Modified Ball Valve Gas Mixing With Sensor-Free Ratio Control
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Solution Overview
Problem
Existing gas mixers are complex, expensive, and prone to instability, making them impractical for emergency use due to reliance on sensors, regulating valves, and controllers, and require different designs for each gas combination, complicating installation and maintenance.
Innovation Solution
A modified three-way ball valve system with a microcontroller and servomotor that adjusts the position of a metal plate to mix gases, allowing for precise control of gas proportions and eliminating the need for multiple designs, using a single apparatus for various gas combinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors, regulating valves, and controllers are used to control gas mixing, then measurement precision and control accuracy are improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent removes sensors, regulating valves, and controllers from the gas mixing system. Instead of using these complex components for measurement and control, the invention uses a fixed ball valve mechanism with predetermined flow paths that inherently control gas mixing ratios through mechanical design alone, eliminating the need for electronic measurement and control systems.
Solution Approach 2:
The ball valve mechanism is designed to automatically control gas flow proportions based on its mechanical structure. The valve's position and internal geometry self-regulate the mixing ratios without requiring external sensors or controllers to monitor and adjust parameters, making the system self-controlling.
2Manufacturing precision
If different mixer designs are used for each gas combination, then manufacturing precision for specific gas mixing is improved, but adaptability to different gas combinations deteriorates
Solution Approach 1:
The patent designs a universal ball valve mechanism that can mix different gas combinations (oxygen with air, nitrogen with air, etc.) using the same fundamental structure. By changing only the gas input sources while keeping the valve mechanism unchanged, the system achieves precise mixing ratios for various gas pairs, making one device serve multiple gas mixing functions.
Solution Approach 2:
The invention maintains constant mechanical parameters of the ball valve while changing the gaseous parameters (different gas types and proportions). The fixed valve geometry provides consistent flow control characteristics that work across different gas combinations, allowing precision through parameter invariance rather than design changes.
3Productivity
If complicated control systems are used for gas mixing, then productivity and control capability are improved, but reliability deteriorates due to more failure points
Solution Approach 1:
The patent removes electronic control systems, sensors, and regulating valves that create multiple potential failure points. The reliability is improved by replacing these complex components with a simple mechanical ball valve system that has fewer moving parts and no electronic failures, while still maintaining control capability through its mechanical design.
Solution Approach 2:
The invention uses simple, inexpensive mechanical components (ball valve, connectors, tubing) instead of expensive, complex electronic control systems. While the electronic systems might offer advanced control, the mechanical system provides sufficient control for medical applications with much higher reliability and lower cost, accepting simplicity over sophisticated control.
4Adaptability or versatility
If multiple specialized mixer designs are used for different emergency situations, then adaptability to specific scenarios is improved, but device complexity and troubleshooting difficulty increase
Solution Approach 1:
The patent creates a single universal gas mixing apparatus that can handle various emergency respiratory therapy scenarios (different oxygen concentrations, different gas combinations) using one standardized ball valve mechanism. This eliminates the need for multiple specialized devices, reducing complexity while maintaining adaptability through flexible gas input connections and standardized output.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for proportional gas mixing. A method for mixing gas may include receiving, at a modified ball valve, a first gas via a first gas input port of the modified ball valve, and a second gas via a second gas input port of the modified ball valve. The method may also include coupling a motor control device with the modified ball valve. The method may further include operating the modified ball valve via the motor control device by adjusting a position of the modified ball valve. In addition, the method may include releasing a gas mixture of the first gas and the second gas through a gas output port of the modified ball valve.