Drum Washer Dual-Rotation Control for Delicate and Standard Loads
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Solution Overview
Problem
Drum washing machines face challenges in effectively washing delicate clothes and those with drying marks due to insufficient mechanical force, as existing designs either apply too much or too little force, leading to potential damage and poor cleaning efficiency.
Innovation Solution
A drum washing machine with a control system that allows the drum and rotating body to operate in different modes, including a second driving form where the drum and rotating body rotate at the same speed, and a third driving form where the rotating body is in free rotation, enabling gentle washing of delicate items and preventing twining, while maintaining effective cleaning for standard washes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the drum and rotating body rotate at different rotation speeds to increase mechanical force on washings, then detergency is improved, but delicate clothes with poor resistance to mechanical force are damaged
Solution Approach 1:
The patent applies dynamics by enabling the driving part to switch between different driving forms (first driving form with different rotation speeds for standard washing, second driving form with same rotation speed for delicate clothes). This dynamic adaptability allows the system to adjust mechanical force levels according to the washing mode, resolving the contradiction between achieving high detergency and preventing damage to delicate fabrics.
2Object-affected harmful factors
If the drum and rotating body rotate integrally at the same rotation speed to reduce mechanical force, then delicate clothes are protected from damage, but detergency is reduced
Solution Approach 1:
The system resolves this contradiction through dynamic operation modes. In the second driving form, the drum and rotating body rotate integrally at the same speed to provide gentle washing for delicate clothes. The control part automatically switches between driving forms based on the selected washing mode, ensuring adequate detergency while protecting delicate fabrics from excessive mechanical force.
3Device complexity
If a single driving form is used for all washing types, then device complexity is reduced, but adaptability to different washing modes is insufficient
Solution Approach 1:
The patent implements universality by designing a driving part that can perform multiple functions through different driving forms. The same driving part structure is used across all washing modes, but it can operate in at least two distinct driving forms (first driving form with different rotation speeds, second driving form with same rotation speed). The control part manages the switching between these forms, providing multi-functionality without requiring separate driving mechanisms for each washing type.
Data Source
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AI summary
A drum washing machine (1) capable of performing washing applicable to various washings is provided. The drum washing machine (1) includes: an outer tank (20) provided in a shell (10); a drum (22), which is provided in the outer tank (20) and configured to rotate with a horizontal shaft or an inclination shaft inclining relative to a horizontal direction as a center; a driving part (30), configured to be operated in a first driving form and a second driving form, the first driving form refers to a form in which the drum (22) and a rotating body (24) are enabled to rotate at different rotation speeds, and the second driving form refers to a form in which the drum (22) and the rotating body (24) are enabled to rotate integrally at a same rotation speed; and a control part (801), configured to control actions of the driving part (30). The control part (30) switches the driving form in accordance with a corresponding washing mode in a washing process or a rinsing process so that a driving unit is operated in a biaxial driving form or a uniaxial driving form (S105 to S107).