Abstract: A suction device for dental, medical and industrial purposes with a radial fan with a suction side and a delivery side. An air outlet of a centrifugal separator is connected to the suction side of the fan. At least one drive motor controlled by a control unit, and in the form of a rotating electric motor, drives the fan and the separator. A fan drive motor and a separator drive motor are arranged, uncoupled in terms of rotation, one behind the other on a common shaft fixed to the housing. The respective stators are supported by the common shaft. The rotating parts of the fan are connected to the rotor of the fan drive motor, and the rotating parts of the separator are connected to the rotor of the separator drive motor and are mounted to rotate coaxially with respect to the shaft fixed to the housing.

Abstract: A suction device for dental, medical and industrial purposes is described which includes a radial fan with a suction side and a delivery side. An air outlet of a centrifugal separator is connected to the suction side of the radial fan. At least one drive motor controlled by a control unit, and in the form of a rotating electric motor, drives the radial fan and the centrifugal separator. A fan drive motor and a separator drive motor are arranged, uncoupled in terms of rotation, one behind the other on a common shaft fixed to the housing. The respective stators are supported by the common shaft. The rotating parts of the radial fan are fixedly connected to the rotor of the fan drive motor, and the rotating parts of the centrifugal separator are fixedly connected to the rotor of the separator drive motor and are mounted so as to rotate coaxially with respect to the shaft fixed to the housing.

Abstract: A suction machine intended for a dental or surgical suction installation is specified that includes a separating unit, which contains a rotor and is used to separate liquid and if appropriate solid constituents from a suctioned mixture of air, liquid and if appropriate solids, and a suction fan, which is connected to an air outlet of the separating unit and has a housing and an impeller. The suction fan is designed as a radial fan whose impeller is driven by an electrically commuted electric motor, which drives the rotor of the separating unit via a gearing.