Laundry Drum Fine Surface Structure for Lower Clothing Abrasion
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Solution Overview
Problem
Laundry drums for treatment machines often fail to adequately protect clothing from abrasion during the washing and drying processes, leading to mechanical stress and wear.
Innovation Solution
A laundry drum with a fine structure aligned in the circumferential direction and having a peak-to-valley height range of greater than 2 µm to 50 µm, with a secondary orientation having a peak-to-valley height less than the primary, reducing contact points and enhancing sliding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a smooth drum surface is used, then the laundry treatment is gentle, but the mechanical washing treatment effect is insufficient
Solution Approach 1:
The drum surface is equipped with fine structures only in specific locations (at the front and rear of the drum, and in the lifting area), rather than covering the entire surface. This localized application provides mechanical washing effect where needed while keeping other areas smooth to protect laundry from abrasion.
Solution Approach 2:
The fine structures have specifically controlled parameters: height between 10-50 μm, length 1-5 mm, and spacing 0.5-2 mm. These parameter optimizations ensure the structures provide sufficient mechanical washing effect while minimizing abrasion on laundry.
2Productivity
If coarse structures are added to enhance washing treatment, then the mechanical washing effect improves, but the abrasion on laundry increases
Solution Approach 1:
The invention uses fine structures with height of 10-50 μm instead of traditional coarse structures. This parameter change provides sufficient mechanical washing effect while significantly reducing abrasion on laundry compared to conventional coarse structures.
Solution Approach 2:
The fine structures are applied partially rather than covering the entire drum surface. They are located at the front and rear of the drum and in the lifting area, providing washing effect where needed without excessive mechanical stress on laundry throughout the entire drum.
3Ease of operation
If the fine structure has high peak-to-valley height to reduce contact points, then sliding performance improves, but abrasion may increase
Solution Approach 1:
The fine structures have optimized parameters with height of 10-50 μm and spacing of 0.5-2 mm. These parameters are carefully balanced to provide sufficient sliding performance while preventing excessive abrasion on laundry.
Solution Approach 2:
The fine structures are applied only in specific areas (front, rear, and lifting zones) rather than the entire drum surface, providing sliding assistance where needed without causing excessive abrasion in other areas.
Data Source
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AI summary
The invention relates to a washing drum for a laundry treatment machine with a drum shell (2) which has a structure (8, 14) on an inner surface (6) facing the laundry during the washing process. To provide a washing drum for a laundry treatment machine with a drum shell (2) in which the laundry is even better protected against abrasion or the like, it is proposed that the structure (14) be designed as at least one fine structure (14) with a main orientation (16), wherein the fine structure (14) is defined at a 90° angle to the main orientation (16) of the fine structure (14) by a roughness depth RZ in a range from greater than RZ = 2 µm to RZ = 50 µm, preferably in a range from greater than RZ = 10 µm to RZ = 50 µm.