A rotating device comprising: an axial member; a tubular rotating body rotatable in relation to the axial member; a tubular housing surrounding the rotating body; a bearing supporting the rotating body with respect to the axial member; a stator inside the rotating body; and one or a plurality of rotor blades provided to the rotating body.

An inline axial flow fan includes a first fan including a first impeller, a first motor portion, and a first case, and a second fan including a second impeller, a second motor portion, and a second case, the first fan and the second fan being positioned in sequence from one axial side to another axial side. The first case includes multiple first slits, and the second case includes multiple second slits. The inline axial flow fan includes a flange extending radially outward from an outer peripheral surface of the first case or the second case located between the first slit and the second slit in the axial direction.

A counter-rotating fan, comprising an impeller assembly and an air guide structure. The impeller assembly comprises a first stage impeller and a second stage impeller, of which the rotation directions are opposite. The pressure surfaces of first blades of the first stage impeller are configured to be opposite the suction surfaces of second blades of the second stage impeller, and from the blade root to the blade tip, each of the first blades and the second blades bends toward its own rotation direction. The air guide structure comprises a flow guide cover. The flow guide cover is provided at the center position of the air intake side of the first stage impeller, and the air intake side surface of the flow guide cover at least partially forms a flow guide surface, the flow guide surface extending along the axis of the first stage impeller in the direction away from the counter-rotating fan.

A serial-type diagonal fan assembly having a first fan and at least one second fan is provided. The first fan has a first front fan frame and a first fan wheel. A first hub of the first fan wheel has a radial cross-sectional area increased from a top toward a bottom of the first hub. The second fan has a second front fan frame and a second fan wheel, the second hub of the second fan wheel has an axial cross-sectional area increased from a top to a bottom of the second hub. The first fan and the second fan are arranged in a series. A spoiler is arranged on a second air inlet of the second front fan frame, an outer edge of the spoiler is embedded in a positioning groove of the second front fan frame without protruding from the second front fan frame.

A fan package of an information handling system includes a rear cooling fan, a front cooling fan, and a fan fin package. The rear cooling fan generates a first airflow. The front cooling fan generates a second airflow. The fan fin package is in physical communication with the rear cooling fan and the front cooling fan. The fan fin package includes multiple fins. Based on the first airflow and the second airflow, the fins rotate between a closed position and an open position. The fins are biased toward the closed position.

A serial axial fan includes a first axial fan, a second axial fan, and a rectifying portion. The second axial fan is on one side in the axial direction with respect to the first axial fan and is connected in series to the first axial fan with the rectifying portion interposed therebetween. The rectifying portion includes a chassis with a cylindrical shape surrounding the central axis, a rectifying blade portion extending to a radially inner side from a radially inner surface of the chassis, and an air feeding space on the radially inner side of the rectifying blade portion. The rectifying blade portion extends at least in the axial direction and is inclined relative to another side in the circumferential direction from another side in the axial direction toward the one side in the axial direction.

A system and method are directed to a fan board sled assembly comprising a fan circuit board including a first end and an opposing second end, a fan cage module including a front section for receiving and removably securing the first end of the fan circuit board to the fan cage module, and a guide bracket including a base section for receiving and removably securing the second end of the fan circuit board to the guide bracket. The fan cage module further includes a back section for receiving one or more fan bodies. The combined fan circuit board, fan cage module and guide bracket are a single integrated unit insertable and extractable from a chassis opening of a computer chassis.

A blower may include an operation rod extending in a front-rear direction, a rear housing disposed on a rear portion of the operation rod and housing a prime mover, and an attachment detachably attached to a front portion of the operation rod. The attachment may include an air passage pipe housing a fan driven by the prime mover; an intake pipe disposed on a rear portion of the air passage pipe, and a nozzle disposed on a front portion of the air passage pipe. A sound absorbing material may be disposed on an inner surface of the intake pipe.

A series fan includes a first fan and a second fan. The first fan includes a first frame body with a wind incoming side and a connection side at two sides, a first dynamic blade impeller and a first shaft seat. The first dynamic blade impeller is pivotally disposed on the first shaft seat and has first dynamic blades. The second fan includes a second frame body, a second dynamic blade impeller and a second shaft seat. Two sides of the second frame body are formed with a wind outgoing side and a mating side mated with the connection side in communication therewith. The second dynamic blade impeller is pivotally disposed on the second shaft seat and has second dynamic blades. At least one connected section of the second dynamic blade is integrally connected with at least one connection section of the first dynamic blade to form a driving blade.

A counter-rotating fan assembly includes an upstream fan that rotates in a first direction about a common axis and a downstream fan that rotates in a second, opposed direction about the common axis. The assembly has an upstream motor that drives the upstream fan, and an upstream motor support that supports the upstream motor. The assembly also has a downstream motor that drives the downstream fan, and a downstream motor support that supports the downstream motor. The upstream motor support is located upstream of the upstream fan, and the downstream motor support is located downstream of the downstream fan.