Toroidal Fan Blades for Blower Noise and Runtime
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Solution Overview
Problem
Existing blowers are inefficient in runtime and excessively loud, making them less desirable for outdoor use despite their portability.
Innovation Solution
A blower design featuring a toroidal fan assembly with blades that extend from a hub to both the hub and an adjacent blade, providing increased stiffness and reduced noise through a unique airflow generation mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If traditional fan blades are used, then the blower can move air, but the runtime is reduced and noise is excessive
Solution Approach 1:
The fan blades are designed with a toroidal (doughnut-shaped) cross-section featuring curved surfaces instead of traditional flat or straight profiles. This curvature optimizes airflow patterns, reduces turbulence, and minimizes noise generation while maintaining effective air movement, directly addressing the noise and runtime issues
2Ease of operation
If battery power is used for portability, then the blower is portable, but efficiency is reduced
Solution Approach 1:
The toroidal fan blade design changes the geometric parameters of the blades to optimize airflow efficiency. The specific curvature radius, blade angle, and cross-sectional shape are optimized to maximize air movement per unit of energy consumed, enabling battery-powered blowers to achieve higher efficiency and extended runtime while maintaining portability
3Device complexity
If traditional fan design is used, then the structure is simple, but airflow efficiency is reduced
Solution Approach 1:
The toroidal fan blades incorporate curved surfaces and a doughnut-shaped cross-section that optimize airflow patterns. This curvature design reduces turbulence and improves air movement efficiency compared to traditional straight or flat blades, enhancing productivity without significantly complicating the overall fan structure
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 toroidal fan design enhances airflow efficiency and reduces noise, resulting in improved debris removal performance and user experience.
Implementation Method 1
The fan assembly comprises a fan having a hub and a plurality of blades extending from the hub... Each blade has a root and a tip end. The root extends from the hub and the tip end extends to the hub or to an adjacent blade.
Data Source
AI summary
A blower having a fan with toroidal shaped blades is provided. The blower includes an air inlet, an air outlet, and a fan assembly disposed between the air inlet and the air outlet. The fan assembly comprises a fan having a hub and a plurality of blades extending from the hub. Each blade has a root and a tip end. The root extends from the hub and the tip end extends to the hub or to an adjacent blade.