Heat Sink Load Vectoring for Targeted Pressure Distribution
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Solution Overview
Problem
Existing cooling systems for computing equipment often fail to distribute load evenly between heat sinks and components, leading to inefficient heat transfer due to surface irregularities, which can result in uneven pressure and bond line thickness, thereby affecting cooling efficiency.
Innovation Solution
A heat sink with multiple load cells that provide varying tensile loads across different attachment points, allowing for an intentionally uneven load distribution to be achieved, either through adjustable load cells or component design modifications, to optimize thermal performance by matching the load distribution with the component's geometry and hot spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If uniform load cells are used to attach the heat sink to the component, then the structure is simple and easy to manufacture, but the load distribution is uneven due to surface irregularities, resulting in poor heat transfer performance
Solution Approach 1:
The patent applies local quality by making each load cell adjustable to provide a different tensile load than others, allowing specific regions of the heat sink to exert different pressures on the component surface. This enables high-pressure zones to be strategically positioned over hot spots and thin bond line regions, optimizing heat transfer where most needed while maintaining structural complexity through adjustable rather than permanently differentiated components
Solution Approach 2:
The patent implements parameter changes by allowing the tensile load of each load cell to be independently adjusted to different values. This enables the system to transition from uniform load distribution to a customized non-uniform distribution that matches the component's thermal requirements, with each load cell's mechanical parameter (tensile load) being tuned to achieve optimal thermal performance
2Reliability
If pressure is increased to improve heat transfer, then heat transfer efficiency improves, but surface irregularities cause uneven pressure distribution that may not align with hot spots
Solution Approach 1:
The patent applies feedback by using the known geometry and hot spot locations of the component to determine an optimal load distribution, then configuring the load cells to match this target distribution. The adjustable nature of the load cells allows iterative tuning and optimization based on thermal performance measurements, creating a feedback loop between thermal analysis and mechanical configuration
Solution Approach 2:
The patent implements preliminary action by experimentally determining the optimal load distribution before finalizing the heat sink configuration. Test load cells are tightened by differing amounts and thermal performance is measured in advance to identify the configuration that produces the greatest heat loss or lowest component temperatures, allowing the final system to be pre-optimized rather than relying on uniform or trial-and-error approaches
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 approach enhances cooling efficiency by ensuring that areas with the greatest need for heat dissipation receive the intended load, resulting in improved heat transfer and lower operating temperatures for computer hardware components.
Implementation Method 1
each of the load cells being configured to provide a tensile load between a respective load point on the heat sink and a respective attachment point on the component
Implementation Method 2
Heat transfer from the component to the heat sink is typically greater where pressure between the component and the heat sink is greater
Implementation Method 3
cooling systems for computing equipment have been developed
Data Source
AI summary
A heat sink includes multiple load points and a plurality of load cell for each of the load points. Each of the load cells is configured to attach to a respective attachment point on a component and to create a tensile load between the respective attachment point of the component and a respective one of the load points of the heat sink. At least one of the load cells is configured to produce a different maximum tensile load than another load cell among the plurality of load cells.