Aircraft Ventilation Ducting for Cargo and Passenger Modes

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Solution Overview

Problem

Aircraft cabins used for both cargo and passenger transport require a ventilation system that can achieve high air blowing-out speeds for cargo transport while maintaining comfort for passengers, as existing systems either prioritize speed and weight or comfort and space.

Innovation Solution

A ventilating system with an air supply pipe and air distribution lines that can operate in two modes: high-speed air distribution directly from the lines for cargo mode and controlled air distribution via outlets for passenger comfort, allowing for flexible conversion between modes to suit different aircraft uses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a piccolo pipe is used for high-speed air blowing, then air blowing-out speed is improved, but air mixing control deteriorates

Engineering Contradiction:

Improveair blowing-out speedVSAvoidtemperature zone control

Core Design Contradiction:

SpeedVSEase of operation

Solution Approach 1:

The air supply system is segmented into multiple air distribution lines with individual control capability. Each air distribution line can be independently controlled to blow air at different speeds and directions, allowing both high-speed air blowing for ventilation and selective control for temperature zone management.

Inventive Principle:

Principle #1Segmentation

2Weight of moving object

If a piccolo pipe is used for cargo aircraft ventilation, then weight is reduced, but air mixing control deteriorates

Engineering Contradiction:

Improveventilation system weightVSAvoidtemperature zone control

Core Design Contradiction:

Weight of moving objectVSEase of operation

Solution Approach 1:

The air distribution lines are designed with adjustable and movable characteristics, allowing the system to dynamically adapt its air blowing parameters. This enables the lightweight piccolo-based system to achieve controlled temperature zones through dynamic adjustment of air flow characteristics rather than relying on fixed heavy infrastructure.

Inventive Principle:

Principle #15Dynamics

3Speed

If branch pipes are installed for passenger aircraft ventilation, then air speed control is improved, but installation space requirement increases

Engineering Contradiction:

Improveair blowing-out speed controlVSAvoidinstallation space

Core Design Contradiction:

SpeedVSVolume of stationary object

Solution Approach 1:

Multiple air distribution functions are merged into a single integrated air supply pipe system with branching air distribution lines. This consolidates what would traditionally require separate branch pipes and multiple air outlets into a more compact configuration that maintains speed control capability while reducing installation space requirements.

Inventive Principle:

Principle #5Merging (Combining)

4Ease of operation

If a full passenger cabin air supply system is installed for mixed-use aircraft, then passenger comfort is improved, but weight increases

Engineering Contradiction:

Improvepassenger comfortVSAvoidventilation system weight

Core Design Contradiction:

Ease of operationVSWeight of moving object

Solution Approach 1:

The air supply system is designed with multi-functionality to serve both cargo and passenger modes. The air distribution lines can operate in different configurations - providing high-speed air mixing for cargo ventilation or controlled low-speed air flow for passenger comfort - using the same physical infrastructure, thus eliminating the need for separate heavy systems for each mode.

Inventive Principle:

Principle #6Universality (Multi-functionality)

5Speed

If injector air outlets are added for cargo mode, then air blowing-out speed is improved, but device complexity increases

Engineering Contradiction:

Improveair blowing-out speedVSAvoidventilation system complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The system achieves variable air blowing speeds by changing operational parameters of the air distribution lines rather than adding physically complex injector mechanisms. The same air distribution infrastructure can deliver both high-speed air flow for cargo mode and controlled low-speed air flow for passenger mode through parameter adjustment, avoiding the complexity of dual-purpose hardware.

Inventive Principle:

Principle #35Parameter changes

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 system achieves high air blowing-out speeds for cargo transport while ensuring air speeds in passenger areas remain comfortable, optimizing air mixing and temperature control, and allowing for efficient conversion between modes to adapt to different aircraft configurations.

Implementation Method 1

air provided by the air source flows through the air supply pipe

Methodology Applied

Scientific EffectFluid flow:

Implementation Method 2

intensive air mixing occurs in the aircraft cabin

Methodology Applied

Scientific EffectAir mixing: Turbulence

Data Source

PatentUS8328607B2Enhanced piccolo ducting with sidewall air outlets

Publication Date: 2012.12.11 AIRBUS OPERATIONS GMBH

AI summary

A system for ventilating an aircraft cabin includes an air supply pipe connected to an air source, and a plurality of air distribution lines branching off from the air supply pipe. In a first operating state, the ventilating system is adapted to blow out the air, flowing through the air supply pipe, directly from the air distribution lines into the aircraft cabin. In contrast, in a second operating state of the ventilating system, at least some of the air distribution lines are connected to connecting lines which supply the air, flowing through the air supply pipe, to air outlets arranged in a distributed manner in the aircraft cabin.