Air discharge device
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Solution Overview
Problem
Conventional air discharge devices face limitations in increasing the reaching distance of the working air flow due to strong air suction action caused by lateral vortices generated at the air outlet, which reduces the flow velocity and effectiveness of air distribution.
Innovation Solution
The air discharge device incorporates a vortex generation structure in the hole forming member, which creates an auxiliary vortex with different vortex characteristics than the lateral vortex, causing them to collide and suppress the development of the lateral vortex, thereby reducing air suction and increasing the reaching distance of the working air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If an auxiliary air outlet is provided around a main air outlet to form a support air flow, then the reaching distance of the air flow is increased, but the air suction action of the working air flow is not sufficiently suppressed
Solution Approach 1:
The invention converts the harmful lateral vortex into a beneficial auxiliary vortex by intentionally generating it through vortex generation structures (such as inclined plates or protrusions) at the air outlet. This auxiliary vortex with opposite rotation direction actively suppresses the harmful air suction action caused by the natural lateral vortex, thereby extending the reaching distance of the working air flow while controlling the harmful effect.
Solution Approach 2:
The invention changes the vortex characteristics by controlling the rotation direction and vortex axis direction of the auxiliary vortex through geometric parameters of the vortex generation structures. By adjusting the inclination angle, position, and shape of these structures, the auxiliary vortex parameters are optimized to maximize suppression of air suction action while maintaining extended reaching distance.
2Length of moving object
If the working air flow velocity is increased to extend reaching distance, then the air suction action intensifies due to stronger lateral vortex generation
Solution Approach 1:
The invention allows the working air flow velocity to be increased for extended reaching distance by converting the intensified lateral vortex (harmful effect) into a controlled auxiliary vortex (beneficial effect). The vortex generation structures transform the high-velocity induced lateral vortex into an opposing auxiliary vortex that suppresses air suction action, enabling velocity increase without proportional increase in 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 suppresses air suction and reduces flow velocity attenuation, allowing the working air flow to reach further distances while maintaining effective air distribution, particularly in vehicle interior air conditioning applications.
Implementation Method 1
a vortex generation structure configured to generate an auxiliary vortex having a vortex characteristic including a vortex rotation direction and a vortex axis direction
Data Source
AI summary
An air discharge device includes a duct that defines a flow passage through which a working air flow to be discharged passes, and a hole forming member defining an air discharge hole as an outlet of the working air flow. The hole forming member has a vortex generation structure configured to generate an auxiliary vortex having a vortex characteristic including a vortex rotation direction and a vortex axis direction. The vortex characteristic of the auxiliary vortex is different from that of a lateral vortex generated by the working air flow at a downstream side of the air discharge hole. The vortex generation structure is configured in the hole forming member so that the auxiliary vortex collides with the lateral vortex in a state where at least one of the vortex rotation direction and the vortex axial direction of the vortex characteristic is different from that of the lateral vortex.