Cyclone Airflow Sampling Device for Rapid IMS Detection
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Solution Overview
Problem
Existing sampling devices for ion mobility spectrometers are not suitable for rapid on-site detection due to slow temperature rise/fall processes, which hinder their application in field safety detection.
Innovation Solution
A device comprising an air nozzle, a front cavity, and a collecting body that uses a cyclone mechanism to separate sample particles from airflow, allowing for efficient collection and filtration of semi-volatile or non-volatile substances, suitable for on-site rapid sampling analysis with IMS and other analytical instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heating and cooling process is used for sample enrichment, then sampling efficiency is improved, but detection speed deteriorates due to time-consuming temperature changes
Solution Approach 1:
The patent extracts the temperature change process from the sampling mechanism, replacing it with a direct airflow-based sampling approach. The sampling device uses airflow to carry samples directly to the detection chamber without requiring heating or cooling cycles, thus achieving rapid detection while maintaining sampling efficiency.
Solution Approach 2:
The patent replaces the thermal field (heating/cooling system) with a fluid field (airflow system). Instead of using temperature changes to enrich and transport samples, the device uses controlled airflow to carry samples directly to the detection chamber, eliminating the time-consuming thermal processes.
2Manufacturing precision
If complex temperature control system is used, then sampling precision is improved, but device complexity increases
Solution Approach 1:
The patent removes the temperature control system entirely from the sampling device. Sampling precision is achieved through optimized airflow control and chamber design rather than thermal management, significantly simplifying the device structure while maintaining or improving sampling accuracy.
Solution Approach 2:
The patent uses pneumatic principles (airflow control) to achieve precise sample delivery without mechanical or thermal control systems. By controlling air pressure, flow rate, and chamber geometry, the device achieves high sampling precision through fluid dynamics rather than complex temperature regulation mechanisms.
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 device enables high-efficiency sampling with a simple structure, low cost, resistance to high pressures, and high sampling efficiency, making it suitable for on-site rapid detection.
Implementation Method 1
the air nozzle is configured to eject air to a sample attachment surface to generate an airflow entrained with sample particles
Implementation Method 2
the airflow forms a cyclone that rotates downwards within the cylindrical cavity
Implementation Method 3
the other end is connected to an air pump, and the discharge port is connected to the interior of the cylindrical cavity
Data Source
AI summary
The present disclosure provides a device for collecting semi-volatile or non-volatile substance, including an air nozzle, a front cavity and a collecting body. The air nozzle is configured to eject air to a sample attachment surface. The front cavity has an upper port. The collecting body is sealingly connected to a lower end of the front cavity, inside of which is provided with a cylindrical cavity and a conical cavity arranged vertically coaxially, and bottom of which is provided with a sample outlet. The collecting body is provided with an air intake passage which is non-coplanar with respect to an axis of the cylindrical cavity and is disposed obliquely downward and inward. The collecting body is further provided with an air exhaust passage one end of which is a discharge port connected to the interior of the cylindrical cavity, the other end is connected to an air pump.