Block-Bottom Vacuum Bag Diffuser for Inlet Blockage Prevention
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Solution Overview
Problem
Existing vacuum cleaner bags suffer from inadequate dust distribution, leading to premature blocking and reduced dust storage capacity and service life due to inadequate air flow management.
Innovation Solution
A block bottom bag with at least one diffuser made of material strips and/or flat structures featuring elongated flow openings, which are connected to the bag wall and designed to swirl incoming air laden with dirt and dust particles, preventing blockages and enhancing dust storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a small deflection device is attached directly below the inlet opening to redirect air flow, then air flow redirection is achieved, but the bag becomes blocked by dust accumulated between the inlet opening and the deflection device
Solution Approach 1:
The patent transitions from a two-dimensional flat deflection device to a three-dimensional conical diffuser structure that extends deeper into the bag interior. This dimensional change creates additional flow paths and prevents dust accumulation by maintaining air flow velocity throughout the inlet area, thereby resolving the blockage issue while preserving flow redirection functionality
Solution Approach 2:
The conical diffuser is positioned to begin immediately at the inlet opening and extend inward, creating a preliminary flow distribution structure before dust can accumulate. This preliminary action of guiding air flow from the start prevents the formation of stagnant zones where dust would otherwise accumulate and cause blockages
2Device complexity
If the deflection device area is limited to less than 10% of the bag surface, then device simplicity is maintained, but dust storage capacity is reduced due to premature blocking
Solution Approach 1:
The patent increases the effective surface area of the flow distribution structure by extending it in the third dimension (depth into the bag) rather than expanding it laterally. The conical shape provides a gradual expansion that increases interaction area with incoming air and dust particles without requiring a large footprint on the bag surface, thus maintaining simplicity while increasing dust storage capacity
Solution Approach 2:
The conical diffuser can be implemented as a separate insert component that is introduced into the bag rather than being integrated into the bag wall itself. This segmentation allows the flow distribution function to be added without redesigning the entire bag structure, maintaining device simplicity while enhancing dust storage capacity through improved flow management
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 diffuser design significantly extends the service life of the vacuum cleaner bag by improving dust storage capacity and preventing blockages at the air inlet, ensuring effective air flow and dust management.
Implementation Method 1
designed to swirl incoming air laden with dirt and dust particles
Data Source
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AI summary
Block-bottom bag (1) for vacuum cleaners, which has at least one diffuser (8) made of material strips and/or flat structures with elongated flow openings in its interior. Bags (1) of this type are characterized by excellent dust storage capacity and an increase in service life.