Vacuum cleaner filter bag for an upright vacuum cleaner
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Solution Overview
Problem
Non-woven flat filter bags for upright vacuum cleaners often fail to fully unfold, leading to kinking and reduced dust storage capacity, which results in clogged filters and a shorter service life due to incomplete expansion and uneven dust distribution.
Innovation Solution
A vacuum cleaner filter bag with a length-to-width ratio greater than 1.5, featuring a first bag wall with longitudinal folds and a retaining plate on the opposite second bag wall, allowing for complete unfolding and increased filtration area by integrating folds that enhance flexibility and prevent kinking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat non-woven filter bag is used for upright vacuum cleaners, then the filter bag can be easily manufactured and installed, but it fails to fully unfold leading to kinking and reduced dust storage capacity
Solution Approach 1:
The filter bag incorporates dynamic folding structures that allow it to transition from a compact flat state during storage and installation to a fully expanded three-dimensional state during operation. The folds are designed to unfold automatically when the bag is inserted into the vacuum cleaner, enabling the filter surface to expand completely without manual intervention while maintaining manufacturing simplicity.
Solution Approach 2:
The filter bag is designed with nested folding patterns where multiple layers of the filter material are folded into each other in a compact configuration for storage. When installed, these nested folds unfold sequentially, allowing the filter bag to expand from a small flat package to a large three-dimensional structure that maximizes dust storage capacity and prevents kinking.
2Ease of operation
If a flat non-woven filter bag is inserted into the upright vacuum cleaner, then installation is simple, but the filter bag does not unfold completely causing kinks and uneven dust distribution
Solution Approach 1:
The filter bag is pre-folded into a specific compact configuration that guides its unfolding process during installation. The fold patterns are designed in advance to ensure that when the bag is inserted into the vacuum cleaner, it automatically unfolds into the correct three-dimensional shape without requiring manual adjustment, thereby achieving both easy installation and complete unfolding.
Solution Approach 2:
The folding structure incorporates dynamic elements that respond to the insertion process itself. As the filter bag is pushed into the vacuum cleaner housing, the folds are designed to unfold progressively in response to the mechanical action of insertion, ensuring complete expansion without kinks while maintaining simple installation procedures.
3Volume of stationary object
If the filter bag volume is increased to improve dust storage capacity, then more dust can be collected, but the filter bag cannot be fully deployed in the available space leading to clogging
Solution Approach 1:
The filter bag uses nested folding patterns that allow a large-volume three-dimensional structure to be compressed into a compact flat form for storage and installation. The nested folds are arranged so that when the bag is installed, they unfold in a controlled sequence, enabling the filter bag to achieve its full dust storage capacity volume without difficulty during deployment.
Solution Approach 2:
The invention transitions the filter bag from a two-dimensional flat configuration to a three-dimensional expanded structure through carefully designed fold patterns. This dimensional transformation allows the filter bag to maximize its dust storage capacity in the vertical and lateral dimensions while maintaining a compact profile during installation, preventing clogging by ensuring complete deployment.
4Area of stationary object
If folds are added to increase filter surface area, then filtration capacity improves, but the bag structure becomes more complex affecting production
Solution Approach 1:
The filter bag surface is divided into multiple folded sections that can be manufactured separately and then assembled. Each fold segment is designed to be a simple repetitive unit, which increases the total filter surface area while keeping individual manufacturing steps relatively simple. The segmented structure allows for modular production that balances surface area expansion with manufacturing complexity.
Solution Approach 2:
The folds are designed as dynamic elements that are flat and compact during manufacturing and storage, then expand into three-dimensional structures during installation. This dynamic behavior allows the filter bag to achieve large surface area with simple flat patterns during production, reducing manufacturing complexity while still providing extensive filtration surface area when deployed.
Data Source
AI summary
The present invention relates to a vacuum cleaner filter bag for an upright vacuum cleaner. The vacuum cleaner filter bag according to the invention has a greater length than width, resulting in a long side and a narrow side. It is formed by two bag walls that are connected to one another all the way around, so that an interior space is formed between the two bag walls. A bag wall has an inlet opening through which the air to be cleaned can flow into the vacuum cleaner filter bag. The vacuum cleaner filter bag according to the invention is characterized in that the bag wall in which the inlet opening is made is opposite a bag wall which has a fold extending in the longitudinal direction of the vacuum cleaner filter bag. The fold gives this bag wall increased flexibility, whereby the vacuum cleaner filter bag can be opened completely, for example, when it is inserted or by an air flow entering through the inlet opening for the first time, since the air can flow into the filter bag essentially unhindered.