Feather Down Filter Medium for Humidity-Resistant Air Filtration
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Solution Overview
Problem
Existing air/gas filtration methods face efficiency decline due to particulate buildup, requiring frequent replacement of filters, and lack adaptability for trapping various particle sizes and humidity-resistant performance.
Innovation Solution
A filter medium comprising a homogeneous core layer of feather down clusters held in a 3-dimensional interconnected filament structure, with an air-permeable scrim sheet and chemical treatments, allowing for customizable density and multi-layer filtration to trap different particle sizes and resist humidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional filter media are used to capture particles, then filtration efficiency increases as particles accumulate, but the flow rate of air or gas through the filter decreases and the filter needs to be replaced
Solution Approach 1:
The filter medium utilizes the natural porous structure of down clusters, which consist of numerous fine fibers radiating from a central core, creating inherent air pockets and channels. This porous architecture allows air and gas to flow through while capturing particles, maintaining both filtration efficiency and flow rate without the need for replacement
Solution Approach 2:
The invention combines down clusters with a binder material to create a composite filter medium. The down clusters provide the porous filtration structure while the binder holds the clusters together in a sheet form, creating a material that maintains structural integrity and filtration performance over extended use
2Reliability
If filter density is increased to trap smaller particles, then filtration efficiency improves, but air permeability and flow rate decrease
Solution Approach 1:
The filter medium achieves different local densities within its structure. The down clusters themselves create localized high-density regions for particle trapping, while the spaces between clusters maintain lower density regions for air flow. This local variation in density allows simultaneous achievement of high filtration efficiency and good air permeability
Solution Approach 2:
The filter utilizes the three-dimensional structure of down clusters, with fibers radiating in multiple directions from central cores. This 3-dimensional arrangement creates filtration pathways and air pockets in multiple dimensions, allowing particles to be trapped throughout the volume while maintaining open channels for gas flow
3Temperature
If down clusters are loosely arranged for thermal insulation, then insulating properties improve, but the material lacks structural stability and down shifts or clumps
Solution Approach 1:
The invention creates a composite structure where down clusters are bound together by a binder material. This composite approach maintains the loose, air-trapping arrangement of down clusters for thermal insulation while the binder provides structural stability to prevent shifting and clumping of the clusters
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 a durable, efficient air/gas filtration system that maintains performance by trapping particles of various sizes and resisting humidity, extending filter life and improving air quality through adaptable density and treatment options.
Implementation Method 1
down is formed of clusters having a plurality of fibers radiating from a cluster core with the fibers having a multitude of minuscule hairs to trap air which is an excellent insulator
Implementation Method 2
trapping the clusters in a 3-dimensional interconnected filament structure, a multitude of air pockets are formed by the binder and the filaments of the down to trap the clusters
Data Source
AI summary
An air/gas filter medium is comprised of a substantially homogeneous core layer of feather down clusters held together by a binder to form a 3-dimensional interconnected filament structure throughout the core. The filament structure forms air pocket and connect and trap the feather down clusters which form minute air pockets between its filaments and hairs in which undesirable substances from an air/gas flow therethrough are captured. An air permeable scrim sheet is retained on a surface of the down cluster core. The down cluster core is compressed to a predetermined density to modify the average size of said minute air pockets to trap known undesirable substances from the air/gas flow.