Vacuum cleaner
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Solution Overview
Problem
Existing cyclonic vacuum cleaners face inefficiencies in debris separation and air filtration, particularly in redirecting airflow and capturing fine debris, which affects cleaning efficacy and maintenance.
Innovation Solution
A vacuum cleaner design featuring a cyclonic separator assembly with a shroud and vanes that redirect airflow, a mesh screen to filter debris, and a filter within the shroud to separate and collect debris, enhancing debris separation and air cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cyclonic separator is used to separate debris from airflow, then debris separation is improved, but fine debris may still pass through the filter reducing air cleanliness
Solution Approach 1:
The cyclonic separator is divided into multiple stages with different separation mechanisms. The first stage uses a standard cyclone for coarse debris, while the second stage employs a reverse cyclone configuration specifically targeted at capturing fine debris that escaped the first stage, achieving comprehensive particle separation across different size ranges
Solution Approach 2:
The patent employs a reverse cyclone configuration in the second stage where the rotation direction is opposite to the first stage. This inversion creates a different airflow pattern and centrifugal force direction that is particularly effective at capturing fine particles that were not separated by the conventional cyclone, thereby improving overall filtration effectiveness
2Manufacturing precision
If airflow is redirected through vanes and a shroud, then debris separation is enhanced, but device complexity increases
Solution Approach 1:
The shroud and vanes are integrated into a single molded component rather than separate parts. This merging of functions reduces the number of assembly steps and fasteners while maintaining the airflow redirection capability, thereby enhancing debris separation without proportionally increasing device complexity
Solution Approach 2:
The shroud serves multiple functions simultaneously: it acts as a structural support for the vanes, defines the airflow passageway, provides mounting for the mesh screen, and contributes to the overall cyclonic flow pattern. This multi-functionality reduces the total component count and simplifies the separator assembly structure
3Reliability
If a mesh screen is added to cover the airflow passageway, then fine debris capture is improved, but pressure drop across the separator increases
Solution Approach 1:
The mesh screen is strategically positioned only in specific regions where fine debris concentration is highest, rather than covering the entire airflow passageway. This localized filtration approach captures fine particles effectively while minimizing the total screen area that would contribute to pressure drop and energy consumption
Solution Approach 2:
The mesh screen employs a porous structure with optimized pore size and distribution that allows airflow to pass through with minimal resistance while still effectively capturing fine debris. The porous design reduces the pressure drop compared to a solid barrier, thereby lowering suction power consumption while maintaining filtration effectiveness
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 effectively separates debris from airflow, minimizes debris passing through the filter, and facilitates easy maintenance by allowing for the removal and cleaning of the filter and debris collection chamber, improving overall cleaning efficiency and user experience.
Implementation Method 1
a container that defines a cyclonic separator about a separator axis. The container has a dirty air inlet positioned to receive the airflow and debris to rotate around the separator axis in a first direction within the container
Implementation Method 2
the airflow and debris to rotate around the separator axis in a first direction within the container
Implementation Method 3
a shroud forming an airflow passageway between the dirty air inlet and the clean air outlet. The airflow passageway is formed by a plurality of vanes defining openings between adjacent vanes positioned to direct the airflow and debris in a second direction at least partially opposed to the first direction redirecting airflow into the shroud
Implementation Method 4
a mesh screen positioned on the shroud outside the plurality of vanes to cover the airflow passageway
Implementation Method 5
a filter at least partially within the shroud extending around the separator axis positioned in an airflow path between the plurality of vanes and the clean air outlet
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A vacuum cleaner including a separator assembly having a container that defines a cyclonic separator about a separator axis. The container having a dirty air inlet that receives the airflow and debris to rotate around the separator axis in a first direction. A clean air outlet discharges the airflow from the separator assembly. A shroud forming an airflow passageway is between the dirty air inlet and the clean air outlet. The airflow passageway is formed by a plurality of vanes defining openings between adjacent vanes positioned to direct the airflow and debris in a second direction at least partially opposed to the first direction redirecting airflow into the shroud. A mesh screen is positioned on the shroud covering the airflow passageway and a filter at least partially within the shroud extends around the separator axis positioned in an airflow path between the plurality of vanes and the clean air outlet.