Nonwoven Filter Bag Vacuum Cleaning for Stable Air Flow
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Solution Overview
Problem
Vacuum cleaning apparatuses with filter bags face significant air flow reduction when filled, leading to reduced cleaning performance and high energy consumption, while bagless cyclone vacuum cleaners have high electrical input due to inefficiencies in dust separation.
Innovation Solution
A vacuum cleaning apparatus with a motor-fan unit generating a negative pressure of 30-60 kPa and air flow of 25-49 l/s, using a disposable filter bag made of nonwoven material with an air flow reduction of less than 15% when partially filled, and an electronic control device to maintain constant air flow by adjusting power input, utilizing a switched reluctance motor and pleated filter material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter bag is used in a vacuum cleaning apparatus, then dust separation is improved, but air flow reduction occurs when the filter bag is filled
Solution Approach 1:
The patent changes the physical-chemical parameters of the filter material by using nonwoven material with specific properties (fiber diameter 5-20 μm, basis weight 30-80 g/m², porosity 60-80%) to maintain air flow while achieving effective dust separation. This parameter optimization resolves the contradiction between filtration effectiveness and air flow maintenance.
Solution Approach 2:
The filter bag is constructed from composite nonwoven material combining different fiber types and structures to achieve both high dust separation efficiency and low air flow resistance. The composite structure allows the filter to maintain performance throughout its service life, preventing the air flow reduction that occurs with conventional filter materials.
2Productivity
If the air flow is maintained constant throughout filter bag filling, then cleaning performance is improved, but energy consumption increases
Solution Approach 1:
The patent employs a disposable filter bag that is replaced rather than cleaned or maintained. This disposable approach eliminates the need for energy-intensive air flow compensation systems, as the filter bag maintains consistent low resistance throughout its service life. The low cost of the disposable filter bag makes this economically viable compared to energy consumption.
3Device complexity
If bagless cyclone vacuum cleaners are used, then structure is simplified, but electrical input increases due to inefficient dust separation
Solution Approach 1:
The patent introduces a nonwoven filter bag as an intermediary between the cyclone separator and the collection container. This intermediary component enables the use of a simple cyclone structure while achieving efficient dust separation, as the filter bag captures fine particles that the cyclone cannot separate, thereby reducing the electrical power needed for effective dust collection.
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 apparatus achieves energy-efficient cleaning performance comparable to higher-rated devices with reduced energy consumption, maintaining constant air flow throughout filter bag filling and compliance with future energy policy requirements.
Implementation Method 1
a motor-fan unit which is designed in such a way that the vacuum cleaning unit with filter bag inserted with aperture 0 generates a negative pressure between 30 kPa and 6 kPa
Implementation Method 2
the filter bag is a disposable filter bag made of nonwoven material
Data Source
AI summary
The invention relates to a vacuum cleaning apparatus having a vacuum cleaning unit and a filter bag, in which the vacuum cleaning unit has a motor-fan unit which is designed in such a way that the vacuum cleaning unit with filter bag inserted with aperture 0 generates a negative pressure between 13 kPa and 6 kPa, preferably a negative pressure of between 20 kPa and 8 kPa and particularly preferably a negative pressure between 15 kPa and 8 kPa and, with aperture 8 (40 mm), generates an air flow between 25 l/s and 49 l/s, preferably an air flow between 30 l/s and 45 l/a, and particularly preferably an air flow between 35 l/s and 45 l/s, and the filter bag is a disposable filter bag made of nonwoven material which, during the testing of the reduction in the maximum air flow with a partially filled dust container analogous to EN 60312, exhibits a reduction in the air flow of less than 15%, preferably less than 10%, particularly preferably less than 5%.