Filter bag for a vacuum cleaner
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Solution Overview
Problem
Existing filter bags for vacuum cleaners have low moisture absorption capacity, contribute to environmental harm, and lead to raw material shortages and allergic reactions due to the use of non-renewable materials like petroleum-based plastics and cellulose fibers from wood.
Innovation Solution
A filter bag with a wall made from at least one layer of air-permeable material derived from renewable resources, such as fast-growing plants, which reduces carbon dioxide emissions and material shortages, and includes a combination of renewable and recycled plastic fibers for improved durability and ecological balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If plastic fibers from petroleum are used, then durability is improved, but environmental harm increases and raw material scarcity worsens
Solution Approach 1:
The patent changes the material source parameter from petroleum-based plastic to plant-based renewable materials (grass, cereals, sugar cane). This parameter change maintains the structural integrity and durability requirements while eliminating the environmental harm and raw material scarcity issues associated with petroleum extraction and plastic production.
Solution Approach 2:
The patent uses composite materials by combining plant-based fibers (from grass, cereals, or sugar cane) with binding agents to create a nonwoven fabric that achieves both durability and environmental sustainability. The composite structure allows the material to maintain mechanical strength while being biodegradable and renewable.
2Reliability
If cellulose fibers from wood are used, then filtering performance is achieved, but land use increases and regrowth time is slow
Solution Approach 1:
The patent changes the plant source parameter from slow-growing wood to fast-growing plants (grass, cereals, sugar cane with growth rates of 0.01-0.75m per 24 hours). This parameter change dramatically improves the regrowth rate and reduces land use requirements while maintaining the cellulose content necessary for effective dust filtration.
3Ease of manufacture
If conventional materials are used, then manufacturing simplicity is maintained, but moisture absorption capacity is low
Solution Approach 1:
The patent changes the material composition parameter by using plant-based fibers (grass, cereals, sugar cane) that naturally possess higher moisture absorption capacity compared to conventional plastic fibers. The manufacturing process remains simple through the use of nonwoven fabric technology with binding agents, maintaining ease of production while significantly improving moisture absorption properties.
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 filter bag exhibits enhanced moisture absorption, reduced allergic reactions, and a more sustainable ecological footprint, with improved filtering performance and extended service life.
Implementation Method 1
the filter bag exhibits enhanced moisture absorption
Implementation Method 2
allowing the dust to be contained within the interior of the vacuum cleaner bag while the vacuum cleaner's airflow can pass through the bag wall
Data Source
AI summary
A vacuum cleaner filter bag has a wall that encloses an interior space and has an inlet opening, the wall comprising at least one layer of at least one air-permeable material. According to the invention, the at least one air-permeable material comprises fibers obtained from at least one renewable raw material, thereby improving the environmental footprint of the filter bag's production.