The noise of the actual home air conditioner is related to two factors. One is the sound power level produced by the product itself, and the other is the acoustic characteristics of the actual home. The second question is not discussed here. If interested, we can look at the relevant literature. This article only discusses the first question of how to reduce the noise of the products on the basis of the existing products.

The floor type air conditioner (commonly known as the cabinet) according to the refrigeration capacity can be divided into 2 horses, 3 horses, 5 Guiji, which is the largest amount of 2 Guiji, so it is also the focus of our study, that is, some conclusions of this paper to test 2 Guiji do the same can be applied to 3 horses, 5 Guiji, and achieve the same good results.

The indoor floor type air conditioner is in direct contact with the user, and the outdoor machine is usually placed on the outside, people generally do not feel the impact of noise on their own, so this paper mainly studies the problem of indoor noise reduction.

1, the mechanism of noise source formation of floor air conditioner indoor unit

The main noise source of floor type air conditioner includes: motor noise, motor noise, the coupling between the fixed rotating centrifugal fan aerodynamic noise, capillary liquid jet noise, wind and air pressure balance formation of noise. A brief description is given of the formation mechanism of the above noise sources.

2, motor noise

Motor noise is mainly determined by the lubrication precision electromagnetic noise, and the moving parts of rotating parts, according to the current level of technology, with the noise of the motor cabinet itself has been controlled at a lower level. For example: for a cabinet, the noise of the electric machine is generally not more than 30dB (a).