Discharge device

Abstract

The present application provides a kind of discharge device.The discharge device has a pair of electrodes, electrode substrate and cover part.A pair of electrodes is discharged by applying voltage.Electrode substrate is configured with a pair of electrodes.The cover part is opposite to the electrode substrate.A part of each of the pair of electrodes penetrates the cover part.There is no circuit substrate with circuit formed between the electrode substrate and the cover part.The cover part includes a main body part and a pair of openings configured in the main body part.A pair of electrodes passes through a pair of openings respectively.The main body part has a wall part extending in the direction intersecting with the electrode substrate.The wall part is configured between a pair of openings.

Description

Technical Field

[0001] This invention relates to a discharge device. Background Technology

[0002] A discharge device includes a housing, a substrate, a discharge generating part, and an insulating resin. The housing houses the substrate. One side of the housing is open. The substrate is equipped with the discharge generating part. The discharge generating part has a pair of needle electrodes. The pair of needle electrodes have a base end and a front end provided on the substrate. The front end protrudes from the insulating resin. The insulating resin covers the substrate and seals the opening.

[0003] However, in some ozone generating devices, it is impossible to prevent dust accumulation between electrodes. That is, there is a possibility that dust or other contaminants can create a leakage path for current. Therefore, it is difficult to suppress current leakage. Summary of the Invention

[0004] The technical problem to be solved by the present invention

[0005] The present invention was made in view of the above-mentioned problems, and its object is to provide a discharge device capable of suppressing current leakage.

[0006] Technical solutions for solving technical problems

[0007] According to one aspect of the invention, a discharge device includes a pair of electrodes, an electrode substrate, and a cover. The pair of electrodes discharge by applying a voltage. The electrode substrate is disposed on the pair of electrodes. The cover is opposite to the electrode substrate. A portion of each of the pair of electrodes penetrates through the cover. There is no circuit board with circuitry formed between the electrode substrate and the cover.

[0008] According to another aspect of the invention, a discharge device includes a pair of electrodes, an electrode substrate, and a cover. The pair of electrodes discharge by applying a voltage. The electrode substrate is disposed on the pair of electrodes. The cover is opposite to the electrode substrate. The cover includes a main body and a pair of openings disposed on the main body. The pair of electrodes are inserted into each of the pair of openings. The main body has an outer wall portion surrounding the pair of electrodes. The outer wall portion is opposite to the pair of electrodes in a direction intersecting the direction extending from the electrode substrate. There is no circuit board with circuitry formed between the electrode substrate and the cover.

[0009] According to another aspect of the invention, the discharge device includes electrodes, an electrode substrate, and a cover. The electrodes discharge by applying a voltage. The electrode substrate is disposed on the electrodes. The cover is opposite to the electrode substrate. A portion of each electrode penetrates through the cover. There is no circuit board with circuitry formed between the electrode substrate and the cover.

[0010] The discharge device according to the present invention can suppress current leakage. Attached Figure Description

[0011] Figure 1 This is a diagram illustrating a discharge device according to a first embodiment of the present invention.

[0012] Figure 2 It means Figure 1 The diagram shows the II-II section of the discharge device.

[0013] Figure 3 This is a diagram showing a discharge device of a first modified example of the first embodiment.

[0014] Figure 4 This is a diagram showing a discharge device of a second variation of the first embodiment.

[0015] Figure 5 This is a diagram showing a discharge device of a third variation of the first embodiment.

[0016] Figure 6 This is a diagram showing the discharge device of the fourth variation of the first embodiment.

[0017] Figure 7 This is a diagram showing the discharge device of the fifth variation of the first embodiment.

[0018] Figure 8 This diagram illustrates the discharge apparatus of the sixth variation of the first embodiment.

[0019] Figure 9 This is a diagram showing the discharge device of the seventh modified example in the first embodiment.

[0020] Figure 10 This is a diagram showing the discharge device of the eighth variation of the first embodiment.

[0021] Figure 11 This is a diagram showing the discharge device of the ninth modified example in the first embodiment. Detailed Implementation

[0022] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0023] In addition, in the figures, the same or equivalent parts are labeled with the same reference numerals and are not described repeatedly.

[0024] [First Implementation Method]

[0025] Reference Figure 1 and Figure 2 The discharge device 100 of the first embodiment of the present invention will be described. First, refer to... Figure 1 This describes the discharge device 100 of the first embodiment. Figure 1 This is a diagram showing the discharge device 100 according to the first embodiment. The discharge device 100 discharges and generates active groups. The active groups contain ions.

[0026] The discharge device 100 has a plurality of electrodes 19, a housing 1, and a cover 2. The plurality of electrodes 19 are discharged by applying a voltage. The plurality of electrodes 19 may be, for example, two electrodes 19. That is, the plurality of electrodes 19 may be, for example, a pair of electrodes 19. A portion of each of the pair of electrodes 19 penetrates the cover 2.

[0027] The pair of electrodes 19 are, for example, needle-shaped or brush-shaped electrodes. A high voltage is applied to the pair of electrodes 19, generating a corona discharge. That is, the pair of electrodes 19 discharge separately to generate ions.

[0028] For example, one of a pair of electrodes 19 releases positive ions by discharging. Positive ions are hydrogen ions (H+). + Cluster ions (H+) formed by the clustering of multiple water molecules around a group of water molecules. + (H2O) m (m is any positive number above zero). Furthermore, for example, one electrode 19 of a pair of electrodes 19 releases negative ions through discharge. Negative ions are oxygen ions (O... 2- Cluster ions (O) formed by the clustering of multiple water molecules around ) 2- (H2O) n (n is any positive number above zero).

[0029] When both positive and negative ions are released, the greater the interval between the electrode 19 that releases positive ions and the electrode 19 that releases negative ions, the greater the amount of ions released from each electrode 19.

[0030] The released positive and negative ions, for example, surround airborne mold, initiating a chemical reaction on the mold's surface. This chemical reaction generates reactive hydroxyl radicals (·OH). Furthermore, the mold is removed through the action of these hydroxyl radicals (·OH).

[0031] The housing 1 houses a portion of a pair of electrodes 19. The housing 1 is a box-shaped housing. The housing 1 is insulating. The housing 1 is, for example, formed of resin.

[0032] The cover 2 covers the portion of the housing 1 in which a pair of electrodes 19 are disposed. The cover 2 is insulating. The cover 2 is, for example, formed of resin.

[0033] Next, refer to Figure 2 Detailed description of the discharge device 100. Figure 2 It means Figure 1 A diagram of the discharge device 100 at section II-II. (See diagram for reference.) Figure 2As shown, the discharge device 100 also includes an electrode substrate 5, a circuit board 6, electronic components 7, a transformer 8, and a sealing material 9.

[0034] like Figure 2 As shown, the housing 1 houses the electrode substrate 5, the circuit board 6, the electronic components 7, the transformer 8, and the sealing material 9. The housing 1 is box-shaped with an opening 13. The housing 1 has a side wall portion 11 and a bottom wall portion 12.

[0035] The bottom wall portion 12 supports the side wall portion 11. A transformer 8 and electronic components 7 are disposed on the bottom wall portion 12. The side wall portion 11 surrounds the bottom wall portion 12. The side wall portion 11 extends from the bottom wall portion 12 toward the opening 13.

[0036] Electrode substrate 5 is provided with a pair of electrodes 19. Electrode substrate 5 is electrically connected to the pair of electrodes 19. Electrode substrate 5 is a so-called printed circuit board. Electrode substrate 5 is positioned closer to the opening 13 side than circuit board 6. Electrode substrate 5 is connected to transformer 8 via leads.

[0037] A circuit is formed on the circuit board 6. Specifically, the circuit board 6 has circuitry for electrical connection with the electrode board 5, the transformer 8, and the electronic component 7. More specifically, the circuit board 6 is electrically connected to the electrode board 5, the transformer 8, and the electronic component 7 via leads. The circuit board 6 is disposed between the electronic component 7 and the electrode board 5.

[0038] Electronic component 7 includes power terminals, diodes, resistors, transistors, capacitors, etc. The power terminals are connected to an external power source via leads.

[0039] Transformer 8 increases the voltage applied to a pair of electrodes 19.

[0040] The sealing material 9 is, for example, polyurethane resin or epoxy resin. The sealing material 9 cures, for example, over time. Alternatively, the sealing material 9 may be cured by temperature (heat) or light (ultraviolet light).

[0041] like Figure 2 As shown, the cover 2 is opposite to the electrode substrate 5. Furthermore, the circuit board 6 is not present in the space A between the electrode substrate 5 and the cover 2. For example, dust accumulation between the electrode substrate 5 and the cover 2, and between the circuit board 6, can be suppressed. Therefore, dust accumulation between the electrodes 19 can be suppressed. That is, the formation of current leakage paths can be suppressed. A leakage path refers to the path of leakage current that leaks through the part of the electronic circuit-like insulation. As a result, undesirable current leakage in the circuit due to dust or the like accumulating between the electrodes 19 can be suppressed.

[0042] The cover 2 covers the opening 13 of the receiving part 1. The cover 2 includes a main body 21 and a pair of openings 20. A pair of electrodes 19 pass through the pair of openings 20 respectively.

[0043] The main body 21 is opposite to the electrode substrate 5. Specifically, the main body 21 is opposite to the electrode substrate 5 in a state where it is separated from the electrode substrate 5.

[0044] The main body 21 has a wall portion 3 extending in a cross direction PD1 that intersects with the electrode substrate 5. The wall portion 3 is disposed between a pair of openings 20. In other words, the wall portion 3 is disposed between electrodes 19. Therefore, the distance along the surface of the main body 21 from electrode 19 to electrode 19 is lengthened due to the presence of the wall portion 3. As a result, a substance that reduces insulation performance adheres to the main body 21, and a longer time is required before a leakage path of current is formed between electrodes 19. Consequently, the time until a leakage path is formed can be delayed. Alternatively, the wall portion 3 can be integrally formed with the main body 21. Furthermore, the wall portion 3 can also be mounted on the main body 21 from the rear.

[0045] Ions generated by electrodes subjected to high voltage react with water molecules in the air, thereby generating, for example, ammonium nitrate. Ammonium nitrate is hygroscopic. Ammonium nitrate sometimes adheres to structures surrounding the electrodes. Due to its high hygroscopicity, moisture in the air conducts current. That is, because ammonium nitrate adheres to structures formed of insulators, the insulating properties of the structures are reduced. Moreover, by further adhering ammonium nitrate between electrodes, leakage paths of current can sometimes be formed. When leakage paths of current are formed, it is difficult for the discharge device to stably generate ions. However, in the discharge device 100 of this embodiment, since a wall portion 3 is formed in the main body portion 21, the distance along the surface of the main body portion 21 from electrode 19 to electrode 19 becomes longer. Therefore, a longer time is required before leakage paths of current are formed. As a result, the period during which stable ion generation is possible can be extended.

[0046] In addition, such as Figure 2 As shown, the main body 21 also includes a flat plate portion 22. The flat plate portion 22 extends along an extending direction PD2. The extending direction PD2 indicates the direction along the electrode substrate 5. That is, the flat plate portion 22 extends along the electrode substrate 5.

[0047] Furthermore, wall portion 3 includes a first wall portion 31. For example... Figure 2As shown, the first wall portion 31 is disposed on the plate portion 22 and extends in the first direction D1. The first direction D1 indicates the direction from the electrode substrate 5 toward the plate portion 22. That is, the distance along the surface of the main body portion 21 from electrode 19 to electrode 19 on the first direction D1 side is lengthened due to the presence of the first wall portion 31. Therefore, when a substance that reduces insulation performance adheres to the main body portion 21, the leakage path for the formation of current between electrodes 19 can be delayed. As a result, the period during which ions can be stably generated can be extended.

[0048] (First variation)

[0049] Next, refer to Figure 3 This section describes a first modification of the discharge device 100 according to the first embodiment. In this first modification, the arrangement of the wall portion 3 differs primarily from that of the first embodiment. Hereinafter, the differences between the first modification and this embodiment will be explained.

[0050] Figure 3 This is a diagram showing a first modified example of the discharge device 100 according to the first embodiment. The wall portion 3 includes a second wall portion 32. The second wall portion 32 is disposed on the flat plate portion 22. Figure 3 As shown, the second wall portion 32 extends along the second direction D2. The second direction D2 represents the direction from the plate portion 22 toward the electrode substrate 5. Therefore, the distance along the surface of the main body portion 21 from electrode 19 to electrode 19 on the second direction D2 side is lengthened due to the presence of the second wall portion 32. That is, when a material that reduces insulation performance adheres to the main body portion 21, the leakage path for the formation of current between electrodes 19 can be delayed. As a result, the period during which ions can be stably generated can be extended.

[0051] Furthermore, in the first variation, the second wall portion 32 extends from the flat plate portion 22 to abut against the electrode substrate 5. Therefore, the second wall portion 32 divides space A into a space on one electrode 19 side and a space on the other electrode 19 side. As a result, leakage paths for current forming between electrodes 19 can be suppressed in space A between the cover portion 2 and the electrode substrate 5.

[0052] (Second variation)

[0053] Next, refer to Figure 4 This section describes a second modification of the discharge device 100 according to the first embodiment. In this second modification, the arrangement of the wall portion 3 differs primarily from that of the first embodiment. The differences between the second modification and this embodiment will be explained below.

[0054] Figure 4 This is a diagram showing a second modified example of the discharge device 100 according to the first embodiment. (See diagram below.) Figure 4As shown, in the second variation, the wall portion 3 of the main body portion 21 includes a pair of wall portions 3 extending toward the second direction D2. The pair of wall portions 3 have a third wall portion 33 and a fourth wall portion 34.

[0055] The third wall portion 33 extends from the flat plate portion 22 toward the second direction D2. The third wall portion 33 is equivalent to an example of "a wall portion". The third wall portion 33 has an end portion 33A on the first direction D1 side and an end portion 33B on the second direction D2 side.

[0056] The fourth wall portion 34 extends from the flat plate portion 22 toward the second direction D2. The fourth wall portion 34 is opposite to the third wall portion 33. The fourth wall portion 34 is an example of "another wall portion". The fourth wall portion 34 has an end portion 34A on the first direction D1 side and an end portion 34B on the second direction D2 side.

[0057] The plate portion 22 has a first plate portion 221, a second plate portion 222, and a third plate portion 223. The first plate portion 221 extends along the extending direction PD2. The first plate portion 221 is disposed on the third direction D3 side of the third wall portion 33. The third direction D3 indicates the direction from the fourth wall portion 34 toward the third wall portion 33.

[0058] The first plate portion 221 extends from one of the pair of openings 20 toward the end 33A of the third wall portion 33 in a first direction D1. Specifically, the first plate portion 221 extends from the opening 20 in the third direction D3 to the end 33A of the third wall portion 33.

[0059] The second plate portion 222 extends along the extending direction PD2. The second plate portion 222 is disposed on the fourth direction D4 side of the fourth wall portion 34. The fourth direction D4 indicates the direction from the third wall portion 33 toward the fourth wall portion 34.

[0060] The second plate portion 222 extends from the other opening 20 of a pair of openings 20 toward the end 34A of the fourth wall portion 34 in the first direction D1. Specifically, the second plate portion 222 extends from the opening 20 in the fourth direction D4 to the end 34A of the fourth wall portion 34.

[0061] The third plate portion 223 extends along the extending direction PD2. Specifically, the third plate portion 223 extends from the third wall portion 33 to the fourth wall portion 34. More specifically, the third plate portion 223 extends from the end 33B of the third wall portion 33 in the second direction D2 to the end 34B of the fourth wall portion 34 in the second direction D2.

[0062] In other words, a recess is formed in the plate portion 22. The height of the first plate portion 221 in the intersecting direction PD1 is different from the height of the third plate portion 223 in the intersecting direction PD1. Furthermore, the height of the second plate portion 222 in the intersecting direction PD1 is different from the height of the third plate portion 223 in the intersecting direction PD1. Therefore, the distance along the surface of the first direction D1 from electrode 19 to the body portion 21 of electrode 19 becomes longer. Furthermore, the distance along the surface of the second direction D2 from electrode 19 to the body portion 21 of electrode 19 becomes longer. Therefore, when a material that reduces insulation performance adheres to the body portion 21, the leakage path for the formation of current between electrodes 19 can be delayed. As a result, the period during which ions can be stably generated can be extended.

[0063] (Third variation)

[0064] Next, refer to Figure 5 This section describes a third modification of the discharge device 100 according to the first embodiment. The main difference between the third modification and the first, first, and second embodiments of the discharge device 100 lies in the shape of the wall portion 3. Hereinafter, the differences between the third modification and the first, first, and second embodiments of the discharge device 100 will be explained.

[0065] Figure 5 This is a diagram showing the discharge device 100 of the third modified example. (As shown) Figure 5 As shown, in the third variation, the wall portion 3 of the main body 21 has a cylindrical shape. That is, the wall portion 3 includes a fifth wall portion 35 in a cylindrical shape. Specifically, the wall portion 3 includes a pair of fifth wall portions 35. The pair of fifth wall portions 35 respectively surround the periphery of the electrode 19. The pair of fifth wall portions 35 are, for example, cylindrical in shape.

[0066] A pair of fifth wall portions 35 extend along the intersecting direction PD1. Specifically, the fifth wall portions 35 extend in the first direction D1 and the second direction D2. That is, the fifth wall portions 35 inhibit the adhesion of hygroscopic substances such as ammonium nitrate to the plate portion 22 and the electrode substrate 5. Therefore, leakage paths for current to form on the electrode substrate 5 can be suppressed by the fifth wall portions 35. As a result, ions can be stably generated.

[0067] Furthermore, each of the pair of fifth wall portions 35 has an end portion 35A on the first direction D1 side and an end portion 35B on the second direction D2 side. Specifically, the fifth wall portion 35 has a first opening 20A on the first direction D1 side. Furthermore, the fifth wall portion 35 has a second opening 20B on the second direction D2 side. The second opening 20B is opposite to the electrode substrate 5.

[0068] The flat plate portion 22 is disposed between the end portion 35A on the first direction D1 side and the end portion 35B on the second direction D2 side. That is, the fifth wall portion 35 extends in the first direction D1 and the second direction D2.

[0069] (Fourth variation)

[0070] Next, refer to Figure 6 This section describes a fourth modification of the discharge device 100 according to the first embodiment. The main difference between this fourth modification and the first, second, and third embodiments of the discharge device 100 lies in the shape of the wall portion 3. Hereinafter, the differences between this fourth modification and the first, second, and third embodiments of the discharge device 100 will be explained.

[0071] Figure 6 This is a diagram showing the discharge device 100 of the fourth modified example. (As shown) Figure 6 As shown, in the fourth variation, the wall portion 3 of the main body 21 has a cylindrical shape. That is, the wall portion 3 includes a cylindrical sixth wall portion 36. Specifically, the wall portion 3 includes a pair of sixth wall portions 36. The pair of sixth wall portions 36 respectively surround the electrode 19. The pair of sixth wall portions 36 are, for example, cylindrical in shape.

[0072] Furthermore, the sixth wall portion 36 has an end portion 36A on the first direction D1 side and an end portion 36B on the second direction D2 side. Specifically, the sixth wall portion 36 has a first opening 20A on the first direction D1 side. Furthermore, the sixth wall portion 36 has a second opening 20B on the second direction D2 side. The second opening 20B is opposite to the electrode substrate 5.

[0073] Furthermore, the inner diameter of the cylindrical shape of the sixth wall portion 36 increases as it approaches the end 36A of the electrode 19 in the first direction D1. Therefore, it is possible to prevent the distance between the electrode 19 and the sixth wall portion 36 from increasing, thus preventing dust accumulation between them. As a result, it is possible to prevent dust between the electrode 19 and the sixth wall portion 36 from becoming a leakage path.

[0074] Specifically, such as Figure 6 As shown, the inner diameter of the first opening 20A is LA. On the other hand, the inner diameter of the second opening 20B is LB. The inner diameter LA of the first opening 20A is larger than the inner diameter LB of the second opening 20B.

[0075] Alternatively, the inner diameter of the portion of the sixth wall portion 36 extending from the plate portion 22 toward the first direction D1 can increase as it moves toward the first opening 20A. This prevents the distance between the electrode 19 and the sixth wall portion 36 from increasing, thus suppressing dust accumulation between them. Consequently, it prevents dust between the electrode 19 and the sixth wall portion 36 from becoming a leakage path. Furthermore, the inner diameter of the portion of the sixth wall portion 36 extending from the plate portion 22 toward the second opening 20B remains unchanged.

[0076] (Fifth variation)

[0077] Next, refer to Figure 7 This section describes a fifth modification of the discharge device 100 according to the first embodiment. The main difference in the fifth modification is that it includes the first wall portion 31 of the first embodiment, the second wall portion 32 of the first modification, the third wall portion 33 and the fourth wall portion 34 of the second modification, the fifth wall portion 35 of the third modification, and the sixth wall portion 36 of the fourth modification. Hereinafter, the differences between the fifth modification and the first, first, second, third, and fourth embodiments of the discharge device 100 will be explained.

[0078] Figure 7 This is a diagram showing a fifth variation of the discharge device 100 according to the first embodiment. The cover portion 2 includes a main body portion 21 and a pair of openings 20. A pair of electrodes 19 pass through the pair of openings 20 respectively. The main body portion 21 has a plurality of wall portions 3 and a plate portion 22. The plurality of wall portions 3 include a first wall portion 31, a second wall portion 32, a third wall portion 33, a fourth wall portion 34, a fifth wall portion 35, and a sixth wall portion 36. The plate portion 22 includes a first plate portion 221, a second plate portion 222, and a third plate portion 223.

[0079] In the fifth variation, the first plate portion 221 extends from the sixth wall portion 36 to the third wall portion 33. Specifically, the first plate portion 221 extends from between the end portion 36A and the end portion 36B of the sixth wall portion 36 extending in the third direction D3 to the end portion 33A of the third wall portion 33.

[0080] In the fifth variation, the second plate portion 222 extends from the fifth wall portion 35 to the fourth wall portion 34. Specifically, the second plate portion 222 extends from between the end portion 35A and the end portion 35B of the fifth wall portion 35 in the fourth direction D4 to the end portion 34A of the fourth wall portion 34.

[0081] In the fifth variation, the third plate portion 223 extends from the third wall portion 33 to the fourth wall portion 34. Specifically, the third plate portion 223 extends from the end 33B of the third wall portion 33 in the second direction D2 to the end 34B of the fourth wall portion 34 in the second direction D2.

[0082] In the fifth modification, the first wall portion 31 is disposed on the second plate portion 222 and extends along the first direction D1. The first wall portion 31 is disposed between the fourth wall portion 34 and the fifth wall portion 35. Therefore, when a substance that reduces insulation performance adheres to the second plate portion 222, the leakage path of current formed between the electrode 19 on the fourth direction D4 side and the electrode 19 on the third direction D3 side can be reduced. As a result, ions can be stably generated.

[0083] In the fifth modification, the second wall portion 32 is disposed on the third plate portion 223 and extends from the third plate portion 223 along the second direction D2. Specifically, the second wall portion 32 extends from the third plate portion 223 to abut against the electrode substrate 5. Therefore, the second wall portion 32 divides the space A into a space on the third direction D3 side and a space on the fourth direction D4 side. As a result, in the space A between the cover portion 2 and the electrode substrate 5, it is possible to suppress the formation of a current leakage path between the electrode 19 in the third direction D3 and the electrode 19 in the fourth direction D4.

[0084] Furthermore, the second wall portion 32 may also extend from the end portion 33B of the third wall portion 33. That is, the second wall portion 32 is continuous with the third wall portion 33. In other words, in the first direction D1, the second wall portion 32 may also be positioned to overlap with the third wall portion 33. Additionally, the second wall portion 32 may also extend from the end portion 34B of the fourth wall portion 34. That is, the second wall portion 32 is continuous with the fourth wall portion 34. In other words, in the first direction D1, the second wall portion 32 may also be positioned to overlap with the fourth wall portion 34.

[0085] In the fifth variation, the third wall portion 33 extends from the plate portion 22 toward the second direction D2. Specifically, the third wall portion 33 extends from the first plate portion 221 toward the second direction D2. More specifically, the third wall portion 33 extends from the first plate portion 221 to the third plate portion 223.

[0086] In the fifth variation, the fourth wall portion 34 extends from the plate portion 22 toward the second direction D2. The fourth wall portion 34 is opposite to the third wall portion 33. Specifically, the fourth wall portion 34 extends from the second plate portion 222 toward the second direction D2. More specifically, the fourth wall portion 34 extends from the second plate portion 222 to the third plate portion 223.

[0087] A recess is formed in the main body portion 21 via the third wall portion 33, the fourth wall portion 34, the first plate portion 221, the second plate portion 222, and the third plate portion 223. That is, the distance along the surface of the main body portion 21 from the electrode 19 in the third direction D3 to the electrode 19 in the fourth direction D4 increases in the first direction D1. Furthermore, the distance along the surface of the main body portion 21 from the electrode 19 in the third direction D3 to the electrode 19 in the fourth direction D4 also increases in the second direction D2. Therefore, when a substance that reduces insulation performance adheres to the main body portion 21, the leakage path of current formation between the electrode 19 in the third direction D3 and the electrode 19 in the fourth direction D4 can be delayed. As a result, the period during which ions can be stably generated can be extended.

[0088] In the fifth modification, the fifth wall portion 35 extends along the intersecting direction PD1. Specifically, the fifth wall portion 35 extends in the first direction D1 and the second direction D2. That is, the fifth wall portion 35 inhibits the adhesion of hygroscopic substances such as ammonium nitrate to the second plate portion 222 and the electrode substrate 5. Therefore, leakage paths of current forming on the cover portion 2 and the electrode substrate 5 can be suppressed by the fifth wall portion 35. As a result, ions can be stably generated.

[0089] In the fifth modification, the sixth wall portion 36 extends in the first direction D1 and the second direction D2. Specifically, the inner diameter of the cylindrical shape of the sixth wall portion 36 increases towards the end 36A of the electrode 19 in the first direction D1. Therefore, it is possible to prevent the distance between the electrode 19 and the sixth wall portion 36 from increasing, thus preventing dust accumulation between the electrode 19 and the sixth wall portion 36. As a result, it is possible to prevent dust between the electrode 19 and the sixth wall portion 36 from becoming a leakage path.

[0090] In the fifth modified discharge device 100, a first wall portion 31, a second wall portion 32, a third wall portion 33, a fourth wall portion 34, a fifth wall portion 35, and a sixth wall portion 36 are provided. Therefore, leakage paths of current forming on the cover portion 2 and the electrode substrate 5 can be suppressed, and leakage paths of current forming between electrodes 19 can be delayed. As a result, the period during which ions can be generated more stably can be extended.

[0091] (Sixth variation)

[0092] Next, refer to Figure 8 The sixth modification of the discharge device 100 of the first embodiment will be described below. The main difference in the sixth modification of the discharge device 100 is the presence of an outer wall portion 37. Hereinafter, the differences between the sixth modification of the discharge device 100 and the first embodiment, the first modification, the second modification, the third modification, and the fifth modification will be explained.

[0093] Figure 8This is a diagram showing the discharge device 100 of the sixth modification. The cover 2 of the sixth modification includes a main body 21 and a pair of openings 20. A pair of electrodes 19 pass through the pair of openings 20 respectively. The main body 21 has an outer wall 37 and a flat plate 22.

[0094] The outer wall portion 37 surrounds a pair of electrodes 19. The outer wall portion 37 is opposite to the electrodes 19 in a direction that intersects the direction in which the electrode substrate 5 extends. Therefore, when the discharge device 100 is installed in the device, water-absorbing substances such as ammonium nitrate are prevented from adhering to the device outside the discharge device 100. As a result, leakage paths can be prevented from forming on the circuit board of the device in which the discharge device 100 is installed.

[0095] Furthermore, specifically, the outer wall portion 37 extends in the first direction D1. Moreover, the outer wall portion 37 is formed on the outer side of the flat plate portion 22. That is, the outer wall portion 37 is disposed between the flat plate portion 22 and the receiving portion 1. Therefore, the flat plate portion 22 surrounds the outer wall portion 37.

[0096] (Seventh variation)

[0097] Next, refer to Figure 9 This section describes a seventh modification of the discharge device 100 according to the first embodiment. The difference between this seventh modification and the first, second, third, fourth, fifth, and sixth embodiments of the discharge device 100 lies in the shape of the flat plate portion 22. Hereinafter, the differences between this seventh modification and the first, first, second, third, fourth, fifth, and sixth embodiments of the discharge device 100 will be explained.

[0098] Figure 9 This is a diagram showing a seventh modified discharge device 100. The seventh modified discharge device 100 includes a plurality of electrodes 19, a housing portion 1, and a cover portion 2. The electrodes 19 discharge by applying a voltage. The housing portion 1 houses a portion of a pair of electrodes 19, an electrode substrate 5, a circuit board 6, electronic components 7, a transformer 8, and sealing material 9. The cover portion 2 covers the portion of the housing portion 1 in which the pair of electrodes 19 are disposed.

[0099] The cover 2 includes a main body 21 and a pair of openings 20. A pair of electrodes 19 pass through the pair of openings 20 respectively.

[0100] The main body 21 is positioned opposite the electrode substrate 5 in a state separate from it. The main body 21 has a flat plate portion 22. The flat plate portion 22 extends along the extending direction PD2.

[0101] The plate portion 22 has a wavy shape. Specifically, the wavy shape of the plate portion 22 is configured in the portion between a pair of openings 20 in the plate portion 22. That is, the distance along the surface of the plate portion 22 from one opening 20 to the other opening 20 is longer than that of a plate portion without a wavy shape. Therefore, time is required for the formation of a leakage path. Thus, the leakage path that forms a current between electrodes 19 can be delayed. As a result, the period during which ions can be stably generated can be extended.

[0102] (Eighth variation)

[0103] Next, refer to Figure 10 This section describes an eighth modification of the discharge device 100 according to the first embodiment. The main difference between the eighth modification and the first, first, second, third, fourth, fifth, sixth, and seventh modifications lies in the shape of the wall portion 3. Hereinafter, the differences between the eighth modification and the first, first, second, third, fourth, fifth, sixth, and seventh modifications will be explained.

[0104] Figure 10 This is a diagram showing the discharge device 100 of the eighth modified example. (As shown) Figure 8 As shown, in the eighth variation, the wall portion 3 of the main body 21 has a cylindrical shape. That is, the wall portion 3 includes a cylindrical seventh wall portion 38. Specifically, the wall portion 3 includes a pair of seventh wall portions 38. The pair of seventh wall portions 38 respectively surround the electrode 19. The pair of seventh wall portions 38 are, for example, cylindrical in shape.

[0105] A pair of seventh wall portions 38 extend along the intersecting direction PD1. Specifically, the seventh wall portions 38 extend in the first direction D1. More specifically, the seventh wall portions 38 extend from the plate portion 22 along the first direction D1. In other words, no wall portion 3 is disposed in the space A between the cover portion 2 and the electrode substrate 5. That is, the seventh wall portions 38 suppress the adhesion of hygroscopic substances such as ammonium nitrate to the plate portion 22. Therefore, leakage paths of current forming in the plate portion 22 can be suppressed by the seventh wall portions 38. As a result, ions can be stably generated.

[0106] (Ninth variation)

[0107] Next, refer to Figure 11This section describes a ninth modification of the discharge device 100 according to the first embodiment. The main difference between the ninth modification and the first, second, third, fourth, fifth, seventh, and eighth embodiments of the discharge device 100 is the presence of an outer wall portion 37. Hereinafter, the differences between the ninth modification and the first, second, third, fourth, fifth, seventh, and eighth embodiments of the discharge device 100 will be explained.

[0108] Figure 11 This is a diagram showing the discharge device 100 of the ninth modification. The cover 2 of the ninth modification includes a main body 21 and a pair of openings 20. A pair of electrodes 19 pass through the pair of openings 20 respectively. The main body 21 has a wall portion 3, an outer wall portion 37, and a flat plate portion 22.

[0109] The wall portion 3 includes a pair of seventh wall portions 38. The pair of seventh wall portions 38 respectively surround the periphery of the electrode 19. The pair of seventh wall portions 38 are, for example, cylindrical in shape. The pair of seventh wall portions 38 extend from the plate portion 22 along the first direction D1. In other words, the wall portion 3 is not disposed in the space A between the cover portion 2 and the electrode substrate 5.

[0110] The outer wall portion 37 extends in the first direction D1. Furthermore, the outer wall portion 37 is formed on the outer side of the flat plate portion 22. That is, the outer wall portion 37 is disposed between the flat plate portion 22 and the receiving portion 1. Therefore, the flat plate portion 22 surrounds the outer wall portion 37.

[0111] Furthermore, the outer wall portion 37 surrounds a pair of electrodes 19. The outer wall portion 37 is opposite to the electrodes 19 in a direction intersecting the direction in which the electrode substrate 5 extends. Therefore, when the discharge device 100 is installed in the device, water-absorbing substances such as ammonium nitrate are prevented from adhering to the device outside the discharge device 100. As a result, leakage paths can be prevented from forming toward the circuit board of the device on which the discharge device 100 is installed.

[0112] That is, the discharge device 100 of the ninth modification can suppress the leakage path of current formed on the plate portion 22 by a pair of seventh wall portions 38, and can suppress the leakage path formed toward the circuit board of the device on which the discharge device 100 is mounted by the outer wall portion 37.

[0113] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described above, and can be implemented in various ways without departing from its spirit. Furthermore, various inventions can be formed by appropriately combining the multiple constituent elements disclosed in the above embodiments. For example, several constituent elements may be deleted from all the constituent elements shown in the embodiments. Moreover, constituent parts relating to the first to sixth modifications may be appropriately combined. Furthermore, constituent parts relating to different embodiments may be appropriately combined. For ease of understanding, the accompanying drawings are schematically shown with each constituent element as the main body, and the thickness, length, number, spacing, etc. of each constituent element shown in the drawings differ from the actual figures for the convenience of drawing production. In addition, the speed, material, shape, size, etc. of each constituent element shown in the above embodiments are examples and are not particularly limited, and various changes can be made without substantially departing from the scope of the structure of the present invention.

[0114] (1) In the discharge device 100 of the first embodiment, the polarity of one electrode 19 in a pair of electrodes 19 is different from that of the other electrode 19 in the pair of electrodes 19, but it is not limited to this. For example, the pair of electrodes 19 may also have the same polarity.

[0115] (2) In the discharge device 100 of the first embodiment, the pair of electrodes 19 are needle-shaped or brush-shaped electrodes, but are not limited thereto. For example, one of the pair of electrodes 19 may also be a sensing electrode. The sensing electrode surrounds the needle electrode.

[0116] (3) The discharge device 100 of the first embodiment has a pair of electrodes 19, but is not limited thereto. For example, it may have a single electrode 19. Specifically, the discharge device 100 has electrodes 19, a housing 1, a cover 2, an electrode substrate 5, a circuit board 6, electronic components 7, a transformer 8, and a sealing material 9.

[0117] Electrode 19 discharges by applying voltage. A portion of electrode 19 penetrates the cover portion 2. The housing portion 1 houses a portion of electrode 19. The housing portion 1 houses electrode substrate 5, circuit board 6, electronic components 7, transformer 8, and sealing material 9. Electrode substrate 5 is equipped with electrode 19. The cover portion 2 covers the portion of housing portion 1 where electrode 19 is located. The cover portion 2 is opposite to electrode substrate 5. Furthermore, circuit board 6 is not present between electrode substrate 5 and cover portion 2. Therefore, dust accumulation between electrodes 19 can be suppressed. As a result, current leakage from electrodes 19 due to dust accumulation between electrodes 19 can be suppressed.

[0118] (4) In the first embodiment, the electrode substrate 5 of the discharge device 100 is provided with a sealing material 9 on the second direction D2 side, but the sealing material 9 may also be provided on the first direction D1 side of the electrode substrate 5. In this case, the cover 2 can prevent dust from accumulating on the encapsulation material 9 on the first direction D1 side of the electrode substrate 5.

[0119] (5) The main body 21 of the discharge device 100 in the first embodiment has a first wall portion 31, but is not limited thereto. For example, the main body 21 of the discharge device 100 may also have multiple first wall portions 31. By arranging multiple first wall portions 31 on the flat plate portion 22, the distance along the surface of the main body 21 from the opening 20 to the opening 20 becomes longer. Therefore, when a substance that reduces insulation performance adheres to the main body 21, the leakage path for forming current between electrodes 19 can be further delayed. As a result, the period during which ions can be generated more stably can be extended.

[0120] (6) The main body 21 of the discharge device 100 in the second variation of the first embodiment has a third wall portion 33 and a fourth wall portion 34, but is not limited thereto. For example, the main body 21 may also have multiple recesses. Specifically, the main body 21 of the discharge device 100 may also have multiple third wall portions 33 and multiple fourth wall portions 34. The plate portion 22 may also have multiple third plate portions 223. Therefore, by arranging multiple wall portions 3 in the plate portion 22, the distance along the surface of the main body 21 from the opening 20 to the opening 20 becomes longer. Therefore, when a substance that reduces insulation performance adheres to the main body 21, the leakage path for forming current between electrodes 19 can be further delayed. As a result, the period during which ions can be generated more stably can be extended.

[0121] (7) The plate portion 22 of the discharge device 100 in the seventh modification has a wave shape, but is not limited thereto. For example, the first plate portion 221 of the fifth modification of the first embodiment may also have a wave shape. Furthermore, the second plate portion 222 of the fifth modification of the first embodiment may also have a wave shape. Furthermore, the third plate portion 223 of the fifth modification of the first embodiment may also have a wave plate shape.

[0122] Industrial availability

[0123] This invention provides a discharge device that is industrially applicable.

[0124] Explanation of reference numerals in the attached figures

[0125] 2: Cover

[0126] 3: Wall

[0127] 5: Electrode substrate

[0128] 6: Circuit board

[0129] 13: Opening

[0130] 19: Electrode

[0131] 20: Opening

[0132] 21: Main body

[0133] 22: Flat Panel Section

[0134] 31: First wall section

[0135] 32: Second wall section

[0136] 33: Third wall section

[0137] 34: Fourth wall section

[0138] 35: Fifth wall section

[0139] 36: Sixth Wall Section

[0140] 37: Outer wall portion

[0141] 100: Discharge device

[0142] 221: First Flat Section

[0143] 222: Second flat section

[0144] 223: Third Flat Section

[0145] D1: First Direction

[0146] D2: Second Direction

[0147] LA: inner diameter

[0148] LB: Inner Diameter

Claims

1. A discharge device, characterized in that, It possesses: A pair of electrodes that discharge by applying a voltage; An electrode substrate having the pair of electrodes disposed thereon; and The cover portion is opposite to the electrode substrate. A portion of each of the pair of electrodes extends through the cover. There is no circuit board with circuitry formed between the electrode substrate and the cover portion. The cover includes a main body and a pair of openings disposed on the main body. The pair of electrodes pass through the pair of openings and penetrate the cover. The main body has a wall portion and a flat plate portion. The wall portion extends in a direction intersecting the electrode substrate, and the flat plate portion extends along the electrode substrate. The wall portion includes: A first wall portion, disposed between the pair of openings and on the plate portion, and extending in a first direction from the electrode substrate toward the plate portion; and A pair of second wall portions, disposed between the pair of openings and on the plate portion, and extending in a second direction from the plate portion toward the electrode substrate. The flat plate portion includes: A first flat plate portion extends from one of the pair of openings to the end of one of the pair of second wall portions on the first direction side; A second flat plate portion, which extends from the other opening of the pair of openings to the end of the other second wall portion of the pair of second wall portions on the first direction side; and A third plate portion extends from the end of one second wall portion in the second direction to the end of the other second wall portion in the second direction.

2. The discharge device according to claim 1, characterized in that, The second wall portion extends from the flat plate portion to abut against the electrode substrate.

3. The discharge device according to claim 1, characterized in that, The wall portion includes a cylindrical third wall portion that surrounds the electrode. The third wall portion extends in both the first and second directions.

4. The discharge device according to claim 3, characterized in that, The closer the end is to the first direction side of the electrode, the larger the inner diameter of the cylindrical shape of the third wall portion.

5. The discharge device according to any one of claims 1 to 4, characterized in that, The main body also has an outer wall portion surrounding the pair of electrodes. The outer wall portion is opposite to the pair of electrodes in the direction in which the electrode substrate extends.

6. A discharge device, characterized in that, It possesses: A pair of electrodes that discharge by applying a voltage; An electrode substrate having the pair of electrodes disposed thereon; and The cover portion is opposite to the electrode substrate. The cover includes a main body and a pair of openings disposed on the main body. The main body has a flat plate portion that extends along the electrode substrate. With the direction from the electrode substrate toward the flat plate portion designated as the first direction, one electrode of the pair of electrodes passes through one of the pair of openings and penetrates the cover portion, extending from the one opening along the first direction; the other electrode of the pair of electrodes passes through the other opening of the pair of openings and penetrates the cover portion, extending from the other opening along the first direction. There is no circuit board with circuitry formed between the electrode substrate and the cover portion. The main body includes a pair of cylindrical walls that extend from the openings toward the first direction and surround the corresponding electrode around its circumference.

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