Color Wheel Dust Prevention Module with Sealed Air Channels
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Solution Overview
Problem
Conventional light source modules with open housings for color wheels suffer from dust accumulation, which absorbs excitation light and reduces the efficiency and lifespan of the color wheel and the entire light source system, especially in dirty environments.
Innovation Solution
A dust prevention and heat dissipation module that seals the color wheel within a housing with air channels and filtering devices at the inlet and outlet, using a fan to circulate air and prevent dust entry while maintaining heat dissipation, employing a two-stage filtering system for enhanced dust filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the color wheel housing is open to increase heat exchange with ambient air, then heat dissipation efficiency is improved, but dust accumulates on the color wheel surface reducing its efficiency and lifespan
Solution Approach 1:
A filtering device is introduced as an intermediary between the ambient air and the color wheel. The filter allows air to pass through for heat dissipation while blocking dust particles, thus mediating between the conflicting requirements of heat exchange and dust prevention
Solution Approach 2:
The air channel is segmented into multiple pathways: a leading-in air channel for clean air intake, a leading-out air channel for exhaust, and air channels blocked by the filtering device. This segmentation allows different regions of the housing to serve different functions (heat dissipation vs. dust prevention) simultaneously
2Object-affected harmful factors
If the color wheel is sealed in a housing to prevent dust entry, then dust accumulation is reduced, but heat dissipation efficiency decreases
Solution Approach 1:
The filtering device acts as a flexible barrier (similar to thin film concept) that allows thermal energy to pass through while blocking solid dust particles. The filter material enables heat transfer via conduction and convection while physically preventing dust accumulation on the color wheel surface
Solution Approach 2:
A fan is introduced to create controlled air flow through the sealed housing. The fan forces air through the filtering device and color wheel housing, maintaining positive pressure inside to prevent dust ingress while ensuring continuous air circulation for effective heat dissipation
3Object-affected harmful factors
If a filtering device is added to the air channel to block dust, then dust prevention is improved, but device complexity increases
Solution Approach 1:
The filtering device is designed to perform multiple functions: dust filtration, air flow guidance, and structural support for the air channel. By integrating these functions into a single component, the overall device complexity is minimized while achieving effective dust prevention
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 solution effectively reduces dust on the color wheel surface, improving its efficiency and lifespan, and consequently extending the life of the light source module by ensuring clean air circulation and efficient heat dissipation.
Implementation Method 1
a fan which pumps the air in via the leading-in air channel and out via the leading-out air channel
Implementation Method 2
a filtering device provided at an inlet of the leading-in air channel and at an outlet of the leading-out air channel
Implementation Method 3
a wavelength conversion material on the color wheel converts the excitation light to a converted light for output
Implementation Method 4
the housing 02 is open, to increase the heat exchange between the color wheel 01 and the ambient air, to achieve heat dissipation
Data Source
Figure 1~2
Figure 3~5
AI summary
Disclosed is a dust prevention and heat dissipation module and a light source system of a color wheel; said color wheel (21) is sealed in a color wheel housing (22), which color wheel housing (22) has an air inlet and an air outlet; and the dust prevention and heat dissipation module comprises a leading-in air channel (11) in communication with the air inlet of the color wheel housing (22), a leading-out air channel (12) in communication with the air outlet of the color wheel housing (22), a filtering device (13) provided at an air inlet of the leading-in air channel and an air outlet of the leading-out air channel, and a fan (14) which leads the air in via the leading-in air channel (11) and leads the air out of the leading-out air channel (12). The air in the leading-in and leading-out air channels flows by means of the fan to realize the heat dissipation of the color wheel, and the filtering device filters the air flowing through the color wheel housing, thereby reducing the amount of dust adhered to the surface of the color wheel, so as to improve the luminous efficiency of the light source system and prolong the service life of the light source system.