TW201711527A - Destaticizing device - Google Patents

Abstract

A destaticizing A provided with 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 being 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 being positioned across gaps in the circumferential direction of the duct.

Description

Static elimination device

This case is based on Japanese Patent Application No. 2015-173544 filed on September 3, 2015.

The present invention relates to a static elimination device that utilizes ions generated by discharge of a discharge electrode to electrostatically cancel.

As a conventional static electricity eliminating device, there is a Japanese Patent No. 4410258. The static electricity eliminating device has a frame portion having a substantially octagonal front and rear opening inside the body of the box type, and a fan attached to the motor by a plurality of ribs inside the frame portion, and the frame portion is attached to the frame portion There are multiple alignments in the inner circumference. Negative needle discharge electrode. According to the static elimination device, the discharge due to the needle discharge electrode is positive. The negative ions are sent to the front by the air blown by the fan. By this, by positive. Negative ions eliminate static electricity.

However, in the case of the above-described conventional static electricity eliminating device, since the needle-shaped discharge electrode is provided in a frame portion which is implanted in an octagonal shape, there is a portion where the interval between the adjacent needle-shaped discharge electrodes is narrow. Since the blowing air of the fan is a spiral flow, it is easy to neutralize by contact of the negative ions with the positive ions in the narrow portion of the needle-shaped discharge electrodes. Thereby, the ion balance is deteriorated.

Further, the size of the frame body varies depending on the required air volume of the fan. Then, since the shape of the frame body is substantially octagonal, if the size of the frame body is changed The size of the edge also changes. Therefore, if it is necessary to adjust the position of the above-mentioned plural pair of needle-shaped discharge electrodes, it takes time and time to manufacture.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a static electricity eliminating device which can supply a gas stream containing positive ions and negative ions with a preferable balance by a simple configuration.

In order to achieve the above object, the present invention provides a static elimination device comprising: a duct; a blower generated in a gas flow axially flowing through the inside of the duct; and a plurality of ion generators having at least ions generating different polarities a pair of discharge needles; wherein the ion generator is disposed in the duct such that at least a tip end of the discharge needle protrudes into the duct, and the plurality of ion generators are disposed at intervals in a circumferential direction of the duct.

According to this configuration, since the ion generator is disposed in the circumferential direction of the pipe, the entire pipe can be distributed with ions.

In the above configuration, the adjacent discharge needles may be ions having different polarities, and the front ends of the discharge needles may be arranged at equal intervals in the circumferential direction. With this configuration, the balance of ions in the pipe (balance of concentration) can be improved.

In the above configuration, a portion between the air blower and the ion generator may be 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 The airflow is rectified in the axial direction, and each of the regions divided by the rectifying member overlaps with at least one of the discharge needles in the axial direction. According to this configuration, since the flow of the gas flowing toward the discharge needle is in the axial direction and the discharge needle is provided in each of the regions, it is difficult for the gas stream containing the ions generated by the discharge needle to collide with the ions contained in the gas flow flowing from the adjacent region. Thus ions are difficult to neutralize. Thereby, the decrease in the amount of ions blown to the outside can be suppressed. Moreover, since the spiral flow is rectified in the axial direction, ions can be sent further.

In the above configuration, the blower includes an axial flow propeller and the rotary drive An electric motor of an axial flow propeller, wherein the electric motor is disposed inside the duct, and an outer peripheral surface of the electric motor is disposed to face a radial direction of the duct at a front end of the discharge needle. In general, the central portion of the airflow ejection side of the axial flow propeller tends to flow in the opposite direction to generate a vortex. By arranging the motor in a portion where the vortex is likely to occur, generation of vortices can be suppressed. Thereby, it is possible to suppress the phenomenon in which ions trapped in the vortex disappear and are trapped in ions of different polarities of the vortex.

In the above configuration, the duct may have 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 includes each of the discharge portions a plurality of planar portions and a connecting portion connecting the plurality of planar portions in the circumferential direction.

In the above configuration, the connecting portion may be a curved surface, and a center of curvature of the connecting portion may coincide with a central axis of the duct.

In the above configuration, the cross-sectional area of the cross section perpendicular to the axis of the mounting portion may be smaller than the cross-sectional area of the cross section perpendicular to the axis of the cylindrical portion, and may be formed from the cylindrical portion toward the mounting portion. Small sloped surface.

In the above configuration, the mounting portion may be a polygon having a side twice the number of the ion generators.

In the above configuration, the discharge portion which is flat in one direction perpendicular to the axis of the duct may be provided on the downstream side of the air flow closer to the discharge portion of the duct. The spout can also be set to be detachable and can be replaced for use.

According to the present invention, it is possible to provide a static electricity eliminating device which delivers a gas stream containing positive ions and negative ions with a preferable balance in a simple configuration.

1‧‧‧Air blower

2‧‧‧Ion generator

3‧‧‧Blowing out

4‧‧‧ bracket

5‧‧‧Substrate housing department

6‧‧‧Ion detector

7‧‧‧ visor

21‧‧‧Ion generator

71‧‧‧Blowing out

101‧‧‧Air blower housing

102‧‧‧Air blower cover

103‧‧‧fan

104‧‧‧Fan housing

105‧‧‧ Stator

106‧‧‧Motor

107‧‧‧Filter cover

108‧‧‧Inhalation

110‧‧‧through holes

201‧‧‧ unit housing

202‧‧‧unit cover

203‧‧‧ vent

204‧‧‧ ribs

205‧‧‧through holes

206‧‧‧ ribs

211‧‧‧Shell

212‧‧‧positive discharge needle

213‧‧‧negative discharge needle

301‧‧‧ visor

302‧‧‧Grid

303‧‧‧through holes

401‧‧‧Foot

402‧‧‧Hinges

501‧‧‧shell

502‧‧‧ front cover

A‧‧‧Static elimination device

Bd‧‧‧ substrate

Dr1‧‧‧ pipeline

Ds‧‧‧ pipeline

Ds1‧‧‧Cylindrical pipe

Ds2‧‧‧Conical pipe

Dt‧‧‧ pipeline

Dt1‧‧ plane

Dt2‧‧‧ surface

L1‧‧‧ distance

Fig. 1 is a front view showing an example of a static elimination device including an ion generating apparatus of the present invention.

Figure 2 is a side view of the static elimination device shown in Figure 1.

Figure 3 is a cross-sectional view of the static elimination device shown in Figure 2.

Figure 4 is an exploded perspective view of the static elimination device shown in Figure 2.

Fig. 5 is a schematic view showing an example of an ion generator provided in the ion generating apparatus of the present invention.

Fig. 6 is a cross-sectional view showing a pipe for cutting the static eliminating device in a plane perpendicular to the axis.

Figure 7 is a cross-sectional view taken along the plane of the shaft of the pipe shown in Figure 6.

Fig. 8 is a view showing a pipe of another example of the static electricity eliminating device of the present invention in the axial direction.

Figure 9 is a cross-sectional view taken along the plane of the axis of the pipe shown in Figure 8.

Fig. 10 is a schematic view showing an arrangement state of an ion generator of the static electricity eliminating device of the invention.

Fig. 11 is a schematic view showing an arrangement state of an ion generator of the static electricity eliminating device of the present invention.

Fig. 12 is a front view showing an example of a shutter used in the static electricity eliminating device of the present invention.

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

1 is a front view showing an example of a static elimination device having a generation device of the present invention, FIG. 2 is a side view of the static elimination device shown in FIG. 1, and FIG. 3 is a cross-sectional view of the static elimination device shown in FIG. An exploded perspective view of the static elimination device shown in Fig. 2. As shown in FIGS. 1 and 2, the static electricity eliminating device A includes a blower 1, an ion generating device 2, an air outlet 3, a holder 4, and a substrate housing portion 5.

In FIG. 2, the right side is the back side, and the ion generator 2 is placed in contact with the front side of the blower 1, and the air outlet 3 is placed in contact with the front side of the ion generator 2. The blower 1, the ion generator 2, and the blower port 3 are fixed by a fastening tool such as a bolt. The blower 1, the ion generating device 2, and the air outlet 3 are combined in such a manner that the central axes are aligned to form an internal portion. A pipe Dt for supplying a gas flow in the axial direction. Further, inside the duct Dt, the air flow flows from the back side to the front side.

The blower 1 includes a blower casing 101, a blower cover 102, a fan 103, a fan casing 104, a stator 105 (rectifying member), a motor 106, and a filter cover 107. The blower casing 101 is a cylindrical bottomed casing, and has a suction port 108 for taking in air at a central portion of the bottom. A fan casing 104 is disposed inside the blower casing 101. The fan case 104 has a cylindrical shape and functions as a guide for the air flow (a part of the pipe Dt).

Inside the fan housing 104, the fan 103 is arranged to be rotatable about a central axis. The fan 103 is an axial fan (here, a propeller fan), and by rotating the fan 103, an air flow flowing in the axial direction can be generated. The airflow generated by the fan 103 is a spiral airflow having a circumferential velocity component and an axial velocity component. By rotating the fan 103 inside the cylindrical fan casing 104, the airflow is suppressed from being dispersed radially outward.

On the downstream side of the flow of the airflow of the fan casing 104, a stator 105 having a plurality of (here, six) curved surfaces opposite to the blades of the fan 103 is provided. The plurality of stators 105 are arranged at a fixed interval in the axial direction. On the downstream side of the fan casing 104, by providing the stator 105 twisted in the opposite direction to the airflow, the circumferential velocity component of the spiral airflow can be rectified into an axial velocity component. In addition, the stator 105 may have a blade shape or a flat member. Here, the fan case 104 and the stator 105 are integrally formed, but the stator 105 may be mounted 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 casing 104 so as to protrude outward from the stator 105. Then, the driving of the motor 106 protrudes from the inside of the fan casing 104, and the fan 103 is fixed to the drive shaft. The fan 103 fixed to the drive shaft can be rotated by rotating the drive shaft of the motor 106. As shown in FIGS. 3 and 4, the plurality of stators 105 also function as supporting members for arranging the motor 106 in the central portion of the fan casing 104.

The fan casing 104 to which the fan 103 and the motor 106 are attached is such 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, and is attached and fixed to the blower casing 101. Further, the centers of the fan 103 and the motor 106 coincide with the center of the blower casing 101. Further, the fan case 104 is disposed to surround the suction port 108 of the blower case 101. The airflow is generated by the rotation of the fan 103, whereby the air sucked in from the suction port 108 flows into the fan casing 104 without waste.

The blower casing 102 is disposed to cover the opening on the front side of the blower casing 101. The blower cover 102 is bolted to the blower casing 101 together with the fan casing 104. The fan case 104 is fixed to the inside of 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 a central portion thereof, and the airflow 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 conforming to the arrangement state of the discharge unit 203 described later in the ion generating apparatus 2. That is, a plurality of straight line portions arranged at equal intervals of the center angle are connected in a curved shape. The plurality of straight portions have their normals orthogonal to the central axis. The curved surface connects the adjacent straight portions to each other, and when viewed from the central axis direction, it becomes an arc centered on the central axis. Further, when the blower cover 102 is attached to the blower casing 101, the main portion of the motor 106 penetrates through the through hole 110.

The blower 1 has the above configuration, and by controlling the motor 106 to rotate the fan 103, an axial airflow is generated, and an air flow from the through hole 110 of the blower cover 102 toward the axial direction is generated. Further, a filter (not shown) is disposed on the back side of the blower casing 101, and the filter is held by the filter cover 107. That is, the outside of the suction port 108 is covered by the filter, and when air is taken in from the suction port 108, foreign matter such as dust is collected by the filter. Thereby, it is possible to suppress the foreign matter from being sucked into the inside of the air blowing device 1.

Next, the ion generating device 2 will be described. The ion generating apparatus 2 includes a unit casing 201, a unit cover 202, a plurality of (here, three) ion generators 21, and an ion detector 6. The unit housing 201 has a bottomed cylindrical shape and is provided with a blower cover on the bottom surface portion. The through hole 110 of the 102 has the same shape of the vent 203. At the edge of the vent 203, the rib 204 of the ion generator 21 is held to protrude in the axial direction. The rib 204 holds the ion generator 21 and constitutes a part of the duct Dt that prevents leakage of the airflow blown from the through hole 110 of the blower cover 102.

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 provided in the ion generating apparatus of the present invention. The ion generator 21 includes a housing 211, a positive discharge needle 212, and a negative discharge needle 213. Further, a drive circuit (not shown) for causing the positive discharge needle 212 and the negative discharge needle 213 to discharge is provided inside the casing 211. Further, the drive circuit is provided with a step-up transformer for applying a large voltage between the positive discharge needle 212 and the negative discharge needle 213. Positive ions and negative ions are generated by discharging by the positive discharge needle 212 and the negative discharge needle 213, respectively.

The ion generator 21 is disposed such that the positive discharge needle 212 and the negative discharge needle 213 are separated from one side of the side surface of the casing 211 by a distance L1. The ion generator 21 is disposed in the unit such that the positive discharge needle 212 and the negative discharge needle 213 are disposed in the duct Dt, that is, the positive discharge needle 212 and the negative discharge needle 213 and the vent port 203 are superposed on each other. The rib 204 of the cover 202. Further, in the ion generating apparatus 2 used in the static electricity eliminating device A of the present embodiment, the three ion generators 21 are arranged in the circumferential direction of the duct Dt at an isocenter angle (here, 120°).

Further, in the rib 204 of the unit casing 201, three ion generators 21 are disposed so that the positive discharge needle 212 and the negative discharge needle 213 protrude toward the inside of the duct Dt, and the unit cover 202 is attached. The fixing unit housing 201 and the unit cover 202 are fixed by bolts or the like, whereby the ion generator 21 is held without being offset. In addition, the details of the configuration of the ion generator 21 will be described later.

A circular through hole 205 is provided in a central portion of the unit cover 202, and a cylindrical rib 206 that protrudes further downstream in the radial direction than an edge portion of the through hole 205 is provided. rib The portion 206 is a member that constitutes a part of the pipe Dt. The air flow blown from the through hole 110 of the blower cover 102 is flowed in a portion of the pipe Dt formed in the inside of the ion generating device 2 in the axial direction. Further, the opening on the downstream side of the rib 206 of the unit cover 202 is blown to the outside. Further, 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. Further, positive ions and negative ions are blown out together with the air current to the outside by generating positive ions and negative ions inside the pipe Dt.

An air outlet 3 is provided on the downstream side of the unit cover 202 of the ion generating apparatus 2. The air outlet 3 is provided with a shutter 301 and a grating 302. The grid 302 is, for example, a mesh-like member, and is a member for preventing the user's fingers from entering the safety-preventing member from the air outlet 3. The shutter 301 is attached to the downstream of the unit cover 202 and has a through hole 303 having an inner diameter equal to that of the rib 206. Further, the airflow is blown toward the front side from the through hole 303 of the shutter 301. Therefore, the shutter 301 is a member for adjusting the direction in which the airflow is blown out. also. It is also a pressing member for pressing the grid 302.

The substrate housing portion 5 includes a rectangular parallelepiped casing 501 integrally formed in a lower portion of the blower casing 101, and a front cover 502 provided on a lower portion of the blower cover 102. Moreover, the front cover 502 covers the front surface of the casing 501 by the blower cover 101 being attached to the blower casing 101. A substrate Bd is provided inside the substrate housing portion 5, and the substrate Bd includes a control circuit that controls the rotation of the fan 103 of the blower 1 and controls the discharge of the ion generator 21 of the ion generating device 2.

Further, the front cover 502 is provided with an operation portion for receiving an operation of the user. The operation unit has, for example, a configuration including a push button that can perform physical operation input. Further, the operation unit is connected to the substrate Bd, and when the operation unit is operated, the operation is transmitted 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.

Further, in the present embodiment, the substrate accommodating portion 5 is formed integrally with the air blower 1, but may be formed separately and combined. Moreover, the configuration in which the substrate Bd is housed inside the blower 1 may be provided, and the substrate housing portion 5 may be omitted.

Further, the holder 4 pivotally supports the housing 501 of the substrate housing portion 5. The bracket 4 includes a leg portion 401 and a hinge portion 402 that are arranged in parallel. The static electricity eliminating device A supports the casing 501 of the substrate housing portion 5 so as to rotate in the front-rear direction. Moreover, it has a configuration that can be stopped at an angle desired by the user. As such a configuration, for example, a bearing having a large friction like a rubber bushing can be attached and fixed to an arbitrary position, or a bolt can be fixed at an angle.

In the static electricity eliminating device A configured as described above, the positive discharge needle 212 and the negative discharge needle 213 of the ion generator 21 are discharged, and the pipe formed by the fan 103 and the ion generating device 2 is driven by driving the fan 103. The positive ions and negative ions generated inside the Dt are released to the outside with the gas flow.

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. Fig. 6 is a cross-sectional view showing a pipe for cutting the static eliminating device in a plane perpendicular to the axis. Figure 7 is a cross-sectional view taken along the plane of the axis of the pipe shown in Figure 6. Further, a portion of the pipe Dt-type pipe shown in Figs. 6 and 7 is a pipe Dt constituted by a fan casing 104 and a rib 204 which holds the ion generator of the ion generating device 2.

As shown in FIG. 6, the static electricity eliminating device A is disposed such that the positive discharge needle 212 and the negative discharge needle 213 protrude toward the inside of the pipe Dt (here, the rib 204 of the unit casing 201). The inner surface of the pipe Dt forms a portion in which the three ion generators 21 are arranged by the plane Dt1, and connects the adjacent plane Dt1 with the curved surface Dt2.

Further, the three ion generators 21 are arranged around the central axis of the pipe Dt at an angle of 120°. The three ion generators 21 are arranged in such a manner that adjacent discharge pins have different polarities. That is, the positive discharge needle 212 and the negative discharge needle 213 of each ion generator 21 are in the same parallel manner in the circumferential direction. Further, the positive discharge needle 212 and the negative discharge needle 213 of the ion generator 21 are spaced apart from each other by an interval L1, and the positive discharge needle 212 and the negative discharge needle 213 of the adjacent ion generator 21 are also arranged at an interval L1.

By arranging the ion generator 21 in this way, the electromagnetic attractive force of the positive discharge needle 212 and the negative discharge needle 213 of each ion generator 21, and the positive discharge needle 212 of the adjacent ion generator 21 or The relationship of the electromagnetic attractive force of the negative discharge needle 213 becomes equal, and the unevenness of the amount (concentration) of the positive ions and the negative ions is reduced inside the pipe Dt, that is, the positive ions and the negative ions can be preferably balanced.

Further, on the upstream side of the ion generator 21 of the pipe Dt, the six stators 105 having the torsion faces in the opposite direction to the torsion of the airflow generated by the rotation of the fan 103 are arranged in parallel at equal intervals in the circumferential direction. The airflow generated by the rotation of the fan 103 is rectified by the stator 105 into a gas flow flowing in the axial direction. Then, as shown in FIG. 6, the duct Dt is divided by the stator 105 in the circumferential direction or the like. The end of the duct Dt side of each stator 105 is disposed at a position separating the positive discharge needle 212 and the negative discharge needle 213 of the ion generator 21. The equally divided region is disposed so as to overlap one of the positive discharge needle 212 or the negative discharge needle 213 of each ion generator 21 in the axial direction.

The positive discharge needle 212 or the negative discharge needle 213 is disposed at a position overlapping the axial direction of each region by the space divided by the stator 105 through the duct Dt. Thereby, even if adjacent discharge needles generate ions of opposite polarities, it is possible to make ions of opposite polarities difficult to mix by the gas flow, thereby suppressing ion erasing due to ion neutralization, and allowing ions to be blown to the outside. The amount has increased.

Further, as shown in Fig. 7, the positive discharge needle 212 and the negative discharge needle 213 of the ion generator 21 are disposed at positions where the motor 106 overlaps the axial direction of the pipe Dt. In other words, the motor 106 is disposed to face the direction (radial direction) in which the positive discharge needle 212 and the negative discharge needle 213 of the ion generator 21 intersect the axis of the pipe Dt. The motor 106 is disposed on the downstream side of the airflow generated by the fan 103 and is the further downstream side of the stator 105.

In the vicinity of the side of the jet air of the propeller fan, the flow of air in the opposite direction to the airflow sent by the self-rotating fan around the central axis is generated. In other words, in a region around the central axis on the downstream side of the propeller fan, vortex or the like is likely to occur. When a gas stream containing ions flows in this region, positive ions and negative ions are mixed and neutralized to reduce the amount of ions. Therefore, by the center of the pipe Dt near the downstream of the fan 103 The motor 106 is partially disposed to suppress the generation of airflow in the opposite direction. Thereby, generation of vortices can be suppressed, and reduction of ions blown out to the outside of the static electricity eliminating device A can be suppressed.

As described above, in the static electricity eliminating device A of the present invention, the positive discharge needle 212 and the negative discharge needle 213 are alternately arranged at equal intervals in the circumferential direction of the pipe Dt, so that the positive ions and negative ions in the pipe can be suppressed from being biased. Uneven.

Further, since the airflow of the spiral flow generated by the fan 103 is corrected by the stator 105 to the airflow flowing in the axial direction, the airflow is not easily mixed. Further, the duct Dt is divided into six equal parts by the stator 105, and one positive discharge needle 212 or negative discharge needle 213 is provided on the downstream side of each area. Since the region which is divided by the stator 105 flows out of the axially flowing airflow, even if the positive discharge needle 212 and the negative discharge needle 213 are disposed adjacent to each other, the gas stream containing the positive ions and the gas stream containing the negative ions are difficult to be mixed, so that the ions are not easily neutralized. .

Further, by using the stator 105 to convert the circumferential velocity component of the airflow into the axial direction, the force transmitted in the axial direction can be increased. According to the above, in the static electricity eliminating device A of the present invention, the unevenness of the positive ions and the negative ions can be reduced, and (the ions are difficult to neutralize), the gas having a high ion concentration can be blown to a distant place.

Further, the ion generator 21 is described as an example in which a pair of positive discharge needles 212 and negative discharge needles 213 are provided. However, the present invention is not limited thereto, and a plurality of pairs of positive discharge needles 212 and negative discharge needles 213 may be provided. In this case, the discharge needles arranged so as to overlap with the area divided by the stator 105 are plural. Further, by setting all of the number of discharge pins that overlap with the region divided by the stator 105 to the same number, it is possible to suppress uneven bias of ions, which is preferable.

(Second embodiment)

Other examples of the static electricity eliminating device of the present invention will be described with reference to the drawings. Fig. 8 is a view showing a pipe of another example of the static electricity eliminating device of the present invention in the axial direction, and Fig. 9 is a cross-sectional view taken along the plane of the axis of the pipe shown in Fig. 8. The static electricity eliminating device of the present embodiment is different from the static eliminating device of the first embodiment except that the shape of the pipe Ds is different. A is the same, and a detailed description of substantially the same portions 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 which is formed on the downstream side and which is formed to have a narrowed cross-sectional area as it goes downstream. Further, the cylindrical duct Ds1 and the tapered duct Ds2 are integrally formed in such a manner that the inner surface is continuous. Further, the tapered pipe Ds2 has an annular cross section at a portion joined to the cylindrical pipe Ds1, and is deformed (reduced) toward the front end at a specific distance so as to gradually have a hexagonal cross section.

By gradually changing the shape from the cylindrical shape to the hexagonal shape, when the ion generator 21 is provided in a hexagonal shape, the portion which is caused by the air path of the ion generator 21 can be reduced. Thereby, the disturbance of the airflow can be suppressed, and the airflow with less uneven bias and high ion concentration (containing a large amount of ions) can be efficiently released to the outside.

Further, in the present embodiment, since the three ion generators 21 are provided, they are reduced in a hexagonal shape, but the reduced shape may be changed depending on the number of the ion generators 21. Further, the shape of the through hole 110 or the vent hole 203 of the first embodiment, that is, the shape of the combination of the plurality of (three) straight portions and the plurality of (three) curved portions may be reduced in a polygonal shape. The shape.

(Third embodiment)

Still other examples of the static electricity eliminating device of the present invention will be described with reference to the drawings. Fig. 10 is a schematic view showing an arrangement state of an ion generator of the static electricity eliminating device of the present invention. The static electricity eliminating device determines the flow rate of the airflow based on the static elimination target. In the first embodiment and the second embodiment, the three ion generators 21 are provided, and the cross-sectional shape has a hexagonal shape or a curved line connecting three straight lines. When the flow rate of the airflow is changed by the cross-sectional shape, the flow rate is changed by changing the number of rotations of the fan or changing the sectional area.

When the number of rotations of the fan is changed, the flow rate of the airflow changes, the concentration of the ions becomes insufficient, or it becomes difficult to feed the airflow to a distant place. Also, if you do not change the shape of the section, it will change. In the case of a larger cross-sectional area, it is necessary to change the interval between the discharge needles, and it is necessary to change the configuration of the ion generator, and the manufacturing cost becomes high.

On the other hand, in the present embodiment, when the static electricity eliminating device having a different flow rate is formed, the number of the ion generators 21 is adjusted, and the arrangement of the ion generator 21 and the shape of the pipe are adjusted. For example, when the airflow is two in the ion generator 21 and the flow rate is sufficient, as shown in FIG. 10, the ion generator 21 may be symmetric with respect to the central axis of the pipe Dr1, and four discharge needles may be used. The vertices are arranged in such a manner as to form a square of length L1. With this configuration, the pipe Ds having a cross-sectional shape corresponding to the flow rate of the gas flow and the ion concentration can be formed without changing the shape, that is, the distance L1 between the positive discharge needle 212 and the negative discharge needle 213.

Further, in the case where a flow rate of more than three ion generators 21 is required, four ion generators 21 are arranged as shown in FIG. 1, and the pipe Ds2 is formed in such a manner that each discharge needle forms a regular octagon. . Thereby, the flow rate of the airflow can be increased without changing the shape of the ion generator 21.

In the static electricity eliminating device of the present embodiment, the cross-sectional area of the pipe can be changed without changing the shape of the ion generator 21, and the gas flow having good ion balance can be blown from the air outlet regardless of the flow rate. Further, the cross-sectional shape of the duct is a regular polygonal discharge needle for arranging the number of the ion generators 21 twice.

Further, a table in which the flow rate and the cross-sectional shape (the number of ion generators) of the airflow are predetermined may be prepared in advance, and the cross-sectional shape and the number of ion generators may be determined based on the table. With this arrangement, the shape of the pipe can be easily determined.

(Fourth embodiment)

Still other examples of the static electricity eliminating device of the present invention will be described with reference to the drawings. Fig. 12 is a front view showing an example of a shutter used in the static electricity eliminating device of the present invention. The static electricity eliminating device is a device that electrostatically cancels a target body by blowing ions, and the range of static elimination is changed depending on the target body. In the static electricity eliminating device shown in Fig. 1 and the like, the air flow is partially blown from the opening in the axial direction.

On the other hand, if the ions are blown over a wide range, since the irradiation range of the airflow in the shape shown in Fig. 1 or the like is narrow, it is necessary to move the static elimination device to blow the ions. In this case, if the movement of the static elimination device is unstable, the amount (concentration) of the ion to be blown may be uneven, and it may be difficult to effectively eliminate static electricity.

Therefore, the shutter 7 shown in Fig. 12 is used. In the shutter 7, the end portion on one side in the axial direction of the cylindrical shape is provided with a blowing portion 71 which is flat in one direction orthogonal to the axis. Since the airflow flows along the inner surface of the blowing portion 71, the airflow extending in the flat direction can be flown by forming the blowing portion 71. Thereby, the gas flow can be blown out in a wide range in one direction, and ions can be supplied to a wider range with the gas flow, and static electricity can be eliminated in a wider or substantially equal range.

Further, the air outlet 3 of the static electricity eliminating device A may be replaced by the size and shape of the static electricity eliminating target (the static elimination target range) and the concentration of the ions to be electrostatically removed. For example, when the static elimination range is narrow or when it is necessary to blow a high concentration of ions to the static elimination target, the shutter 301 shown in Fig. 1 or the like can be used. Further, in the case where the static elimination range is wide or when it is necessary to uniformly or substantially uniformly remove static electricity from the large static electricity eliminating target body, the shutter 7 as shown in Fig. 12 can be used. Thus, by setting the shutter to be replaceable, one static elimination device can perform static elimination in response to a plurality of requirements.

Further, in each of the above-described embodiments, the axial fan (propeller fan) is used as the fan. However, the present invention is not limited thereto, and a centrifugal fan (for example, a multi-blade fan) may be used. Further, in addition to these, a fan that generates an air flow can be widely used. In addition, in the case of using a fan in which the airflow does not swirl, the stator may be omitted.

Although the embodiments of the present invention have been described above, the present invention is not limited to the contents. Further, various modifications can be made without departing from the spirit and scope of the invention.

The static electricity eliminating device of the present invention described above includes: a duct; a blower, which is produced a gas stream generated in the axial direction through the inside of the pipe; and a plurality of ion generators having at least one pair of discharge needles that generate ions having different polarities; and the ion generator is configured to pass at least the front end of the discharge needle to the pipe The inner protruding portion is disposed in the duct, and the plurality of ion generators are disposed at intervals in the circumferential direction of the duct.

In the above-described static electricity eliminating device, the adjacent discharge needles may generate ions of different polarities, and the front ends of the discharge needles may be arranged at equal intervals in the circumferential direction.

In the above-described static electricity eliminating device, a portion between the air blower and the ion generator of the duct may be provided with a rectifying member that divides the inside of the duct into the same number of areas as the discharge needle in the circumferential direction. And the airflow is rectified in the axial direction, and each of the regions divided by the rectifying member overlaps with at least one of the discharge needles in the axial direction.

In the above-described static electricity eliminating device, the air blower may include an axial flow propeller and a motor that rotationally drives the axial flow propeller, and the electric motor is disposed inside the duct, and the outer peripheral surface of the electric motor and the front end of the discharge needle Radially opposite to the above pipes.

In the static electricity eliminating device described above, the duct may include a cylindrical portion having a circular cross section, and a mounting portion integrally connected to the cylindrical portion to be disposed with the ion generator, and the mounting portion may have the discharge portion mounted thereon a plurality of planar portions of each of the plurality of planar portions and a connecting portion connecting the plurality of planar portions in the circumferential direction.

In the static electricity eliminating device described above, the connecting portion may be a curved surface, and a center of curvature of the connecting portion may coincide with a central axis of the duct.

In the above-described static electricity eliminating device, the cross-sectional area perpendicular to the axis of the mounting portion may be smaller than the cross-sectional area of the cross section perpendicular to the axis of the cylindrical portion, and may be formed from the cylindrical portion toward the mounting portion. Small sloped surface.

In the above-described static electricity eliminating device, the mounting portion may have a polygonal shape that is twice as large as the number of the ion generators.

In the static electricity eliminating device described above, a discharge portion that is flat in one direction perpendicular to the axis of the duct may be provided on the downstream side of the airflow of the discharge portion of the duct.

21‧‧‧Ion generator

105‧‧‧ Stator

106‧‧‧Motor

212‧‧‧positive discharge needle

213‧‧‧negative discharge needle

Dt‧‧‧ pipeline

Dt1‧‧ plane

Dt2‧‧‧ surface

L1‧‧‧ distance

Claims (7)

A static elimination device comprising: a duct; a blower generated in a gas flow axially flowing through the inside of the duct; and a plurality of ion generators having at least one pair of discharge needles generating ions of different polarities; and the ions The generator is disposed in the duct such that at least a front end of the pair of discharge needles protrudes into the inside of the duct, and the plurality of ion generators are disposed at intervals in a circumferential direction of the duct. The static elimination device of claim 1, wherein a portion between the air blower and the ion generator of the duct is provided with a rectifying member that divides an inner portion of the duct into a same area as the discharge needle in a circumferential direction. And the airflow is rectified in the axial direction, and each of the regions divided by the rectifying member overlaps with at least one of the discharge needles in the axial direction. The static elimination device according to claim 1 or 2, wherein the blower includes an axial flow propeller and an electric motor that rotationally drives the axial flow propeller, and the electric motor is disposed inside the duct, and the outer peripheral surface of the electric motor and the discharge needle are The front end is opposite to the radial direction of the above pipe. The static elimination device according to claim 1 or 2, wherein the duct has a cylindrical portion having a circular cross section, and a mounting portion integrally connected to the cylindrical portion and disposed with the ion generator, and the mounting portion has the mounting portion a plurality of planar portions of each of the discharge portions and a connecting portion connecting the plurality of the planar portions in the circumferential direction. The static electricity eliminating device according to claim 3, wherein the duct has a cylindrical portion having a circular cross section, and a mounting portion integrally connected to the cylindrical portion and disposed with the ion generator, and the mounting portion has the discharge portion mounted thereon A plurality of planar portions of each of the plurality of planar portions and a connecting portion connecting the plurality of planar portions in the circumferential direction. The static elimination device according to claim 4, wherein a cross-sectional area of a cross section perpendicular to an axis of the mounting portion is smaller than a cross-sectional area of a cross section perpendicular to an axis of the cylindrical portion, and is formed from the cylindrical portion toward the above The inclined surface of the mounting portion becomes smaller. The static elimination device according to claim 5, wherein a cross-sectional area of a cross section perpendicular to an axis of the mounting portion is smaller than a cross-sectional area of a cross section perpendicular to an axis of the cylindrical portion, and is formed from the cylindrical portion toward the above The inclined surface of the mounting portion becomes smaller.