Vehicle Air Vent Wing Structure for Quiet Air Shutoff
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Solution Overview
Problem
Conventional air vent devices for vehicles suffer from air leakage and whistle noise due to gaps between wing members when closing, and noise from collisions during rotation.
Innovation Solution
The air vent design incorporates a gap structure with an inflow path, curved flow path, and discharge flow path to minimize air inflow and reduce pressure, featuring protrusion and flange portions to guide air flow and prevent contact between wing members, along with a support and sealing portion to maintain the gap and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wing members are closed to block air discharge, then air leakage is reduced, but whistle noise is generated due to air flowing through gaps
Solution Approach 1:
The patent applies curvature by forming the flow path through the gap between wing members in a curved manner rather than a straight line. The curved flow path causes air to change direction as it passes through the gap, reducing the flow rate and minimizing whistle noise generation while still allowing the gap to function for air blocking when needed
2Reliability
If wing members are closed to block air discharge, then air leakage is reduced, but collision noise occurs between wing members
Solution Approach 1:
The patent implements beforehand cushioning by providing a support portion that maintains a predetermined gap between adjacent wing members before they can collide. This support structure prevents direct contact between the wing members during rotation, eliminating collision noise while preserving the air blocking function when the vent is closed
3Reliability
If gap between wing members is reduced to prevent air leakage, then sealing is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces an intermediary element - the support portion - that mediates the relationship between adjacent wing members. Instead of relying on precise manufacturing to maintain small gaps, the support portion actively maintains the predetermined gap, compensating for manufacturing variations and making the system less sensitive to manufacturing precision requirements while still achieving effective air sealing
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 minimizes air inflow, reduces whistle noise, and prevents noise from wing member collisions, ensuring quiet operation when closing the air flow path.
Implementation Method 1
a curved flow path connected to the inflow path and formed curvedly to protrude in the flow direction of the air flowing in the flow path
Data Source
AI summary
Provided is an air vent for a vehicle, the air vent including a housing having formed therein a flow path in which air flows and a plurality of wing members rotatably engaged to the housing to open and close the flow path and having a gap formed to prevent the plurality of wing members to contact one another when the plurality of wing members rotate in a direction to close the flow path. With such a structure, when the wing member closes a flow path for discharging conditioned air to the interior of the vehicle, the flow path in which the air flows between the wing members through the gap may be changed, thereby minimizing inflow of the air.