Centrifugal volute and air-conditioner indoor unit with the centrifugal volute

Abstract

The invention provides a centrifugal volute which comprises a front wall plate (1) and side wall plates. The side wall plates comprise a first side wall plate (3) and a second side wall plate (4). The first side wall plate (3) comprises a volute tongue (33), an upper side wall plate (3) connected with the volute tongue (33), and a lower side wall plate (32) connected with the volute tongue (33). The lower side wall plate (32) is connected with the second side wall plate (4). The centrifugal volute is characterized in that a first sound attenuation hole (6) is formed in the lower side wall plate (32), and a first sound attenuation chamber (5) communicated with the first sound attenuation hole (6) is arranged on the outer side of the lower side wall plate (32). By the adoption of the structure, the noise peak value of the centrifugal volute and the noise peak value of an air conditioner indoor unit can be effectively reduced, the effect of improving sound quality is achieved, and air volume can be ensured.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a centrifugal volute and an air conditioner indoor unit having the same. Background technique [0002] The noise of the indoor unit of the air conditioner is mainly generated in the air duct system. The indoor unit of the air conditioner usually uses a centrifugal fan to supply air, and there is a noise peak that does not change with the speed of the impeller. Noise peaks appear, seriously affecting sound quality. Therefore, how to reduce the noise peak value of the centrifugal fan has always been a technical issue concerned by those skilled in the art. The patent document with the publication number CN102758798A discloses a centrifugal volute of a range hood, in which the volute tongue on the volute and the wall of the volute connected to the volute tongue are provided with sound-absorbing holes to reduce noise in this way. The inventor tried to install the same sound...

AI Technical Summary

Problems solved by technology

The inventor tried to install the same sound-absorbing hole on the centrifugal volute of the centrifugal fan of the indoor unit of the air conditioner. After testing, it was found that although the total value of the noise was reduced, the sound-absorbing hole would leak air and reduce the air supply pressure, which could not meet the maximum air-conditioning indoor unit. Air Volume Requirements

Not only that, but this kind of volute with sound-absorbing holes can't reduce the noise peak value, that is, compared with ordinary volute, the maximum noise value of this kind of volute cannot be effectively reduced.

Images