Microchip Electrophoresis Cooling Control for Temperature Stability
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Solution Overview
Problem
Microchips in electrophoresis systems face challenges in maintaining optimal temperature due to their higher heat capacity compared to capillaries, making it difficult to control temperature effectively during voltage application, which affects the efficiency and accuracy of the electrophoresis process.
Innovation Solution
An analysis apparatus with a cooling unit, voltage application unit, and optical analysis unit that controls the microchip's temperature by pre-cooling it before electrophoresis, using a combination of cooling methods such as electron cooling elements, air blowing devices, and heat pipes, and adjusting cooling output based on temperature sensors to maintain optimal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling apparatus is arranged and operated for microchips, then cooling function is provided, but the microchip temperature cannot be kept within the optimal range due to high heat capacity
Solution Approach 1:
The system performs preliminary cooling of the microchip before voltage application begins. The control unit activates the cooling apparatus in advance to reduce the microchip temperature to within the optimal range, ensuring that when electrophoresis starts, the temperature is already controlled and stable, preventing overheating during the analysis process.
Solution Approach 2:
The cooling apparatus operates dynamically with adjustable output levels. The control unit can increase cooling output immediately before voltage application and reduce output after operations end, adapting the cooling intensity to the thermal state and operational phase of the microchip, thereby maintaining optimal temperature control throughout the process.
2Productivity
If voltage is applied to the microchip for electrophoresis, then analysis function is enabled, but temperature rises due to heat generation
Solution Approach 1:
The system applies preliminary cooling action before voltage application to counteract the heat that will be generated during electrophoresis. By reducing the microchip temperature in advance, the system creates a thermal buffer that prevents excessive temperature rise during the analysis process, maintaining optimal conditions for electrophoresis while enabling productive analysis.
Solution Approach 2:
The cooling apparatus operates continuously throughout the electrophoresis process, maintaining constant temperature control during voltage application. The control unit ensures that cooling action persists throughout the entire analysis period, preventing temperature accumulation and maintaining stable thermal conditions for continuous productive analysis.
3Temperature
If cooling output is increased before voltage application, then temperature control is improved, but energy consumption increases
Solution Approach 1:
The cooling apparatus operates with dynamic output adjustment rather than constant high-power operation. The control unit increases cooling output immediately before voltage application when cooling is most needed, then reduces output after operations end, matching the cooling demand to the actual thermal requirements of each operational phase, thereby improving temperature control efficiency while reducing unnecessary energy consumption.
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 approach effectively suppresses temperature rises during electrophoresis, ensuring the microchip is adequately cooled before analysis, optimizing temperature control and improving the efficiency and reliability of the electrophoresis process.
Implementation Method 1
a cooling unit that cools the microchip
Implementation Method 2
a voltage application unit that applies voltage to a buffer solution filled in the channel of the microchip
Implementation Method 3
an optical analysis unit that conducts, through the microchip, optical analysis of a sample introduced in the channel
Data Source
Figure 1
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Figure 3
AI summary
An analysis apparatus (10) is an apparatus that performs electrophoresis using a microchip (30) provided with a channel. The analysis apparatus (10) includes a cooling unit (an electron cooling element (12) and a driving circuit (13)) that cools the microchip (30), a voltage application unit (electrodes (14a, 14b) and a power supply circuit (15)) that applies voltage to a buffer solution filled in the channel (32) of the microchip (30), an optical analysis unit (a light source (16), a light receiving element (17), and an analysis unit (18)) that conducts, through the microchip (30), optical analysis of a sample introduced in the channel (32), and a control unit (20) that controls the cooling unit, the voltage application unit, and the optical analysis unit. The control unit (20) causes the cooling unit to start cooling the microchip (30), and after the microchip (30) has been cooled, causes the voltage application unit and the optical analysis unit to operate.