JP3815311B2

JP3815311B2 - Washing and drying machine

Info

Publication number: JP3815311B2
Application number: JP2001369832A
Authority: JP
Inventors: 己紀夫田原; 正美福本; 眞一松田
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2001-12-04
Filing date: 2001-12-04
Publication date: 2006-08-30
Anticipated expiration: 2021-12-04
Also published as: JP2003164692A

Description

【０００１】
【発明の属する技術分野】
本発明は、回転中心軸を略鉛直方向に有する内槽内に温風を送風して洗濯物を乾燥させる行程を有し、洗濯から乾燥までを一貫して実施できる洗濯乾燥機に関するものである。
【０００２】
【従来の技術】
従来、この種の洗濯乾燥機は、筐体内に弾性的に吊支した外槽内に、回転中心軸を鉛直方向に有する内槽を回転自在に支持し、内槽の内底部に攪拌翼を回転自在に設け、洗い行程、すすぎ行程では、攪拌翼を回転して内槽内で衣類の洗濯、すすぎを行うともに、脱水行程では、内槽を高速回転させて脱水し、脱水行程につづく乾燥行程では、加熱装置により加熱した空気を送風機により内槽内に送風して乾燥するよう構成している。
【０００３】
上記構成においてその動作を簡単に説明すると、脱水行程終了後に内槽を停止した状態で、攪拌翼を回転速度１３０ｒ／ｍｉｎで１秒ＯＮ、０．５秒ＯＦＦの周期で正転反転を２〜３往復させる、布はがし行程を行い、脱水時に内槽の内壁面に遠心力によって張り付いた衣類をはがす。
【０００４】
つぎに、この布はがし行程の後に乾燥行程に入り、まず内槽を停止した状態で攪拌翼を回転速度１３０ｒ／ｍｉｎで０．５秒ＯＮ、０．５秒ＯＦＦの周期で正転反転を繰り返して衣類を上下に入れ替える、ほぐし行程を行い、次に内槽及び攪拌翼を停止した状態で加熱装置により加熱された温風を内槽に数分間供給して衣類を乾燥させる。そして、乾燥度合いを判定し、乾燥していれば乾燥行程を終了するが、未乾燥であれば再度上記のほぐし行程と乾燥運転を繰り返すようにしている。
【０００５】
【発明が解決しようとする課題】
このような従来の洗濯乾燥機では、攪拌翼回転によるほぐし行程において、攪拌翼回転の遠心力により外周方向に移動させられる衣類は内槽の側面と接触するが、このとき衣類は回転方向の速度をもっているため、停止している内槽との間に速度差が生じる。これにより、内槽との摩擦による、衣類のねじれやからみが発生し、しわがひどくなったり、乾燥むらが生じる可能性がある。
【０００６】
本発明は上記従来の課題を解決するもので、乾燥行程において内槽を固定しない状態で攪拌翼を正転反転させることで、攪拌翼により衣類を上下に入れ替える際の衣類と内槽との摩擦を抑え、衣類のねじれやからみを抑制し、しわの発生を抑え、むらなく乾燥させることを目的としている。
【０００７】
【課題を解決するための手段】
上記目的を達成するために、本発明の洗濯乾燥機は、制御手段により、乾燥行程において内槽を固定しない状態で攪拌翼を正転反転させながら乾燥する槽フリー攪拌モードと、前記内槽をモータで回転させながら乾燥する槽回転モードと、前記内槽を固定した状態で前記攪拌翼のみを回転させて乾燥する槽固定攪拌モードとを有し、乾燥初期は槽回転モードを行い、その後前記槽フリー攪拌モードと前記槽回転モードとを繰返し、乾燥終了近くは槽固定攪拌モードを行うようにしたものである。
【０００８】
これにより、乾燥行程での衣類の含水量に応じて衣類を適切に動かす細かい制御ができ、しわの発生を抑え、むらなく乾燥させることができる。
【０００９】
【発明の実施の形態】
請求項１に記載の発明は、筐体内に弾性的に吊支した外槽と、回転中心軸を略鉛直方向に有し前記外槽内に回転自在に支持した内槽と、前記内槽の内底部に回転自在に設けた攪拌翼と、前記内槽または前記攪拌翼を回転させるモータと、前記モータの回転を前記内槽と前記攪拌翼のいずれかに切り換えて伝達し、かつ前記攪拌翼回転時には前記内槽を固定しない状態を実現し得る駆動手段と、前記内槽内に循環風を送風する送風手段と、前記送風手段により送風される空気を加熱する加熱手段と、前記モータ、駆動手段、送風手段、及び加熱手段の動作を制御する制御手段を備え、前記制御手段は、乾燥行程において前記内槽を固定しない状態で前記攪拌翼を正転反転させながら乾燥する槽フリー攪拌モードと、前記内槽を前記モータで回転させながら乾燥する槽回転モードと、前記内槽を固定した状態で前記攪拌翼のみを回転させて乾燥する槽固定攪拌モードとを有し、乾燥初期は槽回転モードを行い、その後前記槽フリー攪拌モードと前記槽回転モードとを繰返し、乾燥終了近くは槽固定攪拌モードを行うようにしたものであり、乾燥行程での衣類の含水量に応じて衣類を適切に動かす細かい制御ができ、しわの発生を抑え、むらなく乾燥させることができる。
【００１０】
請求項２に記載の発明は、上記請求項１に記載の発明において、制御手段は、乾燥行程において乾燥の進行とともに槽回転モードの時間を短く、槽フリー攪拌モードの時間を長くしたことにより、衣類の入れ替えの頻度を上げて、むらなく乾燥を進行させることができる。
【００１１】
請求項３に記載の発明は、上記請求項１または２に記載の発明において、制御手段は、槽フリー攪拌モードにおいて、モータのＯＮ／ＯＦＦを時間制御することで攪拌翼を正転反転させ、ＯＦＦ時間を内槽の惰性回転が停止するのに十分な長さの時間としたものであり、これにより、攪拌翼を例えば右回転させたときに発生する内槽の右回転回りの惰性回転が終わらないうちに、攪拌翼を左回転させることがない。このため、内槽と共に回転する衣類にカウンターの回転力を加えてしまうことで、ねじれやからみを発生させるようなことがないので、しわの発生を抑え、むらなく乾燥させることができる。
【００１２】
請求項４に記載の発明は、上記請求項１または２に記載の発明において、内槽の回転を検知する内槽回転検知手段を備え、制御手段は槽フリー攪拌モードにおいて、正転反転切換え時に、内槽の惰性回転が停止するのを検知してからモータをＯＮするようにしたものであり、これにより、攪拌翼を例えば右回転させたときに発生する内槽の右回転回りの惰性回転が終わらないうちに、攪拌翼を左回転させることがない。このため、内槽と共に回転する衣類にカウンターの回転力を加えてしまうことで、ねじれやからみを発生させるようなことがないので、しわの発生を抑え、むらなく乾燥させることができる。
【００１３】
請求項５に記載の発明は、上記請求項１〜４のいずれか１項に記載の発明において、内槽の内壁側面に垂直方向のリブを設けたものであり、槽フリー攪拌モードにおいて攪拌翼を正転反転させることで発生する遠心力により攪拌翼の外周方向に跳ね上げられた衣類が内槽の内壁側面と接触する際の内槽の供回りを、確実に引き起こすことができるため、衣類と供回り後の内槽との摩擦を確実に小さくすることができ、衣類のねじれやからみを抑制し、しわの発生を抑え、むらなく乾燥させることができる。
【００１４】
請求項６に記載の発明は、上記請求項５に記載の発明において、リブの高さは攪拌翼の外周近傍では０で、上方に向けて前記内槽の内壁から内方へ突出するようにテーパ状に設けられ、かつ、リブの上端の高さは０で、下方に向けて前記内槽の内壁から内方へ突出するようにテーパ状に設けたものであり、槽フリー攪拌モードにおいて攪拌翼を正転反転させることで発生する遠心力により攪拌翼の外周方向に跳ね上げられた衣類が内槽の内壁側面と接触する際に、リブの下部により跳ね上げが妨害されることなく、内槽の供回りを安定して引き起こすことができるため、衣類のねじれやからみを抑制し、しわの発生を抑え、むらなく乾燥させることができる。
【００１５】
請求項７に記載の発明は、上記請求項５または６に記載の発明において、リブの上端は内槽の高さ方向の略中央部に位置するように設けたものであり、リブが内槽の上部まで伸びていないため、使用者が衣類を投入する際にリブが物理的、心理的な障害となることがない。
【００１６】
【実施例】
（実施例１）
本発明の実施例１について、図１〜図３を参照しながら説明する。筐体１１は、内部に、複数のサスペンション１２によって外槽１３を弾性的に吊り下げて支持し、運転時の振動をサスペンション１２によって吸収する構成としている。外槽１３の内部には、回転中心軸を略鉛直方向に有し衣類を収容する内槽１４を回転自在に支持し、内槽１４の内底部に衣類を撹拌する攪拌翼１５を回転自在に設けている。攪拌翼１５は、内側に衣類を引っ掛けるリブ１７を備え、外周側にはテーパ部１６が設けられ鍋型に形成されている。
【００１７】
内槽１４の内部周壁には多数の脱水孔１８を設け、その上方には流体バランサ１９を設けている。そして、外槽１３の底部には、モータ２０とモータ２０の回転を内槽１４及び攪拌翼１５に伝達する駆動手段が取り付けられている。
【００１８】
駆動手段は、内槽１４に連結される中空の脱水軸２１と、脱水軸２１の中空部に配され、かつ、上端を攪拌翼１５に連結し、下端をモータ２０のロータ２０ａに連結した洗濯軸２２と、脱水軸２１と摺動可能に嵌合して上下動することでロータ２０ａの回転の脱水軸２１への伝達、非伝達切換えを行うクラッチ板２５、クラッチ板２５を上下動させるクラッチレバー２６、及びクラッチレバー２６を駆動させるギアードモータ３９などから構成される。
【００１９】
図１に示すように、クラッチ板２５は可動範囲の下側にあるときには、クラッチ板２５の下側に設けた下歯２５ａと、ロータ２０ａに設けた回転歯２０ｂとがかみ合うことで、ロータ２０ａの回転が脱水軸２１を介して内槽１４へと伝達される。図２に示すように、クラッチ板２５をギアードモータ３９により駆動されるクラッチレバー２６により可動範囲の上方へ移動させると、クラッチ板２５の下歯２５ａとロータ２０ａの回転歯２０ｂとのかみ合いが外れ、ロータ２０ａの回転が洗濯軸２２を介して攪拌翼１５のみへと伝達される。このとき、クラッチ板２５の上側に設けた上歯２５ｂと静止部位２７に設けた静止歯２７ａとはかみ合っておらず、脱水軸２１は固定されていないので、内槽１４は回転フリーの状態にある。クラッチ板２５をさらに上方へ移動させると、図３に示すように、クラッチ板２５の上側に設けた上歯２５ｂと静止部位２７に設けた静止歯２７ａとがかみ合い、脱水軸２１を固定し、内槽１４を固定する。
【００２０】
制御手段３８は、ギアードモータ３９を駆動させ、クラッチレバー２６を介して、上記３つのクラッチ状態を必要に応じて切り換えることができる。
【００２１】
外槽１３の下部から、伸縮自在の下部蛇腹状ホース２８を介して循環ダクト２９へと通路を構成し、循環ダクト２９の出口は乾燥用送風機（送風手段）３０の入口に連結している。乾燥用送風機３０の出口は通路２９ａに連結し、この通路２９ａ内にヒータ（加熱手段）３１を設け、通路２９ａに伸縮自在の上部蛇腹状ホース３２を連結している。上部蛇腹状ホース３２の先には噴出ダクト３３がつながり、内槽１４へ向けて開口している。内槽１４は、内部周壁の脱水孔１８を通して外槽１３に通じているので、これら通路は循環経路を構成している。
【００２２】
また、外槽１３の上部には開閉自在の蓋３５を設けており、使用者が衣類を出し入れする際に、開けることができ、乾燥運転させるときには、閉じることで循環経路を密閉する。冷却用送風機３６は、筐体１１の側面に取り付けられ、内槽１４の下部及び循環ダクト２９を冷却するように構成している。排水弁３７は外槽３内の水を、排水ホース４３を通して排水するものである。
【００２３】
制御手段３８はモータ２０、駆動手段、乾燥用送風機３０、ヒータ３１、冷却用送風機３６、及び排水弁３７などの動作を制御して、洗濯、すすぎ、脱水及び乾燥行程を制御する。
【００２４】
上記構成において動作を説明する。まず、洗濯行程では、制御手段３８は図１のようにクラッチ板２５が可動範囲の下部にある状態でモータ２０を駆動させることにより、衣類と洗濯水の入った内槽１４を回転させる。このとき、排水弁３７は閉じている。
【００２５】
このことにより、内槽１４内の洗濯水の外周部分は、遠心力により上昇する。これに伴い、内槽１４と外槽１３の間の洗濯水は外槽１３の内壁に沿って上昇した後、内槽１４の上部から内槽１４内に散水され、循環することになる。これにより、内槽１４内では洗濯水が衣類を通過することになり洗浄される。
【００２６】
その後、洗い行程と同様にして衣類をすすぐすすぎ行程を経て、脱水行程では、排水弁３７を開くことにより、排水ホース４３から排水し、次に図１のようなクラッチ状態で、モータ２０を駆動させ、衣類が入った内槽１４を高速で回転させる。これにより生じる遠心力により、衣類は内槽１４の内壁に押しつけられ、この遠心力で水分が衣類から分離されて脱水孔１８から外槽１３へと抜け、排水ホース４３より排水され、脱水行程が進行する。
【００２７】
乾燥行程では、乾燥用送風機３０の送風とヒータ３１の発熱により、上部蛇腹状ホース３２、噴出ダクト３３を通して内槽１４へ乾いた温風が送り込まれる。内槽１４へ送り込まれた温風は、これら衣類の隙間を通るときに衣類から水分を奪い、湿った状態で、内槽１４から外槽１３の内側へと出た後、下部蛇腹状ホース２８を通過し、循環ダクト２９へ至る。湿気を含んだ温風が、外槽１３の内壁や循環ダクト２９内を通過しているとき、冷却用送風機３６により、外槽１３の下部や循環ダクト２９の外壁は冷却されることになり、湿った空気の水分はその内壁に結露し、湿った温風は除湿されて、乾燥用送風機３０へと戻る。外槽１３及び循環ダクト２９の内壁に結露した水は、排水弁３７を必要に応じて開くことで、排水ホース４３より排出される。そして乾燥行程終了後に、ヒータ３１を切り、乾燥用送風機３０、冷却用送風機３６を駆動する送風行程を行い、乾燥した衣類をクールダウンさせた後に終了する。ここでは、湿った温風を冷却する手段として冷却空気を用いる空冷除湿方式としているが、水冷除湿方式のものであっても構わない。
【００２８】
乾燥行程において、制御手段３８はモータ２０、駆動手段、乾燥用送風機３０、ヒータ３１、冷却用送風機３６の動作を以下の説明の通りに制御する。洗濯行程が終了して乾燥行程に入ると、まず、洗濯行程の最後の脱水で衣類が内槽１４の壁面に張り付いているので、これをはがし、そして十分にほぐして、衣類の空気との接触面積が大きくなるようにするために布はがし行程を行う。
【００２９】
具体的には、ギアードモータ３９を駆動させ、クラッチレバー２６を介して、クラッチ板２５を上方へ移動させ、図３に示すようなクラッチ状態でモータ２０を０．４秒ＯＮ、１．２秒ＯＦＦの時限で、正転反転させ、内槽１４を固定した状態で、攪拌翼１５を３往復させる。こうすることにより、脱水時に内槽１４の壁面に張り付いていた衣類がはがれ、そして、衣類の布かさが増して空気との接触面積が大きくなって、以後の乾燥の進行が早くなるようにする。
【００３０】
次に、図１に示すようなクラッチ状態で、モータ２０を回転させ、内槽１４を３５ｒ／ｍｉｎの回転速度で１方向に回転させながら乾燥させる槽回転モードを１５分間行う。槽回転モードでは、１方向に内槽１４をゆっくりと回転させるだけなので、衣類は内槽１４の中で動くことがない。このため、含水量が多いためにからみやすい乾燥初期の段階において、衣類のねじれやからみを全く発生させることがなく、また、含水量が多いため、衣類を動かさなくても十分に乾燥は進行する。
【００３１】
次に内槽１４の回転を停止させ、ギアードモータ３９を駆動させてクラッチレバー２６を介して図２に示すようなクラッチ状態にして、モータ２０を０．５秒ＯＮ、４．５秒ＯＦＦの時限で、正転反転させ、内槽１４を固定しないフリーの状態で１６０ｒ／ｍｉｎの回転速度で正転反転させながら乾燥させる槽フリー攪拌モードを３０秒間行う。このとき衣類は、攪拌翼１５に設けられたリブ１７にひっかけられた状態で回転により生じた遠心力により、攪拌翼１５の外周側へと移動し、テーパ部１６により上方向への力を受け、攪拌翼１５の外周端部で跳ね上げられ、これを繰り返すことにより衣類を上下に入れ替える。回転しながら跳ね上げられた衣類は内槽１４の内壁側面と接触するが、内槽１４は回転フリーの状態であるため、衣類と内槽１４との摩擦により内槽１４は同方向に供回りする。
【００３２】
これにより、衣類と内槽１４との速度差を小さくすることができ、以降衣類と内槽１４との摩擦は抑制される。このため、衣類を上下に入れ替えながらも、衣類のねじれやからみを抑えることができ、しわの発生を抑え、むらなく乾燥させることができる。また、内槽１４が供回りしたとき、供回りの惰性回転が続くが、ＯＦＦ時間を４．５秒と大きくとっているため、惰性回転が停止しないうちに、攪拌翼１５を反転させることはない。このため、内槽１４と共に回転する衣類にカウンターの回転力を加えてしまうことで、ねじれやからみを発生させるようなことがないので、しわの発生を抑え、むらなく乾燥させることができる。
【００３３】
そして、再び槽回転モードを行い、以降順次、槽回転モードと槽フリー攪拌モードを繰り返すのであるが、乾燥の進行とともに、槽回転モードの時間を短く、槽フリー攪拌モードの時間を長くして、衣類の入れ替えの頻度を上げていき、むらなく乾燥を進行させていく。
【００３４】
乾燥終了近くの仕上げの段階に入ると、図３に示すようなクラッチ状態に切換え、モータ２０を０．４秒ＯＮ、１．２秒ＯＦＦの時限で、正転反転させ、内槽１４を固定した状態で攪拌翼１５を１６０ｒ／ｍｉｎの回転速度で正転反転させながら乾燥させる槽固定攪拌モードを行う。槽固定攪拌モードでは、内槽１４の惰性回転の停止を待つことなく、攪拌翼１５を頻繁に正転反転させることにより、衣類の上下の入れ替えを素早く行い、まんべんなく温風を当てて素早く乾燥を仕上げることができる。そしてヒータ３１を切り、乾燥用送風機３０、冷却用送風機３６を駆動する送風行程を行って、衣類をクールダウンさせた後に、全乾燥行程を終了させる。
【００３５】
このように本実施例によれば、制御手段３８は、乾燥行程において内槽１４を固定しない状態で、攪拌翼１５を正転反転させながら乾燥する槽フリー攪拌モードを行うことで、遠心力により攪拌翼１５の外周方向に跳ね上げられた衣類が内槽１４の内壁側面と接触する際の内槽１４の供回りにより、衣類と内槽１４の回転の速度差を小さくし、摩擦を抑えることができるので、衣類を上下に入れ替えながらも、ねじれやからみを抑制し、しわの発生を抑え、むらなく乾燥させることができる。
【００３６】
また、制御手段３８は、含水量が多くからみやすい乾燥初期の段階では、衣類を全く動かすことのない槽回転モードが主体の乾燥を行うことにより、衣類のねじれやからみを全く発生させずに乾燥させ、乾燥率が高くなり、衣類がからみにくくなるに従って、徐々に槽フリー攪拌モードが主体の行程へと移行し、衣類を上下に入れ換えながらも衣類のねじれやからみを抑制して乾燥させ、さらに乾燥の仕上げの段階で、回転翼１５を頻繁に正転反転させることにより、衣類の上下の入れ換えを素早く行うことのできる槽固定攪拌モードが主体の行程へと移行することで、まんべんなく温風を当てて乾燥させるので、しわの発生を抑え、むらなく乾燥させることができる。
【００３７】
また、制御手段３８は、槽フリー攪拌モードにおいて、モータ２０のＯＮ／ＯＦＦを時間制御することで攪拌翼１５を正転反転させ、ＯＦＦ時間を内槽１４の惰性回転が停止するのに十分な長さの時間としているので、攪拌翼１５を回転させたときに発生する内槽１４の同方向への惰性回転が終わらないうちに、攪拌翼１５を反転させることがない。このため、内槽１４と共に回転する衣類にカウンターの回転力を加えてしまうことで、ねじれやからみを発生させるようなことがないので、しわの発生を抑え、むらなく乾燥させることができる。
【００３８】
なお、本実施例では、ロータの回転を直接攪拌翼１５に伝達する駆動手段を用いているが、減速機構を有し、モータ２０の回転を攪拌翼１５に減速して伝達する駆動手段であっても構わない。また制御手段３８は、乾燥行程においてモータ２０及び駆動手段を制御して、槽フリー攪拌モードと、内槽を回転させながら乾燥する槽回転モードと、内槽１４を固定した状態で攪拌翼１５のみを回転させて乾燥する槽固定攪拌モードとを行わせたが、必ずしもこれに限られるものではなく、槽フリー攪拌モードに、他の少なくとも１モードを組合せて行うものであってもよい。
【００３９】
（実施例２）
次に本発明の第２の実施例について図４を参照しながら説明する。内槽１４は、流体バランサー１９の上部に複数のマグネット４２を備えており、マグネット４２の磁気を検知して、内槽１４の回転を検知する内槽回転検知手段４０を外槽１３の蓋３５の近傍に設けている。また、内槽１４の内壁側面には垂直方向に伸びたリブ４１を複数備えており、リブ４１の高さは攪拌翼１５の外周近傍では０で、上方にいくに従い、テーパ状に大きくなり、また、上端のリブ４１は内槽１４の略中央部で切れて、高さは０であり、下方にいくに従いテーパ状に大きくなる。その他の構成は上記実施例１と同じであり、同一符号を付して説明を省略する。
【００４０】
上記構成により、制御手段３８は、槽フリー攪拌モードにおいて、正転反転切換え時に、内槽１４の惰性回転が停止するのを検知してからモータ２０をＯＮすることができるので、攪拌翼１５を回転させたときに発生する内槽１４の同方向への供回りによる惰性回転が終わらないうちに、攪拌翼１５を反転させることがない。このため、内槽１４と共に回転する衣類にカウンターの回転力を加えてしまうことで、ねじれやからみを発生させるようなことがないので、しわの発生を抑え、むらなく乾燥させることができる。
【００４１】
また、内槽１４の内壁側面に垂直方向に伸びるリブ４１を設けているので、攪拌翼１５を正転反転させることで発生する遠心力により攪拌翼１５の外周方向に跳ね上げられた衣類が内槽１４の内壁側面と接触する際の内槽１４の供回りを、確実に引き起こすことができるため、衣類と供回り後の内槽１４との摩擦を確実に小さくすることができ、衣類のねじれやからみを抑制し、しわの発生を抑え、むらなく乾燥させることができる。また、リブ４１の高さは攪拌翼１５の外周近傍では０で、上方にいくに従いテーパ状に大きくなるようにしているので、攪拌翼１５を正転反転させることで発生する遠心力により攪拌翼１５の外周方向に跳ね上げられた衣類が内槽１４の内壁側面と接触する際に、リブ４１の下部により跳ね上げが妨害されることなく、内槽１４の供回りを安定して引き起こすことができる。このため、衣類のねじれやからみを抑制し、しわの発生を抑え、むらなく乾燥させることができる。
【００４２】
また、リブ４１の上端は内槽１４の高さ方向の略中央部で切れているので、リブ４１が内槽１４の上部まで伸びていないため、使用者が衣類を投入する際にリブ４１が物理的、心理的な障害となることがない。また、上端のリブ４１の高さは０で、下方にいくに従いテーパ状に大きくしているので、リブ４１の上に存在する衣類がリブ４１の上端部により引っかかることで、傷むこともないし、またねじれやからみの原因となることもなく、しわの発生を抑え、むらなく乾燥させることができる。
【００４３】
【発明の効果】
以上のように本発明の洗濯乾燥機によれば、乾燥行程での衣類の含水量に応じて衣類を適切に動かすことができ、しわの発生を抑え、むらなく乾燥させることができる。
【図面の簡単な説明】
【図１】本発明の実施例１の槽回転モードにおける洗濯乾燥機の断面図
【図２】同槽フリー攪拌モードにおける洗濯乾燥機の断面図
【図３】同槽固定攪拌モードにおける洗濯乾燥機の断面図
【図４】本発明の実施例２における洗濯乾燥機の断面図
【符号の説明】
１１筐体
１３外槽
１４内槽
１５攪拌翼
２０モータ
３０乾燥用送風機（送風手段）
３１ヒータ（加熱手段）
３８制御手段
４０内槽回転検知手段
４１リブ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a washing / drying machine having a process of blowing warm air into an inner tub having a rotation center axis in a substantially vertical direction to dry laundry, and capable of performing from washing to drying consistently. .
[0002]
[Prior art]
Conventionally, this type of washing and drying machine supports an inner tub having a rotation center axis in a vertical direction in an outer tub that is elastically suspended in a casing, and a stirring blade is provided at the inner bottom of the inner tub. In the washing process and rinsing process, the agitating blades are rotated to wash and rinse clothes in the inner tub. In the dehydration process, the inner tub is rotated at high speed to dehydrate and dry following the dehydration process. In the process, the air heated by the heating device is blown into the inner tank by a blower and dried.
[0003]
Briefly explaining the operation in the above configuration, with the inner tank stopped after completion of the dehydration process, the stirring blade is rotated for 1 second at a rotational speed of 130 r / min for 1 second and 0.5 seconds for OFF inversion. The cloth is peeled back and forth three times, and the clothes attached to the inner wall surface of the inner tub by centrifugal force are removed during dehydration.
[0004]
Next, the cloth enters the drying process after the peeling process. First, with the inner tub stopped, the stirring blade is repeatedly rotated in the forward direction at a rotation speed of 130 r / min for 0.5 seconds ON and 0.5 seconds OFF. The clothes are exchanged up and down, a loosening process is performed, and then the clothes are dried by supplying warm air heated by a heating device to the inner tank for several minutes while the inner tank and the stirring blade are stopped. Then, the degree of drying is determined, and if it is dry, the drying process is terminated, but if it is not dried, the above-described loosening process and drying operation are repeated again.
[0005]
[Problems to be solved by the invention]
In such a conventional washer-dryer, in the loosening process by rotating the stirring blade, the clothing moved in the outer circumferential direction by the centrifugal force of the stirring blade rotation comes into contact with the side surface of the inner tub. Therefore, there is a speed difference with the stopped inner tank . As a result, the clothes may be twisted or entangled due to friction with the inner tub, and wrinkles may become severe or dry unevenness may occur.
[0006]
The present invention solves the above-described conventional problems, and the friction between the clothing and the inner tub when the clothing is switched up and down by the stirring wing by reversing the stirring wing in the normal rotation state without fixing the inner tub in the drying process. The purpose is to suppress kinking and entanglement of clothing, suppress the generation of wrinkles, and dry evenly.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the washing / drying machine according to the present invention comprises a tank-free stirring mode in which the control unit is configured to dry while reversing the stirring blade in a state where the inner tank is not fixed in the drying process, and the inner tank It has a tank rotation mode that dries while rotating with a motor, and a tank fixed agitation mode that dries only by rotating the stirring blade while the inner tank is fixed. The tank-free stirring mode and the tank rotation mode are repeated, and the tank-fixed stirring mode is performed near the end of drying .
[0008]
Thereby, the fine control which moves clothing appropriately according to the moisture content of the clothing in a drying process can be performed, generation | occurrence | production of a wrinkle can be suppressed, and it can dry uniformly.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 includes an outer tub elastically suspended in a housing, an inner tub having a rotation center axis in a substantially vertical direction and rotatably supported in the outer tub, An agitating blade provided rotatably on the inner bottom, a motor for rotating the inner tank or the agitating blade, and transmitting the rotation of the motor by switching to either the inner tank or the agitating blade, and the agitating blade Driving means capable of realizing a state in which the inner tank is not fixed at the time of rotation, blowing means for blowing circulating air into the inner tank, heating means for heating air blown by the blowing means, the motor, and driving A control means for controlling the operation of the means, the air blowing means, and the heating means, and the control means is a tank-free stirring mode in which the inner tub is not fixed in the drying process, and the stirring blade is rotated while rotating in the normal direction. Rotate the inner tank with the motor A tank rotation mode that dries while drying, and a tank fixed agitation mode that rotates only the stirring blade while the inner tank is fixed, and performs the tank rotation mode in the initial stage of drying, and then the tank-free stirring. Mode and the tank rotation mode are repeated, and the tank fixed agitation mode is performed near the end of drying , and fine control to move the clothes appropriately according to the moisture content of the clothes in the drying process is possible. Occurrence can be suppressed and drying can be performed uniformly.
[0010]
The invention according to claim 2 is the invention according to claim 1, wherein the control means shortens the time of the tank rotation mode and the time of the tank free stirring mode as the drying progresses in the drying process , The frequency of changing clothes can be increased, and drying can be progressed evenly.
[0011]
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the control means in the tank-free stirring mode reverses the stirring blade in the normal direction by controlling the ON / OFF of the motor over time. The OFF time is set to a time sufficiently long to stop the inertial rotation of the inner tank, so that the inertial rotation around the clockwise rotation of the inner tank that occurs when the stirring blade is rotated to the right, for example. The stirring blade will not rotate counterclockwise before it is finished. For this reason, by applying the rotational force of the counter to the clothes that rotate together with the inner tub, there is no occurrence of twisting or entanglement, so that generation of wrinkles can be suppressed and drying can be performed uniformly.
[0012]
According to a fourth aspect of the present invention, in the first or second aspect of the invention, there is provided an inner tank rotation detecting means for detecting the rotation of the inner tank, and the control means is in the tank free stirring mode at the time of forward / reverse switching. The inertial rotation around the clockwise rotation of the inner tank that occurs when the stirring blade is rotated clockwise, for example, when the motor is turned on after detecting the inertial rotation of the inner tank is stopped. The stirring blade will not rotate counterclockwise before the process is over. For this reason, by applying the rotational force of the counter to the clothes that rotate together with the inner tub, there is no occurrence of twisting or entanglement, so that generation of wrinkles can be suppressed and drying can be performed uniformly.
[0013]
The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein a rib in the vertical direction is provided on the side surface of the inner wall of the inner tank. Since the clothes splashed up in the outer circumferential direction of the stirring blade by the centrifugal force generated by reversing the forward rotation of the inner tank can surely cause the inner tank to be brought into contact with the inner wall side surface of the inner tank, the clothes Thus, the friction with the inner tank after the rotation can be surely reduced, the twist and entanglement of the clothes can be suppressed, the generation of wrinkles can be suppressed, and the clothes can be dried uniformly.
[0014]
According to a sixth aspect of the present invention, in the invention of the fifth aspect, the height of the rib is 0 in the vicinity of the outer periphery of the stirring blade, and protrudes inward from the inner wall of the inner tank upward. It is provided in a tapered shape , and the height of the upper end of the rib is 0, and is provided in a tapered shape so as to protrude downward from the inner wall of the inner tank. When clothing that is spun up in the outer circumferential direction of the stirring blade by the centrifugal force generated by reversing the blade in normal rotation comes into contact with the inner wall side surface of the inner tub, the flip-up is not hindered by the lower part of the rib. Since the circulation of the tank can be stably caused, the twist and entanglement of the clothes can be suppressed, the generation of wrinkles can be suppressed, and the tank can be dried uniformly.
[0015]
The invention according to claim 7 is the invention according to claim 5 or 6, wherein the upper end of the rib is provided so as to be positioned at a substantially central portion in the height direction of the inner tank, and the rib is the inner tank. The ribs do not become a physical or psychological obstacle when the user puts clothes.
[0016]
【Example】
Example 1
A first embodiment of the present invention will be described with reference to FIGS. The casing 11 has a configuration in which an outer tub 13 is elastically suspended and supported by a plurality of suspensions 12 and vibrations during operation are absorbed by the suspensions 12. Inside the outer tub 13, an inner tub 14 having a rotation center axis in a substantially vertical direction and rotatably supporting clothes is rotatably supported, and an agitating blade 15 for stirring the garments at the inner bottom of the inner tub 14 is rotatable. Provided. The stirring blade 15 includes a rib 17 for hooking clothes on the inner side, and a tapered portion 16 is provided on the outer peripheral side to form a pan shape.
[0017]
A number of dewatering holes 18 are provided in the inner peripheral wall of the inner tank 14, and a fluid balancer 19 is provided above the dewatering holes 18. A motor 20 and driving means for transmitting the rotation of the motor 20 to the inner tank 14 and the stirring blade 15 are attached to the bottom of the outer tank 13.
[0018]
The drive means is a hollow dewatering shaft 21 connected to the inner tub 14, a washing portion in which the upper end is connected to the stirring blade 15 and the lower end is connected to the rotor 20 a of the motor 20. A clutch plate 25 that switches between transmission and non-transmission of rotation of the rotor 20a to the dehydrating shaft 21 by slidably fitting with the shaft 22, the dehydrating shaft 21, and a clutch that moves the clutch plate 25 up and down. The lever 26 and a geared motor 39 that drives the clutch lever 26 are configured.
[0019]
As shown in FIG. 1, when the clutch plate 25 is at the lower side of the movable range, the lower teeth 25a provided on the lower side of the clutch plate 25 and the rotating teeth 20b provided on the rotor 20a are engaged with each other, whereby the rotor 20a. Is transmitted to the inner tank 14 via the dehydrating shaft 21. As shown in FIG. 2, when the clutch plate 25 is moved above the movable range by the clutch lever 26 driven by the geared motor 39, the lower teeth 25a of the clutch plate 25 and the rotating teeth 20b of the rotor 20a are disengaged. The rotation of the rotor 20a is transmitted only to the stirring blade 15 through the washing shaft 22. At this time, the upper teeth 25b provided on the upper side of the clutch plate 25 and the stationary teeth 27a provided on the stationary part 27 are not engaged with each other, and the dewatering shaft 21 is not fixed. is there. When the clutch plate 25 is further moved upward, as shown in FIG. 3, the upper teeth 25b provided on the upper side of the clutch plate 25 and the stationary teeth 27a provided on the stationary portion 27 are engaged, and the dehydrating shaft 21 is fixed. The inner tank 14 is fixed.
[0020]
The control means 38 drives the geared motor 39 and can switch the three clutch states via the clutch lever 26 as necessary.
[0021]
A passage is formed from the lower part of the outer tub 13 to a circulation duct 29 via a retractable lower bellows-like hose 28, and an outlet of the circulation duct 29 is connected to an inlet of a drying fan (blower unit) 30. The outlet of the drying blower 30 is connected to a passage 29a, a heater (heating means) 31 is provided in the passage 29a, and a telescopic upper bellows-like hose 32 is connected to the passage 29a. A jet duct 33 is connected to the tip of the upper bellows-like hose 32 and opens toward the inner tank 14. Since the inner tank 14 communicates with the outer tank 13 through the dewatering holes 18 on the inner peripheral wall, these passages constitute a circulation path.
[0022]
In addition, an openable / closable lid 35 is provided on the upper part of the outer tub 13 so that it can be opened when the user puts in and out the clothes, and when the drying operation is performed, the circulation path is sealed by closing. The cooling fan 36 is attached to the side surface of the housing 11 and is configured to cool the lower portion of the inner tank 14 and the circulation duct 29. The drain valve 37 drains the water in the outer tub 3 through the drain hose 43.
[0023]
The control means 38 controls the operation of the motor 20, the drive means, the drying fan 30, the heater 31, the cooling fan 36, the drain valve 37, etc., and controls the washing, rinsing, dehydration and drying processes.
[0024]
The operation in the above configuration will be described. First, in the washing process, the control means 38 rotates the inner tub 14 containing the clothes and washing water by driving the motor 20 with the clutch plate 25 at the lower part of the movable range as shown in FIG. At this time, the drain valve 37 is closed.
[0025]
Thereby, the outer peripheral part of the washing water in the inner tub 14 is raised by centrifugal force. Accordingly, the washing water between the inner tub 14 and the outer tub 13 rises along the inner wall of the outer tub 13, and then is sprinkled from the upper part of the inner tub 14 into the inner tub 14 and circulates. As a result, the washing water passes through the clothes in the inner tub 14 and is washed.
[0026]
Thereafter, the clothes are rinsed in the same manner as the washing process. In the dehydration process, the drain valve 37 is opened to drain the water from the drain hose 43, and then the motor 20 is driven in a clutch state as shown in FIG. The inner tub 14 containing the clothes is rotated at a high speed. Due to the centrifugal force generated by this, the clothes are pressed against the inner wall of the inner tub 14, the moisture is separated from the clothes by this centrifugal force, drains from the dewatering hole 18 to the outer tub 13, drains from the drain hose 43, and the dehydration process is performed. proceed.
[0027]
In the drying process, dry hot air is sent to the inner tank 14 through the upper bellows-like hose 32 and the ejection duct 33 by the air blown by the drying blower 30 and the heat generated by the heater 31. The warm air sent into the inner tub 14 removes moisture from the garments when passing through the gaps between these garments, and after getting out from the inner tub 14 to the inside of the outer tub 13 in a wet state, the lower bellows-like hose 28 To the circulation duct 29. When the hot air containing moisture passes through the inner wall of the outer tub 13 and the inside of the circulation duct 29, the lower part of the outer tub 13 and the outer wall of the circulation duct 29 are cooled by the cooling fan 36. The moisture of the moist air is condensed on the inner wall, and the moist warm air is dehumidified and returned to the drying fan 30. The water condensed on the inner wall of the outer tub 13 and the circulation duct 29 is discharged from the drain hose 43 by opening the drain valve 37 as necessary. Then, after the drying process is finished, the heater 31 is turned off, a blowing process for driving the drying fan 30 and the cooling fan 36 is performed, and after the dried clothes are cooled down, the process is ended. Here, the air-cooled dehumidification method using cooling air is used as means for cooling the wet warm air, but a water-cooled dehumidification method may be used.
[0028]
In the drying process, the control unit 38 controls the operations of the motor 20, the driving unit, the drying fan 30, the heater 31, and the cooling fan 36 as described below. When the washing process is finished and the drying process is started, the clothes are attached to the wall surface of the inner tub 14 at the last dehydration of the washing process. A cloth peeling process is performed to increase the contact area.
[0029]
Specifically, the geared motor 39 is driven, the clutch plate 25 is moved upward via the clutch lever 26, and the motor 20 is turned on for 0.4 seconds and 1.2 seconds in the clutch state as shown in FIG. The stirring blade 15 is reciprocated three times with the inner tank 14 being fixed in a state of being reversely rotated in the OFF time period. By doing so, the clothes attached to the wall surface of the inner tub 14 at the time of dehydration are peeled off, and the cloth area of the clothes increases to increase the contact area with the air, so that the subsequent drying progresses faster. To do.
[0030]
Next, in the clutch state as shown in FIG. 1, the motor 20 is rotated, and the tank rotation mode for drying the inner tank 14 while rotating the inner tank 14 in one direction at a rotation speed of 35 r / min is performed for 15 minutes. In the tank rotation mode, since the inner tank 14 is only slowly rotated in one direction, the clothing does not move in the inner tank 14. For this reason, there is no twisting or entanglement of the clothing at the initial stage of drying, which is easy to entangle due to the high water content, and the drying proceeds sufficiently without moving the clothing because of the high water content. .
[0031]
Next, the rotation of the inner tub 14 is stopped, the geared motor 39 is driven, and the clutch state as shown in FIG. 2 is established via the clutch lever 26, and the motor 20 is turned on for 0.5 seconds and turned off for 4.5 seconds. A tank-free stirring mode is performed for 30 seconds, which is rotated in the normal direction at a time limit and dried while being rotated in the normal direction at a rotation speed of 160 r / min in a free state where the inner tank 14 is not fixed. At this time, the clothing moves to the outer peripheral side of the stirring blade 15 by the centrifugal force generated by the rotation while being hooked on the rib 17 provided on the stirring blade 15, and receives the upward force from the tapered portion 16. The clothes are flipped up at the outer peripheral end of the stirring blade 15, and the clothes are changed up and down by repeating this. The clothing that is spun up while rotating contacts the inner wall side surface of the inner tub 14, but the inner tub 14 is in a rotation-free state, so the inner tub 14 is rotated in the same direction by friction between the clothing and the inner tub 14. To do.
[0032]
Thereby, the speed difference between clothing and the inner tub 14 can be reduced, and friction between the clothing and the inner tub 14 is suppressed thereafter. For this reason, while changing clothes up and down, the twist and entanglement of clothes can be suppressed, generation | occurrence | production of wrinkles can be suppressed, and it can dry uniformly. In addition, when the inner tank 14 is rotated, the inertial rotation of the rotation continues, but since the OFF time is as long as 4.5 seconds, the stirring blade 15 can be reversed before the inertial rotation stops. Absent. For this reason, by applying the rotational force of the counter to the clothes that rotate together with the inner tub 14, there is no occurrence of twisting or entanglement, so that generation of wrinkles can be suppressed and drying can be performed uniformly.
[0033]
Then, the tank rotation mode is performed again, and thereafter, the tank rotation mode and the tank free stirring mode are repeated sequentially.With the progress of drying, the time of the tank rotation mode is shortened, and the time of the tank free stirring mode is lengthened. We will increase the frequency of changing clothes and continue drying.
[0034]
When entering the finishing stage near the end of drying, the clutch state as shown in FIG. 3 is switched, the motor 20 is rotated in the reverse direction at the time of 0.4 seconds ON and 1.2 seconds OFF, and the inner tank 14 is fixed. In this state, the tank fixed stirring mode is performed in which the stirring blade 15 is dried while being rotated in the normal direction at a rotation speed of 160 r / min. In the tank fixed agitation mode, without changing the inertial rotation of the inner tub 14, the agitating blade 15 is frequently rotated in the normal direction to quickly change the clothes up and down. Can be finished. Then, the heater 31 is turned off, and a blowing process for driving the drying fan 30 and the cooling fan 36 is performed to cool down the clothes, and then the entire drying process is terminated.
[0035]
As described above, according to the present embodiment, the control means 38 performs the tank-free stirring mode in which the inner tank 14 is not fixed in the drying process and is dried while the stirring blade 15 is rotated in the normal direction. By the rotation of the inner tub 14 when the garment bounced up in the outer circumferential direction of the stirring blade 15 comes into contact with the inner wall side surface of the inner tub 14, the difference in the rotation speed between the garment and the inner tub 14 is reduced and the friction is suppressed. Therefore, while changing the clothes up and down, it is possible to suppress twisting and entanglement, to suppress generation of wrinkles, and to dry uniformly.
[0036]
Further, the control means 38 performs drying mainly in the tank rotation mode in which the clothes are not moved at all in the initial drying stage where the moisture content is easy to see, so that the clothes can be dried without causing any twist or entanglement of the clothes. As the drying rate becomes higher and the clothes become harder to entangle, the tank-free stirring mode gradually shifts to the main process, and while changing the clothes up and down, drying and suppressing twisting and entanglement of the clothes, In the stage of drying, the rotating blades 15 are frequently rotated in the normal direction so that the tank-fixed stirring mode, which allows quick change of clothes, is shifted to the main process, so that warm air is evenly distributed. Since it is applied and dried, the generation of wrinkles can be suppressed and the film can be dried uniformly.
[0037]
Further, the control means 38 controls the ON / OFF of the motor 20 for time in the tank free stirring mode to reverse the stirring blade 15 in the normal direction, and the OFF time is sufficient to stop the inertial rotation of the inner tank 14. Since the length of time is set, the stirring blade 15 is not reversed before the inertial rotation in the same direction of the inner tank 14 generated when the stirring blade 15 is rotated is not completed. For this reason, by applying the rotational force of the counter to the clothes that rotate together with the inner tub 14, there is no occurrence of twisting or entanglement, so that generation of wrinkles can be suppressed and drying can be performed uniformly.
[0038]
In this embodiment, the driving means for directly transmitting the rotation of the rotor to the stirring blade 15 is used. However, the driving means has a reduction mechanism and transmits the rotation of the motor 20 to the stirring blade 15 at a reduced speed. It doesn't matter. Further, the control means 38 controls the motor 20 and the drive means in the drying process, and only the stirring blade 15 with the tank free mode, the tank rotation mode for drying while rotating the inner tank, and the inner tank 14 fixed. However, the present invention is not necessarily limited to this, and the tank-free stirring mode may be combined with at least one other mode.
[0039]
(Example 2)
Next, a second embodiment of the present invention will be described with reference to FIG. The inner tank 14 includes a plurality of magnets 42 on the upper part of the fluid balancer 19. The inner tank rotation detecting means 40 that detects the magnetism of the magnet 42 and detects the rotation of the inner tank 14 is used as the lid 35 of the outer tank 13. It is provided in the vicinity. In addition, the inner tank 14 has a plurality of ribs 41 extending in the vertical direction on the inner wall side surface, and the height of the ribs 41 is 0 in the vicinity of the outer periphery of the stirring blade 15 and increases in a tapered shape as it goes upward. Moreover, the rib 41 at the upper end is cut at a substantially central portion of the inner tub 14, has a height of 0, and increases in a tapered shape as it goes downward. Other configurations are the same as those of the first embodiment, and the same reference numerals are given and the description thereof is omitted.
[0040]
With the above configuration, the control means 38 can turn on the motor 20 after detecting that the inertial rotation of the inner tank 14 stops at the time of forward / reverse switching in the tank free stirring mode. The stirring blade 15 is not reversed before the inertial rotation due to the rotation of the inner tub 14 in the same direction that occurs when the inner tub 14 is rotated is not completed. For this reason, by applying the rotational force of the counter to the clothes that rotate together with the inner tub 14, there is no occurrence of twisting or entanglement, so that generation of wrinkles can be suppressed and drying can be performed uniformly.
[0041]
Further, since the rib 41 extending in the vertical direction is provided on the inner wall side surface of the inner tub 14, the clothes that are spun up in the outer peripheral direction of the stirring blade 15 by the centrifugal force generated by reversing the stirring blade 15 in the normal direction are contained inside. Since the rotation of the inner tub 14 when coming into contact with the inner wall side surface of the tub 14 can be surely caused, the friction between the garment and the inner tub 14 after the rotation can be surely reduced, and the twist of the garment Suppresses entanglement, suppresses generation of wrinkles, and can be dried uniformly. Further, the height of the rib 41 is 0 in the vicinity of the outer periphery of the stirring blade 15 and is increased in a tapered shape as it goes upward. Therefore, the stirring blade 15 is caused by centrifugal force generated by reversing the stirring blade 15 in the normal direction. When the clothes bounced up in the outer peripheral direction of 15 are in contact with the inner wall side surface of the inner tub 14, it is possible to stably cause the inner tub 14 to rotate without being hindered by the lower portion of the rib 41. it can. For this reason, the twist and entanglement of clothing can be suppressed, the generation of wrinkles can be suppressed, and the clothes can be dried uniformly.
[0042]
Further, since the upper end of the rib 41 is cut at a substantially central portion in the height direction of the inner tub 14, the rib 41 does not extend to the upper portion of the inner tub 14. There is no physical or psychological obstacle. Moreover, since the height of the rib 41 at the upper end is 0 and increases in a tapered shape as it goes downward, the clothes existing on the rib 41 are not damaged by being caught by the upper end of the rib 41, Further, it does not cause twisting or entanglement, suppresses the generation of wrinkles, and can be dried uniformly.
[0043]
【The invention's effect】
As described above, according to the washing / drying machine of the present invention , the clothes can be appropriately moved according to the moisture content of the clothes in the drying process, the generation of wrinkles can be suppressed, and the clothes can be dried uniformly .
[Brief description of the drawings]
1 is a cross-sectional view of a washing and drying machine in a tank rotation mode according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of a washing and drying machine in the same tank free stirring mode. Sectional view of FIG. 4 Cross-sectional view of a washing and drying machine in Embodiment 2 of the present invention
DESCRIPTION OF SYMBOLS 11 Housing | casing 13 Outer tank 14 Inner tank 15 Stirring blade 20 Motor 30 Blower for drying (blower means)
31 Heater (heating means)
38 Control means 40 Inner tank rotation detection means 41 Rib

Claims

An outer tub elastically suspended in the housing, an inner tub having a rotation center axis in a substantially vertical direction and rotatably supported in the outer tub, and an agitation provided rotatably at the inner bottom of the inner tub A blade, a motor for rotating the inner tub or the stirring blade, a rotation of the motor being switched to either the inner tub or the stirring wing, and the inner tub not being fixed when the stirring blade is rotating Drive means capable of realizing the above, a blower means for blowing circulating air into the inner tank, a heating means for heating the air blown by the blower means, the motor, the drive means, the blower means, and the heating means A control means for controlling the operation, wherein the control means is a tank-free agitation mode in which the agitation blades are rotated in the normal rotation while the inner tank is not fixed in the drying process, and the inner tank is rotated by the motor. Rotating tank to dry And a tank-fixed stirring mode in which only the stirring blades are rotated while the inner tank is fixed, and the tank is rotated in the initial stage of drying, and then the tank-free stirring mode and the tank rotation are performed. A washing and drying machine that repeats the mode and performs the tank fixed stirring mode near the end of drying.

The laundry dryer according to claim 1, wherein the control means shortens the time in the tank rotation mode and lengthens the time in the tank free stirring mode as the drying progresses in the drying process.

In the tank-free agitation mode, the control means reverses the agitating blade by controlling the time of motor ON / OFF, and the OFF time is set to a time long enough to stop the inertial rotation of the inner tank. The washing / drying machine according to claim 1 or 2.

Comprising an inner tub rotation detection means for detecting the rotation of the inner tub, the control means bath free stirring mode, the normal rotation inversion switching, as the inertial rotation of the inner tub is ON the motor after detecting that the stopping The washing / drying machine according to claim 1 or 2.

The washing / drying machine according to any one of claims 1 to 4, wherein a rib in the vertical direction is provided on an inner wall side surface of the inner tank.

The height of the rib is 0 in the vicinity of the outer periphery of the agitating blade , and is provided in a tapered shape so as to protrude inward from the inner wall of the inner tank , and the height of the upper end of the rib is 0. The washing and drying machine according to claim 5, wherein the washing and drying machine is provided in a tapered shape so as to protrude inward from the inner wall of the inner tank .

The washing / drying machine according to claim 5 or 6, wherein an upper end of the rib is provided so as to be positioned at a substantially central portion in the height direction of the inner tub.