JPH07157302A - Ozone generator - Google Patents

Abstract

PURPOSE:To prevent the decomposition of ozone and increase a generation of the ozone by widing an electric discharge region to suppress the rising of temp. at the electric discharge region. CONSTITUTION:Dielectric bodies 4A...4F are clladed on an outside of plural bar-shaped electrodes 2A...2F disposed in parallel and in equal interval to each other, and a metallic cylindrical body 5 is provided at the outside of the electrode unit 1 consisting of the dielectric bodies, and silent discharge is induced between the bar-shaped electrodes and between the bar-shaped electrodes and the metallic cylindrical body through the dielectric bodies, and corona electric discharge is executed at both wide area electric discharge spaces of an electric discharge space 3 between adjacent bar-shaped electrodes at an inside of the electrode unit and a separated bar-shaped electrodes and the electric discharge space 7 between the bar-shaped electrodes and the metallic cylindrical body to produce large volume of the ozone, and the ozone is hardly decomposed due to local high temp. by dispersing the discharge region.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone generator for generating ozone by a silent discharge method to sterilize and deodorize various bacteria such as air and water which are the objects to be sterilized.

[0002]

2. Description of the Related Art Generally, ozone is known to have a bactericidal effect and a deodorizing effect. Utilizing such an effect, for example, in Japanese Examined Patent Publication No. 63-51025, an AC voltage is applied to a low pressure mercury discharge lamp to generate ozone.

In the silent discharge method described above, a glass plate or a dielectric material such as mica or ceramics is sandwiched between a pair of flat electrodes, and an oxygen-containing gas (for example, air) is flown in parallel between the electrodes to generate a voltage of 6 to 18 KV. This is a method in which an AC high voltage is applied and discharge is performed vertically between the counter electrodes.

Electrons emitted from the electrodes due to this discharge collide with oxygen molecules to dissociate oxygen into atoms or generate excited oxygen molecules. Oxygen molecules and excited oxygen molecules react with other oxygen molecules to generate ozone. In the discharge gap, ozone decomposition reaction is also performed in parallel with this ozone generation reaction, but this is due to collision of oxygen atoms with each other, which has an adverse effect on ozone generation by discharge.

However, in the case of this discharge method, it is widely used because of its low power consumption for ozone generation, stable performance, and simple operability.

Further, the applicant recently proposed a silent discharge type ozone generator using a plurality of electrodes which is small in size compared to the amount of ozone generated between the flat electrodes and which can generate a large amount of ozone.

This ozone generator is arranged in parallel with each other at equal intervals and has a polygonal shape in a plan view. The electrode unit is composed of a plurality of rod-shaped electrodes in which a vertically long discharge space is formed, and the discharge described above. A cylindrical dielectric disposed in the space and a high voltage applying means for applying a high voltage to the rod-shaped electrode are provided, and a high voltage is applied to the rod-shaped electrode to connect the rod-shaped electrodes via the dielectric. This is what induces silent discharge.

[0008]

In the electrode unit using a plurality of rod-shaped electrodes as described above, since silent discharge is performed between the respective rod-shaped electrodes, ozone generated in the case of discharge between flat electrodes is generated. Although a large amount of ozone can be obtained compared with the amount, the discharge area was concentrated only in the discharge space inside the electrode unit.

For this reason, the temperature in the discharge region (discharge space) rises to 300 ° C. or higher, and the ozone that has been generated is destroyed by the high temperature. Further, there is a drawback that more ozone cannot be generated because the discharge area is concentrated.

Incidentally, if the distance between the rod-shaped electrodes is set to be large, the discharge region inside the electrode unit is widened to generate a large amount of ozone. However, it is necessary to apply a higher voltage between the rod-shaped electrodes. There is a drawback that the transformer used as the high voltage applying means becomes large and the apparatus becomes large in size, and the influence of noise on the electric equipment becomes large.

According to the present invention, the discharge region is widened and the temperature rise is suppressed to prevent the destruction of ozone, and the amount of ozone generated is increased.

[0012]

According to the present invention, an electrode unit composed of a plurality of rod-shaped electrodes arranged in parallel with each other at equal intervals and having a polygonal planar shape, and an outer cover of the rod-shaped electrode. A dielectric body; a metal cylinder body provided outside the electrode unit; and a high voltage applying means for applying an AC high voltage to each of the rod-shaped electrode and the metal cylinder body, or at least the rod-shaped electrode. Through this, silent discharge is induced between the rod-shaped electrodes and between the rod-shaped electrodes and the metal cylinder.

Further, the rod-shaped electrode serves as a discharge region in which the distance between the adjacent electrodes and the distance between the rod-shaped electrode and the metal cylinder are substantially equal.

Upper and lower ends of the rod-shaped electrode and the metal cylinder are provided with upper and lower end covers for supporting the ends of the rod-shaped electrode and the metal cylinder, respectively. It is connected to the discharge space formed inside the unit.

Furthermore, the upper and lower end covers are provided with electrode terminals that are connected to the ends of the rod-shaped electrodes and cylindrical terminals that are connected to a metal cylinder, and the high voltage applying means is provided with the electrode terminals and the cylindrical terminals. And the electrode terminals are alternately provided on the upper and lower end cover for each adjacent electrode terminal.

Further, the cylindrical body terminal is led out from an end cover provided in a part of the metal cylindrical body and different from the electrode terminal adjacent to the cylindrical body terminal.

[0017]

According to the present invention, a plurality of rod-shaped electrodes arranged in parallel with each other at equal intervals are covered with a dielectric, and a metal cylinder is provided outside the electrode unit formed by the rod-shaped electrodes. Since a silent discharge is induced between the rod-shaped electrodes and between the rod-shaped electrodes and the metal cylinder through the dielectric, a region of the silent discharge is generated by the AC high voltage applied to the rod-shaped electrode and the metal cylinder. Is a wide discharge space between the adjacent rod-shaped electrodes inside the electrode unit and between the spaced-apart rod-shaped electrodes and the space between the rod-shaped electrodes and the metal cylinder. There is no possibility that ozone will be destroyed due to high temperature.

Further, since the rod-shaped electrodes are discharge regions arranged so that the distance between the adjacent electrodes and the distance between the rod-shaped electrode and the metal cylinder are substantially equal to each other, the respective regions are arranged. A stable discharge can be obtained.

An end cover is provided at each of the upper and lower portions of the rod-shaped electrode and the metal cylinder, and the discharge space formed at the inside of the electrode unit has a discharge port of the cover, the rod-shaped electrode and the metal cylinder. Since it is connected to the discharge space formed between them, the ozone generated in each discharge space can be taken out to the outside through the flow port.

Further, the upper and lower end cover is provided with an electrode terminal which is connected to the end of the rod-shaped electrode and a cylindrical terminal which is connected to a metal cylindrical body, and the high voltage applying means is provided with the electrode terminal and the cylindrical terminal. Since the electrode terminals are alternately provided on the upper and lower end cover for each adjacent electrode terminal, the respective electrode terminals to which a high voltage is applied are separated from each other. It is possible to increase the insulation distance, prevent a short circuit between the electrode terminals, and increase the shape of each electrode terminal to reduce the electrical resistance.

Further, since the tubular body terminal is derived from an end cover which is provided in a part of the metal tubular body and is different from the electrode terminal adjacent to the tubular body terminal, it is separately insulated. It is possible to prevent a short circuit between electrode terminals and a short circuit between different electrodes without using parts.

[0022]

Embodiments of the present invention will be described with reference to the drawings. 1 is a side sectional view of an ozone generator which is an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a plan view thereof, and FIG. 4 is an electric circuit diagram thereof.

(1) are parallel to each other and are arranged at equal intervals with a predetermined distance (H1), and the plane shape is a regular polygon (regular hexagon).
(Six) 1st to 6th rod-shaped electrodes (2A)
.. (2F), the vertically long discharge space (3) is formed inside. The rod electrode (2
A) (2F) is made of stainless steel,
The length is set to about 700 mm.

Reference numerals (4A) ... (4F) are pipe-shaped dielectrics formed of, for example, quartz glass or ceramics, which are attached to the outsides of the first to sixth rod-shaped electrodes (2A) to (2F) as closely as possible. Although the thickness is set to about 1.2 mm, it may be changed according to the distance between the rod-shaped electrodes and the voltage applied to the rod-shaped electrodes.

Reference numeral (5) is a cylindrical metal cylinder provided outside the electrode unit (1) at a predetermined distance (H2) and made of, for example, stainless steel. (6) is provided. This predetermined distance (H2)
The above-mentioned predetermined distance (H1) is set to a substantially equidistant distance, specifically about 10 mm. A discharge space (7) is also formed between the electrode unit (1) and the metal cylinder (5), and the discharge space is formed by the rod electrodes (2A) (2).
It is in communication with the discharge space (3) of the electrode unit (1) through the space (F).

(8) is an upper end cover fitted to the upper part of the electrode unit (1) and the metal cylinder (5), and has a flow port (9) communicating with the discharge space (3) in the center. Although not shown in detail, a plurality of first electrodes connected to the ends of the rod-shaped electrodes (2A) (2F) are provided around the outside of the flow port.
Sixth electrode terminals (10A) ... (10F) are provided. As shown in FIG. 3, the electrode terminals (10A) ... (10F) are arranged alternately with those embedded in the upper end cover (8) and those protruding upward, and the second electrode terminals (10B).
And the fourth electrode terminal (10D) and the sixth electrode terminal (10F), respectively.

(11) is a lower end cover fitted to the lower part of the electrode unit (1) and the metal cylinder (5), and has a discharge space (3) at the center similar to the upper end cover (8). )
Although not shown in detail, a rod-shaped electrode (2A) (2) is provided around the outer side of the flow port, which is not shown in detail.
F) a plurality of first to sixth electrode terminals (1
3A) ... (13F) are provided. The electrode terminal (13
A) ... (13F) are arranged alternately with the one embedded in the lower end cover (11) and the one projecting downward, and the first electrode terminal (13A), the third electrode terminal (13C), and the third electrode terminal (13C). 5
Each of the electrode terminals (13E) is projected.

The protruding electrode terminals (10B) (10
D) (10F), (13A) (13C) (13E)
Upper and lower end covers (8), (11) for each adjacent electrode terminal
Are alternately provided to secure a large insulation distance when connecting a power source.

The tubular terminal (6) is led out from an upper end cover (8) different from the lower end cover provided with the electrode terminal (13C) adjacent to the tubular terminal.

Next, the electric circuit diagram shown in FIG. 4 will be described.

(14) is the rod-shaped electrode (2A) (2)
F) is a high voltage applying means which is provided in accordance with the number of F) and which generates a high voltage on the secondary side to generate a rotating magnetic field between the rod-shaped electrodes. A high voltage is applied to the electrodes to generate silent discharge between the rod-shaped electrodes, the details of which will be described below.

Reference numerals (16), (17) and (18) denote primary side connection terminals of the transformers (15A) ... (15F) which are delta connected (or star connected) to a three-phase AC power source. One end on the secondary side of the first transformer (15A) and the other end on the secondary side of the fourth transformer (15D) are connected to each other, and the second transformer (1
5B) is connected to one end of the secondary side of the fifth transformer (15E) and the other end of the third transformer (15C) is connected to the second end of the sixth transformer (15F). The other end is connected. Also, the first, third, and fifth transformers (15
A), (15C), and (15E), one end on the secondary side and the second, fourth, and sixth transformers (15B) and (15).
The other ends on the secondary side of D) and (15F) are short-circuited to form a common electrode, which is connected to the cylindrical terminal (6).

First combined with the first rod-shaped electrode (2A)
The terminal (13A) is connected to the other end on the secondary side of the first transformer (15A), and the second terminal (10B) coupled to the second rod-shaped electrode (2B) is on the secondary side of the second transformer (15B). The third terminal (1) connected to one end and coupled to the third rod-shaped electrode (2C)
3C) is connected to the other end on the secondary side of the third transformer (15C), and is coupled to the first rod-shaped electrode (2A) and the first terminal (10D) coupled to the fourth rod-shaped electrode (2D) facing 180 ° away from the first rod-shaped electrode (2A). )
Is connected to one end on the secondary side of the fourth transformer (15D) and faces the second rod-shaped electrode (2B) at a distance of 180 degrees.
The first terminal (13E) coupled to the rod-shaped electrode (2E) has a fifth
The other end of the secondary side of the transformer (15E) is connected to the third side.
The first terminal (10F) coupled to the sixth rod-shaped electrode (2F) facing the rod-shaped electrode (2C) at an angle of 180 degrees is connected to one end of the sixth transformer (15F) on the secondary side.

First to sixth transformers (15A)
Six-phase alternating current with a phase difference of 60 degrees is output to each secondary side of (15F).

Next, the operation will be described.

First, the assembly structure will be described. The electrode unit (1) and the metal cylinder body in the state where the lower ends of the rod-shaped electrodes (2A) ... (2F) are previously coupled to the respective electrode terminals (13A) ... (13F) of the lower end cover (11). The lower end cover (1
1) is fixed and the electrode terminals (13A), (13) are connected to the three rod-shaped electrodes of the rod-shaped electrodes (2A) ... (2F).
C) and (13E) can be connected to the power source. Then, the upper ends of the rod-shaped electrodes (2A) ... (2F) and the cylindrical terminal (5) are coupled to the upper end cover (8) to connect the cylindrical terminal (5) to the upper end cover (8). ) And the three electrode terminals (13A), (13C), and (13E) excluding the three electrode terminals (13A), (13C), and (13E) protruding above the lower end cover (11) of the rod-shaped electrodes (2A) ... (2F). It is possible to connect the power source to the electrode terminals (10B), (10D) and (10F) coupled to the three rod-shaped electrodes (13B), (13D) and (13F) and the cylindrical terminal (5).

Therefore, the cylindrical terminal (5) protruding from the upper end cover (8) and the three electrode terminals (10B), (10)
D) and (10F) are connected to a power source through flat terminals (not shown), and similarly three electrode terminals (13A), (13C) and (13E) projecting from the lower end cover (11). Is also connected to the power supply via a flat terminal (not shown).

Then, 3 is provided on the primary side of each transformer.
When 60V of the phase alternating current power supply is applied, the high voltage (set to 9KV or more and 15KV or less) generated on the secondary side of the transformer is applied between the rod electrodes (2A) (2F) and the cylindrical terminal (5). Is applied to the dielectric (4A) of the first rod-shaped electrode (2A) and the dielectric (4D) of the fourth rod-shaped electrode (2D) between the first and fourth rod-shaped electrodes (2A) and (2D). A discharge is initiated through the surface of the one dielectric to emit electrons toward the other dielectric, and between the other second and fifth rod-shaped electrodes (2B) and (2E) and the third, A corona discharge between the sixth rod electrodes (2C) and (2F) is induced.

In this way, when the discharge is started, the discharge is also generated between the first rod-shaped electrode (2A) and the second rod-shaped electrode (2B) and between the second rod-shaped electrode (2B) and the third rod-shaped electrode (2C) which are adjacent to each other. Start. Further, between the third rod-shaped electrode (2C) and the fourth rod-shaped electrode (2D), between the fourth rod-shaped electrode (2D) and the fifth rod-shaped electrode (2E), between the fifth rod-shaped electrode (2E) and the sixth rod-shaped electrode ( Even during 2F), corona discharge is sequentially performed through each dielectric. Similarly, silent discharge is sequentially performed between the sixth rod-shaped electrode (2F) and the first rod-shaped electrode (2A) to generate ozone.

At the same time as the above-mentioned discharge between the rod-shaped electrodes, discharge is also started between the rod-shaped electrodes and the metal cylinder (5), and the discharge space (3) inside the electrode unit (1) and the electrode unit ( Discharge continues in both space portions of the discharge space (7) outside 1).

Therefore, the air sucked from the circulation port (9) of the upper end cover (8) by the suction fan (not shown) passes through the discharge spaces (3) and (7) to discharge the air. After being sterilized by the ozone generated in the space, it is taken out from the circulation port (12) of the lower end cover (11).

[0042]

As described above, according to the present invention, a metal cylinder is provided outside an electrode unit in which a plurality of rod-shaped electrodes are covered with a dielectric, and the metal cylinder is provided between the rod-shaped electrodes through the dielectric. Since a silent discharge is induced between the rod-shaped electrode and the metal cylinder, a wide space between the adjacent rod-shaped electrodes inside the electrode unit and between the separated rod-shaped electrodes and the space between the rod-shaped electrode and the metal cylinder is wide. In this case, a large amount of ozone is generated, and the discharge area is not concentrated in a part, so that the temperature is locally high and the ozone is not destroyed.

Further, since the rod-shaped electrodes are discharge regions arranged so that the distance between the adjacent electrodes and the distance between the rod-shaped electrode and the metal cylinder are substantially equal to each other, the respective regions are arranged. The discharge distance is constant and stable discharge can be obtained.

The rod-shaped electrode and the flow ports of the upper and lower end covers provided on the upper and lower portions of the metal cylinder are connected to the discharge space of the electrode unit and the discharge space formed between the rod-shaped electrode and the metal cylinder. Therefore, the ozone generated in each discharge space can be continuously taken out to the outside through the flow port.

Further, the upper and lower end covers are connected to the electrode terminals to which a high voltage is applied by the high voltage applying means in combination with the rod-shaped electrodes, and to the metal cylinder to which a high voltage is applied by the high voltage applying means. Since the cylindrical terminals are provided and the electrode terminals are alternately provided on the upper and lower end portions of the adjacent electrode terminals, the respective electrode terminals to which the high voltage is applied are separated from each other. Insulation distance can be long to prevent unnecessary discharge and short circuit between electrode terminals,
Moreover, the electrical resistance can be reduced by enlarging the shape of each electrode terminal.

Further, since the tubular terminal is led out from the end cover different from the electrode terminal at the closest position, it is possible to prevent a short circuit between the electrode terminals without using a separate insulating part. It is possible to prevent a short circuit between different electrodes.

[Brief description of drawings]

FIG. 1 is a side sectional view of an ozone generator which is an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view of the same.

FIG. 4 is also an electric circuit diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrode unit 2A ... 2F 1st ... 6th rod-shaped electrode 3 Discharge space 7 Discharge space 4A ... 4F Dielectric 5 Metal cylinder 8 Top end cover 9 Flow port 10A ... 10F 1st ... 6th electrode terminal 11 Bottom end cover 12 flow port 13A ... 13F 1st ... 6th electrode terminal 14 high voltage applying means H1 predetermined distance H2 predetermined distance

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiromitsu Sato, Hiroshi Sato 3-201 Minamiyoshikata, Tottori-shi, Tottori Sanyo Denki Co., Ltd. (72) Kenji Taniguchi 3-201 Minamiyoshikata, Tottori-shi, Tottori Sanyo Denki Incorporated (72) Inventor Masami Fukumoto 3 201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd.

Claims (5)

[Claims] 1. An electrode unit composed of a plurality of rod-shaped electrodes arranged in parallel with each other at equal intervals and having a polygonal planar shape, a dielectric material provided outside the rod-shaped electrodes, and an electrode unit of the electrode unit. A metal cylinder provided on the outer side; and high voltage applying means for applying an AC high voltage to each of the rod-shaped electrode and the metal cylinder or at least the rod-shaped electrode, and between the rod-shaped electrodes and between the rod-shaped electrodes via the dielectric. An ozone generator which induces a silent discharge between a rod-shaped electrode and the metal cylinder. 2. The rod-shaped electrode is arranged such that the distance between the adjacent electrodes and the distance between the rod-shaped electrode and the metal cylinder are substantially equal to each other. Ozone generator. 3. The rod-shaped electrode and the upper and lower parts of the metal cylinder are
An upper and lower end cover having a flow port and supporting the ends of the rod-shaped electrode and the metal cylinder is provided, and the flow port is connected to a discharge space formed inside the electrode unit. The ozone generator according to item 1. 4. The upper and lower end cover is provided with an electrode terminal that is connected to an end of the rod-shaped electrode and a cylindrical body terminal that is connected to a metal cylindrical body, and the high voltage applying means is the electrode terminal and the cylindrical body terminal. 4. The ozone generator according to claim 3, wherein the upper and lower end covers of the electrode terminals are alternately provided for each adjacent electrode terminal. 5. The ozone generator according to claim 4, wherein the tubular terminal is led out from an end cover which is provided in a part of the metal tubular body and is different from the electrode terminal adjacent to the tubular terminal. apparatus.