Gas Sample Introduction Device with Dual-Mode Collection Tube

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Solution Overview

Problem

Conventional gas sample introduction devices for gas chromatography require a pre-column and dedicated channel switching system for the pre-cut method, leading to increased complexity, size, and cost.

Innovation Solution

A gas sample introduction device that allows switching between metering and concentrating modes, utilizing a metering tube, a collection tube with adsorbent for thermal desorption, and channel switching valves to function the collection tube as a pre-column, eliminating the need for a separate pre-column and channel switching system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a pre-column and dedicated channel switching system are added to enable pre-cut method, then sample separation capability is improved, but device complexity increases

Engineering Contradiction:

Improvepre-cut method capabilityVSAvoidchannel switching system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The collection tube is designed to serve multiple functions: it acts as both the concentrating device for sample gas and the pre-column for sample separation. This multi-functionality eliminates the need for a separate pre-column and its dedicated channel switching system, thereby reducing device complexity while maintaining pre-cut method capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention merges the concentrating device (collection tube) and the pre-column into a single integrated component. By combining these two previously separate functions into one device, the channel switching system is simplified and the overall device complexity is reduced while still enabling the pre-cut method.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If a pre-column and dedicated channel switching system are added for pre-cut method, then sample separation capability is improved, but device size increases

Engineering Contradiction:

Improvepre-cut method capabilityVSAvoiddevice volume

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The collection tube performs dual functions as both concentrating device and pre-column, eliminating the need for additional separate components. This integration reduces the overall device volume while maintaining the pre-cut method capability for sample separation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

By merging the concentrating device and pre-column into a single integrated collection tube, the device occupies less space. The combined design eliminates redundant components and reduces the overall footprint of the gas sample introduction device.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If a pre-column and dedicated channel switching system are added for pre-cut method, then sample separation capability is improved, but manufacturing cost increases

Engineering Contradiction:

Improvepre-cut method capabilityVSAvoiddevice manufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The collection tube is designed to perform multiple functions (concentration and pre-column separation), which reduces the total number of components that need to be manufactured and assembled. This multi-functionality leads to lower manufacturing costs while maintaining the pre-cut method capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The integration of the concentrating device and pre-column into a single collection tube simplifies the manufacturing process by reducing the number of parts. Fewer components mean lower material costs, assembly costs, and quality control expenses, thereby reducing the overall manufacturing cost.

Inventive Principle:

Principle #5Merging (Combining)

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

Enables sample introduction by the pre-cut method without additional hardware, simplifying the device configuration and reducing costs while maintaining analysis efficiency by separating and eliminating unnecessary components.

Implementation Method 1

a concentrating device which comprises a collection tube (51) containing an adsorbent and concentrates the sample gas through thermal desorption

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

a concentrating device which comprises a collection tube (51) containing an adsorbent and concentrates the sample gas through thermal desorption

Methodology Applied

Scientific EffectThermal desorption: Desorption

Data Source

PatentUS9588088B2Gas sample introduction device

Publication Date: 2017.03.07 SHIMADZU CORP

AI summary

In a gas sample analysis device including a metering tube, sample gas supply channel, carrier gas supply channel, evacuation channel and collection tube, there is provided a first channel switching valve which switches between a load state in which the metering tube is interposed between said sample gas supply channel and the evacuation channel and an injection state in which the metering tube is interposed between the sample gas supply channel and gas analysis device; and a second channel switching valve which, in the load state or injection state, switches between a collection tube interposition state in which the collection tube is interposed between the sample gas supply channel and the metering tube or between the metering tube and the gas analysis device, and a collection tube shunt state in which the collection tube is not interposed.