Solid-Core Aluminum Radiator with Integral Fins
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Solution Overview
Problem
Conventional heat sinks face challenges in achieving high cooling efficiency while maintaining robustness and cost-effectiveness, due to issues such as contact heat resistance, material procurement difficulties, and reliability concerns, particularly when using high heat conductance materials like copper, and complex manufacturing processes.
Innovation Solution
A radiator design featuring a solid-core columnar base and integrally formed radiating fins made of aluminum alloy, with a manufacturing method involving extrusion and cutting to create a heat sink that minimizes contact heat resistance and enhances cooling efficiency, using a simpler and more reliable assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high heat conductance materials like copper are used, then heat conductance is improved, but material procurement difficulty and cost increase
Solution Approach 1:
The invention changes the material parameter from copper to aluminum alloy, accepting a slight reduction in absolute heat conductance while achieving significant improvements in procurement ease, cost reduction, and manufacturing compatibility. This parameter substitution resolves the contradiction between heat conductance performance and manufacturing accessibility.
2Weight of moving object
If the base is made hollow to reduce weight, then weight is reduced, but structural robustness decreases
Solution Approach 1:
The invention changes the structural parameter from hollow to solid core, accepting increased weight while achieving significantly improved structural robustness, manufacturing simplicity, and heat conductance. This resolves the contradiction between weight reduction and structural strength.
3Reliability
If radiating fins are made thinner to increase surface area, then cooling efficiency is improved, but robustness and manufacturing difficulty worsen
Solution Approach 1:
The invention changes the fin thickness parameter to a moderate range that balances cooling efficiency with manufacturing feasibility. Rather than pursuing extreme thinness, the invention optimizes fin thickness to achieve satisfactory cooling performance while maintaining robustness and simplifying manufacturing through integral formation with the base.
4Reliability
If different materials are used for base and fins to optimize heat conductance, then heat conductance is improved, but manufacturing complexity increases
Solution Approach 1:
The invention applies homogeneity by using the same aluminum alloy material for both the base and radiating fins, eliminating the need for material transitions and multi-material manufacturing processes. This single-material approach resolves the contradiction between optimized heat conductance and manufacturing simplicity.
Solution Approach 2:
The invention merges the base and fins into a single integral structure formed by one extrusion process, eliminating the need for separate manufacturing and assembly of different materials. This combining approach resolves the manufacturing complexity while maintaining effective heat conductance.
5Reliability
If contact pressure between heat sink and MPU is increased to reduce contact heat resistance, then contact heat resistance is reduced, but fixing complexity increases
Solution Approach 1:
The invention changes the base structural parameter to solid-core construction, which provides inherent structural strength that enables simple fixing methods to achieve sufficient contact pressure. This resolves the contradiction between reducing contact heat resistance and simplifying the fixing process.
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 solution provides improved cooling efficiency, reduced contact heat resistance, and increased robustness, while being cost-effective and reliable, with the use of aluminum alloy allowing for complex shapes and high dimensional accuracy, thus addressing the limitations of previous technologies.
Implementation Method 1
a columnar base (11) which has a contact surface (131) and extends substantially perpendicularly to the contact surface (131), and whose region defined by the contact surface (131) is solid-core in a direction substantially perpendicular to the contact surface (131)
Implementation Method 2
a plurality of radiating fins (12) which extend outward from the base (11)
Data Source
AI summary
A heat sink has a plurality of radially extending radiating fins, which are arranged annularly on the outer circumferential surface of a cylindrical base to be integral with that surface. The base is formed to have a cylindrical shape having a center axis. The base is formed to be solid-core. The heat sink is ground such that a cooling object contact portion having a generally cylindrical shape projects from the end surface of the heat sink in the axial direction. An annular groove is ground out along the outer circumference of a contact surface of the cooling object contact portion. An attaching member is attached on the outer circumferential surface of the cooling object contact portion, and a pressure application portion is entirely pressed by a pressing machine. The pressure application portion is plastically deformed outward in the diameter direction, so that the attaching member is fixed in between.