JP2015048270A - Ozone generator and conductive member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozone generator which allows reduction of parts in which a contact resistance occurs in connection parts connecting fuses mutually and a conductive member.SOLUTION: An ozone generator includes a container, three or more dielectric members, first electrodes, a cylindrical second electrode, fuses and a connection part. The dielectric members have a cylindrical part and are provided in the container; the first electrodes are provided on the inner peripheral surface of the cylindrical part; the second electrode is provided in the container and covers the outer peripheral surface of the cylindrical part in a state where an electric discharge gap is formed between the outer peripheral surface of the cylindrical part and the second electrode; the fuses have a first terminal connected electrically to the first electrode and a second terminal connected electrically to a power source and are provided in each first electrode; and the connection part is provided with three or more binding parts bound to the second terminal of the fuses, which differ from each other, has a first conductive member and is connected electrically with the fuse.

Description

  Embodiments described herein relate generally to an ozone generator and a conductive member.

  Conventionally, a cylindrical derivative member made of a derivative, a first electrode provided on the inner peripheral surface of the derivative member, and a second electrode covering the derivative member with a discharge gap between the derivative member and There is an ozone generator equipped. In this ozone generator, dielectric barrier discharge (silent discharge) is performed between the first electrode and the second electrode, and ozone is generated from the raw material gas passing between the first electrode and the second electrode.

  As this type of ozone generator, a fuse is provided between the first electrode and the power source, the fuses are electrically connected by a connecting portion, and the connecting portion is formed by a plurality of conductive members that connect two fuses to each other. What is composed is known. In such a configuration, contact resistance is generated at the overlapping portion of the conductive members in the connection portion.

JP 2010-228973 A Japanese Patent No. 3557733

  In this type of ozone generator, as an example, it is desired to reduce the number of places where contact resistance is generated in a connection portion where fuses are connected.

  The ozone generator of the embodiment includes a container, three or more dielectric members, a first electrode, a cylindrical second electrode, a fuse, and a connection portion. The dielectric member has a cylindrical portion and is provided in the container. The first electrode was provided on the inner peripheral surface of the cylindrical portion. The second electrode is provided in the container and covers the outer peripheral surface of the cylindrical portion with a discharge gap formed between the second electrode and the outer peripheral surface of the cylindrical portion. The fuse has a first terminal electrically connected to the first electrode and a second terminal electrically connected to a power source, and is provided for each first electrode. The connection portion includes a first conductive member provided with three or more coupling portions coupled to the second terminals of the fuses different from each other, and electrically connects the fuses.

FIG. 1 is a schematic diagram illustrating an example of an ozone generator according to the first embodiment. FIG. 2 is a cross-sectional view showing a part of an example of the ozone generator according to the first embodiment. FIG. 3 is a schematic diagram illustrating a part of an example of the ozone generator according to the first embodiment. FIG. 4 is a diagram illustrating an example of a first conductive member included in the ozone generator according to the first embodiment. FIG. 5 is a diagram illustrating an example of a second conductive member included in the ozone generator according to the first embodiment. FIG. 6 is a schematic diagram illustrating a part of an example of an ozone generator according to the second embodiment.

  Hereinafter, embodiments will be described in detail with reference to the drawings. Note that similar components are included in the following embodiments. Therefore, in the following, common reference numerals are given to those similar components, and redundant description is omitted.

[First Embodiment]
In the present embodiment, as an example, as shown in FIG. 1, an ozone generator 1 includes a container 2 and an ozone generator that is contained in the container 2 and generates ozone from a source gas by dielectric barrier discharge (silent discharge). 3 is provided. The source gas contains oxygen, for example, dry air or oxygen gas.

  The container 2 includes, as an example, a cylindrical (tubular) tube portion 2a (tubular portion, base portion, main body portion), and end wall portions 2b and 2c provided at both axial ends of the tube portion 2a. Have. In the present embodiment, as an example, the end wall portion 2c is configured as a door that can be opened and closed with respect to the cylindrical portion 2a. As an example, the cylinder portion 2a is provided with a gas inlet 2d through which the raw material gas flows and a gas outlet 2e through which the ozone generated by the ozone generator 3 flows out. As an example, the cylindrical portion 2a is provided with a coolant inlet 2f and a coolant outlet 2g. The container 2 can be comprised by stainless steel as an example.

  As shown in FIGS. 1 and 2, the ozone generator 3 includes, as an example, a plurality of electrode tubes 4 (dielectric electrodes) and metal electrodes 5 that cover (enclose) the electrode tubes 4. . The electrode tube 4 is also referred to as a discharge tube.

  The electrode tube 4 is formed in a cylindrical shape (tubular shape) with one end closed and the other end open. As an example, three or more (plural) electrode tubes 4 are provided, and are disposed in the container 2 so as to be substantially parallel to each other and spaced apart from each other. As an example, the center axis of the cylinder of the electrode tube 4 is substantially parallel to the center axis of the cylindrical portion 2 a of the container 2. For example, as shown in FIG. 2, the electrode tube 4 is provided on a cylindrical (tubular or tubular) dielectric member 6 having one end closed and the other end open, and an inner surface of the dielectric member 6. Electrode coating layer 7 formed.

  As an example, the dielectric member 6 includes a cylindrical tube portion 6a and a wall portion 6b in which one end portion of the tube portion 6a is closed. The dielectric member 6 is made of a dielectric material. Examples of the dielectric of the dielectric member 6 include glass such as quartz glass, borosilicate glass, high silicate glass, aluminum silicate glass, and ceramics.

  The electrode coating layer 7 (first electrode, high potential side electrode) is made of a conductive material. The electrode coating layer 7 is provided, for example, on the inner surface of the dielectric member 6 including the inner peripheral surface 6c of the cylindrical portion 6a. The electrode coating layer 7 is formed on the inner surface of the dielectric member 6 by sputtering, spraying, vapor deposition, electroless plating, electrolytic plating, coating, or the like of a conductive material. The conductive material of the electrode coating layer 7 is, for example, gold, silver, copper, stainless steel, chromium, tin, zinc, nickel carbon or the like.

  The electrode coating layer 7 is electrically connected to a power source 9 (FIG. 1) through a fuse 8. The fuse 8 cuts off the electrical connection between the power source 9 and the electrode coating layer 7 when a current exceeding a specified value flows. As an example, the fuse 8 has a cylindrical shape (bar shape) and has one end 8a (first end) and the other end 8b (second end) opposite to the one end 8a. doing. The fuse 8 has a pair of terminals 8c and 8d. One terminal 8c (first terminal) is provided at one end 8a, and the other terminal 8d (second terminal) is provided at the other end 8b. The fuse 8 is inserted into the electrode tube 4 (dielectric member 6) and partly protrudes from the electrode tube 4. In the present embodiment, as an example, at least a part of the terminal 8 c is located inside the electrode tube 4, and at least a part of the terminal 8 d is located outside the electrode tube 4. The terminal 8 c is electrically connected to the electrode coating layer 7 through the conductive connection portion 10. The connection unit 10 can be configured by one or a plurality of members. In the present embodiment, as an example, the connection portion 10 includes a metal supply electron coupled to the terminal 8c, and a stainless steel wool material (cushion material) interposed between the electron supply and the electrode coating layer 7, have. On the other hand, the terminal 8 d is electrically connected to the power source 9 via the connection portion 11. The terminal 8d is provided with a female screw 8e (coupling portion) as an example. Details of the connection unit 11 will be described later. A fuse holder 12 is interposed between the fuse 8 and the dielectric member 6. For example, the fuse holder 12 has a plate shape and is attached to the fuse 8. Here, the electrode coating layer 7 (electrode tube 4) is supplied with power (high voltage power) from the power source 9 and functions as a high potential side electrode.

  Further, the metal electrode 5 (second electrode) is provided for each electrode tube 4 (electrode coating layer 7) and is accommodated in the container 2. As an example, the metal electrode 5 is cylindrical (tubular). An electrode tube 4 is inserted inside the metal electrode 5, and the metal electrode 5 faces the outer peripheral surface 6d of the cylindrical portion 6a. A spacer 13 is interposed between the metal electrode 5 and the electrode tube 4 (cylindrical portion 6a), and the metal electrode 5 and the electrode tube 4 are positioned coaxially. In addition, a discharge gap 14 (space, gap) is provided between the inner peripheral surface 5 a of the metal electrode 5 and the outer peripheral surface 6 d of the cylindrical portion 6 a of the electrode tube 4. That is, the metal electrode 5 covers the outer peripheral surface 6d of the cylindrical portion 6a in a state where the discharge gap 14 is opened between the metal electrode 5 and the outer peripheral surface 6d of the cylindrical portion 6a. For example, the metal electrode 5 is made of stainless steel.

  One end of each metal electrode 5 is coupled (integrated) to each other by a wall 15, and the other end of each metal electrode 5 is coupled (integrated) to each other by a wall 16. The plurality of metal electrodes 5 and the walls 15 and 16 are integrated to form a metal electrode assembly 17. The metal electrode assembly 17 is grounded, and the metal electrode 5 functions as a low potential side electrode.

  In the present embodiment, as an example, the metal electrode assembly 17 is provided with a coolant passage 18. As an example, the coolant passage 18 is defined by the outer peripheral surface 5b of the metal electrode 5, the opposing surfaces of the walls 15 and 16, and the like. The cooling liquid passage 18 communicates with the cooling liquid inlet 2f and the cooling liquid outlet 2g, and the cooling liquid (for example, cooling water) flowing from the cooling liquid inlet 2f passes through the cooling liquid passage 18 and passes through the cooling liquid passage 18. It flows out from the outlet 2g.

  In the above configuration, the source gas supplied from the gas inlet 2 d into the container 2 flows through the discharge gap 14 between the dielectric member 6 and the metal electrode 5. At this time, in the ozone generator 1, an AC voltage is applied from the power source 9 via the fuse 8 and the connecting portion 10 between the electrode coating layer 7 (electrode tube 4) and the metal electrode 5, and the discharge gap 14 is inserted. A dielectric barrier discharge is generated to generate ozone from the source gas passing through the discharge gap 14. The generated ozone-containing gas flows out from the gas outlet 2e. At this time, the coolant supplied from the coolant inlet 2 f to the coolant passage 18 flows out of the coolant outlet 2 g through the coolant passage 18. This cooling liquid cools the heat generated by the dielectric barrier discharge.

  Next, the connection part 11 to which a plurality of fuses 8 are connected (coupled) will be described in detail. In the present embodiment, as an example, as illustrated in FIG. 3, the connection portion 11 includes two types (a plurality) of conductive members 21 and 22. In the present embodiment, the conductive member 21 is an example of a first conductive member, and the conductive member 22 is an example of a second conductive member.

  3 and 4, as an example, the conductive member 21 has two or more (six as an example) first parts 21a and a second part 21b connecting the first parts 21a. doing. As an example, the conductive member 21 is formed in a thin flat plate shape. For example, the conductive member 21 is made of a conductive material such as stainless steel.

  As an example, the first part 21a is formed in a plate-like bar shape, and has one end 21e and the other end 21f. One end 21e of the first part 21a is connected by the second part 21b. In the present embodiment, as an example, the plurality of first portions 21a extend radially from the second portion 21b. Specifically, the plurality of first portions 21a are arranged at equiangular intervals.

  The first part 21a and the second part 21b are provided with a coupling part 21c coupled to the terminal 8d of the fuse 8 and electrically connected to the terminal 8d. A hole 21d is provided in the coupling portion 21c. The coupling portion 21c is a portion including the peripheral edge portion of the hole 21d. As an example, the hole 21d of the first part 21a is provided in the other end portion 21f and is formed as a long hole. On the other hand, the hole 21d of the second part 21b is provided in the central part of the second part 21b as an example, and is formed in a circular shape. The screw 23 (the coupling tool, FIG. 2) inserted into the hole 21d is coupled to the female screw 8e of the terminal 8d, whereby the coupling portion 21c and the terminal 8d of the fuse 8 are coupled. In FIG. 2, the first part 21a is omitted, but the first part 21a is also coupled to the fuse 8 by a screw 23 inserted into the hole 21c. The coupling portion 21c of the conductive member 21 is coupled to the terminals 8d of the fuses 8 that are different from each other.

  As shown in FIGS. 3 and 5, the conductive member 22 is formed in a plate-like rod shape as an example. At both ends of the conductive member 22, a coupling portion 22 c coupled to the terminal 8 d of the fuse 8 and electrically connected to the terminal 8 d is provided. A hole 22d is provided in the coupling portion 22c. The coupling portion 22c is a portion including the peripheral edge portion of the hole 22d. Each hole 22d is formed as a long hole as an example. The coupling part 21c and the terminal 8d of the fuse 8 are coupled by coupling the screw (coupling tool) inserted into the hole 21d with the female thread 8e of the terminal 8d. Although the screw is omitted in FIG. 3, this screw has the same configuration as that of the screw 23, and hence this screw is also referred to as the screw 23 hereinafter. The coupling portion 22 c of the conductive member 22 is coupled to the terminals 8 d of the fuses 8 that are different from each other.

  In this embodiment, as an example, as shown in FIG. 3, seven electrode tubes 4 (dielectric members 6) are provided, and the one electrode tube is surrounded so as to surround one electrode tube 4 located at the center. The other six electrode tubes 4 are arranged around the same circle. Each of these electrode tubes 4 is provided with a fuse 8 (not shown in FIG. 3). That is, in the present embodiment, as an example, seven fuses 8 are provided, and other six fuses 8 are arranged on the same circle around the one fuse 8 so as to surround one fuse 8 located at the center. Is arranged. Conductive member 21 is overlaid on terminal 8 d of fuse 8, conductive member 22 is overlaid on the opposite side of terminal 8 d of conductive member 21, and conductive members 21 and 22 are coupled to fuse 8 by screw 23. . At this time, the coupling portion 21 c of the second portion 21 b of the conductive member 21 is coupled to the terminal 8 d of the fuse 8 located at the center, and the coupling portion 21 c of the first portion 21 a of the conductive member 21 is around the central fuse 8. Are connected to the terminal 8d of the fuse 8 located on the same circle. The conductive member 22 is coupled to the terminal 8 d of the adjacent fuse 8 among the six fuses 8 positioned around the center fuse 8. In the present embodiment, adjacent (adjacent) fuses 8 are coupled to each other by a conductive member 21 or a conductive member 22. In the present embodiment, in the connection portion 11, a plurality of (six as an example) triangular portions 11 a are configured by the conductive members 21 and 22, and each coupling portion 21 c and 22 c is located at the apex portion of the triangular portion 11 a. ing. By connecting the fuses 8 as described above, the fuses 8 can be firmly connected. Thereby, for example, when the ozone generator 1 is being transported or when the end wall 2c (door) of the container 2 is opened, the position of the fuse 8 can be prevented from shifting. Further, it is possible to suppress the load from being concentrated on some of the fuses 8. Further, at this time, the hole 21d of the first part 21a of the conductive member 21 and the hole 22d of the conductive member 22 are long holes, and there is play at the time of mounting. It can suppress that 8 is loaded.

  In the above configuration, in the fuse 8 positioned around the fuse 8 positioned in the center, the first portion 21a of the conductive member 21 and the two conductive members 22 overlap each other. There are two places where contact resistance occurs, but in the fuse 8 located at the center, there is no contact resistance between the conductive members 21 and 22 because the conductive members 21 and 22 do not overlap. Here, when all the fuses 8 are connected to each other only by the conductive member 22, that is, when six conductive members 22 are provided instead of the conductive member 21, the conductive member 22 in the fuse 8 located at the center is provided. Since there are six overlaps, there are five places where contact resistance occurs between the conductive members 22. That is, in this embodiment, the number of places where contact resistance is generated is smaller than when all the fuses 8 are connected to each other only by the conductive member 22.

  As described above, in the present embodiment, the conductive member 21 of the connection portion 11 is provided with three or more coupling portions 21c coupled to the terminals 8d of the fuses 8 different from each other. Therefore, it is possible to reduce the number of locations where contact resistance is generated in the connection portion 11 as compared to the case where all the fuses 8 are connected by the conductive member 22 alone. Thereby, the electric energy required at the time of the driving | operation of the ozone generator 1 can be reduced. That is, the energy saving operation of the ozone generator 1 is possible. Therefore, the yield [g / kW] (ozone generation amount [g] per 1 kW of electric power) that is an index value regarding the operation efficiency of the ozone generator 1 can be improved. Further, the number of the conductive members 21 and 22 (the number of parts) of the connecting portion 11 can be reduced as compared with the case where all the fuses 8 are connected by the conductive member 22 alone.

  In the present embodiment, the conductive member 21 includes two or more first parts 21a each having one end 21e and the other end 21f and provided with one coupling part 21c, and two or more first parts. And a second portion 21b provided with one coupling portion 21c connected to one end portion 21e of 21a. Therefore, according to the present embodiment, the second part 21b does not have to be overlapped with the other conductive members 21 and 22, so the contact resistance at the second part 21b is made smaller than the contact resistance at the first part 21a. be able to.

  The first conductive member is not limited to the conductive member 21 and may be, for example, a combination of the conductive members 21 and 22. In this case, the connection part 11 has only one first conductive member.

[Second Embodiment]
In the present embodiment, as shown in FIG. 6, the number of electrode tubes 4 is larger than that in the first embodiment, and the connection portion 11 includes a plurality of conductive members 21 and a plurality of conductive members 22. Different from the embodiment. In FIG. 6, the conductive members 21 and 22 are schematically shown. Specifically, the conductive member 21 is indicated by a solid line, and the second portion 21b of the conductive member 21 is indicated by a relatively large black circle. Further, the conductive member 22 is indicated by a one-dot chain line. Moreover, the coupling | bonding location (overlap location) of the electrically-conductive members 21 and 22 is shown by the comparatively small black circle.

  In the present embodiment, similarly to the first embodiment, in the overlapping portion of the conductive member 21 and the conductive member 22, the conductive member 21 is overlapped with the terminal 8d of the fuse 8, and the conductive member 21 is opposite to the fuse 8. The conductive member 22 is overlaid on the surface. Moreover, in this embodiment, the 2nd part 21b of the electrically-conductive member 21 is not overlapped with the other electrically-conductive members 21 and 22 similarly to 1st Embodiment.

  According to the present embodiment described above, since the connecting portion 11 has the conductive member 21, the location where the contact resistance is generated in the connecting portion 11 is limited to the conductive member 22 as in the first embodiment. This can be reduced compared to the case where all the fuses 8 are connected. In addition, the number of the conductive members 21 and 22 of the connection portion 11 can be reduced as compared with the case where all the fuses 8 are connected by the conductive member 22 alone. Therefore, the number of assembling steps for the conductive members 21 and 22 can be reduced. According to the present embodiment, as an example, when the number of electrode tubes 4 (fuses 8) is 364, the number of parts can be reduced by about 60% compared to the case where the fuses 8 are coupled only by the conductive member 22, and the contact resistance is reduced. The number of occurrences can be reduced by about 30%.

  Here, the connecting portion 11 may be configured by a conductive member (first conductive member) in which the plurality of conductive members 21 and the plurality of conductive members 22 are integrated. In this case, the contact resistance location and the number of parts can be greatly reduced. However, in this configuration, when a certain fuse 8 is replaced, it is necessary to remove all the screws 23 and release the connection between the conductive member and all the fuses 8, which is troublesome. On the other hand, in the present embodiment, since the fuses 8 are coupled to each other by the plurality of conductive members 21 and the plurality of conductive members 22, all the conductive members are replaced when one fuse 8 is replaced. By removing only a predetermined part of 21 and 22, it can be set as the structure which can replace | exchange the fuse 8, and the fall of the workability | operativity of the fuse 8 is suppressed. That is, in the present embodiment, it is possible to reduce the number of locations where contact resistance occurs (reduction in the number of parts) while suppressing a decrease in the workability for replacing the fuse 8.

  As described above, according to the embodiment, it is possible to obtain the ozone generator 1 and the conductive member 21 that can reduce the locations where contact resistance is generated in the connection portion 11 where the fuses 8 are connected.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  For example, the number of coupling portions 21c (first portion 21a) of the conductive member 21 is not limited to seven, and may be three or more.

  DESCRIPTION OF SYMBOLS 1 ... Ozone generator, 2 ... Container, 5 ... Metal electrode (2nd electrode), 6 ... Dielectric member, 6a ... Cylindrical part, 6c ... Inner peripheral surface, 6d ... Outer peripheral surface, 7 ... Electrode coating layer (first Electrode), 8 ... fuse, 8c ... terminal (first terminal), 8d ... terminal (second terminal), 9 ... power supply, 11 ... connection part, 14 ... discharge gap, 21 ... conductive member (first conductive member), 21a ... first part, 21b ... second part, 21c ... coupled part, 21e ... one end part, 21f ... other end part, 22 ... conductive member (second conductive member), 22c ... coupled part.

Claims (5)

A container,
Three or more dielectric members having a cylindrical portion and provided in the container;
A first electrode provided on an inner peripheral surface of the cylindrical portion;
A cylindrical second electrode that is provided in the container and covers the outer peripheral surface of the cylindrical portion with a discharge gap formed between the outer peripheral surface of the cylindrical portion,
A first terminal electrically connected to the first electrode, and a second terminal electrically connected to a power source, and a fuse provided for each first electrode;
Three or more coupling parts coupled to the second terminals of the fuses different from each other are provided, the first conductive member is provided, and the connection part electrically connecting the fuses,
Ozone generator equipped with.   The first conductive member is connected to two or more first parts having one end and another end and provided with the one coupling part, and the one or more first parts of the two or more first parts. The ozone generator according to claim 1, further comprising: a second portion provided with one of the coupling portions.   The ozone generator according to claim 2, wherein the two or more first parts extend radially from the second part.   The ozone generator according to any one of claims 1 to 3, wherein the connection portion includes a second conductive member provided with two coupling portions coupled to the second terminals of the fuses different from each other. .   A container, a cylindrical portion, and three or more dielectric members provided in the container; a first electrode provided on an inner peripheral surface of the cylindrical portion; and the cylinder provided in the container, A cylindrical second electrode that covers the outer peripheral surface of the cylindrical portion with a discharge gap between the first terminal, a first terminal electrically connected to the first electrode, and a power source A second terminal electrically connected, and a fuse provided for each of the first electrodes, and a connection part electrically connecting each of the fuses, the connection part of the ozone generator And a conductive member provided with three or more coupling portions coupled to the second terminals of the fuses different from each other.

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