Gutter for collecting water from a facade and system for cleaning water from a facade

Description

[0001] The invention relates to a gutter for collecting water from a facade and a system for cleaning water from a facade.

[0002] During facade cleaning, dirt is rinsed off the facade with water. This dirt consists of deposits that have often accumulated over years. These deposits can contain dust, but also heavy metal particles or other substances that should not be discharged into the wastewater. To prevent this, the water used to rinse the dirt off the facade is collected and either disposed of separately or treated.

[0003] Systems for collecting water from a facade and cleaning it are known from the state of the art. DE 10 2015 118 118 A1 proposes a system with a wastewater pump and a filter system. The water is initially collected by a gutter attached to the facade with adhesive tape. The filter system includes a filter fleece for collecting solid particles and an activated carbon insert with different carbon fillings.

[0004] DE 197 347 61 A1 discloses a system with a collection container. The system includes a filter system that filters a large portion of the contaminants from the dirt mixture. The collection container is cuboid-shaped and open at the top.

[0005] DE 344 04 61 C1 discloses a gutter for collecting facade water with an inwardly directed bend at the upper edge on the facade side. The edge of a conventional covering film is inserted into the retaining profile, which is open at the front, using an elastically deformable clamping cord.

[0006] However, facades are often not smooth. On a rough facade, gutters with rigid edges cannot form a seamless seal that collects the water. Even a flexible rubber band is too rigid to compensate for unevenness in a facade in the millimeter or submillimeter range. This creates gaps between the facade and the edge of the gutter, through which the water can at least partially flow through and bypass the gutter.

[0007] The patent application DE 199 38 478 A1 describes a device for processing a building facade, comprising a working platform which can be moved horizontally and vertically at a distance from the surface to be processed by means of a displacement device and a sealing device for sealing the working space located between the working platform and the surface to be processed from the outside environment.

[0008] The patent application DE 199 05 535 A1 describes a method for removing paint deposits on house walls using a cover hood with which the area to be cleaned is covered, whereby water is supplied under pressure to the area of ​​the interior of the cover hood and is discharged in the lower area of ​​the cover hood with the aid of a vacuum source together with the dissolved paint residues.

[0009] The patent application DE 1 652 333 A1 discloses a washing machine for ceilings and walls in which a roller brush is mechanically driven, the supplied washing liquid is directed onto the roller brush and a sealing frame encloses the outer sides on the ceiling or wall.

[0010] The object of the invention is to propose a gutter and a cleaning system with which the proportion of collected water can be increased and cleaned as efficiently as possible.

[0011] The object of the invention is solved by the independent claims.

[0012] In a first aspect, the invention relates to a gutter for collecting water from a facade, wherein the gutter has an elongated base body with a longitudinal axis. The base body is formed from at least one facade side, a rear side, and a base. The gutter has at least one outlet through which collected water can drain. The facade side has an upper edge equipped with bristles. The bristles are arranged perpendicular to the longitudinal axis and extending away from the base body at an angle relative to a vertical axis.

[0013] The gutter can be made of a metal, particularly aluminum or stainless steel, a plastic, particularly plastic, or an organic material. The length of the gutter determines how much water the gutter can collect at once. A longer gutter covers a larger area of ​​the facade, while a shorter gutter is more mobile and easier to handle. This means it can be transported and stored better than a longer gutter. In practice, a compromise must be found between mobility and collection area. The gutter is preferably between 1 m and 3 m long, particularly 2 m. The width of the gutter should be less than 150 mm, preferably equal to or less than 135 mm, so that it fits between the facade and any scaffolding erected on the facade. Wider gutters also solve the problem, but may not be able to be positioned between a facade and scaffolding.

[0014] The gutter comprises a facade side and a rear side. The facade side is the side of the gutter that extends longitudinally and faces the facade when the gutter is positioned against the facade. The rear side is the side of the gutter opposite the facade side.

[0015] The upper edge of the facade side is covered with bristles. Bristles, as defined in the invention, also include hairs arranged closely together. Positioned at the upper edge of the facade side, the bristles form a kind of brush that is applied to the facade. To ensure contact with the facade, the bristles are arranged at an angle relative to a vertical plane extending parallel to the longitudinal axis of the gutter.

[0016] When the gutter is positioned on the facade, the bristles rest on the facade surface. Each individual bristle is flexible, allowing the entire bristle assembly to adapt to the facade. The bristles allow the gutter to adhere more tightly to the facade than a rigid edge, as the tips of the bristles adhere independently to the facade. Water running down the facade hits the bristles and is diverted into the gutter. To ensure this effect, the bristles must be arranged sufficiently densely.

[0017] In one embodiment, the facade side or a portion of the facade side is inclined relative to a vertical plane running parallel to the direction of extension of the channel. The facade side may, for example, comprise a vertical portion and an inclined portion. In this configuration, the inclined portion is preferably arranged above the vertical portion, so that the vertical portion extends between the inclined portion and the bottom of the channel.

[0018] Preferably, the angle of inclination of the facade side or the inclined part of the facade side is the same angle as the angle by which the bristles are arranged bevelled to the vertical plane.

[0019] The inclination of the facade side or part of the facade side has the advantageous effect of improving the force transfer when arranging the gutter on a facade from the facade to the bristles via the inclined facade side or the inclined part of the facade side. If the bristles are beveled without an inclination of the facade side or part of the facade side, the bristles may bend at the point where they are connected to the facade side, become loose from their fastening means, or even break off. By inclining the facades, the force on the bristles can be transferred to the facade side or the inclined part of the facade side, thus preventing damage to the bristles.

[0020] In one embodiment, the inclination of the facade side, the part of the facade side and / or the bevel of the bristles corresponds to an angle of 10° to 50°, preferably of 20° to 40° and particularly preferably of 30° with the vertical plane.

[0021] If the angle is smaller than the suggested range, the bristles' contact pressure against the facade may be too low to create a sufficient transition for the water from the facade into the gutter. If the bristles are aligned too flat, the water would not be optimally directed into the gutter.

[0022] If the angle is larger than the suggested range, the bristles may exert excessive pressure on the façade, causing the bristles to bend, snap, or otherwise become damaged. In either case, optimal water flow from the façade into the gutter would not be guaranteed.

[0023] The gutter comprises a film that is wrapped around the bristles or around the bristles and at least part of the façade side. For this purpose, the film can preferably be designed as a strip that is wrapped longitudinally around the bristles over the entire length of the gutter. Wrapped up in the sense of the invention means that the film covers the bristles or the bristles and at least part of the façade side on two sides. The film is arranged in particular between the bristles and the façade and is held in position by the contact pressure of the gutter. The film also covers the upper side of the slanted bristles so that the water is guided from the façade over the film into the gutter.

[0024] The film advantageously improves the drainage of water from the facade into the gutter, as the film covers the smallest gaps between the bristles, especially the gaps between their lower ends, and prevents water from seeping through between the bristles.

[0025] The film can be, for example, but not limited to, a film made of polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyester, polycarbonate, polyethylene terephthalate, or another polyolefin. Films made of bio-based plastics, such as polylactide, cellulose acetate, or starch blends, can also be used.

[0026] In one embodiment, the bristles can be made of synthetic hair, in particular polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyester, polycarbonate, polyethylene terephthalate, or another polyolefin. Bristles made of bio-based plastics, such as polylactide, cellulose acetate, or starch blends, can also be used.

[0027] In one embodiment, the gutter has a second outlet, with the outlets arranged along the longitudinal axis at different ends of the gutter. However, the gutter's installation location does not necessarily have to have a flat surface, so the gutter will be tilted when positioned against the facade. In this embodiment, the gutter can only have bristles on the facade side.

[0028] Advantageously, two opposite drains ensure that the gutter can be positioned at an inclination in one direction or the other on the façade and the water can still flow away via one of the drains, namely the one that is located lower.

[0029] In one embodiment, the gutter is open on one side so that it can be combined with a second gutter via a connecting piece or a suitable connecting device to form a larger water collection device. In a further embodiment, the gutter is open on both sides so that it can be combined as a middle piece via two connecting pieces with two gutters open on one side or with further gutters open on both sides to form a water collection device of any length. This modularity means that gutters can be combined to form a water collection device whose length can be adapted to the length of the facade from which water is to be collected. The individual gutters can be easily transported and stored, for example with a length of approx. 2 m, but can also be used for wider facades.

[0030] The connectors can, for example, be simple flanges used to connect two gutters. The connectors are preferably designed to be watertight, so that water does not leak between two gutters or out of the water collection device at the connector.

[0031] In a further aspect, the invention relates to a system for treating water from a facade. The system comprises a gutter, as described above, for collecting water from a facade, as well as a filter system for filtering the water collected by the gutter. The filter system is a multi-stage filter system and is fluidly connected to the gutter.

[0032] During facade cleaning work, water washes away the dirt that may have accumulated on the facade over a longer period of time, for example, years or even decades. The water is collected by the gutter or a water collection system consisting of several gutters. The water, along with the dirt, is then directed to the filter system, where it can be cleaned by the multi-stage filtration system. Once the dirty water has been sufficiently cleaned, the filtered water can be reused for facade cleaning or other cleaning steps that may arise, for example, on a construction site, or stored for later use.

[0033] In one embodiment, the filter system comprises five stages. The stages are arranged so that the dirty water is initially filtered through a filter with a first pore size. As each stage increases, the pore size of the corresponding filter decreases, so that the dirt is filtered out of the dirty water by filters with increasingly smaller pore sizes, and the water becomes cleaner with each stage.

[0034] In one embodiment, the filter system in the first stage comprises a filter with a pore size of 25 µm to 50 µm.

[0035] In one embodiment, the filter system in the second stage comprises a filter with a pore size of 7.5 µm to 15 µm, preferably 10 µm.

[0036] In one embodiment, the filter system in the third stage comprises a filter with a pore size of 2 µm to 7.5 µm, preferably 5 µm.

[0037] In one embodiment, the filter system in the fourth stage comprises a carbon filter, in particular an activated carbon filter, which filters chemicals and heavy metals from the water.

[0038] In one embodiment, the filter system in the fifth stage comprises a microfilter with a pore size of 0.1 µm to 1 µm, preferably 0.5 µm.

[0039] In one embodiment, the individual filters, particularly the filter materials, are color-coded. Color-coding the filters advantageously allows any tampering with the filters, especially any tampering that could be detrimental to the overall system, to be detected. For example, it can ensure that only suitable filters are used in the appropriate stage, so that the purity level of the filtered water specified by the filter system is actually achieved. The use of improper filters can then be identified, especially in the event of damage, by the incorrect color.

[0040] In one embodiment, a pump is arranged between the filter system and the gutter in the direction of flow of the water collected by the gutter. The pump is designed to pump the water collected by the gutter into the filter system at a pressure of 3 to 5 bar.

[0041] The filters prevent water from simply flowing through the filter system. They create a resistance to the water flow, which must be compensated for by appropriate pressure. A pump-generated pressure of 3 to 5 bar is advantageous for preventing water from backing up into the gutter before reaching the filter system.

[0042] In one embodiment, a wet vacuum and an intermediate tank are arranged between the trough and the pump in the direction of flow of the water collected by the trough. The wet vacuum is configured to vacuum the water from the trough and direct it into the intermediate tank.

[0043] Pumps are susceptible to the use of inhomogeneous media. The water collected by the trough may not be present in sufficient quantity to be consistently pumped into the filter system by the pump. If there is too little water in the trough, the pump would also suck in air. The water-air mixture in the pump could lead to increased wear and / or damage to the pump.

[0044] To prevent this problem, a wet vacuum cleaner sucks the water out of the gutter via the drain or one of the drains. Wet vacuum cleaners are designed to suck up water, or liquids in general, as well as air and gas. A low water level in the gutter does not damage the wet vacuum cleaner. The water sucked up by the wet vacuum cleaner is directed into an intermediate tank, from where it is sucked in by the pump and pumped into the filtration system.

[0045] The use of a wet vacuum cleaner and an intermediate container advantageously extends the service life of the pump.

[0046] In one embodiment, the intermediate tank comprises a float switch. The float switch is communicatively connected to the pump. When the water level in the intermediate tank reaches a first threshold level, for example, 50 l to 60 l, the float switch activates the pump, and the water is pumped from the intermediate tank into the filter system. The water level in the intermediate tank begins to drop. When the water level reaches a second threshold level, which is preferably below the first threshold level, the float switch deactivates the pump again.

[0047] In another embodiment, the fill level corresponding to the second threshold level is high enough to prevent the pump from sucking in air. This means that the pump is shut down before it is damaged by air intake.

[0048] The advantage of using a float switch is that the pump only runs when there is sufficient water to pump into the filter system. The pump pauses when there is too little water in the intermediate tank. This not only protects the pump but also reduces the system's energy consumption.

[0049] In one embodiment, the system, in particular the filter system and / or the intermediate container and the wet vacuum cleaner, is installed in a housing. A housing protects the system components from dirt and damage, especially when the system is used on a construction site.

[0050] Further advantages, objects, and features of the invention will be explained with reference to the following description and the accompanying drawings, which illustrate exemplary objects according to the invention. Features that are at least substantially identical in function in the figures may be identified by the same reference numerals, although these features need not be numbered and explained in all figures. Figures 1a, 1b, and 1c show the profile of various gutters. Figure 2 shows a gutter design in which the bristles and part of the facade side are covered with a foil. Figure 3 shows an enlargement of the contact area between the gutter and the facade made of Figure 2Figure 4 shows a perspective view of a gutter on a facade. Figures 5a, 5b, and 5c show embodiments of the gutter with differently positioned drains. Figure 6 shows a collecting device composed of two gutters and a connecting piece. Figure 7 shows the schematic structure of the system for collecting and cleaning facade water. Figure 8 shows the schematic structure and connections between a wet vacuum cleaner, an intermediate tank, and a pump. Figure 9 shows the schematic structure of a filter system.

[0051] In the Figures 1a, 1b and 1cVarious channels 10 are shown in profile view. The channels 10 each comprise a rear side 12, a base 14 and a facade side 16. Bristles 18 are arranged on the upper edge of the facade side 16. The direction of extension of the bristles 18 is inclined by an angle α relative to a vertical plane, indicated here by the dashed line. Figure 1c the bristles 18 are inclined by the angle α relative to the vertical plane, the angle α is not shown for reasons of space.

[0052] The bristles 18 are in contact with a facade 20. The facade 20 has a rough surface. The tips of the bristles 18 lie in valleys or furrows. In one embodiment, the gutter has bristles only on the facade side. In one embodiment, the gutter has bristles only on the facade side, on the surface of the facade 20, thus creating a transition from the facade 20 to the gutter 10. Water running down the facade 20 is diverted via the bristles 18 into the gutter 10 and collected by it.

[0053] The gutters 10 of the Figures 1a, 1b and 1c differ from each other in that the facade sides 16 are designed differently. In Figure 1a the facade side 16 is inclined by the angle α completely opposite the vertical plane.

[0054] In Figure 1bThe facade side comprises two areas. A first inclined area 22 is inclined relative to the vertical plane by an angle α. A second vertical area 24 is aligned parallel or at least substantially parallel to the vertical plane.

[0055] The exact orientation of the facade side 16 is not important for the effectiveness of the invention. In alternative embodiments not shown, for example, the base 14 can be curved and transition continuously or with a curve into the facade side 16. Furthermore, the facade side 16 can also be inclined at an angle other than angle α relative to the vertical plane.

[0056] In Figure 1c the facade side 16 is not inclined, but parallel or at least substantially parallel to the vertical plane. Compared to the embodiments of the Figures 1a and 1bThis embodiment has the disadvantage that when using the channel 10 on a non-vertical facade 20, in particular a facade 20 that is inclined backwards - to the right in the illustration - the bristles 18 may not reach the facade 20. This disadvantage can be compensated by inclining the channel 10 so that the facade side 16 is parallel to the facade 20, as in Figure 1c shown, is aligned.

[0057] Figure 2 shows an embodiment of the channel 10 from Figure 1aThe bristles 18 of the channel 10 and a portion of the facade side are wrapped with a film 26. The film 26 can wrap around the facade side 16 completely or, as shown here, only partially. Wrapping around, in the sense of the invention, means that the bristles 18 and at least a portion of the facade side 16 are covered with the film 26. If the channel 10 is arranged on the facade 20, the bristles 18 do not come into contact with the facade 20, since the film 26 covers the bristles 18 and prevents direct contact.

[0058] An enlargement of the contact point between the bristles 18 of the channel 10 and the facade 20 is shown in Figure 3The bristles 18 serve to compensate for unevenness in the facade surface. The tips of the bristles 18 can settle into small indentations, bumps, or valleys in the facade surface. If a fixed or at least insufficiently flexible edge of a gutter were used, these bumps would cause small holes to form between the facade 20 and the edge, through which water could flow.

[0059] The water follows the flow direction F. First, it runs down the facade 20. The bristles 18 press the film 26 into the unevenness of the facade 20, thus sealing the transition from the facade 20 to the gutter 10. The film 26 also seals the gaps between the bristles 18 by extending the film 26 over part of the facade side 16. The water therefore flows over the film 26 into the gutter 10.

[0060] Figure 4shows a perspective view of the channel 10 according to the embodiment of Figure 1a In this embodiment, the gutter 10 has an outlet 28 attached to one of the end faces of the gutter 10. The bristles 18 of the gutter 10 are in contact with the facade 20 along the entire length along the longitudinal axis L.

[0061] To prevent the gutter 10 from falling over, slipping, or otherwise moving unintentionally, weights (not shown), such as sandbags, can be positioned on the rear side 12 of the gutter 10. The force with which the bristles 18 are pressed against the facade can also be adjusted by positioning the weights on the rear side 12 of the gutter 10.

[0062] The Figures 5a, 5b and 5c show different embodiments of the channel 10. The Figures 5a, 5b and 5c The channels 10 shown have drains 28 that are positioned differently. The channel 10 from Figure 5ahas an outlet 28 located on the left side. The channel 10 of Figure 5b has an outlet 28 which is arranged on the right side of the channel 10. The channel 10 of Figure 5c has two outflows 28 arranged along the longitudinal axis L on different sides of the channel 10.

[0063] In further embodiments not shown, the drain 28 or the drains 28 can also be arranged in the region of the floor 14 or in the floor 14.

[0064] Figure 6 shows a water collection device comprising two gutters 10. The gutters 10 are connected to each other via a connecting piece 30. The left gutter 10 has an outlet 28 on its left side. The right gutter 10 has an outlet 28 on its right side.

[0065] Figure 7 shows a schematic representation of a system for purifying water that is collected from a facade.

[0066] The system comprises a gutter 10. The gutter 10 is connected to the intermediate system 34 via a fluidic connection 32, for example, a hose or a pipe. The intermediate system 34 is connected to the filter system 38 via another fluidic connection 36, for example, a hose or a pipe. The filter system 38 comprises the multi-stage filter system 40, to which the fluidic connection 36 is connected. The system further comprises an outlet 42 from which the filtered water exits. The outlet can, for example, be fluidically connected to a collecting container (not shown here) or a device for using purified facade water.

[0067] Figure 8 shows a schematic representation of the intermediate system 34 from Figure 7The water is sucked out of the channel 10 by a wet vacuum cleaner 44 via the fluidic connection 32. The wet vacuum cleaner 44 directs the water via a fluidic connection 46, for example a hose, a pipe, or a faucet, into an intermediate container 48. The intermediate container 48 includes a float switch 50, which floats on the surface of the water in the intermediate container 48, provided the intermediate container 48 contains water. Figure 8 The intermediate container 48 is shown as filled with water. The water is indicated by the hatching.

[0068] The water can be pumped from the intermediate container 48 by a pump 54 via a fluid connection 52, for example, a pipe or hose. The pump 54 increases the water pressure to preferably 3 to 5 bar and pumps the water via the fluid connection 36 to the filter system 38.

[0069] The pump 54 is coupled to the float switch 50 via an electronic connection 56. The electronic connection 56 can, for example, comprise a simple cable or a combination of cables and a control unit.

[0070] The float switch 50 and the pump 54 are electronically coupled to one another such that the pump 54 is switched on when the float switch has exceeded a first threshold. The first threshold corresponds, for example, to a fill level of 50 l to 60 l. Furthermore, the pump 54 and the float switch 50 are coupled such that the pump is switched off when the float switch has fallen below a second threshold. The first threshold and the second threshold can be assigned to the same fill level, for example, 50 l, so that the pump 54 is active when the float switch 50 is above this fill level and the pump 54 is inactive when the float switch 50 is below this fill level.

[0071] Furthermore, the first threshold and the second threshold can be assigned to different fill levels, so that the pump 54 is not repeatedly switched on and off within a short period of time because the pumping capacity of the pump 54 exceeds the flow from the channel 10 to the intermediate container 48. If the thresholds are different, with the second threshold being assigned to a lower fill level than the first threshold, the pump 54 is activated as soon as the fill level exceeds the first threshold, for example, 60 l, and is only deactivated when the fill level has decreased to the second threshold, for example, 10 l.

[0072] Figure 9 shows a schematic representation of the filter system 38. The filter system 38 comprises a multi-stage filter system that is fed with water through the fluidic connection 36. The water is pumped by the pump 54 (in Figure 9(not shown) is pumped into the filter system at a pressure of preferably 3 bar to 5 bar. In the illustrated embodiment, the filter system comprises five stages.

[0073] The first stage is formed by a pre-filter 58 with a pore size of 25 µm to 50 µm. The pre-filter 58 is designed to filter coarse dirt from the water. The pre-filter 58 is connected to a second filter 62 via a fluidic connection 60. The fluidic connection 60 can be formed, for example, by a hose or a pipe. Alternatively, the fluidic connection 60 can also be formed by a flange, so that the filter 62 is arranged directly behind the pre-filter 58 in terms of fluid communication. A direct fluidic connection reduces the number of components required for the filter system 38.

[0074] The second filter 62 preferably has a pore size of 10 µm. Optionally, the filter system 38 can comprise two second filters 62 arranged fluidically in parallel.

[0075] The second filter 62 is connected to a third filter 66 via a fluidic connection 64. The third filter 66 has a pore size of preferably 5 µm. The fluidic connection 64 can be formed, for example, by a hose or a pipe. Alternatively, the fluidic connection 64 can also be formed by a flange, so that the filter 66 is arranged fluidically directly behind the filter 62.

[0076] The filter 66 is connected to a carbon filter 70 via a fluidic connection 68. The carbon filter 70 comprises carbon, in particular activated carbon, to filter heavy metals and chemicals from the water. The fluidic connection 68 can be formed, for example, by a hose or a pipe. Alternatively, the fluidic connection 68 can be formed by a flange, so that the carbon filter 70 is arranged fluidically directly behind the filter 66.

[0077] The carbon filter 70 is connected to a microfilter 74 via a fluidic connection 72. The microfilter 74 preferably has a pore size of 0.1 µm to 1 µm, particularly preferably 0.5 µm. The fluidic connection 72 can be formed, for example, by a hose or a pipe. Alternatively, the fluidic connection 72 can be formed by a flange, so that the microfilter 74 is arranged fluidically directly behind the carbon filter 70.

[0078] The filter system 38 has an outlet 42 from which the filtered water can drain or be pumped out of the filter system 38. The outlet 42 can be formed, for example, by a hose end, a faucet, or a valve. List of reference symbols

[0079] 10 gutter 58 Prefilter 12 back 60 Fluidic connection 14 Floor 62 filter 16 Facade side 64 Fluidic connection 18 bristles 66 filter 20 facade 68 Fluidic connection 22 Inclined area 70 Carbon filter 24 Vertical area 72 Fluidic connection 26 film 74 Fine filter 28 drain 30 connecting piece α angle 32 Fluidic connection F Flow direction 34 Intermediate system L Longitudinal axis 36 Fluidic connection 38 filter system 40 filter system 42 Outlet 44 Wet vacuum cleaner 46 Fluidic connection 48 Intermediate container 50 Float switch 52 Fluidic connection 54 pump 56 Electronic connection

Claims

1. A gutter (10) for collecting water from a façade, wherein the gutter (10) has an elongate base body with a longitudinal axis (L), wherein the base body is formed at least from a façade side (16), a rear side (12) and a base (14), wherein the gutter (10) has at least one outlet (28) via which collected water can run off, wherein the façade side (16) has an upper edge wherein the upper edge of the façade side (16) is equipped with bristles (18), wherein the bristles (18) are arranged perpendicular to the longitudinal axis (L) and sloping away from the base body with respect to a vertical axis, characterised in that the gutter (10) comprises a foil (26), the foil (26) being wrapped around the bristles (18) or around the bristles (18) and at least a part of the façade side (16).

2. The gutter (10) according to claim 1, wherein the façade side (16) or a part thereof is inclined relative to a vertical plane which runs parallel to the longitudinal axis (L) of the base body.

3. The gutter (10) according to claim 2, wherein the inclination of the façade side (16) or a part thereof with respect to the vertical plane is at an angle of 10° to 50°, preferably of 20° to 40°, particularly preferably of 30°.

4. The gutter (10) according to one of the preceding claims, wherein the direction of extension of the bristles (18) is inclined by an angle of 10° to 50°, preferably of 20° to 40°, particularly preferably of 30°, relative to a vertical plane which runs parallel to the longitudinal axis (L) of the base body.

5. The gutter (10) according to one of the preceding claims, wherein the gutter (10) comprises a second outlet (28), wherein the outlets (28) are arranged at different ends of the gutter (10) along the longitudinal axis (L).

6. A system for cleaning water from a façade comprising a gutter (10) according to one of the preceding claims for collecting the water, and a filter unit (38) for filtering the water collected by the gutter (10), wherein the filter unit (38) is a multi-stage filter system (40). and wherein the filter unit (38) is fluidically connected to the gutter (10) via the at least one outlet (28) of the gutter.

7. The system according to claim 6, wherein a first stage of the filter system (40) comprises a pre-filter (58) having a pore size of 25 µm to 50 µm.

8. The system according to any one of claims 6 to 7, wherein a second stage of the filter system (40) comprises one or two filters (62) having a pore size of 10 µm.

9. The system according to any one of claims 6 to 8, wherein a third stage of the filter system (40) comprises a filter (66) having a pore size of 5 µm.

10. The system according to any one of claims 6 to 9, wherein a fourth stage of the filter system (40) comprises a carbon filter (70), in particular an activated carbon filter, for chemicals and heavy metals.

11. The system according to any one of claims 6 to 10, wherein a fifth stage of the filter system (40) comprises an ultra-fine filter (74) having a pore size of 0.1 µm to 1 µm, preferably 0.5 µm.

12. The system according to one of claims 6 to 11, wherein a pump (54) is arranged between the filter system (38) and the gutter (10) in the direction of flow of the water collected by the gutter, wherein the pump (54) is designed to pump the collected water from the façade into the filter system (38) at a pressure of 3 bar to 5 bar.

13. The system according to claim 12, wherein a wet vacuum cleaner (44) and an intermediate container (48) are arranged between the gutter (10) and the pump (54) in the direction of flow of the water collected by the gutter (10), wherein the wet vacuum cleaner (44) is configured to suck the water out of the gutter (10) and direct it into the intermediate container (48).

14. The system according to claim 13, wherein the intermediate tank (48) comprises a float switch (50), wherein the float switch (50) is configured to switch on the pump (54) when the level in the intermediate tank (48) exceeds a first threshold level and to switch off the pump (54) when the level in the intermediate tank (48) falls below a second threshold level.