Washing method
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Solution Overview
Problem
Eccentricity of laundry in a washing machine's inner tub leads to collisions with the outer tub, causing noise and reducing efficiency.
Innovation Solution
A washing method that involves rotating the inner tub in one direction initially, detecting its rotating direction, and then reversing the direction after a predetermined time, potentially with different speeds or alternating directions, to eliminate eccentricity and prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the inner tub stops for a certain time period between washing processes, then energy consumption is reduced and washing processes can be separated, but laundry eccentricity occurs causing collisions between inner tub and outer tub
Solution Approach 1:
Before the inner tub stops completely, a preliminary rotation is performed in a predetermined direction to pre-position the laundry and prevent eccentricity from developing during the stop period. This preliminary action ensures that when the tub resumes operation, the laundry is already in a balanced state, avoiding collisions with the outer tub.
Solution Approach 2:
The washing process incorporates periodic rotations in predetermined directions between stopping periods. Instead of a single continuous rotation, the system uses multiple short rotation cycles with specific directions, maintaining laundry balance throughout the washing process while allowing for energy-efficient pauses.
2Device complexity
If the inner tub rotates in a predetermined direction after stoppage irrespective of previous direction, then the washing process can be simplified and standardized, but laundry eccentricity increases causing noise and reduced efficiency
Solution Approach 1:
Before each rotation phase after stoppage, the system performs a preliminary rotation in a predetermined direction to establish proper laundry distribution. This preliminary action simplifies the control logic by using fixed directional patterns while preventing the harmful effects of eccentricity and noise through proper laundry positioning.
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
This method effectively eliminates eccentricity, reduces noise, and improves the rotating performance of the inner tub by reversing its rotation direction after stopping, thereby preventing collisions and enhancing operational efficiency.
Implementation Method 1
a washing machine is an appliance that treats clothing or bedding (hereinafter, referred to as 'laundry') using physical action and/or chemical action
Implementation Method 2
a washing machine is an appliance that treats clothing or bedding (hereinafter, referred to as 'laundry') using physical action and/or chemical action
Data Source
AI summary
A washing method according to the present invention comprises: a first rotation step for rotating an inner tub; a rotating direction detecting step for detecting the rotating direction of the inner tub; and a second rotation step for starting to rotate the inner tub in the opposite direction to the rotating direction of the inner tub when the rotation of the inner tub stops in the first rotation step. When the inner tub stops over a predetermined time and then restarts, the inner tub starts to rotate in the opposite direction to the rotating direction when the inner tub stops, thereby reducing the eccentricity of the inside of the inner tub, inhibiting collisions between the inner tub and an outer tub, reducing noise during collisions, and improving the rotation performance of the inner tub.