Dispensing Valve Flow Limiter Converter for Backflow Prevention
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Solution Overview
Problem
Existing dispensing systems for water treatment in pools lack a convenient and cost-effective way to convert from a normally open to a normally closed dispensing valve configuration when replacing cartridges, leading to potential backflow issues during cartridge replacement.
Innovation Solution
A consumer-friendly converter with flow limiters that can be securely mounted within the dispensing valve, allowing it to change from a normally open to a normally closed configuration without tools, using frictional engagement and deactivator mechanisms to prevent backflow when cartridges are removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a normally open dispensing valve is used, then the valve allows continuous flow during operation, but it causes backflow and potential spills when cartridges are removed
Solution Approach 1:
The valve transitions from a static normally open configuration to a dynamic system that automatically changes state based on cartridge presence. The flow limiter mechanism responds to the removal of the cartridge by closing the valve, preventing backflow while maintaining ease of operation during cartridge replacement.
Solution Approach 2:
A flow limiter converter is introduced as an intermediary component between the water supply and the dispensing cartridge. This converter contains a valve that mediates the flow control, automatically closing when the cartridge is removed, thus eliminating backflow risks without complicating the cartridge replacement process.
2Object-affected harmful factors
If a normally closed dispensing valve is used, then backflow is prevented during cartridge removal, but it requires additional conversion steps and complexity
Solution Approach 1:
The system is divided into separate functional components: the existing dispensing valve, the removable dispensing cartridge, and the flow limiter converter. This segmentation allows the flow limiter to be added as a modular component that automatically provides normally closed functionality during cartridge removal without requiring complex conversion of the entire valve system.
Solution Approach 2:
The flow limiter converter is designed to automatically respond to cartridge removal without requiring manual intervention or complex conversion steps. The valve within the converter self-activates to close when the cartridge is removed, providing backflow prevention automatically and simplifying the overall system complexity.
3Reliability
If flow limiters are added to convert to normally closed valve, then backflow is prevented, but the device structure becomes more complex
Solution Approach 1:
The flow limiter converter is designed to nest within the existing dispensing valve structure. The converter fits into the valve body and works in conjunction with the existing cartridge insertion mechanism, eliminating the need for separate mounting steps and reducing overall device complexity while maintaining reliable backflow prevention.
Solution Approach 2:
The flow limiter functionality is merged with the existing dispensing valve structure. The converter integrates the valve closure mechanism with the cartridge replacement process, so that the same structural elements serve dual purposes: dispensing during operation and preventing backflow during cartridge removal, thereby reducing overall complexity.
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
Enables on-the-go conversion of dispensing valves to a flow-limiting mode, preventing backflow and minimizing the risk of spills or injuries during cartridge replacement, while maintaining normal operation when cartridges are installed, and allowing for easy resizing and upgrading of dispensing systems.
Implementation Method 1
The flow limiter is normally maintainable in a closed condition through the pressure forces acting on an underside of the flow limiter
Implementation Method 2
using frictional engagement and deactivator mechanisms to prevent backflow when cartridges are removed
Data Source
AI summary
A system for limiting the flow from a dispensing valve when a dispensing cartridge is replaced with the system including a dispenser cartridge with a cam and a water socket with a flow limiter therein that is activeable in response to the position of the dispenser cartridge in the dispensing valve and operable in response to an upstream fluid pressure in the dispensing valve.