Patent ID: 8794915

Claim:
A blower fan, comprising: an impeller arranged to rotate about a center axis; a motor arranged to rotate the impeller about the center axis; and a housing arranged to accommodate the impeller; wherein the housing includes an upper surface portion arranged to cover an upper surface of the impeller, a lower surface portion arranged to cover a lower surface of the impeller, and a side wall portion arranged to cover a side surface of the impeller and having an air discharge port; the upper surface portion includes a motor fixing portion to which the motor is fixed, a peripheral portion positioned around the motor fixing portion, and a plurality of ribs interconnecting the motor fixing portion and the peripheral portion, the upper surface portion including a plurality of air intake ports defined between the motor fixing portion, the peripheral portion, and the plurality of ribs and being arranged to oppose the impeller; and the peripheral portion includes a peripheral low portion arranged to substantially surround outer peripheries of the plurality of air intake ports and positioned lower than upper surfaces of the plurality of ribs and a peripheral high portion that is provided with rib extension portions continuously extending from the plurality of ribs and positioned higher than an upper surface of the peripheral low portion.