Damper door, and corresponding heating, ventilation and/or air conditioning installation
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Solution Overview
Problem
Current air flow shutters in HVAC systems face challenges in optimizing weight, size, and manufacturing costs while maintaining resistance to air pressure and torsional forces, often requiring complex designs and high production costs.
Innovation Solution
The design features a semi-elliptical rotation shaft with recesses and longitudinal ribs, allowing for a minimum thickness that reduces mass while maintaining equivalent resistance to torsional forces and air pressure, and includes radial and diagonal ribs for additional stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the damper thickness is reduced to optimize weight, then the mass decreases and energy consumption is reduced, but the structural strength and resistance to air pressure and torsional forces deteriorate
Solution Approach 1:
The damper blade is segmented into multiple hollow chambers separated by internal walls. This segmentation allows the structure to maintain strength through the distributed chamber framework while reducing overall material usage and weight compared to a solid blade of equivalent dimensions.
Solution Approach 2:
The damper blade employs curved and rounded geometric forms in its chamber configurations and edge transitions. These curved structures provide enhanced structural efficiency and torsional resistance while using less material than sharp-edged or flat designs, optimizing the strength-to-weight ratio.
2Strength
If reinforcing elements are added to improve rigidity, then the resistance to torsional forces improves, but the weight and manufacturing cost increase
Solution Approach 1:
Reinforcement is applied locally at critical stress points within the hollow chambers and at the blade root attachment area, rather than uniformly throughout the entire blade. This localized reinforcement provides necessary rigidity while minimizing additional material and weight.
Solution Approach 2:
The damper blade utilizes composite construction combining multiple materials with different properties - such as rigid materials for structural framework and lighter materials for chamber walls - to achieve optimal strength-to-weight ratio and torsional resistance without excessive weight gain.
3Strength
If complex reinforcing structures are implemented to enhance strength, then the resistance to air pressure improves, but the manufacturing cost and production complexity increase
Solution Approach 1:
The hollow chamber structure serves multiple functions simultaneously: it provides structural strength to resist air pressure, reduces weight compared to solid construction, and creates internal pathways for actuator mechanisms. This multi-functionality eliminates the need for separate reinforcement components, simplifying manufacturing.
Solution Approach 2:
Actuator mechanisms and control components are nested within the hollow chambers of the damper blade structure. This nesting eliminates the need for separate housings or mounting structures, reducing overall part count and manufacturing complexity while maintaining structural integrity.
Data Source
Figure 1A~1B
Figure 2A~2D
Figure 3A~3C
AI summary
The present invention relates to a damper door (1) having an axis of rotation (3), a first face (5), and a second face opposite the first face (5), said first (5) and second faces of the damper door (1) defining a plane, said damper door (1) comprising: • a rotation shaft (9) projecting from each side of the plane defined by the first (5) and second faces of the damper door (1), and • at least one side wall (11) having a flat surface arranged radially with respect to the rotation shaft (9), characterised in that the rotation shaft (9) has, in the plane of the at least one side wall (11), a semi-elliptical shape (13) extending over the side wall (11) and comprising a large diameter (Gl) coinciding with the axis of rotation (3) of the damper door (1) and a small radius (P1) parallel to the plane of the at least one side wall (11).