Filter assembly
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Solution Overview
Problem
Existing motor filters require multiple components that increase product size and user maintenance complexity, leading to inefficiencies and user frustration due to the need for separate pre-motor and post-motor filters.
Innovation Solution
A compact filter assembly combining a pre-motor and post-motor filter in an annular configuration within a single housing, with efficient fluid flow paths and seals to minimize size and maintenance efforts, allowing for simultaneous handling and positioning around a motor for optimal space use and filtration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate filters (pre-motor and post-motor) are used, then filtration coverage is improved, but device complexity and product size increase
Solution Approach 1:
The patent combines both pre-motor and post-motor filters into a single integrated filter assembly that surrounds the motor. This merging approach maintains comprehensive filtration coverage while reducing the number of separate filter components from two to one, thereby simplifying the overall device structure.
Solution Approach 2:
The single filter assembly performs multiple functions by providing both pre-motor filtration (protecting the motor from incoming debris) and post-motor filtration (capturing particles expelled by the motor). This multi-functional design eliminates the need for separate specialized filters while maintaining comprehensive protection.
2Reliability
If multiple separate filters are used, then filtration effectiveness is improved, but ease of operation deteriorates due to separate maintenance requirements
Solution Approach 1:
By merging both pre-motor and post-motor filters into a single removable assembly, the patent enables users to access, remove, clean, and maintain both filters simultaneously as one unit. This eliminates the need for users to handle and maintain two separate filter components, significantly improving maintenance convenience while preserving comprehensive filtration effectiveness.
3Productivity
If filters are positioned to maximize surface area, then filtration efficiency is improved, but product size increases
Solution Approach 1:
The patent transitions from a linear arrangement of filters to a three-dimensional annular configuration that surrounds the motor in multiple directions. This dimensional change allows the filter assembly to maximize its surface area in contact with airflow paths without increasing the overall footprint or volume of the product, thereby maintaining compact dimensions while achieving high filtration efficiency.
Solution Approach 2:
The filter assembly is nested around the motor in an annular configuration, with the filters positioned in the space between the motor housing and the outer casing. This nesting approach allows the filters to occupy otherwise unused space, maximizing filtration surface area without adding to the external dimensions of the product.
4Volume of moving object
If annular filter configuration is used, then space efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The annular filter assembly is divided into multiple independent filter elements or sections that can be manufactured separately using standard filtration components. These segmented filters are then assembled around the motor in the annular configuration, allowing manufacturers to leverage existing filter manufacturing capabilities while achieving the space-efficient annular design.
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 combined filter assembly reduces product size, simplifies maintenance, and enhances filtration efficiency by maximizing surface area while minimizing fluid leakage and directional changes, ensuring effective motor performance and user convenience.
Implementation Method 1
Filters are key components in products containing motors, and particularly motors which generate a flow of fluid through the product such as vacuum cleaners. Without filters, dirt and debris can enter the motor, reducing its efficiency and performance overtime. In addition, motors themselves can produce emissions in the form of particles which may be undesirable to be released into the atmosphere.
Data Source
AI summary
A filter assembly includes 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.