Dual-Filter Lint Removal Assembly with Dynamic Positioning
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Solution Overview
Problem
Laundry appliances lack an effective mechanism for efficiently collecting and maintaining foreign particulates, such as lint and dog hair, within the airflow path during operation, leading to reduced performance and increased maintenance needs.
Innovation Solution
A foreign particulate removal assembly with a dual-filter system, where a first lint filter with larger openings is positioned upstream of a second lint filter with smaller openings, both coupled by a binding member, allowing the filters to move between collection and maintenance positions within the airflow path, and a transparent panel for visibility of filter status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single lint filter is used in the airflow path, then the device complexity is low, but the manufacturing precision and foreign particulate removal effectiveness are insufficient
Solution Approach 1:
The filter system is segmented into a first lint filter with larger openings and a second lint filter with smaller openings, arranged in series within the airflow path. This segmentation allows each filter to target different size ranges of foreign particulates, improving overall removal effectiveness while maintaining manageable complexity through modular design
Solution Approach 2:
Different regions of the filter system have different opening sizes optimized for specific functions: the first lint filter has larger openings for capturing bigger particulates with less resistance, while the second lint filter has smaller openings for capturing finer particulates, creating local quality variations that enhance overall performance
2Manufacturing precision
If the lint filter is positioned within the housing during operation, then the foreign particulate removal effectiveness is high, but the ease of operation for maintenance is poor
Solution Approach 1:
The filter system is designed with dynamic positioning capability, allowing it to move between a first position where both filters are within the airflow path for optimal filtration, and a second position where the filters are accessible outside the housing for easy maintenance. This dynamic repositioning resolves the contradiction between operational effectiveness and maintenance accessibility
3Manufacturing precision
If the second lint filter with smaller openings is added downstream, then the foreign particulate removal effectiveness improves, but the device complexity increases
Solution Approach 1:
The second lint filter with smaller openings is nested within or adjacent to the first lint filter structure, with both filters sharing common support elements and housing features. This nesting approach allows the dual-filter system to achieve enhanced particulate removal precision while minimizing the increase in overall device complexity through space-efficient arrangement
4Reliability
If the binding member couples both lint filters together, then the reliability of the filter system improves, but the device complexity increases
Solution Approach 1:
The binding member integrates multiple functions into a single component: it couples the first and second lint filters together, provides structural support for both filters, enables coordinated movement between positions, and maintains proper spacing and alignment. This merging of functions improves system reliability while avoiding the complexity increase that would result from using separate components for each function
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 dual-filter system effectively captures foreign particulates, improving appliance performance and user visibility of filter saturation, facilitating timely maintenance and reducing the risk of particulates re-entering the drum during filter removal.
Implementation Method 1
a first lint filter that defines a plurality of first lint filter openings, a second lint filter that defines a plurality of second lint filter openings that are smaller than the plurality of first lint filter openings, such that the second lint filter is configured to collect foreign particulates that pass through at least one of the plurality of first lint filter openings
Data Source
AI summary
A laundry appliance includes a cabinet, a drum, a housing, a foreign particulate removal assembly, and a blower. The foreign particulate removal assembly includes a first lint filter that defines a plurality of first lint filter openings, a second lint filter that defines a plurality of second lint filter openings that are smaller than the plurality of first lint filter openings, such that the second lint filter is configured to collect foreign particulates that pass through at least one of the plurality of first lint filter openings, and a binding member that couples the first lint filter to the second lint filter. The foreign particulate removal assembly is operable between a collection position and a maintenance position. In the collection position, at least the second lint filter is positioned within the housing. In the maintenance position, the second lint filter is positioned outside of the housing.