Fan

A fan, comprising:

• a battery pack coupling portion for mounting a battery pack;
• an air output assembly comprising fan blades, a front housing located on a front side of the fan blades, and a rear housing located on a rear side of the fan blades, wherein the fan blades are driven by a motor to rotate about a first axis, an airflow flows out from the front housing, and the airflow flows in from the rear housing;
• a pivot assembly connected to the air output assembly, wherein the air output assembly is rotatable about a second axis of the pivot assembly;
• and
• a support assembly connected to the pivot assembly, wherein the support assembly is capable of supporting the air output assembly;
• wherein a maximum distance of the front housing available for air output in an up and down direction is defined as an air output diameter of the fan, a distance between the first axis and the second axis is defined as a first distance, and a ratio of the first distance to the air output diameter is greater than or equal to 25%.