Image Projection Apparatus Duct System for Thermal Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image projection apparatuses experience large fluctuations in temperature distribution of exhaust air, leading to inefficient cooling and potential thermal deterioration of components, particularly the exhaust fan's bearing, which shortens its lifespan.
Innovation Solution
The apparatus employs a light source cooling mechanism with a double suction sirocco fan and a light source exhaust duct system where the first air, cooled by the light source, is dispersed through multiple ducts with varying flow path lengths and sectional areas, ensuring thorough mixing with lower-temperature second air before discharge, thereby reducing temperature fluctuations and preventing hot spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high-temperature first air that has cooled the light source is discharged directly, then cooling efficiency is improved, but temperature distribution of exhaust air fluctuates greatly causing thermal deterioration of exhaust fan bearing
Solution Approach 1:
The exhaust air flow is segmented into multiple ducts (first duct and multiple second ducts) with different flow path lengths and sectional areas. The first duct has a longer flow path and larger sectional area, while the second ducts have shorter flow paths and smaller sectional areas, allowing differential cooling and temperature distribution control
Solution Approach 2:
Different regions of the exhaust air are given different cooling characteristics. Air flowing through the first duct receives different treatment compared to air flowing through the second ducts, creating localized quality differences in temperature and flow characteristics to achieve uniform overall temperature distribution
2Temperature
If multiple ducts with varying flow path lengths are used to disperse first air, then temperature distribution is stabilized, but device complexity increases
Solution Approach 1:
Multiple second ducts are arranged side by side and merged into a common exhaust structure, allowing parallel flow paths to be combined efficiently. This merging approach achieves temperature stabilization through multiple pathways while minimizing the increase in overall device complexity
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 effectively stabilizes the temperature distribution of exhaust air, prolongs the exhaust fan's lifespan by preventing thermal deterioration, and maintains efficient cooling of the light source and other heat-generating components.
Implementation Method 1
a cooling fan is used to blow air into the reflector to cool the light emitting unit with the air
Implementation Method 2
the first air, cooled the light source
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3B
AI summary
An image projection apparatus includes: an exhaust fan (7) configured to discharge air in the apparatus to outside of the apparatus; a light source (160); and a plurality of ducts (82a to 82d) each having an air intake port facing the light source, and arranged side by side in a rotation axis direction of the exhaust fan (7). A duct closer to the exhaust fan (7) in a rotation axis direction of the exhaust fan (7), has a larger flow path sectional area and has an outflow port from which air flows out, placed closer to the light source (160), in a direction perpendicular to the rotation axis direction of the exhaust fan (7).