Garden Blower Duct Assembly for Sealing and Vibration Isolation
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Solution Overview
Problem
Existing garden blowers suffer from poor sealing at the duct outlet, leading to increased vibration and noise due to airflow leakage, with existing noise reduction and vibration reduction measures being insufficient.
Innovation Solution
A garden blower design featuring a duct assembly with an outer duct and motor fan blade assembly, maintained at a safe distance from the housing casing with anti-vibration components, forming non-contact intervals and anti-vibration planes to suppress vibration transmission, and incorporating a negative pressure inlet for heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the duct is hard-connected to the housing at the outlet position, then the sealing of the blower is improved, but the vibration of the blower increases causing noise and discomfort
Solution Approach 1:
The patent introduces an anti-vibration component as an intermediary element between the duct and the housing. This component acts as a mediator that maintains the connection while absorbing vibrations, thus preventing vibration transmission to the housing while preserving the sealing function. The anti-vibration component specifically targets the harmful vibrations generated by the motor fan blade assembly without compromising the duct-housing seal.
Solution Approach 2:
The patent changes the physical parameters of the connection between duct and housing by introducing materials with specific vibration-absorbing properties. The anti-vibration component is made of materials that can dampen vibrations while maintaining structural integrity and sealing. This parameter change allows the system to maintain sealing effectiveness while reducing vibration transmission to the housing.
2Object-generated harmful factors
If the outer duct and rear casing are set at a safe distance to maintain non-contact state, then vibration superposition is prevented, but the sealing at the duct outlet is compromised
Solution Approach 1:
The patent segments the housing into distinct components (rear casing and holding casing) with the duct positioned between them. The outer duct is maintained at a safe distance from the rear casing to prevent vibration superposition, while the anti-vibration component ensures proper sealing. This segmentation allows independent optimization of vibration control and sealing functions.
Solution Approach 2:
The anti-vibration component serves as an intermediary that bridges the gap between the duct and housing while maintaining sealing. It allows the outer duct to remain at a safe distance from the rear casing for vibration control, yet still achieves effective sealing through the intermediary component positioned between the duct outlet and housing.
3Object-generated harmful factors
If the first anti-vibration component is positioned close to the motor fan blade assembly, then vibration from the motor is effectively suppressed, but the structural complexity of the duct assembly increases
Solution Approach 1:
The patent merges the anti-vibration component with the duct assembly structure, integrating vibration suppression functionality into the existing duct design. The first anti-vibration component is incorporated as part of the duct-housing connection structure, eliminating the need for separate vibration suppression mechanisms and reducing overall structural complexity while maintaining effective motor vibration suppression.
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
Effectively reduces vibration and noise by preventing vibration superposition and allowing heat dissipation, enhancing user comfort and operational efficiency.
Implementation Method 1
a first anti-vibration component is provided between the outer duct and a holding casing of the housing, so that the outer duct and the holding casing are spaced apart by the first anti-vibration component to maintain a state of non-direct contact
Implementation Method 2
the outer duct and the rear casing are arranged in such a way that there is an annular interval therebetween, and the outer duct and the rear casing are deliberately set at a safe distance from each other so as to maintain an absolute non-contact state, forming a negative pressure inlet
Data Source
AI summary
The present disclosure provides a garden blower, including a housing and a duct assembly, the duct assembly includes an outer duct, a motor fan blade assembly and a guide cone; the outer duct and the rear casing are arranged in such a way that there is an annular interval therebetween, and a plurality of first anti-vibration components are arranged between the outer duct and the holding casing; the first anti-vibration components are close to the motor fan blade assembly, and form a first anti-vibration plane perpendicular to the motor axis of the motor fan blade assembly. This technical solution can suppress the transmission of vibration generated by the rotation of the motor fan blade assembly to other components, especially the holding casing, and effectively avoids the mutual influence between the vibration of the motor fan blade assembly and the disturbance of the rear casing caused by the airflow.