Filtration Filter with Dynamic Stress Relief Frame
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Solution Overview
Problem
The existing cell trapping system's filter breaks due to stress when fluid passes through it, as it is held in a tensioned state.
Innovation Solution
A filtration filter design where the porous film is held in a non-tensioned state by a frame that allows the central film portion to move relative to the flat plane while the outer edge portion moves in the opposite direction, reducing stress through a recess or projection system, preventing the filter from being bent excessively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter is held in a tensioned state, then the filter maintains a flat plane configuration for ease of handling, but the filter breaks due to stress when fluid passes through it
Solution Approach 1:
The frame is designed to allow dynamic movement of the porous film from a flat plane state (when not in use) to a bent state (when fluid passes through). The frame holds the outer edge portion while allowing the central film portion to move in the flow direction, transforming the static tensioned structure into a dynamic one that adapts to operational conditions and reduces stress concentration.
2Stability of the object's composition
If the filter is held in a tensioned state, then the filter remains flat and stable, but excessive stress causes breakage during fluid passage
Solution Approach 1:
The porous film is divided into two functional regions: the outer edge portion held by the frame and the central film portion that moves freely. This segmentation allows the outer region to maintain stability while the central region absorbs stress through movement, preventing breakage during fluid passage.
Solution Approach 2:
The frame structure changes the physical state of the porous film from a continuously tensioned flat plane to a segmented configuration where the central portion can change its position and orientation. This parameter change allows the film to transition between stable (flat) and stress-relieved (bent) states.
Data Source
AI summary
A filtration filter comprises a porous film including a central film portion having a plurality of through holes and an outer edge portion adjacent to the central film portion. The porous film portion lies in a flat plane in the absence of a force being applied to the central portion of the central film portion. A frame holds the outer edge portion of the porous film in such a manner that when a force is applied to the central film portion in a first direction, the central film portion moves in the first direction relative to the flat plane and the outer edge portion moves in a second direction, opposite to the first direction, relative to the flat plane. In this way stresses applied to the porous film during a filtering operation are reduced.