Sound Mirror Air Duct Structure for Low-Noise Suction Flow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing suction devices face challenges in reducing noise while maintaining low pressure loss in air conveying systems, as sound waves propagate through outlets, leading to noise pollution.
Innovation Solution
The implementation of a sound mirror device with a specifically designed wall structure in the transitional area between the inlet and outlet tubes, which reflects and absorbs sound waves, reducing noise propagation by orienting walls to maximize reflection and minimize sound wave exit through the outlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sound absorbing elements are placed in the exhaust air outlet, then noise is reduced, but pressure loss increases
Solution Approach 1:
The harmful sound waves are extracted and separated from the main airflow path by the sound mirror device. The sound mirror reflects sound waves away from the outlet tube while allowing the main airflow to pass through with minimal obstruction, thus reducing noise without significantly increasing pressure loss.
Solution Approach 2:
The sound mirror device acts as an intermediary element between the airflow and the outlet. It selectively interacts with sound waves (reflecting them) while being transparent to the main airflow, thereby mediating between noise reduction requirements and airflow efficiency.
2Object-affected harmful factors
If a sound mirror device is added to the flow deflection element, then noise reduction is achieved, but device complexity increases
Solution Approach 1:
The sound mirror device is merged with the existing flow deflection element structure. The sound mirror is integrated into the transitional area between inlet and outlet tubes, combining noise reduction functionality with the existing airflow deflection structure rather than adding a completely separate component.
Solution Approach 2:
The wall structure in the transitional area serves multiple functions: it deflects airflow from the inlet to the outlet tube while simultaneously acting as a sound mirror to reflect noise away from the outlet. This multi-functionality reduces the need for additional dedicated noise control components.
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 approach effectively reduces noise levels with minimal pressure loss, achieving both noise reduction and efficient airflow by utilizing a sound mirror device with strategically oriented walls and a curved third wall for flow guidance.
Implementation Method 1
a sound mirror device, which reflects and/or absorbs sound
Implementation Method 2
a sound mirror device, which reflects and/or absorbs sound
Data Source
AI summary
A suction device is provided which includes a fan device for generating a suction air flow and an air conveying device having at least one flow deflection element comprising an inlet tube and an outlet tube, wherein the outlet tube is oriented transversely to the inlet tube, and wherein in a transitional area between the inlet tube and the outlet tube there is arranged a sound mirror device, which at least one of (i) reflects and (ii) absorbs sound.