Clothes treatment apparatus
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Solution Overview
Problem
Existing laundry treating apparatuses face limitations in evenly drying laundry and preventing damage during the drying cycle due to the tumbling motion, which can cause wear, shrinkage, and uneven drying, and lack the ability to rapidly change the rotation speed and direction of the drum.
Innovation Solution
The apparatus introduces a shaking motion during the drying cycle by periodically varying the rotation speed of the drum between multiple speeds, allowing for separation of laundry items based on dryness and preventing damage through controlled speed changes and direction adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the drum is rotated using a belt and pulley system, then the structure can be simplified by omitting a reducer, but the rotational acceleration is limited and the drum cannot rapidly change rotation direction
Solution Approach 1:
The patent replaces the belt-pulley mechanical transmission system with a direct-drive motor system. The motor is directly coupled to the drum rotation shaft, eliminating the belt, pulley, and reducer components. This substitution enables rapid rotational acceleration and bidirectional rotation while maintaining structural simplicity.
2Productivity
If the drum rotates continuously in one direction, then drying efficiency is maximized through tumbling motion, but laundry items become unevenly dried and may be over-dried or damaged
Solution Approach 1:
The patent implements periodic reversal of the drum rotation direction. The control unit reverses the rotation direction of the drum at predetermined time intervals during the drying cycle. This periodic action prevents laundry items from becoming unevenly dried or over-dried by alternately exposing different portions of the laundry to the hot air flow, while also preventing damage from continuous unidirectional tumbling.
Data Source
AI summary
The present invention relates to a clothes treatment apparatus which provides various optimized drum motion combinations that can prevent damage to clothes or prevent shrinkage of the clothes in each of the preheating section, a constant rate drying section, a falling rate drying section, and a cooling section.