A filter arrangement (200, 300, 400, 450) for a heavy duty dust extractor (100), the filter arrangement comprising a filter holder (180), an essential filter (150), a filter inlet (250), a filter outlet (260), a first air pressure sensor (310) and a second air pressure sensor (320), wherein the first air pressure sensor (310) is arranged to indicate an inlet air pressure (P3) associated with the filter inlet (250) and the second air pressure sensor (320) is arranged to indicate an outlet air pressure (P4) associated with the filter outlet (260), the filter arrangement further comprising a control unit (170) arranged to detect a state of the essential filter (150) based on a pressure difference between the inlet air pressure (P3) and the outlet air pressure (P4).

A filter arrangement (200, 300, 400, 450) for a heavy duty dust extractor (100), the filter arrangement comprising a filter holder (180), an essential filter (150), a filter inlet (250), a filter outlet (260), a first air pressure sensor (310) and a second air pressure sensor (320), wherein the first air pressure sensor (310) is arranged to indicate an inlet air pressure (P3) associated with the filter inlet (250) and the second air pressure sensor (320) is arranged to indicate an outlet air pressure (P4) associated with the filter outlet (260), the filter arrangement further comprising a control unit (170) arranged to detect a state of the essential filter (150) based on a pressure difference between the inlet air pressure (P3) and the outlet air pressure (P4).

Dust collection equipment, a method and apparatus for handling an air duct exception of the dust collection equipment are provided. The method includes: receiving an air pressure value detected by an air pressure sensor, wherein the air pressure sensor is located in an air path between a blower and a dust filtering apparatus of the dust collection equipment; determining whether an abnormal event occurs in an air duct of the dust collection equipment according to the air pressure value detected in real time; and performing corresponding handling according to the type of the abnormal event, when it is determined that the abnormal event occurs.

Dust collection equipment, a method and apparatus for handling an air duct exception of the dust collection equipment are provided. The method includes: receiving an air pressure value detected by an air pressure sensor, wherein the air pressure sensor is located in an air path between a blower and a dust filtering apparatus of the dust collection equipment; determining whether an abnormal event occurs in an air duct of the dust collection equipment according to the air pressure value detected in real time; and performing corresponding handling according to the type of the abnormal event, when it is determined that the abnormal event occurs.

Industrial vacuum cleaner configured for servicing at least one construction tool, said vacuum cleaner comprising a vacuum inlet, wherein said vacuum cleaner further comprises a controller and connected to said controller a wireless transceiver, a memory, and at least one location and/or orientation sensor configured for detection of vacuum cleaner location and/or localization of other objects in relation to the vacuum cleaner and wherein the vacuum cleaner further comprises means for propulsion controlled by said controller.

Industrial vacuum cleaner configured for servicing at least one construction tool, said vacuum cleaner comprising a vacuum inlet, wherein said vacuum cleaner further comprises a controller and connected to said controller a wireless transceiver, a memory, and at least one location and/or orientation sensor configured for detection of vacuum cleaner location and/or localization of other objects in relation to the vacuum cleaner and wherein the vacuum cleaner further comprises means for propulsion controlled by said controller.

Vacuum cleaner consisting of a dust container (1) and filters (2) within this, and above these a control space (3) for air and in the control space control housings (3a, 3b, 3c, 3d) and above these the central housing (4) and the underpressure space, and above this the suction unit (5) and the suction unit engine (6), all the units (1, 3, 4, 5) being in mutual communication. The control space (3) contains control valves (7, 8) for the air flow, by means of which, in normal use, the air flow is directed through the suction opening (9) in the dust container (1) to the exhaust air opening (10) in the suction unit (5) (arrows 9a, 9b, 9c) and the control valves comprise closing means, which, by opening the valve (7a) to the outside air and by closing the valve (8a) directs the air flow in the dust container in the filter under underpressure partly from the normal flow direction (9a, 9b, 9c) to the opposite flow direction (11).

Vacuum cleaner consisting of a dust container (1) and filters (2) within this, and above these a control space (3) for air and in the control space control housings (3a, 3b, 3c, 3d) and above these the central housing (4) and the underpressure space, and above this the suction unit (5) and the suction unit engine (6), all the units (1, 3, 4, 5) being in mutual communication. The control space (3) contains control valves (7, 8) for the air flow, by means of which, in normal use, the air flow is directed through the suction opening (9) in the dust container (1) to the exhaust air opening (10) in the suction unit (5) (arrows 9a, 9b, 9c) and the control valves comprise closing means, which, by opening the valve (7a) to the outside air and by closing the valve (8a) directs the air flow in the dust container in the filter under underpressure partly from the normal flow direction (9a, 9b, 9c) to the opposite flow direction (11).

A vacuum cleaner that includes a suction source configured to generate a suction airflow, a dirt collector in fluid communication with the suction source and configured to separate debris from the suction airflow and the dirt collector is configured to store the debris separated from the suction airflow. The vacuum further includes an infrared sensor operable to output a signal corresponding to a distance to an amount of debris stored in the dirt collector, a controller that receives the signal, and the controller is operable to determine a fill level stored in the dirt collector based on the signal. A visual display displays the fill level stored in the dirt collector.

A vacuum cleaner that includes a suction source configured to generate a suction airflow, a dirt collector in fluid communication with the suction source and configured to separate debris from the suction airflow and the dirt collector is configured to store the debris separated from the suction airflow. The vacuum further includes an infrared sensor operable to output a signal corresponding to a distance to an amount of debris stored in the dirt collector, a controller that receives the signal, and the controller is operable to determine a fill level stored in the dirt collector based on the signal. A visual display displays the fill level stored in the dirt collector.