LED Heat Sink Shell with Louver Ventilation
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Solution Overview
Problem
The high cost of LED lighting structures is attributed to a lack of understanding in heat transfer science, particularly in natural convection, which is inefficient due to inadequate ventilation windows and varying installation angles affecting airflow.
Innovation Solution
A heat dissipation metal shell with a louver or staggered structure ventilation window, ensuring a permeation ratio of at least 0.20, and a contact heat-transfer surface for effective heat conduction, along with a reflecting cup to address glare issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ventilation windows are provided on heat dissipation metal shell, then heat dissipation efficiency is improved, but structural complexity increases
Solution Approach 1:
The heat dissipation metal shell is segmented into multiple functional regions: front shell with ventilation windows, rear shell with light source mounting, and side walls with louver structures. This segmentation allows each part to be optimized for its specific function while maintaining overall heat dissipation efficiency
Solution Approach 2:
The louver structure on the side wall is designed to be dynamically adjustable or optimally oriented to capture natural convection currents from multiple directions, adapting to varying installation angles and environmental conditions to maintain effective heat dissipation
2Productivity
If convection window openings are increased, then natural convection airflow is improved, but structural integrity deteriorates
Solution Approach 1:
The side wall incorporates a louver structure that creates a porous-like airflow path through the shell. The louver blades are spaced to allow sufficient air passage while maintaining the structural continuity of the metal shell, achieving both good airflow and structural integrity
Solution Approach 2:
The heat dissipation metal shell may utilize composite construction techniques, combining metal materials with appropriate structural reinforcements around the ventilation windows and louver areas, ensuring that the openings do not compromise the overall structural strength
3Loss of energy
If contact heat-transfer surface area is increased, then heat conduction efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The contact heat-transfer surface is merged with the natural structural components of the light source assembly, such as the mounting plate or heat sink base. This integration allows heat conduction without requiring separate, complex manufacturing processes for additional heat transfer components
Solution Approach 2:
The rear shell serves multiple functions: it provides structural support for mounting the light source, creates the contact heat-transfer surface for thermal conduction, and maintains the overall shell structure. This multi-functionality reduces manufacturing complexity while achieving effective heat transfer
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
Enhances heat dissipation efficiency and reduces costs by ensuring smooth airflow and effective heat transfer, while also mitigating glare through optimized ventilation and light reflection.
Implementation Method 1
part or all of the heat generated by the solid-state light source is transferred to the surface of the heat dissipation metal shell through the contact heat-transfer surface
Implementation Method 2
Natural convection heat transfer is the best choice for the LED lighting. However, those skilled in the art generally do not know that the power-driven natural convection of air flow is very weak, ensuring the smooth air flow, especially the convection from the bottom to the top, is the most critical in the natural convection.
Data Source
AI summary
The invention proposes a solid-state light heat dissipation metal shell (1) and a light-source engine, a. using the shell as a heat sink and adopting a metal plate to process and shape; b. optimizing the wall thickness of the heat dissipation metal shell (1); c. the side wall (2) is made by the stretch of the metal plate from a rear shell (9) or/and a front shell (4), and provided with a ventilation window (3) with a louver type or staggered structure; d. a reflecting cup (26) is provided to solve the glare problem. The invention also proposes a production method and a mold thereof.