Filter Fan Detent Connection for Tool-Free Maintenance Access
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Solution Overview
Problem
The installation and maintenance of filter fans in housings, such as computer components, are laborious due to the need for tools and structural disassembly to exchange filter mats, which complicates the process and increases the risk of interrupting operations.
Innovation Solution
The design incorporates swivellable sheet elements or flexible tongue-shaped side wall sections that form a detent connection, allowing for tool-free and finger-operated locking and unlocking of the fan grid, enabling effortless access and exchange of filter mats without disassembling the entire unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screw connections are used to fix the filter fan, then the connection is secure, but the installation and maintenance become laborious and require tools
Solution Approach 1:
The filter fan assembly is segmented into a detachable fan grid portion and a base housing portion. The fan grid can be separated from the base housing to allow easy access to the filter mat for maintenance, while maintaining a secure connection when assembled. This segmentation enables tool-free removal and reattachment of the fan grid.
Solution Approach 2:
The connection between the fan grid and base housing transitions from a static screw-fixed state to a dynamic snap-fit state. The detent connection allows the fan grid to be easily snapped into place during assembly and easily removed during maintenance, providing both security and ease of operation without requiring tools.
2Ease of operation
If the entire fan grid is removed to exchange the filter mat, then the filter mat is accessible, but the process becomes complex and time-consuming
Solution Approach 1:
The filter mat is segmented from the base housing by providing a detachable fan grid that can be removed as a separate unit. This allows the filter mat to be accessed by simply removing the fan grid portion, rather than disassembling the entire device, significantly reducing maintenance time and complexity.
3Ease of operation
If a separate maintenance opening is added to access the filter mat, then the filter mat is accessible during operation, but the device complexity increases
Solution Approach 1:
The fan grid serves multiple functions: it acts as the front cover of the device, provides structural support, and serves as the maintenance access mechanism. By making the fan grid detachable, it enables filter mat replacement without requiring a separate maintenance opening, thus avoiding increased device complexity while maintaining ease of operation.
Data Source
AI summary
An air passage device for installation into a mounting opening in a wall of a housing for components generating waste heat, such as a switching box, has a base housing with a fan support for a fan and a design cover with a fan grid having sheet elements. At least one swivellable sheet element or at least one flexible, tongue-shaped side wall section, separated from the remaining side wall surface of the side walls of the design cover by slits running transversely to the longitudinal direction of the side wall, is formed in the region of the upper side wall of the design cover facing away from the swivel axis for swivelling the design cover. The sheet element and the tongue-shaped side wall section are constructed as a detachable and lockable detent connection, able to be actuated by a finger, between the design cover and the base housing.