Heat exchanging member, heat exchanger and heat exchanger with purifier

Patent metadata

Field	Value
Publication number	US-11591950-B2
Application number	US-201916418227-A
Country	US
Kind code	B2
Filing date	May 21, 2019
Priority date	Jan 5, 2018
Publication date	Feb 28, 2023
Grant date	Feb 28, 2023

Abstract

A heat exchanging member including a hollow pillar shaped honeycomb structure having partition walls defining cells, the cells penetrating from a first end face to a second end face to form flow paths for a first fluid, an inner peripheral wall, and an outer peripheral wall; and a covering member being configured to cover the outer peripheral wall of the pillar shaped honeycomb structure. The heat exchanging member is configured to perform heat exchange between the first fluid and a second fluid flowing through an outer side of the covering member. In the heat exchanging member, in a cross section of the pillar shaped honeycomb structure perpendicular to a flow path direction of the first fluid, the cells are radially provided, and each of the inner peripheral wall and the outer peripheral wall has a thickness larger than that of each of the partition walls.

First claim

What is claimed:

1. A heat exchanger comprising:
a heat exchanging member including a hollow pillar shaped honeycomb structure having
partition walls defining cells, the cells penetrating from a first end face to a second end face to form flow paths for a first fluid,
an inner peripheral wall, and
an outer peripheral wall having an inner peripheral surface and an outer peripheral surface, at least a portion of the cells contacting the inner peripheral surface of the outer peripheral wall;

a covering member having an inner surface contacting and covering the outer peripheral surface of the outer peripheral wall of the pillar shaped honeycomb structure;
an inner cylinder provided in a hollow region of the hollow pillar shaped honeycomb structure, the inner cylinder having through holes for introducing the first fluid into the cells of the hollow honeycomb structure;
a frame configured to form a flow path for the second fluid, the flow path being defined between the frame and the covering member; and
an on-off valve being configured to interrupt a flow of the first fluid on an inner side of the inner cylinder during heat exchange between the first fluid and the second fluid,
wherein the inner cylinder comprises
a small diameter portion,
a large diameter portion, and
a step portion for continuously forming the small diameter portion and
the large diameter portion in an axial direction,

wherein the small diameter portion has an outer diameter that is smaller than a diameter of the hollow region of the hollow pillar shaped honeycomb structure,
wherein the large diameter portion has an outer diameter that is larger than the diameter of the hollow region of the hollow pillar shaped honeycomb structure,
wherein the step portion is engaged with one end face of the hollow pillar shaped honeycomb structure to fix the inner cylinder,
wherein the heat exchanging member is configured to perform heat exchange between the first fluid and a second fluid flowing past the outer surface of the covering member,
wherein in a cross section of the pillar shaped honeycomb structure perpendicular to a flow path direction of the first fluid, the cells are radially provided,
wherein in the cross section of the pillar shaped honeycomb structure perpendicular to the flow path direction of the first fluid, the partition walls comprise
second partition walls extending in a circumferential direction, and
first partition walls crossing with the second partition walls,

wherein a length of all of the first partition walls defining one cell is longer than that of the second partition walls defining the one cell,
wherein the first and second partition walls each have a thickness in a range of 0.1 to 0.6 mm,
wherein each of the inner peripheral wall and the outer peripheral wall has a thickness larger than that of each of the partition walls, and
wherein the inner peripheral wall and the outer peripheral wall each have a thickness in a range of 1 to 10 mm.

2. The heat exchanger according to claim 1 , wherein the first partition walls extend in the radial direction.

3. The heat exchanger according to claim 1 , wherein each of the first partition walls has a thickness higher than that of each of the second partition walls.

4. The heat exchanger according to claim 1 , wherein in the cross section of the pillar shaped honeycomb structure perpendicular to the flow path direction of the first fluid, a number of the first partition walls on the inner peripheral wall side is less than that of the first partition walls on the outer peripheral wall side.

5. The heat exchanger according to claim 1 , wherein the on-off valve is configured to interrupt the flow of the first fluid on the cell side of the hollow honeycomb structure during non-heat exchange.

6. The heat exchanger according to claim 1 , wherein the on-off valve comprises:
a first on-off valve being configured to interrupt the flow of the first fluid on the inner cylinder side during heat exchange; and
a second on-off valve being configured to interrupt the flow of the first fluid on the cell side of the hollow honeycomb structure during non-heat exchange.

7. The heat exchanger according to claim 6 , wherein the heat exchanger further comprises a blocking wall which blocks a part of the flow of the first fluid on the cell side of the hollow honeycomb structure, and wherein the heat exchanger is configured such that the blocking wall and the second on-off valve integrally interrupt the flow of the first fluid during non-heat exchange.

8. The heat exchanger according to claim 1 , wherein the frame and/or the covering member forming the flow path for the second fluid comprise at least one turbulent flow generating portion.

9. A heat exchanger with at least one purifier, comprising:
the heat exchanger according to claim 1 ; and
at least one purifier provided in the flow path for the first fluid on an upstream side and/or a downstream side of the heat exchanger,
wherein the at least one purifier and the heat exchanger are integrated by the frame of the heat exchanger.

10. A heat exchanger with at least one purifier, comprising:
two or more heat exchangers; and
at least one purifier provided in the flow path for the first fluid between the heat exchangers,
wherein the at least one purifier and the heat exchangers are integrated by the frame of the heat exchanger, and
wherein at least one of the two or more heat exchangers is the heat exchanger according to claim 1 .

11. The heat exchanger according to claim 1 , wherein the heat exchanging member comprises at least one of the following characteristics:
(a) the inner peripheral wall and the outer peripheral wall have a thickness of more than 0.3 mm and 10 mm or less;
(b) the partition walls, the inner peripheral wall and the outer peripheral wall contain 50% by mass or more of SiC;
(c) the pillar shaped honeycomb structure has an isostatic strength of more than 100 MPa; and
(d) the pillar shaped honeycomb structure has a thermal conductivity of 50 W/(m·K) or more at 25° C.

Assignees

• Ngk Insulators Ltd

Inventors

• Kawaguchi Tatsuo
• Sakuma Takeshi
• Kimura Daisuke
• Fumoto Yutaro

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F28F1/40

  the means being only inside the tubular element · CPC title

• F01M5/021

  by heating · CPC title

• F28F21/04

  of ceramic; of concrete; of natural stone · CPC title

• F01N3/28

  Construction of catalytic reactors · CPC title