US 12,326,302 B2
Heat exchanger and air conditioner
Guanjun Wang, Shaoxing (CN); Zhaozhong Lan, Shaoxing (CN); and Ergang Ding, Shaoxing (CN)
Assigned to ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO., LTD., Shaoxing (CN)
Filed by ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO., LTD., Shaoxing (CN)
Filed on Aug. 7, 2023, as Appl. No. 18/230,777.
Application 18/230,777 is a continuation of application No. PCT/CN2022/072505, filed on Jan. 18, 2022.
Claims priority of application No. 202120349551.4 (CN), filed on Feb. 7, 2021.
Prior Publication US 2023/0375274 A1, Nov. 23, 2023
Int. Cl. F28D 7/16 (2006.01)
CPC F28D 7/1653 (2013.01) 10 Claims
OG exemplary drawing
 
1. A heat exchanger, comprising a plurality of fins and a plurality of flat pipes arranged in parallel,
wherein each of the plurality of flat pipes comprises a first finned region, a second finned region, and a finless region, the first finned region is connected to the second finned region via the finless region,
the plurality of fins are provided both between adjacent two first finned regions and between adjacent two second finned regions, an end of the finless region connected to the first finned region is twisted and defined as a first torsion section, the other end of the finless region connected to the second finned region is twisted and defined as a second torsion section, and a portion of the finless region between the first torsion section and the second torsion section is defined as a connecting section,
both the first torsion section and the second torsion section are twisted at a second angle along the same direction, so that each connecting section of the plurality of flat pipes is sequentially and partially stacked on an adjacent connecting section along the same direction, and the second angle is defined as b, the second angle b satisfies a following formula:

OG Complex Work Unit Math
 wherein a thickness of each of the plurality of flat pipes is defined as h, a distance between adjacent two of the plurality of flat pipes is defined as d, and the distance d between adjacent two of the plurality of flat pipes is greater than the thickness h of each of the plurality of flat pipes.