Inclined Laundry Drum Structures for Better Spin Dewatering
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Solution Overview
Problem
Current laundry drums struggle to achieve optimal dewatering during spinning, with existing structures resulting in residual moisture levels that are not adequately reduced, especially at higher spin speeds.
Innovation Solution
The design incorporates coarser, multi-part structures along the drum's circumference that are inclined at specific angles, covering at least 25% of the drum shell, which deviates from conventional circular ring profiles to enhance dewatering efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional small-scale structures with heights up to 2.5 mm are used on the drum shell, then the drum maintains structural integrity and aesthetic appeal, but the dewatering efficiency during spinning is insufficient and residual moisture levels remain high
Solution Approach 1:
The patent applies parameter changes by significantly increasing the structure height from conventional 2.5 mm to at least one-seventh of the laundry ring thickness (typically 10-50 mm), changing the scale and geometry of drum structures to improve dewatering performance while maintaining structural integrity through optimized dimensional parameters
2Productivity
If the drum shell is equipped with structures having significant height (at least one-seventh of laundry ring thickness), then dewatering efficiency improves with up to 10% less residual moisture, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The drum shell is segmented into multiple circumferential structures distributed around the drum perimeter, with each structure independently formed with specific geometric parameters. This segmentation allows the complex dewatering function to be distributed across multiple simpler elements rather than requiring one complex continuous structure
Solution Approach 2:
The structures feature curved surfaces with specific radii of curvature that optimize the interaction with laundry items during spinning. The curved geometry naturally guides moisture movement and laundry item positioning, achieving improved dewatering through form-follows-function design rather than complex mechanical mechanisms
3Productivity
If structures with specific inclination angles (5° to 38°) are implemented on the drum shell, then dewatering performance is optimized, but the manufacturing precision requirements increase
Solution Approach 1:
The patent defines specific parameter ranges for structure inclination angles (5° to 38°) rather than requiring a single precise value. This parameter range approach provides manufacturing tolerance flexibility while maintaining effective dewatering performance, balancing optimization with manufacturability
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 design achieves up to 10% less residual moisture compared to conventional drums, with improved dewatering effects and reduced vibration, while maintaining structural integrity and aesthetic appeal.
Implementation Method 1
At the end of a spin cycle, when a spin speed above an application speed is reached, the laundry items are pressed against the drum shell by the centrifugal force generated during the spin cycle
Data Source
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AI summary
The invention relates to a laundry drum T for a laundry treatment machine having a drum shell 3 which has structures 1 distributed in the circumferential direction and raised in the radial direction in relation to an axis of rotation A of the laundry drum with a structure height H, the shell having a spacing R from the drum axis, and a ring of laundry 4, which can be formed in particular in the laundry treatment machine during spin-drying operation, having a thickness D, characterized in that the structures 1, 1a. 1b at least have cross-sectional profiles which, in relation to the drum shell 3, with a spacing R from the drum axis, have at least a slight inclination with an angle of inclination I , wherein the structure height H is at least one-seventh of the thickness D of the ring of laundry 4 which forms. Furthermore, the invention also includes a laundry drum in which first structures 1, 1a, 1b are formed in the circumferential direction of the drum shell over a circumferential length of 2piR, and second structures 10, 10a, 10b are formed in the axial direction of the drum shell over a length d. The laundry drum according to the invention belongs to a domestic appliance for treating laundry, which is a washing machine or a washer/dryer.