Flat Vacuum Cleaner Bag Diffusers for Dust Distribution
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Solution Overview
Problem
Existing vacuum cleaner filter bags suffer from inadequate dust distribution, leading to premature blockages and reduced dust storage capacity and lifespan due to insufficient airflow distribution at the inlet opening.
Innovation Solution
A flat vacuum cleaner filter bag with at least two diffusers made of strips or sheet materials featuring oblong-shaped flow openings, mounted on the bag walls, creating turbulence in incoming air and dust particles, thereby preventing blockages and enhancing dust storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a small deflection device is fitted directly below the inlet opening, then the airflow is deflected at the inlet region, but the bag becomes blocked due to dust accumulating between the inlet opening and the deflection device
Solution Approach 1:
The diffuser is divided into multiple diffuser elements arranged in at least two rows, with each row containing multiple diffuser elements. This segmentation allows airflow to be distributed across multiple paths, preventing dust accumulation in a single location and eliminating blockages while maintaining effective airflow deflection.
Solution Approach 2:
The diffuser elements are arranged in multiple rows extending in the airflow direction, creating a multi-dimensional distribution pattern. This spatial arrangement distributes dust particles across a larger volume, preventing concentration and blockage at any single point while maintaining effective airflow management.
2Reliability
If the diffuser area is increased to improve dust distribution, then blockage prevention is enhanced, but the bag surface area available for dust storage is reduced
Solution Approach 1:
The diffuser elements are designed with specific local characteristics - each element has a defined size, shape, and spacing optimized for its position. The multi-row arrangement allows different regions of the bag to have appropriate diffuser coverage, preventing blockages at critical areas while preserving maximum surface area for dust storage across the entire bag.
Solution Approach 2:
Rather than providing complete coverage with a single large diffuser, the invention uses multiple partial diffuser elements arranged in rows. This partial action approach provides sufficient airflow distribution and blockage prevention without occupying excessive bag surface area, achieving the optimal balance between protection and storage capacity.
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 significantly extends the lifespan of the filter bag by improving dust distribution and preventing blockages at the inlet opening, resulting in enhanced dust storage capacity and reduced pressure loss during operation.
Implementation Method 1
The diffusers are mounted on the bag wall at least on one side, with the proviso that the diffusers in the form of sheet materials with oblong-shaped flow openings which are disposed in the first plane in the region of the inlet opening and are mounted on the bag upper side on both sides and which have an area of at least 10%, relative to the total bag surface, cause turbulence of the inflowing air which is laden with dirt and/or dust particles
Data Source
AI summary
A flat bag for vacuum cleaners includes, in the interior thereof, at least two diffusers made of strips of material and/or sheet materials with oblong-shaped flow openings. Such flat bags are distinguished by excellent dust storage capacity and extension of the useful life.