Filter cassette
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Solution Overview
Problem
The fitting and replacement of filter cassettes in vacuum cleaner appliances are complicated, time-consuming, and often result in improper sealing due to the difficulty in correctly positioning the filter cassette and its sealing element.
Innovation Solution
The filter cassette features first and second sealing elements arranged at an acute angle, allowing for easier insertion and optimal sealing by bearing against contact surfaces in the receptacle, facilitated by the cassette's dead weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single sealing element is used in the filter cassette, then the structure is simple, but the sealing reliability is insufficient and positioning is difficult
Solution Approach 1:
The sealing element is divided into two distinct sealing elements (first and second sealing elements) that are arranged at an acute angle to each other. This segmentation allows each sealing element to independently contact its respective contact surface, providing redundant sealing paths and ensuring reliable sealing even if one sealing element does not make perfect contact.
Solution Approach 2:
The two sealing elements are arranged in different spatial planes at an acute angle to each other, transitioning from a single-plane sealing approach to a multi-dimensional sealing configuration. This angular arrangement ensures that the sealing elements contact different areas of the receptacle, improving sealing reliability through spatial distribution.
2Force
If the filter cassette is positioned horizontally in the receptacle, then the installation is simple, but the sealing contact pressure is insufficient
Solution Approach 1:
The filter cassette is designed to be inserted at an asymmetric acute angle rather than horizontally. This asymmetric insertion angle causes the sealing elements to contact the receptacle surfaces at optimized angles, generating sufficient contact pressure for reliable sealing while maintaining relatively simple installation procedures.
Solution Approach 2:
The insertion angle parameter is changed from the conventional horizontal (0 degrees) to an acute angle. This parameter change optimizes the contact pressure between the sealing elements and the receptacle surfaces, ensuring adequate sealing force while keeping the installation process straightforward.
3Manufacturing precision
If the sealing element is positioned manually, then the positioning precision depends on operator skill, but the installation time is reduced
Solution Approach 1:
The filter cassette structure itself provides the positioning function through its geometric design. The acute angle arrangement of the sealing elements and their corresponding contact surfaces in the receptacle create a self-aligning mechanism that automatically positions the sealing elements correctly during insertion, eliminating the need for manual positioning adjustments.
Solution Approach 2:
The sealing elements are pre-positioned at an acute angle in the filter cassette during manufacturing. This preliminary positioning ensures that when the filter cassette is inserted into the receptacle, the sealing elements are already in the correct spatial configuration to contact the sealing surfaces, guaranteeing positioning precision without requiring operator skill.
Data Source
AI summary
A filter cassette for a vacuum cleaner appliance positionable in the vacuum cleaner appliance in an airflow drawn in by the vacuum cleaner appliance, wherein the filter cassette contains substantially a lateral surface, an upper opening, and a lower opening, such that the drawn-in airflow, in order to filter out dirt particles, can flow into the filter cassette through the lower opening and out of the filter cassette through the upper opening. A first sealing element extends in a first plane and the a second sealing element extends in a second plane, and wherein the first and second planes are arranged at an acute angle to one another, such that the second sealing element is oriented substantially horizontally when the filter cassette is positioned in a filter cassette receptacle accessible from outside the vacuum cleaner appliance. A vacuum cleaner appliance having a filter cassette receptacle for receiving a filter cassette. The filter cassette receptacle extends substantially in a center plane that is positioned at an acute angle to a parting plane.