Magnetic Float Pitcher Fill Control to Prevent RO Water Waste
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Solution Overview
Problem
Reverse-osmosis (RO) systems waste significant amounts of water due to continuous flow requirements to prevent membrane clogging, and existing point-of-use (POU) water filtration devices do not efficiently manage water transfer based on container fill levels.
Innovation Solution
A filter device with a magnetic float assembly and sensor system that controls fluid transfer based on the pitcher's fill level, using a Reed switch to detect the float's position and control the pump accordingly, ensuring water is only transferred when the pitcher is not full.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous water flow is maintained across the membrane surface, then membrane clogging is prevented, but water waste increases significantly (3-4 gallons wasted per gallon treated)
Solution Approach 1:
The system uses a magnetic float that rises and falls periodically with water level changes in the storage container. When the float reaches a certain height, it triggers a Reed switch that stops the pump operation. This periodic on-off action allows the system to maintain membrane flushing when needed while stopping water transfer when the container is full, thereby preventing membrane clogging while reducing water waste.
Solution Approach 2:
The magnetic float assembly works with a Reed switch to create a feedback control system. The float's position (determined by water level) provides feedback to the pump controller, which adjusts water transfer accordingly. This feedback mechanism ensures water flow continues across the membrane to prevent clogging, but automatically stops when the storage container reaches capacity, optimizing water usage.
2Ease of operation
If water is continuously transferred from source to storage container, then water availability is ensured, but overflow waste occurs when container is full
Solution Approach 1:
The magnetic float assembly automatically detects when the storage container is full and triggers the pump to stop via the Reed switch, without requiring manual intervention. The system serves itself by using the water level (via float position) to control the water transfer process, ensuring water availability when needed while preventing overflow waste when the container is full.
3Loss of substance
If magnetic float assembly with Reed switch is added to control water transfer, then water waste is reduced, but device complexity increases
Solution Approach 1:
The system replaces complex electronic level sensing and control mechanisms with a simple magnetic float assembly and Reed switch combination. The magnetic float uses buoyancy (mechanical principle) to rise and fall with water level, and the Reed switch provides simple magnetic field-based on/off control. This substitution reduces device complexity while achieving effective water waste reduction compared to more complex electronic control systems.
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
The system efficiently manages water transfer, reducing waste by stopping fluid flow when the pitcher is full, thus optimizing water usage and preventing membrane clogging.
Implementation Method 1
a magnetic float assembly having a magnetic float that moves responsive to the level of fluid within the pitcher body
Implementation Method 2
A filter device with a magnetic float assembly and sensor system that controls fluid transfer based on the pitcher's fill level, using a Reed switch to detect the float's position
Implementation Method 3
the controller may cause the pump to pump fluid from the fluid source, through the filtration system, and into then pitcher
Implementation Method 4
a filtration system such that the controller may cause the pump to pump fluid from the fluid source, through the filtration system, and into then pitcher
Data Source
AI summary
A filter device and methods of use thereof are provided. The filter device may include a pitcher for removably engaging with a base in fluid communication with a fluid source. The pitcher may include a magnetic float assembly, and the base may include a sensor, e.g., a Reed switch, for detecting when a magnetic float of the magnetic float assembly is within a detectable range of the sensor. Upon detection of the magnetic float within the detectable range by the sensor, a controller of the filter device may instruct a pump to pump fluid from the fluid source, through a filtration system of the filter device, and into the pitcher. When the pitcher is full of fluid, the magnetic float will be out of the detectable range of the sensor, such that fluid will stop being transferred from the fluid source to the pitcher.