Vacuum Cleaner Motor Chamber Air Path for Noise Reduction
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Solution Overview
Problem
Conventional vacuum cleaners generate significant operating noise due to airflow and vibrations from the motor assembly, which is transmitted outside the cleaner body, making them uncomfortable to use and limiting their use in quiet environments, especially when equipped with high-speed suction motors for enhanced cleaning efficiency.
Innovation Solution
A vacuum cleaner design featuring a motor chamber with a path extension member that guides discharged air in a circuitous manner through detour paths before reaching the air discharge opening, combined with noise-absorption members on the path extension and second partitions, to reduce noise transmission. This design includes a motor housing with protrusion members for supporting the motor assembly and preventing vibration, and a configuration of inner and outer housings to extend and alter the airflow path, effectively reducing noise and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor assembly rotates the suction fan at high speed for higher cleaning efficiency, then productivity is improved, but operating noise increases and becomes more serious
Solution Approach 1:
The patent introduces a path extension member as an intermediary component between the motor assembly and the air discharge opening. This member extends the air passage and guides discharged air in a circuitous manner, effectively reducing noise transmission while preserving the high-speed rotation capability of the suction fan for maintaining cleaning efficiency
2Device complexity
If the air discharge opening is positioned close to the motor assembly for compact design, then device complexity is reduced, but operating noise is transmitted more strongly to the outside
Solution Approach 1:
The path extension member extends the air passage in a dimensional sense, creating a longer and more circuitous path from the motor assembly to the air discharge opening. This dimensional extension allows noise reduction without significantly increasing overall device complexity, as the extension integrates with the existing motor chamber structure
3Loss of time
If a straight air passage is used from the motor assembly to the air discharge opening, then loss of time is reduced and airflow efficiency is improved, but operating noise is transmitted directly to the outside
Solution Approach 1:
The path extension member creates a circuitous, curved air passage instead of a straight line. The air flow is guided along a curved path that loops back, effectively increasing the path length for noise attenuation while the curvature design maintains smooth airflow to minimize turbulence and pressure loss
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
The solution significantly reduces operating noise generated by the motor assembly, particularly in low-frequency bands, while maintaining sufficient airflow and preventing motor overload, allowing for quieter operation and improved user experience.
Implementation Method 1
a path extension member disposed between the motor assembly and the air discharge opening, the sides of which are apart from an inner wall of the motor chamber by a predetermined distance, respectively, to thereby form detour paths, and the air discharged from the motor assembly is guided in a circuitous manner by the path extension member so as to be passed through the detour paths before reaching the air discharge opening
Data Source
AI summary
A vacuum cleaner is disclosed which comprises a motor chamber for mounting a motor assembly that, generates a suction force at a dust suction port, and a discharge port for guiding an air discharged from the motor chamber to the outside of a cleaner body, wherein the motor chamber comprises an air discharge opening which is in fluid communication with the discharge port; and a path extension member disposed between the motor assembly and the air discharge opening, of which edges are spaced apart from an inner wall of the motor chamber by a predetermined distance, respectively, to thereby form a detour path, and the air discharged from the motor assembly is guided in a circuitous manner by the path extension member so as to be passed through the detour path before reaching the air discharge opening. That assembly effectively reduces noise generated during operation of the motor assembly that is detectable outside of the cleaner body.