Nested Cyclone Filter Layout for Vacuum Dust Separation
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Solution Overview
Problem
Existing vacuum cleaners face inefficiencies in separating dust particles from airflow, with a risk of dust passing through the motor fan unit, leading to potential damage and reduced efficiency, despite the use of pre-motor and post-motor filters.
Innovation Solution
A separating apparatus comprising a first cyclonic cleaning stage, a second cyclonic cleaning stage with multiple secondary cyclones, and an elongate filter surrounded by the first cyclonic stage, which captures remaining dust particles effectively, utilizing a combination of cyclonic separation and electrostatic filtration to enhance dust removal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-motor and post-motor filters are used to capture dust particles, then dust protection is improved, but device complexity increases
Solution Approach 1:
The patent combines the pre-motor filter and post-motor filter into a single integrated filter assembly that performs both functions simultaneously. The filter assembly is positioned to capture dust particles before they reach the motor while also filtering particles that escape the cyclonic separator, thereby reducing the number of separate components needed while maintaining comprehensive dust protection.
Solution Approach 2:
The filter assembly is designed to serve multiple functions: it acts as a pre-motor filter to protect the motor, a post-motor filter to capture remaining particles, and potentially a HEPA filter for high-efficiency particle removal. This multi-functional design reduces overall system complexity by consolidating multiple filtering stages into one component.
2Reliability
If multiple cyclonic stages are used to improve dust separation efficiency, then separation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent employs a nested cyclonic separation system where a secondary cyclone is positioned inside or around the primary cyclone. This nested arrangement allows two stages of cyclonic separation to occur within a compact footprint, improving dust separation efficiency without proportionally increasing the overall device size or complexity.
Solution Approach 2:
The patent transitions from a single-stage horizontal cyclonic separation to a multi-stage system that utilizes vertical space and radial arrangements. By stacking cyclonic stages vertically or arranging them in concentric circles, the system achieves enhanced separation efficiency while maintaining a compact overall form factor.
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 provides a compact and efficient dust separation system that significantly reduces the likelihood of dust particles reaching the motor fan unit, maintaining high separation efficiency while extending filter lifetime.
Implementation Method 1
a first cyclonic cleaning stage, a second cyclonic cleaning stage comprising a plurality of secondary cyclones
Implementation Method 2
cyclonic separating apparatus are known to comprise a low efficiency cyclone for separating relatively large particles
Implementation Method 3
an elongate filter arranged downstream of the second cyclonic cleaning stage, wherein the filter is at least partially surrounded by the first cyclonic cleaning stage
Implementation Method 4
the filter may be a barrier filter. As used herein the term 'barrier filter' shall be taken to mean a filter which captures and holds dirt and dust particles within the body of the filter
Data Source
AI summary
The present invention relates to a separating apparatus for separating particles from a fluid flow. Particularly, but not exclusively, the invention relates to a vacuum cleaner having such a separating apparatus for removing dust particles from a dust laden airstream. The separating apparatus includes a first cyclonic cleaning stage, a second cyclonic cleaning stage arranged downstream from the first cyclonic cleaning stage, and an elongate filter arranged downstream from the second cyclonic cleaning stage, wherein the filter is at least partially surrounded by the first cyclonic cleaning stage.