Expiratory Valve Uneven Support Surface Deformation
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Solution Overview
Problem
Conventional expiratory valves in mechanical ventilation systems often produce unpleasant noise and can cause auto trigger or auto cycle malfunctions due to oscillating pressure fluctuations, leading to premature initiation of inspiration phases and potential danger for ventilated patients.
Innovation Solution
The expiratory valve features a valve body with a specifically designed uneven support surface that deforms to ensure a planar contact with the valve membrane, preventing folds and enhancing airtight fixation, thereby reducing noise and improving sensitivity to expiration phase transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support surface is made planar to ensure full contact with the valve membrane, then the airtight sealing is improved, but the deformation caused by clamping forces during mounting cannot be compensated
Solution Approach 1:
The support surface is pre-formed with an uneven design that anticipates the deformation that will occur during mounting. The unevenness is specifically designed to compensate for the expected clamping force deformation, so that when the expiratory valve is mounted to the ventilation device, the top side of the support becomes planar and ensures full contact with the valve membrane.
2Device complexity
If conventional expiratory valves are used with standard valve membrane fixation, then the structure is simple, but noise is generated and auto trigger malfunctions occur due to oscillating pressure fluctuations
Solution Approach 1:
The support surface is designed with specific local unevenness characteristics that are tailored to compensate for deformation in specific areas. This localized quality adjustment ensures that the valve membrane is held firmly without folds or gaps at critical locations, preventing oscillating pressure fluctuations and noise generation.
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 effectively reduces noise generation and minimizes the occurrence of auto trigger or auto cycle malfunctions, ensuring safer and more reliable operation by maintaining airtight sealing and precise phase detection.
Implementation Method 1
the valve body is deformed by clamping forces, wherein the surface of the support formed on the valve body has an uneven design such that the deformation of the valve body caused by clamping forces in mounting the expiratory valve to the ventilation device has the effect that the top side of the support becomes planar
Data Source
AI summary
The present invention relates to an expiratory valve (10) of a ventilation device (100), comprising a valve body (12) having a fluid inlet (14) and a fluid outlet (16) for breathing air of a patient formed therein, said valve body (12) comprising a support (42) having a top side (46) on which a valve membrane (20) can be placed with an abutment area formed at the outer edge thereof, with the top side (46) of the support (42) having an uneven design.