KR20200064671A - Plasma sterilizing module and air purifier including for the same - Google Patents

Abstract

The present invention relates to a plasma sterilization module which comprises: a housing installed on a flow path through which air is circulated, having first open surface from which the air is supplied, and having a second open surface facing the first surface and from which the air is discharged; a discharge electrode installed in the housing; and an earth electrode installed in the housing and disposed to be spaced apart from the discharge electrode. The discharge electrode receives high voltage to generate plasma discharge toward the earth electrode between the first and second surfaces. The discharge electrode and the earth electrode allow the air received through the first surface to directly pass through a region, in which the plasma discharge is generated, to be discharged to the second surface. Accordingly, the plasma sterilization module sterilizes microorganisms in the air.

Description

Plasma sterilizing module and air purifier including for the same

The present invention relates to a plasma sterilization module and an air cleaner having the same, and more particularly, to a plasma sterilization module for sterilizing contaminated air using plasma discharge and an air cleaner having the same.

An air purifier refers to a device that purifies contaminated air and converts it into fresh air. It impregnates contaminated air with a fan to collect fine dust or bacteria by a filter, and deodorizes odors such as body odor and cigarette smell. do.

Such an air purifier is required to effectively remove contaminants in the air. In addition, it is required to increase the air cleaning capacity while occupying less space when placed indoors.

To this end, methods for performing sterilization using plasma discharge have been proposed.

For example, the prior art 1 (Korean Patent Publication No. 10-2007-0094026) relates to an air conditioning apparatus in which a discharge unit and a heat exchanger are arranged in an air passage, wherein the discharge unit is a streamer that is a type of plasma discharge. Discharge improves the decomposition efficiency of the components to be treated.

In addition, prior art 2 (Korean Patent Publication No. 10-2006-0085647) also proposes an air purifying device using streamer discharge.

However, rather than performing the sterilization treatment by passing air through an area where the streamer discharge occurs, the prior arts generate radicals by streamer discharge and perform sterilization treatment by diffusion phenomenon of the radicals, thereby sterilizing performance. There is a problem that is difficult to improve.

In addition, in order to improve the sterilization treatment performance, the discharge intensity must be increased or the number of discharge units must be increased, and in this case, there is a problem that ozone having a concentration of 30 ppb (billion percent) or more according to the air cleaning standard is generated.

In addition, a catalyst means is required to improve the sterilization treatment performance by the radicals, and the catalyst means is disposed in a direction perpendicular to the air passage on the discharge side. Accordingly, there is a problem in that the differential pressure is increased by interfering with the air flow, and the structure of the discharge unit disclosed in the prior arts prevents the air flow and increases the differential pressure.

In addition, there are restrictions on the shape of the discharge unit, and accordingly, there is a problem that it is difficult to apply to various types of air cleaners.

Prior Literature 1: Korean Patent Publication No. 10-2007-0094026 Prior Literature 2: Korean Patent Publication No. 10-2006-0085647

The problem to be solved by the present invention is to provide a plasma sterilization module that improves sterilization performance by forming a plasma discharge region in a flow path through which air flows and sterilizing microorganisms in the air by electric charge.

Another object of the present invention is to improve the sterilization treatment performance by sterilizing microorganisms by electric charge, thereby reducing the concentration of ozone generated by plasma discharge, thereby providing a plasma sterilization module conforming to air cleaning standards for ozone. will be.

Another object of the present invention is to provide a plasma sterilization module that does not require a separate catalyst means for sterilizing microorganisms by electric charge and causing a differential pressure increase.

Another object of the present invention is to provide a plasma sterilization module that is installed on a flow path through which air flows while minimizing the differential pressure between the upstream and downstream flow paths.

Another object of the present invention is to provide a plasma sterilization module capable of being applied to air cleaners and air conditioners of various shapes by increasing the degree of freedom of shape, and to apply a plurality of modules to the air cleaners and air conditioners.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the plasma sterilization module according to an embodiment of the present invention is installed on a flow path through which air flows, and a first surface through which the air flows in and air flowing in and facing the first surface are discharged. It includes a two-sided housing, a discharge electrode installed in the housing, and a ground electrode installed in the housing and spaced apart from the discharge electrode.

The discharge electrode is applied with a high voltage to generate a plasma discharge toward the ground electrode between the first surface and the second surface, and the discharge electrode and the ground electrode allow air introduced into the first surface to discharge the plasma. It is disposed to be discharged to the second surface through the generated region.

In the discharge electrode and the ground electrode, a region in which the plasma discharge is generated may be disposed to intersect the flow path of the air.

The discharge electrode and the ground electrode may be arranged in an orthogonal direction in which the plasma discharge region and the air flow direction.

The housing may be formed such that the circumferential surfaces forming the opened first and second surfaces are parallel to the flow path through which air flows.

The discharge electrode and the ground electrode may be disposed parallel to the circumferential surface of the housing.

The discharge electrode may include a plurality of discharge electrode plates arranged to be spaced apart from each other, and a plurality of discharge needles provided in each of the plurality of discharge electrode plates and generating the plasma discharge. It may include at least one opposing electrode plate disposed between the plurality of discharge electrode plates spaced apart.

The discharge electrode plate and the counter electrode plate may be disposed parallel to the circumferential surface of the housing forming the first surface and the second surface.

The discharge needle may have two tip portions symmetrical to each other.

The ground electrode may include a plurality of counter electrode plates.

The discharge electrode may include a discharge electrode support connected to the plurality of discharge electrode plates and installed to be supported on the housing, and the ground electrode may be connected to the opposite electrode plate and provided to be supported on the housing. It may include a support.

The plurality of discharge electrode plates and the plurality of opposing electrode plates may have the same distance between the discharge electrode plates adjacent to each other and the opposing electrode plates.

The plurality of discharge needles positioned between the plurality of opposite electrode plates protrude toward the opposite electrode plate, and alternately opposite electrode plates disposed inside and outside the discharge electrode plate provided with the plurality of discharge needles alternately. Each can be projected toward.

The discharge electrode plate disposed on the outermost side of the plurality of discharge electrode plates may be disposed outside the counter electrode plate disposed on the outermost side of the plurality of counter electrode plates, and provided on the discharge electrode plate disposed on the outermost side. The plurality of discharge needles can be projected toward the opposite electrode plate disposed at the outermost side.

The housing may be formed in a cylindrical shape in which the first and second surfaces are opened, and the discharge electrode may include a plurality of ring-shaped discharge electrode plates concentric around the central axis of the housing, and the ground electrode The silver housing may include a plurality of opposite electrode plates having a ring shape concentrically around a central axis of the housing.

The housing protrudes inward from the inner circumferential surface, and is located at one of the first surface and the second surface, and a center surface of the first surface and the second surface. And a hub ring, and radial spokes connecting the edge surface and the hub ring.

The discharge electrode may include a voltage application part to which a high voltage is applied and seated on the hub ring, and a discharge electrode plate located at the outermost of the plurality of discharge electrode plates may be mounted on the edge surface, and the discharge electrode The support part connects the voltage applying part and the plurality of discharge electrode plates, and may be seated on the spoke.

The housing may be formed with a guide groove that enters outward from an inner circumferential surface on the other surface of the first surface and the second surface, and the ground electrode support part connects the plurality of counter electrode plates and an outer end of the guide groove Can be seated on.

The circumferential surface of the housing may have a rectangular cross-section, and the discharge electrode plate and the counter electrode plate may be disposed parallel to a pair of opposing surfaces of the circumferential surface of the housing.

The discharge electrode is formed of stainless steel, and at least a portion of the outer surface may be plated with a nickel-cobalt alloy.

The discharge electrode may be applied with a positive high voltage to generate a streamer discharge toward the ground electrode.

The plasma sterilization module may include a plurality of discharge modules each including the housing, the discharge electrode, and the ground electrode, and the plurality of discharge modules are disposed parallel to each other on a flow path through which the air flows, and upstream. The second surface of the discharge module disposed on the side and the first surface of the discharge module disposed on the downstream side may be disposed to face each other.

Alternatively, the plasma sterilization module according to an embodiment of the present invention may be provided in an air cleaner.

The air purifier controls a flow direction of the air discharged from the discharge grill and a main fan generating air flow and a discharge grill having a concave downward discharge grill for discharging air passing through the main fan And it may include a flow conversion device that is movably provided, the plasma sterilization module may be installed in the flow conversion device.

Alternatively, the plasma sterilization module according to the embodiment of the present invention may be provided in the air conditioner.

Details of other embodiments are included in the detailed description and drawings.

According to the plasma sterilization module of the present invention, there are one or more of the following effects.

First, the 　 discharge electrode and the ground electrode are arranged such that air passes through a region in which plasma discharge occurs, and as microorganisms in the air pass through the plasma discharge region, electric charges accumulate on the cell wall, and the microbial cell wall collapses due to the Coulomb force caused by the charge. It has the advantage of being sterilized and improving the sterilization treatment performance.

Second, there is also an advantage in that the disinfection performance is improved than the discharge unit by conventional radical diffusion, thereby reducing the concentration of ozone generated by plasma discharge.

Third, by sterilizing the microorganisms by electric charge, no separate catalyst means is required, and the housing on which the first surface to which the air flows in and the second surface opposite to the first surface and through which the air is discharged are opened is on the flow path through which air flows. Is installed, the discharge electrode and the ground electrode is disposed so that the air passes through the region where the plasma discharge occurs, there is also an advantage of improving the sterilization performance and blowing performance by reducing the differential pressure upstream and downstream of the air flow path.

Fourth, the discharge electrode includes a discharge needle for generating plasma discharge, a plurality of discharge electrode plates on which the discharge needle is disposed, and a discharge electrode support for connecting the discharge electrode plate, and the ground electrode is disposed between the discharge electrode plates. Including a plurality of opposing electrode plates and a ground electrode support for connecting the opposing, it can be manufactured in a structure in which the shape is repeated, thereby increasing the degree of freedom of the shape and applicable to various types of air purifiers and air conditioners. There is an advantage that the module can be applied to an air purifier and an air conditioner.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a conceptual view showing the front of an air cleaner having a plasma sterilization module according to an embodiment of the present invention.
FIG. 2 is a conceptual view showing a side surface of the air cleaner shown in FIG. 1.
3 and 4 are perspective views of the plasma sterilization module according to the first embodiment of the present invention.
5 is an exploded perspective view of the plasma sterilization module shown in FIG. 4.
6 is a perspective view of the discharge electrode illustrated in FIG. 5.
7 is a plan view of a plasma sterilization module according to a first embodiment of the present invention.
8 is a bottom view of the plasma sterilization module according to the first embodiment of the present invention.
9 is a conceptual view showing air passing through a plasma discharge region generated in a part of a plasma sterilization module according to an embodiment of the present invention.
10 is a conceptual diagram showing the type of plasma discharge, (a) is a positive voltage is applied to the discharge electrode, (b) is a conceptual diagram when a negative voltage is applied to the discharge electrode.
11 is a conceptual diagram showing the principle of sterilization of air passing through a plasma discharge region.
12 is a perspective view showing a plasma sterilization module according to a second embodiment of the present invention.
13 is a perspective view illustrating a plasma sterilization module according to a third embodiment of the present invention.
14 is a plan view of a plasma sterilization module according to a third embodiment of the present invention.
15 is an enlarged view of region A shown in FIG. 14.
16 is a conceptual view showing the inside of the housing of the plasma sterilization module according to the third embodiment of the present invention.
17 is a perspective view showing a plasma sterilization module and a flow conversion device according to an embodiment of the present invention, and a cross-sectional view of the flow conversion device.
18 is a conceptual view showing an air conditioner having a plasma sterilization module according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the person having the scope of the invention, and the present invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

1 is a conceptual view showing the front of an air cleaner having a plasma sterilization module 100 according to an embodiment of the present invention. FIG. 2 is a conceptual view showing a side surface of the air cleaner shown in FIG. 1.

1 and 2, the air purifier 10 to which an embodiment of the present invention is applied includes a cylindrical body, a suction port 12 provided at a lower portion of the main body, and suctioned with air. It is provided with a discharge port 13 through which the air sucked into the suction port 12 is discharged, and a blower fan 11 provided inside the body to flow air from the suction port 12 side to the discharge port 13 side, and the sucked air. A plasma sterilization module 100 for sterilizing using plasma discharge may be provided.

In the air purifier 10, an intake port 12 through which air is sucked may be provided below the plasma sterilization module 100, and an outlet 13 through which air is discharged to the outside may be provided above the plasma sterilization module 100. have.

In addition, a blower fan 11 for flowing air to the upper side of the plasma sterilization module 100 may be disposed. In this case, the discharge port 13 may be formed above the blowing fan 11. That is, the blowing fan 11 may be disposed between the plasma sterilization module 100 and the discharge port 13.

The shape of the air cleaner 10 shown in FIGS. 1 and 2 is exemplary, and the present invention is not limited thereto.

On the other hand, a motor (not shown) for driving the blower fan 11, various circuit components, filters, and the like may be accommodated in the body of the air cleaner 10. The blower fan 11 may perform a function of sucking outside contaminated air and discharging the purified air back to the outside.

The blower fan 11 may be provided on the upper side of the plasma sterilization module 100 so that air flows from the lower side of the plasma sterilization module 100 to the upper side of the plasma sterilization module 100. Accordingly, air may flow in the order of the inlet 12, the plasma sterilization module 100, and the outlet 13. In addition, various filters may be disposed between the suction port 12 and the blowing fan 11.

The plasma sterilization module 100 is disposed inside the main body to sterilize and purify air sucked into the intake port 12. The plasma sterilization module 100 may be formed in the same shape as the inner periphery of the main body.

Hereinafter, the plasma sterilization module 100 according to an embodiment of the present invention will be described in detail with reference to the drawings.

Plasma sterilization module 100 according to an embodiment of the present invention is installed on a flow path through which air flows, and air that faces and enters the first surface 151 and the first surface 151 through which the air flows is introduced. The housing 150 having the discharged second surface 152 opened, the discharge electrode 110 installed in the housing 150, and the ground installed in the housing 150 and spaced apart from the discharge electrode 110 It includes an electrode 130.

The housing 150 may have an open first surface 151 and a circumferential surface 153 forming a second surface parallel to a flow path through which air flows. The housing 150 may be installed in an air purifier 10 to which the plasma sterilization module 100 is applied, an air conditioner, and the like, and on the surface forming the air flow path inside the main body of the air purifier 10 or the air conditioner It can be installed in contact. Therefore, the air entering the intake port 12 may pass through the plasma sterilization module 100 without fail and flow to the discharge port 13.

The discharge electrode 110 is applied with a high voltage to generate a plasma discharge toward the ground electrode 130 between the first surface 151 and the second surface 152. The discharge electrode 110 is applied with a high voltage to generate plasma discharge, the ground electrode 130 provides ground to the plasma sterilization module 100, and the plasma discharge generated from the discharge electrode 110 is the ground electrode 130 To be generated.

The discharge electrodes 110 are provided with a plurality of discharge electrode plates 111, a plurality of discharge electrodes 113 each of which is provided with a plurality of discharge electrodes 113, and a plurality of discharge electrode plates. It may include a discharge electrode support 116 for connecting the (111). The discharge electrode plate 111 and the discharge needle 113 may be integrally formed.

The plurality of discharge electrode plates 111, the plurality of discharge needles 113, and the discharge electrode support portion 116 may be made of a conductive material. The discharge needle 113 is provided on the discharge electrode plate 111, and the plurality of discharge electrode plates 111 are connected to the discharge electrode support unit 116, so that a voltage is applied to any portion of the discharge electrode 110. The discharge needles 113 may be applied with the same voltage.

The discharge electrode 110 may include a voltage applying unit 118 to which a high voltage is applied and connected to the plurality of discharge electrode plates 111. The voltage application unit 118 and the plurality of discharge electrode plates 111 may be connected by a discharge electrode support unit 116.

The plurality of discharge electrode plates 111 are spaced apart from each other, and the distances between the discharge electrode plates 111 adjacent to each other may be uniformly arranged. The ground electrode 130 may be disposed between the plurality of discharge electrode plates 111 spaced apart from each other.

The ground electrode 130 is connected to the opposite electrode plate 131 and the opposite electrode plate 131 disposed between the plurality of discharge electrode plates 111 and spaced apart from each other, and is grounded to be supported by the housing 150 An electrode support 136 may be included. The ground electrode 130 may include a plurality of opposing electrode plates 131.

The opposite electrode plate 131 may be disposed to face the discharge electrode plate 111. The counter electrode plates 131 may be disposed in the center between the plurality of discharge electrode plates 111 spaced apart from each other. The plurality of discharge electrode plates 111 and the plurality of counter electrode plates 131 may have the same distance between the discharge electrode plates 111 and the counter electrode plates 131 adjacent to each other.

The plurality of opposing electrode plates 131 may be connected to each other by a ground electrode support 136. The plurality of opposing electrode plates 131 and the ground electrode support 136 may be formed of a conductive material, and connected to each other to have the same potential. Therefore, even if a voltage is applied to any part of the ground electrode 130, it has the same potential, and even if ground is provided to any part of the ground electrode 130, the ground is applied to the plasma sterilization module 100 in the entire ground electrode 130. Can provide.

Meanwhile, the discharge electrode 110 and the ground electrode 130 are disposed such that air introduced into the first surface 151 is discharged to the second surface 152 through a region in which plasma discharge occurs. The plasma discharge may occur across air flowing into the first surface 151 and discharged to the second surface 152.

The discharge electrode 110 and the ground electrode 130 may be disposed parallel to the circumferential surface 153 of the housing 150. The plurality of discharge electrode plates 111 and the plurality of counter electrode plates 131 may be disposed parallel to the circumferential surface 153 of the housing 150.

The discharge electrode 110 and the ground electrode 130 may be arranged such that a region where the plasma discharge occurs crosses a direction in which the air flows. The discharge electrode 110 and the ground electrode 130 may be disposed in an orthogonal direction to a region in which the plasma discharge occurs and a direction in which the air flows. The region where the plasma discharge occurs may be orthogonal to the direction in which the air flows.

The width of the discharge electrode plate 111 and the counter electrode plate 131 may be defined in a direction perpendicular to the air flow direction, and the height may be defined in a direction parallel to the air flow direction. In this case, the discharge electrode plate 111 and the counter electrode plate 131 may be formed to have a width narrower than the height. Therefore, the discharge electrode 110 and the ground electrode 130 do not interfere with the air flow flowing into the first surface 151 of the housing 150 and discharged to the second surface 152 between the upstream and downstream of the air passage. It is possible to reduce the differential pressure of the compared to the prior art.

Meanwhile, the discharge needle 113 may protrude toward the opposite electrode plate 131, and the plurality of discharge needles 113 may have the same distance protruding from the discharge electrode plate 111. The plurality of discharge needles 113 may have the same size and shape.

Among the plurality of discharge needles 113, the plurality of discharge needles 113 provided on the discharge electrode plate 111 disposed between the plurality of opposite electrode plates 131 protrude toward the opposite electrode plate 131, alternately As a result, the opposite electrode plate 131 disposed inside the discharge electrode plate 111 and the opposite electrode plate 131 disposed outside the discharge electrode plate 111 may protrude.

That is, any one discharge needle 113 protrudes toward the opposite electrode plate 131 inside, and the two discharge needles 113 adjacent thereto protrude toward the opposite electrode plate 131 on the outside, and outwardly. The discharge needle 113 adjacent to the protruding discharge needle 113 may protrude inward. In other words, a plurality of discharge needles 113 protruding outward may be disposed between each of the plurality of discharge needles 113 protruding inward, and between a plurality of discharge needles 113 protruding outward. A plurality of discharge needles 113 protruding inward may be disposed.

Since the discharge electrode plate 111 and the counter electrode plate 131 are alternately arranged, the discharge electrode plate (at the outermost inner side of the housing 150, that is, the location closest to the circumferential surface 153 of the housing 150 ( 111) may be disposed, or the counter electrode plate 131 may be disposed. When the discharge electrode plate 111 is disposed on the outermost side inside the housing 150, the discharge needle 113 provided on the discharge electrode plate 111 disposed on the outermost side is provided with the inner opposite electrode plate 131. It can protrude toward.

Depending on the shape of the discharge electrode plate 111 and the counter electrode plate 131, the innermost discharge electrode plate 111 or the counter electrode plate 131 may be present. For example, when the plasma sterilization module 100 is provided with a discharge electrode plate 111 and a counter electrode plate 131 forming concentric circles, the discharge electrode plate 111 or the counter electrode plate 131 is disposed on the innermost side. It can be placed. The same is true not only for the circular shape but also for the polygonal shape. 3 to 8, the opposite electrode plate 131 is disposed on the innermost side, but unlike this, the discharge electrode plate 111 may be disposed on the innermost side.

When the discharge electrode plate 111 is disposed in the innermost position, that is, the location closest to the center of the housing 150, the discharge needles 113 provided in the discharge electrode plate 111 are connected to the outer ground electrode 130. It can protrude toward.

The discharge needle 113 may include a tip portion 114 with a sharp tip at the end toward the counter electrode plate 131. When a high voltage is applied to the discharge electrode 110, plasma discharge is generated from the tip portion 114 toward the opposite electrode plate 131.

The discharge needle 113 may have two tip portions 114 that are symmetrical to each other. When the discharge needle 113 is provided with two tip portions 114, it is easy to manufacture the discharge electrode 110 including the plurality of discharge needles 113, and waste of unnecessary materials can be reduced.

The discharge electrode plate 111 and the discharge needle 113 can be manufactured from one flat plate. When the central portion of the flat plate having a width greater than the height of the discharge needle 113 by twice the height of the discharge electrode plate 111 is cut so that the inverted trapezoidal shape is engaged, the discharge electrode plate in which the plurality of discharge needles 113 are installed ( 111) A pair may be manufactured, and the discharge needle 113 may be manufactured by bending the inverted trapezoidal shape toward the ground electrode 130. In this case, it can be economical by simplifying the manufacturing process and reducing waste of materials.

The discharge needle 113 may include two tip portions 114, and the two tip portions 114 may protrude in the same direction toward the ground electrode 130. In this case, the two tip portions 114 provided on any one of the discharge needles 113 protrude toward the inner ground electrode 130, and are connected to the discharge needles 113 adjacent to the one of the discharge needles 113. Two provided tip portions 114 may protrude toward the outer ground electrode 130.

Alternatively, one of the two tip portions 114 provided in either discharge needle 113 protrudes toward the inner ground electrode 130 and the other protrudes toward the outer ground electrode 130. Can be. In this case, the plurality of tip portions 114 may alternately protrude toward the inner ground electrode 130 and the outer ground electrode 130.

The plurality of discharge needles 113 may have the same size and shape. Since the distance between the discharge electrode plate 111 and the counter electrode plate 131 is constant, and the size and shape of the discharge needles 113 are the same, the discharge electrode 110 and the ground electrode 130 are separated from each other. The distance can be fixed. That is, the separation distance between the tip portion 114 of the plurality of discharge needles 113 and the opposite electrode plate 131 facing it may be constant. Plasma discharge may occur between the tip portion 114 of the discharge needle 113 and the opposite electrode plate 131 facing it.

Meanwhile, the intensity of the plasma discharge is determined according to the separation distance between the discharge electrode 110 and the ground electrode 130, the diameter of the tip portion 114, and the magnitude of the applied voltage. In the plasma sterilization module 100 according to an embodiment of the present invention, the distance between the discharge electrode 110 and the ground electrode 130, the diameter of the tip portion 114, and the magnitude of the applied voltage are areas where plasma discharge occurs Plasma discharges of uniform intensity may occur because they are the same in all.

The discharge electrode 110 and the ground electrode 130 may be formed of a material having excellent conductivity. The discharge electrode 110 may be formed of stainless steel.

Depending on the use of the plasma sterilization module 100, electrode wear may occur, particularly wear on the tip 114 of the discharge needle 113. Wear of the tip portion 114 makes the diameter of the tip thicker, and the distance between the discharge electrode and the ground electrode is changed, which may affect the plasma discharge intensity. Therefore, according to the use of the plasma sterilization module 100, the intensity of the plasma discharge may be non-uniform.

It is known that electrode wear can be prevented when a nickel-cobalt alloy is plated on the electrode. To prevent electrode wear, the discharge electrode 110 and the ground electrode 130 may be plated with a nickel-cobalt alloy on the outer surface. In particular, the discharge electrode 110 having the tip portion 114 may be plated with a nickel-cobalt alloy. The discharge electrode 110 may be plated with a nickel-cobalt alloy on at least a portion of the outer surface where plasma discharge occurs. That is, the discharge needle 113 may be plated with a nickel-cobalt alloy. The tip portion 114 of the discharge needle 113 may be plated with a nickel-cobalt alloy.

3 to 9, the plasma sterilization module 100 according to the first embodiment of the present invention is installed on a flow path through which air flows, and the first surface 151 through which the air flows and the agent A housing 150 having a second surface 152 facing the one surface 151 and discharging the incoming air, an discharge electrode 110 installed in the housing 150, and a housing 150 installed in the housing 150, And a ground electrode 130 spaced apart from the discharge electrode 110.

The housing 150 of the plasma sterilization module 100 according to the first embodiment of the present invention may be formed in a cylindrical shape in which the first surface 151 and the second surface 152 are opened. The housing 150 protrudes inward from the inner circumferential surface (153i, hereinafter also referred to as an inner circumferential surface), and an edge surface 155 located on one of the first surface 151 and the second surface 152, The hub ring 157 located in the center of any one of the first surface 151 and the second surface 152, and a radial spoke 158 connecting the edge surface 155 and the hub ring 157 It can contain. Hereinafter, the case where the edge surface 155 and the hub ring 157 are located on the second surface 152 will be described as an example.

The housing 150 may be formed with a guide groove 154 that enters outside from the inner circumferential surface 153i on a surface different from the surface on which the rim surface 155 is located among the first surface 151 and the second surface 152. . When the edge surface 155 is located on the second surface 152, the guide groove 154 may be formed to enter outside from the end of the housing 150 in the direction of the first surface 151 of the inner circumferential surface 153i. .

The housing 150 may have a circumferential surface 153 forming an open first surface 151 and a second surface 152 parallel to a flow path through which air flows. The outer circumferential surface of the housing 150 (153o, hereinafter also referred to as an outer circumferential surface) is to be installed in contact with the surface forming the air flow path inside the air purifier 10 or the air conditioner to which the plasma sterilization module 100 is applied. Can be.

The air purifier 10 or the air conditioner to which the plasma sterilization module 100 according to the first embodiment of the present invention is applied is provided with a suction port 12 at the bottom of the main body and a discharge port 13 at the top of the main body. In this case, the housing 150 may be installed such that the first surface 151 faces down and the second surface 152 faces up.

The discharge electrode 110 of the plasma sterilization module 100 according to the first embodiment of the present invention may include a plurality of ring-shaped discharge electrode plates 111 forming concentric circles around the central axis of the housing 150. The number of the discharge electrode plates 111 may vary depending on the size of the housing 150.

The discharge electrode 110 may include a voltage application unit 118 to which a high voltage is applied, and the voltage application unit 118 may be seated on the hub ring 157 of the housing 150. A high voltage may be applied to the voltage applying unit 118 through the hole formed in the center of the hub ring 157. In addition, the voltage applying unit 118 may be formed with a hole communicating with the hole formed in the center of the hub ring 157.

The discharge electrode 110 can be fixed to the housing 150 by fastening a bolt to a hole formed in the center of the hub ring 157 and a hole formed in the center of the voltage applying unit 118. A high voltage may be applied to the discharge electrode 110 by connecting a wire connected to a power source that applies a high voltage to the bolt. The means for applying a high voltage to the discharge electrode 110 is not limited to this, and various known means can be used.

The discharge electrode 110 may be located at a position closest to the circumferential surface 153 of the housing 150, or the ground electrode 130 may be located. 3 to 9, when the discharge electrode 110 is disposed at a position closest to the circumferential surface 153 of the housing 150, the discharge electrode plate located at the outermost side of the discharge electrode plate 111 ( 111) may be disposed to be seated on the edge surface 155 of the housing 150. The inner end of the edge surface 155 is formed to be stepped to have a seating groove 156 for guiding the arrangement position of the discharge electrode plate, and the discharge electrode plate 111 located at the outermost side contacts the seating groove 156 Can be supported. The discharge needles 113 protruding from the outermost discharge electrode plate 111 may protrude toward the inner ground electrode 130.

The discharge electrode 110 may include a discharge electrode support 116 connecting the plurality of discharge electrode plates 111. The discharge electrode support 116 may be seated on the spoke 158. The discharge electrode support unit 116 is installed to contact the voltage application unit 118 and the plurality of discharge electrode plates 111 so that a high voltage applied to the voltage application unit 118 can be applied to the discharge electrode plate 111. Connect. The voltage application unit 118 and the discharge electrode support unit 116 may be formed in a shape corresponding to the hub ring 157 and the spoke 158, respectively.

3 to 8, the discharge needle 113 may be provided with two tip portions 114 symmetrical to each other, and two tip portions 114 provided on one discharge needle 113 May protrude in the same direction toward the ground electrode 130. The two tip portions 114 of any one of the discharge needles 113 formed on the discharge electrode plate 111 disposed between the plurality of opposing electrode plates 131 have an inner ground electrode 130 ), the two tip portions 114 provided on the discharge needle 113 adjacent to any one of the discharge needles 113 may protrude toward the outer ground electrode 130.

The ground electrode 130 of the plasma sterilization module 100 according to the first embodiment of the present invention includes a counter electrode plate 131 disposed between the plurality of discharge electrode plates 111 and spaced apart from each other, and a plurality of counter electrodes A ground electrode support 136 connecting the plate 131 may be included. The opposite electrode plate 131 may form a concentric circle with the discharge electrode plate 111 around the central axis of the housing 150. The number of counter electrode plates 131 may vary depending on the number of discharge electrode plates 111. In the drawing showing the first embodiment of the present invention, the discharge electrode plate 111 and the counter electrode plate 131 are each provided three, but is not limited thereto.

The counter electrode plates 131 may be disposed in the center between the plurality of discharge electrode plates 111 spaced apart from each other. The distance spaced between the plurality of discharge needles 113 and the counter electrode plate 131 may be equal.

The ground electrode support 136 is formed radially outwardly from the innermost counter electrode plate 131, connects the plurality of counter electrode plates 131, and the opposite electrode plate 131 located at the outermost side. ) Protruding to the outside, the ground electrode 130 is installed to be supported on the housing 150. The ground electrode 130 may include a plurality of ground electrode supports 136. The outer end of the ground electrode support 136 may be seated in the guide groove 154. The ground electrode support 136 may be formed in a shape corresponding to the spoke 158 and the discharge electrode support 116.

The spoke 158, the discharge electrode support 116, and the ground electrode support 136 are each provided in three or more, the discharge electrode 110 and the ground electrode 130 can be stably seated on the housing 150. . In the drawing showing the first embodiment of the present invention, each of the six spokes 158, the discharge electrode support 116 and the ground electrode support 136 is illustrated, but is not limited thereto.

A ground connection part 138 may be formed at an outer end of at least one of the plurality of ground electrode support parts 136. The ground connection portion 138 may be formed to protrude in a vertical direction from the outer end of the ground electrode support portion 136, and a hole may be formed in the center. The ground connection 138 is connected to a ground electrode of a commercial power source, or connected to an air purifier 10 to which a plasma sterilization module 100 is applied or a control circuit board of an air conditioner to provide ground to the ground electrode 130. You can.

The discharge electrode 110 is supported on the rim surface 155 inside the housing 150 and is disposed on the second surface 152 side, and the ground electrode 130 is supported on the guide groove 154 and the first surface 151 ), the discharge electrode 110 and the ground electrode 130 may have a height lower than that of the housing 150 to be accommodated in the housing 150. The discharge electrode 110 and the ground electrode 130 are disposed on opposite sides of the housing 150, and have a height lower than that of the housing 150, but at least a portion of the discharge electrode 110 is disposed to face each other.

As shown in FIG. 9, the discharge electrode 110 and the ground electrode 130 may be disposed such that the discharge needle 113 and the counter electrode plate 131 face each other. The lower surface of the counter electrode plate 131 may be disposed at a lower position than the discharge needle 113, and the upper surface of the counter electrode plate 131 may be disposed at a higher position than the discharge needle 113.

In the plasma sterilization module 100 according to an embodiment of the present invention, the first surface 151 and the second surface 152 may be disposed perpendicular to a direction in which air flows. The discharge electrode 110 and the ground electrode 130 may be disposed in an orthogonal region in which plasma discharge occurs and a direction in which the air flows.

Therefore, the differential pressure between the upstream and downstream of the air passage is small, and the air passing through the plasma sterilization module 100 can be effectively sterilized.

The sterilization action using the plasma discharge of the plasma sterilization module 100 according to the present invention configured as described above is as follows.

FIG. 10(a) is a conceptual diagram showing the type of plasma discharge when a positive voltage is applied to the discharge electrode, FIG. 10(b) is a conceptual diagram showing the type of plasma discharge when the negative voltage is applied to the discharge electrode, and FIG. 11 passes through the plasma discharge region. It is a conceptual diagram showing the principle of sterilization of air.

The form of the plasma discharge (or corona discharge) is changed by a potential difference between the discharge electrode 110 and the counter electrode (or ground electrode). When the anode of the power source is connected to the discharge electrode 110 and the magnitude of the applied voltage is increased, it gradually changes to a2, a3, a4, and a5 in FIG. 10(a). In Fig. 10A, a2 represents glow discharge, a3 represents brush discharge, a4 represents streamer discharge, and a5 represents arc discharge.

When the negative electrode of the power source is connected to the discharge electrode 110 and the magnitude of the applied contact pressure is increased, it gradually changes to the form of b2 and b3 in FIG. 10(b), b2 represents glow discharge, and b3 represents arc discharge. When the negative electrode of the power source is connected to the discharge electrode, unlike the case where the positive electrode of the power source is connected, streamer discharge does not occur.

A positive voltage may be applied by connecting the positive electrode of the power source to the discharge electrode 110 of the plasma sterilization module 100 according to an embodiment of the present invention. The discharge electrode 110 may be applied with a positive high voltage to generate a streamer discharge toward the ground electrode 130. In the streamer discharge, when electric energy is further applied in the glow discharge, an avalanche occurs, which forms a wider discharge area than the glow discharge, and is advantageous for sterilization treatment.

The suspended microorganisms (m) in the air passing through the plasma sterilization module (100) pass through the discharge region between the discharge electrode (110) and the ground electrode (130), and charge is accumulated on the cell wall. The microorganism (m), the tension of the cell wall is collapsed by the Coulomb force of the charge, and the cell wall is torn, making metabolism impossible. The air is thereby sterilized.

In order to measure the sterilization performance of the plasma sterilization module 100 according to an embodiment of the present invention, air is flowed at a flow rate of 1 m/s to the plasma sterilization module 100 and before passing through the plasma sterilization module 100 After passing the microbial (m) concentration in the upstream region and the plasma sterilization module 100, the microbial (m) concentration in the downstream region was compared. The one-pass sterilization performance measured as described above was experimentally observed to be more than 60%. This is similar to the one-pass sterilization performance of UVC LEDs, which are commonly used for sterilization. UV rays are divided into UVA (315-400 nm), UVB (280-315 nm), and UVC (100-280 nm) depending on the wavelength, and the UVC LED refers to an organic light-emitting diode using UVC.

The sterilization performance is also related to the time it takes for air to pass through the plasma discharge region. When the flow path width of the region in which plasma discharge occurs is narrower than that of other flow paths, the flow of air becomes faster and it is difficult to accumulate sufficient charge in the microorganism.

Discharge electrode 110 and ground electrode 130 of the plasma sterilization module 100 according to an embodiment of the present invention is disposed in parallel with the circumferential surface 153 of the housing to minimize the change in the width of the air flow path, the air Charges are sufficiently accumulated in the suspended microorganisms, and sterilization performance may be improved.

In addition, in the case of the structure of the prior art sterilization module, the structure of the discharge area obstructs the flow of air so that a large portion of the air passing through the sterilization module does not pass through the plasma discharge area, and only a small proportion of air It passes through the discharge region, and the sterilization effect by the accumulation of electric charges is negligible. Therefore, the prior art is to perform a sterilization treatment by a diffusion phenomenon such as radicals, which is difficult to improve the sterilization performance.

In the plasma sterilization module 100 according to an embodiment of the present invention, the first surface 151 and the second surface 152 of the housing 150 are opened, and the discharge electrode 110 and the ground electrode 130 are housed. Arranged parallel to the circumferential surface 153 of the air, the air is directly passed through the plasma discharge area and sterilized, so that it is possible to perform sterilization by applying a lower voltage than the prior arts, while maintaining the above-described performance. The concentration of ozone can be lowered.

In general, the specification of the air purifier for ozone requires a concentration of 30 ppb or less, and when using the air purifier according to the prior art, ozone above the standard concentration may be generated. When the plasma sterilization module 100 according to an embodiment of the present invention is applied, ozone may be generated at a level of 1/6 or less of a standard concentration.

In addition, unlike the prior art, the plasma sterilization module 100 according to an embodiment of the present invention is a separate catalyst by sterilizing suspended microorganisms in the air by the Coulomb force of charge, as the air to be treated directly passes through the plasma discharge region. No means or dust filters are required. The catalyst means or the dust collecting filter is a factor that increases the pressure difference between the upper and lower air passages, and reduces the blowing performance. Thus, the plasma sterilization module 100 according to an embodiment of the present invention reduces the differential pressure compared to the prior art to improve the blowing performance, which has the effect of increasing the amount of air sterilized compared to the prior art.

The plasma sterilization module 100 according to an embodiment of the present invention may be applied to the air cleaner 10 or the air conditioner 30 having a heat exchanger. When applied to the air purifier 10, the blowing fan 11 allows air to flow into the body of the air purifier 10 through the intake 12, and the introduced air passes through the plasma sterilization module 100 to sterilize After being processed, it is discharged to the outside through the discharge port 13. When applied to the air conditioner 30 having a heat exchanger, air sterilized through the plasma sterilization module 100 as in the air cleaner 10 is exchanged with the heat exchanger and then discharged to the outside. Hereinafter, the case applied to the air purifier 10 will be described as an example.

The plasma sterilization module 100 is installed on a flow path through which air inside the air purifier 10 body flows, and the discharge electrode 110 is connected to an anode of a power source to generate plasma discharge toward the ground electrode 130. A plasma discharge can be generated by applying a high voltage of about 3.5 kV to the discharge electrode 110, and the plasma sterilization module 100 has a first surface 151 on the upstream side of the flow path through which air flows, and a second on the downstream side. The surface 152 is opened so that air passes directly through the plasma discharge region and is sterilized.

The first surface 151 and the second surface 152 of the housing 150 are opened, and the discharge electrode plate 111 and the opposite electrode plate 131 are disposed parallel to the circumferential surface 153 of the housing and discharged. The electrode plate 111 and the opposite electrode plate 131 are formed to have a width narrower than the height, so that the pressure difference can be minimized by not interfering with air flow. When the plasma sterilization module 100 of the present invention is applied, a differential pressure reduction of about 1/6 is generated compared to a hepa filter generally applied to the air purifier 10.

12 is a perspective view showing a plasma sterilization module according to a second embodiment of the present invention.

Plasma sterilization module 100 according to the second embodiment of the present invention includes a plurality of discharge modules (200, 300), a plurality of discharge modules (200, 300), respectively, the housing (250, 350), the discharge electrode ( 210, 310) and ground electrodes 230, 330.

The plurality of discharge modules 200 and 300 are disposed parallel to each other on a flow path through which air flows, and the second surface 252 of the discharge module 200 disposed on the upstream side and the discharge module 300 disposed on the downstream side ), the first surfaces 351 may be disposed to face each other. The plurality of discharge modules 200 and 300 may be installed spaced apart from each other in the air flow direction.

The plurality of discharge modules 200 and 300 may include the glow discharge module 200 and the streamer discharge module 300, and may also include two or more streamer discharge modules 300.

The streamer discharge module 300 generates a streamer discharge by applying a positive voltage to the discharge electrode 310. The ground electrode 330 is connected to a ground electrode of commercial power or is connected to a control circuit board such as an air cleaner 10 to provide ground to the plasma sterilization module 100, and the streamer discharge generated from the discharge electrode 310 It is to be generated toward the ground electrode 330.

The glow discharge module 200 generates a glow discharge by applying a negative voltage to the discharge electrode 210. The ground electrode 230 provides ground to the plasma sterilization module, and causes glow discharge generated from the discharge electrode 210 to be generated toward the ground electrode 230.

When a plurality of discharge modules includes two or more streamer discharge modules 300, air passes through the streamer discharge module 300 disposed on the upstream side, and airborne microorganisms (m) are sterilized and surviving microorganisms Silver passes through the streamer discharge module disposed on the downstream side, and is sterilized, so that it is possible to provide a higher sterilization performance than when a streamer discharge module 300 is provided.

When a plurality of discharge modules includes a glow discharge module 200 and a streamer discharge module 300, as shown in FIG. 12, the glow discharge module 200 is disposed on the upstream side, and the streamer discharge module 300 ) May be arranged downstream. The glow discharge module 200 and the streamer discharge module 300 may be disposed spaced apart from each other in the air flow direction.

Suspended microorganisms (m) in the air pass through the glow discharge module 200, and negative charges are accumulated in the cell wall, and microorganisms (m) in which negative charges are accumulated in the cell wall pass through the streamer discharge module 300, and the potential difference Is maximized and sterilized by Coulomb force. Accordingly, when a plurality of discharge modules includes the glow discharge module 200 and the streamer discharge module 300, it is possible to provide improved sterilization performance than when only two or more streamer discharge modules 300 are provided.

Other configurations and operations are the same or similar to the first embodiment of the present invention, so the same reference numerals are used and detailed descriptions thereof are omitted.

13 to 16 are views showing a plasma sterilization module according to a third embodiment of the present invention.

The plasma sterilization module 400 according to the third embodiment of the present invention includes a housing 450 having a polygonal cross-section of a circumferential surface 453 and a discharge electrode plate arranged parallel to any one of the circumferential surfaces 453 ( A discharge electrode 410 having 411 and a ground electrode 430 having a counter electrode plate 431 disposed in parallel with the discharge electrode plate 411 may be included.

As shown in FIG. 14, the housing 450 may have a rectangular cross section of the circumferential surface 453, and the discharge electrode plate 411 and the counter electrode plate 431 may have a circumferential surface 453 of the housing 450. It can be arranged parallel to a pair of faces facing each other.

As shown in FIG. 15, the discharge electrode 410 may include a plurality of discharge needles 413 having two tip portions 414 symmetrical to each other, and the discharge needles 413 have the shape of a parallel trapezoid. It is made of, it may be formed by bending the tip portion 414 to protrude toward the ground electrode 430. One of the two tip portions 414 may be bent toward the inner ground electrode 430, and the other may be bent toward the outer ground electrode 430.

A plurality of plasma sterilization modules 400 according to the third embodiment of the present invention are arranged in the air conditioner 30 and the like, and may be provided in a plurality in the direction perpendicular to the air flow path, and the circumferential surfaces 453 contact each other. The air is introduced into the air conditioner 30 and may be disposed to pass through the plasma sterilization module 400 without missing.

As shown in FIG. 16, the discharge electrodes 410 and 420 and the ground electrodes 430 and 440 may be arranged to form a plurality of layers in the air flow direction in the housing, and the discharge electrodes 410 disposed on one layer ) And the ground electrode 430 may be disposed spaced apart from the discharge electrode 420 and the ground electrode 440 disposed on different layers. A negative voltage is applied to the discharge electrode 410 disposed in the upstream layer to cause glow discharge, and a positive voltage is applied to the discharge electrode 420 disposed to the downstream layer to generate streamer discharge. Alternatively, a streamer discharge may occur by applying a positive voltage to both the discharge electrodes 410 and 420 disposed in the upper and lower layers.

Other configurations and operations are the same or similar to the first and second embodiments of the present invention, so the same reference numerals are used and detailed descriptions thereof are omitted.

Plasma sterilization module according to an embodiment of the present invention may be applied to the air purifier 10 as shown in FIGS. 1 and 2.

The air purifier 20 is a discharge guide device having a main fan 21 for generating air flow and a discharge grill having a concave shape downward while discharging air passing through the main fan 21 as shown in FIG. 17. (23), it is possible to control the flow direction of the air discharged from the discharge grill and may include a flow conversion device (25) provided to be movable. The flow diverting device 25 may include a flow diverting fan 27.

When the plasma sterilization module 100 according to an embodiment of the present invention is applied to the air purifier 20 having the flow switching device 25, the plasma sterilization module 100 may be provided inside the main body, or It can also be installed in the flow diverter (25).

When the plasma sterilization module 100 is provided in the flow diverter 25, the glow discharge module 200 is disposed upstream of the flow diverter fan 27, and the streamer discharge module 300 is the flow diverter fan 27 ).

The plasma sterilization module 400 according to an embodiment of the present invention may be applied to the air conditioner 30 having a heat exchanger as shown in FIG. 18.

The plasma sterilization module 400 may be disposed on the inlet side of the air conditioner, the heat exchanger may be disposed on the downstream side of the plasma sterilization module 400, and a blower fan may be disposed on the outlet side. Since the plasma sterilization module is disposed upstream of the heat exchanger, the sterilized air passes through the heat exchanger, thereby preventing bacterial growth of the heat exchanger.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical idea or prospect of the present invention.

10: Air purifier 11: Blowing fan
12: inlet 13: outlet
100: plasma sterilization module 110: discharge electrode
130: ground electrode 150: housing
151: first side 152: second side

Claims (20)

A housing installed on a flow path through which air flows, and a first surface through which the air flows in and a second surface opposite to the first surface and through which air flows in is discharged;
A discharge electrode installed in the housing; And
Included in; the ground electrode is installed in the housing, and spaced apart from the discharge electrode;
The discharge electrode is applied with a high voltage to generate a plasma discharge toward the ground electrode between the first surface and the second surface,
The discharge electrode and the ground electrode, the plasma sterilization module is arranged so that the air flowing into the first surface is discharged to the second surface through the region in which the plasma discharge occurs. According to claim 1,
The discharge electrode and the ground electrode, the plasma disinfection module is arranged so that the area where the plasma discharge occurs crossing the flow path of the air. According to claim 2,
The discharge electrode and the ground electrode, the plasma disinfection module is arranged orthogonal to the area in which the plasma discharge occurs and the direction in which the air flows. According to claim 1,
The housing is a plasma sterilization module, the peripheral surface forming the first surface and the second surface is formed parallel to the flow path of the air flow. The method of claim 4,
The discharge electrode and the ground electrode is a plasma sterilization module disposed parallel to the circumferential surface of the housing. According to claim 1,
The discharge electrode,
A plurality of discharge electrode plates spaced apart from each other; And
Includes; a plurality of discharge needles are provided on each of the plurality of discharge electrode plates, the plasma discharge is generated;
The ground electrode is a plasma sterilization module including a counter electrode plate disposed between the plurality of discharge electrode plates spaced apart from each other. The method of claim 6,
The discharge electrode plate and the counter electrode plate, the plasma sterilization module is disposed parallel to the peripheral surface of the housing forming the first surface and the second surface. The method of claim 6,
The discharge needle is a plasma sterilization module having two tip parts symmetrical to each other. The method of claim 6
The ground electrode is a plasma sterilization module comprising a plurality of counter electrode plates. The method of claim 9,
The discharge electrode includes a discharge electrode support connected to the plurality of discharge electrode plates and installed to be supported on the housing.
The ground electrode is connected to the counter electrode plate, a plasma sterilization module comprising a ground electrode support installed to be supported on the housing. The method of claim 9
The plurality of discharge electrode plates and the plurality of opposing electrode plates are spaced apart from each other, and spaced apart between the discharge electrode plates adjacent to each other and the opposing electrode plates. The method of claim 9,
The plurality of discharge needles positioned between the plurality of opposite electrode plates protrude toward the opposite electrode plate, and alternately opposite electrode plates disposed inside and outside the discharge electrode plate provided with the plurality of discharge needles alternately. Plasma sterilization modules projecting toward each other. The method of claim 12,
The discharge electrode plate disposed on the outermost side of the plurality of discharge electrode plates is disposed outside the counter electrode plate disposed on the outermost side of the plurality of counter electrode plates,
The plurality of discharge needles provided on the outermost discharge electrode plate, the plasma sterilization module protruding toward the outermost facing electrode plate. The method of claim 6,
The housing is formed in a cylindrical shape with the first and second surfaces open,
The discharge electrode is provided with a plurality of ring-shaped discharge electrode plates concentric circles around the central axis of the housing,
The ground electrode is a plasma sterilization module having a plurality of opposite electrode plates of a ring shape forming a concentric circle around the central axis of the housing. The method of claim 6,
The housing has a circumferential surface forming the opened first and second surfaces,
The circumferential surface of the housing has a rectangular cross section,
The discharge electrode plate and the counter electrode plate is a plasma sterilization module disposed parallel to a pair of opposing surfaces of the circumferential surface of the housing. According to claim 1,
The discharge electrode is formed of stainless steel, at least a portion of the outer surface of which is plated with a nickel-cobalt alloy (nickel-cobalt alloy) plasma sterilization module. According to claim 1,
The discharge electrode is a plasma sterilization module that generates a streamer discharge toward the ground electrode by applying a positive high voltage. An air cleaner having a plasma sterilization module according to any one of claims 1 to 17. The method of claim 18,
The air purifier,
A main fan generating air flow;
A discharge guide device for discharging air passing through the main fan and having a discharge grille having a concave shape downward; And
Includes; to control the flow direction of the air discharged from the discharge grill, is provided with a movable flow switch;
The plasma sterilization module is an air cleaner installed in the flow conversion device. An air conditioner having a plasma sterilization module according to any one of claims 1 to 17.

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