Heat Pipe Variable-Thickness Capillary Structure for Continuous Flow
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Solution Overview
Problem
Conventional heat pipes exhibit inefficient cooling cycles due to inadequate capillary structure design, leading to suboptimal heat dissipation efficacy in electronic devices and machinery.
Innovation Solution
A heat pipe with a composite capillary structure featuring a first capillary structure with variable thickness and a second capillary structure, where the first capillary structure has a grooved shape and is integrated with the pipe body, and the second capillary structure is disposed on the first structure, enhancing capillary force and permeability to improve fluid flow and reduce thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional capillary structure is used in heat pipes, then the structure is simple and easy to manufacture, but the cooling cycle efficiency is insufficient and heat dissipation efficacy is suboptimal
Solution Approach 1:
The capillary structure is divided into multiple layers: a first capillary structure with grooves and a second capillary structure with pores, creating a composite hierarchical system that improves fluid flow efficiency and heat dissipation performance
Solution Approach 2:
The second capillary structure is disposed on the first capillary structure, forming a nested composite configuration where the porous structure is integrated within the grooved structure to enhance capillary force and permeability simultaneously
2Reliability
If the capillary structure has uniform thickness, then the manufacturing process is simple, but the fluid flow is insufficient and dry burning risk increases
Solution Approach 1:
The first capillary structure features variable thickness with grooves at different depths, creating local variations in capillary force to enhance fluid flow distribution and prevent dry burning while maintaining manufacturability
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
The variable thickness capillary structure design improves heat dissipation efficiency by ensuring continuous fluid flow and reducing the risk of dry burning, thereby enhancing the cooling performance of the heat pipe.
Implementation Method 1
the liquid cooling fluid in the heat pipe absorbs heat at the evaporation end, the liquid cooling fluid vaporizes
Implementation Method 2
moves to the condensation end by vapor pressure
Implementation Method 3
the gaseous cooling fluid at the condensation end is exothermic and condensed into liquid cooling fluid
Implementation Method 4
the liquid cooling fluid flows back to the evaporation end through capillary structures inside the heat pipe
Data Source
AI summary
A heat pipe includes a pipe body having an evaporation section, a condensation section, and a transmission section, the evaporation section and the condensation section are respectively connected to opposite ends of the transmission section, and a composite capillary structure including a first capillary structure and at least one second capillary structure, the first capillary structure having a grooved shape and being disposed on an inner surface of the pipe body, the second capillary structure being at least partially disposed on the first capillary structure, the first capillary structure and the at least one second capillary structure extending from the evaporation section to the condensation section, wherein the composite capillary structure has a variable thickness within the evaporation section.