JP2014107094A - Ion generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an ion generator compact.SOLUTION: An ion generator includes a duct 20 extending in the blowing direction, a needle-like first discharge electrode 160 projecting from the inner wall of the duct 20 and being applied with a negative voltage, and a needle-like second discharge electrode 170 projecting from the inner wall of the duct 20, at an interval for the first discharge electrode 160, in a direction orthogonal to the blowing direction and being applied with a positive voltage. Furthermore, an induction electrode 180 is arranged at a position between the projection position of the first discharge electrode 160, and the projection position of the second discharge electrode 170 in the inner wall of the duct 20, and located while being deviated from a straight line connecting the pointed ends of the first and second discharge electrodes 160, 170.

Description

  The present invention relates to an ion generator, and more particularly to an ion generator having a pair of needle-like discharge electrodes.

  As a prior document disclosing the configuration of the ion generator, there is JP 2010-40173 A (Patent Document 1). The ion generator described in Patent Document 1 includes a discharge electrode and an induction electrode. The discharge electrode has a needle-like tip. The induction electrode has a circular through hole. The tip of the discharge electrode penetrates the through hole of the induction electrode and protrudes above the upper surface of the induction electrode.

JP 2010-40173 A

  Ion generators are required to improve ion generation efficiency, durability, and miniaturization.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an ion generator capable of improving ion generation efficiency, durability, and downsizing.

  An ion generator according to the present invention includes a duct extending in a blowing direction, a needle-like first discharge electrode that protrudes from an inner wall of the duct and is applied with a negative voltage, and a first in a direction orthogonal to the blowing direction. A needle-like second discharge electrode that protrudes from the inner wall of the duct at a distance from the discharge electrode and is applied with a positive voltage. The ion generator is disposed at a position between the protruding position of the first discharge electrode and the protruding position of the second discharge electrode on the inner wall of the duct, and the tip of the first discharge electrode and the tip of the second discharge electrode And an induction electrode located on a straight line connecting the two.

  In one form of the present invention, the first discharge electrode protrudes from the inner wall on one side of the duct. The second discharge electrode protrudes from the inner wall on the other side opposite to the one side of the duct so as to face the first discharge electrode. The induction electrode is arranged on an intermediate inner wall connecting the inner wall on one side and the inner wall on the other side of the duct.

  In one form of this invention, each of the 1st discharge electrode and the 2nd discharge electrode protrudes from the inner wall of the one side of a duct so that it may rank in parallel mutually. The induction electrode is disposed on the inner wall on one side of the duct.

  In one form of the present invention, the induction electrode is disposed at a position where the distance from the first discharge electrode and the distance from the second discharge electrode are substantially the same.

  In one form of this invention, the duct is divided | segmented into the 1st discharge electrode side and the 2nd discharge electrode side.

  In one form of the invention, the duct has an opening in the peripheral wall. The first discharge electrode, the second discharge electrode, and the induction electrode are provided in an ion generator that can be attached to and detached from the opening. The ion generator includes a case that engages with the opening and forms an inner wall of the duct. The case includes a first case portion in which the first discharge electrode protrudes and engages with the inner wall on one side, and a second case portion in which the second discharge electrode protrudes and engages with the inner wall on the other side. The first discharge electrode and the second discharge electrode are located in a region sandwiched between the first case portion and the second case portion.

  According to the present invention, it is possible to improve ion generation efficiency, durability, and downsizing in an ion generator.

It is a top view which shows the structure of the ion generator contained in the ion generator which concerns on Embodiment 1 of this invention. It is the figure which looked at the ion generator of FIG. 1 from the arrow II direction. It is the figure which looked at the ion generator of FIG. 1 from the arrow III direction. It is a top view which shows the structure of the ion generator which concerns on the same embodiment. It is a top view which shows the structure of the ion generator which concerns on the 1st modification of the embodiment. It is a top view which shows the structure of the ion generator which concerns on the 2nd modification of the embodiment. It is a top view which shows the structure of the ion generator contained in the ion generator which concerns on Embodiment 2 of this invention. It is the figure which looked at the ion generator of FIG. 7 from the arrow VIII direction. It is a top view which shows the structure of the ion generator which concerns on the same embodiment. It is a top view which shows the structure of the ion generator which concerns on Embodiment 3 of this invention. It is a top view which shows the structure of the ion generator which concerns on the 1st modification of the embodiment. It is a top view which shows the structure of the ion generator contained in the ion generator which concerns on the 2nd modification of the embodiment. It is a top view which shows the structure of the ion generator which concerns on the 2nd modification of the embodiment.

  Hereinafter, an ion generator according to Embodiment 1 of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a plan view showing a configuration of an ion generator included in an ion generator according to Embodiment 1 of the present invention. FIG. 2 is a view of the ion generator of FIG. 1 as viewed from the direction of arrow II. FIG. 3 is a view of the ion generator of FIG. 1 as viewed from the direction of arrow III.

  As shown in FIGS. 1-3, the ion generator 100 contained in the ion generator which concerns on Embodiment 1 of this invention is the board | substrate 10, the acicular 1st discharge electrode 160, and the acicular 2nd discharge electrode. 170, a flat induction electrode 180, and a case.

  A transformer and a transformer drive circuit (not shown) are mounted on the substrate 10. The transformer is driven by a transformer driving circuit to boost the voltage. The substrate 10 is provided with external connection terminals. The external connection terminal is a terminal to which power and various signals are supplied from the outside.

  The first discharge electrode 160 is electrically connected to the substrate 10 by a connection conductor (not shown), and discharges when negative voltage boosted by a transformer is applied to generate negative ions.

  The second discharge electrode 170 is electrically connected to the substrate 10 by a connection conductor (not shown), and discharges when positive voltage boosted by a transformer is applied to generate positive ions.

  Each of the first discharge electrode 160 and the second discharge electrode 170 has a sharp needle shape. However, the shape of the first discharge electrode 160 and the second discharge electrode 170 is not limited to this, and may be an ultra-thin line having a linearity of 0.3 mm or less. Alternatively, the first discharge electrode 160 and the second discharge electrode 170 may be formed into a square pyramid shape by punching out from a metal thin plate by pressing to form an outer shape in plan view and plastically deforming only the tip portion by pressing again. It may be formed into a pointed shape.

  The induction electrode 180 is electrically connected to the substrate 10 by a connection conductor (not shown) to form a reference potential. The reference potential is, for example, a grounded zero potential.

  The shape of the induction electrode 180 is a rectangular shape in plan view. However, the shape of the induction electrode 180 is not limited to this, and may be an ultrathin wire having a linearity of less than or equal to several millimeters. Alternatively, the induction electrode 180 is formed into a quadrangular pyramid shape by punching from a thin metal plate by pressing to form an outline in plan view and plastically deforming only the apex portion by pressing again. But you can. Furthermore, the induction electrode 180 may be formed on the substrate 10 by pattern printing or the like. The material of the induction electrode 180 is a metal.

  The case includes a main body case portion 110 that accommodates the substrate 10, a first case portion 120 from which the first discharge electrode 160 protrudes, and a second case portion 130 from which the second discharge electrode 170 protrudes.

  The main body case part 110 includes a central part having a rectangular shape in plan view and an arm part extending left and right from the central part. The first case portion 120 is connected to the left arm portion of the main body case portion 110 and extends so as to be orthogonal to the left arm portion in plan view. The second case portion 130 is connected to the right arm portion of the main body case portion 110 and extends so as to be orthogonal to the right arm portion in plan view. The first case part 120 and the second case part 130 face each other.

  The case includes a container member that accommodates the substrate 10 and the like, and a flat lid member that engages with the container member. In the present embodiment, the container member and the lid member are formed by resin injection molding.

  As shown in FIGS. 2 and 3, the container member has a convex portion 112 protruding outward in order to accommodate the transformer inside. As shown in FIG. 1, the lid member has a hole 111 at a position covering the external connection terminal.

  In the present embodiment, the first discharge electrode 160 and the second discharge electrode 170 are opposed to each other with a space therebetween. Further, the first discharge electrode 160 and the second discharge electrode 170 are located in a region 101 sandwiched between the first case portion 120 and the second case portion 130.

Hereinafter, the ion generator according to the present embodiment will be described.
FIG. 4 is a plan view showing the configuration of the ion generator according to the present embodiment. As shown in FIG. 4, the ion generator according to the present embodiment is configured by inserting the ion generator 100 in the direction indicated by the arrow 1 and attaching it to the duct 20.

  The ion generator includes a blower (not shown). The duct 20 extends in the blowing direction by the blower. In FIG. 4, the depth direction of the paper surface is the blowing direction. In the present embodiment, the duct 20 has a rectangular outer shape in plan view, but the shape of the duct 20 in plan view is not limited thereto, and may be circular or elliptical.

  The duct 20 has an opening (not shown) on the peripheral wall. The ion generator 100 is detachably attached to the opening. The case of the ion generator 100 is engaged with the opening of the duct 20 to form the inner wall of the duct 20. That is, the opening of the duct 20 is closed by the case of the ion generator 100.

  In the present embodiment, the first case portion 120 engages with the inner wall on one side of the duct 20. The second case portion 130 engages with the inner wall on the other side opposite to the one side of the duct 20. Accordingly, the first discharge electrode 160 protrudes from the inner wall on one side of the duct 20. The second discharge electrode 170 protrudes from the inner wall of the duct 20 so as to face the first discharge electrode 160 at a distance from the first discharge electrode 160 in a direction orthogonal to the blowing direction.

  The induction electrode 180 is arranged on an intermediate inner wall connecting the inner wall on one side and the inner wall on the other side in the duct 20. As a result, the induction electrode 180 is disposed at a position between the protruding position of the first discharge electrode 160 and the protruding position of the second discharge electrode 170 on the inner wall of the duct 20. The position is shifted from the straight line connecting the tip of the discharge electrode 170.

  In the present embodiment, the induction electrode 180 is disposed at a position where the distance between the first discharge electrode 160 and the induction electrode 180 and the distance between the second discharge electrode 170 and the induction electrode 180 are substantially equal. Has been. However, the position of the induction electrode 180 is not limited to this, and the distance between the first discharge electrode 160 and the induction electrode 180 and the distance between the second discharge electrode 170 and the induction electrode 180 are induced at different positions. An electrode 180 may be disposed.

  By applying a negative voltage to the first discharge electrode 160 and a positive voltage to the second discharge electrode 170, as shown by a two-dot chain line in FIG. The electric field 2, the electric field 3 between the first discharge electrode 160 and the induction electrode 180, and the electric field 4 between the second discharge electrode 170 and the induction electrode 180 are generated. In addition, said electric field has shown a part of electric field which generate | occur | produces.

  In order to efficiently release ions in the ion generator, the ratio of the negative ions generated at the first discharge electrode 160 and the positive ions generated at the second discharge electrode 170 disappear before being discharged from the duct 20. Need to be reduced.

  The causes of the negative ions and positive ions disappearing in the duct 20 are captured by the induction electrode or the discharge electrode having the reverse polarity, trapped on the inner wall of the duct 20, and bound to the reverse polarity ion. .

  In the ion generator according to the present embodiment, the first discharge electrode 160 and the second discharge electrode 170 are arranged on the opposite sides in the duct 20 and separated from each other, so that negative ions and positive ions have opposite polarities. It is suppressed that it is supplemented by the discharge electrode which has.

  Further, in order to suppress negative ions and positive ions from being captured by the induction electrode, the distance between the first discharge electrode 160 and the induction electrode 180 and the distance between the second discharge electrode 170 and the induction electrode 180 are also illustrated. These distances are secured at a predetermined distance or more.

  The first discharge electrode 160 and the induction electrode 180, the second discharge electrode 170 and the induction electrode 180, and the distances between the electrodes in the first discharge electrode 160 and the second discharge electrode 170, which are electrically different in polarity, are By ensuring the predetermined distance or more, it is possible to suppress the occurrence of a leak current that may occur depending on the use environment. In conventional ion generators, for example, when an ion generator is used for a long time in a dusty and humid environment, dust adheres to the case of the ion generator, and leakage current is generated through the creepage of this case. There was something to do. In the ion generating apparatus according to the present embodiment, even if dust adheres to the case of the ion generator due to long-term use by securing the distance between the electrodes of different polarities to a predetermined distance or more, this case Leakage current between the electrodes through the creeping surface is less likely to occur.

  As described above, the induction electrode 180 is provided on the inner wall of the duct 20 so as to be shifted from the straight line connecting the tip of the first discharge electrode 160 and the tip of the second discharge electrode 170, thereby reducing the size. Within the restricted dimensions of the ion generator, the distance between the first discharge electrode 160 and the induction electrode 180 and the distance between the second discharge electrode 170 and the induction electrode 180 are each ensured to a maximum at a predetermined distance or more. can do.

  As described above, in the ion generating apparatus according to the present embodiment, the space inside the duct 20 is effectively used as much as possible, thereby suppressing the generation of leakage current due to long-term use while suppressing a decrease in ion emission efficiency. Thus, the durability can be improved and the enlargement of the duct 20 can be suppressed. In other words, compared to the case where the induction electrode 180 is provided in an internal space that is not the inner wall of the duct 20, the outer shape of the duct 20 can be reduced, and the ion generator can be downsized.

  In this embodiment, since negative ions and positive ions coexist in the duct 20, some of the negative ions and positive ions are combined and disappear, but the inner wall of the duct 20 can be suppressed from being charged.

  Therefore, when the negative ions and positive ions are trapped on the inner wall of the duct 20 more than the negative ions and positive ions are combined and disappear, the negative ions and positive ions are removed from the duct as in this embodiment. The ion emission efficiency can be improved by suppressing the inner wall of the duct 20 from being captured by the inner wall of the duct 20 and being charged.

  Moreover, it can also suppress that the case of an ion generator charges by suppressing that the inner wall of the duct 20 charges. Thereby, it can suppress that dust etc. adhere to the case of an ion generator by long-term use. As a result, it is possible to further suppress the generation of leakage current between the electrodes through the creeping surface of the case of the ion generator as described above.

  In the ion generator 100 of the ion generator according to the present embodiment, the first discharge electrode 160 and the second discharge electrode 170 are sandwiched between the first case portion 120 and the second case portion 130 as described above. It is located in the area 101.

  With this configuration, since the first discharge electrode 160 and the second discharge electrode 170 are located in a region surrounded by the case, when the ion generator 100 is attached or detached, the case serves as a protective wall and the first discharge electrode 160. Or it can suppress that an obstruction contacts the 2nd discharge electrode 170 directly.

Hereinafter, modifications of the present embodiment will be described.
FIG. 5 is a plan view showing a configuration of an ion generator according to a first modification of the present embodiment. As shown in FIG. 5, in the ion generator according to the first modification of the present embodiment, the two induction electrodes 180 are arranged on the inner wall of the duct 20 so as to face each other. In this case, the electric field distribution in the duct 20 can be made more uniform and the ion generation distribution can be made uniform as compared with the ion generator according to the present embodiment shown in FIG.

  FIG. 6 is a plan view showing a configuration of an ion generator according to a second modification of the present embodiment. As shown in FIG. 6, in the ion generator according to the second modification of the present embodiment, the duct 20 is divided into a first discharge electrode 160 side and a second discharge electrode 170 side.

  Specifically, a partition wall 21 is provided on the inner wall of the duct 20, and the inside of the duct 20 is divided into two. In this case, it is possible to prevent the negative ions 5 generated at the first discharge electrode 160 and the positive ions 6 generated at the second discharge electrode 170 from being combined and disappearing in the duct 20.

  In this modification, the inside of the duct 20 is divided so that negative ions and positive ions do not coexist, so the inner wall of the duct 20 tends to be biased to one potential, but the negative ions and positive ions are combined. Can be prevented from disappearing.

  Therefore, when the negative ions and the positive ions are combined and disappeared more than the negative ions and the positive ions are captured by the inner wall of the duct 20, the negative ions and the positive ions are By suppressing bonding and disappearance, the ion emission efficiency can be improved.

  Note that the shape of the case of the ion generator 100 can be changed as appropriate in accordance with the shape of the duct 20.

  Hereinafter, an ion generator according to Embodiment 2 of the present invention will be described with reference to the drawings. In addition, since the ion generator which concerns on this embodiment differs from the ion generator which concerns on Embodiment 1 only about arrangement | positioning of a discharge electrode, description is not repeated about another structure.

(Embodiment 2)
FIG. 7 is a plan view showing a configuration of an ion generator included in the ion generator according to Embodiment 2 of the present invention. FIG. 8 is a view of the ion generator of FIG. 7 as viewed from the direction of arrow VIII.

  As shown in FIGS. 7 and 8, the ion generator 200 included in the ion generator according to Embodiment 2 of the present invention includes a substrate 10, a needle-like first discharge electrode 260, and a needle-like second discharge electrode. 270, a flat induction electrode 180, and a case.

  The first discharge electrode 260 is electrically connected to the substrate 10 by a connection conductor (not shown), and discharges when negative voltage boosted by a transformer is applied to generate negative ions.

  The second discharge electrode 270 is electrically connected to the substrate 10 by a connection conductor (not shown), and is discharged by applying a positive voltage boosted by a transformer to generate positive ions.

  Each of the first discharge electrode 260 and the second discharge electrode 270 has a sharp needle shape. However, the shape of the first discharge electrode 260 and the second discharge electrode 270 is not limited to this, and may be an ultrathin line having a linearity of 0.3 mm or less. Alternatively, the first discharge electrode 260 and the second discharge electrode 270 are formed in a square pyramid shape by punching out from a metal thin plate by pressing to form an outer shape in plan view and plastically deforming only the tip portion by pressing again. It may be formed into a pointed shape.

  The case includes a main body case portion 110 that accommodates the substrate 10, a first case portion 220 from which the first discharge electrode 260 protrudes, and a second case portion 230 from which the second discharge electrode 270 protrudes.

  The body case part 110 has a rectangular outer shape in plan view. The first case part 120 is connected to the main body case part 110 and extends leftward in plan view. The second case portion 130 is connected to the main body case portion 110 and extends rightward in a plan view. The first case part 120 and the second case part 130 are located on the same straight line.

  In the present embodiment, the first discharge electrode 260 and the second discharge electrode 270 are arranged in parallel to each other.

Hereinafter, the ion generator according to the present embodiment will be described.
FIG. 9 is a plan view showing the configuration of the ion generator according to the present embodiment. As shown in FIG. 9, the ion generator according to the present embodiment is configured by inserting an ion generator 200 in the direction indicated by the arrow 1 and attaching it to the duct 20.

  The duct 20 has an opening (not shown) on the peripheral wall. The ion generator 200 is detachably attached to the opening. The case of the ion generator 200 is engaged with the opening of the duct 20 to form the inner wall of the duct 20. That is, the opening of the duct 20 is closed by the case of the ion generator 200.

  In the present embodiment, the first case portion 220 engages with the inner wall on one side of the duct 20. The second case portion 230 engages with the inner wall on one side of the duct 20. Accordingly, the first discharge electrode 260 protrudes from the inner wall on one side of the duct 20. The second discharge electrode 270 protrudes from the inner wall of the duct 20 so as to be aligned in parallel with the first discharge electrode 160 at a distance from the first discharge electrode 160 in a direction orthogonal to the blowing direction.

  The induction electrode 180 is disposed on one inner wall of the duct 20. As a result, the induction electrode 180 is disposed at a position between the protruding position of the first discharge electrode 260 and the protruding position of the second discharge electrode 270 on the inner wall of the duct 20, so The position is shifted from the straight line connecting the tip of the discharge electrode 270.

  In the present embodiment, the induction electrode 180 is disposed at a position where the distance between the first discharge electrode 260 and the induction electrode 180 and the distance between the second discharge electrode 270 and the induction electrode 180 are substantially equal. Has been. However, the position of the induction electrode 180 is not limited to this, and the distance between the first discharge electrode 260 and the induction electrode 180 and the distance between the second discharge electrode 270 and the induction electrode 180 are induced at different positions. An electrode 180 may be disposed.

  By applying a negative voltage to the first discharge electrode 260 and a positive voltage to the second discharge electrode 270, as shown by a two-dot chain line in FIG. 9, the gap between the first discharge electrode 260 and the second discharge electrode 270 is obtained. The electric field 9 is generated, the electric field 7 is generated between the first discharge electrode 260 and the induction electrode 180, and the electric field 8 is generated between the second discharge electrode 270 and the induction electrode 180. In addition, said electric field has shown a part of electric field which generate | occur | produces.

  Also in the ion generator according to the present embodiment, by making the most effective use of the space inside the duct 20, it is possible to suppress the generation of leakage current due to long-term use while suppressing a decrease in ion emission efficiency, thereby improving durability. It is possible to improve the size of the duct 20 and to improve the size. In other words, compared to the case where the induction electrode 180 is provided in an internal space that is not the inner wall of the duct 20, the outer shape of the duct 20 can be reduced, and the ion generator can be downsized.

  In the present embodiment, as indicated by the electric field 9 in FIG. 9, the electric field tends to spread in the protruding direction of the first discharge electrode 260 and the second discharge electrode 270. Therefore, for the duct having a large ratio of the vertical length to the horizontal length in FIG. 9, the first discharge electrode 260 and the second discharge electrode in the horizontal direction in FIG. By disposing the first discharge electrode 260 and the second discharge electrode 270 parallel to the vertical direction in FIG. 9 while disposing the 270 apart from each other, the discharge space inside the duct 20 is effectively used. be able to.

  Note that the shape of the case of the ion generator 200 can be appropriately changed in accordance with the shape of the duct 20.

  Hereinafter, an ion generator according to Embodiment 3 of the present invention will be described with reference to the drawings. In addition, since the ion generator which concerns on this embodiment differs in the magnitude | size of a duct, the arrangement | positioning or shape of an ion generator from the ion generator which concerns on Embodiment 1, description is not repeated about another structure.

(Embodiment 3)
FIG. 10 is a plan view showing a configuration of an ion generator according to Embodiment 3 of the present invention. As shown in FIG. 10, the duct 22 of the ion generator according to Embodiment 3 of the present invention is larger than the duct 20 of the ion generator according to Embodiment 1. Specifically, the duct 22 has a length in the vertical direction in FIG.

  In this way, when the ion generator 100 is inserted into the duct 22 that is long in the vertical direction and inserted from the lower side of the duct 22 in the direction indicated by the arrow 1, ions may not be sufficiently distributed in the upper part of the duct 22. is there.

  Therefore, in the ion generating apparatus according to the present embodiment, by inserting another ion generator 100 in the direction indicated by the arrow 8 from above the duct 22 and mounting the ion generator 100 sufficiently on the upper portion in the duct 22. Distribute. Thereby, ions can be distributed more uniformly in the duct 22.

  In the present embodiment, the first discharge electrode 160 and the second discharge electrode 170 are arranged on the left inner wall of the duct 22 in FIG. 10, and the first discharge electrode 160 and the second discharge electrode 170 are arranged on the right inner wall of the duct 22. Is arranged. However, depending on the wind flow in the duct 22, only the first discharge electrode 160 is disposed on the left inner wall of the duct 22 in FIG. 10 and only the second discharge electrode 170 is disposed on the right inner wall of the duct 22. However, there are cases where ions can be efficiently delivered from the ion generator. In order to do this, the other ion generator 100 may be reversed and attached to the duct 22.

  FIG. 11 is a plan view showing a configuration of an ion generator according to a first modification of the present embodiment. As shown in FIG. 11, the duct 23 of the ion generator according to the first modification of the present embodiment is larger than the duct 20 of the ion generator according to the first embodiment. Specifically, the duct 23 is longer in the left-right direction than the duct 20.

  When the ion generator 100 is inserted into the duct 23 that is long in the left-right direction and inserted in the direction indicated by the arrow 1 from below the duct 23, the ions cannot be sufficiently distributed in a part of the duct 23. There is.

  Therefore, in the ion generator according to this embodiment, the other ion generator 100 is further shifted in the left-right direction and inserted in the direction indicated by the arrow 8 from above the duct 23 to be mounted, whereby the entire inside of the duct 23 is installed. To sufficiently distribute ions. Thereby, ions can be distributed more uniformly in the duct 23.

  In addition, by arrange | positioning the 2nd discharge electrode 170 which has the same polarity back to back in the center in the left-right direction of the duct 23, it can reduce that the ion which generate | occur | produced is attracted to the electrode of different polarity and disappears.

  FIG. 12 is a plan view showing a configuration of an ion generator included in the ion generator according to the second modification of the present embodiment. FIG. 13 is a plan view showing a configuration of an ion generator according to a second modification of the present embodiment.

  As shown in FIG. 12, in the ion generator 300 included in the ion generator according to the second modification of the present embodiment, the case is positioned on the left side with the main body case portion 310 that accommodates the substrate 10. It includes a first case part 320 from which the first discharge electrode 160 and the second discharge electrode 170 protrude, and a second case part 330 that is located on the right side and from which the first discharge electrode 160 and the second discharge electrode 170 protrude.

  The case includes a container member that accommodates the substrate 10 and the like, and a flat lid member that engages with the container member. In the present embodiment, the container member and the lid member are formed by resin injection molding. As shown in FIG. 12, the lid member has a hole 311 at a position covering the external connection terminal.

  The main body case 310 includes a central portion having a rectangular shape in plan view and an arm portion extending left and right from the central portion. The first case portion 320 is connected to the left arm portion of the main body case portion 310 and extends so as to be orthogonal to the left arm portion in plan view. The second case portion 330 is connected to the right arm portion of the main body case portion 310 and extends so as to be orthogonal to the right arm portion in plan view. The first case part 320 and the second case part 330 face each other.

  The first case part 320 and the second case part 330 are connected to each other at the front end part and the center part opposite to the main body case part 310 side in the vertical direction.

  In the first case part 320, the first discharge electrode 160 and the second discharge electrode 170 protrude from the main body case part 310 side at intervals from each other. In the second case portion 330, the second discharge electrode 170 and the first discharge electrode 160 protrude from the main body case portion 310 side at intervals from each other.

  The first discharge electrode 160 protruding from the first case part 320 and the second discharge electrode 170 protruding from the second case part 330 face each other. The second discharge electrode 170 protruding from the first case part 320 and the first discharge electrode 160 protruding from the second case part 330 face each other.

  The two pairs of the first discharge electrode 160 and the second discharge electrode 170 are electrically connected to the substrate 10 in parallel with each other.

  In this modification, the induction electrode 180 is guided by the distance between the first discharge electrode 160 protruding from the first case part 320 and the induction electrode 180, and the second discharge electrode 170 protruding from the second case part 330. The distance between the electrode 180 and the electrode 180 is substantially equal.

  In this modification, the distance between the first discharge electrode 160 protruding from the first case part 320 and the second discharge electrode 170 is equal to the first discharge electrode 160 protruding from the first case part 320 and the induction electrode. Greater than 180 distance. In addition, the distance between the first discharge electrode 160 protruding from the second case part 330 and the second discharge electrode 170 is the distance between the second discharge electrode 170 protruding from the second case part 330 and the induction electrode 180. Greater than.

  As shown in FIG. 13, the ion generator according to this modification is configured by inserting an ion generator 300 in the direction indicated by the arrow 1 and mounting it on the duct 24.

  By applying a negative voltage to the first discharge electrode 160 and a positive voltage to the second discharge electrode 170, as shown by a two-dot chain line in FIG. The electric field 2 in the left-right direction, the electric field 3 between the first discharge electrode 160 and the induction electrode 180, the electric field 4 between the second discharge electrode 170 and the induction electrode 180, the first discharge electrode 160 and the second discharge electrode 170. An electric field 7 is generated in the vertical direction. In addition, said electric field has shown a part of electric field which generate | occur | produces.

  The first discharge electrode 160 and the induction electrode 180, the second discharge electrode 170 and the induction electrode 180, and the distances between the electrodes in the first discharge electrode 160 and the second discharge electrode 170, which are electrically different in polarity, are By securing a predetermined distance or more, negative ions and positive ions are suppressed from being captured by the discharge electrode having the reverse polarity, and negative ions and positive ions are suppressed from being captured by the induction electrode. It is possible to suppress the occurrence of leakage current that may occur depending on the usage environment. As a result, the ion generation efficiency and durability of the ion generator can be improved.

  In the present modification, the ion generator 300 need only be inserted into the large duct 24 from one direction, so that the configuration of the ion generator can be simplified and the ion generator can be downsized.

  It is assumed that the configurations that can be combined in the above-described embodiments and modifications are appropriately combined.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  2, 3, 4, 7, 8, 9 Electric field, 5 Negative ion, 6 Positive ion, 10 Substrate, 20, 22, 23, 24 Duct, 21 Partition wall, 100, 200, 300 Ion generator, 110, 310 Main body Case part, 111, 311 Hole part, 112 Convex part, 120, 220, 320 First case part, 130, 230, 330 Second case part, 160, 260 First discharge electrode, 170, 270 Second discharge electrode, 180 Induction electrode.

Claims (6)

A duct extending in the blowing direction;
A needle-like first discharge electrode protruding from the inner wall of the duct and applied with a negative voltage;
A needle-like second discharge electrode that projects from the inner wall of the duct at a distance from the first discharge electrode in a direction perpendicular to the blowing direction, and a positive voltage is applied;
It is disposed at a position between the protruding position of the first discharge electrode and the protruding position of the second discharge electrode on the inner wall of the duct, and connects the point of the first discharge electrode and the point of the second discharge electrode. An ion generator comprising: an induction electrode that is shifted from a straight line. The first discharge electrode protrudes from the inner wall on one side of the duct,
The second discharge electrode protrudes from the inner wall on the other side opposite to the one side of the duct so as to face the first discharge electrode,
The ion generator according to claim 1, wherein the induction electrode is disposed on an intermediate inner wall connecting the inner wall on the one side and the inner wall on the other side in the duct. Each of the first discharge electrode and the second discharge electrode protrudes from the inner wall on one side of the duct so as to be arranged in parallel with each other,
The ion generator according to claim 1, wherein the induction electrode is disposed on the inner wall on the one side.   The ion generator according to claim 2 or 3, wherein the induction electrode is disposed at a position where a distance from the first discharge electrode and a distance from the second discharge electrode are substantially the same.   The ion generator according to any one of claims 1 to 4, wherein the duct is internally divided into the first discharge electrode side and the second discharge electrode side. The duct has an opening in the peripheral wall;
The first discharge electrode, the second discharge electrode, and the induction electrode are provided in an ion generator detachable from the opening,
The ion generator includes a case that engages with the opening to form the inner wall of the duct;
The case includes a first case portion in which the first discharge electrode protrudes and engages with the inner wall on the one side, and a second case portion in which the second discharge electrode protrudes and engages with the inner wall on the other side,
The ion generator according to claim 2, wherein the first discharge electrode and the second discharge electrode are located in a region sandwiched between the first case part and the second case part.

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