KR20200070567A - 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 having a first surface through which air is introduced and a second surface which faces the first surface and through which the introduced air is discharged, wherein the first and second surfaces are opened, and a cross section of an inner circumferential surface which forms the first and second surfaces is formed in a polygonal shape; a ground electrode installed in the housing; and a discharge electrode disposed in the housing and spaced apart from the ground electrode. The ground electrode includes a plurality of electrode units having a polygonal cross section. The discharge electrode includes a plurality of discharge bases formed in a polygonal shape, and discharge needles provided on the plurality of discharge bases, applied with a high voltage, and generating plasma discharge towards the electrode units. Accordingly, the plasma sterilization module can sterilize 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, and is installed in a shape that minimizes flow path resistance, thereby reducing a differential pressure between upstream and downstream.

Another object of the present invention is to provide a plasma sterilization module that uniformly arranges a separation distance between a discharge electrode and a ground electrode, to generate plasma discharge in all of the provided discharge needles, and to generate uniform plasma intensity. .

Another object of the present invention is to provide a plasma sterilization module that increases the separation distance between the discharge electrode and the ground electrode while maintaining the discharge strength by reducing the diameter of the tip of the discharge needle, and generates plasma discharge in a large area.

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, in the plasma sterilization module according to an embodiment of the present invention, the first surface through which the air flows in and the second surface opposite to the first surface and through which the introduced air is discharged are opened and opened. A housing having a polygonal cross-section of an inner circumferential surface forming the first surface and the second surface, a ground electrode installed in the housing, and a discharge electrode disposed in the housing and spaced apart from the ground electrode do.

The ground electrode includes a plurality of electrode parts having a polygonal cross-section, and the discharge electrode is provided with a plurality of discharge bases formed in a polygonal shape, and the plurality of discharge bases is applied with a high voltage to discharge plasma toward the electrode part. It includes a discharge needle that is generated.

The plurality of electrode parts may share a central axis with an inner circumferential surface of the housing, and may be disposed to be spaced apart from each other in the direction of the inner circumferential surface of the housing from the central axis.

The plurality of discharge bases may share a central axis with the inner circumferential surface of the housing and a plurality of electrode parts, and may be disposed to be spaced apart from each other in the direction of the inner circumferential surface of the housing from the central axis.

The plurality of discharge bases may be disposed one by one between the two electrode parts spaced apart from each other.

The plurality of discharge bases may be disposed in the center between the two electrode parts spaced apart from each other.

In the housing, the inner circumferential surface may have an inner angle of 90 degrees or more and 144 degrees or less.

In the housing, a cross section of the inner circumferential surface may be formed in a regular polygon.

The housing may include an outer ring having an outer circumferential surface, and a spoke protruding from a corner portion of the outer ring toward a central axis of the outer ring.

The housing may include a hub ring disposed closer to the central axis than the outer ring, and an inner ring disposed centrally between the outer ring and the hub ring, and the outer ring, the hub ring, and The inner ring may share a central axis, and the spoke may connect the outer ring, the inner ring, and the hub ring.

The inner ring may be provided in plural, the plurality of inner rings share a central axis, and may be disposed to be spaced apart from each other in the outer ring direction.

The spoke may connect an edge portion of the outer ring, an edge portion of the inner ring, and an edge portion of the hub ring.

The plurality of electrode parts may be disposed on an inner peripheral surface of the outer ring, an outer peripheral surface and an inner peripheral surface of the inner ring, and an outer peripheral surface and an inner peripheral surface of the hub ring.

The plurality of electrode parts may be arranged such that corner portions of the plurality of electrode parts are supported by the spokes, and the plurality of discharge bases may be arranged such that vertices of the plurality of discharge bases are positioned on the spokes.

The ground electrode may include a radial ground connection portion connecting the plurality of electrode portions, and the ground connection portion may be disposed to be supported by the spoke.

The spoke may be formed with an insertion groove extending along the longitudinal direction, and the ground connection portion may be inserted into the insertion groove.

The discharge electrode may include a base connection portion connecting the plurality of discharge bases, and the base connection portion may be disposed to be positioned on the spoke.

The plasma sterilization module may further include a discharge electrode housing accommodating the discharge electrode and coupled to the housing.

The discharge electrode housing may have a groove having the same shape as the discharge base, and the discharge needle may have a length longer than that of the discharge electrode housing.

The discharge needle may be manufactured separately from the discharge base and installed on the discharge base.

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

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 an area in which plasma discharge occurs, and as microorganisms in the air pass through the plasma discharge area, charges accumulate on the cell wall, and the 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. It also has the advantage of improving the sterilization performance and blowing performance by reducing the differential pressure of the upstream and downstream air paths.

Fourth, the first and second surfaces include a housing that is open, and the discharge electrode and the ground electrode share a central axis with the housing and are spaced apart from each other so that air does not bend while passing through an area where plasma discharge occurs. It also has the advantage of reducing the flow path resistance and reducing the differential pressure by flowing.

Fifth, the cross section of the inner circumferential surface of the housing and the cross section of the electrode portion facing the discharge needle are formed in a polygonal shape, and the discharge base provided with the discharge needle is also formed in a polygonal shape, so that the distance between the discharge electrode and the ground electrode is uniform. Plasma discharge can be generated in all the discharge needles provided therein, and there is also an advantage in that the intensity of the plasma discharge is uniformly generated.

Sixth, the discharge needle is manufactured separately from the discharge base, so that a discharge needle having a smaller diameter at the end of discharge than the conventional discharge unit can be economically provided, thereby maintaining the discharge intensity while separating the discharge electrode from the ground electrode. There is also an advantage that plasma discharge may occur in a wide area by increasing the distance.

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 is a perspective view of a plasma sterilization module according to an embodiment of the present invention.
4 is a plan view and a bottom view of the plasma sterilization module according to an embodiment of the present invention.
FIG. 5 is a view showing the ground electrode, the housing, and the ground electrode and the housing assembly shown in FIG. 3.
6 is a perspective view of the discharge electrode and some assemblies illustrated in FIG. 3.
7 is an enlarged view of area A shown in FIG. 4 and a conceptual view of the housing.
8 is a conceptual diagram illustrating air passing through a plasma discharge region generated in a part of a plasma sterilization module according to an embodiment of the present invention.
9 is a conceptual diagram showing the type of plasma discharge, (a) is a case where a positive voltage is applied to the discharge electrode, (b) is a conceptual diagram when a negative voltage is applied to the discharge electrode.
10 is a conceptual diagram showing the principle of sterilization of air passing through a plasma discharge region.

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 the air cleaner 10 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 10 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. The plasma sterilization module 100 may be installed on a flow path through which air flows.

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.

3 and 4 show a plasma sterilization module according to an embodiment of the present invention, Figure 5 (a) is a perspective view of the ground electrode, Figure 5 (b) is a plan view of the housing Figure 5 (c) is a first embodiment of the housing 5(d) is a perspective view of a ground electrode and a housing assembly, FIG. 6(a) is a perspective view of a discharge electrode, and FIG. 6(b) is a discharge electrode and a discharge electrode housing assembly It is a perspective view.

The plasma sterilization module 100 according to an embodiment of the present invention includes a first surface 151 through which the air flows, and a second surface 152 opposite to the first surface 151 and through which incoming air is discharged. It includes an opened housing 150, a ground electrode 130 installed in the housing 150, and a discharge electrode 110 installed in the housing 150 and spaced apart from the ground electrode 130.

Plasma sterilization module 100 according to an embodiment of the present invention may be formed in a spider web shape.

The housing 150 has an inner circumferential surface 153i forming an open first surface 151 and a second surface 152. The inner circumferential surface 153i has a polygonal cross section. That is, the inner circumferential surface 153i of the housing 150 is formed in the shape of a polygonal column in which the first surface 151 and the second surface 152 are opened.

The housing 150 may be installed on a flow path through which air flows, and an inner circumferential surface 153i forming an opened first surface 151 and a second surface 152 may be parallel to the flow path through which air flows. Can be formed. 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.

When the air purifier 10 or the air conditioner to which the plasma sterilization module 100 is applied is provided with the inlet 12 at the lower portion of the main body, and the outlet 13 at the upper portion of the main body, the housing 150 is the first The surface 151 may be installed toward the bottom, and the second surface 152 may be installed toward the top.

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 ground electrode 130 includes a plurality of electrode portions 131 formed in a polygonal cross section. Each of the plurality of electrode portions 131 has a polygonal cross section.

The ground electrode 130 is connected to the ground electrode of a commercial power source, or is connected to the control circuit board of the air purifier 10 or air conditioner to which the plasma sterilization module 100 is applied to provide ground to the ground electrode 130. Can be.

The discharge electrode 110 includes a discharge base 111 formed in a polygonal shape, and a plurality of discharge needles 113 provided in the discharge base 111. The discharge electrode 110 includes a plurality of discharge bases 111. Each of the plurality of discharge bases 111 is formed in a polygonal shape. Each discharge base 111 is provided with a plurality of discharge needles 113. The discharge needle 113 is applied with a high voltage and plasma discharge is generated toward the electrode unit 131.

The discharge electrode 110 and the ground electrode 130 may be made of a material having excellent conductivity, and the housing and the discharge electrode housing 160 described below may be made of a non-conductive material.

3 to 5, the housing 150 is disposed outside the outer ring 153 and outer ring 153 forming an outer edge, and a hub disposed closer to the central axis C than the outer ring 153 It may include a ring 155, the outer ring 153 and the inner ring 154 disposed between the spaced apart of the hub ring 155 and a radial spoke 157. The hub ring 155, the inner ring 154 and the outer ring 153 may be connected by spokes 157.

The outer ring 153 forms an outer periphery of the housing 150 and may include an inner circumferential surface 153i of the housing 150. Therefore, the inner circumferential surface 153i of the housing 150 means the inner circumferential surface 153i of the outer ring 153.

The hub ring 155, the inner ring 154 and the outer ring 153 share the central axis C, and the hub ring 155, the inner ring 154, and the outer ring from the central axis C outwardly (153). The inner ring 154 may be disposed in the center between the outer ring 153 and the spaced apart of the hub ring 155.

The housing 150 may include a plurality of inner rings 154, and the number of inner rings 154 may be determined according to the size of the plasma sterilization module 100. The electrode portion 131 may be disposed on the inner circumferential surface 154i and the outer circumferential surface 154o of the plurality of inner rings 154.

The plurality of inner rings 154 may have a similar shape and different shapes. The plurality of inner rings 154 share the central axis C, and may be disposed to be spaced apart from each other in the direction of the outer ring 153 from the central axis C. The plurality of inner rings 154 have a separation distance between inner rings 154 adjacent to each other, a separation distance between the inner ring 154 and the outer ring 153 disposed at the outermost, and an inner ring disposed at the innermost ( 154) and the hub ring 155 may be arranged in the same distance.

The plurality of inner rings 154 have different sizes, but the other items are the same or similar to each other. Hereinafter, the case where the inner ring 154 is one will be described as an example.

The inner ring 154 and the hub ring 155 may be formed in a ring shape having a polygonal cross section. Inner circumferential surface 153i of outer ring 153, inner circumferential surface 154i and outer circumferential surface 154o of inner ring 154, and inner circumferential surface 155i and outer circumferential surface of hub ring 155 ( 155o) may be formed in a cross-sectional shape similar to each other. That is, the inner circumferential surface 153i of the outer ring 153, the inner ring 154, and the cross sections of the hub ring 155 have different sizes and may be formed in the same shape.

For example, as shown in Figure 4, when viewed from the downstream or upstream side of the plasma sterilization module 100, the inner circumferential surface 153i of the outer ring 153, the inner ring 154, the hub The ring 155 may be formed in a regular octagon shape having different sizes. The shape of the regular octagon of the inner circumferential surface 153i of the outer ring, the inner ring 154 and the hub ring 155 is one example, and is not limited thereto.

On the other hand, in the polygonal column, the edge in the height direction is defined as a corner portion.

The spoke 157 may be formed to protrude toward the central axis C from the edge portion 153e of the outer ring. The spoke 157 may connect the edge portion 153e of the outer ring 153, the edge portion 154e of the inner ring 154, and the edge portion 155e of the hub ring 155. Therefore, compared to the case where the inner circumferential surface 153i of the outer ring 153, the inner ring 154, and the hub ring 155 are formed in a circular shape, it is easy to arrange the separation distance between each other.

Referring to FIG. 5, the spoke 157 is formed with an insertion groove 157h along the longitudinal direction, and the ground connection portion 135 of the ground electrode 130 to be described later may be inserted into the groove. The spoke 157 is an electrode at the end where the spoke 157 and the outer ring 153 meet, the end where the spoke 157 and the hub ring 155 meet, and where the spoke 157 and the inner ring 154 intersect. The insertion groove 157h may be extended in the same shape as the edge portion 131e of the portion 131, and the edge portion 131e of the electrode portion 131 may be inserted into the insertion groove 157h to form a spoke 157 ). The depth of the insertion groove 157h may be formed to be the same as the height of the ground electrode 130.

As will be described later, the inner peripheral surface 153i of the outer ring 153, the outer peripheral surface 154o and the inner peripheral surface 154i of the inner ring 154, and the outer peripheral surface 155o of the hub ring 155 And the electrode portion 131 of the ground electrode 130 is disposed on the inner circumferential surface 155i, and the ground connection portion 135 is inserted into the insertion groove 157h, between the discharge needle 113 and the electrode portion 131. Plasma discharge is generated, it is possible to prevent the discharge is generated between the discharge needle 113 and the ground connection (135). Therefore, the separation distance between the discharge needle 113 and the electrode portion 131 can be uniformly arranged.

The spoke 157 is formed with a stepped guide portion 157g to guide the installation position of the discharge electrode 110 to be described later. The discharge electrode 110 may be installed in contact with the housing 150 or may be installed in the discharge electrode housing 160 and the discharge electrode housing 160 may be coupled to the housing 150. The guide portion 157g is formed on the spoke 157, and may be formed on a portion connecting the inner ring 154 and the outer ring 153.

The guide portion 157g may be formed to have a step having a height equal to the height of the discharge base 111, and the discharge base 111 may be installed to contact the guide portion 157g. Alternatively, the guide portion 157g may be formed to have a step having a height equal to the height of the discharge electrode housing 160, the discharge electrode 110 is installed in the discharge electrode housing 160, and the discharge electrode housing 160 It can be installed to contact the guide portion.

The spoke 157 may have the insertion groove 157h formed on one side of the first side 151 and the second side 152, and the guide portion 157g formed on the other side. For example, as shown in FIGS. 3 and 4, the spoke 157 is formed with the guide portion 157g on the first surface 151 side of the housing 150, and the second of the housing 150. The insertion groove 157h may be formed on the surface 152 side. Alternatively, the spoke 157 is formed with the insertion groove 157h on the first surface 151 side of the housing 150, and the guide portion 157g is formed on the second surface 152 side of the housing. It might be.

3 to 5, the ground electrode 130 may include a plurality of electrode parts 131 and a ground connection part 135 connecting the plurality of electrode parts 131. Each of the plurality of electrode parts 131 is formed in a polygonal cross section, and the ground connection part 135 is formed in a radial shape to connect the corner parts 131e of the plurality of electrode parts 131. Meanwhile, in FIG. 4, the ground electrode 130 is a shaded configuration.

The electrode unit 131 may be installed in the housing 150. The plurality of electrode parts 131 include an inner circumferential surface 153i of the outer ring 153, an outer circumferential surface 154o and an inner circumferential surface 154i of the inner ring 154, and an outer circumferential surface of the hub ring 155. It may be respectively disposed on the (155o) and the inner peripheral surface (155i).

The plurality of electrode parts 131 may share the central axis C with each other. The plurality of electrode parts 131 may be disposed to be spaced apart from each other in the direction of the outer ring 153 (or the inner circumferential surface 153i of the housing) from the central axis C. The plurality of electrode parts 131 may share the central axis C with the outer ring 153, the inner ring 154, and the hub ring 155.

The plurality of electrode parts 131 may be formed in a similar shape having the same shape and different sizes from each other. The cross-sections of the plurality of electrode portions 131 include the inner circumferential surface 153i of the outer ring 153, the inner circumferential surface 154i of the inner ring 154, the outer circumferential surface 154o, and the hub ring 155. It may be shaped like a cross section of the inner circumferential surface 155i and the outer circumferential surface 155o.

The ground electrode 130 has a first electrode portion 131a disposed on an inner circumferential surface 153i of the outer ring 153, and an outer circumferential surface of the inner ring 154 facing the first electrode portion 131a ( 154o), a second electrode portion 131b, a third electrode portion 131c disposed on the inner circumferential surface 154i of the inner ring 154, and a third electrode portion 131c facing the hub A fourth electrode part 131d disposed on the outer circumferential surface 155o of the ring 155 and a fifth electrode part 131e disposed on the inner circumferential surface 155i of the hub ring 155 may be included. .

As described above, the housing 150 may be provided with a plurality of inner rings 154, in this case, the electrode portions are also provided on the outer circumferential surfaces 154o and the inner circumferential surfaces 154i of each of the plurality of inner rings 154. 131) may be disposed.

The plurality of electrode parts 131 may have the same separation distance between the electrode parts 131 disposed to face each other. The separation distance between the first electrode part 131a and the second electrode part 131b, the separation distance between the third electrode part 131c and the fourth electrode part 131d, and the fifth electrode part 131e facing each other The distances between the surfaces can be the same.

The ground connection 135 may be formed radially, and may be supported by spokes 157 of the housing 150. As described above, the ground connection portion 135 is inserted into the insertion groove 157h formed in the spoke 157, so that the ground electrode 130 can be installed in the housing 150.

The ground connection portion 135 may be formed by radially disposing a plurality of flat-shaped conductive materials. The plurality of plate-shaped members may connect edge portions of the first to fourth electrode portions, and at least one member of the plurality of plate-shaped members may connect edge portions of the first to fifth electrode portions.

Meanwhile, the hub ring 155 extends from the insertion groove 157h of the spoke 157 at a position where a member connecting the corner portions 132a to 132e of the first to fifth electrode portions 131a to 131e is disposed. A groove is formed so that the member can connect the fourth electrode portion 131d and the fifth electrode portion 131e.

The plurality of electrode parts 131 may be connected to each other by the ground connection part 135 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.

3, 4 and 6, the discharge electrode 110 includes a plurality of discharge bases 111 formed in a polygonal shape and a discharge needle 113 provided in the plurality of discharge bases 111. do. The plasma sterilization module 100 may include a discharge electrode housing 160 accommodating the discharge electrode 110, the discharge electrode 110 may be installed in the discharge electrode housing 160, and the discharge electrode housing 160 ) May be coupled to the housing 150. Alternatively, the discharge electrode 110 may be installed to contact the housing 150. Hereinafter, the case where the discharge electrode 110 is installed in the discharge electrode housing 160 will be described as an example.

The plurality of discharge bases 111 may be disposed between the outer ring 153 and the inner ring 154, and between the inner ring 154 and the hub ring 155. The plurality of discharge bases 111 may be disposed in the center between the outer ring 153 and the inner ring 154, and between the inner ring 154 and the hub ring 155. When a plurality of inner rings 154 are provided, the inner rings 154 may be spaced apart from each other, and the plurality of inner rings 154 may be spaced apart from each other.

The discharging base 111 specified the placement position in relation to the housing 150 is when viewed from the upstream side of the first surface 151 of the housing 150 or the downstream side of the second surface 152. It is to describe the placement position, and is not necessarily specific to be located on the same plane while being spaced apart. Hereinafter, the arrangement position of the discharge base 111 is also specified in relation to the ground electrode 130.

The plurality of discharge bases 111 may be disposed between the two electrode parts 131 spaced apart from each other. The plurality of discharge bases 111 may be disposed one by one between the two electrode parts 131 spaced apart from each other. The plurality of discharge bases 111 may be disposed in the center between the two electrode parts 131 spaced apart from each other.

The plurality of discharge bases 111 are disposed between the first electrode portion 131a and the second electrode portion 131b, and between the third electrode portion 131c and the fourth electrode portion 131d. Can be. The plurality of discharge bases 111 are spaced apart between the first electrode portion 131a and the second electrode portion 131b, and spaced apart between the third electrode portion 131c and the fourth electrode portion 131d. It can be placed in the middle of.

On the other hand, as described later, the discharge needle 113 is provided on the discharge base 111, may be further provided on the central axis (C), and each discharge needle 113 provided on the discharge electrode 110, respectively The distance between the electrode portions 131 facing the discharge needle 113 may be the same.

The plurality of discharge bases 111 share the central axis C with each other. The plurality of discharge bases 111 may be arranged to be spaced apart from each other in the direction of the outer ring 153 (or the inner circumferential surface 153i of the housing) from the central axis C. The plurality of discharge bases 111 may share the central axis C with the plurality of electrode portions 131, the outer ring 153, the inner ring 154, and the hub ring 155. Therefore, the central axis C may be referred to as the central axis C of the plasma sterilization module 100.

The plurality of discharge bases 111 may be formed in a shape similar to each other and different sizes. The plurality of discharge bases 111 includes a plurality of electrode portions 131, an inner peripheral surface 153i of the outer ring 153, an inner peripheral surface 154i and an outer peripheral surface 154o of the inner ring 154, and The hub ring 155 may have a shape similar to a cross section of the inner circumferential surface 155i and the outer circumferential surface 155o.

The discharge base 111 is arranged such that the vertex is on the spoke 157. When the discharge electrode 110 is installed to contact the housing 150, the discharge base 111 is disposed so that the vertex contacts the spoke 157. When the discharge electrode 110 is installed in the discharge electrode housing 160, when viewed from above, the discharge base 111 is disposed so that the vertex overlaps with the spoke 157.

When the high voltage is applied to the discharge electrode 110, the discharge needle 113 is plasma discharged toward the electrode portion 131 of the ground electrode 130. The discharge needle 113 may be arranged parallel to the air flow direction.

Discharge needle 113 is provided on the discharge base 111, the discharge base 111 is disposed in the center between the spaced apart of the plurality of electrode parts 131, the separation of the two electrode parts 131 facing each other Discharge needle 113 is arranged in the center. When a high voltage is applied to the discharge electrode 110, the discharge needle 113 generates plasma discharge in both directions toward the two electrode parts 131 facing each other.

On the other hand, depending on the use of the plasma sterilization module 100, electrode wear may occur, and wear may particularly occur at the end of the discharge needle 113. The wear of the discharge needle 113 makes the diameter of the tip thicker and can affect the plasma discharge strength. 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. In order to prevent electrode wear, the discharge needle 113 may be formed of a nickel-cobalt alloy, or may be formed of stainless steel and plated with a nickel-cobalt alloy.

The discharge needle 113 is manufactured separately from the discharge base 111 and may be installed on the discharge base 111. The discharge base 111 may be made of a metal paste. When the discharge needle 113 and the discharge base 111 are integrally manufactured using a mold, there is a limit in reducing the diameter of the tip of the discharge needle 113, and the diameter of the tip of the discharge needle 113 is 100 μm or less. There are significant difficulties in making it. On the other hand, when the discharge needle 113 is separately manufactured, it is easy to manufacture the discharge needle 113 so that the diameter of the tip thereof is about 10 μm or less.

On the other hand, the discharge intensity is greater in the magnitude of the applied voltage, the smaller the diameter of the tip of the discharge needle 113, the larger the distance between the discharge needle 113 and the counter electrode is closer. Therefore, the discharge needle 113 can be manufactured separately from the discharge base 111 to reduce the diameter of the end, and the separation distance between the discharge needle and the electrode portion 131 can be made larger than before, thereby increasing the discharge area. I can do it.

The discharge electrode 110 may include a fastening ring 118 and a base connection portion 116. The discharge electrode 110 may be disposed such that the base connection portion 116 is positioned on the spoke 157. The fastening ring 118 may be disposed on the hub ring 155. The plurality of discharge bases 111, the base connection portion 116, and the fastening ring 118 may be integrally formed.

The above-described base connection 116 is located on the spoke 157, as well as when the base connection 116 is positioned to contact the spoke 157, the upstream side of the first side 151 of the housing 150 Or, it may include a case where the second surface 152 is arranged to overlap when viewed from the downstream side. It is also like that the fastening ring 118 is disposed on the hub ring.

The fastening ring 118 may share the central axis C with the discharge base 111, and may be disposed closer to the central axis C than the discharge base 111. The fastening ring 118 may be formed in a polygonal shape resembling the discharge base 111.

The base connection unit 116 may connect a plurality of discharge bases 111. The base connecting portion 116 is formed extending from the fastening ring 118 toward the outermost discharge base 111 to connect the plurality of discharge bases 111 and the fastening ring 118, and may be formed radially. . The base connection unit 116 may connect vertices of the plurality of discharge bases 111. The base connection part 116 may connect the vertices of the fastening ring 118 and the vertices of the plurality of discharge bases 111. A portion of the radial base connection 116 may be formed past the central axis C.

On the other hand, the discharge needle 113 is not only provided on the discharge base 111, but also installed on the base connecting portion 116c passing through the central axis C, may be provided on the central axis C. The discharge needle 113 provided on the central axis C may generate plasma discharge toward the electrode portion 131 disposed on the inner circumferential surface 155i of the hub ring 155.

The discharge needle 113, the discharge base 111, the base connection portion 116, and the fastening ring 118 are all connected, so that a voltage may be applied to any part, the plurality of discharge needles 113 may be applied with the same voltage. have. The discharge electrode 110 may include a voltage applying unit (not shown) to which a high voltage is applied and connected to the plurality of discharge bases 111 or the base connection unit 116.

The discharge electrode housing 160 accommodates the discharge electrode 110 and may be coupled to the housing 150. The discharge electrode housing 160 is formed with grooves having the same shape as the plurality of discharge bases 111 so that the discharge base 111 can be inserted. The discharge electrode housing 160 is formed with a plurality of discharge bases 111, base connections 116, and grooves of the same shape as the combinations of the fastening rings 118 so that the combinations can be inserted into the grooves. The discharge base 111 is inserted into the discharge electrode housing 160 to prevent contact with the ground electrode 130.

The length of the discharge needle 113 is formed to be longer than the depth of the groove of the discharge electrode housing 160. Accordingly, the discharge needle 113 is projected from the discharge electrode housing 160 when viewed from the side, and plasma discharge may be generated to face the electrode portion 131.

The discharge electrode housing 160 is disposed in contact with the guide portion 157g of the spoke 157 described above, so that the discharge electrode housing 160 may be combined with the housing 150. The discharge electrode housing 160 may be coupled to the housing 150 by engaging the edge portion 163e of the outer circumferential surface 163 with the guide portion 157g of the spokes 157 and 157.

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 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 outer ring 153, the inner ring 154, and the hub ring 155 may be arranged in parallel with the air flow direction, and the plurality of electrode portions 131 may have an inner circumferential surface 153i of the outer ring 153, The inner peripheral surface 154i and outer peripheral surface 154o of the inner ring 154 and the inner peripheral surface 155i and outer peripheral surface 155o of the hub ring 155 are disposed, and the discharge needle 113 is air It can be arranged parallel to the flow direction.

The width of the housing 150 may be defined in a direction perpendicular to the air flow direction, and the height may be defined in a direction perpendicular to the air flow direction. In this case, the outer ring 153, the inner ring 154, the hub ring 155 and the spoke 157 may be formed to have a width narrower than the height.

Accordingly, the plasma sterilization module 100 according to an embodiment of the present invention reduces the flow resistance of air flowing into the first surface 151 of the housing and discharged to the second surface 152, and the upstream and downstream air passages The differential pressure between can be reduced compared to the prior art.

On the other hand, the intensity of the plasma discharge is determined depending on the distance between the discharge electrode 110 and the ground electrode 130, the diameter of the tip of the discharge needle 113, 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 of the discharge needle 113, and the magnitude of the applied voltage generate plasma discharge. Plasma discharges of uniform intensity may occur because they are the same in all regions.

7 shows the outer ring 153 of the housing 150 (or the inner circumferential surface 153i of the housing) and the inner angle θ of the electrode 131 and the outer ring according to the inner angle θ. (153) and the shape of the electrode portion (131).

Referring to FIG. 7, the angle θ of the inner angle of the inner circumferential surface 153i of the housing 150, that is, the angle θ of the inner angle of the outer ring 153 may be formed to be 90 degrees or more and 144 degrees or less. have. The outer circumferential surface 154o and the inner circumferential surface 154i of the inner ring 154, the angles of the inner circumferential surfaces of the outer circumferential surface 155o and the inner circumferential surface 155i of the hub ring 155 are It may be the same as the angle (θ) of the cabinet. In addition, the angle of the inner angle of the plurality of electrode portions 131 and the angle of the inner angle of the discharge base 111 may be the same as the angle θ of the inner angle of the outer ring 153.

The cross section of the inner circumferential surface 153i of the housing 150, that is, the cross section of the inner circumferential surface 153i of the outer ring 153 may be formed in a regular polygon. Therefore, the angles θ of all the cabinets of the outer ring 153 may be the same. In addition, cross sections of the outer circumferential surface 154o and the inner circumferential surface 154i of the inner ring 154 and the outer circumferential surface 155o and the inner circumferential surface 155i of the hub ring 155 are of the outer ring 153. The inner circumferential surface 153i may have a regular polygonal shape resembling a cross section. In addition, the cross-section of the plurality of electrode portions 131 and the plurality of discharge bases 111 may be formed in a regular polygon shape similar to the cross-section of the inner circumferential surface 153i of the outer ring 153.

The inner circumferential surface 153i, the inner ring 154, the hub ring 155 of the outer ring 153 formed of a regular polygonal or regular polygonal columnar shape, the plurality of electrode portions 131 and the discharge base 111 have an angle of inner angle It can be formed to 90 degrees or more and 144 degrees or less, which means that the regular polygon is a square to a regular hexagon.

When the inner circumferential surface 153i of the outer ring 153 is formed of an equilateral triangular column, the area of the opened area of the first surface 151 or the second surface 152 is about 0.41 or less of the cross-sectional area of the housing 150 Has a ratio of When the inner circumferential surface 153i of the outer ring 153 is formed of a square column, the width of the opened projection of the first surface 151 or the second surface 152 is about 0.64 or less of the cross-sectional area of the housing 150 Has a ratio of Therefore, when the cross section of the inner circumferential surface 153i of the outer ring 153 is an equilateral triangle, at least half of the air passing through the plasma sterilization module 100 experiences flow resistance, and the upstream of the plasma sterilization module 100 and The downstream differential pressure is large.

As shown in FIG. 7( c), when the angle θ of the inner angle of the outer ring 153 is 144 degrees, the inner circumferential surface 153i of the outer ring 153 is in the shape of a regular hexagonal column, and the housing ( 150) Since the ratio of the open area to the total cross-sectional area is large, the differential pressure may be small. However, when the angle θ of the inner cabinet exceeds 144 degrees, that is, a regular polygon exceeding a regular hexagon, the outer ring 153, the inner ring 154, the hub ring 155, and a plurality of electrode portions 131 ), the manufacturing process of the discharge base 111 is complicated, and the effect of reducing the differential pressure is not large.

Meanwhile, as illustrated in FIGS. 1 to 5, the outer circumferential surface 153o of the housing 150 of the plasma sterilization module 100 according to an embodiment of the present invention may be formed in a circular column shape, The inner circumferential surface 153i may be formed in a regular polygonal column shape, but is not limited thereto. The shape of the outer circumferential surface 153o of the housing 150 may be changed according to the circumferential surface of the internal flow path such as the air purifier 10 to which the plasma sterilization module 100 is applied. For example, the outer circumferential surface 153o of the housing 150 may have an elliptical columnar shape, and the inner circumferential surface 153i may have a shape of a symmetrical polygonal column. Alternatively, both the outer circumferential surface 153o and the inner circumferential surface 153i of the housing 150 may have a polygonal shape.

8 shows air passing through the plasma sterilization module 100 according to an embodiment of the present invention. Referring to FIG. 8, a plurality of electrode portions 131 may be disposed to face each other, and a discharge needle 113 may be disposed in the center between spaced apart portions of the plurality of electrode portions 131. The plurality of electrode parts 131 and the discharge needle 113 may be arranged in parallel with the air flow direction.

When a high voltage is applied to the discharge electrode 110, the discharge needle 113 generates plasma discharge in both directions toward the electrode portions 131 disposed to face each other. Plasma discharge may be generated toward the electrode portion 131 from the end of the discharge needle 113. Air is introduced into the opened first surface 151 of the housing 150, passes through the plasma discharge region, and is discharged to the second surface 152.

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.

9(a) is a conceptual diagram illustrating the type of plasma discharge when a positive voltage is applied to the discharge electrode 110, and FIG. 9(b) is a conceptual diagram showing the type of plasma discharge when a negative voltage is applied to the discharge electrode 110, and FIG. Is a conceptual diagram showing the principle of sterilization of air passing through a plasma discharge region.

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, a5 in FIG. 9(a). 9(a), 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 110, 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.

Alternatively, a negative voltage may be applied to the discharge electrode 110 by connecting the negative electrode of the power source. The discharge electrode 110 may be applied with a negative high voltage to generate glow discharge toward the ground electrode 130. It is known that the glow discharge generated by applying a negative high voltage has a lower sterilization performance compared to a streamer discharge, but less ozone generation.

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 in this way was experimentally observed to be similar to the one-pass sterilization performance of UVC LEDs, which are commonly used for sterilization treatment.

Meanwhile, ultraviolet rays are divided into UVA (315 to 400 nm), UVB (280 to 315 nm), and UVC (100 to 280 nm) according to 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.

The ground electrode 130 of the plasma sterilization module 100 according to an embodiment of the present invention is disposed in parallel with the inner circumferential surface 153i of the housing 150 to minimize the change in the width of the air flow path, thereby floating in the air. Charges are sufficiently accumulated in 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 is present. It passes through the discharge region, and the sterilizing 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 in parallel with the inner circumferential surface 153i of the air, since the air is directly sterilized through the plasma discharge region, sterilization can be performed by applying a lower voltage than the prior arts, while maintaining the above-described performance. The concentration of ozone generated 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 below a standard concentration may be generated.

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 an air purifier 10 or an air conditioner 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 an air conditioner having a heat exchanger, air sterilized by passing 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. Plasma discharge can be generated by applying a high voltage 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 surface 152 on the downstream side. This opening allows air to pass directly through the plasma discharge region and sterilize it.

The first surface 151 and the second surface 152 of the housing 150 are opened, and the plurality of electrode portions 131 are disposed parallel to the inner circumferential surface 153i of the housing, and the discharge electrode housing 160 The inner ring 154, the hub ring 155, and the spokes 157 are formed to have a width narrower than the height, thereby minimizing the differential pressure by not interfering with the air flow. When the plasma sterilization module 100 of the present invention is applied, a differential pressure reduction of about 1/10 level occurs compared to a hepa filter generally applied to the air purifier 10.

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
111: discharge base 113: discharge needle
116: base connection 118: fastening ring
130: ground electrode 131: electrode portion
135: ground connection 150: housing
151: first side 152: second side
153: outer ring 154: inner ring
155: hub ring 157: spoke (157)
160: discharge electrode housing

Claims (20)

A first surface through which air flows and a second surface opposite to the first surface and through which the incoming air is discharged are opened, and cross-sections of the inner peripheral surface forming the opened first surface and the second surface are formed in a polygonal shape housing;
A ground electrode installed in the housing; And
Discharge electrode disposed in the housing, spaced apart from the ground electrode; includes,
The ground electrode includes a plurality of electrode parts having a polygonal cross section.
The discharge electrode,
A plurality of discharge bases formed in a polygonal shape,
The plasma sterilization module is provided on the plurality of discharge bases, and includes a discharge needle that generates a plasma discharge toward the electrode portion by applying a high voltage. According to claim 1,
The plurality of electrode parts, a plasma sterilization module that is shared with the inner circumferential surface of the housing and the central axis, and is spaced from each other in the direction of the inner circumferential surface of the housing from the central axis. According to claim 2,
The plurality of discharge bases, a plasma sterilization module that is shared with the inner circumferential surface of the housing and the plurality of electrode parts and a central axis, and is spaced from each other in the direction of the inner circumferential surface of the housing from the central axis. The method of claim 3,
The plurality of discharge bases are plasma sterilization modules are disposed one by one between the two electrode parts spaced apart from each other. The method of claim 4,
Each of the plurality of discharge bases is a plasma sterilization module disposed in the center between the two electrode parts spaced apart from each other. According to claim 1,
The housing, the inner surface of the inner surface of the plasma sterilization module is formed to 90 degrees or more, 144 degrees or less. The method of claim 6,
The housing, the plasma sterilization module is formed in a regular polygonal cross-section of the inner circumferential surface. According to claim 1,
The housing,
An outer ring forming an outer edge and having an inner circumferential surface,
Plasma sterilization module comprising a spoke protruding from the edge portion of the outer ring toward the central axis of the outer ring. The method of claim 8
The housing,
Hub ring disposed closer to the central axis than the outer ring,
It includes an inner ring disposed in the center between the outer ring and the spaced apart of the hub ring,
The outer ring, the hub ring and the inner ring share a central axis,
The spoke is a plasma sterilization module connecting the outer ring, the inner ring and the hub ring. The method of claim 9,
The spokes, plasma sterilization module connecting the corner portion of the outer ring, the corner portion of the inner ring and the corner portion of the hub ring. The method of claim 9
The plurality of electrode parts,
Plasma sterilization module disposed on the inner peripheral surface of the outer ring, the outer peripheral surface and the inner peripheral surface of the inner ring, the outer peripheral surface and the inner peripheral surface of the hub ring. The method of claim 8,
The plurality of electrode portions, the edge portion is arranged to be supported by the spokes,
The plurality of discharge bases, plasma sterilization module is arranged so that the vertices are located on the spokes. The method of claim 8,
The ground electrode includes a radial ground connection portion connecting the plurality of electrode portions,
The ground connection portion is a plasma sterilization module disposed to be supported on the spokes. The method of claim 13,
The spoke is formed with an insertion groove extending along the longitudinal direction,
The ground connection part is a plasma sterilization module inserted into the insertion groove. The method of claim 8,
The discharge electrode,
It includes a base connection for connecting the plurality of discharge base,
Plasma sterilization module is disposed such that the base connection is located on the spoke. According to claim 1,
Plasma sterilization module for receiving the discharge electrode, further comprising a discharge electrode housing coupled to the housing. The method of claim 16,
The discharge electrode housing has a groove having the same shape as the discharge base,
The discharge needle, the plasma sterilization module is formed longer than the groove of the discharge electrode housing. According to claim 1,
The discharge needle is manufactured separately from the discharge base, and the plasma sterilization module is installed on the discharge base. An air cleaner having a plasma sterilization module according to any one of claims 1 to 18. An air conditioner having a plasma sterilization module according to any one of claims 1 to 18.

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