DEVICE FOR CLEANING A ROOF WINDOW

Description

Technical field of the invention

[0001] The present invention relates to the general field of individual or collective housing, and more particularly to a window cleaning device for a roof. State of the art

[0002] In the field of individual or collective housing, it is known to install roof windows whose main function is to bring light and, where appropriate, heat to rooms that are at least partially attic-style.

[0003] However, it is also known that this type of window has the major drawback of being very often and quickly soiled by the weather, rendering it partially opaque. Consequently, this type of window loses much of its usefulness by failing to fulfill its primary function.

[0004] To ensure that roof windows remain functional, the homeowner must clean them regularly. However, roof windows are typically difficult to access, making cleaning them time-consuming, complicated, and in some cases, dangerous.

[0005] Finally, depending on the region where the house equipped with roof windows is installed, cleaning must be more or less regular, which can further increase the risk of incidents or even accidents.

[0006] Devices for cleaning windows are known, such as, for example, the one described in the Chinese utility model CN ​​209 966 256. However, this document describes a vertical self-cleaning window suitable exclusively for new constructions of individual or collective dwellings, and not a cleaning device suitable for a classically inclined roof window. Summary of the invention

[0007] The aim of the present invention is therefore to propose a device for cleaning a roof window, possibly already existing, capable of being triggered automatically or on the request of a user, designed in a reliable, durable, and environmentally friendly way, and adapted to the region of installation of the roof window and the climatic conditions of the day, while reducing the risk of domestic accidents related to the cleaning of said roof window.

[0008] According to the invention, a device is therefore proposed for cleaning the exterior face of a glazed surface of a roof window, comprising at least one frame framing said glazed surface, being fixed to said roof of an individual or collective dwelling, and comprising two parallel lateral uprights connecting lower and upper crossbars, notable in that it comprises at least: a box fixed on and along said upper cross member and containing at least one reservoir, an electronic control board, an electric motor, and a pump, a rainwater collector arranged to be placed on the roof above said box and connected to said reservoir, a diffuser allowing to project, with the aid of said pump, collected rainwater contained in the reservoir onto the top of the outer face of said glazed surface, a cleaning tool arranged perpendicular to said two lateral uprights, and guiding means allowing to move, with the aid of said electric motor, the cleaning tool along said two lateral uprights.

[0009] The enclosure preferably includes a photovoltaic cell panel associated with a means of electrical energy storage in order to provide the various elements of said enclosure with the electrical energy necessary for their proper functioning.

[0010] The tank is advantageously insulated.

[0011] Preferably, the tank has double walls separated by a layer of air.

[0012] According to a particular embodiment, the collector is generally in the form of a gutter whose cross-section is U-shaped and flares out towards its upper edge, so as to channel the collected rainwater towards a narrow passage located on its lower edge, said collector then comprising a plate in the general shape of a trapezoid and two wings extending perpendicularly from each of the inclined lateral edges of the plate, the lower ends of the two wings and the lower edge of said plate determining said passage, the collector being arranged on the roof of the dwelling so that its plate rests on the roof, its wings being oriented on the opposite side of said roof.

[0013] The collector is advantageously made of a flexible material that is resistant to weather conditions, in order to perfectly fit the shape of the roof and avoid any risk of oxidation.

[0014] The collector is advantageously combined with filtration means to preserve the cleanliness of the collected rainwater in order to guarantee the efficiency and durability of the cleaning system.

[0015] Preferably, these filtration means are of the gravity type and comprise two stages of filtration: a first stage consisting of a grid to retain large impurities such as leaves, and a second stage consisting of a filter element to retain smaller impurities such as sand, these two stages being joined together to form a complete filtration unit positioned at the point where the collector passes, in order to filter the rainwater collected before it enters the reservoir.

[0016] The cleaning tool preferably includes at least one scrubbing tool.

[0017] According to a particular embodiment, the friction tool is pivotally mounted on a support, the latter having stops configured to allow the friction tool to pivot between a "rest" position in which said friction tool is no longer in contact with the glass surface and extends substantially parallel to the latter, and a "cleaning" position in which said friction tool is in contact with the glass surface and extends substantially perpendicular to the latter.

[0018] According to an advantageous embodiment, the guidance means comprise at least: two rails fixed each along one of the two lateral uprights of the roof window frame, two trolleys sliding each along one of the two rails and each receiving one of the longitudinal ends of the cleaning tool, a belt stretched along one of said two lateral uprights between a drive pulley driven in rotation by the motor and a receiving pulley, said drive and receiving pulleys pivoting around an axis perpendicular to said associated lateral upright, said belt being attached to the cleaning tool.

[0019] The guiding means preferably comprise two belts each stretched along one of said two lateral uprights between a drive pulley and a driven pulley, the two drive pulleys being fixed on a transmission shaft driven by the motor.

[0020] According to an advantageous embodiment, the connections between the cleaning tool and the carriages and between each belt and the cleaning tool are of the annular linear connection type.

[0021] Advantageously, the cleaning device includes at least: an outdoor ambient air temperature sensor, an outdoor ambient air humidity sensor, a low level detector in the tank, a high level detector in the tank, and a temperature sensor for the rainwater contained in said tank, said sensors being at least partly contained within the casing.

[0022] The cleaning device also includes a communication module associated with the electronic control board arranged to communicate, via a wireless connection, with an application that can be displayed on an electronic screen of a remote control or a device connected to the internet network, this application allowing the cleaning device to be configured and / or controlled or ordered. Brief description of the figures

[0023] Other advantages and features will become clearer from the following description of an embodiment of the invention, with reference to the attached figure in which: [ Fig 1 ] is a perspective view of the cleaning device according to the invention [ Fig 2 ] is an exploded perspective view of the cleaning device of the figure 1 , [ Fig 3 ] is a front view of the cleaning device of the figure 1 , [ Fig 4 ] is a side view of the cleaning device figure 3 , [ Fig 5 ] is a detailed view of the collector of the cleaning device figure 1 , [ Fig 6 ] is a perspective view of the cleaning device of the figure 1 on which the casing cover and side panels have been removed, [ Fig 7 ] is a detailed view of the guiding means of the cleaning device of the figure 1 , [ Fig 8 ] is a schematic view of the inside of the housing of the cleaning device according to the invention. Description of the implementation methods

[0024] With reference to figures 1 to 8 The cleaning device 1 according to the invention of a roof window 2 comprising a glazed surface 3 and being disposed on the roof of an individual or collective dwelling, not shown, is designed to perform at least the following functions: collect rainwater, store and preserve the collected rainwater, withstand outdoor installation in general and weathering in particular, produce electrical energy to ensure its energy autonomy, and clean an external face of the glazed surface 3 of said roof window 2, that is to say the face of said glazed surface 3 located outside the individual or collective dwelling, by a friction action on the glazed surface 3 associated with the diffusion of the rainwater collected on the latter.

[0025] In a conventional manner, said roof window 2 is arranged inclined and includes at least one frame 4 framing said glazed surface 3, being fixed on said roof of the dwelling, and comprising two parallel lateral uprights 5 connecting lower 6 and upper 7 crossbars.

[0026] It is understood that, without departing from the scope of the present invention, said roof window 2 may be vertical and include a sash mounted pivoting in said frame 4, the glazed surface 3 then being mounted in said sash.

[0027] To perform the functions described above, the cleaning device 1 according to the invention comprises at least: a box 10 fixed on and along the upper cross member 7 of the frame 4, a rainwater collector 11 arranged to be placed on the roof above said box 10, a diffuser 12 of rainwater collected on the glazed surface 3 of the roof window 2, a cleaning tool 13 for the outer face of said glazed surface 3 arranged perpendicular to the two lateral uprights 5 of the frame 4 of said roof window 2, and guiding means 14 for moving the cleaning tool 13 along said two lateral uprights 5.

[0028] The purpose of the aforementioned enclosure 10 is to provide a protective structure for the elements it contains, resisting external conditions while simultaneously enclosing and concealing said elements for aesthetic purposes. Thus, the enclosure 10 is advantageously designed to withstand temperatures ranging from -20°C to +50°C, winds of up to 130 km / h, and a UV index (a scale measuring the intensity of ultraviolet radiation emitted by the Sun and the associated health risks) of 10. Furthermore, the lifespan of the enclosure 10 must be at least 10 years, and its structure must be watertight, meeting the IP24 certification standard (which, as a reminder, provides protection against solid objects larger than 1 mm and against water spray from all directions).

[0029] In addition, the casing 10 contains at least one reservoir 15 connected to said rainwater collector 11, an electronic control board 16, an electric motor 17, guiding means 14, and a pump 18. The latter is conventionally associated with solenoid valves and tubes, not shown, to convey the water stored in said reservoir 15 to the diffuser 12 via the pump 18, during the cleaning of the glazed surface 3 of the roof window 2 by the cleaning device 1. The casing 10 advantageously contains a plurality of sensors, the type and operation of which will be described later.

[0030] Furthermore, said enclosure 10 includes a photovoltaic cell panel 19 associated with an electrical energy storage means 20 to supply the various elements of said enclosure 10 with the electrical energy necessary for their proper functioning. It is understood that the photovoltaic cell panel 19 can, without departing from the scope of the present invention, be replaced by another source of electrical energy such as removable batteries or a cable for connection to the building's electrical grid; however, it is clear that said photovoltaic cell panel 19 allows the cleaning device 1 according to the invention to be environmentally friendly by being powered by renewable energy. The storage means 20 is a Li-Po battery due to its small size and low environmental pollution, particularly compared to lead-acid batteries.

[0031] To contain all the elements described above, the enclosure 10 advantageously includes at least: a housing 21 of overall parallelepiped shape, fixed on and along the upper cross member 7 of the frame 4 of the roof window 2 and having an opening 22 located on the side opposite the roof, and a cover 23 closing said opening 22 in a removable and watertight manner and receiving on its external face the photovoltaic cell panel 19.

[0032] According to an even more advantageous embodiment, the casing 21 defines three compartments, namely: a first compartment 24 for the reservoir 15, a second compartment 25 for the storage means 20, the electronic control board 16, the pump 18 and the associated solenoid valves and tubing, and a third compartment 26 for part of the guidance means 14. The first and second compartments 24, 25 are advantageously thermally insulated to keep the sensitive components and the reservoir 15 within a reasonable temperature range and to avoid large temperature variations. For this purpose, wood wool panels are preferably applied to the internal walls of the first and second compartments 24, 25, wood wool being a very effective and environmentally friendly natural insulator, as it allows for waste recovery and is 100% recyclable.

[0033] The collector 11 is generally shaped like a gutter with a U-shaped cross-section that flares out towards its upper edge, i.e., in a direction opposite to the casing 10, so as to channel the collected rainwater towards a narrow passage 27 located on its lower edge. The collector 11 comprises a generally trapezoidal plate 28 and two flanges 29 extending perpendicularly from each of the inclined lateral edges of the plate 28. The lower ends of the two flanges 29 and the lower edge of the plate 28 define the passage 27. The collector 11 is positioned on the roof of the building so that its plate 28 rests on the roof, with its flanges 29 oriented towards the side opposite the roof.For this purpose, the collector 11 is advantageously made from a flexible material resistant to the climatic conditions of the installation site of the cleaning device 1 according to the invention (i.e., resistant to rain, snow, ultraviolet radiation, etc.), in order to perfectly conform to the shape of the roof and prevent any risk of oxidation. The collector 11 can therefore be made, for example, of a flexible synthetic material or of stainless steel.

[0034] This particular configuration with, on the one hand, the box 10 containing the reservoir 15 and fixed on and along the upper cross member 7 of the frame 4 of the roof window 2 and, on the other hand, the rainwater collector 11 arranged to be placed on the roof above said box 10 is interesting because it allows the cleaning device 1 according to the invention to be installed on an old or new roof window.

[0035] Furthermore, the specific shape of the collector 11 and its positioning on the roof above said box 10 is also interesting, as it allows for better collection of rainwater.

[0036] Furthermore, the collector 11 is equipped with filtration systems to maintain the cleanliness of the collected rainwater and ensure the effectiveness and longevity of the cleaning system 1. These filtration systems are gravity-fed and advantageously comprise two filtration stages: a first stage consisting of a grid to retain larger impurities such as leaves, and a second stage consisting of a filter element to retain smaller impurities such as sand. These two stages are preferably placed side-by-side to form a complete filtration unit 30 positioned at the point 27 of the collector 11 to filter the collected rainwater before it enters the reservoir 15.Finally, the collector 11 preferably includes an opening 31 on one of its wings 29 above the filtration assembly 30 to allow excess collected rainwater to drain away while cleaning the upper face of said filtration assembly 30.

[0037] As described previously, the housing 10 of the cleaning device 1 according to the invention comprises a reservoir 15 whose purpose is to keep the collected rainwater sealed for a predetermined period at a temperature within a predetermined temperature range, advantageously between +2°C and +28°C, so as to protect the collected rainwater from variations in outside temperature, in both summer and winter. To this end, the reservoir 15 is isothermal and advantageously has double walls separated by a layer of air, which allows for heat exchange only by radiation and eliminates conduction and convection flows between the ambient air and the rainwater contained in the reservoir 15. Furthermore, the reservoir 15 is generally parallelepiped-shaped and has on its upper face an inlet connected to the passage 27 of the collector 11 and on or near its lower face an outlet connected to the diffuser 12.

[0038] To facilitate cleaning the exterior surface of the glazed area 3 of the roof window 2, the diffuser 12, via the pump 18, projects collected rainwater from the reservoir 15 onto the upper surface of the glazed area 3. This water then flows down the glazed area 3 by gravity. This particularly simple solution allows for a short and direct path from the reservoir 15 and avoids the use of flexible hoses connected, for example, to the cleaning tool 13, which are unsightly and prone to freezing in winter. For this purpose, the diffuser 12 is advantageously fixed below the housing 10 and has a plurality of nozzles 32 arranged to distribute the collected water over the entire width of the glazed area 3 of the roof window 2.This diffuser 12 is preferably manufactured using 3D printing in acrylonitrile styrene acrylate (ASA) or acrylonitrile butadiene styrene (ABS). These materials are advantageous because they are more resistant to UV radiation and water than other materials such as polylactic acid (PLA). Furthermore, ASA and ABS also have the advantage of being thermoplastics that can be easily integrated into the plastic waste recycling cycle.

[0039] As described previously, to facilitate the cleaning of the outer face of the glazed surface 3 of the roof window 2, the cleaning device 1 according to the invention further comprises a cleaning tool 13 arranged perpendicular to the two lateral uprights 5 of the frame 4 of said roof window 2, said cleaning tool 13 comprising at least one friction tool 33 suitable for cleaning the outer face of the glazed surface 3 of the roof window 2 by a friction action.

[0040] Furthermore, the operating principle of the cleaning tool 13 is advantageously inspired by that of a vehicle's windshield wiper. Thus, during the downward phase, the rubbing tool 33 will apply a rubbing force to the outer surface of the glazed surface 3 of the roof window 2 for initial cleaning, and during the upward phase, the rubbing tool 33 will not apply any rubbing force to said outer surface.For this purpose, according to an advantageous embodiment, the friction tool 33 is pivotally mounted on a support 34 about an axis perpendicular to the two lateral uprights 5 of the frame 4 of said roof window 2, the latter having stops, not shown, configured to allow the friction tool 33 to pivot between a "rest" position in which said friction tool 33 is no longer in contact with the outer face of the glazed surface 3 of the roof window 2 and extends substantially parallel to said glazed surface 3, and a "cleaning" position (Cf. . figure 7in which said friction tool 33 is in contact with the outer face of the glazed surface 3 and extends substantially perpendicularly to said outer face. During the descent phase, the force induced by the friction of the friction tool 33 on the outer face of the glazed surface 3 of the roof window 2 tends to press said friction tool 33 against the stops, which ensures good contact of the friction tool 33 against said outer face and therefore effective cleaning. During the ascent phase, the friction tool 33 is no longer in contact with said stops, and is therefore free to pivot relative to said support 34; said friction tool 33 then does not apply a friction force to the outer face of the glazed surface 3 of the roof window 2.Finally, at the end of the cleaning, this advantageous configuration allows the said rubbing tool 33 to come into a "rest" position and be stored on the diffuser 12, which will also ensure its cleaning.

[0041] Thus, in the very frequent case of an inclined roof window 2, it is clear that the arrangement and mode of movement (up and down movement) of the cleaning tool 13 of the cleaning device 1 according to the invention makes it possible to take advantage of the gravity linked to the natural slope of the roof on which the cleaning device 1 is installed and, consequently, to mobilize less energy to apply friction forces of said cleaning tool 13.

[0042] Finally, the 33 friction tool is advantageously either of the type window squeegee or vehicle wiper and therefore includes a blade made of natural or synthetic material such as, for example, rubber or similar, or of the brush type and therefore includes a blade fitted with bristles made of natural or synthetic material.

[0043] The cleaning device 1 according to the invention includes guide means 14 for moving, with the help of the electric motor 17, the cleaning tool 13 along said two lateral uprights 5 of the frame 4 of said roof window 2.

[0044] Thus, in the very frequent case of an inclined roof window 2 having a sash receiving the glazed window 3 and mounted pivoting in said frame 4 around an axis perpendicular to said lateral uprights 5, the arrangement and direction of movement of the cleaning tool 13 of the cleaning device 1 according to the invention does not prevent the opening of said sash.

[0045] To this end, according to an advantageous embodiment, the guiding means 14 comprise at least: two rails 36 fixed each along one of the two lateral uprights 5 of the frame 4 of the roof window 2, two carriages 37 sliding each along one of the two rails 36 and each receiving one of the longitudinal ends of the cleaning tool 13 and, where applicable, one of the ends of its support 34, a belt 38 stretched along one of said two lateral uprights 5 between a drive pulley 39 driven in rotation by the motor 17 and a receiving pulley 40, said drive pulleys 39 and receiving pulley 40 pivoting about an axis perpendicular to said associated lateral upright 5, said belt 38 being secured, advantageously by its upper strand, to the cleaning tool 13, where applicable to its support 34, so that the rotation of the drive pulley 39 causes the translation of the cleaning tool 13.

[0046] To avoid binding and jerky movements during the translation of the cleaning tool 13, the guiding means 14 preferably comprise two belts 38, each tensioned along one of the two lateral uprights 5, between a drive pulley 39 and a driven pulley 40. In this configuration, the motor 17 then rotates a transmission shaft 41 to which the two drive pulleys 39 are attached. These pulleys are fixed to the shaft by means of a set screw and a flat on the transmission shaft 41, due to the relatively low torque. While this configuration is somewhat mechanically complex, it allows the use of only one motor 17 and eliminates the need for a synchronization system between multiple motors, thus simplifying the control system and reducing power consumption. This also ensures good reliability and decreases the likelihood of electronic failure.

[0047] It is understood that the guiding means 14 may be of a completely different type such as, for example, a pinion-rack assembly or a nut-screw assembly, without departing from the scope of the present invention.

[0048] According to an advantageous embodiment, the rails 36 are cylindrical metal rods, preferably made of aluminum for obvious reasons of weight reduction and recyclability, and the trolleys 37 are mounted on ball bearings so as to limit friction and facilitate their movement.

[0049] However, it is clear that the main weaknesses of these guide means 14 are their indeterminacy due to the presence of the two-rail guide 36, and their tendency to jam. Indeed, at small distances between the rails 36, the slightest lack of parallelism between said rails 3 can cause the cleaning tool 13 to jam. To overcome this drawback, the guide means 14 are designed to allow for some operating play, thus reducing the indeterminacy of the mechanism. To this end, the connection between the cleaning tool 13, or, where applicable, its support 34, and the carriages 37 is advantageously of the annular linear type, so as to allow for ball joint movement and lateral translation, enabling the guide means 14 to compensate for possible assembly defects and therefore operate without jamming.Similarly, the connection between each belt 38 and the cleaning tool 13 or, where applicable, its support 34 is advantageously of the annular linear connection type with a rivet fixed on each belt 38 sliding in an oblong hole provided at the associated longitudinal end of the cleaning tool 13.

[0050] Finally, the guide means 14 are fitted with protective side covers 42, advantageously made of folded sheet metal. These side covers 42 improve the overall appearance by concealing all the mechanical components of the guide means 14, and are fixed to the housing 10 and, at the bottom, to the frame 4 of the roof window 2. These side covers 42 are preferably in two parts to ensure access for fixing and adjusting said mechanical components from the inside. Furthermore, these side covers 42 also help protect the guide means 14 from external conditions, ensuring in particular that they maintain good lubrication and do not seize up.

[0051] As described previously and with reference to the figure 8 The cleaning device 1 according to the invention comprises a plurality of sensors contained at least partially within its housing 10. These include at least the following sensors: an outdoor ambient air temperature sensor 43, an outdoor ambient air humidity sensor 44, a low level detector 45 in the tank 15, a high level detector 46 in the tank 15, a temperature sensor 47 for rainwater contained in said tank 15.

[0052] The measurements from these various sensors 43 to 46 enable the triggering of automatic cleaning modes, such as, for example, cleaning the glazed surface 3 of the roof window 2 with a predetermined number of passes of the cleaning tool 13, when the rainwater level in the reservoir 15 is sufficient or when rain is falling. Furthermore, the measurements from these various sensors can be combined with settings of the electronic control board 16, depending on the geographical region where the cleaning device 1 is installed.Thus, it may be possible, for example, to decide that the humidity at the beginning of the day (morning dew) may be sufficient, in certain regions of France, to trigger a cleaning of the glazed surface 3 of the roof window 2, or that the number of back and forth trips of the cleaning tool 13 must be increased if the installation takes place in an industrial area where the deposits of pollutant on the glazed surface 3 could be greater than in rural areas.

[0053] Finally, the cleaning device 1 according to the invention advantageously includes a communication module 48 associated with the electronic control board 16 arranged to communicate, via a wireless connection, for example, of the infrared type, Bluetooth (Registered Trademark), or similar, with an application displayable on an electronic screen of a remote control or of a device connected to the internet network of the type smartphone, tablet or similar, this application allowing to configure and / or control or command the cleaning device 1 according to the invention.

[0054] It is understood that the cleaning device 1 according to the invention is, of course, used to clean a roof window, but it can also be adapted to clean other equipment such as, for example, solar panels.

[0055] Finally, it goes without saying that the examples of cleaning devices 1 according to the invention that have just been given are only particular illustrations, in no way limiting the scope of the invention.

Claims

1. Device (1) for cleaning an external face of a glazed surface (3) of a roof window (2) comprising at least one frame (4) framing said glazed surface (3), being attached to said roof of an individual or collective dwelling, and including two lateral uprights (5) parallel to each other and connecting lower (6) and upper (7) cross members to each other, characterized in that it comprises at least: - a housing (10) secured to and along the aforementioned upper cross member (7) and containing at least one reservoir (15), a control electronic board (16), an electric motor (17), and a pump (18), - a rainwater collector (11) arranged to be placed on the roof above said housing (10) and connected to said reservoir (15), - a diffuser (12) for spraying, using said pump (18), the collected rainwater contained in the reservoir (15) onto the upper part of the external surface of said glazed surface (3), - a cleaning tool (13) positioned perpendicularly to said two lateral uprights (5), and - guiding means (14) for moving the cleaning tool (13) along the two lateral uprights (5) using said electric motor (17).

2. Cleaning device (1) according to claim 1, characterized in that the housing (10) comprises a panel of photovoltaic cells (19) associated with a means (20) for storing electrical energy in order to provide the various elements of said housing (10) with the electrical energy necessary for their proper operation.

3. Cleaning device (1) according to either one of claims 1 or 2, characterized in that the reservoir (15) is isothermal.

4. Cleaning device (1) according to claim 3, characterized in that the reservoir (15) comprises double walls separated by an air layer.

5. Cleaning device (1) according to any one of claims 1 to 4, characterized in that the collector (11) is in the general shape of a chute whose cross-section is U-shaped and splaying in the direction of its upper edge, so as to channel the collected rainwater to a narrow passage (27) located on its lower edge, said collector (11) then comprising a plate (28) in the general shape of a trapezium and two flanges (29) coming perpendicularly from each of the inclined lateral edges of the plate (28), the lower ends of the two flanges (29) and the lower edge of said plate (28) determining said passage (27), the collector (11) being disposed on the roof of the dwelling so that its plate (28) is bearing on the roof, its flanges (29) being oriented to the side opposite said roof.

6. Cleaning device (1) according to claim 5, characterized in that the collector (11) is made of a flexible material resistant to climatic conditions, in order to perfectly fit the shape of the roof and to avoid any risk of oxidation.

7. Cleaning device (1) according to any one of claims 1 to 6, characterized in that the collector (11) is associated with filtration means to preserve the cleanliness of the collected rainwater in order to guarantee the effectiveness and sustainability of the cleaning device (1).

8. Cleaning device (1) according to any one of claims 7 and 5 or 6 characterized in that these filtration means are of the gravity type and include two filtration stages: a first stage consisting of a grille for retaining the coarse impurities such as leaves, and a second stage consisting of a filter element for retaining the smallest impurities such as sand, these two stages being joined together to form a complete filtration assembly (30) vertically above the passage (27) of the collector (11), in order to filter the rainwater collected before it enters the tank (15).

9. Cleaning device (1) according to any one of claims 1 to 8, characterized in that the cleaning tool (13) comprises at least one rubbing tool (33).

10. Cleaning device (1) according to claim 9, characterized in that the rubbing tool (33) is pivotably mounted on a support (34), the latter including stops configured to allow a pivoting of the friction tool (33) between a "rest" position in which said friction tool (33) is no longer in contact with the glass surface (3) and extends substantially parallel to the latter, and a "cleaning" position in which said rubbing tool (33) is in contact with the glass surface (3) and extends substantially perpendicular to the latter.

11. Cleaning device (1) according to any one of claims 1 to 10, characterized in that the guiding means (14) include at least: - two rails (36) each secured along one of the two lateral uprights (5) of the frame (4) of the roof window (2), - two carriages (37) each sliding along one of the two rails (36) and each receiving one of the longitudinal ends of the cleaning tool (13), - a belt (38) tensioned along one of the two lateral uprights (5) between a drive pulley (39) rotated by the motor (17) and a receiving pulley (40), said drive pulley (39) and receiving pulley (40) pivoting about an axis perpendicular to said associated lateral upright (5), said belt (38) being attached to the cleaning tool (13).

12. Cleaning device (1) according to claim 11, characterized in that the guiding means (14) include two belts (38) each tensioned along one of said two lateral uprights (5) between a drive pulley (39) and a receiving pulley (40), said two drive pulleys (39) being fastened to a transmission shaft (41) driven by the motor (17).

13. Cleaning device (1) according to either one of claims 11 or 12, characterized in that the connections between the cleaning tool (13) and the carriages (37) and between each belt (38) and the cleaning tool (13) are of the annular linear connection type.

14. Cleaning device (1) according to any one of claims 1 to 13, characterized in that it comprises at least: - an external ambient air temperature sensor (43), - an external ambient air humidity sensor (44), - a detector (45) for low level in the reservoir (15), - a detector (46) for high level in the reservoir (15), and - a temperature sensor for the rainwater (47) contained in said reservoir (15), said sensors being at least partially contained in the housing (10).

15. Cleaning device (1) according to any one of claims 1 to 14, characterized in that it includes a communication module (48) associated with the control electronic board (16) arranged to communicate, via a wireless connection, with an application that can be displayed on an electronic screen of a remote control or a device connected to the internet network, this application making it possible to configure and / or control or command the cleaning device (1).