Magnetic Door-Mounted Dryer Filter for Easy Lint Maintenance
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Solution Overview
Problem
Existing tumble dryer designs face issues with filter maintenance and operation, as filters can become clogged, leading to undesirable air backup and potential contamination of the heat exchanger, and existing solutions do not simplify the detachment and reinsertion process effectively.
Innovation Solution
A magnetic holding force is used to attach the filter to the door, allowing easy detachment and reinsertion, with an additional filter mechanism that can be folded and held in place by magnetic attraction, preventing it from folding down excessively and ensuring proper air flow and operation only when the door is closed and the filter is in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter is attached to the door using traditional mechanical fastening methods, then the filter is securely held in place, but the detachment and reinsertion process becomes complex and time-consuming
Solution Approach 1:
The patent replaces traditional mechanical fastening systems (screws, clips, latches) with a magnetic field-based attachment mechanism. The filter holder contains magnetic elements that attract to corresponding magnetic elements in the door, creating a secure yet easily detachable connection. Users can simply push the filter to detach it from the door, and the magnetic attraction automatically guides reinsertion, eliminating complex mechanical operations.
Solution Approach 2:
The magnetic attachment system provides self-aligning and self-latching functionality. When the filter is brought near the door, the magnetic field automatically guides it into the correct position and secures it without requiring manual alignment or activation of fastening mechanisms. Similarly, detachment is achieved by simply overcoming the magnetic force, with the system self-adjusting during the process.
2Ease of operation
If the filter is made detachable for easy maintenance, then cleaning and replacement become simpler, but the filter may become unintentionally detached during operation
Solution Approach 1:
The magnetic field provides a secure holding force that is sufficient to retain the filter during dryer operation but can be easily overcome by deliberate user action. The magnetic attraction ensures the filter remains firmly attached during the drying cycle, while maintenance becomes simple - users only need to push the filter to detach it, eliminating the need for tools or complex release mechanisms.
Solution Approach 2:
The magnetic attachment system is designed to provide immediate and reliable retention as soon as the filter is placed on the door, preventing unintentional detachment during operation. The magnetic field is continuously active, ensuring the filter is secured before the dryer starts operating, while still allowing easy removal when the user intentionally interacts with the filter.
3Ease of operation
If a magnetic holding force is used to attach the filter to the door, then detachment and reinsertion become easy, but additional magnetic components increase device complexity
Solution Approach 1:
The magnetic elements are integrated into the existing filter holder structure and door assembly. The filter holder contains magnetic elements that are combined with the holder's mechanical structure, and corresponding magnetic elements are integrated into the door's internal components. This merging approach minimizes additional parts while achieving the desired magnetic attachment functionality.
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 simplifies filter maintenance and operation by allowing easy detachment and reinsertion, prevents air contamination, and ensures the dryer operates only when the filter is correctly positioned and the door is closed, enhancing the efficiency and reliability of the drying process.
Implementation Method 1
a filter held by a magnetic holding force on a door of a household appliance, in particular on a loading door of a tumble dryer
Implementation Method 2
an element that generates a magnetic field, in particular a permanent magnet, which interacts with a magnetic switch arranged on a front wall of the household appliance in order to control release or prevention of a drying operation
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A household appliance, in particular a clothes dryer, has a drying chamber (2) and a door (1) for opening and closing the drying chamber (2). A filter (3) is held in an operating position by a magnetic holding force against the door (1). In this operating position and with the door (1) closed, a process airflow from the drying chamber (2) can be directed through the filter (3).