LED Cooling System Using Dielectric Fluid Circulation
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Solution Overview
Problem
Conventional cooling techniques are insufficient for high-intensity LED lighting systems, as they fail to effectively manage the heat generated by densely packed LEDs, which can lead to overheating and damage, limiting the packing density and efficiency of LED systems.
Innovation Solution
A fluid-based cooling system that circulates a coolant over the LED assembly, using a pump to flow the coolant through a heat exchanger, where heat is removed and then returned to the LEDs, with a controller managing the flow rate and fan operation to maintain optimal temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If LED density is increased to provide high intensity lighting, then lighting power is improved, but heat generation increases and temperature rises
Solution Approach 1:
A dielectric fluid is introduced as an intermediary cooling medium between the LED array and the heat exchanger. The fluid circulates through channels in contact with the LED array, absorbing heat from the LEDs and transporting it to the heat exchanger where it is dissipated to the environment. This intermediary fluid enables effective heat removal from high-density LED configurations.
Solution Approach 2:
The patent employs a hydraulic cooling system where a dielectric fluid is pumped through channels to cool the LED array. The fluid circulation system, including pumps and heat exchangers, uses hydraulic principles to efficiently transfer heat away from the LED components, enabling high power density operation.
2Device complexity
If conventional cooling techniques are used, then device complexity is low, but heat dissipation is insufficient for high intensity LED systems
Solution Approach 1:
The cooling system is segmented into distinct functional components: a pump system to circulate dielectric fluid, internal cooling channels integrated with the LED array, and a separate heat exchanger unit. This segmentation allows each component to be optimized independently while working together to achieve effective heat dissipation for high-power LED systems.
Solution Approach 2:
The dielectric fluid serves as an intermediary heat transfer medium between the LED array and the heat exchanger. This intermediary enables efficient thermal coupling while electrically isolating the LED components, achieving both effective heat dissipation and electrical safety in a relatively compact configuration.
3Temperature
If heat sinks and fans are added to increase cooling, then heat dissipation is improved, but device complexity and space requirements increase
Solution Approach 1:
The cooling channels are merged with the LED array mounting structure, allowing the cooling fluid to flow directly through channels that are integral to the array housing. This integration eliminates the need for separate external heat sinks and reduces the overall footprint, achieving effective cooling without proportionally increasing device complexity or space requirements.
Solution Approach 2:
The system uses a hydraulic fluid circulation approach where dielectric fluid is pumped through internal channels to remove heat directly from the LED array. This replaces the need for large external heat sinks and high-velocity fans, achieving comparable or superior heat dissipation with reduced mechanical complexity and lower noise.
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 cooling system effectively manages heat dissipation in high-intensity LED systems, allowing for increased packing density and extended operation times without overheating, while maintaining light quality and efficiency.
Implementation Method 1
a fluid configured to flow over the LED assembly to cool LEDs emitting light and to remove heat produced by the LEDs
Implementation Method 2
A fluid-based cooling system that circulates a coolant over the LED assembly, using a pump to flow the coolant through a heat exchanger
Implementation Method 3
a heat exchanger, configured to remove the heat from the fluid
Implementation Method 4
circulates the coolant over the LED assembly, using a pump to flow the coolant through a heat exchanger
Data Source
AI summary
A cooling system for a light emitting diode assembly includes a heat exchanger configured to exchange heat from a fluid to ambient air, an enclosure configured to house the LED assembly, and a pump configured to circulate the fluid through the enclosure, through the LED assembly, or both, and through the heat exchanger. The fluid is configured to absorb heat at the LED assembly and generated by the LED assembly, and the heat exchanger is configured to cool the fluid and remove the heat absorbed by the fluid at the LED assembly.