EP4062715A1 - Dispositif à plasma - Google Patents

Dispositif à plasma

Info

Publication number
EP4062715A1
EP4062715A1 EP20800960.5A EP20800960A EP4062715A1 EP 4062715 A1 EP4062715 A1 EP 4062715A1 EP 20800960 A EP20800960 A EP 20800960A EP 4062715 A1 EP4062715 A1 EP 4062715A1
Authority
EP
European Patent Office
Prior art keywords
plasma
plasma source
treated
distance
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20800960.5A
Other languages
German (de)
English (en)
Inventor
Maximilian CANTZLER
Piotr Cyran
Florian Michl
Tobias Wende
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Terraplasma GmbH
Original Assignee
BSH Hausgeraete GmbH
Terraplasma GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH, Terraplasma GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP4062715A1 publication Critical patent/EP4062715A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
    • D06M10/025—Corona discharge or low temperature plasma
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
    • H05H1/2439—Surface discharges, e.g. air flow control
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H2245/00—Applications of plasma devices
    • H05H2245/30—Medical applications
    • H05H2245/36—Sterilisation of objects, liquids, volumes or surfaces
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H2245/00—Applications of plasma devices
    • H05H2245/40—Surface treatments
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H2245/00—Applications of plasma devices
    • H05H2245/60—Portable devices

Definitions

  • the present invention relates to a plasma device, in particular for applying cold atmospheric plasma to a surface to be treated, in particular textiles, leather and / or fibers.
  • plasmas can be used for disinfection, especially of surfaces contaminated with bacteria.
  • Typical applications of such plasma devices are in the areas of disinfection or sterilization, surface functionalization and in the medical field, such as wound disinfection, wound treatment, healing and treatment of skin irritations and the treatment of bacterial, viral and fungal skin diseases.
  • the known plasma devices are no longer limited to use on surfaces. These can also be used to disinfect air.
  • Bacteria are often responsible for the formation of unpleasant smells on surfaces or in volumes of air, the metabolism of existing nutrients and the formation of substances with an unpleasant smell. Killing or deactivating these bacteria can at least temporarily prevent the formation of additional substances with unpleasant odors or other disruptive molecules, i.e. molecules that are not odor-relevant, but cause discomfort, a feeling of sickness, illness, weakness or similar conditions such as allergens, protein molecules or prions .
  • additional substances with unpleasant odors or other disruptive molecules, i.e. molecules that are not odor-relevant, but cause discomfort, a feeling of sickness, illness, weakness or similar conditions such as allergens, protein molecules or prions .
  • the substances that are already present are not eliminated, so that their odor can usually only be masked by additional volatile substances such as fragrances. It is therefore desirable to deactivate the odorous substances.
  • Another area of application is the freshening of textiles and / or clothing instead of or in addition to washing.
  • ozone can be used for this purpose, but due to its toxicity it has to be filtered out of the air again after chemical oxidation of malodorous molecules.
  • the reaction is slow and requires long interaction times, since ozone molecules move thermally at only about 200 meters per second. It is also possible to remove malodorous molecules by washing the textiles and / or clothes. This is a standard process, partly mechanical, partly chemical. It usually works well, but it takes time, is expensive, has high CO 2 emissions and is an effort that requires access to a washing machine, which is not always possible (e.g. when traveling). Another problem with this is that not all textiles or items of clothing can be washed because they are damaged or even destroyed during the washing process.
  • washing below 40 ° C does not remove any sources of odors (e.g. bacteria) and can even promote their growth.
  • the unpleasant smell can also be eliminated by dry cleaning.
  • chemical cleaning agents can damage some textiles and / or clothing.
  • cold atmospheric plasma devices can also be used to remove unpleasant odors.
  • plasma devices can only be operated efficiently at relatively high voltage amplitudes, and for reasons of electrical safety there are restrictions on operating such devices in the vicinity of a person's skin.
  • conventional devices are comparatively large and stiff.
  • plasma devices can create a variety of chemical compounds. These can, for example, electrons, ions, reactive compounds, in particular special reactive oxygen such as O 3 and nitrogen species such as NO, NO 2 , etc., neutral systems and UV light, some of which can cause harm to people if certain thresholds are exceeded.
  • the local temperature increase at the interface between a plasma device and a surface to be treated can also damage the material to be treated.
  • the present invention is therefore concerned with the problem of specifying an improved or at least an alternative embodiment for a plasma device which in particular overcomes the disadvantages known from the prior art.
  • the present invention is based on the general idea of equipping a plasma device for applying a cold atmospheric plasma to a surface to be treated, especially textiles, leather and / or plastic fibers, with a technically simple and reliable actuator that activates a plasma source exclusively allowed under predetermined conditions.
  • the plasma device has a housing and a plasma source arranged therein and a voltage source for applying a voltage to the plasma source, as well as the actuator, which is designed to activate the plasma source, provided there is a distance between the plasma source and the surface to be treated within a predetermined distance, the actuator having an adjustable and pre-tensioned actuator element with at least one actuating element and a detection device that detects the position of the actuator element at least if the distance between the plasma source and the surface to be treated is within the predetermined distance.
  • the plasma device is thus configured to enable the plasma source to be activated (eg activation by a user, eg via an input from the user) only when a distance between the plasma source and the surface to be treated is within the specified distance.
  • the plasma can only be ignited when the plasma device is in the vicinity of the surface to be treated or comes into contact with it.
  • the plasma device according to the invention in particular dangers due to incorrect operation by the customer can be avoided, since the plasma source is finally activated when the distance to the clothing to be cleaned is within the predetermined distance.
  • Another advantage of the invention is the very compact and inexpensive construction. This is also considered to be helpful in avoiding emissions if the plasma device is not used as intended.
  • the actuator should also be understood to mean any design that is suitable for enabling the plasma source to be activated only when a distance between the plasma source and the surface to be treated is within the specified distance.
  • a distance sensor or a light barrier can be subsumed under the detection device. The detection device detects the distance and can activate the plasma source directly or indirectly when a distance between the plasma source and the surface to be treated lies within the predetermined distance.
  • a spring, an elastic plastic element such as a Dichtungslip, a foam element or a rubber element, or a pneumatic or hydraulic reset device is provided for biasing and resetting the actuator element.
  • the detection device expediently has a proximity sensor, a contact sensor, a microswitch, a strain gauge, a magnetic sensor and / or a light barrier.
  • the actuator element is provided in the device direction with one or more actuating elements in order to make the safe contact of the plasma device with the surface to be treated recognizable to electronics, here the detection device.
  • These actuating elements can then be queried with any proximity or contact sensors, for example actuating microswitches or addressing other sensors provided with metal parts / magnets. Also expansion Voltage measuring strips connected to a deformable material are conceivable. As a result, the detection device can be manufactured inexpensively and extremely flexibly.
  • the detection device has a light barrier and the actuating element has a beveled edge, where the detection device is designed such that it determines a degree of coverage of the light barrier and thus a distance between the plasma source and the surface to be treated.
  • the detection device expediently has a light barrier and is arranged on a circuit board having an opening, the opening being crossed or covered by the light barrier and into which the actuating element engages, provided that the distance between the plasma source and the surface to be treated is within the predetermined range Distance lies.
  • the actuating element of the actuator element thus engages through the opening, whereby a very space-saving design can be achieved.
  • the predetermined distance is preferably in a range from 0 to 4 mm, preferably 0 to 1 mm. This has the particular advantage that, depending on the predefined parameters (e.g. distance), the plasma source or an individual plasma source segment can be activated and / or deactivated. It is assumed that this enables a further reduction in emissions and an increase in the overall efficiency of the plasma device.
  • the plasma device can preferably include an indicator or control light which is configured to instruct a user to ventilate an area around the plasma device after the plasma source has been switched on for a predetermined period of time.
  • a speed sensor is provided for measuring a speed at which the plasma device is moved over the surface to be treated, the plasma device preferably being configured in such a way that it automatically switches off the plasma source when the detected speed falls below a first predetermined value or above a secondelle certain value. This ensures that the plasma device operates in a reasonable speed range, i.e. not too slow (in order to keep the temperature at the contact point between the plasma device and the surface to be treated below the operating threshold, i.e. below the temperature that will damage the material to be treated can hold) and not too quickly (to fulfill the purpose of the treatment, e.g. to enable the malodorous molecules to be deactivated).
  • a surface property detection device in particular a temperature sensor or a moisture sensor, is expediently provided for detecting at least one property of the surface to be treated.
  • the at least one property can be a moisture content or a temperature, for example.
  • the surface property detection device preferably includes a moisture sensor for detecting the moisture level of the surface to be treated, wherein the plasma device is preferably designed so that the plasma source is automatically switched off when the moisture content of the surface to be treated is higher than a predetermined moisture level , thereby preventing the plasma device from being operated with excessive power.
  • the moisture content of the surface to be treated can be determined by measuring the power taken up by the plasma source.
  • the power consumed by the plasma source is preferably recorded at a frequency of at least 10 s-1, preferably 50 s-1 and preferably 100 s-1.
  • This measurement can be carried out, for example, in the control circuit of the plasma device.
  • the plasma source and the control circuit can thus form the humidity sensor.
  • a separate sensor can also be used.
  • the surface property detection device contains a temperature sensor for detecting the temperature of the surface to be treated, the plasma device being configured to automatically switch off the plasma source when the temperature of the surface to be treated is reached Surface is above a predetermined temperature value, whereby damage to the treated material is prevented.
  • the plasma device is expediently portable and the voltage source has a battery or an accumulator. This enables comparatively simple mobile use.
  • the plasma source can be exchangeable.
  • the plasma device can be constructed so that the plasma source is housed in a plasma source unit of the plasma device and the voltage source is housed in a main housing of the plasma device and the plasma source unit is detachably coupled to the main housing.
  • a plasma device can include, for example, the main housing and a number of plasma source units, each of which is particularly suitable for a particular material to be treated.
  • cold atmospheric plasma refers to plasmas that operate under normal atmospheric conditions (e.g. temperature and pressure) and, for example, enable painless in vivo applications without tissue damage.
  • Cold atmospheric plasmas can be generated in the plasma, for example, by limiting a number of high-energy electrons and / or by cooling uncharged molecules / atoms.
  • An important characteristic of cold atmospheric plasma is that it continues to have bactericidal and fungicidal properties.
  • the plasma source can be formed in any form capable of generating the cold atmospheric plasma and applying it to a surface to be treated.
  • An SMD device Surface Micro Discharge
  • Further optional structural features are explained below.
  • the plasma device is preferably also configured in such a way to enable the plasma source to be activated again (e.g. activation by a user, e.g. via an input from the user) after the plasma source has been switched off for a predetermined waiting time, whereby the concentration of the toxic substances is significantly below the threshold falls.
  • the plasma device preferably contains a control circuit which is configured to set the plasma as a function of the detected surface condition, in particular as a function of the detected humidity and / or temperature, in such a way that the refreshment treatment is carried out without damaging the treated material.
  • the plasma source includes a first electrode, a second electrode, and a dielectric layer separating the first electrode and the second electrode, the first electrode configured to ignite the cold atmospheric plasma to treat the surface to be treated. That is, the first electrode is arranged so that it is closer to the surface to be treated than the second electrode. The first electrode is preferably configured to contact the surface to be treated. The first electrode can furthermore be covered with a dielectric material. The first electrode or the dielectric material covering the first electrode is preferably exposed to the surrounding atmosphere through an opening in the housing, while the second electrode is arranged within the housing. It is pointed out that such an electrode structure also represents an independent aspect of the present invention and can be provided independently of the above-mentioned first aspect. But it can also be combined with any of the sensors mentioned above.
  • the first electrode is grounded and / or the plasma device furthermore contains an on / off switch which is electrically connected to the first electrode, the plasma device being configured to only to enable activation of the plasma source and / or to selectively switch on the plasma source only when the on / off switch is pressed. Accordingly, when using the plasma device, there is no potential difference between the user and the first electrode, and thus no discharge from the first electrode, i.e. the electrode at which the plasma is ignited, to the user.
  • a conductive connection between the first electrode and the skin of the user can be established, for example by a conductive switch and / or by another conductive part of the housing of the device.
  • the device is preferably designed so that the conductive switch and / or the conductive housing section must be held and / or pressed by the user in order for the plasma device to function (e.g. continuously held and / or pressed during operation of the plasma device).
  • the control circuit of the device can deactivate activation of the plasma source.
  • the switch can be the on / off switch of the device. However, an additional safety switch can also be used, which must be pressed in addition to the on / off switch.
  • This switch e.g. the on / off switch
  • the plasma device may further include a temperature sensor configured to detect a temperature of the first electrode.
  • the plasma device is preferably configured to selectively switch off the plasma source automatically when the temperature of the first electrode is higher than a predetermined temperature value. This reduces the risk of damage to the treated material and / or tissue from an overheated electrode.
  • the plasma device preferably contains segmented plasma sources, whereby each segment can be provided with one of the aforementioned security architectures, e.g. the distance sensor, the light sensor, the speed sensor, the display or the control lamp, the surface properties detection device, etc. .
  • the plasma source preferably includes at least a first plasma source segment and at least a second plasma source segment, the plasma device being configured to selectively switch on the first plasma source segment only when a distance between the first plasma source segment and the surface to be treated lies within the predetermined distance, and around the second plasma source segment to be switched on selectively only if a distance between the second Plas mattlensegment and the surface to be treated is within the predetermined distance.
  • the predetermined distance is preferably in a range of 0 to 4 mm, and preferably 0 to 1 mm. This has the particular advantage that a single plasma source segment can be activated and / or deactivated depending on the previously defined parameter (eg distance).
  • At least one of the first electrode or the second electrode preferably includes a first electrode segment in a region of the first plasma source segment and a second electrode segment in a region of the second plasma source segment. That is, at least one of the electrodes can be a segmented electrode.
  • the other electrode is preferably a common electrode that is assigned to the first and second electrode segments. However, a segmented second electrode can also be used.
  • the first plasma source segment and the second plasma source segment are preferably connected electrically in parallel.
  • Fig. 1 shows a schematic representation of a plasma device according to a ferred embodiment of the present invention
  • Fig. 2 shows a schematic representation of a plasma device according to a ferred embodiment of the present invention
  • FIG. 3A shows various wet / damp textiles that showed no damage during the cold atmospheric plasma treatment, with dry fabrics also being shown after the same treatment for comparison
  • FIG. 3B shows various wet / damp textiles which showed certain damage in the cold atmospheric plasma treatment, with dry fabrics also being shown for comparison after the same treatment
  • 4A and 4B respectively show the plasma power consumed by a plasma source of a plasma device according to the present invention when the plasma device has been swept over sample fabric with the conditions described in detail below;
  • FIG. 5 is a schematic cross-sectional view showing the structure of a plasma source of a plasma device according to a preferred embodiment of the present invention.
  • FIGS. 6A and 6B each show schematic plan views of two examples of a plasma source with two plasma source segments
  • FIGS. 7A and 7B show exemplary circuit diagrams of the plasma sources shown in FIGS. 6A and 6B.
  • Fig. 8 shows a schematic diagram of a plasma device according to a preferred embodiment of the present invention, which includes a replaceable plasma source unit,
  • FIG 9 shows a sectional illustration through a plasma device according to the invention in the area of an actuator.
  • a plasma device 100 for applying a cold atmospheric plasma to a surface to be treated includes a housing 102, a plasma source 104 in housing 102 and a voltage source (not shown) in Housing 102 for applying a voltage to the plasma source 104.
  • the plasma source 104 can be held by a plasma source holder 106 which forms a front part of the housing 102, as shown in FIG.
  • the plasma device 100 is configured to enable activation of the plasma source 104 only when a Distance between the plasma source 104 and the surface to be treated is within a predetermined distance.
  • the selective switch-on can be implemented, for example, by a distance sensor 110, as shown in FIG. 1, or by an actuator 900 according to FIG. 9.
  • the actuator embodied as a distance sensor 110 is a mechanical distance sensor with a voltage source connection 114, which is electrically connected to the voltage source, and a plasma source connection 112, which is electrically connected to the plasma source 104.
  • the voltage source terminal 114 and the plasma source terminal 112 are configured such that they are spaced apart from one another when the plasma device 100 does not come into contact with the surface to be treated. In the meantime, the voltage source terminal 114 and the plasma source terminal 112 are configured to be movable with respect to each other.
  • the housing 102 (the plasma source holder 106) and / or the plasma source 104 is pressed against the surface to be treated by the plasma source connection 112 being pushed inwards towards the voltage source connection 114 and finally the voltage source connection 114 is electrically coupled to the plasma source connection 112, as a result of which the voltage source can apply a voltage, ie can selectively switch on the plasma source 104.
  • the connections 112, 114 do not necessarily have to be connected to the plasma source or the voltage source. For example, they can also be coupled to a controller (not shown) that indicates whether there is a connection.
  • a plasma device 200 in accordance with another preferred embodiment of the present invention includes a housing 202, a plasma source 204, a plasma source holder 206, and a voltage source (see below) corresponding to the corresponding elements in FIG. 1 Ausense approximate form are similar.
  • the plasma device 200 contains a light sensor 210, in particular as an actuator or as a detection device. When the plasma device 200 is brought into the vicinity of an object to be treated, the light is gradually blocked by this object and that by the light sensor 210 the amount of light received is reduced.
  • the plasma device 200 is configured guriert in order to selectively switch on the plasma source 204 if the amount of light received by the light sensor 210 is below a predetermined value, or to enable it to be switched on only in this case (for example by the user).
  • the given value can be determined by the amount of light received by the light sensor 210 if the plasma device 200 is held at a given distance (for example 4 mm, 3 mm, 2 mm or 1 mm) from the surface to be treated.
  • the position of the light sensor 210 is not particularly limited. While the light sensor 210 in FIG. 2 is arranged at both ends of the plasma source 204, additional or alternative light sensors can be arranged, for example, in the middle of the plasma source 204, as the light sensor 220 shows.
  • FIGS. 3A and 3B It can be seen from FIGS. 3A and 3B that the treatment with the plasma device was applicable to all tested tissues - dry or moist.
  • the plasma device could be moved gently over all tissues examined - no holding or entanglement was observed. No color changes or other damage were observed for any of the drying agents examined in this study. This result is independent of the number of wipe samples. However, when treating wet / damp tissues, some tissue samples showed damage, as marked in Fig. 3B in the respective sections of the photos.
  • Figures 4A and 4B show measurements of the plasma power consumed by a plasma source of a plasma device that applies cold atmospheric plasma to cotton fabrics with different humidity conditions.
  • the sample referred to as "50% wet fabric” is a cotton fabric that consists in equal parts of a wet area and a dry area, in which the plasma device is pushed back and forth between the wet area and the dry area.
  • the sample labeled "25% wet tissue” has a similar configuration with a reduced (ie, half) amount of liquid applied to the wet area.
  • Fig. 4A shows the pull-through at 30 pulls per minute
  • Fig. 4B shows the pull-through at 60 pulls per minute. The results show significant differences in the plasma performance depending on the moisture of the tissue, as explained in more detail below.
  • Fig. 4B shows that it was difficult to detect this difference for the 25% moist tissue and with a high take-off speed (60 swabs per minute). That means that it is crucial the power consumption of the plasma fast enough to identify the humidity range with the plasma power measurement method.
  • An example of a recording that is too slow is marked in Fig. 4B with an ellipse for the 25% moist tissue. It is therefore assumed that the power consumption of the plasma source should be recorded with a frequency of at least 10 s-1, preferably 50 s-1 and preferably 100 s-1.
  • a plasma device that is still able to supply the power consumption of the plasma source measure (eg by additionally including a plasma power consumption measuring system, which can be implemented by any known electrical circuit - a "performance monitor"), can even function as a humidity sensor.
  • the plasma device can also switch off automatically if the power exceeds a certain threshold value.
  • the device can be switched off automatically and / or the power delivered to the plasma source can automatically limited. Measurements such as these can be used to define the parameters required to control cold atmospheric plasma devices for refreshing clothing, to define operating conditions, to identify dry and damp parts of clothing and to adjust the plasma output accordingly to accommodate different ones To provide plasma settings for different tissues and to control the plasma power depending on the speed at which the refresher is moved over the tissue.
  • a nearly autonomous control system can be set up to ensure safe operation of the cold atmospheric plasma device under certain operating conditions. This helps ensure safe treatment of different tissues under different conditions.
  • the plasma source 500 includes a first electrode 502, a second electrode 504, and a dielectric layer 506 that separates the first electrode 502 and the second electrode 504.
  • the first electrode 502 is configured to ignite the cold atmospheric plasma for treating the surface to be treated. That is, the first electrode 502 is arranged so that it is closer to the surface to be treated than the second electrode.
  • the first electrode 502 is further covered with a dielectric material 508, which preferably consists of a plasma-resistant insulation material, for example a glass fiber-reinforced hydrocarbon ceramic.
  • the second electrode 504 preferably has a thickness of at least 10 ⁇ m
  • the first electrode 502 likewise viewed in the stacking direction, preferably having a thickness of at least 10 to at most 50 ⁇ m.
  • the dielectric layer 506 preferably has a thickness of at least 100 ⁇ m to a maximum of 300 ⁇ m.
  • the dielectric material 508 preferably has a thickness of at least 0.1 ⁇ m in the stacking direction.
  • the dielectric material 508 preferably has a thickness of at most 30 ⁇ m in the stacking direction, preferably at most 10 ⁇ m. The thickness can thus be between 0.1 pm and 30 pm or between 0.1 pm and 10 pm in the stacking direction.
  • the first electrode 502 and / or the second electrode 504 each include a coating 503 and a coating 505, which comprises one of the following materials: electroless nickel immersion gold (ENIG), electroless nickel, electroless nickel immersion gold (ENEPIG), electroless Nickel immersion gold (ENIPIG), electroless palladium (EP) and electroless palladium immersion gold (EPIG), hard gold.
  • the coating 503 and / or the coating 505 can have a thickness of at least 0.5 ⁇ m, preferably at least 0.8 ⁇ m.
  • the coating 503 and / or the coating 505 can have a thickness of 1.5 ⁇ m or less, preferably 1.25 ⁇ m or less.
  • the coating 503 and / or the coating 505 can thus have a thickness of 0.5 ⁇ m to 1.5 ⁇ m, preferably 0.8 ⁇ m to 1.25 ⁇ m, in particular if it is made from hard gold or another of the aforementioned materials .
  • the aforementioned stack structure is preferably constructed on a base element 510, on which the dielectric layer 506 can also be arranged and / or in which the second electrode 504 can be accommodated.
  • a plasma device can contain segmented plasma sources in which the basic structure shown in FIG. 5 can still be retained.
  • the plasma source 600A includes a first plasma source segment PQ1 and a second plasma source segment PQ2.
  • the plasma device 600A is configured to selectively turn on the first plasma source segment PQ1 only when a distance between the first plasma source segment and the surface to be treated is within the predetermined distance, and to selectively turn on the second plasma source segment PQ2 only when there is a distance between the second plasma source segment and the surface to be treated lies within the predetermined distance.
  • the selective switching on of each of the plasma source segments PQ1, PQ2 can be implemented, as described above, by a distance sensor and / or a light sensor and / or an actuator 900 according to FIG. 9.
  • each of the plasma source segments PQ1, PQ2 can be equipped with the above-mentioned safety measures such as the speed sensor, the surface property detection device, etc. independently of one another.
  • the plasma source 600A also includes a first electrode 602A, a second electrode 604A and an electrical layer that separates the first electrode 602A and the second electrode 604A, but which is not shown to better illustrate the arrangement of the electrodes.
  • the plasma source segments PQ1, PQ 2 are formed because the first electrode 602A includes a first electrode segment 602A-1 in the area of the first plasma source segment PQ1 and a second electrode segment 602A-2 in the area of the second plasma source segment PQ1.
  • the second electrode 604A may be a common electrode associated with the first and second electrode segments 602A-1, 602A-2.
  • FIG. 7A which shows a corresponding circuit diagram of the plasma source 600A
  • the plasma source segments PQ1 and PQ2 are electrically connected in parallel and can be activated or deactivated independently of one another.
  • FIG. 6B and 7B respectively, show a schematic diagram of a plasma source 600B and the corresponding circuit diagram thereof.
  • the plasma source 600B includes a first electrode 602B, a second electrode 604B, and a dielectric layer (not shown) that separates the first electrode 602B and the second electrode 604B.
  • the second electrode 604B includes a first electrode segment 604B-1 and a second electrode segment 604B-2.
  • the plasma source 600B also consists of the plasma source segments PQ1 and PQ2, which are connected electrically in parallel and can be activated and deactivated independently of one another, as shown in FIG. 7B.
  • a plasma device with a segmented plasma source is particularly suitable for treating larger areas.
  • Fig. 8 shows a schematic diagram of a plasma device with an exchangeable plasma source unit.
  • the plasma device 800 includes a plasma source unit 801 that is detachably coupled to a main housing 810.
  • the plasma source unit 801 contains, inter alia, the plasma source 802, the main housing 810 contains a battery module 803, which serves as a voltage source.
  • the main housing 810 also contains the charging electronics 807 for charging the battery module 803 and a control module 805 which is responsible for coordinating the respective functionalities of the plasma device 800.
  • the main housing 810 is furthermore equipped with a main switch 806 and a power supply interface 808.
  • the coupling between the plasma source unit 801 and the main housing 810 can be implemented, for example, by mechanical coupling means 804 and an electrical connection 809, which structurally and electrically connect the plasma source unit 801 and the main housing 810.
  • the coupling means 804 can be a pair of magnets.
  • other coupling methods such as mechanical coupling means (eg snap-on mounting or screws) are also possible.
  • the electrical connection 809 can for example in the form of a socket, as shown in Fig. 8, or some other suitable structure. In this way, the plasma source unit 801 can be replaced by another plasma source unit which, for example, can have a different shape electrode structure on the side facing the material to be treated. The application window for the plasma device 800 is thereby expanded.
  • the main housing 810 is preferably configured in such a way that no electrical energy is generated at the contacts of the electrical connection 809 provided on the main housing 810 if the plasma source unit 801 is separated and / or incorrectly coupled via the mechanical coupling means 804.
  • the main housing 810 and the plasma source unit 801 can be configured in such a way that the electrical circuit which supplies the contacts of the main housing 810 with voltage is not closed when the plasma source unit 801 is disconnected.
  • a sensor can be provided on the main housing 810 that checks whether there is a sufficient clutch.
  • a mechanical sensor can be provided so that the sensor is only pressed when the plasma source unit 801 is sufficiently coupled to the main housing 810. The sensor can be electrically connected to the control module 805.
  • the plasma device 900 shown there and according to the invention has an actuator for applying a cold atmospheric plasma to a surface to be treated, in particular to textiles, leather and / or plastic fibers
  • the actuator 913 which is designed to activate a plasma source 102, not designated in more detail in FIG. 9, but shown for example in FIG. 1, provided that a distance between the plasma source and the surface to be treated is within a predetermined distance, the actuator 913 being a adjustable and pre-tensioned actuator element
  • the actuator element 914 with at least one actuating element 915 and a detection device 916 which detects the position of the actuator element 914 at least if the distance between the plasma source and the surface to be treated is within the predetermined distance.
  • This also means that in this case the distance between the actuator element 914 and the actuator 913 is within a predefined distance.
  • the actuator element 914 can be adjusted in the direction of the actuator 913 if, for example, the plasma device 900 is positioned on a surface to be treated is put on. With the plasma device 900 according to the invention, special dangers due to incorrect operation by the customer can thus be avoided, since the plasma source is only activated when the distance to the clothing to be cleaned is within the predetermined distance.
  • the specified distance is in a range from 0 to 4 mm, preferably 0 to 1 mm. This has the particular advantage that, depending on the predefined parameter (eg distance), the plasma source or an individual plasma source segment can be activated and / or deactivated. This enables a further reduction in emissions and an increase in the overall efficiency of the plasma device 900.
  • a spring 917 an elastic plastic element such as a sealing lip, a foam element or a rubber element, or a pneumatic or hydraulic reset device is provided for biasing and resetting the actuator element 914.
  • the detection device 916 expediently has a proximity sensor, a contact sensor, a microswitch, a strain gauge, a magnetic sensor and / or a light barrier 918.
  • the actuator element 914 is provided with one or more actuation elements 915 in the device direction 919 in order to make the reliable contact of the plasma device 900 with the surface to be treated recognizable to electronics, here the detection device 916.
  • These actuation elements 915 can then be queried with any proximity or contact sensors, e.g. actuate microswitches or address other sensors provided with metal parts / magnets.
  • Strain gauges connected to a deformable material are also conceivable. As a result, the detection device 916 can be manufactured inexpensively and extremely flexibly.
  • the detection device 916 advantageously has the aforementioned light barrier 918 and the actuating element 915 has a beveled edge, the detection device 916 being designed in such a way that it provides a degree of coverage for the light barrier 918 and thus a distance between the plasma source and the upper surface to be treated. area determined. This makes it possible, by means of the detection device 916 having the light barrier 918, to display not only an “ON” or “OFF” position, but also intermediate positions that are dependent on the distance between the plasma source and the surface to be treated.
  • the detection device 916 has a light barrier 918 and is arranged on a circuit board 920, the circuit board 920 having an opening 921 which is crossed or covered by the light barrier 918 and in which the actuating element 915 engages, provided that the distance between the plasma source and the surface to be treated is within the predetermined distance.
  • the actuating element 915 thus engages through the opening 921, as a result of which a very space-saving design can be achieved.
  • the plasma device 900 can also have a display or control lamp that instructs the user to ventilate an area surrounding the plasma device 900 after the plasma source has been switched on for a predetermined period of time.
  • the plasma device 900 can also have a speed sensor for measuring a speed at which the plasma device 900 is moved over the surface to be treated, the plasma device 900 preferably automatically switching off the plasma source if the detected speed is below a first predetermined value or is above a second predetermined value. This can ensure that the plasma device 900 works in an optimal speed range, ie not too slowly (to keep the temperature at the interface between the plasma device 900 and the surface to be treated below the operating threshold, i.e. below the temperature that will damage the material to be treated can hold) and not too quickly (to fulfill the purpose of the treatment, e.g. to enable the malodorous molecules to be deactivated).
  • a surface property detection device in particular a temperature sensor or a moisture sensor, is expediently provided for detecting at least one property of the surface to be treated.
  • the at least one property can be a moisture content, a temperature, etc., for example.
  • the surface property detecting device preferably includes a humidity sensor for detecting the humidity level of the surface to be treated, wherein the plasma device 900 preferably automatically switches off the plasma source when the moisture content of the surface to be treated is higher than a given moisture value, thereby preventing the plasma device 900 from being operated at too high a power.
  • the moisture content of the surface to be treated can be determined by measuring the power consumed by the plasma source.
  • the surface properties detection device includes a temperature sensor for detecting the temperature of the surface to be treated
  • the plasma device 900 preferably automatically switching off the plasma source when the temperature of the surface to be treated is above a predetermined temperature value, thereby damaging the treated material is prevented.
  • the plasma device 900 is preferably portable and the voltage source has a battery or an accumulator. This means that mobile use is comparatively easy.
  • the plasma source can be interchangeable.
  • the plasma device 900 can be constructed such that the plasma source is housed in a plasma source unit of the plasma device 900 and the voltage source is housed in a main housing of the plasma device 900 and the plasma source unit is detachably coupled to the main housing.
  • a plasma device 900 can include, for example, the main housing and a series of plasma source units, each particularly suitable for a particular material to be treated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Textile Engineering (AREA)
  • Plasma Technology (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

La présente invention concerne un dispositif à plasma pour appliquer un plasma atmosphérique froid sur une surface à traiter, en particulier des textiles, du cuir et/ou des fibres plastiques, comportant un logement, une source de plasma disposée à l'intérieur de celui-ci, ainsi qu'une source de tension pour appliquer une tension à la source de plasma ; et ayant un actionneur qui est conçu pour activer la source de plasma à condition qu'une distance entre la source de plasma et la surface à traiter soit inférieure à une distance prédéterminée, l'actionneur comprenant un élément actionneur réglable et pré-chargé présentant au moins un élément d'activation et un dispositif d'enregistrement qui enregistre la position de l'élément actionneur au moins à condition que la distance entre la source de plasma et la surface à traiter soit inférieure à la distance prédéterminée. Le dispositif à plasma selon l'invention permet en particulier d'éviter les risques dus à une opération incorrecte par le client et d'éviter les émissions, puisque la source de plasma n'est activée que lorsque la distance du vêtement à nettoyer est inférieure à la distance prédéterminée.
EP20800960.5A 2019-11-19 2020-11-10 Dispositif à plasma Pending EP4062715A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP19210075.8A EP3826434A1 (fr) 2019-11-19 2019-11-19 Dispositif à plasma
DE102020206222.6A DE102020206222A1 (de) 2019-11-19 2020-05-18 Plasmavorrichtung
PCT/EP2020/081606 WO2021099181A1 (fr) 2019-11-19 2020-11-10 Dispositif à plasma

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EP4062715A1 true EP4062715A1 (fr) 2022-09-28

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EP19210075.8A Withdrawn EP3826434A1 (fr) 2019-11-19 2019-11-19 Dispositif à plasma
EP20800960.5A Pending EP4062715A1 (fr) 2019-11-19 2020-11-10 Dispositif à plasma

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US (2) US20220418075A1 (fr)
EP (2) EP3826434A1 (fr)
CN (1) CN114830835A (fr)
DE (2) DE102020206222A1 (fr)
GB (1) GB2602401A (fr)
WO (2) WO2021099181A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102020215098B4 (de) 2020-12-01 2022-12-22 BSH Hausgeräte GmbH Handgeführtes Textilbehandlungsgerät
DE102020215102A1 (de) * 2020-12-01 2022-06-02 BSH Hausgeräte GmbH Verfahren zum Ansteuern einer Plasmaquelle eines Geräts und Gerät
DE102020215101A1 (de) * 2020-12-01 2022-06-02 BSH Hausgeräte GmbH Gerät zur Behandlung eines Gegenstands mit Plasma und Betriebsverfahren

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EP2223704A1 (fr) * 2009-02-17 2010-09-01 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Dispositif de traitement d'une partie du corps d'un patient avec un plasma non thermique
WO2012150041A1 (fr) * 2011-05-05 2012-11-08 MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. Dispositif et procédé de traitement der surfaces au plasma, et utilisation dudit dispositif
US10300159B2 (en) * 2011-05-05 2019-05-28 Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V. Method for deactivating preferably odor-relevant molecules and device for carrying out said method
KR101407672B1 (ko) * 2013-07-30 2014-06-13 주식회사 다온비티아이 플라즈마 피부 처리 장치
DE102015004168A1 (de) * 2015-04-01 2016-10-06 Herbert Kannegiesser Gmbh Verfahren und Vorrichtung zum Nachbehandeln von Wäschestücken
US10849215B2 (en) * 2016-03-22 2020-11-24 Koninklijke Philips N.V. Cold plasma device for treating a surface
KR101716698B1 (ko) * 2016-04-15 2017-03-15 안선희 휴대용 플라즈마 미용장치
DE102017105410A1 (de) * 2017-03-14 2018-09-20 Epcos Ag Plasmagenerator
GB2566703A (en) * 2017-09-20 2019-03-27 Fourth State Medicine Ltd Control of thermal plasma generation

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EP3826434A1 (fr) 2021-05-26
DE112020005703T5 (de) 2022-09-08
WO2021099181A1 (fr) 2021-05-27
GB202203163D0 (en) 2022-04-20
US20220394841A1 (en) 2022-12-08
US20220418075A1 (en) 2022-12-29
WO2021099436A1 (fr) 2021-05-27
GB2602401A (en) 2022-06-29
DE102020206222A1 (de) 2021-05-20
CN114830835A (zh) 2022-07-29

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