CN206894986U - Plasma generator and purifier - Google Patents

Abstract

The utility model provides a plasma generator and a purifier. The plasma generator includes: a working electrode connected to a stabilized power supply for discharging when the output voltage of the stabilized power supply reaches a preset value; The counter electrode is used to form an inhomogeneous electric field with the working electrode; the controller is used to make the counter electrode and the working electrode move relative to each other, so that the working electrode and the counter electrode The electric field changes. This scheme realizes the real-time change of the space electric field under the condition of constant output high voltage, which makes the space charge continuously change and arrange, effectively improves the charging efficiency, makes it easier to generate plasma around the working electrode, and the effect of changing the electric field Under this condition, the molecules/atoms and electrons in the plasma have higher energy and are more likely to react, which increases the molecular reaction rate and promotes the decomposition of gaseous pollutants. At the same time, it can ensure the stability of the discharge and avoid the generation of ozone.

Description

A kind of plasma generator and purifier

technical field

The utility model relates to the field of environmental purification, in particular to a plasma generator and a purifier.

Background technique

Plasma is the fourth state of matter after solid state, liquid state, and gas state. When the applied voltage reaches the discharge voltage of the gas, the gas is broken down to produce a mixture including electrons, various ions, atoms, and free radicals. The principle of plasma technology to treat pollutants is: under the action of an external electric field, a large number of energy-carrying electrons generated by dielectric discharge bombard pollutant molecules, causing them to ionize, dissociate and excite, and then trigger a series of complex physical and chemical processes. The reaction can transform complex macromolecular pollutants into simple small molecular safe substances, or transform toxic and harmful substances into non-toxic, harmless or low-toxic and low-harm substances, so that pollutants can be degraded and removed. Because the average energy of the electrons generated after ionization is 10ev, proper control of the reaction conditions can make chemical reactions that are difficult to achieve or very slow under normal circumstances very fast. As a high-tech with strong potential advantages in the field of environmental pollution treatment, plasma has attracted great attention from relevant scientific circles at home and abroad, and purifiers using plasma technology have emerged as the times require.

The main working principle of the plasma generator is to raise the low voltage to positive high voltage and negative high voltage through the booster circuit, and use positive high voltage and negative high voltage to ionize air (mainly oxygen) to generate a large number of positive ions and negative ions, and the number of negative ions is greater than that of positive number of ions. The positive ions and negative ions produced by the plasma generator at the same time produce a huge energy release at the moment of positive and negative charge neutralization in the air, which leads to the change of the structure of the bacteria around it or the conversion of energy, thus causing the death of the bacteria and realizing the purpose of sterilization and purification. effect. Therefore, the purification effect of the plasma purifier mainly depends on the ionization efficiency of the plasma generator. The ionization of gas in an extremely uneven electric field is an important way to generate indoor corona plasma. In the prior art, there are generally two working modes of the plasma generator as follows:

Option 1: Output high voltage through a DC stabilized power supply, ionize through the inhomogeneity of the electric field distribution, and generate plasma. One advantage of the regulated power supply is that the output voltage is stable and the ripple is less, but because the uneven electric field is stable, the efficiency of molecular collision is not high, and the effect of removing gaseous pollutants is poor;

Scheme 2: Use alternating voltage for ionization. Although this scheme can obtain a periodically changing electric field when the voltage changes, it solves the defect of low molecular collision efficiency caused by the inhomogeneous electric field in the scheme 1. However, due to the voltage Higher, it is difficult to control the stability of the output voltage, and this solution produces more ripples, which will cause discharge instability and generate a large amount of ozone.

Utility model content

Therefore, the technical problem to be solved by the utility model is how to improve the molecular collision efficiency while reducing the ripple of the plasma generator.

In view of this, the first aspect of the embodiment of the present invention provides a plasma generator, including: a working electrode connected to a regulated power supply for discharging when the output voltage of the regulated power supply reaches a preset value The counter electrode is used to form an inhomogeneous electric field with the working electrode; the controller is used to make the counter electrode and the working electrode move relative to each other, so that the working electrode and the counter electrode The electric field between them changes.

Preferably, the working electrode includes a plurality of elongated electrodes, and the plurality of elongated electrodes are arranged in a row to form a working electrode row.

Preferably, the elongated electrode is one or more of a sawtooth electrode, a wire electrode, and a strip electrode provided with a needle array, wherein the sawtooth and/or the needle array face toward the pair electrode.

Preferably, the counter electrode includes a plurality of sub-electrodes arranged opposite to the plurality of elongated electrodes, and the plurality of sub-electrodes are arranged in a row to form a counter electrode row.

Preferably, the sub-electrode is one or more of a plate electrode, a columnar electrode, a grid electrode, and a strip electrode with a curved surface facing the working electrode.

Preferably, the working electrode column and the counter electrode column are arranged parallel to each other.

Preferably, the counter electrode column moves in a direction perpendicular to the working electrode column.

Preferably, the working electrode column and the counter electrode column are vertically arranged.

Preferably, the counter electrode column moves in a direction parallel to the working electrode column.

Preferably, the working electrode row is arranged around the counter electrode row, and the counter electrode row and the working electrode row are relatively rotated.

Preferably, the counter electrode is a cylindrical electrode, the cylindrical electrode is provided with a plurality of through holes, and the working electrode column is arranged around the cylindrical electrode.

Preferably, a catalyst layer is provided on the counter electrode and/or the working electrode.

Preferably, the catalyst is a photocatalyst.

The second aspect of the embodiment of the utility model provides a purifier, including: the first aspect of the embodiment of the utility model provides the plasma generator.

The technical solution of the utility model has the following advantages:

The plasma generator and the purifier provided by the utility model control the relative movement of the working electrode and the counter electrode under the condition that the stabilized power supply supplies the voltage to the plasma generator, so that the The electric field changes in real time. In this way, the space electric field changes in real time under the condition of constant output high voltage, which makes the space charge constantly change and arrange, effectively improves the charging efficiency, and makes it easier to generate plasma around the working electrode. Under the action of the changing electric field, the molecules/atoms and electrons in the plasma have higher energy and are more likely to react; the space charge generated by the charge migration changes the migration route with the changing electric field at all times in the changing electric field, This makes it easier for the charge to collide with the particles moving with the airflow, thereby increasing the molecular reaction rate and promoting the decomposition of gaseous pollutants. At the same time, it can ensure a stable voltage output, ensure the stability of the discharge, and reduce the generation of ripples. ozone.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is a structural representation of the plasma generator of the utility model embodiment;

Fig. 2A is a schematic diagram when the working electrode of the embodiment of the present invention is a wire electrode;

Fig. 2B is a schematic diagram of the parallel arrangement of the working electrode column and the counter electrode column in the embodiment of the present invention;

Fig. 2C is a top view of the relative movement of the working electrode row and the counter electrode row arranged in parallel to each other according to the embodiment of the utility model;

Fig. 2D is another top view of the relative movement when the working electrode row and the counter electrode row are arranged parallel to each other according to the embodiment of the present invention;

3A is a schematic diagram of the vertical arrangement of the working electrode column and the counter electrode column in the embodiment of the present invention;

Fig. 3B is a top view of the relative movement when the working electrode row and the counter electrode row are vertically arranged in the embodiment of the present invention;

Fig. 3C is another top view of the relative movement when the working electrode row and the counter electrode row are arranged perpendicular to each other according to the embodiment of the present invention;

Fig. 4A is a schematic diagram of the arrangement of the working electrode column around the counter electrode according to the embodiment of the present invention;

Fig. 4B is a top view of the relative movement of the working electrode row arranged around the counter electrode according to the embodiment of the present invention;

Fig. 4C is another top view of the relative movement of the working electrode row arranged around the counter electrode according to the embodiment of the present invention;

Fig. 5 is a schematic diagram of the cylindrical electrode of the utility model embodiment;

Fig. 6 is a block diagram of a purifier according to an embodiment of the present invention.

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, or it can be the internal communication of two components, it can be wireless connection, or it can be wired connection. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

Example 1

The present embodiment provides a kind of plasma generator, as shown in Figure 1, comprises: working electrode 1, opposite electrode 2 and controller 3, wherein working electrode 1 is connected with stabilized voltage power supply 4, is used for the output of stabilized voltage power supply 4 Discharge is performed when the voltage reaches a preset value. Here, a DC regulated power supply 4 can be used to provide a high voltage for ionization. The regulated power supply 4 can output a stable high voltage with less ripple, which can ensure the stability of the discharge of the working electrode 1, and can Voltage feedback control is adopted to ensure a stable voltage output when the load changes slightly; the counter electrode 2 is used to form an uneven electric field with the working electrode 1, and the uneven electric field can provide the necessary conditions for ionization; the controller 3 is used to make the opposite The electrode 2 and the working electrode 1 produce relative motion so that the electric field between the working electrode 1 and the counter electrode 2 changes, where the electric field can be a periodic change or an irregular change, depending on actual needs , and adjust the relative motion through the controller 3; in the changing electric field, the molecules/atoms and electrons in the plasma have higher energy and are more likely to react, which in turn can increase the molecular reaction rate and promote the removal of gaseous pollutants. break down.

As a preferred solution, the working electrode 1 includes a plurality of elongated electrodes, and the plurality of elongated electrodes are arranged in a row to form a working electrode row. In practical application scenarios, the working electrode 1 is used for discharge. In order to achieve a better discharge effect, discharge points are generally arranged on the working electrode 1. It is easier to arrange discharge points on the strip-shaped electrode, which can improve the discharge effect. .

As a preferred solution, the elongated electrode is one or more of a sawtooth electrode, a wire electrode and a strip electrode provided with a needle array, wherein the sawtooth and/or needle array face the counter electrode 2 . Specifically, as shown in FIG. 2A , taking a working electrode 1 composed of a plurality of wire electrodes 11 as an example, the wire electrodes 11 themselves are relatively thin, which can meet the discharge requirements, and a needle-like array can also be arranged on the wire electrodes 11. Make the tip of the needle array face the counter electrode 2, so that better discharge effect can be obtained.

As a preferred solution, the counter electrode 2 includes a plurality of sub-electrodes arranged opposite to the plurality of elongated electrodes, and the plurality of sub-electrodes are arranged in a row to form a counter electrode row. That is, the counter electrode 2 can be composed of a plurality of sub-electrodes, and the electric field strengths that can be formed between the plurality of elongated electrodes and the plurality of sub-electrodes are not equal, so that the inhomogeneity of the electric field can be increased, and the plurality of elongated electrodes of the working electrode 1 When relative movement occurs between the strip electrode and multiple sub-electrodes of the counter electrode 2, the frequency of change of the electric field can be increased, thereby promoting the decomposition of pollutants.

As a preferred solution, the sub-electrode is one or more of a plate electrode, a columnar electrode, a grid electrode, and a strip electrode with a curved surface facing the working electrode 1 . For the shape of the sub-electrodes that make up the counter-electrode column, the principle is to avoid or reduce the secondary discharge of the counter-electrode 2, so the sub-electrode can not have a tip on the side facing the working electrode 1, so the sub-electrode can use one or more of the above-mentioned electrodes. Multiple, wherein, when the side of the sub-electrode facing the working electrode 1 is a curved surface, not only can effectively reduce the secondary discharge, but also increase the dust removal area, so the columnar electrode and the strip electrode with a curved surface facing the working electrode 1 ( For example, the shape after splitting the columnar electrode along the cross-sectional diameter) can increase the dust removal area, thereby improving the decontamination effect of the plasma generator. It should be noted that the shape of the sub-electrode of the present invention is not limited to the above-mentioned shapes, as long as the shape of the sub-electrode can realize the technical solution of the present invention, it is applicable to the present invention.

As a preferred solution, the working electrode row and the counter electrode row are arranged parallel to each other, and the counter electrode row can move along a direction perpendicular to the working electrode row. Specifically, as shown in FIG. 2B , taking a working electrode row composed of a plurality of wire electrodes 11 and a counter electrode row composed of a plurality of plate electrodes 21 as an example, the working electrode row and the counter electrode row are arranged in parallel to each other. When relative motion occurs, the direction of motion can be determined according to actual needs, but it must be ensured that the relative motion of the two may cause the electric field between the two to change, as shown in Figure 2C and Figure 2D (the arrow indicates the direction of motion), such as Make the plate electrode 21 move along the direction perpendicular to the wire electrode 11. At this time, the area of strong electric field around the wire electrode 11 moves relatively, and the area of strong electric field always appears between the wire electrode 11 and the counter electrode 2. When the part of the plate electrode 21 connected to R1 moves, the strength of the space electric field also changes on the original basis, the magnitude of the electric field force received by the space charge changes, and the migration speed also changes in real time, thereby improving Charging efficiency. The plasma region changes, and gas chemical reactions are more likely to occur in the boundary region where the movement changes.

As a preferred solution, the working electrode row and the counter electrode row are arranged perpendicular to each other, and the counter electrode row can move along a direction parallel to the working electrode row. Specifically, as shown in FIG. 3A , taking a working electrode row composed of a plurality of filament electrodes 11 and a counter electrode row composed of a plurality of plate electrodes 21 as an example, the working electrode row and the counter electrode row are arranged perpendicular to each other, and the two When relative motion occurs, the direction of motion can be determined according to actual needs. It is also necessary to ensure that the relative motion of the two may cause the electric field between the two to change, as shown in Figure 3B and Figure 3C (the direction of the arrow is the direction of motion). For example, the plate electrode 21 is moved along a direction parallel to the wire electrode 11. At this time, the area of the strong electric field around the wire electrode 11 moves relatively, and the area of the strong electric field always appears between the wire electrode 11 and the counter electrode 2. The plate-shaped electrode 21 is facing the position (as shown by the electric field changes of fixed points #1 and #2 in Figure 3B and Figure 3C), when moving, the strength of the space electric field also changes on the original basis, The size of the electric field force received by the space charge changes, and the migration speed also changes in real time, so that the charging efficiency can be improved. The plasma region changes, and gas chemical reactions are more likely to occur in the boundary region where the movement changes.

As a preferred solution, the working electrode row is arranged around the counter electrode row, and the counter electrode row and the working electrode row are relatively rotated. Specifically, as shown in FIG. 4A , taking a working electrode column composed of a plurality of filament electrodes 11 and a counter electrode column composed of a plurality of columnar electrodes as an example, the working electrode columns are arranged vertically around the counter electrode column, and the two are rotated relative to each other. Relative movement occurs in the way, and the direction of movement can be determined according to actual needs. It is also necessary to ensure that the relative movement of the two may cause the electric field between the two to change, as shown in Figure 4B and Figure 4C. It can be seen that the two relative rotations before and after In contrast, in this process, the area of strong electric field around the wire electrode 11 moves relatively, and the area of strong electric field always appears in the part where the wire electrode 11 is directly opposite to the columnar sub-electrode of the counter electrode 2. When rotating, the space electric field The strength also changes on the original basis, the magnitude of the electric field force received by the space charge changes, and the migration speed also changes in real time, thereby improving the charging efficiency. The plasma region changes, and gas chemical reactions are more likely to occur in the boundary region where the movement changes.

As a preferred solution, the counter electrode 2 is a cylindrical electrode, and a plurality of through holes are arranged on the cylindrical electrode, and the working electrode columns are arranged around the cylindrical electrode. Specifically, as shown in FIG. 5 , the counter electrode 2 is cylindrical, and a plurality of through holes are arranged on the cylindrical electrode 22. The working electrode column is arranged around the cylindrical electrode 22. The working electrode column can still be made of wire Electrode 11, when the relative rotation of the two occurs, the openings and non-openings of the cylindrical electrode 22 are alternately facing the wire electrode 11, and the strong electric field always appears between the wire electrode 11 and the cylindrical electrode. As the part of the electrode 22 facing the opening does not rotate, the strength of the space electric field also changes on the original basis, the magnitude of the electric field force received by the space charge changes, and the migration speed also changes in real time. Thus, charging efficiency can be improved. The plasma region changes, and gas chemical reactions are more likely to occur in the boundary region where the movement changes.

As a preferred solution, a catalyst layer is provided on the counter electrode 2 and/or the working electrode 1 . Relevant catalysts can be arranged on the catalyst layer to promote chemical reactions in the decomposition process of pollutants.

As a preferred solution, the catalyst is a photocatalyst. Specifically, for example, photocatalysts such as titanium dioxide and cerium dioxide can be installed on all the counter electrodes 2 through various methods such as coating and chemical treatment, so as to further promote the plasma chemical reaction, thereby improving the decontamination effect.

The plasma generator provided in this embodiment, under the condition that the voltage stabilized power supply 4 supplies the plasma generator, generates relative motion by controlling the working electrode 1 and the counter electrode 2, so that the The electric field between them changes in real time. In this way, the space electric field changes in real time under the condition of constant output high voltage, which makes the space charge constantly change and arrange, effectively improves the charging efficiency, and makes it easier to generate electricity around the working electrode 1. Plasma, under the action of a changing electric field, the molecules/atoms and electrons in the plasma have higher energy and are more likely to react; the space charge generated by the charge migration changes with the changing electric field at all times in the changing electric field The migration route makes it easier for the charge to collide with the particles moving with the airflow, thereby increasing the molecular reaction rate and promoting the decomposition of gaseous pollutants. At the same time, it can ensure stable voltage output, ensure the stability of the discharge, and reduce ripples. thereby reducing ozone production.

Example 2

This embodiment provides a purifier 60 , as shown in FIG. 6 , including: the plasma generator in Embodiment 1, so it has all the beneficial effects of the plasma generator in Embodiment 1.

The purifier 60 provided in this embodiment, under the condition that the stabilized power supply provides voltage to the plasma generator, generates relative motion by controlling the working electrode and the counter electrode, so that the electric field distributed between the working electrode and the counter electrode can be generated in real time In this way, the real-time change of the space electric field is realized under the condition of constant output high voltage, so that the space charge is continuously changed and arranged, which effectively improves the charging efficiency and makes it easier to generate plasma around the working electrode, while changing the electric field Under the action of the plasma, the molecules/atoms and electrons in the plasma have higher energy and are more likely to react; in the changing electric field, the space charge generated by the charge migration changes the migration route with the changing electric field at all times, thus making the charge more It is easy to collide with particles moving with the airflow, thereby increasing the molecular reaction rate, promoting the decomposition of gaseous pollutants, and improving the purification effect. At the same time, it can ensure stable voltage output, ensure the stability of discharge, and reduce ripples, thereby reducing Ozone is produced.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (14)

1. A kind of 1. plasma generator, it is characterised in that including：

   Working electrode, voltage-stabilized power supply is connected, for being discharged when the output voltage of the voltage-stabilized power supply reaches preset value；

   To electrode, for forming uneven electric field between the working electrode；

   Controller, for make it is described relative motion is produced to electrode and the working electrode so that the working electrode with it is described Electric field between electrode is changed.
2. 2. plasma generator according to claim 1, it is characterised in that the working electrode includes multiple strips Electrode, the multiple strip electrode arrange to form working electrode row in column.
3. 3. plasma generator according to claim 2, it is characterised in that the strip electrode is zigzag electricity Pole, wire electrode and one or more of strip shaped electric poles of needle-like array are provided with, wherein the sawtooth and/or the needle-like Array is towards described to electrode.
4. 4. plasma generator according to claim 2, it is characterised in that described to include and the multiple length to electrode Strip shaped electric poles multiple sub-electrodes positioned opposite, the multiple sub-electrode arrange to be formed to electrodes series in column.
5. 5. plasma generator according to claim 4, it is characterised in that the sub-electrode is plate electrode, column Electrode, grid electrode and the one side towards the working electrode are one or more of strip shaped electric poles of curved surface.
6. 6. plasma generator according to claim 4, it is characterised in that working electrode row with it is described to electrode Row are arranged parallel to.
7. 7. plasma generator according to claim 6, it is characterised in that it is described to electrodes series along perpendicular to the work Make the direction motion of electrodes series.
8. 8. plasma generator according to claim 4, it is characterised in that working electrode row with it is described to electrode Row are mutually perpendicular to arrange.
9. 9. plasma generator according to claim 8, it is characterised in that it is described to electrodes series along parallel to the work Make the direction motion of electrodes series.
10. 10. plasma generator according to claim 4, it is characterised in that the working electrode row are around described right Electrodes series are arranged, described that electrodes series and working electrode row are relatively rotated.
11. 11. plasma generator according to claim 2, it is characterised in that described is drum electrode to electrode, institute State and multiple through holes are provided with drum electrode, the working electrode row are arranged around the drum electrode.
12. 12. plasma generator according to claim 1, it is characterised in that described electric to electrode and/or the work Catalyst layer is provided with extremely.
13. 13. plasma generator according to claim 12, it is characterised in that the catalyst is photochemical catalyst.
14. A kind of 14. clarifier, it is characterised in that including：Such as the plasma generator any one of claim 1-13.