Cabin Isolation Assemblies With Negative-Pressure Airlocks

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Solution Overview

Problem

There is a need for improved systems and methods to reduce cross-contamination between passengers in common areas such as cabin seating areas, especially during flights, to prevent the spread of viruses like COVID-19.

Innovation Solution

The implementation of an isolation section assembly with a section housing, airlock enclosures, and an air recirculation system that includes UV illumination and environmental conditioners to disinfect and maintain negative pressure, coupled to existing aircraft monument connection points.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If passengers use common-carrier cabins for travel, then transportation efficiency and social interaction are improved, but cross-contamination of viruses between passengers occurs

Engineering Contradiction:

Improvetransportation efficiencyVSAvoidcross-contamination risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The cabin is divided into isolated compartments with individual doors, separating passengers into independent spaces. Each compartment can be independently pressurized and ventilated, preventing virus transmission while maintaining overall cabin functionality and passenger transport efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Airlock enclosures serve as intermediary spaces between the isolated compartment and the main cabin. These airlocks allow controlled air exchange and passenger movement while maintaining pressure differentials and preventing direct contamination pathways between compartments.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If isolation compartments are added to the cabin, then cross-contamination prevention is improved, but device complexity increases

Engineering Contradiction:

Improvecross-contamination preventionVSAvoidcabin structure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The isolation compartment and airlock enclosure are nested within the existing cabin structure, utilizing available space efficiently. This nested configuration provides comprehensive isolation functionality without proportionally increasing overall cabin volume or structural complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The isolation compartment serves multiple functions: it isolates infected passengers, provides a controlled environment for medical attention, and can be integrated with existing cabin systems for power, lighting, and communications. This multi-functionality reduces the need for separate systems and minimizes overall complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If air recirculation systems with environmental conditioners are installed, then air quality and disinfection are improved, but energy consumption increases

Engineering Contradiction:

Improveair qualityVSAvoidenergy consumption

Core Design Contradiction:

Object-affected harmful factorsVSUse of energy by moving object

Solution Approach 1:

Environmental conditioners and UV illumination systems are installed locally within the isolation compartment and airlock rather than throughout the entire cabin. This localized approach provides targeted air treatment and disinfection where needed, reducing overall energy consumption compared to whole-cabin systems.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The UV illumination system operates in periodic cycles, particularly during periods when the compartment is occupied or during transitions. This periodic operation provides effective disinfection while minimizing continuous energy consumption, balancing air quality maintenance with energy efficiency.

Inventive Principle:

Principle #19Periodic action

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 solution effectively isolates sick passengers, reduces cross-contamination risk, and enhances travel safety by providing a secure environment for medical attention without exposing others to potential contamination.

Implementation Method 1

The interior airlock space is configured and adapted to be at a negative pressure relative to a cabin area

Methodology Applied

Scientific EffectNegative pressure: Pressure Gradient

Implementation Method 2

a UV illumination system positioned within the interior space configured and adapted to disinfect the interior space

Methodology Applied

Scientific EffectUV illumination: Ultrasonic Vibration

Implementation Method 3

The environmental conditioner can include a carbon filter

Methodology Applied

Scientific EffectCarbon filter: Adsorption

Implementation Method 4

The environmental conditioner can include an ozone scrubber

Methodology Applied

Scientific EffectOzone scrubber: Chemical Bonding

Implementation Method 5

The environmental conditioner can include a UVC light

Methodology Applied

Scientific EffectUVC light: Ultrasonic Vibration

Data Source

PatentUS12447226B2Cabin isolation assemblies

Publication Date: 2025.10.21 BE AEROSPACE INC

AI summary

An isolation section assembly includes a section housing defining an interior space. The section housing includes a door with access to the interior space. The isolation section assembly includes an enclosure abutting the door. The airlock enclosure defines an interior airlock space. The interior airlock space is configured and adapted to be at a negative pressure relative to a cabin area. An air recirculation system in fluid communication with at least one of the interior space of the section housing or the interior airlock space.