Vacuum Filter Element with Deflecting Surface for Cake Removal
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Solution Overview
Problem
Existing filter elements for vacuum cleaners suffer from material adherence to the filter body, leading to clogging and reduced vacuum performance due to inadequate cleaning of the filter cake, especially in the lower region, where air flow momentum is weakened by existing designs.
Innovation Solution
A deflecting surface within the clean air space directs the air flow directly onto the filter body, reducing the path length and ensuring greater momentum, particularly in the lower region, by deflecting the air flow and creating separate subspaces that enhance cleaning effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the clean air space is designed with a conventional structure without deflecting surfaces, then the structure is simple and easy to manufacture, but the air flow momentum is weakened in the lower region, leading to insufficient cleaning of filter cake
Solution Approach 1:
The clean air space is divided into multiple subspaces by deflecting surfaces, creating separate flow paths that direct air flow to different regions of the filter body. This segmentation ensures that the lower region receives sufficient high-momentum air flow for effective filter cake removal, while maintaining a manageable structural complexity through modular deflecting surface elements.
Solution Approach 2:
Deflecting surfaces are introduced to change the three-dimensional flow path of the air within the clean air space. These surfaces redirect the air flow from a predominantly vertical path to include horizontal and angled components, ensuring that high-momentum air reaches the lower region of the filter body that would otherwise be poorly served by conventional vertical flow patterns.
2Ease of operation
If the air flow path through the clean air space is long, then the air flow can distribute evenly, but the momentum is lost before reaching the filter body, reducing cleaning effectiveness
Solution Approach 1:
Deflecting surfaces are strategically positioned to redirect air flow toward the lower region of the filter body before the air loses significant momentum. This preliminary redirection ensures that high-momentum air flow reaches the critical lower cleaning zones, preventing the momentum loss that would occur in conventional long-path designs.
Solution Approach 2:
By introducing deflecting surfaces that create angled and horizontal flow paths, the air flow reaches different regions of the filter body more directly. This dimensional change in flow path geometry reduces the effective travel distance and maintains higher momentum upon impact with the filter cake in the lower region.
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 solution effectively cleans the filter element more thoroughly, maintaining higher air flow momentum and preventing filter cake adherence, thereby improving vacuum performance and reducing clogging issues across the filter element.
Implementation Method 1
a deflecting surface which extends in the direction of the lower side of the filter element is arranged in the clean air space below the conveying opening. The deflecting surface is configured to deflect an air flow which is introduced through the conveying opening in the direction of the wall of the clean air space.
Implementation Method 2
the air flow can be conducted deliberately and on a direct path to the filter body. As a result, the air which is situated in the clean air space is damped to a considerably lesser extent in flushing operation, in particular in the lower region of the filter element, before it impinges on the filter body. It can be ensured as a result that, in the case of the cleaning of the filter element, the air flow impinges on the wall with a considerably greater momentum.
Data Source
AI summary
The subject matter of the invention is a filter element (13) for insertion into a vacuum cleaner, with an upper side (14), a lower side (15) which lies opposite the upper side (14), a filter body (19) which extends from the upper side (14) to the lower side (15) and which forms a wall (26) of a clean air space which is situated between the upper side and the lower side, and with a conveying opening (17) which is arranged on the upper side (14), opens into the clean air space, and through which an air flow which is driven by way of the vacuum cleaner can be conveyed. According to the invention, a deflecting surface (20) which extends in the direction of the lower side (15) is arranged in the clean air space below the conveying opening (17), which deflecting surface (20) is configured to deflect an air flow which is introduced through the conveying opening (17) in the direction of the wall (26) of the clean air space. The filter element (13) according to the invention can be relieved of filter cakes in a simple and effective way.