JP3826547B2

JP3826547B2 - Drum washing machine

Info

Publication number: JP3826547B2
Application number: JP05321098A
Authority: JP
Inventors: 裕子皆吉; 勝彦角谷
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1998-03-05
Filing date: 1998-03-05
Publication date: 2006-09-27
Anticipated expiration: 2018-03-05
Also published as: JPH11244569A

Description

【０００１】
【発明の属する技術分野】
本発明は、略水平方向に回転自在に配設した回転ドラム内で洗い、すすぎ、脱水などの各行程を逐次制御するドラム式洗濯機に関するものである。
【０００２】
【従来の技術】
従来、この種のドラム式洗濯機は図４に示すように構成していた。以下、その構成について説明する。
【０００３】
図に示すように、回転ドラム１は、外周部に多数の通水孔２を全面に設け、水受け槽３内に回転自在に配設している。回転ドラム１の回転中心に略水平方向に設けた回転軸４の一端を固定し、回転軸４の他端にドラムプーリー５を固定している。モータ６は、ベルト７によりドラムプーリー５と連結し、回転ドラム１を回転駆動する。回転ドラム１の開口部に蓋８を開閉自在に設けている。
【０００４】
水受け槽３は、洗濯機本体９よりばね体１０で揺動可能に吊り下げ、防振ダンパー１１により脱水起動時の振動が低減され、かつ定常脱水時の振動が洗濯機本体９に伝達されないように防振支持するとともに、脱水時の振動を低減するバランサー１２を設けている。ヒータ１３は、水受け槽３内の洗濯水を加熱するものである。
【０００５】
水受け槽３の下部に排水用のホース１４の一端を接続し、ホース１４の他端を排水ポンプ１５に接続して水受け槽３内の洗濯水を排水するようにしている。給水弁１６は水受け槽３内に水を給水するものである。制御装置１７は、モータ６、ヒータ１３、排水ポンプ１５、給水弁１６などの動作を制御し、洗い、すすぎ、脱水などの一連の行程を逐次制御する。
【０００６】
上記構成において動作を説明する。蓋８を開いて回転ドラム１内に洗濯物を投入し、電源スイッチ（図示せず）をオンした後、制御装置１７に設けたスタートスイッチ（図示せず）を操作して運転を開始すると、給水弁１６が動作して給水し、水位検知手段（図示せず）により所定の水位を検知すると給水を停止し、モータ６を駆動する。洗い行程では、洗濯物に水が含まれるため補給水しながら、回転ドラム１はモータ６によって所定の回転数および所定の時間において正転、停止、反転、停止駆動され、回転ドラム１内の洗濯物は持ち上げられて水面上に落下される。
【０００７】
このとき、ヒータ１３に通電して水受け槽３内の洗濯水を所定の温度に制御しながら加熱する。洗い行程が終了すると、排水ポンプ１５が動作して水受け槽３内の洗濯水を排水する。すすぎ行程においても洗い行程と同様の動作を行う。
【０００８】
脱水行程では、回転ドラム１は高速で回転駆動され、洗濯物は回転ドラム１の外周部に張り付いて遠心脱水される。このとき、回転ドラム１内の洗濯物の片寄り、すなわちアンバランスが生じると、回転ドラム１、水受け槽３などの揺動体は振動するが、脱水起動時は防振ダンパー１１により揺動体の振動を減衰し、定常脱水時は防振ダンパー１１の防振機構により洗濯機本体９に伝達されることはない。
【０００９】
【発明が解決しようとする課題】
このような従来の構成では、洗い、すすぎ行程中の回転ドラム１の駆動は、回転ドラム１内に投入される洗濯物の量に関わらず、水受け槽３の水位と、回転ドラム１の回転数と、回転ドラム１を駆動する稼働率が各々一定条件であった。このため、洗濯物の量が少ない場合でも洗濯物の量が多い時と同等の機械力が洗濯物全体に加わるので、単位布量当たりの機械力は多くなり、よく洗える反面、洗濯物の表面の毛羽立ち、毛玉の発生や、顔料プリント柄のひび割れなどの布傷みが多くなり、仕上がりが悪くなるとともに、洗濯物の表面が荒れてざらついたり、布に張りがでて風合いが硬くなるという問題を有していた。
【００１０】
本発明は上記課題を解決するもので、洗濯物の量が少ない場合でも、洗濯後の洗濯物の布傷みを低減して、仕上がりをよくするとともに、風合いをよくすることを目的としている。
【００１１】
【課題を解決するための手段】
本発明は上記目的を達成するために、洗濯物を収納し回転することで内部に投入された洗濯物が持ち上げられ落下し洗濯物が洗濯される回転ドラムをモータにより駆動し、給水弁により水受け槽内に水を給水し、制御手段によりモータおよび給水弁等の動作を制御して洗い、すすぎ、脱水などの各行程を逐次制御する際に、洗い行程の給水開始前において、回転ドラム内の洗濯物の量を検知するようにし、前記洗濯物の量が第１の所定量より少ないと検知した場合、洗い、すすぎ行程において、水受け槽の水位を洗濯物の量が第１の所定量より多い第２の所定量以上の場合の所定水位より高くするとともに、回転ドラムの回転数を洗濯物の量が第２の所定量以上の場合の所定回転数より高くするものである。
【００１２】
また、洗濯物を収納し回転することで内部に投入された洗濯物が持ち上げられ落下し洗濯物が洗濯される回転ドラムをモータにより駆動し、給水弁により水受け槽内に水を給水し、制御手段によりモータおよび給水弁等の動作を制御して洗い、すすぎ、脱水などの各行程を逐次制御する際に、洗い行程の給水開始前において、回転ドラム内の洗濯物の量を検知するようにし、前記洗濯物の量が第１の所定量より少ないと検知した場合、洗い、すすぎ行程において、水受け槽の水位を洗濯物の量が第１の所定量より多い第２の所定量以上の場合の所定水位より高くするとともに、回転ドラムの回転数を洗濯物の量が第２の所定量以上の場合の所定回転数より低くするものである。
【００１３】
これにより、洗濯物の量が少ない場合でも、洗濯後の洗濯物の布傷みを低減して、仕上がりをよくするとともに、風合いをよくすることができる。
【００１４】
【発明の実施の形態】
本発明の請求項１に記載の発明は、洗濯機本体内に弾性的に支持された水受け槽と、前記水受け槽内に回転自在に配設され回転することで内部に投入された洗濯物が持ち上げられ落下し前記洗濯物が洗濯される回転ドラムと、前記回転ドラムを回転駆動するモータと、前記水受け槽内に水を給水する給水弁と、前記モータおよび給水弁等の動作を制御し洗い、すすぎ、脱水などの各行程を逐次制御する制御手段と、前記水受け槽の水位を検知する水位検知手段とを備え、前記制御手段は、前記洗い行程の給水開始前において、前記回転ドラム内の洗濯物の量を検知するようにし、前記洗濯物の量が第１の所定量未満であると検知したとき、前記洗い、すすぎ行程において、前記水受け槽の水位を前記洗濯物の量が前記第１の所定量より多い第２の所定量以上の場合の所定水位より高くするとともに、前記回転ドラムの回転数を前記洗濯物の量が前記第２の所定量以上の場合の所定回転数より高くするように構成したものであり、洗濯物の量が少ない場合、水受け槽の水位を高くし給水量を増やすことで、洗濯物の間の水がクッションとなり、洗濯物に対する機械力をやわらげることができ、同時に、回転数を上げることで回転ドラムの駆動時に洗濯物を回転ドラム内に張り付きやすくして、水面に落下するときの衝撃を少なくできる。したがって、洗濯後の洗濯物の表面の毛羽立ち、毛玉の発生や、顔料プリント柄のひび割れなどの布傷みを少なくし、仕上がりをよくすることができるとともに、洗濯物の表面の荒れと布の張りを抑えて、風合いをよくすることができる。
【００１５】
請求項２に記載の発明は、洗濯機本体内に弾性的に支持された水受け槽と、前記水受け槽内に回転自在に配設され回転することで内部に投入された洗濯物が持ち上げられ落下し前記洗濯物が洗濯される回転ドラムと、前記回転ドラムを回転駆動するモータと、前記水受け槽内に水を給水する給水弁と、前記モータおよび給水弁等の動作を制御し洗い、すすぎ、脱水などの各行程を逐次制御する制御手段と、前記水受け槽の水位を検知する水位検知手段とを備え、前記制御手段は、前記洗い行程の給水開始前において、回転ドラム内の洗濯物の量を検知するようにし、前記洗濯物の量が第１の所定量未満であると検知したとき、前記洗い、すすぎ行程において、前記水受け槽の水位を前記洗濯物の量が前記第１の所定量より多い第２の所定量以上の場合の所定水位より高くするとともに、前記回転ドラムの回転数を前記洗濯物の量が前記第２の所定量以上の場合の所定回転数より低くするよう構成したものであり、洗濯物の量が少ない場合、水受け槽の水位を高くし給水量を増やすことで、洗濯物の間の水がクッションとなり洗濯物に対する機械力をやわらげることができ、同時に、回転数を下げることで回転ドラムの駆動時に洗濯物が上部位置まで持ち上がらず、回転ドラム内の下方でぐるぐると回るようになり、水面に落下するときの衝撃を少なくできる。したがって、洗濯物の量が少ない場合でも、洗濯後の洗濯物の表面の毛羽立ち、毛玉の発生や、顔料プリント柄のひび割れなどの布傷みを少なくし、仕上がりをよくすることができるとともに、洗濯物の表面の荒れと布の張りを抑えて、風合いをよくすることができる。
【００１６】
【実施例】
以下、本発明の実施例について、図面を参照しながら説明する。なお、従来例と同じ構成のものは同一符号を付して説明を省略する。
【００１７】
（実施例１）
図２および図３に示すように、第１のモータ（モータ）１８は、回転ドラム１を所定の回転数Ｎ１（たとえば、５３ｒｐｍ）で回転させて、洗いまたはすすぎをするものであり、第２のモータ（モータ）１９は、回転ドラム１を所定の回転数Ｎ２（たとえば、１０００ｒｐｍ）で回転させて脱水する。これら第１のモータ１８および第２のモータ１９は、インダクションモータで構成し、それぞれベルト２０、２１を介して従動プーリー２２に連結している。
【００１８】
従動プーリー２２は、２種の減速比を有しており、第１のモータ１８をベルト２０を介して減速比が大きい従動プーリー２２ａと連結し、第２のモータ１９をベルト２１を介して減速比が小さい従動プーリー２２ｂと連結し、回転ドラム１の回転中心に一端を固定した回転軸４の他端に固定している。
【００１９】
制御装置２３は、ヒータ１３、排水ポンプ１５、給水弁１６、第１のモータ１８、第２のモータ１９などの動作を制御するもので、図１に示すように構成している。制御手段２４は、マイクロコンピュータで構成し、双方向性サイリスタなどで構成したパワースイッチング手段２５を介して、ヒータ１３、排水ポンプ１５、給水弁１６、第１のモータ１８、第２のモータ１９などを制御し、洗い、すすぎ、脱水の一連の行程を逐次制御する。
【００２０】
入力設定手段２６は、使用者が必要なコースまたは行程の設定、動作のスタートなどを入力するもので、制御手段２４に入力している。表示手段２７は、入力設定手段２６による設定内容、動作状態などを表示する。水位検知手段２８は、水受け槽３内の水位を検知し、水温検知手段２９は、水受け槽３内の水温を検知して、それぞれ制御手段２４に入力している。回転数検知手段３０は、第１のモータ１８の回転数を検知することで回転ドラム１の回転数を検知し、制御手段２４に入力している。記憶手段３１は、一連の制御に必要なデータなどを記憶している。なお、３２は電源スイッチ、３３は商用電源である。
【００２１】
制御手段２４は、動作を開始したとき、第１のモータ１８で回転ドラム１を所定の回転数Ｎ１（５３ｒｐｍ）で駆動して回転ドラム内の洗濯物をほぐした後、回転ドラム１を第２のモータ１９によって所定の回転数Ｎ３（たとえば６００ｒｐｍ）に立ち上げ、第２のモータ１９の通電を遮断し、回転ドラム１の惰性回転時の回転数の変化、たとえば回転数が５００ｒｐｍから６秒経過後の回転数により回転ドラム１内に投入された洗濯物の量（布量）を検知するようにしている。
【００２２】
上記構成において動作を説明すると、蓋８を開いて回転ドラム１内に洗濯物を投入し、電源スイッチ３２をオンした後、入力設定手段２６により洗い行程から脱水行程まで連続して設定し、スタート・一時停止スイッチ（図示せず）をオンして動作を開始すると、まず、第１のモータ１８で回転ドラム１を所定の回転数Ｎ１（５３ｒｐｍ）で駆動して回転ドラム内の洗濯物をほぐした後、回転ドラム１を第２のモータ１９によって所定の回転数Ｎ３（たとえば６００ｒｐｍ）に立ち上げ、第２のモータ１９の通電を遮断し、回転ドラム１の惰性回転時の回転数の変化、たとえば回転数が５００ｒｐｍから６秒経過後の回転数により回転ドラム１内に投入された洗濯物の量（布量）を検知する。
【００２３】
その後、給水弁１６が動作して給水し、水位検知手段２８により所定の水位を検知すると給水を停止し、第１のモータ１８により回転ドラム１を駆動する。洗い行程では、洗濯物に水が含まれるため補給水しながら、回転ドラム１は駆動され、回転ドラム１内の洗濯物は持ち上げられて水面上に落下される。
【００２４】
このとき、ヒータ１３に通電して水受け槽３内の洗濯水を所定の温度に制御しながら加熱する。洗い行程が終了すると、排水ポンプ１５が動作して水受け槽３内の洗濯水を排水する。すすぎ行程においても洗い行程と同様の動作を行う。脱水行程では、回転ドラム１は高速で回転駆動され、洗濯物は回転ドラム１の外周部に張り付いて遠心脱水される。
【００２５】
回転ドラム１内の洗濯物を第１の所定量（たとえば１．０ｋｇ）未満と検知したとき、洗濯物が第１の所定量より多い第２の所定量（たとえば４．０ｋｇ）以上のときに比べ、洗い、すすぎ行程において、水受け槽３の水位を洗濯物が第２の所定量の場合の所定水位（たとえば１７０ｍｍ）より高い水位（たとえば２００ｍｍ）に上げて給水量を増やすとともに、洗濯物が第２の所定量の場合の所定回転数Ｎ１（５３ｒｐｍ）より高い回転数Ｎ４（たとえば５８ｒｐｍ）で駆動する。
【００２６】
水受け槽３の水位を高くし給水量を増やすことで、洗濯物の間の水がクッションとなり、洗濯物に対する機械力をやわらげることができる。同時に回転数を上げることで、回転ドラム１の駆動時に洗濯物を回転ドラム１内に張り付きやすくして、水面に落下するときの衝撃を少なくできる。
【００２７】
これにより、洗濯後の洗濯物の表面の毛羽立ち、毛玉の発生や、顔料プリント柄のひび割れなどの布傷みを少なくし、仕上がりをよくすることができるとともに、洗濯物の表面の荒れと布の張りを抑えて、風合いをよくすることができる。
【００２８】
（実施例２）
図１における制御手段２４は、回転ドラム１内の洗濯物の量を第１の所定量未満と検知したとき、洗い、すすぎ行程の水受け槽３の水位を洗濯物が第２の所定量の場合の所定水位より高くするとともに、回転ドラム１の回転数を洗濯物が第２の所定量の場合の所定回転数より下げるよう構成している。他の構成は上記実施例１と同じである。
【００２９】
上記構成において動作を説明すると、蓋８を開いて回転ドラム１内に洗濯物を投入し、電源スイッチ３２をオンした後、入力設定手段２６により洗い行程から脱水行程まで連続して設定し、スタート・一時停止スイッチ（図示せず）をオンして動作を開始すると、まず、第１のモータ１８で回転ドラム１を所定の回転数Ｎ１（たとえば５３ｒｐｍ）で駆動して回転ドラム内の洗濯物をほぐした後、回転ドラム１を第２のモータ１９によって所定の回転数Ｎ３（たとえば６００ｒｐｍ）に立ち上げ、第２のモータ１９の通電を遮断し、回転ドラム１の惰性回転時の回転数の変化、たとえば回転数が５００ｒｐｍから６秒経過後の回転数により回転ドラム１内に投入された洗濯物の量（布量）を検知する。
【００３０】
その後、給水弁１６が動作して給水し、水位検知手段２８により所定の水位を検知すると給水を停止し、第１のモータ１８により回転ドラム１を駆動する。洗い行程では、洗濯物に水が含まれるため補給水しながら、回転ドラム１は駆動され、回転ドラム１内の洗濯物は持ち上げられて水面上に落下される。
【００３１】
このとき、ヒータ１３に通電して水受け槽３内の洗濯水を所定の温度に制御しながら加熱する。洗い行程が終了すると、排水ポンプ１５が動作して水受け槽３内の洗濯水を排水する。すすぎ行程においても洗い行程と同様の動作を行う。脱水行程では、回転ドラム１は高速で回転駆動され、洗濯物は回転ドラム１の外周部に張り付いて遠心脱水される。
【００３２】
回転ドラム１内の洗濯物を第１の所定量（たとえば１．０ｋｇ）未満と検知したとき、洗濯物が第１の所定量より多い第２の所定量（たとえば４．０ｋｇ）以上のときに比べ、洗い、すすぎ行程において、水受け槽３の水位を洗濯物が第２の所定量の場合の所定水位（たとえば１７０ｍｍ）より高い水位（たとえば２００ｍｍ）に上げて給水量を増やすとともに、洗濯物が第２の所定量の場合の所定回転数Ｎ１（５３ｒｐｍ）より低い回転数Ｎ５（たとえば４８ｒｐｍ）で駆動する。
【００３３】
水受け槽３の水位を高くし給水量を増やすことで、洗濯物の間の水がクッションとなり、洗濯物に対する機械力をやわらげることができる。同時に回転数を下げることで、回転ドラム１の駆動時に洗濯物が上部位置まで持ち上がらず、回転ドラム１内の下方でぐるぐると回るようになり、水面に落下するときの衝撃を少なくできる。
【００３４】
これにより、洗濯後の洗濯物の表面の毛羽立ち、毛玉の発生や、顔料プリント柄のひび割れなどの布傷みを少なくし、仕上がりをよくすることができるとともに、洗濯物の表面の荒れと布の張りを抑えて、風合いをよくすることができる。
【００３５】
（実施例３）
図１における制御手段２４は、回転ドラム１内の洗濯物の量を第１の所定量未満と検知したとき、洗い、すすぎ行程における回転ドラム１の単位時間当たりに駆動する割合、すなわち稼働率を洗濯物が第２の所定量の場合の所定稼働率より低くしている。他の構成は上記実施例１と同じである。
【００３６】
上記構成において動作を説明すると、蓋８を開いて回転ドラム１内に洗濯物を投入し、電源スイッチ３２をオンした後、入力設定手段２６により洗い行程から脱水行程まで連続して設定し、スタート・一時停止スイッチ（図示せず）をオンして動作を開始すると、まず、第１のモータ１８で回転ドラム１を所定の回転数Ｎ１（たとえば５３ｒｐｍ）で駆動して回転ドラム内の洗濯物をほぐした後、回転ドラム１を第２のモータ１９によって所定の回転数Ｎ３（たとえば６００ｒｐｍ）に立ち上げ、第２のモータ１９の通電を遮断し、回転ドラム１の惰性回転時の回転数の変化、たとえば回転数が５００ｒｐｍから６秒経過後の回転数により回転ドラム１内に投入された洗濯物の量（布量）を検知する。
【００３７】
その後、給水弁１６が動作して給水し、水位検知手段２８により所定の水位を検知すると給水を停止し、第１のモータ１８により回転ドラム１を駆動する。洗い行程では、洗濯物に水が含まれるため補給水しながら、回転ドラム１は駆動され、回転ドラム１内の洗濯物は持ち上げられて水面上に落下される。
【００３８】
このとき、ヒータ１３に通電して水受け槽３内の洗濯水を所定の温度に制御しながら加熱する。洗い行程が終了すると、排水ポンプ１５が動作して水受け槽３内の洗濯水を排水する。すすぎ行程においても洗い行程と同様の動作を行う。脱水行程では、回転ドラム１は高速で回転駆動され、洗濯物は回転ドラム１の外周部に張り付いて遠心脱水される。
【００３９】
回転ドラム１内の洗濯物を第１の所定量（たとえば１．０ｋｇ）未満と検知したとき、洗濯物が少なくとも第１の所定量より多い第２の所定量（たとえば４．０ｋｇ）以上のときに比べ、洗い、すすぎ行程において、洗濯物が第２の所定量の場合の所定の回転ドラム１の単位時間当たりに駆動する割合、すなわち稼働率（たとえば２０秒正転駆動、３秒停止、２０秒反転駆動、３秒停止の場合、稼働率は４０秒／４６秒＝８７％）より低い稼働率（たとえば１０秒回転駆動、１３秒停止の場合、稼働率は２０秒／４６秒＝４３％）で駆動する。
【００４０】
これにより、洗濯物の量が少ない場合に洗濯物に加わる機械力を少なくすることができ、洗濯後の洗濯物の表面の毛羽立ち、毛玉の発生や、顔料プリント柄のひび割れなどの布傷みを少なくし、仕上がりをよくすることができるとともに、洗濯物の表面の荒れと布の張りを抑えて、風合いをよくすることができる。
【００４１】
なお、上記各実施例において、回転ドラム１内の洗濯物の量を第１の所定量（たとえば１．０ｋｇ）未満と検知したとき、第１の所定量より多い第２の所定量（たとえば４．０ｋｇ）以上に比べてドラム回転数およびドラムを駆動する稼働率を変化させたが、ドラム回転数およびドラムを駆動する稼働率は洗濯物の量により複数用意してもよく、要は洗濯物の量が少なくなれば、水位を所定水位より上げるとともにドラム回転数を所定回転数より変化させる、あるいは所定稼働率より低くすればよいものである。
【００４２】
また、同様に、上記各実施例において、洗濯物が第１の所定量（たとえば１．０ｋｇ）と第２の所定量（たとえば４．０ｋｇ）を異なった場合で説明したが、第１の所定量と第２の所定量は同じでもよく（たとえば第１の所定量は３．０ｋｇ、第２の所定量は３．０ｋｇ）、要は洗濯物の量が少ないときと多いときを区分できればよいものである。
【００４３】
【発明の効果】
以上のように本発明の請求項１に記載の発明によれば、洗濯機本体内に弾性的に支持された水受け槽と、前記水受け槽内に回転自在に配設され回転することで内部に投入された洗濯物が持ち上げられ落下し前記洗濯物が洗濯される回転ドラムと、前記回転ドラムを回転駆動するモータと、前記水受け槽内に水を給水する給水弁と、前記モータおよび給水弁等の動作を制御し洗い、すすぎ、脱水などの各行程を逐次制御する制御手段と、前記水受け槽の水位を検知する水位検知手段とを備え、前記制御手段は、前記洗い行程の給水開始前において、前記回転ドラム内の洗濯物の量を検知するようにし、前記洗濯物の量が第１の所定量未満であると検知したとき、前記洗い、すすぎ行程において、前記水受け槽の水位を前記洗濯物の量が前記第１の所定量より多い第２の所定量以上の場合の所定水位より高くするとともに、前記回転ドラムの回転数を前記洗濯物の量が前記第２の所定量以上の場合の所定回転数より高くするように構成したから、洗濯物の量が少ない場合、水受け槽の水位を高くし給水量を増やすことで、洗濯物の間の水がクッションとなり、洗濯物に対する機械力をやわらげることができ、同時に、回転数を上げることで回転ドラムの駆動時に洗濯物を回転ドラム内に張り付きやすくして、水面に落下するときの衝撃を少なくできる。したがって、洗濯後の洗濯物の表面の毛羽立ち、毛玉の発生や、顔料プリント柄のひび割れなどの布傷みを少なくし、仕上がりをよくすることができるとともに、洗濯物の表面の荒れと布の張りを抑えて、風合いをよくすることができる。
【００４４】
また、請求項２に記載の発明によれば、洗濯機本体内に弾性的に支持された水受け槽と、前記水受け槽内に回転自在に配設され回転することで内部に投入された洗濯物が持ち上げられ落下し前記洗濯物が洗濯される回転ドラムと、前記回転ドラムを回転駆動するモータと、前記水受け槽内に水を給水する給水弁と、前記モータおよび給水弁等の動作を制御し洗い、すすぎ、脱水などの各行程を逐次制御する制御手段と、前記水受け槽の水位を検知する水位検知手段とを備え、前記制御手段は、前記洗い行程の給水開始前において、回転ドラム内の洗濯物の量を検知するようにし、前記洗濯物の量が第１の所定量未満であると検知したとき、前記洗い、すすぎ行程において、前記水受け槽の水位を前記洗濯物の量が前記第１の所定量より多い第２の所定量以上の場合の所定水位より高くするとともに、前記回転ドラムの回転数を前記洗濯物の量が前記第２の所定量以上の場合の所定回転数より低くするよう構成したから、洗濯物の量が少ない場合、水受け槽の水位を高くし給水量を増やすことで、洗濯物の間の水がクッションとなり洗濯物に対する機械力をやわらげることができ、同時に、回転数を下げることで回転ドラムの駆動時に洗濯物が上部位置まで持ち上がらず、回転ドラム内の下方でぐるぐると回るようになり、水面に落下するときの衝撃を少なくできる。したがって、洗濯物の量が少ない場合でも、洗濯後の洗濯物の表面の毛羽立ち、毛玉の発生や、顔料プリント柄のひび割れなどの布傷みを少なくし、仕上がりをよくすることができるとともに、洗濯物の表面の荒れと布の張りを抑えて、風合いをよくすることができる。
【図面の簡単な説明】
【図１】本発明の第１の実施例のドラム式洗濯機のブロック回路図
【図２】同ドラム式洗濯機の断面図
【図３】同ドラム式洗濯機の一部切欠した背面図
【図４】従来のドラム式洗濯機の断面図
【符号の説明】
１回転ドラム
３水受け槽
９洗濯機本体
１８第１のモータ（モータ）
１９第２のモータ（モータ）
２４制御手段
２８水位検知手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drum-type washing machine that sequentially controls each process such as washing, rinsing, and dewatering in a rotating drum that is rotatably arranged in a substantially horizontal direction.
[0002]
[Prior art]
Conventionally, this type of drum-type washing machine is configured as shown in FIG. Hereinafter, the configuration will be described.
[0003]
As shown in the figure, the rotating drum 1 is provided with a large number of water passage holes 2 on the entire outer periphery thereof, and is rotatably disposed in the water receiving tank 3. One end of a rotary shaft 4 provided in a substantially horizontal direction is fixed to the rotation center of the rotary drum 1, and a drum pulley 5 is fixed to the other end of the rotary shaft 4. The motor 6 is connected to the drum pulley 5 by a belt 7 and rotationally drives the rotary drum 1. A lid 8 is provided at the opening of the rotary drum 1 so as to be freely opened and closed.
[0004]
The water receiving tub 3 is suspended from the washing machine main body 9 so as to be swingable by the spring body 10, the vibration at the time of dehydration activation is reduced by the anti-vibration damper 11, and the vibration at the time of steady dehydration is not transmitted to the washing machine main body 9. Thus, a balancer 12 is provided that supports vibration isolation and reduces vibration during dehydration. The heater 13 heats the washing water in the water receiving tub 3.
[0005]
One end of a drainage hose 14 is connected to the lower part of the water receiving tank 3, and the other end of the hose 14 is connected to a drainage pump 15 to drain the washing water in the water receiving tank 3. The water supply valve 16 supplies water into the water receiving tank 3. The control device 17 controls operations of the motor 6, the heater 13, the drain pump 15, the water supply valve 16, and the like, and sequentially controls a series of processes such as washing, rinsing, and dehydration.
[0006]
The operation in the above configuration will be described. After opening the lid 8 and putting the laundry into the rotating drum 1 and turning on the power switch (not shown), the operation is started by operating the start switch (not shown) provided in the control device 17, When the water supply valve 16 operates to supply water and a predetermined water level is detected by a water level detection means (not shown), the water supply is stopped and the motor 6 is driven. In the washing process, since the laundry contains water, the revolving drum 1 is driven to rotate forward, stop, reverse, and stop at a predetermined rotation speed and a predetermined time by the motor 6 while supplying water. Objects are lifted and dropped onto the water surface.
[0007]
At this time, the heater 13 is energized and heated while controlling the washing water in the water receiving tub 3 at a predetermined temperature. When the washing process is completed, the drainage pump 15 operates to drain the washing water in the water receiving tank 3. The same operation as the washing step is performed in the rinsing step.
[0008]
In the dehydration process, the rotary drum 1 is driven to rotate at a high speed, and the laundry is attached to the outer peripheral portion of the rotary drum 1 and centrifugally dehydrated. At this time, when the laundry in the rotating drum 1 is shifted, that is, when an imbalance occurs, the swinging bodies such as the rotating drum 1 and the water receiving tub 3 vibrate. The vibration is attenuated and is not transmitted to the washing machine main body 9 by the vibration isolating mechanism of the vibration isolating damper 11 during steady dehydration.
[0009]
[Problems to be solved by the invention]
In such a conventional configuration, the driving of the rotating drum 1 during the washing and rinsing process is performed regardless of the amount of laundry put into the rotating drum 1 and the rotation of the rotating drum 1. The number and the operation rate for driving the rotary drum 1 were respectively constant. For this reason, even when the amount of laundry is small, the mechanical force equivalent to that when there is a large amount of laundry is applied to the entire laundry, so the mechanical force per unit fabric amount increases and it can be washed well, but the surface of the laundry The problem is that the surface of the laundry becomes rough and the texture becomes stiff and the texture becomes harder, as the fabric becomes more flawed, such as fuzzing, fluffing, and cracks in the pigment print pattern. Had.
[0010]
An object of the present invention is to solve the above-described problems, and it is an object of the present invention to reduce the fabric damage after washing to improve the finish and improve the texture even when the amount of laundry is small.
[0011]
[Means for Solving the Problems]
For the present invention to achieve the above object, a rotary drum laundry dropped laundry is put into the inside is lifted to by accommodated rotating laundry is laundered driven by the motor, the water supply valve When water is supplied into the water receiving tank and the operation of the motor and water supply valve is controlled by the control means to wash, rinse, and dewater, etc. , the rotary drum before the start of water supply in the washing process. the amount of laundry inside so as to detect the amount of the case where the amount of the laundry is sensed to be less than the first predetermined amount, wash, and have contact to the rinsing cycle, the laundry the water level of the water tub is first The level of the rotating drum is set higher than the predetermined level in the case of the second predetermined amount or more which is larger than the predetermined amount of 1, and the rotational speed of the rotating drum is made higher than the predetermined number of rotations in the case where the amount of the laundry is the second predetermined amount or more. is there.
[0012]
In addition, the rotating drum in which the laundry thrown into the interior is lifted, dropped, and washed by washing is driven by a motor, and water is supplied into the water receiving tank by a water supply valve. When controlling each operation of washing, rinsing, dehydration, etc. by controlling the operation of the motor and the water supply valve by the control means, the amount of laundry in the rotating drum is detected before the water supply of the washing step is started. And when it is detected that the amount of the laundry is less than the first predetermined amount, in the washing and rinsing process, the water level in the water receiving tub is equal to or greater than the second predetermined amount in which the amount of the laundry is greater than the first predetermined amount. as well as higher than the predetermined level when the amount of laundry the rotation speed of the rotary drum is one which below a predetermined rotational speed in the case of the more quantitative the second place.
[0013]
Thereby, even when the amount of the laundry is small, it is possible to reduce the cloth damage of the laundry after washing, improve the finish, and improve the texture.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there is provided a water receiving tank elastically supported in the washing machine main body, and a laundry put in the water receiving tank by being rotatably disposed in the water receiving tank . A rotary drum in which an object is lifted and dropped and the laundry is washed , a motor that rotationally drives the rotary drum, a water supply valve that supplies water into the water receiving tub, and operations of the motor and the water supply valve controlled washing, rinsing, and control means for sequentially controlling each stroke such as dehydration, and a water level detecting means for detecting the water level of the water receiving tank, before Symbol control means, in the water supply before starting the washing step , so as to detect the amount of laundry in the rotary within the drum, when the amount of the laundry is sensed to be less than the first predetermined amount, the washing, the rinsing operation, the water level of the water tub the amount of laundry is greater than the first predetermined amount As well as higher than the predetermined level when the predetermined amount or more of, which amount of the laundry the rotation speed of the rotary drum is configured to be higher than a predetermined rotational speed in the case of more than a predetermined amount of the second When the amount of laundry is small, increasing the water level in the water receiving tank and increasing the amount of water supply can cushion the water between the laundry and reduce the mechanical force on the laundry. By raising, the laundry can be easily stuck in the rotating drum when the rotating drum is driven, and the impact when falling on the water surface can be reduced. Therefore, after washing, the surface of the laundry can be fuzzed, fluffed, and scratches such as cracks in the pigment print pattern can be reduced to improve the finish, and the surface of the laundry can be rough and the fabric can be stretched. Can be suppressed and the texture can be improved.
[0015]
According to the second aspect of the present invention, the water receiving tub elastically supported in the washing machine main body, and the laundry put in the water receiving tub by being rotatably disposed in the water receiving tub are lifted. A rotary drum that is dropped and washed with the laundry, a motor that rotationally drives the rotary drum, a water supply valve that supplies water into the water receiving tub, and operations of the motor and the water supply valve are controlled and washed. A control means for sequentially controlling each process such as rinsing and dehydration, and a water level detecting means for detecting the water level of the water receiving tank, the control means in the rotating drum before the start of water supply in the washing process . so as to detect the amount of laundry, when the amount of the laundry is detected that the first is less than the predetermined amount, the washing, the rinsing cycle, the water level of the water receiving tank the amount of the laundry the the first of more than a predetermined amount the second predetermined amount than The amount of the addition to higher than a predetermined level when, which amount of the laundry the rotation speed of the rotary drum is configured to be lower than a predetermined rotational speed in the case of a predetermined amount or more of the second, laundry If there is little, increasing the water level in the water receiving tank and increasing the amount of water supplied can cushion the water between the laundry and cushion the mechanical force on the laundry, and at the same time reduce the rotational speed of the rotating drum. When the laundry is driven, the laundry does not lift up to the upper position, but turns around when it is in the lower part of the rotating drum, so that the impact when falling on the water surface can be reduced. Therefore, even when the amount of laundry is small, the surface of the laundry after washing can be less fuzzed, fluffed, and scratches such as cracks in the pigment print pattern can be reduced, improving the finish and washing. The texture of the surface of the object and the tension of the cloth can be suppressed to improve the texture .
[0016]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. In addition, the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description.
[0017]
Example 1
As shown in FIGS. 2 and 3, the first motor (motor) 18 rotates and rotates or rotates the rotary drum 1 at a predetermined rotational speed N1 (for example, 53 rpm). The motor 19 is dehydrated by rotating the rotary drum 1 at a predetermined rotational speed N2 (for example, 1000 rpm). The first motor 18 and the second motor 19 are constituted by induction motors, and are connected to a driven pulley 22 via belts 20 and 21, respectively.
[0018]
The driven pulley 22 has two kinds of reduction ratios. The first motor 18 is connected to a driven pulley 22a having a large reduction ratio via a belt 20, and the second motor 19 is reduced via a belt 21. It is connected to a driven pulley 22b having a small ratio, and is fixed to the other end of the rotating shaft 4 having one end fixed to the rotation center of the rotating drum 1.
[0019]
The control device 23 controls operations of the heater 13, the drain pump 15, the water supply valve 16, the first motor 18, the second motor 19, and the like, and is configured as shown in FIG. The control means 24 is constituted by a microcomputer, and via a power switching means 25 constituted by a bidirectional thyristor or the like, the heater 13, the drain pump 15, the water supply valve 16, the first motor 18, the second motor 19, etc. And a series of steps of washing, rinsing and dewatering are sequentially controlled.
[0020]
The input setting means 26 is used by the user to input necessary course or process settings, start of operation, etc., and is input to the control means 24. The display means 27 displays the setting content, operation state, etc. by the input setting means 26. The water level detection means 28 detects the water level in the water receiving tank 3, and the water temperature detection means 29 detects the water temperature in the water receiving tank 3 and inputs it to the control means 24. The rotation speed detection means 30 detects the rotation speed of the first drum 18 by detecting the rotation speed of the first motor 18 and inputs it to the control means 24. The storage means 31 stores data necessary for a series of controls. In addition, 32 is a power switch and 33 is a commercial power source.
[0021]
When the control unit 24 starts operation, the first motor 18 drives the rotary drum 1 at a predetermined rotational speed N1 (53 rpm) to loosen the laundry in the rotary drum, and then the rotary drum 1 is moved to the second state. The motor 19 is started up to a predetermined rotational speed N3 (for example, 600 rpm), the second motor 19 is turned off, and the rotational speed changes during inertial rotation of the rotary drum 1, for example, the rotational speed has elapsed from 500 rpm for 6 seconds. The amount (cloth amount) of the laundry put into the rotary drum 1 is detected based on the subsequent rotational speed.
[0022]
The operation in the above configuration will be described. After the lid 8 is opened, the laundry is put into the rotary drum 1, the power switch 32 is turned on, and the input setting means 26 continuously sets from the washing process to the dehydration process, and starts. When the operation is started by turning on a temporary stop switch (not shown), the rotary drum 1 is first driven at a predetermined rotational speed N1 (53 rpm) by the first motor 18 to loosen the laundry in the rotary drum. After that, the rotating drum 1 is raised to a predetermined rotating speed N3 (for example, 600 rpm) by the second motor 19, the energization of the second motor 19 is interrupted, and the rotating speed changes during inertial rotation of the rotating drum 1. For example, the amount (cloth amount) of the laundry put into the rotating drum 1 is detected based on the number of rotations after 6 seconds from 500 rpm.
[0023]
Thereafter, the water supply valve 16 operates to supply water, and when the water level detecting means 28 detects a predetermined water level, the water supply is stopped and the first motor 18 drives the rotary drum 1. In the washing process, since the laundry contains water, the rotary drum 1 is driven while supplying water, and the laundry in the rotary drum 1 is lifted and dropped onto the water surface.
[0024]
At this time, the heater 13 is energized and heated while controlling the washing water in the water receiving tub 3 at a predetermined temperature. When the washing process is completed, the drainage pump 15 operates to drain the washing water in the water receiving tank 3. The same operation as the washing step is performed in the rinsing step. In the dehydration process, the rotary drum 1 is driven to rotate at a high speed, and the laundry is attached to the outer peripheral portion of the rotary drum 1 and centrifugally dehydrated.
[0025]
When the laundry in the rotating drum 1 is detected to be less than a first predetermined amount (for example, 1.0 kg), and the laundry is a second predetermined amount (for example, 4.0 kg) or more greater than the first predetermined amount. In comparison, in the washing and rinsing process, the water level of the water receiving tub 3 is increased to a level (for example, 200 mm) higher than a predetermined level (for example, 200 mm) when the laundry is the second predetermined amount, and the amount of water supply is increased. Is driven at a rotational speed N4 (for example, 58 rpm) higher than the predetermined rotational speed N1 (53 rpm) in the case of the second predetermined amount.
[0026]
By increasing the water level of the water receiving tank 3 and increasing the amount of water supplied, the water between the laundry becomes a cushion, and the mechanical force on the laundry can be reduced. By simultaneously increasing the number of rotations, the laundry can easily stick to the rotating drum 1 when the rotating drum 1 is driven, and the impact when falling on the water surface can be reduced.
[0027]
As a result, the surface of the laundry after washing can be reduced in the appearance of fuzz, fluff and cracks in the pigment print pattern, and the finish can be improved. The tension can be suppressed and the texture can be improved.
[0028]
(Example 2)
When the control means 24 in FIG. 1 detects that the amount of laundry in the rotary drum 1 is less than the first predetermined amount, the water level of the water receiving tub 3 in the washing and rinsing process is set to the second predetermined amount. The rotational speed of the rotary drum 1 is configured to be lower than the predetermined rotational speed when the laundry has the second predetermined amount. Other configurations are the same as those of the first embodiment.
[0029]
The operation in the above configuration will be described. After the lid 8 is opened, the laundry is put into the rotary drum 1, the power switch 32 is turned on, and the input setting means 26 continuously sets from the washing process to the dehydration process, and starts. When the operation is started by turning on a temporary stop switch (not shown), first, the rotary drum 1 is driven at a predetermined rotational speed N1 (for example, 53 rpm) by the first motor 18 to wash the laundry in the rotary drum. After loosening, the rotary drum 1 is raised to a predetermined rotation speed N3 (for example, 600 rpm) by the second motor 19, the current supply to the second motor 19 is cut off, and the rotation speed changes during inertial rotation of the rotation drum 1. For example, the amount (cloth amount) of the laundry put into the rotating drum 1 is detected based on the number of rotations after 6 seconds from 500 rpm.
[0030]
Thereafter, the water supply valve 16 operates to supply water, and when the water level detecting means 28 detects a predetermined water level, the water supply is stopped and the first motor 18 drives the rotary drum 1. In the washing process, since the laundry contains water, the rotary drum 1 is driven while supplying water, and the laundry in the rotary drum 1 is lifted and dropped onto the water surface.
[0031]
At this time, the heater 13 is energized and heated while controlling the washing water in the water receiving tub 3 at a predetermined temperature. When the washing process is completed, the drainage pump 15 operates to drain the washing water in the water receiving tank 3. The same operation as the washing step is performed in the rinsing step. In the dehydration process, the rotary drum 1 is rotationally driven at a high speed, and the laundry is attached to the outer peripheral portion of the rotary drum 1 and centrifugally dehydrated.
[0032]
When the laundry in the rotating drum 1 is detected to be less than a first predetermined amount (for example, 1.0 kg), and the laundry is a second predetermined amount (for example, 4.0 kg) or more greater than the first predetermined amount. In comparison, in the washing and rinsing process, the water level of the water receiving tub 3 is increased to a level (for example, 200 mm) higher than a predetermined level (for example, 200 mm) when the laundry is the second predetermined amount, and the amount of water supply is increased. Is driven at a rotational speed N5 (for example, 48 rpm) lower than the predetermined rotational speed N1 (53 rpm) in the case of the second predetermined amount.
[0033]
By increasing the water level of the water receiving tank 3 and increasing the amount of water supplied, the water between the laundry becomes a cushion, and the mechanical force on the laundry can be reduced. By simultaneously reducing the rotational speed, the laundry does not lift up to the upper position when the rotary drum 1 is driven, but can be rotated around the lower portion of the rotary drum 1 to reduce the impact when falling on the water surface.
[0034]
As a result, the surface of the laundry after washing can be reduced in the appearance of fuzz, fluff and cracks in the pigment print pattern, and the finish can be improved. The tension can be suppressed and the texture can be improved.
[0035]
Example 3
When the control means 24 in FIG. 1 detects that the amount of laundry in the rotating drum 1 is less than the first predetermined amount, the control means 24 drives the rotating drum 1 per unit time in the washing and rinsing process, that is, the operation rate. It is lower than the predetermined operation rate when the laundry is the second predetermined amount. Other configurations are the same as those of the first embodiment.
[0036]
The operation in the above configuration will be described. After the lid 8 is opened, the laundry is put into the rotary drum 1, the power switch 32 is turned on, and the input setting means 26 continuously sets from the washing process to the dehydration process, and starts. When the operation is started by turning on a temporary stop switch (not shown), first, the rotary drum 1 is driven at a predetermined rotational speed N1 (for example, 53 rpm) by the first motor 18 to wash the laundry in the rotary drum. After loosening, the rotary drum 1 is raised to a predetermined rotation speed N3 (for example, 600 rpm) by the second motor 19, the current supply to the second motor 19 is cut off, and the rotation speed changes during inertial rotation of the rotation drum 1. For example, the amount (cloth amount) of the laundry put into the rotating drum 1 is detected based on the number of rotations after 6 seconds from 500 rpm.
[0037]
Thereafter, the water supply valve 16 operates to supply water, and when the water level detecting means 28 detects a predetermined water level, the water supply is stopped and the first motor 18 drives the rotary drum 1. In the washing process, since the laundry contains water, the rotary drum 1 is driven while supplying water, and the laundry in the rotary drum 1 is lifted and dropped onto the water surface.
[0038]
At this time, the heater 13 is energized and heated while controlling the washing water in the water receiving tub 3 at a predetermined temperature. When the washing process is completed, the drainage pump 15 operates to drain the washing water in the water receiving tank 3. The same operation as the washing step is performed in the rinsing step. In the dehydration process, the rotary drum 1 is rotationally driven at a high speed, and the laundry is attached to the outer peripheral portion of the rotary drum 1 and centrifugally dehydrated.
[0039]
When the laundry in the rotating drum 1 is detected to be less than a first predetermined amount (for example, 1.0 kg), the laundry is at least a second predetermined amount (for example, 4.0 kg) that is greater than the first predetermined amount. In comparison with the washing and rinsing process, the rate of driving the predetermined rotating drum 1 per unit time when the laundry is in the second predetermined amount, that is, the operation rate (for example, 20 seconds normal rotation drive, 3 seconds stop, 20 In the case of second reversal drive, in the case of 3 second stop, the operation rate is 40 seconds / 46 seconds = 87%. For example, in the case of 10 second rotation drive and 13 second stop, the operation rate is 20 seconds / 46 seconds = 43%. ) To drive.
[0040]
This reduces the mechanical force applied to the laundry when the amount of laundry is small, and prevents fabric damage such as fuzz and fluffing on the surface of the laundry after washing and cracks in the pigment print pattern. It can be reduced to improve the finish, and the texture of the laundry and fabric tension can be suppressed to improve the texture.
[0041]
In each of the above embodiments, when it is detected that the amount of laundry in the rotary drum 1 is less than a first predetermined amount (for example, 1.0 kg), a second predetermined amount (for example, 4 that is larger than the first predetermined amount). The drum rotation speed and the operation rate for driving the drum were changed as compared with the above, but the drum rotation speed and the operation rate for driving the drum may be prepared depending on the amount of laundry. If the amount of water decreases, the water level is raised from the predetermined water level and the drum rotational speed is changed from the predetermined rotational speed, or lower than the predetermined operating rate.
[0042]
Similarly, in each of the above-described embodiments, the case where the laundry differs between the first predetermined amount (for example, 1.0 kg) and the second predetermined amount (for example, 4.0 kg) has been described. The fixed amount and the second predetermined amount may be the same (for example, the first predetermined amount is 3.0 kg, and the second predetermined amount is 3.0 kg). In short, it is only necessary to distinguish when the amount of laundry is small and large. Is.
[0043]
【The invention's effect】
As described above, according to the first aspect of the present invention, the water receiving tub elastically supported in the washing machine body and the water receiving tub are rotatably disposed and rotated. A rotating drum in which the laundry put into the interior is lifted and dropped and the laundry is washed , a motor that rotationally drives the rotating drum, a water supply valve that supplies water into the water receiving tub, the motor, and wash controls the operation such as water supply valve, rinsing, and control means for sequentially controlling each stroke such as dehydration, and a water level detecting means for detecting the water level of the water receiving tank, before Symbol control means, said wash in the water supply before starting stroke, so as to detect the amount of laundry in the rotary within the drum, when the amount of the laundry is sensed to be less than the first predetermined amount, the washing, the rinsing operation, the water wherein the water level of the tub is the amount of the laundry first As well as higher than the predetermined level when the second predetermined amount or more larger than the predetermined amount, so that the amount of the laundry the rotation speed of the rotary drum is higher than a predetermined rotational speed in the case of more than a predetermined amount of the second When the amount of laundry is small, by increasing the water level of the water receiving tank and increasing the amount of water supply, the water between the laundry becomes a cushion, and the mechanical force on the laundry can be eased at the same time By increasing the number of rotations, the laundry can be easily stuck in the rotating drum when the rotating drum is driven, and the impact when falling on the water surface can be reduced. Therefore, after washing, the surface of the laundry can be fuzzed, fluffed, and scratches such as cracks in the pigment print pattern can be reduced to improve the finish, and the surface of the laundry can be rough and the fabric can be stretched. Can be suppressed and the texture can be improved.
[0044]
According to the invention described in claim 2, the water receiving tub elastically supported in the washing machine main body, and the water receiving tub is rotatably disposed in the water receiving tub so as to be put inside. A rotary drum in which the laundry is lifted and dropped and the laundry is washed, a motor that rotationally drives the rotary drum, a water supply valve that supplies water into the water receiving tub, and operations of the motor and the water supply valve Control means for sequentially controlling each process such as washing, rinsing, dehydration, and the like, and a water level detection means for detecting the water level of the water receiving tank, the control means, before the start of water supply of the washing process, so as to detect the amount of laundry in the rotary drum, when the amount of the laundry is detected that the first is less than the predetermined amount, the washing, the rinsing operation, the water level of the water tub laundry the amount of is greater than the first predetermined amount Together with higher than a predetermined water level in the case of more than a predetermined amount, since the amount of the laundry the rotation speed of the rotary drum is configured to be lower than a predetermined rotational speed in the case of a predetermined amount or more of the second, laundry If the amount of water is small, increasing the water level in the water receiving tank and increasing the amount of water supplied can cushion the water between the laundry and reduce the mechanical force on the laundry. When the drum is driven, the laundry does not lift up to the upper position, but turns around in the lower part of the rotating drum, so that the impact when falling on the water surface can be reduced. Therefore, even when the amount of laundry is small, the surface of the laundry after washing can be less fuzzed, fluffed, and scratches such as cracks in the pigment print pattern can be reduced, improving the finish and washing. The texture of the surface of the object and the tension of the cloth can be suppressed to improve the texture .
[ Brief description of the drawings]
FIG. 1 is a block circuit diagram of a drum type washing machine according to a first embodiment of the present invention. FIG. 2 is a sectional view of the drum type washing machine. FIG. 3 is a partially cutaway rear view of the drum type washing machine. Fig. 4 Cross-sectional view of a conventional drum type washing machine [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotating drum 3 Water receiving tank 9 Washing machine main body 18 1st motor (motor)
19 Second motor (motor)
24 Control means 28 Water level detection means

Claims

Washers water tub elastically supported in the body, rotatably laundry charged into the interior by arranged to rotate is lifted and dropped the laundry is laundered to the water receiving tank A rotating drum, a motor for rotating the rotating drum, a water supply valve for supplying water into the water receiving tank, and the operations of the motor and the water supply valve are controlled, washed, rinsed, and dewatered. and a control means for sequentially controlling the water level detecting means for detecting the water level of the water receiving tank, before Symbol control means, before start of the water supply of the wash step, sensing the amount of laundry in the rotary within the drum to make it, when the amount of the laundry is detected that the first is less than the predetermined amount, the washing, the rinsing cycle, than the predetermined amount amount the first of the laundry the water level of the water tub predetermined level when many of the second predetermined amount or more With higher drum type washing machine the amount of the laundry the rotation speed of the rotary drum is configured to be higher than a predetermined rotational speed in the case of a predetermined amount or more of the second.

Washers water tub elastically supported in the body, rotatably laundry charged into the interior by arranged to rotate is lifted and dropped the laundry is laundered to the water receiving tank A rotating drum, a motor for rotating the rotating drum, a water supply valve for supplying water into the water receiving tank, and the operations of the motor and the water supply valve are controlled, washed, rinsed, and dewatered. and a control means for sequentially controlling the water level detecting means for detecting the water level of the water receiving tank, before Symbol control means, before start of the water supply of the wash step, sensing the amount of laundry in the rotary within the drum to make it, when the amount of the laundry is detected that the first is less than the predetermined amount, the washing, rinsing and have contact to the stroke, the water level of the water receiving tank the amount of the laundry the first place predetermined level of not less than the second predetermined amount greater than quantitative With higher drum type washing machine the amount of the laundry the rotation speed of the rotary drum is configured such that below a predetermined rotational speed in the case of a predetermined amount or more of the second.