JP4045971B2 - Shock wave sterilizer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shock wave type sterilizer, and more specifically, a food or chemical that is inserted in a liquid storage tank and enclosed in a pack or the like by a discharge shock wave generated by the electrode and immersed therein. The object to be sterilized is sterilized.
[0002]
[Prior art]
Conventionally, a heat sterilization method or the like has been used as a sterilization treatment for foods and medicines. In this heat sterilization method, food is sterilized by heating at a predetermined temperature for a required time. For example, Clostridium botulinum or the like has been confirmed to die if it is kept at a high temperature for a certain time or more even in a spore state, and takes about 400 minutes at 100 ° C. as shown in FIG. When heated at such a high temperature for a long time, the taste and nutrients of the food may be impaired. On the other hand, if the temperature is raised to 150 ° C., the time required for sterilization is about 0.6 seconds, and the higher the temperature, the shorter the time for sterilization. In this way, sterilization in a short time does not impair the taste and nutrients of the food.
[0003]
Therefore, a sterilization method using a shock wave has been proposed as a method for sterilization without modifying the object to be sterilized. From the correlation between pressure and temperature, the principle of this sterilization method using shock waves is generally recognized that 400 Mpa corresponds to a temperature of 60 ° C. and 600 Mpa corresponds to a temperature of 90 ° C. Applying to food for a period of time is equivalent to heating at a high temperature for a short time, and can sterilize the food by shock waves.
In this way, the sterilization method using shock waves is a high-temperature sterilization in a very short time, so that the sterilization target can be less denatured and the sterilization and the like are killed, but the taste and nutrients of the food that is the heating target Sterilization treatment becomes possible without impairing. Therefore, it is possible to easily sterilize retort-packed food and blood product medicines.
[0004]
In JP-A-2-307586 (Patent Document 1) proposed as a shock wave type sterilization apparatus of this type, a pulse circuit that applies a high voltage pulse voltage to one or more pairs of opposed discharge electrodes and a discharge electrode are provided. A resistance measurement circuit that measures the resistance value, a discharge electrode moving device, a motor controller that moves the discharge electrode in accordance with the resistance value of the resistance measurement circuit, and a control device that controls the inter-electrode dimensions are provided.
[0005]
[Patent Document 1]
JP-A-2-307586 [0006]
[Problems to be solved by the invention]
However, in the shock wave sterilization apparatus disclosed in JP-A-2-307586, when an electrode is consumed, a discharge electrode moving device for adjusting the distance between a pair of electrodes facing each other is required, and a resistance is required. Since a control device for controlling the measurement circuit and the inter-electrode dimensions is also necessary, there is a problem that the structure of the device becomes complicated. In particular, in the case of a configuration including a plurality of pairs of electrodes, the structure of the apparatus is further complicated, and it is very difficult to generate shock waves stably and continuously.
[0007]
The present invention has been made in view of the above-described problems. In an apparatus for generating and sterilizing a shock wave by a discharge electrode, a pair of electrodes arranged opposite to each other is not required, and it is not necessary to control the dimension between the electrodes. An object of the present invention is to provide a shock wave type sterilizer capable of generating shock waves continuously and stably while having a structure.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a food or chemical in a hermetic packaging device in which a discharge electrode is inserted into a liquid in a liquid storage tank to generate a discharge shock wave in the liquid and immersed in the liquid storage tank. A device for applying a shock wave to a sterilization object such as sterilization,
The discharge electrode includes a first electrode extending in the axial direction, a second electrode concentrically integrated with an insulating material on the outer periphery of the first electrode, or a parallel arrangement with the first electrode. Having a second electrode bound together;
The second electrode is arranged with at least one gap in the axial direction, and the shock wave for sterilization is caused by discharge between the tip of the first electrode and the second electrode on the tip side and between the second electrodes having the gap. There is provided a shock wave type sterilizer characterized by having a structure for generating the odor.
[0009]
With the above configuration, when a current is supplied to the discharge electrode, it is possible to generate a discharge between the tip of the first electrode and the second electrode on the tip side, and at least one between the second electrodes. Since the gap is opened and the adjacent second electrodes are arranged with a gap between them, a discharge can be generated even between the gaped second electrodes, and a plurality of discharge points can be formed. As described above, by generating discharge at a plurality of locations, even when the current value is constant, the discharge resistance can be increased compared to the conventional case. The energy consumed by this discharge is 2 of the current value supplied to the electrode. Since it is proportional to the power multiplied by the discharge resistance, the energy available for sterilization can be made larger than before.
[0010]
When discharge is generated at multiple locations as described above, the arc generated with discharge immediately after the start of discharge is small, but the size of this arc grows with time, and a large arc that draws an arc on the outer periphery of the electrode When it reaches a certain size, it stabilizes without changing. The liquid around the arc generated by this discharge is instantly vaporized at a high temperature and a shock wave is generated. From the correlation between the pressure of the shock wave and the temperature, when the pressure is very high, the object to be sterilized such as food or medicine in the hermetic packaging can be sterilized at a high temperature in a short time (temperature × time). In this way, a shock wave is generated by submerged discharge using the discharge electrode, and when the object to be sterilized is a food because it is a sterilization in a very short time using the shock wave, the food is prevented from being denatured, It can prevent the taste of food from being impaired.
[0011]
The discharge electrode is a uniaxial electrode having a central electrode as the first electrode and an outer peripheral electrode as the second electrode, the outer peripheral surface of the central electrode is covered with an insulating material, and the outer periphery of the insulating material is covered with the outer peripheral surface. An electrode is arranged with a gap in the axial direction, two or more gaps are provided between the outer peripheral electrodes, a number of places where discharge is generated, and a generated shock wave is superimposed on substantially the entire inside of the liquid storage tank. It is preferable that the shock wave is transmitted.
[0012]
With the above configuration, discharge occurs at a larger number of locations than when only one gap between the outer peripheral electrodes is used. Therefore, the arc can be enlarged to expand the generation range of the shock wave, and the sterilization treatment in the liquid storage tank can be efficiently performed. Can be done well.
In addition, it is preferable that the length of the outer peripheral electrode provided with a gap is 10 mm or more, preferably about 25 to 30 mm, and the gap length is about 10 mm.
[0013]
It is preferable that an enlarged diameter portion is provided at the tip of the central electrode, and the enlarged diameter portion and the outer peripheral electrode have substantially the same diameter.
With the above configuration, the outer peripheral portion of the center electrode is positioned coaxially with the outer peripheral electrode, and the same discharge as that generated between the outer peripheral electrodes sandwiching the gap is also generated between the front end of the center electrode and the outer peripheral electrode on the front end side. Can be generated.
And the thickness of the said outer periphery electrode is enlarged with 5 mm or more.
As described above, a first discharge is generated in the axial direction between the center electrode and the adjacent outer peripheral electrode, and then, between the outer electrode on the front end side and the adjacent outer peripheral electrode with a gap interposed therebetween. If the discharge is generated at the same time, and the tip end portion of the center electrode is enlarged and thickened, and the outer peripheral electrode is also thickened, continuous use is possible for a long time.
[0014]
That is, first, since the discharge in the linear direction of the shortest distance occurs between the end face facing the center electrode tip and the outer peripheral electrode and the outer peripheral electrode sandwiching the gap, and the current value is small, the surface sandwiching the gap of the opposing electrode is Does not wear out and does not change the discharge gap length. Due to the electromagnetic force generated by the discharge current generated between the electrode facing surfaces and the low resistance of the arc itself, the arc moves to the position of the opposing electrode outer peripheral surface and draws an arc between the outer peripheral surfaces. As a result, consumption starts to occur on the outer peripheral surface of the electrode. Therefore, the thickness of the electrode gradually decreases, but the discharge gap length remains unchanged. Therefore, if the tip of the center electrode is expanded to increase the thickness and the thickness of the outer peripheral electrode is increased to 5 mm or more as described above, it can be used continuously for a long time.
[0015]
The discharge amount of the discharge electrode is adjusted by setting the shape of the discharge electrode such as the axial length of the electrode, the length of the gap, and the thickness of the electrode, and the amount of energization. The pressure is set so as to be a hydraulic pressure corresponding to the sterilization temperature of the sterilization object, based on the correlation between the pressure and the temperature.
[0016]
Specifically, in the coaxial electrode, the axial length of the outer peripheral electrode of the discharge electrode is preferably 10 mm or more, more preferably 20 mm or more. If it is smaller than 10 mm, the arc cannot be sufficiently grown, and the energy consumed by the discharge (energy used for sterilization as a shock wave) is smaller than when the arc is sufficiently grown. On the other hand, if it is smaller than 10 mm, adjacent arcs are easily connected and energy used for sterilization is reduced. Furthermore, the applied voltage is 5 to 100 kV, preferably 20 to 50 kV.
[0017]
In addition, the discharge electrode is not limited to the coaxial electrode, and the outer peripheral surface of the rod-shaped first electrode is covered with an insulating material, and the insulating material is provided at one location on the outer periphery or at a plurality of locations spaced in the circumferential direction. A discharge electrode having a configuration in which the second electrode covered with the above-mentioned second electrode is arranged in series with a gap in the axial direction and band-bound is also preferably used.
The second electrode has a circular shape substantially the same cross section as the first electrode, and a plurality of second electrodes are arranged in series on the outer peripheral surface of the first electrode with a plurality of gaps , and integrated with a strong binding band. It is fixed to.
The length of each of the second electrodes arranged in series is 10 mm or more, preferably about 25 to 30 mm, and the gap length is preferably about 10 mm.
[0018]
The hermetic packaging device containing the object to be sterilized is made of a material that transmits the shock wave but does not transmit the liquid in the liquid storage tank.
With the above configuration, the sealed wrapping device transmits shock waves, so that a sterilization target such as food or medicine stored in the sealed wrapping device can be sterilized by the shock waves transmitted through the sealed wrapping device, while liquid storage The liquid in the tank can be prevented from entering the sealed packaging tool, and conversely, the liquid in the sealed packaging tool can be prevented from flowing out. Moreover, it is preferable that this airtight packaging tool has heat resistance.
[0019]
When the object to be sterilized has fluidity, the hermetic packaging tool is a tube, and the object to be sterilized is continuously circulated through the tube, and the tube is passed through the periphery of the discharge electrode.
Moreover, the said airtight packaging tool is comprised from the airtight pack which enclosed the said sterilization target object separately, and it is good also as a structure which makes this airtight pack continue and passes the circumference | surroundings of the said electrode for discharge by a continuous type or a semi-continuous type.
Further, the hermetic packaging device is composed of a hermetic pack in which the objects to be sterilized are individually enclosed. Each hermetic pack is suspended on a wire, and the wire is moved to place the hermetic pack continuously around the discharge electrode. It is good also as a structure which passes by a quasi-continuous type.
[0020]
If it is the said structure, a sterilization target object can be distribute | circulated continuously in a liquid storage tank, and the sterilization process of a sterilization target object can be performed efficiently.
Also, when sterilization is performed using a sealed pack in which objects to be sterilized are individually sealed, the sealed pack is passed continuously at a required speed according to the strength of the shock wave generated from the discharge electrode, or a semi-continuous liquid is used. By passing it through the storage tank, sterilization can be reliably performed. That is, when the shock wave generated from the discharge electrode is strong, the hermetically sealed pack is continuously passed through the liquid storage tank for efficient sterilization. On the other hand, when the shock wave is weak or when high temperature and long time are required for the sterilization treatment, the sealed pack is passed while temporarily stopping in the liquid storage tank by the semi-continuous method, and the shock wave is passed from the continuous method. Can be sterilized over a long period of time.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment of the present invention, in which water 12 is put into a liquid storage tank 11 of a shock wave sterilizer 10 and a discharge electrode 20 is suspended from above and immersed in the water 12. ing. Further, a part of the tube 30 through which the fluid food 35 that is a sterilization target is distributed is immersed in the liquid storage tank 11 and inserted therethrough. The tube 30 serves as a hermetic wrapping tool that does not allow water to permeate inside the liquid.
[0022]
As the discharge electrode 20, a coaxial discharge electrode is used as shown in FIG. The discharge electrode 20 has a substantially rod shape as a whole, a center electrode 21 (first electrode) made of a rod-shaped conductor along the center axis, an insulating material 22 covering the outer peripheral surface of the center electrode 21, and the insulation. On the outer peripheral surface of the material 22, an outer peripheral electrode 23 (second electrode) made of an annular conductor is attached. The distal end portion of the center electrode 21 is enlarged to form an enlarged diameter portion 21a, and the insulating material 22 covers the outer periphery of the central electrode 21 excluding the enlarged diameter portion 21a. The outer peripheral electrode 23 disposed on the outer peripheral surface of the insulating material 22 is disposed with a space of a required length, that is, with a gap 24 therebetween, and the first outer peripheral electrode 23A, the second outer peripheral electrode 23B, and the third outer peripheral electrode 23C from the front end side. Is arranged. In the gap 24 between these outer peripheral electrodes, the insulating material 22 is exposed on the surface.
[0023]
The outer diameter of the enlarged diameter portion 21a of the center electrode 21 is the same as the outer diameter of the first to third outer peripheral electrodes 23A to 23C. The length of the first gap 24A between the enlarged diameter portion 21a and the first outer peripheral electrode 23A is the same as the length of the second gap 24B between the first outer peripheral electrode 23A and the second outer peripheral electrode 23B, and the second outer periphery. The length is substantially the same as the length of the third gap between the electrode 23B and the third outer peripheral electrode 23C.
[0024]
In this embodiment, the conductor used as the center electrode 21 and the outer peripheral electrode 23 is made of copper, and FRP is used as the insulating material 22.
The diameter of the center electrode 21 is 20 mm, the thickness of the insulating material 22 is 10 mm, and the thickness of the outer peripheral electrode portions 23A, 23B, and 23C is 5 mm. Therefore, the outer diameter of the discharge electrode 20 is 50 mm. The lengths of the outer peripheral electrode portions 23A, 23B, and 23C in the axial direction are 27 mm, and the length of the gap 24 is 10 mm.
[0025]
The discharge electrode 20 is connected to a pulse power source 26 by a coaxial cable 25. The pulse power source 26 includes a circuit including a capacitor 27, a switch 28, and the like, and a power source 29 is connected to the pulse power source 26.
[0026]
When the switch 28 of the pulse power source 26 is closed, the electric charge stored in the capacitor 27 is introduced into the discharge electrode 20, and the gap between the enlarged diameter portion 21a at the tip of the center electrode 21 and the first outer peripheral electrode portion 23A. A first discharge is generated in the first gap 24A and an arc 40 is formed. Subsequently, a second discharge is generated in the second gap 24B between the first outer peripheral electrode portion 23A and the second outer peripheral electrode portion 23B, and the second discharge is generated between the second outer peripheral electrode portion 23B and the third outer peripheral electrode portion 23C. 3 discharges are generated and arcs 40 are formed respectively. When the arc 40 is generated in this way, the water 12 around the arc 40 is instantly vaporized due to the high temperature and a shock wave 41 is generated.
[0027]
As described above, the principle of action of the shock wave 41 by the discharge is as follows. First, as shown in FIG. 3 (A), the shortest distance discharge is generated on the opposing surfaces of the electrodes across the gap 24 (24A, 24B, 24C). Since the current value of the discharge is small, the opposing surfaces sandwiching the electrode gap are not consumed, and the discharge gap length is not changed.
When a large current is generated due to the electromagnetic force generated by the discharge current generated at the shortest distance between the electrode facing surfaces and the low resistance of the arc, as shown in FIG. A large arc 40 is generated so as to draw an arc between them. The outer surface of the electrode starts to be consumed due to the generation of this large arc, but the length of the electrode (the tip diameter-enlarged portion 21a of the center electrode, the first to third outer peripheral electrodes 23A to 23C) sandwiching the gap is increased. Can be used continuously for hours.
[0028]
The tube 30 immersed in the liquid storage tank 11 and passed below the discharge electrode 20 transmits the shock wave 41 generated by the discharge electrode 20, but does not transmit the water 12 in the liquid storage tank 11, And it forms from the raw material which does not let a liquid flow out from the inside of the tube 30, for example, is set as the rubber tube and the resin tube.
[0029]
Next, a method for sterilizing the food 35 that is an object to be sterilized using the shock wave sterilizer 10 will be described.
First, when the switch 28 of the pulse power source 26 is closed and a current is passed through the discharge electrode 20, the liquid flows in the first gap 24, the second gap 24B, and the third gap 24C of the center electrode 21 and the first outer peripheral electrode 23A. Medium discharge occurs. As a result of this submerged discharge, arcs 40 are formed in the respective gaps, and the respective arcs become gradually larger, and the arcs 40 can be overlapped to generate an arc in a wide range. The water 12 around the arc 40 is instantly vaporized at a high temperature to generate a shock wave 41. Since the arc covers a wide range, the shock wave 41 can be generated around the discharge electrode 20 in a wide range.
Since this shock wave 41 is an ultra-high pressure, it becomes a high temperature, and when the shock wave 41 is added to the food 35 circulating in the tube 30, the food 35 is heated for a short time and can be sterilized. .
[0030]
Further, according to the present apparatus, the arc is generated so as to draw an arc between the enlarged diameter portion 21a of the center electrode 21 and the outer peripheral surfaces of the first to third outer peripheral electrodes 23A, 23B, 23C. Wear occurs on the outer peripheral surface of the electrode, and almost no wear occurs on the opposing surfaces of the electrodes across the discharge gap. Therefore, the distance between discharges does not change, and the shock wave 41 can be generated continuously and stably. Thereby, the apparatus which controls the dimension between electrodes and the apparatus which detects the amount of wear become unnecessary, and the shock wave type sterilizer 10 can be made into a simple structure.
[0031]
In the above-described embodiment, two gaps are provided between the outer peripheral electrodes. However, the gap between the outer peripheral electrodes is one, and the discharge gap is set to 2 in addition to the gap between the center electrode and the outer peripheral electrode. It is good also as an individual.
Moreover, although the liquid food is distribute | circulated in the tube and it sterilizes, it is applicable not only to food but also chemicals, such as liquid or fluid blood products.
Further, the tube may pass through the liquid storage tank along the periphery of the discharge electrode in order to sufficiently apply the pressure of the shock wave generated by the discharge electrode to the food in the tube.
[0032]
FIG. 4 shows a modification of the first embodiment. When the liquid storage tank 11 is large, a plurality of the discharge electrodes 20 are provided, suspended in parallel at intervals, and arranged in parallel. The center electrode 21 of 20A is connected to the plus side of the capacitor 27 via the electric wire 70, and the outer peripheral electrode 23 of the first discharge electrode 20A is connected to the center electrode 21 of the second discharge electrode 23B. Repeatedly, three discharge electrodes are sequentially connected in series, and the outer peripheral electrode 23 of the final discharge electrode 20C is connected to the negative side of the capacitor 27 to provide a discharge circuit.
If it is set as the said structure, a shock wave can be superimposed on a sterilization target object by several discharge electrode 20A, 20B, 20C, and the sterilization operation | work of a sterilization target object can be performed more reliably.
[0033]
Furthermore, instead of arranging a plurality of discharge electrodes side by side as described above, a single discharge electrode is immersed in the liquid storage tank in the horizontal direction, not in the vertical direction, and becomes the horizontal direction. The outer peripheral electrode may be attached with a gap formed on the outer periphery of the central electrode.
In this case, the discharge gap is not provided in a plurality of locations in the vertical direction as in the first embodiment, but is provided in a plurality of locations in the horizontal direction.
[0034]
FIG. 5 shows a second embodiment of the present invention, in which the shock wave type sterilization apparatus 10 ′ hangs a sealed pack 50 individually enclosing a retort food to be sterilized on a wire 51, and the wire 51 is used as a moving means. The plurality of pulleys 52 are moved continuously and passed through the liquid storage tank 11 of the shock wave sterilizer 10 ′. The sterilization method for the object to be sterilized is performed by generating shock waves by the same method as in the first embodiment.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.
[0035]
In the present embodiment, the hermetic pack is moved by a continuous method, but may be moved by a semi-continuous method in which the hermetic pack 50 is temporarily stopped according to the strength of the shock wave.
[0036]
FIG. 6 shows a third embodiment of the present invention. In the shock wave type sterilizer 10 ″, the sealed pack 60 itself in which the retort food is individually enclosed is continuous, and is individually divided after the sterilization treatment. A roller 61 for guiding the hermetic pack 60 is installed and moved in a continuous manner, and is passed through the liquid storage tank 11 of the shock wave sterilizer 10 ″. The sterilization method for the object to be sterilized is performed by generating shock waves by the same method as in the first embodiment.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.
In this embodiment, the hermetic pack may be moved by a semi-continuous method instead of the continuous method.
[0037]
7 and 8 show a fourth embodiment of the present invention, and the discharge electrodes used are different from those of the first embodiment.
The discharge electrode 80 used in the fourth embodiment is formed on the outer periphery of the first electrode 81 in which the outer periphery of the conductor 81a is covered with the insulating material 81b, and on the outer periphery of the conductor 82a having the same cross-sectional shape as the first electrode 81. A plurality of second electrodes 82 (82A to 82D) coated with the insulating material 82b are arranged in series with gaps 83A, 83B, and 83C, and are united and integrated with the first electrode 81 by a band 84, respectively.
The first electrode 81 is connected to the plus side of the capacitor 27 via the electric wire 85, while the second electrode 82D is connected to the minus side of the capacitor 27 via the electric wire 86.
[0038]
When the discharge electrode 80 having the above configuration is put into the water 12 of the liquid storage tank 11, when the first electrode 81 is energized, a gap is formed between the tip of the first electrode 81 and the tip of the second electrode 82. Discharge occurs sequentially between the second electrodes 82A and 82B, 82B and 83C, and 83C and 84D that face each other, and an arc is generated in each gap portion, generating a shock wave.
Therefore, even when the discharge electrode 80 is used, the food 35 in the tube 30 can be sterilized by the shock wave 41 as in the first embodiment.
Moreover, in this embodiment, the area of the electrode surface of the 1st electrode 81 and the 2nd electrode 82 can be designed arbitrarily, and when it is set as a large area, a shock wave can be generated more stably continuously. Can do.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.
[0039]
【The invention's effect】
As is clear from the above description, according to the shock wave sterilization apparatus of the present invention, as the discharge electrode, the tip of the first electrode (central electrode in the case of the single axis type) and the second electrode (outer electrode in the case of the single axis type) Since at least one discharge gap is provided between the second electrode and at least two or more discharge locations, a large arc can be generated by the discharge. The high-pressure shock wave generated by the arc can be sterilized in a short time by giving an object to be sterilized such as food or medicine. Thus, since the sterilization treatment is a short time, the productivity can be increased, and there is an advantage that the food or the like is not denatured by the sterilization treatment and the taste and nutrients are not impaired in the food.
[0040]
Further, in the discharge electrode to be used, since wear is hardly generated on the gap facing surface of the electrode that can generate discharge, the distance between the electrodes can be made constant, and shock waves can be generated continuously and stably. This eliminates the need for a device for controlling the dimension between the electrodes and a device for detecting the amount of wear, and has various advantages such as a simple structure of the shock wave type sterilizer.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment of the present invention.
2A is a perspective view of a discharge electrode, and FIG. 2B is a cross-sectional view.
3A is a drawing showing an arc formed when a small current is supplied to a discharge electrode, and FIG. 3B is a drawing showing an arc formed when a large current is supplied.
FIG. 4 is a view showing a modification of the first embodiment.
FIG. 5 is a drawing showing a second embodiment of the present invention.
FIG. 6 is a view showing a third embodiment of the present invention.
FIG. 7 is a view showing a fourth embodiment of the present invention.
8A and 8B show discharge electrodes used in the fourth embodiment, wherein FIG. 8A is a perspective view and FIG. 8B is a cross-sectional view.
FIG. 9 is a drawing showing the relationship between temperature and required time for sterilization of Clostridium botulinum.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Shock wave type sterilizer 11 Liquid storage tank 12 Water 20 Discharge electrode 21 Center electrode 22 Insulation material 23 Peripheral electrode 23A, 23B, 23C 1st-3rd outer periphery electrode 24A-24C 1st-3rd gap 30 Tube 40 Arc 41 Shock wave 50, 60 sealed pack

Claims (8)

Discharge the electrodes in the liquid in the liquid storage tank, generate a discharge shock wave in the liquid, and sterilize the object to be sterilized such as food and medicine in the hermetic packaging immersed in the liquid storage tank A device for processing,
The discharge electrode includes a first electrode extending in the axial direction, a second electrode concentrically integrated with an insulating material on the outer periphery of the first electrode, or a parallel arrangement with the first electrode. Having a second electrode bound together;
The second electrode is arranged with at least one gap in the axial direction, and the shock wave for sterilization is caused by discharge between the tip of the first electrode and the second electrode on the tip side and between the second electrodes having the gap. The shock wave type sterilizer characterized by having the structure which generate | occur | produces. The discharge electrode is a uniaxial electrode having a central electrode as the first electrode and an outer peripheral electrode as the second electrode, the outer peripheral surface of the central electrode is covered with an insulating material , and the outer periphery of the insulating material is covered with the outer peripheral surface. The electrodes are arranged with a gap in the axial direction,
2. The structure according to claim 1, wherein two or more gaps are provided between the outer peripheral electrodes, a number of places where discharge is generated, and the generated shock wave is superimposed so that the shock wave is transmitted to substantially the entire liquid storage tank. The shock wave type sterilizer as described. The central tip of the electrode to the enlarged diameter portion is provided, the shock wave type sterilization device according to 請 Motomeko 2 substantially it is the same diameter and the enlarged diameter portion and the peripheral electrode.   In the discharge electrode, the outer peripheral surface of the rod-shaped first electrode is covered with an insulating material, and the second electrode covered with the insulating material is axially provided at one place on the outer periphery or at a plurality of positions spaced in the circumferential direction. The shock wave type sterilizer according to claim 1, wherein the shock wave type sterilizer is configured to be arranged in series with a gap therebetween and band-bound.   5. The shock wave type according to claim 1, wherein the hermetic packaging device containing the object to be sterilized is made of a material that transmits the shock wave but does not transmit the liquid in the liquid storage tank. Sterilizer.   6. The airtight packaging device according to claim 1, wherein the airtight packaging device is a tube, and a flowable sterilization object is continuously circulated in the tube, and the tube is passed around the discharge electrode. The shock wave sterilizer according to item 1.   The said airtight packaging tool consists of the airtight pack which enclosed the said sterilization target object individually, The said airtight pack is made continuous, It is set as the structure which passes along the circumference | surroundings of the said electrode for discharge by a continuous type or a quasi-continuous type. The shock wave type sterilizer according to any one of 5.   The discharge amount of the discharge electrode is adjusted by setting the shape and energization amount of the discharge electrode, and the hydraulic pressure generated by the discharge corresponds to the sterilization temperature of the object to be sterilized by the correlation between the pressure and the temperature. The shock wave type sterilizer according to any one of claims 1 to 7, wherein the shock wave sterilizer is set so as to be a hydraulic pressure.

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