CN214355449U

CN214355449U - Ventilation device for vehicle and vehicle door comprising same

Info

Publication number: CN214355449U
Application number: CN202022148565.8U
Authority: CN
Inventors: 大卫·雷米; 阿兰·阮
Original assignee: Faurecia Interieur Industrie SAS
Current assignee: Faurecia Interieur Industrie SAS
Priority date: 2019-09-30
Filing date: 2020-09-27
Publication date: 2021-10-08
Anticipated expiration: 2030-09-27
Also published as: FR3101285A1; FR3101285B1

Abstract

The utility model relates to a door that is used for ventilation unit of vehicle and includes this ventilation unit. The ventilation device (12) comprises a first air passage (18), a second air passage (24) and a closure system (33) for closing the first and second air passages (18, 24). The first and second air passages (18, 24) are arranged such that the air streams exiting the air passages intersect in a ventilation zone. The closure system (33) is reversibly configurable between: -a first configuration, in which the closed system (33) allows air to circulate in the first air passage (18) and prevents air from circulating in the second air passage (24), -a second configuration, in which the closed system (33) prevents air from circulating in the first air passage (18) and allows air to circulate in the second air passage (24), -a third configuration, in which the closed system (33) allows air to circulate in the first air passage (18) and the second air passage (24).

Description

Ventilation device for vehicle and vehicle door comprising same

[ technical field ] A method for producing a semiconductor device

According to a first aspect, the invention relates to a ventilation device for a vehicle, comprising at least a first air duct, which first air duct comprises a first air inlet and a first air outlet, which first air duct is intended to circulate a first air flow in a first flow direction,

at least a second air passage comprising a second air inlet and a second air outlet, the second air passage being intended to circulate a second air flow out in at least a second flow direction,

-a closing system for closing the first and second air passages, the closing system allowing or preventing air to circulate in the first and second air passages.

Ventilation devices are, for example, devices for ventilating, exhausting, cooling or heating. The present invention relates in particular to a ventilation device for a passenger compartment of a vehicle. Such devices are for example arranged to direct the airflow in the passenger compartment of a motor vehicle. Which are typically secured or housed in interior components of the passenger compartment, such as dash boards, door panels, and the like.

The utility model discloses still relate to the door including above-mentioned ventilation unit.

[ background of the invention ]

In the context of so-called "autonomous" vehicles, in which the driver's intervention in the driving of the vehicle is reduced or even scarcely, the arrangement of the passenger compartment may be adjustable by changing the orientation and/or position of the seat, since the seat no longer has to necessarily be turned towards the road. Thus, it is for example possible to foresee turning the seats towards each other and/or placing the seats in an extended position more comfortable for the passengers of the vehicle.

Since one or more passengers no longer occupy the "conventional" manual driving position facing the dashboard of the vehicle, the conventional arrangement of the ventilation device (e.g. near the dashboard) does not provide sufficient comfort for the passengers. Conventional arrangements are not suitable for all positions that a passenger can occupy in the passenger compartment.

Generally, current ventilation devices are less adjustable and only enable the airflow in a limited area of the passenger compartment near the exit of these devices to be directed, for example by using directional vanes.

One of the objects of the present invention is to improve the thermal comfort of the passenger, regardless of the position he occupies in the vehicle, he may be close to the dashboard or far from the dashboard, his seat may be turned towards the road, turned away from the road, or in a position inclined with respect to the road.

[ Utility model ] content

To this end, the invention relates to a ventilation device for a vehicle of the aforementioned type, wherein the device further comprises a ventilation area of the vehicle, which ventilation area is adapted to diffuse a ventilation air flow in a ventilation flow direction, to which ventilation area a first air outlet and a second air outlet lead, which first air outlet and second air outlet are arranged such that the first flow direction and the second flow direction intersect in the ventilation area, the system being further configurable in a reversible manner between:

a first configuration in which the closed system allows a first air flow to circulate in the first air duct and prevents a second air flow to circulate in the second air duct, the flow direction of the ventilation air in the ventilation zone being substantially the first flow direction,

-a second configuration in which the closed system prevents the first air flow from circulating in the first air passage and allows the second air flow to circulate in the second air passage, the direction of flow of ventilation air in the ventilation zone being substantially the second direction of flow, and

a third configuration, in which the closing means allow the first air flow to circulate in the first air passage and the second air flow to circulate in the second air passage, the flow direction of the ventilation air in the ventilation zone having a third flow direction different from the first flow direction and the second flow direction.

Thus, depending on the configuration of the system, the airflow in the ventilation zone has a variable ventilation flow direction. The ventilation device enables to direct an air flow towards the passenger when the passenger occupies a position closer to the outlet of the ventilation device (for example when the passenger occupies a manual driving position), and when the passenger occupies a position further away from the outlet of the ventilation device (for example a relaxed position), or even if the passenger is located facing away from the dashboard.

According to other aspects of the invention, the ventilation device comprises one or more of the following features considered alone or according to any possible technical combination:

-the closure system comprises:

a first closing member for closing the first air passage, which is movable between an open position allowing the first air flow to circulate in the first air passage and a closed position preventing the first air flow from circulating in the first air passage,

a second closing member for closing the second air passage, which is movable between an open position allowing the second air flow to circulate in the second air passage and a closed position preventing the second air flow from circulating in the second air passage,

in a first configuration of the system, the first closure member is in an open position, and the second closure member is in a closed position,

in a second configuration of the device, the first closure member is in a closed position, and the second closure member is in an open position,

in a third configuration of the system, the first and second closure members are in an open position;

the first and second air outlets are arranged such that the first and second flow directions are substantially perpendicular to each other;

the closure system is movable between a plurality of partially closed positions of the first and/or second air passage;

the first air passage and/or the second air passage comprise at least one fin intended to orient the respective direction of the first air flow and/or the second air flow at the outlet of the first air passage and/or the second air passage;

the device comprises a main air supply duct intended to be connected to an air supply device, to which a first air inlet of the first air duct and a second air inlet of the second air duct are connected;

the first and second gas passages comprise a first and a second straight portion, respectively, extending mainly in a first direction and in a second direction substantially parallel to the first direction, the second gas passage further comprising a curved portion in fluid communication with the second straight portion, the curved portion extending between the second straight portion and the second gas outlet for deflecting the second gas flow in the second flow direction at the outlet of the second gas passage;

the device further comprises an air-guiding element located downstream of the first air outlet and the second air outlet, the air-guiding element being arranged to guide a ventilation air flow in the vehicle, the air-guiding element at least partially defining a ventilation zone;

the device further comprises at least one deflecting member arranged opposite the first air outlet to deflect the flow of the first air towards the inside of the passenger compartment.

According to a second aspect, the invention relates to a vehicle door extending in a longitudinal direction, comprising a ventilation device as described above.

According to an advantageous embodiment, the first air outlet is arranged such that the first flow direction is substantially parallel to the longitudinal direction, and the second air outlet is arranged such that the second flow direction is substantially perpendicular to the longitudinal direction.

[ description of the drawings ]

Other aspects and advantages of the invention will become apparent from a reading of the following description, which is given by way of example and made with reference to the accompanying drawings, in which:

figure 1 is a schematic perspective view of a vehicle door according to the invention;

figure 2 is a schematic perspective view of the ventilation device of figure 1 in a first configuration,

figure 3 is a schematic perspective view of the ventilation device of figure 1 in a second configuration,

figure 4 is a schematic perspective view of the ventilation device of figure 1 in a third configuration,

figure 5 is a schematic view along a transverse plane of the device of figure 1.

[ detailed description ] embodiments

In the following, the orientation is the usual orientation of a motor vehicle. The terms "front", "rear", "upper" and "lower" are thus to be understood relative to the normal direction of travel of the motor vehicle, relative to the position of the driver who manually drives the vehicle. Also, the longitudinal direction is defined as a normal running direction of the vehicle, corresponding to the length of the vehicle. The transverse direction is defined as being substantially perpendicular to the longitudinal direction, corresponding to the width of the vehicle. The elevational direction is substantially perpendicular to the longitudinal direction and the lateral direction and corresponds to the height of the vehicle. The orientation terms "inner" and "outer" are understood in the transverse direction. The term "exterior" is understood to be relatively laterally distant from the passenger compartment, and the term "interior" is understood to be relatively laterally close to the passenger compartment.

Fig. 1 presents a vehicle door 10 including a ventilation device 12 according to the present invention.

In the embodiment of fig. 1, the vehicle door 10 is more particularly a door 10 of a motor vehicle.

The door 10 extends in a longitudinal direction L. According to the present invention the ventilation device 12 mainly extends in the main direction P. The main direction P and the longitudinal direction L are substantially parallel or coincide with each other.

A vehicle (not shown) typically includes a floor, at least one seat secured to the floor, and an instrument panel disposed opposite the seat.

The seat is movable in translation relative to the floor in a direction substantially parallel to the longitudinal direction L.

The seat is movable at least between a driving position and a rest position. The distance between the seat and the dashboard is smaller in the driving position than in the rest position.

In the case of a front seat, the first position corresponds to a manual driving position of the vehicle in which the passenger interacts with the vehicle to drive the vehicle.

For example, the second position corresponds to a rest position in, for example, an automatic driving configuration of the vehicle in which the passenger does not drive the vehicle. In the rest position, the seat is towards the front of the vehicle or towards the rear of the vehicle. The seat is for example tilted to improve passenger comfort.

The ventilation device 12 is integrated, for example, in an interior component 14, which is fastened to the door 10, such as a door panel or an interior strip.

The ventilation device 12 is intended to provide a ventilation air flow 31 inside the vehicle, and more particularly inside the passenger compartment of the vehicle. The passenger compartment of the vehicle is intended to accommodate the passengers of the vehicle.

The ventilation airflow 31 is intended to cool, heat or ventilate the passenger compartment of the vehicle.

As a variant, the ventilation device 12 is intended to draw an air flow from the passenger compartment.

As can be seen more particularly in fig. 2 to 3, the ventilation device 12 comprises: a first air passage 18 including a first air inlet 20 and a first air outlet 22; a second air passage 24 including a second air inlet 26 and a second air outlet 28; a ventilation zone 30 of the vehicle, adapted to diffuse a ventilation air flow 31 along a ventilation flow direction F, arranged downstream of the first air outlet 22 and the second air outlet 28; a closure system 33 for closing the first air passage 18 and the second air passage 24, which allows or prevents air to circulate in the first air passage 18 and/or the second air passage 24.

The term "downstream" is defined with reference to the direction of flow of air in the first air passage 18 and the second air passage 24, i.e., from the first air inlet 20/the second air inlet 26 to the first air outlet 22/the second air outlet 28.

The first gas duct 18 is intended to circulate the first gas flow 36 at the outlet in a first flow direction F1.

The first air duct 18 comprises at least a first portion 38 extending mainly in a first direction P1. The first direction P1 coincides with or is substantially parallel to the first flow direction F1F 1.

The first portion 38 is substantially linear.

The first flow direction F1 is substantially coincident with or parallel to the primary direction P.

The second air duct 24 is intended to circulate the second air flow 40 at the outlet at least in the second flow direction F2.

The second air duct 24 comprises at least a second portion 42 extending mainly in the second direction P2. The second direction P2 is substantially parallel to the first direction P1.

The second portion 42 is substantially linear.

The second air passage 24 preferably includes a curved portion 44 in fluid communication with the second straight portion 42. The curved portion 44 extends between the second straight portion 42 and the second air outlet 28. The second gas flow 40 circulating in the second portion 42 of the second gas duct 24 in a direction substantially parallel to the first flow direction F1 is then deflected at the outlet of the second gas duct 24 in the second flow direction F2.

Preferably, the first and

second air outlets

22, 28 are arranged such that the first and second flow directions F1, F2 are substantially perpendicular to each other, and the second flow direction F2 forms a non-zero angle with the first flow direction F1.

The configuration of the first air duct 18 and the second air duct 24 as described above enables a compact ventilation device 12 to be obtained that is easily secured or fused to an interior component 14 of a vehicle, such as, for example, a panel of the door 10.

Preferably, the ventilation device 12 comprises a main air supply duct 46 intended to be connected to an air supply device (not shown). As can be seen in fig. 2-4, the first air passage 18 and the second air passage 24 are fluidly connected to the main air passage 46 and extend downstream of the main air passage 46.

The first air outlet 22 and the second air outlet 28 open into a vented area 30 of the vehicle.

Preferably, the ventilation zone 30 is at least partially defined by an air guide element 48, the air guide element 48 enabling the ventilation air flow 31 of the vehicle interior to be guided.

The air directing element 30 is disposed downstream of the first and

second air outlets

22, 28.

The air guide member 30 communicates with the first air path 18 and the second air path 24 at the first air outlet 22 and the second air outlet 28, respectively.

In the embodiment of fig. 1, the air guide element 30 is housed in an inner face 50 of the door 10, i.e. the face 50 facing towards the inside of the passenger compartment of the vehicle.

The air guide element 30 has the general shape of a groove extending in the main direction P.

The air guide element 30 has a concave inner surface 52 intended to face towards the interior of the vehicle.

For example, a cross section of at least a part of the air guide element 30 along a plane substantially perpendicular to the main direction P has the shape of a V or a U. The shape of the V or U is symmetrical or asymmetrical.

The length of the air guide element 30 in the main direction P is for example between 30cm and 50cm, for example 40 cm.

Advantageously, the first air duct 18 and/or the second air duct 24 comprise at least one fin 54 intended to orient the respective direction of the first air flow 36 and/or the second air flow 40 at the outlet of the first air duct 17 and/or the second air duct 24.

In the example shown (fig. 1 and 5), the second air duct 24 comprises three fins 54. Each fin 54 extends mainly in a direction substantially parallel to the main direction P. Each vane 54 is mounted in a rotationally movable manner relative to the second gas duct 24 about an axis substantially parallel to the main direction P.

The fins 54 enable, for example, the direction of the second airflow 40 to be deflected above or below the vehicle interior.

The closure device 33 comprises, for example, a first closure member 32 of the first air passage 18 and a second closure member 34 of the second air passage 24. The first closure member 32 of the first air passage 18 is movable between an open position that allows the first air flow 36 to flow in the first air passage 18 past the first closure member 32 and a closed position that prevents the first air flow 36 from flowing in the first air passage 18 past the first closure member 32.

The second closure member 34 of the second air passage 24 is movable between an open position that allows the second air flow 40 to flow in the second air passage 24 past the second closure member 34 and a closed position that prevents the second air flow 40 from flowing in the second air passage 24 past the second closure member 34.

Preferably, the first and/or

second closure members

32, 34 are movable between a plurality of partially closed positions of the first and/or

second gas passages

18, 24 between respective open and closed positions.

Each of these partially closed positions is a stable position, that is to say the closure member remains in the partially closed position in which it has been placed without external stress. This makes it possible to adjust the intensity of the airflow passing through the closure member in the first air passage 18 and the second air passage 24, respectively.

Advantageously, the ventilation device 12 also comprises a control system (not shown) of the first closing member 32 and/or of the second closing member 34, which enables the opening of the first closing member 32 and/or of the second closing member 34 to be controlled.

The ventilation device 12 according to the present invention is configurable at least between a first configuration, a second configuration and a third configuration.

In the first configuration (fig. 2), the first closure member 32 is in the open position and the second closure member 34 is in the closed position. Then, only the ventilation air flow 31 at the first air outlet 22 of the first air passage 18 exits in the ventilation area 30 of the ventilation device 12. The direction F of the ventilation air flow 31 in the ventilation zone 30 is substantially the first flow direction F1.

In this configuration, the airflow exiting the first air outlet 22 is directed from the ventilated area 30 to the rear of the vehicle by the air-directing element 48.

This arrangement is used, for example, when the passenger is in a resting position remote from the dashboard.

In the second configuration (fig. 3), the first closure member 32 is in the closed position and the second closure member 34 is in the open position. Thus, in this configuration, only the airflow at the second air outlet 28 of the second air duct 24 exits in the ventilation area 30 of the ventilation device 12. The direction of the ventilation air flow 31 is substantially the second flow direction F2.

In this configuration, the ventilation airflow 31 is more toward the front of the vehicle.

This configuration is used, for example, when the passenger is in a manual driving position of the vehicle.

In the third configuration (fig. 4), the first and

second closure members

32, 34 are in a partially open position. Thus, in this configuration, the direction of the ventilation air flow 31 in the ventilation zone 30 has a third flow direction F3 that is different from the first flow direction F1 and the second flow direction F2. This is an intermediate direction between the first flow direction F1 and the second flow direction F2.

In this configuration, the first airflow 36 and the second airflow 40 are blocked from each other in the ventilation zone 30.

The directionality of the ventilation air flow 31 in the main direction P (longitudinal direction) by the first air flow 36 and the second air flow 40 is controlled by the intensity of the first air flow 36 from the first air outlet 22. The intensity of the first air flow 36 is controlled by the partial opening of the first closure member 32.

The third configuration is an intermediate configuration in which the first closure member 32 and/or the second closure member 34 are in such a closed position: which is an intermediate position that partially encloses the first air passage 18 and the second air passage 24, respectively.

This configuration serves to more accurately control the directionality of the ventilation air flow 31 in the longitudinal direction L. It is always used, for example, when the passenger is in the manual driving position or in the rest position, to control the orientation of the ventilation air flow, thus improving thermal comfort.

Advantageously, the ventilation device 12 also comprises a deflector member (not shown) arranged opposite the first air outlet 22 to deflect the first air flow 36 towards the interior of the passenger compartment, in particular when the ventilation system 12 is placed in the first configuration (fig. 2).

In fact, in the first configuration, the ventilation air flow 31 follows, for example, the guide element 48 along the door in a direction substantially parallel to the longitudinal direction L. The deflecting member enables the ventilation air flow 31 to be deflected towards the inside of the passenger compartment.

The deflecting member is formed, for example, by a variation of the geometry of the guide element 48, so as to form a projection towards the inside of the passenger compartment.

As a variant, the deflecting member is formed by a variation of the geometry of the door 10, so as to form a projection towards the inside of the passenger compartment.

Still as a variant, the deflecting member is an inlay element fixed to a pillar ("B-pillar") between the front and rear seats projecting from the door 10, the guide element 48 or to the rear door.

Still advantageously, the closing means 33 can be actuated automatically, in particular as a function of the longitudinal position of the seat and/or as a function of the angular position of the seat relative to the longitudinal direction L.

Thus, for example, if the front row of seats is in a position facing away from the road, the system 33 moves into the first configuration (fig. 2). The ventilation air flow 31 is then directed towards the passenger by means of the deflecting member.

As a modification, for example, the closer the seat is to the instrument panel, the greater the amount of airflow in the second air duct 24, and the smaller the amount of airflow in the first air duct 18.

In the embodiment of fig. 1 to 5, the second closure member 34 is gradually moved from the closed position to the open position as the seat approaches the dashboard, and in parallel, the first closure member 32 is gradually moved from the open position to the closed position. Thus, depending on the amount of airflow in each of the

air ducts

18, 24, the direction of the ventilation airflow 31 at the ventilation zone 30 gradually changes between a direction substantially parallel to the longitudinal direction (fig. 2) (away from the instrument panel for the passenger) and a direction substantially perpendicular to the longitudinal direction (fig. 3) by passing through a plurality of intermediate positions (fig. 4), thereby enabling the ventilation airflow 31 to be provided for a plurality of longitudinal positions of the passenger seat.

The ventilation device 12 according to the invention is then particularly advantageous in that it makes it possible to direct the ventilation air flow 31 towards the front of the vehicle, for example when the passenger is in the driving position, while at the same time directing the ventilation air flow 31 towards the rear of the vehicle, for example when the passenger is in a comfortable position facing away from the dashboard. The device 12 makes it possible to easily adjust the directionality of the ventilation air flow 31 in the longitudinal direction L.

In addition, the ventilation device 12 may be fitted in a rear door of the vehicle.

According to one embodiment, each door of the vehicle includes a vent 12.

As a variant, the ventilation device 12 merges into another interior component, such as a center console or the like, which is arranged between the seats.

According to one embodiment (not shown), the closing means 33 comprises a three-way proportional valve (e.g. a rotary valve body) instead of the first and

second closing members

32, 34, which is connected upstream of the main air duct 46 and downstream of the first air inlet 20 of the first air duct 18 and the second air inlet 26 of the second air duct 24.

Claims

1. A ventilation device (12) for a vehicle, the ventilation device (12) comprising:

-at least a first air duct (18) comprising a first air inlet (20) and a first air outlet (22), the first air duct (18) being intended to circulate a first air flow (36) out in a first flow direction (F1),

-at least a second air duct (24) comprising a second air inlet (26) and a second air outlet (28), the second air duct (24) being intended to circulate a second air flow (40) out in at least a second flow direction (F2),

-a closing system (33) for closing the first air duct (18) and the second air duct (24), the closing system (33) allowing or preventing air to circulate in the first air duct (18) and the second air duct (24),

characterized in that the ventilation device (12) further comprises a ventilation zone (30) of the vehicle adapted to diffusing a ventilation air flow (31) in a ventilation flow direction (F), the first air outlet (22) and the second air outlet (28) opening into said ventilation zone, the first air outlet (22) and the second air outlet (28) being arranged such that the first flow direction (F1) and the second flow direction (F2) intersect in the ventilation zone (30),

the closure system (33) may also be reversibly configurable between:

-a first configuration in which the closed system (33) allows the circulation of the first air flow (36) in the first air duct (18) and prevents the circulation of the second air flow (40) in the second air duct (24), the flow direction (F) of the ventilation air in the ventilation zone (30) being a first flow direction (F1),

-a second configuration in which the closed system (33) prevents the circulation of the first air flow (36) in the first air duct (18) and allows the circulation of the second air flow (40) in the second air duct (24), the flow direction (F) of the ventilation air in the ventilation zone (30) being a second flow direction (F2), and

-a third configuration, in which the closed system (33) allows the first air flow (36) to circulate in the first air duct (18) and the second air flow (40) to circulate in the second air duct (24), the flow direction (F) of the ventilation air in the ventilation zone having a third flow direction different from the first and second flow directions (F1, F2).

2. The ventilation device (12) according to claim 1, wherein the closed system (33) comprises:

a first closure member (32) for closing the first air passage (18) movable between an open position allowing the first air flow (36) to circulate in the first air passage (18) and a closed position preventing the first air flow (36) from circulating in the first air passage (18),

a second closing member (34) for closing the second air duct (24) movable between an open position allowing the second air flow (40) to circulate in the second air duct (24) and a closed position preventing the second air flow (40) from circulating in the second air duct (24),

in a first configuration of the closure system (33), the first closure member (32) is in an open position and the second closure member (34) is in a closed position,

in a second configuration of the closure system (33), the first closure member (32) is in a closed position and the second closure member (34) is in an open position,

in a third configuration of the closure system (33), the first closure member (32) and the second closure member (34) are in an open position.

3. The ventilation device (12) according to claim 1 or 2, wherein the first air outlet (22) and the second air outlet (28) are arranged such that the first flow direction (F1) and the second flow direction (F2) are perpendicular to each other.

4. The ventilation device (12) according to claim 1 or 2, wherein the closure system (33) is movable between a plurality of partially closed positions of the first air duct (18) and/or the second air duct (24).

5. The ventilation device (12) according to claim 1 or 2, wherein the first air passage (18) and/or the second air passage (24) comprise at least one fin (54) intended to orient the respective direction of the first air flow (36) and/or the second air flow (40) at the outlet of the first air passage (18) and/or the second air passage (24).

6. The ventilation device (12) according to claim 1 or 2, comprising a main air supply duct (46) intended to be connected to an air supply device, the first air inlet (20) of the first air duct (18) and the second air inlet (26) of the second air duct (24) being connected to said main air supply duct (46).

7. The ventilation device (12) according to claim 1 or 2, wherein the first air passage (18) and the second air passage (24) comprise a first straight portion (38) and a second straight portion (42) extending mainly in a first direction and a second direction parallel to the first direction, respectively, the second air passage (24) further comprising a curved portion (44) in fluid communication with the second straight portion (42), the curved portion (44) extending between the second straight portion (42) and the second air outlet (28) for deflecting the second air flow (40) in the second flow direction (F2) at the outlet of the second air passage (24).

8. The ventilation device (12) according to claim 1 or 2, further comprising an air-guiding element (48) located downstream of the first air outlet (22) and the second air outlet (28), the air-guiding element (48) being arranged to guide a ventilation air flow (31) in the vehicle, the air-guiding element (48) at least partially defining the ventilation area (30).

9. The ventilation device (12) according to claim 1 or 2, comprising at least one deflecting member arranged opposite the first air outlet (22) to deflect the first air flow (36) towards the inside of the passenger compartment.

10. Vehicle door extending in a longitudinal direction (L) and comprising a ventilation device (12) according to claim 1 or 2.

11. The vehicle door according to claim 10, wherein the first air outlet (22) is arranged such that the first flow direction (F1) is parallel to the longitudinal direction (L), and the second air outlet (28) is arranged such that the second flow direction (F2) is perpendicular to the longitudinal direction (L).