Sound insulation cotton, air-conditioning outdoor unit and sound insulation structure mounting method

Abstract

The invention discloses sound insulation cotton, an air-conditioning outdoor unit and a sound insulation structure mounting method. The sound insulation cotton sequentially comprises a porous sound absorbing layer, a sound insulation shock absorption layer and a resonant sound absorbing layer from inside to outside, wherein the porous sound absorbing layer is used for absorbing high-frequency noise and made of open-celled fiber materials, and the resonant sound absorbing layer is used for absorbing middle and low frequency noise and made of closed cell foam materials. By the aid of the porous sound absorbing layer, the sound insulation shock absorption layer and the resonant sound absorbing layer from inside to outside, sound wave energy of various frequency bands emitted by a compressor is absorbed and weakened, noise is effectively reduced, and customer satisfaction is improved.

Description

technical field [0001] The invention relates to the technical field of sound insulation devices, in particular to a sound insulation cotton, an air conditioner outdoor unit with the sound insulation cotton, and an installation method for a sound insulation structure of the air conditioner outdoor unit. Background technique [0002] With the improvement of the quality of life, people's requirements for the use of air conditioners are no longer simple requirements for cooling and heating effects, and the noise problem has developed into the second largest concern of people for air conditioners. The main noise source of the air conditioner is the compressor part. Especially in summer, due to the limited floor space and the influence of neighbors on adjacent floors opening windows for ventilation, the noise of the outdoor unit disturbs the residents and is the focus of consumer complaints. [0003] The solution to this kind of noise problem in existing products is generally to a...

AI Technical Summary

Problems solved by technology

However, due to the influence of the pipeline connected to the compressor and the liquid storage tank, some parts of the compressor cannot be covered by felt, which makes the noise reduction effect not good; and the current felt covering operation is complicated, which makes the production efficiency relatively low. Low

In addition, felt is an open-cell material, and its sound absorption mechanism is that sound waves penetrate into the pores of the material, and the pores are open holes that communicate with each other internally, subject to friction and viscous resistance of air molecules, and mechanical vibration of fine fibers, so that the sound It can be converted into heat energy to achieve the purpose of sound absorption and noise reduction. In this way, the felt mainly acts as sound absorption and noise reduction for high-frequency noise above 1000 Hz, and cannot effectively solve the problem of large mid-low frequency noise below 1000 Hz; but the air conditioner noise is audible. In the sound frequency range, the middle and low frequencies below 1000Hz account for a large proportion of the total sound level and belong to the sensitive frequency band of human ears, which is very easy to cause complaints about the impact of noise on consumers; in addition, the pipeline connected to the compressor vibrates The noise is also an important noise source of the outdoor unit

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