WO2015050045A1

WO2015050045A1 - Ion generation device and electrical machine

Info

Publication number: WO2015050045A1
Application number: PCT/JP2014/075567
Authority: WO
Inventors: 哲也江崎; 与明高土; 聡彦山本; 慶太郎山田; 世古口　美徳
Original assignee: シャープ株式会社
Priority date: 2013-10-02
Filing date: 2014-09-26
Publication date: 2015-04-09
Also published as: CN105474483B; CN105474483A; JP6062561B2; JPWO2015050045A1

Abstract

Provided is an ion generation device able to supply a high concentration of ions even at high humidity. The ion generation device is provided with a discharge electrode (40) and a substrate (50). The discharge electrode (40) has a tip (40a), and generates ions from the tip (40a) by discharging. The substrate (50) has one principal surface (50a) and another principal surface (50b). Formed on the substrate (50) is a through hole (50h) penetrating from the one principal surface (50a) to the other principal surface (50b). The discharge electrode (40) is inserted into the through hole (50h). The tip (40a) of the discharge electrode (40) projects out from the one principal surface (50a) of the substrate (50). The ion generation device is further provided with a mold material (61) and an obstructing material (62). The mold material (61) is provided only to the other principal surface (50b) side of the substrate (50), and covers the through hole (50h). The obstructing material (62) obstructs a gap (G) between the substrate (50) and the discharge electrode (40).

Description

Ion generator and electrical equipment

The present invention relates to an ion generation device and an electric device, and more particularly to an ion generation device including a discharge electrode and an electric device using the ion generation device.

Conventionally, ion generators are used to purify, sterilize, or deodorize indoor air. Many ion generators generate positive ions and negative ions by corona discharge.

JP 2012-134052 A (Patent Document 1) discloses an example of an electrode substrate unit for a charging device or a slow current device. A high-voltage line connected to the high-voltage generating circuit and a discharge electrode contact for connecting the proximal end side of the discharge electrode needle are formed on the substrate body, and a current flows between the high-voltage line and the discharge electrode contact. The limiting resistance element is mounted. Further, it is described that a substrate case member for holding a substrate is formed integrally with the substrate by injection molding in which the substrate is included in an insulating resin material.

JP 2012-134052 A

In the electrode substrate unit described in Patent Document 1, the substrate case member and the substrate are integrally formed by injection molding, thereby improving the adhesion while ensuring the productivity. Thereby, creeping discharge on the substrate surface can be surely prevented.

However, in the electrode substrate unit described in Patent Document 1, it is possible to prevent creeping discharge on the substrate surface surrounded by the substrate case member, but the root portion of the discharge electrode needle (discharge electrode holder holding the discharge electrode needle) No special measures have been taken. Therefore, under high humidity, moisture including dust enters a slight gap between the discharge electrode needle and the discharge electrode holder, which may cause a weak abnormal discharge or leakage, leading to a decrease in output. Further, a slight gap provided around the discharge electrode needle for introducing air into the discharge electrode needle may cause a decrease in output under high humidity for the same reason.

The present invention has been made in view of the above-described problems, and a main object of the present invention is to provide an ion generator and an electric device that can supply high-concentration ions without causing a decrease in output even under high humidity. Is to provide.

The ion generator according to the present invention includes a discharge electrode and a substrate. The discharge electrode has a tip, and ions are generated from the tip by discharge. The substrate has one main surface and the other main surface. A through-hole penetrating from one main surface to the other main surface is formed in the substrate. The discharge electrode is inserted through the through hole. The tip of the discharge electrode protrudes from one main surface of the substrate. The ion generator further includes a mold material and a blocking material. The molding material is provided only on the other main surface side with respect to the substrate, and covers the through hole. The closing material closes the gap between the substrate and the discharge electrode.

In the above ion generator, the substrate is preferably a double-sided substrate in which a conductor pattern is formed on both one main surface and the other main surface. The substrate has a conductor layer covering the inner wall surface of the through hole. The closing material passes through the substrate and closes the gap between the conductor layer and the discharge electrode.

In the above ion generator, the substrate is preferably a single-sided substrate in which a conductor pattern is formed only on the other main surface. The ion generator further includes a conductive portion that electrically connects the conductor pattern and the discharge electrode. The closing material closes the gap between one main surface and the discharge electrode.

In the above ion generator, preferably, one main surface of the substrate is arranged toward an air path through which a gas carrying ions generated by the discharge electrode flows. The tip of the discharge electrode is disposed in the air path.

The ion generator preferably further includes a housing for holding the substrate. The mold material is filled in a space defined by the substrate and the casing.

Preferably, in the above ion generator, a high voltage generation unit that generates a high voltage to be applied to the discharge electrode, a connection unit that electrically connects the high voltage generation unit and the discharge electrode, a housing, and a high voltage generation unit And a second housing that accommodates the connecting portion.

Preferably, in the above ion generator, a high voltage generator that generates a high voltage to be applied to the discharge electrode, a first casing that holds the substrate and the high voltage generator, and a second casing that houses the first casing Is further provided.

Preferably, the ion generator includes the ion generator according to any one of the above aspects and a blower that blows a gas that conveys ions generated by discharge electrodes of the ion generator.

The ion generator of the present invention can supply high-concentration ions without causing a decrease in output even under high humidity.

It is a side view which shows schematic structure of an electric equipment provided with the ion generator in Embodiment 1 of this invention. 1 is a plan view showing a configuration of an ion generator according to Embodiment 1. FIG. It is a side view which shows the ion generator seen from the direction shown by the arrow III in FIG. It is a side view which shows the ion generator seen from the direction shown by arrow IV in FIG. 2 is a plan view showing an internal structure of the ion generator according to Embodiment 1. FIG. FIG. 6 is a cross-sectional view of the ion generator taken along line VI-VI shown in FIG. 5. FIG. 6 is a cross-sectional view of the ion generator taken along line VII-VII shown in FIG. 3 is an enlarged view of the vicinity of a discharge electrode in the ion generator of Embodiment 1. FIG. 1 is a circuit diagram showing a configuration of an ion generator according to Embodiment 1. FIG. It is a schematic diagram which shows the 1st example of the relationship between the ion generator of Embodiment 1, and an air path. It is a schematic diagram which shows the 2nd example of the relationship between the ion generator of Embodiment 1, and an air path. It is a top view which shows the internal structure of the ion generator of Embodiment 2. FIG. 5 is an enlarged view of the vicinity of a discharge electrode in the ion generator of Embodiment 3. 6 is a plan view showing an internal structure of an ion generator according to Embodiment 4. FIG. FIG. 10 is a plan view showing an internal structure of an ion generator according to Embodiment 5.

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

(Embodiment 1)
FIG. 1 is a side view showing a schematic configuration of an electric device 100 including an ion generation device 26 according to Embodiment 1 of the present invention. The electric device 100 may be, for example, an ion generator, an air conditioner, a dehumidifier, a humidifier, an air cleaner, a fan heater, or other devices. The electrical device 100 is a device that is preferably used to adjust air in a house, a building, a hospital room, a car cabin, an airplane cabin, or a ship vessel.

As shown in FIG. 1, the electrical device 100 includes an ion generator 26, a blower 16, and

ducts

12 and 15. The

ducts

12 and 15 are hollow, and the air passage 10 through which air flows is formed by the internal spaces of the

ducts

12 and 15 communicating with each other. The air blower 16 is provided at the opening of the duct 12 and forms an air flow in the air passage 10. The air blower 16 may be a sirocco fan, a cross flow fan, or another fan.

The ion generator 26 is disposed inside the duct 15. The ion generator 26 may be configured to be integrated into the electric device 100. Alternatively, the ion generator 26 may be provided so as to be detachable from the electric device 100. In this case, the ion generator 26 can be made to have a replaceable specification, so that maintenance of the electric device 100 is facilitated.

FIG. 2 is a plan view showing the configuration of the ion generator 26 of the first embodiment. FIG. 3 is a side view showing the ion generator 26 as seen from the direction indicated by the arrow III in FIG. FIG. 4 is a side view showing the ion generator 26 as seen from the direction indicated by the arrow IV in FIG. FIG. 5 is a plan view showing the internal structure of the ion generator 26 of the first embodiment. FIG. 6 is a cross-sectional view of the ion generator 26 along the line VI-VI shown in FIG. FIG. 7 is a cross-sectional view of the ion generator 26 taken along the line VII-VII shown in FIG. With reference to FIGS. 2 to 7, the structure of the ion generator 26 of the present embodiment will be described in detail.

The ion generator 26 of Embodiment 1 includes an outer case 31, a discharge electrode 40, an induction electrode (counter electrode) 45, a substrate 50, a high voltage generation circuit unit 53, a substrate support case 54, and a substrate support case. 55 and wiring 56 and wiring 57 are mainly provided.

The discharge electrode 40 includes a first needle-like electrode 41, a second needle-like electrode 42, a third needle-like electrode 43, and a fourth needle-like electrode 44. Each of the first to fourth needle-like electrodes 41 to 44 is formed in a needle shape, extends linearly, and has a needle tip with a sharpened tip. The first to fourth needle-like electrodes 41 to 44 are arranged in the same plane so that the extending directions of the respective electrodes are parallel to each other.

The first acicular electrode 41 and the third acicular electrode 43 are arranged side by side with an interval in a direction orthogonal to the extending direction. The 2nd acicular electrode 42 and the 4th acicular electrode 44 are arrange | positioned along with the space | interval in the direction orthogonal to each extending direction.

The first needle-like electrode 41 and the second needle-like electrode 42 are arranged to face each other with a distance in the extending direction. The needle tip of the first needle electrode 41 and the needle tip of the second needle electrode 42 face each other. The central axis of the first acicular electrode 41 and the central axis of the second acicular electrode 42 are located on the same straight line. The third acicular electrode 43 and the fourth acicular electrode 44 are arranged to face each other with a distance in the extending direction. The needle tip of the third needle electrode 43 and the needle tip of the fourth needle electrode 44 face each other. The central axis of the third acicular electrode 43 and the central axis of the fourth acicular electrode 44 are located on the same straight line.

The induction electrode 45 is disposed between the first acicular electrode 41 and the third acicular electrode 43. The induction electrode 45 is disposed away from both the first needle-like electrode 41 and the third needle-like electrode 43. The induction electrode 45 is provided at a position where the distance between the first acicular electrode 41 and the induction electrode 45 and the distance between the third acicular electrode 43 and the induction electrode 45 are equal to each other. Yes. The induction electrode 45 is also provided at a position where the distance between the second acicular electrode 42 and the induction electrode 45 and the distance between the fourth acicular electrode 44 and the induction electrode 45 are equal to each other. ing. By providing the induction electrode 45 in the middle between the first needle-like electrode 41 and the third needle-like electrode 43, the induction electrode 45 is located farthest from both the first and third needle-

like electrodes

41, 43. And the amount of ions recovered by the induction electrode 45 and disappearing can be reduced.

The first to fourth needle-like electrodes 41 to 44 generate ions by discharge. The first acicular electrode 41 and the fourth acicular electrode 44 generate positive ions. The second acicular electrode 42 and the third acicular electrode 43 generate negative ions. The first acicular electrode 41 and the third acicular electrode 43 generate ions having different polarities, and the second acicular electrode 42 and the fourth acicular electrode 44 have different polarities. Is generated. The first acicular electrode 41 and the second acicular electrode 42 generate ions having different polarities, and the third acicular electrode 43 and the fourth acicular electrode 44 have different polarities. Is generated.

Of the first to fourth needle-shaped electrodes 41 to 44, two needle-shaped electrodes arranged adjacent to each other or facing each other generate ions of different polarities. By separating the needle electrodes that generate ions of different polarity, it is possible to suppress the decrease in ion concentration due to neutralization of the generated positive ions and negative ions, or collection of ions to the different polarity electrode, etc. A higher concentration of ions can be generated.

The first to fourth needle-like electrodes 41 to 44 are arranged so that the generated positive ions and negative ions are easily mixed. For example, the first to fourth needle-like electrodes 41 to 44 have an air flow relative to the first to fourth needle-like electrodes 41 to 44. Even if the air path is branched downstream (downstream), positive ions and negative ions can be supplied to each branch duct in a balanced manner, and both high-concentration positive ions and negative ions are supplied to the indoor space. Can release mixed air.

The high voltage generation circuit unit 53 generates a high voltage to be applied to the first to fourth needle electrodes 41 to 44. When a positive high voltage is applied to the first needle electrode 41 and a negative high voltage is applied to the third needle electrode 43, a corona discharge is generated between the discharge electrode and the induction electrode 45. , Positive ions and negative ions are generated. Similarly, when a negative high voltage is applied to the second acicular electrode 42 and a positive high voltage is applied to the fourth acicular electrode 44, a corona discharge is generated between the discharge electrode and the induction electrode 45. And negative ions and positive ions are generated.

The substrate 50 has the discharge electrode 40 mounted thereon. The substrate 50 has one main surface 50a and the other main surface 50b opposite to the one main surface 50a. The substrate 50 includes a substrate 51 as a first substrate and a substrate 52 as a second substrate as separate different substrates. The substrate 51 and the substrate 52 are provided to face each other. The substrate 51 has one surface 51a and the other surface 51b, and the substrate 52 has one surface 52a and the other surface 52b. The

substrates

51 and 52 are arranged so that the surface 51a and the surface 52a face each other.

The first acicular electrode 41 and the third acicular electrode 43 are mounted on the substrate 51. The first needle-like electrode 41 and the third needle-like electrode 43 are fixed to the substrate 51 so that the respective needle tips protrude from the surface 51a. The second acicular electrode 42 and the fourth acicular electrode 44 are mounted on the substrate 52. The second needle-like electrode 42 and the fourth needle-like electrode 44 are fixed to the substrate 52 such that the respective needle tips protrude from the surface 52a.

The high voltage generation circuit unit 53 is provided on the other surface 51 b side with respect to the substrate 51. The substrate support case 54 is provided so as to support the substrate 51 and cover the high voltage generation circuit unit 53. The substrate support case 54 has a function as a first housing that accommodates and holds the high voltage generation circuit unit 53 and the substrate 51. The substrate support case 55 is provided to support the substrate 52. The substrate support case 55 has a function as a housing that accommodates and holds the substrate 52.

The substrate 51 is formed with a via electrode extending in the thickness direction of the substrate 51 and an electrode pattern extending in a plane direction orthogonal to the thickness direction. These via electrodes and electrode patterns include a connection member that electrically connects the high voltage generation circuit portion 53 and the first and third needle-

like electrodes

41 and 43. The wiring 56 is provided as a connection member that electrically connects the high voltage generation circuit portion 53 and the second needle electrode 42. The wiring 57 is provided as a connection member that electrically connects the high voltage generation circuit unit 53 and the fourth needle electrode 44. The

wirings

56 and 57 are high voltage lines having insulation resistance corresponding to the high voltage generated in the high voltage generation circuit unit 53.

The substrate support case 55 is provided so as to cover the contacts between the second and

fourth needle electrodes

42 and 44 and the

wirings

56 and 57 on the substrate 52. A space defined by the surface 52 b of the substrate 52 and the substrate support case 55 is filled with a molding material 61. The molding material 61 is filled in a space surrounded by the substrate 52 and the substrate support case 55. The molding material 61 is provided only on the surface 52b side with respect to the substrate 52, and no molding material is provided on the surface 52a side.

The outer case 31 is provided as a casing that forms the appearance of the ion generator 26. The outer case 31 is integrally formed of a resin material. The outer case 31 has

substrate housing portions

32 and 33 and rib-like portions 34 to 36 as its constituent parts. The exterior case 31 has a rectangular frame shape in which four sides are constituted by the substrate housing portion 32, the rib-like portion 35, the substrate housing portion 33, and the rib-like portion 34. The outer case 31 has a rectangular plan view having a long side extending along the extending direction of the discharge electrode 40 and a short side extending along a direction orthogonal to the extending direction of the discharge electrode 40. .

The substrate housing part 32 and the substrate housing part 33 are arranged in parallel at a distance from each other. The substrate housing part 32 has a larger volume than the substrate housing part 33. The substrate accommodating portion 32 accommodates a substrate 51, a high voltage generation circuit portion 53, and a substrate support case 54. A substrate 52 and a substrate support case 55 are accommodated in the substrate accommodating portion 33. The exterior case 31 has a function as a second housing that accommodates the

substrate support cases

54 and 55, the substrate 52, the high voltage generation circuit unit 53, and the

wirings

56 and 57.

The first acicular electrode 41 and the third acicular electrode 43 protrude from the surface 51 a of the substrate 51 and extend to the outside of the outer case 31. The second acicular electrode 42 and the fourth acicular electrode 44 protrude from the surface 52 a of the substrate 52 and extend outside the outer case 31. In addition to the configuration shown in FIG. 5, in order to improve safety, a protective cover that prevents direct contact with the needle tips of the first to fourth needle-like electrodes 41 to 44 may be provided.

The first and third

acicular electrodes

41 and 43, the induction electrode 45, the substrate 51, the high voltage generation circuit unit 53, and the substrate support case 54 constitute a power supply unit. The 2nd and 4th

acicular electrodes

42 and 44, the board | substrate 52, and the board | substrate support case 55 comprise the electrode unit.

Both the substrate 51 on which the first and third needle-

like electrodes

41 and 43 are mounted and the substrate 52 on which the second and fourth needle-

like electrodes

42 and 44 are mounted are in the outer case 31. Contained. Thus, the first to fourth needle-like electrodes 41 to 44 are made into one unit. The outer case 31 further accommodates a high voltage generation circuit unit 53, an induction electrode 45,

substrate support cases

54 and 55, and wirings 56 and 57, and each element constituting the ion generator 26 is included in the outer case 31. It is housed and integrated. Since the first to fourth needle-like electrodes 41 to 44 are unitized, the positioning accuracy of the first to fourth needle-like electrodes 41 to 44 is improved, and the first to fourth needle-like electrodes 41 to 44 are improved. The needle electrodes 41 to 44 are easy to handle.

The rib-shaped portion 34 and the rib-shaped portion 35 are arranged so as to be parallel to each other at a distance and orthogonal to the substrate accommodating portion 32 and the substrate accommodating portion 33. One ends of the substrate housing portion 32 and the substrate housing portion 33 facing each other are connected by a rib-shaped portion 34. The other ends of the substrate housing portion 32 and the substrate housing portion 33 facing each other are connected by a rib-like portion 35.

The rib-shaped portion 36 is disposed in parallel with the rib-shaped portion 34 and the rib-shaped portion 35. The rib-shaped portion 36 connects the substrate housing portion 32 and the substrate housing portion 33 to each other between the rib-shaped portion 34 and the rib-shaped portion 35.

The rib portions 34 to 36 extend linearly from the substrate housing portion 32 along the extending direction of the first needle electrode 41 and the third needle electrode 43. The rib portions 34 to 36 extend linearly from the substrate housing portion 33 along the extending direction of the second needle electrode 42 and the fourth needle electrode 44.

The induction electrode 45 protrudes from the surface 51 a of the substrate 51 toward the inside of the rib-shaped portion 36. The leading end portion of the induction electrode 45 is accommodated in the exterior case 31 (rib-shaped portion 36). By accommodating the induction electrode 45 in the outer case 31 made of an insulating resin material, the amount of ions recovered and disappeared by the induction electrode 45 can be reduced. The induction electrode 45 may have a plate shape or a rod shape in addition to the illustrated needle shape.

The wiring 56 is routed from the substrate housing portion 32 to the substrate housing portion 33 through the inside of the rib-shaped portion 35. The wiring 57 is routed from the substrate housing portion 32 toward the substrate housing portion 33 through the inside of the rib-shaped portion 34. The wiring 56 is routed so as to pass through one of the rib-like portion 34 and the rib-like portion 35, and the wiring 57 is routed so as to pass either one of the rib-like portion 34 and the rib-like portion 35. Yes.

A hollow space 38 is formed inside the outer case 31 surrounded by the substrate housing portion 32, the rib-shaped portion 35, the substrate housing portion 33 and the rib-shaped portion 34. The space 38 is formed in a shape penetrating the outer case 31 in the direction perpendicular to the paper surface in FIGS. 2 and 5, that is, in the vertical direction in FIGS. 3, 4, 6 and 7.

The exterior case 31 has an outer surface 31 s, and a part of the outer surface 31 s constitutes a first wall surface 37 and a second wall surface 39 that faces the first wall surface 37. The first wall surface 37 is formed in the substrate housing portion 32, and the second wall surface 39 is formed in the substrate housing portion 33. The first wall surface 37 and the second wall surface 39 constitute a part of the periphery of the space 38. The first wall surface 37 and the second wall surface 39 define a space 38 between the

substrate housing portions

32 and 33. The space 38 is formed between the first wall surface 37 and the second wall surface 39. A pair of first wall surface 37 and second wall surface 39 facing each other is provided facing the space 38. The substrate 51 accommodated in the substrate accommodating portion 32 is arranged so that the surface 51 a faces the space 38. The substrate 52 accommodated in the substrate accommodating portion 33 is arranged so that the surface 52 a faces the space 38.

The tips of the first to fourth needle electrodes 41 to 44 extending from the

substrates

51 and 52 are arranged in the space 38. The needle tips of the first needle-like electrode 41 and the third needle-like electrode 43 protrude from the first wall surface 37 to the outside of the outer case 31 and are arranged side by side in the space 38. The needle tips of the second needle-like electrode 42 and the fourth needle-like electrode 44 protrude from the second wall surface 39 to the outside of the outer case 31 and are arranged side by side in the space 38. The needle tips of the first needle-like electrode 41 and the second needle-like electrode 42 are disposed in the space 38 between the rib-like portion 34 and the rib-like portion 36, and the third needle-like electrode 43 and the fourth needle-like electrode 43 The needle tip of the needle electrode 44 is disposed in a space 38 between the rib-like portion 36 and the rib-like portion 35.

The rib-like portion 36 partitions the first and third needle-

like electrodes

41 and 43 that generate ions having different polarities, and similarly partitions the second and fourth needle-

like electrodes

42 and 44. ing. The rib-like portion 36 has a function as a partition plate that partitions between two adjacent needle-like electrodes. The rib-shaped portion 36 constitutes a part of the outer case 31 and is formed of an insulating resin material. Since the rib-like portion 36 spatially blocks between the two needle-like electrodes that generate ions having different polarities, it is possible to suppress neutralization of positive ions and negative ions having different polarities to reduce the ion concentration. Yes.

The first wall surface 37 is formed with an opening that penetrates the outer case 31 in the thickness direction, and the opening communicates with the internal space of the substrate housing portion 32 and the space 38. The first needle-like electrode 41 and the third needle-like electrode 43 are disposed so as to penetrate the opening formed in the first wall surface 37 and project the tip into the space 38. An opening that penetrates the outer case 31 in the thickness direction is formed in the second wall surface 39, and the opening communicates the internal space of the substrate housing portion 33 with the space 38. The second needle-like electrode 42 and the fourth needle-like electrode 44 are disposed so as to penetrate the opening formed in the second wall surface 39 and project the tip into the space 38.

Air is ventilated through the space 38. The outer case 31 defines a part of the air flow path. Ions generated by the discharge electrode 40 are transported by air flowing through the space 38. The space 38 constitutes a part of an air passage through which a gas for transporting ions generated by the first to fourth acicular electrodes 41 to 44 flows. The first wall surface 37 and the second wall surface 39 that define the outer edge of the space 38 constitute a part of the air path.

The air flowing through the space 38 is ventilated in the direction perpendicular to the paper surface in FIGS. 2 and 5, that is, in the vertical direction in FIGS. 3, 4, 6 and 7. The first to fourth needle-like electrodes 41 to 44 are arranged on the same plane perpendicular to the air flow direction in the space 38. The first to fourth needle-like electrodes 41 to 44 extend in a direction orthogonal to the direction of air flow in the space 38 and are arranged in parallel to each other.

The space 38 defined by the outer case 31 of the ion generator 26 constitutes a part of the air passage 10 shown in FIG. The space 38 communicates with the air passage 10 formed by the duct 15. The blower 16 blows gas into the space 38 included in the air passage 10. Air flowing through the air passage 10 in the duct 15 is passed through the space 38. The air flowing through the space 38 is vented in the upward direction in FIG.

When the air flows through the space 38, the ions generated by the discharge electrode 40 are transported by the air flow, and discharged from the air outlet to the indoor space via the air passage 10 shown in FIG. A structure that prevents the ventilation of the first to fourth needle-like electrodes 41 to 44 is not arranged on the windward and leeward sides of the first to fourth needle-like electrodes 41 to 44 protruding into the space 38. As described above, the electric device 100 is provided. Positive ions P and negative ions N (see FIG. 1) generated by the first to fourth needle-like electrodes 41 to 44 are discharged from a blow-out opening in which the duct 15 opens to the outside. Ions generated by the first to fourth needle-like electrodes 41 to 44 arranged in parallel in the air passage 10 are transported by air and diffused over a wide area, and high-concentration positive ions and negative ions are spread over a wide range. It comes to exist.

The ion generator 26 further includes a power supply connector 46. The power feeding connector 46 is provided in the board housing portion 32 that houses the high voltage generation circuit portion 53. The power supply connector 46 is provided as a power supply unit for supplying power to the high voltage generation circuit unit 53.

FIG. 8 is an enlarged view of the vicinity of the discharge electrode 40 in the ion generator 26 of the first embodiment. As shown in detail in FIG. 8, substrate 50 is provided in a flat plate shape, and has one main surface 50a and one main surface 50a and the other main surface 50b on the opposite side. . Conductive pattern 511 made of a conductive material such as copper is formed on one main surface 50a. Conductor pattern 512 made of a conductive material such as copper is formed on the other main surface 50b. The substrate 50 is a double-sided substrate in which a conductor pattern is formed on both one main surface 50a and the other main surface 50b.

The substrate 50 is also formed with a through hole 50h that penetrates the substrate 50 in the thickness direction from one main surface 50a to the other main surface 50b. The inner wall surface of the through hole 50h is covered with a conductor layer 520. The substrate 50 has a conductor layer 520 that covers the inner wall surface of the through hole 50h. The conductor layer 520 is formed by plating. The conductor layer 520 reaches from one main surface 50a of the substrate 50 to the other main surface 50b and penetrates the substrate 50 in the thickness direction.

The conductor pattern 511 formed on one main surface 50a includes a land 521. The land 521 is formed so as to surround the periphery of the opening in which the through hole 50h opens on one main surface 50a. Conductive pattern 512 formed on the other main surface 50 b includes land 522. The land 522 is formed so as to surround the periphery of the opening in which the through hole 50h opens on the other main surface 50b. Conductive layer 520 is electrically connected to land 521 on one main surface 50a, and electrically connected to land 522 on the other main surface 50b. The substrate 50 is a through-hole substrate in which a conductor is formed inside the through hole 50h and the conductor patterns on both main surfaces are electrically connected. The through hole 50h is formed as a through hole via.

The discharge electrode 40 is inserted into the through hole 50 h of the substrate 50. The discharge electrode 40 is disposed through the through hole 50h. The discharge electrode 40 has a distal end 40a and a proximal end 40b. The tip 40 a of the discharge electrode 40 protrudes from one main surface 50 a of the substrate 50. The base end 40 b of the discharge electrode 40 protrudes from the other main surface 50 b of the substrate 50. Either one of the

wirings

56 and 57 shown in FIGS. 5 to 7 is connected to the base end 40 b of the discharge electrode 40, whereby a high voltage generated by the high voltage generation circuit unit 53 is applied to the discharge electrode 40.

The molding material 61 is provided only on the other main surface 50 b side with respect to the substrate 50. The molding material 61 is provided in contact with the other main surface 50b, and covers the through hole 50h from the other main surface 50b side. The molding material 61 seals the base end 40 b of the discharge electrode 40 protruding from the other main surface 50 b of the substrate 50.

A blocking material 62 is provided at the root of the discharge electrode 40 that protrudes from the main surface 50 a of the substrate 50. The closing material 62 of the first embodiment is a solder material. The blocking material 62 is provided on one main surface 50 a of the substrate 50 so as to surround the entire circumference of the discharge electrode 40, and electrically connects the discharge electrode 40 and the land 521. The blocking material 62 is provided on the other main surface 50 b of the substrate 50 so as to surround the entire circumference of the discharge electrode 40, and electrically connects the discharge electrode 40 and the land 522.

The closing material 62 enters the inside of the through hole 50h and is provided through the substrate 50. The closing material 62 closes a minute gap G between the conductor layer 520 and the surface of the discharge electrode 40 inside the through hole 50h, and electrically connects the discharge electrode 40 and the conductor layer 520. Yes. The blocking material 62 is provided so as to contact the discharge electrode 40 and to contact the conductor layer 520 and lands 521 and 522 formed on the surface of the substrate 50.

The blocking material 62 is formed by fixing the discharge electrode 40 to the substrate 50 using solder. In a state where the discharge electrode 40 is disposed so as to penetrate the through hole 50h, the molten solder is poured into the through hole 50h, and then the solder is cooled and cured. As a result, the discharge electrode 40 is fixed to the substrate 50, and the closing material 62 that closes the gap G between the discharge electrode 40 and the conductor layer 520 is provided.

FIG. 9 is a circuit diagram showing a configuration of the ion generator 26 of the first embodiment. As shown in FIG. 9, in addition to the first to fourth needle-like electrodes 41 to 44 and the induction electrode 45, the ion generator 26 includes terminals T1 and T2, a booster circuit 90, a booster transformer 91, and

diodes

92 and 93. , Capacitors 94 and 95. The step-up circuit 90, step-up transformer 91,

diodes

92 and 93, and capacitors 94 and 95 are included in the configuration of the high voltage generation circuit unit 53 shown in FIG.

The booster circuit 90 includes a diode, a resistance element, an NPN bipolar transistor, and the like as appropriate. Step-up transformer 91 includes a primary winding 91a and a secondary winding 91b. The

diodes

92 and 93 and the capacitors 94 and 95 are provided for rectification. One end of the secondary winding 91b is electrically connected to the first to fourth needle electrodes 41 to 44. The other end of the secondary winding 91b is electrically connected to the induction electrode 45.

The step-up transformer 91 generates a positive or negative high voltage applied to each of the first to fourth needle-like electrodes 41 to 44. When a voltage is applied between the terminals T1 and T2, a positive high voltage pulse is applied to the first needle electrode 41 and the fourth needle electrode 44 via the diode 92, and a negative voltage is applied via the diode 93. A high voltage pulse is applied to the second acicular electrode 42 and the third acicular electrode 43. As a result, corona discharge is generated between the needle tips of the first to fourth needle-like electrodes 41 to 44 and the induction electrode 45, and the first needle-like electrode 41 and the fourth needle-like electrode 44 are positive ions. The second acicular electrode 42 and the third acicular electrode 43 generate negative ions.

A single step-up transformer 91 can apply a high voltage to each of the first to fourth needle-like electrodes 41 to 44, and the number of high voltage generation circuits can be kept to a minimum. It is possible to reduce the manufacturing cost of the ion generator 26 and to reduce the power consumption of the ion generator 26. By reducing the number of induction electrodes 45 in accordance with the number of high voltage generation circuits, the efficiency of ion generation can be improved, and ions generated by the first to fourth needle-like electrodes 41 to 44 can be induced. It is possible to suppress the reduction of the ion concentration by being recovered by the above, and it is possible to generate a higher concentration of ions.

A positive ion is a cluster ion in which a plurality of water molecules are attached around a hydrogen ion (H ⁺ ), and is represented as H ⁺ (H ₂ O) m (m is an arbitrary integer of 0 or more). A negative ion is a cluster ion in which a plurality of water molecules are attached around an oxygen ion (O ₂ ⁻ ), and is represented as O ₂ ⁻ (H ₂ O) n (n is an arbitrary integer of 0 or more). When positive ions and negative ions are released, both ions surround mold fungi and viruses floating in the air and cause a chemical reaction with each other on the surface. Suspended fungi and the like are removed by the action of the active species hydroxyl radical (.OH) generated at that time.

FIG. 10 is a schematic diagram illustrating a first example of the relationship between the ion generator 26 and the air passage 10 according to the first embodiment. FIG. 11 is a schematic diagram illustrating a second example of the relationship between the ion generator 26 and the air passage 10 according to the first embodiment. In FIGS. 10 and 11, the hatched portion indicates the air passage 10.

As described above, the air passage 10 formed in the duct 15 of the electric device 100 includes the space 38 defined by the outer case 31 of the ion generator 26. As the relationship between the space 38 and the air passage 10, for example, as shown in FIG. 10, the outer shape of the air passage 10 and the outer shape of the space 38 may be formed equal. That is, a configuration in which all of the air passing through the duct 15 passes through the space 38 may be adopted. Alternatively, as illustrated in FIG. 11, the outer shape of the air passage 10 may be larger than the outer shape of the space 38, and typically, the outer shape of the air passage 10 may be larger than the outer shape of the exterior case 31. In other words, only a part of the air passing through the duct 15 may pass through the space 38.

According to the present embodiment, the ion generator 26 that can supply high-concentration ions suitable for each air passage size can be produced at a lower cost.

(Embodiment 2)
FIG. 12 is a plan view showing the internal structure of the ion generator 26 of the second embodiment. Compared with the ion generator 26 of Embodiment 1 shown in FIG. 5, in the ion generator 26 of Embodiment 2 shown in FIG. 12, the range in which the molding material 61 is provided is reduced. Specifically, in the first embodiment shown in FIG. 5, the entire space surrounded by the substrate 52 and the substrate support case 55 is filled with the molding material 61, whereas the substrate support of the second embodiment is used. The case 55 has a protruding portion 55 p that protrudes toward the substrate 52. The protrusion 55p is formed in a shape surrounding the entire circumference of the through hole through which the discharge electrode 40 (needle electrodes 42, 44) is inserted. The molding material 61 is filled in a space defined by the surface 52b of the substrate 52 and the protrusion 55p.

The molding material 61 provided in this manner has a function of sealing the through-hole formed in the substrate 52 and the discharge electrode 40 from the surface 52b side of the substrate 52, as in the first embodiment. Since the required amount of the molding material 61 can be reduced as compared with the first embodiment, the material cost and processing cost of the ion generator 26 can be suppressed.

Instead of the configuration shown in FIGS. 5 and 12 in which the single substrate support case 55 covers both the two contacts of the second and fourth needle-

like electrodes

42 and 44 and the

wirings

56 and 57, A case covering the contact point between the needle-like electrode 42 and the wiring 56 and a case covering the contact point between the fourth needle-like electrode 44 and the wiring 57 may be provided separately.

(Embodiment 3)
FIG. 13 is an enlarged view of the vicinity of the discharge electrode 40 in the ion generator 26 of the third embodiment. In the ion generator 26 of Embodiment 1 shown in FIG. 8, the substrate 50 is a double-sided substrate, and the blocking material 62 is in the thickness direction of the substrate 50 from one main surface 50a of the substrate 50 to the other main surface 50b. The gap G between the conductor layer 520 and the discharge electrode 40 covering the through hole 50h formed in the substrate 50 is closed. Instead of this configuration, as shown in FIG. 13, the substrate 50 is a single-sided substrate in which the conductor pattern 512 is formed only on the other main surface 50 b, and the one main surface 50 a of the substrate 50 and the discharge electrode 40 You may provide the obstruction | occlusion material 62 which obstruct | occludes the clearance gap G between them.

The conductor pattern 512 includes a land 522 made of a conductive material such as copper. The land 522 is formed so as to surround the periphery of the opening in which the through hole 50h opens on the other main surface 50b. On the other main surface 50 b of the substrate 50, a conductive portion 530 made of a conductive material is provided between the land 522 and the discharge electrode 40. The ion generator 26 of Embodiment 3 includes a conductive portion that electrically connects the conductor pattern 512 formed on the other main surface 50 b of the substrate 50 and the discharge electrode 40.

The plugging material 62 of Embodiment 3 is various resin coating materials excellent in water repellency, withstand voltage, or mechanical strength, represented by a fluorine resin coating material. The conductive portion 530 of the third embodiment is a solder material. Also with this configuration, the gap G between the substrate 50 and the discharge electrode 40 can be reliably closed by the closing material 62.

When manufacturing the ion generator 26 of Embodiment 3 having the configuration shown in FIG. 13, the discharge electrode 40 is disposed in a state in which the discharge electrode 40 is disposed so as to penetrate the through hole 50h formed in the substrate 50. 40 is soldered to the land 522 to fix the discharge electrode 40 to the substrate 50. At this time, the solder material does not enter the through hole 50h because the solder material only rests on the land 522 formed on the other main surface 50b of the substrate 50. Thereafter, the melted resin material is poured from the one main surface 50a side, and the resin material is cured, whereby the blocking material 62 is formed. At this time, a part of the resin material enters the inside of the through-hole 50h. However, as shown in FIG. 13, there may be a cavity between the blocking material 62 and the conductive portion 530, or there may be a cavity. obtain.

(Embodiment 4)
FIG. 14 is a plan view showing the internal structure of the ion generator 26 of the fourth embodiment. In the ion generator 26 according to the fourth embodiment shown in FIG. 14, the substrate 52 and the substrate support case 55 that constitute the electrode unit are the same as the ion generator 26 according to the first embodiment described with reference to FIG. The space defined by the above is filled with the molding material 61, and the surface 52b side of the substrate 52 is sealed. In addition, in the ion generator 26 of the fifth embodiment, the mold material 61 is filled in the space defined by the substrate 51 and the substrate support case 54 constituting the power supply unit, and the surface 51b side of the substrate 51 is sealed. It has been stopped.

Further, as in the first embodiment, the substrate 51 is provided as a through-hole substrate, and includes first and third needle-

like electrodes

41 and 43 that are inserted through through-holes that penetrate the substrate in the thickness direction. A blocking material 62 is provided between the conductor layer covering the inner wall surface of the hole. The closing material 62 is provided so as to surround the entire circumferences of the first and third needle-

like electrodes

41 and 43 on the

surfaces

51a and 51b of the substrate 51 and inside the through-hole vias. The blocking material 62 is provided so as to contact the first and third needle-

like electrodes

41 and 43 and to contact lands on the

surfaces

51 a and 51 b of the substrate 51. The closing material 62 closes the gap between the substrate 51 and the first and third needle-

like electrodes

41 and 43.

(Embodiment 5)
FIG. 15 is a plan view showing the internal structure of the ion generator 26 of the fifth embodiment. In the ion generator 26 of the embodiments so far, the outer case 31 is provided so as to surround the space 38, and a plurality of ions are emitted to the space 38 from both sides of the first wall surface 37 and the second wall surface 39 facing each other. Needle-like electrodes were provided. Instead of this configuration, the first wall surface 37 and the second wall surface 39 may be formed as the same wall surface facing the space 38. That is, in the fifth embodiment, as shown in FIG. 15, the planar first wall surface 37 and the planar second wall surface 39 form the same plane.

The first needle-like electrode 41 is mounted on the substrate 51 of the power supply unit, and the third needle-like electrode 43 is not provided. The electrode unit includes one electrode unit including the second needle-like electrode 42 (left side in FIG. 15) and the other electrode unit including the fourth needle-like electrode 44 (right side in FIG. 15). And divided into two. One high voltage generation circuit unit 53 provided in the power supply unit is electrically connected to the second needle electrode 42 via a wiring 56, and is connected to the fourth needle electrode 44 via a wiring 57. Electrically connected.

A first needle electrode 41 and an induction electrode 45 mounted on the substrate 51 are provided so as to protrude from the first wall surface 37 to the space 38. The second and fourth

acicular electrodes

42 and 44 mounted on the

substrates

52 and 52 are provided so as to protrude from the second wall surface 39 to the space 38, respectively. The

acicular electrodes

41, 42, 44 and the induction electrode 45 protrude from the same plane and are exposed in the space 38.

The first needle electrode 41 may be configured to release either positive ions or negative ions. At least one of the second and fourth

acicular electrodes

42 and 44 generates ions having a polarity different from the ions generated by the first acicular electrode 41. For example, when the first needle-shaped electrode 41 generates positive ions, both the second and fourth needle-shaped

electrodes

42 and 44 may generate negative ions, or the second and fourth needle-shaped electrodes. One of the

electrodes

42 and 44 may generate negative ions and the other may generate positive ions.

It is as follows when the structure and effect of each embodiment demonstrated above are demonstrated collectively. In addition, although a reference number is attached | subjected to the structure of embodiment, this is an example.

The ion generator 26 includes a discharge electrode 40 and a substrate 50. The discharge electrode 40 has a tip 40a, and ions are generated from the tip 40a by discharge. The substrate 50 has one main surface 50a and the other main surface 50b. The substrate 50 is formed with a through hole 50h penetrating from one main surface 50a to the other main surface 50b. The discharge electrode 40 is inserted into the through hole 50 h of the substrate 50. The tip 40a of the discharge electrode 40 protrudes from one main surface 50a. The ion generator 26 further includes a molding material 61 and a closing material 62. The molding material 61 is provided only on the other main surface 50 b side with respect to the substrate 50, and covers the through hole 50 h of the substrate 50. The closing material 62 closes the gap G between the substrate 50 and the discharge electrode 40.

In this way, the space on the other main surface 50 b side is filled with the mold material 61 with respect to the through hole 50 h of the substrate 50, and the gap G between the substrate 50 and the discharge electrode 40 is further closed by the blocking material 62. It is blocked. By closing the gap G, it is possible to eliminate a gap through which moisture including dust can enter, so that creeping discharge on the

main surfaces

50a and 50b of the substrate 50 can be suppressed even under high humidity, and abnormal discharge and leakage are generated. Can be suppressed. Therefore, the ion generator 26 can supply high-concentration ions without causing a decrease in output even under high humidity. Furthermore, since a special manufacturing process and additional materials are not required, the ion generator 26 having high moisture resistance can be provided at a lower cost.

In addition to the configuration in which the molding material 61 is provided on the other main surface 50 b side of the substrate 50 shown in FIG. 5, a molding material is also provided on the one main surface 50 a side of the substrate 50. Even if the main surface is sealed with the molding material 61, the gap G between the substrate 50 and the discharge electrode 40 can be closed. In this case, since both sides of the substrate 50 are sealed, moisture including dust does not enter, and the occurrence of a leak phenomenon can be prevented. However, in order to provide the molding material on both main surfaces of the substrate 50, a casing for receiving the molding material is required. For example, it is necessary to provide a rib that extends in the thickness direction of the substrate 50 and surrounds the through hole 50h formed in the substrate 50, and fills the inside of the rib with a molding material so that the molding material does not leak. In this case, the size of the ion generator in the direction in which the discharge electrode extends increases, and the ion generator cannot be reduced in size.

On the other hand, like the ion generator 26 of the embodiment, only the other main surface 50b of the substrate 50 is filled with the molding material 61, and the one main surface 50a is not molded and exposed to the outside. Then, the dimension corresponding to the mold material on the one main surface 50a side of the substrate 50 can be reduced. Therefore, since the thinning in the extending direction of the discharge electrode 40 can be realized, the ion generator 26 can be reduced in size. In the case of a configuration in which only one surface of the substrate 50 is sealed with the molding material 61, there is a possibility of occurrence of a leakage phenomenon, but in the ion generator 26 of the embodiment, the gap G is completely blocked with the closing material 62. As a result, the occurrence of leakage can be reliably suppressed and moisture resistance can be ensured.

Preferably, the substrate 50 is a double-sided substrate in which

conductor patterns

511 and 512 are formed on both the one main surface 50a and the other main surface 50b. The substrate 50 has a conductor layer 520 that covers the inner wall surface of the through hole 50h. The closing material 62 penetrates the substrate 50 and closes the gap G between the conductor layer 520 and the discharge electrode 40. In this case, the gap G between the substrate 50, which is a double-sided substrate, and the discharge electrode 40 is closed with a closing material 62, thereby eliminating a gap through which moisture containing dust can enter, and high-concentration ions even under high humidity. Can be realized.

Preferably, the substrate 50 is a single-sided substrate in which a conductor pattern 512 is formed only on the other main surface 50b. The ion generator 26 further includes a conductive portion 530 that electrically connects the conductor pattern 512 and the discharge electrode 40. The closing material 62 closes the gap G between the one main surface 10 a and the discharge electrode 40. In this case, the gap G between the substrate 50, which is a single-sided substrate, and the discharge electrode 40 is closed with a closing material 62, thereby eliminating a gap through which moisture including dust can enter, and high-concentration ions even under high humidity. Can be realized.

Preferably, one main surface 50a of the substrate 50 is disposed toward a space 38 that constitutes a part of an air passage through which a gas carrying ions generated by the discharge electrode 40 flows. The tip 40 a of the discharge electrode 40 is disposed in the space 38. In this way, ions are generated at the tip 40 a of the discharge electrode 40 protruding into the space 38, and the generated ions are carried by the gas flowing through the space 38. Therefore, it is possible to realize the ion generator 26 that can quickly discharge high-concentration ions generated at the discharge electrode 40 by blowing air.

Preferably, the ion generator 26 further includes a substrate support case 55 as a housing for holding the substrate 50. The molding material 61 is filled in a space defined by the substrate 50 and the substrate support case 55. Thereby, the space filled with the molding material 61 for sealing the other main surface 50b side of the substrate 50 is defined. It is also possible to reduce the amount of the required molding material 61 by appropriately setting the shape of the substrate support case 55 and reducing the volume of the space filled with the molding material 61.

Preferably, the ion generator 26 further includes a high voltage generation circuit unit 53 as a high voltage generation unit, wirings 56 and 57 as connection portions, and an outer case 31 as a second casing. The high voltage generation circuit unit 53 generates a high voltage to be applied to the discharge electrode 40. The

wirings

56 and 57 electrically connect the high voltage generation circuit unit 53 and the discharge electrode 40 (second and fourth needle electrodes 42 and 44). The outer case 31 houses a substrate support case 55, a high voltage generation circuit unit 53, and wirings 56 and 57. In this way, the high voltage elements including the discharge electrode 40, the high voltage generation circuit unit 53, and the

wirings

56 and 57 are accommodated and integrated in the outer case 31, and are provided as one unit. Thereby, the handleability of the ion generator 26 is improved and the user can handle the ion generator 26 easily. Moreover, since the user who handles the ion generator 26 can avoid touching a high voltage element directly, the safety | security of the ion generator 26 can be improved.

Preferably, the ion generator 26 further includes a high voltage generation circuit unit 53 as a high voltage generation unit, a substrate support case 54 as a first casing, and an exterior case 31 as a second casing. The substrate support case 54 holds the substrate 50 and the high voltage generation circuit unit 53. The outer case 31 houses a substrate support case 54. Thereby, it can be set as the structure which the high voltage generation circuit part 53 does not receive to the influence of humidity, and the abnormal discharge in the high voltage generation circuit part 53 can be suppressed. Further, the high voltage generation circuit unit 53 is accommodated in the substrate support case 54, the substrate support case 54 is accommodated in the exterior case 31, and the high voltage generation circuit unit 53 is accommodated in the double case. . By protecting the high voltage generating circuit unit 53 in a double manner, it is possible to avoid a user handling the ion generating device 26 from directly touching the high voltage generating circuit unit 53, thereby further improving the safety of the ion generating device 26. be able to.

The electric device 100 includes the ion generator 26 according to any one of the above aspects and the blower 16 that blows a gas that conveys ions generated by the discharge electrodes 40 of the ion generator 26. In this way, it is possible to provide the electric device 100 including the ion generator 26 that can generate ions with a high concentration in a wide range and is excellent in handling and safety. Since the ion generator 26 is provided as one unit, when the ion generator 26 is detachable from the electric device 100, the ion generator 26 can be easily replaced.

Hereinafter, embodiments of the present invention will be described. As Example 1, the discharge electrode 40 is mounted on the ion generator 26 of the first embodiment, that is, the substrate 50 in which the through hole 50h is formed, and the discharge electrode 40 protrudes from one main surface 50a of the substrate 50. The ion generator 26 was prepared in which the root portion of the substrate was covered with a solder material, and the substrate 50 functioning as the blocking material 62 and the solder material closed the gap G between the discharge electrodes 40. As a comparative example, an ion generator was prepared that had the same configuration as that of the ion generator 26 of the first embodiment, but differed only in that it did not have the blocking material 62.

A duct having a flow path with a width of 245 mm and a height of 150 mm was provided, and the ion generators of Examples and Comparative Examples were arranged in the duct. The first to fourth needle-like electrodes 41 to 44 were provided so that the needle tips protruded from the outer case 31 by 9.5 mm, respectively. The distance between the needle tip of the first needle electrode 41 and the needle tip of the second needle electrode 42, and the distance between the needle tip of the third needle electrode 43 and the needle tip of the fourth needle electrode 44 Each distance was 101 mm. The distance between the needle tip of the first needle electrode 41 and the needle tip of the third needle electrode 43, and the distance between the needle tip of the second needle electrode 42 and the needle tip of the fourth needle electrode 44. The intervals were 42 mm each.

The air was blown into the duct with a cross flow fan (not shown) so that the flow velocity was 5 m / s on the discharge electrode 40. The ion generator 26 is arranged with the outer case 31 standing in the duct 15 so that the air flowing through the duct penetrates the space 38. As a result, the first to fourth needle-like electrodes 41 to 44 are arranged so as to extend in a direction perpendicular to the air flow direction in the duct 15. The ion generator 26 was arranged in the duct 15 so as to be offset in the height direction. Specifically, it was arranged so that the axis connecting the first needle electrode 41 and the second needle electrode 42 was located at a position 18.5 mm from the inner wall on the bottom side of the duct 15.

Using the ion generator 26 of Example 1 and the ion generator according to the comparative example, it was 350 mm away from the electrode on the downstream side (downstream side) of the air flow flowing in the duct under two conditions of relative humidity of 40% and 80%. The ion concentration at the position was measured. Table 1 summarizes the negative ion concentration at one measurement point in the center in the width direction of the inner wall on the bottom surface side of the duct in Example 1 and the comparative example, with the measurement value at 40% relative humidity being 100%. .

As shown in Table 1, the negative ion concentration at one measurement point in the comparative example was reduced by 8% at 80% relative humidity compared to 40% relative humidity. On the other hand, in Example 1, the relative humidity increased by 2% at 80% relative to 40% relative humidity. From this result, in the ion generator 26 of Example 1, the moisture resistance is improved by covering the root portion of the discharge electrode 40 with the solder material, and a sufficient amount of ions equivalent to normal humidity can be obtained even under high humidity. It was confirmed that it could be supplied.

The ion generator 26 according to the second embodiment has the same configuration as that of the ion generator 26 according to the first embodiment, but only in that the root portion of the discharge electrode 40 is covered with a resin coating material instead of a solder material. In FIG.

After the ion generator 26 according to Example 2 was exposed to a high humidity environment for 96 hours, it was placed in the duct described in Example 1, and the ion concentration was measured under the same conditions as in Example 1. Table 2 summarizes the negative ion concentration at one measurement point at the center in the width direction of the inner wall on the bottom surface side of the duct in Example 2 with the measurement value before exposure to a high humidity environment as 100%. .

As shown in Table 2, in the ion generator 26 according to Example 2, even after being exposed to a high humidity environment for a long time, an ion concentration almost equal to that before the exposure was measured. From this result, the ion generator 26 of Example 2 is improved in moisture resistance and corrosion resistance by covering the base portion of the discharge electrode 40 with the resin coating material, and is used in a severe environment with high humidity. Even so, it was confirmed that a sufficient amount of ions equivalent to the normal environment could be supplied.

Although the embodiments of the present invention have been described above, the configurations of the embodiments may be combined as appropriate. In addition, it should be considered that the embodiments and examples disclosed this time are examples in all respects and are not restrictive. 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.

10 air passage, 12, 15 duct, 16 air blower, 26 ion generator, 31 outer case, 31s outer surface, 32, 33 substrate housing part, 34, 35, 36 rib-like part, 37 first wall, 38 space, 39 second wall surface, 40 discharge electrode, 40a tip, 40b proximal end, 41 first needle electrode, 42 second needle electrode, 43 third needle electrode, 44 fourth needle electrode, 45 induction Electrode, 46 power supply connector, 50, 51, 52 substrate, 50a, 50b main surface, 50h through hole, 51a, 51b, 52a, 52b surface, 53 high voltage generation circuit portion, 54, 55 substrate support case, 55p protrusion, 56, 57 wiring, 61 mold material, 62 blocking material, 90 boost circuit, 91 boost transformer, 91a primary winding, 91b secondary winding, 92 93 diodes, 94 and 95 capacitors, 100 electrical equipment, G gap, N negative ions, P positive ion, T1, T2 terminals.

Claims

A discharge electrode having a tip and generating ions from the tip by discharge;
A substrate having one main surface and the other main surface, and having a through-hole penetrating from the one main surface to the other main surface;
The discharge electrode is inserted through the through hole, and the tip protrudes from the one main surface,
Furthermore, a molding material that is provided only on the other main surface side with respect to the substrate and covers the through hole;
An ion generator comprising: a closing material that closes a gap between the substrate and the discharge electrode.
The substrate is a double-sided substrate in which a conductor pattern is formed on both the one main surface and the other main surface, and has a conductor layer covering an inner wall surface of the through hole,
The ion generating apparatus according to claim 1, wherein the closing material passes through the substrate and closes a gap between the conductor layer and the discharge electrode.
The substrate is a single-sided substrate in which a conductor pattern is formed only on the other main surface,
A conductive portion for electrically connecting the conductor pattern and the discharge electrode;
The ion generating apparatus according to claim 1, wherein the closing material closes a gap between the one main surface and the discharge electrode.
The one main surface is arranged facing an air path through which a gas carrying ions generated by the discharge electrode flows,
The ion generation device according to claim 1, wherein the tip is disposed in the air passage.
A housing for holding the substrate;
The ion generator according to any one of claims 1 to 4, wherein the mold material is filled in a space defined by the substrate and the casing.
A high voltage generator for generating a high voltage to be applied to the discharge electrode;
A connection part for electrically connecting the high voltage generation part and the discharge electrode;
The ion generator according to claim 5, further comprising a second casing that houses the casing, the high-voltage generation unit, and the connection unit.
A high voltage generator for generating a high voltage to be applied to the discharge electrode;
A first housing for holding the substrate and the high voltage generator;
The ion generator of any one of Claims 1-4 further provided with the 2nd housing | casing which accommodates the said 1st housing | casing.
An electric device comprising: the ion generator according to any one of claims 1 to 7; and a blower that blows a gas that conveys ions generated by a discharge electrode of the ion generator.