CN113815385A

CN113815385A - Vehicle ventilation system

Info

Publication number: CN113815385A
Application number: CN202110673202.2A
Authority: CN
Inventors: 卡斯滕·斯达克; 沃尔克·舍尔
Original assignee: Ford Global Technologies LLC
Current assignee: Ford Global Technologies LLC
Priority date: 2020-06-19
Filing date: 2021-06-17
Publication date: 2021-12-21
Also published as: DE102020207599A1

Abstract

The invention relates to a ventilation system (1) for a vehicle having a vehicle seat (10) with a head restraint (13), the head restraint (13) defining a head region (20) of an occupant arranged upstream thereof in a longitudinal direction (X), wherein the ventilation system (1) is designed to discharge an air flow (L) into an interior (30) of the vehicle. In order to improve the protection of occupants of a vehicle against diseases transmitted by air, it is provided according to the invention that at least one air outlet (8) arranged on the side of a head restraint (13) on a vehicle seat (10) is designed to discharge an air flow (L) at least partially into a head region (20), and that a disinfection device (3) arranged upstream of the air outlet (8) is designed to remove pathogens from the air flow (L).

Description

Vehicle ventilation system

Technical Field

The present invention relates to a vehicle ventilation system having the features of the preamble of claim 1.

Background

Ventilation systems in vehicles, in particular motor vehicles such as passenger vehicles, have a filter through which fresh air received from the vehicle surroundings can be purified before entering the interior and being inhaled by the occupants. In this case, depending on the design, organic and inorganic particles, pollen, aerosols and other components contained in the air that may cause injury to the occupants may be removed by the respective filters, and also pathogens such as bacteria or viruses may be removed. Gaseous components such as nitrogen oxides may also be removed by activated carbon filters. It is also known to filter air received from the vehicle interior in a recirculation air mode using a similar filter before discharging it back into the interior.

However, the above system does not provide any effective protection in the case where one of the occupants of the vehicle suffers from an airborne disease. In this case, the infection is typically caused by droplets or aerosols that are dispersed inside the vehicle and may infect other occupants before they pass through the filter. These conventional ventilation systems do not provide pathogen free air within the vehicle interior. Thus, in conventional ventilation systems, other occupants are at risk of infection, particularly in situations where the infected person is not initially aware of the various diseases to which it is infected.

US 2018/0079278 a1 discloses a vehicle ventilation system comprising a sensor element, means for drawing air from the vehicle interior, means for supplying air to the vehicle interior, and a controller for the above means using signals from the sensor element. The sensor element is designed to detect when the passenger exhales. The means for discharging air from the vehicle interior and/or the means for supplying air to the vehicle interior are constructed such that they are adapted to the breathing frequency of the passengers and/or the propagation delay of the exhaled and inhaled air components. The means for drawing air is configured such that the exhaled air component is removed primarily. RU 2626789C 2 of the same applicant discloses a similar system.

In view of the stated prior art, there is still room for further improvement in the protection of occupants of vehicles from diseases transmitted through the air.

Disclosure of Invention

It is an object of the present invention to improve the way in which vehicle occupants are protected against diseases transmitted through the air.

According to the invention, this object is achieved by a ventilation system having the features of claim 1, wherein the dependent claims relate to advantageous embodiments of the invention.

It should be pointed out that the features and measures which are individually set forth in the following description can be combined in any technically convenient manner and further disclose other embodiments of the invention. The specification further features and describes the invention, particularly with reference to the drawings.

A ventilation system for a vehicle is provided by the present invention. The vehicle may in particular be a motor vehicle, such as a passenger motor vehicle, a truck or a bus. However, the application of the invention is also conceivable for other land vehicles, such as trams or trains, cable cars, but also for ships or aircraft, in particular commercial aircraft. The vehicle has a vehicle seat with a head restraint which defines a head region of an occupant arranged upstream thereof in the longitudinal direction. The vehicle seat is naturally configured such that an occupant of the vehicle sits thereon. Generally, a vehicle seat has a seat surface and a backrest, with a head restraint abutting the backrest on an upper surface. In this case, it is naturally possible that the head restraint is configured to be at least partially integrally formed with the backrest and optionally to form an upper part of the backrest. When the vehicle seat is used as intended, the longitudinal direction parallel to the line of sight of the occupant or even parallel thereto when looking straight ahead is determined by the structure of the vehicle seat. In a vehicle seat or a passenger seat of a motor vehicle, the longitudinal direction corresponds to the vehicle longitudinal direction (X-direction). When used as intended, the head of the occupant is located longitudinally upstream of the head restraint such that the head restraint defines a head region in which the head of the occupant is disposed during use.

Ventilation systems are designed to discharge a flow of air into the vehicle interior. The air flow serves for ventilation and optionally also for air conditioning of the interior of the vehicle. In this regard, the ventilation system may be part of an air conditioning system, or at least part of the ventilation system may form part of an air conditioning system. Ventilation systems typically generate air flow from one or more fans, typically electrically operated. In principle, however, it is also conceivable to generate the air flow passively at least temporarily by the driving wind of the vehicle. The ventilation system may divide the air flow and discharge the air flow to various locations and/or to the interior of the vehicle via a plurality of air outlets. The ventilation system may have one or more lines and/or (air) channels for guiding the air flow.

According to the invention, at least one air outlet arranged on a side of the head restraint on the vehicle seat is designed to discharge an air flow at least partially into the head region. The air outlets are arranged laterally of the head restraint in the transverse direction (i.e. transversely to the longitudinal direction), i.e. in the case of a vehicle seat oriented in the vehicle longitudinal direction, the respective air outlets are arranged laterally of the head restraint in the vehicle transverse direction. Typically, the air outlet is offset in a lateral direction with respect to the head restraint. In the vertical direction, the air outlet is usually arranged wholly or partly at the height of the head restraint. The air outlet is arranged on the vehicle seat and is at the same time connected to the vehicle seat and/or configured as part of the vehicle seat. The air discharged from the air outlet to the head region generally represents only a part of the overall ventilation system, but is hereinafter simply referred to as "air flow", rather than "air flow and/or a part of air flow". By being positioned at the side of the head restraint, the air outlet is able to discharge an air flow to the head region without the air flow being substantially obstructed by the head of an occupant positioned on the head restraint. In this case, the ventilation system may be designed such that the air flow discharged from the air outlet is configured in a turbulent and/or laminar manner. According to a preferred embodiment, the air flow discharged from the air outlet is configured in an at least substantially laminar manner, whereby turbulence and mixing with surrounding air, which may be non-sterile, may be minimized. The air flow discharged from the air outlet into the head region is at least proportionally directed forwards, i.e. is positioned away from the vehicle seat in the longitudinal direction. In addition, the air flow can also be directed proportionally inwards, i.e. in the lateral direction towards the center plane of the vehicle seat. Thus, the air outlets may be directed obliquely inwards. The air outlet is configured to discharge at least a portion of the air flow into the head region, wherein the air outlet is preferably designed to discharge this air flow into the mouth-nose region, in which the nose and/or the mouth of the occupant is arranged, when the vehicle seat is used as intended.

Furthermore, according to the invention, the disinfection device arranged upstream of the air outlet is designed to remove pathogens from the air stream. The sterilizing device is arranged upstream of the air outlet with respect to the air flow, i.e. the air flow passes the sterilizing device before reaching the air outlet. The disinfection device is designed to remove pathogens from the air stream, thereby disinfecting the air stream. In this case, microorganisms such as bacteria or fungi, and in particular viruses capable of causing diseases in living organisms, particularly humans, are considered as pathogens. Pathogens are also considered to have been "cleared" when their residues are still present in the air stream, but these residues are no longer capable of causing infection. It goes without saying that complete elimination of all pathogens, i.e. complete sterilization, may not always be guaranteed with reasonable technical effort. In this regard, the disinfection device may be designed to remove, for example, at least 99.9% of all pathogens, at least 99.99% of all pathogens, or at least 99.999% of all pathogens from the air stream. In this sense, the air flow that has passed through the disinfection device may be considered (substantially) bacteria-free or sterile. The air flow thus sterilized is conveyed directly or indirectly to the air outlet and from there into the head region.

The invention is based on the recognition that in the presence of infected persons in the interior of a vehicle it is not possible to maintain air sterility throughout the interior, since the air emitted by such persons while breathing or particularly when coughing or sneezing, can be spread widely throughout the interior before it is sucked away, filtered and/or disinfected. According to the invention, this can be remedied by the air volume generated in the head region for the (possibly not yet infected) occupant, which is at least substantially conveyed by the air flow discharged from the air outlet and can therefore be regarded as being at least substantially sterile. In particular, an air volume can be generated in the mouth-nose region described above. Other potentially non-sterile air within the interior of the vehicle may be completely or at least substantially away from the head region (and/or mouth-nose region).

According to a preferred embodiment, at least one air outlet is arranged on either side and on one side of the head restraint in each case. It goes without saying that each of these air outlets itself discharges a portion of the air flow into the head region, and that a disinfection device is arranged upstream of each air outlet. Depending on the embodiment, in this case a common disinfection device for the air outlet may be provided on either side of the head restraint, or a dedicated disinfection device may be provided on each side of the head restraint. In general, the air flow in the head region can be better controlled by arranging the air outlets on both sides, and it is also possible to prevent, for example, contaminated air from reaching the head of the occupant from the side on which the air outlets are not provided. In other words, with the embodiments described herein, the head of the occupant is generally better protected relative to potentially contaminated air in the interior.

According to a preferred embodiment, the vehicle seat has a fan portion with a fan surface facing forward, which is arranged on the side of the head restraint and above the backrest, and on which at least one air outlet is arranged. In this case, the fan section can be constructed in the manner of a wall and extend to the side and above and below the air outlet, so that the area of the air outlet is shielded with respect to the air flowing in from behind. In this way, the risk of such air flowing in from behind mixing with sterile air from the air outlet is prevented. The fan section can preferably directly adjoin the backrest and/or the head restraint, so that in this case no air can pass from the rear to the front into the head region. The fan surface is the surface of the fan portion where the at least one air outlet is arranged. The fan surface faces forward (in the longitudinal direction), but this does not usually mean that the path of the fan surface is exactly perpendicular to the longitudinal direction.

Advantageously, the at least one air outlet can be adjusted so as to change the direction and/or the volume flow of the discharged air flow. In this case, it may be manually and/or automatically adjusted. For example, by adjusting the direction of the air flow, various positions and/or sizes of the head may be accommodated, which may be different among the various occupants, respectively. Furthermore, the occupant can adjust the air flow in a variable manner according to personal preferences, so that, for example, facial draughts which are considered unpleasant can be avoided. The same applies to the regulation of the volume flow which may be considered unpleasant. In this case, the limit values determined with respect to the direction and the intensity of the volume flow can be predetermined, so that the intended protective effect of the air flow according to the invention is prevented from being greatly impaired. Alternatively or additionally, in the event that the above-described protective effect may be impaired when the setting is changed according to the will of the occupant, a warning and/or an indication may also be output on the vehicle side.

Although the protective effect is substantially ensured due to the air flow discharged from the at least one air outlet, turbulence may potentially be generated in the non-sterile ambient air, for example, which in turn may cause a risk of occupant infection. In this case, it is natural to evaluate the potential impact of the infection type and the disease to be feared on the occupants, while taking into account their general health. The safety of the ventilation system can be even further improved, for example, if special protection requirements are placed on occupants belonging to high risk groups. According to one refinement, the ventilation system has a breathing mask for the occupant, which breathing mask is attachable to the at least one air outlet via a connecting tube. In this case, the breathing mask naturally serves to supply air to the occupant, and is preferably configured so that it can be placed and worn by the occupant. For this purpose, the breathing mask may, for example, have elastic bands or straps by means of which it can be fixed to the head of the occupant. Preferably, the respiratory mask is configured to cover the entire mouth and nose of the occupant. The respiratory mask may have one or more valves through which the occupant's breathing air may be discharged into the ambient environment when exhaling. The air is supplied to the breathing mask by means of at least one connecting tube which can be connected or permanently connected on the one hand to the breathing mask and on the other hand to an air outlet. For this purpose, the air outlet and the connecting tube can have connecting elements which are matched to one another, whereby a rigid and/or non-rigid connection can be formed. Thus, in the operating state, a direct connection is provided between the air outlet and the connecting tube, wherein the air flow reaches the breathing mask directly through the connecting tube and can be inhaled by the occupant through said breathing mask. In this system, the ingress of non-sterile air is almost eliminated.

Depending on the circumstances, there may be a risk that the ambient air of the vehicle contains pathogens which must be removed by the disinfection device before they enter the head region and are inhaled by the occupants. In this respect, the use of the disinfection device is at least periodically indicated when the air flow is generated solely by using ambient air. In particular, it is certainly necessary to perform disinfection when the air supplied to the head region comes at least proportionally from the vehicle interior, i.e. when the ventilation system operates in a circulating air mode. Preferably, the ventilation system is designed to at least partially generate an air flow by removing air from the interior. In this case, "partially" refers to both the air flow composition at a particular point in time and its potentially changing composition over time. In other words, the air flow at a certain point in time is generated by intake air coming entirely from the surroundings of the vehicle, by intake air coming entirely from the interior, or by intake air coming proportionally from the interior and the surroundings, and for example, at a first point in time the air flow is generated by intake air coming entirely from the surroundings, and at a second point in time the air flow is generated by intake air coming entirely from the interior. In any case, the air used to generate the airflow discharged to the head area comes at least partially from the interior of the vehicle, and in this regard, the risk of inclusion of pathogens is greater in the presence of infected occupants. In particular, this air must be treated by the disinfection device.

Preferably, the vehicle seat has a disinfection device. In particular, the disinfection device may be integrated in a vehicle seat. In this case, on the one hand, when the disinfection device is arranged as close as possible in space to the at least one air outlet, there is provided the advantage that the air flow only needs to cover a short path to the air outlet, which minimizes the possibility of the air flow absorbing pathogens, which in the worst case may be present on surfaces within the ventilation system. On the other hand, such an arrangement of the disinfection device on the vehicle seat may facilitate maintenance or may also potentially simplify the retrofitting of the components of the ventilation system according to the invention. The disinfection device together with the fan for generating the air flow can be located, for example, in a housing on a vehicle seat, wherein the air outlet is also arranged on the housing.

As regards the mode of operation of the disinfection device, various possibilities are provided, which may be used as alternatives or even in combination with each other. According to one embodiment, the disinfection device has a filter device designed to remove pathogens in an air stream by filtration. In this case, the filter device is capable of filtering out individual pathogens (bacteria, viruses). Alternatively, it may be sufficient if the filter device is capable of filtering out droplets containing pathogens therein. Preferably, the filter device is designed to filter out particles with a minimum size of 1 μm, a minimum size of 100nm, or even a minimum size of 10nm, wherein it goes without saying that complete filtration cannot be guaranteed, but for example a filtration efficiency of at least 99%, at least 99.9% or more. Another measure of the quality of the filter device is the filtration efficiency relative to the particles of the size that is most difficult to filter out and is denoted MPPS (most penetrating particle size). The diameter of these particles is between 0.1 μm and 0.5. mu.m, in particular 0.3. mu.m. These particles are preferably removed from the air stream to at least 99.9%, further preferably to at least 99.95%, particularly preferably to at least 99.97%. In particular, the filter device can have a suspension filter (HEPA: high efficiency air particle filter), a high performance suspension filter (ULPA: ultra low permeability air filter) and/or an activated carbon filter. The activated carbon filter is generally not a particularly effective particulate filter and therefore may preferably be combined with at least one other filter (e.g. HEPA or ULPA). In addition to simply removing pathogens from the air stream, the filter device may also be designed to destroy the filtered pathogens, for example by means of a suitable surface coating.

Alternatively or additionally, the disinfection device may have a neutralization device designed to neutralize pathogens. Neutralization may occur when the pathogens are located in the air stream and/or when the pathogens have accumulated (temporarily or permanently) on the surface of the disinfection device (e.g. the surface of the filter device). In general, it can be said that pathogens originating from the air stream can be neutralized. Pathogens are considered to be neutralized in this case when they are no longer able to cause infection and/or are no longer able to spread. With the loss of reproductive capacity, the corresponding microorganisms or viruses can no longer cause disease, even if the air stream still contains residues thereof. In addition to "neutralizing," this may also mean "killing" and/or "destroying" pathogens. The disinfection device may have an ionization device that directly or indirectly ionizes the air flow and/or parts thereof. In other words, it causes plasma formation and, therefore, leads to various processes that kill and/or destroy microorganisms and viruses. The generation of ultraviolet radiation may form part of the associated processes, as well as the influence of ions on the formation of pathogens or free radicals. The disinfection device may also have an ultraviolet light source that neutralizes pathogens by ultraviolet light. Various devices known in the art may be used as the ultraviolet light source, such as an ultraviolet LED.

In particular, since the moisture in the air stream can also be removed by the filter device, it is also advisable if the ventilation system has a humidifier, which is designed to increase the moisture content of the air stream upstream of the at least one air outlet. Thus, naturally, the moisture content of the air stream discharged into the head region also increases. Typically, the humidifier is arranged upstream of the air outlet, but downstream of the disinfection device. Alternatively or additionally, a fragrance may also be added to the air stream. This may be achieved by a humidifier or an additional device.

Drawings

Further advantageous details and effects of the invention are described in more detail hereinafter with reference to exemplary embodiments shown in the drawings, in which:

figure 1 shows a perspective view of a vehicle seat with elements of a ventilation system according to the invention;

fig. 2 shows a schematic cross-sectional view of the vehicle seat of fig. 1 in a side view;

FIG. 3 shows a top view of the vehicle seat of FIG. 1;

fig. 4 shows a top view of a vehicle seat and a breathing mask.

Detailed Description

In the various figures, identical components are always provided with the same reference numerals, which is why these components are usually described only once.

Fig. 1 to 4 show a vehicle seat 10 with components of a ventilation system 1 according to the invention. The vehicle seat 10 may be installed in a motor vehicle, such as a passenger car, truck or bus, but may also be provided for a different land vehicle, aircraft or watercraft. The vehicle seat 10 has a seat cushion 11, a seatback 12, and a head restraint 13.

If an occupant is seated in the vehicle seat 10, their head is located in a head region 20, which head region 20 is arranged upstream of the head restraint 13 in the longitudinal direction X. In this case, the mouth and nose are located at least substantially in the mouth-nose region 21. Upon inhalation, the occupant inhales air directly from the head region 20 and/or from the mouth-nose region 21. In order to prevent as far as possible the occupants from being infected by airborne diseases, it is provided that the above-mentioned area is continuously supplied with air completely or substantially free of pathogens. To ensure this, two fan sections 14, each having an air outlet 8 on a fan surface 15, are arranged on both sides of the head restraint 13 in the transverse direction Y. The respective air outlet 8 is configured as part of the ventilation system 1 to discharge a portion of the air flow L to the head region 20 and/or the mouth-nose region 21.

The fan surface 15 and the respective air outlet 8 are directed forward, wherein the air outlet 8 is adjustable in order to vary the exact direction of the discharged air flow L and its volume flow. Generally, as shown in fig. 3, the air flow L is oriented slightly inward, i.e., toward the center plane of the vehicle seat 10. The air flow L outside the respective air outlet 8 may be configured at least in a substantially laminar manner in order to minimize turbulence and mixing with the surrounding air. Thus, substantially or all of the air inhaled by the occupant in the head region 20 and/or mouth-nose region 21 comes from the air outlet 8. This is assisted by the respective fan portions 14 abutting the backrest 12 at the top and the head restraint 13 at the sides, the fan portions 14 being free of gaps (in the vertical direction Z). The fan section thus forms a shield for air a which flows in from behind and which may, for example, have been exhaled by a passenger sitting further behind.

In order to ensure that the air flow L discharged in the head region 20 is as sterile as possible, the ventilation system 1 has a disinfection device 3, the disinfection device 3 being arranged in an air channel 2, the air channel 2 extending within the vehicle seat 10 and leading to the air outlet 8. As schematically shown in fig. 2, the disinfection device 3 may have a filter device 4 with a suspension filter (HEPA: high efficiency air particle filter), a high performance suspension filter (ULPA: ultra low permeability air filter) and/or an activated carbon filter, so that it is possible to filter out liquid droplets contained in the air stream L, even individual pathogens (fungi, bacteria or viruses). Additionally or alternatively, a neutralization device 5 may be provided, for example an ionization device for neutralizing pathogens by plasma sterilization, or a UV light source for neutralizing pathogens by UV light. The integration of the disinfection device 3 in the vehicle seat 10 potentially simplifies its installation and maintenance and also ensures a relatively short path for the stream of disinfection air L to the air outlet 8. Therefore, it is impossible to further absorb pathogens that may be located on the surface inside the air passage 2.

Furthermore, at least one electric fan 6 is arranged inside the vehicle seat 10, which keeps the air flow L flowing to the air outlet 8. The power of the fan 6 is controllable, i.e. a variable intensity air flow is generated. Wherein the air flow intensity can be adapted at least to the capacity of the disinfection device 3, but also to the capacity of the ionization device 5, etc., but should not exceed this intensity. In the exemplary embodiment, the fan 6 is arranged upstream of the air outlet 8, but downstream of the disinfection device 3. Alternatively, however, the fan may also be arranged upstream thereof. In addition to this, since the filter device 4 also extracts moisture from the air flow L, a humidifier 7 that returns moisture to the air flow L may be provided downstream of the sterilizing device 3. In addition, fragrance may be added to the air flow L by a humidifier 7 or other means (not shown here). The ventilation system 1 can, on the one hand, remove air for generating the air flow L from the surroundings of the vehicle, but, on the other hand, can also remove corresponding air from the interior 30 of the vehicle, so that the ventilation system 1 is operated at least partially in a circulating air mode. In this case, the ratio of ambient air and internal air in the air flow L may also vary over time.

By using a breathing mask 25 as shown in fig. 4, the protection of the occupant can be further improved. The breathing mask may have, for example, elastic straps or bands (not shown here) by means of which it can be fixed to the head of the occupant. The respiratory mask is configured to completely cover the mouth and nose of the occupant. The respiratory mask has a valve 26 through which the occupant's breathing air may be discharged into the interior 30 when exhaling. Air is supplied to the breathing mask 25 via two supply tubes 27, each of which can be connected to one of the air outlets 8. For example, a respiratory mask may be used when the occupant belongs to a high risk group and therefore must be specially protected.

List of reference numerals

1 Ventilation System

2 air channel

3 sterilizing device

4 filtering device

5 neutralizing device

6 Fan

7 humidifier

8 air outlet

10 vehicle seat

11 seat surface

12 backrest

13 head protection device

14 fan part

15 surface of fan

20 head region

21 mouth-nose region

25 breathing mask

26 valve

27 connecting pipe

30 inner part

A inflow of air

L air flow

In the X longitudinal direction

Y transverse direction

In the Z vertical direction

Claims

1. Ventilation system (1) for a vehicle having a vehicle seat (10) with a head restraint (13), which head restraint (13) defines a head region (20) of an occupant arranged upstream thereof in a longitudinal direction (X), wherein the ventilation system (1) is designed to discharge an air flow (L) into an interior (30) of the vehicle,

it is characterized in that the preparation method is characterized in that,

at least one air outlet (8) arranged on the vehicle seat (10) on the side of the head restraint (13) is designed to discharge the air flow (L) at least partially into the head region (20), and a disinfection device (3) arranged upstream of the air outlet (8) is designed to remove pathogens from the air flow (L).

2. The ventilation system as set forth in claim 1,

it is characterized in that the preparation method is characterized in that,

in each case, at least one air outlet (8) is arranged on both sides and on one side of the head restraint (13).

3. The ventilation system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the vehicle seat (10) has a fan section (14) with a forwardly facing fan surface (15), which is arranged on the side of the head restraint (13) and above the backrest (12), and on which at least one air outlet (8) is arranged.

4. The ventilation system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the at least one air outlet (8) can be adjusted in order to change the direction and/or the volume flow of the discharged air flow (L).

5. The ventilation system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the ventilation system has a breathing mask (25) for the occupant, which breathing mask is attachable to at least one air outlet (8) by means of a connecting tube (27).

6. The ventilation system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the ventilation system is designed to generate the air flow (L) at least partly by removing air from the interior (30).

7. The ventilation system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the vehicle seat (10) has the disinfection device (3).

8. The ventilation system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the disinfection device (3) has a filter device (4), the filter device (4) being designed to remove pathogens from the air flow (L) by filtration.

9. The ventilation system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the disinfection device (3) has a neutralization device (5) designed to neutralize pathogens.

10. The ventilation system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the ventilation system has a humidifier (7), the humidifier (7) being designed to increase the moisture content of the air stream (L) upstream of the at least one air outlet (8).