Cyclonic separator
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Solution Overview
Problem
Single-stage cyclonic separators in vacuum cleaners have limited efficiency in separating fine and coarse solid particles, leading to clogging of fine dust filters and improper particle accumulation in dust tanks, which restricts design flexibility and increases operational inefficiencies.
Innovation Solution
A cylindrical cyclonic separator with a rectangular inlet and a prismatic flow path, featuring a specific geometry and dimensions that optimize particle retention, including a ramp with a 30-degree elevation angle and a sudden expansion zone, to effectively slow down and collect solid particles, while maintaining design flexibility and reducing filter clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-stage cyclonic separator is used, then the device complexity is reduced, but the separation efficiency of fine and coarse particles deteriorates
Solution Approach 1:
The cyclonic separator is divided into distinct functional zones: a coarse particle separation zone with a first outlet and a fine particle separation zone with a second outlet. This segmentation allows each zone to optimize for its specific particle size range, achieving high separation efficiency for both fine and coarse particles while maintaining a single-stage structure without complex multi-component assemblies.
2Reliability
If the inlet geometry is optimized for coarse particle separation, then coarse particle retention improves, but fine particle separation deteriorates
Solution Approach 1:
Different regions of the cyclonic separator are designed with locally optimized geometries: the coarse particle separation zone has inlet dimensions and flow path characteristics optimized for larger particles, while the fine particle separation zone has different dimensional ratios and flow path features optimized for smaller particles. This local quality differentiation enables simultaneous high efficiency for both particle size ranges.
3Ease of operation
If particles accumulate disproportionally at the tank base, then the tank requires frequent emptying and cleaning, but the cyclonic separator design becomes more complex
Solution Approach 1:
Instead of allowing particles to accumulate naturally at the tank base through gravity alone, the design inverts the approach by using the cyclonic flow pattern to actively distribute particles across the tank base. The tangential inlet and vortex flow create a particle distribution pattern that prevents disproportionate accumulation at any single location, reducing maintenance frequency without adding complex mechanical 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
The cyclonic separator achieves higher particle retention efficiency, with over 50% separation ratio as per IEC standards, and provides improved design flexibility and reduced filter clogging, enhancing the overall performance and economic feasibility of vacuum cleaners.
Implementation Method 1
For solid-gas separation (e.g. dust separation), various cyclonic separator designs are employed in different industries, as well as in household vacuum cleaners.
Implementation Method 2
the effects of forces acting during vortex formation differ from those at typical upright cyclonic separators
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
The present invention proposes a mainly cylindrical cyclone (1) for household vacuum cleaners, having a mainly rectangular inlet with a width (b) to height (a) ratio (b/a) at a value between 0.4 and 0.65; the cyclone further comprises a main axis (A1) and a mainly prismatic flow path (11) on a first plane (P1) orthogonal to the main axis (A1), wherein the flow path (11) comprises an inlet length (c) of at least 20 millimeters along a mainly linear flow axis (A2). The present invention further proposes a household vacuum cleaner comprising such cyclone.