KR102107094B1 - Discharge tube manufactured using laser and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a discharge tube manufactured using a laser and a manufacturing method thereof. The method includes: a step of forming a first electrode groove on any one of an inner surface and an outer surface of the dielectric through laser processing; and a step of coating a conductive paint on the first electrode groove. According to the present invention, an adhesion between the dielectric and the electrode can be improved by generating an electrode using a laser, and an electrode pattern can be freely formed and the electrode pattern can be formed uniformly. In addition, since a gap between an inner electrode and an outer electrode can be reduced, power consumed during discharge can be reduced.

Description

Discharge tube manufactured using laser and its manufacturing method {DISCHARGE TUBE MANUFACTURED USING LASER AND MANUFACTURING METHOD THEREOF}

The present invention relates to a discharge tube manufactured using a laser and a manufacturing method thereof, and more particularly, to a discharge tube provided with an electrode made using laser processing and a method for manufacturing the discharge tube.

The air purifying apparatus using plasma includes a discharge tube therein, which is usually made of an inner electrode and an outer electrode, and a dielectric positioned between the two. When an AC voltage is applied between the inner electrode and the outer electrode, a dielectric barrier discharge phenomenon, that is, low temperature plasma discharge occurs between the dielectric and the outer electrode. When ions, electrons, and anions are generated in the air by the plasma discharge, air is purified by removing fine dust, volatile organic compounds, and bacteria contained in the air in the space where the discharge tube is located. The air purifying device may purify the air in the entire space where the air purifying device is located by circulating the air where the discharge tube is located while repeating the process of inhaling and discharging the air.

Republic of Korea Patent Publication No. 2014-0072087 is an invention related to an air purifying apparatus using a dielectric barrier discharge, and is characterized by producing a discharge tube by forming a dielectric by closely coating a synthetic resin film on the entire surface of the inner electrode. The discharge tube of such a conventional air purification apparatus is manufactured by coating a synthetic resin film on the entire surface of the inner electrode, which makes it difficult to closely adhere the inner electrode and the dielectric.

On the other hand, the discharge tube may be manufactured by patterning the inside of the discharge tube by chemical etching to produce an electrode, but in this case, since the discharge tube has a cylindrical structure, it is difficult to uniformly form a pattern therein.

Korean Patent No. 10-2014-0072087

The problem to be solved by the present invention is to provide a discharge tube capable of improving the adhesion between the dielectric and the electrode and a manufacturing method thereof.

The problem to be solved by the present invention is to provide a discharge tube capable of freely forming an electrode pattern, and uniformly forming an electrode pattern, and a method of manufacturing the same.

The problem to be solved by the present invention is to provide a discharge tube capable of reducing power consumed during discharge and a method for manufacturing the same.

Discharge tube manufacturing method according to an embodiment of the present invention for solving this problem, forming a first electrode groove through a laser processing on any one of the inner surface and the outer surface of the dielectric, and the first electrode groove conductive And applying the paint.

The method may further include forming a counter electrode on a surface opposite to the surface on which the first electrode groove is formed.

The forming of the counter electrode may include forming a second electrode groove on the opposite surface through the laser processing, and applying the conductive paint to the second electrode groove.

The distance between the electrode generated by the first electrode groove and the counter electrode may be smaller than the thickness of the dielectric.

The dielectric may be formed of a quartz tube through which laser light is transmitted and a focus is formed at a predetermined position to form the first electrode groove.

The discharge tube according to another embodiment of the present invention is formed by forming a first electrode groove through a laser process on any one of a dielectric, the dielectric inner surface and an outer surface, and applying a conductive paint to the first electrode groove It includes a first electrode, and a second electrode facing the first electrode with the dielectric interposed therebetween.

The second electrode may be formed by forming a second electrode groove through the laser processing and applying the conductive paint to the second electrode groove.

A gap between the first electrode and the second electrode may be smaller than the dielectric thickness.

The dielectric may be formed of a quartz tube through which laser light is transmitted and a focus is formed at a predetermined position to form the first electrode groove.

The air purification apparatus according to another embodiment of the present invention forms a first electrode groove through a laser process on at least one of a dielectric material, the dielectric inner surface and an outer surface, and applies a conductive paint to the first electrode groove And a discharge tube including a first electrode to be generated, and a second electrode facing the first electrode with the dielectric interposed therebetween, and a power supply for supplying power to the first electrode and the second electrode.

According to an embodiment of the present invention, the adhesion between the dielectric and the electrode can be improved by generating the electrode using a laser.

According to an embodiment of the present invention, an electrode pattern can be freely formed by generating an electrode using a laser, and an electrode pattern can be uniformly formed.

According to the exemplary embodiment of the present invention, since the distance between the inner electrode and the outer electrode can be reduced while maintaining the strength of the dielectric by generating an electrode using a laser, power consumed during discharge can be reduced.

1 is a flow chart showing a method of manufacturing a discharge tube according to an embodiment of the present invention.
2 is a schematic diagram illustrating irradiation of a laser to create an electrode groove according to an embodiment of the present invention.
3 is a schematic diagram illustrating irradiation of a laser to generate an electrode groove according to an embodiment of the present invention.
4 is a schematic view showing application of a conductive paint to an electrode groove according to an embodiment of the present invention.
5 is a view for explaining the power reduction effect by the electrode spacing of the discharge tube according to an embodiment of the present invention.
6 to 10 are views showing a discharge tube actually manufactured according to an embodiment of the present invention.
11 is a schematic diagram showing an air purification apparatus to which a discharge tube according to an embodiment of the present invention is applied.
12 is a view showing a discharge tube according to another embodiment of the present invention.
13 is a view showing a discharge tube according to another embodiment of the present invention.

Hereinafter, exemplary embodiments disclosed herein will be described in detail with reference to the accompanying drawings, but the same or similar elements will be given the same reference numbers regardless of the reference numerals, and redundant descriptions thereof will be omitted. Suffix for the components used in the description below ?? Module ?? And ?? part ?? are given or mixed only considering the ease of writing the specification, and do not have meanings or roles that are distinguished from each other. In addition, in the description of the embodiments disclosed herein, when it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed herein, detailed descriptions thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the specification is not limited by the accompanying drawings, and all modifications included in the spirit and technical scope of the present invention , It should be understood to include equivalents or substitutes.

1 is a flow chart showing a method of manufacturing a discharge tube according to an embodiment of the present invention.

Referring to FIG. 1, a method of manufacturing a discharge tube according to an embodiment of the present invention first prepares a dielectric (S110). The dielectric material may be made of a hollow cylindrical quartz tube or a glass tube, but is not limited thereto, and may be made of various known plastic materials or ceramics including polyvinyl chloride (PVC). However, the dielectric can transmit the laser beam so that the laser beam can be focused at any desired position. Hereinafter, for convenience of description, the quartz tube will be described as a dielectric material.

One end of the cylindrical quartz tube in the lateral direction protrudes outward in a hemisphere shape, as shown in FIG. 10, and the other end is formed in an open shape.

When the quartz tube is prepared, an electrode groove is generated by irradiating a laser on the inner surface of the quartz tube (S120). 2 and 3, the laser beam 315 irradiated from the laser device (not shown) proceeds in the direction of the arrow and passes through the lens 310 to form a focus. 2 and 3, the cylindrical quartz tube 320 is cut in the longitudinal direction to show a cross-sectional shape.

When the position where the focal point of the laser beam 315 is formed is the upper inner surface of the quartz tube 320 as shown in FIG. 2, an electrode groove is formed in the upper inner surface of the quartz tube 320. In addition, when the focal position of the laser beam 315 is the lower inner surface of the quartz tube 320 as shown in FIG. 3, the laser beam 315 passes through the upper end of the quartz tube 320 and then the electrode on the lower inner surface of the quartz tube 320. Grooves are formed. By moving the focal position of the laser beam 315 and creating an electrode groove, the internal electrode can be formed into various shapes such as irregularities and patterns.

In this way, if the laser beam 315 transmits the quartz tube 320 and focuses on it, the inner electrode can be easily fabricated even in the cylindrical quartz tube 320 having a narrow width and difficult to process inside.

In addition, by using the laser beam 315, the electrode groove 330 can be precisely processed at any position of the quartz tube 320, so that an electrode having a desired pattern can be freely manufactured, and thus the uniformity of plasma generated. It can also be improved and can be effective in air modification and removal of bacteria in the air.

The thickness of the region of the quartz tube 320 with the electrode groove processed by the laser is thinner than the thickness of the region of the quartz tube 320 without the machining groove. The depth of the electrode groove by laser processing is good enough to maintain appropriately so that the strength of the quartz tube 320 is not reduced.

When the electrode groove 330 is formed on the inner surface of the quartz tube 320, as shown in FIG. 4, the electrode is coated with a conductive paste such as silver, copper, nickel, etc. on the inner surface of the quartz tube 320. The conductive paint 340 is inserted into the groove 330 (S130). The conductive paint 340 inserted in the electrode groove 330 becomes an internal electrode of the discharge tube.

Since the electrode groove 330 made by laser processing is filled with a conductive paint 340 to form an internal electrode, an embodiment of the present invention is compared to a method using a mesh-type electrode or coating a mesh and a synthetic resin film as in the prior art. The adhesiveness of the inner surface of the quartz tube 320 manufactured according to the inner electrode is improved. In addition, when applying the conductive paint 340 to the inner surface of the quartz tube 320, a method using a centrifugal force such as spin coating may be used, and thus the degree of adhesion between the electrode groove 330 and the conductive paint 340 Can be further improved.

Referring back to FIG. 1, when an internal electrode is formed by applying a conductive paint, an external electrode made of a mesh or the like is generated outside the quartz tube 320 (S140) to manufacture a discharge tube.

Referring to FIG. 5, the thickness of the quartz tube 320 before laser processing is indicated by d1, and the thickness of the quartz tube 320 where the electrode groove 330 is located after laser processing is indicated by d2. Since the discharge tube is made of an inner electrode and an outer electrode with the quartz tube 320 interposed therebetween, the thickness d1 is the interval between the inner and outer electrodes before laser processing, and the thickness d2 is the interval between the inner and outer electrodes after laser processing. It becomes. As described above, while maintaining the strength of the quartz tube 320 not to be reduced, the gap between the inner electrode and the outer electrode can be reduced by appropriately generating the electrode groove 330 through laser processing to generate an inner electrode. As it can cause discharge, it is possible to lower the required voltage.

For example, if the thickness of the electrode groove 330 is half the thickness (d1) of the quartz tube 320, that is, d2 = d1 / 2, the electric field at the position of the electrode groove 330 as shown in the following [Equation] Is doubled, and the power consumed can be reduced to 1/4.

[Mathematics]

Then, a discharge tube actually manufactured according to an embodiment of the present invention will be described with reference to FIGS. 6 to 10.

6 (a) shows that an electrode groove is formed on the inner surface of the quartz tube as indicated by the yellow arrow. 6 (b) to 6 (d) are enlarged electrode grooves (x6.3 x10 x20) respectively.

7 is a photograph of a quartz tube having an electrode groove formed outside the quartz tube.

8 (a) and 8 (b) show that an electrically conductive paint made of silver is applied to an electrode groove inside the quartz tube, and then an electric wire is connected to the conductive paint to connect with a power source.

9 (a) shows that the outer electrode made of a mesh is covered on the outside of the quartz tube, and FIG. 9 (b) shows that plasma is generated in the electrode groove by actually connecting power to the inner electrode and the outer electrode.

FIG. 10 (a) shows that the quartz tube 320 is covered only by the external electrode 350 made of mesh before laser processing, and FIG. 10 (b) shows that the discharge tube according to the embodiment of the present invention is completed. There is, after laser processing, an external electrode 350 made of a mesh is enclosed outside the quartz tube 320, an internal electrode 340 is formed inside the quartz tube 320, and an internal power source is connected to the internal electrode 340. It shows that the wire 345 which can be connected is connected.

Then, the air purifying apparatus including the discharge tube according to the embodiment of the present invention will be described with reference to FIG. 11.

The air purifying apparatus according to another embodiment of the present invention includes a discharge tube consisting of a quartz tube 320, an internal electrode 340, and an external electrode 350 and a power supply unit 360.

Since the discharge tube is substantially the same as the discharge tube manufactured by the manufacturing method according to the previous embodiment, the contents described in the previous embodiment will be borrowed as it is, and detailed descriptions thereof will be omitted except for differences.

The internal electrode 340 is formed over the entire interior of the quartz tube 320, but is not limited thereto and may be formed only partially or partially as necessary.

The outer electrode 350 surrounds the outer surface of the quartz tube 320 and reacts with the inner electrode 340 to generate plasma. The external electrode 350 is made of a mesh-shaped mesh formed of stainless steel or brass, and is in close contact along the outer surface of the quartz tube 320. The external electrode 350 is formed in a mesh shape to maintain a uniform density of the electrode in the entire area of the quartz tube 320, but is not limited thereto, and quartz, such as made of a plate having a plurality of holes regularly formed Any shape that surrounds the outer surface of the tube 320 and reacts with the inner electrode 340 to generate plasma may be used.

The power supply unit 360 supplies power to the internal electrode 340 and the external electrode 350 through a power cable or a separate power connection. The power source is not alternating current or direct current.

The air purifying device may further include a discharge tube fixing mechanism for smoothly supplying power or fixing the discharge tube.

As described above, according to the air purifying apparatus according to the embodiment of the present invention, a low temperature plasma may be generated by applying voltages to the inner electrode 340 and the outer electrode 350, and the surrounding air of the quartz tube 320 may be purified. . The air purification device may purify the entire indoor air by circulating the indoor air while repeatedly inhaling and discharging the air around the quartz tube 320.

A discharge tube according to another embodiment of the present invention will be described with reference to FIGS. 12 and 13. The quartz tube 420 shown in FIG. 12 is formed by forming an electrode groove on the outer surface of the quartz tube 420 through laser processing and applying a conductive paint 450 to form an electrode groove on the inner surface of the quartz tube in the previous embodiment. Therefore, a detailed description is omitted since it is substantially the same except for applying the conductive paint. Therefore, in the discharge tube, the external electrode 450 is formed in close contact with the quartz tube 420, and the internal electrode is formed in a mesh shape to be in close contact with the quartz tube 420.

In addition, the quartz tube 520 illustrated in FIG. 13 forms electrode grooves on the inner surface and the outer surface of the quartz tube 520 through laser processing, and applies conductive paints 540 and 550 to form inner and outer electrodes. can do. At this time, the discharge tube does not need a separate electrode made of a mesh.

The discharge tube according to FIGS. 12 and 13 may be manufactured and used in any one form according to a need in a manufacturing process or a form used.

The above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

320, 420, 520: quartz tube (dielectric)
330: electrode groove
340, 440, 540: internal electrode (conductive paint)
350, 450, 550: external electrode (conductive paint)
360: power supply

Claims (13)

Used as a plasma discharge tube of an air purification device, the laser device is positioned outside the hollow cylindrical dielectric having a diameter that the laser device cannot enter, so that the laser device focuses the laser beam on the inner surface of the top of the hollow cylindrical dielectric. Forming a top inner surface to form a strip-shaped electrode groove at 90 degree intervals in the longitudinal direction of the hollow cylindrical dielectric on the upper inner surface by forming a depth of the electrode groove to 1/2 of the thickness of the hollow cylindrical dielectric ,
The laser device passes through the top of the hollow cylindrical dielectric to irradiate the laser beam so that a focal point of the laser beam is formed on the inner surface of the bottom of the hollow cylindrical dielectric, and the band-shaped electrode grooves in the longitudinal direction of the hollow cylindrical dielectric on the bottom inner surface Forming an inner surface at a 90-degree interval, but forming the depth of the electrode groove to be 1/2 of the thickness of the hollow cylindrical dielectric.
Repeatedly forming the upper inner surface forming step and the lower inner surface forming step to form at least two electrode groove patterns consisting of four electrode grooves formed at 90 degree intervals on the inner surface of the hollow cylindrical dielectric, and
Applying a conductive paint to the electrode grooves formed on the upper and lower inner surfaces
Discharge tube manufacturing method comprising a. In claim 1,
And forming opposite electrodes on opposite surfaces of the upper and lower inner surfaces where the electrode grooves are formed. In claim 2,
The counter electrode forming step,
Forming a counter electrode groove through the laser processing by the laser device on the opposite surface, and
Applying the conductive paint to the counter electrode groove
Discharge tube manufacturing method comprising a. delete delete delete delete delete delete delete delete delete delete

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