JP2001048502A - Mechanism for setting gap of ozonizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism capable of precisely setting a gap between opposed dielectric layers at an extremely narrow prescribed value in an ozonizer. SOLUTION: This mechanism is designed to set a gap 4 between dielectric layers 10 and 20 at a prescribed value in an ozonizer composed by arranging the dielectric layers 10 and 20 which are metallic electrodes 1 and 2 so as to be mutually opposite at the gap 4 kept therebetween. Furthermore, the mechanism is provided with recessed parts 12 and 22 formed in the opposite surfaces 11 and 21 so as to be mutually opposite and a bead member 3 fitted between both the recessed parts 12 and 22. The dimensions and shapes of the recessed parts 12 and 22 and the bead member 3 are formed so that the gap 4 is the prescribed value when the bead member 3 is fitted into the recessed parts 12 and 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gap setting mechanism for setting a gap between opposing dielectric layers in an ozone generator to a predetermined value.

[0002]

2. Description of the Related Art The basic principle of a flat plate type ozone generator is that a plate-like metal electrode is opposed to a dielectric layer provided on an opposed surface, and oxygen is supplied to the gap between the opposed dielectric layers while flowing the oxygen into the gap. This causes a silent discharge, thereby converting oxygen to ozone. In such an ozone generator, the generation efficiency of ozone is improved as the gap between the opposing dielectric layers is smaller.

[0003]

As a mechanism for setting the gap to a predetermined value, a spacer mechanism in which a spacer made of an insulator is interposed between opposing dielectric layers has been generally used. However, the spacer mechanism has the following problems. Since Teflon or ceramic is used as the spacer,
There is a limit in processing the spacer to an extremely thin and accurate thickness, and therefore, there is a limit in improving the ozone generation efficiency by setting the gap to be narrow. If pressure is applied to both metal electrodes from both sides so as to sandwich the spacer, if the pressure is high, the thickness of the spacer shrinks, and the gap may not be set to a predetermined value.

An object of the present invention is to provide a mechanism capable of precisely setting the gap to a very small predetermined value.

[0005]

According to the first aspect of the present invention,
A pair of plate-shaped metal electrodes is formed so that a dielectric layer formed on one surface thereof is opposed to each other with a gap therebetween, and ozone is generated by causing a silent discharge in the gap while flowing oxygen through the gap. In the generated ozone generator, a mechanism for setting the gap between the opposing dielectric layers to a predetermined value, a concave portion formed so as to oppose the opposing surface of both metal electrodes and a concave portion opposing each other A ball member fitted over the recess, and the dimensions of the concave portion and the ball member are formed such that when the ball member is fitted into the concave portion of both opposing surfaces, the gap between the opposing surfaces has a predetermined value. It is characterized by having.

FIG. 1 is a sectional view showing the principle of the gap setting mechanism of the present invention. This mechanism is based on the opposing surfaces 1 of the metal electrodes 1 and 2.
The gap 4 is secured between the facing surfaces 11 and 21 by fitting and sandwiching the ball member 3 between the concave portions 12 and 22 formed in the recesses 12 and 21. FIG.
FIG. 3 is a perspective view showing a state before the fitting is performed, and FIG. 3 is a perspective view showing a state where the fitting is performed.

The ball member 3 has a so-called abacus ball shape. That is, two cones 31 and 32 of the same size and shape.
Are joined at the bottom surfaces and each top is cut out by the same amount. The recesses 12 and 22 are conical holes of the same size and shape.

As shown in FIG. 1, the diameter D1 of the ball member 3 and the angle α1 of the tapered surfaces of the cones 31 and 32 with respect to the horizontal plane, and the diameter D2 of the openings of the recesses 12 and 22 and the opposed surfaces of the tapered surfaces. By setting the angle α2, the gap 4 is secured. That is, α1 = α2, and D1
If> D2, the ball member 3 fits tightly into the concave portions 12 and 22, and a part is exposed from the concave portions 12 and 22, and the exposed portion is formed, whereby the gap 4 is secured. At this time, the values of D1, D2, α1, and α2 can be precisely set to the order of several μm by machining.
Is set at an accuracy of the order of several μm. By making the difference between D1 and D2 extremely small, the predetermined value T becomes extremely small and the gap 4 becomes extremely narrow. In addition, even if the pressure for sandwiching the ball member 3 is applied to the electrodes 1 and 2, the ball member 3 does not shrink, so that the set predetermined value T is maintained as it is. Therefore, according to the gap setting mechanism of the present invention, the gap 4 can be set to be extremely narrow with high accuracy.

Further, since the ball member 3 is fitted in the concave portions 12 and 22, the ball member 3 prevents the electrodes 1 and 2 from shifting from each other in the lateral direction.

The cones 31, 32 of the ball member 3
May be made different as shown in FIG.
In that case, the concave portions 12 and 22 also have different dimensions and shapes according to the cones 31 and 32. In addition, ball member 3
May be formed of pyramids 311 and 321 as shown in FIG. 5 instead of the cones 31 and 32. In that case, the concave portion is also a pyramidal hole according to the pyramids 311 and 321. Although FIG. 5 shows a quadrangular pyramid, the present invention is not limited to this, and may be a triangular pyramid or another polygonal pyramid.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) In the drawings for explaining the present embodiment, the same reference numerals as those shown in FIGS. FIG. 6 is a perspective view of an ozone generator employing the gap setting mechanism of the present invention, and FIG. 7 is a sectional view taken along line VII-VII of FIG. This ozone generator includes a pair of plate-like metal electrodes 1 and 2.
The dielectric layers 10 and 20 each formed on one surface thereof are arranged so as to face each other with a gap 4 therebetween. Silent discharge is caused in the gap 4 while flowing oxygen through the gap 4. To generate ozone.

The gap setting mechanism of this ozone generator is shown in FIG.
As shown in the figure, the mechanism is composed of mechanical elements 100 provided at three places. FIG. 7 shows one mechanical element 100.
The mechanism element 100 includes opposing surfaces 11, 21 of the metal electrodes 1, 2.
And the ball members 3 fitted over the concave portions 12 and 22. The mechanism element 100 is also provided with a fixing mechanism using the bolt 5. The ball member 3 has the shape of an abacus ball similar to the ball member 3 described with reference to FIGS. 1 to 3 and is made of, for example, ceramic. In addition, as shown in FIG. 8, the ball member 3 has a
3 are formed.

Next, a method of forming the gap setting mechanism having the above-described configuration will be described. First, as shown in FIG.
Concave portions 12 and 2, which are conical holes,
2 is formed with high precision by machining. Next, as shown in FIG. 10, the dielectric layers 10 and 20 are formed on the facing surfaces 11 and 21. At this time, the dielectric layers 10 and 20 are also formed on the inner surfaces of the concave portions 12 and 22. Next, as shown in FIG. 11, through holes 13 and 23 are formed to pass through the metal electrodes 1 and 2 in the thickness direction through the bottom points 121 and 221 of the concave portions 12 and 22. Then, as shown in FIG. 12, the ball member 3 is fitted into the concave portions 12 and 22, and the bolt 5 is inserted into the through hole 1 of the metal electrode 1.
3, through-hole 33 of ball member 3, and through-hole 2 of metal electrode 2
3 and fastened with a nut 51.

In the clearance setting mechanism having the above structure, FIG.
3, the angle α1 of the ball member 3 and the angle α2 of the recesses 12 and 22 are the same, and the diameter D1 of the ball member 3 is slightly larger than the diameter D2 of the recesses 12 and 22. As a result, the ball member 3 is tightly fitted into the concave portions 12 and 22, and a part of the ball member 3 is exposed from the concave portions 12 and 22, and the exposed portion is formed, whereby the gap 4 is secured. D above
The values of 1, D2, α1, and α2 are several μm by machining.
Can be set precisely to the order and the dielectric layers 10 and 2
Since the thickness of 0 can be set precisely to the order of several μm,
The predetermined value T of the gap 4 is set with an accuracy on the order of several μm. By making the difference between D1 and D2 extremely small, the predetermined value T becomes extremely small, and the gap 4 becomes extremely narrow and precise. Become.

For example, the dimensions of the metal electrodes 1 and 2 are 250 ×
To set the dimension T of the gap 4 to 0.10 mm when the thickness is 250 mm and the thickness is 20 mm, for example, the dimension and shape of the ball member 3 are set to D1 = 40 mm, α1 = 20 °, and D2 = 39.7253
mm, α2 = 20 °.

Further, since the ball member 3 is fitted into the concave portions 12 and 22, the ball member 3 prevents the metal electrodes 1 and 2 from shifting from each other in the lateral direction. In addition, since the bolt 5 is fastened through the ball member 3, its prevention is ensured. Further, if the bolt 5 is provided at a place other than the ball member 3, the discharge area in the gap 4 is reduced by the amount of the bolt 5. However, in the present embodiment, the bolt 5 is provided at the place of the ball member 3. There is no reduction in the discharge area based on No. 5.

The three locations of the mechanical element 100 shown in FIG. 6 are such that the fastening force of the bolt 5 and the nut 51 is evenly applied to the entire surface of the metal electrodes 1 and 2. With such an arrangement, the locations where the mechanism elements 100 are provided are not limited to three locations.

[0018]

According to the first aspect of the invention, in the ozone generator, the gap between the opposing dielectric layers can be precisely set to an extremely narrow predetermined value. Therefore, the generation efficiency of ozone can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the principle of a gap setting mechanism of an ozone generator of the present invention.

FIG. 2 is an exploded perspective view of the mechanism of FIG.

FIG. 3 is a perspective view showing a step subsequent to FIG. 2;

FIG. 4 is a sectional view showing another example of the ball member.

FIG. 5 is a perspective view showing still another example of the ball member.

FIG. 6 is a perspective view of an ozone generator employing the gap setting mechanism of the first embodiment.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a perspective view showing a ball member according to the first embodiment.

FIG. 9 is a cross-sectional view showing one step of a method of forming the gap setting mechanism of the first embodiment.

FIG. 10 is a sectional view showing a step subsequent to FIG. 9;

FIG. 11 is a sectional view showing a step subsequent to that of FIG. 10;

FIG. 12 is a sectional view showing a step subsequent to FIG. 11;

[Explanation of symbols]

 1, 2 Metal electrode 10, 20 Dielectric layer 11, 21 Opposing surface 12, 22 Recess 3 Ball member 4 Gap

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Yamada 3-9-39 Mikunihonmachi, Yodogawa-ku, Osaka-shi, Osaka F-term in Japan Aluminum Co., Ltd. (reference) 3J001 AA02 DA00 DB04 EA00 4G042 CA01 CC04 CC05 CC16

Claims (1)

[Claims] 1. A dielectric layer having a pair of plate-like metal electrodes formed on one surface thereof is disposed so as to face each other with a gap therebetween, and a silent discharge is generated in the gap while flowing oxygen through the gap. A mechanism for setting the gap between the opposing dielectric layers to a predetermined value in the ozone generator, wherein a concave portion formed so as to oppose the opposing surfaces of the two metal electrodes, A ball member fitted over both opposing concave portions, wherein the dimensions of the concave portion and the ball member are such that when the ball member is fitted into the concave portion of both opposing surfaces, the gap between the opposing surfaces is a predetermined value. A gap setting mechanism for an ozone generator, wherein