Abstract
A train station has at least one transportation route for traffic of vehicles, wherein the at least one transportation route is provided with a vehicle tunnel. At least one public waiting area is arranged adjacent to the at least one transportation route. An enclosure is provided in which the at least one public waiting area is arranged, wherein the enclosure has at least one side wall. At least one ambient air purification arrangement for purifying ambient air is provided that has one or more filter units for separating solid, liquid or gaseous ambient air pollutants from the ambient air. The one or more filter units are arranged at and/or in the at least one side wall of the enclosure.
Claims
1. A train station comprising: at least one transportation route for traffic of vehicles, wherein the at least one transportation route comprises a vehicle tunnel; at least one public waiting area arranged adjacent to the at least one transportation route; an enclosure that partially encloses the at least one public waiting area and the at least one transportation route, wherein the enclosure comprises at least one side wall; at least one ambient air purification arrangement configured to purify ambient air and comprising one or more filter units configured to separate solid, liquid or gaseous ambient air pollutants from the ambient air; wherein the one or more filter units are arranged at and/or in the at least one side wall of the enclosure, wherein the at least one side wall of the enclosure comprises a curvature viewed in a plane positioned normal to a length extension of the at least one transportation route, and wherein the one or more filter units comprise a curvature corresponding to the curvature of the at least one side wall of the enclosure.
2. The train station according to claim 1, wherein each of the one or more filter units arranged at and/or in the at least one side wall comprises at least one air inlet opening facing the at least one public waiting area and further comprises at least one air outlet opening facing the at least one public waiting area, wherein the one or more filter units are configured to be supplied with the ambient air through the at least one air inlet opening and configured to discharge purified air through the at least one air outlet opening.
3. The train station according to claim 1, wherein the enclosure comprises a ceiling region, wherein the one or more filter units include a filter unit arranged in the ceiling region.
4. The train station according to claim 3, wherein the filter unit arranged in the ceiling region is arranged between a ceiling of the enclosure and an overhead contact line of the transportation route.
5. The train station according to claim 1, further comprising a partition device, wherein the at least one public waiting area is separated by the partition device from the at least one transportation route, and wherein the one or more filter units are arranged at and/or in the partition device.
6. The train station according to claim 5, wherein the partition device is an access control device, wherein the access control device comprises at least one access control door configured to open the at least one public waiting area in a person exchange state toward the at least one transportation route.
7. The train station according to claim 1, wherein the at least one public waiting area comprises at least one station platform extending parallel to the at least one transportation route, wherein the at least one station platform comprises at least one overhang region extending at least partially across a free space, wherein the one or more filter units include a filter unit arranged in a region.
8. The train station according to claim 7, wherein the free space is closed off by a protection device with respect to the at least one transportation route.
9. The train station according to claim 8, wherein the protection device is a protective grid.
10. The train station according to claim 1, further comprising a column-shaped structural element arranged in the at least one public waiting area, wherein the one or more filter units include a filter unit arranged in the column-shaped structural element.
11. The train station according to claim 10, wherein the column-shaped structural element is embodied as a seat for a person waiting in the at least one public waiting area.
12. The train station according to claim 1, further comprising a stairway, wherein the one or more filter units include a filter unit arranged at the stairway.
13. The train station according to claim 12, wherein the stairway is a self-supporting stairway and the filter unit arranged at the stairway is arranged underneath the self-supporting stairway.
14. The train station according to claim 1, further comprising an escalator, wherein the one or more filter units include a filter unit arranged at the escalator.
15. The train station according to claim 14, wherein the filter unit arranged at the escalator is arranged in a region between said escalator and a neighboring escalator.
16. The train station according to claim 1, wherein the at least one transportation route comprises one or more track-guiding elements, wherein the one or more filter units include a filter unit arranged on the at least one transportation route.
17. The train station according to claim 16, wherein the one or more track-guiding elements include two neighboring track-guiding elements, wherein the filter unit arranged on the at least one transportation route is arranged between the two neighboring track-guiding elements.
18. The train station according to claim 16, wherein the one or more track-guiding elements include two pairs of track-guiding elements, wherein the filter unit arranged on the at least one transportation route is arranged in an intermediate space between the two pairs of track-guiding elements.
19. The train station according to claim 1, wherein the at least one public waiting area comprises a hollow space, wherein the one or more filter units include a filter unit arranged in the hollow space.
20. The train station according to claim 19, wherein the hollow space is a cable guiding channel and/or a venting channel.
21. The train station according to claim 1, wherein the ambient air purification arrangement comprises at least one sensor device configured to detect a vehicle moving into or out of the train station and/or configured to detect a degree of ambient air contamination, wherein the at least one sensor device is configured to activate or deactivate the one or more filter units based on detecting a vehicle moving into or out of the train station and/or based on detecting a limit value of the degree of ambient air contamination.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) Further advantages result from the following drawing description. In the drawing, an embodiment of the invention is illustrated. The drawing, description, and claims contain numerous features in combination. A person of skill in the art will consider the features expediently also individually and combine them to expedient further combinations.
(2) FIG. 1 shows a schematic section view of tunnel train station according to a first embodiment.
(3) FIG. 2 shows a schematic section view of the tunnel train station according to a second embodiment.
(4) FIG. 3 shows a schematic view from above of a detail of the tunnel train station according to a third embodiment.
(5) FIG. 4 shows a schematic section view of the tunnel train station according to a fourth embodiment.
(6) FIG. 5 shows a schematic section view of the tunnel train station according to the invention according to a fifth embodiment.
(7) FIG. 6 shows a schematic section view of the tunnel train station according to the invention according to a sixth embodiment.
(8) FIG. 7 shows a schematic section view of the tunnel train station according to a seventh embodiment.
(9) FIG. 8 shows a schematic section view of the tunnel train station according to an eighth embodiment.
(10) FIG. 9 shows a schematic section view of the tunnel train station according to a ninth embodiment.
(11) FIG. 10 shows a schematic view from above of a detail of the tunnel train station according to a tenth embodiment.
(12) FIG. 11 shows a schematic view of a detail of the tunnel train station according to an eleventh embodiment.
(13) FIG. 12 shows a schematic section view of the tunnel train station according to a twelfth embodiment.
(14) FIG. 13 shows a schematic view from above of a detail of the tunnel train station according to a thirteenth embodiment.
(15) FIG. 14 show a schematic view from above of a detail of the tunnel train station according to fourteenth embodiment.
(16) FIG. 15 shows a schematic view from above of a detail of the tunnel train station according to fifteenth embodiment.
(17) FIG. 16 shows a schematic view from above of a detail of the tunnel train station according to sixteenth embodiment.
(18) FIG. 17 shows a schematic section view of the tunnel train station according to a seventeenth embodiment.
(19) FIG. 18 shows a schematic section view of the tunnel train station according to an eighteenth embodiment.
(20) FIG. 19 shows a schematic section view of a train station.
(21) FIG. 20 shows a schematic section view of the tunnel train station according to the invention according to a nineteenth embodiment.
DESCRIPTION OF PREFERRED EMBODIMENTS
(22) The Figures shows only examples and are not to be understood as limiting. In the Figures, same or same-type components are identified with same reference characters.
(23) They show a train station 1 according to the invention with a public waiting area 3. In this public waiting area 3 persons 4 can wait. The public waiting area 3 is arranged spatially adjacent to the transportation route 5. Vehicle 6 can travel on this transportation route 5. The vehicles 6 move in and out of the train station 1.
(24) The illustrated train station 1 can be a train station 1 for rail vehicles (rapid transit trains, subways or tramways) or motor vehicles (buses, long-distance buses etc.). The train station can be an above-ground train station or an underground train station (so-called tunnel train station). The public waiting area 3 can be embodied, for example, from concrete. In this context, as shown, it can enclose a free space 8 together with the transportation route 5. In this free space 8, for example, an electrical cable 9 can be guided that can serve for electrification of the transportation route 5. The free space 8 in the illustrated embodiment is designed as a U-shaped profile and is in particular delimited in upward direction by an overhang of the station platform of the public waiting area 3.
(25) The vehicles 6 which are traveling in the train station 1 constitute a source of ambient air pollutants. This is the case, on the one hand, due to the emissions of the drive means (e.g. an internal combustion engine) but also by wear debris of braking during a braking action of the vehicle 6. In particular, loading of the ambient air with so-called particulate matter can be found to be a health hazard to the persons 4 which are present in the public waiting area 3. It is necessary to reduce the load with ambient air pollutants of the ambient air in the train station 1 or to remove them again from the ambient air.
(26) For this purpose, an ambient air purification arrangement is provided in the train station 1. The ambient air purification arrangement comprises at least one filter unit 10.
(27) The tunnel train station 1 illustrated in FIG. 1 is closed by an enclosure 2 relative to its environment. For this reason, for safety and health considerations, a sufficient circulation of ambient air contained within the enclosure 2 must be carried out. In this context, it must be considered in particular that the vehicles 6 which are traveling in the tunnel train station 1 constitute a source of ambient air pollutants.
(28) This is the case, on the one hand, due to the emissions of the drive means (e.g. an internal combustion engine) but also by wear debris of braking during a braking action of the vehicle 6. In particular, loading of the ambient air with so-called particulate matter can be found to be a health hazard to the persons 4 which are present in the public waiting area 3. It is necessary to reduce the load with ambient air pollutants of the ambient air in the tunnel train station 1 or to remove them again from the ambient air.
(29) For this purpose, an ambient air purification arrangement is arranged in the tunnel train station 1. The ambient air purification arrangement comprises at least one filter unit 10 for separating solid, liquid or gaseous ambient air pollutants, in particular particulate matter, from the ambient air. In the illustrated embodiment of FIG. 1, the filter unit 10 is arranged in the free space 8. This arrangement is particularly advantageous because the free space 8 is already present in most tunnel train stations 1 in the form of the illustrated U-shaped molded concrete part, i.e., as an overhang of the station platform. Moreover, the free space 8 which is typically extending across the entire length of the public waiting area 3 provides for a substantially unhindered outflow region for the filter unit 10. The latter can be operated e.g. as a passive system. The vehicle 6 which are moving from the vehicle tunnel 7 into the enclosure 2 produce thereby by means of the so-called piston effect a satisfactory suction in the ambient air. The filter unit 10 will thus be designed to be flowed through in a length direction of the public waiting area 3. Other flow directions are however also conceivable. Also, the filter unit 10 can be operated (additionally) as an active system in order to further increase the separation performance. The filter unit 10 is located thus also at the source of the ambient air pollutants, i.e., in neighborhood to the vehicles 6. The efficiency of the purification of the ambient air is optimized.
(30) A further advantage of the arrangement of the filter unit 10 in the free space 8 is that it is protected there from an unauthorized access by persons 4 (and thus also from vandalism). Already existing installation space is utilized in the tunnel train station 1. The clearance profile provided for the transportation route 5 is not infringed.
(31) FIG. 2 shows a further embodiment of the tunnel train station 1. It corresponds substantially to the embodiment of FIG. 1. However, a protection device 11 is provided here additionally. It separates the free space 8 from the transportation route 5. Thus, the filter unit 10 is encased in the free space 8. The protection device 11 can be, for example, embodied as a protective grid. This protective grid serves to protect the filter unit 10 from environmental effects: on the one hand, it protects against vandalism by persons 4; on the other hand, it can however protect against damage of the filter unit 10 by animals that are present in the transportation route 5 (e.g. rodents). Also, damage by waste or the like swirled up by the vehicle 6 entering or leaving is avoided. The mesh width of the protective grid is designed such that it causes only a negligibly small pressure loss in the environment of the filter unit 10. The filter unit 10 can be operated still as a passive system (additionally as an active system, as needed).
(32) FIG. 3 shows a schematic view from above of a tunnel train station 1. Here, in particular a transition region 12 between the vehicle tunnel 7 and the public waiting area 3 can be seen. In this transition region 12, a light signal device 13 for entering and leaving vehicles 6 is arranged above the vehicle tunnel 7. Also, in the transition region 12 a column-shaped structural element 14 is provided. This column-shaped structural element 14 comprises the filter unit 10. The arrangement of the column-shaped component 14 in the transition region is advantageous again because, on the one hand, the filter unit 10 is located thus near the source of ambient air pollutants. On the other hand, it can be operated as a passive system because a sufficient suction by the piston effect of an entering and leaving vehicle 6 is provided at this location.
(33) Moreover, the embodiment of the ambient air purification arrangement has in addition the advantage that it prevents persons 4 from accessing the vehicle tunnel 7. They cannot without problem enter the vehicle tunnel 7. In the column-shaped structural element 14, the filter unit 10 can also be adequately protected by a housing against vandalism and other unauthorized access.
(34) FIG. 4 shows a section illustration of an embodiment of the tunnel train station 1. In this embodiment, the filter unit 10 is arranged in a ceiling region 15 of the enclosure 2. The filter unit 10 is here attached to a ceiling 16 of the enclosure 2. It is arranged above the transportation route 5. Here, the ambient air contamination is typically strongest due to the vehicles 6 which are traveling in this region. Here also, the filter unit 10 can be operated as a passive and/or active system. In case that the transportation route 5 has overhead contact lines (not illustrated), the filter unit 10 in the illustrated arrangement is also arranged such that it leaves open the clearance profile of the transportation route 5, i.e., does not infringe it. In this arrangement suspended from the ceiling area 15 or the ceiling 16 of the enclosure 2, the filter unit 10 is also protected from vandalism by persons 4. They cannot reach the filter unit 10 without additional auxiliary means.
(35) In FIG. 5, a further embodiment of the present tunnel train station 1 is illustrated. Here, the filter unit 10 is embodied as a freestanding structural element in the public waiting area 3 at a side wall 17. Advantage of this arrangement is that the public waiting area 3 substantially remains free for persons 4 or other objects. Here, the filter unit 10 can also be enclosed in a housing in order to protect it from unauthorized access and vandalism. At the same time, it is easily accessible for a technician, e.g. for servicing purposes. In this position, the filter unit 10 is preferably embodied as an active system that comprises corresponding ambient air inlets (not illustrated) and ambient air outlets (not illustrated) in order to transport the ambient air through the filter unit 10 for purposes of purification. The filter unit 10 is embodied across a height of the side wall 17.
(36) FIG. 6 shows an embodiment similar to that of FIG. 5. Here, the filter unit 10 is however not arranged freestanding within the public waiting area 3 but is at least partially recessed into the side wall 17. In this way, on the one hand, it is possible to utilize, as needed, installation space that is available in the side wall 17 but otherwise unused. On the other hand, the filter unit 10 is still further retracted with regard to the public waiting area 3. Also, an access to the filter unit 10 through a servicing corridor (not illustrated) or the like in the side wall 17 for servicing purposes is conceivable here. The filter unit 10 is operated preferably as an active system.
(37) In FIG. 7, a tunnel train station 1 with a multimedia device 18 is shown. This multimedia device 18 is illustrated here suspended from the ceiling area 15 of the enclosure 2. The multimedia device 18 in the illustrated example can be a display panel that displays information regarding the train operation in the tunnel train station 1 or other information (e.g. safety information). It can be seen that the filter unit 10 is again positioned outside of the reach of persons 4. Vandalism can be prevented. Also, the filter unit 10 can be retrofitted easily on a multimedia device 18 that is present in the tunnel train station 1. The filter unit 10 will be preferably at least additionally an active system.
(38) FIG. 8 again employs the attachment of the filter unit 10 according to the embodiment of FIGS. 5 and 6. In this embodiment, the filter unit 10 however is embodied in a compact configuration. In the illustrated embodiment, it comprises substantially the size of a waste disposal container. It is mounted approximately at half the height of the side wall 17 of the enclosure 2 partially in the side wall 17. This height enables a technician with a comfortable access e.g. for servicing purposes. Again, the filter unit 10, as in all embodiments in which it is arranged in the public waiting area 3, will comprise a housing for its protection with corresponding ambient air inlets and ambient air outlets. The filter unit 10 will be preferably (at least additionally) an active system.
(39) A similar embodiment is also illustrated in FIG. 9. Here, the filter element unit 10 is however arranged on a floor of the public waiting area 3 in the side wall 17. As a whole, the compact filter units 10 of the FIGS. 8 and 9 efficiently utilize the installation space, which is in any case sparsely provided in a tunnel train station 1, without interrupting the operation of the tunnel train station 1 thereby.
(40) In FIG. 10, a tunnel train station 1 with a stairway 19 is illustrated. The stairway 19 is configured as a self-supporting stairway. The stairway 19 can serve to enable persons 4 to exit the public waiting area 3. This can serve purposes of leaving the tunnel train station 1 or of changing to a different public waiting area 3. Here, below the stairway 19, a free space is present which is provided due to its construction as a self-supporting stairway. In this space, the filter unit 10 can be arranged; it utilizes already existing installation space expediently. The filter unit 10 is preferably (at least additionally) an active system, i.e., a system which comprises, in addition to at least one filter element, at least one blower for producing an air flow through the filter element.
(41) FIG. 11 shows a train station 1 or tunnel train station 1 with a partition device 20 that is designed as an access control device and comprises a plurality of partition elements 21 and partition doors 22 or access control doors 22 arranged therebetween. Such an embodiment is suitable likewise for above-ground train stations as well as underground tunnel train stations. The partition elements 21 are connected rigidly and stationarily with the public waiting area 3 while the partition doors 22 or access control doors 22 can be selectively openable and closable. In the partition elements 21, the technology (mechanism, drive motors, control technology) required for movement of the access control doors 22 is arranged.
(42) The partition device 20 serves to keep persons 4 away from the transportation route 5. Thus, they cannot be hit by an incoming vehicle 6 or access unauthorized the transportation route 5. At the point in time when the vehicle 6 enters the enclosure 2, the partition doors 22 are closed. The vehicle 6 then begins a braking process until it comes to a stop at a predetermined holding position along the public waiting area 3. Now a vehicle door 23 opens which is arranged in alignment with the partition door 22. The partition door 22 also opens. Persons 4 can board or deboard the vehicle 6, i.e., an exchange of persons takes place.
(43) In general, in particular the partition elements 21 comprise unused space which is not occupied by the technology that is required for moving the access control doors 22. In it, e.g. the filter unit 10 can be arranged. It can be received therein in a flat arrangement or can be attached to a surface of the partition element 21 or can be integrated into a volume which is made available by the respective partition element 21. Also, it is possible to provide the filter unit 10 in the partition door 22. The filter unit 10 is preferably (at least additionally) an active system, i.e., a filter unit which comprises at least a blower for producing an air flow. It is advantageously arranged in the vicinity of the source of the ambient air pollutants.
(44) In FIG. 12, a further embodiment of the tunnel train station 1 is shown in turn. It takes advantage of seats 24, here in the form of seating, being arranged in the tunnel train station 1. They can be arranged freestanding in the public waiting area 3, e.g. at the side wall 17 of the enclosure 2. Below such seats 24, there is typically freely available space. The filter unit 10 can be arranged in it. It will be embodied in a compact design and, as already disclosed, received in a housing. The filter unit 10 will be preferably (at least additionally) an active system. The filter unit 10 can be retrofitted easily as a module in a tunnel train station 1.
(45) FIG. 13 shows an embodiment similar to FIG. 10. Here, the tunnel train station 1 comprises an escalator 25. In the illustrated embodiment, two escalators 25 (possibly in opposite directions) are arranged adjacent to each other. Between these escalators 25, a separation region is provided in which the filter unit 10 is arranged in an areal arrangement. This space is otherwise unused and is available advantageously for the filter unit 10. The filter unit 10 will preferably be (at least additionally) an active system.
(46) FIG. 14 shows, as already similarly in FIG. 3, the column-shaped structural element 14. The latter in the illustrated embodiment is however not arranged in the transition region 12 but freestanding in the public waiting area 3. Also, the column-shaped structural element 14, in contrast to FIG. 3 (vertical arrangement), is now arranged horizontally. In this embodiment, the column-shaped structural element 14 can serve also as a seat 24 for persons 4. It is understood that the column-shaped structural element 14 for this purpose comprises a housing with corresponding ambient air inlets and outlets, as described above, in order to protect it from damage. The filter unit 10 will be preferably (at least additionally) an active system.
(47) In FIG. 15, an embodiment is illustrated that comprises a hollow space 26 in the public waiting area 3. This hollow space 26 can be, for example, a cable channel or channel for venting of an air conditioning device. It comprises here a grid 27 that ends flush with the floor of the public waiting area 3. Below this grid 27, the filter unit 10 is arranged. Here, correspondingly operated as an active system, it can suck in ambient air from the public waiting area 3 for purposes of purification.
(48) FIG. 16 shows again a display panel 28 that can be understood also as the multimedia device 18 of FIG. 7. The display panel 28 can display, for example, advertising information or information in regard to the route map or the departure times of the vehicles 6. The filter unit 10 is arranged in a space-saving way below the display panel 28 which is arranged freestanding in the public waiting area 3.
(49) In FIG. 17, a tunnel train station 1 is finally shown which comprises a track-guiding element 29 in the transportation route 5. In the illustrated embodiment, two respective pairs of track-guiding elements 29 are arranged spatially adjacent to each other. The track-guiding element 29 can be e.g. a rail. Two track-guiding elements 29 of a pair of track-guiding elements 29 are adjacently arranged at a constant distance. This distance defines a track gauge of the pair of track-guiding elements 29. Between the track-guiding elements 29 there is thus a free space provided. This free space can be provided for receiving the filter unit 10. In the illustrated embodiment, the filter unit 10 is arranged in both pairs of track-guiding elements 29. This arrangement is advantageous because the filter unit 10 is located at the floor of the transportation route 5 in direct vicinity to the source (the vehicle 6) of the ambient air pollutants. The filter unit 10 can be embodied here preferably as a passive system. It is however also possible to operate it (additionally, as needed) as an active system and to increase in this way the separation performance of the filter unit 10.
(50) FIG. 18 comprises, similar to FIG. 17, two neighboring pairs of track-guiding elements 29. The filter unit 10 is arranged here between the two pairs of track-guiding elements 29.
(51) In the illustrated embodiment of a train station 1 of FIG. 19, the filter unit 10 is arranged in the free space 8. This arrangement is particularly advantageous because the free space 8 is already present in most train stations 1 as the illustrated U-shaped molded concrete part. Furthermore, the free space 8 which is typically extending across the entire length of the public waiting area 3 makes available a substantially unobstructed outflow region for the filter unit 10. It can be operated e.g. as a passive system. The vehicles 6 moving into the train station 1 generate in this context a sufficient suction in the ambient air. The filter unit 10 can thus be flowed through e.g. in a length direction of the public waiting area 3. Other flow direction are however also conceivable. Also, the filter unit 10 can be operated (additionally) as an active system in order to increase the separation performance. The filter unit 10 is thus located also at the source of the ambient air pollutants. The efficiency of purification of the ambient air is optimized.
(52) A further advantage of the arrangement of the filter unit 10 in the free space 8 is that it is protected from unauthorized access by persons 4 (and thus also from vandalism). Already existing installation space in the train station 1 is utilized. The clearance profile that is provided for the transportation route 5 is not infringed.
(53) FIG. 19 shows also a protection device 11. It separates the free space 8 from the transportation route 5. Thus, the filter unit 10 is safely enclosed in the free space 8. This protection device 11 can be designed, for example, as a protective grid. This protective grid serves for protection of the filter unit 10 from environmental effects: on the one hand, it protects from vandalism by persons 4; on the other hand, it can also protect against damage of the filter unit 10 by animals (e.g. rodents) present in the transportation route 5. Also, damage by waste or the like that is swirled up by turbulence in the ambient air when a vehicle 6 is moving in/out is prevented. The mesh width of the protective grid is designed such that it causes only a negligibly small pressure loss in the environment of the filter unit 10. The filter unit 10 can be operated still as a passive system (additionally, as needed, as an active system).
(54) FIG. 19 also shows a hollow space 26 in or under the public waiting area 3. This hollow space 26 can serve, for example, as a cable channel or channel for venting an air conditioning device. The filter unit 10 can be arranged in this hollow space 26 (not illustrated). Here, operated accordingly as an active system, it can suck in ambient air above the public waiting area 3 for purposes of purification.
(55) In FIG. 19, finally a train station 1 is shown which comprises in the transportation route 5 a track-guiding element 29. In the illustrated embodiment, two pairs of track-guiding elements 29 are arranged adjacent to each other, spatially neighboring each other. The track-guiding element 29 can be e.g. a rail. Two track-guiding elements 29 of a pair of track-guiding elements 29 are arranged at a constant distance adjacent to each other. This distance defines a track gauge of the pair of track-guiding elements 29. Between the track-guiding elements 29 there is thus a free space available. This free space can be provided for receiving the filter unit 10 (not illustrated). This arrangement is advantageous because the filter unit 10 is located at the floor of the transportation route 5 in direct vicinity to the source (the vehicle 6) of the ambient air pollutants. The filter unit 10 can be operated here preferably as a passive system. However, it is also possible to operate it (additionally, as needed) as an active system and to increase in this way the separation performance of the filter unit 10. The filter unit 10 can also be arranged between the two pairs of track-guiding elements 29 (not illustrated).
(56) The embodiment of the train station 1 according to FIG. 20, which is embodied as a tunnel train station 1, shows it in a cross section view (in relation to a length extension of the transportation route 5). With respect to the arrangement of transportation route 5, public waiting area 3, and vehicle tunnel 7, it does not differ from the afore described embodiment of FIG. 6 in which the filter unit 10 also is received at least partially in a side wall 17 of the enclosure 2. The embodiment of FIG. 20 differs relative thereto in that the side wall 17 comprises a curvature in a plane that extends normal to a length extension of the transportation route 5. The curvature exists in very many tunnel train stations 1 and results due to the employed construction method (tunnel drill). The filter unit 10 is preferably completely integrated or embedded in the curved side wall 17 so that it does not require any space in the public waiting area 3. Between a building shell of the tunnel train station 1 or its enclosure 2 and a cladding, a gap 171 is present which is unused in conventional tunnel train stations 1. This installation space is suitable excellently for arranging the filter unit 10, as illustrated in the Figure. Suitably, the filter unit 10 is an active filter unit, i.e., a filter unit 10 with at least one blower for generating an air flow through at least one filter element. The filter unit 10 comprises in particular at least one air inlet opening and an air outlet opening that are facing toward the public waiting area 3, wherein the at least one filter element is arranged in fluid communication therebetween. The air outlet opening is advantageously arranged above the at least one air inlet opening, which contributes to a particularly effective ambient air purification because it is known that the pollutant concentration, in particular particulate matter concentration, in lower air layers is multiple times higher than in higher air layers. Alternatively or additionally, the air inlet opening can be present in a region of the partition device that is close to the floor.
