Electronic Device Exhaust Door Fire Containment Mechanism
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Solution Overview
Problem
Conventional electronic devices face challenges in maintaining effective cooling and preventing fire spread due to the obstruction caused by punched metal screens at exhaust openings, which degrade air flow and increase the difficulty of extinguishing fires, while also being costly and hard to obtain.
Innovation Solution
An electronic device with a door part that automatically closes the exhaust opening when a predetermined temperature is reached, utilizing wind pressure and gravity to ensure fire containment and improved cooling by maintaining airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a punched metal screen is provided at the exhaust opening to prevent fire spread, then fire containment is improved, but air flow is obstructed and cooling efficiency degrades
Solution Approach 1:
The patent applies a door part that can dynamically open and close the exhaust opening based on temperature conditions. The door part is held open by a temperature fuse during normal operation to maintain air flow for cooling, and automatically closes when fire is detected to prevent fire spread. This dynamic behavior resolves the contradiction by adapting the exhaust opening state to current operational needs.
Solution Approach 2:
The patent changes the physical state of the exhaust opening from a fixed closed state (punched metal screen) to a dynamic state that can open or close based on temperature parameters. The temperature fuse monitors temperature and triggers door part closure only when necessary, allowing the system to optimize between air flow and fire containment based on real-time temperature conditions.
2Reliability
If a punched metal screen is provided at the exhaust opening to prevent fire spread, then fire containment is improved, but the cost and complexity of the device increases
Solution Approach 1:
The patent segments the exhaust opening closure function into separate components: a door part for physical closure, a temperature fuse for temperature sensing and actuation, and a hinge for rotation. This segmentation allows each component to perform its specific function independently, simplifying the overall design compared to a monolithic punched metal screen while maintaining fire containment capability.
Solution Approach 2:
The door part is designed to automatically close the exhaust opening when the temperature fuse detects fire conditions, eliminating the need for external control systems or complex mechanisms. The temperature fuse directly triggers the door part closure through thermal expansion or melting, providing self-service fire response without additional complexity.
3Reliability
If air flow is obstructed by a punched metal screen, then fire containment is improved, but high temperature air and unburned flammable gas fill the inside making fire extinguishing difficult
Solution Approach 1:
The door part dynamically adjusts the exhaust opening state based on fire conditions. During normal operation, the opening remains open to allow air flow that prevents flammable gas accumulation. When fire is detected, the door closes to contain the fire, preventing harmful gases from filling the device interior. This dynamic response addresses the harmful effects by timing the closure to occur only when necessary.
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
Enhances cooling efficiency and prevents fire spread by ensuring airflow while effectively extinguishing fires within the device, reducing the need for costly foaming coating materials.
Implementation Method 1
the door part is rotated based on the own weight of the door part and a wind pressure of the air taken in the electronic device and exhausted outside the electronic device
Implementation Method 2
a wind pressure of the air taken in the electronic device and exhausted outside the electronic device
Implementation Method 3
a heat sensing member that is operated when a predetermined part inside the electronic device reaches a predetermined temperature
Data Source
AI summary
An electronic device having an exhaust opening configured to exhaust air outside, the electronic device includes a door part configured to close the exhaust opening when the electronic device has a predetermined temperature, wherein the door part is rotated based on the own weight of the door part and a wind pressure of the air taken in the electronic device and exhausted outside the electronic device, so that the exhaust opening is closed.