Fluid Control Unit for Pressure-Regulated Sample Processing
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Solution Overview
Problem
Existing bioreactors face challenges in optimizing the cell incubation environment, particularly in smaller scales, as they struggle with uniform mixture and dynamic control of oxygen and pH levels, leading to suboptimal cell growth and limited scalability.
Innovation Solution
A fluid control device with a control unit that separates the treatment device from the processing device, allowing for independent control of fluid processing and environmental conditions, using positive and negative pressures to manage gas flow and mixture, and integrated sensors for real-time adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static culture is used in 96-well plates, then device complexity is reduced, but uniform mixture and oxygen distribution are insufficient
Solution Approach 1:
The system applies periodic shaking at controlled frequencies and amplitudes to achieve uniform mixture and oxygen distribution in 96-well plates. The shaking mechanism is activated periodically rather than continuously, maintaining culture uniformity while minimizing device complexity and energy consumption.
Solution Approach 2:
The system uses pneumatic pressure control to regulate gas flow and liquid levels in the bioreactor chamber. Pressure sensors and control valves maintain optimal oxygen levels and culture fluid dynamics without requiring complex mechanical mixing components in each well plate.
2Stability of the object's composition
If quick shake at high speed is used to achieve uniform mixture, then mixture effect is improved, but optical sensor integration becomes difficult
Solution Approach 1:
Instead of continuous high-speed shaking, the system uses periodic shaking at controlled frequencies. This creates sufficient mixing for uniformity while allowing optical sensors to detect signals during the stationary phases of the periodic cycle, enabling successful sensor integration and real-time monitoring.
Solution Approach 2:
Optical sensors provide real-time feedback on cell growth and culture conditions. The sensor data is used to adjust shaking parameters and pressure control dynamically, achieving uniform mixture while maintaining conditions suitable for optical detection.
3Productivity
If bioreactor size is reduced to microliter level, then scalability is improved, but ability to achieve uniform mixture and dynamic control is lost
Solution Approach 1:
The system employs precise pneumatic pressure control to achieve uniform liquid distribution and gas exchange in microliter-scale bioreactors. Pressure-regulated gas flow ensures adequate oxygen supply and metabolite removal even in the smallest culture volumes, maintaining control reliability at scaled-down sizes.
Solution Approach 2:
Periodic shaking at optimized frequencies creates effective mixing in microliter volumes without requiring high speeds that would compromise sensor integration. The periodic motion ensures uniform distribution of nutrients and oxygen while maintaining culture homogeneity in small-scale bioreactors.
4Device complexity
If control unit integrates multiple functions, then device complexity is reduced, but ability to separately optimize processing and environmental control is limited
Solution Approach 1:
The control unit is designed as a multi-functional integrated system that manages both fluid processing (shaking, pressure control) and environmental parameters (temperature, gas composition). This universal controller reduces overall device complexity while maintaining the ability to independently optimize each function through software control and sensor feedback.
Solution Approach 2:
Multiple sensors monitor culture conditions and provide feedback to the integrated control unit. The controller dynamically adjusts shaking parameters, pressure, and gas flow based on real-time measurements, enabling independent optimization of each control aspect even within a unified system architecture.
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
Enhances cell growth productivity by ensuring uniform mixture and precise control of environmental conditions, enabling scalable and efficient bioreactor operations across various scales, including microliter levels.
Implementation Method 1
a pressure unit (2) for providing positive and/or negative pressure
Implementation Method 2
integrate optical sensors. Detection of optical signals cannot be performed during quick shake
Data Source
Figure 1(A)~1(B)
Figure 2
Figure 3
AI summary
The invention relates to a control unit for a fluid control device wherein the control unit comprises a pressure unit for providing positive and/or negative pressure, at least one first control unit outlet being fluidically connectable to a processing device comprising at least one receptacle for receiving a fluid sample, at least one second control unit outlet being fluidically connectable to a treatment device having a chamber for receiving the processing device, and a connection unit by means of which the pressure unit is fluidically connectable or connected with the first control unit outlet and/or with the second control unit outlet wherein the control unit is adapted to control the processing of the fluid sample in the processing device by applying a positive or negative pressure provided by the pressure unit to the first control unit outlet by means of the connection unit and to control a physical state in the chamber of the treatment device.