Ventilation Component Layout for Low-Noise Airflow
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Solution Overview
Problem
Existing ventilation components produce significant noise despite being filled with sound-absorbing materials and are inefficient in soundproofing, especially when the sound-damping materials are located behind the fan in the flow direction.
Innovation Solution
A ventilation component with circumferentially arranged soundproofing and/or sound-damping materials on the housing walls upstream of the fan, combined with a radial fan and a sound-damping link filled with absorption material, ensuring sound dampening in both flow directions with minimal pressure loss and noise emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sound-absorbing material is placed behind the fan in the flow direction, then the fan can operate efficiently, but the ventilation component produces significant noise emissions
Solution Approach 1:
The soundproofing measure is divided into two separate segments: circumferential soundproofing material on the housing walls upstream of the fan, and a separate link filled with sound-absorbing material positioned behind the fan. This segmentation allows each component to address specific noise pathways without interfering with fan performance.
Solution Approach 2:
The soundproofing approach transitions from a single-dimensional placement (only behind the fan) to a multi-dimensional configuration by adding circumferential soundproofing on the upstream housing walls and positioning the link at a distance from the housing walls, creating a three-dimensional sound dampening zone around the fan.
2Object-generated harmful factors
If sound-absorbing material is placed directly against housing walls, then soundproofing is improved, but pressure losses increase
Solution Approach 1:
The soundproofing material is applied locally only in specific regions where noise generation occurs (upstream on housing walls and in the link behind the fan), rather than uniformly throughout the housing. The link is positioned at a distance from the housing walls to maintain local acoustic damping without creating restrictive flow paths.
Solution Approach 2:
The link filled with sound-absorbing material acts as an intermediary element between the fan and the housing walls, providing sound dampening while maintaining a gap that allows gas to flow around it, thus preventing direct contact that would cause pressure losses.
3Device complexity
If the splitter is placed close to housing walls for compact design, then device size is reduced, but sound energy cannot be effectively absorbed
Solution Approach 1:
The link is positioned in three-dimensional space at a distance from the housing walls rather than being flattened against them, creating a circumferential free space that allows sound waves to reach the sound-absorbing material from multiple directions while maintaining compact overall device dimensions.
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
The solution effectively reduces noise emissions and maintains low pressure losses, making the ventilation component suitable for decentralized use with improved soundproofing capabilities.
Implementation Method 1
the area between the longitudinal and/or transverse external dimensions of the splitter is at least partially, preferably completely, filled with the sound absorption material
Implementation Method 2
Each baffle and/or the soundproofing and/or soundproofing material is(are) preferably made of a porous material such as mineral wool or glass wool
Data Source
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AI summary
The invention relates to a ventilation component comprising a channel-shaped housing with circumferentially arranged housing walls of preferably rectangular or square cross-section, wherein at least one fan, in particular a radial fan, is located in the housing with a baffle arranged behind the fan for sound attenuation in the direction of flow, wherein the area between the longitudinal and/or transverse outer dimensions of the baffle is at least partially, preferably completely, filled with the sound absorption material, wherein the baffle is arranged at a distance from the housing walls and thus the baffle is surrounded on all sides by a circumferential free space for the flow of the gas, so that the baffle can be surrounded on all sides by the flowing gas.To specify a ventilation component that provides improved sound insulation, at least one circumferential sound-insulating and/or sound-absorbing material, preferably provided directly on the housing walls and leaving at least one, in particular central, flow channel free, should be provided in the area of the housing walls upstream of the fan in the direction of flow.