Coreless ring-shaped heat plate

By designing a grooved structure and a multi-stage Tesla valve system in a coreless annular heat exchanger, unidirectional circulation of the working medium is achieved, solving the problems of difficult manufacturing and insufficient capillary force of traditional heat exchangers, and improving heat transfer performance and ultimate heat dissipation capacity.

CN116255849BActive Publication Date: 2026-07-07SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Filing Date
2023-02-06
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Traditional vapor chambers have difficult-to-manufacture liquid wicks and insufficient capillary force, which leads to increased flow resistance and decreased heat transfer performance, resulting in a reduction in ultimate heat flux density.

Method used

A coreless annular heat spreader is designed, which uses a grooved structure and a multi-stage Tesla valve system in a ring inside a sealed cavity to form an internal flow channel. The working medium circulates unidirectionally during evaporation and condensation, and continuous heat dissipation is achieved by utilizing pressure wave pulsation.

Benefits of technology

It improves the ultimate heat dissipation capacity, reduces flow resistance and liquid backflow, delays the drying out of the working medium, and enhances heat transfer performance.

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    Figure CN116255849B_ABST
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Abstract

The application discloses a coreless ring-shaped heat uniformizing plate, which comprises two housings arranged in an upper and lower mode, the two housings are connected to form a sealed cavity, a central region of the sealed cavity is an evaporation region, and a surrounding region of the sealed cavity is a condensation heat exchange region; a plurality of groove structures are arranged in a ring mode in the sealed cavity, a unidirectional valve system is arranged between two adjacent groove structures, an inlet of the unidirectional valve system is communicated with a tail end of a previous-stage groove structure located in the condensation heat exchange region, and an outlet of the unidirectional valve system is communicated with a head end of a next-stage groove structure located in the evaporation region, so that liquid working medium of the previous-stage groove structure flows to the next-stage groove structure, the groove structures are sequentially connected in a head-to-tail mode through the adjacent unidirectional valve systems, and an internal flow channel located in the sealed cavity is formed to supply unidirectional circulation of working medium. The application can solve the problems of manufacturing difficulty, insufficient capillary force, increased flow resistance and low heat transfer limit caused by a liquid absorbing core of a traditional heat uniformizing plate.
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