CN114314518A - Discharge body, electric field device and ozone generator - Google Patents

Abstract

The invention discloses a discharge body, an electric field device and an ozone generator, wherein the discharge body at least comprises a conductor, a first medium and a second medium, the first medium is arranged on the surface of the conductor and surrounds at least one part of the conductor, and the second medium is arranged on the surface of the first medium. The discharge body can achieve the technical effects of discharging and controlling not to be broken down.

Description

Discharge body, electric field device and ozone generator

Technical Field

The invention relates to a discharge body, an electric field device and an ozone generator.

Background

Gas discharge (plasma) method: the most commonly used method is the dielectric barrier discharge method, abbreviated as DBD method, which is a non-equilibrium gas discharge with an insulating dielectric inserted into the discharge space, also called dielectric barrier corona discharge or silent discharge.

In the existing dielectric barrier technology, a commonly used glass tube is sleeved on a discharge electrode as a dielectric, on one hand, the glass tube and the discharge electrode are not well fixed, so that the glass tube is easy to break in transportation and use, and on the other hand, the electric field charge efficiency of the dielectric barrier technology is not high and the energy consumption is overhigh.

Disclosure of Invention

The invention provides a discharge body, an electric field device and an ozone generator, and aims to solve the problems of low electric field charge efficiency, high energy consumption, low treatment efficiency and the like in the prior art.

According to an aspect of the invention, a discharge is provided, comprising at least a first medium, a second medium and a conductor, wherein the first medium is provided at a surface of the conductor and arranged around at least a part of the conductor and the second medium is provided at a surface of the first medium.

In one embodiment, the first medium is made of a clay material and/or the second medium is made of a vitreous material.

In one embodiment, the conductor includes at least a first section and a second section, a first dielectric disposed around a surface of the first section, and a second dielectric disposed around a surface of the first dielectric.

In one embodiment, the first dielectric forms a uniform first thickness d1 at the surface of the conductor.

In one embodiment, the second dielectric forms a uniform second thickness d2 at the surface of the conductor.

In one embodiment, the first thickness d1 and the second thickness d2 satisfy the following relationship: d2 ≦ d1, preferably d1>1 mm.

In one embodiment, the first medium and the second medium have different conductivities.

In one embodiment, the first dielectric and the second dielectric are insulating dielectrics.

In one embodiment, the first medium has a first end adjacent to the second section and a second end opposite the first end, the end face of the first end being provided with an anti-creep structure.

In one embodiment, the anti-creep structure is a recess provided on the first end face of the first medium, the recess being disposed around the conductor.

In one embodiment, the anti-creeping structure is a protrusion provided on the end face of the first end, and the protrusion is arranged around the conductor.

In one embodiment, the conductor is made of metal.

In one embodiment, the metal is low carbon steel.

In one embodiment, the first medium is a ceramic and/or the second medium is a glaze.

In one embodiment, the recess is any one or more of funnel-shaped, cylindrical and circular.

In one embodiment, the conductor comprises a first section, a second section and a third section which are connected in sequence, a first medium is arranged around the surface of the second section, a second medium is arranged around the surface of the first medium, and anti-creeping structures are respectively arranged on the end faces at two ends of the first medium.

In one embodiment, the first medium is arranged around the surfaces of the first section and the third section respectively, the second medium is arranged around the surface of the first medium, and at least the end face, close to the second section, of the first medium is provided with the anti-creeping structure respectively.

According to another aspect of the present invention, there is also provided an electric field device comprising a first pole having a plate-like body provided with a plurality of discharge holes, and a second pole being the discharge body as described above, wherein the portion of the discharge body provided with the medium is inserted into the discharge holes and forms a gap with the inner wall of the discharge holes.

In one embodiment, the discharge holes are through holes.

In one embodiment, an insulating film is disposed on an inner wall of the discharge hole with a gap between an outer surface of the second dielectric and the insulating film.

In one embodiment, the gap is in the range of 0.5 to 5 mm.

In one embodiment, the gap has a distance in the range of 0.5 to 1.5 mm.

According to another aspect of the present invention, there is also provided a method of manufacturing a discharge body, comprising the steps of:

the method comprises the following steps that firstly, a first discharge body is provided with a conductor and ceramic, and a second discharge body is obtained after glaze slurry is coated on the ceramic surface of the first discharge body;

step two, drying the second discharge body to obtain a third discharge body;

step three, firing the third discharge body at a high temperature to obtain a fourth discharge body; and

and step four, cooling the fourth discharge body to obtain a finished product of the dual-medium discharge body.

In one embodiment, the method further comprises, before the first step, the steps of: before the ceramic surface is coated with the glaze slurry, the ceramic is disposed on the conductor to obtain a first discharge body.

In one embodiment, the method further comprises the steps of: and processing an anti-creeping structure on the ceramic layer end face at the end part of the first discharge body.

In one embodiment, the anti-creep structure is a recess disposed on the first end face, the recess disposed around the conductor.

In one embodiment, the anti-creeping structure is a protrusion arranged on the end surface of the first end, and the protrusion is arranged around the conductor.

In one embodiment, the recess is any one of funnel-shaped, cylindrical and circular.

In one embodiment, in the second step, the second discharge body is dried at a temperature of 90-250 ℃ for 5-10 minutes, and/or

In the third step, the third discharge body is fired at high temperature in the furnace temperature range of 800-900 ℃ for 4-10 minutes, and/or

In the fourth step, the fourth discharge body is naturally cooled to room temperature in a low-temperature region below 600 ℃.

According to another aspect of the present invention there is also provided an ozone generator comprising a housing and an electric field device as described above, the electric field device being mounted within the housing.

The invention provides a discharge body comprising a conductor, a first medium and a second medium, wherein the first medium is arranged on the surface of the conductor and surrounds at least one part of the conductor. The discharge body of the invention is in a limited discharge mode, has the technical effects of achieving discharge and controlling not to be punctured, and can effectively eliminate the creepage phenomenon when the discharge body is provided with the creepage preventing structure.

Drawings

FIG. 1 is a schematic view of an ozone generator in accordance with a first embodiment of the present invention;

FIG. 2 is a schematic view of a discharge in an embodiment of the present invention;

FIG. 3 is an enlarged partial schematic view of A in FIG. 2;

FIG. 4 is a schematic diagram of an anti-creep structure in an embodiment of the present invention;

FIG. 5 is a schematic view of an ozone generator according to a second embodiment of the present invention;

FIG. 6 is a schematic view of an ozone generator in a third embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

The present invention generally relates to a discharge body and an electric field device and an ozone generator comprising the discharge body. The discharge body comprises at least a conductor, a first medium and a second medium, wherein the first medium is arranged on the surface of the conductor and surrounds at least one part of the conductor, and the second medium is arranged on the surface of the first medium. The first medium and the second medium can not only increase the thickness of the medium layer, but also make up the defects of the first medium through the selected second medium.

In one embodiment, the first medium is made of a clay material and the second medium is made of a vitreous material.

In one embodiment, the first dielectric and the second dielectric are both insulating dielectrics, which herein is meant to be insulating dielectrics in the usual sense in the art, i.e. dielectrics which are not electrically conductive under certain conditions, without excluding electrical conductivity under particular conditions.

The discharge body, the electric field device and the ozone generator according to the present invention will be described in detail with reference to the accompanying drawings.

Example one

Fig. 1 is a schematic structural view of an ozone generator according to the first embodiment. As shown in fig. 1, the ozone generator comprises a housing 100, the housing 100 having an inlet 101 and an outlet 102, and an electric field device mounted in the housing 100 and comprising a first electrode 1 and a second electrode 2, the first electrode 1 and the second electrode 2 forming an electric field when energized. In the present embodiment, the first electrode 1 has a plate-like body provided with a number of discharge holes 3. The first electrode 1 is fixedly connected with the inner wall of the shell 100 through a conductive fixing member 4, and the second electrode 2 is a plurality of discharge bodies with media arranged on the surface, and the discharge bodies are at least partially arranged in the discharge holes 3 of the first electrode 1. In one embodiment, the first electrode 1 and the discharge body constitute a discharge cell, and the electric field means comprises a plurality of discharge cells.

Specifically, in the present embodiment, the discharge hole 3 is a through hole, one end of the surface of the second electrode 2, which is provided with the medium, is disposed in the through hole of the first electrode 1, and the other end is disposed in the second electrode support plate 5. The outer surface of the discharge body, in particular the outer surface of the dielectric, has a gap with the inner wall of the hole 3, preferably at a distance in the range of 0.5-5mm, more preferably at a distance in the range of 0.5-1.5mm, in this embodiment at a distance of 1 mm.

Fig. 2 is a schematic view of the structure of the discharge body 2. As shown in fig. 2, the discharge body 2 is for dielectric barrier discharge and comprises a conductor 10 and a dielectric 20, the dielectric 20 being arranged outside the conductor 10 and surrounding at least a part of the conductor 10. At least one part of the discharge body 2 provided with the medium 20 is arranged in the discharge hole 3 of the first electrode 1, one end of the discharge body 2 not provided with the medium 20 is fixed by a second electrode supporting plate 5, the second electrode supporting plate 5 is provided with a plurality of through holes 501, and gas can flow through the second supporting plate 5 to reach the second electrode 2 through the through holes 501 on the second electrode supporting plate 5.

With continued reference to fig. 2, the conductor 10 includes at least a first segment and a second segment, and in this embodiment, the conductor 10 includes a first segment 11 and a second segment 12. The dielectric 20 is disposed on the surface of the first segment 11 of the conductor 10 and arranged around the first segment 11, and one end of the conductor 10 is located inside the dielectric 20 and the other end is located outside the dielectric 20.

In one embodiment, the conductor 10 is made of metal and has an elongated structure, for example, the conductor 10 can be made of any one of low carbon steel, 45 steel, stainless steel and alloy steel, preferably, low carbon steel.

Fig. 3 is a partially enlarged view of a in fig. 2. As shown in fig. 3, the dielectric 20 includes at least a first dielectric 24 and a second dielectric 25, the first dielectric 24 being disposed on a surface of the conductor 10 and disposed around at least a portion of the conductor 10, the second dielectric 25 being disposed on a surface of the first dielectric 24 and disposed around the first dielectric 24. In this embodiment, the first medium 24 is disposed on the surface of the first section 11 and surrounds the first section 11, and the second medium 25 is disposed on the surface of the first medium 24 and surrounds the first medium 24. Preferably, the first medium 24 is made of a clay material and the second medium 25 is made of a vitreous material.

For example, in the present embodiment, the medium 20 may include only the first medium 24 and the second medium 25, the first medium 24 being made of ceramic, and the second medium 25 being made of glaze. The ceramic is wrapped around the surface of the first section 11 of the conductor 10, for example by firing, and the glaze is disposed on the surface of the ceramic on the surface of the first section 11 of the conductor 10. Preferably, the media 20 as a whole forms a cylindrical structure.

In the embodiment, the glaze is used as the second medium to be coated on the surface of the first medium, so that the ceramic surface is covered on the pores and is resistant to high pressure. Due to the excellent performance of the glaze, the dielectric barrier discharge body has the excellent technical effects of high voltage resistance and good economical efficiency.

In one embodiment, the ceramic forms a uniform first thickness d1 on the surface of the conductor 10, and preferably, the first thickness d1 is in the range of 1.5-2 mm. The glaze forms a uniform second thickness d2 on the surface of the ceramic, the second thickness d2 preferably ranging between 0.1 mm and 0.25 mm.

Referring back to fig. 2, in the present embodiment, the length of the first section 11 of the conductor 10 is greater than the depth of the discharge hole 3, i.e., the length of the portion covered by the dielectric 20 is greater than the depth of the discharge hole 3, but it is understood by those skilled in the art that the dielectric 20 may also completely cover the entire conductor 10.

Referring to fig. 2, in one embodiment, the dielectric 20 has a first end 21 close to the second segment 12 of the conductor 10 and a second end 22 opposite to the first end 21, the end surface of the first end 21 is provided with a creepage preventing structure 23, and the creepage preventing structure 23 can eliminate discharge traces on the surface of the insulating dielectric 20 and prevent the insulating layer from being damaged.

For example, the anti-creepage structure 23 may be a recess provided on the end face of the first end 21 of the medium 20, the recess being arranged around the conductor 10. That is, the recess forms an annular structure, and the conductor 10 is located inside the annular structure, preferably at the center of the annular structure. The recess can be any one or more of funnel shape, column shape and circular ring shape.

In the embodiment shown in fig. 2, the anti-creeping structure 23 is a recessed portion formed by axially inwardly recessed the end surface of the first end 21, and the depth of the recessed portion is reduced from outside to inside, so that the recessed portion is formed in a funnel shape as a whole. (creepage phenomenon means that the surface of the insulator between two poles has slight discharge phenomenon, which causes the surface of the insulator to be (generally) dendritic or tree-leaf channel-shaped discharge trace, generally the discharge trace is not communicated with two poles, the discharge is generally not continuous, and the discharge is influenced by the working temperature and time and can cause insulation damage after a long time.)

Of course, as shown in fig. 4, in another embodiment, the anti-creeping structure may also be a projection 211 provided on the end face of the first end 21, the projection 211 being arranged around the conductor 10 with a concave portion between the projection 211 and the conductor 10.

It should be noted that although the discharge body shown in fig. 2 includes the anti-creeping structure, it is understood by those skilled in the art that the technical effect of the dielectric barrier discharge can be achieved by providing at least two layers of dielectric on at least a part of the outer surface of the conductor 10 even if the anti-creeping structure is not provided.

The discharge body is used for dielectric barrier discharge, is in a limited discharge mode, can achieve discharge and control not to be punctured, can effectively eliminate creepage when being provided with a creepage preventing structure, and has the effect of eliminating creepage when being provided with glaze.

In use, for example, one electrode of the ac power supply 200 may be electrically connected to the second electrode supporting plate 5, and the other electrode of the ac power supply 200 may be electrically connected to the casing 100. When the current is applied, an electric field is formed between the first electrode and the second electrode.

In this embodiment, one electrode of the ac power supply 200 may be grounded, and the casing 100 may also be grounded. In this embodiment, the voltage of the ac power supply 200 may be between 4 KV and 20KV, and the frequency conversion pulse range may be between 5kHz and 80 kHz.

A method of making the discharge body 2 of the present invention is described below, it being noted that this method is merely exemplary and is not intended to limit the discharge body of the present invention to be made by the following method, and one skilled in the art can make the discharge body of the present invention by any suitable method.

A method of making a discharge of the present invention may comprise the steps of:

step one, preparing a conductor.

For example, alloy steel may be prepared as the conductor, and in the examples, the specification of the alloy steel is selected

And step two, arranging ceramic on the conductor to obtain a first discharge body.

The diameter of the first discharge may, for example, in embodiments lie between 5mm and 6 mm.

And step three, coating glaze slurry on the ceramic surface of the first discharge body to obtain a second discharge body, namely the ceramic rod.

The glaze slurry is uniformly coated on the ceramic part of the surface of the porcelain rod in a way of spraying or dipping the glaze slurry on the surface of the porcelain rod.

And step four, drying the second discharge body to obtain a third discharge body.

And step three, after the glaze is uniformly coated on the ceramic part on the surface of the porcelain rod, putting the porcelain rod into a drying furnace for drying, wherein the temperature of the drying furnace can be controlled within a range of 100-200 ℃, and the drying time can be controlled within a range of 5-10 minutes, so as to ensure the drying moisture.

And step five, firing the third discharge body at a high temperature to obtain a fourth discharge body.

And (3) placing the porcelain rod dried in the fourth step into a firing furnace for high-temperature firing, wherein the temperature of the firing furnace can be controlled within the range of 840-860 ℃, the firing time can be controlled within 5-8 minutes, and the specifications after enamel in the embodiment are as follows:

and step six, cooling the fourth discharge body to obtain a finished product of the dual-dielectric barrier discharge body.

And putting the fourth discharge body in the step five into a low-temperature area below 600 ℃ for naturally cooling to room temperature to obtain a finished product of the double-medium barrier discharge body.

Thickness of enamel: 0.15-0.25 mm;

cooling the fourth discharge body to obtain a finished product of the dual-dielectric barrier discharge body;

the enamel can be repeatedly coated when the thickness is not reached once.

In an embodiment of the present invention, a method for manufacturing a dielectric barrier discharge body may include the following steps:

firing ceramic on the conductor to obtain a first discharge body with an anti-creeping structure;

preferably, the anti-creeping structure is a recess arranged on the end face of the first end, and the recess is arranged around the conductor.

Preferably, the anti-creeping structure is a protrusion arranged on the end face of the first end, and the protrusion is arranged around the conductor.

Cleaning the surface of the ceramic with sand paper;

coating glaze slurry on the ceramic surface of the first discharge body to obtain a second discharge body,

spraying or soaking the surface of the porcelain rod to uniformly coat the surface with glaze slurry (only the ceramic part);

drying the second discharge body to obtain a third discharge body;

firing the third discharge body at a high temperature to obtain a fourth discharge body;

and (3) high-temperature firing: placing the dried ceramic rod into a firing furnace for high-temperature firing at 840-860 ℃ for 5-8 minutes; and (4) specification after enamel coating:

and (3) cooling: after sintering, the mixture enters a low-temperature region below 600 ℃ and is naturally cooled to room temperature; thickness of enamel: 0.15-0.25 mm;

cooling the fourth discharge body to obtain a finished product of the dual-dielectric barrier discharge body;

the enamel can be repeatedly coated when the thickness is not reached once.

Example two

The main difference between the present embodiment and the first embodiment is in the structure of the discharge body and the electric field and the arrangement of the electrode supporting plate, and other parts are the same as the first embodiment, and only different parts are described herein.

The conductor of this embodiment includes consecutive first section, second section and third section, and the medium encircles the surface setting of second section, is equipped with anti-creep electricity structure on the terminal surface at medium both ends on the second section respectively.

As shown in fig. 5, the first electrode 1 is plate-shaped, and has a plurality of holes 3, and the first electrode 1 is fixedly connected to the inner wall of the housing 100 through the conductive fixing member 4; the second electrode 2 is a discharge body with a medium on the surface, and the two second electrode supporting plates 5 are respectively arranged on two sides of the first electrode 1.

The hole 3 is a through hole, one end of the surface of the second electrode 2 provided with the medium penetrates through the through hole of the first electrode 1, and two ends of the surface of the second electrode are respectively arranged in the second electrode supporting plate 5. The outer surface of the medium of the discharge body and the inner wall of the hole 3 are provided with a gap, the distance of the gap is 0.5-1.5mm, in the embodiment, the distance of the gap is 0.5mm, wherein, the medium and the anti-creeping structure in the embodiment are the same as the medium 20 and the anti-creeping structure in the first embodiment.

EXAMPLE III

The main difference between the present embodiment and the first embodiment is in the structures of the discharge body and the electric field, other parts are the same as the first embodiment, only different parts are described herein, and the same parts refer to the related description of the first embodiment and are not described herein in detail.

The electric field means comprise two first electrodes 1 and one second electrode 2. The second electrode support plate 5 is arranged between the two first electrodes 1. The conductor comprises a first section, a second section and a third section which are connected in sequence, and the medium is arranged around the surfaces of the first section and the third section respectively. And in the embodiment, the anti-creeping structures are respectively arranged on the end surface of the medium on the first section, which is close to the second section, and the end surface of the medium on the third section, which is close to the second section.

As shown in fig. 6, the first electrode 1 is plate-shaped, and has a plurality of holes 3, and the first electrode 1 is fixedly connected to the inner wall of the housing 100 through the conductive fixing member 4; the second electrode 2 is a dielectric barrier discharge body with an insulating medium on the surface, the hole 3 is a through hole, the second section of the conductor is arranged in the second electrode supporting plate 5, and two ends of the second electrode 2 with the medium on the surface are respectively arranged in the through holes of the two first electrodes 1 in a penetrating way. The outer surface of the medium of the discharge body and the inner wall of the hole 3 are provided with a gap, the distance of the gap is 0.5-1.5mm, in the embodiment, the distance of the gap is 1.5mm, wherein, the medium and the anti-creeping structure in the embodiment are the same as the medium 20 and the anti-creeping structure in the first embodiment.

Example four

The main difference between the first embodiment and the second embodiment is that the discharge body structure is the same as that of the first embodiment, and only different portions are described herein.

In this embodiment, both ends of the conductor are located outside the dielectric.

EXAMPLE five

The main difference between the first embodiment and the second embodiment is that the discharge body structure is the same as that of the first embodiment, and only different portions are described herein.

In this embodiment, a plurality of spikes are disposed on a surface of the first section of the conductor located in the medium, and the spikes can implement point discharge.

EXAMPLE six

The main difference between the present embodiment and the first embodiment is that the first electrode structure has the same structure as the first embodiment, and only different portions are described herein, and the same portions refer to the related description of the first embodiment and are not described in detail herein.

In this embodiment, an insulating film is attached to the inner wall of the hole 3 in the first electrode 1, and a gap is provided between the outer surface of the dielectric of the discharge body and the insulating film. The distance of the gap is 0.5-1.5mm, and in the embodiment, the distance of the gap is 1.1 mm.

EXAMPLE seven

The main difference between the present embodiment and the fourth embodiment is that the first electrode structure is the same as that of the fourth embodiment, and only different portions are described herein, and reference is made to the related description of the fourth embodiment for the same portions, which is not described herein in detail.

In this embodiment, an insulating film is attached to the inner wall of the hole 3 in the first electrode 1, and three-dielectric discharge is performed. A gap is provided between the outer surface of the dielectric and the insulating film. The distance of the gap is 0.5-1.5mm, and in the embodiment, the distance of the gap is 1.2 mm. Both ends of the conductor are positioned outside the medium, the conductor end positioned in the hole 3 is arranged to be a tip, and enamel firing is carried out on the surface of the conductor end.

Example eight

The main difference between the present embodiment and the fifth embodiment is that the first electrode structure has the same structure as that of the fifth embodiment, and only different portions are described herein, and reference is made to the related description of the fifth embodiment for the same portions, which is not described herein in detail.

In this embodiment, an insulating film is attached to the inner wall of the hole 3 in the first electrode 1. A gap is provided between the outer surface of the dielectric of the discharge body and the insulating film. The distance of the gap is 0.5-5mm, and in the embodiment, the distance of the gap is 1.5 mm.

The discharge body provided by the embodiment comprises a conductor, a first medium and a second medium, wherein the first medium is arranged on the surface of the conductor and surrounds at least one part of the conductor, and the end face of the first medium is provided with an anti-creeping structure.

The discharge body of the embodiment is used for dielectric barrier discharge, is in a limited discharge mode, can achieve discharge and can be controlled not to be broken down, and when the discharge body is provided with a creepage preventing structure, the creepage phenomenon can be effectively eliminated.

Further, the embodiment adopts the glaze as the second medium to coat the surface of the first medium, and the glaze also has excellent creepage preventing performance, so that the discharge body has the excellent technical effects of high voltage resistance, creepage prevention and good economical efficiency.

Further, the anti-creeping structure in the embodiment is a concave part formed by inwards concave along the axial direction on the end surface of the first end, the depth of the concave part is reduced from outside to inside, so that the funnel shape is formed integrally, and the structure can effectively eliminate the creeping phenomenon.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the invention can be effected therein by those skilled in the art after reading the above teachings of the invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (22)

1. A discharge body, characterized in that the discharge body comprises at least a first medium, a second medium and a conductor, wherein the first medium is arranged on the surface of the conductor and surrounds at least a part of the conductor, and the second medium is arranged on the surface of the first medium.

2. The discharge body according to claim 1, characterized in that the first medium is made of a clay material and/or the second medium is made of a vitreous material.

3. The discharge body of any of claims 1-2, wherein the conductor comprises at least a first section and a second section, the first medium being disposed around a surface of the first section, and the second medium being disposed around a surface of the first medium.

4. The discharge body according to any of claims 1-3, wherein said first medium forms a uniform first thickness d1 at the surface of said conductor.

5. The discharge body of claim 4, wherein the second medium forms a uniform second thickness d2 at the surface of the conductor.

6. The discharge body of claim 5, wherein the first thickness d1 and the second thickness d2 satisfy the following relationship: d2 ≦ d 1.

7. The discharge according to any of claims 1 to 5, wherein said first medium and said second medium have different electrical conductivity.

In one embodiment, the first dielectric and the second dielectric are insulating dielectrics.

8. The discharge body according to any one of claims 1 to 7, wherein said first medium has a first end adjacent to said second segment and a second end opposite to said first end, an end face of said first end being provided with a creepage preventing structure.

9. The discharge body according to any one of claims 1 to 8, wherein said creepage preventing structure is a recess provided on a first end surface of said first medium, said recess being arranged around said conductor.

10. The discharge body according to any one of claims 1 to 9, wherein said anti-creeping structure is a projection provided on said first end surface, said projection being arranged around said conductor.

Preferably, the conductor is made of metal, and preferably, the metal is low-carbon steel.

11. The discharge according to any of claims 1 to 10, wherein said first medium is a ceramic and/or said second medium is a glaze.

12. The discharge body of claim 9, wherein the depressions are in the shape of any one or more of a funnel, a cylinder, and a circular ring.

13. The discharge body according to any of claims 1 to 12, wherein said conductor comprises a first section, a second section and a third section connected in series,

the first medium is arranged around the surface of the second section, the second medium is arranged around the surface of the first medium, the end surfaces at two ends of the first medium are respectively provided with the anti-creeping structure, or

The first medium is arranged around the surfaces of the first section and the third section respectively, the second medium is arranged around the surface of the first medium, and the anti-creeping structure is arranged on at least the end face, close to the second section, of the first medium.

14. An electric field device, characterized in that the electric field device comprises a first pole and a second pole,

the first pole has a plate-shaped body provided with a plurality of discharge holes,

the discharge body of any of claims 1-13, wherein the dielectric portion of the discharge body extends into the discharge hole and forms a gap with the inner wall of the discharge hole.

Preferably, the discharge hole is a through hole.

15. An electric field arrangement according to claim 14, characterized in that an insulating film is arranged on the inner wall of the discharge opening, with a gap between the outer surface of the second medium and the insulating film.

16. An electric field device according to claim 14 or 15, wherein the gap has a distance in the range of 0.5-5mm, preferably 0.5-1.5 mm.

17. A method for manufacturing a discharge body is characterized by comprising the following steps:

the method comprises the following steps that firstly, a first discharge body is provided with a conductor and ceramic, and a second discharge body is obtained after glaze slurry is coated on the ceramic surface of the first discharge body;

step two, drying the second discharge body to obtain a third discharge body;

step three, firing the third discharge body at a high temperature to obtain a fourth discharge body; and

and step four, cooling the fourth discharge body to obtain a finished product of the dual-medium discharge body.

18. The method of claim 17, further comprising, prior to the first step, the steps of:

the ceramic is disposed on the conductor to obtain a first discharge.

19. The method of making an electric discharge according to claim 18, further comprising the steps of: and processing an anti-creeping structure on the end face of the first discharge body.

Preferably, the anti-creeping structure is a recess arranged on the first end face, and the recess is arranged around the conductor.

Preferably, the anti-creeping structure is a protrusion arranged on the end face of the first end, and the protrusion is arranged around the conductor.

20. The method of claim 18 or 19, wherein the recess is any one of a funnel shape, a cylindrical shape, and a circular shape.

21. The method of manufacturing an electric discharge body according to any of claims 17 to 20, characterized in that:

in the second step, the temperature range for drying the second discharge body is 90-250 ℃, the drying time is 5-10 minutes, and/or

In the third step, the third discharge body is fired at a high temperature of 800-900 ℃ for 4-10 minutes, and/or

In the fourth step, the fourth discharge body is naturally cooled to room temperature in a low-temperature region below 600 ℃.

22. An ozone generator comprising a housing and an electric field device as claimed in any one of claims 14 to 16 mounted within the housing.

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