Troffer Vent Aperture and Conductive Sheet Heat Dissipation
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Solution Overview
Problem
Conventional lighting systems face issues with heat dissipation, leading to increased temperatures and potential hazards, especially in indirect lighting systems where heat sinks are aesthetically unpleasing and costly, and direct attachment of printed circuit boards can cause glare and shadows.
Innovation Solution
The solution involves a lighting apparatus with a printed circuit board having vent apertures and thermally conductive sheets to enhance heat dissipation through conduction, convection, and radiation, while maintaining an aesthetically pleasing design by hiding the thermal management system from view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat sinks are used to dissipate heat away from light sources, then heat dissipation effectiveness is improved, but system cost increases and aesthetic appearance deteriorates
Solution Approach 1:
The printed circuit board is designed to serve dual functions: electrical circuit support and heat dissipation. By incorporating thermally conductive materials and extending surface geometry into the PCB, the invention eliminates the need for separate heat sink components, thereby reducing system cost while maintaining heat dissipation effectiveness.
Solution Approach 2:
The heat dissipation function is extracted from separate heat sink components and integrated directly into the printed circuit board structure. This integration removes the need for additional aesthetic-impairing components while maintaining thermal management effectiveness.
2Temperature
If printed circuit board is directly attached to troffer housing to increase conduction, convection, and radiation, then heat dissipation is improved, but lighting quality deteriorates due to glare and shadows
Solution Approach 1:
The PCB design incorporates localized thermal management features including thermally conductive pathways positioned away from light-emitting regions, and vent apertures strategically placed to facilitate heat dissipation without interfering with light distribution. This allows heat dissipation and lighting quality to be optimized in different spatial zones.
3Temperature
If conventional heat dissipation methods are used, then heat removal is achieved, but system complexity increases and aesthetic appearance deteriorates
Solution Approach 1:
The invention merges the heat dissipation function with the existing PCB structure by incorporating thermally conductive materials, extending surfaces, and vent apertures directly into the board design. This integration eliminates the need for separate heat sink components and complex assembly procedures, thereby reducing system complexity while maintaining effective heat removal.
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 approach effectively reduces the temperature of the lighting system, increases its efficiency and longevity, and minimizes glare, providing a cost-effective and aesthetically superior heat dissipation method.
Implementation Method 1
The vent aperture in the printed circuit board can help increase convection between the printed circuit board and the ambient
Implementation Method 2
a first thermally conductive sheet thermally coupled to the printed circuit board and extending over the first back side of the first optical member
Implementation Method 3
act as an extended heat transfer surface that can help increase heat dissipation away from the printed circuit board and the first light source via increased conduction, convection, and radiation from the thermally conductive sheet
Data Source
AI summary
A lighting apparatus includes a printed circuit board. A first light source and a second light source can be mounted on the printed circuit board. A first optical member can receive and redirect light from the first light source, and a second optical member can receive and redirect light from the second light source. A vent aperture can be defined in the printed circuit board, the vent aperture being positioned between the optical members. The apparatus can include first and second thermally conductive sheets thermally coupled to the printed circuit board, the first thermally conductive sheet disposed on a first back side of the first optical member, the second thermally conductive sheet disposed on a second back side of the second optical member. The apparatus can include a housing having a housing vent, the housing vent and the vent aperture defining a first convective path between the optical members.