Series Valve Liquid Supply Control With Pressure Leak Detection
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Solution Overview
Problem
Beverage forming systems that use valves to control liquid flow often experience leaks and failures, leading to unwanted and uncontrolled liquid delivery.
Innovation Solution
The use of at least two valves positioned in series, with a control circuit to monitor and control the flow, providing redundancy and allowing for leak detection through pressure sensors, ensures precise control and minimizes uncontrolled liquid delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single valve is used to control liquid flow, then the device complexity is low, but the reliability is poor due to leaks and failures
Solution Approach 1:
The single valve is segmented into multiple valves (first valve and second valve) positioned in series within the liquid supply. This segmentation allows each valve to perform the flow control function independently, so that if one valve fails or leaks, the other can still maintain control, thereby improving reliability while distributing the complexity across modular components.
Solution Approach 2:
The system incorporates pressure sensors that monitor the liquid pressure between the first and second valves beforehand. This allows the control circuit to detect potential leaks or failures before they cause uncontrolled liquid delivery, providing a cushioning effect against reliability failures by enabling preventive detection and response.
2Reliability
If multiple valves in series are used, then the reliability improves through redundancy, but the device complexity increases
Solution Approach 1:
The control circuit serves multiple functions: it controls both the first and second valves for flow regulation, monitors pressure sensors for leak detection, and coordinates the operation of multiple valves. By making the control circuit multi-functional, the patent reduces the need for separate control mechanisms for each valve, thereby managing complexity while maintaining the reliability benefits of multiple valves.
Solution Approach 2:
The control circuit merges the control functions for multiple valves and the leak detection function into a single integrated system. The pressure sensors are combined with the valve control mechanism, allowing the system to achieve reliable leak detection and flow control through a unified control architecture rather than separate independent systems.
3Measurement precision
If pressure sensors are added for leak detection, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
Pressure sensors are introduced as intermediary devices between the liquid supply and the control circuit. These sensors indirectly measure valve leakage by detecting pressure changes in the liquid, rather than directly monitoring valve seal integrity. This intermediary approach enables precise leak detection through pressure measurement while keeping the sensor implementation relatively simple and integrated into the existing fluid pathway.
Data Source
AI summary
Systems and methods for controlling liquid flow to the liquid supply of a beverage forming apparatus. The liquid supply may include two valves positioned in series for controlling a flow of a liquid into the liquid supply. Pressures upstream, between and/or downstream of the valves may be detected and used to determine if one or both of the valves leak when closed.