Anti-drip filter assembly
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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 replacement, necessitating frequent replacement every six months, which is inconvenient and prone to spills.
Innovation Solution
A filter assembly with a capillary passage and spool valve system that maintains water surface tension to prevent spills during filter cartridge removal, featuring a tension ridge on the end cap to control fluid flow and a rotatable spool body for easy valve operation, ensuring efficient filtration and reduced leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the filter cartridge is removed from the manifold, then the filter can be replaced for maintenance, but water spills from the manifold during removal
Solution Approach 1:
The spool valve is rotated to the closed position before the filter cartridge is removed from the manifold. This preliminary action of closing the valve prevents water from flowing into the manifold and spilling during filter replacement, allowing maintenance to proceed without water loss or mess
Solution Approach 2:
The filter cartridge is extracted from the manifold assembly for replacement. By separating the filter cartridge from the manifold, the system allows the filter to be maintained independently while the spool valve remains in place to control water flow and prevent spills during this extraction process
2Loss of substance
If the spool valve is actuated to terminate water flow, then water spill is limited, but the operation becomes time consuming and inconvenient
Solution Approach 1:
The spool valve is rotated to the closed position before filter removal begins. This preliminary closure of the valve prevents water flow in advance, eliminating the need for time-consuming valve actuation during the filter replacement process and preventing water spills simultaneously
Solution Approach 2:
The spool valve provides dynamic control of water flow by allowing the user to rotate it between open and closed positions. This dynamic mechanism enables quick termination of water flow when needed, reducing both water spill and time loss compared to static valve designs
3Reliability
If the filter medium pores become clogged or saturated, then filtering capacity decreases, but frequent replacement increases maintenance time and cost
Solution Approach 1:
The filter cartridge is designed to be easily removed and replaced from the manifold. When the filter medium becomes clogged or saturated and filtering capacity decreases, the entire filter cartridge can be quickly discarded and replaced with a new one, minimizing maintenance time and restoring filtering capacity efficiently
Solution Approach 2:
The spool valve is closed before filter removal to prevent water spill during the replacement process. This preliminary action allows the filter to be replaced more frequently if needed without incurring the penalty of messy water spills, making the maintenance process cleaner and potentially faster
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 effectively prevents water spills during filter replacement, maintains filtration efficiency, and allows for convenient maintenance, reducing the frequency of filter changes and minimizing water loss.
Implementation Method 1
The filter assembly may define a capillary passage directing a fluid flow along the filtration path. The capillary passage may have a passage width equal to or less than a capillary width of water therein.
Implementation Method 2
The filter assembly may define a capillary passage directing a fluid flow along the filtration path. The capillary passage may have a passage width equal to or less than a capillary width of water therein.
Implementation Method 3
The water filter's filtering media can adsorb or remove contaminants such as chlorine and lead from water prior to delivering such water to a user.
Implementation Method 4
volatile organic compounds such as chloroform, lindane, and atrazine can be adsorbed into pore surfaces as water moves through the filter
Implementation Method 5
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.
Data Source
AI summary
An anti-drip filter assembly is provided herein. The filter assembly may define a filtration path between a fluid inlet and a fluid outlet. The filter assembly may include a filter medium and an end cap. The filter medium may define a filtered volume and unfiltered volume. The filter medium may extend along an axial direction between a first end and a second end. The first end may be proximal the fluid inlet and fluid outlet, and the second end may be distal the fluid inlet and the fluid outlet. The end cap may be disposed on the first end of the filter medium. Moreover, the filter assembly may define a capillary passage directing a fluid flow along the filtration path. The capillary passage may have a passage width equal to or less than a capillary width of water therein.