DE102013109139A1 - Drying device, vehicle treatment system and method for drying a vehicle - Google Patents

Abstract

The invention relates to a drying device (17) for drying a vehicle (2) in a vehicle treatment plant (1) having at least one fan (18, 18 '), a first flow channel (23) having a first elongated nozzle outlet opening (24) and one of the first Flow passage (23) fluidly separated second flow channel (23 ') with a second elongated nozzle outlet opening (24'), and a method for drying a vehicle (2). The invention solves the problem of allowing a complete drying of the vehicle after the previous cleaning with liquids by a drying device in which the first nozzle outlet opening (24) is longer than the second nozzle outlet opening (24 '), by a vehicle treatment plant (1) Such a drying device (17) and by a method comprising the steps of a) directing a first drying air flow (25) from a relative to a longitudinal direction (L) extending center (M) of the vehicle treatment plant (1) from the first edge region (R) of the wash area (W) beyond the center (M) to another side of the vehicle treatment system (1), and b) passing a second drying air flow (25 ') from a second edge region opposite the first edge region (R) with respect to the center (M) (R ') of the washing area (W) to a front of the center (M) ending area (1).

Description

The invention relates to a drying device according to the preamble of claim 1, a vehicle treatment system according to the preamble of claim 10 and a method for drying a vehicle in a vehicle treatment system according to the preamble of claim 12.

In known vehicle treatment systems, in particular vehicle washing systems, a wide variety of types of drying devices are known. So revealed the DE 35 35 782 A1 an arrangement of two compressed-air nozzles whose jet is an approximately line-shaped jet and relative to the direction of travel at an acute angle and the direction of travel is opposite. The driving off of the water from the vehicle surfaces is achieved by the compressed air nozzles are moved transversely to the vehicle on a carrier and forth. This is cumbersome and expensive in construction.

The EP 1 627 788 B1 discloses a drying device in which the dry air exits through the oblique orientation of the flow channels from the nozzle slots in an oblique direction. The outflow directions are directed outwardly of the center and toward outer ends of the nozzle boxes. The oblique flow direction drives the water from the overhead vehicle surfaces from the center and the overlap region there to the left and right away to the outside of the vehicle to avoid liquid residue. The concentrated outflow of air in the overlap area provides a strong, left and right dividing driving effect for the water on the vehicle surface.

In the US 5,875,565 Dry air is blown across a plurality of nozzles transversely to the vehicle longitudinal direction and partly also counter to the direction of travel, wherein the nozzles are always aligned symmetrically there, so that asymmetrically formed problem areas can not be dried satisfactorily.

In the DE 298 10 804 U1 is blown down by a roof nozzle vertically down to the vehicle surfaces, wherein in the edge region, a portion of the air jet impinges on the vehicle side edges.

The DE 20 2010 005 667 U1 discloses a drying device for vehicles with a roof nozzle arrangement and a side nozzle arrangement. The roof nozzle arrangement has a nozzle box with two blowers, wherein in the central region a substantially normal or slightly oblique air flow and at the side edges of an oblique side beam is emitted.

The US 5,596,818 A shows a dryer for vehicles with multiple nozzles, which partly generate a lateral air flow. To blow off the water from the vehicle surfaces, the nozzles are oscillated transversely to the vehicle longitudinal direction moves, which is complicated and complicated.

The WO 93/03943 A1 discloses paired adjustable air nozzle units for gantry washing with each fixedly arranged on a vertical column air nozzle, which is directed in the drying direction to the vehicle. On the column, a movable arm with a further air nozzle is also attached, so that on each side of the vehicle an oblique air flow is generated.

The DE 20 2004 014 233 U1 discloses a ventilation device for painting and / or drying systems with filter elements and laterally mounted ball nozzle holders. Air is blown vertically onto the vehicle through the filter elements, while a central spherical nozzle generates an air jet which drives symmetrically from the vehicle longitudinal center to the outside.

The drying devices described above have the disadvantage that certain, especially asymmetrically formed problem areas of the vehicle can not be dried sufficiently. Thus, for example, cleaning fluid collects on vehicle parts such as license plate or windshield wipers windshield or rear window, and by the known, symmetrically to the vehicle longitudinal center air-drying drying devices, the cleaning liquid can not be completely blown off. It remains then liquid residues on the vehicle surfaces back, which are distributed during the further driving on the vehicle and leave water marks. In the known drying devices, these liquid residues must be removed by hand laboriously immediately after drying.

The invention is therefore based on the object, a drying device, a vehicle treatment system and a method for drying a vehicle in a vehicle treatment system to provide, which overcome the above-mentioned disadvantages and allow complete drying of the vehicle after the previous cleaning with liquids, even of protruding and asymmetric arranged vehicle parts such as windscreen wipers or license plates.

This object is achieved by the invention by a drying device with the features of claim 1, a vehicle treatment system with the features of claim 10 and a method for drying a vehicle in a vehicle treatment system with the features of claim 12. Advantageous embodiments and expedient developments of the invention are in the specified dependent claims.

An aforementioned drying device according to the invention is characterized in that the first nozzle outlet opening is longer than the second nozzle outlet opening. According to the invention, a vehicle treatment plant mentioned at the outset has a drying device according to the invention which is arranged above the washing area and transversely to a longitudinal direction of the vehicle treatment installation. The drying device advantageously forms the often referred to as a roof nozzle drying device for drying the roof and the other transverse to the longitudinal direction surfaces such as rear and front, windscreen and rear window and engine cover and trunk lid.

As a result, in particular, the parts of the vehicle extending transversely to a longitudinal direction of the vehicle treatment system and parts arranged thereon, such as number plates, etc., and in particular also asymmetrically formed parts and regions of the vehicle, such as the windscreen wipers, can be dried reliably so that no liquid residues remain on the vehicle. In particular, also withdrawn vehicle surfaces or indentations, such. B. the recessed grip for the trunk handle, the trough for the license plate or the area under rear spoilers, especially in vehicles with hatchback, to be cleaned of liquid residues.

Preferably, the first nozzle outlet opening may be at least twice as long as the second nozzle outlet opening, preferably at least two and a half times as long and particularly preferably at least three times as long. In this way, advantageously, the first drying air stream emerging from the first nozzle outlet opening can be driven off over large parts of the vehicle from a first side flank to the other, second side flank.

In this case, the first drying air stream is preferably directed from the first nozzle outlet opening obliquely downward and preferably transversely to the longitudinal direction of the vehicle and in a plane with respect to the nozzle outlet opening angle to the second side edge, preferably at an angle of less than 60 ° and more preferably less than 45 ° ,

More preferably, the first nozzle outlet opening may be at most five times as long as the second nozzle outlet opening, preferably at most four times as long and more preferably at most three and a half times as long. As a result, the region of the second side flank and adjacent vehicle surfaces can advantageously be coated by the second drying air flow of the second nozzle outlet opening so that the liquids abraded from the first to the second side flank are driven off at the second side flank.

In this case, the second drying air stream can preferably be directed from the second nozzle outlet opening obliquely downward and preferably transversely to the longitudinal direction of the vehicle and at a steep angle with respect to the nozzle outlet opening to the second side edge, preferably at an angle of more than 45 ° and particularly preferably more than 60 °.

In a manufacturing technology favorable embodiment, the first nozzle exit opening and the second nozzle exit opening may be formed by a common nozzle slot. This results in a compact design without offset of the nozzle outlet opening or their abutting ends. Advantageously, between the first and the second nozzle outlet opening, a separating plate for the flow separation of the nozzle outlet openings can be provided from each other.

In a further advantageous embodiment, the first flow channel, a first fan and the second flow channel is associated with a second fan, wherein advantageously the first fan may have an impeller with a larger diameter and / or a higher operating speed than the second fan. In this way, the expulsion of the liquid through the first nozzle outlet opening to the second side edge can be additionally supported.

Furthermore, an upper first baffle plate of a first baffle section and a first baffle section closer to the first fan may advantageously be provided between a first outflow opening of the first blower and the first nozzle outlet opening, wherein the first baffle section is inclined steeper to the first nozzle exit opening as the second baffle section.

Preferably, in the vehicle treatment system according to the invention, the first nozzle outlet opening extend beyond the middle of a first edge area of the washing area, viewed from a first longitudinal area of the vehicle treatment installation, and the second Nozzle exit opening from a respect to the center from the first edge region opposite the second edge region of the washing area in front of the center end to direct the liquids from the vehicle surfaces in the region of the first edge region well to the vehicle surfaces in the region of the second edge region and the side edges there.

An initially mentioned method for drying a vehicle in a vehicle treatment installation described above and below is characterized by the steps a) passing a first drying air flow from a first edge area of the wash area beyond the center, viewed from a longitudinal center of the vehicle treatment installation, to another side the vehicle treatment plant, and b) passing a second drying air flow from a second edge area of the washing area opposite the first edge area with respect to the center to a center-ending area. Preferably, the drying air flow can be blown from above obliquely downwards onto the vehicle in order to blow out liquid residues from hidden places.

In this case, to assist the removal of the liquid from the vehicle, the first drying air flow may advantageously be stronger than the second drying air flow. For this purpose, the first drying air flow generated by the first fan may advantageously have a higher volume flow and / or a higher pressure than the second drying air flow generated by the second fan.

In an embodiment which is favorable for drying the entire vehicle, the first drying air flow can be conducted at least partially to a first side flank of the vehicle and / or the second drying air flow can be conducted at least partially to a second side flank of the vehicle opposite the first side flank. As a result, with the one drying device all vehicle surfaces except the bottom can be dried in one operation.

Other features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings. These show:

1 a schematic plan view of a vehicle treatment plant with a schematically illustrated drying device according to the invention;

2 a schematic detail view of the drying device 1 ;

3 a schematic plan view of a nozzle slot of the drying device 2 from underneath.

1 shows a schematic front view of a gantry car wash 1 trained vehicle treatment plant with a retracted vehicle 2 from a vehicle front 3 seen from. The training of such gantry washing systems 1 is familiar to the expert.

With the gantry washing system 1 With the exception of a bottom, the surfaces of the vehicle can 2 , so vehicle front 3 , Engine Hood 4 , Windshield 5 , Top, roof 6 , Side flanks 7 . 7 ' and a not shown rear with rear window etc, to be washed. Likewise, parts of the vehicle projecting from or protruding from the surfaces should be used 2 be washed, for example, one at the front of the vehicle 3 attached, in a license plate recess 8a arranged license plate 8th or windscreen wipers 9 the windshield 5 or the rear disc.

The gantry washing system 1 has a washing portal 10 with two vertical portal columns 11 and 12 on, passing through a horizontal portal traverse 13 connected to each other. There are rotating vertical washing brushes on it 14 . 14 ' and a rotary drivable horizontal washing brush 15 arranged. Alternatively or additionally, cleaning liquid spraying high pressure nozzles can be provided. Such a washing portal 10 is known per se, so that a detailed explanation can be omitted.

The washing portal 10 can at the gantry washer described here 1 in which the vehicle 2 for cleaning in a longitudinal direction L extending Radleitschienen 16 . 16 ' delimited washing area W of the gantry washing system 1 is turned off, in a conventional manner in a longitudinal direction L of the gantry washing system 1 and thus the vehicle 2 be moved across this.

In an alternative, designed as a ride-through vehicle treatment vehicle treatment such washing portals are not movable in the rule, but the vehicle is towed by a towing device on the washing portals with the treatment facilities arranged thereon. The invention can be readily used in all types of vehicle treatment plants, even if the invention is described herein with reference to a movable gantry washing system.

At the laundry portal 10 is a drying device according to the invention, also referred to as a roof-drying nozzle 17 in a known manner arranged height adjustable, so that the drying device 17 can follow the vehicle contour. The drying device serves for this purpose necessary facilities are well known to the skilled person and therefore need not be described.

The drying device 17 , what a 1 only schematically and in 2 is shown in more detail, in a conventional manner, a first fan 18 and a second blower 18 ' on. Here reference numbers without apostrophe refer to parts of the drying device 17 on the left side of the drawings, the corresponding parts on the other, on the right side in the drawings are marked with corresponding reference numerals with apostrophe.

The fans 18 . 18 ' are known per se as radial blower with inflow 19 . 19 ' , not drawn impellers and outflow openings 20 . 20 ' educated.

The outflow openings 20 . 20 ' are on the edge with a first fan box 21 or second fan box 21 ' connected. Here are the fan boxes 21 . 21 ' in 1 drawn partially cut open, leaving an upper first baffle 22 or second baffle 22 ' are clearly recognizable. The first or second fan box 21 . 21 ' thus each form a first flow channel 23 or second flow channel 23 ' from which each of the first and second blower 18 . 18 ' to an elongated first nozzle exit opening 24 or second nozzle outlet opening 24 ' at the outflow end of the flow channels 23 . 23 ' pass. The nozzle outlet openings 24 . 24 ' extend substantially transverse to the longitudinal direction L.

This allows the blower to operate during operation 18 . 18 ' a first drying air flow 25 or second drying air flow 25 ' over the first and second flow channels 23 . 23 ' on the vehicle 2 be directed.

Instead of the two blowers described here 18 . 18 ' Other types of blowers or even just one blower could be used with the two blower boxes 21 . 21 ' connected is.

Preferably, a first baffle section 22a of the first baffle 22 in one of the outflow openings 20 the left first blower 18 closer section to be steeper to the horizontal inclined than a second, flatter baffle section 22b of the first baffle 22 , As a result, the first nozzle outlet opening 24 over its entire length and especially at its first blower 18 fluidly distant end with sufficient first drying air flow 25 be supplied.

The nozzle outlet openings 24 . 24 ' are from their outside ends 26 . 26 ' seen overall wider than the vehicle 2 so that not only the transverse to the longitudinal direction L extending vehicle surfaces can be dried, but also the more or less longitudinally extending side edges 7 . 7 ' ,

As in 3 recognizable, in an advantageous embodiment, the outside ends 26 . 26 ' be widened outwards, so the elongated nozzle outlet opening 24 . 24 ' widen towards the edge to a sufficient for the drying part of the drying air flow 25 . 25 ' on the side flanks 7 . 7 ' to be able to lead.

As in 1 clearly visible, the nozzle outlet openings are sufficient 24 . 24 ' far above a running in the longitudinal direction L center M of the gantry washing system 1 out. Because the vehicle 2 in the washing area W preferably in the middle between the portal columns 11 . 12 is positioned, a vehicle center F usually coincides with the center M or differs only slightly from it. This also ensures that the at the outside ends 26 . 26 ' the nozzle outlet openings 24 . 24 ' leaking portions of the drying air streams 25 . 25 ' also on the side flanks 7 . 7 ' be blown the vehicle.

Thus, by means of the drying air streams 25 . 25 ' both the side flanks 7 . 7 ' as well as transversely to the longitudinal direction L extending surfaces of the vehicle 2 , so vehicle front 3 , Engine Hood 4 , Windshield 5 , Top, roof 6 , Side flanks 7 . 7 ' and rear with rear window etc. to be dried. The drying is done mainly by blowing off on the vehicle 2 located drops of cleaning and / or Abspülflüssigkeit, which previously on the vehicle 2 were applied.

And also for the drying air streams 25 . 25 ' hard-to-reach problem areas around the license plate 8th and the number plate trough 8th , Grips for door and trunk handles or asymmetrical parts like the windscreen wipers 9 , Rear spoilers, where often accumulate fluid residue to be able to dry sufficiently, are the first nozzle outlet opening 24 and the second nozzle exit opening 24 ' with respect to the center M asymmetric. In particular, the drying air streams 25 . 25 ' Seen from the beginning obliquely blown on the vehicle surfaces, that is substantially obliquely in a plane parallel to the longitudinal direction L.

So reaches the first nozzle exit opening 24 starting from the first outflow opening 20 of the first blower 18 far beyond the middle M and thus beyond the vehicle center F addition. This blows the obliquely to the right first Drying air flow 25 the drops located on the surfaces running transversely to the longitudinal direction L extend from the left far beyond the center M and vehicle center F to the right, opposite side flank 7 ' at which the collected liquid drops then drain down.

Thus, z. B. under the in 1 left windshield wiper 9 ' Drops located to the right on the right windscreen wiper 9 ' be blown off, as in 1 through arrows 9 '' indicated. The same applies to the drops that are on the license plate 8th collect, which also by the obliquely rightward drying air flow 25 in 1 be blown off to the right, as in 1 through arrows 8th'' indicated.

In contrast, in conventional drying devices, the symmetrically shaped roof nozzles with symmetrically running drying air streams would blow the drops under the windscreen wipers or on the license plate in the direction of the center of the vehicle, where they would collect.

To make sure that through the first drying air flow 25 Fluid blown from left to right also on the right side flank 7 ' expires, is the right second nozzle outlet opening 24 ' only short and also goes far outward. As a result, the drying air flow 25 ' steeply sloping downwards and thus on the side flank 7 ' directed.

How special in 2 and 3 easily recognizable are in the present drying device 17 the two nozzle outlet openings 24 . 24 ' through a common elongated nozzle slot 27 formed so that the drying air streams are aligned transversely to the longitudinal direction L with each other. The nozzle slot 27 is thereby by a separating plate 28 at the interface of the two baffles 22 . 22 ' in the two nozzle outlet openings 24 . 24 ' divided. In this case, the separating plate 28 in a not shown embodiment also be slightly beveled to the bottom right to the left first drying air flow 25 further to the right and the right second drying air flow 25 ' slightly towards the right side flank 7 ' to guide to blow off in that direction.

Preferably, the left blower 18 which covers most of the vehicle 2 reaching first drying air flow 2 generated, have higher power than the right fan 18 ' , which only a small part of the transverse to the longitudinal direction L extending surfaces and the second side edge 7 ' must blow off. For example, as in 1 indicated schematically, the first fan 18 a larger impeller and thus a larger fan diameter, possibly with a larger inlet opening 19 , as the second blower 18 ' , Alternatively or additionally, the left blower 18 This also operate at a higher speed than the right fan 18 ' By oblique blowing off with the left blower 18 transverse to the longitudinal direction L in particular hidden areas, eg. For example, the areas around the license plate 8th in the license plate recess 8a be freed from liquid residues. With conventional symmetrical uniform blowing of right and left accumulate at such locations usually the liquid residues and then run after the drying process again over the vehicle surfaces, where they must be wiped by hand. In the asymmetric, oblique blowing of the invention, however, the liquid residues are almost completely in the license plate 8a to one side of the license plate 8th blown off and run off while drying. The same applies to similar parts of the vehicle 2 as in the roof area a steep rear spoilers or recessed grips for the door or trunk grips of the vehicle 2 ,

LIST OF REFERENCE NUMBERS

1

Gantry washing system (vehicle treatment plant)

2

vehicle

3

vehicle front

4

Engine Hood

5

Windshield

6

top, roof

7, 7 '

side flanks

8th

license plate

8a

License plate recess

9, 9 '

windshield wipers

10

washing portal

11, 12

portal pillars

13

portal Traverse

14, 14 '

vertical side washing brushes

15

horizontal roof brush

16, 16 '

wheel guide rails

17

drying device

18, 18 '

first or second blower

19, 19 '

Inlet openings Radial fan

20, 20 '

Auströmöffnungen radial fan

21, 21 '

first or second blower box

22, 22 '

first or second baffle

22a, 22b

first and second baffle section of the first baffle

23, 23 '

first or second flow channel

24, 24 '

first and second nozzle outlet opening

25, 25 '

first or second drying air flow

26, 26 '

Outer ends of the nozzle outlet openings

27

common nozzle slot

28

Divider

L

longitudinal direction

F

vehicle center

M

Center of the vehicle treatment plant in the longitudinal direction L

R, R '

lateral edge areas of the washing area W

W

washing area

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3535782 A1 [0002]
• EP 1627788 B1 [0003]
• US 5875565 [0004]
• DE 29810804 U1 [0005]
• DE 202010005667 U1 [0006]
• US 5596818 A [0007]
• WO 93/03943 A1 [0008]
• DE 202004014233 U1 [0009]

Claims (16)

Drying device ( 17 ) for drying a vehicle ( 2 ) in a vehicle treatment plant ( 1 ) with at least one blower ( 18 . 18 ' ), a first flow channel ( 23 ) with a first elongated nozzle outlet opening ( 24 ) and one from the first flow channel ( 23 ) fluidly separated second flow channel ( 23 ' ) with a second elongated nozzle outlet opening ( 24 ' ), characterized in that the first nozzle outlet opening ( 24 ) is longer than the second nozzle outlet opening ( 24 ' ). Drying device ( 17 ) according to claim 1, characterized in that the first nozzle outlet opening ( 24 ) is at least twice as long as the second nozzle outlet opening ( 24 ' ), preferably at least two and a half times as long, and more preferably at least three times as long. Drying device ( 17 ) according to claim 1 or 2, characterized in that the first nozzle outlet opening ( 24 ) is at most five times as long as the second nozzle outlet opening ( 24 ' ), preferably at most four times as long, and more preferably at most three and a half times as long. Drying device ( 17 ) according to one of the preceding claims, characterized in that the first nozzle outlet opening ( 24 ) and the second nozzle outlet opening ( 24 ' ) through a common nozzle slot ( 27 ) are formed. Drying device ( 17 ) according to one of the preceding claims, characterized in that between the first nozzle outlet opening ( 24 ) and the second nozzle outlet opening ( 24 ' ) a separating plate ( 28 ) for flow separation of the nozzle outlet openings ( 24 . 24 ' ) is provided from each other. Drying device ( 17 ) according to one of the preceding claims, characterized in that the first flow channel ( 23 ) a first blower ( 18 ) and the second flow channel ( 23 ' ) a second blower ( 18 ' ) assigned. Drying device ( 17 ) according to claim 6, characterized in that the first blower ( 18 ) has an impeller with a larger diameter and / or a higher operating speed than the second blower ( 18 ' ). Drying device ( 17 ) according to one of the preceding claims, characterized in that the first nozzle outlet opening ( 24 ) and / or the second nozzle outlet opening ( 24 ' ) at their respective outside end ( 26 . 26 ' ) widen. Drying device ( 17 ) according to one of the preceding claims, characterized in that between a first outflow opening ( 20 ) of the first blower ( 18 ) and the first nozzle outlet opening ( 24 ) an upper first baffle ( 22 ) with a first blower ( 18 ) closer first baffle section ( 22a ) and one from the first blower ( 18 ) second baffle section ( 22b ), wherein the first baffle section ( 22a ) steeper to the first nozzle outlet opening ( 24 ) is inclined than the second baffle section ( 22b ). Vehicle treatment plant ( 1 ) with treatment facilities ( 14 . 14 ' . 15 ) for cleaning a in a washing area (W) of the vehicle treatment plant ( 1 ) ( 2 ), characterized in that one above the washing area (W) and transversely to a longitudinal direction (L) of the vehicle treatment plant ( 1 ) arranged drying device ( 17 ) is provided according to one of the preceding claims. Vehicle treatment plant ( 1 ) according to claim 10, characterized in that the first nozzle outlet opening ( 24 ) from a relative to a longitudinal direction (L) extending center (M) of the vehicle treatment plant ( 1 ) seen from the first edge region (R) of the washing area (W) beyond the center (M) extends and the second nozzle outlet opening ( 24 ' ) from a relative to the center (M) from the first edge region (R) opposite the second edge region (R ') of the washing area (W) before the center (M) ends. Method for drying a vehicle ( 2 ) in a vehicle treatment plant ( 1 ) according to one of claims 10 or 11, characterized by the steps a) passing a first drying air stream ( 25 ) from a relative to a longitudinal direction (L) extending center (M) of the vehicle treatment plant ( 1 ) seen from the first edge region (R) of the washing area (W) over the middle (M) on the other side of the vehicle treatment plant ( 1 ), and b) passing a second drying air stream ( 25 ' ) from a second edge area (R ') of the washing area (W) opposite the first edge area (R) with respect to the center (M) to an area ending before the middle (M) ( 1 ). A method according to claim 12, characterized in that the first drying air flow ( 25 ) is stronger than the second drying air stream ( 25 ' ). Method according to one of claims 12 or 13, characterized in that by the first blower ( 18 ) produced first drying air flow ( 25 ) has a higher volume flow and / or a higher pressure than that through the second Blower ( 18 ' ) produced second drying air flow ( 25 ' ). Method according to one of claims 12 to 14, characterized in that the first drying air flow ( 25 ) at least partially to a first side edge ( 7 ) of the vehicle ( 2 ), and / or the second drying air stream ( 25 ' ) at least partially to one of the first side flanks ( 7 ) opposite second side flank ( 7 ' ) of the vehicle ( 2 ). Method according to one of claims 12 to 15, characterized in that the first drying air flow ( 25 ) and / or the second drying air flow ( 25 ' ) - seen from above - be guided transversely or obliquely.

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