Synthetic Jet Ejector Cooling for Compact LED Modules
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Solution Overview
Problem
Existing thermal management technologies struggle to effectively cool high-power, compact LED light sources due to design constraints and limitations in scaling up previous solutions.
Innovation Solution
The integration of a tabular synthetic jet ejector with a heat sink having a plurality of fins and channels, where the synthetic jet ejector directs jets along the longitudinal axis of the channels to enhance heat exchange by disrupting boundary layers, combined with an LED module and heat sink for efficient thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional fan based systems or traditional thermal management devices are used, then global fluid flow through the device is provided, but localized cooling for hot spots is insufficient and boundary layer perturbation is limited
Solution Approach 1:
The thermal management system is segmented into two functional components: a conventional fan-based system providing global fluid flow and synthetic jet ejectors providing localized cooling. This segmentation allows each component to optimize its specific function without overwhelming complexity.
Solution Approach 2:
Synthetic jet ejectors serve as intermediary devices that bridge the gap between global fluid flow systems and localized hot spot cooling requirements. They perturb boundary layers to enhance heat transfer at specific locations without requiring a complete system redesign.
2Power
If thermal management systems are scaled up for high-power LED applications, then cooling capacity increases, but design constraints and limitations prevent effective cooling of compact LED light sources
Solution Approach 1:
The synthetic jet ejectors provide locally optimized cooling quality at hot spot locations within compact LED modules. This local quality enhancement allows high-power LEDs to be cooled effectively without requiring proportional increases in overall system size.
Solution Approach 2:
The invention transitions from two-dimensional heat sink surfaces to three-dimensional synthetic jet flow structures that actively perturb boundary layers. This dimensional enhancement allows more effective heat removal from compact high-power LED sources.
3Productivity
If synthetic jet actuators are used in conjunction with conventional fan based systems, then localized cooling and boundary layer perturbation are achieved, but device complexity increases
Solution Approach 1:
The hybrid thermal management system merges conventional fan-based global flow with synthetic jet ejector localized cooling into a unified architecture. This merging achieves synergistic heat removal while maintaining manageable system complexity through integrated design.
Solution Approach 2:
The synthetic jet ejectors perform multiple functions simultaneously: they provide localized cooling at hot spots, augment global fluid flow through boundary layer perturbation, and can be integrated into existing fan-based systems without requiring complete system replacement.
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 configuration provides efficient cooling for LED modules by leveraging the turbulence of synthetic jets to improve heat exchange, addressing the thermal management challenges of high-power, compact LED light sources.
Implementation Method 1
directs jets along the longitudinal axis of the channels to enhance heat exchange by disrupting boundary layers
Implementation Method 2
leveraging the turbulence of synthetic jets to improve heat exchange
Implementation Method 3
a heat sink disposed on said third surface, said heat sink comprising a plurality of fins and having a plurality of channels formed by adjacent fins
Data Source
AI summary
An LED light source (101) is provided which comprises an LED module (103) containing an LED (113); a heat sink (107) disposed about the periphery of the LED module; and a tabular synthetic jet ejector (105) disposed on said LED module and being adapted to direct a plurality of synthetic jets across surfaces of said heat sink.