Wall passage
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Solution Overview
Problem
Air displacing units in ventilation systems cause noise nuisance due to limited distance between the units and the space they ventilate, making it difficult to achieve efficient sound damping and integration without aesthetic or functional compromises.
Innovation Solution
A wall passage with a sound trap featuring a chamber and baffle configuration that guides airflow transversely through the wall, incorporating a two-dimensional bend to prevent linear airflow and enhance sound damping, while minimizing flow resistance and overall depth, thus reducing noise and maintaining aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the air displacing unit is placed close to the space for efficient ventilation, then ventilation efficiency is improved, but noise nuisance increases
Solution Approach 1:
The wall passage is segmented into multiple sections: a first section with the air inlet, a second section with the air outlet, and an intermediate sound-damping section. This segmentation allows the air displacing unit to be positioned close to the space while the sound-damping section absorbs noise before it reaches the space.
Solution Approach 2:
A sound-damping material is introduced as an intermediary substance within the wall passage. This material absorbs sound waves generated by the air displacing unit, preventing noise from propagating into the ventilated space while allowing air flow to continue efficiently.
2Object-affected harmful factors
If a sound-damping channel is built into the wall, then noise reduction is improved, but wall integration becomes difficult
Solution Approach 1:
The wall passage is designed to perform multiple functions simultaneously: it provides a pathway for air flow from the air inlet to the air outlet, incorporates sound-damping material to reduce noise, and integrates into the wall structure without requiring complex modifications. This multi-functionality simplifies manufacturing and installation.
3Length of stationary object
If the channel cross-sectional area is reduced to fit in the wall, then wall integration is improved, but flow resistance increases
Solution Approach 1:
The sound-damping section is arranged in the wall thickness dimension rather than reducing the cross-sectional area of the air flow path. The air flow channel maintains sufficient cross-sectional area for low resistance, while the sound-damping material is positioned in the intermediate section along the wall thickness, utilizing the third dimension to resolve the conflict between compact integration and flow efficiency.
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 from air displacing units by attenuating sound waves through absorption and diffusion, minimizing noise nuisance while allowing for efficient airflow and integration into building structures without significant modifications.
Implementation Method 1
The wall passage is provided with a sound-damping material which is configured to damp propagation of sound from the air displacing unit to the space
Data Source
Figure 1
Figure 2A~2B
Figure 2C~3
AI summary
A wall passage provided to be incorporated in a wall of a building and configured to be connected to an air displacing unit, the wall passage comprising an air inlet and an air outlet, wherein provided between the air inlet and the air outlet is a sound trap which takes the form of a chamber with a chamber air inlet and a chamber air outlet between which at least a segment of the channel is situated, wherein the segment of the channel secondarily guides the airflow in a direction parallel to the wall and wherein the chamber is formed such that the airflow travels in the chamber through a substantially two-dimensional bend which lies parallel to the wall in order to prevent a linear airflow from the chamber air inlet to the chamber air outlet and so damp propagation of sound through the chamber.