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.

The present invention discloses a backpack vacuum cleaner, which includes a dust collection part, a base part, a vacuum electric fan and an air pressure alarm unit. The vacuum electric fan introduces dust-containing airflow into a dust collection bag from a dust inlet and guides air entering an exhaust space to an exhaust port. An air pressure detection element arranged in the tank detects the pressure in the exhaust space. The alarm sends an alarm signal to the outside and can decide whether to give an alarm to the outside based on a detection result of the air pressure detection element.

A bag-based filtering device for collecting debris from a cleaning robot via a debris evacuation station includes a filter bag configured to separate at least the portion of the evacuated debris from a flow of air generated by the evacuation station. The filtering device includes a conduit extending inward from an opening of the filter bag into the receptacle. The conduit is configured to pneumatically connect a receptacle of the filtering device with an inlet of the filtering device to direct the flow of air generated by the evacuation station through the filter bag to separate at least the portion of the evacuated debris from the flow of air.

Disclosed is a central vacuum system. The central vacuum system comprises a first vacuum device, a second vacuum device, and a hose connected between the first vacuum device and the second vacuum device; the first vacuum device and the second vacuum are controlled by a linked switch, interior of the hose remains positive or slightly negative pressure. A self-operated differential pressure regulating valve arranged at the end of the hose is capable of generating corresponding air resistance under different airflow rate so as to maintain the interior pressure of the hose at a stable slightly positive or negative pressure.

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 filter can receive timely maintenance. A dust collection system includes a hammer drill, a dust collection attachment connected to the hammer drill and including a dust collection motor that generates a suction force and a filter that catches sucked dust, and a dust collection controller that monitors a state of the dust collection attachment to determine a time to perform maintenance.

An evacuation station includes a base and a canister removably attached to the base. The base includes a ramp having an inclined surface for receiving a robotic cleaner having a debris bin. The ramp defines an evacuation intake opening arranged to pneumatically interface with the debris bin. The base also includes a first conduit portion pneumatically connected to the evacuation intake opening, an air mover having an inlet and an exhaust, and a particle filter pneumatically the exhaust of the air mover. The canister includes a second conduit portion arranged to pneumatically interface with the first conduit portion to form a pneumatic debris intake conduit, an exhaust conduit arranged to pneumatically connect to the inlet of the air mover when the canister is attached to the base, and a separator in pneumatic communication with the second conduit portion.

A backpack dust collector includes a housing and a filter. The housing includes a suction port, a dust collecting chamber connected to the suction port and accommodating a dust collecting bag, a motor chamber connected to the dust collecting chamber and accommodating a fan and a motor, and an exhaust port through which air from the motor chamber is discharged. The filter is disposed on a side of the dust collecting chamber so as to face the dust collecting chamber.

An autonomous cleaning robot includes a drive operable to move the autonomous cleaning robot across a floor surface; a cleaning assembly configured to clean the floor surface; a receiver configured to receive an indication of cat activity in a cat box; and a controller configured to navigate the autonomous cleaning robot to the cat box to execute a cleaning mission in response to the received indication of cat activity.

An autonomous electrical cleaning apparatus including: an electric blower that generates suction negative pressure on a suction port; a rotating brush disposed at the suction port; a rotating brush driver that drives the rotating brush; a drive wheel that supports a cleaner body, driven by a drive wheel driver, a cleaning-target-surface detector that detects the surface type to be cleaned; and a robot controller that adjusts a controlled variable for any of the suction negative pressure, speed of the rotating brush, rotation direction of the rotating brush, and speed of the drive wheel, based on the surface type to be cleaned. The cleaning-target-surface detector detects the surface type be cleaned at a detection position ahead of the element for which the controlled variable is to be adjusted, and the robot controller adjusts the controlled variable when the element for which the controlled variable is to be changed reaches the detection position.