Combined Blade Device Airflow Convergence
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Solution Overview
Problem
Traditional high-air-pressure and high-speed fans, such as diagonal flow fans, have invalid air inlet areas that reduce air inlet volumes and cause turbulence, affecting air pressures and outlet volumes.
Innovation Solution
A combined blade device with a hub featuring a centrifugal cavity, diagonal flow blades, and centrifugal blades, where the air inlet areas are optimized to increase air volume and pressure by utilizing the air inlet areas more efficiently and guiding airflow to converge after discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air inlet is only provided outside the hub, then the structure is simple, but the air inlet area is reduced and turbulence occurs
Solution Approach 1:
The air inlet is segmented into two distinct parts: a first air inlet outside the hub and a second air inlet at the air inlet side of the hub. This segmentation allows each inlet to serve specific functions, increasing the total air inlet volume while maintaining structured organization
Solution Approach 2:
The second air inlet is nested within the hub structure at the air inlet side, while the first air inlet surrounds it externally. This nested arrangement maximizes the utilization of the hub's air inlet area without compromising structural simplicity
2Device complexity
If only diagonal flow blades are used, then the structure is simple, but the air pressure and air outlet volume are affected due to turbulence
Solution Approach 1:
The invention merges two different blade types: diagonal flow blades connected to the hub exterior and centrifugal blades located within the centrifugal cavity. This combination allows the device to leverage the air-moving capability of diagonal flow blades while using centrifugal blades to generate pressure and reduce turbulence in the centrifugal cavity
Solution Approach 2:
Different blade types are assigned to different locations: diagonal flow blades are positioned where they best move air, while centrifugal blades are positioned within the centrifugal cavity where they best generate pressure and manage airflow patterns, optimizing local airflow quality
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 combined blade device enhances air volume and pressure by fully utilizing air inlet areas and guiding airflows to converge, improving the efficiency and performance of the air outlet device.
Implementation Method 1
a hub, where a first air inlet is formed outside an edge of a first end of the hub, and a first air outlet is formed outside an edge of a second end of the hub, the hub is internally provided with a centrifugal cavity
Implementation Method 2
the diagonal flow blade and centrifugal blade can form two the airflows respectively, and the two airflows converge after being discharged from the respective air outlets, to effectively increase the air volume and air pressure of the air outlet device
Data Source
AI summary
Disclosed are a combined blade device and a combined air outlet device. The combined blade device includes a hub, diagonal flow blades, and centrifugal blades, where a first air inlet is formed outside an edge of a first end of the hub, and a first air outlet is formed outside an edge of a second end of the hub, the hub is internally provided with a centrifugal cavity, the first end of the hub is provided with a second air inlet, the first air inlet surrounds the second air inlet, the second end of the hub is provided with a second air outlet, both the second air inlet and the second air outlet are communicated with the centrifugal cavity, and the hub expands gradually in a direction from the second air inlet to the second air outlet.