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Sound absorbing duct with foam-filled honeycomb core for environmental control system

A foam-filled, honeycomb-core technology for use in pipes, applications, rigid pipes, etc.

Pending Publication Date: 2020-02-28
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-rigid insulation forms an air-tight duct wall

Method used

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  • Sound absorbing duct with foam-filled honeycomb core for environmental control system
  • Sound absorbing duct with foam-filled honeycomb core for environmental control system
  • Sound absorbing duct with foam-filled honeycomb core for environmental control system

Examples

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Embodiment Construction

[0039] The disclosed examples provide ducts that absorb sound for use in environmental control systems. A method of making the pipe is also disclosed. Ducts according to certain aspects disclosed herein can be used as noise attenuating mufflers and can reduce the use of dedicated noise attenuating mufflers in environmental control systems. For example, conventional ducts and noise attenuating mufflers can be replaced with the disclosed ducts.

[0040] In a first example, a first conduit (eg, a first type of conduit) includes a rigid vent tube of composite material forming an interior surface or wall of the first conduit. The first conduit also includes an insulating layer (eg, foam or felt) and a non-rigid outer lining. The non-rigid outer lining seals the duct to form an air-tight duct wall and provides an outer or second layer of thermal and acoustic insulation. The first duct includes a non-rigid outer lining that seals the duct and provides thermal insulation (and some ...

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PUM

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Abstract

The invention provides a sound absorbing duct with a foam-filled honeycomb core for an environmental control system. A duct includes a foam-filled honeycomb core structure having a tubular shape. Theduct further includes an air-impermeable duct wall coupled to an exterior surface of the foam-filled honeycomb core structure.

Description

technical field [0001] The present disclosure relates generally to ducting with a sound-absorbing foam-filled honeycomb core for environmental control systems. Background technique [0002] Vehicles, such as aircraft, include environmental control systems that provide conditioned air (eg, conditioned air, filtered air, etc.) to passengers. Environmental control systems typically include ducts that deliver conditioned air to the vehicle's occupants. The conditioned air moving within the duct creates noise which may reduce passenger comfort. Noise attenuation mufflers (eg, zone mufflers) are commonly used to reduce (eg, absorb) noise generated by moving air. For example, mufflers surround the ducting of an environmental control system and use insulation and / or chambers to attenuate noise. However, noise attenuating mufflers add weight, bulk and cost to the environmental control system. In high performance vehicles, such as aircraft, the added weight and volume increases co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D13/00B64D47/00B29D23/00
CPCB64D13/00B64D47/00B29D23/001B29C70/30B32B5/18B32B2605/18B32B1/08B32B5/024B32B5/245B32B7/12B32B5/26B32B5/022B32B27/12B32B2266/0285B32B2307/102B32B2307/304B32B2307/718B32B2250/20B32B27/288B32B27/286B32B2307/724B32B2307/7242B32B3/12B32B3/08B32B3/266B32B2266/06B32B27/065B32B27/304B32B2307/3065B32B27/08B32B2597/00B29C44/18B29C70/545B29K2105/04B29K2995/0002B64D13/06B64D2013/0625F16L9/21G10K11/168
Inventor D·D·玛本B·A·范戴克M·M·吉姆瑞克D·R·C·卡纳尔
Owner THE BOEING CO