1. An electronic device, comprising:a housing having a plurality of heat sinks disposed on an external surface of the housing; and
a fan, comprising:
a stator unit disposed inside the housing; and
a rotor unit disposed outside the housing corresponding to the stator unit, the rotor unit comprising a fan wheel, wherein the rotor unit is isolated from the stator unit by the housing, the fan wheel is disposed on the housing, and the fan wheel and the plurality of heat sinks are on the same side of the housing.