Passenger Service Unit Vortex Tube for Seat-Level Air Temperature Control
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Solution Overview
Problem
Passengers on commercial aircraft lack control over the temperature of the air flow from overhead nozzles in passenger service units, limiting their ability to customize their ambient environment.
Innovation Solution
Integration of a vortex tube into the passenger service unit, which separates cabin air into hot and cold streams, allowing passengers to selectively adjust the nozzle to blend these streams and control the temperature and flow rate of the air stream entering the passenger space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional overhead nozzle is used in the passenger service unit, then the structure is simple and requires no additional components, but the passenger cannot control the temperature of the air flow
Solution Approach 1:
The patent combines the vortex tube temperature control mechanism with the existing overhead nozzle structure. The vortex tube is integrated into the nozzle assembly, allowing the same component to perform both air flow delivery and temperature control functions, thereby reducing overall system complexity while adding temperature adaptability.
Solution Approach 2:
The overhead nozzle is designed to serve multiple functions: delivering cabin air to the passenger space and simultaneously controlling the temperature of that air through the integrated vortex tube mechanism. This multi-functionality allows a single component to address both air delivery and temperature regulation needs.
2Ease of operation
If mass cabin conditioning is used to maintain comfortable temperature, then the entire cabin environment is controlled, but energy consumption increases
Solution Approach 1:
The vortex tube enables local temperature control at each passenger seat rather than uniform conditioning of the entire cabin. Each passenger can independently adjust the temperature of air delivered to their specific location, allowing only localized areas to be conditioned based on individual preferences and needs.
Solution Approach 2:
The cabin air conditioning system is segmented into individual controllable units at each passenger service unit. Instead of treating the cabin as a single conditioned space, the system divides it into multiple independent zones, each with its own temperature control capability through the vortex tube mechanism.
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
Enables passengers to control the temperature of the air flow, increasing comfort and reducing the need for mass cabin conditioning, leading to more efficient aircraft operation without moving parts, electricity, or refrigerant.
Implementation Method 1
a vortex tube, configured to: receive an inlet air stream; separate the inlet air stream into a warmer air stream and a cooler air stream
Implementation Method 2
direct the air inlet stream within the inner air passageway to a conical nozzle configured to separate the air inlet stream into a warmer air stream and a cooler air stream
Data Source
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Figure 3A
AI summary
A temperature control system in an aircraft passenger service unit is disclosed. In embodiments, the system includes a swirl chamber (106) configured to receive an inlet air stream, and a vortex tube (100) configured to receive the inlet air stream from the swirl chamber and separate the inlet air stream into a warmer air stream and a cooler air stream. In embodiments, the system further includes a nozzle (108) configured to direct a temperature-controlled air stream into a passenger space of an aircraft; wherein the nozzle is configured to be selectably adjusted in order to selectively blend the warmer air stream and the cooler air stream in order to generate the temperature-controlled air stream.