Convective Accelerator Flue for LED Heat Dissipation
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Solution Overview
Problem
LED light lamps face challenges in heat dissipation and luminous distribution due to the structure of fins, which complicates design and increases costs, and existing solutions like metal columns are costly and inefficient.
Innovation Solution
The use of a convective accelerator with a flue and openings within the bulb shell enhances heat convection by creating a stack effect, allowing for efficient heat dissipation and improved luminous distribution similar to incandescent bulbs, without the need for costly heat sinks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a structure of fins is used as a heat sink, then heat dissipation is improved, but device complexity increases and design is complicated
Solution Approach 1:
The patent extracts the heat dissipation function from the complex fin structure and implements it through a simplified metal column that extends from the base toward the center of the bulb. This single structural element serves both as a heat conduction path and as an elevation mechanism for the LEDs, eliminating the need for separate fin structures while maintaining effective heat dissipation.
Solution Approach 2:
The metal column performs multiple functions simultaneously: it acts as a heat sink to conduct heat away from the LEDs, serves as a structural support to elevate the LEDs for omnidirectional light distribution, and provides a mounting surface for the LED components. This multi-functionality reduces overall device complexity while achieving the desired heat dissipation performance.
2Temperature
If a metal column is used to extend from the base toward the center of the bulb, then heat dissipation and omnidirectional light pattern are achieved, but product cost increases
Solution Approach 1:
The patent combines the heat dissipation function with the LED mounting structure by integrating the LEDs directly onto the metal column. This merging of functions eliminates the need for separate heat sink components and reduces assembly steps, thereby lowering manufacturing costs while maintaining effective heat dissipation and omnidirectional light distribution.
3Illumination intensity
If LEDs are mounted on a metal column, then omnidirectional light distribution is improved, but manufacturing cost increases due to component cost and assembling process
Solution Approach 1:
The metal column's central positioning and vertical orientation automatically provide omnidirectional light distribution when LEDs are mounted on its lateral surface. The structure itself serves the lighting distribution function without requiring additional optical components or complex positioning mechanisms, thereby reducing both component costs and assembly complexity while achieving superior luminous distribution.
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 solution effectively carries heat away from the LED filament, prolonging the lifespan and enhancing luminous distribution, making it comparable to incandescent bulbs while reducing costs by eliminating the need for conventional heat sinks.
Implementation Method 1
the flue allows a convection flow of the filling gas to pass into one of the first and second openings
Implementation Method 2
LED light lamps using stack effect for improving heat dissipation
Data Source
AI summary
A light-emitting lamp has a bulb shell, a convective accelerator, a light-emitting filament and a bulb base. The bulb shell defines an interior volume filled with a filling gas, and comprises a first transparent material. The convective accelerator is disposed within the interior volume, and comprises a second transparent material. The convective accelerator contains a flue with first and second openings. The light-emitting filament is disposed within the flue, comprising a plurality of semiconductor light-emitting elements. When the light-emitting filament emits light to generate heat, the flue allows a convection flow of the filling gas to pass into one of the first and second openings. The bulb base supports the bulb shell and the light-emitting filament, and has electrical conductors in electrical communication with the light-emitting filament. The first and the second openings have different distances apart from the bulb base.