Abstract: A solar or photovoltaic system includes a cleaning apparatus for cleaning a surface of the solar or photovoltaic system. The surface to be cleaned is tilted or tiltable respect to the horizontal. The cleaning apparatus is configured to carry out a cleaning process to clean the surface in which at least one cleaning element moves downward over the tilted surface driven by gravity.

Abstract: An apparatus for cleaning a surface of solar collectors or photovoltaic installations includes at least one cleaning head that comprises at least one cleaning member. The cleaning member can be set into rotation. The apparatus also includes a movement device for moving the cleaning head over at least a part of the surface to be cleaned. The movement device has a first movement unit movable in a first direction and a second movement unit. The cleaning head is movable transversely or obliquely to the first movement direction by the second movement unit along a guide that is connected to the first movement unit. A drive device that is arranged at the first and/or second movement units makes it possible to automatically move the first movement unit in dependence on a position of the second movement unit.

Abstract: A solar or photovoltaic system comprises a cleaning apparatus for cleaning a surface of the solar or photovoltaic system, wherein the surface to be cleaned is tilted or tiltable respect to the horizontal. The cleaning apparatus is configured to carry out a cleaning process to clean the surface in which at least one cleaning element moves downward over the tilted surface driven by gravity.

Abstract: A rotor nozzle for high pressure cleaning devices, having a nozzle housing that has an inlet opening at its axially one end and an outlet opening for liquid at the other end, and having a rotor which is arranged in the nozzle housing, whose front end facing the outlet opening is supported at a bearing, which may be at least partly flowed through by the liquid, and which may be set into rotation by liquid flowing into the nozzle housing. wherein the bearing has at least two bearing sides and may be placed into the nozzle housing in at least two different orientations in which the rotor is respectively supported at another one of the bearing sides.

Abstract: The present invention relates to an apparatus for cleaning a surface, in particular at solar collectors or photovoltaic installations. The apparatus has at least one cleaning head that comprises at least one cleaning member. The cleaning member is in particular a brush that can be set into rotation. The apparatus furthermore has a movement device for moving the cleaning head over at least a part of the surface to be cleaned. The movement device has a first movement unit movable in a first direction and a second movement unit. The cleaning head is movable transversely or obliquely to the first movement direction by means of the second movement unit along a guide means that is connected to the first movement unit. A control means that is arranged at the first and/or second movement units makes it possible to automatically move the first movement unit in dependence on a position of the second movement unit.

Abstract: The invention relates to a discharge device for a cleaning fluid or treatment fluid, in particular to a lance for a high-pressure cleaner, comprising a pivotable head piece and an elongate holder which carries the head piece at its one end and is made at its other end for holding and for remotely controlled pivoting of the head piece, wherein the holder includes a carrier for the holding of the head piece and an actuation member adjustable relative to the carrier for the pivoting of the head piece relative to the carrier, and wherein the carrier and the actuation member extend up to the head piece in an at least approximately axially parallel arrangement, and in particular coaxial arrangement, with the carrier extending inside the actuation member.

Abstract: The invention relates to a rotor nozzle, in particular for high pressure cleaning devices, having a nozzle housing which has a swirl chamber between an inflow opening for a fluid, in particular water, and a discharge opening, with a rotor inclined with respect to a longitudinal axis during operation being supported at its front end at a bearing, in particular at a cup-shaped bearing, in said swirl chamber and with the rotor being able to be driven to make a rotating movement around the longitudinal axis by fluid flowing into the swirl chamber, wherein an adjustment device is positioned in front of the swirl chamber for the speed regulation of the rotor and forces the inflowing fluid to make a rotary movement around the longitudinal axis for the generation of a rotating fluid field before the transition into the swirl chamber, and wherein the rotating fluid field is disrupted more or less pronouncedly on the transition into the swirl chamber in dependence on the position of the adjustment device.

Abstract: The device relates to a rotor nozzle, in particular for high-pressure cleaning apparatus, comprising a nozzle housing which has an inlet opening at its one axial end and an outlet opening for liquid at the other end, also with a rotationally driven rotor arranged in a swirl chamber of the nozzle housing inclined relative to the longitudinal axis of the swirl chamber and supported at the inner wall of the swirl chamber, with the rotor having a nozzle region at its end pointing towards the outlet opening and supported in a cup bearing and an inflow opening at the opposite end, wherein a nozzle member and a distributor member are arranged in the nozzle housing and are rotatable relative to one another, with the distributor member having at least one distributor cutout communicating with the inlet opening, via which functional openings formed in the nozzle member can be controlled, with the functional openings respectively communicating with the swirl chamber or with at least one auxiliary outlet of the nozzle ho