Parallel Nebuliser Flow Channel for Ventilation Aerosol Loss
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Solution Overview
Problem
Nebulizers for ventilation machines face issues with aerosol deposition on surfaces, leading to high losses and potential malfunctions due to integrated non-return valves, which can be critical for patient safety, and existing designs are not adaptable for the high pressures and flow rates required in ventilation systems.
Innovation Solution
A nebulizer design where the nebulizing device is positioned parallel to the airflow within the flow channel, reducing aerosol deposition and incorporating a bypass to direct bias flow around the nebulizing device, ensuring efficient aerosol delivery and maintaining system pressure during fluid filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the nebulising device is coupled perpendicular to the flow channel (T-connection), then the aerosol can be introduced into the flow, but a high deposition of the aerosol on the surfaces of the flow channel occurs, leading to high losses
Solution Approach 1:
The nebulising device is repositioned from a perpendicular T-connection to a parallel arrangement within the flow channel. The aerosol generation occurs in the same direction as the respiratory air flow, changing the spatial dimension of aerosol introduction from transverse to longitudinal, thereby reducing surface deposition and loss.
2Reliability
If a non-return valve is integrated in the air supply line to prevent backflow, then patient safety is improved, but the valve could have serious consequences should it malfunction and increases device complexity
Solution Approach 1:
The non-return valve function is extracted from the air supply line and replaced by the directional flow characteristics of the parallel nebulising device configuration. The aerosol generation and flow direction are inherently unidirectional, eliminating the need for a separate non-return valve while maintaining patient safety.
3Stress or pressure
If the nebuliser is designed for high pressure ventilation systems (up to 100 mbar), then the ventilation machine can operate at required pressures, but existing nebuliser designs are not adaptable and require significant modification
Solution Approach 1:
The nebulising device is specifically designed with parameters optimized for high-pressure ventilation systems. The parallel flow configuration and internal geometry are engineered to maintain functionality at pressures up to 100 mbar, making it adaptable to ventilation machine requirements without requiring significant modifications to existing designs.
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
This design minimizes aerosol loss, prevents potential malfunctions, and maintains system efficiency by ensuring aerosol delivery parallel to airflow, while allowing for fluid filling without pressure loss, thus enhancing the reliability and effectiveness of ventilation machine operation.
Implementation Method 1
a nebulising device for nebulising a fluid, wherein the nebulising device is configured such that the fluid can be nebulised substantially parallel to, and preferably in, the direction of flow from the first connection to the second connection
Data Source
AI summary
Atomizer for a ventilation machine with a ventilator, including a body with a first connection for connecting the atomizer to a ventilator and a second connection for connecting the atomizer to a line leading to a patient, wherein the body forms a flow channel from the first connection to the second connection; and an atomizing device for atomizing a fluid; wherein the atomizing device is disposed between the first connection and the second connection in the flow channel and adapted so that the fluid can be atomized substantially parallel to, and preferably in, the flow direction from the first connection to the second connection.