CN111213295B

CN111213295B - Discharge device

Info

Publication number: CN111213295B
Application number: CN201880067228.9A
Authority: CN
Inventors: 冈野哲之; 江崎哲也; 大江信之
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2017-10-20
Filing date: 2018-02-20
Publication date: 2021-07-27
Anticipated expiration: 2038-02-20
Also published as: JPWO2019077771A1; TW201917969A; JP7029466B2; CN111213295A; TWI687008B; WO2019077771A1

Abstract

Discharge device (101) comprising: a case (4) that includes a first plate (41) disposed on a first side (81) and a second plate (42) disposed on a second side (82) opposite to the first side (81) so as to face the first plate (41) and including a first opening (61), and that defines an internal space (2) between the first plate (41) and the second plate (42); a base material (3) disposed in the internal space (2); a discharge electrode (5) which is held on the base material (3) and is disposed so that the front end portion thereof protrudes outside the case (4) through the first opening (61); and an insulating seal section (7) that seals the base material (3) in the internal space (2); the second plate (42) includes a second opening (62) in addition to the first opening (61), and the discharge electrode (5) does not penetrate the second opening (62).

Description

Discharge device

Technical Field

The present invention relates to a discharge device. The present application claims priority based on japanese patent application No. 2017-203485 filed for 10/20/2017. All the descriptions of the japanese patent application are incorporated herein by reference.

Background

An example of a structure in which electronic parts constituting a high-voltage generating circuit are resin-molded is disclosed in japanese patent laid-open No. 2012-252800 (patent document 1).

An ion generating device including a needle electrode is disclosed in japanese patent laid-open publication No. 2015-5387 (patent document 2).

An ion generating device including a discharge electrode is disclosed in japanese patent laid-open publication No. 2017-33883 (patent document 3). The discharge electrode includes a brush-like conductor.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2012-252800

Patent document 2: japanese patent laid-open publication No. 2015-5387

Patent document 3: japanese laid-open patent publication No. 2017-33883

Disclosure of Invention

Technical problem to be solved by the invention

Generally, as in the device disclosed in patent document 1, there are components including a circuit for generating a high voltage and to which a high voltage is applied. Such parts are molded from a polymer material or the like in order to prevent performance degradation due to abnormal discharge from occurring between the parts and the surroundings and to ensure safety. However, since the resin used as a polymer material shrinks during curing, a large amount of resin must be injected to reliably perform molding, which may hinder the miniaturization of the device. As a method for solving this problem, it is conceivable to cover a component to which a high voltage is applied with a case, but in this case, bubbles are less likely to escape to the surface. If air bubbles remain in the vicinity of the component to which the high voltage is applied, abnormal discharge may occur due to the air bubbles, and performance may be degraded. In particular, the corners of the box tend to trap air bubbles and must be considered particularly troublesome. In order to ensure the reliability of the discharge device and to achieve the miniaturization of the device, a structure is required in which a component to which a high voltage is applied is covered with a case and air bubbles are less likely to remain.

The invention aims to provide a discharge device which is not easy to remain bubbles in a box body.

Means for solving the problems

In order to achieve the above object, a discharge device according to the present invention includes: a case including a first plate disposed on a first side and a second plate disposed on a second side opposite to the first side, the second plate being disposed so as to face the first plate and including a first opening, an internal space being defined between the first plate and the second plate; a base material disposed in the internal space; a discharge electrode held by the base material and arranged so that a distal end portion thereof protrudes outside the case through the first opening, and an insulating seal portion sealing the base material in the internal space; the second plate includes a second opening portion in addition to the first opening portion, and the discharge electrode does not penetrate the second opening portion.

Effects of the invention

According to the present invention, since the bubbles can escape to the outside from not only the first opening but also the second opening, the discharge device in which the bubbles are less likely to remain inside the case can be provided.

Drawings

Fig. 1 is a perspective view of a discharge device according to embodiment 1 of the present invention.

Fig. 2 is a plan view of a discharge device according to embodiment 1 of the present invention.

Fig. 3 is a sagittal sectional view taken along line III-III of fig. 2.

Fig. 4 is a sagittal sectional view taken along line IV-IV of fig. 2.

Fig. 5 is a sagittal sectional view taken along line V-V of fig. 2.

Fig. 6 is a partial plan view of a discharge device according to embodiment 2 of the present invention.

Fig. 7 is a sagittal sectional view taken along line VII-VII of fig. 6.

Fig. 8 is a partial plan view of a first modification of the discharge device according to embodiment 2 of the present invention.

Fig. 9 is a partial plan view of a second modification of the discharge device according to embodiment 2 of the present invention.

Fig. 10 is a partial plan view of a third modification of the discharge device according to embodiment 2 of the present invention.

Fig. 11 is a partial plan view of a discharge device according to embodiment 3 of the present invention.

Fig. 12 is a sagittal sectional view taken along line XII-XII of fig. 11.

Fig. 13 is a sagittal sectional view taken along line XIII-XIII of fig. 11.

Fig. 14 is a partial plan view of a discharge device according to embodiment 4 of the present invention.

Fig. 15 is a sagittal sectional view taken along the XV-XV line of fig. 14.

Fig. 16 is a partial plan view of a discharge device according to embodiment 5 of the present invention.

Fig. 17 is a sagittal sectional view taken along line XVII-XVII of fig. 16.

Fig. 18 is a partial plan view of a discharge device according to embodiment 5 of the present invention.

Fig. 19 is a cross-sectional view of a first example of the second opening portion according to embodiment 6 of the present invention.

Fig. 20 is a cross-sectional view of a second example of the second opening portion according to embodiment 6 of the present invention.

Fig. 21 is a cross-sectional view of a third example of the second opening portion according to embodiment 6 of the present invention.

Fig. 22 is a cross-sectional view of a first example of a case according to embodiment 7 of the present invention.

Fig. 23 is a sectional view of a second example of the case according to embodiment 7 of the present invention.

Fig. 24 is a sectional view of a third example of the case according to embodiment 7 of the present invention.

Fig. 25 is a partial plan view of a first example of a case according to embodiment 8 of the present invention.

Fig. 26 is a sagittal sectional view taken along line XXVI-XXVI of fig. 25.

Fig. 27 is a partial plan view of a second example of the case according to embodiment 8 of the present invention.

Fig. 28 is a sagittal sectional view taken along line XXVIII-XXVIII of fig. 27.

Fig. 29 is a sagittal sectional view taken along line XXIX-XXIX of fig. 27.

Fig. 30 is a cross-sectional view of a discharge device according to embodiment 9 of the present invention.

Fig. 31 is a perspective view of a discharge device according to embodiment 10 of the present invention.

Fig. 32 is a cross-sectional view of a discharge device according to embodiment 10 of the present invention.

Detailed Description

(embodiment mode 1)

A discharge device according to embodiment 1 of the present invention will be described with reference to fig. 1 to 5. Fig. 1 shows an external appearance of a discharge device 101 according to the present embodiment. Fig. 2 shows a plan view of the discharge device 101. A sagittal sectional view relating to line III-III of fig. 2 is shown in fig. 3. A sagittal sectional view relating to line IV-IV of fig. 2 is shown in fig. 4. A sagittal sectional view relating to the line V-V of fig. 2 is shown in fig. 5.

The discharge device 101 includes a case 4, a base material 3, a discharge electrode 5, and an insulating seal portion 7. The case 4 includes a first plate 41 disposed on a first side 81, and a second plate 42 disposed on a second side 82 opposite to the first side 81 so as to face the first plate 41 and including a first opening 61. The case 4 defines an internal space 2 between the first plate 41 and the second plate 42. The base material 3 is disposed in the internal space 2. The discharge electrode 5 is held on the base 3, and is disposed so that its distal end portion protrudes outside the case 4 through the first opening 61. Here, the discharge electrode 5 is shown as a needle electrode as an example, but the discharge electrode 5 may be an electrode of another form. The insulating seal portion 7 seals the base material 3 in the internal space 2. The substrate 3 may be a substrate, for example, a printed wiring board. In fig. 3 to 5, various components and the like disposed on or near the surface of the base material 3 are not illustrated, but various components may be actually mounted on the surface of the base material 3. The second plate 42 includes a second opening 62 in addition to the first opening 61. The discharge electrode 5 does not penetrate the second opening 62.

In the present embodiment, since the second opening 62 is provided in addition to the first opening 61 through which the discharge electrode 5 penetrates, bubbles can escape to the outside from not only the first opening 61 but also the second opening 62 when the resin for forming the insulating seal portion 7 is injected. This makes it difficult for air bubbles to accumulate inside the case 4. Therefore, according to the present embodiment, it is possible to provide a discharge device in which bubbles are less likely to remain in the case 4.

The resin is injected from the first opening 61. The second opening 62 is an opening for the purpose of discharging bubbles. Although the present embodiment shows an example in which one second opening 62 is disposed at the center, the position, number, and size of the second opening 62 can be appropriately selected.

Since the second opening 62 is an opening for the purpose of discharging bubbles, it is preferable that not only the discharge electrode but also other kinds of members do not penetrate.

In the description so far, although the concept of "first plate" and "second plate" has been presented, the term "plate" as used herein is not limited to a flat plate, but includes a plate having irregularities, a plate having some or all of deformations such as bending, and the like. The term "plate-like portion" also means a portion including a plate-like portion and a non-plate-like portion integrally connected to each other. The same applies to the following description.

The configuration described in this embodiment can be applied to a discharge device that generates ions, electrons, radicals (radial), and the like. The structure described in this embodiment mode can be applied to a discharge device that generates active species such as ozone. In addition, the ions generated by the discharge device may be only positive ions or only negative ions. The discharge device may generate both positive and negative ions.

(embodiment mode 2)

A discharge device according to embodiment 2 of the present invention will be described with reference to fig. 6 to 7. Fig. 6 is a plan view of a part of the discharge device according to the present embodiment. A sagittal sectional view relating to line VII-VII of fig. 6 is shown in fig. 7.

The discharge device of the present embodiment includes a case 4i instead of the case 4 shown in embodiment 1. The case 4i includes a first plate 41 and a second plate 42.

In this embodiment, the face of the first side 81 of the second plate 42 comprises a flat first region 45. The second opening 62 is disposed adjacent to the outer periphery of the first region 45. In the example shown in the present embodiment, the case 4i is elongated with the left-right direction in fig. 6 being the longitudinal direction, and the two second openings 62 are arranged so as to be aligned in the width direction of the case 4 i.

When the resin is injected into the case, the bubbles move upward in the internal space 2, and the bubbles that have reached the first region 45 of the second plate 42 have a high probability of moving to the outer periphery of the first region 45 and being accumulated therein. In contrast, in the present embodiment, since the second opening 62 is disposed so as to be adjacent to the outer periphery of the flat first region 45, the air bubbles are easily released from the second opening 62 to the outside.

In fig. 6, an example in which a pair of second openings 62 is provided is shown, but the number of pairs is not limited to one, and a plurality of pairs may be provided as shown in fig. 8. In fig. 8, the discharge device includes a case 4j, and a plurality of pairs of second openings 62 are provided so as to be aligned in the longitudinal direction of the case 4 j. Such a configuration in which the pair of second openings 62 are arranged in the width direction at a specific position in the longitudinal direction of the case is merely an example. The second opening portions 62 do not necessarily have to be paired. The second openings 62 are not necessarily arranged at equal intervals. The second openings 62 may be arranged in a lattice shape or may be irregularly arranged.

Alternatively, the discharge device may be as shown in fig. 9. The discharge device includes a case 4 k. The second opening 62 is also disposed in the case 4k so as to be adjacent to the outer periphery of the flat first region 45. However, in this case, the second opening 62 is a long opening along the longitudinal direction of the case 4 k.

The discharge device may be as shown in fig. 10. The discharge device includes a case 4 n. The second opening 62 is also disposed in the case 4n so as to be adjacent to the outer periphery of the flat first region 45. In this example, the second opening 62 is provided so as to cross the upper surface of the case 4n in the width direction.

(embodiment mode 3)

A discharge device according to embodiment 3 of the present invention will be described with reference to fig. 11 to 13. Fig. 11 is a plan view of a part of the discharge device 103 according to the present embodiment. The sagittal sectional view associated with line XII-XII of FIG. 11 is shown in FIG. 12. A sagittal cross-sectional view relating to line XIII-XIII of FIG. 11 is shown in FIG. 13.

The discharge device 103 includes a case 4 r. The case 4r includes a level difference thereon. Some of the above are high compared to other parts. Hereinafter, for the sake of description, the high portion is referred to as "high back portion" and the low portion is referred to as "low back portion". In the example shown here, the rectangular area occupying the center is the high back portion, and the outer edge portion is the low back portion. The positional relationship between the high back and the low back when viewed in plan view is not limited to the example shown here.

In the case 4r, the second plate 42 is on the high back. Since the first opening 61 and the second opening 62 are provided in the second plate 42, the first opening 61 and the second opening 62 are both on the high back.

Even with the configuration like the discharge device 103 of the present embodiment, the same effects as those described in embodiment 1 and the like can be obtained. When resin is injected into the internal space 2 to form the insulating seal portion 7, the bubbles move upward and come into contact with the second plate 42 on the high back side with a high probability. Since the second opening 62 is provided in the second plate 42, the air bubbles can escape to the outside of the case 4r through the second opening 62.

Although the first opening 61 and the second opening 62 are described here as being on the high back side, either the first opening 61 or the second opening 62 may be provided on the low back side.

(embodiment mode 4)

A discharge device according to embodiment 4 of the present invention will be described with reference to fig. 14 to 15. Fig. 14 is a plan view of a part of the discharge device 104 according to the present embodiment.

As shown in fig. 14, the discharge device 104 of the present embodiment includes a case 4 u. In the case 4u, two second openings 62 are provided so as to be aligned in the width direction of the high back portion. The sagittal sectional view associated with the XV-XV line of FIG. 14 is shown in FIG. 15.

In this embodiment, the face of the first side 81 of the second plate 42 includes a flat first region 45. The second opening 62 is disposed adjacent to the outer periphery of the first region 45.

Even with the configuration like the discharge device 104 of the present embodiment, the same effects as those described in embodiment 2 and the like can be obtained.

(embodiment 5)

A discharge device according to embodiment 5 of the present invention will be described with reference to fig. 16 to 17. Fig. 16 is a plan view of a part of the discharge device according to the present embodiment. The sagittal cross-sectional view associated with the line XVII-XVII of FIG. 16 is shown in FIG. 17. The discharge device includes a case 4i 2.

The discharge device of the present embodiment includes a part 16. The component 16 is disposed in the internal space 2 of the case 4i2 and is applied with a voltage. In this discharge device, the second opening 62 is disposed so as to avoid the region 50 where the component 16 is projected toward the second plate 42. The part 16 may be a high voltage part.

In the present embodiment, since the second opening 62 is disposed so as to avoid the region 50 where the component 16 is projected toward the second plate 42, the component 16 is covered not only by the insulating seal portion 7 but also by the second plate 42. With this configuration, the insulation around the component 16 can be further improved. Further, the component 16 can be protected more reliably.

In the present embodiment, an example is shown in which the two second openings 62 arranged in the width direction of the case 4i2 sandwich the component 16 in a plan view, but a configuration as shown in fig. 18 is also conceivable. In this example, the discharge device includes a case 4i 3. In the case 4i3, the second opening 62 is provided so as to avoid the component 16 in the longitudinal direction of the case 4i3 in a plan view.

The number of the second openings 62 provided in one case is not limited to the example described so far. When there are a plurality of second openings 62, these may be provided asymmetrically. The plurality of second opening portions 62 may be a combination of opening portions of different shapes and sizes.

(embodiment mode 6)

The detailed shape of the second opening 62 will be described as embodiment 6 according to the present invention. Fig. 19 shows a cross section of the second plate 42 in the vicinity of the second opening 62. In this example, the second opening 62 includes a straight inner peripheral surface. Although this may be a basic configuration, configurations other than this are also conceivable.

The second opening 62 may be, for example, as shown in fig. 20. In this case, the second opening 62 includes an inner peripheral surface having an inclined shape. The second opening 62 is expanded toward the inner surface of the case.

Further, this can be as shown in FIG. 21. In this case, the second opening 62 is a combination of a straight portion and an inclined portion. The second opening 62 is inclined on the side closer to the inside of the case. In other words, a part of the first side 81 is formed in an inclined shape, and a part of the second side 82 is formed in a straight shape.

As shown in fig. 20 and 21, the second opening 62 preferably includes a shape in which the first side is expanded when viewed in a cross-sectional view taken perpendicularly to the cross-section of the second plate 42. With this configuration, bubbles can be easily discharged.

(embodiment 7)

As embodiment 7 according to the present invention, a change in the shape of the periphery of the second plate 42 of the case will be described.

(first example)

Fig. 22 illustrates a first example of the present embodiment. In this example, the surface of the first side 81 of the second plate includes the flat first region 45 and includes the inclined surface 13 that is inclined so as to be separated from the outer periphery of the first region 45 toward the first side 81 so as to follow at least a part of the outer periphery of the first region 45.

(second example)

Fig. 23 illustrates a second example of the present embodiment. In this example, the curved surface 15 is formed so as to extend along at least a part of the outer periphery of the first region 45, and so as to be directed toward the first side 81 while continuously changing from the first region 45 as it separates from the outer periphery of the first region 45.

(third example)

Fig. 24 illustrates a third example of the present embodiment. In this example, the upper surface of the box contains a step. The second plate 42 that is raised by the step difference includes the first region 45 as a surface facing the first side 81. The inclined surface 13 is included so as to be inclined toward the first side 81 along at least a part of the outer periphery of the first region 45 so as to be separated from the outer periphery of the first region 45.

(fourth example)

Although not shown in the fourth example of the present embodiment, the fourth example is a configuration in which the inclined surface 13 of the third example is replaced with a curved surface 15.

In the examples shown here, if the inclined surface 13 or the curved surface 15 is provided, air bubbles are less likely to stay inside the case 4 during resin injection, and the air bubbles are more likely to escape from the second opening 62. Therefore, according to the present embodiment, it is possible to provide a discharge device in which bubbles are less likely to remain in the case 4.

(embodiment mode 8)

The positional relationship between the inclined surface 13 and the second opening 62 will be described as embodiment 8 according to the present invention. The entire configuration may be the configuration of the first example, the third example, or other configurations of embodiment 7. So long as it is a configuration including the inclined surface 13.

(first example)

Fig. 25 shows a plan view of a first example of the present embodiment. The sagittal sectional view associated with the line XXVI-XXVI of FIG. 25 is shown in FIG. 26. The upper end of the slope 13 coincides with one side of the second opening 62. In this way, the air bubbles moving upward in the drawing along the inclined surface 13 are smoothly discharged from the second opening 62.

(second example)

Fig. 27 shows a plan view of a second example of the present embodiment. The sagittal cross-sectional view associated with line XXVIII-XXVIII of FIG. 25 is shown in FIG. 28. A sagittal sectional view relating to the line XXIX-XXIX of fig. 27 is shown in fig. 29. The inclined surface 13 extends along the outline of the case in plan view. The second opening 62 is provided to cut a notch in the middle of the extended slope 13. In this way, the air bubbles are more smoothly discharged from the second opening 62.

(embodiment mode 9)

A discharge device according to embodiment 9 of the present invention will be described with reference to fig. 30. Fig. 30 is a sectional view of the discharge device of the present embodiment cut along a section passing through the second opening 62. The second plate 42 of the case includes a portion having a non-uniform thickness as described above. At least a portion of the underside of the second plate 42 becomes the ramp 14. The slope 14 is inclined so as to approach the first side 81 as it goes away from the second opening 62. The ramp 14 may be present throughout the entirety of the second plate 42. In this case, the air bubbles are guided to approach the second opening 62 and are discharged from the second opening 62 more smoothly. Although the internal space 2 is slightly narrowed when the slope 14 is set to be large, such a configuration is also effective unless the arrangement of the objects in the internal space 2 is not obstructed.

(embodiment mode 10)

A discharge device according to embodiment 10 of the present invention will be described with reference to fig. 31 to 32. Fig. 31 shows an external appearance of the discharge device 110 according to the present embodiment. A cross-section of the discharge device 110 is illustrated in fig. 32. The discharge device 110 includes a case 4v and two discharge electrodes 5i. The case 4v includes two first openings 61 and one second opening 62 in the upper surface. The second opening 62 is located substantially at the center between the two first openings 61. The two discharge electrodes 5i are disposed so as to penetrate the two first openings 61. Each of the discharge electrodes 5i is a brush-shaped electrode. For example, one of the two discharge electrodes 5i functions as a positive electrode, and the other functions as a negative electrode.

A plurality of protection portions 19 are provided on the upper surface of the case 4v. Two protective portions 19 are provided for one discharge electrode 5i, and the two protective portions 19 are disposed so as to sandwich the discharge electrode 5i. The protection portion 19 shown here is door-shaped. That is, the protector 19 includes two columnar portions rising from the upper surface of the case 4v and a rod portion connecting upper ends of the two columnar portions. The shape of the protection portion is not limited to that shown here, and may be other shapes. The protector 19 may be formed integrally with the case 4v. The presence of the protection portion 19 is not essential. That is, the discharge device 110 may not include the protection unit 19.

The base material 3 is disposed inside the case 4v. The

components

16a, 16b, 17 are mounted on the upper surface of the base 3. At least the

parts

16a, 16b are parts to which a high voltage is applied. The first opening 61 and the second opening 62 are provided at positions avoiding the

parts

16a and 16 b.

In the present embodiment, an example of a discharge device is shown. In the discharge device of the present embodiment, since the second opening 62 is provided at an appropriate position, when the resin is injected from the two first openings 61 to form the insulating seal 7, the possibility that the air bubbles generated between the two first openings 61 are discharged from the second opening 62 at the center is increased. Therefore, the discharge device can be provided in which bubbles are less likely to remain in the case.

In the example shown here, the

components

16a, 16b, and 17 are disposed on the upper surface of the base 3, but the components are not limited to the upper surface of the base 3 and may be disposed on the lower surface of the housing. The base material 3 may be provided with a notch or a through hole as appropriate. The component may be disposed so as to penetrate a notch or a through hole of the base material 3.

In the above embodiments, the case is illustrated as a cube, but the case may have a shape other than a cube. Although the first opening and the second opening are illustrated as being rectangular, the first opening may have a shape other than a rectangle. The second opening may have a shape other than a rectangle.

The outer shape of the case shown in each of the embodiments described above is merely an example, and is not limited to such a shape.

In the embodiments described above, the case where the discharge electrode is needle-shaped and the case where the discharge electrode is brush-shaped have been described, but the shape of the discharge electrode is not limited to this. The discharge electrode may have various shapes such as a rod, a wire, a fiber, and a sheet.

In addition, a plurality of the above embodiments may be combined as appropriate. It should be noted that all the points of the above embodiments disclosed herein are illustrative and not restrictive. The scope of the present invention is indicated by the appended claims, and all changes that come within the meaning and range of equivalency of the claims are intended to be embraced therein.

Description of the reference numerals

An interior space; a substrate; 4. 4i, 4i2, 4i3, 4j, 4k, 4n, 4r, 4u, 4v.. box; 5. a discharge electrode; an insulating seal; 13. a bevel; a curved surface; 16. 16a, 16b, 17.. part; a protective portion; a first plate; a second plate; 45... first region; a region (where the projection was performed); 61.. a first opening; a second opening portion; a first side; 82... second side; 101. 103, 104, 110

Claims

1. An electric discharge device, comprising:

a case including a first plate disposed on a first side and a second plate disposed on a second side opposite to the first side, the second plate being disposed so as to face the first plate and including a first opening, an internal space being defined between the first plate and the second plate;

a substrate disposed in the internal space;

a discharge electrode held by the base material and arranged such that a distal end portion thereof protrudes outside the case through the first opening; and

an insulating sealing portion that seals the base material in the internal space;

the second plate includes a second opening portion in addition to the first opening portion, and the discharge electrode does not penetrate the second opening portion.

2. The discharge device according to claim 1, wherein the first side surface of the second plate includes a flat first region, and the second opening portion is disposed so as to be adjacent to at least a part of an outer periphery of the first region.

3. The discharge device according to claim 1 or 2, comprising a part which is disposed in the internal space and to which a voltage is applied;

the second opening is disposed so as to avoid a region where the component is projected toward the second plate.

4. The discharge device according to claim 1 or 2, wherein the second opening portion includes a shape in which the first side is more expanded than the second side when viewed in a cross-sectional view taken perpendicularly to a cross-section of the second plate.