Dishwasher Rack Spray Assembly for Narrow-Opening Glassware
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Solution Overview
Problem
Household dishwashers face challenges in effectively spraying treating liquid into glassware with narrow openings, such as bottles and vases, due to the limitations of traditional sprayer systems.
Innovation Solution
A dishwasher design featuring a rack spray assembly with movable sprayers that can adjust their position to optimize liquid flow, allowing the liquid to reach tall items by changing the extension's position to direct the spray higher into the dish rack, ensuring better coverage and cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional fixed sprayer is used, then the device complexity is low, but the cleaning effectiveness for glassware with narrow openings is insufficient
Solution Approach 1:
The sprayer includes an extendable tube that can move between retracted and extended positions. When the tube extends, it reaches into narrow openings of glassware to deliver spray directly inside, solving the cleaning effectiveness problem while maintaining relatively simple structure through basic telescoping mechanics
2Area of stationary object
If the sprayer extends higher to reach tall items, then the cleaning coverage improves, but the device complexity increases due to movable components
Solution Approach 1:
The sprayer tube is designed to be extendable along the vertical axis, allowing it to reach taller glassware and expand the spray coverage area. The telescoping mechanism provides this dynamic adjustment capability with minimal structural complexity
Solution Approach 2:
The sprayer adds vertical dimensionality to the spray delivery system by extending upward to reach tall items, rather than only spraying horizontally. This dimensional extension improves coverage of tall glassware without requiring complex multi-axis mechanisms
3Manufacturing precision
If the sprayer is positioned to reach narrow openings, then the cleaning precision improves, but the ease of operation decreases due to adjustable positioning
Solution Approach 1:
The extendable tube is designed to be manually extended by the user through simple pulling motion, and the spring mechanism automatically returns it to the retracted position. This self-service design allows precise positioning for narrow openings without requiring complex controls or tools
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
The adjustable sprayer system effectively reaches and cleans items with narrow openings, improving the overall cleaning performance by ensuring adequate liquid distribution within the dishwasher.
Implementation Method 1
at least one sprayer provided on the rack and positioned to spray treating liquid onto dishes received by the rack
Data Source
AI summary
A dishwasher having a tub defining a treating chamber, a dish rack, and a spray assembly associated with the dish rack. The spray assembly may include at least one sprayer positioned to spray treating liquid onto dishes received by the rack. The sprayer has two openings and may be movable between a first position where the treating liquid flows through the first liquid opening into the treating chamber and does not flow through the second liquid opening and a second position where the treating liquid flows through the second liquid opening into the treating chamber. The sprayer may be rotatable between positions and may emit spray in both positions.