Heat Pipe With Segmented Vapor And Liquid Layers
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Solution Overview
Problem
Conventional heat pipes suffer from poor heat dissipation due to the working fluid's vapor and liquid phases not occurring cyclically, as they share the same tunnel, leading to interference and reduced thermal efficiency.
Innovation Solution
A heat pipe design featuring separate vapor and liquid layers with cavities and pores that allow for the vapor and liquid phases to move independently, preventing interference and enhancing cyclic evaporation and condensation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the working fluid evaporates and condenses in the same tunnel, then the structure is simple, but the heat dissipation efficiency is poor due to interference between vapor and liquid phases
Solution Approach 1:
The heat pipe is divided into separate vapor passage and liquid passage channels. The vapor passage includes a vapor generation portion and vapor condensation portion, while the liquid passage includes a liquid supply portion and liquid return portion. This segmentation allows independent operation of vapor and liquid phases, eliminating interference and improving heat dissipation efficiency.
Solution Approach 2:
The patent transitions from a single-dimensional tunnel structure to a multi-dimensional layered structure. The vapor passage and liquid passage are arranged in different layers with vertical communication between them, adding spatial dimensionality to separate the phases while maintaining structural integration.
2Ease of manufacture
If vapor and liquid phases share the same tunnel, then the manufacturing process is simple, but the cyclic evaporation and condensation is disrupted
Solution Approach 1:
The vapor passage and liquid passage are segmented into separate channels with distinct functions. The vapor passage handles vaporization and condensation, while the liquid passage manages liquid supply and return. This segmentation enables continuous cyclic operation without interference between phases.
Solution Approach 2:
A wick structure serves as an intermediary between the vapor passage and liquid passage. The wick facilitates liquid transfer from the liquid passage to the vapor passage through capillary action, enabling the cyclic process while maintaining phase separation.
3Productivity
If the working fluid spreads along the tunnel, then the vapor diffusion is limited, but the heat dissipation is poor due to lack of cyclic operation
Solution Approach 1:
The separate vapor and liquid passages ensure that vapor diffusion and liquid return occur in independent channels. The vapor passage maintains controlled vapor diffusion from the evaporation portion to the condensation portion, while the liquid passage ensures reliable liquid return, maintaining high thermal efficiency.
Solution Approach 2:
The patent utilizes phase transitions of the working fluid in separate passages. Vaporization occurs in the vapor generation portion, vapor diffuses through the vapor passage, condenses in the vapor condensation portion, and liquid returns through the liquid passage. This separated phase transition process maintains high reliability and heat dissipation rate.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design improves heat dissipation by allowing for efficient vapor and liquid phase separation, ensuring cyclic thermal processes and uniform thermal diffusion in all directions, independent of the heat pipe's orientation.
Implementation Method 1
The heat pipe utilizes a phase change of a working fluid to transfer heat
Implementation Method 2
the working fluid evaporates in a vicinity of the evaporation part
Implementation Method 3
a vapor layer configured to move the vapor of the working fluid that is vaporized
Implementation Method 4
the working fluid that is condensed and returned
Implementation Method 5
when the working fluid that is cooled, condensed, and liquefied returns to the evaporation part
Implementation Method 6
a liquid layer configured to move a working fluid that is liquefied from vapor
Data Source
AI summary
A heat pipe includes a first metal layer forming a liquid layer configured to move a working fluid that is liquefied from vapor, and a second metal layer forming a vapor layer configured to move the vapor of the working fluid that is vaporized. The first metal layer includes first cavities that cave in from a first surface of the first metal layer and are arranged apart from each other, second cavities that cave in from a second surface of the first metal layer opposite to the first surface of the first metal layer, first pores partially communicating with the first cavities and the second cavities, respectively, and second pores partially communicating side surfaces of the second cavities that are adjacent to each other. The second metal layer is provided on the first surface of the first metal layer and includes an opening exposing the plurality of first cavities.