Explosion-Proof Vent Structure for Arc-Discharge Pressure Relief
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Solution Overview
Problem
In electronic devices, there is a challenge to prevent the ejection of gas or scattering of components due to increased internal pressure caused by arc discharge, which can lead to high-pressure gas escaping or internal components being scattered outside through ventilation ports.
Innovation Solution
An explosion-proof structure is designed with a housing, a cover member that covers a ventilation port, and opening/closing members that rotate to manage pressure, ensuring that gas or components do not escape by maintaining a balanced opening and closing mechanism of ventilation ports, using a combination of shielding, support, and rotation restricting members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ventilation ports are provided on the housing to allow air flow, then cooling efficiency is improved, but high-pressure gas can escape to the outside during arc discharge
Solution Approach 1:
The ventilation system is divided into multiple independent opening/closing members (first, second, third opening/closing members) that can operate autonomously. Each member is positioned at different locations (front surface, rear surface, side surface) and responds to pressure changes independently, allowing selective closure based on local pressure conditions while maintaining ventilation at other ports.
Solution Approach 2:
The opening/closing members are designed to dynamically change their state between open and closed positions based on internal pressure conditions. During normal operation, they remain open to allow ventilation. During arc discharge when pressure increases, they automatically close to prevent gas ejection, providing adaptive response to changing conditions.
2Object-affected harmful factors
If opening/closing members are added to control ventilation ports, then gas ejection is prevented, but device complexity increases
Solution Approach 1:
The opening/closing members are designed to automatically respond to pressure changes without external control systems. The members utilize the pressure differential itself as the actuating force - when internal pressure exceeds external pressure during arc discharge, the pressure force directly drives the members to close, eliminating the need for sensors, actuators, or control circuits.
Solution Approach 2:
Multiple functions are combined into the opening/closing members: they serve as both ventilation openings and safety closure mechanisms, and also function as pressure indicators. The members integrate the ventilation function with the arc discharge protection function, reducing the need for separate safety devices.
3Object-affected harmful factors
If multiple opening/closing members are positioned at different surfaces, then gas ejection is suppressed from all directions, but manufacturing complexity increases
Solution Approach 1:
All opening/closing members are designed with the same basic structure and operational principle, allowing them to be manufactured using identical or similar processes. Each member serves multiple purposes: ventilation during normal operation, automatic closure during arc discharge, and pressure indication, simplifying the overall design while providing comprehensive protection.
Data Source
AI summary
An explosion-proof structure having a housing that houses an electronic device, a cover member that covers a first ventilation port formed on one surface of the housing at least in a normal direction to the one surface, an opening/closing member that opens and closes a second ventilation port formed between the one surface and the cover member, and a rotation support portion provided at a peripheral portion of the first ventilation port and that supports the opening/closing member, the opening/closing member rotating around the rotation support portion, using the rotation support portion as a center of rotation.