主权项 |
1. A heat dissipating fan comprising:
a housing including a base and a sidewall coupled to the base, with the sidewall defining a compartment of a generally cylindrical shape having an axis, with the housing further including an air inlet formed by open ends of the compartment, an air outlet extending in a radial direction from the compartment through the sidewall, and a dust channel extending in a radial direction from the compartment through the sidewall, with the air inlet, the air outlet and the dust channel being in communication with the compartment, with the air outlet including opposite first and second end edges in the sidewall parallel to and spaced from the axis, with the first and second end edges of the air outlet located at a same straight side of the housing, with the housing defining a first plane including the first and second end edges; an impeller including a hub extending along the axis and a plurality of blades coupled to an outer periphery of the hub, with the impeller defining a second plane including the axis of the hub, with the second plane parallel to and spaced from the first plane, with the compartment of the housing including an air outlet section and a pressure accumulating section on opposite sides of the second plane, with the air outlet section located between the first and second planes, with the air outlet located in the air outlet section and extending through the sidewall, with the dust channel located in the pressure accumulating section, with the impeller rotatable in a direction for heat dissipation purposes and rotatable in an opposite direction for dust removing purposes, and with the dust channel extending from the compartment in a tangential vector of the opposite direction; a stator coupled to the base of the housing, with the impeller rotatably coupled to the stator about the axis and located within the compartment; and a control element including a driving circuit electrically connected to the stator and a rotating direction control circuit electrically connected to the driving circuit. |