Laundry Machine Multi-Step Balancing Control to Reduce Spinning Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laundry machines generate significant noise and vibration during the spinning cycle due to eccentric loading and mechanical resonance, which existing technologies have not adequately addressed.
Innovation Solution
A control method for a laundry machine that includes a balancer with a suspension assembly and a rear gasket to reduce vibration, featuring multiple balancing steps during the spinning cycle, and a ball balancer system with adjustable ball positions to counteract unbalance and minimize noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drum rotates at high speed during spinning cycle, then water removal efficiency is improved, but noise and vibration increase significantly
Solution Approach 1:
The patent performs preliminary balancing actions before the high-speed spinning phase. The controller executes balancing steps at lower speeds (first rotation speed and second rotation speed) to adjust balancer ball positions and counteract eccentricity before reaching the high-speed spinning phase, thereby reducing vibration and noise during efficient water removal
Solution Approach 2:
The patent implements periodic balancing actions during the spinning cycle by rotating the drum at different speeds multiple times. The controller alternates between high-speed spinning and lower-speed balancing phases, creating a periodic pattern that maintains water removal efficiency while periodically reducing vibration and noise through balancer adjustment
2Device complexity
If single balancing step is used, then control process is simplified, but vibration reduction effectiveness is insufficient
Solution Approach 1:
The patent segments the balancing process into multiple distinct steps: a first balancing step at a first rotation speed, a second balancing step at a second rotation speed, and optionally a third balancing step at a third rotation speed. Each step targets different vibration characteristics, collectively achieving superior vibration reduction while maintaining manageable control complexity through systematic division
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 method effectively reduces noise and vibration by implementing multiple balancing steps and using a ball balancer system to manage unbalance, enhancing the operational stability and quietness of the laundry machine.
Implementation Method 1
a ball balancer system with adjustable ball positions to counteract unbalance and minimize noise
Implementation Method 2
a control method for a laundry machine that includes a balancer with a suspension assembly and a rear gasket to reduce vibration
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A control method of a laundry machine is disclosed. The control method of a laundry machine provided with a balancer includes balancing step performed at least three times in a spinning cycle. According to the control method of the present invention, noise of the laundry machine can be reduced effectively when the spinning cycle is carried out.