Dishwasher with rack
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Solution Overview
Problem
Conventional dishwashers lack an efficient mechanism to accommodate varying dish sizes and types, particularly in the upper and third-level racks, which can lead to inadequate cleaning and space utilization during different wash cycles.
Innovation Solution
The dishwasher incorporates a second dish rack with a movable section that adjusts between deployed and stowed positions, allowing for different heights and wash zones, and a movable spray tube that changes positions to optimize cleaning for various dish sizes and types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the upper rack and third-level rack have fixed structures, then the manufacturing cost is reduced and the structure is simplified, but the adaptability to different dish sizes and types deteriorates
Solution Approach 1:
The patent applies the dynamics principle by making the third-level rack movable between a deployed position (providing additional washing space for small items) and a stowed position (clearing the path for tall items in the upper rack). This dynamic configuration allows the rack system to adapt to different dish sizes and types without requiring multiple fixed rack structures, thereby improving versatility while controlling structural complexity.
Solution Approach 2:
The patent segments the washing chamber into multiple zones by allowing the third-level rack to be independently positioned. The movable third-level rack creates distinct wash zones that can be configured based on the loading requirements, enabling simultaneous washing of different dish types at different heights without interfering with each other.
2Quantity of substance
If the third-level rack is always in the deployed position, then the washing capacity for small items is improved, but the space availability for tall items in the upper rack deteriorates
Solution Approach 1:
The movable third-level rack enables dynamic adjustment of washing capacity. When small items need to be washed, the rack is deployed to provide additional washing surfaces. When tall items are loaded in the upper rack, the third-level rack is stowed to clear the vertical space. This dynamic reconfiguration resolves the conflict between maximizing small item capacity and maintaining space for tall items.
3Reliability
If the spray tube is fixed in position, then the device complexity is reduced, but the cleaning effectiveness for dishes of different heights deteriorates
Solution Approach 1:
The spray tube is made movable between a first position (spraying toward the rear of the treating chamber) and a second position (spraying toward the front). This dynamic positioning allows the spray system to effectively clean dishes of different heights and types by adjusting the spray direction to match the rack configuration, thereby improving cleaning reliability without requiring multiple fixed spray systems.
Data Source
AI summary
A dishwasher for treating dishes according to a cycle of operation, the dishwasher having a tub at least partially defining a treating chamber and a first dish rack received within the treating chamber, and having a least a portion with a seat for supporting dishes. A second dish rack is located above the first dish rack and includes a movable section.