Aero-Acoustic Duster Using Bounded Vortex Dust Removal
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Solution Overview
Problem
Conventional vacuum cleaners cause surface wear and can become breeding grounds for bacteria due to direct contact, and existing air jet impingement methods for heating and drying lack efficiency in particle removal and heat transfer.
Innovation Solution
The aero-acoustic duster employs a wall normal standing vortex generated by tilted jets and a vacuum port to create a high shear stress region for efficient particle removal without direct contact, combined with acoustic radiation to levitate dust particles and enhance heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional vacuum cleaners are used for dust removal, then dust particles can be removed from surfaces, but surface wear increases and bacteria breeding areas are created due to direct contact
Solution Approach 1:
The patent replaces the mechanical contact system of conventional vacuum cleaners with an acoustic field system. Acoustic radiation pressure and acoustic streaming create air flow that removes dust particles without mechanical contact, eliminating surface wear and preventing bacteria breeding while maintaining dust removal effectiveness
Solution Approach 2:
The patent introduces acoustic waves as an intermediary between the vacuum source and the dust particles. The acoustic field mediates the interaction by creating radiation pressure and streaming effects that move particles toward the vacuum port without direct mechanical contact, thus resolving the contradiction between dust removal and surface protection
2Temperature
If air jet impingement is used for heating and drying, then heat transfer and mass transfer are enhanced, but energy expenditure increases and particle removal efficiency is insufficient
Solution Approach 1:
The patent merges heating/drying functions with dust removal functions into a single integrated system. The acoustic field simultaneously creates air flow for particle removal and enhances heat and mass transfer, eliminating the need for separate high-energy air jet impingement systems while achieving both objectives
Solution Approach 2:
The patent changes the physical parameters of the system by using acoustic radiation pressure and acoustic streaming instead of high-velocity air jets. This parameter change enables effective particle removal and heat/mass transfer enhancement with lower energy expenditure, as acoustic fields can achieve similar effects to mechanical impingement with reduced energy input
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 system achieves high particle removal rates with low energy expenditure, minimizing surface wear and bacterial growth, while improving heating and drying processes by effectively removing dust and transferring heat without direct contact.
Implementation Method 1
Acoustic radiation force may be used to levitate dust particles and break their adhesive bonds.
Implementation Method 2
The wall normal vortex acts to enhance shear stress under the suction region, hence increasing the ability of the air flow to entrain particles.
Implementation Method 3
The wall normal vortex acts to enhance shear stress under the suction region
Implementation Method 4
a vacuum port for vacuuming dust excited by the tangential air flow combination
Data Source
AI summary
The invention disclosed herein provides for high particle removal rate and/or heat transfer from surfaces. The device removes particulate matter from a surface using a bounded vortex generated over the surface, with suction in the vortex center and jets for blowing air along the periphery. The jets are tilted in the tangential direction to induce vortex motion within the suction region. The vortex is said to be bounded because streamlines originating in the downward jets are entrained back into the central vortex.