Ventilation Fan Fire Damper Module with Wire Routing for Safe Closure
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Solution Overview
Problem
Ventilation fans with integrated fire dampers are inconvenient to maintain due to the need to disassemble the damper, and there are safety concerns when electrical wires pass through, potentially preventing the damper from closing during a fire.
Innovation Solution
A ventilation fan design that includes a fire damper module with an adjustment element and a cover module, allowing for easy installation and maintenance by routing electrical wires through a notch in the adjustment element, and featuring a link frame for detaching the fan body from the ceiling without uninstalling the entire unit, ensuring the fire damper can close effectively during a fire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fire damper is integrated into the ventilation fan, then fire safety is improved, but maintenance convenience deteriorates because the user needs to disassemble the fire damper first
Solution Approach 1:
The fire damper module is segmented from the main fan body as a separate removable unit. The damper module includes the fire damper blade, housing, and control components as an independent assembly that can be detached without disassembling the entire ventilation fan, enabling easy maintenance while maintaining fire safety functionality.
Solution Approach 2:
The fire damper control components are extracted and relocated to the cover module, separating them from the main fan housing. This allows the damper module to be removed and maintained independently, resolving the contradiction between integrated fire safety and maintenance accessibility.
2Ease of operation
If electrical wires pass through the fire damper, then power supply connection is simplified, but fire safety deteriorates because the damper cannot actually close during fire
Solution Approach 1:
A dedicated wire passage structure is introduced as an intermediary element within the damper module. This passage provides a controlled route for electrical wires to pass through the fire damper blade while maintaining the blade's ability to close completely, thus enabling power connection without compromising fire safety.
Solution Approach 2:
The fire damper blade is designed with localized features including the wire passage and flange with opening, which provide specific functional qualities in targeted areas. These local modifications allow wire penetration while preserving the overall fire-blocking capability of the damper structure.
3Ease of repair
If the entire ventilation fan is uninstalled from the ceiling for maintenance, then access to internal components is improved, but installation complexity increases
Solution Approach 1:
The ventilation fan is segmented into modular components including the fan body, damper module, and cover module that can be independently accessed and maintained. The link frame structure enables selective detachment of the fan body from the ceiling while leaving the damper module in place, simplifying both installation and maintenance procedures.
Data Source
AI summary
A ventilation fan according to the invention comprises a fan module, a fire damper module and a cover module. The fire damper module comprises a link frame, a fire damper body and an adjustment element. The fire damper body is disposed in the link frame and detachably linked up with the link frame. The adjustment element is disposed on the fire damper body and near an opening of a flange of the fire damper body. The adjustment element comprises a fixed portion, a stop portion and a trace portion. Wherein the stop portion abuts and shields the opening when no electrical wire passing through the opening. Wherein when the cover module comprises an electronic device having an electrical wire, the trace portion abuts the opening and the electrical wire passing through the trace portion and the opening to connect to the fan module.