Ventilating Fan Filter Mounting to Prevent Dislodgment
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Solution Overview
Problem
Conventional ventilating fans have a filtering member that is prone to being dislodged during maintenance, potentially remounted in reverse order, leading to reduced service life due to its fixed mounting between the hood and body.
Innovation Solution
A ventilating fan design with a filtering member featuring a frame with a protruding sheet and resilient fixing section that engages with the ventilating fan body without screws, ensuring stable mounting and preventing reverse installation, utilizing a resilient fixing mechanism and nonskid handle for easy detachment and reattachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the filtering member is fixedly mounted by being sandwiched between the ventilating fan hood and the ventilating fan body, then the filtering member can be easily installed, but it is likely to be blown off and fall off when the ventilating fan hood is removed for maintenance
Solution Approach 1:
The filtering member is divided into a frame portion and a filtering screen portion that can be separated. The frame portion engages with the ventilating fan body through protrusions and recesses, while the filtering screen is held within the frame, allowing the filtering member to be installed as a complete unit yet maintained by removing only the hood.
Solution Approach 2:
The frame portion has an asymmetric engagement structure with protrusions at specific locations that mate with corresponding recesses in the ventilating fan body. This asymmetric design prevents the filtering member from being accidentally dislodged while allowing intentional removal for maintenance.
2Ease of manufacture
If the filtering member is fixedly mounted between the hood and body, then installation is simple, but it may be remounted in reverse order reducing service life
Solution Approach 1:
The engagement structure features asymmetric protrusions and recesses that only fit together in the correct orientation. The frame portion has protrusions that engage with specifically shaped recesses in the ventilating fan body, making reverse installation mechanically impossible and ensuring the filtering member is always mounted correctly to maintain its service life.
3Device complexity
If the filtering member is sandwiched between hood and body, then no additional fasteners are needed, but the filtering member cannot be securely retained during hood removal
Solution Approach 1:
The frame portion and filtering screen are merged into a single integrated filtering member assembly. The frame serves both as the structural support and as the mounting interface that engages with the ventilating fan body, eliminating the need for separate fasteners while securing the filtering screen within the frame.
Solution Approach 2:
The engagement structure uses asymmetric protrusions and recesses that provide secure retention of the filtering member during normal operation including hood removal, while still allowing intentional removal for maintenance when needed.
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 secure and efficient mounting of the filtering member without fasteners, preventing dislodgment during hood removal and ensuring correct reinstallation, thereby extending the service life and simplifying maintenance.
Implementation Method 1
a resilient fixing section, provided at the opposite other side of the frame of the filtering member, formed by extending the frame of the filtering member in a vertical direction, and, the resilient fixing section comprising a hook portion and a resilient portion
Data Source
AI summary
The present invention discloses a ventilating fan mounted on a wall of an indoor side of a wind path therethrough from the indoor side to an outdoor side. The ventilating fan includes a ventilating fan hood, a filtering member, a ventilating fan body, and a ventilating fan mounting member. The filtering member is integrally formed by a frame provided with an engagement that is engaged with the ventilating fan body and a filtering screen located within the frame. The ventilating fan according to the present invention has the advantages that the filtering member can be fixedly mounted to the ventilating fan body in a simple structure manner without using fasteners such as screws, so as to facilitate the operation and save the working time. Moreover, the filtering member is not blown off to fall off when the ventilating fan hood is removed. In addition, the mounting of the filtering member in a reverse order is eliminated.