Heat exchanger

Patent metadata

Field	Value
Publication number	US-11543186-B2
Application number	US-201917280657-A
Country	US
Kind code	B2
Filing date	Aug 30, 2019
Priority date	Sep 28, 2018
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

A heat exchanger includes: a header that extends in a first direction; and a plurality of heat transfer tubes that extend in a second direction crossing the first direction, each of which has one end connected to the header, and that are arranged in the first direction at intervals. The header includes: a header body having a tubular shape, a first member through which the one end of each of the heat transfer tubes extends, and a second member positioned between the header body and the first member in the second direction. The second member includes: a base portion that extends in the first direction, and a plurality of protruding portions that extend from the base portion toward the first member in the second direction.

First claim

The invention claimed is:

1. A heat exchanger comprising:
a header that extends in a first direction; and
a plurality of heat transfer tubes that extend in a second direction crossing the first direction, each of which has one end connected to the header, and that are arranged in the first direction at intervals,
wherein the header includes
a header body having a tubular shape,
a first member through which the one end of each of the heat transfer tubes extends, and
a second member positioned between the header body and the first member in the second direction,

wherein the second member includes
a base portion that extends in the first direction, and
a plurality of protruding portions that extend from the base portion toward the first member in the second direction,

wherein a first space is surrounded by the base portion and adjacent protruding portions,
wherein a length of the first space in a third direction, that crosses the first direction and the second direction, is greater than a length of each of the heat transfer tubes in the third direction,
wherein an oblong communication hole is formed in the base portion to allow the first space and an inner space of the header body to communicate with each other, where a longitudinal direction of the oblong communication hole extends in the third direction, and
wherein a part of an edge that forms the oblong communication hole on the heat transfer tube side is chamfered.

2. The heat exchanger according to claim 1 ,
wherein the protruding portions are joined to the first member.

3. The heat exchanger according to claim 1 ,
wherein a length of each of the protruding portions in the second direction is greater than or equal to 2 mm.

4. The heat exchanger according to claim 1 ,
wherein the plurality of protruding portions are arranged in the first direction at intervals greater than or equal to 1 mm.

5. The heat exchanger according to claim 1 ,
wherein the first member covers the first space.

6. The heat exchanger according to claim 1 ,
wherein an area of the oblong communication hole is greater than a cross-sectional area of a refrigerant flow path formed in the heat transfer tube.

7. The heat exchanger according to claim 1 ,
wherein the heat transfer tubes are flat tubes in each of which a plurality of refrigerant flow paths are formed.

8. The heat exchanger according to claim 1 ,
wherein a length of the base portion in the second direction is less than a length of each of the protruding portions in the first direction.

9. The heat exchanger according to claim 8 ,
wherein the length of each of the protruding portions in the first direction is greater than or equal to twice the length of the base portion in the second direction.

10. The heat exchanger according to claim 1 ,
wherein the length of the base portion in the second direction is less than or equal to 4 mm.

11. The heat exchanger according to claim 1 ,
wherein the second member is an extrusion.

12. The heat exchanger according to claim 1 ,
wherein the first direction is a vertical direction.

13. The heat exchanger according to claim 1 ,
wherein a brazing material that joins the header body and the base portion is disposed between the header body and the base portion.

14. The heat exchanger according to claim 1 ,
wherein the header further includes a penetration member that extends in the second direction and extends through the header body, the first member, and the second member.

15. The heat exchanger according to claim 1 ,
wherein a plurality of engagement holes are formed in one of the header body and the first member, and
wherein engagement portions that engage with the engagement holes are formed in the other of the header body and the first member.

16. The heat exchanger according to claim 1 ,
wherein the first member is a member that extends in the first direction, and
wherein the first member includes
a first portion that is positioned on the heat transfer tube side relative to the second member and into which the heat transfer tubes are inserted, and
a second portion that extends in the second direction from each of two ends of the first portion in a transversal direction and that engages with the header body.

17. The heat exchanger according to claim 16 ,
wherein the header body includes a concave portion on a side opposite to the second member in the second direction, and
wherein the second portion
has a length in the second direction that is greater than a length of the header body in the second direction,
includes a convex portion at a tip end thereof in the second direction, and
engages with the header body as the convex portion engages with the concave portion.

Assignees

• Daikin Ind Ltd

Inventors

• Hirokawa Tomoki
• Yoshioka Shun
• Andou Tooru
• Matsumoto Yoshiyuki
• Kusaka hideyuki
• Nakano Hiroyuki
• Oritani Yoshio

Classifications

• F28F2275/085

  with snap connection · CPC title

• F28F9/0263 Primary

  by varying the geometry or cross-section of header box · CPC title

• F28F9/0221

  Header boxes or end plates formed by stacked elements · CPC title

• F28F2215/12

  with U-shaped slots for laterally inserting conduits · CPC title

• F28D2021/0068

  for refrigerant cycles · CPC title