Tumble Dryer Filter Insert Locking for Correct Flap Closure
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Solution Overview
Problem
Conventional tumble dryers face high manufacturing costs due to the use of rare earth magnets for monitoring the correct installation of the filter insert, and the design prevents cleaning of the heat exchanger, leading to inefficiencies.
Innovation Solution
A mechanical monitoring system using a spring-loaded pin and locking elements, such as a telescoping pin or a cam element, prevents the inspection flap from closing if the filter insert is not properly installed, ensuring correct assembly without the need for expensive magnets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rare earth magnets are used for monitoring filter insert installation, then the monitoring function is achieved, but the manufacturing cost increases significantly
Solution Approach 1:
The patent replaces expensive rare earth magnets with inexpensive mechanical components (spring-loaded pin, locking element, cam element) that perform the same monitoring function. These mechanical components are much cheaper to manufacture and eliminate the need for costly rare earth materials while maintaining reliable monitoring of filter insert installation.
Solution Approach 2:
The patent substitutes the magnetic field-based monitoring system with a purely mechanical monitoring system. The spring-loaded pin with locking element and cam element creates a mechanical interlocking mechanism that physically prevents inspection flap closure when the filter insert is missing, replacing the magnetic monitoring approach with tangible mechanical interaction.
2Stability of the object's composition
If the heat exchanger is fixed in the housing, then the structural stability is improved, but the ease of maintenance deteriorates
Solution Approach 1:
The patent divides the tumble dryer into distinct functional modules: the heat exchanger assembly is separated from the main housing structure, allowing it to be independently accessed and maintained. The mechanical monitoring system is integrated into this modular design, enabling the heat exchanger to remain structurally stable during operation while being removable for cleaning and maintenance through the inspection flap mechanism.
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 solution significantly reduces manufacturing costs by providing a cost-effective mechanical monitoring system that ensures proper filter insert installation, allowing for easier maintenance and operation of the heat exchanger.
Implementation Method 1
The pin as such interacts with a locking element which locks the pin in the telescoped state
Implementation Method 2
The cam element as such can be brought into the unlocking position against the action of gravity
Data Source
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AI summary
The invention relates to a clothes dryer (1) with a housing (2) and a treatment chamber for receiving goods to be dried, and with a device for condensing moisture from the goods to be dried, which generates a process airflow in whose flow channel (11) a filter insert (10) is arranged, wherein the filter insert (10) is accessible from the outside via an inspection flap (9) arranged in the front wall (8) of the housing (2), and wherein the filter insert (10) has sleeve elements (12) for positive insertion in the flow channel (11), which can be plugged onto pin elements (13) arranged in the flow channel (11) in the inserted state, wherein a monitoring element is provided for correct assembly of the filter insert (10).According to the invention, at least one of the pin elements (13) is designed as a monitoring element (14) for correct assembly, which prevents the inspection flap (9) from closing if the filter insert (10) is missing in the flow channel (11).