Vacuum Filter Bag Air Deflection for Longer Suction Life
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Solution Overview
Problem
Vacuum cleaner filter bags face challenges in maintaining high suction performance over a long period due to blockage of filter material, which reduces their serviceable life.
Innovation Solution
A vacuum cleaner filter bag design featuring a deflecting strip and a material strip with a spacing mechanism that allows air to flow around the material strip, preventing direct impact and promoting dust distribution, thereby maintaining suction power and extending the filter's serviceable life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a conventional filter bag design is used, then the structure is simple, but the serviceable life is limited due to filter blockage and suction performance degradation
Solution Approach 1:
The filter bag interior is segmented into multiple functional zones using the deflecting strip and material strip. The deflecting strip divides the incoming air flow into different directions, while the material strip creates a spacing region. This segmentation allows different areas to perform different functions (deflection, spacing, filtration), reducing overall blockage and extending serviceable life without requiring complete redesign of the filter bag structure.
Solution Approach 2:
The material strip acts as an intermediary element between the inlet opening and the bag wall. It creates a spacing region that prevents direct contact between the air flow and the bag wall, allowing air to flow to the side of the material strip. This intermediary structure distributes dust more evenly and reduces loading on the bag wall, extending filter life while maintaining a relatively simple overall structure.
2Productivity
If the material strip is fully connected to the bag wall, then structural stability is high, but air flow is blocked and suction performance decreases
Solution Approach 1:
The material strip is designed with non-uniform connection to the bag wall - connected at certain locations but spaced at other locations. This local variation in connection quality allows the structure to maintain stability where needed while permitting air flow and dust distribution where required. The spacing means creates localized gaps that enable air to pass through while the connected portions maintain structural integrity.
Solution Approach 2:
The material strip is designed to be movable rather than rigidly fixed, allowing it to move dynamically with the air flow. This dynamic configuration enables the strip to adapt to varying flow conditions, maintaining structural stability when needed while allowing air flow and dust distribution when required, thus balancing productivity and structural stability.
3Manufacturing precision
If the deflecting strip deflects air flow strongly, then dust distribution is improved, but the material strip may become overloaded
Solution Approach 1:
The deflecting strip is designed to deflect air flow partially rather than completely changing its direction. This partial deflection is sufficient to improve dust distribution uniformity by directing some air flow to the sides, but not so strong as to overload the material strip. The spacing means further distributes the load by providing additional flow paths, allowing effective dust distribution while preventing excessive loading on any single component.
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 design ensures high suction power over a long period by evenly distributing dust and reducing the loading on the bag walls, resulting in a more uniform filter cake and extended filter life.
Implementation Method 1
a deflecting strip for deflecting an air flow entering through the inlet opening
Implementation Method 2
a spacing means which is configured such that the material strip is at a spacing at least partially from the bag wall during operation of the vacuum cleaner filter bag
Implementation Method 3
The material strip hence is moved in the air flow, which results in an advantageous distribution of the dust in the bag interior
Data Source
AI summary
A vacuum cleaner filter bag includes (a) a bag wall made of filter material, an inlet opening being provided in the bag wall, (b) a deflecting strip for deflecting an air flow entering through the inlet opening, the deflecting strip being disposed in the interior of the vacuum cleaner filter bag, (c) a material strip which is disposed in the interior of the vacuum cleaner filter bag and connected to the bag wall, at least a part of the edge of the material strip not being connected to the bag wall, and (d) a spacing means which is configured such that the material strip is at a spacing at least partially from the bag wall during operation of the vacuum cleaner filter bag.