Motorized Refrigerator Filter Cartridge Assembly for Easy Replacement
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Solution Overview
Problem
Existing water filter assemblies in refrigerator appliances are difficult to maintain due to high frictional forces during cartridge removal and installation, requiring significant force to overcome seal member friction and actuate check valves, making the process cumbersome and inefficient.
Innovation Solution
A filter assembly with a gear rack system and electric motor that moves the filter cartridge along an axial direction, allowing for automated positioning between fluid communication and non-communication states, facilitated by a controller and sensor system for easy replacement and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a quick disconnect system is used to mount the filter cartridge to the manifold, then the filter cartridge can be replaced or serviced, but significant force is required to overcome frictional forces during removal and installation
Solution Approach 1:
The patent replaces the manual mechanical system with an automated electromechanical system. An electric motor coupled to a gear mechanism automatically performs the cartridge installation and removal operations, eliminating the need for users to manually overcome high frictional forces. The motor-driven system provides controlled mechanical advantage to move the cartridge into and out of the manifold.
Solution Approach 2:
The patent introduces a gear mechanism as an intermediary between the electric motor and the filter cartridge. The gear system translates rotational motor motion into linear motion of the cartridge, providing mechanical advantage and controlled force application. This intermediary mechanism enables precise positioning and controlled engagement with the manifold.
2Reliability
If seal members are used to ensure fluid-tight connection between the filter cartridge and manifold, then filtering effectiveness is maintained, but frictional forces increase making cartridge removal difficult
Solution Approach 1:
The patent replaces manual cartridge removal with an automated motor-driven system. The electric motor provides sufficient force to overcome the friction created by seal members, while the gear mechanism ensures controlled, steady motion that prevents seal damage during removal operations.
Solution Approach 2:
The system performs its own maintenance operations automatically. The motor-driven mechanism enables the filter assembly to self-service by automatically removing and installing cartridges without requiring external manual intervention, thereby maintaining reliability while simplifying operation.
3Adaptability or versatility
If check valves are actuated during cartridge installation to ensure proper flow direction, then water flow control is improved, but the installation process becomes more complex requiring additional force
Solution Approach 1:
The patent merges multiple functions into a single automated operation. The motor-driven gear mechanism simultaneously performs cartridge positioning, seal compression, and check valve actuation in one continuous motion sequence. This integration simplifies the overall installation process despite the multiple functions being performed.
Solution Approach 2:
The automated electromechanical system replaces manual multi-step installation procedures. The motor control system coordinates the actuation of check valves and positioning of the cartridge in a programmed sequence, reducing operational complexity while maintaining proper water flow control functionality.
4Reliability
If manual force is applied during cartridge installation to compress seal members and actuate check valves, then proper sealing and flow control are achieved, but the process requires significant user effort and time
Solution Approach 1:
The patent replaces manual compression operations with an automated motor-driven system. The electric motor provides consistent, controlled force to compress seal members to the required degree, ensuring reliable sealing without requiring variable manual effort. This automation significantly reduces the time required for cartridge replacement.
Solution Approach 2:
The motor-driven system performs the entire cartridge installation or removal operation in one continuous automated sequence. The gear mechanism maintains continuous motion throughout the operation, eliminating the start-stop nature of manual operations and reducing total replacement time while ensuring proper seal compression throughout the process.
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 solution simplifies the process of replacing and installing filter cartridges by reducing manual force requirements and automating the process, ensuring efficient and hassle-free maintenance, thereby maintaining consistent water filtration quality.
Implementation Method 1
an electric motor configured to move the filter cartridge along an axial direction by rotating a gear coupled to the electric motor such that the gear meshes with the gear rack
Data Source
AI summary
A filter assembly includes a manifold having an inlet and outlet port. The filter assembly further includes a filter cartridge. The filter cartridge includes a casing and a filter casing disposed within the casing. The filter cartridge also includes a gear rack, and an inlet and outlet port. The filter assembly further includes an electric motor configured to move the filter cartridge along an axial direction by rotating a gear coupled to the electric motor such that the gear meshes with the gear rack. The filter cartridge is movable between a first position in which the filter cartridge and manifold are not in fluid communication, and a second position in which the filter cartridge and the manifold are in fluid communication. A refrigerator appliance having the filter assembly is also provided.