DE202020103935U1 - Breathing air dispenser with an air purifier to provide pathogen inactivated air - Google Patents

Abstract

Breathing air dispenser (100) with an air purifier comprising at least one air delivery unit (3), a germ inactivator (1) with at least one UV radiation source (5) and at least one air outlet (7) for the directed delivery of a purified air flow towards the head of at least one user.

Description

The present invention relates to a breathing air dispenser with an air cleaner according to the preamble of claim 1 and an arrangement with an air cleaner according to the preamble of claim 11.

Various personal protection devices are known from the prior art, which implement separate guidance for a supply and a discharge of air. Such personal protection devices offer protection against substances, particles or organisms that can get into the body via the respiratory tract and the eyes. In general, this requires wearing a sealing face mask.

Fire service breathing apparatus, so-called compressed air breathing apparatus, e.g. B. have a face mask in which the air is supplied from a compressed air cylinder and the breathing air is discharged directly from the face mask via a check valve. Such compressed air breathing apparatus are independent of the ambient air, but require an air reservoir that the wearer carries with him. Compressed air cylinders are typically used for this purpose, due to which the breathing apparatus typically weighs between 10 kg and 15 kg. Due to the limited storage capacity of these compressed air cylinders, wearing times of approx. 30-60 minutes are achieved. Here, too, it is necessary to wear a sealing face mask.

Both the weight, the wearing of the mask and the short period of use are felt to be disadvantageous.

In the laboratory area, sealed overpressure suits are used which are connected to a central clean air supply via an air supply line, e.g. a hose. The use of overpressure suits therefore requires a great deal of installation effort for the necessary infrastructure, in particular the clean air supply, and prevents the suits from being used on the move.

Overpressure suits are also known for mobile use. Here, portable pumps are used that draw in filtered outside air and thus generate overpressure in the suits. The problem with this is the limited operating time of the particle filters used here and the fact that Covid19 viruses are around 10 times smaller than the pore size of FFP3 filters.

There are also various other particle-filtering masks for mobile use, which are designed either for multiple use with exchangeable filters or as single-use masks. Another problem with these masks is the limited useful life of the filters, which either leads to frequent filter changes or to frequent changes of the disposable masks.

Furthermore, the filters currently on the market for the masks used, with a pore size of 0.6 µm, are not fine enough for some viruses and therefore do not offer adequate protection. For example, the SARS-CoV-2 coronavirus, which has been known since the end of 2019, has a diameter of 60-140 nm (0.06-0.14 µm) and is therefore insufficient with the FFP2 and FFP3 masks available on the market filtered from the breath.

In situations in which there is an increased risk of infection, e.g. B. In epidemics or pandemics with dangerous pathogens, a shortage of appropriate filters is also to be feared.

All of the aforementioned devices have in common that they are not suitable for everyday use outside areas with an acute threat, because there, for example, a high number of infected people is to be expected.

There is therefore a need for devices and arrangements which offer increased protection against infection in everyday situations, but which are significantly more comfortable for the person to be protected and do not interfere with everyday interaction with other people.

In the prior art, there are air cleaners for this purpose, which suck in air from a room, clean it from particles and germs with filters or in some other way, and return the cleaned air to the room. In principle, such air purifiers are designed to reduce the amount of particles and germs in the room air by diluting it with purified air after a long period of operation. What these devices have in common is that the load of infectious particles in the room air is only significantly reduced after a very long treatment time. If a room has 60m ³ and is treated with a device with a throughput of 30m ³ / h and if infectious aerosol is only released at the beginning of the treatment, then this aerosol-containing air (with an assumed degree of inactivation of 100%) after 1 hour to 50% decontaminated, after 2h 75%, after 3h 87.5% and so on. A relevant value of 99% is only reached after 7 hours of treatment. The following table shows the achievable decontamination (inactivation of the germs) relative to the initial concentration: decontamination time % H 0.00 0 50.00 1 75.00 2 87.50 3 93.75 4th 96.88 5 98.44 6th 99.22 7th

Such a device is therefore completely unsuitable for immediate risk reduction.

If a discharge opening of such a device is arranged, for example, near a row of chairs in a waiting room, so that an infected person sitting close to the opening can release viruses into the air, these are transported further by the air flow and, for example, transported to a person sitting next to them so that, despite any distance requirements that may apply, this airflow, which is directly contaminated with viruses, is subject to a greater risk of infection than if a corresponding device were not available.

It is the aim of the present invention to provide adequate security against infectious aerosols for people in rooms which also include, for example, the consumption of beverages or food and social interaction, whereby the wearing of masks can be dispensed with. It is therefore the object of the present invention to provide an air purifier which minimizes the risk of infection. If people are sufficiently safe in rooms, it should be possible to consume drinks or food, despite the fact that masks are not used. The individual protection with a device also includes a person in order to protect them against any infectious aerosols from other people.

This object is achieved by a breathing air dispenser with an air cleaner with the features of claim 1 and an arrangement with an air cleaner relative to a seated position of a user according to claim 11. Advantageous developments are the subject of dependent claims.

A respiratory air dispenser according to the invention with an air cleaner comprises at least one air delivery unit, a germ inactivator with at least one UV radiation source and at least one air outlet for the directed delivery of a purified air stream in the direction of a head of at least one user.

It is crucial for the present invention that the breathing air dispenser with air purifier emits a directed air flow, for example directed towards the head area of the respective user. E.g. can be provided in one embodiment that several users are simultaneously supplied with germ-inactivated air. In particular, it can be advantageous if the air cleaner is designed in such a way that the directed air flow can be directed towards a head area of the user.

In this way, the risk of infection can be minimized, even though people who could give off partially infectious aerosols are together in one room, for example at a table or counter. A mere distance regulation for people within a room is not enough to sufficiently reduce the risk of infection for infectious aerosols. An aerosol can lead to infection even over distances of more than 6m. This risk is minimized by using a breathing air dispenser according to the invention with an air cleaner according to the present application.

By using a germ inactivator, an air flow can be generated which still contains the germs sucked in, but these are inactivated. Inactivation means that viruses are no longer able to replicate in host cells.

A source of UV radiation causes RNA or DNA damage in the genome of viruses so that they are no longer able to reproduce. In this way, the viruses can be inactivated and thus rendered harmless without being mechanically blocked by a filter.

In addition, the air cleaner can also have one or more mechanical and / or chemical filters. E.g. so-called HEPA filters can be used to separate suspended matter such as Viruses, germs, toxic dusts, aerosols or activated carbon filters can be used to remove unpleasant odors. Such consumption filters, that is to say filters with a limited duration of action, have the disadvantage that the air cleaner therefore requires more frequent maintenance, which can be undesirable depending on the application.

In the present application, germs are understood to mean pathogens, that is to say in particular viruses, spores and bacteria. An alternative term for this is pathogen.

The air delivery unit can be designed, for example, as a fan, in particular an axial fan or radial fan. Such fans are available for different volume flows and required overpressures and can therefore be used inexpensively. Furthermore, such fans are also suitable for quiet applications Environments available. It is preferred to use fans which, for the purpose at hand, preferably do not exceed a noise level of less than 18 to 20 dBA.

The germ inactivator has a UV radiation source in the feed that is suitably designed and dimensioned so that, based on SARS-CoV-1 viruses, at least 3 log levels are inactivated in the air of the feed. A log ₁₀ level, or a log level for short, is a unit of measurement for a germ reduction by a power of ten: a log ₁₀ level reduces the amount of germs present by 90%; from the original population 100 have only 10 survived. With a reduction of 4 log levels, 99.99% of the originally present germs are killed or inactivated.

Several UV radiation sources can also be used to achieve sufficient irradiation of the air flowing past. These can be arranged in series or in parallel, depending on the spatial ambient and flow conditions.

Particularly good results are achieved when the UV radiation source emits light in the UVC range, in particular in the upper UVC range, that is to say in the present case at a wavelength between 240 nm and 280 nm, preferably between 250 nm and 260 nm. Currently, mainly UV radiation sources which emit at a wavelength of 253 nm are commercially available, but UV radiation sources with a wavelength of 260 nm are also increasingly available and can also be used. The absorption maximum of for RNA is at 260 nm, so that particularly good results can be expected here. Wavelengths below 220 nm have proven to be unsuitable as they lead to an increased generation of ozone in the irradiated air. Wavelengths above 295 nm are too low in energy to cause sufficient DNA and RNA damage.

UV radiation sources in the UVB range, i.e. H. at wavelengths between 280 nm and 350 nm, but here preferably 295 nm, can be used and achieve good results.

Tests by the applicant have shown that in the case of UVC radiation with a wavelength of 253 nm, an inactivation of a power of ten (one log level) SARS-CoV-1 viruses, for example at an irradiation power of 3.9 +/- 0.6 mJ / cm ² he follows. In order to achieve an inactivation of 4 log levels based on SARS-CoV-1 viruses, an irradiation output of at least between 13.2 mJ / cm ² and 18.0 mJ / cm ^{2 would be} necessary. This intensity can, however, be achieved through further technical measures with less UVC input, so that lower UVC intensities are also sufficient for adequate inactivation.

Tests have also yielded corresponding results for UVB radiation with a wavelength of 275-295 nm. Inactivation of one log level of SARS-CoV-1 viruses could be achieved here at an intensity of 18 +/- 3 mJ / cm ² .

Since UVC radiation sources currently have better commercial availability and consume less energy, they are preferred.

In order to achieve an optimized irradiation of the air flowing past the UV radiation source, the UV radiation source is elongated, preferably designed essentially circular-cylindrical with homogeneous radiation characteristics.

In the present case, elongated means that a length of the UV radiation source is at least three times, preferably at least five times, a diameter of the radiation source.

A homogeneous radiation characteristic ensures that the air flowing past is uniformly irradiated at all points of the UV radiation source. This avoids the creation of flow paths on which a reduced irradiation and thus inactivation takes place.

The inside of the germ inactivator used preferably has the shape of a cylinder. In order to increase the efficiency of the irradiation, the cylinder can be designed to reflect UV radiation on the inside. The inactivation performance of the germ inactivator is significantly increased by the reflection of the UV radiation, so that the efficiency of the arrangement is significantly improved. With an inner surface of the cylinder that reflects UV radiation, the air flowing through the cylinder can be exposed to a higher UV dose rate in the germ inactivator while the lamp remains the same, which the reflected radiation components act in addition to the direct radiation of the UV lamp.

The inner surface of the germ inactivator can for this purpose consist of polished or high-gloss anodized aluminum, for example. For this purpose, the cylinder can either be made entirely of aluminum and polished or bright anodized, or a carrier made of another material, for example a plastic or another metal, can be used and coated with aluminum or another UV-reflective material.

The coating can be produced, for example, by vapor deposition, sputtering or gluing with a corresponding film.

The air is therefore preferably supplied through a cylinder, preferably in the form of a cylinder with a base area of an odd-numbered polygon. In the cylinder, the UV radiation source can preferably be arranged along an axis of symmetry, preferably not at the edge.

By guiding the supply air in a cylinder in which the UV radiation source is arranged, it can be ensured that the radiation acts on the air flowing past over a defined distance, so that a sufficient radiation dose is achieved on the germs transported in the air. With a UV radiation source arranged along the symmetry axis of the pipe, which emits UV radiation homogeneously over 360 ° over its entire length, particularly effective irradiation of the inflowing air and the germs contained therein can be achieved.

A compact radiation source in U-shape can also fulfill this task. In addition, one-sided or two-sided socketed, or even several fluorescent tubes, which emit sufficient radiation in the desired wavelength range.

Such fluorescent tubes can have almost any shape. However, elongated tubes, often with an electrical connection on both sides, U-shaped compact lights with an electrical connection on one side, or light bodies in a spiral shape are typical. However, this list is not intended to exclude other shapes of the luminous element, in particular individually adapted shapes or other commercial shapes.

The radiation source, preferably a discharge lamp, can be surrounded by an additional envelope that is transparent to UV radiation, and thus, for example, protected from mechanical effects. The envelope can have a filter or be designed as a filter. The filter can be permeable to certain wavelengths and thus improve the light spectrum of the radiation source.

The base of the cylinder is preferably designed as an odd polygon, preferably with 5, 7 or 9 corners. Polygons with, for example, 11 or 13 corners can also be used. The fact that the cylinder has an odd-numbered polygon as the base area, in particular in the case of regular polygons, ensures that this does not have any parallel sides and thus the cylinder does not have any parallel lateral surface sections. This prevents radiation from being reflected back and forth directly between parallel surfaces. Furthermore, the corners where the side surfaces meet are better illuminated. In addition, the radiation is not only focused back to the center, as would be the case with a round reflector. A more homogeneous distribution of radiation is achieved with a polygonal reflector.

In a development, the sides of the base area of the germ inactivator can be concave in at least sections and / or have concave projections. With such a configuration, the light emitted by the UV light source, which is preferably arranged centrally along an axis of symmetry of the cylinder, is deflected and scattered so that it is not directly reflected back onto the light source. In this way, an improved distribution of the emitted UV radiation can be achieved, so that homogeneous irradiation of the entire volume of the cylinder is ensured.

It should be noted at this point that a concave configuration of the sides of the base area or concave projections mean that the sides are bent inwards from linearly extending sides or have projections pointing inwards.

In order to counteract an undesired formation of ozone, a catalyst element can be arranged behind the irradiation unit in the direction of flow. The catalytic converter element can be designed as a separate component and / or catalytic coating of the surfaces of a turbulence damper to generate a uniform air flow. The catalyst element, i.e. H. the coating or the separate component can be designed as an interchangeable insert and can contain metal oxides, for example of manganese or copper or also activated carbon, as a catalyst.

It is advantageous if the cylinder in which the UV radiation source is arranged has a ratio of length to base area of between 8 to 1 and 1 to 1, preferably between 6 to 1 and 2 to 1, more preferably of 4 to 1.

With a corresponding ratio of length to diameter, sufficient irradiation of the germs contained in the air flowing through the cylinder is achieved.

In one embodiment, the breathing air dispenser with air cleaner can be designed to be suitable for ceiling mounting at one end and preferably have a light source for room lighting at the other end. In this way, a pendant luminaire with the simultaneous function of a germ-inactivating air purifier can be created. One designed in this way Embodiment of the breathing air dispenser can be arranged particularly inconspicuously in various everyday rooms.

Such pendant lights with an integrated breathing air dispenser can be used, for example, in cafes or restaurants and thereby reduce the risk of the guests at a table of mutual infection with diseases transmitted via droplets or aerosols. Here, through a circumferential slot-shaped nozzle, the purified air is offered over 360 °, directed at the level of the faces. For a counter application, it is sufficient to blast in the direction in front of and behind the counter. If, as in the Corona pandemic 2020, there are additional distance requirements and there is therefore an additional distance between two tables, the risk of infection for other guests is not increased, but a dilution effect is achieved that also reduces the risk of infection for other guests.

Since the vector of the breathing air offered is emitted from the middle of the air cleaner in the direction of the people sitting around it, this also has the consequence that any secretion of an infectious aerosol from one seat neighbor is moved away from other seat neighbors, so that there is a clear risk of infection among seat neighbors is decreased. This aerosol is diluted as the distance increases, and the same installation is expediently attached to neighboring tables at a distance of at least 1 m.

In an alternative variant, the breathing air dispenser with air cleaner is designed as a floor-standing device, preferably as a table-top device. In situations in which ceiling installation is not possible or not desired, as well as in applications in which mobility of the breathing air dispenser is desired, it can preferably be designed as a floor-standing device. Such a free-standing device can, for example, be designed as a table-top device that can be used particularly well in single-user situations. E.g. Such a device can be used in a doctor's office so that the doctor is always supplied with a stream of purified air when talking to the patient. A table-top device with two nozzles at an angle of 90-180 degrees is also conceivable, in order to enable two people to work at a table opposite each other. In the case of workplaces where a person is standing (e.g. sales), the device according to the invention can also be designed as a standing device, with the purified air being released above the head in the direction of the face.

A free-standing device can also be used for multi-person applications.

In a preferred embodiment, the air cleaner of the breathing air dispenser has at least 2, preferably 4 or more person-related air outlets. In this way, several people can be supplied with germ-inactivated air at the same time. The several air outlets can also be connected to one another and, for example, form a circumferential slot for a 360 ° discharge of germ-inactivated air.

Regardless of the number of air outlets or the number of people who are to be supplied with air from the air cleaner, the air delivery unit preferably delivers a volume flow of at least 5 m ³ / h to 200 m ³ / h, more preferably 10 m ³ / h up to 60 m ³ / h, even more preferably 15 m ³ / h to 30 m ³ / h per air outlet or per person. A device with circular radiation, for example over an angle of 360 °, should therefore emit between 20 m ³ / h and 300 m ³ / h, preferably 30-180 m ³ / h. An air flow of this order of magnitude is usually not perceived as disturbing, but it causes a sufficient exchange of air in the area of the face and thus of the mouth and nose, so that a high level of acceptance of the air purifier can be expected.

Furthermore, it can be provided that the volume flow is increased individually to increase z. B. to achieve a cooling effect. However, it is crucial that the volume flow cannot be reduced below the limit of 5 m ³ , so that the positive effect of the air exchange is maintained.

What the outlet nozzles have in common is that the air is focused as well as possible and directed towards the faces, even over the greatest possible distance. This is made possible, among other things, with the help of guide surfaces, air flow parallelizers and adjustable nozzles.

In this context, care must also be taken that the dose of UV radiation in the germ inactivator per air particle does not fall below a value of 6 mJ / cm ² , more preferably 10 mJ / cm ² , based on the zone within the germ inactivator with the lowest Radiation intensity (e.g. outer surface) decreases. The dose depends on the duration of the irradiation, so the speed of the air in the zone mentioned must not exceed a corresponding value. The spatial delimitation of the germ inactivator is defined here as the zone within which radiation is emitted and reflected after a distance through which the air to be inactivated is passed. In the longitudinal version, the path of the zone where the radiation begins (air inlet) begins roughly at the point of radiation emission through the surface of a radiation-emitting component (e.g. at the level of an incandescent filament of an Hg discharge lamp) and extends to the last point at the exit a radiation emission through the surface of a Radiation-emitting component in such a way that the radiation leads transversely to the air flow.

A particularly good result of the inactivation is achieved if a base area of the cylinder and the UV radiation source are matched to one another in such a way that an intensity of at least 10 mW / cm ^{2 is} calculated on the inside of the cylinder through which the air is passed the addition of direct radiation components and reflected radiation components from the opposite direction is achieved. The area dimension cm ² refers to any point within a cross section of an imaginary column between the radiation emission location and the reflective wall through which the air moves. A reflection on the inside of the tube increases the efficiency of the irradiation. Despite the relatively low intensity of the radiation source, as a result of multiple reflections of this radiation, a sufficient radiation dose is provided for each air particle in order to achieve sufficient inactivation of SARS-CoV-1 viruses. For coronaviruses, the required dose in the radiation range 250-268 nm is 3-4 mJ / cm ² per log level, i.e. 10-15 mJ / cm ² for inactivation by 3 log levels (99.9%). These values relate to measurements in liquid; as an aerosol, these values should even be slightly lower, since reflection and absorption losses through the liquid are eliminated. The radiation doses required to inactivate other aerosol-forming viruses that are pathogenic to humans, such as influenza or Ebola, are also in a comparable range.

In order to achieve a sufficient reduction in the risk of infection, the volume flow and the germ inactivator are preferably coordinated with one another in such a way that at least 3 log levels are inactivated in relation to SARS-CoV-1 viruses.

An arrangement according to the invention of a breathing air dispenser with an air purifier according to the above description and a seat for at least one person is characterized in that the at least one air outlet is oriented towards the seat in such a way that the air flow around a person of average size sitting there Face from the front.

An arrangement with a breathing air dispenser with an air cleaner relative to a seated position of a user ensures that purified breathing air is supplied to one or more people in the direction of the face at a distance of less than 2 m. This enables people to maintain social contact with one another without a mask and, for example, that guest rooms can be opened to the public despite pandemic-like situations. Since this type of technological invention is essentially only effective in a narrow spatial area, a mask should be worn in the room on the way there. Since a temporal component of the length of a stay in a room also plays a role in the risk of infection, this is taken into account by z. B. a guest most of the time e.g. B. spends at his table and is protected there by the invention.

The average size of people can vary from country to country and from use case to use case. If the air flow cannot be adjusted, a person with a height of 150-200 cm should be used in Germany. The air flow is to be dimensioned at a distance of approx. 30-200 cm from the air outlet so that people of the desired target group, e.g. the average size, are hit in the face by the air flow.

Deviations in the body size of the people can be compensated for by adjusting a cross-sectional area of the air flow in the middle above the seat. Typically, the air flow should have a cross-sectional area between 100 cm ² and 4000 cm ² in the middle above the seat.

In one application, such as is possible in cafes and restaurants, the seat is equipped with a table, the breathing air dispenser with air purifier can be ceiling-mounted and the at least one air outlet is between 40 cm and 150 cm above a table top. In such a configuration, it can be achieved that people sitting opposite one another at the table can look at one another and the air cleaner is not perceived as a nuisance between people at a table.

A distance between the air outlet and people's faces is ideally between 30 cm and 200 cm, more preferably between 50 cm and 130 cm.

The UV radiation source can be designed as a mercury discharge lamp or LED light source. The efficiency of mercury discharge lamps for generating UVC is currently significantly better than that of LED lamps. However, this can change as a result of further developments, so that LED light sources would then be preferred. Furthermore, there may be uses of the personal protection apparatus in which the reduced efficiency of the LED lamps in favor of being free of mercury can or must be accepted.

• 1 ein erstes Ausführungsbeispiel eines Atemluftspenders mit Luftreiniger gemäß der vorliegenden Anmeldung als Pendelleuchte,
• 2 ein zweites Ausführungsbeispiel eines Atemluftspenders mit Luftreiniger gemäß der vorliegenden Anmeldung als Deckenleuchte,
• 3 ein drittes Ausführungsbeispiel eines Atemluftspenders mit Luftreiniger gemäß der vorliegenden Anmeldung als Tischgerät,
• 4 ein viertes Ausführungsbeispiel eines Atemluftspenders mit Luftreiniger gemäß der vorliegenden Anmeldung als Pendelleuchte für einen Konferenztisch und
• 5 ein Ausführungsbeispiel einer Anordnung eines Atemluftspenders mit Luftreiniger, wie er in 1 dargestellt ist, in Bezug auf einen Sitzplatz.

The present invention is explained in detail below on the basis of exemplary embodiments with reference to the accompanying figures. Show it:

• 1 a first embodiment of a breathing air dispenser with air cleaner according to the present application as a pendant light,
• 2 a second embodiment of a breathing air dispenser with air cleaner according to the present application as a ceiling light,
• 3 a third embodiment of a breathing air dispenser with air cleaner according to the present application as a tabletop device,
• 4th a fourth embodiment of a breathing air dispenser with air cleaner according to the present application as a pendant lamp for a conference table and
• 5 an embodiment of an arrangement of a breathing air dispenser with an air cleaner, as shown in 1 is shown in relation to a seat.

In the figures, unless otherwise stated, the same reference symbols designate the same or corresponding components with the same function.

1 shows a first embodiment of a breathing air dispenser 100 with an air cleaner according to the present application in a version as a pendant lamp.

The in 1 shown breathing air dispenser 100 has a substantially hollow-cylindrical germ inactivator 1 on, the germ inactivator 1 a housing 2 has a straight circular cylinder with an outer contour. In the case 2 that inside through a into the housing 2 introduced insert the shape of a straight cylinder with a base G having a regular triangle is a UV radiation source centrally along a longitudinal axis A 5 arranged in the form of a U-shaped bent fluorescent tube.

In the present view, the housing faces on top 2 an air inlet 9 as well as an aperture 6th on that prevents UV radiation from the UV radiation source 5 out of the case 2 penetrates outside. It is also on the top of the housing 2 a suspension 15th arranged, by means of which the pendant lamp can be attached to a ceiling or other supporting structure. There is also a connection cable on the top 13 provided, by means of which the pendant luminaire a voltage supply - typically the prevailing household network - can be locked for energy supply.

The base of the UV radiation source is in a control electronics 4th inserted socket and thus electrically contacted. The UV radiation source 5 can easily be exchanged in this way and replaced by a spare part in the event of a defect.

The control electronics 4th not only regulates the activation of the UV radiation source 5 but also the control of a below the control electronics seen in the axial direction 4th arranged air delivery unit 3 , which is designed here as an axial fan. Through the axial fan 3 becomes one in the in 1 illustrated embodiment, air flow from the air inlet shown by arrows 9 to an air outlet 7th causes. The air flow sucks in room air at the top, at the UV radiation agent 5 passed and through the air outlet 7th ejected again. The air outlet 7th is in the present embodiment as a circular gap in the housing 2 of the breathing air dispenser 100 formed so that the air outlet, viewed in the axial direction, takes place in an angular range of 360 °. The end is in the housing 2 a lamp 17th arranged that to illuminate one in the axial direction A in front of the breathing air dispenser 100 lying area is formed. With the light source 17th it can be, for example, an LED light source or other suitable light source.

The one in the case 2 The insert is arranged on the inside with a surface that reflects UV radiation 11 provided, so that a radiation power that is applied by the germ inactivator 1 guided air acts, is maximized. In this way it can be achieved that germs contained in the sucked-in room air are inactivated and thus, even if they are inhaled, are not capable of replication, ie they are not capable of multiplying in humans. By a suitable design of one of the air delivery unit 3 transported volume flow Q , a length I of the germ inactivator 1 as well as a power of the UV radiation source 5 , can thus be achieved that at least 3 log levels of germs related to Sars-CoV-1 are inactivated. In this way it is achieved that for in the area of the air purifier 100 seated people a risk of infection due to an aerosol in the room air is significantly reduced due to the inactivation of the germs contained Furthermore, the fact that from the air outlet 7th a directed airflow towards a face in the area of the breathing air dispenser 100 seated people also dilutes or even prevents an air flow directed directly from person to person, achieves that the risk of infection that thereby exists is significantly reduced.

2 shows a second embodiment of a breathing air dispenser 100 with an air cleaner according to the present application, wherein the in 2 shown breathing air dispenser 100 is designed as a ceiling lamp or ceiling-mountable device.

In the in 2 illustrated embodiment are in the housing 2 of the germ inactivator 1 two UV radiation sources 5 arranged, which in the present embodiment are arranged pointing in diametrically opposite directions and rocked centrally. In the present exemplary embodiment, it is also central at a 90 ° angle to the UV radiation sources 5 the air in front of the unit 3 with an air outlet oriented downwards 7th arranged. Through the air delivery unit, which is again designed as a fan 3 is thus laterally through two horizontally diametrically opposed air inlets 9 Room air is sucked in and conically down through the air outlet 7th pushed out.

The germ inactivator is also in the present exemplary embodiment 1 inside with a surface that reflects UV radiation 11 Mistake.

The surface that reflects UV radiation 11 can for example be made of polished or high-gloss anodized aluminum.

The in 2 shown breathing air dispenser 100 can with a plurality of lighting means, for example two or four, on both sides of the germ inactivator 1 can be arranged or with an air outlet 7th surrounding LED panel.

3 shows a third embodiment of a breathing air dispenser 100 with an air cleaner that is designed as a tabletop device.

This in 3 The table device shown is essentially L-shaped in the longitudinal section shown here and has a stand on the underside for placing the device on a table and opposite, on the top side, an air inlet 9 on. In a vertical orientation is in the housing 2 of the air purifier 100 the UV radiation source 5 arranged, wherein at the free end of the horizontal leg of the L-shaped housing an air conveyor unit 3 in the form of a fan or fan at the air outlet 7th is arranged. The air conveyor unit 3 is aligned in such a way that an air flow guided through the device emerges from the device at an angle of about 30 ° relative to the surface it is standing on. Thus, a person sitting at an appropriate distance is supplied with purified and germ-inactivated air in the area of their face.

4th shows a fourth embodiment of a breathing air dispenser 100 with an air cleaner according to the present application, wherein the embodiment according to 4th is designed as a pendant lamp for a conference table.

The in 4th shown breathing air dispenser 100 is about a suspension 15th can be suspended from a ceiling and has inside the housing 2 a horizontally aligned UV radiation source 5 on. Due to the 90 ° angle to the UV radiation source 5 arranged air delivery unit 3 becomes a downward flow of air through the air outlet 7th causes. Room air is sucked in from the side so that air flows along the UV radiation source 5 is effected. The germ inactivator is also in this case 1 inside with a surface that reflects UV radiation 11 provided so that a radiation power acting on the air flowing past is maximized.

5 shows an embodiment of an arrangement of a breathing air dispenser 100 with an air purifier like the one in 1 is shown in relation to a seat, for example in a restaurant or café.

The breathing air dispenser 100 according to 1 is arranged in the arrangement shown centrally above a table for a maximum of four people and is arranged and designed relative to the table and seats arranged around the table so that the through the air outlet 7th outflowing air stream hits people of average size sitting at the table in the area of their face, especially in the area of the mouth and nose. In this way it can be achieved that the people sitting at the table are blown on in a directed manner with germ-inactivated air, whereby a risk of infection with germs in the room air, in particular through aerosols, is significantly reduced.

List of reference symbols

1

Germ inactivator

2

casing

3

Air delivery unit / fan

4th

Control electronics

5

UV radiation source

6th

cover

7th

Air outlet

9

Air inlet

10

Baffle

11

reflective surface

13

Connection cable

15th

suspension

17th

Bulbs

100

Breathing air dispenser

Q

Volume flow

G

Floor space

Claims (14)

Breathing air dispenser (100) with an air cleaner comprising at least one air delivery unit (3), a germ inactivator (1) with at least one UV radiation source (5) and at least one air outlet (7) for the directed delivery of a purified air flow towards the head of at least one user. Breathing air dispenser (100) according to Claim 1 , characterized in that the air delivery unit (3) is designed as a fan, in particular an axial fan or radial fan. Breathing air dispenser (100) according to one of the preceding claims, characterized in that the germ inactivator (1) on the inside has the shape of a, preferably straight, cylinder with a base (G) and has a surface (11) reflecting UV radiation on the inside. Breathing air dispenser (100) according to Claim 3 , characterized in that the surface consists of polished or high-gloss anodized aluminum. Breathing air dispenser (100) according to one of the Claims 3 or 4th , characterized in that the base (G) of the cylinder is an odd-numbered polygon, preferably with 5, 7 or 9 corners. Breathing air dispenser (100) according to one of the Claims 3 to 5 , characterized in that sides of the base (G) of the germ inactivator (1) are concave at least in sections and / or have concave projections. Breathing air dispenser (100) according to one of the preceding claims, characterized in that the air cleaner (100) is designed to be suitable for ceiling mounting on one end and has a light source (17) for room lighting on the other end. Breathing air dispenser (100) according to one of the Claims 1 to 6th , characterized in that the air cleaner (100) is designed as a floor-standing device, preferably as a table-top device. Breathing air dispenser (100) according to one of the preceding claims, characterized in that at least 2, preferably 4 or more personal air outlets, the air delivery unit (3) having a volume flow (Q) of 5 m ³ / h to 300 m ³ / h per air outlet (7 ) promotes. Breathing air dispenser (100) according to one of the preceding claims, characterized in that the volume flow (Q) and the germ inactivator (1), in particular an acting radiation in the range 250-270 nm, are coordinated with one another in such a way that based on SARS-CoV-1 Viruses are inactivated at least 3 log levels. Arrangement of a breathing air dispenser (100) with an air purifier according to one of the preceding claims and a seat for at least one person, characterized in that the at least one air outlet (7) is oriented towards the seat in such a way that the air flow is an average size person sitting there Area of your face from the front. Arrangement according to Claim 11 , characterized in that the air flow to a face at a distance of 100 cm from the air outlet has a cross-sectional area between 100 cm ² and 4000 cm ² . Arrangement according to one of the Claims 11 or 12 , characterized in that the seat is equipped with a table, the breathing air dispenser (100) is designed to be ceiling-mountable and the at least one air outlet (7) is arranged between 40 cm and 150 cm above a table top. Arrangement according to one of the Claims 11 or 12 , characterized in that a distance between the air outlet (7) and faces of people is between 30 cm and 200 cm.

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