Deflector Pipe with Concentric Guide Element to Reduce Pressure Loss
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Solution Overview
Problem
Existing deflection pieces for guiding exhaust or supply air suffer from significant pressure losses due to the simultaneous change in flow direction and cross-sectional shape, which reduces the volume flow efficiency.
Innovation Solution
A deflection piece design featuring a transition pipe section that converts a circular cross-section to a rectangular cross-section, combined with a pipe bend section having concentrically arranged partial circular arc-shaped inner surfaces and a guide element, allowing the flow direction to change without a straight section, thereby minimizing pressure losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the deflection piece changes cross-section from circular to rectangular at the same time as deflecting the flow direction, then the deflection piece can be installed in tight spaces with false ceilings, but pressure losses are significant and volume flow is reduced
Solution Approach 1:
The deflection piece is divided into two separate functional sections: a transition pipe section that changes the cross-section from circular to rectangular, and a pipe bend section that deflects the flow direction by 90 degrees. This segmentation allows each section to optimize its function independently, reducing overall pressure losses while maintaining installation adaptability.
2Ease of manufacture
If the pipe bend section has a straight section at its end facing the transition pipe section, then the manufacturing is simpler, but pressure losses increase significantly
Solution Approach 1:
The pipe bend section is designed with curved inner surfaces in the shape of partial arcs of circles that are concentric to each other, and the curved inner surfaces extend directly from the rectangular cross-section of the transition pipe section without a straight intermediate section. This curved design optimizes flow characteristics and reduces pressure losses.
3Ease of manufacture
If the guide element is not concentrically arranged with the curved inner surfaces, then the manufacturing is easier, but the flow guidance is less effective and pressure losses increase
Solution Approach 1:
The guide element is designed with surfaces that are concentrically arranged with the curved inner surfaces of the pipe bend section. This local geometric precision in the flow guidance area optimizes the flow characteristics and minimizes turbulence and pressure losses, while the overall design remains manufacturable.
Data Source
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AI summary
The present invention relates to a deflector (1) for guiding exhaust air or supply air, which causes a reduced pressure loss in the gas flow transported by the deflector. The deflection piece (1) has a transition pipe section (8) adjoining a first, essentially circular connection cross-section (4) with a first flow direction (2), which converts the circular first connection cross-section (4) into a rectangular cross-section (5), wherein the rectangular cross-section (5) of the transition pipe section (8) is equal to a second, essentially rectangular connection cross-section (5) with a second flow direction (3), and wherein the transition pipe section (8) extends in the first flow direction (2), and a Pipe bend section (9) with a constant rectangular cross-section, the pipe bend section (9) being designed in such a way that it deflects a gas flow from the first flow direction (2) into the second flow direction (3), which is approximately at a right angle to the first flow direction (2) encloses, wherein the pipe bend section (9) has two mutually opposite arcuate sections te inner surfaces (11, 12) and a part-circular guide element (10) extending between the curved inner surfaces (11, 12), and wherein the curved inner surfaces (11, 12) and the surfaces (14, 15) of the guide element (10) are concentric are arranged.