The invention relates to the technical sector of devices for maintenance operations, such as, for example, cleaning swimming pools.

In particular, the invention relates to an autonomous self-propelled device, or robot, for cleaning swimming pools.

There are currently prior art cleaning devices consisting of self-propelled apparatuses which, after having been immersed in a swimming pool, can move on the bottom and on the walls of the swimming pool to perform inside them a cleaning operation, for example using brushes and/or suitable suction circuits which allow detritus present in the water such as leaves or small insects to be removed.

Prior art robots are configured to reach the bottom wall of the swimming pool in which they operate and slide on it thanks to wheels which are usually assisted by the action of a rotor which is configured to generate a hydrodynamic thrust directed perpendicularly to the supporting wall on which the robot must slide in such a way as to improve its adherence to it. During the operations for cleaning the swimming pool, the robot collects, using the above-mentioned cleaning means, all the foreign elements it encounters on its path.

Robots are also known which are able to also move on the side walls of the swimming pool inside of which they are designed to operate, thus allowing all the surfaces to be cleaned.

In other words, the rotors allow the immersion of the robot to be assisted (when necessary) and to keep it adherent with the wall of the swimming pool on which they must slide, whilst their movement along the feed trajectory on this surface is obtained by means of the wheels coupled to the main body of the robot.

However, the prior art devices have drawbacks which significantly reduce the efficiency of the cleaning process. In fact, the prior art devices are not able to efficiently treat the entire volume of water contained inside the swimming pool, since they are only able to reach those portions of liquid located in the immediate proximity of the bottom or of one of the walls of the swimming pool.

This problem is particularly serious in large swimming pools, in which the quantity of water contained in the volume which cannot be reached by the robot becomes prevalent with respect to that which the robot is able to reach and clean.

It is evident that this inefficiency may have numerous negative consequences, both of a purely aesthetic nature, such as the non-removal of leaves or other debris present in the swimming pool, and of a more serious health nature, since there is the real risk that a prevalent part of the water present in the swimming pool is not filtered and cleaned.

The closest known prior art is disclosed in the American U.S. Pat. No. 3,676,884 A.

Other documents of prior art are illustrated in patent applications WO 03/087501 A1, WO 98/51395 A1 and EP 1688562 A2.

However, the robots for cleaning swimming pools described in these documents have a non-optimal direction of the hydrodynamic thrust.

In this context, the technical purpose which forms the basis of this invention is to provide a robot for cleaning swimming pools which overcomes at least some of the above-mentioned drawbacks of the prior art.

In particular, the aim of the invention is to provide a robot for cleaning swimming pools which is able to allow an efficient and accurate cleaning of the entire volume of the swimming pool inside of which the robot is designed to operate.

The technical purpose indicated and the aims specified are substantially achieved by a robot for cleaning swimming pools comprising the technical features described in one or more of the appended claims.

The invention describes a robot for cleaning swimming pools which comprises a main body, a plurality of rotors, a control unit and means for cleaning the swimming pool.

The main body has at least one sealed containment space.

The plurality of rotors is configured for generating a hydrodynamic thrust designed to move the robot inside an entire volume of the swimming pool along a horizontal and/or vertical feed trajectory relative to a water surface of the swimming pool.

The control unit is inserted in the containment space and is configured for modifying at least one respective operating parameter of each rotor in such a way as to direct the hydrodynamic thrust.

