JP2017050197A - Static eliminator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a static eliminator capable of discharging an air flow containing positive ions and negative ions at a good balance therein, with a simple constitution.SOLUTION: A static eliminator A includes: a duct; a blower 1 for generating an air flow flowing inside the duct in the axial direction; and a plurality of ion generators 21 having at least a pair of discharge needles 212, 213 for generating ions having different polarities. The ion generators 21 are positioned in the duct so that at least the tip ends of the discharge needles 212, 213 protrude into the inside of the duct, and the plurality of ion generators 21 are positioned across gaps in the circumferential direction of the duct.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a static eliminator that performs static elimination with ions generated by discharge of a discharge electrode.

  There exists a thing shown in patent document 1 as a conventional static elimination apparatus. The static eliminator includes a frame portion having a substantially octagonal front and rear surface inside a box-shaped main body, and a motor-equipped fan held by a plurality of ribs inside the frame portion, and an inner peripheral surface of the frame portion And a plurality of pairs of needle-like discharge electrodes plus and minus are provided. According to this static eliminator, plus / minus ions generated by the discharge of the needle-like discharge electrode are sent forward by blowing air from the fan. As a result, the charge is eliminated by positive and negative ions.

Japanese Patent No. 4410258 (paragraphs 0019 to 0020)

  However, in the case of the conventional static elimination apparatus, since the needle-like discharge electrodes are provided in an octagonal frame portion, there is a portion where the interval between the adjacent needle-like discharge electrodes is narrow. Since the air blown by the fan is a spiral flow, the portion where the interval between the needle-like discharge electrodes is narrow is easily neutralized by the contact between the negative ions and the positive ions. Thereby, there exists a possibility that ion balance may worsen.

  Further, the size of the frame body varies depending on the required air volume of the fan. And since the shape of the said frame is a substantially octagon, when the magnitude | size of the said frame changes, the magnitude | size of a side will also change. Therefore, it is necessary to adjust the installation positions of the plurality of pairs of needle-like discharge electrodes, which requires labor and time for manufacturing.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a static eliminator capable of sending an air stream containing positive ions and negative ions in a balanced manner with a simple configuration.

  In order to achieve the above object, the present invention provides a plurality of ion generators including a duct, a blower that generates an airflow flowing in the axial direction inside the duct, and at least a pair of discharge needles that generate ions having different genders. The ion generator is disposed in the duct so that at least the tip of the discharge needle protrudes into the duct, and the plurality of ion generators are spaced in the circumferential direction of the duct. A static eliminator arranged with a gap is provided.

  According to this configuration, since the ion generator is arranged in the circumferential direction of the duct, it is possible to distribute ions throughout the duct.

  In the above configuration, the adjacent discharge needles may generate ions having different polarities, and the tips of the discharge needles may be arranged at equal intervals in the circumferential direction. By arranging in this way, it is possible to increase the ion balance (concentration balance) in the duct.

  In the above configuration, the portion of the duct between the blower and the ion generator divides the inside of the duct into the same number of regions as the discharge needle in the circumferential direction and rectifies the airflow in the axial direction. A member may be provided, and each region divided by the rectifying member may overlap with at least one discharge needle in the axial direction. With this configuration, the airflow flowing toward the discharge needle is axial, and the discharge needle is provided for each region. Therefore, the airflow including ions generated by the discharge needle is changed to the airflow that flows from the adjacent region. It is difficult to collide with contained ions, and ions are not easily neutralized. Thereby, it can suppress that the quantity of the ion blown outside is reduced. In addition, since the spiral flow is rectified in the axial direction, the in can be delivered to a greater distance.

  In the above configuration, the blower includes an axial flow propeller and an electric motor that rotationally drives the axial flow propeller, the electric motor is provided inside the duct, and an outer peripheral surface of the electric motor is the discharge needle. It arrange | positions so that the front-end | tip of may oppose to the radial direction of the said duct. Generally, a flow in the reverse direction is generated at the central portion of the axial flow propeller on the air flow discharge side, and vortices are likely to be generated. By arranging the electric motor in a portion where the vortex is likely to be generated, the generation of the vortex is suppressed. As a result, it is possible to eliminate ions entrained in the vortex and to suppress neutralization of ions of different polarities entrained in the vortex.

  In the above configuration, the duct includes a cylindrical portion having a circular cross section, and a mounting portion that is integrally connected to the cylindrical portion and in which the ion generator is disposed, and the mounting portion is a portion of the discharge portion. You may have the some plane part which attaches each, and the connection part which connects the said some plane part to the circumferential direction.

  The said structure WHEREIN: The said connection part may be a curved surface, and the center of curvature of the said connection part may overlap with the center axis | shaft of the said duct.

  In the above configuration, a cross-sectional area of a cross section perpendicular to the axis of the mounting portion is smaller than a cross-sectional area of a cross section perpendicular to the axis of the cylindrical portion, and an inclined surface is formed that decreases from the cylindrical portion toward the mounting portion. May be.

  The said structure WHEREIN: The polygon which has a side twice as many as the number of the said ion generator may be sufficient.

  The said structure WHEREIN: The discharge part made flat in one direction perpendicular | vertical to the axis | shaft of the said duct may be provided in the downstream of the airflow rather than the said discharge part of the said duct. You may make it change according to a use so that a discharge part can be attached or detached.

  ADVANTAGE OF THE INVENTION According to this invention, the static elimination apparatus which can send out the air flow in which positive ion and negative ion are contained with sufficient balance by simple structure can be provided.

It is a front view of an example of the static elimination apparatus provided with the ion generator concerning this invention. It is a side view of the static elimination apparatus shown in FIG. It is sectional drawing of the static elimination apparatus shown in FIG. It is a disassembled perspective view of the static elimination apparatus shown in FIG. It is the schematic which shows an example of the ion generator with which the ion generator concerning this invention is equipped. It is sectional drawing which cut | disconnected the duct of the static elimination apparatus by the surface perpendicular | vertical to an axis | shaft. It is sectional drawing cut | disconnected by the surface along the axis | shaft of the duct shown in FIG. It is the figure which looked at the duct of the other example of the static elimination apparatus concerning this invention to the axial direction. It is sectional drawing cut | disconnected by the surface along the axis | shaft of the duct shown in FIG. It is the schematic which shows the arrangement | positioning state of the ion generator of the static elimination apparatus concerning invention. It is the schematic which shows the arrangement | positioning state of the ion generator of the static elimination apparatus concerning invention. It is a front view which shows an example of the louver used for the static elimination apparatus concerning this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is a front view of an example of a static eliminator provided with an ion generator according to the present invention, FIG. 2 is a side view of the static eliminator shown in FIG. 1, and FIG. 3 is a cross-sectional view of the static eliminator shown in FIG. FIG. 4 is an exploded perspective view of the static eliminator shown in FIG. As shown in FIGS. 1 and 2, the static eliminator A includes a blower 1, an ion generator 2, an outlet 3, a stand 4, and a substrate housing 5.

  In FIG. 2, the right side is the back side, the ion generating device 2 is arranged in contact with the front side of the blower 1, and the outlet 3 is arranged in contact with the front side of the ion generating device 2. The blower 1, the ion generator 2, and the outlet 3 are fixed with fasteners such as screws. The blower 1, the ion generator 2, and the outlet 3 are combined so that the central axes coincide with each other, and a duct Dt in which an airflow flows in the axial direction is formed. In the duct Dt, the airflow flows from the back side to the front side.

  The blower 1 includes a blower case 101, a blower cover 102, a fan 103, a fan case 104, a stator 105 (rectifying member), a motor 106, and a filter cover 107. The blower case 101 is a cylindrical bottomed box, and includes a suction port 108 for sucking air into a central portion of the bottom. A fan case 104 is disposed inside the blower case 101. The fan case 104 has a cylindrical shape and serves as a guide for airflow (a part of the duct Dt).

  A fan 103 is provided inside the fan case 104 so as to be rotatable about the central axis. The fan 103 is an axial fan (propeller fan in this case), and when the fan 103 rotates, an airflow flowing in the axial direction is generated. The airflow generated by the fan 103 is a spiral airflow, and has a circumferential speed component and an axial speed component. As the fan 103 rotates inside the cylindrical fan case 104, the air current is prevented from being dispersed radially outward.

  A plurality (six in this case) of stators 105 having a spiral surface in the opposite direction to the blades of the fan 103 are provided on the downstream side of the airflow of the fan case 104. The plurality of stators 105 are arranged at regular intervals in the circumferential direction of the shaft. By providing the stator 105 twisted in the same direction as the swirling direction of the airflow on the downstream side of the fan case 104, the circumferential velocity component of the spiral airflow is rectified so as to become the axial velocity component. The stator 105 may have a spiral blade shape opposite to the fan 103, or may be a flat plate member. Here, the fan case 104 and the stator 105 are integrally formed, but the stator 105 may be attached and fixed to the fan case 104.

  As shown in FIGS. 3 and 4, the motor 106 is fixed to the downstream side of the fan case 104 so that the main body protrudes outward with the stator 105 interposed therebetween. The drive shaft of the motor 106 protrudes inside the fan case 104, and the fan 103 is fixed to the drive shaft. As the drive shaft of the motor 106 rotates, the fan 103 fixed to the drive shaft rotates. As shown in FIGS. 3 and 4, the plurality of stators 105 also serve as support members for disposing the motor 106 in the central portion of the fan case 104.

  The fan case 104 to which the fan 103 and the motor 106 are attached is fixedly attached to the fan case 101 so that the fan 103 is on the upstream side, the motor 106 is on the downstream side, that is, the fan 103 is on the back side and the motor 106 is on the front side. Is done. Note that the centers of the fan 103 and the motor 106 coincide with the center of the blower case 101. The fan case 104 is disposed so as to surround the suction port 108 of the blower case 101. The air generated by the rotation of the fan 103 causes the air sucked from the suction port 108 to flow into the fan case 104 without waste.

  The blower case 102 is disposed so as to cover the opening on the front side of the blower case 101. The blower cover 102 is fixed to the blower case 101 together with the fan case 104 by screws. The fan case 104 is fixed inside the blower case 101 by fixing the blower cover 102 to the blower case 101. The blower cover 102 has a through hole 110 formed in the central portion, and the air flow generated by the rotation of the fan 103 flows through the through hole 110 to the front side of the blower 1.

  The through hole 110 of the blower cover 102 has a shape that matches the arrangement state of a discharge unit 203 (described later) of the ion generator 2. Specifically, when attached to the front side of the blower case 101, a plurality of linear portions provided at equal central angular intervals and normal lines are orthogonal to the central axis around the central axis of the blower case 101, and It has a shape in which the ends of the straight portions are connected by an arc centered on the central axis. When the blower cover 102 is attached to the blower case 101, the main body portion of the motor 106 passes through the through hole 110.

  The blower 1 has the above-described configuration. By controlling the motor 106 and rotating the fan 103, an airflow in the axial direction is generated, and an airflow directed in the axial direction from the through hole 110 of the blower cover 102 is generated. Occur. Further, a filter (not shown) is disposed on the back side of the blower case 101, and a filter cover 107 that holds the filter so as not to drop off is attached. That is, the outside of the suction port 108 is covered with a filter, and when air is sucked from the suction port 108, foreign matters such as dust are collected by the filter. Thereby, it can suppress that a foreign material is suck | inhaled inside the air blower 1. FIG.

  Next, the ion generator 2 will be described. The ion generator 2 includes a unit case 201, a unit cover 202, a plurality of (here, three) ion generators 21 and an ion detector 6. The unit case 201 has a bottomed cylindrical shape, and is provided with a vent 203 having the same shape as the through hole 110 of the blower cover 102 on the bottom surface portion. A rib 204 for holding the ion generator 21 protrudes in the axial direction at the edge of the vent 203. The rib 204 constitutes a part of the duct Dt for holding the ion generator 21 and preventing the airflow blown out from the through hole 110 of the blower cover 102 from leaking.

  The ion generator 21 is an ion generator that generates positive ions and negative ions by discharge. The ion generator 203 will be described with reference to the drawings. FIG. 5 is a schematic view showing an example of an ion generator used in the static eliminator according to the present invention. The ion generator 21 includes a case 211, a plus discharge needle 212, and a minus discharge needle 213. In addition, a drive circuit (not shown) for causing the plus discharge needle 212 and the minus discharge needle 213 to generate a discharge is provided inside the case 211. The drive circuit includes a step-up transformer for applying a large voltage between the plus discharge needle 212 and the minus discharge needle 213. By performing discharge with the plus discharge needle 212 and the minus discharge needle 213, plus ions and minus ions are generated, respectively.

  The ion generator 21 is arranged so that the plus discharge needle 212 and the minus discharge needle 213 are at a distance L1 from one of the side surfaces of the case 211. The positive discharge needle 212 and the negative discharge needle 213 are disposed in the duct Dt on the rib 204 of the unit cover 202 of the ion generator 21, that is, the positive discharge needle 212 and the negative discharge needle 213 are ventilated when viewed from the axial direction. It arrange | positions so that the opening | mouth 203 may overlap. In addition, in the ion generator 2 used for the static elimination apparatus A of this embodiment, the three ion generators 21 are arrange | positioned so that an equicenter angle (here 120 degrees) may be made in the circumferential direction of the duct Dt. .

  Then, the three ion generators 21 are arranged on the rib 204 of the unit case 201 so that the plus discharge needle 212 and the minus discharge needle 213 protrude inside the duct Dt, and the unit cover 202 is attached. By fixing the unit case 201 and the unit cover 202 with a fixture such as a screw, the ion generator 21 is held so as not to be detached. Details of the arrangement of the ion generator 21 will be described later.

  A circular through-hole 205 is provided in the central portion of the unit cover 202, and a cylindrical rib 206 protruding radially downstream from the edge of the through-hole 205 is provided. The rib 206 is a member constituting a part of the duct Dt. The air flow blown out from the through hole 110 of the blower cover 102 of the blower 1 flows in a part of the duct Dt formed inside the ion generator 2 in the axial direction. And it blows outside from the opening of the downstream side of the rib 206 of the unit cover 202. Note that positive ions and negative ions are generated by the discharge of the positive discharge needle 212 and the negative discharge needle 213 of the ion generator 21. Then, by generating positive ions and negative ions inside the duct Dt, the positive ions and negative ions are blown out together with the air flow.

  An outlet 3 is provided on the downstream side of the unit cover 202 of the ion generator 2. The outlet 3 includes a louver 301 and a grid 302. The grid 302 is, for example, a mesh-like member, and is a member for maintaining safety for preventing a user's fingers and the like from entering from the outlet 3. The louver 301 is attached downstream of the unit cover 202 and has a through hole 303 having the same inner diameter as the rib 206. And airflow is blown out from the through-hole 303 of the louver 301 to the front side. Therefore, the louver 301 is a member for adjusting the blowing direction of the airflow. Further, it is a pressing member for pressing the grid 302.

  The substrate housing part 5 includes a rectangular parallelepiped case 501 integrally formed at the lower part of the blower case 101 and a front cover 502 provided at the lower part of the blower cover 102. Then, the front cover 502 covers the front surface of the case 501 by attaching the blower cover 102 to the blower case 101. A substrate Bd provided with a control circuit for controlling the rotation of the fan 103 of the blower 1 and controlling the discharge of the ion generator 21 of the ion generator 2 is disposed inside the substrate housing 5.

  Further, the front cover 502 is provided with an operation unit that receives an operation by the user. The operation unit has, for example, a configuration including a push button that allows physical operation input. The operation unit is connected to the substrate Bd. When the operation unit is operated, the operation is sent as an operation signal to the control circuit of the substrate Bd. The control circuit performs rotation control of the fan 103 and discharge control of the ion generator 21 based on the operation signal.

  In addition, in this embodiment, although the board | substrate accommodating part 5 shall be formed integrally with the air blower 1, the structure formed separately and combined may be sufficient. Moreover, the board | substrate accommodating part 5 can also be abbreviate | omitted by setting it as the structure which accommodates the board | substrate Bd in the inside of the air blower 1. FIG.

  The stand 4 pivotally supports the case 501 of the substrate housing 5. The stand 4 includes a leg portion 401 and a hinge portion 402 that are arranged in parallel. The case 501 of the substrate housing part 5 is supported so that the static eliminator A rotates in the front-rear direction. And it has the structure which can be stopped at the angle which a user desires. As such a configuration, for example, there can be mentioned a structure in which a bearing having a large friction such as a rubber bush can be attached and fixed at an arbitrary position, and a structure whose angle can be fixed by screwing.

  In the static eliminator A having the above-described configuration, the positive discharge needle 212 and the negative discharge needle 213 of the ion generator 21 are discharged, and the fan 103 is driven to span the blower 1 and the ion generator 2. The positive ions and the negative ions generated inside the formed duct Dt are put on an air current and released to the outside.

(First embodiment)
Next, the arrangement of the ion generator 21, which is a main part of the present invention, will be described with reference to the drawings. 6 is a cross-sectional view of the duct of the static eliminator cut along a plane perpendicular to the axis, and FIG. 7 is a cross-sectional view cut along a plane along the axis of the duct shown in FIG. The duct Dt shown in FIGS. 6 and 7 is a part of the duct, and is a duct Dt configured by the fan case 104 and the rib 204 that holds the ion generator of the ion generator 2.

  As shown in FIG. 6, the static eliminator A is arranged such that the plus discharge needle 212 and the minus discharge needle 213 protrude inside the duct Dt (here, the rib 204 of the unit case 201). On the inner surface of the duct Dt, a portion where the three ion generators 21 are arranged is formed by a plane Dt1, and adjacent planes Dt1 are connected by a curved surface Dt2.

  Each of the three ion generators 21 is arranged around the central axis of the duct Dt with an angle of 120 °. The three ion generators 21 are arranged so that adjacent discharge needles have different polarities. That is, the plus discharge needle 212 and the minus discharge needle 213 of each ion generator 21 are arranged in the same direction in the circumferential direction. The space between the positive discharge needle 212 and the negative discharge needle 213 of the ion generator 21 is the distance L1, and the distance between the positive discharge needle 212 and the negative discharge needle 213 of the adjacent ion generator 21 is also the distance L1. Has been.

  By arranging the ion generators 21 in this way, the electromagnetic attractive force between the plus discharge needle 212 and the minus discharge needle 213 in each ion generator 21 and the plus discharge needle 212 or minus discharge of the adjacent ion generator 21 are obtained. Generating positive ions and negative ions so that the relationship between the needle 213 and the electromagnetic attraction is equal, and the amount (concentration) of positive ions and negative ions is small in the duct Dt, that is, the balance is improved. Can do.

  Then, on the upstream side of the ion generator 21 of the duct Dt, six stators 105 having a surface twisted in the direction opposite to the twist of the airflow generated by the rotation of the fan 103 are arranged at equal intervals in the circumferential direction. Yes. The stator 105 rectifies the airflow generated by the rotation of the fan 103 into an airflow flowing in the axial direction. As shown in FIG. 6, the duct 105 is equally divided in the circumferential direction by the stator 105. The end of each stator 105 on the duct Dt side is provided at a position separating the plus discharge needle 212 and the minus discharge needle 213 of the ion generator 21. This equally divided region and one of the positive discharge needle 212 or the negative discharge needle 213 of each ion generator 21 are arranged so as to overlap in the axial direction.

  By passing through the space divided by the stator 105 of the duct Dt, the flow direction of the airflow is the axial direction, and the plus discharge needle 212 or the minus discharge needle 213 is arranged at a position overlapping with each region in the axial direction. As a result, even if adjacent discharge needles generate ions of opposite polarity, the ions of opposite polarity are not easily mixed by the air flow, and the amount of ions blown to the outside can be increased.

  Further, as shown in FIG. 7, the plus discharge needle 212 and the minus discharge needle 213 of the ion generator 21 are provided at positions overlapping the motor 106 and the duct Dt in the axial direction. In other words, the motor 106 is disposed so as to face the positive discharge needle 212 and the negative discharge needle 213 of all the ion generators 21 in the direction (radial direction) intersecting the axis of the duct Dt. The motor 106 is provided downstream of the stator 105 on the downstream side of the airflow generated by the fan 103.

  In the vicinity of the side of the propeller fan that discharges air, an air flow in the direction opposite to the airflow sent from the fan is generated around the central axis. That is, vortices and the like are likely to occur in the region around the central axis on the downstream side of the propeller fan. When an air stream containing ions flows in this region, positive ions and negative ions are mixed and neutralized by being combined, thereby reducing the amount of ions. Therefore, by arranging the motor 106 in the central portion of the duct Dt near the downstream of the fan 103, the generation of airflow in the reverse direction is suppressed. Thereby, generation | occurrence | production of a vortex is suppressed and it suppresses that the ion blown out of the static elimination apparatus A reduces.

  As described above, in the static eliminator A according to the present invention, the positive discharge needles 212 and the negative discharge needles 213 are alternately arranged at equal intervals in the circumferential direction of the duct Dt. The bias between ions and negative ions can be suppressed.

  Further, since the spirally generated airflow generated by the fan 103 is corrected to the axially flowing airflow by the stator 105, the airflow is not easily mixed. The duct Dt is divided into six equal parts by the stator 105, and one plus discharge needle 212 or one minus discharge needle 213 is provided on the downstream side of each region. Since the airflow flowing in the axial direction flows out from the region partitioned by the stator 105, even if the plus discharge needle 212 and the minus discharge needle 213 are arranged next to each other, the airflow containing plus ions and the airflow containing minus ions are generated. It is difficult to mix and ions are not easily neutralized.

  And the force sent out to an axial direction is increased by converting the velocity component of the circumferential direction of an airflow into an axial direction with the stator 105. FIG. From the above, in the static eliminator A according to the present invention, it is possible to blow far away an air current having a high ion concentration (because ions are not easily neutralized) with little bias between positive ions and negative ions.

  The ion generator 21 is described as an example provided with a pair of plus discharge needles 212 and minus discharge needles 213, but is not limited to this, and a plurality of pairs of plus discharge needles 212 and minus discharge needles 212 are provided. A discharge needle 213 may be provided. In this case, a plurality of discharge needles are arranged so as to overlap with the region divided by the stator 105. Note that it is preferable that the number of discharge needles overlapping with the region divided by the stator 105 is the same, because the ion bias can be suppressed.

(Second Embodiment)
Another example of the static eliminator according to the present invention will be described with reference to the drawings. FIG. 8 is a view of another example of the duct of the static eliminator according to the present invention viewed in the axial direction, and FIG. 9 is a cross-sectional view taken along a plane along the axis of the duct shown in FIG. The static eliminator according to this embodiment is the same as the static eliminator A according to the first embodiment except that the shape of the duct Ds is different, and a detailed description of substantially the same parts is omitted.

  As shown in FIGS. 8 and 9, the duct Ds includes a cylindrical duct Ds1 on the upstream side and a tapered duct Ds2 formed so that the cross-sectional area becomes narrower downstream on the downstream side. The cylindrical duct Ds1 and the tapered duct Ds2 are integrally formed so that the inner surfaces are continuous. The tapered duct Ds2 is deformed so that the connecting portion with the cylindrical duct Ds1 has an annular cross section and gradually has a hexagonal cross section with a predetermined distance toward the tip. ing).

  Thus, by gently deforming from the cylindrical shape to the hexagonal shape, when the ion generator 21 is installed in the hexagonal shape, it is possible to reduce the portion that obstructs the air path by the ion generator 21. Thereby, the turbulence of the airflow can be suppressed, and an airflow with little bias and high ion concentration (a large amount of ions can be contained) can be discharged to the outside.

  In the present embodiment, since three ion generators 21 are provided, the hexagonal shape is narrowed. However, the narrowed shape may be changed according to the number of ion generators 21. In addition, the shape of the through hole 110 and the vent hole 203 of the first embodiment is not limited to the polygonal shape, that is, the shape is limited to a combination of a plurality (three) of straight portions and a plurality of (three) curved portions. It may be a simple shape.

(Third embodiment)
Still another example of the static eliminator according to the present invention will be described with reference to the drawings. FIG. 10 is a schematic view showing an arrangement state of the ion generator of the static eliminator according to the present invention. The static eliminator determines the flow rate of the airflow according to the static elimination target. In the first embodiment and the second embodiment, the configuration includes three ion generators 21, and the cross-sectional shape is a hexagonal shape or a shape in which three straight lines are connected by a curved surface. When changing the flow rate of the airflow with such a cross-sectional shape, it is performed by changing the rotational speed of the fan or changing the cross-sectional area.

  If the number of rotations of the fan is changed, the flow velocity of the air flow changes, and the ion concentration becomes insufficient, or it becomes difficult to send the air flow far. Further, if the cross-sectional area is changed without changing the cross-sectional shape, it is necessary to change the interval between the discharge needles, the configuration of the ion generator must be changed, and the manufacturing cost increases.

  Therefore, in the present embodiment, the number of the ion generators 21 is adjusted and the arrangement of the ion generators 21 and the shape of the duct are adjusted when forming static eliminators with different flow rates. For example, when the flow rate of the ion generator 21 is sufficient with two ion generators 21 as shown in FIG. 10, the ion generator 21 is symmetric with respect to the central axis of the duct Dr1, and at the apexes of the four discharge needles. You may make it arrange | position so that the square of length L1 may be formed. By arranging in this way, the duct Ds having a cross-sectional shape that matches the flow rate and ion concentration of the airflow can be formed without changing the shape, that is, the distance L1 between the plus discharge needle 212 and the minus discharge needle 213. .

  Similarly, when a larger flow rate is required than when there are three ion generators 21, four ion generators 21 are arranged as shown in FIG. 11, and each discharge needle forms a regular octagon. The duct Ds2 is configured as described above. Thereby, it is possible to increase the flow rate of the air flow without changing the shape of the ion generator 21.

  In the static eliminator according to the present embodiment, the cross-sectional area of the duct can be changed without changing the shape of the ion generator 21, and an air flow having a good ion balance can be blown out from the blow-out port regardless of the flow rate. Note that the cross-sectional shape of the duct is such that regular polygonal discharge needles that are twice the number of ion generators 21 are arranged.

  A table in which the flow rate of the airflow and the cross-sectional shape (number of ion generators) are determined in advance may be prepared, and the cross-sectional shape and the number of ion generators may be determined according to the table. By doing in this way, the shape of a duct can be determined easily.

(Fourth embodiment)
Still another example of the static eliminator according to the present invention will be described with reference to the drawings. FIG. 12 is a front view showing an example of a louver used in the static eliminator according to the present invention. The static eliminator neutralizes the object by spraying ions, and the range of the charge removal varies depending on the object. In the static eliminator shown in FIG. 1 and the like, the airflow flows in the axial direction from the opening, and the airflow can be partially blown.

  On the other hand, if ions are to be sprayed over a wide range, the airflow irradiation range is narrow in the shape shown in FIG. 1 and the like, and thus it is necessary to move the static eliminator and spray ions. In this case, if the movement of the static eliminator is not stable, the amount (concentration) of ions to be sprayed may vary, and effective static elimination may be difficult.

  Therefore, a louver 7 as shown in FIG. 12 is used. The louver 7 includes a blowout portion 71 having a shape in which one end portion in the axial direction of the cylindrical shape is flattened in one direction orthogonal to the axis. Since the airflow flows along the inner surface of the blowing part 71, the airflow that spreads in the flat direction flows by forming the blowing part 71. As a result, it is possible to blow out an air flow in a wide range in one direction and supply ions to the wide range by being carried on the air flow.

  In addition, the outlet 3 of the static elimination apparatus A may be replaceable according to the size, shape, and ion concentration necessary for static elimination of the static elimination target body (static elimination target range). For example, when the static elimination range is narrow or when it is necessary to spray a high concentration of ions on the static elimination target, a louver 301 as shown in FIG. 1 or the like may be used. In addition, when the static elimination range is wide or when it is necessary to neutralize a large static elimination object uniformly or substantially uniformly, a louver 7 as shown in FIG. 12 may be used. By making the louver replaceable in this way, it is possible to perform static elimination according to a plurality of requests with a single static elimination device.

  In each of the above embodiments, an axial fan (propeller fan) is used as a fan. However, the present invention is not limited to this, and a centrifugal fan (for example, a sirocco fan) may be used. Good. In addition to these, fans that generate airflow can be widely used. Note that the stator may be omitted when a fan that does not swirl the airflow is used.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. The embodiments of the present invention can be variously modified without departing from the spirit of the invention.

  The static eliminator according to the present invention described above includes a plurality of ion generators including a duct, a blower that generates an airflow that flows in the axial direction inside the duct, and at least a pair of discharge needles that generate ions having different polarities. The ion generator is disposed in the duct so that at least the tip of the discharge needle protrudes into the duct, and the plurality of ion generators are spaced in the circumferential direction of the duct. It is arranged with a gap.

  In the static eliminator described above, the adjacent discharge needles generate ions of different polarities, and the tips of the discharge needles may be arranged at equal intervals in the circumferential direction.

  The static eliminator described above divides the inside of the duct in the circumferential direction into the same number of regions as the discharge needles and rectifies the airflow in the axial direction at a portion of the duct between the blower and the ion generator. A straightening member is provided, and each region divided by the straightening member may overlap with at least one discharge needle in the axial direction.

  In the static eliminator described above, the blower includes an axial flow propeller and an electric motor that rotationally drives the axial flow propeller, the electric motor is provided in the duct, and an outer peripheral surface of the electric motor is the You may oppose the front-end | tip of a discharge needle and the radial direction of the said duct.

  The static eliminator described above includes a cylindrical section having a circular cross section, and a mounting section that is integrally connected to the cylindrical section and in which the ion generator is disposed. You may have the some plane part which attaches each of a part, and the connection part which connects the said some plane part to the circumferential direction.

  In the static eliminator described above, the connecting portion may be a curved surface, and the center of curvature of the connecting portion may overlap the central axis of the duct.

  In the static eliminator described above, the cross-sectional area of the cross section perpendicular to the axis of the attachment portion is smaller than the cross-sectional area of the cross section perpendicular to the axis of the cylindrical portion, and the inclined surface becomes smaller from the cylindrical portion toward the attachment portion. May be formed.

  In the static eliminator described above, the attachment portion may be a polygon having sides that are twice the number of the ion generators.

  In the static eliminator described above, a discharge portion that is flattened in one direction perpendicular to the axis of the duct may be provided on the downstream side of the airflow from the discharge portion of the duct.

A Static eliminator 1 Blower 101 Blower case 102 Blower cover 103 Fan 104 Fan case 105 Stator 106 Motor 107 Filter cover 108 Suction port 110 Through hole 2 Ion generator 201 Unit case 202 Unit cover 203 Vent 204 204 Rib 205 Through hole 206 Rib 21 Ion generator 211 Case 212 Positive discharge needle 213 Negative discharge needle 3 Outlet 301 Louver 302 Grid 4 Stand 401 Standing leg 402 Hinge part 5 Substrate housing part 501 Case 502 Front cover 6 Ion detector

Claims (5)

Ducts,
A blower for generating an airflow flowing in the axial direction inside the duct;
A plurality of ion generators having at least a pair of discharge needles that generate ions of different polarities,
The ion generator is disposed in the duct so that at least the tip of the pair of discharge needles protrudes into the duct;
The static eliminator in which the plurality of ion generators are arranged at intervals in the circumferential direction of the duct. A portion of the duct between the blower and the ion generator is provided with a rectifying member that divides the inside of the duct into the same number of regions as the discharge needle in the circumferential direction and rectifies the airflow in the axial direction. And
The static eliminator according to claim 1, wherein each region divided by the rectifying member overlaps at least one of the discharge needles in the axial direction. The blower includes an axial flow propeller and an electric motor that rotationally drives the axial flow propeller.
The electric motor is provided inside the duct;
The static elimination apparatus of Claim 1 or Claim 2 with which the outer peripheral surface of the said motor opposes the front-end | tip of the said discharge needle in the radial direction of the said duct. The duct includes a cylindrical portion having a circular cross section, and an attachment portion that is integrally connected to the cylindrical portion and in which the ion generator is disposed,
The said attaching part has a several plane part which attaches each of the said discharge part, and the connection part which connects the said some planar part to the circumferential direction. Static neutralizer.   The cross-sectional area of the cross section perpendicular to the axis of the mounting portion is smaller than the cross-sectional area of the cross section perpendicular to the axis of the cylindrical portion, and an inclined surface that is smaller from the cylindrical portion toward the mounting portion is formed. Item 5. The static eliminator according to Item 4.

Images