A multilayered microfluidic channel heat spreader and method of manufacturing the same

By designing a multi-layer jet microchannel radiator and using an array of annular open microstructures to form interlaced microchannels, the problems of reduced heat exchange efficiency and boiling instability in traditional microchannel radiators are solved, achieving efficient heat exchange and system stability.

CN117098375BActive Publication Date: 2026-06-12HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN) (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN) (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
Filing Date
2023-09-28
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Traditional microchannel radiators suffer from reduced heat transfer efficiency due to the thickening of the heat transfer boundary layer caused by fluid flow in a single-layer microchannel. Furthermore, the rapid generation of boiling bubbles leads to boiling instability issues, affecting the stable operation of the system.

Method used

A multi-layer jet microchannel heat sink is designed, comprising a multi-layer annular open microstructure array to form a crisscrossing microchannel structure. By combining the connecting microchannels and the vertical microchannels, the heat exchange efficiency is enhanced, and the boiling instability is suppressed by the disturbance of boiling bubbles by the coolant.

Benefits of technology

It improves heat exchange efficiency, suppresses boiling instability, and has the advantages of compact structure and small size. In addition, the manufacturing process is simple and the cost is low.

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Abstract

The present application relates to the technical field of micro-channel radiator, more particularly to a multi-layer jet micro-channel radiator and a manufacturing method thereof. The radiator comprises a bottom plate and at least two micro-channel bases, and the upper end of the micro-channel base is provided with an array of uniformly distributed annular opening microstructure arrays. The annular opening microstructure comprises an annular micro-channel and a central hole arranged in the annular micro-channel. The central hole is in communication with the annular micro-channels in the same row in the horizontal direction and with the annular micro-channels in the same column in the vertical direction. Thus, the cooling liquid flows in the multi-layer horizontal and vertical staggered micro-channels, forming a three-dimensional heat exchange structure, so that the heat exchange between the radiator and the cooling liquid is more sufficient, and the heat exchange efficiency is improved. The annular opening microstructure array divides the vertical micro-channels into several sections. When the liquid in the horizontal and vertical staggered micro-channels boils, the cooling liquid from each vertical micro-channel significantly disturbs the boiling bubbles generated in the horizontal and vertical staggered micro-channels, thereby inhibiting the boiling instability.
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