Rotating Heat-Sink-Impeller for CPU Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The thermal management of CPUs is hindered by the limitations of traditional 'heat-sink-plus-fan' (HSPF) devices, which face challenges in reducing boundary layer thickness and mechanical efficiency, leading to high electrical power consumption, size, and noise, limiting further advancements in CPU performance due to fundamental physical constraints.
Innovation Solution
A new air-cooled heat exchanger architecture that uses a rotating heat-sink-impeller structure supported by a gas bearing, eliminating the need for a fan by utilizing centrifugal pumping to circulate air and reduce boundary layer thickness, thereby enhancing heat transfer efficiency and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a traditional heat-sink-plus-fan device is used to remove heat from CPUs, then heat transfer is achieved, but electrical power consumption, device size, and noise increase due to the fan and boundary layer limitations
Solution Approach 1:
The patent extracts and eliminates the fan component from the traditional heat-sink-plus-fan architecture. By removing the fan, the invention eliminates the associated electrical power consumption, noise, and mechanical complexity while maintaining heat transfer functionality through the rotating heat-sink-impeller structure that uses centrifugal pumping instead
Solution Approach 2:
The patent replaces the mechanical fan-driven air circulation system with a rotating heat-sink-impeller structure that uses centrifugal pumping. This substitution eliminates the need for a separate fan motor and blade assembly, reducing electrical power consumption and mechanical complexity while achieving the same air movement and heat transfer objectives
2Temperature
If a traditional heat-sink-plus-fan device is used, then heat removal is achieved, but device size increases due to fan and heat sink components
Solution Approach 1:
The patent merges the heat sink and fan functions into a single integrated rotating heat-sink-impeller structure. By combining these previously separate components into one unified rotating assembly, the invention reduces overall device size and volume while maintaining both heat transfer and air circulation capabilities
Solution Approach 2:
The rotating heat-sink-impeller structure serves multiple functions simultaneously: it acts as a heat sink for thermal management, an impeller for centrifugal pumping of air, and a rotor for the motor assembly. This multi-functionality eliminates the need for separate fan and heat sink components, thereby reducing device size
3Temperature
If a traditional heat-sink-plus-fan device is used, then heat transfer is achieved, but noise increases due to fan operation
Solution Approach 1:
The patent extracts and removes the fan component from the system. By eliminating the fan, the invention removes the primary source of noise generation associated with traditional CPU cooling devices, while maintaining heat transfer efficiency through the rotating heat-sink-impeller structure
4Temperature
If a traditional heat-sink-plus-fan device is used, then air circulation is achieved, but boundary layer thickness remains high, limiting heat transfer efficiency
Solution Approach 1:
The patent introduces dynamic rotation to the heat sink structure, creating a rotating heat-sink-impeller assembly. This rotation generates centrifugal pumping action that actively moves air through the heat sink fins, disrupting the boundary layer and enhancing heat transfer efficiency compared to static traditional heat sinks
5Speed
If a traditional heat-sink-plus-fan device is used, then mechanical air pumping is achieved, but device complexity increases due to fan and mounting components
Solution Approach 1:
The patent combines the fan, heat sink, and motor components into a single integrated rotating heat-sink-impeller assembly. This merging eliminates the need for separate fan mounting brackets, fasteners, and alignment mechanisms, thereby reducing device complexity while maintaining airflow performance
Solution Approach 2:
The rotating heat-sink-impeller structure performs multiple functions: heat dissipation, air circulation, and motor rotor operation. This multi-functionality eliminates the need for separate fan and heat sink assemblies and their associated mounting hardware, reducing overall device complexity
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 significantly reduces thermal resistance, increases volumetric flow rate, and decreases electrical power consumption, achieving improved heat transfer efficiency while minimizing noise and size, thus overcoming the limitations of traditional HSPF devices.
Implementation Method 1
a rotating heat-sink-impeller structure supported by a gas bearing
Implementation Method 2
utilizing centrifugal pumping to circulate air
Implementation Method 3
reduce boundary layer thickness, thereby enhancing heat transfer efficiency
Data Source
AI summary
Systems and methods for a forced-convection heat exchanger are provided. In one embodiment, heat is transferred to or from a thermal load in thermal contact with a heat conducting structure, across a narrow air gap, to a rotating heat transfer structure immersed in a surrounding medium such as air.