Washing Machine Brine Reservoir Layout to Prevent Pump Salt Deposits
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Solution Overview
Problem
The accumulation of brine on the bottom of the regeneration-agent drawer in laundry washing machines can lead to salt deposits, which can block the suction of the pump assembly and impair the operation of the water softening system.
Innovation Solution
A laundry washing machine design that includes a separate brine reservoir connected to the regeneration-agent reservoir, allowing fresh water to be channeled into the brine reservoir to rinse and accumulate brine, which is then pumped to the water softening device, thereby preventing brine accumulation on the pump assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brine is accumulated in the regeneration-agent drawer for pumping to the water softening device, then the water softening system can be regenerated, but salt deposits form on the pump assembly blocking suction
Solution Approach 1:
The invention divides the brine handling system into two separate components: a regeneration-agent drawer for storing salt and a separate brine reservoir for accumulating brine. This segmentation prevents brine from accumulating in the drawer where it would form deposits, while providing a dedicated reservoir that can be properly positioned and designed to prevent pump suction blocking.
Solution Approach 2:
The brine reservoir acts as an intermediary component between the regeneration-agent drawer and the water softening device. It receives brine from the drawer, allows it to settle, and provides a clean interface for the pump to draw brine from, preventing direct contact between pump suction and brine accumulation zones where deposits would form.
2Device complexity
If brine is pumped directly from the regeneration-agent drawer to the water softening device, then the regeneration process is simple, but brine accumulation impairs pump operation
Solution Approach 1:
The system is segmented into three functional parts: the regeneration-agent drawer for salt storage, the brine reservoir for brine accumulation and settling, and the pump assembly for brine transfer. This segmentation adds minimal complexity while significantly improving reliability by preventing brine from directly contacting the pump suction.
Solution Approach 2:
The brine reservoir serves as an intermediary that simplifies the overall system by providing a dedicated space for brine accumulation, eliminating the need for complex pump positioning or additional flushing mechanisms to prevent deposits.
3Reliability
If ion-exchange resins retain calcium and magnesium ions to reduce water hardness, then cleaning performance improves, but the resins require periodic regeneration with brine
Solution Approach 1:
The brine reservoir is pre-filled with brine solution before the regeneration cycle begins. This preliminary preparation allows the pump to immediately transfer brine to the water softening device without delay, enabling quick regeneration of the ion-exchange resins and minimizing the time the system is non-operational.
Solution Approach 2:
The system uses the retained calcium and magnesium ions themselves as part of the regeneration process. The brine flushes these ions out of the resins, and the spent brine containing the removed ions is directed to drainage, allowing the resins to be automatically regenerated without manual 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
This design prevents salt deposits from forming on the pump assembly, ensuring continuous operation of the water softening system and reducing water consumption by allowing for precise control of the brine amount used for regeneration.
Implementation Method 1
the water softening device is generally internally provided with a given amount of ion-exchange resins which are capable of retaining the calcium and magnesium ions (Ca++ and Mg++) dissolved in the water flowing through the same water softening device, so as to reduce the hardness degree of the tap water
Implementation Method 2
Salt water, in fact, is able to remove from the ion-exchange resins the calcium and magnesium ions previously combined/fixed to said resins
Data Source
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AI summary
A laundry washing machine (1) comprising an outer casing (2) and, inside said outer casing (2), a washing tub (3), a rotatable drum housed in axially rotatable manner inside the washing tub (3), a detergent dispenser (10) for supplying detergent into the washing tub (3), a fresh-water supply circuit (12) which for selectively channelling a flow of fresh water from the water mains towards the detergent dispenser (10) and/or the washing tub (3), and an internal water softening device (13) filled with a water softening agent; the laundry washing machine (1) further comprises: at least a first drawer (16, 70) inserted in extractable manner into a drawer housing (18, 71) located inside the outer casing (2), provided with a regeneration-agent compartment (21) tillable with a given amount of consumable salt or other regeneration agent; a first water-supply line (19) for selectively channelling a flow of fresh water into said regeneration-agent compartment (21); a brine reservoir (35) located underneath said first drawer (16, 70) and dimensioned to catch and contain the brine falling down from said regeneration-agent compartment (21); and a second water-supply line (19) for selectively channelling a flow of fresh water into said brine reservoir (35) bypassing the regeneration-agent compartment (21) of said first drawer (16, 70).