Proportional Valve Dosing Device for Liquid Precision
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Solution Overview
Problem
Existing dosing devices for liquids lack the precision needed for accurate dosing, which is crucial in laboratory settings where small volumes of liquids need to be handled with high accuracy.
Innovation Solution
A dosing device with a channel plate that includes a fluid channel connected to a supply valve and an output valve, both of which are proportional valves controlled by a microprocessor. This setup allows for precise control over the fluid flow, enabling higher dosing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional dosing devices are used, then the device structure is simple, but the dosing precision is insufficient
Solution Approach 1:
The patent replaces conventional mechanical dosing mechanisms with a microprocessor-controlled proportional valve system. The proportional valve, controlled by electrical signals from a microprocessor, precisely regulates fluid flow through the channel plate, eliminating the need for complex mechanical dosing components while achieving high dosing precision.
Solution Approach 2:
The patent utilizes proportional valves that can continuously adjust their opening degree based on electrical control signals. This allows for precise control of fluid flow parameters (flow rate, pressure) through the channel plate, enabling accurate dosing of liquid volumes by dynamically changing flow parameters rather than relying on fixed mechanical configurations.
2Measurement precision
If proportional valves are used for precise control, then the dosing precision improves, but the device complexity increases
Solution Approach 1:
The microprocessor serves multiple functions: it controls the proportional valve, processes sensor signals, and manages the overall dosing process. This multi-functionality reduces the need for separate dedicated control components for each function, thereby managing complexity while achieving precise flow control through the channel plate.
Solution Approach 2:
The patent incorporates sensor signals that provide feedback to the microprocessor about the actual fluid flow conditions. This feedback mechanism allows the microprocessor to adjust the proportional valve positioning in real-time, ensuring precise flow control while simplifying the overall system through automated closed-loop control rather than complex mechanical feedback mechanisms.
Data Source
AI summary
Dosing device for dosing liquids, with a channel plate in which a fluid channel is formed that extends between a supply connection and an output connection, with a supply valve assigned to the supply connection and with an output valve assigned to the output connection, and with a controller which is electrically connected to the supply valve and the output valve. A tip coupling for coupling a pipetting tip is associated with the output connection and the supply valve and/or the output valve is/are designed as a proportional valve.