Washing Machine Current Sensing for Adaptive Laundry Cycle Control
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Solution Overview
Problem
Existing washing machines lack the ability to perform laundry cycles that are optimally tailored to the specific type and weight of laundry, leading to inefficiencies in detergent use, water consumption, and cycle duration.
Innovation Solution
A washing machine equipped with a current sensor and controller that detects the driving current and weight of laundry to determine optimal process conditions, adjusting parameters such as detergent amount, water level, and cycle time based on the detected values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed laundry cycle is applied to all types of laundry, then the device complexity is reduced and ease of operation is improved, but the productivity and efficiency of detergent use, water consumption, and cycle duration are worsened
Solution Approach 1:
The washing machine automatically detects laundry weight using a load sensor and laundry material using an image recognition camera, then self-determines the optimal laundry cycle parameters without user input. This enables the system to serve itself by autonomously adapting the washing process to the specific laundry characteristics, thereby improving productivity while maintaining ease of operation.
Solution Approach 2:
The system dynamically changes multiple process parameters including washing time, water level, detergent dosage, and drum rotation speed based on the detected laundry weight and material type. By adjusting these parameters according to actual laundry conditions rather than using a fixed cycle, the system optimizes productivity and resource efficiency while keeping the interface simple for users.
2Adaptability or versatility
If a fixed laundry cycle is applied to all types of laundry, then the device complexity is reduced, but the adaptability to different laundry types and the efficiency of resource use are worsened
Solution Approach 1:
The washing machine integrates multiple detection functions into a single control system: a load sensor detects weight, an image recognition camera identifies material type and color, and the controller synthesizes this data to determine the appropriate cycle. This multi-functional approach enables high adaptability to different laundry types while managing device complexity through integrated design.
Solution Approach 2:
The system replaces traditional mechanical or manual methods of determining laundry characteristics with electronic sensing and optical image recognition technology. This substitution enables precise detection of weight and material properties, enhancing adaptability while the digital processing and automated control manage the complexity of coordinating multiple sensors and actuators.
3Productivity
If detailed material detection and current detection processes are added to determine optimal process conditions, then the productivity and efficiency of detergent use, water consumption, and cycle duration are improved, but the device complexity and extent of automation are worsened
Solution Approach 1:
The system implements feedback loops where the load sensor continuously monitors weight, the image recognition camera analyzes laundry characteristics, and the controller adjusts process parameters based on this feedback. During washing, the system monitors motor current to detect changes in laundry characteristics and dynamically adjusts the cycle, enabling high productivity through automated adaptation without requiring complex manual intervention.
Solution Approach 2:
The washing machine autonomously performs material detection, weight measurement, cycle determination, and real-time parameter adjustment without user involvement. This self-service capability maximizes productivity by continuously optimizing the washing process based on detected conditions, while the automated nature of these functions manages the complexity through integrated control systems rather than requiring multiple separate automated subsystems.
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 system provides customized laundry cycles that optimize detergent use, water consumption, and cycle duration, enhancing efficiency and performance based on the type and weight of laundry.
Implementation Method 1
a current sensor configured to detect the driving current applied to the motor that rotates the drum
Data Source
AI summary
A washing machine including a drum, a driving circuit configured to apply a driving current to a motor which rotates the drum, a current sensor configured to detect the driving current, and a controller configured to perform a weight detection process and a material detection process based on a selection of a laundry course, perform a current detection process in which a value of the driving current is detected while the drum is being rotated based on a type of material of the laundry determined in the material detection process, and determine a process condition to be applied to the laundry course identified by the selection based on the value of the driving current detected in the current detection process and a value of weight of the laundry determined in the weight detection process.