Blower Fan Assembly Isolation for Vibration and Noise Reduction
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Solution Overview
Problem
Existing blowers generate significant vibration and noise during operation, which are transmitted to the user, and reducing these without compromising performance is a challenge.
Innovation Solution
The blower incorporates a fan and motor assembly isolated by Noise Vibration Harshness (NVH) materials within the air duct, and the motor housing, stator blades, and shroud are joined by vibrational welding, with NVH materials surrounding the fan assembly to absorb vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If power and performance level of the blower are reduced, then vibration and noise are reduced, but performance is compromised
Solution Approach 1:
The patent extracts the harmful vibration and noise from the blower system by introducing NVH materials that isolate and absorb these disturbances. The NVH material is positioned between the motor/fan assembly and the housing to capture vibrations at their source, allowing the blower to maintain full power and performance while preventing vibration transmission to the user.
Solution Approach 2:
The NVH material serves as an intermediary element between the motor/fan assembly and the blower housing. This intermediary absorbs and dampens mechanical vibrations and noise, acting as a buffer that allows the blower to operate at high performance levels without transmitting harmful vibrations to the user or structure.
2Object-affected harmful factors
If NVH materials are added to isolate vibration, then user comfort is improved, but device complexity increases
Solution Approach 1:
The NVH material is nested within the existing blower housing structure, specifically positioned between the motor/fan assembly and the housing. This nested approach allows vibration isolation without adding external components or significantly increasing overall device complexity, as the NVH material is integrated into the existing design space.
Solution Approach 2:
The NVH material functions as a flexible damping layer that can be applied as a thin film or coating within the housing. This approach provides effective vibration isolation without requiring thick or bulky materials, thereby minimizing the increase in device complexity and maintaining a compact blower 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
This design effectively reduces mechanical vibrations and noise generated by the blower, enhancing user comfort without sacrificing performance.
Implementation Method 1
at least one Noise Vibration Harshness (NVH) material within the air duct, the NVH material being configured to isolate mechanical vibration of the housing from the air duct
Implementation Method 2
At least one of the plurality of stator blades is joined to the motor housing and/or the shroud by vibrational welding
Data Source
AI summary
A blower and a method of manufacturing a motor assembly for a blower are provided. A blower includes a main body, an air duct extending between an air inlet and an air outlet, the air duct including air duct body; a motor disposed in the air duct body; and a fan disposed in the air duct body. The fan and the motor are disposed in a fan assembly housing. The blower further includes at least one Noise Vibration Harshness (NVH) material within the air duct, the NVH material being configured to isolate mechanical vibration of the housing from the air duct.