Blender Noise Reduction Using Floating Mounts and Muffler Assembly
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Solution Overview
Problem
Conventional electric appliances, such as blenders, generate excessive noise due to motor noise, vibration, and airflow, making them inconvenient for use.
Innovation Solution
The design incorporates floating motor mounts, a muffler assembly with sound-absorbing material, a centrifugal fan for airflow management, and a double-walled mixing container with a soft elastomer coupling to minimize vibration and noise transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional motor mounting and cooling methods are used, then the motor can be simply installed and cooled, but excessive noise and vibration are generated
Solution Approach 1:
Floating motor mounts are introduced as intermediary elements between the motor and base assembly. These mounts include dampening materials that absorb vibrations and reduce noise transmission while maintaining motor stability and cooling efficiency
Solution Approach 2:
The motor is nested within a motor well in the base assembly, with floating mounts positioned between the motor and the well. This nested arrangement allows for compact integration while incorporating noise-reducing elements without increasing overall device footprint
2Object-affected harmful factors
If the motor is surrounded by a sealed compartment for sound absorption, then noise is reduced, but motor cooling becomes difficult
Solution Approach 1:
The motor well is designed with differentiated local properties: the walls are configured to absorb sound waves while specific regions provide airflow passages for cooling. This allows simultaneous achievement of noise reduction and thermal management by optimizing different zones of the same structure
Solution Approach 2:
The motor well serves multiple functions simultaneously: it acts as a sound-absorbing enclosure, provides a mounting structure for the motor, and incorporates airflow paths for cooling. This multi-functionality eliminates the need for separate noise control and cooling systems
3Power
If rigid coupling structures are used between motor and agitator, then power transfer is efficient, but vibration and noise are transmitted
Solution Approach 1:
The floating motor mounts incorporate composite construction with rigid portions for structural support and power transfer, combined with dampening materials for vibration absorption. This composite approach maintains efficient power transmission while reducing vibration and noise transmission to the base assembly
4Productivity
If high RPM agitator blades are used, then blending efficiency is improved, but impact noise increases
Solution Approach 1:
The design accepts high RPM operation for blending efficiency but converts the harmful vibration and impact noise into controlled dampening actions. The floating motor mounts and dampening materials absorb the vibrations generated by high-speed agitation, transforming the harmful mechanical energy into heat dissipation while maintaining blending performance
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
Significantly reduces noise levels by absorbing sound waves, minimizing vibration transfer, and optimizing airflow, resulting in a quieter operation.
Implementation Method 1
The muffler cavity includes sound dampening material for dampening the high pressure sound waves emanating from the motor
Implementation Method 2
Each floating mount includes an attachment mechanism that allows for some horizontal movement or floating of the motor relative to the base assembly but prevents vertical movement of the motor relative to the base assembly. The use of floating motor mounts helps to eliminate any vibration emitted by the motor and transferred to the base housing
Implementation Method 3
a centrifugal fan that is positioned within the base body for circulating airflow along a much longer airflow path wherein the airflow changes from axial flow over the motor to lateral flow through a 90° centrifugal fan
Data Source
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AI summary
An electric appliance designed with sound dampening features to reduce noise generated by the appliance including a base assembly having at least one floating mount for attaching to a motor, each floating mount allowing for horizontal movement of the motor but preventing vertical movement relative to the base assembly; a muffler assembly including an inner muffler wall having a plurality of throughholes and an outer muffler wall connected to the inner muffler wall to form a muffler channel therebetween that at least partially surrounds the motor; a fan positioned within the base assembly for circulating air along a very specific path therethrough; a plurality of baffles positioned in the airflow path to reduce noise; and a double walled mixing jar assembly attachable to the base assembly including an air gap between an inner mixing container and an outer jar wall for reducing noise attributed to the blending action.