Refractive Index Detector Integrated Switching Mechanism
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Solution Overview
Problem
Existing refractive index detectors require additional switching valves for solvent recycling, increasing costs and installation area, and causing sample diffusion issues when connected to downstream detectors like mass spectrometers.
Innovation Solution
A refractive index detector with integrated switching mechanism allowing selective discharge through two outlet ports, eliminating the need for external switching valves, and incorporating a recycle channel for solvent return to the original container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an external switching valve is added to enable solvent recycling, then solvent reuse capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent integrates the switching mechanism directly into the detector body, merging the solvent recycling function with the existing detector structure. This eliminates the need for separate external switching valves while maintaining the capability to switch between solvent recycling and direct discharge modes, thereby reducing device complexity and cost.
Solution Approach 2:
The detector is designed with a multi-functional switching mechanism that can handle both the detection function and the solvent recycling function through a single integrated system. The switching valve within the detector serves multiple purposes: controlling sample flow for detection and directing solvent flow for recycling or discharge, thus improving adaptability without adding external components.
2Adaptability or versatility
If an external switching valve is added to enable solvent recycling, then solvent reuse capability is improved, but installation area increases
Solution Approach 1:
By integrating the switching mechanism into the detector body, the patent eliminates the need for separate external switching valves and associated piping. This consolidation significantly reduces the installation area required for solvent recycling functionality while maintaining full operational capability.
3Adaptability or versatility
If an external switching valve is added to enable solvent recycling, then solvent reuse capability is improved, but sample diffusion increases
Solution Approach 1:
The integrated switching mechanism ensures that the solvent recycling function is achieved with minimal additional dead volume. By incorporating the switching valve within the detector body rather than externally, the patent minimizes the volume of stagnant liquid where sample diffusion could occur, thereby preserving sample integrity and analysis accuracy.
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 solvent reuse without increasing costs or installation area, reduces sample diffusion effects on analysis results by minimizing dead volume and eliminating external valve complications.
Implementation Method 1
The optical path of the transmission light changes according to the refractive index difference between the sample cell and the reference cell. Accordingly, if the amount of displacement from a reference position of the slit image of the transmission light is detected
Data Source
AI summary
An embodiment of a refractive index detector includes a sample cell, a reference cell, a measurement section, a liquid inlet port, liquid outlet sections, and a switching mechanism. The inlet port leads to a sample cell inlet. A first outlet port and a second outlet port are for discharging a liquid. The switching mechanism includes a reference liquid supply mode for forming a channel for connecting a reference cell outlet to one of the first outlet port and the second outlet port while connecting a sample cell outlet to a reference cell inlet, and an analysis mode for forming a channel for connecting the sample cell outlet to one of the first outlet port and the second outlet port while sealing the reference cell outlet.