Vacuum Cleaner Diffuser Layout for Low-Noise Airflow Distribution
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Solution Overview
Problem
Conventional vacuum cleaners face challenges in reducing noise and improving efficiency in removing minute dusts due to complex air passage structures that increase the number of parts and overall size, leading to instability and increased noise.
Innovation Solution
A fan motor apparatus with a diffuser unit that allows air to be introduced and discharged in the same direction, featuring a fluid passage surface with a central inlet pipe and a larger discharge area with multiple holes, separating the suction and discharge areas with a partitioning wall, and incorporating a discharge filter unit for enhanced filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If separate passages are provided for air inlet and air outlet in conventional fan motor units, then airflow distribution and noise reduction are improved, but device complexity and overall volume increase
Solution Approach 1:
The patent combines the air inlet and air outlet functions into a single passage structure. The fan motor unit has one passage that serves both to intake air and discharge air, eliminating the need for separate inlet and outlet passages. This merging of functions reduces the number of parts and simplifies the overall air passage structure while still achieving noise reduction through the diffuser unit's multiple discharge holes.
2Productivity
If separate passages are provided for air inlet and air outlet, then airflow distribution is improved, but the number of parts and overall volume increase
Solution Approach 1:
The patent merges multiple air passage functions into a single integrated passage. Instead of having separate inlet and outlet passages with multiple parts, the design uses one passage that handles both air intake and discharge, with the diffuser unit's multiple holes providing the necessary airflow distribution. This reduces the number of parts while maintaining effective airflow distribution.
3Object-affected harmful factors
If fan motor unit is installed at higher position to provide lower airflow passage, then airflow distribution is improved, but vacuum cleaner stability decreases due to higher center of mass
Solution Approach 1:
The patent inverts the conventional approach by having air discharged through the same direction it enters, rather than requiring the fan motor to be positioned higher to create a downward airflow passage. The single passage design with diffuser holes allows air to be discharged in the same direction as intake, enabling lower installation position and improved stability without compromising airflow distribution.
4Object-affected harmful factors
If multiple air-passing holes are formed in motor housing to distribute airflow, then noise is reduced and airflow distribution is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent segments the air discharge function into multiple small holes within the diffuser unit, which is integrated into the motor housing. Rather than requiring complex separate structures for each hole, the diffuser unit provides a modular solution where multiple discharge openings are systematically arranged. This segmentation approach achieves noise reduction through distributed airflow while maintaining ease of manufacture through the integrated diffuser 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 simplifies the air passage structure, reduces noise, increases the efficiency of dust removal, and enhances user convenience by distributing air uniformly, thereby improving the compactness and cost-effectiveness of the vacuum cleaner.
Implementation Method 1
a diffuser unit which may include a fluid passage surface through which an air stream is drawn in and discharged out of the diffuser
Data Source
AI summary
A fan motor apparatus of a vacuum cleaner having a diffuser unit is provided. The fan motor apparatus of a vacuum cleaner includes a fan motor unit into and from which an air stream is introduced and discharged in the same direction, and a diffuser unit having an air suction area to discharge an air stream to the fan motor unit through a fluid passage surface, the fluid passage surface through which an air stream is drawn in and discharged out of the diffuser. An air discharge area of the diffuser unit may receive the air stream discharged from the fan motor unit, and distribute and discharge the air stream through a perimeter of the air suction area of the fluid passage surface.