LED Lamp Heat Sink Fin Gaps for Passive Cooling
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Solution Overview
Problem
High-power LED lamps face significant challenges with heat dissipation, leading to reduced lighting efficiency and shortened lifespan due to ineffective management of waste heat.
Innovation Solution
The LED lamp design incorporates a heat sink with first and second fins, where the first fins are divided into two portions with a gap, and the second fins have a transition portion with a buffer and guide section, enhancing air flow and heat dissipation through specific channels and vents, optimizing the ratio of power to heat dissipating area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat sink with fins is used for heat dissipation, then heat dissipation efficiency is improved, but device complexity increases
Solution Approach 1:
The first fins are divided into two portions with a gap portion between them, segmenting the fin structure to enable air flow passage directly through the fins, thereby improving heat dissipation efficiency without requiring additional complex components
Solution Approach 2:
The heat sink structure serves multiple functions: the fins provide heat dissipation surface area, the gap portion in first fins creates air flow channels, and the transition portion with buffer and guide sections directs air flow. This multi-functionality reduces the need for separate components, simplifying the overall device structure while maintaining effective heat dissipation
2Temperature
If the heat dissipation area is increased, then heat dissipation efficiency is improved, but the size and weight of the heat sink increase
Solution Approach 1:
The gap portion in the first fins creates a three-dimensional air flow passage that allows air to move through the heat sink structure itself, utilizing the vertical and radial dimensions for heat dissipation. This enables effective cooling without proportionally increasing the horizontal footprint or weight of the heat sink
Solution Approach 2:
The transition portion with buffer section and guide section is strategically placed at specific locations where air flow needs to be directed. This localized structural feature optimizes air flow paths without requiring the entire heat sink structure to be enlarged, thereby maintaining compact size and weight while improving heat dissipation efficiency
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 effectively dissipates heat, improving the LED lamp's efficiency and extending its lifespan by optimizing heat transfer and air flow, while maintaining a compact and lightweight structure.
Implementation Method 1
a passive heat dissipating element having a heat sink connected to the lamp shell; and a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips
Implementation Method 2
the first fins are divided into two portions in a radial direction of the LED lamp, the two portions are divided with a gap portion, at least one of the second fins includes a third portion and two fourth portions
Data Source
AI summary
An LED lamp includes: a lamp shell; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source disposed in the lamp shell; and a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; wherein the heat sink comprises first fins and second fins, each of the first fins is divided into two portions in a radial direction of the LED lamp, the two portions are divided with a gap portion, at least one of the second fins includes a third portion and two fourth portions, the third portion is connected to the fourth portion through a transition portion, the transition portion has a buffer section and a guide section, a direction of any tangent of the guide section is separate from the gap portion.