KR20190105697A - Plasma sterilizing apparatus for drain - Google Patents

Abstract

A plasma sterilizing apparatus for a drain according to an aspect of the present invention includes a main body; a grounding portion disposed on one surface of the main body and in contact with the drain to ground the same; and a high voltage generating portion connected to one surface of the main body to generate plasma discharge with the drain. The plasma sterilizing apparatus for a drain thus can be miniaturized and the usability thereof can be improved.

Description

Plasma sterilizing apparatus for drain

The present invention relates to a plasma sterilization apparatus, and more particularly, to a plasma sterilization apparatus for drains for sterilization and deodorization using plasma discharge.

A sink is provided with a drain hole for flowing used water, and is capable of washing a human body or an object while flowing water, and includes a kitchen, laundry, and toilet. Sink is important for hygiene management.

Since food waste may cause bacteria to grow and odor, food hygiene, especially in cooking and dish washing, is very important for hygiene management.

Therefore, various methods of performing sterilization and deodorization treatment in drains have been proposed.

For example, the prior art 1 (Korean Patent Laid-Open Publication No. 10-2006-0017098, publication date February 15, 2006) uses a sterilization deodorizing port having activated carbon stored therein attached to a sink.

In addition, the prior art 1 the body is made of a material of bronze and the lid is made of a material of silver, the sterilization and deodorization by copper and silver.

Prior art 2 (Korean Patent Publication No. 10-2010-0132902, Publication Date December 20, 2010) is connected to one side of the bucket constituting the sink as a sink drain container sterilization device to drain the washing water to the outside Sterilize by injecting ozone into urea.

On the other hand, the prior art 1 attaches the sterilization deodorizing port to the outside of the sink, it may interfere with the user's operation, there may be trouble when using. In addition, the sterilization effect may be inferior to the direct sterilization by the copper and silver of the body and the lid being ionized and soaked in water.

In addition, since the prior art 2 is used by connecting to one side of the bucket, it is difficult to install and compact design, and the pressure difference may occur in the drainage structure.

In addition, since ozone is directly injected and used, much care must be taken to manage ozone that may be harmful to human body.

Therefore, a method for improving sterilization and deodorization performance is required.

It is an object of the present invention to provide a plasma sterilization apparatus for drainage with improved sterilization and deodorization performance.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma sterilization apparatus for drainage that is easy to install and use.

It is an object of the present invention to provide a plasma sterilization apparatus for drainage that is safer and more hygienic because it is not in contact with the human body.

Plasma sterilization apparatus for drains according to an aspect of the present invention, to achieve the above or another object, is disposed on one surface of the main body, the ground portion for contacting and grounding the drain port, and connected to one surface of the main body, And a high voltage generator for generating a plasma discharge, it is possible to miniaturize and improve the ease of use.

Plasma sterilization apparatus for drain in accordance with an aspect of the present invention, to achieve the above or another object, the ground portion filtering net having a mesh (mesh) structure of the metal, the ground connection portion for grounding the ground portion strainer, ground portion strainer and plasma It may include a high voltage portion for generating a discharge, a high voltage connection for applying a voltage to the high voltage portion.

According to at least one of the embodiments of the present invention, it is possible to provide a plasma sterilization apparatus for drainage is improved sterilization and deodorization performance.

In addition, according to at least one of the embodiments of the present invention, it is possible to provide a plasma sterilization apparatus for drainage is easy to install and use.

In addition, according to at least one of the embodiments of the present invention, there is no contact with the human body can provide a more safe and hygienic plasma sterilization apparatus for drains.

On the other hand, various other effects will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention to be described later.

1 is a conceptual diagram illustrating a front surface of a plasma sterilizing apparatus for drains according to an embodiment of the present invention.
2 is a cross-sectional view of the plasma sterilization apparatus for drains according to an embodiment of the present invention.
3 and 4 are views referred to in the description of the filling of the plasma sterilizing apparatus for drains according to an embodiment of the present invention.
5 and 6 are views referred to in the description of the plasma discharge of the plasma sterilizing apparatus for drains according to an embodiment of the present invention.
7 to 10 is a view referred to in the description of the spacing control of the plasma sterilizing apparatus for drains according to an embodiment of the present invention.
11 is a view referred to for describing the operation method of the plasma sterilization apparatus for drains according to an embodiment of the present invention.
12 is a conceptual diagram illustrating a front surface of a plasma sterilizing apparatus for drains according to an embodiment of the present invention.
Figure 13 is an exploded view of the plasma sterilization apparatus for drains according to an embodiment of the present invention.
14 to 16 are views referred to in the description of the plasma discharge of the plasma sterilizing apparatus for drains according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention; However, the present invention is not limited to these embodiments and may be modified in various forms.

In the drawings, illustrations of parts not related to the description are omitted in order to clearly and briefly describe the present invention, and the same reference numerals are used for the same or extremely similar parts throughout the specification.

On the other hand, the suffixes "module" and "unit" for the components used in the following description are merely given in consideration of ease of preparation of the present specification, and do not give particular meanings or roles by themselves. Therefore, the "module" and "unit" may be used interchangeably.

Further, in this specification, terms such as first and second may be used to describe various elements, but such elements are not limited by these terms. These terms are only used to distinguish one element from another.

1 is a conceptual diagram illustrating a front surface of a plasma sterilization apparatus for drains according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the plasma sterilization apparatus for drains according to an embodiment of the present invention.

1 and 2, the plasma sterilizing apparatus 10 for drains according to an embodiment of the present invention includes a main body 100 accommodating various components such as a battery (not shown) and a processor (not shown) therein. A ground part 120 disposed on one surface of the main body 100 to contact and ground the drain hole, and a high voltage generator 110 connected to one surface of the main body 100 to generate a plasma discharge with the drain hole. ) May be included.

The plasma sterilization apparatus 10 for drains may be inserted and used at the inlet side of the drains. For example, the high voltage generation unit 110 may be inserted into the drainage inner space in the drain opening inlet direction, and the grounding part 120 may contact the drain opening.

According to an embodiment, an operation button such as an on / off button may be provided on an upper surface of the main body 100.

The high voltage generating unit 110 and the grounding unit 120 may be connected to a bottom surface of the main body 100.

According to an embodiment, the grounding part 120 may include a height adjusting member such as an inner spring to adjust the height.

The grounding part 120 may ground the contact drain, thereby functioning as a kind of grounding electrode.

The drain can be installed and used to filter food waste and foreign matter. In some cases, the metal sieve and the ground 120 may be in contact with each other.

The ground portion 120 may have a circular circumference. The ground portion 120 may have an open center so that the high voltage generator 110 is connected to the main body 100. The ground portion 120 is preferably formed in the shape of a ring having a center portion. By removing the area unnecessary for discharge, the manufacturing cost and weight of the plasma sterilization apparatus 10 can be reduced.

A voltage is applied to the high voltage generator 110 to generate a grounded drain and plasma discharge, so that sterilization and deodorization may be performed in the drain. Since the sterilization effect of the plasma discharge is known, the detailed description thereof will be omitted.

The high voltage generator 110 may also have a circular circumference and may be formed in a cylindrical shape as a whole. As a result, the drain hole and the discharge area which are inserted into the tubular drain hole internal space and grounded by the grounding part 120 can be secured to the maximum.

The ground portion 120 may have a ring shape with a central portion opened. The plasma sterilization apparatus 10 for drainage may further include a connection part 115 disposed at an open central portion of the ground part 120 to connect the main body 100 and the high contact pressure generating part 110. .

The connecting portion 115 may also have a circular circumference and may be formed in a cylindrical shape as a whole.

The cross-sectional area of the high voltage generator 110 may be larger than the cross-sectional area of the connection unit 115 so that the plasma discharge region may be large.

The plasma sterilization apparatus 10 may include a power supply unit (not shown) for applying a high voltage for generating the high voltage generator 110.

The power supply unit may be accommodated in the main body 100, and the power supply unit may include a rechargeable battery.

When a voltage is applied from the power supply to the high voltage generator 110, a positive high voltage around a circle around the high voltage generator 110 may occur, and a plasma discharge may be generated between a drain hole connected to the ground. May occur.

According to an embodiment, the plasma sterilizing apparatus 10 may further include a rubber support 130 disposed on one surface of the main body 100 to prevent slipping. The ground portion 120 is brought into contact with the drain, and the high voltage generator 110 may be prevented from slipping when the plasma sterilizer 10 is inserted into the drain.

Due to the residual food in the sink drain, microbial growth and odor, which are secondary pollution, can occur. Due to this, many people may feel uncomfortable or unpleasant. In addition, sanitary aspects also require clean management of drains. In particular, frequent cleaning and processing is inconvenient for office workers, and the use of detergents such as wax is increasing.

Sink drains should have a simple structure for sterilization devices due to frequent drainage and should account for wear damage and manageability due to water contact.

In this regard, sterilization and deodorization of contaminants is effective when the sink drain is not used.

According to one embodiment of the present invention, the small plasma sterilization apparatus 10 having a simple structure using plasma technology can be sterilized / deodorized by drainage, thereby removing microorganisms and suppressing odors.

According to an embodiment of the present invention, sterilization and deodorization may be performed by utilizing a plasma sterilization apparatus having a miniaturized structure during drying without using a drain.

Unlike the conventional food sterilization apparatus, the plasma sterilization apparatus 10 may be mounted and coupled to the sink drain if necessary, thereby eliminating inconvenience caused by microbial growth and odor due to residual food.

In particular, when workers put the plasma sterilization apparatus 10 before going to work in the sink drain, it can be sterilized, deodorized, and automatically turned off after a certain time.

Plasma sterilization apparatus 10 according to an embodiment of the present invention, by operating at a low power, can reduce the electricity bill and detergent costs, can also reduce the number of cleaning and treatment, it is possible to improve the ease of use.

In addition, the plasma sterilizing apparatus 10 according to an embodiment of the present invention has no contact with the human body, and can sterilize and deodorize in a short time, and can improve both safety and convenience.

In addition, when not in use, the plasma sterilization apparatus 10 can be separated from the sink drain, and can be stored and managed hygienically.

In addition, the plasma sterilizing apparatus 10 according to an embodiment of the present invention may be separated from the sink drain when not in use to charge the internal battery.

3 and 4 are views referred to in the description of the filling of the plasma sterilizing apparatus for drains according to an embodiment of the present invention.

Referring to FIGS. 3 and 4, in the plasma sterilization apparatus 10 for drainage, a battery is accommodated in the main body 100, and a charging port (not shown) for supplying power to the main body 100 to charge the battery. H) may be formed.

For example, the charging port of the main body 100 may be a USB type port. The internal battery can be charged by connecting a USB type charging cable (cable, 150) to the charging port.

In this case, by using a USB type that is used for charging a lot of IT equipment, it is possible to charge the plasma sterilization apparatus 10 for drains without purchasing a separate charging cable.

In addition, since the plasma sterilization apparatus 10 for the drain port is separated from the drain port, it is connected to a power outlet through a charging cable at a place other than the drain port and charged, thereby preventing water contact during charging.

In addition, since the plasma sterilizing apparatus 10 is sterilized by direct contact with the drain microorganism and plasma discharge, the plasma sterilizing apparatus 10 can be quickly removed in a short time.

5 and 6 are views referred to in the description of the plasma discharge of the plasma sterilizing apparatus for drains according to an embodiment of the present invention.

5 and 6, when the high voltage generator 110 is inserted into and installed in the drain 30, the ground parts 120 of both sides contact the metal mesh of the drain 30. do.

Accordingly, the drain 30 may be grounded. At least the metal mesh of the drain 30 may be grounded.

When a voltage is applied to the high voltage generator 110, plasma discharge occurs in a space between the positive high voltage of the high voltage generator 110 and the drain 30 mesh to sterilize / deodorize the remaining food.

After the cooking and washing, the user installs the plasma sterilization apparatus 10 in the drain 30, and simply turns on the power, so that sterilization and deodorization of the drain can be performed.

When the power of the plasma sterilization apparatus 10 is turned on, power charged in the battery is applied to the high voltage generator 110, and plasma discharge occurs between the grounded drain hole mesh and the high voltage generator 110. Food residues caught on the drain 30 mesh can be sterilized and odors removed.

The plasma sterilization apparatus 10 may be automatically turned off after performing sterilization and deodorization for a predetermined time.

The user may collect and store the plasma sterilization apparatus 10 after resting or doing other work, and may charge the plasma sterilization apparatus 10 if necessary.

On the other hand, the uniform spacing between the grounded drainage 30 mesh and the high voltage generator 110 in which the plasma discharge occurs is helpful for uniform and stable plasma discharge.

However, although the shape and size of the drain hole are generally standardized, the shape and size of the drain hole may have different shapes and sizes, and the plasma sterilization device 10 may be disposed at an optimal position according to the user's method of using the plasma sterilization device 10. May not be placed on.

Therefore, there is a need for a method capable of optimizing the spacing between the plasma sterilizing apparatus 10 and the drain 30, in particular, the spacing between the high voltage generator 110 and the drain 30.

7 to 10 is a view referred to the description regarding the spacing control of the plasma sterilizing apparatus for drains according to an embodiment of the present invention,

7 to 10, the plasma sterilization apparatus 10 for drains according to an embodiment of the present invention has a high contact pressure generating unit 110 based on a point of contact with the drain port 30 of the grounding part 120. ) May further include a gap adjusting unit 150 for adjusting the vertical length of the vertical exposure.

The gap adjusting unit 150 may include an infrared sensor 155 for sensing a horizontal gap with the drain port 30, and may adjust the vertical length based on the sensed horizontal gap.

In addition, the interval adjusting unit 150, the infrared sensor 155 is disposed at the end of the moving rail 152 to move in the vertical direction, and the moving rail 152 is the end of the high voltage generating unit 110 It may further include a driving motor 160 to protrude downward a predetermined distance.

In addition, the gap adjusting unit 150 may further include a processor 154 for processing sensing data of the infrared sensor 155 at the end and controlling movement and gap adjustment of the moving rail 152. The processor 154, the moving rail 152, and the like may be accommodated in the case 151.

According to an embodiment, the gap adjusting unit 150 may further include a vertical gap spring 153 for vertical length adjustment.

Plasma sterilization apparatus 10 according to an embodiment of the present invention, by adjusting the interval, can generate a uniform plasma discharge, by maintaining a sterilization power at a minimum electric field to reduce the power consumption can be driven low power.

The electric field is proportional to the voltage and inversely proportional to the electrode spacing, as shown below.

E: electric field

ΔV: Potential difference

d: electrode spacing

Since a high voltage is applied to the high voltage generator 110, the electrode spacing must be constant to form a constant electric field.

For example, when the plasma sterilization apparatus 10 disposed in the drain port 30 is viewed from a predetermined angle, the interval d1 between the left end of the high voltage generator 110 and the drain port 30 and the high voltage generator ( It is preferable that the interval d2 between the right end of the 110 and the drain 30 is the same, and the interval d3 between the lower end of the high voltage generator 110 and the drain 30 is the same.

Therefore, the interval adjusting unit 150 determines the horizontal intervals d1 and d2 of the high voltage generating unit 110 and the drain 30 by using the infrared sensor 155, and determines the determined horizontal intervals d1 and d2. ), The vertical spacing d3 can be equally adjusted.

11 is a view referred to for describing the operation method of the plasma sterilization apparatus for drains according to an embodiment of the present invention.

Referring to FIGS. 7 to 11, when the plasma sterilization apparatus 10 is mounted in the drain hole 30 (S1110), the infrared sensor 155 of the gap controller 150 is driven (S1120).

The processor 1540 of the interval adjusting unit 150 measures the reflected light of the infrared light output by the infrared sensor 155 about 360 degrees from the end of the moving rail 152 (S1130), and the high voltage generator 110. It is possible to calculate the horizontal spacing between the drain 30 mesh (S1140).

Thereafter, the interval adjusting unit 150 has a vertical interval based on the calculated horizontal interval (S1150).

For example, if the calculated horizontal spacing is less than 2 mm, the vertical spacing may be adjusted to 2 mm. In addition, if the calculated horizontal spacing is 2mm to 4mm, the vertical spacing may be adjusted to 3mm, and if the calculated transverse spacing exceeds 4mm, the vertical spacing may be adjusted to 4mm.

According to the exemplary embodiment, the plasma sterilization apparatus 10 may also adjust the voltage applied to the high voltage generator 110 based on the horizontal interval and the vertical interval (S1360).

For example, if the calculated horizontal interval is less than 2mm, the vertical interval is adjusted to 2mm, a voltage of 4.5kv may be applied to the high voltage generator 110. In addition, if the calculated horizontal spacing is 2mm to 4mm, the vertical spacing is adjusted to 3mm, a voltage of 6.8kv can be applied to the high voltage generator 110. In addition, when the calculated horizontal interval exceeds 4mm, the vertical interval may be adjusted to 4mm, and a voltage of 9kv may be applied to the high voltage generator 110.

Accordingly, efficient plasma discharge can be generated at low power.

12 is a conceptual view illustrating a front surface of a plasma sterilization apparatus for drains according to an embodiment of the present invention, and FIG. 13 is an exploded view of the plasma sterilization apparatus for drains according to an embodiment of the present invention.

12 and 13, the plasma sterilizing apparatus 20 for drains according to an embodiment of the present invention includes a grounding sieve net 230 having a mesh structure of a metal material, and the grounding sieve net 230. ) May include a ground connection part 235 for grounding the ground connection part 235, a high voltage connection part 210 for generating a plasma discharge, a high voltage connection part 215 for applying a voltage to the high voltage part 210. .

The ground portion filtering net 230 may include a ring-shaped base having a central opening and a filtering net for passing water falling into the opening central portion and filtering food waste, foreign substances, and the like.

The ground connection part 235 may be formed of a metal material to ground the ground part sieve 230. The ground connector 235 may include a protrusion 236 to facilitate grounding and to be easily separated from other components, thereby improving convenience of use.

The high voltage connection unit 215 may be connected to a power supply unit (not shown) to apply a high voltage necessary for plasma discharge to the high voltage unit 210. The high voltage connector 215 may include a protrusion 216 to facilitate voltage application and to be easily separated from other components, thereby improving convenience of use.

The high voltage unit 210 may receive a voltage through the high voltage connection unit 215 to generate a plasma discharge with the grounded strainer 230 and perform sterilization and deodorization in the drain.

According to an embodiment, the high voltage unit 210 may be a high voltage filter network having a mesh structure of a metal material.

Alternatively, the high voltage unit 210 may be configured of a plurality of electrode plates spaced apart from each other.

Meanwhile, the plasma sterilizing apparatus 20 for drains according to the embodiment of the present invention may further include an insulation unit 220 disposed between the ground connection unit 235 and the high voltage connection unit 215.

The insulating part 220 may be formed of an insulating material, and may separate the ground connection part 235 and the high voltage connection part 215 and insulate between the high voltage part 210 and the ground part sieve 230.

Plasma sterilization apparatus 20 for drains according to an embodiment of the present invention, it may be fixed to the drain so that the power supply is connected to the high voltage connection (215).

14 to 16 are views referred to in the description of the plasma discharge of the plasma sterilizing apparatus for drains according to an embodiment of the present invention.

Referring to FIG. 14, the high voltage unit 210 may be a high voltage filter network having a mesh structure of a metal material.

The ground connection part 235 may ground the ground part strainer 230, and the high voltage part strainer 210 may be disposed to be spaced apart from the ground part strainer 230 by a predetermined distance.

An insulation part 220 for insulation may be disposed between the high voltage connection part 215 and the ground connection part 235.

The high voltage sieve mesh 210 and the ground sieve mesh 230 may be more preferably made of stainless so as not to rust.

The high voltage connecting part 210 may be connected to the high voltage connecting part 215 made of a metal material to apply a high voltage necessary for plasma discharge.

When the high voltage connection unit 215 applies a high voltage to the high voltage filter network 210, there is a gap between the high voltage filter network 210 and the ground filter network 230 may cause a plasma discharge.

Referring to FIGS. 14 and 15, the high voltage filter mesh 210 may have a positive high voltage, and the grounded filter mesh 230 that is grounded may have an electric field formed with a relatively negative voltage, and plasma discharge may occur.

Plasma generated between the high voltage filter mesh 210 and the ground filter mesh 230 can sterilize foreign substances caught in the high voltage filter mesh 210 and the ground filter mesh 230 to remove odors.

Referring to FIG. 16, the high voltage unit 210 may include a plurality of electrode plates 211 spaced apart from each other.

The ground connection part 235 may ground the ground part strainer 230, and a plurality of electrode plates 211 may be disposed to be spaced apart from the ground part strainer 230 by a predetermined distance.

The plurality of electrode plates 211 and the ground part sieve 230 may be more preferably made of stainless so as not to rust.

A high voltage connection part (not shown) made of metal may be connected to the plurality of electrode plates 211 to apply a high voltage necessary for plasma discharge.

When the high voltage connection unit applies a high voltage to the plurality of electrode plates 211, a plasma discharge may occur due to a gap between the plurality of electrode plates 211 and the ground sieve 230.

On the other hand, the water may be discharged through the water discharge unit 250 is generated in the separation interval between the plurality of electrode plates 211 spaced apart from each other.

The electrode plate 211 may have a positive high voltage, and the ground filter sieve 230 grounded may have an electric field formed with a relatively negative voltage, and plasma discharge may occur.

The plasma generated between the electrode plate 211 and the ground sieve 230 may sterilize foreign substances caught in the ground sieve 230 and remove odors.

According to at least one of the embodiments of the present invention, it is possible to miniaturize and improve the ease of use.

According to at least one of the embodiments of the present invention, it is possible to provide a plasma sterilization apparatus for drainage is improved sterilization and deodorization performance.

In addition, according to at least one of the embodiments of the present invention, it is possible to provide a plasma sterilization apparatus for drainage is easy to install and use.

In addition, according to at least one of the embodiments of the present invention, there is no contact with the human body can provide a more safe and hygienic plasma sterilization apparatus for drains.

Plasma sterilization apparatus for drains according to the present invention is not limited to the configuration and method of the embodiments described as described above, the embodiments are all or part of each of the embodiments is optional so that various modifications can be made It may be configured in combination.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the 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 spirit or the prospect of the present invention.

Plasma sterilizers for drains: 10, 20
Body: 100
High voltage generator: 110
Ground: 120
High voltage strainer: 210
High voltage connection: 220
Ground strainer: 230
Earth connection: 235

Claims (13)

main body;
A grounding part disposed on one surface of the main body and grounded in contact with a drain; And,
And a high voltage generator connected to one surface of the main body to generate the drain and the plasma discharge. The method of claim 1,
The grounding portion is a plasma sterilization apparatus for drainage, characterized in that the ring shape of the center portion opening. The method of claim 2,
Plasma sterilization apparatus for a drain hole further comprises; a connecting portion disposed in the open central portion of the ground portion connecting the main body and the high contact pressure generating portion. The method of claim 3,
Cross-sectional area of the high voltage generating portion is greater than the cross-sectional area of the connecting portion plasma sterilization apparatus for drains. The method of claim 1,
Plasma sterilization apparatus for drainage further comprising; rubber support portion disposed on one surface of the main body to prevent slipping. The method of claim 1,
A battery is accommodated in the main body, and the main body is formed in the main body, the charging port for supplying power for charging the battery is formed. The method of claim 1,
And a spacing adjuster configured to adjust a vertical length of the high contact pressure generating part exposed downward based on a point of contact with the drain port of the ground part. The method of claim 7, wherein
The spacing controller includes an infrared sensor for sensing a horizontal spacing with the drain, and based on the sensed horizontal spacing, the plasma length sterilization apparatus for the drain. The method of claim 8,
The gap adjusting unit, the infrared sensor is disposed at the end and the movable rail moving in the vertical direction, and the drive motor for moving the movable rail so as to protrude a predetermined distance below the end of the high voltage generating portion for drainage Plasma sterilization apparatus. A ground sieve having a mesh structure made of metal;
A ground connection to ground the ground filter;
A high voltage unit for generating a plasma discharge network and the ground filter;
Plasma sterilization apparatus for a drain, including; a high voltage connection for applying a voltage to the high voltage sieve screen. The method of claim 10,
Plasma disinfection device for a drain further comprising an insulating portion disposed between the ground connection and the high voltage connection. The method of claim 10,
The high voltage unit is a plasma sterilization apparatus for drainage, characterized in that the high voltage filter sieve having a mesh (mesh) structure of the metal material. The method of claim 10,
The high voltage unit is a plasma sterilizing apparatus for drain holes, characterized in that composed of a plurality of electrode plates spaced apart from each other.

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