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Acoustic air duct and air extraction system including a plurality of channels having an expansion chamber

A technology of air extraction system and expansion chamber, applied in transportation and packaging, air handling equipment, heating/cooling equipment, etc.

Active Publication Date: 2018-10-23
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Multiple channels run along the airflow path within the outer wall

Method used

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  • Acoustic air duct and air extraction system including a plurality of channels having an expansion chamber
  • Acoustic air duct and air extraction system including a plurality of channels having an expansion chamber
  • Acoustic air duct and air extraction system including a plurality of channels having an expansion chamber

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Embodiment Construction

[0024] now refer to figure 1 , figure 1 A new and improved air extraction system 10 is shown schematically. The air extraction system 10 includes an air inlet shown as a trim panel inlet 12 . The fascia inlet 12 is located in the passenger compartment of the motor vehicle, for example in the rear window sill. The air extraction system 10 also includes an air extractor 14, which is typically located on a metal panel at the rear of the motor vehicle. Additionally, the air extraction system 10 includes an acoustic air duct 16 or 50 extending from the trim panel inlet 12 to the air extractor.

[0025] Such as figure 2 and 3 As shown, the acoustic airway 16 includes an outer wall 18 defining an elongated inner airflow passage 20 . A plurality of channels 22 extend along the airflow path 20 within the outer wall 18 .

[0026] Such as figure 2 As best shown, at least one channel 22 (and in this embodiment, figure 2 All three channels shown) have a frustoconical inlet end ...

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PUM

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Abstract

An air extraction system for a motor vehicle includes a trim panel inlet, an air extractor and an acoustic air duct extending from the trim panel inlet to the air extractor. The acoustic air duct includes an outer wall defining an elongated internal airflow passageway and a plurality of channels. Those channels extend along the airflow passageway within the outer wall. At least one of the channelshas an expansion chamber.

Description

technical field [0001] This document relates generally to the field of motor vehicle equipment and, more particularly, to new and improved air extraction systems, new and improved acoustic airways, and new and improved methods of reducing noise transmitted through the airways. Background technique [0002] Motor vehicle air extraction systems provide many functions that allow for proper airflow within the passenger compartment of a motor vehicle, control window fogging, and even reduce door closing force. Such an air extraction system includes an inlet (eg, a trim panel inlet), an air extractor, and an air passage connecting the trim panel inlet to the extractor. [0003] In order to accommodate the required airflow in the passenger compartment, ideally the air duct is designed with a large diameter and without an expansion chamber. And to control Noise, Vibration and Harshness (NVH), ideally the airway is designed with a small diameter and an expansion chamber. This docum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/00B60H1/24
CPCB60H1/00564B60H1/248B60H2001/006
Inventor 帕特里克·詹姆斯·布兰卡德赵海波
Owner FORD GLOBAL TECH LLC