Clothes dryer
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Solution Overview
Problem
Conventional clothes dryers lack the ability to separate and dry delicate items efficiently, leading to uneven drying of clothes with different materials, as they must be mixed in a single drum, resulting in incomplete drying and manual sorting.
Innovation Solution
A clothes dryer design featuring a sub drum that can rotate independently, allowing for separate drying of clothes within a main drum, with a drive device and power transmission system for stable rotation, and a sealing mechanism to prevent lint and moisture leakage, enhancing drying efficiency and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If clothes are dried in a single drum, then the structure is simple, but the ability to separate and dry different types of clothes is lost
Solution Approach 1:
The sub drum is nested inside the main drum, allowing the sub drum to rotate independently within the main drum's interior space. This nesting configuration enables separate drying of different clothes types without requiring separate dryers, thus improving versatility while maintaining relatively simple structure.
Solution Approach 2:
The drying space is segmented into two independent zones: the main drum for general clothes and the sub drum for delicate or quick-drying items. This segmentation allows different drying conditions to be applied to different clothes types simultaneously, resolving the contradiction between versatility and structural simplicity.
2Manufacturing precision
If all clothes are mixed in the drum, then the device complexity is low, but the drying uniformity of different materials is poor
Solution Approach 1:
The drum assembly is segmented into a main drum and a sub drum that can rotate independently. This allows clothes of different materials to be separated into different rotating compartments, each experiencing uniform drying conditions appropriate to their material type, thereby improving drying uniformity without excessive complexity.
Solution Approach 2:
The sub drum is designed to rotate independently from the main drum, creating dynamic separation of clothes. This rotational independence allows different drying speeds and patterns for different compartments, improving drying uniformity across different fabric types while maintaining a relatively simple overall structure.
3Productivity
If a sub drum is added for separate drying, then the drying capacity is improved, but the device complexity increases
Solution Approach 1:
The sub drum is nested within the main drum's interior space, utilizing otherwise wasted volume. This nesting approach increases drying capacity by effectively doubling the usable drying space without requiring a proportionally larger outer casing, thus improving productivity with moderate complexity increase.
Solution Approach 2:
The sub drum serves multiple functions: it provides separate drying space for delicate items, enables rotation for improved air circulation, and can be independently controlled. This multi-functionality justifies the added complexity by delivering significant productivity improvements through a single component.
4Productivity
If the sub drum rotates for better drying, then the drying efficiency is improved, but the stability of the drum assembly is reduced
Solution Approach 1:
The sub drum is designed to rotate independently on a vertical axis within the main drum, enabling dynamic air circulation and improved drying efficiency. The rotation mechanism is supported by bearings and guides that maintain stability during operation, reconciling the need for movement with assembly stability.
Solution Approach 2:
A guide structure and support mechanism act as intermediaries between the rotating sub drum and the stationary main drum. These intermediary components transfer and distribute mechanical loads, allowing the sub drum to rotate smoothly while maintaining overall assembly stability and preventing excessive vibrations.
Data Source
AI summary
Disclosed herein is a clothes dryer. The clothes dryer includes a casing in which a first drum is provided, the casing being formed with an introduction opening of clothes, and a door provided at the casing to open or close the introduction opening, the door including a drum assembly. The drum assembly includes a second drum to be rotatable, so that clothes are introduced into and dried in the first and second drums.