Fan and air purifier

Abstract

The invention discloses a fan and an air purifier. The fan comprises a motor, a wind wheel and a wind wheel cover, wherein the wind wheel is fixed on a rotating shaft of the motor through a nut; the wind wheel cover is of a shell structure, an opening is formed in the top of the wind wheel cover, and a cavity is formed inside the wind wheel cover; the diameters of the outer wall and the inner wallof the wind wheel cover are gradually reduced from top to bottom; an annular protrusion is arranged at the center of the bottom of the cavity; and the wind wheel cover is fixedly arranged on the windwheel, the rotating shaft of the motor is covered, and the annular protrusion makes contact with the nut. According to the fan and the air purifier, the wind wheel cover is arranged on the wind wheel, looseness of the fastening nut can be prevented, so that the phenomenon that the wind wheel is unbalanced is avoided; and the wind resistance of the airflow can be reduced by the wind wheel cover, and the noise is reduced.

Description

technical field [0001] The invention belongs to the technical field of air purification equipment, and in particular relates to a novel blower fan and an air purifier. Background technique [0002] At present, air pollution is serious, which may cause various diseases. Air purifiers have become one of the choices for people to purify the air. The air purifier is mainly used for the purification and filtration of indoor air. The motor drives the wind wheel to rotate, and the indoor air is sucked into the air purifier, and the clean air is discharged out of the air purifier through the treatment of the filter screen and the negative ion generator. [0003] The fans of existing air cleaners generally have a wind wheel installed on the rotating shaft of the motor, and then the wind wheel is fixed by nuts. When the air purifier is working, the fan rotates at a high speed, which easily causes the nut to loosen, resulting in the loosening of the wind wheel, which makes the wind wh...

AI Technical Summary

Problems solved by technology

When the air purifier is working, the fan rotates at a high speed, which can easily cause the nut to loosen, resulting in the loosening of the wind wheel, making the wind wheel unbalanced when rotating, causing problems such as increased noise and vibration of the purifier.

If the nut is completely loose, it may cause the wind wheel to fall off and be damaged, and the machine cannot run

[0004] Moreover, the wind wheel is fixed by nuts, and the nuts and the shaft of the motor affect the flow of airflow. When the airflow passes through these structures, it will not flow smoothly, affecting efficiency and increasing noise.

Moreover, users can see the nut and motor shaft of the wind wheel inside through the air inlet of the air duct, which affects the customer experience

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