Filter assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Filter cartridges in water filter assemblies are prone to failure due to material fatigue and temperature-related issues, such as bursting from fluid pressure changes and freezing, which can lead to difficult detection of leaks and water loss, especially in remote locations like refrigerator appliances.
Innovation Solution
A filter assembly design with a manifold and a filter cartridge comprising two components joined at a failure interface, where the second component moves relative to the first upon failure, incorporating an RFID tag and reader to detect the failure by interrupting signal communication, and additional mechanisms like magnets or switches to trigger a valve closure, preventing further water flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the filter cartridge is positioned in remote locations within refrigerator appliances, then the water filtration system can be effectively integrated into the appliance structure, but detecting leaks and failures becomes difficult
Solution Approach 1:
The patent replaces manual visual inspection with an automated electronic detection system using RFID tags and readers. The RFID tag is mounted on the filter cartridge and the reader is positioned in the refrigerator appliance to wirelessly detect the tag's presence and status, enabling automatic leak and failure detection without requiring physical access to remote locations.
Solution Approach 2:
The patent introduces RFID technology as an intermediary between the filter cartridge and the detection system. The RFID tag acts as a mediator that carries identification and status information, while the RFID reader serves as an intermediary device that wirelessly communicates with the tag, bridging the gap between the remote filter cartridge and the monitoring system.
2Ease of manufacture
If the filter cartridge is made as a single integrated component, then the structure is simple and easy to manufacture, but failure detection and component movement are not detectable
Solution Approach 1:
The patent divides the filter cartridge into two separate components: a first component and a second component that can move relative to each other upon failure. This segmentation allows the system to detect failures through the relative movement of components while still maintaining manufacturing simplicity, as each component can be manufactured separately and then assembled.
Solution Approach 2:
The patent adds a spatial dimension to failure detection by creating a movable interface between the first and second components. The relative movement between components in space provides a detectable signal for failure, transforming an internal material failure into an observable positional change that can be detected by the RFID system.
3Reliability
If the RFID reader is positioned close to the RFID tag for reliable communication, then signal communication is maintained, but the system becomes more complex and harder to install
Solution Approach 1:
The RFID reader is designed with multi-functionality to reduce system complexity. The reader not only detects the RFID tag for identification purposes but also serves as the detection mechanism for filter cartridge status, failure conditions, and leak detection. This consolidation of functions into a single component simplifies the overall system architecture and installation.
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 early detection of filter cartridge failure, minimizing water leakage and allowing for timely termination of water flow, thus improving the reliability and maintenance of water filtration systems.
Implementation Method 1
An RFID tag mounted to the second cartridge component. An RFID reader is capable of signal communication with the RFID tag. The RFID reader is positioned and oriented such that signal communication between the RFID tag and the RFID reader is interrupted when the filter cartridge fails
Data Source
AI summary
A filter assembly includes a manifold and a filter cartridge removably mounted to the manifold. The filter cartridge includes a first cartridge component and a second cartridge component joined to the first cartridge component at a failure interface such that the second cartridge component moves relative to the first cartridge component when the filter cartridge fails.