JPH0517101A - Ozonizer and ozone-supplier - Google Patents

Abstract

PURPOSE:To enable make-up of an ozonizer without using an expensive glass or ceramics. CONSTITUTION:Tubes 1A and 1B made of a flexible insulating resin such as PTFE are used as the dielectric units. An induction electrode 3 is formed in a state where the induction electrode 3 covers the outer peripheral surface of the tubes 1A and 1B. A discharge electrode 4 is inserted into the inside of the tube so that the discharge electrode 4 may be faced to the induction electrode 3 through the tube. The tubes 1A, 1B and an electric wire 5 are connected to a joint 2 made of an insulating resin and the electric wire 5 is electrically connected to the discharge electrode 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozonizer for generating ozone by converting ozone contained in a raw material gas into ozone by high frequency discharge, and a gas containing ozone generated by the ozonizer to a place where ozone is used. The present invention relates to an ozone supply device.

[0002]

2. Description of the Related Art An ozonizer is a tube made of a dielectric material, an induction electrode formed so as to cover the outer peripheral surface of the tube, and an ozonizer provided inside the tube and opposed to the induction electrode through the tube. And a discharge electrode. In this ozonizer, a high frequency high voltage is applied between the discharge electrode and the induction electrode,
This causes a discharge along the discharge electrode. A raw material gas containing oxygen (usually air) is supplied into the pipe,
Oxygen in the raw material gas is ozoned by the discharge.

As the tube used in the ozonizer, it is necessary to use one having not only ozone resistance and arc resistance but also a sufficiently large dielectric constant. However, in the conventional ozonizer, it is made of expensive glass or ceramics. A tube was used.

Recently, ozone has been used for various purposes such as sterilization treatment, antiseptic treatment, deodorization treatment, and decolorization treatment in water purification equipment. Conventionally, ozone is used as a raw material gas supply side such as a compressor or a cylinder. The place where ozone is used is arranged through an ozonizer, and a gas containing ozone generated by the ozonizer is passed through a gas transfer path using a tube made of a material having high ozone resistance such as polytetrafluoroethylene (PTFE) as a transfer means. I was supposed to transport it to.

[0005]

The conventional ozonizer has the following problems.
Since a tube made of expensive glass or ceramics is used as the dielectric, it is unavoidable that the cost becomes high.

Conventionally, in the ozonizer, the tube for providing the induction electrode and the discharge electrode is made of a hard material.
The shape is limited to a linear elongated shape, and it is difficult to change the shape appropriately according to the space of the installation location.

Further, in the conventional ozone supply device, since the ozone gas generated by the ozonizer arranged near the source of the source gas is conveyed to the place where ozone is used through the gas conveyance path, the length of the conveyance path is long. There is a problem in that ozone generated at all is attenuated and ozone of a predetermined concentration cannot be supplied to the place of use.

It is an object of the present invention to provide an ozonizer capable of generating ozone without using expensive glass or ceramics.

Another object of the present invention is to provide various shapes of the tubes forming the induction electrode and the discharge electrode so that the space of the installation place can be variously adapted. To provide.

Another object of the present invention is to provide an ozone generator capable of supplying ozone having a sufficiently high concentration even when the length of the gas conveying path is long.

[0011]

The ozonizer of the present invention comprises:
A tubular body made of a dielectric, an induction electrode provided so as to cover the outer peripheral surface of the tubular body, a discharge electrode inserted inside the tubular body and opposed to the induction electrode through the tubular body,
By providing a power supply for applying a high frequency high voltage between the induction electrode and the discharge electrode, and causing discharge along the discharge electrode, oxygen contained in the raw material gas supplied into the tubular body is ozonized. The present invention relates to an ozonizer, and in the present invention, the tubular body is a flexible synthetic resin tube.

The ozonizer of the present invention is also made of an insulating resin joint and a flexible insulating resin, and is formed so as to cover the tube connected to the joint and a part of the outer peripheral surface of the tube. Induction electrode, a discharge electrode inserted inside the tube in which the induction electrode is formed and opposed to the induction electrode through the tube, and an electric wire connected to the joint and electrically connected to the discharge electrode It can be configured by.

In the ozone supply device according to the present invention, a tube made of an insulating resin having flexibility as a gas transfer means of a gas transfer path connecting between a gas supply source for supplying a raw material gas containing oxygen and a supply point for ozone gas. And the tube itself is used as the dielectric of the ozonizer. In this case, the induction electrode is provided so as to cover a part of the outer peripheral surface of the tube, and the discharge electrode is inserted into the tube to face the induction electrode through the tube.

In this case, a plurality of tubes made of an insulating resin having flexibility are connected to each other through a joint made of an insulating resin to form a gas carrying path, and the induction electrode of the ozonizer has an outer circumference of the tube near the joint. It may be formed so as to cover a part of the surface. The discharge electrode may be inserted into the tube and face the induction electrode through the tube. The insulation-coated electric wire for connecting the discharge electrode to the high-frequency and high-voltage power supply may be connected to the joint, and its core wire may be connected to the discharge electrode.

The material for forming the above-mentioned tube has a dielectric constant of a size required as a dielectric for an ozonizer,
Moreover, it is necessary to use an insulating resin having ozone resistance, arc resistance and heat resistance, and as such an insulating resin, for example, PTFE, PFA, FEP and the like are suitable.

Further, in order to simplify the insulating structure of the connecting portion between the discharge electrode and the insulating covered electric wire, it is preferable that the joint is also made of an insulating material having ozone resistance, for example, polytetrafluoroethylene.

[0017]

As described above, when a tube made of flexible resin is used as the tube for providing the induction electrode and the discharge electrode, the cost can be reduced as compared with the case of using expensive glass or ceramics. Further, since the pipe has flexibility, the shape of the ozonizer can be varied depending on the space of the installation location and the like.

From the viewpoint of ozone resistance, PTFE is generally used as a tube which constitutes a transfer path for transferring ozone to the place of use. This PTFE not only has high ozone resistance, but also has a dielectric constant (<2.1) sufficiently large as a dielectric for an ozonizer in the frequency range of 50 Hz to 10 ⁶ Hz. Therefore, as the above-mentioned tube, it is possible to use the tube itself which has been conventionally used for carrying ozone.

As described above, according to the present invention, since the tube itself used for carrying ozone can be used as a dielectric to construct the ozonizer, the ozonizer can be constructed easily.

Further, as described above, when the tubes are connected by the joint made of the insulating material and the electric power is supplied to the discharge electrode through the joint, it is possible to simplify the insulating structure of the power supply portion for the discharge electrode.

Further, as described above, the gas conveying path is composed of a plurality of tubes connected by a joint, an induction electrode is formed on the outer periphery of the tube in the vicinity of the joint, and a discharge electrode is inserted into the tube. By doing so, it is possible to easily configure the ozonizer in the middle of the gas transfer path, so you can form multiple ozonizers in the middle of the gas transfer path without compromising the cost and compensate for ozone attenuation during the transfer. It is possible to supply ozone with a sufficient concentration to the place where ozone is used.

[0022]

1 and 2 show an embodiment of an ozonizer of the present invention, in which 1A and 1B are PTs.
Two tubes made of FE and 2 are T-shaped three-way joints made of PTFE.

The joint 2 integrally has first and second ports 201 and 202 opened in opposite directions, and a third port 203 opened in a direction forming 90 degrees with respect to both ports 201 and 202. is doing. These ports 20
The outer circumferences of Nos. 1 to 203 are tapered so that the diameter decreases toward the opening side, and screws 204 to 206 are provided, and nuts 207 to 209 are screwed to the screws 204 to 206, respectively.

The respective ends of the tubes 1A and 1B are inserted into the first port 201 and the second port 202 of the joint 2, and the inner diameters of the ports 201 and 202 are reduced by tightening the nuts 207 and 208. The tubes 1A and 1B are hermetically connected to the joint 2.

The induction electrodes 3 are provided on the outer circumferences of the portions of the tubes 1A and 1B near the joint 2 so as to cover the respective outer peripheral surfaces.
Are formed. The induction electrode 3 may be formed by winding a conductive foil such as an aluminum foil around each tube, or may be formed by applying a conductive paint to the outer peripheral surface of each tube. When the induction electrode 3 is formed of a conductive foil, it is possible to simplify the formation of the induction electrode by using one having an adhesive applied on one surface thereof. Incidentally, although PTFE has a property that the paint is difficult to adhere as it is, it can be coated by chemically treating its surface to form a rough surface.

A discharge electrode 4 is inserted in each of the tubes 1A and 1B, and the discharge electrode is opposed to the induction electrode 3 via the tubes 1A and 1B. It is preferable that the discharge electrode 4 be in line contact with the inner peripheral surfaces of the tubes 1A and 1B,
In the illustrated example, the discharge electrode 4 is composed of a coil spring having conductivity.

The insulation-covered electric wire 5 is inserted into the third port 203 of the joint 2, and the insulation-covered electric wire 5 is hermetically connected to the third port 203 by tightening the nut 209.

When the outer diameter of the electric wire 5 is considerably smaller than the inner diameter of the port 203 of the joint, the electric wire 5 is directly connected to the port 2.
If it is inserted in 03, the electric wire cannot be hermetically connected to the port by tightening the nut 209. In such a case, another tube 6 is covered on the outer periphery of the electric wire 5 as shown in the drawing, and the electric wire 5 is connected to the port 20 through the tube 6.
3 may be inserted.

One end of the core wire 5a of the insulation-coated electric wire 5 is electrically connected to the ends of the discharge electrodes 4 and 4 in the joint 2 via the crimp terminal 7. The other end of the core wire of the electric wire 5 is connected to a non-grounded terminal of a power source 8 that generates a high frequency high voltage.

Further, one end of an electric wire 9 is connected to the induction electrode 3 by soldering or the like, and the other end of the electric wire 9 is connected to a ground side terminal of the power source 8.

In the above embodiment, the ozonizer is constituted by the tubes 1A and 1B, the joint 2, the induction electrode 3, the discharge electrode 4, and the electric wires 5 and 9. In order to assemble this ozonizer, first, the discharge electrode 3 is formed by winding a conductive foil around the outer circumference of the tubes 1A and 1B or applying a conductive paint. Next, the port 201 of the joint 2,
The ends of the discharge electrodes 4 and 4 are inserted into 202, and the ends of the discharge electrodes 4 and 4 are led out from the opening of the port 203. Connect to. Next, the discharge electrodes 4 and 4 are connected to the tube 1A,
1B, connect tubes 1A and 1B to ports 201 and 202 of joint 2, respectively, and connect electric wire 5 to port 2
Connect to 03.

When a high frequency high voltage is applied between the induction electrode 3 and the discharge electrode 4 of the above-mentioned ozonizer, silent discharge is generated along the linear portion of the discharge electrode 4. When the raw material gas (usually air or oxygen) is supplied into the tubes 1A and 1B in the state where this discharge is generated, oxygen molecules in the raw material gas come into contact with the discharge and become oxygen atoms, and these oxygen atoms are converted Reaction produces ozone.

As the tubes 1A and 1B, standard tubes having a thickness of about 1 mm can be used. Standardized fittings are available for standardized tubes, so the cost of the ozonizer can be reduced.

The high frequency AC power supply has a frequency of 1
It is preferable to use a voltage of 0 KHz and a peak-to-peak voltage value of about 7 KV. The frequency of the power supply may be higher than 10 KHz, but in order to keep the heat of the tube low,
It is preferably 10 KHz or less.

A 1 mm-thick PTFE tube was used to form an induction electrode 3 by winding an aluminum foil around the outer circumference of the tube, and a coil spring made of a stainless steel wire rod (in a linearly extended state) was formed in the tube. The total length of the discharge electrode 4 is 200 mm)
And 10 KH between the induction electrode 3 and the discharge electrode 4
When a high frequency high voltage of z, p-p7 KV was applied, ozone could be generated at a rate of 1 gr / hr using air as a raw material gas. This is equivalent to the performance when using a conventional ozonizer. As a result, it became clear that an ozonizer having sufficient performance can be constructed without using expensive glass or ceramics as a dielectric.

In the above embodiment, the discharge electrode 4 is formed of a shape memory alloy that stores the shape of a coil having an outer diameter that contacts the inner circumference of the tube, and the discharge electrode 4 is extended inside the tube. If the shape of the coil contacting the inner circumference of the tube is restored by applying heat to the discharge electrode after inserting the discharge electrode into the tube, not only can the insertion of the discharge electrode 4 be facilitated, but also the discharge electrode 4 It can be prevented from being deformed when it is inserted in the tube.

When the discharge electrode 4 is formed in a coil shape as in the above-described embodiment, the discharge electrode 4 can be easily bent together with the tube, which is advantageous in giving the ozonizer various shapes. . However, in the present invention, the shape of the discharge electrode 4 does not necessarily have to be a coil shape, and may be any shape having a linear electrode portion that causes a discharge. For example, a thin conductive plate twisted as shown in FIGS. 3A to 3C may be used.

In the above embodiment, the induction electrode and the discharge electrode are provided on both the tubes 1A and 1B connected to the joint 2 to form the ozonizer, but only one tube has the induction electrode and the discharge electrode. May be provided to configure the ozonizer. When the ozonizer is configured only on one tube, the source gas supply source can be directly connected to one port of the joint 2.

In the above embodiment, when the electric wire 9 cannot be directly connected to the induction electrode 3, the induction electrode 3
A conductive band may be wound around and the electric wire 9 may be connected to the band. Therefore, the material forming the induction electrode 3 is not limited to a material that can be soldered or brazed.

FIG. 4 shows an example of the construction of an ozone supply apparatus using the above-mentioned ozonizer. In FIG. 4, 10 is a compressor as a source gas supply source, and 11 is a source gas supplied from the compressor 10. It is a dryer that lets you. The outlet side of the dryer 11 is connected to one end of a gas transfer path 12 using a plurality of PTFE tubes 1A, 1B, 1C, ... As gas transfer means, and the other end of the gas transfer path 12 is guided to a place where ozone is used. ing. Tube 1A, 1
B, 1B, 1C are connected by joint 2, respectively,
The induction electrode 3 is formed so as to cover the outer peripheral surface of the tube near each joint 2. In addition, a discharge electrode (not shown) is inserted inside the tube provided with each induction electrode 3, and the core wire of the electric wire 5 connected to the joint 2 is electrically connected to the discharge electrode.

The ozonizers OZ1, OZ2, OZ2, and OZ2 are composed of tubes on both sides of each joint 2, an induction electrode formed on the outer circumference of the tube, and a discharge electrode inserted inside the tube.
... is configured. A high frequency high voltage is applied from the power source 8 between the discharge electrode and the induction electrode of each ozonizer.

In the ozone supply device shown in FIG. 4, since ozone can be repeatedly generated in the process of transporting the source gas to the place of use of ozone, high concentration ozone can be supplied.

In the embodiment shown in FIG. 4, the ozonizer is constructed by forming the induction electrode and the discharge electrode on the tubes on both sides of each joint, but the induction electrode and the discharge are formed on only one tube of each joint. An electrode may be provided.

In the existing ozone supply device, in the case where the gas transfer path is composed of a PTFE tube,
The present invention can be achieved by simply cutting the tube on the way, providing an induction electrode and a discharge electrode on the cut tube, connecting the tubes with a joint, and connecting an electric wire to the discharge electrode through the joint. You can configure your ozonizer.
Therefore, in the existing ozone supply device, it is possible to easily add the ozonizer according to the present invention as a booster for compensating the attenuation of ozone on the downstream side of the gas transfer path.

In the above embodiment, the compressor (pump) is used as the source gas supply source, but a gas cylinder may be used as the source gas supply source.

[0046]

As described above, according to the present invention, since a tube made of a resin having flexibility is used as the tube for providing the induction electrode and the discharge electrode, it is possible to compare with the case of using expensive glass or ceramics. There is an advantage that the cost can be reduced. Further, since the pipe has flexibility, the shape of the ozonizer can be varied depending on the space of the installation location and the like.

Further, according to the present invention, since the tubes are connected by the joint made of the insulating material and the electric power is supplied to the discharge electrode through the joint, the insulating structure of the electric power feeding portion to the discharge electrode can be simplified. The structure of the ozonizer can be simplified.

Further, in the ozone supply apparatus of the present invention, a plurality of tubes connected by a joint constitutes a gas carrying path, an induction electrode is formed on the outer periphery of the tube in the vicinity of the joint, and a discharge electrode is formed in the tube. Since the structure is for insertion, the ozonizer can be easily configured in the middle of the gas transfer path. Therefore, there is an advantage that a plurality of ozonizers can be provided in the middle of the gas transfer path to compensate for the attenuation of ozone during the transfer without increasing the cost.

[Brief description of drawings]

FIG. 1 is a front view showing a partial cross section of an essential part of an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the embodiment shown in FIG.

3A to 3C show modified examples of the discharge electrode used in the present invention. FIG. 3A is a left side view, FIG. 3B is a front view, and FIG. 3C is a right side view. is there.

FIG. 4 is a schematic configuration diagram showing an embodiment of an ozone supply device of the present invention.

[Explanation of symbols]

1A, 1B, 1C ... Tube, 2 ... Joint, 3 ... Induction electrode, 4 ... Discharge electrode, 5 ... Insulation coated electric wire, 8 ... Power supply, 10
... compressor, 11 ... dryer.

Claims (6)

[Claims] 1. A tubular body made of a dielectric material, an induction electrode provided so as to cover an outer peripheral surface of the tubular body, and inserted into the tubular body so as to face the induction electrode via the tubular body. The discharge electrode, and a power source for applying a high-frequency high voltage between the induction electrode and the discharge electrode, and by causing discharge along the discharge electrode, the source gas supplied into the tubular body An ozonizer for ozone-converting oxygen contained therein, wherein the tubular body is made of a flexible synthetic resin tube. 2. A tube made of an insulating resin having flexibility and an electric wire are connected to an insulating resin joint, an induction electrode is formed so as to cover a part of an outer peripheral surface of the tube, and the induction electrode is formed. An ozonizer characterized in that a discharge electrode is inserted inside the formed tube, the discharge electrode and the induction electrode are opposed to each other via the tube, and the electric wire is electrically connected to the discharge electrode. 3. The tube according to claim 1, wherein the tube is made of polytetrafluoroethylene.
Ozonizer described in. 4. A gas carrier path connecting a gas supply source for supplying a raw material gas containing oxygen and a supply point of ozone gas is provided, and an induction electrode and a discharge electrode are provided with a dielectric in the middle of the gas carrier path. In an ozone supply device provided with an ozonizer opposed to each other, a tube made of an insulating resin having flexibility is used as a gas transfer means of the gas transfer path, and the induction electrode is a part of an outer peripheral surface of the tube. The ozone supply device is provided so as to cover, the discharge electrode is inserted into the tube and is opposed to the induction electrode through the tube, and the tube itself is used as the dielectric. . 5. A discharge electrode and an induction electrode are provided in the middle of a gas transfer path, one end of which is connected to a gas supply source for supplying a source gas containing oxygen, and the other end of which is provided so as to reach a supply location of ozone gas. In an ozone supply device provided with an ozonizer opposed to each other via a body, the gas transfer path is formed by connecting a plurality of tubes made of an insulating resin having flexibility through a joint made of an insulating resin. The induction electrode is provided so as to cover a part of the outer peripheral surface of the tube in the vicinity of the joint, the discharge electrode is inserted into the tube and is opposed to the induction electrode through the tube, In addition, an insulation-coated electric wire is connected to connect the discharge electrode to a high-frequency high-voltage power supply, a core wire of the insulation-coated electric wire is connected to the discharge electrode, and the tube itself is Ozone supply device, characterized in that is used as collector. 6. The ozone supply device according to claim 4, wherein the tube is made of polytetrafluoroethylene.