Suction device
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Solution Overview
Problem
Vacuum cleaners generate significant low-frequency noise, particularly 'popping' noises during filter cleaning, which are not effectively mitigated by existing technologies.
Innovation Solution
Incorporating a perforated plate resonator acoustically connected to the cleaning device, which absorbs low-frequency noise through friction of oscillating air columns on the perforated plate, effectively reducing noise emissions below 2000 Hz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cleaning device is used to clean the filter device, then the filter cleaning function is improved, but low-frequency noise emissions increase
Solution Approach 1:
A perforated plate resonator is introduced as an intermediary acoustic component between the cleaning device and the external environment. The resonator absorbs low-frequency noise generated during filter cleaning through friction of oscillating air columns on the perforated plate, reducing noise emissions by more than 2.5 dB while preserving the cleaning function
Solution Approach 2:
The acoustic parameters of the cleaning device are modified by adding a resonator with specific geometric dimensions and perforated plate characteristics. The resonator's resonant frequency is tuned to target the low-frequency noise range below 2000 Hz, changing the acoustic response of the system to suppress harmful noise while maintaining cleaning effectiveness
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
Achieves noise reduction of more than 2.5 dB, specifically targeting and dampening 'popping' noises generated during filter cleaning, with the perforated plate resonator designed to optimize sound absorption properties for the specific frequency range.
Implementation Method 1
sound is absorbed in a perforated plate resonator by the friction of an oscillating air column on an opening wall of the perforated plate of the perforated plate resonator
Implementation Method 2
sound is absorbed in a perforated plate resonator by the friction of an oscillating air column on an opening wall of the perforated plate
Implementation Method 3
The at least one noise source generates, for example, noises due to a pressure change, the pressure change being in particular greater than 50 mbar and the pressure change being generated in a period of less than 0.05 s
Data Source
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AI summary
The invention relates to a suction device, which comprises a suction unit (26), a dirt collection container (12), a filter apparatus (21), wherein the dirt collection container (12) is fluidically connected to the suction unit (26) via the filter apparatus (21), and a cleaning apparatus (33) for the filter apparatus (21), wherein the cleaning apparatus (33) forms a noise source for noise emissions in a frequency range below 2000 Hz and wherein at least one hole plate resonator (84) is associated with the cleaning apparatus (33), wherein the at least one hole plate resonator (84) has a chamber (85) having a chamber space (88) and a chamber wall (86) and has at least one hole plate (90), which covers the chamber space (88), and wherein the at least one hole plate (90) has a sound-effective connection to the cleaning device (33).