Dry coating device for filter

Abstract

Disclosed in one embodiment of the present invention is a dry coating device for a filter, comprising: a housing in which a filter is detachably disposed and which includes a hollow therein; a particle supply unit for supplying antibacterial particles into the housing; an ion-supply unit for charging the antibacterial particles; and an ion wind generation unit which is disposed between the particle supply unit and the filter and secondarily charges the antibacterial particles.

Description

Dry coating device for filters

[0001] Embodiments of the present invention relate to a dry coating device for a filter.

[0002] In general, various microorganisms such as bacteria, mold, and viruses are suspended in the indoor air of homes and offices, and these airborne microorganisms can have a negative impact on health by causing airborne infections and environmental diseases.

[0003] Although such airborne microorganisms can be filtered out by dust removal filters, there is a problem where they multiply on the surface of the filter media due to their vitality and re-enter the indoor environment.

[0004] In response to these problems, a technology has recently been proposed to prevent the growth of microorganisms by applying inorganic antimicrobial agents such as silver and copper, or organic antimicrobial agents such as catechin, chitosan, phytoncide, ginkgo leaf extract, and pine needle extract to the surface of the filter media.

[0005] Most of these technologies apply a method of coating the surface of filter media by converting inorganic or organic antimicrobial agents into a liquid form and then immersing the filter media in it and removing it.

[0006] However, these technologies not only require a large amount of antimicrobial agent but also have the problem of the antimicrobial substance adhering unevenly to the surface of the filter media. In addition, they have the disadvantage of requiring an additional high-cost drying process to remove a large amount of solvent from the filter media coated with the antimicrobial substance. Furthermore, due to these characteristics, the porosity of the filter media decreases during the antimicrobial addition process, leading to an increase in pressure loss.

[0007] The aforementioned background technology is technical information that the inventor possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and it cannot be considered as prior art disclosed to the general public prior to the filing of the present invention.

[0008] Embodiments of the present invention can provide a dry coating device for a filter that allows antibacterial particles to be uniformly coated on all areas of the filter.

[0009] The problems that the present invention aims to solve are not limited to those mentioned above, and other problems and advantages of the present invention not mentioned can be understood from the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, it will be understood that the problems and advantages that the present invention aims to solve can be realized by the means and combinations thereof set forth in the claims.

[0010] One embodiment of the present invention discloses a dry coating device for a filter comprising: a housing having a hollow interior and having a filter detachably disposed therein; a particle supply unit for supplying antibacterial particles into the housing; an ion supply unit for charging the antibacterial particles; and an ion wind generating unit disposed between the particle supply unit and the filter inside the housing and for secondary charging the antibacterial particles.

[0011] The dry coating device for a filter according to embodiments of the present invention includes an ion wind generating unit between the filter and the particle supply unit, which uniformly disperses antibacterial particles in the space inside the housing and filters out antibacterial particles that are not well dispersed, thereby allowing antibacterial particles to be uniformly coated on the surface of the filter.

[0012] However, the effects obtainable through the present invention are not limited to those described above, and other unmentioned technical effects will be clearly understood by those skilled in the art from the description of the invention below.

[0013] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings.

[0014] FIG. 1 is a schematic perspective view illustrating an example of a dry coating device for a filter according to one embodiment of the present invention.

[0015] Figure 2 is a cross-sectional view taken from the side of an example of the internal structure of the dry coating device of the filter of Figure 1.

[0016] FIG. 3 is a schematic cross-sectional view illustrating an example of an ion wind generating section of a dry coating device of the filter of FIG. 1.

[0017] Figure 4 is a graph showing the rotational angular velocity of the rotating part according to the position of the electrode pin of the ion wind generating part of Figure 3.

[0018] Figure 5 is a graph showing the rotational angular velocity of the rotating part according to the length of the electrode pin of the ion wind generating part of Figure 3.

[0019] FIG. 6 is a cross-sectional view taken from the side of another example of a dry coating device for a filter according to one embodiment of the present invention.

[0020] One embodiment of the present invention discloses a dry coating device for a filter comprising: a housing having a hollow interior and having a filter detachably disposed therein; a particle supply unit for supplying antibacterial particles into the housing; an ion supply unit for charging the antibacterial particles; and an ion wind generating unit disposed between the particle supply unit and the filter inside the housing and for secondary charging the antibacterial particles.

[0021] In this embodiment, a flow guide member that guides the flow path of the air so that the air inside the housing flows in the direction of the filter may be further included.

[0022] In this embodiment, the ion supply unit may be located inside the particle supply unit.

[0023] In this embodiment, the distance between the filter and the ion wind generating unit may be smaller than the distance between the particle supply unit and the ion wind generating unit.

[0024] In the present embodiment, the ion wind generating unit comprises: a rotating unit that rotates in one direction with respect to a center; and a power supply unit that applies voltage to the rotating unit. The rotating unit comprises a plurality of blades extending from the center and electrode pins each coupled to the plurality of blades. The electrode pins protrude in a direction parallel to the one direction in which the plurality of blades rotate. When voltage is applied to the electrode pins, the electrode pins generate an ion wind, and the blades can rotate in the one direction by means of the ion wind.

[0025] In this embodiment, a counter electrode surrounding the plurality of blades may be further included.

[0026] In this embodiment, the opposing electrode may be grounded.

[0027] In this embodiment, the ratio of the distance from the center to the electrode pin to the distance from the center to the counter electrode may be 0.1 to 0.8.

[0028] In this embodiment, the ratio of the height of the electrode pin to the distance from the center to the opposing electrode may be 0.05 to 0.5.

[0029] In this embodiment, an electric field application unit may be further included to apply electric force to the air so that the air flows from the particle supply unit toward the filter by receiving power from the outside.

[0030] Another embodiment of the present invention discloses a dry coating device for a filter comprising: a housing in which a filter is detachably disposed therein; a particle supply unit for supplying antibacterial particles into the housing; a flow guide unit for guiding the flow path of the air so that the air inside the housing flows toward the filter; and an ion wind generator disposed inside the housing and positioned between the particle supply unit and the filter to charge the antibacterial particles.

[0031] In this embodiment, a coupling part for fixing the filter is further included, and the filter may be located between the ion wind generating part and the coupling part.

[0032] In the present embodiment, the coupling part includes a main body part and a rail part, and the main body part can slide along the rail part.

[0033] In this embodiment, an ion supply unit for charging the antibacterial particles may be further included.

[0034] In this embodiment, the distance between the filter and the ion wind generating unit may be smaller than the distance between the particle supply unit and the ion wind generating unit.

[0035] In the present embodiment, the ion wind generating unit comprises: a rotating unit that rotates in one direction with respect to a center; and a power supply unit that applies voltage to the rotating unit. The rotating unit comprises a plurality of blades extending from the center and electrode pins each coupled to the plurality of blades. The electrode pins protrude in a direction parallel to the one direction in which the plurality of blades rotate. When voltage is applied to the electrode pins, the electrode pins generate an ion wind, and the blades can rotate in the one direction by means of the ion wind.

[0036] In this embodiment, a counter electrode surrounding the plurality of blades may be further included.

[0037] In this embodiment, the ratio of the distance from the center to the electrode pin to the distance from the center to the counter electrode may be 0.1 to 0.8.

[0038] In this embodiment, the ratio of the height of the electrode pin to the distance from the center to the opposing electrode may be 0.05 to 0.5.

[0039] In this embodiment, the opposing electrode may be grounded.

[0040] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe their invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention. It should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application.

[0041] Additionally, as used herein, “comprise, include” and / or “comprising, including” specify the presence of the mentioned features, numbers, steps, actions, parts, elements, and / or groups thereof, and do not exclude the presence or addition of one or more other features, numbers, actions, parts, elements, and / or groups.

[0042] Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be assigned to identical components in different embodiments.

[0043] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may also be the second component.

[0044] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0045] The fact that any configuration is placed on the "upper (or lower)" of a component or on the "upper (or lower)" of a component may mean not only that any configuration is placed in contact with the upper (or lower) surface of said component, but also that another configuration may be interposed between said component and any configuration placed on (or below) said component.

[0046] Furthermore, where it is stated that one component is "connected," "coupled," or "connected" to another component, it should be understood that while said components may be directly connected or connected to each other, another component may be "interposed" between each component, or that each component may be "connected," "coupled," or "connected" through another component. Additionally, when it is stated that a part is electrically coupled with another part, this includes not only cases where they are directly connected but also cases where they are connected with another component in between.

[0047] FIG. 1 is a perspective view schematically illustrating an example of a dry coating device for a filter according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken from the side of an example of the internal structure of the dry coating device for a filter of FIG. 1, and FIG. 3 is a cross-sectional view schematically illustrating an example of an ion wind generating part of the dry coating device for a filter of FIG. 1.

[0048] In the present specification, 'filter (F)' can be interpreted as a filter for purifying a fluid such as air, and as an example, 'filter (F)' may be a pleated filter in which crests and troughs are arranged in an intersecting manner.

[0049] The fibers forming the filter (F) may be coated with antimicrobial particles (AP) to inhibit the proliferation and generation of microorganisms, bacteria, viruses, etc. in the air, and the antimicrobial / antiviral function of the filter (F) may be increased as the antimicrobial particles (AP) are uniformly coated on all areas of the surface of the filter (F) to improve the antimicrobial and antiviral efficiency of the filter (F).

[0050] For example, if the filter (F) is a folded filter, it may be important to uniformly coat both the crest and valley portions of the filter (F) with antibacterial particles (AP) for effective antibacterial / antiviral function of the filter (F).

[0051] A dry coating device (1) according to embodiments of the present invention may be equipped with an ion wind generating unit (300) to uniformly apply antibacterial particles (AP) to all areas of a filter (F), and a detailed explanation regarding this is provided below.

[0052] First, referring to FIGS. 1 and 2, a dry coating device (1) for a filter according to one embodiment of the present invention (hereinafter referred to as the "dry coating device") may include a housing (100) having a hollow interior and a filter (F) that is detachably disposed therein and has an antibacterial particle (AP) such as an antibacterial / antiviral substance or a functional substance, a particle supply unit (200) that supplies antibacterial particles into the housing (100), an ion wind generating unit (300), a flow guide unit (400), and a coupling unit (500).

[0053] The housing (100) provides a space in which a filter (F) is coated inside and can be formed in the shape of a hollow tube extending in a third direction (D3).

[0054] In the present specification, the 'first direction (D1)' may be interpreted as the width direction of the dry coating device (1). Additionally, the 'second direction (D2)' may be interpreted as the height direction of the dry coating device (1). Furthermore, the 'third direction (D3)' may be interpreted as the length direction of the dry coating device (1) or as a direction perpendicular to both the first direction (D1) and the second direction (D2), and the first direction (D1), the second direction (D2), and the third direction (D3) may be directions perpendicular to each other.

[0055] An opening into which a filter (F) is introduced may be formed on one side of the housing (100). For example, the longitudinal direction of the housing (100) may be perpendicular to the direction in which the filter (F) is introduced. That is, the filter (F) may be introduced into the housing (100) along the second direction (D2). After the antibacterial particles (AP) are uniformly coated on the filter (F), the filter (F) may be discharged and collected outside the housing (100) through the opening along the second direction (D2).

[0056] The filter (F) collected with antibacterial particles (AP) uniformly coated can be used, for example, as a filter (F) for an air purifier. Since the filter (F) is uniformly coated with antibacterial particles (AP), the air purification efficiency of the air purifier equipped with the filter (F) can be improved.

[0057] The housing (100) may be made of a transparent or translucent material. For example, the housing (100) may be made of at least one of polycarbonate, acrylic, polymethyl methacrylate (PMMA), glass, polyurethane, polyvinyl chloride (PVC), polyethylene terephthalate (PET), polysulfone, copolyester, polypropylene, or ethylene vinyl acetate (EVA).

[0058] As a result, it is possible for the user to monitor the internal conditions of the housing (100), so the user can check the process of the filter (F) being coated inside the housing (100) in real time.

[0059] The housing (100) can be connected to the area where the particle supply unit (200) is located, and accordingly, antimicrobial particles (AP) supplied from the particle supply unit (200) can be introduced into the interior of the housing (100).

[0060] For example, the particle supply unit (200) may be placed inside a chamber (drawing symbol not set) spaced apart from the housing (100), and the chamber and the housing (100) may be connected through a flow path, etc.

[0061] However, it is not limited to this, and the particle supply unit (200) may be positioned inside the housing (100) to directly supply antibacterial particles (AP) from inside the housing (100).

[0062] The housing (100) may be formed in the shape of a polygonal tube. For example, the housing (100) may be formed in the shape of a tube with a square cross-section and a hollow interior. However, it is not limited thereto, and the cross-section of the housing (100) may have various shapes such as a circle, an ellipse, or a polygon.

[0063] The particle supply unit (200) supplies antibacterial particles (AP) coated on the surface of the filter (F), and can supply antibacterial particles (AP) inside the housing (100).

[0064] The particle supply unit (200) can generate antimicrobial material into antimicrobial particles (AP) in an aerosol state using a spark discharge process.

[0065] The particle supply unit (200) may include electrodes (210) facing each other, and the electrodes (210) of the particle supply unit (200) may receive a high voltage from the outside. Accordingly, a spark discharge may occur between the electrodes (210) of the particle supply unit (200).

[0066] As a result, spark discharge occurs between the electrodes (210), causing the antimicrobial substance to evaporate at a high temperature and form fine antimicrobial particles (AP).

[0067] An antimicrobial material in which a spark discharge process is performed may be supplied to the particle supply unit (200). For example, the particle supply unit (200) may be supplied with an antimicrobial material comprising at least one of an antimicrobial metal such as silver (Ag), copper (Cu), zinc (Zn), an antimicrobial oxide such as titanium dioxide (TiO2), or a composite containing the same, and such antimicrobial material may be converted into a fine particle state and aerosolized during the spark discharge process and supplied to the interior of the housing (100).

[0068] The particle supply unit (200) may further include a control device (not shown), and the control device may control the spacing between the electrodes (210) of the particle supply unit (200), the magnitude of the applied voltage, the discharge time, etc., in order to control the size and concentration of the antibacterial particles (AP) generated during the spark discharge process.

[0069] For example, when the spacing between the electrodes (210) of the particle supply unit (200), the magnitude of the applied voltage, and the discharge time are appropriately adjusted, the size and concentration of the antimicrobial particles (AP) can be appropriately adjusted. As a result, the antimicrobial particles (AP) supplied into the housing (100) can be supplied at a preset concentration, and thereby the thickness or amount of the antimicrobial particles (AP) coated on the filter (F) can be adjusted.

[0070] Meanwhile, an ion supply unit (220) that supplies unipolar ions (UPI) may be disposed on the flow path of the antimicrobial particles (AP). For example, the ion supply unit (220) may be disposed inside the particle supply unit (200). Alternatively, the ion supply unit (220) may be disposed in a flow path connecting the particle supply unit (200) and the housing (100). However, it is not limited thereto, and the particle supply unit (200) may be disposed in various ways as long as the ion supply unit (220) is disposed on the flow path of the antimicrobial particles (AP).

[0071] When an ion supply unit (220) is placed on the flow path of an antimicrobial particle (AP), the unipolar ion (UPI) supplied from the ion supply unit (220) and the antimicrobial particle (AP) can be combined with each other. The unipolar ion (UPI) may be an anion, for example, but is not limited thereto, and the unipolar ion (UPI) may be a cation.

[0072] As a result, while the antimicrobial particles (AP) flow in the direction of the filter (F) inside the housing (100), the phenomenon of antimicrobial particles (AP) flowing adjacent to each other aggregating is reduced due to the electrical repulsion between the unipolar ions (UPI) bound to each antimicrobial particle (AP), so that the antimicrobial particles (AP) can be uniformly coated on the filter (F).

[0073] If unipolar ions (UPI) are not bound to the antimicrobial particles (AP), an attractive force acts between the antimicrobial particles (AP) dispersed in the air in aerosol form, causing them to aggregate.

[0074] For example, if unipolar ions (UPI) are not bound to the antimicrobial particles (AP), the antimicrobial particles (AP) dispersed in the air in aerosol form may aggregate due to mutual attraction caused by van der Waals forces such as dispersion force, dipole-dipole attraction, and flow dipole attraction, and / or electrostatic attraction and / or magnetic attraction and / or the casimir effect, and when the antimicrobial particles (AP) are coated on the filter (F) in this state, the uniformity of the coating may be reduced.

[0075] In contrast, when unipolar ions (UPI) emitted from the ion supply unit (220) are each bound to antimicrobial particles (AP) in an aerosol state, the antimicrobial particles (AP) can be charged with the same charge.

[0076] As a result, since an electrical repulsion can be applied between the antimicrobial particles (AP), the aggregation of the antimicrobial particles (AP) can be suppressed, thereby enabling the antimicrobial particles (AP) to be uniformly coated on the filter (F).

[0077] Meanwhile, the ion supply unit (220) may include at least one of a corona discharge generator, a needlepoint ionizer, a plasma ion generator, an electrostatic discharge ionizer, a high-voltage discharge device, an electrostatic induction ionizer, a UV photoionization device, an electrospray ionizer, a filament ionizer, or a field emission ionizer.

[0078] Meanwhile, a dry coating device (1) according to one embodiment of the present invention may further include a flow guide section (400) that guides the flow path of air. The flow guide section (400) can guide the flow path of air so that the air inside the housing (100) flows in the direction of the filter (F) along the third direction (D3).

[0079] For example, the flow guide (400) can generate an air current (GF), such as convection of air inside the housing (100), so that a gas, such as air containing antibacterial particles (AP) inside the housing (100), flows in the direction of the filter (F).

[0080] The flow guide section (400) may be located in an area opposite to the area where the filter (F) is located relative to the particle supply section (200) (hereinafter referred to as the 'rear area'). The flow guide section (400) may generate an airflow (GF) so that air flows in the direction where the filter (F) is located in the rear area of ​​the particle supply section (200).

[0081] For example, the flow guide (400) can generate an airflow (GF) by receiving power from the outside so that the air inside the housing (100) flows along the third direction (D3).

[0082] As a result, the antibacterial particles (AP) generated in the particle supply unit (200) flow toward the filter (F) due to the airflow (GF) generated in the flow guide unit (400), and the antibacterial particles (AP) can combine with the unipolar ions (UPI) generated in the ion supply unit (220).

[0083] In addition, antibacterial particles (AP) combined with unipolar ions (UPI) flow to the filter (F) by means of the airflow (GF) generated in the flow guide section (400), so that they can be uniformly coated on all areas of the filter (F).

[0084] The flow guide section (400) may be composed of various devices capable of generating airflow (GF) inside the housing (100). For example, the flow guide section (400) may be composed of a fan, a blower, an air pump, a bypass duct, a jet nozzle, a swirl generator, a turbulence inducer, an air diffuser, or an air injector.

[0085] Meanwhile, the distance between the filter (F) and the ion wind generating unit (300) may be smaller than the distance between the particle supply unit (200) and the ion wind generating unit (300). For example, the distance between the ion wind generating unit (300) and the particle supply unit (200) may be at least three times or five times the distance between the ion wind generating unit (300) and the filter (F).

[0086] As a result, the antimicrobial particles (AP) in aerosol state supplied from the particle supply unit (200) and the unipolar ions (UPI) combined therewith can flow to the ion wind generating unit (300) in a sufficiently diffused state without aggregating with each other inside the housing (100).

[0087] However, some of the antimicrobial particles (AP) and the unipolar ions (UPI) combined therewith may lose charge and re-aggregate while flowing from the particle supply unit (200) to the ion wind generation unit (300). As a result, there is a concern that the antimicrobial particles (AP) may not be uniformly coated on the filter (F).

[0088] However, according to one embodiment of the present invention, the dry coating device (1) includes an ion wind generating unit (300) to filter out antibacterial particles (AP) that have lost charge and aggregated, and to secondarily and uniformly charge the antibacterial particles (AP), thereby reducing the phenomenon of antibacterial particles (AP) flowing adjacent to each other aggregating together, and allowing the antibacterial particles (AP) to be uniformly coated on the filter (F).

[0089] Referring to FIG. 3 together with FIG. 1 and FIG. 2, the ion wind generating unit (300) may include a rotating unit (310) located within a housing (100) and a counter electrode (330) positioned to be in contact with the inner surface of the housing (100).

[0090] The rotating part (310) rotates in one direction with respect to the center (C) and can generate wind when rotating. For example, the rotating part (310) may include a blade and may have a shape similar to a fan blade.

[0091] The rotating part (310) includes a plurality of blades extending from the center (C) and electrode pins (320) each connected to the plurality of blades, and the electrode pins (320) can protrude in a direction parallel to the one direction in which the plurality of blades rotate.

[0092] Specifically, an electrode pin (320) is positioned on one side of the rotating part (310), and the electrode pin (320) can generate a corona discharge by receiving voltage from the power supply unit (340). An ion wind is generated by the corona discharge, and the rotating part (310) can rotate by the ion wind. Therefore, as the ion wind becomes stronger, the rotational speed of the rotating part (310) increases, and the flow rate of air generated by this can also increase.

[0093] The power supply unit (340) can supply current to the center (C) of the ion wind generating unit (300) through the connection unit (350). Accordingly, the connection unit (350) may include a material with excellent electrical conductivity, such as copper, silver, gold, aluminum, iron, or nickel, but is not limited thereto.

[0094] The current supplied to the center (C) through the connection part (350) can flow to the electrode pin (320) located on one side of the rotating part (310) through a wire, etc. For example, a groove is formed in the rotating part (310) in which a wire can be seated, and the wire can be seated in the groove.

[0095] Meanwhile, the electrode pin (320) may be coupled to the rotating part (310) so as to protrude toward the opposing electrode (330) from one side of the rotating part (310).

[0096] When the electrical energy of the current supplied to the electrode pin (320) becomes sufficient to cause a corona discharge, a corona discharge may occur around the electrode pin (320).

[0097] Corona discharge is a discharge phenomenon that occurs around a conductor to which high voltage is applied. When corona discharge occurs in a region of the conductor with a strong electric field, the ionization of air molecules surrounding the conductor takes place. These ionized ions and electrons can collide with other air molecules, causing further ionization. The flow of air particles generated by corona discharge in this way is called an ion wind.

[0098] In addition, for corona discharge to occur, the charge must be concentrated in a narrow space. That is, corona discharge can occur when the charge is concentrated at the end or sharp edge of the conductor. Therefore, the shape of the electrode pin (320) may be a needle-shaped with a pointed end. Alternatively, the shape of the electrode pin (320) may be any shape in which the width of the electrode pin (320) narrows as it moves away from the rotating part (310) and the contact surface, such as a saw blade shape or a snowflake shape.

[0099] For corona discharge to occur at the electrode pin (320), the electrode pin (320) needs to have excellent electrical conductivity. The electrode pin (320) may include materials with excellent electrical conductivity, such as copper, silver, gold, aluminum, iron, conductive polymer, conductive metal oxide, alloy, etc., but is not limited thereto.

[0100] Meanwhile, the torque (τ) applied to the rotating part (310) as a reaction to the blowing ion wind can be defined as the product of the reaction force (F) applied by the ion wind to the rotating part (310), the distance (d) from the center (C) to the electrode pin (320), and the sin value of the angle (θ) formed by the protruding direction of the electrode pin (320) and the length direction of the rotating part (310). This can be expressed as a formula as follows.

[0101] τ=Fdsinθ

[0102] Accordingly, if the angle (θ) formed by the protrusion direction of the electrode pin (320) and the length direction of the rotating part (310) becomes smaller, the torque acting as a reaction of the ion wind on the rotating part (310) can be reduced. If the torque acting on the rotating part (310) becomes smaller, the flow rate of the ion wind generating part (300) can be reduced. Accordingly, the angle (θ) formed by the protrusion direction of the electrode pin (320) and the length direction of the rotating part (310) can be 60° to 90°.

[0103] Meanwhile, the rotating part (310) may be coupled with at least one electrode pin (320) that generates a corona discharge. The number of electrode pins (320) coupled to the rotating part (310) may vary depending on the embodiment of the ion wind generating part (300). For example, in the case of a small ion wind generating part (300) with a small volume, a small number of electrode pins (320) may be coupled to the rotating part (310), but in the case of a large ion wind generating part (300) with a large volume, a number of electrode pins (320) may be coupled to the rotating part (310).

[0104] Additionally, the number of blades included in the rotating part (310) may vary depending on the embodiment of the ion wind generating part (300). For example, in the case of a small ion wind generating part (300) with a small volume, the number of blades may be small, but in the case of a large ion wind generating part (300) with a large volume, the number of blades may be large.

[0105] Meanwhile, the rotating part (310) may be surrounded by a counter electrode (330). The counter electrode (330) may have a potential opposite to that of the electrode pin (320) or may be grounded.

[0106] Accordingly, the electric field lines between the electrode pin (320) and the counter electrode (330) generated by the voltage applied to the electrode pin (320) from the power supply (340) may go from the electrode pin (320) to the counter electrode (330) or from the counter electrode (330) to the electrode pin (320).

[0107] For example, if the voltage applied to the electrode pin (320) from the power supply unit (340) is a positive voltage, the electric field line may go from the electrode pin (320) to the counter electrode (330). On the other hand, if the voltage applied to the electrode pin (320) from the power supply unit (340) is a negative voltage, the electric field line may go from the counter electrode (330) to the electrode pin (320).

[0108] When electric field lines are formed as described above, the ion wind generated by the corona discharge can be blown from the electrode pin (320) to the counter electrode (330) along the electric field lines, and as the rotating part (310) rotates due to the ion wind, an airflow can be generated.

[0109] In this way, when corona discharge occurs in the ion wind generating unit (300), the antibacterial particles (AP) can be secondarily charged in the ion supply unit (220).

[0110] Specifically, some antimicrobial particles (AP) and unipolar ions (UPI) combined therewith may lose charge and re-aggregate while flowing from the particle supply unit (200) to the ion wind generation unit (300). When corona discharge occurs in the ion wind generation unit (300), the aggregated antimicrobial particles (AP) may be secondary charged, and since the size of the aggregated antimicrobial particles (AP) is relatively larger than the size of the non-aggregated antimicrobial particles (AP), the aggregated antimicrobial particles (AP) may be more charged than the non-aggregated antimicrobial particles (AP).

[0111] As a result, due to the electric field formed between the aforementioned electrode pin (320) and the counter electrode (330), aggregated antimicrobial particles (AP) flowing inside the housing (100) and passing through the ion wind generating part (300) receive an electric force in the direction of the counter electrode (330), and can be captured and filtered by the counter electrode (330).

[0112] In addition, even if a corona discharge occurs in the ion wind generating unit (300) and a secondary charge is generated, the amount of charge is not large, so the antimicrobial particles (AP) are not captured by the counter electrode (330), and the antimicrobial particles (AP) that flow adjacent to each other due to electrical repulsion are better dispersed and pass through the ion wind generating unit (300), so that the antimicrobial particles (AP) can be uniformly coated on the filter (F).

[0113] Thus, according to one embodiment of the present invention, the dry coating device (1) includes an ion wind generating unit (300) to secondarily charge the antibacterial particles (AP), thereby filtering the antibacterial particles (AP) that have lost charge and aggregated at the counter electrode (330), reducing the phenomenon of antibacterial particles (AP) flowing adjacent to each other aggregating together, and allowing the antibacterial particles (AP) to be uniformly coated on the filter (F).

[0114] Meanwhile, in conventional ion wind generators, the electrode that causes corona discharge and the rotating part that induces airflow were separated from each other, and a collection part for capturing charged particles contained in the ion wind also existed separately.

[0115] Furthermore, in conventional ion wind generators, as the air flow rate increased, the time it took for air to pass through the charging section, which was separated from the rotating section, became shorter. Consequently, the time available for antimicrobial particles (AP) in the air to be charged by corona discharge was reduced. In other words, as the air flow rate increased, the antimicrobial particles (AP) in the air were not sufficiently charged.

[0116] On the other hand, in an ion wind generating unit (300) according to one embodiment of the present invention, an electrode pin (320), which is a charging unit capable of generating corona discharge, and a rotating unit (310), which is capable of generating airflow, are integrated, and a counter electrode (330), which is capable of capturing charged aggregated antimicrobial particles (AP), is arranged to surround the rotating unit (310) on the inner surface of the housing (100), so that the capture rate of aggregated antimicrobial particles (AP) can be increased even when the air flow rate increases. This will be described later in FIGS. 4 and FIGS. 5.

[0117] Meanwhile, if the voltage applied from the power supply unit (340) to the electrode pin (320) increases, corona discharge occurs more easily and the air flow rate may increase, but the rotational angular velocity of the rotating unit (310) increases significantly, and there is a risk that the ion wind generating unit (300) will be damaged. Therefore, the voltage applied from the power supply unit (340) to the electrode pin (320) must have a value sufficient to cause corona discharge, but a value such that the ion wind generating unit (300) is not damaged.

[0118] Meanwhile, the coupling part (500) according to one embodiment of the present invention may include a main body part (510) and a rail part (520) for fixing the filter (F) to the housing (100).

[0119] The connecting part (500) can be movably connected to one side of the housing (100). Specifically, the main body part (510) can be movably positioned on one side of the housing (100), and the main body part (510) can slide along the rail part (520) in a third direction (D3).

[0120] The main body (510) may be located inside the housing (100), and one side of the main body (510) may selectively come into contact with the filter (F).

[0121] The rail portion (520) may be formed to extend along the longitudinal direction of the housing (100), and the rail portion (520) may be connected to the inner circumference of the housing (100).

[0122] The main body (510) is connected to the rail section (520), and a movement path can be guided along the extension direction of the rail section (520). By moving along the movement path guided by the rail section (520), the main body (510) can selectively come into contact with a filter (F) that is seated inside the housing (100).

[0123] As a result, the main body (510) comes into contact with the filter (F) along the rail (520), thereby restricting the movement of the filter (F). By moving the main body (510) toward the filter (F) and fixing the filter (F) in position inside the housing (100), the coating process for the filter (F) can be performed stably.

[0124] That is, before the start of the coating process, the filter (F) is introduced into the aforementioned opening along the second direction (D2), and the main body (510) is moved toward the filter (F) to fix the filter (F) in position inside the housing (100) to perform the coating process. When the coating process is completed, the main body (510) is moved toward the opposite side of the filter (F), and then the filter (F) is removed from the housing (100) to recover the coated filter (F).

[0125] According to one embodiment, the direction of movement of the coupling part (500) may be the same as the length direction of the housing (100), and the filter (F) may be located between the ion wind generating part (300) and the coupling part (500).

[0126] As a result, the connecting part (500) moves along the longitudinal direction of the housing (100) and presses against the filter (F), thereby positioning the filter (F) so that one side of the filter (F) faces the side where the ion wind generating part (300) is located, so that the coating of antibacterial particles (AP) on the said side of the filter (F) can be performed efficiently.

[0127] The rail portion (520) guides the movement path of the main body portion (510) and may be formed in the shape of a rail extending along the third direction (D3). For example, the rail portion (520) may form a groove extending along the third direction (D3) on the inner circumference of the housing (100), and the main body portion (510) may be formed as a rib inserted into the groove. However, it is not limited thereto, and the rail portion (520) may be formed in various shapes or devices capable of guiding the movement direction of the main body portion (510).

[0128] For example, the rail section (520) may be composed of a rail guide, a linear slide, a ball bearing guide, a roller guide, a track system, a V-guide, a slot guide, a linear bushing, a sliding bearing, a telescopic guide, a cam follower, and a friction pad.

[0129] Figure 4 is a graph showing the rotational angular velocity of the rotating part according to the position of the electrode pin of the ion wind generating part of Figure 3, and Figure 5 is a graph showing the rotational angular velocity of the rotating part according to the length of the electrode pin of the ion wind generating part of Figure 3.

[0130] When the distance from the center (C) of the ion wind generating part (300) to the counter electrode (330) is R, the distance from the center (C) of the ion wind generating part (300) to the electrode pin (320) is d, and the length of the electrode pin (320) is h, the ratio of the distance from the center (C) of the ion wind generating part (300) to the distance from the center (C) of the ion wind generating part (300) to the electrode pin (320) is d * (d *Defined as =d / R), the ratio of the distance from the center (C) of the ion wind generating part (300) to the counter electrode (330) and the length of the electrode pin (320) is h * (h * It is defined as =h / R).

[0131] In one embodiment of the present invention, the ion wind generating unit (300) rotates due to the reaction of the ion wind generated by corona discharge, and the antibacterial particles (AP) can be collected on the counter electrode (330) along with the ion wind.

[0132] Therefore, an increase in the rotational angular velocity of the rotating part (310) means that more ion wind is generated. That is, when the rotational angular velocity of the rotating part (310) increases, more aggregated antimicrobial particles (AP) can be captured on the counter electrode (330), and unaggregated antimicrobial particles (AP) passing through the ion wind generating part (300) can be dispersed better as more secondary charges are generated.

[0133] Referring to Fig. 4 together with Fig. 3, d * As the size increases, the rotational angular velocity of the rotating part (310) increases, and then d * It can be seen that as it gets larger, the rotational angular velocity of the rotating part (310) decreases again.

[0134] This is, d * In the case where is small, the torque applied to the rotating part (310) is reduced due to the influence of distance, so the rotational angular velocity of the rotating part (310) can be interpreted as being small, and d * If the angle is too large, the electric field from the electrode pin (320) to the counter electrode (330) bends, and the angle of distortion of the electric field becomes smaller, which can be interpreted as the rotational angular velocity of the rotating part (310) becoming smaller.

[0135] Therefore, d * d can be 0.1 to 0.8. * If is less than 0.1, the rotational angular velocity of the rotating part (310) decreases due to the influence of distance, while d *If α becomes greater than 0.8, the rotational angular velocity of the rotating part (310) may decrease due to the influence of the electric field distortion angle. As an optional embodiment, d * It can be 0.2 to 0.6 or 0.3 to 0.5.

[0136] That is, d * When the value is 0.1 to 0.8, the ion wind generating unit (300) secondary charges the antibacterial particles (AP), and accordingly, the antibacterial particles (AP) that have lost charge and aggregated are filtered at the counter electrode (330), and the antibacterial particles (AP) flowing adjacent to each other are dispersed so that the antibacterial particles (AP) can be uniformly coated on the filter (F).

[0137] Meanwhile, it was confirmed that the rotational angular velocity of the rotating part (310) is greater when the current applied by the power supply unit (340) is 70μA than when the current applied by the power supply unit (340) is 40μA, and the rotational angular velocity of the rotating part (310) is greatest when the current applied by the power supply unit (340) is 100μA. This is because when the current applied by the power supply unit (340) increases, more corona discharge occurs at the electrode pin (320).

[0138] Referring to Fig. 5 together with Fig. 3, h * It can be seen that as the size increases, the rotational angular velocity of the rotating part (310) decreases.

[0139] The relationship between the length of the electrode pin (320) and the rotational angular velocity of the rotating part (310) can be determined through mathematical modeling as follows.

[0140]

[0141] (w is the rotational angular velocity of the rotating part (310), k is a proportionality constant, I is the current applied by the power supply part (340), d is the distance from the center (C) to the electrode pin (320), R is the distance from the center (C) to the counter electrode (330), and h is the length of the electrode pin (320).)

[0142] As can be seen from the formula, w decreases as h increases. In other words, as h increases, w decreases, and as w decreases, the air flow rate decreases, which may reduce the capture efficiency of aggregated antimicrobial particles (AP).

[0143] Meanwhile, if h becomes too small, corona discharge may not occur well in the electrode pin (320). As previously mentioned, corona discharge occurs when there is a concentration of charge in a pointed shape, but if the length of the electrode pin (320) is too small, there may not be enough concentration of charge to generate corona discharge.

[0144] Therefore, h * can be 0.05 to 0.5. If h * If ga is less than 0.05, corona discharge may not occur sufficiently at the electrode pin (320), and h * If α is greater than 0.5, the rotational angular velocity of the rotating part (310) decreases, and the capture efficiency of aggregated antimicrobial particles (AP) may decrease. As an optional embodiment, h * is 0.1 to 0.4 or h * It can be 0.15 to 0.35.

[0145] That is, h * When the value is 0.05 to 0.5, the ion wind generating unit (300) secondary charges the antibacterial particles (AP), and accordingly, the antibacterial particles (AP) that lose charge and aggregate are filtered at the counter electrode (330), and the antibacterial particles (AP) flowing adjacent to each other are dispersed so that the antibacterial particles (AP) can be uniformly coated on the filter (F).

[0146] Meanwhile, referring to FIG. 5, as the current applied by the power supply unit (340) increases, the rotational angular velocity of the rotating unit (310) increases, which is not explained again as it has been previously described.

[0147] FIG. 6 is a cross-sectional view taken from the side of another example of a dry coating device for a filter according to one embodiment of the present invention.

[0148] Referring to FIG. 6, the dry coating device according to another embodiment of the present invention further includes an electric field application unit (610', 620') that forms an electric field inside a housing (100'). Since the configuration, operating principle, and effect are the same as those of the dry coating device (1) according to one embodiment of the present invention, the description within the scope of overlap is omitted.

[0149] Specifically, a dry coating device according to another embodiment of the present invention may include a housing (600'), a particle supply unit (200'), an ion wind generating unit (300'), a flow guide unit (400'), a coupling unit (500'), and an electric field application unit (610', 620').

[0150] The electric field application unit (610', 620') may include a first electrode (610') and a second electrode (620') that form an electric field inside the housing (100'). The first electrode (610') and the second electrode (620') have different polarities and can form an electric field having electric field lines in a third direction (D3) inside the housing (100'). For example, the first electrode (610') may be an electrode having a negative charge, and the second electrode (620') may be an electrode having a positive charge.

[0151] An ion wind generating unit (300') and a filter (F) may be disposed between the first electrode (610') and the second electrode (620'). For example, the first electrode (610') may be disposed at a position opposite to the filter (F) with respect to the ion wind generating unit (300'), and the second electrode (620') may be disposed at a position opposite to the ion wind generating unit (300') with respect to the filter (F).

[0152] For example, the first electrode (610') and the second electrode (620') can form an electric field directed from the filter (F) toward the particle supply unit (200'), and the antibacterial particles (AP) emitted from the particle supply unit (200') and the negatively charged unipolar ions (UPI) combined therewith can flow from the particle supply unit (200') toward the filter (F) by receiving the force of the electric field.

[0153] As a result, the unipolar ions (UPI) released from the particle supply unit (200') and bound to the antibacterial particles (AP) can move in a third direction (D3) by receiving the force of the electric field generated by the electric field application unit (610', 620'), and as a result, the antibacterial particles (AP) can be stably coated on the filter (F).

[0154] Each of the embodiments described above can be implemented independently, but it goes without saying that the structure of each embodiment can be applied in combination to other embodiments.

[0155] As such, the present invention has been described with reference to the embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims.

[0156] The specific practices described in the embodiments are examples and do not limit the scope of the embodiments in any way. Furthermore, unless specifically stated as "essential," "importantly," etc., components may not be strictly necessary for the application of the present invention.

[0157] In the specification of the embodiments (particularly in the claims), the use of the term "above" and similar descriptive terms may be in both singular and plural.

[0158] In addition, where a range is described in the embodiments, it includes an invention applying individual values ​​belonging to said range (unless otherwise stated), and is equivalent to describing each individual value constituting said range in the detailed description.

[0159] Finally, regarding the steps constituting the method according to the embodiment, unless the order is explicitly stated or contradicted, said steps may be performed in a suitable order. The embodiments are not necessarily limited to the order in which said steps are described.

[0160] In the embodiments, the use of all examples or exemplary terms is merely for the purpose of describing the embodiments in detail, and the scope of the embodiments is not limited by said examples or exemplary terms unless limited by the claims.

[0161] In addition, those skilled in the art will understand that various modifications, combinations, and changes may be configured according to design conditions and factors within the scope of the patent claims or equivalents to which they are added.

[0162] According to one embodiment of the present invention, a dry coating apparatus for a filter is provided. Furthermore, embodiments of the present invention may be applied to industrially used filter manufacturing apparatus, etc.

Claims

1. A housing having a filter detachably disposed inside and a hollow inside; A particle supply unit that supplies antibacterial particles into the interior of the above housing; An ion supply unit for charging the above antimicrobial particles; and A dry coating device for a filter comprising: an ion wind generating unit disposed between the particle supply unit and the filter inside the housing and secondary-charging the antibacterial particles.

2. In Paragraph 1, So that the air inside the housing flows toward the filter, A dry coating device for a filter further comprising a flow guide section that guides the air flow path.

3. In Paragraph 1, The above ion supply unit is a dry coating device for a filter located inside the above particle supply unit.

4. In Paragraph 1, A dry coating device for a filter in which the distance between the filter and the ion wind generating unit is smaller than the distance between the particle supply unit and the ion wind generating unit.

5. In Paragraph 1, The above ion wind generating unit is, A rotating part that rotates in one direction around a center; and It includes a power supply unit that applies voltage to the above-mentioned rotating part; and The above-mentioned rotating part includes a plurality of blades extending from the center and electrode pins each coupled to the plurality of blades, and A dry coating device for a filter in which the electrode pins protrude in a direction parallel to the one direction in which the plurality of blades rotate, and when voltage is applied to the electrode pins, the electrode pins generate an ion wind, and the blades rotate in the one direction by the ion wind.

6. In Paragraph 5, A dry coating device for a filter further comprising a counter electrode surrounding the plurality of blades.

7. In Paragraph 6, The above-mentioned counter electrode is a dry coating device for a grounded filter.

8. In Paragraph 6, A dry coating device for a filter in which the ratio of the distance from the center to the electrode pin to the distance from the center to the counter electrode is 0.1 to 0.

8.

9. In Paragraph 6, A dry coating device for a filter in which the ratio of the height of the electrode pin to the distance from the center to the counter electrode is 0.05 to 0.

5.

10. In Paragraph 1, A dry coating device for a filter, further comprising an electric field application unit that applies electric force to the air so that the air flows from the particle supply unit toward the filter by receiving power from an external source.

11. Housing with a filter detachably disposed inside; A particle supply unit that supplies antibacterial particles into the interior of the above housing; A flow guide portion that guides the flow path of the air so that the air inside the housing flows in the direction of the filter; and A dry coating device for a filter comprising: an ion wind generating unit disposed inside the housing, disposed between the particle supply unit and the filter, and charging the antibacterial particles.

12. In Paragraph 11, It further includes a coupling part that fixes the above filter, and The above filter is a dry coating device for a filter located between the ion wind generating part and the coupling part.

13. In Paragraph 12, The above-mentioned coupling part includes a main body part and a rail part, and The above main body is a dry coating device for a filter that slides along the rail.

14. In Paragraph 11, A dry coating device for a filter further comprising an ion supply unit for charging the above antibacterial particles.

15. In Paragraph 11, A dry coating device for a filter in which the distance between the filter and the ion wind generating unit is smaller than the distance between the particle supply unit and the ion wind generating unit.

16. In Paragraph 11, The above ion wind generating unit is, A rotating part that rotates in one direction around a center; and It includes a power supply unit that applies voltage to the above-mentioned rotating part; and The above-mentioned rotating part includes a plurality of blades extending from the center and electrode pins each coupled to the plurality of blades, and A dry coating device for a filter in which the electrode pins protrude in a direction parallel to the one direction in which the plurality of blades rotate, and when voltage is applied to the electrode pins, the electrode pins generate an ion wind, and the blades rotate in the one direction by the ion wind.

17. In Paragraph 16, A dry coating device for a filter further comprising a counter electrode surrounding the plurality of blades.

18. In Paragraph 17, A dry coating device for a filter in which the ratio of the distance from the center to the electrode pin to the distance from the center to the counter electrode is 0.1 to 0.

8.

19. In Paragraph 17, A dry coating device for a filter in which the ratio of the height of the electrode pin to the distance from the center to the counter electrode is 0.05 to 0.

5.

20. In Paragraph 17, The above-mentioned counter electrode is a dry coating device for a grounded filter.

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