CN203089967U - Atmospheric dielectric barrier discharge plasma sterilization device - Google Patents

Abstract

The utility model provides an atmospheric dielectric barrier discharge plasma sterilization device, comprising sensors (a temperature sensor, a gas pressure sensor and a wind sensor), an analysis circuit, a power supply control circuit, and a plasma generation device. The atmospheric dielectric barrier discharge plasma sterilization device adopts dielectric barrier discharge, preionization and self-induction principles, thus effectively reducing the required power supply voltage, reducing the volume of the device and facilitating the actual use of the sterilization device. More importantly, gas can be ionized easily through reduction of breakdown voltage, namely plasmas are easy to be generated under the atmospheric pressure, so that the density of the plasmas is increased and the sterilization efficiency of the device is improved. A thin needle tube is adopted, so that the speed of the jet flow of the plasmas is increased and the sterilization range of the plasma sterilization device is enlarged. In addition, the appearance design is humanized, so that the actual operation is promoted; and a material adopts engineering plastic which is heat-resistant, insulated and subjected to plasma injection treatment and has an antibacterial effect.

Description

A kind of atmospheric dielectric barrier discharge plasma sterilization device

Technical field

This utility model belongs to the plasma discharge technical field, is specifically related to the method and the device relevant with this method of plasma dielectric barrier discharge sterilization under the atmospheric pressure.

Background technology

Plasma sterilization is as a kind of low temperature sterilization method, and its characteristics have: (1) sterilising temp is low, can realize the direct sterilization to organism surface; (2) sterilization speed is fast, generally just can reach sterilization effect in tens seconds in dozens of minutes, is fit to very much emergent management; (3) no coupling product does not produce poisonous residue, to environment and operator safety; (4) sterilization can be carried out effective sterilizing to all angles of complex space, profile comprehensively.

Prior art such as Chinese patent 200880123007.5 utilize to have controlled unionized microwave radiation source and the bonded microwave energy of gas (mixture of noble gas or noble gas), and generation is used for the low temperature plasma sterilized in biological tissue surface etc.Gas and microwave energy can be transferred to plasma generating region along integrated cable assembly.This integrated cable assembly provides the 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 microbeam stream in insulation tube, be provided with air inlet connector, gas flow control valve switch and on and off switch, gas in the air supply source is when the gap of flowing through between the insulated dielectric tube internal and external electrode, breakdown ionization forms plasma and sprays outside housing, and the plasma line of this ejection can be used for the purpose of cleaning, sterilization and sterilization to various surfaces.Chinese patent 201020111158.3 for another example, a kind of comb poles atmospheric pressure plasma device that is used for sterilization is disclosed, include transparent cover, be provided with the upper and lower electrode of comb shape in the transparent cover, one side of draw-in groove is provided with blower fan, also is provided with airstrainer between blower fan and the draw-in groove, and electrode is connected with the both positive and negative polarity of external high voltage power supply respectively by lead, generation has chemically active particle, can carry out sterilization.

Above-mentioned various device all is short of aspect practicality, safety to some extent, need further improve: when (1) reality is used, people wish that bactericidal unit can carry, so therefore supply voltage and volume be restricted, and need to reduce the discharge required voltage by technological means as far as possible.(2) actual sterilization 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 just requires device should be able to control the occurrence scope of plasma flexibly, to improve sterilizing efficiency.(3) need to consider the influence that environmental factors such as temperature, pressure and plasma density article on plasma body sterilizing efficiency produce.(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 the actual environment.

Summary of the invention:

This utility model is intended to propose a kind of novel plasma sterilization method and device, to improve the deficiency of prior art at aspects such as practicality, safeties, realizes efficient, safety sterilization, reduces device volume, reduces energy consumption and cost, tackles different situations flexibly.

The technical solution adopted in the utility model is: a kind of atmospheric dielectric barrier discharge plasma sterilization device, and this device comprises: shell and internal circuit; Internal circuit comprises pick off, analysis circuit, voltage control circuit and plasma producing apparatus; Pick off comprises temperature sensor, baroceptor and wind sensor; Pick off is surveyed and is comprised temperature, the environmental condition of air pressure and wind-force, data with environmental condition pass to analysis circuit then, receive the analysis circuit of ambient parameter, the parameter that these external environment parameters and storage in advance is good is compared, according to comparison result, the instruction template that has set is made corresponding change, the parameter that this instruction template correspondence is stored in advance, promptly adjust the size of voltage parameter in the instruction, thereby form new instruction, and voltage control circuit sent instruction, voltage control circuit receives the voltage that the input plasma producing apparatus is regulated in the instruction back, be manual adjustment perhaps by external control circuit, regulate the voltage of plasma producing apparatus according to the judgement of oneself by operator, plasma producing apparatus adopts the method for RF preionization that gas is carried out preionization, in the air gap, form a certain amount of equally distributed initiating electron to reduce breakdown voltage, and then the mode that adopts dielectric barrier discharge is carried out discharge breakdown to the gas of preionization, fully ionization, form plasma, act on body surface, realize safety, cleaning, sterilization efficiently reaches flexible control plasma device simultaneously and produces suitable plasma to improve the purpose of sterilizing efficiency; After the plasma that produces is with killing bacteria, through manual adjustment stop plasma generation or through pick off survey and by the analysis circuit analyzing and processing after, send instruction and regulate plasma producing apparatus by voltage control circuit and stop to produce plasma flow.

Wherein, described shell main material is for injecting the engineering plastics of handling (ABS) through plasma ion, adopt cylindrical design, whole long 10-120cm, drum diameter 2-10cm, be provided with two handgrip parts 24 at the shell intermediate phase apart from two places of 20cm, this handgrip part is the less 1-3cm of diameter for the cylinder body, but herein through thickening, and adopt frosted to handle, can not only be better adiabatic, also increase simultaneously the friction between operator's hand and the device, apart from the 1cm place, the voltage knob is set at previous handgrip part, the voltage in the control input plasma generator; Apart from the 2cm place, circuit general switch is set at a back handgrip part, control plasma generation with stop; Be respectively equipped with gas flowmeter thereafter, rare gas loads the position, is the external electrode of cyclic RF preionization electrode and plasma producing apparatus at the end of shell.

Wherein, described rare gas adopts argon.

Wherein, rare gas loads the position and adopts loop configuration, inner and outer diameter is respectively 2,3cm, and outer shroud is a bossing, and interior circle is a female, rare gas gas cylinder external diameter 7-9cm, the long 15-25cm of bottle, rare gas gas cylinder outer shroud is a female, circle is jut in the rare gas gas cylinder, 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 that is connected with the high-voltage output end positive pole, the external electrode that connects negative pole, cavity, cavity one side ports have cyclic RF preionization electrode, not conducting between external electrode and the 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, insulating medium layer is that the teflon plate of 1mm and densely covered aperture constitutes by thickness, forms dielectric barrier discharge with the external electrode that is connected with power cathode; The rare gas source of the gas produces rare gas stream like this, behind control damper and gas flowmeter, operator utilize control damper adjustments of gas flow according to the shown gas flow value of gas flowmeter, form working gas in the rare gas stream entrained air; Such gas is after process preionization, realize abundant ionization through dielectric barrier discharge again, form the plasma of higher density, air chamber wall and rare gas gas cylinder all adopt the engineering plastics (ABS) that injection is handled through plasma to make in light weight and antibiotic insulation.

Wherein, described external electrode has designed aperture plate, pectination type, the screw type of different-diameter in advance, according to reality sterilization situation, can choose suitable type flexibly, and diameter is big is fit to closely sterilization, and the plasma area of generation is big, and sterilization speed is fast; Though diameter little because the plasma area is less, and sterilization speed is poor than the former, and plasma density is bigger, be applicable to the sterilization that the slit is located.

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 the Closing Switch, voltage is through behind the high-frequency step-up transformer, and the place carries out preionization to gas at the RF preionization electrode, meanwhile, starter, ballast, power supply constitutes the closed-loop path, because resistance is very little in the circuit at this moment, so can form very big electric current in the circuit, the ballast two ends also will form very big voltage so, the Yin Wendu of starter place rises to a certain degree and disconnects, circuit moment disconnection, current break, this moment, ballast can be regarded power supply as, the voltage at its two ends is loaded on interior electrode and the external electrode, thereby makes both end voltage reach breakdown voltage.

Principle of the present utility model is:

Dielectric barrier discharge is the effective means that obtains nonequilibrium plasma under the atmospheric pressure.It can or be higher than under the atmospheric pressure at atmospheric pressure and produces the low temperature plasma that is rich in all kinds of active particles, in the environment or the antibacterial of organism and body surface kill.

This utility model adopts the dielectric barrier discharge (APDBD) under the atmospheric pressure, and the plasma density of its discharge generation is even, and have the evacuation of need not, power consumption little, utilize atmospherical discharges to need not 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 that produces; as OH, O, NO etc.; their chemical property is very active; be easy to react with other atom, molecule or other free radical and form stable atom or molecule; this charging method is applied in the sterilization; can effectively improve sterilizing efficiency, thereby improve the practicality of device.

Structure of the present utility model mainly comprises: pick off (temperature sensor, baroceptor, wind sensor), analysis circuit, power control circuit, plasma generator etc.The temperature that pick off detects, air pressure, the wind-force factor, data are passed to analysis circuit, this circuit is handled received environmental condition, analyze, and then power control circuit is sent instruction, after receiving instruction, power control circuit is regulated the voltage and the frequency of high-frequency step-up transformer, or by judgement regulation voltage and the frequency of operator according to oneself, realize that the control plasma producing apparatus produces suitable plasma to improve the purpose of sterilizing efficiency flexibly, after the plasma that produces is with killing bacteria, can stops plasma generation or survey through manual adjustment through pick off, and by stopping behind the control power circuit after the analysis circuit analysis.

Power control circuit is mainly finished the conversion of DC voltage to square-wave voltage by half-bridge inversion circuit.Under PWM (PulseWidth Modulation) control mode, two switching tube alternations are for high frequency transformer provides pulsewidth adjustable ac square-wave voltage.The high-frequency step-up transformer that this utility model utilizes series resonant converter to constitute, output high frequency sinusoidal voltage better mates high voltage power supply and dielectric barrier discharge load.

This utility model utilizes RF preionization, because preionization is strong more, required breakdown voltage is low more, so between two sparking electrodes, increase pre-ionization electrode, when sterilization, with pre-ionization electrode gas is carried out preionization earlier, in the air gap, make a certain amount of equally distributed initiating electron, can reduce breakdown voltage effectively.

This utility model 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 reaching higher breakdown voltage with lower input voltage.

Described plasma producing apparatus mainly comprises: 1. the interior electrode that is connected with the high-voltage output end positive pole.2. insulating barrier.3. connect the external electrode of negative pole.In addition, can produce different plasma patterns, to tackle different situations by changing different external electrode shapes.

Described plasma producing apparatus in shape, adopts the cylinder type design for improving its operability, not only is convenient to operator's flexible operating, can also save the storage area.Outside at device, designed handgrip part, in handgrip part front position slightly, switch has been installed and has been regulated button, the handled easily personnel regulate the frequency of plasma generator.

Because described plasma producing apparatus can be worked under various environment, for avoiding directly to contact the superinfection that causes with antibacterial, so the material of device should use anti-biotic material.In addition, owing to need hand-held device to operate, heat-resisting, insulation that material therefor needs is to ensure operator's safety.At last, under the prerequisite that described device requires, also should adopt portable material as far as possible more than guaranteeing,, also will consider the intensity of material certainly so that operator sterilize flexibly.Analyze more than comprehensive, this utility model adopts through plasma and injects the engineering plastics of processing as main material.

Circuit is built in the shell that the material of above-mentioned condition makes, avoid because of ambient temperature, humidity etc. causes circuit can't operate as normal.

This utility model advantage compared with prior art is:

This utility model 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,, make the easier ionization of gas, also be that plasma more is easy to generate under atmospheric condition, thereby increased the density of plasma, improve the sterilizing efficiency of this device by reducing breakdown voltage.Adopt small needle tube, increased the speed of plasma jet, thereby improved the sterilization scope of plasma sterilization device.In addition, appearance design is more humane, more helps practical operation; On the material, the engineering plastics that adopt heat-resisting, insulation and inject to handle with antibacterial effect through plasma.

Description of drawings:

Fig. 1 is the overview flow chart of plasma sterilization device sterilization process of the present utility model.

Fig. 2 is the schematic appearance of plasma sterilization device of the present utility model.

Fig. 3 is a plasma sterilization device internal structure sketch map of the present utility model.

Fig. 4 is the power control circuit schematic diagram that plasma sterilization device of the present utility model adopts.

Fig. 5 is that the rare gas (this example adopts argon) that plasma sterilization device of the present utility model adopts loads the position sketch map, and the sketch map of rare gas container tank.

Fig. 6 is three kinds of dissimilar plasma producing apparatus design drawinies.

Fig. 7 is the control circuit schematic diagram.

Fig. 8 is the half-bridge circuit schematic diagram.

The specific embodiment

As shown in Figure 1, this utility model embodiment is made up of shell and internal circuit; Internal circuit comprises pick off, analysis circuit, voltage control circuit and plasma producing apparatus; Pick off comprises temperature sensor, baroceptor and wind sensor; Pick off is surveyed and is comprised temperature, the environmental condition of air pressure and wind-force, data with environmental condition pass to analysis circuit then, receive the analysis circuit of ambient parameter, the parameter that these external environment parameters and storage in advance is good is compared, according to comparison result, the instruction template (parameter that this instruction template correspondence is stored in advance) that has set is made corresponding change, promptly adjust the size of voltage parameter in the instruction, thereby form new instruction, and voltage control circuit sent instruction, voltage control circuit receives the voltage that the input plasma producing apparatus is regulated in the instruction back, be manual adjustment perhaps by external control circuit, regulate the voltage of plasma producing apparatus according to the judgement of oneself by operator, plasma producing apparatus adopts the method for RF preionization that gas is carried out preionization, in the air gap, form a certain amount of equally distributed initiating electron to reduce breakdown voltage, and then the mode that adopts dielectric barrier discharge is carried out discharge breakdown to the gas of preionization, fully ionization, form plasma, act on body surface, realize safety, cleaning, sterilization efficiently reaches flexible control plasma device simultaneously and produces suitable plasma to improve the purpose of sterilizing efficiency; After the plasma that produces is with killing bacteria, through manual adjustment stop plasma generation or through pick off survey and by the analysis circuit analyzing and processing after, send instruction and regulate plasma producing apparatus by voltage control circuit and stop to produce plasma flow.

As shown in Figure 2, plasma sterilization device shell 21 main materials of the present utility model are for injecting the engineering plastics of handling (ABS) through plasma ion, adopt cylindrical design, whole long 10-120cm, drum diameter 2-10cm, be provided with two handgrip parts 24 at the shell intermediate phase apart from two places of 20cm, this handgrip part is the less 1-3cm of diameter for the cylinder body, but herein through thickening, and adopt frosted to handle, can not only be better adiabatic, also increase the friction between operator's hand and the device simultaneously.Apart from the 1cm place, voltage knob 25 is set at previous handgrip part, the voltage in the control input plasma generator; Apart from the 2cm place, circuit general switch 23 is set at a back handgrip part, control plasma generation with stop; Be respectively equipped with gas flowmeter 28 thereafter, rare gas (this utility model embodiment adopts argon) loads position 22, is the external electrode 27 of cyclic RF preionization electrode 26 and plasma producing apparatus at the end of shell.

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 a bossing, and interior circle 52 is a female, rare gas gas cylinder 54 external diameters 7-9cm, long 15-the 25cm of bottle, rare gas gas cylinder 54 outer shrouds 55 are female, circle 56 is a jut in the rare gas gas cylinder 54, this design can make plasma sterilization device and rare gas gas cylinder 54 realize slitless connection, avoids gas leak.Need to prove that rare gas such as argon have been the auxiliary effects that reduces breakdown voltage, rare gas gas cylinder 54 can be dismantled flexibly, need not load onto when not required, avoids influencing operator's sterilization.

As shown in Figure 3, the core of plasma sterilization device of the present utility model is a plasma producing apparatus, and plasma producing apparatus comprises that interior electrode 35, the insulating barrier 34 that is connected with the high-voltage output end positive pole, the external electrode 27 that connects negative pole, cavity 31, cavity one side ports have cyclic RF preionization electrode 26.Not conducting between external electrode 27 and the 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 insulating medium layer 34 is that the teflon plate of 1mm and densely covered aperture constitutes by thickness, forms dielectric barrier discharges with the external electrode 27 that is connected with power cathode; Rare gas source of the gas 32 produces rare gas such as argon gas stream like this, behind control damper 33 and gas flowmeter 28, operator utilize control damper 33 adjustments of gas flows according to gas flowmeter 28 shown gas flow values, form working gas in the argon gas stream entrained air; Such gas is realized abundant ionization through dielectric barrier discharge again through after the preionization, forms the plasma of higher density.Air chamber wall and rare gas gas cylinder all adopt the engineering plastics (ABS) that injection is handled through plasma to make in light weight and antibiotic insulation.

As shown in Figure 6, for external electrode 27, designed aperture plate, pectination type, the screw type of different-diameter in advance.According to reality sterilization situation, can choose suitable type flexibly.The suitable closely sterilization that diameter is big, the plasma area of generation is big, and sterilization speed is fast; Though diameter little because the plasma area is less, and sterilization speed is poor than the former, and plasma density is bigger, be applicable to the sterilization that the slit is located.

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 the Closing Switch 43, voltage is through behind the high-frequency step-up transformer 47,26 places carry out preionization to gas at the RF preionization electrode, meanwhile, starter 41, ballast 44, power supply 45 constitute the closed-loop path, because resistance is very little in the circuit at this moment, so can form very big electric current in the circuit, ballast 44 two ends also will form very big voltage so.Starter 41 Yin Wendu of place rise to a certain degree and disconnect, circuit moment disconnection, and current break, this moment, ballast 44 can be regarded power supply as, and the voltage at its two ends is loaded on interior electrode 35 and the external electrode 27, thereby makes 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 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, make a certain amount of equally distributed initiating electron in the air gap; On the other hand, contain 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 carries out abundant ionization, produce plasma.Medium 34 between the 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).The power drive chip is selected IXDD404 for use.Such pwm control signal is through overdriving, isolating, realized the isolation between control circuit and the main circuit, simultaneously weak control signal is converted to the driving signal that possesses certain power, this driving signal has negative pressure (negative pulse) to the 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, under the control that drives signal, half-bridge is arm switch pipe Q1 and Q2 alternate conduction up and down, and forms series resonant circuit, output AC sinusoidal voltage with the elementary leakage inductance of high-tension transformer.

The content that is not described in detail in this utility model description belongs to this area professional and technical personnel's known prior art.

The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from this utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (7)

1. an atmospheric dielectric barrier discharge plasma sterilization device is characterized in that, this device comprises: shell (21) and internal circuit; Internal circuit comprises pick off, analysis circuit, voltage control circuit and plasma producing apparatus; Pick off comprises temperature sensor, baroceptor and wind sensor; Pick off is surveyed and is comprised temperature, the environmental condition of air pressure and wind-force, data with environmental condition pass to analysis circuit then, receive the analysis circuit of ambient parameter, the parameter that these external environment parameters and storage in advance is good is compared, according to comparison result, the instruction template that has set is made corresponding change, the parameter that this instruction template correspondence is stored in advance, promptly adjust the size of voltage parameter in the instruction, thereby form new instruction, and voltage control circuit sent instruction, voltage control circuit receives the voltage that the input plasma producing apparatus is regulated in the instruction back, be manual adjustment perhaps by external control circuit, regulate the voltage of plasma producing apparatus according to the judgement of oneself by operator, plasma producing apparatus adopts the method for RF preionization that gas is carried out preionization, in the air gap, form a certain amount of equally distributed initiating electron to reduce breakdown voltage, and then the mode that adopts dielectric barrier discharge is carried out discharge breakdown to the gas of preionization, fully ionization, form plasma, act on body surface, after the plasma that produces is with killing bacteria, stop plasma generation or survey through manual adjustment through pick off, and, send instruction and stop to produce plasma flow by voltage control circuit adjusting plasma producing apparatus by after the analysis circuit analyzing and processing.

2. a kind of atmospheric dielectric barrier discharge plasma sterilization device according to claim 1, it is characterized in that, described shell (21) main material is for injecting the engineering plastics of handling through plasma ion, adopt cylindrical design, whole long 10-120cm, drum diameter 2-10cm, be provided with two handgrip parts (24) at the shell intermediate phase apart from two places of 20cm, this handgrip part is the less 1-3cm of diameter for the cylinder body, but herein through thickening, and adopt frosted to handle, at previous handgrip part apart from the 1cm place, voltage knob (25) is set, the voltage in the control input plasma generator; Apart from the 2cm place, circuit general switch (23) is set at a back handgrip part, control plasma generation with stop; Be respectively equipped with gas flowmeter (28) thereafter, rare gas loads position (22), is the external electrode (27) of cyclic RF preionization electrode (26) and plasma producing apparatus at the end of shell.

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 a bossing, interior circle (52) is a female, rare gas gas cylinder (54) external diameter 7-9cm, long 15-the 25cm of bottle, rare gas gas cylinder (54) outer shroud (55) is a female, circle (56) is a jut in the rare gas gas cylinder (54), and this design can make plasma sterilization device and rare gas gas cylinder (54) realize slitless connection, avoids 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 the interior electrode (35) that is connected with the high-voltage output end positive pole, insulating barrier (34), connect the external electrode (27) of negative pole, cavity (31), cavity one side ports has cyclic RF preionization electrode (26), not conducting between external electrode (27) and the 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), insulating medium layer (34) is that the teflon plate of 1mm and densely covered aperture constitutes by thickness, forms dielectric barrier discharge with the external electrode that is connected with power cathode (27).

6. a kind of atmospheric dielectric barrier discharge plasma sterilization device according to claim 5 is characterized in that, described external electrode (27) has designed aperture plate, pectination type, the screw type of different-diameter in advance.

7. 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, this high-frequency step-up transformer (47) is the inductance coil of the electrodynamic capacity 10H-25H of 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 the Closing Switch (43), behind the voltage process high-frequency step-up transformer (47), locate gas is carried out preionization at RF preionization electrode (26), meanwhile, starter (41), ballast (44), power supply (45) constitutes the closed-loop path, because resistance is very little in the circuit at this moment, so can form very big electric current in the circuit, ballast (44) two ends also will form very big voltage so, starter (41) is located Yin Wendu and is risen to a certain degree and disconnect, circuit moment disconnection, current break, ballast this moment (44) can be regarded power supply as, the voltage at its two ends is loaded on interior electrode (35) and the external electrode (27), thereby makes both end voltage reach breakdown voltage.

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