Direct current brushless fan and drive apparatus

A direct current (DC) brushless fan, comprising:

• a fan seat;
• a fan blade disposed in the fan seat;
• and
• a drive apparatus disposed on the fan seat and connected to the fan blade, wherein the drive apparatus is configured to drive the fan blade to rotate, and the drive apparatus includes:
• a housing disposed on the fan seat, wherein the housing is in a shape of the letter “L” and has a first portion and a second portion that is connected to the first portion, wherein the first portion has a drive space, and the second portion has a setting space in spatial communication with the drive space, and wherein a projection path defined by orthogonally projecting the first portion toward the second portion is defined as an installation range;
• a DC brushless motor arranged in the drive space, wherein the DC brushless motor is connected to the fan blade;
• a control unit disposed in the second portion and electrically connected to the DC brushless motor;
• an adaptation unit arranged in the setting space, wherein at least 80% of a volume of the adaptation unit is arranged within the installation range, and wherein the adaptation unit is electrically connected to the control unit;
• an alternating current (AC) input interface disposed in the second portion and arranged in the installation range, wherein the AC input interface is electrically connected to the adaptation unit, and wherein the AC input interface is configured to electrically connect to a utility power;
• a DC input interface disposed in the second portion and arranged in the installation range, wherein the DC input interface is electrically connected to the control unit;
• and
• a power storage detachably disposed on the second portion and arranged at an installation position of the second portion, wherein when the power storage is arranged at the installation position of the second portion, the power storage covers the AC input interface and is electrically connected to the DC input interface.