Washing Machine Drum with Rounded Bulges to Reduce Laundry Damage
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Solution Overview
Problem
Existing laundry washing or washing-drying machine drums do not effectively prevent damage to laundry during the washing and drying processes, and the design of holes and bulges on the cylindrical body does not optimize fluid circulation and discharge.
Innovation Solution
A drum with a cylindrical body featuring closed curve-shaped bulges formed by alternating concave and convex line segments, where the corners are rounded and the bulges have a ridge and inclined surfaces, with holes and bulges aligned alternately along the axis, facilitating fluid flow and discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional holes and bulges are used on the drum, then manufacturing is simple, but laundry damage occurs and fluid circulation is not optimized
Solution Approach 1:
The bulge contour is designed with rounded corners instead of sharp angles, creating a smooth closed curve shape. This curvature prevents laundry from being damaged by sharp edges while maintaining the bulge's function for fluid circulation and discharge during drum rotation.
Solution Approach 2:
The bulge design incorporates specific geometric features (concave and convex portions in a closed curve) at localized positions on the drum surface. These localized geometric modifications optimize fluid interaction and discharge at specific areas without requiring complex changes to the entire drum structure.
2Productivity
If simple bulge shapes are used, then manufacturing is easier, but fluid circulation and discharge are not optimized
Solution Approach 1:
The closed curve contour with rounded corners creates smooth flow paths for washing liquid during drum rotation. This curved geometry optimizes fluid circulation patterns and discharge efficiency through the holes, improving washing performance without requiring excessively complex manufacturing processes.
Solution Approach 2:
The bulge design modifies specific geometric parameters (contour shape, corner radius, positioning relative to holes) to optimize fluid dynamics. By adjusting these parameters within manufacturing capabilities, the design achieves improved fluid circulation and discharge while maintaining ease of production.
3Reliability
If sharp-cornered bulges are used, then manufacturing is simpler, but laundry is harmed during rotation
Solution Approach 1:
All corners of the bulge contour are rounded to eliminate sharp edges that could damage laundry during drum rotation. This curvature is integrated into the manufacturing process through standard forming techniques, protecting laundry while maintaining manufacturing feasibility.
Solution Approach 2:
The rounded corner design is applied specifically at the critical locations where bulges interact with laundry during rotation. This localized application of curvature provides protection where needed without requiring complex modifications throughout the entire drum structure.
Data Source
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AI summary
The present invention relates to a drum (1) that is suitable for using in laundry washing or laundry washing-drying machines and that comprises a cylindrical body (2), at least one hole (3) located on the cylindrical body (2) and at least one bulge (4) which is located on the cylindrical body (2) and extends from the surface of the cylindrical body (2) towards the rotational axis (E) of the drum (1), and the contour of which is shaped as a polygon.