Modular Powered Air Purifying Respirator with Optimized Scroll
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Solution Overview
Problem
Existing powered air-purifying respirators (PAPRs) lack modularity and efficient airflow optimization, which can lead to reduced performance in filtering ambient air and providing consistent positive pressure to respirator masks, especially when used in hazardous environments.
Innovation Solution
A modular PAPR module with a compact, self-contained design that includes a motor, centrifugal fan, and optimized scroll for air flow, featuring a rechargeable power source and control circuit to maintain constant airflow, allowing for multiple configurations such as belt-worn or mask-mounted use, with bayonet connectors for easy attachment and detachment of filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional PAPR design with fan and filter mounted on belt or backpack is used, then the system can provide sufficient airflow, but the device complexity and weight distribution are suboptimal
Solution Approach 1:
The PAPR system is divided into separate modular components: a filter canister that attaches to the mask, a powered module with fan and motor, and a battery pack. These modules can be independently selected, attached, and detached to create customized configurations based on specific application needs, reducing overall system complexity while maintaining airflow performance.
Solution Approach 2:
The powered module and battery pack can be configured to work with different mask types and filter canisters through standardized connection interfaces. The system can be adapted for various respiratory protection applications by simply changing the filter canister or adjusting the battery position, providing multi-functionality without increasing device complexity.
2Weight of moving object
If the fan and power source are mounted remote from the mask, then the mask weight is reduced, but the device complexity increases due to hoses and connections
Solution Approach 1:
The system separates the mask from the powered components, with the filter canister attaching directly to the mask and the fan/battery assembly positioned remotely on the user's body. This segmentation allows the mask itself to remain lightweight while the heavier components are distributed elsewhere, and the simplified direct-attachment interface between filter and mask reduces connection complexity.
3Device complexity
If a non-modular PAPR design is used, then the system structure is simpler, but the adaptability to different respiratory hazards and mask types is reduced
Solution Approach 1:
The filter canister is designed as a separate, interchangeable component that can be quickly attached and detached from the mask. Different filter canisters can be selected based on the specific respiratory hazard (particulate, gas, vapor), allowing the system to adapt to various protection needs without redesigning the entire PAPR structure.
Solution Approach 2:
The standardized connection interface between the filter canister, powered module, and mask allows a single base system to support multiple filter types and mask configurations. This universal interface design enables the system to be adapted to different respiratory hazards and user preferences without increasing the fundamental system structure complexity.
4Reliability
If the filter canister is permanently attached to the mask, then the connection reliability is improved, but the ease of operation for filter replacement is reduced
Solution Approach 1:
The connection interface between the filter canister and mask is designed to be dynamically adjustable - providing a secure, reliable connection during use while allowing for quick, tool-free attachment and detachment. The mechanical interface maintains stable engagement through positive locking features during operation, but can be easily opened by simple manual action for filter replacement.
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 modular design ensures efficient filtration and consistent airflow, providing extended use in hazardous environments with reduced weight and increased flexibility, enabling effective protection against various respiratory hazards.
Implementation Method 1
A modular powered air purifying respirator (PAPR) module includes a motor, a centrifugal fan, and an optimized scroll for air flow
Data Source
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AI summary
A modular powered air purifying respirator (PAPR) which is comprised of a fan, motor, scroll, and power source mounted within one housing, and which accepts either traditional or conformal filters. Ambient air is drawn into the PAPR module through the attached filter by a fan, which is driven by direct connection to a motor. The pressurized air is then accelerated by an optimized scroll to the outlet in the PAPR housing. The PAPR module can be employed in multiple use configurations.