LED Lamp Hollow Element Passive Cooling Design
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Solution Overview
Problem
Existing LED lamps with passive cooling are limited to power dissipations of up to 10 W due to inadequate heat dissipation, restricting their operational range and efficiency compared to incandescent lamps.
Innovation Solution
The LED lamp design incorporates a support with hollow elements and air passage openings for airflow, combined with heat-conducting materials like aluminum or copper, and optional cooling ribs and a fan for enhanced heat dissipation, allowing for higher power operation without forced convection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive cooling is used in LED lamps, then the lamp structure remains simple and maintenance-free, but the power dissipation is limited to about 10 W
Solution Approach 1:
The patent introduces a hollow element with a cavity that creates a three-dimensional cooling structure with air passage openings. This dimensional approach allows air to flow through the cavity, providing effective cooling for higher power dissipation while maintaining a compact lamp structure that fits standard bulb volumes.
Solution Approach 2:
The support is segmented to include multiple air passage openings (at least two) that divide the cooling function into separate entry and exit points. This segmentation enables organized airflow through the hollow element, improving cooling efficiency without adding complex moving parts.
2Loss of energy
If higher power LEDs are used to replace incandescent lamps, then energy saving is improved, but heat dissipation becomes insufficient with conventional passive cooling
Solution Approach 1:
The patent applies pneumatic principles by introducing forced convection through a fan that drives air flow through the hollow element's cavity. This active airflow mechanism efficiently removes heat from high-power LEDs, enabling energy-efficient operation at power levels above 10 W while maintaining reliable thermal management.
Solution Approach 2:
The patent changes the cooling parameter from passive natural convection to active forced convection by incorporating a fan. This parameter change enables the system to handle higher heat loads from high-power LEDs, transforming the thermal management capability to match the increased power dissipation requirements.
3Adaptability or versatility
If retrofit LED lamps are designed to match incandescent lamp appearance, then compatibility is improved, but cooling efficiency is reduced due to limited space
Solution Approach 1:
The hollow element with its internal cavity is nested within the compact lamp structure, allowing the cooling function to be embedded within the limited space of a standard bulb volume. This nested design maintains external compatibility with incandescent lamp dimensions while providing sufficient internal volume for effective heat dissipation.
Solution Approach 2:
The patent utilizes the vertical dimension by positioning air passage openings at the base and top of the hollow element, creating a through-flow path that maximizes cooling efficiency within the constrained radial space of a standard bulb geometry.
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 design enables LED lamps to operate at higher power levels than 10 W with passive cooling, improving heat dissipation and extending the operational range while maintaining a similar appearance to incandescent lamps, thus addressing the limitations of previous retrofit LED lamps.
Implementation Method 1
each with at least two air passage openings to permit air flow through a cavity of at least one hollow element
Implementation Method 2
the support may have a well heat-conducting material for heat conduction
Data Source
AI summary
An LED lamp has a lamp base and a support connected to the lamp base, on which at least one LED is mounted, the support including at least one hollow element, each with at least two air passage openings to permit an air flow through a cavity of at least one hollow element.