AIRCRAFT CABIN PNEUMATIC AIR CONDITIONING SYSTEM INCLUDING AN AMBIENT AIR COMPRESSOR

The pneumatic air conditioning system optimizes airflow by switching between ground and flight modes, using bleed and ambient air sources, to reduce engine load and energy consumption, ensuring efficient cabin temperature and pressure control across flight phases.

FR3162420A1Pending Publication Date: 2025-11-28LIEBHERR AEROSPACE TOULOUSE
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Patent Information

Application Number
FR2024005416
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2025-11-28

AI Technical Summary

Technical Problem

Existing aircraft air conditioning systems face challenges in minimizing air withdrawal from propulsion engines to reduce fuel consumption and maintain cabin temperature and pressure control across various flight phases, while also optimizing energy consumption and system integration.

Method used

A pneumatic air conditioning system with a network of pipes and control valves that switches between ground and flight modes, utilizing bleed air and ambient air sources, along with heat exchangers and an air cycle turbomachine, to optimize airflow and reduce engine load.

Benefits of technology

The system achieves efficient air conditioning with reduced energy consumption, compact integration, and adaptability to flight conditions, while maintaining cabin pressure and temperature control.

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Abstract

TITLE OF THE INVENTION: PNEUMATIC AIR CONDITIONING SYSTEM FOR AN AIRCRAFT CABIN COMPRISING AN AMBIENT AIR COMPRESSOR. The invention relates to an air conditioning system for an aircraft cabin (10) comprising a pressurized air source (12), a fresh air source (14), a dynamic air circulation duct (16), a network of pipes (40, 41, 42, 43, 44, 45, 46, 47, 48, 49) and control valves (50, 51, 52, 53, 54, 55, 56, 57, 58, 59), a primary cooling exchanger (PHx), a main cooling exchanger (MHx), a turbomachine (20) comprising at least one first compressor (22) and an expansion unit. (24, 26).The air conditioning system is characterized in that: said first compressor (22) comprises an air inlet adapted to be connected, upon control of said valves, to said fresh air source (14) and / or said primary cooling exchanger (PHx), and an air outlet connected to said main cooling exchanger (MHx); said expansion unit (24, 26) comprises an air inlet adapted to be connected, upon control of said valves, either to said primary cooling exchanger (PHx) or to said main cooling exchanger (MHx) and an air outlet adapted to be connected to said cabin (10). Figure for the abbreviation: Figure 1.
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