Abstract: An air duct defines a first air vent and a second air vent at opposite ends thereof, respectively. The air duct includes a duct body and a movable plate. The duct body defines a through opening in a side thereof. The through hole intercommunicates an interior and an exterior of the air duct. The movable plate is mounted on the side of the duct body adjacent to the through opening. By moving the movable plate, the through opening can be changed between an open state and a closed state freely. An electronic device incorporating the air duct is also provided.

Abstract: A computer system includes a chassis, a motherboard, a backplane, riser cards, and disk drives. The chassis includes a bottom wall. The motherboard is secured to and parallel to the bottom wall. The backplane is secured to the bottom wall, and electrically connected to and parallel to the motherboard. The riser cards are electrically and perpendicularly connected to the backplane. The disk drives are electrically connected to the riser cards.

Abstract: An exemplary data center includes two server systems arranged back to back. Each server system includes a server cabinet, a rail system, at least two servers and a fan module. The servers are accommodated in the server cabinet. The fan module is located at a rear side of the two servers and perpendicular to the servers to provide a horizontal airflow to cool the servers. The fan module is capable of rolling on the rail system between a rear side and a front side of the server cabinet to interchange between a vertical state and a horizontal state. Assembly or disassembly of the fan module is performed from the front side of the server cabinet where there is a greater amount of workspace.

Abstract: An electronic device includes a computer server and an energy recycling system. The computer server includes a frame, at least one fan, and a heat source both are received in the frame. The frame includes a first sidewall with a plurality of vents formed thereon. The fan defines an air inlet facing the heat source, and an air outlet facing the first sidewall and substantially aligned with the vents. The energy recycling system includes a rotation assembly and an electric generator. The rotation assembly includes a rotation shaft and a plurality of driven members formed on the rotation shaft. The rotation assembly is arranged in front of the first sidewall. The driven members are driven by the airflow to rotate the rotation shaft. The rotation shaft is connected to the electric generator configured for converting the rotation of the rotation shaft into electrical energy.

Abstract: A heat sink type module includes a mounting seat and a heat sink. The mounting seat includes a supporting plate, and two substantially parallel first side plates extending up from opposite first sides of the supporting plate. A latch protrudes from an inner surface of each first side plate. A heat sink includes a base plate and fins extending up from a top surface of the base plate. The base plate includes two substantially parallel first sides. The latches of the first side plates latch the first sides of the base plate to fix the heat sink.

Abstract: An exemplary self-cleaning computer includes an enclosure defining an air inlet therein, a control processing unit (CPU) received in the enclosure, a vibration element mounted on the enclosure, and a control device electrically connected between the CPU and the vibration element. The control device is configured to direct the vibration element to vibrate when the computer is in a particular predefined state, and thereby the enclosure is agitated and clogged dust dislodges therefrom.

Abstract: A fan module for dissipating heat from a computer server includes a mounting bracket and a fan mounted on the mounting bracket. The mounting bracket is mounted to an outside of the computer server. The mounting bracket is hollow and forms an air passage in an interior of the mounting bracket. The air passage is communicated with an interior of the computer server. An airflow generated by the fan flows into the interior of the computer server through the air passage to take heat away from the interior of the computer server.

Abstract: An air duct defines a first air vent and a second air vent at opposite ends thereof, respectively. The air duct includes a duct body and a movable plate. The duct body defines a through opening in a side thereof. The through hole intercommunicates an interior and an exterior of the air duct. The movable plate is mounted on the side of the duct body adjacent to the through opening. By moving the movable plate, the through opening can be changed between an open state and a closed state freely. An electronic device incorporating the air duct is also provided.

Abstract: An exemplary electronic device includes a circuit board, an air duct and a cooling fan. The circuit board includes a first electronic component and a second electronic component formed thereon. The air duct defines a first air vent and a second air vent at opposite ends thereof. The cooling fan is located on the circuit board and faces the second air vent. The first electronic component is disposed in the air duct. The second electronic component is disposed outside the air duct and adjacent to the air duct. The air duct defines an opening therethrough corresponding to the second electronic component.

Abstract: An exemplary self-cleaning computer includes an enclosure defining an air inlet therein, a control processing unit (CPU) received in the enclosure, a vibration element mounted on the enclosure, and a control device electrically connected between the CPU and the vibration element. The control device is configured to direct the vibration element to vibrate when the computer is in a particular predefined state, and thereby the enclosure is agitated and clogged dust dislodges therefrom.

Abstract: A heat sink type module includes a mounting seat and a heat sink. The mounting seat includes a supporting plate, and two substantially parallel first side plates extending up from opposite first sides of the supporting plate. A latch protrudes from an inner surface of each first side plate. A heat sink includes a base plate and fins extending up from a top surface of the base plate. The base plate includes two substantially parallel first sides. The latches of the first side plates latch the first sides of the base plate to fix the heat sink.

Abstract: An electronic device includes a server, a plurality of fans, a fan holder attached to one outer side of the server and a plurality of fan ducts received in the fan holder. The server defines an inner cavity therein. Each fan is centrifugal fan and has a fan intake and a fan outlet perpendicular to the fan intake. The fan holder accommodates the fans therein. Each fan duct has an inlet communicating with the fan outlet and an outlet communicating with the inner cavity of the server through the fan holder to allow airflow from the fans into the server.

Abstract: A computer system includes a chassis, a motherboard, a backplane, riser cards, and disk drives. The chassis includes a bottom wall. The motherboard is secured to and parallel to the bottom wall. The backplane is secured to the bottom wall, and electrically connected to and parallel to the motherboard. The riser cards are electrically and perpendicularly connected to the backplane. The disk drives are electrically connected to the riser cards.

Abstract: An electronic device includes a computer server and an energy recycling system. The computer server includes a frame, at least one fan, and a heat source both are received in the frame. The frame includes a first sidewall with a plurality of vents formed thereon. The fan defines an air inlet facing the heat source, and an air outlet facing the first sidewall and substantially aligned with the vents. The energy recycling system includes a rotation assembly and an electric generator. The rotation assembly includes a rotation shaft and a plurality of driven members formed on the rotation shaft. The rotation assembly is arranged in front of the first sidewall. The driven members are driven by the airflow to rotate the rotation shaft. The rotation shaft is connected to the electric generator configured for converting the rotation of the rotation shaft into electrical energy.

Abstract: An electronic device includes a first and a second air passages. A first and a second electronic components locate in the first and second air passages, respectively. A first heat sink includes a first heat dissipation portion contacting the first electronic component and located in the first air passage and a second heat dissipation portion located in the second air passage. A second heat sink includes a first heat dissipation portion contacting the second electronic component and located in the second air passage and a second heat dissipation portion located in the first air passage. The first heat dissipation portion of the first heat sink aligns with the second heat dissipation portion of the second heat sink and the second heat dissipation portion of the first heat sink aligns with the first heat dissipation portion of the second heat sink along a flowing direction of the t air passage.

Abstract: A fastener includes a push pin, a plug and an elastic member. The push pin includes a head, a shaft extending from the head, and a clipping foot extending radially from the shaft. Two through receiving holes are defined in the head. A snapping hole is defined in the head and communicates with the receiving holes. The shaft and the clipping foot are between the receiving holes. The plug includes a handle, and two insertion portions extending from the handle. A raised point extends from each of the insertion portions. The insertion portions of the plug can extend through the receiving holes respectively until the raised points are snapped in the snapping hole and the insertion portions extend adjacent to the clipping foot. The elastic member can engage with the push pin to supply an elastic force pointing from the clipping foot to the head to the push pin.

Abstract: An exemplary data center includes two server systems arranged back to back. Each server system includes a server cabinet, a rail system, at least two servers and a fan module. The servers are accommodated in the server cabinet. The fan module is located at a rear side of the two servers and perpendicular to the servers to provide a horizontal airflow to cool the servers. The fan module is capable of rolling on the rail system between a rear side and a front side of the server cabinet to interchange between a vertical state and a horizontal state. Assembly or disassembly of the fan module is performed from the front side of the server cabinet where there is a greater amount of workspace.

Abstract: An exemplary fan module a main fan and an assist fan. The main fan includes a rotor. The rotor of the main fan includes a hub and a plurality of blades around the hub. The assist fan is located below the hub of the main fan. The assist fan includes a rotor. The rotor of the assist fan includes a shaft and a plurality of blades around the shaft. The shaft of the assist fan is fixed on the hub of the main fan. The rotor of the assist fan is driven to rotate by the main fan, and therefore produces airflow towards a central portion of a heat sink.

Abstract: A fan module for dissipating heat from a computer server includes a mounting bracket and a fan mounted on the mounting bracket. The mounting bracket is mounted to an outside of the computer server. The mounting bracket is hollow and forms an air passage in an interior of the mounting bracket. The air passage is communicated with an interior of the computer server. An airflow generated by the fan flows into the interior of the computer server through the air passage to take heat away from the interior of the computer server.

Abstract: An exemplary fan module includes a main fan and an assist fan. The main and assist fans each include a rotor which includes a hub and a plurality of blades around the hub. The assist fan is located below the hub of the main fan. Inner sides of the blades of the assist fan adjacent to the hub of the assist fan are located within a range of a radius of the hub of the main fan along a radial direction of the rotor of the main fan. Outer sides of the blades of the assist fan away from the hub of the assist fan are located beyond the hub of the main fan along the radial direction of the rotor of the main fan. The blades of the assist fan are pushed to rotate by airflow from the main fan to produce airflow towards a heat sink.