EP4170112A1 - Gutter for collecting water from a façade and system for cleaning water from a façade - Google Patents

Abstract

The invention relates to a channel for collecting water from a facade,
the gutter having an elongate body with a longitudinal axis,
wherein the base body is formed at least from a facade side, a rear side and a floor,
wherein the channel has at least one drain through which collected water can drain,
where the facade side has an upper edge,
characterized in that the upper edge of the facade side is equipped with bristles,
wherein the bristles are arranged so as to extend away from the base body perpendicular to the longitudinal axis and at an angle with respect to a vertical axis.

Description

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

During facade cleaning work, dirt is washed off the facade with water. The dirt consists of deposits that have often accumulated over the years. The deposits can contain dust, but also heavy metal particles or other substances that should not get into the waste water. To prevent this, the water used to wash away the dirt from the facade is collected and disposed of separately or cleaned.

Systems for collecting the water from a facade and for cleaning the water are known from the prior art. The DE 10 2015 118 118 A1 proposes a system with a waste water pump and a filter system. The water is first collected by a channel that is 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 beds.

From the DE 197 347 61 A1 a system with a collection container is known. The system includes a filter system that filters a large part of the contaminants from the dirt mixture. The collection container is cuboid and is open at the top.

From the DE 344 04 61 C1 a channel for collecting facade water with a facade side at the upper edge inwardly facing is known. The edge area of a conventional cover film is pushed into the holding profile, which is open towards the front, by means of an elastically deformable clamping cord.

However, facades are very often not smooth. On a rough facade, channels with rigid edges cannot form a seamless finish that collects the water. Even a flexible elastic 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 channel, through which the water can at least partially flow and bypass the channel.

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

The object of the invention is achieved by the independent claims.

In a first aspect, the invention relates to a gutter for collecting water from a facade, the gutter having an elongate base body with a longitudinal axis. The base body is formed at least from a facade side, a rear side and a floor. The channel 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 perpendicularly to the longitudinal axis and extending away from the base body at an incline with respect to a vertical axis.

The channel can be made, for example, from a metal, in particular aluminum or stainless steel, a plastic, in particular plastic, or an organic material. The length of the gutter determines how much water the gutter can hold at one time. A longer channel covers a larger area of the façade, while a shorter channel is more mobile and handy. This means it can be transported and stored better than a longer gutter. In practice, a compromise has to be found between mobility and collection area. The channel is preferably between 1 m and 3 m long, particularly preferably 2 m long. The width of the gutter should be less than 150mm, preferably equal to or less than 135mm to fit between the facade and scaffolding erected against the facade. Wider channels also solve the problem, but may not be able to be positioned between a facade and scaffolding.

The channel includes a front side and a back 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 is the side of the channel opposite the facade side.

The upper edge of the facade side is covered with bristles. Bristles within the meaning of the invention also include hairs that are arranged close together. Due to their positioning on the upper edge of the facade side, the bristles form a kind of brush that is applied to the facade. So that the bristles can be brought into contact with the facade, they are opposite one vertical plane, which extends parallel to the longitudinal axis of the channel, arranged inclined.

If the channel is positioned on the facade, the bristles lie on the facade surface. Each individual bristle is flexible so that the bristles as a whole adapt to the facade. With the bristles, the channel closes tighter to the facade than a rigid edge, since the tips of the bristles lie against the facade independently of one another. Water running down the facade hits the bristles and is diverted into the gutter. In order to ensure this effect, the bristles must be arranged sufficiently densely.

In one embodiment, the facade side or a part of the facade side is inclined relative to a vertical plane that runs parallel to the direction in which the channel extends. The facade side can, for example, comprise a vertical area and an inclined area. In this configuration, the inclined portion is preferably located above the vertical portion such that the vertical portion extends between the inclined portion and the bottom of the chute.

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 inclined to the vertical plane.

The inclination of the facade side or a part of the facade side has the advantageous effect that the transmission of force when the channel is arranged on a facade from the facade to the bristles via the inclined facade side or the inclined part of the facade side is improved. If the bristles are beveled without an inclination of the facade side or part of the facade side, it can happen that the bristles bend at the point where they are connected to the facade side, loosen from their fastening means or even break off. Due to the inclination of the facades, the force on the bristles can be transmitted to the facade side or the inclined part of the facade side, so that damage to the bristles can be avoided.

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

If the angle is smaller than the suggested range, it may happen that the contact pressure of the bristles on the facade is too low for the bristles to form a sufficient transition for the water from the facade into the channel. If the bristles are too flat, the water would not be optimally diverted into the channel.

If the angle is larger than the suggested range, it can happen that the contact pressure of the bristles on the facade is too great and the bristles on the facade bend, snap off or are damaged in some other way. In each of these cases, an optimal flow of water from the facade into the gutter would not be guaranteed.

In one embodiment, a film is wrapped around the bristles or around the bristles and at least part of the side of the facade. For this purpose, the film can preferably be in the form of a strip which is wrapped around the bristles in the longitudinal direction over the entire length of the channel. Folding in the sense of the invention means that the foil covers the bristles or the bristles and at least a part of the facade side on two sides. The film is arranged in particular between the bristles and the facade and is held in place by the contact pressure of the channel. The foil also covers the upper side of the slanted bristles so that the water is guided from the facade over the foil into the gutter.

The foil advantageously improves the drainage of the water from the facade into the channel, since the foil covers the smallest gaps between the bristles, in particular the gaps between their lower ends, and prevents water from seeping through between the bristles there.

The film can be, for example but not limited to, a polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyester, polycarbonate, polyethylene terephthalate, or other polyolefin film. In addition, films made from bio-based plastics, such as polylactide, cellulose acetate or starch blends, can also be used.

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

In one embodiment, the trough has a second outlet, the outlets being located at different ends of the trough along the longitudinal axis. However, the location of the channel does not necessarily have to have a level surface, so that the channel is crooked when it is positioned on the facade. In this embodiment, the channel can have bristles only on the facade side.

Advantageously, two drains located opposite each other ensure that the channel can be positioned on the facade with a slant in one direction or the other and the water can still flow out via one of the drains, namely the one that is lower down.

In one embodiment, the channel is open on one side so that it can be combined with a second channel via a connector or suitable connecting device to form a larger water collection device. In a further embodiment, the channel is kept open on both sides, so that it can be assembled as a center piece via two connecting pieces with two channels kept open on one side or with further channels open on both sides to form a water collecting device of any length. This modularity allows gutters to be assembled into a water collection device, the length of which can be adjusted to the length of the façade from which water is to be collected. The individual channels, for example with a length of approx. 2 m, can be easily transported and stored, but can also be used for wider facades.

The connecting pieces can be, for example, simple flanges with which two gutters are flanged together. The connecting pieces are preferably designed to be watertight, so that the water does not leak out of the water-collecting device between two channels or at the connecting piece.

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 and a filtration system for filtering the water collected by the gutter. The filter system is a multi-stage filter system and fluidically connected to the channel.

When cleaning facades, water washes away the dirt that may have built up over a longer period of time, for example years or even decades the facade has accumulated, down. The water is caught by the gutter or a water collection device made up of several gutters. The water with the dirt is then fed into the filter system, where it can be cleaned by the multi-stage filter system. If the dirty water has been cleaned sufficiently, the filtered water can be used again for cleaning the facade or other cleaning steps that occur, for example, on a construction site, or it can be stored for later use.

In one embodiment, the filter system includes five stages. The stages are arranged in such a way that the dirty water is first filtered with a filter with a first pore size. As the level 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 level.

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

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.

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.

In one embodiment, the filter system in the fourth stage comprises a carbon filter, in particular an activated carbon filter, with which chemicals and heavy metals are filtered out of the water.

In one embodiment, the filter system in the fifth stage comprises an ultra-fine filter with a pore size of 0.1 μm to 1 μm, preferably 0.5 μm.

In one embodiment, the individual filters, in particular the filter materials, are color-coded. The color coding of the filters has the advantageous effect that manipulation of the filters, in particular manipulation that is harmful to the overall system, can be detected. For example, it can be ensured that only suitable filters are used in the appropriate stage, so that the degree of purity of the filtered water indicated by the filter system is actually achieved. The use of improper filters can then be recognized by the wrong color, especially in the event of damage.

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

The filters prevent the water from simply flowing through the filter system. For the flow of water, they represent a resistance that must be compensated by a corresponding pressure. Advantageously, a pressure of 3 bar to 5 bar generated by a pump ensures that the water does not back up in the channel in front of the filter system.

In one embodiment, a wet suction device and an intermediate container are arranged in the flow direction of the water collected by the channel between the channel and the pump. The wet vacuum cleaner is configured to suck the water out of the gutter and direct it into the surge tank.

Pumps are prone to using inhomogeneous media. The water caught by the gutter might not be in sufficient quantity to be constantly pumped into the filter system by the pump. If there is not enough water in the gutter, the pump would also suck in air. The water-air mixture in the pump could lead to increased pump wear and/or damage to the pump.

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

Advantageously, the use of a wet vacuum cleaner and an intermediate container extends the service life of the pump.

In one embodiment, the surge tank includes 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 switches on the pump and the water is pumped from the intermediate tank into the filter system. The water level in the surge tank begins to drop. Reaches the fill level second threshold level, which is preferably below the first threshold level, the float switch switches the pump off again.

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

Advantageously, the use of a float switch causes the pump to run only when there is sufficient water to pump into the filter system. The operation of the pump is paused when there is not enough water in the intermediate tank. This not only protects the pump, but also reduces the energy consumption of the system.

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

• Figuren 1a, 1b und 1c zeigen das Profil verschiedener Rinnen.
• Figur 2 zeigt eine Ausführungsform der Rinne, bei der die Borsten und ein Teil der Fassadenseite mit einer Folie umschlagen sind.
• Figur 3 zeigt eine Vergrößerung des Kontaktbereichs zwischen der Rinne und der Fassade aus Figur 2.
• Figur 4 zeigt eine perspektivische Darstellung einer Rinne an einer Fassade.
• Figuren 5a, 5b und 5c zeigen Ausführungsformen der Rinne mit unterschiedlich positionierten Abflüssen.
• Figur 6 zeigt eine aus zwei Rinnen und einem Verbindungsstück zusammengesetzte Auffangvorrichtung.
• Figur 7 zeigt den schematischen Aufbau des Systems zum Auffangen und Reinigen von Fassadenwasser.
• Figur 8 zeigt den schematischen Aufbau und die Verbindungen zwischen einem Nasssauger, einem Zwischenbehälter und einer Pumpe.
• Figur 9 zeigt den schematischen Aufbau einer Filteranlage.

Further advantages, aims and properties of the invention are explained on the basis of the following description and attached drawings, in which objects according to the invention are shown by way of example. Features that at least essentially correspond in terms of their function in the figures can be identified with the same reference numbers, although these features do not have to be numbered and explained in all figures.

• Figures 1a, 1b and 1c show the profile of different gutters.
• figure 2 shows an embodiment of the channel in which the bristles and a part of the facade side are covered with a foil.
• figure 3 shows an increase in the contact area between the gutter and the facade figure 2 .
• figure 4 shows a perspective view of a channel on a facade.
• Figures 5a, 5b and 5c show embodiments of the channel with differently positioned drains.
• figure 6 shows a collecting device composed of two channels 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 the connections between a wet vacuum cleaner, an intermediate container and a pump.
• figure 9 shows the schematic structure of a filter system.

In the Figures 1a, 1b and 1c different channels 10 are shown in profile view. The channels 10 each include a rear side 12, a bottom 14 and a facade side 16. At the upper edge of the facade side 16 each bristles 18 are arranged. The direction in which the bristles 18 extend is inclined at an angle α with respect to a vertical plane, indicated here by the dashed line. Also in Figure 1c the bristles 18 are inclined by the angle α with respect to the vertical plane, the angle α is not shown merely for reasons of space.

The bristles 18 are in contact with a face 20. The face 20 has a rough surface. The tips of the bristles 18 lie in valleys or furrows. In one embodiment, the channel has bristles only on the facade side. In one embodiment, the channel has bristles only on the surface of the façade 20 on the façade side, so that a transition from the façade 20 to the channel 10 is produced. Water that runs down the facade 20 is diverted via the bristles 18 into the channel 10 and is caught by it.

The gutters 10 of 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 all the way to the vertical plane.

In Figure 1b the façade side comprises two areas. A first inclined area 22 is inclined at the angle α with respect to the vertical plane. A second vertical area 24 is aligned parallel or at least substantially parallel to the vertical plane.

The exact alignment of the facade side 16 is not important for the effect of the invention. In alternative, non-illustrated embodiments, for example, the floor 14 can be curved and merge continuously or with a curve into the facade side 16 . Furthermore, the facade side 16 can also be inclined at an angle other than the angle α with respect to the vertical plane.

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

figure 2 10 shows an embodiment of the gutter 10. FIG Figure 1a . The bristles 18 of the channel 10 and part of the facade side are covered with a film 26. The foil 26 can turn over the facade side 16 completely or, as shown here, only partially. Folding within the meaning of the invention means that the bristles 18 and at least part of the facade side 16 are covered with the foil 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 foil 26 covers the bristles 18 and prevents direct contact.

An enlargement of the contact point between the bristles 18 of the channel 10 and the facade 20 is in figure 3 shown. The bristles 18 serve to level out any unevenness on the facade surface. The tips of the bristles 18 can lie in small indentations, bumps or valleys in the facade surface. When using a solid or at least insufficiently flexible edge of a gutter, these bumps would result in small holes being formed between the facade 20 and the edge, through which the water can pass.

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 and thus close the transition from the facade 20 to the channel 10. The film 26 also closes the gaps between the bristles 18 in that the film 26 extends over part of the facade side 16 extends. The water therefore flows over the foil 26 into the channel 10.

figure 4 FIG. 12 is a perspective view of the gutter 10 according to the embodiment of FIG Figure 1a . In this embodiment, the gutter 10 has a drain 28 attached to one of the faces of the gutter 10 . The bristles 18 of the channel 10 are in contact with the facade 20 over the entire length along the longitudinal axis L.

Weights (not shown), such as sandbags, can be positioned at the rear 12 of the chute 10 to prevent the chute 10 from falling over, slipping, or otherwise moving unintentionally. By positioning the weights on the back 12 of the channel 10, the force with which the bristles 18 are pressed against the facade can also be adjusted.

The Figures 5a, 5b and 5c show various embodiments of the channel 10 Figures 5a, 5b and 5c gutters 10 shown have drains 28 that are positioned differently. The gutter 10 off Figure 5a has a drain 28 located on the left. The gutter 10 off Figure 5b has a drain 28 located on the right side of the gutter 10. The gutter 10 off Figure 5c has two drains 28, which are arranged along the longitudinal axis L on different sides of the channel 10.

In further, non-illustrated embodiments, the drain 28 or the drains 28 can also be arranged in the area of the floor 14 or in the floor 14 .

figure 6 shows a water collection device comprising two channels 10. The channels 10 are connected to one another via a connecting piece 30. The left gutter 10 has a drain 28 on its left side. The right gutter 10 has a drain 28 on its right side.

figure 7 shows a schematic representation of a system for cleaning water that is collected from a facade.

The system comprises a channel 10. The channel 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 a further fluidic connection 36, for example a hose or a pipe. The filter system 38 includes the multi-stage filter system 40 to which the fluidic connection 36 is connected. The system also includes an outlet 42 from which the filtered water exits. The outlet can, for example, be fluidically connected to a collection container (not shown here) or to a device for using cleaned facade water.

figure 8 FIG. 12 shows a schematic representation of the intermediate system 34. FIG figure 7 . The 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 through a fluidic Connection 46, for example a hose, pipe or tap, into an intermediate tank 48. The intermediate tank 48 includes a float switch 50 which floats on the surface of the water in the intermediate tank 48 if the intermediate tank 48 contains water. In figure 8 the intermediate container 48 is shown as being filled with water. The water is indicated by the hatching.

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

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

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

Furthermore, the first threshold value and the second threshold value can be assigned to different filling levels, so that the pump 54 is not repeatedly switched on and off again within a short time because the pump capacity of the pump 54 exceeds the flow from the channel 10 to the intermediate container 48. If the threshold values are different, with the second threshold value being associated with a lower filling level than the first threshold value, then the pump 54 is activated as soon as the filling level exceeds the first threshold value, for example 60 l, and is only deactivated when the filling level has reached the second Threshold, for example 10 l, has decreased.

figure 9 shows a schematic representation of the filter system 38. The filter system 38 comprises a multi-stage filter system, which is fed through the fluidic connection 36 with water. The water is pumped from the 54 (in figure 9 not shown) pumped with a pressure of preferably 3 bar to 5 bar in the filter system. In the illustrated embodiment, the filter system includes five stages.

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 intended to filter out 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 by a hose or a tube, for example. Alternatively, the fluid connection 60 can also be formed by a flange, so that the filter 62 is arranged fluidly directly behind the pre-filter 58 . A direct fluidic connection reduces the number of components required for the filter system 38 .

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

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 by a hose or a tube, for example. Alternatively, the fluid connection 64 can also be formed by a flange, so that the filter 66 is arranged fluidly directly behind the filter 62 .

The filter 66 is connected to a carbon filter 70 via a fluidic connection 68 . The charcoal filter 70 includes charcoal, specifically activated charcoal, to filter out heavy metals and chemicals from the water. The fluidic connection 68 can be formed, for example, by a hose or a tube. Alternatively, the fluidic connection 68 can be formed by a flange, so that the carbon filter 70 is arranged fluidly directly behind the filter 66 .

The charcoal filter 70 is connected to an ultra-fine filter 74 via a fluidic connection 72 . The ultra-fine filter 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 by a hose or a tube, for example. Alternatively, the fluid connection 72 can be formed by a flange, so that the ultra-fine filter 74 is arranged fluidly directly behind the carbon filter 70 .

The filter system 38 has an outlet 42 from which the filtered water can run out of the filter system 38 or be pumped out. The outlet 42 can be formed, for example, by a hose end, a water tap or a valve. <b>List of reference characters</b> 10 gutter 58 pre-filter 12 back 60 fluid connection 14 Floor 62 filter 16 facade side 64 fluid connection 18 bristles 66 filter 20 facade 68 fluid connection 22 inclined area 70 carbon filter 24 vertical area 72 fluid connection 26 foil 74 ultra-fine filter 28 drain 30 connector a angle 32 fluid connection f flow direction 34 intermediate plant L longitudinal axis 36 fluid connection 38 filter system 40 filter system 42 outlet 44 wet vacuum cleaner 46 fluid connection 48 intermediate container 50 float switch 52 fluid connection 54 pump 56 Electronic connection

Claims (15)

gutter (10) for collecting water from a facade, wherein the channel (10) has an elongate base body with a longitudinal axis (L), wherein the base body is formed at least from a facade side (16), a rear side (12) and a floor (14), wherein the channel (10) has at least one outlet (28) through which collected water can drain, the facade side (16) having an upper edge, characterized in that the upper edge of the facade side (16) is equipped with bristles (18), the bristles (18) being arranged perpendicular to the longitudinal axis (L) and extending away from the base body at an angle with respect to a vertical axis. Channel (10) according to Claim 1, in which the facade side (16) or a part thereof is inclined with respect to a vertical plane which runs parallel to the longitudinal axis (L) of the base body. Gutter (10) according to claim 2, wherein the inclination of the facade side (16) or a part thereof relative to the vertical plane is at an angle of 10° to 50°, preferably 20° to 40°, particularly preferably 30°. Gutter (10) according to one of the preceding claims, wherein the direction of extent of the bristles (18) is inclined relative to the vertical plane by an angle of 10° to 50°, preferably 20° to 40°, particularly preferably 30°. Gutter (10) according to one of the preceding claims, in which a film (26) is wrapped around the bristles (18) or around the bristles (18) and at least part of the facade side (16). A chute (10) as claimed in any preceding claim, wherein the chute (10) has a second outlet (28), the outlets (28) being located along the longitudinal axis (L) at different ends of the chute (10). system for treatment of water from a facade, comprising a gutter (10) according to any one of the preceding claims for collecting the water and a filter system (38) for filtering the water collected by the channel (10), the filter system (38) being a multi-stage filter system (40) and wherein the filter system (38) is fluidically connected to the channel (10) via the at least one outlet (28) of the channel. The system of claim 7, wherein the first stage comprises a pre-filter (58) having a pore size of 25 µm to 50 µm. A system according to any one of claims 7 to 8, wherein the second stage comprises one or two filters (62) having a pore size of 10 µm. A system according to any one of claims 7 to 9, wherein the third stage comprises a filter (66) having a pore size of 5 µm. System according to one of claims 7 to 10, wherein the fourth stage comprises a carbon filter (70), in particular an activated carbon filter, for chemicals and heavy metals. A system according to any one of claims 7 to 11, wherein the fifth stage comprises an ultrafine filter (74) having a pore size of 0.1 µm to 1 µm, preferably 0.5 µm. System according to one of Claims 7 to 12, a pump (54) being arranged in the flow direction of the water collected by the channel between the filter system (38) and the channel (10), the pump (54) being designed to pump the collected Pump water from the facade into the filter system (38) at a pressure of 3 bar to 5 bar. System according to claim 13, wherein a wet suction device (44) and an intermediate container (48) are arranged in the flow direction of the water collected by the channel (10) between the channel (10) and the pump (54),
wherein the wet vacuum cleaner (44) is configured to suck the water out of the gutter (10) and to conduct it into the intermediate tank (48). The system of claim 14, wherein the surge tank (48) includes a float switch (50), the float switch (50) being configured to turn on the pump (54) when the level in the surge tank (48) exceeds a first threshold level, and turn off the pump (54) when the fill level in the intermediate container (48) falls below a second threshold level.

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