Air guide box and internal-circulation range hood having the same
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Solution Overview
Problem
Internal-circulation range hoods suffer from vortex formation and high noise levels due to inefficient air guidance and lack of noise reduction designs, leading to uncomfortable cooking experiences and interference with cooking processes.
Innovation Solution
An air guide box with a hexahedron box body featuring guiding slopes and angled grilles at the air outlets, which directs airflow smoothly and reduces noise by increasing the transmission path of sound waves and collisions with holes, preventing vortex formation and noise production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple barrier structure is used for air outlet, then the device complexity is reduced, but vortex formation occurs and air flow guidance is poor
Solution Approach 1:
The air outlet structure uses curved guiding slopes instead of simple flat barriers. The guiding slopes are formed by inclining the second wall from the largest recessed position toward the air outlets, creating a curved surface that smoothly guides air flow and prevents vortex formation while maintaining relatively simple device complexity.
2Productivity
If air is directly discharged from the air outlet, then the air discharge efficiency is improved, but noise level increases due to lack of noise reduction design
Solution Approach 1:
The patent introduces grilles as an intermediary component between the air outlet and the external environment. The grilles with multiple holes serve as a mediator that reduces noise by increasing the transmission path of sound waves and creating collisions, while still allowing efficient air discharge through the structured openings.
3Quantity of substance
If air flow is discharged upward without guidance, then the air discharge volume is maximized, but the air flow directly blows to the ceiling and forms rebound backflow
Solution Approach 1:
The guiding slopes on the second wall create a curved flow path that redirects air flow from direct upward movement to a more controlled trajectory. The inclination of the second wall from the largest recessed position toward the air outlets guides the air flow smoothly, preventing direct rebound off the ceiling while maintaining high air discharge volume.
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 air guide box effectively guides airflow without vortices and reduces overall noise levels, improving user experience and cooking conditions by minimizing mechanical and vortex noise.
Implementation Method 1
the second wall is gradually inclined in a direction away from the first wall, so that an inner surface of the second wall facing the first wall forms guiding slopes respectively from the largest recessed position to the edges of the first wall and the second wall
Implementation Method 2
reduces noise by increasing the transmission path of sound waves and collisions with holes
Data Source
AI summary
An air guide box includes a box body. The box body includes a first wall and a second wall disposed opposite to each other. The first wall has an air inlet. Air outlets are respectively disposed between corresponding edges of the first and second walls. The second wall is recessed toward the first wall, and a portion of the second wall corresponding to the air inlet is a largest recessed position. From the largest recessed position to the air outlets, the second wall is gradually inclined in a direction away from the first wall, so that an inner surface of the second wall facing the first wall forms guiding slopes respectively form the largest recessed position to the edges of the first and second walls.