Blower Diffuser With Inclined Blades And Curved Walls
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Solution Overview
Problem
Existing blower diffusers do not efficiently manage airflow, leading to suboptimal performance in terms of airflow quantity and power consumption.
Innovation Solution
A diffuser design featuring a plate-shaped body with inclined diffusion blades and curved connecting walls, optimized with specific inclination and outlet angles to minimize flow resistance and enhance airflow diffusion, paired with an impeller and motor configuration for improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional diffuser designs are used, then the structure is simple, but the airflow efficiency is low and power consumption is high
Solution Approach 1:
The diffuser is divided into multiple diffusion blades (at least three) arranged around the impeller, with each blade having independent guide surfaces and curved connecting walls. This segmentation allows optimized airflow control in different zones, improving overall airflow efficiency while maintaining reasonable power consumption
Solution Approach 2:
Curved connecting walls are used to interconnect the guide surfaces of adjacent diffusion blades. These curved walls smoothly guide airflow from one blade to the next, reducing flow separation and turbulence, thereby improving airflow efficiency without significantly increasing power consumption
Solution Approach 3:
The guide surfaces are designed with specific inclination angles (15-30 degrees relative to the axial direction) and the diffuser body has a specific length-to-diameter ratio (0.5-1.5). These optimized parameters maximize airflow diffusion efficiency while controlling power consumption within acceptable ranges
2Productivity
If diffusion blades with large inclination angles are used, then airflow diffusion is enhanced, but flow resistance increases
Solution Approach 1:
The guide surfaces of the diffusion blades are inclined at specific angles (15-30 degrees) relative to the axial direction. This optimized angle range provides sufficient diffusion effect while minimizing flow resistance and energy loss, achieving a balance between airflow diffusion and energy efficiency
Solution Approach 2:
Curved connecting walls with optimized curvature radii are used to transition airflow between adjacent blades. The curved geometry reduces flow separation and turbulence compared to sharp angles, thereby reducing flow resistance while maintaining effective airflow diffusion
3Productivity
If multiple diffusion blades are added, then airflow distribution is improved, but device complexity increases
Solution Approach 1:
The diffuser is segmented into multiple identical or similar blades arranged symmetrically around the impeller. This modular approach improves airflow distribution through increased blade count while keeping each individual blade relatively simple in structure, thus limiting overall complexity increase
Solution Approach 2:
Adjacent diffusion blades are connected by curved connecting walls that serve dual purposes: structural support and airflow guidance. This merging of functions reduces the need for additional separate components, limiting complexity increase despite having multiple blades
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 diffuser design significantly enhances blower efficiency by ensuring smooth airflow and reducing power consumption, achieving effective airflow distribution and increased output.
Implementation Method 1
a plurality of diffusion blades disposed at an circumferential edge of the body, each of the diffusion blades comprises an inclined guide surface... the guide surface extending from the starting end to the terminating end along a circumferential path of the body
Implementation Method 2
each of the diffusion blades further comprises a curved connecting wall interconnecting an inner edge of the guide surface and the body, the curved connecting wall comprises a starting end connected with the starting end of the guide surface and a terminating end connected with the terminating end of the guide surface
Data Source
AI summary
A diffuser includes a body and diffusion blades disposed at a circumferential edge of the body. The body includes an air inlet side and an air outlet side. Each diffusion blade has an inclined guide surface. The guide surface has a starting end at the air inlet side of the body and a terminating end adjacent the air outlet side of the body. The guide surface extends from the starting end to the terminating end along a circumferential path and has a width gradually increasing from the starting ending to the terminating end. The diffuser further includes air outlets at the terminating ends of the guide surfaces. Each air outlet fluidly connects the terminating end of a corresponding one of the guide surfaces and the air outlet side of the body. A blower employing the diffuser is also provided.