Two-Stage Cyclone Separator With Anti-Re-Entrapment Dust Lips
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Solution Overview
Problem
Conventional vacuum cleaners with bag filters require frequent replacement and maintenance due to clogging, leading to reduced suction power and increased costs, while cyclonic separation systems often have lower separation efficiency and require complex configurations.
Innovation Solution
A two-stage cyclonic separation apparatus with a cylindrical intermediate wall and protruding lips to enhance separation efficiency, featuring a first cyclonic unit with a tangential air inlet and a second unit with cyclones arranged in a circular array, which improves dust and dirt separation and reduces re-entrainment of particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bag filter is used for dirt separation, then dust and dirt can be filtered and collected, but the bag filter clogs progressively reducing air flow rate and suction power
Solution Approach 1:
The cyclonic separation apparatus is divided into a first cyclonic separating unit and a second cyclonic separating unit arranged in series. The first unit handles larger particles while the second unit handles finer particles, segmenting the separation task to maintain efficiency without clogging a single filter element.
Solution Approach 2:
The patent replaces the mechanical bag filter system with a cyclonic separation system that uses centrifugal force generated by rotating air flow. This mechanical substitution eliminates the clogging problem inherent in bag filters while maintaining dust separation effectiveness.
2Device complexity
If a single cyclonic separating unit is used, then the device complexity is reduced, but the separation efficiency is lower
Solution Approach 1:
The cyclonic separation system is segmented into two distinct units with different functions: the first unit separates larger particles and the second unit separates finer particles. This segmentation increases separation efficiency without requiring an overly complex single-unit design.
Solution Approach 2:
The patent arranges the two cyclonic units in series along the air flow path, adding a temporal dimension to the separation process. This allows progressive separation of particles of different sizes, enhancing overall efficiency while maintaining relatively simple individual unit designs.
3Loss of time
If cyclonic separation is used instead of bag filter, then filter replacement frequency is reduced, but separation efficiency is lower
Solution Approach 1:
By segmenting the cyclonic separation into two units, the system achieves high separation efficiency comparable to or exceeding bag filters, while maintaining the advantage of no filter replacement needed. The segmented design handles different particle sizes efficiently in sequence.
Solution Approach 2:
The patent replaces the consumable bag filter system with a reusable cyclonic separation system. The mechanical cyclone design eliminates the need for filter replacement while achieving superior separation through centrifugal force and multi-stage processing.
4Reliability
If a two-stage cyclonic separation system is implemented, then separation efficiency is improved, but the device complexity increases
Solution Approach 1:
Both cyclonic units are designed with the same basic structural principles and can be manufactured using similar processes. The modular, universal design reduces overall complexity despite having two stages, as each unit serves a specific function in the series arrangement.
Solution Approach 2:
The two cyclonic units are arranged in series along the air flow path, utilizing the spatial dimension to sequence the separation stages. This linear arrangement maintains simplicity while achieving enhanced separation efficiency through progressive particle removal.
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 solution maintains consistent suction power, reduces the need for frequent filter replacements, and increases separation efficiency by effectively capturing larger particles and preventing re-entrainment, thus prolonging the time between emptying the dust container.
Implementation Method 1
a first cyclonic separating unit comprising a hollow substantially cylindrical dirt container with a longitudinal central axis and an air inlet port arranged tangentially through a side of the dirt container; a second cyclonic separating unit comprising at least one cyclone with an air inlet port
Implementation Method 2
a first cyclonic separating unit comprising a hollow substantially cylindrical dirt container with a longitudinal central axis and an air inlet port arranged tangentially through a side of the dirt container
Implementation Method 3
wherein the cyclonic separation apparatus comprises at least a first protruding lip arranged to impede return of separated material from said longitudinal end of the dirt container
Data Source
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AI summary
A cyclonic separation apparatus (208) for a vacuum cleaner (202), the cyclonic separation apparatus (208) comprising: a first cyclonic separating unit (360) comprising a hollow cylindrical dirt container (320) with a central axis (321) and an air inlet port (326) arranged tangentially through a side of the dirt container (320); a second cyclonic separating unit (350) comprising at least one cyclone (284) with an axial inlet port (288), an axial outlet port (256) and a discharge nozzle (287); a substantially cylindrical intermediate wall (290) surrounding the inlet port (288) of the at least one cyclone (284); and at least one protruding lip (304, 328) arranged to impede return of separated material from a longitudinal end of the dirt container (320), wherein the at least one lip (304, 328) protrudes radially inwardly from an inner surface of the dirt container (320) and/or radially outwardly from the intermediate wall (290).