Ventilation Duct Line Assembly with Nested Sound Reflection Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ventilation duct line assemblies fail to effectively reduce sound emissions when sound reduction structures are placed without considering the duct line's shape, leading to increased noise levels.
Innovation Solution
A ventilation duct line assembly design featuring a first portion with a smaller sectional area, a second portion with a larger sectional area, and an inclined inner face connecting them, along with a second ventilation duct line that reflects and emits sound internally, optimizing sound reduction by aligning the opening portion with the duct's inner side and using a rectangular or elliptical shape to enhance sound reflection and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a sound reduction structure is placed in a ventilation duct line assembly without considering the shape of the duct line, then the structure can be easily installed, but the degree of sound reduction is reduced
Solution Approach 1:
The patent applies local quality by positioning the sound reduction structure specifically in the first portion of the ventilation duct line where the sectional area is smaller, rather than uniformly distributing sound reduction measures throughout the entire duct system. This localized placement optimizes sound reduction effectiveness at the critical location where sound waves are most concentrated, while maintaining ease of installation by focusing the structural modification to a specific segment of the duct line.
2Object-affected harmful factors
If the opening portion of the second ventilation duct line is positioned on the inner side of the first portion, then sound reflection is enhanced, but the duct line complexity increases
Solution Approach 1:
The patent implements the nested doll principle by placing the second ventilation duct line inside the first ventilation duct line. The opening portion of the second duct line is positioned on the inner side of the first portion, creating a nested configuration where the smaller duct is contained within the larger duct structure. This nesting arrangement enhances sound reflection by creating multiple reflective surfaces while managing the overall complexity through a compact, space-efficient design.
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
This design significantly increases sound reduction in the ventilation duct line assembly by optimizing the shape and placement of sound reduction structures, improving airflow smoothness, and reducing noise emissions across various frequencies.
Implementation Method 1
a second ventilation duct line that has an opening portion positioned on an inner side of the first portion of the first ventilation duct line so that sound received from the opening portion is reflected inside the second ventilation duct line and then emitted from the opening portion
Data Source
AI summary
A first ventilation duct line has a first portion having a first sectional area, a second portion having a second sectional area larger than the first sectional area, and a third portion having an inclined inner face connecting the first portion and the second portion to each other. Further, there is a second ventilation duct line having an opening portion positioned on an inner side of the first portion of the first ventilation duct line.