Ventilation element comprising one or more rotatable damper blades
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Solution Overview
Problem
Existing ventilation elements with rotatable damper blades face challenges in smooth and reliable rotation, often requiring complex drive mechanisms with metal bolts that compromise fire safety and are laborious to produce, especially when multiple blades need to rotate simultaneously.
Innovation Solution
A ventilation element design featuring a hexahedron base part with a rotatable axle and a locking mechanism that allows for smooth and reliable rotation of damper blades without the need for bolts or nuts, using a clamping pin and recesses to transmit rotation, and incorporating fire-resistant materials for safety and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex drive mechanisms with metal bolts and nuts are used to ensure smooth rotation of damper blades, then the rotation reliability is improved, but the fire safety is compromised and manufacturing complexity increases
Solution Approach 1:
The patent removes metal bolts and nuts from the damper blade assembly, extracting the harmful metallic components that compromise fire safety. The rotation mechanism is achieved without any metal fasteners, using only the axial displacement of the rod element to rotate the damper blades.
Solution Approach 2:
The rotation mechanism is divided into separate functional elements: the rod element that provides axial displacement, the damper blades that rotate independently, and the geometric coupling between them. This segmentation allows each component to be optimized for its specific function without requiring metal fasteners.
2Reliability
If complex drive mechanisms with transmissions are used to rotate multiple damper blades simultaneously, then the simultaneous rotation is achieved, but the device complexity and manufacturing labor increase
Solution Approach 1:
Multiple damper blades are connected to a common rod element, merging their rotation functions into a single actuation mechanism. When the rod element moves axially, all connected damper blades rotate simultaneously without requiring separate transmissions or complex drive mechanisms for each blade.
Solution Approach 2:
The rod element serves multiple functions: it provides the driving force for rotation, ensures simultaneous movement of all damper blades, and acts as a synchronization mechanism. This multi-functional design eliminates the need for separate transmissions and reduces overall device complexity.
3Strength
If metal bolts extending perpendicularly through leaf parts are used to fasten damper blades, then the structural strength is improved, but the fire safety is compromised and production labor increases
Solution Approach 1:
Metal bolts are completely removed from the structure. The damper blades are attached to the rod element without any metal fasteners, using a design that relies on geometric coupling and axial displacement rather than perpendicular bolting, thereby eliminating fire safety hazards while maintaining structural integrity.
Solution Approach 2:
The attachment mechanism changes from perpendicular bolting to axial coupling. The rod element moves along its axis to rotate the damper blades, changing the direction and nature of the mechanical coupling from radial (bolts perpendicular to surfaces) to axial (rod moving parallel to its length), which eliminates the need for metal fasteners.
Data Source
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AI summary
Ventilation element (1) with one or more rotatable damper blades (3), wherein, for each said damper blade (3), the ventilation element (1) comprises an axle (8) and wherein this axle (8) comprises a passage which extends essentially at right angles to the longitudinal direction of the axle (8), and, for each damper blade (3), the ventilation element (1) comprises a locking means (9) which is form-fitted with the passage and is configured to extend through the passage of the axle (8) in such a way that the locking means (9) extends on either side of the axle (8), and wherein each damper blade (3) comprises a recess (10), wherein this recess (10) comprises a first part and a second part which extends along the axis of rotation (A) and opens in the first part, and wherein, in use, the locking means (9) extends in the first part of the recess (10) and portions of the axle (8) extend in the first and the second part of the recess (10), respectively.