Method for producing silencing device, silencing device and air purifier
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Solution Overview
Problem
Conventional air purifiers generate noise levels higher than 50dB, which can disrupt sleep, impair hearing, and pose health risks, necessitating effective noise reduction solutions for indoor environments.
Innovation Solution
A silencing device comprising a sound insulation mesh plate and silencing cotton is designed to absorb sound waves exceeding a specific frequency limit, with structural parameters such as mesh area, silencing cotton volume, and depth optimized to reduce noise, using the formula f = C^2 * π * A * V * L, where C is sound velocity, A is mesh area, V is silencing cotton volume, and L is depth, to implement noise reduction treatment in air purifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional air purifiers are used, then air purification function is provided, but noise pollution exceeds 50dB causing health hazards
Solution Approach 1:
The silencing device applies local quality by creating meshes with specific structural parameters (area, depth, spacing) that are optimized to absorb particular sound wave frequencies. Different regions of the silencing device can have different mesh configurations to target different frequency ranges generated by the air purifier's fan and motor components.
Solution Approach 2:
The silencing device utilizes porous materials including the mesh structure with controlled pore sizes and silencing cotton filling. The porous configuration allows sound waves to penetrate while being absorbed through friction and viscous losses within the pore structure, effectively reducing noise without blocking airflow needed for air purification.
2Object-affected harmful factors
If silencing device is added to reduce noise, then noise levels decrease, but device complexity increases
Solution Approach 1:
The silencing device employs parameter changes by systematically varying mesh area, mesh depth, mesh spacing, and filling material density to optimize noise reduction across different frequency ranges. These parameter adjustments allow tuning of the device to match the specific noise spectrum of the air purifier while maintaining a relatively simple overall structure.
Solution Approach 2:
The silencing device uses composite materials combining mesh structures (metal or plastic) with silencing cotton or other acoustic absorbing materials. This composite approach leverages the advantages of both materials: the mesh provides structural integrity and airflow passage while the filling material provides sound absorption, achieving effective noise reduction without excessive complexity.
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 silencing device effectively reduces noise levels by absorbing sound waves above the frequency limit, creating a quieter indoor environment and mitigating health risks associated with excessive noise pollution.
Implementation Method 1
a silencing device adapted to the air purifier to be silenced is produced according to the frequency value, at least one structural parameter of the silencing device being configured according to the frequency value and the silencing device being configured to reduce a sound with the frequency value exceeding the sound wave frequency limit
Data Source
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AI summary
The present disclosure relates to method for producing a silencing device, the silencing device and an air purifier. The method includes that: a sound wave spectrum when an air purifier to be silenced performs operations is acquired (S101); a frequency value, which exceeds a sound wave frequency limit for the air purifier, of the sound wave spectrum is calculated (S103); and a silencing device adapted to the air purifier to be silenced is produced according to the frequency value, at least one structural parameter of the silencing device being configured according to the frequency value and the silencing device being configured to reduce a sound with the frequency value exceeding the sound wave frequency limit (S105).