Dishwasher Water Softener Valve Layout for Brine Regeneration Flow
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Solution Overview
Problem
Existing water supply and treatment devices for dishwashing machines can experience overpressure issues due to blockages in the salt-containing tank's inlet and outlet openings, potentially preventing water flow and requiring additional storage vessels.
Innovation Solution
A three-way valve is positioned at the branch-off point of the supply line, allowing for two operating configurations: one where water flows directly into the water-softening tank and another where it flows partly into the tank and partly into the salt-containing tank, preventing overpressure and allowing continuous water flow even with obstructions, and enabling simultaneous supply of mains water and brine for regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all water flows through the salt tank during regeneration, then the salt tank can be used for water storage, but blockages in the salt tank openings cause overpressure and prevent water flow
Solution Approach 1:
The water flow path is segmented into two independent routes: one through the salt tank and another bypassing it. The valve divides the single water supply into multiple paths, allowing water to be distributed differently based on operational needs. This segmentation ensures that blockages in one path do not completely prevent water flow through the system.
Solution Approach 2:
The valve acts as an intermediary device that controls and directs water flow between different paths. It mediates between the water supply and the two possible destinations (salt tank or first tank), enabling flexible routing. This intermediary control mechanism prevents the harmful effect of complete flow blockage while maintaining the simplified structure.
2Reliability
If a storage vessel is added to prevent overpressure, then water flow reliability improves, but device complexity and volume increase
Solution Approach 1:
The valve serves multiple functions: it directs water to the salt tank during regeneration, bypasses the salt tank during normal operation, and controls the distribution of brine to the first tank. This multi-functionality eliminates the need for separate storage vessels or pressure relief devices, maintaining simplicity while ensuring reliable water flow under various conditions.
Solution Approach 2:
The system uses the existing salt tank structure and water supply infrastructure to provide both storage and flow control functions. The valve leverages the natural flow paths and existing components to achieve pressure regulation and flow management without requiring additional dedicated safety components.
3Productivity
If brine is supplied directly to the first tank without dilution, then regeneration efficiency is high, but water-softening substances are damaged due to aggressive action
Solution Approach 1:
The system merges two water sources (mains water and brine) into a single diluted brine stream that is supplied to the first tank. The valve combines the fresh water flow with the brine flow, creating a mixed solution that maintains regeneration effectiveness while reducing the harmful concentrated salt effect on the ion-exchange resins.
Solution Approach 2:
The concentration parameter of the brine is changed by diluting it with fresh water before it contacts the water-softening substances. This parameter modification reduces the aggressiveness of the brine while preserving its ability to regenerate the resins, thereby protecting the substances from damage during the regeneration 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 eliminates the need for a storage vessel, prevents overpressure, and dilutes brine for less aggressive action on water-softening substances, ensuring continuous operation and reduced risk of damage.
Implementation Method 1
allows the flow along the first branch towards the first tank
Implementation Method 2
a line connecting the second tank to the first tank so that the brine formed in the second tank can flow out towards the first tank
Implementation Method 3
The brine is thus diluted with the advantage that it has a less aggressive action on the water-softening substances
Implementation Method 4
the brine formed in the second tank is subsequently made to pass through the water-softening substances, which are typically ion-exchange resins contained in the first tank
Data Source
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AI summary
The device comprises: a first tank (24) for containing substances with water-softening properties, having at least one inlet opening (26) for water to be softened and an outlet opening (28) for softened water; a second salt-containing tank (30), having a water inlet opening (32) and an outlet opening (34) for a regenerating brine; a line (36) connecting the second tank (30) to the first tank (24) so that the brine formed in the second tank (30) can flow out towards the first tank (24); and a water supply line (10) having a first branch-off point (18) into a first branch (20) supplying the first tank (24) and into a second branch (22) which leads to the inlet opening (32) of the second tank (30). A valve (38) is situated at the branch-off point (18) or a converging point (40) of the first branch (20) and the connection line (36). The valve (38) is able to assume a first operating configuration where it prevents the outflow from the supply line (18) towards the first tank (24) via the second tank (30), while it allows the flow along the first branch (20) towards the first tank (24), so that all the water supplied to the branch-off point (18) is diverted directly into the first tank (24), and a second operating configuration where it allows both the outflow from the supply line (10) towards the first tank (24) via the second tank (30) and the flow along the first branch (20) towards the first tank (24), so that the water supplied is diverted into the first tank (24) partly directly and partly via the second tank (30).