Washer Brine Drawer Layout for Precise Water Softener Regeneration
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Solution Overview
Problem
High-end front-loading laundry washing machines face challenges with costly hydraulic fittings for connecting the pump assembly to the regeneration-agent drawer, leading to imprecise brine dosage and potential blockages due to salt grains falling into the pump suction.
Innovation Solution
A design featuring a brine container located underneath the drawer housing, allowing brine to flow by gravity into a separate tank, with an electrically-powered pump assembly to selectively pump the brine to the water softening device, enhancing connection simplicity and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hydraulic fittings are used to connect the pump assembly directly to the regeneration-agent drawer, then the connection is established, but the production costs significantly increase
Solution Approach 1:
The system is divided into separate functional components: the regeneration-agent drawer, the brine container, and the pump assembly. This segmentation allows each component to be manufactured independently using simpler, less expensive methods while maintaining overall system functionality.
Solution Approach 2:
A brine container is introduced as an intermediary element between the regeneration-agent drawer and the pump assembly. This intermediary allows gravity-fed brine collection and storage, eliminating the need for complex hydraulic fittings and direct pressurized connections.
2Measurement precision
If the pump assembly sucks brine directly from the regeneration-agent drawer, then brine is delivered to the water softening device, but the brine dosage is imprecise
Solution Approach 1:
Brine is pre-formed and collected in the brine container before being pumped to the water softening device. This preliminary action allows for controlled accumulation and precise metering of brine dosage, improving measurement precision while maintaining regeneration efficiency.
3Reliability
If the pump assembly suction is directly connected to the regeneration-agent drawer, then brine can be pumped, but salt grains block the suction
Solution Approach 1:
The brine container serves as an intermediary reservoir that receives brine from the regeneration-agent drawer through gravity flow. This intermediary structure allows salt grains to settle and be filtered out before the brine is pumped, preventing blockages and improving pump operation reliability without requiring complex filtration systems.
Solution Approach 2:
The problematic elements (salt grains) are effectively removed from the pump suction line by using the brine container as a settling chamber. The brine is extracted and collected separately from the regeneration-agent drawer, allowing impurities to be left behind in the drawer while clean brine is pumped.
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
Simplifies the connection of the pump assembly, reduces production costs, and allows for precise control of brine dosage, preventing blockages and improving the regeneration process of ion-exchange resins.
Implementation Method 1
allowing the brine to freely flow by gravity from said basin-shaped bottom portion into the same brine container
Implementation Method 2
an electrically-powered pump assembly able to selectively pump the brine from said brine container to the water softening device
Implementation Method 3
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
Implementation Method 4
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
Figure 1~2
Figure 3
Figure 4~5
AI summary
Laundry washing machine (1) comprising an outer casing (2), a washing tub (3), a rotatable drum housed in axially rotatable manner inside the washing tub (3), a detergent dispenser (10), a fresh-water supply circuit (12) for selectively channelling a flow of fresh water towards the detergent dispenser (10) and/or the washing tub (3), and an internal water softening device (14) capable of reducing the hardness degree of the fresh water; the laundry washing machine (1) further comprising: at least a main drawer (16, 74) which is fitted/ inserted in extractable manner into a corresponding substantially basin-shaped, drawer housing (18, 73) which is located/recessed inside the outer casing (2), and is provided with a substantially basin- shaped, manually tillable regeneration-agent compartment (20); a first water-supply line (19) which is structured for selectively channelling a flow of fresh water into said regeneration-agent compartment (20) so as to form some brine; a brine container (34) which is located underneath the drawer housing (18, 73) and communicates with the bottom of the drawer housing (18, 73) so as to allow the brine to freely flow by gravity from a basin-shaped bottom portion (32) of said drawer housing (18, 73) into the same brine container (34); and an electrically-powered pump (35) able to selectively pump the brine from said brine container (34) to the water softening device (14).