Laundry Drum Multi-Speed Rotation for Accurate Load Detection
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Solution Overview
Problem
Current laundry treating apparatuses face inaccuracies in detecting laundry amount due to variations caused by clothes positioning, leading to inconsistent water supply and operation settings.
Innovation Solution
The apparatus employs a method involving multiple speed rotations and current sensing sections to accurately determine laundry amount by accounting for the influence of eccentricity, using a motor control unit, current sensing unit, and laundry amount sensing unit to correct for variations in clothes distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If laundry amount detection uses motor load variation principle, then the detection method is simple, but the detected laundry amount shows variation due to clothes state changes
Solution Approach 1:
The system performs preliminary actions by rotating the drum at a first speed before detection, and positioning clothes to one side before measurement. This preliminary positioning ensures that clothes are in a consistent state during detection, reducing variation in the measured laundry amount while maintaining the simplicity of the motor load-based detection method.
2Ease of operation
If clothes are positioned to one side during measurement, then the detection process is simplified, but dispersion of clothes causes inaccurate laundry amount determination
Solution Approach 1:
The system uses periodic action by rotating the drum at a first speed for a predetermined time before detection. This periodic rotation redistributes clothes uniformly before the actual measurement, ensuring accurate laundry amount determination while keeping the detection process simple and systematic.
3Productivity
If single speed rotation is used for detection, then the operation is simple, but clothes distribution variations cause measurement inconsistencies
Solution Approach 1:
The system applies dynamics by using multiple rotation speeds - first rotating at a first speed for a predetermined time to redistribute clothes, then rotating at a second speed during detection. This dynamic approach ensures clothes are uniformly distributed during measurement, improving measurement consistency while maintaining operational efficiency through automated speed control.
Solution Approach 2:
The system performs preliminary rotation at a first speed before the actual detection phase at second speed. This preliminary action ensures clothes are properly distributed before measurement begins, eliminating the need for complex real-time adjustments and maintaining detection operation efficiency.
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
This approach enables precise laundry amount determination, ensuring accurate operation settings even when clothes are not uniformly distributed, thereby improving the reliability of laundry treatment processes.
Implementation Method 1
a braking for applying a brake to stop the drum
Implementation Method 2
a first current sensing for sensing a current applied to the motor at a first current sensing section
Data Source
AI summary
A method may be provided for controlling a laundry treating apparatus. A first speed rotating may control the drum to accelerate the drum to rotate at a first speed, a braking may apply a brake to stop the drum, a second speed accelerating may accelerate the drum to a second speed, a current sensing may sense a current being applied to the motor during the drum is accelerated to the second speed, and a laundry amount determining may determine a laundry amount based on the current sensed in the current sensing.