Vehicle Air Register Fins With Saw-Toothed Vortex Suppression
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Solution Overview
Problem
Existing register devices for vehicles generate abnormal noises due to large vortexes forming near peripheral walls, leading to rapid pressure changes when air flows through raised surfaces.
Innovation Solution
The register device incorporates saw-toothed notches and riblet portions on the raised surfaces of the peripheral walls to fragment air vortexes, reducing resistance and suppressing pressure variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If raised surfaces are formed in peripheral walls to close off air passage, then air flow can be stopped effectively, but large vortexes form near peripheral walls causing abnormal noises and pressure loss
Solution Approach 1:
The patent applies local quality by creating riblet portions only at specific locations where vortexes form near peripheral walls, rather than modifying the entire surface. These localized riblet structures have a specific orientation (aligned with flow direction) and dimensions that target the vortex formation zones, reducing abnormal noises and pressure loss while preserving the overall air passage closing function of the raised surfaces
Solution Approach 2:
The patent segments the peripheral wall surface into different functional zones: raised surfaces for air passage closure and riblet portions for vortex suppression. This segmentation allows each zone to perform its specific function optimally - the raised surfaces provide the closing mechanism while the riblet portions independently handle the vortex-related harmful effects
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 effectively reduces abnormal noises and pressure loss by constraining vortex separation and minimizing contact friction resistance.
Implementation Method 1
Saw-toothed notches are formed in an edge portion of the raised surface on a side of a central axis of the air passage
Data Source
AI summary
A register device includes a register body and fins. The register body includes peripheral walls and an inner portion surrounded by the peripheral walls. The fins are rotatably disposed in the inner portion surrounded by the peripheral walls. The inner portion serves as an air passage. The fins open and close the air passage. Raised surfaces are formed in an upper wall and a lower wall. The raised surfaces are abutted against extended portions of the fins when the fins are in a closing state. Saw-toothed notches are formed in edge portions of the raised surfaces on a side of a central axis of the air passage.