Vacuum Cleaner Filter Bag Deflection Structure for Even Particle Loading

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Solution Overview

Problem

Existing vacuum cleaner filter bags face challenges in maintaining excellent filter characteristics and extended service life due to clogging and damage from high-speed particle impact on the bag wall.

Innovation Solution

Incorporation of a deflection device at the inlet opening that deflects the air stream, ensuring even distribution of particles and reducing the impact on the bag wall, thereby enhancing filter cake uniformity and extending the service life.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of stationary object

If no deflection device is provided, then the structure is simple, but the filter cake distribution is uneven and service life is reduced

Engineering Contradiction:

Improveservice lifeVSAvoidstructure complexity

Core Design Contradiction:

Duration of action of stationary objectVSDevice complexity

Solution Approach 1:

A deflection device is introduced as an intermediary element between the air stream inlet and the bag wall. This device mediates the interaction by deflecting the air stream to distribute particles evenly, preventing direct high-speed impact on the bag wall and extending service life without requiring fundamental changes to the bag structure

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If particles are allowed to flow directly into the bag, then the filtering process is simple, but the bag wall is damaged by high-speed particle impact

Engineering Contradiction:

Improvebag wall integrityVSAvoidinlet structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The deflection device performs preliminary anti-action by intercepting and redirecting the air stream before particles can directly impact the bag wall. This preventive measure reduces particle velocity and redistributes them evenly, protecting the bag wall from damage before the harmful effect occurs

Inventive Principle:

Principle #9Preliminary anti-action

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 deflection device significantly increases the service life of the vacuum cleaner filter bag while maintaining excellent filter characteristics by evenly distributing the filter cake and reducing particle impact on the bag wall, leading to reduced clogging and improved performance.

Implementation Method 1

an air stream flowing through the inlet opening is deflected such that the entrained particles are evenly distributed in the interior of the bag

Methodology Applied

Scientific EffectFluid flow deflection:

Implementation Method 2

the filter cake formed in a filter bag considerably contributes to the filtering behavior of the filter bag

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Implementation Method 3

the particles entrained in the air stream do not strike in an unimpeded way and at a high speed against the bag wall opposite the inlet opening

Methodology Applied

Scientific EffectParticle velocity reduction:

Data Source

PatentUS8157879B2Vacuum cleaner filter bag with deflection device

Publication Date: 2012.04.17 EUROLIFTERS HLDG NV

AI summary

A vacuum cleaner filter bag with an inlet opening and a deflection device arranged in the area of the inlet opening, which is configured in such a way that an air stream flowing through the inlet opening can be deflected.