Dishwasher Rack Projection for Reliable Retracted Positioning
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Solution Overview
Problem
Dishwasher appliances face challenges in positioning the rack assembly in the retracted position due to oversized articles and the presence of silverware baskets, which can cause the rack to be misaligned or pushed out of position during operation, preventing proper door closure and spray assembly functionality.
Innovation Solution
A dishwasher appliance design featuring a projection on the rack assembly that extends towards the door, ensuring the rack is properly positioned in the retracted position when the door is closed, even with a silverware basket installed, by engaging the door and maintaining alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rack assembly is positioned in the retracted position for proper door closure and spray assembly function, then door closure and spray function are improved, but oversized articles and silverware baskets can cause the rack to be pushed out of position during operation
Solution Approach 1:
A projection is added to the rack assembly that acts as an intermediary element to engage with the door. This projection serves as a mechanical link between the door and rack assembly, preventing the rack from being pushed forward during operation while allowing the door to close properly.
Solution Approach 2:
The projection on the rack assembly provides preliminary resistance against forward movement before the door fully closes or during operation. This preliminary anti-action prevents the rack from being pushed out of position by water pressure or other forces during the washing cycle.
2Reliability
If the rack assembly is positioned in the retracted position for spray assembly to receive wash fluid, then spray function is improved, but the rack may not remain properly positioned during operation
Solution Approach 1:
The projection engages with the door to serve as a mechanical intermediary that maintains the rack assembly in the correct retracted position. This ensures the spray assembly can receive wash fluid properly while preventing the rack from being pushed forward during operation.
3Shape
If the door is pressed closed to force the rack assembly into the retracted position, then rack positioning is improved, but the rack may still not be properly positioned if the silverware basket is removed
Solution Approach 1:
The projection on the rack assembly provides a self-positioning mechanism that works regardless of whether the silverware basket is installed or removed. The projection automatically engages with the door to maintain proper rack positioning without requiring user intervention or the presence of the silverware basket.
Data Source
AI summary
A dishwasher appliance with a tub that defines a wash chamber is provided. A rack assembly is received within the wash chamber and includes a projection that extends from a front of the rack assembly. The projection is configured to engage a door of the dishwasher appliance and position the rack assembly in a retracted position when the door is in a closed position.