Air blower

An air blower, comprising:

• a fan member rotatably provided to provide transfer force to a fluid;
• a flow passage-forming member that accommodates the fan member, has a space formed to communicate with the outside, and includes an outer circumference surrounding the fan member;
• a scroll unit rotatably accommodated in the space of the flow passage-forming member;
• and
• a housing that communicates with the space of the flow passage-forming member and the outside, covers the space of the flow passage-forming member and the scroll unit, and is coupled to the flow passage-forming member,
• wherein the scroll unit comprises:
• a scroll motor fixedly coupled to the housing;
• a scroll body coupled to the scroll motor and rotated by the operation of the scroll motor;
• and
• a scroll opening formed through a radial outer circumference of the scroll body and communicating the space of the flow passage-forming member with the outside, and
• wherein when the fan member is operated,
• external fluid flows into the space in the axial direction of the flow passage-forming member and is discharged in the outer circumferential direction of the flow passage-forming member through the scroll opening, and
• as the scroll unit is rotated, the position of the scroll opening changes, and the direction in which the fluid is discharged to the outside is adjusted.