LED Lamp Heat Sink Structure for Weight-Limited Thermal Dissipation
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Solution Overview
Problem
High-power LED lamps face challenges with heat dissipation, leading to reduced efficiency and lifespan due to inadequate thermal management, particularly in designs where weight and size constraints limit the effectiveness of heat sinks and power source cooling.
Innovation Solution
The LED lamp design incorporates a heat sink with interlaced Y-shaped fins and dual heat dissipating channels, enhancing natural convection and radiation, while the power source is strategically positioned to minimize thermal interference and improve air intake, allowing for efficient heat dissipation within weight and size limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heat sink weight is increased to improve heat dissipation area, then heat dissipation efficiency is improved, but the overall lamp weight exceeds the maximum weight limit
Solution Approach 1:
The heat dissipation system is segmented into two independent channels: a first heat dissipation channel for the power source and a second heat dissipation channel for the LED light source. This segmentation allows each channel to be optimized independently, enabling effective heat dissipation without requiring excessive heat sink weight, thus resolving the contradiction between heat dissipation efficiency and lamp weight.
2Reliability
If the heat sink size is increased to provide sufficient cooling area, then heat dissipation capability is improved, but the lamp dimensions exceed compact design requirements
Solution Approach 1:
The patent utilizes three-dimensional space efficiently by routing the first heat dissipation channel through the lamp shell and the second heat dissipation channel through the heat sink fins. This dimensional arrangement allows both channels to operate independently in different spatial dimensions, maximizing heat dissipation capability within a compact lamp volume.
3Reliability
If the power source is positioned closer to the LED module to reduce interference, then thermal management is improved, but heat conduction path length increases reducing efficiency
Solution Approach 1:
The thermal management system is segmented into two separate heat dissipation channels with independent air flow paths. The first channel handles power source heat through the lamp shell, while the second channel handles LED heat through the heat sink fins. This segmentation eliminates thermal interference between components while maintaining short heat conduction paths for each specific heat source.
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 significantly improves heat dissipation efficiency, reducing the risk of overheating and extending the lifespan of high-power LED lamps while maintaining compact dimensions and mechanical strength.
Implementation Method 1
heat sinks or their combination to dissipate heat of an LED lamp by thermal conduction, convection and/or radiation
Implementation Method 2
heat sinks or their combination to dissipate heat of an LED lamp by thermal conduction, convection and/or radiation
Implementation Method 3
heat sinks or their combination to dissipate heat of an LED lamp by thermal conduction, convection and/or radiation
Implementation Method 4
enhancing natural convection and radiation
Data Source
AI summary
An LED lamp includes: a lamp shell; a passive heat dissipating element having a heat sink, and the heat sink including fins and a base and connecting to the lamp shell; a power source disposed in the lamp shell; and a light board connecting to the heat sink and including LED chips electrically connected to the power source. A chamber of the lamp shell is formed with a first heat dissipating channel. The first heat dissipating channel has a first air inlet at an end of the lamp shell. Another end of the lamp shell has a heat dissipating hole. A second heat dissipating channel is formed in the fins and base. The second heat dissipating channel has a second air inlet. Air flows into the second air inlet, passes through the second heat dissipating channel and flow out from spaces between every adjacent two of the fins.