Dual Lint Filter System with Switch-Activated Blower Control
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Solution Overview
Problem
Existing laundry appliances face challenges in efficiently filtering and managing lint and particulate matter, particularly when the lint filter requires maintenance, leading to potential operational inefficiencies and energy wastage.
Innovation Solution
A laundry appliance with a dual lint filter system, where a first lint filter moves between use and maintenance positions, triggering a switch to adjust blower operation, allowing for variable speed control and ensuring efficient capture of particulate matter by a second, finer filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lint filter is removed for maintenance, then the captured particulate matter is accessible for removal, but the blower continues to operate wasting energy
Solution Approach 1:
The switch is positioned such that the act of removing the lint filter itself triggers the switch to open the circuit and stop the blower. This preliminary action ensures that maintenance access is provided while automatically preventing energy wastage by cutting power before the user even begins cleaning the filter.
2Device complexity
If a single lint filter is used, then the device complexity is low, but the filtration efficiency and particulate matter capture is insufficient
Solution Approach 1:
The filtration system is segmented into multiple filters arranged in series within the airflow path. Each filter captures different sizes or types of particulate matter, with the first filter capturing larger particles and subsequent filters capturing finer particles. This segmentation improves overall filtration efficiency while maintaining manageable complexity through modular arrangement.
Solution Approach 2:
Multiple lint filters are nested within the same housing structure, with each filter positioned in sequence along the airflow path. The filters are contained within the appliance housing, creating a compact nested arrangement that provides enhanced filtration without significantly increasing external dimensions or complexity.
3Productivity
If the blower operates at high speed continuously, then the airflow and drying performance is high, but energy consumption increases
Solution Approach 1:
The blower operation is made periodic rather than continuous. The switch mechanism causes the blower to operate at high speed during the drying cycle, then automatically stops when the lint filter is removed for maintenance. This periodic operation maintains high productivity during needed periods while eliminating energy consumption during maintenance periods.
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 system effectively manages lint filtration by adjusting blower speed and capturing residual particles, enhancing energy efficiency and maintaining appliance performance during filter maintenance.
Implementation Method 1
a blower configured to deliver process air through the second lint filter in the second condition of the switch
Implementation Method 2
a first lint filter operable between a use position and a maintenance position... positioned within the air flow path
Data Source
AI summary
A laundry appliance includes a first lint filter operable between a use position and a maintenance position, a second lint filter proximate to the first lint filter, a switch operable between a first condition and a second condition, and a blower. Movement of the first lint filter from the use position to the maintenance position prompts the switch to enter the second condition from the first condition. The blower is operable to deliver process air through the first and second lint filters in the first condition of the switch and is configured to activate to deliver process air through the second lint filter based on the switch entering the second condition.