Ceiling diffuser for ventilating rooms
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Solution Overview
Problem
Existing twist diffusers often fail to achieve sufficient twisting effect, resulting in inadequate air induction in ventilated rooms due to the flat and planar design of air guiding elements, which leads to a flatter spray pattern and reduced induction efficiency.
Innovation Solution
The air guiding elements are curved both in the direction of flow and their longitudinal extent, with varying angles of attack from the outer edge to the center, creating a more resistance-free, low-loss, and low-turbulence swirl, giving a whirlpool or spiral appearance, and are designed to be more aerodynamically favorable with rounded edges and potentially made from plastic via injection molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If air guide elements are designed as flat and planar swirl vanes, then the structure is simple and easy to manufacture, but the twisting effect is insufficient and induction is inadequate
Solution Approach 1:
The air guide elements are designed with curved contours both in the direction of flow and in their longitudinal extent, giving the diffuser face a whirlpool or spiral appearance. This curvature creates a more effective twisting effect and induces room air more efficiently compared to flat planar designs
Solution Approach 2:
The invention transitions from flat two-dimensional air guide elements to three-dimensional curved elements that extend longitudinally. The air guide elements are curved when viewed in their longitudinal extent, adding a new dimension to the swirl generation mechanism and significantly improving the twisting effect
2Reliability
If air guide elements are curved in direction of flow and longitudinal extent, then the twisting effect and induction are enhanced, but the manufacturing complexity increases
Solution Approach 1:
The air guide elements are designed as integral parts of the front diffuser, made in one piece through injection molding. This merging of components simplifies manufacturing despite the complex curved geometry, eliminating the need for separate assembly steps
Solution Approach 2:
The invention utilizes varying angles of attack along the length of each air guide element, with the angle increasing from the outer edge toward the center. This parameter variation optimizes the twisting effect while the injection molding process efficiently produces these complex geometries
3Shape
If all velocity components point in the same direction at the center end, then the spray pattern is flatter, but the induction and speed reduction are reduced
Solution Approach 1:
The air guide elements are designed with asymmetric curved contours where the angle of attack varies along the length of each element. This asymmetry creates a more three-dimensional swirl pattern with velocity components in different directions, enhancing induction efficiency while maintaining a controlled spray pattern
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
This design enhances the twisting effect, achieving a higher induction and reduced speed at a shorter distance with a more efficient and turbulent-free swirl, resulting in improved air distribution and induction within the room.
Implementation Method 1
each air guiding element being curved as viewed in the direction of flow... giving the diffuser face a whirlpool or spiral appearance when viewed from above
Implementation Method 2
With swirl outlets, the air is introduced into the room to be ventilated with a swirl... Here, room air is induced
Data Source
Figure 1
Figure 2~4
AI summary
The diffuser has through-openings (5) provided in a diffuser face (1) that is made of plastic. Curve-shaped air guiding elements (6) are arranged in a flow direction, where a mean blade angle of the elements is of different sizes along a longitudinal extension of the elements. The blade angle lies between a plane of the diffuser face and a straight line. The straight line runs between upstream and downstream side edges of the elements. Width of the through-openings is smaller than a projection of the elements associated with the through-openings.