JP2023007606A - Ozon generating body and ozone generating device - Google Patents

Abstract

To secure sufficient insulation properties between conductor parts.SOLUTION: An ozone generating body 3 has a first electrode 10, a first dielectric body 11 covering the first electrode 10, a second electrode 30, a second dielectric body 31 which covers the second electrode 30 and has a discharge space DS provided between the first dielectric body 11 and the second dielectric body 31, a first conductor part 3B which is electrically connected to the first electrode 10, and extends from one end side in a perpendicular direction perpendicular to an arrangement direction of the first dielectric body 11 and the second dielectric body 31 in the first dielectric body 11, and a second conductor part 3C which is electrically connected to the second electrode 30, and extends from one end side in a perpendicular direction in the second dielectric body 31. A resin member 90 is provided between the first conductor part 3B and the second conductor part 3C so that the first conductor part 3B and the second conductor part 3C are insulated.SELECTED DRAWING: Figure 12

Description

The present invention relates to ozone generators and ozone generators.

Patent Literature 1 discloses an ozone generator. This ozone generator includes a pair of electrodes and a pair of dielectrics covering each of the pair of electrodes. This ozone generator generates ozone by dielectric barrier discharge by applying a voltage between electrodes while taking in gas.

JP 2016-172676 A

In the ozone generator disclosed in Patent Document 1, since a high voltage is applied between electrodes, an insulation distance (space distance, creepage distance, etc.) between conductors (wiring, etc.) electrically connected to each electrode distance) must be ensured. However, in the ozone generator as disclosed in Patent Document 1, each conductor is led out to the same side from each dielectric. Therefore, there is a possibility that sufficient insulation cannot be secured between the conductor portions.

The present invention provides an ozone generator and an ozone generator that can ensure sufficient insulation between conductor portions.

[1] The ozone generator of the present invention comprises a first electrode, a first dielectric covering the first electrode, a second electrode, covering the second electrode, and a discharge space provided between the first dielectric. and a first conductor electrically connected to the first electrode and extending from one end of the first dielectric in a direction orthogonal to the direction in which the first dielectric and the second dielectric are arranged. and a second conductor portion electrically connected to the second electrode and extending from one end side of the second dielectric in the orthogonal direction. A thermosetting resin is provided between the first conductor and the second conductor to insulate the first conductor and the second conductor.

According to this configuration, since the first conductor and the second conductor extend from one end side of the first dielectric and the second dielectric, respectively, the distance between the first conductor and the second conductor is short. turn into. However, the thermosetting resin is provided between the first conductor portion and the second conductor portion, and the first conductor portion and the second conductor portion are insulated from each other. Insulation between the portion and the second conductor portion can be ensured.

[2] An insulating member, which is a member different from the thermosetting resin provided between the first conductor and the second conductor, is provided between the first dielectric and the second dielectric. may be

According to this configuration, the insulation between the first dielectric and the second dielectric can be ensured while easily setting the distance between the first dielectric and the second dielectric by the insulating member.

[3] The first conductor portion has a first terminal electrically connected to the first electrode, the second conductor portion has a second terminal electrically connected to the second electrode, The first terminal has a first connecting portion electrically connected to the first electrode, and a first projecting portion connected to the first connecting portion and projecting toward one end side from an end portion of the first dielectric. The second terminal has a second connecting portion electrically connected to the second electrode, and a second projecting portion connected to the second connecting portion and projecting in the same direction as the first projecting portion. may The insulating member includes a spacer portion arranged between the first dielectric and the second dielectric, an extension portion extending from the spacer portion and arranged between the first protrusion and the second protrusion, may have

According to this configuration, the extended portion can ensure insulation between the first projecting portion and the second projecting portion, so that the first terminal and the second terminal can be more reliably insulated.

[4] A holder that holds the first dielectric and the second dielectric with the insulating member sandwiched therebetween, and a holder that accommodates and holds at least part of the holder may be provided.

According to this configuration, the first dielectric and the second dielectric can be held by the holding portion while the gap between the first dielectric and the second dielectric is kept constant by the insulating member and the holder.

[5] The first conductor may have a first terminal having a first connecting portion electrically connected to the first electrode. The second conductor portion may have a second terminal having a second connection portion electrically connected to the second electrode. The first terminal may be arranged on the side of the first dielectric opposite to the insulating member, and the second terminal may be arranged on the side of the second dielectric opposite to the insulating member. The holder may have cutouts that expose the first terminal and the second terminal. The first terminal and the second terminal may be covered with a thermosetting resin provided inside the notch.

According to this configuration, the insulation between the first terminal and the second terminal can be ensured while the distance between the first dielectric and the second dielectric is kept constant by the insulating member and the holder.

[6] The holder may have a second notch that exposes the discharge space.

According to this configuration, it is possible to allow the gas to flow into the discharge space through the second notch while surrounding the outer peripheries of the first dielectric and the second dielectric with the holder. Therefore, it is possible to suppress a decrease in the amount of gas flowing into the discharge space due to the provision of the holder.

[7] The first conductor portion has a first terminal electrically connected to the first electrode and a first wiring electrically connected to the first terminal, and the second conductor portion You may have the 2nd terminal electrically connected to two electrodes, and the 2nd wiring electrically connected to the 2nd terminal. The first conductor may have a first wiring electrically connected to the first terminal, and the second conductor may have a second wiring electrically connected to the second terminal. The first wiring and the second wiring may be surrounded by thermosetting resin.

According to this configuration, the first wiring and the second wiring can be fixed by the thermosetting resin, and play between the first wiring and the second wiring can be suppressed.

[8] The ozone generator according to any one of the above [1] to [7], a gas flow path, and a fan for feeding the gas from the inlet side of the flow path to the outlet side. may be The ozone generator may generate ozone in the flow path using the air sucked from the intake port as a raw material.

According to this configuration, any one of the above [1] to [7] ozone generators can be applied to the ozone generator.

ADVANTAGE OF THE INVENTION According to this invention, sufficient insulation is securable between conductor parts.

FIG. 1 is a perspective view of the ozone generator of the first embodiment. FIG. 2 is a cross-sectional perspective view of the ozone generator. 3 is a cross-sectional view of the ozonizer in a cross-section different from that of FIG. 2. FIG. FIG. 4 is a perspective view of an ozone generator. FIG. 5 is a view of the ozone generator as seen from the short direction. FIG. 6 is a view of the ozonizers viewed from the row direction. FIG. 7 is an exploded perspective view of the ozone generator. FIG. 8 is a perspective view showing the state before attaching the holder for the ozone generator. 9 is a cross-sectional view taken along the line AA of FIG. 6. FIG. FIG. 10 is a perspective view showing a state in which the ozone generator is held by the holding portion with the resin member omitted. 11 is a cross-sectional view of the ozonizer shown in FIG. 10, with the ozonizer section cut along the longitudinal direction. FIG. 12 is a view corresponding to FIG. 11 in a state where the resin member is not omitted. FIG. 13 is a block diagram showing the electrical configuration of the ozone generator.

1. First Embodiment 1-1. Configuration of Ozone Generator 100 The ozone generator 100 shown in FIG. 1 is a device that draws in outside air (air containing oxygen), generates ozone from the oxygen in the air by dielectric barrier discharge, and discharges the ozone to the outside. . The ozone generator 100 has a gas flow path 1, a fan 2, and an ozone generator 3, as shown in FIGS.

The flow path 1 has an intake port 5 and an exhaust port 6 . The intake port 5 takes in gas (for example, air) outside the ozone generator 100 into the flow path 1 . The exhaust port 6 discharges the gas inside the flow path 1 to the outside of the ozone generator 100 . The flow path 1 allows the gas sucked from the intake port 5 to be discharged from the exhaust port 6 .

The flow path 1 extends along a predetermined Z direction (vertical direction in this embodiment). The intake port 5 is arranged on one end side in the Z direction (lower end side in this embodiment) and opens on one end side in the Z direction (downward in this embodiment). The intake direction of the intake port 5 is the other end side in the Z direction (upward in this embodiment). The exhaust port 6 is arranged on the other end side in the Z direction (upper end side in this embodiment) and opens on the other end side in the Z direction (upper side in this embodiment). The exhaust direction of the exhaust port 6 is the other end side in the Z direction (upward in this embodiment).

The intake ports 5 are arranged along an annular shape (specifically, an annular shape) with the Z direction as the axial direction. The exhaust port 6 is arranged inside the annular portion where the intake port 5 is arranged. The exhaust ports 6 are arranged in a circular shape.

The flow path 1 has a first flow path 7 and a second flow path 8 downstream of the first flow path 7 . The first flow path 7 extends from the intake port 5 toward the exhaust port 6 side. The first flow path 7 guides the gas sucked from the annular intake port 5 to the inner side of the inner periphery of the intake port 5 . The second flow path 8 extends from the downstream end of the first flow path 7 toward the exhaust port 6 toward the other end in the Z direction (upward in this embodiment). A downstream end of the second flow path 8 is connected to the exhaust port 6 . The second flow path 8 has a smaller outer shape than the inner periphery of the annular intake port 5, guides the gas guided inward by the first flow path 7 toward the exhaust port 6 side (upward in this embodiment), and exhausts the gas. It is discharged from the mouth 6.

The fan 2 is a device that generates an airflow (specifically, a swirling flow) in the flow path 1, and is an axial fan in this embodiment. The fan 2 performs a blowing operation of sending gas from the inlet port 5 side of the flow path 1 toward the outlet port 6 side. The fan 2 has a motor (not shown). The fan 2 is driven by a motor when electric power is supplied, and blows air. The fan 2 is provided in the flow path 1 (specifically, the second flow path 8). The fan 2 is arranged with the central axis of the fan 2 directed in the Z direction. The fan 2 rotates with the Z direction as its axial direction.

When an AC voltage is applied to the ozone generator 3, the ozone generator 3 generates a dielectric barrier discharge in a discharge space DS, which will be described later, and generates ozone in the flow path 1 using oxygen in the air sucked from the intake port 5 as a raw material. It is. As shown in FIG. 10, the ozone generator 3 includes an ozone generating portion 3A, a holding portion 70, a first mating terminal 71, a second mating terminal 72, a screw 73, an AC power supply 74, a resin and a member 90 (see FIG. 12). First, the ozone generator 3A will be described in detail. As shown in FIGS. 4 to 7, the ozone generating section 3A includes a first electrode 10, a second electrode 30, a first dielectric 11, a second dielectric 31, a first terminal 12, and a second electrode. It has a terminal 32 and a support portion 50 .

The first electrode 10 and the second electrode 30 are made of metal, and are made of tungsten (W) in this embodiment. Note that the first electrode 10 and the second electrode 30 are not limited to tungsten, and may be made of, for example, molybdenum (Mo), silver (Ag), copper (Cu), platinum (Pt), or the like. The first electrode 10 and the second electrode 30 are formed as thin metal layers and are elongated in a predetermined direction. The thickness of the first electrode 10 and the second electrode 30 (metal layer) is desirably 10 μm or more from the viewpoint of ensuring adhesion strength, and is desirably 50 μm or less from the viewpoint of suppressing peeling due to excessive thickness. . The width and length of the first electrode 10 and the second electrode 30 are arbitrarily set according to the required ozone generation amount. The width WE (see FIG. 6) of the first electrode 10 and the second electrode 30 is set to 1 mm. The lengths of the first electrode 10 and the second electrode 30 are set based on the length LE (see FIG. 5) of the portion where the support portion 50 does not exist between the first electrode 10 and the second electrode 30 . The length LE is assumed to be 10 mm.

The first dielectric 11 and the second dielectric 31 are made of alumina (Al ₂ O ₃ ) in this embodiment. Note that the first dielectric 11 and the second dielectric 31 are not limited to alumina, and may be another ceramic such as glass (SiO ₂ ), aluminum nitride (AlN), yttrium oxide (Y ₂ O ₃ ), or a mixture thereof. It may be formed as a material. A first dielectric 11 covers the first electrode 10 and a second dielectric 31 covers the second electrode 30 . Each of the first dielectric 11 and the second dielectric 31 has a plate shape.

The first dielectric 11 and the second dielectric 31 are arranged side by side in the thickness direction of the first dielectric 11 and the second dielectric 31 . That is, the first dielectric 11 and the second dielectric 31 face each other in the thickness direction of the first dielectric 11 and the second dielectric 31 . A discharge space DS is formed between the first dielectric 11 and the second dielectric 31 . The surfaces facing each other are flat surfaces and have a rectangular shape. One of the surfaces facing each other extends along the other surface. One of the surfaces facing each other may or may not be parallel to the other surface. The thickness direction of the first electrode 10 and the second electrode 30 is the same as the thickness direction of the first dielectric 11 and the second dielectric 31 . The alignment direction of the first dielectric 11 and the second dielectric 31 is hereinafter referred to as the "alignment direction".

The first electrode 10 is arranged at a position closer to the second electrode 30 in the first dielectric 11 in the alignment direction. The second electrode 30 is arranged at a position closer to the first electrode 10 in the second dielectric 31 in the alignment direction. The first electrode 10 and the second electrode 30 are arranged by printing or the like on the upper surface of a thin dielectric layer. By forming a thicker dielectric layer thereon, the first dielectric 11 covering the first electrode 10 and the second dielectric 31 covering the second electrode 30 are manufactured.

The thickness of the first dielectric 11 closer to the discharge space DS than the first electrode 10 (the distance between the surface of the first electrode 10 facing the discharge space DS and the surface of the first dielectric 11 facing the discharge space DS) is D1 (see FIG. 5). The thickness of the second dielectric 31 closer to the discharge space DS than the second electrode 30 (the distance between the surface of the second electrode 30 facing the discharge space DS and the surface of the second dielectric 31 facing the discharge space DS) is D2 (see FIG. 5). In this case, the minimum value of D1+D2 is obtained by the following formula (1).
(Minimum value of D1+D2)=(Voltage [kV] applied to the ozone generator 3A)/(Withstand voltage (kV/mm) of the material of the first dielectric 11 and the second dielectric 31 Equation (1)
The withstand voltage of alumina is 15 kV/mm, and if the peak value of the high AC voltage is 4.5 kV, the minimum value of D1+D2 is 0.3 mm.
On the other hand, if D1 and D2 are too thick, the loss in the first dielectric 11 and the second dielectric 31 will increase and the power efficiency will decrease. Therefore, the maximum value of D1+D2 is about twice the minimum value of D1+D2. Specifically, D1+D2 is preferably 0.3 mm or more and 0.6 mm or less. That is, D1 and D2 are preferably 0.15 mm or more and 0.3 mm or less, respectively. In this embodiment, D1 and D2 are each set to 0.15 mm in consideration of ease of manufacture.

The extending direction (longitudinal direction) of the first electrode 10 and the second electrode 30 is the same as the longitudinal direction of the first dielectric 11 and the second dielectric 31 (hereinafter simply referred to as "longitudinal direction"). The longitudinal direction corresponds to an example of "an orthogonal direction perpendicular to the alignment direction of the first dielectric and the second dielectric". Note that the lateral directions of the first dielectric 11 and the second dielectric 31 are hereinafter simply referred to as "transverse directions".

The first dielectric 11 has a first dielectric body 13 , a first protrusion 14 and a first recess 15 . The first dielectric body 13 has a plate shape and a rectangular parallelepiped shape. A first dielectric body 13 covers the first electrode 10 . The first protruding portion 14 protrudes to the outside of the first dielectric 11 (the side opposite to the second dielectric 31 side) on one end side in the longitudinal direction. The first projecting portion 14 is formed over the entire widthwise region of the first dielectric 11 . The first projecting portion 14 is formed up to one end in the longitudinal direction of the first dielectric 11 . The first recessed portion 15 is formed on the outer surface of the first dielectric 11 (the side opposite to the second dielectric 31 side) on one end side in the longitudinal direction. The first recessed portion 15 is formed by recessing the first projecting portion 14 . The first recess 15 opens at one longitudinal end of the first dielectric 11 .

The second dielectric 31 has a second dielectric body 33 , a second protrusion 34 and a second recess 35 . The second dielectric body 33 is plate-shaped and rectangular parallelepiped-shaped. A second dielectric body 33 covers the second electrode 30 . The second dielectric body 33 faces the first dielectric body 13 and forms a discharge space DS between itself and the first dielectric body 13 . The second protruding portion 34 protrudes to the outside of the second dielectric 31 (the side opposite to the first dielectric 11 side) on one end side in the longitudinal direction. The second protruding portion 34 is formed over the entire widthwise region of the second dielectric 31 . The second projecting portion 34 is formed up to one end in the longitudinal direction of the second dielectric 31 . The second recessed portion 35 is formed on the outer surface of the second dielectric 31 (the side opposite to the first dielectric 11 side) on one end side in the longitudinal direction. The second recessed portion 35 has a shape in which the second projecting portion 34 is recessed. The second recess 35 opens at one longitudinal end of the second dielectric 31 .

Interdielectric gap GC (see FIG. 5), which is the distance between the first dielectric 11 (specifically, the first dielectric body 13) and the second dielectric 31 (specifically, the second dielectric body 33) Considering that the withstand voltage of air is about 3.0 kV/mm, when the peak value of the AC voltage applied to the ozone generator 3A is 4.5 kV, the discharge should be less than 1.5 mm. There is a need to. However, in order to lengthen the discharge time and maintain stable discharge, it is preferable to set the thickness to 1/3 or less, that is, 0.5 mm or less. On the other hand, if the inter-dielectric gap GC becomes too small, the supplied air will be insufficient and the amount of ozone generated will decrease. Therefore, the dielectric gap GC is preferably 0.2 mm or more. For example, the dielectric gap GC is preferably 0.37 mm. Note that the inter-dielectric gap GC is the position of the tip (the other end in the longitudinal direction) of the first electrode 10 and the second electrode 30 when the opposing surfaces of the first dielectric 11 and the second dielectric 31 are not parallel to each other. based on

The first electrode 10 and the second electrode 30 have the same size and shape, and are arranged in a plane-symmetrical positional relationship. The first dielectric 11 and the second dielectric 31 have the same size and the same shape, and are arranged in a plane-symmetrical positional relationship.

The first terminal 12 and the second terminal 32 are each made of metal and have a plate shape. The first terminal 12 is arranged on the side of the first dielectric 11 opposite to the spacer 51 side. The second terminal 32 is arranged on the side of the second dielectric 31 opposite to the spacer 51 side. The first terminal 12 is arranged in the first recess 15 and the second terminal 32 is arranged in the second recess 35 . The first terminal 12 is electrically connected to the first electrode 10 and the second terminal 32 is electrically connected to the second electrode 30 . The first terminal 12 and the second terminal 32 are L-shaped when viewed in the lateral direction.

The first terminal 12 has a first connecting portion 21 , a first projecting portion 22 and a third connecting portion 23 . The first connection portion 21 is electrically connected to the first electrode 10 via a first conductive portion 24 provided on the first dielectric 11, as shown in FIGS. The first conductive portion 24 is a via formed in the first dielectric 11 in this embodiment. The first conductive portion 24 extends from the first electrode 10 to the outer surface of the first dielectric 11 (the side opposite to the second dielectric 31 side). The first conductive portion 24 is exposed on the outer surface of the first dielectric 11 (the side opposite to the second dielectric 31 side), and a land is formed on the exposed portion of the first conductive portion 24 . The first connecting portion 21 is brazed to this land. This electrically connects the first terminal 12 to the first electrode 10 . The first protruding portion 22 is connected to one end of the first connecting portion 21 and protrudes further to the one end side than the end of the first dielectric 11 . The third connection portion 23 is bent from the tip (the end on the one end side) of the first projecting portion 22 and extends in the row direction.

The second terminal 32 has a second connection portion 41 , a second projecting portion 42 and a fourth connection portion 43 . The second connection portion 41 is electrically connected to the second electrode 30 via a second conductive portion 44 provided on the second dielectric 31 . The second conductive portion 44 is a via formed in the second dielectric 31 in this embodiment. The second connection portion 41 is connected to the second electrode 30 in the same manner as the connection between the first connection portion 21 and the first electrode 10 described above. The second protruding portion 42 is connected to one end of the second connecting portion 41 and protrudes further to the one end side than the end portion of the second dielectric 31 . The fourth connecting portion 43 is bent from the tip (the end on the one end side) of the second projecting portion 42 and extends in the row direction. The third connection portion 23 and the fourth connection portion 43 extend in directions opposite to each other.

The support part 50 supports the first dielectric 11 and the second dielectric 31 . The support portion 50 cantilevers the first dielectric 11 and the second dielectric 31 at one end in the longitudinal direction. That is, the support portion 50 cantilevers the first dielectric 11 and the second dielectric 31 on the same side. The support portion 50 has a spacer 51 and a holder 52 . The holder 52 is made of, for example, resin (eg, PE, PP, PS, ABS, PVC, PET, POM, PC, PBT, PPS, PEI, PTFE, PAI, etc.), ceramic, or the like.

The spacer 51 corresponds to an example of the "insulating member" of the present disclosure. The spacer 51 is arranged between the first dielectric 11 and the second dielectric 31 at one end in the longitudinal direction, and between the first dielectric 11 and the second dielectric 31 at the other end in the longitudinal direction. A discharge space DS is formed. The spacer 51 is a member different from the resin member 90 described later. That is, the spacer 51 is a single component (a component that is not a combination of a plurality of independent components) and is configured separately from the resin member 90 . The spacer 51 is integrated with the resin member 90 after the resin member 90 is formed. 2), it is configured as a single component. The spacer 51 has a plate shape. The spacer 51 is arranged with the thickness direction facing the direction in which the first dielectric 11 and the second dielectric 31 are arranged. The spacer 51 includes a spacer portion 53 arranged between the first dielectric 11 and the second dielectric 31 , and a first projecting portion 22 and a second projecting portion 42 extending from the spacer portion 53 toward one end side in the longitudinal direction. and an extension portion 54 disposed between. In this way, the spacer 51 can easily set the distance between the first dielectric 11 and the second dielectric 31 while ensuring insulation between the first conductor 3B and the second conductor 3C.

The spacer portion 53 has a plate shape. The spacer portion 53 fits within the range of the first dielectric 11 and the second dielectric 31 in the lateral direction. One end in the longitudinal direction of the spacer portion 53 is arranged on the other end side of one end in the longitudinal direction of the first dielectric 11 and the second dielectric 31, and the other end in the longitudinal direction of the spacer portion 53 is arranged on the first overhang. It is arranged closer to one end than the other ends of the portion 14 and the second projecting portion 34 .

The extending portion 54 has a plate shape. The extension portion 54 is thinner than the spacer portion 53 . The extension portion 54 does not have to be thinner than the spacer portion 53 , and may have the same thickness as the spacer portion 53 , for example. The extending portion 54 extends outside both ends of the first terminal 12 and the second terminal 32 in the lateral direction. The extending portion 54 extends further to the one end side than the ends of the first terminal 12 and the second terminal 32 on the one end side in the longitudinal direction.

The ozone generator 3A has a double-faced tape 55 for adhering the first dielectric 11 and the second dielectric 31 to the spacer 51 . The first dielectric 11 and the second dielectric 31 are each adhered to the spacer portion 53 of the spacer 51 with double-sided tape 55 . Note that an adhesive may be applied to the spacer 51 instead of the double-sided tape 55 .

The spacer 51 is made of, for example, resin (eg, PE, PP, PS, ABS, PVC, PET, POM, PC, PBT, PPS, PEI, PTFE, PAI), ceramic, or the like. As an example of this embodiment, the spacer 51 is made of PET.

The holder 52 is a member that holds the first dielectric 11 and the second dielectric 31 with the spacer 51 interposed therebetween. The holder 52 has an annular shape (specifically, a prismatic shape) and is arranged so as to surround the outer peripheries of the first dielectric 11 and the second dielectric 31 with the spacer 51 interposed therebetween. Note that the holder 52 may be annular, or may be other than annular. The holder 52 has a holder main body 56 , a locking portion 57 , a first notch portion 58 and a second notch portion 59 .

The holder main body 56 has an annular shape (specifically, a rectangular tubular shape). Note that the holder main body 56 may be annular, or may be other than annular. The holder main body 56 has a pair of first wall portions 56A arranged on both sides in the row direction, and a pair of second wall portions 56B arranged on both sides in the width direction.

The locking portion 57 protrudes inward from the inner surface of the holder main body 56 on the other end side in the longitudinal direction. The locking portions 57 protrude from the inner surfaces of the pair of first wall portions 56A. The locking portion 57 is formed over the entire widthwise region of the first wall portion 56A.

The first notch portion 58 has a form of notching so as to expose the first terminal 12 and the second terminal 32 . The first notch portion 58 is formed by notching the end portion of the pair of first wall portions 56A on the one end side in the longitudinal direction.

The second cutout portion 59 has a cutout shape to expose the discharge space DS. The second notch portion 59 is formed by notching the end portion of the pair of second wall portions 56B on the other end side in the longitudinal direction. One longitudinal end of the second notch 59 is arranged closer to the other end than the other longitudinal end of the first notch 58 . It is preferable that the width (interval in the row direction) of the second notch 59 is larger than the inter-dielectric gap GC.

As shown in FIG. 8, the holder 52 is inserted through the first dielectric 11 and the second dielectric 31 sandwiching the spacer 51 from the other end side in the longitudinal direction. The holder 52 is positioned by bringing the locking portion 57 into contact with the longitudinal ends of the first projecting portion 14 of the first dielectric 11 and the second projecting portion 34 of the second dielectric 31 . As shown in FIG. 9, in the arrangement direction, the distance between the outer surfaces of the first dielectric body 13 and the second dielectric body 33 with the spacer 51 interposed therebetween is L1, and the outer surfaces of the first dielectric body 13 and the second dielectric body 33 with the spacer 51 interposed therebetween are L1. The distance between the outer surfaces of the first projecting portion 14 and the second projecting portion 34 is L2, the minimum distance between the inner surfaces of the pair of second wall portions 56B of the holder 52 is L3, and the pair of locking portions of the holder 52 is defined as L2. When the distance between the inner surfaces of 57 is L4, the following equations (2) and (3) hold.
L1≦L4 Expression (2)
L4<L2≦L3 Expression (3)

As shown in FIGS. 2 and 3, the ozonizer 100 includes a flow passage forming portion 60, a peripheral wall portion 61, a bottom portion 62, a ceiling portion 63, a finger guard 64, an intake portion 65, and a diffusion plate 66. and have

The flow path forming part 60 is a part that forms the flow path 1 . A channel 1 is provided inside the channel forming portion 60 . The flow path forming portion 60 has a structure in which it is divided into a plurality (two in this embodiment) of divided bodies in the circumferential direction. Specifically, the flow path forming part 60 has a first divided body 60A and a second divided body 60B divided in the circumferential direction, and is configured by connecting the first divided body 60A and the second divided body 60B. be done.

The peripheral wall portion 61 has an annular shape (specifically, a cylindrical shape, more specifically, a cylindrical shape), and has a form that surrounds the flow path forming portion 60 and the flow path 1 . The outer diameter of the ozone generator 100 (the outer diameter of the peripheral wall portion 61) is, for example, 225 mm, and the height of the ozone generator 100 is, for example, 204 mm.

The bottom portion 62 is a portion that is placed on the placement surface. The bottom portion 62 supports the flow path forming portion 60 arranged on the upper side. The bottom portion 62 is configured to fit inside the intake port 5 that is arranged in an annular shape. Also, the bottom portion 62 has an outer shape smaller than the inner circumference of the peripheral wall portion 61 .

The ceiling part 63 is arranged on the other end side of the ozone generator 100 in the Z direction, and has an annular shape with the Z direction as the axial direction. An exhaust port 6 is formed inside the ceiling portion 63 . The ceiling portion 63 has an outer periphery connected to the other end portion (upper end portion in this embodiment) of the peripheral wall portion 61 and is formed integrally with the peripheral wall portion 61 . The peripheral wall portion 61 and the ceiling portion 63 are arranged above the flow passage forming portion 60 with the finger guard 64 interposed therebetween and are supported by the flow passage forming portion 60 . The peripheral wall portion 61 is supported in a state of floating from the mounting surface.

The finger guard 64 is a planar (disk-shaped in this embodiment) portion having a plurality of through holes. The through hole is formed in a slit shape. The finger guard 64 has a function of allowing the flow path 1 to be exhausted while suppressing foreign matter (for example, a finger) from entering from the outside. The finger guard 64 is configured as a separate member from the flow path forming portion 60 and the ceiling portion 63 . The finger guard 64 is arranged downstream of the diffuser plate 66 .

The intake portion 65 is a portion forming the intake port 5 and has an annular shape. The intake portion 65 is arranged between the inner peripheral side of the lower end side of the peripheral wall portion 61 and the outer peripheral side of the upper end side of the bottom portion 62 and is locked to the flow path forming portion 60 . The intake portion 65 is formed with a plurality of intake ports 5 . The plurality of air intake ports 5 are arranged in an annular fashion along the annular air intake portion 65 . The intake port 5 has a shape elongated in the radial direction.

The diffusion plate 66 diffuses the ozone generated by the ozone generator 3 into the flow path 1 . The diffusion plate 66 is arranged downstream of the ozone generator 3 in the flow path 1 . The diffuser plate 66 has a form protruding inward from the wall surface 1A of the channel 1 . The diffusion plate 66 protrudes from a portion of the wall surface 1A in the circumferential direction. The width of the diffuser plate 66 decreases with increasing distance from the wall surface 1A. The diffusion plate 66 has a sector shape. The diffusion plate 66 is arranged at a position overlapping the ozone generator 3 when viewed from the other end side in the Z direction. The diffusion plate 66 is formed integrally with the flow path forming portion 60 (specifically, the first divided body 60A).

As shown in FIGS. 3, 10 and 12, the ozone generator 100 includes a holding portion 70, a first mating terminal 71, a second mating terminal 72, a screw 73, an AC power supply 74, a resin a member 90; The first mating terminal 71 corresponds to the "first wiring" of the present disclosure. The second mating terminal 72 corresponds to the "second wiring" of the present disclosure. The first mating terminal 71 is electrically connected to the first terminal 12 . The second mating terminal 72 is electrically connected to the second terminal 32 . The first mating terminal 71 and the first terminal 12 constitute a first conductor portion 3B. The first conductor portion 3B is electrically connected to the first electrode 10, and is on one end side of the first dielectric 11 in the orthogonal direction perpendicular to the direction in which the first dielectric 11 and the second dielectric 31 are arranged (that is, one end in the longitudinal direction). A second conductor portion 3</b>C is configured by the second mating terminal 72 and the second terminal 32 . The second conductor portion 3C is electrically connected to the second electrode 30 and extends from the second dielectric 31 from one longitudinal end side (the same side as the first conductor portion 3B).

As shown in FIG. 12, the first conductor portion 3B (more specifically, the first connection portion 21 and the first projecting portion 22), the second conductor portion 3C (more specifically, the second connection portion 41 and the second projecting portion 42) face each other in the alignment direction. The first conductor portion 3B (more specifically, the first connecting portion 21 and the first projecting portion 22) and the second conductor portion 3C (more specifically, the second connecting portion 41 and the second projecting portion) facing each other 42) is provided with a resin member 90 (thermosetting resin) to be described later.

The holding portion 70 is a portion that holds the ozone generating portion 3A. The holding portion 70 has a first accommodating portion 75 , a terminal fixing portion 76 and a second accommodating portion 77 . The first housing portion 75 has a bottom surface 75B and an enclosing portion 75C that protrudes from the bottom surface 75B and surrounds the outer periphery of the holder 52 . One longitudinal end of the holder 52 is accommodated in the first accommodation portion 75 . At least part of the holder 52 protrudes from the open end of the first housing portion 75 . In this manner, the first dielectric 11 and the second dielectric 31 are held by the holding portion 70 while the space between the first dielectric 11 and the second dielectric 31 is kept constant by the spacer 51 and the holder 52 . be able to.

The first housing portion 75 has a notch groove 75A into which the first terminal 12 and the second terminal 32 of the ozone generating portion 3A are fitted. The terminal fixing portion 76 is provided corresponding to each of the first terminal 12 and the second terminal 32 . Terminal fixing portion 76 has a female screw portion. The third connection portion 23 of the first terminal 12 is fastened together with the first mating terminal 71 by a screw 73 to one terminal fixing portion 76 . The fourth connecting portion 43 of the second terminal 32 is fastened together with the second mating terminal 72 by a screw 73 to the other terminal fixing portion 76 . The first mating terminal 71 and the second mating terminal 72 are electrically connected to an AC power supply 74, respectively.

The second accommodation portion 77 accommodates one longitudinal end of the ozone generating portion 3A accommodated in the first accommodation portion 75, and accommodates at least the first terminal 12 and the second terminal 32 as a whole. The inside of the second accommodating portion 77 is resin-molded with a thermosetting resin up to a position where at least the first terminals 12 and the second terminals 32 are entirely buried. That is, a resin member 90 made of a thermosetting resin is provided inside the second housing portion 77 . The resin member 90 is also embedded inside the first accommodating portion 75 . The first conductor portion 3B and the second conductor portion 3C are embedded in a thermosetting resin (resin member 90). A thermosetting resin is provided between the first conductor portion 3B and the second conductor portion 3C to insulate the first conductor portion 3B and the second conductor portion 3C. Insulation between the first conductor 3B and the second conductor 3C can be ensured by the thermosetting resin (resin member 90), and current leakage occurs between the first conductor 3B and the second conductor 3C. can be suppressed. In addition, the first conductor portion 3B and the second conductor portion 3C can be brought closer to one end in the longitudinal direction (cantilever structure), and the ozone generator 3 can be made compact. Furthermore, as described above, the spacer portion 53 (extending portion 54) is arranged between the first terminal 12 (first projecting portion 22) and the second terminal 32 (second projecting portion 42). The terminal 12 and the second terminal 32 can be insulated more reliably. The first terminal 12 and the second terminal 32 are covered with a thermosetting resin (resin member 90 ) provided inside the first notch 58 . As shown in FIG. 12, part of the first dielectric 11 (one end in the longitudinal direction) and part of the second dielectric 31 (one end in the longitudinal direction) are embedded in the resin member 90. (The surface exposed on the opening side of the second housing portion 77) is positioned below (on the bottom side of the second housing portion 77) the lower end (one end in the longitudinal direction) of the second notch portion 59. As shown in FIG. At least part of the holder 52 (specifically, at least the other end of the second notch 59 in the longitudinal direction) protrudes from the molded resin.

Thermosetting resins forming the resin member 90 are, for example, PF, EP (epoxy resin), PUR, DAP, and SI. As an example of the present embodiment, the thermosetting resin forming the resin member 90 is formed using EP as a material.

The resin member 90 has a first portion 91, a second portion 92, and a pair of third portions 93, as shown in FIG. The first portion 91 is filled in the lower end side inside the first accommodating portion 75 . The first portion 91 is U-shaped in the cross-sectional view shown in FIG. 12 and covers the lower end portion of the extension portion 54 . The second portion 92 is filled between the lower end of the first dielectric 11 , the lower end of the second dielectric 31 , the first terminal 12 and the second terminal 32 . The second portion 92 sandwiches the upper end portion of the extension portion 54 in the alignment direction. The first portion 91 and the second portion 92 are integrally connected and filled in the first accommodating portion 75 . The first portion 91 and the second portion 92 are heated and softened, for example, and then filled into the first housing portion 75 through the notch groove 75A (see FIG. 11) of the first housing portion 75, and then hardened. is molded by

As shown in FIG. 12, the pair of third portions 93 sandwiches the first terminal 12 (specifically, the first projecting portion 22) and the second terminal 32 (specifically, the second projecting portion 42). . The third portion 93 on the first dielectric 11 side is filled in the first notch portion 58 of the holder 52 and the first concave portion 15 of the first dielectric 11 . The third portion 93 on the first dielectric 11 side covers the third connecting portion 23 of the first terminal 12 from above. The third portion 93 on the first dielectric 11 side is filled up to the inside of the bent portion of the first terminal 12 (the portion between the first projecting portion 22 and the third connecting portion 23). The third portion 93 on the second dielectric 31 side fills the first notch 58 of the holder 52 and the second recess 35 of the second dielectric 31 . The third portion 93 on the second dielectric 31 side covers the fourth connection portion 43 of the second terminal 32 from above. The third portion 93 on the second dielectric 31 side is filled up to the inside of the bent portion of the second terminal 32 (the portion between the second projecting portion 42 and the fourth connecting portion 43).

As shown in FIG. 12 , the first mating terminal 71 and the second mating terminal 72 are surrounded by the resin member 90 . Therefore, the first mating terminal 71 and the second mating terminal 72 can be fixed by the resin member 90 to suppress play. The resin member 90 covers the head of each screw 73 from above.

The holding portion 70 is fixed to the outer surface of the flow path forming portion 60 . The holding part 70 is arranged outside the wall surface 1A of the flow path 1, as shown in FIG. The support portion 50 of the ozone generating portion 3A is held outside the wall surface 1A. As a result, one longitudinal end of the first dielectric 11 and one longitudinal end of the second dielectric 31 are supported by the passage forming portion 60 . A wall surface 1A of the flow path 1 is formed with an opening 1B through which the ozone generating section 3A protrudes inward. The first dielectric 11 and the second dielectric 31 of the ozone generating section 3A are arranged in a state of protruding from the opening 1B to the inside of the wall surface 1A. At least part of the first electrode 10 and at least part of the second electrode 30 are arranged inside the wall surface 1A. Further, the holder 52 is also arranged in a state of protruding from the opening 1B to the inside of the wall surface 1A. As a result, the other longitudinal end of the first dielectric 11 and the other longitudinal end of the second dielectric 31 are separated from the inner wall surface (wall surface 1A) of the flow path forming portion 60 .

AC power supply 74 may have a transformer and provide AC power. The AC power supply 74 generates desired AC power based on the power supplied from the commercial power supply outside the ozone generator 100, and supplies it to the ozone generator 3A and the like.

The ozone generator 100 has a control section 80, an operation section 81, an ozone detection section 82, a display section 83, and a sound output section 84, as shown in FIG. The control section 80 controls the operation of the ozone generator 100 . The control unit 80 is mainly composed of a microcomputer, and has a CPU, a ROM, a RAM, a drive circuit, and the like.

The operation unit 81 is, for example, a switch whose ON/OFF state is switched by pressing, and is, for example, a tact switch. A signal indicating the operation result of the operation unit 81 is input to the control unit 80 . The ozone detector 82 detects the concentration of ozone in the air outside the ozone generator 100 . A signal indicating the detection value of the ozone detector 82 is input to the controller 80 .

The controller 80 can control the operation of the ozone generator 3A via the AC power supply 74 . The controller 80 can adjust the amount of ozone generated by the ozone generator 3A by controlling the AC voltage applied to the ozone generator 3A. The control unit 80 can adjust the amount of ozone generated based on the operation result of the operation unit 81 . Based on the ozone concentration detected by the ozone detector 82, the controller 80 can feedback-control the operation of the ozone generator 3A so that the ozone concentration approaches the target value.

The controller 80 can control the operation of the fan 2 . The control unit 80 PWM-controls the fan 2 by giving a PWM signal to the fan 2 . Thereby, the controller 80 can adjust the air volume.

The control section 80 can control the operation of the display section 83 . The display unit 83 is, for example, an LED lamp. The display unit 83 indicates the ON/OFF state of the power supply, the operating state of the fan 2, the external ozone concentration, and the like, depending on the lighting state of the LED.

The control section 80 can control the operation of the sound output section 84 . The sound output unit 84 outputs sound, such as a buzzer. The sound output unit 84 outputs an alarm sound, for example, when an abnormality occurs in the ozone generator 100 .

1-2. Effects of the First Embodiment In the first embodiment, a thermosetting resin (resin member 90) is provided between the first conductor portion 3B and the second conductor portion 3C, and the first conductor portion 3B and the second conductor portion 3C is insulated. Therefore, since the first conductor portion 3B and the second conductor portion 3C are configured to extend from one end side of the first dielectric 11 and the second dielectric 31, respectively, the first conductor portion 3B and the second conductor portion 3C The distance becomes closer. However, the thermosetting resin (resin member 90) is provided between the first conductor portion 3B and the second conductor portion 3C, and the first conductor portion 3B and the second conductor portion 3C are insulated. Insulation between the first conductor portion 3B and the second conductor portion 3C can be ensured by the thermosetting resin (resin member 90).

Furthermore, the ozone generator 3 is a member different from the thermosetting resin (resin member 90 ) and has a spacer 51 arranged between the first dielectric 11 and the second dielectric 31 . Therefore, it is possible to easily set the distance between the first dielectric 11 and the second dielectric 31 by the spacer 51 and ensure insulation between the first dielectric 11 and the second dielectric 31 .

Further, the spacer 51 has an extension portion 54 extending from the spacer portion 53 and arranged between the first protrusion 22 and the second protrusion 42 . Therefore, the insulation between the first projecting portion 22 and the second projecting portion 42 can be ensured by the extension portion 54, so that the first terminal 12 and the second terminal 32 can be insulated more reliably.

Further, a holder 52 that holds the first dielectric 11 and the second dielectric 31 with the spacer 51 sandwiched therebetween, and a holder 70 that accommodates and holds at least part of the holder 52 are provided. Therefore, it is possible to hold the first dielectric 11 and the second dielectric 31 by the holding portion 70 while maintaining a constant distance between the first dielectric 11 and the second dielectric 31 by the spacer 51 and the holder 52 . can be done.

Furthermore, the first terminal 12 and the second terminal 32 are covered with a thermosetting resin (resin member 90) provided inside the first notch 58. As shown in FIG. Therefore, the spacer 51 and the holder 52 can keep the distance between the first dielectric 11 and the second dielectric 31 constant while ensuring insulation between the first terminal 12 and the second terminal 32 .

Further, the holder 52 has a second notch 59 which is cut to expose the discharge space DS. Therefore, while the holder 52 surrounds the first dielectric 11 and the second dielectric 31 , it is possible to allow gas to flow into the discharge space DS through the second notch 59 . Therefore, it is possible to suppress a decrease in the amount of gas flowing into the discharge space DS due to the provision of the holder 52 .

Further, the first mating terminal 71 electrically connected to the first terminal 12 and the second mating terminal 72 electrically connected to the second terminal 32 are formed by thermosetting resin (resin member 90). besieged. Therefore, the first mating terminal 71 and the second mating terminal 72 can be fixed by the thermosetting resin (resin member 90), and the play of the first mating terminal 71 and the second mating terminal 72 is suppressed. can.

<Other embodiments>
The present invention is not limited to the embodiments explained by the above description and drawings, and the following embodiments are also included in the technical scope of the present invention. In addition, various features of the embodiments described above and the embodiments described later may be combined in any way as long as they are consistent combinations.

Although the Z direction is the vertical direction in the first to third embodiments, it is not limited to the vertical direction. For example, the Z direction may be a direction that is inclined with respect to the vertical direction.

It should be noted that the embodiments disclosed this time should be considered as examples in all respects and not restrictive. The scope of the present invention is not limited to the embodiments disclosed this time, and includes all modifications within the scope indicated by the claims or within the scope equivalent to the claims. is intended.

REFERENCE SIGNS LIST 1 flow path 3 ozone generator 3A ozone generator 3B first conductor 3C second conductor 5 intake port 6 exhaust port 10 first electrode 11 first dielectric 12 first terminal 21... First connecting part 22... First projecting part 30... Second electrode 31... Second dielectric material 32... Second terminal 41... Second connecting part 42... Second projecting part 43... Fourth connecting part 51... Spacer ( insulating material)
52... Holder 53... Spacer portion 54... Extended portion 58... First notch portion (notch portion)
59... Second notch 70... Holding part 71... First mating terminal (first wiring)
72... Second mating terminal (second wiring)
90... Resin member 100... Ozone generator DS... Discharge space

Claims (8)

a first electrode;
a first dielectric covering the first electrode;
a second electrode;
a second dielectric covering the second electrode and provided with a discharge space between the first dielectric;
a first conductor electrically connected to the first electrode and extending from one end of the first dielectric in a direction orthogonal to the direction in which the first dielectric and the second dielectric are arranged;
a second conductor portion electrically connected to the second electrode and extending from one end side of the second dielectric in the orthogonal direction;
with
An ozonizer in which a thermosetting resin is provided between the first conductor and the second conductor, and the first conductor and the second conductor are insulated. An insulating member, which is a member different from the thermosetting resin provided between the first conductor and the second conductor, is provided between the first dielectric and the second dielectric. The ozone generator according to claim 1. The first conductor has a first terminal electrically connected to the first electrode,
The second conductor has a second terminal electrically connected to the second electrode,
The first terminal includes a first connecting portion electrically connected to the first electrode, and a first protrusion connected to the first connecting portion and protruding toward the one end side from an end portion of the first dielectric. and
The second terminal has a second connecting portion electrically connected to the second electrode, and a second projecting portion connected to the second connecting portion and projecting in the same direction as the first projecting portion. death,
The insulating member includes a spacer portion arranged between the first dielectric and the second dielectric, and an insulating member extending from the spacer portion and arranged between the first protrusion and the second protrusion. 3. The ozone generator of claim 2, further comprising: a holder that holds the first dielectric and the second dielectric sandwiching the insulating member;
a holding part that accommodates and holds at least part of the holder;
The ozone generator according to claim 2 or 3, comprising: the first conductor portion has a first terminal having a first connection portion electrically connected to the first electrode;
the second conductor portion has a second terminal having a second connection portion electrically connected to the second electrode;
The first terminal is arranged on the side of the first dielectric opposite to the insulating member,
the second terminal is arranged on the side opposite to the insulating member side of the second dielectric,
The holder has a cutout portion that exposes the first terminal and the second terminal,
5. The ozone generator according to claim 4, wherein said first terminal and said second terminal are covered with a thermosetting resin provided inside said notch. 6. The ozonizer according to claim 4, wherein said holder has a second notch portion which is notched so as to expose said discharge space. The first conductor portion has a first terminal electrically connected to the first electrode and a first wiring electrically connected to the first terminal,
The second conductor portion has a second terminal electrically connected to the second electrode and a second wiring electrically connected to the second terminal,
7. The ozone generator according to claim 5, wherein said first wiring and said second wiring are surrounded by a thermosetting resin. an ozone generator according to any one of claims 1 to 7;
a gas flow path;
a fan that feeds gas from the inlet side of the flow path toward the outlet side;
has
The ozone generator is an ozone generator that generates ozone in the flow path using the air sucked from the intake port as a raw material.

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