CN206673930U - A kind of composite high pressure impulse electric field, electric field sterilization device - Google Patents
A kind of composite high pressure impulse electric field, electric field sterilization device Download PDFInfo
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- CN206673930U CN206673930U CN201720306113.3U CN201720306113U CN206673930U CN 206673930 U CN206673930 U CN 206673930U CN 201720306113 U CN201720306113 U CN 201720306113U CN 206673930 U CN206673930 U CN 206673930U
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Abstract
It the utility model is related to electric pulse and produce field, biomedicine and food processing field, the problem of presence for prior art, there is provided a kind of composite high pressure impulse electric field, electric field sterilization device.By integrating, electrical parameters detection and waveform parameter are controlled in integral trigger control circuit triggering microsecond high-voltage pulse formation circuit, ns high voltage pulse forms circuit, make its impulse waveform parameter and sequential export microsecond according to setting, ns high voltage pulse signal, it is loaded into jointly on sterilization treatment device, the composite high pressure impulse electric field loading of predetermined waveform configuration is formed on sterilization treatment device, formed to bacterial viability and the double inhibition of fertility, lift impulse electric field sterilizing efficiency, the shelf-life of the material after extension processing.
Description
Technical field
It the utility model is related to electric pulse and produce field, biomedicine and food processing field, particularly a kind of compound height
Press impulse electric field, electric field sterilization device.
Background technology
In food processing and medical field, sterilization treatment is a vital job.At present, the sterilization of commercial Application
Method has heating sterilization, chemical agent sterilization, the sterilizing of strong light etc., although these sterilizing methods can kill bacterium, due to this
A little sterilizing methods presence may cause the problems such as change of treated object composition or chemical residue, its application is existed necessarily
Limitation.For example, heating sterilization can often make the change of treated object (such as food) generation physically or chemically, it is caused
Color, the change of institutional framework and the decline of nutritive value, have a strong impact on the quality of food.Chemical agent sterilization can cause
Chemical agent residual in treated object be present.Strong light sterilizing is then because the limitation of the penetration capacity of light makes it be limited to be surface-treated.
Impulse electric field sterilizing is that the state such as sterilization technology emerging in recent years, the U.S., Germany, Japan has been delivered largely on electric field sterilization
Research report.Elzakhem reports the brewer's yeast using electric field treatment early growth period, it was demonstrated that electric field treatment can reach good
Good sterilization effect.Malicki et al. have studied influence of the high-pressure pulse electric to Escherichia coli fatal rate in liquid albumen, knot
Escherichia coli have dropped 4 Logarithmic degrees after fruit shows impulse electric field processing, while nutritional ingredient is not almost lost.U.S. in 2001
Ohio State University of state (OSU) has built up the solid high-voltage impulse generator that First is used for electric field sterilization.The university and DTI
First has the impulse electric field processing system of commercial scale to company's cooperative manufacture in the world, per hour can handle
1000L-5000L liquid food.Although China's impulse electric field sterilization technology is started late, but quickly grow.Chinese agriculture is big
, Jilin University, Tsing-Hua University, Zhejiang University, Xi'an Communications University, Southern Yangtze University, South China Science ＆ Engineering University, Fujian agricultural are big
, University Of Chongqing etc. have carried out correlative study work, and achieve some understanding in electric field sterilization mechanism etc..But mesh
Preceding such device is essentially all that the high-pressure pulse electric for being more than number microsecond using width carries out sterilization treatment, merely using this
Electric field sterilization method, due to the disruptive field intensity containing bacteria liquid (such as fresh milk or Fresh Juice) and electric field continuous action time
T it is related (substantially with t-1/3(minus three/first power) is linear), pulse width is bigger, and disruptive field intensity is lower, it is allowed to
The impulse electric field strength of loading is also lower, accordingly, it is difficult to realize that high field intensity high efficiency sterilizes, and to containing the gemma in bacteria liquid or
Person's virus does not almost act on, without broad spectrum activity.
Utility model content
Goal of the invention of the present utility model is：A kind of the problem of existing for prior art, there is provided composite high pressure pulse
Electric field, electric field sterilization device.In pulses generation field, compound microsecond high-voltage pulse shape is triggered by existing trigger control circuit
Circuit is formed into circuit, ns high voltage pulse, to produce microsecond, ns high voltage pulse signal, by controlling microsecond high-voltage pulse
Form circuit, ns high voltage pulse forms circuit discharging time interval and order, generation composite high pressure impulse electric field signal；In life
Thing medical science and food processing field, pass through composite high pressure pulse caused by above-mentioned composite high pressure impulse electric field production method or device
Electric field signal applies electric pulse P1 in process chamber containing bacteria liquid, action time is established in containing bacteria liquid as hundreds of nanoseconds extremely
The broad pulse electric field of tens of microseconds；In P1 effects simultaneously, before starting or after terminating in the short period, contain bacteria liquid to processed
Application pulse width is several nanoseconds of electric pulse P2 to few tens of nano-seconds, and action time is established in containing bacteria liquid as several nanoseconds to number
The burst pulse electric field of ten nanoseconds, width composite pulse electric field is finally established to carrying out sterilization treatment containing bacteria liquid.
The technical solution adopted in the utility model is such：
A kind of composite high pressure impulse electric field generation device includes：
DC high-voltage power supply, for the rectified boosting of civil power to be obtained into DC high voltage signal；And microsecond high pressure is given simultaneously
Pulse shaping circuit and ns high voltage pulse form circuit power supply；
Trigger control circuit, for controlling DC high-voltage power supply, microsecond high-voltage pulse formation circuit and ns high voltage pulse
Circuit is formed, and circuit is formed according to the energy-storage capacitor charge condition of microsecond high-voltage pulse formation circuit, ns high voltage pulse
The charge condition of energy-storage capacitor and the microsecond pulse and nanosecond pulse sequential, repetition rate, arteries and veins set according to experiment purpose
Rush width and form the corresponding trigger signal of circuit transmission to microsecond high-voltage pulse formation circuit and ns high voltage pulse respectively；Triggering control
Energy-storage capacitor charge condition, the ns high voltage pulse of electric circuit inspection microsecond high-voltage pulse formation circuit processed form circuit energy storage electricity
The charge condition of container, and circuit storage capacitor is formed to microsecond, nanosecond pulse according to detection data point reuse DC high-voltage power supply
The charge rate of device, microsecond, nanosecond pulse is formed the voltage of circuit energy-storage capacitor and meet system pulses amplitude, sequential, again
The requirement of complex frequency and pulse width；
Microsecond high-voltage pulse formation circuit, for being charged by DC high-voltage power supply, and according to trigger control circuit
The trigger signal of transmission produces microsecond high-voltage pulse signal；
Ns high voltage pulse forms circuit, for being charged by DC high-voltage power supply, and according to trigger control circuit
The trigger signal of transmission produces ns high voltage pulse signal；
Microsecond high-voltage pulse signal caused by microsecond high-voltage pulse formation circuit and ns high voltage pulse form circuit production
Raw ns high voltage pulse signal is loaded into load space and forms composite high pressure impulse electric field jointly；
The ns high voltage pulse, which forms circuit, includes the first charging resistor 1, the first high-voltage switch gear 2, the first high-voltage arm electricity
The low-voltage arm resistance 4 of resistance 3 and first, the first energy-storage capacitor 5, the first pulse transformer 6, the first high-voltage rectification silicon stack 7, first are put
Electric capacitor 8, sharpen switch the 9, first high voltage pulse isolation silicon stack 10；DC high-voltage circuit module and the first charging resistor 1 one
End connection；The other end of first charging resistor 1 respectively with the high-pressure side of the first high-voltage switch gear 2, the one end of the first high-voltage arm resistance 3, first
The one end of energy-storage capacitor 5 connects；The low-pressure end of first high-voltage switch gear 2 is connected to ground；The other end of first high-voltage arm resistance 3 is low with first
The one end of pressure arm resistance 4 is connected, and the other end of low-voltage arm resistance 4 is connected to ground；The other end of first energy-storage capacitor 5 and the first pulse become
The primary side high-pressure side of depressor 6 is connected, and the secondary high-pressure side of the first pulse transformer 6 is connected with the one end of the first high-voltage rectification silicon stack 7, and first
The primary and secondary side low-pressure end of pulse transformer 6 is connected to ground respectively；The other end of first high-voltage rectification silicon stack 7 discharges with first respectively
The one end of capacitor 8 is connected with 9 one end of switch are sharpened, and the other end of the first discharge capacity device 8 is connected to ground；Sharpen 9 other ends of switch
Isolate the connection of the one end of silicon stack 10 with the first high voltage pulse；First high voltage pulse isolates the other end of silicon stack 10 as ns high voltage pulse
Form circuit output end.It is general require the capacitance of the first energy-storage capacitor 5 matched with the capacitance of the first discharge capacity device 8 or more than with
The matching capacitance of first discharge capacity device 8, i.e. C5≥nC8, n is transformer voltage ratio.In C5>nC8When, need to be in the first storage capacitor
One heavy current pulse silicon stack of the both ends of device 5 parallel connection, to prevent the reverse charging of the first energy-storage capacitor 5.
Further, the microsecond high-voltage pulse formation circuit include the second charging resistor 12, the second energy-storage capacitor 13,
Second high-voltage arm resistance 14 and the second low-voltage arm resistance 15, the second high-voltage switch gear 16, the second high voltage silicon rectifier stack 17, the second pulse transforming
Device 18, the second high voltage pulse isolation silicon stack 19；DC high-voltage circuit module is connected with the one end of the second charging resistor 12；Second charging
The other end of resistance 12 is high with the one end of the second energy-storage capacitor 13, the one end of the second high-voltage arm resistance 14, the second high-voltage switch gear 16 respectively
Press bond；The other end of second energy-storage capacitor 13 is connected to ground；The other end of second high-voltage arm resistance 14 and the second low-voltage arm electricity
The connection of 15 one end is hindered, the other end of the second low-voltage arm resistance 15 is connected to ground；The low-pressure end of second high-voltage switch gear 16 is high with second respectively
The one end of silicon stack 17, the connection of the primary side high-pressure side of the second pulse transformer 18 are pressed, the other end of the second high voltage silicon rectifier stack 17 and the second pulse become
The primary side low-pressure end of depressor 18 is connected to ground；The secondary high-pressure side of second pulse transformer 18 isolates silicon stack 19 1 with the second high voltage pulse
End connection, the second high voltage pulse isolate the other end of silicon stack 19 as microsecond high-voltage pulse formation circuit output end；Second energy storage electricity
The capacitance of container 13 is far longer than the capacitance of the first energy-storage capacitor 5 (generally higher than more than 10 times)；As the second energy-storage capacitor 13 with
The charging voltage of first energy-storage capacitor 5 is identical, and the no-load voltage ratio of the first pulse transformer 6 is more than the no-load voltage ratio of the second pulse transformer 18, recommends
The no-load voltage ratio of first pulse transformer 6 is taken as more than the three times of the no-load voltage ratio of second pulse transformer 18.
Further, the control signal control DC high-voltage circuit module of the trigger control circuit output is straight by what is obtained
Stream high voltage is charged by the second charging resistor 12 to energy-storage capacitor 13, when trigger control circuit detects the second high-voltage arm resistance
14 and the common point voltage of the second low-voltage arm resistance 15 reach setting value, that is, the charging voltage for detecting energy-storage capacitor 13 reaches setting
During value, trigger control circuit module output trigger pulse Trig2 triggers the second high-voltage switch gear 16 and closed, now the second storage capacitor
Device 13 is discharged the primary side of the second pulse transformer 18, and microsecond high-voltage pulse is produced in the secondary coupling of pulse transformer 18.
Further, before the discharge process of the second energy-storage capacitor 13 while or electric discharge terminate, triggering control electricity
Road output trigger pulse Trig1 triggers the first high-voltage switch gear 2 and closed, and now the first energy-storage capacitor 5 is to the first pulse transformer 6
Primary side electric discharge, pulse transformer secondary high-pressure side coupling caused by high-voltage pulse the first discharge capacity device 8 is charged, when
When the charging of first discharge capacity device 8 reaches peak value, first sharpens the conducting of switch 9, and the first discharge capacity device 8 is sharpened by first and opened
Close 9 electric discharges and produce ns high voltage pulse；First high-voltage switch gear 2, the second high-voltage switch gear 16 are insulation self- recoverage closure switch, are pushed away
Recommend and switched using full control.The device higher especially for running frequency is required, recommend to control switch, such as IGBT entirely using semiconductor
Component or IGCT component.Sharpen switch 9 and use high-voltage high-speed closure switch, recommendation uses magnetic switch.
Electric field sterilization device also includes body conveying system containing bacterium solution, process chamber；Process chamber is connected into delivery system containing bacteria liquid
In system, enable to flow through inner treatment chamber processing chamber containing bacteria liquid containing bacteria liquid；
Microsecond high-voltage pulse described in process chamber high and low pressure electrode respectively one of corresponding and Claims 1-4 is formed into electricity
Road, ns high voltage pulse form circuit connection；So that load of the process chamber as composite high pressure impulse circuit；
When body conveying system containing bacterium solution is opened, bacteria liquid will be contained and be full of inner treatment chamber cavity；
Apply microsecond voltage pulse caused by microsecond high-voltage pulse formation circuit, microsecond voltage arteries and veins containing bacteria liquid to processed
The pulse width of punching be hundreds of nanoseconds to the electric pulse P1 of tens of microseconds, it is hundreds of nanoseconds that action time is established in containing bacteria liquid
To the broad pulse electric field of tens of microseconds；
In P1 effects simultaneously, before starting or after terminating in T time, apply nanosecond high-tension pulse containing bacteria liquid to processed
Punching, the pulse width of ns high voltage pulse is several nanoseconds of electric pulse P2 to few tens of nano-seconds, when foundation in containing bacteria liquid acts on
Between be several nanoseconds of burst pulse electric fields to few tens of nano-seconds, finally establish width composite pulse electric field to being carried out containing bacteria liquid at sterilizing
Reason；T is microsecond pulse and nanosecond pulse initial time interval, and recommendation is taken as less than 1 millisecond；The capacitance of first discharge capacity device 8
Typically it is taken equal to process chamber equivalent capacitance value.
In summary, by adopting the above-described technical solution, the beneficial effects of the utility model are：
Apply electric pulse P1 of the pulse width for hundreds of nanoseconds to tens of microseconds containing bacteria liquid to processed first, containing bacterium
Impulse electric field of the action time for hundreds of nanoseconds to tens of microseconds is established in liquid.P1 act on during or P1 terminate after it is shorter when
In, it is several nanoseconds of electric pulse P2 to few tens of nano-seconds to the processed application pulse width containing bacteria liquid, is built in containing bacteria liquid
Vertical action time is several nanoseconds of burst pulse electric fields to few tens of nano-seconds.The burst pulse electric field is superimposed upon the broad pulse electric field of P1 foundation
On or be immediately applied to before and after it containing in the bacterium in bacteria liquid, gemma or virus, bacterium, gemma or virus are formed compound
Lethal effect.The present invention can be killed in very short time containing bacterium, gemma and virus in bacteria liquid, and is used for food sterilizing
When, the food unimpeded system taste after sterilization treatment, original flavor and nutritional ingredient are remained substantially.
The nanosecond microsecond composite high pressure impulse electric field sterilizing methods are dynamic processing mode, and body conveying system containing bacterium solution will
Processed to pass through process chamber containing bacteria liquid with certain speed conveying, high-voltage pulse power source system is with certain repetition rate work
Make, to containing bacteria liquid carry out microsecond nanosecond composite high pressure impulse electric field sterilization treatment, the liquid after processing disclosure satisfy that business or
Biomedical sterile requirement.
In the nanosecond microsecond composite high pressure impulse electric field sterilizing methods, the bacteria liquid that contains can be medicinal liquid (example
Such as injection physiological saline), biological and medical waste liquid and food liquid (such as milk, fruit juice, beverage etc. or them
Mixture)；
In above-mentioned nanosecond microsecond composite high pressure impulse electric field bactericidal unit, the big I of inner treatment chamber cavity gap is according to reality
Border needs to be adjusted.
In above-mentioned nanosecond microsecond composite high pressure impulse electric field bactericidal unit, must ensure the liquid outlet of process chamber has liquid flow
Go out, cavity is full of after containing bacteria liquid could carry out next step operation, discharge breakdown phenomenon generation when avoiding loading high electric field pulse.
In above-mentioned nanosecond microsecond composite high pressure impulse electric field bactericidal unit, described electric pulse P1 is defined rectangle square wave arteries and veins
Punching, its duration can be 500ns-30 μ s, specifically can be according to the dielectric property containing bacteria liquid, flow velocity and inner treatment chamber chamber
Body space size determines.Under the electric field action of P1 and P2 pulses generations, if electric-field intensity is sufficiently large, protein molecule can quilt
Double phospholipid layers are pushed away, perforation is formed on cell membrane, cause that cytoplasm leaks or cell outer membrane material enters intracellular, make cell
Death enters procedural apoptotic state.
Short period (i.e. T values) described in above-mentioned nanosecond microsecond composite high pressure impulse electric field bactericidal unit recommends to take 1 milli
Below second, 200ns is usually no more than, the specific time determines according to sterilizing treatmenting process；
Electric pulse P2 described in above-mentioned nanosecond microsecond composite high pressure impulse electric field bactericidal unit is Exponential Decay Wave, and it is held
The continuous time can be 5ns-50ns, specifically can be big according to the dielectric property containing bacteria liquid, flow velocity and inner treatment chamber cavity gap
Small determination.The impact that P2 is used to produce the polar substances in bacterium, gemma or virus larger intensity loads.
Using this compound field bactericidal unit, electric field sterilization efficiency can be improved, while realize broad-spectrum sterilization.The opposing party
Face, due to that can reduce P1 pulse amplitude using this method, and P2 pulse width is smaller, therefore, can reduce total energy
Expend.
Brief description of the drawings
Fig. 1 the utility model composite high pressure impulse electric field theory diagrams.
Fig. 2 the utility model composite high pressure impulse electric field circuit diagrams.
Fig. 3 the utility model composite high pressure electric pulse waveform schematic diagrames.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
Related description of the present invention：
1st, process chamber is the cavity and its attaching part for applying electric field to bacterial liquid containing two electrodes (positive and negative electrode)
Part.
2nd, liquid conveying system is connected with process chamber, makes the flowable system of the liquid in process chamber.It is defeated containing bacteria liquid
Send system refer to conveying containing germy liquid by pump (containing drive motor), pipeline, valve, fluid reservoir (or liquid storage tank) and
The system of electric control panel (cabinet) composition.
Compound field sterilizing works principle is：Use electric pulse P1 and arteries and veins of the pulse width for hundreds of nanoseconds to tens of microseconds
Rush width for several nanoseconds of electric pulse P2 to few tens of nano-seconds to containing bacteria liquid carry out Combined Loading.First, it is using pulse width
The electric field that hundreds of nanoseconds establish to the electric pulse P1 of tens of microseconds, makes containing the bacterium in bacteria liquid in the presence of electric field force, by
Polarization charge is presented in the protein both ends in polarization, cell membrane and the phospholipid molecule of cell membrane.Due to protein and
The polarization characteristic of phospholipid molecule has differences, and makes to be embedded in phase is presented between the protein molecule in double phospholipid layers and double phospholipid layers
To motion, tensioning state is formed between the material molecule of different polarization characteristics.Now, it is applied pulse width for several nanoseconds to
The electric pulse P2 of few tens of nano-seconds, due to the disruptive field intensity containing bacteria liquid it is related to electric field continuous action time t (substantially with t-1/3
(minus three/first power) is linear), with the reduction in pulse duration, the impulse breakdown strength of liquid improves, right
Duration be several nanoseconds of impulse electric fields to few tens of nano-seconds for, the high pulse of electric-field intensity can be established in containing bacteria liquid
Electric field.When the electric field action that P2 is established is in the bacterium in containing bacteria liquid, gemma or virus, because its electric-field intensity is far above P1
The electric-field intensity of the electric field of foundation, the larger impact electric field force effect of intensity is formed on polar substances molecule, makes polar material
Matter molecule separates with its attachment material, or even can change polar long chain molecular configuration and its aggregating state.Cell, bacterium and its
Gemma, the bioactive substance of virus are substantially all and belong to polar substances, and therefore, this method can realize that broad spectrum activity sterilizes.It is another
Aspect, because the bioactive substance of different types of cell, bacterium and its gemma, virus has differences, it is to impulse electric field
Particularly pulsewidth be several nanoseconds to the short pulses of few tens of nano-seconds and its with the response of the combination of microsecond pulse there is also difference, this makes
It is able to must realize to cell, bacterium and its bud by selecting the short pulse of adequate impulse width and its with the combination of microsecond pulse
Spore, virus carry out selectively killing.Therefore this method can also realize selective sterilizing.Due to P1 pulses amplitude relatively
It is low, it will not can avoid causing undesirable chemical reaction to producing heating effect containing bacteria liquid.This method need not use
Chemical assistant, therefore, also in the absence of chemical residual problem.
The technical scheme forms circuit module, synchronous triggering control by DC high-voltage circuit module, microsecond ns high voltage pulse
Circuit module processed is formed, and caused microsecond ns high voltage pulse forms the composite high pressure pulse of microsecond nanosecond after being carried on process chamber
Electric field.DC high-voltage circuit module is that civil power produces DC high voltage after inversion, boosting, rectification.Microsecond, nanosecond high-tension pulse
Punching forms the emphasis that circuit module is the inventive method, and its function is to produce microsecond, ns high voltage pulse and according to synchronous triggering
The when ordered pair sterilization treatment device of control circuit module setting forms the Combined Loading to processed material.Synchronous trigger control circuit
The main output control signal of module is controlled to DC high-voltage circuit module, and produces two-way and have intervals
Trigger signal controls the High-tension Switch Devices closure conducting that microsecond, ns high voltage pulse are formed in circuit module respectively.To being located
It is the inventive method that material, which is managed, using microsecond, nanosecond composite high pressure impulse electric field loading method killing bacterium, gemma and virus
Core, by processed material apply microsecond high intensity pulses electric field action while, starting before or terminate after compared with
Apply the effect of high intensity nanosecond pulsed electric field in short time to processed material, make the polar substances in bacterium, gemma and virus
Molecule is in itself and its between adjacent material (such as protein and phospholipid molecule on cell membrane)) under microsecond pulse effect
Tensioning, recycle nanosecond pulsed electric field effect impacted it, make polar substances molecule in itself and its adjacent material it
Between structural relation destroyed, and then kill bacterium, gemma and virus or it is lost activity；Or make bacterium, gemma and disease
Polar substances molecule in poison is in itself and its structure between adjacent material is first impacted by nanosecond pulse, then by
Microsecond pulse acts on forming tensioning and disengaging effect, similarly makes polar substances molecule in itself and its between adjacent material
Structural relation is destroyed, and then is killed bacterium, gemma and virus or it is lost activity.
Circuit block diagram is as shown in Figure 1：Synchronous trigger control circuit module respectively with DC high-voltage circuit module input, micro-
Second high-voltage pulse formation circuit module input, ns high voltage pulse form the electrical connection of circuit module input；DC high-voltage
Road module forms circuit module input and is electrically connected with microsecond high-voltage pulse formation circuit module input, ns high voltage pulse respectively
Connect；Process chamber forms circuit module output end with microsecond high-voltage pulse formation circuit module output end, ns high voltage pulse respectively
Electrical connection.DC high-voltage circuit module is the input of the technical program, and its function is to obtain civil power through inversion, boosting, rectification
To DC high voltage；Microsecond, ns high voltage pulse formed circuit module function be respectively produce sterilization treatment needed for microsecond,
Ns high voltage pulse；Caused microsecond, nanosecond pulse are loaded on process chamber by certain sequential forms microsecond, nanosecond compound height
Press impulse electric field；Synchronous trigger control circuit module exports Trig control signal, forms electricity to microsecond, ns high voltage pulse respectively
Road module, DC high-voltage circuit module carry out triggering control.
Physical circuit design is as shown in Figure 2.Ns high voltage pulse, which forms circuit, includes high-voltage switch gear 2, high score depressor (by electricity
Resistance 3 and resistance 4 form), energy-storage capacitor 5, pulse transformer 6, high-voltage rectification silicon stack 7, discharge capacity device 8, sharpen switch 9,
First high voltage pulse isolation silicon stack 10 is formed.Microsecond high-voltage pulse formation circuit include energy-storage capacitor 1, high-voltage bleeder (by
Resistance 14 is formed with resistance 15), high-voltage switch gear 16, high voltage silicon rectifier stack 17, pulse transformer 18, the second high voltage pulse isolate silicon stack 19
Form.Resistance 20 and the equivalent load in parallel for forming process chamber of electric capacity 21.DC high-voltage circuit module respectively with charging resistor 1 and
The one end of charging resistor 12 connects.Ns high voltage pulse formed circuit annexation be：The one end of charging resistor 1 and DC high-voltage
The connection of road module, the other end of charging resistor 1 respectively with the high-pressure side of high-voltage switch gear 2, the one end of high-voltage bleeder high-voltage arm resistance 3, storage
The connection of energy capacitor 5 one end, the low-pressure end of high-voltage switch gear 2 are connected to ground；The other end of high-voltage bleeder high-voltage arm resistance 3 and high pressure point
The one end of depressor low-voltage arm resistance 4 is connected, and the other end of high-voltage bleeder low-voltage arm resistance 4 is connected to ground；The other end of energy-storage capacitor 5
It is connected with the primary side high-pressure side of pulse transformer 6, the secondary high-pressure side of pulse transformer 6 is connected with the one end of high-voltage rectification silicon stack 7, pulse
The primary and secondary side low-pressure end of transformer 6 is connected to ground respectively；The other end of high-voltage rectification silicon stack 7 respectively with the one end of discharge capacity device 8
Connected with 9 one end of switch are sharpened, the other end of discharge capacity device 8 is connected to ground；Sharpen switch 9 other ends and the first high voltage pulse every
Connected from the one end of silicon stack 10；First high voltage pulse isolates the equivalent load resistance 20 and electric capacity 21 of the other end of silicon stack 10 and process chamber
One end is connected, and the equivalent load resistance 20 and the other end of electric capacity 21 of process chamber are connected to ground.Microsecond high-voltage pulse formation circuit
Annexation is：The one end of charging resistor 12 is connected with DC high-voltage circuit module, and the other end of charging resistor 12 is electric with energy storage respectively
The one end of container 13, the one end of high-voltage bleeder high-voltage arm resistance 14, the connection of the high-pressure side of high-voltage switch gear 16, the other end of energy-storage capacitor 13
It is connected to ground；The other end of high-voltage bleeder high-voltage arm resistance 14 is connected with the one end of high-voltage bleeder low-voltage arm resistance 15, high pressure point
The other end of depressor low-voltage arm resistance 15 is connected to ground；The low-pressure end of high-voltage switch gear 16 respectively with the one end of high voltage silicon rectifier stack 17, pulse transforming
The primary side high-pressure side of device 18 is connected, and the other end of high voltage silicon rectifier stack 17 and the primary side low-pressure end of pulse transformer 18 are connected to ground；Pulse transforming
The secondary high-pressure side of device 18 isolate with the second high voltage pulse the one end of silicon stack 19 connection, the second high voltage pulse isolation the other end of silicon stack 19 with
The equivalent load resistance 20 of process chamber connects with the one end of electric capacity 21.In the technical scheme, after civil power inversion, boosting, rectification
It is mature technology to obtain DC voltage and synchronous trigger control circuit module, so not doing this two parts in detail in Fig. 2
Description, synchronous trigger control circuit module use the synchronous trigger control circuit module frame with input/output signal line in fig. 2
Figure represents, by the DC high-voltage circuit module in the corresponding diagram 1 of DC high-voltage circuit module 11；CTR1 controls DC high-voltage in figure
Road module charges to energy-storage capacitor 5 and 13, and Sig1, Sig2 are the output signal of high-voltage bleeder respectively, Trig1,
Trig2 is trigger signal caused by synchronous trigger control circuit module respectively, triggers high-voltage switch gear 2 and 16 respectively.
The course of work of the technical program is：First, civil power is carried out inversion, boosting, whole by DC high-voltage circuit module 11
Stream obtains DC high voltage；Secondly, the control signal Ctr1 control DC high-voltage circuits of synchronous trigger control circuit module output
Module is by obtained DC high voltage by charging resistor 1, charging resistor 12 respectively to energy-storage capacitor 5 and energy-storage capacitor 13
Charging, when by the nanosecond pulse circuit module high-voltage bleeder being made up of high-voltage arm resistance 3, low-voltage arm resistance 4 and by high pressure
The microsecond pulse circuit module high-voltage bleeder that arm resistance 14, low-voltage arm resistance 15 are formed detects the and of energy-storage capacitor 5 respectively
When the charging voltage of energy-storage capacitor 13 reaches setting value, return signal Sig1, Sig2 to synchronous trigger control circuit module；This
When, synchronous trigger control circuit module closes according to setting sequential export trigger pulse Trig2 triggering high-voltage switch gears 16, now stores up
The primary side electric discharge of the energy pulse transformer 18 of capacitor 13, microsecond high-voltage pulse is produced in the secondary coupling of pulse transformer 18；
Before the discharge process of energy-storage capacitor 13 while or electric discharge terminate in the short period, the output of synchronous trigger control circuit module
Trigger pulse Trig1 triggering high-voltage switch gears 2 close, now the primary side electric discharge of the pulse transformer 6 of energy-storage capacitor 5, in pulse
High-voltage pulse caused by the secondary high-pressure side coupling of transformer charges to discharge capacity device 8, when the charging of discharge capacity device 8 reaches peak
During value, the conducting of switch 9 is sharpened, discharge capacity device 8 produces ns high voltage pulse by sharpening the electric discharge of switch 9；Have caused by above-mentioned
There are the equivalent resistance 20 and equivalent capacity 21 that the microsecond of certain sequential relationship, nanosecond composite high pressure pulse are carried in process chamber jointly
Both ends, microsecond, nanosecond composite high pressure impulse electric field are formed on process chamber.High pressure is controlled by synchronous trigger control circuit module
Switch 2, high-voltage switch gear 16 are closed repeatedly, and microsecond, the nanosecond composite high pressure pulse electricity of repetition rate can be just produced on process chamber
.The operating voltage of energy-storage capacitor 5 and energy-storage capacitor 13 can be with identical, can also be different, in energy-storage capacitor 5 and energy storage
When the operating voltage of capacitor 13 differs, storage capacitor can be made by adjusting the resistance of charging resistor 1 and charging resistor 12
Device 5 and energy-storage capacitor 13 synchronously reach operating voltage setting value, can also be by before and after charging resistor 1 and charging resistor 12
Serial connection charge controlling switch, charging control switch is controlled to control to energy-storage capacitor 5 by synchronous trigger control circuit module
With the charge volume of energy-storage capacitor 13, charging modes design in fig. 2 is included in control signal Ctr1.
If want to produce amplitude 75kV/cm on process chamber, the microsecond high-pressure pulse electric that width is 2 μ s and in microsecond height
Pressure Electro-pulsing Field produces amplitude 175kV/cm, width 50ns ns high voltage pulse, the selection of its parameter and work after terminating
Flow is：Setting processing room clearance distance is 2mm；The operating voltage of energy-storage capacitor 5 and high-voltage switch gear 2 is set as 10kV；If
The operating voltage for determining energy-storage capacitor 13 and high-voltage switch gear 16 is 4kV；Pulse transformer 6 and pulse transformer 18 it is primary and secondary
No-load voltage ratio is 1：4, after being formed such as Fig. 2, start working.Energy-storage capacitor 5 is set by synchronous trigger control circuit module to fill
Piezoelectric voltage is 10kV, sets the charging voltage of energy-storage capacitor 13 as 4kV, sets two-way trigger signal time interval as 2 μ s, works as warp
Cross the inversion of DC high-voltage circuit module 11, boosting, the DC high voltage of rectification charge energy-storage capacitor 5, energy-storage capacitor 13
To after setting value, signal is returned to by synchronous trigger control circuit module, synchronous trigger control circuit by high-voltage bleeder
Module output trigger signal Trig2 triggering high-voltage switch gears 16 close, and (coefficient of coup is about for the pulse transformer 18 of energy-storage capacitor 13
0.94) primary side is discharged, and produces the microsecond high-voltage pulse that amplitude is 15kV in the secondary of pulse transformer 18, the microsecond high-voltage pulse adds
Amplitude 75kV/cm, the μ s of width 2 microsecond high-pressure pulse electric are formed after being downloaded to process chamber；Discharged in microsecond high-voltage pulse circuit
When closing to an end, trigger signal Trig1 is exported by synchronous trigger control circuit module, triggering high-voltage switch gear 2 closes, storage capacitor
Device pulse transformer 6 (coefficient of coup about 0.94) primary side is discharged, and 37.6kV high-voltage pulse is produced in pulse transformer secondary
Discharge capacity device 8 is charged, when discharge capacity device 8 reaches 37.6kV, sharpens the conducting of switch 9, discharge capacity device 8 passes through sharpening
Switch discharge produces ns high voltage pulse (pulse shaping coefficient 0.93), and the high-voltage pulse (amplitude about 35kV) is in microsecond high-tension pulse
Rushing finish time is loaded on process chamber formation ns high voltage pulse electric field.The oscillogram of microsecond nanosecond composite high pressure pulse is as schemed
Shown in 3, wherein transverse axis is 500ns/ lattice, and the longitudinal axis is 10kV/ lattice.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (5)
- A kind of 1. composite high pressure impulse electric field generation device, it is characterised in that including：DC high-voltage power supply, for civil power to be obtained into DC high voltage signal through inversion, boosting, rectification；It is and simultaneously high to microsecond Pulse shaping circuit and ns high voltage pulse is pressed to form circuit power supply；Trigger control circuit, for controlling DC high-voltage power supply, microsecond high-voltage pulse formation circuit and ns high voltage pulse to be formed Circuit, and circuit energy storage is formed according to the energy-storage capacitor charge condition of microsecond high-voltage pulse formation circuit, ns high voltage pulse The charge condition of capacitor and the microsecond pulse set according to experiment purpose and nanosecond pulse sequential, repetition rate, pulse are wide Degree forms circuit to microsecond high-voltage pulse formation circuit and ns high voltage pulse respectively and sends corresponding trigger signal；Triggering control electricity Energy-storage capacitor charge condition, the ns high voltage pulse of road detection microsecond high-voltage pulse formation circuit form circuit energy-storage capacitor Charge condition, and circuit energy-storage capacitor is formed to microsecond, nanosecond pulse according to detection data point reuse DC high-voltage power supply Charge rate, microsecond, nanosecond pulse is formed the voltage of circuit energy-storage capacitor and meet system pulses amplitude, sequential, repeat frequency The requirement of rate and pulse width；Microsecond high-voltage pulse formation circuit, for being charged by DC high-voltage power supply, and sent according to trigger control circuit Trigger signal produce microsecond high-voltage pulse signal；Ns high voltage pulse forms circuit, for being charged by DC high-voltage power supply, and is sent according to trigger control circuit Trigger signal produce ns high voltage pulse signal；Microsecond high-voltage pulse signal caused by microsecond high-voltage pulse formation circuit and ns high voltage pulse are formed caused by circuit Ns high voltage pulse signal is loaded into formation composite high pressure impulse electric field on sterilization treatment device jointly；The ns high voltage pulse, which forms circuit, includes the first charging resistor (1), the first high-voltage switch gear (2), the first high-voltage arm electricity Hinder (3) and the first low-voltage arm resistance (4), the first energy-storage capacitor (5), the first pulse transformer (6), the first high-voltage rectification silicon stack (7), the first discharge capacity device (8), sharpening switch (9), the first high voltage pulse isolation silicon stack (10)；DC high-voltage source module with First charging resistor (1) one end connects；First charging resistor (1) other end respectively with the first high-voltage switch gear (2) high-pressure side, first High-voltage arm resistance (3) one end, the connection of energy-storage capacitor (5) one end；First high-voltage switch gear (2) low-pressure end is connected to ground；First is high Pressure arm resistance (3) other end is connected with the first low-voltage arm resistance (4) one end, and low-voltage arm resistance (4) other end is connected to ground；Energy storage Capacitor (5) other end is connected with the first pulse transformer (6) primary side high-pressure side, the first pulse transformer (6) secondary high-pressure side It is connected with the first high-voltage rectification silicon stack (7) one end, the first pulse transformer (6) primary and secondary side low-pressure end is connected to ground respectively； First high-voltage rectification silicon stack (7) other end is connected with first discharge capacity device (8) one end and sharpening switch (9) one end respectively, the One discharge capacity device (8) other end is connected to ground；Sharpen switch (9) other end and isolate silicon stack (10) one end company with high voltage pulse Connect；High voltage pulse isolates silicon stack (10) other end and forms circuit output end as ns high voltage pulse；Typically require the first energy storage Capacitor (5) capacitance is matched with the capacitance of the first discharge capacity device (8) or held more than the matching with the first discharge capacity device (8) Value, i.e. C5≥nC8, n is transformer voltage ratio.In C5>nC8When, need to be in the first energy-storage capacitor (5) both ends high current in parallel Pulse silicon stack, to prevent the first energy-storage capacitor (5) reverse charging.
- A kind of 2. composite high pressure impulse electric field generation device according to claim 1, it is characterised in that the microsecond high pressure Pulse shaping circuit includes the second charging resistor (12), the second energy-storage capacitor (13), the second high-voltage arm resistance (14) and second Low-voltage arm resistance (15), the second high-voltage switch gear (16), the second high voltage silicon rectifier stack (17), the second pulse transformer (18), the second pulse High_voltage isolation silicon stack (19)；Second charging resistor (12) one end DC high-voltage power supply high-voltage output end is connected, the second charging electricity Hinder (12) other end respectively with the second energy-storage capacitor (13) one end, the second high-voltage arm resistance (14) one end, the second high-voltage switch gear (16) high-pressure side connects；Second energy-storage capacitor (13) other end is connected to ground；Second high voltage silicon rectifier stack (17) one end and second high Compressed switch the connection of (16) one end, and the second high voltage silicon rectifier stack other end (17) is connected to ground；Second high-voltage arm resistance (14) other end with Second low-voltage arm resistance (15) one end is connected, and the second low-voltage arm resistance (15) other end is connected to ground；Second high-voltage switch gear (16) Low-pressure end is connected with the second pulse transformer (18) primary side high-pressure side, and the second pulse transformer (18) primary side low-pressure end connects with ground Connect；Second pulse transformer (18) secondary high-pressure side isolates the connection of silicon stack (19) one end with the second high voltage pulse, and the second pulse is high Pressure isolation silicon stack (19) other end is as microsecond high-voltage pulse formation circuit output end；Second energy-storage capacitor (13) capacitance is much More than the first energy-storage capacitor (5) capacitance；Such as the second energy-storage capacitor (13) and the first energy-storage capacitor (5) charging voltage phase Together, the first pulse transformer (6) no-load voltage ratio is more than the second pulse transformer (18) no-load voltage ratio, recommends the first pulse transformer (6) no-load voltage ratio It is taken as more than the three times of second pulse transformer (18) no-load voltage ratio.
- A kind of 3. composite high pressure impulse electric field generation device according to claim 2, it is characterised in that the triggering control Obtained DC high voltage is passed through the second charging resistor (12) by the control signal control DC high-voltage circuit module of circuit output Second energy-storage capacitor (13) is charged, when trigger control circuit detects the second high-voltage arm resistance (14) and the second low-voltage arm resistance (15) common point voltage reaches setting value, that is, when detecting the charging voltage of the second energy-storage capacitor (13) and reaching setting value, makes to touch Hair control circuit module triggers the second high-voltage switch gear (16) according to setpoint frequency and sequential export trigger pulse Trig2 closes it Close, now the second energy-storage capacitor (13) discharges the primary side of the second pulse transformer (18), in the second pulse transformer (18) Secondary produce the output of microsecond high-voltage pulse.
- A kind of 4. composite high pressure impulse electric field generation device according to claim 3, it is characterised in that second energy storage Before capacitor (13) discharge process while or electric discharge terminate, trigger control circuit is touched according to setpoint frequency and sequential export Hair pulse Trig1, which triggers the first high-voltage switch gear (2), makes its closure, and now the first energy-storage capacitor (5) is to the first pulse transformer (6) primary side electric discharge, the high-voltage pulse of the secondary high-pressure side output of pulse transformer charge to the first discharge capacity device (8), when When the charging of first discharge capacity device (8) reaches peak value, switch (9) conducting is sharpened, the first discharge capacity device (8) switchs by sharpening (9) electric discharge produces ns high voltage pulse；First high-voltage switch gear (2), the second high-voltage switch gear (16) are that insulation self- recoverage closure is opened Close, preferably full control switch.The device higher especially for running frequency is required, it is preferred to use semiconductor controls switch entirely, such as IGBT components or IGCT component, it is high-voltage high-speed closure switch, preferably magnetic switch to sharpen switch (9).
- 5. based on the electric field sterilization device of one of Claims 1-4 composite high pressure impulse electric field generation device, its feature exists In also including body conveying system containing bacterium solution, process chamber；Process chamber is connected in body conveying system containing bacterium solution, enables to contain bacteria liquid Flow through sterilization treatment chamber in process chamber；Process chamber high and low pressure electrode is corresponded to respectively with it is micro- described in one of Claims 1-4 Second high-voltage pulse formation circuit, ns high voltage pulse form circuit connection；So that process chamber is as composite high pressure impulse electric field Load.
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| CN106712745A (en) * | 2017-03-28 | 2017-05-24 | 中国工程物理研究院流体物理研究所 | Composite high voltage pulse electric field, and electric field sterilization device and method |
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| CN106712745A (en) * | 2017-03-28 | 2017-05-24 | 中国工程物理研究院流体物理研究所 | Composite high voltage pulse electric field, and electric field sterilization device and method |
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