WO2017035895A1 - Dispositif de chauffage par induction et son procédé de fabrication - Google Patents

Dispositif de chauffage par induction et son procédé de fabrication Download PDF

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Publication number
WO2017035895A1
WO2017035895A1 PCT/CN2015/091298 CN2015091298W WO2017035895A1 WO 2017035895 A1 WO2017035895 A1 WO 2017035895A1 CN 2015091298 W CN2015091298 W CN 2015091298W WO 2017035895 A1 WO2017035895 A1 WO 2017035895A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating
heating coil
receiving body
bottom wall
cover layer
Prior art date
Application number
PCT/CN2015/091298
Other languages
English (en)
Chinese (zh)
Inventor
孙侥鲜
刘秀强
王长明
谢守德
徐丹
Original Assignee
东莞劲胜精密组件股份有限公司
东莞华程金属科技有限公司
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 东莞劲胜精密组件股份有限公司, 东莞华程金属科技有限公司 filed Critical 东莞劲胜精密组件股份有限公司
Publication of WO2017035895A1 publication Critical patent/WO2017035895A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • 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
    • 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
    • H05B6/36—Coil arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the invention relates to an induction heating device and a manufacturing method thereof.
  • the heating coil of the ordinary electrical product is generally a 2D coil, and the heating of the 2D coil generally heats the bottom of the inner pot, and the heat is transmitted from the bottom of the container to the upper portion through contact conduction, so that the temperature of the pot is slow and the heat is not uniform.
  • An induction heating device comprising: a receiving body comprising a bottom wall and a side wall surrounding the bottom wall; and a heating coil distributed around the plurality of turns and fixedly attached to the bottom wall and the side wall, the heating coil And comprising two contacts respectively disposed at two ends, and a cover layer formed on the heating coil by injection molding, and coating the heating coil between the cover layer and the receiving body, the two contacts Exposed from the cover layer to form a positive and negative electrode.
  • a method for manufacturing an induction heating device includes the following steps:
  • the receiving body comprising a bottom wall and a side wall surrounding the bottom wall;
  • heating body Processing the heating body into a plurality of turns of a heating coil that is circumferentially distributed and attached to the bottom wall and the side wall, the heating coil including two contacts respectively located at both ends;
  • the heating coil is disposed around the bottom wall and the side wall of the receiving body, it can be extended in a three-dimensional space, so that the area can be designed to be larger, and the surrounding heating can be realized, thereby improving the heating effect and allowing the receiving.
  • the pot on the body heats up quickly and the heating effect is more uniform.
  • Figure 1 is a perspective view of a receiving body of an embodiment
  • FIG. 2 is a perspective view of a heating body of an embodiment
  • FIG 3 is a perspective view of the heating body of Figure 1 combined with the housing shown in Figure 2;
  • Figure 4 is a perspective view showing the formation of a heating coil on the housing shown in Figure 3;
  • FIG. 5 is a perspective view of the heating coil shown in Figure 4 after injection molding
  • Figure 6 is a partial schematic view showing the contact of the heating coil and the recess of the cover layer of an embodiment
  • Fig. 7 is a flow chart showing the steps of a method of fabricating an induction heating device according to an embodiment.
  • an induction heating device 100 (see FIG. 6) of an embodiment includes a housing 3, a heating coil 5, and a cover layer 8.
  • the housing 3 is formed by injection molding and includes a bottom wall and a side wall surrounding the bottom wall.
  • the overall contour of the heating coil 5 is in the shape of a pot and is distributed around a plurality of turns, and is fixedly attached to the bottom wall and the side wall of the receiving body 3.
  • the covering layer 8 is injection-molded on the heating coil 5 to cover the heating coil 5. Between the cover layer 8 and the container 3.
  • the heating coil 5 includes two contacts 6 at its both ends, and the contacts 6 are exposed from the cover layer 8 to form positive and negative electrodes.
  • the outer surface of the heating coil 5 is attached and fixed to the inner surface of the housing 3. Since the heating coil 5 is attached to the bottom wall and the side wall of the housing 3, it is not surrounded by the same plane, and thus may be referred to as a 3D heating coil. In other embodiments, the heating coil 5 can be attached and fixed to the outer surface of the housing 3.
  • the cover layer 8 is provided with a recess 7 at the position of the contact 6 to expose the contact 6 to the recess 7.
  • the edge of the housing 3 is also integrally formed with a positioning buckle 4.
  • the positioning buckles 4 are plural and are evenly spaced along the circumference of the housing 3 for positioning the housing 3 .
  • the heating coil 5 When the heating coil 5 is powered on by the contact 6, a surrounding magnetic field can be formed.
  • the metal pot When heating, the metal pot is placed in the receiving body 3, and the alternating magnetic field lines in the close magnetic field pass through the magnetic of the nearby metal pot.
  • Metal (iron, cobalt, nickel) materials will drive the microcrystalline structure of the metal, resulting in a myriad of small eddy currents, so that the microstructure of the metal material itself rubs against each other and heats itself, thus achieving the purpose of non-contact heating of the metal material.
  • the induction heating device 100 is heated by electromagnetic induction, and the heating coil 5 itself does not generate heat due to the magnetic field, and the heating ability and efficiency are high.
  • the heating coil 5 is disposed on the bottom wall and the side wall of the receiving body 2, the area of the heating coil 5 can be designed to be larger, and wraparound heating can be realized, thereby improving the heating effect and making the receiving body 3 warm up quickly. And the heating effect is more uniform.
  • the induction heating device 100 saves space, and the induction heating device 100 can be small in size and light in overall weight.
  • the induction heating device 100 has a uniform magnetic field distribution, a large effective induction area, uniform heating, high heating efficiency, and stable product performance.
  • the pot-shaped heating body 1 is processed and integrally formed with the injection molding material to form an induction heating device 100, which can be used for products such as intelligent heating pots.
  • the surrounding heating of the entire inner liner can be achieved, and the heating is obtained very uniformly.
  • the overall heating effect the heating area is increased by 50% compared with the ordinary coil, the temperature rises rapidly and the heating is uniform.
  • the power of the induction heating device of the present invention can easily reach about 1500 watts and is high in efficiency compared to the heat limit of several hundred watts of the heat resistance of the limited coil of the conventional coil.
  • the heating coil 5 of the present invention can also be used for purposes such as conducting electricity, receiving signals from an antenna, and the like.
  • the heating coil 5 Since the overall injection molding of the heating coil 5 is not exposed, only the two contacts 6 are exposed, so that the heating coil 5 is well protected, especially corrosion-resistant, and can be reliably waterproofed, which can greatly extend the service life of the product.
  • the heating coil 5 is integrally molded and wrapped, and the problem that a short circuit may occur between the wires of the coil after the product is used for a long time. It is also advantageous to obtain a higher quality factor by heating the coil 5, thereby significantly reducing the loss and increasing the inductance of the coil.
  • Induction heating device 100 can be widely used in various electrical fields, such as smart home appliances, including smart pots, smart refrigerators, smart TVs, etc., providing dustproof, scratch-resistant and anti-corrosion for future multi-functional consumer electronics induction heating devices. Excellent solutions such as anti-drop, shockproof and anti-oxidation.
  • a method for manufacturing an induction heating device includes the following steps:
  • Step S101 injection molding forms the housing 3, and the housing 3 includes a bottom wall and a side wall surrounding the bottom wall.
  • the material of the container 3 can be any plastic or ceramic material.
  • the plastic is, for example, PC, ABS, PC+ABS, PC+20%GF, and the like.
  • the thickness of the container 3 is 1 to 3 mm.
  • the nozzle temperature is 270 to 300 ° C
  • the mold temperature is 60 to 100 ° C
  • the injection pressure is 50 to 80 MPa.
  • the housing 3 is also in the shape of a pot, and the positioning buckle 4 is integrally formed at the edge thereof.
  • the positioning buckles 4 are plural and are evenly spaced along the circumference of the housing 3 for positioning the housing 3 .
  • the heating body 1 is formed of a metal material, and the shape of the heating body 1 matches the shape of the housing 3.
  • the heating body 1 can be stamped and formed from a metal material according to the shape desired for the product.
  • the heating body 1 can be made of a metal material having good electrical conductivity, small electrical resistivity and fast heat dissipation, such as silver, brass, phosphor bronze, beryllium copper and the like.
  • the heating body 1 can be formed by stamping, including cutting, stretching, punching and the like.
  • the heating body 1 has a bottom portion and a side portion that match the bottom wall and the side wall of the housing body 3, and both have a length and a width of 160 mm or more.
  • the heating body 1 may be subjected to nickel plating treatment of the metal material before being formed by stamping.
  • the heating body 1 is attached and fixed to the bottom wall and the side wall of the container 3.
  • the bottom and side portions of the heating body 1 can be respectively attached and fixed to the bottom wall and the side wall of the receiving body 3 by means of a backing or a dispensing primer.
  • the outer surface of the heating body 1 is attached and fixed to the inner surface of the housing 3. It can be understood that in another embodiment, the inner surface of the heating body 1 can also be attached and fixed to the outer surface of the container 3.
  • step S104 the heating body 1 is processed into a plurality of turns of the heating coil 5 which is distributed around the bottom wall and the side wall, and the contacts 6 are respectively formed on both ends of the heating coil 5.
  • the receiving body 3 can be fixed on the jig, and the heating body 1 is processed into a heating coil 5 by a process such as CNC, laser engraving and/or engraving.
  • the width of the heating coil 5 and the coil pitch can be set as needed.
  • the coil has a width of 1.5-6 mm and a line width of 0.5-3 mm for obtaining a larger inductance value and better inductivity.
  • each turn of the heating coil 5 is circular, square or polygonal, or several shapes in parallel or the like.
  • two contacts 6 are formed at both ends (i.e., both ends of the head and the tail) of the heating coil 5.
  • Two metal contacts 6 can be soldered at the respective locations.
  • the two contacts 6 can be pretreated, such as nickel plated or gold plated. Nickel plating can prevent the surface of the product from chemically reacting with oxygen or chlorine in the air or water, which can keep the appearance clean and bright and prolong the service life. It is gold-plated and has good chemical stability.
  • a cover layer 8 is formed on the heating coil 5 to cover the heating coil 5 between the cover layer 8 and the receiving body 3.
  • the two contacts 6 are exposed from the cover layer 8 to form a positive and negative electrodes.
  • the heating pot 2 can be placed in a mold, and plastic is injected into the mold to cover the heating coil 5 and expose the two contacts 6 so that the two contacts 6 form a positive and negative electrode.
  • the injection molding material used for the cover layer 8 may be a plastic material or a ceramic material suitable for injection molding.
  • step S105 the step of exposing the two contacts 6 of the heating coil 5 is specifically: the cover layer 8 leaves an empty slot 7 at the position of the contact 6, so that The contact 6 is exposed in the recess 7.
  • the heating coil 5 is processed by pressing a whole piece of metal after CNC, laser engraving and/or engraving, laser cutting, etc.
  • the width and coil spacing of the heating coil 5 can be processed and adjusted according to actual needs in a very flexible and convenient manner.
  • step S101 and step S102 can be reversed.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Cookers (AREA)

Abstract

L'invention porte sur un dispositif de chauffage par induction et son procédé de fabrication. Le dispositif de chauffage par induction comprend : un corps de réception (3) ; une bobine de chauffage (5) ; et une couche de recouvrement (7). Le corps de réception (3) comprend une paroi inférieure et une paroi latérale entourant la paroi inférieure. La bobine de chauffage (5) est enroulée autour de la paroi inférieure et de la paroi latérale en de multiples spires et y est fixée par collage. La couche de recouvrement (7) est moulée par injection sur la bobine de chauffage (5), et la bobine de chauffage (5) est enveloppée entre la couche de recouvrement (7) et le corps de réception (3). La bobine de chauffage (5) comprend deux contacts (6) au niveau de deux extrémités distales de cette dernière. Les deux contacts (6) sont dénudés de la couche de recouvrement (7) pour former des pôles positif et négatif.
PCT/CN2015/091298 2015-09-01 2015-09-30 Dispositif de chauffage par induction et son procédé de fabrication WO2017035895A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510557133.3A CN105082455A (zh) 2015-09-01 2015-09-01 一种3d线圈产品的制作方法及3d线圈产品
CN201510557133.3 2015-09-01

Publications (1)

Publication Number Publication Date
WO2017035895A1 true WO2017035895A1 (fr) 2017-03-09

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Application Number Title Priority Date Filing Date
PCT/CN2015/091298 WO2017035895A1 (fr) 2015-09-01 2015-09-30 Dispositif de chauffage par induction et son procédé de fabrication

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CN (1) CN105082455A (fr)
WO (1) WO2017035895A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105934015B (zh) * 2016-05-13 2019-12-27 佛山市顺德区美的电热电器制造有限公司 线圈盘及其制备方法和烹饪电器
CN109309977B (zh) * 2017-07-28 2021-10-26 佛山市顺德区美的电热电器制造有限公司 用于电磁烹饪器具的线圈盘及其制造方法、电磁烹饪器具

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CN1387207A (zh) * 2001-05-22 2002-12-25 佳能株式会社 线圈单元及其制造方法
CN101815375A (zh) * 2010-02-10 2010-08-25 冯小行 电磁炉线盘及其加工方法和热压成型设备
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CN102769950A (zh) * 2011-05-05 2012-11-07 江西德源欣茂铜业有限公司 电磁电饭煲用线盘及绕线方法
CN103298175A (zh) * 2012-02-27 2013-09-11 江西德源欣茂铜业有限公司 一种电磁电饭煲用线盘及其绕线方法
CN103400691A (zh) * 2013-08-02 2013-11-20 广东鼎燊科技有限公司 一种电磁炉线圈盘绕制模具及绕制方法

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CA2793828A1 (fr) * 2010-03-20 2011-09-29 Daido Steel Co., Ltd. Procede de fabrication de corps de bobine encaisse et corps de bobine encaisse
CN202396018U (zh) * 2011-12-02 2012-08-22 美的集团有限公司 一种电磁加热线圈盘
CN103280298A (zh) * 2013-05-29 2013-09-04 深圳顺络电子股份有限公司 一种电感线圈及其激光切割制造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1387207A (zh) * 2001-05-22 2002-12-25 佳能株式会社 线圈单元及其制造方法
CN102038435A (zh) * 2009-10-13 2011-05-04 三星电子株式会社 与烹饪用具一起使用的加热装置及其制造方法和烹饪用具
CN101815375A (zh) * 2010-02-10 2010-08-25 冯小行 电磁炉线盘及其加工方法和热压成型设备
CN101980582A (zh) * 2010-11-04 2011-02-23 浙江绍兴苏泊尔生活电器有限公司 一种用于电磁炉的线盘以及该线盘的制备方法
CN102769950A (zh) * 2011-05-05 2012-11-07 江西德源欣茂铜业有限公司 电磁电饭煲用线盘及绕线方法
CN103298175A (zh) * 2012-02-27 2013-09-11 江西德源欣茂铜业有限公司 一种电磁电饭煲用线盘及其绕线方法
CN103400691A (zh) * 2013-08-02 2013-11-20 广东鼎燊科技有限公司 一种电磁炉线圈盘绕制模具及绕制方法

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