Parallel Dual-Fan Blower Layout for High Airflow With Lower Noise
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Solution Overview
Problem
Conventional blowers using large fan blades fail to meet the requirements of high wind speed and high air volume at high rotational speed, suffer from poor stability, and produce significant working noise.
Innovation Solution
A blower design featuring multiple motor fan blade assemblies with small fan blades, each driven by a high-speed motor, arranged in parallel within a housing, with independent air guide channels and a converging nozzle to manage airflow efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large fan blade is used to ensure wind force and air volume, then the air volume is improved, but the rotational speed stability deteriorates and dynamic balance requirements increase
Solution Approach 1:
The patent divides the single large fan blade into multiple smaller fan blades (first fan blade and second fan blade) driven by separate motors. This segmentation allows each smaller blade to rotate independently at optimized speeds, improving overall rotational stability while maintaining the required air volume through combined effect of multiple blades rather than one large blade.
2Quantity of substance
If a large fan blade is used to ensure wind force and air volume, then the air volume is improved, but the working noise increases
Solution Approach 1:
By segmenting the single large fan blade into multiple smaller fan blades, each blade operates at lower individual speeds and generates less noise. The collective effect of multiple smaller blades produces the required air volume while reducing overall noise levels compared to a single large blade operating at high speed.
Solution Approach 2:
The patent changes the operational parameters by using multiple motors driving multiple fan blades, allowing each blade to operate at optimized, lower speeds rather than one large blade operating at high speed. This parameter change reduces the noise generation while maintaining the required air volume through the combined effect of multiple blades.
3Device complexity
If a single motor and single fan blade combination is used, then the device complexity is reduced, but the ability to provide high wind speed and high air volume at high rotational speed deteriorates
Solution Approach 1:
The patent segments the single motor-fan blade assembly into multiple independent motor-fan blade assemblies. Each assembly can operate independently at optimized speeds, enabling the system to achieve high wind speed and high air volume capabilities that would be difficult to attain with a single assembly, while the modular structure keeps individual component complexity manageable.
Solution Approach 2:
The patent combines multiple motor-fan blade assemblies to achieve the desired performance. By merging the output of multiple assemblies, the system achieves high wind speed and air volume capabilities that exceed what a single assembly could provide, while each individual assembly remains relatively simple in design.
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 achieves reduced noise and improved stability while meeting high wind speed and air volume demands by allowing simultaneous operation of multiple motors and fan blades, adjusting airflow based on requirements.
Implementation Method 1
a motor 1223 driving a fan blade 1221 to rotate about an output axis 1224 of the motor 1223
Data Source
AI summary
A blower includes: a housing, having an air inlet end and an air outlet end; and a duct assembly disposed in the housing and located between the air inlet end and the air outlet end. The duct assembly includes an outer duct and a motor fan blade assembly disposed in the outer duct. The motor fan blade assembly includes a first motor fan blade assembly and a second motor fan blade assembly; the first motor fan blade assembly includes a first fan blade and a first motor that drives the first fan blade to rotate about a first output axis of the first motor; the second motor fan blade assembly includes a second fan blade and a second motor that drives the second fan blade to rotate about a second output axis of the second motor; and the first output axis is parallel to the second output axis.