CN218499333U - Plasma heating structure and plasma atomizing device - Google Patents

Abstract

The application relates to a plasma heating structure and a plasma atomization device, wherein the plasma heating structure comprises at least one electrode pair and an arc striking piece, the arc striking piece is configured to be in an arc striking state with a orthographic projection between two electrodes of the electrode pair, so that a breakdown conduction distance and a working conduction distance are formed between the two electrodes of the corresponding electrode pair, and the breakdown conduction distance is smaller than the working conduction distance. Due to the arrangement of the arc striking piece, the breakdown conduction distance between the two electrodes of the electrode pair is smaller than the working conduction distance, and the smaller breakdown conduction distance can be kept during arc striking, so that the initial breakdown voltage can be greatly reduced, the size of a power supply is reduced, the energy consumption is reduced, and the heating efficiency of the plasma heating structure is improved.

Description

Plasma heating structure and plasma atomizing device

Technical Field

The application relates to the technical field of electronic atomization, in particular to a plasma heating structure and a plasma atomization device.

Background

The plasma heating atomization device generally utilizes working gas to ionize to form plasma, and free electrons and ions in the plasma convert electric field energy into self kinetic energy under the action of an electric field and finally convert the electric field energy into plasma internal energy to perform electric heating.

According to the voltammetric characteristics of gas discharge, before the gas in the discharge gap is ionized to form plasma, a strong electric field needs to be applied to the discharge gap to convert the neutral gas into plasma. Once the plasma is generated, the electric field strength required to sustain heating is significantly reduced. The former requires that the power supply output must provide a high open circuit voltage, while the latter requires that the output voltage at which the power supply maintains heating be significantly lower (by a factor of more than 10) than the open circuit voltage. The two working conditions with large difference can cause the power supply to have larger volume and lower heating efficiency.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a plasma heating structure and a plasma atomizing device that can reduce the power supply volume and improve the heating efficiency for the existing plasma heating atomizing device.

In a first aspect, the present application provides a plasma heating structure, including at least one electrode pair and an arc ignition component, where the arc ignition component is configured to include an arc ignition state having an orthographic projection between two electrodes of the electrode pair, so that a breakdown conducting distance and a working conducting distance are provided between the two electrodes of the corresponding electrode pair, and the breakdown conducting distance is smaller than the working conducting distance.

In one embodiment, at least one of the two electrodes of the electrode pair forms an arc ignition gap with the arc ignition member in an arc ignition state.

In one embodiment, the arc ignition member and the electrode pair can be close to or remote from each other to have an arc ignition state.

In one embodiment, the arc ignition member and the electrode pair are relatively translatable therebetween to have an arc ignition state.

In one embodiment, the arc striking piece and the electrode pair can rotate relatively to each other so as to have an arc striking state.

In one embodiment, the electrode pair is fixed and the arc ignition members are relatively movable to move toward and away from each other.

In one embodiment, when the arc ignition piece is in an arc ignition state, the arc ignition piece can enable a breakdown conduction distance to be kept between two electrodes of the electrode pair;

the arc striking piece is positioned on one side of the electrode pair along the first direction, and the distance between the arc striking piece and the electrode pair along the first direction is not more than 4 mm; and/or

The arc striking piece faces the orthographic projection of the electrode pair, and the distance between the arc striking piece and at least one of two electrodes of the electrode pair is not less than 0.5 mm and not more than 3 mm.

In one embodiment, the centre line of the arc ignition member in the arc ignition state coincides with the centre point of the connecting line between the two electrodes of the electrode pair.

In one embodiment, the arc ignition member is a conductor arc ignition member or a semiconductor arc ignition member.

In one embodiment, the arc ignition member is one of a tungsten alloy arc ignition member, a carbon fiber arc ignition member, a copper alloy arc ignition member, a zirconium alloy arc ignition member, and a graphite arc ignition member.

In one embodiment, the arc striking piece comprises a first arc striking part and a second arc striking part, the extension direction of the first arc striking part is parallel to the first direction, one end of the second arc striking part is connected with the first arc striking part, and an included angle is formed between the second arc striking part and the first arc striking part;

wherein the first direction is parallel to a line direction between two electrodes of the electrode pair.

In one embodiment, the plasma heating structure further comprises a heating element, and the electrode pair is arranged close to the heating element to heat the heating element when the electrode pair has the working conduction distance.

In one embodiment, the plasma heating structure further comprises a heat insulation part, the heat generation part is arranged on the heat insulation part, a guide part is arranged on the heat insulation part, and the guide part is matched with the arc striking part to guide the arc striking part to move relative to the electrode pair.

In one embodiment, at least one of the two electrodes of the arc ignition member and the electrode pair is movable by one of a mechanical switch, an electromagnetic member, or an electrical drive member.

In a second aspect, the present application also provides a plasma atomization device, which includes the plasma heating structure in any of the above embodiments.

Above-mentioned plasma heating structure and plasma atomizing device for owing to the setting of striking piece for the breakdown conduction distance that has between two electrodes of electrode pair is less than work conduction distance, can keep less breakdown conduction distance when the arcing, so can reduce initial breakdown voltage by a wide margin, thereby reduces the power supply volume, and reduces the energy consumption, and then improves plasma heating structure's the efficiency of generating heat.

And the initial breakdown voltage is greatly reduced, so the discharge insulation requirement of the plasma heating structure can be reduced, and the insulation structure can be simplified or miniaturized.

Drawings

FIG. 1 is a schematic diagram of a plasma heating structure according to an embodiment of the present application;

FIG. 2 is a schematic diagram showing a cross-sectional structure of the plasma heating structure shown in FIG. 1 in which the paired electrodes have a breakdown conducting distance;

FIG. 3 is a schematic cross-sectional view of the plasma heating structure of FIG. 1 with the paired electrodes at the working conducting distance;

fig. 4 is a schematic cross-sectional view of the plasma heating structure shown in fig. 1, in which the paired electrodes have an operating conducting distance.

Reference numerals:

a plasma heating structure 100;

an electrode pair 10;

an electrode 11;

an arc ignition body 20;

a first arc ignition portion 21 and a second arc ignition portion 22;

a heat generating member 30;

a heat generating cavity 31;

a heat insulating member 40;

a guide portion 41;

a centerline OO1;

a center point O1;

line AA.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The accompanying drawings are not 1:1, and the relative sizes of the various elements in the drawings are drawn for illustration only and not necessarily to true scale.

Fig. 1 is a schematic structural diagram of a plasma heating structure in an embodiment of the present application, and fig. 2 is a schematic cross-sectional structural diagram of the plasma heating structure shown in fig. 1, in which pairs of electrodes have a breakdown conducting distance; fig. 3 is a schematic cross-sectional view of the plasma heating structure shown in fig. 1, in which the paired electrodes have an operating conducting distance. For the purpose of illustration, the drawings show only the structures associated with the embodiments of the application.

Referring to the drawings, an embodiment of the present application provides a plasma heating structure 100, including at least one electrode pair 10 and an arc ignition device 20, wherein the arc ignition device 20 is configured to include an arc ignition state having an orthographic projection between two electrodes 11 of the electrode pair 10, so as to have a breakdown conducting distance and a working conducting distance between the two electrodes of the electrode pair 10, and the breakdown conducting distance is smaller than the working conducting distance.

It will be appreciated that the electrode pair 10 has two electrodes 11, one positive and one negative.

The arc ignition member 20 refers to a component having a function of cooperating with the electrode pair 10 to ignite an arc, and specifically, the arc ignition member 20 may be a conductor or a semiconductor.

Preferably, the arc ignition member 20 is one of a tungsten alloy arc ignition member, a carbon fiber arc ignition member, a copper alloy arc ignition member, a zirconium alloy arc ignition member, and a graphite arc ignition member.

The orthographic projection of the ignition elements 20 refers to the projection of the ignition elements 20 towards them in a direction perpendicular to the electrode pairs 10. Specifically, when the two electrodes 11 of the electrode pair 10 are located in the same plane, the arc-striking member 20 may form an orthographic projection toward the projection of the corresponding electrode pair 10 along a direction perpendicular to the plane, or may connect the ends of the electrode pair 10 facing each other to form a line, and the arc-striking member 20 may form an orthographic projection toward the projection of the electrode pair 10 along a direction perpendicular to the line.

The electrode pair 10 is configured to have a breakdown conducting distance, which may refer to a breakdown conducting distance formed by only configuring the electrode pair 10 itself, or a breakdown conducting distance formed by configuring at least one of the two electrodes 11 of the electrode pair 10 together with the arc ignition element 20, and is not limited herein. Likewise, the electrode pair 10 is configured to have an operating conducting distance, which may refer to an operating conducting distance configured by the electrode pair 10 itself, or an operating conducting distance configured by the electrode pair 10 and the arc ignition element 20 together, and is not limited herein. It is to be noted, however, that at least one of the breakdown conduction distance and the working conduction distance is formed by a configuration comprising the arc ignition member 20.

Specifically, in the heating process of the plasma heating structure 100, firstly, a breakdown voltage should be applied to the electrode pair 10 to generate an initial arc (arcing), that is, a strong electric field is applied to the discharge gap, the breakdown conduction distance refers to a distance where a breakdown generates a discharge during arcing, and after the arcing succeeds, that is, after a plasma is generated, the arc can reach a predetermined arc heating length to continuously maintain the discharge heating, so the working conduction distance refers to a distance where the arc can continuously maintain the discharge heating after arcing.

It will be appreciated that the breakdown occurs due to the application of a breakdown voltage across the electrode pair 10, and therefore one end of the electrode pair 10 should be connected to a power supply for providing the electrode pair 10 with a breakdown voltage. And, after the breakdown is completed, the power supply should also continue to provide the electrode pair 10 with operating voltage to achieve the heating function of the arc.

Due to the arrangement of the arc striking piece 20, the breakdown conduction distance between the two electrodes 11 of the electrode pair 10 is smaller than the working conduction distance, and a smaller breakdown conduction distance can be kept during arcing, so that the initial breakdown voltage can be greatly reduced, the size of a power supply is reduced, the energy consumption is reduced, and the heating efficiency of the plasma heating structure 100 is improved.

And since the initial breakdown voltage is greatly reduced, the discharge insulation requirement of the plasma heating structure 100 can be reduced, and the insulation structure can be simplified or miniaturized.

In an embodiment of the present application, at least one of the two electrodes 11 of the electrode pair 10 has an ignition gap with the ignition element 20 in the ignition state.

Due to the presence of the ignition gap, when the electrode pair 10 is loaded with an initial breakdown voltage, an initial arc is generated at each electrode 11 and at the end of the electrode 11 having the ignition gap between the ignition element 20 and this electrode 11. After arcing, the arc initiation gap may be increased, thereby enabling the arc to be elongated for heating purposes.

Preferably, each electrode 11 of the pair of electrodes 10 forms an ignition gap with the ignition element 20 in the ignition state. As such, an initial arc is generated at both ends of the electrode pair 10 and the arc striking member 20 having the arc striking gap between the electrode pair 10.

In some embodiments, the arc ignition member 20 and the electrode pair 10 can be close to or far from each other to have an arc ignition state.

Specifically, it is possible to have a breakdown conduction distance when the ignition piece 20 and the electrode pair 10 are close to each other, and to have a working conduction distance when the ignition piece 20 and the electrode pair 10 are far from each other.

By arranging the arc striking member 20 and the electrode pair 10 to move close to and away from each other, the breakdown conduction distance and the working conduction distance are achieved in a simple manner and are convenient to control.

In practical application, when the arc striking part 20 and the electrode pair 10 are close to each other, a breakdown voltage is applied to the electrode pair 10 to break down between the arc striking part 20 and the electrode pair 10 to generate an initial arc, after the arc striking is successful, the arc striking part 20 and the electrode pair 10 are separated from each other, and the distance between the arc striking part 20 and the electrode pair 10 is increased to a predetermined length, so that the arc is elongated, and the arc heating in a larger area is realized.

Further, the arc ignition member 20 is fixed to one of the two electrodes 11 of the electrode pair 10, and the other is capable of relative movement so as to be brought close to or away from each other.

The arc ignition member 20 is fixed to one of the two electrodes 11 of the electrode pair 10, and the other electrode is movable relative to the other electrode, so that the structure for driving the movement can be simplified.

Preferably, the electrode pair 10 is fixed and the arc ignition members 20 are relatively movable to be brought close to or away from each other.

Compared with the movement of the electrode pair 10 and the relative movement of the arc striking piece 20, on one hand, the volume of the arc striking piece 20 can be larger, which is beneficial to the movement stability, and in addition, the working conduction distance is relatively fixed due to the fixation of the electrode pair 10, so that the working stability is improved.

In other embodiments, both the arc ignition member 20 and the electrode pair 10 are movable relative to each other to move closer to or away from each other.

In particular, the arc ignition element 20 and at least one of the two electrodes 11 of the electrode pair 10 can be moved under the action of a mechanical switch, an electromagnetic element or an electrical drive element.

The mechanical switch may be a toggle switch or a button, the electromagnetic element may be an electromagnet, and the electric driving element may be a motor, without limitation.

The mechanical switch, the electromagnetic element or the electric driving element has a simple structure, and the acting force provided to the arc striking element 20 and the electrode pair 10 is reliable.

In addition to the case where the arc ignition member 20 and the electrode pair 10 can be close to or distant from each other to have the arc ignition state, in other embodiments, the arc ignition member 20 can also have the arc ignition state in a state where the position relative to the electrode pair 10 is fixed, which is not limited herein. In this aspect, the arc ignition member 20 may be a semiconductor structure disposed between the pair of electrodes 10.

As shown in fig. 2 and 3, in an embodiment of the present application, the arc ignition member 20 and the electrode pair 10 are relatively translatable therebetween to have an arc ignition state.

The translation mode is simple, so the driving movement mode is simple, the movement is stable, and the reliability of arc striking is improved.

In practical application, when arc breakdown occurs, the arc striking part 20 can move in a direction away from the electrode pair 10, and since a large amount of free electrons are generated in the discharge space and the temperature of the discharge space is increased, the arc can be easily elongated and maintained, the arc spot on the arc striking part 20 drifts towards the middle, and after the arc striking part is away from the electrode pair to a certain distance, long arc continuous heating can be realized between the arc striking part 20 and the electrode pair 10.

Of course, after the arc striking part is far away from the arc striking part to a certain distance, the electric field intensity between the two electrodes 11 of the electrode pair 10 may also be larger than the electric field intensity between one electrode 11 to the arc striking part 20 and then to the other electrode 11, and the arcs at the two ends of the two electrodes 11 of the electrode pair 10 are directly connected to discharge and separated from the arc striking part 20, so that the long-arc continuous heating is realized between the two electrodes 11 of the electrode pair 10.

Specifically, the arc ignition member 20 is located at one side of the electrode pair 10 in a first direction, and the arc ignition member 20 and the electrode pair 10 can relatively translate in the first direction and can also relatively translate in a second direction perpendicular to the first direction.

In other embodiments of the present application, as shown in fig. 2 and 4, the arc ignition member 20 and the electrode pair 10 can be relatively rotated to have an arc ignition state.

The rotating mode is simple, so that the driving moving mode is simple, the movement is stable, and the arc striking reliability is improved.

In practical application, as the arc breakdown occurs, the arc striking member 20 and the electrode pair 10 can rotate relatively to each other to guide the arc to elongate and shift the arc spot toward the middle until the two ends of the electrode pair 10 are connected by the arc, thereby realizing long arc heating.

Referring to fig. 2, in some embodiments, when the arc striking member 20 is in an arc striking state that enables a breakdown conducting distance between two electrodes 11 of the electrode pair 10, the arc striking member 20 is located on one side of the electrode pair 10 along the first direction, and is spaced from the electrode pair 10 along the first direction by no more than 4 mm.

In some embodiments, when the arc ignition member 20 is in an arc ignition state capable of making the electrode pair 10 have a breakdown conducting distance, the forward projection of the arc ignition member 20 toward the electrode pair 10 is spaced from at least one of the two electrodes 11 of the electrode pair 10 by not less than 0.5 mm and not more than 3 mm.

Referring to fig. 3, in some embodiments, a center line OO1 of the arc striking member 20 in the arc striking state coincides with a center point O1 of a connecting line AA between two electrodes 11 of the electrode pair 10.

Thus, by setting the center line OO1 of the arc striking part 20 to coincide with the center point O1 of the connection line AA between the two electrodes 11 of the electrode pair 10, when arc striking gaps are formed between the two electrodes 11 of the electrode pair 10 and the arc striking part 20 in an arc striking state, arc breakdowns of the arc striking gaps at two positions can be consistent, and further, the initial breakdown voltage is stable.

In some embodiments, the arc striking member 20 includes a first arc striking portion 21 and a second arc striking portion 22, the first arc striking portion 21 extends in a direction parallel to the first direction, one end of the second arc striking portion 22 is connected to the first arc striking portion 21, and an included angle is formed between the second arc striking portion 22 and the first arc striking portion 21. Wherein the first direction is parallel to the direction of the line AA between the two electrodes 11 of the electrode pair 10.

Since the extending direction of the first arc striking portion 22 is parallel to the direction of the connecting line AA between the two electrodes 11 of the electrode pair 10, when arc striking gaps are formed between the two electrodes 11 of the electrode pair 10 and the arc striking member 20 in the arc striking state, the arc striking gaps at the two positions can be equal. And the second arc ignition part 22 can conveniently drive the first arc ignition part 22 to move.

Referring to fig. 1 and 2, in some embodiments, the plasma heating structure 100 further includes a heat generating member 30, and the electrode pair 10 is disposed adjacent to the heat generating member 30 to heat the heat generating member 30 when having a working conducting distance.

By heating the heat generating member 30 to indirectly heat the aerosol-generating substrate in contact with the heat generating member 30, the aerosol-generating substrate is atomised to produce an aerosol.

In particular, the heat generating member 30 may have a heat generating cavity 31 for receiving the aerosol-generating substrate, and in other embodiments, the heat generating member 30 may also extend into a receiving chamber for receiving the aerosol-generating substrate, thereby indirectly heating the aerosol-generating substrate via the heat generating member 30.

Specifically, the heat generating member 30 may be made of an insulating material such as quartz, ceramic, or the like.

Further, the plasma heating structure 100 further includes a heat insulating member 40, the heat generating member 30 is disposed on the heat insulating member 40, the heat insulating member 40 has a guiding portion 41, and the guiding portion 41 cooperates with the arc striking member 20 to guide the arc striking member 20 to move relative to the electrode pair 10.

The guide part 41 is arranged on the heat insulation part 40 to guide the arc striking part 20 to move, so that the movement stability of the arc striking part 20 can be improved, and the arc striking effect is improved.

Specifically, the guide portion 41 includes a guide hole opened in the heat insulator 40, and may be a guide rib, a guide groove, or the like in another embodiment, which is not limited herein.

In the embodiment of the present application, after the breakdown conducting distance is provided between the two electrodes 11 of the electrode pair 10 and the arc striking is successful, the arc striking member 20 and the electrode pair 10 can move away from each other to increase the distance therebetween until the working conducting distance is provided.

In the embodiment of the present application, after the arc is extinguished, the arc striking component 20 and the electrode pair 10 can move close to each other, so as to restore the breakdown conducting distance between the two electrodes 11 of the electrode pair 10, and wait for the next arc striking ignition.

Based on the same inventive concept, the present application also provides a plasma atomization device, which comprises the plasma heating structure 100 in any of the above embodiments.

Specifically, the plasma atomization device further comprises a suction nozzle and a power supply.

In some embodiments, the power supply includes a battery, a control circuit, and a booster, both of which are communicatively coupled to the control circuit, the battery being electrically coupled to the booster. The booster is supplied with modulated power by the control circuit, which boosts the voltage to the operating voltage required by the arc to supply the electrode pair 10.

The plasma heating structure 100 and the plasma atomizing device provided by the embodiment of the application have the following beneficial effects:

due to the arrangement of the arc striking piece 20, the breakdown conduction distance between the two electrodes 11 of the electrode pair 10 is smaller than the working conduction distance, and a smaller breakdown conduction distance can be kept during arcing, so that the initial breakdown voltage can be greatly reduced, the size of a power supply is reduced, the energy consumption is reduced, and the heating efficiency of the plasma heating structure 100 is improved.

And since the initial breakdown voltage is greatly reduced, the discharge insulation requirement of the plasma heating structure 100 can be reduced, and the insulation structure can be simplified or miniaturized.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (15)

1. A plasma heating structure comprising at least one electrode pair and an arc ignition member, wherein the arc ignition member is configured to have an arc ignition state with an orthographic projection between two electrodes of the electrode pair, so that a breakdown conducting distance and an operating conducting distance are provided between the two electrodes of the electrode pair, and the breakdown conducting distance is smaller than the operating conducting distance.

2. A plasma heating structure according to claim 1, characterized in that at least one of the two electrodes of the electrode pair forms an arc ignition gap with the arc ignition member in the arc ignition state.

3. A plasma heating structure according to claim 1 or 2, wherein the arc ignition member and the electrode pair can be close to or away from each other to have the arc ignition state.

4. A plasma heating structure according to claim 3, wherein the arc ignition member and the electrode pair are relatively translatable therebetween to have the arc ignition state.

5. A plasma heating structure according to claim 3, wherein the arc ignition member and the electrode pair are relatively rotatable to have the arc ignition state.

6. A plasma heating structure according to claim 4 or 5, characterized in that the electrode pair is fixed and the arc ignition pieces are relatively movable to be close to or away from each other.

7. A plasma heating structure according to claim 3, wherein when the arc ignition member is in the arc ignition state capable of having a breakdown conducting distance between both of the electrodes of the electrode pair;

the arc striking piece is positioned on one side of the electrode pair along a first direction, and the distance between the arc striking piece and the electrode pair along the first direction is not more than 4 mm; and/or

An orthographic projection of the arc ignition piece towards the electrode pair is spaced from at least one of the two electrodes of the electrode pair by not less than 0.5 mm and not more than 3 mm.

8. A plasma heating structure according to claim 1, characterized in that the center line of the arc ignition piece in the arc ignition state coincides with the center point of the connecting line between the two electrodes of the electrode pair.

9. A plasma heating structure according to claim 1, characterized in that the arc ignition member is a conductor arc ignition member or a semiconductor arc ignition member.

10. A plasma heating structure according to claim 1, wherein the arc ignition member is one of a tungsten alloy arc ignition member, a carbon fiber arc ignition member, a copper alloy arc ignition member, a zirconium alloy arc ignition member, and a graphite arc ignition member.

11. A plasma heating structure according to claim 1, wherein the arc ignition member comprises a first arc ignition portion and a second arc ignition portion, the extending direction of the first arc ignition portion is parallel to the first direction, one end of the second arc ignition portion is connected with the first arc ignition portion, and an included angle is formed between the second arc ignition portion and the first arc ignition portion;

wherein the first direction is parallel to a direction of a connection line between two electrodes of the electrode pair.

12. A plasma heating structure according to claim 3, further comprising a heat generating member, wherein the electrode pair is disposed adjacent to the heat generating member to heat the heat generating member when having the working conduction distance.

13. A plasma heating structure according to claim 12, further comprising a heat insulating member, wherein the heat generating member is disposed on the heat insulating member, and the heat insulating member has a guiding portion thereon, and the guiding portion is matched with the arc striking member to guide the arc striking member to move relative to the electrode pair.

14. A plasma heating structure according to claim 3, wherein at least one of the two electrodes of the pair of ignition and electrode is movable under the action of one of a mechanical switch, an electromagnetic element or an electrical drive element.

15. A plasma atomisation device comprising a plasma heating structure as claimed in any one of claims 1 to 14.

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