Water Filter Depletion Detection via Magnetic Sensor

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Solution Overview

Problem

Consumers face challenges in determining when the water treatment material in water treatment devices is depleted, leading to unreliable replacement guidelines and potential ineffective water treatment.

Innovation Solution

Incorporating a magnetic object with a magnetic field and a magnetic sensor circuit within the water treatment device, which senses the magnetic field strength to detect when the water treatment material is depleted to a threshold amount, providing notifications through wireless or visual signals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If general guidelines for replacing water treatment material are used, then consumers can follow simple replacement schedules, but the reliability of depletion detection is poor

Engineering Contradiction:
Improvedepletion detection reliabilityVSAvoiddetection system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces manual monitoring and general replacement guidelines with an automated magnetic detection system. The magnetic sensor circuit automatically detects the position of the magnetic object to determine water treatment material depletion, eliminating the need for consumers to follow unreliable general guidelines and perform manual assessment.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The water treatment device performs self-monitoring of its own material depletion status through the magnetic sensor circuit and magnetic object mechanism. The system automatically detects when the water treatment material is depleted and provides notifications without requiring external monitoring or complex consumer intervention.

Inventive Principle:
Principle #25Self-service

2Measurement precision

If magnetic sensor circuit and magnetic object are added to detect depletion, then depletion detection accuracy is improved, but device complexity increases

Engineering Contradiction:
Improvedepletion detection precisionVSAvoiddevice structural complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The magnetic object is positioned specifically at the bottom of the brine tank, and the magnetic sensor circuit is positioned at a specific location on the housing to detect its movement. This localized placement of magnetic components provides precise depletion detection without requiring complex sensor arrays or sophisticated detection mechanisms throughout the entire device.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The magnetic object serves as an intermediary between the water treatment material depletion state and the magnetic sensor circuit. As the brine level drops, the magnetic object moves closer to the sensor, translating the physical depletion state into a detectable magnetic field change without requiring direct contact or complex sensing of the brine itself.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Loss of time

If magnetic object moves closer to sensor as material depletes, then timely replacement notification is achieved, but manufacturing precision requirements increase

Engineering Contradiction:
Improvereplacement timing accuracyVSAvoidcomponent positioning precision
Core Design Contradiction:
Loss of timeVSManufacturing precision

Solution Approach 1:

The magnetic object is pre-positioned at the bottom of the brine tank during manufacturing, and the magnetic sensor circuit is pre-positioned at a predetermined location on the housing. This preliminary positioning ensures that as the brine depletes naturally over time, the magnetic object will automatically move toward the sensor at the correct moment to trigger the notification, achieving timely replacement alerts without requiring active control or continuous adjustment.

Inventive Principle:
Principle #10Preliminary action

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 timely replacement of the water treatment material, ensuring continuous effective water treatment and preventing damage to downstream devices by accurately detecting depletion levels.

Implementation Method 1

a magnetic object having a magnetic field, where the magnetic object rests on the water treatment material. The water treatment device also includes a magnetic sensor circuit that senses the magnetic field of the magnetic object.

Methodology Applied
Scientific EffectMagnetic field: Magnetic Field

Data Source

PatentUS10604421B2Water treatment with notification
Publication Date: 2020.03.31 RHEEM MFG CO
  • US10604421B2 patent drawing
  • US10604421B2 patent drawing
  • US10604421B2 patent drawing

AI summary

A water treatment device includes a water treatment material contained within a housing of the water treatment device. The incoming water is exposed to the water treatment material to produce treated water. A magnetic field-based or a light-based sensor may determine an amount of the water treatment material remaining in the water treatment device and provide notification.