Projector Light Source Cooling via Gravity-Actuated Flow Guide
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Projectors using high-pressure mercury lamps face reduced lamp life due to inadequate cooling when switching between horizontal, vertical, and portrait installations, leading to poor cooling effects and uneven heat distribution.
Innovation Solution
A projector design incorporating a light source module with a fan and a flow guide device featuring two air channels and gravity-actuated airflow control assemblies, allowing the cooling airflow to be directed effectively to the light source in various installation orientations by controlling the air channels' communication states, ensuring consistent cooling across different usage states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector uses a single cooling channel design, then the structure is simple, but the cooling effect is insufficient when switching between different installation orientations
Solution Approach 1:
The cooling structure is divided into multiple independent air channels (first air channel and second air channel), each capable of being independently controlled to communicate or not communicate with the light source. This segmentation allows the system to adapt to different installation orientations by selectively activating appropriate channels, resolving the contradiction between cooling adaptability and structural complexity.
Solution Approach 2:
The air channels are designed with movable airflow control assemblies that can dynamically switch between communication and non-communication states based on the projector's installation orientation. This dynamic capability enables the cooling system to adapt to horizontal, vertical, and portrait installations, achieving high adaptability without requiring a completely different structure for each orientation.
2Adaptability or versatility
If the airflow control assembly is positioned horizontally, then it works for horizontal installation, but fails to provide effective cooling in vertical or portrait installations
Solution Approach 1:
The airflow control assembly is designed with an asymmetric structure where the baffle plate is inclined relative to the horizontal direction at a specific angle (e.g., 30-60 degrees). This asymmetric design allows the gravity-actuated baffle to effectively block or allow airflow in multiple orientations, enabling the single assembly to provide reliable cooling across horizontal, vertical, and portrait installations without requiring separate assemblies for each orientation.
3Reliability
If the baffle plate is horizontal, then it blocks airflow effectively in horizontal installation, but cannot block airflow in vertical or portrait installations
Solution Approach 1:
The baffle plate is designed to be movable rather than fixed, allowing it to dynamically change its blocking capability based on the projector's installation orientation. When the projector is in horizontal installation, the baffle plate is horizontal to block airflow; when switched to vertical or portrait installation, the baffle plate rotates to become vertical or inclined, maintaining effective airflow control. This dynamic adjustment ensures both reliable airflow control and adaptability across multiple orientations.
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 provides a qualified cooling effect in various projector states, extending the usage life of the light source by ensuring efficient heat dissipation regardless of the installation orientation.
Implementation Method 1
the first airflow control assembly is adapted to control the first air channel to be in a non-communication state when the projector is in horizontal installation mode
Implementation Method 2
When the first air channel is in the communication state, the cooling airflow flows from the fan to the light source via the first air channel
Data Source
AI summary
A light source module of a projector includes a light source having a lamp axis, a fan for providing a cooling airflow, and a flow guide device disposed between the light source and the fan and for guiding the cooling airflow. The flow guide device includes a first air channel connected between a side of the light source and an air outlet of the fan, a second air channel connected between another side of the light source and the air outlet of the fan, and a first airflow control assembly disposed in the first air channel and for controlling the first air channel either in communication or non-communication states via gravity. The first airflow control assembly has a first control rotating shaft inclined relative to the lamp axis and a first included angle between the first control rotating shaft and the lamp axis is less than 90 degrees.