Plasma generator based on single emission head and electronic equipment

Abstract

The invention relates to the field of plasma generators, and discloses a plasma generator based on a single emission head and electronic equipment, and the plasma generator comprises a power supply input end which is configured to be connected with an external power supply; the resonance trigger circuit is coupled to the power supply input end, and the resonance trigger circuit comprises a bidirectional trigger switch and an energy storage capacitor; a primary winding of the transformer is connected in series with the bidirectional trigger switch and the energy storage capacitor in the resonance trigger circuit to form a primary loop, and the transformer is used for generating resonance under the charging and discharging effects on the energy storage capacitor and outputting a resonance peak through a secondary winding; the transmitting head is coupled to one end of the secondary winding through a coupler, and the resonance peak is used for generating positive and negative ions through the transmitting head; and the isolation device is coupled between the primary winding and the secondary winding of the transformer. According to the invention, positive and negative ions are generated by using a single emission head, the circuit structure is simple, and the problem that double emission heads are difficult to assemble in a traditional scheme is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of plasma generators, and in particular to a plasma generator and electronic equipment based on a single emitter head. Background Art

[0002] Traditional plasma generators use two emitters, one positive and one negative, to output positive ions and negative ions (also known as plasma). However, the two emitter structures have the following defects: there are strict requirements for the installation or assembly of the two emitter heads. For example, if the distance between the two emitter heads is too close, ozone is easily generated; if the distance between the two emitter heads is too far, the effect of generating plasma will be greatly reduced. Summary of the invention

[0003] In view of this, the present application provides a plasma generator and electronic device based on a single emitter head. By adopting a single emitter head to generate positive ions and negative ions in a time-sharing manner, the problem of high difficulty in assembling two emitter heads in traditional plasma generators can be effectively solved.

[0004] In a first aspect, an embodiment of the present application provides a plasma generator based on a single emitter head, comprising:

[0005] A power input terminal, configured to be connected to an external power source;

[0006] A resonance trigger circuit, coupled to the power input terminal, wherein the resonance trigger circuit comprises a bidirectional trigger switch and an energy storage capacitor;

[0007] A transformer, wherein the primary winding of the transformer is connected in series with the bidirectional trigger switch and the energy storage capacitor in the resonant trigger circuit to form a primary loop, and the transformer is used to generate resonance under the charging and discharging action of the energy storage capacitor and output a resonance peak through the secondary winding;

[0008] a transmitter head coupled to one end of the secondary winding via a coupler, wherein the resonance peak is used to generate positive and negative ions via the transmitter head;

[0009] The isolation device is coupled between the primary winding and the secondary winding of the transformer.

[0010] In some embodiments, the transformer includes a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding;

[0011] The first primary winding and the second primary winding are connected in series in the same direction; the first secondary winding and the second secondary winding are connected in series in the same direction;

[0012] Among them, the first primary winding, the second primary winding, the bidirectional trigger switch and the energy storage capacitor of the transformer are arranged in series to form the primary loop.

[0013] In some embodiments, the transformer includes a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding;

[0014] The first primary winding and the second primary winding are arranged in parallel in the same direction; the first secondary winding and the second secondary winding are arranged in series in the same direction;

[0015] Among them, the first primary winding of the transformer, the bidirectional trigger switch and the energy storage capacitor are arranged in series to form a first primary loop; and the second primary winding, the bidirectional trigger switch and the energy storage capacitor are arranged in series to form a second primary loop.

[0016] In some embodiments, the transformer is an extended transformer, and the number of turns of the secondary winding of the extended transformer is greater than a preset number of turns.

[0017] In some embodiments, the resonance trigger circuit includes a conditioning unit coupled between the power input terminal and a connection line of the primary loop.

[0018] In some embodiments, the conditioning unit includes a first conditioning resistor and a second conditioning resistor, and the power input terminal includes a first input terminal and a second input terminal;

[0019] The first input terminal is coupled to a first node of the primary loop through the first conditioning resistor, and the second input terminal is coupled to a second node of the primary loop through the second conditioning resistor.

[0020] In some embodiments, the bidirectional trigger switch or the energy storage capacitor is provided between the first node and the second node of the primary loop.

[0021] In some embodiments, the number of the resonance peaks in one AC cycle is determined according to a time constant calculated based on the resistance values ​​of the first conditioning resistor and the second conditioning resistor, and the capacitance value of the energy storage capacitor.

[0022] In some embodiments, the coupler and the isolation device are both capacitors.

[0023] In some embodiments, the coupler includes two coupling units arranged in cascade, and each of the coupling units is a capacitor.

[0024] In some embodiments, the bidirectional trigger switch uses a bidirectional trigger diode.

[0025] In some embodiments, the transmitter head is made of a carbon fiber or metal-based substrate.

[0026] In some embodiments, the emission head is a metal electrode with a pointed structure.

[0027] In a second aspect, an embodiment of the present application further provides an electronic device, comprising the plasma generator.

[0028] In some embodiments, the electronic device further includes: a gas source, which is used to generate an airflow to separate the positive and negative ions generated by the plasma generator from the target surface.

[0029] The embodiments of the present application have the following advantages:

[0030] The present application proposes a plasma generator based on a single emitter head, including a power input terminal configured to be connected to an external power supply; a resonant trigger circuit coupled to the power input terminal, wherein the resonant trigger circuit includes a bidirectional trigger switch and an energy storage capacitor; a transformer, the primary winding of the transformer is connected in series with the bidirectional trigger switch and the energy storage capacitor in the resonant trigger circuit to form a primary loop, the transformer is used to generate resonance under the charging and discharging action of the energy storage capacitor, and outputs a resonant peak through a secondary winding; a emitter head, coupled to one end of the secondary winding through a coupler, the resonant peak is used to generate positive and negative ions through the emitter head, and an isolation device coupled between the primary winding and the secondary winding of the transformer. The plasma generator of the present application can use a single ion emitter head to generate positive and negative ions at the same time, and the circuit structure is simpler than that of a traditional plasma generator; in addition, especially for the assembly of the emitter head, since a single emitter head is used, it is no longer necessary to strictly control the distance between the two emitters as in the traditional solution, which can reduce the difficulty of manufacturing and production, and improve the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 The structure diagram of the plasma generator according to the embodiment of the present application is shown;

[0033] Figure 2 A structural schematic diagram of a resonant trigger circuit according to an embodiment of the present application is shown;

[0034] Figure 3A-3C Three structural schematic diagrams of transformers according to embodiments of the present application are shown respectively;

[0035] Figure 4 A first structural schematic diagram of a plasma generator according to an embodiment of the present application is shown;

[0036] Figure 5 A second structural schematic diagram of a plasma generator according to an embodiment of the present application is shown;

[0037] Figure 6 A third structural schematic diagram of a plasma generator according to an embodiment of the present application is shown;

[0038] Figure 7 A fourth structural schematic diagram of a plasma generator according to an embodiment of the present application is shown;

[0039] Figure 8 A fifth structural schematic diagram of a plasma generator according to an embodiment of the present application is shown;

[0040] Fig. 9 A sixth structural schematic diagram of a plasma generator according to an embodiment of the present application is shown;

[0041] Fig.10 Shows Figure 4 A schematic diagram of signal flow of an exemplary plasma generator;

[0042] Fig.11 Shows Figure 4 A resonant waveform produced by an example plasma generator;

[0043] Fig.12 A schematic structural diagram of an electronic device according to an embodiment of the present application is shown.

[0044] Description of main component symbols:

[0045] 10-plasma generator; 110-power input terminal; 120-resonance trigger circuit; 130-transformer; 140-coupler; 150-transmitter head; 160-isolation device; 20-electronic equipment; 21-gas source;

[0046] R1-first conditioning resistor; R2-second conditioning resistor; D1-bidirectional trigger diode; C1-energy storage capacitor; C2-first capacitor; C3-second capacitor; C4-third capacitor. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0048] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0049] Hereinafter, the terms "including", "having" and their cognates, which may be used in various embodiments of the present application, are intended only to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0050] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0051] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0052] Considering the problem that the distance between the dual emitters of the traditional plasma generator is difficult to control the assembly space and the operation is difficult, the inventor tried to propose to output plasma through a single emitter. However, since the existing ion circuits of the single emitter are only used to output negative ions, and positive and negative ions cannot be output at the same time, the inventor made a variety of attempts and finally creatively proposed the technical solution of the present application. Specifically, first, the inventor proposed to cancel the use of one emitter in the circuit structure of the traditional plasma generator and reuse the remaining emitter. It tried to add a time-sharing multiplexing switch to the two output ends of the transformer, but because the interval time between the generation of positive and negative ions is usually very short (microsecond level), and various switches currently on the market cannot meet this response speed. Next, in view of the fact that the traditional plasma generator with AC input meets two points, that is, the input end needs to be half-wave rectified, and the output end needs two sets of rectifier filters to obtain positive high voltage and negative high voltage respectively, and then obtain positive ions and negative ions respectively; and the traditional negative ion generator, the main difference from the plasma generator is that the output end only needs one set of rectifier filters to obtain negative ions and output through a single emitter. The inventor proposes whether it is possible to improve on the circuit basis of the traditional negative ion generator, and by trying to remove the rectification and filtering structure (including the output terminal diode and the high-voltage resistant energy storage capacitor, also known as the high-voltage energy storage capacitor) of the output terminal in turn, so that the positive voltage can also be output, the result can not produce positive and negative ions, then try to remove the half-wave rectification structure (i.e. the input terminal diode) of the input terminal so that the AC negative half-wave signal can also be input, the result still can not produce positive and negative ions. So, the inventor analyzes the reasons for not being able to produce positive and negative ions step by step, and finds that the circuit structure of the traditional plasma or negative ion generator mainly adopts a common transformer plus the output terminal is provided with a diode and a high-voltage energy storage capacitor for energy storage and rectification and filtering, so as to ensure the stable and continuous output of plasma or negative ions. If only the high-voltage energy storage capacitor and the diode are cancelled, it may cause the energy output to the transmitter to be insufficient and unable to produce ions. Based on this analysis, the inventor proposes that the voltage outputted by the transformer can be increased to be large enough to ensure that the energy can successfully ionize the air and release positive and negative ions, and maintain the concentration of the positive and negative ions.

[0053] Based on this idea, the inventor continued to analyze the devices in the traditional ion generator circuit. On the premise of eliminating the rectification and filtering at the output end (including diodes and high-voltage energy storage capacitors), he finally proposed to improve the structure of the core device in the circuit - the transformer, so that it can output a higher voltage than the conventional transformer in the traditional plasma generator, and then use the transformer to produce a waveform with a resonant peak at the output end in a simple harmonic oscillation state. When this peak voltage is large enough, this high-voltage resonant peak can be used to generate positive and negative ions on the transmitter head, that is, positive ions are generated at the positive peak moment, and negative ions are generated at the negative peak moment. At the same time, by designing reasonable other device parameters, it can generate multiple high-voltage resonant spikes in one cycle, so that the overall plasma concentration can be guaranteed to meet the demand.

[0054] Therefore, the present application proposes a plasma generator 10 based on a single emitter head, which utilizes a resonant trigger circuit 120 based on short-time pulses and an improved transformer 130 to achieve a single emitter head that outputs both positive and negative ions, while utilizing multiple outputs of short-time resonant spikes to ensure that the overall plasma concentration is equivalent to that in the traditional solution.

[0055] The plasma generator 10 based on a single emitter head of the present application is described below in conjunction with some specific embodiments.

[0056] Figure 1 A structural schematic diagram of a plasma generator 10 based on a single emitter head according to an embodiment of the present application is shown.

[0057] Exemplarily, the plasma generator 10 includes a power input terminal 110, a resonance trigger circuit 120, a transformer 130, a coupler 140, a transmitter head 150 and an isolation device 160, wherein the power input terminal 110 is configured to be connected to an AC power source; the resonance trigger circuit 120 is coupled to the power input terminal 110 and the transformer 130 respectively, the transmitter head 150 is coupled to the secondary winding of the transformer 130 through the coupler 140, and the transmitter head 150 is used to output positive ions and negative ions; the isolation device 160 is coupled between the primary winding and the secondary winding of the transformer 130. Optionally, the value range of the input AC power source can be 100V to 240V, for example, it can be 110V AC, or it can be 220V AC, etc.

[0058] In the present application, the resonance trigger circuit 120 is used to trigger the transformer 130 to generate resonance under the action of an external AC power source. Figure 2As shown, the resonant trigger circuit 120 includes a bidirectional trigger switch D1 and an energy storage capacitor C1, wherein the primary winding of the transformer 130, the bidirectional trigger switch D1 in the resonant trigger circuit 120 and the energy storage capacitor C1 are connected in series to form a primary loop. It can be understood that the primary loop refers to a path on the primary side of the transformer 130 that forms a current closed loop.

[0059] The bidirectional trigger switch D1 is used to realize bidirectional conduction of the AC signal, that is, it can be triggered to conduct in the positive half-wave cycle of the AC, and can also be triggered to conduct in the negative half-wave cycle of the AC. For example, the bidirectional trigger switch D1 can adopt a bidirectional trigger diode, and of course, it can also adopt a structure with bidirectional trigger conduction composed of separate components, which is not limited here.

[0060] In the primary loop, the bidirectional trigger switch D1, the energy storage capacitor C1 and the primary winding are in a series relationship. It should be understood that the resonant trigger circuit 120 of this embodiment does not strictly limit the setting relationship between the bidirectional trigger switch D1 and the energy storage capacitor C1. For example, if the primary winding of the transformer 130 is used as a reference, in one embodiment, the bidirectional trigger switch D1, the energy storage capacitor C1 and the primary winding can be set in series in sequence; or, in another embodiment, the energy storage capacitor C1, the bidirectional trigger switch D1 and the primary winding can be set in series in sequence.

[0061] Among them, in addition to the above-mentioned bidirectional trigger switch D1 and energy storage capacitor C1, the resonant trigger circuit 120 also includes a conditioning unit connected in series with the power input terminal 110 and coupled to the primary loop. The conditioning unit is coupled between the connection line between the power input terminal 110 and the primary loop, and is used to realize the resonant triggering effect of the transformer 130 together with the bidirectional trigger switch D1 and the energy storage capacitor C1.

[0062] like Figure 2 As shown, the power input terminal 110 includes a first input terminal and a second input terminal, and correspondingly, the conditioning unit in the resonant trigger circuit 120 includes a first conditioning resistor R1 and a second conditioning resistor R2, wherein the first input terminal is coupled to the first node S1 of the primary loop through the first conditioning resistor R1, and the second input terminal is coupled to the second node S2 of the primary loop through the second conditioning resistor R2. The above-mentioned bidirectional trigger switch D1 or energy storage capacitor C1 may be provided between the first node S1 and the second node S2.

[0063] It can be understood that by setting a suitable conditioning resistor at the power input terminal 110, on the one hand, it plays an input anti-interference role. Specifically, it can filter out the high-frequency noise in the connected AC power supply to reduce the high-frequency interference on the signal line; on the other hand, the conditioning resistor and the energy storage capacitor C1 will form an RC charging and discharging circuit. Therefore, this application only uses the bidirectional trigger switch D1 combined with the capacitor charging and discharging circuit, and can use intermittent short-time pulses to trigger the resonance of the transformer 130. In addition, the size of the conditioning resistor can also be used to affect the number of discharges and charges of the energy storage capacitor C1, thereby affecting the number of resonances of the transformer 130 in an AC cycle.

[0064] In the present application, the transformer 130 is one of the core components, which is used to generate resonance under the charging and discharging action of the energy storage capacitor C1, and output the resonance peak through the secondary winding of the transformer 130, wherein the resonance peak is used to generate positive ions and negative ions outward through the transmitter head 150.

[0065] It can be understood that the transformer 130 of the present application can boost the input power supply voltage to a higher level before outputting it, and accordingly, the resonance peaks generated by it are also larger, which can better ensure the ionization effect. For example, in some test scenarios, the improved transformer 130 can output a high voltage of more than 10kV, and the positive and negative resonance peaks can reach more than 5000V.

[0066] It is worth noting that, unlike the industrial frequency transformer used in conventional plasma or negative ion generators, the present application is a new type of high-frequency transformer obtained by structurally improving the transformer in the traditional plasma or negative ion generator. On the one hand, since the high-frequency transformer used in the present application can use smaller core materials and windings to achieve a more compact design, compared with industrial frequency transformers of the same power, it is smaller in size, lighter in weight, and easier to integrate; on the other hand, since the high-frequency transformer has a faster dynamic response speed, this is more advantageous for the need for multiple resonant outputs within one AC cycle or a half-wave AC cycle.

[0067] It can be understood that the present application utilizes the characteristics of the transformer 130, that is, the coil and distributed capacitance of the transformer 130 will be in a simple harmonic oscillation state when the corresponding conditions are met, and a simple harmonic oscillation waveform will be generated at the output end. Therefore, this high-voltage resonant peak is used to generate positive and negative ions on the same transmitter head 150 in a time-sharing manner, that is, positive ions are generated at the positive peak moment, and negative ions are generated at the negative peak moment.

[0068] The structure of the transformer 130 of the present application is described below.

[0069] Exemplarily, the transformer 130 can be obtained at least in the following manner:

[0070] The first method is to connect two sets of coil windings in series or in series-parallel. For example, in one embodiment, Figure 3A As shown, the transformer 130 includes a first primary winding L11, a second primary winding L12, a first secondary winding L21 and a second secondary winding L22; wherein the first primary winding L11 and the second primary winding L12 are arranged in series in the same direction; at the same time, the first secondary winding L21 and the second secondary winding L22 are also arranged in series in the same direction.

[0071] The same-direction series connection means that the coils of the two windings are wound in the same direction, so that the current directions of the two coils connected in series are consistent.

[0072] In another embodiment, if Figure 3B As shown, the first primary winding L11 and the second primary winding L12 are arranged in parallel in the same direction. Specifically, the first end of the first primary winding L11 is connected to the first end of the second primary winding L12, and the second end of the first primary winding L11 is connected to the second end of the second primary winding L12; and the first secondary winding L21 and the second secondary winding L22 are arranged in series in the same direction, that is, only the number of turns of the secondary winding is increased to increase the output side voltage.

[0073] Typically, Figure 3A The structure shown is more suitable for AC power supply of about 220V. Figure 3B The structure shown is more suitable for an AC power supply of about 110V, but this is of course not strictly limited here.

[0074] It can be understood that the first primary winding L11 and the first secondary winding L21 are the first group of coil windings used together, and the second primary winding L12 and the second secondary winding L22 are the second group of coil windings used together. In addition, these two groups of coil windings may not share the same coil frame. In other words, the transformer 130 of the present application can be obtained by combining two conventional transformers in accordance with the above two connection methods.

[0075] The second method is to make an extended transformer 130 by using a set of coil windings with extended windings, such as Figure 3C As shown, the number of turns of the secondary winding L2 of the lengthened transformer 130 will be greater than the preset number of turns. Among them, the preset number of turns is usually the number of turns of the coil of the conventional transformer 130 in the traditional plasma or negative ion generator. It can be understood that the number of turns of the secondary winding of the lengthened transformer 130 mainly depends on the voltage of the resonant peak to be output. Generally, the greater the required output voltage, the greater the number of turns of the secondary winding. Generally, the secondary winding needs to be able to withstand a voltage of more than 10 kilovolts. Considering that the ratio of the number of turns of the primary winding to the secondary winding should not be too large, the number of turns of the primary winding L1 can be appropriately increased, for example, it can be equal to the number of turns of the secondary winding L2.

[0076] It can be understood that the above-mentioned manufacturing methods are only some examples and are not the only limitation, as long as the voltage that can increase the output resonance peak is large enough to cause ionization.

[0077] In the present application, the emitter head 150 is used to output both positive ions and negative ions. In other words, positive and negative ions are output through a common emitter head 150. Exemplarily, the emitter head 150 is coupled to one end of the secondary winding of the transformer 130 through the coupler 140, that is, positive and negative ions are output in a time-sharing manner only through one end. It can be understood that at this time, the other end of the secondary winding of the transformer 130 does not need to be connected to the emitter head 150.

[0078] In one embodiment, the emitter head 150 can be made of a metal-based substrate, for example, it can be a metal electrode with a tip structure. The tip design helps to control the direction and density distribution of the ion flow, thereby improving the focusing degree of the ion beam. In addition, the shape of the tip structure is not limited here, and can be set according to actual needs. It can be understood that the emitter head 150 in the present application can be a simple metal discharge needle, and there is no need to design it as a composite structure, and there is no need to release ions by contacting the outside world.

[0079] Optionally, in another embodiment, the transmitter head 150 may also be made of other materials with good conductive properties such as nano-carbon fiber bundles, which is not limited here.

[0080] In the present application, the coupler 140 is located between the secondary winding of the transformer 130 and the transmitter head 150, and is used to couple the resonant peak signal output by the secondary winding to the transmitter head 150 to improve the output effect of positive and negative ions, and effectively control the output current to meet product safety requirements and regulations.

[0081] For example, in one implementation, the coupler 140 includes a capacitor, one end of which is connected to one end of the secondary winding of the transformer 130 , and the other end of which is connected to the transmitter 150 . In this case, the capacitor is also referred to as a coupling capacitor.

[0082] As an optional solution, the coupler 140 may also include two coupling units arranged in cascade, wherein each coupling unit is a capacitor (respectively denoted as a first capacitor and a second capacitor, such as Figure 4-9 In other words, it can be at least two capacitor groups arranged in series. By coupling through multi-stage capacitors, it can be better ensured that the output meets the requirements.

[0083] It is worth noting that, unlike the high-voltage energy storage capacitor C1 at the output end of a traditional plasma or negative ion generator, which is either set in parallel at both ends of the secondary winding or grounded, the coupling capacitor C3 of the present application is set between one end of the secondary winding and the transmitter head 150 to play a coupling role.

[0084] In the present application, an isolation device 160 is further provided between the primary winding and the secondary winding of the transformer 130, which can be used to prevent electromagnetic interference between the primary and secondary windings, and can also prevent the formation of a current loop between the grounding systems of the primary and secondary windings. For example, in one embodiment, the isolation device 160 can be a capacitor (also called an isolation capacitor, such as Figure 4-Figure 9 C2) etc. shown.

[0085] Based on the above-mentioned various structures of the resonant trigger circuit 120 and the transformer 130, the following takes the bidirectional trigger switch D1 as a bidirectional trigger diode, the coupler 140 and the isolation device 160 as capacitors as an example, the coupling methods of the resonant trigger circuit 120 and the transformer 130 in the plasma generator 10 may include the following:

[0086] In a first embodiment, if Figure 4 As shown, the power input terminal 110 is respectively coupled to the first end and the second end of the energy storage capacitor C1 in the resonant trigger circuit 120 through the first conditioning resistor R1 and the second conditioning resistor R2; at the same time, the first end of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130, the second primary winding L12 and the second end of the energy storage capacitor C1 are sequentially coupled to form a primary loop. An isolation capacitor C2 is provided between the primary winding and the secondary winding of the transformer 130, and the first secondary winding L21 and the second secondary winding L22 of the transformer 130 are arranged in series, and one end of the series connection is coupled to the transmitter 150 through two-stage coupling capacitors C3 and C4.

[0087] In a second embodiment, if Figure 5 As shown, the power input terminal 110 is respectively coupled to the first end and the second end of the bidirectional trigger tube D1 in the resonant trigger circuit 120 through the first conditioning resistor R1 and the second conditioning resistor R2; at the same time, the first end of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130, the second primary winding L12 and the second end of the energy storage capacitor C1 are sequentially coupled to form a primary loop. An isolation capacitor C2 is provided between the primary winding and the secondary winding of the transformer 130, and the first secondary winding L21 and the second secondary winding L22 of the transformer 130 are arranged in series, and one end of the series connection is coupled to the transmitter 150 through two-stage coupling capacitors C3 and C4.

[0088] It can be understood that the difference from the first embodiment is that in the second embodiment, the positions of the bidirectional trigger diode D1 and the energy storage capacitor C1 are adjusted, and the connection methods of other components remain unchanged.

[0089] In a third embodiment, if Figure 6 As shown, the power input terminal 110 is respectively coupled to the first end and the second end of the energy storage capacitor C1 in the resonant trigger circuit 120 through the first conditioning resistor R1 and the second conditioning resistor R2, and at the same time, the first end of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130 and the second end of the energy storage capacitor C1 are coupled in sequence to form a first primary loop; and the first end of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130 and the second end of the energy storage capacitor C1 are coupled in sequence to form a second primary loop. An isolation capacitor C2 is provided between the primary winding and the secondary winding of the transformer 130, and the first secondary winding L21 and the second secondary winding L22 of the transformer are arranged in series, and one end of the series connection is coupled to the transmitter 150 through two-stage coupling capacitors C3 and C4.

[0090] It can be understood that the difference from the first embodiment is that in the third embodiment, the connection mode of the two primary windings of the transformer 130 is adjusted from a series connection to a parallel connection, and the connection modes of other components remain unchanged.

[0091] In a fourth embodiment, if Figure 7 As shown, the power input terminal 110 is respectively coupled to the first end and the second end of the bidirectional trigger diode D1 in the resonant trigger circuit 120 through the first conditioning resistor R1 and the second conditioning resistor R2; at the same time, the first end of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130 and the second end of the energy storage capacitor C1 are coupled in sequence to form a first primary loop; and the first end of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130 and the second end of the energy storage capacitor C1 are coupled in sequence to form a second primary loop. An isolation capacitor C2 is provided between the primary winding and the secondary winding of the transformer 130, and the first secondary winding L21 and the second secondary winding L22 of the transformer 130 are arranged in series, and one end of the series connection is coupled to the transmitter 150 through two-stage coupling capacitors C3 and C4.

[0092] It can be understood that the difference from the above-mentioned second embodiment is that in the fourth embodiment, the connection mode of the two primary windings of the transformer 130 is adjusted from a series connection to a parallel setting, and the connection modes of other components remain unchanged.

[0093] In a fifth embodiment, if Figure 8As shown, the power input terminal 110 is respectively coupled to the first end and the second end of the energy storage capacitor C1 in the resonant trigger circuit 120 through the first conditioning resistor R1 and the second conditioning resistor R2; at the same time, the first end of the energy storage capacitor C1, the bidirectional trigger diode D1, the primary winding L1 of the extended transformer 130 and the second end of the energy storage capacitor C1 are sequentially coupled to form a primary loop. An isolation capacitor C2 is provided between the primary winding and the secondary winding of the transformer 130, and one end of the secondary winding L2 of the transformer 130 is coupled to the transmitter 150 through two-stage coupling capacitors C3 and C4.

[0094] It can be understood that the difference from the first embodiment is that in the fifth embodiment, the two primary windings and the two secondary windings of the transformer 130 are adjusted to be wound into an extended coil winding, and the connection method of other components remains unchanged. Optionally, only the number of turns of the secondary winding can be adjusted to increase the output voltage.

[0095] In a sixth embodiment, if Fig. 9 As shown, the power input terminal 110 is coupled to the first end and the second end of the bidirectional trigger diode D1 in the resonant trigger circuit 120 through the first conditioning resistor R1 and the second conditioning resistor R2 respectively; at the same time, the first end of the energy storage capacitor C1, the bidirectional trigger tube D1, the primary winding L1 of the extended transformer 130 and the second end of the energy storage capacitor C1 are coupled in sequence to form a primary loop. An isolation capacitor C2 is provided between the primary winding and the secondary winding of the transformer 130, and one end of the secondary winding L2 of the transformer 130 is coupled to the transmitter 150 through two-stage coupling capacitors C3 and C4.

[0096] It can be understood that the difference from the fifth embodiment is that in the sixth embodiment, the positions of the bidirectional trigger tube D1 and the energy storage capacitor C1 are adjusted, and the connection methods of other components remain unchanged.

[0097] It should be understood that the above-mentioned several specific circuit designs are not intended to be the only limitation. There is no limitation on the number of the first conditioning resistor R1, the second conditioning resistor R2, and the coupling capacitor C3, etc. For example, the first conditioning resistor R1 can be realized by connecting one or more resistors with different resistance values ​​in series and / or in parallel, which mainly depends on the required value.

[0098] by Figure 4 Taking the first embodiment shown as an example, the working process of the plasma generator 10 is described below.

[0099] like Fig.10As shown, when the positive half-wave of AC power is input, the energy storage capacitor C1 is charged in the clockwise direction through the first conditioning resistor R1, the energy storage capacitor C1, and the second conditioning resistor R2. At this time, the voltage on the energy storage capacitor C1 is positive at the top and negative at the bottom. When the voltage on the energy storage capacitor C1 reaches the conduction voltage of the bidirectional trigger tube D1, the bidirectional trigger tube D1 is avalanche-conducted, and the energy storage capacitor C1 is rapidly discharged through the bidirectional trigger tube D1 and the coil of the primary winding of the transformer 130. Since the coil inductance of the primary winding of the transformer 130 is small and the capacity of the energy storage capacitor C1 is not large, the discharge time is very short (about 1us), so the discharge current is very large. According to the principle of electromagnetic induction, the coil of the secondary winding of the transformer 130 will induce a very high peak voltage. When the discharge current of the energy storage capacitor C1 is reduced to a level that is not enough to maintain the conduction state of the bidirectional trigger tube D1, the bidirectional trigger tube D1 is turned off, so the primary discharge loop is in an open state. At this time, the energy storage capacitor C1 starts to charge again. At the same time, the transformer 130 is in a resonant state, and a simple harmonic oscillation waveform is generated at the output end, such as Fig.11 At this time, the resonance peak generates positive and negative ions on the same discharge needle in different time periods, that is, positive ions are generated at the positive peak moment, and negative ions are generated at the negative peak moment.

[0100] When the negative half-wave of AC power is input, the energy storage capacitor C1 is charged in the counterclockwise direction through the second conditioning resistor R2, the energy storage capacitor C1, and the first conditioning resistor R1. At this time, the voltage of the energy storage capacitor C1 is negative at the top and positive at the bottom. Since the bidirectional trigger tube D1 is bidirectionally triggered, the primary winding of the transformer 130 will obtain a reverse discharge current. The whole process is similar to the positive half-wave of AC power. The only difference is that the phase of the output resonant peak waveform is reversed by 180°.

[0101] The number of resonance peaks generated in one AC cycle can be determined based on the resistance of the first conditioning resistor R1 and the second conditioning resistor R2, and the time constant t calculated based on the capacitance of the energy storage capacitor C1. Usually, one AC cycle is 20ms, and the time of one resonance waveform is about 3-5us. Therefore, the values ​​of these components can be selected according to the number of resonances required.

[0102] It can be understood that by adjusting the parameters of the capacitor and the resistor at the input end, multiple resonance peaks can be generated within one AC cycle, that is, the time interval is short, thereby ensuring that the overall plasma concentration meets the requirements.

[0103] It should be noted that the working principles of plasma generators 10 of other structures are similar, and they all use a bidirectional trigger switch combined with a charging and discharging circuit of an energy storage capacitor to generate intermittent short-time pulses, and use the short-time pulses to trigger the transformer 130 to enter a resonant state. As long as the number of resonances in an AC cycle is sufficient, the overall plasma concentration can be guaranteed to meet the requirements.

[0104] The plasma generator 10 of the embodiment of the present application can use the same emission head to output both positive ions and negative ions. It has a simple structure and only requires a transformer, two resistors, a bidirectional trigger tube D1 and several capacitors. In addition, the component cost is lower and the reliability is higher, because the high-voltage energy storage capacitor that affects the output reliability in the traditional circuit is eliminated. In addition, more importantly, the solution of the present application only requires one emission head, which is convenient for assembly and installation, and there is no longer a distance problem between the two emission heads. This can reduce the difficulty of the manufacturing production process and effectively improve the yield rate.

[0105] It is understandable that the plasma generator 10 of the present application can be applied to different fields, for example, including but not limited to, environmental management scenarios, such as wastewater treatment, disinfection and purification of swimming pool water, etc.; medical and health scenarios, such as sterilization and disinfection of wounds, etc.; or home scenarios, such as electric blowers, air purifiers, food preservation, beauty devices, etc., which are not listed here one by one. It is understandable that because the circuit structure of the plasma generator 10 of the present application is simple and the volume can be small, it is particularly suitable for some small or portable electronic devices.

[0106] Fig.12 A structural schematic diagram of an electronic device 20 according to an embodiment of the present application is shown.

[0107] Exemplarily, the electronic device 20 includes a plasma generator 10 of any structure in the above embodiments. For example, the electronic device may include but is not limited to a hair dryer, an air purifier, a food preservation device, a beauty device, etc. In addition, it can also be used for pet product purification, toothbrush disinfection, health care and physiotherapy, etc. Here are just some scene examples.

[0108] As an optional solution, the electronic device 20 further includes a gas source 21, wherein the gas source 21 is used to generate an airflow to separate the positive and negative ions generated by the plasma generator 10 from the target surface. The target surface here refers to the surface of an object or human body to which the ions may adhere.

[0109] Exemplarily, the gas source 21 may include a device for directly outputting gas or generating a pressure difference. The specific implementation method is not limited. For example, it may be a fan device that drives the gas to flow at high speed, so as to carry away the positive ions or negative ions attached to the target surface.

[0110] It can be understood that since there is a time difference between the positive ions and negative ions released by the same emitter head, as long as the generated ions are removed from the target surface by high-speed airflow in a very short time, the neutralization of positive and negative ions can be avoided, thereby obtaining a steady supply of positive and negative ions.

[0111] Among them, the optional items in the above embodiment are also applicable to this embodiment, so they are not described again here.

[0112] In the several embodiments provided in this application, it should be understood that the disclosed device can also be implemented in other ways. The device embodiments described above are only illustrative.

[0113] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0114] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A plasma generator based on a single emitter, characterized in that: include: A power input terminal, configured to be connected to an external power source; A resonance trigger circuit, coupled to the power input terminal, wherein the resonance trigger circuit comprises a bidirectional trigger switch and an energy storage capacitor; A transformer, wherein the primary winding of the transformer is connected in series with the bidirectional trigger switch and the energy storage capacitor in the resonant trigger circuit to form a primary loop, and the transformer is used to generate resonance under the charging and discharging action of the energy storage capacitor and output a resonance peak through a secondary winding; a transmitter head coupled to one end of the secondary winding via a coupler, wherein the resonance peak is used to generate positive and negative ions via the transmitter head; The isolation device is coupled between the primary winding and the secondary winding of the transformer.

2. The plasma generator according to claim 1, characterized in that: The transformer comprises a first primary winding, a second primary winding, a first secondary winding and a second secondary winding; The first primary winding and the second primary winding are connected in series in the same direction; the first secondary winding and the second secondary winding are connected in series in the same direction; Among them, the first primary winding, the second primary winding, the bidirectional trigger switch and the energy storage capacitor of the transformer are arranged in series to form the primary loop.

3. The plasma generator according to claim 1, characterized in that: The transformer comprises a first primary winding, a second primary winding, a first secondary winding and a second secondary winding; The first primary winding and the second primary winding are arranged in parallel in the same direction; the first secondary winding and the second secondary winding are arranged in series in the same direction; Among them, the first primary winding of the transformer, the bidirectional trigger switch and the energy storage capacitor are arranged in series to form a first primary loop; and the second primary winding, the bidirectional trigger switch and the energy storage capacitor are arranged in series to form a second primary loop.

4. The plasma generator according to claim 1, characterized in that: The transformer is an extended transformer, and the number of turns of the secondary winding of the extended transformer is greater than the preset number of turns.

5. The plasma generator according to claim 1, characterized in that: The resonance trigger circuit includes a conditioning unit coupled between the power input terminal and a connection line of the primary loop.

6. The plasma generator according to claim 5, characterized in that: The conditioning unit includes a first conditioning resistor and a second conditioning resistor, and the power input end includes a first input end and a second input end; The first input terminal is coupled to a first node of the primary loop through the first conditioning resistor, and the second input terminal is coupled to a second node of the primary loop through the second conditioning resistor.

7. The plasma generator according to claim 6, characterized in that: The bidirectional trigger switch or the energy storage capacitor is provided between the first node and the second node of the primary loop.

8. The plasma generator according to claim 6, characterized in that: The number of the resonance peaks in one AC cycle is determined according to a time constant calculated based on the resistance values ​​of the first conditioning resistor and the second conditioning resistor, and the capacitance value of the energy storage capacitor.

9. The plasma generator according to claim 1, characterized in that: The coupler and the isolation device are both capacitors.

10. The plasma generator according to claim 1, characterized in that: The coupler comprises two coupling units arranged in cascade, and each of the coupling units is a capacitor.

11. The plasma generator according to claim 1, characterized in that: The bidirectional trigger switch adopts a bidirectional trigger diode.

12. The plasma generator according to claim 1, characterized in that: The transmitter head is made of carbon fiber or metal-based substrate.

13. The plasma generator according to claim 12, characterized in that: The emitter head is a metal electrode with a pointed end structure.

14. An electronic device, characterized in that: include: A plasma generator based on a single emitter head as described in any one of claims 1 to 13.

15. The electronic device according to claim 14, characterized in that: Also includes: A gas source is used to generate a gas flow so that the positive and negative ions generated by the plasma generator are separated from the target surface.

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