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Sound absorbing duct for environmental control system

A pipe and ventilation pipe technology, applied in the field of sound-absorbing pipes used in environmental control systems, can solve the problems of increasing cost, reducing performance, increasing the weight, volume and cost of environmental control systems, etc.

Active 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

However, noise attenuating mufflers add weight, bulk and cost to the environmental control system
In high-performance vehicles such as aircraft, added weight and volume increase cost and reduce performance

Method used

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  • Sound absorbing duct for environmental control system
  • Sound absorbing duct for environmental control system
  • Sound absorbing duct for environmental control system

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Embodiment Construction

[0039] The disclosed embodiments 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 embodiment, a first conduit (eg, a first type of conduit) comprises a rigid vent tube of composite material forming an inner surface or wall of the first conduit. The first conduit also includes a layer of insulation (such as foam or felt) and a non-rigid outer lining. The non-rigid outer lining seals the duct to form an airtight duct wall and provides an outer or second layer of thermal and acoustic insulation. In contrast to conventional ducts that include rigid outer walls (or rigid outer walls wrapped in non-...

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PUM

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Abstract

The application relates to a sound absorbing duct for an environmental control system. A duct includes a rigid air-permeable tube of composite material. The duct also includes a layer of insulation coupled to an exterior surface of the rigid air-permeable tube. The duct further includes a non-rigid insulation layer in contact with the layer of insulation. The non-rigid insulation layer forms an air-impermeable duct wall.

Description

technical field [0001] The present disclosure generally relates to ducting for sound-absorbing environmental control systems. Background technique [0002] Vehicles, such as aircraft, include environmental control systems to provide treated air, eg, conditioned air, filtered air, etc., to passengers. Environmental control systems typically include ducts that deliver conditioned air to the vehicle's occupants. Moving the conditioned air within the ducts 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, added weight and volume increases cost and reduces performance. Contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/033F16L59/02
CPCF16L55/033F16L59/029B32B5/18B32B2605/18B32B1/08B32B5/024B32B5/245B32B7/12B32B5/26B32B5/022B32B27/12B32B2266/0285B32B2307/102B32B2307/304B32B2307/718B32B2250/20B32B27/288B32B27/286B32B2307/724B32B2307/7242B32B3/12B32B3/08B32B3/266B32B2266/06B32B27/065B32B27/304B32B27/08B32B2307/3065B32B2597/00F24F13/0263F24F2013/242B64D2013/0603F24F13/0245F24F13/0281
Inventor B·A·范戴克J·E·韦斯特D·D·玛本A·K·冯D·R·C·坎纳尔
Owner THE BOEING CO