KR20180099040A - Apparatus for heating liquid - Google Patents

Abstract

According to one embodiment of the present invention, an apparatus for heating a liquid comprises a container storing a liquid; one or more first electrodes provided in the container; one or more second electrodes provided in the container and disposed between adjacent first electrodes; one or more dielectric regions which are positioned at each gap between the first electrodes and the second electrodes which are adjacent to each other and in which the liquid stays; and a power supply unit applying an AC voltage to one or more first electrodes and one or more second electrodes. The liquid present in the dielectric region is heated to generate a state-converted gas. Therefore, the heat transfer efficiency can be improved.

Description

[0001] APPARATUS FOR HEATING LIQUID [0002]

The present invention relates to a liquid heating apparatus in which a liquid is heated to produce a gas, wherein gas is produced in a dielectric region formed between the plurality of electrodes.

High frequency induction heating is also called a radio heater, and there are a dielectric heating (induction heating) and an induction heating (induction heating) method.

The dielectric heating is a principle in which the heating body itself generates heat due to the dielectric loss of the insulating material when the insulating material is placed in the high frequency electric field. Induction heating is a self heating phenomenon due to loss of swirling current or hysteresis in the conductor when an electric conductor is placed in the high frequency magnetic field. do.

Generally, an induction heating method using a heating coil used for heating a liquid generates a magnetic field by a current flowing in a heating coil, and generates an overcurrent in the heated member. At this time, in the heating method using a plurality of heating coils, the coils are disposed adjacent to each other in order to prevent temperature decrease at the boundary of each heating coil. Thus, the magnetic field generated by one of the heating coils affects the other heating coils and causes mutual induction between the heating coils.

Such a change in the load variation due to the mutual induction between the heating coils causes a distortion of the current (heating coil current) in each heating coil and causes a phase deviation between the heating coil currents.

Accordingly, in the induction heating system using a plurality of heating coils, when the frequencies of the respective load currents coincide with each other and the phases of the respective heating coil currents are not kept constant, high-precision control of the heating temperature becomes difficult, There is a problem of reducing the temperature.

In order to solve such a problem, a method of inserting a magnetic force interrupting coil between the heating coils and absorbing the magnetic flux at the end of the heating coil has been proposed. However, since the magnetic flux is absorbed by the interrupting coil to decrease the temperature, There is no problem.

The liquid heating apparatus using the plurality of heating coils configured in this way instantaneously heats a large amount of liquid, and since the heat is released only at the position where the heating coil is provided, the heating area is not formed so large that the heating rate of the liquid is limited. have.

In recent years, in order to solve such problems of induction heating, drying and adhesion of wood, vulcanization of rubber, molding of synthetic resin, processing of vinyl, adhesion of vinyl film (high frequency bonding), drying of fibers, processing of agricultural and marine products, (Microwave oven) and the like are being studied.

This is because, even when the insulator having a low thermal conductivity, which is a characteristic of the dielectric heating method, is high in efficiency due to the heat generated by the heated body itself and can be heated at a desired location, It is necessary to develop various technologies of the liquid heating device to reduce the maintenance cost.

It is an object of the present invention to provide a liquid heating apparatus in which a liquid existing in a dielectric region is heated and converted into a gas.

It is another object of the present invention to provide a liquid heating apparatus in which a liquid present in a dielectric region is uniformly heated and transformed into a gas to shorten a heating time.

It is still another object of the present invention to provide a liquid heating apparatus which applies an AC voltage to a plurality of electrodes to maintain a constant temperature at which liquid in a dielectric region is heated.

It is still another object of the present invention to provide a liquid heating apparatus in which liquid present in a dielectric region is heated without deviation to improve heat transfer efficiency.

According to an aspect of the present invention, there is provided a liquid heating apparatus including a container for storing a liquid, at least one first electrode provided in the container, At least one second electrode disposed between the first electrodes, at least one dielectric region located between the first electrode and the second electrode adjacent to each other, the at least one dielectric region in which the liquid exists, and the at least one first electrode And a power unit for applying an alternating voltage to the at least one second electrode, and generates a state-converted gas by heating the liquid present in the dielectric region.

In an embodiment, the container may include a supply hole for supplying the liquid to the inside and a discharge hole for discharging the gas to the outside.

In an embodiment, the liquid comprises pure water, and the gas may comprise steam.

In an exemplary embodiment, the at least one first electrode and the at least one second electrode may include a plate shape.

In an embodiment, the at least one first electrode and the at least one second electrode may include a cylindrical shape having the same center in cross section.

In one embodiment, the first electrode and the second electrode are at least two or more even numbers, and each of the pair of first electrodes and the pair of second electrodes has one semicircular shape separated from a virtual center line, And another semi-circular shape facing the semicircular shape of FIG.

In an embodiment, the alternating voltage may comprise an alternating pulse voltage.

In the embodiment, the power supply unit may vary the magnitude of the AC voltage according to at least one of the conductivity of the liquid, the area of the first electrode, the area of the second electrode, the area of the dielectric region, Can be changed.

The at least one dielectric region may include an initial heating region and a heating region in which the electrical area or volume of the at least one dielectric region is varied depending on a distance between the first electrode and the second electrode, And may include at least one or more.

In an embodiment, the spaced distance between the first electrode and the second electrode of the initial heating region may be less than a specified reference or less than the spaced distance of the first electrode and the second electrode in the heating region have.

At least one of the at least one first electrode and the at least one second electrode may include a shape in which the width of the at least one of the at least one first electrode and the at least one second electrode is narrowed in the longitudinal direction toward the other neighboring electrode.

According to another embodiment of the present invention, there is provided a plasma display panel comprising a first electrode, a first conductor in the form of a sphere coupled with the first electrode, a second electrode, a second electrode coupled to the second electrode, A second conductor formed in two hemispherical envelope configurations, a dielectric region located between the first conductor and the second conductor, the dielectric region comprising a liquid, the second conductor and the second conductor, And at least one insulating part forming an electric discontinuity part between one electrode and a power part applying an alternating current power to the first electrode and the second electrode, wherein the liquid present in the dielectric area is heated, Gas.

In an embodiment, the liquid comprises pure water, and the gas may comprise steam.

In an embodiment, the alternating voltage may comprise an alternating pulse voltage.

In the embodiment, the power supply unit may vary the magnitude of the AC voltage according to at least one of the conductivity of the liquid, the area of the first electrode, the area of the second electrode, the area of the dielectric region, Can be changed.

In an embodiment, the dielectric region may include a supply hole for supplying the liquid to the inside and a discharge hole for discharging the steam to the outside.

In an embodiment, the dielectric region may include a first dielectric region and a second dielectric region that are separated based on the supply hole and the discharge hole.

In an embodiment, the insulation may maintain a constant distance between the first conductor and the second conductor that determines the size of the dielectric region.

The effect of the liquid heating apparatus according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, the liquid present in the dielectric region can be uniformly heated and transformed into a gas to shorten the heating time.

According to at least one of the embodiments of the present invention, an AC voltage is applied to the plurality of electrodes to maintain the temperature at which the liquid in the dielectric region is heated.

According to at least one of the embodiments of the present invention, the liquid present in the dielectric region can be heated without deviation to improve the heat transfer efficiency.

1 is a view showing a heating principle of a liquid heating apparatus according to an embodiment of the present invention.
2 is a cross-sectional view of a liquid heating apparatus according to an embodiment of the present invention.
3 and 4 are views showing electrode shapes of a liquid heating apparatus according to another embodiment of the present invention.
5 to 8 are views showing a superheating area and a heating area of a liquid heating apparatus according to another embodiment of the present invention.
9 and 10 are views showing electrode shapes including curved portions in a liquid heating apparatus according to another embodiment of the present invention.
11 is a cross-sectional view of a liquid heating apparatus according to another embodiment of the present invention.
12 is a perspective view of a liquid heating apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

However, it should be understood that various other components may be included in the liquid heating apparatus in the introduction of the characteristic functions according to the present invention, It is evident to those of ordinary skill in the art.

1 is a view showing a heating principle of a liquid heating apparatus 10 according to an embodiment of the present invention. Referring to FIG. 1, a liquid heating apparatus 10 includes a dielectric 13 (a heating target) positioned between a first electrode 11 and a second electrode 12.

An AC voltage 14 is applied to the first electrode 11 and the second electrode 12 to change the direction of the dipole constituting the dielectric body 13 in accordance with the alternating AC electric field to change the frequency . At this time, frictional heat of the dipole is generated in the dielectric body 13 by the generated vibration, and the dielectric body 13 is heated. When the frequency and the applied voltage of the AC voltage are increased in this heating principle 10, the vibration of the dipole is accelerated and the heating effect can be enhanced.

2 is a cross-sectional view of a liquid heating apparatus according to an embodiment of the present invention.

2, the liquid heating apparatus 100 includes a container 110, at least one first electrode 120, at least one second electrode 130, a dielectric region 140, and a power source 150 can do.

First, the container 110 may include a supply hole 111 for supplying a liquid into the container 110 and a discharge hole 112 for discharging gas to the outside of the container 110. The liquid may be pure water or ozonated water, and the gas may be steam.

The supply hole 111 is connected to an external supply unit (not shown) and a supply line (not shown) to allow liquid to flow into the container 110.

At this time, the discharge hole 112 can discharge the gas generated inside the container 110 to the outside of the container 110.

The first electrode 120 may be formed in a plate shape within the container 110, and may have a plurality of the first electrodes 120.

The second electrode 130 may be formed in a plate shape within the container 110. When the first electrodes 120 are formed of a plurality of the first electrodes 120, a plurality of the first electrodes 120 may be provided.

In other words, the first electrode 120 and the second electrode 130 are spaced apart from each other by a predetermined distance to form a width between the electrodes, and depending on the volume (or area) of the container and the capacity of the liquid stored in the container, The electrodes 120 and 130 may be alternately arranged in the order of the first electrode 120, the second electrode 130, the first electrode 120, and the second electrode 130.

In addition, a dielectric region 140 may be formed between the first electrode 120 and the second electrode 130.

Specifically, the dielectric region 140 is a region determined by the width of the electrodes, and may be formed between the neighboring first electrode 120 and the second electrode 130.

In addition, the dielectric region 140 may be a hollow region, and when a liquid exists in the hollow region, the dielectric region 140 may be a heating region for heating the liquid to transform the liquid into a gas.

That is, a plurality of dielectric regions 140 are formed through alternate arrangements such as the first electrode 120, the dielectric region 140, the second electrode 130, the dielectric region 140, and the first electrode 120 .

The power supply unit 150 is connected to the first electrode 120 and the second electrode 130 and applies an AC voltage to the first electrode 120 and the second electrode 130. At least one of the magnitude and the frequency of the AC voltage according to at least one of the conductivity of the liquid, the area of the first electrode 120, the area of the second electrode 130, and the area of the dielectric region 140 Or more.

In addition, the AC voltage used in the liquid heating apparatus 100 according to the present invention may include an AC pulse voltage.

Particularly, by changing at least one of the magnitude and the frequency of the AC voltage used in the liquid heating apparatus 100 according to the present invention, it is possible to control the temperature for generating the gas, shorten the power operation time, Can

In the following description, examples in which the liquid includes pure water and the gas includes steam will be specifically described. However, this is only one example for convenience of explanation, and it will be apparent to those skilled in the art that the liquid and gas according to the present invention are not limited to pure water and steam.

As shown in FIG. 2, the container 110 is connected to an external supply unit (not shown) and a supply line (not shown) to receive pure water through the supply hole 111.

Pure water is introduced into the dielectric region 140 formed between the first electrode 120 and the second electrode 130 provided in the container 110 and the first electrode 120 and the second electrode 130, The dielectric region 140 is submerged in pure water.

The power source 150 connected to the first electrode 120 and the second electrode 130 applies an AC voltage to the first electrode 120 and the second electrode 130, respectively.

As a result, in the dielectric region 140 formed between the first electrode 120 and the second electrode 130 to which the AC voltage is applied, pure water can be electrolyzed or supplied with energy and can be vaporized. In addition, the generated heat is transferred to the pure water existing in the dielectric region 140, so that the heat transfer area inside the vessel 110 is enlarged, so that steam can be generated uniformly.

The steam is discharged to the outside through the discharge hole 112 and can be moved to a nozzle (not shown) for cleaning the substrate.

Particularly, according to the present invention, since the liquid present in the dielectric region 140 is heated without deviation to improve the heat transfer efficiency, the heat loss is reduced, the heating rate for generating steam is increased, .

3 and 4 are views showing electrode shapes of a liquid heating apparatus according to another embodiment of the present invention.

Referring to FIGS. 3 and 4, the first electrode 120 and the second electrode 130 may include a cylindrical shape having a center having the same cross-section, and may have a semicircular shape separated from a virtual center line, And may include one semi-circular shape and another semi-circular shape facing each other.

It can be seen that as the area of the first electrode 120 and the second electrode 130 increases, the dielectric region 140 can be formed wider.

As a result, as the dielectric region 140 is increased, the heating time in which a large amount of liquid is quickly and uniformly heated and converted into a gas is shortened, and as a result, the gas generation amount can be increased.

5 to 8 are diagrams showing a superheating area and a heating area of a liquid heating apparatus according to another embodiment of the present invention,

5 to 8, the liquid heating apparatus 100 includes a container 110, a first electrode unit 120 having at least one first electrode 121, at least one second electrode 131, A dielectric region 140, and a power source 150. The second electrode portion 130 may include a first electrode portion 130, a second electrode portion 130,

The first electrode part 120 includes at least one first electrode 121, the second electrode part 130 includes at least one second electrode 131, and the dielectric area 140 And the power supply unit 150 will be omitted from the description of FIG. 1 to FIG.

The dielectric region 140 may be formed in a region where the first electrode portion 120 and the second electrode portion 130 are spaced apart from each other by a mechanical or electrical operation, And a heating zone.

6 and 7, the distance A between the first electrode 121 and the second electrode 131 in the X-axis direction is included in the heating region and the distance between the first electrode 121 And the distance B between the first electrode portion 130 and the second electrode portion 130 are included in the initial heating region. It will be apparent to those skilled in the art, however, that this is only one example for convenience of explanation and that the heating zone and the initial heating zone according to the direction of the present invention are not limited to this example.

The initial heating zone can supply the heated liquid to the heating zone by heating the liquid present in the initial heating zone prior to the heating zone. As a result, the liquid heated in the initial heating region is supplied to the heating region to increase the heating efficiency in the heating region, so that the time during which the state-converted gas is generated can be shortened.

At this time, the distance B between the first electrode 121 and the second electrode unit 130 in the initial heating region is smaller than a specific reference, or the distance between the first electrode 121 and the second electrode 131 (A).

In addition, the gas having undergone the state transition of the heated liquid in the initial heating region and the heating region is discharged through the discharge hole 122 provided in the first electrode portion 120. The gas discharged from the discharge hole 122 provided in the first electrode unit 120 is discharged to the outside through the discharge hole 122 provided in the vessel 110.

As shown in FIG. 7, the first electrode 121 and the second electrode 131 are provided in a plurality of shapes, and may be formed to have a narrower width in the longitudinal direction toward the neighboring other electrode.

For example, when the distance B between the first electrode 121 and the second electrode unit 130 in the Y-axis direction is described, the first electrode 121 is electrically connected to the second electrode unit 130, Axis direction toward the Y-axis direction.

As a result, the area or volume of the dielectric region included in the initial heating region is reduced so that the liquid present in the initial heating region can be heated before the liquid present in the heating region.

In other words, the area or volume of the dielectric region corresponding to the initial heating region included in the dielectric region 140 is reduced because the inter-electrode distance B in the initial heating region is shorter than the interelectrode distance A in the heating region .

As a result, the present invention enables a part of the liquid to be heated earlier than the liquid in the other area to raise the heating efficiency.

9 and 10 are views showing an electrode unit having a curved portion in a liquid heating apparatus according to another embodiment of the present invention.

9 and 10, the liquid heating apparatus 100 includes a container 110, a first electrode unit 120 having at least one first electrode 121, at least one second electrode 131, A dielectric region 140, and a power source 150. The second electrode portion 130 may include a first electrode portion 130, a second electrode portion 130,

At this time, the initial heating region may be a region including the distance B between the first electrode 121 and the second electrode portion 130 in the Y-axis direction. In the initial heating region, the second electrode unit 130 may include a U-shaped electrode unit including a curved shape and a second electrode 131 at both ends of the curved shape.

As a result, as compared with the liquid heating apparatus of FIG. 5, the first electrode 121 and the second electrode unit 130 in the Y-axis direction are spaced apart from each other due to the curved shape of the second electrode unit 130 in FIG. The distance B can be increased. The liquid heating apparatus of FIG. 9 includes a first electrode 121 and a second electrode unit 130 having a curved shape of the second electrode unit 130 to increase the area or volume of the liquid stored between the first electrode 121 and the second electrode unit 130 The amount of the liquid initially heated by the curved second electrode unit 130 in the initial heating region can be increased.

In addition, when AC voltage is applied to the first electrode 121 and the second electrode 131, as compared with the liquid heating apparatus of FIG. 5, the first electrode 121 and the second electrode 131 The arc discharge which can be generated between the curved shapes can be relatively reduced.

In addition, since the first electrode unit 120 and the second electrode unit 130 can be mass-produced through a mold, the manufacturing cost can be reduced.

7, the first electrode 121 may be formed to have a narrower width in the Y-axis direction toward the second electrode unit 130. Referring to FIG.

FIG. 11 is a cross-sectional view of a liquid heating apparatus according to another embodiment of the present invention, and FIG. 12 is a perspective view of a liquid heating apparatus according to another embodiment of the present invention.

11 and 12, the liquid heating apparatus 200 includes first electrodes 211 and 212, a first conductor 230, second electrodes 221 and 222, second conductors 241 and 242 Dielectric portions 251 and 252, a power supply portion 260, and an insulating portion 270. [

Herein, the description of the power supply unit 260 will not be repeated.

The first electrodes 211 and 212 may include a plurality of electrodes and may be electrically coupled to the sphere-shaped first conductor 230.

The second electrodes 221 and 222 are formed of a plurality of electrodes and may be combined with the hemi-sphere-shaped second conductors 241 and 242.

Here, the second conductors 241 and 242 may be formed in a plurality of hemispherical shapes so as to surround the first conductor 230 from the outside. In particular, it is preferable that the second conductors 241 and 242 are formed in two hemispherical shapes.

In other words, the first conductor 230 and the second conductor 241, 242 coupled to the first electrode 211, 212 and the second electrode 221, 222, respectively, according to the present invention, And an electrode for providing an AC electric field to the heating target existing in the heating target.

That is, the first conductor 230 and the second conductor 242 included in the present invention are spaced apart from each other by a predetermined distance to form a width between the conductors 230, 241, and 242, Dielectric regions 251 and 252 can be formed.

At this time, the insulating portion 270 may form an electrical discontinuity between the second conductors 241 and 242 and the first electrode 230.

11 and 12, the first electrodes 211 and 212 passing through the second conductors 241 and 242 and the second conductors 241 and 242 are separated from each other by the insulating portion 270 1 conductors 230 and second conductors 241 and 242 may form dielectric regions 251 and 252. [ Here, a plurality of first electrodes 211 and 212 and an insulating portion 270 for forming the dielectric regions 251 and 252 may be provided.

The dielectric regions 251 and 252 are formed by a plurality of hemispherical second conductors 221 and 222 such that a supply hole 241 for supplying a liquid into the dielectric regions 251 and 252 and a dielectric region 251 , And 252, respectively. Here, the liquid may be pure water or ozonated water, and the gas may be steam.

At this time, the supply hole 241 may be connected to an external supply unit (not shown) and a supply line (not shown) to allow liquid to flow into the dielectric regions 251 and 252, 251, and 252 can be discharged to the outside of the dielectric regions 251 and 252. At this time, the gas is discharged to the outside through the discharge hole 242 and can be moved to a nozzle (not shown) for cleaning the substrate

The dielectric regions 251 and 252 may form a first dielectric region 251 and a second dielectric region 252 separated by reference to the supply hole 241 and the discharge hole 242.

As a result, as the liquid is dispersed into the first dielectric region 251 and the second dielectric region 252, the liquid for generating gas can be increased, and the heating rate is thereby increased, Can be shortened further.

As a result, the liquid heating apparatus according to the present invention can quickly and uniformly heat the liquid present in the dielectric region, thereby shortening the heating time in which the gas is generated.

In addition, since the temperature at which the liquid present in the dielectric region is heated can be maintained constant by applying the AC voltage to the plurality of electrodes, the liquid present in the dielectric region can be heated without any deviation, and the heat transfer efficiency can be improved.

It will be apparent to those skilled in the art that various modifications and equivalent arrangements may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims

Accordingly, the foregoing detailed description should not be construed in any way as limiting and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (18)

A container for storing liquid;
At least one first electrode provided in the container;
At least one second electrode provided in the container and disposed between neighboring first electrodes;
At least one dielectric region located between the first and second electrodes adjacent to each other and in which the liquid is present; And
And a power unit for applying an AC voltage to the at least one first electrode and the at least one second electrode,
Wherein the liquid in the dielectric region is heated to produce a state-converted gas. The method according to claim 1,
The container may include:
A supply hole for supplying the liquid to the inside, and a discharge hole for discharging the gas to the outside. The method according to claim 1,
The liquid,
Including pure water,
The gas,
A liquid heating apparatus comprising steam. The method according to claim 1,
Wherein the at least one first electrode and the at least one second electrode are formed on the substrate,
A liquid heating apparatus comprising a plate shape. The method according to claim 1,
Wherein the at least one first electrode and the at least one second electrode are formed on the substrate,
And a cylindrical shape having the same center in cross section. The method according to claim 1,
Wherein the first electrode and the second electrode are made of a metal,
At least two or more even numbers,
Wherein each of the pair of first electrodes and the pair of second electrodes comprises:
And one semicircular shape spaced apart from a virtual centerline and another semicircular shape facing the one semicircular shape. The method according to claim 1,
The alternating-
A liquid heating apparatus comprising an AC pulse voltage. The method according to claim 1,
The power supply unit,
At least one of the magnitude and the frequency of the AC voltage is changed according to at least one of the conductivity of the liquid, the area of the first electrode, the area of the second electrode, the area of the dielectric area, and the volume of the dielectric area . The method according to claim 1,
Wherein the at least one dielectric region comprises:
And at least one of an initial heating region and a heating region in which an electrical area or a volume of the at least one dielectric region is varied depending on a distance between the first electrode and the second electrode. 10. The method of claim 9,
Wherein the spaced distances between the first electrode and the second electrode in the initial heating region,
Wherein the distance between the first electrode and the second electrode in the heating region is less than a specified reference or less than the distance between the first electrode and the second electrode in the heating region. 10. The method of claim 9,
At least one of the at least one first electrode and the at least one second electrode,
And a shape narrowing in width in the longitudinal direction toward another neighboring electrode. At least one first electrode;
A sphere-shaped first conductor coupled with the first electrode;
At least one second electrode;
A second conductor coupled to the second electrode and configured in two hemi-shape shapes to surround the first conductor externally;
A dielectric region located between the first conductor and the second conductor, the dielectric region comprising a liquid;
At least one insulating portion forming an electrical discontinuity between the second conductor and the first electrode; And
And a power unit for applying an AC power to the first electrode and the second electrode,
Wherein the liquid in the dielectric region is heated to produce a state-converted gas. 13. The method of claim 12,
The liquid,
Including pure water,
The gas,
A liquid heating apparatus comprising steam. 13. The method of claim 12,
The alternating-
A liquid heating apparatus comprising an AC pulse voltage. 13. The method of claim 12,
The power supply unit,
At least one of the magnitude and the frequency of the alternating-current voltage according to at least one of the conductivity of the liquid, the area of the first conductor, the area of the second conductor, the area of the dielectric area, and the volume of the dielectric area . 13. The method of claim 12,
Wherein the dielectric region comprises:
A supply hole for supplying the liquid to the inside, and a discharge hole for discharging the steam to the outside. 17. The method of claim 16,
Wherein the dielectric region comprises:
And a plurality of dielectric regions including a first dielectric region and a second dielectric region that are separated based on the supply hole and the discharge hole. 13. The method of claim 12,
Wherein the insulating portion comprises:
Wherein a distance between the first conductor and the second conductor that determines the size of the dielectric region is kept constant.

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