A handheld electric vacuum configured to perform sucking work includes: a pipe including a suction port at one end and a discharge port at the other end; a blower provided outside the pipe and driven by an electric motor; a handle provided outside the pipe and near the discharge port in a longitudinal direction of the pipe, and configured to be held by a hand; and an ejector provided near the suction port in the longitudinal direction of the pipe, and configured to feed pressurized wind generated by the blower into the pipe from around the pipe, and to eject the pressurized wind to the discharge port.

An electrostatic protection system for hand-held wireless vacuum cleaner comprises an electrostatic collecting unit and an electrostatic dissipating unit. The electrostatic collecting unit comprises an electrostatic collecting device; the electrostatic dissipating unit comprises a battery pack assembly, and the electrostatic collecting device is electrically connected to a negative electrode of the battery pack assembly. The electrostatic collecting unit is electrically connected to the electrostatic dissipating unit, and an electrostatic charge is transmitted to the negative electrode of the battery pack assembly through the electrostatic collecting device to realize electrostatic charge transfer. The electrostatic protection system effectively transfers the accumulated electrostatic charge, thereby avoiding the phenomenon of electrostatic shock, e.g. on the human's hand, and also protecting important components inside a machine from electrostatic damage.

Embodiments of a unified airflow system for ultraviolet disinfection devices are disclosed. One embodiment of the present disclosure includes a unified airflow assembly and a control unit. The unified airflow assembly provides a shared airflow passage between a UV source and an airflow accessory capable of extracting contaminants from a target surface using a suction airstream. The UV source may be fluidically disconnected from the airflow accessory. The unified airflow assembly may include at least one air restriction unit in the shared airflow passage for manipulating a suction airstream therein. The control unit may be configured to drive the at least one air restriction unit to restrict the suction airstream to only one of the UV source and the airflow accessory.

A vacuum cleaner including a vacuum motor configured to draw an air flow through an air flow path of the vacuum cleaner; a dirt separator having dirt, receptacle; a display screen; and a controller configured to control images displayed on the screen. The dirt receptacle has a closed configuration in which it can receive dirt separated from the air flow, and an open configuration in which dirt contained in the dirt receptacle can be emptied therefrom. The controller is configured to display video instructions on the screen.

A connection device for the fluidic connection of a suction tube to a function unit. The connection device includes a first hollow-cylindrical connection section and a second hollow-cylindrical connection section. One of the connection sections is connectable or connected to the suction tube and the other connection section is connectable or connected to the function unit. One of the connection sections is located at least partly within the other connection section and with its outer periphery bears on the inner periphery of the other connection section, where the two connection sections are rotatably mounted, in order to provide a rotation compensation for the suction tube, and where an electrical connection for providing an antistatic function exists between the two connection sections. The first connection section includes a spring section which is deformable in the radial direction and with which the bearing contact on the second connection element takes place.

A vacuum cleaner assembly and vacuum cleaner with a vacuum cleaner assembly, including a suction device with a basic body with a first end with at least one suction inlet for connection with a suction tube and/or suction hose of the vacuum cleaner. Furthermore, the basic body divides at a second end into two substantially tubular suction ducts, each having a suction intake, wherein one suction arm each is associated with the suction intakes, and wherein the suction arms are provided pivotable about the associated suction duct.

The invention relates to a relief valve (100) for portable, industrial dust collectors. It has actuating means (102, 104) for actuating the valve (100) between a closed position and an open position. According to the invention, the valve further includes retaining means (107) for maintaining the valve in the open position. The invention also relates to a hose device for a cleaner of a dust collector a dust collector. The hose device is arranged such that it covers the bottom of the grid means in the cleaner when the dust collector operates and falls down when the vacuum in the dust collector is released. The invention further relates to a cleaner, to a dust collector, to a grinding machine and to a method for operating a dust collector. These are in conjunction with the relief valve and/or the hose device. The invention also relates to a dust collector with cleaner means (1, 2), a relief valve (100, 400) and an inlet valve (12) and synchronization means arranged to govern that the actuation of the inlet valve (100, 400) is synchronized with actuation of the relief valve (12).

The present disclosure relates to a cleaner improving the cleaning efficiency. The cleaner includes a main body, a suction device configured to suck foreign substances on a surface to be cleaned, and an extension member positioned in the rear of the suction device to connect the main body and the suction device, wherein the suction device includes a suction head including a suction port, a connection member connecting the suction head and the extension member, and a weight accommodated in the suction device and disposed between the suction port and the extension member such that the suction port is prevented from being lifted from the surface to be cleaned when the suction device moves along the surface to be cleaned.

A vacuum cleaner comprising a fan driven by a motor, wherein the fan is configured to accomplish a suction flow from a vacuum cleaner nozzle via a hand-held tube having a direction of elongation, to a permeable dust collecting container. A sensing device is provided, sensing strain in the tube along its elongate direction, and a control arrangement controls the output of the motor in response to the sensed strain. This allows the vacuum cleaner to adapt to different floor surfaces.

Vacuum cleaner, comprising a tube having a first diameter, a hose having a second diameter exceeding the first diameter by at least 15%, and a transition piece (T) having a first end (1) arranged for being connected to the tube, and a second end (2) arranged for being connected to the hose, wherein the transition piece (T) has a curved part that has a non- circular cross-section, the curved part having a first part (I) in which in a direction from the first end (1) to the second end (2), a first dimension (R1) of the cross-section increases to a diameter exceeding the first diameter by 15%, the first dimension (R1) being in a radial direction of the curved part, while a second dimension (R2) of the cross-section, perpendicular to the first dimension (R1), does not exceed the first diameter by more than 10%. Preferably, the transition piece (T) has a second part (II), between the first part (I) and the second end (2), the second part (II) having a non-circular cross-section where the second part (II) meets the first part (I), and a circular cross-section where the second part meets the second end (2). Advantageously, in the first part (I), in a direction from the first end (1) to the second end (2), the first dimension (R1) of the cross-section increases to a diameter exceeding the second diameter, while the second dimension (R2) stays below the second diameter.