US 11,991,862 B2
Heat sink with counter flow diverging microchannels
Chin Pan, Hong Kong (HK); Xingchi Jiang, Hong Kong (HK); and Shiwei Zhang, Guangzhou (CN)
Assigned to City University of Hong Kong, Hong Kong (HK)
Filed by City University of Hong Kong, Hong Kong (HK)
Filed on Sep. 14, 2021, as Appl. No. 17/474,074.
Claims priority of provisional application 63/077,849, filed on Sep. 14, 2020.
Prior Publication US 2022/0087053 A1, Mar. 17, 2022
Int. Cl. H05K 7/20 (2006.01); F28F 3/12 (2006.01)
CPC H05K 7/2039 (2013.01) [F28F 3/12 (2013.01); H05K 7/20327 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A microchannel heat sink, comprising:
a plurality of approximately parallel microchannels, each microchannel including a working fluid inlet including an opening for receiving the working fluid and a working fluid outlet including an opening for discharging the working fluid away from the heat sink positioned at approximately opposite ends of the heat sink,
each working fluid inlet of a first microchannel being positioned adjacent to a working fluid outlet of a second, adjacent microchannel such that the plurality of approximately parallel microchannels have alternating working fluid flows in opposite directions for each adjacent pair of microchannels,
each microchannel is thermally coupled to an adjacent microchannel for heat exchange between the adjacent microchannels;
each microchannel being dimensioned and configured such that the working fluid entering the microchannel experiences two-phase flow of the working fluid including at least one vapor phase and at least one liquid phase, and wherein each microchannel working fluid inlet is at an angle to its corresponding working fluid outlet.