Laundry washing machine
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing layout of salt and detergent drawers in high-end front-loading laundry washing machines can lead to accidental mixing of detergents and salt, contaminating the water softening system or causing metal parts to rust, due to their adjacent placement.
Innovation Solution
A design where the detergent and salt drawers are independently movable and have separate compartments with a water supply system that allows fresh water to be used for flushing and regeneration, preventing cross-contamination by using an upper lid assembly to channel water into the salt compartment and a trapdoor to manage the pouring of salt, ensuring proper separation and preventing accidental mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the salt drawer and detergent drawer are placed adjacent to each other for easy access and loading, then the ease of operation is improved, but the risk of accidental mixing increases causing contamination
Solution Approach 1:
The drawer assembly is segmented into two independently movable drawers (salt drawer and detergent drawer) that can be operated separately. This segmentation allows users to access and load each drawer independently, reducing the risk of accidental mixing while maintaining ease of operation. The independent movement capability ensures that users can open one drawer without necessarily opening the other, providing better control over the loading process.
Solution Approach 2:
A partition wall with a controlled opening and closure mechanism acts as an intermediary between the salt drawer and detergent drawer. This intermediate structure prevents direct contact between salt and detergent while still allowing the drawers to be accessed independently. The closure mechanism (such as a flap or door) serves as a mediator that can be opened only when needed for loading, providing a safety barrier against accidental mixing.
2Reliability
If the drawers are made independently movable for better separation and control, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The drawer system is divided into two independently movable units with separate guidance and actuation mechanisms. Each drawer has its own movement path controlled by dedicated guide rails or slots, allowing reliable separation without requiring complex coordinated control systems. This segmentation approach achieves high reliability through physical independence rather than complex interlocking mechanisms.
Solution Approach 2:
Instead of using a single complex mechanism to control both drawers simultaneously, the design inverts the approach by allowing each drawer to move independently with simple individual constraints. The complexity is reduced by inverting from a centralized control system to distributed independent movement, where each drawer manages its own positioning and separation.
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 effectively prevents contamination of the water softening system and protects metal parts by ensuring that detergents and salt are not accidentally mixed, enhancing the washing machine's performance and longevity.
Implementation Method 1
the water softening device is generally internally provided with a given amount of ion-exchange resins which are capable of restraining the calcium and magnesium ions (Ca++ and Mg++) dissolved in the water flowing through the same water softening device
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
Figure 1~2
Figure 3
Figure 4
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 (7) for supplying detergent into the washing tub (3), a fresh-water supply circuit (9) for selectively channelling a flow of fresh water from the water mains towards the detergent dispenser (7) and/or the washing tub (3), and an internal water softening device (11) capable of reducing the hardness degree of the fresh water that the fresh-water supply circuit (9) channels towards the detergent dispenser (7) or the washing tub (3); the laundry washing machine (1) further comprising at least one drawer (16, 60) which is fitted/inserted in extractable manner into a corresponding substantially basin-shaped, drawer housing (18), which is located/recessed inside the outer casing (2), and is movable in a substantially horizontally-oriented, displacement direction (d) between a retracted position in which the drawer (16, 60) is almost completely recessed into the outer casing (2), and an extracted position in which the drawer (16, 60) partly juts out from the outer casing (2); said drawer (16, 60) in turn comprising: a drawer-like supporting structure (21, 61) having a substantially basin- shaped, regeneration-agent compartment (20) structured for being manually tillable with a given amount of regeneration agent, and a manually openable, lid assembly (23), which is fitted on the drawer-like supporting structure (21, 61), on top of the regeneration-agent compartment (20), and is structured to selectively close/cover the upper mouth of the regeneration-agent compartment (20).