Cyclone Dirt-Duct Air-Guide Layout for Vacuum Noise Reduction
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Solution Overview
Problem
Cyclone vacuum cleaners experience noise issues due to vortices in the dirt-duct, which cause Helmholtz resonance and tonal noise, and increasing the dirt-duct opening size compromises dirt separation performance.
Innovation Solution
An air-guide is integrated into the cyclone chamber adjacent to the dirt-duct, increasing the effective opening area to reduce air momentum and vortices, thereby minimizing noise without affecting dirt separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the dirt-duct opening size is increased to reduce air momentum and vortices, then noise is reduced, but dirt separation performance deteriorates
Solution Approach 1:
The air-guide divides the airflow into multiple paths by creating segmented flow channels. The air stream is split into a first air stream passing through a first opening and a second air stream passing through a second opening, allowing the airflow to be distributed and momentum reduced without requiring a single large opening that would compromise separation performance
Solution Approach 2:
The air-guide extends in the axial direction of the cyclone chamber, adding a dimensional element to the airflow control. By positioning the air-guide at a specific axial location and extending it along the axis, the invention controls airflow in three dimensions, creating multiple opening areas that collectively reduce noise while maintaining separation efficiency
2Object-affected harmful factors
If the dirt-duct opening area is increased to reduce Helmholtz resonance, then tonal noise is reduced, but the cyclone flow and separation efficiency are compromised
Solution Approach 1:
The air-guide creates multiple opening areas (first opening area and second opening area) that segment the airflow path. This segmentation allows the system to achieve the equivalent of a larger total opening area for noise reduction while maintaining the structural integrity and flow dynamics needed for effective separation
Solution Approach 2:
The air-guide acts as an intermediary structure between the cyclone chamber and the external environment. It mediates the airflow by providing controlled opening areas that reduce the direct impact of high-velocity air on the dirt-duct, thereby reducing Helmholtz resonance without disrupting the cyclone flow pattern
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 air-guide reduces oscillatory momentum and pressure fluctuations, leading to decreased tonal noise while maintaining high dirt separation performance by distributing air over a larger area, thus reducing noise without compromising cleaning efficiency.
Implementation Method 1
a cyclone vacuum cleaner having a cyclone separation device for separating particles from air
Implementation Method 2
the particles are displaced towards an outside circumference of the cyclone flow under the influence of centrifugal forces
Implementation Method 3
vortices in the dirt-duct, which cause Helmholtz resonance and tonal noise
Data Source
AI summary
The present invention relates to a cyclone separation device for separating particles from air and a cyclone vacuum cleaner (80). It has the objective to reduce noise without impairing the dirt separation performance. This is achieved an arrangement comprising a cyclone chamber (10), a dirt collecting chamber (50) arranged adjacent to the cyclone chamber (10) for collecting dirt particles separated from air, a dirt-duct (40) between the cyclone chamber (10) and the dirt collecting chamber (50) for allowing dirt particles to pass from the cyclone chamber (10) towards the dirt collecting chamber (50), and an air- guide (60) arranged adjacent to the dirt-duct (40) for reducing the momentum of the air in the dirt-duct (40).