Heat exchanger

Patent metadata

Field	Value
Publication number	US-2021285733-A1
Application number	US-202117330362-A
Country	US
Kind code	A1
Filing date	May 25, 2021
Priority date	Sep 30, 2018
Publication date	Sep 16, 2021
Grant date	—

Abstract

A heat exchanger includes a collecting pipe, a number of heat exchange tubes and a distribution pipe. A pipe wall of the distribution pipe defines a number of through holes communicating with the collecting pipe. The through holes are a first through hole, . . . an (n−1)th through hole and an nth through hole disposed in sequence along a direction from a first end to a second end of the distribution pipe. A distance between an (i+1)th through hole and an ith through hole is: di=αiL0, i=1,2, . . . n−1, α=0.618, L0 is a distance between adjacent heat exchange tubes. As a result, uniformity of refrigerant distribution in the heat exchanger is improved.

First claim

What is claimed is:

1 . A heat exchanger, comprising:
a collecting pipe having a first end, a second end, a pipe wall and an inner cavity; a plurality of heat exchange tubes arranged along a length direction of the collecting pipe, each of the heat exchange tubes having a first end and an inner channel, the inner channel of the heat exchange tube being in communication with the inner cavity of the collecting pipe; a distribution pipe having a first end, a second end, a pipe wall and an inner space, the first end of the distribution pipe being a fluid inlet, the second end of the distribution pipe being closed, the pipe wall of the distribution pipe defining a plurality of through holes which are in communication with the inner cavity of the collecting pipe and the inner space of the distribution pipe, the plurality of through holes being disposed along a length direction of the distribution pipe, and the plurality of through holes comprising a first through hole, a second through hole, a third through hole, . . . an (n−1) th through hole and an n th through hole in sequence along a direction from the first end of the distribution pipe to the second end of the distribution pipe, wherein a distance between an (i+ 1 ) th through hole and an i th through hole is: d i =α i L 0 , i=1, 2, . . . n−1, α=0618, L 0 is a distance between adjacent heat exchange tubes.

2 . The heat exchanger according to claim 1 , wherein the plurality of heat exchange tubes comprise a first heat exchange tube, a second heat exchange tube, a third heat exchange tube and a fourth heat exchange tube in sequence along the direction from the first end of the distribution pipe to the second end of the distribution pipe;
wherein the first through hole is located between the third heat exchange tube and the fourth heat exchange tube.

3 . The heat exchanger according to claim 1 , wherein the first end of the heat exchange tube extends through the pipe wall of the collecting pipe and is inserted into the inner cavity of the collecting pipe.

4 . The heat exchanger according to claim 1 , wherein the second end of the distribution pipe extends from the first end of the collecting pipe into the inner cavity of the collecting pipe.

5 . A heat exchanger, comprising:
a collecting pipe having a first end, a second end, a pipe wall and an inner cavity; a plurality of heat exchange tubes disposed along a length direction of the collecting pipe, each of the heat exchange tubes having a first end and an inner channel, the inner channel of the heat exchange tube being in communication with the inner cavity of the collecting pipe; a distribution pipe having a first end, a second end, a pipe wall and an inner space, the first end of the distribution pipe being a fluid inlet, the second end of the distribution pipe being closed, the pipe wall of the distribution pipe defining a plurality of through holes which are in communication with the inner cavity of the collecting pipe and the inner space of the distribution pipe, one part of the through holes being located between the first end of the collecting pipe and a middle position of the collecting pipe in the length direction, the other part of the through holes being disposed along the length direction of the collecting pipe, distances between adjacent through holes being equal, the other part of the through holes being located between the middle position of the collecting pipe in the length direction and the second end of the collecting pipe, and the other part of the through holes comprising a first through hole, a second through hole, a third through hole, . . . , an (n−1) th through hole and an n th through hole in sequence in a direction from the middle position of the collecting pipe along the length direction toward the second end of the collecting pipe, wherein a distance between an (i+1) th through hole and an i th through hole is: d i =λα i L 0 , i=1, 2, . . . n−1, α=0618, L 0 is a distance between adjacent heat exchange tubes, and λ is a coefficient.

6 . The heat exchanger according to claim 5 , wherein in the part of the through holes, the distance between adjacent through holes is: d=λL 0 .

7 . The heat exchanger according to claim 6 , wherein λ is 2 to 10.

8 . The heat exchanger according to claim 7 , wherein λ is 2.5.

9 . The heat exchanger according to claim 5 , wherein the through hole is a round hole, and a diameter D 0 of the through hole is 1 mm<D 0 <3 mm.

10 . The heat exchanger according to claim 9 , wherein in the other part of the through holes, if d i <D 0 , then d i =D 0 +2 .

11 . The heat exchanger according to claim 5 , wherein the first end of the heat exchange tube extends through the pipe wall of the collecting pipe and is inserted into the inner cavity of the collecting pipe.

12 . The heat exchanger according to claim 5 , wherein the second end of the distribution pipe extends from the first end of the collecting pipe into the inner cavity of the collecting pipe.

13 . The heat exchanger according to claim 1 , wherein the through hole may be opened at any position of the distribution pipe along a circumferential direction of the distribution pipe.

14 . The heat exchanger according to claim 1 , further comprising a support assembly, the support assembly comprising:
a first support having a first end and a second end, the collecting pipe having an outer peripheral surface, the distribution pipe having an outer peripheral surface, the first end of the first support being connected to the outer peripheral surface of the collecting pipe, the second end of the first support passing through the pipe wall of the collecting pipe, the first cavity and the baffle in sequence from the outer peripheral surface of the collecting pipe to extend into the second cavity, the second end of the first support being in contact with the outer peripheral surface of the distribution pipe; and a second support extending from the second end of the collecting pipe into the inner cavity of the collecting pipe, and the second support being in contact with the outer peripheral surface of the distribution pipe.

15 . The heat exchanger according to claim 1 , wherein the pipe wall of the collecting pipe comprises an arc-shaped wall and a bottom wall, the arc-shaped wall has a first side edge and a second side edge, the bottom wall has a first side edge and a second side edge, the first side edge of the arc-shaped wall is connected to the first side edge of the bottom wall, and the second side edge of the arc-shaped wall is connected to the second side edge of the bottom wall.

16 . The heat exchanger according to claim 15 , wherein a cross section of the collecting pipe is substantially D-shaped, a cross section of the arc-shaped wall is semicircular, and a distance between the first end of the heat exchange tube and the bottom wall is 0 mm to 2 mm.

17 . The heat exchanger according to claim 1 , wherein the collecting pipe is a round pipe, the pipe wall of the collecting pipe defines a plurality of insertion holes which are disposed along the length direction of the collecting pipe; wherein the heat exchanger further comprises a baffle disposed in the inner cavity of the collecting pipe, the baffle extends along the length direction of the collecting pipe, the baffle divides the collecting pipe into a first cavity and a second cavity, the baffle defines a plurality of slots which are disposed along an extending direction of the baffle, the plurality of slots and the plurality of insertion holes are disposed in a one-to-one correspondence manner,

Assignees

• Hangzhou Sanhua Res Inst Co Ltd

Inventors

• Qi Zhaogang
• Huang Linjie
• Gao Qiang
• Jiang Jianlong
• Niu Yujiao
• Shao Chunyu

Classifications

• F28F9/0209

  having only transversal partitions · CPC title

• F28D2021/0068

  for refrigerant cycles · CPC title

• F28F9/02

  Header boxes; End plates · CPC title

• F28F3/02

  Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence) · CPC title

• F28F9/0273 Primary

  with multiple holes · CPC title