LED Lighting Device with Partitioned Airflow Heat Sink
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Solution Overview
Problem
LED lighting devices face reduced lifespan and degraded illuminance due to heat accumulation, as existing solutions fail to efficiently manage heat dissipation.
Innovation Solution
The proposed lighting device incorporates a heat sink with radiating fins, a heat radiating fan, and a housing with separate air inlet and outlet ports, allowing for effective air circulation and heat exchange, ensuring efficient heat dissipation through the use of a partition to prevent recirculation of heated air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat sink is used to dissipate heat from the LED, then heat dissipation is improved, but heat accumulation still occurs reducing LED lifespan and illuminance
Solution Approach 1:
The patent applies pneumatic principles by introducing a fan to create forced air convection. The fan drives air flow through the heat sink fins, creating a controlled pneumatic system that enhances heat dissipation. Air is drawn in through inlet holes, forced through the heat exchange paths between the heat sink and fan, and expelled through outlet holes, creating a continuous pneumatic cycle that efficiently removes heat from the LED.
Solution Approach 2:
The patent transitions from passive two-dimensional heat dissipation through heat sink surfaces to three-dimensional forced convection. By adding the fan component, the system creates volumetric air flow patterns that engage the entire heat sink structure, including internal fin spaces, transforming the heat dissipation approach from surface-level to volumetric cooling in multiple spatial dimensions.
2Temperature
If heat dissipation structures are added to the LED device, then temperature control is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into integrated components. The housing structure combines structural support with thermal management functions by incorporating heat dissipation fins and air flow channels directly into the housing walls. The fan assembly is integrated with the heat sink structure, creating a unified thermal management system that reduces overall device complexity while maintaining effective temperature control.
Solution Approach 2:
The housing structure serves multiple functions simultaneously: it provides mechanical support for the LED and electronics, acts as a heat sink with integrated fins for thermal dissipation, and functions as an air flow channel system for convection cooling. This multi-functionality reduces the need for separate dedicated components, thereby managing device complexity while achieving effective temperature control.
3Temperature
If air circulation is introduced to enhance heat dissipation, then temperature reduction is improved, but energy consumption increases
Solution Approach 1:
The patent optimizes the pneumatic parameters of the system by carefully designing fan specifications, air flow rates, and pressure differentials. The fan is selected to operate at energy-efficient parameters that achieve sufficient air flow for heat dissipation without excessive power consumption. The air flow velocity and pressure are tuned to maximize heat transfer efficiency while minimizing the energy required to drive the convection current.
Solution Approach 2:
The heat sink structure features locally optimized fin distributions and air flow paths that enhance heat transfer efficiency in high-heat-density regions. The housing includes strategically positioned inlet and outlet holes that create effective air flow patterns targeted at the hottest areas of the LED assembly, ensuring that energy input from the fan is concentrated where it provides maximum thermal management benefit.
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 configuration significantly improves heat dissipation efficiency, reducing LED temperature and extending its lifespan while maintaining illuminance quality.
Implementation Method 1
a heat radiating fan disposed on the heat sink... By the operation of the heat radiating fan, air having a first temperature is introduced into the first hole and air having a second temperature is emitted to the second hole
Implementation Method 2
a heat sink disposed on the light emitting module... a heat radiating fan which is disposed on the heat sink and inhales air and emits to the heat sink
Implementation Method 3
air having a first temperature is introduced into the first hole and air having a second temperature is emitted to the second hole... The second temperature is higher than the first temperature
Data Source
AI summary
A lighting device may be provided that includes: a light emitting module; a heat sink disposed on the light emitting module; a heat radiating fan disposed on the heat sink; and a housing which receives the light emitting module, the heat sink and the heat radiating fan, and includes an air inlet port and an air outlet port which are separated from each other, and includes a partition separating the air inlet port from the air outlet port, wherein the air inlet port is connected to a space between the heat radiating fan and the housing, and wherein the air outlet port is connected to a space between the heat sink and the heat radiating fan.