Evolved Gas Analyzer External Cooling Unit
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Solution Overview
Problem
Conventional evolved gas analyzers face inefficiencies due to long sample cooling times, leading to reduced work efficiency and the need for excessive cooling performance and large apparatus sizes, especially when analyzing phthalates which are restricted substances.
Innovation Solution
An evolved gas analyzer design featuring a sample holder that moves between a heating unit and a cooling unit, where the cooling unit is externally positioned and uses air cooling fins and a fan to rapidly cool the sample holder, reducing the need for extensive cooling performance and apparatus size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If natural cooling is used to cool the sample holder after analysis, then the apparatus structure remains simple, but the cooling time is long and work efficiency is reduced
Solution Approach 1:
The cooling unit is activated immediately after the heating unit completes analysis to preemptively cool the sample holder. This preliminary cooling action eliminates the need for long natural cooling periods, thereby improving work efficiency and reducing the time loss between analyses.
2Productivity
If a cooling device is introduced into the vacuum chamber to cool the sample holder, then cooling performance is improved, but the apparatus configuration becomes complicated and size increases
Solution Approach 1:
The cooling unit is extracted from the vacuum chamber environment and positioned externally. This separation allows the cooling device to operate independently without complicating the vacuum chamber configuration, while still achieving effective cooling of the sample holder through thermal conduction across the chamber wall.
3Loss of time
If excessive cooling performance is provided to cool the heating furnace, then the sample holder can be cooled rapidly, but the cooling device and entire apparatus become large in size
Solution Approach 1:
The cooling unit is designed to provide localized cooling specifically at the sample holder position rather than cooling the entire heating furnace. This targeted approach achieves rapid cooling of the sample holder without requiring excessive cooling capacity, thereby keeping the apparatus size compact.
4Productivity
If the cooling unit is positioned inside the heating furnace, then direct cooling of the sample holder is achieved, but the heating furnace temperature is reduced requiring extra energy and time to heat again
Solution Approach 1:
The sample holder acts as an intermediary between the heating furnace and cooling unit. The cooling unit cools the sample holder externally without directly cooling the heating furnace air. This mediator approach allows efficient cooling of the sample holder while preserving the heating furnace temperature, avoiding extra energy and time requirements for reheating.
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 design enhances analysis efficiency by rapidly cooling the sample holder, allowing for multiple sample measurements without excessive cooling performance or large apparatus size, while maintaining efficient heating unit operation.
Implementation Method 1
a cooling unit provided at an outside of the heating unit, and cooling the sample holder by being in direct or indirect contact with the sample holder
Implementation Method 2
uses air cooling fins and a fan to rapidly cool the sample holder
Data Source
AI summary
Disclosed herein are an evolved gas analyzer and a method for analyzing evolved gas, the apparatus cooling a sample holder in a short time without using excessive cooling performance and without providing the entire apparatus in an excessively large size, thereby enhancing analysis work efficiency. The apparatus 200 includes: a sample holder 20 holding a sample S; a heating unit 10 receiving the sample holder therein, and evolving a gas component G by heating the sample; a detecting means 110 detecting the gas component; a sample holder supporting unit 204L movably supporting the sample holder to move the sample holder to predetermined outer and inner positions of the heating unit; and a cooling unit 30 provided at an outside of the heating unit, and cooling the sample holder by being in direct or indirect contact with the sample holder, when the sample holder is moved to a discharging position.