Variable Temperature Analytical Instrument Assemblies, Components, and Methods for Providing Variable Temperatures
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Solution Overview
Problem
Existing sample analysis systems require lengthy times to change temperatures, particularly for low Kelvin analyses, leading to prolonged analysis and result times.
Innovation Solution
A variable temperature analytical assembly with a first mass maintained at variable temperatures and a second mass movable between thermally engaged and disengaged positions, utilizing low thermal conductance components and thermally insulated members to facilitate rapid temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional thermal connection methods are used to maintain sample temperature, then thermal stability is improved, but temperature change time increases significantly
Solution Approach 1:
The thermal connection system is segmented into discrete thermal links that can be independently controlled. The sample support assembly includes multiple thermal links (e.g., thermal connectors, heat transfer elements) that can be selectively engaged or disengaged from the cold source, allowing partial thermal connection rather than complete connection or disconnection. This enables finer control over temperature transitions while maintaining stability during analysis.
Solution Approach 2:
The thermal connection system transitions from a static state (either fully connected or fully disconnected) to a dynamic state where the degree of thermal connection can be continuously adjusted. The sample support assembly can move between different positions along a thermal gradient, or adjust the contact area with thermal links, enabling rapid temperature changes while maintaining thermal stability when needed.
2Productivity
If rapid temperature changes are implemented, then analysis time is reduced, but thermal stability during analysis deteriorates
Solution Approach 1:
The system performs preliminary temperature adjustment actions before the actual analysis begins. The sample support assembly can be pre-positioned or pre-cooled/heated to the desired temperature range, and thermal links can be pre-engaged or pre-disengaged, so that when analysis starts, the temperature is already stable and ready, eliminating the need for temperature changes during analysis.
Solution Approach 2:
The thermal connection system maintains continuous thermal control throughout the analysis process. Rather than switching between disconnected and connected states, the system maintains a continuous thermal link with adjustable strength, ensuring that once the desired temperature is reached, thermal stability is maintained without interruption or fluctuation during the analysis.
3Reliability
If thermal connection is maintained for stable temperature, then temperature control is improved, but temperature transition speed decreases
Solution Approach 1:
Different parts of the sample support assembly have different thermal properties. The assembly includes regions with high thermal conductivity for rapid temperature transitions and regions with low thermal conductivity for stable temperature maintenance. Thermal links are strategically positioned to provide localized thermal connection where needed, allowing fast transitions in critical areas while maintaining stability in other areas during analysis.
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 rapid temperature transitions between 4 Kelvin and 1000 Kelvin, reducing analysis time and improving efficiency in variable temperature instrumentation.
Implementation Method 1
thermally insulated members coupled to the mass and thermally insulating the mass from the cold source
Implementation Method 2
a second mass moveable between a first position and a second position. The first position can be thermally disengaged from the first mass and the second position can be thermally engaged to the first mass
Data Source
AI summary
Variable temperature analytical assemblies are provided and/or methods for changing temperatures of a mass are provided. Low thermal conductance components and/or assemblies are also provided. Methods for thermally isolating a mass from a support structure are also provided.