X-ray Fluorescence Analyzer Local Cooling via Peltier Element
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Solution Overview
Problem
In wavelength dispersive X-ray fluorescence analyzers, the temperature fluctuations of the analyzing crystal due to environmental influences can decrease analytical precision, and existing temperature regulators maintain the entire housing at a target temperature, preventing the use of X-ray detectors recommended for lower temperatures due to thermal noise degradation.
Innovation Solution
Incorporating a Peltier element to locally cool the X-ray detector to a temperature lower than the target temperature while maintaining the analyzing crystal at the target temperature using a warm air generator, allowing for the use of detectors recommended for lower temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a warm air generator is provided inside the housing to maintain the analyzing crystal at a target temperature, then the temperature stability of the analyzing crystal is improved, but the temperature of the X-ray detector increases to the target temperature, causing thermal noise degradation
Solution Approach 1:
The patent applies local quality by providing a Peltier element in thermal contact with the X-ray detector to create a localized cooling zone. This allows the detector region to be cooled independently from the rest of the housing, enabling the detector to operate at a lower temperature than the analyzing crystal while the warm air generator maintains the crystal at its target temperature. The local cooling solution resolves the contradiction by creating different thermal conditions in different parts of the system.
2Reliability
If the entire housing is maintained at a target temperature, then the analyzing crystal operates at optimal temperature, but X-ray detectors recommended for lower temperatures cannot be used due to thermal noise
Solution Approach 1:
The Peltier element creates a localized cool zone around the X-ray detector, allowing the detector to operate at its optimal lower temperature while the rest of the housing maintains the target temperature for the analyzing crystal. This local differentiation enables the system to accommodate detectors recommended for lower temperatures without compromising the crystal's operational reliability.
Solution Approach 2:
The Peltier element acts as an intermediary cooling device between the X-ray detector and the warm air generator. It mediates the thermal environment by actively cooling the detector region while allowing the warm air generator to maintain the overall housing temperature, thus enabling compatibility with detectors that require lower operating temperatures.
3Measurement precision
If water-cooled cooling devices are used to cool the X-ray detector, then detection sensitivity is improved, but device complexity and production costs increase
Solution Approach 1:
The patent replaces the complex water-cooled cooling system with a solid-state Peltier element. The Peltier element uses the Peltier effect (electrical current passing through a junction of two different metals or semiconductors creates a temperature difference) to cool the detector, eliminating the need for water circulation systems, heat exchangers, and associated mechanical components. This substitution maintains detection sensitivity while significantly reducing device complexity and production costs.
Solution Approach 2:
The invention extracts the cooling function from the complex water-cooled system and implements it through a compact Peltier element directly attached to the detector. This extraction simplifies the overall system by removing unnecessary water circulation infrastructure while maintaining the essential cooling function needed for high detection sensitivity.
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 the use of X-ray detectors with improved sensitivity and accuracy at lower temperatures while maintaining the analyzing crystal at a stable temperature, simplifying the system and reducing production costs compared to water-cooled cooling devices.
Implementation Method 1
a Peltier element configured to cool the X-ray detector such that a temperature of the X-ray detector is lower than the target temperature
Implementation Method 2
an analyzing crystal configured to spectrally disperse X-ray fluorescence emitted from a sample
Data Source
AI summary
An X-ray fluorescence analyzer is provided inside an analysis chamber covered with a housing with: an X-ray tube; an analyzing crystal for spectrally dispersing X-ray fluorescence emitted from a sample; an X-ray detector for detecting the X-ray fluorescence spectrally dispersed by the analyzing crystal; a warm air generator for generating warm air to maintain a temperature of the analyzing crystal at a target temperature; and a Peltier element for cooling the X-ray detector.