Nested Multi-Stage Cyclonic Separator for Compact Vacuum Cleaners
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Solution Overview
Problem
Existing vacuum cleaners with cyclonic separation systems face issues such as complex and difficult-to-clean structures, limited air passage areas leading to poor dust collection performance, and low separation efficiency due to the circular cyclonic structure design.
Innovation Solution
A cyclonic separation device with a housing containing a first-stage cyclone separator and multiple second-stage cyclone separators arranged around it, featuring an air guide channel and spirally extending cyclone channels to enhance separation efficiency and reduce volume, along with an air flow-by opening to improve air intake and reduce air loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-stage cyclonic separation system with first-stage and second-stage separators is adopted, then dust collection performance is improved, but device complexity increases
Solution Approach 1:
The second-stage cyclone separators are nested within the housing that contains the first-stage cyclone separator. The housing serves as a common structure that accommodates both separation stages, with the second-stage separators positioned inside the same housing as the first-stage separator, creating a nested configuration that reduces overall device complexity while maintaining multi-stage separation functionality
Solution Approach 2:
The housing serves multiple functions: it contains the first-stage cyclone separator, accommodates the second-stage cyclone separators, provides structural support, and facilitates dust collection. This multi-functional design reduces the need for separate components for each function, thereby improving dust collection performance without proportionally increasing device complexity
2Productivity
If second-stage cyclone separators are placed above the dust bucket with structure inserted into first separation device, then separation efficiency is improved, but ease of operation deteriorates
Solution Approach 1:
The cyclonic separation system is segmented into distinct first-stage and second-stage separators, with the second-stage separators positioned within the housing but separated from the first-stage separator. This segmentation allows each stage to be optimized for its specific separation function while maintaining independent access for cleaning operations, improving both separation efficiency and ease of operation
Solution Approach 2:
The second-stage cyclone separators are arranged in a vertical dimension within the housing, positioned above the dust bucket but integrated into the overall structure. This vertical arrangement allows improved separation efficiency through multi-stage processing while maintaining ease of cleaning by providing accessible positions for maintenance operations
3Ease of operation
If first-stage dust chamber is placed outside first separation device, then accessibility is improved, but device complexity increases
Solution Approach 1:
The dust chamber is nested within the housing that contains the cyclone separators. The housing provides a unified structure that accommodates both the separation devices and the dust collection chamber, creating a compact integrated design that improves accessibility while reducing structural complexity compared to separate external mounting
4Productivity
If mesh cover with many holes is attached to first separation device, then filtration is improved, but ease of operation deteriorates
Solution Approach 1:
The mesh cover is extracted from the first separation device and integrated into the housing structure instead. By relocating the mesh cover to the housing, it becomes part of the fixed structure that can be cleaned as a unit with the housing, improving ease of operation while maintaining filtration performance through the same mesh configuration
5Device complexity
If single air duct is arranged in middle of cyclonic structure, then device complexity is reduced, but productivity deteriorates
Solution Approach 1:
The air passage system is segmented into multiple air ducts distributed within the housing rather than a single central duct. This segmentation increases the total air passage area and improves airflow distribution to multiple second-stage cyclone separators, enhancing productivity while maintaining relatively simple structural implementation through modular duct placement
6Manufacturing precision
If circular separation structure is employed, then manufacturing precision is improved, but productivity deteriorates
Solution Approach 1:
The cyclone separators incorporate asymmetric spiral channels and inclined surfaces that create asymmetric airflow patterns. This asymmetry generates stronger centrifugal forces and more effective dust separation, improving separation speed and productivity while maintaining manufacturing precision through standardized asymmetric component design that can be replicated
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 proposed design improves cyclonic separation efficiency, reduces the device's volume, and enhances user experience by providing better dust collection and easier cleaning, while maintaining effective air passage and filtration.
Implementation Method 1
Under the action of centrifugal forces, heavier dusty air rotates around a center of the circular structure and will be separated and flung out along a side wall of the circular structure
Data Source
AI summary
A cyclonic separation device and a vacuum cleaner including the cyclonic separation device are disclosed. The cyclonic separation device includes a housing and a cyclonic separation device. The cyclonic separation device is provided in the housing to allow dirt in a dust-containing airflow to be separated. The cyclonic separation device includes a first-stage cyclone separator and second-stage cyclone separators located downstream of the first-stage cyclone separator in a flow direction of the airflow. The second-stage cyclone separators surround the first-stage cyclone separator. The first-stage cyclone separator includes an air guide channel and a first-stage cyclone channel surrounding a part of the air guide channel. The dust-containing airflow enters, from the air guide channel, the first-stage cyclone channel for cyclonic separation and then enters the second-stage cyclone separators again through the air guide channel.