JP2004198095A

JP2004198095A - Electric heater

Info

Publication number: JP2004198095A
Application number: JP2002383507A
Authority: JP
Inventors: Yoshiji Sowa; 義司曽和
Original assignee: SOWA SENI KOGYO KK
Current assignee: SOWA SENI KOGYO KK
Priority date: 2002-12-19
Filing date: 2002-12-19
Publication date: 2004-07-15

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric heater with reduced cost, reduced number of cord cores, and easy handling by minimizing the number of connection pins and simplifying connection between a body side and a controller for temperature control in an electric heater provided with a controller for temperature control which is separate from a body such as an electric blanket. <P>SOLUTION: In the electric heater, a body plug is provided with a three pole terminal mold integrally formed by synthetic resin having electrical insulation in a state of connecting each end part of a first heating element wire, a second heating element wire, and a heat sensitive wire in one end of a heating wire to respective pins. The body plug is provided with a one pole terminal mold integrally formed by synthetic resin having electrical insulation in a state of carrying out short circuit connection of other ends of the first heating element wire and the second heating element wire in another end of the heating wire, and connecting another end of the heat sensitive wire to a pin. A connector of the temperature control controller is composed of a four pole pin. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【産業上の利用分野】
本発明は、電気カーペット、電気毛布等のコードの中間部に温度調節用コントローラーを設けた電気暖房器具に関する。
【０００２】
【従来の技術】
最近、電気毛布、電気カーペット、足暖器等の身体に近く、また、比較的長時間利用される電気製品について、磁気や電場による身体への悪影響を回避する等、温度制御による安全性のみならず、健康面に配慮した種々の提案がなされている。
【０００３】
上記磁気の影響を回避するための一手段として、最近、一般化されてきているのが消磁効果を発揮する発熱体であって、これは、２本の発熱素線を同心状に巻回させ、これに逆向きの電流を流すことによって磁気を相殺させることができる構成となっている。
実際の使用に際しては、温度制御を行うための感熱線（センサー線）がやはり同心状に巻回されるところから、１本の発熱線としては、３線巻きという構造になる。現在では、こうした３線巻きの発熱線の電気毛布等が主流となっている。
【０００４】
ところで、こうした電気カーペット等にあっては、通常、温度調節用コントローラー３を備えるが、図２０に示すように、発熱線２を内蔵した電気カーペット本体１に一体的に備え、そこにコネクターを設けて、差込プラグ５を有する電源コード４を差し込むタイプと、カーペット本体とは別体とし、電気カーペット側に備えたコネクターに対して温度調節用コントローラーを着脱するコネクターを備える方式が採られている。
【０００５】
前者、即ち、温度調節用コントローラー３をカーペット本体１に一体的に備える場合は、これを洗濯機に投入して丸洗いするとコンとローラー３のソケットから内部に水が侵入し、使用に際して危険であるという問題がある。
従って、最近の一般の電気カーペット等は、丸洗い洗濯が可能なように、温度調節用コントローラーをカーペット本体と別体として、着脱する方式を採用している。
【０００６】
【発明が解決しようとする課題】
そこで、温度調節用コントローラーをカーペット本体と別体として、カーペット本体側からコネクターピン（シールされている）を出し、別体の温度調節用コントローラーに差し込む方式を採用するに、上述の３線巻きの発熱線では、通常の設計に基づけば、例えば、図２１に示すように、２本の発熱素線の端子４本と、感熱線の端子２本の合計６極のコネクターピンのコネクター１６が必要となる。このことは、コネクター自体も大型化するが、電源コード１９としても６線構造となって、太く、曲がり難くなり、カーペット等の使用に際して取り扱い上不都合である。
【０００７】
本発明は、かかる問題に鑑み、温度制御用コントローラーを電気毛布等の本体と別体に設けた電気暖房器具において、本体側と温度制御用コントローラーとの接続を接続ピンを極力減らした簡潔なものとして、コスト削減と、コード芯の本数を減らした取り扱い容易な電気暖房器具を提供することを目的とする。
【０００８】
【課題を解決するための手段】
本発明にかかる電気暖房器具は、上記目的を達成するために、第１発熱素線、第２発熱素線、感熱線を、ほぼ同心状に互いに絶縁状態で巻き付けて１本の発熱線を構成し、この発熱線を電気暖房器具の本体に配線し、この発熱線に本体プラグを接続し、該本体プラグに対して、電源コードを備えた温度制御コントローラーのコネクーを着脱自在に接続してなる電気暖房器具において、前記本体プラグにおいて、前記発熱線の一端における第１発熱素線、第２発熱素線、感熱線のそれぞれの端部を、それぞれのピンに接続した状態で、電気的絶縁性を有する合成樹脂で一体成形した３極端末モールドを設け、且つ、前記本体プラグにおいて、前記発熱線の他端における第１発熱素線及び第２発熱素線の他端を短絡接続し、感熱線の他端をピンに接続した状態で、電気的絶縁性を有する合成樹脂で一体成形した１極端末モールドを設け、前記温度制御コントローラーのコネクターを４極ピンのコネクターに構成してある、という手段を講じたものである。
【０００９】
【発明の実施の態様】
本発明において、前記発熱線の他方の端の感熱線の端末と、発熱線の中心線とほぼ同一線上に設けた残りの１本のピンを電気的に接続し、第１発熱線と第２発熱線の他方の端は、発熱線の中心線とほぼ同一線上で電気的に接続し、これら全体を樹脂材料でなるモールドで一体成形したものが好ましい。
【００１０】
また、前記第１発熱素線が最内側に位置し、第２発熱素線がその外側に位置し、感熱線が最外側に位置するのが好ましい。
請求項１の電気暖房器具。
【００１１】
更に、前記感熱線が最内側に位置し、第１発熱素線がその外側に位置し、第２発熱素線が最外側に位置するのが好ましい。
【００１２】
更に、前記第１発熱素線が最内側に位置し、感熱線がその外側に位置し、第２発熱素線が最外側に位置するのが好ましい。この構造については、実施例において図示説明を行っていないが、こうような３線巻きの発熱線の構造は、既に公知のものであり、詳述するのを省いた。
【００１３】
【実施例】
以下、本発明にかかる電気暖房器具の好適実施例について、図面を参照して詳述する。
図１において、１３は、繊維でなる電気毛布生地であり、１４は、電気毛布生地１３内に千鳥状に配線された発熱線である。１５は、前記発熱線１４と電気的に接続する本体プラグであり、１６は、この本体プラグ１５に着脱自在に電気的に接続できるコネクターである。１７は、温度調節用コントローラーであり、１８は、差込プラグであって、１９は、前記差込プラグ１８とコントローラー１７とを接続する電源コードであり、２０は、前記コントローラー１７と前記コネクター１６とを接続する４芯コードである。図２は、前記本体プラグ１５とコネクター１６の部分の拡大図であり、図３は、前記本体プラグ１５の背面図であって、５４は、後に言及するねじである。
【００１４】
図４に基づいて発熱線１４の構造を説明する。６は、テトロン等の芯糸であり、７は、芯糸６の周りにつる巻き状に巻かれた金属線でなる第１発熱素線であり、８は、第１発熱素線７と第２発熱素線９間を電気的に絶縁するポリエチレンフタレート等の樹脂材料でなる発熱素線用絶縁物である。９は、前記発熱素線用絶縁物８の上から巻かれた金属線でなる第２発熱素線であり、１０は、第２発熱素線９と感熱線１１間を絶縁する感温層であり、ナイロン等の樹脂材料で構成されており、雰囲気温度が上昇して溶解温度に達すると溶解し、第２発熱素線９と感温線１１とを短絡する機能を具備している。１１は、感温層１０の上につる巻き状に巻かれたニッケル線等の正の抵抗温度係数を有する金属線でなる感熱線であって、正の温度抵抗変化をする性質を有している。１２は、前記感熱線１１の上から塩化ビニル等の合成樹脂材料でチュービング被覆された外皮である。
【００１５】
図６は、上記発熱線１４の別の態様、即ち、前記第１発熱素線、第２発熱素線及び感熱線の配置が異なるものを示す。
２１は、テトロン等の芯糸であり、２２は、芯糸の周りにつる巻き状に巻かれた金属線でなる感熱線であって、正の温度抵抗変化をする性質を有している。２３は、第１発熱素線２４と感温線２２間を絶縁する感温層であって、ナイロン等の樹脂材料で構成されており、雰囲気温度が上昇し、溶解温度に達すると溶解し、第１発熱素線２４と感熱線２２とを短絡する機能を具備している。２４は、感温層２３の上に巻かれた金属線でなる第１発熱素線であり、２５は、第１発熱素線２４と第２発熱素線２６間を電気的に絶縁するポリエチレンフタレート等の樹脂材料でなる発熱素線用絶縁物である。２６は、発熱素線用絶縁物２５の上から巻かれた金属線でなる第２発熱素線であり、２７は、感熱線２２の上から塩化ビニル等の合成樹脂材料でチュービング被覆された外皮である。
【００１６】
図６に基づいて、前記発熱線１４（ここでは、図４の構造のものについて）について説明する。前記発熱線１４の第１発熱素線７と電気的に接続するカシメ部２９を有する金属製の第１発熱素線ピン２８と、発熱線１４の第２発熱素線９と電気的に接続するカシメ部３１を有する金属製の発熱素線ピン３０と、発熱線１４の感熱線１１と電気的に接続するカシメ部３３を有する金属製の感熱線ピン３２とを一定の間隔で並べて、ナイロン、塩化ビニル、ポリエチレン等の電気的絶縁性を有する樹脂材料でモールド加工した３極端末モールド３４であって、一体成形されている。
【００１７】
図７乃至図１１を用いて前記発熱線１４の他方の端末部の構造について説明する。前記発熱線１４の中心線とほぼ同一線上で、第１発熱素線７と第２発熱素線９とを短絡するように巻き込み、銅パイプ等の金属パイプ３５を前記巻き込んだところに入れて上からカシメる。３６は、樹脂材料でなる熱収縮絶縁チューブであり、前記カシメた金属パイプ３５やその周辺に被せ、加熱して収縮され、第１発熱素線７、第２発熱素線９、感熱線１１間を絶縁する。３７は、カシメ部３８や、かかえ部３９を有する感熱線ピンであり、カシメ部３８で感熱線１１をカシメ、電気的に接続するとともに、かかえ部３９で発熱線１４の外皮１２をかかえ、感熱線ピン３７と発熱線１４とを互いに固定する。この場合、感熱線ピン３７は、発熱線１４の中心線と略同一線上に設ける。５１は、ナイロン、塩化ビニル、ポリエチレン等の電気的絶縁性を有する樹脂材料でモールド加工した１極端末モールドで、一体成形する。
【００１８】
次に、図１２に基づき、図５の発熱線１４（感熱線２２が中心に位置する構造）の場合について説明する。
発熱線１４の一方の端末部の構造は、発熱線１４の感熱線２２と電気的に接続するカシメ部４２を有する金属製の感熱線ピン４１と、発熱線１４の第１発熱素線２４と電気的に接続するカシメ部４４を有する金属製の発熱素線ピン４３と、発熱線１４の第２発熱素線２６と電気的に接続するカシメ部４６を有する金属製の発熱素線ピン４５とを一定の間隔で並列に並べ、ナイロン、塩化ビニル、ポリエチレン等の電気的絶縁性を有する樹脂材料でモールド加工した３極端末モールド４７であって、一体成形されている。
【００１９】
次いで、図１３乃至図１６に基づき、前記発熱線１４の他方の端末部の構造について説明する。
４８は、カシメ部４９を有する感熱線ピンであり、発熱線１４の中心線とほぼ同一線上で、カシメ部４９で感熱素２２をカシメて電気的に接続する。前記発熱線１４の中心線とほぼ同一線上で、第１発熱素線２４と第２発熱素線２６とを短絡するように巻き込み、銅パイプ等の金属パイプ５０を前記巻き込んだところに入れて上からカシメる。この時、感熱線２２と第１発熱素線２４、第２発熱素線２６及び金属パイプ５０は、互いに電気的に絶縁されている状態に仕上げる。４０は、ナイロン、塩化ビニル、ポリエチレン等の電気的絶縁性を有する樹脂材料でモールド加工した１極端末モールドであって、一体成形されている。
【００２０】
次いで、図１７及び図１８に基づいて、本体プラグ１５の構造について説明する。
３極端末モールド３４と、１極端末モールド４０を図示の如く組み合わせ、３極端末モールド３４の発熱素線ピン２８、発熱素線ピン３０、感熱線ピン３２及び１極端末モールド４０の感熱線ピン３７を樹脂製の仕切り板５２で支え、樹脂製の上本体ケース５１と下本体ケース５３で、電気毛布生地１３の端と３極端末モールド３４、１極端末モールド４０を挟み込み、ねじ５４で上本体ケース５１と下本体ケース５３を固定して構成してある。
【００２１】
次に、コネクター１６の構造について、図１７に基づき説明する。本体プラグ１５の発熱線ピン２８，３０、感熱線ピン３２，３７と対向するところに、金属製のピン受け５５を設け、それぞれのピン受け５５は、４芯コード２０の各線芯と電気的に接続されている。５６は、ピン受け５５の外周を構成する樹脂製のケースであって、５７は、コードプロテクターである。
【００２２】
更に、図１９に基づいて、電気回路に関して説明する。５８は、サイリスターであり、第１発熱素線７と第２発熱素線９と直列に接続する。５９は、オペアンプであり、このオペアンプ５９の＋側は、ダイオード６０、抵抗６１、抵抗６２、ダイオード６３の直列回路の、抵抗６１、抵抗６２の中点に接続される。オペアンプの−側は、抵抗６４、感熱線１１、ダイオード６８、抵抗６５、抵抗６６、ダイオード６３の直列回路の、抵抗６５と抵抗６６の中点に接続される。オペアンプ５９の出力側は、ダイオード６７を介してサイリスター５８のゲートに接続される。オペアンプの＋側に繋がる回路と、−側に繋がる回路は並列接続されている。７０は、電源回路に入れられた温度ヒューズであり、６９は前記温度ヒューズ７０を加熱する抵抗である。この抵抗６９は、サイリスター５８や感温層１０と並列に接続される。１８は、差込プラグを示す。
【００２３】
次に、本制御回路の作用について説明する。
差込プラグ１８を交流電源に接続すると、オペアンプ５９のプラス側には抵抗６１，６２で分圧された一定の電圧が加わることになる。一方、オペアンプ５９のマイナス側には、抵抗６４、感熱線１１、抵抗６５の合成抵抗と抵抗６６で分圧された電圧が加わる。この場合、抵抗６４、感熱線１１、抵抗６５の合成抵抗と抵抗６６のそれぞれの抵抗値を、オペアンプ５９のプラス側の電圧よりマイナス側の電圧が高くなるように設定している。このため、オペアンプ５９から信号が交流の１周波毎にサイリスター５８のゲートに出され、サイリスター５８が導通して、第１発熱素線７及び第２発熱素線９に電流がながれて発熱し、電気毛布記事１３が暖まる。
【００２４】
そして、電気毛布生地１３の温度が上昇すると、感熱線１１は、ニッケル線等の正の抵抗温度係数を有する金属線で構成されているために、抵抗値が上昇することになる。このことにより、抵抗６４、感熱線１１、抵抗６５の合成抵抗値が上昇し、これらの御旺盛抵抗に加わる電圧が上昇し、その結果、抵抗６６に加わる電圧が下がり、オペアンプ５９に加わっているプラス側の一定電圧よりも、マイナス側に加わっている電圧の方が小さくなる。このことにより、オペアンプ５９からサイリスター５８のゲートに信号が発信されなくなり、サイリスター５８が導通しなくなる。この結果、第１発熱素線７、第２発熱素線９に導通されず、発熱が止まる。
【００２５】
また、電気毛布生地１３の温度が下がってくると、感熱線１１の抵抗値がちいさくなってくる。その抵抗値が小さくなると、抵抗６４、感熱線１１、抵抗６５の合成抵抗値に加わる電圧もちいさくなり、抵抗６６に加わる電圧がおおきくなって、オペアンプ５９のマイナス側の電圧がプラス側の一定電圧よりも高くなり、オペアンプ５９より信号がサイリスター５８のゲートに入り、サイリスター５８が導通する。このことによって、第１発熱素線７と第２発熱素線９に通電して発熱し、電気毛布記事１３を暖める。上記動作を繰り返して一定の温度に維持している。
【００２６】
次に、最終安全機能の動作について説明する。オペアンプ５９が故障したり、サイリスター５８が故障したり、又は局所的に発熱線１４が折り重なったりしたときには、発熱線１４の温度が異常に上昇するため、発熱線１４の感温層１０が熔けて、第１発熱素線７若しくは第２発熱素線９と感熱線１１が短絡する。その結果、差込プラグ１８、第１発熱素線７若しくは第２発熱素線９、感熱線１１、抵抗６９、温度ヒューズ７０、差込プラグ１８の回路に電流が流れ、抵抗６９が発熱して、温度ヒューズ７０を熔断し、回路を遮断する。これによって、電気毛布記事１３が燃えるのを未然に防止する。
【００２７】
上記の実施例により、次ぎの作用効果が得られる。
（１）過去気毛布の本体と差込プラグ間を接続するコードの中間部に、温度調節用コントローラーを設けた電気暖房器において、本体に、第１発熱素線と第２発熱素線及び感熱線を有する１本の発熱線を配置し、本体に設けた本体プラグの中で、第１発熱素線と第２発熱素線の、一方の端を短絡し、第１発熱素線と第２発熱素線の、他方の端は一対の発熱素線ピンに接続し、感熱線の両端は一対の関越線ピンに接続し、前記発熱素線ピンと感熱線ピンはコネクターの４極のピン受けに着脱自在に接続し、ピン受けは４芯コードを介してコードの中間部に設けた温度調節用コントローラーに電気的に接続される構造のため、発熱線の第１発熱素線、第２発熱素線と感熱線の両端６本のうち、本体プラグ内で２本を短絡していることになり、残り４本だけを発熱素線ピン、ピン受け、４芯コードを使用して温度調節用コントローラーに接続していることになり、従来例のようにコントローラー内で第１発熱素線と第２発熱素線を接続する構造のものと比べて、発熱素線ピンの数やピン受けの数を４個にでき、本体プラグやコネクターの形状を小型で異物感のない取り扱い易いものに出来る。また、コードも４芯のものが使用できるため、嵩張らず、取り扱い易い。
【００２８】
（２）発熱線の一端に第１発熱素線と接続した発熱素線ピン、第２発熱素線と接続した発熱素線ピンと、感熱線と接続した感熱線ピンを設け、樹脂材料でモールド加工した３極端末モールドで一体に構成し、発熱線の片方の端は、第１発熱素線と第２発熱素線を短絡し、感熱線と接続した感熱線ピンを設け、第１発熱素線、第２発熱素線と、感熱線ピンを絶縁した状態で且つ樹脂材料でモールド加工した１極端末モールドで一体に構成しているため、発熱素線の端末の短絡を、別途行いモールドするのに比べ、発熱線の端末が３極端末モールドと１極端末モールドの２部品でバラけないように纏めることが出来て、電気毛布生地への発熱線の配線時の作業が行い易くなる。
【００２９】
（３）第１発熱素線と第２発熱素線の短絡を、発熱線の中心線上で金属パイプのカシメ等で接続し、感熱線ピンを発熱線の中心線と略同一線上に配置して、１極端末モールドを構成しているため、第１発熱素線と第２発熱素線の短絡部と感熱線の中心線がズレたものと比べて、１極端末モールドを極めて小さく構成することが出来、本体プラグを小型にすることができる。
【００３０】
（４）第１発熱素線と第２発熱素線の短絡箇所と、感熱線ピンを１極端末モールドの中で行っているために、第１発熱素線と第２発熱素線の短絡作業不良で、短絡部が十分にカシメられず、使用中、短絡箇所に過熱が生じても、１極端末モールド内の発熱線の感温層が熔けて、感熱線と発熱素線が短絡し、回路を遮断するため、安全が確保できる。
【００３１】
【発明の効果】
本発明にかかる電気暖房器具によれば、温度制御用コントローラーを電気毛布等の本体と別体に設けた電気暖房器具において、本体側と温度制御用コントローラーとの接続を接続ピン（４本）を極力減らした全体として小型化でき、簡潔な構造のものとして、コスト削減と、コード芯（電源コード及び房器具本体とコントローラーとの接続用）の本数を減らした曲がり易い取り扱い容易な電気暖房器具を提供出来るに至ったものである。
【００３２】
第１発熱素線と第２発熱素線の短絡を、発熱線の中心線とほぼ同一線上で接続し、感熱線ピンを発熱線の中心線とほぼ同一線上に配置して１極端末モールドを構成した場合には、第１発熱素線と第２発熱素線の短絡部と、感熱線ピンと発熱線の中心がずれたものに比べて、１極端末モールドをきわめて小さく構成することが出来て、本体プラグを小型化することが出来る利点がある。
また、本発明のその他の具体的構成による独特の効果は、上記発明の実施の態様の項及び実施例の説明の項において詳述した通りである。
【図面の簡単な説明】
【図１】本発明にかかる電気暖房器具の一実施例を示す電気毛布の全体の概略平面図である。
【図２】本発明にかかる電気暖房器具の一実施例を示す要部の拡大平面図である。
【図３】本発明にかかる電気暖房器具の一実施例を示す要部の拡大平面図である。
【図４】本発明にかかる電気暖房器具の一実施例を示す要部の一部断面側面図である。
【図５】本発明にかかる電気暖房器具の別の態様を示す要部の一部断面側面図である。
【図６】本発明にかかる電気暖房器具の一実施例を示す要部の拡大平面図である。
【図７】本発明にかかる電気暖房器具の一実施例を示す要部の側面図である。
【図８】本発明にかかる電気暖房器具の一実施例を示す要部の側面図である。
【図９】本発明にかかる電気暖房器具の一実施例を示す要部の側面図である。
【図１０】本発明にかかる電気暖房器具の一実施例を示す要部の側面図である。
【図１１】本発明にかかる電気暖房器具の一実施例を示す要部の側面図である。
【図１２】本発明にかかる電気暖房器具の一実施例を示す要部の拡大平面図である。
【図１３】本発明にかかる電気暖房器具の一実施例を示す要部の側面図である。
【図１４】本発明にかかる電気暖房器具の一実施例を示す要部の側面図である。
【図１５】本発明にかかる電気暖房器具の一実施例を示す要部の側面図である。
【図１６】本発明にかかる電気暖房器具の一実施例を示す要部の側面図である。
【図１７】本発明にかかる電気暖房器具の一実施例を示す要部の一部断面平面図である。
【図１８】本発明にかかる電気暖房器具の一実施例を示す要部の一部縦断側面図である。
［図１８］本発明にかかる電気暖房器具の一実施例を示す要部の一部縦断側面図である。
【図１９】本発明にかかる電気暖房器具の一実施例を示す回路図である。
【図２０】従来技術にかかる電気暖房器具の全体の平面図である。
【図２１】従来技術にかかる電気暖房器具の要部の一部断面平面図である。
【符号の説明】
７第１発熱素線
９第２発熱素線
１１感熱線
１４発熱線
１５本体プラグ
１６コネクター[0001]
[Industrial applications]
The present invention relates to an electric heating device provided with a temperature control controller in an intermediate portion of a cord such as an electric carpet or an electric blanket.
[0002]
[Prior art]
Recently, for electrical products that are close to the body, such as electric blankets, electric carpets, and foot warmers, and that are used for a relatively long time, if only safety by temperature control is required, such as avoiding adverse effects on the body due to magnetic or electric fields. Instead, various proposals have been made in consideration of health.
[0003]
As a means for avoiding the influence of the magnetism, a heating element that has recently been generalized is a heating element that exhibits a demagnetizing effect, which is formed by winding two heating element wires concentrically. By passing a current in the opposite direction, the magnetism can be canceled.
In actual use, since a heat-sensitive wire (sensor wire) for controlling temperature is also wound concentrically, one heat-generating wire has a three-wire winding structure. At present, electric blankets with such a three-wire wound heating wire are predominant.
[0004]
By the way, such an electric carpet or the like usually includes a temperature control controller 3, but as shown in FIG. 20, the electric carpet body 1 integrally includes a heating wire 2 and a connector is provided there. And a type in which a power cord 4 having an insertion plug 5 is inserted, and a method in which a connector for attaching and detaching a temperature control controller to and from a connector provided on the electric carpet side is provided separately from a carpet body. .
[0005]
In the former case, that is, when the temperature control controller 3 is integrally provided with the carpet body 1, if the temperature control controller 3 is put into a washing machine and washed in a round manner, water enters into the inside from the socket of the controller and the roller 3, which is dangerous when used. There is a problem.
Therefore, a recent general electric carpet or the like adopts a system in which a temperature controller is detached from a carpet body so as to be able to wash and wash the carpet.
[0006]
[Problems to be solved by the invention]
In order to adopt a method of taking out the connector pin (sealed) from the carpet body side and inserting the connector pin (sealed) from the carpet body side and inserting it into the separate temperature control controller, In the case of a heating wire, based on a normal design, for example, as shown in FIG. 21, a connector 16 having a total of 6-pin connector pins of four terminals of two heating wires and two terminals of a heat-sensitive wire is required. It becomes. This means that the connector itself becomes large, but the power cord 19 also has a six-wire structure, is thick and difficult to bend, and is inconvenient in handling when using a carpet or the like.
[0007]
The present invention has been made in view of the above problems, and in an electric heating appliance in which a temperature control controller is provided separately from a main body such as an electric blanket, a simple one in which connection pins between the main body and the temperature control controller are reduced as much as possible. SUMMARY OF THE INVENTION It is an object of the present invention to provide an easy-to-handle electric heater with reduced cost and a reduced number of cord cores.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the electric heating apparatus according to the present invention is configured such that a first heating wire, a second heating wire, and a heat sensing wire are wound concentrically and insulated from each other to form one heating wire. Then, the heating wire is wired to the main body of the electric heating appliance, a main body plug is connected to the heating wire, and a connector of a temperature control controller having a power cord is detachably connected to the main body plug. In the electric heating appliance, in the main body plug, the first heat generating wire, the second heat generating wire, and the heat-sensitive wire at one end of the heat-generating wire are electrically insulated in a state where they are connected to respective pins. Providing a three-pole terminal mold integrally molded with a synthetic resin having a heat-sensitive wire, and short-circuiting the other end of the first heating wire and the second heating wire at the other end of the heating wire in the main body plug; To the other end of the pin In a continuous state, a one-pole terminal mold integrally formed of a synthetic resin having electrical insulation is provided, and the connector of the temperature control controller is configured as a four-pole pin connector. .
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In the present invention, the terminal of the heat sensing wire at the other end of the heating wire is electrically connected to the remaining one pin provided substantially on the same line as the center line of the heating wire, and the first heating wire and the second It is preferable that the other end of the heating wire is electrically connected substantially on the same line as the center line of the heating wire, and the whole of these is integrally formed by a mold made of a resin material.
[0010]
Further, it is preferable that the first heating element wire is located on the innermost side, the second heating elementary element is located on the outer side, and the heat-sensitive element is located on the outermost side.
An electric heating appliance according to claim 1.
[0011]
Further, it is preferable that the heat-sensitive wire is located on the innermost side, the first heating element is located on the outer side, and the second heating element is located on the outermost side.
[0012]
Further, it is preferable that the first heating element wire is located on the innermost side, the heat-sensitive element is located on the outer side, and the second heating elementary element is located on the outermost side. Although this structure is not illustrated and described in the embodiments, such a structure of a three-wire wound heating wire is already known and has not been described in detail.
[0013]
【Example】
Hereinafter, preferred embodiments of the electric heating apparatus according to the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 13 denotes an electric blanket cloth made of fiber, and reference numeral 14 denotes heating wires arranged in a staggered manner in the electric blanket cloth 13. Reference numeral 15 denotes a main body plug that is electrically connected to the heating wire 14, and reference numeral 16 denotes a connector that can be detachably and electrically connected to the main body plug 15. Reference numeral 17 denotes a controller for controlling temperature, reference numeral 18 denotes a plug, reference numeral 19 denotes a power cord for connecting the plug 18 to the controller 17, and reference numeral 20 denotes a controller 17 and the connector 16. And a four-core cord for connecting FIG. 2 is an enlarged view of a portion of the main body plug 15 and the connector 16, and FIG. 3 is a rear view of the main body plug 15, and reference numeral 54 denotes a screw to be described later.
[0014]
The structure of the heating wire 14 will be described with reference to FIG. Reference numeral 6 denotes a core yarn such as tetron, 7 denotes a first heating element wire formed of a metal wire wound around the core yarn 6 in a helical manner, and 8 denotes a first heating element wire and a first heating element wire 7. This is a heat-generating wire insulator made of a resin material such as polyethylene phthalate for electrically insulating between the two heat-generating wires 9. Reference numeral 9 denotes a second heating element made of a metal wire wound from above the heating element insulator 8, and 10 denotes a temperature-sensitive layer that insulates the second heating element 9 from the heat-sensitive wire 11. It is made of a resin material such as nylon, and has a function of melting when the ambient temperature rises to the melting temperature and short-circuiting the second heating element wire 9 and the temperature-sensitive wire 11. Reference numeral 11 denotes a heat-sensitive wire made of a metal wire having a positive temperature coefficient of resistance, such as a nickel wire wound in a helical shape on the temperature-sensitive layer 10, and having a property of changing a positive temperature resistance. I have. Numeral 12 denotes an outer skin covered with tubing from above the heat-sensitive wire 11 with a synthetic resin material such as vinyl chloride.
[0015]
FIG. 6 shows another embodiment of the heating wire 14, that is, a configuration in which the arrangement of the first heating wire, the second heating wire, and the heat-sensitive wire is different.
Reference numeral 21 denotes a core yarn such as tetron. Reference numeral 22 denotes a heat-sensitive wire made of a metal wire wound in a helical shape around the core yarn, and has a property of positive temperature resistance change. 23 is a temperature-sensitive layer that insulates between the first heating element wire 24 and the temperature-sensitive wire 22 and is made of a resin material such as nylon, and melts when the ambient temperature rises and reaches the melting temperature, It has a function of short-circuiting the first heating wire 24 and the heat-sensitive wire 22. Reference numeral 24 denotes a first heating element wire made of a metal wire wound on the temperature-sensitive layer 23, and reference numeral 25 denotes polyethylene phthalate which electrically insulates the first heating element wire 24 from the second heating element wire 26. It is an insulator for a heating element wire made of a resin material such as Reference numeral 26 denotes a second heating element wire made of a metal wire wound from above the heating element insulator 25, and reference numeral 27 denotes an outer sheath tubing-coated with a synthetic resin material such as vinyl chloride from above the heat-sensitive wire 22. It is.
[0016]
Based on FIG. 6, the heating wires 14 (here, those having the structure of FIG. 4) will be described. A metal first heat generating wire pin 28 having a caulked portion 29 electrically connected to the first heat generating wire 7 of the heat generating wire 14 is electrically connected to the second heat generating wire 9 of the heat generating wire 14. A metal heat-generating wire pin 30 having a caulking portion 31 and a metal heat-sensing wire pin 32 having a caulking portion 33 electrically connected to the heat-sensitive wire 11 of the heating wire 14 are arranged at regular intervals. A three-pole terminal mold 34 molded with an electrically insulating resin material such as vinyl chloride or polyethylene, which is integrally molded.
[0017]
The structure of the other end of the heating wire 14 will be described with reference to FIGS. The first heating element wire 7 and the second heating element wire 9 are wound so as to be short-circuited on the same line as the center line of the heating wire 14, and a metal pipe 35 such as a copper pipe is put in the winding area and placed on top. Caulking from. Numeral 36 denotes a heat-shrinkable insulating tube made of a resin material. The heat-shrinkable insulating tube is put on the crimped metal pipe 35 and the periphery thereof, and is shrunk by heating. Insulate. Reference numeral 37 denotes a heat-sensitive wire pin having a caulking portion 38 and a crimping portion 39. The crimping portion 38 caulks and electrically connects the heat-sensitive wire 11, and the crimping portion 39 holds the outer skin 12 of the heat generating wire 14. The heating wire pin 37 and the heating wire 14 are fixed to each other. In this case, the heat-sensitive wire pin 37 is provided substantially on the same line as the center line of the heating wire 14. Reference numeral 51 denotes a one-pole terminal mold molded with a resin material having electrical insulation such as nylon, vinyl chloride, or polyethylene, and is integrally formed.
[0018]
Next, based on FIG. 12, the case of the heating wire 14 (the structure in which the heat-sensitive wire 22 is located at the center) in FIG.
The structure of one end of the heating wire 14 includes a metal heating wire pin 41 having a caulking portion 42 electrically connected to the heating wire 22 of the heating wire 14, a first heating wire 24 of the heating wire 14, A metal heating element pin 43 having a caulking portion 44 for electrical connection; a metal heating element pin 45 having a caulking portion 46 for electrically connecting to the second heating element 26 of the heating wire 14; Are arranged in parallel at regular intervals, and are molded with a resin material having electrical insulation properties such as nylon, vinyl chloride, or polyethylene.
[0019]
Next, the structure of the other end of the heating wire 14 will be described with reference to FIGS.
Reference numeral 48 denotes a heat-sensitive wire pin having a caulked portion 49, which is caulked substantially at the center line of the heating wire 14 and electrically connected to the thermosensitive element 22 by the caulked portion 49. The first heating wire 24 and the second heating wire 26 are wound so as to be short-circuited substantially on the same line as the center line of the heating wire 14, and a metal pipe 50 such as a copper pipe is put in the winding location. Caulking from. At this time, the heat-sensitive wire 22, the first heating wire 24, the second heating wire 26, and the metal pipe 50 are finished so as to be electrically insulated from each other. Numeral 40 denotes a one-pole terminal mold molded with a resin material having electrical insulation such as nylon, vinyl chloride, or polyethylene, which is integrally molded.
[0020]
Next, the structure of the main body plug 15 will be described with reference to FIGS.
The three-pole terminal mold 34 and the one-pole terminal mold 40 are combined as shown in the figure, and the heat-generating wire pins 28, the heat-generating wire pins 30, the heat-sensitive wire pins 32 of the three-pole terminal mold 34, and the heat-sensitive wire pins of the one-pole terminal mold 40 are combined. 37 is supported by a resin partition plate 52, the end of the electric blanket fabric 13 and the three-pole terminal mold 34 and the one-pole terminal mold 40 are sandwiched between the upper and lower body cases 51 and 53 made of resin, and The main body case 51 and the lower main body case 53 are fixed.
[0021]
Next, the structure of the connector 16 will be described with reference to FIG. Metal pin receivers 55 are provided on the body plug 15 at positions facing the heat-generating wire pins 28 and 30 and the heat-sensitive wire pins 32 and 37. Each of the pin receivers 55 is electrically connected to each wire core of the four-core cord 20. It is connected. Reference numeral 56 denotes a resin case constituting the outer periphery of the pin receiver 55, and reference numeral 57 denotes a code protector.
[0022]
Further, an electric circuit will be described with reference to FIG. Reference numeral 58 denotes a thyristor, which is connected in series with the first heating element wire 7 and the second heating element wire 9. Reference numeral 59 denotes an operational amplifier. The positive side of the operational amplifier 59 is connected to the midpoint between the resistors 61 and 62 in the series circuit of the diode 60, the resistor 61, the resistor 62, and the diode 63. The negative side of the operational amplifier is connected to the midpoint between the resistor 65 and the resistor 66 in the series circuit of the resistor 64, the heat-sensitive wire 11, the diode 68, the resistor 65, the resistor 66, and the diode 63. The output side of the operational amplifier 59 is connected to the gate of the thyristor 58 via the diode 67. The circuit connected to the positive side of the operational amplifier and the circuit connected to the negative side are connected in parallel. 70 is a thermal fuse put in the power supply circuit, and 69 is a resistor for heating the thermal fuse 70. This resistor 69 is connected in parallel with the thyristor 58 and the temperature-sensitive layer 10. Reference numeral 18 denotes an insertion plug.
[0023]
Next, the operation of the control circuit will be described.
When the plug 18 is connected to an AC power supply, a constant voltage divided by the resistors 61 and 62 is applied to the positive side of the operational amplifier 59. On the other hand, a voltage divided by the combined resistance of the resistor 64, the heat-sensitive wire 11, and the resistor 65 and the resistor 66 is applied to the minus side of the operational amplifier 59. In this case, the combined resistance of the resistor 64, the heat-sensitive wire 11, and the resistor 65 and the resistor 66 are set so that the voltage on the minus side is higher than the voltage on the plus side of the operational amplifier 59. For this reason, a signal is output from the operational amplifier 59 to the gate of the thyristor 58 for each AC frequency, the thyristor 58 is turned on, and current flows through the first heating element wire 7 and the second heating element wire 9 to generate heat. Electric blanket article 13 warms up.
[0024]
When the temperature of the electric blanket fabric 13 increases, the resistance value of the heat-sensitive wire 11 increases because the heat-sensitive wire 11 is formed of a metal wire having a positive temperature coefficient of resistance such as a nickel wire. As a result, the combined resistance value of the resistor 64, the heat-sensitive wire 11, and the resistor 65 increases, the voltage applied to these active resistors increases, and as a result, the voltage applied to the resistor 66 decreases and the operational amplifier 59 is applied. The voltage applied to the negative side is smaller than the constant voltage on the positive side. As a result, no signal is transmitted from the operational amplifier 59 to the gate of the thyristor 58, and the thyristor 58 does not conduct. As a result, the first heating element wire 7 and the second heating element wire 9 are not conducted, and the heat generation stops.
[0025]
In addition, as the temperature of the electric blanket fabric 13 decreases, the resistance value of the heat-sensitive wire 11 decreases. When the resistance value decreases, the voltage applied to the combined resistance value of the resistor 64, the heat-sensitive wire 11, and the resistor 65 also decreases, the voltage applied to the resistor 66 increases, and the voltage on the minus side of the operational amplifier 59 becomes a constant voltage on the plus side. And the signal enters the gate of the thyristor 58 from the operational amplifier 59, and the thyristor 58 conducts. As a result, the first heating element wire 7 and the second heating element wire 9 are energized to generate heat, and the electric blanket article 13 is heated. The above operation is repeated to maintain a constant temperature.
[0026]
Next, the operation of the final safety function will be described. When the operational amplifier 59 fails, the thyristor 58 fails, or the heating wire 14 is locally folded, the temperature of the heating wire 14 rises abnormally, and the temperature-sensitive layer 10 of the heating wire 14 melts. Then, the first heating element wire 7 or the second heating element wire 9 and the heat-sensitive wire 11 are short-circuited. As a result, a current flows through the circuit of the plug 18, the first heating element wire 7 or the second heating element wire 9, the heat-sensitive wire 11, the resistor 69, the temperature fuse 70, and the insertion plug 18, and the resistor 69 generates heat. Then, the thermal fuse 70 is blown and the circuit is cut off. This prevents the electric blanket article 13 from burning.
[0027]
According to the above embodiment, the following operation and effect can be obtained.
(1) In an electric heater in which a temperature control controller is provided in an intermediate portion of a cord connecting a main body of a past air blanket and an insertion plug, the main body includes a first heating element wire, a second heating element wire, and a sensor. One heating wire having a heating wire is disposed, and one end of the first heating wire and the second heating wire is short-circuited in a main body plug provided in the main body, and the first heating wire and the second heating wire are short-circuited. The other end of the heating element wire is connected to a pair of heating element pins, both ends of the heat sensing wire are connected to a pair of Kanetsu wire pins, and the heating element pin and the heat sensing pin are connected to a 4-pole pin receiver of the connector. It is detachably connected, and the pin receiver is electrically connected to a temperature controller provided in the middle of the cord via a four-core cord. Out of the 6 wires at both ends of the wire and the heat-sensitive wire, 2 wires are short-circuited in the main body plug. Only the book is connected to the temperature control controller using the heating element pins, pin receivers, and 4-core cords, and the first heating element and the second heating element in the controller as in the conventional example. The number of heat generating wire pins and the number of pin receivers can be reduced to four, and the shape of the main body plug and the connector can be made small and easy to handle without the feeling of a foreign substance, as compared with the structure of connecting the two. In addition, since the cord can be a four-core cord, it is not bulky and easy to handle.
[0028]
(2) A heating wire pin connected to the first heating wire, a heating wire pin connected to the second heating wire, and a heat sensing wire pin connected to the heat sensing wire are provided at one end of the heating wire, and molded with a resin material. One end of the heating wire is short-circuited between the first heating wire and the second heating wire, and a heat-sensitive wire pin connected to the heat-sensitive wire is provided at one end of the heating wire. Since the second heat generating wire and the heat-sensitive wire pin are insulated from each other and integrally formed by a one-pole terminal mold molded with a resin material, the short-circuit of the terminal of the heat generating wire is separately performed to perform molding. In comparison with the above, the ends of the heating wires can be grouped in two parts of the three-pole terminal mold and the one-pole terminal mold so as not to be disjointed, and the work of wiring the heating wires to the electric blanket fabric becomes easier.
[0029]
(3) A short circuit between the first heating element wire and the second heating element wire is connected to the center line of the heating wire by caulking of a metal pipe or the like, and the heat-sensitive wire pins are arranged substantially on the same line as the center line of the heating wire. Since the one-pole terminal mold is formed, the one-pole terminal mold is configured to be extremely small as compared with the short-circuit portion between the first heating wire and the second heating wire and the center line of the heat-sensitive wire. And the size of the main body plug can be reduced.
[0030]
(4) Short-circuiting work between the first heating element wire and the second heating element wire because the short-circuiting point between the first heating element wire and the second heating element wire and the heat-sensitive wire pin are performed in the one-pole terminal mold. Due to the defect, the short-circuit part is not sufficiently caulked, and even if the short-circuit part is overheated during use, the heat-sensitive layer of the heat-generating wire in the one-pole terminal mold melts, and the heat-sensitive wire and the heat-generating element wire are short-circuited. Since the circuit is cut off, safety can be ensured.
[0031]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the electric heating apparatus which concerns on this invention, in the electric heating apparatus which provided the controller for temperature control separately with the main body, such as an electric blanket, the connection pin (four) connects the main body side and the controller for temperature control. Minimize the size as a whole and reduce the number of cords (for connecting the power cord and the main body of the unit to the controller). It is something that can be provided.
[0032]
The short circuit between the first heating element wire and the second heating element wire is connected substantially on the same line as the center line of the heating wire, and the heat-sensitive wire pins are arranged almost on the same line as the center line of the heating wire to form a one-pole terminal mold. In the case of the configuration, the one-pole terminal mold can be configured to be extremely small as compared with the short-circuit portion between the first heating element wire and the second heating element wire, and the center of the heat-sensitive wire pin and the heating wire shifted. There is an advantage that the main body plug can be downsized.
Further, the unique effects of the other specific configurations of the present invention are as described in detail in the section of the embodiments of the present invention and the section of the description of the embodiments.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of an entire electric blanket showing one embodiment of an electric heating device according to the present invention.
FIG. 2 is an enlarged plan view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 3 is an enlarged plan view of a main part showing an embodiment of the electric heating apparatus according to the present invention.
FIG. 4 is a partial cross-sectional side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 5 is a partial cross-sectional side view of a main part showing another embodiment of the electric heating apparatus according to the present invention.
FIG. 6 is an enlarged plan view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 7 is a side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 8 is a side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 9 is a side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 10 is a side view of a main part showing one embodiment of the electric heating appliance according to the present invention.
FIG. 11 is a side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 12 is an enlarged plan view of a main part showing an embodiment of the electric heating apparatus according to the present invention.
FIG. 13 is a side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 14 is a side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 15 is a side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 16 is a side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 17 is a partial cross-sectional plan view of a main part showing one embodiment of the electric heating appliance according to the present invention.
FIG. 18 is a partial longitudinal side view of a main part showing one embodiment of the electric heating apparatus according to the present invention.
FIG. 18 is a partial longitudinal side view of a main part showing an embodiment of the electric heating apparatus according to the present invention.
FIG. 19 is a circuit diagram showing one embodiment of an electric heating appliance according to the present invention.
FIG. 20 is an overall plan view of an electric heater according to the related art.
FIG. 21 is a partial cross-sectional plan view of a main part of an electric heating device according to a conventional technique.
[Explanation of symbols]
7 1st heating element wire 9 2nd heating element wire 11 Heat sensing wire 14 Heating wire 15 Body plug 16 Connector

Claims

The first heating wire, the second heating wire, and the heat-sensitive wire are wound substantially concentrically and insulated from each other to form one heating wire, and the heating wire is wired to the main body of the electric heating appliance. An electric heating device comprising a body plug connected to a wire, and a connector of a temperature control controller equipped with a power cord detachably connected to the body plug.
In the main body plug, each end of the first heating element wire, the second heating element wire, and the heat-sensitive wire at one end of the heating wire is connected to each pin, and is made of synthetic resin having electrical insulation. Providing a three-pole terminal mold integrally molded,
In the main body plug, the other end of the first heating element wire and the other end of the second heating element wire at the other end of the heating wire are short-circuited, and the other end of the heat-sensing wire is connected to a pin. Providing a one-pole terminal mold integrally molded with a synthetic resin having
The temperature control controller connector is configured as a 4-pole pin connector,
Electric heating appliances.

The other end of the heat-generating wire is electrically connected to the other end of the heat-generating wire and the other pin provided substantially on the same line as the center line of the heat-generating wire. The ends are electrically connected almost on the same line as the center line of the heating wire, and these are integrally molded with a mold made of a resin material.
An electric heating appliance according to claim 1.

The first heating element wire is located on the innermost side, the second heating elementary element is located on the outer side, and the heat-sensitive element is located on the outermost side;
An electric heating appliance according to claim 1.

The heat-sensitive wire is located on the innermost side, the first heating element is located on the outer side, and the second heating element is located on the outermost side;
An electric heating appliance according to claim 1.

The first heating element wire is located on the innermost side, the heat-sensitive wire is located on the outer side thereof, and the second heating elementary wire is located on the outermost side;
An electric heating appliance according to claim 1.