EP3967941A1 - Ventilation device and premise - Google Patents

Abstract

The invention relates to a ventilation device (1) for a room in a building, having an air duct (3) which has an air inlet opening (5) at one end and an air outlet opening (6) at the other end, and an air conveying device (4) for conveying one of the Air inlet opening (5) to the air outlet opening (6) through the air duct (3) guided air flow. It is provided that the ventilation device (1) has at least one radiation source (11) for providing ultraviolet radiation, the radiation source (11) being assigned to the air duct (3) in such a way that the ultraviolet radiation provided by the radiation source (11) enters an irradiation section (10) of the air duct (3) radiates.

Description

The invention relates to a ventilation device for a room in a building, with an air duct that has an air inlet opening at one end and an air outlet opening at the other end, and with an air conveying device for conveying an air flow guided from the air inlet opening to the air outlet opening through the air duct.

The invention also relates to a room with such a ventilation device.

Ventilation devices of the type mentioned are known from the prior art. For example, a recirculation device generally has an air duct which has an air inlet opening at one end and an air outlet opening at the other end. So that the ventilation device can fulfill its intended ventilation function, an air conveying device for conveying an air flow guided from the air inlet opening to the air outlet opening through the air duct is also usually provided. The air conveying device is thus designed to convey air from outside the device through the air inlet opening into the air duct and to convey air present in the air duct out of the device through the air outlet opening.

The object of the present invention is to create a ventilation device that can reduce the contamination of the air with pathogens such as viruses or bacteria in a room.

The object on which the invention is based is achieved by a ventilation device having the features of claim 1 . This has the advantage that pathogens contained in the air flow are inactivated when the air flow is guided through the air duct. According to the invention, it is provided that the ventilation device has at least one radiation source for providing ultraviolet radiation, the radiation source being assigned to the air duct in such a way that ultraviolet radiation provided by the radiation source enters an irradiation section of the air duct, in particular in a - with regard to the flow path through the Air duct - limited irradiation section of the air duct, radiates. It is known that high-energy radiation such as ultraviolet radiation can kill pathogens such as viruses or bacteria can inactivate if the radiation dose of the radiation exceeds a limit value specific for the respective pathogen. The ventilation device according to the invention makes use of this concept. At least some of the pathogens contained in the air flow are inactivated by the radiation source or by the emission of ultraviolet radiation into the irradiation section by means of the radiation source. As a result, people are less likely to become infected with airborne pathogens. The air conveying device is preferably arranged in the air duct. The air conveying device is designed as an induction device or as a fan. The air conveying device is particularly preferably designed as a cross-flow fan. The use of a tangential fan enables high volume flows with very favorable noise levels. The ventilation device is preferably designed as a recirculation device. The air inlet opening, the air outlet opening and the air conveying device are preferably designed in such a way that the ventilation device arranged in a room effects mixed ventilation in the room during operation. This uniformly reduces the exciter load in the room. In particular, the ventilation device is designed or can be used as a ceiling, floor or wall device. The preferably limited design of the irradiation section, viewed in the direction of flow of the air flow, means that the proportion of ultraviolet radiation that can penetrate through the inlet and/or the air outlet opening to the outside or into the room is reduced. For this purpose, the irradiation section preferably begins—seen in the flow direction—at a distance from the air inlet opening and ends at a distance from the air outlet opening. The distances are preferably selected in such a way that the proportion of ultraviolet radiation penetrating to the outside is minimal. The course of the air duct is particularly preferably designed in such a way that direct emission of ultraviolet radiation into the environment, ie a direct optical connection from the radiation source to the environment or to the room or the air inlet and air outlet opening, is prevented. In this case, direct irradiation of the airflow from the radiation source can preferably only take place within the irradiation section, with indirect irradiation of the airflow by reflection of the ultraviolet radiation on the duct walls of the air duct also being possible within the irradiation section and in sections of the air duct adjoining it. The delimitation of the irradiation section is preferably realized by one or more curvatures, curves and/or corners in the course of the air duct, which, for example, between the irradiation section and the air inlet opening and between the irradiation section and the air outlet opening, in each case allow a flow of ultraviolet radiation, but not with it form a transparent labyrinth. The irradiation section is preferably delimited by the course of the air duct in such a way that indirect ultraviolet radiation, i.e. ultraviolet radiation transmitted by reflection within the air duct, does not escape or hardly escapes from the air duct into the room or from the air inlet and/or air outlet opening. The air conveying device, which can preferably be controlled or regulated in terms of its performance, ensures that the air flow, in particular the air flow speed of the air flow, can be optimally adjusted in such a way that as many pathogens as possible are inactivated by the irradiation in the irradiation section.

According to a preferred embodiment, it is provided that the radiation source is designed as a UVC low-pressure lamp. A UVC lamp is to be understood as meaning a radiation source that provides ultraviolet radiation whose wavelength is in a wavelength range from 100 nm to 280 nm. Ultraviolet radiation in this wavelength range is particularly suitable for inactivating viruses such as influenza viruses or corona viruses with a high level of efficiency.

The radiation source is preferably arranged in the air duct in such a way that the air flow flows around the radiation source. The radiation source thus extends at least in sections through the air duct. In this respect, the radiation source is in direct contact with the air flow guided through the air duct during operation of the ventilation device or the air conveying device. This achieves a particularly high degree of efficiency with regard to the inactivation of the pathogens contained in the air flow. According to an alternative embodiment, the radiation source is arranged outside the air duct. In this case, a radiation guide device is then preferably provided, which guides the ultraviolet radiation provided by the radiation source into the irradiation section of the air duct. The radiation source is preferably rod-shaped or U-shaped.

According to a preferred embodiment, it is provided that the radiation source is rod-shaped. Due to the rod-shaped or elongated design of the radiation source, a uniform radiation intensity distribution is achieved within the irradiation section. This leads to an advantageous utilization of the light output for inactivating pathogens, which ultimately further increases the efficiency with regard to the inactivation of the pathogens contained in the air flow.

The radiation source is preferably arranged in such a way that a longitudinal central axis of the radiation source, which is in particular rod-shaped, is perpendicular to the longitudinal extension of the Irradiation section is aligned. The longitudinal central axis of the radiation source is to be understood as meaning the axis that runs parallel to the longitudinal extension of the radiation source and through the center of the radiation source. The longitudinal extension of the irradiation section corresponds to the direction of flow of the air flow guided from the air inlet opening to the air outlet opening through the air duct in the region of the irradiation section. The longitudinal center axis of the radiation source is aligned perpendicularly to the longitudinal extension and thus parallel to a cross-sectional area of the irradiation section. The arrangement of the radiation source described above achieves an optimal, symmetrical radiation intensity distribution along the entire cross-sectional area of the irradiation section. This also ultimately further increases the efficiency with regard to the inactivation of the pathogens contained in the air flow. In addition, the presence of the radiation source means that no turbulence, or only minor turbulence, is introduced into the air flow. Preferably, the irradiation section has a rectangular cross section. In this respect, the cross section is defined by a width and a height of the irradiation section. The radiation source is preferably arranged in such a way that the longitudinal center axis of the radiation source is aligned in the width direction of the irradiation section, the length of the radiation source then particularly preferably corresponding at least essentially to the width of the irradiation section.

According to a preferred embodiment, the ventilation device has at least one additional radiation source for providing ultraviolet radiation, with the additional radiation source being assigned to the air duct in such a way that ultraviolet radiation provided by the additional radiation source radiates into the irradiation section, in particular into the limited irradiation section. The provision of the further radiation source increases the total quantity of ultraviolet radiation provided and, in addition, a particularly optimal, symmetrical radiation intensity distribution is achieved. Features disclosed above with reference to the radiation source are preferably also implemented in the further radiation source. The radiation source and the further radiation source are particularly preferably arranged one behind the other in the direction of flow of the air flow in the irradiation section. The further radiation source is also particularly preferably designed in the form of a rod and is aligned or arranged, for example, parallel to the radiation source. Two radiation sources arranged parallel to one another are preferably connected to one another at their free ends or merge into one another in order to form the above-mentioned U-shaped radiation source. According to a further embodiment, the rod-shaped Radiation sources are each aligned transversely to the flow direction or longitudinal extent of the air duct in the irradiation section and transversely, in particular perpendicularly, to one another.

According to a preferred embodiment it is provided that at least one duct wall of the air duct in the irradiation section, preferably all duct walls of the air duct in the irradiation section, is/are designed to reflect ultraviolet radiation. The duct walls of the air duct in the irradiation section are the walls which delimit the air duct in the irradiation section and insofar define the cross-section of the irradiation section. If the irradiation section has a rectangular cross section, for example, then the air duct in the irradiation section has four duct walls accordingly. At least one duct wall of the air duct in the irradiation section is designed to reflect ultraviolet radiation and in this respect has a reflective effect. The efficiency with regard to the inactivation of the pathogens is further increased by the reflection effect. On the one hand, this is due to the fact that a particularly optimal, symmetrical radiation intensity distribution is achieved by the reflection effect. In addition, ultraviolet radiation hitting the duct wall is not lost or only slightly lost through absorption, but is still available for inactivating the pathogens after reflection on the duct wall. The at least one channel wall is preferably designed to reflect at least 65%, preferably at least 90%, of the ultraviolet radiation impinging on the one channel wall. In order to achieve the reflection effect, the channel wall is preferably coated with a material which reflects ultraviolet radiation or is made from a material which reflects ultraviolet radiation. The material that reflects ultraviolet radiation is preferably an aluminum material, particularly preferably anodized aluminum. If necessary, the duct wall is provided with a special coating which, for example, further increases the reflective effect of the duct wall and/or is advantageous for other properties of the duct wall, such as the corrosion resistance of the duct wall.

According to a preferred embodiment it is provided that the air duct between the irradiation section and the air inlet opening has a first light trap and/or that the air duct between the irradiation section and the air outlet opening has a second light trap. A light trap is a section of the air duct that blocks or at least reduces the propagation of ultraviolet radiation. In this respect, one Light trap has a blocking effect for ultraviolet radiation and in particular forms the above-mentioned labyrinth through which flow can take place but which cannot be penetrated by radiation. The first light trap is arranged between the irradiation section and the air inlet opening and as such blocks or reduces emission of ultraviolet radiation through the air inlet opening. The second light trap is arranged between the irradiation section and the air outlet opening and as such blocks or reduces emission of ultraviolet radiation through the air outlet opening. The provision of the first and/or the second light trap accordingly restricts the spread of the ultraviolet radiation to the irradiation section and people who are in the vicinity of the ventilation device are protected from high-energy ultraviolet radiation.

According to a preferred embodiment, it is provided that at least one duct wall of the air duct in the area of the first light trap and/or in the area of the second light trap, preferably all duct walls of the air duct in the area of the first light trap and/or in the area of the second light trap, is designed for this/ are capable of absorbing ultraviolet radiation. The blocking effect provided by the light traps is thus at least partially achieved or increased in that the light traps have an absorption function with regard to the ultraviolet radiation. The channel wall concerned preferably absorbs at least 50%, preferably at least 80%, particularly preferably 100% of the ultraviolet radiation impinging on the channel wall. The channel wall is preferably coated with a material that absorbs ultraviolet radiation in order to achieve the absorption function. More preferably an absorbent surface coating is used, for example a black colored surface coating. Alternatively, to achieve the absorption function, the channel wall is preferably made of an ultraviolet radiation absorbing material.

According to a preferred embodiment it is provided that the air duct has a first bend to form the first light trap and/or that the air duct has a second bend to form the second light trap. By providing the first bend, direct emission of ultraviolet radiation through the air inlet opening, ie emission without prior impact on a duct wall, is reliably prevented by simple design measures. Accordingly, the provision of the second bend prevents ultraviolet rays from being emitted directly through the air outlet opening. The first and/or the second bend is particularly preferably a bend of 180°.

By providing the first and/or the second bend, the air flow is deflected in the area of the first or the second light trap. The channel wall on the outside of the bend preferably has a longitudinal section in the shape of a circular arc in the area of the first light trap. This achieves a low-turbulence guidance of the air flow through the first light trap. The same preferably also applies to the channel wall on the outside of the bend in the area of the second light trap.

The air duct preferably has an air supply chamber between the air inlet opening and the first light trap. If the air flow flows through the air inlet opening into the air duct, the air flow first reaches the air supply chamber before it reaches the first light trap. By providing the air supply chamber, a uniform inflow of air into the first light trap or into the irradiation section is achieved. The air duct preferably has an air discharge chamber between the air outlet opening and the second light trap. If the air flow exits the second light trap, the air flow first reaches the air discharge chamber before the air flow reaches the air outlet opening. By providing the air discharge chamber, a uniform outflow of the air flow from the second light trap or from the irradiation section is achieved.

At least one duct wall of the air duct in the region of the air supply chamber is preferably designed to absorb ultraviolet radiation. This results in the advantages already mentioned in connection with the light traps. In order to achieve the absorption function, the channel wall is preferably coated with a material which absorbs ultraviolet radiation or is made of such a material. All channel walls of the air channel in the area of the air supply chamber are particularly preferably designed to absorb ultraviolet radiation.

At least one duct wall of the air duct in the region of the air discharge chamber is preferably designed to absorb ultraviolet radiation. This also results in the advantages already mentioned in connection with the light traps. In order to achieve the absorption function, the channel wall is preferably coated with a material which absorbs ultraviolet radiation or is made of such a material. All channel walls of the air channel in the area of the air discharge chamber are particularly preferably designed to absorb ultraviolet radiation.

The ventilation device preferably has at least one air guiding element which extends through the air duct in the region of the first light trap. An air guiding element is to be understood as meaning an element which is present in addition to the duct walls and protrudes into the air duct. The provision of the air guiding element improves the guidance of the air flow in the area of the first light trap such that a particularly uniform flow is obtained and pressure losses are minimized. In addition, the provision of the air guiding element increases the number of surfaces on which the ultraviolet radiation can impinge in the area of the first light trap. Accordingly, the blocking effect of the first light trap is optimized by the air guiding element. In this respect, the air guiding element, which extends through the air duct in the region of the first light trap, is part of the first light trap. The ventilation device particularly preferably has a plurality of air guiding elements which extend through the air duct in the region of the first light trap. The ventilation device preferably has at least one air guiding element which extends through the air duct in the region of the second light trap. This results in the advantages mentioned above with regard to the air guiding element, which extends through the air duct in the region of the first light trap. The ventilation device particularly preferably has a plurality of air guiding elements which extend through the air duct in the region of the second light trap. Preferably, the first light trap and the second light trap are mirror-symmetrical to one another.

At least one of the air guiding elements is preferably designed to absorb ultraviolet radiation. This further optimizes the blocking effect of the first light trap or the second light trap. In order to achieve the absorption function, the air guiding element is preferably coated with a material which absorbs ultraviolet radiation or is made from such a material.

According to a preferred embodiment, it is provided that at least one of the air guiding elements has a longitudinal section in the shape of a circular arc. Such a configuration of the air guiding element results in an air flow with a particularly uniform or laminar flow. Preferably, the air guide element having the longitudinal section in the shape of a circular arc is designed as a circular arc profile. As an alternative to this, the air guiding element having the longitudinal section in the form of a circular arc is preferably produced from a plurality of individual pieces such as, for example, straight pieces or polygons.

The ventilation device preferably has at least a first air guiding element with a longitudinal section in the shape of a circular arc and a second air guiding element with a longitudinal section in the shape of a circular arc Longitudinal section, wherein the radius of the circular arc shape of the first air guiding element is greater than the radius of the circular arc shape of the second air guiding element, wherein the bulges of the circular arc shapes of the air guiding elements point in the same direction, and wherein the second air guiding element is in a circle segment defined by the circular arc shape of the first air guiding element and is arranged spaced from the first air guiding element. As a result, a flow path is created between the first and the second air guiding element, which is particularly advantageous for a uniform flow of the air flow. In addition, ultraviolet radiation that enters the flow path between the first air-guiding element and the second air-guiding element is repeatedly thrown back from one of the air-guiding elements to the other of the air-guiding elements. This increases the blocking effect of the light trap, which includes the first air-guiding element and the second air-guiding element.

The first air guiding element and the second air guiding element are preferably arranged concentrically to one another. The concentric arrangement of the first air-guiding element and the second air-guiding element means that the flow path formed between the first and the second air-guiding element has a constant cross-section in the direction of flow. In the following, it is initially assumed that the first and the second air element are part of the first light trap. The concentric arrangement is particularly advantageous in terms of flow if the cross section of the irradiation section corresponds at least essentially to the cross section of the air supply chamber. However, if the first and the second air guiding element are part of the second light trap, there is a corresponding advantage in terms of flow technology if the cross section of the irradiation section corresponds at least essentially to the cross section of the air discharge chamber.

The first and the second air guiding element are preferably arranged eccentrically to one another. The eccentric arrangement means that the cross section of the flow path formed between the first and the second air guiding element changes in the direction of flow. The eccentric arrangement is particularly advantageous in terms of flow when the cross section of the irradiation section differs from the cross section of the air supply chamber or the cross section of the air discharge chamber. If, for example, the height of the irradiation section is greater than the height of the air supply chamber, the first and the second air guiding element as part of the first light trap are preferably arranged eccentrically to one another in such a way that the cross section of the flow path formed between the first and the second air guiding element increases in the direction of flow.

The air supply chamber, the irradiation section or the irradiation chamber and the air discharge chamber are preferably arranged parallel to one another in the flow direction. The chambers are thus next to one another and are fluidically connected to one another in such a way that air flow path sections running parallel to one another result through the chambers. As a result, the ventilation device is designed to be space-saving and compact and also allows the device to be easily handled overall. Optionally, the air supply chamber, the irradiation chamber and the air discharge chamber are of the same length in the direction of flow or are at least essentially of the same length, so that a compact and stable embodiment of the ventilation device is offered.

According to a preferred embodiment of the invention, the ventilation device is designed overall as a structural unit or as a structural module. The features described above are then integrated into this and can be handled together as one unit, which enables simple assembly and advantageous transport of the device, for example.

According to an alternative embodiment of the invention, the ventilation device is not designed as a structural unit but as a ventilation system made up of individual modules. Each of the individual modules implements, for example, a section of the air duct as has been described above in different embodiments. For example, the air supply chamber, the air discharge chamber, the irradiation chamber, the respective light trap and the conveying device are each formed by a separate individual module, which are connected or can be connected to one another directly or indirectly, i.e. with the aid of further fluidic and/or mechanical connections. This results in the advantage of a flexible configuration of the ventilation device to be installed in or on the room of a building. With this embodiment, the installer can decide on site, for example, how the individual modules should be arranged in relation to one another in order to achieve the best possible effect for the room. According to a further embodiment of the invention, at least two sections of the air duct, for example the air supply chamber and one light trap, or the irradiation chamber and both light traps, are preferably formed in a single module.

The room according to the invention with the features of claim 23 is characterized by at least one ventilation device as described above. This results in the advantages already mentioned in connection with the ventilation device for the room.

The ventilation device is preferably arranged as a recirculation device in the room in such a way that both the air inlet opening and the air outlet opening open into the room.

Figur 1

ein lufttechnisches Gerät in einer perspektivischen Darstellung,

Figur 2

eine weitere perspektivische Darstellung des lufttechnischen Gerätes,

Figur 3

eine Schnittdarstellung des lufttechnischen Gerätes,

Figur 4

eine Schnittdarstellung eines Abschnitts eines Luftkanals des lufttechnischen Gerätes und

Figur 5

eine Schnittdarstellung des Abschnitts gemäß einem weiteren Ausführungsbeispiel des lufttechnischen Gerätes.

Further advantages and preferred features and feature combinations result in particular from what has been described above and from the claims. The invention is explained in more detail below with reference to the drawings. to show

figure 1

a ventilation device in a perspective view,

figure 2

another perspective view of the ventilation device,

figure 3

a sectional view of the ventilation device,

figure 4

a sectional view of a section of an air duct of the ventilation device and

figure 5

a sectional view of the section according to a further embodiment of the ventilation device.

figure 1 shows an embodiment of an advantageous ventilation device 1 in a perspective view. The ventilation device 1 has a multi-part housing 2, the parts of the housing 2 being designed in such a way that they together define an air duct 3 which has an air inlet opening at one end and an air outlet opening at the other end. The ventilation device 1 also has an air conveying device 4 for conveying an air flow guided from the air inlet opening to the air outlet opening through the air duct 3 . In the present case, the air conveying device 4 is a tangential fan 4 arranged in the air duct 3.

figure 2 shows another perspective view of the ventilation device 1. As from figure 2 As can be seen, the air inlet opening 5 and the air outlet opening 6 are formed in an outlet plate 7 which is part of the multi-part housing 2 .

According to the in the figures 1 and 2 illustrated embodiment, the ventilation device 1 is designed to be installed as a recirculation device in a false ceiling of a room. If the ventilation device 1 is installed in the false ceiling, the outlet plate 7 closes flush with a false ceiling of the false ceiling, so that the air inlet opening 5 and the Air outlet opening 6 open into the room. During operation of the ventilation device 1 or the air conveying device 4 , room air is then sucked into the air duct 3 through the air inlet opening 5 . The sucked-in room air flows through the air duct 3 as an air flow and is finally blown out of the air duct 3 again through the air outlet opening 6 . The air inlet opening 5, the air outlet opening 6 and the air conveying device 4 are preferably designed in such a way that the ventilation device 1 effects mixed ventilation in the room during operation.

As an alternative to the one in the figures 1 and 2 In the exemplary embodiment shown, the ventilation device 1 is designed, for example, to be installed in an intermediate floor of a room. According to a further exemplary embodiment, the ventilation device 1 is designed to be arranged on a ceiling, a floor or a wall or side wall of a room in such a way that the ventilation device 1 is fluidically connected to the room and/or protrudes into the room. According to a further exemplary embodiment, the ventilation device 1 is designed to be installed in a room as a stand-alone device. The inlet and outlet openings are then designed or arranged differently in the aforementioned variants.

figure 3 shows a sectional view of the figures 1 and 2 illustrated ventilation device 1. The direction of flow of the air flow guided from the air inlet opening 5 to the air outlet opening 6 through the air duct 3 is shown by arrows 9 .

The air duct 3 has an irradiation section 10 or an irradiation chamber 10 . The irradiation section 10 is cuboid. The cuboid shape is defined by a length 1, a height h and an in figure 3 invisible width b, which is perpendicular to the height h and the length l. The air current flows in the irradiation section 10 in the length direction of the irradiation section 10. The cross section of the irradiation section 10 is defined by the height h and the width b.

A radiation source 11 for providing ultraviolet radiation is arranged in the irradiation section 10 in such a way that the air flow flows around the radiation source 11 when the ventilation device 1 is in operation. Accordingly, ultraviolet radiation provided by the radiation source 11 radiates into the irradiation section 10 . In the present case, the radiation source 11 is a UVC low-pressure lamp 11. During operation of the ventilation device 1, pathogens such as viruses or bacteria that are in the through the air flow guided in the air duct 3 are inactivated by the ultraviolet rays radiated into the irradiation section 10 . In this respect, the exposure to pathogens in the room air can be reduced by means of the ventilation device 1 .

The radiation source 11 is rod-shaped or elongate. The radiation source 11 is arranged in the irradiation section 10 such that the longitudinal center axis of the radiation source 11 is aligned in the width direction of the irradiation section 10 . In this respect, the longitudinal central axis of the radiation source 11 is aligned perpendicularly to the longitudinal direction of the irradiation section 10 , ie perpendicularly to the direction of flow 9 in the irradiation section 10 , and perpendicularly to the height direction of the irradiation section 10 . In the present case, the longitudinal extent of the radiation source 11 corresponds at least essentially to the width b of the irradiation section 10. In this respect, the radiation source 11 radiates ultraviolet radiation over the entire width b of the irradiation section 10 into the irradiation section 10. The radiation source 11 is arranged centrally in the irradiation section 10 in relation to the height h of the irradiation section 10 . The configuration and arrangement of the radiation source 11 described above achieves an optimal, symmetrical radiation intensity distribution of the ultraviolet radiation in the irradiation section 10 that is advantageous for the inactivation of pathogens.

The ventilation device 1 also has an optionally available further radiation source 11A for providing ultraviolet radiation. The further radiation source 11A is also arranged in the air duct 3 or the irradiation section 10 in such a way that the further radiation source 11A is surrounded by the air flow when the ventilation device 1 is in operation. Thus, ultraviolet radiation provided by the further radiation source 11A also radiates into the irradiation section 10 . The provision of the further radiation source 11A increases the efficiency with which pathogens present in the air flow are inactivated. The additional radiation source 11A is also rod-shaped or elongate, and the longitudinal center axis of the additional radiation source 11A is aligned in the width direction of the irradiation section 10 . In this case, the further radiation source 11A is also arranged centrally in the irradiation section 10 in relation to the height h of the irradiation section 10 . In the present case, the further radiation source 11A is arranged downstream of the radiation source 11 in relation to the direction of flow 9 . According to further exemplary embodiments, other arrangements of the radiation sources 11 and 11A are provided in relation to the height h of the irradiation section 10 and its length.

For example, the radiation sources 11, 11A are arranged vertically one below the other, that is to say at the same height as seen in the direction of flow 9. The distance of one of the radiation sources 11 or 11A from the channel wall 12 is then preferably a quarter of the height h of the irradiation section 10 and the distance of the other radiation source 11A or 11 from the channel forest 13 is a quarter of the height h of the irradiation section 10. According to a further exemplary embodiment the further radiation source 11A is dispensed with, so that only the radiation source 11 is present as a radiation source.

The irradiation section 10 is delimited by several channel walls. are in figure 3 only the channel walls 12 and 13 delimiting the irradiation section 10 in the height direction can be seen, but not the channel walls delimiting the irradiation section 10 in the width direction. At least the channel walls 12 and 13 are designed to reflect ultraviolet radiation. For this purpose, the side 14 of the channel wall 12 facing the irradiation section 10 and the side 15 of the channel wall 13 facing the irradiation section 10 have a coating of a material that reflects ultraviolet radiation. The coating reflects ultraviolet radiation hitting pages 14 and 15. This optimizes the radiation intensity distribution in the irradiation section 10 . As an alternative to the coating, the channel walls 12 and 13 are preferably made of a material which reflects ultraviolet radiation.

The air duct 3 also has a first light trap 16 arranged between the irradiation section 10 and the air inlet opening 5 . The first light trap 16 is thus arranged upstream of the irradiation section 10 . The first light trap 16 is configured to block passage of ultraviolet radiation. In this respect, the first light trap 16 prevents the ultraviolet radiation provided by the radiation source 11 from reaching the air inlet opening 5 and exiting the air duct 3 through the air inlet opening 5 . The first light trap 16 thus has a blocking effect for ultraviolet radiation.

A duct wall 17 of the duct 3 delimiting the first light trap 16 is bent in such a way that the air duct 3 has a first bend 18 in the region of the first light trap 16 . In the present case, it is a 180° bend. Accordingly, the air flow in the area of the first light trap 16 is deflected by 180°. The first bend 18 prevents direct emission of ultraviolet radiation through the air inlet opening 5. In this respect, the curved duct wall 17 also forms the first light trap 16 due to the first bend 18. The channel wall 17 is designed to absorb ultraviolet radiation. For this purpose, the channel wall 17 has a Coating made of an ultraviolet radiation absorbing material. If ultraviolet radiation impinges on the channel wall 17, the ultraviolet radiation is at least partially absorbed. Correspondingly, at most part of the ultraviolet radiation impinging on the channel wall 17 is reflected. The coating of the channel wall 17 that absorbs ultraviolet radiation also contributes to the blocking effect of the first light trap 16.

The first light trap 16 also has a plurality of air guide elements 19, in this case two, which are arranged in the air duct 3 and each have a longitudinal section in the shape of a circular arc. The air guiding elements 19 optimize the guidance of the air flow with regard to a flow that is as uniform as possible or with little turbulence in the area of the first light trap 16. The air guiding elements 19 also have a coating made of a material that absorbs ultraviolet radiation and are therefore designed to absorb ultraviolet radiation. The air guide elements 19 or the ultraviolet radiation-absorbing coating of the air guide elements 19 therefore contribute to the blocking effect of the first light trap 16. The shape and arrangement of the air guide elements 19 will be discussed later with reference to FIG figures 4 and 5 explained in more detail.

The air duct 3 also has an air supply chamber 20 arranged between the first light trap 16 and the air inlet opening 5 . The air supply chamber 20 is thus arranged upstream of the first light trap 16 . Correspondingly, air that enters the air duct 3 through the air inlet opening 5 first enters the air supply chamber 20. By providing the air supply chamber 20, a uniform inflow of the air flow into the first light trap 16 is achieved. The air supply chamber 20 is delimited in the height direction of the air supply chamber 20 on the one hand by the outlet plate 7 and on the other hand by the duct wall 13 . The side 21 of the duct wall 13 facing the air supply chamber 20 and the side 22 of the outlet plate 7 facing the air supply chamber 20 are designed to absorb ultraviolet radiation. For this purpose, these sides 21 and 22 also have a coating made of a material that absorbs ultraviolet radiation.

The air duct 3 also has a second light trap 23 arranged between the irradiation section 10 and the air outlet opening 6 . The second light trap 23 is thus arranged downstream of the irradiation section 10 . In terms of its design, the second light trap 23 essentially corresponds to the first light trap 16. In this respect, the air duct 3 has a duct wall 24 that delimits the second light trap 23 and is bent in such a way that the air duct 3 has a second bend in the area of the second light trap 23 25 has. In addition the second light trap 23 also has a plurality of air guide elements 26 which are arranged in the air duct 3 and each have a longitudinal section in the shape of a circular arc. The duct wall 24 and the air guiding elements 26 also have a coating made of a material that absorbs ultraviolet radiation. Preferably, the first light trap 16 and the second light trap 23 are mirror-symmetrical to one another.

The air duct 3 also has an air discharge chamber 27 arranged between the second light trap 23 and the air outlet opening 6 . The air discharge chamber 27 is thus arranged downstream of the second light trap 23 . Correspondingly, air exiting the second light trap 23 first enters the air discharge chamber 27. By providing the air discharge chamber 27, a uniform discharge of the air flow from the irradiation chamber 10 or from the second light trap 23 is achieved. The air discharge chamber 27 is delimited in the vertical direction by the duct wall 12 on the one hand and by a duct wall 28 on the other hand. The side 29 of the duct wall 12 facing the air discharge chamber 27 and the side 30 of the duct wall 28 facing the air discharge chamber 27 are designed to absorb ultraviolet radiation. For this purpose, these sides 29 and 30 also have a coating made of a material that absorbs ultraviolet radiation.

The air supply chamber 20, the first light trap 16 and the irradiation section 10 are formed together in a C-shape. This achieves a particularly compact configuration of the ventilation device 1 . This is due in particular to the fact that the irradiation section 10 and the air supply chamber 20 are delimited by a common duct wall, namely the duct wall 13 . One of the sides 15 of the channel wall 13 delimits the irradiation section 10, the other side 21 of the channel wall 13 delimits the air supply chamber 20.

The irradiation section 10, the second light trap 23 and the air discharge chamber 27 are formed together in a C-shape. A particularly compact configuration of the ventilation device 1 is also achieved in this way. This is due in particular to the fact that the irradiation section 10 and the air discharge chamber 27 are delimited by a common duct wall, namely the duct wall 12 . One of the sides 14 of the channel wall 12 delimits the irradiation section 10, the other side 29 of the channel wall 12 delimits the air discharge chamber 27.

Due to the C-shaped design of the air supply chamber 20, the first light trap 16 and the irradiation section 10 and the C-shaped design of the irradiation section 10, the second light trap 23 and the air discharge chamber 27, these sections of the air duct 3 are jointly S-shaped.

In figure 4 two further sectional views of the ventilation device 1 are shown. The left-hand sectional view A shows the flow direction 9 of the air flow in the area of the first light trap 16. The right-hand sectional view B shows, by way of example, the course of the provided ultraviolet radiation in the area of the first light trap 16.

This in figure 4 The ventilation device 1 shown differs from that in figure 3 illustrated ventilation device 1 in terms of the number of air guide elements 19. The in figure 4 The device 1 shown has four air-guiding elements 19, namely a first air-guiding element 19A, a second air-guiding element 19B, a third air-guiding element 19C and a fourth air-guiding element 19D.

The air guide elements 19 each have a circular arc-shaped longitudinal section. In the present case, the arcuate shapes of the air guiding elements 19 have the same angle, namely an angle of 180°. The radius of the circular arc shape of the first air guiding element 19A is greater than the radius of the circular arc shape of the second air guiding element 19B. The radius of the circular arc shape of the second air guide 19B is greater than the radius of the circular arc shape of the third air guide 19C. The radius of the circular arc shape of the third air guide element 19C is greater than the radius of the circular arc shape of the fourth air guide element 19D.

The air guide elements 19 are aligned or arranged in such a way that the bulges 31A, 31B, 31C and 31D of the arc shapes of the air guide elements 19 point in the same direction.

The circular arc shape of the first air guiding element 19A defines a first circle segment. The second air guiding element 19B is arranged at a distance from the first air guiding element 19A and in the first circle segment. The circular arc shape of the second air guiding element 19B defines a second circle segment. The third air guiding element 19C is arranged at a distance from the second air guiding element 19B and in the second circle segment. The circular arc shape of the third air guiding element 19C defines a third circle segment. The fourth air guiding element 19D is arranged at a distance from the third air guiding element 19C and in the third circle segment. The air guiding elements 19 are preferably arranged or designed in such a way that the first ends 32 of the air guiding elements 19 facing the radiation source 11 are at the same height as seen in the direction of flow 9 . The air guiding elements 19 are preferably also arranged or designed in such a way that the second ends 33 of the air guiding elements 19 facing away from the radiation source 11 are at the same height as seen in the flow direction 9 .

Due to the arrangement or design of the air guiding elements 19, a flow path 34 for the air flow is formed between two adjacent air guiding elements 19 and between the first air guiding element 19A and the duct wall 17.

According to the figure 4 In the exemplary embodiment illustrated, the height h of the irradiation section 10 corresponds at least essentially to the height h' of the air supply chamber 20. In order to achieve the most uniform possible flow through the first light trap 16 in this case, the air guiding elements 19 are arranged concentrically. This means that each of the flow paths 34 has a constant cross section in the direction of flow 9 .

The course of ultraviolet radiation in the area of the first light trap 16 is explained below with reference to the right-hand sectional view B. If ultraviolet radiation enters one of the flow paths 34, the ultraviolet radiation is reflected multiple times between the air guiding elements that define the flow path. Due to the coating of the air guiding elements 19, the radiation intensity of the ultraviolet radiation decreases with each impact on one of the air guiding elements 19. If ultraviolet radiation reaches the flow path 34 formed between the first air-guiding element 19A and the second air-guiding element 19B, for example according to the radiation path 35, the ultraviolet radiation initially strikes the first air-guiding element 19A at a point P1. In the process, the ultraviolet radiation is partially absorbed, so that only part of the ultraviolet radiation is thrown back in the direction of the second air guiding element 19B. This portion strikes the second airfoil 19B at a point P2, again partially absorbing the incident ultraviolet radiation. The number of reflections that the ultraviolet radiation undergoes when passing through one of the flow paths 34 is defined in particular by the width of the flow path 34 or the distance between the air guiding elements 19 that delimit the flow path 34 . The smaller the width of the flow path or the distance between the air guiding elements 19, the greater the number of reflections.

In figure 5 two sectional views of the ventilation device 1 are shown according to a further exemplary embodiment. The sectional view C on the left shows the flow direction 9 of the air flow in the area of the first light trap 16. The sectional view D on the right shows an example of the course of ultraviolet radiation in the area of the first light trap 16.

According to the figure 5 In the exemplary embodiment illustrated, the height h of the irradiation section 10 differs from the height h' of the air supply chamber 20. In the present case, the height h is greater than the height h'. In order to achieve the most uniform possible flow through the first light trap 16 in this case, the air guiding elements 19 are arranged eccentrically in such a way that the distance between the first ends 32 of two adjacent air guiding elements 19 is greater than the distance between the second ends 33 of the same Air guiding elements 19. This causes the cross section of the flow paths 34 to increase in the direction of flow 9. The ventilation device 1 described here is in this respect in particular a structural unit which is easy to handle and assemble and which is in particular encompassed and designed by the housing 2 .

According to an alternative embodiment - not shown here - the device 1 is assembled as a ventilation device from several individual modules, with each individual module having one or more of the devices described above, such as a light trap, an irradiation chamber, an air supply or air removal chamber or an air conveying device. The individual modules can be connected to one another directly in terms of flow technology and mechanically or with the aid of further intermediate modules or parts, by means of which two individual modules following one another in the direction of flow are connected to one another. As a result, for example, the fitter is offered the opportunity to arrange the individual modules in a suitable manner relative to one another and to connect them to one another on site during assembly.

Claims (23)

Ventilation device (1) for a room in a building, having an air duct (3) which has an air inlet opening (5) at one end and an air outlet opening (6) at the other end, and an air conveying device (4) for conveying one of the air inlet openings (5) to the air outlet opening (6) through the air duct (3), characterized by at least one radiation source (11) for providing ultraviolet radiation, the radiation source (11) being assigned to the air duct (3) in such a way that the radiation source (11) provided ultraviolet radiation in an irradiation section (10) of the air duct (3) emits. Ventilation device according to Claim 1, characterized in that the radiation source (11) is designed as a UVC low-pressure lamp (11). Ventilation device according to one of the preceding claims, characterized in that the radiation source (11) is arranged in the air duct (3) in such a way that the radiation source (11) is surrounded by the air flow. Ventilation device according to one of the preceding claims, characterized in that the radiation source (11) is rod-shaped. Ventilation device according to one of the preceding claims, characterized in that the radiation source (11) is arranged in such a way that a longitudinal central axis of the radiation source (11) is aligned perpendicular to the longitudinal extension of the irradiation section (10). Ventilation device according to one of the preceding claims, characterized by at least one further radiation source (11A) for providing ultraviolet radiation, wherein the further radiation source (11A) is assigned to the air duct (3) in such a way that ultraviolet radiation provided by the further radiation source (11A) enters the Irradiation section (10) emits. Ventilation device according to one of the preceding claims, characterized in that at least one duct wall (12, 13) of the air duct (3) in the irradiation section (10), preferably all duct walls (12, 13) of the air duct (3) in the irradiation section (10 ) is/are designed to reflect ultraviolet radiation. Ventilation device according to one of the preceding claims, characterized in that the air duct (3) between the irradiation section (10) and the air inlet opening (5) has a first light trap (16) and/or that the air duct (3) between the irradiation section (10 ) and the air outlet opening (6) has a second light trap (23). Ventilation device according to Claim 8, characterized in that at least one duct wall (17, 24) of the air duct (3) in the area of the first light trap (16) and/or in the area of the second light trap (23), preferably all duct walls (17, 24 ) of the air duct (3) in the area of the first light trap (16) and/or in the area of the second light trap (23) is/are designed to absorb ultraviolet radiation. Ventilation device according to one of Claims 8 and 9, characterized in that the air duct (3) has a first bend (18) to form the first light trap (16) and/or that the air duct (3) to form the second light trap ( 23) has a second bend (25), in particular a bend of 180°. Ventilation device according to one of 8 to 10, characterized in that the air duct (3) has an air supply chamber (20) between the air inlet opening (5) and the first light trap (16), and/or that the air duct (3) between the air outlet opening (6) and the second light trap (23) has an air discharge chamber (27). Ventilation device according to claim 11, characterized in that at least one duct wall (13, 7) of the air duct (3) in the area of the air supply chamber (20), preferably all duct walls (13, 7) of the air duct (3) in the area of the air supply chamber (20 ) designed to absorb ultraviolet radiation. Ventilation device according to one of Claims 11 and 12, characterized in that at least one duct wall (12, 28) of the air duct (3) in the area of the air discharge chamber (27), preferably all duct walls (12, 28) of the air duct (3) in the area the air discharge chamber (27) is/are adapted to absorb ultraviolet radiation. Ventilation device according to one of Claims 8 to 13, characterized by at least one air guide element (19, 26) which extends through the air duct (3) in the region of the first light trap (16) or the second light trap (23). Ventilation device according to Claim 14, characterized in that the air guide element (19, 26) is designed to absorb ultraviolet radiation. Ventilation device according to one of Claims 14 and 15, characterized in that the air guide element (19, 26) has a longitudinal section in the shape of a circular arc. Ventilation device according to Claim 16, characterized by at least one first air guiding element (19) with a circular arc-shaped longitudinal section and a second air guiding element (19B) with a circular arc-shaped longitudinal section, the radius of the circular arc shape of the first air guiding element (19A) being greater than the radius of the circular arc shape of the second air guiding element (19B), wherein the bulges (31A, 31B) of the arc shapes of the air guiding elements (19A, 19B) point in the same direction, and wherein the second air guiding element (19B) is in a circular segment defined by the arc shape of the first air guiding element (19A) and spaced from the first air guide element (19A). Ventilation device according to Claim 17, characterized in that the first air guiding element (19A) and the second air guiding element (19B) are arranged concentrically to one another. Ventilation device according to Claim 17, characterized in that the first air guiding element (19A) and the second air guiding element (19B) are arranged eccentrically to one another. Ventilation device according to Claim 11, characterized in that the air supply chamber (20), the irradiation section (10) and the air discharge chamber (27) are arranged parallel to one another in the flow direction. Ventilation device according to one of the preceding claims, characterized in that the ventilation device (1) is designed overall as a structural unit. Ventilation device according to one of the preceding claims, characterized by the design as a ventilation device made up of individual modules. Room of a building, characterized by a ventilation device (1) according to one of Claims 1 to 22.

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