Vacuum Cleaner Filter Bag Inlet Deflection for Even Filter Cake
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Solution Overview
Problem
Existing vacuum cleaner filter bags face challenges in maintaining high suction power over a prolonged period due to clogging and reduced lifespan, despite various multi-layer structures and protective layers, which do not effectively distribute airflow and manage filter cake distribution.
Innovation Solution
A vacuum cleaner filter bag design incorporating a deflection device at the inlet opening and an air-permeable material layer with a non-connected part that allows airflow to flow below the material layer, distributing the filter cake more evenly and increasing the bag's lifespan by preventing direct impact on the inner side and allowing airflow through the material layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-layer structure with coarse and fine filter layers is used, then particle retention is improved, but the filter bag clogs faster reducing suction power
Solution Approach 1:
The patent introduces a temporal dimension to filtration by implementing a two-stage process: initial coarse filtration followed by fine filtration only when needed. The deflection device redirects airflow to bypass the fine filter layer during normal operation, and only engages it when the coarse layer becomes saturated, thus maintaining suction power while ensuring particle retention.
Solution Approach 2:
The deflection device acts as an intermediary mechanism that controls airflow distribution between the coarse and fine filter layers. It mediates the transition from coarse-only filtration to combined filtration based on the saturation state of the coarse layer, optimizing the use of both filter layers to maintain productivity while ensuring reliability.
2Productivity
If the filter bag operates for a prolonged period, then productivity is maintained, but the filter material becomes clogged reducing lifetime
Solution Approach 1:
The patent implements preliminary action by pre-positioning the deflection device to automatically redirect airflow before the fine filter layer becomes clogged. The coarse filter layer serves as a preliminary filtration stage that captures particles first, extending the operating period before the fine filter layer needs to engage, thus maintaining productivity while preserving filter effectiveness.
Solution Approach 2:
The system effectively discards the coarse filter layer's capacity first, allowing it to become saturated and then redirecting airflow to the fine filter layer. This staged utilization maximizes the operating period by fully exploiting the coarse layer's particle capture ability before engaging the finer, more vulnerable filter material.
3Reliability
If a protective layer is added to prevent bag damage, then reliability is improved, but device complexity increases
Solution Approach 1:
The deflection device serves multiple functions simultaneously: it protects the fine filter layer from particle impact damage, controls airflow distribution between filter layers, and extends the operating period. By combining protection and flow control functions in a single device, the patent improves reliability without proportionally increasing structural complexity.
Solution Approach 2:
The deflection device acts as a protective intermediary between particles and the fine filter layer, absorbing the impact of high-speed particles before they can damage the vulnerable fine filter material. This intermediary structure provides protection while maintaining overall system simplicity through its integrated design.
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 combination of a deflection device and a non-connected part of the material layer significantly enhances the vacuum cleaner filter bag's lifespan by improving airflow distribution and reducing clogging, allowing for prolonged high suction power operation.
Implementation Method 1
a deflection device (2) which is arranged in the interior of the vacuum cleaner filter bag (1) in the area of the inlet opening (3) and which is implemented such that an air current flowing in through the inlet opening (3) can be deflected by the deflection device (2)
Implementation Method 2
an air-permeable material layer (4) which is arranged in the interior of the vacuum cleaner filter bag (1), which is connected to said vacuum cleaner filter bag (1) at least one point, and which includes at least one part that is not connected to the vacuum cleaner filter bag (1) and that includes part of the boundary of the material layer (4)
Data Source
AI summary
A vacuum cleaner filter bag with an inlet opening including a deflection device and an air-permeable material is provided. The deflection device is arranged in the interior of the vacuum cleaner filter bag in the area of the inlet opening and which is implemented such that an air current flowing in through the inlet opening can be deflected by the deflection device. The air-permeable material layer is arranged in the interior of the vacuum cleaner filter bag, is connected to the vacuum cleaner filter bag at least one point, and includes at least one part that is not connected to the vacuum cleaner filter bag and that includes part of the boundary of the material layer.