Nested Cyclone Vacuum Separation for Compact Dust Collection
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Solution Overview
Problem
Conventional cyclonic separation apparatuses in vacuum cleaners often occupy excessive space, leading to less versatile designs and increased energy losses due to longer air flow paths, and require frequent filter replacements or emptying of collection chambers.
Innovation Solution
A compact cyclonic separation apparatus design featuring a first cyclonic separating unit with a cylindrical dirt container and a second unit comprising a circular array of smaller cyclones, where the second unit has higher separation efficiency and is located within the dirt container, reducing axial length and energy losses, and incorporating a cylindrical intermediate wall for additional filtration and to prevent re-entrainment of dirt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cyclonic separation apparatus is used in a vacuum cleaner, then dust and dirt can be separated from dirty air, but the apparatus occupies excessive space and increases the axial length of the device
Solution Approach 1:
The patent implements nesting by placing the second cyclonic separating unit inside the dirt container of the first cyclonic separating unit. The smaller cyclones are positioned within the larger separation chamber, allowing both separation stages to occupy the same spatial envelope. This nested configuration enables effective dust separation while minimizing the overall volume and axial length of the cyclonic separation apparatus.
2Reliability
If a conventional cyclonic separation apparatus with longer air flow path is used, then separation can occur, but energy losses increase
Solution Approach 1:
By nesting the second cyclonic separating unit within the first unit, the patent creates a compact two-stage separation system where the air flow path remains short. Dirty air enters the first cyclone for coarse separation, then proceeds directly to the second cyclone for fine separation, with both stages occurring in close proximity. This eliminates long inter-stage ducts and minimizes energy losses while maintaining effective separation.
Solution Approach 2:
The patent divides the separation process into two distinct stages: the first cyclonic separating unit handles coarse dust and dirt particles, while the second cyclonic separating unit handles finer particles. This segmentation allows each unit to be optimized for its specific separation task and positioned efficiently to minimize air flow path length, reducing energy losses compared to a single large separation chamber.
3Reliability
If filters are used for dust separation, then dust can be collected, but the filters become clogged and require frequent replacement
Solution Approach 1:
The patent replaces the mechanical filtration system with a cyclonic separation system that uses centrifugal force generated by rotating air flow. Instead of dust particles being trapped in filter media where they accumulate and clog the system, the cyclonic separators use mechanical centrifugal forces to throw particles outward to collection surfaces. This substitution eliminates filter clogging issues and reduces maintenance frequency, as the cyclonic system can be emptied without replacing 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 design enhances space utilization, maintains consistent suction power, reduces energy losses, and simplifies maintenance by allowing all separated dirt to be emptied together, improving user-friendliness and extending the time between emptying the dirt container.
Implementation Method 1
a cyclonic separation apparatus for use in vacuum cleaners
Implementation Method 2
separating out dust and dirt (and possibly also liquids) entrained with the dirty air
Data Source
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AI summary
A cyclonic separation apparatus (208) for a vacuum cleaner, the cyclonic separation apparatus comprising: a first cyclonic separating unit comprising a hollow cylindrical dirt container (320) with a central axis (321) and an air inlet port (326) arranged tangentially to the dirt container; and a second cyclonic separating unit comprising a plurality of cyclones (284) arranged in a circular array about the central axis, wherein each cyclone has an air inlet port (288) and an air outlet port (256), wherein the second cyclonic separating unit receives air flow downstream from the first cyclonic separating unit and wherein the second cyclonic separating unit has a higher separation efficiency than the first cyclonic separating unit, wherein the second separating unit is located within the dirt container. A vacuum cleaner comprising: a main body, a motor coupled to a fan and the cyclonic separation apparatus (208).