Surface-Mounted Light Fixture Heat Sink for Lateral LED Cooling
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Solution Overview
Problem
LED light fixtures face challenges with heat build-up in electronic circuits, leading to reduced light output and shortened lifespan, necessitating effective heat dissipation solutions.
Innovation Solution
A light fixture design featuring a unitary formed heat sink with heat dissipating fins and a lensed enclosure that conducts heat laterally to fins extending beyond the light source, combined with a junction box for power distribution and moisture protection, allowing for efficient heat dissipation through conduction and convection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LEDs are implemented in light fixtures, then energy efficiency and robustness are improved, but heat build-up increases causing reduced light output and shortened lifespan
Solution Approach 1:
The heat sink is divided into multiple fins that segment the heat dissipation path, increasing surface area for heat transfer. Each fin acts as an independent heat dissipation element, allowing heat to be distributed across multiple pathways rather than concentrated in a single structure.
Solution Approach 2:
The heat dissipating fins extend in multiple directions (laterally and vertically) from the heat sink body, transitioning from a two-dimensional surface to a three-dimensional structure. This dimensional expansion significantly increases the heat dissipation surface area exposed to ambient air for convection.
2Temperature
If heat dissipating fins are added to the heat sink, then heat dissipation capability is improved, but device complexity increases
Solution Approach 1:
The heat dissipating fins are unitarily formed with the heat sink body as a single integrated structure. This merging of components eliminates the need for separate fin attachments or additional assembly steps, reducing manufacturing complexity while maintaining effective heat dissipation functionality.
3Temperature
If fins extend beyond the light source, then heat conduction path is improved, but manufacturing precision requirements increase
Solution Approach 1:
The fins are unitarily formed with the heat sink as an integrated structure, eliminating the need for precise separate positioning and attachment of fin components. This integration approach maintains effective heat conduction pathways while significantly reducing manufacturing precision requirements compared to assembling separate fin elements.
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 design maintains low temperatures at the LED junction, enhancing energy efficiency and lifespan while providing a rigid, moisture-resistant structure suitable for commercial environments.
Implementation Method 1
the heat generated by the light source travels by conduction laterally through the heat sink to the at least one coupled fin
Implementation Method 2
efficient heat dissipation through conduction and convection
Data Source
AI summary
A light emitting apparatus includes a light source, a unitary formed heat sink with a plurality of heat dissipating fins, a lensed enclosure that retains a light source and at least one power consuming device other than the light source. The lensed enclosure includes a recessed opening having at least a first wall that terminates at a substantially perpendicular second wall. The plurality of heat dissipating fins are disposed on at least one adjacent exterior side of the walled enclosure, the fins extending outwardly. At least one fin coupled to the heat sink extends beyond the light source, and the heat generated by the light source travels by conduction laterally through the heat sink to the at least one coupled fin.