WO2013118925A1 - Plage d'induction ayant une surface de plaque supérieure d'isolation thermique - Google Patents

Plage d'induction ayant une surface de plaque supérieure d'isolation thermique Download PDF

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Publication number
WO2013118925A1
WO2013118925A1 PCT/KR2012/000884 KR2012000884W WO2013118925A1 WO 2013118925 A1 WO2013118925 A1 WO 2013118925A1 KR 2012000884 W KR2012000884 W KR 2012000884W WO 2013118925 A1 WO2013118925 A1 WO 2013118925A1
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WO
WIPO (PCT)
Prior art keywords
coil
induction range
partition wall
upper plate
heat
Prior art date
Application number
PCT/KR2012/000884
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English (en)
Korean (ko)
Inventor
권용재
Original Assignee
(주)디포인덕션
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)디포인덕션 filed Critical (주)디포인덕션
Priority to PCT/KR2012/000884 priority Critical patent/WO2013118925A1/fr
Publication of WO2013118925A1 publication Critical patent/WO2013118925A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/34—Elements and arrangements for heat storage or insulation

Definitions

  • the present invention relates to an electric range, and more particularly, to an induction range having a top plate heat insulation structure that improves durability by insulating and heat insulating the top plate to block and discharge heat transmitted from the top plate to the coil side.
  • the energy efficiency of the induction range using the induction heating method is about 90%, which is considerably better than the gas range, hi-light range and hot plate with energy efficiency of 30 to 40%. Since there is little risk of fire and no harmful gas is emitted, it is being spotlighted as an eco-friendly and high-quality cooking utensil, and it is gradually spreading to large restaurants and hotels.
  • FIG. 1 is a schematic diagram showing a circuit of an induction range according to the prior art.
  • a copper coil 10 for generating an alternating magnetic flux to heat a heating target body is provided, and the copper coil 10 is connected to a magnetic circuit 20 for generating alternating magnetic flux.
  • the magnetic circuit 20 is connected to a power circuit including a rectifier 30 and an EMI filter 40, the power circuit is connected to the AC power supply 50.
  • the copper coil 10 which is the most important part of the induction range, is also called an inductor, and has a structure in which several strands of copper wire (enamel wire) are spirally wound.
  • the induction range heats the heating element (cooking vessel) according to the following three principles.
  • Ampere law An electric field that changes with time generates a magnetic field.
  • the copper coil When the electric field is applied to the copper coil by the Ampere's law, the copper coil generates a magnetic field, and this magnetic field generates a eddy current in the inside of the heating element located above the copper coil.
  • the object to be heated is a conductor such as iron or nickel
  • Eddy current is generated inside the object to be heated by the magnetic field generated in the copper coil by the following Faraday-Lenz law.
  • EMF electromotive force
  • the eddy current is called eddy current, which is caused by the change of magnetic flux in the conductor.
  • the current flows vortex (closed path) inside the conductor, it is called a eddy current, and heat is generated by its own resistance in the heating object.
  • the cooking vessel is heated.
  • FIG. 2 is a schematic cross-sectional view showing an induction range according to the prior art.
  • an upper plate 25 on which a heating body 35 may be placed is provided on the copper coil 15.
  • a lower portion of the copper coil 15 is provided with an upper structure including the copper coil 15 and a heater base 45 spaced apart from the lower structure including the power supply unit 55.
  • the air is circulated in the separation spaces provided between the upper plate 25, the copper coil 15, the heater base 45, and the power supply unit 55 to circulate the copper coil 15 and the power supply unit 55.
  • the induction range is formed with a structure including a cooling fan 65 to allow the cooling.
  • the heat generated while the heating element 35 is placed on the upper plate 25 is transferred to the copper coil 15 and the power supply unit 55, may cause a problem. That is, the inside of the induction range may be thermally shocked and may become unstable.
  • the power supply unit 55 includes rectifiers of a magnetic circuit and a power circuit.
  • heat is generated, and the copper coil 15 itself generates a lot of heat, so that the temperature inside the induction range becomes excessively high. Is there.
  • the copper coil of the induction heating apparatus used in the partial heat treatment of the metal in an industry or a factory uses a method of cooling by water, but a water cooling apparatus is installed inside the induction range manufactured for kitchen cookware.
  • a water cooling apparatus is installed inside the induction range manufactured for kitchen cookware.
  • the present invention is to provide an induction range having a top plate insulation structure for preventing direct heat transfer between the coil and the top plate to solve the above problems, and circulating the space therebetween with the outside air to cool.
  • An object of the present invention is to provide an induction range for protecting the coil by blocking the heat of the upper plate is transmitted to the coil.
  • An object of the present invention is to provide an induction range having a top plate heat insulation structure to prevent thermal damage of the coil to improve durability and safety.
  • the present invention the coil to form a magnetic field in accordance with the flow of current; An upper plate formed on an upper portion of the coil and on which a heating object is placed; A heat insulation layer provided on the inner surface of the upper plate; And an insulation partition wall disposed between the coil and the upper plate to partition a space under the upper plate to insulate the upper plate from the coil.
  • the thermal insulation layer has a thermal conductivity of 0.05 W / mK or less, preferably having heat resistance at a temperature of 300 °C to 1500 °C, it can be formed using an airgel nano-porous material.
  • the insulating partition wall is provided with a plurality of protrusions protruding toward the upper plate, to prevent sagging of the upper plate and to ensure a predetermined space between the upper plate and the insulating partition wall, wherein the insulating partition wall is It is more preferable to have a through hole for mounting a temperature sensor for measuring the temperature of the top plate.
  • the communication hole is an exhaust hole formed in the upper portion so that the heated air can be discharged, It is more preferable to include an intake hole formed in the lower or side so that air can be sucked.
  • it may further include a cooling fan for forcibly circulating the air in the space between the top plate and the insulating partition wall with the outside air.
  • the insulating partition wall is preferably a synthetic resin material having a thermal conductivity of 0.05W / mK or less, and heat resistance at a temperature of 100 °C ⁇ 400 °C, it is preferable that an air layer is formed between the coil and the thermal insulation partition wall. .
  • Induction range according to the present invention is provided with a heat insulating partition between the coil and the upper plate, to reduce the direct heat transfer between the upper plate and the coil, and to prevent thermal damage of the coil by communicating external air between the insulating partition and the upper plate to provide.
  • the heating of the coil can be prevented and the effect of providing an induction range with improved durability and stability is obtained.
  • FIG. 1 is a schematic diagram showing a circuit of an induction range according to the prior art
  • FIG. 2 is a cross-sectional view schematically showing an induction range according to the prior art
  • FIG. 3 is a cross-sectional view showing a vertical structure of the induction range according to the first embodiment of the present invention
  • FIG. 4 is a cross-sectional view showing a vertical structure of the induction range according to the second embodiment of the present invention.
  • FIG. 5 is a cross-sectional view showing an air circulation structure of an induction range according to a third embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing an air circulation structure of an induction range according to a fourth embodiment of the present invention.
  • FIG. 7 is a cross-sectional view showing the air circulation structure of the induction range according to the fifth embodiment of the present invention.
  • FIG 3 is a cross-sectional view showing a vertical structure of the induction range according to the first embodiment of the present invention.
  • the induction range includes components of the upper plate 120 on which the heating element 130 is placed, and a box-shaped outer case 170 formed under the upper plate.
  • the upper plate 120 is typically a tempered glass material that is not heated by electromagnetic induction.
  • the upper plate 120 may include a heat insulating layer 125 on the entire inner surface.
  • the insulation layer 125 reduces the transfer of heat from the top plate to the coil 100.
  • the heat insulation layer 125 is preferably formed so that the entire inner surface of the top plate may be covered.
  • the heat insulation layer 125 may be formed by a coating method or may be formed in a plate shape and then attached to an inner surface of the upper plate 120.
  • the heat insulation layer 125 has a thermal conductivity of 0.05 W / mK or less, and it is preferable to use a material having heat resistance at a temperature of 300 to 1500 ° C.
  • a material constituting the heat insulation layer 125 an airgel (Aerogel), which is a nanoporous material, may be used.
  • the heat insulation layer 125 is formed to have a thickness of 5 mm or less and a density of 3 g / cc or less by using an airgel.
  • a coil 100 for induction heating the object to be heated In the center of the induction range is formed a coil 100 for induction heating the object to be heated.
  • a general copper coil may be used as the coil 100, or a material coated with an insulating material on copper may be used.
  • These coils are in the form of improving the induction heating effect and dissipating heat generated from the coils themselves, and the present invention is not limited thereto.
  • a power supply unit 150 for applying power to the coil 100 is formed.
  • the power supply unit 150 is usually formed in the lower portion of the coil 100 in consideration of the internal space of the induction range, and may include a separate heat sink for radiating heat generated from the power supply unit 150.
  • the heater base 140 is formed between the coil 100 and the power supply unit 150.
  • the heater base 140 serves as a support for supporting the coil 100, and serves to separate the region where the coil 100 is formed and the region where the power supply unit 150 is formed. Since the power supply unit 150 includes electronic components vulnerable to heat, the power supply unit 150 separates the space for heat dissipation and heat insulation.
  • a cooling fan 160 is formed at the side of the coil 100, the heater base 140, and the power supply unit 150 so that the coil 100 and the power supply unit 150 may be cooled. do.
  • the cooling fan 160 supplies external air into the induction range or exhausts heat from the outside to cool the components inside the induction range.
  • the present invention includes a heat insulating partition 110 between the coil 100 and the top plate 120.
  • the insulation barrier 110 separates the space under the upper plate 120 from the coil 100.
  • the side surface between the top plate 120 and the insulating partition wall 110 may be wrapped by the outer case 170 as shown.
  • an air layer may be formed between the insulation barrier 110 and the coil 100 by separating the insulation barrier 110 and the coil 100 from each other.
  • the formed air layer serves as a heat insulating layer that blocks direct heat transfer between the heat insulating partition 110 and the coil 100, and the air of the air layer circulates like the air between the heat insulating partition 110 and the upper plate 120 and coils. 100 may be cooled.
  • the heating element 130 When the heating element 130 is placed on the upper plate 120, the heating element 130 is heated by the induced current generated by the coil 100. In addition, the heat of the heating body 130 is transferred to the upper plate 120, the heat of the upper plate 120 is transmitted to the coil 100 by radiation, convection, conduction.
  • the coil 100 and the upper plate 120 had a configuration of simply providing a heat insulating material, but the insulating partition wall 110 according to the present invention serves as a heat insulating material and at the same time the space under the upper plate 120 It serves to separate.
  • the air between the insulation barrier 110 and the upper plate 120 is circulated by external air and natural convection or forced circulation by a cooling fan to cool the insulation barrier 110.
  • the space between the upper plate 120 and the coil 100 which was simply provided with a heat insulator, is partitioned into a heat insulation partition wall 110 having heat insulation performance, and the cooling air is further improved by circulating external air in the compartment. It is.
  • the present invention reduces the damage to the coil 100 due to high temperature, thereby bringing the effect of improving the durability and stability of the induction range.
  • the insulating partition wall 110 applied in the present invention uses a synthetic resin material that is not affected by induction heating, and requires low thermal conductivity and predetermined heat resistance in order to serve as a heat insulating material.
  • a synthetic resin material having a thermal conductivity of 0.05 W / mK or less and having heat resistance at a temperature of 100 ° C. to 400 ° C. is used.
  • FIG. 4 is a cross-sectional view showing a vertical structure of the induction range according to the second embodiment of the present invention.
  • the induction range according to the second embodiment has a through hole 112 in the center of the insulating partition wall (110).
  • the through hole 112 is equipped with a temperature sensor 113 is in contact with the top plate 120 to measure the temperature.
  • the upper surface of the insulating partition wall 110 is provided with a plurality of protrusions 115 protruding to the upper plate (120). Since the heating object is placed on the upper plate 120 but the weight of the heating element is heavy (when the bear is pulled into the bucket, the weight may exceed 20 kg). It is preferable to provide a plurality of protrusions 115 on the upper surface of the partition wall 110 to ensure a constant space between the upper plate 120 and the insulating partition wall 110 and to prevent sagging of the upper plate 120.
  • FIG. 5 is a cross-sectional view showing the air circulation structure of the induction range according to the third embodiment of the present invention.
  • Induction range according to the present invention is the space between the top plate 120 and the insulating partition wall 110 is composed of a separate independent space from the other space inside, it is possible to allow natural air or natural convection or forced circulation.
  • This embodiment has a structure in which the outside air is introduced into the natural convection to cool.
  • the space partitioned between the top plate 120 and the insulating partition wall 110 has communication holes 117a and 117b through which the air of communication with the outside can enter and exit. Outside air is introduced into the space between the upper plate 120 and the insulating partition wall 110 through the communication holes 117a and 117b, or heated air is discharged to the outside between the upper plate 120 and the insulating partition wall 110.
  • the communication holes 117a and 117b may be formed in the upper plate 120, the outer case 170, or the insulating partition wall 110, and may be formed in a portion to which they are connected.
  • a plurality of communication holes 117a and 117b are provided, some of the communication holes 117a serve as intake holes, and some of the communication holes 117b are exhausted. It is desirable to be able to act as a ball.
  • the heated air expands and expands in volume, it is preferable to be disposed above the 117b communication hole in order to perform the role of the exhaust hole, and to perform the role of the intake hole in the lower part as in the 117a communication hole of the figure. It is preferable to arrange.
  • FIG. 6 is a cross-sectional view illustrating an air circulation structure of an induction range according to a fourth embodiment of the present invention
  • FIG. 7 is a cross-sectional view illustrating an air circulation structure of an induction range according to a fifth embodiment of the present invention.
  • the air circulation system by natural convection is employed, but in order to obtain a higher cooling effect, it is preferable to perform forced circulation using a cooling fan.
  • the fourth embodiment is a structure that can simultaneously cool the space between the power supply unit 150, the top plate 120 and the insulating partition wall 110 by using one cooling fan. That is, the fourth embodiment changes the installation position of the cooling fan 162 provided for cooling the power supply unit 150 to forcibly circulate up to the air in the space between the upper plate 120 and the insulating partition wall 110.
  • the fifth embodiment has a structure having a separate cooling fan 165 for cooling the space between the top plate 120 and the insulating partition wall 110. It is possible to further improve the cooling efficiency provided with a separate dedicated cooling fan 165.
  • the cooling fan operates to blow outside air into the induction range, or to exhaust the air inside the induction range to the outside, thereby forcibly circulating the heated air inside the induction range and the outside air having a relatively low temperature, thereby inducing the induction range. It cools the internal parts.
  • the present invention brings the effect of improving the durability and stability of the induction range.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Cookers (AREA)

Abstract

La présente invention porte sur une plage électrique et plus particulièrement sur une plage d'induction ayant une surface de plaque supérieure d'isolation thermique pouvant isoler thermiquement une plaque supérieure afin de prévenir le transfert de chaleur de la plaque supérieure vers une bobine et évacuer la chaleur, et par conséquent améliorer la durabilité de la plage d'induction. La présente invention décrit une plage d'induction comprenant : une bobine pour la formation d'un champ magnétique par un courant qui y passe ; une plaque supérieure agencée sur la bobine qui favorise le placement d'un objet à chauffer sur celle-ci ; une couche d'isolation thermique formée sur une surface interne de la plaque supérieure ; et une paroi de séparation d'isolation thermique déposée entre la bobine et la plaque supérieure dans le but de diviser l'espace sous la plaque supérieure et séparer la plaque supérieure de la bobine.
PCT/KR2012/000884 2012-02-07 2012-02-07 Plage d'induction ayant une surface de plaque supérieure d'isolation thermique WO2013118925A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2012/000884 WO2013118925A1 (fr) 2012-02-07 2012-02-07 Plage d'induction ayant une surface de plaque supérieure d'isolation thermique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2012/000884 WO2013118925A1 (fr) 2012-02-07 2012-02-07 Plage d'induction ayant une surface de plaque supérieure d'isolation thermique

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WO2013118925A1 true WO2013118925A1 (fr) 2013-08-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2704877A1 (es) * 2017-09-20 2019-03-20 Bsh Electrodomesticos Espana Sa Sistema de cocción
WO2022122338A1 (fr) * 2020-12-11 2022-06-16 BSH Hausgeräte GmbH Système de cuisson et procédé d'installation d'un système de cuisson

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002075610A (ja) * 2000-08-31 2002-03-15 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2008192443A (ja) * 2007-02-05 2008-08-21 Tokyo Electric Power Co Inc:The 空冷装置及び空冷方法
JP2008270120A (ja) * 2007-04-25 2008-11-06 Matsushita Electric Ind Co Ltd 誘導加熱装置と扁平状のコイル導線の製造方法
KR100976447B1 (ko) * 2009-08-31 2010-08-17 (주)디포인덕션 상판 단열 구조를 구비한 인덕션 레인지
KR20100117444A (ko) * 2009-04-24 2010-11-03 고려대학교 산학협력단 인덕션 레인지

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002075610A (ja) * 2000-08-31 2002-03-15 Matsushita Electric Ind Co Ltd 誘導加熱調理器
JP2008192443A (ja) * 2007-02-05 2008-08-21 Tokyo Electric Power Co Inc:The 空冷装置及び空冷方法
JP2008270120A (ja) * 2007-04-25 2008-11-06 Matsushita Electric Ind Co Ltd 誘導加熱装置と扁平状のコイル導線の製造方法
KR20100117444A (ko) * 2009-04-24 2010-11-03 고려대학교 산학협력단 인덕션 레인지
KR100976447B1 (ko) * 2009-08-31 2010-08-17 (주)디포인덕션 상판 단열 구조를 구비한 인덕션 레인지

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2704877A1 (es) * 2017-09-20 2019-03-20 Bsh Electrodomesticos Espana Sa Sistema de cocción
WO2019058202A1 (fr) * 2017-09-20 2019-03-28 BSH Hausgeräte GmbH Système de cuisson
WO2022122338A1 (fr) * 2020-12-11 2022-06-16 BSH Hausgeräte GmbH Système de cuisson et procédé d'installation d'un système de cuisson

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