JP2016143465A - Heating coil for induction heating and induction heating cooker - Google Patents
Heating coil for induction heating and induction heating cooker Download PDFInfo
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- JP2016143465A JP2016143465A JP2015016306A JP2015016306A JP2016143465A JP 2016143465 A JP2016143465 A JP 2016143465A JP 2015016306 A JP2015016306 A JP 2015016306A JP 2015016306 A JP2015016306 A JP 2015016306A JP 2016143465 A JP2016143465 A JP 2016143465A
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- 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
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- 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
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Abstract
Description
本発明は、誘導加熱用の加熱コイル、および、それを用いた誘導加熱調理器に関するものである。 The present invention relates to a heating coil for induction heating and an induction heating cooker using the same.
従来、この種の誘導加熱調理器の誘導加熱用の加熱コイルでは、銅線を芯線として外層にエナメル絶縁を施した極細の素線を複数本撚った撚り線に、電力を供給するための接続部として黄銅やリン青銅を主成分とする銅系金属板を使用した接続端子を接続し、撚り線と接続端子の電気的接続は、撚り線の絶縁被膜を高温で溶解して接続する溶接構成とするのが一般的である。 Conventionally, a heating coil for induction heating of this type of induction heating cooker is used to supply electric power to a stranded wire in which a plurality of ultrafine strands having a copper wire as a core wire and enamel insulation on the outer layer are twisted. Connect the connection terminal using a copper-based metal plate mainly composed of brass or phosphor bronze as the connection part, and the electrical connection between the stranded wire and the connection terminal is by welding by melting the insulation film of the stranded wire at a high temperature Generally, it is configured.
しかしながら、前述した誘導加熱用コイルの線材を銅線からアルミ線に変更した場合、銅の融点（約１０００℃）に対してアルミニウムの融点が約６６０℃と低くなり、アルミ線の融点と絶縁被覆を破壊する温度との差が大きく取れないため、特許文献１では、接続端子に接続するアルミ線の加圧部を上面と下面の二面で抑え、上面と下面からなる収納部が均一の厚さとなることで、加熱時に熱の分布が均一となり、部分的な高温部が発生しないことで、アルミ線と接続端子との接続の信頼性を向上したものである。 However, when the wire for the induction heating coil is changed from a copper wire to an aluminum wire, the melting point of aluminum is about 660 ° C. lower than the melting point of copper (about 1000 ° C.). In Japanese Patent Application Laid-Open No. H10-228707, the pressure portion of the aluminum wire connected to the connection terminal is suppressed by two surfaces, the upper surface and the lower surface, and the storage portion composed of the upper surface and the lower surface has a uniform thickness. As a result, the heat distribution becomes uniform during heating, and the partial high temperature portion does not occur, thereby improving the reliability of connection between the aluminum wire and the connection terminal.
しかしながら、上記した構造においては、誘導加熱コイルに使用されるアルミのコイル導線は、線径が略０．２〜０．４ｍｍの素線を数十本から数百本程度撚り合わせて形成されているため次の課題が考えられる。 However, in the above structure, the aluminum coil conductor used for the induction heating coil is formed by twisting several tens to several hundreds of strands having a wire diameter of approximately 0.2 to 0.4 mm. Therefore, the following issues can be considered.
コイル導線の加圧部となる収納部は、接続端子を単にＵ字状に曲げられた構造のため、Ｕ字状に曲げられた一端側に対して閉成側の合わせ部には狭小空間が発生し、その狭小空間に素線数本が誘導されてコイル導線の断面が歪められたり、この狭小空間が空間として残ることで、均一な加熱が出来ない課題が考えられる。 Since the storage portion serving as the pressure portion of the coil conductor has a structure in which the connection terminal is simply bent in a U shape, there is a narrow space in the mating portion on the closed side with respect to one end side bent in the U shape. It is considered that several wires are induced in the narrow space and the cross section of the coil conducting wire is distorted, or the narrow space remains as a space, so that uniform heating is not possible.
また、電流を流し外部から熱を加えた場合、接続端子の収納部と接している側から加熱が始まるため、収納部に収まったコイル導線の外側の素線から中心側の素線まで熱伝導するのに時間を要したり、該時間を短くするのに加熱温度を高くする必要が考えられ、その場合はコイル導線の表面側と中心側とで温度差が生じる課題が考えられる。 In addition, when current is applied and heat is applied from the outside, heating starts from the side of the connection terminal that is in contact with the housing part, so heat conduction from the outer strand of the coil conductor housed in the housing portion to the central strand In order to reduce the time, it may be necessary to increase the heating temperature. In such a case, there may be a problem that a temperature difference occurs between the surface side and the center side of the coil conductor.
本発明は、上記の課題を解決するためになされたものであり、アルミ線の外層に絶縁被覆を設けた素線を複数本撚り合わせたコイル導線と、該コイル導線の両端側に電力の供給を受けるための接続端子とを備え、該接続端子には、前記コイル導線の前記素線を略二段に平形状に形成して加圧固定する収納部を設け、前記収納部の外側にある前記コイル導線を略平形状に成形し、前記コイル導線の前記収納部への固定は、前記コイル導線の先端側を前記収納部より出し、前記コイル導線の前記先端側と前記収納部、前記コイル導線のコイル側と前記収納部とを半田付けによって電気的に接続したものである。 The present invention has been made in order to solve the above-described problems. A coil conductor obtained by twisting a plurality of strands each having an insulating coating on an outer layer of an aluminum wire, and supplying power to both ends of the coil conductor. A connecting portion for receiving the coil, and the connecting terminal is provided with a receiving portion for forming and press-fixing the element wire of the coil conductor in a flat shape in substantially two steps, and is provided outside the receiving portion. The coil conducting wire is formed in a substantially flat shape, and the coil conducting wire is fixed to the housing portion by extending the distal end side of the coil conducting wire from the housing portion, the distal end side of the coil conducting wire, the housing portion, and the coil. The coil side of the conducting wire and the storage portion are electrically connected by soldering.
本発明によれば、アルミ線を使用したコイル導線と接続端子との接続部において、信頼性が高く品質の安定した接続を提供することができる。
ADVANTAGE OF THE INVENTION According to this invention, in the connection part of the coil conducting wire which uses an aluminum wire, and a connection terminal, connection with high reliability and stable quality can be provided.
以下本発明の一実施例を図面に基づいて詳細に説明する。図１は一実施例を示す誘導加熱用コイルの斜視図、図２は誘導加熱用コイルのコイル導線の断面図を示す。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an induction heating coil showing an embodiment, and FIG. 2 is a cross-sectional view of a coil conductor of the induction heating coil.
１は加熱コイルで、鍋などの被加熱物を誘導加熱するものである。２はコイル導線で、絶縁皮膜１３で覆われたアルミニウムを材料としたアルミ線１２から成る直径が略０．２〜０．４ｍｍの素線１１を数十本から数百本程度撚り合わせた撚り線を渦巻状に配置したものである。１４は自己融着被膜で、コイル導線２を渦巻状に巻いた時にコイル導線２を加熱することで隣接するコイル導線２間で接着するものである。４はコイルベースで、加熱コイル２を平面状に保持固定するものである。 Reference numeral 1 denotes a heating coil that induction-heats an object to be heated such as a pan. Reference numeral 2 denotes a coil conductor, which is formed by twisting several dozens to several hundreds of strands 11 each having a diameter of about 0.2 to 0.4 mm made of an aluminum wire 12 made of aluminum covered with an insulating film 13. Wires are arranged in a spiral shape. Reference numeral 14 denotes a self-bonding coating, which is bonded between adjacent coil conductors 2 by heating the coil conductor 2 when the coil conductor 2 is wound in a spiral shape. A coil base 4 holds and fixes the heating coil 2 in a flat shape.
素線１１の表面に設けられているエナメル層からなる絶縁皮膜１３は、電気的に絶縁性能を有した数ミクロンの膜で構成し、エナメル層の材質は一般的にはポリウレタンやポリアミドやポリイミド等の組成の材質が使用されている。また、その外層には融解温度が約２３０℃程度の自己融着皮膜１４が設けられている。 The insulating film 13 made of an enamel layer provided on the surface of the element wire 11 is composed of a film of several microns having an electrically insulating performance, and the material of the enamel layer is generally polyurethane, polyamide, polyimide, etc. The material of the composition is used. Further, a self-bonding film 14 having a melting temperature of about 230 ° C. is provided on the outer layer.
絶縁皮膜１３の融点と絶縁性能破壊温度についてまとめると、自己融着皮膜１４の溶融温度が約２３０℃で一番低く、次に絶縁皮膜１３の絶縁性能破壊温度が２３０℃から４００℃である。素線１１の溶融温度は約６６０℃である。軟化温度は、素線１１のアルミニウムの２６０℃が一番低い。 The melting point of the insulating film 13 and the insulation performance breakdown temperature are summarized as follows. The melting temperature of the self-bonding film 14 is the lowest at about 230 ° C., and then the insulation performance breakdown temperature of the insulating film 13 is 230 ° C. to 400 ° C. The melting temperature of the strand 11 is about 660 ° C. The softening temperature is lowest at 260 ° C. of aluminum of the wire 11.
次に図３〜図５に基づいて接続端子とコイル導線との接続形態について詳細に説明する。 Next, the connection form between the connection terminal and the coil conductor will be described in detail with reference to FIGS.
３は接続端子で、黄銅やリン青銅をプレス加工により形成さ、加熱コイル１の両端に各１個接続され、図示していないインバータ回路より電力の供給を受ける端子である。詳細は、インバータ回路からの電力を供給するケーブル端子をネジで固定するためのネジ穴３ａと、加熱コイル１のコイル導線２を加締めて後述する収納部２１を形成する加締め部３ｂから成り、加締め部３ｂは一端側３２ｂと他端側３２ｃ、そして曲げ部となるＵ字部３２ａとなっている。また、曲げ部（Ｕ字部３２ａ）に切り込み３２ｄを一か所もしくは二か所設けられている（図３は対向する二か所に切り込み３２ｄを設けている）。 Reference numeral 3 denotes a connection terminal, which is formed by pressing brass or phosphor bronze, one connected to both ends of the heating coil 1 and receiving power from an inverter circuit (not shown). The details are composed of a screw hole 3a for fixing a cable terminal for supplying power from the inverter circuit with a screw, and a caulking portion 3b for caulking the coil conductor 2 of the heating coil 1 to form a storage portion 21 to be described later. The caulking portion 3b has one end side 32b, the other end side 32c, and a U-shaped portion 32a serving as a bent portion. Further, one or two cuts 32d are provided in the bent portion (U-shaped portion 32a) (in FIG. 3, the cuts 32d are provided in two opposite positions).
接続端子３は、コイル導線２の先端部より若干内側部を保持する収納部２１を備えている。収納部２１は、収納部２１の厚さ４１を保てるように、接続端子３の一端側３２ｂを収納部２１の内側に折り返し、コイル導線２の素線１１を略二段に整列して囲むように平らに形成（平形状２２）するものである。そして、曲げ部（Ｕ字部３２ａ）に切り込み３２ｄを設けることで、弱い力で、常に同じ位置で曲げられる利点がある。また、曲げ部（Ｕ字部３２ａ）が弱くなることで、曲げ部（Ｕ字部３２ａ）で折れ難くなり曲げ部（Ｕ字部３２ａ）をＲ形状に整形し易くなる。さらに、収納部２１を長手方向に平行に形成し易くなり、コイル導線２の素線１１を略二段に囲んで平らに形成され易い。 The connection terminal 3 includes a storage portion 21 that holds the inner portion slightly from the distal end portion of the coil conductor 2. The storage unit 21 is configured so that the one end side 32b of the connection terminal 3 is folded back inside the storage unit 21 so that the thickness 41 of the storage unit 21 can be maintained, and the strands 11 of the coil conductor 2 are aligned in substantially two stages. Are formed flat (flat shape 22). Then, by providing the notch 32d in the bent portion (U-shaped portion 32a), there is an advantage that it is always bent at the same position with a weak force. Further, since the bent portion (U-shaped portion 32a) becomes weak, it is difficult to bend at the bent portion (U-shaped portion 32a), and the bent portion (U-shaped portion 32a) is easily shaped into an R shape. Furthermore, it becomes easy to form the accommodating part 21 in parallel with the longitudinal direction, and it is easy to form flatly surrounding the strands 11 of the coil conductor 2 in substantially two steps.
この接続端子３の厚さは、素線１１の太さ（線径）に応じて異ならせるもので、この厚さは、素線１１を略二段に積み上げた時に固定できる程度の厚さ４１である。具体的に厚さ４１は、素線１１を二段に積み上げた時、二段目は一段目の素線１１間に落ち込み、またコイル導線２を適度な加圧で固定する必要があるので、収納部２１の狭い寸法（厚さ４１）は素線１１の線径の２倍の７０〜９０％とすることで適度な固定が可能となる。 The thickness of the connection terminal 3 varies depending on the thickness (wire diameter) of the strand 11, and this thickness is a thickness 41 that can be fixed when the strands 11 are stacked in approximately two stages. It is. Specifically, the thickness 41, when the strands 11 are stacked in two stages, the second stage falls between the first stage strands 11, and the coil conductor 2 needs to be fixed with appropriate pressure. When the narrow dimension (thickness 41) of the storage portion 21 is set to 70 to 90%, which is twice the wire diameter of the element wire 11, appropriate fixing can be performed.
接続端子３の板厚を前記厚さ４１と略同じにして、接続端子３の一端側３２ｂを収納部２１の内側に折り返し、この折り返した端面を基準にしてコイル導線２の素線１１が略２段となるように固定することで、コイル導線２を規定の厚さに包み形成することができる。そのため、コイル導線２の素線１１の太さ（線径）と接続端子３の板厚は密接な関係を持っている。 The plate thickness of the connection terminal 3 is made substantially the same as the thickness 41, the one end 32b of the connection terminal 3 is folded back inside the storage portion 21, and the element wire 11 of the coil conductor 2 is substantially made with reference to the folded end surface. By fixing so as to be two stages, the coil conductor 2 can be wrapped and formed in a prescribed thickness. Therefore, the thickness (wire diameter) of the strand 11 of the coil conductor 2 and the plate thickness of the connection terminal 3 are closely related.
また、接続端子３の一端側３２ｂを収納部２１の内側に折り返す量は、接続端子３の板厚と略同じとすることで、収納部２１の平たん部外側を、ヒュージング溶接（または抵抗溶接）の電極３３によって保持して電流３１を流した時に、一端側３２ｂの折り返し側に流れる電流３１とＵ字状に曲げられたＵ字部３２ａに略均等に電流３１を流すことができるので発熱の不均衡も無くなる。 Further, the amount by which the one end side 32b of the connection terminal 3 is folded back to the inside of the storage portion 21 is substantially the same as the plate thickness of the connection terminal 3, so that the flat portion outside of the storage portion 21 is subjected to fusing welding (or resistance). When the current 31 is flowed while being held by the electrode 33 of the welding), the current 31 can flow substantially evenly through the current 31 flowing on the folded side of the one end side 32b and the U-shaped portion 32a bent in a U-shape. There is no imbalance of heat generation.
さらに、素線１１を略二段にしたコイル導線２を収納部２１で巻くことで、コイル導線２を構成している十本から数百本の素線の全てが収納部２１と接する構成としている。 Further, by winding the coil conductor 2 in which the strands 11 are substantially in two stages in the storage portion 21, all of the ten to several hundred strands constituting the coil conductor 2 are in contact with the storage portion 21. Yes.
収納部２１の内側に折り返した一端側３２ｂに対して、他端側３２ｃは一端側３２ｂの外側に存在する構成としている。 The other end side 32c is configured to exist on the outer side of the one end side 32b with respect to the one end side 32b folded back inside the storage portion 21.
次に本実施の形態における接続方法の例を詳細に説明する。 Next, an example of a connection method in the present embodiment will be described in detail.
初めに図６を用いて第一の接続方法について説明する。 First, the first connection method will be described with reference to FIG.
第一の接続方法は、図６（ａ）に示すように、収納部２１より先端部を露出したコイル導線２を収納部２１にて固定する。固定は専用の工具を使用しても良いし、ヒュージング溶接（または抵抗溶接）の電極３３で挟むことでも良い。収納部２１は内側に折り返し部となる一端側３２ｂが設けられているので、固定時に専用の型を必要とする事無く、無用な圧力を素線１１に加える事無く、容易に確実に固定することができる。次に（ｂ）に示すように、収納部２１をヒュージング溶接（または抵抗溶接）の電極３３で挟み加圧通電を行い溶接する。次に（ｃ）に示すように、コイル導線２の先端側２ａと収納部２１を挟んだコイル側２ｂの絶縁被膜１３を非接触にて加熱除去したのち、（ｄ）に示すように、コイル導線２の先端側２ａと収納部２１、収納部２１とコイル側２ｂを半田２３付けする構成としている。 In the first connection method, as shown in FIG. 6A, the coil conductor 2 with the tip portion exposed from the storage portion 21 is fixed by the storage portion 21. The fixing may be performed using a dedicated tool or may be sandwiched between electrodes 33 of fusing welding (or resistance welding). Since the storage portion 21 is provided with one end side 32b serving as a folded portion on the inner side, it is easily and securely fixed without requiring a dedicated mold for fixing and without applying unnecessary pressure to the element wire 11. be able to. Next, as shown in (b), the accommodating portion 21 is sandwiched between electrodes 33 of fusing welding (or resistance welding), and energized under pressure to be welded. Next, as shown in (c), the insulating coating 13 on the coil side 2b sandwiching the front end side 2a of the coil conductor 2 and the storage portion 21 is removed by heating in a non-contact manner, and then, as shown in (d), the coil The distal end side 2 a of the conducting wire 2 and the storage portion 21, and the storage portion 21 and the coil side 2 b are soldered 23.
絶縁皮膜１３（自己融着被膜１４を含む）の除去方法は、加熱することで剥離する方法や薬品により剥離する方法、機械的（金属ブラシなど）に剥離する方法がある。本実施では特定波長（１０．５〜１０．７μｍ）のレーザー光線を使用して絶縁被膜１３のみを加熱して絶縁皮膜１３を剥離している。そのため、線材となるアルミ線１２を過加熱する事がない。なお、絶縁皮膜１３を取り除いた素線１１の表面には絶縁皮膜１３の溶融物もしくは炭化物が残留するため、エアーブローや機械的（金属ブラシ）剥離を部分的に併用するとよい。 As a method of removing the insulating film 13 (including the self-bonding film 14), there are a method of peeling by heating, a method of peeling with a chemical, and a method of peeling mechanically (such as a metal brush). In this embodiment, the insulating film 13 is peeled off by heating only the insulating film 13 using a laser beam having a specific wavelength (10.5 to 10.7 μm). For this reason, the aluminum wire 12 serving as a wire is not overheated. In addition, since the melt or carbide | carbonized_material of the insulating film 13 remains on the surface of the strand 11 which removed the insulating film 13, it is good to use air blow and mechanical (metal brush) peeling partially together.
接続端子３の収納部２１においては、前述したように素線１１を略二段の平形状２２で収納部２１に固定することで、コイル導線２を構成している十本から数百本の素線１１の全数が収納部２１に接することになる。コイル導線２の素線１１間の陰に隠れる素線１１は存在しないので、コイル導線２を収納部２１に固定した後に、レーザー光線を使用して絶縁被膜１３を剥離する時も、確実に全数の素線１１の絶縁被膜１３を剥離することが可能となり、素線１１全数と接続端子３の収納部２１を確実に半田２３付けが可能となり、電気的に素線１１全数を接続端子３と接続できる。 In the storage portion 21 of the connection terminal 3, as described above, the strand 11 is fixed to the storage portion 21 with a substantially two-stage flat shape 22, whereby ten to several hundreds constituting the coil conductor 2 are formed. All the strands 11 are in contact with the storage portion 21. Since there is no element wire 11 hidden behind the element wire 11 of the coil conductor wire 2, even when the insulating coating 13 is peeled off using a laser beam after the coil conductor wire 2 is fixed to the storage portion 21, the total number of the conductor wires 11 is surely reduced. It becomes possible to peel off the insulating coating 13 of the strands 11, and it is possible to reliably solder the entire number of the strands 11 and the storage portions 21 of the connection terminals 3, and electrically connect the total number of the strands 11 to the connection terminals 3. it can.
また、絶縁被膜１３の除去はレーザー光線の当たる箇所のみ剥離されるため、二段に整列されたコイル導線２の線（一段目）と線（二段目）の合わさった面（レーザー光線の当たらない箇所）は絶縁被膜１３を残し、コイル導線２の先端側２ａの素線１１全数と収納部２１とコイル側２ｂの素線１１全数を半田２３付けしている。 Further, since the insulating coating 13 is removed only at the place where the laser beam hits, the surface of the coil conductor wire 2 aligned in two steps (the first step) and the surface where the wire (the second step) meets (the place where the laser beam does not hit) ) Leaves the insulating coating 13 and solders 23 all the strands 11 on the distal end side 2a of the coil conductor 2 and all the strands 11 on the storage portion 21 and the coil side 2b.
次に第二の接続方法について図７を用いて説明する。 Next, the second connection method will be described with reference to FIG.
説明は、第一の接続方法と異なる点のみを説明する。第二の接続方法は、事前に収納部２１に収納されるコイル導線２の先端部２ｃの絶縁皮膜１３を除去（除去方法は第一の接続方法で述べた各方法）した後、接続端子３の収納部２１にコイル導線２を固定（図７（ａ），（ｂ））するものである。固定後はヒュージング溶接または抵抗溶接の電極３３にて収納部２１を加圧形成し（図７（ｃ），（ｄ））、コイル導線２の先端側２ａと収納部２１とコイル側２ｂを半田２３付け（図７（ｅ））する構成としている。 In the description, only points different from the first connection method will be described. In the second connection method, the insulating film 13 on the tip 2c of the coil conductor 2 stored in the storage unit 21 is removed in advance (the removal method is each method described in the first connection method), and then the connection terminal 3 The coil conductor 2 is fixed to the storage portion 21 (FIGS. 7A and 7B). After fixing, the housing part 21 is formed under pressure by fusing welding or resistance welding electrodes 33 (FIGS. 7 (c) and 7 (d)), and the distal end side 2a, the housing part 21 and the coil side 2b of the coil conductor 2 are connected. Solder 23 is attached (FIG. 7E).
また、図示していないが、接続端子３にコイル導線２を加締めて固定する必要は無く、例えば加締め部３ｂを曲げる前に、加締め部３ｂにコイル導線２の素線１１を一段に並べて、コイル導線２の先端側２ａと収納部２１、収納部２１とコイル側２ｂを半田２３付けした状態でも良く、またその後に加締め部３ｂを曲げて使用しても良い。 Although not shown, it is not necessary to crimp and fix the coil conductor 2 to the connection terminal 3. For example, before bending the crimping portion 3b, the strands 11 of the coil conductor 2 are placed on the crimping portion 3b in one step. The coil conductor 2 may be placed in a state in which the distal end side 2a of the coil conductor 2 and the storage portion 21, and the storage portion 21 and the coil side 2b are soldered 23, or the crimping portion 3b may be bent thereafter.
次にコイル導線の成形について図８を用いて説明する。 Next, the forming of the coil conductor will be described with reference to FIG.
説明は前記第一及び第二の接続方法、いずれの場合においても適用できる。アルミニウム素材を半田付けする場合の課題として、アルミニウム表面に生成される酸化被膜の除去がある。酸化被膜を除去しながら半田付けを行なう方法として、フラックスにより酸化被膜を洗浄し、半田付けを行なうものがある。しかし、フラックスを使用した場合、フラックスが加熱・蒸発する際、気泡が発生しやすく、半田付け部にボイドなどの欠陥や、フラックスが炭化し、異物として残るなどの課題があるため、近年はフラックスレス化が進んでいる。 The description can be applied to the first and second connection methods. A problem in soldering an aluminum material is removal of an oxide film formed on the aluminum surface. As a method of performing soldering while removing the oxide film, there is a method in which the oxide film is washed with a flux and soldered. However, when the flux is used, bubbles tend to be generated when the flux is heated and evaporated, and there are problems such as voids in the soldering part and carbonization of the flux, leaving it as foreign matter. Less is progressing.
フラックスを用いず、酸化被膜を除去し、半田付けする方法として超音波振動を用いた方法がある。これは超音波振動によるキャビテーション効果により金属表面の酸化被膜を機械的に破壊するもので、その他、金属と半田の合金化を促進したり、金属表面と半田の間にある気泡を除去する脱泡効果や、半田を浸透促進させる効果も確認されている。 There is a method using ultrasonic vibration as a method of removing the oxide film and soldering without using the flux. This mechanically destroys the oxide film on the metal surface due to the cavitation effect caused by ultrasonic vibration. In addition, the defoaming promotes alloying of the metal and solder, or removes bubbles between the metal surface and the solder. The effect and the effect of promoting penetration of solder have also been confirmed.
しかし、一般に超音波の強さは距離の３乗に反比例することが知られている。（ａ）のように略０．２〜０．４ｍｍのアルミ導線をより合せたものに超音波を用いた半田付けを行なった場合、超音波発生源に近い外側の円筒頂点部分は超音波振動を受けられるが、隣り合うアルミ線同士の略三角形の凹空間には、超音波振動は届きにくくなり、結果、酸化被膜が破壊できず、アルミ導線の外側の円筒頂点でのみ半田付けされる。より広い面積で半田付けをするため、超音波振動を強くした場合、アルミ導線の表面が超音波振動により浸食され、アルミ導線が無くなってしまう。 However, it is generally known that the intensity of ultrasonic waves is inversely proportional to the cube of the distance. When soldering using ultrasonic waves is performed on a combination of approximately 0.2 to 0.4 mm aluminum conductors as in (a), the outer cylindrical apex near the ultrasonic wave generation source is ultrasonic vibration. However, it is difficult for ultrasonic vibration to reach the substantially triangular concave space between adjacent aluminum wires, and as a result, the oxide film cannot be destroyed and soldered only at the cylindrical apex outside the aluminum conductor. When ultrasonic vibration is strengthened for soldering in a wider area, the surface of the aluminum conductor is eroded by the ultrasonic vibration, and the aluminum conductor is lost.
そのため半田付けする面積を広くし、超音波振動を効果的に受けるため、（ｂ）のようにアルミ導線の表面を成形型３４で略平面状に成形することで、略平面状のアルミ導線の表面に均等に超音波振動が伝わり、表面全体で半田付けを行なうことができるようになる。 Therefore, in order to increase the soldering area and effectively receive ultrasonic vibration, the surface of the aluminum conductor is formed into a substantially flat shape by the forming die 34 as shown in FIG. Ultrasonic vibration is uniformly transmitted to the surface, and soldering can be performed on the entire surface.
また、略平面部の狭い方の寸法を前記収納部内のアルミ導線の狭い方の寸法とほぼ同一にすることで、アルミ導線と接続端子を均等に半田付けすることができる。 In addition, by making the narrow dimension of the substantially flat portion substantially the same as the narrow dimension of the aluminum conductor in the storage section, the aluminum conductor and the connection terminal can be soldered evenly.
図９は一実施例の誘導加熱用コイルの下面斜視図を示すもので、接続端子３はコイルベース４下面の端子台５に係止され、配線部はコイルベース４下面で係止される接続端子３と略同一面上に係止される構成としている。これは、接続端子３の収納部２１及びコイル導線２をヒュージング溶接または抵抗溶接の電極３３による通電、及び絶縁皮膜１３を剥離するときの加熱により絶縁皮膜１３の外周に設けられている自己融着皮膜１４にも、その熱が伝わり素線１１同士を固着する。そのため固着したコイル導線２は硬化した形態となり、配線のための曲げ加工がしにくいため、接続端子３をコイルベース４の下面側にすることで、配線作業が少なくなるとともに、コイル導線２への負荷が減り、固着した素線１１同士が分離する際の絶縁皮膜１３の剥離防止にもなる。また、接続端子３とコイル導線２を電気的に接続する半田２３付け部にも負荷がかからず、安定した電気的な接続を維持することができる。 FIG. 9 is a bottom perspective view of the induction heating coil of one embodiment. The connection terminal 3 is locked to the terminal block 5 on the bottom surface of the coil base 4 and the wiring portion is connected to the bottom surface of the coil base 4. The terminal 3 is configured to be locked on substantially the same plane. This is because the housing portion 21 of the connection terminal 3 and the coil conductor 2 are energized by the fusing welding or resistance welding electrode 33 and heated when the insulating film 13 is peeled off, and the self-melting provided on the outer periphery of the insulating film 13. The heat is transmitted to the coating film 14 to fix the strands 11 together. For this reason, the fixed coil conductor 2 is hardened and is difficult to bend for wiring. By connecting the connection terminal 3 to the lower surface side of the coil base 4, wiring work is reduced and the coil conductor 2 is connected to the coil conductor 2. The load is reduced, and the insulation coating 13 is prevented from being peeled when the fixed strands 11 are separated from each other. Moreover, a load is not applied to the solder 23 attaching portion that electrically connects the connection terminal 3 and the coil conductor 2, and a stable electrical connection can be maintained.
なお、加熱コイル１は、コイルベース４に載置されるとともに接着によりコイルベース４に固定される。コイルベース４には接続端子３を取り付けるための端子台５がコイルベース４下面に設けている。コイルベース４と端子台５はＰＰＳ樹脂やＰＢＴ樹脂等のモールド加工により一体的に形成されている。 The heating coil 1 is placed on the coil base 4 and fixed to the coil base 4 by adhesion. The coil base 4 is provided with a terminal block 5 for attaching the connection terminal 3 on the lower surface of the coil base 4. The coil base 4 and the terminal block 5 are integrally formed by molding such as PPS resin or PBT resin.
上記した本実施例によれば、アルミ線を使用したコイル導線２と接続端子３との接続部において、信頼性が高く品質の安定した接続を提供することができる。
According to the present embodiment described above, it is possible to provide a highly reliable and stable connection at the connection portion between the coil conductor 2 using the aluminum wire and the connection terminal 3.
１ 加熱コイル
２ コイル導線
２ａ 先端側
２ｂ コイル側
３ 接続端子
４ コイルベース
５ 端子台
１１ 素線
１２ アルミ線
１３ 絶縁皮膜
１４ 自己融着皮膜
２１ 収納部
２２ 平形状
２３ 半田
３１ 電流
３２ 発熱
３３ 電極
３４ 成形型
４１ 厚さｔ
DESCRIPTION OF SYMBOLS 1 Heating coil 2 Coil conductor 2a Tip side 2b Coil side 3 Connection terminal 4 Coil base 5 Terminal block 11 Element wire 12 Aluminum wire 13 Insulating film 14 Self-bonding film 21 Storage part 22 Flat shape 23 Solder 31 Current 32 Heat generation 33 Electrode 34 Mold 41 Thickness t
Claims (3)
該コイル導線の両端側に電力の供給を受けるための接続端子とを備え、
該接続端子には、
前記コイル導線の前記素線を略二段に平形状に形成して加圧固定する収納部を設け、前記収納部の外側にある前記コイル導線を略平形状に成形し、
前記コイル導線の前記収納部への固定は、前記コイル導線の先端側を前記収納部より出し、前記コイル導線の前記先端側と前記収納部、前記コイル導線のコイル側と前記収納部とを半田付けによって電気的に接続したことを特徴とする誘導加熱用の加熱コイル。 A coil conductor formed by twisting a plurality of strands each having an insulation coating on an outer layer of an aluminum wire;
A connection terminal for receiving power supply at both ends of the coil conductor;
The connection terminal includes
Forming a storage portion for pressurizing and fixing the element wire of the coil conductor in a substantially flat shape in two steps, and forming the coil conductor outside the storage portion into a substantially flat shape;
The coil lead wire is fixed to the storage part by extending the tip end side of the coil lead wire from the storage part, and soldering the tip end side of the coil lead wire and the storage part, and the coil side of the coil lead wire and the storage part. A heating coil for induction heating, which is electrically connected by attaching.
該加熱コイルの上方に設けられ、被加熱物を載置するトッププレートと、
前記加熱コイルに電力を供給するインバータ回路とを具備することを特徴とする誘導加熱調理器。 The heating coil according to claim 1 or 2,
A top plate that is provided above the heating coil and on which an object to be heated is placed;
An induction heating cooker comprising an inverter circuit for supplying electric power to the heating coil.
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| JP2020079471A (en) * | 2018-11-12 | 2020-05-28 | 林撚糸株式会社 | Fabric containing soldering part |
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| JPH07100054A (en) * | 1993-10-08 | 1995-04-18 | Toshiba Home Technol Corp | Rice cooker |
| WO1995022239A1 (en) * | 1994-02-09 | 1995-08-17 | Induced Energy Ltd. | Induction heating element |
| JPH1050217A (en) * | 1996-08-06 | 1998-02-20 | Hitachi Ltd | Deflection yoke device and manufacture thereof |
| JPH11224767A (en) * | 1998-02-04 | 1999-08-17 | Toshiba Corp | Induction heating cooking appliance |
| JP2013251169A (en) * | 2012-06-01 | 2013-12-12 | Panasonic Corp | Induction heating coil |
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|---|---|---|---|---|
| JPH07100054A (en) * | 1993-10-08 | 1995-04-18 | Toshiba Home Technol Corp | Rice cooker |
| WO1995022239A1 (en) * | 1994-02-09 | 1995-08-17 | Induced Energy Ltd. | Induction heating element |
| JPH1050217A (en) * | 1996-08-06 | 1998-02-20 | Hitachi Ltd | Deflection yoke device and manufacture thereof |
| JPH11224767A (en) * | 1998-02-04 | 1999-08-17 | Toshiba Corp | Induction heating cooking appliance |
| JP2013251169A (en) * | 2012-06-01 | 2013-12-12 | Panasonic Corp | Induction heating coil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2020079471A (en) * | 2018-11-12 | 2020-05-28 | 林撚糸株式会社 | Fabric containing soldering part |
| JP7295555B2 (en) | 2018-11-12 | 2023-06-21 | 林撚糸株式会社 | Fabric containing soldered parts |
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