Heat exchanger and air conditioner having the same

Patent metadata

Field	Value
Publication number	US-11732971-B2
Application number	US-201816757208-A
Country	US
Kind code	B2
Filing date	Oct 10, 2018
Priority date	Oct 18, 2017
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A heat exchanger includes: flat pipes each including a passage for refrigerant that are arranged side by side in a predetermined step direction; and a header collecting pipe extending along the predetermined step direction that is connected to the flat pipes. The header collecting pipe includes: a flat pipe-side header forming member; and an opposite-side header forming member facing the flat pipe-side header forming member. The flat pipes are inserted in the flat pipe-side header forming member and an internal space exists between the flat pipe-side header forming member and the opposite-side header forming member. When viewed along the predetermined step direction: the flat pipe-side header forming member has a flat pipe-side curved portion protruding toward the flat pipes and the opposite-side header forming member has an opposite-side curved portion protruding toward a side away from the flat pipes.

First claim

The invention claimed is:

1. A heat exchanger comprising:
flat pipes arranged side by side in a predetermined step direction, each of the flat pipes comprising a passage for refrigerant; and
a header collecting pipe connected to the flat pipes and that extends along the predetermined step direction, wherein
the header collecting pipe includes:
a flat pipe-side header forming member into which the flat pipes are inserted; and
an opposite-side header forming member that faces the flat pipe-side header forming member, wherein
an internal space exists between the flat pipe-side header forming member and the opposite-side header forming member,

when viewed along the predetermined step direction:
the flat pipe-side header forming member has a flat pipe-side curved portion protruding toward the flat pipes, and
the opposite-side header forming member has an opposite-side curved portion protruding toward a side away from the flat pipes,

an inner diameter of the opposite-side curved portion is smaller than an inner diameter of the flat pipe-side curved portion,
the header collecting pipe further includes an intermediate-side header forming member interposed between the flat pipe-side header forming member and the opposite-side header forming member, and
the opposite-side header forming member further includes an opposite-side straight portion that:
extends straight from an end of the opposite-side curved portion when viewed along the predetermined step direction,
is joined to the intermediate-side header forming member, and
is not in contact with the internal space.

2. The heat exchanger according to claim 1 , wherein
the inner diameter of the flat pipe-side curved portion is larger than a width of each of the flat pipes, and
the inner diameter of the opposite-side curved portion is smaller than the width of each of the flat pipes.

3. The heat exchanger according to claim 1 , wherein
the intermediate-side header forming member partitions the internal space into a flat pipe-side space and an opposite-side space,
the flat pipe-side space is on a side between the intermediate-side header forming member and the flat pipe-side header forming member,
the opposite-side space is on a side between the intermediate-side header forming member and the opposite-side header forming member,
and
the header collecting pipe has a loop structure in which the refrigerant flows back and forth between the flat pipe-side space and the opposite-side space.

4. The heat exchanger according to claim 3 , wherein the inner diameter of the opposite-side curved portion is 0.5 to 0.75 times the inner diameter of the flat pipe-side curved portion.

5. The heat exchanger according to claim 1 , wherein
when viewed along the predetermined step direction, the intermediate-side header forming member includes an intermediate-side straight portion extending straight along the opposite-side straight portion, and
a length of the intermediate-side straight portion is equal to or greater than a length of the opposite-side straight portion.

6. The heat exchanger according to claim 1 , wherein the opposite-side header forming member is thinner than the flat pipe-side header forming member.

7. An air conditioner comprising the heat exchanger according to claim 1 .

8. The heat exchanger according to claim 1 , wherein the predetermined step direction is an up-down direction of the heat exchanger.

Assignees

• Daikin Ind Ltd

Inventors

• Yamada Kouju
• Satou Ken
• Jindou Masanori
• Oritani Yoshio

Classifications

• F28D7/1653 Primary

  the conduit assemblies having a square or rectangular shape · CPC title

• F28F9/0224

  Header boxes formed by sealing end plates into covers (F28F9/0221 takes precedence) · CPC title

• F28F2225/08

  for header boxes · CPC title

• F28F9/028 Primary

  by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels · CPC title

• F25B39/00

  Evaporators; Condensers · CPC title