Heat pipe with improved performance under various distributions of thermal loads

The introduction of a circumferential transfer channel in heat pipes addresses the issue of uneven thermal load distribution by redistributing liquid between grooves, preventing drying and ensuring consistent performance.

EP4092371B1Active Publication Date: 2025-04-02EURO HEAT PIPES
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Patent Information

Application Number
EP2022174302
Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-05-20
Filing Date
2022-05-19
Publication Date
2025-04-02
Estimated Expiration
2042-05-19

AI Technical Summary

Technical Problem

Heat pipes with uneven thermal load distribution can lead to differential usage of grooves, resulting in some grooves being overstressed while others are underutilized, potentially causing drying issues.

Method used

Incorporating a circumferential transfer channel that connects and fluidly communicates between longitudinal channels, allowing liquid to be redistributed from less stressed grooves to more stressed ones, thereby preventing drying.

Benefits of technology

The circumferential transfer channel effectively redistributes liquid to the most stressed grooves, preventing partial or total drying and ensuring consistent thermal performance across the heat pipe.

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Abstract

Heat pipe (1) comprising an extruded profiled body (10), with a hollow body closed at the ends, filled with a predefined volume of two-phase working fluid, with a plurality of longitudinal channels (3), each having a cross-section delimited by a bottom (76) formed by a peripheral tubular wall (75) of the profiled body, and laterally by two longitudinal walls (2). A circumferential transfer channel (6), arranged transversely to the local axial direction (X), is provided at a position along the longitudinal path (PX) and / or at one end, which connects the longitudinal channels to each other, the longitudinal walls being interrupted, partially or totally, at the circumferential channel, with the optional use of a closing ring (4).
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Citation Information

Patent Citations

  • heat pipe

    DE202005021911U1

  • Heat pipe with composite capillary wick structure

    US20070240855A1

  • Composite-type heat type

    US20200248970A1

  • Method of making micro channel heat pipe having corrugated fin elements

    US6216343B1