Dishwasher Image-Based Object Sensing for Targeted Spray Control
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Solution Overview
Problem
Traditional dishwasher spray arm systems are inefficient as they waste resources by evenly distributing wash fluid across all areas, leading to inadequate cleaning in corners and increased noise, and fail to focus fluid where needed, resulting in suboptimal performance.
Innovation Solution
The implementation of an image-based object sensing system in dishwashers that uses cameras to capture images of the wash tub contents, allowing a controller to adjust the position and pattern of controllable sprayers to target specific areas and zones for focused washing, optimizing fluid distribution and wash cycle configurations based on object detection and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spray arms distribute wash fluid evenly across all areas, then all areas receive fluid coverage, but resources are wasted and cleaning performance in corners is insufficient
Solution Approach 1:
The system transitions from uniform spray distribution to localized targeted spraying by using image sensors to detect object positions and controlling spray arms to direct fluid precisely at detected objects and areas requiring cleaning, thereby improving cleaning effectiveness while reducing overall fluid consumption
Solution Approach 2:
The spray arm system incorporates dynamic control capabilities where the rotation speed, spray direction, and active spray zones are adjusted in real-time based on image analysis data, allowing the system to adapt spray patterns to match the actual load configuration and focus resources where needed
2Reliability
If spray arms follow a circular path, then simple rotation is achieved, but corners of the tub are not covered thoroughly
Solution Approach 1:
The spray arms transition from fixed circular rotation to dynamic multi-pattern motion paths that include radial movements, oscillating patterns, and adjustable rotation speeds, enabling comprehensive coverage of corner areas while maintaining controllable complexity through centralized control systems
Solution Approach 2:
The tub space is divided into multiple zones with different spray requirements, and the spray arm system is controlled to apply different motion patterns and spray intensities to different zones, particularly enhancing coverage in corner regions through segmented control strategies
3Loss of energy
If spray jets are directed to the sides of the wash tub, then fluid distribution is simplified, but unneeded noise is generated
Solution Approach 1:
The system directs spray fluid locally at detected objects and soiled areas rather than broadcasting spray to all surfaces including tub sides, reducing noise-generating spray impact on hard surfaces while maintaining effective cleaning coverage through precise localization
Data Source
AI summary
Image-based object sensing is utilized in a dishwasher to configure a wash cycle and/or perform other operations in the dishwasher.