Folded Vacuum Cleaner Filter Bag for Full Unfolding and Airflow
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Solution Overview
Problem
Vacuum cleaner filter bags made of non-woven fabrics often do not fully unfold in the installation space, leading to reduced filtration efficiency and shorter service life due to insufficient dust storage capacity and increased pressure loss.
Innovation Solution
The filter bag design includes a fold towards the top of the first side wall with the holding plate, allowing for improved unfolding and increased dust storage capacity by folding the first and second side walls together in a direction towards the top, and further folds away from the top, optimizing the bag's layout for better airflow and dust retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the filter bag is folded for packaging with all folds pointing away from the outside of the bag wall, then packaging material is saved, but the filter bag cannot fully unfold in the installation space, reducing filtration efficiency and service life
Solution Approach 1:
The patent inverts the conventional folding direction by making at least one fold point toward the outside of the bag wall instead of away from it. This allows the filter bag to unfold more completely in the installation space, ensuring all areas of the side walls are evenly traversed by the airflow, thereby maintaining filtration efficiency and service life while still achieving compact packaging.
2Volume of stationary object
If the filter bag is folded for packaging, then packaging space is reduced, but the dust storage capacity is insufficient, reducing service life due to quick pressure loss increase
Solution Approach 1:
By inverting the fold direction to point toward the outside of the bag wall, the filter bag achieves optimal unfolding in the installation space, maximizing the available volume for dust particle storage. This ensures the bag can hold sufficient dust before pressure loss increases, extending service life.
Solution Approach 2:
The patent optimizes the three-dimensional configuration of the filter bag by strategically positioning folds at specific locations and orientations. This dimensional optimization allows the bag to achieve both compact packaging and maximum dust storage capacity when installed, as the folds are designed to unfold into an optimal spatial arrangement for dust accumulation.
3Ease of manufacture
If the filter bag is folded for packaging, then packaging is more efficient, but the airflow cannot evenly traverse all areas of the side walls, reducing filtration efficiency
Solution Approach 1:
The patent resolves this contradiction by inverting the fold direction to point toward the outside of the bag wall. This ensures that when the bag is installed, the airflow can evenly traverse all areas of the side walls, maintaining high filtration efficiency. The same fold configuration still achieves compact packaging, thus preserving packaging efficiency.
Data Source
Figure 1a~1b
Figure 2a~2b
AI summary
The bag (1) has a bag wall comprising two side walls (2, 6), and a holding plate (4) arranged on one of the side walls. The bag wall comprises a folding part, and the side walls are commonly arranged by the folding part along a direction toward an upper side of the former side wall. The bag wall comprises another folding part, where the side walls are commonly arranged by the latter folding part along a direction away from the upper side of the former side wall. The former folding part runs perpendicular to side edges, and the latter folding part runs parallel to the side edges. An independent claim is also included for a method for folding a vacuum cleaner filter bag.