Fan Wheel Equal Cross-Section Channels Reduce Noise
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Solution Overview
Problem
Existing fan assemblies used in aviation for heating, cooling, and ventilation are energy-consuming and noisy, with a need for improved efficiency and reduced noise levels.
Innovation Solution
A fan assembly design featuring a fan wheel with channels having equal cross-sectional areas at the inlet and outlet, achieved by varying the distances between the inner and outer peripheries, and curved wings that form channels with constant cross-sectional areas, reducing energy consumption and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional fan designs with varying channel cross-sectional areas are used, then the fan can move air, but energy consumption is high and efficiency is low
Solution Approach 1:
The patent applies parameter changes by maintaining a constant cross-sectional area of the channels throughout their length, from inlet to outlet. This geometric parameter optimization ensures uniform air velocity and pressure distribution, eliminating energy losses associated with abrupt area changes, thereby improving both energy efficiency and productivity simultaneously
2Object-affected harmful factors
If conventional fan designs are used, then air flow is generated, but noise levels are high
Solution Approach 1:
The patent changes the geometric parameters of the channel cross-sectional area to remain constant along the channel length. This design prevents turbulence and flow separation that occur in conventional designs with varying areas, thereby reducing noise generation while maintaining the required air flow speed
3Use of energy by moving object
If the distance between inner and outer peripheries is varied to create channels, then air can be moved, but energy efficiency decreases
Solution Approach 1:
The patent optimizes the spatial parameters by setting the distance between the inner periphery of the second side and the first side to be substantially constant throughout. This creates uniform channels that move air efficiently with minimal energy loss, while fully maintaining the air movement capability required for fan operation
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 design significantly increases efficiency and reduces noise levels, leading to lower energy consumption and improved working environments.
Implementation Method 1
fans comprise rotating wings acting on the air
Data Source
Figure 1~2a
Figure 2b~2c
Figure 2d
AI summary
The present specification relates to a fan assembly 1 comprising a fan wheel 100 rotatably arranged around an axis A in a fan duct 200. The fan wheel comprises a first side 130, a second side 140 comprising an inner periphery 141 forming a fan wheel inlet, and an outer periphery 142 and at least four curved wings 150. The at least four wings extend between the inner and outer periphery of the second side and between the first side and the second side, such that channels C are formed between the wings and the first and second side. The inner periphery of the second side is arranged at a first distance Hi from the second side and the outer periphery of the second side is arranged at a second distance Ho from the first side, such that the cross sectional area of the channels at the inlet and the cross sectional area of the channels at the outlet are substantially equal. The present specification further relates to a heater comprising such a fan assembly.