Volute, fan and air conditioner

Abstract

The invention discloses a volute, a fan and an air conditioner. The volute is provided with an air outlet, an air inlet and an air passage communicating with the air outlet and the air inlet. The volute is characterized in that the volute is provided with a volute tongue; a groove is formed in the surface, making contact with airflow, of the volute tongue; and a sound absorbing structure coupled with the groove to form a noise reduction portion is arranged in the groove. According to the technical scheme, the sound absorbing structure and the groove are coupled to form the noise reduction portion used for silencing and noise reduction. When airflow inside the volute flows through the volute tongue, the noise reduction portion can relieve impact of the airflow to the volute tongue and airflow separation on the surface of the volute tongue, flowing of the airflow is more uniform, meanwhile, the pressure pulsation degree is lowered, and the noise inside the volute is further reduced.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a volute, a fan and an air conditioner. Background technique [0002] Existing air conditioners are used more and more widely, and the demand is also increasing. The fan in the existing air conditioner is rotated by the impeller, and the air flows in the volute under the guidance of the impeller. A volute tongue is set in the volute to prevent the air from circulating in the volute. Under normal operating conditions, the fan will produce These noises are mainly composed of rotational noise and eddy current noise. The coupling between the blade and the volute tongue has an impact on the rotational noise, and when the airflow flows through the volute tongue, the boundary layer on the surface of the volute tongue develops to a certain extent and will be at the end of the volute tongue. The vortex shedding occurs at the edge of the volute, which increases the noise at the a...

AI Technical Summary

Problems solved by technology

The fan in the existing air conditioner is rotated by the impeller, and the air flows in the volute under the guidance of the impeller. A volute tongue is set in the volute to prevent the air from circulating in the volute. Under normal operating conditions, the fan will produce These noises are mainly composed of rotational noise and eddy current noise. The coupling between the blade and the volute tongue has an impact on the rotational noise, and when the airflow flows through the volute tongue, the boundary layer on the surface of the volute tongue develops to a certain extent and will be at the end of the volute tongue. The vortex shedding occurs at the edge of the volute, which increases the noise at the air outlet; in addition, there will be pressure pulsations near the volute tongue, which will also cause noise

Therefore, the blower fan of the air conditioner in the prior art has the problem that the noise is relatively large

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