Air Outlet Blade Hollow Structure for Flow Separation Control
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Solution Overview
Problem
Air conditioner blades face issues with wind direction controllability due to flow separation during operation, and maintaining a superior design is crucial for installations in living and service spaces.
Innovation Solution
The air conditioner incorporates a main body with a rotatable first member featuring a recess on one surface and a protrusion on the opposing surface, forming a hollow structure that enhances wind direction control and design aesthetics by reducing separation and weight while maintaining strength and preventing dew condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional blade structure is used, then the design appearance is maintained, but flow separation occurs during operation reducing wind direction controllability
Solution Approach 1:
The blade is divided into multiple sections with different structural characteristics. The leading edge portion includes recesses and protrusions to control flow separation, while other portions maintain conventional structures. This segmentation allows optimization of specific regions for flow control without unnecessarily complicating the entire blade structure.
Solution Approach 2:
The blade structure is made non-uniform by providing recesses and protrusions only at the leading edge portion where flow separation is most critical. This local modification improves wind direction controllability at the critical flow separation zone while keeping the rest of the blade structure simple and easy to manufacture.
2Reliability
If the blade structure is modified to prevent flow separation, then wind direction controllability improves, but the design appearance may be compromised
Solution Approach 1:
The functional features (recesses and protrusions) are segmented and located only at the leading edge portion of the blade, which is the critical area for flow control. This segmentation allows the functional modification to be concentrated where needed while keeping the visible portions of the blade maintaining their design appearance.
Solution Approach 2:
The structural modifications for flow control are applied locally at the leading edge portion rather than across the entire blade surface. This localized approach ensures that the wind direction controllability is improved at the critical flow separation zone while the overall design appearance of the blade is preserved.
3Strength
If a solid blade structure is used, then structural strength is maintained, but weight is increased leading to vibration and noise
Solution Approach 1:
The blade employs a hollow internal structure with thin wall formations instead of a solid structure. This allows the blade to maintain sufficient structural strength for withstanding operational loads while significantly reducing weight, thereby minimizing vibration and noise during operation.
Solution Approach 2:
The blade structure is segmented into an outer shell and internal hollow space, creating a lightweight yet strong configuration. The recesses and protrusions at the leading edge are integrated into this hollow structure, maintaining strength where needed while reducing overall weight.
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 configuration achieves superior design and wind direction controllability while minimizing separation, reducing weight, and preventing vibration and noise, ensuring effective airflow and aesthetic appeal.
Implementation Method 1
a recess positioned on an opposite side to the protrusion, wherein the recess serves to prevent dew condensation
Data Source
AI summary
An air conditioner includes: a main body having an air outlet; a fan provided in the main body; a heat exchanger provided in the main body; and a first member rotatably supported on the main body and opening and closing the air outlet, wherein the first member includes a first casing having a first surface facing an inner side of the main body while operation is stopped and a second casing attached to the first casing; on the first casing, a recess is formed on the first surface and a protrusion protruding toward the second casing is formed, and the recess is positioned on an opposite side to the protrusion.