Distribution Board Ventilation with Mutually Exclusive Doors
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Solution Overview
Problem
Distribution boards face the challenge of balancing arc gas discharge and ventilation functions, where doors need to be closed during steady states for safety and opened for internal ventilation, while also needing to rapidly discharge high-temperature arc gases during faults.
Innovation Solution
A distribution board ventilation system with a circulation chamber and mutually exclusive discharge doors, where the linking mechanism ensures that only one door is open for air circulation in normal conditions and both doors are closed during arc events, allowing effective arc gas discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discharge doors are kept closed during steady state, then safety against arc accidents is improved, but ventilation function deteriorates
Solution Approach 1:
The discharge doors are designed to be dynamically controllable, switching between closed state during steady operation to ensure safety, and open state during arc accidents to enable rapid gas discharge. The control system dynamically adjusts door positions based on operational conditions, resolving the contradiction between safety and ventilation requirements.
2Ease of operation
If discharge doors are opened for ventilation, then air circulation is improved, but arc gas discharge capability deteriorates
Solution Approach 1:
The system dynamically controls discharge door positions based on operational mode. During normal ventilation, doors are opened to allow air circulation. During arc accidents, doors rapidly close to redirect the arc gas discharge path through dedicated arc discharge ports, ensuring that ventilation and arc gas discharge functions do not interfere with each other.
3Reliability
If multiple discharge doors are provided for different compartments, then arc gas discharge from any compartment is improved, but device complexity increases
Solution Approach 1:
The discharge doors are designed with multi-functionality to reduce overall system complexity. Each discharge door serves dual purposes: acting as a ventilation opening during normal operation and as an arc gas discharge barrier when needed. The linking mechanism further enhances this by enabling coordinated operation of multiple doors, allowing them to function as an integrated system rather than independent components.
Solution Approach 2:
The invention merges the ventilation and arc protection functions into a single integrated door system. By combining multiple discharge doors with a linking mechanism, the system achieves coordinated control where doors work together as a unified structure, reducing the need for separate independent control systems for each door and thereby reducing overall device complexity.
4Reliability
If discharge doors are linked to ensure mutual exclusivity, then arc gas discharge path control is improved, but mechanism complexity increases
Solution Approach 1:
The linking mechanism acts as an intermediary component that coordinates the operation of multiple discharge doors. Rather than requiring complex independent control systems for each door, the linking mechanism provides a simple mechanical or electrical interface that ensures mutual exclusivity - when one door is open, others remain closed. This intermediary structure simplifies the overall control architecture while maintaining reliable arc gas discharge path control.
Data Source
AI summary
The present disclosure relates to a distribution board ventilation system including a circulation chamber serving as a passage for air circulation and arc discharge; a first compartment provided at one surface of the circulation chamber; a second compartment which is adjacent to the first compartment and provided at the other surface adjacent to the one surface of the circulation chamber; a first discharge door mounted on the one surface of the circulation chamber to open the first compartment; a second discharge door mounted on the other surface of the circulation chamber to open the second compartment; and a linking means which is mounted between the first discharge door and the second discharge door and ensures that the open states of the first discharge door and the second discharge door are mutually exclusive.