Device and method for cleaning a bath liquid from a container cleaning device

Description

1 / 17 DEVICE AND METHOD FOR CLEANING A BATH LIQUID FROM A CONTAINER CLEANING DEVICE

[001] The invention relates to a device for cleaning a bath liquid from a container cleaning device and to a method for cleaning a bath liquid from a container cleaning device.

[002] Container cleaning devices are commonly used in the state of the art to clean containers, for example, beverage containers and / or returnable bottles, and to remove labels from them. For this purpose, container cleaning devices generally have numerous container cells in which the containers are received and transported through different cleaning zones with cleaning baths.

[003] In cleaning areas, containers are treated with various bath fluids, such as mild bleach, bleach, warm and / or cool water, to remove impurities and / or loosen labels placed on the containers. Impurities and loose labels accumulate in the bath fluids of the respective cleaning zone, requiring regular or even continuous cleaning of the bath fluid. To clean the bath fluid, a filter unit, for example, in the form of a filter belt, is usually provided in the region of one or more of the cleaning baths. The bath fluid is passed through the filter unit, which also becomes clogged over time and, consequently, must also be regularly cleared of impurities or replaced, which is very laborious and time-consuming due to the typical size of a filter belt.

[004] To avoid replacing the filter unit, some known container cleaning devices already have means for rinsing the filter unit, which, however, can typically only be operated intermittently to avoid excessive water consumption and therefore do not allow for complete cleaning of a sieve belt. Alternatively, perennial rinsing must be performed, which is associated with high water consumption. This high water consumption was acceptable in Petition 870250093239, dated 10 / 13 / 2025, page 12 / 36 Last February 17th, but it is increasingly no longer desired by operators of container cleaning devices due to increased environmental awareness.

[005] From this, the objective of the invention is to provide a device for cleaning a bath liquid from a container cleaning device, which enables simple, consistently efficient and water-saving cleaning of the bath liquid from a container cleaning device.

[006] According to the invention, the objective is achieved by a device according to claim 1 and by a method according to claim 9. Additional advantageous configurations of the invention are presented in the dependent claims.

[007] The device according to the invention for cleaning a bath liquid from a container cleaning device has a circulation-driven sieve belt that has an upper passage and a lower passage. According to the invention, the upper passage is provided for filtering and / or removing impurities from a bath liquid passed through the sieve belt of at least one cleaning bath of the container cleaning device. According to the invention, the device has a spray unit disposed between the lower passage and the upper passage to shower the sieve belt with a cleaning liquid, as well as a collection container disposed below the lower passage and / or below the spray unit to collect and subsequently reuse the cleaning liquid dispensed by the spray unit.

[008] The inventors recognized that the bath liquid of the container cleaning device can be easily and quickly freed from impurities, for example, dirt particles or label residue, by filtering through the upper passage of the sieve belt. The spray unit makes it possible, by showering the cleaning liquid in one direction Petition 870250093239, dated 10 / 13 / 2025, page 13 / 36 3 / 17 through the sieve belt opposite to the flow direction of the bath liquid, easy and efficient cleaning of the sieve belt is achieved, reducing bath liquid residue on the sieve belt and decreasing residual alkalinity. This allows, in particular, the use of plastic elements to guide the sieve belt, for example, sliding elements or sealing elements made of plastic. Furthermore, the inventors recognized that the arrangement of the spray unit between the lower and upper passages, as well as a collection container below the lower passage, allows for additional use of the cleaning liquid, for example, to fill one of the cleaning baths, thus significantly reducing the water consumption of the container cleaning device.

[009] Although the device according to the invention for cleaning a bath liquid may basically be a self-contained device independent of a container cleaning device, it is preferred that the device according to the invention be integrated into a container cleaning device. Preferably, the device for cleaning a bath liquid is disposed within a housing of the container cleaning device.

[010] Basically, a container cleaning device can be any installation for cleaning containers. For this purpose, the container cleaning device preferably has a plurality of cleaning baths with one or more different bath liquids, for example, bleach, hot water, or fresh water. Basically, the containers can be any receptacles, preferably made of plastic or glass, and / or designed to hold food and, in particular, a beverage. Therefore, the containers are preferably bottles. Furthermore, the containers are preferably reusable bottles, particularly glass or Petition 870250093239, dated 10 / 13 / 2025, page 14 / 36 4 / 17 plastic.

[011] According to the invention, the sieve belt is provided for filtering impurities from the bath liquid. Basically, a sieve belt is understood as a body that is suitable for retaining impurities from the bath liquid on a surface and allowing the bath liquid to pass through. For example, the sieve belt has a sieve surface extending between edge elements or, in each case, a side guide chain and is perforated with a multiplicity of openings. The sieve belt preferably has a plurality of sieve elements arranged at a distance from each other in the direction of travel of the sieve belt to filter impurities. For example, the sieve elements are each arranged at the ends of the sliding elements and are each arranged with the sliding elements in a guide.Preferably, the screen belt is guided by guides in the upper and lower passages, at least in the region of the spraying unit.

[012] The upper passage and the lower passage define two sections of the sieve belt running freely at a distance from each other. According to the invention, the sieve belt is driven in a circular manner, whereby it is understood that the sieve belt is deflected on at least one deflection roller and preferably on at least two deflection rollers and is driven by means of a drive unit, for example, an electric motor. The sieve belt has an upper side and a lower side facing away from the upper side in all sections.

[013] The upper passage has a first upper section and a first lower section facing away from the first upper section. The first upper section is preferably positioned above the first lower section relative to the operating position of the device. The lower passage has a second upper section and a second lower section facing away from the second upper section. The second upper section is Petition 870250093239, dated 10 / 13 / 2025, page 15 / 36 5 / 17 preferably located below the first and / or second lower section relative to the operating position of the device. The lower sections are preferably arranged facing each other, particularly due to at least one deflection of the sieve belt. Furthermore, the lower passage, at least in the region of the spraying unit, is preferably arranged at an angle between 0° and 50°, preferably between 0° and 35°, more preferably between 0° and 20°, relative to the upper passage. Above all, preferably, the lower passage is arranged parallel to the upper passage, at least in the region of the spraying unit.

[014] A spray unit is basically understood to be a unit that is provided for dispensing cleaning fluid onto the screen belt and for showering the screen belt. The spray unit is designed to free the screen belt from filtered impurities from the bath fluid. For this purpose, the spray unit dispenses cleaning fluid, for example, water, in the direction of the screen belt, particularly in the lower passage of the screen belt. Preferably, the spray unit is designed to dispense the cleaning fluid essentially along the entire width of the screen belt. Similarly, preferably, the spray unit has at least one outlet opening for dispensing the cleaning fluid.The outlet opening is preferably formed and arranged so that the cleaning liquid is sprayed onto the sieve belt, particularly in a manner substantially perpendicular to a surface of the sieve belt. Furthermore, the outlet opening is more preferably formed as a nozzle, so that the cleaning liquid is dispensed from the spray unit under pressure, particularly a pressure of 1-6 bar and preferably 2-5 bar, and / or directed towards the sieve belt, particularly the lower passage of the sieve belt. Petition 870250093239, dated 10 / 13 / 2025, page 16 / 36 6 / 17

[015] The spraying unit preferably has at least two outlet openings arranged at a distance from each other in the direction of the longitudinal axis of the spraying unit. More preferably, the spraying unit has a plurality of outlet openings arranged at a distance, especially preferably at the same distance, from each other. It is particularly preferred that the outlet openings extend over more than 60% - 120%, preferably 80% - 100%, more preferably 95% - 100% of the length of the line element and / or width of the sieve belt.

[016] According to the invention, the spray unit is disposed between the lower passage and the upper passage. The spray unit is preferably disposed between the lower side sections of the lower passage and the upper passage and / or directed towards a lower section, particularly the lower passage. More preferably, the spray unit is disposed between the first lower section and the second lower section. Preferably, the spray unit is disposed closer to the lower passage, particularly the second lower section, than to the upper passage, particularly the first lower section. The spray unit is preferably disposed at a distance between 0 cm and 20 cm, more preferably between 1 cm and 15 cm and especially preferably between 2 cm and 10 cm from the second lower section.

[017] Between the spray unit and the upper passage, a separation element is preferably arranged to collect impurities, particularly label residues, that are accidentally released from the upper passage or pass through the upper passage. For example, the separation element is formed in the shape of a mudguard.

[018] The collection container is basically a component that is provided to collect the cleaning liquid dispensed from the spray unit onto the sieve belt and sprayed through the belt. Petition 870250093239, dated 10 / 13 / 2025, page 17 / 36 7 / 17 sieve. For this purpose, the collection container has an inlet opening on its upper side or on a side facing the sieve belt and the spray unit, which preferably extends along the entire upper side of the collection container. More preferably, the inlet opening has a rectangular shape. In addition, the collection container preferably extends at least along the entire width of the sieve belt and the spray unit and more preferably projects beyond it. Also preferably, the collection container has a parallelepiped shape, in which more preferably the width transverse to the direction of circulation of the sieve belt is longer than the length parallel to the direction of circulation. For additional use of the cleaning liquid, the collection container is connected, for example, to a cleaning bath of the container cleaning device or in the spray unit circuit.

[019] According to an advantageous development of the invention, it is provided that the spraying unit is connected to the collection container so that the cleaning liquid collected in the collection container is reused to clean the lower passage. For this purpose, the collection container is preferably connected to the spraying unit via a pump and / or a line, so that the cleaning liquid can be advantageously reused to clean the lower passage, thus enabling economical and resource-saving cleaning of the screen belt.

[020] However, over time, the cleaning fluid collects loose impurities from the sieve belt, so the cleaning fluid must be filtered as the operating time of the device for cleaning a bath fluid increases. For example, a filter unit for filtering the cleaning fluid before reuse can be arranged on the pump and / or line connecting the collection container to the spray unit. According to an advantageous configuration of the invention, however, it is provided that Petition 870250093239, dated 10 / 13 / 2025, page 18 / 36 8 / 17 A sieve body placed in the collection container is positioned to filter the cleaning liquid passed through the sieve belt, so that impurities can be removed from the cleaning liquid in a simple way.

[021] Basically, a sieve body is understood to be a body that is provided for separating impurities, particularly label residues, from the cleaning liquid. The sieve body is preferably formed for mechanical filtration of the cleaning liquid. The sieve body preferably has a sieve surface with a plurality of openings that penetrate the sieve surface to allow the cleaning liquid to pass through. Furthermore, the sieve body is preferably formed from a metal. Also preferably, the sieve body is disposed on a lower side or in the bottom region of the collection container, so that the sedimented impurities remain in the sieve body. Most preferably, the sieve body extends essentially along the entire lower surface of the collection container.Through the sieve body, the cleaning liquid can be efficiently and easily filtered during collection through the collection container, thus freeing it from impurities.

[022] According to an advantageous embodiment of the invention, the collection container and / or the sieve body is provided to be formed in such a way that the sieve body can be adjusted between an operating position and a removal position. In the operating position, the sieve body is arranged in the collection container in such a way that the sieve body, particularly the sieve surface of the sieve body, extends over the entire cross-section of the inlet opening and can thus collect all the cleaning liquid that enters the collection container and / or cleaning liquid dispensed by the spray unit. In the removal position, the sieve body can be removed from the collection container and / or the device for cleaning in order to remove the filtered impurities from the cleaning liquid and / or in order to clean and / or replace the sieve body. Petition 870250093239, dated 10 / 13 / 2025, page 19 / 36 9 / 17

[023] Preferably, the sieve body and / or the collection container has at least one support element to support the sieve body in the operating position and / or to guide the sieve body during adjustment between the operating position and the removal position or vice versa. During adjustment between the operating position and the removal position, the sieve body is preferably moved along a path of movement arranged parallel to the longitudinal axis of the spraying unit. The support element is preferably formed in such a way that, in the operating position, the sieve body is arranged at a distance from the base of the collection container. More preferably, the sieve body is formed as a sheet metal element and has tabs to guide and stabilize the sieve body. Because the sieve body is adjustable between the operating position and the removal position, simple and quick cleaning of the sieve body may be possible.

[024] According to an advantageous embodiment of the invention, the collection container is provided to have a locking unit that can be adjusted between a locking position fixing the sieve body in the operating position and a release position releasing the sieve body for adjustment between the operating position and the removal position. In the locking position, the locking unit prevents the sieve body from being adjusted from the operating position to the removal position. In the release position, the locking unit releases the sieve body for removal from the collection container. The locking unit preferably has a locking element that, in the locking position, is engaged with the sieve body and / or a section of the collection container and is unengaged in the release position.Furthermore, the locking unit is preferably arranged in a housing plate connected to the sieve body and / or can be removed from the collection container along with the sieve body. For example, the locking unit is formed as a rotary lock. The locking unit allows for adjustment. Petition 870250093239, dated 10 / 13 / 2025, page 20 / 36 10 / 17 unwanted particles from the sieve body can be neutralized in a simple and reliable way.

[025] Basically, the collection container is sufficient to collect and reuse the cleaning liquid, wherein the collection container may either have a section for storing the received cleaning liquid in the lower region or may be formed in such a way that the collected cleaning liquid can be discharged directly and / or completely for later reuse. According to an advantageous embodiment of the invention, however, it is provided that the cleaning device has a reserve container connected to the collection container to expand the storage capacity of the collection container or to form a storage volume. The collection container preferably has an outlet opening, particularly for connection with the reserve container, which is more preferably disposed in the region of a lower end of a side wall of the collection container.The reserve container describes a component supplied to expand the storage capacity of the collection container and / or to store the cleaning fluid.

[026] More preferably, the collection container and / or reserve container are connected via a supply line to a bath located within a clean space of the container cleaning device. In addition, the spray unit of the device is preferably connected to the bath of the container cleaning device via the line and / or a pump, so that the spray unit can be operated with the cleaning fluid stored in the bath of the container cleaning device. Due to the fact that the collection container is connected to the reserve container and / or the bath of the container cleaning device, a particularly large quantity of cleaning fluid can be stored.

[027] The spraying unit according to the invention is basically sufficient to clean the sieve belt of impurities. No Petition 870250093239, dated 10 / 13 / 2025, p. 21 / 36 11 / 17 However, preferably, in the lower and / or upper passage, a cleaning unit is arranged upstream of the spraying unit in the direction of travel of the sieve belt to remove coarse impurities from the sieve belt. More preferably, the cleaning unit is formed to mechanically clean the sieve belt. For example, the cleaning unit may be formed as a scraping or metal drag strip. According to an advantageous embodiment of the invention, however, it is provided that a cleaning roller for removing coarse impurities from the sieve belt is arranged upstream of the spraying unit in the direction of travel of the sieve belt. The cleaning roller is preferably formed in such a way that coarse impurities, particularly label residues, adhering to the lower passage, particularly to the second upper section of the lower passage, are removed.The cleaning roller preferably has a plurality of cleaning elements extending radially from a longitudinal axis of the cleaning roller to remove coarse impurities. The cleaning elements are preferably made from a plastic. The cleaning roller can be driven in rotation by means of a drive, preferably against the direction of travel of the screen belt. More preferably, the cleaning roller is formed as a brush roller. The cleaning roller enables simple and reliable pre-cleaning of the screen belt before showering with the cleaning liquid, thus the screen body clogs more slowly and can be used without replacement for a long period of time.

[028] The method according to the invention for cleaning a bath liquid from a container cleaning device can be carried out particularly with the device described above and comprises, as method steps, guiding a bath liquid from a cleaning bath to a circulation-driven sieve belt with an upper pass and a lower pass, filtering and / or removing impurities from the bath liquid. Petition 870250093239, dated 10 / 13 / 2025, page 22 / 36 12 / 17 through the upper passage of the sieve belt, shower the sieve belt with a cleaning liquid by means of a spray unit located between the lower passage and the upper passage, collect the cleaning liquid in a collection container located below the lower passage and / or the spray unit and reuse the cleaning liquid dispensed by the spray unit and collected in the collection container.

[029] The cleaning fluid collected in the collection container can basically be reused in any desired way within the container cleaning device. Preferably, the cleaning fluid collected in the collection container is reused to clean the lower passage.

[030] An exemplary embodiment of the device according to the invention and of the method according to the invention is explained below with reference to the drawings. In the figures: Fig. 1 a side view of a device for cleaning a bath liquid from a container cleaning device; Fig. 2 a perspective view of the device in Fig. 1; Fig. 3a a perspective view of the device of Figs. 1 and 2 with a sieve body arranged in an operating position, Fig. 3b a perspective view of the device in Fig. 1 - 3a with the sieve body arranged in a removal position, Fig. 4 a side view of a container cleaning device with the device of Fig. 1-3.

[031] Figure 1 shows, in schematic representation, a side view of a device for cleaning 1 a bath liquid from a container cleaning device 2.

[032] Device 1 has a circulation-driven sieve belt 3 with an upper passage 4 and a lower passage 5. In addition, device 1 has a spray unit 6 disposed between the lower passage 5 and the upper passage 4 and a collection container 7 disposed below the lower passage 5 and the spray unit 6. Petition 870250093239, dated 10 / 13 / 2025, page 23 / 36 13 / 17

[033] The sieve belt 3 has a plurality of sieve elements 30 arranged at a distance from each other in the direction of travel of the sieve belt 3 to filter out impurities. The sieve elements 30 are each arranged at the ends of the sliding elements 31 and are each arranged with the sliding elements 31 in a guide 32, wherein the sieve belt 3 is guided in the guides 32 in the upper passage 4 and in the lower passage 5, at least in the region of the spraying unit 6. Furthermore, the sieve belt 3 is deflected on the deflection rollers 33 and driven by means of a drive unit not shown in the figures.

[034] The upper passage 4 has a first upper section 8 and a first lower section 9 facing away from the first upper section 8. The first upper section 8 is positioned above the first lower section 9 relative to the operating position of the device 1. In the operating position, the upper passage 4 is positioned horizontally. The lower passage 5 has a second upper section 10 and a second lower section 11 facing away from the second upper section 10. The second upper section 10 is positioned below the first and second lower sections 9, 11 relative to the operating position of the device 1. The lower passage 5 is positioned in the region of the spraying unit 6 parallel to the upper passage 4.

[035] The spray unit 6 is arranged between the first lower section 9 and the second lower section 11. Furthermore, the spray unit 6 is arranged closer to the second lower section 11 than to the first lower section 9. A separating element in the form of a mudguard 12 is arranged between the spray unit 6 and the upper passage 4.

[036] The spraying unit 6 has a line element 13 and a plurality of outlet openings in the form of nozzles 14 arranged at a distance from each other essentially along the entire length of the line element 13, wherein the nozzles 14 are directed towards the second Petition 870250093239, dated 10 / 13 / 2025, page 24 / 36 14 / 17 lower section 11 of the lower tape 4.

[037] The collection container 7 is disposed at a distance from the second upper section 10 of the lower passage 4. Furthermore, the collection container 7 extends in the direction of a longitudinal axis L of the spraying unit 6 along the entire length of the guide element 13 of the spraying unit 6 and has an inlet opening 15 with a rectangular cross-section 16 extending parallel to a longitudinal axis L of the spraying unit 6.

[038] Device 1 also has a sieve body 17 disposed in the collection container 7 which, as shown in Figure 2, has a sieve surface 18 with a plurality of openings 19 penetrating the sieve surface 18. The sieve body 17 is adjustable between an operating position shown in Figure 3a and a removal position shown in Figure 3b. The collection container 7 has a support element 20 to support the sieve body 17 in the operating position and to guide the sieve body 17 during adjustment between the operating position and the removal position.

[039] In addition, the collection container 7 has a locking unit in the form of a rotary latch 22 disposed in a housing plate 21 connected to the sieve body 17. The rotary latch 22 is adjustable between a locking position fixing the sieve body 17 in the operating position and a release position releasing the sieve body 17 for adjustment between the operating position and the removal position.

[040] The collection container 7 is connected via a supply line 23 to a bath 24 disposed within a clean space 29 of the container cleaning device 2. The spray unit 6 is connected to the bath 24 of the container cleaning device 2 via a pump 25, so that the spray unit 6 is operated with the cleaning liquid stored in the bath of the container cleaning device 2. Petition 870250093239, dated 10 / 13 / 2025, page 25 / 36 15 / 17

[041] In addition, device 1 has a cleaning roller 26 upstream of the spraying unit 6 in the direction of travel of the sieve belt 3 with a plurality of cleaning elements 27 extending radially from a longitudinal axis LR of the cleaning roller 26 to remove coarse impurities from the sieve belt 3.

[042] With device 1, a method can be implemented to clean the bath liquid of the container cleaning device 2. The bath liquid is passed from a cleaning bath 28 of the container cleaning device 2 to the sieve belt 3. Through the upper passage 4, impurities are filtered out of the cleaning liquid and removed. Subsequently, the cleaning roller 26 removes coarse impurities from the second upper section 10 of the lower passage 5. The sieve belt 3 is subsequently showered by means of the spray unit 6, where the cleaning liquid is sprayed through the nozzles 14 in the second lower section 11 of the lower passage 5. The cleaning liquid is finally collected in the collection container 7, filtered through the sieve body 17, and passed through the supply line 23 to the bath 24 of the container cleaning device 2.For reuse in spray unit 6, the cleaning fluid is transported via pump 25 from bath 24 to spray unit 6.

[043] The shower of the screen belt 3 with the cleaning liquid by means of the spray unit 6 located between the lower passage 5 and the upper passage 4 enables simple and efficient cleaning of the screen belt 3. As a result, the bath liquid residues found on the screen belt 3 are reduced and the residual alkalinity is decreased. This makes it possible to use plastic elements, for example, sliding elements 31 or sealing elements, for the guide 32 of the screen belt 3. List of reference signs Device for cleaning bathwater Petition 870250093239, dated 10 / 13 / 2025, pp. 26 / 36 16 / 17 Container cleaning device Sieve belt Overpass Underpass Spraying unit Collection container First upper section First bottom section Second upper section Second lower section Separation element / mudguard Line element Outlet opening / nozzle Entrance opening Cross-section of the entrance opening. Sieve body sieve surface Opening Supporting element Housing plate Rotating closure Supply line Bath Pump Cleaning roller Cleaning element Cleansing bath Clean space Sieve element Sliding element Petition 870250093239, dated 10 / 13 / 2025, page 27 / 36 17 / 17 Guide Deflection rollers L Longitudinal axis of the spraying unit LR Longitudinal axis of the cleaning roller Petition 870250093239, dated 10 / 13 / 2025, pp. 28 / 36

Claims

1 / 3 CLAIMS 1. Device for cleaning a bath liquid (1) from a container cleaning device (2) characterized in that it comprises - a circulation-driven sieve belt (3) having an upper passage (4) and a lower passage (5), wherein the upper passage (4) is provided for filtering and / or removing impurities from a bath liquid passed from a cleaning bath (28) of the container cleaning device (2) to the sieve belt (3), - a spray unit (6) disposed between the lower passage (5) and the upper passage (4) for showering the sieve belt (3) with a cleaning liquid and - a collection container (7) disposed below the lower passage (5) and / or the spray unit (6) for collecting and subsequently reusing the cleaning liquid dispensed by the spray unit (6).

2. Device according to claim 1, characterized in that the spray unit (6) is connected to the collection container (7) so that the cleaning liquid collected in the collection container (7) is reused to clean the lower passage (5).

3. Device, according to any of the preceding claims, characterized in that a sieve body (17) disposed in the collection container (7) to filter the cleaning liquid passed through the sieve belt (3).

4. Device according to claim 3, characterized in that the collection container (7) and / or the sieve body (17) is formed in such a way that the sieve body (17) is adjustable between an operating position and a removal position.

5. Device, according to claim 3 or 4, characterized in that the collection container (7) has a locking unit (22) that is adjustable between a locking position that fixes the sieve body (17) in the operating position and a release position that releases the sieve body (17) for adjustment between the operating position and the removal position.

6. Device, according to any of the preceding claims, characterized in that a reserve container is connected to the collection container (7) to expand the storage capacity of the collection container.

7. Device, according to any of the preceding claims, characterized in that the collection container (7) and / or the reserve container is connected by a supply line (23) to a bath (24) disposed within a clean space (29) of the container cleaning device (2).

8. Device, according to any of the preceding claims, characterized in that a cleaning roller (26) upstream of the spraying unit (6) in the direction of travel of the sieve belt (3) to remove coarse impurities from the sieve belt (3).

9. Method for cleaning a bath liquid from a container cleaning device (2) characterized in that it comprises the steps of - guiding a bath liquid from a cleaning bath (28) to a circulation-driven sieve belt (3) having an upper passage (4) and a lower passage (5), - filtering and / or removing impurities from the bath liquid by means of the upper passage (4) of the sieve belt (3), - showering the sieve belt (3) with a cleaning liquid by means of a spray unit (6) disposed between the lower passage (5) and the upper passage (4), - collecting the cleaning liquid in a collection container (7) disposed below the lower passage (5) and / or the spray unit (6) and Petition 870250093239, dated 10 / 13 / 2025, page 30 / 36 3 / 3 - reusing the cleaning liquid dispensed by the spray unit (6) and collected in the collection container (7).

10. Method according to claim 9, characterized in that the cleaning liquid collected in the collection container (7) is reused to clean the lower passage (5) by means of the spray unit (6). Petition 870250093239, dated 10 / 13 / 2025, pp. 31 / 36

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