Refrigerator Filter Assembly With Spool Valve for Spill-Free Replacement
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Solution Overview
Problem
Existing water filters in refrigerator appliances face issues with bacterial growth and clogged pores, leading to decreased filtering capacity and messy filter replacements, necessitating frequent replacements every six months, which can be inconvenient and wasteful.
Innovation Solution
A filter assembly with a spool valve system that includes a rotatable spool body and integral male inlet and outlet ports on the manifold, allowing for easy switching between open and closed configurations to facilitate filter cartridge replacement without water spillage, using a design where the male ports are offset from the axis of rotation, enabling torque to be applied uniformly for easier rotation and reducing leakage through O-ring seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a valve is used to terminate water flow to the manifold during filter replacement, then water spillage is limited, but the operation becomes time consuming and inconvenient
Solution Approach 1:
The spool valve is pre-configured with inlet and outlet ports positioned such that when the spool body is rotated to the filter replacement position, the valve automatically closes the water supply to the manifold before the filter cartridge is removed. This preliminary closure of water flow prevents spillage without requiring manual valve operation during the replacement process.
Solution Approach 2:
The system uses the rotation of the spool valve body itself to control water flow. As the spool body rotates to facilitate filter cartridge removal, the positioned inlet and outlet ports automatically align to close the water supply path. The valve serves both the filtration control function and the water shut-off function through its own structural configuration, eliminating the need for separate manual intervention.
2Ease of operation
If the male inlet and outlet ports are mounted on the spool body, then torque can be applied uniformly for easier rotation, but the structural complexity increases
Solution Approach 1:
The inlet and outlet ports are integrated directly into the spool body structure rather than being separate components. This merging of functions allows the spool body to serve as both the rotating control element and the mounting structure for water flow paths. The uniform distribution of ports on the spool body enables balanced torque application during rotation while maintaining a compact design.
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 spool valve system allows for convenient and spill-free filter cartridge replacement, reducing maintenance time and preventing bacterial growth by ensuring continuous water flow control, thus maintaining effective filtration without the need for frequent replacements.
Implementation Method 1
The spool body is received in the housing such that the spool body is rotatable relative to the housing
Implementation Method 2
volatile organic compounds such as chloroform, lindane, and atrazine can be adsorbed into pore surfaces as water moves through the carbon block
Implementation Method 3
The block of activated carbon has pores that permit a flow of water through the block. By passing through the pores, contaminants such as sand, rust, and cysts within the flow of water can be mechanically filtered out of the water
Implementation Method 4
reducing leakage through O-ring seals
Data Source
AI summary
A filter assembly includes a manifold having a male inlet port and the male outlet port and a filter cartridge having a female inlet port and a female outlet port. The male inlet port and the male outlet port are mounted to a spool body such that the male inlet port and the male outlet port extend away from the spool body. The female inlet port and the female outlet port are mounted to a casing at an end portion of the casing. A related refrigerator appliance is also provided.