JP2006040860A - Ionization device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corona discharge type ionization device capable of evading as much as possible adhesion of a foreign matter to the discharge electrode while suppressing reduction of ion generation quantity by a nozzle. <P>SOLUTION: The gas passage unit 11 which receives supply of a clean gas discharges the gas from a clean gas discharge port 48a coaxial with the tip of the discharge electrode 12 through the inner clean gas passages 50, 48 of an electrode assembly 40. The electrode assembly 40 has a guard ring 46 for surrounding the surroundings of the discharge electrode 12, and this guard ring 46 has an external air inlet opening 46b for allowing free passage of the atmospheric air. The clean air discharged along the discharge electrode 12 is mixed with the atmospheric air introduced from the external air inlet opening 46b and becomes ionized air. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to static electricity control in the air or static elimination of a workpiece, and more particularly to a so-called ionizer.

  Corona discharge ionizers are frequently used for static electricity control in the air, such as cleaning in a clean room and static elimination for preventing static charge of suspended particles, and for static elimination of workpieces.

  FIG. 14 shows discharge electrode bars included in currently available DC ionizers. The discharge electrode bar 1 has an elongated cylindrical case 2, and a cylindrical nozzle 3 surrounding the discharge electrode is attached to the case 2, and the nozzles 3 are spaced apart from each other along the longitudinal direction. Are arranged.

  In the conventional discharge electrode bar 1, the high voltage power supply unit 4 or the control unit 5 is disposed between the adjacent nozzles 3 and 3, and the clean gas discharged from each nozzle 3 is disposed in the case 2. The flexible tube 6 is supplied. The positive-side nozzle of the DC discharge electrode bar 1 shown in the figure is indicated by 3a, and the negative-side nozzle is indicated by 3b.

  When the nozzle is provided around the discharge electrode, the nozzle is charged with the same polarity as the discharge electrode, which causes a problem that the electric field around the discharge electrode is relaxed and the amount of generated ions is reduced.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a corona discharge ionization apparatus that can suppress a decrease in the amount of ions generated by a nozzle, and a discharge electrode assembly that is assembled thereto.

  A further object of the present invention is to provide an ionization apparatus capable of preventing contamination of the discharge electrode and a discharge electrode assembly assembled to the ionization apparatus.

  A further object of the present invention is to provide an ionization apparatus capable of achieving both prevention of contamination of the discharge electrode and ensuring of a sufficient amount of ion generation, and a discharge electrode assembly assembled thereto.

Such a technical problem, according to the first aspect of the present invention,
In an ionization apparatus that generates ionized air by applying a high voltage to the discharge electrode and causing corona discharge,
It has a clean gas outlet coaxial with the tip of the discharge electrode,
This is achieved by providing an ionization device characterized by generating ionized air while entraining atmospheric air with clean gas ejected from the clean gas ejection port by ejecting clean gas through the clean gas ejection port. The

  That is, according to the first aspect of the present invention, the clean gas ejected from the clean gas discharge port entrains atmospheric air in the vicinity of the discharge electrode and flows down as ionized air together with the atmospheric air.

  Since the conventional nozzle is not substantially present around the discharge electrode, the nozzle is charged to the same polarity, which has been a problem in an ionization apparatus equipped with the conventional nozzle. There is no relaxation of the electric field around the discharge electrode, thereby preventing a decrease in the amount of ions generated. Moreover, since the clean gas discharged from the clean gas discharge port flows along the tip of the discharge electrode, contamination of the tip of the discharge electrode can be prevented by this clean gas.

  In a preferred embodiment of the present invention, the tip of the discharge electrode is located on the center line of the clean gas discharge port, and the tip of the discharge electrode protrudes forward from the clean gas discharge port. Thereby, the clean gas discharged from the clean gas discharge port flows out while surrounding the tip of the discharge electrode, thereby forming a barrier and preventing outside air from touching the discharge electrode. The outside air, that is, the ambient air, is discharged to the front as ionized air while being mixed with the outside air at the front position slightly spaced from the tip of the discharge electrode, with the outer periphery of the clean gas flowing out from the clean gas discharge port drawing the outside air. The In addition to this, since the tip of the discharge electrode protrudes forward from the clean gas discharge port, the amount of ionized air generated is larger than when the tip of the discharge electrode is placed in the clean gas discharge port. Thus, sufficient ionized air can be secured while preventing the discharge electrode from being contaminated. The amount of protrusion at the tip of the discharge electrode protruding from the clean gas discharge port may be determined on the basis of a balance between the prevention of contamination of the discharge electrode and the required amount of ionized air generated.

According to the second aspect of the present invention, the above technical problem is:
In an ionization apparatus that generates ionized air by applying a high voltage to the discharge electrode and causing corona discharge,
An electrode support member provided with a gas discharge port for discharging the clean gas so as to surround the discharge electrode and surround the tip portion of the discharge electrode with the clean gas;
A finger disposed at a position spaced forward of the tip of the discharge electrode and having an opening that prevents finger contact with the tip of the discharge electrode from the front and allows ionized gas to flow out forward around the discharge electrode Guard,
A plurality of legs connected to the finger guard and the electrode support;
The clean gas flowing while surrounding the tip of the discharge electrode draws in the ionized air while entraining the ambient air flowing into the space surrounded by the plurality of legs through the external air introduction opening between the plurality of legs. This is accomplished by providing an ionizer characterized by producing.

  According to the second aspect of the invention, unlike the conventional sleeve that forms a continuous wall, there are only a plurality of legs having openings for introducing external air around the tip of the discharge electrode. Therefore, it is possible to reduce the amount of charge that the leg charges to the same polarity as the discharge electrode. Therefore, as compared with a conventional ionization apparatus having a sleeve around the discharge electrode, it is possible to suppress the relaxation of the electric field around the discharge electrode, thereby suppressing a decrease in the amount of generated ions. Further, since the periphery of the tip of the discharge electrode is surrounded by the clean gas, contamination of the tip of the discharge electrode can be prevented by this clean gas. Further, according to the invention from the second aspect, the finger guard can prevent the operator from touching the tip of the discharge electrode by mistake.

  In the ionization apparatus according to the second aspect, preferably, the front end portion of the discharge electrode is disposed at the center of the gas discharge port, and clean gas is discharged from the gas discharge port while being in contact with the front end portion of the discharge electrode. More preferably, the tip of the discharge electrode is disposed so as to slightly protrude forward from the gas discharge port.

According to a third aspect of the present invention, in order to achieve the above technical problem,
A discharge electrode assembly that is detachably assembled to an ionizer that generates ionized air by applying a high voltage to the discharge electrode to cause corona discharge,
A discharge electrode;
An electrode support member provided with a gas discharge port for discharging the clean gas so as to surround the tip portion of the discharge electrode with clean gas while supporting the discharge electrode;
A finger disposed at a position spaced forward of the tip of the discharge electrode and having an opening that prevents finger contact with the tip of the discharge electrode from the front and allows ionized gas to flow out forward around the discharge electrode Guard,
A plurality of legs connected to the finger guard and the electrode support;
The clean gas flowing while surrounding the tip of the discharge electrode draws in the ionized air while entraining the ambient air flowing into the space surrounded by the plurality of legs through the external air introduction opening between the plurality of legs. An electrode assembly is provided that is characterized by being produced.

  According to the discharge electrode assembly according to the third aspect, it is a matter of course that the effect of the ionization apparatus according to the second aspect described above can be obtained by assembling the discharge electrode assembly to the ionization apparatus. Then, when the performance of the ionizer deteriorates, the ionizer can be returned to the initial performance by replacing the discharge electrode assembly. In addition, it is possible to prevent the operator from being injured by accidentally touching the tip of the discharge electrode with the finger during the replacement work.

  In the ionization apparatus according to the third aspect, preferably, the front end portion of the discharge electrode is disposed at the center of the gas discharge port, and clean gas is discharged from the gas discharge port while being in contact with the front end portion of the discharge electrode. More preferably, the tip of the discharge electrode is disposed so as to slightly protrude forward from the gas discharge port.

In a preferred embodiment of the present invention, in an ionization apparatus that generates ionized air by applying a high voltage to a discharge electrode to cause corona discharge,
An electrode support member provided with a gas passage for supporting the discharge electrode and discharging clean gas from the tip end portion of the discharge electrode to the outside along the longitudinal direction of the discharge electrode;
A ring body having an opening through which a flow of clean gas discharged from the electrode support member passes at a position spaced apart from the electrode support member by a predetermined distance in the longitudinal direction of the discharge electrode; and the ring body and the electrode support body And a guard ring with a plurality of legs connected to each other,
The ring body has a shape that is continuous in the circumferential direction, and has a diameter that can prevent the penetration of a fingertip;
The clean gas discharged from the tip portion of the discharge electrode generates ionized air while entraining atmospheric air flowing into the guard ring through the external air introduction opening between the adjacent legs. To do.

  In a preferred embodiment of the present invention, the front end portion of the discharge electrode is disposed at the center of the gas discharge port, and clean gas is discharged from the gas discharge port while being in contact with the front end portion of the discharge electrode. More preferably, the tip of the discharge electrode is disposed so as to slightly protrude forward from the gas discharge port.

  The guard ring not only has a finger guard function to prevent the finger from touching the tip of the discharge electrode when the discharge electrode is replaced, for example, but also the ring body having a continuous shape in the circumferential direction, that is, the finger guard. Gives rigidity to the guard ring, and when the discharge electrode is replaced, the guard ring can be prevented from being deformed when the guard ring is gripped with a fingertip.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a view for explaining the internal layout of the discharge electrode bar of the ionization apparatus of the embodiment, and FIG. 2 is a perspective view showing the outer shape of the discharge electrode bar 100 of the embodiment.

  The discharge electrode bar 100 has a case 10 having an inverted U-shaped cross section with its upper end closed. Inside the case 10, there are a gas passage unit 11 and a discharge electrode 12 with pointed tips spaced apart from each other in the lower region. Several are arranged.

  On the other hand, a high voltage unit 13 accommodated in a sealed box and a control unit 14 including a power supply circuit, for example, a display circuit and a CPU are arranged in the upper region of the case 10. Clean gas ports 15 are provided on both end surfaces of the case 10 in the longitudinal direction, and inert gas such as nitrogen gas or dust in the atmosphere is filtered or moisture is removed from a gas source outside the figure through the clean gas ports 15. A clean gas composed of filtered air from which gas has been removed, more preferably, a clean gas from which organic compounds have been further removed, is supplied to the gas passage unit 11, and the clean gas in the gas passage unit 11 is supplied to each discharge as will be described in detail later. It is discharged along the electrode 12 to the outside. The clean gas that has passed through the tip of the discharge electrode 12 by discharging the clean gas becomes ionized air while entraining the atmospheric air, and flows down toward the workpiece. As a result, for example, when a gas containing an organic compound such as siloxane touches the discharge electrode 12, the organic compound is decomposed by corona discharge, and the solid substance adheres to the discharge electrode and falls for some reason. Although this causes a problem, such a problem can be solved by passing a clean gas containing no organic compound through the tip of the discharge electrode 12.

  The upper region and the lower region of the case 10 are preferably partitioned by an intermediate partition wall 16 (FIG. 1) extending in the longitudinal direction in order to substantially prevent gas from flowing between these regions. Reference numeral 17 denotes a connection terminal for receiving a modular connector for connecting adjacent discharge electrode bars 100 to each other. Reference numeral 18 denotes a grounded counter electrode plate. The counter electrode plate 18 substantially constitutes a part of the case 10, and the lower end opening of the case 10 is closed by the counter electrode plate 18. ing.

  3 and 4 show an elongated gas passage unit 11 arranged along the longitudinal direction of the case 10, and FIG. 3 is a perspective view showing a state in which the two gas passage units 11 are connected. FIG. 4 is an exploded perspective view of each gas passage unit 11.

  As can be understood from FIG. 3, a joint 21 for the flexible connection tube 20 is provided on the end wall in the longitudinal direction of the gas passage unit 11, and the connection tube 20 is fitted to the joint 21. Adjacent gas passage units 11 communicate with each other and communicate with a clean gas port 15 (FIGS. 1 and 2).

  As can be understood from FIG. 4, each gas passage unit 11 has an elongated support plate 25 extending in the horizontal direction and a box-shaped member 26 opened upward. A groove 27 having a rectangular outline is formed on the lower surface of the support plate 25, and a clean gas passage 28 (FIG. 6) sealed by fitting the upper edge of the box-shaped member 26 into the groove 27 is configured. The clean gas passage 28 communicates with the above-described joint 21 provided on each end wall in the longitudinal direction of the box-shaped member 26.

  The support plate 25 is provided with an elongated high voltage distribution board 30 extending in the longitudinal direction on the upper surface thereof. The high voltage distribution board 30 is sandwiched between the support plate 25 and a fixed plate 31 thereon. The high voltage distribution board 30 is provided with a springy conductive connection port 32 at a position corresponding to each discharge electrode 12. Instead of the conductive connection port 32, a spring-like contact piece formed by cutting and raising a part of the high-voltage board 30 may be used. The support plate 25 is also formed with a first sleeve 35 extending vertically at a position corresponding to each conductive connection port 32.

  The box-shaped member 26 described above has a second sleeve 37 disposed at a position corresponding to the first sleeve 35 of the support plate 25, and the second sleeve 37 is preferably formed on the base end portion thereof. Preferably, a circumferential flange 38 is provided for increasing the distance.

  4 and 6, the member indicated by reference numeral 40 is an electrode assembly. The electrode assembly 40 is fitted to a main body 41 (FIG. 5) for supporting the discharge electrode 12, an attachment 43 fitted to the shaft portion 42 of the main body 41, and a tip portion of the main body shaft portion 42. The seal member 44 is made of an elastic material such as rubber.

  The electrode main body 41 has an enlarged head portion 45 positioned at the distal end portion of the discharge electrode 12, and the enlarged head portion 45 surrounds the periphery of the distal end of the discharge electrode 12 and emits air from the periphery of the discharge electrode 12. It is preferable to provide a guard ring 46 having an opening in the center for ensuring the progress of air. The guard ring 46 is positioned at a predetermined interval from the discharge electrode 12 and spaced in the circumferential direction so as to position and hold the enlarged head portion 45 and introduce external air into the guard ring 46 from the outside. A plurality of leg portions 46a are provided separately from each other. The leg portion 46a is connected to the enlarged head portion 45, and an external air introduction opening 46b is formed between the adjacent leg portions 46a and 46a.

  The guard ring 46 has a circular ring-shaped finger guard, that is, a ring main body 46c at the tip thereof, and has a cylindrical outer contour as a whole, but the progress of air that discharges air from the periphery of the discharge electrode 12. If it is a dimension which can secure a finger insertion prevention function and can realize a finger insertion prevention function, it may have a polygonal cross section. The radial size of the guard ring 46 may be substantially the same as or less than the radial size of the base of the enlarged head portion 45.

  Further, the external air introduction opening 46b formed between the leg portions 46a described above may be configured as a space where nothing exists as shown in the figure, but allows free passage of atmospheric air from the outside. For example, it may have a net-like structure with a relatively large mesh, or may have a fence-like structure. In the design of the guard ring 46, it is desirable to suppress the area occupied by each leg 46a and to set the area of the external air introduction opening 46b large.

  Further, the front end surface of the enlarged head portion 45 has a mountain shape gradually rising from the outer peripheral portion thereof, that is, a horizontal surface 45a in which the region around the front end of the discharge electrode 12 is flat, and an inclined surface 45b inclined from the outer peripheral edge. It is good to consist of. In addition, from the viewpoint of not using atmospheric air in positive contact with the discharge electrode 12 and utilizing atmospheric air in the flow of ionized air, external atmospheric air supplied through the external air introduction opening 46b is discharged to the discharge electrode. The intersection of the inclined surface 45b and the virtual axis extending from the axis of the discharge electrode 12 is located at a position that is a predetermined distance from the tip of 12 and substantially the same as or lower than the height of the guard ring 46. It is preferable to set so as to.

  The electrode body 41 has a clean gas passage 48 formed along the periphery of the tip portion of the discharge electrode 12, and the clean gas passage 48 is opened to the outside through a small-diameter discharge port 48 a coaxial with the tip of the discharge electrode 12. Has been. That is, the discharge electrode 12 is disposed coaxially with the central axis of the clean gas passage 48, and the tip of the discharge electrode 12 slightly protrudes forward from the small-diameter protruding port 48a. The shaft portion 42 of the electrode body 41 has an inlet 48 b extending in the radial direction in the shaft portion 42, and the clean gas passage 48 in the electrode body 41 can communicate with the outside through the inlet 48 b of the shaft portion 42. .

  The attachment 43 surrounding the electrode main body 41 (shaft portion 42) forms a clean gas passage 50 in the gap between the main body shaft portion 42, and the clean gas passage 50 around the shaft portion has a tip of the attachment 43. Clean gas is introduced from the clean gas passage 28 in the gas passage unit 11 through the air inlet 50a formed in the portion.

  When the electrode assembly 40 is inserted into the second sleeve 37 of the gas passage unit 11, the base end of the discharge electrode 12 is fitted into the connection port 32 of the high voltage distribution board 30, and the high voltage distribution board 30 and the discharge electrode are inserted. 12 is electrically connected, and a part of the seal member 44 provided at the tip of the main body shaft portion 42 is fitted into the first sleeve 35, so that the connection area between the discharge electrode 12 and the high voltage distribution board 30. Is sealed. That is, the connecting portion between the discharge electrode 12 and the high voltage panel 30 is completely isolated from the clean gas passage 28 in the unit 11 by the seal member 44, so that the clean gas passing through the gas passage unit 11 is affected. There is no effect. Reference numeral 52 in FIG. 6 is an O-ring.

  FIG. 7 shows an outline of an electric circuit of the discharge electrode bar 100. The discharge electrode bar 100 employs a pulsed AC ion generation method in which positive ions and negative ions are alternately generated from the same discharge electrode 12. The discharge electrode bar 100 includes a plus-side high voltage generation circuit 80 and a minus-side high voltage generation circuit 81, and the high voltage unit 13 is configured by these high voltage generation circuits 80 and 81. 13 is accommodated in a sealed box (not shown).

  The plus side high voltage generating circuit 80 and the minus side high voltage generating circuit 81 are both self-excited case transmitting circuits 84 and 85 connected to the primary side coils of the transformers 82 and 83, and connected to the secondary side coil, for example. And booster circuits 86 and 87 each including a double rectifier circuit. A protective resistor, that is, a first resistor R 1 is provided between the high voltage generation circuits 80 and 81 and the discharge electrode 12.

  A second resistor R2 and a third resistor R3 are connected in series between the ground terminal GND of the secondary coils of the transformers 82 and 83 and the frame ground FG. Further, the counter electrode plate 18 and the frame ground FG Between, 4th resistance R4 and 3rd resistance R3 mentioned above are connected in series.

  By detecting the current flowing through the fourth resistor R4 by the ion current detection circuit 88, the ion balance in the vicinity of the discharge electrode 12 can be known. By detecting the current flowing through the third resistor R3 by the ion current detection circuit 88, the ion balance in the vicinity of the workpiece or the charged object can be known. By detecting the current flowing through the second resistor R2 by the abnormal discharge current detection circuit 89, the abnormal discharge between the discharge electrode 12 and the counter electrode plate 18 or the frame ground FG can be detected. When the determination is made, the operator can be informed of the abnormality by turning on the display LED 90 which is an alarm means.

  The circuit of the pulsed AC discharge electrode bar 100 has been described above. As the discharge electrode bar, an AC method in which positive ions and negative ions are alternately generated at a commercial frequency, or an SSDC in which positive ions and negative ions are generated simultaneously. A pulse DC type in which positive ions and negative ions are generated alternately may be used.

  In the operation of the discharge electrode bar 100, the clean gas in the gas passage unit 11 enters the clean gas passages 50 and 48 constituting the internal passage of the electrode assembly 40 from the air introduction port 50 a of the attachment 43. It passes through the clean gas passages 50 and 48 and is discharged from a small-diameter discharge port 48 a around the tip of the discharge electrode 12. Reference numeral 51 shown in FIG. 6 is a seal member, and the seal member 51 seals between the attachment 43 and the enlarged head portion 45 of the electrode main body 41.

  According to the above-described embodiment, the discharge electrode 12 can be replaced only by inserting and removing the electrode assembly 40 or the main body 41, and this replacement operation can be easily performed. Further, since the periphery of the tip of the discharge electrode 12 is not surrounded by the sleeve-like nozzle as in the prior art and is in a state of being substantially exposed to the outside, the conventional sleeve-like nozzle has the same polarity as the voltage of the discharge electrode 12. It is possible to prevent the electrolysis around the electrode tip associated with the charging of the electrode from being relaxed. As a result, the amount of ions generated can be increased.

  The clean gas supplied from the gas source through the clean gas port 15 is discharged from a small-diameter discharge port 48a coaxial with the tip of the discharge electrode 12, and the tip of the discharge electrode 12 is cleaned by the clean gas discharged from the small-diameter discharge port 48a. Therefore, it is possible to prevent foreign matter from adhering to the tip of the discharge electrode 12, that is, contamination of the discharge electrode 12.

  The clean gas discharged from the small-diameter discharge port 48 a is ionized immediately after passing through the discharge electrode 12, but the atmospheric air supplied through the guard ring 46, that is, surrounding air, is relatively involved. A large amount of ionized air will flow down. The effect that the clean gas entrains the atmospheric air effectively appears when the flow rate of the clean gas discharged from the discharge port 48a is 40 m / sec or more.

  As described above, the discharge electrode 12 is disposed coaxially with the central axis of the clean gas passage 48, and the tip of the discharge electrode 12 is disposed on the central axis of the small-diameter gas discharge port 48a. It protrudes forward from 48a. The amount of ionized air generated can be increased by protruding the tip of the discharge electrode 12 forward from the gas discharge port 48a. However, if the discharge electrode 12 is protruded greatly from the gas discharge port 48a, the tip of the discharge electrode 12 is contaminated. The problem is reproduced. Therefore, the protruding amount of the discharge electrode 12 may be determined so that the necessary amount of ionized air generated and the problem of contamination of the discharge electrode 12 can be balanced.

  Further, when a guard ring 46 that allows free passage of atmospheric air is provided around the tip of the discharge electrode 12, the tip of the discharge electrode 12 may be touched during the work of inserting and removing the electrode assembly 40. Therefore, safety can be improved. In order to ensure this effect, it is preferable that the guard ring 46b has a height of 0.5 mm to 14 mm and a diameter of 2.5 mm to 10 mm.

  As shown in FIG. 8, the effect of preventing foreign matter from adhering to the tip of the discharge electrode 12 is effective by forming a truncated shape by cutting off the sharp tip of the discharge electrode 12 as shown in FIG. become. According to this, the electric field concentration portion is not a pointed end, but is around the tip surface 12a of the discharge electrode 12 (a circled portion in FIG. 8), and this portion is ejected from the small-diameter discharge port 48a. Since this is an area where the clean gas is easy to hit, the effect of preventing foreign matter adhesion by the clean gas can be ensured.

  9 to 13 show a modification 110 of the electrode assembly 40. The electrode assembly 110 according to this modification is directly attached to the second sleeve 37 without the attachment 43 described above. Therefore, the electrode assembly 110 has a mounting portion 111 that is continuous with the enlarged head portion 45, and the mounting portion 111 is formed with a recess 112 (FIGS. 10 and 13) that receives the second sleeve 37. Reference numeral 113 in FIG. 13 indicates a groove for receiving the O-ring 52 described above.

  The recess 112 of the mounting portion 111 has an L-shaped keyway 114 formed on the wall surface that defines the recess 112. As can be understood from FIG. 10, the keyway 114 opens at the end of the mounting portion 111. The keyway 114 receives a convex portion (not shown) provided on the second sleeve 37. That is, when the electrode assembly 110 is attached to the second sleeve 37, the electrode assembly 110 is inserted into the electrode sleeve 110 into the second sleeve 37 with the convex portion of the second sleeve 37 and the keyway 114 aligned. By rotating the electrode assembly 110, the electrode assembly 110 is fixed to the second sleeve 37 so as not to move in the axial direction.

  In the electrode assembly 110 of this modification, clean gas is supplied from the internal clean gas passage 28 (FIG. 6) of the discharge electrode bar 100 to the gas inlet 48b of the shaft portion 42 and enters the gas inlet 48b. The clean gas passes through the gas passage 48 around the discharge electrode 12 and is discharged to the outside through the small-diameter discharge port 48a around the tip of the discharge electrode 12.

  The preferred specific dimensions of the main parts of the electrode assembly 40 shown in FIGS. 5 and 6 and the electrode assembly 11 shown in FIGS. 11 to 13 are such that the distance from the horizontal surface 45a to the tip surface of the ring body 46c is about The inner diameter of the ring body 46c is about 9 mm, and the amount of protrusion of the tip of the discharge electrode 12 from the horizontal surface 45a is about 0.5 mm. The total area of the four external air introduction openings 46b between the adjacent leg parts 46a and 46a of the guard ring 46 is relative to the total area of the virtual ring-shaped wall occupied by the leg parts 46a and the external air introduction openings 46b. In other words, the total area of the four legs 46a is about 33% with respect to the total area of the virtual ring-shaped wall.

It is a figure for demonstrating the structure of the discharge electrode bar of an Example. It is a perspective view which shows the external form of the discharge electrode bar of an Example. It is a perspective view of two mutually connected gas passage units arranged in a lower region inside the discharge electrode bar. It is a perspective view which decomposes | disassembles and shows the gas channel unit containing an electrode assembly. It is a side view of the main body of an electrode assembly. It is sectional drawing which extracted the downward area | region and electrode assembly of the discharge electrode bar. It is a circuit diagram of a discharge electrode bar. It is a partial side view which shows the modification of the front-end | tip part of the discharge electrode contained in an electrode assembly. It is the figure which looked at the electrode assembly of the modification from the diagonal front. FIG. 10 is a view of the electrode assembly of FIG. 9 as viewed from an oblique rear surface. FIG. 10 is a side view of the electrode assembly of FIG. 9. FIG. 10 is a front view of the electrode assembly of FIG. 9. FIG. 10 is a cross-sectional view of the electrode assembly of FIG. 9. It is a figure for demonstrating the structure of the discharge electrode bar of the conventional ionization apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Discharge electrode bar 10 Case 11 Gas passage unit 12 Discharge electrode 18 Counter electrode plate 30 High voltage distribution board 32 Conductive connection port 38 Circumferential flange for creeping distance expansion 40 Electrode assembly 41 Electrode body 45a Electrode body horizontal surface 45b Electrode Inclined surface of main body 46 Guard ring 46a Leg portion of guard ring 46b External air introduction opening 46c Ring body of guard ring 48b Clean gas discharge port

Claims (16)

In an ionization apparatus that generates ionized air by applying a high voltage to the discharge electrode and causing corona discharge,
It has a clean gas outlet coaxial with the tip of the discharge electrode,
An ionizer that generates ionized air while entraining atmospheric air with clean gas ejected from the clean gas ejection port by ejecting clean gas through the clean gas ejection port.   The ionization apparatus according to claim 1, wherein the ionization apparatus has a truncated shape obtained by cutting off a pointed end of the discharge electrode. Having a guard ring provided around the tip of the discharge electrode;
The ionization apparatus according to claim 1, wherein the guard ring has a structure that allows free passage of atmospheric air.   The ionization device according to claim 3, wherein the guard ring has a ring main body that extends over the entire periphery of the guard ring and prevents a fingertip from entering. An electrode assembly is constituted by the discharge electrode and an electrode body that holds the discharge electrode,
The ionization apparatus according to claim 3 or 4, wherein the supply of the clean gas to the clean gas discharge port is performed through an internal passage of the electrode assembly.   The ionization device according to claim 5, wherein the electrode main body has a horizontal plane around the tip of the discharge electrode and an inclined plane inclined from an outer peripheral edge of the horizontal plane.   The inclined line is formed so that the extended line of the inclined surface and the axis of the discharge electrode meet at a predetermined distance from the tip of the discharge electrode and at a height substantially equal to or less than the height of the card ring. The ionization apparatus according to claim 6, wherein an inclination angle of the surface is set. The ionization apparatus comprises a discharge electrode bar in which a plurality of discharge electrodes are arranged at intervals from each other,
The discharge electrode bar has a built-in high voltage plate extending in the longitudinal direction thereof, and has a sleeve into which the electrode assembly can be inserted. By inserting the electrode assembly into the sleeve, the discharge electrode The ionization apparatus according to claim 1, wherein the ionization apparatus is electrically connected to the high-voltage board.   The ionization apparatus of Claim 7 which has a flange for enlarging creepage distance in the base end of the said sleeve. In an ionization apparatus that generates ionized air by applying a high voltage to the discharge electrode and causing corona discharge,
An electrode support member provided with a gas passage for supporting the discharge electrode and discharging clean gas from the tip end portion of the discharge electrode to the outside along the longitudinal direction of the discharge electrode;
A ring body having an opening through which a flow of clean gas discharged from the electrode support member passes at a position spaced apart from the electrode support member by a predetermined distance in the longitudinal direction of the discharge electrode; and the ring body and the electrode support body And a guard ring with a plurality of legs connected to each other,
The ring body has a shape that is continuous in the circumferential direction, and has a diameter that can prevent the penetration of a fingertip;
The clean gas discharged from the tip portion of the discharge electrode generates ionized air while entraining atmospheric air flowing into the guard ring through the external air introduction opening between the adjacent legs. Ionizer to do. In an ionization apparatus that generates ionized air by applying a high voltage to the discharge electrode and causing corona discharge,
An electrode support member provided with a gas discharge port for discharging the clean gas so as to surround the discharge electrode and surround the tip portion of the discharge electrode with the clean gas;
A finger disposed at a position spaced forward of the tip of the discharge electrode and having an opening that prevents finger contact with the tip of the discharge electrode from the front and allows ionized gas to flow out forward around the discharge electrode Guard,
A plurality of legs connected to the finger guard and the electrode support;
The clean gas flowing while surrounding the tip of the discharge electrode draws in the ionized air while entraining the ambient air flowing into the space surrounded by the plurality of legs through the external air introduction opening between the plurality of legs. An ionization apparatus characterized by producing. A discharge electrode assembly that is detachably assembled to an ionizer that generates ionized air by applying a high voltage to the discharge electrode to cause corona discharge,
A discharge electrode;
An electrode support member provided with a gas discharge port for discharging the clean gas so as to surround the tip portion of the discharge electrode with clean gas while supporting the discharge electrode;
A finger disposed at a position spaced forward of the tip of the discharge electrode and having an opening that prevents finger contact with the tip of the discharge electrode from the front and allows ionized gas to flow out forward around the discharge electrode Guard,
A plurality of legs connected to the finger guard and the electrode support;
The clean gas flowing while surrounding the tip of the discharge electrode draws in the ionized air while entraining the ambient air flowing into the space surrounded by the plurality of legs through the external air introduction opening between the plurality of legs. An electrode assembly produced.   The discharge electrode assembly according to claim 12, wherein the finger guard has a ring shape.   The discharge electrode assembly according to claim 12 or 13, wherein the gas discharge port is disposed coaxially with the discharge electrode. An ionizer that generates ionized air by applying a high voltage to a discharge electrode to cause corona discharge,
A discharge electrode;
An electrode support member provided with a clean gas passage for supporting the discharge electrode and discharging clean gas;
Provided with an opening that is arranged in front of the discharge electrode and that allows ionized air generated by applying a high voltage to the discharge electrode to flow out while preventing a finger from contacting the tip of the discharge electrode Finger guards,
A plurality of legs connected to the finger guard and the electrode support member, wherein the adjacent legs are spaced apart from each other in the circumferential direction, and outside air can pass between the adjacent legs;
The tip of the discharge electrode is disposed coaxially with the clean gas passage, and the tip of the discharge electrode is located at the center of the gas discharge port of the clean gas passage, and the tip of the discharge electrode is forward of the gas discharge port. An ionization device consisting of protrusions.   The ionization apparatus according to claim 15, wherein the finger guard has a ring shape.

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