Dishwasher with rack corner spray system
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Solution Overview
Problem
Existing dishwasher systems lack effective spray flow and coverage, particularly in corner regions of the rack, which can lead to inadequate cleaning of dishes, especially containers with complex geometries like glasses.
Innovation Solution
A dishwasher system featuring a multi-tube feed arrangement with a rack-supported manifold and corner nozzles, including an interior and exterior corner nozzle, along with a diverter valve mechanism to selectively distribute washing fluid to distinct spray arms, ensuring thorough cleaning of both interior and exterior surfaces during specific cycle phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple spray arms are provided within a single wash tub, then spray coverage is improved, but device complexity increases due to additional fluid distribution systems and valving mechanisms
Solution Approach 1:
The spray system is segmented into multiple independent spray arms (lower rotatable spray arm, upper rotatable spray arm, intermediate rotatable spray arm) that can be selectively activated. Each spray arm is equipped with its own nozzle arrangement and can be controlled independently through the valving mechanism, allowing the system to provide comprehensive spray coverage while managing complexity through modular segmentation.
Solution Approach 2:
The fluid distribution system is designed with a universal manifold and valving mechanism that can direct washing fluid to any combination of spray arms. The system provides multi-functionality by enabling selective activation of different spray arms based on washing cycle requirements, rack positions, and soiling patterns, thereby achieving comprehensive coverage without requiring separate dedicated systems for each spray arm.
2Adaptability or versatility
If the upper rack is made vertically adjustable, then adaptability is improved, but device complexity increases due to additional provisions for fluid connection at various vertical orientations
Solution Approach 1:
The fluid connection system is designed with dynamic capabilities to accommodate the vertically adjustable upper rack. The manifold and fluid distribution mechanism can adapt to different vertical rack positions through flexible piping, telescopic connections, or gravity-assisted flow distribution, enabling the system to maintain functional fluid delivery without requiring fixed rigid connections for each possible rack position.
Solution Approach 2:
The system accommodates rack position changes by allowing parameters such as fluid flow direction, pressure distribution, and connection geometry to change dynamically with rack position. The valving mechanism and fluid distribution system can adjust their operational parameters to maintain effective spray coverage regardless of the upper rack's vertical orientation.
3Loss of time
If flow control system with separate conduits and valving is provided, then flow timing control is improved, but device complexity increases
Solution Approach 1:
The flow control system implements periodic action by sequentially activating different spray arms according to predetermined timing sequences. The valving mechanism opens and closes in a periodic cycle to direct washing fluid to the lower spray arm, then the upper spray arm, then the intermediate spray arm, or in various combinations, thereby achieving precise flow timing control through rhythmic, periodic valve operation rather than continuous complex multi-conduit systems.
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 configuration enhances cleaning efficiency by directing washing fluid precisely to corner regions, ensuring that both interior and exterior surfaces of dishes, such as glasses, are adequately sprayed and cleaned, improving overall cleaning performance.
Implementation Method 1
a corner of the rack is provided with both an interior corner nozzle and an exterior corner nozzle
Data Source
AI summary
A dishwasher includes a rack provided with interior and exterior corner nozzles to direct washing fluid onto interior and exterior surface portions of an object placed in a corner of the rack.