Modular Gas Chromatography Unit with Integrated Flow Control
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Solution Overview
Problem
Current gas chromatography (GC) systems face challenges in correctly configuring multi-column systems due to difficulties with microfluidic devices and flow control, particularly in compact or oven-less GCs, and lack a scalable design to support advanced analytical tasks like multidimensional GC and multiple independent column heating zones.
Innovation Solution
The design includes a gas chromatographic (GC) unit with inlet-side and outlet-side microfluidic devices, a column, and a flow controller, featuring multiple ports and channels for fluidic communication, enabling flexible configuration and scalable architecture for GC systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If microfluidic devices and flow control devices are used in multi-column GC systems, then analytical functionality is enhanced, but device complexity and difficulty of configuration increase
Solution Approach 1:
The patent implements a universal GC unit design where a single modular unit can serve multiple analytical functions (single-column and multi-column configurations) through standardized microfluidic interfaces. The flow controller with multiple ports can be configured for different column arrangements without requiring different hardware, thus enhancing versatility while managing complexity through standardization.
Solution Approach 2:
The GC system is divided into modular GC units that can be independently configured and combined. Each unit contains segmented functional components (inlet-side microfluidic device, outlet-side microfluidic device, flow controller) that can be assembled in different configurations for single-column or multi-column operations, making the system adaptable while maintaining manageable complexity through modularity.
2Volume of moving object
If compact or oven-less GC designs are implemented, then system size is reduced, but microfluidic devices become cold spots affecting performance
Solution Approach 1:
The patent applies localized heating to the microfluidic devices within the compact GC unit. Instead of requiring a large forced convection oven, localized thermal zones are created directly at the microfluidic components to prevent them from becoming cold spots, thus maintaining appropriate temperature in the critical fluidic paths while keeping the overall system compact.
Solution Approach 2:
The patent extracts the heating function from the traditional large forced convection oven and integrates it directly into the compact GC unit structure. By taking out the heating capability and placing it locally within the microfluidic device housing, the system achieves compact size while preventing cold spots at critical locations.
3Temperature
If traditional forced convection GC oven is used, then microfluidic devices are heated uniformly, but system size and complexity increase
Solution Approach 1:
The heating system is segmented from the traditional large forced convection oven into localized heating zones integrated within the compact GC unit. Each microfluidic device has its own localized thermal control, eliminating the need for a large uniform heating chamber while maintaining appropriate temperatures where needed.
Solution Approach 2:
The patent transitions from three-dimensional forced convection heating (requiring large oven volume) to localized thermal zones created through direct heating elements integrated with the microfluidic device structure. This dimensional change in heating approach allows uniform heating效果 in the critical fluidic paths without requiring large overall system volume.
Data Source
AI summary
A gas chromatographic (GC) unit or module may include one or more microfluidic devices, a GC column, and a flow controller (FC) comprising an FC input port for controlling fluid flows and pressures. The GC unit may be reconfigurable to provide different functionalities. The GC unit may be fluidly coupled to various other fluidic devices, such as other GC units, sample inlets, GC detectors, and the like. Multiple GC units and other fluidic devices may be utilized to build GC devices and associated systems of flexible, reconfigurable, and scalable architecture, thereby enabling a variety of modes of operation useful for present and future GC method development.