Semipermeable Membrane Sampling Device for Safety Detection
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Solution Overview
Problem
Existing sample collecting and introducing devices face difficulties in increasing the area of semipermeable membranes without increasing the size and weight of the device, which hampers sampling efficiency and user convenience.
Innovation Solution
The semipermeable membrane is arranged outside the sampling device, allowing for a larger surface area without the need to enlarge the device's structural components, and is accompanied by a holding member, air guide cavity, air pump, gas supply device, and temperature control to enhance sample collection and introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the area of the semipermeable membrane is increased to improve sampling efficiency, then the sampling efficiency is improved, but the size and weight of the sampling device has to be increased accordingly
Solution Approach 1:
The device is divided into two independent parts: the sampling device and the semipermeable membrane device. The semipermeable membrane is extracted from the sampling device and placed in a separate membrane device, allowing the membrane area to be enlarged without increasing the size of the sampling device. This segmentation resolves the contradiction by decoupling the membrane area from the sampling device dimensions.
Solution Approach 2:
The semipermeable membrane device is positioned outside the sampling device in a different spatial location, connected via a sample introducing tube. This dimensional repositioning allows the membrane to have a larger area without constraining the compactness of the sampling device, effectively resolving the size-weight tradeoff.
2Productivity
If the area of the semipermeable membrane is increased to improve sampling efficiency, then the sampling efficiency is improved, but the volume of the sampling device has to be increased
Solution Approach 1:
By segmenting the device into sampling and membrane components, the membrane area can be expanded in the membrane device without increasing the volume of the sampling device. The sampling device maintains its compact volume while the separate membrane device provides the necessary large surface area.
Solution Approach 2:
A sample introducing tube serves as an intermediary connection between the sampling device and the semipermeable membrane device. This allows the membrane to be positioned externally with larger area while maintaining functional integration, resolving the volume contradiction.
3Device complexity
If the semipermeable membrane is arranged inside the sampling device, then the structure is compact, but the area of the semipermeable membrane is limited
Solution Approach 1:
The semipermeable membrane is extracted from the interior of the sampling device and placed in a separate membrane device. This extraction allows the membrane area to be significantly increased without being constrained by the internal volume of the sampling device, while the sampling device itself remains compact.
Solution Approach 2:
The membrane device is positioned in a different spatial dimension outside the sampling device, connected via tubing. This external positioning removes the geometric constraints that would limit membrane area if placed inside, allowing large membrane area while maintaining sampling device compactness.
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 configuration enables improved sampling efficiency and user convenience by allowing for a larger semipermeable membrane area without increasing the device's volume or weight, enhancing the collection and detection of samples with a wider boiling point range.
Implementation Method 1
the semipermeable membrane device extracts the sample via a semipermeable membrane
Implementation Method 2
the sampling device sweeps the detected object via airflow to collect samples and conveys the collected samples
Implementation Method 3
the temperature control device is configured to heat and cool the semipermeable membrane, so that the semipermeable membrane device enriches the sample at a relatively low temperature and desorbs the sample at a relatively high temperature
Data Source
AI summary
The present disclosure relates to the technical field of safety detection, and in particular to a sample collecting and introducing device and a detection system. The sample collecting and introducing device provided by the present disclosure includes a sampling device for collecting a sample, and a semipermeable membrane device for extracting the sample collected by the sampling device and conveying the extracted sample to detection equipment, wherein the sampling device is provided with an air guide cavity, the air guide cavity is configured to guide airflow carrying the sample to flow to the semipermeable membrane device, the semipermeable membrane device is provided with a semipermeable membrane which is arranged outside the sampling device. In the present disclosure, the size of the semipermeable membrane is no longer limited by the sampling device, and therefore the difficulty of increasing the area of the semipermeable membrane is reduced.