Soundproof cover of compressor, compressor and air conditioner outdoor unit

Abstract

The invention discloses a soundproof cover of a compressor, the compressor and an air conditioner outdoor unit. The soundproof cover of the compressor comprises a perforation board and a soundproof plate, wherein a porous sound absorbing layer is arranged between the perforation board and the soundproof plate; the porous sound absorbing layer is 5-60mm thick, and the soundproof plate is 1-2mm thick. The soundproof cover of the compressor disclosed by the invention has an excellent sound isolating and absorbing effect, can absorb wide frequency noise radiated by the compressor, reduces the integral OA value, also can absorb noises at a special fundamental frequency and the frequency doubling noises thereof, and reduces the frequency doubling noise peak of the compressor. The sound waves offrequency bands sent by the compressor firstly arrive the perforation plate, enter the porous soundproof layer through the perforation board and reflect back and forth between the perforation board and the soundproof plate. The soundproof layer is holes penetrating one another inside and is subjected to air molecular friction and viscous resistance. The sound energy is converted into heat energy through inner friction of air molecules and mechanical vibration of fine fibers, so that the purposes of absorbing sounds and reducing noises are achieved.

Description

Technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to a compressor soundproof cover, a compressor and an 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 become the second major concern of people for air conditioners. The main noise source of air conditioners is the compressor part, especially in summer due to the limited floor spacing and the influence of neighbors on adjacent floors opening windows for ventilation, making the noise of the outdoor unit disturb the residents, which is the focus of consumer complaints. [0003] The existing product solutions to this kind of noise problem are generally to add sound insulation cotton to the outdoor unit. The sound insulation cotton is generally felt. Specifically: wrap it ...

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 medium and low frequency noise below 1000Hz has a long transmission distance and strong transmission ability, which accounts for a large proportion of the total sound level received by consumers, and it is very easy to complain about the impact of noise on consumers; in addition, with The vibration noise of the pipeline connected to the compressor is also an important noise source of the outdoor unit

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