Lighting Fixture Extruded Aluminum Rail Heat Dissipation
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Solution Overview
Problem
Conventional recessed lighting fixtures are not ideal for solid-state light emitters like LEDs, as they operate poorly in high temperatures, and require multiple LEDs to match the light output of a single incandescent bulb, posing installation challenges and energy inefficiencies.
Innovation Solution
A lighting fixture design featuring extruded aluminum profile rails with a sliding engagement mechanism and spring clips for secure mounting, allowing for easy installation and heat management with an external heat sink, accommodating solid-state light emitters while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LED light sources are used to match the light output of a single incandescent bulb, then the light output is sufficient, but the device complexity and installation difficulty increase
Solution Approach 1:
The lighting fixture is divided into modular components including a separate trim assembly and can assembly that can be independently installed and configured. The multiple LED light sources are arranged in a modular fashion within the can assembly, allowing for easier installation and maintenance while achieving the required light output.
Solution Approach 2:
The trim assembly serves multiple functions: it provides the mounting interface for the can assembly, acts as a decorative cover, and facilitates heat dissipation. The universal design allows the same trim assembly to accommodate different can assemblies with various LED configurations.
2Ease of operation
If conventional recessed lighting fixtures are used, then installation is straightforward, but heat management for solid-state light emitters is inadequate
Solution Approach 1:
Heat dissipation is addressed by extending the heat sink structure from the internal can assembly to the external trim assembly. The fins on the trim assembly provide additional surface area for heat dissipation in the radial direction, moving the heat management solution from a purely internal to an external-dimension approach.
Solution Approach 2:
The trim assembly acts as an intermediary heat transfer component, conducting heat from the LED light sources through the can assembly and dissipating it through the finned external structure. This intermediary structure protects the heat-generating components while efficiently managing thermal energy.
3Reliability
If conventional airtight can fixtures are used, then heat is trapped within the can, but special insulation is required to prevent fire
Solution Approach 1:
The heat that would normally be trapped and create fire risk is converted into a manageable thermal flow path. The finned trim assembly provides a controlled heat dissipation route that safely directs thermal energy away from flammable ceiling materials, transforming the harmful heat accumulation into a beneficial heat management system.
Solution Approach 2:
The thermal parameters of the fixture are changed by introducing external heat dissipation surfaces. The large surface area of the fins on the trim assembly fundamentally alters the heat transfer dynamics, moving from heat trapping to active heat dissipation, thereby reducing the temperature within the can assembly to safe levels.
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 solution enables efficient installation and secure mounting of solid-state light emitters, effectively managing heat and providing comparable light output to traditional fixtures with reduced energy consumption and extended LED lifespan.
Implementation Method 1
spring clips for secure mounting
Implementation Method 2
extruded aluminum profile rails with a sliding engagement mechanism and spring clips for secure mounting, allowing for easy installation and heat management with an external heat sink
Data Source
AI summary
A lighting fixture comprises a mounting assembly and two rails. At least one of the rails is slidable relative to the mounting assembly. The rails are each extruded, and have profiles which are substantially similar to each other. Each rail has a male component which fits within a female component of the other. Also, a fixture comprising a mounting assembly comprising an opening through which a light engine housing can be inserted, and (1) a spring clip and/or (2) a clip engagement structure. Also, a fixture comprising a mounting assembly, a first set of rails, and a supplemental rail. The supplemental rail is slidable relative to the light emitting element mounting assembly. Also, a fixture comprising a mounting assembly, a set of rails, and an engagement element having a first portion being in contact with a first rail and a second portion in contact with the second rail.