Internal Escape Hatch Pressure Regulation System
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Solution Overview
Problem
Existing aeroplanes face challenges in managing pressure differentials between cabins during sudden depressurization or overpressure, leading to potential damage to separating bulkheads and doors due to inadequate pressure regulation systems, especially in cases where space constraints limit the installation of sufficient pressure regulation systems.
Innovation Solution
An aeroplane equipped with an internal escape hatch that automatically opens to balance pressures between cabins when a pressure differential exceeds a certain value, utilizing a pressure regulation system with a movable stop and catch mechanism to trigger the hatch's opening, and an overpressure panel to manage overpressure scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pressure regulation systems are installed on separating bulkheads, then pressure balance between cabins is achieved, but cabin wall area is significantly occupied and may be insufficient in cases of abrupt depressurization
Solution Approach 1:
The invention merges the pressure regulation function with the escape hatch structure. The escape hatch is equipped with both an actuator for controlled opening and a pressure equalization system with a membrane and vent hole. This combination allows the escape hatch to serve dual purposes: emergency evacuation and pressure balance, thereby eliminating the need for separate pressure regulation systems on cabin walls and freeing up wall area while maintaining or enhancing pressure regulation capability.
Solution Approach 2:
The escape hatch is designed as a multi-functional component. It can be opened manually or automatically via an actuator for passenger evacuation, and simultaneously serves as a pressure regulation device through its membrane-based pressure equalization system. This universal design allows a single structure to perform multiple critical functions, addressing both safety evacuation and pressure management needs without requiring additional dedicated space on cabin walls.
2Strength
If pressure regulation systems are installed to handle abrupt depressurization, then bulkhead and door damage is prevented, but the systems occupy significant area and may be inadequate when space is limited
Solution Approach 1:
The pressure equalization function is integrated into the escape hatch assembly rather than being installed as a separate system on the bulkhead. The membrane mechanism with vent hole is incorporated within the hatch structure itself, allowing rapid pressure equalization during abrupt depressurization events without requiring additional bulkhead area. This integration ensures bulkhead integrity while eliminating the space occupation problem of traditional separate pressure regulation systems.
3Reliability
If existing pressure regulation systems are used, then pressure balance is maintained, but on-board mass increases and system complexity increases
Solution Approach 1:
The invention combines the pressure regulation mechanism with the escape hatch structure, eliminating the need for separate pressure regulation systems. The membrane-based pressure equalization system integrated into the hatch uses minimal additional materials compared to traditional bulkhead-mounted systems, thereby reducing overall on-board mass while maintaining reliable pressure balance capability.
Solution Approach 2:
By making the escape hatch multi-functional (evacuation + pressure regulation), the invention eliminates redundant systems. The same structural components serve dual purposes, reducing total material usage and on-board mass compared to configurations that require separate dedicated pressure regulation systems in addition to escape hatches.
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 internal escape hatch effectively re-establishes pressure balance between cabins, reducing the risk of damage to bulkheads and doors, and can be used alone or in conjunction with other pressure balancing means, while also reducing the on-board mass by potentially eliminating or enhancing existing pressure regulation systems.
Implementation Method 1
pressure regulating means capable of automatically triggering an opening of said internal escape hatch or a part of said internal escape hatch when a pressure differential on both sides of said internal escape hatch exceeds a determined value
Data Source
AI summary
An aeroplane includes an external skin and an internal bulkhead delimiting a cabin, and an escape opening passing through the external skin and the internal bulkhead. The escape opening is closed off by an external escape hatch disposed flush with the external skin. The aeroplane also includes an internal escape hatch that closes off the escape opening disposed flush with the internal bulkhead, and pressure regulating means capable of automatically triggering an opening of the internal escape hatch or a part of the internal escape hatch when a pressure differential on both sides of the internal escape hatch exceeds a determined value.