WO2012144740A2

WO2012144740A2 - Electric range having self-regulating sheet-type heating element and manufacturing method for same

Info

Publication number: WO2012144740A2
Application number: PCT/KR2012/002121
Authority: WO
Inventors: 김병철
Original assignee: (주)피엔유에코에너지
Priority date: 2011-04-20
Filing date: 2012-03-23
Publication date: 2012-10-26
Also published as: KR20120119072A; WO2012144740A3

Abstract

The present invention relates to an electric range having a self-regulating sheet-type heating element, wherein the temperature can be accurately controlled within a particular temperature range and the power usage is reduced due to low heat loss. The electric range according to the present invention comprises: a case having an open top surface; a heat-resistant panel joined to the top surface of the case; a self-regulating heating element (SR heating element), which is connected underneath or disposed with a set distance from the heat-resistant panel, is formed from a hardened paste mixture of an electrical resistance material, an insulation binder and a temperature control material, generates heat with supplied power, and self-regulates the temperature so that the temperature is uniformly maintained within a defined range; a control part, disposed on the case, for allowing a user to control the temperature of the heat generated by the SR heating element; and a controller, connected to the control part, for controlling the temperature of the generated heat by controlling the power applied to the SR heating element.

Description

Electric Range with Temperature Self-regulating Planar Heating Element and Manufacturing Method Thereof

The present invention relates to an electric range, and more particularly, it is possible to precisely control the temperature in a specific temperature range, the temperature self-regulating type that can reduce the power consumption by adjusting the heating range according to the size of the cooking vessel (SR) : Self-Regulation) The present invention relates to an electric range using a planar heating element and a method of manufacturing the same.

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 is coated by applying a paste in which nano-grade ceramics and metal materials are mixed on a glass substrate or a stainless 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 regardless of the size of the container, so when heating a small container, unnecessary heating to the outer side of the container wastes power consumption. There is a problem.

The present invention was created to solve the above problems, an object of the present invention is to provide an accurate temperature control in a specific temperature range, self-regulation (SR) heating element capable of self-control of power and temperature over time It is possible to maintain a uniform temperature by applying, and to provide an electric range and a method of manufacturing the same that can significantly reduce the power consumption.

Another object of the present invention is to provide an electric range capable of adjusting the heating area according to the size of the container.

Electric range according to the present invention for achieving the above object, the upper surface is open case; A heat resistant substrate coupled to the upper surface of the case; Is disposed in contact with the lower portion of the heat-resistant substrate or spaced apart a predetermined distance, the paste is a mixture of the electrical resistance material component, the insulation binder component and the temperature control material component is cured to generate heat under the power supply, the temperature self-regulation function SR heating element (self-regulating heating element) to maintain a constant temperature of the predetermined region by performing; An operation unit installed in the case to allow a user to adjust the heating temperature of the SR heating element; It is connected to the operation unit characterized in that it comprises a controller for controlling the heating temperature by controlling the power applied to the SR heating element.

According to one aspect of the invention, the electrical resistance material component of the SR heating element is 50 to 75% by weight, the insulating binder component is 5 to 16% by weight, the temperature control material component is characterized in that 10 to 40% by weight. .

According to another category of the present invention, the method comprising the steps of preparing an SR heating element forming paste in which the electrical resistance material component, the insulation binder component and the temperature control material component are mixed; Applying the SR heating element-forming paste to a surface of a heat resistant substrate at a predetermined thickness; Provided is a method of manufacturing an electric range to which a temperature self-regulating planar heating element including the step of curing the SR heating element forming paste is provided.

According to another category of the present invention, the method comprising the steps of preparing an SR heating element forming paste in which the electrical resistance material component, the insulating binder component and the temperature control material component are mixed; Applying the SR heating element-forming paste to a surface of a heat resistant base plate at a predetermined thickness; Curing the paste for forming the SR heating element; Provided is a method of manufacturing an electric range using a temperature self-regulating planar heating element including a step of installing a heat resistant substrate and a base plate such that the SR heating element is attached to the surface of the heat resistant substrate or has a predetermined distance therebetween.

According to the present invention, since the temperature of the SR heating element of the hot plate is kept constant while controlling the heating state in response to the surrounding temperature environment, there is an advantage of reducing power consumption.

In addition, when the SR heating element is divided into a plurality of to generate power independently to generate heat, it is possible to change the heat generating area according to the size of the container, thereby preventing the waste of power consumption.

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

2 is a cross-sectional view illustrating main parts of the electric range of FIG. 1.

3 is an enlarged cross-sectional view illustrating a structure of an SR heating element configured in the electric range of FIG. 1.

Figure 4 is a graph showing the temperature control performance according to the embodiment and the comparative example of the SR heating element of the electric range according to an embodiment of the present invention.

Figure 5 shows the power test results of the SR heating element of the electric range according to an embodiment of the present invention.

Figure 6 shows the impedance test results of the SR heating element of the electric range according to an embodiment of the present invention.

Figure 7 shows the results of the temperature change of the SR heating element of the electric range according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the electric range and a manufacturing method according to the present invention.

1 and 2, an electric range according to an embodiment of the present invention includes a case 10, a heat resistant substrate 21 coupled to an upper surface of the case 10, and a heat resistant substrate 21. A hot plate 20 made of an SR heating element 22 which is applied to the lower surface and generates heat by electric energy supplied from the outside, and is installed in the case 10 so that a user may install the hot plate 20. The control unit 30 is configured to control the operation of the SR heating element 22 of, and the controller 40 is connected to the operation unit 30 to control the operation of the SR heating element 22. Here, the SR heating element 22 has a ring-shaped second heating element (22) formed at a predetermined interval apart from the center of the first heating element (22a) and the first heating element (22a) in order to enable a variable range of heat generation ( 22b), and is divided into a ring-shaped third heating element 22c formed to be spaced apart from the second heating element 22b by a predetermined interval.

The case 10 is made of the same or similar configuration as the case that is built in a conventional electric range made of a heat insulating material or made of a heat insulating material so that heat inside is not transmitted to the outside.

The operation unit 30 is a temperature control knob 31 for controlling the heating temperature of the first, second,

third heating elements

22a, 22b, 22c constituting the SR heating element 22, and the first, second, third A range adjusting knob 32 is provided to selectively control the heating or non-heating state of the

heating elements

22a, 22b, 22c to adjust the heating range. Of course, in this embodiment, the operation unit 30 is configured by a knob (knob) method to turn by hand, it can be configured in a variety of known methods, such as a button or a touch panel differently.

The controller 40 includes a power supply device (not shown) connected to an external power source, and includes a first heating element 22a and a second heating element 22b and a third heating element 22c and an electric wire of the SR heating element 22. Are independently connected to each other, and selectively supply electric energy to the first, second and

third heating elements

22a, 22b and 22c of the SR heating element 22 through the power supply device according to the operation of the operation unit 30. The heat generation temperature and heat generation range of the 1,2,3

heating elements

22a, 22b, 22c are controlled. That is, when the user wants to heat the small container SC, the range adjusting knob 32 of the operation unit 30 is set to the first position, and the temperature adjusting knob 31 is operated to operate the first heating element 22a. When the temperature is generated, the second and

third heating elements

22b and 22c do not generate heat, and electrical energy is supplied only to the first heating element 22a through the controller 40, and the first heating element 22a is set in a temperature range. The vessel SC is heated while maintaining. In addition, when the user wants to heat the large container BC using all of the first, second and

third heating elements

22a, 22b and 22c, the range adjusting knob 32 is set to the third position and the temperature adjusting knob 31 is used. The heat generating temperature is set, the electrical energy is supplied to all of the first, second, and

third heating elements

22a, 22b, and 22c through the controller 40, and the first, second, and

third heating elements

22a, 22b, and 22c are supplied. Generates heat while maintaining the set temperature.

The heat resistant substrate 21 of the hot plate 20 may be configured using a metal such as ceramic, tempered glass, stainless steel, or the like. On the surface of the heat resistant substrate 21, a display line indicating a heat generating region may be displayed on a portion corresponding to the SR heat generator 22.

The SR heating element 22 receives heat from the power supply device of the controller 40 to generate heat. Such SR heating element 22 is to perform a temperature self-regulation function, so that the temperature is kept constant in the set temperature range while adjusting the heating state in response to the ambient temperature environment. That is, the SR heating element 22 continuously maintains the set temperature of the predetermined region temperature around the SR heating element 22, such that the predetermined region temperature around the SR heating element 22 is lower than a temperature value set due to external influence or the like. When the heat is generated at a high temperature, the predetermined area temperature around the SR heating element 22 quickly reaches the set temperature, and when the predetermined area temperature around the SR heating element 22 becomes high, the predetermined area around the SR heating element 22 is turned off. Allow the temperature to lower. In addition, the heat generating state of the SR heating element 22 is adjusted according to the difference between the predetermined region temperature around the SR heating element 22 and the set temperature, and as the difference between the predetermined region temperature and the set temperature around the SR heating element 22 increases, the temperature is increased. It has the ability to generate heat and allow rapid temperature rise.

The self-regulation function of the SR heating element 22 is a film or coating film of a predetermined thickness made by curing a paste in which an electric resistance material component, an insulation binder component, and a temperature control material component are mixed. Is implemented by The SR heating element 22 may be directly attached or applied to the lower surface of the heat resistant substrate 21, but may be attached to the lower portion of the heat resistant substrate 21 after being applied on a heat resistant base plate such as metal or at a predetermined distance. It may be installed spaced apart.

In addition, in this embodiment, the SR heating element 22 is divided into three parts, that is, the first heating element 22a, the second heating element, and the third heating element 22c, each of which is independently connected to the controller 40. Power supply, but may alternatively be composed of a single body or divided into two or more parts separated from each other.

Referring to FIG. 3, a conduction path 23 is formed on a surface of the SR heating element 22, and a power line 41 of a power supply device of the controller 40 is located in the conduction path 23. Then, the SR heating element 22 receives the power through the conductive path 23 to generate heat in the range of approximately 50 ~ 450 ℃.

As described above, the SR heating element 22 is formed by hardening a paste in which an electric resistance material component, an insulating binder component, and a control material component are mixed. Such SR heating element 22 may be formed by coating by screen print. Here, the SR heating element 22 may be heat-treated in a conveyor furnace that emits infrared rays for 8 to 12 minutes at 130 to 160 ° C., and then heat-treated at 180 ° C. for 20 minutes. In addition, the conductive path 23 is formed on the surface of the SR heating element 22 so that the power line 41 of the power supply device of the controller 40 is positioned in the conductive path 23 to receive power and generate heat.

On the other hand, SR heating element 22 according to an embodiment of the present invention is configured to have 50 to 75% by weight of the electrical resistance material component, 5 to 16% by weight of the insulating binder component, 10 to 40% by weight of the temperature control material component do.

When the content of the electrical resistance material component is less than 50% by weight is not preferable to realize the heat generating performance of the heating element, when it exceeds 75% by weight is not preferable because the stability of the temperature control is lowered. In addition, when the content of the insulating binder component is less than 5% by weight, it is not preferable because the bonding strength of the composition is lowered. When the content of the insulating binder component is more than 16% by weight, the component content of other compositions such as the resistance component is low, so that the exothermic performance is lowered. I can't. In addition, when the content of the temperature control material component is less than 10% by weight, it is not desirable to be insufficient to realize the function of adjusting to a specific temperature, and when the content of the temperature control material exceeds 40% by weight, the content of other components such as the resistance component is too small. Not preferred.

Here, the SR heating element 22 according to the embodiment of the present invention forms a paste in a powder mixture state in which the electrical resistance material component includes nickel (Ni) and aluminum (Al). The electrical resistivity component is composed of nickel 50 to 60% by weight of the electrical resistance material component, aluminum 40 to 50% by weight of the electrical resistive material component, nickel 53% by weight of the electrical resistive material component, aluminum It is preferably configured to have 47% by weight of this electrical resistive substance component.

In addition, the electrical resistance material component of the SR heating element 22 may include molybdenum (Mo), boron (B), silicon (Si), and the like as corrective ingredients. Here, the molybdenum is 0.05 to 0.2 at% of the paste, the boron is to be composed of 0.005 to 0.02 at% of the paste, the molybdenum is preferably composed of 0.1 at% of the paste, the boron is composed of 0.01 at% of the paste.

The electrical resistive substance is added to nickel and aluminum by adding corrective ingredients such as molybdenum (Mo), boron (B), and silicon (Si) for 4 to 12 hours (preferably 6- 10 hours) in a closed space of a planetary ball mill. Herein, the dispersion value between particles constituting the electric resistance material component of the SR heating element 22 is formed in a range of 0.1 to 10 μm, more preferably, the dispersion value between particles in a range of 0.5 to 5 μm. To form. In addition, the specific surface area is preferably 200 m 2 / g or less. The dispersion value between the particles constituting the electrical resistance material component is linked to the temperature coefficient of resistance (TCR) of the SR heating element 22, and the resistance temperature coefficient of the SR heating element 22 is the electrical resistance material component. It is controlled by the dispersion value between particles. Here, the dispersion value between the particles constituting the electrical resistance material component is controlled by the time the electrical resistance material component stays in the closed space of the planetary ball mill.

In addition, the insulating binder component of the SR heating element 22 may be selected from a polyester, an epoxy resin, an epoxy-phenol lacquer composition, and the like. When the insulating binder component is composed of 10 to 16% by weight of the paste, nanostructured silicon (Si) powder, which is a stabilizing additive, may be added to the insulating binder component. Here, such silicon may be composed of 0.3 to 0.7 at% of the paste, preferably 0.4 to 0.6 at%. Such silicon shortens the formation time of the structure of the SR heating element 22 when manufacturing the SR heating element 22, and allows the resistance temperature coefficient of the SR heating element 22 that is set and implemented to be maintained for a long time.

In addition, the SR heating element 22 serves to adjust to about 50 ~ 450 ℃ in the energized state through the temperature control material component. As such, a specific material must be included as an appropriate temperature control material component to prevent overheating of the heating element and to contribute to the proper power consumption. The temperature control material of the SR heating element 22 forms a paste in a lead-free-glass powder mixture. The glass powder mixture is formed from a group consisting of SiO₂, BaO, B₂O₃, and Al₂O₃. It is preferred that it is at least one oxide selected.

Here, the temperature control material component of the SR heating element 22 may be manufactured in a closed space of a planetary ball mill for 4-12 hours (preferably 6-10 hours) without oxygen inflow. On the other hand, the temperature control material component of the SR heating element 22 is such that the dispersion (dispersion) value between particles is formed in the range of 0.05 to 2㎛, preferably to form the dispersion value between particles in the range of 0.1 to 1.0㎛ . The dispersion value between particles constituting the thermostat component is controlled by the time that the thermostat component stays in the closed space of the planetary ball mill.

As the temperature control material component of the SR heating element 22, a corrective ingredient including ZnO, Al, TiO₂, Bi₂O₃BaTiO, etc. may be added. (discretisation) can be formed in the range of 0.05 to 0.4 μm, preferably to be formed in the range of 0.1 to 0.3 μm. In addition, the temperature control material component of the SR heating element 22 has a mixture including niobium (Nb), antimony (Sb), yttrium (Y), lanthanum (La), and the like as a donor. Such donors are added to obtain high volume conductivity.

SR heating element 22 according to an embodiment of the present invention configured as described above has a resistance value of 0.05 to 1.9 Ω / □ (preferably 0.09 to 0.9 Ω / □), SR according to an embodiment of the present invention The heating element 22 changes the resistance value of the SR heating element 22 by adjusting the weight ratio of the electrical resistance material component, the insulation binder component, and the temperature control material component.

In addition, the SR heating element 22 according to the embodiment of the present invention configured as described above is a resistance thermometer of 500 to 50 × 10 ^-4 / ℃ (preferably 560 × 10 ^-6 to 40 × 10 ^-4 / ℃) It has a number (TCR), the SR heating element 22 according to the embodiment of the present invention changes the resistance temperature coefficient of the SR heating element 22 by adjusting the weight ratio of the electrical resistance material component, insulating binder component, temperature control material component Let's go.

In order to examine the performance of the SR heating element (22) made up of components such as the epoxy resin 7g, nickel-aluminum (Ni-53%, Al- 47%) 70g, SiO 2 -BaO-B 2 O 3 -Al 23 g of ₂ O ₃ was dispersed in 200 g of ethanol, premixed and stirred at high speed to prepare SR heating element 22 (Example 1) of the present invention, and 20 g of epoxy phenol lacquer resin, NiAl [(Ni-53%, Al 60g of -47%) (45wt%)]-B (5wt%)-Mo (30wt%)-Si (20wt%) was dispersed in 200g of ethanol, premixed and stirred at high speed to prepare the planar heating element of Comparative Example 1. Next, a power test, an impedance, and a temperature control test were performed for Example 1 and Comparative Example 1, and the results are shown in FIGS. 4 to 7.

First, Figure 4 is a graph showing the temperature control performance according to Example 1 and Comparative Example 1, line 1 shows a temperature increase curve according to Comparative Example 1, line 2 of the SR heating element 22 according to the present invention It is shown that the temperature increase, the SR heating element 22 (Example 1) of the present invention can be seen that the resistance value increases rapidly when the temperature is above a certain value.

In addition, referring to the power test results, the impedance test results, and the temperature change test results shown in FIGS. 5 to 7, the temperature is similarly increased in Example 1 and Comparative Example 1. FIG. However, in Example 1, the resistance value (impedance) increases with time, and thus the power usage decreases. In Comparative Example 1, the impedance is almost constant and the power consumption is almost constant. Therefore, the SR heating element 22 of the present invention can increase the resistance value with time to reduce the power consumption, and the power and temperature self-regulation with time due to the increase in the resistance value (material characteristics). You can see that this is possible.

As described above, in the electric range of the present invention, since the SR heating element 22 maintains a constant temperature while controlling the heat generation state in response to an ambient temperature environment, there is an advantage of reducing power consumption.

In addition, when the SR heating element 22 is divided into a plurality and configured to independently generate power to generate heat, the heat generating area may be changed according to the size of the container, thereby preventing the waste of power consumption.

The embodiments of the above-described electric range according to the present invention are presented for illustrative purposes only to help understanding of the present invention, and the present invention is not limited thereto, and those skilled in the art to which the present invention pertains have attached patents. Various changes and implementations may be made within the scope of the technical idea described in the claims.

The present invention can be usefully applied to a cooking appliance for cooking food by heating of a heating element such as an electric range.

Claims

A case 10 having an upper surface open;

A heat resistant substrate 21 coupled to the upper surface of the case;

Is disposed in contact with the lower portion of the heat-resistant substrate or spaced apart a predetermined distance, the paste is a mixture of the electrical resistance material component, the insulation binder component and the temperature control material component is cured to generate heat under the power supply, the temperature self-regulation function An SR heating element (22) for maintaining a constant temperature in the predetermined region by performing a;

An operation unit 30 installed in the case to allow a user to adjust the heating temperature of the SR heating element;

And a controller (40) connected to the operation unit for controlling power applied to the SR heating element to control the heating temperature.
The electric range of claim 1, wherein the SR heating element is directly applied or attached to a lower surface of the heat resistant substrate.
The temperature self-regulating type according to claim 1, wherein the SR heating element is attached to the lower surface of the heat resistant substrate 21 in a state where it is applied or attached to the upper surface of the heat resistant base plate or spaced a predetermined distance apart. Electric range with planar heating element.
According to claim 1, wherein the SR heating element is divided into a plurality, each of the divided parts are connected to the controller individually through a wire is applied to the power controlled independently, characterized in that by applying a temperature self-regulating planar heating element Electric range.
The method of claim 4, wherein the operation unit comprises a range adjusting unit for selectively controlling the heat generation or non-heating of the divided parts of the SR heating element, and a temperature control unit for controlling the heating temperature of the SR heating element Electric range with temperature self-regulating planar heating element.
According to claim 1, wherein the SR heating element has a conduction path (conduction path) is formed on the surface, the power line of the controller 40 is located in the conduction path is characterized in that the heat generated by conducting power from the controller Electric range with self-regulating planar heating element.
According to claim 1, wherein the electrical resistance material component of the SR heating element is 50 to 75% by weight, the insulating binder component is 5 to 16% by weight, the temperature control material component, characterized in that 10 to 40% by weight Electric range with adjustable planar heating element.
8. The thermogravimetric element according to claim 1, wherein the electrical resistance material component of the SR heating element forms the paste in the form of a powder mixture containing nickel (Ni) and aluminum (Al). Electric range with adjustable planar heating element.
The method of claim 8, wherein the nickel is 50 to 60% by weight of the electrical resistance material component, the aluminum is 40 to 50% by weight of the electrical resistance material component of the electric heat applied to the self-regulating planar heating element range.
The method of claim 8, wherein the electric resistance material component of the SR heating element further comprises a corrective ingredient (corrective ingredients) selected from one or more of the group of molybdenum (Mo), boron (B), silicon (Si). Electric range with self-regulating surface heating element.
The electric range of claim 10, wherein the molybdenum is 0.05 to 0.2 at% of the paste, and the boron is 0.005 to 0.02 at% of the paste.
8. The dispersion coefficient between particles constituting the electrical resistance material component of the SR heating element is 0.1 to 10 μm, and the resistance temperature coefficient (TCR: temperature coefficient) of the SR heating element is according to claim 1. of resistance) is an electric range to which the temperature self-regulating planar heating element is controlled by the dispersion value between particles constituting the electrical resistance material component.
The method of claim 1, wherein the insulating binder component of the SR heating element is made of any one selected from the group consisting of polyester (polyester), epoxy (epoxy) resin, epoxy-phenol lacquer composition (epoxy phenol laquer) composition An electric range to which the temperature self-regulating planar heating element is applied.
According to any one of claims 1 to 7, wherein the insulating binder component of the SR heating element is 10 to 16% by weight,

The insulation binder component of the SR heating element is an electric range to which a temperature self-regulating planar heating element further comprises a nanostructured silicon (Si) powder as a stabilizing additive.
15. The electric range according to claim 14, wherein the silicon is 0.3 to 0.7 at% of the paste.
8. The temperature self-regulation of claim 1, wherein the modulator component of the SR heating element forms the paste in the form of a lead-free-glass powder mixture. 9. Electric range with type planar heating element.
17. The electric range according to claim 16, wherein the glass powder mixture comprises SiO 2, BaO, B 2 O 3, and Al 2 O 3.
8. The electric range according to any one of claims 1 to 7, wherein a dispersion value between particles constituting the modulator component of the SR heating element is 0.05 to 2 µm. .
The method of claim 1, wherein the modulator component of the SR heating element further comprises a corrective ingredient (corrective ingredients) selected from one or more of the group ZnO, Al, TiO₂, Bi₂O₃BaTiO. Electric range with self-regulating surface heating element.
20. The electric range to which the temperature self-regulating planar heating element according to claim 19 is characterized in that the discreteness of particles constituting the calibration component is 0.05 to 0.4 µm.
The mixture of any one of claims 1 to 7, wherein the modulator component of the SR heating element is one or more selected from the group of niobium (Nb), antimony (Sb), yttrium (Y), and lanthanum (La). An electric range to which the temperature self-regulating planar heating element is to be included as a donor.
According to any one of claims 1 to 7, wherein the resistance value of the SR heating element is 0.05 to 1.0 1.0 / □,

An electric range to which the temperature self-regulating planar heating element is characterized in that the resistance value of the SR heating element is changed by adjusting the weight ratio of the electric resistance material component, the insulating binder component, and the adjusting material component constituting the SR heating element.
According to any one of claims 1 to 7, wherein the resistance temperature coefficient of the SR heating element is 500 × 10 -6 to 50 × 10 -4 / ℃,

The temperature range of the SR self-heating type electric heating element characterized in that the resistance temperature coefficient of the SR heating element is changed by adjusting the weight ratio of the electric resistance material component, the insulation binder component, the control material component constituting the SR heating element.
Preparing an SR heating element-forming paste in which an electric resistance material component, an insulation binder component, and a temperature control material component are mixed;

Applying the SR heating element-forming paste to a surface of a heat resistant substrate at a predetermined thickness;

Method of manufacturing an electric range to which the temperature self-regulating planar heating element comprising the step of curing the SR heating element forming paste.
Preparing an SR heating element-forming paste in which an electric resistance material component, an insulation binder component, and a temperature control material component are mixed;

Applying the SR heating element-forming paste to a surface of a heat resistant base plate at a predetermined thickness;

Curing the paste for forming the SR heating element;

And installing a heat resistant substrate and a base plate such that the SR heating element is attached to the surface of the heat resistant substrate or has a predetermined distance therebetween.
The method according to claim 24 or 25, wherein the SR heating element paste is applied to a surface of a heat resistant substrate or a heat resistant base plate by a screen print method. .
The method of claim 24 or 25, wherein the electrical resistance material component is added to the nickel, aluminum, molybdenum (Mo), boron (B), silicon (Si), etc. by adding a corrective ingredients (corrective ingredients), 4 ~ without oxygen inflow 12. A method of manufacturing an electric range using a temperature self-regulating planar heating element, which is produced in a closed space of a planetary ball mill for 12 hours.