Tumble dryer
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Solution Overview
Problem
Existing tumble dryers have limited accessibility and filter surface area in the door region, leading to high flow losses and difficulty in cleaning the air duct.
Innovation Solution
A large-area fluff filter with multiple sieve levels is integrated into the door area, allowing easy removal and installation of individual filter inserts, reducing flow losses and enhancing accessibility for cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the fluff filter is permanently installed below the coarse screen in the process air duct, then the filter structure is simple, but the filter surface area is small and accessibility for cleaning is poor
Solution Approach 1:
The filter system is divided into multiple filter levels (first filter level, second filter level, third filter level) arranged at different positions. Each filter level can be independently accessed and cleaned, increasing the total filter surface area while maintaining ease of maintenance. The segmentation allows the filter to occupy more space in the air duct without complicating the overall structure.
2Stability of the object's composition
If the fluff filter is permanently installed in the process air duct, then the filter structure is stable, but accessibility for cleaning is difficult
Solution Approach 1:
The filter is segmented into multiple levels with different accessibility characteristics. The first filter level is positioned for easy access, the second filter level is intermediate, and the third filter level is deeper in the duct. This segmentation allows each filter section to be cleaned at different maintenance intervals without requiring complete disassembly of the air duct system.
Solution Approach 2:
The filter system incorporates removable or accessible filter elements that can be taken out for cleaning while the overall filter structure remains installed in the air duct. This dynamic accessibility allows maintenance without complete disassembly, maintaining both stability and ease of operation.
3Device complexity
If a single filter level is used in the door area, then the device complexity is low, but the filter surface area is limited and flow losses are high
Solution Approach 1:
The filter system uses multiple filter levels (first, second, and third filter levels) positioned at different locations in the air duct. This segmentation increases the total filter surface area, reducing airflow resistance and energy losses while maintaining a relatively simple overall structure that integrates with the existing air duct system.
Solution Approach 2:
The filter system extends in multiple dimensions within the air duct cross-section. By arranging filter levels at different heights and positions, the total filter surface area is maximized within the available space, reducing flow losses without requiring a completely new complex filter system.
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 solution provides a visible and accessible filter system with increased surface area, reducing flow losses and making air duct cleaning easier, while maintaining a secure door seal and optimal airflow.
Implementation Method 1
a blower (6) and a heating device (7) for generating a process air flow which, when the door (4) is locked, flows through the drum (3) via a fluff filter (9) in the edge region (8) of the loading opening (5)
Data Source
Figure 1
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AI summary
The invention relates to a tumble dryer (1) with a drum (3) rotatably mounted in a housing (2), a loading opening (5) that can be closed with a door (4), and a fan (6) and a heating device (7) for generating a flow of process air which, when the door (4) is in the locked state, flows through the drum (3) via a corresponding opening (10) provided with a lint filter (9) in the edge (8) of the loading opening (5) which fills a partial area of the filling ring ( 11) forms. According to the invention, it is proposed that the fluff filter (9) be formed from a sieve insert (12) with several filter levels (13, 14, 15), which forms a partial area of the filler ring (11) on the front side of the housing and is inserted or integrated therein in a form-fitting manner.