Rotating Photoreactor Platform for Uniform Light and Stirring
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Solution Overview
Problem
High-throughput photoreactors face challenges in ensuring uniform light exposure and homogeneous stirring of samples, particularly in heterogeneous mixtures, due to fixed sample positions and orthogonal stirring mechanisms, which can lead to uneven light distribution and overexposure.
Innovation Solution
A device with a rotating platform that allows samples to follow a periodic circular path relative to the light source, featuring individual magnetic stirring mechanisms and interchangeable locking parts for various container shapes, along with cooling and gas reservoir integration, ensuring uniform light intensity and homogeneous mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If samples are arranged in a fixed geometric pattern within the photoreactor, then the device structure is simple, but the light exposure is non-uniform across samples
Solution Approach 1:
The patent applies the dynamics principle by rotating the sample plate at a controlled speed during irradiation. This dynamic motion ensures that all samples pass through different positions relative to the light source, receiving uniform average light exposure over time, thereby resolving the non-uniform illumination problem while maintaining a relatively simple device structure.
Solution Approach 2:
The patent implements periodic action through the rotational movement of the sample plate. The continuous rotation creates a periodic cycle where each sample repeatedly passes through various distances from the light source, ensuring that over one complete rotation cycle, all samples receive equivalent average light exposure, thus achieving uniform illumination.
2Productivity
If the number of samples is increased to achieve high-throughput screening, then productivity is improved, but light distribution uniformity deteriorates
Solution Approach 1:
By rotating the sample plate, the patent enables a larger number of samples to be processed simultaneously while maintaining uniform light distribution. The rotational dynamics ensure that even with increased sample density on the plate, each sample receives equivalent average illumination over time, thus achieving both high throughput and uniform light distribution.
3Device complexity
If orthogonal stirring mechanisms are used in rotating photoreactors, then device complexity is reduced, but homogeneous mixing of heterogeneous samples is insufficient
Solution Approach 1:
The patent employs asymmetric magnetic stirrers with non-circular geometries that create effective vortex patterns when rotated by magnetic fields. This asymmetric design generates superior mixing performance for heterogeneous samples compared to traditional orthogonal stirring mechanisms, achieving homogeneous composition while maintaining relatively simple device structure.
Solution Approach 2:
The patent replaces mechanical contact-based stirring mechanisms with a magnetic field-driven stirring system. The magnetic stirrers are actuated by external magnetic fields, eliminating the need for mechanical drive shafts and seals, thus reducing device complexity while achieving effective homogeneous mixing of heterogeneous samples.
4Productivity
If samples are positioned closer to the light source to increase reaction speed, then reaction efficiency is improved, but overexposure and secondary reactions increase
Solution Approach 1:
The rotating sample plate dynamically adjusts the instantaneous distance between samples and the light source during rotation. This allows samples to spend part of the time closer to the light source (increasing reaction speed) and part of the time farther away (reducing overexposure), achieving an optimal balance that prevents harmful secondary reactions while maintaining high productivity.
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
Achieves uniform light exposure and homogeneous stirring across all samples, even in heterogeneous mixtures, by allowing samples to maintain a consistent average distance from the light source and preventing overexposure through independent stirring control.
Implementation Method 1
each stirring mechanism being arranged on the rotating platform, next to each first receiving element, and being adapted for magnetically stirring its corresponding container from below
Implementation Method 2
The amount of light that a point (I) receives is inversely proportional to the distance separating that point from the light source
Data Source
Figure 1a~2A
Figure 2B~2C
Figure 2D~2E
AI summary
A device for carrying out chemical reactions. The device comprises a rotating platform configured for rotating around a central axis thereof, the rotating platform comprising a plurality of first receiving elements, each of which is designed for receiving one container; and a plurality of stirring mechanisms. Each stirring mechanism of the plurality of stirring mechanisms is arranged on or below each retaining element for magnetically stirring its corresponding container from below. The device further comprises a support for a light source, said support being fixedly arranged on the device, in such a way that, when the light source is secured on the support, light is radiated towards the rotating platform, laterally impinging on each container, when the latter passes in front of the support.