Compact Multiblade Fire Damper With Internal Drive and Smoke Sealing
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Solution Overview
Problem
Existing fire dampers are bulky and difficult to install, with mechanisms that increase their size and extend beyond construction barriers, and they lack efficient smoke tightness due to the location of drive mechanisms and sealing materials that lose integrity during fires.
Innovation Solution
A multiblade fire damper with pivotally mounted blades connected via angle bars and links, utilizing silicone and swelling seals for tightness, and a drive mechanism housed within the damper body to maintain compactness and ensure EIS 120 fire resistance, allowing for easy installation and replacement of blades without dismounting from construction barriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mechanisms such as caps, discs, bars, and rods are used to connect blades, then the blades can be connected and driven, but the size of the device increases and mechanisms extend beyond the damper body
Solution Approach 1:
The patent integrates the drive mechanism and blade connection components within the damper body itself, merging previously separate external mechanisms into the main structure. The bars and rods are positioned inside the damper body, combining the functions of blade connection and drive transmission without increasing external dimensions.
Solution Approach 2:
The connection mechanisms (bars, rods, angle bars) are nested within the damper body structure, with components arranged concentrically or in layered configurations inside the available internal space. This allows multiple functional elements to occupy the same spatial envelope without increasing the overall damper volume.
2Ease of operation
If the damper is designed to be compact and fit within construction barriers, then installation is simplified, but the drive mechanism and sealing components have limited space for placement
Solution Approach 1:
The patent utilizes three-dimensional space utilization within the compact damper body, arranging components in multiple dimensions rather than linear extensions. The drive mechanism and sealing components are positioned in vertical and lateral arrangements within the cross-sectional area, effectively using available volume without increasing external footprint.
Solution Approach 2:
The damper is designed as a modular assembly with segmented components that can be independently positioned and assembled. The blade connection mechanisms are divided into discrete segments (bars, rods, angle bars) that can be arranged in various configurations within the compact body, allowing flexible component placement in limited space.
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
The solution provides a compact, EIS 120-rated fire damper that maintains smoke tightness and fire resistance, enabling easy installation and blade replacement, while keeping the damper body and blades within the construction barrier outline, ensuring effective fire and smoke containment during fires.
Implementation Method 1
at least one spring is attached by its one end to the body of the damper, the other end of the spring being connected with one blade
Implementation Method 2
swelling sealings are used, which ensure the tightness of the structure during a fire when ordinary sealings lose their fireproof characteristics
Data Source
Figure 1~11
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Figure 9~10
AI summary
A fire damper comprising a body (4) consisting of a steel frame and at least two pivotally mounted blades (1) made of a fire protection material, the blades (1) and optionally the body (4) being provided with sealings (10) comprising seals, characterized in that each of the blades (1) is provided with two rotary axles (14) located in two respective bearings (5) placed on the opposite vertical sides of the body (4) of the damper, the blades (1) being connected to each other via angle bars (18) and by a link (6) enabling drive transmission between the successive blades (1), and in that at least one spring (3) is attached by its one end to the body (4) of the damper, the other end of the spring (3) being connected with one blade (1).