Air purifier and method for cleaning air

Abstract

The invention relates to an air purification device with at least one air inlet and at least one air outlet, wherein a fluid-acting air conveying device for generating an airflow from the at least one air inlet to the at least one air outlet and an air purification device for cleaning the air forming the airflow of foreign and / or dirt particles are arranged between the at least one air inlet and the at least one air outlet, wherein the air purification device comprises at least one electrostatic precipitator with an electrically conductive emission electrode for emitting and / or generating charged particles, and an electrically conductive separation electrode for separating charged dirt particles, wherein the air purification device comprises at least one high-voltage source for generating a high voltage between the emission electrode and the separation electrode.wherein the air purification device comprises at least one air purification channel for guiding the airflow from the at least one air inlet to the air conveying device and wherein the separation electrode delimits the air purification channel. Furthermore, an improved method for cleaning air is proposed.

Description

[0001] The invention relates to an air purification device with at least one air inlet and at least one air outlet, wherein an air conveying device for generating an airflow from the at least one air inlet to the at least one air outlet and an air purification device for cleaning the air forming the airflow of foreign and / or dirt particles are arranged or formed in a fluid-effective manner between the at least one air inlet and the at least one air outlet, wherein the air purification device comprises at least one electrostatic precipitator with an electrically conductive emission electrode for emitting and / or generating charged particles, and an electrically conductive separation electrode for separating charged dirt particles, wherein the air purification device comprises at least one high-voltage source for generating a high voltage between the emission electrode and the separation electrode.wherein the air purification device comprises at least one air purification channel for guiding the airflow from the at least one air inlet to the air conveying device.

[0002] Furthermore, the invention relates to a method for cleaning air, in which the air to be cleaned is conveyed through an electrostatic precipitator with an electrically conductive emission electrode for emitting and / or generating charged particles and an electrically conductive deposition electrode for deposition of charged dirt particles, wherein a high voltage is applied between the emission electrode and the deposition electrode.

[0003] Air purifiers of the type described above are known in various embodiments. An example of such an air purifier is described in particular in US 2013 / 0047858 A1. In such air purifiers, the air to be purified is passed through an electric field. Dirt particles are negatively charged by electrons emitted from the emission electrode or, in the case of a positive potential applied to the emission electrode, positively charged. The collection electrode forms a counter electrode to the emission electrode. The charged dirt particles are moved in the electric field between the emission electrode and the collection electrode towards the collection electrode. Thus, all charged dirt particles filtered out of the air to be purified collect on the collection electrode.

[0004] For the air purifier to operate reliably and continuously, it is therefore necessary to regularly clean the separator electrode of the at least one electrostatic precipitator. This is particularly difficult with air purifiers such as those described in US 2013 / 0047858 A1. Electrostatic filter cartridges, as described in this publication, are difficult for a user to clean. It is known to use brushes to remove dirt accumulated between the electrode plates.

[0005] It is therefore an object of the present invention to improve an air purification device and a method of the type described above in such a way as to enable easy handling for a user.

[0006] This problem is solved according to the invention in an air purification device of the type described above by the fact that the separation electrode limits the air purification channel.

[0007] Further developing an air purifier in the proposed manner makes it possible, in particular, to easily clean the separation electrode. As explained, in an air purifier with an electrostatic precipitator, separated dirt particles collect on the separation electrode. With such a device, the user then only needs to clean the separation electrode of dirt particles to ensure the device's continued and reliable operation. For example, the air purifier can be designed so that the separation electrode is removable, specifically independent of the emission electrode, allowing the separation electrode to be easily cleaned, for instance, under running water.

[0008] It is advantageous if at least one electrostatic precipitator unit comprises only a single separation electrode. While the air purifier can include two or more electrostatic precipitators, each of these units can only contain a single separation electrode. This allows the separation electrode to be designed and positioned in such a way that it can be easily detached or removed from the air purifier. This, in particular, simplifies cleaning the separation electrode.

[0009] The design of the air purifier can be simplified, in particular, by making the separation electrode a single piece. Specifically, it can be monolithic. This design allows the user to remove the separation electrode from the air purifier in one piece or to extract it from its housing for cleaning. The separation electrode can be made entirely of an electrically conductive material, so that only a single separation electrode is encompassed by the at least one electrostatic precipitator.

[0010] Alternatively, the deposition electrode can comprise at least two electrically insulated or separated deposition areas. In such a case, the deposition electrode is therefore multi-part. It is formed by the deposition areas. For example, these deposition areas can be strips made of an electrically conductive material, adjacent to the air purification duct, and arranged on a deposition carrier, such as an electrical insulator. The deposition areas can, in particular, be formed as an electrically conductive coating on the deposition carrier.

[0011] A simple way to design a deposition electrode with at least two electrically isolated or separated deposition areas is to arrange or form these areas on a common deposition carrier. In particular, the deposition carrier can be plate-shaped. Preferably, the deposition carrier is made of an electrically insulating material. Electrically isolated deposition areas can thus be formed by deposition areas that are not electrically connected to each other. These areas can be strip-shaped or planar, such as polygonal, in particular triangular, square, or hexagonal. Preferably, deposition areas can be arranged or formed in a regular or irregular pattern on the deposition carrier.

[0012] The electrostatic precipitator can be designed particularly easily if the deposition electrode is plate-shaped. The deposition electrode can be flat, curved, or corrugated. "Plate-shaped" specifically means that the deposition electrode is made of a flat material. This material can have a thickness ranging from approximately 0.5 mm to approximately 3 mm. For example, the plate-shaped deposition electrode can be made of a steel or copper plate.

[0013] For easy cleaning of the air purifier, it is advantageous if the separator electrode is detachable. In particular, it can be detached from the air purifier on its own, independent of the emission electrode. For example, a single, plate-shaped separator electrode can be detached from the air purifier in this way. Such a separator electrode can be easily and reliably cleaned of collected dirt particles. For example, the separator electrode can be cleaned under running water.

[0014] The separation electrode can be made of stainless steel, which is cost-effective and sufficiently dimensionally stable. Stainless steel is also corrosion-resistant. This allows for the development of air purification devices with a long service life.

[0015] For the electrostatic precipitator to function properly, it is advantageous if the emission electrode and the deposition electrode are made of an electrically conductive material. In particular, both electrodes can be made entirely of an electrically conductive material. The electrically conductive materials used for the emission electrode and the deposition electrode can be identical or different. For example, the emission electrode can be made of tungsten, and the deposition electrode of steel, especially stainless steel.

[0016] To easily electrically charge dirt particles, it is advantageous for the emission electrode to be wire-shaped. This allows for high electric field strengths to be achieved in the vicinity of the emission electrode. Depending on whether the emission electrode is at a positive or negative potential, dirt particles can be positively charged or negatively charged by electrons emitted from the emission electrode.

[0017] The emission electrode can preferably comprise at least one emission wire, for example, two, three, or more emission wires. The effectiveness of the electrostatic precipitator for electrically charging airborne dirt particles can be determined, in particular, by the number of emission wires forming the emission elements of the emission electrode. A larger number of wires allows more dirt particles to be electrically charged.

[0018] As an alternative to or in addition to emission wires, the emission electrode can comprise multiple emission needles or blades, or be designed in the form of a mesh. Emission needles and blades with points or sharply defined edges are ideally suited for generating locally high field strengths for emitting electrically charged particles or for charging dirt particles.

[0019] Preferably, the emission electrode is made of or contains tungsten. Tungsten is particularly well-suited for emitting electrons at a sufficiently high voltage potential or for positively charging dirt particles. Furthermore, tungsten is also suitable for forming permanently stable emission elements in the form of emission wires.

[0020] According to a further preferred embodiment of the invention, the emission electrode can be arranged or configured opposite the separation electrode and to define the boundaries of the air purification channel. In other words, the emission electrode and the separation electrode are located opposite each other and each defines the boundaries of the air purification channel on one side. The air to be purified then flows between the emission electrode and the separation electrode. The air to be purified does not then have to flow around the emission electrode. This can, in particular, reduce the risk of damage to the electrode during operation of the air purifier.

[0021] It is advantageous if the emission electrode extends transversely, and especially perpendicularly, to a flow direction defined by the air purification duct. Such a design makes it possible, in particular, to create a kind of curtain for the dirt particles with the emission and separation electrodes through the generated electric field, through which the dirt particles must pass. In doing so, they are inevitably charged and moved towards the separation electrode in the electric field. The proposed orientation of the emission electrode thus allows for a particularly large effective cross-section of the electrostatic precipitator.

[0022] It is advantageous if the air purification duct has a duct inlet and a duct outlet, and if the duct inlet is in direct fluid communication with the at least one air inlet. Air to be purified can thus be drawn into the air purification device through the at least one air inlet and directed to the duct inlet of the air purification duct as described.

[0023] It is advantageous if the emission electrode is located or integrated directly after the duct inlet in the air purification duct. This design makes it possible, in particular, to electrically charge dirt particles upon entering the air purification duct and then to use the entire air purification duct as a separation section to move the electrically charged dirt particles in the electric field of the electrostatic precipitator to the separation electrode. There, they are discharged and separated.

[0024] According to a further preferred embodiment, the air purification channel may have an electrode recess opposite the separation electrode, open towards it, and the emission electrode may be arranged or formed in or in the region of the electrode recess. This design makes it particularly possible to arrange the emission electrode in a protected manner, such that it laterally delimits the air purification channel but is not directly located or formed within it. In this way, it can be ensured, in particular, that the electric field between the emission electrode and the separation electrode can form transversely to the flow direction in the air purification channel in order to move the electrically charged dirt particles transversely to the flow direction towards the separation electrode.

[0025] Preferably, the air purifier has only a single air outlet. Regardless of whether the air purifier has one, two, or more air inlets, the purified air is discharged from the air purifier through a single air outlet. This allows the purified air to be directed, in particular, into a specific room where the air purifier is located.

[0026] According to a preferred embodiment, the air conveying device may include a blower or be designed in the form of a blower and include a fan wheel for conveying air. With such an air conveying device, air can be easily conveyed through the air purifier, in particular through the air purification duct.

[0027] For ease of use of the air purifier, and especially to protect its sensitive components from damage, it is advantageous for the air purifier to comprise a housing with a bottom, top, front, back, and two sides connecting the front and back. The housing can also serve to protect the user from contact with the electrostatic precipitator, particularly the emission or separation electrode. If the housing has a circular or substantially circular or oval cross-section, the aforementioned sides, as well as the front and back, are formed or defined by housing sections that each define an angular range.

[0028] A particularly compact design of the air purifier can be achieved, in particular, if the air purifier is arranged or designed such that, during normal use, the upper surface of the housing is positioned or designed above the lower surface, against the direction of gravity. In this way, an air purifier can be designed, in particular, as a so-called tower unit. Such a tower unit typically has a height that is greater than one lateral dimension of the lower surface of the housing.

[0029] To enable the air purifier to be positioned, particularly in front of a wall, it is advantageous if at least one air outlet is located on the top of the housing. Such an air purifier can then direct the purified air upwards, i.e., against the direction of gravity during normal use, into a room.

[0030] Furthermore, it is advantageous if the at least one air inlet is located or configured on the front of the housing. This makes it possible, in particular, to position the air purifier in front of a wall or in a corner of a room. Air to be purified can then be drawn into the housing through the air inlet on the front and discharged through the at least one air outlet, for example, through an air inlet located on the top of the housing. It is especially advantageous if the at least one air inlet and the at least one air outlet are located on different sides of the housing. This effectively prevents the purified air exiting the at least one air outlet from being drawn back in through the at least one air inlet.

[0031] It is advantageous if the air conveying device has a suction inlet and a pressure outlet, and if the pressure outlet is arranged or designed to point towards the top of the housing. This design makes it possible, in particular, to convey the air conveyed by the device directly out of the housing through the at least one air outlet, provided that the at least one air outlet is located on the top of the housing.

[0032] Preferably, the suction inlet is arranged or designed to point towards one side of the housing and extends in a direction transverse, in particular perpendicular, to the at least one air inlet. This arrangement makes it possible, in particular, to direct the air into an area in front of the suction inlet in order to create the smallest possible dead volume inside the housing.

[0033] It is advantageous if the housing includes or forms a technical chamber, and if the technical chamber is located or configured in an area between two air purification ducts. For example, the air purifier can include two separate air purification ducts and thus, in particular, two electrostatic precipitators. The arrangement of the technical chamber in the manner described allows for a particularly compact design of the air purifier.

[0034] The air purifier can be made even more compact, in particular, if the technical chamber has a chamber inlet and a chamber outlet, and if the chamber outlet forms or includes at least one air outlet. Specifically, the chamber outlet can be located on or formed at the top of the housing. This makes it possible, in particular, to also close the technical chamber with the top of the housing.

[0035] Preferably, the air conveying device is arranged or designed within the technical chamber. This allows it to be protected, in particular, from external influences.

[0036] Furthermore, it is advantageous if the high-voltage source is located or integrated within the technical chamber. This provides optimal protection for the user against contact with the high voltage.

[0037] It is advantageous if the underside of the housing acts as a support for the technical components and seals the technical chamber in the direction of gravity. This allows for a particularly compact design of the air purifier. The underside of the housing can thus fulfill a dual function. Firstly, it can seal the technical chamber and the housing itself in the direction of gravity. Secondly, it can be used to support components of the air purifier, such as the air conveying system or the high-voltage power supply, and to position them precisely within the housing.

[0038] Preferably, the top of the housing seals the technical chamber against the direction of gravity. This prevents, in particular, air from escaping the technical chamber from the housing.

[0039] Advantageously, the suction inlet of the air conveying system is directed into the technical chamber. In this way, the technical chamber forms a collection space for the air to be conveyed by the air conveying system inside the housing of the air purifier.

[0040] It is advantageous if the technical chamber includes a wall and if the emission electrode is held, arranged, or formed on an outer surface of the technical chamber wall. Such a design makes it possible, for example, to use the technical chamber wall as a separation between the technical chamber and the air purification duct. With the proposed design of the technical chamber wall, no further components are required for holding or positioning the emission electrode of the at least one electrostatic precipitator.

[0041] To achieve high efficiency, it is advantageous for the air purifier to include two electrostatic precipitators. Alternatively, it can include only a single electrostatic precipitator. With two electrostatic precipitators, for example, the two air purification channels of the two electrostatic precipitators can be arranged symmetrically within the housing, relative to the technical chamber. This allows for a particularly compact design of the air purifier. Furthermore, this also reduces the overall height of the air purifier, because with identical cross-sections of the air purification channels, only half the height of the air purifier is required when two electrostatic precipitators are used instead of one.

[0042] A particularly simple and compact design of the air purification device can be achieved if the two electrostatic precipitators are arranged or configured identically or symmetrically with respect to a mirror plane running between the air purification channels. In particular, the housing can also be designed symmetrically with respect to the mirror plane. The air conveying device can, in principle, also be arranged symmetrically with respect to the mirror plane. Preferably, however, it is arranged or configured asymmetrically with respect to the mirror plane in order to optimally utilize the technical chamber as a collection space for the air to be conveyed.

[0043] A simple design for the air purifier is particularly likely if the mirror plane intersects the top and bottom of the housing.

[0044] Preferably, the air purification device comprises a single air inlet, which is assigned to the two duct inlets of the two electrostatic precipitators. This design makes it possible, in particular, to divide the air entering the housing of the air purification device through the single air inlet and requiring purification between the two electrostatic precipitators, so that air particles can then flow into the respective air purification duct either through one or the other duct inlet.

[0045] Furthermore, it can be advantageous if the air purifier includes two fluidically separated air inlets and if each air inlet is assigned a duct inlet to one of the two electrostatic precipitators. This design makes it possible, in particular, to arrange or configure air inlets on the same side of the housing, for example, the front, or even on different sides, in order to draw air into the air purifier from different directions for purification. Separate air inlets also help to reduce the flow velocity through the air inlet and thus decrease noise generation during operation of the air purifier.

[0046] Advantageously, the outlets of the two air purification ducts are fluidly connected to the suction inlet of the air conveying system. In other words, this design combines the air purified by the two air purification ducts and their respective electrostatic precipitators and directs it to the suction inlet of the air conveying system.

[0047] It is advantageous if the separation electrode extends at least partially along the rear of the housing. This design makes it possible, in particular, to lengthen the separation path for electrically charged dirt particles. Furthermore, with appropriate design, the separation electrode can also be used to redirect the air flowing through the air purification duct, especially in a direction perpendicular to the flow direction defined by the air purification duct.

[0048] To achieve the largest possible cross-section of the air purification duct and thus high efficiency of the air purifier, it is advantageous if the separation electrode and / or the emission electrode extend from the bottom to the top of the housing. This allows virtually the entire height of the air purifier to be used for air purification with at least one electrostatic precipitator.

[0049] It is advantageous if a handle is provided or designed on the separating electrode for pulling it out of the housing. This allows the user to quickly and easily detach the separating electrode from the air purifier. They simply need to grasp the electrode by the handle and then pull it out of the housing. This allows them to easily clean the electrode of accumulated dirt particles, for example, under running water or with a damp cloth. Preferably, the handle is made of an electrically insulating material, such as plastic. This prevents the user from accidentally contacting live components of the air purifier during operation.

[0050] For ease of use of the air purifier, it is advantageous if the handle protrudes from the top of the housing. This allows the user to, for example, pull the separation electrode upwards out of the housing, against the direction of gravity.

[0051] It is advantageous if the air purification duct has a duct height and a duct length, if the duct height extends in one direction from the bottom of the housing to the top of the housing, and if the duct length extends transversely, and in particular perpendicularly, to the duct height. This design makes it possible, in particular, to define an effective range for the electrostatic precipitator by means of the duct length.

[0052] It is advantageous if the two housing sides each define a housing height and a housing width, and if the duct length is greater than the housing width, in particular at least 1.2 times greater. Such a design makes it possible, in particular, to route the air purification duct not only along one housing side, but also partially along the front and / or the rear of the housing. This allows for the greatest possible effective duct length while maintaining a compact air purification unit design.

[0053] It is advantageous if the duct height is greater than the duct length. In particular, it can be at least 1.2 times greater, and even more importantly, at least 1.5 times greater. This allows for the simple design of an air purifier in the form of a tower unit with the smallest possible footprint, which is primarily determined by the shape and size of the base of the housing.

[0054] In order to achieve the longest possible effective range of the electrostatic precipitator, it is advantageous if the separation electrode extends from the front of the housing to the back of the housing.

[0055] Advantageously, the front of the housing has a closed section, and at least one air inlet is arranged or formed between this closed section and the side of the housing. This design makes it possible, in particular, to provide two air inlets, which are then separated from each other by the closed section on the front of the housing. The two air inlets can be fluidly separated from each other or fluidly connected. In the first case, the air can then be directed directly to a duct inlet of an electrostatic precipitator. In the second case, the incoming air must first be divided between two electrostatic precipitators, if these are provided.

[0056] For ease of use, it is advantageous if the air purifier includes a holding and guiding device for the separation electrode. This allows the separation electrode of the at least one electrostatic precipitator to be held in a defined manner on the air purifier. In particular, this allows a defined relative position for the separation electrode to be specified when the emission electrode is permanently mounted.

[0057] Preferably, the holding and guiding device in the area of ​​the duct inlet and outlet comprises electrode receptacles for receiving the diverging end edges of the deposition electrode. In this way, movement of the deposition electrode along the air purification duct can be prevented in a defined manner.

[0058] The air purifier can be easily constructed if the electrode receptacles are designed as grooves extending between the bottom and top of the housing. A plate-shaped deposition electrode can then be easily inserted into the two grooves.

[0059] According to a further preferred embodiment, the at least one electrostatic precipitator may include a capacitive channel section downstream of the emission electrode in the flow direction, with a field electrode that delimits the air purification channel in the region of the channel section and is located opposite the deposition electrode. This design has the particular advantage that dirt particles charged by the emission electrode are not only moved towards the deposition electrode in the region of the emission electrode by the force of the electric field, but also experience a force transverse to the flow direction through the air purification channel along the capacitive channel section and can thus be deposited on the deposition electrode along the air purification channel.The capacitive channel section serves primarily to generate a force perpendicular to the flow direction on the electrically charged dirt particles, enabling them to be deposited on the separation electrode. This prevents electrically charged particles from exiting the air purification channel through the channel outlet. Instead, it ensures that all charged dirt particles are deposited on the separation electrode.

[0060] For a simple electrical design of the air purifier, it is advantageous if the same high voltage is applied between the field electrode and the deposition electrode as between the emission electrode and the deposition electrode. This allows for the simple generation of an electric field with virtually identical field strength. Furthermore, the same high-voltage source can be used to generate the electric field in the capacitive channel section and in an emission section defined between the emission electrode and the deposition electrode.

[0061] Preferably, the channel width in the region of the channel section is constant or substantially constant. In particular, this allows the electric field between the field electrode and the deposition electrode to be maintained at a constant level.

[0062] Advantageously, the ratio of duct width to duct height lies in the range of approximately 0.02 to approximately 0.07. Preferably, the ratio is approximately 0.05. Selecting the duct width to duct height ratio for the air purification duct or the capacitive duct section as specified makes it possible, in particular, to define a cross-section of the air purification duct or the capacitive duct section such that the flow velocity of the air to be purified is slow enough and the residence time of the dirt particles in the air purification duct is long enough, especially in the capacitive duct section, and thus optimal for the most complete possible separation of all electrically charged dirt particles in the emission section onto the separation electrode. Favorable conditions are obtained, in particular, with a duct height of 500 mm and a duct width in the range of approximately 12.5 mm to approximately 35 mm.Depending on the applied high voltage between the emission electrode or field electrode on the one hand and the deposition electrode on the other, a minimum channel width should not be undercut to prevent arcing between the electrodes. At a high voltage of approximately 20 kV, the channel width should ideally be no less than about 20 mm. If the channel width is too large, this leads to a significant decrease in the electric field strength, particularly in the capacitive section of the channel. This, in turn, prevents the electric field from effectively promoting the deposition of charged dirt particles on the deposition electrode.

[0063] Furthermore, it is advantageous if the separation electrode includes a deflection zone extending from the channel section to the rear of the housing to deflect the airflow in a direction transverse, and in particular perpendicular, to the flow direction defined by the channel section. The deflection zone also has the particular advantage that charged dirt particles can reach the separation electrode not only due to the electric field force, but also when the flow is deflected from the flow direction by, for example, the straight air purification channel.

[0064] To prevent coarse dirt from entering the air purifier, and in particular from reaching the at least one electrostatic precipitator, it is advantageous if the at least one air inlet is sealed with a pre-filter. For example, the pre-filter can be in the form of a mesh fabric held in place by a filter holder.

[0065] According to a further preferred embodiment, the air purification device may include a catalyst, in particular for the reduction of ozone and / or nitrogen oxides, and / or a filter, in particular in the form of an activated carbon filter, for the reduction of ozone and / or the binding of nitrogen oxides. Such a catalyst or filter makes it possible, in particular, to reduce the ozone that is practically unavoidable during the operation of the at least one electrostatic precipitator, so that it cannot be released from the air purification device into the room whose air is to be purified. The binding of nitrogen oxides also helps to improve air quality.

[0066] Preferably, the filter is in the form of a flat pleated filter. It may be coated with or contain activated carbon. Optionally, the filter may also include a catalyst or contribute to the reduction of ozone and / or nitrogen oxides.

[0067] Advantageously, the filter and / or catalyst are arranged or configured in the direction of airflow between the air purification duct and the suction inlet. This design makes it possible, in particular, to prevent ozone and / or nitrogen oxides from entering the air handling system. Specifically, the filter and / or catalyst can be arranged or configured downstream of the electrostatic precipitator. This ensures, in particular, that the air conveyed by the air handling system has already been cleaned by the at least one electrostatic precipitator and the filter or catalyst. This minimizes contamination of the air handling system and, in particular, the technical chamber.

[0068] Preferably, the filter and / or catalyst close the chamber inlet. In this way, the air, already purified by the at least one electrostatic precipitator, is additionally passed through the filter or catalyst. Thus, the already maximally purified air enters the technical chamber and therefore the conveying system. Consequently, only purified air is conveyed by the air conveying system, so that contamination of the air conveying system can be virtually eliminated.

[0069] For ease of use and maintenance of the air purifier, it is advantageous if the filter and / or catalyst are designed or arranged to be removable from the housing through the underside. The filter and / or catalyst can be held in a designated holder on the housing. This holder can be open towards the underside of the housing to allow for easy removal of the filter and / or catalyst. The catalyst can, for example, be mounted on a catalyst support for easy and safe handling.

[0070] It is advantageous if the air purifier includes a control and / or regulating device for controlling and / or regulating its operation. For example, the control and / or regulating device can be used to set the air delivery rate of the air supply unit. Furthermore, the voltage of the high-voltage source can optionally be set to control the operation of the emission electrode.

[0071] For ease of use, it is advantageous for the air purifier to include an operating device that interacts with the control and / or regulating unit. This operating device can, in particular, take the form of an input device with which a user can, for example, set the air purifier's flow rate.

[0072] For convenient operation of the air purifier, it is advantageous if the control panel is located on the top of the housing. This makes it easily accessible and clearly visible to the user.

[0073] Ideally, the control unit includes an input device and a display device. This allows a user, for example, to specify a desired airflow rate for the air purifier, particularly by selecting a corresponding operating mode. The display device then shows the selected operating mode of the air purifier.

[0074] The air purifier can be designed to be particularly compact if the display unit incorporates or forms the input unit. For example, the operating unit can be in the form of a touchscreen.

[0075] It is advantageous if the control and / or regulating device is designed to detect damage, especially a break, of the emission electrode. In this way, it is then possible in particular to automatically deactivate the air purifier to protect it from further damage.

[0076] Furthermore, it is advantageous if the control and / or regulating device is designed to automatically switch off the air purifier when the separation electrode is removed. This prevents, in particular, the separation electrode from still being under high voltage when a user removes it from the housing.

[0077] The air purifier can be designed to be particularly compact if the control and / or regulating device is located or integrated within the technical chamber. If the technical chamber forms a pre-chamber upstream of the suction inlet of the air conveying device, as described above, the purified air conveyed through the technical chamber can also be used to cool the control and / or regulating device and, if necessary, to power a high-voltage source of the air purifier.

[0078] For a safe and compact design of the air purifier, it is advantageous if the control and / or regulating device and / or the high voltage source are arranged or designed on the technical carrier.

[0079] Furthermore, it is advantageous for the operation of the air purifier if it includes an interface device that interacts with the control and / or regulation unit for effectively connecting the air purifier to external communication devices, especially a smartphone. For example, this allows a user to control the air purifier via a smartphone or tablet, or even via the internet.

[0080] The interface can easily be implemented as a wireless interface. For example, it can be designed as a WLAN or Bluetooth interface. This design enables wireless communication between the air purifier and external control devices such as a smartphone.

[0081] Furthermore, it is advantageous if the air purifier includes at least one sensor device that interacts with the control and / or regulating unit for measuring temperature, humidity, and / or formaldehyde content in the air to be purified. This sensor device makes it possible, in particular, to acquire data and transmit it to the control and / or regulating unit, so that the latter can automatically adjust the purification and / or delivery rate of the air purifier based on measured values ​​of ambient temperature, humidity, and / or formaldehyde content.

[0082] Preferably, the control and / or regulating device is designed to control the delivery rate of the air conveying system depending on the measured air quality. The better the air quality, the lower the delivery rate of the air conveying system needs to be. If the air quality is poor, the control and / or regulating device can then automatically increase the delivery rate of the air conveying system again.

[0083] Ideally, the air conveying system is designed to convey an air volume of at least 200 m³. 3 per hour. In particular, it can be trained to convey at least approximately 500 m³ 3 per hour. This allows the volumes of typical rooms to be reliably cleaned of airborne pollutants.

[0084] Advantageously, the air purification device includes a pre-filter that seals at least one air inlet. This prevents large dirt particles from entering the air purification device and, for example, clogging the air purification duct.

[0085] For ease of use, it is advantageous if the air purifier is mobile. This eliminates the need for the user to lift and carry it from one location to another. Instead, the user can simply push the air purifier to its new location.

[0086] It is advantageous if the air purifier includes at least three, and preferably four, casters arranged or designed on the side of the unit. These can, for example, be in the form of swivel casters. This allows the air purifier to be easily moved by a user.

[0087] A compact design of the air purifier can be achieved in particular if the rollers are arranged or designed on the technical support.

[0088] The problem set out at the beginning is further solved in a method of the type described at the beginning according to the invention in that the air to be cleaned is guided through at least one air cleaning channel during cleaning, which is limited by the separation electrode.

[0089] As explained in detail above, this method allows for optimal air purification. Dirt particles that have accumulated on the separation electrode can be easily removed.

[0090] It is advantageous to apply a high voltage between the emission electrode and the deposition electrode, with a value in the range of approximately 10 kV to approximately 20 kV. High voltages in this range reliably charge dirt particles and then move them towards the deposition electrode in the electric field between the two electrodes.

[0091] Furthermore, it is advantageous if, after passing through the electric field generated by the high voltage between the emission electrode and the deposition electrode, the air to be cleaned is guided in the direction of flow through an electric field between the deposition electrode and a field electrode opposite it. As already explained, this creates a capacitive field, giving the electrically charged dirt particles more time to reach the deposition electrode and be deposited there. This improves the cleaning result.

[0092] Furthermore, the use of one of the air purification devices described above to carry out one of the air purification procedures described above is proposed.

[0093] The foregoing description therefore includes in particular the embodiments of air purification devices and methods for purifying air defined below in the form of numbered sentences: 1. Air purification device (10) with at least one air inlet (50) and at least one air outlet (54), wherein an air conveying device (30) for generating an airflow (56) from the at least one air inlet (50) to the at least one air outlet (54) and an air purification device (58) for cleaning the air forming the airflow (56) of foreign and / or dirt particles are arranged or formed between the at least one air inlet (50) and the at least one air outlet (54), wherein the air purification device (58) comprises at least one electrostatic precipitator (60) with an electrically conductive emission electrode (62) for emitting and / or generating charged particles, and an electrically conductive separation electrode (64) for separating charged dirt particles.wherein the air purification device (10) comprises at least one high voltage source (66) for generating a high voltage between the emission electrode (62) and the separation electrode (64), wherein the air purification device (10) comprises at least one air purification channel (68) for guiding the airflow (56) from the at least one air inlet (50) to the air conveying device (30), characterized in that the separation electrode (64) delimits the air purification channel (68). 2. Air purification device according to sentence 1, characterized in that the at least one electrostatic precipitator device (60) comprises only a single separation electrode (64). 3. Air purification device according to one of the preceding sentences, characterized in that the separation electrode (64) is formed in one piece, in particular monolithically. 4. Air purification device according to sentence 1 or 2, characterized in that the separation electrode (64) comprises at least two separation areas that are electrically insulated from each other or separated from each other. 5. Air purification device according to sentence 4, characterized in that the at least two separation areas are arranged or formed on a common, in particular plate-shaped, separator support. 6. Air purification device according to one of the preceding sentences, characterized in that the separation electrode (64) is plate-shaped. 7. Air purification device according to one of the preceding sentences, characterized in that the separation electrode (64) is separable from the air purification device (10). 8. Air purification device according to one of the preceding sentences, characterized in that the separation electrode (64) is made of stainless steel. 9. Air purification device according to one of the preceding sentences, characterized in that the emission electrode (62) and the separation electrode (64) are made of an electrically conductive material. 10. Air purification device according to one of the preceding sentences, characterized in that the emission electrode (62) is wire-shaped. 11. Air purification device according to one of the preceding sentences, characterized in that the emission electrode (62) comprises at least one emission wire (72), in particular two, three or more emission wires (72). 12. Air purification device according to one of sentences 1 to 10, characterized in that the emission electrode (62) comprises a plurality of emission needles or emission blades or is designed in the form of a mesh. 13. Air purification device according to one of the preceding sentences, characterized in that the emission electrode (62) is made of tungsten or contains tungsten. 14. Air purification device according to one of the preceding sentences, characterized in that the emission electrode (62) is arranged or designed opposite the separation electrode (64) and limiting the air purification channel (68). 15. Air purification device according to one of the preceding sentences, characterized in that the emission electrode (62) extends transversely, in particular vertically, to a flow direction (76) defined by the air purification channel (68). 16. Air purification device according to one of the preceding sentences, characterized in that the air purification duct (68) has a duct inlet (78) and a duct outlet (80) and that the duct inlet (78) is in direct fluid communication with the at least one air inlet (50). 17. Air purification device according to sentence 16, characterized in that the emission electrode (62) is arranged or formed directly after the duct inlet (78) in the air purification duct (68). 18. Air purification device according to one of the preceding sentences, characterized in that the air purification channel (68) has an electrode recess (82) opposite the separation electrode (64) and open towards it, and that the emission electrode (62) is arranged or formed in or in the area of ​​the electrode recess (82). 19. Air purification device according to one of the preceding sentences, characterized in that the air purification device (10) has only a single air outlet (54). 20. Air purification device according to one of the preceding sentences, characterized in that the air conveying device (30) comprises a blower (124) or is designed in the form of a blower (124) and includes a fan wheel (126) for conveying air. 21. Air purification device according to one of the preceding sentences, characterized in that the air purification device (10) comprises a housing (12) with a housing bottom (14), a housing top (16), a housing front (18), a housing rear (20) and two housing sides (22, 24) connecting the housing front (18) and the housing rear (20). 22. Air purification device according to sentence 21, characterized in that the air purification device (10) is arranged or designed such that the upper side of the housing (16) is arranged or designed above the lower side of the housing (14) against the direction of gravity (26) when the air purification device (10) is used as intended. 23. Air purification device according to sentence 21 or 22, characterized in that the at least one air outlet (54) is arranged or formed on the top of the housing (16). 24. Air purification device according to one of sentences 21 to 23, characterized in that the at least one air inlet (50) is arranged or formed on the front of the housing (18). 25. Air purification device according to one of sentences 21 to 24, characterized in that the air conveying device (30) has a suction inlet (114) and a pressure outlet (120) and that the pressure outlet (120) is arranged or designed to point towards the top of the housing (16). 26. Air purification device according to sentence 25, characterized in that the suction inlet (114) is arranged or designed in the direction towards a housing side (22) and points in a direction transverse, in particular perpendicular, to the at least one air inlet (50). 27. Air purification device according to one of sentences 21 to 26, characterized in that the housing (12) comprises or forms a technical chamber (28) and that the technical chamber (28) is arranged or formed in an area between two air purification channels (68). 28. Air purification device according to sentence 27, characterized in that the technical chamber (28) has a chamber inlet (32) and a chamber outlet (34) and that the chamber outlet (34) forms or comprises the at least one air outlet (54). 29. Air purification device according to sentence 27 or 28, characterized in that the air conveying device (30) is arranged or designed in the technical chamber (28). 30. Air purification device according to one of sentences 27 to 29, characterized in that the high voltage source (66) is arranged or formed in the technical chamber (28). 31. Air purification device according to one of sentences 27 to 30, characterized in that the lower part of the housing (14) forms a technical support (36) and closes the technical chamber (28) in the direction of gravity (26). 32. Air purification device according to one of sentences 27 to 31, characterized in that the upper side of the housing (16) closes the technical chamber (28) against the direction of gravity (26). 33. Air purification device according to one of sentences 27 to 32, characterized in that the technical chamber (28) comprises a technical chamber wall (122) and that the emission electrode (62) is held or arranged or formed on an outside of the technical chamber wall (122). 34. Air purification device according to one of the preceding sentences, characterized in that the air purification device (10) comprises two electrostatic precipitators (60). 35. Air purification device according to sentence 34, characterized in that the two electrostatic precipitator devices (60) are arranged or designed identically or symmetrically with respect to a mirror plane (128) running between the air purification channels (68). 36. Air purification device according to sentence 35, characterized in that the mirror plane (128) intersects the upper housing surface (16) and the lower housing surface (14). 37. Air purification device according to one of sentences 34 to 36, characterized in that the air purification device (10) comprises a single air inlet (50) which is assigned to the two duct inlets (78) of the two electrostatic precipitators (60). 38. Air purification device according to one of sentences 34 to 36, characterized in that the air purification device (10) comprises two fluid-effectively separated air inlets (50) and that each air inlet (50) is assigned a duct inlet (78) of one of the two electrostatic precipitator devices (60). 39. Air purification device according to one of sentences 34 to 38, characterized in that the channel outlets (80) of the two air purification channels (68) are fluidly connected to the suction inlet (114) of the air conveying device (30). 40. Air purification device according to one of sentences 21 to 39, characterized in that the separation electrode (64) extends at least partially along the rear of the housing (20). 41. Air purification device according to one of sentences 21 to 40, characterized in that the separation electrode (64) and / or the emission electrode (62) extend from the lower part of the housing (14) to the upper part of the housing (16). 42. Air purification device according to one of sentences 21 to 41, characterized in that a handle element (130) is arranged or formed on the separating electrode (64) for pulling the separating electrode (64) out of the housing (12). 43. Air purification device according to sentence 42, characterized in that the handle element (130) protrudes from the top of the housing (16). 44. Air purification device according to one of sentences 21 to 43, characterized in that the air purification duct (68) has a duct height (132) and a duct length (134), that the duct height (132) extends in a direction from the lower side of the housing (14) to the upper side of the housing (16) and that the duct length (134) extends transversely, in particular perpendicularly, to the duct height (132). 45. Air purification device according to sentence 44, characterized in that the two housing sides (22, 24) each define a housing side height (136) and a housing side width (138) and that the channel length (134) is greater than the housing side width (138), in particular at least 1.2 times greater. 46. ​​Air purification device according to sentence 44 or 45, characterized in that the duct height (132) is greater than the duct length (134), in particular at least 1.2 times greater, further in particular at least 1.5 times greater. 47. Air purification device according to one of sentences 21 to 46, characterized in that the separation electrode (64) extends from the front of the housing (18) to the rear of the housing (20). 48. Air purification device according to one of sentences 21 to 47, characterized in that the front of the housing (18) has a closed area (52) and that the at least one air inlet (50) is arranged or formed between the closed area (52) and the side of the housing (20, 22). 49. Air purification device according to one of the preceding sentences, characterized in that the air purification device (10) comprises a holding and guiding device (84) for the separation electrode (64). 50. Air purification device according to sentence 49, characterized in that the holding and guiding device (84) in the area of ​​the duct inlet (78) and the duct outlet (80) comprises electrode receptacles (86, 88) for receiving the outwardly pointing end edges (90, 92) of the separation electrode (64). 51. Air purification device according to sentence 50, characterized in that the electrode receptacles (86, 88) are formed in the form of grooves (94, 96) extending between the lower housing surface (14) and the upper housing surface (16). 52. Air purification device according to one of the preceding sentences, characterized in that the at least one electrostatic precipitator (60) comprises a capacitive channel section (98) downstream of the emission electrode (62) in the direction of flow (76) with a field electrode (100) limiting the air purification channel (68) in the area of ​​the channel section (98) and opposite the separation electrode (64). 53. Air purification device according to sentence 52, characterized in that the same high voltage is applied between the field electrode (100) and the separation electrode (64) as between the emission electrode (62) and the separation electrode (64). 54. Air purification device according to sentence 52 or 53, characterized in that a channel width (102) in the area of ​​the channel section (98) is constant or substantially constant. 55. Air purification device according to one of sentences 52 to 54, characterized in that the separating electrode (64) comprises a deflection area (104) which extends from the channel section 98() into the area of ​​the rear of the housing (20) to deflect the airflow (56) in a direction transverse, in particular perpendicular, to the flow direction (76) defined by the channel section (98). 56. Air purification device according to one of the preceding sentences, characterized in that the at least one air inlet (50) is closed with a pre-filter (106). 57. Air purification device according to one of the preceding sentences, characterized in that the air purification device (58) includes a catalyst (108), in particular for the reduction of ozone and / or nitrogen oxides, and / or a filter (110), in particular in the form of an activated carbon filter, for the reduction of ozone and / or for binding nitrogen oxides (NOₓ). x ) includes. 58. Air purification device according to sentence 57, characterized in that the filter (110) is designed in the form of a flat pleated filter. 59. Air purification device according to sentence 57 or 58, characterized in that the filter (110) and / or the catalyst (108) are arranged or formed in the direction of flow between the air purification channel (68) and the suction inlet (114). 60. Air purification device according to one of sentences 57 to 59, characterized in that the filter (110) and / or the catalyst (108) close the chamber inlet (34). 61. Air purification device according to one of sentences 57 to 60, characterized in that the filter (110) and / or the catalyst (108) are arranged or designed to be removable from the housing (12) through the underside of the housing (14). 62. Air purifier according to one of the preceding sentences, characterized in that the air purifier (10) comprises a control and / or regulating device (140) for controlling and / or regulating the operation of the air purifier (10). 63. Air purification device according to sentence 62, characterized in that the air purification device (10) comprises an operating device (142) that interacts with the control and / or regulating device (140). 64. Air purification device according to sentence 63, characterized in that the operating device (142) is arranged or formed on the top of the housing (16). 65. Air purification device according to sentence 63 or 64, characterized in that the operating device (142) comprises an input device (144) and a display device (146). 66. Air purification device according to sentence 65, characterized in that the display device (146) comprises or forms the input device (144). 67. Air purification device according to one of sentences 62 to 66, characterized in that the control and / or regulating device (140) is designed to detect damage, in particular a break, of the emission electrode (62). 68. Air purification device according to one of sentences 62 to 67, characterized in that the control and / or regulating device (140) is designed to automatically switch off the air purification device (10) when the separating electrode (64) is removed. 69. Air purification device according to one of sentences 62 to 68, characterized in that the control and / or regulating device (140) is arranged or designed in the technical chamber (28). 70. Air purification device according to one of sentences 62 to 69, characterized in that the control and / or regulating device (140) and / or the high voltage source (66) are arranged or formed on the technology carrier (36). 71. Air purifier according to one of sentences 62 to 70, characterized in that the air purifier (10) comprises an interface device (148) that interacts with the control and / or regulating device (140) for connecting the air purifier (10) to external communication devices (150), in particular to a smartphone (152) for control purposes. 72. Air purification device according to sentence 71, characterized in that the interface device (148) is designed in the form of a radio interface device, in particular in the form of a WLAN or Bluetooth interface device. 73. Air purification device according to one of sentences 62 to 72, characterized in that the air purification device (10) comprises at least one sensor device (154) cooperating with the control and / or regulating device (140) for measuring a temperature, a humidity and / or a formaldehyde content in the air to be purified. 74. Air purification device according to one of sentences 62 to 72, characterized in that the control and / or regulating device (140) is designed to control a delivery rate of the air conveying device (30) depending on a measured air quality. 75. Air purification device according to one of the preceding sentences, characterized in that the air conveying device (30) is designed to convey an air volume of at least 200 m³ 3 per hour, especially from at least about 500 m 3 per hour. 76. Air purification device according to one of the preceding sentences, characterized in that the air purification device (10) comprises a pre-filter (106) and that the pre-filter (106) closes the at least one air inlet (50). 77. Air purification device according to one of the preceding sentences, characterized in that the air purification device (10) is designed to be mobile. 78. Air purification device according to sentence 77, characterized in that the air purification device (10) comprises at least three, in particular four, rollers (38) arranged or formed on the underside (14) of the device, in particular in the form of swivel casters (40). 79. Air purification device according to sentence 78, characterized in that the rollers (38) are arranged or formed on the technical carrier (36). 80. A method for cleaning air, in which the air to be cleaned is conveyed through an electrostatic precipitator (60) with an electrically conductive emission electrode (62) for emitting and / or generating charged particles and an electrically conductive separation electrode (64) for separating charged dirt particles, wherein a high voltage is applied between the emission electrode (62) and the separation electrode (64), characterized in that the air to be cleaned is passed through at least one air cleaning channel (68) during cleaning, which is delimited by the separation electrode (64). 81. Method according to sentence 80, characterized in that a high voltage with a value in the range of about 10 kV to about 20 kV is applied between the emission electrode (62) and the deposition electrode (64). 82. Method according to sentence 80 or 81, characterized in that the air to be cleaned is guided in the direction of flow (76) through an electric field between the separation electrode (64) and a field electrode (100) opposite it after passing through the electric field formed by the high voltage between the emission electrode (62) and the separation electrode (64). 83. Use of an air purification device according to one of sentences 1 to 69 for carrying out a procedure according to one of sentences 80 to 82.

[0094] The following description of preferred embodiments of the invention, in conjunction with the drawings, serves for further explanation. The drawings show: Fig. 1: A schematic perspective overview of an exemplary embodiment of an air purification device; Fig. 2: a schematic partial exploded view of the arrangement made of Fig. 1; Fig. 3: a schematic representation of the arrangement Fig. 1 when withdrawing the deposition electrodes; Fig. 4: a partially broken perspective view of the arrangement Fig. 3; Fig. 5: another schematic, partially exploded view of the arrangement made of Fig. 2; Fig. 6: a sectional view along line 6-6 in Fig. 7; Fig. 7: a sectional view along line 7-7 in Fig. 6; Fig. 8: a sectional view along line 8-8 in Fig. 7; Fig. 9: a schematic representation of the air purification duct with associated components of the air purification device; Fig. 10: a schematic representation of the functional elements of the air purifier; and Fig. 11: a schematic representation of the interaction between the control and / or regulating device of the air purifier and a sensor device.

[0095] In the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. Figure 8 schematically depicts an air purification device designated as a whole by reference numeral 10.

[0096] The air purification device 10 comprises a substantially cuboid housing 12 with a housing base 14, a housing top 16 arranged opposite the housing base 14, a housing front 18, a housing back 20 and two housing sides 22 and 24 connecting the housing front 18 and the housing back 20. In the embodiment shown in the figures, the vertical edges of the housing 12 are rounded.

[0097] The air purifier 10 is arranged or designed such that, when the air purifier 10 is used as intended, the upper side of the housing 16 is arranged or designed above the lower side of the housing 14 in the opposite direction of gravity 26 symbolized by an arrow.

[0098] Inside the housing 12, a technical chamber 28 is arranged or formed. An air conveying device 30 is arranged or formed in the technical chamber 28.

[0099] The technical chamber 28 has a chamber inlet 32 ​​and a chamber outlet 34. The chamber inlet 32 ​​is designed to point towards the rear of the housing 20. The chamber outlet 34, on the other hand, points towards the top of the housing 16.

[0100] The underside of the housing 14 forms a technical support 36 and closes off the technical chamber 28 in the direction of gravity 26.

[0101] The upper part of the housing 16 closes off the technical chamber 28 against the direction of gravity 26.

[0102] The air purification device 10, shown as an example in the figures, is designed to be mobile. It comprises at least three, namely four, casters 38 arranged or formed on the underside 14 of the housing. In the embodiment shown in the figures, the four casters 38 are identical, namely in the form of swivel casters 40.

[0103] The swivel casters 40 each comprise two wheel discs 42, which are rotatably mounted about a pivot axis 14 running parallel to the underside 14 of the housing and are connected to each other in a rotationally fixed manner. Furthermore, the swivel casters 40 are rotatable about a steering axis 46, which is oriented transversely, i.e., perpendicularly, to the underside of the housing and thus, during the intended use of the air purifier 10, parallel to the direction of gravity 26. The described design makes it possible to rotate the wheel discs 42 of each swivel caster 40 together about the steering axis 46, in order to push the air purifier 10 in any direction over a contact surface formed, for example, by a base 48.

[0104] The four rollers 38 are arranged or designed on the technology carrier 36 in the manner described.

[0105] The air purifier 10 is designed for cleaning air. The air is cleaned within the housing 12. Air is introduced into the housing 12 through at least one air inlet 50. The embodiment shown in the figures comprises two air inlets 50 that are fluidly separated from each other. The two air inlets 50 are arranged or formed on the front of the housing 18.

[0106] Furthermore, a closed area 52 is formed on the front of the housing 18, specifically between the two air inlets 50. The closed area extends from the bottom of the housing 14 to the top of the housing 16. The two air inlets 50 are arranged or formed between the closed area 52 and each of the two housing sides 20 and 22, respectively.

[0107] The air purification device 10 further comprises at least one air outlet 54. In the embodiment shown in the figures, only a single air outlet 54 is provided, which is arranged or formed on the upper side of the housing 16.

[0108] The air conveying device 30 is arranged or designed to generate an airflow 56 from the at least one air inlet 50 to the at least one air outlet 54 in a fluid-effective manner between the at least one air inlet 50 and the at least one air outlet 54.

[0109] As schematically in Fig. As shown in Figure 10, the air purification device 10 further comprises an air purification device 58 for cleaning the air forming the airflow 56 of foreign and / or dirt particles.

[0110] The air purification device 58 comprises at least one electrostatic precipitator 60. The embodiment of the air purification device 10 shown schematically in the figures comprises two electrostatic precipitators 60.

[0111] Each electrostatic precipitator unit 60 comprises, as schematically shown in Fig. Figure 9 shows an emission electrode 62 for emitting or generating charged particles and an electrically conductive deposition electrode 64 for depositing charged dirt particles.

[0112] The air purification device 10 further comprises at least one high voltage source 66 for generating a high voltage between the emission electrode 62 and the deposition electrode 64.

[0113] The air purification device 10 further comprises at least one air purification channel 68, as schematically shown in the Fig. 9 and Fig. Figure 10 shows the arrangement for guiding the airflow 56 from the at least one air inlet 50 to the air conveying device 30. The separating electrode 64 of the electrostatic precipitator 60 is arranged or designed such that it spatially delimits the air purification channel 68. Thus, the air to be purified, i.e., the airflow 56 generated by the air conveying device 30, flows through the air purification channel 68 along the separating electrode 64.

[0114] In the embodiment shown in the figures, the air purification device 10 comprises two electrostatic precipitators 60, but only a single high-voltage source 66, which serves to provide a high voltage for both electrostatic precipitators 60.

[0115] In the embodiment shown in the figures, each of the electrostatic precipitator devices 60 comprises only a single deposition electrode 64.

[0116] The emission electrode 62, in conjunction with the separation electrode 64, forms an emission section 70 of the air purification channel 68.

[0117] The deposition electrode 64 is formed in one piece, namely monolithically. It is plate-shaped and can be separated from the air purification device, as is shown schematically in particular in Figures three and four.

[0118] The deposition electrode 64 is made of an electrically conductive material. In the embodiment shown in the figures, the deposition electrode 64 is made of stainless steel.

[0119] The emission electrode 62 is also made of an electrically conductive material. In the embodiment shown in the figures, the emission electrode 62 is made of tungsten or contains tungsten. It is also wire-shaped and comprises at least one emission wire 72. In the embodiment shown in the figures, the emission electrode 62 comprises three emission wires 72. These are parallel to each other and stretched at a constant distance 74 from the deposition electrode 64.

[0120] In an alternative embodiment not shown in the figures, the emission electrode 62 comprises a plurality of emission needles or emission blades. In another embodiment not shown, it is designed in the form of a wire mesh.

[0121] Instead of three emission wires 72, a single emission wire 72 can alternatively be provided. Two, four or more emission wires can also be used to form the emission electrode 62.

[0122] The emission wires 72 run parallel to the direction of gravity 26 when the air purifier 10 is used as intended. They are therefore essentially stretched from the top of the housing 16 to the bottom of the housing 14. They thus run, as can be seen particularly well in Fig. 9 can be seen, perpendicular to the airflow 56. Thus, the airflow 56, and therefore the air to be cleaned, flows along the wire-shaped emission electrode 62 into the air purification channel 68. In this way, dirt particles are electrically charged along the emission section 70 upon entering the air purification channel 68 and then have the entire flow path along the air purification channel 68 to migrate in the electric field towards the separation electrode 64.

[0123] As already explained, the emission electrode 62 is arranged opposite the separation electrode 64 and bounds the air purification channel 68. It also extends transversely, namely perpendicularly as described, to a flow direction 76 defined by the air purification channel 68.

[0124] The air purification duct 68 has a duct inlet 78 and a duct outlet 80. To allow air to be purified to enter the air purification duct 68, the duct inlet 78 is in direct fluid communication with at least one air inlet 50.

[0125] The emission electrode 62 is located directly after the duct inlet 78 in the air purification duct 68. To prevent the emission electrode 62 from protruding into the air purification duct 68, the duct has an electrode recess 82 opposite the separation electrode 64, which opens towards it. The emission electrode 62 is located in or in the area of ​​the electrode recess 82.

[0126] The air purification device 10 further comprises a holding and guiding device 84 for the separation electrode 64. It includes electrode receptacles 86 and 88 respectively in the area of ​​the duct inlet 78 and in the area of ​​the duct outlet 80 for receiving the diverging end edges 90 and 92 respectively of the separation electrode 64.

[0127] The electrode receptacles 86, 88 are formed in the form of grooves 94 and 96 respectively extending between the lower housing surface 14 and the upper housing surface 16.

[0128] The at least one electrostatic precipitator 60 of the air purification device 10 further comprises a capacitive channel section 98 downstream of the emission electrode 62 in the flow direction 76 and thus downstream of the emission section 70. The capacitive channel section 98 comprises a field electrode 100 which limits the air purification channel 68 in the area of ​​the channel section 98 and is opposite the separation electrode 64.

[0129] The field electrode 100 is at the same voltage potential as the emission electrode 62. Therefore, the same high voltage is present between the field electrode 100 and the deposition electrode 64 as between the emission electrode 62 and the deposition electrode 64.

[0130] The channel width 102 in the area of ​​the capacitive channel section 98 is constant or essentially constant. In the embodiment shown in the figures, it has a value of 25 mm. The ratio of channel width 102 to channel height 132 in the illustrated embodiment is in the range of approximately 0.02 to approximately 0.07. It is approximately 0.05.

[0131] Favorable conditions result particularly with a channel height of 132 mm and a channel width of 102 mm in a range of approximately 12.5 mm to approximately 35 mm.

[0132] Depending on the applied high voltage between the emission electrode 62 or the field electrode 100 on the one hand and the deposition electrode 64 on the other, a minimum channel width 102 results, which should not be undercut to avoid flashovers between the electrodes 62, 100 on the one hand and 64 on the other. At a high voltage of approximately 20 kV, the channel width 102 should ideally not be less than approximately 20 mm. If the channel width 102 is chosen to be too large, this leads to a significant decrease in the electric field strength, particularly in the region of the capacitive channel section 98, which in turn means that the supporting effect of the electric field for the deposition of the charged dirt particles on the deposition electrode 64 can no longer be achieved.

[0133] By appropriately selecting the ratio of channel width 102 to channel height 132 for the air purification channel 68 or the capacitive channel section 98, a cross-section of the air purification channel 68 or the capacitive channel section 98 can be specified such that the flow velocity of the air to be purified is low enough and the residence time of the dirt particles in the air purification channel 68 is correspondingly long enough, especially in the capacitive channel section 98, so that the most complete possible separation of all electrically charged dirt particles in the area of ​​the emission section 70 on the separation electrode 64 can be achieved.

[0134] The deposition electrode 64 comprises a deflection section 104, which extends from the capacitive channel section 98 into the area of ​​the rear of the housing 20, almost reaching the electrode receptacle 88. The deflection section 104 serves to deflect the airflow 56 in a direction transverse, in particular perpendicular, to the flow direction 76 defined by the capacitive channel section 98, which runs essentially transversely, namely perpendicular to a line connecting the front of the housing 18 and the rear of the housing 20, and thus approximately parallel to the two housing sides 22 and 24.

[0135] The at least one air inlet 50 is closed with a pre-filter 106. This prevents coarse dirt from entering the air purification duct 68 through the air inlet 50.

[0136] In the embodiments shown in the figures, the air purification device 58 comprises a catalyst 108 and / or a filter 110. These are enclosed by a common filter unit 112. The catalyst 108 is specifically designed for the reduction of ozone and / or nitrogen oxides (NOx). x Filter 110 is specifically designed as an activated carbon filter for the reduction of ozone and / or the binding of nitrogen oxides. Filter 110 is designed as a flat pleated filter.

[0137] The filter unit 112 with the filter 110 or the catalyst 108 is arranged or designed in the flow direction 76 between the air cleaning channel 68 and the air conveying device 30, namely upstream of a suction inlet 114 of the air conveying device 30.

[0138] The filter unit 112, comprising the filter 110 and the catalyst 108, closes the chamber inlet 34. This ensures that the air to be cleaned, after passing through the air purification duct 68, must flow through the filter unit 112 to enter the technical chamber 28. In this way, ozone and nitrogen oxides, in particular, can be reliably broken down or bound before they come into contact with the air conveying device 30 and are conveyed out of the housing.

[0139] The filter unit 112, comprising the filter 110 and the catalyst 108, is arranged or designed to be removable from the housing 12 through the lower housing surface 14. For this purpose, an insertion opening 116 is arranged or designed on the lower housing surface 14, through which the filter unit 112 can be inserted into a correspondingly designed filter unit receptacle 118 and, if necessary, removed again, for example, to replace the filter unit 112 when it is worn out.

[0140] The air purification device 10 according to the embodiment shown in the figures comprises only a single air outlet 54.

[0141] As especially in Fig. As can be clearly seen in Figure 7, the air conveying device 30 is arranged or configured in the technical chamber 29 such that a pressure outlet 120 is open or arranged or configured in the direction of the housing top 16. The pressure outlet 120 of the air conveying device is thus in direct fluid communication with the air outlet 54. In the embodiment shown in the figures, no further filter device or filter elements are installed. The air to be cleaned by the air purifier 10 is cleaned after passing through the filter unit 112 and after entering the technical chamber 28.

[0142] The suction inlet 114 of the air conveying device 30 is arranged or designed to point towards the housing side 22. It thus points in a direction transverse, in particular perpendicular, to the at least one air inlet 50.

[0143] The technical chamber 28 comprises a technical chamber wall 122, which delimits the technical chamber in the direction of the two air purification channels 68. The emission electrode 62 is held, arranged, or formed on an outer side of the same.

[0144] The air conveying device 30 comprises a blower 124 or is designed in the form of a blower 124. The blower 124 includes a fan wheel 126 (not shown in detail in the figures) for conveying the air to be cleaned.

[0145] The exemplary embodiment of an air purification device 10 shown in the figures comprises two of the described electrostatic precipitators 60. These are arranged or configured identically or symmetrically with respect to a mirror plane 128 running between the air purification channels 68. The mirror plane 128 intersects the upper housing surface 16 and the lower housing surface 14. It also intersects the front housing surface 18 and the rear housing surface 20. It runs essentially parallel to the housing sides 22 and 24, which, in the embodiments shown in the figures, are not flat but are slightly convex and curved away from the technical chamber 28.

[0146] In an alternative embodiment of an air purification device 10, only a single air inlet 50 is provided. This is then fluidly connected to two channel inlets 78 if the air purification device 10 comprises two electrostatic precipitators 60, as in the embodiment shown in the figures.

[0147] In the embodiment shown in the figures, as already explained, two fluidically separated air inlets 50 are provided. Each air inlet 50 is assigned a channel inlet 78 of one of the two electrostatic precipitators 60.

[0148] The two channel outlets 80 of the two air purification channels 68 are fluidly connected to the suction inlet 114 of the air conveying device 30. How well in Fig. As can be seen in Figure 8, the air streams 56, which exit from the duct outlets 80 of the two electrostatic precipitators 60, merge before passing through the filter unit 112.

[0149] By providing the deflection area 104, the deposition electrode 64 extends at least partially along the rear of the housing 20. Fig. Figure 8 clearly shows that the deposition electrodes 64 of the two electrostatic precipitators 60 each extend over approximately one-third of the total length of the rear of the housing 20. The end edges 92 of the two deposition electrodes 64 point towards each other, but are spaced apart from one another.

[0150] To enable the most efficient air purification possible with the air purifier 10, the separation electrode 64 and the emission electrode 62 extend essentially from the top of the housing 16 to the bottom of the housing 14. This allows the air purification channel 68 of the electrostatic precipitator 60 to extend almost over the entire height of the air purifier 10. This ensures that the largest possible volume flow can be conveyed for purification through the two air purification channels 68 of the two electrostatic precipitators 60.

[0151] For easy cleaning of the separation electrodes 64, these are designed to be removable from the air purifier 10. They can be completely pulled out of the housing 12 through slots in the housing top 16 using the handles 130 attached to them. The handles 130 are made of an electrically insulating material. They protrude from the housing top 16 for easy handling by the user.

[0152] The air purification duct 68 has a duct height 132 and a duct length 134. The duct height 132 extends in one direction from the lower housing 14 to the upper housing 16. The duct length 134 extends transversely, in particular perpendicularly, to the duct height 132. The duct length 134 is defined by a distance between the duct inlet 78 and the duct outlet 80 and thus specifies a purification path for the airflow 56 through the air purification duct 68.

[0153] In the embodiment shown in the figures, the two housing sides 22, 24 define a housing side height 136 and a housing side width 138. The channel length 134 is greater than the housing side width 138 in the embodiment shown in the figures. In particular, it is more than 1.2 times greater.

[0154] The channel height 132 is also greater than the channel length 134. In the embodiment shown in the figures, the channel height 132 is at least 1.2 times greater than the channel length 134, and in particular, at least 1.5 times greater.

[0155] The total channel length 134 is determined by the length of the deposition electrode 64, which extends from the front of the housing 18, namely from the channel inlet 78, to the rear of the housing 20, namely the channel outlet 80.

[0156] The air purifier 10 further comprises a control and / or regulating device 140 for controlling and / or regulating the operation of the air purifier 10. It is arranged or configured in the technical chamber 20. In order to give the air purifier 10 a low center of gravity, the control and / or regulating device 140 is arranged or configured on the technical support 36.

[0157] The high voltage required by the two electrostatic precipitator devices 60 is generated by the high-voltage source 66, which is also arranged on the technical carrier 36. It is designed to generate a high voltage of up to approximately 20 kV. A positive terminal of the high-voltage source is electrically connected to the emission electrode 62, and a negative terminal of the high-voltage source 66 is connected to the deposition electrode 64.

[0158] The high-voltage source 66 includes a power supply unit with a power consumption of approximately 25 watts. This allows currents in the range of 1 mA to be generated.

[0159] The high-voltage source 66 is designed to be controllable and is effectively connected to the control and / or regulation device 140. This makes it possible, in particular, to reduce the high voltage to 15 kV, thereby significantly reducing power consumption.

[0160] By setting the emission electrode 62 to a positive potential relative to the separation electrode 64, ozone production is significantly reduced compared to emission electrodes set to a negative potential. This also significantly reduces the energy required for ozone reduction in the proposed air purifier 10. The service life of the filter unit 112 with catalyst 108 or filter 110 can thus be considerably extended.

[0161] The control and / or regulating device 140 is also specifically designed to detect damage, in particular a break, of the emission electrode 62. In particular, current monitoring of the high-voltage source 66 may be provided to detect a break, for example, of the emission wire 72.

[0162] The control and / or regulating device 140 is further designed to automatically switch off the air purifier 10 when the separating electrode 64 is removed.

[0163] As explained, the arrangement of the technical chamber 28 in an area between the two air purification channels 68 of the two electrostatic precipitators 60 makes it possible to design the air purification device 10 in a compact form.

[0164] Arranging and designing the technical chamber 28 with its chamber outlet 34 in such a way that the chamber outlet 34 forms or comprises the only air outlet 54 leads to a compact design of the air purification device.

[0165] The air purifier 10 further comprises an operating device 142 that interacts with the control and / or regulating device 140. This is, as shown in particular in the Fig. 1, Fig. 2, Fig. 3 to Fig. 4 clearly visible, arranged or formed on the top of the housing 16.

[0166] The operating device 142 comprises an input device 144 and a display device 146. In the embodiment shown in the figures, the display device 146 comprises or forms the input device 144. The display device 146 is designed in the form of a touchscreen and thus forms a human-machine interface (HMI interface).

[0167] The air purifier 10 further comprises an interface device 148 that interacts with the control and / or regulation device 140 for connecting the air purifier 10 to external communication devices 150 for control purposes. These can be, for example, in the form of a smartphone 152, a tablet computer or a smartwatch.

[0168] In the embodiment shown in the figures, the interface device 148 is designed as a radio interface device. It can optionally be designed as a WLAN or Bluetooth interface device.

[0169] As in Fig.As shown schematically in Figure 11, the air purifier 10 comprises at least one sensor device 154 that interacts with the control and / or regulating device 140. In particular, the sensor device 154 may be configured to measure an ambient temperature or room temperature, or the temperature of the air flowing through the air purification duct 68 to be purified. The sensor device may be located on the outside of the housing 12 or inside it. Furthermore, the sensor device 154 may also be configured to determine the humidity and / or formaldehyde content of the air to be purified. For this purpose, the sensor device 154 is located in the area between the air inlet 50 and the duct inlet 78.

[0170] The control and / or regulating device 140 is designed to control the delivery rate of the air conveying device 30 depending on the measured air quality. In particular, if measured values ​​are transmitted to the control and / or regulating device 140 by one or more sensor devices 154 that are below predefined limit values ​​stored in the control and / or regulating device 140, the control and / or regulating device 140 can automatically reduce the delivery rate of the air conveying device 30 in order to save energy during the operation of the air purifier 10.

[0171] In the embodiment shown in the figures, the air conveying device 30 is designed to convey an air volume of at least 200 m³. 3 per hour. In particular, it can also be designed to move an air volume of at least approximately 500 m³. 3to pump air per hour. Pumping such air volumes makes it possible to clean rooms of typical size with a single air purifier.

[0172] The advantageous embodiments and exemplary embodiments of air purification devices 10 described above enable, in particular, the purification of air. In such a purification process, the air to be purified is conveyed through one or more electrostatic precipitators 60, wherein the electrostatic precipitator 60 comprises an electrically conductive emission electrode 62 for emitting and / or generating charged particles and an electrically conductive separation electrode 64 for separating charged dirt particles.

[0173] A high voltage is applied between the emission electrode 62 and the separation electrode. During cleaning, the air to be purified is passed through at least one air purification channel 68, which is delimited by the separation electrode 64. This method enables the simple purification of air. The separation electrode 64 can thus also be used, in particular, to guide the air to be purified in a defined manner.

[0174] In the proposed purification process, a high voltage with a value in the range of approximately 10 kV to approximately 20 kV is applied between the emission electrode 62 and the deposition electrode 64. The worse the air quality, the higher the value of the high voltage is chosen.

[0175] Furthermore, after passing through the electric field generated by the high voltage between the emission electrode 62 and the deposition electrode 64, the air to be cleaned is guided in the flow direction 76 through an electric field between the deposition electrode 64 and a field electrode 100 opposite it. In this way, the deposition distance can be easily extended. Electrically charged dirt particles can migrate in the electric field between the deposition electrode 64 and the field electrode 100 to the deposition electrode 64 and be electrically neutralized there.

[0176] The air purifier 10 also enables the performance of one of the described methods for cleaning air.

[0177] The described examples of air purifier designs, as explained, allow for a simple and compact construction. They can be placed in a space-saving manner, especially in front of a wall and, if necessary, also in a corner of the room.

[0178] Furthermore, the electrostatic precipitator 60 enables the removal and separation of dirt particles from the air without expensive filter elements. Separated dirt particles, which accumulate on the separation electrode 64 as described, can be easily removed by pulling the separation electrode 64 out of the housing 12 of the air purifier 10. The separation electrode 64 can be cleaned, in particular, under running water or with a damp cloth. After cleaning, it can be reinserted into the housing 12. Reference symbol list 10 air purifiers 12 cases 14 Bottom of housing 16 Top of case 18 Front of case 20 Rear of case 22 Case side 24 Case side 26 Direction of gravity 28 Technical Chamber 30 Air conveying system 32 Chamber entrance 34 Chamber outlet 36 technology carriers 38 rolls 40 swivel caster 42 Wheel disc 44 axis of rotation 46 Steering axle 48 Floor 50 air intake 52 enclosed area 54 Air outlet 56 Airflow 58 Air purification device 60 Electrostatic precipitator 62 Emission electrode 64 Deposition electrode 66 High-voltage source 68 Air purification duct 70 Emission section 72 Emission wire 74 distance 76 Flow direction 78 Channel Inlet 80 Channel outlet 82 Electrode recess 84 Holding and guiding device 86 Electrode uptake 88 Electrode attachment 90 End edge 92 End edge 94 Nut 96 Nut 98 capacitive channel section 100 field electrode 102 channel width 104 Deflection range 106 pre-filters 108 Catalyst 110 filters 112 filter unit 114 Intake 116 Insertion opening 118 Filter unit intake 120 Pressure outlet 122 Technical Chamber Wall 124 blowers 126 fan wheel 128 Mirror plane 130 handle element 132 canal height 134 channel length 136 Case side height 138 mm case side width 140 Control and / or regulating device 142 Control unit 144 Input device 146 Display unit 148 Interface setup 150 communication devices 152 Smartphone 154 Sensor device QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 2013 / 0047858 A1 [0003, 0004]

Claims

[1] Air purification device (10) with at least one air inlet (50) and at least one air outlet (54), wherein an air conveying device (30) for generating an airflow (56) from the at least one air inlet (50) to the at least one air outlet (54) and an air purification device (58) for cleaning the air forming the airflow (56) of foreign and / or dirt particles are arranged or formed between the at least one air inlet (50) and the at least one air outlet (54), wherein the air purification device (58) comprises at least one electrostatic precipitator (60) with an electrically conductive emission electrode (62) for emitting and / or generating charged particles, and an electrically conductive separation electrode (64) for separating charged dirt particles.wherein the air purification device (10) comprises at least one high voltage source (66) for generating a high voltage between the emission electrode (62) and the separation electrode (64), wherein the air purification device (10) comprises at least one air purification channel (68) for guiding the airflow (56) from the at least one air inlet (50) to the air conveying device (30), , characterized by , that the separation electrode (64) limits the air purification channel (68). [2] Air purifier according to claim 1, characterized by , that the at least one electrostatic precipitator (60) comprises only a single separation electrode (64). [3] Air purifier according to any one of the preceding claims, characterized by , that the deposition electrode (64) is formed in one piece, in particular monolithically. [4] Air purifier according to claim 1 or 2, characterized by, that the deposition electrode (64) comprises at least two electrically insulated or separated deposition areas, wherein in particular the at least two deposition areas are arranged or formed on a common, in particular plate-shaped, deposition support. [5] Air purifier according to any one of the preceding claims, characterized by , that the deposition electrode (64) is plate-shaped. [6] Air purifier according to any one of the preceding claims, characterized by , that the separating electrode (64) is separable from the air purification device (10). [7] Air purifier according to any one of the preceding claims, characterized by , that the deposition electrode (64) is made of stainless steel. [8] Air purifier according to any one of the preceding claims, characterized by, that the emission electrode (62) comprises at least one emission wire (72), in particular two, three or more emission wires (72), and / or is formed in the form of a plurality of emission needles or emission blades or in the form of a mesh. [9] Air purifier according to any one of the preceding claims, characterized by , that the emission electrode (62) is arranged or designed opposite the deposition electrode (64) and limiting the air purification channel (68). [10] Air purifier according to any one of the preceding claims, characterized by , that the emission electrode (62) extends transversely, in particular perpendicularly, to a flow direction (76) defined by the air purification channel (68). [11] Air purifier according to any one of the preceding claims, characterized by, that the air purification duct (68) has a duct inlet (78) and a duct outlet (80) and that the duct inlet (78) is in direct fluid communication with the at least one air inlet (50), wherein in particular the emission electrode (62) is arranged or formed directly after the duct inlet (78) in the air purification duct (68). [12] Air purifier according to any one of the preceding claims, characterized by , that the air purification channel (68) has an electrode recess (82) opposite the separation electrode (64) and open towards it, and that the emission electrode (62) is arranged or formed in or in the area of ​​the electrode recess (82). [13] Air purifier according to any one of the preceding claims, characterized by that the air purifier (10) has only a single air outlet (54). [14] Air purifier according to any one of the preceding claims, characterized by, that the air purification device (10) comprises a housing (12) with a housing bottom (14), a housing top (16), a housing front (18), a housing rear (20) and two housing sides (22, 24) connecting the housing front (18) and the housing rear (20), wherein in particular a) the air purifier (10) is arranged or designed such that, during the intended use of the air purifier (10), the upper housing surface (16) is arranged or designed above the lower housing surface (14) against the direction of gravity (26), and / or b) which has at least one air outlet (54) arranged or formed on the top of the housing (16) and / or c) which has at least one air inlet (50) arranged or formed on the front of the housing (18). [15] Air purification device according to claim 14, characterized by, that the air conveying device (30) has a suction inlet (114) and a pressure outlet (120) and that the pressure outlet (120) is arranged or designed in the direction towards the top of the housing (16), wherein in particular the suction inlet (114) is arranged or designed in the direction towards a housing side (22) and points in a direction transverse, in particular perpendicular, to the at least one air inlet (50). [16] Air purification device according to claim 14 or 15, characterized by , that the housing (12) comprises or forms a technical chamber (28) and that the technical chamber (28) is arranged or formed in an area between two air purification ducts (68), particularly a) the technical chamber (28) has a chamber inlet (32) and a chamber outlet (34) and the chamber outlet (34) forms or includes at least one air outlet (54) and / or b) the air conveying device (30) is arranged or designed in the technical chamber (28) and / or c) the high voltage source (66) is arranged or formed in the technical chamber (28) and / or d) the underside of the housing (14) forms a technical support (36) and closes the technical chamber (28) in the direction of gravity (26). and / or e) the housing top (16) closes the technical chamber (28) against the direction of gravity (26). and / or f) the technical chamber (28) comprises a technical chamber wall (122) and that the emission electrode (62) is held, arranged or formed on an outside of the technical chamber wall (122). [17] Air purifier according to any one of the preceding claims, characterized by , that the air purification device (10) comprises two electrostatic precipitators (60), particularly a) the two electrostatic precipitator devices (60) are arranged or designed identically or symmetrically with respect to a mirror plane (128) running between the air purification channels (68). and / or b) the air purification device (10) comprises a single air inlet (50) which is assigned to the two duct inlets (78) of the two electrostatic precipitators (60) and / or c) the air purification device (10) comprises two fluid-effectively separated air inlets (50) and wherein each air inlet (50) is assigned a duct inlet (78) of one of the two electrostatic precipitators (60). and / or d) the duct outlets (80) of the two air purification ducts (68) are fluidly connected to the suction inlet (114) of the air conveying device (30). [18] Air purification device according to any one of claims 14 to 17, characterized by , that the deposition electrode (64) a) extends at least partially along the rear of the housing (20) and / or b) and / or extend the emission electrode (62) from the bottom of the housing (14) to the top of the housing (16). [19] Air purification device according to any one of claims 14 to 18, characterized by , that a handle element (130) is arranged or formed on the deposition electrode (64) for pulling the deposition electrode (64) out of the housing (12), wherein in particular the handle element (130) protrudes from the top of the housing (16). [20] Air purification device according to any one of claims 14 to 19, characterized by , that the air purification duct (68) has a duct height (132) and a duct length (134), that the duct height (132) extends in a direction from the bottom of the housing (14) to the top of the housing (16) and that the duct length (134) extends transversely, in particular perpendicularly, to the duct height (132), particularly a) the two housing sides (22, 24) each define a housing side height (136) and a housing side width (138) and the channel length (134) is greater than the housing side width (138), in particular at least 1.2 times greater, and / or b) the channel height (132) is greater than the channel length (134), in particular at least 1.2 times greater, and further in particular at least 1.5 times greater. [21] Air purification device according to any one of claims 14 to 20, characterized by , that the deposition electrode (64) extends from the front of the housing (18) to the rear of the housing (20). [22] Air purifier according to any one of the preceding claims, characterized by , that the air purification device (10) includes a holding and guiding device (84) for the separation electrode (64), wherein in particular the holding and guiding device (84) in the area of ​​the channel inlet (78) and the channel outlet (80) comprises electrode receptacles (86, 88) for receiving the outwardly pointing end edges (90, 92) of the deposition electrode (64), wherein, in particular, the electrode receptacles (86, 88) are formed in the form of grooves (94, 96) extending between the lower part of the housing (14) and the upper part of the housing (16). [23] Air purifier according to any one of the preceding claims, characterized by , that the at least one electrostatic precipitator (60) comprises a capacitive channel section (98) downstream of the emission electrode (62) in the direction of flow (76) with a field electrode (100) limiting the air purification channel (68) in the area of ​​the channel section (98) and opposite the separation electrode (64), particularly a) the same high voltage is applied between the field electrode (100) and the deposition electrode (64) as between the emission electrode (62) and the deposition electrode (64) and / or b) a channel width (102) in the area of ​​the channel section (98) is constant or substantially constant and / or c) the deposition electrode (64) comprises a deflection area (104) which extends from the channel section 98() into the area of ​​the rear of the housing (20) to deflect the airflow (56) in a direction transverse, in particular perpendicular, to the flow direction (76) defined by the channel section (98). [24] Air purifier according to any one of the preceding claims, characterized by , that the air purification device (58) includes a catalyst (108), in particular for the reduction of ozone and / or nitrogen oxides, and / or a filter (110), in particular in the form of an activated carbon filter, for the reduction of ozone and / or for binding nitrogen oxides (NOₓ)x ) includes, where in particular the filter (110) a) is designed in the form of a flat pleated filter and / or b) and / or the catalyst (108) is arranged or formed in the direction of flow between the air purification duct (68) and the suction inlet (114). and / or c) and / or the catalyst (108) close the chamber inlet (34) and / or d) and / or the catalyst (108) is arranged or designed to be withdrawable from the housing (12) through the underside of the housing (14). [25] Air purifier according to any one of the preceding claims, characterized by , that the air purifier (10) includes a control and / or regulating device (140) for controlling and / or regulating the operation of the air purifier (10), particularly a) the air purifier (10) comprises an operating device (142) that interacts with the control and / or regulating device (140), which is in particular arranged or formed on the top of the housing (16) and / or comprises an input device (144) and a display device (146), and / or b) the control and / or regulating device (140) is designed to detect damage, in particular a break, of the emission electrode (62) and / or c) the control and / or regulating device (140) is designed to automatically switch off the air purifier (10) when the separating electrode (64) is removed and / or d) the control and / or regulating device (140) is arranged or designed in the technical chamber (28) and / or e) the control and / or regulating device (140) and / or the high-voltage source (66) are arranged or designed on the technology carrier (36) and / or f) the air purifier (10) includes an interface device (148) that interacts with the control and / or regulating device (140) for connecting the air purifier (10) to external communication devices (150), in particular to a smartphone (152), for control purposes. wherein in particular the interface device (148) is designed in the form of a radio interface device, in particular in the form of a WLAN or Bluetooth interface device, and / or (g) the air purifier (10) comprises at least one sensor device (154) that interacts with the control and / or regulating device (140) for measuring temperature, humidity and / or formaldehyde content in the air to be purified and / or h) the control and / or regulating device (140) is designed to control the delivery rate of the air conveying device (30) depending on a measured air quality. [26] Air purifier according to any one of the preceding claims, characterized by , that a) the air conveying device (30) is designed to convey an air volume of at least 200 m³ 3 per hour, especially from at least about 500 m 3 per hour, and / or b) the air purification device (10) includes a pre-filter (106) and that the pre-filter (106) closes off the at least one air inlet (50). and / or c) the air purification device (10) is designed to be mobile. [27] A method for cleaning air, in which the air to be cleaned is conveyed through an electrostatic precipitator (60) having an electrically conductive emission electrode (62) for emitting and / or generating charged particles and an electrically conductive separation electrode (64) for separating charged dirt particles, wherein a high voltage is applied between the emission electrode (62) and the separation electrode (64), characterized by , that the air to be cleaned is passed through at least one air cleaning channel (68) during cleaning, which is limited by the separation electrode (64), particularly a) a high voltage with a value in the range of about 10 kV to about 20 kV is applied between the emission electrode (62) and the deposition electrode (64). and / or b) the air to be cleaned is guided in the direction of flow (76) through an electric field between the separation electrode (64) and a field electrode (100) opposite it, after passing through the electric field formed by the high voltage between the emission electrode (62) and the separation electrode (64). [28] Use of an air purification device according to any one of claims 1 to 26 for carrying out a method according to claim 27.

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