Water Softener Valve Layout for Brine Regeneration Flow
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Solution Overview
Problem
Conventional water-softening devices for household washing machines face issues with excess pressures and blockages due to the direct flow through the salt tank, lack of precise water dosing for regeneration, and the noise and robustness limitations of switching and mixing valves.
Innovation Solution
Incorporating a solenoid switching valve with a supplementary passage that maintains communication between the water supply line and the first branch, allowing continuous flow to the water-softening tank and enabling simultaneous supply of mains water and brine for regeneration, which dilutes the brine and reduces aggression on the water-softening substances, while using a more robust and less noisy valve type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all water flow is directed through the salt tank during regeneration, then the salt-containing tank can be simplified without requiring a separate collection container, but harmful excess pressures and blockages occur due to jamming of salt grains in narrow slits
Solution Approach 1:
The water flow path is segmented into two independent routes: a first branch leading directly to the water-softening tank and a second branch leading to the salt-containing tank. The switching valve directs water flow between these branches, allowing partial bypass of the salt tank while maintaining simplified tank structure without collection containers.
Solution Approach 2:
The switching valve acts as an intermediary component that controls water distribution between the first and second branches. It mediates between the water supply line and the two tanks, enabling selective flow paths that prevent blockages while maintaining system simplicity.
2Reliability
If a switching and mixing valve is used to maintain continuous flow to the water-softening tank, then blockages are prevented, but the valve becomes more noisy and less robust
Solution Approach 1:
The flow path is segmented into two separate branches with a switching valve that can direct water to either branch. This segmentation allows the use of a robust switching valve design rather than a complex switching and mixing valve, reducing noise while maintaining continuous flow capability through the first branch.
Solution Approach 2:
During regeneration, water flow is partially directed to the salt tank for brine production while the first branch maintains continuous flow to the water-softening tank. This partial action approach ensures continuous softening operation while enabling regeneration, without requiring the more complex and noisy switching and mixing valve.
3Productivity
If the shutter closes the inlet of the first branch during regeneration, then water is directed to the salt tank, but the flow to the water-softening tank is shut off creating harmful pressures
Solution Approach 1:
The water distribution system is segmented into two independent branches: the first branch continuously supplies water to the water-softening tank, and the second branch supplies water to the salt tank during regeneration. This segmentation ensures that closing the shutter for regeneration does not shut off flow to the water-softening tank, preventing harmful pressure buildup.
Solution Approach 2:
During regeneration, the shutter partially directs water flow to the second branch for salt tank operation, while the first branch maintains sufficient flow to the water-softening tank. This partial action ensures both regeneration productivity and continuous protection against excess pressures.
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
This solution prevents harmful pressures and blockages, ensures precise water dosing, and provides a robust and quiet operation by maintaining continuous flow to the water-softening tank and using a more precise and reliable valve configuration.
Implementation Method 1
a solenoid switching valve with a shutter adapted to cause the water to flow into the first or second branch by closing the aperture of the valve seat which forms the inlet of the said first branch
Implementation Method 2
the brine formed in the second tank is subsequently made to pass through the water-softening substances, typically ion-exchange resins, contained in the first tank
Data Source
Figure 1
Figure 2
AI summary
The water-softening device for electrical household appliances 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 at least one water inlet opening (32) and an outlet opening (34) for a regenerating brine formed following the dissolution of the salt in the water; 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); a water supply line (10) having a 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); and a switching valve (38) with a shutter adapted to cause the water to flow into the first or second branch (20, 22). The valve (38) further comprises a passage (42) which puts into communication the water supply line (10) and the first branch (20) independently of the position of the shutter.