Bidirectional Reusable Mask Double-Chamber Design
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Solution Overview
Problem
Respiratory masks fail to protect against fine aerosols containing infectious particles and have limited durability and recyclability, requiring frequent replacement and posing challenges in high-risk environments like hospitals during pandemics.
Innovation Solution
A double-chamber protective mask with a pre-chamber and interchangeable filters, using a disposable anti-splash filter to separate the external environment from the mask's filtering components, allowing for sterilization and extended use, along with optional battery-powered ventilation to reduce humidity and improve breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If disposable masks are used to ensure safety and hygiene, then protection against infectious agents is improved, but durability and recyclability deteriorate requiring frequent replacement
Solution Approach 1:
The mask is divided into separate components: a reusable mask body and replaceable filtering elements. This segmentation allows the filtering elements to be disposed of after use while the mask body can be sterilized and reused, resolving the contradiction between safety (disposable filter) and durability (reusable mask).
Solution Approach 2:
The filtering elements are designed to be discarded after use while the mask body is recovered, sterilized, and reused. This principle directly addresses the contradiction by allowing the disposable component (filter) to be replaced while recovering the expensive mask body for continued use.
2Device complexity
If traditional single-chamber masks are used, then device complexity is reduced, but protection against fine aerosols and adaptability deteriorate
Solution Approach 1:
The mask is divided into separate components: a reusable mask body and replaceable filtering elements. This segmentation allows the filtering elements to be disposed of after use while the mask body can be sterilized and reused, resolving the contradiction between safety (disposable filter) and durability (reusable mask).
Solution Approach 2:
The mask body is designed as a universal platform that can accommodate different types of filtering elements (P2, P3, P95, P100) and can be used in various environments (hospital, industrial, pandemic). This multi-functionality increases adaptability without significantly increasing complexity.
3Ease of manufacture
If filters are exposed to the external environment without separation, then ease of manufacture is improved, but reliability and protection against contamination deteriorate
Solution Approach 1:
The filtering element is extracted as a separate, removable component from the mask body. This allows the filter to be easily replaced while maintaining a secure connection during use, resolving the contradiction between ease of manufacture and reliability against contamination.
Solution Approach 2:
A connection mechanism (clip, snap-fit, or adhesive system) acts as an intermediary between the mask body and filtering element. This intermediary allows for easy assembly and disassembly during manufacture and use while maintaining reliable contamination protection during operation.
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 double-chamber design significantly extends the life of filtering components, enhances protection against aerosols, and reduces production costs while ensuring safety and adaptability, making it suitable for various environments and reducing the risk of cross-contamination.
Implementation Method 1
a pre-chamber provided with an anti-splash or anti-droplet filter allowing separating said pre-chamber from a traditional respiratory chamber
Implementation Method 2
They are particularly interesting in high-risk environments such as hospitals during pandemics, where they can effectively limit the risk of contagion
Implementation Method 3
optional battery-powered ventilation to reduce humidity and improve breathability
Data Source
AI summary
A bidirectional reusable filtering face mask is described that includes an anatomical base provided with means to promote adherence to the face and pass-through elements for closure by means of ties; a first filtering chamber used to prevent respiratory droplets from spreading and obtained by fixing a removable disposable filter on the outer side of the anatomical base; a second filtering chamber comprising a removable dome with a recess in its apical part adapted to accommodate a main removable disposable filter, where the filter is secured to the recess by means of a protective grid; and means for assembling the components of the second filtering chamber with the first filtering chamber.