Projector Heat Generating Device Cover Flow Path Design
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Solution Overview
Problem
Existing heat generating devices in projectors, such as those described in Japanese Patent Laid-Open No. 2017-219747, face inefficiencies in cooling the optical wheel due to the design of the wheel cover, which can lead to increased temperatures and insufficient air flow, affecting the cooling efficiency of the luminescent light emitting area.
Innovation Solution
A heat generating device with a cover system that includes a first cover with openings on either side and a second cover forming a flow path between these openings, where the height from the lower end of the first cover to the center of the first opening is greater than the height to the center of the second opening, enhancing air flow and cooling efficiency by creating a specific flow path for air circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical wheel device is covered tightly to enhance dustproofness, then dustproofness is improved, but the temperature of the heat generating portion increases and cooling efficiency deteriorates
Solution Approach 1:
The cover is divided into a first cover and a second cover with distinct functions. The first cover provides dustproof sealing, while the second cover creates airflow paths. This segmentation allows the device to maintain both dustproofness and cooling efficiency by assigning different functional zones to different cover parts.
Solution Approach 2:
The second cover acts as an intermediary structure between the sealed first cover and the external environment. It provides controlled airflow paths that allow air to circulate through the heat generating portion without compromising the dustproof seal of the first cover, thus mediating between sealing requirements and cooling needs.
2Temperature
If air flow is generated on the front side of the optical wheel to improve cooling, then cooling efficiency is improved, but the air flow is insufficient and temperature reduction is inadequate
Solution Approach 1:
The airflow path is extended from a single front-side approach to a multi-dimensional circulation system. Air enters through the first opening portion, flows through the luminescent light emitting area, and exits through the second opening portion, creating a three-dimensional airflow pattern that significantly improves cooling coverage and efficiency.
Solution Approach 2:
The airflow path is extracted and defined specifically through the second cover structure. By separating the airflow function from the dustproof sealing function, the design can optimize the airflow path independently to ensure sufficient air circulation through the heat generating portion.
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 improves the cooling efficiency of the heat generating portion by generating a flow of air that effectively circulates through the device, reducing temperature and noise, while maintaining the structural integrity and functionality of the projector's optical wheel.
Implementation Method 1
a second cover disposed on an outer side of the first cover and forming a flow path leading from the first opening portion to the second opening portion
Data Source
AI summary
A heat generating device includes a heat generating portion, a first cover configured to cover at least part of the heat generating portion and including a first opening portion formed on one side and a second opening portion formed on the other side lying opposite to the one side, and a second cover disposed on an outer side of the first cover and forming a flow path leading from the first opening portion to the second opening portion, and in the heat generating device, a height from a lower end of the first cover to an opening center of the first opening portion is greater than a height from the lower end of the first cover to an opening center of the second opening portion.