Abstract: An outlet airflow direction control device includes a fan and a frame. The frame has an inlet and an outlet via which an amount of fluid flows into and out of the frame, and is internally provided at the outlet with a hub seat for supporting the fan thereon. A plurality of fluid control elements are radially provided between the frame and the hub seat to connect them to each other. Each of the fluid control elements is connected at an outer end, which forms a directional-guide section, to the frame, and at an inner end, which forms a connecting section, to the hub seat. The directional-guide section has an area larger than that of the connecting section, so that the fluid control elements are adapted to control a flow direction of the fluid flown out of the outlet of the frame.

Abstract: A cooling fan with fluid control device comprises a fan blade assembly and a frame member. The frame member provides a hub seat movably attached with the fan blade assembly and formed with a plurality of fluid control elements at the inner side thereof to control radial pressure of fluid. The frame member at least has a fluid guide part connected to the fluid control elements with a first through hole and a second through hole being in the fluid guide part and the first through hole being greater than the second through hole. When the fan blade assembly rotates to move the fluid, the fluid can flow toward the center of the frame member by way of the fluid control elements and the fluid guide part to increase the amount of the fluid at the rear side of the hub seat.

Abstract: An outlet airflow direction control device includes a fan and a frame. The frame has an inlet and an outlet via which an amount of fluid flows into and out of the frame, and is internally provided at the outlet with a hub seat for supporting the fan thereon. A plurality of fluid control elements are radially provided between the frame and the hub seat to connect them to each other. Each of the fluid control elements is connected at an outer end, which forms a directional-guide section, to the frame, and at an inner end, which forms a connecting section, to the hub seat. The directional-guide section has an area larger than that of the connecting section, so that the fluid control elements are adapted to control a flow direction of the fluid flown out of the outlet of the frame.

Abstract: An outlet airflow direction control device mainly includes a frame and a fan. The frame has an inlet and an outlet via which an amount of fluid flows into and out of the frame, and is internally provided at a predetermined position with a hub seat. The hub seat is provided on a peripheral wall with a plurality of radially projected fluid control elements. The fan is mounted on the hub seat in the frame. When the fan is rotated to cause an amount of fluid to flow through the outlet of the frame, the fluid control elements are adapted to control a flow direction of the fluid flown out of the outlet.

Abstract: An outlet airflow direction control unit mainly includes a frame and a fan mounted in the frame. The frame has an inlet and an outlet via which an amount of fluid flows into and out of the frame, and is internally provided at predetermined positions with a plurality of radially projected fluid control elements. When the fan is rotated to cause an amount of fluid to flow through the outlet of the frame, the fluid control elements provided in the frame are adapted to control a flow direction of the fluid flown out of the outlet.

Abstract: The present heat dissipation device is provided with a fan frame and a blade structure. The fan frame includes an air inlet, an air outlet, and a curved portion. The air inlet has a non-circular indentation in the vicinity of the curved portion corresponding to the airflow passage. This indentation effectively increases the airflow amount and static pressure of the airflow expelled from the heat dissipation device.

Abstract: The heat dissipation device includes a frame and an impeller. The frame has an inlet and an outlet, in which the inlet has a noncircular shape. The inlet can be provided with a blocking board so as to be noncircular. The blocking board suppresses airflow dissipated from a high pressure region of the airflow path in order to enhance outgoing airflow.

Abstract: The present heat dissipation device is provided with a fan frame and a blade structure. The fan frame includes an air inlet, an air outlet, and a curved portion. The air inlet has a non-circular indentation in the vicinity of the curved portion corresponding to the airflow passage. This indentation effectively increases the airflow amount and static pressure of the airflow expelled from the heat dissipation device.

Abstract: The present heat dissipation device is provided with a fan frame and a blade structure. The fan frame includes an air inlet, an air outlet, and a curved portion. The air inlet has a non-circular indentation in the vicinity of the curved portion corresponding to the airflow passage. This indentation effectively increases the airflow amount and static pressure of the airflow expelled from the heat dissipation device.

Abstract: The centrifugal fan of the present invention comprises a frame, a rotatory means and an impeller. Among these, the frame has a first intake, a second intake, at least one air outlet and a plurality of ribs crossing the second intake. The rotatory means mounted in the frame. The impeller further includes a hub, a partition, a plurality of first blades and a plurality of second blades. The hub is coupled to the motor. The partition separates the inlet air of the first intake and that of the second intake so as to reduce the noise caused by the disturbance. A plurality of first blades and second blades are formed on the first surface and the second of the impeller, respectively. Each of the first blades and second blades selectively include a cut corner formed thereon. The second blade and said rib forms an intersection angle of about 90 degrees as the second blade crosses the rib.

Abstract: The present heat dissipation device is provided with a fan frame and a blade structure. The fan frame includes an air inlet, an air outlet, and a curved portion. The air inlet has a non-circular indentation in the vicinity of the curved portion corresponding to the airflow passage. This indentation effectively increases the airflow amount and static pressure of the airflow expelled from the heat dissipation device.

Abstract: The heat dissipation device includes a frame and an impeller. The frame has an inlet and an outlet, in which the inlet has a noncircular shape. The inlet can be provided with a blocking board so as to be noncircular. The blocking board suppresses airflow dissipated from a high pressure region of the airflow path in order to enhance outgoing airflow.

Abstract: The centrifugal fan of the present invention comprises a frame, a rotatory means and an impeller. Among these, the frame has a first intake, a second intake, at least one air outlet and a plurality of ribs crossing the second intake. The rotatory means mounted in the frame. The impeller further includes a hub, a partition, a plurality of first blades and a plurality of second blades. The hub is coupled to the motor. The partition separates the inlet air of the first intake and that of the second intake so as to reduce the noise caused by the disturbance. A plurality of first blades and second blades are formed on the first surface and the second of the impeller, respectively. Each of the first blades and second blades selectively include a cut corner formed thereon. The second blade and said rib forms an intersection angle of about 90 degrees as the second blade crosses the rib.