The present application discloses a flow guide cover and a server having the same. The flow guide cover includes an annular frame, a flow directing member, an air collecting ring, a plurality of first air guide vanes and a plurality of second air guide vanes. The flow directing member is arranged inside the annular frame and comprises a first surface and a second surface which are arranged opposite to each other, the first surface having an area greater than that of the second surface. The air collecting ring is arranged surrounding an outer periphery of the flow directing member, located between the flow directing member and the annular frame, and spaced apart from the flow directing member and the annular frame respectively. When the flow guide cover of the present application is used in conjunction with a fan, heat can be dissipated more evenly.

A cooling structure includes: a main body including a base, and heat dissipation fins and a protrusion that protrude from a heat dissipation surface; a lid member disposed to cover the protrusion and the fins and form a flow path; and a fan mechanism. The fan mechanism includes a vane portion, a driving portion that rotates the vane portion, and a conductive wire for supplying electric power to the driving portion. The protrusion includes a first through hole, and the base includes a second through hole communicating with the first through hole. The conductive wire includes a first portion connected to the driving portion and disposed between the lid member and the main body, and a second portion continuing from the first portion and inserted in the first through hole and the second through hole. The cooling structure enables enhancement of the heat dissipation and shielding performance.

An air pressure in fuel cells of an electric power generation system comprising a fuel cell stack (PCS) is raised with a pressurized air cooling system with recirculation to values at least two times greater than typical values for an PCS with air cooling. The FCS is either placed in a high-pressure chamber to which air is injected, or air outgoing from the FCS is redirected via a duct back to the FCS inlet and a portion of pressurized fresh air is added thereto. The chamber or the duct is provided with a radiator by means of which circulating air heat is transferred into the external environment. Air recirculation in the chamber or the duct is effected by means of fans for cooling fuel cells. Useful capacity of electric power generation systems based on fuel cells is raised significantly, the necessity of using a humidifier is excluded, and the temperature range of fuel cell operation is expanded.

The present utility model discloses a modular magnetic-type fan convenient for installation, which comprises a housing, a magnetic-type structure and an electrical-connection structure; the housing is surrounded by a plurality of side frames; the magnetic-type structure comprises a first magnetic part and a second magnetic part arranged on both side frames; the electrical-connection structure comprises a first electrical-connection part and a second electrical-connection part arranged on two side frames; the users can splice fans in accordance with their actual needs make the fan combinations more convenient and avoid messy electrical connection.

A fan system is used for dissipating heat of an electronic device. The fan system includes a fan, a hollow structure, and a control circuit. Sound waves made by the fan are transmitted to an interior of the hollow structure when the fan is operating. The control circuit is connected to the hollow structure and is configured to control deformation/deformations of the hollow structure according to a state/states of the fan and/or the electronic device, which change a volume of the interior of the hollow structure for making a resonance frequency of the hollow structure being approximate to a rotation speed of the fan or being the same as the rotation speed of the fan.

A heat sink faces an exhaust port of a blower fan in use, and includes: a first plate-shaped portion; a second plate-shaped portion disposed in parallel with the first plate-shaped portion having a gap therebetween; a plurality of fins that stand up between the first plate-shaped portion and the second plate-shaped portion and are disposed side by side with a gap therebetween to define an air flow path between the fins, through which air flows from the exhaust port; and a protrusion that is disposed at a part of each fin including a center of the upright height, and protrudes into the air flow path.

The present disclosure provides a fan module and a case including the fan module. The fan module includes a fan, a fan bracket and a traction structure. The fan bracket includes: a fixed bottom plate for carrying and fixing the fan; and a connection structure, connected to the fixed bottom plate and used for being connected to a case through plugging. The traction structure is mounted on the fan bracket, and is used for pulling the fan bracket from the inside of the case to the outside of the case. In the present disclosure, the fan module is plugged into the case, and is pulled to the outside of the case from the inside of the case through a traction interface. In this way, the fan maintenance is implemented without disassembling the case or cutting off the power, the maintenance efficiency is improved, and the maintenance cost is reduced.

A cable drum for supplying power to an electrically powered utility vehicle, with an axially running winding body which can be set in rotation about a rotational axis in order to wind up and unwind an electrical cable, wherein on an inside, the winding body carries a plurality of fans which are configured to generate a cooling air stream directed radially outward with respect to a cylindrical drum wall.

The disclosure provides a charger, a charging device, an energy supply device and a control method of the charger. The charger comprises a housing, a charging position, a charging port and a first heat dissipation unit. The charger comprises a base and a supporting part. The supporting part is arranged on the base. The charging position is arranged on the base and distributed around the supporting part. The charging port is arranged on the charging position and matched with a battery pack. The first heat dissipation unit is arranged on the supporting part for heat dissipation of the battery pack. With the charger of the disclosure, multiple battery packs can be charged at the same time.

A fan frame structure includes a base portion and a wall portion. The base portion has at least one extension section vertically extended from an outer peripheral edge of the base portion, and the extension section has connecting sides. The wall portion is formed along the outer peripheral edge of the base portion through an insert molding process. The wall portion includes a plurality of wall segments connected to the connecting sides of the extension sections, and a clearance is formed between any two adjacent wall segments. With these arrangements, the base portion can better resist a wrapping force from the insert-molded wall portion to avoid deformation.