Dishwasher Zonal Wash Control for Mixed Utensil Loads
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Solution Overview
Problem
Conventional dishwashers lack the ability to efficiently control wash cycles based on the specific load and type of utensils, often resulting in inappropriate wash cycles for certain items, leading to inefficiency and incomplete cleaning.
Innovation Solution
A method for controlling an automatic dishwasher that allows users to define multiple wash zones within the dishwasher, enabling the selection of different cleaning cycles for each zone, ensuring that each area receives the appropriate wash cycle based on the type and soil level of utensils, thereby optimizing cleaning performance and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single wash cycle is used for the entire dishwasher, then the device complexity is low and operation is simple, but the cleaning effectiveness is insufficient for different types of utensils
Solution Approach 1:
The dishwasher interior is divided into multiple wash zones (e.g., upper zone, lower zone, mid zone) that can be independently controlled. Each zone can receive different wash cycles, water temperatures, and spray patterns, allowing tailored cleaning for different utensil types while maintaining a single integrated device.
Solution Approach 2:
Different regions of the dishwasher are assigned different washing characteristics based on local needs. For example, the lower zone may receive hot water and aggressive spray for pots and pans, while the upper zone receives cooler water and gentler spray for delicate glassware, optimizing cleaning effectiveness for each local area.
2Reliability
If different wash cycles are applied to different zones, then cleaning effectiveness for specific utensil types improves, but water and energy consumption increase
Solution Approach 1:
The system applies wash cycles selectively to only those zones containing utensils that require intensive cleaning. Zones without utensils or with lightly soiled items can be excluded from aggressive washing, reducing overall water and energy consumption while maintaining effective cleaning where needed.
Solution Approach 2:
The dishwasher dynamically adjusts wash zone activation based on detected utensil types and soil levels. The control system can modify which zones receive water and energy-intensive cycles in real-time, optimizing resource usage according to actual loading conditions rather than running all zones at full capacity.
3Loss of energy
If the dishwasher targets only specific zones with utensils, then resource efficiency improves, but the device complexity increases due to zone detection and control mechanisms
Solution Approach 1:
The dishwasher employs sensors and detection systems that automatically identify utensil locations and types in each zone, enabling the system to self-determine which areas require washing. This automated detection reduces the need for complex manual control interfaces while improving resource efficiency through targeted zone activation.
Solution Approach 2:
The control system integrates multiple functions into a single unified controller that handles zone detection, cycle selection, water temperature regulation, and spray activation. This multi-functional approach consolidates complexity into a centralized system rather than requiring separate control mechanisms for each function.
Data Source
AI summary
A method for controlling the operation of an automatic dishwasher including receiving input for a zonal wash cycle from a user interface to a controller indicating a selection of a first cleaning cycle corresponding to a first wash zone and a second cleaning cycle, different from the first cleaning cycle, corresponding to a second wash zone, and implementing a zonal wash cycle by implementing each of the first and second cleaning cycles during a single cycle of operation of the dishwasher to define the zonal wash cycle.