Mass Spectrometer Vacuum Layout for Compact Multi-Region Pressure Control
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Solution Overview
Problem
Existing mass spectrometers are not optimized for reducing volume and mass, and lack individual pressure control and variable management, which are crucial for efficient analysis of air and water pollution containing fine dust.
Innovation Solution
A mass spectrometer design featuring an upper and lower flow path with turbo pumps and a main pump for vacuum pressure application, along with a regulation valve for pressure adjustment, allowing for independent control of pressure and various variables in the reaction tube, enabling efficient ion generation, selection, and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single pump system is used in existing mass spectrometers, then the device complexity is reduced, but the ability to individually control pressure in different regions is lost
Solution Approach 1:
The pump system is segmented into a main pump and two auxiliary turbo pumps, with each pump responsible for a specific region (main pump for reaction tube, turbo pumps for ion source and detector regions). This segmentation enables independent pressure control in each region while maintaining overall system functionality.
Solution Approach 2:
The main pump serves multiple functions by being connected to both turbo pumps through the vacuum system, providing vacuum support to the entire instrument while allowing individual region control through the auxiliary pumps. This multi-functionality reduces the need for completely separate pump systems.
2Measurement precision
If multiple pumps are added for individual pressure control, then pressure control precision is improved, but the device volume increases
Solution Approach 1:
The auxiliary turbo pumps are integrated into the existing vacuum system structure, with the main pump providing the primary vacuum and turbo pumps providing localized pressure control where needed. This nested arrangement minimizes additional volume while achieving precise pressure control in critical regions.
3Volume of stationary object
If a compact design is implemented, then the volume is reduced, but the ability to control various operational variables is limited
Solution Approach 1:
The pump system is designed with dynamic control capabilities, allowing the main pump and auxiliary turbo pumps to operate at different speeds and pressure levels independently. This dynamic operation enables flexible control of various operational variables (ion source pressure, detector pressure, reaction tube pressure) within a compact volume.
Solution Approach 2:
The system enables independent adjustment of pressure parameters in different regions through the coordinated operation of the main pump and auxiliary turbo pumps. By changing pressure parameters locally in the ion source and detector regions while maintaining overall compactness, the system achieves versatile variable control without volume increase.
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 configuration reduces the overall volume and mass of the spectrometer, allows for precise pressure control, and optimizes the analysis of pollutants by enabling flexible operation under various conditions, enhancing the detection of specific constituents in samples.
Implementation Method 1
a first turbo pump coupled to the upper region to apply vacuum pressure to the upper flow path; a second turbo pump coupled to the lower region to apply the vacuum pressure to the lower flow path
Data Source
AI summary
Provided is a mass spectrometer including: an upper region providing an upper flow path; a lower region providing a lower flow path; a reaction tube providing a reaction passage connecting the upper flow path and the lower flow path; a first turbo pump coupled to the upper region to apply vacuum pressure to the upper flow path; a second turbo pump coupled to the lower region to apply the vacuum pressure to the lower flow path; and a main pump. Here, the main pump is connected to: the first turbo pump and connected to the upper flow path through the first turbo pump; the second turbo pump and connected to the lower flow path through the second turbo pump; and the reaction passage to apply the vacuum pressure to the reaction passage.