Centrifugal fan, neck fan, and vortex shell assembly

A neck fan, configured to be worn around a neck of a user, the neck fan comprising:

• a shell, comprising at least two sub-shells and defining at least one air inlet, wherein the at least two sub-shells are connected to each other to cooperatively form a receiving cavity;
• at least two fan assemblies, received in the receiving cavity, wherein two fan assemblies of the at least two fan assemblies are respectively disposed at two free end regions of the neck fan;
• each of the two fan assemblies comprises a drive shaft and fan blades mounted on the drive shaft, an end of the drive shaft of one of the two fan assemblies and an end of the drive shaft of the other one of the two fan assemblies are fixedly arranged on a same one of the at least two sub-shells, the drive shaft is extending towards the receiving cavity, and the other end of the drive shaft is a free end spaced apart from the an inner surface of another one of the at least two sub-shells facing opposite to the one of the at least two sub-shells;
• wherein the at least one air inlet is defined in the another one of the at least two sub-shells.

A neck fan, configured to be worn around a neck of a user, the neck fan comprising:

• a shell, comprising a mounting shell and an outer cover connected to the mounting shell,
• wherein the mounting shell has a plurality of mounting positions and forms a receiving cavity, the plurality of mounting positions are configured to enable a plurality of electronic elements to be mounted thereon;
• the outer cover, when being connected to the mounting shell, covers an opening of the receiving cavity;
• the shell has an inner side disposed near the neck, the inner side is a part of the mounting shell, the outer cover is disposed away from the neck;
• at least three fan assemblies, received in the receiving cavity, wherein each of the at least three fan assemblies comprises a drive shaft and fan blades mounted on the drive shaft, an end of the drive shaft is fixedly arranged on the mounting shell, the drive shaft is extending from the mounting shell towards the receiving cavity, and the other end of the drive shaft is a free end spaced apart from the outer cover.