Stretchable Vacuum Filter for Self-Cleaning Dust Shedding
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Solution Overview
Problem
Conventional vacuum cleaner filters clog quickly, reducing suction power and requiring frequent emptying, as they lack sufficient surface area and self-cleaning capabilities.
Innovation Solution
A retrofit kit with a self-cleaning, flexible interlocking fabric filter that increases its surface area by at least 10% under vacuum, featuring a washable and reusable fabric attached to a cage with a quick release mechanism, allowing it to relax and contract when not in use, effectively shedding debris and maintaining suction power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filters are used, then the vacuum cleaner can operate, but the filters clog quickly reducing suction power and requiring frequent emptying
Solution Approach 1:
The filter is designed with dynamic surface area that changes during operation. The flexible filter material expands or stretches when vacuum pressure is applied, increasing the filtering surface area dynamically to handle higher particle loads without clogging, then contracts when not in use to shed debris
Solution Approach 2:
The filter's physical parameters are changed by applying vacuum pressure, which causes the flexible filter material to stretch and increase its surface area. This parameter change allows the filter to maintain lower pressure drop and sustain suction power for longer periods
2Reliability
If filter surface area is increased to reduce clogging, then suction power lasts longer, but the filter size and complexity increase
Solution Approach 1:
Rather than using a large static filter structure, the invention employs a compact filter that dynamically expands to a larger surface area during operation. This dynamic approach achieves high reliability without increasing the installed size or structural complexity of the filter assembly
Solution Approach 2:
The filter assembly is designed to nest compactly within the vacuum cleaner housing when not in use, yet expands to provide a large filtering surface area during operation. The cage structure and flexible filter material are configured to maximize space efficiency in the retracted state while providing adequate surface area when deployed
3Ease of operation
If conventional filters are used, then the structure is simple, but they lack self-cleaning capabilities requiring frequent manual cleaning
Solution Approach 1:
The filter incorporates self-cleaning capabilities through its flexible material properties. When vacuum pressure is applied, the filter stretches and sheds accumulated debris. When not in use, the filter contracts and can be easily shaken or tapped to remove particles, eliminating the need for frequent manual cleaning operations
Solution Approach 2:
The filter undergoes periodic stretching and contracting cycles during vacuum operation and idle periods. This periodic mechanical action naturally sheds accumulated debris from the filter surface, providing self-cleaning functionality that reduces maintenance frequency
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 kit provides longer-lasting suction power, reduces the frequency of filter cleanings, and is ecologically friendly by being washable and reusable, increasing suction power from 20 to 80% compared to conventional filters.
Implementation Method 1
the filter having at least enough stretchability to increase its surface area by at least 10% in its stretched position from its rest position
Implementation Method 2
when the vacuum cleaner is subsequently not operating, the filter relaxes, returns to its rest position and its surface area contracts to be self-cleaning, the contracting causing a portion of the dust and debris to fall from the filter
Implementation Method 3
when the filter kit is in the vacuum cleaner and the vacuum is operating, the filter is in its stretched position and collects dust and debris
Data Source
AI summary
A filter kit with an enhanced surface area filter and cage, for an electric power vacuum cleaner, the filter is a self-cleaning, flexible interlocking fabric having a rest position at atmospheric pressure, and a stretched position when under vacuum of a vacuum cleaner, the fabric having at least enough stretchability to increase its surface area by at least 10% in its stretched position from its rest position. When the vacuum cleaner is operating, the filter is in its stretched position and collects dust and debris, and when the vacuum cleaner is off, the filter relaxes, returns to its rest position and its surface area contracts to be self-cleaning, and a portion of the dust and debris to fall from the filter.