A grout cleaning assembly includes a housing that has a handle portion and a suction portion. A scrubbing unit is rotatably attached to the housing and the scrubbing unit is positioned on the suction portion. Thus, the scrubbing unit scrubs a grout from a support surface. A first port is coupled to the handle portion. The first port may be fluidly coupled to a fluid source thereby facilitating the first port to directing a fluid onto the scrubbing unit. A second port is coupled to the handle portion. The second port may be fluidly coupled to a vacuum thereby facilitating the second port to suctionally urge the fluid and the grout into the vacuum when the scrubbing unit scrubs the grout from the support surface.

A substrate cleaning apparatus that brings a cleaning tool into sliding contact with a substrate surface while rotating the substrate to perform scrub-cleaning includes a cleaning liquid supply unit that ejects cleaning liquid onto the surface of the substrate to perform a rinsing process of the substrate after scrub-cleaning, in which a temperature of the cleaning liquid in the rinsing process is set to 0 C. to 20 C. The cleaning liquid supply unit includes a first cleaning liquid supply unit that supplies the cleaning liquid toward the vicinity of the center of the substrate and a second cleaning liquid supply unit that supplies the cleaning liquid in a spray form toward a region between the center and an edge of the substrate, and a first ejection angle by the first cleaning liquid supply unit is smaller than a second ejection angle by the second cleaning liquid supply unit.

A substrate cleaning apparatus that brings a cleaning tool into sliding contact with a substrate surface while rotating the substrate to perform scrub-cleaning includes a cleaning liquid supply unit that ejects cleaning liquid onto the surface of the substrate to perform a rinsing process of the substrate after scrub-cleaning, in which a temperature of the cleaning liquid in the rinsing process is set to 0 C. to 20 C. The cleaning liquid supply unit includes a first cleaning liquid supply unit that supplies the cleaning liquid toward the vicinity of the center of the substrate and a second cleaning liquid supply unit that supplies the cleaning liquid in a spray form toward a region between the center and an edge of the substrate, and a first ejection angle by the first cleaning liquid supply unit is smaller than a second ejection angle by the second cleaning liquid supply unit.

An autonomous solar collector cleaning device includes at least one main shaft, a first driver attached to a first end of the at least one main shaft, and a second driver attached to a second end of the at least one main shaft. The first and second drivers propel the cleaning device along a surface of the solar collector. A first sensor is attached to the first driver to detect an edge of the solar collector, and a second sensor is attached to the second driver to detect the edge of the solar collector. A control circuit maintains alignment of the cleaning device with respect to the solar collector based on outputs from the first and second sensors.

A rotatable grinding tool (1) comprising a disc-like body (2) defining an intended direction of rotation (D), in which the grinding tool (1) is rotatable about a central axis (A) of the disc-like body (2), and a front side (3) intended to face a surface to be grinded, and a back side (4) opposite to the front side. The grinding tool (1) further comprises, on the front side (3) of the body (2), a plurality of teeth (5) each extending radially along said front side (3), wherein said teeth (5) being arranged spaced apart from each other. Particularly, the teeth (5) are formed integral with the body (2).

An auger cleaning apparatus for the removal of debris and drilling substrate from the helical blades of an auger, the apparatus comprising two half-cylinder sections attaching by a hinge which encircle the outer perimeter of the auger, the two half cylinders forming a full cylinder, with at least one scraper directed to an inner cavity within the full cylinder, each scraper fitting within the voids between the threaded helical blade, scraping the debris and drilling substrate from the auger blade, each scraper extending between the spaces within the helical auger blade expelling the removed debris from the inner cavity through a respective evacuation port outside of the auger cleaning apparatus.

Provided is a self-propelled cleaning robot that can efficiently perform cleaning even on a flat surface having a gap or a step. A self-propelled cleaning robot (1) that self-travels on and cleans a flat surface (SF) of a structure, a groove (G) being formed in the flat surface (SF), the self-propelled cleaning robot (1) includes a robot main body (2) in which a self-propelled moving means (4) is provided and a guidance unit (40) that guides movement of the robot main body (2). At this point, the guidance unit (40) includes: a shaft member (43) that is provided so as to be detachably inserted in the groove (G) and a shaft member moving mechanism (45) that controls insertion and removal of the shaft member (43) with respect to the groove (G). The robot main body (2) is provided so as to be turnable about the shaft member (43) in a state in which the shaft member (43) of the guidance unit (40) is inserted in the groove.

An anti-falling mechanism, configured and adapted on a photovoltaic panel cleaning equipment for cleaning photovoltaic panels, is provided. The photovoltaic panel cleaning equipment includes a body and a cleaning rack, in which the anti-falling mechanism is being mounted on. The cleaning rack includes several connecting rods which are detachably connected. The anti-falling mechanism includes a first hook and a second hook, each of the first hook and the second hook comprises a fixed part and an anti-falling part, the fixed part is fixedly connected with the anti-falling part and the fixed part is detachably mounted on the first connecting rod. By adopting the anti-falling mechanism, the body of the photovoltaic panel cleaning equipment can be prevented from falling off from the photovoltaic panels during cleaning process of the photovoltaic panels.

A method and device for cleaning and pretreating solar panels is provided. The device comprises a brush having cleaning elements made from silicone foam rubber material. The cleaning elements can be flaps of silicone foam rubber material. A sheet of silicone foam rubber material having two free ends can be attached to a core member such that the two free ends extend away from the core member to form flaps. The solar panels can be cleaned by brushing the solar panel surfaces with the flaps of silicone foam rubber material. The solar panels can also be pretreated by brushing the solar panel surfaces with silicone foam rubber material.

A liquid ejecting apparatus in which a cleaning performance with respect to a transport belt is improved while suppressing a rise in cost of the apparatus is provided. A liquid ejecting apparatus is provided with a transport belt which transports a recording medium, and a cleaning unit which cleans the transport belt. The cleaning unit can move between a cleaning position and an evacuation position, and is positioned at the cleaning position using positioning pins which are provided in a frame unit as a housing, and a groove portion which is provided in the cleaning unit.