Vacuum Cleaner Hood Silencer Layout for Low-Noise Suction
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Solution Overview
Problem
Vacuum cleaning devices with high suction flow rates generate significant noise, particularly due to pulsating suction flows, and existing solutions do not adequately address noise reduction while maintaining a compact design and ease of assembly, service, and maintenance.
Innovation Solution
The suction cleaning device incorporates a hood with an integrated silencer in the outlet channel, which reduces noise and enhances mechanical stability, along with a compact design that houses control electronics and uses soundproofing elements made of foam material to minimize noise further, while maintaining low production costs and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a suction flow with high volumetric flow is achieved with the aid of the suction unit, then the suction cleaning device can effectively clean surfaces, but the noise development is intensified
Solution Approach 1:
A silencer is introduced as an intermediary component in the outlet channel between the suction unit and the environment. This silencer absorbs and dampens the pulsating suction flow, reducing noise emission to the environment while allowing the high volumetric flow to continue functioning for effective cleaning
Solution Approach 2:
The outlet channel is integrated within the hood structure, with the silencer nested inside the outlet channel. This nested arrangement allows the silencer to be positioned optimally for noise reduction while being protected by the hood, and enables compact integration of multiple functions (structural support, noise reduction, flow management) in a space-efficient manner
2Object-generated harmful factors
If soundproofing material with flow channels is arranged at the suction outlet and around the electric motor, then noise is reduced, but the device complexity increases
Solution Approach 1:
The outlet channel and the hood are merged into a single integrated structural component. The outlet channel is formed as an integral part of the hood, eliminating the need for separate soundproofing material installations and reducing structural complexity while maintaining noise reduction functionality
Solution Approach 2:
The hood serves multiple functions: it provides structural support, houses the outlet channel, protects the silencer, and contributes to noise reduction. This multi-functionality eliminates the need for separate dedicated soundproofing components, simplifying the overall device structure
3Object-generated harmful factors
If the outlet channel is arranged outside the hood, then the silencer can be positioned for noise reduction, but the mechanical stability decreases due to exposure to mechanical damage
Solution Approach 1:
The outlet channel containing the silencer is nested within the protective enclosure of the hood. This positioning allows the silencer to maintain its noise reduction function while being protected from mechanical damage by the hood structure
Solution Approach 2:
The hood acts as an intermediary protective structure between the silencer/outlet channel and external mechanical threats. It shields the vulnerable components while allowing the noise reduction function to operate effectively
4Reliability
If control electronics are arranged in a separate housing, then they are protected, but the device size increases and assembly becomes more complex
Solution Approach 1:
The control electronics are integrated into the hood structure, which serves as both the structural component and the protective housing for the electronics. This merging eliminates the need for a separate dedicated housing, reducing overall device size and simplifying assembly
Solution Approach 2:
The hood performs multiple functions including structural support, noise reduction, and protection of control electronics. This multi-functionality allows the electronics to be housed within the existing hood structure without requiring additional protective components, maintaining reliability while minimizing device volume
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 effectively reduces noise levels and increases mechanical stability, allowing for a compact and user-friendly design with reduced noise pollution and lower production costs, while maintaining effective suction power.
Implementation Method 1
an outlet channel 70 is arranged in the hood 62, which houses a silencer 98
Implementation Method 2
uses soundproofing elements made of foam material to minimize noise further
Data Source
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AI summary
The invention relates to a vacuum cleaning device (10) with a suction head (20) comprising a suction unit (110) and a dirt collection container (18) which can be pressurized by the suction unit (110) to create a suction flow, wherein suction air together with the material to be vacuumed can be drawn into the dirt collection container (18) via a suction inlet (28) and the drawn-in suction air can be discharged from the suction unit (110) to the environment via a suction outlet (94) arranged on the suction head (20). To further develop the vacuum cleaning device in such a way that the noise generation can be kept low, it is proposed according to the invention that the suction head (20) has a hood (62) which covers the suction unit (110) and has the suction outlet (94), wherein an outlet channel (70) is arranged in the hood (62) upstream of the suction outlet (94) in which a silencer (98) is positioned.