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WO2008004433A1 - Dispositif de génération d'ozone - Google Patents

Dispositif de génération d'ozone Download PDF

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Publication number
WO2008004433A1
WO2008004433A1 PCT/JP2007/062240 JP2007062240W WO2008004433A1 WO 2008004433 A1 WO2008004433 A1 WO 2008004433A1 JP 2007062240 W JP2007062240 W JP 2007062240W WO 2008004433 A1 WO2008004433 A1 WO 2008004433A1
Authority
WO
WIPO (PCT)
Prior art keywords
ozone generator
discharge electrode
inductance
frequency noise
ozone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2007/062240
Other languages
English (en)
Japanese (ja)
Inventor
Masaru Nakanishi
Masaki Nieda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ohnit Co Ltd
Original Assignee
Ohnit Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ohnit Co Ltd filed Critical Ohnit Co Ltd
Publication of WO2008004433A1 publication Critical patent/WO2008004433A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/10—Preparation of ozone
    • C01B13/11—Preparation of ozone by electric discharge
    • C01B13/115—Preparation of ozone by electric discharge characterised by the electrical circuits producing the electrical discharge

Definitions

  • the present invention relates to an ozone generator that reduces high-frequency noise (several hundred MHz to several GHz) generated by silent discharge.
  • An ozone generator generates silent discharge by applying an alternating high voltage to a discharge electrode, and ionizes a raw material gas (oxygen or air containing oxygen) by the silent discharge to generate ozone.
  • the silent discharge is a large number of minute pulse discharges that repeatedly generate and disappear in a short time (2n Sec or less).
  • the minute pulse discharge generates a high-frequency current, and radiates high-frequency noise (several hundred MHz to several GHz) using a connection line for applying a high voltage to the ozone generator as an antenna.
  • This high-frequency noise is in the frequency band used for mobile phones and wireless LANs, for example, reducing the quality of mobile phone calls. Therefore, when using ozone generators, measures against high frequency noise are required.
  • the simplest countermeasure against high frequency noise is a method in which an ozone generator is surrounded by an electromagnetic shield.
  • a large industrial ozone generator has a configuration in which a raw material gas is supplied to an ozone generator through a metal pipe and the generated ozone is separately released through the metal pipe. For this reason, it is easy to enclose only the compartment where the ozone generator is placed with an electromagnetic shield, and the increase in manufacturing cost due to the addition of the electromagnetic seal is not a problem.
  • small-sized ozone generators for consumer use are aimed at miniaturization and low cost, it is usual to have a configuration in which ambient air is directly brought into contact with an ozone generator as raw material gas to generate ozone. It is. From this, it is not desirable to surround the ozone generator with an electromagnetic shield, and the increase in manufacturing cost due to the addition of the electromagnetic shield cannot be ignored, so it is not practical.
  • connection line As an easy countermeasure against high-frequency noise, it is conceivable to use a coaxial cable or a twisted pair cable that hardly emits high-frequency noise as a connection line.
  • one end of the connection line is not grounded, even if it is a coaxial cable or twisted pair cable. Difficult to reduce wave noise radiation.
  • the high-frequency current flows back to the drive circuit, and there is a possibility that high-frequency noise is emitted from the drive circuit side.
  • the applied voltage which is a high voltage, deteriorates the coating of the coaxial cable over time, causing current leakage due to dielectric breakdown.
  • Patent Document 1 forms a capacitor from the relationship between the discharge electrode and the dielectric electrode by forming a discharge electrode on a dielectric substrate and providing the dielectric electrode with respect to the discharge electrode.
  • the capacitor composed of the discharge electrode and the dielectric electrode has an impedance for a high-frequency current of a small applied voltage of several pF, which is relatively small compared to the resistance, so that the high-frequency current is consumed by the resistor.
  • Patent Document 1 Japanese Patent No. 3339590 ([Claim 1], [0010], [0019])
  • the resistance that can withstand an applied voltage that normally reaches several kV is special, and as described above, it is not practical to use in an ozone generator aiming at miniaturization and cost reduction. . Therefore, prevent high-frequency current generated at the discharge electrode from flowing into the connection line.
  • an ozone generator that does not decrease the ozone generation amount by reducing the influence of the applied voltage by preventing the high-frequency current from flowing into the connection line while reducing the emission of high-frequency noise from the connection line. Considered to develop.
  • a device developed as a result of the study was developed by applying a high voltage from the drive circuit to the discharge electrode and generating ozone by silent discharge of the discharge electrode, and then inducting an inductance at the connection terminal of the discharge electrode.
  • an ozone generator in which a connection line extending from the drive circuit cable is connected to the discharge electrode via the inductance.
  • a coil can be cited.
  • the “drive circuit” of the present invention is an electric circuit that supplies a high voltage to the ozone generator. For example, a control circuit that switches the frequency of the commercial AC voltage and a booster circuit that boosts the commercial AC voltage ( Transformer).
  • the ozone generator is applied with an alternating high voltage from the secondary side of the booster circuit.
  • the present invention consumes only a high-frequency current due to an inductance that hardly affects an applied voltage having a relatively low frequency while having a high impedance to the high-frequency current generated at the discharge electrode. As a result, the emission of high-frequency noise from the connection line is reduced. Since the high-frequency current generated at the discharge electrode does not flow toward the drive circuit (secondary side of the booster circuit in the above example configuration), the inductance is provided as close to the discharge electrode as possible. It is desirable. That is, the inductance is preferably connected in series with the connection terminal of the discharge electrode or configured as the connection terminal of the discharge electrode.
  • the ozone generator Since the ozone generator has a configuration in which the discharge electrode or the connection terminal or connection line of the discharge electrode is connected to the inductance, the ozone generator rejects the high-frequency current force s leaking from the connection portion between the above-mentioned portions and the inductance. I can't. Therefore, the inductance is configured such that the discharge electrode or the connection portion of the discharge electrode with the connection terminal or the connection line is covered with an insulator, and preferably the connection portion and the inductance are integrally covered with the insulator.
  • the inductance is composed of a coil, the entire coil including the discharge electrode or the connection terminal of the discharge electrode and the connection line is covered with an insulator.
  • an ozone which consumes only a high-frequency current and reduces the influence of the high-frequency noise on the ozone generation amount as much as possible while reducing the emission of high-frequency noise mainly from the connection line.
  • the generator can be provided.
  • the coil that forms the inductance does not have to consider the withstand voltage against high voltage, so it can be used with a small coil for surface mounting that is easily available. Realization of cost reduction and cost reduction, as well as downsizing and low cost of the ozone generator.
  • the present invention has the effect of providing an easy and inexpensive high-frequency noise countermeasure in an ozone generator that applies a high voltage to the discharge electrode.
  • FIG. 1 is a block diagram simply showing the configuration of an ozone generator using an ozone generator to which the present invention is applied.
  • FIG. 2 is a perspective view showing an example of an ozone generator to which the present invention is applied.
  • FIG. 3 This is a spectrum analyzer screen that measured the high-frequency noise of Comparative Example 1 in which the inductance was not connected in series with the ozone generator.
  • FIG. 4 This is a screen of a spectrum analyzer that measured the high-frequency noise of Example 1 in which an inductance of 1000 ⁇ H (lmH) was connected in series with an ozone generator.
  • FIG. 5 is a spectrum analyzer screen for measuring high-frequency noise in Example 2 in which an inductance of 2000 mH (2 mH) is connected in series to an ozone generator.
  • FIG. 1 is a block diagram simply showing the configuration of an ozone generator 1 using an ozone generator 4 to which the present invention is applied
  • FIG. 2 is a perspective view showing an example of the ozone generator 4 to which the present invention is applied.
  • FIG. The ozone generator 1 shown in this example is a standard configuration that is commonly found in the past.
  • the ozone generator 1 of the present example comprises a drive circuit 2 from a control circuit 21 and a booster circuit 22, and the control circuit 21 is connected to a commercial power source 3 so that the booster
  • the secondary side 222 of the circuit 22 is connected to the ozone generator 4 by a connection line 5.
  • the product surrounds the ozone generator 4 with a metal cover 23, grounds the control circuit 21, and shorts the primary side 221 and the secondary side 222 of the booster circuit 2 2 (in Fig. 1). (See dashed line).
  • the ozone generator 4 of this example is not a creeping discharge method in which silent discharge is performed at the edge of the plate-like discharge electrode.
  • the present invention can be applied to a silent discharge type ozone generator in which there is no difference in the effect of reducing high frequency noise due to the difference in specific discharge method. From this, even the creeping discharge type ozone generator can reduce high-frequency noise by the configuration shown in FIG.
  • the ozone generator 4 of this example is melted in a state where a pair of glass tubes 42, 42, through which rod-shaped discharge electrodes 41, 41 are inserted, are arranged in parallel.
  • the discharge electrode 41 is hermetically sealed to each glass tube 42 and the glass tubes 42 and 42 are integrated in close contact with each other, and an inductance (coil element with a lead wire) 43 is connected to the discharge electrode 41 protruding from each glass tube 42.
  • the lead wire of the inductance 43 is used as the connection terminal 44.
  • the ductance 43 may be a surface mount coil element.
  • the glass tube 42 is a relatively easily available and inexpensive insulator, and as described above, the discharge electrode 41 is melted and the glass tubes 42 and 42 are easily connected to each other. Is excellent.
  • the discharge electrode 41 when the glass tube 42 is heated and melted after the discharge electrode 41 is inserted, the discharge electrode 41 also thermally expands. Therefore, it is desirable that the thermal expansion coefficients of the glass tube 42 and the discharge electrode 41 are approximate.
  • the discharge electrode 41 was constituted by a tungsten wire, because of its thermal expansion force 10- 6 / K tungsten, the glass tube 42 is the use of borosilicate glass thermal expansion coefficient is 3.8 X 10- kappa Good.
  • the discharge electrode 41 when the glass tube 42 inserted through the discharge electrode 41 is heated to 950 ° C. to 1000 ° C., the discharge electrode 41 can be sealed and the glass tubes 42 and 42 can be connected to each other by melting.
  • both discharge electrodes 41 and 41 are electrically cut off by the glass tube 42 enclosing each discharge electrode 41, and silent discharge is generated between the surfaces of the opposing glass tube 42. Then, ozone is generated from the supplied raw material gas (oxygen or air containing oxygen).
  • the high frequency noise is radiated from the connection line 5 when the high frequency current resulting from the silent discharge attempts to return to the secondary side 222 of the booster circuit 22 in the drive circuit 2 through the connection line 5.
  • the inductance 43 connected in series to the ozone generator 4 consumes a high-frequency current that tends to flow from the discharge electrode 41 to the connection line 5, thereby reducing the flow of the high-frequency current to the connection line 5. The high frequency noise radiated by the high frequency current flowing through 5 is reduced.
  • the drive circuit (control circuit and booster circuit), connection line, and ozone generator are equivalent to the above block diagram (see Fig. 1).
  • the measurement circuit was assembled and the received intensity of high frequency noise radiated from the measurement circuit was measured.
  • the ozone generator used was configured as shown in the above example (Fig. 2), the glass tube was 40 mm long, 1.0 mm diameter borosilicate glass, and the discharge electrode was 0.5 mm diameter tungsten wire. .
  • the ozone generator of the above specifications uses the ambient air as the raw material gas and is a booster circuit of the drive circuit. When AC high voltage of 30kHz, 5.6kV ⁇ 5.8kV is applied, 10mg / l! Generates ⁇ 12mg / h ozone.
  • the measurement circuit is configured such that the ozone generator is not surrounded by a metal cover, and the primary side and the secondary side of the drive circuit and the booster circuit are not grounded.
  • the length of the connecting line is 180mm.
  • the measuring device used a 150 mm diameter loop antenna installed at a distance of ozone generating strength of 40 mm as a probe, and displayed the high frequency noise received by the probe on the spectrum analyzer screen.
  • the high frequency noise was measured by reading the display value at a specific frequency from the waveform displayed on the spectrum analyzer screen as the received intensity including the high frequency noise.
  • Example 1 has no inductance (that is, as usual), Example 1 has 1000 H (lmH) inductance (one coil element with 1000 ⁇ 1000 lead wire), and Example 2 has 2000 mH (2 mH) ) Inductance (two 1000 ⁇ lead coil elements).
  • the coil elements with lead wires which are separate from the ozone generator, are connected in series by clips, etc. for the convenience of changing the inductance capacity.
  • Each spectrum analyzer screen has a frequency of 0Hz to 2GHz on the horizontal axis.
  • the vertical axis is -100 dB to OdB in signal strength.
  • the lower band is the reception intensity of the ambient noise displayed in real time
  • the upper line is the reception intensity of the high-frequency noise.
  • Measure 3 Short circuit on primary side and secondary side of booster circuit It is.
  • the metal cover in Measure 1 is a SUS cover formed in the same way as an actual product. Since the raw material gas flows into the ozone generator and the generated ozone is discharged together with the remaining air, it has an opening that communicates with the outside and has almost no electromagnetic shielding effect.
  • the short circuit on the primary side and secondary side of the booster circuit in Measure 3 is also grounded on the secondary side via the primary side that is grounded together with the grounded drive circuit.
  • Example 1 was measured again.
  • Example 3 in which Measure 1 was applied to Example 1 Example 4 in which Measure 2 was added to Example 3 and Example 3 in which Measure 3 was added to Example 4
  • Example 5 was measured respectively.
  • the above Comparative Example 1 was measured again as a reference for comparison, and the Comparative Example 1 was compared with Countermeasure 1.
  • Example 2 Comparative Example 3 in which Countermeasure 2 was added to Comparative Example 2 and Comparative Example 4 in which Countermeasure 3 was added to Comparative Example 3 were also measured.
  • Example 3 The measurement results of Examples 3 to 5 are shown in Table 2, and the measurement results of Comparative Examples 1 to 4 are shown in Table 3, respectively.
  • Tables 2 and 3 “frequency (MHz)” and “noise (dB)” are the same as in Table 1 above.
  • Example 1 and Examples 3 to 5 are compared and contrasted, measures are taken in addition to inductance. Even if measures 1 to 3 are applied, the high frequency noise reduction effect does not appear to have been improved.
  • Comparative Example 1 and Comparative Examples 2 to 4 are compared and contrasted, it is confirmed that Measure 1 to Measure 3 certainly have an effect of reducing high-frequency noise.
  • Example 3 and Comparative Example 2 where Countermeasure 1 was applied
  • Example 4 and Comparative Example 3 where Countermeasure 1 and Countermeasure 2 were applied
  • Example 5 and Comparative Example 4 where Countermeasures 1 to 3 were applied, respectively.
  • the effect of reducing high-frequency noise is clearly improved by adding inductance.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)

Abstract

La quantité d'ozone générée n'est pas réduite lorsque le rayonnement du bruit haute fréquence provenant des lignes de connexion est réduit en empêchant un courant haute fréquence généré dans des électrodes de décharge de circuler dans les lignes de connexion, et lorsque l'effet d'une tension appliquée est réduit en empêchant le courant haute fréquence de circuler dans les lignes de connexion. Dans un dispositif (4) de génération d'ozone permettant d'appliquer une tension élevée d'un circuit d'alimentation à des électrodes de décharge (41) afin de générer de l'ozone par la décharge silencieuse des électrodes de décharge (41), des inductances (43) sont disposées sur les bornes de connexion (44) des électrodes de décharge (41) pour obtenir un dispositif de génération d'ozone (4) dans lequel les lignes de connexion s'étendant du circuit d'alimentation sont reliées aux électrodes de décharge (41) par les inductances (43).
PCT/JP2007/062240 2006-07-04 2007-06-18 Dispositif de génération d'ozone Ceased WO2008004433A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006184490A JP2009221023A (ja) 2006-07-04 2006-07-04 オゾン生成体
JP2006-184490 2006-07-04

Publications (1)

Publication Number Publication Date
WO2008004433A1 true WO2008004433A1 (fr) 2008-01-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/062240 Ceased WO2008004433A1 (fr) 2006-07-04 2007-06-18 Dispositif de génération d'ozone

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JP (1) JP2009221023A (fr)
WO (1) WO2008004433A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016002533A (ja) * 2014-06-19 2016-01-12 オーニット株式会社 原水に含まれる溶存酸素を原料としてオゾン水を製造するオゾン水の製造装置及びオゾン水の製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62841B2 (fr) * 1975-03-13 1987-01-09 Grace W R & Co
JP2001213613A (ja) * 2000-01-27 2001-08-07 Kobe Steel Ltd オゾン発生装置
JP2005001991A (ja) * 2004-08-02 2005-01-06 Toshiba It & Control Systems Corp オゾン発生器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62841B2 (fr) * 1975-03-13 1987-01-09 Grace W R & Co
JP2001213613A (ja) * 2000-01-27 2001-08-07 Kobe Steel Ltd オゾン発生装置
JP2005001991A (ja) * 2004-08-02 2005-01-06 Toshiba It & Control Systems Corp オゾン発生器

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