RFID Water Leak Detection for Refrigerator Filters
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Solution Overview
Problem
Water filter assemblies in refrigerators often experience leaks due to improper installation or high water pressures, which can be difficult to detect visually, leading to operational issues and potential damage.
Innovation Solution
A system using an RFID tag and reader that establishes signal communication and monitors for disruptions caused by liquid water, allowing for non-visual detection of leaks by determining if liquid water is present between or on the RFID components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual monitoring is used to detect water leaks, then the detection method is simple, but the detection effectiveness is poor due to remote location and infrequent monitoring
Solution Approach 1:
The patent replaces visual monitoring (mechanical/optical system) with RFID electromagnetic signal communication to detect water leaks. The RFID reader and tag establish signal communication, and liquid water disruption of this signal provides automatic detection without requiring visual observation by users.
Solution Approach 2:
The patent introduces RFID signal communication as an intermediary between the water filter assembly and the detection system. The RFID tag mounted on the filter cartridge and reader at the manifold create an indirect detection mechanism where liquid water acts as the intermediary that disrupts the electromagnetic signal, enabling remote leak detection.
2Ease of operation
If RFID signal communication is used to detect liquid water, then non-visual detection is achieved, but the system complexity increases
Solution Approach 1:
The system performs self-service leak detection automatically. The RFID reader continuously monitors signal communication with the tag, and when liquid water disrupts the signal, the system automatically determines water presence and can notify users without requiring manual inspection or complex user intervention.
Solution Approach 2:
The RFID system serves multiple functions: it tracks filter cartridge installation/removal, monitors for liquid water leaks, and provides automatic notification. This multi-functionality consolidates several detection needs into a single system, reducing overall operational complexity despite the added technology.
3Ease of repair
If filter cartridges are removably mounted to manifolds, then replacement and servicing is enabled, but water leaks can form at the interface connection
Solution Approach 1:
The RFID tag is pre-mounted on the filter cartridge and the reader is pre-installed at the manifold before any potential leak issues arise. This preliminary setup enables continuous monitoring of the connection interface, allowing detection of liquid water at the mounting interface before significant damage occurs, while maintaining the removable design for easy replacement.
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
Effectively detects liquid water leaks without visual observation, providing timely notification to prevent damage and ensure the proper operation of water filter assemblies.
Implementation Method 1
establishing signal communication between an RFID tag and an RFID reader
Data Source
AI summary
The present subject matter provides a system and a method for detecting liquid water. The method includes establishing signal communication between an RFID tag and an RFID reader, monitoring the signal communication between the RFID tag and the RFID reader and determining that liquid water is disposed between the RFID tag and the RFID reader or on the RFID tag if the signal communication between the RFID tag and the RFID reader is disrupted, interrupted or terminated.