JPS63278549A - In-liquid electric discharge device - Google Patents

Abstract

PURPOSE:To efficiently form a high electric field zone over a wide region with low energy by completely covering the discharge electrode to be impressed with a high-voltage pulse with an insulating material ('Teflon(R)', silicon, etc.) pierced with several to several hundreds micropores. CONSTITUTION:When a high-voltage pulse is impressed on plural discharge electrodes 14 provide in a cell 11 from a pulse power source 15, an electric discharge is generated from the micropores 17 piercing the insulating material 16 surrounding the discharge electrode 14. Consequently, ionization is caused in the vicinity of the micropore, and a streamer 18 is produced. By this method, an in-liq. electric discharge is generated with low energy and without being affected by the conductivity of a soln. In addition, contact probability with the soln. is enhanced, and the chemical reaction of a liq., sterilization, cytolysis, etc., can be efficiently carried out since the discharge can be generated over the wide region in the liq.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is an in-liquid number N device which is suitable for a device which performs a chemical reaction, sterilization, cell destruction, etc. by applying a high voltage pulse to cause an in-liquid discharge. Regarding.

[Conventional technology]

BACKGROUND ART Conventionally, devices for causing discharge in gas are widely known. But the solution, especially s1! It has been considered difficult to realize a device that allows discharge to occur in water or other solutions with high susceptibility. The reason is that even if you try to apply a high voltage, in the above solution,
This was thought to be impossible because a large current would flow at a low voltage and electrolysis could occur, producing gas. However, it has recently been found that it is possible to apply a high voltage even in the above solution by performing charging intermittently, for example in a pulsed manner. The development of submerged discharge technology based on the application of high voltage pulses to such solutions is strongly desired, as it is expected to bring unprecedented new developments in the chemical and biological fields. As a conventional technique regarding such submerged discharge, the second
There is a device as shown in the figure. In this device, a flat plate electrode 3 and a needle electrode 4 are provided facing each other in a solution 2 in a cell 1, and a high voltage pulse is applied between the two electrodes from a pulse power source 5.

In this device, a high-density electric field is formed at the tip of the needle electrode 4, the solution in that area is ionized, and streamers and sparks are generated depending on the voltage level.

[Problem that the invention seeks to solve]

However, in the conventional device described above, the flat electrode 3 and the needle electrode tj4
Since the needle electrodes 4 and 4 are arranged facing each other, the range affected by the high-density electric field is limited to the vicinity of the tip of the needle electrode 4. For this reason, there are many inconveniences in efficiently proceeding with chemical reactions, paralysis of microorganisms, sterilization, etc. To solve this problem, even if we simply increase the number of needle electrodes 4 or the area of flat plate electrodes 3, S in the equation below increases, so the liquid resistance R between the electrodes decreases, and a high electric field ( High voltage) cannot be applied.

R-ρ(L/S) Here, R is the resistance of the liquid between the electrodes [Ω1, ρ is the specific resistance of the liquid [Ω・α], L is the distance between the electrodes [m], and S is N8! is the cross-sectional area [cd] of the flowing part. Therefore, the problem was how to widen the high-density electric field region and how to create a high electric field region that efficiently generates streamers and sparks with low energy.

Therefore, an object of the present invention is to provide a submerged discharge device that can efficiently create a high electric field region over a wide Li region with low energy.

[Means for solving problems]

In order to solve the above-mentioned problems and achieve the object, the present invention takes the following measures. That is, the discharge electrode to which a high voltage pulse is applied was completely covered with an insulator (Teflon, silicon, etc.) with several to several hundred microscopic holes.

[Effect]

By taking such measures, the electrode area is narrowed down to only the microscopic hole, and the electric field is concentrated in this very small hole. Therefore, the liquid is ionized over a wide range, and streamers are efficiently generated.

〔Example〕

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. In the figure, 11 is a cell, 12 is a solution, 13 is a counter electrode, 14 is a discharge electrode, 15 is a pulse power source, 16 is an insulator, 17 is a microhole (pinhole), and 18 is a generated streamer. As shown in the figure, the discharge electrode 14 to which a high voltage pulse is applied is
An insulator 16 (Teflon) with several to several hundred microscopic holes 17 drilled therein.

It is completely coated with silicone, etc.).

In this device configured in this way, a pulse power source 1
When a high voltage pulse is applied from 5 to a plurality of discharge electrodes 14 disposed within the cell 11, discharge occurs from microholes 17 formed in an insulator 16 surrounding the discharge electrodes 14. Therefore, ionization occurs in the vicinity, and streamers 18 are generated.

Thus, according to the present device, it is possible to perform submerged discharge with small energy without being affected by the conductivity of the solution. In addition, the probability of contact with the solution is reduced, and discharge can be generated in a wide area within the solution, so that chemical reactions, sterilization, AM destruction, etc. of the solution can be carried out efficiently.

Note that the present invention is not limited to the above embodiments,
Of course, various modifications can be made without departing from the spirit of the invention.

〔Effect of the invention〕

According to the present invention, the discharge electrode to which a high voltage pulse is applied is made of an insulator (Teflon,
(1) In-liquid discharge can be generated with small energy regardless of the conductivity of the liquid.

(2) Since the number of submerged discharges increases, the probability of contact with the liquid increases, and a submerged discharge area can be formed over a wide range in the liquid, which can promote chemical reactions, sterilization, and LB cell destruction. .

It is possible to provide an in-liquid emitting ffi device that achieves the following effects.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing a conventional technique. DESCRIPTION OF SYMBOLS 11... Cell, 12... Solution, 13... Counter electrode, 14... Discharge bridge, 15... Pulse II source, 16
... Insulator, 17 ... Microhole (pinhole), 18
...The streamer that occurred. Applicant's agent Patent attorney Takehiko Suzue 1z Figure 1 Figure 2

Claims (1)

[Claims] a cell containing a solution; a discharge electrode disposed in the solution contained in the cell and covered with an insulator having microholes;
A submerged discharge device comprising: a counter electrode disposed to face the discharge electrode; and a pulse power source that applies a pulse voltage between the discharge electrode and the counter electrode.