US 11,754,348 B2
Microchannel flat tube and microchannel heat exchanger
Haobo Jiang, Coconut Creek, FL (US); Li-zhi Wang, Hangzhou (CN); Jian-long Jiang, Hangzhou (CN); and Lin-Jie Huang, East Amherst, NY (US)
Assigned to HANGZHOU SANHUA RESEARCH INSTITUTE CO., LTD., Hangzhou (CN)
Filed by HANGZHOU SANHUA RESEARCH INSTITUTE CO., LTD., Hangzhou (CN)
Filed on Mar. 20, 2022, as Appl. No. 17/699,157.
Application 17/699,157 is a continuation of application No. 17/042,110, filed on Sep. 26, 2020, granted, now 11,353,271.
Claims priority of application No. 201910366880.7 (CN), filed on May 5, 2019.
Prior Publication US 2022/0205736 A1, Jun. 30, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F28F 1/02 (2006.01); F28F 1/24 (2006.01); F28F 1/12 (2006.01)
CPC F28F 1/022 (2013.01) [F28F 1/128 (2013.01); F28F 1/24 (2013.01); F28F 2210/04 (2013.01); F28F 2215/02 (2013.01); F28F 2260/02 (2013.01)] 19 Claims
OG exemplary drawing
 
18. A microchannel heat exchanger, comprising:
a first collecting pipe comprising a first inner cavity;
a second collecting pipe comprising a second inner cavity; and
a plurality of microchannel flat tubes connecting between the first collecting pipe and the second collecting pipe, each flat tube defining a row of channels fluid communicating the first inner cavity and the second inner cavity;
each microchannel flat tube comprising a first plane, a second plane, a first side surface and a second side surface, the first plane and the second plane being disposed on opposite sides of the flat tube body along a thickness direction, respectively, the first side surface and the second side surface being disposed on opposite sides of the flat tube body along a width direction, respectively, each channel extending through the flat tube body along a length direction;
the row of channels comprising a first channel, a second channel and a third channel disposed in sequence along the width direction;
wherein heights of the first channel, the second channel and the third channel are same, and widths of the first channel, the second channel and the third channel are decreased at a fixed value.