Suction Inlet Soundproofing Structure for Turbulence Noise Reduction
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Solution Overview
Problem
Existing suction apparatuses for domestic and professional use fail to completely eliminate noise emissions from suction motors and air turbulence, leading to continuous and annoying noise, despite the use of soundproofing materials and active noise reduction units, which are costly and complex to produce.
Innovation Solution
A suction apparatus with a soundproofing body made as a monoblock of soundproofing material, featuring an inlet aperture and a separation and diversion mechanism that directs air streams into sub-streams towards the peripheral walls, preventing direct noise communication and reducing turbulence, thus eliminating noise emissions without the need for costly active devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If soundproofing materials and active noise reduction units are used, then noise emissions are reduced, but device complexity and production costs increase
Solution Approach 1:
The invention extracts the noise reduction function from complex active noise reduction units and multiple soundproofing materials, isolating only the essential passive soundproofing lining made of flexible expanded polyurethane agglomerate. This simplifies the device by removing unnecessary complex components while maintaining effective noise reduction through optimized material selection and strategic placement around the motor and air stream paths.
Solution Approach 2:
The invention merges the soundproofing function into a single integrated lining material that serves multiple purposes: reducing motor noise, absorbing air stream turbulence noise, and providing thermal insulation. This consolidation eliminates the need for separate active noise reduction units and multiple different soundproofing materials, thereby reducing device complexity while maintaining comprehensive noise control.
2Object-affected harmful factors
If soundproofing materials and active noise reduction units are used, then noise emissions are reduced, but production costs increase
Solution Approach 1:
The invention employs a cost-effective flexible expanded polyurethane agglomerate lining that provides excellent noise reduction properties at a lower cost compared to expensive active noise reduction units with microphones and loudspeakers. This material choice significantly reduces production costs while maintaining effective noise control throughout the intended service life of the suction apparatus.
Solution Approach 2:
The invention extracts and eliminates expensive active noise reduction units from the design, retaining only the essential passive soundproofing lining. This extraction of unnecessary complex and costly components directly reduces production costs while the optimized material and placement strategy ensure noise emissions remain effectively controlled.
3Ease of manufacture
If the inlet aperture is configured with straight and squared walls, then manufacturing is simplified, but turbulence and noise are increased
Solution Approach 1:
The invention applies curved or rounded edges and surfaces to the inlet aperture configuration instead of straight and squared walls. This curvature modification reduces turbulence and vortex formation in the air stream, thereby decreasing noise emissions. The curved geometry maintains ease of manufacture through standard molding techniques while effectively mitigating the harmful turbulence and noise associated with sharp edges.
4Productivity
If the noise is not completely screened from the inlet aperture, then air flow is maintained, but noise propagates freely
Solution Approach 1:
The invention applies soundproofing lining material specifically in localized areas where noise generation occurs - around the motor and along the air stream paths - rather than completely blocking the inlet aperture. This selective local soundproofing maintains adequate air flow through the aperture while effectively screening noise propagation in the critical zones where turbulence and motor noise are generated.
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 noise emissions by up to 30% compared to standard suction apparatuses, with reduced assembly costs and improved soundproofing quality, ensuring high suction efficiency and noise abatement.
Implementation Method 1
soundproofing means, suitable to reduce or eliminate the noise produced by the suction means and/or by the stream taken in
Implementation Method 2
means to separate and divert the stream into a plurality of sub-streams directed toward at least the peripheral walls of the soundproofing body
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A suction apparatus (10) comprises a suction body (11) provided with an inlet aperture (19) to take in a stream (F) of air and/or fumes from a first environment, a discharge outlet (18) for the stream (F) taken in, to a second environment, suction means (17) to take in the air and/or fumes and soundproofing means suitable to reduce or eliminate the noise produced at least by the suction means (17) and/or the stream (F) taken in. The soundproofing means comprise a soundproofing body (12) made as a monoblock of soundproofing material, which houses inside itself the suction means (17) and, in substantial correspondence with the inlet aperture (19), has one or more means (29) to separate and divert the stream (F) toward at least the peripheral walls (12c, 12d) of the soundproofing body (12).