| 主权项 |
1. A blower fan comprising:
an impeller including a plurality of blades arranged to rotate about a central axis extending in a vertical direction and arranged in a circumferential direction, and a blade support portion arranged to support the blades; a motor portion arranged to rotate the impeller; and a housing arranged to contain the impeller; wherein the housing includes:
a lower plate portion arranged to cover a lower side of the impeller, arranged to support the motor portion, and made of a material having a thermal conductivity of 1.0 W/(m·K) or more; anda side wall portion arranged to cover a lateral side of the impeller, connected with the lower plate portion, and made of a material having a thermal conductivity of 1.0 W/(m·K) or more; a channel joining a space above the impeller and a space between the impeller and the lower plate portion to each other in an axial direction is defined between adjacent ones of the blades of the impeller; an upper plate portion arranged to cover an upper side of the impeller includes an air inlet; the upper plate portion, the side wall portion, and the lower plate portion are arranged to together define an air outlet on the lateral side of the impeller; the blower fan further comprises a heat source contact portion with which a heat source is to be in contact, the heat source contact portion being arranged in a surface of the blower fan which faces away from the impeller; the air outlet is a plane parallel to the central axis, and including one of an edge of the upper plate portion, a pair of edges of the side wall portion, and an edge of the lower plate portion that is the closest to the central axis; and the heat source contact portion and the side wall portion are arranged to at least partially overlap with each other in a plan view. |
