JP2012038510A - Ion generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate negative ions stably from an ion generator by removing charges.SOLUTION: A negative electrode (4) supported by an insulator (21) is provided in the radial center of a synthetic resin pipe (8) through which fluid is fed from the upstream side toward the downstream side. On the downstream side of the negative electrode (4), a positive electrode (5) which penetrates the wall surface of the pipe (8) and exposes the tip from the inner wall is provided. Since charges around the positive electrode (5) are neutralized by the electrode (5) exposed from the inner wall of the pipe (8), the ion generator (20) can generate negative ions stably.

Description

  The present invention relates to an ion generator used for wastewater treatment.

In commercial kitchens such as restaurants, food processing factories, and lunch centers, grease traps must be provided for wastewater treatment.
The grease trap uses multiple treatment tanks to treat the wastewater, and removes the dirt by precipitating the dirt in the treatment tank. At that time, there is a problem that oil components with small specific gravity stay in the upper part of the tank and give off a bad odor. .

As one of the solutions, for example, there is a purification method in which the treatment tank is aerated with air containing negative ions to eliminate malodors.
The purification device used for such purification has, for example, a structure in which an ion generator 2 is provided between the blower pump 1 and the compressed air discharge port 3 in the device, as shown in FIG. A pipe 7 is laid between the discharge port 3 and the treatment layer 6 for use.
As schematically shown in FIG. 9A, the ion generator 2 includes a brush (or needle) -like negative (discharge) electrode 4 and a positive (opposite) arranged opposite to the negative electrode 4. It consists of the electrode 5. For this reason, the electrodes 4 and 5 are provided by using a pipe 8 that connects the blower pump 1 and the discharge port 3, for example.
By the way, for the pipe 8 and the pipe 7, for example, resin pipes such as vinyl chloride are used because of durability, oil resistance, corrosion resistance, ease of processing, and low cost.
However, the vinyl chloride used for the pipe 8 and the pipe 7 is an insulator and is easily charged with “−” between the blown air. Therefore, the negative ions generated at the negative electrode 4 stay inside the pipe 8 leading to the positive electrode 5 as shown in FIG. 9A, and the generation of negative ions from the negative electrode 4 is remarkably hindered. there were.
As one method for solving such a problem, there is a purification device as shown in Patent Document 1.

In this purification device, as shown in FIG. 8, the ion generator 2 is composed of a generation tube 9 made of metal (conductor) and a negative electrode 4 provided in the generation tube 9.
The generating tube 9 is provided with a supply port 10 and a discharge port 11. In addition, a lead wire 12 is inserted into the generating cylinder 9, and the minus electrode 4 is attached to the tip of the inserted lead wire 12.

  The ion generator 2 connects the rear end of the lead wire 12 protruding from the upper part of the generating cylinder 9 to a negative power source and connects the generating cylinder 9 to a positive power source. Then, air is introduced from the supply port 10 by the blower pump 1. Then, negative ions are discharged and discharged from the discharge port 11 by corona discharge of the negative electrode 4 at the tip of the lead wire 12. At that time, the negative ions coming into contact with the inner wall of the generating cylinder 9 become free electrons and flow to the positive power source because the inner wall is kept at a positive potential. Therefore, the charging phenomenon does not occur and negative ions do not stay in the generation cylinder. As a result, a large amount of negative ions can be discharged.

However, in the metal ion generator 2 described above, the structure of the metal generator tube 9 is more complicated than that of a conventional vinyl chloride pipe provided with electrodes 4 and 5. Therefore, the shape becomes large and the weight becomes heavy. As a result, there is a problem that the cost is high and the purification device that can be used is also limited.
Therefore, it was examined whether generation of negative ions could be improved by using a conventional resin pipe (particularly vinyl chloride) 8.

First, in order to reduce the number of charged portions in FIG. 9A, the cylindrical positive electrode 5 was brought close to the negative electrode 4 as shown in FIG. 9B. As described above, when the plus electrode 5 is brought close to the minus electrode 4, minus ions flow from the minus electrode 4 to the plus electrode 5, and the minus ions flowing into the pipe 8 are remarkably reduced.
Therefore, as shown in FIG. 9C, the cylindrical positive electrode 5 is provided on the outer periphery of the pipe 8 to reduce the electric field strength of the positive electrode 5. Then, as shown in FIG. 9C, the inner side of the pipe 8 (the inner side of the positive electrode 5) was charged to “−” to prevent the generation of negative ions.
Therefore, as shown in FIG. 9D, a small hole is provided in the pipe 8 so that the charged electric charge is moved to the positive electrode 5.

Japanese Patent Application No. 2009-160489

  However, when the above-mentioned pipe is provided with a small hole, the movement of negative ions (the current of creeping discharge) is not stable, resulting in variations in the removal of charged charges. In addition, the fluctuation of the amount of negative ions generated increased with time.

  Therefore, an object of the present invention is to be able to remove charged charges and stably generate negative ions.

  In order to solve the above problems, in the present invention, a negative electrode supported by an insulator so that the electrode is positioned at the center of the diameter of a synthetic resin pipe that allows fluid to flow from the upstream side toward the downstream side, and the negative electrode On the other hand, a construction comprising a plus electrode penetrating the wall surface of the pipe and exposing the tip from the inner wall of the pipe to neutralize the surrounding charge is adopted.

  By adopting such a configuration, the brass electrode exposed from the inner wall of the pipe neutralizes and removes the charging of the pipe around the electrode. For this reason, generation | occurrence | production of the negative ion from a negative electrode is not prevented by charging.

  Also, at this time, a high voltage power source is provided that forms a junction at both ends of the pipe provided with the negative electrode and the positive electrode of the ion generator and applies a voltage for generating ions to the positive electrode and the negative electrode. It is possible to employ a configuration in which the pipe is attached to a pipe in the middle of connecting the aeration pump and the diffuser pipe at the joint of the pipe.

  By adopting such a configuration, for example, if the ion generator is attached to a portion of the piping facing the treatment tank, the distance from the attached ion generator to the treatment tank can be shortened. Therefore, the period from generation of negative ions to the treatment tank can be shortened and the period of exposure to charged piping can be shortened, so that the decrease in negative ions supplied to the treatment tank can be reduced.

  Since the present invention is configured as described above, negative ions charged in the pipe can be removed and negative ions can be generated.

Schematic diagram of the embodiment Circuit block diagram of the embodiment Schematic diagram of Example 2 Action explanatory drawing of Example 2 Action explanatory drawing of Example 3 Action explanatory drawing of Example 3 Action explanatory diagram of conventional example Schematic diagram of conventional ion generator (A) Operation explanatory diagram of the conventional example, (b) Operation explanatory diagram of the conventional example, (c) Operation explanatory diagram of the conventional example, (d) Operation explanatory diagram of the conventional example

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
As shown in the schematic diagram of FIG. 1, the ion generator 20 of this embodiment includes, for example, a pipe (synthetic resin: made of vinyl chloride) 8 connected to the blower pump 1 and a negative electrode 4 from upstream to downstream. A positive electrode 5 is provided.
The negative electrode 4 is a brush or needle-like electrode, and is supported by an insulator 21 so as to be positioned at the center of the diameter of the pipe 8. Further, the tip of the electrode 4 is directed downstream as shown in FIG.

On the other hand, the downstream positive electrode 5 passes through the pipe 8 and has its tip exposed from the inner wall of the pipe 8. The tip of this electrode may be a thin point like a pin, for example, but in this embodiment, the electrode 5 is screwed into a small hole provided in the pipe 8 as shown in FIG. It is replaced with. Therefore, it is possible to adjust the degree of neutralization according to the charge amount by adjusting the exposure amount at the tip by screwing.
Reference numeral 22 denotes a washer-cumbent terminal provided with a binding hole. By wiring to the binding hole, a connection between a “screw” and a high voltage circuit 25 described later can be easily and reliably performed. It is.

The high voltage circuit 25 is for applying a discharge voltage to the minus electrode 4 and the plus electrode 5 and is composed of an inverter circuit 26 and a voltage doubler rectifier circuit 27 as shown in FIG. A circuit 28 is connected.
The inverter circuit 26 is a self-excited type using transistors as shown in FIG. 2, and adjusts the oscillation frequency by changing the feedback amount of the base circuit. Here, the oscillation frequency is set to about 25 kHz.
The rectifier circuit 28 employs a half-wave rectifier circuit, and is designed to directly input AC 100V.
In this embodiment, the voltage doubler circuit 27 is a triple voltage circuit, and can output a voltage of about −3 KV to −20 KV.

This configuration is configured as described above, and when the blower pump 1 is operated and air flows from the upstream side to the downstream side of the pipe 8 as indicated by the arrows in FIG. -"Charge to potential. In this state, a high voltage circuit is connected between the negative electrode 4 and the positive electrode 5 to apply a voltage.
Incidentally, here, the positive electrode 5 is applied with 0 V, and the negative electrode 4 with −3 to −20 KV.
Then, around the positive electrode 5, the applied “+” voltage (with respect to the negative electrode) neutralizes the charge of “−” as shown in FIG. You may adjust the amount).
On the other hand, the negative electrode 4 generates negative ions at the applied voltage. The generated negative ions are attracted to the downstream positive electrode 5. This is because the periphery of the plus electrode 5 is neutralized to generate a potential difference.
At this time, the negative ions leaving the negative electrode 4 float in the pipe 8. At this time, most of the floating negative ions are carried downstream by the air blown from the blower pump 1 and released.
Moreover, since the remainder is neutralized by the plus electrode 5, it does not stay between the minus electrode 4 and the plus electrode 5 and does not inhibit the generation of minus ions.
Thus, since the charge of the pipe 8 can be removed, a large amount of negative ions can be generated.

In Example 1, the negative electrode 4 and the positive electrode 5 were considered.
That is, in order to investigate the relationship between the inner diameter of the pipe 8 and the distance between the electrodes 4 and 5, when the inner diameter of the pipe 8 is 13 mm and more than 20 mm, the inter-electrode distance (symbol A in FIG. 1) is 8 mm to 35 mm. The amount of negative ions generated at that time was measured by arranging a negative ion measuring device in the opening on the downstream side of the pipe 8.
Further, in order to investigate the relationship between the number of positive electrodes (screws) 5 and the number of negative ions generated, the amount of negative ions generated was measured in the same manner as before when the number of positive electrodes 5 was 1 to 4. . At that time, the positive electrode (screw) 5 having a different diameter was used, and the relationship between the diameter and the number was also examined. The results were as follows.

1. When the inner diameter of the pipe 8 is 13 mm (13φ), the number of negative ions is 1.32 million / cc or more when the distance between the electrodes 4 and 5 is between 8 mm and 35 mm (the measurement limit of the ion measuring instrument is 1, Was 236,000 / cc), and good results were obtained. At that time, the number of positive electrodes 5 was sufficient.
2. When the inner diameter of the pipe 8 is more than 20 mm (20φ), when the number of the plus electrodes (screws) 5 is 2 or more, the distance between the electrodes 4 and 5 is 1.32 million pieces / cc or more between 8 mm and 35 mm. Was able to be measured, and good results were obtained.
3. When the diameter of the positive electrode (screw) 5 is 2.6 mm (2.6 φ) or more, negative ions of about 1.23 million / cc can be detected, and good results are obtained.
Moreover, when the diameter of the plus electrode (screw) 5 was 1.0 mm (1.0φ), the generation of minus ions was unstable. At this time, when the number of the positive electrodes 5 is four, about 1.32 million negative ions / cc can be detected and a good result is obtained.
From the above results, it was found that the total length of contact between the inner diameter surface of the pipe 8 and the positive electrode (screw) 5 having a positive potential (0 V) potential is required to be about 8 mm or more.

This Example 2 shows what incorporated the ion generator 20 of this invention in the housing | casing of the purification apparatus for aeration like FIG. In this case, the ion generator 20 is provided in the pipe 8 that connects the blower pump 1 and the discharge port 3 in the housing.
That is, as shown in FIG. 4, a pipe 8 connecting the blower pump 1 and the discharge port 3 is used, and a negative electrode 4 and a positive electrode 5 are provided therein, and the electrodes 4 and 5 are covered with a case. It has become. In the case of this embodiment, the high voltage circuit 25 is provided in the housing as shown in FIG. 3, but the present invention is not limited to this. For example, it is obvious that the electrodes 4 and 5 may be provided in a case containing the electrodes.

The third embodiment shows a modular ion generator 20 'as shown in FIG.
This ion generator 20 'is a waterproof structure in which the ion generator 20 and the high voltage circuit 25 are packaged with resin.
That is, the box-shaped package has a shape in which the pipe 8 protrudes to the left and right, and a joint portion 30 is formed at the end of the protruding pipe 8 so that the pipe 7 from the aeration air pump 1 to the treatment tank 6 is formed. Can be connected to.
Therefore, for example, as shown in FIG. 6, if it is arranged in front of the processing tank 6, the distance to the processing tank 6 is shortened, so that there is an advantage that negative ions lost due to charging or the like can be reduced.

DESCRIPTION OF SYMBOLS 1 Air blow pump 4 Negative electrode 5 Positive electrode 7 Piping 8 Pipe 20 Ion generator 20 'ion generator 25 High voltage circuit 26 Inverter circuit 27 Voltage doubler circuit 28 Rectifier circuit 30 Joint part

Claims (2)

  A negative electrode (4) supported by an insulator so that the electrode is positioned at the center of the diameter of the synthetic resin pipe (8) through which fluid flows from the upstream side to the downstream side, and downstream of the negative electrode (4) An ion generator (20) comprising a plus electrode (5) penetrating the wall surface of the pipe (8) and exposing the tip from the inner wall of the pipe (8) to neutralize the surrounding charge.   A junction (30) is formed at both ends of the pipe (8) provided with the negative electrode (4) and the positive electrode (5) of the ion generator (20) according to claim 1, and the positive electrode (5 ) And a negative electrode (4), and a high voltage power source (25) for applying a voltage for generating ions to the treatment tank (6) from the aeration pump (1) at the junction (30) of the pipe (8). An ion generator that can be attached in the middle of the pipe (7).

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