Heat exchanger and air conditioner having the same

Patent metadata

Field	Value
Publication number	US-2021123684-A1
Application number	US-201816757208-A
Country	US
Kind code	A1
Filing date	Oct 10, 2018
Priority date	Oct 18, 2017
Publication date	Apr 29, 2021
Grant date	—

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

1 - 12 . (canceled)

13 . 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, and
an inner diameter of the opposite-side curved portion is smaller than an inner diameter of the flat pipe-side curved portion.

14 . The heat exchanger according to claim 13 , 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.

15 . The heat exchanger according to claim 13 , wherein
when viewed along the predetermined step direction, the opposite-side header forming member further includes an opposite-side straight portion extending straight from an end of the opposite-side curved portion, and the opposite-side straight portion is joined to the flat pipe-side header forming member.

16 . The heat exchanger according to claim 15 , wherein the opposite-side straight portion does not face the internal space.

17 . The heat exchanger according to claim 13 , wherein 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.

18 . The heat exchanger according to claim 17 , 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.

19 . The heat exchanger according to claim 18 , 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.

20 . The heat exchanger according to claim 17 , wherein
when viewed along the predetermined step direction, the opposite-side header forming member further includes an opposite-side straight portion extending straight from an end of the opposite-side curved portion, and the opposite-side straight portion is joined with the intermediate-side header forming member.

21 . The heat exchanger according to claim 20 , wherein the opposite-side straight portion faces away from the internal space.

22 . The heat exchanger according to claim 21 , 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.

23 . The heat exchanger according to claim 13 , wherein the opposite-side header forming member is thinner than the flat pipe-side header forming member.

24 . An air conditioner comprising the heat exchanger according to claim 13 .

25 . The heat exchanger according to claim 13 , 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

• F28F9/02

  Header boxes; End plates · CPC title

• F28F2225/08

  for header boxes · CPC title

• F28F9/0224

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

• F28F2215/12

  with U-shaped slots for laterally inserting conduits · 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