Circumferential Filter Seal for Multi-Stage Airflow Tightness
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Solution Overview
Problem
Existing air filters with multiple levels require complex and material-intensive sealing solutions to ensure tightness and efficient filtration, which can be difficult to assemble safely and efficiently.
Innovation Solution
A filter design featuring a sealing element that connects the first and second filter elements, providing an all-round sealing surface that matches the filter intake, ensuring secure sealing between the filter elements and the intake.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional seals are used to ensure leak-tight connection between filter elements and filter housing, then sealing reliability is improved, but device complexity and material consumption increase
Solution Approach 1:
The sealing element is integrally connected to the second filter element, combining the sealing function with the filter element structure itself. This eliminates the need for separate additional seals while maintaining leak-tight connection between the first and second filter elements and between the second filter element and filter housing.
Solution Approach 2:
The sealing element serves multiple functions: it provides sealing between the first filter element and second filter element, sealing between the second filter element and filter housing, and structural support for mounting the first filter element. This multi-functionality reduces overall device complexity while maintaining sealing reliability.
2Reliability
If additional seals are used to ensure leak-tight connection, then sealing reliability is improved, but material consumption increases
Solution Approach 1:
The sealing element is integrally connected to the second filter element, combining the sealing function with the filter element structure itself. This eliminates the need for separate additional seals while maintaining leak-tight connection between the first and second filter elements and between the second filter element and filter housing.
3Reliability
If complex sealing solutions are used to ensure tightness, then sealing reliability is improved, but ease of assembly deteriorates
Solution Approach 1:
The sealing element is integrally connected to the second filter element, combining the sealing function with the filter element structure itself. This eliminates the need for separate additional seals while maintaining leak-tight connection between the first and second filter elements and between the second filter element and filter housing.
Solution Approach 2:
The sealing element is pre-integrally connected to the second filter element during manufacturing, so that during assembly only the filter elements need to be mounted without handling separate sealing components. This preliminary integration significantly simplifies the assembly process while ensuring reliable sealing.
4Reliability
If separate sealing solutions are used for each filter element connection, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The sealing element serves multiple functions: it provides sealing between the first filter element and second filter element, sealing between the second filter element and filter housing, and structural support for mounting the first filter element. This multi-functionality reduces overall device complexity while maintaining sealing reliability.
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3
AI summary
The invention relates to a filter (10) for cleaning an airflow (L) comprising at least one first filter element (1) for a first filter stage and a second filter element (2) for a second filter stage, wherein the second filter element (2) is provided with a circumferential sealing element (3) and the sealing element (3) is bonded to the second filter element (2). According to the invention, the sealing element (3) has an outer circumferential sealing surface (4) for sealing against a filter holder (20) and an inner circumferential sealing surface (5) for sealing against the first filter element (1). Advantageously, a single sealing element can be used to seal the first filter element against the second filter element and the second filter element against the filter holder (20). The invention also relates to a filter arrangement (100) comprising a filter as described above and a filter holder for receiving the filter.