DE102021203211B3 - Atmospheric dielectric barrier discharge device and manufacturing method therefor - Google Patents

Abstract

The invention relates to a device for atmospheric dielectric barrier discharge, as a result of which the oxygen in the air is converted into hydroxyl radicals. The device comprises a glass tube (1), an inner electrode (4) and an outer electrode (5, 18). The inner electrode (4) is made of bundled stainless steel fibers with a fiber diameter of 1.0 to 1.2 µm, and the outer electrode (5, 18) is designed as a screen cylinder. The screen cylinder is made from a metal wire mesh with longitudinal wires (5a, 18a) and transverse wires (5b, 18b), the wire diameter being between 0.18 and 0.36 mm and the distance between the longitudinal wires (5a, 18a) being between 0.4 and is 1.25 mm.

Description

field of invention

The invention relates to a device for atmospheric dielectric barrier discharge, in which the oxygen in the (ambient) air is converted into hydroxyl radicals. The invention also relates to a method of manufacturing the device for atmospheric dielectric barrier discharge.

State of the art

Plasma physics now finds its application in many fields, with the main focus being on the use of cold atmospheric plasma.

It is generally known that the dielectric discharge form serves to improve indoor air quality and reduce odors. This is used, for example, in EP 1 394 477 B1 described in detail.

However, the dielectric discharge form is also used to generate ozone, as ozone is a strong oxidizing agent for organic and inorganic substances. Ozone is also used for water treatment in various areas of application. Such a device is described, for example, in EP 0 789 666 B1 .

However, smaller discharge tubes are also already known which aim to produce ozone only up to the legal limit of 0.1 ppm. In this regard, reference is made to DE 10 2005 056 726 B4 and DE 101 27 035 A1 that work with these forms of discharge.

If at least one dielectric barrier is provided for shielding the electrodes in the case of the dielectric discharge form, the geometric arrangement of the electrodes remains largely free. Various materials can be considered as the dielectric, with glass and ceramic being predominantly used, which has a selected dielectric. In this regard, ionization tubes are known that work with natural overflow. A natural overflow is achieved when the discharge tube heats up slightly. In such ionization tubes, however, the oxygen in the air is in contact with the discharge at the outer electrode for a relatively long period of time, so that too much ozone is usually generated.

DE 103 16 378 B3 relates to a discharge tube, comprising an insulator tube with an inner surface and an outer surface, an inner electrode made of a flexible sheet material, which is in contact with the inner surface, an outer electrode, which is in contact with the outer surface, a spring element with at least one metal wire, which has at least one Part of the length of the inner electrode is in contact with this and this is applied against the inner surface.

Summary of the Invention

The development of the invention is based on the task of specifying the form of the discharge so far that the atmospheric dielectric barrier discharge (silent electrical discharge) converts the oxygen in the air into hydroxyl radicals, in order not only to reduce odors, bacteria, fungi and spores , but also to destroy viruses.

This object is achieved with a device for atmospheric dielectric barrier discharge having the features of claim 1 and a method for producing a device for atmospheric dielectric barrier discharge having the features of claim 10.

The device for atmospheric dielectric barrier discharge according to the invention comprises a glass tube and an inner electrode which is formed from bundled stainless steel fibers with a fiber diameter of about 1.0 to 1.2 μm, preferably about 1.0 μm. The bundled stainless steel fibers are arranged in a spiral inside the glass tube. The length of the fibers is approx. 3 to 6 cm. When installed, the fibers are mostly overlapped. The device also includes an outer electrode designed as a screen cylinder. The screen cylinder is formed from a metal wire mesh, the wire diameter being between approximately 0.18 and 0.36 mm and the distance between the longitudinal wires being between approximately 0.4 and 1.25 mm.

Through the glass tube as a dielectric in connection with the structured screen cylinder as the outer electrode with a material thickness of 0.18 to 0.36 mm and the distance between the longitudinal wires of 0.4 to 1.25 mm and the inner electrode, which consists of bundled stainless steel threads with a thickness of 1.0 to 1.2 µm, a homogeneous dielectric discharge takes place, with the space A between the outer electrode and the barrier being completely filled by a single discharge and little spatial structuring due to microdischarges being recognizable. This homogeneous form of discharge enables the atmospheric dielectric barrier discharge to convert the oxygen in the air into hydroxyl radicals in such a way that not only odors, bacteria, fungi and spores are reduced, but viruses are also destroyed.

During operation of the device, the discharge tube converts the oxygen in the (ambient) air into hydroxyl radicals. The gas mixture is conductive on the surface of the outer electrode, so that an atmospheric low-pressure plasma is created there. In the plasma state of the air-gas mixture, the conversion of the atmospheric oxygen to hydroxyl radicals takes place. During the plasma discharge, the oxygen molecule is split into two oxygen atoms. Hydroxyl is formed by a hydrogen atom with a bound oxygen atom. The hydroxyl radical (OH radical, HO·) is a molecule made up of one hydrogen and one oxygen atom. As a radical, it has a single unpaired electron generated by the plasma discharge and is therefore very active to combine. The plasma discharge essentially takes place in three steps. First, the molecules in the air are broken down, eg O ₂ into 2*O, N ₂ into 2*N and H ₂ O into 2H and O. In a second step, electrons are separated from the atoms and remaining molecules. This is done by high-energy surges of AC voltage with a frequency of preferably 25 to 44KHz. In a third step, the atoms (positive ions and negative ions) reassemble.

Hydroxyl radicals exhibit a strong denaturing property towards singular cells (bacteria, fungi) and singular cell-like associates (viruses). Mostly unsaturated fatty acids of the fats of the cell membrane are oxidized. This will destroy it. Cell groups of higher cells, e.g. plant cells or animal cells, are not affected in any way, since the composition of the fats of the cell membranes is different.

The highly reactive oxygen radicals react quickly with a large number of organic and inorganic compounds, which means that the polluted air and polluted surfaces are extremely effectively and reliably odor neutralized and disinfected. The oxygen radicals produced are completely consumed by the oxidation process within a certain period of time and decompose back into oxygen.

During operation, the device according to the invention reduces the time required for the natural destruction of enveloped viruses from the usual time interval of 3 to 5 days to approximately 30 minutes or can be operated continuously, resulting in continuous disinfection of the air and surfaces in the near field . The device according to the invention is also of particular interest for destroying certain airborne viruses. These include certain rhinoviruses, influenza viruses and especially corona viruses, such as the “SARS-CoV-2” corona virus. For the results presented, reference is made to a test report by Dr. Schmelz GmbH, competence center for technical hygiene and applied microbiology.

The plasma discharge occurs on the longitudinal wires of the outer electrode in the area of an air cushion A, where the longitudinal wire of the outer electrode with the glass barrier is ignited, and on the wire ends of the outer electrode. In particular, the air cushion A is formed between the lower edge of the longitudinal wire and the glass barrier. So that the discharges also take place reliably at the wire ends of the outer electrode, the inner electrode preferably extends at least over the entire length of the outer electrode, i.e. up to the wire ends of the outer electrode. The inner electrode particularly preferably extends beyond the wire ends of the outer electrode. This makes it possible to extend the plasma generation beyond the wire ends of the outer electrode, which increases the amount of plasma.

According to a preferred embodiment, the screen cylinder of the outer electrode is finely structured, i.e. it is formed from a metal wire mesh, the wire diameter being between approx. 0.18 and 0.24 mm, more preferably approx. 0.22 mm, and the distance between the longitudinal wires being between approx 0.3 and 0.5 mm, more preferably about 0.4 mm. The height of the screen cylinder can be between approx. 6 and 8 mm, whereby the length of the screen cylinder can be adjusted to the circumference of the glass tube.

According to a further preferred embodiment, the screen cylinder of the outer electrode is coarsely structured, i.e. it is formed from a metal wire mesh, the wire diameter being between approximately 0.23 and 0.36 mm, more preferably approximately 0.35 mm, and the spacing of the longitudinal wires between is about 0.8 and 1.25 mm, more preferably about 1.2 mm. The height of the screen cylinder can be between approx. 7 and 10 mm, whereby the length of the screen cylinder can be adjusted to the circumference of the glass tube.

Under this condition of the design of the discharge tube, a homogeneous dielectric discharge takes place both in the case of the finely structured and the coarsely structured discharge tube, with the space A between the outer electrode and the barrier being completely filled by a single discharge and few spatial structurings due to microdischarges being recognizable.

The glass tube is preferably made of soda-lime glass. The use of lime nat Ron glass, whose dielectric constant is between about ε 6.8 and 7.4, preferably ε 7.2, contributes to a precise discharge. The temperature on the surface of the discharge tube during use is about 30 to 58°C. Soda-lime glass steadily increases in viscosity with decreasing temperature, allowing a wall thickness tolerance of ±0.03mm to be produced. Another advantage of soda-lime glass is that this type of glass is widely available and inexpensive to produce.

The glass tube is preferably cylindrical, with the base of the cylinder being closed and the top surface of the cylinder being open. Such a cylindrical shape can be manufactured easily and inexpensively. The closed base of the cylinder is preferably designed as a flat base. At the open

top surface, the edge may be weakly fused. The glass tube preferably has a height of 20 mm ± 0.04 mm, an outside diameter of 11.25 mm ± 0.12 mm and a wall thickness of 0.7 mm ± 0.03 mm.

A disc for marking the area of use is preferably provided within the glass tube, adjacent to the closed base area. In other words, a disk for marking the respective area of use can be incorporated in the head of the glass tube, so that the corresponding area of use can be recognized at a glance. It is particularly advantageous here to design the pane in colour, i.e. to use different colors for different areas of application. The disk may be secured to the base or flat bottom of the cylinder in any manner known in the art. However, it is particularly advantageous if the disk is placed in the head of the glass tube before the inner electrode is incorporated. In this case, no additional fastening of the disk is required, but it is held by the inner electrode.

Preferably, the device further includes a HV cable. This allows the electronics that generate high frequency AC voltage for the operation of the device to be placed at a distance from the discharge tube. HV cables with a shielding of 2 to 15 kV are preferably used for the connection. With a rest potential of preferably 1750 V AC, it is largely ensured that hydroxyl radicals are formed almost exclusively. The formation of nitrogen oxides (NOx) is not possible at an electrode voltage of 1750 V AC due to the chemical stability of the nitrogen gas molecule due to a triple bond and hybridization of the atoms involved. Ozone formation also does not occur at this voltage. In addition, a frequency of 15 to 22 KHz would ideally be used for the formation of O ₃ . However, it is also conceivable to increase the electrode voltage, for example up to 3500 V, so that between 1750 V and 3500 V ozone formation begins steplessly. In this case, the device would be suitable for optionally forming ozone in addition to hydroxyl radicals, for forced disinfection or for removing unwanted odors. However, hydroxyl radicals are considered to be effective in reducing singular cells or singular cell-like associates.

Preferably, a sealing disk with an opening is provided inside the glass tube, on the side of the open top surface. The sealing disc can be provided to seal the bundled or compressed stainless steel filaments of the inner electrode. The opening or bore of the sealing disk can be provided in the center of the sealing disk. Preferably, through this opening in the

A conductor of the HV cable is inserted into the interior of the glass tube through the sealing disc and electrically connected to the inner electrode.

A free space within the glass tube between the sealing disk and the open top surface of the glass tube is preferably filled with casting compound. This seals the interior of the glass tube airtight against dirt and moisture.

The device preferably also includes a grounding cable which is electrically conductively connected to the outer electrode. The grounding cable is particularly preferably made of tinned individual strands and is spot-welded to the outer electrode with a ferrule in order to produce a reliable electrically conductive connection between the outer electrode and the grounding cable. The ferrule can be closed on one side to reliably prevent patina from forming on the individual strands of the grounding cable.

The grounding cable and the HV cable are preferably arranged essentially parallel to one another by at least one spacer. Due to the parallel arrangement, both cables can be led out of the device on the same side, as a result of which a compact configuration of the device is made possible. Furthermore, a required minimum distance between the cables can be maintained by the at least one spacer, since the so-called proximity effect can occur if the cables are too close to one another.

The device preferably also comprises a blower device which is arranged for the axial overflow of the glass tube. The blower device is particularly preferably a fan. The air flow generated by the blower device preferably flows over the glass tube axially. Due to the forced overflow of the axial circumference of the glass tube, an extremely precise discharge can take place compared to a natural overflow without the use of an additional blowing device. The axial overflow particularly preferably takes place over almost the entire circumference, as a result of which the precision of the discharge can be further increased.

In the third step of converting the oxygen in the (ambient) air into hydroxyl radicals, ie the reassembly of the atoms (positive ions and negative ions), the flow, which moves in the nanosecond range over time, and the preferred frequency of 25 to 44 KHz, hardly any NOx is formed in the discharge tube according to the invention, but more O is formed. A frequency of 15 to 22 kHz can preferably be used for the optional formation of O ₃ , with the residence time here being up to one second.

Another advantage of this geometric arrangement of the fan device in relation to the glass tube is that the oxygen in the air has only a short dwell time with the outer electrode due to the uniform flow over the circumference of the cylindrical discharge tube, thereby reducing ozone development. For example, with each peak in the sine wave of the high-frequency AC voltage of 1750V AC, 25,000 amplitudes per second, and an ignition (in area A) with a current of approx. 200mA, which takes place between the lower edge of the longitudinal wire and the glass barrier, approx. 290,000 negative ions /cm ³ generated.

The method for manufacturing an atmospheric dielectric barrier discharge device according to the present invention comprises providing a glass tube, providing an inner electrode formed of bundled stainless steel fibers having a fiber diameter of 1.0 to 1.2 µm on an inner periphery of the glass tube, and providing a designed as a screen cylinder outer electrode on an outer circumference of the glass tube. The screen cylinder is formed from a metal wire mesh, the wire diameter being between 0.18 and 0.36 mm and the distance between the longitudinal wires being between 0.4 and 1.25 mm. The stainless steel fibers of the inner electrode are pressed on with approx. 20-27 N/75 mm ² , more preferably approx. 20-27 N/76 mm ² , particularly preferably approx. 24 N/76 mm ² , in particular approx. 24 N/76.2 mm ² .

By providing a structured screen cylinder as the outer electrode with a material thickness of approx. 0.18 to 0.36 mm and a distance between the longitudinal wires of approx. 0.4 to 1.25 mm, and an inner electrode made of bundled stainless steel threads with a thickness of approx. 1.0 to 1.2 µm and is pressed with approx. 20-27 N/ 75mm ² , the desired homogeneous discharge form is achieved. The bundled stainless steel threads, which are arranged spirally inside the glass tube and are pressed with a stamp, are very well suited to being pressed evenly over the entire inner circumference of the glass tube in the geometrically round shape of the glass tube.

character list

• 1 eine Teilschnittansicht einer Ausführungsform einer Vorrichtung für die atmosphärische dielektrische Barriereentladung mit einer feinstrukturierten Außenelektrode ist;
• 2 eine Teilschnittansicht einer Ausführungsform einer Vorrichtung für die atmosphärische dielektrische Barriereentladung mit einer grobstrukturierten Außenelektrode ist;
• 3 eine schematische Darstellung ist, welche einen Bereich A zeigt, an welchem die Zündung eines Längsdrahtes der Außenelektrode mit einer Glasbarriere stattfindet; und
• 4 eine schematische Darstellung einer Entladung B bei einer Ausführungsform mit der feinstrukturierten Außenelektrode ist.

The invention is explained in detail below with reference to the figures, in which

• 1 Figure 12 is a partial sectional view of one embodiment of an atmospheric dielectric barrier discharge device having a finely structured outer electrode;
• 2 Figure 12 is a partial sectional view of one embodiment of an atmospheric dielectric barrier discharge device having a coarsely structured outer electrode;
• 3 Fig. 12 is a schematic representation showing an area A at which ignition of a line wire of the outer electrode with a glass barrier takes place; and
• 4 12 is a schematic representation of a discharge B in an embodiment with the finely structured outer electrode.

Description of the Preferred Embodiments

In 1 a round, cylindrical discharge tube is shown. The discharge tube comprises a glass tube 1 formed of soda-lime glass. The glass tube 1 is designed as a cylinder with a base 2, which is designed as a flat bottom, and a top surface 3, which is designed as an open side. An outer diameter of the glass tube is preferably about 11.25 mm. A wall thickness of the glass tube is approximately 0.7 mm, with a tolerance of the glass tube wall thickness being approximately 0.03 mm. A dielectric constant ε of the soda-lime glass of the glass tube is 7.2.

An inner electrode 4 is formed from bundled stainless steel filaments with a filament thickness of 1 μm. The thread length is about 3 to 6cm. The stainless steel threads are compressed in the glass tube 1 with, for example, 24 N / 76.2 mm ² .

the inside 1 shown finely structured screen cylinder as the outer electrode 5 is made of metal wire Webe formed and has a wire thickness of preferably 0.18 to 0.24 mm. The metal wire mesh includes longitudinal wires 5a and transverse wires 5b. A free space (air cushion A, see 3 ) between the lower edge of the longitudinal wire 5a of the outer electrode 5 and the glass barrier 1 is approx. 0.2 mm. The screen cylinder has an overall height of 8 mm, with the length of the screen cylinder being adjustable to the circumference of the glass tube 1 .

In 2 a roughly structured screen cylinder is shown as the outer electrode 18 . Similar or the same elements as in 1 are denoted by the same reference numerals. The roughly structured screen cylinder is made of metal wire mesh and has a thickness of preferably 0.23 mm to 0.36 mm. The metal wire mesh includes longitudinal wires 18a and transverse wires 18b. A free space (air cushion A, see 3 ) between the lower edge of the longitudinal wire 18a of the outer electrode 18 and the glass barrier 1 is approximately 0.7 mm. The screen cylinder has an overall height of 9 mm, with the length of the screen cylinder being adjustable to the circumference of the glass tube 1 .

The discharge tube has a wide range of applications, e.g. open and closed drying cabinets, sterilization boxes, air conditioning ducts, tabletop devices, waiting rooms, public transport. Depending on the area of application, different screen cylinders 5, 18 are taken into account; the coarsely structured screen cylinder 18 is predominantly used where higher humidity is to be expected. Therefore, the glass tube 1 preferably has a colored marking 6 inside the glass head, i.e. the area adjacent to the base 2, which can be varied according to customer requirements. To make it easier to identify the area of application, an associated printed circuit board can also be given an identical color code. However, in addition to colored marking, other types of marking are also being considered, such as markings with symbols, numbers, letters or words, etc.

The identification of the corresponding field of application is designed as a disc 6 with a diameter of preferably about 9.5 mm and a thickness of 0.8 to 1.5 mm. The material is preferably EPDM or silicone. The identification disc 6 is placed in the head of the glass tube 1 before the inner electrode 4 is incorporated. As a result, no attachment of the identification disc 6 is required.

In the 1 and 2 The device shown for the atmospheric dielectric barrier discharge also includes a fan 7, which flows over the glass tube 1, preferably axially 8, so that the air can come into contact with the glass tube 1 or discharge tube on all sides.

After the bundled high-grade steel threads of the inner electrode 4 have been pressed together, a sealing disc 9 preferably seals these high-grade steel threads against external influences such as humidity and contamination. The sealing disc 9 is made of silicone and has an opening or bore 10 with a diameter of 1 mm in the middle. A conductor 17 of an HV cable 12 is inserted through this opening 10 into the interior of the glass tube 1 so that the high-frequency AC voltage is in contact with the inner electrode 4 . The operation of inserting the conductor 17 of the HV cable 12 is carried out using a punch with which the inner electrode 4 is inserted. The interior of the stamp has an opening or bore through which the HV cable 12 is passed, the stripped tinned conductor 17 is inserted into the opening 10 of the sealing disc 9 and then the bundled stainless steel threads of the inner electrode 4 are pressed together. A space between the sealing disk 9 and the open side of the glass tube 1, i.e. the open top surface 3, is sealed airtight with a sealing compound 11 against dirt and moisture.

A grounding contact is made via a grounding cable 13 made of silicone, with tinned individual strands 15, the cable cross-section being 0.75 mm ² .

A connection from the grounding cable 13 to the outer electrode 5, 18 is made with a ferrule 14, which is made of a nickel-copper alloy. The nickel-copper alloy has good conductivity and largely prevents patina from forming on the individual strands 15 of the grounding cable 13 . The ferrule 14 has a length of 8 mm, and the grounding cable 13 with the tinned individual strands 15 is stripped 3 to 5 mm. The stripped individual strands 15 are pressed together with the ferrule 14 and then spot-welded to the outer electrode 5.18.

The ferrule 14 is firmly closed in the upper part so that no patina forms on the tinned individual strands 15 as a result of micro-oxidation.

Since the invention can be used for a wide range of applications in which different distances from the discharge tube to the electronics that generate the high-frequency AC voltage must also be bridged, the cables 12, 13 are of particular importance.

The grounding cable 13 and the HV cable 12 are silicone cables that can be laid flexibly.

When laying, care must be taken to ensure that these cables 12, 13 do not run closely parallel. The minimum distance between the cables 12, 13 is 15 to 20 mm, the total length of the cables 12, 13 is between about 5 to 21 cm. The length varies with the area of application, eg larger stand-alone devices, in which two discharge tubes can also be installed, require a longer cable length, or a sterilization box with a plasma tube, which requires a shorter cable length.

If a high-frequency AC voltage flows in closely parallel conductors, the so-called proximity effect occurs. The current flowing through a conductor generates a magnetic field around itself, which penetrates the parallel conductor and generates induction eddy currents there. As a result, losses and also the impedance increase. Impedance also leads to a not inconsiderable reduction in frequency, since impedance is crucial for the resonant circuit. In order to avoid the proximity effect, work is therefore carried out with spacers 16, through which a predetermined minimum distance between the cables 12, 13 can be maintained.

In 3 Fig. 12 is a schematic diagram showing the area A (air cushion) at which ignition of the longitudinal wire 5a, 5b; 18a, 18b of the outer electrode 5, 18 with the glass barrier 1 takes place. In particular, the discharges take place on the longitudinal wires 5a, 18a in the area of the air cushion A between the lower edge of the longitudinal wire 5a, 18a and the glass barrier 1 and on the wire ends of the outer electrode 5, 18.

In 4 a discharge B is shown in an embodiment with the finely structured outer electrode 5 . As shown, in this embodiment the inner electrode 4 has a greater length than the outer electrode 5 , ie the inner electrode 4 extends beyond the edges or wire ends of the finely structured outer electrode 5 . The plasma formation B is thus drawn further out beyond the end of the wire of the outer electrode 5 . Due to the influence of the dielectric on the discharge properties, an increased edge layer discharge occurs at the wire ends. Due to the memory effect, the course of the discharge has a decisive influence on the ignition behavior of the dielectric barrier discharge. The charge carriers generated in the plasma cannot flow off properly because of the barriers and are deposited on their surface. Since the inner electrode 4 extends beyond the edges of the finely structured outer electrode 5, the plasma generation is pulled even further beyond the wire end of the outer electrode 5, and the amount of plasma is thus increased.

Reference List

1

glass tube (dielectric)

2

footprint (flat bottom)

3

Top surface (open side of the glass tube)

4

inner electrode

5

outer electrode (finely structured)

5a

Line wire of the outer electrode

5b

Outer electrode cross wire

6

Disk for marking the area of application

7

blower device (fan)

8th

axial overflow

9

sealing washer

10

Opening in sealing disc

11

potting compound

12

HV cable

13

Ground wire GND

14

ferrule

15

Tinned ground wires

16

spacers

17

Conductor HV cable

18

Outer electrode (roughly structured)

18a

Line wire of the outer electrode

18b

Outer electrode cross wire

A

air cushion

B

discharge

Claims (10)

Atmospheric dielectric barrier discharge apparatus comprising: - a glass tube (1), - an inner electrode (4) provided on an inner periphery of the glass tube (1), the inner electrode (4) being formed of bundled stainless steel fibers having a fiber diameter of 1.0 to 1.2 µm spirally wound inside the glass tube ( 1) arranged and pressed together, and - an outer electrode (5, 18) designed as a screen cylinder, which is provided on an outer circumference of the glass tube (1), the screen cylinder being made of a metal wire mesh with longitudinal wires (5a, 18a) and transverse wires (5b, 18b), the wire diameter is between 0.18 and 0.36 mm and the distance between the longitudinal wires (5a, 18a) is between 0.4 and 1.25 mm. device after claim 1 , wherein the glass tube (1) is made of soda-lime glass. device after claim 1 or 2 , wherein the glass tube (1) is cylindrical, wherein the base (2) of the cylinder is closed, preferably as a flat bottom, and the top surface (3) of the cylinder is open. device after claim 3 , wherein inside the glass tube (1), adjacent to the closed base (2), a disc (6) is provided for marking the area of use. device after claim 3 or 4 , further comprising an HV cable (12), wherein inside the glass tube (1), on the side of the open top surface (3), a sealing disc (9) with an opening (10) is provided, and a conductor of the HV cable (17) is inserted through the opening (10) in the sealing disk (9) into the interior of the glass tube (1) and is electrically conductively connected to the inner electrode (4). device after claim 5 , wherein a free space within the glass tube (1) between the sealing disc (9) and the open top surface (3) is sealed with sealing compound (11). Apparatus according to any one of the preceding claims, further comprising a grounding cable (13) which is connected to the outer electrode (5, 18) in an electrically conductive manner, with the grounding cable (13) preferably being formed from tinned individual strands (15) and having a ferrule (14) connected to the outer electrode (5, 18) is spot welded. device after claim 7 , when dependent on claim 5 or 6 , wherein the grounding cable (13) and the HV cable (12) are arranged parallel to one another by at least one spacer (16). Device according to one of Claims 1 until 8th , Furthermore, with a blower device (7), wherein the blower device (7) is arranged for axial overflow of the glass tube (1). Method of manufacturing a device for atmospheric dielectric barrier discharge according to claim 1 , comprising the steps of: - providing a glass tube (1), - providing an inner electrode (4) formed of bundled stainless steel fibers having a fiber diameter of 1.0 to 1.2 µm on an inner periphery of the glass tube (1), and - Providing an outer electrode (5, 18) designed as a screen cylinder on an outer circumference of the glass tube (1), the screen cylinder being made from a metal wire mesh with longitudinal wires (5a, 18a) and transverse wires (5b, 18b), the wire diameter being between 0, is 18 and 0.36 mm and the spacing of the longitudinal wires (5a, 18a) is between 0.4 and 1.25 mm, and the stainless steel fibers are arranged spirally inside the glass tube (1) and the inner electrode (4) by pressing of the spirally arranged stainless steel fibers with 20-27 N / 75mm ² is formed.

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