 2023

Abstract

A heat exchanger 100 includes: an inner cylinder 10 through which a first fluid can flow, the inner cylinder 10 being configured to be capable of housing a heat recovery member 40 ; an outer cylinder 20 disposed so as to be spaced on a radially outer side of the inner cylinder 10 such that a second fluid can flow between the outer cylinder 20 and the inner cylinder 10 ; and an intermediate cylinder 30 disposed between the inner cylinder 10 and the outer cylinder 20 , the intermediate cylinder 30 partitioning a flow path for the second fluid into an inner flow path 31 b and an outer flow path 31 a . In the heat exchanger, the intermediate cylinder 30 includes communication holes 32 that are communicated in a radial direction, and the communication holes 32 are provided in an axial direction of the intermediate cylinder 30.

First claim

What is claimed is:

1. A flow path structure of a heat exchanger comprising:
an inner cylinder through which a first fluid can flow, the inner cylinder being configured to be capable of housing a heat recovery member;
an outer cylinder disposed so as to be spaced on a radially outer side of the inner cylinder such that a second fluid can flow between the outer cylinder and the inner cylinder; and
an intermediate cylinder disposed between the inner cylinder and the outer cylinder, the intermediate cylinder partitioning a flow path for the second fluid into an inner flow path and an outer flow path,
wherein the intermediate cylinder comprises communication holes that are communicated in a radial direction, the communication holes being provided in an axial direction of the intermediate cylinder, and
wherein the inner cylinder has:
a portion A where a radially outer side faces the inner flow path; and
a portion B where a radially outer side faces the outer flow path, and
wherein a thickness of the inner cylinder at the portion A is lower than that of the inner cylinder at the portion B.

2. The flow path structure of the heat exchanger according to claim 1 , wherein both ends of the intermediate cylinder in the axial direction are connected to the inner cylinder.

3. The flow path structure of the heat exchanger according to claim 1 , wherein the both ends of the intermediate cylinder in the axial direction are connected to the portion B of the inner cylinder.

4. The flow path structure of the heat exchanger according to claim 1 , wherein the communication holes are arranged in three or more rows in the axial direction of the intermediate cylinder.

5. The flow path structure of the heat exchanger according to claim 1 , wherein the communication holes are arranged in six rows or more in a circumferential direction of the intermediate cylinder.

6. The flow path structure of the heat exchanger according to claim 1 , wherein the communication holes are provided at a central portion in the axial direction of the intermediate cylinder.

7. The flow path structure of the heat exchanger according to claim 1 , wherein the communication holes are provided at substantially equal intervals in both the axial direction and the circumferential direction of the intermediate cylinder.

8. A heat exchanger, comprising the flow path structure of the heat exchanger according to claim 1 .

9. The heat exchanger according to claim 8 ,
wherein the heat exchanger further comprises the heat recovery member; and
wherein the heat recovery member is a honeycomb structure comprising partition walls, the partition walls defining a plurality of cells each extending from a first end face to a second end face.

10. The heat exchanger according to claim 9 , wherein the intermediate cylinder has a higher length in an axial direction than that of the honeycomb structure.

Assignees

• Ngk Insulators Ltd

Inventors

• Hamada Takafumi
• Kawaguchi Tatsuo
• Sakuma Takeshi
• Fumoto Yutaro

Classifications

• F28F2265/28

  for preventing noise · CPC title

• F28D21/0003

  the heat being recuperated from exhaust gases (F28D21/0014 takes precedence) · CPC title

• Y02E60/14

  Thermal energy storage · CPC title

• F28D20/0056 Primary

  using solid heat storage material (F28D20/0052 takes precedence) · CPC title

• F01N2240/02

  a heat exchanger · CPC title