Filter element
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Solution Overview
Problem
Existing filter elements in vacuum cleaners suffer from reduced suction power due to filter cake accumulation, which is not effectively cleaned, especially in the lower areas, as the air flow is dampened by existing designs, leading to incomplete cleaning and reduced suction efficiency.
Innovation Solution
A filter element with a deflection surface in the clean air space that directs the air flow towards the filter body, reducing the path length and maintaining impulse, especially in the lower areas, to ensure thorough cleaning and detachment of filter cake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air flow is allowed to pass through the clean air space to reach the filter body, then the filter body can be cleaned, but the air flow impulse is dampened especially in lower areas leading to insufficient cleaning
Solution Approach 1:
The deflection surface redirects the air flow from a vertical downward path to a horizontal path along the filter body wall, changing the dimension of flow direction. This ensures the air flow reaches all areas of the filter body including lower sections with sufficient impulse, solving the dampening problem while maintaining cleaning effectiveness throughout the entire filter surface.
Solution Approach 2:
The deflection surface creates localized high-velocity air flow regions directly against the filter body wall, concentrating the cleaning action where it is most needed. By deflecting air flow horizontally along the wall, the impulse is maintained locally rather than being dissipated through the entire clean air space volume, ensuring effective cleaning even in lower areas.
2Device complexity
If the clean air space volume is large, then the filter element structure is simple, but the air flow is dampened before reaching the filter body
Solution Approach 1:
Instead of reducing the clean air space volume, the deflection surface redirects air flow into a horizontal dimension along the filter body wall. This maintains the simple structural design with adequate clean air space while ensuring effective cleaning by changing the flow path direction rather than compressing the space.
Solution Approach 2:
The deflection surface acts as an intermediary element that guides the air flow from the conveying opening to the filter body wall. This simple structural addition mediates between the large clean air space and the filter body, ensuring the air flow reaches the filtering surface with sufficient impulse without requiring space reduction.
3Device complexity
If air flow path length is long, then the filter element can be simple in design, but the suction material is not effectively detached from the filter body
Solution Approach 1:
The deflection surface creates a horizontal flow path along the filter body wall, changing from a long vertical path to a shorter horizontal path. This reduces the effective path length while maintaining design simplicity, ensuring the air flow maintains sufficient velocity to detach suction material from the filter body surface.
Solution Approach 2:
The deflection surface changes the flow parameters by redirecting air flow horizontally along the wall, maintaining higher velocity over a shorter distance. This parameter change in flow direction and path length ensures effective suction material detachment without requiring complex multi-component designs.
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 surface enhances cleaning effectiveness by maintaining air flow impulse and ensuring complete detachment of filter cake, thereby improving suction power and efficiency.
Implementation Method 1
The deflection surface is designed to deflect an air flow introduced through the conveying opening in the direction of the wall of the clean air space
Implementation Method 2
When passing through the filter body, the air flow takes along suction material adhering to the outside of the filter body and cleans the filter body in this way
Implementation Method 3
the sucked material does not pass through the wall of the filter body, but is instead separated on it and preferably falls into a collection container due to the effect of gravity
Data Source
Figure 1~3
Figure 4~5
AI summary
The invention relates to a filter element (13) for insertion into a vacuum cleaner, comprising a top surface (14), a bottom surface (15) opposite the top surface (14), a filter body (19) extending from the top surface (14) to the bottom surface (15) and forming a wall (26) of a clean air chamber located between the top and bottom surfaces, and a conveying opening (17) arranged on the top surface (14) and opening into the clean air chamber, through which an airflow driven by the vacuum cleaner can be conveyed. According to the invention, a deflecting surface (20) extending towards the bottom surface (15) is arranged in the clean air chamber below the conveying opening (17), which is designed to deflect an airflow introduced through the conveying opening (17) towards the wall (26) of the clean air chamber. The filter element (13) according to the invention can be cleaned of filter cake in a simple and effective manner.