KR20140102552A

KR20140102552A - Electric Range with Self-Regulation Plane Multi Heating element

Info

Publication number: KR20140102552A
Application number: KR1020130016036A
Authority: KR
Inventors: 김병철
Original assignee: 부산대학교 산학협력단
Priority date: 2013-02-14
Filing date: 2013-02-14
Publication date: 2014-08-22
Also published as: KR102027457B1

Abstract

The present invention relates to an electric range using a multi-temperature self-regulating type surface heating element in which the heating means of the electric range is formed by coating a tempered glass with a SR (Self Regulation) heating element in the form of a paste directly, A plurality of SR heating elements directly coated on the lower surface of the tempered glass substrate and separated from each other and having different heating temperature ranges according to respective composition ratios; And a controller installed in the main body case for controlling the plurality of SR heating elements having different heating temperature ranges to be selectively driven.

Description

[0001] The present invention relates to an electric range with self-regulating planar heating elements,

The present invention relates to an electric range, and more particularly, to an electric range using a multi-temperature self-regulating type surface heating element which is formed by coating a tempered glass with an SR (Self Regulation) .

In general, an electric range is constructed by providing a coil-shaped heating element using a metal material such as nichrome wire, tungsten, molybdenum or the like on the lower side of the tempered glass in a predetermined area.

However, when the heating element is in the form of a coil, the structure of the electric heating device is limited in its implementation, and it takes a long time to raise and lower the temperature, resulting in a problem that the energy conversion efficiency is poor and the power is wasted. Further, due to the three-dimensional structure of the coil, the volume of the product is increased, the weight is increased, and the consumption of the heat generating material is increased.

In order to solve this problem, a paste in which a nano-grade ceramic and a metal material are mixed on a glass substrate or a stainless steel substrate is applied to the Korean Utility Model Registration No. 20-0399652 (registered on October 10, 2005) And a thick film heating element having an excellent energy conversion efficiency and durability and having durability and compact structure and size by supplying electrical energy to the thick film heating part and converting it into thermal energy.

However, the hot plate provided with the thick film heating element of the above-mentioned registered utility model is not easy to accurately control the temperature and maintains the same power supply to the boiling temperature continuously after rising to a constant boiling point temperature, .

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

In order to solve such a problem, there is a need for development of a new heating element, and a typical heating element attracting attention is an area heating element.

Due to the depletion of energy resources, countries around the world are investing heavily in energy conservation. In line with this trend, surface heating elements, which have recently been emphasized, are 20 ~ 40% less electric power than general electric heating elements, and it is expected that electric energy saving and economic ripple effects will be great.

Generally, the surface heating element utilizes the radiant heat generated by the electric power supply, and it is easy to control the temperature, does not pollute the air, has advantages in hygiene and noise, and has been used in bedding such as heating mat and pad. In addition, it is widely used in various industrial heating apparatuses such as floor heating, office and workplace heating of industrial house, painting drying, etc., plastic house, agricultural facility, automobile gray mulcher, freezing prevention of parking lot, leisure equipment for leisure, .

Especially, the surface heating element has been used recently to replace a lot of housing heating in Europe, and it is being exported not only to the domestic but also to the domestic market as new materials that can be applied to industrial dryer, agricultural product drier, It is evaluated as a product that can be focused on.

Generally, the surface heat generating element is mainly composed of a metal heating element obtained by etching a metal thin plate such as iron, nickel, chromium, or platinum, and a non-metallic heating element such as silicon carbide, zirconia or carbon. However, they have been pointed out that the heat and durability are weak and difficult to manufacture.

Multilayer heating elements in the form of layered products having conductive layers, both of which are 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. It is known that the conducting layer is fabricated on the basis of coal-fiber paper and the insulating layers are made of thermoplastic polymer film material.

Also, a method for producing a polymeric electrothermal heat is also well known. In the manufacturing process, a conductive layer made of carbon, graphite, modified phenol formaldehyde resin is coated to form a resistance element in such a manner that the insulating substrate is impregnated with an insulating material. A layer of the epoxy or epoxy phenol or phenol formaldehyde binder is applied over it to form an insulating coating and all layers are pressed at the appropriate temperature, time and pressure.

The resistive element is then separated with similar resistive elements prior to the resist coating thereon and separated in a separate form at 130-140 DEG C Heat treatment (curing) is performed for 10-12 minutes per 1 mm of lamination thickness.

However, the conventional surface heating element is not easy to accurately control the temperature, and the process is complicated because it is a process of applying an insulator on a metal substrate and coating a heating element.

Therefore, among the surface heating elements, it is required not only to apply a specific power, but also to make it easy to control a specific temperature range while improving the efficiency of power use.

Particularly, in the case of the conventional SR heating element, since the process is complicated by applying the insulator on the metal substrate and coating the SR heating element, and since the heating temperature is controlled by the timer method using the bimetal or the electronic switch, Is difficult.

Registered Utility Model No. 20-0399652

In order to solve the problems of the conventional surface heating element and the electric range using the same, the present invention is characterized in that a tempered glass is directly coated with an SR (Self Regulation) heating element in the form of paste to constitute a heating means for an electric range, And an object of the present invention is to provide an electric range using a multi-temperature self-regulating type surface heating element with enhanced stability.

The present invention can uniformly maintain the temperature by applying an SR (Self-Regulation) heating element capable of accurately controlling the temperature in a specific temperature range and capable of self-controlling power and temperature over time, The present invention provides an electric range using a multi-temperature self-regulating surface heating element.

In the present invention, a SR (Self Regulation) heating element in the form of a paste is separated for each heating temperature and directly coated on the tempered glass to constitute a heating means to efficiently control the temperature and to select an SR (Self Regulation) heating element depending on the heating object The present invention has been made in view of the above problems, and it is an object of the present invention to provide an electric range using a multi-temperature self-regulating surface heating element.

A self-regulating (SR) heating element having a plurality of self-regulating type surface heat emission elements, each of which is configured to apply a power source and change the size of an applied power source, The purpose is to provide.

In the present invention, a specific material is coated on the back surface of the tempered glass by a mesh structure so that the heat release characteristics of the coating region and the region other than the coating are different from each other, so that only the SR heating element region coated on the entire surface of the tempered glass maintains the heat generation temperature, And an object of the present invention is to provide an electric range using a multi-temperature self-regulating surface 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 not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an electric range using a multi-temperature self-regulating type surface heating element, comprising: a main body case having an upper surface opened; a tempered glass substrate coupled to the upper surface of the main body case; A plurality of SR heating elements which are coated and separated from each other and have different heating temperature ranges according to respective composition ratios, and a controller which is installed in the main body case and controls the plurality of SR heating elements having different heating temperature ranges to be selectively driven .

Here, the plurality of SR heating elements having different heating temperature ranges are respectively formed in the form of a paste and directly coated on the surface of the tempered glass substrate, and the respective SR heating elements are separated from each other, Is applied.

The shape of a region where the plurality of SR heating elements having different heating temperature ranges are selected from shapes including a circle, a triangle, a rectangle, a pentagon, a hexagon, a rhombus, and a star, A spiral shape or a jig jag shape which is separated or separated, or a modification or combination thereof.

And a backside mesh coating layer on the rear surface of the tempered glass substrate on which the plurality of SR heating elements having different heating temperature ranges are coated to differentiate heat release characteristics of the coating region and regions other than the coating, The heating temperature is maintained only in the region of the SR heating element coated on the entire surface of the glass, and heat is not transferred to the other areas.

The surface heating element compositions constituting the plurality of SR heating elements having different heating temperature ranges include 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, And heat is generated at 300 to 700 ° C in the energized state.

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

The entire area of the area where the SR heating elements are coated is divided into a first area inside and a second area outside, and the first and second SR heating elements are spirally separated from each other to coat the first area and the second area, The third and fourth SR heating elements are spirally separated from each other and coated, and power is selectively applied to the power supply terminals of the first, second, third and fourth SR heating elements to drive by varying the heating temperature range and the heating region size .

And the composition ratios of the surface heating element compositions constituting the first, second, third and fourth SR heating elements are different from each other, or the composition ratios of the first and third SR heating elements and the second and fourth SR heating elements are made different.

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

And a reflector for reflecting infrared rays radiated from the tempered glass substrate to the lower portion in a direction of an upper heating in a lower portion of the main body case.

The electric range using the multi-temperature self-regulating type surface heating element according to the present invention has the following effects.

First, SR (Self Regulation) heating element in the form of a paste is directly coated on the tempered glass to constitute a heating means, thereby enhancing the stability of temperature control.

Second, SR (Self-Regulation) heating element which can control the temperature accurately in a specific temperature range and can control the power and temperature with time can be applied to uniformly maintain the temperature and reduce power consumption significantly .

Third, a Self Regulation (SR) heating element in the form of a paste is separated for each heating temperature and directly coated on the tempered glass to constitute a heating means, and an SR (Self Regulation) heating element can be selected according to the heating object.

Fourth, a specific material is coated on the back surface of the tempered glass to improve the stability and convenience by keeping the exothermic temperature only in the SR heating element coated on the entire surface of the tempered glass and preventing heat from being transferred to other areas.

1 to 3 are diagrams showing a configuration of a multi-temperature self-regulating type surface heat emission element applied to an electric range according to the present invention
4A and 4B are voltage waveforms for driving the electric range
FIG. 5 is a diagram showing the configuration of an electric range using a multi-temperature self-regulating surface heating element according to the present invention
6 is a cross-sectional view of an electric oven using a multi-temperature self-regulating surface heating element according to the present invention

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

The characteristics and advantages of the electric range using the multi-temperature self-regulating type surface heating element according to the present invention will be apparent from the following detailed description of each embodiment.

1 to 3 are views showing a configuration of a multi-temperature self-regulating type surface heat emission element applied to an electric range according to the present invention.

In the present invention, SR (Self Regulation) heating elements are directly coated on the tempered glass to constitute heating means for an electric range to enhance the stability of temperature control, and SR (Self Regulation) heating elements are selectively driven So that temperature control can be performed efficiently.

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

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

The composition ratios shown below are examples, and it goes without saying that the composition ratios and materials are not limited to these compositions.

As an example, a composition comprising 5 to 16% by weight of an insulating binder component, 50 to 75% by weight of a resistive component and 10 to 40% by weight of a temperature control component, The SR heating element composition whose temperature is controlled to 700 ° C can be directly coated on the tempered glass substrate to constitute a multi-temperature self-regulating surface heating element.

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

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

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

The surface heating element composition may further contain, as an organic solvent, alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol and butanol, and organic solvents such as benzene, xylene, texanol, ethylene glycol, butyl carbitol, ethyl cellosolve, glycerol, These can be used singly or in combination of two or more. Further, in place of such an organic solvent, water (water) can be used as a solvent.

Further, the surface heating element composition may further include a dispersant. The dispersing agent may be at least one selected from the group consisting of urethane type, acrylic type, phosphorus type, organic acid type and inorganic acid type.

Further, the surface heating element composition may further contain a thickener. At this time, the thickening agent is used for the workability such as the coating property in the production of the surface heating element by increasing the viscosity on the paste, and it is preferable that the thickening agent is a mixture of cellulose, polyacrylamide, polyurethane, polysaccharide, May be used.

In the present invention, such an area heating element composition is manufactured in a paste form with different composition ratios and directly coated on the entire surface of the tempered glass 10 as shown in FIG. 1 to produce an SR heating element.

The reason why the composition ratios of the surface heating element compositions are different from each other is that the heating temperature range is changed when power is applied.

1A shows that the first SR heating element 11a and the second SR heating element 11b having different heat generating temperatures are used to constitute a multi-temperature self-regulating type surface heating element. However, the heating temperature section is further divided into two SR It is of course possible to construct a multi-temperature self-regulating surface heating element by using a larger number of SR heating elements instead of heating elements.

Here, each of the SR heating elements has a different heating temperature and is coated on the tempered glass substrate 10 at a distance from each other.

The area and shape to be coated may be spirally separated from each other in a circular area as shown in FIG. 1A, and the shape of the coated area may be circular, triangular, rectangular, pentagonal, hexagonal, rhombic, And the method in which the SR heating elements are coated is preferably a spiral shape or a zigzag shape in which they are separated from each other or a modification or combination thereof.

Particularly, as shown in FIG. 2, the first and second SR heating elements 21a and 21b are divided into a first area and a second area by spirally separating the entire first area and the second area from each other And the third and fourth SR heating elements 22a and 22b are spirally separated from each other and coated on the second area to selectively apply power to each of the power supply terminals A and B, It is also possible to configure the heating unit so as to be able to be driven by changing the heating temperature range and the heating region size.

Here, the composition ratios of the surface heating elements composing the first, second, third and fourth SR heating elements 21a, 21b, 22a and 22b may be different from each other, or the first and third SR heating elements 21a and 22a And the second and fourth SR heating elements 21b and 22b.

The coating type of the planar heating element composition as shown in FIG. 2 is one example, and it is obvious that the coating can be carried out in other ways.

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

As the SR heating element is coated directly on the tempered glass substrate 10 as described above, the complexity of the process can be reduced as compared with a method of applying the insulator on the existing metal substrate and coating the SR heating element.

In order to coat the SR heating element directly on the tempered glass substrate 10, the surface of the tempered glass having high temperature resistance may be coated with a SR heating element after a sanding operation by a pretreatment process.

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

A back surface mesh coating layer 12 is formed by coating a specific material on the back surface of the tempered glass substrate 10 with a mesh structure so that the heat release characteristics of the coating region and regions other than the coating are different from each other, So that the exothermic temperature is maintained only in the heating element region and heat is not transferred to the other regions.

The backside mesh coating layer 12 is formed on the back surface of the tempered glass substrate 10 so as to efficiently use heat. The backside mesh coating layer 12 is formed on the backside of the tempered glass substrate 10, It is also possible to construct a self-regulating type surface heat emission element.

The voltage applied waveform of the electric range according to the present invention having the multi-temperature self-regulating type surface heating element having such a structure is the same as in FIG. 4B.

4A and 4B are voltage waveforms for driving the electric range.

In the conventional electric range, the voltage is applied as shown in FIG. 4A for temperature control. In this case, the energy efficiency is extremely lower than that of the voltage application as shown in FIG. 4B, which makes accurate temperature control difficult.

The electric range according to the present invention having such a multi-temperature self-regulating surface heating element will be described in detail as follows.

FIG. 5 is a view illustrating a configuration of an electric range using a multi-temperature self-regulating type surface heating element according to the present invention, and FIG. 6 is a sectional configuration diagram of an electric range using a multi-temperature self- regulating type surface heating element according to the present invention.

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

Here, the SR heating element 11 has a configuration as shown in Figs. 1 to 3.

The body case 52 has the same or similar construction as that of a case formed of a conventional electric range, which is made of a heat insulating material or a heat insulating material so that the heat inside can not be transmitted to the outside.

Although not shown in the drawing, 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 has a power supply unit (not shown) connected to an external power supply. The controller 40 is connected to each of the SR heating elements 11 by electric wires to supply electric power to the SR heating elements 11 So that the heat generation temperature and the heat generation range are controlled.

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

In the above description, the heat-resistant substrate 21 of the hot plate 50 can be used as a heat-resistant substrate on which a plurality of SR heating elements are coated, as shown in FIGS. 1 to 3, Apart from glass, plates of other heat resistant material may also be used.

In the electric range using the multi-temperature self-regulating type surface heating element according to the present invention, SR (Self Regulation) heating element in the form of paste is directly coated on the tempered glass to constitute a heating means of the electric range, (Self Regulation) heating elements are combined according to a heating temperature and selectively driven, thereby enabling temperature control to be efficiently performed.

As described above, it will be understood that the present invention is implemented in a modified form without departing from the essential characteristics of the present invention.

It is therefore to be understood that the specified embodiments are to be considered in an illustrative rather than a restrictive sense and that the scope of the invention is indicated by the appended claims rather than by the foregoing description and that all such differences falling within the scope of equivalents thereof are intended to be embraced therein It should be interpreted.

10. Tempered glass substrate 11a. The first SR heating element
11b. The second SR heating element 12. The back mesh coating layer
50. Hot plate 51. Heat resistant substrate
52. Body case 53. Controller
54. Reflector

Claims

A main body case having an upper surface opened;
A tempered glass substrate coupled to the upper portion of the main body case;
A plurality of SR heating elements directly coated on a lower surface of the tempered glass substrate and separated from each other and having different heating temperature ranges according to respective composition ratios;
And a controller installed in the body case for controlling the plurality of SR heating elements having different heating temperature ranges to be selectively driven.

The method according to claim 1, wherein the plurality of SR heating elements having different heating temperature ranges,
Wherein the surface heating element compositions having different composition ratios are formed in the form of a paste and directly coated on the surface of the tempered glass substrate, and the respective SR heating elements are separated from each other to be selectively supplied with power. Electricity range using.

2. The method of claim 1, wherein the shape of the area coated with the plurality of SR heating elements having different heating temperature ranges is selected from shapes including circular, triangular, square, pentagonal, hexagonal, rhombic,
Wherein the method of coating the SR heating elements is a spiral shape or a zigzag shape separated from each other, or a modification or combination thereof, wherein the multi-temperature self-regulating type surface heating element is used.

The backlight unit of claim 1, further comprising a back side mesh coating layer on the rear surface of the tempered glass substrate on which a plurality of SR heating elements having different heating temperature ranges are coated,
Wherein the heating surface of the SR heating element is coated on the entire surface of the reinforced glass by the mesh coating layer so that heat is not transferred to the other areas of the SR heating element.

2. The surface heating element composition according to claim 1, wherein the surface heating element compositions constituting the plurality of SR heating elements having different heating temperature ranges,
5 to 16% by weight of an insulating binder component, 50 to 75% by weight of a resistive component and 10 to 40% by weight of a temperature control component,
And the heat is generated at 300 to 700 DEG C in the energized state.

The controller according to claim 1, wherein the controller controls the plurality of SR heating elements having different heating temperature ranges to be selectively driven,
Wherein the constant voltage is applied to the SR heating elements without fluctuating the voltage level.

The method as claimed in claim 1, wherein the entire area of the region where the SR heating elements are coated is divided into a first area inside and a second area outside,
The first and second SR heating elements are spirally separated from each other and coated, and the third and fourth SR heating elements are spirally separated from each other to coat the first and second SR heating elements, Wherein the power is applied to the power-on terminal, and the power is applied to the power-on terminal by varying the heating temperature range and the heating area size.

The method according to claim 7, wherein the composition ratios of the surface heating element compositions constituting the first, second, third and fourth SR heating elements are all different, or the composition ratios of the first and third SR heating elements and the second and fourth SR heating elements are different A multi-temperature self-regulating electric heater using a surface heating element.

The microwave oven according to claim 1, further comprising a plate of a heat-resistant material on an upper portion of the tempered glass substrate coupled to the upper portion of the main body case.

The microwave oven according to claim 1, further comprising a reflector for reflecting the infrared rays radiated downward from the tempered glass substrate to the lower portion of the main body case in the direction of the upper heating, .