SUCTION DEVICE WITH THROTTLE VALVE AND METHOD FOR CLEANING A FILTER IN SUCH A SUCTION DEVICE

The present invention relates to a suction device with a dirt collection container, a filter and a suction motor, wherein, in a suction operation of the suction device, a suction flow which flows from the dirt collection container through the filter in the direction of the suction motor is generated by means of the suction motor. The suction device is designed to perform a cleaning of the filter during continued suction operation of the suction device by generating a backflush flow R from a clean side of the filter towards a dirty side of the filter. The suction device comprises a throttle valve, wherein the throttle valve is provided on a dirty side of the filter and is designed to throttle the suction flow S so that the backflush flow R is increased by the throttling of the suction flow S. In a second aspect, the invention relates to a method for cleaning a filter in a proposed suction device, wherein filter cleaning is carried out during continued suction operation of the suction device by generating a backflush flow from a clean side of the filter towards a dirty side of the filter, wherein a throttling of the suction flow by a throttle valve leads to an increase in the backflush flow. The throttle valve can advantageously be used to adjust the cross-section of a flow channel in the suction device and/or the pressure on a dirty side of a filter of the suction device.