Refrigerator Water Filter Purge Prompt and Life Tracking

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Solution Overview

Problem

Existing refrigerators lack an efficient method to ensure proper operation of water filters after installation, particularly in ensuring air is purged and providing users with timely reminders for filter replacement based on usage.

Innovation Solution

A refrigerator system that includes a sensor to detect new water filters, a user interface to prompt purging, and a memory unit to track water flow and filter life, ensuring air is purged and alerting users when replacement is necessary.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a water filter is installed in the refrigerator, then water filtration function is improved, but air may remain in the filter causing improper operation

Engineering Contradiction:
Improvewater filter operationVSAvoidair in filter
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The system performs preliminary purging action automatically after filter installation by detecting the new filter via sensor and activating the water pump to force water through the filter, displacing air before normal operation begins

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system uses a sensor to detect when a new filter is installed and provides feedback to the controller, which then initiates the purging sequence and later confirms when purging is complete based on flow sensors detecting proper water flow

Inventive Principle:
Principle #23Feedback

2Reliability

If users are not reminded to replace filters, then device complexity is reduced, but filter effectiveness deteriorates over time

Engineering Contradiction:
Improvefilter effectivenessVSAvoidmonitoring system
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The water filter assembly includes an integrated flow sensor and memory unit that automatically track water flow through the filter, calculate usage, and generate replacement reminders without requiring external monitoring systems

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The controller receives feedback from the flow sensor about water usage and from the memory unit about filter age, then provides feedback to the user interface to alert users when filter replacement is needed based on either time or water volume thresholds

Inventive Principle:
Principle #23Feedback

3Reliability

If manual purging is required after filter installation, then ease of operation is reduced, but proper filter operation is ensured

Engineering Contradiction:
Improvefilter operationVSAvoidfilter installation
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The system automatically detects new filter installation via sensor and initiates the purging sequence without user intervention, using the water pump to force water through the filter and displacing air automatically

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The controller monitors the purging process through flow sensors and provides feedback to the user interface, notifying users when purging is complete and normal operation can resume

Inventive Principle:
Principle #23Feedback

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

Ensures proper operation of water filters by purging air and providing timely reminders for replacement, enhancing user convenience and maintaining filter effectiveness.

Implementation Method 1

A replaceable water filter unit is detachably connected to the fluid conduit whereby water flowing through the conduit is filtered by the water filter

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Implementation Method 2

Purging involves causing water to flow into and through the water filter, thereby displacing air in the water filter

Methodology Applied
Scientific EffectFluid displacement: Pressure Gradient

Data Source

PatentUS9366474B2Water filtration purge indication
Publication Date: 2016.06.14 WHIRLPOOL CORP
  • US9366474B2 patent drawing
  • US9366474B2 patent drawing
  • US9366474B2 patent drawing

AI summary

A refrigeration system includes a water circulation system and a replaceable water filter. The refrigerator includes a sensor that determines if a water filter is present, and a user interface that prompts a user to purge a water filter upon installation of a new water filter in the refrigerator. The water filter may include a memory storage device that stores information concerning the allowable life of the water filter, the remaining life of the water filter, and other information. Information concerning the remaining life of the water filter and other information can be displayed or otherwise communicated to a user by the user interface.