Drum Washer Water Splashing to Prevent Stirrer Motor Locking
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Solution Overview
Problem
In drum washing machines, dry washings can cause high friction between the stirring body and the washings, leading to increased load on the driving motor and potential locking issues due to the higher friction coefficient in a dry state.
Innovation Solution
A water supply mechanism that splashes water onto the surface of the rotating body, reducing the friction coefficient and alleviating the load on the motor by using a water storage part and outflow port system integrated into the drum and rotating body, allowing water from the outer tank to be drawn up and applied to the stirring body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a stirring body is arranged at the rear part of the drum to improve detergency, then cleaning performance is improved, but the friction coefficient between the stirring body and dry washings increases, leading to motor locking
Solution Approach 1:
The patent applies preliminary action by introducing a water supply mechanism that wets the stirring body before the washing process begins. This pre-wetting reduces the friction coefficient between the stirring body and dry washings, preventing motor locking while maintaining the improved cleaning performance provided by the stirring body structure
Solution Approach 2:
The patent changes the physical state parameter of the stirring body surface from dry to wet by supplying water. This parameter change reduces the friction coefficient, allowing the stirring body to rotate smoothly with the motor without locking, while still providing effective washing action
2Manufacturing precision
If the drum and stirring body rotate at different rotating speeds to improve washing and rinsing, then cleaning performance is improved, but the load on the driving motor increases due to high friction from dry washings
Solution Approach 1:
The water supply mechanism performs preliminary action by wetting the washings and stirring body before differential rotation begins. This reduces the friction coefficient, thereby reducing the load on the driving motor while allowing the drum and stirring body to rotate at different speeds for improved washing quality
3Ease of operation
If dry washings are thrown into the drum, then loading is simplified, but the friction coefficient between washings and stirring body becomes too high, causing operational faults
Solution Approach 1:
The patent introduces water as an intermediary substance between the dry washings and the stirring body. This intermediary reduces the friction coefficient through wetting, preventing motor locking while allowing simplified loading of dry washings into the drum
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 solution improves cleaning performance and prevents motor locking and cloth damage by reducing friction between the stirring body and washings, ensuring smooth operation of the drum washing machine.
Implementation Method 1
the water supply mechanism part splashes water to the surface of the rotating body, so as to wet the rotating body and washings in contact with the rotating body, thereby reducing a friction coefficient of the rotating body and the washings
Data Source
AI summary
Disclosed is a drum washing machine, including: a drum configured in an outer tank and capable of rotating by using an inclination axis as center; a stirring body configured at a rear part of the drum and including main blades in contact with washings; a driving unit enabling the drum and the stirring body to rotate at different rotating speeds; and a water supply mechanism part configured to splash water to a surface of the stirring body. The water supply mechanism part includes a first water storage part capable of moving between a position in water soaked in the outer tank and a position higher than the water and storing water when soaked in water of the outer tank, and a first outflow port capable of enabling water stored in the first water storage part to flow out to the surface of the stirring body at an upper position.