Annular Dual-Filter Assembly for Compact Motor Filtration
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Solution Overview
Problem
Existing motor systems in products like vacuum cleaners face efficiency and performance issues due to dirt and debris entering the motor without filters, and filters often require multiple components and maintenance, leading to size and usability challenges.
Innovation Solution
A compact filter assembly combining pre-motor and post-motor filters into a single annular housing with efficient fluid flow directions and sealing, allowing for simultaneous handling and maintenance, and integration with the motor for space optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate filters are used for pre-motor and post-motor filtration, then filtration effectiveness is improved, but product size and maintenance complexity increase
Solution Approach 1:
The patent combines the pre-motor filter and post-motor filter into a single integrated filter assembly that houses both filters together. This allows both filters to be maintained simultaneously through one removal action, reducing maintenance complexity while preserving the dual-filtration effectiveness. The assembly includes a first filter for pre-motor filtration and a second filter for post-motor filtration, both contained within one removable unit.
2Reliability
If multiple separate filters are used for pre-motor and post-motor filtration, then filtration effectiveness is improved, but product size increases
Solution Approach 1:
The patent positions the filter assembly such that it at least partially overlaps with the motor in a direction along the common axis, allowing the filters to nest around the motor. The annular filters are positioned concentrically with the motor, with the first filter adjacent to the motor inlet and the second filter adjacent to the motor outlet, enabling space-efficient integration without significantly increasing overall product volume.
Solution Approach 2:
The patent uses annular filters with a common axis that aligns with the motor axis, transitioning from a linear arrangement to a concentric, multi-dimensional layout. This allows the filters to wrap around the motor in three-dimensional space, maximizing filtration surface area while minimizing the axial length and overall footprint of the assembly.
3Volume of moving object
If annular filters with common axis are used, then space efficiency is improved, but manufacturing complexity may increase
Solution Approach 1:
The filter housing serves multiple functions: it houses both the pre-motor and post-motor filters, provides structural support for the annular configuration, enables simultaneous removal and installation of both filters, and maintains sealing between the filters and motor. This multi-functionality reduces the need for separate components and simplifies the overall manufacturing process despite the complex geometry.
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, efficient, and convenient filtration system that maximizes space usage, minimizes fluid leakage, and simplifies maintenance while maintaining motor performance and hygiene.
Implementation Method 1
a first filter; and a second filter, wherein the first filter is a pre-motor filter, and the second filter is a post-motor filter
Implementation Method 2
The filter housing may comprise an annular seal between the first and second filters. As a result, the seal can ensure that there is no fluid leakage around the housing between the pre- and post-motor filters
Data Source
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AI summary
A filter assembly comprising a filter housing, a first filter, and a second filter, wherein the first filter is a pre-motor filter, and the second filter is a post-motor filter, and both the first and second filters are fixed to the filter housing and are annular about a common axis.