Pressure-Equalization Filter Layout for Toxic Air Containment
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Solution Overview
Problem
Current pressure equalization mechanisms in closed system transfer devices (CSTDs) for CMR drugs fail to reliably prevent the escape of toxic air components during tests, such as TiCl4, due to insufficient filter performance, and often require excessive installation space.
Innovation Solution
A filter system with a main flow direction that is longer or equally long compared to other directions, arranged to maximize the flow path through the filter, ensuring sufficient filtration without increasing the installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter is arranged with the main flow direction perpendicular to the filter membrane surface (shortest path), then the installation space is minimized, but the filtration performance is insufficient to prevent toxic substance escape
Solution Approach 1:
The filter is rotated 90 degrees relative to the conventional arrangement, changing the dimension in which the flow path extends. Instead of the flow path being perpendicular to the filter surface (shortest path), the main flow direction is now along the longer extension of the filter, utilizing the length dimension to extend the flow path and improve filtration performance without increasing the cross-sectional area.
2Reliability
If the filter extension in the main flow direction is increased to improve filtration, then the filtration performance improves, but the installation space increases
Solution Approach 1:
The solution utilizes the length dimension of the filter housing to extend the flow path, rather than increasing the cross-sectional area. By arranging the main flow direction along the longer extension of the filter and rotating the filter 90 degrees, the invention achieves extended flow path length without increasing the installation footprint, effectively using the third dimension (length) to resolve the space-performance contradiction.
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 filter system effectively prevents the escape of toxic substances during tests and maintains high filtration efficiency with the same or reduced space, passing standardized smoke tests and ensuring no substances escape to the outside.
Implementation Method 1
pressure equalization is achieved, for example, by means of a hydrophobic filter membrane and a further filter made of activated carbon fabric connected in series
Implementation Method 2
pressure equalization is achieved, for example, by means of a hydrophobic filter membrane
Implementation Method 3
a further filter made of activated carbon fabric connected in series
Data Source
AI summary
A filter system for a closed fluid transfer system with pressure equalization. The filter system includes a filter having a main flow direction for a fluid passing through the filter extending from a fluid inlet surface to a fluid outlet surface, and a filter housing. The filter has a greater or at least equal extension in the main flow direction compared to at least one direction transverse to the main flow direction.