Air Cleaner Filter Assembly Forward Engagement Guide
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Solution Overview
Problem
Conventional air cleaners require a larger housing opening to accommodate engaging projections on the filter frame, leading to increased housing size and design constraints.
Innovation Solution
The air cleaner design features a frame with engaging portions that project forward in the insertion direction, engaging with corresponding projections on the housing to guide the filter assembly into place without increasing the housing width, using a guiding structure that includes front and rear engaging portions to maintain proper orientation and prevent sealing surface contact during insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If engaging projections are provided on the side of the frame opposite to the sealing surface, then the filter assembly can be guided to the installation position, but the width of the opening must be increased, leading to increased housing size
Solution Approach 1:
The patent inverts the conventional arrangement by moving the engaging projections from the side of the frame opposite to the sealing surface to the sealing surface side. This inversion allows the engaging projections to be positioned closer to the sealing surface, enabling them to engage with guide surfaces that are closer to the opening, thereby reducing the required opening width while still providing effective guidance during filter assembly installation.
Solution Approach 2:
The patent utilizes the depth dimension of the frame by extending engaging projections forward from the sealing surface toward the opening. This dimensional extension allows the engaging projections to interact with guide surfaces at a different depth position, enabling guidance functionality without increasing the lateral width of the opening.
2Area of stationary object
If the diameter of the inlet is reduced to maintain housing size, then the housing width is constrained, but this increases design constraints
Solution Approach 1:
By inverting the position of engaging projections to the sealing surface side, the patent enables the use of smaller inlet diameters while maintaining adequate opening width for filter assembly installation. This resolves the conflict between housing size constraints and design flexibility by providing an alternative configuration that works with reduced dimensions.
Data Source
AI summary
An air cleaner includes a housing having an opening and a filter assembly. The filter assembly is installed in and removed from the housing through the opening. When the filter assembly is at an installation position, a sealing portion of a filter element is pressed against a sealing surface of the housing. The frame includes a frame body, which supports the filter element, and a front engaging portion, which projects further forward in the insertion direction than the frame body. The housing includes a projection, which is engaged with the front engaging portion during insertion of the filter assembly. The front engaging portion and the projection are engaged with each other to constitute a guiding structure that guides the filter assembly toward the installation position.