Reversible Filtration System with Backwash Cleaning
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Solution Overview
Problem
Conventional filtered water pitchers with charcoal activated filters require frequent filter replacements, are limited in capacity due to upper reservoir constraints, and rely on gravity for filtration, resulting in slow filling times.
Innovation Solution
A reversible fluid filtration system with a receiver unit and a filtration unit featuring a filter media between perforate end caps, allowing for reversible attachment and backwashing to clean the filter media, enabling efficient filtration and complete reservoir filling without gravity dependency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional charcoal activated filter is used in a filtered water pitcher, then filtration function is provided, but the filter must be replaced frequently when it becomes dirty
Solution Approach 1:
The filter cartridge is designed to be reversible, allowing the filtration media to be cleaned and reused. The system enables recovery of the filter by reversing it in the receiver unit, where backwash fluid flows through the filter media to remove accumulated contaminants, extending the filter's service life and reducing replacement frequency.
Solution Approach 2:
The filter system performs self-cleaning through the backwash mechanism. When the filter becomes clogged, reversing it allows the system to automatically flush contaminants from the filtration media using backwash fluid, enabling the filter to maintain its filtration function without manual intervention or replacement.
2Quantity of substance
If an upper reservoir is included in the filtered water pitcher, then filtration capacity is limited, but the pitcher cannot be fully filled
Solution Approach 1:
The traditional upper reservoir is eliminated from the design. Instead, the system uses a single reservoir that can be completely filled, with the filtration unit positioned to allow fluid to flow through the filter media without requiring a separate upper storage compartment, thereby maximizing the usable volume.
3Ease of operation
If gravity is used to drive filtration in the pitcher, then simple operation is achieved, but it takes a relatively long period of time to produce a pitcher full of filtered water
Solution Approach 1:
The system employs a pump to provide pressurized fluid flow through the filtration unit, replacing gravity-driven filtration. This hydraulic approach maintains ease of operation while significantly increasing the filling speed, allowing the reservoir to fill much faster than gravity alone would permit.
4Ease of repair
If the filtration unit is made reversible with removable attachment, then filter media can be cleaned, but device complexity increases
Solution Approach 1:
The filtration system is divided into separable components: a receiver unit and a removable filtration unit. This segmentation allows the filter media to be easily accessed and cleaned by simply removing the filtration unit from the receiver, providing maintenance capability without requiring complex disassembly or specialized tools.
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 system allows for efficient filtration, complete reservoir filling, and filter rejuvenation, reducing the need for frequent replacements and minimizing filling time, while maintaining a fluid-tight seal and effective filtration performance.
Implementation Method 1
fluid from the fluid source is forced through the filter media in a first direction and from the filter outlet
Implementation Method 2
fluid from the fluid source under pressure is forced through the filter media in a second direction opposite of the first direction, thereby removing at least a portion of material present on the filtration media
Implementation Method 3
The first side has a first sealing member configured for releasable engagement with a fluid delivery unit connected to a fluid source
Data Source
AI summary
A reversible fluid filtration system includes a receiver unit and a fluid filtration unit. The receiver unit has a first side and second side with a fluid channel therebetween. The fluid filtration unit includes filter media positioned between a first end and a second end. Openings in the first end are fluidly connected with the openings in the second end via the filter media. The first end and second end are independently attachable to the receiver unit via the second side. Attachment of the filtration unit first end to the receiver unit allows filtration of fluid entering the receiver unit fluid channel. Attachment of the filtration unit second end to the receiver unit allows fluid entering the receiver unit to remove solid material from the filter media and recharge the filter media.