Twin-Tub Washing Machine Control for Sequential Water and Drying Loads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional twin-tub washing machines face issues with simultaneous operation of washing tubs, leading to inadequate water supply, incomplete drainage, noise due to resonance, and electrical overload during dehydrating or drying processes, which affect efficiency and machine reliability.
Innovation Solution
A method of controlling a twin-tub washing machine that prioritizes operations based on available resources and tub conditions, delaying or sequencing commands for water supply, drainage, heating, and drying processes to ensure each tub receives sufficient resources and prevent overload, noise, and breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If water supplying process is performed in two washing tubs simultaneously, then water supply speed is improved, but water supply sufficiency deteriorates
Solution Approach 1:
The control unit checks whether another tub is currently receiving water supply before initiating water supply to a new tub. This preliminary check prevents simultaneous water supply operations, ensuring that each tub receives adequate water volume while maintaining efficient sequential operation. The system performs the water supply operation in advance for one tub before starting the next tub.
2Speed
If draining process is performed in two washing tubs simultaneously, then draining speed is improved, but draining completeness deteriorates
Solution Approach 1:
The control unit checks whether another tub is currently draining before initiating draining operation for a new tub. This sequential control ensures complete drainage of one tub before starting another, preventing water backup and ensuring thorough drainage while maintaining efficient operation flow.
3Productivity
If dehydrating process is performed in two washing tubs simultaneously, then productivity is improved, but noise and machine stability deteriorate
Solution Approach 1:
The control unit checks whether another tub is currently performing dehydration before starting dehydration in a new tub. This sequential operation prevents simultaneous high-speed rotation of both drums, eliminating resonance and excessive vibration while maintaining high productivity through efficient back-to-back operation.
4Productivity
If water heating process and drying process are performed simultaneously in two washing tubs, then productivity is improved, but electrical load and component reliability deteriorate
Solution Approach 1:
The control unit checks whether water heating or drying operations are currently underway in another tub before initiating these energy-intensive processes in a new tub. This sequential control prevents simultaneous operation of multiple heaters and drying devices, avoiding electrical overload and potential component damage while maintaining efficient workflow through immediate sequential operation.
Data Source
AI summary
A method of controlling a washing machine having a first washing tub and a second washing tub, the method having the operations: receiving a first operating command to be performed in the first washing tub; determining whether the operating command can be performed; and when the operating command can be performed, performing the operating command in the first washing tub.