Domestic dishwasher
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Solution Overview
Problem
Household dishwashers require manual cleaning of the filter system, which reduces operating convenience due to clogging from food remnants over time.
Innovation Solution
A dishwasher design featuring a spray arm with an extension piece and satellite that includes a filter cleaning nozzle, allowing for automated cleaning of the filter system using washing liquor or fresh water, eliminating the need for manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual cleaning of the filter system is required, then the structure remains simple, but the operating convenience deteriorates due to frequent manual intervention needed
Solution Approach 1:
The filter cleaning nozzle is integrated into the spray arm assembly, combining the filter cleaning function with the existing washing spray mechanism. This merging allows automated filter cleaning without requiring a separate complex cleaning system, thus improving operating convenience while limiting structure complexity increase
Solution Approach 2:
The filter system cleans itself through the filter cleaning nozzle that directs washing liquor or fresh water onto the filter during the washing cycle. This self-service mechanism eliminates the need for manual cleaning intervention, significantly improving ease of operation
2Reliability
If the spray arm structure is extended to include filter cleaning capability, then the filter cleaning effectiveness improves, but the device complexity increases
Solution Approach 1:
The spray arm is designed to perform multiple functions: both washing the dishwasher load and cleaning the filter system. The filter cleaning nozzle is integrated into the existing spray arm structure, allowing a single component to serve dual purposes. This multi-functionality improves filter cleaning effectiveness while avoiding the complexity of adding a completely separate cleaning mechanism
Solution Approach 2:
The filter cleaning nozzle is positioned on the extension piece of the spray arm, utilizing the radial extension from the spray arm axis. This spatial arrangement allows the cleaning function to be added in a different dimensional direction rather than increasing the complexity of the main spray arm structure
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 automated filter cleaning process enhances convenience and effectiveness, ensuring reliable and efficient removal of food remnants from the filter system, improving overall dishwasher performance.
Implementation Method 1
a filter cleaning nozzle for cleaning the filter system with the aid of the washing liquor and/or fresh water
Implementation Method 2
cleaning the filter system with the aid of the washing liquor and/or fresh water
Data Source
AI summary
A household dishwasher includes a washing container for holding a dishwasher load, a sump arranged at a bottom of the washing container, a filter system provided at the sump, and a spray arm for applying washing liquor and/or fresh water to the dishwasher load. The spray arm includes an extension piece which is mounted on the sump for rotation about a first axis of rotation and includes a filter cleaning nozzle for cleaning the filter system with the aid of the washing liquor and/or fresh water, and a spray arm satellite which is mounted on the extension piece for rotation about a second axis of rotation.