Sanitary installation for a rail vehicle having a recontamination-free bidet

Abstract

The invention relates to a sanitary installation (10) for a rail vehicle and to a rail vehicle for passenger transport having at least one sanitary installation comprising at least one bidet (40) and a water reservoir (300), connected to the bidet (40), for supplying the bidet (40) with water, wherein, between the water reservoir (300) and the bidet (40), at least one intermediate tank (50) having a water inlet (51), a water outlet (52) and an overflow (53) is arranged such that the water inlet (51) is arranged above the water outlet (52) and the overflow (53) is arranged between the water inlet (51) and the water outlet (52), such that the water inlet (51) is free from contact with the water (60) in the intermediate tank (50), wherein the water inlet (51) of the intermediate tank (50) is connected to the water reservoir (300) and the water outlet (52) of the intermediate tank (50) is connected to the bidet (40).

Description

[0001] Description

[0002] Sanitary facility for a rail vehicle with a recontamination-free bidet

[0003] The invention relates to a sanitary facility for a rail vehicle and a rail vehicle for passenger transport with at least one sanitary facility comprising at least one bidet and a water reservoir connected to the bidet for supplying the bidet with water.

[0004] Bidets and toilets with a bidet function, so-called integrated toilet-bidet units, are well known. Toilets with vacuum pressure or central vacuum technology are commonly used for sanitary facilities in rail vehicles. Vacuum toilets with integrated bidets have also become popular in rail vehicles for public transport.

[0005] The publication WO 2015 / 197348 A1 discloses a generic toilet with an integrated bidet. At least one nozzle of the bidet is connected to a downflow system with a water pressure determined by gravity and is directed upwards or, if appropriate, designed as an adjustable ball nozzle, so that when the bidet is activated, it emits a water jet that extends beyond the upper edge of the toilet.

[0006] The bidet is located within the hygiene-questionable area of ​​a toilet. When activated, the bidet nozzle produces a diagonally upward water jet. During normal use of the toilet, it can become contaminated with buildup. Likewise, liquids can collect in the diagonally upward bidet nozzle; the bidet nozzle can become contaminated, particularly when passengers standing in front of the toilet use the toilet. As a result, recontamination of the water in the downpipe system and thus also of the water in a central drinking water reservoir cannot be ruled out.

[0007] US 2010 / 0235978 A1 teaches a mixing unit of a fresh water system for supplying the bidet of a toilet-bidet unit with tempered fresh water. Fresh water from a fresh water reservoir is heated to reduce the growth of germs and fed to the mixing unit. There, additional unheated fresh water from the fresh water reservoir can be added to ensure tempered delivery through a bidet nozzle.

[0008] The invention is based on the object of further improving hygiene while maintaining the same level of comfort, water and energy consumption.

[0009] The problem is solved by the subject matter of the independent patent claim. Further developments and refinements of the invention are found in the features of the dependent patent claims.

[0010] An intermediate tank according to the invention for a sanitary facility of a rail vehicle for passenger transport comprises a water inlet for supplying the intermediate tank with water from a water reservoir of the sanitary facility, a water outlet for supplying at least one water-consuming device of the sanitary facility with water from the intermediate tank and an overflow for discharging excess water from the intermediate tank and is designed such that, in the intended orientation and position of the intermediate tank, the water inlet is arranged above the water outlet and the overflow is arranged between the water inlet and the water outlet, so that the water inlet is free from contact with the water in the intermediate tank.A sanitary device according to the invention for a rail vehicle for passenger transport comprises at least one bidet and a water reservoir connected to the bidet and at least one intermediate tank according to the invention which is arranged between the water reservoir and the bidet in such a way that the water inlet of the intermediate tank is above the water outlet of the intermediate tank and the overflow of the intermediate tank is arranged between the water inlet and the water outlet of the intermediate tank, so that the water inlet of the intermediate tank is free from contact with the water in the intermediate tank, wherein the water inlet of the intermediate tank is connected to the water reservoir and the water outlet of the intermediate tank is connected to the bidet.

[0011] A rail vehicle for passenger transport according to the invention comprises at least one sanitary facility according to the invention.

[0012] Water-consuming devices in the sanitary facility can be supplied with water via the water outlet of the intermediate tank. The intermediate tank is designed to supply a bidet, in particular the bidet of a toilet-bidet unit in the sanitary facility, with water. The bidet has at least one nozzle for dispensing water, which is connected, for example, via a pipe to the water outlet of the intermediate tank in order to supply this at least one bidet nozzle with water from the intermediate tank. The intermediate tank is thus arranged between the water reservoir and the at least one bidet nozzle. The intermediate tank could equally be used to supply other water-consuming devices in a sanitary facility in a rail vehicle, such as a washbasin, with water from the intermediate tank.

[0013] The water reservoir of the sanitary facility contains, in particular, fresh or drinking water. It is connected, for example, via pipes to the water inlet of the intermediate tank. Fresh or drinking water is thus supplied to the intermediate tank via the water inlet from the water reservoir. The water reservoir can also be referred to as a fresh or drinking water tank.

[0014] In addition to the bidet, the water reservoir can also be assigned to other water-consuming, particularly drinking water-consuming, devices of the sanitary facility, such as a washbasin, and is connected via water-carrying pipes to the bidet and any other water-consuming, particularly drinking water-consuming, devices of the sanitary facility in order to supply them with water, particularly drinking water. The intermediate tank can then be interposed, as already explained.

[0015] According to a further development of the invention, the sanitary facility has at least one washbasin, wherein the water outlet of the intermediate tank is connected to the at least one washbasin, in particular to a water tap associated with the washbasin, of the sanitary facility.

[0016] In a further development, the bidet is integrated into a toilet and forms a toilet-bidet unit with the toilet. At least one bidet nozzle is thus assigned to a toilet bowl, in particular a commode of the toilet, and is arranged in or on the toilet bowl, for example the commode. The toilet with the integrated bidet can, in addition to the at least one bidet nozzle, also comprise at least one flushing nozzle for flushing the toilet. Just as the bidet nozzle ensures the bidet function and the toilet-bidet unit can be operated as a bidet, water being released into the toilet through the at least one flushing nozzle causes the same to be flushed. In particular, the toilet is a vacuum toilet. In a further development, the water inlet of the intermediate tank is arranged in the region of a ceiling of the intermediate tank, in particular on the ceiling side, and / or the water outlet of the intermediate tank is arranged in the region of a floor, in particular on the floor side.A minimum distance between the water inlet of the intermediate tank and the overflow of the intermediate tank is specified to be greater than zero and, in a further development, is at least 20 mm, in particular at least 25 mm. The intermediate tank is designed so that a distance between the water inlet of the intermediate tank and the overflow of the intermediate tank is at least 20 mm, in particular 25 mm or more. A spatial separation of the water reservoir and the water in the intermediate tank, in particular of water standing in the intermediate tank in the area of ​​the water outlet of the intermediate tank, is ensured.

[0017] This prevents water in the intermediate tank from coming into contact with the water inlet, and the intermediate tank thus serves as a barrier to recontamination in the water reservoir. Any germs in the water in the intermediate tank, for example, introduced by germs in a pipe connected to the water outlet, cannot enter the water reservoir.

[0018] The intermediate tank acts as a so-called free outlet in the inlet of the water-consuming devices of the sanitary facility, in particular the bidet. This creates a constant and vertical distance between the lowest point of the inlet opening and the critical water level. The overflow is designed in such a way that, under normal pressure conditions, it is capable of discharging the maximum inflow of water, particularly from the water supply from the water reservoir, in the event of a malfunction.

[0019] According to a further development, a bidet actuating valve is provided between the intermediate tank, in particular the water outlet of the intermediate tank, and the bidet, in particular the at least one bidet nozzle. The bidet actuating valve serves to control the delivery of water from the intermediate tank through the bidet nozzle. The bidet actuating valve is controlled in particular as a function of a signal from a bidet triggering device, for example a button or switch. The bidet triggering device and the bidet actuating valve can for this purpose be connected to a control device which is designed to receive and process the signal from the bidet triggering device and to control the bidet actuating valve as a function of the received signal, i.e. at least to open and close it. The bidet actuating valve is designed, for example, as a solenoid or pinch valve.

[0020] In a further development, the sanitary device has at least one temperature sensor which is suitably designed and arranged in the intermediate tank or in a pipe between the water outlet of the intermediate tank and the bidet, in particular the at least one bidet nozzle, in order to detect the temperature of the water delivered from the intermediate tank via the bidet.

[0021] According to a further development, the sanitary facility has at least one heating device which is suitably designed and assigned to the intermediate tank or a pipe between the water outlet of the intermediate tank and the bidet, in particular the at least one bidet nozzle, in order to heat water in the intermediate tank or in the pipe between the water outlet of the intermediate tank and the bidet, in particular the at least one bidet nozzle. The heating device can be arranged in or on the intermediate tank and can be designed, for example, to heat the water in the intermediate tank with the aid of electrical energy and / or it is arranged in or on the pipe between the water outlet of the intermediate tank and the bidet, in particular the at least one bidet nozzle, and can be designed, for example, as pipe trace heating.

[0022] The heating device can be connected to a control device configured to control the heating device depending on the temperature of the water in the intermediate tank. For this purpose, the control device can be connected to the temperature sensor, either wired or wirelessly, and configured to receive and process the signal from the temperature sensor and to control the heating device depending on the received signal from the temperature sensor.

[0023] A further developed sanitary device comprises at least one fill level sensor, for example a limit switch, which is designed to detect a fill level of water in the intermediate tank and is arranged in or on the intermediate tank, in particular between the overflow and the water outlet, so that it can detect a fill level of water in the intermediate tank which lies between the water outlet and the overflow.

[0024] According to a further development, the sanitary facility comprises at least one inlet valve between the water reservoir and the intermediate tank, as well as a control device, wherein the control device is designed to control the inlet valve depending on the water level in the intermediate tank. The inlet valve is arranged, in particular, in the pipeline between the water reservoir and the intermediate tank for controlling the flow of water from the water reservoir and the intermediate tank. The inlet valve is designed, for example, as a solenoid or pinch valve.

[0025] The control device is suitable for receiving and processing signals from the level sensor and is suitably connected to the level sensor, either wired or wirelessly.

[0026] According to a further development, the overflow of the intermediate tank is connected to an overflow line in order to drain excess water from the intermediate tank and to feed it to a grey water treatment system in the sanitary facility. In this way, the water consumption of the entire sanitary facility can be further reduced. The sanitary facility accordingly comprises at least one grey water treatment system, to which water from the washbasin is supplied, for example, and the grey water treated by the grey water treatment system is used to flush the toilet and is accordingly fed to at least one flush nozzle of the toilet. Grey water treatment systems of this type or sanitary facilities for rail vehicles with grey water treatment systems of this type are known, for example, from EP 2 781 248 B1, EP 3 515 784 B1, EP 3 488 057 B1, EP 3 487 742 B1 or EP 3 487 743 B1.These greywater treatment systems have a connection for the greywater supply, for example, from the sink, as well as a freshwater inlet. The overflow of the intermediate tank can be connected to both the greywater inlet and the freshwater inlet of the greywater treatment system.

[0027] In one variant, the overflow of the intermediate tank is connected to a frost drainage line which leads out of the sanitary facility of the rail vehicle and opens onto a track bed in order to drain excess water from the intermediate tank and, in particular via the frost drainage line, out of the vehicle.

[0028] According to a further alternative, the overflow of the intermediate tank may be connected to an overflow pipe connected to a flush water tank for the toilet, so that excess water is drained from the intermediate tank and fed to the flush water tank of the toilet of the sanitary appliance.

[0029] The invention ensures the drinking water quality of the water in the reservoir with regard to recontamination. Additional local temperature control of the bidet water used can also be taken into account.

[0030] To ensure the recontamination of drinking water, an intermediate tank with a free outlet is integrated into the bidet inlet in a conventional sanitary facility with a toilet-bidet unit. The intermediate tank functions as a recontamination barrier. The intermediate tank has a free outlet. It can also be equipped with a fill level sensor which, in conjunction with an inlet valve mounted above the intermediate tank, ensures a spatial separation of the fresh water reservoir and water outlet. To guarantee a comfortable temperature for bidet use, the water outlet and the intermediate tank are equipped with a heater. An integrated temperature sensor monitors the actual temperature of the pipe and prevents overheating.

[0031] The anti-microbial barrier prevents contamination of the drinking water supply in rail vehicles. The heater with its integrated sensor monitors the comfortable temperature of the bidet water. The free outlet ensures functionality in the event of an accident on rail vehicles.

[0032] The invention permits numerous embodiments. It is explained in more detail with reference to the following figures, each of which shows an exemplary embodiment. Like elements in the figures are provided with like reference numerals. Fig. 1 shows schematically a sanitary device according to the invention in a first embodiment. Fig. 2 shows schematically a further embodiment of the sanitary device according to the invention.

[0033] Fig. 3 shows the intermediate tank from Fig. 1 schematically in three-dimensional detail view,

[0034] Fig. 4 shows the integrated toilet-bidet unit from Fig. 1 schematically in three-dimensional detail.

[0035] Fig. 1 schematically shows a first embodiment of a sanitary facility 20 according to the invention for a rail vehicle 10 for passenger transport. The sanitary facility 20 here comprises an integrated toilet-bidet unit 40 with bidet function and a water reservoir 300 connected to the toilet-bidet unit 40 for supplying the bidet of the toilet-bidet unit 40 with water. The toilet-bidet unit 40 has a commode 43 with integrated flushing nozzles 41 for flushing the commode 43 when the toilet-bidet unit 40 is used as a toilet, and also has at least one integrated bidet nozzle 42 for dispensing water in the bidet function. With the bidet nozzle 42, the toilet-bidet unit 40 can be operated as a bidet and the bidet function is ensured. Here, both the flushing nozzles 41 and at least one bidet nozzle 42 are connected to the water reservoir 300.The flushing nozzles 41 are connected to a preferably unheated main water line 200 via a flushing water line 100. The main water line 200 connects the flushing water line 100 to the water reservoir 300. The at least one bidet nozzle 42 is connected to the water reservoir 300 via the main water line 200 and the adjoining water-carrying pipe 400 and the water-carrying pipe 401 connected to an intermediate tank 50.Thus, between the water reservoir 300 and the at least one bidet nozzle 42, the intermediate tank 50 is arranged with a water inlet 51, a water outlet 52 and an overflow 53 such that the water inlet 51 is arranged above the water outlet 52 and the overflow 53 is arranged between the water inlet 51 and the water outlet 52 so that the water inlet 52 is free from contact with the water 60 in the intermediate tank 50, wherein the water inlet 51 of the intermediate tank 50 is connected to the water reservoir 300 via the pipe 400 and wherein the water outlet 52 of the intermediate tank 50 is connected to the at least one bidet nozzle 42 via the pipe 401.The water inlet 51 thus serves to supply the intermediate tank 50 with water from the water reservoir 300, the water outlet 52 accordingly serves to supply the toilet-bidet unit 40 with water 60 from the intermediate tank 50 and the overflow 53 of the intermediate tank 50 causes excess water to be discharged from the intermediate tank 50.

[0036] The water reservoir 300 is a fresh water container and supplies, in particular, water of drinking water quality to the intermediate tank (50) or other water-consuming devices of the sanitary facility, such as here to the toilet-bidet unit 40 with its flushing nozzles 41 and, for example, to a washbasin unit with a washbasin 600 and a water tap 610 ending above.

[0037] The toilet-bidet unit 40 is operated by falling water, i.e., water from the water reservoir 300 is fed to the intermediate tank and the flushing nozzles 41 by gravity by means of a falling water system 30, comprising the water reservoir 300, the pipes 100, 400, and 401, as well as the intermediate tank 50, an inlet valve 430, a bidet actuation valve 420, and a flushing water actuation valve 110. Alternatively, one or more pumps can be provided between the water reservoir 300 and the flushing nozzles 41 and / or the intermediate tank 50. The bidet nozzle 42 is also supplied by falling water from the intermediate tank 50. Similarly, a pump could also be provided between the intermediate tank 50 and the at least one bidet nozzle 41. An arc 500 described by the water jet emitted by the bidet nozzle 42 can also be specified to be essentially constant if the fill level of water 60 in the intermediate tank 50 is kept essentially constant.Particularly for a downflow bidet, the water level 60 in the intermediate tank 50 can be controlled by means of a level sensor 54 in the intermediate tank 50 and a control device (not shown in detail), as well as the inlet valve 430 in the pipe 400 between the water reservoir 300 and the intermediate tank 50, which inlet valve is controlled by the control device as a function of a signal representing the water level 60 in the intermediate tank 50 from the level sensor 54. Analogously, the water pressure of the water delivered by the bidet nozzle 42 and thus the course of the arc 500 of the water jet delivered by the bidet nozzle 42 could also be kept constant with a pump between the intermediate tank 50 and the at least one bidet nozzle 41. This could also be achieved by adjusting the degree of opening of the bidet actuating valve 420 and the associated limitation of the water flow rate, controlled by the control device.

[0038] The flush water actuating valve 110 is provided in the flush water line 100 and can be used to control the toilet flushing of the toilet-bidet unit 40. If the flush water actuating valve 110 is triggered, a predetermined amount of water is fed through the flush water line 100 and the flush nozzles 41 into the commode 43, and the toilet is flushed. The bidet nozzle 42 is connected via the water line 401 to the intermediate tank 50, which in turn is connected via the unheated pipe 400 to the unheated main water line 200. The water line 401 is preferably provided with a pipe heating system 410, which can heat the water flowing through the water line 401 or the water standing therein. The water pipe 401 can accordingly be referred to as a hot water pipe, since it delivers preheated or warmed water downstream through the pipe heating system 410.

[0039] The bidet actuation valve 420, which may be a solenoid valve, for example, is arranged in the water line 401. The bidet actuation valve 420 preferably allows a fixed, predetermined amount of water to flow downstream towards the bidet nozzle 42 per actuation in order to enable the bidet function of the toilet-bidet unit 40 when actuated. The amount of water that is allowed through per actuation of the bidet actuation valve 420 is preferably selected such that it is sufficiently large for normal bidet use. The amount of water released per actuation is preferably in a range between 0.2 l and 0.5 l in a time span of between 10 and 30 seconds.In order to ensure that sufficient warm water is available when using the bidet, even if the bidet actuation valve 420 is actuated multiple times, it is considered advantageous if the heating output of the pipe heating 410 and the diameter and length of the water pipe 401 are dimensioned such that the heated water quantity or water column available in the water pipe 401 is sufficiently large for at least two bidet actuation processes.

[0040] Fig. 1 illustrates the rail vehicle 10 or the sanitary facility 20 during operation of the bidet function of the toilet-bidet unit 40. As soon as the bidet actuating valve 420 is activated and a flow of water through the bidet actuating valve 420 is permitted, the water located upstream above the bidet actuating valve 420 and preheated by the pipe trace heating 410 will flow towards the bidet nozzle 42 due to gravity and in the form of an arc-shaped water jet, which is identified by the reference symbol 500, at least in sections locally pass the upper edge 43a of the commode 43 before it lands in the commode 43. In order to set the curved path of the water jet 500 shown or, if necessary, In order to be able to readjust, it is considered advantageous if the bidet nozzle 42 is a pivoting or adjustable ball nozzle.A significant advantage of the downdraft-operated sanitary fixture 20 is that the water jet 500, which is emitted upwards by the bidet nozzle 42 beyond the upper edge 43a of the commode 43, will reliably remain within the commode 43 and re-enter the commode 43 within the inner edge of the commode 43. This is ensured by the downdraft operation or the gravity-induced outflow of the water from the intermediate tank 50, because the height of the water column in the intermediate tank 50 and between the intermediate tank 50 and the bidet nozzle 42, as well as the pipe cross-section, determine the water flow and the pressure conditions and thus determine the height and width of the water jet 500 after leaving the bidet nozzle 42.

[0041] The inlet valve 430 controls the flow of water from the water reservoir 300 to the intermediate tank 50. This can be done by the control device, depending on the water level 60 in the intermediate tank 50, which can be detected by the level sensor 54. Strictly speaking, this would be a closed-loop control rather than a control system, although the two are used synonymously here.

[0042] Fig. 2 shows a further exemplary embodiment of a rail vehicle 10 which is equipped with a fall water-operated sanitary facility 20. The embodiment in Fig. 2 differs from the sanitary facility in Fig. 1 in that the heating device 411 is assigned directly to the intermediate tank 50 and is not designed as a pipe trace heater, assigned to the pipeline 401. The heating device 411 can be designed helically in the manner of an immersion heater and can be arranged in the intermediate tank 50 or can enclose it. Furthermore, in contrast to the sanitary facility 20 according to Fig. 1, the sanitary facility 20 according to Fig. 2 is equipped with an additional wash basin 600 which is provided with a faucet 610.The water tap 610 is connected via a hand-washing valve 620 to the water pipe 400, which is here equipped with a pipe heating system 410 that leads from the connection point of the water pipe 400 with the main water pipe 200 to the hand-washing valve 620.

[0043] The connection of the faucet 610 or the hand wash valve 620 to the water pipe 400 ensures that the wash basin 600 is operated with water at a pleasant temperature. In order to prevent the water temperature within the water pipe 400 from rising too much, it is considered advantageous if the pipe heating system 410 is equipped with a thermostat and / or a temperature monitoring device which ensures that the water column in the water pipe 400 does not exceed a predetermined limit temperature of, for example, 20°C. The pipe heating system 410 can, controlled by the control device, only be activated when the hand wash valve 620 is actuated, so that water which is directed to the intermediate tank 50 can pass through the pipe 400 unheated.

[0044] Fig. 3 shows the intermediate tank 50 with the water inlet 51, the water outlet 52 and the overflow 53. The water inlet 51 is connected to the fresh water pipe 400 according to Fig. 1 or 2 to supply the intermediate tank 50 with fresh water from the water reservoir 300. It could therefore also be referred to as a fresh water inlet. The water outlet 52 is coupled to the pipe 401 according to Fig. 1 or 2 to supply the bidet with water 60 from the intermediate tank 50. The overflow 53 serves to drain off excess water from the intermediate tank 50. This can be connected to a frost drainage line to drain the excess water from the intermediate tank 50 out of the rail vehicle 10. Additionally or alternatively, it can be connected to a grey water treatment plant in order to supply it with the excess water from the intermediate tank 50, which contributes to saving water.

[0045] The water inlet 51 is arranged above the water outlet 52 in the intended orientation and position of the intermediate tank 50, and the overflow 53 is arranged between the water inlet 51 and the water outlet 53 in the intended orientation and position of the intermediate tank 50. Here, the water inlet 51 is arranged on the ceiling side and the water outlet 52 is arranged on the floor side.

[0046] A distance 81 between the water inlet 51 and the overflow 53 is at least 20 mm, in particular at least 25 mm.

[0047] This ensures that the water inlet 51 is always free from contact with the water 60 in the intermediate tank 50, and the intermediate tank can act as a barrier against recontamination. A spatial separation of the fresh water reservoir 300 and the water outlet 52 is provided.

[0048] As already explained above, the fill level of the water 60 in the intermediate tank 50 and thus a distance 82 of the surface of the water 60 in the intermediate tank 50 to the overflow 53 can be regulated in order to keep the arc 500 of the water delivered by the bidet nozzle 42 according to Fig. 1 or 2 constant over time. To monitor the fill level, a fill level sensor 54 is provided in the intermediate tank 50 and is coupled to the control device, which in turn is designed to process and evaluate the signals from the fill level sensor 54 in order to control the supply of water to the intermediate tank 50 via the inlet valve 430 according to Fig. 1 and thus the fill level of water 60 in the intermediate tank 50.

[0049] Not shown in the figure is a temperature sensor arranged in the intermediate tank 50 to detect the temperature of the water 60 in the intermediate tank 50. This is also connected to the control device, which in turn regulates or controls the heating power of the heating device 411 depending on the detected temperature of the water 60 in the intermediate tank 50.

[0050] Fig. 4 shows an exemplary embodiment of a toilet-bidet unit 40 which can be used in the sanitary facility 20 according to Figs. 1 and 2. Figure 4 shows the toilet-bidet unit 40 in a three-dimensional view viewed obliquely from the side. Three flushing nozzles 41 can be seen which are preferably mounted in a rotationally symmetrical manner inside the commode 43 or are integrated into the inner surface 43b of the commode 43. Also integrated into the commode 43, specifically also into the inner surface 43b of the commode 43, is a bidet nozzle 42 with which an arc-shaped water jet, such as the water jet 500 according to Fig. 1 or 2, can be generated solely by gravity through the falling water system 30 according to Fig. 1 or 2.

[0051] In the embodiment according to Fig. 4, the bidet nozzle 42 is a spherical nozzle which can be adjusted during installation and / or maintenance such that the arc-shaped water jet 500 according to Fig. 1 or 2 remains within the bowl area or within the inner contour of the bowl area of ​​the commode 43. In this embodiment, the bidet nozzle 42 is separate from the flushing nozzle 41 located underneath it; with a view to minimal assembly effort, it can alternatively be provided that the bidet nozzle 42 forms a combination nozzle with an associated flushing nozzle 41, which can be installed and adjusted in a single assembly step and allows connection to both the flushing water line 100 and the water line 401 according to Fig. 1 or 2.

[0052] The flushing water line 100 can also be connected to a grey water treatment system of the sanitary facility instead of to the water reservoir 300, so that the flushing of the commode 43 can be carried out with treated grey water.

[0053] Liquids or contaminants can accumulate in the diagonally upward-facing bidet nozzle 42, especially when passengers standing in front of it use the toilet. This can also introduce germs or other pathogens. However, recontamination up to the water reservoir 300 can be prevented by the intermediate tank 50 described above.

[0054] Although the invention has been illustrated and described in detail by means of preferred embodiments, the invention is not limited by the disclosed examples and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims

Patent claims 1. Sanitary device (20) for a rail vehicle (10) for passenger transport, comprising at least one bidet (40) and a water reservoir (300) connected to the bidet (40) for supplying the bidet (40) with water, characterized in that at least one intermediate tank (50) with a water inlet (51), a water outlet (52) and an overflow (53) is arranged between the water reservoir (300) and the bidet () in such a way that the water inlet (51) is arranged above the water outlet (52) and the overflow (53) is arranged between the water inlet (51) and the water outlet (52), so that the water inlet (51) is free from contact with the water (60) in the intermediate tank (50), wherein the water inlet (51) of the intermediate tank (50) is connected to the water reservoir (300) and the water outlet (52) of the Intermediate tank (50) is connected to the bidet (40).

2. Sanitary device according to claim 1, characterized in that it comprises at least one temperature sensor (70) which is arranged in the intermediate tank (50) or in the pipe (401) between the water outlet (52) of the intermediate tank (50) and the bidet (40) for detecting a temperature of water (60).

3. Sanitary device according to one of claims 1 or 2, characterized in that it comprises a fill level sensor (54) which is arranged in or on the intermediate tank (50) for detecting a fill level of water (60) in the intermediate tank (50).

4. Sanitary device according to claim 3, characterized in that it comprises at least one inlet valve (430) between the water reservoir (300) and the intermediate tank (50) and a control device which is designed to control the inlet valve (430) as a function of the fill level of water (60) in the intermediate tank (50).

5. Sanitary device according to one of claims 1 to 4, characterized in that it comprises at least one heating device (410, 411) which is designed and associated with the intermediate tank (50) or a pipe (401) between the intermediate tank (50) and the bidet (40) in order to heat water (60) in the intermediate tank (50) or in the pipe (401) between the intermediate tank (50) and the bidet (40).

6. Sanitary device according to one of claims 1 to 5, characterized in that the water inlet (51) of the intermediate tank (50) is arranged in the region of a ceiling of the intermediate tank (50) and the water outlet (52) of the intermediate tank (50) is arranged in the region of a bottom of the intermediate tank (50).

7. Sanitary device according to one of claims 1 to 6, characterized in that a distance (81) between the water inlet (51) of the intermediate tank (50) and the overflow (53) of the intermediate tank (50) is at least 20 mm.

8. Sanitary device according to one of claims 1 to 7, characterized in that the overflow (53) of the intermediate tank (50) is connected to an overflow line in order to drain excess water from the intermediate tank (50) and to supply it to a grey water treatment plant of the sanitary device (20).

9. Sanitary device according to one of claims 1 to 8, characterized in that it comprises at least one Wash basin, wherein the water outlet (52) of the intermediate tank (50) is connected to the at least one wash basin of the sanitary facility (20).

10. Sanitary device according to one of claims 1 to 9, characterized in that the bidet (40) is integrated into a toilet.

11. Sanitary device according to claim 10, characterized in that the toilet with the integrated bidet (40) comprises at least one flushing nozzle (41) for flushing the toilet and at least one bidet nozzle (42) for discharging water from the intermediate tank (50).

12. Vehicle for passenger transport, in particular a rail vehicle for passenger transport, characterized in that it comprises at least one sanitary facility (20) according to one of claims 1 to 11.

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