Projector Vent Layout With Slidable Dust Cover and Lens Heat Shield
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Solution Overview
Problem
Conventional projectors face issues with dust accumulation due to air intake, which affects image quality and brightness, and heat dissipation designs that omit dust-proof measures can lead to lens deformation from heat accumulation.
Innovation Solution
A projection device with a slidable cover to cover air inlets and outlets, combined with a novel component configuration that separates heat-generating elements from the airflow path and uses a heat shield to prevent heat transfer, along with dust-proof baffles and heat dissipation fins to enhance cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air inlet and air outlet are arranged on the casing for heat dissipation, then heat dissipation effect is improved, but dust accumulation inside the casing worsens
Solution Approach 1:
The patent employs a slidable cover that can dynamically switch between open and closed states. When the projector is not in use, the cover closes to block dust entry while maintaining airflow channels. When the projector operates, the cover opens to allow dust-free air intake for heat dissipation. This dynamic mechanism resolves the contradiction between continuous dust protection and operational heat dissipation needs.
Solution Approach 2:
The air inlet and air outlet are segmented into multiple independent channels distributed across the casing surface. This segmentation allows selective opening and closing of specific regions, enabling the system to maintain dust protection in certain areas while preserving heat dissipation pathways in other areas, thus resolving the contradiction between dust prevention and thermal management.
2Reliability
If dust-proof measures are implemented to prevent dust accumulation, then image quality is maintained, but heat dissipation capability worsens
Solution Approach 1:
The slidable cover dynamically transitions between protective and ventilative states. During non-operational periods, it provides dust-proof protection to maintain image quality. During operational periods, it opens to enable effective heat dissipation, preventing lens deformation. This temporal separation of functions resolves the contradiction between dust protection and heat dissipation capability.
Solution Approach 2:
The slidable cover acts as an intermediary element that mediates between the dust-proof requirement and heat dissipation requirement. It selectively blocks or opens airflow paths, serving as a controllable barrier that adapts to different operational states, thus resolving the contradiction between maintaining image quality and ensuring heat dissipation capability.
3Loss of energy
If the projector uses active cooling designs with fans and air outlets, then thermal energy is dissipated, but dust enters through the same outlets
Solution Approach 1:
The slidable cover provides dynamic control over the air outlet openings. When closed, it prevents dust entry while allowing thermal energy dissipation through the cover material itself. When open, it enables enhanced airflow for thermal management. This dynamic control resolves the contradiction between effective thermal energy dissipation and prevention of dust entry.
Solution Approach 2:
The slidable cover functions as a flexible barrier that can be positioned to block dust entry while permitting thermal energy dissipation. The cover material and its positioning enable selective permeability to dust particles versus thermal energy, resolving the contradiction between thermal management and dust protection.
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 prevents dust accumulation while improving heat dissipation, maintaining image quality and preventing lens deformation, thus ensuring optimal performance and aesthetics.
Implementation Method 1
a fan, and a projection lens. The light source module, the light source thermal module, the fan, and the projection lens are disposed in the casing
Implementation Method 2
the light source thermal module is connected to the light source module and disposed adjacent to the second side wall
Implementation Method 3
the orthographic projection range of the air outlet onto the first side wall overlaps with orthographic projection range of the light source thermal module onto the first side wall
Data Source
AI summary
A projection device of the present invention includes a casing, a light source module, a light source thermal module, a fan, and a projection lens; wherein the light source module, the light source thermal module, the fan and the projection lens are disposed in the casing, and the casing has a first side wall, a second side wall, and a bottom plate, wherein the first side wall includes a first air inlet, and the second side wall includes an air outlet; the orthographic projection range of the air outlet on the first side wall overlaps with the orthographic projection range of the light source thermal module on the first side wall, and the orthographic projection range of the projection lens on the first side wall does not overlap with the orthographic projection range of the light source thermal module on the first side wall.