CN117015126A - Carbon fiber spiral electrode, plasma generating device and air purifier - Google Patents
Carbon fiber spiral electrode, plasma generating device and air purifier Download PDFInfo
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- CN117015126A CN117015126A CN202311088558.5A CN202311088558A CN117015126A CN 117015126 A CN117015126 A CN 117015126A CN 202311088558 A CN202311088558 A CN 202311088558A CN 117015126 A CN117015126 A CN 117015126A
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 233
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 233
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 229
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 20
- 208000028659 discharge Diseases 0.000 description 99
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 238000004501 airglow Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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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
- H05H1/2431—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes using cylindrical electrodes, e.g. rotary drums
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/22—Ionisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/02—Single bars, rods, wires, or strips
-
- 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
- H05H1/4697—Generating plasma using glow discharges
Abstract
The invention relates to the technical field of plasma discharge, in particular to a carbon fiber spiral electrode, a plasma generating device and an air purifier. The spiral electrode comprises a carbon fiber electrode and a supporting wire, wherein the carbon fiber electrode is wrapped on the periphery of the supporting wire and is suitable for grounding; the inner electrode is wrapped by an insulating layer, is suitable for being connected with the high-voltage end of an alternating current power supply, and is spirally wound on the periphery of the insulating layer. The carbon fiber electrode can be restrained on the surface of the support wire by the support wire, and the carbon fiber electrode cannot be spread on the periphery of the insulating layer, so that the carbon fiber electrode occupies a large discharge area, and the discharge effect of the carbon fiber spiral electrode is prevented from being influenced. Therefore, the carbon fiber spiral electrode can avoid the carbon fiber bundles occupying a larger discharge area and has better discharge effect.
Description
Technical Field
The invention relates to the technical field of plasma discharge, in particular to a carbon fiber spiral electrode, a plasma generating device and an air purifier.
Background
With the development of social economy, the demands of residents on house interior decoration are also increasing. The use of large-scale decoration materials and building materials leads the concentration of formaldehyde, TVOC and other pollutants in indoor air to exceed the standard, and has influence on the health of people. At present, the purification method of indoor air pollution comprises a ventilation method, a plant purification method, a microbiological method, a physical and chemical adsorption method, a plasma method and the like.
Because high-energy electrons, excited particles, active groups and the like exist in low-temperature plasma, and harmful gases can be effectively catalytically degraded by utilizing plasma discharge, the low-temperature plasma is increasingly applied to the fields of air purification and the like. The plasma discharge comprises corona discharge and glow discharge, and the glow discharge has a large discharge area and a high plasma density, so that the plasma discharge has a good application prospect. In general, glow discharge plasma is often generated under a low-pressure or rare gas atmosphere.
The carbon fiber spiral electrode structure formed by the carbon fiber material in the related prior art can realize the effect of generating large-area glow discharge under the atmospheric pressure condition, can realize continuous and stable atmospheric pressure air glow discharge, and has better discharge effect. However, the applicant found that the existing carbon fiber bundles generally contain 1000-6000 carbon fiber filaments, which results in a wider overall width of the carbon fiber electrode, occupies the discharge area of the carbon fiber spiral electrode, and is not beneficial to improving the discharge effect of the carbon fiber spiral electrode.
Disclosure of Invention
In view of the above, the present invention provides a carbon fiber spiral electrode, a plasma generating device and an air purifier, so as to solve the problem that the carbon fiber spiral electrode occupies a larger discharge area in the prior art, resulting in the discharge effect of the carbon fiber electrode.
In a first aspect, the present invention provides a carbon fiber spiral electrode comprising:
the spiral electrode comprises a carbon fiber electrode and a supporting wire, wherein the carbon fiber electrode is wrapped on the periphery of the supporting wire and is suitable for grounding;
the inner electrode is wrapped by an insulating layer, is suitable for being connected with the high-voltage end of an alternating current power supply, and is spirally wound on the periphery of the insulating layer.
The beneficial effects are that: according to the carbon fiber spiral electrode, the carbon fiber electrode is wrapped on the outer side of the supporting wire, and then the spiral electrode is spirally wound on the periphery of the insulating layer, so that the carbon fiber electrode is restrained on the surface of the supporting wire, the carbon fiber electrode cannot be spread on the periphery of the insulating layer, and the problem that the carbon fiber electrode occupies a large discharge area to influence the discharge effect of the carbon fiber spiral electrode is avoided. Meanwhile, as the carbon fiber electrode is wrapped outside the supporting wire, the supporting wire can play a certain role in pressing the carbon fiber electrode, burrs are prevented from being generated in the discharging process of the carbon fiber electrode, the phenomenon of discharge breakdown of the tips of the burrs caused by the burrs is avoided, meanwhile, the discharge is more uniform, abnormal discharge is avoided, the service life of the carbon fiber spiral electrode is prolonged, excessive idle work generated by the discharge of the burrs is avoided, the problem of influencing the discharging efficiency is solved, and the carbon fiber spiral electrode always maintains good discharging performance, so that the requirement of long-acting removal of organic matters such as formaldehyde and the like can be met.
In an alternative embodiment, the support wire is an insulated wire.
The beneficial effects are that:
the means of generating glow discharge by the carbon fiber spiral electrode is dielectric barrier discharge, the insulating wire is made of insulating polytetrafluoroethylene fiber materials, the good capability of absorbing and releasing electrons plays a great auxiliary role in glow discharge, and the better the capability of absorbing and releasing electrons, the better the generated discharge.
As an alternative embodiment, the support wire is a metal wire. Through the arrangement, the metal support wire is easy to generate initial electrons under voltage, the initial electrons strike the carbon fiber electrode on the outer surface of the metal wire, the secondary excitation of the carbon fiber electrode is not violent, the problem of spark breakdown is avoided, the carbon fiber electrode can inhibit the problem that secondary discharge is too strong, and uniform and stable discharge is realized.
In an alternative embodiment, the carbon fiber electrode comprises a carbon fiber mesh woven from a plurality of carbon fiber filaments, the carbon fiber mesh being wrapped around the periphery of the support filaments; or alternatively, the first and second heat exchangers may be,
the carbon fiber electrode comprises a carbon fiber bundle which is spirally wound outside the supporting wire.
The beneficial effects are that:
when the carbon fiber electrode is the carbon fiber net, carbon fiber wires on the carbon fiber net can be mutually pressed, an external pressing structure is not required to be introduced, the pressing effect is good, burrs are avoided being generated in the discharging process of the carbon fiber electrode, the phenomenon of discharge breakdown of the tips of the burrs caused by the burrs is avoided, meanwhile, the discharge is even, abnormal discharge is avoided, the service life of the carbon fiber spiral electrode is prolonged, and meanwhile, the problem that excessive idle work is generated by the discharge of the burrs to influence the discharging energy efficiency is also avoided.
When the carbon fiber electrode is the carbon fiber net that the carbon fiber silk was woven, carbon fiber silk on the fiber net can suppress each other, need not to introduce external suppression structure, and the suppression is effectual, avoided the carbon fiber electrode to produce the burr at the in-process that discharges to avoid the burr point discharge breakdown phenomenon that leads to from this to take place, can make simultaneously discharge more even, avoid producing abnormal discharge, prolonged the life-span of carbon fiber spiral electrode, also avoided the burr to discharge and produced too much idle work simultaneously, influence the problem of discharging energy efficiency.
When the carbon fiber electrode is a carbon fiber bundle, carbon fiber filaments of the carbon fiber bundle are flatly wound on the surface of the supporting filaments. By this arrangement, the diameter of the spiral electrode (ideally, when the carbon fiber bundles are wrapped around the surface of the support wire in a flat shape, the diameter of the spiral electrode is the sum of the diameter of the support wire and the diameter of the carbon fiber wires on both sides thereof) can be significantly reduced.
And in the process of winding the spiral electrode on the inner electrode, even if the spiral electrode is pulled, the stress can not directly act on the carbon fiber bundles, the pulling force generated in the winding process is always the pulling force along the direction of the supporting wire, a certain included angle is formed between the pulling force and the extending direction of the carbon fiber bundles, and the pulling force can not directly act on the carbon fiber bundles, so that the risk that the carbon fiber bundles are pulled in the winding process to cause fuzzing and even are broken is greatly reduced.
Through such setting, can enough make the carbon fiber electrode more even of distribution on the support silk, make glow discharge on the insulating layer surface more even, can make the spiral electrode self diameter that the winding formed finer again, be difficult for taking the discharge area of carbon fiber spiral electrode.
And because the carbon fiber electrode is wrapped outside the supporting wire, in the process of winding the spiral electrode outside the insulating layer, the supporting wire can replace the carbon fiber electrode to bear the tensile force in the winding process, so that the tensile force generated in the winding process can not be fully acted on the carbon fiber electrode, and the risk of fuzzing and even breaking of the carbon fiber electrode due to pulling in the winding process is greatly reduced.
In an alternative embodiment, the diameter of the support wire is d1,0.01 mm.ltoreq.d1.ltoreq.3mm.
The beneficial effects are that:
when the diameter of the supporting wire is larger than the range, the diameter of the spiral electrode is larger, the spiral electrode occupies a larger discharge area, and the discharge effect of the carbon fiber spiral electrode is prevented from being improved. When the diameter of the supporting wire is smaller than the above range, there is a possibility that the strength of the supporting wire is insufficient and is easily broken during winding.
In an alternative embodiment, the mesh of the carbon fiber mesh is a polygonal hole, and the diameter of a circumscribing circle of the polygonal hole is d2, and d2 is 10 μm or less and 30 μm or less; or alternatively, the first and second heat exchangers may be,
the meshes of the carbon fiber net are round holes, and the diameters of the round holes are d3, d3 and d3 which are not less than 10 mu m and not more than 30 mu m.
In an alternative embodiment, the carbon fiber filaments of the carbon fiber bundle are wrapped around the surface of the support filaments in a flat pack.
In an alternative embodiment, the carbon fiber spiral electrode comprises a spiral electrode, the spiral electrode is wound at a pitch d4, and d4 is less than or equal to 1mm and less than or equal to 13mm; and/or the number of the groups of groups,
the carbon fiber spiral electrode comprises a plurality of spiral electrodes, the plurality of spiral electrodes are uniformly and alternately wound on the inner electrode, and the distance between two adjacent spiral electrodes is d5, d5 is more than or equal to 1mm and less than or equal to 13mm.
The beneficial effects are that:
when the carbon fiber spiral electrode comprises a plurality of spiral electrodes, under the condition that the pitch of the spiral electrodes is unchanged, the winding angle of a single wire around the spiral electrodes is larger, and the risk of increasing the burrs of the carbon fiber wires caused by the large winding radian of the spiral electrodes is avoided.
In an alternative embodiment, the inner electrode is a silver-plated copper wire; and/or;
the insulating layer is made of polytetrafluoroethylene.
In a second aspect, the invention also provides a plasma generating device, comprising the carbon fiber spiral electrode of the first aspect.
The beneficial effects are that: the plasma generating device provided by the embodiment of the invention comprises or uses the carbon fiber spiral electrode of the first aspect of the invention, so that the plasma generating device has the beneficial effect of avoiding the influence on the discharge effect of the carbon fiber spiral electrode caused by the fact that the carbon fiber electrode occupies a larger discharge area. Meanwhile, as the carbon fiber electrode is wrapped outside the supporting wire, the supporting wire can play a certain role in pressing the carbon fiber electrode, burrs are prevented from being generated in the discharging process of the carbon fiber electrode, the phenomenon of discharge breakdown of the tips of the burrs caused by the burrs is avoided, meanwhile, the discharge is more uniform, abnormal discharge is avoided, the service life of the carbon fiber spiral electrode is prolonged, excessive idle work generated by the discharge of the burrs is avoided, the problem of influencing the discharging efficiency is solved, and the carbon fiber spiral electrode always maintains good discharging performance, so that the requirement of long-acting removal of organic matters such as formaldehyde and the like can be met.
In a third aspect, the present invention also provides an air purifier comprising the plasma generating device of the second aspect of the present invention.
The beneficial effects are that: the air purifier of the third aspect of the invention comprises or uses the plasma generating device of the second aspect of the invention, thereby having the beneficial effect of avoiding that the carbon fiber electrode occupies a larger discharge area, and the discharge effect of the carbon fiber spiral electrode is affected. Meanwhile, as the carbon fiber electrode is wrapped outside the supporting wire, the supporting wire can play a certain role in pressing the carbon fiber electrode, burrs are prevented from being generated in the discharging process of the carbon fiber electrode, the phenomenon of discharge breakdown of the tips of the burrs caused by the burrs is avoided, meanwhile, the discharge is more uniform, abnormal discharge is avoided, the service life of the carbon fiber spiral electrode is prolonged, excessive idle work generated by the discharge of the burrs is avoided, the problem of influencing the discharging efficiency is solved, and the carbon fiber spiral electrode always maintains good discharging performance, so that the requirement of long-acting removal of organic matters such as formaldehyde and the like can be met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a support wire of a carbon fiber spiral electrode according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a spiral electrode of a carbon fiber spiral electrode according to an embodiment of the present invention;
FIG. 3 is an enlarged view at A in FIG. 2;
FIG. 4 is a cross-sectional view of a spiral electrode of a carbon fiber spiral electrode according to an embodiment of the present invention;
FIG. 5 is a schematic illustration of a spiral electrode of a carbon fiber spiral electrode according to an embodiment of the present invention;
FIG. 6 shows a perspective view of a carbon fiber spiral electrode according to an embodiment of the present invention, where the carbon fiber spiral electrode includes one spiral electrode in total;
fig. 7 is a perspective view of a carbon fiber spiral electrode according to an embodiment of the present invention, in which the carbon fiber spiral electrode includes two spiral electrodes in total.
Reference numerals illustrate:
1. a spiral electrode; 11. a carbon fiber bundle; 12. a support wire; 13. a carbon fiber web; 2. an inner electrode; 3. an insulating layer.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Embodiments of the present invention are described below in conjunction with fig. 1-4 and 6-7.
According to an embodiment of the present invention, in one aspect, there is provided a carbon fiber spiral electrode including a spiral electrode 1 and an inner electrode 2. Wherein the spiral electrode 1 comprises a carbon fiber electrode and a supporting wire 12, and the carbon fiber electrode is wrapped on the periphery of the supporting wire 12 and is suitable for grounding. The inner electrode 2 is wrapped with an insulating layer 3. The inner electrode 2 is suitable for being connected with the high-voltage end of an alternating current power supply, and the spiral electrode 1 is spirally wound on the periphery of the insulating layer 3.
The applicant has found that in operation, an electrical discharge is formed on the surface of the insulating layer 3 between two adjacent turns of carbon fibre bundles 11. The existing carbon fiber bundles 11 generally comprise 1000-6000 carbon fiber filaments. Therefore, once the carbon fiber bundles 11 are laid flat on the surface of the insulating layer 3, the discharge area of the carbon fiber spiral electrode is severely occupied, resulting in a reduction in the discharge effect of the carbon fiber spiral electrode.
According to the carbon fiber spiral electrode, the carbon fiber electrode is wrapped on the outer side of the supporting wire, and then the spiral electrode is spirally wound on the periphery of the insulating layer, so that the carbon fiber electrode is restrained on the surface of the supporting wire, the carbon fiber electrode cannot be spread on the periphery of the insulating layer, and the problem that the carbon fiber electrode occupies a large discharge area to influence the discharge effect of the carbon fiber spiral electrode is avoided. Meanwhile, as the carbon fiber electrode is wrapped outside the supporting wire, the supporting wire can play a certain role in pressing the carbon fiber electrode, burrs are prevented from being generated in the discharging process of the carbon fiber electrode, the phenomenon of discharge breakdown of the tips of the burrs caused by the burrs is avoided, meanwhile, the discharge is more uniform, abnormal discharge is avoided, the service life of the carbon fiber spiral electrode is prolonged, excessive idle work generated by the discharge of the burrs is avoided, the problem of influencing the discharging efficiency is solved, and the carbon fiber spiral electrode always maintains good discharging performance, so that the requirement of long-acting removal of organic matters such as formaldehyde and the like can be met.
And because the carbon fiber electrode is wrapped outside the supporting wire, in the process of winding the spiral electrode outside the insulating layer, the supporting wire can replace the carbon fiber electrode to bear the tensile force in the winding process, so that the tensile force generated in the winding process can not be fully acted on the carbon fiber electrode, and the risk of fuzzing and even breaking of the carbon fiber electrode due to pulling in the winding process is greatly reduced.
After a carbon fiber bundle containing about one thousand carbon fibers is wound around the inner electrode, the width of the spiral electrode in the prior art is generally 2 to 3mm, and the carbon fibers at a part of the positions are scattered, resulting in a larger width of the carbon fiber bundle. After the carbon fiber filaments were woven into a carbon fiber mesh and wrapped on the surface of the supporting filaments 12, the width of the spiral electrode 1 was about 0.5mm.
In one embodiment, as shown in fig. 2 and 3, the carbon fiber electrode includes a carbon fiber mesh woven from a plurality of carbon fiber filaments. The diameter of the individual carbon fiber filaments is preferably 7 to 9um.
Through such setting, carbon fiber silk on the carbon fiber net can suppress each other, need not to introduce external suppression structure, and the suppression is effectual, has avoided carbon fiber electrode to produce the burr at the in-process that discharges to avoid the burr point discharge breakdown phenomenon that leads to from this to take place, can make simultaneously discharge more even, avoid producing abnormal discharge, prolonged the life-span of carbon fiber spiral electrode, also avoided the burr to discharge simultaneously and produced too much idle work, influence the problem of discharging energy efficiency.
The mesh of the carbon fiber net is polygonal, the diameter of a circumcircle of the polygonal hole is d2, d2 is more than or equal to 10 mu m and less than or equal to 30 mu m;
as an alternative embodiment, the mesh of the carbon fiber mesh is a circular hole, and the diameter of the circular hole is d3, and d3 is more than or equal to 10 mu m and less than or equal to 30 mu m. When the diameter of the mesh of the carbon fiber mesh is smaller, the pressing effect of the carbon fiber filaments is better, and the discharging effect is good.
The carbon fiber spiral electrode may optionally include one or more spiral electrodes 1. In the embodiment shown in fig. 6, the carbon fiber spiral electrode includes a spiral electrode 1 spirally wound around the outer periphery of the insulating layer. The winding pitch of the spiral electrode 1 is d4, and d4 is more than or equal to 1mm and less than or equal to 13mm. As a preferred embodiment, the larger the diameter of the inner electrode 2, the smaller the pitch required. The smaller the diameter of the inner electrode 2, the larger the required pitch. At the same diameter, the larger the pitch, the smaller the plasma density. In a more preferred embodiment, 2.5 mm.ltoreq.d4.ltoreq.3.5 mm. Preferably, the helical electrode 1 is wound at a pitch of 3mm. The carbon fiber spiral electrode structure formed by tightly winding the spiral electrode 1 is adopted, a wrapped nonuniform electric field is generated on the whole electrode surface, and uniform glow discharge can be formed under 1.8kV alternating current voltage.
Preferably, the carbon fiber bundles 11 are carbon fiber nano bundles, the finer the diameter of the carbon fibers is, the better the carbon fiber bundles 11 comprise n carbon fiber filaments, and n is more than or equal to 20 and less than or equal to 1500.
Preferably, the carbon fiber bundles 11 in this embodiment are carbon fiber bundles composed of 50 carbon fiber filaments, and the diameter of each carbon fiber filament is 0.007um.
In the embodiment shown in FIG. 7, the carbon fiber spiral electrode comprises two spiral electrodes 1, the two spiral electrodes 1 are uniformly and alternately wound on the inner electrode 22, and the distance between the adjacent two spiral electrodes 1 is d5, and d5 is equal to or less than 1mm and equal to or less than 13mm. The larger the diameter of the inner electrode 2, the smaller the required pitch. The smaller the diameter of the inner electrode 2, the larger the required pitch. At the same diameter, the larger the pitch, the smaller the plasma density. In a more preferred embodiment, d5 is less than or equal to 2.5mm and less than or equal to 3.5mm, so that the single wire is wound around the spiral electrode 1 at a larger angle under the condition that the pitch of the spiral electrode 1 is unchanged, and the risk of increasing the burrs of the carbon fiber wires caused by the large winding radian of the spiral electrode 1 is avoided.
The inner electrode 22 may be a solid or hollow metal structure. The internal electrode can be in various shapes or diameters, and the discharge efficiency is higher when the diameter is smaller, but the process is complex, the diameter is large, the processing is easy, and the industrial batch production is facilitated.
In this embodiment, the inner electrode 22 is made of a metal material. Optionally, the inner electrode 22 is a metal wire, and the cross section of the inner electrode 22 is circular, elliptical, rectangular or other polygonal shape. Preferably, the inner electrode 22 is circular in cross-section.
Preferably, the inner electrode 22 is a silver wire. More preferably, the inner electrode 22 is silver-plated copper wire, and the inner electrode 22 has better conductive effect by adopting silver-plated copper wire.
As an alternative embodiment, the inner electrode is an insulating material coated with a conductive material. The conductive material is preferably but not limited to conductive metal materials such as metallic silver, copper, and tungsten.
There is no excessive restriction on the size of the diameter of the inner electrode 22, and in a preferred embodiment, the diameter of the inner electrode 22 is d6,0.1mm < d6 < 8mm. More preferably, the diameter of the inner electrode 22 is 1.2mm. The inner electrode 22 may be a solid or hollow metal structure.
Preferably, in this embodiment, the diameter of the support wire 12 is d1,0.01 mm.ltoreq.d1.ltoreq.3mm. When the diameter of the supporting wire 12 is larger than the above range, the diameter of the spiral electrode 1 is larger, the spiral electrode 1 occupies a larger discharge area, and the improvement of the discharge effect of the carbon fiber spiral electrode is hindered. When the diameter of the supporting wire 12 is smaller than the above range, there is a possibility that the supporting wire 12 is insufficient in strength and easily broken during winding. When the support wire 12 is selected as a nano-scale filament, the carbon fiber electrode can be wound with the nano-scale filament to form the spiral electrode 1 with smaller diameter, so that the spiral electrode 1 can occupy smaller discharge area, and the discharge effect of the carbon fiber spiral electrode is further improved.
In one embodiment, the support wire 12 is an insulating wire, for example, the insulating wire may be selected from any one of polytetrafluoroethylene fiber, polyamide fiber, and aramid fiber. Or, the insulating wire adopts one of a fluorine fiber wire, a fine nylon wire and an aramid fiber wire. Of course, the insulating wire is not limited to the above materials, and may be other insulating materials. Preferably, the insulating filaments are made of polytetrafluoroethylene fibers, and polytetrafluoroethylene fiber materials have good ability to absorb and release electrons.
In one embodiment, the means for generating glow discharge by the carbon fiber spiral electrode is dielectric barrier discharge, the insulating wire is made of insulating polytetrafluoroethylene fiber materials, the good capability of absorbing and releasing electrons plays a great auxiliary role in glow discharge, and the better the capability of absorbing and releasing electrons is, the better the generated discharge is.
As an alternative embodiment, the support wire 12 is a metal wire. By such arrangement, the metal support wire 12 is liable to generate initial electrons under voltage, the initial electrons strike the carbon fiber electrode on the outer surface of the metal wire, secondary excitation by the carbon fiber electrode is not violent, the problem of spark breakdown is not generated, and the carbon fiber electrode can suppress the problem of excessively strong secondary discharge, thereby realizing uniform and stable discharge.
Optionally, the insulating layer 33 is made of polytetrafluoroethylene, the thickness of which is w1, and the thickness of which is 0.001 um.ltoreq.w1.ltoreq.2200 um, and preferably, the thickness of the insulating layer 33 is 0.2mm, and the polytetrafluoroethylene may be uniformly sprayed on the outer surface of the inner electrode 22 by a spraying process to form the insulating layer 33.
According to a second aspect of the present invention, there is also provided a carbon fiber spiral electrode, as shown in fig. 5, which is different from the carbon fiber spiral electrode of the first aspect of the present invention in that, in this embodiment, the carbon fiber electrode is a carbon fiber bundle, and carbon fiber filaments of the carbon fiber bundle are wrapped around the surface of the support filament 12 in a flat shape. By this arrangement, the diameter of the spiral electrode 1 can be significantly reduced (ideally, when the carbon fiber bundles 11 are wound in a flat shape around the surface of the support wire 12, the diameter of the spiral electrode 1 is the sum of the diameter of the support wire 12 and the diameters of the carbon fiber wires on both sides thereof).
And in the process of winding the spiral electrode 1 on the inner electrode 2, even if the spiral electrode 1 is pulled, the stress can not directly act on the carbon fiber bundles, the pulling force generated in the winding process is always the pulling force along the direction of the supporting wire, a certain included angle is formed between the pulling force and the extending direction of the carbon fiber bundles, and the pulling force can not directly act on the carbon fiber bundles, so that the risk of fuzzing and even breaking of the carbon fiber bundles due to pulling in the winding process is greatly reduced.
Through such setting, can enough make the carbon fiber electrode more even of distribution on the support silk 12, make the glow discharge on the insulating layer 3 surface more even, can make the spiral electrode 1 self diameter that the winding formed finer again, be difficult for taking the discharge area of carbon fiber spiral electrode.
As an alternative embodiment, the carbon fiber electrode is woven integrally with the support wire 12.
Preferably, the carbon fibers of the carbon fiber bundles uniformly cover the entire surface of the support wire 12, enabling more uniform discharge of the carbon fiber spiral electrode.
In one embodiment, the spiral electrode 1 is uniformly wound on the inner electrode 2. The glow discharge on the surface of the insulating layer 3 can be more uniform.
According to a third aspect of the embodiments of the present invention, there is also provided a plasma generating apparatus including the carbon fiber spiral electrode in the above embodiments. By adopting the carbon fiber spiral electrode, the high-density plasma concentration can be generated under the condition of small volume, the volume of the plasma discharge equipment is greatly reduced, and the plasma discharge equipment can be used in any space needing to generate plasma. And the carbon fiber electrode can be restrained on the surface by the support wire 12, and the carbon fiber electrode can not be spread on the periphery of the insulating layer 3, so that the situation that the carbon fiber electrode occupies a large discharge area to influence the discharge effect of the carbon fiber spiral electrode is avoided.
Meanwhile, as the carbon fiber electrode is wrapped outside the supporting wire 12, the supporting wire 12 can play a certain role in pressing the carbon fiber electrode, burrs are prevented from being generated in the discharging process of the carbon fiber electrode, the phenomenon of discharge breakdown of the tips of the burrs caused by the burrs is avoided, meanwhile, the discharge is more uniform, abnormal discharge is avoided, the service life of the carbon fiber spiral electrode is prolonged, excessive idle work generated by the discharge of the burrs is avoided, the problem of influencing the discharging efficiency is solved, and the carbon fiber spiral electrode always maintains good discharging performance, so that the requirement of long-term removal of organic matters such as formaldehyde and the like of products can be met.
According to a third aspect of the embodiments of the present invention, there is also provided an air purifier including the plasma generating device of embodiment 2 described above.
By adopting the carbon fiber spiral electrode, the high-density plasma concentration can be generated under the condition of small volume, the volume of the plasma discharge equipment is greatly reduced, the plasma discharge equipment can be used in any space needing to generate plasma, the carbon fiber electrode can be restrained on the surface by the support wire 12, the carbon fiber electrode can not be spread on the periphery of the insulating layer 3, the large discharge area occupied by the carbon fiber electrode is avoided, and the discharge effect of the carbon fiber spiral electrode is influenced.
Meanwhile, as the carbon fiber electrode is wrapped outside the supporting wire 12, the supporting wire 12 can play a certain role in pressing the carbon fiber electrode, burrs are prevented from being generated in the discharging process of the carbon fiber electrode, the phenomenon of discharge breakdown of the tips of the burrs caused by the burrs is avoided, meanwhile, the discharge is more uniform, abnormal discharge is avoided, the service life of the carbon fiber spiral electrode is prolonged, excessive idle work generated by the discharge of the burrs is avoided, the problem of influencing the discharging efficiency is solved, and the carbon fiber spiral electrode always maintains good discharging performance, so that the requirement of long-term removal of organic matters such as formaldehyde and the like of products can be met.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. A carbon fiber spiral electrode, comprising:
a spiral electrode (1) comprising a carbon fiber electrode and a support wire (12), the carbon fiber electrode being wrapped on the outer circumference of the support wire (12) and adapted to be grounded;
the inner electrode (2) is wrapped by an insulating layer (3), the inner electrode (2) is suitable for being connected with the high-voltage end of an alternating current power supply, and the spiral electrode (1) is spirally wound on the periphery of the insulating layer (3).
2. The carbon fiber spiral electrode according to claim 1, characterized in that the carbon fiber electrode comprises a carbon fiber mesh woven from a plurality of carbon fiber filaments, the carbon fiber mesh being wrapped on the outer circumference of the support filaments (12); or alternatively, the first and second heat exchangers may be,
the carbon fiber electrode comprises a carbon fiber bundle which is spirally wound outside the supporting wire (12).
3. The carbon fiber spiral electrode according to claim 2, wherein the mesh of the carbon fiber mesh is a polygonal hole, and the diameter of a circumcircle of the polygonal hole is d2, and d2 is 10 μm or less and 30 μm or less; or alternatively, the first and second heat exchangers may be,
the mesh of the carbon fiber net is a circular hole, and the diameter of the circular hole is d3, and d3 is more than or equal to 10 mu m and less than or equal to 30 mu m.
4. The carbon fiber spiral electrode according to claim 2, wherein the carbon fiber filaments of the carbon fiber bundle are wound in a flat package on the surface of the support filaments (12).
5. The carbon fiber spiral electrode according to any one of claims 1 to 4, wherein the diameter of the support wire (12) is d1,0.01mm ∈d1 ∈3mm.
6. The carbon fiber spiral electrode according to any one of claims 1 to 4, wherein the support wire (12) is an insulating wire.
7. The carbon fiber spiral electrode according to any one of claims 1 to 4, wherein the carbon fiber spiral electrode comprises one spiral electrode (1), the spiral electrode (1) is wound at a pitch d4, d4 is 1 mm-13 mm; and/or the number of the groups of groups,
the carbon fiber spiral electrode comprises a plurality of spiral electrodes (1), the spiral electrodes (1) are uniformly and alternately wound on the inner electrode (2), the distance between two adjacent spiral electrodes (1) is d5, and d5 is more than or equal to 1mm and less than or equal to 13mm.
8. The carbon fiber spiral electrode according to any of claims 1 to 4, characterized in that the inner electrode (2) is a silver-plated copper wire; and/or;
the insulating layer (3) is made of polytetrafluoroethylene.
9. A plasma generating device comprising the carbon fiber spiral electrode of any one of claims 1 to 8.
10. An air cleaner comprising the plasma generating device of claim 9.
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| CN202311088558.5A CN117015126A (en) | 2023-08-25 | 2023-08-25 | Carbon fiber spiral electrode, plasma generating device and air purifier |
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| CN202311088558.5A CN117015126A (en) | 2023-08-25 | 2023-08-25 | Carbon fiber spiral electrode, plasma generating device and air purifier |
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