Breathing Mask Test Valve for Leak Detection
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Solution Overview
Problem
Current breathing masks lack a simple and effective method for users to test their leak-proofness and proper fit, which is crucial for ensuring safe air filtration and exhalation.
Innovation Solution
A manually actuable test valve is integrated downstream of the exhalation valve, allowing air to pass in its normal state and closing when actuated, allowing users to check for leaks by attempting to exhale, indicating improper fit or leakage if air escapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a breathing mask is designed with standard inhalation and exhalation valves, then the mask provides basic air filtration and breathing functionality, but the user cannot easily test whether the mask is leak-proof or properly fitted
Solution Approach 1:
The test valve is integrated into the existing exhalation valve structure, allowing the same component to serve both as an exhalation pathway and as a test mechanism. When activated, the test valve closes the exhalation passage to enable leak testing, while in its normal state it allows exhalation. This multi-functional design resolves the contradiction by adding testing capability without requiring a completely separate system.
Solution Approach 2:
The mask system performs self-diagnosis through the test valve mechanism. By closing the exhalation passage and attempting to exhale, the user can independently determine whether the mask is properly sealed without external testing equipment. The system serves its own testing needs through this integrated mechanism.
2Reliability
If the test valve closes the gas passage to build pressure for testing, then leak detection becomes possible, but the user cannot exhale during the test
Solution Approach 1:
The test valve incorporates a movable valve element that can dynamically switch between open and closed states. During normal operation, the valve element remains open to allow exhalation. During testing, the user activates the valve to close the passage temporarily for leak detection, then reopens it to resume breathing. This dynamic switching resolves the contradiction by making the breathing interruption temporary and controllable rather than permanent.
Solution Approach 2:
The testing process occurs in periodic cycles: the user closes the test valve for a brief testing period to check for leaks, then reopens it to resume normal breathing. This periodic activation allows leak detection to be performed intermittently without continuously blocking the exhalation pathway, resolving the contradiction between testing accuracy and breathing continuity.
3Reliability
If additional testing components are added to the breathing mask, then leak testing capability is improved, but the device complexity increases
Solution Approach 1:
The test valve is merged with the exhalation valve structure, using the same valve body and integrating the test functionality into the existing exhalation pathway. Rather than adding a completely separate testing mechanism, the invention combines both functions into a single integrated valve assembly, reducing overall complexity while maintaining testing capability.
Solution Approach 2:
The exhalation valve structure serves dual purposes: it functions as the normal exhalation pathway during breathing and as the test mechanism when activated. This multi-functionality eliminates the need for entirely separate testing components, resolving the contradiction by achieving testing capability through enhanced utilization of existing structures rather than through extensive additions.
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
Enables users to easily verify the mask's tightness and correct positioning by building pressure when the test valve closes, signaling any bypass or improper fit, thus ensuring the mask's functionality and safety.
Implementation Method 1
The valve element (13) is designed as an elastically deformable valve element itself... The valve element itself comprises a rigidity which forces the valve element back into its open state, when it is not actuated or pushed into its closed state by the user.
Data Source
Figure 1
Figure 2~3B
AI summary
The invention relates to a breathing mask (1), in particular for human beings, comprising a flexible mask body (2) designed to fit over a mouth and nose on a user's face, at least one sealing lip (3) for a gas-proof fit on the user's face, comprising at least one inhalation valve (6) penetrating the mask body (2), a filter material assigned to the inhalation valve (6) and an exhalation valve (9) penetrating the mask body (2). It is intended that a manually actuable test valve (11) is arranged downstream of the exhalation valve (9) and designed to provide a gas passage from the exhalation valve (9) to the surroundings in its normal state and to close said passage in its actuated state.