A replacement head for a vacuum device includes a plastic tray, a filter and a pad. The plastic tray includes a dust chamber that has a sealing surface and at least one opening. The opening is provided to allow air, dust and debris to be drawn into the dust chamber during use. The sealing surface defines a sealing surface plane and the opening defines an opening place. The relative angle between the sealing surface plane and the opening plane is preferably between about −20 degrees and +150 degrees. The pad is attached to the lower side of the plastic tray and is in contact with the floor during cleaning. The filter is connected to the plastic tray such that the filter substantially covers a top opening in the dust chamber.

A large bore mobile vacuum system is used with special large bore vacuum adapters to enable a method and system for cleaning ground tanks used to store wastewater. The ground tank cleaning method and system may be safer and more efficient that conventional methods by enabling a human operator to physically remain outside of the ground tank, while preventing the contents of the ground tank from being exposed to the environment during the ground tank cleaning.

Disclosed are a floor brush of a dust collector and a dust collector having same, the floor brush of a dust collector comprising: a main body, the main body defining an air channel therein and being provided with, on a lower surface at the front end thereof, a suction port in communication with the air channel, when the main body covers a surface to be cleaned, an air-tight space being formed between the air channel and the surface to be cleaned, and the front end of the main body being provided with a front air inlet port in communication with the air channel; and a flow guiding portion, the flow guiding portion being provided at the front end of the main body and being provided adjacent to the front air inlet port, and the flow guiding portion being provided with a flow guiding face so that the external air passes through the flow guiding face and the front air inlet port into the air channel.

A replacement head for a vacuum device includes a plastic tray, a filter and a pad. The plastic tray includes a dust chamber that has a sealing surface and at least one opening. The opening is provided to allow air, dust and debris to be drawn into the dust chamber during use. The sealing surface defines a sealing surface plane and the opening defines an opening place. The relative angle between the sealing surface plane and the opening plane is preferably between about 20 degrees and +150 degrees. The pad is attached to the lower side of the plastic tray and is in contact with the floor during cleaning. The filter is connected to the plastic tray such that the filter substantially covers a top opening in the dust chamber.

A replacement head for a vacuum device includes a plastic tray, a filter and a pad. The plastic tray includes a dust chamber, a first connector lip and a second connector lip. An opening is provided that allows air, dust and debris to be drawn into the dust chamber during use. The connector lips are provided for attachment to a vacuum device. The pad is attached to the lower side of the plastic tray and is in contact with the floor during cleaning. The filter is connected to the plastic tray such that the filter substantially covers a top opening in the dust chamber.

Apparatus and method for adjusting a height of a suction chamber of a vacuum cleaner relative to a target cleaning surface. The vacuum cleaner includes a compressible cleaning sheet, such that as a user selectively executes different motions and/or applies different forces to a handle of the vacuum cleaner, the cleaning sheet compresses or uncompresses, dynamically adjusting the height of the suction chamber.

Methods and apparatus for cleaning a surface with a cleaning device having a body with a handle, a connector, and one or more cleaning heads that are removably attached to the cleaning device are disclosed. Each cleaning head includes a lower surface arranged to contact a surface to be cleaned, a dirt collection chamber, and a pocket arranged to receive an insert of the connector to attach the cleaning head to the cleaning device. In some embodiments, the connector insert is pivotally connected to the connector. In some embodiments, the cleaning head includes a support structure and a cleaning sheet, with the pocket being formed between the support structure and the cleaning sheet.

A replacement head for a vacuum device includes a plastic tray, a filter and a pad. The plastic tray includes a dust chamber and a front guard portion. An opening is provided that allows air, dust and debris to be drawn into the dust chamber during use. The front guard portion preferably has at least a portion that has a triangular cross-sectional shape and defines an interior space. The pad is attached to the lower side of the plastic tray and is in contact with the floor during cleaning. The filter is connected to the plastic tray such that the filter substantially covers a top opening in the dust chamber.

A replacement head for a vacuum device includes a plastic tray, a filter and a pad. The plastic tray includes a dust chamber and a front guard portion. An opening is provided that allows air, dust and debris to be drawn into the dust chamber during use. The front guard portion preferably has at least a portion that has a triangular cross-sectional shape and defines an interior space. The pad is attached to the lower side of the plastic tray and is in contact with the floor during cleaning. The filter is connected to the plastic tray such that the filter substantially covers a top opening in the dust chamber.

A portable hard surface cleaning appliance is provided, including a suction nozzle having a suction opening at which at least one squeegee lip is arranged, an electrical device having a suction turbine in flow connection with the suction nozzle for suctioning a liquid air mixture from the suction opening, an electric motor, an electronic control system, at least one rechargeable battery, a separating device arranged in the flow path between the suction nozzle and the suction turbine for separating liquid from the suctioned liquid air mixture, and a liquid tank for receiving the separated liquid. The hard surface cleaning appliance includes an inner housing arrangement and an outer housing arrangement, wherein the inner housing arrangement accommodates the separating device and the electrical device, and the outer housing arrangement surrounds the inner housing arrangement.