Handheld Vacuum Motor Chamber Air Diffusion to Reduce Exhaust Noise
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Solution Overview
Problem
Conventional surface cleaning apparatuses often produce excessive noise due to the direct exhaust of motor air, which can be bothersome during operation.
Innovation Solution
The apparatus features a motor chamber with exhaust air passing through an air diffusing member and exiting downwardly via an underside outlet, reducing noise by diffusing and redirecting the airflow around the motor chamber, thereby minimizing noise emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If exhaust air is directly discharged from the motor chamber, then the structure is simple, but noise output is excessive
Solution Approach 1:
An air diffusing member is introduced as an intermediary component between the motor chamber and the external environment. This diffuser redirects exhaust air flow around opposing sides of the motor chamber and through diffusing passages, transforming the direct exhaust path into a distributed flow pattern that reduces noise while maintaining structural simplicity
Solution Approach 2:
The exhaust air flow is segmented into multiple paths by the air diffusing member. Instead of a single direct exhaust stream, the air is divided to flow around opposing sides of the motor chamber and through multiple diffusing passages, which disperses the noise and reduces overall noise output
2Object-generated harmful factors
If air diffusing member is added to redirect exhaust air, then noise output is reduced, but device complexity increases
Solution Approach 1:
The air diffusing member serves multiple functions simultaneously: it redirects exhaust air flow, diffuses the air stream to reduce noise, and integrates with the existing housing structure. This multi-functionality achieves noise reduction without proportionally increasing device complexity
Solution Approach 2:
The air diffusing member is implemented as a thin-walled structure with integrated diffusing passages that conform to the motor chamber geometry. This thin-film approach provides effective flow redirection and noise diffusion while adding minimal structural complexity and mass
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 significantly reduces noise output during operation by diffusing and redirecting exhaust air, enhancing user experience and operational comfort.
Implementation Method 1
through an air diffusing member that is connected to the motor chamber and to an internal wall of the housing
Implementation Method 2
air from the motor chamber passes to the exhaust outlet around opposing sides of the motor chamber
Data Source
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AI summary
A surface cleaning apparatus is described including: a housing supporting: a suction source including a motor with an axle which rotates a fan; and a dirt collection container, wherein the motor is positioned within a motor chamber, and wherein the motor chamber is positioned within a further chamber, and there being an opening in the motor chamber for permitting exhaust air to pass therefrom to the further chamber, wherein the housing includes an exhaust outlet and wherein air from the motor chamber passes to the exhaust outlet around opposing sides of the motor chamber. In an alternative embodiment air from the motor chamber passes to the exhaust outlet through an air diffusing member.