Dish washer
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Solution Overview
Problem
Existing dishwashers face challenges in efficiently distributing water to multiple spray units, leading to inefficiencies in washing performance.
Innovation Solution
A dishwasher design featuring an alternating device with a cylindrical protrusion and recessed portion, allowing for multiple ducts to be connected in various directions, and a sealing member to ensure secure coupling, facilitating water distribution to multiple spray units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single duct structure is used to distribute water to multiple spray units, then the device complexity is reduced, but the adaptability to connect ducts in multiple directions is limited
Solution Approach 1:
The alternating device is segmented into multiple connection interfaces: a recessed portion for receiving one duct and a cylindrical protrusion for connecting another duct. This segmentation allows the single alternating device to adaptively connect ducts coming from different directions without requiring a completely different structure for each configuration.
Solution Approach 2:
The alternating device serves multiple functions simultaneously: it acts as a water distribution node, a connection hub for multiple ducts, and a flow control point. The universal design with both recessed portion and cylindrical protrusion allows it to handle various duct connection scenarios, making it adaptable to different installation configurations while maintaining a single standardized component design.
2Ease of manufacture
If multiple connection interfaces are provided on the alternating device, then the ease of assembly is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The connection interfaces are designed with asymmetric features: the recessed portion and cylindrical protrusion have complementary but non-identical geometries. This asymmetry provides built-in alignment guidance during assembly, reducing the need for high manufacturing precision while ensuring proper orientation and connection. The asymmetric design naturally guides the ducts into the correct positions during installation.
Solution Approach 2:
The alternating device acts as an intermediary component between multiple ducts and the water distribution system. By providing standardized intermediate connection interfaces (recessed portion and cylindrical protrusion), it mediates the connection process, allowing ducts to be assembled without requiring extremely tight tolerances on the ducts themselves, thus reducing overall manufacturing precision requirements while maintaining ease of assembly.
Data Source
AI summary
A dishwasher includes a tub, a sump, an alternating device to guide water outside the sump. The alternating device has a cylindrical protrusion extending in an up-and-down direction, a recessed portion on its upper surface, and a plurality of outlets. A spray device sprays water from the alternating device into the tub and includes a first spray unit and a second spray unit having an inflow portion connected to the cylindrical protrusion. A duct guides water from the alternating device to the first spray unit and is coupled to the recessed portion. Water flowing from the alternating device to the first spray unit flows through the plurality of outlets to the duct, and water flowing from the alternating device to the second spray unit flows through the cylindrical protrusion and the inflow portion.