Passenger Service Unit Air Shower Using Recirculated Cabin Air
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Solution Overview
Problem
Existing passenger service units (PSUs) in aircraft passenger cabins require connections to fresh air or air conditioning supply lines, complicating installation and increasing weight.
Innovation Solution
A PSU design that utilizes fans to recirculate cabin air through an air duct system, eliminating the need for connections to fresh air or air conditioning supply lines, and incorporating adjustable air showers and electronic components for enhanced ventilation and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PSUs are connected to fresh air or air conditioning supply lines, then reliable air supply is ensured, but installation complexity and weight increase
Solution Approach 1:
The invention extracts the air supply function from the centralized air conditioning system and implements it locally within each PSU using individual fans. This eliminates the need for complex supply line connections while maintaining reliable air supply to each passenger seat independently
Solution Approach 2:
The air supply system is segmented into independent PSU units, each with its own fan and air duct. This segmentation allows each unit to operate independently without requiring connections to centralized supply lines, simplifying installation while ensuring reliable local air supply
2Reliability
If PSUs are connected to fresh air or air conditioning supply lines, then adequate ventilation is provided, but weight increases
Solution Approach 1:
The air supply function is extracted from the centralized system and implemented locally with lightweight fan units, eliminating the weight of extensive supply line infrastructure while maintaining adequate ventilation through localized air circulation
3Ease of manufacture
If fans are integrated into the air duct, then installation is simplified, but air duct design becomes more complex
Solution Approach 1:
The fan and air duct are merged into an integrated assembly where the fan is mounted directly within the air duct structure. This combination simplifies installation as a single unit while the modular design manages the increased design complexity through standardized components
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
Simplifies installation, reduces weight, and enhances passenger comfort and air quality by allowing localized ventilation control and integration of air ionization, disinfection, and cooling modules.
Implementation Method 1
The air duct (24) contains at least one (especially electrically driven) fan. In its installed state and/or during operation the fan is designed to draw cabin air from the inlet opening (28) through the air duct (24) to the air showers (30).
Data Source
Figure 1
Figure 2
AI summary
In a PSU (2) for a passenger cabin (4) of a passenger aircraft (2) with a plurality of seats (8) for passengers (10) and at least one PSC (14) arranged above the seats (8), - with a base body (22) configured to mount the PSU (20) in a standard installation state (EZ) in the PSC (14), - with an air guide (24) arranged on the base body (22), - which includes at least one inlet opening (28) and at least one air shower (30) and an air duct (32) connecting the inlet openings (28) to the air showers (30) in an airtight manner, - and which in the installation state (EZ) is configured to guide cabin air (26) freely available exclusively in the passenger cabin (4), - wherein each of the air showers (30) in the installation state (EZ) is configured to ventilate at least one of the seats (8) with cabin air (26), - The air duct (24) contains at least one fan (34),and the fans (34) are configured in the installed state (EZ) to convey the cabin air (26) from the inlet openings (28) through the air duct (32) to the air showers (30).