Ventilated Hood Filter Seal for Emergency Breathing Backup
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing protective suits fail to provide efficient emergency breathing solutions when the primary air supply fails, risking contamination and health hazards due to uncontrolled airflow.
Innovation Solution
Incorporation of a filter and seal system within the protective suit and ventilated hood that allows controlled airflow through a filter when the primary air supply fails, maintaining a positive pressure differential and preventing contamination ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the external air flow hose is used for normal operation, then the powered air purifying respirator can supply breathable air efficiently, but the system risks contaminant infiltration when external air flow fails and consumes battery energy continuously
Solution Approach 1:
The filter is pre-installed within the hood structure and the seal is pre-positioned to block the filter opening during normal operation. In case of external air flow failure, the user can immediately breach the seal to access the pre-positioned filter, enabling rapid transition to emergency breathing mode without delay for locating or installing emergency equipment
Solution Approach 2:
The system incorporates a redundant emergency breathing path with a filter that is already in place but blocked by a seal during normal operation. This pre-prepared emergency path cushions against the harmful effect of external air flow failure by providing an immediate alternative air supply route that prevents contaminant infiltration when the primary system fails
2Use of energy by moving object
If the seal remains intact during normal operation, then air does not flow through the filter maintaining system efficiency, but the filter cannot provide emergency breathing capability when external air flow fails
Solution Approach 1:
The air supply system is segmented into two distinct paths: the primary external air flow path used during normal operation, and the secondary emergency path through the filter blocked by the seal. This segmentation allows the system to use energy efficiently during normal operation while maintaining ready-access emergency capability through the sealed-off filter path
Solution Approach 2:
The seal configuration dynamically changes from a blocked state during normal operation (maintaining energy efficiency) to an open state during emergency conditions. The user can breach the seal to activate the emergency breathing path, allowing the system to adapt its air flow characteristics based on operational conditions
3Reliability
If a filter is incorporated in the ventilated hood for emergency use, then emergency breathing capability is provided, but the device complexity increases with additional components
Solution Approach 1:
The emergency breathing filter is merged with the hood structure itself, integrating the emergency air supply capability into the existing head protection device. This combination eliminates the need for separate emergency breathing apparatus while providing integrated emergency protection through the filter incorporated directly in the hood
Solution Approach 2:
The ventilated hood is designed with multi-functionality, serving both as the primary head protection device during normal operation and as an emergency breathing apparatus when external air flow fails. The incorporated filter and seal mechanism enable the hood to perform dual functions, reducing the need for additional specialized equipment
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
Ensures safe emergency breathing by filtering contaminants and maintaining a pressure differential, reducing health risks and extending safe operation time in contaminated environments.
Implementation Method 1
a collar coupled to the external air flow hose and configured to inflate in response to air flow in the external air flow hose
Data Source
AI summary
A ventilated hood having an external air flow hose and comprising a filter incorporated in the ventilated hood, and a seal, wherein when the seal is intact, air does not flow through the filter.