Adaptive Drum Motion Control for Laundry Type and Vibration
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Solution Overview
Problem
Conventional laundry machines lack the ability to optimize drum driving motions for varying types of laundry, leading to inefficient washing, increased energy consumption, and potential damage to fabrics due to inconsistent mechanical forces and vibrations.
Innovation Solution
A laundry machine with a control method that diversifies drum driving motions, including combinations of rotation directions and speeds, to apply optimal mechanical forces based on laundry type and soil level, using lifters to lift and drop laundry, and a suspension unit to absorb vibrations, allowing for specific movement patterns like massaging, disentangling, striking, swinging, rubbing, and squeezing/filtrating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional laundry machines use fixed drum driving motions, then the structure is simple and easy to operate, but washing efficiency is low and energy consumption is high
Solution Approach 1:
The patent implements dynamic drum driving motions by varying rotation directions (clockwise/counter-clockwise) and speeds (high/low) based on detected laundry types. The control unit adjusts motor parameters in real-time to optimize washing performance for different fabric categories, transforming the fixed drum motion into an adaptive dynamic system that improves washing efficiency while managing complexity through automated control.
Solution Approach 2:
The system changes operational parameters (rotation direction and speed) according to laundry type detection results. By modifying these parameters dynamically, the system achieves optimized washing performance for delicate, normal, or heavy-duty fabrics without requiring multiple physical drum configurations, thus improving productivity while controlling device complexity through software-based parameter adjustment.
2Loss of time
If conventional laundry machines use fixed drum driving motions, then the device is simple to manufacture, but washing time is prolonged and fabric damage occurs
Solution Approach 1:
The system incorporates a sensor-based feedback mechanism that detects laundry type and provides input to the control unit. Based on this feedback, the control unit automatically selects appropriate drum driving patterns (rotation directions and speeds), enabling the system to reduce washing time and prevent fabric damage through adaptive control without requiring complex manual intervention.
Solution Approach 2:
The control unit pre-programmes multiple drum driving patterns corresponding to different laundry types (delicate, normal, heavy-duty). When laundry type is detected, the system selects and applies the pre-optimized driving pattern in advance, avoiding trial-and-error washing and reducing overall washing time while protecting fabrics through pre-planned gentle or vigorous motion sequences.
3Use of energy by moving object
If conventional laundry machines use uniform mechanical forces, then the structure is simple, but energy consumption increases and fabric damage occurs
Solution Approach 1:
The system dynamically adjusts motor power output and drum rotation speed based on detected laundry types. For delicate fabrics, the system uses lower power and slower rotation; for heavy-duty fabrics, higher power and faster rotation are applied. This dynamic energy adjustment optimizes power consumption while the automated control system manages the complexity of variable motion control.
Solution Approach 2:
The control unit modifies operational parameters (rotation speed, acceleration, deceleration rates) according to laundry category. By changing these parameters adaptively, the system achieves energy-efficient washing matched to fabric requirements, avoiding unnecessary energy consumption from overly aggressive motions on delicate items while maintaining effective cleaning for robust fabrics.
4Adaptability or versatility
If conventional laundry machines lack diversified drum motions, then the device is simple to operate, but washing performance is insufficient for different laundry types
Solution Approach 1:
The patent implements a universal drum driving system that can perform multiple washing functions (delicate, normal, heavy-duty) using a single drum through varied motion patterns. By programming different rotation directions and speeds, the system achieves multi-functionality without requiring separate drums or mechanisms for each laundry type, thus improving adaptability while keeping the mechanical structure relatively simple.
Solution Approach 2:
The system uses dynamic motion control to adapt the drum's rotation characteristics to match different laundry requirements. Through real-time adjustment of rotation direction and speed based on sensor input, the single drum performs diverse washing functions effectively, enhancing versatility without adding multiple physical drum components.
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
Improves washing efficiency, reduces washing time, minimizes fabric damage, and enhances customer satisfaction by tailoring mechanical forces and vibrations to the specific needs of different laundry types, while also optimizing energy consumption.
Implementation Method 1
a suspension unit to absorb vibrations
Implementation Method 2
using lifters to lift and drop laundry
Data Source
AI summary
A laundry machine and a control method thereof are provided in which laundering ability may be improved while also improving efficiency and noise/vibration. The laundry machine employs a plurality of drum motions by varying drum rotational speed, drum rotational direction, and drum starting and stopping point, to provide different motion of laundry items in the drum.