Rotary Cooling Device Fin Segmentation for Heat Dissipation
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Solution Overview
Problem
Existing rotary cooling devices for projectors, such as those with reflection-type color wheels, face inefficiencies in heat dissipation due to air accumulation and insufficient cooling of fins, leading to heat saturation and reduced wavelength conversion efficiency.
Innovation Solution
A rotary cooling device design featuring a base with fins extending from the rotation center to the outer circumference, divided by first and second grooves that enhance airflow and contact area, allowing for improved heat dissipation and reduced rotational resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fins are formed in a concentric shape, then the structure is simple to manufacture, but air diffusion is hindered and heat dissipation efficiency decreases
Solution Approach 1:
The fins are divided into multiple independent fin elements by forming grooves between them. This segmentation allows air to diffuse more effectively between the fin elements while maintaining the concentric shape's manufacturing simplicity. The grooves create channels for air flow, preventing heat accumulation without requiring complex fin geometries.
2Speed
If fins are formed in a radial or spiral shape, then air circulation speed increases, but heat accumulates in the fins and cooling efficiency decreases
Solution Approach 1:
By segmenting the fins into discrete fin elements with grooves between them, the invention enables air to flow through the grooves at high speed (matching radial/spiral performance) while the segmented structure prevents heat accumulation. Each fin element is independently cooled by air flowing through the adjacent grooves, eliminating the heat buildup problem of continuous radial/spiral fins.
Solution Approach 2:
The grooves are strategically positioned between fin elements to create localized cooling channels. This local quality enhancement ensures that air flow and heat dissipation are optimized at critical locations where heat accumulation would otherwise occur, without changing the overall concentric shape.
3Temperature
If the number of fins is increased to improve heat dissipation, then cooling efficiency improves, but rotational resistance increases
Solution Approach 1:
Segmenting fins into discrete fin elements reduces the total surface area slightly compared to continuous fins, but dramatically improves air flow through the grooves. This segmentation allows for effective heat dissipation with fewer fin elements, thereby reducing rotational resistance while maintaining cooling 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
The design increases cooling efficiency, prevents heat accumulation, and extends the lifespan of wavelength conversion and light source devices by effectively managing airflow and heat transfer.
Implementation Method 1
when the base is rotated by the rotating device, in a process in which a cooling gas circulates along the first grooves and is discharged to the outer region of the heat radiating section
Implementation Method 2
heat transmitted from the cooling target via the base
Implementation Method 3
diffusion of the air (hot air) by a centrifugal force
Data Source
AI summary
A rotary cooling device includes a rotating device, a base connected to a cooling target and configured to be rotated by the rotating device, and a heat radiating section disposed in the base and configured to radiate heat transmitted from the cooling target via the base. The heat radiating section includes a plurality of fins extending from a rotation center side of the base to an outer circumference side of the base and arrayed along a rotating direction of the base, a plurality of first grooves formed among the plurality of fins and communicating with an outer region of the heat radiating section when viewed along a rotation axis of the base, and a plurality of second grooves crossing at least one of the plurality of first grooves to divide the plurality of fins into a plurality of fin elements.