DE102020130477B4 - Germ removal system with a radiation disinfection device and method for its operation - Google Patents

Abstract

Air cleaning system (100) for removing germs from the room air (RL) of a room with: - at least one radiation disinfection device (60), and - an entrance device (90) for setting up at the entrance, in particular the entrance door ( T), the room, wherein the radiation disinfection device (60) comprises: - an air flow generator (61), - a radiation source (66) for disinfecting radiation, - an electrical or electronic controller (60*) for controlling the radiation Disinfection device (60), wherein - a guiding device (62) is present in order to guide the air flow past the radiation source (66) within its effective range (66'), and/or - the disinfection device (60) is designed in such a way that the Air flow generator (61) moves room air (RL) over a predetermined, in particular adjustable, dwell time within the effective range (66') of the radiation source (66), and the input device (90) comprises: - a people counter (8) for persons (P) who Entrance device (90) in the direction of the room (R) behind, the entrance device (90) being configured to emit an alarm signal when a predetermined maximum number of people is reached, and - a wireless and remotely functioning temperature - Sensor (11), in particular a pyrometer or a thermal imaging camera (27), which measures the surface temperature of the person (P) passing and emits an alarm signal if the surface temperature of the person (P) is too high.

Description

I. Field of application

The invention relates to the removal of germs such as viruses or bacteria from the air in a mostly closed room.

II. Technical background

• Eine 1. Möglichkeit besteht darin, die Raumluft ständig oder so oft gegen nicht mit den Keimen belastete Frischluft auszutauschen, dass die Keimbelastung in der Raumluft keinen gefährlichen Schwellwert erreicht. Bei niedriger Außentemperatur bleibt hierdurch jedoch die Raumtemperatur, zumindest zeitweise, zu niedrig.
• Eine 2. Möglichkeit besteht darin, die Raumluft durch einen Keim-Filter zu leiten und dadurch von Keimen zu befreien, so dass bei ausreichend hoher Filterleistung der gefährliche Schwellenwert an Keimbelastung in der Raumluft nicht erreicht wird.

There are several ways to avoid that the air in an essentially closed room is too heavily contaminated with germs such as viruses or bacteria, so that people who stay in it for a long time can become infected with the germs:

• A first option is to exchange the room air constantly or so often with fresh air that is not contaminated with germs so that the germ load in the room air does not reach a dangerous threshold value. When the outside temperature is low, however, the room temperature remains too low, at least temporarily.
• A second possibility is to direct the room air through a germ filter and thereby free it from germs, so that with a sufficiently high filter performance the dangerous threshold value of germ load in the room air is not reached.

On the one hand, this requires powerful air flow generators - referred to below as fans, regardless of the way in which they cause an air flow - in order to press the air through the extremely fine-meshed filter, which causes high operating costs and is very noisy, so that For the latter reason alone, they cannot be used at congresses, meetings or in training rooms, quite apart from the problem of professionally replacing a germ filter that is full of germs when it has reached its capacity limit.

Although the noise pollution can be minimized if the fan and preferably also the filter are located outside the room in question, this requires a ventilation system with ventilation ducts at least between the room and the fan and germ filter, in a building then preferably in all relevant rooms.

Retrofitting is hardly possible in buildings that do not have such a ventilation system, and if so, it is very expensive and not feasible in the short term.

A third option is not to collect the germs in filters, but to destroy them floating freely in the room air, preferably without contact, which is possible with physical or chemical methods. However, if people are in the room in question at the same time, most chemical options - for example the introduction of a strong reducing agent or disinfectant such as ozone or chlorine - will be ruled out.

Irradiation by means of UV light is known as a method of destroying free-flying germs in the air that is not harmful to animals or humans, whereby the frequency or frequency range must be precisely defined so that ozone is not unintentionally generated at the same time.

The disadvantage is that the germs are only destroyed if the disinfecting radiation has a sufficiently long exposure time to the individual germs - which are usually carried along with the air flow as an aerosol - and there is therefore a sufficient residence time for the germs and also of the individual air molecules in the effective range of the radiation source.

The advantage is that the power of the fans can be very low because, for example, the air flow does not have to overcome a mechanical obstacle such as a filter, and as a result the energy requirement is low, but above all the noise generated by the fan is so quiet that in the In this room, people can easily understand each other by speaking at room volume.

A fundamental problem continues to be that the germ load in the air, in particular with a specific germ, cannot be measured reliably and quickly to check the effectiveness of the respective method and therefore cannot be used to control such a system.

It is only possible to measure the VOC pollution in the air, which only reflects the pollution of the air with organic components, regardless of whether these are harmful germs or harmless organic components.

The previously practiced method, starting from a defined initial state, e.g. a room completely flooded with fresh outside air, also uses the CO2 content increasing due to the people in the room as an indication of a germ load increasing to the same extent - if one of the people is infected with the germ is infected and excretes the germ - and to ventilate the room again when a critical CO2 content of, for example, 250 ppm is reached, is not applicable if the free-flying germs are destroyed, since then the germ load no longer correlates with the CO2 content.

DE 202017007059 U1 discloses a disinfection device with a housing through which an air flow z. B. is directed by a fan. Inside the housing, ozone is first generated by vacuum UV light from a UV source to kill germs in the air, and then the ozone is decomposed again into oxygen under the action of longer-wave UV light with a wavelength of, for example, 254 nm both types of UV light contribute to the disinfection of the air. In addition, the publication describes the coordinated control of a system with several such devices by a central control including various sensors, monitoring devices for the fans and UV sources, humidifiers, etc.

The operation of the device US7658891B1 is similar, but only a single UV source is used, which is surrounded by a lamp housing made of a UV filter material, which only transmits longer-wave UV light, so that under the influence of the light generated by the UV lamp in a through ozone is generated in the inner chamber delimited by the lamp housing and decomposed again in an outer chamber outside the lamp housing. The air to be cleaned is first passed through the inner chamber and then through the outer chamber by means of a fan and a valve before it is fed to a breathing air area of the room to be disinfected. It also describes the use of this device in a hazmat suit or to clean the air in the passenger compartment of a vehicle.

US 2020/0348038 A1 describes a system for air conditioning a building in which UV sources and particle filters are used to disinfect air that is partly recirculated in the building and partly replaced with fresh air. The aim is to optimize the control and/or the design of the system using mathematical models and simulation calculations with a view to finding a compromise between energy consumption and air cleanliness.

CN 110575559A describes a system for automatically air conditioning and disinfecting an intensive care unit room. This system includes an air conditioner, a fan, a UV sterilization lamp, a spray disinfection device, a power window, an IR temperature sensor as a person detector, a temperature sensor for measuring the body temperature of a patient in the room, and a detector for the concentration of bacteria in the room. In the entrance area outside the room, an operating screen for a central control device of the room is provided as an input device, on which the various parameters such as temperature, air quality, etc. can also be viewed. The people detector is used to ensure that disinfection with the spray disinfection device is only carried out when there are no people in the room.

WO 2017/147460 A1 describes a system for automatically disinfecting a closed space, for example in a hospital, using a radiation source for germicidal radiation, in particular UV radiation, as well as a camera and an image recognition system. The system is designed to detect and track people in the room and to distinguish areas of people protected by UV protective clothing from exposed skin, with only those areas of the room being exposed to the disinfecting UV radiation in a targeted manner where there are no people or at least no areas of exposed skin. An entry device is provided into which entering persons can enter identification data. This can also be done automatically, for example by reading an RFID chip attached to the person.

WO 92/20974 A1 describes a disinfection device, in particular for air conditioning systems in office buildings, in which air is conveyed, for example by means of a fan, through a chamber which is equipped with a UV lamp, a control for the UV lamp and several baffles which, among other things, ensure that the air flow is exposed to UV radiation long enough to achieve adequate disinfection.

III. Presentation of the invention

a) Technical task

It is therefore the object of the present invention to provide an improved air cleaning system for substantially closed spaces using a disinfecting device based on disinfecting radiation, including a method for operating such a system.

b) Solution of the task

This object is solved by the features of the independent claims. Advantageous embodiments result from the dependent claims.

As is known, the radiation disinfection device initially has a radiation source for generation gene of the disinfecting radiation and an air flow generator - hereinafter referred to as a fan for short - to guide the room air close enough, i.e. in the effective area of the radiation source, along this while maintaining a sufficiently long dwell time in the effective area, as well as an electrical or electronic control for Controlling the disinfection device.

According to the invention, there is either a guide device to guide the air flow through the effective area in a targeted manner and/or the disinfection device is designed overall in such a way that the room air guided through the effective area by the fan is ventilated for a predetermined dwell time - considered for each individual component of this air flow there is an air molecule, oxygen molecule, nitrogen molecule or an aerosol, or a germ or a solid particle - in the effective area.

The latter can be achieved by setting the flow rate of the air flow in the effective area in the correct relation to the distance through the effective area in order to ensure a sufficiently long dwell time.

The residence time should preferably also be adjustable, in particular the flow rate should be adjustable, in particular the power or speed of the fan should be adjustable.

The radiation source is preferably a UV light source, preferably a UV-C light source. Such UV light should have a wavelength between 200 and 300 nm (nanometres), preferably between 220 nm and 280 nm, in particular between 230 nm and 270 nm, in particular between 250 nm and 260 nm, since this frequency range is avoided that in addition to killing germs, oxygen is also converted into ozone, which attacks the mucous membranes in humans.

Ideally, the radiation source should emit UV light at 254 nm.

Since the wavelength of the UV light emitted by the UV light source - mostly fluorescent tubes - is in the visible range, a non-transparent, preferably flat, cover of the light source is preferably provided towards the room, preferably the light source in a peripherally closed one flow channel, which is only open on the two front sides, so that the blue UV light does not disturb people when they are working in this room.

In order to create a large effective area, several of the fluorescent tubes or the other UV light sources are arranged along the flow path of the room air or transversely thereto, which in particular form a plane which is arranged parallel to the plane of the flat cover, whereby this instead of one Level can also be a curved surface in each case.

In this case, the cover can already be part of the guide device, that is to say, for example, can represent a wall of a flow channel.

Preferably, the flat cover should be optically freely designable in order to be able to adapt it to the design or the purpose of the room in question. The air flow is thus preferably guided along the back of the flat cover, which can be mounted in particular at a distance from the wall or ceiling of the room and the fan and the other components of the disinfection device can also be accommodated at this distance.

In particular, the air flow should be guided in such a way that it does not penetrate the cover—even if it consists of an air-permeable material such as a textile material—to avoid the risk of germs then accumulating and accumulating on the cover penetrated by the air.

For the same reason, the boundary walls of the flow channel - if there are any and form a physically limited flow channel - should be as smooth as possible and easy to clean, in particular disinfectable by periodic strong heating.

The disinfection device preferably includes an air quality sensor that measures at least one quality parameter of the room air and makes it available to the controller.

The quality parameter can be the CO ₂ content and/or the VOC content and/or the humidity and/or the temperature of the room air. The air quality sensor can be built into the disinfection device or it can be a separate unit that can be mounted remote from the actual disinfection device in a location that is more representative of the overall air quality in the room than directly on the disinfection device.

In this case, the sensor and the controller of the disinfection device, which is preferably located in its main housing, are in data-technical connection, preferably contactless, for example via radio. This greatly simplifies the assembly of the disinfection device.

Especially when the basic loading of the air with which the room was originally flooded, for example the outside air after the room has been ventilated for a sufficiently long time, is known and is measured as an initial value using the VOC sensor, the increasing VOC concentration after people have entered Content also represent an indication of the increasing germ load and are used, for example, to control the disinfection device, in particular its activation.

The monitored air quality parameter, for example the CO2 content, can also be displayed optically, for example by means of corresponding traffic light colors such as orange for a critical value and red for a value that is too poor, which is indicated, for example, by a corresponding color from the controller or the air quality sensor switchable backlighting of the cover of the radiation disinfection device can be displayed

In order to ensure that the disinfection device is also working properly - which is not possible solely based on the emission of visible blue light, since this should not be visible to the users of the room - a monitoring device for the UV radiation source UV light source is preferably used present, which is coupled to the controller and, for example, measures the operating current with which the UV light source is operated. If this drops or approaches zero, the controller concludes that either the only UV light source or one of several UV light sources in the disinfection device is not working and needs to be replaced and emits a corresponding, in particular visual or acoustic, warning signal, either directly on the disinfection device or preferably a wireless warning signal to a higher-level control center.

A monitoring device for the fan should preferably also be available, because when the room air is standing still around the UV light source, no significant killing of germs takes place. Here too, for example, the operating current of the mostly electrically operated fan can be monitored and, as explained above, a warning signal can be emitted if the operating current is too low or tends towards zero.

For example, the disinfection device can have a controllable yellow and/or red illumination, for example background illumination, as an optical alarm signal, which can be understood by everyone in the sense of a traffic light as an optical warning.

If there are several disinfection devices in the room, the visual warning on only one disinfection device can mean that there is a malfunction in this individual disinfection device, whether it is the radiation source or the fan.

If the yellow and/or red lighting on all existing disinfection devices is activated at the same time, this will be interpreted in such a way that at least one of the measured quality parameters is too poor with regard to the room air, e.g. the CO2 content or the VOC load is too high, in order to then ventilate the room either automatically or manually.

• Es kann sich dabei im einfachsten Fall um einen manuell zu betätigenden, direkt am Desinfektionsgerät vorgesehenen, Einschalter handeln.
• Es kann sich jedoch auch oder ergänzend ein Funkschalter vorhanden sein, sodass man aus der Entfernung das Desinfektionsgerät einschalten und auch ausschalten kann, wobei das entsprechende Signal entweder von einer übergeordneten Leitstelle oder auch lediglich von einem vom Desinfektionsgerät entfernten, manuell zu betätigenden Einschalter kommen kann.

The switch-on device of the disinfection device can be designed in different ways:

• In the simplest case, this can be an on/off switch that can be actuated manually and is provided directly on the disinfection device.
• However, a wireless switch can also or additionally be present, so that the disinfection device can be switched on and off from a distance, whereby the corresponding signal can come either from a higher-level control center or simply from a manually operated switch that is remote from the disinfection device.

For example, such an on/off switch can be located on the speaker's lectern in a lecture room or on the front door like a light switch to make it easier for users or facility staff to switch on the disinfection device, especially if it is in a room - which is often the case - several disinfection devices are distributed in the room, which can then be switched on with a central switch.

However, the on switch for the radiation disinfection device can also be actuated wirelessly from a remote entrance device located at the entrance, for example if its camera detects a person entering the room or the local dispenser for disinfectant is activated or a motion detector acting in the entrance area is activated .

An adjustable performance, usually speed, of the fan only makes sense if you should be able to set the disinfection devices to different dwell times, which only makes sense for the destruction of very different germs that require very different dwell times in the effective range of the radiation source.

The switch-on device can also include a motion detector, which can be present on or in the housing of the disinfection device or near the entrance door to the room in question and is wirelessly connected to the individual or multiple disinfection devices, so that when the first person enters the room the disinfection device or devices are activated.

The same effect can be achieved with a gate switch, for example a switch that registers when the front door is opened.

At the same time, both can also function as counters to count the number of people entering the room and also to emit an alarm signal if a specified limit number is exceeded.

The disinfection device can also include an air humidifier or air dehumidifier in order to keep the air humidity in the room within a target range, since it is known that the survival time of germs in the air is particularly short when the air humidity is too low, but also when it is too high humidity can increase drastically compared to humidity levels between about 40% and 60% relative humidity.

Such an air humidifier and/or air dehumidifier can in turn be integrated into the rest of the disinfection device with radiation source and fan, but preferably set up separately from them, then have their own control which is signaled, preferably wirelessly, with the control of the disinfection device is coupled.

In the simplest case, the air humidifier and/or air dehumidifier, preferably both functions are combined in a single device, can be and be operated completely independently, including signal-wise, of the disinfection device.

The controller of the disinfection device is preferably designed in such a way that it is also able to control drives that do not belong to the disinfection device, for example a motor-driven window opener, in order to automatically ensure ventilation of the room if the measured CO2 content is too high.

The main advantage of the disinfection device is that it does not contain an air filter. Nevertheless, the controller can be designed to control such an air filter, in particular a mobile one.

According to the invention, an air cleaning system for removing germs in the room air comprises at least one radiation disinfection device.

• Beispielsweise ein speziell ausgebildetes und sich von den übrigen Desinfektionsgeräten unterscheidendes Sprecher-Desinfektionsgerät, welches zum Beispiel in einem Schulungsraum am Tisch des Sprechers montiert werden kann:
  • Dieses umfasst vorzugsweise eine durchsichtige Spritzschutz-Wand aus weder für Gase noch Aerosole noch Feststoffe durchlässigen Material, insbesondere aus Plexiglas, die zwischen dem Sprecher und seinem Publikum montiert werden kann, insbesondere unmittelbar vor dem Sprecher.

However, the system also includes other components that are preferably not housed in the housing of the disinfection device, but are separate components that can be connected to the disinfection device in terms of signals:

• For example, a specially designed speaker disinfection device that differs from the other disinfection devices, which can be mounted on the speaker’s table in a training room, for example:
  • This preferably comprises a transparent splash protection wall made of material that is not permeable to gases, aerosols or solids, in particular Plexiglas, which can be installed between the speaker and his audience, in particular directly in front of the speaker.

The radiation source of such a speaker disinfection device is then located on the speaker side or under the splash guard wall or embedded in its lower area, since germs float in the air but tend to sink and thus increasingly reach the area of the radiation source.

In addition, there is also a fan here, which directs an air flow from the speaker, e.g. in the direction of the audience, but through the effective area of the radiation source, preferably only through the effective area of the radiation source, i.e. with a flow channel closed on the circumference, in which preferably also the Radiation source is located and the cross section of the flow channel is not larger than the cross section of the effective range of the radiation source therein.

Openings for reaching through can also be present in the splash protection wall, for example for use in a sales room or a doctor's surgery, so that the respective person can reach through the openings in order to carry out an activity on the other side, for example an EC to operate the card terminal.

Values of the measured air quality can also be displayed on the spray protection wall or a traffic light statement can be made using appropriate lighting.

Another component could be a motorized window opener that can be controlled by the controller of the disinfection device or the air purification system.

A "filter tower", i.e. a mobile air filter with a germ filter, could be another component in the room or outside, which is so called because of the mostly upright construction, whereby this term should not limit the mobile air filter to this tower shape. Preferably, the filter tower has wheels so that it can be pushed to any location and set up there, and only requires a power supply, i.e. usually a socket, nearby for its operation.

The room air in the filter tower does not necessarily have to be routed over the germ filter, but can also be routed past it by means of a switch, for example if the room air is not to be filtered but only heated or cooled during the circulation of the room air.

The filter tower has an air intake opening and an air discharge opening, with the air intake opening preferably being located close to the ground, since the germs sink when the air is still, which is why the air intake opening is preferably at a height of no more than 1 m, preferably no more than 50 cm , preferably no more than 30 cm above the floor.

In order to achieve good circulation, the air discharge opening to the room is arranged in the upper area, in particular in the upper third, of the filter tower, in particular at a height of at least 1.3 m, preferably at least 1.5 m.

The germ filter is preferably equipped with a filter control device that monitors whether it is necessary to change the germ filter. For this purpose, either the germ load of the filter can be monitored and/or the operating time, possibly coupled with the flow rate of the air and/or the drive power of the fan in the filter tower, which causes the air flow through the germ filter, monitored and recorded and From this, the maximum permissible operating time and thus the change time can be determined.

Furthermore, the control of the filter tower should be able to indicate when, after a certain waiting period after the end of the filter operation, the germ filter is no longer infectious and can be changed, which can be done in particular by releasing the filter housing lock, after which the filter can be removed from the filter housing.

The filter tower preferably also has a monitor, in particular on its front side. Behavior specifications can be displayed thereon and/or the air quality parameters that have been determined by air quality sensors coupled to the filter tower or contained therein.

The filter tower can also have a dispenser for disinfectants, preferably with a non-contact trigger sensor.

According to the invention, the air cleaning system also has an entrance device, which is provided for installation at the entrance, in particular the entrance door, of the room in which the room air is to be cleaned.

For this purpose, the entrance device includes a camera, for example, which the controller can use to visually check whether people walking past the entrance device - which means that these people enter the room if set up appropriately - are wearing a mouth and nose mask and/or have operated the dispenser for disinfectant, in particular have actually cleaned their hands with the disinfectant.

For the same reason, the input device according to the invention comprises a temperature sensor that works at a distance, which is arranged in particular at head height, a pyrometer or a thermal imaging camera with which the surface temperature of people passing by is automatically measured and if the surfaces are too high -Temperature an alarm signal is given.

The alarm signal can also be displayed visually on the monitor of the input device, if one is available.

If such an entrance device is placed, for example, in the corridor from which the entrance door branches off into the room, the entrance device can perform the same functions after the completion of admission into the room for people walking along the corridor, and also in this regard Give alarm signal if necessary.

The entrance device can be height-adjustable, so that it can also be used with children in a kindergarten, for example.

With regard to the entry into the room, the entrance device and in particular its camera together with the controller are also called Per Sonen counter is used to count how many people are already in the room and, at a preset maximum number, to sound an alarm when this maximum number is reached.

If either the multiple disinfection devices in a room and/or the individual, in particular associated, further components each have a control, either one of them functions as a master control or all controls are provided by a higher-level control center, in particular in a remote control center , Central control, which, however, also receives measurement signals from the sensors that are present on or in the individual components, in particular the disinfection devices, or sensors that are freely mounted in the room away from them.

With regard to the air purification system, each radiation disinfection device and/or each filter tower and/or each input device usually has its own control for, for example, evaluating the data from the air quality sensors and in particular for displaying them on the monitor or for wireless Forwarding to a higher control center.

For this purpose, such a controller can have a SIM card connection in order to maintain contact with the control center via a standard mobile phone network and/or WLAN available at the place of use.

An epidemic warning app, for example the Corona-Warn-App, is preferably also installed on such a controller, so that if the epidemic occurs more frequently, certain functions of the air purification system can be controlled differently from the control center and/or time current air quality parameters can be queried.

The devices of the air cleaning system, in particular the radiation disinfection device and/or the filter tower and/or the input device and/or the speaker device, in particular their monitors, preferably have a self-disinfecting surface or a self-cleaning device which then automatically cleaned by the controller at times to be determined by the controller.

Likewise, one of these devices of the air purification system can have a sterilization box for inserting and sterilizing objects, with no disinfecting liquid being used for disinfecting, but preferably again a radiation source for example UV light. Cell phones or credit cards, for example, can be placed in it and sterilized, even while a cell phone is charging, if the sterilization box has at least one charging connection.

Depending on which of the devices also has a monitor and an operating unit, the air quality of all rooms monitored by the system can be displayed on the monitor, so that if the air quality is insufficient, measures can be taken not only automatically but also manually.

When used in a school, a disinfection box - no matter what device it is trained on - can also be used to ensure that the students place all their mobile phones in it during class, which are then disinfected there at the same time as they are stored safely.

With regard to the method for operating the germ removal system, it is first of all ensured with the disinfection device that the room air is transported so slowly through the effective range of the radiation source that the individual components of the room air or the components transported therein in particular germs via a spend a sufficiently long residence time to destroy the germs in the effective area.

If the disinfection device or the system includes a volatile organic compound = VOC sensor - which measures organic components floating freely in the room air - a VOC limit value - which can be set in particular automatically as a function of a freshly ventilated VOC initial value - is preferably used - an alarm signal is given and/or the room is automatically ventilated with fresh air and/or an air filter with germ filter that may also be in the room is activated, i.e. the room air is circulated through the germ filter.

The same can happen automatically if the CO2 sensor detects a value above a specified limit.

This can be done in particular as a function of the room temperature measured by a temperature sensor, i.e. when the room temperature is already low below a limit value, instead of ventilating the room with outside air, the room air is circulated and thereby heated, whereby it can also be circulated through the germ filter.

The CO2 and/or VOC content and/or the air humidity are preferably determined as air quality parameters, with this preferably being carried out at several points in the room and in particular away from one of the other devices in the room Air purification system takes place, especially in the central area of the room, both viewed from above and/or in height.

The measured values can be reported to the higher-level control center or the master controller and/or communicated to the immediate environment, for example displayed on a monitor, which is part of one of the devices of the air purification system.

If the disinfection device or the system includes a humidity sensor, if the humidity is too high or too low outside of a defined target range, an alarm signal is emitted and/or an existing air humidifier and/or air dehumidifier is automatically activated and/or the Room automatically flooded with outside air by controlling a motorized and controllable window opener.

Using one of the cameras on one of the devices of the air purification system, the wearing of the mouth-nose mask by the individual person can be checked, and if this is not only on the entrance device, but also on the disinfection device or the speaker device and these are mounted high enough, this can result in permanent monitoring with regard to wearing mouth and nose protection in the room throughout the event.

If this check is carried out at the entrance to the room, the number of people entering the room is counted at the same time.

Using a non-contact, remote temperature sensor, in particular a thermal imaging camera, the surface temperature of people is determined at least at the entrance to the room, preferably also afterwards when the people are already in the room, and an alarm signal is given if the temperature is too high delivered.

The ambient temperature, for example the temperature of the room air, can also be taken into account.

In particular, outside the disinfection times, the components present in the air purification system can also serve other purposes, for example the room can be monitored for burglary or fire by means of the camera, for which a motion detector should preferably also be present.

Video conferences can also be carried out via the monitor - with sufficient IT hardware and at least one microphone on or in the air purification system.

In a school, for example, the face-to-face lessons held in a classroom can be made accessible online for other students using the components of the air purification system.

In the event of a corona outbreak at the respective location, the control of the air purification system and/or all of its devices can preferably be controlled from a higher-level body in such a way that all systems are controlled in the direction of maximum cleaning power or maximum reduction of the germ load in the room air For example, the air in the room is not only disinfected and filtered by radiation, but also the window opening is adjusted to be fully open and the fans in the room on the devices are set to maximum power in order to generate strong air movement in the room and thus improve the to achieve ventilation effect of the open windows.

In addition, an entry device or a monitor at the entrance to the building can be used to indicate that no people are allowed to enter the building.

character list

• 1a, b: ein Strahlungs-Desinfektionsgerät in zwei verschiedenen Seitenansichten,
• 2: einen zu reinigenden Raum mit darin vorhandenem Luftreinigungs-System, welches Strahlungs-Desinfektionsgeräte umfasst,
• 3a, b: eine Desinfektion-Röhre im Längsschnitt und in Stirn-Ansicht,
• 4a: einen Filter-Turm in der Frontansicht,
• 4b: den Filter-Turm mit der Frontansicht der 1a in einer ersten, einfachen Bauform aufgeschnitten in der Seitenansicht,
• 4c: den Filter-Turm mit der Frontansicht der 1a in einer zweiten, aufwändigeren Bauform aufgeschnitten in der Seitenansicht.

Embodiments according to the invention or components thereof are described in more detail below by way of example. Show it:

• 1a, b : a radiation disinfection device in two different side views,
• 2 : a room to be cleaned with an air cleaning system in place that includes radiation disinfection devices,
• 3a, b : a disinfection tube in longitudinal section and in forehead view,
• 4a : a filter tower in the front view,
• 4b : the filter tower with the front view of the 1a in a first, simple design cut open in the side view,
• 4c : the filter tower with the front view of the 1a in a second, more complex design, cut open in the side view.

• Wie am besten die teilweise perspektivische Darstellung der 1a erkennen lässt, umfasst das Strahlungs-Desinfektionsgerät 60 zunächst eine frontseitige, vordere Abdeckung 65, die hier rechteckig ist, und mit Hilfe eines Grundgestells 62, welches sich nach hinten an die Abdeckung 65 anschließt, im Abstand zu einer Wand W montiert werden kann. Die funktionalen Bestandteile des Strahlungs-Desinfektionsgerätes befinden sich im Abstand zwischen der Abdeckung 65 und der Wand W.

Since the function of the individual components of the radiation disinfection device has been sufficiently explained above, the following is based on the 1a, b and 3a, b only their arrangement and design briefly described:

• How best the partial perspective view of the 1a can be seen includes the radiation disinfection device 60 first has a front cover 65, which is rectangular here, and can be mounted at a distance from a wall W with the aid of a base frame 62, which connects to the cover 65 at the rear. The functional components of the radiation disinfection device are located in the space between the cover 65 and the wall W.

The cover 65 is in the 1a, b shown as a surrounding frame 65a, which can be made appealing to the front by a covering 65b, such as an image printed on flexible material.

The base frame 62 is fastened to the frame, which can simultaneously fulfill the function of a guide device 62 by having a rear wall 62a in this viewing direction - i.e. viewed in the direction of flow 62' - with which it can be fastened to the wall W and on both sides, mutually opposite end edges, a side wall 62b in each case aspires to the adjacent outer edge of the cover 65, here the corresponding part of the frame 65a, and is fastened thereto.

A flow channel 62" is thus enclosed by the rear wall 62a, side walls 62b and the front cover 65, through which ambient air flows in the direction of flow 62` by means of a preferably rotating fan 61 with air guide vanes - whose axis of rotation 61' also runs in the direction of flow 62' is transported through the flow channel 62". The fan 61 is held on a cross brace 62c of the base frame 62, which can brace forwards from the rear wall 62a to the fan 61.

The disinfection of the air flowing through is effected by a radiation source 66, here in the form of a plurality of UV fluorescent tubes arranged parallel to one another, which emit ultraviolet light with a wavelength which kills germs, such as about 243 nm. These tubes 66 are arranged here with their main direction of extension running transversely to the direction of flow 62', which, however, is completely irrelevant for the function, so that they can also run in the direction of flow 62'.

The tubes 66 are each fastened at their two ends to a longitudinal strut 62d, via which the tubes 66 are supplied with electricity. The longitudinal struts 62d run transversely to the direction of extension of the tubes 66, but with their main direction of extension parallel to a tube plane 66", which is defined by the longitudinal center axes of the tubes 66, and which is also on the base frame 62, here the frame 65a of the cover 65 - the is usually part of the base frame 62 - is attached.

The controller 60* of the radiation disinfection device 60, which preferably includes a monitoring device 63 for the function of the tubes 66 and a monitoring device 64 for the function of the fan 61, is only shown symbolically - each of which monitors the operating current of these parts, and can also include a transceiver unit 6, with which the switch-on device of the controller 60* can be switched on wirelessly, for example by means of a hand-held transmitter with a signal transmitter 67.

Instead of an active switch, the radiation disinfection devices 60 can also be activated by means of a motion detector 12, which is either present on one or more of the radiation disinfection devices 60 and directed into the room and/or on the entrance device 90 and/or separately in the room , for example in the upper corners of the room.

The controllers 60* of the radiation disinfection devices 60 or a higher-level controller 100* of an air purification system 100 should be able to control the motor-operated and controllable window openers 101 of the windows F in the room R towards the environment U, so that these Windows F can be opened automatically for a while and the room is ventilated.

2 shows a room R viewed from above - in this case a classroom with a teacher's desk and student seats - in which the room air RL is to be freed of germs using preferably several such radiation disinfection devices 60 or at least the germ load in the air - ideally without Exchange of the room air for the outside air of the environment - the germ load should be kept below a given threshold value.

For this purpose, several such radiation disinfection devices 60 are attached along the walls of the room, at about head height, either with the direction of flow 62` along a wall horizontal and always directed in the same direction, or with the direction of flow directed vertically from bottom to top due to the fact that the viruses sink to the bottom when the room air is still, and therefore many germs can be detected and killed, especially when the air purification system 100, which includes at least these radiation disinfection devices 60, is switched on.

One or more of the radiation disinfection devices 60 can also be mounted under the ceiling of the room.

The main advantage of these disinfection devices 60 is that the fans 61 contained therein work almost silently due to their low power and do not interfere with the lesson either.

• Zum einen ein Sprecher-Desinfektionsgerät 70, welches am Lehrerpult montiert aufgestellt ist und für den Fall eines infizierten Sprechers oder Lehrers die in seinem Atem enthaltenen Keime abfangen und desinfizieren soll.

In addition, such an air purification system can include 100 additional components:

• On the one hand, a speaker disinfection device 70, which is mounted on the teacher's desk and is intended to intercept and disinfect the germs contained in his breath in the event of an infected speaker or teacher.

Such a speaker disinfection device 70 comprises, on the one hand, a splash protection plate 71 made of transparent material, which stands on the teacher's desk as a splash protection barrier between the teacher, in particular his head, and the students. Underneath or in its lower area runs a disinfection tube 72 aligned from the teacher towards the student, in that the same functional components are located as in the radiation disinfection device 60, with the direction of flow preferably away from the teacher and towards the students.

• Wie der Name bereits sagt, wird das Grundgestell 74 der Desinfektions-Röhre 72 durch einen Rohrstutzen 74 gebildet, der zum Abstellen auf dem Untergrund im vorderen und hinteren Bereich Stützfüße, beispielsweise in Form einer äußeren Tragplatte 75, aufweist, mit der die Röhre 74 sicher auf dem Untergrund wie einem Lehrerpult abgestellt werden kann.

The 3a, b show such a disinfection tube 72 in longitudinal section and looking into one of the two open ends:

• As the name already suggests, the base frame 74 of the disinfection tube 72 is formed by a tube socket 74, which has support feet, for example in the form of an outer support plate 75, with which the tube 74 can be placed on the ground in the front and rear area can be placed on the ground like a teacher's desk.

A UV fluorescent tube 66 runs inside the tube--preferably extending in its longitudinal direction--then preferably arranged on the longitudinal axis of the tube socket 74, or one or more UV fluorescent tubes 66 distributed over the circumference off-centre close to the tube socket 74.

A fan 61 is also arranged on the central axis, if necessary in the longitudinal direction in front of or behind the central UV fluorescent tube 66, which essentially fills the entire inner free cross section of the pipe socket 74 and is attached to a cross brace 73 running transversely through the inner free cross section is stored.

In order to avoid injuries, a protective plate (not shown) can be provided on the side of the fan 61 towards the front opening, offset in front of it, which leaves a ring-shaped intake opening or outlet opening for the room air opposite the inner circumference of the pipe socket 74, which, however, is too narrow to put a finger through. Instead of such a protective plate, there can also be a protective grid with a correspondingly small mesh size, but this does not prevent the blue light from the UV fluorescent tube 66 from being visible from the outside.

The air purification system 100 as in 2 shown, according to the invention also includes an input device 90:

Such an entrance device 90 includes, for example, a dispenser 4 for disinfectant so that the people entering can disinfect their hands. Furthermore, according to the invention, an automatic temperature measurement is carried out on the person entering, either by means of a thermal imaging camera 27 or by means of a separate temperature sensor 11 acting at a distance, which can be part of the entry device 90 .

The controller 90* contained in the device should also be able to automatically check with the aid of a camera 10, which can possibly also be the thermal imaging camera 27 at the same time, whether the people passing through the device 90, i.e. entering the room R, have a mouth and nose -Wear a mask MNM.

Separate cameras 10 and/or thermal imaging cameras 27 can also be present in room R, but this increases the installation effort, which is why it makes sense to arrange such components in one of the devices of the air purification system 100 .

• Falls ein solcher Filterturm 50 außerhalb des Raumes R an dessen Außenwand zur Umgebung U hin steht und über Luft-Leitungen 23 mit der Raumluft, also dem Inneren des Raumes, verbunden ist, wird dadurch natürlich die Geräuschbelastung im Raum R reduziert.

Another device that can be part of the air purification system 100 could be a mobile filter tower 50, which circulates the room air in the room and thereby directs it through a germ filter, which greatly reduces the germ load, but because of the very close-meshed germ filter it is strong and therefore not requires very quiet blower or fan 15. Such a filter tower 50 can be arranged inside the room R, with the disadvantage mentioned, or outside of the room R and still improve the room air:

• If such a filter tower 50 is outside of the room R on its outer wall to the environment U and is connected to the room air, ie the interior of the room, via air lines 23, the noise level in the room R is of course reduced.

In addition, there is the possibility that the room air RL is exchanged for outside air AL by means of such a filter tower 50 - whereby the room air RL is of course preferably not passed through the germ filter - which has the advantage that the air exchange takes place via a heat exchanger in the filter tower 50 and as a result, the supplied outside air AL is preheated in contrast to ventilation by simply opening the window F.

Instead of connecting the filter tower 50 to the interior via air lines 23, which run through holes in the outer wall of the room R, it is also possible to fix one of the windows F in a slightly open state, and the resulting small window opening through suitable covers or adapters are to be closed as far as possible except for openings for the exiting room air RL and the entering outside air AL, which are connected via air lines 23 to a filter tower 50 that is preferably located in the vicinity of this open window.

Such a filter tower 50 can also be placed outside the room R connected to the interior of the room, but inside the building, for example in a corridor G in the building which runs alongside the room R.

By means of several existing air intake openings 17 and/or air discharge openings 18 in the filter tower 50, which can be switched in a controlled manner, it is possible to switch from sterilizing the room air RL to sterilizing the air at the installation site of the filter tower 50, e.g. the corridor G.

In addition, such a filter tower 50 can have a humidity regulator 69, in particular an air humidifier 69a and/or an air dehumidifier 69b, in order to keep the air humidity in a target range of about 40 - 60% absolute or relative air humidity, in which the survival time of Viruses is less than above and below, especially below, the target range.

• In der Frontansicht der 4a sind die für einen Passanten P, der in diesem Fall teilweise vor dem Filter-Turm 50 steht, wichtigen Elemente zu erkennen:
  • Der Filter-Turm 50 ist in diesem Fall etwa mannshoch, besitzt in diesem Fall - wie in 2 ersichtlich - die Form eines aufrecht stehenden Kubus mit Rollen 29 an der Unterseite, so dass er leicht an die gewünschte Position verfahren werden kann.

Exemplary embodiments of such a filter tower 50 is in the 4a until c shown:

• In the front view of the 4a the elements that are important for a passer-by P, who in this case is partially standing in front of the filter tower 50, can be seen:
  • The filter tower 50 is about man-high in this case, has in this case - as in 2 seen - the shape of an upright cube with rollers 29 at the bottom so that it can be easily moved to the desired position.

Approximately at the level of the hands of a person P standing in front, there is a dispenser 4 for disinfectant in the center of the front, so that a person P can easily place their hands under the outlet opening 4c, as shown, whereupon, by means of a trigger sensor 4a, which places the hands in detected by its detection area, a portion of the disinfectant is discharged downwards from the outlet opening 4c.

The space below the exhaust port 4c is formed as a recess in the front of the case.

As in 4c As can be seen, a level sensor 4b is arranged on the reservoir for the disinfectant, which reports to the controller 50* of the filter tower 50 when the disinfectant is running low.

A screen 2, preferably a touch-sensitive screen 2, is arranged above the dispenser 4 on the front side of the filter tower 50, on which information, from warnings to air parameters, rules of conduct or advertising can be displayed, with the accompanying - or also separate - acoustic playback a speaker 5, preferably also in the front, is available.

What is important in this case, however, are the several air quality sensors 1 that are either arranged apart from the filter tower 50 in the room to be monitored, in particular mobile ones, and/or, as shown, on the outer surfaces of the filter tower 50, which are located both in the lower area and in the upper area of the filter tower 50, preferably on different sides and/or in the corners of the housing of the filter tower 50.

These are connected to the controller 50*, which can show these values, among other things, on the display 2 and/or can forward them to a higher-level control center 100*, for example of the air purification system 100, via a transmitter/receiver unit 6.

• Insbesondere in der Frontfläche kann ferner ein Temperatur-Sensor 11.1 vorhanden sein, vorzugsweise in einer solchen Höhe und an einer solchen Stelle, dass er am Kopf einer Person P, die sich gerade die Hände unter dem Spender 4 desinfiziert, automatisch dessen Oberflächen-Temperatur messen kann.

Already the previously based on the 4 The scope of modules described represents the simplest design of the filter tower 50. More extensive designs contain the additional modules described below:

• A temperature sensor 11.1 can also be present in particular in the front surface, preferably at such a height and at such a location that it automatically measures the surface temperature of the head of a person P who is just disinfecting his hands under the dispenser 4 can.

In order to hit the spot correctly, there is also a camera 10--preferably adjacent to such a temperature sensor 11.1--which determines the position of the head of person P and thereby controls 50* with the temperature sensor--which can be controlled in particular with regard to its measuring direction. Sensor 11.1 aims at the head, especially at the forehead.

The camera 10 can also be used to automatically determine whether this person P is also wearing a mouth and nose mask MNM.

A further temperature sensor 11.2 is preferably present, which measures the temperature of the air around this sensor, it being possible for the two temperature sensors 11.1, 11.2 to be functionally combined.

In this case, the unit consisting of temperature sensor 11.1 and camera 10 is only shown on one side of display 2, but can preferably be present on both sides of monitor 2, since dispenser 4 is located approximately in the middle of the housing of tower 50 in the width direction, see above that a person P can approach from both sides.

In the front surface is also - also designed as a recess - a sterilization box 3 arranged, in this case two on top of each other, in each of which a small object such as a mobile phone H can be inserted and irradiated with a radiation source 3b arranged in the periphery of this compartment with UV light - such as a UV fluorescent tube 66 - is applied for a sufficiently long time to disinfect this object, triggered by a trigger sensor 3a.

In this case, each compartment has an intermediate floor in the form of a thin lattice with large lattice cavities, on which the object can be placed, so that irradiation can take place not only from above but also from below, which can also be done by means of reflection of the radiation coming from above is possible on the peripheral walls and the bottom of the compartment.

The front side also shows the issuing slot of a ticket generator 32, through which an access ticket T for certain rooms or building areas or the entire building can be issued to the person P, and also a ticket transmission unit T*, for example in Can have the form of an RFID tag, via which information can be read out wirelessly from the ticket T, for example by a ticket reader, and possibly also sent.

In addition, at one or more points in the outer surfaces of the filter tower 50 there can be people counters 8 with which the number of people P passing through the tower 50 within a maximum detection distance is recorded.

4a also shows an optional battery 7a in the lower area of the tower 50, in which electricity can either be stored on the solar cells 7b arranged on the top of the tower 50, or by means of the electric cable 28 leading out of the housing of the tower 50 with a plug on a normal Socket can be recharged.

• 4b zeigt diesbezüglich eine erste, einfache Ausbaustufe:
  • Dabei befindet sich im Boden des Gehäuses des Filter-Turmes 50 eine, vorzugsweise großflächige, Luft-Ansaugöffnung 17, über die Raumluft RL eingesaugt wird mittels eines Unterdruck-Erzeugers wie eines Gebläses 15 und im Gehäuse nach oben transportiert wird, zunächst durch einen Keim-Filter 20, der mehr als 99 % aller in der hindurchgeführten Luft enthaltenen Keime festhält, und im weiteren Verlauf über einen Geruchs-Filter 21, der Stoffe und Partikel ausfiltert, die unangenehme Gerüche verursachen.

The representations of 4b, c show above all the optional elements for air treatment inside the housing of the filter tower 50:

• 4b shows a first, simple expansion stage in this regard:
  • In the bottom of the housing of the filter tower 50 there is a preferably large-area air intake opening 17, via which the room air RL is sucked in by means of a negative pressure generator such as a blower 15 and is transported upwards in the housing, initially by a germ Filter 20, which retains more than 99% of all germs contained in the air passed through, and further on an odor filter 21, which filters out substances and particles that cause unpleasant odors.

At least the germ filter 20, preferably both filters 20, 21, are equipped with a filter control device 16, which reports to the controller when the capacity of the respective filter 20, 21 is exhausted and it needs to be changed.

The room air RL filtered in this way is released back into the room R via an air outlet opening 18, which is preferably located in the upper side of the housing.

A heating device 13 and/or a cooling device 14 for the air flowing through the filter tower can also be arranged in the flow path, which can also include connections for an externally supplied warm and/or cold heat transfer medium. A simple form of heating device can also be operated purely electrically.

Furthermore, an air dehumidifier 69b for the room air to be treated RL may be present, preferably upstream of the first filter 20, 21 to be flown through, with of course first by means a moisture sensor 31, the humidity of the air entering the filter tower 50 must be determined.

An air humidifier 69a can be present downstream of the last filter in order to humidify the air flowing through when the moisture content is too low.

Optionally, a battery 7a for electricity can also be present in the housing of the filter tower 50, which serves in particular as a buffer battery if, despite the connection of the filter tower 50 to the local power grid, there is no external power supply for a short time due to a power failure.

• In Blickrichtung der Figur befindet sich in der rechten Seitenwand des Gehäuses im unteren Bereich eine - relativ großflächige - Luft-Ansaugöffnung 17 und in der gegenüberliegenden Seitenwand etwa auf gleicher Höhe und mit etwa gleicher Größe eine Luft-Abgabeöffnung 18.

4c shows a second expansion stage, which is more extensive in terms of air treatment:

• In the viewing direction of the figure, there is a relatively large air intake opening 17 in the lower area of the right-hand side wall of the housing and an air discharge opening 18 in the opposite side wall at approximately the same height and with approximately the same size.

Both are connected via an air line 23c, and a germ filter 20 is arranged on the flow path immediately after the air intake opening 17, which largely frees the sucked-in room air RL of germs, and in the further flow path an odor filter 21, mostly an activated carbon filter 21.

In the upper, preferably the uppermost, area of the housing there is at least one opening in the housing that can be used optionally as a suction or discharge opening 17, 18, in this case shown once in the top and once almost at the highest point of a side wall, of which one can be closed by a switchable switching flap.

A common air line leads from both - the air lines coming from the openings 17, 18 unite within the housing after a short distance - via an air line 23e, in which a blower 15 is arranged, into the housing of the germ filter 20 and opens out upstream of the Germ filter 20. An air line 23a, which leads directly to the air discharge opening 18, branches off from this via a switch in the form of a switching flap 19a.

From this air line 23a - in which there is in turn a fan 15 - branches off a lockable air line 23b via a second switching flap 19b, which opens into the air line 23c between the two filters 20, 21, and the opening of which also has a switch 19c there can be opened or closed in the form of a switching flap.

Another short air line 23b connects the two air lines 23c and 23a, which are the inlets upstream and downstream to the activated carbon filter 21.

Both filters 20, 21 are each equipped with a filter control device 16, which monitors the loading and thus the functionality of the respective filter and reports to the controller 50* of the filter tower 50 if a change is necessary.

• So kann Raumluft RL im Raum R, in dem sich der Filter-Turm 50 befindet, umgewälzt werden und dabei nach Wunsch behandelt werden:
  • Entweder bei Ansaugen über die Luft-Ansaugöffnung 17 kann die Raumluft RL zunächst über den Keimfilter 20 und danach über den Geruchsfilter 21 geführt werden, und über die tief liegenden Luft-Abgabeöffnung 18 wieder in den Raum R hinein abgegeben werden.

Since the direction of rotation of the fans 15 can also be switched using the controller 50*, which can also control all switching flaps, very different air ducts can be implemented:

• Room air RL can be circulated in room R, in which the filter tower 50 is located, and treated as desired:
  • The room air RL can first be passed through the germ filter 20 and then through the odor filter 21 when it is sucked in via the air intake opening 17 and then discharged back into the room R via the low-lying air discharge opening 18 .

A suction through one of the high-lying openings 17/18 is rarely carried out, since the germ load in the lower layers of air above the ground is usually higher than in the higher layers of air.

If routing via the odor filter 21 is not necessary, the air can be routed past this to the air discharge opening 18 as a bypass via the air line 23d and correspondingly opened switching flaps 19d, 19b.

If room air is nevertheless to be sucked in via the high-lying opening 17/18, it can also be routed via the air line 23e first via the germ filter 20 and then optionally also via the odor filter 21 and via the low-lying air discharge opening 18 into the room R are given.

From one of the high-lying openings 17/18, however, the air can also be routed directly to the air discharge opening 18 and either not routed through a filter but directly to the air discharge opening 18 or by using the air line 23b with appropriately switched switching flaps 19b, 19c, 19e are only passed over the odor filter 21.

Since at least in the air line 23a and / or in the air line 23e an additional heating and / or Cooling device 13/14 is present - which can have a connection for a supplied heating or cooling medium in preferably liquid form instead of being operated only electrically - air can also be temperature-controlled via this corresponding air line as desired.

This is especially necessary when one of the two high-lying openings 17/18 has a connection for outside air AL, which can be too cold in winter and too warm in summer for use in room R, and before delivery to room R above the air discharge opening 18 is only to be tempered.

Instead of ventilating the room R with this outside air, room air RL can be sucked in via the air suction opening 17 and discharged to the environment via the air line 23e and the suction/discharge opening 17/18 connected to the outside air AL, and thereby the room be freed from germ-laden air, which of course does not have to be passed through filters 20, 21 beforehand, which can be bypassed via the corresponding air line 23e.

Since with an appropriate connection, especially the two high-lying air openings 17/18, aeration and venting can be carried out simultaneously, the corresponding air lines 23a and 23e can be thermally coupled to one another via a heat exchanger (not shown) in order to use the heat in the exhaust air , i.e. indoor air RL, for preheating the supply air, i.e. outdoor air AL.

Reference List

1

Air Quality Sensor

2

monitor

3

sterilization box

3a

trigger sensor

3b

radiation source

4

Disinfectant dispenser

4a

trigger sensor

4b

level sensor

4c

exhaust port

4d

disinfectant container

5

speaker

6

transmit/receive unit

7

Power supply

7a

battery

7b

solar cell

8th

people counter

10

camera

11

temperature sensor

12

motion detector

13

heating device

14

cooler

15

fan

16

Filter Controller

17

air intake opening

18

Air Discharge Port

19

Switch, switch flap

20

germ filter

21

Activated carbon filter

23, 23a-e

air pipe

26

cell phone charging station

27

Thermal camera

29

role

31

humidity sensor

32

ticket generator

50

filter tower

50*

steering

60

Radiation Disinfection Device

60*

steering

61

Air flow generator, fan

61'

axis of rotation

62

Base frame, guide device

62a

back panel

62b

Side wall

62c

cross brace

62d

longitudinal brace

62'

flow direction

62"

flow channel

63

surveillance device

64

surveillance device

65

cover

65a

Frame

65b

covering

66

Radiation source, UV fluorescent fabric tube

66'

effective range

66"

level

67

signaller

69

Humidity regulator

69a

Humidifier

69b

air dehumidifier

70

Speaker sanitizer

71

Anti-splash plate

72

disinfection tube

73

cross brace

74

Base frame, pipe socket

75

stand plate

90

input device

90*

steering

100

air purification system

100*

Control center, master control

101

window opener

AL

outside air

RL

indoor air

f

Window

G

corridor

H

mobile

MNM

Mouth and nose mask

P

person, passer-by

R

space, monitored space

S

Chair

ST

Desk

W

Wall

X

first main direction

Y

second main direction

Z

Perpendicular to the main plane

T

door

Claims (31)

Air cleaning system (100) for removing germs from the room air (RL) of a room with: - at least one radiation disinfection device (60), and - an entrance device (90) for setting up at the entrance, in particular the entrance door (T), of the room, the radiation disinfection device (60) comprising: - an air flow generator (61), - a radiation source (66) for disinfecting radiation, - An electric or electronic controller (60*) for controlling the radiation disinfection device (60), wherein - a guide device (62) is present in order to guide the air flow past the radiation source (66) within its effective range (66'), and/or - the disinfection device (60) is designed in such a way that the room air (RL) moved by the air flow generator (61) is within the effective range (66') of the radiation source (66) for a predetermined, in particular adjustable, dwell time, and wherein the Entry Device (90) includes: - A people counter (8) for people (P) who pass the entrance device (90) in the direction of the space behind (R), the entrance device (90) being configured to emit an alarm signal if a specified maximum number of people has been reached, as well as - a temperature sensor (11) that works wirelessly and at a distance, in particular a pyrometer or a thermal imaging camera (27), which measures the surface temperature of the person (P) passing by and if the surface temperature of the person (P) is too high gives an alarm signal. Air purification system (100) after claim 1 , characterized in that - the radiation source (66) is a UV light source, in particular a UVC light source (66), which emits in particular radiation between 200 nm and 300 nm, in particular between 220 nm and 270 nm, in particular between 230 nm and 280 nm, in particular between 250 nm and 260 nm, in particular 254 nm. Air purification system (100) according to one of the preceding claims, characterized in that - there is a freely configurable, in particular flat, cover (65), in particular made of an air-permeable material, in particular a textile material, behind which the radiation source (66) is arranged in a plane (66") parallel in particular to the cover (65), - in particular the cover (65) is part of the guide device (62), - so that the air flow is guided along the rear side of the cover (65). Air cleaning system (100) according to one of the preceding claims, characterized in that - an air quality sensor (1) is present, which measures at least one indoor air quality parameter and in particular displays the measured value, - preferably a CO ₂ sensor and /or a VOC sensor (volatile organic compound) and/or an air humidity sensor and/or a temperature sensor, - Which is present in a structural unit with the disinfection device (60) or separately from it. Air cleaning system (100) according to one of the preceding claims, characterized in that - a monitoring device (63), in particular an operating current monitoring device (63), is present for monitoring the function of the radiation source (66), in particular the UV light source (66), and/or - a monitoring device (64), in particular an operating current monitoring device (64) or a flow sensor, is present for monitoring the function of the air flow generator (61). Air cleaning system (100) according to one of the preceding claims, characterized in that - a signal generator (67), in particular an optical or acoustic one, is provided for emitting an alarm signal if the monitoring device (63, 64) is not functioning properly is detected, - a transmitter (6) is present in order to transmit the alarm signal contactlessly to a remote monitoring center (100*). Air cleaning system (100) according to one of the preceding claims, characterized in that - a switch-on device for the disinfection device is present, - which can be attached by a motion detector (12) and/or a remote radio switch and/or a remote gate switch an inlet of the room (R) and/or the air quality sensor (1) can be controlled. Air purification system (100) according to any one of the preceding claims, characterized in that - a humidity regulator (69) with an air humidifier (69a) and/or an air dehumidifier (69b) is present, which in particular depends on the humidity -Sensor (1) or the controller (60*) can be controlled, and which is in a structural unit with the disinfection device (60) or is present separately therefrom. Air purification system (100) according to one of the preceding claims, characterized in that - the controller (60*) is designed in such a way that it can be connected to a motorized window opener (101) using signals, in particular wirelessly. Air purification system (100) according to one of the preceding claims, characterized in that - the system (100) comprises a plurality of radiation disinfection devices (60), - the controls (60*) of the individual radiation disinfection devices (60) being coupled to one another in terms of signals and - either one of them works as a master controller (100*), - or there is a controlling control center (100*) hierarchically above these controllers (60*). Air cleaning system (100) according to one of the preceding claims, characterized in that - if there are several radiation disinfection devices (60), at least one is designed as a speaker disinfection device (70), - which comprises a transparent splash guard plate (71) and the Radiation source (66) and/or the air flow generator (61) are/is arranged below or in the lower area of the splash guard plate (71). Air cleaning system (100) according to one of the preceding claims, characterized in that - the system comprises at least one motor-operated and controllable window opener (101), - the controls (60*, 100*) are designed in such a way that they can control at least one window opener (101) and - in particular can record and store the opening times of the windows (F) and doors (T). Air purification system (100) according to any one of the preceding claims, characterized in that - the system (100) comprises at least one, in particular mobile, in particular tower-shaped, filter tower (50) with a germ filter (20), - in which in particular a Soft (19) is present to pass this air either through the germ filter (20) or the germ filter (20) when transporting room air (RL) and/or outside air (AL) through the filter tower (50). to let flow, - whereby room air (RL) is preferably sucked in, passed through the germ filter (20) and then fed back to the monitored room (RL). Air purification system (100) after Claim 13 , characterized in that on the filter tower (50) - the air intake opening (17) for room air (RL) is arranged close to the ground, in particular at a height of no more than 1 m, better no more than 50 cm, better no more than 30 cm above the floor , - the air discharge opening (18) to the space (R) is arranged in the upper area, in particular in the upper third, of the hygiene tower (50), at least at a height of 1.30 m, better at least 1.50 m. Air cleaning system (100) according to one of Claims 13 or 14 , characterized in that in the filter tower (50) the germ filter (20) has a filter control device (16) which monitors the germ load of the filter (20) and when the maximum load is reached a signal to replace the filter (20) gives. Air cleaning system (100) according to one of Claims 13 until 15 , characterized in that the filter tower (50) - comprises a monitor (2) which is suitable for displaying the air parameters, and/or - a dispenser (4) for disinfectants with a non-contact trigger sensor (4a) . Air cleaning system (100) according to one of Claims 13 until 16 , characterized in that - the filter tower (50) comprises a controller (50*) and the controller (50*) is able to indicate, in particular by releasing the filter housing closure, when or after which waiting time after the end of the Filter operation of the germ filter (20) is no longer infectious and can be changed. Air purification system (100) according to any one of the preceding claims, - Wherein the entrance device (90) comprises a camera (10) which is capable of optically checking, in particular by means of artificial intelligence, whether the person passing the entrance device (90) and, if set up appropriately, the entrance to the room (P) wears a mouth and nose mask (MNM), the camera being connected to the controller (100*) in terms of data technology, Air purification system (100) after Claim 18 , characterized in that - outside the admission times for the monitored room (R), the camera (10) is able to visually check whether the person (P) passing the entrance device (90) along a corridor, for example, has a mouth - wears a nose mask (MNM), with the camera being connected to the controller (100*) in terms of data technology, - outside the operating hours of the monitored room (R), the camera (10) is able to carry out room surveillance, in particular burglary surveillance and/or fire surveillance and/or water damage surveillance. Air purification system (100) according to one of the preceding claims, characterized in that - the input device (90) comprises a dispenser (4) for disinfectant. Air purification system (100) according to any of the preceding Claims 13 until 20 , characterized in that - the radiation disinfection device (60) and the filter tower (50) has a controller (50*, 60*) for evaluating the data from the air quality sensors (1), in particular for display on the monitor ( 2) and/or the acoustic output via a loudspeaker (5) that may be present, as well as for the data-technical, in particular wireless, connection to a higher-level control center (100*), in particular - the controller (50*) has a SIM card connection, and/or - an epidemic warning app, in particular a corona warning app, is installed on the controller (50*). Air cleaning system (100) according to one of the preceding claims, characterized in that the radiation disinfection device (60) and/or the filter tower (50) - has a self-disinfecting surface, or - comprises a self-cleaning device. Air cleaning system (100) according to any one of the preceding claims, characterized in that on the input device (90) and/or the filter tower (50) and/or the speaker device (70) - a, in particular closable, sterilization box (3) for inserting and sterilizing objects without disinfectant liquid, - the sterilization box (3) comprises a radiation source (3b) for disinfecting electromagnetic radiation, in particular in the UV wavelength range. Method for removing germs from the room air (RL) of a room with an air purification system (100) according to one of the preceding claims, in that the room air (RL) is guided through the effective range (66') of the disinfecting radiation source (66) while complying a sufficient dwell time of the individual air components in their effective area (66'), with the room air (RL) being transported so slowly through the effective area (66') of the radiation source (66) that the sufficient dwell time is at least reached or exceeded, wherein the method further comprises the following steps: - counting of persons (P) who pass through an entry device (90) of the air purification system (100) placed at the entrance of the room in the direction of the room behind it, with a person counter (8 ), - measuring the surface temperature of the passing people (P) end up with a wireless and remotely functioning temperature sensor (11) of the entrance device (90), and - outputting an alarm signal if the measured surface temperature is too high and/or the counted number of people ( P) reaches a predetermined maximum number. procedure after Claim 24 , characterized in that the air quality based on the air parameters - carbon dioxide (CO2) content, and / or - volatile organic compound (VOC) content is determined. Method according to one of the preceding method claims, characterized in that the air quality parameters are determined several times and/or remotely by one of the devices of the air cleaning system (100). Method according to one of the preceding method claims, characterized in that the measured air quality parameters to the surroundings of the radiation disinfection device (60) and/or input device (90) and/or filter tower (50) by means of a monitor (2) or communicated acoustically and/or reported to a higher-level control center (100*), in particular reported wirelessly. Method according to one of the preceding method claims, characterized in that - the presence of a mouth-nose mask (MNM) on the passing person (P) is checked, - in particular the measured surface body temperature from the controller (90*, 100*) is relativized depending on the ambient temperature in the vicinity of the measuring temperature sensor (11) and - in the case of a hygienically negative result, an access barrier is closed or a warning signal is emitted. Method according to one of the preceding method claims, characterized in that if there is a connection to a door opener or window opener (101) if the air quality is too poor, the window (F) or the door (T) is automatically controlled by the control (100*) of the air cleaning system, for example (100) is opened. Method according to one of the preceding method claims, characterized in that the air, outside air (AL) or room air (RL), guided through the filter tower (50) of the air purification system (100) is heated or cooled. Method according to one of the preceding method claims, characterized in that a camera (10) is used in order - to count passers-by (P), and/or - to check whether passers-by (P) are wearing a mouth and nose mask (MNM). , and/or - in the case of a thermal imaging camera (10), (27), whether people have an increased surface temperature, and/or - a passer-by (P) triggers the dispenser (4) for disinfectant, in particular also the disinfectant used, and/or - to conduct video conferences, and/or - in the case of a security signal, to transmit images relating to burglary, fire, water, etc. to a control center (100*), and/or - to monitor the room (L), especially together with a motion detector (12).

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