WO2017135706A2 - Heater and method for manufacturing same - Google Patents

Abstract

A heater comprises a heating body including ceramics and carbon conductors and that is integrally formed, and an electrical terminal electrically connected to the heating body. The ceramics include a structural ceramic that is not conductive, the carbon conductors include any one of carbon, carbon nanotubes, and graphene, or a combination of some or all of same, and the heating body has conductivity by virtue of the carbon conductors distributed over the entire heating body.

Description

Heater and manufacturing method thereof

The present invention relates to a heater and a method of manufacturing the same, and more particularly to a heater comprising a heating body comprising a ceramic and a carbon conductor and a method of manufacturing the heater. The present invention also relates to a heater including a ceramic body and a carbon conductor and having a heat insulating body having an insulated surface. It also relates to a heater comprising a ceramic and a carbon conductor and having an efficient structure.

As interest in eco-friendly energy increases, development of eco-friendly vehicle-related parts such as electric vehicles and fuel cell vehicles is being actively performed. Since such an eco-friendly vehicle does not have an engine and cannot implement heating by using waste heat of the engine, a separate heater for stably implementing heating using a high voltage is required. In addition, in the case of a diesel engine, it takes a considerable time until the heat exchange medium for cooling the engine is heated at the initial start of the car, a separate heater is required.

In general, as a heating device for a vehicle, a heater employing a PTC thermistor (PTC thermistor) that can be used semi-permanently with a low risk of fire is used. There was. In addition, when the surface of the heater is formed of a conductive material, additional insulation coating is required, which results in a complicated structure and high manufacturing cost. In addition, there is a problem in that the structure of the heater is complicated and the manufacturing cost is high, since an overheat prevention circuit configured separately for temperature control of the heater is required.

Accordingly, the technical problem of the present invention is conceived in this respect, the object of the present invention is to provide a heater having a simple structure, light weight, improved strength, and reduced manufacturing cost.

Another object of the present invention is to provide a method of manufacturing the heater.

In order to achieve the above object of the present invention, a heater according to the present invention includes a ceramic body and a carbon conductor, integrally formed with a heating body, and an electrical terminal electrically connected to the heating body. The ceramic includes a structural ceramic having no conductivity, and the carbon conductor includes any one or some or all combinations of carbon, carbon nanotubes, and graphene, and the heating body is distributed throughout the heating body. The said carbon conductor has electroconductivity.

According to an embodiment of the present invention, the ceramic may include alumina and silicon oxide.

According to an embodiment of the present invention, the ceramic may further include iron oxide and / or potassium oxide.

According to an embodiment of the present invention, the heating body may include 60 to 95 wt% of the ceramic and 5 to 40 wt% of the carbon conductor.

According to an embodiment of the present invention, the terminal includes a first terminal and a second terminal, the first terminal is disposed on one side of the heat generating body, the second terminal is one side of the heat generating body It may be disposed on the other side facing the.

According to an embodiment of the present invention, the heater is disposed on an upper surface to which the one side and the other side of the heat generating body connect, and in plan view, between the first electrical terminal and the second electrical terminal. It may further comprise a third electrical terminal disposed. The heating body may include a plurality of slit-shaped openings passing through the heating body, and the openings may be disposed at equal intervals between the first terminal and the second terminal, and may have the same shape. The openings may be formed between the first electrical terminal and the third electrical terminal and between the second electrical terminal and the electrical third terminal.

According to an embodiment of the present invention, the heater may further include a coupling member for fixing the heating body and the first and second electrical terminals, and a third electrical terminal. The heat generating body may include a first heat generating body and a second heat generating body disposed adjacent to the first heat generating body. The third electrical terminal may be disposed between the first heat generating body and the second heat generating body to be electrically connected to the first heat generating body and the second heat generating body.

According to an embodiment of the present invention, the heating body may further include a third heating body adjacent to the first heating body and a fourth heating body adjacent to the second heating body. The third electrical terminal may be disposed between the third heat generating body and the fourth heat generating body to be electrically connected to the third heat generating body and the fourth heat generating body.

According to an embodiment of the present invention, the heater may further include first to fourth coupling members. The first to fourth coupling members may be coupled to each other to fix the heat generating body and the first and second electrical terminals. The first to fourth coupling members may surround side surfaces of the heat generating body so that the top and bottom surfaces of the heat generating body are exposed to the outside. The coupling member of any one of the first to fourth coupling members may include a connector, and end portions of the first electrical terminal and the second electrical terminal may be exposed to the outside.

According to an embodiment of the present invention, the first and second electrical terminals may be attached to the heat generating body using a conductive adhesive.

According to an embodiment of the present invention, the surface of the heat generating body may be surrounded by an insulator except for a portion electrically connected by direct contact with the first electrical terminal and the second electrical terminal.

According to an embodiment of the present invention, the insulator may be an oxide film formed on the surface of the heat generating body.

According to an embodiment of the present invention, a first electrical terminal accommodating portion and a second electrical terminal accommodating portion are formed in the heat generating body, and the first electrical terminal accommodating portion and the second electrical terminal accommodating portion are formed on the heat generating body. The first electrical terminal accommodating portion and the second electrical terminal accommodating portion may be portions that are electrically connected by direct contact with the first electrical terminal and the second electrical terminal of the heat generating body. The first electrical terminal may be accommodated in the first electrical terminal accommodating portion, and the second electrical terminal accommodating portion may be accommodated in the second electrical terminal accommodating portion.

In order to achieve the above object of the present invention, a method of manufacturing a heater according to the present invention includes mixing a ceramic powder and a carbon conductor to prepare a raw material powder, a raw material powder mixing step, a drying step of drying the raw material powder, and drying the A molding step of molding the heating body using the raw material powder, a sintering step of sintering the molded heating body, and an assembly step of coupling an electrical terminal to the heating body. In the raw material mixing step, the ceramic powder includes a structural ceramic powder having no conductivity, and the carbon conductor includes any one or some or all combinations of conductive carbon, carbon nanotubes, and graphene. .

According to an embodiment of the present invention, in the assembling step, the heating body and the first and second electrical terminals are coupled using a coupling member for fixing the heating body and the first and second electrical terminals. Can be.

According to an embodiment of the present invention, the manufacturing method is a heat treatment step of heating the surface of the sintered heating body after the sintering step to form an oxide film on the heating body, and after the heat treatment step, the first And an oxide film removing step of removing the oxide film in a portion where the second electrical terminal contacts the heat generating body so that each of the first and second electrical terminals can be electrically connected to the heat generating body.

According to an embodiment of the present invention, the oxide film may be removed by a polishing process.

According to an embodiment of the present invention, in the oxide film removing step, the portion where the oxide film is removed on the heat generating body forms a groove on the heat generating body to form an accommodation portion in which the first or second electrical terminals are accommodated. can do. In the assembling step, the first or second electrical terminals may be accommodated in the accommodation portion.

According to one embodiment of the invention, in the heat treatment step, the heat generating body may be heated for about 5 to 15 minutes at about 400 to 800 degrees Celsius.

According to an embodiment of the present invention, in the raw material powder mixing step, the ceramic powder may include alumina (Al ₂ O ₃ ) and silicon oxide (SiO ₂ ).

According to an embodiment of the present invention, in the raw material powder mixing step, the raw material powder may include 60 to 95% by weight of the ceramic powder, and may include 5 to 40% by weight of the carbon conductor.

According to an embodiment of the present invention, in the raw material powder mixing step, the ceramic powder and the carbon conductor may be mixed and ground to form the raw material powder.

According to one embodiment of the present invention, the sintering step may be performed in a vacuum or argon gas atmosphere.

According to an embodiment of the present invention, in the forming step, the raw material powder may be added using a mold corresponding to the heat generating body to form the heat generating body.

In order to achieve the above object of the present invention, a heater according to the present invention includes a first heating body, a second heating body adjacent to the first heating body in a second direction perpendicular to the first direction, and the second heating body. A third heat generating body adjacent to the second direction, a first portion extending in the first direction and in contact with the first heat generating body, extending in parallel with the first portion, and having the second heat generating body and the third heat generating; A first electrode including a second portion disposed between the body and a connecting portion connecting the first portion and the second portion and extending in the second direction, and extending in the first direction, wherein the first heat generating body And a first portion disposed between the second heating body and the second portion extending in parallel with the first portion and in contact with the third heating body, and connecting the first portion and the second portion to the second direction. Extended by And a second electrode comprising a joint.

According to an embodiment of the present invention, the first to third heating bodies are integrally formed of a mixture of ceramic and carbon conductor, the ceramic comprises a structural ceramic having no conductivity, and the carbon conductor is carbon, It may include at least any one of carbon nanotubes, and graphene.

According to an embodiment of the present invention, each of the first to third heating bodies extends in the second direction, and in the third direction perpendicular to the first and second directions, respectively. Slit-shaped openings penetrating the heating bodies may be formed.

According to an embodiment of the present invention, the heater may further include a first electrical terminal electrically connected with the first portion of the first electrode, and a second electrical terminal in contact with the connection portion of the second electrode. Can be.

According to an embodiment of the present invention, the heater may further include an overheat protection unit disposed between the first electrical terminal and the first portion of the first electrode.

According to one embodiment of the invention, the overheat protection unit may include a PTC element which is a barium carbonate-based switching element.

According to an embodiment of the present invention, the heater may further include a heat dissipating unit for dissipating heat generated by the overheat preventing unit adjacent to the overheat preventing unit.

According to one embodiment of the invention, the heater is a fourth heat generating body disposed adjacent to the third heat generating body in the second direction, and a first portion in contact with the fourth heat generating body and extending in the first direction And a third electrode connected to the first portion, extending in the second direction, and in contact with the extension of the first electrode. The second portion of the second electrode may be disposed between the third heating body and the fourth heating body.

According to an embodiment of the present invention, the heater is a fourth heating body adjacent to the first heating body in the first direction, the fifth heating body adjacent to the second heating body in the first direction, the first The third heating body may further include a sixth heating body adjacent to the first heating body and a third electrical terminal electrically connected to the first heating body.

According to one embodiment of the present invention, the heater extends in the first direction, the first portion in contact with the fourth heat generating body, extends in parallel with the first portion and the fifth heat generating body and the sixth heat generating And a second portion disposed between the body and a connecting portion connecting the first portion and the second portion and extending in the second direction. And a first portion extending in the first direction and disposed between the fourth heating body and the fifth heating body, a second portion extending in parallel with the first portion and in contact with the sixth heating body, and the first portion. The display device may further include a fourth electrode connecting the first portion to the second portion and including a connecting portion extending in the second direction. The third electrode and the second electrical terminal may contact each other.

According to an embodiment of the present disclosure, the heater may further include an overheat prevention rod electrically connected to the first portion of the first electrode, and a second electrical terminal contacting the connection portion of the second electrode. have. The overheat protection rod includes a first electrical terminal, a cover surrounding the first electrical terminal, and a PTC element part, which is a barium carbonate-based switching element disposed between the cover and the first electrical terminal, wherein the portion of the first electrical terminal May be exposed to the outside of the cover.

According to an embodiment of the present invention, in order to fix the first to third heating bodies and the first and second electrical terminals, further comprising a coupling member surrounding the edge of the first to third heating bodies. can do.

According to an embodiment of the present invention, the coupling member may include a first coupling member, a second coupling member, a third coupling member, and a fourth coupling member. The first coupling member may be adjacent to the third heat generating body in the second direction to receive a portion of the third heat generating body. The second coupling member may be adjacent to the first heat generating body in the second direction to receive a portion of the first heat generating body. The third coupling member may be adjacent to the first to third heat generating bodies in the first direction and receive a portion of side surfaces of the first to third heat generating bodies. The fourth coupling member may be adjacent to the first to third heat generating bodies in the first direction and receive a portion of the side opposite to the side of the first to third heat generating bodies.

According to an embodiment of the present invention, an oxide film may be formed on the surfaces of the first to third heating bodies.

According to an embodiment of the present invention, the heater is disposed between at least one of two components adjacent to each other among the first to third heat generating bodies and the first and second electrodes, and thus coupling force of the respective components. It may further include a conductive adhesive to improve.

In order to achieve the above object of the present invention, a heater according to the present invention includes a first heating body, a second heating body adjacent to the first heating body, a third heating body adjacent to the second heating body, and the first A first electrode electrically connected to the heat generating body and electrically connected to the third heat generating body and a first electrode disposed between the second heat generating body and the third heat generating body, and between the first heat generating body and the second heat generating body. And a second electrode disposed at the second electrode, a first electrical terminal electrically connected to the first electrode and to which an external power source is applied, and a second electrical terminal electrically connected to the second electrode and to a external power source.

According to an embodiment of the present invention, when the external power is applied, the first electrical terminal, the first electrode, the first heat generating body (or the second heat generating body or the third heat generating body), and the second The current may flow in the order of the electrode, the second electrical terminal (or vice versa).

According to an embodiment of the present invention, the electronic device may further include an overheat prevention unit including a PTC element disposed between the first electrical terminal and the first electrode.

A heater according to embodiments of the present invention includes an integrally formed heating body comprising a non-conductive ceramic and a carbon conductor having conductivity. Since the ceramic of the heating body is a structural ceramic used in a structure or the like, it is relatively inexpensive, thereby lowering the manufacturing cost and improving productivity. Accordingly, since the heat generating body can operate as a heat generating element having conductivity without requiring a separate configuration, it is possible to provide a heater having a simple structure and reduced manufacturing cost.

In addition, the heating body may provide a heater that emits far-infrared rays useful to the human body as a ceramic heating material.

In addition, the heater manufacturing method is to produce a heating body through the steps of mixing, drying, molding, sintering the raw material powder, and attaching a terminal to the heating body, the structure is simple, the manufacturing cost is reduced heater Can provide.

In addition, an oxide film formed by oxidizing a component of the heating body may be formed on the heating body. The surface of the heater is insulated by the oxide film, thereby providing a heater having a simple structure and a reduced manufacturing cost.

In addition, the manufacturing method of the heater may include a raw material powder mixing step, drying step, molding step, sintering step, heat treatment step, polishing step and assembly step. Thereby, the heater can be manufactured efficiently.

In addition, the heater may include one heating body or a plurality of separate heating bodies. After fabricating heat generating bodies having the same size, the heater may be assembled using the heat generating bodies, terminals and coupling members suitable for the size of the heater. Accordingly, since the same heating body part can be applied to heaters of various sizes and capacities, the efficiency of the manufacturing process can be improved.

In addition, after the heating bodies are manufactured, the heaters may be assembled using the heating bodies, electrodes, electrical terminals, and coupling members appropriately according to the size of the heater. Accordingly, since the same heating body part can be applied to heaters of various sizes and capacities, the efficiency of the manufacturing process can be improved.

In addition, the heating body of the heater has a structure that is firmly fixed by being pressed by the first and second coupling members in the longitudinal direction of the heater, the adhesion between the heating body and the electrodes is improved, the Poor electrical contact between components in the heater can be reduced.

In addition, since the heater has a structure of excellent adhesion in the longitudinal direction between the components constituting the heater regardless of the assembly position of each of the heat generating bodies, quality deterioration due to poor electrical contact can be minimized.

1 is a perspective view of a heater according to an embodiment of the present invention.

2 is a plan view of the heater of FIG. 1.

3 is a perspective view of a heater according to an embodiment of the present invention.

4 is a plan view of the heater of FIG. 3.

5 is a flowchart illustrating a method of manufacturing the heater of FIG. 1.

6 is a perspective view of a heater according to an embodiment of the present invention.

7 is a plan view of the heater of FIG. 6.

FIG. 8 is a cross-sectional view taken along line II ′ of FIG. 7.

9 is an exploded perspective view of the heater of FIGS. 6 to 8.

10 is a perspective view of a heater according to an embodiment of the present invention.

FIG. 11 is a plan view of the heater of FIG. 10.

FIG. 12 is a cross-sectional view taken along line II ′ of FIG. 11.

13 is an exploded perspective view of the heater of FIGS. 10 to 12.

14 is a flowchart illustrating a method of manufacturing the heater of FIG. 6.

15 is an exploded perspective view of a heater according to an embodiment of the present invention.

FIG. 16 is a plan view illustrating a coupling relationship between main components of the heater of FIG. 15.

FIG. 17 is a plan view illustrating main components of the heater of FIG. 15.

18A-18C are partially enlarged plan views according to various assembly positions of the first heating body of the heater of FIG. 15.

19 is a plan view showing main components of a heater according to an embodiment of the present invention.

20 is a plan view showing main components of a heater according to an embodiment of the present invention.

21 is an exploded perspective view of a heater according to an embodiment of the present invention.

22 is an exploded perspective view of the overheat prevention rod of FIG. 21.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

1 is a perspective view of a heater according to an embodiment of the present invention. 2 is a plan view of the heater of FIG. 1.

1 and 2, the heater includes a heat generating body 100, a first electrical terminal TM1, and a second electrical terminal TM2.

The heating body 100 includes a ceramic and a carbon conductor. The ceramic is a structural ceramic used in a structure or the like may be used that is not conductive. The structural ceramics may include fine ceramics, alumina ceramics, zirconia ceramics, silicon carbide, and the like. For example, the ceramic may be a main component of alumina (Al ₂ O ₃ ) and silicon oxide (SiO ₂ ). In addition, the ceramic may further comprise other incidental components. For example, the ceramic may further include iron oxide (Fe ₂ O ₃ ), potassium oxide (K ₂ O), and the like.

The carbon conductor may have conductivity. Therefore, since the carbon conductor is distributed in the heat generating body 100 as a whole, the heat generating body 100 may have conductivity. The carbon conductor may include any one or a combination of some or all of carbon, carbon nanotubes, and graphene. The carbon may have a structure in which atoms forming a hexagonal structure are stacked. The carbon nanotubes may have a structure in which the hexagonal structure of the carbon single layer has a cylindrical shape. The graphene may have a structure in which only one layer of the hexagonal structure constituting the carbon is separated.

The heating body 100 preferably includes about 60 to 95 wt% of the ceramic and about 5 to 40 wt% of the carbon conductor. The content of the ceramic and carbon conductor may be determined in consideration of the price, specific gravity, weight, strength, and the like of the raw material. That is, when the content of the carbon conductor is less than 5% by weight, the specific resistance value per unit area is too large, the electrical properties are not good, when the content of the carbon conductor is 45% by weight or more, the bonding strength of the ceramic is weak and the strength is low there is a problem. According to the above numerical range, it is possible to manufacture a high-strength lightweight heater having a strength similar to that of a general structural ceramic and having a low specific gravity.

The heating body 100 may be integrally formed. That is, all parts of the heat generating body 100 may be one configuration that is physically connected. A plurality of slit-shaped openings 102 penetrating the heat generating body 100 may be formed in the heat generating body 100.

For example, the heat generating body 100 extends in a second direction D2 crossing the first direction D1, and each of the first electrical terminals TM1 is disposed on both surfaces of the first direction D1. ) And the second electrical terminal TM2 may be disposed. The second direction D2 may be substantially perpendicular to the first direction D1. The heating body 100 may extend in the second direction D2, and an opening area OA may be disposed between the first electrical terminal TM1 and the second electrical terminal TM2. A plurality of slit-shaped openings 102 extending in the first direction D1 and having a width in the second direction D2 may be formed in the opening region OA. Each of the openings 102 may penetrate the heating body 100 in a third direction D3 substantially perpendicular to the first and second directions D1 and D2. The openings 102 may be arranged at equal intervals and may have the same shape.

The first electrical terminal TM1 may be attached on one side of the heat generating body 100 and may extend along the heat generating body 100 in the second direction D2. The first electrical terminal TM1 of the heat generating body 100 may include a metal such as copper. The first electrical terminal TM1 may be in direct contact with the heat generating body 100 or may be attached using a conductive adhesive, and may be electrically connected to the heat generating body 100. An end of the first electrical terminal TM1 may be exposed to the outside from the heat generating body 100 so that external power may be applied.

The second electrical terminal TM2 may be attached on the other side of the heating body 100 facing the one side of the heating body 100 and may extend along the heating body 100 in the second direction D2. The second electrical terminal TM2 of the heat generating body 100 may include a metal such as copper. The second electrical terminal TM2 may be in direct contact with the heat generating body 100 or may be attached using a conductive adhesive, and may be electrically connected to the heat generating body 100. An end of the second electrical terminal TM2 may be exposed to the outside from the heat generating body 100 so that external power may be applied.

The heater may be operated by supplying voltage to the first and second electrical terminals TM1 and TM2. For example, when a driving voltage is applied to the first electrical terminal TM1 and a ground voltage is applied to the second electrical terminal TM2, the heating body 100 is removed from the first electrical terminal TM1. Through the second electric terminal (TM2) is energized. Accordingly, the heat generating body 100 generates heat and may function as a heater.

Each of the first and second electrical terminals TM1 and TM2 is formed to correspond to the entire heat generating body 100 along the second direction D2, and the openings of the heat generating body 100 may be formed. 102 is formed to have the same shape at equal intervals, and an electrical circuit is configured in which a plurality of resistors having the same resistance value are connected in parallel between the first electrical terminal TM1 and the second electrical terminal TM2. The heating body 100 may have a uniform temperature distribution as a whole.

The shape and position of the terminals of the heater and the openings may be changed as necessary.

If the PTC heater of a conventional PTC thermistor as a heat source, is formed of a rare earth element, the raw material mixing substances such as Pb, Ti as a main component BaTiO ₃ (or BaCo ₃ + TiO ₂₎ uses the electronic ceramic having conductivity. The electronic ceramic is relatively expensive, while the ceramic of the heat generating body 100 according to the present embodiment is a relatively inexpensive structural ceramic used in a structure, and the like, thereby lowering the manufacturing cost and improving productivity.

Accordingly, since the heat generating body 100 can operate as a heat generating element having conductivity without requiring a separate configuration, it is possible to provide a heater having a simple structure and reduced manufacturing cost.

In addition, the heating body 100 may provide a heater that emits far-infrared rays useful to the human body as a ceramic heating material.

3 is a perspective view of a heater according to an embodiment of the present invention. 4 is a plan view of the heater of FIG. 3.

3 and 4, the heater is the heater of FIGS. 1 and 2, except for the first opening 102a and the second opening 102b and the third electrical terminal TM3 of the heating body 100. And may be substantially the same as Therefore, repeated descriptions will be simplified or omitted.

The heater includes a heat generating body 100, a first electrical terminal TM1, a second electrical terminal TM2, and a third electrical terminal TM3.

The heating body 100 includes a ceramic and a carbon conductor. The ceramic is a structural ceramic used in a structure or the like may be used that is not conductive. The carbon conductor may include conductive carbon, carbon nanotubes, and / or graphene.

The heating body 100 may be integrally formed. That is, all parts of the heat generating body 100 may be one configuration that is physically connected. A plurality of slit-shaped openings 102a and 102b penetrating the heat generating body 100 may be formed in the heat generating body 100.

For example, the heat generating body 100 extends in a second direction D2 crossing the first direction D1, and each of the first electrical terminals TM1 is disposed on both surfaces of the first direction D1. ) And the second electrical terminal TM2 may be disposed. The third electrical terminal TM3 may be disposed on an upper surface of the heat generating body 100 between the first electrical terminal TM1 and the second electrical terminal TM2. The second direction D2 may be substantially perpendicular to the first direction D1. The heat generating body 100 extends in the second direction D2, and extends in the second direction D2 between the first electrical terminal TM1 and the second electrical terminal TM2 and is formed in the first direction. The first opening area OA1 and the second opening area OA2 spaced apart from each other in the direction D1 may be disposed. A plurality of slit-shaped first openings and a second extending in the first direction D1 and having a width in the second direction D2 in the first and second opening regions OA1 and OA2. Openings 102a and 102b may be formed. The first and second openings 102a and 102b may penetrate the heat generating body 100 in a third direction D3 substantially perpendicular to the first and second directions D1 and D2. The first and second openings 102a and 102b may be disposed at equal intervals and have the same shape.

The first electrical terminal TM1 may be attached on one side of the heat generating body 100 and may extend along the heat generating body 100 in the second direction D2. The first electrical terminal TM1 of the heat generating body 100 may include a metal such as copper.

The second electrical terminal TM2 may be attached on the other side of the heating body 100 facing the one side of the heating body 100 and may extend along the heating body 100 in the second direction D2. The second electrical terminal TM2 of the heat generating body 100 may include a metal such as copper.

The third electrical terminal TM3 is attached to an upper surface and / or a lower surface connecting the one side and the other side of the heat generating body 100, and the heat generating body 100 in the second direction D2. Can extend along. The third electrical terminal TM3 is disposed between the first electrical terminal TM1 and the second electrical terminal TM2 in plan view, and does not penetrate the heat generating body 100, and generates the heat generating body. Since it is attached to the upper surface of the (100), the end portion of the third electrical terminal (TM3) may be formed to be bent in the third direction (D3). That is, the end of the second direction D2 of the third electrical terminal TM3 is bent in the third direction D3 along the surface of the heat generating body 100 and in the second direction D2. It may protrude from the heat generating body 100. An external power source may be applied to the protruding end of the third electrical terminal TM3.

The heater may be operated by supplying a voltage to the first to third electrical terminals TM1, TM2, and TM3. For example, when a driving voltage is applied to the first electrical terminal TM1 and the second electrical terminal TM2, and a ground voltage is applied to the third electrical terminal TM3, the first electrical terminal TM1. Or from the second electrical terminal TM2 to the second electrical terminal TM2 through the heat generating body 100. Accordingly, the heat generating body 100 generates heat and may function as a heater.

Each of the first to third electrical terminals TM1, TM2, and TM3 is formed to correspond to the entire heat generating body 100 along the second direction D2, and the first portion of the heat generating body 100 is formed. The first and second openings 102a and 102b are formed to have the same shape at the same interval, so that the first electrical terminal TM1 and the third electrical terminal TM3 or the second electrical terminal TM2 and the An electrical circuit in which a plurality of resistors having the same resistance value are connected in parallel between the third electrical terminals TM3 is configured, and the heat generating body 100 may have a uniform temperature distribution as a whole.

The shape and position of the terminals of the heater and the openings may be changed as necessary.

5 is a flowchart illustrating a method of manufacturing the heater of FIG. 1.

Referring to Figure 5, the heater manufacturing method is a raw material powder mixing step (S100), drying step (S200), molding step (S300), sintering step (S400) and terminal attachment step (S450)

In the raw material powder mixing step (S100), the raw material powder is prepared by mixing the ceramic powder and the carbon conductor. The ceramic powder may be a structural ceramic used for forming a structure, and the like, which is non-conductive. The structural ceramics may include fine ceramics, alumina ceramics, zirconia ceramics, silicon carbide, and the like. For example, the ceramic powder may include alumina (Al ₂ O ₃ ) and silicon oxide (SiO ₂ ) as main components. In addition, the ceramic powder may further include other additional ingredients. For example, the ceramic powder may further include iron oxide (Fe ₂ O ₃ ), potassium oxide (K ₂ O), and the like.

The carbon conductor may include any one or a combination of some or all of carbon, carbon nanotubes, and graphene. The carbon may have a structure in which atoms forming a hexagonal structure are stacked. The carbon nanotubes may have a structure in which the hexagonal structure of the carbon single layer has a cylindrical shape. The graphene may have a structure in which only one layer of the hexagonal structure constituting the carbon is separated. The carbon conductor may be provided in powder form and mixed with the raw material powder.

The raw material powder preferably comprises about 60 to 95 wt% of the ceramic powder and may comprise about 5 to 40 wt% of the carbon conductor. The content of the ceramic powder and the carbon conductor may be determined in consideration of the price, specific gravity, weight, strength, and the like of the raw material.

On the other hand, the raw powder may be prepared in various ways. For example, the raw material powder may be obtained by mixing and grinding a ceramic and a carbon conductor.

In the drying step (S200), to dry the raw material powder. For example, the raw material powder may be dried and granulated using a spray dryer or the like.

In the forming step (S300), it is possible to mold the heat generating body (see 100 of FIG. 1) from the dried raw material powder. The raw material powder may be pressed by using a mold or the like corresponding to the heat generating body, thereby forming the heat generating body. For example, primary molding may be performed using a hydraulic press or the like, and then secondary molding may be performed through cold isotropic pressing to obtain a uniform molding density.

In the sintering step (S400), the raw material powder molded into the heating body may be sintered at a high temperature. For example, using a hot press sintering mold corresponding to the heat generating body can be sintered at a high temperature in a vacuum or argon gas atmosphere.

The steps may be carried out in a vacuum state or an argon gas atmosphere to prevent oxidation of the raw material.

In the terminal attaching step (S450), an electric terminal (see TM1, TM2 in Figure 1) is attached to the heat generating body. The terminal may be formed of a metal such as copper. The terminal may be attached to directly contact the heat generating body, or may be attached using a conductive adhesive or the like.

According to the present embodiment, the manufacturing method produces a heating body through mixing, drying, molding, and sintering the raw powder, and attaches a terminal to the heating body, thereby simplifying the structure and reducing the manufacturing cost. A heater can be provided.

6 is a perspective view of a heater according to an embodiment of the present invention. 7 is a plan view of the heater of FIG. 6. FIG. 8 is a cross-sectional view taken along line II ′ of FIG. 7. 9 is an exploded perspective view of the heater of FIGS. 6 to 8.

6 to 9, the heater includes a first heat generating body 110, a second heat generating body 120, a third heat generating body 130, a fourth heat generating body 140, and a first coupling member 210. ), The second coupling member 220, the third coupling member 230, the fourth coupling member 240, the first electrical terminal TM1, the second electrical terminal TM2, and the third electrical terminal TM3. Include.

The first heating body 110 includes a ceramic and a carbon conductor. The ceramic is a structural ceramic used in a structure or the like may be used that is not conductive. The structural ceramics may include fine ceramics, alumina ceramics, zirconia ceramics, silicon carbide, and the like. For example, the ceramic may be a main component of alumina (Al2O3) and silicon oxide (SiO2). In addition, the ceramic may further comprise other incidental components. For example, the ceramic may further include iron oxide (Fe 2 O 3), potassium oxide (K 2 O), or the like.

The carbon conductor may have conductivity. Therefore, since the carbon conductor is entirely distributed in the first heat generating body 110, the first heat generating body 110 may have conductivity. The carbon conductor may include carbon, carbon nanotubes, and / or graphene. The carbon may have a structure in which atoms forming a hexagonal structure are stacked. The carbon nanotubes may have a structure in which the hexagonal structure of the carbon single layer has a cylindrical shape. The graphene may have a structure in which only one layer of the hexagonal structure constituting the carbon is separated.

The first heating body 110 preferably includes about 60 to 95 wt% of the ceramic and about 5 to 40 wt% of the carbon conductor. For example, carbon nanotubes have excellent characteristics similar to copper in electrical conductivity, and are known to have a high strength of about 100 times that of steel in terms of strength. Graphene also has excellent properties in terms of electrical conductivity and strength. The electrical conductivity is known to be about 100 times stronger than silicon and the strength is about 200 times stronger than steel. These carbon conductors have a lower specific gravity than aluminum, for example, and are light in weight and relatively inexpensive. Therefore, when the appropriate amount of these materials are mixed with the ceramic, very good properties can be obtained in terms of electrical conductivity and strength. The content of the ceramic and carbon conductor may be determined in consideration of the price, specific gravity, weight, strength, and the like of the raw material. That is, when the content of the carbon conductor is less than 5% by weight, the electrical resistance as an electric heater is not good because the specific resistance value per unit area is too large, and when the content of the carbon conductor is 45% by weight or more, the bonding strength of the ceramic is weak. There is a problem of low strength. According to the above numerical range, it is possible to manufacture a high-strength lightweight heater having a strength similar to that of a general structural ceramic and having a low specific gravity.

The first heat generating body 110 may be integrally formed. That is, all parts of the first heat generating body 110 may be one configuration that is physically connected. A plurality of slit-shaped openings OP penetrating the first heat generating body 110 may be formed in the first heat generating body 110.

For example, the first heating body 110 extends in a second direction D2 crossing the first direction D1, and each of the first electrical terminals is disposed on both surfaces of the first direction D1. TM1 and the second electrical terminal TM2 may be disposed. The second direction D2 may be substantially perpendicular to the first direction D1. Each of the openings OP may extend in the first direction D1 and have a slit shape having a width in the second direction D2. Each of the openings OP may pass through the first heat generating body 110 in a third direction D3 substantially perpendicular to the first and second directions D1 and D2. The openings OP may be arranged at equal intervals and may have the same shape.

The second heat generating body 120 may be disposed adjacent to the first heat generating body 110 in the first direction D1. The second heating body 120 may be disposed between the second electrical terminal TM2 and the third electrical terminal TM3. The configuration of the second heating body 120 may be substantially the same as the configuration of the first heating body 110.

The third heat generating body 130 is adjacent to the first heat generating body 110 in the second direction D2, and is in contact with the first heat generating body 110, and the first electrical terminal TM1 and the It may be disposed between the second electrical terminal (TM2). The third heat generating body 130 may have a configuration substantially the same as that of the first heat generating body 110.

The fourth heat generating body 140 is adjacent to the second heat generating body 120 in the second direction D2 and is in contact with the second heat generating body 120, and the second electrical terminal TM2 and the It may be disposed between the third electrical terminal (TM3). The fourth heating body 140 may have a configuration substantially the same as that of the first heating body 110.

An oxide film is formed on upper and lower surfaces of the first to fourth heating bodies 110, 120, 130, and 140. The upper and lower surfaces are surfaces perpendicular to the third direction D3. The oxide layer may be formed by oxidizing components constituting the first to fourth heating bodies 110, 120, 130, and 140. For example, heat treatment may be performed on the surfaces of the first to fourth heat generating bodies 110, 120, 130, and 140 to form oxide films on the upper and lower surfaces.

The oxide layer is formed by oxidizing a part of the first to fourth heating bodies 110, 120, 130, and 140 including the ceramic and the carbon conductor, and is an insulator having no conductivity. In addition, the first to fourth coupling members 210, 220, 230, and 240 may also be made of an insulating material. Accordingly, the heater may have a structure in which all surfaces thereof are insulated except for the first to third electrical terminals TM1, TM2, and TM3 of the connector unit 222.

Meanwhile, since the first to third electrical terminals TM1, TM2, and TM3 and the first to fourth heating bodies 110, 120, 130, and 140 are to be electrically connected, the first to third electrodes may be electrically connected. An oxide film should not be formed on the side surfaces of the first to fourth heating bodies 110, 120, 130, and 140 in contact with the electrical terminals TM1, TM2, and TM3. For example, after the heat treatment is performed on the surfaces of the first to fourth heating bodies 110, 120, 130, and 140, the side surfaces may be polished to remove the oxide layer on the side surfaces.

The first coupling member 210 may be adjacent to the first and second heat generating bodies 110 and 120 in the second direction D2. A coupling groove 212 is formed in the first coupling member 210, a part of the first and second heat generating bodies 110 and 120, and the third coupling member 230 in the coupling groove 212. The first coupling protrusion 232 and the first coupling protrusion 242 of the fourth coupling member 240 may be accommodated.

The second coupling member 220 may be adjacent to the third and fourth heating bodies 130 and 140 in the second direction D2. A coupling groove is formed in the second coupling member 220, and a part of the third and fourth heating bodies 130 and 140 and a second coupling protrusion of the third coupling member 230 are formed in the coupling groove. 234 and the second coupling protrusion 244 of the fourth coupling member 240 may be accommodated.

The second coupling member 220 includes a connector portion 222. A portion of the first electrical terminal TM1, the second electrical terminal TM2, and the third electrical terminal TM3 is disposed in the connector part 222 through the second coupling member 220. Accordingly, the connector 222 of the heater may be connected to an external power source for use.

The third coupling member 230 may be adjacent to the first and third heat generating bodies 110 and 130 in the first direction D1. The third coupling member 230 may extend in the second direction D2. The third coupling member 230 may include the first coupling protrusion 232 and the second coupling protrusion 234 formed at both ends of the second direction D2, respectively.

The fourth coupling member 240 may be adjacent to the second and fourth heating bodies 120 and 140 in the first direction D1. The fourth coupling member 240 may extend in the second direction D2. The fourth coupling member 240 may include the first coupling protrusion 242 and the second coupling protrusion 244 respectively formed at both ends of the second direction D2.

The first electrical terminal TM1 may be disposed between the first and third heat generating bodies 110 and 130 and the third coupling member 230 to extend in the second direction D2. The first electrical terminal TM1 may be in direct contact with the first and third heat generating bodies 110 and 130 or may be attached by using a conductive adhesive, and the like. Can be electrically connected. For example, the first electrical terminal TM1 may be attached to the first and third heating bodies 110 and 130 using an epoxy adhesive. An end portion of the first electrical terminal TM1 may be exposed to the outside through the connector portion 222 of the second coupling member 220 so that external power may be applied.

The second electrical terminal TM2 is disposed between the first and third heating bodies 110 and 130 and the second and fourth heating bodies 120 and 140 to extend in the second direction D2. Can be. The second electrical terminal TM2 is in direct contact with the first to fourth heat generating bodies 110, 120, 130, and 140, or is attached using a conductive adhesive, and thus, the first to fourth heat generating bodies 110. , 120, 130, and 140 may be electrically connected. For example, the second electrical terminal TM2 may be attached to the first to fourth heating bodies 110, 120, 130, and 140 using an epoxy adhesive. An end portion of the second electrical terminal TM2 may be exposed to the outside through the connector portion 222 of the second coupling member 220 so that external power may be applied.

The third electrical terminal TM3 may be disposed between the second and fourth heating bodies 120 and 140 and the fourth coupling member 240 to extend in the second direction D2. The third electrical terminal TM3 is in direct contact with the second and fourth heating bodies 120 and 140, or is attached using a conductive adhesive, and the like, so that the third electrical terminal TM3 is connected to the second and fourth heating bodies 120 and 140. Can be electrically connected. For example, the third electrical terminal TM3 may be attached to the second and fourth heating bodies 120 and 140 using an epoxy adhesive. An end portion of the third electrical terminal TM3 may be exposed to the outside through the connector 222 of the second coupling member 220, and external power may be applied thereto.

The heater may be operated by supplying a voltage to the first to third electrical terminals TM1, TM2, and TM3. For example, when a driving voltage is applied to the first electrical terminal TM1 and the third electrical terminal TM3 and a ground voltage is applied to the second electrical terminal TM2, the first electrical terminal TM1 is applied. Or from the third electrical terminal TM3 to the second electrical terminal TM2 through the first, second, third or fourth heating body 110, 120, 130, 140. Accordingly, the first to fourth heat generating bodies 110, 120, 130, and 140 generate heat, and may function as a heater.

Each of the first to third electrical terminals TM1, TM2, and TM3 corresponds to the entirety of the first to fourth heating bodies 110, 120, 130, and 140 along the second direction D2. The openings OP of the first to fourth heating bodies 110, 120, 130, and 140 have the same shape at the same interval. Thereby, between the said 1st electrical terminal TM1 and the said 2nd electrical terminal TM2 or the said 2nd electrical terminal TM2 and the said 3rd electrical terminal TM3, the same resistance value distinguished by each opening is provided. An electric circuit having a plurality of resistors connected in parallel is configured. Since the same voltage is applied to each resistor, each resistor generates substantially the same amount of heat per unit time, and accordingly, the heater may have a uniform temperature distribution. The terminals of the heater, the number of the heating bodies, and The shape, shape and position of the openings can be changed as necessary.

The first coupling member 210, the second coupling member 220, the third coupling member 230, and the fourth coupling member 240 are coupled to each other to form the first to fourth heat generating bodies ( 110, 120, 130, and 140 and the first to third electrical terminals TM1, TM2, and TM3 may be fixed.

In the present embodiment, the heating body is divided into the first to fourth heating body, but is not limited thereto. For example, the heater may include one heating body or may include a plurality of separate heating bodies. After fabricating heat generating bodies having the same size, the heater may be assembled using the heat generating bodies, terminals and coupling members suitable for the size of the heater. Accordingly, since the same heating body part can be applied to heaters of various sizes and capacities, the efficiency of the manufacturing process can be improved.

10 is a perspective view of a heater according to an embodiment of the present invention. FIG. 11 is a plan view of the heater of FIG. 10. FIG. 12 is a cross-sectional view taken along line II ′ of FIG. 11. 13 is an exploded perspective view of the heater of FIGS. 10 to 12.

10 to 13, the heater may be substantially the same as the heater of FIGS. 1 to 4, except for a structure for seating the first to third electrical terminals inside the heater so as not to be exposed to the outside. . Therefore, repeated descriptions will be simplified or omitted.

The heater may include a first heat generating body 110, a second heat generating body 120, a third heat generating body 130, a fourth heat generating body 140, a first coupling member 210, and a second coupling member 220. , A third coupling member 230, a fourth coupling member 240, a first electrical terminal TM1, a second electrical terminal TM2, and a third electrical terminal TM3.

The first electrical terminal accommodating part 112 and the second electrical terminal accommodating part 114 may be formed at both side surfaces of the first heat generating body 110 in the first direction D1, respectively. The first electrical terminal accommodating part 112 and the second electrical terminal accommodating part 114 may extend in a second direction D2, respectively. The first electrical terminal accommodating part 112 is a groove formed on the first heat generating body 110 and together with the first electrical terminal accommodating part 236 of the third coupling member 230, the first electrical terminal. (TM1) can be accommodated. Accordingly, the first electrical terminal TM1 is not exposed to the outside. The second electrical terminal accommodating part 114 may accommodate the second electrical terminal TM2 together with the second electrical terminal accommodating part 122 of the second heat generating body 120. Accordingly, the second electrical terminal TM2 is not exposed to the outside.

The second electrical terminal accommodating part 122 and the third electrical terminal accommodating part 124 may be formed at both side surfaces of the second heat generating body 120 in the first direction D1, respectively. The second electrical terminal accommodating part 122 and the third electrical terminal accommodating part 124 may extend in a second direction D2, respectively. The second electrical terminal accommodating part 122 may be a groove formed on the second heat generating body 120. The third electrical terminal accommodating part 124 may accommodate the third electrical terminal TM3 together with the third electrical terminal accommodating part 246 of the fourth coupling member 140. Accordingly, the third electrical terminal TM3 is not exposed to the outside.

The first electrical terminal accommodating part 132 and the second electrical terminal accommodating part 134 may be formed at both side surfaces of the third heat generating body 130 in the first direction D1, respectively. The first electrical terminal accommodating part 132 and the second electrical terminal accommodating part 134 may extend in the second direction D2, respectively. The first electrical terminal accommodating part 132 is a groove formed on the first heat generating body 130 and together with the first electrical terminal accommodating part 236 of the third coupling member 230, the first electrical terminal. (TM1) can be accommodated. Accordingly, the first electrical terminal TM1 is not exposed to the outside. The second electrical terminal accommodating part 114 may accommodate the second electrical terminal TM2 together with the second electrical terminal accommodating part 142 of the fourth heating body 140. Accordingly, the second electrical terminal TM2 is not exposed to the outside.

The second electrical terminal accommodating part 142 and the third electrical terminal accommodating part 144 may be formed at both side surfaces of the fourth heating body 140 in the first direction D1, respectively. The second electrical terminal accommodating part 142 and the third electrical terminal accommodating part 144 may extend in the second direction D2, respectively. The second electrical terminal accommodating part 142 may be a groove formed on the fourth heating body 140. The third electrical terminal accommodating part 144 may accommodate the third electrical terminal TM3 together with the third electrical terminal accommodating part 246 of the fourth coupling member 140. Accordingly, the third electrical terminal TM3 is not exposed to the outside.

An oxide film is formed on upper and lower surfaces of the first to fourth heating bodies 110, 120, 130, and 140. The upper and lower surfaces are surfaces perpendicular to the third direction D3. The oxide layer may be formed by oxidizing components constituting the first to fourth heating bodies 110, 120, 130, and 140. For example, heat treatment may be performed on the surfaces of the first to fourth heat generating bodies 110, 120, 130, and 140 to form oxide films on the upper and lower surfaces.

The oxide layer is formed by oxidizing a part of the first to fourth heating bodies 110, 120, 130, and 140 including the ceramic and the carbon conductor, and is an insulator having no conductivity. In addition, the first to fourth coupling members 210, 220, 230, and 240 may also be made of an insulating material. Accordingly, the heater may have a structure in which all surfaces thereof are insulated except for the first to third electrical terminals TM1, TM2, and TM3 of the connector unit 222.

Meanwhile, since the first to third electrical terminals TM1, TM2, and TM3 and the first to fourth heating bodies 110, 120, 130, and 140 are to be electrically connected, the first to third electrodes may be electrically connected. An oxide film should not be formed on the side surfaces of the first to fourth heating bodies 110, 120, 130, and 140 in contact with the electrical terminals TM1, TM2, and TM3. For example, after the heat treatment is performed on the surfaces of the first to fourth heating bodies 110, 120, 130, and 140, the side surfaces may be polished to remove the oxide layer on the side surfaces. In this case, the first electrical terminal accommodating part 112 and 132, the second electrical terminal accommodating part 122 and 142, and the third electrical terminal accommodating part 144 and 124 may be formed by grinding a part of the side surfaces. The accommodating parts may accommodate the first to third electrical terminals TM1, TM2, and TM3, and at the same time, the oxide layer may be removed, and thus the first to third electrical terminals TM1, TM2, TM3) may be electrically connected.

In the present exemplary embodiment, the first to third electrical terminals TM1, TM2, and TM3 are accommodated in the first to third electrical terminal accommodating parts, and thus are not exposed to the outside. Therefore, the surface of the heater can be efficiently insulated.

In addition, the first to third electrical terminal accommodating parts are formed by partially removing the oxide films of the first to fourth heat generating bodies through a polishing process, and the like, and thus, through the polishing step of the manufacturing method of the heater without additional processing steps. As such, the manufacturing process can be simplified.

14 is a flowchart illustrating a method of manufacturing the heater of FIG. 6.

Referring to Figure 14, the heater manufacturing method is a raw material powder mixing step (S100), drying step (S200), molding step (S300), sintering step (S400), heat treatment step (S500), polishing step (S600) and Assembly step (S700) is included.

In the raw material powder mixing step (S100), the raw material powder is prepared by mixing the ceramic powder and the carbon conductor. The ceramic powder may be a structural ceramic used for forming a structure, and the like, which is non-conductive. The structural ceramics may include fine ceramics, alumina ceramics, zirconia ceramics, silicon carbide, and the like. For example, the ceramic powder may include alumina (Al 2 O 3) and silicon oxide (SiO 2) as main components. In addition, the ceramic powder may further include other additional ingredients. For example, the ceramic powder may further include iron oxide (Fe 2 O 3), potassium oxide (K 2 O), or the like.

The carbon conductor may include carbon, carbon nanotubes, and / or graphene. The carbon may have a structure in which atoms forming a hexagonal structure are stacked. The carbon nanotubes may have a structure in which the hexagonal structure of the carbon single layer has a cylindrical shape. The graphene may have a structure in which only one layer of the hexagonal structure constituting the carbon is separated. The carbon conductor may be provided in powder form and mixed with the raw material powder.

The raw material powder preferably includes about 60 to 95 wt% of the ceramic powder and about 5 to 40 wt% of the carbon conductor. The content of the ceramic powder and the carbon conductor may be determined in consideration of the price, specific gravity, weight, strength, and the like of the raw material.

On the other hand, the raw powder may be prepared in various ways. For example, the raw material powder may be obtained by mixing and grinding a ceramic and a carbon conductor.

In the drying step (S200), to dry the raw material powder. For example, the raw material powder may be dried and granulated using a spray dryer or the like.

In the forming step (S300), it is possible to mold the first to fourth heating body (see 110 to 140 of Figure 6) from the dried raw material powder. The first to fourth heat generating bodies may be molded by pressing the raw material powder using a mold corresponding to the first to fourth heat generating bodies. For example, primary molding may be performed using a hydraulic press or the like, and then secondary molding may be performed through cold isotropic pressing to obtain a uniform molding density.

In the sintering step (S400), the raw material powder molded into the first to fourth heat generating bodies may be sintered at a high temperature. For example, it is possible to sinter at a high temperature in a vacuum or argon gas atmosphere using a hot press sintering mold corresponding to the first to fourth heat generating bodies.

The steps may be carried out in a vacuum state or an argon gas atmosphere to prevent oxidation of the raw material.

In the heat treatment step (S500), the first to fourth heat generating body is subjected to heat treatment to oxidize the surfaces of the first to fourth heat generating bodies. For example, the surfaces of the first to fourth heating bodies may be oxidized by heating the first to fourth heating bodies at about 400 to 800 degrees Celsius for about 5 to 15 minutes. Preferably, the surface may be oxidized by heating the first to fourth heating bodies at about 600 ° C. for about 10 minutes. The heating temperature and time in the heat treatment step (S500) can be appropriately adjusted according to the component, size, shape of the first to fourth heat generating body to be heat-treated, the surface of the first to fourth heat generating body It may be any condition as long as it is oxidized to form an oxide film on the surface.

In the polishing step (S600), a part of the side surfaces of the first to fourth heating bodies is polished to remove a part of the oxide film. Accordingly, first to third electrical terminals (refer to TM1, TM2, and TM3 of FIG. 6) may be in contact with the first to fourth heat generating bodies at portions where the oxide film is removed.

In the assembling step (S700), the first to fourth heating bodies, the first to third electrical terminals, and the first to fourth coupling members (see 210, 220, 230, and 240 of FIG. 6) are used. Assembly to complete the heater. Depending on the size of the heater, it can be assembled to include an appropriate number of heat generating bodies. That is, after manufacturing the heating body of the same size, it is possible to assemble the heater by using the heating body and the appropriate terminals and coupling members according to the size of the heater as appropriate. Accordingly, since the same heating body part can be applied to heaters of various sizes and capacities, the efficiency of the manufacturing process can be improved.

A heater according to embodiments of the present invention includes an integrally formed heating body comprising a non-conductive ceramic and a carbon conductor having conductivity. An oxide film formed by oxidizing a component of the heat generating body is formed on the heat generating body. The surface of the heater is insulated by the oxide film, thereby providing a heater having a simple structure and a reduced manufacturing cost.

A method of manufacturing a heater according to embodiments of the present invention includes a raw material powder mixing step, a drying step, a molding step, a sintering step, a heat treatment step, a polishing step, and an assembly step. Thereby, the heater can be manufactured efficiently.

In addition, the heater may include one heating body or a plurality of separate heating bodies. After fabricating heat generating bodies having the same size, the heater may be assembled using the heat generating bodies, terminals and coupling members suitable for the size of the heater. Accordingly, since the same heating body part can be applied to heaters of various sizes and capacities, the efficiency of the manufacturing process can be improved.

15 is an exploded perspective view of a heater according to an embodiment of the present invention. FIG. 16 is a plan view illustrating a coupling relationship between main components of the heater of FIG. 15. FIG. 17 is a plan view illustrating main components of the heater of FIG. 15.

15 to 17, the heater may include a first electric terminal TM1, a heat dissipation part 500, an overheat prevention part 400, a first heat generating body 110, a second heat generating body 120, and a second heat generating part 120. 3 heat generating body 130, the first electrode 310, the second electrode 320, the second electric terminal (TM2), the first coupling member 210, the second coupling member 220, the third coupling member ( 230 and the fourth coupling member 240.

The first to third heating bodies 110, 120, and 130 may be sequentially arranged along a second direction D2 perpendicular to the first direction D1.

Each of the first to third heating bodies 110, 120, and 130 includes a ceramic and a carbon conductor. The ceramic is a structural ceramic used in a structure or the like may be used that is not conductive. The structural ceramics may include fine ceramics, alumina ceramics, zirconia ceramics, silicon carbide, and the like. For example, the ceramic may be a main component of alumina (Al ₂ O ₃ ) and silicon oxide (SiO ₂ ). In addition, the ceramic may further comprise other incidental components. For example, the ceramic may further include iron oxide (Fe ₂ O ₃ ), potassium oxide (K ₂ O), and the like.

The carbon conductor may have conductivity. Therefore, since the carbon conductors are generally distributed in the first to third heating bodies 110, 120, and 130, the first to third heating bodies 110, 120, and 130 may have conductivity. . The carbon conductor may include carbon, carbon nanotubes, and / or graphene. The carbon may have a structure in which atoms forming a hexagonal structure are stacked. The carbon nanotubes may have a structure in which the hexagonal structure of the carbon single layer has a cylindrical shape. The graphene may have a structure in which only one layer of the hexagonal structure constituting the carbon is separated.

Each of the first to third heating bodies 110, 120, and 130 preferably includes about 60 to 95 wt% of the ceramic and about 5 to 40 wt% of the carbon conductor. . For example, carbon nanotubes have excellent characteristics similar to copper in electrical conductivity, and are known to have a high strength of about 100 times that of steel in terms of strength. Graphene also has excellent properties in terms of electrical conductivity and strength. The electrical conductivity is known to be about 100 times stronger than silicon and the strength is about 200 times stronger than steel. These carbon conductors have a lower specific gravity than aluminum, for example, and are light in weight and relatively inexpensive. Therefore, when the appropriate amount of these materials are mixed with the ceramic, very good properties can be obtained in terms of electrical conductivity and strength. The content of the ceramic and carbon conductor may be determined in consideration of the price, specific gravity, weight, strength, and the like of the raw material. That is, when the content of the carbon conductor is less than 5% by weight, the electrical resistance as an electric heater is not good because the specific resistance value per unit area is too large, and when the content of the carbon conductor is 45% by weight or more, the bonding strength of the ceramic is weak. There is a problem of low strength. According to the above numerical range, it is possible to manufacture a high-strength lightweight heater having a strength similar to that of a general structural ceramic and having a low specific gravity.

Each of the first to third heating bodies 110, 120, and 130 may be integrally formed. That is, all parts of the first heat generating body 110 may be one configuration that is physically connected. The first heat generating body 110 penetrates the first heat generating body 110 in a third direction D3 perpendicular to the first direction D1 and the second direction D2, and each of the second heat generating body 110 is the second heat generating body 110. A plurality of slit-shaped openings 112 extending in the direction D2 may be formed. The second and third heating bodies 120 and 130 may be substantially the same as the first heating body 110.

The first electrode 310 may include a first portion 314, a second portion 316, and a connection portion 312. The first portion 314 may extend along the first direction D1. The second portion 316 may be spaced apart from the first portion 314 in the second direction D2 and may extend along the first direction D1 in parallel with the first portion 314. The connection part 312 may connect an end of the first part 314 and an end of the second part 316 and may extend in the second direction D2.

The first portion 314 of the first electrode 310 may be disposed between the overheat protection unit 400 and the first heat generating body 110. The second portion 314 of the first electrode 310 may be disposed between the second heat generating body 120 and the third heat generating body 130.

The second electrode 320 may include a first portion 324, a second portion 326, and a connection portion 322. The first portion 324 may extend along the first direction D1. The second portion 326 may be spaced apart from the first portion 324 in the second direction D2 and may extend along the first direction D1 in parallel with the first portion 324. The connection part 322 may connect an end of the first portion 324 and an end of the second portion 326 and may extend in the second direction D2.

The first portion 324 of the second electrode 320 may be disposed between the first heating body 110 and the second heating body 120. The second portion 324 of the second electrode 320 may be disposed between the third heat generating body 130 and the first coupling member 210.

The overheat protection unit 400 may be disposed between the first heat generating body 110 and the first electrical terminal TM1. The overheat protection unit 400 has a resistance value as the temperature increases, thereby blocking or reducing the current flowing toward the first to third heat generating bodies 110, 120, and 130 constituting the heater. Overheating can be prevented. For example, the overheat protection unit 400 may include a PTC device. The PTC element is a barium carbonate-based switching element has a characteristic that the electrical resistance rapidly increases when the temperature rises, it is possible to prevent the heater from overheating. In the present embodiment, the case in which the overheat protection unit 400 includes a PTC element is described. However, the present invention is not limited thereto, and when the temperature of the heater is increased to an appropriate level or more, the first to third heating bodies 110, It may be any configuration that can block or reduce the current flowing to 120, 130).

The first electrical terminal TM1 extends in the first direction D1 and is disposed between the heat dissipation part 500 and the overheat protection part 400 and the second part TM1b and the second part. One side of the TM1b may include a first portion TM1a extending in the second direction D2. The first portion TM1a may protrude out of the second coupling member 220 to be connected to an external power source. For example, a driving voltage (or ground voltage) may be applied to the first electrical terminal TM1.

The second electrical terminal TM2 may extend in the second direction D2 and may be electrically connected to the second electrode 320. The second electrical terminal TM2 may be disposed between the second electrode 320 and the fourth coupling member 240. One end of the second electrical terminal TM2 may protrude out of the second coupling member 220 to be connected to an external power source. For example, a ground voltage (or driving voltage) may be applied to the first electrical terminal TM1.

The heat dissipation part 500 may be disposed in contact with the second portion TM1b of the first electrical terminal TM1. The heat dissipation part 500 may have a plurality of openings penetrating the heat dissipation part 500 in the third direction D3 for efficient heat dissipation. The heat dissipation part 500 may partially dissipate heat generated from the overheat protection part 400 through the first electrical terminal TM1. Since the heat dissipation part 500 may prevent overheating of the overheat protection part 400 itself, the overheat protection part 400 operates in an appropriate temperature range, and thus, the first to third heat generating bodies. It is possible to control the ON / OFF according to the heat of (110, 120, 130).

That is, when the overheat protection unit 400 includes a PTC element, sufficient current is supplied to the first to third heat generating bodies 110, 120, and 130, and thus the temperature of the overheat protection unit 400 itself. When the temperature rises to a specific temperature, the overheat protection unit 400 blocks or reduces the current flowing toward the first to third heat generating bodies 110, 120, and 130. At this time, the overheat protection unit 400 itself is also overheated to a state having a high resistance value. Thereafter, even when the first to third heat generating bodies 110, 120, and 130 are sufficiently cooled, there may be a case in which the overheat prevention unit 400 itself is not cooled in an overheated state. If the overheat protection unit 400 is not properly cooled, the overheat protection unit 400 may still not supply current to the heating bodies, but by the heat dissipation unit 500, the overheat protection unit Since 400 is also cooled, current may be supplied to the first to third heat generating bodies 110, 120, and 130 again.

In another exemplary embodiment, the heat dissipation part 500 may be disposed to contact the overheat protection part 400. The heat dissipation part 500 may be disposed at various positions capable of dissipating heat emitted from the overheat protection part 400.

The first coupling member 210 may be adjacent to the third heat generating body 130 in the second direction D2. The first coupling member 210 is provided with a coupling groove in which the third heat generating body 130 is partially accommodated, and a part of the third heating body 130 in the coupling groove and the third coupling member ( The first coupling protrusion 232 of the 230 and the first coupling protrusion 242 of the fourth coupling member 240 may be accommodated.

The second coupling member 220 may be adjacent to the first heat generating body 110 in the second direction D2. A coupling groove 222 is formed in the second coupling member 220, and the heat dissipation part 500, the first electrical terminal TM1, the overheat protection part 400, are formed in the coupling groove 222. A portion of the first heat generating body 110, a portion of the second electrical terminal TM2, a second coupling protrusion 234 of the third coupling member 230, and a second of the fourth coupling member 240. Coupling protrusion 244 may be accommodated.

The third coupling member 230 may be adjacent to the first to third heat generating bodies 110, 120, and 130 in the first direction D1. The third coupling member 230 may extend in the second direction D2. The third coupling member 230 may include the first coupling protrusion 232 and the second coupling protrusion 234 formed at both ends of the second direction D2, respectively. The third coupling member 230 accommodates a portion of the connecting portion 312 of the first electrode 310 and side surfaces of the first to third heat generating bodies 110, 120, and 130. 310, an accommodating part 236 may be formed to fix the first to third heat generating bodies 110, 120, and 130.

The fourth coupling member 240 may be adjacent to the second and fourth heating bodies 120 and 140 in the first direction D1. The fourth coupling member 240 may extend in the second direction D2. The fourth coupling member 240 may include the first coupling protrusion 242 and the second coupling protrusion 244 respectively formed at both ends of the second direction D2. The second coupling part 240 accommodates a portion of the connecting portion 322 of the second electrode 320 and side surfaces of the first to third heating bodies 110, 120, and 130. 320, an accommodating part may be formed to fix the first to third heat generating bodies 110, 120, and 130.

The first to fourth coupling members 210, 220, 230, and 240 are coupled to each other to form the first to third heat generating bodies 110, 120, and 130, the first electrode 310, and the second. The electrode 320, the first electrical terminal TM1, the second electrical terminal TM2, the heat dissipation part 500, and the overheat protection part 400 may be firmly fixed. The first to fourth coupling members 210, 220, 230, and 240 may be formed of an insulating material.

The heater may be operated by supplying power to the first and second electrical terminals TM1 and TM2. For example, when a driving voltage is applied to the first electrical terminal TM1 and a ground voltage is applied to the second electrical terminal TM2, current is supplied to the first electrical terminal TM1 and the overheat protection unit ( 400, the first electrode 310, the first heating body 110 (or the second heating body 120 or the third heating body 130), the second electrode 320, and the It may flow through the second electrical terminal TM2. Accordingly, the first to third first heat generating bodies 110, 120, and 130 generate heat, and may function as a heater.

In the present embodiment, a case in which the heat generating bodies are divided into three parts has been described. However, after the heat generating bodies having the same size are manufactured, the heat generating bodies, the electrodes and the electrical terminals suitable thereto according to the size of the heater are appropriately described. And the heaters may be assembled using coupling members. Accordingly, since the same heating body part can be applied to heaters of various sizes and capacities, the efficiency of the manufacturing process can be improved.

In addition, the heat generating bodies of the heater are pressurized by the first and second coupling members 410 and 420 in the second direction D2, which is the longitudinal direction of the heater, and thus firmly fixed. The adhesion between the bodies and the electrodes can be improved, thereby reducing the poor electrical contact between the components in the heater.

On the other hand, although not shown, the heater may further include a conductive adhesive to improve the bonding strength of the components constituting the heater. The conductive adhesive may include the first to third heat generating bodies 110, 120, and 130, the first and second electrodes 310 and 320, the overheat protection part 400, and the first and second electrical parts. It is applied between the terminals TM1 and TM2 and the respective components of the heat dissipation part 500, so that the components can be firmly coupled to each other.

In addition, an oxide film may be formed on surfaces of the first to third heat generating bodies 110, 120, and 130 to insulate the outside from the first to third heat generating bodies 110, 120, and 130. In this case, an oxide layer is not formed or removed in the portions of the first to third heating bodies 110, 120, and 130 that contact the first and second electrodes 310 and 320, and thus, the first to third heat generating units. The bodies 110, 120, and 130 and the first and second electrodes 310 and 320 may be configured to be energized with each other.

In this case, the oxide film may be heat-treated on the surfaces of the first to third heat generating bodies 110, 120, and 130 to form oxide films on the upper and lower surfaces. In this case, the oxide film formed by the heat treatment is removed again through a process such as polishing in the portions of the first to third heating bodies 110, 120, and 130 that contact the first and second electrodes 310 and 320. Can be. Accordingly, the heater has a surface except for the ends of the first and second electrical terminals TM1 and TM2 connected to an external power source, and the oxide film and the first to fourth coupling members 410, 420, and 430. , 440 may have an entirely insulated structure.

Specifically, the method of manufacturing the first to third heating bodies 110, 120, 130 may include a raw material powder mixing step, a drying step, a molding step, a sintering step, a heat treatment step, and a polishing step.

In the raw material powder mixing step, the raw material powder is prepared by mixing the ceramic powder and the carbon conductor. The ceramic powder may be a structural ceramic used for forming a structure, and the like, which is non-conductive. The carbon conductor may include carbon, carbon nanotubes, and / or graphene. The carbon conductor may be provided in powder form and mixed with the raw material powder.

The raw material powder preferably includes about 60 to 95 wt% of the ceramic powder and about 5 to 40 wt% of the carbon conductor. The content of the ceramic powder and the carbon conductor may be determined in consideration of the price, specific gravity, weight, strength, and the like of the raw material.

On the other hand, the raw powder may be prepared in various ways. For example, the raw material powder may be obtained by mixing and grinding a ceramic and a carbon conductor.

In the drying step, the raw powder is dried. For example, the raw material powder may be dried and granulated using a spray dryer or the like.

In the molding step, the first to third heat generating body may be molded from the dried raw material powder. The first to third heat generating bodies may be molded by pressing the raw material powder using a mold corresponding to the first to third heat generating bodies. For example, primary molding may be performed using a hydraulic press or the like, and then secondary molding may be performed through cold isotropic pressing to obtain a uniform molding density.

In the sintering step, the raw material powder molded into the first to fourth heat generating bodies may be sintered at a high temperature. For example, it is possible to sinter at a high temperature in a vacuum or argon gas atmosphere using a hot press sintering mold corresponding to the first to fourth heat generating bodies.

The steps may be carried out in a vacuum state or an argon gas atmosphere to prevent oxidation of the raw material.

In the heat treatment step, the surface of the first to third heat generating body is oxidized by performing heat treatment on the first to fourth heat generating bodies. For example, the surfaces of the first to fourth heating bodies may be oxidized by heating the first to third heating bodies at about 400 to 800 degrees Celsius for about 5 to 15 minutes. Preferably, the surface may be oxidized by heating the first to third heating bodies at about 600 ° C. for about 10 minutes. The heating temperature and time in the heat treatment step may be appropriately adjusted according to the constituents, sizes, and shapes of the first to third heat generating bodies to be heat treated, and by oxidizing the surface of the first to third heat generating bodies, It may be any condition as long as an oxide film can be formed on the surface.

In the polishing step, a part of the side surfaces of the first to third heat generating bodies are polished to remove a part of the oxide film. Accordingly, the first and second electrodes may be in contact with the first to third heat generating bodies at the portion where the oxide film is removed.

18A-18C are partially enlarged plan views according to various assembly positions of the first heating body of the heater of FIG. 15.

15 and 18A, a case in which the first heat generating body 110 is assembled to the left side to contact the connection portion 312 of the first electrode 310 is illustrated. Even if the first heat generating body 110 is in contact with the connection portion 312 of the first electrode 310, a current is generated from the connection portion 312 or the first portion 314 of the first electrode 310. Since the first heating body 110 flows through the first portion 324 of the second electrode 320 to the second electrical terminal TM2, the heater may operate normally.

15 and 18B, the first heating body 110 is assembled so as to be spaced apart from the connecting portion 312 of the first electrode 310 and also to be spaced apart from the second electrical terminal TM2. The case is shown. In this case, current flows from the first portion 314 of the first electrode 310 to the second electrical terminal through the first heat generating body 110 and through the first portion 324 of the second electrode 320. Since it flows to TM2, the heater can be operated normally.

15 and 18C, there is shown a case in which the first heat generating body 110 is assembled to be located on the right side to contact the second electrical terminal TM2. Even though the first heating body 110 is in contact with the second electrical terminal TM2, current is discharged from the first portion 314 of the first electrode 310 through the first heating body 110. Since the second electrode 320 flows to the first portion 324 and the second electrical terminal TM2, the heater may operate normally.

Meanwhile, the first to third heat generating bodies 110, 120, and 130 are preferably manufactured in the same shape through the same process. However, variations in size or shape may occur due to variations in the manufacturing process. . However, since the heater according to the present embodiment is firmly fixed regardless of the position or size deviation of the first to third heat generating bodies 110, 120, and 130, and has excellent electrical contact between components, Even when the sizes of the heating bodies are slightly different, defects due to deterioration of the bonding force or electrical contact can be minimized.

As shown in FIGS. 18A to 18C, the heater according to the present embodiment has some errors in the assembly position of the heat generating bodies in the assembling process, or even if a deviation in size occurs between the plurality of heat generating bodies in the manufacturing process, The contact property between the electrode and the heat generating body may not be degraded.

19 is a plan view showing main components of a heater according to an embodiment of the present invention.

Referring to FIG. 19, the heater may be substantially the same as the heater of FIGS. 15 to 17 except that the heater further includes a fourth heating body 140 and a third electrode 330. Therefore, repeated descriptions will be simplified or omitted.

The heater may include a first electric terminal TM1, a heat dissipation part 500, an overheat prevention part 400, a first heat generating body 110, a second heat generating body 120, a third heat generating body 130, and a third heat generating body. 4 The heating body 140, the first electrode 310, the second electrode 320, the third electrode 330, the second electrical terminal (TM2), the first coupling member (see 210 in Fig. 1), the second A coupling member (see 220 of FIG. 1), a third coupling member (see 230 of FIG. 1) and a fourth coupling member (see 240 of FIG. 1) are included.

The fourth heating body 140 may be disposed adjacent to the third heating body 130 in the second direction D2. The fourth heating body 140 may be substantially the same as the first to third heating bodies 110, 120, and 130.

The third electrode 330 is connected to the first portion 336 and the first portion 336 that are in contact with the fourth heating body 140 and extend in the first direction D1, and are in the second direction D2. It may include a connecting portion 332 extending to). The connection part 332 may contact the connection part (see 312 of FIG. 2) of the first electrode 310. The second portion (see 326 of FIG. 2) of the second electrode 320 may be disposed between the third heat generating body 130 and the fourth heat generating body 140.

The first coupling member 210 may be adjacent to the fourth heat generating body 140 in the second direction D2. A coupling groove may be formed in the first coupling member 210 to accommodate a portion of the fourth heating body 140, and a portion of the fourth heating body 140 may be accommodated in the coupling groove. Components of the heater may be firmly fixed by the first to fourth coupling members 210, 220, 230, and 240.

On the other hand, although not shown, the heater may further include a conductive adhesive to improve the bonding strength of the components constituting the heater.

According to the present embodiment, the heater is described when it includes four heating bodies 110, 120, 130, 140 arranged in the second direction D2, and the heaters of FIGS. 15 to 17 are three A case involving heating bodies has been described. In a similar manner, electrodes and heat generating bodies can be added to construct a heater with various numbers of heat generating bodies.

20 is a plan view showing main components of a heater according to an embodiment of the present invention.

Referring to FIG. 20, the heater may include a fourth heating body 140, a fifth heating body 150, a sixth heating body 160, a third electrode 330, a fourth electrode 340, and a second overheating. It may be substantially the same as the heater of FIGS. 15 to 17 except for further including the prevention unit 600, the second heat dissipation unit 700, and the third electrical terminal TM3. Therefore, repeated descriptions will be simplified or omitted.

The heater may include a first electric terminal TM1, a heat dissipation part 500, an overheat prevention part 400, a first heat generating body 110, a second heat generating body 120, a third heat generating body 130, and a third heat generating body. The first electrode 310, the second electrode 320, the second electrical terminal (TM2), the first coupling member (see 210 in Fig. 15), the second coupling member (see 220 in Figure 15), the third coupling member ( 15) and a fourth coupling member (see 240 of FIG. 15). In addition, the heater may include a third electric terminal TM3, a second heat dissipating part 700, a second overheat prevention part 600, a fourth heat generating body 140, a fifth heat generating body 150, and a sixth heat generating device. The body 160 further includes a third electrode 330 and a fourth electrode 340.

The third electrical terminal TM3, the second heat dissipation part 700, the second overheat protection part 600, the fourth heat generating body 140, the fifth heat generating body 150, and the sixth The heat generating body 160, the third electrode 330, and the fourth electrode 340 are the first electrical terminal TM1, the heat dissipation part 500, based on the second electrical terminal TM2. The overheat protection unit 400, the first heating body 110, the second heating body 120, the third heating body 130, the first electrode 310 and the second electrode 320. Are arranged symmetrically and may be substantially the same configuration.

The first to fourth coupling members may surround and fix the first to sixth heating bodies 110, 120, 130, 140, 150, and 160.

The present embodiment extends the heating bodies so that the heater of FIG. 15 is symmetric with respect to the second electrical terminal. In a similar manner, the heating bodies of the heater may extend in the first direction D1. According to another exemplary embodiment, the second overheat protection unit 600 and the second heat dissipation unit 700 may be omitted as necessary.

21 is an exploded perspective view of a heater according to an embodiment of the present invention. 22 is an exploded perspective view of the overheat prevention rod of FIG. 21.

21 and 22, the heater is substantially the same as the heater of FIGS. 15 to 17, except that the heater includes an overheat prevention rod 800 that is integrally assembled instead of the overheat protection unit and the first electrical terminal. Therefore, repeated description is omitted.

The overheat prevention rod 800 includes a cover including a first cover 810 and a second cover 820, a first guide part 830, a second guide part 840, a first electric terminal TM1, A plurality of PTC element parts PTC and a plurality of insulating parts INS may be included.

The first rod 800 may extend in a first direction D1.

The first cover 810 and the second cover 820 may include the PTC element part PTC, the insulation part INS, the first electrical terminal TM1, and the first and second guide parts 830. 840 can be stored. The first cover 810 is coupled to the second cover 820 to form the PTC element part PTC, the insulation part INS, the first electrical terminal TM1, and the first and second guide parts. Surround 830 and 840. The covers 810 and 820 may be formed of metal. For example, the covers 810 and 220 may include aluminum.

The first guide part 830 is disposed between the first electrical terminal TM1 and the first cover 810, and the second guide part 840 is disposed between the first electrical terminal TM1 and the first cover 810. It may be disposed between the two covers 820. The first guide part 830 and the second guide part 840 may be coupled to each other to surround the first electrical terminal TM1. The first and second guide parts 830 and 840 may be formed of an insulating material that does not conduct electricity.

A first opening 832 and a second opening 834 may be formed in the first guide part 830. The insulation part INS may be accommodated in the first opening 832, and the PTC element part PTC may be accommodated in the second opening 834. Accordingly, the PTC element unit PTC may directly contact the first electrical terminal TM1 and the first cover 810.

A third opening 842 and a fourth opening 844 may be formed in the second guide part 840. The PTC element part PTC may be accommodated in the third opening 832, and the insulation part INS may be accommodated in the fourth opening 834. Accordingly, the PTC device unit PTC may directly contact the first electrical terminal TM1 and the second cover 220.

The plurality of insulation parts INS and the plurality of PTC device parts PTC may be alternately arranged along the first direction D1.

One end of the first electrical terminal TM1 may be exposed to the outside of the cover and extend in the second direction D2. The first electrical terminal TM1 may include a metal. For example, the first electrical terminal TM1 may include copper.

The PTC device unit PTC may include a PTC device in the same manner as the overheat protection unit (see 400 of FIG. 15) of FIG. 1. The insulation part INS may be formed of an insulation material that does not conduct electricity.

The heat dissipation part 500 may be disposed to contact the overheat prevention rod 800 in the second direction D2 to prevent overheating of the overheat prevention rod 400 itself.

Since the overheat prevention rod 400 that controls ON / OFF according to the heat of the heat generating bodies 110, 120, 130 of the heater has an assembly structure, assembly of the heater may be further improved.

According to embodiments of the present invention, the heater includes a plurality of heat generating bodies. After manufacturing the heat generating bodies, the heater may be assembled using the heat generating bodies, electrodes, electrical terminals, and coupling members appropriately according to the size of the heater. Accordingly, since the same heating body part can be applied to heaters of various sizes and capacities, the efficiency of the manufacturing process can be improved.

In addition, the heating bodies of the heater have a structure that is firmly fixed by being pressed by the first and second coupling members in the longitudinal direction (second direction) of the heater, the adhesion between the heating body and the electrodes This can be improved to reduce the poor electrical contact between the components in the heater.

In addition, since the heater has an excellent adhesion in the longitudinal direction (second direction) between the components constituting the heater regardless of the assembly position of each of the heat generating bodies, the quality deterioration due to poor electrical contact, etc. is minimized Can be.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

<Description of the code>

110: first heat generating body 120: second heat generating body

130: third heat generating body 210: first coupling member

220: second coupling member 230: third coupling member

240: fourth coupling member 310: first electrode

320: second electrode 400: overheat prevention unit

500: heat dissipation unit TM1: first electrical terminal

TM2: second electrical terminal

Claims (42)

1. A heating body integrally formed with a ceramic and a carbon conductor; And

   An electrical terminal electrically connected to the heating body,

   The ceramic includes a structural ceramic having no conductivity, and the carbon conductor includes any one or some or all combinations of carbon, carbon nanotubes, and graphene, and the heating body is distributed throughout the heating body. A heater characterized by having conductivity by said carbon conductor.
2. According to claim 1,

   And wherein the ceramic comprises alumina and silicon oxide.
3. The method of claim 2,

   The ceramic is characterized in that it further comprises iron oxide and / or potassium oxide.
4. According to claim 1,

   The heating body is a heater, characterized in that containing 60 to 95% by weight of the ceramic, 5 to 40% by weight of the carbon conductor.
5. According to claim 1,

   The terminal includes a first terminal and a second terminal, the first terminal is disposed on one side of the heat generating body, the second terminal is disposed on the other side facing the one side of the heat generating body. Heater characterized in that.
6. The method of claim 5,

   The heater further includes a third electrical terminal disposed on an upper surface of the one side and the other side of the heat generating body, and connected between the first electrical terminal and the electrical second terminal in plan view. and,

   The heating body is formed with a plurality of slit-shaped openings penetrating the heating body, the openings are disposed at equal intervals between the first terminal and the second terminal, have the same shape,

   And the openings are formed between the first electrical terminal and the third electrical terminal and between the second electrical terminal and the electrical third terminal.
7. The method of claim 5,

   A coupling member for fixing the heat generating body and the first and second electrical terminals; And

   Further comprising a third electrical terminal,

   The heat generating body includes a first heat generating body and a second heat generating body disposed adjacent to the first heat generating body,

   And the third electrical terminal is disposed between the first heating body and the second heating body to be electrically connected to the first heating body and the second heating body.
8. The method of claim 7, wherein

   The heating body further includes a third heating body adjacent to the first heating body and a fourth heating body adjacent to the second heating body,

   And the third electrical terminal is disposed between the third heating body and the fourth heating body and is also electrically connected to the third heating body and the fourth heating body.
9. The method of claim 5,

   Further comprising first to fourth coupling members, The first to fourth coupling members are coupled to each other to fix the heat generating body and the first and second electrical terminals,

   The first to fourth coupling members surround side surfaces of the heat generating body so that the top and bottom surfaces of the heat generating body are exposed to the outside.

   The coupling member of any one of the first to fourth coupling members includes a connector portion, wherein the ends of the first electrical terminal and the second electrical terminal are exposed to the outside.
10. The method of claim 5,

    And the first and second electrical terminals are attached to the heat generating body using a conductive adhesive.
11. The method of claim 5,

    The surface of the heat generating body is a heater, characterized in that the remaining portion is surrounded by an insulating material, except for the portion that is electrically connected by direct contact with the first electrical terminal and the second electrical terminal.
12. The method of claim 11,

    The insulator is a heater, characterized in that the oxide film formed on the surface of the heat generating body.
13. The method of claim 12,

    A first electrical terminal accommodating portion and a second electrical terminal accommodating portion are formed in the heat generating body, the first electrical terminal accommodating portion and the second electrical terminal accommodating portion are grooves formed on the heat generating body, and the first electrical terminal accommodating portion is provided. And the second electrical terminal accommodating portion is a portion electrically connected by direct contact with the first electrical terminal and the second electrical terminal of the heat generating body,

    And the first electrical terminal is accommodated in the first electrical terminal accommodating portion, and the second electrical terminal accommodating portion is accommodated in the second electrical terminal accommodating portion.
14. A raw material powder mixing step of preparing a raw material powder by mixing the ceramic powder and the carbon conductor;

    A drying step of drying the raw material powder;

    A molding step of forming a heat generating body using the dried raw material powder;

    A sintering step of sintering the molded heating body; And

    An assembly step of coupling an electrical terminal to the heating body,

    In the raw material mixing step, the ceramic powder includes a structural ceramic powder having no conductivity, and the carbon conductor includes any one or some or all combinations of conductive carbon, carbon nanotubes, and graphene. The manufacturing method of the heater characterized by the above-mentioned.
15. The method of claim 14,

    In the assembling step, a heater manufacturing method characterized in that for coupling the heat generating body and the first and second electrical terminals using a coupling member for fixing the heat generating body and the first and second electrical terminals.
16. The method of claim 15,

    A heat treatment step of heating the surface of the sintered heating body after the sintering step to form an oxide film on the heating body; And

    After the heat treatment step, the oxide film removing step of removing the oxide film in the portion where the first and second electrical terminals contact the heat generating body so that each of the first and second electrical terminals can be electrically connected to the heat generating body. Method for producing a heater, characterized in that it further comprises.
17. The method of claim 16,

    And the oxide film is removed by a polishing process.
18. The method of claim 17,

    In the oxide film removing step, the portion where the oxide film is removed on the heat generating body forms a groove on the heat generating body to form an accommodation portion in which the first or second electrical terminals are accommodated.

    And in the assembling step, the first or second electrical terminals are accommodated in the accommodation portion.
19. The method of claim 14,

    In the heat treatment step, the heating body is a heater manufacturing method characterized in that for about 5 to 15 minutes to heat the heating body at about 400 to 800 degrees Celsius.
20. The method of claim 14,

    In the raw material powder mixing step, the ceramic powder comprises alumina (Al ₂ O ₃ ) and silicon oxide (SiO ₂ ) manufacturing method of the heater, characterized in that.
21. The method of claim 20,

    In the raw material powder mixing step, the raw material powder comprises 60 to 95% by weight of the ceramic powder, the manufacturing method of the heater, characterized in that it comprises 5 to 40% by weight of the carbon conductor.
22. The method of claim 21,

    In the raw material powder mixing step, the ceramic powder and the carbon conductor is mixed and pulverized to form the raw material powder, characterized in that the heater.
23. The method of claim 14,

    The sintering step is a method of manufacturing a heater, characterized in that the progress in a vacuum or argon gas atmosphere.
24. The method of claim 23, wherein

    In the forming step, the raw material powder is added using a mold corresponding to the heat generating body to form the heat generating body.
25. A first heating body;

    A second heating body adjacent to the first heating body in a second direction perpendicular to the first direction;

    A third heating body adjacent to the second heating body in the second direction;

    A first portion extending in the first direction and in contact with the first heat generating body, a second portion extending in parallel with the first portion and disposed between the second heat generating body and the third heat generating body; A first electrode connecting a portion to the second portion and including a connecting portion extending in the second direction; And

    A first portion extending in the first direction and disposed between the first heating body and the second heating body, a second portion extending in parallel with the first portion and in contact with the third heating body, and the first portion; And a second electrode connecting a portion with the second portion and including a connecting portion extending in the second direction.
26. The method of claim 25,

    The first to third heating bodies are integrally formed from a mixture of ceramic and carbon conductor, the ceramic comprises a structural ceramic having no conductivity, and the carbon conductor comprises at least one of carbon, carbon nanotubes, and graphene. Heater comprising any one.
27. The method of claim 26,

    Each of the first to third heating bodies extends in the second direction and has a slit-shaped opening penetrating the first to third heating bodies in a third direction perpendicular to the first and second directions. Heaters, characterized in that formed.
28. The method of claim 26,

    A first electrical terminal in electrical connection with the first portion of the first electrode; And

    And a second electrical terminal in contact with the connecting portion of the second electrode.
29. The method of claim 28,

    And a overheat protection portion disposed between the first electrical terminal and the first portion of the first electrode.
30. The method of claim 29,

    The overheat prevention unit comprises a PTC element that is a barium carbonate-based switching element.
31. The method of claim 29,

    And a heat dissipation unit for dissipating heat generated by the overheat protection unit adjacent to the overheat protection unit.
32. The method of claim 28,

    A fourth heating body disposed adjacent to the third heating body in the second direction; And

    A first part in contact with the fourth heat generating body and extending in the first direction, and a third electrode connected to the first part and extending in the second direction and in contact with the extension part of the first electrode,

    And the second portion of the second electrode is disposed between the third heating body and the fourth heating body.
33. The method of claim 28,

    A fourth heat generating body adjacent to the first heat generating body in the first direction;

    A fifth heating body adjacent to the second heating body in the first direction;

    A sixth heating body adjacent to the third heating body in the first direction; And

    And a third electrical terminal electrically connected to the first heat generating body.
34. The method of claim 33, wherein

    A first portion extending in the first direction and in contact with the fourth heating body, a second portion extending in parallel with the first portion and disposed between the fifth heating body and the sixth heating body and the first portion; A third electrode connecting a portion to the second portion and including a connecting portion extending in the second direction; And

    A first portion extending in the first direction and disposed between the fourth heating body and the fifth heating body, a second portion extending in parallel with the first portion and in contact with the sixth heating body, and the first portion; And a fourth electrode connecting a portion with the second portion and including a connecting portion extending in the second direction.

    And the third electrode and the second electrical terminal are in contact with each other.
35. The method of claim 26,

    An overheat prevention rod electrically connected to the first portion of the first electrode; And

    A second electrical terminal in contact with the connection of the second electrode;

    The overheat protection rod includes a first electrical terminal, a cover surrounding the first electrical terminal, and a PTC element part, which is a barium carbonate-based switching element disposed between the cover and the first electrical terminal, wherein the portion of the first electrical terminal Heater, characterized in that exposed to the outside of the cover.
36. The method of claim 25,

    And a coupling member surrounding edges of the first to third heating bodies to fix the first to third heating bodies and the first and second electrical terminals.
37. The method of claim 36, wherein

    The coupling member includes a first coupling member, a second coupling member, a third coupling member and a fourth coupling member,

    The first coupling member is adjacent to the third heat generating body in the second direction to receive a portion of the third heat generating body,

    The second coupling member is adjacent to the first heat generating body in the second direction to receive a portion of the first heat generating body,

    The third coupling member is adjacent to the first to third heat generating bodies in the first direction, and accommodates a portion of the side surfaces of the first to third heat generating bodies,

    And the fourth coupling member is adjacent to the first to third heat generating bodies in the first direction and receives a portion of the side opposite to the side of the first to third heat generating bodies.
38. The method of claim 25,

    Heater, characterized in that the oxide film is formed on the surface of the first to third heat generating bodies.
39. The method of claim 25,

    And a conductive adhesive disposed between at least one of the two components adjacent to each other of the first to third heating bodies and the first and second electrodes to improve the bonding force of the respective components. heater.
40. A first heating body;

    A second heat generating body adjacent to the first heat generating body;

    A third heat generating body adjacent to the second heat generating body;

    A first electrode electrically connected to the first heat generating body and disposed between the second heat generating body and the third heat generating body;

    A second electrode electrically connected to the third heat generating body and disposed between the first heat generating body and the second heat generating body;

    A first electrical terminal electrically connected to the first electrode and to which an external power source is applied; And

    And a second electrical terminal electrically connected to the second electrode and to which external power is applied.
41. 41. The method of claim 40 wherein

    When the external power is applied, the first electrical terminal, the first electrode, the first heat generating body (or the second heat generating body or the third heat generating body), the second electrode, and the second electric terminal in the order A heater characterized by the flow of current (or vice versa).
42. 42. The method of claim 41 wherein

    And a overheat prevention unit including a PTC element disposed between the first electrical terminal and the first electrode.

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