Blender Base Venting Structure for Motor Noise Reduction
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Solution Overview
Problem
Existing food processors fail to effectively reduce noise emitted by the motor and vibrations within the base, as previous noise reduction methods, such as enclosures and baffles, are either ineffective or complex and difficult to manufacture.
Innovation Solution
A base for a food processor with an integral baffle, where the baffle is partially formed by the bottom surface and includes a support flange creating an internal cavity with outlet ports and exhaust vents positioned on opposing sides of the baffle projection, which redirects airflow and noise before it exits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a baffle is added to suppress noise carried by cooling airflow, then noise reduction is improved, but device complexity increases and manufacturing difficulty increases
Solution Approach 1:
The baffle is merged with the bottom surface of the base to form an integral structure. The bottom surface itself is shaped to define the internal cavity and baffle configuration, eliminating the need for separate baffle components and reducing manufacturing complexity while maintaining noise suppression functionality
Solution Approach 2:
The bottom surface serves multiple functions: it provides structural support, defines the internal cavity, creates the baffle configuration for noise control, and positions outlet ports and exhaust vents. This multi-functionality reduces the overall number of components needed in the base
2Temperature
If cooling airflow is provided to the motor, then motor cooling is improved, but noise transmission to the exterior is increased
Solution Approach 1:
The exhaust airflow, which initially carries noise to the exterior, is redirected through the baffle structure to serve as a noise control mechanism. The airflow path is shaped to trap and dissipate noise within the internal cavity while still providing necessary cooling to the motor
Solution Approach 2:
The baffle structure acts as an intermediary between the motor cooling airflow and the exterior environment. It allows cooling airflow to pass through to the motor while blocking and redirecting noise-carrying exhaust airflow away from direct exterior exposure
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 noise transmission by redirecting airflow and noise within the base, ensuring sufficient motor cooling while being simple to manufacture and cost-effective.
Implementation Method 1
Cooling air is typically provided to the motor within the base to prevent overheating. This cooling air may be drawn in through an air inlet and forced out of the base through an air exhaust.
Implementation Method 2
The motor is a direct source of noise when in operation, and also is an indirect source of noise due to the vibration it creates within the base. The vibrations created by the operating motor cause the base itself, and other components within the base, to vibrate, thereby generating additional noise.
Data Source
AI summary
A base for a blender housing a motor and including controls for operation of the blender. The base includes an air intake, an air exhaust, and a baffle, wherein the air exhaust and baffle are formed as a part of the bottom of the blender base and act to reduce the sound emitted by the blender. The bottom of the blender base includes an internal cavity defined partially by a support flange where heated air is exhausted. The air is then forced to change directions before exiting through exhaust ports.