A plasma generator and electronic equipment based on a single emitter

Abstract

The present application relates to the field of plasma generators and discloses a plasma generator and electronic device based on a single emitter head. The plasma generator includes: a power input terminal configured to receive an external power supply; a resonant trigger circuit coupled to the power input terminal, the resonant trigger circuit including a bidirectional trigger switch and an energy storage capacitor; a transformer, the primary winding of the transformer being 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 being used to generate resonance under the action of charging and discharging the energy storage capacitor and outputting a resonant peak through a secondary winding; a emitter head coupled to one end of the secondary winding via a coupler, the resonant peak being used to generate positive and negative ions through the emitter head; and an isolation device coupled between the primary and secondary windings of the transformer. The present application realizes the generation of positive and negative ions using a single emitter head, has a simple circuit structure, and effectively solves the problem of difficult assembly of dual emitters in traditional solutions.

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 emit positive and negative ions (also known as plasma). However, this dual-emitter structure has drawbacks, including strict requirements for the spacing between the two emitters during installation or assembly. For example, if the two emitters are too close, ozone is easily generated; if the two emitters are too far apart, the plasma generation effect is greatly reduced. Summary of the Invention

[0003] In view of this, the present application provides a plasma generator and electronic equipment 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 is configured to connect to an external power source;

[0006] 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;

[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, the transformer being configured to generate resonance under the charging and discharging effects 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] An 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] The first primary winding, the second primary winding, the bidirectional trigger switch and the energy storage capacitor of the transformer are connected 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 connected in parallel in the same direction; the first secondary winding and the second secondary winding are connected in series in the same direction;

[0015] In which, 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 resonant 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 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 tip 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, wherein the gas source is used to generate an airflow so that the positive and negative ions generated by the plasma generator are separated 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, comprising 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, 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, the transformer is used to generate resonance under the charging and discharging action of the energy storage capacitor, and output a resonant peak through a secondary winding; an emitter head coupled to one end of the secondary winding through a coupler, the resonant peak being 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 simultaneously generate positive and negative ions using a single ion emitter head, and has a simpler circuit structure than traditional plasma generators. 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 emitter heads as in traditional solutions, which can reduce the difficulty of manufacturing 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 following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 shows an architectural diagram of a plasma generator according to an embodiment of the present application;

[0033] Figure 2 A schematic structural 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 the 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 the plasma generator according to an embodiment of the present application is shown;

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

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

[0042] Figure 11 Shown Figure 4 Resonant waveforms produced by an example plasma generator;

[0043] Figure 12 A structural schematic 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 the embodiments.

[0048] The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different 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 claimed application, but rather merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within 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 the possibility of adding 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 used herein (including technical and scientific terms) have the same meaning as commonly 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 meaning as in the context of the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning unless clearly defined in the various embodiments of the present application.

[0052] Considering the problem that the distance between the dual emitters in the traditional plasma generator is difficult to control the assembly space and the operation is difficult, the inventors have tried to propose to output plasma through a single emitter head. However, since the ion circuits of the existing single emitter heads are only used to output negative ions and cannot output positive and negative ions at the same time, the inventors have made various attempts and finally creatively proposed the technical solution of the present application. Specifically, first, the inventors proposed to cancel the use of one emitter head in the circuit structure of the traditional plasma generator and reuse the remaining emitter head. They tried to add a time-sharing multiplexing switch to the two output ends of the transformer. However, since the interval between the generation of positive and negative ions is usually very short (microsecond level), various switches currently on the market cannot meet this response speed. Next, given that the traditional AC input plasma generator meets two points, namely, 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, thereby obtaining positive ions and negative ions respectively; the main difference between the traditional negative ion generator and the plasma generator is that the output end only needs one set of rectifier filters to obtain negative ions and output them through a single emitter head. The inventors have proposed whether it is possible to improve on the circuit basis of traditional negative ion generators, and by successively 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 so that the positive voltage can also be output, the result cannot produce positive and negative ions, and 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 cannot produce positive and negative ions. Thus, the inventors have continuously and step by step analyzed the reasons for not being able to produce positive and negative ions, and found that the circuit structure of traditional plasma or negative ion generators mainly adopts an ordinary 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, the energy output to the transmitter may be insufficient and cannot produce ions. Based on this analysis, the inventors propose that the voltage of the transformer output 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 inventors continued to analyze the components in traditional ion generator circuits. After eliminating the output rectification and filtering (including diodes and high-voltage energy storage capacitors), they ultimately proposed a structural improvement to the transformer, the core component in the circuit, so that it could output a higher voltage than the conventional transformer in traditional plasma generators. Furthermore, the transformer, in a simple harmonic oscillation state, would produce a waveform with a resonant spike at the output. When this spike voltage is large enough, this high-voltage resonant spike can be used to generate positive and negative ions on the transmitter head, generating positive ions at the positive spike moment and negative ions at the negative spike moment. At the same time, by designing other reasonable device parameters, it is possible to generate multiple high-voltage resonant spikes within a cycle, thus ensuring that the overall plasma concentration meets the requirements.

[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 enable a single emitter head to output 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 scheme.

[0055] The plasma generator 10 based on a single emitter head of the present application is described below with reference to 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 110, a resonant trigger circuit 120, a transformer 130, a coupler 140, an emitter head 150, and an isolation device 160. The power input 110 is configured to receive an AC power source. The resonant trigger circuit 120 is coupled to the power input 110 and the transformer 130, respectively. The emitter head 150 is coupled to the secondary winding of the transformer 130 via the coupler 140 and is configured to output positive and negative ions. The isolation device 160 is coupled between the primary and secondary windings of the transformer 130. Optionally, the input AC power source can range from 100V to 240V, for example, 110V AC or 220V AC.

[0058] In this application, the resonance trigger circuit 120 is used to trigger the transformer 130 to generate resonance under the action of an external AC power supply. Figure 2As shown, the resonant trigger circuit 120 includes a bidirectional trigger switch D1 and an energy storage capacitor C1. 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 is understood that the primary loop refers to the path on the primary side of the transformer 130 that forms a closed current loop.

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

[0060] In the primary circuit, the bidirectional trigger switch D1, the energy storage capacitor C1, and the primary winding are connected in series. 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] 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 jointly realize the resonant triggering effect of the transformer 130 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. Correspondingly, the conditioning unit in the resonant trigger circuit 120 includes a first conditioning resistor R1 and a second conditioning resistor R2. The first input terminal is coupled to a first node S1 of the primary loop via the first conditioning resistor R1, and the second input terminal is coupled to a second node S2 of the primary loop via the second conditioning resistor R2. The aforementioned bidirectional trigger switch D1 or energy storage capacitor C1 may be disposed 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 high-frequency noise in the connected AC power supply to reduce 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 in combination with the capacitor charging and discharging circuit to achieve the use of intermittent short-term 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 times the energy storage capacitor C1 is discharged and charged, thereby affecting the number of times the transformer 130 resonates within an AC cycle.

[0064] In this 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 is understood that the transformer 130 of the present application can boost the input power supply voltage to a higher level before outputting it. Accordingly, the resonance peaks generated by it are also larger, which can better ensure the ionization effect. For example, in certain test scenarios, the improved transformer 130 can output a high voltage exceeding 10kV, in which case the positive and negative resonance peaks can reach over 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 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. At this time, 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 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, 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 not strictly limited here.

[0074] It is understood that the first primary winding L11 and the first secondary winding L21 described above constitute a first set of coil windings for use together, and the second primary winding L12 and the second secondary winding L22 constitute a second set of coil windings for use together. Furthermore, these two sets of coil windings do not necessarily share the same coil bobbin. In other words, the transformer 130 of the present application can be obtained by combining two conventional transformers using the two connection methods described above.

[0075] The second method is to make an extended transformer 130 by using a set of extended coil 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. The preset number of turns is usually the number of turns of the coil of the conventional transformer 130 in a 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. Taking into account 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 intended to be the only limitation, as long as the voltage of the output resonance peak is large enough to cause ionization.

[0077] In this application, the emitter head 150 is used to output both positive 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 via the coupler 140, meaning that positive and negative ions are output in a time-sharing manner through only one end. It will be appreciated that in this case, 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, 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 is understandable that the emitter head 150 in this application can be a simple metal discharge needle, and does not need to be designed as a composite structure, nor does it need to be contacted with the outside world to achieve ion release, etc.

[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 embodiment, 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 head 150. In this case, the capacitor is also called 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 banks arranged in series. By coupling through multi-stage capacitors, it can better ensure 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 to prevent a current loop from being formed 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.

[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, and 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 coupled to the first and second terminals of the energy storage capacitor C1 in the resonant trigger circuit 120 via a first conditioning resistor R1 and a second conditioning resistor R2, respectively. Simultaneously, the first terminal of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 and the second primary winding L12 of the transformer 130, and the second terminal of the energy storage capacitor C1 are sequentially coupled to form a primary loop. An isolation capacitor C2 is provided between the primary and secondary windings of the transformer 130. The first and second secondary windings L21 and L22 of the transformer 130 are connected in series, with one end of the series connection coupled to the transmitter 150 via two-stage coupling capacitors C3 and C4.

[0087] In a second embodiment, if Figure 5 As shown, the power input terminal 110 is coupled to the first and second terminals of the bidirectional trigger transistor D1 in the resonant trigger circuit 120 via a first conditioning resistor R1 and a second conditioning resistor R2, respectively. Simultaneously, the first terminal of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 and the second primary winding L12 of the transformer 130, and the second terminal of the energy storage capacitor C1 are sequentially coupled to form a primary loop. An isolation capacitor C2 is provided between the primary and secondary windings of the transformer 130. The first and second secondary windings L21 and L22 of the transformer 130 are connected in series, with one end of the series connection coupled to the transmitter 150 via 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, as Figure 6 As shown, the power input terminal 110 is coupled to the first and second terminals of the energy storage capacitor C1 in the resonant trigger circuit 120 via a first conditioning resistor R1 and a second conditioning resistor R2, respectively. Simultaneously, the first terminal of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130, and the second terminal of the energy storage capacitor C1 are sequentially coupled to form a first primary loop. Furthermore, the first terminal of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130, and the second terminal of the energy storage capacitor C1 are sequentially coupled to form a second primary loop. An isolation capacitor C2 is provided between the primary and secondary windings of the transformer 130. The first and second secondary windings L21 and L22 of the transformer are connected in series, and one end of the series connection is coupled to the transmitter head 150 via 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 series connection to parallel connection, and the connection modes of other components remain unchanged.

[0091] In a fourth embodiment, as Figure 7 As shown, the power input terminal 110 is coupled to the first and second terminals of the bidirectional trigger diode D1 in the resonant trigger circuit 120 via a first conditioning resistor R1 and a second conditioning resistor R2, respectively. Simultaneously, the first terminal of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130, and the second terminal of the energy storage capacitor C1 are sequentially coupled to form a first primary loop. Furthermore, the first terminal of the energy storage capacitor C1, the bidirectional trigger diode D1, the first primary winding L11 of the transformer 130, and the second terminal of the energy storage capacitor C1 are sequentially coupled to form a second primary loop. An isolation capacitor C2 is provided between the primary and secondary windings of the transformer 130. The first and second secondary windings L21 and L22 of the transformer 130 are connected in series, with one terminal of the series connection coupled to the transmitter head 150 via 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 series connection to parallel connection, and the connection modes of other components remain unchanged.

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

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

[0095] In a sixth embodiment, Figure 9 As shown, the power input terminal 110 is coupled to the first and second terminals of the bidirectional trigger diode D1 in the resonant trigger circuit 120 via first and second conditioning resistors R1 and R2, respectively. Simultaneously, the first terminal of the energy storage capacitor C1, the bidirectional trigger diode D1, the primary winding L1 of the extended transformer 130, and the second terminal of the energy storage capacitor C1 are sequentially coupled to form a primary loop. An isolation capacitor C2 is provided between the primary and secondary windings of the transformer 130, and one terminal of the secondary winding L2 of the transformer 130 is coupled to the transmitter head 150 via two-stage coupling capacitors C3 and C4.

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

[0097] It should be understood that the aforementioned specific circuit designs are not intended to be exclusive. There is no limitation on the number of first conditioning resistor R1, second conditioning resistor R2, and coupling capacitor C3. For example, first conditioning resistor R1 can be implemented by connecting one or more resistors of different resistance values ​​in series and / or in parallel, depending on the desired values.

[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 Figure 10As shown, when the AC power input is positive half-wave, 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 transistor D1, the bidirectional trigger transistor D1 avalanche conducts, and the energy storage capacitor C1 is rapidly discharged through the bidirectional trigger transistor D1 and the coil of the primary winding of the transformer 130. Because the coil inductance of the primary winding of the transformer 130 is small and the capacity of the energy storage capacitor C1 is also small, the discharge time is very short (about 1 μs), resulting in a large discharge current. According to the principle of electromagnetic induction, the coil of the secondary winding of the transformer 130 will induce a high peak voltage. When the discharge current of the energy storage capacitor C1 decreases to a level insufficient to maintain the conduction state of the bidirectional trigger transistor D1, the bidirectional trigger transistor D1 is turned off, and the primary discharge circuit is in an open state. At this point, the energy storage capacitor C1 begins 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 Figure 11 At this time, the resonance peak generates positive and negative ions on the same discharge needle at different times, 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 transistor D1 is bidirectionally triggered, the primary winding of the transformer 130 will receive a reverse discharge current. The entire process is similar to that of the positive half-wave of AC power, the only difference being that the phase of the output resonant peak waveform is reversed by 180°.

[0101] The number of resonant peaks generated within an AC cycle can be determined based on the time constant t calculated based on the resistance values ​​of the first and second conditioning resistors R1 and R2, and the capacitance of the energy storage capacitor C1. Typically, an AC cycle is 20ms, and a resonant waveform lasts approximately 3-5µs. Therefore, the values ​​of these components can be selected based on the desired number of resonances.

[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 operating principles of other plasma generators 10 are similar, utilizing a bidirectional trigger switch in conjunction with a charge-discharge circuit for a storage capacitor to generate intermittent short-duration pulses. These short-duration pulses trigger the transformer 130 to enter a resonant state. As long as the number of resonances within an AC cycle is sufficient, the overall plasma concentration can be guaranteed to meet requirements.

[0104] The plasma generator 10 of the embodiment of the present application can use the same emission head to output both positive 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. This is 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. There is no longer the distance problem between the two emission heads. This can reduce the difficulty of the manufacturing process and effectively improve the yield rate.

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

[0106] Figure 12 A structural 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 having any of the structures described 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. Furthermore, it may also be used for pet product purification, toothbrush disinfection, and health care and physical therapy. These are just some examples of scenarios.

[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 a target surface. The target surface here refers to a surface such as an object or a 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 that it can 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 and negative ions released by the same emitter head, as long as the generated ions are removed from the target surface by using 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] The optional items in the above embodiments are also applicable to this embodiment, so they will not be described again here.

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

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

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

Claims

1. A plasma generator based on a single emitter head, characterized in that: include: A power input terminal is configured to connect to an external power source; a resonant trigger circuit coupled to the power input terminal, wherein the resonant trigger circuit includes a resistance conditioning unit, a bidirectional trigger switch, and an energy storage capacitor; a transformer, wherein a 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 resistance conditioning unit is connected in series with the power input terminal and coupled to the primary loop, and the transformer is configured to generate resonance under the charging and discharging effects 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, that is, positive ions are generated at the positive peak moment and negative ions are generated at the negative peak moment; wherein the coupler is a capacitor; An 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; The first primary winding, the second primary winding, the bidirectional trigger switch and the energy storage capacitor of the transformer are connected in series to form the primary loop.

3. The plasma generator according to claim 1, wherein: 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 parallel in the same direction; the first secondary winding and the second secondary winding are connected in series in the same direction; In which, 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 a preset number of turns.

5. The plasma generator according to claim 1, 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.

6. The plasma generator according to claim 5, 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.

7. The plasma generator according to claim 5, 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.

8. The plasma generator according to claim 1, characterized in that The isolation device is a capacitor.

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

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

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

12. The plasma generator according to claim 11, characterized in that The emission head is a metal electrode with a pointed tip structure.

13. An electronic device, characterized in that: include: The plasma generator based on a single emitter head according to any one of claims 1 to 12.

14. The electronic device according to claim 13, wherein: Also includes: A gas source is used to generate an air flow to separate the positive and negative ions generated by the plasma generator from the target surface.

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