Water replenishment control method for multi-tub washing machine
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Solution Overview
Problem
Multi-drum washing machines face challenges in efficient water supply and replenishment, leading to inadequate water levels during washing processes, which can result in reduced washing effectiveness and increased energy consumption, especially when multiple drums operate simultaneously.
Innovation Solution
Implementing a control method where one drum waits for the other to complete its water supply or replenishment process before initiating its own, using sensors to monitor water levels and quality, and allowing only one drum to perform water supply or replenishment at a time to prevent simultaneous operations and ensure adequate water levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple drums execute water supply and replenishment processes simultaneously, then water supply speed increases, but control complexity increases and water level stability decreases
Solution Approach 1:
The patent implements periodic action by establishing a predetermined execution order for water supply and replenishment processes across multiple drums. Instead of simultaneous operations, drums follow a scheduled sequence where water supply and replenishment alternate in time, ensuring controlled water level management while maintaining overall system productivity through continuous periodic operation.
2Stability of the object's composition
If water supply and replenishment processes are executed alternately between drums, then water level stability improves, but user waiting time increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing an execution order for water supply and replenishment processes before operation begins. The control unit stores predetermined sequences that determine which drum performs which operation at each time step, allowing the system to maintain stable water levels while minimizing waiting time through optimized pre-planned scheduling.
3Manufacturing precision
If the inlet valve opens and closes frequently for alternating water supply-replenishment, then water level control precision improves, but valve wear increases and reliability decreases
Solution Approach 1:
The patent reduces valve operation frequency by implementing periodic control patterns where the inlet valve remains open during water supply phases and closed during replenishment phases. By coordinating drum operations to follow a predetermined sequence, the system achieves precise water level control while minimizing the number of valve opening/closing cycles, thereby extending valve life and improving reliability.
Data Source
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AI summary
A water replenishment control method for a multi-drum washing machine. The washing machine comprises at least a first washing drum (1) and a second washing drum (2). While the first washing drum (1) is in a washing process, if the water level of washing water is lower than a set value, then a water replenishment process is executed, and before that, it is necessary to determine whether or not the second washing drum (2) is executing a water replenishment process; if yes, the first washing drum pauses the water replenishment process, and the second washing drum executes precedence preferentially; if no, the first washing drum executes water replenishment process and terminates it when the water level of the washing water reaches a set water level. Before a washing drum executes the water replenishment process, a procedure executed by another washing drum is determined, thus preventing concurrent water supply to both washing drums that leads to unstable water pressure and thereby affecting a washing process. At the same time, the water replenishment process control scheme of the present disclosure is simple and reliable, provides significant effects, and facilitates the promotion of use.