Heat exchanger

Patent metadata

Field	Value
Publication number	US-11268767-B2
Application number	US-201916964181-A
Country	US
Kind code	B2
Filing date	May 17, 2019
Priority date	May 17, 2018
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A heat exchanger includes a first collecting pipe, a second collecting pipe and a number of flat tubes connected between the first collecting pipe and the second collecting pipe. The first collecting pipe includes a first upper main board and a first lower main board. A first channel and a second channel are formed between the first upper main board and the first lower main board. The second collecting pipe includes a third channel and a fourth channel. The third channel is communicated with the first channel through a row of the flat tubes. The fourth channel is communicated with the second channel through another row of the flat tubes.

First claim

What is claimed is:

1. A heat exchanger comprising:
a first collecting pipe comprising a first upper main board and a first lower main board, the first upper main board and the first lower main board being hermetically connected, a first channel and a second channel being formed between the first upper main board and the first lower main board;
a second collecting pipe provided with a third channel and a fourth channel; and
a plurality of flat tubes in two rows, one ends of the flat tubes being communicated with the first channel and the second channel, respectively; and the other ends of the flat tubes being communicated with the third channel and the fourth channel, respectively; wherein
the third channel is communicated with the first channel through a row of the flat tubes, and the fourth channel is communicated with the second channel through another row of the flat tubes; wherein
the first upper main board has a flat bottom surface, the first lower main board has a flat top surface facing the flat bottom surface, the first channel and the second channel are formed between the flat bottom surface and the flat top surface; wherein
a vertical height between a highest point of the first channel and the second channel and a lowest point of the first channel and the second channel is L1, a maximum width of each of the first channel and the second channel is L2, and a ratio of L1 to L2 is not greater than 1:4; and wherein
the one ends of the flat tubes protrude into the first channel and the second channel, respectively.

2. The heat exchanger according to claim 1 , wherein the first lower main board comprises a pair of side walls bent toward the first upper main board and abutting against the flat bottom surface of the first upper main board, and the first lower main board comprises a first middle rib abutting against the flat bottom surface of the first upper main board; and
the first channel and the second channel are formed by the flat top surface of the first lower main board, the side walls, the first middle rib and the flat bottom surface of the first upper main board.

3. The heat exchanger according to claim 1 , wherein the first upper main board comprises two grooves each extending along a length direction of the first upper main board, a second middle rib is provided between the two grooves to separate the two grooves, and the first channel and the second channel are formed by the grooves of the first upper main board, the second middle rib and the first lower main board.

4. The heat exchanger according to claim 3 , wherein a first intermediate main board is provided between the first upper main board and the first lower main board, and the first intermediate main board is provided with two rows of first slots which are communicated with the first channel and the second channel, respectively.

5. The heat exchanger according to claim 4 , wherein the first lower main board is provided with two rows of first flat tube slots each of which is corresponding to one of the first slots, the first intermediate main board is sandwiched by the first upper main board and the first lower main board, and the one ends of the flat tubes are placed in the first slots and sealed through walls which respectively define the first flat tube slots; and wherein
the one ends of the flat tubes do not extend beyond the first intermediate main board.

6. The heat exchanger according to claim 1 , wherein a first intermediate main board is provided between and sandwiched by the first upper main board and the first lower main board, the first intermediate main board is provided with two first through slots arranged side by side, each first through slot extends along a length direction of the first upper main board, and the first channel and the second channel are formed by the flat bottom surface of the first upper main board, the two first through slots and the flat top surface of the first lower main board.

7. The heat exchanger according to claim 6 , wherein the first upper main board, the first intermediate main board and the first lower main board are all of flat plate shapes and are fixed together by welding.

8. A heat exchanger comprising:
a first collecting pipe comprising a first upper main board and a first lower main board, the first upper main board and the first lower main board being hermetically connected, a first channel and a second channel being formed between the first upper main board and the first lower main board;
a second collecting pipe provided with a third channel and a fourth channel; and
a plurality of flat tubes in two rows, one ends of the flat tubes being communicated with the first channel and the second channel, respectively; and the other ends of the flat tubes being communicated with the third channel and the fourth channel, respectively; wherein
the third channel is communicated with the first channel through a row of the flat tubes, and the fourth channel is communicated with the second channel through another row of the flat tubes; and wherein
the first upper main board is provided with two first partitions, and each of the first channel and the second channel is separated into two parts by the corresponding first partition.

9. The heat exchanger according to claim 1 , wherein one of the first channel and the second channel is provided with an inlet and the other is provided with an outlet; or
one of the third channel and the fourth channel is provided with an inlet, and the other is provided with an outlet.

10. A heat exchanger comprising:
a first collecting pipe comprising a first upper main board and a first lower main board, the first upper main board and the first lower main board being hermetically connected, a first channel and a second channel being formed between the first upper main board and the first lower main board;
a second collecting pipe provided with a third channel and a fourth channel; and
a plurality of flat tubes in two rows, one ends of the flat tubes being communicated with the first channel and the second channel, respectively; and the other ends of the flat tubes being communicated with the third channel and the fourth channel, respectively; wherein
the third channel is communicated with the first channel through a row of the flat tubes, and the fourth channel is communicated with the second channel through another row of the flat tubes; and wherein
the first collecting pipe or the second collecting pipe is provided with an inlet and an outlet, the first upper main board is provided with a third middle rib and a plurality of second partitions, the first upper main board encloses with the first lower main board through the third middle rib to form the first channel and the second channel, and the first channel and the second channel are communicated with the second collecting pipe through the flat tubes, respectively;
the second partitions separate each of the first channel and the second channel into two chambers;
the first upper main board is further provided with two first reinforcing ribs, the two first reinforcing ribs are both arranged along a length direction of the first upper main board to separate the first channel and the second channel along the length direction, respectively; the two first reinforcing ribs are located in the first channel and the second channel, respectively; and the two first reinforcing ribs are parallel to the third middle rib.

11. The heat exchanger according to claim 10 , wherein the first collecting pipe further comprises a second middle main board; the first upper main board encloses with the second intermediate main board through the third intermediate rib, and further encloses with the first lower main bo

Assignees

• Hangzhou Sanhua Res Inst Co Ltd

Inventors

• Dong Junqi
• Zhang Weiwei
• Gao Jianhua

Classifications

• F28D2021/0068

  for refrigerant cycles · CPC title

• F28D1/053 Primary

  the conduits being straight · CPC title

• F28F9/0207

  the longitudinal or transversal partitions being separate elements attached to header boxes (F28F9/0212, F28F9/0217 take precedence) · CPC title

• F28F9/0278

  in the form of stacked distribution plates or perforated plates arranged over end plates · CPC title

• F28F9/0253

  with multiple channels, e.g. with combined inflow and outflow channels · CPC title