DE102021108832A1 - Multifunctional room luminaire with air purification functionality - Google Patents

Abstract

A multi-function room light includes: a housing having an air duct formed therein that is configured to direct air between an air inlet for introducing ambient air into the housing and an air outlet for discharging air from the housing; a radiation source for emitting ultraviolet radiation which is configured to irradiate air located in the air duct with UV-C radiation and with UV-A radiation in order to eliminate any particles in the air, in particular biological germs or odor particles; and one or more visible light sources.

Description

The present invention relates to a multifunctional room luminaire, in particular for illuminating interiors, which, in addition to a lighting functionality, also has an air cleaning functionality, in particular an air disinfection functionality and an odor reduction functionality. The multifunctional room light can be designed in particular for lighting and air purification in fixed rooms, such as living or office rooms in buildings, or for lighting and air purification in mobile rooms. Such mobile spaces can in particular be interior spaces, such as passenger cabins, in vehicles, such as motor vehicles or rail vehicles, aircraft, military vehicles or watercraft.

In the DE 10 2013 225 255.2 describes a multifunctional ceiling light which has a UV radiation device which is designed to clean the air flowing through an air channel defined within a flow box of the ceiling light by means of UV radiation.

In the DE 20 2016 005 759.7 describes an air cleaning device which is based on the use of ultraviolet light to render germs harmless.

The present invention is based on the object of providing a further improved multifunctional room light.

The solution to this problem is achieved in accordance with the teaching of the independent claims. Various embodiments and developments of the invention are the subject of the subclaims.

In one aspect, the multi-function room light includes: (i) a housing having an air duct formed therein that is configured to direct air between an air inlet for admitting ambient air into the housing and an air outlet for exhausting air from the housing; (ii) a radiation source for emitting ultraviolet radiation which is configured to irradiate air located in the air duct with UV-C radiation and with UV-A radiation in order to eliminate any particles in the air, in particular biological germs or odor particles ; and (iii) one or more visible light sources.

The use of both UV-A and UV-C radiation has the particular advantage that a wide variety of interfering germs or other, in particular organic, particles which have different sensitivities for different wavelengths can be effectively combated equally, in particular at the same time. The combination of lighting function and air cleaning function in the same device is also advantageous with regard to a particularly space-saving solution for providing both functions. The power supply that is regularly to be provided for a lighting device can also be used here at the same time to supply the air cleaning functionality without the need for a separate power connection, for example via a socket or an additional line. The UV-C radiation can be used in particular to kill or render harmless viruses, bacteria, pollen, spores or other pathogens, while the UV-A radiation can be used in particular to weaken or eliminate odors.

The terms “comprises”, “includes”, “includes”, “has”, “has”, “with”, or any other variant thereof, used herein are intended to cover a non-exclusive inclusion. For example, a method or apparatus that includes or has a list of elements is not necessarily limited to those elements, but may include other elements that are not expressly listed or that are inherent in such a method or apparatus.

Furthermore, unless expressly stated to the contrary, “or” refers to an inclusive or rather than an exclusive “or”. For example, a condition A or B is met by one of the following conditions: A is true (or present) and B is false (or absent), A is false (or absent) and B is true (or present), and both A and B are true (or present).

As used herein, the terms “a” or “an” are defined in the sense of “one or more”. The terms “another” and “another” as well as every other variant thereof are to be understood in the sense of “at least one further”.

The terms “plural” or “several” (and modifications thereto) as used here are to be understood in the sense of “two or more”.

The term “configured” or “set up” to fulfill a certain function (and respective modifications thereof) is to be understood in the sense of the invention that the corresponding device is already in a configuration or setting in which it can or can perform the function it is at least adjustable - ie configurable - so that it can execute the function after the appropriate setting. The configuration can, for example, via a corresponding Setting of parameters of a process sequence or of switches or the like for activating or deactivating functionalities or settings take place. In particular, the device can have several predetermined configurations or operating modes, so that the configuration can take place by means of a selection of one of these configurations or operating modes.

Preferred embodiments of the multifunctional room light are described below, each of which, unless this is expressly excluded or is technically impossible, can be combined with one another as desired.

In some embodiments, the air duct has a first air chamber and a second air chamber, which are arranged along the air duct, in particular sequentially, that the air duct leads through both air chambers. In addition, the radiation source is configured to radiate UV-C radiation into one of the two air chambers and UV-A radiation into the other air chamber. In this way, in particular, the formation of the radiation source by means of separate sources for UV-C radiation on the one hand and UV-A radiation on the other hand can be facilitated, since the sources can each be individually dimensioned and arranged relative to their respective associated air chamber. On the other hand, in particular sequential irradiation with the different wavelength ranges can be achieved, which can be used advantageously in particular for combating particles which are particularly sensitive to such sequential multiple irradiation. In addition, by separating the types of radiation, their respective radiation intensities can be set, at least largely, independently of one another, since they only have to be set or limited individually, but not in combination with regard to any maximum possible or permitted intensities per radiation volume (here air chamber).

In some embodiments, the first air chamber and the second air chamber are arranged along the air channel such that the flow path defined between the air inlet and the air outlet by the course of the air channel in the second air chamber has a second path section that extends in another direction, in particular in one direction opposite direction, as a first, different path section of the flow path in the first air chamber. In particular, this allows particularly space-saving or spatially compact implementations of the air cleaning function and thus also of the multifunctional room light as a whole.

In some embodiments, the air duct has a constriction between the first air chamber and the second air chamber, in particular a connecting opening designed as a constriction of the air duct and connecting the two air chambers. This can be used in particular to limit an air passage rate and thus a flow rate of the air flow or to spatially separate the radiation areas for UV-C radiation on the one hand and UV-A radiation on the other hand, in particular with regard to a different design or lining of the corresponding air chambers. In particular, a contribution can thus also be made to reducing or avoiding an unintentional escape of UV radiation from the multifunctional room lamp, in particular from its air chamber through which the air flow first passes.

In some embodiments, the radiation source has a source for the UV-C radiation and a source for the UV-A radiation that is separate therefrom. This allows in particular an individual optimization of the respective sources for their purpose as well as an independent maintenance or exchange of the individual sources.

In some embodiments, the radiation source for generating at least part of the ultraviolet radiation has a light-emitting diode, LED, or a low-pressure lamp, in particular a low-pressure mercury lamp or a low-pressure halogen lamp. LEDs in particular are advantageous with regard to a long service life, low power consumption and / or low space requirements, while the other lamp shapes mentioned offer advantages, in particular with regard to high radiation outputs.

In some embodiments, the geometry of the air duct and the arrangement of the radiation source are designed such that, when the multifunctional room light is in operation, the ultraviolet radiation radiated into the air duct by the radiation source cannot, at least essentially, escape from the housing. This serves the safety of any living beings, in particular PERsons and animals, in the spatial environment of the multifunctional room light with simultaneous operation of the radiation source.

In some embodiments, the multifunctional room light also has one or more fans for conveying air through the air duct. This can in particular be a fan that is configured to suck in ambient air through the air inlet, and / or a fan that is configured to expel air irradiated with UV radiation in the air duct through the air outlet. In this way, a desired, in particular higher and / or possibly controllable, Flow rate for the flow of room air through the air duct and thus achieve a correspondingly optimized air purification.

In some embodiments, the multifunctional room light is configured to use the at least one fan ^{to guide an air volume of at least 10 m 3} / h through the air duct and to irradiate at least partially using the ultraviolet radiation emitted by the radiation source. This means that at least rooms with small and medium-sized rooms, such as are typical in the home or office area or in trains, can usually be cleaned effectively and quickly of unwanted particles, in particular pathogens or odors, by using a single such multifunctional room light.

In some embodiments, the multifunctional room light also has a first sensor system for direct or indirect detection of at least one of the following variables: a body temperature of one or more people in the spatial environment of the multifunctional room light, a carbon dioxide content of the air in the spatial environment of the multifunctional room light, an aerosol content of the Air in the spatial environment of the multifunctional room luminaire. The multifunctional room light is also configured to control at least one of its following operating variables as a function of a respective measured value of the at least one detected variable: an air delivery rate of the at least one fan, a wavelength or radiation output of the radiation source, a lighting output of at least one of the light sources. In particular, it is thus possible to dynamically adapt the cleaning performance of the multifunctional room light to a current cleaning requirement, as measured by the first sensor system. The presence of one or more people, the CO ₂ content and the aerosol content of the air are, individually and also in combination, good indicators of the potential air pollution with undesired particles from which the air in the room has to be cleaned.

In some embodiments, the multifunctional room light has an ambient irradiation operating mode that can be selected, for example by means of a timer, in which it emits UV-C radiation, in particular so-called “far UV-C radiation” (typically at a wavelength of approx. 222 nm) their spatial environment radiates. In this way, the cleaning effect of the UV-C radiation can also be extended into a radiation field outside of the multifunctional room lamp in its spatial environment when the ambient irradiation operating mode is activated, for example in order to disinfect surfaces of objects such as furnishings there.

In some embodiments, the multifunctional room light also has a second sensor system, such as a motion detector, for detecting the presence of one or more people and / or animals, e.g. pets such as dogs or cats, in the spatial environment of the multifunctional room light. The multifunctional room light is also configured to control the ambient irradiation operating mode depending on the presence or absence of one or more people or animals detected by means of the second sensor system, in particular to activate or deactivate it or with regard to the properties of the UV-C radiation used such as their intensity, wavelength or radiation pattern. In this way, the safety of the multifunctional room light can be increased in a targeted manner and the occurrence of radiation-related damage to people or animals due to the irradiation of the surroundings by the multifunctional room light can be countered. The second sensor system can in particular also coincide with the first sensor system or be designed to be integrated with it.

In some embodiments, the multifunctional room light also has a man-machine interface or another data interface. The multifunctional room light is configured to output information relating to one or more of its operating variables or information detected by means of sensors via at least one of these interfaces, or to receive control information for the configuration or control of the multifunctional room light. In this way, on the one hand, information on the operating state or operating mode of the multifunctional room light or on measured variables detected by its sensor system (s) can be output. On the other hand, external data-based control of functionalities of the multifunctional room light can be enabled, for example control (this term, as used herein, should also include the possibility of regulation) by means of a remote control (e.g. via radio or infrared signal) or an application on a mobile device Terminal device or a remote control system for one or more lights.

In some embodiments, the radiation source is equipped with a splinter guard, which in particular can have a casting compound at least partially surrounding the radiation source, the splinter guard being configured to counteract the release of splinters in the event of damage to the radiation source.

In some embodiments, the housing is at least partially formed from a material that includes anodized aluminum. On the one hand, this allows a high mechanical Achieve robustness of the multifunctional room luminaire and at the same time good heat transport to the outside, in particular for the heat generated directly or indirectly by the radiation source or the light source (s).

In some embodiments, the multifunctional room light has at least one of the following devices: (i) a connector plug configured for connection to a cigarette lighter connection of a motor vehicle for an electrical power supply of the multifunctional room light; (ii) a voltage converter for converting an electrical supply voltage supplied to the multi-function room lamp into at least one internal operating voltage of the multi-function room lamp; (iii) a monitoring device for detecting a defect in the radiation device, another component, or a power or signal line of the multifunctional room light; (iv) at least one reduction element, which can in particular be a plate, and which is arranged in the air duct in such a way that it is illuminated with the UV-A light when the multifunctional room lamp is in operation, and which has a material on its surface, in particular in shape a corresponding coating that has a chemically reducing effect under the influence of UV-A radiation, in particular on carbon-containing particles in the air passed through the air duct.

Further advantages, features and possible applications of the present invention emerge from the following description in connection with the figures, which illustrate an exemplary embodiment of a multifunctional room light according to the invention.

• 1A schematisch eine Querschnittsansicht einer ersten beispielhaften Ausführungsform einer erfindungsgemäßen Multifunktionsraumleuchte;
• 1B schematisch eine Querschnittsansicht einer zweiten beispielhaften Ausführungsform einer erfindungsgemäßen Multifunktionsraumleuchte mit zusätzlichem Umfeldbestrahlungs-Betriebsmodus;
• 2 schematisch eine perspektivische Ansicht des zwei verschiedene kommunizierende Kammern aufweisenden Luftkanals innerhalb der jeweiligen Multifunktionsraumleuchte aus 1A oder 1B, einschließlich des Lufteinlasses und des Luftauslasses für den Luftkanal;
• 3 schematisch eine Illustration eines möglichen Verlaufs des Luftkanals innerhalb der jeweiligen Multifunktionsraumleuchte aus 1A oder 1B in einer Aufsicht;
• 4 eine perspektivische Ansicht einer in eine Raumdecke integrierten Multifunktionsraumleuchte gemäß einer bevorzugten Ausführungsform der Erfindung, insbesondere gemäß 1A oder 1B;
• 5 eine perspektivische Ansicht einer Multifunktionsraumleuchte gemäß einer weiteren bevorzugten Ausführungsform der Erfindung, insbesondere gemäß 1A oder 1B.

It shows:

• 1A schematically a cross-sectional view of a first exemplary embodiment of a multifunctional room light according to the invention;
• 1B schematically, a cross-sectional view of a second exemplary embodiment of a multifunctional room light according to the invention with an additional ambient irradiation operating mode;
• 2 schematically shows a perspective view of the air duct having two different communicating chambers within the respective multifunctional room light 1A or 1B including the air inlet and the air outlet for the air duct;
• 3 schematically an illustration of a possible course of the air duct within the respective multifunctional room light 1A or 1B in a supervision;
• 4th a perspective view of a multifunctional room light integrated in a room ceiling according to a preferred embodiment of the invention, in particular according to FIG 1A or 1B ;
• 5 a perspective view of a multifunctional room light according to a further preferred embodiment of the invention, in particular according to 1A or 1B .

In the figures, the same reference symbols are used throughout for the same or corresponding elements of the invention.

• - Die Multifunktionsraumleuchte wird mit Anschluss an die Stromversorgung in Betrieb genommen. Es kann auch ein Hauptschalter vorgesehen sein.
• - Die Lufteinigungsvorrichtung weist ein oder mehrere Gebläse, bevorzugt zwei Gebläse, auf, womit die Raumluft aktiv durch den Luftkanal im Geräteinnenraum geleitet werden kann. Insbesondere kann ein Gebläse zum Ansaugen von Raumluft in das Gerät und ein weiteres Gebläse zum Ausstoßen der gereinigten Raumluft zum Einsatz kommen.
• - In der Lufteinigungsvorrichtung wird über den Lufteinlass zugeführte Umgebungsluft, insbesondere Raumluft, in dem Geräteinnenraum entlang des Luftkanals durch zwei Kammern geführt.
• - In einer ersten Kammer erfolgt, mittels Bestrahlung durch UV-C-Licht (insbesondere Verwendung von Niederdrucklampen und/ oder LED-Lampen möglich), ein Abtöten von Viren, Bakterien, Sporen oder sonstigen Krankheitserregern. Die zugeführte Luft wird hierfür, vorzugsweise unmittelbar, an der UV-C-Lampe vorbeigeführt.
• - Die Luft wird sodann in eine weitere, zweite Kammer geleitet. In dieser Kammer wird/ werden mittels UV-A-Strahlung Gerüche neutralisiert, (insbesondere Geruchspartikel auf Basis von Kohlenstoff, insbesondere Kohlenstoffmolekülen). Die zugeführte Luft wird hierfür, vorzugsweise unmittelbar, an der UV-A-Lampe vorbeigeführt. Die Reihenfolge der beiden Kammern entlang des Luftkanals kann auch umgekehrt sein.
• - Die von Viren, Bakterien, Sporen oder sonstigen Krankheitserregern und Gerüchen gereinigte Luft wird sodann durch den Luftauslass aus der Lufteinigungsvorrichtung in den umgebenden Raum oder an eine etwaige an den Luftauslass gekoppelte andere Vorrichtung in die Umgebung zurückgeführt bzw. ausgegeben.

A multifunctional room luminaire according to the invention can in particular have one or more of the following aspects in terms of its structure or mode of operation:

• - The multifunctional room light is put into operation when it is connected to the power supply. A main switch can also be provided.
• The air cleaning device has one or more fans, preferably two fans, with which the room air can be actively passed through the air duct in the interior of the device. In particular, a fan can be used to suck in room air into the device and another fan can be used to expel the cleaned room air.
• In the air cleaning device, ambient air, in particular room air, supplied via the air inlet is guided in the interior of the device along the air duct through two chambers.
• - Viruses, bacteria, spores or other pathogens are killed in a first chamber by means of irradiation with UV-C light (in particular the use of low-pressure lamps and / or LED lamps is possible). For this purpose, the air supplied is led past the UV-C lamp, preferably directly.
• - The air is then passed into a further, second chamber. In this chamber, odors are neutralized by means of UV-A radiation (in particular odor particles based on carbon, in particular carbon molecules). For this purpose, the air supplied is led past the UV-A lamp, preferably directly. The order of the two chambers along the air duct can also be reversed.
• - The air that has been cleaned of viruses, bacteria, spores or other pathogens and odors is then removed through the air outlet of the air cleaning device into the surrounding space or to any other device coupled to the air outlet into the environment.

• - ein 2-Kammersystem in dem Gehäuse der Multifunktionsraumleuchte.
• - Die Multifunktionsraumleuchte ist ein geschlossenes System in dem Sinne, dass im Betrieb keine UV-Strahlung austreten kann.
• - Die Raumluft wird aktiv in das System geführt, durch das System geleitet und aus dem System geführt.
• - Im eine der Kammern wird UV-C-Strahlung zur Abtötung von Keimen, insbesondere von Viren, Bakterien, Sporen oder sonstigen Krankheitserregern eingestrahlt. Dabei beträgt die Strahlungsleistung der UV-C-Strahlung bevorzugt mehr als 3,8 W, beispielsweise bei einer Wellenlänge von 254 nm. Zur Erzeugung einer solchen Strahlung sind als UV-C-Quelle insbesondere Niederdrucklampen oder LED-Lampen jeweils möglich.
• - In eine der Kammern, insbesondere in eine andere der Kammern, wird UV-A-Strahlung eingestrahlt, um Gerüche zu eliminieren.
• - Die Strahlungsquelle, die insbesondere als Kombination aus UV-A und UV-C Lampen ausgebildet sein kann, weist einen Splitterschutz, insbesondere je Lampe auf. Der Splitterschutz kann insbesondere als zumindest teilweise Umhüllung oder Beschichtung der Lampe mit geeignetem Gusswerkstoff ausgestaltet sein. Dadurch wird im Falle von Lampenbruch (Beschädigung / Bruch der Lampe) einer Freisetzung von Glassplittern (und bei Niederdrucklampen Freisetzung von Quecksilber oder anderen Gasen) entgegengewirkt.
• - Das Gehäuse enthält einen Werkstoff aus eloxiertem Aluminium, insbesondere in mattierter Form, oder ist vollständig daraus aufgebaut.
• - Eine Verkabelung und/oder ein elektronisches Vorschaltgerät für die Strahlungsquelle sind in einem Gehäuseabschnitt, insbesondere einem Profilabschnitt des Gehäuses, integriert sein.
• - Zur Stromversorgung weist die Luftreinigungseinheit einen, insbesondere vormontierten, Zigarettenanzünderanschluss (Stecker) auf, über den das Gerät mit Strom versorgt werden kann.
• - Zumindest einige Gerätekomponenten der Multifunktionsraumleuchte sind individuell oder zusammen vergossen, um eine zumindest weitgehende Erschütterungs- bzw. Vibrationsfreiheit zu erreichen und so insbesondere die Zuverlässigkeit und Langlebigkeit der Multifunktionsraumleuchte zu erhöhen.
• - Die Multifunktionsraumleuchte weist einen 12 V DC oder 24 V DC Anschluss auf, was insbesondere für Automotive-Anwendungen im Hinblick auf einen Anschluss auf ein Fahrzeugbordnetz vorteilhaft sein kann.
• - Mittels eines Spannungswandlers ist das Gerät auch an herkömmliche Netzanschlüsse / Steckdosen (110V/220V) anschließbar und betreibbar, und ist somit insbesondere auch für Innenräume von Gebäuden tauglich.
• - Überwachungseinrichtung zur Erkennung von Lampenausfall oder Kabelbruch.
• - Geräteabsicherung 10A.
• - Leistung / Reinigendes Raumvolumen in Betrieb: 12V Gerät = 12,5m³/h; 24V Gerät = 25m³/h.
• - Beschichtete Oberflächen (insbesondere ein oder mehrere Platten), die mit dem UV-A Licht beschienen werden, um dadurch eine chemisch reduzierende Wirkung, insbesondere auf Kohlenstoffe oder Kohlenstoffverbindungen (Partikel in der zu reinigenden Luft) zu bewirken.
• - Mit der Multifunktionsraumleuchte erreichbare Vorteile können insbesondere ein oder mehrere der Folgenden sein:
• - Desinfektion und Geruchsbeseitigung in einer beide Reinigungsarten kombinierenden Multifunktionsraumleuchte.
• - höchste (HACCP -Compliance (Gefahrenanalyse und kritische Kontrollpunkte, auch Gefahrenanalyse und kritische Lenkungspunkte (englisch hazard analysis and critical control points, abgekürzt HACCP), durch Splitterschutz und Überwachung der Desinfektionsperformanz.
• - Dauerhafter Betrieb möglich, auch wenn sich Personen im Raum aufhalten durch geschlossenes System (kein Austreten von UV-Strahlen)
• - wartungsarmer Betrieb
• - niedrige Betriebskosten
• - Erschütterungs- und Vibrationsfreiheit der Gerätekomponenten (wenn vergossen)
• - Sowohl in Gebäude, z.B. Büro, als auch in Fahrzeugen oder anderen Räumen mit verschiedener Stromsversorgungsmöglichkeit nutzbar durch Verwendung eines Spannungswandlers
• - Die Multifunktionsraumleuchte kann insbesondere eingesetzt werden bei der Beleuchtung und Luftreinigung, insbesondere Luftdesinfektion, in:
• - Gebäuden, insbesondere Büroräume oder Wohnräume
• - LKW
• - Bussen
• - Sonderschutzfahrzeugen
• - Sonderfahrzeugen
• - Militärischen Fahrzeugen
• - Schienenfahrzeugen
• - Flugzeugen
• - Schiffen

In particular, the multifunctional room light can have one or more, in particular all, of the following features:

• - a 2-chamber system in the housing of the multifunctional room light.
• - The multifunctional room light is a closed system in the sense that no UV radiation can escape during operation.
• - The room air is actively led into the system, led through the system and led out of the system.
• - UV-C radiation is radiated into one of the chambers to kill germs, in particular viruses, bacteria, spores or other pathogens. The radiation power of the UV-C radiation is preferably more than 3.8 W, for example at a wavelength of 254 nm. Low-pressure lamps or LED lamps in particular are possible as UV-C sources to generate such radiation.
• - UV-A radiation is radiated into one of the chambers, in particular into another of the chambers, in order to eliminate odors.
• The radiation source, which can in particular be designed as a combination of UV-A and UV-C lamps, has a splinter protection, in particular for each lamp. The splinter protection can in particular be designed as an at least partial envelope or coating of the lamp with a suitable cast material. This counteracts the release of glass splinters (and, in the case of low-pressure lamps, release of mercury or other gases) in the event of a lamp break (damage / breakage of the lamp).
• - The housing contains a material made of anodized aluminum, in particular in a matt form, or is made entirely of it.
• Cabling and / or an electronic ballast for the radiation source can be integrated in a housing section, in particular a profile section of the housing.
• - For the power supply, the air cleaning unit has an in particular pre-assembled cigarette lighter connection (plug) via which the device can be supplied with power.
• At least some device components of the multifunctional room light are cast individually or together in order to achieve at least extensive freedom from vibrations and thus in particular to increase the reliability and longevity of the multifunctional room light.
• The multifunctional room light has a 12 V DC or 24 V DC connection, which can be particularly advantageous for automotive applications with regard to a connection to a vehicle electrical system.
• - By means of a voltage converter, the device can also be connected and operated to conventional mains connections / sockets (110V / 220V), and is therefore particularly suitable for the interior of buildings.
• - Monitoring device for the detection of lamp failure or cable break.
• - Device fuse 10A.
• - Performance / cleaning room volume in operation: 12V device = 12.5m ³ / h; 24V device = 25m ³ / h.
• - Coated surfaces (in particular one or more plates) on which the UV-A light shines in order to have a chemically reducing effect, in particular on carbons or carbon compounds (particles in the air to be cleaned).
• - The advantages that can be achieved with the multifunctional room luminaire can in particular be one or more of the following:
• - Disinfection and odor removal in a multifunctional room light that combines both types of cleaning.
• - highest (HACCP compliance (hazard analysis and critical control points, also hazard analysis and critical control points, abbreviated to HACCP), through splinter protection and monitoring of the disinfection performance.
• - Continuous operation possible, even if people are in the room thanks to a closed system (no leakage of UV rays)
• - low-maintenance operation
• - low operating costs
• - The device components are free of shock and vibration (if encapsulated)
• - Can be used in buildings, e.g. offices, as well as in vehicles or other rooms with different power supply options by using a voltage converter
• - The multifunctional room light can be used in particular for lighting and air purification, especially air disinfection, in:
• - Buildings, in particular offices or living spaces
• - truck
• - fines
• - special protection vehicles
• - special vehicles
• - military vehicles
• - rail vehicles
• - planes
• - ships

A first exemplary embodiment 100 a multifunctional room light according to the invention is in 1A illustrated. The room lamp 100 is particularly suitable for integration in a room ceiling or wall surface 200 (see. 5 ) of a room, be it in a building or, for example, in a vehicle such as a train or a ferry.

The multifunctional room light 100 on the one hand has at least one light source for illuminating a room 110 for visible light 120 and one designed as a headlight, behind the light source 110 arranged, in particular concave, reflection surface 115 for the light on.

Furthermore, the multifunctional room light 100 a radiation source 105 for ultraviolet (UV) radiation. In the case illustrated here, the radiation source 105 has, on the one hand, a UV-A source 105a and on the other hand a UV-C source 105b and is therefore able to emit UV radiation in two different wavelength ranges. The two UV sources are on one in the multifunctional room light 100 trained and between at least one air inlet 175 and at least one air outlet 180 running air duct 125 arranged so that they can each radiate UV radiation into them. When operating the multifunctional room light 100 is through the at least one air inlet 175 room air to be cleaned 130 in the air duct 125 introduced. This can be done in particular using a fan or some other air delivery device. The air in the room 130 is in the air duct 125 exposed to the UV radiation of the two UV sources, in particular to eliminate odor particles or germs, such as pathogens, or to render them harmless, and then as purified room air 135 at at least one air outlet 180 issued again. The blower or a corresponding fan can, in particular, use an air suit 130a feature.

In 2A is a second embodiment 101 a multifunctional room light according to the invention illustrates a further development of the multifunctional room light 100 the end 1A represents, illustrated. In the following, therefore, only the differences to the multi-function room luminaire will be discussed 100 received, while otherwise the explanations above too 1A are also applicable here. The individual differences mentioned can in particular be implemented selectively, that is to say individually or in any combination, in particular all of them.

A first additional feature of the multifunctional room light 101 can consist in the fact that it has an air delivery device, in particular one or more fans, the output of which can be controlled or regulated. A controller can do this 155 be provided, in particular with a wireless data interface 155a can be signal-connected, which is used to establish wireless communication with an external control device 155b provide a human-machine interface (MMI) for a user to configure or control the multifunctional room light 101 provides. Such a terminal can, in particular, be a dedicated remote control for the multifunctional room lamp 101 or a mobile terminal device, such as a smartphone or a tablet computer, on which a corresponding MMI is made available, for example by means of an application or via a browser. Instead, it is also possible to use an MMI directly on the multifunctional room luminaire 101 to be provided.

Additionally or alternatively, it is also possible to measure the output of the air delivery device as a function of one or more sensor signals from a first sensor system 140 which is part of the multifunctional room light in particular 101 can be to control or regulate. The first sensor system 140 , which in turn can have one or more sensors, can in particular be designed to measure an aerosol content, a carbon dioxide content and / or a temperature, in particular a respective body (surface) temperature of one or more people present in the room. All these measured variables have in common that they can serve as good indicators for an increased bacterial load, in particular pathogen load in the room air, especially at times when there are more pathogens in circulation, such as during flu waves or in epidemic or pandemic times. The temperature measurement is useful for a connection with pathogens that can often trigger a fever.

Another distinction can be that the multi-function room luminaire 101 has a selectively activatable ambient irradiation operating mode as a further functionality. If this is activated, the Multifunctional room light 101 UV radiation, in particular UV-C radiation, also in its spatial environment, that is to say in particular in that of it also optionally with the light 120 give off a lightable room. For this purpose, it preferably has a further UV source in the area of the headlight 150 on, such as a UV-C source to irradiate the room, in particular one or more objects located in it (for example, furniture surfaces) with UV radiation and to achieve a cleaning or disinfecting effect there accordingly.

In order to avoid undesirable and potentially dangerous UV radiation effects on any persons or animals in the room, in particular pets or farm animals, the multifunctional room light 101 furthermore a second sensor system 145 which is suitable for detecting the presence of a person or an animal in the room. The second sensor system 145 can in particular have a motion detector for this purpose.

It is also possible that the second sensor system 145 coincides with the first sensor system or is integrated with it as a unit and is possibly based, at least in part, on the same measuring principle, for example a non-contact temperature measurement. If by means of the second sensor system 145 the presence of a person or an animal in the room is detected, the environmental irradiation operating mode is either deactivated or controlled or reconfigured in such a way that the further irradiation of the room by the source 150 is safe for humans and animals. This can in particular relate to a corresponding adaptation of the wavelength or the intensity of the emitted radiation or its spatial or temporal irradiation pattern.

2 represents according to a further embodiment 102 a multifunctional room light according to the invention, which in particular also with one of the embodiments 100 or 101 can coincide, a preferred geometry of the air duct 125 represent. The air duct 125 runs between an air inlet 175 and an air outlet 180 in a non-linear way. In particular, the air duct has a first air chamber (chamber 1) and a second, separate air chamber (chamber 2), which are connected via a connection in the form of a constriction 170 (In particular a hole-like opening) are connected to one another in such a way that through the air duct 125 air to be conveyed from the first air chamber 160 through the bottleneck 170 into the second air chamber 165 can flow.

The air in the first air chamber 160 is when the multifunctional room light is operated 102 from the UV-C source 105b irradiated with UV-C radiation while the air in the second air chamber 165 from the UV-A source 105a is irradiated with UV-A radiation. The two air chambers 160 and 165 are through a partition in which the bottleneck is 170 so separated from each other that the passage of UV-C radiation from the first air chamber 160 into the second air chamber 165 is greatly reduced, and at most to a correspondingly small extent by the constriction 170 into the second air chamber 165 can occur. As a result, the two different irradiation areas are largely separated from one another. It is also conceivable to change the positions of the two UV sources 105a and 105b to swap so that the airflow in the air duct 125 is first irradiated with UV-A radiation and only subsequently with UV-C radiation. However, the aforementioned sequence, in which UV-C radiation initially acts on the air flow, is advantageous in the sense that the geometry of the air duct 125 shields the typically more dangerous of the two types of radiation more effectively.

The two air chambers 160 and 165 are also arranged relative to one another in such a way that the air duct has an angled geometry 125 forms, and which has to make one or more changes of direction in flowing through the room air in order to reach the air outlet 180 to get. Such a geometry is particularly advantageous to the effect that, in a constructive manner, UV-C radiation may escape from the air duct, which may be hazardous to health 125 can be avoided or at least reduced to a harmless level. To supply the multifunctional room light 102 with electrical energy, in particular for the radiation sources or one or more fans for causing an air flow through the air duct 125 , is a power connection 185 intended.

3 shows, according to a further embodiment, a further implementation possibility for the geometry of the air duct 125 as they are in particular in the embodiments 100 and 101 can be used here, an angled geometry is provided in the area of the second air chamber itself, so that a change in direction, in particular a direction inversion of the air flow, also takes place within the second air chamber. This makes it even safer to prevent unwanted UV-C radiation from coming out of the luminaire housing 190 , especially through the air outlet 180 exit.

the 4th and 5 each show, by way of example, one of the multifunctional room lights described above, in particular a multifunctional room light 100 , on the one hand representation integrated into a room ceiling ( 4th ) and on the other hand before such an integration ( 5 ). The multifunctional room light can in particular be box-shaped casing 190 , in particular made of metal, which in particular offers easier integration into a room ceiling or wall and, on the other hand, reliable shielding from the UV radiation of the radiation device 105.

While at least one exemplary embodiment has been described above, it should be understood that a large number of variations exist therefor. It should also be noted that the exemplary embodiments described represent only non-limiting examples, and it is not intended to limit the scope, applicability or configuration of the devices and methods described here. Rather, the preceding description will provide the person skilled in the art with instructions for implementing at least one exemplary embodiment, it being understood that various changes in the mode of operation and the arrangement of the elements described in an exemplary embodiment can be made without departing from the claims in the appended claims the subject matter specified in each case and its legal equivalents are deviated from.

List of reference symbols

100

Multifunctional room light, first embodiment

101

Multifunctional room light, second embodiment

102

Multifunctional room light, third embodiment

103

Multifunctional room light, fourth embodiment

105a

UV-A source

105b

UV-C source

110

Light source for visible light

115

Reflection surface for light (headlights)

120

visible light

125

Air duct

130

incoming room air to be cleaned,

130a

Fan suit

135

discharged, purified room air

140

first sensor system of an aerosol or CO ₂ content of the room air and / or for non-contact measurement of a person's body temperature

145

Second sensor system for detecting the possible presence of one or more people in the vicinity of the multifunctional room light, in particular motion detectors

150

UV-C source for ambient radiation operating mode

155

Controller or control device

155a

(wireless) data interface of the multifunctional room light

155b

Remote control or mobile device with MMI for configuring or controlling the multifunctional room light

160

Chamber 1, UV-C lamp

165

Chamber 2, UV-A lamp

170

Connection chamber 1 to 2

175

Air inlet

180

Rear air outlet

185

Power connection or electrical connection

190

casing

195

Luminaire or illuminated area

200

Room ceiling or wall surface

QUOTES INCLUDED IN THE DESCRIPTION

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

Patent literature cited

• DE 102013225255 [0002]
• DE 202016005759 [0003]

Claims (16)

Multifunctional room luminaire, having: a housing having an air passage formed therein that is configured to pass air between an air inlet for introducing ambient air into the housing and directing an air outlet for discharging air from the housing; a radiation source for emitting ultraviolet radiation which is configured to irradiate air located in the air duct with UV-C radiation and with UV-A radiation in order to eliminate any particles in the air, in particular biological germs or odor particles; and one or more light sources for visible light. Multifunctional room light according to Claim 1 wherein: the air duct has a first air chamber and a second air chamber which are arranged along the air duct, in particular sequentially, that the air duct leads through both air chambers; and the radiation source is configured to radiate UV-C radiation into one of the two air chambers and UV-A radiation into the other air chamber. Multifunctional room light according to Claim 2 , wherein the first air chamber and the second air chamber are arranged along the air duct that the flow path defined between the air inlet and the air outlet by the course of the air duct in the second air chamber has a second path section that extends in another direction, in particular in an opposite direction Direction, runs as a first, different path section of the flow path in the first air chamber. Multifunctional room light according to Claim 3 , wherein the air channel between the first air chamber and the second air chamber has a constriction, in particular a connection opening designed as a constriction of the air channel and connecting the two air chambers. Multifunctional room light according to one of the Claims 2 until 4th , wherein the radiation source has a source for the UV-C radiation and a source separate therefrom for the UV-A radiation. Multi-function room light according to one of the preceding claims, wherein the radiation source for generating at least part of the ultraviolet radiation has a light-emitting diode, LED, or a low-pressure lamp, in particular a low-pressure mercury lamp or a low-pressure halogen lamp. Multi-function room luminaire according to one of the preceding claims, wherein the geometry of the air duct and the arrangement of the radiation source are designed so that when the multi-function room luminaire is in operation, the ultraviolet radiation radiated into the air duct by the radiation source cannot, at least substantially, escape from the housing. Multi-function room luminaire according to one of the preceding claims, further comprising one or more fans for conveying air through the air duct, in particular a fan that is configured to suck in ambient air through the air inlet, and / or a fan that is configured to expel air in the air duct UV radiation of irradiated air is configured through the air outlet. Multifunctional room light according to Claim 8 , wherein the multifunctional room light is configured to use the at least one fan ^{to guide an air volume of at least 10 m 3} / h through the air duct and to irradiate at least partially using the ultraviolet radiation emitted by the radiation source. Multifunctional room light according to Claim 8 or 9 , further comprising: a first sensor system for direct or indirect detection of at least one of the following variables: a body temperature of one or more people in the spatial environment of the multifunctional room light; - A carbon dioxide content of the air in the spatial environment of the multifunctional room light; - an aerosol content of the air in the spatial environment of the multi-function room luminaire; wherein the multifunctional room light is further configured to control at least one of its following operating variables as a function of a respective measured value of the at least one detected variable: an air delivery rate of the at least one fan; - a wavelength or radiation power of the radiation source; - a luminous power of at least one of the light sources. Multi-function room lamp according to one of the preceding claims, wherein the multi-function room lamp has a selectable environment irradiation operating mode in which it emits UV-C radiation into its spatial environment. Multifunctional room light according to Claim 11 , further comprising a second sensor system for detecting the presence of one or more people and / or animals in the spatial environment of the multifunctional room lamp, the multifunctional room lamp also being configured to operate the environment irradiation mode as a function of to control the absence or presence of one or more people or animals detected by means of the second sensor system. Multifunctional room light according to one of the preceding claims, further comprising a man-machine interface or another data interface, the multifunctional room light being configured to output information regarding one or more of its operating parameters or information detected by means of sensors or control information for configuration via at least one of these interfaces or to receive control of the multifunctional room light. Multi-function room luminaire according to one of the preceding claims, wherein the radiation source is equipped with a splinter guard, which in particular can have a casting compound at least partially surrounding the radiation source, the splinter guard being configured to counteract the release of splinters in the event of damage to the radiation source. Multi-function room light according to one of the preceding claims, wherein the housing is at least partially formed from a material which contains anodized aluminum. Multi-function room luminaire according to one of the preceding claims, wherein the multi-function room luminaire has at least one of the following devices: - A connector configured for connection to a cigarette lighter connection of a motor vehicle for an electrical power supply of the multifunctional room light; A voltage converter for converting an electrical supply voltage fed to the multifunctional room lamp into at least one internal operating voltage of the multifunctional room lamp; - A monitoring device for detecting a defect in the radiation device, another component, or a power or signal line of the multifunctional room light; At least a reduction element, which can in particular be a plate which is arranged in the air duct in such a way that it is illuminated with the UV-A light when the multifunctional room lamp is in operation, and which has a material on its surface, in particular in the form of a corresponding coating, which has a chemically reducing effect under the influence of UV-A radiation, in particular on carbon-containing particles in the air passed through the air duct.

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