Vacuum Cleaner Filter Bag Folds With Wall Spacing Control
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Solution Overview
Problem
Filter bags with surface folds, which have a higher dust absorption capacity and separation efficiency, often cannot fully unfold within conventional vacuum cleaners, limiting their dust holding capacity.
Innovation Solution
A nonwoven filter bag design with surface folds and a filter bag wall connection device that adjusts to unfold optimally within the vacuum cleaner, utilizing distance limiting devices such as stitching threads or spacer fabrics to ensure proper deployment of the folds during suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If filter bags are designed with surface folds to increase dust absorption capacity, then dust holding capacity and separation efficiency are improved, but the filter bags cannot fully unfold within conventional vacuum cleaners
Solution Approach 1:
The filter bag is pre-assembled with surface folds in a compact flat configuration that fits within conventional vacuum cleaner storage spaces. The folds are pre-formed but designed to automatically unfold during operation when the vacuum cleaner is placed in the inclined position, eliminating the need for manual unfolding by the user.
Solution Approach 2:
The filter bag transitions from a static flat configuration during storage to a dynamic unfolded configuration during operation. The surface folds are designed to expand and unfold automatically when the vacuum cleaner is positioned at an incline, allowing the filter bag to adapt its shape based on operational conditions.
2Ease of manufacture
If filter bags are made as flat bags with surface folds, then manufacturing complexity is reduced, but the internal volume before use is essentially zero limiting dust capacity
Solution Approach 1:
The filter bag utilizes the third dimension by incorporating surface folds that extend outward from the flat bag surface. These folds increase the effective filter area and dust holding capacity without requiring a more complex 3D bag structure during manufacturing. The folds are integrated into the flat bag design, maintaining manufacturing simplicity while dramatically increasing functional capacity.
3Quantity of substance
If nonwoven fabric is used instead of paper, then dust absorption capacity and service life are improved, but the material is difficult to fold permanently
Solution Approach 1:
The nonwoven fabric filter bag is designed with dynamic surface folds that are not permanently creased like paper, but rather flexible folds that can expand and contract. The folds are formed in a way that maintains the resilience of the nonwoven material while creating the necessary geometric structure for increased dust capacity. The folds unfold automatically during operation rather than requiring permanent creasing during manufacturing.
Data Source
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AI summary
The filter bag is made of non-woven fabric, and is designed as disposable filter bag and flat bag having a first filter bag wall (32) and with a second filter bag wall. The surface wrinkles are formed in first filter bag wall. Each surface of fold areas is provided in surface of filter bag wall, such that portions protrude over surface of first filter bag wall. A filter bag wall connecting device such as distance-limiting device (35) is provided inside vacuum cleaner filter bag, to connect first filter bag wall in the region of the surface of fold, with second filter bag wall.