Pressurized Fluid Station for Nebulizer Blockage Removal
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Solution Overview
Problem
Conventional self-aspirating nebulizers experience flow stoppage due to gas bubbles and limitations in flow rate adjustment, requiring user intervention and compromising the unattended operation of automated sampling systems, especially when handling high-purity or viscous samples.
Innovation Solution
A pressurized fluid station is integrated with automated sampling devices, featuring a vessel with contoured walls to form a seal around the sample probe and a delivery system for pressurized fluids, such as gases or liquids, to remove blockages and enable high-speed rinsing by regulating the flow of pressurized fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a self-aspirating nebulizer is used to eliminate pumping system contamination and periodic noise, then sample purity and measurement precision are improved, but flow stoppage occurs due to bubble formation requiring user intervention
Solution Approach 1:
The invention extracts the harmful bubbles from the capillary by introducing a pressurized gas stream that selectively removes bubbles while allowing the liquid sample to continue flowing through the nebulizer, thereby maintaining continuous operation without user intervention
Solution Approach 2:
A pressurized gas (such as nitrogen or compressed air) is introduced as an intermediary substance to disrupt and remove bubbles from the capillary. The gas acts as a mediator between the bubble problem and the liquid sample flow, enabling continuous operation without requiring the nebulizer to be manually cleared
2Reliability
If a pumped nebulizer is used to drive sample flow at high pressure to overcome bubble resistance, then reliable sample flow is achieved, but contamination and larger sample volumes are introduced
Solution Approach 1:
The invention removes the pumping system entirely from the nebulizer design, replacing it with a self-aspirating mechanism that uses the nebulizer's own operating pressure to draw sample through the capillary, thereby eliminating pump-related contamination and pulsation while maintaining reliable sample flow
Solution Approach 2:
The nebulizer becomes self-sufficient by using its own operating pressure to aspirate sample through the capillary without requiring an external pump. The system serves itself by utilizing the pressure differential created during nebulizer operation to maintain continuous sample flow
3Device complexity
If a self-aspirating nebulizer operates at fixed flow rate to maintain simplicity, then device complexity is reduced, but high-speed rinsing between analyses is limited
Solution Approach 1:
The invention introduces a valve system that dynamically controls the flow rate of pressurized gas introduced into the capillary. By adjusting the valve, the operator can vary the gas pressure to achieve different rinsing speeds between analyses while maintaining the simple self-aspirating nebulizer design
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 pressurized fluid station effectively prevents flow stoppage and allows for high-speed rinsing between analyses, enhancing the reliability and automation of sample processing without introducing contamination or pulsation, thus overcoming the limitations of conventional self-aspirating nebulizers.
Implementation Method 1
a delivery system is coupled to the vessel for delivery of a pressurized fluid to the sample probe
Implementation Method 2
The vessel includes walls contoured to form a seal around the sample probe
Data Source
AI summary
The present invention is directed to a pressurized fluid station. In an exemplary embodiment, the pressurized fluid station includes a vessel for receiving a sample probe. The vessel includes walls contoured to form a seal around the sample probe. Further, a delivery system is coupled to the vessel for delivery of a pressurized fluid to the sample probe while the sample probe is disposed within the vessel. In use, the formation of a seal around the sample probe and delivery of a pressurized fluid into the probe while such probe is disposed within the vessel allows for removal of sample blockage from the probe as well as high speed rinsing of the sample probe in between analyses.