Air purifier

An air purifier comprising:

• a casing including an air inlet and an air outlet;
• an air blowing device for drawing air from the inlet into an inside of the casing and blowing the air out from the outlet;
• a purification device for purifying the air flowing inside the casing;
• an air guiding device including a plurality of sets of movable bodies, each set of movable bodies including at least two movable bodies facing each other across a flow passage of airflow blown out from the outlet of the casing to an outside of the casing, wherein the air guiding device is capable of varying a flow passage area and a blow-out direction of the airflow by the at least two movable bodies swinging close to each other and away from each other, and wherein the sets are located downstream of the air blowing device;
• and
• a control device for controlling the air blowing device and the air guiding device, wherein
• the outlet is formed as an elongated quadrangular opening,
• the sets are disposed side by side in a length direction of the outlet, and
• each movable body is individually swung, whereby the flow passage areas of a plurality of parts in a cross section of the flow passage of the airflow are varied.