CN103055332B - Atmospheric dielectric barrier discharge plasma sterilization device - Google Patents
Atmospheric dielectric barrier discharge plasma sterilization device Download PDFInfo
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Abstract
The invention provides an atmospheric dielectric barrier discharge plasma sterilization device. The device comprises sensors (a temperature sensor, an air pressure sensor and a wind power sensor), an analysis circuit, a power supply control circuit, a plasma generation device and the like. The device adopts the principles of dielectric barrier discharge, preionization and self-inductance, so that the needed power supply voltage can be effectively reduced, the device volume is decreased, and the actual use of the sterilization device is convenient. And above all, breakdown voltage is reduced to more easily ionize gas, that is, plasma is more easily generated under the atmospheric condition, so that the density of the plasma is increased, and the sterilization efficiency of the device is improved. As thin needle tubing is adopted, the jet speed of the plasma is quickened, and the sterilization range of the plasma sterilization device is improved. In addition, the appearance design is more humanized, so that more convenience is brought to the actual operation; and for materials, heat-resistant and insulative engineering plastics with antibacterial effect after the plasma injection treatment are adopted.
Description
Technical field:
The invention belongs to plasma discharge technical field, be specifically related to method and the device relevant to the method for plasma dielectric barrier discharge sterilizing under atmospheric pressure.
Background technology:
Plasma sterilization is as a kind of low temperature sterilization method, and its feature has: (1) sterilising temp is low, can realize the direct sterilizing to organism surface; (2) sterilizing speed is fast, generally in tens seconds, in dozens of minutes, just can reach sterilization effect, is applicable to very much emergent management; (3) no coupling product, does not produce poisonous residue, to environment and operator safety; (4) sterilizing is comprehensive, can carry out effective sterilizing to all angles of complex space, profile.
Prior art is as Chinese patent 200880123007.5, utilization has the microwave energy of controlled unionized microwave radiation source and gas (mixture of noble gas or noble gas) combination, produces for biological tissue surface being waited to the low temperature plasma that carries out sterilizing.Gas and microwave energy can be transferred to plasma generating region along integrated cable assembly.This integrated cable assembly provides two-way airflow configuration, to allow gas from surface removal.
And for example Chinese patent 200810191718.8, the electrode that utilization is connected with radio frequency or high frequency electric source produces plasma micro-beam stream in insulation tube, be provided with air inlet connector, gas flow control valve switch and on and off switch, gas in air supply source is when the gap of flowing through between insulated dielectric tube internal and external electrode, breakdown ionization forms plasma and sprays outside housing, and the plasma line of this ejection can be for the object to the cleaning on various surfaces, sterilization and sterilizing.For another example Chinese patent 201020111158.3, a kind of comb-shaped electrode atmosphere plasma device for sterilization is disclosed, include transparent cover, in transparent cover, be provided with the upper and lower electrode of comb shape, one side of draw-in groove is provided with blower fan, is also provided with airstrainer between blower fan and draw-in groove, and electrode is connected with the both positive and negative polarity of external high voltage power supply respectively by wire, generation has chemically active particle, can carry out sterilization.
Above-mentioned various device is all short of to some extent aspect practicality, safety, need further improve: during (1) actual use, people wish that bactericidal unit can carry, so therefore supply voltage and volume be restricted, and need by technological means, reduce the required voltage that discharges as far as possible.(2) actual sterilizing situation is complicated and changeable, and bactericidal unit should be able to according to circumstances produce different electric fields or plasma flexibly, and this also should be able to control the occurrence scope of plasma flexibly with regard to claimed apparatus, to improve sterilizing efficiency.(3) need to consider the impact of the environmental factorss such as temperature, pressure and the generation of plasma density plasma sterilizing efficiency.(4) need to consider the safety issue of plasma sterilization device, avoid high pressure that device produces, radio frequency etc. to hurt operator.(5) said apparatus all needs external working gas or aerator, is unfavorable for using under actual environment.
Summary of the invention:
The present invention is intended to propose a kind of novel plasma sterilization method and device, to improve prior art in the deficiency of the aspects such as practicality, safety, realizes efficient, safe sterilizing, reduces device volume, reduces energy consumption and cost, tackles flexibly different situations.
The technical solution used in the present invention is: a kind of atmospheric dielectric barrier discharge plasma sterilization device, and this device comprises: shell and internal circuit, internal circuit comprises sensor, analysis circuit, voltage control circuit and plasma producing apparatus, sensor comprises temperature sensor, baroceptor and wind sensor, sensor is surveyed and is comprised temperature, the environmental condition of air pressure and wind-force, then the data of environmental condition are passed to analysis circuit, receive the analysis circuit of ambient parameter, these external environment parameters and pre-stored good parameter are compared, according to comparison result, the instruction template having set is made to corresponding change, the corresponding pre-stored good parameter of this instruction template, adjust the size of voltage parameter in instruction, thereby form new instruction, and voltage control circuit is sent to instruction, voltage control circuit regulates the voltage of inputting plasma producing apparatus after receiving instruction, or be manual adjustment by external control circuit, by operator, according to the judgement of oneself, regulated the voltage of plasma producing apparatus, plasma producing apparatus adopts the method for RF preionization to carry out preionization to gas, in the air gap, form a certain amount of equally distributed initiating electron to reduce breakdown voltage, and then adopt the mode of dielectric barrier discharge to carry out discharge breakdown to the gas of preionization, fully ionization, form plasma, act on body surface, realize safety, clean, sterilizing efficiently, reach flexible control plasma device simultaneously and produce suitable plasma to improve the object of sterilizing efficiency, when the plasma producing is by after killing bacteria, through manual adjustment, stop plasma generation or through sensor detection and after by analysis circuit analyzing and processing, send instruction and regulate plasma producing apparatus to stop producing plasma flow by voltage control circuit.
Wherein, the engineering plastics (ABS) of described shell main material for processing through Plasma ion implantation, adopt cylindrical design, whole long 10-120cm, drum diameter 2-10cm, two places at a distance of 20cm in the middle of shell are provided with two handgrip parts 24, this handgrip part is the less 1-3cm of diameter for cylinder body, but herein through thickening, and adopt frosted to process, can not only be better adiabatic, also increase the friction between operator's hand and device simultaneously, at previous handgrip part apart from 1cm place, voltage knob is set, voltage in control inputs plasma generator, at a rear handgrip part, apart from 2cm place, circuit general switch is set, controls the generation of plasma and stop, being respectively equipped with thereafter gas flowmeter, rare gas loads position, the RF preionization electrode that is ring-type at the end of shell and the external electrode of plasma producing apparatus.
Wherein, described rare gas adopts argon.
Wherein, rare gas loads position and adopts loop configuration, inner and outer diameter is respectively 2,3cm, and outer shroud is bossing, and inner circle is female, rare gas gas cylinder external diameter 79cm, the long 1525cm of bottle, rare gas gas cylinder outer shroud is female, rare gas gas cylinder inner circle is jut, this design can make plasma sterilization device and rare gas gas cylinder realize slitless connection, avoids gas leak.
Wherein, plasma producing apparatus comprises that interior electrode, the insulating barrier being connected with high-voltage output end positive pole, the external electrode that connects negative pole, cavity, cavity one side ports have the RF preionization electrode of ring-type, not conducting between external electrode and RF preionization electrode, thickness is that the interior electrode that the Copper Foil of 2mm is made is connected with the positive pole of high-frequency step-up transformer, the teflon plate that insulating medium layer is 1mm and densely covered aperture by thickness forms, and the external electrode being connected with same power cathode forms dielectric barrier discharge; Rare gas source of the gas produces rare gas stream like this, after control damper and gas flowmeter, operator utilize control damper adjusting gas flow according to the shown gas flow value of gas flowmeter, in rare gas stream entrained air, form working gas; Such gas is after preionization, through dielectric barrier discharge, realize fully ionization again, form the plasma of higher density, air chamber wall and rare gas gas cylinder all adopt the engineering plastics (ABS) that injection is processed through plasma to make, lightweight and antibacterial insulation.
Wherein, described external electrode, has designed aperture plate, pectination type, the screw type of different-diameter in advance, according to actual sterilizing situation, can choose flexibly suitable type, and diameter is large is applicable to closely sterilizing, and the plasma area of generation is large, and sterilizing speed is fast; Although diameter little because plasma area is less, sterilizing speed is poor compared with the former, plasma density is larger, is applicable to the sterilizing to gap place.
Wherein, plasma producing apparatus carries out preionization by radio-frequency electrode to gas, and utilize high-frequency step-up transformer moment to amplify DC source voltage, this high-frequency step-up transformer is the inductance coil of the electrodynamic capacity 10H-25H of ribbon core, the circuit of realizing this goal comprises: starter, switch, ballast, power supply, high-frequency step-up transformer, after Closing Switch, voltage is after high-frequency step-up transformer, at RF preionization electrode, place carries out preionization to gas, meanwhile, starter, ballast, electric power generating composition closed-loop path, because resistance in circuit is now very little, therefore can form very large electric current in circuit, ballast two ends also will form very large voltage so, the Yin Wendu of starter place rises to a certain degree and disconnects, circuit moment disconnection, current break, now ballast can be regarded power supply as, the voltage-drop loading at its two ends is on interior electrode and external electrode, thereby make both end voltage reach breakdown voltage.
Principle of the present invention is:
Dielectric barrier discharge is the effective means that obtains nonequilibrium plasma under atmospheric pressure.It can be at atmospheric pressure or higher than producing the low temperature plasma be rich in all kinds of active particles under atmospheric pressure, in environment or the antibacterial of organism and body surface kill.
The present invention adopts the dielectric barrier discharge (APDBD) under atmospheric pressure, and the plasma density of its discharge generation is even, and have little without evacuation, power consumption, utilize atmospherical discharges without advantages such as external working gas.Because dielectric barrier discharge (DBD) can produce a large amount of free radical and quasi-molecule in the discharge process producing; as OH, O, NO etc.; their chemical property is very active; be easy to react and form stable atom or molecule with other atom, molecule or other free radical; this charging method is applied in sterilizing; can effectively improve sterilizing efficiency, thereby improve the practicality of device.
Structure of the present invention mainly comprises: sensor (temperature sensor, baroceptor, wind sensor), analysis circuit, power control circuit, plasma generator etc.The temperature that sensor detects, air pressure, wind-force factor, data are passed to analysis circuit, this circuit is processed received environmental condition, analyze, and then power control circuit is sent to instruction, receive after instruction, power control circuit regulates voltage and the frequency of high-frequency step-up transformer, or by operator according to oneself judgement regulation voltage and frequency, realize control plasma producing apparatus flexibly and produce suitable plasma to improve the object of sterilizing efficiency, when the plasma producing is by after killing bacteria, can stop plasma generation or survey through sensor through manual adjustment, and stop after controlling power circuit after analysis circuit analysis.
Power control circuit mainly completes DC voltage to the conversion of square-wave voltage by half-bridge inversion circuit.Under PWM (Pulse Width Modulation) control mode, two switching tube alternations, for high frequency transformer provides pulsewidth adjustable ac square-wave voltage.The high-frequency step-up transformer that the present invention utilizes series resonant converter to form, output high frequency sinusoidal voltage, makes high voltage power supply better mate with dielectric barrier discharge load.
The present invention utilizes RF preionization, because preionization is stronger, required breakdown voltage is lower, so between two sparking electrodes, increase pre-ionization electrode, when sterilizing, first with pre-ionization electrode, gas is carried out to preionization, in the air gap, manufacture a certain amount of equally distributed initiating electron, can effectively reduce breakdown voltage.
The present invention utilizes self-inductance to reduce required supply voltage, its essence is by a high-frequency step-up transformer, amplifies the voltage that power supply provides, thereby realizes with lower input voltage, reaches higher breakdown voltage.
Described plasma producing apparatus mainly comprises: 1. the interior electrode being connected with high-voltage output end positive pole.2. insulating barrier.3. connect the external electrode of negative pole.In addition, can, by changing different external electrode shapes, produce different plasma patterns, to tackle different situations.
Described plasma producing apparatus, for improving its operability, in shape, adopts cylinder type design, and not only convenient operation personnel flexible operating, can also save storage area.Outside at device, designed handgrip part, in handgrip part front position slightly, switch has been installed and has been regulated button, handled easily personnel regulate the frequency of plasma generator.
Because described plasma producing apparatus can be worked under various environment, for avoiding directly contacting the superinfection causing with antibacterial, so the material of device should be used anti-biotic material.In addition, because needs hand-held device operates, heat-resisting, insulation that material therefor needs, to ensure operator's safety.Finally, under the prerequisite that described device requires more than guaranteeing, also should adopt as far as possible light material, so that the flexible sterilizing of operator also will be considered the intensity of material certainly.Comprehensive above analysis, the present invention adopts the engineering plastics that inject processing through plasma as main material.
Circuit is built in the shell that the material of above-mentioned condition makes, and avoids cannot normally working because ambient temperature, humidity etc. causes circuit.
The present invention's advantage is compared with prior art:
The present invention adopts dielectric barrier discharge, preionization and self-inductance, not only can effectively reduce required supply voltage, reduces device volume, is convenient to the actual use of bactericidal unit.The more important thing is, by reducing breakdown voltage, gas is more easily ionized, be also that plasma more easily produces under atmospheric condition, thereby increased the density of plasma, improve the sterilizing efficiency of this device.Adopt small needle tube, increased the speed of plasma jet, thereby improved the sterilizing scope of plasma sterilization device.In addition, appearance design is more humane, is more conducive to practical operation; On material, the engineering plastics with antibacterial effect that adopt heat-resisting, insulation and inject to process through plasma.
Accompanying drawing explanation:
Fig. 1 is the overview flow chart of plasma sterilization device sterilization process of the present invention.
Fig. 2 is the schematic appearance of plasma sterilization device of the present invention.
Fig. 3 is plasma sterilization device internal structure schematic diagram of the present invention.
Fig. 4 is the power control circuit schematic diagram that plasma sterilization device of the present invention adopts.
Fig. 5 is that the rare gas (this example adopts argon) that plasma sterilization device of the present invention adopts loads position schematic diagram, and the schematic diagram of rare gas container tank.
Fig. 6 is three kinds of dissimilar plasma producing apparatus design drawinies.
Fig. 7 is control circuit schematic diagram.
Fig. 8 is half-bridge circuit schematic diagram.
The specific embodiment:
As shown in Figure 1, the embodiment of the present invention is comprised of shell and internal circuit, internal circuit comprises sensor, analysis circuit, voltage control circuit and plasma producing apparatus, sensor comprises temperature sensor, baroceptor and wind sensor, sensor is surveyed and is comprised temperature, the environmental condition of air pressure and wind-force, then the data of environmental condition are passed to analysis circuit, receive the analysis circuit of ambient parameter, these external environment parameters and pre-stored good parameter are compared, according to comparison result, the instruction template having set (the corresponding pre-stored good parameter of this instruction template) is made to corresponding change, adjust the size of voltage parameter in instruction, thereby form new instruction, and voltage control circuit is sent to instruction, voltage control circuit regulates the voltage of inputting plasma producing apparatus after receiving instruction, or be manual adjustment by external control circuit, by operator, according to the judgement of oneself, regulated the voltage of plasma producing apparatus, plasma producing apparatus adopts the method for RF preionization to carry out preionization to gas, in the air gap, form a certain amount of equally distributed initiating electron to reduce breakdown voltage, and then adopt the mode of dielectric barrier discharge to carry out discharge breakdown to the gas of preionization, fully ionization, form plasma, act on body surface, realize safety, clean, sterilizing efficiently, reach flexible control plasma device simultaneously and produce suitable plasma to improve the object of sterilizing efficiency, when the plasma producing is by after killing bacteria, through manual adjustment, stop plasma generation or through sensor detection and after by analysis circuit analyzing and processing, send instruction and regulate plasma producing apparatus to stop producing plasma flow by voltage control circuit.
As shown in Figure 2, the engineering plastics (ABS) of plasma sterilization device shell 21 main materials of the present invention for processing through Plasma ion implantation, adopt cylindrical design, whole long 10-120cm, drum diameter 2-10cm, two places at a distance of 20cm in the middle of shell are provided with two handgrip parts 24, this handgrip part is the less 1-3cm of diameter for cylinder body, but herein through thickening, and adopt frosted to process, can not only be better adiabatic, also increase the friction between operator's hand and device simultaneously.At previous handgrip part, apart from 1cm place, voltage knob 25 is set, the voltage in control inputs plasma generator; At a rear handgrip part, apart from 2cm place, circuit general switch 23 is set, controls the generation of plasma and stop; Being respectively equipped with thereafter gas flowmeter 28, rare gas (embodiment of the present invention employing argon) loads position 22, the RF preionization electrode 26 that is ring-type at the end of shell and the external electrode 27 of plasma producing apparatus.
As shown in Figure 5, rare gas loads position 22 and adopts loop configuration, inner and outer diameter is respectively 2,3cm, and outer shroud 53 is bossing, and inner circle 52 is female, rare gas gas cylinder 54 external diameter 7-9cm, long 15-the 25cm of bottle, rare gas gas cylinder 54 outer shrouds 55 are female, rare gas gas cylinder 54 inner circles 56 are jut, this design can make plasma sterilization device and rare gas gas cylinder 54 realize slitless connection, avoids gas leak.It should be noted that, rare gas as argon be the auxiliary effect that reduces breakdown voltage, rare gas gas cylinder 54 can be dismantled flexibly, while not needing, need not load onto, and avoids affecting operator's sterilizing.
As shown in Figure 3, the core of plasma sterilization device of the present invention is plasma producing apparatus, and plasma producing apparatus comprises that interior electrode 35, the insulating barrier 34 being connected with high-voltage output end positive pole, the external electrode 27 that connects negative pole, cavity 31, cavity one side ports have the RF preionization electrode 26 of ring-type.Not conducting between external electrode 27 and RF preionization electrode 26.
Thickness is that the interior electrode 35 that the Copper Foil of 2mm is made is connected with the positive pole of high-frequency step-up transformer 47, and the teflon plate that insulating medium layer 34 is 1mm and densely covered aperture by thickness forms, and the external electrode 27 being connected with same power cathode forms dielectric barrier discharge; Rare gas source of the gas 32 produces rare gas as argon gas stream like this, after control damper 33 and gas flowmeter 28, operator utilize control damper 33 adjusting gas flows according to the shown gas flow value of gas flowmeter 28, in argon gas stream entrained air, form working gas; Such gas is after preionization, then realizes fully ionization through dielectric barrier discharge, forms the plasma of higher density.Air chamber wall and rare gas gas cylinder all adopt the engineering plastics (ABS) that injection is processed through plasma to make, lightweight and antibacterial insulation.
As shown in Figure 6, for external electrode 27, designed in advance aperture plate, pectination type, the screw type of different-diameter.According to actual sterilizing situation, can choose flexibly suitable type.The applicable closely sterilizing that diameter is large, the plasma area of generation is large, and sterilizing speed is fast; Although diameter little because plasma area is less, sterilizing speed is poor compared with the former, plasma density is larger, is applicable to the sterilizing to gap place.
As shown in Figure 4, this plasma producing apparatus carries out preionization by 26 pairs of gases of radio-frequency electrode, and utilizes the inductance coil of the electrodynamic capacity 10H-25H of high-frequency step-up transformer 47(ribbon core) moment amplification DC source voltage.The circuit of realizing this goal comprises: starter 41, switch 43, ballast 44, power supply 45, high-frequency step-up transformer 47.After Closing Switch 43, voltage is after high-frequency step-up transformer 47, at RF preionization electrode, 26 places carry out preionization to gas, meanwhile, starter 41, ballast 44, power supply 45 form closed-loop path, because resistance in circuit is now very little, therefore can form very large electric current in circuit, ballast 44 two ends also will form very large voltage so.Starter 41 Yin Wendu of place rise to a certain degree and disconnect, and circuit moment disconnects, current break, now ballast 44 can be regarded power supply as, the voltage-drop loading at its two ends on interior electrode 35 and external electrode 27, thereby make both end voltage reach breakdown voltage.
Power supply 45 provides the unidirectional current of voltage 12V, on the one hand, by control circuit 42 and half-bridge main circuit 48, unidirectional current is become to alternating current, by a high-frequency step-up transformer 47, ac frequency is risen to 3KHz-800KHz again, like this, 26 pairs of gases of RF preionization electrode carry out preionization, manufacture a certain amount of equally distributed initiating electron in the air gap; On the other hand, containing the subcircuits of ballast 44, power supply 45 voltages form high pressure after amplifying, and the gas of 27 pairs of preionization of external electrode fully ionizes, and produces plasma.Medium 34 between inside and outside electrode 35 and 27 is the teflon plate of thickness 1-2mm.
The principle of control circuit 42 as shown in Figure 7.Half-bridge PWM controller adopts the TL598 of TI company, and its output stage adopts push-pull circuit, and switching frequency can reach 300kHz.The control signal of PWM controller output must just can be used for driving IGBT(Insulated Gate Bipolar Transistor after overpower is put and isolated greatly).Power drive chip is selected IXDD404.Such pwm control signal is through overdriving, isolating, realized the isolation between control circuit and main circuit, weak control signal is converted to the driving signal that possesses certain power simultaneously, this driving signal has negative pressure (negative pulse) to half-bridge switch pipe, can directly drive half-bridge IGBT and guarantee its reliable turn-off.
The schematic diagram of half-bridge main circuit 48 as shown in Figure 8, is driving under the control of signal, half-bridge upper and lower arm switch pipe Q1 and Q2 alternate conduction, and form series resonant circuit, output AC sinusoidal voltage with the elementary leakage inductance of high-tension transformer.
The content not being described in detail in description of the present invention belongs to the known prior art of professional and technical personnel in the field.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. an atmospheric dielectric barrier discharge plasma sterilization device, is characterized in that, this device comprises: shell (21) and internal circuit, internal circuit comprises sensor, analysis circuit, voltage control circuit and plasma producing apparatus, sensor comprises temperature sensor, baroceptor and wind sensor, sensor is surveyed and is comprised temperature, the environmental condition of air pressure and wind-force, then the data of environmental condition are passed to analysis circuit, receive the analysis circuit of ambient parameter, these external environment parameters and pre-stored good parameter are compared, according to comparison result, the instruction template having set is made to corresponding change, the corresponding pre-stored good parameter of this instruction template, adjust the size of voltage parameter in instruction, thereby form new instruction, and voltage control circuit is sent to instruction, voltage control circuit regulates the voltage of inputting plasma producing apparatus after receiving instruction, or be manual adjustment by external control circuit, by operator, according to the judgement of oneself, regulated the voltage of plasma producing apparatus, plasma producing apparatus adopts the method for RF preionization to carry out preionization to gas, in the air gap, form a certain amount of equally distributed initiating electron to reduce breakdown voltage, and then adopt the mode of dielectric barrier discharge to carry out discharge breakdown to the gas of preionization, fully ionization, form plasma, act on body surface, realize safety, clean, sterilizing efficiently, reach flexible control plasma device simultaneously and produce suitable plasma to improve the object of sterilizing efficiency, when the plasma producing is by after killing bacteria, through manual adjustment, stop plasma generation or through sensor detection and after by analysis circuit analyzing and processing, send instruction and regulate plasma producing apparatus to stop producing plasma flow by voltage control circuit.
2. a kind of atmospheric dielectric barrier discharge plasma sterilization device according to claim 1, it is characterized in that, the ABS engineering plastics of described shell (21) main material for processing through Plasma ion implantation, adopt cylindrical design, whole long 10-120cm, drum diameter 2-10cm, two places at a distance of 20cm in the middle of shell are provided with two handgrip parts (24), this handgrip part is the little 1-3cm of diameter for cylinder body, but herein through thickening, and adopt frosted to process, can not only be better adiabatic, also increase the friction between operator's hand and device simultaneously, at previous handgrip part apart from 1cm place, voltage knob (25) is set, voltage in control inputs plasma generator, at a rear handgrip part, apart from 2cm place, circuit general switch (23) is set, controls the generation of plasma and stop, being respectively equipped with thereafter gas flowmeter (28), rare gas loads position (22), the RF preionization electrode (26) that is ring-type at the end of shell and the external electrode (27) of plasma producing apparatus.
3. a kind of atmospheric dielectric barrier discharge plasma sterilization device according to claim 2, is characterized in that, described rare gas adopts argon.
4. a kind of atmospheric dielectric barrier discharge plasma sterilization device according to claim 2, it is characterized in that, rare gas loads position (22) and adopts loop configuration, inner and outer diameter is respectively 2, 3cm, outer shroud (53) is bossing, inner circle (52) is female, rare gas gas cylinder (54) external diameter 7-9cm, the long 15-25cm of bottle, rare gas gas cylinder (54) outer shroud (55) is female, rare gas gas cylinder (54) inner circle (56) is jut, this design can make plasma sterilization device and rare gas gas cylinder (54) realize slitless connection, avoid gas leak.
5. a kind of atmospheric dielectric barrier discharge plasma sterilization device according to claim 1, it is characterized in that, plasma producing apparatus comprises interior electrode (35), the insulating medium layer (34) being connected with high-voltage output end positive pole, the external electrode (27) that connects negative pole, cavity (31), and cavity one side ports has the RF preionization electrode (26) of ring-type; Not conducting between external electrode (27) and RF preionization electrode (26), thickness is that the interior electrode (35) that the Copper Foil of 2mm is made is connected with the positive pole of high-frequency step-up transformer (47), the teflon plate that insulating medium layer (34) is 1mm and densely covered aperture by thickness forms, and the external electrode (27) being connected with same power cathode forms dielectric barrier discharge; Rare gas source of the gas (32) produces rare gas stream like this, after control damper (33) and gas flowmeter (28), operator utilize control damper (33) adjusting gas flow according to the shown gas flow value of gas flowmeter (28), in rare gas stream entrained air, form working gas; Such gas is after preionization, then realizes fully ionization through dielectric barrier discharge, forms the plasma of higher density, and air chamber wall and rare gas gas cylinder all adopt and through plasma, inject the ABS engineering plastics of processing and make, lightweight and antibacterial insulation.
6. a kind of atmospheric dielectric barrier discharge plasma sterilization device according to claim 5, it is characterized in that, plasma producing apparatus carries out preionization by radio-frequency electrode (26) to gas, and utilize high-frequency step-up transformer (47) moment to amplify DC source voltage, the inductance coil of the electrodynamic capacity 10H-25H that this high-frequency step-up transformer (47) is ribbon core, the circuit of realizing this goal comprises: starter (41), switch (43), ballast (44), power supply (45), high-frequency step-up transformer (47), after Closing Switch (43), voltage is after high-frequency step-up transformer (47), at RF preionization electrode (26), locate gas to carry out preionization, meanwhile, starter (41), ballast (44), power supply (45) forms closed-loop path, because resistance in circuit is now very little, therefore can form very large electric current in circuit, ballast (44) two ends also will form very large voltage so, starter (41) is located Yin Wendu and is risen to a certain degree and disconnect, circuit moment disconnection, current break, now ballast (44) can be regarded power supply as, the voltage-drop loading at its two ends is on interior electrode (35) and external electrode (27), thereby make both end voltage reach breakdown voltage.
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| CN104225638A (en) * | 2014-08-14 | 2014-12-24 | 西安交通大学 | Plasma atomized sterilization device with temperature of lower than 80 DEG C |
| CN105515343B (en) * | 2016-01-22 | 2018-11-23 | 中科新天地（合肥）环保科技有限公司 | A kind of discharge of plasma in low temperature power supply device |
| CN107837656A (en) * | 2016-09-20 | 2018-03-27 | 南京克普医疗科技有限公司 | A kind of normal temperature atmospheric pressure plasma equipment for air purge |
| KR102481599B1 (en) * | 2020-01-17 | 2022-12-27 | (주)펨토사이언스 | Plasma device having exchangeable handpiece |
| CN112004304B (en) * | 2020-08-13 | 2023-06-13 | 中国科学院合肥物质科学研究院 | Corona composite dielectric barrier discharge plasma jet generating device |
| CN115161166A (en) * | 2022-07-27 | 2022-10-11 | 安徽大学 | Experimental device for low temperature plasma inactivation microorganism |
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| KR20110030827A (en) * | 2009-09-18 | 2011-03-24 | 을지대학교 산학협력단 | Portable sterilization and treatment device for localized region |
| CN102448239A (en) * | 2012-01-10 | 2012-05-09 | 中国科学院西安光学精密机械研究所 | Dielectric barrier discharge enhanced-type low-temperature plasma brush generation device |
| CN203089967U (en) * | 2012-12-31 | 2013-07-31 | 云南航天工业有限公司 | Atmospheric dielectric barrier discharge plasma sterilization device |
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