Retrofit kit for a liquid collection system and trolley with such a system

Abstract

Retrofit kit for a liquid collection arrangement (10) for retrofitting in a trolley (1) of a passenger transport vehicle, designed for the safe collection and / or disposal of liquids accumulating on board, comprising: at least one filling opening (14) opening towards an outside (4) of the trolley (1), a liquid collection chamber (12), prepared for arrangement in an interior space of the trolley (1); and wherein a backflow prevention device (11) is arranged in the liquid collection chamber (12), which is designed to prevent a liquid poured into the liquid receiving arrangement (10) from spilling out.

Description

Field of invention

[0001] The present invention relates to a retrofit kit for a liquid intake arrangement, and to a trolley with a liquid intake arrangement. Background and general description of the invention

[0002] Trolleys with solid material collection containers, designed for use in passenger transport vehicles, are generally known. For example, DE 102022119747 B4 from the applicant's company, which is hereby incorporated as a reference, shows a trolley comprising a solid material collection container.

[0003] Furthermore, containers for the disposal of liquids, especially those designed for use in trolleys for passenger transport, are generally known. WO 2013 / 150259 A 1 and CN 215155693 U, for example, show trolleys in which liquid can be collected inside. DE 10 2016 103 376 A1 also shows a trolley in which liquid can be collected on the outside of the trolley, allowing it to be detached.

[0004] One problem with currently available liquid collection containers is that the liquid, which should be separated from other waste for both economic and environmental reasons, can slosh around inside the container. This can lead to the liquid leaking out, shifting the trolley's center of gravity, causing it to rock or, in extreme cases, tip over. The way the collected liquid is attached and / or arranged also needs improvement.

[0005] Furthermore, turbulence can occur repeatedly in passenger transport, which can make pouring liquid into a container extremely difficult. This can lead to some of the liquid spilling out of the container and onto the floor, which can cause significant damage, especially in aircraft, as the liquid may find its way into the fuselage.

[0006] Against this background, the inventors of the present application have described numerous feasible approaches in the present description as to how improved liquid absorption on a trolley can look.

[0007] The problem is solved by the invention defined in the independent claims. Dependent claims describe further developments and preferred embodiments of the invention.

[0008] A retrofit kit for a liquid collection device for installation in a trolley of a passenger transport vehicle, designed for the safe collection and / or disposal of liquids accumulating on board, as described herein, comprises at least a filling opening opening towards the outside of the trolley, a liquid collection chamber designed for installation in the interior of the trolley, and a backflow preventer arranged in the liquid collection chamber, which is configured to prevent any liquid poured into the liquid collection device from spilling out. In other words, the backflow preventer prevents a fluid that enters the liquid collection device through the filling opening from escaping again.Such a liquid leak could occur, for example, if it splashes out during filling or if turbulence in the passenger transport vehicle causes such strong waves that it spills over.

[0009] The retrofit kit can further include at least one fluid guide body for transporting the liquid from the filling opening to the liquid collection chamber. This fluid guide body can comprise a channel, for example, a channel with a triangular or rectangular cross-section. Alternatively, or in addition, the fluid guide body can also comprise a hose. The hose can be elastic, for example, made of an elastic plastic or rubber, or rigid, for example, in the form of an aluminum tube. The fluid guide body can be positioned at an angle within the liquid intake assembly so that the filled fluids are drawn to the liquid collection chamber by gravity. Alternatively, the fluids can also be transported to the liquid collection chamber by means of overpressure or underpressure generated within the fluid guide body, particularly by a pump.For example, such a pump can be located in or on the liquid collection chamber. Furthermore, the pump can be equipped with a sensor to detect freshly added liquid or liquid present in the funnel or fluid guide. The pump can also be a diaphragm pump to assist in the drainage of the liquid. When using a pump, the filling opening can even be located slightly lower than the liquid collection chamber.

[0010] The backflow preventer of the retrofit kit can be a liquid-absorbing material designed to absorb liquid entering the liquid collection chamber. In other words, the backflow preventer can be a material that binds or absorbs the incoming fluids upon contact, so that the fluids are no longer in a liquid state within the liquid collection chamber. The backflow preventer can also include a check valve that allows fluids to enter from the filling direction but blocks backflow from the liquid collection chamber. Finally, the backflow preventer can be designed as a flow labyrinth. A flow labyrinth is a flow element with an inlet and an outlet, where the flow element has a channel structure with multiple flow deflections.The canal structure can be designed, for example, in a meandering, spiral or cascade shape.

[0011] The liquid-absorbing material in the liquid collection chamber can, in one version, comprise superabsorbent polymers (SAPs). Alternatively, or additionally, the liquid-absorbing material can comprise mineral absorbers, such as bentonite, montmorillonite, perlite, zeolites, and / or diatomaceous earth. Furthermore, the liquid-absorbing material can also comprise natural, organic absorbers, such as cellulose, sphagnum moss, starch-based polymers, and / or plant fibers, and / or hydrophobic absorbers, such as polypropylene nonwoven fabric, wax-impregnated cotton, or aerogels.

[0012] The liquid collection compartment can be positioned in and / or on the trolley in such a way that solid materials can be thrown through into the trolley, for example, even past the liquid collection compartment. In other words, the size and placement of the liquid collection compartment relative to or within the trolley can be designed so that there is sufficient free interior space for solid materials to be thrown past the liquid collection compartment into the trolley or a recycling container located within the trolley.

[0013] The retrofit kit may further include a maintenance access point, in particular for inserting or removing the backflow preventer from the liquid collection chamber, especially designed as a maintenance hatch or mass retention system. The maintenance access point thus provides the operator with unimpeded access to the liquid collection chamber and is designed in a size that allows the entire backflow preventer to be removed without deforming or damaging it.

[0014] Furthermore, the retrofit kit can include a removable bag or container for holding the absorbent material. In other words, the absorbent material can be arranged in a fluid-tight bag or container within the liquid collection chamber, so that when changing or disposing of the absorbent material, only the bag or container containing it needs to be removed or inserted.

[0015] The liquid collection device and the liquid collection chamber can be removable from the trolley. In other words, the liquid collection device can be designed and / or equipped with a mechanism that allows it to be easily removed from the trolley. Similarly, the liquid collection chamber can also include a mechanism that allows it to be easily removed from the trolley.

[0016] Furthermore, the filling opening can be designed as a funnel, meaning it has a wide liquid inlet and then narrows conically towards the liquid outlet. The filling opening can also include a trough and / or a collection basin. The trough and the collection basin can be inclined so that the fluids flow towards the liquid collection chamber under their own weight. The collection basin can also be surrounded by walls that prevent the liquids from overflowing.

[0017] The filling opening of the liquid collection device can also be designed to swivel outwards, meaning it can be swung out from the trolley, so that it has at least one retracted position and at least one extended position, with the extended position facilitating the filling of liquids. Alternatively, the filling opening can be designed to be retractable, meaning it can be pulled out from the trolley, so that it has at least one retracted position and at least one extended position, with the extended position facilitating the filling of liquids. Finally, the filling opening can be designed as an insert that can be attached to or placed on the liquid collection chamber. In other words, the filling opening can be designed so that it can be attached to or placed on the trolley.The filling opening is preferably connected to the liquid collection chamber directly in the assembled state or indirectly via at least one fluid guide hollow body.

[0018] The liquid collection chamber can, in one embodiment, have a volume of 10 liters or less, preferably 5 liters or less, and more preferably 3 liters or less. For example, it can have a depth of 90 mm, a width of 275 mm, and a length of 200 mm. In another embodiment, the liquid collection chamber can have a volume of 0.5 liters or more, preferably 1 liter or more, and more preferably 2 liters or more.

[0019] Furthermore, the liquid collection chamber and / or the filling opening can include a splash guard lip, which prevents the liquid from sloshing out or splashing during filling and / or when flowing into the liquid collection chamber. In other words, a splash guard lip can be attached to the outer walls of the liquid collection chamber or the filling opening, which projects into or outwards into the interior of the liquid collection chamber or the filling opening in such a way that it prevents the fluid from splashing out over the outer walls. Simultaneously or alternatively, the underside of the liquid collection chamber can be angled to prevent the liquid from splashing out during filling. This means that the underside of the liquid collection chamber or the filling opening has an angle such that the filled fluid is directed away from the opening and does not splash back out.

[0020] The filling opening can further include a closing mechanism, which in particular comprises a movable lid and / or, in the open state, a funnel. In other words, the filling opening can be closed, i.e., covered, by a closing mechanism. This closing mechanism can have an open and a closed state, so that liquids can only be filled when the opening is open. The closing mechanism can be made of an elastic material that, when opened, can be shaped into a filling opening, for example, a funnel, and when closed, can be shaped back into a lid.

[0021] The present invention also describes a trolley for use in a means of passenger transport, comprising an interior space and a recyclable material or solids collection container arranged within the interior space for collecting recyclable materials, waste, or other solids generated on board. The solids can be introduced into the solids collection container by the operator through a loading opening, for example, by throwing them in. The trolley also includes a liquid collection arrangement, particularly as described above, wherein the liquid collection arrangement is configured for the safe collection and / or disposal of liquids generated on board. For this purpose, the liquid collection arrangement comprises at least one filling opening opening towards an outside of the trolley and a liquid collection chamber arranged within the interior of the trolley.The liquids can be introduced into the liquid collection arrangement through the filling opening and are collected in the liquid collection chamber. Furthermore, the liquid collection arrangement includes at least one fluid guide hollow body for transporting the liquids from the filling opening to the liquid collection chamber located inside the assembly. A backflow preventer is arranged in the liquid collection chamber, designed to prevent the spillage of any liquid from the liquid collection container. The backflow preventer can be located at the inlet of the liquid collection chamber or within the interior of the liquid collection chamber.

[0022] The liquid collection chamber and / or the filling opening of the liquid collection arrangement can be located above the waste collection container, i.e., above the opening of the solids collection container.

[0023] Furthermore, the filling opening and / or the liquid collection device can be designed to be pivoted and / or pulled out of the trolley. In other words, the filling opening and / or the liquid collection device can be pivoted and / or pulled out of the trolley and pivoted and / or pushed into the trolley, so that it has at least one pivoted / extended position and at least one pivoted / retracted position. The pivoting and / or pulling out of the filling opening and / or the liquid collection device can be carried out by an actuating mechanism. The actuating mechanism can, in particular, include at least one lever. In other words, by actuating a lever, the filling opening and / or the liquid collection device can be pivoted or pulled out of the trolley.Furthermore, the actuation mechanism can in particular include at least one button, i.e., the swiveling or pulling out of the filling opening and / or the liquid intake arrangement can be activated by pressing a button.

[0024] A trolley can further include at least one drip tray. The drip tray is designed, for example, to cover the gap between the solids collection container and at least one side wall and / or the liquid collection device and at least one side wall. The drip tray thus acts as a kind of cover strip for a gap that may exist between the solids collection container and / or liquid collection device and the side wall of the trolley, preventing fluids from entering this gap. The drip tray can therefore be designed to direct spilled fluid, which does not find its way into the liquid collection container but enters the interior of the trolley, into the solids collection container.

[0025] The trolley's waste or solids collection container can be designed to be fluid-tight, meaning that any fluids it contains cannot leak out. Alternatively, or in addition, a fluid-absorbing material can be incorporated into the waste or solids collection container. This redundant sealing or fluid absorption ensures that any fluid accidentally entering the solids collection container cannot escape from it or from the trolley itself, thus preventing it from entering the aircraft and potentially causing significant damage.

[0026] A trolley and / or liquid collection arrangement as described herein may also include a level indicator for displaying the fill level of the liquid collection chamber. For example, the level indicator may comprise a closed display chamber, which is visible from the outside through a transparent material, such as glass. The display chamber may be designed to allow liquid to enter, thus enabling the display to be performed directly by visual inspection of the liquid. Alternatively, the display chamber may be designed without any liquid-absorbing material, so that the fluid remains liquid.

[0027] The liquid collection chamber may include a seal on its upper surface that seals it against the trolley. For example, a rubber seal may be fitted to the top of the liquid collection chamber, which presses against the trolley when the liquid collection chamber is inserted into the trolley.

[0028] When inserting the liquid collection device or fluid collection chamber into the trolley, the liquid collection device, for example the fluid collection chamber, can press against the seal to create a tight seal.

[0029] The liquid collection chamber can also form a positive-locking connection with the trolley when inserted into it, sealing the liquid collection chamber against the trolley. In other words, the liquid collection chamber can be designed so that, when inserted into the trolley, no gap exists between the liquid collection chamber and the trolley through which fluids could penetrate or pass.

[0030] Finally, the trolley can include at least two separate recycling containers for separating recyclables. In other words, the trolley can contain two or more separate solid waste containers. For example, a trolley could include one container for recyclables and a separate container for waste, or containers for two different recyclables. A waste collection device could be used, as proposed in 10 2022 119 747 B1, which is hereby incorporated by reference.

[0031] The invention will now be explained in more detail with reference to exemplary embodiments and the figures, whereby identical and similar elements are partially provided with the same reference numerals and the features of the different exemplary embodiments can be combined with one another. Brief description of the characters

[0032] They show: Fig. 1. A liquid intake arrangement in side sectional view Fig. 2. The liquid intake arrangement with box in side view Fig. 3 the liquid intake arrangement in front view Fig. 4. The liquid intake arrangement, top view Fig. 5 a liquid intake arrangement in isometric view Fig. 6 a second embodiment of a liquid intake arrangement in isometric view Fig. 7 a third embodiment of a liquid intake arrangement in isometric view Fig. 8 a trolley with liquid collection arrangement in side sectional view Fig. 9 Another embodiment of a liquid intake arrangement in top view Detailed description of the invention

[0033] Referring to Fig. Figure 1 shows a liquid collection arrangement 10, which is arranged in the interior 3 of a trolley 1. A backflow preventer 11 is located in the liquid collection chamber 12 of the liquid collection arrangement 10, which is in Fig. 1 comprises a liquid-absorbing material that binds the liquid filled into the liquid collection arrangement 10 and thus prevents the liquid from splashing out. For example, the backflow preventer comprises a liquid-absorbing material and / or a material that thickens or gels the liquids filled into the liquid collection arrangement 10. The backflow preventer 11 is also contained in a bag 8, which is removable from the liquid collection chamber 12 and therefore easily replaceable. A seal 17 is attached to the top of the liquid collection chamber 12, which seals the liquid collection arrangement 10 against the trolley 1. Below the liquid collection chamber 12 is a cover strip 26, which prevents any liquids that leak during filling from running into the gap between the solids collection container 20 and the side wall 4 of the trolley 1. Fig. Figure 1 also shows a handle 13 arranged on the liquid collection chamber 12, by means of which the liquid collection chamber 12 and / or the entire liquid intake assembly 10 can be removed from and reinserted into the trolley 1. The inserted liquid collection chamber 12 can be securely fastened in the trolley 1 by means of the closure 25, preventing it from being pulled out. When the liquid collection chamber 12 is secured, it is pressed against the seal 17 by the closure 25 and thus sealed against the trolley 1.

[0034] Fig. 2 shows the execution from Fig. 1. In the side view, the same reference symbols describe the same features. Fig. Figure 2 shows the container lid 22 open and a box 23 placed on the lid. It can be seen that the box 23 covers part of the filling opening 14. A closing mechanism 15 is located on the uncovered part of the filling opening 14 of the liquid receiving arrangement 10. In the closed position, this mechanism is a movable lid that prevents the filling of liquids. In the open position shown, it can be formed into a funnel through which fluids can be filled.

[0035] In Fig. 3 is the design of the liquid intake arrangement 10 from Fig. Figure 1 shows the front view. Identical reference symbols describe the same features. The liquid collection container 12, designed as a drawer, is inserted in the trolley 1 and can be pulled out of the trolley using the handle 13. Also visible is the closure 25, which secures the liquid collection arrangement 10 in the trolley. The liquid collection container 12 is accessible and / or removable through an opening in a side wall 4 of the trolley 1. Fig. Figure 4 shows an embodiment of a liquid intake arrangement 10 in a trolley 1 analogous to the Fig. 1, Fig. 2 to Fig. 3 in the top view. The same reference symbols describe the same features. In Fig. Figure 4 shows that the container lid 22 can also be designed in such a way that, when closed, it does not cover the filling opening 12, thus allowing liquids to still be poured into the liquid receiving arrangement 10.

[0036] Fig. Figure 5 shows the design of the liquid intake arrangement 10. Fig. Figure 1 shows a trolley 1 from a top view. A filling opening 14 is visible, which in this case is designed as a collection basin. A splash guard 9 is located at the filling opening 14, which prevents the poured liquid from splashing out. The filling opening 14 is also located above the two solids collection containers 20 and 20a, which are completely enclosed by the side walls 4 of the trolley 1. Thus, despite the splash guard 9, any liquid that escapes reaches the solids collection container 20. When the liquid is poured into the filling opening 14, it flows from there via the fluid guide hollow body 16, which in this case is designed as a hose, into the liquid collection chamber 12, which is located below the filling opening 14.The container lid 22, which is located on the top of the trolley 2, can be closed via a hinge and thus conceals both the filling opening 14 of the liquid collection arrangement 10 and the solid collection containers 20 and 20a. When open, an additional element of the trolley, for example a tray, can also be placed on the container lid 22. Furthermore, an actuating mechanism 24 is attached to a side wall 4 of the trolley 1, by actuating which the filling opening 14 can be swung out.

[0037] In Fig. 6 is an embodiment of the liquid intake arrangement 10 in a trolley 1 analogous to the description of Fig. 2 with a filling opening 14 for filling the fluids, a fluid guide hollow body 16 and a liquid collection chamber 12. The fluid guide hollow body 16 and part of the filling opening 14 are shown in Fig. 6 is obscured by a box 23 located on the open container lid 22. This means that liquids can only be poured into the front part of the filling opening 14 that is not obscured by the box 23. It must therefore be ensured that part of the filling opening 14 always protrudes from below the box 23 and / or can be pulled or swung out from below the box 23. The filling opening 14 is also located above the solid collection containers 20 and 20a, so that any fluids accidentally overflowing or spilled are collected by these containers.

[0038] Fig. Figure 7 shows a third embodiment of a liquid collection arrangement 10 in a trolley 1 of a passenger transport vehicle. In this embodiment, the liquid collection arrangement 10 is designed as a drawer, which is recessed into a side wall 4 of the trolley 1. The liquid collection arrangement 10 contains the backflow preventer 11, which binds the fluids filled into the liquid collection container 12 through the filling opening 14. When closed, the liquid collection arrangement 10 can be sealed by the arrangement closure 18, thus preventing accidental opening. The trolley 1 has a solids collection container 20, which is located in Fig. 4 is concealed by the container lid 22 and placed behind the liquid intake arrangement.

[0039] In Fig. Figure 8 shows a trolley 1 with a liquid collection device 10. The trolley 1 has a bottom 6, to which wheels 28 are attached for moving the trolley 1, and a top 2, to which the container lid 22 is also attached. Furthermore, in this configuration, the trolley 1 has four side walls 4, so that the liquid collection chamber 12 of the liquid collection device 10, located in the interior 3 of the trolley 1, is surrounded on all sides by the side walls 4 of the trolley. For the removal of the backflow preventer 11, which is contained in Fig. 8 is concealed, a maintenance access 19 is provided in a side wall of the liquid collection chamber 12. This is in Fig. 8 designed as a maintenance hatch 19, which, when open, allows access to the liquid collection chamber 12.

[0040] Fig. Figure 9 describes a further embodiment of a liquid collection arrangement 10 with two filling openings 14 and 14a, which are arranged on two opposite side walls 4 and 4a of the trolley 1. The filling openings 14 and 14a are positioned above the solids collection container 20 and, in the embodiment shown, connect directly to the liquid collection chamber 12. The liquid collection chamber 12 is in Fig.9 is designed as a flat drawer which can be pulled out and / or removed from the trolley 1. The filling openings 14 and 14a can either be permanently attached to the liquid collection chamber and removed with it, or the liquid collection chamber 12 can be removed independently of the filling openings 14 and 14a and reconnects to the filling openings 14 and 14a when reinserted, so that a continuous flow of liquid can flow from the filling openings 14 and 14a into the liquid collection chamber 12. This can be achieved, for example, by overlapping the liquid collection chamber 12 and the filling openings 14 and 14a when the liquid collection chamber 12 is inserted.

[0041] It is evident to those skilled in the art that the embodiments described above are to be understood as examples and that the invention is not limited to them, but can be varied in many ways without departing from the scope of the claims. Furthermore, it is evident that the features, regardless of whether they are disclosed in the description, the claims, the figures, or otherwise, also individually define essential components of the invention, even if they are described together with other features. In all figures, the same reference numerals represent the same objects, so that descriptions of objects that may only be mentioned in one figure, or at least not with respect to all figures, can also be applied to those figures with respect to which the object is not explicitly described in the description. Reference symbol list: 1 trolley 2 Trolley top 3 Trolley interior 4.4a Trolley side panel 6 Trolley underside 8 bags 9 Splash guard lip 10 Liquid intake arrangement 11 Backflow preventers 12 Liquid collection chamber 13 Handle 14,14a Filling opening 15 Locking mechanism 16 Fluid guide hollow bodies 17 Seal 18 Recording shutter 19 Maintenance access 20 solid material collection containers 20a second solids receiving tank 22 container lids 23 boxes 24 Actuating mechanism 25 Closure 26 Cover rail 27 Opening 28 wheels QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 102022119747 B4

[0002] WO 2013 / 150259 A

[0003] CN 215155693 U

[0003] DE 10 2016 103 376 A1

[0003]

Claims

Retrofit kit for a liquid collection arrangement (10) for retrofitting in a trolley (1) of a means of passenger transport, designed for the safe collection and / or disposal of liquids accumulating on board, comprising: at least a filling opening (14) opening towards an outside (4) of the trolley (1), a liquid collection chamber (12) designed for arrangement in an interior of the trolley (1); and wherein a backflow prevention device (11) is arranged in the liquid collection chamber (12) which is designed to prevent a liquid poured into the liquid collection arrangement (10) from spilling out. Retrofit kit (10) according to the preceding claim, further comprising at least one fluid guide hollow body (16) for transporting the liquid from the filling opening (14) to the liquid collection chamber (12). Retrofit kit (10) according to one of the preceding claims, wherein the fluid guide hollow body (16) comprises a channel, and / or wherein the fluid guide hollow body (16) comprises a hose. Retrofit kit (10) according to one of the preceding claims, wherein the backflow preventer (11) is a liquid-absorbing material, configured to absorb liquid flowing into the liquid collection chamber (12), and / or wherein the backflow preventer (11) comprises a check valve, and / or wherein the backflow preventer (11) is designed as a flow labyrinth. Retrofit kit (10) according to one of the two preceding claims, wherein the liquid-absorbing material may comprise superabsorbent polymers (SAP), and / or wherein the liquid-absorbing material may comprise mineral absorbers, for example bentonite, montmorillonite, perlite, zeolites and / or diatomaceous earth, and / or wherein the liquid-absorbing material may comprise natural, organic absorbers, for example cellulose, sphagnum moss, starch-based polymers and / or plant fibers, and / or wherein the liquid-absorbing material may comprise hydrophobic absorbers, for example polypropylene nonwoven fabric, wax-impregnated cotton and / or aerogels. Retrofit kit (10) according to one of the preceding claims, wherein the liquid collection chamber (12) is arranged in and / or on the trolley (1) in such a way that it is possible to throw solid materials into the trolley (1) and past the liquid collection chamber (12). Retrofit kit (10) according to one of the preceding claims, further comprising a maintenance access (19), in particular for inserting or removing the backflow prevention device (11) from the liquid collection chamber (12), in particular designed as a maintenance flap. Retrofit kit (10) according to one of the preceding claims, further comprising a removable bag (8) or container for receiving the liquid-absorbing material. Retrofit kit (10) according to one of the preceding claims, wherein the liquid intake arrangement (10) is removable from the trolley (1) and / or wherein the liquid collection chamber (12) is removable from the trolley (1). Retrofit kit (1) according to one of the preceding claims, wherein the filling opening (14) is designed as a funnel, and / or wherein the filling opening (14) comprises a channel, and / or wherein the filling opening (14) comprises a collection basin. Retrofit kit (10) according to one of the preceding claims, wherein the filling opening (14) is designed to pivot out, and / or wherein the filling opening (14) is designed to be pulled out, and / or wherein the filling opening (14) is designed as an insert which can be arranged on or placed on the liquid collection chamber (12). Retrofit kit (10) according to one of the preceding claims, wherein the liquid collection chamber (12) comprises a volume of 10 liters or less, preferably 5 liters or less, more preferably 3 liters or less, or wherein the liquid collection chamber (12) comprises a volume of 0.5 liters or more, preferably 1 liter or more, more preferably 2 liters or more. Retrofit kit (10) according to one of the preceding claims, wherein the liquid collection chamber (12) and / or the filling opening (14) comprises a splash guard lip (9) which prevents the liquid from splashing out during filling and / or flow into the liquid collection chamber (12), and / or wherein the underside of the liquid collection chamber (12) is inclined to prevent the liquids from splashing out during filling. Retrofit kit (10) according to one of the preceding claims, wherein the filling opening (14) comprises a closing mechanism (15), wherein the closing mechanism (15) in particular comprises a movable lid, and / or wherein the closing mechanism (15) in particular comprises a funnel in the open state. Trolley (1) for use in a means of passenger transport, comprising an interior (3), a recyclable material or solid material collection container (20, 20a) arranged in the interior (3), and a liquid collection arrangement (10), in particular according to one of the preceding claims, wherein the liquid collection arrangement (10) is configured for the safe collection and / or disposal of liquids accumulating on board, and the liquid collection arrangement (10) comprising: at least a filling opening (14) opening towards an outside (4) of the trolley, a liquid collection chamber (12) arranged in the interior (3) of the trolley (1);and at least one fluid guide hollow body (16) for transporting the liquid from the filling opening (14) to the liquid collection chamber (12) arranged in the interior (3), wherein a backflow prevention device (11) is arranged in the liquid collection chamber (12) which is designed to prevent a filled liquid from splashing out of the liquid receiving arrangement (10). Trolley (1) according to the preceding claim, wherein the liquid collection chamber (12) is located above the solid receiving container (20, 20a), and / or wherein the filling opening (14) of the liquid receiving arrangement (10) is located above the solid receiving container (20, 20a). Trolley (1) according to the preceding claim, wherein the filling opening (14) and / or the liquid receiving arrangement (10) is arranged to be pivotable and / or pullable out of the trolley (1). Trolley(1) according to the preceding claim, wherein the swiveling out and / or pulling out of the filling opening (14) and / or the liquid receiving arrangement (10) can be carried out by an actuating mechanism (24), wherein the actuating mechanism (24) in particular comprises at least one lever, and / or wherein the actuating mechanism (24) in particular comprises at least one button. Trolley (1) according to one of the preceding claims, further comprising at least one cover rail (26) configured to cover the gap between solid receiving container (20, 20a) and at least one side wall (4) and / or the liquid receiving arrangement (10) and at least one side wall (4). Trolley (1) according to one of the preceding claims, wherein the recycling or solid material collection container (20, 20a) is fluid-tight and / or wherein a removable, fluid-tight collection bag, in particular a waterproof garbage bag, is arranged in the recycling or solid material collection container (20, 20a). Trolley (1) according to one of the preceding claims, further comprising a level indicator (7) for indicating the fill level of the liquid collection chamber (12). Trolley (7) according to one of the preceding claims, wherein the liquid collection chamber (12) comprises a seal (17) on its upper side, which seals the liquid collection chamber (12) against the trolley (1), and / or wherein the liquid collection chamber (12) in a state inserted into the trolley (1) assumes a positive locking connection with the trolley (1) for sealing the liquid collection chamber (12) against the trolley (1). Trolley (1) according to one of the preceding claims, further comprising at least two separate recycling containers (20, 20a) for separating recyclable materials.

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