CN111213296B

CN111213296B - Discharge device

Info

Publication number: CN111213296B
Application number: CN201880067307.XA
Authority: CN
Inventors: 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: JPWO2019077770A1; JP6994045B2; WO2019077770A1; CN111213296A; TW201917968A; TWI670908B

Abstract

An electrical discharge device, comprising: a box (4) which comprises a first plate (41) arranged on a first side (81) and a second plate (42) arranged on a second side (82) opposite to the first side (81) so as to face the first plate (41) and comprising an opening (42a), and 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 opening (42 a); and an insulating seal section (7) that seals the base material (3) in the internal space (2). The face of the first side (81) of the second plate (42) comprises a flat first region (45). A slope (13) that slopes toward the first side (81) as it separates from the outer periphery of the first region (45) is formed along at least a portion of the outer periphery of the first region (45). Instead of the slope (13), the curved surface may be a curved surface continuously changing from the first region (45).

Description

Discharge device

Technical Field

The present invention relates to a discharge device. The present application claims priority based on japanese patent application No. 2017-203484 filed for 10/20/2017. All the descriptions of the japanese patent application are incorporated herein by reference.

Background

As one of the discharge devices, there is an ion generating device. A circuit module used in an ion generating apparatus is disclosed in japanese patent application laid-open No. 2004-178937 (patent document 1). In this device, a substrate is disposed inside a case, and these are sealed by a polymer material mold portion. The case includes an opening on the upper side, and the upper surface of the polymer material mold is exposed in the opening.

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. 2004-178937

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, in an ion generating device disclosed in patent document 1, there is a component to which a high voltage is applied, including a circuit for generating a high voltage, in order to cause an electric discharge. Such parts are molded from a polymer material or the like in order to prevent performance degradation due to abnormal discharge 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 so as to face the first plate and including an opening, and defining an internal space 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 to the outside of the case through the opening; and an insulating sealing portion that seals the base material in the internal space. The face of the first side of the second plate comprises a flat first region. A slope inclined so as to face the first side as being separated from the outer periphery of the first region or a curved surface that faces the first side as being separated from the outer periphery of the first region while continuously changing from the first region is formed along at least a part of the outer periphery of the first region.

Effects of the invention

According to the present invention, since the inclined surface is provided along at least a part of the outer periphery of the first region, air bubbles are less likely to stay inside the case at the time of resin injection, and the air bubbles are more likely to escape from the opening. Therefore, the discharge device can be provided in which bubbles are less likely to remain in the case.

Drawings

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

Fig. 2 is a partial 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 an explanatory diagram of an example in which a slope is provided along only a part of the outer periphery of the first region in the discharge device according to embodiment 1 of the present invention.

Fig. 6 is an explanatory diagram of an example in which the discharge device according to embodiment 1 of the present invention is provided with the inclined surface over the entire circumference of the outer circumference of the first region.

Fig. 7 is a cross-sectional view of a discharge device according to embodiment 2 of the present invention.

Fig. 8 is a partial cross-sectional view of a case included in a discharge device according to embodiment 3 of the present invention.

Fig. 9 is a partial cross-sectional view of a case included in a discharge device according to a modification of embodiment 3 of the present invention.

Fig. 10 is a partial cross-sectional view of a case included in a discharge device according to embodiment 4 of the present invention.

Fig. 11 is a partial cross-sectional view of a case included in a discharge device according to a modification of embodiment 4 of the present invention.

Fig. 12 is a cross-sectional view of a discharge device according to embodiment 5 of the present invention.

Fig. 13 is a perspective view of an example of a discharge electrode that a discharge device according to embodiments of the present invention may include.

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 is a plan view of a part 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.

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 an opening 42a. 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 such that the tip portion protrudes outside the case 4 through the opening 42a. The discharge electrode 5 may be a needle electrode, for example. 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.

The face of the first side 81 of the second plate 42 comprises a flat first region 45. A slope 13 is formed so as to extend along at least a part of the outer periphery of the first region 45 and incline toward the first side 81 as it separates from the outer periphery of the first region 45. Fig. 5 is a plan view of a portion of the section in which the inclined surface 13 is provided in the present embodiment, the portion being indicated by hatching. The inclined surface 13 formed on the back side of the second plate 42 is not directly visible when the discharge device 101 is viewed from above, but is assumed to be visible through the inclined surface 13. Here, as an example, the slope 13 is formed along only a part of the outer periphery of the first region 45.

The discharge device 101 includes

parts

16, 17 inside the case 4. Of these, at least the component 16 is applied with a voltage. Part 16 may also be high voltage applied. The

parts

16 and 17 are sealed by the insulating seal portion 7 in the same manner as the base material 3.

In the present embodiment, since the inclined surface 13 is provided along at least a part of the outer periphery of the first region 45, 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 opening 42a. 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.

In the present embodiment, as shown in fig. 5, the slope 13 is provided along at least a part of the outer periphery of the first region 45. On the other hand, another example is shown in fig. 6. In fig. 6, the slope 13 is provided in more sections in the outer periphery of the first region 45. As shown in fig. 6, the inclined surface 13 is preferably formed over the entire circumference of the outer periphery of the first region 45. With this configuration, bubbles can be more reliably discharged from the case 4.

In the description so far, although the concept of "first plate" and "second plate" has been presented, the term "plate" 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. 7. Fig. 7 shows a cross section of the discharge device 102 of the present embodiment. The basic configuration of the discharge device 102 is the same as that described in embodiment 1, but differs from that described below.

The discharge device 102 includes a case 4i instead of the case 4. The case 4i includes a curved surface 15 instead of the inclined surface 13 described in embodiment 1. That is, the discharge device 102 is provided with the curved surface 15 that continuously changes from the first region 45 while moving away 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.

In the present embodiment, since the curved surface 15 is provided along at least a part of the outer periphery of the first region 45, air bubbles are less likely to stay inside the case 4i at the time of resin injection, and the air bubbles are more likely to escape from the opening 42a. Therefore, according to the present embodiment, a discharge device in which bubbles are less likely to remain can be provided.

As described above with reference to fig. 6 in embodiment 1 with respect to the inclined surface 13, the curved surface 15 is preferably formed over the entire circumference of the outer periphery of the first region 45. With this configuration, bubbles can be more reliably ejected from the inside of the case 4 i.

(embodiment mode 3)

A discharge device according to embodiment 3 of the present invention will be described with reference to fig. 8. The discharge device of the present embodiment includes a case 4j instead of the case 4. Fig. 8 illustrates a cross section of the case 4 j. In the case 4j, the slope 13 extends in a planar shape from the first region 45 to the second region 46. The other parts have the same configurations as described so far, and therefore, the description thereof will not be repeated.

Even with such a configuration, it is possible to facilitate the discharge of air bubbles during the injection of the resin for forming the insulating seal portion 7, and air bubbles are less likely to remain.

(modification of embodiment 3)

Further, the structure shown in fig. 9 may be employed. In the example shown in fig. 9, the discharge device includes a case 4k instead of the case 4j described in embodiment 3. In the case 4k, the curved surface 15 is provided so as to reach the second region 46 from the first region 45. The curved surface 15 is continuously connected to the first region 45, but is discontinuously connected to the second region 46. The curved surface 15 may also be perpendicular to the second region 46. Even with such a configuration, the same effects can be obtained.

(embodiment mode 4)

A discharge device according to embodiment 4 of the present invention will be described with reference to fig. 10. The discharge device of the present embodiment includes a case 4u instead of the case 4. Fig. 10 shows a cross section of the case 4 u. In the case 4u, the second plate 42 includes the first region 45 but does not include the second region 46. In such a configuration, the slope 13 is provided along at least a part of the outer periphery of the first region 45. The other parts have the same configurations as described so far, and therefore, the description thereof will not be repeated.

(modification of embodiment 4)

Further, the structure shown in fig. 11 may be employed. In the example shown in fig. 11, the discharge device includes a case 4v instead of the case 4u described in embodiment 4. In the case 4v, a curved surface 15 is provided instead of the inclined surface 13. Even with such a configuration, the same effects can be obtained.

(embodiment 5)

A discharge device according to embodiment 5 of the present invention will be described with reference to fig. 12. The basic configuration of the discharge device 103 is the same as that described in embodiment 1, but differs in the following points. The discharge device 103 includes a part 16. The component 16 is disposed in the internal space 2. Part 16 is energized. In the discharge device 103, when the height of the first region 45 as viewed from the surface of the second side 82 of the first plate 41 is defined as the first height H1, the second plate 42 includes the second region 46 at the second height H2 lower than the first height H1 as viewed from the surface of the second side 82 of the first plate 41. The component 16 is disposed in a region where the first region 45 is projected toward the first plate 41. The face of the second side 82 of the part 16 is on the second side 82 as compared to the second region 46.

By adopting the configuration as described in the present embodiment, the height of the second plate 42 can be made lower than the height of the component 16 except for the periphery of the component 16, and the necessary amount of resin can be reduced. Since the component 16 to which a high voltage is applied is disposed in the projection region of the first region 45 and the inclined surface 13 is provided at least in a part of the outer periphery of the first region 45, bubbles around the component 16 are easily eliminated at the time of injecting the resin for forming the insulating seal portion 7, and the bubbles are less likely to remain around the component 16. As a modification of the present embodiment, in the above-described configuration, the curved surface 15 may be provided instead of the inclined surface 13.

In the example shown here, the component 16 is mounted on the surface of the second side 82 of the first plate 41, but this is merely an example. The part 16 does not necessarily have to meet the first plate 41. For example, the component 16 may be fixed to the base material 3 or the like in any form, and the component 16 may be floated from the first plate 41.

Although the discharge electrode 5 is common to the above embodiments, it is preferable that the discharge electrode is an ion generating electrode. The discharge device preferably includes, for example, a discharge electrode 5i shown in fig. 13. The discharge electrode 5i is a brush electrode, and is an ion generating electrode. The discharge electrode 5i includes a structure in which a plurality of fibrous conductors 5ia are bundled and one end thereof is restrained by a fixture 5ib, and a rod-like portion 5ic supporting these. The other end of the fibrous conductor 5ia is not bound and can freely expand. The form of the ion generating electrode is not limited to the brush electrode shown in fig. 13, and various other forms are possible. Examples of the ion generating electrode include various types such as a rod, a wire, a fiber, and a sheet.

Although fig. 1 shows an example in which one discharge device 101 includes two discharge electrodes 5, the number of discharge electrodes may be 2 or more. For example, a discharge device may include only one discharge electrode. One discharge device may also include more than three discharge electrodes. In embodiment 1 and the like, although an example is shown in which one discharge electrode 5 is disposed in one opening 42a, two or more discharge electrodes may be disposed in one opening. In embodiment 1 and the like, the shape of the opening 42a is rectangular, but the shape of the opening for disposing the discharge electrode may be other than rectangular.

In fig. 1, the structure for protecting the discharge electrode 5 is not arranged around the discharge electrode 5, but this is merely an example. Actually, according to the known technology, in order to prevent other parts, fingers of an operator, and the like from colliding with the discharge electrode 5, it is preferable to provide some protective structure around the discharge electrode 5. As the protective structure, for example, a frame-shaped component having a height higher than that of the discharge electrode 5 is considered. The height here refers to a height with respect to the upper surface of the case. By providing some protection structure, the damage of the discharge electrode 5 can be prevented. Further, by providing some protection structure, it is possible to prevent the worker from feeling pain or injury by inadvertently touching the discharge electrode 5.

Further, 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, 4j, 4k, 4u, 4v.. box; 5. a discharge electrode; 5ia.. a fibrous electrical conductor; 5ib.. a fixture; a rod-like portion; an insulating seal; a bevel; a curved surface; 16. a part; a first plate; a second plate; an opening portion; 45... first region; a second region; a first side; 82... second side; 101. 102, 103

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 so as to face the first plate and including an opening, and defining an internal space 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 to the outside of the case through the opening; and

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

The face of the first side of the second plate comprises a flat first region;

the second plate includes a second region having a second height lower than the first height when viewed from the surface of the second side of the first plate, if the height of the first region when viewed from the surface of the second side of the first plate is set to the first height;

the opening portion is formed in the first region;

between the first region and the second region, a slope inclined so as to face the first side as separating from the outer periphery of the first region or a curved surface that faces the first side as separating from the outer periphery of the first region while continuously changing from the first region is formed so as to follow at least a part of the outer periphery of the first region.

2. The discharge device according to claim 1,

the slope or the curved surface is formed over the entire circumference of the outer periphery of the first region.

3. The discharge device according to claim 1 or 2,

includes a part disposed in the internal space and to which a voltage is applied;

the second plate includes a second region having a second height lower than the first height when viewed from the surface of the second side of the first plate, the second region having the first height when viewed from the surface of the second side of the first plate;

the component is disposed in a region where the first region is projected toward the first plate;

the face of the second side of the part is closer to the second side than the second region.

4. The discharge device according to claim 1 or 2,

the discharge electrode is an ion generating electrode.