Portable Sink Layout With Gravity Drain and Backflow Valve
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Solution Overview
Problem
Existing portable sinks for the handicapped lack a practical solution for separating clean and dirty water efficiently, often requiring pumps and not addressing the need for durable, inexpensive, and compact designs with effective water management.
Innovation Solution
A portable sink assembly with separate compartments for clean and dirty water, utilizing a gravity flow system and a depressible one-way valve to prevent backflow, along with foldable legs and a rotatable faucet, allowing for easy storage, transportation, and water management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pump is used to move water in portable sinks, then water can be supplied to the basin, but the device complexity and manufacturing cost increase
Solution Approach 1:
The sink system uses gravity flow from the elevated clean water tank to automatically supply water to the basin without requiring a pump. The potential energy of elevated water creates sufficient pressure to flow through the faucet and into the basin, eliminating the need for mechanical pumping components.
Solution Approach 2:
The support means elevates the clean water tank to a higher potential energy level, creating a gravitational potential difference that drives water flow. This gravitational equipotential system replaces the need for mechanical energy input from a pump, simplifying the overall system.
2Reliability
If clean and dirty water are stored in separate tanks, then water contamination is prevented, but the device complexity and storage space requirements increase
Solution Approach 1:
The sink system is divided into functionally separate compartments: an elevated clean water tank for fresh water storage, a concave basin for washing activities, and a lower dirty water tank for waste collection. This segmentation prevents cross-contamination while maintaining a relatively simple integrated structure.
Solution Approach 2:
The system uses vertical spatial arrangement to separate clean and dirty water storage. The clean water tank is positioned at the top, the basin in the middle, and the dirty water tank at the bottom, utilizing the vertical dimension to achieve separation without requiring extensive horizontal space.
3Volume of moving object
If the sink is designed to be compact for storage and transport, then portability is improved, but access to tanks for refilling and emptying becomes difficult
Solution Approach 1:
The legs are designed to be foldable, allowing the sink to transition between an extended operational configuration (providing stability and access) and a collapsed compact configuration (for storage and transport). This dynamic structure resolves the contradiction between compactness and accessibility.
Solution Approach 2:
The dirty water tank is positioned at the bottom and can be independently accessed and removed from the main structure. This extraction capability allows the tank to be emptied without moving the entire sink, facilitating maintenance while maintaining a compact overall design.
4Reliability
If a one-way valve is added to prevent dirty water backflow, then contamination is prevented, but the device complexity increases
Solution Approach 1:
The one-way valve between the concave basin and dirty water tank operates automatically based on pressure differential. When the basin is full, water pressure closes the valve to prevent backflow into the clean basin. When the dirty water tank needs draining, the valve opens automatically, requiring no external control mechanism.
Solution Approach 2:
The one-way valve acts as an intermediary component that passively regulates water flow between the basin and dirty water tank based on pressure conditions, providing automatic backflow prevention without requiring complex control systems or user intervention.
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 provides a durable, cost-effective, and compact portable sink with efficient water separation, eliminating the need for pumps and facilitating easy water refilling and disposal, while ensuring clean water supply and dirty water containment.
Implementation Method 1
The sinks incorporate a gravity flow system that eliminates the need for a pump
Implementation Method 2
A separate depressor constructed and arranged for manually depressing the valve is also provided for opening the valve to drain the dirty water from the basin and into the second storage tank
Data Source
AI summary
A portable sink includes first and second storage tanks for storing clean and dirty water respectively and a concave basin between the two tanks. The sink also includes a plastic base member that supports the clean water tank above and to one side of the base and the second tank below the concave basin. A normally closed one-way depressible valve connects the basin and the second storage tank for allowing water to drain into the second tank by gravity and from preventing dirty water from being returned to the basin. The valve also includes a circular plug with an upwardly extending skirt and a coil spring within the skirt for biasing the valve into a closed position.