US Patent 11771018 Blower

A blower may include: a volute case defining a suction port, a volute chamber, and a discharge port; an impeller rotatably supported within the volute chamber; a motor connected to the impeller and configured to drive the impeller; and an outer case accommodating the suction port of the volute case and the motor. The outer case may include an external suction port and define an air passage extending from the external suction port to the suction port of the volute case. When the blower is held or worn in a predetermined posture by a user, the external suction port of the outer ease may be configured to be located so as to be open vertically downward.