Device for a vacuum cleaner

A device according to any of the preceding claims characterized in that the screw (19) is rotated by an electric motor (21), a current or power demand of the electric motor being used to indicate the filling state of the collecting chamber (23).

A device according to any of the preceding claims characterized in that the particle separator comprises a mainly cylindrical chamber (10) in which the inlet (11) for the dust laden air is placed such that the air mainly flows in tangentially at a first end wall (12) of the chamber, whereas the particle outlet (16) is placed at the other end wall (17) of the chamber and that the outlet (14) for cleaned air is placed centrally in the cylindrical chamber.

A device according to any of the preceding claims characterized in that a sealing device (22) for a bag inserted into the collecting chamber (23) is placed between the screw conveyor (18, 19) and the collecting chamber (23).

A device according to any of the preceding claims characterized in that the screw conveyor is arranged such that an axial direction of the screw (19) is mainly parallel to or mainly perpendicular to an axial direction of the cylindrical chamber (10) of the particle separator.

A device according to any of the preceding claims characterized in that the collecting chamber (23) via a tube connection (25) communicates with the air flow to the vacuum source such that a pressure difference is established between the outside and the inside of a bag (24) inserted into the collecting chamber and in such a manner that the bag is sucked against the surrounding wall of the collecting chamber.