Filter Element With Clean Side Support For Gas Filtration
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Solution Overview
Problem
Existing filter elements for gas filtration, particularly in internal combustion engines, face challenges in stable accommodation within filter housings without impairing flow or cleaning performance, often requiring complex recess designs that affect filtration area and flow conditions.
Innovation Solution
A filter element with a pleated filter medium body and a support element located on the clean side, which is connected in a fixed or non-detachable manner, eliminating the need for a continuous recess between the dirty and clean sides, thereby enhancing filtration area and preventing flow disruptions, while using PUR foam for both the support element and seal to ensure stability and flow-tight separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous recess is formed in the filter medium body to fix the filter element in the filter housing, then the filter element can be stably integrated, but the filtration area is reduced and flow conditions are impaired
Solution Approach 1:
The support structure is segmented into two separate elements: a support element on the clean side and a counter-support element on the dirty side. This eliminates the need for a continuous recess through the filter medium body, as each support element only requires a localized recess on its respective side, thereby preserving most of the filtration area while achieving stable integration.
Solution Approach 2:
The support element acts as an intermediary component that transfers the mechanical load from the filter medium body to the filter housing. By introducing this intermediate support structure, the filter element achieves stable integration without requiring a continuous recess that would compromise the filtration area.
2Reliability
If a continuous recess is formed in the filter medium body, then the filter element can be fixed in the filter housing, but flow disruptions occur
Solution Approach 1:
The support structure is divided into two separate support elements positioned on opposite sides of the filter medium body. This segmentation allows each support element to provide localized stabilization without creating a continuous flow path disruption, thereby maintaining better flow conditions while ensuring the filter element remains fixed.
Solution Approach 2:
Instead of creating a single continuous recess through the filter medium body, the invention inverts the approach by creating two separate recesses on opposite sides, each housing a support element. This inverted structure reduces flow disruption by eliminating the continuous opening that would otherwise impede fluid flow.
3Stability of the object's composition
If the filter medium body is supported on the dirty side, then stability is achieved, but the filter medium body bulges towards the clean side when wet
Solution Approach 1:
The counter-support element on the dirty side acts as a counterweight that balances the forces acting on the filter medium body. When the filter medium becomes wet and expands, the counter-support element provides opposing support that prevents bulging towards the clean side, thereby maintaining both structural stability and proper shape.
Solution Approach 2:
The support and counter-support elements are pre-positioned on opposite sides of the filter medium body before operation. This preliminary action ensures that when the filter medium absorbs moisture and expands, the opposing support forces are already in place to prevent bulging, maintaining the structural integrity and shape throughout operation.
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
This design improves filtration efficiency, reduces manufacturing complexity, and ensures long-term stability under various operating conditions by preventing bulging of the filter medium body, even when wet, without adverse effects on flow conditions.
Implementation Method 1
the forces acting on the filter medium body by the flowing fluid
Implementation Method 2
a circumferential seal (3), which is arranged in the edge region of the filter medium body (2)
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a filter element comprising a filter medium body, on which is arranged a supporting element which is disposed on the filtered side of the filter medium body, the supporting element being separated from the unfiltered side by the material of the filter medium body.