LED Bulb Boiling Enhancement Surface Heat Dissipation
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Solution Overview
Problem
Traditional LED bulbs face inefficiencies in heat dissipation, particularly when not oriented upright, due to inefficient convective flow of thermally conductive liquids, which limits their ability to handle higher power levels and maintain performance across various orientations.
Innovation Solution
The implementation of a boiling enhancement surface within the LED bulb, combined with a thermally conductive liquid, facilitates efficient heat transfer through evaporation and condensation cycles, ensuring effective cooling in all orientations and enabling the use of higher wattage bulbs with reduced size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional LED bulbs use thermally conductive liquid for heat dissipation, then heat transfer is improved in upright orientation, but heat dissipation efficiency deteriorates when the bulb is not positioned upright
Solution Approach 1:
The patent applies phase transition by introducing a boiling enhancement surface that enables the thermally conductive liquid to undergo phase change from liquid to vapor and back. This phase transition mechanism allows heat dissipation to occur efficiently regardless of the bulb's orientation, as the phase change process is not dependent on gravitational direction like natural convection is.
2Illumination intensity
If higher wattage LEDs are used to increase illumination, then light output is improved, but heat generation increases beyond the cooling capacity of conventional liquid-filled bulbs
Solution Approach 1:
The boiling enhancement surface enables the thermally conductive liquid to undergo phase change from liquid to vapor and back, providing a more efficient heat dissipation mechanism that can handle the higher heat generation from high-wattage LEDs without compromising illumination output.
3Volume of moving object
If the bulb size is reduced for compactness, then device dimensions are improved, but heat dissipation surface area is reduced
Solution Approach 1:
The phase transition mechanism concentrates heat dissipation at the boiling enhancement surface, allowing efficient heat removal from a compact volume. The phase change process provides high heat transfer coefficients that compensate for the reduced surface area available in a smaller bulb design.
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 allows for efficient heat dissipation from LEDs in various orientations, enabling the design of higher wattage bulbs with compact sizes and reduced costs, while also integrating data communication capabilities for monitoring and maintenance optimization.
Implementation Method 1
The liquid heated by the LEDs rises to the top of the bulb and falls as it cools. However, the liquid does not flow efficiently because the shear force between the liquid rising up and the liquid falling down slows the convective flow of the liquid.
Implementation Method 2
The implementation of a boiling enhancement surface within the LED bulb, combined with a thermally conductive liquid, facilitates efficient heat transfer through evaporation and condensation cycles
Implementation Method 3
The implementation of a boiling enhancement surface within the LED bulb, combined with a thermally conductive liquid, facilitates efficient heat transfer through evaporation and condensation cycles
Data Source
AI summary
A communication system includes a light source to generate light; a broadband light transmitter control electronics to modulate a light signal and provide broadband optical data transmission network using the light source; a broadband light receiver control electronics to demodulate a received light signal from the broadband optical data transmission network; and a wired network transceiver coupled to the light transmitter/receiver to receive and transmit data between the optical data transmission network and a wired circuit.