KR102027457B1 - Electric Range with Self-Regulation Plane Multi Heating element - Google Patents

Electric Range with Self-Regulation Plane Multi Heating element Download PDF

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Publication number
KR102027457B1
KR102027457B1 KR1020130016036A KR20130016036A KR102027457B1 KR 102027457 B1 KR102027457 B1 KR 102027457B1 KR 1020130016036 A KR1020130016036 A KR 1020130016036A KR 20130016036 A KR20130016036 A KR 20130016036A KR 102027457 B1 KR102027457 B1 KR 102027457B1
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heating
heating element
temperature
heating elements
coated
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KR1020130016036A
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Korean (ko)
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KR20140102552A (en
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김병철
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부산대학교 산학협력단
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • H05B3/265—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base the insulating base being an inorganic material, e.g. ceramic
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/028—Heaters specially adapted for trays or plates to keep food or liquids hot

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Surface Heating Bodies (AREA)
  • Resistance Heating (AREA)

Abstract

The present invention relates to an electric range using a multi-temperature self-regulating planar heating element having a stability of temperature control by constructing the heating means of the electric range by coating a paste (SR) heating element in a paste form directly on the tempered glass. A plurality of SR heating elements which are directly coated on a lower surface of the tempered glass substrate and are separated from each other and have different heat generating temperatures during energization according to respective composition ratios; And a controller installed in the main body case to control a plurality of SR heating elements selectively having different heating temperature ranges.

Description

Electric Range with Self-Regulation Plane Multi Heating element

The present invention relates to an electric range, and in particular, the heating means is formed by coating an SR (Self Regulation) heating element in the form of a direct paste on tempered glass to increase the stability of temperature control in an electric range using a multi-temperature self-regulating planar heating element. It is about.

In general, the electric range is composed of a coil heating element using a metal material such as nichrome wire, tungsten, molybdenum, and the like in a predetermined area under the tempered glass.

However, when the heating element is in the form of a coil, there are many restrictions on the implementation of the structure of the heater product, and a lot of time is required to raise and lower the temperature, resulting in a problem in that the energy conversion efficiency is worse and power consumption is increased. And, due to the three-dimensional structure of the coil form, the product becomes bulky, heavy weight, and causes another problem that the consumption of the heat generating material increases.

In order to solve this problem, the thick film-type heating part was applied by applying a paste of nano-ceramic and metal materials on a glass substrate or stainless steel substrate in Korea Utility Model Publication No. 20-0399652 (registered October 19, 2005). The present invention discloses a hot plate having a thick film type heating element having excellent energy conversion efficiency and durability, and having a durable and compact structure and size by supplying electrical energy to the thick film type heating part and converting it into thermal energy.

However, the hot plate provided with the thick film-type heating element of the above-described registered utility model is not easy to precise temperature control, and even after rising to a constant boiling point temperature, there is a problem of excessive energy loss since it maintains the same power supply at the boiling temperature continuously. .

In addition, electric ranges including a hot plate having a conventional thick film-type heating element always generates the same area and the same temperature range regardless of the size of the container, so when heating a small container, unnecessary heating to the outer surface of the container consumes power. There is also a problem of wasting.

In order to solve this problem, the need for the development of a new heating element is required, a representative heating element that is newly attracting attention is a planar heating element.

With the depletion of energy resources, countries around the world are investing heavily in energy conservation. According to this trend, the planar heating element, which is recently emerging, is a product which reduces power by 20 to 40% than the electric heating element that is generally used, and is expected to have a large electric energy saving and economic ripple effect.

In general, the planar heating element uses radiant heat generated by the electric current, it is easy to control the temperature, and does not pollute the air has advantages in terms of hygiene and noise has been used for bedding, such as heating mats and pads. In addition, it is widely used for heating of floors of houses, industrial heating of offices and workplaces, heating devices in various industrial fields such as painting and drying, vinyl houses, barns, agricultural equipment, automobile back mirrors, freezing prevention devices for parking lots, cold protection equipment for leisure, home appliances, etc. It is used.

Planar heating elements have been widely used in recent years, replacing many parts of heating in Europe. In addition to the housing sector, cotton heating elements are new materials that can be applied to industrial dryers, agricultural product dryers, health care auxiliary products, and construction subsidiary materials. It is evaluated as a flagship product.

In general, the planar heating element mainly includes a metal heating element etched from a thin metal plate such as iron, nickel, chromium and platinum, and a nonmetal heating element such as silicon carbide, zirconia, and carbon. However, they have been pointed out that the heat and durability is weak and difficult to manufacture.

Multilayer heating elements in the form of layered products with conductive layers on both sides insulated with insulating layers are well known. It also has a heat reflecting layer of metal or metal polymer film on one side of the surface of the heating element. The conductive layer is made based on coal-fiber paper, and the insulating layers are known to be made of thermoplastic polymer film material.

In addition, methods for producing polymer electric heaters are also well known. At the time of manufacture, a conductive layer of element carbon, graphite, and modified phenol formaldehyde resin is formed to form a resistance element in such a manner as to permeate the insulating substrate together with the insulation. It is coated with an absorbent layer of epoxy or epoxyphenol or phenolformaldehyde binder to form an insulating coating and all layers are pressurized at the appropriate temperature, time and pressure.

The resistive element is separated together with similar resistive elements before application of a resistive coating thereon and in a separate form at 130-140 ° C. Heat-cure (cure) for 10-12 minutes per millimeter of lamination thickness.

However, the planar heating element of the prior art was not easy to precise temperature control, and the complexity of the process is a process of applying an insulator on the metal substrate and coating the heating element.

Therefore, there is a need for a technology that enables easy control of a specific temperature range while not only applying a specific electric power among the planar heating elements, but also using power efficiency.

In particular, the SR heating element of the prior art is manufactured by applying an insulator on a metal substrate and coating an SR heating element to make the process complicated, and since the heating temperature is controlled by a timer method using a bimetal or an electronic switch, efficient temperature control is possible. Is difficult.

Korea Utility Model Registration 20-0399652

The present invention is to solve the problem of the planar heating element of the prior art and the electric range using the same, by coating the SR (Self Regulation) heating element in the form of paste directly on the tempered glass to configure the heating means of the electric range to control the temperature An object of the present invention is to provide an electric range using a multi-temperature self-regulating planar heating element having improved stability.

The present invention is capable of precise temperature control in a specific temperature range, by applying an SR (Self-Regulation) heating element capable of self-control of power and temperature over time, it is possible to maintain a uniform temperature, significantly reducing the power consumption The purpose is to provide an electric range using a multi-temperature self-regulating planar heating element.

The present invention separates the SR (Self Regulation) heating element in the form of heat generation by coating on the tempered glass directly to the heating glass to configure the heating means to efficiently control the temperature, the SR (Self Regulation) heating element can be selected according to the heating target The purpose is to provide an electric range using a multi-temperature self-regulating planar heating element.

According to the present invention, an electric range using a multi-temperature self-regulating planar heating element capable of applying power by changing SR (Self Regulation) heating elements having different heating temperature ranges and changing the size of the applied power according to a heating target. The purpose is to provide.

The present invention is to coat the specific material with a mesh structure on the back surface of the tempered glass so that the heat dissipation characteristics of the coating area and the non-coating area are different from each other, the heat generation temperature is maintained only in the SR heating element region coated on the front surface of the tempered glass and other An object of the present invention is to provide an electric range using a multi-temperature self-regulating planar heating element which prevents heat from being transferred.

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

Electric range using a multi-temperature self-regulating planar heating element according to the present invention for achieving the above object is a main body case the upper surface is opened; Tempered glass substrate coupled to the upper body case; Directly to the lower surface of the tempered glass substrate A plurality of SR heating elements coated and separated from each other and having different heating temperature ranges when energizing according to respective composition ratios; a controller installed in the main body case to control a plurality of SR heating elements having different heating temperature ranges to be selectively driven; It is characterized by including.

Here, the plurality of SR heating elements having different heating temperature ranges are planar heating element compositions each having a different composition ratio are formed in a paste form and coated directly on the surface of the tempered glass substrate, and each of the SR heating elements is separated from each other to selectively supply power. It is characterized by being applied.

The shape of the region in which the plurality of SR heating elements having different heating temperature ranges is coated is selected from figures including a circle, a triangle, a rectangle, a pentagon, a hexagon, a lozenge, and a star, and the ways in which the SR heating elements are coated are spaced apart from each other. It is characterized in that it is any one or a variant or combination of the spiral, zigzag form to be separated.

And a back mesh coating layer on the back surface of the tempered glass substrate on which the plurality of SR heating elements having different heating temperature ranges are coated so that the heat dissipation characteristics of the coating area and the non-coating area are different from each other, and reinforced by the back mesh coating layer. The exothermic temperature is maintained only in the SR heating element region coated on the front of the glass, and the other region is characterized in that no heat is transmitted.

And the planar heating element composition constituting a plurality of SR heating elements having a different heating temperature range, 5 to 16% by weight of the insulating binder component, 50 to 75% by weight of the resistance component and 10 to 40% by weight of the temperature control component; Characterized in that the heat is generated at 300 ~ 700 ℃ in the energized state.

The controller controlling the plurality of SR heating elements having different heating temperature ranges to be selectively driven may apply a constant voltage without changing a voltage level to drive the SR heating elements.

In addition, the entire area of the region where the SR heating elements are coated is divided into a first inner region and an outer second region, and the first and second SR heating elements are spirally separated from each other and coated on the first region. The third and fourth SR heating elements are spirally separated from each other and coated to selectively apply power to the power supply terminals of the first, second, third and fourth SR heating elements to change the heating temperature range and the heating region size. It features.

The composition ratio of the planar heating element composition constituting the first, second, third and fourth SR heating elements is different, or the composition ratio is divided into the first and third SR heating elements and the second and fourth SR heating elements.

And a heat-resistant material plate is further provided on the upper portion of the tempered glass substrate coupled to the upper body case.

And a reflector for lowering the infrared rays emitted downward from the tempered glass substrate in the heat generating direction of the upper portion of the main body case.

Such an electric range using a multi-temperature self-regulating planar heating element according to the present invention has the following effects.

First, by coating the SR (Self Regulation) heating element in the form of a paste directly on the tempered glass can be configured to generate heat means to improve the stability of the temperature control.

Second, accurate temperature control is possible in a specific temperature range, and self-regulation (SR) heating element capable of self-control of power and temperature according to time can be applied to maintain uniform temperature and greatly reduce power consumption. .

Third, the SR (Self Regulation) heating element in the form of paste is separated by heating temperature and coated directly on the tempered glass to configure the heating means to select the SR (Self Regulation) heating element according to the heating target.

Fourth, by coating a specific material with a mesh structure on the back surface of the tempered glass, the exothermic temperature is maintained only in the SR heating element region coated on the front surface of the tempered glass, and the other region may not transmit heat, thereby increasing stability and convenience.

1 to 3 is a block diagram of a multi-temperature self-regulating planar heating element applied to the electric range according to the present invention
4A and 4B are waveform diagrams of voltage application for driving an electric range;
5 is a block diagram of an electric range using a multi-temperature self-regulating planar heating element according to the present invention
Figure 6 is a cross-sectional configuration of the electric range using a multi-temperature self-regulating planar heating element according to the present invention

Hereinafter, a preferred embodiment of an electric range using a multi-temperature self-regulating planar heating element according to the present invention will be described in detail.

Features and advantages of the electric range using a multi-temperature self-regulating planar heating element according to the present invention will be apparent from the detailed description of each embodiment below.

1 to 3 is a block diagram of a multi-temperature self-regulating planar heating element applied to the electric range according to the present invention.

The present invention coats the SR (Self Regulation) heating element in the form of a paste directly on the tempered glass to increase the stability of temperature control by configuring the heating means of the electric range, and selectively drive by combining the SR (Self Regulation) heating element for each heating temperature This allows the temperature control to be efficiently performed.

That is, a plurality of SR heating element compositions having different composition ratios are prepared in the form of a paste and directly coated on the surface of the tempered glass to configure the heating means of the electric range, and selectively apply power to the SR heating element according to the required heating temperature.

One example of a multi-temperature self-regulating planar heating element composition applied to the electric range according to the present invention is as follows.

The following composition ratios are shown as an example and are not limited to such composition ratios and materials, but may vary.

For example, 5 to 16% by weight of the insulating binder component, 50 to 75% by weight of the resistance component and 10 to 40% by weight of the temperature control component; composition comprising, up to 300 ~ in the state that the heating element formed using the composition is energized It is possible to construct a multi-temperature self-regulating planar heating element by directly coating the SR heating element composition is temperature controlled to 700 ℃ to the tempered glass substrate.

Here, the insulating binder component is preferably a polyester or epoxy material, and the resistance component is preferably a mixture of nickel and aluminum.

In addition, one or more calibration components selected from molybdenum (Mo), boron (B), and silicon (Si) may be further included to change the relative resistance value in the resistance component.

And the temperature control component is preferably at least one oxide selected from the group consisting of silicon oxide, aluminum oxide, boron oxide, barium oxide.

And the planar heating element composition is an organic solvent from alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, butanol, benzene, xylene, texanol, ethylene glycol, butyl carbitol, ethyl cellosolve, glycerol, dimethyl sulfoxide and the like. It can be used alone or in combination of two or more selected. In addition, aqueous (water) may be used as the solvent instead of the organic solvent.

In addition, the planar heating composition may further comprise a dispersant. The dispersant may use at least one selected from the group consisting of urethane, acrylic, phosphorus, organic acid salts and inorganic acid salts.

In addition, the planar heating composition may further comprise a thickener. At this time, the thickener is to increase the viscosity on the paste for the processability, such as coating properties in the manufacturing of the planar heating element, which is a crowd consisting of cellulose-based, polyacrylamide-based, polyurethane-based, polysaccharide-based and copolymers thereof You can use one or more selected from.

The present invention is to produce the SR heating element by directly coating the front surface of the tempered glass 10 as shown in FIG.

The composition ratio of the planar heating element composition is different so that the heating temperature range is changed when the power is applied.

Although FIG. 1A illustrates a multi-temperature self-regulating planar heating element using the first SR heating element 11a and the second SR heating element 11b having different heating temperatures, the SR heating element is further subdivided into two SRs. Of course, it is also possible to construct a multi-temperature self-regulating planar heating element using a larger number of SR heating elements rather than heating elements.

Here, each of the SR heating elements are different in the heating temperature, and are spaced apart from each other and coated on the tempered glass substrate 10.

The coated area and shape may be spirally coated separately from each other in the circular area as shown in FIG. 1A, and the shape of the coated area may be circular, triangular, rectangular, pentagonal, hexagonal, lozenge, or star shape. And the way in which the SR heating elements are coated is preferably any one of helical, zig-zag forms, or variations or combinations thereof, spaced apart from each other.

In particular, as shown in FIG. 2, the entire circular area is divided into an inner first area and an outer second area, and the first and second SR heating elements 21a and 21b are spirally separated from each other. Coating and second and third SR heating elements 22a and 22b are spirally separated from each other and coated to selectively apply power to respective power supply terminals a) and b). It is also possible to configure to drive by changing the heating temperature range and the heating region size.

Here, the composition ratios of the planar heating element compositions constituting the first, second, third and fourth SR heating elements 21a, 21b, 22a, and 22b may all be different, and the first and third SR heating elements 21a and 22a may be different. ) And the second and fourth SR heating elements 21b and 22b may have different composition ratios.

Such a coating form of the planar heating element composition as shown in Figure 2 is shown as an example, it is obvious that it can be carried out in other ways.

1B is an enlarged cross-sectional view taken along the line A-A 'of FIG. 1A, and the first SR heating element 11a and the second SR heating element 11b having different heating temperatures are separated from each other and coated separately.

As such, since the SR heating element is directly coated on the tempered glass substrate 10, the complexity of the process may be reduced compared to a method of coating an insulator on an existing metal substrate and coating the SR heating element.

In order to coat the SR heating element directly on the tempered glass substrate 10, it is also possible to coat the SR heating element after the sanding operation is performed on the surface of the tempered glass having high temperature resistance by a pretreatment process.

3 shows the back structure of the tempered glass substrate 10 constituting the multi-temperature self-regulating planar heating element according to the present invention.

SR coated on the front surface of the tempered glass by coating a specific material with a mesh structure on the back surface of the tempered glass substrate 10 to form a back mesh coating layer 12 so that the heat dissipation characteristics of the coating area and the non-coating area are different from each other. Exothermic temperature is maintained only in the heating element region and heat is not transferred to the other region.

The forming of the back surface mesh coating layer 12 on the back surface of the tempered glass substrate 10 is for efficient heat use, and the multi-temperature according to the present invention using the tempered glass substrate which does not form the back surface mesh coating layer 12. It is also possible to construct a self-regulating planar heating element.

In the electric range according to the present invention having a multi-temperature self-regulating planar heating element having such a structure, the voltage application waveform is the same as in FIG. 4b.

4A and 4B are waveform diagrams of voltage application for driving an electric range.

Existing electric ranges apply voltage as shown in FIG. 4A for temperature control, in which case energy efficiency is extremely lower than that of applying voltage as shown in FIG. 4B, and it is difficult to accurately control temperature.

Referring to the electric range according to the present invention having such a multi-temperature self-regulating planar heating element in detail as follows.

5 is a configuration diagram of an electric range using a multi-temperature self-regulating planar heating element according to the present invention, Figure 6 is a cross-sectional configuration of the electric range using a multi-temperature self-regulating planar heating element according to the present invention.

5 and 6, an electric range according to an embodiment of the present invention includes a body case 52, a heat resistant substrate 51 coupled to an upper surface of the body case 52, and the heat resistant substrate 51. A hot plate 50 made of an SR heating element 11 coated on the lower surface of the bottom surface and generating heat by electric energy supplied from the outside, and installed on the main body case 52 so that the user A controller 53 for controlling the operation of the SR heating element 11 of the plate 50 and a reflecting plate 54 for reflecting the infrared rays radiated in the bottom direction in the upper heating direction to the lower part of the main body case 52. .

Here, the SR heating element 11 has the configuration as shown in FIGS.

The main body case 52 is made of the same or similar configuration as the case configured in a conventional electric range made of a heat insulating material or made of a heat insulating material so that internal heat is not transmitted to the outside.

Although not shown in the figure, a means for the user to input a control signal to the controller 53 is further provided in the main body case 52.

The controller 40 includes a power supply device (not shown) connected to an external power source, and is independently connected to each of the SR heating elements 11 by electric wires, thereby providing electrical energy to each of the SR heating elements 11. By selectively supplying to control the exothermic temperature and the exothermic range.

The heat resistant substrate 21 of the hot plate 50 may be made of tempered glass, and a display line indicating a heat generating region may be displayed on a portion of the hot plate 50 corresponding to the SR heating elements 11.

In the above description, the heat resistant substrate 21 of the hot plate 50 may be used as a heat resistant substrate in which tempered glass itself is coated with a plurality of SR heating elements, as shown in FIGS. 1 to 3, and is reinforced with a plurality of SR heating elements coated thereon. Apart from glass, plates of other heat resistant materials may be used.

The electric range using a multi-temperature self-regulating planar heating element according to the present invention is coated with a SR (Self Regulation) heating element in the form of paste directly on the tempered glass to configure the heating means of the electric range to increase the stability of temperature control, SR (Self Regulation) The temperature control can be efficiently performed by selectively driving the heating elements by the heating temperature.

It will be understood that the present invention is implemented in a modified form without departing from the essential features of the present invention as described above.

Therefore, the described embodiments should be considered in descriptive sense only and not for purposes of limitation, and the scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope are included in the present invention. It should be interpreted.

10. Tempered Glass Substrate 11a. 1st SR heating element
11b. Second SR Heating Element 12. Back Mesh Coating Layer
50. Hot Plate 51. Heat Resistant Substrate
52. Main Unit Case 53. Controller
54. Reflector

Claims (10)

A main body case having an upper surface opened;
A tempered glass substrate coupled to the upper part of the main body case;
A plurality of SR heating elements which are directly coated on a lower surface of the tempered glass substrate and are separated from each other and have different heating temperature ranges when energizing according to respective composition ratios;
And a controller installed in the main body case to control a plurality of SR heating elements selectively having different heating temperature ranges.
The back surface of the tempered glass substrate coated with a plurality of SR heating elements having a different heating temperature range further includes a back mesh coating layer for different heat dissipation characteristics of the coating area and the non-coating area, and the tempered glass by the back mesh coating layer. Exothermic temperature is maintained only in the area of the SR heating element coated on the front side, and heat is not transferred to other areas.
The entire area of the region where the SR heating elements are coated is divided into a first inner region and an outer second region, and the first and second SR heating elements are spirally separated from each other and coated on the first region. 3,4 SR heating elements are spirally separated and coated to selectively apply power to the power supply terminals of each of the 1,2,3,4 SR heating elements to change the heating temperature range and the heating region size,
Multi-temperature characterized in that the heat generation temperature range at the time of energization is different for all of the 1,2,3,4 SR heating elements by varying the composition ratio of the planar heating element composition constituting the 1,2,3,4 SR heating element Electric range using self-regulating surface heating element. The method of claim 1, wherein the plurality of SR heating elements having a different heating temperature range,
The planar heating elements having different composition ratios are manufactured in the form of a paste and coated directly on the surface of the tempered glass substrate, and the SR heating elements are separated from each other, and power is selectively applied to the multi-temperature self-regulating planar heating elements. Electric range using. The method of claim 1, wherein the shape of the region in which the plurality of SR heating elements having different heating temperature ranges is coated is selected from figures including circular, triangular, rectangular, pentagonal, hexagonal, lozenge, and star shapes.
The SR heating elements are coated in an electric range using a multi-temperature self-regulating planar heating element, characterized in that any one of helical, zigzag form or a combination or a combination thereof are spaced apart from each other. delete The planar heating element composition of claim 1, wherein the planar heating element compositions configuring a plurality of SR heating elements having different heating temperature ranges are provided.
5 to 16% by weight of the insulating binder component, 50 to 75% by weight of the resistance component and 10 to 40% by weight of the temperature control component;
An electric range using a multi-temperature self-regulating planar heating element, characterized in that it generates heat at 300 ~ 700 ℃ in the energized state. The controller of claim 1, wherein the controller is configured to selectively drive the plurality of SR heating elements having different heating temperature ranges.
An electric range using a multi-temperature self-regulating planar heating element characterized by applying a constant voltage without changing the voltage level to drive the SR heating elements. delete delete The electric range using a multi-temperature self-regulating planar heating element of claim 1, wherein a plate of a heat resistant material is further provided on an upper portion of the tempered glass substrate coupled to the main body case. The electric range using a multi-temperature self-regulating planar heating element of claim 1, further comprising a reflector for reflecting infrared rays radiated downward from the tempered glass substrate in a heating direction of the upper part of the lower part of the main body case. .
KR1020130016036A 2013-02-14 2013-02-14 Electric Range with Self-Regulation Plane Multi Heating element KR102027457B1 (en)

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CN108401309A (en) * 2018-05-10 2018-08-14 东莞市可乐狗电子科技有限公司 A kind of multivoltage applicable thick film heat-generating disc
CN111902675A (en) * 2020-04-17 2020-11-06 余军勇 Heating stove

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KR200399652Y1 (en) 2005-08-04 2005-10-26 김종만 Hot plate having thick membrane type heating element
US8168926B2 (en) * 2007-03-26 2012-05-01 Ngk Insulators, Ltd. Heating device
KR101474767B1 (en) * 2009-02-25 2014-12-22 삼성전자 주식회사 Cooking apparatus
KR20120057016A (en) * 2010-11-26 2012-06-05 남상규 Material heater at the surface for cooking oven and making method there of
KR20120119074A (en) * 2011-04-20 2012-10-30 (주)피엔유에코에너지 Heater for steam generator with self-regulation plane heating element and method for manufacturing the same
KR20120119072A (en) * 2011-04-20 2012-10-30 (주)피엔유에코에너지 Electric range with self-regulation plane heating element and method for manufacturing the same

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