Sound insulation cotton with multi-layer sound absorbing materials and compressor

Abstract

The invention belongs to the technical field of noise reduction and discloses a sound insulation cotton with multi-layer sound absorbing materials and a compressor. The sound insulation cotton includes an inner sound absorbing material layer and an outer sound insulation material layer, wherein the sound absorbing material layer includes at least two layers of sound absorbing materials of the samematerial or different materials with the body density increasing layer by layer or the porosity decreasing layer by layer or the flow resistance increasing layer by layer or the structure factor increasing layer by layer from the inside to the outside, the sound insulation material layer includes a layer of sound insulation materials, the sound absorbing material layer is made by stitching all the sound absorbing materials with sutures, and the layer with the largest density or the smallest porosity, the largest flow resistance or the largest structural factor of the sound absorbing materiallayer is cemented with the sound insulation material layer. The sound insulation cotton is advantaged in that the sound insulation cotton has a wide range of sources, simple structure, easy processingand wide applicability, has a higher sound absorption coefficient, is more conducive to noise absorption, especially for noise with a wide frequency band.

Description

technical field [0001] The invention belongs to the technical field of noise reduction and noise reduction, and in particular relates to a sound-insulating cotton containing multiple layers of sound-absorbing materials and a compressor. Background technique [0002] Existing air conditioners generally have a compressor, which is considered the heart of the air conditioner, and the noise is relatively loud during operation. In a noisy environment during the day, people may not feel the noise of the air conditioner compressor, but it is relatively quiet At night, the noise from the air conditioner compressor will be extraordinarily noisy, especially the low-frequency noise, which is the main source of human discomfort and will seriously affect people's sleep. [0003] The compressor is the main source of noise generated by the outdoor unit of the air conditioner. In order to reduce the noise radiated from the compressor, a common measure is to wrap the compressor around the co...

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Problems solved by technology

[0005] In view of the above-mentioned technical problems in the prior art, one of the objectives of the present invention is to provide a sound-insulating cotton containing multiple layers of sound-absorbing materials, which arranges at least two kinds of sound-absorbing materials with different acoustic parameters according to specific rules and Fixed, with a higher sound absorption coefficient, which is more conducive to the absorption of noise, and solves the problem that the sound insulation cotton absorbs less radiated noise from the compressor

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