Filter assembly for reducing noise for a vacuum cleaner
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Solution Overview
Problem
Existing vacuum cleaners fail to effectively reduce noise while maintaining suction performance, with previous noise reduction methods either increasing energy consumption or limiting filter performance.
Innovation Solution
A filter arrangement with multiple filter areas of differing properties, arranged in a flat design with plane-parallel inflow and outflow surfaces to optimize noise reduction and suction power, using materials with specific flow resistance and sound-insulating effects to adapt to the airflow and noise frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single uniform filter arrangement is used, then the structure is simple, but noise reduction effectiveness is limited
Solution Approach 1:
The filter arrangement is divided into multiple filter areas (first filter area, second filter area, third filter area) with different properties. Each filter area handles different aspects of noise reduction and airflow, allowing the system to reduce noise more effectively without requiring a completely complex new structure.
Solution Approach 2:
Different filter areas are assigned different properties: the first filter area has specific flow resistance characteristics, the second filter area has sound-insulating effects, and the third filter area has different flow resistance. This local differentiation allows each region to optimize for its specific function while maintaining overall system simplicity.
2Object-affected harmful factors
If airtight material layers are added to improve air distribution, then noise reduction improves, but flow area decreases and energy consumption increases
Solution Approach 1:
The filter arrangement uses air-permeable filter areas instead of airtight material layers. The porous structure of the filters allows air to pass through while still achieving noise reduction, avoiding the energy consumption penalty associated with airtight barriers that restrict airflow and require higher motor power.
Solution Approach 2:
The invention extracts the sound-insulating function from the airflow path by using sound-absorbing materials in the filter areas, rather than using airtight barriers that block both sound and air flow. This separates the noise reduction function from the airflow restriction problem.
3Object-affected harmful factors
If filter areas with different properties are used, then noise reduction and suction performance are optimized, but manufacturing complexity increases
Solution Approach 1:
Multiple filter areas with different properties are merged into a single integrated filter arrangement that can be installed as one unit. This combining approach achieves the noise reduction benefits of differentiated filter zones while maintaining manufacturing simplicity through a unified structure.
Solution Approach 2:
The filter arrangement serves multiple functions simultaneously: the first filter area handles primary filtration and noise reduction, the second filter area provides additional sound insulation, and the third filter area manages airflow distribution. This multi-functionality is achieved within a single manufacturable component rather than requiring multiple separate parts.
4Volume of moving object
If the filter arrangement is made compact, then space is saved, but airflow homogeneity may be compromised
Solution Approach 1:
The filter arrangement uses a planar, two-dimensional configuration with plane-parallel inflow and outflow surfaces. This dimensional approach allows the filter to maintain a compact volume while still providing sufficient path length for airflow homogenization through the different filter areas, achieving both compactness and airflow stability.
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
Significantly reduces noise emissions without compromising suction performance, improving user-friendliness and energy efficiency by utilizing a targeted combination of filter materials and geometries to minimize turbulence and maximize airflow homogeneity.
Implementation Method 1
an air-permeable and sound-absorbing foam filter
Implementation Method 2
addresses noise pollution caused by diffuse air turbulence or turbulent flow conditions
Data Source
Figure 1~2
Figure 3a~3e
AI summary
The present invention relates to a filter arrangement (10) for noise reduction for a vacuum cleaner, comprising a first filter area (1) of a filter which differs from at least one further filter area (2, 3, 4, 5) by at least one predetermined property, wherein the first filter area (1) and the at least one further filter area (2, 3, 4, 5) partially overlap and/or at least partially enclose each other, such that the filter areas (1, 2, 3, 4, 5) form a regular inlet area (6) and a regular outlet area (7) parallel to the inlet area (6) for air flowing through the filter arrangement, wherein the first filter area (1) and the at least one further filter area (2, 3, 4, 5) define adjacent air-permeable partial areas on the inlet area (6) and/or on the outlet area (7).which have different, predetermined properties. By a targeted combination of properties and/or an arrangement of filter areas (1, 2, 3, 4, 5), the filter arrangement (10) can be optimally adapted to the user's needs, specifically to the noise to be dampened and/or the required cleaning and/or suction performance. Furthermore, the invention relates to a vacuum cleaner equipped with such a filter arrangement (10).