WO2017103246A1

WO2017103246A1 - Portable individual air purification system

Info

Publication number: WO2017103246A1
Application number: PCT/EP2016/081642
Authority: WO
Inventors: Alexander BRÄNDLE; Henning Hayn; Michael Meyer; Dirk Webert; Simon BLASCHKE
Original assignee: Alfred Kärcher Gmbh & Co. Kg
Priority date: 2015-12-18
Filing date: 2016-12-19
Publication date: 2017-06-22
Also published as: DE102015122316A1

Abstract

To further improve a portable individual air purification system comprising a portable individual air purification apparatus, having a housing which can be carried by a user, having an air filter device for filtering ambient air, having an air delivery device for generating a non-filtered air flow to the air filter device and generating a filtered air flow away from the air filter device, having an air guidance device for guiding the filtered air flow and having an air discharge device for discharging the filtered air flow, wherein the air filter device and the air delivery device are fluidically connected to one another and are arranged or formed in the housing, and wherein the air guidance device, in particular at least a part thereof, fluidically connects the air delivery device and the air discharge device to one another, it is proposed that the air delivery device delivers the filtered air flow at a flow speed, and that the flow speed of the filtered air flow at the outlet from the air discharge device corresponds to an outlet speed in a range from approximately 1 m/s to approximately 5 m/s.

Description

Portable individual air purification system

The present invention relates to a portable individual air cleaning system comprising a portable individual air cleaning device having a user-portable housing, an air filter means for filtering ambient air, an air conveyor for generating an unfiltered air flow to the air filter means and a filtered air flow away from the air filter means, an air guide means for Guiding the filtered air flow and an air discharge device for discharging the filtered air flow, wherein the air filter device and the air conveyor fluidly connected to each other and arranged or formed in the housing and wherein the air guide means, in particular at least a part thereof, the air conveyor and the air discharge device fluidly interconnects.

An increasing problem, especially in metropolitan areas of this earth, is the air pollution. High concentrations of fine dust and high pollutant concentrations determine everyday life in many large cities. In some cities, due to heavy air pollution, there is an increased risk of suffering from respiratory diseases, from simple infections to cancers. Since air pollution in many places only with great effort and in the short term is not reducible, it makes sense that people use individual air purification devices to clean the required breathing air before inhalation if necessary by filtering the ambient air and optionally further processed.

A portable individual air cleaning system of the type described above with a portable individual air cleaning device is exemplified as known from EP 1 363 706 Bl. This includes a diffuser for dispensing filtered air that is positioned closer to the nose and mouth of the user and has a width large enough to extend over both the area of the nose and the mouth.

However, a problem with this known air cleaning device is that, due to the diffuser used, a large amount of air is required to provide the user with a sufficient amount of filtered air. To achieve this volume, a correspondingly large and therefore large air conveyor is required.

It is therefore an object of the present invention to further improve a portable individual air cleaning system of the type described above.

This object is achieved in a portable individual air cleaning system of the type described above according to the invention that the air conveyor promotes the filtered air flow at a flow rate and that the flow rate of the filtered air stream at the outlet of the air discharge device an exit velocity in a range of about 1 m / s to about 5 m / s corresponds.

By the proposed development of the known air cleaning system is achieved in particular that the exiting the air discharge device filtered air is sufficiently fast to reach the user's breath openings, so its mouth and / or nose, without a no longer tolerable amount of ambient air in get this filtered airflow and can be routed to the user's breathing ports. This is achieved in particular by an exit velocity in the specified range. The air conveying device can be designed, in particular, in order to be able to specify the flow velocity and, for example, also the outlet velocity in a targeted manner. This has particular advantages when the user is moving and because of his relative movement to him surrounding unfiltered air or a wind flow of the surrounding air could distract the filtered air exiting the air discharger so that it can not reach the breathing ports or substantially the user's breathing ports. Such discharge speeds are not possible with the air cleaning device known from EP 1 363 706 B1, since this air cleaning device uses a diffuser. Due to its design, the flow velocity is reduced in the outlet region of the diffuser, so that discharge speeds are well below 1 m / s. With the proposed portable individual air cleaning system, a sufficient flow of air to the respiratory orifices of the user can thus be ensured or substantially ensured even at high relative speeds, the filtered air stream exiting from the air discharge device and the ambient air, which the known air cleaning device of the prior art just not possible , Furthermore, the proposed development makes it possible to dispense masks covering the face of the user or large diffusers, as known from the prior art. The flow rate of the filtered airflow may be different on its way from the air conveyor to the air dispenser. In addition, it also depends on the delivered volume flow. It is therefore readily possible for the person skilled in the art, depending on an available air conveying device, by suitable design of the air guiding device and the air discharging device, that the outlet speed of the filtered air stream is at the outlet from the air discharging device in the specified range.

It is favorable if the outlet velocity is in a range from about 2 m / s to about 4 m / s. The provision of the exit velocity in this area has the particular advantage that the user does not perceive the spring-loaded air flow impinging on the breathing openings of the user as unpleasant. Furthermore, it is favorable, in particular also in the case of a portable individual air cleaning system of the type described in the introduction, if the air conveying device is designed to generate a maximum flow volume of 75 liters per minute. Such a limited air conveyor may be provided in a small compact and lightweight design. Thus, the air purification device can be made smaller and lighter overall. In order to reduce the size further, it is advantageous if the air conveyor is designed to generate a volume flow of a maximum of 60 liters per minute. In particular, it may be designed to generate a volume flow of a maximum of 50 liters per minute. Furthermore, it can be designed in particular for generating a volume flow of not more than 40 liters per minute. In particular, it is thereby possible, unlike in the prior art, to form an air cleaning system suitable for everyday use with a minimum air flow capacity which is at most as high, but preferably lower, than known from the prior art. Nevertheless, the function of the system can be sufficiently ensured by the greater exit velocity of the filtered air stream at the exit from the air discharge device.

It is advantageous, especially in a portable individual air cleaning system of the type described above, when the air conveyor is designed to generate a volume flow of at least 10 liters per minute. In particular, the air conveying device can be designed to generate a volume flow of at least 20 liters per minute, more particularly of at least 30 liters per minute. Providing an air delivery device with a minimum volume flow of at least 10 liters per minute allows a user to deliver a sufficient amount of filtered air to his breathing ports. If a user moves and therefore has a higher air requirement, an air conveyor device that can generate a larger volume flow, in particular at least 20 liters per minute or even at least 30 liters per minute, is particularly advantageous. In particular, a practical air cleaning system can be provided whose air conveying device has a volume flow of at least 10 liters per minute and less than 40 liters per minute.

Preferably, the air discharge device has at least one air outlet opening. Also, two or more air outlets may be provided through which the filtered airflow may exit and be directed or directed toward the user's mouth and / or nose.

It is advantageous if the at least one air outlet opening is designed in the form of a nozzle for defining a directed filtered air flow. By forming the at least one air outlet opening in the form of a nozzle, it is possible and ensured at relatively low exit speeds that the filtered air stream can reach the respiratory openings of the user, in particular with exit speeds in the preferred speed ranges specified above.

It is advantageous if the at least one air outlet opening has an exit surface in a range from about 1 cm ² to about 6 cm ² . In particular, a cumulative or total exit area defined by a plurality of air outlet openings can also be in the specified range. Preferably, the exit area is in a range of about 2 cm ² to about 5 cm ² . It is favorable if the exit surface lies in a range of about 3 cm ² to about 4 cm ² . Such a dimensioned air outlet opening can be made small and compact. It can be arranged in various ways, for example, on a headband, or even integrate into garments of the user, for example, in a collar of a jacket or in a scarf. In addition, not a large part of the user's face is obscured by the air outlet opening.

Furthermore, it may be advantageous, especially in a portable individual air cleaning system of the type described above, if the air cleaning system comprises a holding device for holding the air discharge device on the head or a garment of a user such that the at least one air outlet opening is directed towards the mouth and / or nose and / or at least one user's eye for dispensing a directional filtered airflow toward the mouth and / or nose and / or for delivering a directional filtered airflow Forming an air curtain in front of the at least one eye. Of course, the at least one air outlet opening can also be directed in the direction of both eyes of the user in the manner described to form an air curtain in front of both eyes. The holding device makes it possible, in particular, for a user not to have to worry about where the air outlet opening is arranged, but he can, similar to a wireless headset, move virtually freely. By means of the holding device for holding the air discharge device, the air discharge device, in particular the at least one air outlet opening, can then be directed toward the breathing openings or in the manner defined above to at least one eye, independently of a viewing direction or an orientation of the face.

It is advantageous if the holding device is designed to be adjustable to adapt to different head shapes. This development makes it possible in particular to be able to use the air purification system for different sized people with differently shaped heads meaningful.

A further improved adaptation of the air cleaning system to different users can be achieved in particular by the fact that the air discharge device and the holding device are modular. Thus, with a single air discharge device by replacing the holding device, an adaptation of the air cleaning system to different sized people can be made. An adaptation for fastening the air cleaning system, in particular the air discharge device to different body areas or even to garments, can be made so. A particularly compact and variable construction of the air cleaning system can be achieved if the air guiding device and the holding device are modular.

Preferably, the air discharge device and / or the air guide device are made of a transparent material. For example, this may be a transparent plastic. Due to the transparent design, in particular of the two devices mentioned, a less noticeable appearance of the air purification system can be achieved. It can thus be less disturbing overall.

Preferably, the air discharge device is designed in the form of an outlet nozzle or comprises an outlet nozzle, which comprises the at least one air outlet opening. For example, the outlet can be modular, especially from the remaining part of the air discharge device, such as a main body thereof, separable, so that the outlet, in particular depending on a head shape, can be replaced to optimally adapt the air purification system to different people. Furthermore, an orientation of the air outlet opening can optionally also be varied, either by replacing the outlet nozzle or by adjusting the positioning accordingly.

In order to direct the filtered air flow in a desired direction, it is advantageous if the air discharge device comprises at least one air guide element. This can be designed in particular in the form of an air guide surface defining guide vane. The at least one air guide element may be plate-shaped or curved and have any curved outer surfaces, in particular for deflecting the filtered air flow in a desired direction.

The at least one air guiding element preferably divides the air outlet opening into at least two air outlet segments. Alternatively, the at least two air outlet segments themselves may also be used as air outlet openings. be drawn. In particular, the at least two air outlet segments may be designed facing in different directions in order to guide the filtered air flow in different spatial directions.

In order to be able to align a filtered air flow as individually as possible, it is advantageous if a plurality of air guide elements are provided.

According to a further preferred embodiment of the invention it can be provided that the air discharge device is designed for arranging the at least one air guide element in different orientations or orientations or for moving the at least one air guide element from a first alignment position to a second alignment position. The proposed further developments make it possible, in particular, to orient or orient the at least one air guiding element or also a plurality of air guiding elements so that the filtered air flow arrives exactly where it is to arrive, namely in the area of the breathing openings of a user, or if it has an air curtain in front of it can train both eyes of a user. In particular, the at least one air guide element can be arranged and / or configured to be displaceable and / or pivotable on the air discharge device in order to be able to align the filtered air flow individually for a user.

The at least one air guiding element preferably deflects the filtered air flow before it leaves the at least one air outlet opening. This embodiment in particular allows a particularly compact design of the air discharge device. In particular, the filtered air flow can be deflected in the smallest space, for example, in an angular range of about 180 degrees. For example, the filtered air stream can thus be led past a cheek of the user and deflected in the opposite direction to the user's mouth and / or nose.

It is favorable if a cross section of the air outlet opening is at most about twice as large as a minimum cross section of the air discharge device. In this way it can be prevented that the outgoing air flow, as in a known from the prior art diffuser, is excessively expanded. Rather, by limiting cross-sectional ratios as indicated, an orientation of the filtered airflow can be improved, and also the filtered airflow itself can be optimized in comparison, in particular, to windy ambient conditions or to a moving user.

A particularly compact design of the air cleaning system can be achieved in particular in that the minimum cross section of the air discharge device is formed in the transition region to the outlet. In particular, a coupling may be formed at this area in order to separate the outlet connection from the remaining part of the air delivery device. In particular, it is also possible to specify a flow rate taking into account the delivery volume and the minimum cross section for the air purification system.

Advantageously, the outlet nozzle forms the air discharge device or a free end thereof. Thus, in particular, a shape of the outlet nozzle directly align the exiting air flow in the desired manner. In addition, at this position of the air discharge device, the outlet nozzle can also be removed or replaced in a simple manner in a modular design, for example for cleaning purposes or for individual adaptation to different users. In particular, a coupling of the outlet nozzle with the remaining parts and elements of the air discharge device via a snap or snap connection device or even by a magnetic coupling. In particular, when the outlet nozzle forms the air discharge device, the air purification system can be made particularly compact.

In a simple manner, the at least one air outlet opening can be optimally aligned for a user when the outlet nozzle is adjustably arranged or formed on the air discharge device. In particular he can can be arranged or designed to be rotatable and / or displaceable on the air discharge device.

For an optimal adaptation of the air cleaning system to a user, it is advantageous if the air discharge device is adjustably arranged or formed on the holding device. In particular, it can be arranged and configured to be rotatable and / or displaceable on the holding device.

It is advantageous if the air cleaning system comprises a power supply device for operating the air conveyor. In particular, this may be designed in the form of a network-independent power supply device. With a network-independent power supply device, it is possible, in particular, for a user to be able to move freely.

In particular, it is advantageous if the energy supply device is arranged outside the housing and connected to the housing and / or the air conveying device via an electrical connection line, for example a USB cable. For example, may be provided on the housing a socket for the electrical connection line, which is electrically connected to the air conveyor or a control and / or regulating device of the air cleaning system. This allows the connection cable to be disconnected when not in use.

The air purification system can be designed in a particularly simple and cost-effective manner if the energy supply device is designed in the form of a battery. In particular, this may be in the form of a rechargeable battery. The energy supply device may in particular be arranged outside the housing and be coupled via a corresponding connection device with the air conveying device in the housing. For example, this connection contacts can be arranged or formed on the housing, which are connected to the air conveyor, so as to connect an external power supply device with the air purification device. In particular, the air purification system can be formed in a simple and compact manner if the energy supply device is arranged in or on the housing. For example, charging contacts may be provided to charge a rechargeable battery on a power grid. Optionally, a charger can be arranged in the housing. However, it may also be located outside of the housing so that it does not need to be worn by the user while using the air cleaning system, so that a weight of portable components of the air cleaning system can be minimized.

It is favorable if the air conveying device comprises a motor-driven fan. Such a fan can be made small and compact as well as lightweight.

Preferably, the fan comprises an electric motor. This allows operation of the air cleaning system with a power supply device in the form of a battery, in particular a rechargeable battery. In addition, such fans are low maintenance with an electric motor and therefore allow long service life.

In order to effectively filter ambient air, it is advantageous if at least one air inlet opening is arranged or formed on the housing, which is directly or indirectly fluid-effectively connected to the air conveying device. Of course, several air inlet openings can be provided. For example, a plurality of air inlet openings may be formed in a regular grid on the housing, so that a total cross-sectional area of all air inlet openings can be made as large as possible in order to promote a large volume flow with minimal energy consumption. An indirect fluid-effective connection can be realized in particular in that the at least one air inlet opening is fluid-effectively connected to the air filter device on the one hand and the air filter device on the other hand to the air-conveying device. So that only filtered air is conveyed to the air discharge device, it is advantageous if the filter device completely covers the at least one air inlet opening. Complete coverage has the particular advantage that the entire air flowing through the at least one air inlet opening has to flow through the filter device.

According to a further preferred embodiment of the invention, it can be provided that the cross-sectional area of the at least one air inlet opening is at least approximately five times the cross-sectional area of the at least one air outlet opening. In particular, the cross-sectional area of the at least one air inlet opening is at least approximately ten times the cross-sectional area of the at least one air outlet opening. In this way, air can flow through the air filter device at a relatively low flow velocity in order then to be accelerated with the air conveying device to the desired flow velocity, in particular when it leaves the air release device. In particular, it is advantageous to provide as far as possible an entire outer surface of the housing, which does not bear against the user's body, with air inlet openings in order to move a maximum volume flow at low speed through the air filter device.

The air cleaning system can be made particularly compact if an air inlet of the air conveyor device is fluidically connected to the air filter device. Furthermore, this also has the particular advantage that the air conveyor must only convey already filtered air. So pollution of the air conveyor can be minimized. Dirt particles that are filtered out of the air, then remain, for example, in a filter element of the filter device, which can be replaced if necessary or even cleaned.

In particular, only short air ducts must be provided if the filter device between the air inlet and the at least one air inlet opening is arranged. Thus, the air purification device can be made particularly compact and a size of the housing can be minimized.

Filtered air can be conducted to the air discharge device in a simple manner if an air outlet of the air conveying device is fluidically connected to the air guiding device. Under the air outlet of the air conveyor is in particular the pressure side of the air conveyor to understand, under the air inlet of the air conveyor a negative pressure side of the air conveyor. Thus, air can be sucked through the air inlet, blown out through the air outlet.

Filtered air can be directed in the desired manner where it is needed if the air guide device comprises or forms an air duct.

In order to arrange the air guiding device as inconspicuously as possible on the user, it is advantageous if this is at least partially flexible and / or elastic. Thus, in particular, it can be guided along the body of a user from the housing, in particular the air conveyor arranged or formed in the housing, to the air delivery device.

The air cleaning system can be designed in a particularly cost-effective manner if the air-guiding device is at least partially in the form of a

Hose is formed. In particular, a good dimensional stability can be achieved if the hose is designed in the form of a corrugated hose.

In order to increase the flow velocity of the filtered air flow in the desired manner, so that it has the required exit velocity on exit from the air discharge device, it is advantageous if the air guide device is tapered in the direction of the air discharge device in cross-section. In particular, it may be conical. In order to prevent undesired closure of the air guiding device, it is advantageous if it is at least partially rigid. In particular, a collapse of the air guide device can be effectively prevented. Furthermore, in particular sections of the air guiding device, which serve to deflect the air flow, thus direct and guide the air flow in a targeted manner, in particular to the air discharge device. In particular, a rigidly formed air guide device connect the housing and the air discharge device directly to each other, so that the housing can be worn for example on the head or neck of the user. This makes it possible to form the air guide device particularly short and compact, which allows lower demands on a flow rate of the air conveyor.

Preferably, the air guide device is at least partially in the form of a tube or tubular. In particular, a stability of the air cleaning system can be improved and a collapse of the air guiding device in particularly sensitive areas can be prevented. Also, such a configuration allows a direct rigid connection between the housing and the air discharge device.

Advantageously, the air filter device comprises at least one filter element. It can also comprise several filter elements. These can be designed identically both by type and by size. Several filter elements may be arranged side by side to filter in each case a part of the polluted air flowing through the at least one air inlet opening. Alternatively, it is also conceivable to arrange at least two filter elements one behind the other, that is to say serially, so that inflowing polluted air must flow through both filter elements one after the other. For example, so different filter types can be used to achieve different filter effects. For example, one filter element may be a mechanical filter element and the other filter element may be a chemical filter element. The at least one filter element may be in the form of a filter be formed cassette. In a filter cartridge and several filter elements, both different greetings and different types can be arranged. An exchange in particular of several different filter elements can be realized in a simple manner. In particular, the housing may have a closure element, so that access to the example arranged in a filter receptacle of the housing at least one filter element is possible to remove it from the housing, for example, to replace it or to clean it. The at least one filter element can also be designed, for example, in the form of a pollen filter. This also allows allergy sufferers to move outdoors with a high concentration of pollen in the outside air, with a high degree of effectiveness.

Advantageously, the at least one filter element is designed in the form of a mechanical and / or chemical filter element. In particular, particulate matter can be filtered out of the polluted air with a mechanical filter element, harmful chemical substances such as nitrogen oxides or the like with a chemical filter element.

It is favorable if the at least one filter element in the form of a

Coarse dust filter and / or in the form of a particulate matter filter and / or in the form of a Schwebstofffilters is formed. With such filter elements, dirt particles of different sizes can be safely filtered out of the ambient air.

In particular, the filter device can be designed cost-effectively if the at least one filter element is designed in the form of a HEPA filter. For example, HEPA filters can be made washable.

It is advantageous if the at least one filter element according to the filter class E12 or H 13 is formed. In particular, separation efficiencies of close to 100% can be achieved. Furthermore, it may be favorable if the at least one filter element is designed according to the filter class El l or coarser. For example, it may thus be an outside air filter with an average efficiency of about 40 to 60% measured on particles with a mean size of 0.4 pm.

According to a further preferred embodiment of the invention it can be provided that the air cleaning system comprises a control and / or regulating device for controlling and / or regulating a volume flow of filtered air generated by the air conveyor. For example, it can be used to control and / or regulate an amount of the filtered air flow and / or a flow speed thereof. The control and / or regulating device can be arranged in particular in the housing of the air purification device.

It is advantageous if the air cleaning system comprises an actuating device for activating and deactivating the air conveying device. In particular, the actuating device can be actuated manually or else automatically as a function of measured values determined with sensors.

The air purification system can be designed in a particularly simple and cost-effective manner if the actuating device comprises an electrical switching element for activating and deactivating the air conveying device. This allows a user to manually activate or deactivate the air purification system. In particular, the actuating device can be arranged on the housing. The actuating device may alternatively also comprise a pushbutton or be designed to interact with the control and / or regulating device contactlessly via a device, for example a smartphone or a remote control, separated from the housing of the air conveyor device.

Advantageously, the air cleaning system comprises at least one sensor for measuring environmental conditions. The at least one sensor can be arranged, for example, on a component of the air purification device or be formed, for example, on the air discharge device or on the housing. Optionally, the at least one sensor can also be arranged on an external device, for example a smartphone or the like.

It is advantageous if the at least one sensor is designed in the form of an acceleration sensor, an air quality sensor or a particle sensor. For example, the accelerometer can be used to determine how fast the user is moving. In particular, it can be determined with the air quality sensor whether and, if appropriate, which pollutants are contained in the ambient air. Thus, the air quality sensor may in particular include chemical sensors to detect certain chemical substances in the ambient air. In particular, a size and a number of dirt, for example fine dust particles, can be determined with the particle sensor. Further, wind speed sensors and temperature sensors may be provided to measure a wind speed and a temperature of the ambient air.

It is advantageous if the control and / or regulating device is designed to automatically control and / or regulate the air flow generated by the air flow device filtered air in response to a measured value determined by the at least one sensor. For example, a volumetric flow can be increased if the at least one sensor, which for example measures a respiration rate of the user, detects an increased need for filtered air. Furthermore, a speed of the delivered volume flow can also be increased as a function of an increasing movement speed of the user or an increasing wind speed in the environment of the user.

Furthermore, it may be favorable if the air cleaning system comprises a radio interface for communicating and / or for exchanging data, in particular with the control and / or regulating device, with other devices, in particular with a computer and / or a smartphone. For example, measured values that are measured with sensors on an external com- computer or a smartphone can be transmitted through the radio interface to the control and / or regulating device, so that they can control the air conveyor and / or regulate accordingly. For example, data can be externally downloaded from the Internet and transmitted to the control and / or regulating device.

In particular, the air cleaning system is easy to handle if it comprises a manually operable volume flow setting device for manually setting a volume flow generated by the air conveyor. For example, a user can then set the volume flow generated by the air conveyor according to his individual needs depending on his physical exertion.

In particular, it is expedient for the manually operable volume flow setting device to be designed to cooperate with the control and / or regulating device. For example, the manually operable volume flow adjusting device may comprise a setting element in the form of a rotary knob. Alternatively, it can also be a slider on the housing or a virtual slider on an external device, such as a

Smartphone, which can be displayed on a screen of the external device and positioned, for example, by a wiping movement of the user to specify a desired volume flow.

Furthermore, it can be advantageous if the air purification system comprises a smartphone, in particular for acquiring data for characterizing environmental conditions and / or vital signs of the user. Alternatively or additionally, the air cleaning system may also include a computer, in particular a portable computer.

According to a further preferred embodiment of the invention, it can be provided that the smartphone comprises an application program for transmitting, in particular for contactless transmission, the data and / or vital signs and / or values retrievable from the Internet Description of environmental conditions from the smartphone to the control and / or regulating device. With the application program, a so-called "App", then a user can easily and conveniently operate the air cleaning system, in particular the air purification device, for example, on and off or manually or automatically set a flow or an exit velocity.

It is advantageous if the data and / or vital signs are a prevailing wind speed, in particular in the region of the at least one air outlet opening, a movement speed of the user, a step frequency of the user and / or a heart rate of the user. However, it is also possible to use an ambient temperature or a respiratory frequency of the user as data and / or vital signs.

In order to improve the portability of the air cleaning device, it is favorable if at least one strain relief device is provided for preventing that tensile forces are transmitted from the air guiding device to the air discharge device. For example, the strain relief device may include a tether, which minimizes relative movement between the air guide device and the air discharge device or completely prevented in certain situations.

Furthermore, it may be advantageous if the air cleaning system comprises a scent delivery device for admixing at least one perfume to the filtered air stream. It can also be mixed with the filtered air stream several fragrances. This can be done for example within the housing between the air outlet of the air conveyor and a connection for the air guide device. Alternatively, fragrances can also be supplied to the filtered air flow, for example, by means of perfume capsules which can be used at the air delivery device.

It is advantageous if the air purification system comprises an air treatment device for processing the filtered air flow. For example, NEN be killed by the air treatment device germs or bacteria. In particular, the air treatment device can also be designed to remove chemical pollutants by adding substances that react with the pollutants to harmless products.

It is advantageous if the air treatment device comprises an ion generator for ionizing the filtered air flow. For example, particles in the air can be charged or discharged, or chemical degradation processes can be promoted by the formation of free radicals, in particular for odor removal or for disinfection.

In order to be able to define in particular the air cleaning device on the body of the user in a defined manner, it is advantageous if the air cleaning system comprises a fastening device for fixing the housing on the body or on the clothing of the user. For example, the fastening device may be in the form of a bag which is permeable to air and in which the housing can be worn on the user's body or on his clothing.

The fastening device can be designed in a particularly simple and cost-effective manner if it comprises at least one fastening strap. In particular, the fastening band can be designed in the form of a Velcro strip. It can cooperate with another Velcro tape, for example, to determine the housing on an upper arm of a user. However, the fastening strap can also be designed to cooperate with fastening straps on a piece of clothing of the user so as to be able to fasten the housing to a jacket, for example in the chest region of a jacket or on the back of the user.

It is advantageous if the fastening device comprises at least one fastening element receptacle arranged or formed on the housing for passing through the at least one fastening strip. In this way, can be at least one fastening tape, for example, on the housing set and / or attach the housing to the user or a garment of the same.

Furthermore, it may be advantageous if the at least one air outlet opening is arranged or formed on a mask or a mouthguard for covering the mouth and / or nose of a user. In particular, the mask or the mouthguard may be part of the air cleaning system. A mask or mouthguard can be defined in a defined manner on the head of a user, so that the filtered air flow can be safely routed to a user's breathing port. In addition, a mask or a mouth guard provide additional shielding to avoid or at least minimize the inhalation of polluted ambient air.

Furthermore, it may be favorable if the at least one air outlet opening is arranged or formed on a piece of clothing. For example, it may be disposed on a collar of the garment such that it is directed towards the mouth or nose of the wearer of the garment. In this way, when leaving a closed room, the air cleaning device can be automatically created by the user when putting on the garment.

Conveniently, the garment is in the form of a scarf, a shirt or a jacket. The said garments in particular make it possible to place the at least one air outlet opening of the air cleaning system in the desired manner in order to allow the user to inhale filtered air which is as exclusively as possible.

Furthermore, it may be favorable if the at least one air outlet opening is arranged or formed on a headphone, a headset or a helmet. The devices described may, for example, be detachably connectable to an air guiding device in order to lock the headset, the headset or a helmet with an air conveying device which may be arranged or formed in a housing as described above. tie. In particular, such a modular construction of the air cleaning system can be further improved, so that parts of the system are arranged on devices or device that a user must wear anyway, such as a helmet while riding a bicycle or riding a motorcycle. The helmet is then only connected to the parts of the air cleaning system that are not arranged or formed on the helmet.

In order to make the portability of the air cleaning device as variable as possible, it is advantageous if the fastening device is designed for fastening the housing on an arm, on the head, on the back or on the hip of the user.

In order to be able to filter contaminated ambient air with the lowest possible energy consumption, it is favorable if a total pressure loss between the air outlet and the at least one air outlet opening is at most about 5 mbar. In particular, it is favorable if it is at most about 1.6 mbar. For example, this can be achieved by means of corresponding cross-sections of the air-guiding device and a limitation of its length between the air-conveying device and the air-discharging device.

The following description of preferred embodiments of the invention is used in conjunction with the drawings for further explanation. Show it :

Figure 1 is a schematic diagram of the structure of a portable individual air cleaning system;

Figure 2: an embodiment of an air cleaning system when worn by a female user;

Figure 3 is a perspective, partially exploded, exploded view of a portion of the air cleaning system of Figure 2; Figure 4 is a perspective, partially broken view of the arrangement of Figure 3 from behind;

Figure 5 is an exploded view of the arrangement of Figures 3 and 4;

FIG. 6: a perspective view of an air discharge device of the

Air purification system;

FIG. 7 shows a view of the air discharge device from FIG. 6 in the direction of the FIG

Arrow A;

FIG. 8: an exploded view of the air discharge device from FIGS. 6 and 7;

Figure 9 is a sectional view of the air discharge device of Figure 8 taken along line 9-9;

Figure 10 is a schematic representation of the proportion of fresh air in percent as a function of the volume flow in liters / minute with an arrangement of at least one air outlet opening as shown in the figure above the diagram in comparison with wind and physical stress on the one hand and without wind and without physical stress on the other;

FIG. 11 shows a schematic representation of the flow velocities of the filtered air stream emerging from the at least one air outlet opening at a volume flow of 50 liters per minute and headwind;

FIG. 12: a schematic representation similar to FIG. 11, but in a FIG

Flow rate of 75 liters per minute and headwind; Figure 13 is a schematic representation of the flow velocity distribution when using the air discharge device shown in Figures 6 and 7.

Figure 14 is a schematic representation of the exit of a filtered air flow at different exit velocities;

FIG. 15 shows a schematic representation of the perceptibility of an air flow in front of the mouth and nose;

FIG. 16 is a schematic representation of the detectability of an air flow in the case of tangential flow of the eyes;

FIG. 17 shows a schematic representation of a size of complete units as a function of a generated volume flow;

FIG. 18 shows a schematic representation of a dependence of a filter construction volume on the volume flow;

Figure 19: a schematic representation of another, on a female

User created air cleaning system;

FIG. 20 shows a schematic illustration of a further embodiment of an air cleaning system applied to a male user;

Figure 21 is a schematic representation of another embodiment of an air cleaning system applied to a female user;

Figure 22 is a schematic representation of another embodiment of an air cleaning system applied to a female user; Figure 23 is a schematic representation of another embodiment of an air cleaning system applied to a female user;

Figure 24 is a schematic representation of another embodiment of an air cleaning system applied to a female user;

Figure 25 is a schematic representation of another embodiment of an air cleaning system applied to a female user;

Figure 26 is a schematic representation of another embodiment of an air cleaning system applied to a female user;

Figure 27 is a schematic representation of another embodiment of an air cleaning system applied to a female user;

Figure 28 is a schematic representation of another embodiment of an air cleaning system applied to a female user; and

Figure 29: a schematic representation of another embodiment of an air cleaning system.

FIG. 1 schematically shows a schematic representation of the construction of a portable individual air cleaning system 10 with essential and optional components. It comprises a portable individual air cleaning device 12 for filtering ambient air 14. The air cleaning device 12 comprises a portable housing 16 which may also be in the form of a base carrier or base frame. An air filter device 18 is arranged on or in the housing 16 for filtering the ambient air 14. Further, an air conveyor 20 is arranged in or on the housing 16 for producing an unfiltered air flow to the air filter device 18 and producing a filtered air flow away from the air filter device 18.

The air cleaning device 12 further comprises an air guiding device 22 for guiding the filtered air flow. Furthermore, the air cleaning device 12 comprises an air discharge device 24 for discharging the filtered air flow.

The air filter device 18 and the air conveyor device 20 are connected to one another in a fluid-efficient manner, for example via an air channel 26.

The air guiding device 22 connects the air conveying device 20 and the air discharging device 24 in a fluid-efficient manner with one another. In particular, the air guiding device 22 and the air discharge device may also be formed integrally or in one piece. Air guiding device 22 comprises an air duct 28, which fluidly connects an air outlet 30 of the air conveying device 20 with an air connection 32 on the housing 16. Also, the air channel 26 may be considered as part of the air guiding device 22 of the air cleaning device 12.

The air discharge device 24 comprises at least one air outlet opening 34. This can be designed in particular in the form of a nozzle 36 for defining a directional filtered air stream 38.

The air cleaning system 10 may further optionally include a retainer 40 for holding the air dispenser 24 on the head or on a garment of a user 48. The holding device 40 may in particular be designed such that the at least one air outlet opening 34 is directed towards the mouth 42 and / or the nose 44 and / or at least one eye 46 of the user 48 for delivering the directional filtered air stream 38 in the direction of the mouth 42 and / or the nose 44 and / or Dispensing the directional filtered air stream 38 to form an air curtain 50 in front of one or both eyes 46.

The holding device 40 may in particular be designed individually adjustable to adapt to different head shapes. It is also optionally connected via a connecting device 52 with the air discharge device 24. In particular, the air guiding device 22 and / or the air discharge device 24 and the holding device 40 may be modular. In this case, the connecting device 52 may in particular be designed such that the holding device 40 can be separated from the air discharge device 24 so as to be able to combine any desired differently configured holding device 40 with differently configured air discharge devices 24.

The air discharge device 24 and / or the air guiding device 22 may in particular be wholly or partially made of a transparent material. For example, it may be a transparent plastic such as polyethylene or polystyrene.

The air discharge device 24 can optionally have an outlet connection 54 or be designed in the form of an outlet connection. At the outlet port, the at least one air outlet opening 34 may be arranged or formed. In particular, the outlet port 54 may define the nozzle 36 as a whole.

The air discharge device 24 may further comprise one or more air guide elements 56 for guiding the filtered air flow 38 before exiting the at least one air outlet opening 34. They serve to guide and possibly deflect the air flow 38 before exiting the at least one air outlet opening The air discharge device 24 may in particular be designed such that the at least one air guide element 56 can be arranged in different orientations or orientations or that the at least one air guide element 56 can be moved from a first alignment position to a second alignment position. In particular, the at least one air guiding element 56 can be arranged or designed to be displaceable and / or pivotable on the outlet connection 54.

FIG. 1 schematically shows that the outlet connection forms a free end 58 of the air delivery device 24. In particular, it can be arranged or designed to be adjustable on the air discharge device 24. In particular, it can be arranged or designed to be rotatable and / or displaceable on the air discharge device 24.

Optionally, a coupling device 60 may be provided to release the outlet port 54 from a base body 62 of the air delivery device 24 and to be able to reconnect with it. In particular, the coupling device 60 may comprise mutually cooperating magnetic elements, which are arranged or formed on the one hand on the base body 62 and on the other hand on the outlet port 54.

For operating in particular the air conveyor device 20 is a power supply device 64. This may be formed in particular in the form of a network-independent power supply device 64.

The power supply device 64 may optionally be in the form of a battery 66. In particular, the battery 66 may be rechargeable. For this purpose, for example, a connection socket 68 may be formed on the housing 16 in order to charge the battery with an external charger to a power supply.

Not shown in Figure 1 may optionally be arranged or formed in the housing 16, a charging circuit, so that the battery 66 directly via a Connection between the connector 68 and a power grid can be charged.

The power supply device 64 does not necessarily have to be arranged in the housing 16. For example, it may also be carried externally by the user 48. In particular, it can then deliver electrical energy to the air conveyor 20 via the connector 68.

Optionally, the connector 68 may also serve, when the battery 66 is empty, to connect an external battery 70 to the air conveyor 20 via a connecting line 72 to allow continued operation of the air cleaning system 10.

In particular, the air conveyor 20 may include a motor driven fan 74 having an electric motor 76.

The air conveying device presses conveyed air through the air outlet 30 into the air guiding device 22. The air outlet 30 therefore forms a pressure connection of the air conveying device 20. An air inlet 78 of the air conveying device 20 forms a vacuum connection of the same. This can optionally be fluidically connected via the air channel 26 to the air filter device 18 as already described.

On the housing 16, one or more air inlet openings 80 are formed, which are fluidly connected via fluid-effective connections 82 with the air filter device 18. Polluted ambient air 14 may enter through the air inlet openings 80 and be conveyed to the filter device 18 through the connections 82, which may in particular also be part of the air guiding device 22, when the air conveying device 20 is in operation.

As described, the air conveying device 20 is indirectly in fluid communication via the air filter device 18 with the air inlet openings 80. Alternatively, the air filter device can also be fluidically connected to the air outlet 30 on the pressure side, so that ambient air 14 is conducted directly through the air inlet openings 80 via the air inlet 78 to the air conveyor device 20 and only then is pressed by the air filter device.

The air filter device 18 can optionally also be arranged such that it completely covers the air inlet openings 80. An unfiltered air stream 84 of ambient air 14 then flows directly into the air filter device 18 through the air inlet openings 80.

The air guide device 22 may include or form an air passage 86 through which filtered air may be directed from the air outlet 30 to the air discharge device 24.

In order to allow an individual adaptation of the air cleaning system 10 to a user, the air guide device 22 is at least partially flexible and / or elastic. For example, the air channel 86 may be formed by a hose 88.

In particular, in the interior of the housing 86, the air guide device 22 may be formed, for example in the form of a tube 90 or tubular.

The air filter device 18 may include one or more filter elements 92. The filter elements 92 may be in the form of mechanical or chemical filter elements 92. For example, they may form coarse dust filters, particulate matter filters and / or particulate matter filters. In particular, they can be designed as HEPA filters.

The filter elements 92 may be formed according to the filter classes E12 or H13 or else El l or coarser. One or more filter elements can be arranged one behind the other, so that the unfiltered

Air flow 84 must flow through a plurality of filter elements 92.

For example, mechanical filter elements and chemical Filter elements can be arranged one behind the other, so that the air stream 84 can be cleaned of both particles and chemical pollutants.

In principle, the air cleaning device 12 could be designed in such a way that a simple switching element is provided for activating and deactivating the air conveying device 20 in order to interrupt or close a circuit in which the air conveying device 20 and the energy supply device 64 are arranged.

Optionally, a control and / or regulating device 94 may be provided for controlling and / or regulating a volume flow of filtered air generated by the air conveying device 22.

The air cleaning system 10 may further include an actuator 96 disposed, for example, on the housing 16. Optionally, the control and / or regulating device 94 can also be activated with it to disconnect or close a power supply line which connects the power supply device 64 to the control and / or regulating device 94.

The actuating device 96 may in particular comprise an electrical switching element 98. This can be designed for example as a switch or button.

The air cleaning system 10 may further include an external operator 100. This can be designed, for example, as a stand-alone computer or as a smartphone 102. For example, an application program can be installed on the smartphone 102 with which the air cleaning system 10, in particular the air conveyor 20, can be activated or deactivated. For this purpose, for example, the application program in the form of a so-called "app" display on a screen 104 virtual switching elements 106 and 108, with which the air conveyor 20 can be manually activated or deactivated by the user 48. The air cleaning system 10 may further include one or more sensors 110 for measuring environmental conditions. For example, a sensor in the form of an acceleration sensor, an air quality sensor or a particle sensor may be formed.

One or more sensors may be disposed on the housing 16. However, it is also possible to use sensors of the operating device 110. For example, an acceleration sensor of the smartphone 102 can be used. In particular, a prevailing wind speed in the region of the mouth 42, nose 44 or eye 46 of the user 48 can also be measured with the sensors 110.

Furthermore, for example, a movement speed of the user 48 or a step frequency can be measured via a GPS sensor on the operating device 100 or the air cleaning device 12. A heart rate sensor of the user 48 can also be optionally measured with a heart rate sensor. Even a respiratory rate can be measured in this way.

With the application program which is operated on the smartphone 102, in particular data and / or vital signs and / or values retrievable from the Internet 112 for describing environmental conditions can be transmitted from the smartphone 102 to the control and / or regulating device 94. For this purpose, in particular a radio interface 114 can be used, which enables a non-contact data exchange with the operating device 100. In particular, a Bluetooth connection or even a WLAN connection can be used here.

The control and / or regulating device 94 may in particular be designed to automatically control and / or regulate the volume flow of filtered air generated by the air conveying device 20 as a function of one or more measuring points determined with one or more of the sensors 110. values. For example, a volume flow can be increased if an increased air requirement of the user 48 is detected. This can be determined, for example, by measuring the respiratory rate of the user or depending on his pacing rate, his heart rate and / or his speed of movement. Ideally, the control and / or regulating device 94 controls and regulates the volume flow of filtered air such that only as much air is provided by the air discharge device 24 to the user as it actually requires. In this way, a service life, in particular with a limited capacity of the power supply device 64, can be optimized.

Alternatively or additionally, the air cleaning system 10 may also include a manually operable Volumenstromeinstelleninrichtung 116 for manually setting a volume flow generated by the air conveyor 20. The volumetric flow adjusting device 116 may in particular be designed to cooperate with the control and / or regulating device 94. For example, an adjustment member 118 may be provided to the user 48 in the form of a rotary knob or slider disposed on the housing 16 for individually manually adjusting the volume flow delivered by the air conveyor 20.

Alternatively or additionally, an adjusting member 118 may also be provided on the operating device 100. For example, this can be a virtual slider 120, which is displayed on the screen 104 of the smartphone 102 and with which the air conveyor 20 can be influenced by touching and moving by the user 48 with one of his fingers such that the conveyed one Volume flow is increased or decreased.

The air cleaning system 10 may further include a strain relief 122. With this can be prevented, for example, that tensile forces are transmitted from the air guide device 22 to the air discharge device 24. For example, the strain relief device 122 may be a tensile band, which is connected on the one hand with a holding member 124 of the air guide device 22 and on the other hand with a holding member 126 on the air discharge device 24.

Another optional element of the air cleaning system 10 may be an air conditioning device 128 for conditioning the filtered air stream 38. For example, the air conditioning device 128 may include or be configured as an ion generator for ionizing the filtered air stream 38.

Further, the air cleaning device 12 may include a scent delivery device 130 for adding at least one perfume to the filtered air stream 38. For example, the fragrance delivery device 130 may include a fragrance solution reservoir 132 and be fluidly connected to the air outlet 30 or air channel 28 or air port 32. For example, with the fragrance delivery device 130, essential oils in user-compatible dosage can be added to the filtered air stream 38.

Further, the air cleaning system 10 may include attachment means 134 for securing the housing 16 to the body or clothing of the user 48. For example, the fastening device 134 may comprise at least one fastening strap 136. This can be formed as one or two co-operating Velcro, so that the housing 16 for the user 48 can be fixed easily and quickly on the body. The fastening strap 136 can also be in the form of a belt or a

Carrier strap be formed so that the housing 16 at the hip of the user 48 or, for example, in the manner of a shoulder bag from

User 48 can be worn.

For easy fixing of the fastening strap 136, at least one fastening element receptacle 138 can optionally be arranged on the housing 16 or be formed, through which the fastening tape 136 is feasible or durchschleifbar.

Of course, other embodiments of the fastening device 134 are conceivable to the housing 16 on an arm, the head, on

Back or at the hip of the user 48 at least temporarily set for the duration of the use of the air cleaning system 10.

In the figures 2 to 9, another embodiment of an air cleaning system 10 is exemplified. To his name, as well as for all other below described

Embodiments, for identical or similar elements the same

Reference numeral used as in the embodiment shown in Figure 1 and described above.

The housing 16 of the air cleaning device 12 can be carried with a fastening strap 136 in the hip area of the user 48. An air duct 86 in the form of a hose 88 connects the air connection 32 with the air discharge device 24. This comprises a base body 62 in the form of a guide sleeve 140 with a nozzle-shaped air inlet 142, in which the tube 88 is inserted.

The air inlet 142 is about at an angle of 45 ° in the guide sleeve 140 via. The other end is curved by about 90 ° and opens into an annular connecting ring 144, which forms a first coupling element 146 of the coupling device 60. Cooperating with this is a second coupling element 148 of

Coupling device 60 is provided, which is formed on the base body 62 removable outlet 54. For example, one of the two coupling elements comprise one or more magnets, the other coupling element comprises a magnetic or made of a ferromagnetic material or containing ring body, so as to provide a magnetic coupling between the coupling elements 146 and 148 in To be able to produce a coupling position, as shown schematically in Figure 2 schematically.

In the transition region between the air inlet 142 and the guide sleeve 140, an adjusting device 150 is arranged. This makes it possible to adjust the air discharge device 24 relative to a holding device 40 forming the retaining clip 152. A free end of the retaining clip 152 is inserted into a recess 154 of the adjusting device 150. The retaining clip 152 engages an occiput of the user 48 and has two ear pads 156 which rest on the ears of the user 48.

The adjusting device 150 allows individual adjustment and alignment of the guide sleeve 140 by the user 48, so that the air outlet openings 34 can be aligned on the outlet port 54 in the direction of the mouth 42 and / or the nose 44 of the user 48.

The outlet nozzle 54 is formed substantially cuboid.

The second coupling element 148 surrounds a substantially circular air inlet 160 which defines an entry plane 162 which extends transversely, in particular perpendicular, to an exit plane 164 defined by the air exit openings 34.

Although the outlet port 54 basically defines only one air outlet opening 34, but this is divided by three air guide elements 56 into four air outlet openings 34 or air outlet segments. The air guiding elements 56 are in the form of guide vanes 166, which define a total of four mutually separate air channels 168. These connect the air inlet 160 and the air outlet openings 34 fluidly with each other.

Two of the vanes 166 protrude out of the air inlet 160 and into the guide sleeve 140. The air guide vanes 166 are sections in the form of flat plate areas and sections in the form of a quarter of a formed cylindrical sleeve. In the area of the air outlet openings 34, the guide vanes 166 do not protrude from the outlet connection 54.

Due to the special design of the coupling device 60, the outlet port 54 can be rotated about an axis of rotation 170. The axis of rotation is defined by a central axis of the coupling elements 146 and 148.

In Figures 3 to 5, the housing 16 is shown schematically with some of the components arranged therein.

The housing 16 includes an upper part 172 and a lower part 174, which are screwed together via screws, not shown. For this purpose, four screw receptacles 176 are formed on the lower part 174, which break through the housing 16. On the upper part 172 four corresponding, sack hole-shaped screw receptacles 178 are formed. Both the upper part 172 and the lower part 174 are preferably formed from a plastic by injection molding.

Overall, the housing 16 essentially forms the shape of a cuboid.

On a top 180 of the top 172, a plurality of holes 182 are formed covering more than half of a surface defined by the top 180.

On the lower part 174, a receptacle 184 is laterally formed in the interior, into which the control and / or regulating device 94 shown schematically in cuboid form is inserted.

Inside, the air port 32 is expanded by a funnel-shaped member 186 toward the other side surface. In a side wall 188, which is opposite to the receptacle 184, a recess 190 is worked out, in which the switching element 98 is inserted.

In the lower part 174, the air conveyor 20 is used, which is designed as a fan 74. The air outlet 30 of the blower 98 projects into the funnel-shaped element 186, which is sealed off from the blower 74, so that the entire air forced by the blower 74 through the air outlet 30 is forced through the funnel-shaped element 186 which forms the air duct 28 and is used for cooling Cross-section significantly reduced air exclusion 32 is accelerated towards.

The air filter device 18 illustrated in the figures includes, by way of example, six filter elements 92 which completely cover the air inlet openings 80 defined by the bores 182, so that the entire ambient air flowing through the air inlet openings 80 also inevitably flows through the filter elements 92. At the same time, the filter elements 92 also cover the substantially annular air inlet 78 of the blower 74. For reasons of clarity, the motor of the blower 74 and the rotor driven by it with the rotor blades for conveying the air are not shown in FIGS.

In the housing 16, a battery 66 is further arranged, which is formed substantially cylindrical and is inserted next to the fan 74 in the lower part 174.

On a rear side of the lower part 174, a protruding retaining clip 192 is formed, as well as a slot 194, through which the fastening strip 136 can be guided.

Between the two screw receptacles 176, which are formed on a side wall of the lower part 174 opposite the air connection 32, a further electronic circuit 196 is arranged. The overview Due to the lack of electrical connection lines are also omitted here.

The air conveyor 20 is designed to generate a maximum flow of 75 liters per minute. In particular, the maximum of the volume flow can also be less than 40 liters per minute. The air conveyor 20 is also adapted to produce a volume flow of at least 10 liters per minute, in particular more than 20 liters per minute. Preferably, the minimum volume flow generated by the air conveyor is at least about 30 liters per minute.

FIG. 10 schematically shows a comparison of the fresh air content in percent as a function of the volume flow of the conveyed air with the air conveyor 20 in liters per minute on the one hand with wind and physical stress and on the other without wind and without physical stress. It can be seen that already at a volume flow of about 25 liters per minute without wind and physical stress, a fresh air content, ie a proportion of filtered air, of 50% can be achieved. This is possible in particular as shown in Figure 10 above, when the outlet port 54 is positioned below the nose 44 and directed in the direction of this. With wind and physical stress, at least a fresh air content of 40% can be achieved at a flow rate of 25 liters per minute. This increases with a doubling of the volume flow to 50 liters per minute to 80% in wind and physical stress and well over 90% without wind and without physical stress.

FIG. 11 schematically shows the flow velocity of the filtered air stream 38 emerging from the air outlet opening 34 of the outlet nozzle 54. The nozzle-like outlet nozzle 54 directs the air stream 38 directed toward the nose 44 at a speed of more than 1 m / s. The volume flow in the schematic illustration in FIG. 11 is 50 liters per minute. Furthermore, head wind prevails in these simulated conditions. In Figure 12, the flow velocity distribution of the air stream 38 directed from the outlet port 54 to the nose 44 of the user 48 is shown at a flow rate of 75 liters per minute in headwind. Here, a majority of the airflow 38 reaches the nose 44. The flow rate of the airflow 38 exiting the air delivery device 24 is about two to three meters per second.

Ideally, the air conveyor 20 conveys the filtered airflow 38 at a flow rate such that the flow rate of the filtered airflow 38 exiting the air dispenser 24 corresponds to an exit velocity in a range of about 1 m / s to about 5 m / s. Conveniently, the exit velocity is in a range of about 2 m / s to about 4 m / s.

Unlike the diffuser known from the prior art, the outlet nozzle 54 is nozzle-like or substantially nozzle-like and therefore makes it possible to direct the air flow 38 to the nose 44 and / or mouth 42 of the user 48 in a targeted manner. For this purpose, it suffices if the at least one air outlet opening 34 as a whole, that is to say when several air outlet openings 34 accumulate, defines an exit area in a range from approximately 1 cm ² to approximately 6 cm ² . Further, it is advantageous if the exit surface has a size in a range of about 2 cm ² to about 5 cm ² . Furthermore, it is advantageous if the exit surface is in a range of about 3 cm ² to about 4 cm ² . The regions of the air outlet opening 34 which are separated from one another by the air guide elements 46 and which themselves can also be referred to as air outlet openings 34 or define air outlet segments, then have a proportionate area proportion of the indicated total surface areas.

Figures 13 and 14 show further optimizations of the air flow 38 in order to bring the highest possible proportion of fresh air, so the proportion of filtered air to the nose 44 of the user. In particular, the exit velocity in FIG. 14 is greatest on the right. However, a sufficiently good filter effect can already reached when, as described above, the exit velocity in a range of about 2 m / s to about 4 m / s.

FIG. 15 schematically shows the perceptibility of an air flow in front of the mouth and nose. A favorable range for the exit velocity of the filtered air stream 38 is therefore in a speed range of about 1 m / s to about 3 m / s.

A limit on frontal impact on the eyes is about 1.5 m / s. A direct on-face flow is acceptable below 4 m / s, a tangential flow past the ear 158 to a maximum of 2 m / s.

FIG. 16 schematically shows the detectability of an air flow in the case of tangential flow of the eyes 46. At just under 1 m / s air velocity, the air flow is clearly noticeable in the case of tangential flow of the eyes 46, so here a limit value for a tangential flow of the eyes 46 can be defined as about 1.5 m / s. This value is achieved, for example, when the outflow velocity from the air outlet opening 34 is about 10 m / s. Therefore, only a barely noticeable flow in the region of the eyes 46 is achieved in the preferred speed ranges for the exit velocity specified above.

In Figure 17 a dependence of the size in dm ³ as a function of the volume flow is shown in liters per second, from Innenraumrei- collectors, as comparison values for the simulations of the flow distributions are shown in Figures 11 to 14th In comparison to these values, an optimized size of less than 0.2 dm ³ results at a flow rate of 0.2 liters per second, ie about 12 liters per minute. If the volume flow were doubled, then a calculated size of about 0.35 dm ³ would be required. So it can be formed a very compact device that can be easily carried by the user 48 and thus has only a small space requirement and consequently also only a low weight. FIG. 18 schematically shows a filter construction volume in dm ³ as a function of a volume flow in liters per second for the filter classes H ll. The data points are from heat exchangers and ventilation systems. The filter volume does not include pre-filter and activated carbon filter.

For an outlet nozzle 54 which is rather nozzle-shaped, the calculated filter volume is about 0.03 dm ^3, with a volume flow of 12 liters per minute and a calculated filter volume of about 0.05 dm ³ at a volume flow of about 25 liters per Minute. This proves that even with a small filter volume, a sufficient volume flow can be cleaned.

FIGS. 19 to 28 show further optional configurations of the air cleaning system 10.

In Figure 19, a collar 198 is exemplified, in which two air channels 86 are arranged to direct filtered air to outlet ports 54, from which the filtered air stream 38 directed towards the mouth 42 and nose 44 of the user 48 can flow.

In Figure 20, a similar arrangement is shown for a male user both the collar for a female user in Figure 19 and the collar 198 in Figure 20 may be formed from a textile-like material or also from a stable plastic to ensure dimensional stability.

In Figure 21, another embodiment is shown in which the housing 16 is secured with a fastening strap 136 around the waist of a female user. The air channel 86 is divided in the region of a manifold 200 into two air channels 86, which are guided via a held behind the ears 158 nose clip to the outlet nozzle 54, which sits directly below the nose 44. The outlet port 54 may be both toward the nose 44 and in the direction of the mouth 42 directed toward the air outlet openings 34.

In FIG. 22, a similar arrangement is shown by way of example as in FIG. 21. The housing 16 is fastened to the upper arm of the female user 48 with a fastening strap 136. An asymmetric ear hook 202 held behind an ear 158 directs the filtered air to the outlet port 54, which, as in the variant 21 shown in Figure 21, is located directly below the nose 44 and optionally air outlet openings to the nose 44 and / or mouth 42 can have.

FIG. 23 schematically shows a further exemplary embodiment of an air cleaning system 10. It is at least partially integrated into a jacket 204. The housing 16 is arranged in the lateral front region of the jacket 204. The air duct 86 is guided substantially within the jacket 204 and terminates in the region of a collar 198 of the jacket on right and left outlet stub 54 whose air outlet openings 34 are directed towards the mouth 42 and nose 44 of the female user 48 out.

In FIG. 24, by way of example only, a collar 198 is shown as a separate garment which surrounds a neck of the female user 48. At the collar two outlet ports 54 are arranged, which are fluidly connected via a respective air channel 86 with the housing 16, not shown. The air outlet openings 34 of the outlet pipe 54 are in turn aligned such that at least one of the air outlet openings 34 in the direction of mouth 42 and nose 44 of the user points.

FIG. 25 schematically shows a further exemplary embodiment of an air cleaning system 10. With the fastening strap 136, the housing 16 is fixed in the hip region of the female user 48 and connected via the flexible air channel 86 with a manifold 200 which divides the air channel into two air channels 86. These are in turn each connected to an outlet port 54, not shown, which is arranged in a mask 206 is. The mask completely covers the user's mouth 42 and nose 44.

FIG. 26 shows by way of example a mask 206 that has been further developed in comparison to the variant in FIG. From this projecting two eye bracket 208, the eyes 46 are formed laterally surrounding. They serve as air channels 86 and terminate in an integrated outlet pipe 54, which in each case has an air outlet opening 34, from which a directed filtered air stream 38 exits tangentially to the eyes 46. Thus, an air curtain 50 can be formed in front of the eyes 46.

The variants of air cleaning systems 10 exemplified in FIGS. 27 and 28 are similar in their construction to the variant from FIG. However, the variant in FIG. 27 does not include a distributor and only one outlet connection formed behind the mask 206. In the variant shown in FIG. 27, the housing 16 is held in the hip region by a fastening strap 136, in the variant shown in FIG. 28 with a fastening strap 136 in the region of the upper arm.

FIG. 29 schematically shows a further variant of an air cleaning system 10. It includes an earloop 212 which is hung over an ear 158 of the user. The housing 16 is integrated with the earhook 212 and forms a free end thereof which is located in the neck or neck area of the user. Optionally, an ear hook can also be provided for the other ear, not shown in FIG. 29, which ear hook is connected to the illustrated ear hook 212 via a neck band. The housing 16 may then be integrated, for example, in the neckband or form this. From the housing extends a tubular air guide device 22, whose free end forms the air discharge device 24, which defines the air outlet opening 34. In the variant illustrated in FIG. 29, the energy supply device 64, for example a rechargeable battery 66, is arranged outside the housing 16 and connected to the housing 16 via a connecting cable 214. On the housing 16 may have a Socket for the connection cable 214 may be provided so that the connection cable 214 are separated if necessary from the housing, for example for storage purposes. By compared to other, above-described variants of air cleaning system short air guide device 22, a delivery rate of the air conveyor 20 can be further reduced, whereby a particularly small and compact design of the housing 16 can be realized.

Preferably, in all the variants of the air cleaning system 10 described above, it is provided that a cross section, in particular an overall cross section, of the at least one air outlet opening 34 is at most about twice as large as a minimal cross section of the air discharge device 24. In particular, the minimum cross section of the air discharge device 24 in the transition region to Outlet 54 be defined, ie in the region of the coupling device 60th

In order to allow a volume flow as possible through the air filter device 20, a cross-sectional area of the at least one air inlet opening 80 or a total area of all air inlet openings 80 is at least about five times as large as a cross-sectional area of the at least one air outlet opening 34 or a total cross-sectional area of all air outlet openings 34.

Preferably, the total cross-sectional area of all the air inlet openings 80 is at least about ten times as large as a total cross-sectional area of all the air outlet openings 34. Thus, a large volume of air can be filtered at a low flow rate in the area of the air filter device 18. The filtered air stream 38, however, can flow out of the at least one air outlet opening 34 at the required higher exit velocity.

In order to be able to accelerate the filtered air flow in the air guiding device 22 in the desired manner, the air guiding device 22 can be moved in the direction of tion tapered on the air discharge device 24 in cross section. In particular, a cross section in the area of the air discharge device 24 can also taper in the direction of the coupling device 60. Thus, taking into account a predetermined delivery volume of the air conveyor 22, the desired flow rate of the air stream 38, in particular at the exit from the at least one air outlet opening 34, be set in the desired manner.

Not shown in the figures are further variants of the air cleaning system 10, in which the at least one air outlet opening 34 is arranged or formed on a headset, a headset or a helmet.

Furthermore, in the air cleaning systems 10 described above, a total pressure loss between the air outlet 32 and the at least one air outlet opening 34 is at most about 5 mbar. In particular, it can even amount to at most about 1.6 mbar. This allows a high exit speed with a minimum delivery volume and thus a minimum energy consumption of the air conveyor 20.

The described variants of the air cleaning systems 10 can basically be combined with their elements and the arrangements of the housing and the air outlet openings 34 on the user 48 virtually any.

Due to the relatively high exit velocity of the filtered air stream 38 in comparison to known from the prior art air cleaning devices with a minimum flow a maximum amount of fresh air to mouth 42 and nose 44 of a user 48 can be promoted. As a result, a larger battery capacity can be provided with the same size and thus a longer service life of the air cleaning system 10 can be achieved than in the known from the prior art air cleaning devices. Alternatively, this may reduce the overall size of the housing and the weight of the air cleaning system 10 as a whole. List of Reference Air purification system

Air cleaner

ambient air

casing

Air-filter device

Air conveyor

Air guide device

Air delivery device

air duct

air outlet

air connection

Air outlet opening

jet

airflow

holder

mouth

nose

eye

user

air curtain

connecting device

outlet

air guide

The End

coupling device

body

Energy supply device battery socket

battery

connecting cable

fan

electric motor

air intake

Air inlet opening

connection

airflow

air duct

tube

pipe

filter element

Control and / or regulating device

actuator

switching element

operating device

Smartphone

screen

switching element

sensor

Internet

Radio interface

Volumenstromeinstelleinrichtung

One part-element

slider

strain relief

retaining member

Air conditioning device

Fragrance dispensing device

reservoir fastening device

fixing tape

Fastener receptacle

guide sleeve

air intake

Attachment ring

first coupling element second coupling element

adjusting device

headband

recess

ear pad

ear

air intake

entry level

exit plane

vane

air duct

axis of rotation

top

lower part

screw receptacle

top

drilling

admission

element

Side wall

recess

headband

slot

circuit

collar distributor

earloop

jacket

mask

Eye bracket ear hook

connection cable

Claims

claims

A portable individual air cleaning system (10) comprising a portable individual air cleaning device (12) having a user-portable housing (16), air filter means (18) for filtering ambient air (14), air conveying means (20) for producing an unfiltered air flow to the air filter means (18) and a filtered air flow away from the air filter means (18), an air guide (22) for guiding the filtered air flow and an air discharge means (24) for discharging the filtered air flow, the air filter means (18) and the air conveyor (20). fluideffekt interconnected and arranged in the housing or are formed and wherein the air guide device (22), in particular at least a part thereof, the air conveying device (20) and the air discharge device (24) fluidly effective interconnects, characterized in that the air conveyor (20) the gefilte Airflow (38) at a flow rate promotes and that the flow rate of the filtered air flow (38) at the exit from the air discharge device (24) corresponds to an exit velocity in a range of about 1 m / s to about 5 m / s.

A portable individual air cleaning system according to claim 1, characterized in that the exit velocity is in a range of about 2 m / s to about 4 m / s.

Portable individual air cleaning system according to one of the preceding claims, in particular according to the preamble of claim 1, characterized in that the air conveying device (20) is designed to generate a volume flow of not more than 75 liters per minute, in particular of not more than 60 liters per minute, more particularly of a maximum of 50 liters per minute, more particularly of a maximum of 40 liters per minute.

4. Portable individual air cleaning system according to one of the preceding claims, in particular according to the preamble of claim 1, characterized in that the air conveyor (20) is adapted to generate a volume flow of at least 10 liters per minute, in particular of at least 20 liters per minute, on in particular of at least 30 liters per minute.

5. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air discharge device (24) has at least one air outlet opening (34).

6. A portable individual air cleaning system according to claim 5, characterized in that the at least one air outlet opening (34) in the form of a nozzle (36) is designed for defining a directional filtered air flow (38).

7. Portable individual air cleaning system according to claim 5 or 6, characterized in that the at least one air outlet opening (34) has an exit surface in a range of about 1 cm ² to about 6 cm ² , in particular in a range of about 2 cm ² to about 5 cm ² , more particularly in a range of about 3 cm ² to about 4 cm ² .

8. Portable individual air cleaning system according to one of the preceding claims, in particular according to the preamble of claim 1, characterized by a holding device (40) for holding the

Air delivery device (24) on the head or on a garment of a user such that the at least one air outlet opening (34) directed towards the mouth (42) and / or the nose (44) and / or at least one eye (46) of the user is for dispensing a directional filtered airflow (38) toward the mouth and / or nose and / or dispensing a directional filtered one Air flow (38) for forming an air curtain (50) in front of the at least one eye (46).

9. Portable individual air cleaning system according to claim 8, characterized in that the holding device (40) is designed to be adjustable to adapt to different head shapes.

10. Portable individual air cleaning system according to claim 8 or 9, characterized in that the air discharge device (24) and the holding device (40) are modular and / or that the air guide device (22) and the holding device (40) are modular.

11. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air discharge device (24) and / or the air guiding device (22) are made of a transparent material.

12. Portable individual air cleaning system according to one of claims 5 to 11, characterized in that the air discharge device (24) in the form of an outlet nozzle (54) is formed or an outlet nozzle (54), which comprises the at least one air outlet opening (34).

13. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air discharge device (24) comprises at least one air guide element (56).

14. Portable individual air cleaning system according to claim 13, characterized in that the at least one air guide element (56) subdivides the air outlet opening (34) into at least two air outlet segments.

15. Portable individual air cleaning system according to claim 13 or 14, characterized by a plurality of air guide elements (56).

16. Portable individual air cleaning system according to one of claims 13 to 15, characterized in that the air discharge device (24) is designed for arranging the at least one air guide element (56) in different orientations or orientations or for moving the at least one air guide element (56) of a first alignment position in a second alignment position.

17. A portable individual air cleaning system according to any one of claims 13 to 16, characterized in that the at least one air guide element (56) deflects the filtered air flow (38) before emerging from the at least one air outlet opening (34).

18. Portable individual air cleaning system according to one of claims 5 to 17, characterized in that a cross section of the air outlet opening (34) is at most about twice as large as a minimum cross section of the air discharge device (24).

19. A portable individual air cleaning system according to claim 18, characterized in that the minimum cross section of the air discharge device (24) in the transition region to the outlet port (54) is formed.

A portable personal air cleaning system according to any one of claims 12 to 19, characterized in that the outlet port (54) forms the air discharge means (24) or a free end (58) thereof.

21. Portable individual air cleaning system according to one of claims 12 to 20, characterized in that the outlet nozzle (54) adjustable, in particular rotatable and / or displaceable, is arranged or formed on the air discharge device (24).

22. Portable individual air cleaning system according to one of claims 8 to 21, characterized in that the air discharge device (24) adjustable, in particular rotatable and / or displaceable, is arranged or formed on the holding device.

23. Portable individual air cleaning system according to one of the preceding claims, characterized by a power supply device (64) for operating the air conveyor device (20), in particular in the form of a network-independent power supply device (64).

24. Portable individual air cleaning system according to claim 23, characterized in that the energy supply device (64) in the form of a battery (66) is formed, in particular in the form of a rechargeable battery (66).

25. Portable individual air cleaning system according to claim 23 or 24, characterized in that the energy supply device (64) in or on the housing (16) is arranged.

26. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air conveying device (20) comprises a motor-driven blower (74).

27. Portable individual air cleaning system according to claim 26, characterized in that the fan (74) comprises an electric motor.

28. Portable individual air cleaning system according to one of the preceding claims, characterized in that the housing (16) at least one air inlet opening (80) is arranged or formed, which is connected to the air conveyor (20) directly or indirectly fluidly effective.

29. Portable individual air cleaning system according to claim 28, characterized in that the air filter device (18) completely covers the at least one air inlet opening (80).

30. A portable individual air cleaning system according to claim 28 or 29, characterized in that a cross-sectional area of the at least one air inlet opening (80) is at least about five times the cross-sectional area of the at least one air outlet opening (34), in particular at least about ten times.

31. A portable individual air cleaning system according to any one of the preceding claims, characterized in that an air inlet (78) of the air conveyor (20) with the air filter device (18) is connected fluidwirk- sam.

32. A portable individual air cleaning system according to claim 31, characterized in that the air filter device (18) between the air inlet (78) and the at least one air inlet opening (80) is arranged.

33. Portable individual air cleaning system according to one of the preceding claims, characterized in that an air outlet (30) of the air conveying device (20) with the air guide means (22) is fluidly connected.

34. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air guiding device (22) comprises or forms an air channel (86).

35. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air guide device (22) is at least partially flexible and / or elastic.

36. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air guide device (22) is at least partially formed in the form of a hose (88), in particular in the form of a corrugated hose.

37. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air guide device (22) in the direction of the air discharge device (24) towards in cross-section tapering, in particular conical, is formed.

38. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air guide device (22) is at least partially rigid.

39. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air guide device (22) is at least partially in the form of a tube (90) or tubular.

40. Portable individual air cleaning system according to one of the preceding claims, characterized in that the air filter device (18) comprises at least one filter element (92).

41. Portable individual air cleaning system according to claim 40, characterized in that the at least one filter element (92) in the form of a mechanical and / or chemical filter element (92) is formed.

42. Portable individual air cleaning system according to claim 40 or 41, characterized in that the at least one filter element (92) in the form of a coarse dust filter and / or in the form of a fine dust filter and / or in the form of a Schwebstofffilters is formed.

43. Portable individual air cleaning system according to one of claims 40 to 42, characterized in that the at least one filter element (92) is designed in the form of a HEPA filter.

44. Portable individual air cleaning system according to one of claims 40 to 43, characterized in that the at least one filter element (92) is formed according to the filter class E12 or H 13.

45. Portable individual air cleaning system according to one of claims 40 to 44, characterized in that the at least one filter element (92) is formed according to the filter class El l or coarser.

46. Portable individual air cleaning system according to one of the preceding claims, characterized by a control and / or regulating device (94) for controlling and / or regulating a volume flow of filtered air generated by the air conveyor (22).

47. Portable individual air cleaning system according to one of the preceding claims, characterized by an actuating device (96) for activating and deactivating the air conveyor (20).

48. A portable individual air cleaning system according to claim 47, characterized in that the actuating device (96) comprises an electrical switching element (98) for activating and deactivating the air conveyor.

49. Portable individual air cleaning system according to one of the preceding claims, characterized by at least one sensor (110) for measuring environmental conditions.

50. Portable individual air cleaning system according to claim 49, characterized in that the at least one sensor (110) in the form of a Acceleration sensor, an air quality sensor or a particle sensor is formed.

51. Portable individual air cleaning system according to claim 49 or 50, characterized in that the control and / or regulating device (94) is designed for automatically controlling and / or regulating the air flow from the device (20) generated air flow filtered air as a function of the at least one sensor (110) measured value.

52. Portable individual air cleaning system according to one of the preceding claims, characterized by a radio interface (114) for communicating and / or exchanging data, in particular with the control and / or regulating device (94), with other devices (100), in particular with a computer and / or a smartphone (102).

53. Portable individual air cleaning system according to one of the preceding claims, characterized by a manually operable Volumenstromeinstelleinrichtung (116) for manually adjusting a volume flow generated by the air conveyor (20).

54. A portable individual air cleaning system according to claim 53, characterized in that the manually operable Volumenstromeinstellein- direction (116) with the control and / or regulating device (94) is designed to cooperate.

55. Portable individual air cleaning system according to one of the preceding claims, characterized by a smartphone (102), in particular for acquiring data for characterizing environmental conditions and / or vital signs of the user (48).

56. Portable individual air cleaning system according to claim 55, characterized in that the smartphone (102) comprises an application program for transmitting, in particular for contactless transmission of the data and / or vital signs and / or from the Internet retrievable values for describing environmental conditions of the smartphone (102) to the control and / or regulating device (94).

57. A portable individual air cleaning system according to claim 55 or 56, characterized in that the data and / or vital signs a prevailing wind speed, in particular in the region of the at least one air outlet opening (34), a movement speed of the user (48), a step frequency of the user (48 ) and / or a heart rate of the user (48).

58. A portable individual air cleaning system according to any one of the preceding claims, characterized by a strain relief device (122) for preventing tensile forces from the air guide means (22) on the air discharge means (24) are transmitted.

59. Portable individual air cleaning system according to one of the preceding claims, characterized by a fragrance delivery device (130) for admixing at least one fragrance to the filtered air flow (38).

60. Portable individual air cleaning system according to one of the preceding claims, characterized by an air treatment device (128) for processing the filtered air flow (38).

61. A portable individual air cleaning system according to claim 60, characterized in that the air treatment device (128) comprises an ion generator for ionizing the filtered air flow (38).

62. A portable individual air cleaning system according to one of the preceding claims, characterized by a fastening device (134) for fixing the housing (16) on the body or on the clothing of the user (48).

63. A portable individual air cleaning system according to claim 62, characterized in that the fastening device (134) at least one fastening band (136), in particular in the form of a Velcro strip comprises.

64. Portable individual air cleaning system according to claim 62 or 63, characterized in that the fastening device (134) at least one housing (16) arranged or formed fastener receiving means (138) comprises for performing the at least one fastening strap (136).

65. Portable individual air cleaning system according to one of claims 5 to 64, characterized in that the at least one air outlet opening (34) on a mask (206) or a mouthguard for covering the mouth (42) and / or nose (44) of a user ( 48) is arranged or formed.

66. Portable individual air cleaning system according to one of claims 5 to 65, characterized in that the at least one air outlet opening (34) is arranged or formed on a garment (204).

67. A portable individual air cleaning system according to claim 66, characterized in that the garment (204) in the form of a scarf, a shirt or a jacket (204) is formed.

Portable individual air cleaning system according to one of claims (5 to 67, characterized in that the at least one air outlet outlet opening (34) is arranged or formed on a headset, a headset or a helmet.

69. A portable individual air cleaning system according to any one of claims 62 to 68, characterized in that the fastening means (134) is adapted for securing the housing (16) on an arm, the head, the back or on the hip of the user (48).

70. A portable individual air cleaning system according to any one of claims 33 to 69, characterized in that a total pressure loss between the air outlet (32) and the at least one air outlet opening (34) is at most about 5 mbar, in particular at most about 1.6 mbar.