LED Lighting Device Thermal Dissipation via Spiral Coil Radiator
Solution Overview
Problem
High-power LED lighting devices face challenges in thermal dissipation, leading to reduced luminous efficiency and shortened lifespan due to inadequate heat management, particularly when weight and weight distribution limitations are imposed.
Innovation Solution
The design of an LED lighting device with a specific configuration that includes a lamp cap, a case with a power supply, and a heat exchange unit connected to a light emission unit, where the weight distribution and length proportions are optimized to ensure effective thermal dissipation while maintaining structural integrity and luminous flux, with the moment of the lamp cap controlled within specific limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-power LEDs are used to increase luminous flux, then luminous output is improved, but thermal dissipation becomes insufficient leading to reduced lifespan
Solution Approach 1:
The patent transitions from traditional horizontal or simple vertical radiator structures to a three-dimensional spiral coil radiator structure. This spatial transformation allows the radiator to wrap around the LED light source in multiple dimensions, significantly increasing the heat dissipation surface area without proportionally increasing the device's external dimensions, thereby effectively managing thermal dissipation for high-power LEDs
Solution Approach 2:
The patent optimizes the radiator's structural parameters including the spiral coil's wire diameter, pitch, and overall dimensions to maximize heat dissipation efficiency. By adjusting these parameters, the radiator achieves optimal thermal performance while maintaining compatibility with the LED package and fitting within the constrained device space
2Temperature
If radiator size is increased to improve thermal dissipation, then heat management is improved, but weight and weight distribution limitations are exceeded
Solution Approach 1:
The spiral coil configuration utilizes three-dimensional space efficiently, creating a compact radiator structure that achieves high surface area-to-volume ratio. This allows effective heat dissipation without requiring a large, heavy conventional radiator structure
Solution Approach 2:
The patent employs aluminum alloy materials for the radiator construction, which provide high thermal conductivity combined with relatively low density. This composite material selection optimizes the balance between thermal dissipation performance and weight constraints
3Strength
If weight distribution is optimized to reduce lamp cap moment, then structural integrity is improved, but radiator design freedom is constrained
Solution Approach 1:
The spiral coil radiator structure naturally distributes weight along its coiled path, creating a balanced weight distribution pattern that reduces the moment on the lamp cap while maintaining design flexibility for various LED configurations and power levels
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
The optimized design enhances thermal dissipation, prolongs the lifespan of high-power LEDs, and maintains high luminous flux while adhering to weight and structural constraints, ensuring efficient heat management and prolonged device life.
Implementation Method 1
a third portion, connected with the second portion, comprising a heat exchange unit and a light emission unit connected with each other
Implementation Method 2
the heat exchange unit...ensures effective thermal dissipation
Data Source
AI summary
An LED lighting device, comprises a first portion, comprising a lamp cap; a second portion, connected with the first portion, comprising a case and a power supply, and the power supply is disposed in the case; and a third portion, connected with the second portion, comprising a heat exchange unit and a light emission unit connected with each other, and the light emission unit and the power supply are electrically connected. A distance b from a junction face of the first portion and the second portion to a plane where a center of gravity of the LED lighting device is located satisfies:(L2+L3)/5<b<3(L2+L3)/7,wherein L2 is a length of the second portion, L3 is a length of the third portion, and both the junction face and the plane are parallel and perpendicular to a first direction.