Motor Protection Filter Frame With Integrated Seal for Easy Replacement
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Solution Overview
Problem
Existing motor protection filters in vacuum cleaners are difficult to replace and maintain, with complex seal formation and handling issues leading to functional seal failures.
Innovation Solution
A motor protection filter with a frame made of elastic thermoplastic material and a filter cover featuring a circumferential groove for the frame's tongue, along with a supporting elastic framework and reinforcing seal elements, ensures easy replacement and effective sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a motor protection filter with separate seal components is used, then the sealing function is achieved, but the handling and replacement complexity increases
Solution Approach 1:
The patent combines the seal function directly into the filter element frame by integrating an elastic sealing lip around the peripheral frame. This merging of the seal component with the filter element eliminates separate seal parts, making the entire filter element a single replaceable unit that maintains reliable sealing while simplifying handling and replacement operations.
2Stability of the object's composition
If a rigid frame structure is used for the filter element, then the structural stability is improved, but the sealing capability deteriorates
Solution Approach 1:
The patent applies local quality by making only the sealing lip portion of the frame elastic while keeping the main frame structure rigid. The elastic sealing lip provides conforming sealing contact with the filter housing, while the rigid frame maintains structural stability and proper positioning of the filter element within the housing.
3Reliability
If multiple seal components are used to ensure sealing, then the sealing reliability is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple sealing functions into a single integrated elastic sealing lip that surrounds the peripheral frame. This continuous elastic seal replaces what would otherwise require multiple separate seal components, achieving reliable sealing while reducing the number of parts and simplifying the overall structure.
4Ease of operation
If the filter element is designed as a single integrated unit, then the replacement ease is improved, but the sealing reliability may deteriorate
Solution Approach 1:
The patent designs the filter element as a single integrated unit with differentiated local properties: a rigid frame portion for structural stability and positioning, and an elastic sealing lip portion for conforming sealing contact. This local differentiation within the integrated unit ensures both easy replacement as a single piece and reliable sealing through the elastic component.
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
Facilitates easy handling and replacement of the motor protection filter, maintaining a secure seal between the filter cover and housing, reducing the likelihood of seal failure during maintenance.
Implementation Method 1
the frame of the filter element consists of an elastic material to form a seal
Implementation Method 2
the elastic material for forming a seal is formed by a thermoplastic material
Data Source
Figure 1~2
Figure 3~4
AI summary
A motor protection filter for vacuum cleaners (1) provides that a filter element (8) can be fixed in a filter cover (6) to cover a filter housing and a frame (9) of the flat filter element (8) can be covered with an elastic thermoplastic material to form a seal exists. The filter cover (6) has a circumferential groove (15) for receiving a corresponding tongue (17) of the frame (9) of the filter element (8) for an exchangeable arrangement, with the outer side of the frame (9) serving as a sealing surface for the filter housing (2nd ) serves.