JP4536587B2 - Discharge electrode bar of ionizer - Google Patents

Description

  The present invention relates to static electricity control in the air, and more particularly to a discharge electrode bar of an ionizer.

  Static electricity removal (static elimination) is performed to control static electricity in the air, such as cleaning in a clean room and preventing static charge of suspended particles. Corona discharge ionization devices are often used for this non-contact static elimination. Yes.

  1 to 2 show discharge electrode bars included in currently available DC ionizers. The discharge electrode bar 1 has an elongated cylindrical case 2, and the case 2 has a plurality of discharge electrodes 3 (FIG. 1) spaced apart from each other along the longitudinal direction. 2, a high voltage power supply unit 4 or a control unit 5 was accommodated between adjacent discharge electrodes 3 and 3. In addition, the discharge electrode bar 1 has a case 2 composed of an upper divided case portion 7 and a lower divided case portion 8 which are divided vertically (FIG. 2).

  Of the plurality of discharge electrode assemblies 3, the positive electrode is denoted by 3a and the negative electrode is denoted by 3b, which are identified in the drawing. Air can be supplied around the discharge electrodes 3 through a flexible tube 6 disposed inside the case 2.

  In order to assemble the conventional discharge electrode bar 1, first, the high voltage unit 4 and the control unit 5 must be fixed to the lower divided case portion 8. Since the operation of inserting and fixing the high voltage unit 4 and the control unit 5 in the portion 8 must be performed through the narrow opening 8a of the lower divided case portion 8, the lower divided case portion In many cases, the above work is performed with the 8 openings 8a being forcibly widened, and the workability is extremely poor.

  Therefore, an object of the present invention is to provide a discharge electrode bar of an ionization apparatus that can improve the work of assembling a built-in component of the discharge electrode bar.

According to the present invention, the above technical problem is
A discharge electrode bar of an ionization device for generating ions by applying a high voltage to each discharge electrode of a discharge electrode assembly fitted to each of a plurality of cylindrical portions protruding downward from an elongated case,
An independent air passage extending longitudinally in the lower region of the case and isolated from the atmosphere in the case;
A high voltage power supply unit and a control unit disposed in an upper region of the case and arranged side by side in the longitudinal direction of the case;
The case is composed of two divided cases that can be divided into right and left, the high voltage power supply unit and the control unit are fixed to one divided case, and the one divided case is opened with the other divided case removed. The high voltage power supply unit and the control unit can be assembled to the one split case from the side, and an air source is provided through an air port provided at a lower portion of end caps provided at both ends of the case and communicating with the independent air passage. Air is supplied to the independent air passage,
The air supplied from the air source is distributed from the independent air passage to the air discharge passage inside each discharge electrode assembly, and is discharged to the outside from the vicinity of the tip portion of the discharge electrode through the air discharge passage.
A connecting portion for distributing the high-voltage power generated by the high-voltage power supply unit to the discharge electrode is disposed above the independent air passage, and the high-voltage power distributed through the connecting portion is applied to the discharge electrode. Thus, this is achieved by providing a discharge electrode bar of an ionization device characterized in that air discharged to the outside from the vicinity of the tip portion of the discharge electrode of each discharge electrode assembly is ionized.

  That is, according to the present invention, the high-voltage power supply unit and the control unit and the independent air passage isolated from the atmosphere in the case are arranged separately in the upper and lower sides, and the high-voltage power supply generated by the high-voltage power supply unit is discharged to the discharge A connecting portion that distributes to the electrodes is disposed above the independent air passage, and further comprises two divided cases in which the case of the discharge electrode bar can be divided into left and right, and the high voltage power supply unit and the control in one divided case Since the unit is fixed and the other split case is removed, the high-voltage power supply unit and the control unit can be assembled to the one split case from the open side of the one split case. The workability of the assembly work can be improved.

BEST MODE FOR CARRYING OUT THE INVENTION

  In a preferred embodiment of the present invention, there is further provided a counter electrode plate attached to the lower surface of the case and extending in the longitudinal direction of the case, and the counter electrode plate includes a plurality of spaced apart electrodes in the longitudinal direction. The discharge electrode assemblies extend downward through the openings. According to this, the workability of assembling the counter electrode can be improved.

  In a preferred embodiment of the present invention, the discharge electrode assembly includes a discharge electrode and a cap that supports the discharge electrode. The cap includes a circular base that supports the discharge electrode, and the circular base. And an outer cylinder portion extending along the outer peripheral surface of the cylindrical portion, and the outer cylinder portion of the cap is fitted into the cylindrical portion. According to this, it is possible to improve the workability of assembling the discharge electrode.

  In a preferred embodiment of the present invention, the circular base has a small-diameter portion extending toward the rear end side of the discharge electrode and coaxial with the outer cylinder portion, and the discharge electrode is formed by the small-diameter portion. Is supported. According to this, the support rigidity of the discharge electrode can be increased.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 4 is a view for explaining the discharge electrode bar of the ionization apparatus of the embodiment. The discharge electrode bar 100 has a case 101. Inside the case 101, an air unit 102 and a discharge electrode assembly 103 are arranged in a lower region thereof, and a high voltage unit 104, a power supply circuit, A control unit 105 including a display circuit and a CPU is disposed. That is, the discharge electrode bar 100 is disposed in an upper region where the high voltage unit 104 and the control unit 105 serving as heat sources do not interfere with the discharge electrode assembly 103. Therefore, since there is no control unit or the like between the adjacent discharge electrode assemblies 103 as in the prior art, the interval between the adjacent discharge electrode assemblies 103 can be freely set.

  As can be seen from FIG. 5, the case 101 shows a state when the discharge electrode bar 100 is assembled, so that the case 101 is shown upside down from the case where the discharge electrode bar 100 is installed. The case 101 has an elongated U-shaped cross section, and the upper end (the lower end in the drawing) has a curved shape with a relatively smooth cross section, and has a side wall extending substantially vertically from the upper end. . The case 101 has a structure that is divided into right and left divided case portions 101R and 101L.

  The left and right divided case portions 101L and 101R are extrusion molded products made of a plastic material. The upper ends (lower ends in the drawing) of the left and right divided case portions 101L and 101R can be slidably fitted. That is, in the case 101 shown in the figure, an enlarged head 107 projecting in the lateral direction is formed at the upper end (lower end in the drawing) of the right split case portion 101R, and this enlarged head 107 extends along the upper end edge of the right split case portion 101R. Extending over the entire length of the right split case portion 101R. An upper end (lower end in the drawing) of the left split case portion 101L is formed with a groove 108 having a shape complementary to the contour of the enlargement head 107 at the upper end (lower end in the drawing). It extends in the longitudinal direction along the upper edge of 101L, and both ends of the groove 108 are open. The groove 108 can receive the enlargement head 107 from either end thereof. For example, the enlargement head 107 is inserted from one end of the groove 108, and the left and right divided case portions 101L and 101R are relatively moved in the longitudinal direction. The left and right divided case portions 101L and 101R are brought into a state in which they cannot be detached, and form an inverted U-shaped cross-sectional shape that opens toward the lower end (the upper end in the drawing). Of course, the enlargement head 107 may be provided in the left split case portion 101L, and the groove 108 may be provided in the right split case portion 101R.

  In the illustrated example of FIG. 5, the right split case portion 101R is integrally formed with a base plate portion 109 extending in the lateral direction, that is, in the horizontal direction on the side wall portion, and the base plate portion 109 extends over the entire length of the right split case portion 101R. It extends (see also FIG. 6). A bent portion 110 that is bent upward (downward in FIGS. 5 and 6) by 90 degrees is formed at the free end, that is, the side edge in the width direction of the base plate 109. On the other hand, an L-shaped portion 111 is formed on the side wall portion of the left divided case portion 101L, and the L-shaped portion 111 extends over the entire length of the left divided case portion 101L. The base plate portion 109 may be formed in the left divided case portion 101R, and the L-shaped portion 111 may be formed in the right divided case portion 101L.

  When the left and right divided case portions 101L and 101R are relatively slid and assembled, the bent portion 110 of the above-described base plate portion 109 opens downward (upward in FIG. 5) formed by the L-shaped portion 111. In this way, the base plate portion 109 constitutes a partition wall that substantially divides the case 101 up and down.

  The left and right split case portions 101L and 101R are formed with a pair of protrusions 113 below the lower end portion of the side wall (upper end portion in FIGS. 5 and 6), that is, below the base plate portion 109 (upward in the drawing). The protrusion 113 extends over the entire length of the split case portions 101L and 101R.

  FIG. 6 is an exploded perspective view for explaining an assembly process of the high voltage unit 104 and the control unit 105 arranged on the upper side of the case 101. Reference numeral 115 in FIG. 7 indicates a high voltage unit housing box having a rectangular cross section, and as will be described later, the high voltage unit 104 and a protective agent such as silicon are stored in the box 115 in a sealed state.

  The control unit 105 described above includes a modular board 116, a power supply board 117, a CPU board 118, and the like. The modular board 116 is fixed to the side wall of the right split case portion 101R with screws 120 via a pedestal 119. Also, a plastic engagement pin 121 is fixed to the side wall of the right split case portion 101R using a screw 120, and the hook-shaped retaining tip of the engagement pin 121 is connected to the power supply board 117 and the CPU board 118. By inserting into the holes, the power supply board 117 and the CPU board 118 are fixed to the side wall of the right split case portion 101R via the engagement pins 121. Moreover, the high voltage unit accommodation box 115 in which the high voltage unit 114 is stored is fixed to the side wall of the right split case portion 101 </ b> R using a double-sided tape 123.

  As can be understood from the above description, since the work can be performed in an open space, the assembling work of the control unit 105 and the high voltage unit 114 is relatively easy.

  The modular board 116, the power supply board 117, the CPU board 118, and the high voltage unit accommodation box 115 fixed to the right split case portion 101R by the above-described method are arranged in the right split case in the upper region of the base plate portion 109 of the right split case portion 101R. Arranged in a line along the longitudinal direction of the portion 101R. Note that the base plate portion 109 of the right split case portion 101R includes a notch 109a (FIG. 6) at the end portion in the longitudinal direction, and the cable 125 with high voltage socket and the GND cable 126 are connected to the base plate portion 109 through the notch 109a. Is taken out into the lower area of When the notch 109a is relatively large, the notch 109 is substantially blocked by the packing 127 (FIG. 6), and thereby the gas between the upper region and the lower region is sandwiched between the base plate portion 109. It is preferable to prevent distribution as much as possible.

  As shown in FIG. 5, an air unit 102 is provided under the base plate portion 109 (upper in the drawing). The air unit 102 has a flange 131 extending outward in the width direction, and the flange 131 extends in the longitudinal direction of the air unit 102. On the upper wall (lower wall in the drawing) of the air unit 102, a plurality of circular bosses 132 extending upward (downward in the drawing) are provided at intervals in the longitudinal direction of the air unit 102. A plurality of discharge electrode assembling cylindrical portions 133 are formed on the lower wall (upper wall in the drawing) of the air unit 102 at intervals in the longitudinal direction. An air tube joint 134 is provided on the end wall of the air unit 102, and a flexible tube 135 is fitted into the joint 134 to connect adjacent air units 102, and an air source (not shown). ) Is connected to an air port 136 (FIG. 4) that receives supply of air from the fluid passage. Air introduced from the air source to the air port 136 (FIG. 4) passes through the air unit 102 and is discharged to the outside from each discharge electrode assembly 103.

  In order to incorporate the air unit 102 into the case 101, as shown in FIG. 6, for example, a flange 131 of the air unit 102 is formed in a groove 137 (FIG. 5) formed by the base plate portion 109 and the protrusion 113 of the right split case portion 101R. Is inserted by inserting the circular boss 132 of the air unit 102 into the elongated hole 137 extending in the width direction of the base plate portion 109. By assembling the other left split case portion 101L to the right split case portion 101R by the method described above, the air unit 102 is placed in a state where the left and right flanges 131 are received in the grooves 137. The movement of the air unit 102 in the longitudinal direction is substantially prevented by the engagement between the circular boss 132 and the elongated hole 137. For example, by attaching a cushioning material such as a rubber sheet 138 (FIG. 6) to the surface of the flange 131, play in the vertical direction of the air unit 102 after mounting the air unit 102, that is, rattling, may be prevented. Good.

  When the control unit 105 and the air unit 102 are assembled between the left and right divided case portions 101L and 101R by the above-described steps, the air unit 102 is covered with a GND plate 140 as shown in FIG. As a result, the elongated opening portion having an inverted U-shaped cross section formed by the left and right divided case portions 101L and 101R is covered with the GND plate 140.

  The GND plate 140 has an opening 141 at a portion corresponding to the cylindrical portion 133 of the air unit 102. The diameter of the opening 141 is larger than the diameter of the outer contour of the cylindrical portion 133. The GND plate 140 is fixed by screwing a screw 143 penetrating therethrough into a receiving boss 144 formed on the lower wall (the wall facing upward in the drawing) of the air unit 102.

  The case 101 includes a pair of end caps 145 (FIG. 5), and both end openings of the left and right divided case portions 101 </ b> L and 101 </ b> R provided with the GND plate 140 are closed by attaching the end caps 145. The end cap 145 is fixed to the left and right split case portions 101L and 101R using screws 146.

  In FIG. 7, the discharge electrode assembly 103 includes an electrode 150 made of, for example, tungsten and a cap 151 that supports the electrode 150. The cap 151 includes a circular base 152 that supports the vicinity of the tip of the electrode 150, and extends vertically from the periphery of the circular base 152, surrounds the periphery of the tip of the electrode 150, and the outer peripheral surface of the cylindrical portion 133 of the air unit 102. The outer cylinder part 153 to be engaged and the small-diameter part 154 extending to the vicinity of the rear end of the electrode 150 along the electrode 150, and the outer cylinder part 153 of the assembly 103 can be attached to and detached from the cylindrical part 133 of the air unit 102. By fitting, the discharge electrode assembly 103 is fixed to the air unit 102, and the small-diameter portion 154 of the assembly 103 and the cylindrical portion 133 of the air unit 102 release air through the air passage 156 of the air unit 102. A passage 157 is formed. 7 indicates a seal member interposed between the lower end surface of the outer cylinder portion 153 and the circular base 152. Air from the air source is discharged from an air discharge port (not shown) near the electrode 150 of the discharge electrode assembly 103 from the air unit 102 (air passage 156) through the air discharge passage 157 to the outside.

  The air unit 102 includes a sleeve 158 that receives a rear end portion (upper end portion in FIG. 8) of the small-diameter portion 154 of the discharge electrode assembly 103, and a bottom portion surrounded by the sleeve 158 has a high height made of stainless steel. A voltage distribution board 159 is installed. The high voltage distribution board 159 is accommodated in a sealed state in a space formed in the unit 102 (a space communicating with the sleeve 158) so as not to be exposed to the outside along the longitudinal direction of the sleeve 158.

  When the assembly 103 is incorporated into the circumferential portion 133 of the air unit 102, the small diameter portion 154 is fitted into the sleeve 158, and the rear end surface of the electrode 150 comes into contact with the cut-and-raised portion 159a of the high voltage distribution plate 159 to electrically Connected.

  The rear end portion (upper end portion in FIG. 8) of the small diameter portion 154 has a circumferential groove around it, and an O-ring 160 is provided in the circumferential groove. When the small-diameter portion 154 is fitted into the sleeve 158, the O-ring 160 seals the space 162 where the rear end of the high voltage distribution plate 159 and the electrode 150 is located.

  For the cap 151 of the assembly 103, it is desirable to use a material excellent in creeping discharge resistance, for example, a resin material having a high TI value. Thereby, insulation against creeping discharge can be ensured. For example, one or more of the illustrated circumferential flanges 162 may be provided on the outer peripheral surface of the cap 151 or the outer cylinder portion 153 of the air unit 102 to ensure the creeping distance. The size of the opening 141 of the GND plate 140 is such that there is a separation distance between the peripheral edge forming the opening 141 and the outer peripheral edge of the circumferential flange 162 of the outer cylinder portion 153 of the cap 151 or the air unit 102. It is better to set and prevent the creepage distance between them. This separation distance is preferably set to a certain distance or more in consideration of the voltage applied to the discharge electrode 150 in order to prevent discharge due to a spatial path.

  The air unit 102 is made of several parts. In order to join these parts to each other, in particular, the parts forming the air passage 156 are joined by welding using, for example, an ultrasonic welding method. It is good. By fixing each part of the air unit 102 by welding, it is possible to improve insulation and prevent a creeping path from being formed on the mating surface of each part, and the parts constituting the air unit 102 Are assembled in close contact with each other, so that an independent air passage completely isolated from the atmosphere in the case 101 is formed until the air introduced from the air source through the air port 136 is discharged from the discharge electrode assembly 103. can do.

  Whether air is supplied from the air source to the air port 136 and discharged from the discharge electrode assembly 103 is arbitrary. In relation to the user's factory equipment, discharge may be performed while discharging air from the discharge electrode assembly 103, or the discharge electrode assembly 103 may be used without discharging air from the discharge electrode assembly 103. Also good. When air is not discharged from the discharge electrode assembly 103, the case 101 having the inverted U-shaped cross section of the discharge electrode bar 100 is relatively narrow, and the vertical length of the side wall of the case 101 is relatively long. Further, the air flow flowing below the atmosphere around the discharge electrode bar 100 can be allowed to pass through without being disturbed, and the static elimination speed can be increased.

  If the internal air passage 156 is omitted from the discharge electrode bar 100, instead of the air unit 102, a base substantially including a sleeve 158 and a high voltage distribution plate 159 disposed at the bottom surrounded by the sleeve 158, It is enough to prepare. The high voltage distribution board 159 is preferably surrounded by an appropriate plastic molding material so as not to be exposed to the outside. This eliminates the need to cover the high voltage board 159 with a silicon filler.

  As can be understood by those skilled in the art, the power supply of the above-described discharge electrode bar 100 and the ionizer including the same may be AC or DC. Since the case 101 of the discharge electrode bar 100 is composed of the left and right divided case portions 101L and 101R, the discharge electrode bar 100 can be easily assembled. Further, since the inside of the case 101 is substantially vertically divided by the base plate portion 109, the upper region can be substantially isolated from the lower region.

It is a figure for demonstrating the structure of the conventional discharge electrode bar. It is sectional drawing along the II-II line | wire of FIG. 1 for demonstrating the structure of the conventional discharge electrode bar. It is a figure for demonstrating the structure of the discharge electrode bar according to this invention. It is an assembly exploded perspective view of the discharge electrode bar of an example. It is a disassembled perspective view which shows the state which attaches an air unit to one division | segmentation case part of a case. It is a disassembled perspective view which shows the state which attaches a power supply unit etc. to one division | segmentation case part of a case. It is principal part sectional drawing for demonstrating the structure of the discharge electrode assembly employ | adopted in the Example, and the assembly | attachment to an air unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Discharge electrode bar 101 Case 101R Right division | segmentation case part 101L Left division | segmentation case part 102 Air unit 103 Discharge electrode assembly 104 High voltage unit 105 Control unit 133 Cylindrical part for discharge electrode assembly 136 Airport 140 GND plate 141 Opening of GND plate 145 End Cap 150 Discharge electrode 151 Cap 152 Circular cap base 153 Cap outer cylinder portion 154 Cap small diameter portion 156 Air unit internal air passage 157 Air discharge passage 159 High voltage distribution plate 159a Cut portion of high voltage distribution plate (connection portion) )
S Seal member

Claims (7)

A discharge electrode bar of an ionizer that generates ions by applying a high voltage to each discharge electrode (150) of a discharge electrode assembly fitted to each of a plurality of cylindrical portions (133) projecting downward from an elongated case. Because
An independent air passage extending longitudinally in the lower region of the case and isolated from the atmosphere in the case;
A high voltage power supply unit and a control unit disposed in an upper region of the case and arranged side by side in the longitudinal direction of the case;
The case is composed of two divided cases that can be divided into right and left, the high voltage power supply unit and the control unit are fixed to one divided case, and the one divided case is opened with the other divided case removed. The high voltage power supply unit and the control unit can be assembled to the one split case from the side, and an air source is provided through an air port provided at a lower portion of end caps provided at both ends of the case and communicating with the independent air passage. Air is supplied to the independent air passage,
The air supplied from the air source is distributed from the independent air passage to the air discharge passage inside each discharge electrode assembly, and is discharged to the outside from the vicinity of the tip portion of the discharge electrode through the air discharge passage.
A connecting portion for distributing the high-voltage power generated by the high-voltage power supply unit to the discharge electrode is disposed above the independent air passage, and the high-voltage power distributed through the connecting portion is applied to the discharge electrode. Thus, the discharge electrode bar of the ionization apparatus is characterized in that air discharged to the outside from the vicinity of the tip end portion of the discharge electrode of each discharge electrode assembly is ionized.   The discharge electrode bar of the ionization apparatus according to claim 1, wherein the connection portion is sealed from an atmosphere in an upper region of the independent air passage and the case. A counter electrode plate attached to the lower surface of the case and extending in the longitudinal direction of the case;
The discharge electrode of the ionization apparatus according to claim 1 or 2, wherein the counter electrode plate is formed with a plurality of openings spaced apart from each other in the longitudinal direction, and each discharge electrode assembly extends downward through each opening. bar. The discharge electrode assembly includes a discharge electrode and a cap supporting the discharge electrode;
The cap has a circular base that supports the discharge electrode, and an outer cylindrical portion that extends from the periphery of the circular base along the outer peripheral surface of the cylindrical portion, and the outer cylindrical portion of the cap is connected to the cylindrical portion. The discharge electrode bar of the ionization device according to claim 3, which is fitted.   The circular base has a small diameter portion extending toward the rear end side of the discharge electrode and coaxial with the outer cylinder portion, and the discharge electrode is supported by the small diameter portion. Discharge electrode bar of ionizer.   Abutting against the circular base via a seal member interposed between the lower end surface of the cylindrical portion and the circular base, thereby forming the air discharge passage on the inner peripheral side of the cylindrical portion; The discharge electrode bar of the ionization apparatus according to claim 5.   The discharge electrode bar of the ionization apparatus as described in any one of Claims 1-6 which further has a partition wall which blocks | prevents the flow of gas from the upper area | region in which the said high voltage power supply unit and the control unit were provided.

Images