KR101539957B1 - Electromagnetic shielding type induction cooker - Google Patents

Abstract

The present invention relates to an electromagnetic shielding type induction cooker, especially wherein a main body and a frame for fixing the main body which includes an upper plate connected detachably to an upper surface of the main body are integrally injection molded by using a heat resistance complex resin material with an electromagnetic shielding material having an electromagnetic shielding and a heat radiation function. A supporting member seating groove having particular depth and area is formed on an upper surface of the upper plate where a working coil is positioned, and a cooker supporting member, molded with a nontoxic, heat resistant, and elastic material, such as a silicon, a rubber, or a Teflon, is formed detachably on the supporting member seating groove. Accordingly, a damage to a human body due to an electromagnetic wave and a failure of an electric/electronic device can be perfectly prevented, and a post processing, such as processing an edge, is not needed. Also a usage of some components can be excluded, thereby reducing production costs of a product. An assembly and a disassembly of the upper plate are convenient, thereby easily cleaning the same, and a damage due to an external impact can be prevented, thereby significantly extending a life span.

Description

[0001] Electromagnetic shielding type induction cooker [0002]

[0001] The present invention relates to an electromagnetic wave shielding induction cooker, and more particularly, to an induction cooker for induction heating which is manufactured by a heating device for cooking so as to perform various cooking by applying an induction heating principle, It is not made of glass or melamine resin but it is molded into a heat-resistant composite resin material with electromagnetic shielding (EMI) shielding function and heat-dissipating function, so as to prevent scratches and the like, It is easy to assemble and disassemble the top plate and can be easily cleaned, and the production cost of the top plate itself can be reduced by eliminating the heat-resistant tempered glass, the injection frame and the silicone adhesive, It is possible to reduce the energy by increasing the heat conversion efficiency by the heat of the glass, The temperature sensor may be printed at a position spaced a predetermined distance away from the container. Alternatively, a thermosensitive resin may be attached to accurately identify an overheated state. A permanent magnet may be attached to one side of the upper plate to form a container suitable for the induction cooker And the temperature sensor is installed to be in direct contact with the bottom surface of the container through the upper plate in a resilient manner so as to improve the reliability of the temperature control during cooking and to secure safety against abnormal overheating, Which is expected to be caused by the inflow of the food liquid into the circuit board due to the contact between the container and the induction cooker, can be prevented, and a support member formed of silicone, rubber, or Teflon can be detachably attached to the container, It is possible to minimize the resonance noise that has occurred between the support member It is possible to increase a visual effect to the design change, and the main body is also the invention allows to significantly reduce the fan's noise can reduce the size of the fan and forming a heat-resistant resin composite material having electromagnetic wave shielding function and a heat radiating property.

Generally, an induction cooker or an induction range, which is an induction heating cooker, generates magnetic lines of force when a high frequency current is applied to a working coil, generates a large number of eddy currents at the center of the magnetic force lines, Is heated by induction heating so that various kinds of food contained in the container or the heating plate are heated and cooked by heating the cooking vessel or the heated plate by induction heating.

That is, an induction range is a device in which a container made of an electric induction material (such as steel, iron, nickel, or various kinds of alloys) is heated using residual (magnetic) energy generated by an electric current, When a current is supplied, a magnetic force line is generated in the coil. When the magnetic force line passes through the bottom of the cooking vessel placed on the upper plate, an eddy current is generated by the resistance component (i.e., iron component) included in the material of the cooking vessel, The top plate of the cooking range is heated and induction heating is performed so that only the cooking vessel is heated without being heated, and various kinds of cooking materials contained in the cooking vessel are heated and cooked.

Such an induction range has no danger of fire because it does not generate flame or harmful gas due to incomplete combustion, and it does not generate carbon monoxide which is inevitably generated when gas is used as a heat source, There is a maintainable feature.

In addition, such an induction range has a tendency to be used in recent years because it has the advantage that there is no risk of burning even when the grill touches the grill while heating the container, and there is no danger of fire and explosion because there is no flame.

On the other hand, most of the conventional induction cooker upper plates are formed by attaching heat-resistant tempered glass to the upper surface of the upper cover which is formed by injection molding in the form of a rectangular frame. When the upper plate is installed with the heat-resistant tempered glass, However, after the heat-resistant tempered glass having a predetermined thickness is cut to a desired area, it is necessary to perform post-processing such as curving processing for the corner portion, thereby increasing the labor cost and the manufacturing cost, causing many scratches on the surface of the glass during long- There is a problem that a large amount of resonance noise occurs at the contact portion between the upper plate and the container.

In addition, since there is no slip prevention function, the container slips on the upper plate during cooking, and when there is soup or water on the upper surface, the bottom surface of the container having a flat shape is attached due to the surface tension, There is a risk that a safety accident such as an image may be caused by pouring the contents heated at a high temperature in the process of forcibly lifting the container as well as the lifetime of the top plate is shorter than various component parts installed in the main body.

In addition, there is a risk that the heat generated in the container being cooked is conducted to the heat-resistant tempered glass, and the heat is transmitted to the components located at the lower part of the upper plate in the main body. To prevent this, So that unnecessary fan noise is generated.

In some conventional induction cookers, melamine resin, which is a thermosetting resin produced by reacting melamine with formaldehyde as a top plate, is integrally formed with the top cover. This melamine resin is strong against heat, acids and solvents, It is not only expensive but also less expensive than heat-resistant tempered glass. However, it has problems such as discoloration or fading due to curing due to high temperature during long use, Problems such as a short life time, a slip of the container, a noise of a fan, and the like are present in the heat-resistant tempered glass. In addition, there is a problem that an environmental hormone is generated at the time of heating or disposal.

In addition, there is a constitution in which a ceramic top plate having a shape obtained by processing and molding a base metal or an inorganic material at a high temperature with a top plate of a conventional induction cooker is fixed to the top surface of a top cover having a square frame shape. The heat resistance and abrasion resistance are superior to those of the above two materials. However, the cost of the raw material itself is high as well as the cost of processing and molding, and thus the cost of the product itself is greatly increased. (For example, the container slips and the fan noise is generated).

On the other hand, electromagnetic waves are divided into high frequency waves emitted from mobile phones, radar, TV, microwave oven, etc., and low frequency waves emitted from electric products, transmission lines, substations and the like. Commonly known social problems of electromagnetic wave interference include health problems, electromagnetic wave malfunctions, There is

Here, in the case of health disturbance, the high frequency is apt to be absorbed by the human body, causing a resonance phenomenon depending on the size and the structure of the human body, resulting in a hot-spot effect. The low frequency has a high permeability to the human body, and there is a concern about the carcinogenicity due to the magnetic field.

It is now considered unnecessary to prohibit the use of mobile phones in hospitals or airplanes due to the problem that electromagnetic waves emitted from electric / electronic devices cause malfunctions to other devices due to the malfunction of electromagnetic wave malfunctions. This is because it is likely to cause serious accidents.

In the case of a perspective problem, it is often pointed out that it is also possible to acquire information by catching an electromagnetic wave leaking from a computer or an in-house LAN.

These electromagnetic disturbances are manifested in a variety of ways, from malfunctions of computers to accident of factories in factories, and furthermore, as the result of research that electromagnetic waves have a negative effect on the human body has been announced successively, concern and concern about health have been increasing. It is a fact that we are trying to strengthen regulations on electromagnetic interference and prepare countermeasures.

On the other hand, in the induction cooker, many electromagnetic waves are generated when a high current flows in the working coil. Most of the conventional upper plates have a form in which heat-resistant tempered glass is attached to the upper surface of the upper cover, The electromagnetic wave generated from the working coil during operation of the induction cooker is discharged to the outside through the main body as well as the top plate so that various electric / electronic devices including the people around the cooker are damaged and obstructed .

Therefore, in some induction cookers, expensive electromagnetic shielding materials are applied to the bottom surface of the heat-resistant tempered glass or the inner surface of the main body. However, since the production cost is increased and the cost of the product itself is increased, And problems such as fan noise including some problems in glass.

Korean Registered Patent No. 10-0976447 (Aug. 11, 2010) Korean Registered Patent No. 10-1015763 (February 10, 2011) Korean Patent Publication No. 10-1039469 (May 31, 2011)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems of the prior art, and it is an object of the present invention to provide an induction cooker, which is made of a heating device for cooking so that various cooking can be performed by applying an induction heating principle, (EMI) shielding function and a heat-dissipating electromagnetic shielding material added to the main body of the heat-resistant composite resin material by injection molding so that the body fixing frame is integrally formed, thereby preventing damage to the human body caused by electromagnetic waves, It is possible to eliminate the need for post-processing such as edge processing, as well as to avoid the use of heat-resistant tempered glass, injection frame and silicone adhesive, thereby reducing the production cost of the product itself, It is easy to disassemble, easy to clean, and prevents it from being damaged by external impact It is possible to remarkably extend the lifetime and to increase the heat conversion efficiency by heat insulation, to save energy, to deteriorate the practical use of the transfer heat which has been lost by the conventional glass, It is an object of the present invention to provide an induction cooker of electromagnetic wave shielding type capable of preventing an explosion high risk expected from the inflow of a substrate,

It is another object of the present invention to provide an electronic device which is formed by molding a heat-resistant composite resin material having electromagnetic wave shielding function and heat dissipation function to completely prevent damage to the human body caused by electromagnetic waves discharged through the body, Shielding type induction cooker which can reduce the noise of the fan by reducing the size of the fan by increasing the heat radiation effect.

It is still another object of the present invention to provide an apparatus and a method for disposing an apparatus and a method for disposing the apparatus in such a manner that a support member receiving groove is formed at a position above the working coil, The resonance noise generated between the container and the upper plate contact area of the induction cooker can be minimized, the visual design effect can be raised by changing the color of the support member, the cleaning can be easily performed, and The bottom surface of the receiving groove and the receiving member may be provided with flow preventing protrusions, projection insertion grooves, elastic catching pieces, and the like, and an embossing protrusion may be formed on the upper surface thereof to reduce the contact force of the cooking container, And an electromagnetic wave shielding type induction cooker.

It is a further object of the present invention to provide a method of manufacturing an image forming apparatus that prints a thion sensor having a characteristic in which a color changes in response to a change in temperature at a position distant from a position where a container is raised from an upper plate, And the temperature sensor can be installed in a form passing through the upper plate so as to be elastically and directly contacted with the center of the bottom surface of the container so as to improve the reliability of the temperature control during cooking, Shielding type induction cooker which can secure an electromagnetic wave shielding type induction cooker.

It is a further object of the present invention to provide an apparatus and a method for manufacturing an induction cooker by attaching permanent magnets to one side of a top plate to easily and accurately check whether the container to be used for cooking is suitable for an induction cooking appliance Shielding type induction cooker which can significantly improve the electromagnetic wave shielding type induction cooker.

A further object of the present invention is to provide a deformation and discoloring prevention member made of a hard heat-resistant coating, a steel sticker or a high heat-resistant film on the upper surface of the upper plate except for the receiving member receiving groove, It is possible to prevent deformation and discoloration of a part of the upper plate formed of the heat resistant composite resin material due to deterioration and maintain the beauty of the upper plate itself when the temperature is raised (for example, 160 to 180 ° C) Shielding type induction cooker capable of greatly improving the convenience of use of the induction cooker.

In order to achieve the above object, the present invention provides a high frequency inverter type power supply unit, a blowing fan, and a working coil installed in a main body having a rectangular housing shape having an opened upper surface, an operation unit on an upper surface of the main body, An induction cooker having a structure in which an upper plate providing a space for loading and unloading is detachably installed through a separate body fixing frame, wherein the electromagnetic wave shielding material having an electromagnetic wave shielding and heat dissipating function And a supporting member receiving groove having a predetermined area and a predetermined depth is formed on the upper surface of the upper plate on which the working coil is placed, Removing and attaching the cooking vessel support member formed of non-toxic, heat-resistant and stretchable material like Teflon So that it can be installed.

The main body is also injection-molded with a heat-resistant composite resin material to which an electromagnetic wave shielding material having an electromagnetic wave shielding function and a heat radiation function is added.

In addition, the main body is characterized in that a ground wire is connected to one or a plurality of points to eliminate electromagnetic wave energy blocked by the top plate or the main body.

In addition, a flow preventing projection is protruded in the receiving groove of the upper plate, and a projection insertion groove is formed in the bottom surface of the cooking vessel receiving member so that the flow preventing projection is inserted.

In addition, when the cooking cavity receiving member is inserted into the receiving groove of the upper plate, the outer circumferential surface of the rotation preventing protrusion and the cooking cavity receiving member is located outside the projection insertion groove of the cooking cavity supporting member, And the resilient latching pieces are resiliently fitted in the inner surfaces of the seating grooves, respectively, so that the resilient latching pieces are prevented from being compressed or caught and released.

In addition, a plurality of embossing projections are further formed on the upper surface of the cooking vessel support member in order to reduce the bottom surface and the grounding area of the cooking vessel and to prevent the generation of heat insulation and vibration noise by the formation of the air layer.

In addition, at a position spaced a certain distance from the receiving groove of the upper plate, a color temperature is changed corresponding to the temperature change of the upper plate due to radiant heat of the container, and a temperature sensor Or a sheet member is printed or attached.

In addition, a temperature sensor outlet hole is drilled in the center of the upper plate and the cooking vessel support member, and a bottom portion is fixed to a resilient means formed by a coil spring or rubber at the center portion of the working coil, The temperature of the cooking container is detected in real time in a state in which it is elastically contacted with the bottom surface of the cooking container which is protruded on the upper surface of the cooking container supporting member and is transmitted to the micom provided in the high frequency inverter type power supply unit And a sensor is further provided.

In addition, a magnet fixing groove is formed on one side of the upper surface of the upper plate, and a permanent magnet is inserted into the magnet fixing groove so as to judge whether the cooking container to be used for cooking using the induction cooker is a magnetic substance- .

The heat-resistant composite resin material used for molding the upper plate and the main body is characterized by mixing PBT, PPS, PET or the like, which is a thermoplastic resin, based on the high heat-resistant composite polymer.

The electromagnetic wave shielding material added to the heat-resistant composite resin material used for molding the upper plate and the main body is preferably a powder of a polymeric resin and a conductive nonmagnetic material having a resistance of 0.1 to 100 (? / Cm2) (Ag, Ni, Cu, Al, Cb, etc.).

In addition, a deformation and discoloring prevention member made of a hard heat-resistant coating, a steel sticker, or a high heat-resistant film is further provided on the upper surface of the upper plate except the receiving member receiving groove.

As described above, according to the electromagnetic shielding type induction cooker of the present invention, the top plate of the induction cooker, which is manufactured by a heating device for cooking so as to perform various kinds of cooking by applying the induction heating principle, is made of tempered glass or melamine resin (EMI) shielding function and a heat-dissipating electromagnetic shielding material added to the main body frame by injection molding so that the body fixing frame is integrally formed, And it is possible to eliminate the use of the heat-resistant tempered glass, the injection frame, and the silicone adhesive, thereby reducing the production cost of the product itself, and the assembly and disassembly of the top plate Is easy to clean and is damaged by external impact It is possible to significantly extend the lifetime of the heat exchanger, to increase the thermal conversion efficiency by heat insulation, to save energy, to deteriorate the practical use of the transfer heat which has been lost by the conventional glass, It is possible to prevent the explosion high risk expected due to the influx of the circuit board. In particular, since the scratch does not occur even when used for a long period of time, the appearance can be kept beautiful and the commerciality can be greatly improved.

In addition, in the present invention, the body is formed of a heat-resistant composite resin material having an electromagnetic wave shielding function and a heat radiation property, thereby completely preventing damage to the human body caused by electromagnetic waves emitted through the body, In particular, since the size of the blowing fan can be reduced by increasing the heat radiation effect, fan noise can be greatly reduced.

In addition, according to the present invention, a supporting member receiving groove is formed at a position above the working coil to have a predetermined depth in a portion where the container is to be mounted, and a consumable supporting member formed of a nontoxic, heat resistant or stretchable material such as silicone, rubber, The resonance noise generated between the container and the upper plate contact area of the induction cooker can be minimized, the visual design effect can be raised by the color change of the support member, the cleaning can be easily performed, And the bottom surface of the supporting member may be provided with a flow preventing protrusion, a projection insertion groove, an elastic catching member, and the like, and an embossing protrusion may be formed on the upper surface of the support member to reduce the folding force of the cooking vessel and maximize the heat insulation of the top plate and the support member.

Further, in the present invention, by printing a thion sensor having a characteristic in which the hue changes in response to a change in temperature at a position distant from a position where the container is lifted from the upper plate, or by attaching a thermosensitive resin, In addition, the temperature sensor can be installed to pass through the upper plate so as to be elastically and directly contacted with the center of the bottom surface of the container, thereby improving the reliability of the temperature control during cooking. can do.

Further, in the present invention, by attaching the permanent magnet to one side of the upper plate, it is possible to easily and accurately confirm whether the container to be used for cooking is a container suitable for the induction cooking appliance (i.e., a magnetic substance-made container) Can be greatly improved.

In addition, in the present invention, a deformation and discoloring prevention member made of a hard heat-resistant coating, a steel sticker, or a high heat-resistant film is further provided on the upper surface of the upper plate excluding the receiving member receiving grooves, so that the food is overflowed to the upper plate, 160 to 180 ° C), it is possible to prevent deformation and discoloration of a part of the top plate formed of a heat resistant composite resin and deterioration of the top plate, and to maintain the beauty of the top plate itself. Which is a very useful invention.

1 is a partial perspective view of an electromagnetic wave shielding induction cooker to which an embodiment of the present invention is applied.
2 is a front sectional view of an electromagnetic shielding induction cooker to which an embodiment of the present invention is applied.
3 is an enlarged cross-sectional view taken along the line A in Fig.
4 is an enlarged sectional view of a portion B in Fig.
5 is a front sectional view of an electromagnetic shielding induction cooker to which another embodiment of the present invention is applied.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention and their operation and effect will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of an electromagnetic shielding induction cooker to which an embodiment of the present invention is applied, FIG. 2 is a front sectional view of an electromagnetic shielding induction cooker to which an embodiment of the present invention is applied, FIG. 3 is a cross- FIG. 4 is an enlarged cross-sectional view of a portion B in FIG. 2, and FIG. 5 is a front sectional view of an electromagnetic shielding induction cooker to which another embodiment of the present invention is applied.

According to the present invention,

A high frequency inverter type power supply unit 11, a working coil and an air blowing fan 12 for cooling an inverter and a working coil 13 are installed in a main body 1 having a rectangular housing shape whose upper surface is opened, And an upper plate (3) provided with an operating unit (4) on the upper surface and providing a lid function and a space for placing the cooking lid, wherein the upper plate (3) is detachably installed through a separate body fixing frame ,

The body fixing frame 2 including the upper plate 3 is integrally injection-molded using a heat-resistant composite resin material to which an electromagnetic wave shielding material having an electromagnetic wave shielding and heat radiation function is added, A receiving member receiving groove 31 having a predetermined area and a predetermined depth is formed on the upper surface of the upper plate 3 and the receiving member receiving groove 31 is formed of a non-toxic, heat-resistant or stretchable material such as silicone, rubber or Teflon And the cooking vessel supporting member 5 is detachably installed.

The main body 1 is also characterized in that it is injection-molded with a heat-resistant composite resin material to which an electromagnetic wave shielding material having an electromagnetic wave shielding and heat radiation function is added.

The main body 1 is characterized in that a ground line 14 is connected to one or a plurality of points so as to eliminate electromagnetic wave energy blocked by the upper plate 3 or the main body 1.

The flow preventive protrusion 311 is protruded and formed in the receiving member receiving groove 31 of the upper plate 3 and a protrusion insertion hole 311 for receiving the flow preventing protrusion 311 is formed on the bottom surface of the cooking container supporting member 5 And a groove 51 is further formed.

When the cooking cavity support member 5 is inserted into the receiving groove 31 of the upper plate 3 at the outside of the projection insertion groove 51 of the cooking cavity support member 5, The outer peripheral surfaces of the projections 311 and the cooking container supporting member 5 are resiliently fitted to the inner surfaces of the projection insertion grooves 51 and the receiving member seating grooves 31 so as not to be compressed or caught to be released, ) Is further molded.

A plurality of embossing projections 53 are further formed on the upper surface of the cooking vessel support member 5 in order to reduce the bottom surface and the grounding area of the cooking vessel and to prevent the generation of heat insulation and vibration noise by the formation of an air layer .

The color of the upper plate 3 is changed corresponding to the temperature change of the upper plate 3 due to the radiant heat generated in the cooking cavity at a position distant from the receiving groove 31 of the upper plate 3, 3 or a temperature sensor or a temperature member 6 for recognizing the overheating of the heat source 3 as a color change is printed or attached.

The temperature sensor outlet holes 30 and 50 are drilled in the center of the upper plate 3 and the cooking vessel receiving member 5 so that a coil spring or elasticity And the upper part is protruded outward through the temperature sensor access holes 30 and 50 to be elastically contacted with the bottom surface of the cooking container raised on the upper surface of the cooking container supporting member 5 A temperature sensor 7 for detecting the temperature of the cooking container in real time and transmitting the detected temperature to the micom provided in the high frequency inverter type power supply unit 11 is further provided.

A magnet fixing groove 32 is formed on one side of the upper surface of the upper plate 3 and a cooking vessel for use in cooking is provided in the magnet fixing groove 32 to detect whether the cooking vessel is a magnetic material vessel suitable for an induction cooking appliance And a permanent magnet 9 is inserted and installed so that it can be judged.

The heat-resistant composite resin material used for molding the upper plate and the main body is characterized by mixing PBT, PPS, PET or the like, which is a thermoplastic resin, based on the high heat-resistant composite polymer.

The electromagnetic wave shielding material added to the heat-resistant composite resin material used for molding the upper plate 3 and the main body 1 is a powder made of a polymeric resin and a conductive nonmagnetic material having a resistance of 0.1 to 100 (? / Cm2) Ag, Ni, Cu, Al, Cb, etc.).

In addition, a deformation and discoloring prevention member 33 made of a hard heat-resistant coating, a steel sticker or a high heat-resistant film is further provided on the upper surface of the upper plate 3 except for the receiving member receiving groove 31.

The operation and effect of the induction range according to the present invention having such a configuration will be described below.

1 to 4, an electromagnetic shielding induction range according to an embodiment of the present invention includes a high frequency inverter type power supply unit 11, a working coil and an air blowing fan 12 for cooling an inverter, And a top plate 3 detachably provided on the top surface of the main body 1 on which the operation coil 4 and the working coil 13 are mounted and which is detachably mounted. The electromagnetic wave generated by the working coil 13 is prevented from being radiated through the upper plate 3 by injection molding using the heat resistant composite resin material to which the electromagnetic wave shielding material is added so that the human body as well as the electric / Damage and obstacles to be prevented from becoming a major technology component.

In addition, in the present invention, the main body 1 is also formed of a heat-resistant composite resin material having an electromagnetic wave shielding function and heat dissipation property so as to shield electromagnetic waves emitted through the main body 1.

At this time, the heat-resistant composite resin material used for molding the upper plate 3 and the main body 1 includes a mixture of PBT, PPS, PET series or the like which is a thermoplastic resin based on a high heat-resistant composite polymer, The electromagnetic wave shielding material added to the composite resin material is a polymer resin widely known to have a very good electromagnetic wave shielding effect and a powder (Ag, Ni, Cu, Al, Cb, etc.) having a conductive nonmagnetic property with a resistance of 0.1 to 100 ) And the like.

As described above, when the upper plate 3 and the main body 1 are injection-molded using the heat-resistant composite resin material having an electromagnetic wave shielding function and a heat-dissipating property, the electromagnetic waves emitted from the working coil 13 in the main body 1 Can be completely prevented from being discharged through the upper plate (3) and the main body (1). Thus, it is possible to completely prevent damages to the human body and electric / electronic devices due to electromagnetic waves, 3), it is possible to lower the manufacturing cost by eliminating post-processing such as edge processing.

In addition, since the heat radiation characteristic is also excellent, the heat generated in the cooking utensil during cooking can be minimized to the inside of the main body 1, so that deterioration of the internal components can be prevented, energy can be saved, The amount of blowing air through the fan 12 can be reduced, so that the size of the blowing fan 12 can be reduced and fan noise can be greatly reduced.

In addition, even if an impact or the like is applied from the outside, since the upper plate 3 and the main body 1 itself molded with the heat-resistant composite resin material are not damaged, the service life can be greatly extended and the practical use of the transfer heat In addition, it is possible to prevent an explosive high risk that is expected due to the inflow of food liquid into the circuit board due to breakage of the glass, and it is also possible to maintain the beautiful appearance because the scratch does not occur even if it is used for a long period of time.

When the upper plate 3 is injection-molded using various heat-resistant composite resin materials having an electromagnetic shielding and heat-radiating function, the body fixing frame 2 having a rectangular frame shape is integrally molded from the same material, It is possible to reduce the production cost of the product itself as well as to detachably attach the upper plate 3 to the upper surface of the main body 1 because the process of bonding the injection frame to the heat- It is possible to easily engage or disassemble the body fixing frame 2 formed integrally with the lower portion of the upper plate 3 toward the lower portion thereof by using a plurality of screws or the like to facilitate handling and disassembly and assembly, The life of the upper plate 3 can be significantly extended because the upper plate 3 itself is not damaged even if an impact is applied.

In the present invention, when the upper plate 3 is molded so that the main body fixing frame 2 having a rectangular frame shape as described above is integrally formed, the upper plate 3 3) forming a receiving member seating groove 31 having a predetermined area and a predetermined depth on the upper surface of the cooking cavity receiving groove 31 and forming the cooking cavity receiving member 5 separately from the upper plate 3, So that it can be installed as much as possible.

The reason why the receiving member receiving groove 31 can be easily formed on the upper plate 3 at a low cost as described above is that the shape and shape are designed and manufactured differently from the case of manufacturing the upper plate with heat- This is because the upper plate 3 can be injection-molded from a heat-resistant composite resin material through a free injection mold.

At this time, as the molding material of the cooking container supporting member 5, a material such as silicone, rubber, or Teflon which is not toxic, has excellent heat resistance (resistance between 250 and 300 ° C.) and very low thermal conductivity However, silicon or rubber has more frictional force than Teflon and has a more effective effect of preventing slipping of the cooking vessel.

When the support member seating groove 31 is formed on the upper surface of the upper plate 3 and the cooking cavity support member 5 having the predetermined shape is provided on the upper plate 3, the resonance noise generated between the contact area of the cooking vessel and the upper plate It is possible to increase the visual design effect owing to the color change of the cooking vessel support member. In particular, since the cooking vessel support member 5 can be attached and detached, it is easy to clean and can be replaced as a consumable article for long- It is possible to keep the top plate of the induction cooker applied at all times clean and clean.

In the present invention, a plurality of embossing projections (53) are further formed on the upper surface of the cooking vessel support member (5) during injection molding to put the cooking vessel on the upper surface of the cooking vessel supporting member A part of the bottom surface of the cooking vessel is not in direct contact with the upper surface of the cooking vessel supporting member 5 but is in contact with the upper surface of the plurality of embossing projections 53. This can greatly reduce the contact area of the bottom surface of the cooking vessel In addition, even if water or broth flows, it is possible to prevent the cooking vessel from sticking to the upper surface of the cooking vessel supporting member 5, thereby ensuring safety.

In addition, since the air layer is formed by the plurality of embossing projections 53 between the bottom surface of the cooking vessel and the upper surface of the cooking vessel supporting member 5, the heat generated in the cooking vessel under cooking is prevented from being transferred to the cooking vessel supporting member 5, And the upper plate 3 can be doubly blocked by the air layer formed by the embossing protrusion 53 as well as the embossing protrusion 53 so that the life of various component parts provided in the main body 1 is greatly extended Since the cooling efficiency of the top plate is high and the number of revolutions of the air blowing fan 12 can be reduced, unnecessary fan noise can be prevented from being generated.

In the present invention, the ground line 14 is connected to the main body 1, and the ground line 14 is connected to one or more points corresponding to the total electrical resistance value of the main body 1 and the top board 3 (That is, the electromagnetic wave blocked by the upper plate 3 or the main body 1) blocked by the electromagnetic wave shielding material added to the heat-resistant composite resin material when the upper plate 3 or the main body 1 is molded, Is discharged through one or a plurality of ground lines (14), so that the damage due to electromagnetic waves can be completely prevented.

In addition, in the present invention, the flow prevention protrusion 311 is further protruded outside the receiving member receiving groove 31 of the upper plate 3, and the flow preventing protrusion 311 When the cooking container supporting member 5 is inserted into the receiving member receiving groove 31 of the upper plate 3 by further forming a projection receiving groove 51 in which the receiving member receiving groove 51 is inserted, The flow prevention protrusion 311 protruding from the bottom of the cooking cavity support member 5 is inserted into the projection insertion groove 51 formed in the bottom surface of the cooking cavity support member 5 to prevent the flow of the cooking cavity support member 5 itself As well as free separation can be prevented to some extent.

However, in this state, since the flow preventing protrusion 311 of the receiving member receiving groove 31 is simply fitted into the projection insertion groove 51 of the cooking container supporting member 5, When the induction cooker to which the invention is applied tilts at a predetermined angle or is turned upside down, the cooking cavity support member 5 may be easily detached from the support member seating groove 31 of the upper plate 3. [

Therefore, in the present invention, by further forming the elastic catching piece 52 on the outside of the projection insertion groove 51 of the cooking vessel support member 5, the cooking vessel support member 5 is fixed to the receiving member 5 of the upper plate 3 The outer circumferential surface of the cooking cavity support member 5 is elastically inserted into the inner wall of the receiving member seating groove 31 by the resilient holding piece 52 and is engaged with the cooking cavity holding groove 31, Since the pressing force is applied to the flow preventing protrusion 311 at the bottom of the receiving member receiving groove 31 inserted into the receiving groove 51 of the member 5, It is possible to completely prevent the cooking container supporting member 5 from being freely separated and removed.

In the present invention, when the temperature of the upper plate 3 changes due to the radiant heat generated in the cooking container at a position distant from the receiving groove 31 of the receiving member 31, The color change of the temperature sensor or the temperature member 6 can be visually observed while the cooker is performing the cooking using the induction cooker or performing other work at a close distance by printing or attaching the changing temperature sensor or the temperature member 6. [ It is possible to precisely grasp whether or not the upper plate 3 is overheated and immediately take necessary measures for overheating.

At this time, the zeolite pigment used for manufacturing the zeon temperature sensor or the zeon member (6) is a microcapsule-like dye whose color changes according to temperature. It is an ink which can change its color when a certain temperature is reached. It is called chameleon ink. It is called "Zion pigment", "thermometric pigment", "thermocolor" in technical terms.

There are two types of zeotropic pigments: reversible and non-reversible, which change color when the temperature rises and return to the original color when the temperature rises.

Here, the combination of the reversible zeolite pigment can be seen in various colors when the temperature is elevated. There is a simple thermometer using this, and a cup in which the color changes when the hot water is poured. The irreversible zeolite pigment It is a pigment that does not return to its original color when the color is changed. It is used to check whether the food is sterilized by heating.

Also, as you can mix colors to create a variety of colors, you can mix different colors to create different colors, and the color temperature can be changed from minus 15 degrees to 70 degrees.

In order to solve the conventional problem that the temperature detection temperature difference is caused by directly attaching to the bottom surface of the upper plate, the temperature sensor inlet and outlet holes 30 (30) are formed at the center of the upper plate 3 and the cooking vessel receiving member 5 And a resilient means 8 formed by a coil spring or rubber is installed on the upper surface of the center of the working coil 13 positioned immediately below the temperature sensor access holes 30 and 50, On the upper surface of the elastic means 8, an upper end portion is protruded to the outside through the temperature sensor access holes 30 and 50 to provide a cooking container temperature detection temperature sensor 7.

Therefore, when the cooking container is placed on the upper surface of the cooking container supporting member 5, the upper end of the cooking container temperature detecting temperature sensor 7 is subjected to the elastic force of the elastic means 8, (I.e., in close contact with each other) regardless of the state of the contact surface.

Therefore, when cooking is carried out with specific foods, the temperature of the cooking vessel can be accurately detected in real time by the temperature sensor 7 for detecting the cooking vessel temperature and delivered to the micom provided in the high frequency inverter type power supply unit 11, Reliability according to temperature control can be improved, and safety against abnormal overheating can be ensured.

In addition, in the present invention, a magnet fixing groove 32 is formed on one side of the upper surface of the upper plate 3, and a permanent magnet 9 is inserted into the upper side of the upper plate 3 to allow the user to use the induction cooker It is possible to accurately determine whether the cooking container is a container having a magnetic material suitable for the induction cooker by means of a method of confirming whether the cooking container to be adhered to the permanent magnet 9 is in contact with the permanent magnet 9, Can be improved.

5, the upper surface of the upper plate 3 except for the receiving member receiving groove 31 may be provided with a deformation and discoloring prevention member 33 made of a hard heat-resistant coating or a steel sticker or a high heat resistant film, ), The food is overflowed to the upper plate 3 while the food is being cooked using the induction cooker to which the present invention is applied, or when the food is fried (for example, 160 to 180 ° C) Even if oil spreads on the molded upper plate 3, the deformation and discoloration preventing member 33 blocks the oil.

Therefore, it is possible to prevent a part of the upper plate 3 formed of a heat-resistant composite resin material from being deformed or discolored due to deterioration, and it is possible to prevent the upper plate 3 itself from being deteriorated And the merchantability of the product can be greatly improved.

Although the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Which will be apparent to those skilled in the art.

1: Body
11: High frequency inverter type power supply unit 12:
13: Working coil 14: Ground wire
2: Body frame
3: Top plate
30: Temperature sensor entrance hole 31: Support member seat groove
311: Flow prevention protrusion 32: Magnet fixing groove
33: Deformation and discoloration prevention member
4:
5: Cooking container support member
50: Temperature sensor access hole 51: Projection insertion groove
52: Elastic locking piece 53: Embossing projection
6: Zion sensor or Zion member
7: Temperature sensor for temperature detection
8: Elasticity means
9: permanent magnet

Claims (11)

An upper plate provided with a high frequency inverter type power supply unit, a blower fan and a working coil in a main body having a rectangular housing shape having an opened top face, a top cover having an operation unit, An induction cooker having a structure detachably installed through a separate body fixing frame,
Wherein the upper surface of the upper plate on which the working coil is placed is integrally injection-molded using a heat-resistant composite resin material containing electromagnetic shielding materials having electromagnetic wave shielding and heat radiation functions, Shielding type induction groove is formed in the receiving member receiving groove so as to be detachable from the cooking cavity holding groove formed in a non-toxic, heat-resistant and stretchable material such as silicone, rubber, or Teflon. Cooker.
The method according to claim 1,
The main body is injection-molded with a heat-resistant composite resin material to which an electromagnetic wave shielding material having an electromagnetic wave shielding and heat radiation function is added,
Wherein the main body is connected to a ground line at one or a plurality of points so as to eliminate electromagnetic wave energy blocked by the upper plate or the main body.
The method according to claim 1,
The induction cooker according to claim 1, wherein a flow preventing protrusion is protruded in the receiving groove of the upper plate, and a protrusion insertion groove is formed in the bottom surface of the cooking chamber receiving member to insert the flow preventing protrusion.
The method of claim 3,
The outer circumferential surfaces of the flow prevention protrusions and the cooking cavity support member are elastically fitted into the protrusion insertion grooves and the inner surface of the receiving groove receiving grooves so as not to be compressed, Wherein the electromagnetic wave shielding type induction cooker further comprises an electromagnetic shielding type induction cooker.
The method according to claim 1,
Wherein the upper surface of the cooking vessel support member further comprises a plurality of embossing projections formed by protruding to reduce the bottom surface and the grounding area of the cooking vessel and to prevent the generation of heat insulation and vibration noise by the formation of the air layer.
The method according to claim 1,
A temperature sensor or a temperature sensor for changing the color of the upper plate due to the radiant heat of the container due to the temperature change of the upper plate so that the cooker can recognize the overheating of the upper plate as a color change, Wherein the electromagnetic wave shielding type induction cooker is a printed circuit board.
The method according to claim 1,
A temperature sensor outlet hole is drilled in the center of the upper plate and the cooking vessel receiving member. A bottom portion of the heating coil is fixed to a resilient means formed by a coil spring or rubber at the center of the working coil, A temperature sensor for detecting a cooking container temperature for detecting the temperature of the cooking container in real time in a state of being elastically contacted with the bottom surface of the cooking container raised on the upper surface of the cooking container supporting member and transmitting the detected temperature to the micom provided in the high frequency inverter type power supply unit Wherein the electromagnetic wave shielding type induction cooker further comprises an electromagnetic wave shielding type induction cooker.
The method according to claim 1,
A magnet fixing groove is formed on one side of the upper surface of the upper plate and a permanent magnet is inserted into the magnet fixing groove so as to judge whether the cooking container to be used for cooking using the induction cooker is a magnetic substance- Which is an electromagnetic shielding type induction cooker.
The method according to any one of claims 1 to 3,
The heat-resistant composite resin material used for molding the upper plate and the main body,
An induction cooker of electromagnetic wave shielding type characterized by mixing PBT, PPS or PET series which is a thermoplastic resin based on a high heat resistant composite polymer.
The method according to any one of claims 1 to 3,
The electromagnetic wave shielding material added to the heat-
(Ag, Ni, Cu, Al, Cb) having a conductive nonmagnetic property with a polymer resin and a resistance of 0.1 to 100 (? / Cm2).
The method according to claim 1,
Shielding type induction cooker further comprises a deformation and discoloration preventing member made of a hard heat-resistant coating, a steel sticker or a high heat-resistant film on an upper surface of the upper plate except the receiving member receiving groove.

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