JP2013041681A - Ion generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact ion generator in which internal leak is suppressed, i.e., decrease in manufacturing efficiency and increase in manufacturing cost are minimized, in a different standpoint.SOLUTION: The ion generator comprises: a housing that is constituted by a case 1 and a lid 2; a discharge electrode 3 that is provided in the housing; an induction electrode 4 that is provided in the housing and faces the discharge electrode 3 while being spaced apart therefrom; and a base plate 6 to which the discharge electrode 3 and the induction electrode 4 are fixed. In the housing, a mold resin is injected so that the main surface direction of the base plate 6 becomes the depth direction. The base plate 6 includes a slit 6A that is formed between the discharge electrode 3 and the induction electrode 4 and between the positive and negative discharge electrodes 3 so as to reach the bottom side of the housing closer than the discharge electrode 3 and the induction electrode 4.

Description

  The present invention relates to an ion generation device, and more particularly to an ion generation device in which a slit is provided in a substrate positioned between electrodes and a rib is provided in a housing as necessary.

  An ion generator using a discharge phenomenon has been put into practical use. One method is known in which ions are generated by applying a high voltage between an induction electrode and a discharge electrode. The positional relationship between the discharge electrode and the induction electrode in such an ion generator is disclosed in, for example, Japanese Patent Application Laid-Open No. 2006-210311 (Patent Document 1).

  In Patent Document 1, an induction electrode is printed on a substrate, the root of the discharge electrode is fixed on the same substrate, and the tip of the discharge electrode and the induction electrode are insulated by a space.

  In addition, International Publication No. 2004/019462 (Patent Document 2) shows an example in which an induction electrode is printed on a substrate and a plurality of discharge electrodes are arranged on the same substrate. Patent Document 2 also shows an example in which an induction electrode is molded.

  As described above, Patent Documents 1 and 2 disclose a device for increasing the creepage distance by utilizing the space and the front and back of the substrate for the creepage distance between the electrodes.

JP 2006-210311 A International Publication No. 2004/019462

  In the ion generator as described above, it is necessary to perform an insulation process such as a mold in order to ensure insulation between different poles that become a high voltage and to prevent discharge from the high-voltage transformer. Although the insulation is strengthened by the mold, internal leakage may occur between the mold surface and the conductive part even if the molding is performed.

  In order to make the ion generator compact and to reduce the cost, the induction electrode and the discharge electrode tend to be arranged on the same substrate. At this time, the discharge electrode cannot be molded because of the function of releasing ions. Therefore, even if the induction electrode is molded, as described above, it is not sufficient as a countermeasure against leakage, and in order to suppress leakage, it is basically best to secure a distance between both electrodes on the substrate. It becomes.

  However, from the viewpoint of making the ion generator as compact as possible, there is a conflicting problem that it is desired to reduce the distance between the electrodes as much as possible.

  Further, from a viewpoint different from the above, when the mold is performed for insulation strengthening, the injection amount of the mold is performed by quantitative injection, and as a result, the height of the liquid level is determined. However, when deciding the injection amount, it is easier to understand if there is some kind of management standard. At this time, there is also a problem that it is desired to easily manage the liquid level.

  12A and 12B are diagrams showing the internal structure of a conventional ion generator, where FIG. 12A is a top view and FIG. 12B is a side view. Referring to FIG. 12, the ion generator includes a discharge electrode 30, an induction electrode 40, and a substrate 60. The substrate 60 is provided with a slit 60A.

  In the example of FIG. 12, the needle-like discharge electrode 30 is inserted vertically into the substrate 60, the induction electrode 40 is disposed on the substrate 60, and the back surface side of the substrate 60 (the lower side of the substrate 60 in FIG. 12B). The structure which molds is adopted. At this time, even if the slit 60A is inserted between the plurality of discharge electrodes 30 or between the discharge electrode 30 and the induction electrode 40, if the slit 60A is filled with the mold, the gap between the discharge electrodes 30 or between the discharge electrode 30 and the induction electrode 30 is induced. The creepage distance between the electrodes 40 does not change with or without the slit 60A. In order to avoid this, it is necessary to precisely control the height of the liquid level when performing molding, which causes a decrease in manufacturing efficiency and an increase in manufacturing cost.

  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 that is compact and suppresses internal leakage. Another object of the present invention is to provide an ion generating device in which a decrease in manufacturing efficiency and an increase in manufacturing cost are suppressed.

  In one aspect, an ion generating apparatus according to the present invention includes a casing having a bottom and an upper part, a discharge electrode provided in the casing, and provided in the casing, spaced apart from and opposed to the discharge electrode. An induction electrode, a main surface extending in a vertical direction from the bottom to the top, and an electric circuit formed on the main surface for applying a voltage between the discharge electrode and the induction electrode. A substrate on which the electrode is fixed, and an insulating mold portion injected so that a longitudinal direction thereof is a depth direction in the housing, and the substrate includes a discharge electrode and an induction electrode between the discharge electrode and the induction electrode. It has the 1st slit part formed so that it might reach the bottom side rather than.

  In one embodiment, in the above ion generator, the case has a first rib, and the first rib is inserted into the first slit portion.

  In one embodiment, in the above ion generator, the first slit portion includes a first rib insertion slit into which the first rib is inserted and a first rib non-insertion slit into which the first rib is not inserted.

  In one embodiment, in the ion generator, the discharge electrode includes a first discharge electrode that generates positive ions and a second discharge electrode that generates negative ions, and the substrate includes the first discharge electrode and the second discharge electrode. A second slit portion is further formed between the discharge electrodes so as to reach the bottom side of the first discharge electrode and the second discharge electrode.

  In one embodiment, in the above ion generator, the case has a second rib, and the second rib is inserted into the second slit portion.

  In one embodiment, in the above ion generating apparatus, the second slit portion includes a second rib insertion slit into which the second rib is inserted and a second rib non-insertion slit into which the second rib is not inserted.

  In one embodiment, in the above ion generator, the first rib and the second rib protrude in a direction orthogonal to the main surface of the substrate.

  In one embodiment, in the above ion generator, the substrate has cutout portions located at both upper end portions of the substrate, and the discharge electrode and the first slit portion are provided at positions avoiding the cutout portion. The housing includes a third rib provided to face the notch.

  In one embodiment, in the above ion generator, the discharge electrode includes a first discharge electrode that generates positive ions and a second discharge electrode that generates negative ions, and the induction electrode faces the first discharge electrode. A first induction electrode for positive ions and a second induction electrode for negative ions facing the second discharge electrode, wherein the first induction electrode is opposite to the second discharge electrode with respect to the first discharge electrode. The second induction electrode is disposed on the opposite side of the first discharge electrode with respect to the second discharge electrode.

  In another aspect, an ion generator according to the present invention includes a housing having a bottom and an upper portion, a first discharge electrode that generates positive ions provided in the housing, and a second discharge electrode that generates negative ions. A main surface extending in the vertical direction from the bottom to the top, and an electric circuit formed on the main surface for applying a voltage to each of the first discharge electrode and the second discharge electrode. A substrate on which the two discharge electrodes are fixed, and an insulating mold portion that is injected so that a longitudinal direction thereof is a depth direction in the housing, and the substrate is disposed between the first discharge electrode and the second discharge electrode. And a slit portion formed so as to reach the bottom side of the first discharge electrode and the second discharge electrode.

  According to the present invention, as one effect, the ion generator can be made compact and internal leakage can be suppressed.

  Further, according to the present invention, as other effects, it is possible to suppress a decrease in manufacturing efficiency and an increase in manufacturing cost of the ion generator.

It is a sectional side view of the ion generator which concerns on Embodiment 1 of this invention. It is II-II sectional drawing in FIG. It is a disassembled perspective view (the 1) of the ion generator which concerns on Embodiment 1 of this invention. It is a disassembled perspective view (the 2) of the ion generator which concerns on Embodiment 1 of this invention. It is a disassembled perspective view (the 1) of the ion generator which concerns on Embodiment 2 of this invention. It is a disassembled perspective view (the 2) of the ion generator which concerns on Embodiment 2 of this invention. It is a disassembled perspective view (the 1) of the ion generator which concerns on Embodiment 3 of this invention. It is a disassembled perspective view (the 2) of the ion generator which concerns on Embodiment 3 of this invention. It is a figure which shows an example of the fixation structure of a discharge electrode. It is a figure which shows the other example of the fixation structure of a discharge electrode. It is a figure which shows the further another example of the fixation structure of a discharge electrode. It is a figure which shows the internal structure of the conventional ion generator, (a) is a top view, (b) is a side view.

  Embodiments of the present invention will be described below. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

  Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified.

(Embodiment 1)
1 is a side sectional view of an ion generator according to Embodiment 1, and FIG. 2 is a sectional view taken along line II-II in FIG.

  As shown in FIGS. 1 and 2, the ion generator according to the present embodiment includes a case 1 and a lid 2 as “housing”, a discharge electrode 3 and an induction electrode 4 as “ion generating elements”, and , An ion emission port 5, a substrate 6 on which a discharge electrode 3, an induction electrode 4 and a high voltage generation circuit (not shown) are mounted, and a battery 7 serving as a power source. The discharge electrode 3, the induction electrode 4, the substrate 6, and the battery 7 are housed in a housing that includes the case 1 and the lid 2. The case 1 has an area for mounting the battery 7 and an area for mounting the substrate 6, and the outer periphery of the substrate 6 is fixed by the substrate fixing rib 1 </ b> B of the case 1. More specifically, the notch 6B is formed at both upper ends of the substrate 6, and the substrate fixing rib 1B is provided so as to face the notch 6B. The discharge electrode 3 and the slit portion 6A are provided at positions avoiding the notch portion 6B. The casing is made of an insulating material such as resin.

  The ion generating element is for generating at least one of positive ions and negative ions by, for example, corona discharge by applying a high voltage generated by a high voltage generating circuit, and generates ions by a discharge phenomenon. It consists of a needle-like discharge electrode 3 for this purpose and a plate-like induction electrode 4 paired therewith. In the example of FIG. 1, the discharge electrode 3 and induction electrode 4 for positive ion generation (located on the left side in FIGS. 1 and 2), the discharge electrode 3 and induction electrode 4 for negative ion generation (FIG. 1, FIG. 1). (Located on the right side in FIG. 2).

  The discharge electrode 3 extends in a direction parallel to the main surface direction of the substrate 6, that is, the body portion of the discharge electrode 3 is soldered to the substrate 6, and the tip portion protrudes from the substrate 6. 6 is fixed.

  The induction electrode 4 is disposed on the same substrate 6 on which the discharge electrode 3 is fixed in a state of being separated from the discharge electrode 3. The induction electrode 4 may be, for example, a sheet metal fixed on the substrate 6 or a pattern printed on the substrate 6.

  As shown in FIGS. 1 and 2, when the positive discharge electrode 3 and the negative discharge electrode 3 are provided, the discharge electrodes 3 are arranged apart from each other, and the induction electrodes 4 are arranged on both sides thereof. To do.

  Considering the ion generation efficiency, for example, the positive discharge electrode 3 has a different polarity from the negative discharge electrode 3, and the positive induction electrode 4 is placed on the opposite side of the negative discharge electrode 3 side. However, since the electric field divided on both sides is generated with respect to the positive discharge electrode 3 and the balance of the electric field is improved, the induction electrode 4 is disposed on the opposite side of the discharge electrode 3 having a different polarity.

  That is, the induction electrode 4 (first induction electrode) for generating positive ions is different from the discharge electrode 3 (second discharge electrode) for negative ions with respect to the discharge electrode 3 (first discharge electrode) for positive ions. The induction electrode 4 (second induction electrode) that is arranged on the opposite side and generates negative ions is a positive ion discharge electrode 3 (first discharge electrode) with respect to the negative ion discharge electrode 3 (second discharge electrode). Disposed on the opposite side of the discharge electrode).

  In order to increase the creeping distance between the positive and negative discharge electrodes 3 having different polarities and between the discharge electrode 3 and the induction electrode 4, a slit 6A is provided on the substrate 6 positioned between them. . The slit 6A is formed so as to reach the lower side (bottom side) of the portion where the discharge electrode 3 and the induction electrode 4 on the substrate 6 are located, that is, the lower side in FIG.

  Two or more slits 6A are provided between the positive and negative discharge electrodes 3, between the positive discharge electrode 3 and the induction electrode 4, and between the negative discharge electrode 3 and the induction electrode 4, respectively (FIG. 1, FIG. 1). 2 in the example of 2).

  3 and 4 are exploded perspective views of the ion generator according to the present embodiment. As shown in FIGS. 3 and 4, when the substrate 6 on which the “ion generating element” and the “high voltage generating circuit” are mounted in the case 1, between the positive and negative discharge electrodes 3 having different polarities, Ribs 1 </ b> A protruding from the case 1 are fitted into one of the slits 6 </ b> A between the discharge electrode 3 and the induction electrode 4. By providing the rib 1A, an insulating wall is formed perpendicular to the substrate 6 and the creepage distance increases. In addition, a space is formed on the main surface of the substrate 6 in the slit 6A in which the rib 1A is not fitted. This increases the creepage distance and the spatial distance between the electrodes.

  Mold resin for reinforcing the insulation is injected into the casing. At this time, if only the slit 6A is formed in the substrate 6, the electrodes are connected through the upper surface of the mold resin. In contrast, in the present embodiment, the creepage distance is increased by providing the rib 1A and raising the wall. Further, if there is no slit 6A into which the rib 1A is not fitted and there is only the above wall, the electrodes are connected through the end surface of the substrate 6 and the end surface of the rib 1A. On the other hand, in this embodiment, since the slit 6A into which the rib 1A is not fitted is provided, the creeping distance can be increased by the unevenness caused by the rib and the slit.

  In this embodiment, as an example, the molding resin is set on the lower surface of the substrate fixing rib 1B, and as a result, the entire induction electrode 4 is molded. However, the induction electrode 4 is entirely molded. However, a part thereof may be above the liquid surface boundary line of the mold resin.

  The rib 1B can fix the substrate 6 to the case 1 and can be used as a guideline for injecting the mold resin as a liquid surface limit line of the mold resin.

  Thus, according to the ion generator which concerns on this Embodiment, the creeping distance between each electrode can be expanded in the limited space. As a result, it is compact, has high production efficiency, reduces cost, suppresses leakage inside the apparatus, and can perform efficient ion emission.

  Next, the structure and manufacturing method of the ion generator according to the present embodiment will be described more specifically.

  As a specific size of the ion generator according to the present embodiment, for example, a size of about 50 mm wide × 50 mm long × 10 mm thick (including the battery 7) can be assumed. The length of the discharge electrode 3 can be assumed to be about 5 mm, for example, and the size of the induction electrode 4 can be assumed to be about 5 mm × 2 mm, for example. It can be assumed that the distance between the positive and negative discharge electrodes 3 is, for example, about 10 mm, the distance between the discharge electrode 3 and the induction electrode 4 is, for example, about 10 mm, and the width of the slit 6A is, for example, about 1.2 mm. However, these values are merely examples, and the scope of the present invention is not limited thereto.

  For example, when the length of the discharge electrode 3 is about 5 mm, the length of about 3 mm of the body portion is soldered to the substrate 1. An ion emission port 5 is provided on the extension of the tip of the discharge electrode 3, from which ions are emitted.

  A mold injection port 8 is provided in the upper part of the case 1 (portion where the ion emission port 5 is located). As shown in FIGS. 3 and 4, the substrate 6 is mounted on the case 1, the lid 2 is further covered with the lid 2, the lid 2 is sealed, and then the mold resin is injected from the mold injection port 8. In the case where the battery 7 is provided, wiring is made between the battery 7 and the substrate 6, but the periphery of the wiring is also sealed in advance. When injecting the mold resin, the fixed amount injection is performed first, but since the liquid level of the mold resin varies depending on individual differences such as the case, fine adjustment is manually performed at the end. At this time, by setting the back surface of the substrate fixing rib 1B to the mold height, it can be used as a guideline for determining the injection amount, the amount can be confirmed, and the operation is easy.

  By embedding the induction electrode 4 in the mold resin, leakage inside the apparatus can be suppressed and the insulation can be enhanced.

  When the mold resin is injected up to the height of the back surface of the substrate fixing rib 1B, the combination of the slit 6A and the rib 1A causes a plurality of discharge electrodes 3 and between the discharge electrodes 3 and the induction electrodes 4 as shown in FIG. A space (a place where the rib 1A is not fitted) and an unevenness (a place where the rib 1A is fitted) are formed, and the spatial distance and the creepage distance can be increased. Also, when viewed from the direction shown in FIG. 1, irregularities are formed between the upper end surface of the substrate 6 and the upper surface of the mold (the lower surface of the rib 1B), and the creeping distance is increased. Thus, the creepage distance can be expanded three-dimensionally by the slit and the rib.

  The discharge electrode 3 is typically fixed to the substrate 6 by laying on the substrate 6 as shown in FIG. 9 and soldering the body portion thereof, but as shown in FIG. 3 may be bent at a right angle, and the base may be soldered to the substrate 6. Furthermore, as shown in FIG. 11, it is also possible to change the direction of the surface where ions are generated by bending the tip of the discharge electrode 3 at a right angle. That is, the scope of the present invention is not limited by the direction of the needle tip of the discharge electrode 3.

  The “mold line” shown in FIGS. 9 to 11 means the upper surface height of the mold resin injected into the housing, but the “mold line” is limited to those explicitly shown in FIGS. 9 to 11. Rather, as described above, slight variations are possible.

  A high voltage generation circuit (not shown) formed on the substrate 6 includes a high voltage transformer, a switching element, an oscillation circuit, and the like. The secondary side of the high voltage transformer is connected to the discharge electrode 3 and the induction electrode 4 via a high voltage rectifier circuit or the like. A switching element and an oscillation circuit that drives the switching element are connected to the primary side of the high-voltage transformer. The high voltage generation circuit further includes a power supply circuit for supplying power to the primary side of the oscillation circuit and the high voltage transformer. The slit 6 </ b> A in the substrate 6 is disposed while avoiding the high voltage generation circuit and the wiring pattern of the discharge electrode 3 and the induction electrode 4.

  The polarity of the ion to be generated does not matter whether it is a unipolar release of positive ions or negative ions or a bipolar release of positive ions and negative ions. When generating both positive ions and negative ions, positive corona discharge is generated at the tip of one discharge electrode 3 to generate positive ions, and negative corona discharge is generated at the tip of the other discharge electrode 3 to generate negative ions. Generate ions. The applied waveform is not particularly limited here, and is a high voltage such as a direct current, an alternating current waveform biased positively or negatively, or a pulse waveform biased positively or negatively. A voltage region is selected such that the voltage value is sufficient to generate a discharge and sufficient to generate a predetermined ion species.

The ionic species to be generated are not limited in the present invention, but can be generated in a limited manner. As an ion species assumed at that time, a positive ion is a cluster ion in which a plurality of water molecules are attached around a hydrogen ion (H ⁺ ), and H ⁺ (H ₂ O) _m (m is an arbitrary natural number). Represented as: Negative ions are cluster ions in which a plurality of water molecules are attached around oxygen ions (O ₂ ⁻ ), and are expressed as O ₂ ⁻ (H ₂ O) _n (n is an arbitrary natural number).

Moreover, if the above-described positive ions and negative ions are released, H ⁺ (H ₂ O) _m (m is an arbitrary natural number) in the air and O ₂ ⁻ which is a negative ion. By generating approximately the same amount of (H ₂ O) _n (where n is an arbitrary natural number), both ions surround the fungi and viruses floating in the air, and water of active species generated at that time It is possible to remove floating molds and the like by the action of the oxidizing radical (.OH).

  Note that an external DC power supply may be used as the power supply input to the ion generator instead of the battery 7 described above. When the battery 7 is used, it can be used in a place without an outlet. Even when an external DC power supply is used, it can operate by receiving power supply from a product such as an air purifier. In addition, the positive / negative ion generating part is not limited to one set, and may be two or more sets.

  1 to 4, the slit 6A between the discharge electrode 3 and the induction electrode 4 is formed deeper than the slit 6A between the positive and negative discharge electrodes 3. May be reversed. Since the potential difference between the discharge electrode 3 on the positive ion side and the discharge electrode on the negative ion side is larger than the potential difference between the discharge electrode 3 and the induction electrode 4, the slit 6A between the positive and negative discharge electrodes 3 is formed deeper. This makes it possible to more reliably increase the creepage distance in a portion where the potential difference is large.

  As a method for delivering ions from the apparatus to the room, either a case of sending ions by blowing or a case of sending ions without wind may be selected.

  The above contents are summarized as follows. That is, the ion generating apparatus according to the present embodiment includes a case made up of case 1 and lid 2, discharge electrode 3 provided in the case, and provided in the case and spaced from discharge electrode 3. And an opposing induction electrode 4 and a substrate 6 to which the discharge electrode 3 and the induction electrode 4 are fixed. The main surface of the substrate 6 extends in the vertical direction (vertical direction) in FIG. Mold resin is injected into the housing such that the main surface direction (vertical direction) of the substrate 6 is the depth direction. The substrate 6 has a slit 6A formed between the discharge electrode 3 and the induction electrode 4 and between the positive and negative discharge electrodes 3 so as to reach the bottom side of the casing with respect to the discharge electrode 3 and the induction electrode 4. doing. The case 1 has a rib 1A, and the rib 1A is inserted into the slit 6A. Further, the substrate 6 has a plurality of slits 6A between the electrodes, and the plurality of slits 6A include those in which the ribs 1A are inserted and those in which the ribs 1A are not inserted.

(Embodiment 2)
5 and 6 are exploded perspective views of the ion generator according to Embodiment 2. FIG. The ion generating apparatus according to the present embodiment is a modification of the ion generating apparatus according to the first embodiment. As shown in FIGS. 5 and 6, the shape of the case 1 is different from that of the first embodiment. Has a part.

  That is, the case 1 according to the present embodiment is divided into a first member 11 and a second member 12. The second member 12 is attached to the first member 11 after the substrate 6 is installed on the first member 11, the lid 2 is attached, and the mold resin is injected.

  The second member 12 is provided with an ion emission port 5, and the inside of the housing can be visually recognized through the ion emission port 5.

  In the present embodiment, the mold resin can be injected while the upper part of the housing is open, so that the mold injection port 8 as in the first embodiment is unnecessary.

(Embodiment 3)
7 and 8 are exploded perspective views of the ion generator according to Embodiment 3. FIG. The ion generator according to the present embodiment is a further modification of the ion generator according to the second embodiment.

  That is, the case 1 according to the present embodiment is divided into the first member 11 and the second member 12 as in the second embodiment. The second member 12 is attached to the first member 11 after the substrate 6 is installed on the first member 11, the lid 2 is attached, and the mold resin is injected and before the mold resin is cured.

  A structural feature different from the second embodiment is that the rib 1 </ b> A is provided not on the first member 11 but on the second member 12. The rib 1A is formed so as to extend from the upper part (on the ion emission port 5 side) to the bottom part (on the battery 7 side) of the housing. The rib 1A is fitted into the slit 6A of the substrate 6 as in the first and second embodiments.

  Also in the present embodiment, as in the second embodiment, since the mold resin can be injected with the upper portion of the housing opened, the mold injection port 8 as in the first embodiment is unnecessary. .

  Further, the second member 12 can be fixed by hardening the mold resin.

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 case, 1A rib, 1B substrate fixing rib, 2 lid, 3 discharge electrode, 4 induction electrode, 5 ion emission port, 6 substrate, 6A slit, 6B notch, 7 battery, 8 mold injection port, 11th 1 member, 12 second member.

Claims (10)

A housing having a bottom and a top;
A discharge electrode provided in the housing;
An induction electrode provided in the housing, spaced apart from and opposed to the discharge electrode;
A main surface extending in a vertical direction from the bottom toward the top, and an electric circuit formed on the main surface for applying a voltage between the discharge electrode and the induction electrode; and A substrate on which the induction electrode is fixed;
Insulating mold portion injected so that the longitudinal direction is the depth direction in the housing,
The substrate has a first slit portion formed between the discharge electrode and the induction electrode so as to reach the bottom side of the discharge electrode and the induction electrode. The housing has a first rib;
The ion generator according to claim 1, wherein the first rib is inserted into the first slit portion.   The ion generation device according to claim 2, wherein the first slit portion includes a first rib insertion slit into which the first rib is inserted and a first rib non-insertion slit into which the first rib is not inserted. The discharge electrode includes a first discharge electrode that generates positive ions and a second discharge electrode that generates negative ions,
The substrate further includes a second slit portion formed between the first discharge electrode and the second discharge electrode so as to reach the bottom side of the first discharge electrode and the second discharge electrode. The ion generator in any one of Claims 1-3. The housing has a second rib;
The ion generator according to claim 4, wherein the second rib is inserted into the second slit portion.   6. The ion generator according to claim 5, wherein the second slit portion includes a second rib insertion slit into which the second rib is inserted and a second rib non-insertion slit into which the second rib is not inserted.   The ion generator according to claim 5 or 6, wherein the first rib and the second rib protrude in a direction perpendicular to the main surface of the substrate. The substrate has notches located at both upper ends of the substrate;
The discharge electrode and the first slit portion are provided at positions avoiding the notch portion,
The ion generator according to any one of claims 1 to 7, wherein the casing includes a third rib provided to face the notch. The discharge electrode includes a first discharge electrode that generates positive ions and a second discharge electrode that generates negative ions,
The induction electrode includes a first induction electrode for positive ions facing the first discharge electrode, and a second induction electrode for negative ions facing the second discharge electrode,
The first induction electrode is disposed on the opposite side of the second discharge electrode with respect to the first discharge electrode,
The ion generator according to any one of claims 1 to 3, wherein the second induction electrode is disposed on the opposite side of the first discharge electrode with respect to the second discharge electrode. A housing having a bottom and a top;
A first discharge electrode for generating positive ions and a second discharge electrode for generating negative ions provided in the housing;
A main surface extending in the vertical direction from the bottom toward the top, and an electric circuit formed on the main surface for applying a voltage to each of the first discharge electrode and the second discharge electrode; A substrate on which one discharge electrode and the second discharge electrode are fixed;
Insulating mold portion injected so that the longitudinal direction is the depth direction in the housing,
The substrate has a slit portion formed between the first discharge electrode and the second discharge electrode so as to reach the bottom side of the first discharge electrode and the second discharge electrode. apparatus.

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