Multi-Side Heating Elements for Rapid PCR Thermal Cycling
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Solution Overview
Problem
Current PCR devices are slow in temperature cycling, lack uniformity, and often can only process one sample at a time, leading to inefficiencies and reduced output in molecular biology applications.
Innovation Solution
A thermal cycling device with a microfluidic fluid chamber surrounded by a heating element on multiple sides, an insulating layer, and a conductive body, which allows for rapid and uniform temperature changes, enabling simultaneous processing of multiple samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a heating element is placed on only one side of the fluid chamber, then the device structure is simple, but the temperature distribution is non-uniform and heating speed is slow
Solution Approach 1:
The heating element is configured to surround multiple sides (at least two opposite sides) of the fluid chamber, transitioning from one-dimensional heating to multi-dimensional heating. This dimensional change enables heat to penetrate the fluid from multiple directions simultaneously, dramatically increasing heating speed and achieving uniform temperature distribution throughout the fluid volume.
2Manufacturing precision
If heating elements surround multiple sides of the fluid chamber, then temperature uniformity improves, but device complexity increases
Solution Approach 1:
The heating element is designed with different heating zones corresponding to different sides of the fluid chamber. Each heating zone can be independently controlled to provide localized heating where needed, ensuring uniform temperature distribution across the entire fluid volume while optimizing energy efficiency and reducing overall system complexity.
3Productivity
If conventional PCR devices process one sample at a time, then device complexity is low, but productivity is limited
Solution Approach 1:
Multiple fluid chambers are integrated into a single device structure, allowing simultaneous processing of multiple samples. The heating element is configured to surround and heat multiple chambers concurrently, enabling parallel PCR reactions while maintaining a unified device architecture that does not significantly increase overall system complexity.
4Productivity
If rapid temperature cycling is achieved through multi-side heating, then productivity increases, but energy loss increases
Solution Approach 1:
Temperature sensors are positioned to monitor the fluid temperature in real-time, and this temperature feedback is used to dynamically adjust the heating element power output. When the target temperature is reached, the heating power is automatically reduced or turned off, preventing overheating and minimizing energy waste while maintaining rapid thermal cycling capability.
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 solution achieves thermal cycling 100 times faster than existing devices, with more uniform temperature distributions, reduced waste heat, and the ability to process multiple samples in parallel, potentially completing a PCR run within a doctor's visit timeframe.
Implementation Method 1
a heating element surrounding multiple sides of a cross-sectional perimeter of the fluid chamber
Implementation Method 2
an insulator surrounding multiple sides of a cross-sectional perimeter of the heating element
Data Source
AI summary
In one example in accordance with the present disclosure, a thermal cycling device is described. The thermal cycling device includes a fluid chamber to retain a fluid. A heating element is disposed around multiple sides of a cross-sectional perimeter of the fluid chamber and an insulator is disposed around multiple sides of a cross-sectional perimeter of the heating element. The thermal cycling device also includes a conductive body disposed around multiple sides of a cross-sectional perimeter of the insulator.