Ostomy Pouch Filter Radial Flow Path Design
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Solution Overview
Problem
Existing ostomy pouch filters with single layers of deodorizing media are bulky and heavy due to the limited axial length of the gas flow path, while complex multilayer filters with fixed flow characteristics are difficult to manufacture and adjust.
Innovation Solution
An ostomy pouch filter comprising two layers of deodorizing media with a vapor barrier layer in between, connected by a carrier film that allows for adjustable gas flow through sealed sections, enabling a tortuous gas flow path and easier manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single layer of deodorizing media is used, then the filter structure is simple, but the axial length of the gas flow path is limited and the media thickness must be increased to achieve desired filtering, making the filter bulky and heavy
Solution Approach 1:
The patent transitions from an axial flow path (single dimension) to a radial flow path (another dimension) by positioning the gas flow path opening radially relative to the多层 filter media. This allows the gas to flow through the media in a radial direction rather than axially, effectively increasing the flow path length without increasing the axial thickness of the media, thereby reducing filter bulkiness and weight while maintaining filtering performance
2Object-affected harmful factors
If a radial flow filter with increased flow path length is used, then gas or odor filtering characteristics are improved, but the filter has a relatively large area or outline in the plan view
Solution Approach 1:
The patent employs a nested structure where the vapor barrier layer is positioned within the多层 filter media, and the gas flow path opening is radially positioned within the filter assembly. This nesting allows the gas flow path to be contained within a compact circular area, minimizing the filter's plan view footprint while still achieving an extended radial flow path length for effective odor filtering
3Object-affected harmful factors
If a complex multilayer filter assembly with fixed flow characteristics is used, then filtering performance is improved, but the filter is difficult and time-consuming to manufacture, and flow characteristics cannot be adjusted after manufacture
Solution Approach 1:
The patent segments the filter assembly into distinct functional components: multiple layers of filter media, a vapor barrier layer, and a gas flow path opening. These segmented components can be manufactured separately and assembled, simplifying the manufacturing process. Additionally, the gas flow path opening can be adjusted or modified after assembly, allowing flow characteristics to be tuned post-manufacture, unlike fixed complex multilayer assemblies
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 provides effective odor filtering with a more compact and adjustable design, reducing bulkiness and manufacturing complexity while maintaining desired filtering performance.
Implementation Method 1
A filter body includes a first layer of deodorizing media, a second layer of deodorizing media and a vapor barrier layer disposed between the first layer and the second layer
Implementation Method 2
a gas-transmissible but liquid impermeable microporous membrane covers a central portion of an outer surface of the filter pad
Data Source
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AI summary
A ostomy pouch filter includes a first layer of deodorizing media, a second layer of deodorizing media, a vapor barrier layer disposed between the first layer and the second layer, a first seal on the first layer on a side of the first layer opposite to the vapor barrier layer, and a carrier film connected to the first layer with the first seal. In addition, the ostomy pouch filter may include a cover film. An ostomy pouch includes a sidewall to which the ostomy pouch filter is sealed.