JP2018041575A - Ozone wind generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozone wine generation device capable of easily and sufficiently removing contamination of a needle-shaped electrode.SOLUTION: An ozone wind generation device 1 has a needle-shaped electrode 2 and generates ozone wind by generating corona discharge from the needle-shaped electrode 2. The ozone wind generation device 1 includes: a counter electrode 3 arranged to face the needle-shaped electrode 2; and a discharge control unit 4 for applying a predetermined first voltage between the needle-shaped electrode 2 and the counter electrode 3 so that electrons collide with the surface of the needle-shaped electrode 2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an ozone wind generator that generates ozone wind by corona discharge.

  In recent years, ozone wind generators that generate low-concentration ozone wind using corona discharge have been widely used in order to remove odors in the air, odors that stain clothes, and the like. Ozone removes odors by decomposing and deactivating substances that cause odors. In addition, since ozone has a very strong oxidizing power, it is effective for sterilization and virus removal.

  The ozone wind generator generates ozone wind by generating a corona discharge by applying a predetermined voltage between a needle electrode and a counter electrode arranged to face the needle electrode. For example, Patent Document 1 discloses an ozone wind and ion wind generator using multiple ring corona discharge. In the ozone wind and ion wind generating device disclosed in Patent Document 1, the counter electrode is formed in an annular shape, and the needle electrode is formed such that the tip portion extends toward the center of the counter electrode on the extension line of the central axis. Is arranged. As a result, the distance between the tip of the needle electrode and the annular counter electrode becomes substantially equal over the entire circumference of the counter electrode. Therefore, it is possible to reduce the variation in discharge that occurs between the needle electrode and the counter electrode. As a result, the deodorizing effect and the sterilizing effect of the ozone wind and ion wind generator can be improved.

JP 2011-175949 A

  When the ozone wind generator is continuously used, oxides, compounds, decomposition products, and the like of organic gas molecules contained in the air adhere to the electrode as dirt. As a result, there has been a problem that the amount of ozone generated in the ozone wind generator decreases.

  Conventionally, the counter electrode can be removed from the main body of the apparatus and can be sufficiently cleaned by washing with water or the like. On the other hand, since the tip of the needle electrode is pointed, it is fixed to the apparatus from the viewpoint of safety in handling and cannot be removed. Therefore, the needle-like electrode has been cleaned by a method such as wiping with a cotton swab or the like. Although the needle-like electrode is less contaminated than the counter electrode, such a cleaning method cannot remove minute dirt adhering to the needle-like electrode. Therefore, it cannot be said that the conventional cleaning method has sufficiently cleaned the needle-like electrode, and it has not been easy to obtain an ozone generation amount equivalent to that at the time of shipment by the cleaning.

  This invention is made | formed in view of the said present condition, and aims at providing the ozone wind generator which can remove the stain | pollution | contamination of a needle-shaped electrode easily and fully.

  As a result of various studies on the above problems, the present inventors applied a predetermined voltage between the needle electrode and the counter electrode disposed to face the needle electrode, and the needle electrode It was found that the contamination of the needle-like electrode can be easily and sufficiently removed by causing electrons to collide with the surface of the electrode.

  This invention is made | formed based on the said knowledge, The summary is as follows.

[1] An ozone wind generator that has an acicular electrode and generates ozone wind by generating corona discharge from the acicular electrode,
A counter electrode disposed to face the needle electrode;
An ozone wind generator, comprising: a discharge controller that applies a predetermined first voltage between the needle electrode and the counter electrode so that electrons collide with the surface of the needle electrode.

  The discharge controller applies a predetermined first voltage between the needle electrode and the counter electrode so that electrons collide with the surface of the needle electrode. At this time, the counter electrode emits electrons by being negatively charged. Then, the electrons collide toward the surface of the positively charged needle electrode. As a result, since the dirt adhering to the surface of the needle-like electrode is blown off by the electrons, the dirt adhering to the surface of the needle-like electrode can be sufficiently removed. Moreover, since it is not necessary to remove the dirt adhering to the surface of the needle electrode using a cotton swab or the like, the needle electrode can be easily cleaned.

  [2] The discharge controller is configured to generate the corona discharge by applying a second voltage having a polarity different from the predetermined first voltage between the needle electrode and the counter electrode. The ozone wind generation according to [1], wherein the voltage applied between the needle electrode and the counter electrode is switchable between the first voltage and the second voltage. apparatus.

  The discharge control unit applies a second voltage having a polarity different from the predetermined first voltage between the needle electrode and the counter electrode. At this time, the corona discharge can be generated by negatively charging the acicular electrode and positively charging the counter electrode. Therefore, the discharge controller is configured to be able to switch the voltage applied between the needle electrode and the counter electrode between the first voltage and the second voltage, so that the needle electrode And the counter electrode can be switched between the corona discharge and the cleaning of the needle electrode.

  Moreover, since the positive electrode at the time of performing the corona discharge and the negative electrode at the time of cleaning the acicular electrode can serve as the same counter electrode, the ozone wind generator can be miniaturized.

  [3] The discharge control unit according to [2], including a power supply unit including a positive electrode terminal and a negative electrode terminal, and a switching unit that switches connection between the positive electrode terminal and the negative electrode terminal and the needle electrode. Ozone wind generator.

  Since the discharge control unit has the switching unit, the polarity of the voltage applied between the needle electrode and the counter electrode can be switched. Therefore, the configuration [2] can be realized without using two power supplies having different polarities.

  [4] The ozone according to [2] or [3], wherein the discharge control unit alternately applies the first voltage and the second voltage between the needle electrode and the counter electrode. Wind generator.

  The discharge control unit alternately applies the first voltage and the second voltage between the needle electrode and the counter electrode, thereby performing the corona discharge and cleaning the needle electrode. It can be done alternately. As a result, dirt attached to the needle-like electrode by the corona discharge can be periodically removed to make it difficult to attach dirt to the needle-like electrode.

[5] The counter electrode is an electrode formed in an annular shape so as to surround a central axis,
In any one of [1] to [4], the needle-like electrode is disposed so that a distal end portion thereof extends toward the counter electrode side on an extension line of the central axis of the counter electrode. The ozone wind generator as described.

  By disposing the needle-like electrode as described above, the distance between the tip of the needle-like electrode and the counter electrode becomes substantially equal over the entire circumference of the counter electrode. Therefore, the discharge variation can be reduced during corona discharge described later.

  According to one embodiment of the present invention, it is possible to provide an ozone wind generator that can easily and sufficiently remove the contamination of the needle-like electrode.

It is a circuit diagram showing a schematic structure of ozone wind generator 1 concerning an embodiment. In the ozone wind generator 1, it is a circuit diagram which shows the state which the discharge control part 4 applied the predetermined | prescribed 1st voltage between the acicular electrode 2 and the counter electrode 3. FIG. It is a circuit diagram which shows schematic structure of the ozone wind generator 10 which concerns on other embodiment. It is a circuit diagram which shows schematic structure of the ozone wind generator 21 which concerns on other embodiment. FIG. 6 is a circuit diagram showing a state in which a predetermined first voltage is applied between the needle electrode 2 and the counter electrode 3 ′ in the ozone wind generator 21.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the dimension of the structural member in each figure does not represent the dimension of an actual structural member, the dimension ratio of each structural member, etc. faithfully.

(overall structure)
FIG. 1 is a circuit diagram illustrating a schematic configuration of an ozone wind generator 1 according to the embodiment. FIG. 1 is a circuit diagram showing a state in which the discharge controller 4 applies a predetermined second voltage between the needle electrode 2 and the counter electrode 3. FIG. 2 is a circuit diagram showing a state in which a predetermined first voltage is applied between the acicular electrode 2 and the counter electrode 3 in the ozone wind generator 1.

  As shown in FIG. 1 and FIG. 2, the ozone wind generator 1 includes a needle electrode 2, a counter electrode 3 disposed so as to face the needle electrode 2, and the needle electrode 2 and the counter electrode 3. And a discharge controller 4 for applying a voltage.

  The acicular electrode 2 is an acicular electrode having a sharply pointed tip portion 21. In the present embodiment, the needle-like electrode 2 is formed in a needle shape. However, the shape is not limited to this, and any shape may be used as long as it has a sharp tip portion.

  The counter electrode 3 is an annular flat electrode in plan view. That is, the counter electrode 3 is provided with a circular through hole 31 at the center of the circular plate-shaped member. A symbol X shown in FIGS. 1 and 2 is a central axis of the through hole 31. The shape of the counter electrode 3 may be a circular shape, an elliptical shape, a polygonal shape, or the like. Further, the counter electrode 3 may be a flat electrode without a through hole.

  Examples of the material for the needle-like electrode 2 and the counter electrode 3 include stainless steel, nickel, aluminum, copper, tungsten, silicon, and the like, and stainless steel is preferable from the viewpoint of versatility and workability.

  The needle-like electrode 2 is arranged so that the pointed tip portion 21 is positioned on the extension line of the central axis X of the counter electrode 3. Specifically, the needle-like electrode 2 has a distal end portion 21 located on an extension line of the central axis X of the counter electrode 3 and extending toward the center of the through hole 31 of the counter electrode 3 (on the counter electrode 3 side). Is arranged. As a result, the distance between the tip of the needle electrode 2 and the annular counter electrode 3 becomes substantially equal over the entire circumference of the counter electrode 3. Therefore, the discharge variation is reduced during the corona discharge described later.

  The discharge control unit 4 is provided in a power source unit 5 that applies a voltage to the needle electrode 2 and a circuit that connects the power source unit 5 and the needle electrode 2, and is applied to the needle electrode 2 from the power source unit 5. A switching unit 6 for changing the polarity of the voltage to be controlled, and a control unit 61 for controlling the switching unit 6. The counter electrode 3 is connected to the ground 7.

  The power supply unit 5 is a power supply device that supplies a predetermined voltage to the needle electrode 2. The power supply unit 5 has a positive terminal 51 and a negative terminal 52 for outputting a voltage to the outside. The power supply unit 5 may be a direct current power supply or may be configured to include a power conversion device that converts the output of the alternating current power supply into direct current.

  The switching unit 6 connects the ground 7 or the needle electrode 2 to the positive electrode terminal 51 of the power supply unit 5 and the switch unit 8 a that connects the needle electrode 2 or the ground 7 to the negative electrode terminal 52 of the power supply unit 5. And a switch portion 8b. Specifically, the switch unit 8 a is connected to the negative electrode terminal 52 and the needle electrode 2 so as to selectively connect the needle electrode 2 and the ground 7 to the negative electrode terminal 52. The connection state with the ground 7 can be switched. In addition, the switch unit 8b is connected to the positive terminal 51 and the ground 7 and the positive terminal 51 and the needle electrode 2 so as to selectively connect the ground 7 and the needle electrode 2 to the positive terminal 51. The connection state is configured to be switchable.

  In the present embodiment, the switching unit 6 is controlled by the control unit 61 to switch the switch units 8a and 8b. However, the switching unit 6 is not limited to this, and is configured to be able to manually switch the switch units 8a and 8b. Also good.

  In the ozone wind generator 1, a plurality of sets of the needle electrode 2 and the counter electrode 3 that are arranged to face each other may be arranged.

(Corona discharge)
Next, operation | movement of the ozone wind generator 1 in case a corona discharge arises between the acicular electrode 2 and the counter electrode 3 is demonstrated using FIG.

  As shown in FIG. 1, when corona discharge is performed between the needle electrode 2 and the counter electrode 3, the switch unit 8 a of the switching unit 6 electrically connects the negative electrode terminal 52 and the needle electrode 2 of the power source unit 5. The switch unit 8b of the switching unit 6 electrically connects the positive terminal 51 of the power source unit 5 and the ground 7 together. Accordingly, since the needle-like electrode 2 has a negative potential, a predetermined second voltage is applied between the needle-like electrode 2 and the counter electrode 3 having a zero potential. The second voltage is preferably 4,000 to 6,000 V when the shortest distance between the needle electrode 2 and the counter electrode 3 is about 1 cm.

  When the second voltage is applied between the needle electrode 2 and the counter electrode 3, electrons are emitted from the needle electrode 2, and corona discharge occurs. As described above, in the ozone wind generator 1, the distance between the tip of the needle-like electrode 2 and the annular counter electrode 3 is arranged to be substantially equal over the entire circumference of the counter electrode 3. Therefore, the variation in corona discharge can be reduced.

  In the corona discharge, a high voltage having a negative polarity is applied to the tip 21 of the needle electrode 2. For this reason, oxides and minute particles of organic gas molecules contained in the air are positively charged by the energy of corona discharge and adhere to the tip 21 of the needle electrode 2 as dirt. As a result, the amount of ozone generated by corona discharge is reduced. Therefore, the following cleaning of the needle electrode 2 is performed.

(Cleaning the needle electrode)
As described above, when dirt is attached to the tip 21 of the needle electrode 2, the tip 21 of the needle electrode 2 is cleaned as follows. Hereinafter, the cleaning of the distal end portion 21 of the needle electrode 2 will be described with reference to FIG.

  As shown in FIG. 2, when cleaning the tip 21 of the needle electrode 2, the switch unit 8 a of the switching unit 6 electrically connects the positive electrode terminal 51 of the power supply unit 5 and the needle electrode 2. At the same time, the switch unit 8 b of the switching unit 6 electrically connects the negative terminal 52 of the power supply unit 5 and the ground 7. Accordingly, since the needle-like electrode 2 has a positive potential, a predetermined first voltage is applied between the needle-like electrode 2 and the counter electrode 3 having a zero potential. The first voltage is preferably 4,000 to 6,000 V when the shortest distance between the needle electrode 2 and the counter electrode 3 is about 1 cm.

  When the first voltage is applied between the needle electrode 2 and the counter electrode 3, electrons are emitted from the counter electrode 3 and the electrons collide toward the surface of the needle electrode 2. Thereby, the dirt adhering to the surface of the needle electrode 2 is blown off by the electrons. As described above, in the ozone wind generator 1, the distance between the tip of the needle-like electrode 2 and the annular counter electrode 3 is arranged to be substantially equal over the entire circumference of the counter electrode 3. Therefore, variation in electrons emitted from the counter electrode 3 can be reduced. As a result, dirt attached to the surface of the needle-like electrode 2 can be removed more efficiently. Moreover, since it is not necessary to remove the dirt adhering to the surface of the needle electrode 2 using a cotton swab or the like, the needle electrode 2 can be easily cleaned.

  As described above, since the discharge control unit 4 includes the switching unit 6, the voltage applied between the needle electrode 2 and the counter electrode 3 is switched between the second voltage and the first voltage having different polarities. be able to. Therefore, since the ozone generator 1 does not need to use two power supplies that output voltages of different polarities, the overall size of the apparatus can be reduced.

  Moreover, since the positive electrode at the time of corona discharge and the negative electrode at the time of cleaning the acicular electrode 2 can serve as the same counter electrode 3, the ozone generator 1 can be reduced in size.

(Other embodiments)
While the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and the above-described embodiment can be appropriately modified and implemented without departing from the spirit of the invention.

  The controller 61 has a corona discharge state in which the switch unit 8a connects the negative electrode terminal 52 of the power supply unit 5 and the needle electrode 2 and the switch unit 8b connects the positive electrode terminal 51 of the power supply unit 5 and the ground 7 ( That is, the state shown in FIG. 1), the switch unit 8 a connects the positive electrode terminal 51 of the power supply unit 5 and the needle electrode 2, and the switch unit 8 b connects the negative electrode terminal 52 of the power supply unit 5 and the ground 7. The cleaning state to be performed (that is, the state shown in FIG. 2) may be switched alternately. Thereby, the discharge control unit 4 alternately applies the second voltage and the first voltage between the needle electrode 2 and the counter electrode 3.

  Therefore, the ozone wind generator 1 can alternately perform corona discharge between the needle electrode 2 and the counter electrode 3 and cleaning of the needle electrode 2. As a result, dirt attached to the needle-like electrode 2 due to corona discharge can be periodically removed, so that dirt can hardly be attached to the needle-like electrode 2.

  In the case of the configuration as described above, the control unit 61 preferably switches the connection state of the switching unit 6 alternately between the corona discharge state and the cleaning state according to time. At that time, the control unit 61 operates the switching unit 6 to continue the cleaning state for a second predetermined time (for example, 1 minute) after continuing the corona discharge state for a first predetermined time (for example, 30 minutes). Are performed alternately.

  The first predetermined time may be set to such a time that the generation amount of ozone is reduced to some extent due to the adhesion of the tip 21 of the needle electrode 2, or the tip of the needle electrode 2. It may be set to a time when 21 does not have much dirt. Further, the second predetermined time may be set to a time that can sufficiently remove the dirt on the tip 21 of the needle electrode 2, or set to a time that can remove the dirt on the tip 21 to some extent. May be.

  The control unit 61 may alternately switch the connection state of the switching unit 6 between the corona discharge state and the cleaning state according to the amount of current during corona discharge. The amount of current during corona discharge is proportional to the amount of ozone generated. That is, if the amount of ozone generated decreases due to contamination on the needle electrode 2, the amount of current during corona discharge decreases. Therefore, the control unit 61 continues the corona discharge state to the switching unit 6 until the current during the corona discharge is equal to or lower than a first predetermined value, and then the cleaning state is changed to the current during the cleaning. The operation of continuing until the second predetermined value or more may be alternately performed.

  The first predetermined value is set to a current value when the generation amount of ozone is reduced due to dirt adhering to the distal end portion 21 of the needle electrode 2. The second predetermined value may be set to a current value when the stain on the tip 21 of the needle electrode 2 is sufficiently removed, or when the stain on the tip 21 is removed to some extent. It may be set to a current value.

  The ozone wind generator 1 according to this embodiment includes a switching unit 6. However, instead of providing the switching unit 6, a power supply unit 15 that can switch the polarity of the output voltage may be provided. Hereinafter, this will be specifically described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure same as FIG. 1 and 2, and description is abbreviate | omitted.

  FIG. 3 is a circuit diagram showing a schematic configuration of an ozone wind generator 11 according to another embodiment. In the ozone wind generator 11, the discharge control unit 14 includes a power supply unit 15 including a first terminal 151 and a second terminal 152 for outputting a voltage. The first terminal 151 is electrically connected to the ground 7. The second terminal 152 is electrically connected to the needle electrode 2. The counter electrode 3 is also connected to the ground 7.

  The power supply unit 15 can change the polarities of the voltages output from the first terminal 151 and the second terminal 152, respectively. That is, when the corona discharge is generated, the second voltage is applied between the needle electrode 2 and the counter electrode 3 with the first terminal 151 as the positive electrode and the second terminal 152 as the negative electrode. On the other hand, when cleaning the needle electrode 2, the first voltage is applied between the needle electrode 2 and the counter electrode 3 with the first terminal 151 as the negative electrode and the second terminal 152 as the positive electrode.

  In the present embodiment, the counter electrode 3 functions as a positive electrode when performing corona discharge, and functions as a negative electrode when cleaning the tip portion 21 of the needle electrode 2. However, in the ozone wind generators 1 and 11, the counter electrode which is a positive electrode when performing corona discharge and the counter electrode which is a negative electrode when cleaning the needle-like electrode may be different electrodes. Hereinafter, this will be specifically described with reference to FIGS. 4 and 5. In addition, the same code | symbol is attached | subjected to the structure same as FIGS. 1-3, and description is abbreviate | omitted.

  FIG. 4 is a circuit diagram showing a schematic configuration of an ozone wind generator 21 according to another embodiment. FIG. 4 is a circuit diagram showing a state in which a predetermined second voltage is applied between the needle electrode 2 and the counter electrode 3. FIG. 5 is a circuit diagram showing a state where a predetermined first voltage is applied between the needle electrode 2 and the counter electrode 3 ′ in the ozone wind generator 21.

  As shown in FIGS. 4 and 5, the ozone wind generator 21 has a switching unit 26 between the counter electrodes 3, 3 ′ and the ground 7. The switching unit 26 includes a switch unit 28 a that switches connection and disconnection between the counter electrode 3 and the ground 7, and a switch unit 28 b that switches connection and disconnection between the counter electrode 3 ′ and the ground 7. As shown in FIG. 4, when corona discharge is performed between the needle electrode 2 and the counter electrode 3, the switch unit 28a of the switching unit 26 electrically connects the counter electrode 3 and the ground 7, The switch portion 28b electrically disconnects the counter electrode 3 ′ and the ground 7. Thereby, a predetermined second voltage is applied between the needle-like electrode 2 and the counter electrode 3 having a zero potential. On the other hand, as shown in FIG. 5, when cleaning the distal end portion 21 of the needle electrode 2, the switch portion 28 b of the switching portion 26 electrically connects the counter electrode 3 ′ and the ground 7, and the switch The part 28a electrically disconnects the counter electrode 3 and the ground 7 from each other. Thereby, a predetermined first voltage is applied between the needle-like electrode 2 and the counter electrode 3 ′ having zero potential. With the above configuration, the ozone wind generator 21 uses the counter electrode 3 that is a positive electrode when performing corona discharge and the counter electrode 3 ′ that is a negative electrode when cleaning the needle-like electrode 2 as separate electrodes. be able to. Therefore, when it is not desired to generate ozone wind when cleaning the needle-like electrode 2, it is possible to use the counter electrode 3 'having a shape that hardly generates ozone wind.

  The ozone wind generator according to the present embodiment can be used in a cleaner or the like that is used for removal of odors in the air, odors on clothes, etc., sterilization, virus removal, and the like.

DESCRIPTION OF SYMBOLS 1 Ozone wind generator 2 Needle electrode 3 Counter electrode 4 Discharge control part

Claims (5)

An ozone wind generator having an acicular electrode and generating an ozone wind by generating a corona discharge from the acicular electrode,
A counter electrode disposed to face the needle electrode;
An ozone wind generator, comprising: a discharge controller that applies a predetermined first voltage between the needle electrode and the counter electrode so that electrons collide with the surface of the needle electrode.   The discharge controller is configured to generate the corona discharge by applying a second voltage having a polarity different from the predetermined first voltage between the needle electrode and the counter electrode. The ozone wind generator according to claim 1, wherein a voltage applied between the needle electrode and the counter electrode can be switched between the first voltage and the second voltage.   The ozone discharge generator according to claim 2, wherein the discharge control unit includes a power supply unit having a positive electrode terminal and a negative electrode terminal, and a switching unit that switches connection between the positive electrode terminal, the negative electrode terminal, and the needle electrode. .   4. The ozone wind generator according to claim 2, wherein the discharge control unit alternately applies the first voltage and the second voltage between the needle electrode and the counter electrode. 5. The counter electrode is an electrode formed in an annular shape so as to surround a central axis,
The ozone according to any one of claims 1 to 4, wherein the needle electrode is disposed such that a tip portion thereof extends toward the counter electrode on an extension line of the central axis of the counter electrode. Wind generator.

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