Outdoor Light Fixture Modular Racks Heat Dissipation
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Solution Overview
Problem
Outdoor lighting fixtures face challenges such as overheating of power circuits, complex LED installation and orientation, and maintenance difficulties due to elevated positions.
Innovation Solution
The design incorporates removable racks with sealed lighting modules and heat sinks, a hinged housing for rear access, and a convection exhaust duct to manage heat and facilitate assembly, disassembly, and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a large number of LEDs are installed in outdoor lighting fixtures at significant distances from the ground, then the lighting coverage and illumination intensity are improved, but the heat dissipation becomes more difficult and maintenance accessibility deteriorates
Solution Approach 1:
The lighting fixture is divided into multiple independent modules, each containing a specific number of LEDs (e.g., 3 LEDs per module). These modules are mounted on racks that can be separately installed and maintained. This segmentation allows heat to be distributed across multiple smaller units with individual heat sinks, improving overall heat dissipation while maintaining high illumination intensity through the collective array of modules.
Solution Approach 2:
Heat sinks are introduced as intermediary thermal management components between the LEDs and the housing structure. These heat sinks act as thermal mediators that capture heat from the LEDs and transfer it to the surrounding environment through the housing walls, effectively managing the thermal load generated by the large number of LEDs installed at elevated positions.
2Illumination intensity
If LEDs are installed on curved surfaces or in complex orientations to direct light towards specific areas, then the lighting directionality and coverage are improved, but the manufacturing complexity and installation difficulty increase
Solution Approach 1:
Instead of bending or curving the LED modules themselves to achieve the desired light direction, the invention inverts the approach by keeping the LED modules flat and standard, and instead orienting the entire racks and modules at the required angles during installation. This allows the use of simple, flat LED modules that are easy to manufacture while achieving complex lighting patterns through strategic rack positioning and orientation.
Solution Approach 2:
The invention transitions from two-dimensional curved surface mounting to three-dimensional spatial positioning of flat modules. By utilizing the third dimension (vertical and angular positioning of racks), the system achieves complex light distribution patterns without requiring the LED modules themselves to be curved or complexly shaped, thereby simplifying manufacturing while maintaining lighting effectiveness.
3Illumination intensity
If outdoor lighting fixtures are mounted in elevated positions to provide adequate lighting coverage, then the lighting effectiveness is improved, but the accessibility for maintenance and repair works deteriorates
Solution Approach 1:
The lighting fixture is segmented into multiple independent racks and modules that can be individually accessed and maintained. The housing is designed with access panels or removable sections that allow maintenance personnel to reach the elevated modules without requiring complete disassembly or special equipment, thereby maintaining lighting effectiveness at elevated positions while improving maintenance accessibility.
Solution Approach 2:
The housing structure incorporates platforms, ladders, or adjustable access mechanisms that bring the maintenance interface to the same effective working level as the LED modules, even when mounted at elevated positions. This creates an equipotential working condition where maintenance personnel can access and service the high-mounted fixtures with the same ease as ground-level equipment, eliminating the accessibility disadvantage of elevated installation.
4Strength
If the housing is designed as a single integrated unit, then the structural strength and sealing are improved, but the ease of assembly and disassembly for maintenance deteriorates
Solution Approach 1:
The housing is segmented into a modular structure comprising a main housing body, removable racks, and interchangeable LED modules. Each segment can be independently assembled, installed, and maintained. The modular design maintains structural integrity through standardized connection interfaces and sealing mechanisms while enabling easy assembly and disassembly of individual components for maintenance purposes.
Solution Approach 2:
The housing incorporates dynamic or adjustable elements such as removable panels, telescopic sections, or adjustable racks that can be easily configured during installation and maintenance. These dynamic features allow the structure to adapt between a closed, structurally-integral state for operation and an open, accessible state for maintenance, balancing structural strength with ease of repair.
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 solution simplifies LED replacement, improves heat dissipation, and enhances maintenance accessibility and efficiency, addressing the specific drawbacks of existing outdoor lighting fixtures.
Implementation Method 1
said racks have at the rear area heat sinks for dissipating the heat generated by the LEDs of the lighting modules
Implementation Method 2
heat sinks for dissipating the heat generated by the LEDs
Implementation Method 3
said back cover defining, together with the housing, a convection exhaust duct for the heat released by the heat sink
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Outdoor lighting fixture, comprising a housing (1) intended to be mounted in a recess of a structure or supporting surface, which has a plurality of LEDs that are connected to at least one control unit. The housing (1) comprises a peripheral frame (2), frontally closed by a translucent plate (3) and at its rear end by a rear plate (4) having a plurality of openings (41) that are suitable for the assembly and fixing of removable racks (5), on which sealed lighting modules (6) are mounted. The racks (5) have heat sinks (53). Each lighting module (6) comprises at least one row of LEDs (61) connected to a printed circuit frontally covered by lenses (62) of complex surface that are suitable for guiding the light emitted by the LEDs (61) towards a certain direction.