Odor Evaluation Device Dilution Gas Adsorption Prevention
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Solution Overview
Problem
Components adsorbing to the switching valve and passage in odor evaluation devices can lead to the loss of odor gas components, especially when using multiple attachment ports and switching valves, resulting in an incorrect odor gas collection.
Innovation Solution
Incorporating a timing detector to track component exit times, a gas collector to gather components with a dilution gas, and a gas introducer to prevent adsorption by diluting the components in the passage, ensuring accurate collection of odor gases into sample bags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple attachment ports and switching valves are used to collect odor gases, then the device can perform comprehensive odor evaluation, but components adsorb to the switching valve and passage, causing loss of odor gas components
Solution Approach 1:
A dilution gas is introduced as an intermediary substance into the passage between the separation column and sample bag. This dilution gas prevents direct contact between odor gas components and the passage walls/swapping valves, thereby preventing adsorption while still allowing the odor gas components to be transported to the sample bag for collection.
2Ease of manufacture
If components are collected directly into sample bags without dilution, then collection is simple, but adsorption to the passage occurs leading to incorrect odor gas collection
Solution Approach 1:
The concentration parameter of the odor gas is changed by introducing a dilution gas into the passage. This dilution reduces the partial pressure and concentration of odor gas components, which significantly decreases their tendency to adsorb to the passage walls and switching valves, thereby improving collection accuracy while maintaining operational simplicity.
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 method prevents the adsorption of components to the passage, allowing for correct evaluation of the odor of the analysis-target gas by ensuring all intended components are collected without loss, thereby maintaining the original odor profile.
Implementation Method 1
a gas chromatograph including a separation column configured to separate a plurality of components contained in an odoriferous analysis-target gas
Implementation Method 2
a gas introducer configured to introduce a dilution gas into a passage connecting the separation column and the sample bag
Data Source
AI summary
An odor evaluation device, including: a gas chromatograph including a separation column configured to temporally separate a plurality of components contained in an odoriferous analysis-target gas; a timing detector configured to detect, for each of the plurality of components, a timing at which the component exits from the separation column; a gas collector configured to collect, into a sample bag, a gas containing all or some of the components exiting from the separation column when the analysis-target gas is passed through the separation column; a timing setter configured to allow a setting of a timing at which a component contained in the gas to be collected into the sample bag exits from the separation column; and a gas introducer configured to introduce a dilution gas into a passage connecting the separation column and the sample bag.