JP2007084403A - Discharge cell for ozone generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the damage of two dielectric plates 11, 11 caused by warpage in an ozone generator having a planar dielectric unit 10 in which a first electrode 12 is inserted between the dielectric plates 11, 11. <P>SOLUTION: A space in which a gap amount is determined by spacers 30, 30 is formed between two second electrode plates 20, 20. The dielectric unit 10 is arranged at the space so as to form discharge voids 70, 70 between the second electrode plates 20, 20. For burying the first electrode plate 12, a recessed part 13 to be engaged with the first electrode 12 is provided at either or both of the respective confronted faces of the two dielectric plates 11, 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a discharge cell used in an ozone generator, and more particularly to a plate-type discharge cell using a plate-like dielectric.

  The discharge cells used in the ozone generator are roughly classified into a plate type and a tube type, and the plate type is further subdivided into a disc type and a square plate type. Plate-type discharge cells are frequently used to generate high-concentration ozone because the discharge gap formed in contact with the dielectric plate is easily narrowed and the discharge gap dimension (gap amount) is easily equalized. One such plate discharge cell is described in Patent Document 1. The schematic structure of the discharge cell described in Patent Document 1 will be described with reference to FIG.

JP 2000-281318 A

  In the discharge cell described in Patent Document 1, a flat plate-like dielectric unit 3 having a high voltage electrode 2 sandwiched between a pair of dielectric plates 1 and 1, and a pair of flat plate-like rigid bodies. The ground electrodes 4 and 4 are laminated. More specifically, by disposing the rigid spacers 5 and 5 between the pair of ground electrodes 4 and 4, a space in which the gap amount is determined is formed. The dielectric unit 3 is disposed at a neutral position in the space so that the discharge gaps 6 and 6 are formed between the pair of ground electrodes 4 and 4. A plurality of spacers 7, 7... Are arranged between the ground electrode 4 and the dielectric unit 3 in order to ensure the gap amount in the discharge gap 6.

  Here, the ground electrodes 4 and 4 also serve as a cooling body (water cooling jacket). The dielectric plates 1 and 1 are, for example, a glass plate having a thickness of 0.7 mm. For example, the dielectric plates 1 and 1 are bonded by adhesives 8 and 8 outside the high-voltage electrode 2 with the high-voltage electrode 2 made of stainless steel foil having a thickness of 0.3 mm, for example. Is done. The spacers 7, 7,... For securing the gap amount are, for example, stainless steel wires having an outer diameter of 0.3 mm. The rigid spacers 5 and 5 disposed between the ground electrodes 4 and 4 are stainless steel plates having a thickness of about 2 mm.

  During operation of the discharge cell, a predetermined high frequency high voltage is applied between the high voltage electrode 2 and the ground electrodes 4 and 4. In this state, the raw material gas is ozonized by introducing the raw material gas into the discharge gaps 6 and 6 from before and after. The ozone gas generated in the discharge gaps 6 and 6 is taken out from the front and rear intermediate portions of the discharge gaps 6 and 6 to both sides.

  In such a discharge cell, the ground electrodes 4 and 4 are clamped in the stacking direction at the rigid body spacers 5 and 5 to assemble the discharge cell. Because of the rigid spacers 5 and 5, a gap is defined between the ground electrodes 4 and 4, and the dielectric unit 3 and the spacers 7, 7. No power is added. However, the thickness of the rigid spacers 5, 5 is the same as the total dimensions of the dielectric plates 1, 1, the high voltage electrode 2, the spacers 7, 7,... So that the dielectric unit 3 does not touch the space. Is set. This prevents damage to the dielectric plates 1 and 1 due to tightening and ensures a uniform and stable minute gap amount of 0.5 mm or less with respect to the gap amount of the discharge gaps 6 and 6. Is possible.

  However, in the actually manufactured discharge cell, it has been experienced that the dielectric plates 1 and 1 to which no clamping force should be applied are damaged. Further, it has been clarified that the gap amount distribution of the discharge gaps 6 and 6 is not as uniform as expected despite the large number of spacers 7, 7. As a result of investigating the cause, warpage of the dielectric plates 1 and 1 due to the adhesion of the dielectric plates 1 and 1 outside the high-voltage electrode 2, more specifically, the dielectric plate 1 at the location where the spacers 7, 7,. , 1 was found to be caused by load concentration due to warpage.

  That is, in order to fix the high voltage electrode 2 between the dielectric plates 1 and 1 to improve the assemblability and further to electrically insulate the high voltage electrode 2, the dielectric plates 1 and 1 are disposed outside the high voltage electrode 2. Bonding is performed with adhesives 8 and 8 made of epoxy resin or the like. As a result, the dielectric plates 1 and 1 warp in the direction in which the central portion swells up and down. Here, the spacers 7, 7... Are tightly inserted into the discharge gap 6 in order to prevent the dielectric unit 3 from rattling. Further, the total dimensions of the dielectric plates 1, 1, the high-voltage electrode 2, the spacers 7, 7... Vary greatly because their tolerances overlap. Further, the spacers 7 made of wires are in line contact with the dielectric plate 1. For these reasons, the dielectric plate 1 is often subjected to a large concentrated load from the spacers 7, 7.

  Apart from this problem, the discharge cell requires a large number of spacers 7, 7,... For managing the gap amount, and there is a problem that the cost of the wires used for the spacers 7, 7,.

  The objective of this invention is providing the discharge cell for ozone generators which can prevent the curvature of the dielectric plate which pinches | interposes a high voltage electrode. Another object of the present invention is to provide a discharge cell for an ozone generator capable of reducing the cost of a spacer for managing the gap amount.

  The discharge cell for an ozone generator of the present invention has a plate-type dielectric unit having a first electrode sandwiched between two dielectric plates, and a pair of discharge gaps between the two second electrode plates. In the plate-type ozone generator discharge cell in which the dielectric unit is disposed between two second electrode plates to form a first electrode plate between the two dielectric plates, A recess in which the first electrode is fitted is provided on one or both of the opposing surfaces of the dielectric plate.

  In the discharge cell for the ozone generator of the present invention, the first electrode sandwiched between the two dielectric plates is embedded in the opposing surfaces of the two dielectric plates, so that the two dielectric plates are in close contact with each other outside the first electrode. To do. For this reason, even if the two dielectric plates are bonded outside the first electrode, the two dielectric plates are not warped. The adhesion of the dielectric plate is effective not only for mechanical fixation of the first electrode sandwiched therebetween, but also for electrical insulation of the first electrode.

  Another discharge cell for an ozone generator according to the present invention has a plate-type dielectric unit in which a first electrode is sandwiched between two dielectric plates, and a pair of two dielectric electrode plates is interposed between the two second electrode plates. In a plate-type ozone generator discharge cell in which the dielectric unit is disposed between two second electrode plates in order to form a discharge gap, the two dielectric plates are bonded to each other outside the first electrode with a solvent-free adhesive. Are bonded together.

  In another discharge cell for an ozone generator according to the present invention, two dielectric plates are bonded to each other with a solventless adhesive outside the first electrode. Specific examples of the solventless adhesive that does not use a solvent include SA-250 series manufactured by Asahi Chemical Research Laboratory. In the case of an epoxy resin adhesive that uses a solvent, the solvent evaporates and shrinks during the curing process, but in the case of a non-solvent adhesive that does not use a solvent, there is no shrinkage due to the evaporation of the solvent. Even if not, the warpage of the two dielectric plates can be suppressed as much as possible.

  When two dielectric plates are bonded to each other with a solventless adhesive, it is not necessary to perform bonding on the entire outside of the first electrode. Adhesion can be performed partially, and it is preferable to interpose a spacer for preventing warpage in the non-adhered portion. By doing so, the curvature of the dielectric plate due to the shrinkage of the adhesive can be more effectively suppressed. The spacer can be used only at the time of bonding and can be removed after bonding.

  In any discharge cell for an ozone generator, each discharge gap formed on each back side of the dielectric unit is provided with a spacer for managing the gap amount. The spacer may be a conventional wire or the like, but is preferably an integral type formed by removing portions other than the spacer on the back surfaces of the two dielectric plates. According to this integrated spacer, the spacer can be installed without using a separate member such as a wire, and the spacer cost is reduced. In addition, since the separate member is not necessary and the first electrode is embedded in the dielectric plate, the thickness of the member disposed between the two second electrode plates is the total thickness of the two dielectric plates, As a result, the tolerance factor is reduced and the variation is reduced. From this point, the dielectric plate can be prevented from cracking.

  The pair of second electrode plates form a space in which the gap amount is determined by a rigid body spacer disposed therebetween, and a pair of discharge gaps are formed between the two second electrode plates. A configuration in which the dielectric unit is accommodated in the space is preferable. As described above, this configuration avoids the addition of a tightening force to the dielectric unit. By avoiding this tightening force and preventing the warping of the dielectric plate described above, it is possible to stably secure a minute and evenly distributed gap amount.

  In the discharge cell for an ozone generator of the present invention, the first electrode sandwiched between the pair of dielectric plates is embedded, so that the pair of dielectric plates can be prevented from warping due to the interposition of the first electrode. Thereby, the load concentration in the spacer part arrange | positioned at the discharge space | gap between 2nd electrodes can be reduced, and the failure | damage of a dielectric plate can be prevented. In addition, by preventing warping of the pair of dielectric plates, a fine and uniform gap amount can be stably secured in the discharge gap in contact with the dielectric plates. By integrally forming the spacers on the back surfaces of the pair of dielectric plates, the member cost of the spacers can be reduced.

  In another discharge cell for an ozone generator according to the present invention, when a pair of dielectric plates sandwiching the first electrode is bonded outside the electrode, the first electrode is interposed by using a solventless adhesive as the adhesive. Thus, warping of the pair of dielectric plates can be prevented. Thereby, the load concentration in the spacer part arrange | positioned at the discharge space | gap between 2nd electrodes can be reduced, and the failure | damage of a dielectric plate can be prevented. Further, by preventing warping of the pair of dielectric plates, a fine and uniform gap amount can be stably secured in the discharge gap in contact with the dielectric plates. By integrally forming the spacers on the back surfaces of the pair of dielectric plates, the member cost of the spacers can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an ozone generator discharge cell according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view showing a configuration of a main part of the ozone generator discharge cell.

  As shown in FIGS. 1 and 2, the discharge cell for an ozone generator according to the present embodiment is a laminate in which a plurality of horizontal plate members are stacked in a plate thickness direction (vertical direction) and tightened. The dielectric unit 10 made of a substantially square plate material, the cooling bodies 20, 20 made of rectangular plates superimposed on the respective back surfaces of the dielectric unit 10, and the cooling unit 20, 20 together with the dielectric unit 10 The spacers 30, 30 arranged, a top plate 50 stacked on the back side of the upper cooling body 20 via the end plate 40, and a bottom plate 60 stacked on the back side of the lower cooling body 20. ing.

  In other words, the discharge cell for the ozone generator is a laminate in which the dielectric unit 10, the cooling bodies 20 and 20, and the end plate 40 are sandwiched between the top plate 50 and the bottom plate 60 and fixed in the thickness direction. The space for holding the dielectric unit 10 is secured between the cooling bodies 20 and 20 by sandwiching the spacers 30 and 30 between the cooling bodies 20 and 20 on both sides of the dielectric unit 10. The end plate 40, the top plate 50, and the bottom plate 60 are the same rectangular plates as the cooling bodies 20 and 20.

  The dielectric unit 10 includes a pair of dielectric plates 11 and 11 made of a substantially square glass plate, and a substantially square high-voltage electrode 12 sandwiched between the dielectric plates 11 and 11. The thickness of the dielectric plates 11, 11 is, for example, 1.0 mm. The high-voltage electrode 12 is a first electrode and is made of a stainless steel thin plate that is slightly smaller than the dielectric plates 11, 11, for example, having a thickness of 0.3 mm.

  On the opposing surfaces of the dielectric plates 11, 11, substantially square recesses 13, 13 into which the high voltage electrode 12 is fitted are provided. The recesses 13, 13 are shallow recesses of uniform thickness formed by blasting or the like in portions other than the outer edge portions of the opposing surfaces of the dielectric plates 11, 11, and the total depth thereof matches the thickness of the high-voltage electrode 12. Designed to be When the high voltage electrode 12 is embedded and accommodated in the recesses 13 and 13, the dielectric plates 11 and 11 are naturally adhered to each other at the outer edge portion outside the high voltage electrode 12, and the adhesion portions are bonded by an epoxy resin or the like. Has been.

  On the other hand, a plurality of ribs 15, 15... Extending from the front side to the back side are provided on the back surfaces of the dielectric plates 11, 11 at predetermined intervals in the lateral width direction. Similar convex portions are also provided on the peripheral outer edge. The ribs 15, 15,... Have a quadrangular cross section, here a trapezoid, and are formed by removing portions other than the convex portions by blasting or the like. These ribs 15, 15... Form discharge gaps 70, 70 having an equal gap amount between the dielectric plates 11, 11 and the rear cooling bodies 20, 20.

  In other words, ribs are formed on the back surface of each dielectric plate 11 in order to maintain and uniform the gap amount of the discharge gaps 70, 70 formed between the dielectric plates 11, 11 and the cooling bodies 20, 20 on the back side. 15, 15... Are integrally formed as spacers. For smooth gas flow in the discharge gap 70, the ribs 15, 15,... Are divided at the middle part in the longitudinal direction, and are deviated in the lateral width direction before and after that. The height of the ribs 15, 15... Is, for example, 0.3 mm.

  The square-shaped dielectric unit 10 projects to the front side and the back side from between the rectangular cooling bodies 20 and 20 that are long horizontally. A part of the high-voltage electrode 12 is drawn out as a terminal part 14 from between the dielectric plates 11 and 11 to the front side, and a groove part continuing to the concave parts 13 and 13 is also provided in a part through which the terminal part 14 passes. . The thickness of the dielectric unit 10 is the total thickness of the dielectric plates 11 and 11 and is substantially the same as the thickness of the spacers 30 and 30 described later.

  The spacers 30, 30 disposed between the cooling units 20, 20 together with the dielectric unit 10 are made of stainless steel plates having the same thickness as the dielectric unit 10, and are positioned on both sides of the dielectric 10 between the cooling bodies 20, 20. Is arranged. Each spacer 20 is provided with a pair of circular coolant holes 31, 31 before and after cooling water passes, and a rectangular gas hole 32 through which ozone gas flows is located between the coolant holes 31, 31. Is provided. Each spacer 20 is also provided with a plurality of bolt holes through which tightening bolts pass.

  The cooling bodies 20 and 20 are flat-plate jackets that join two long rectangular stainless steel plates and distribute cooling water through a water passage formed between the joining surfaces. The second electrode (ground electrode) Doubles as On both sides of each cooling body 20, circular refrigerant holes 21, 21 through which cooling water passes are provided corresponding to the refrigerant holes 31, 31 of the spacer 30, and rectangular gas holes 22 through which ozone gas flows are provided. , Provided corresponding to the gas holes 32 of the spacer 30.

  Each cooling body 20 is also provided with a plurality of bolt holes, and a slit-like gas passage 23 which is long in the side is provided between the gas holes 22 on both sides. The gas path 23 is located in the middle part of the cooling body 20 in the front-rear direction, and the gas holes 22 on both sides communicate with each other via a gas path formed between the joining surfaces of the stainless steel plates.

  The two refrigerant holes 21 and 21 on one side communicate with each other through a water passage formed between the joint surfaces, and the two refrigerant holes 21 and 21 on the opposite side communicate with each other through a water passage formed between the joint surfaces. is doing. These water passages are provided avoiding the gas holes 22 and 22 on both sides, and the gas passages and bolt holes therebetween.

  The end plate 40 is a cover plate that closes the gas passage 23 of the upper cooling body 20 from above, and is made of one stainless steel plate having the same size as the cooling bodies 20, 20. The refrigerant holes 41 and 41 are provided at positions corresponding to the gas holes 21, and the gas holes 42 are provided at positions corresponding to the gas holes 22. Moreover, it has a bolt hole in the same position as the cooling bodies 20 and 20.

  The bottom plate 60 is a cover plate that closes the refrigerant holes 21 and 21, the gas holes 22, and the gas passages 23 of the lower cooling body 20 from the lower side, and is made of one stainless steel plate having the same size as the cooling bodies 20 and 20. Become. The bottom plate 60 also serving as an end plate is a thick plate. On the surface of the four corners of the bottom plate 60, circular recesses 61 for accommodating the seal rings are provided corresponding to the gas holes 21 at the four corners of the cooling body 20. A plurality of bolt holes are provided at the same position as the cooling body 20.

  The top plate 50 is a lid plate that closes the refrigerant holes 41 and 41 and the gas holes 42 of the end plate 40 from above, and is composed of a single stainless steel plate like the bottom plate 60. A coolant introduction hole 51 is provided through one corner of the top plate 50, and a coolant discharge hole 52 is provided through the corner located at the diagonal position. Further, a gas discharge hole 53 is provided through the central portion, and a bolt hole is provided at the same position as the end plate 40.

  The refrigerant introduction hole 51 communicates with the refrigerant holes 41, 41 on one side of the end plate 40 through a groove formed on the back surface of the top plate 50, and the refrigerant discharge hole 52 is formed on the back surface of the top plate 50. The refrigerant holes 41 and 41 on the other side of the end plate 40 communicate with each other through the formed groove. The gas discharge holes 53 communicate with the gas holes 42 on both sides of the end plate 40 through a groove formed on the back surface of the top plate 50.

  The discharge cell for an ozone generator according to this embodiment is assembled as follows.

  The high voltage electrode 12 is sandwiched between the dielectric plates 11 and 11 constituting the dielectric unit 10, and the outer edges of the dielectric plates 11 and 11 are bonded to each other outside the high voltage electrode 12. The high-voltage electrode 12 between the dielectric plates 11 and 11 is fitted into recesses 13 and 13 formed on the opposing surfaces of the dielectric plates 11 and 11. As a result, the outer edges of the dielectric plates 11 and 11 are in close contact with each other, and the dielectric plates 11 and 11 are not warped even though the close contact portions are bonded. Thus, the dielectric unit 10 is completed.

  The bottom plate 60, the lower cooling body 20, the dielectric unit 10 and the spacers 30 and 30 on both sides thereof, the upper cooling body 20, the end plate 40, and the top plate 50 are stacked in order from the bottom, and a predetermined number of through bolts are used. Tighten in the thickness direction. Thereby, the discharge cell is completed.

  In the completed discharge cell, discharge gaps 70 and 70 are formed between the cooling units 20 and 20 on both sides of the dielectric unit 10. On both sides, the coolant holes of the cooling bodies 20, 20, the spacer 30 and the end plate 40 are combined to form two vertically oriented coolant channels, and the gas holes are combined to form one vertically oriented gas. A flow path is formed.

  The tightening pressure associated with the bolt tightening includes both sides of the bottom plate 60, both sides of the lower cooling body 20, both spacers 30 and 30, both sides of the upper cooling body 20, both sides of the end plate 40, and the top plate. 50 is added to both sides of the spacer 50 and is not substantially added to the dielectric unit 10 between the spacers 30 and 30.

  That is, a space with a fixed gap amount is formed between the upper and lower cooling bodies 20 and 20 by the spacers 30 and 30 on both sides, and the dielectric unit 10 is disposed here. Moreover, the dielectric unit 10 does not warp and has a small thickness tolerance. The thickness tolerance of the dielectric unit 10 is small because the thickness of the dielectric unit 10 is determined by the total thickness of the cooling bodies 20 and 20 and is affected by the tolerance of the thickness of the high voltage electrode 12 and the outer diameter of the wire spacer. This is because there is not. Therefore, the ribs 15, 15,... Of the dielectric plate 11 are in surface contact with the surface of the cooling body 20 facing each other, and the gap amounts of the discharge gaps 70, 70 on both sides are kept the same. Further, since the pressure applied to the ribs 15, 15... Is slight and uniform, the dielectric plates 11, 11 are prevented from cracking. Furthermore, a fine and uniform gap amount can be obtained stably.

  In the operation of the discharge cell, the cell is accommodated in a tank, and the raw material gas is supplied into the tank. The cooling bodies 20, 20 that are the second electrodes are grounded, and a predetermined high-frequency high voltage is applied to the high-voltage electrode 12 that is the first electrode. Further, cooling water is introduced from the refrigerant introduction hole 51 of the top plate 50.

  The raw material gas in the tank flows into the discharge gaps 70 and 70 formed on both sides of the dielectric unit 10 from the front side and the back side, and is ozonized in the process of moving the discharge gaps 70 and 70 toward the center. The ozone gas thus generated is guided to the gas passages 23 and 23 of the cooling bodies 20 and 20 so as to be turned to both sides, passes through the vertical gas flow passages on both sides, and passes through the gas discharge holes 53 of the top plate 50 to the outside. It is taken out.

  The cooling water introduced into the cell from the refrigerant introduction hole 51 of the top plate 50 flows into the upper and lower cooling bodies 20 and 20 through two vertically oriented refrigerant channels formed on one side of the cell, After passing through these, the refrigerant is discharged from the refrigerant discharge hole 52 of the top plate 50 through two vertically oriented refrigerant channels formed on the other side of the cell. As a result, the discharge gaps 70 are efficiently cooled from above and below.

  Thus, in the discharge cell for an ozone generator of the present embodiment, the high voltage electrode 12 of the dielectric unit 10 is fixed by bonding the dielectric plates 11 and 11. Further, the dielectric unit 10 itself is fixed between the cooling bodies 20 and 20 without rattling. Therefore, the gap amount between the discharge gaps 70 and 70 becomes uniform and uniform. In addition, although the fixing structure without such rattling is employed, the high voltage electrode 12 is embedded between the dielectric plates 11 and 11, so that the deformation of the dielectric plates 11 and 11 does not occur. Further, the ribs 15, 15... That are spacers are also in surface contact with equal pressure. For these reasons, there is no danger of a concentrated load being applied to the dielectric plates 11 and 11 of the dielectric unit 10, and the dielectric plates 11 and 11 are not cracked. Furthermore, the gap amount due to deformation of the dielectric plates 11 and 11 does not occur.

  Since the ribs 15, 15,... Are integrally formed on the respective surfaces of the dielectric plates 11, 11 as spacers for managing the gap amount in the discharge gaps 70, 70, the spacer cost compared to the case where stainless steel wires are used as the spacers. Go down. As described above, the wire contact with the dielectric plates 11 and 11 is eliminated, and cracking of the dielectric plates 11 and 11 is avoided from this viewpoint.

  Although the high voltage electrode 12 of the dielectric unit 10 is equally embedded in both the dielectric plates 11 and 11 in the present embodiment, it can be unevenly embedded in both the dielectric plates 11 and 11. It is also possible to embed it in one side.

  FIG. 3 is a schematic cross-sectional view showing the configuration of the main part of a discharge cell for an ozone generator according to another embodiment of the present invention.

  The discharge cell for ozone generator of the present embodiment is different in the structure of the dielectric unit 10 from the discharge cell for ozone generator described above. The dielectric unit 10 here has a structure in which a high voltage electrode 12 is sandwiched between two dielectric plates 11, 11, and the high voltage electrode 12 is not embedded between the dielectric plates 11, 11.

  That is, the opposing surfaces of the dielectric plates 11 and 11 are flat, and a small high voltage electrode 12 is sandwiched between them, and the dielectric plates 11 and 11 are bonded by a solventless adhesive 80 at the outer edge portion outside the high voltage electrode 12. Yes. That is, in order to interpose a spacer for preventing warpage, the dielectric plates 11 and 11 are partially bonded at the outer edge portion. More specifically, a spacer for preventing warpage is interposed in the non-adhesive portion at the time of bonding. Then, after the dielectric plates 11 and 11 are bonded to each other by the solventless adhesive 80 at the outer edge portions, the dielectric plates 11 and 11 are partially bonded at the outer edge portions by pulling out the spacer from between the dielectric plates 11 and 11. ing.

  Since the solventless adhesive 80 is a resin adhesive that does not contain a solvent, the solvent does not volatilize during solidification and shrinkage does not occur. In addition, a spacer having the same thickness as that of the high-voltage electrode 12 is interposed between the dielectric plates 11 and 11 outside the high-voltage electrode 12 while avoiding the bonding portion when bonding with the solventless adhesive 80. For these reasons, even though the high-voltage electrode 12 is not embedded in the dielectric plates 11 and 11, warpage due to adhesion of the dielectric plates 11 and 11 is prevented.

  The structure of parts other than the dielectric unit 10 is the same as that of the discharge cell for an ozone generator described above, and the same parts are given the same numbers, and the description thereof is omitted.

It is a disassembled perspective view of the discharge cell for ozone generator which shows one Embodiment of this invention. It is a schematic cross section which shows the structure of the principal part of the discharge cell for ozone generators. It is a schematic cross section which shows the structure of the principal part of the discharge cell for ozone generators which shows another embodiment of this invention. It is a schematic cross section which shows the structure of the principal part of the discharge cell for conventional ozone generators.

Explanation of symbols

10 Dielectric unit 11 Dielectric plate 12 High voltage electrode (first electrode)
13 Concave portion 14 Terminal portion 15 Rib 20 Cooling body (ground electrode, second electrode)
30 Spacer 40 End plate 50 Top plate 60 Bottom plate 70 Discharge gap 80 Solvent-free adhesive

Claims (7)

  There is a plate-type dielectric unit having a first electrode sandwiched between two dielectric plates, and the dielectric unit is divided into two in order to form a pair of discharge gaps between the two second electrode plates. In a plate-type discharge cell for an ozone generator disposed between two second electrode plates, one or both of the opposing surfaces of the two dielectric plates so that the first electrode plate between the two dielectric plates is embedded. A discharge cell for an ozone generator, characterized in that a recess into which the first electrode is fitted is provided.   Each discharge gap has a spacer for managing a gap, and the spacer is an integrally formed type formed by removing a portion of each of the back surfaces of the two dielectric plates excluding a portion where the spacer is disposed. Item 2. A discharge cell for an ozone generator according to Item 1.   The pair of second electrode plates forms a space in which the gap amount is determined by a rigid spacer disposed therebetween, and a pair of discharge gaps is formed between the two second electrode plates. The discharge cell for an ozone generator according to claim 1, wherein the dielectric unit is accommodated in the space.   There is a plate-type dielectric unit having a first electrode sandwiched between two dielectric plates, and the dielectric unit is divided into two in order to form a pair of discharge gaps between the two second electrode plates. Discharge for an ozone generator characterized in that in a plate-type discharge cell for an ozone generator arranged between two second electrode plates, two dielectric plates are bonded to each other with a solventless adhesive outside the first electrode. cell.   The ozone generation according to claim 4, wherein the two dielectric plates are partially bonded to each other at a portion outside the first electrode in order to interpose a warp preventing space between the two dielectric plates. Device discharge cell.   Each discharge gap has a spacer for managing a gap, and the spacer is an integrally formed type formed by removing a portion of each of the back surfaces of the two dielectric plates excluding a portion where the spacer is disposed. Item 5. A discharge cell for an ozone generator according to Item 4.   The pair of second electrode plates forms a space in which the gap amount is determined by a rigid spacer disposed therebetween, and a pair of discharge gaps is formed between the two second electrode plates. The discharge cell for an ozone generator according to claim 4, wherein the dielectric unit is accommodated in the space.

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