Drum Washer Door Unlock Timing During Fill and Drain Cycles
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Solution Overview
Problem
Conventional drum washing machines interrupt their operation to allow additional laundry to be added or removed, leading to inefficient washing and inconvenient use, as the door can only be opened based on the water level in the tub, which hampers continuous operation.
Innovation Solution
A method and system for controlling a drum washing machine that locks the door during operations, releases the lock for predetermined periods after the operation is completed, and re-locks it, allowing users to add or remove laundry without interrupting the cycle by monitoring water supply and drainage times, and informing the user of the door's release state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door is locked during washing operation to prevent water leakage, then safety is improved, but the user cannot add or remove laundry during operation
Solution Approach 1:
The door locking system transitions from a static locked state to a dynamic system that can switch between locked and unlocked states based on operational phase. The control unit dynamically adjusts the locking mechanism to be locked during water supply/drainage phases and unlocked during washing phases, allowing flexible access without compromising safety.
Solution Approach 2:
The door locking mechanism operates periodically, alternating between locked and unlocked states in sync with the washing cycle phases. The door is locked during water supply and drainage operations, then unlocked during washing operations for a predetermined period, creating a rhythmic pattern that balances safety and accessibility.
2Ease of operation
If the operation is interrupted to allow door opening for adding laundry, then accessibility is improved, but washing efficiency deteriorates
Solution Approach 1:
The control unit predicts user needs by automatically unlocking the door during appropriate phases of the washing cycle, eliminating the need for users to interrupt the operation. The system provides access during washing phases when water levels are safe, preventing the need for operational interruptions.
Solution Approach 2:
The washing operation maintains continuous water supply and drainage cycles without interruption. The door locking/unlocking mechanism operates independently during washing phases, allowing users to access laundry while the washing machine continues its washing function uninterrupted, preserving productivity while improving accessibility.
Data Source
AI summary
A drum washing machine and a method of controlling the same. The locked state of a door is released for a predetermined period of time without interrupting water supply or water drainage for a user to open the door, during supplying or draining of water, when a washing or dewatering operation of the drum washing machine is initiated or when the washing or dewatering operation of the drum washing machine is resumed after the washing or dewatering operation of the drum washing machine is interrupted. Consequently, additional laundry may be safely and conveniently put into a rotary tub or the laundry or foreign matter may be removed from the rotary tub with improved washing and dewatering efficiency. To this end, the drum washing machine includes a control unit for locking the door when the washing or dewatering operation is initiated, releasing the locked state of the door for a first predetermined period of time after the washing or dewatering operation is performed for a second predetermined period of time, and locking the door again after the first predetermined period of time elapses.