JP2006213533A - Ozone generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ozone generating device which can prevent breakage of a substrate or the like at the time of assembling and generate uniform and high concentration ozone stably. <P>SOLUTION: The ozone generating device is equipped with a conductive plate 14, a discharge electrode 18 arranged on the conductive plate 14 through an insulative substrate 16; a frame body 20 arranged on the conductive plate 14 so as to surround the periphery of the discharge electrode 18; a cap body 24 formed of a transparent plate material, which is arranged on the frame body 20 and forms a discharge area 22 on a face of the discharge electrode 18; a gas feeding nozzle 28 which is arranged at the inner peripheral side of the frame body 20 and feeds oxygen into the discharge area 22; an exhaust nozzle 30 which is arranged at the inner peripheral side of the frame body 20 between the cap body 24 and the conductive plate 14 and discharges ozone from the discharge area 22 to a prescribed outside area; an electrode pin 42 arranged on the insulative substrate 16 in the discharge area 22; and a tightening member 50 for tightly fixing the conductive plate 14, the frame body 20 and the cap body 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ozone generator used for an ozone gas generation source such as an ozone water generator.

Conventionally, ozone gas has been widely used in sterilizers, deodorizers, bleachers, water purifiers, and the like.
In order to generate ozone gas, there is a method in which oxygen is ozonized by using a discharge electrode of a discharge device and supplying oxygen gas so as to pass through a discharge beam in a discharge region provided with the discharge electrode. Yes (see, for example, Patent Document 1). At this time, if oxygen gas having an appropriate concentration is supplied so as to pass through the discharge beam over a certain period of time, the oxygen gas can be favorably ozonized.
JP-A-8-283005

Here, the conventional ozone generator has the following problems to be solved.
In the above apparatus, when the concentration or flow rate of oxygen gas is excessive, gas that is not sufficiently ozonized is discharged. However, it is not easy to adjust the flow rate so that an oxygen gas having an appropriate concentration passes through the discharge beam over a certain period of time.

  On the other hand, when applying a high voltage to a flat plate electrode formed in a knitted pattern on the surface of a ceramic insulating substrate, the inventor forms a stable discharge beam in a wide area immediately above the electrode, and the discharge beam is uniformly distributed in the discharge beam. It has been found that ozone can be efficiently generated by controlling the oxygen gas to flow through.

  The present invention has been made by paying attention to the above points, and an object of the present invention is to provide an ozone generation apparatus capable of stably generating uniform and high-concentration ozone.

In the embodiments of the present invention, the above-described problems are solved by the following configurations.
<Configuration 1>
A conductor plate; a flat discharge electrode disposed on the conductor plate via an insulating substrate; a frame disposed on the conductor plate so as to surround the periphery of the discharge electrode; and Arranged on the inner peripheral side of the frame body between the lid body and the conductor plate, and a lid body made of a transparent plate material that forms a flat discharge region on one surface of the discharge electrode, And an air supply nozzle connected to the oxygen generator for sending oxygen into the discharge region, and disposed between the lid and the conductor plate on the inner peripheral side of the frame, and in the discharge region An exhaust nozzle that discharges ozone generated in the discharge region toward a predetermined external region, an electrode pin disposed so as to contact the discharge electrode in the discharge region, the conductor plate, and the frame Fastening the body and the lid tightly Only ozone generation apparatus characterized by comprising a member.

  During use, heat rays from the discharge beam are radiated from the entire discharge region to the outside through the transparent lid. Therefore, there is an effect that the cooling effect is remarkably enhanced as compared with the case where an opaque lid is provided. Also, the discharge state can be seen through from the outside, and the soundness can be easily checked. Also, when overlaying the frame or lid on the conductor plate, the assembly work can be done while seeing the discharge electrode on the conductor plate through the lid made of a transparent plate material, so that the insulating substrate, the discharge electrode, etc. There is also an effect of improving workability that can prevent damage due to collision of parts. In addition, when condensation occurs in the discharge region, the discharge becomes unstable, but since the lid is transparent, it can be confirmed whether condensation has occurred inside. Since the gas inlet / outlet is securely attached in a compact manner, the overall size can be sufficiently reduced.

<Configuration 2>
The ozone generator according to Configuration 1, wherein the lid is formed of a transparent glass plate.

  When the entire lid is made of a transparent glass plate, the discharge electrode is widely opened, and the cooling effect by heat radiation is maximized. In addition, when a transparent glass plate is used as the lid, the airtight discharge area can be easily obtained because of good adhesion to the frame.

<Configuration 3>
The ozone generator according to Configuration 1 or 2, wherein a protective plate is disposed on an outer edge portion of the upper surface of the lid body, and the fastening member is attached from above the protective plate. .

  By disposing the protective plate, it is possible to prevent the lid made of the transparent plate material from being damaged by the tightening force of the tightening member.

<Configuration 4>
In the ozone generating device according to any one of the configurations 1 to 3, the air supply nozzle and the exhaust nozzle are connected to the small-diameter cylindrical portion having a central hole in the axial center, the small-diameter cylindrical portion, and an outer peripheral surface. And a large-diameter cylindrical portion in which a plurality of lateral holes communicating with the central hole of the small-diameter cylindrical portion are provided radially, and the small-diameter cylindrical portion is attached so as to penetrate the lid body and be exposed to the outside. An ozone generator characterized by comprising:

Oxygen gas ejected in a radial direction from a plurality of lateral holes of the large-diameter cylindrical portion of the air supply nozzle is complicatedly flowed and stirred in the discharge region in a turbulent state. Therefore, oxygen gas flows uniformly in the flat discharge region, and uniform and high-concentration ozone can be efficiently generated.
Since each small diameter cylindrical portion of the intake nozzle and the exhaust nozzle passes through the lid and is drawn to the outside, the thickness can be freely adjusted according to the gas flow rate regardless of the size of the discharge region.

<Configuration 5>
The ozone generator according to Configuration 4, wherein an upper end surface of the large-diameter cylindrical portion is in airtight contact with the lid.

  The upper end surface of the large-diameter cylindrical portion is in airtight contact with the lid, and the airtightness in the discharge region can be maintained. In an ozone atmosphere, an adhesive cannot be used, but since the insulating substrate is hermetically abutted by the large-diameter cylindrical portions of the air supply nozzle and the exhaust nozzle, the insulating substrate can be fixed to the conductor plate without an adhesive.

<Configuration 6>
In the ozone generation device according to any one of configurations 1 to 5, the electrode pin is brought into contact with the discharge electrode through a conductor coil spring and is held by a holding body made of an ozone-resistant material. A small-diameter cylindrical portion and a large-diameter cylindrical portion connected to the small-diameter cylindrical portion, and both end surfaces of the large-diameter cylindrical portion are hermetically sealed to the lid and the insulating substrate by the tightening force of the tightening member, respectively. An ozone generator characterized by being in contact with the water.

  The electrode pin and the conductor coil spring are protected from corrosion by ozone by the holding body, and both end faces of the holding body are in airtight contact with the lid and the insulating substrate, respectively, so that the airtightness in the discharge region is maintained. .

<Configuration 7>
7. The ozone generator according to any one of configurations 1 to 6, wherein a heat sink is disposed on the lower surface of the conductor plate.

  The heat dissipation effect is good, and the overall configuration can be reduced in size.

<Configuration 8>
In the ozone generator according to any one of configurations 1 to 7, the lid body is made of glass, the conductor plate is made of stainless steel, the insulating substrate is made of ceramic, the frame body, the air supply The ozone generator according to claim 1, wherein the nozzle, the exhaust nozzle, and the holder are each made of an ozone-resistant resin.

  Hereinafter, embodiments of the present invention will be described in detail.

FIG. 1 is a perspective view showing an ozone generator of Example 1. FIG. FIG. 2 is an exploded view showing the apparatus.
1 and 2, the ozone generator 12 of Example 1 includes a conductor plate 14, a discharge electrode 18 disposed on the conductor plate 14 via an insulating substrate 16, and a discharge electrode 18 on the conductor plate 14. Of the frame body 20 between the lid body 24 and the conductor plate 14, the lid body 24 made of a transparent glass plate, and the lid body 24 disposed on the frame body 20. An air supply nozzle 28 and an exhaust nozzle 30 disposed on the inner peripheral side, an electrode pin 42 disposed so as to be in contact with the discharge electrode 18 in the discharge region 22, the conductor plate 14, the frame body 20, and the lid body And a tightening member 50 such as a tightening bolt for tightly fixing 24.

  An oxygen generator 54 is connected to the air supply nozzle 28. An ozone water generator 56 is connected to the exhaust nozzle 30. A heat sink 52 is disposed below the conductor plate 14 to improve the heat dissipation effect. A large number of through holes 27A, 27B, 27C, 27D, and 27E through which the fastening bolts 50 are passed are provided on the peripheral edges of the heat sink 52, the conductor plate 14, the frame body 20, the lid body 22, and the protection plate 26, respectively. These through holes 27A, 27B, 27C, 27D, and 27E are provided corresponding to the upper and lower portions of each component.

  The conductor plate 14 is formed of a stainless steel, which is an ozone resistant material, on a flat plate having a thickness of about 10 mm. The insulating substrate 16 is made of a ceramic plate having a thickness of about 1 mm. The frame 20 is made of ozone-resistant PTFA (polytetrafluoroethylene) and has a height of about 4 mm and is formed in a quadrangular shape surrounding the discharge electrode 18.

  The lid 24 is made of a glass plate having a thickness of about 5 mm or an ozone-resistant transparent resin plate, and has an area where the entire discharge electrode 18 can be seen through from the outside. The lid 24 is disposed at a position below the maximum height of the discharge beam generated by the discharge electrode 18. Through holes 32 A and 32 B for attaching the air supply nozzle 28 and the exhaust nozzle 30 and through holes 32 C for attaching the electrode pins 42 are provided at predetermined positions of the lid 24. Since the entire discharge electrode 18 has an area that can be seen through from the outside, the heat rays generated on the surface of the discharge electrode 18 are emitted to the outside without being reflected by the lid 24. Considering the effect of heat dissipation, the area of the transparent portion of the lid body 24 is preferably at least the area of the surface of the discharge electrode 18.

  The discharge electrode 18 is made of a mesh-like electric good conductor formed by etching or sputtering, and is formed by being fitted into a ceramic insulating substrate 16. A discharge region 22 forming a flat space having a height of about 1 to 2 mm is formed above the discharge electrode 18 disposed on the upper surface of the conductor plate 14 via the insulating substrate 16. The discharge region 22 is formed of an insulating substrate 16 that supports the discharge electrode 18, a frame body 20 that surrounds the periphery of the discharge electrode 18, and a lid body 24 that closes the upper surface of the frame body 20. The height of the frame 20 forms the height of the discharge region 22. The protection plate 26 is made of a stainless steel plate having a thickness of about 1 mm and is formed in a U shape. Two U-shaped pieces are used in an opposed arrangement.

FIG. 3 is a perspective view showing an arrangement state of the air supply nozzle 28, the exhaust nozzle 30, and the electrode pin 42 on the conductor plate 14.
As shown in FIG. 3, the insulating substrate 16 and the discharge electrode 18 are disposed at substantially the center of the conductor plate 14. The supply nozzle 28 and the exhaust nozzle 30 are arranged on both sides of the discharge electrode 18 on the insulating substrate 16 and protrude upward. The electrode pin 42 is disposed at a corner portion of the discharge electrode 18 and protrudes upward.

FIG. 4 is a perspective view showing the air supply nozzle 28 or the exhaust nozzle 30, and FIG. 5 is a longitudinal sectional view showing how the nozzle is attached.
The supply nozzle 28 and the exhaust nozzle 30 have the same configuration. That is, as shown in FIG. 4, the air supply nozzle 28 or the exhaust nozzle 30 is formed by forming a small-diameter cylindrical portion 36A and a large-diameter cylindrical portion 36B connected to the small-diameter cylindrical portion 36A by PTFA. A central hole 34 is provided in the axial center of the small diameter cylindrical portion 36A. A plurality of lateral holes 40 communicating with the center hole 34 of the small diameter cylindrical portion 36A are provided radially on the outer peripheral surface of the large diameter cylindrical portion 36B. The lateral holes are not necessarily arranged at equal intervals in the entire circumferential direction. It suffices that an appropriate number is provided radially.

The supply nozzle 28 and the exhaust nozzle 30 are attached as shown in FIG.
That is, the air supply nozzle 28 has a large-diameter cylindrical portion 36 </ b> B disposed on the insulating substrate 16 in the discharge region 22, and a small-diameter cylindrical portion 36 </ b> A fitted in the through hole 32 </ b> A (FIG. 2) of the lid body 24. The exhaust nozzle 30 has a large-diameter cylindrical portion 36 </ b> B disposed on the insulating substrate 16 in the discharge region 22, and a small-diameter cylindrical portion 36 </ b> A is fitted in the through hole 32 </ b> B (FIG. 2) of the lid body 24.

The upper end surface of each large-diameter cylindrical portion 36 </ b> A or 36 </ b> B of the air supply nozzle 28 or the exhaust nozzle 30 is in airtight contact with the lid body 24 by the tightening force of the tightening member 50.
In an ozone atmosphere, an adhesive cannot be used. However, since the insulating substrate 16 is hermetically abutted by the large-diameter cylindrical portions 36A or 36B of the air supply nozzle 28 or the exhaust nozzle 30, the conductor plate can be used without an adhesive. 14 is fixed. Thereby, the surroundings of the air supply nozzle 28 and the exhaust nozzle 30 can be kept sufficiently airtight. In addition, there is an effect that the assembly process becomes very simple.

FIG. 6 is a perspective view showing the electrode pin 42, and FIG. 7 is a longitudinal sectional view showing a state of attachment of the electrode pin 42.
As shown in FIGS. 6 and 7, the electrode pin 42 is formed by connecting a T-shaped conductor rod 43 and a conductor coil spring 48 with a holder 44 made of PTFA. One end of the conductor coil spring 48 is in contact with the discharge electrode 18, and the other end constantly presses the lower end portion 43 </ b> A of the conductor rod 43 against the holding body 44 with a spring force. The holding body 44 includes a small diameter cylindrical portion 44A and a large diameter cylindrical portion 44B connected to the small diameter cylindrical portion.

  The height of the large diameter cylindrical portion 44B is substantially the same as the height of the large diameter cylindrical portion 36B of the air supply nozzle 28, and constitutes the height of the discharge region 22. Further, both end surfaces of the large-diameter cylindrical portion 44B of the holding body 44 are in airtight contact with the lid body 24 and the discharge electrode 18 by the tightening force of the tightening member 50, respectively. Accordingly, airtightness in the discharge region is maintained, and the conductor rod 43 and the conductor coil spring 48 of the electrode pin 42 are protected from corrosion by ozone by the holding body 44.

The heat sink 52, the conductor plate 14, the insulating substrate 16, the discharge electrode 18, the frame body 20, the lid body 22, and the protection plate 26 are provided in a large number of through holes 27 </ b> A, 27 </ b> B, 27 </ b> C, 27 </ b> D, 27 </ b> E provided on the periphery of each part. It is fixed integrally by tightening it through the tightening bolt 50. By this tightening force, the contact surface of each component is sealed and the airtightness in the discharge region 22 is also maintained. When the lid body 24 is made of glass, the glass breakage can be prevented by being tightened via the protective plate 26.
As the tightening member 50, it is desirable to use a tightening bolt. However, the tightening member 50 is not limited to the tightening bolt as long as it can fix and fix each component.

  The electrode pin 42 is in electrical contact with the lower end of a terminal (not shown) connected to the positive electrode of the high voltage power source. The conductor plate 14 is connected to the negative electrode of the high voltage power source. Thus, corona discharge is generated in the space above the discharge electrode 18. A heat sink 52 attached to the lower surface of the conductor plate 14 suppresses temperature rise due to discharge. Water cooling or air cooling may be used.

  Oxygen supplied from the air supply nozzle 28 enters the discharge region 22 through the lateral hole 40, passes over the insulating substrate 16, and reaches the exhaust nozzle 30. At this time, if corona discharge is generated by the discharge electrode 18 on the insulating substrate 16 over almost the entire discharge region 22, oxygen passing through the discharge region 22 is efficiently ozonized.

FIG. 8 is an explanatory diagram showing the gas flow in the discharge region of the existing ozone generator, and FIG. 9 is an explanatory diagram showing the gas flow in the discharge region of the device according to the present invention.
As shown in FIG. 8, when the air supply nozzle 58 and the exhaust nozzle 60 are arranged linearly opposite to the discharge region 22, the flow 62 of oxygen gas delivered from the air supply nozzle 58 is exhausted. It becomes a laminar flow toward the nozzle 60. This flow 62 does not spread sufficiently and the time for passing through the discharge beam in the discharge region 22 is shortened. For this reason, in the discharge region 22, a thick portion and a thin portion of oxygen gas are formed.

  In contrast, in the present invention, as shown in FIG. 9, oxygen gas is ejected in a radial direction from a plurality of lateral holes of the large-diameter cylindrical portion of the air supply nozzle 28, so that oxygen gas is Turbulence is generated in the flow 62. Oxygen gas flows in a complicated manner inside the discharge region 22 due to the generation of turbulent flow, and is agitated as a whole. That is, oxygen gas flows uniformly in the flat space from the intake nozzle 28 toward the exhaust nozzle 30. Therefore, oxygen gas flows uniformly in the flat discharge region 22, and ozone can be generated efficiently.

  Moreover, by setting it as the structure of this invention, the heat ray by the discharge beam in the discharge area 22 is radiated | emitted outside through the cover body 24 of transparent glass, and a cooling effect increases. The efficiency is improved as compared with the case where the opaque lid 24 is used. Further, if the lid body 24 is transparent, the assembly work can be performed on the ceramic insulating substrate 16 while visually observing the frame body 20 when the lid body 24 is disposed at a predetermined position. It is possible to prevent the problem and improve workability.

  According to the experiment, the ozone generator according to the present invention is used in comparison with the existing ozone generator using the opaque lid 24 and supplying oxygen gas from the side wall toward the opposite side wall as shown in FIG. Then, it turned out that the ozone yield increased by 17 points.

1 is a perspective view showing an ozone generator of Example 1. FIG. FIG. The perspective view which shows the arrangement | positioning condition of the supply nozzle of this apparatus, an exhaust nozzle, and an electrode pin. The perspective view which shows the air supply nozzle or exhaust nozzle of the apparatus. The longitudinal cross-sectional view which shows the attachment condition of the nozzle. The perspective view which shows the electrode pin of the apparatus. The longitudinal cross-sectional view which shows the attachment condition of the electrode pin. Explanatory drawing which shows the flow of the gas in the discharge area | region of the existing ozone production | generation apparatus. Explanatory drawing which shows the flow of the gas in the discharge region of the apparatus by this invention.

Explanation of symbols

14 Conductor plate 16 Insulating substrate 18 Discharge electrode 20 Frame 22 Discharge area 24 Lid 26 Protection plate 27A thru 27E Through hole 28 Air supply nozzle 30 Exhaust nozzle 32A thru 32C Through hole 34 Center hole 36A Small diameter cylindrical part 36B Large diameter cylindrical part 40 Horizontal hole 42 Electrode pin 50 Tightening member 52 Heat sink 54 Oxygen generator 56 Ozone water generator

Claims (8)

A conductor plate;
On the conductor plate, a flat discharge electrode disposed via an insulating substrate,
A frame disposed on the conductor plate so as to surround the discharge electrode;
A lid made of a transparent plate, which is disposed on the frame and forms a flat discharge region on one surface of the discharge electrode;
An air supply nozzle disposed between the lid and the conductor plate on the inner peripheral side of the frame and connected to an oxygen generator to send oxygen into the discharge region;
Exhaust gas that is disposed on the inner peripheral side of the frame body between the lid and the conductor plate and that discharges ozone generated in the discharge region from the discharge region toward a predetermined external region. A nozzle,
An electrode pin arranged to contact the discharge electrode in the discharge region;
An ozone generating apparatus comprising: a tightening member that tightly fixes the conductor plate, the frame, and the lid. The ozone generator according to claim 1,
An ozone generating apparatus, wherein the lid is made of a transparent glass plate. The ozone generator according to claim 1 or 2,
An ozone generating device, wherein a protective plate is disposed on an outer edge portion of the upper surface of the lid, and the fastening member is mounted on the protective plate. The ozone generator according to any one of claims 1 to 3,
The air supply nozzle and the exhaust nozzle have a small-diameter cylindrical portion having a central hole provided in the center, and a plurality of horizontal holes that are continuous with the small-diameter cylindrical portion and communicate with the central hole of the small-diameter cylindrical portion on the outer peripheral surface. The ozone generator is characterized by comprising a large-diameter cylindrical portion provided radially, and the small-diameter cylindrical portion is attached so as to penetrate the lid and be exposed to the outside. The ozone generator of Claim 4 WHEREIN:
An ozone generating apparatus, wherein an upper end surface of the large-diameter cylindrical portion is in airtight contact with the lid. The ozone generator according to any one of claims 1 to 5,
The electrode pin is brought into contact with the discharge electrode via a conductor coil spring and is held by a holder made of an ozone-resistant material,
The holding body includes a small-diameter cylindrical portion and a large-diameter cylindrical portion connected to the small-diameter cylindrical portion, and both end surfaces of the large-diameter cylindrical portion are respectively attached to the lid body and the fastening member by the tightening force of the tightening member. An ozone generator characterized by being in airtight contact with an insulating substrate. The ozone generator according to any one of claims 1 to 6,
An ozone generator, wherein a heat sink is disposed on the lower surface of the conductor plate. The ozone generator according to any one of claims 1 to 7,
The lid is made of glass,
The conductor plate is made of stainless steel,
The insulating substrate is made of ceramic,
The frame body, the air supply nozzle, the exhaust nozzle, and the holding body are each made of an ozone-resistant resin.

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