Three-Channel Windless Air Outlet With Trapezoidal Diffusion Chamber
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Solution Overview
Problem
Existing vehicle air outlets lack the ability to seamlessly switch between conventional wind, windless wind, diverse wind modes, and a windless mode with low pressure, which can lead to inconsistent cabin temperature under varying power conditions.
Innovation Solution
A three-channel windless air outlet design featuring a housing with an air inlet duct, upper, middle, and lower air ducts, and an air drainage duct with a trapezoidal cross-sectional air guide chamber, which diffuses wind from the center to both sides, reducing pressure drop and ensuring constant cabin temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single-channel air outlet is used, then the structure is simple, but the ability to switch between different wind modes (conventional wind, windless wind, diverse wind modes) is limited
Solution Approach 1:
The air outlet is divided into three independent air ducts (upper, middle, lower) that can operate independently or in combination. Each duct can be controlled separately to provide different wind modes, enabling the system to switch between conventional wind, windless wind, and diverse wind modes while maintaining a relatively simple overall structure.
Solution Approach 2:
The air outlet incorporates adjustable air guide plates that can rotate to change the direction and distribution of airflow. This dynamic adjustment capability allows the same hardware structure to provide multiple wind modes by changing the orientation of the guide plates, enhancing adaptability without adding complex separate systems.
2Object-affected harmful factors
If air is blown directly into the cabin, then the air outlet structure is simple, but direct wind blowing on occupants causes discomfort
Solution Approach 1:
The air outlet incorporates windless boards with specific aperture distributions in different regions. The board has different aperture sizes and densities in various areas to create localized airflow patterns that diffuse the air gently. This local quality variation allows the air to be treated differently at different positions, reducing direct wind discomfort while maintaining a relatively simple overall structure.
3Object-generated harmful factors
If the air guide chamber has a uniform cross-section, then the manufacturing is simple, but the wind diffusion effect is insufficient and pressure drop is high
Solution Approach 1:
The air guide chamber employs a trapezoidal cross-section instead of a uniform rectangular shape. This asymmetric geometry creates varying flow paths with different lengths and resistances, promoting better wind diffusion from the center to the sides. The asymmetric shape also reduces pressure drop by creating more gradual flow transitions, while still being manufacturable using standard molding techniques.
4Adaptability or versatility
If the air ducts are integrated into a single channel, then the structure is compact, but the ability to provide diverse wind modes is limited
Solution Approach 1:
The air outlet system is segmented into three separate air ducts (upper, middle, lower) that are positioned vertically one above the other. This segmentation allows each duct to be controlled independently for different wind modes while maintaining a compact vertical arrangement that minimizes the overall volume occupied by the air outlet system.
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
The solution provides a compact, efficient air outlet system that can switch between various modes, ensuring a constant and comfortable cabin temperature by effectively diffusing air and reducing pressure drop, even under constant power conditions.
Implementation Method 1
The cross-section of the air guide chamber in the first direction can be trapezoidal, and the area gradually increases in the second direction, so that the wind gradually diffuses from the center to both sides during flow from the inlet to the outlet in the air guide chamber
Data Source
AI summary
A three-channel windless air outlet incudes a housing including a plurality of ducts; an installation space connected to a middle air duct in the housing; and an air drainage duct located at the installation space and including an air guide chamber and a windless board covering the air guide chamber; wherein a cross-section of the air guide chamber in a first direction is trapezoidal such that an area increases in a second direction so that wind diffuses from a center to both sides during flow from an inlet to an outlet in the air guide chamber.