Parallel-Plate High-Lumen Luminaire for Free-Convection Cooling
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Solution Overview
Problem
Existing high-lumen luminaires face thermal challenges due to high heat generation and inefficient light distribution, often requiring bulky diecast heatsinks and struggling to effectively dissipate heat while maintaining high light output.
Innovation Solution
A lighting apparatus with parallel vertical plates separated by an optimized distance for free convection, featuring light arrays and reflectors to redirect light downward, utilizing air flow for heat dissipation and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-lumen LED luminaires are used to illuminate large industrial spaces, then light output is improved, but heat generation increases reducing luminaire lifetime
Solution Approach 1:
The patent transitions from traditional horizontal heat dissipation surfaces to vertical heat dissipation surfaces. The LED modules are mounted on vertical plates that extend upward, creating vertical convection currents that efficiently carry heat away from the LED junctions. This dimensional change in heat dissipation geometry significantly improves thermal management while maintaining high light output.
Solution Approach 2:
The luminaire is divided into multiple separate vertical plates, each containing LED modules. The plates are spaced apart to create convection channels, segmenting the heat dissipation function across multiple surfaces rather than relying on a single large heatsink. This segmentation enhances natural convection efficiency and reduces thermal coupling between LED modules.
2Temperature
If traditional diecast heatsinks are used for heat dissipation, then heat dissipation capacity is improved, but luminaire size and weight increase
Solution Approach 1:
The patent replaces traditional mechanical diecast heatsinks with a natural convection-based thermal management system. Vertical plates with strategically designed convection channels utilize buoyancy-driven air flow to dissipate heat, eliminating the need for heavy diecast aluminum heatsinks while maintaining effective heat dissipation capacity.
Solution Approach 2:
The patent changes the geometric parameters of the heat dissipation structure by using thin vertical plates with specific spacing rather than bulky diecast forms. The plate thickness, spacing distance, and vertical extent are optimized to maximize natural convection efficiency, achieving lightweight design without sacrificing thermal performance.
3Temperature
If traditional heatsink designs are used, then heat dissipation is improved, but luminaire complexity and bulkiness increase
Solution Approach 1:
The vertical plates serve multiple functions simultaneously: they provide structural support for mounting LED modules, act as heat dissipation surfaces through natural convection, and define the luminaire's aesthetic form. This multi-functionality eliminates the need for separate heatsink components, reducing overall structural complexity while maintaining effective heat dissipation.
Solution Approach 2:
The patent merges the structural support function and heat dissipation function into a single integrated vertical plate structure. The plates that hold the LED modules also serve as the primary heat dissipation surfaces, combining what were traditionally separate components (mounting structure and heatsink) into a unified design that reduces complexity.
4Illumination intensity
If high bay luminaire configuration is used for high ceiling illumination, then illumination coverage is improved, but heat dissipation becomes more difficult
Solution Approach 1:
The patent exploits the vertical dimension by orienting heat dissipation surfaces vertically and allowing hot air to rise naturally along the vertical plates. This vertical orientation aligns with the natural convection current direction, maximizing heat dissipation efficiency in the high bay configuration where the luminaire is mounted far from the ground, making traditional horizontal heat dissipation approaches less effective.
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 effectively dissipates heat through free convection, maintaining high lumen output while preventing overheating and reducing the luminaire's bulkiness, enhancing its performance in industrial and commercial settings.
Implementation Method 1
a first vertical plate. The first vertical plate is arranged perpendicular to ground... a second vertical plate. The second vertical plate is arranged in parallel with the first vertical plate. The second vertical plate is separated from the first vertical plate by an optimized distance... optimizes free convection within the lighting apparatus
Implementation Method 2
a reflector arranged around each light array... Each reflector is arranged around the light array of the corresponding parallel plate to direct at least a portion of the light towards the ground
Data Source
AI summary
A lighting apparatus (100), comprising: a set of a first and second vertical plates (102, 104) arranged in parallel and perpendicular to the ground (200) and separated by an optimized distance (106); first and second light arrays (108, 110) arranged on the exterior sides of the first and second vertical plates (102, 104); first and second reflectors (112, 114) arranged around the first and second light arrays (108, 110); first and second driver plates (116, 118) arranged in parallel on the exterior sides of the first and second vertical plates (102, 104); a first driver (120) arranged on the first driver plate (116), wherein the first driver (120) is electrically coupled to the first light array (108); and a second driver (122) arranged on the second driver plate (118), wherein the second driver (122) is electrically coupled to the second light array (110).