Centrifugal fan

A centrifugal fan comprising:

• a motor including a rotary portion that rotates about a center axis extending up and down;
• an impeller fixed to the rotary portion and rotating together with the rotary portion;
• and
• a housing that accommodates the motor and the impeller;
• wherein
• the rotary portion includes a rotor holder in which a magnet is fixed;
• the impeller includes:
• a plurality of blade portions disposed at intervals in a circumferential direction;
• and
• a blade support portion supporting the plurality of blade portions on a radial-direction outer side;
• the housing includes:
• an inlet port provided on an upper surface of the housing and penetrating the housing in an axial direction;
• and
• an outlet port provided on a side surface of the housing and penetrating the housing in a radial direction;
• at least a portion of an inner circumferential surface of the blade support portion faces an outer circumferential surface of the rotor holder in the radial direction with a gap therebetween in which an adhesive agent is present at least in a portion of the gap;
• and
• at least one of the outer circumferential surface of the rotor holder and the inner circumferential surface of the blade support portion includes a recessed portion that is recessed in the radial direction and in which the adhesive agent is present.