Shape Memory Baffle for Hot Air Backflow in Laptops
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Solution Overview
Problem
Conventional notebook computers experience rising surface and system temperatures due to hot air backflow through air outlets, affecting user comfort and device performance.
Innovation Solution
A baffle structure made of shape memory material, such as titanium-nickel alloy, is used to selectively close an air duct between the screen and case of an electronic device, preventing hot air from flowing back by changing shape in response to temperature changes, thereby blocking air ducts during high-load states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If air outlets are covered by a screen, then the structural integrity is maintained, but hot air flows back into the main base causing temperature rise
Solution Approach 1:
The baffle structure is designed to be movable rather than fixed, allowing it to dynamically adjust its position based on operating conditions. The baffle can be positioned to block the air duct during high-load operations when hot air backflow occurs, and repositioned during low-load operations to maintain normal airflow, thus dynamically resolving the temperature issue without compromising structural integrity
Solution Approach 2:
The system changes the physical state or position of the baffle structure based on operating parameters (such as temperature or airflow conditions). By adjusting the baffle's position parameter in response to changing operational states, the system prevents hot air backflow during critical periods while maintaining normal airflow during low-load periods, thereby controlling temperature without permanently affecting structural integrity
2Use of energy by moving object
If hot air is allowed to flow through the air duct, then cooling efficiency is maintained, but hot air recirculates back into the main base
Solution Approach 1:
The baffle structure serves as an intermediary element inserted into the air duct between the air outlet and the main base. This intermediary component selectively blocks the recirculation path of hot air while allowing the primary cooling airflow to continue through the designated cooling channels, thus preventing hot air backflow without compromising cooling efficiency
Solution Approach 2:
The air duct system is segmented by the baffle structure into different flow paths. The baffle creates a separation between the main cooling airflow and the potential recirculation path, allowing cool air to reach components while blocking hot air from returning to the main base, thus resolving the harmful backflow effect while maintaining cooling efficiency
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 prevents hot air backflow, reducing surface and system temperatures and enhancing operating comfort and performance by only blocking air ducts during high-load conditions.
Implementation Method 1
A baffle structure made of shape memory material, such as titanium-nickel alloy, is used to selectively close an air duct between the screen and case of an electronic device, preventing hot air from flowing back by changing shape in response to temperature changes
Data Source
AI summary
An electronic device is provided. The electronic device includes a first body, a second body, and a baffle structure. The first body includes a first edge. The second body includes a second edge. The first edge is pivotally connected to the second edge, and an air outlet is provided on the second edge. An air duct is formed between the first edge and the second edge. The baffle structure is disposed in the air duct and located at a position corresponding to the air outlet. The baffle structure selectively closes the air duct according to a temperature of the air outlet, to avoid a rising temperature inside the electronic device due to hot air backflow.