Drum washing machine
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Solution Overview
Problem
Drum washing machines require periodic professional cleaning due to dirt accumulation on the outer and inner walls, leading to secondary pollution and inefficiencies in water management, which is time-consuming and labor-intensive.
Innovation Solution
A drum washing machine design featuring a front and rear washing drum where the rear drum rotates with a motor, eliminating the need for an outer drum and preventing water accumulation on the outer wall, while incorporating sealing mechanisms to prevent water leakage and enhance operational safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an outer drum is added to enclose the inner drum, then the structural integrity and sealing are improved, but the outer wall becomes a harboring site for dirt and residual water that cannot be cleaned by the user
Solution Approach 1:
The patent removes the outer drum from the traditional double-drum structure, extracting the problematic outer wall that harbors dirt and residual water. The washing machine now has only an inner drum that rotates, eliminating the enclosed interlayer space where dirt accumulates and cannot be cleaned by users.
2Strength
If an outer drum with interlayer space is used, then the drum structure is more robust, but the residual water in the interlayer is not easy to clean and evaporate, leading to bacterial growth
Solution Approach 1:
The outer drum and its interlayer space are completely removed from the structure. This eliminates the enclosed space where residual water would accumulate and evaporate, thereby preventing the harmful environment that promotes bacterial growth.
Solution Approach 2:
The drum structure is segmented into only the essential inner rotating drum, separating the washing function from the protective housing. This segmentation eliminates the interlayer problem while maintaining structural integrity through the housing design.
3Ease of manufacture
If a traditional inner drum and outer drum structure is used, then the washing machine can be manufactured with standard designs, but the user cannot remove the drums to clean the outer wall and inner wall manually
Solution Approach 1:
By removing the outer drum, the patent eliminates the enclosed space between inner and outer drums that prevents user access for cleaning. The simplified structure allows users to easily access and clean the inner drum surface without disassembly.
4Reliability
If an outer drum is present, then the washing machine has a complete enclosed structure, but the residual water between the drums causes secondary pollution to clothes
Solution Approach 1:
The outer drum is extracted from the design, eliminating the interlayer space where residual water accumulates. This prevents the source of secondary pollution that would otherwise transfer to clothes during subsequent washing cycles.
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
The design eliminates the need for periodic cleaning of the outer and inner drum walls, reduces water consumption, and enhances the washing machine's operational safety and efficiency by preventing water leakage and ensuring effective washing and drainage processes.
Implementation Method 1
The rear washing drum is operative to rotate relative to the front washing drum
Implementation Method 2
clothes and water in the washing drum are driven to rotate to lift the clothes, which are then allowed to fall and be beaten
Implementation Method 3
a sealing groove is arranged in a side wall of the front washing drum contacting the door and window or in a side wall of the door and window contacting the front washing drum, and a first sealing ring is disposed in the sealing groove
Data Source
AI summary
A drum washing machine includes a washing machine housing. A washing drum is disposed in the washing machine housing and includes a front washing drum and a rear washing drum. The front washing drum is sealedly connected to the rear washing drum. The rear washing drum is operative to rotate relative to the front washing drum. The rear washing drum is further operative to rotate along with a motor, and the front washing drum is stationary when the rear washing drum is rotating along with the motor.