Ventilation fan mounting assembly
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Solution Overview
Problem
The installation of objects like fans and light fixtures in structural members such as ceilings and walls is complex, requiring access to the back side and the use of fasteners and tools, making it difficult to mount without entering attics or crawl spaces and facilitating air and vapor movement effectively.
Innovation Solution
A ventilation fan mounting assembly with a housing that includes bendable tabs for secure attachment to structural members from the room side, allowing tool-free installation and effective air sealing, featuring a trim ring and cover system for aesthetic appeal and easy integration with ducting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional fastening methods are used to mount ventilation fans in structural members, then secure attachment is achieved, but installation complexity increases and tool-free installation is lost
Solution Approach 1:
The housing itself provides the fastening function through integrally formed tabs that are bent back to engage with the structural member, eliminating the need for separate fasteners and tools. The housing performs both structural support and mounting functions simultaneously.
Solution Approach 2:
The mounting tabs are integrally formed with the housing walls, combining the housing structure and mounting mechanism into a single unified component. This integration eliminates separate fastening elements and simplifies the installation process.
2Productivity
If access to the back side of structural members is required for installation, then proper fastening is enabled, but installation time and complexity increase
Solution Approach 1:
Instead of requiring access to the back side of the structural member for fastening, the mounting tabs are designed to be bent back from the front side, engaging with the structural member from the interior. This inverts the traditional installation approach.
Solution Approach 2:
The requirement for back-side access is extracted and eliminated from the installation process. The mounting mechanism is redesigned to function entirely from the front side, removing the constraint that necessitates attic or crawl space entry.
3Ease of operation
If fasteners and tools are used for mounting, then secure attachment is achieved, but tool-free installation capability is lost
Solution Approach 1:
The housing structure itself serves as the fastening mechanism through its integrally formed tabs, eliminating the need for external fasteners and tools. The structural integrity of the housing is directly utilized for mounting purposes.
Solution Approach 2:
The physical state of the tabs is changed from flat to bent through manual deformation, creating a mechanical interlock with the structural member. This parameter change (from flat to bent configuration) provides the fastening function without requiring tools.
4Reliability
If ventilation fans are installed with proper air sealing, then air and vapor evacuation effectiveness is improved, but installation complexity increases
Solution Approach 1:
The air sealing function is merged with the mounting tabs, which simultaneously provide both structural attachment and sealing. The tabs create both mechanical fastening and air-tight contact with the structural member in a single integrated action.
Solution Approach 2:
The thin wall material of the housing is utilized to create flexible mounting tabs that can be bent and conform to the structural member surface, providing both attachment and sealing through the deformation of the thin-walled structure.
Data Source
AI summary
An assembly for use in mounting an object in an opening in a structural member, the structural member having opposing first and second surfaces, the assembly including a housing that is sized and shaped to define an interior to house the object and that can be received within the opening in the structural member, a trim ring sized and shaped to fit within the interior of the housing and to bear against the second surface of the structural member, and a cover having a first panel sized and shaped to cover the trim ring, the cover having a connector that releasably connects the cover to the housing, the cover further including at least one standoff extending therefrom that is sized and shaped to bear against the trim ring to hold the trim ring in place.