Fan for an automatic dispensing device

A fan for an automatic dispensing device, wherein the fan is configured to generate an air flow when a rotor of the fan is rotating, the fan comprising:

• a drive circuit;
• an electromagnet having at least one electromagnetic coil, the electromagnetic coil connected to the drive circuit;
• a rotor for generating the airflow;
• and
• at least four magnets arranged on a circle on the rotor and spaced apart by the same angle (alpha);
• and
• the electromagnetic coil of the electromagnet is arranged above or under the circle of the rotor and configured to attract or repel said magnets;
• and
• the drive circuit is configured to switch a current direction in the electromagnetic coil of the electromagnet to sequentially attract and then repel each magnet as the rotor rotates;
• and
• a magnetic element arranged above or under the rotor in proximity of the circle of the rotor wherein the magnetic element is configured to attract one of the magnets to its position when the electromagnetic coil is not powered by the drive circuit and the rotor is not rotating or gradually coming to a halt after the electromagnetic coil has been un-powered, wherein none of the other magnets assumes a position directly under or above the electromagnetic coil of the electromagnet when the rotor comes to a halt;
• and
• the rotor comprises a rotation shaft, an end of which is suspended in an opening of structure, the first suspension magnet surrounding the said rotation shaft such that the rotation shaft can freely rotate in an opening of the first suspension magnet;
• and,
• a second suspension magnet is arranged at a distance from the first suspension magnet, the second suspension magnet surrounding the rotation shaft and is fixed to the rotation shaft such that the second suspension magnet rotates together with the rotation shaft when the rotor is rotating;
• and
• the test and second suspension magnets are configured to repel each other.