Offset Layered Facepiece Filter for Pathogen Elimination
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Solution Overview
Problem
Conventional facial masks and respirators are often designed for single-use, difficult to sterilize, and lack the capability to actively combat pathogens, with most focusing on reducing exposure rather than actively eliminating airborne pathogens.
Innovation Solution
A facepiece with a multi-layered airflow filtration system and integrated anti-pathogen features, including metalized surfaces and UV LEDs, designed to capture and destroy pathogens within the airflow, allowing for reuse and enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional facial masks and respirators are designed for single-use, then pathogen protection is provided, but sterilization difficulty and waste generation increase
Solution Approach 1:
The respirator is divided into a reusable main body and replaceable filter cartridges. The main body can be sterilized and reused, while filter cartridges are replaced when contaminated. This segmentation resolves the contradiction by making the sterilizable portion reusable while maintaining pathogen protection through replaceable filtration elements.
Solution Approach 2:
The filter cartridges are designed to be discarded after use and replaced, while the main body is recovered, sterilized, and reused. This approach maintains pathogen protection through continuous use of sterilizable components while managing contamination through selective replacement of non-sterilizable filter elements.
2Reliability
If conventional respirators focus on reducing exposure to pathogens, then filtration is provided, but active pathogen elimination capability is lacking
Solution Approach 1:
The patent combines passive filtration (physical barrier) with active pathogen elimination (UV-C irradiation and photocatalytic oxidation) in a single integrated system. The UV-C LEDs and TiO2 coating work together with the filter media to provide both exposure reduction and active pathogen destruction, resolving the contradiction between simple filtration and active elimination.
Solution Approach 2:
The patent replaces purely mechanical filtration with a hybrid system incorporating electromagnetic radiation (UV-C LEDs) and photochemical reactions (TiO2 photocatalysis). This substitution adds active pathogen elimination capability beyond mechanical filtering, addressing the limitation of conventional respirators.
3Reliability
If multi-layered airflow path defining features are implemented, then pathogen capture efficiency increases, but device complexity increases
Solution Approach 1:
The multiple layers of airflow path defining features serve multiple functions simultaneously: they create tortuous airflow paths for enhanced pathogen capture, provide structural support for the filter cartridge, and maintain spacing between filtration layers. This multi-functionality reduces the need for separate components, offsetting the added complexity with functional consolidation.
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 reusable facial protection system that effectively captures and destroys pathogens, improving user safety and reducing the risk of infection, while maintaining breathability and comfort.
Implementation Method 1
a plurality of UV LEDs configured to emit UV-C light into the airflow path between the user's mouth and nose and the external environment
Implementation Method 2
The airflow path defining features can include a metalized surface configured to capture and destroy pathogens within the airflow path
Implementation Method 3
The main body includes a filter defining a plurality of airflow torture paths extending therethrough between the interior cavity and an external environment
Data Source
AI summary
A facepiece comprising a main body having a geometry configured to fit on a human face and cover the human's mouth and nose is provided. The main body defines an interior cavity between the main body and the human's face. The facepiece also includes one or more straps extending from the main body and configured to extend around the ears or head of a human such that the main body is held on the human's face. The main body includes a filter defining a plurality of airflow torture paths extending therethrough between the interior cavity and an external environment. The filter includes three or more layers of airflow path defining features, each airflow path defining feature providing a passageway for air to pass therethrough. The path defining features in adjacent layers are fluidly coupled but offset to form the airflow torture paths.