JP6782652B2 - Washing machine - Google Patents

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JP6782652B2
JP6782652B2 JP2017049349A JP2017049349A JP6782652B2 JP 6782652 B2 JP6782652 B2 JP 6782652B2 JP 2017049349 A JP2017049349 A JP 2017049349A JP 2017049349 A JP2017049349 A JP 2017049349A JP 6782652 B2 JP6782652 B2 JP 6782652B2
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rotation speed
drum
imbalance
threshold value
washing machine
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JP2018149219A (en
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優 金内
優 金内
真理 黒澤
真理 黒澤
涼平 山本
涼平 山本
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Hitachi Global Life Solutions Inc
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Description

本発明は,洗濯,脱水を行う洗濯機に係る。 The present invention relates to a washing machine that performs washing and dehydration.

ドラム式洗濯機は,筐体が水を溜める外槽を内包し,外槽が衣類を投入するドラムを内包しており,洗いと,すすぎと,脱水の各工程を行う。脱水工程始めの低速回転数域では,ドラムの回転数を段階的に上昇させながら,衣類をドラムに張り付けていき,ドラムに張り付いた衣類のアンバランスを判定するアンバランス検出手段により,検出されたアンバランスが設定した閾値より小さいと判定された場合は,ドラムの回転数を上昇させる。また,アンバランスが閾値より大きいと判定された場合は,ドラムの回転を停止または,回転数を低下させ,アンバランスを修正する。 In a drum-type washing machine, the housing contains an outer tub for storing water, and the outer tub contains a drum for putting clothes in, and each process of washing, rinsing, and dehydration is performed. In the low-speed rotation speed range at the beginning of the dehydration process, the clothes are attached to the drum while the rotation speed of the drum is gradually increased, and the clothes are detected by the unbalance detection means for determining the imbalance of the clothes attached to the drum. If it is determined that the imbalance is less than the set threshold value, the drum rotation speed is increased. If it is determined that the imbalance is larger than the threshold value, the rotation of the drum is stopped or the rotation speed is reduced to correct the imbalance.

アンバランスの検出手段および修正の従来技術には,特許4961195号公報(特許文献1)がある。この公報には,ドラムの回転数を3段階に増加させ,第1の回転数で所定時間維持し,次に第1の回転数から第2の回転数まで上昇させ,第2の回転数で所定時間維持し,更に第2の回転数から第3の回転数まで上昇させ第3の回転数で所定時間維持する制御を行い,アンバランス検出手段よりアンバランスを検出し,第1の回転数で検出したアンバランスが第1の閾値より大きい場合は回転数を第1の回転数以下に落とし,再度第1の回転数まで上昇させアンバランスの検出を行い,第2の回転数で検出したアンバランスが第2の閾値より大きい場合は回転数を第1の回転数以下に落とし,再度第1の回転数まで上昇させアンバランスの検出を行い,第3の回転数で検出したアンバランスが第3の閾値より大きい場合は,一旦回転を止め第1の回転数より前から再開するような制御を行うと記載されている。 Japanese Patent No. 4961195 (Patent Document 1) is a conventional technique for detecting imbalance and modifying it. In this publication, the rotation speed of the drum is increased in three stages, maintained at the first rotation speed for a predetermined time, then increased from the first rotation speed to the second rotation speed, and at the second rotation speed. It is maintained for a predetermined time, further increased from the second rotation speed to the third rotation speed, and controlled to be maintained for a predetermined time at the third rotation speed, the imbalance is detected by the imbalance detecting means, and the first rotation speed is detected. If the imbalance detected in is larger than the first threshold value, the rotation speed is lowered to the first rotation speed or less, the rotation speed is increased to the first rotation speed again to detect the imbalance, and the imbalance is detected at the second rotation speed. If the imbalance is larger than the second threshold, the rotation speed is lowered to the first rotation speed or less, the rotation speed is increased to the first rotation speed again to detect the imbalance, and the imbalance detected at the third rotation speed is If it is larger than the third threshold value, it is described that the control is performed so that the rotation is temporarily stopped and restarted before the first rotation speed.

特許第4961195号公報Japanese Patent No. 4961195

特許文献1は,アンバランスが第1の閾値や第2に閾値よりも大きい場合は,第1の回転数以下に低下させる。そのため,衣類全体がアンバランスとなって,アンバランスが大きい場合は,回転数を低下させて,衣類の一部のアンバランスを修正するだけでは,衣類全体のアンバランスの修正が困難となり,アンバランスの修正時間が長くなり,脱水時間と消費電力量が増加する。また,第3の回転数におけるアンバランスが第3の閾値よりも大きな場合は回転を停止する。そのため,衣類の一部がアンバランスとなり,アンバランスが小さい場合は,回転を停止すると均一に張り付いていた衣類も落下するので,再度回転数を上昇させる際に,均一に張り付いていた衣類がアンバランスとなる恐れがあるので,アンバランスの修正時間が長くなり,脱水時間と消費電力量が増加する。 In Patent Document 1, when the imbalance is larger than the first threshold value or the second threshold value, it is lowered to the first rotation speed or less. Therefore, if the entire garment becomes unbalanced and the unbalance is large, it becomes difficult to correct the unbalance of the entire garment simply by lowering the rotation speed and correcting the unbalance of a part of the garment. The balance correction time becomes longer, and the dehydration time and power consumption increase. If the imbalance at the third rotation speed is larger than the third threshold value, the rotation is stopped. Therefore, a part of the clothes becomes unbalanced, and if the unbalance is small, the clothes that are evenly attached will fall when the rotation is stopped. Therefore, when the rotation speed is increased again, the clothes that are evenly attached will also fall. Since there is a risk of imbalance, the imbalance correction time becomes longer, and the dehydration time and power consumption increase.

なお,近年は洗濯容量の大容量化で大物衣類(例えば毛布など)を複数枚組合わせた洗濯が可能となっており,大物衣類を複数枚組合わせると,ドラムの容積に対して,大物衣類の占める容積が大きくなり,大物衣類がドラムの内周面に広がりにくくなる。そのため,大物衣類同士が重なったり,大物衣類の一部が重なりやすくなることで,大きなアンバランスや小さなアンバランスが発生し,アンバランスに応じた修正を行う必要がある。 In recent years, the washing capacity has been increased to enable washing by combining multiple large clothes (for example, blankets), and when multiple large clothes are combined, the large clothes are compared with the volume of the drum. The volume occupied by the drum becomes large, and it becomes difficult for large clothes to spread on the inner peripheral surface of the drum. Therefore, large clothing overlaps with each other, or a part of large clothing tends to overlap, resulting in a large imbalance or a small imbalance, and it is necessary to make corrections according to the imbalance.

上記課題を解決する手段の一例を挙げるならば,回転軸が水平または,奥側が下になるように傾斜した回転自在なるドラムと,該ドラムを内包すると共に洗濯水を溜める外槽と,該外槽を内包する筺体と前記ドラム内の洗濯物のアンバランスを検出するアンバランスの判定手段を備えた洗濯機において,前記ドラムを脱水開始回転数,第1の回転数と段階的に上昇させて,該第1の回転数を維持して,前記アンバランスの判定手段でアンバランスを判定して,前記アンバランスの判定手段には,第1のアンバランス判定と,第2のアンバランス判定を設け,前記第1のアンバランス判定には第1の閾値を設け,前記第2のアンバランス判定には第2の閾値を設け,前記第1の閾値は前記第2の閾値よりも大きな値として,前記第1の回転数のアンバランスが前記第1の閾値より大きい場合は,前記ドラムの回転数を停止して,再び前記ドラムの回転数を前記第1の回転数まで上昇させ,前記第1の回転数のアンバランスが前記第2の閾値より大きい場合は,前記ドラムの回転数を前記脱水開始回転数より大きく,前記第1の回転数より小さな回転数に低下させ,所定時間維持し,再び前記第1の回転数に上昇させることを特徴とする洗濯機。 To give an example of means for solving the above problems, a rotatable drum whose rotation axis is horizontal or inclined so that the back side is downward, an outer tub containing the drum and storing washing water, and an outer tub. In a washing machine equipped with a housing containing a tub and an imbalance determination means for detecting the imbalance of the laundry in the drum, the drum is gradually increased to the dehydration start rotation speed and the first rotation speed. , The unbalance is determined by the unbalance determination means while maintaining the first rotation speed, and the unbalance determination means includes a first unbalance determination and a second unbalance determination. A first threshold value is provided for the first imbalance determination, a second threshold value is provided for the second imbalance determination, and the first threshold value is set to a value larger than the second threshold value. If the imbalance of the first rotation speed is larger than the first threshold value, the rotation speed of the drum is stopped, the rotation speed of the drum is increased again to the first rotation speed, and the first rotation speed is increased. When the imbalance of the number of revolutions of 1 is larger than the second threshold value, the number of revolutions of the drum is reduced to a number higher than the number of rotations to start dehydration and smaller than the number of revolutions of the first, and maintained for a predetermined time. , A washing machine characterized in that the number of revolutions is increased to the first number of revolutions again.

本発明によれば,脱水工程の低速回転数域において,アンバランスを判定する回転数に複数の閾値を設けることで,アンバランスの状態に応じて,アンバランスの一部または全体を修正することができ,アンバランスの修正時間を短くすることで,脱水時間と消費電力量の増加を抑制するドラム式洗濯機及びドラム式洗濯乾燥機を提供することができる。 According to the present invention, in the low-speed rotation speed range of the dehydration process, a part or the whole of the imbalance is corrected according to the state of the imbalance by setting a plurality of thresholds for the rotation speed for determining the unbalance. By shortening the unbalance correction time, it is possible to provide a drum-type washing machine and a drum-type washer-dryer that suppress an increase in dehydration time and power consumption.

本発明の実施の形態例に係るドラム式洗濯機の斜視図である。It is a perspective view of the drum type washing machine which concerns on embodiment of this invention. 本発明の実施の形態例に係るドラム式洗濯機の内部構造を示す右側面から見た中央断面図である。It is a central sectional view seen from the right side which shows the internal structure of the drum type washing machine which concerns on embodiment of this invention. 第一の実施例における脱水工程のフローチャートである。It is a flowchart of the dehydration process in 1st Example. 第一の実施例における低速回転数域の毛布の張り付きを示す模式図である。It is a schematic diagram which shows the sticking of the blanket in the low-speed rotation speed range in the 1st Example. 第二の実施例における脱水工程のフローチャートである。It is a flowchart of the dehydration process in 2nd Example. 第二の実施例における第1のアンバランス判定がNoの場合のフローチャートである。It is a flowchart when the first imbalance determination in the 2nd Example is No. 第二の実施例における第2のアンバランス判定が第2の閾値より大きいの場合のフローチャートである。It is a flowchart in the case where the 2nd imbalance determination in the 2nd Example is larger than the 2nd threshold value. 第二の実施例におけ第3アンバランス判定が第3の閾値より大きい場合のフローチャートである。It is a flowchart in the case where the 3rd imbalance determination is larger than the 3rd threshold value in the 2nd Example.

以下,本発明を実施するための形態例について,図面を参照して説明する。なお,上下方向,左右方向,前後方向については図1に示す方向とする。 Hereinafter, examples of embodiments for carrying out the present invention will be described with reference to the drawings. The vertical direction, the horizontal direction, and the front-rear direction are the directions shown in FIG.

(実施例1)
図1は本発明におけるドラム式洗濯機100の斜視図,図2はドラム式洗濯機100の内部構造を示す側面図をそれぞれ示す。図1と図2を用いて,ドラム式洗濯機100の構成と動作を説明する。
(Example 1)
FIG. 1 is a perspective view of the drum-type washing machine 100 according to the present invention, and FIG. 2 is a side view showing the internal structure of the drum-type washing machine 100. The configuration and operation of the drum-type washing machine 100 will be described with reference to FIGS. 1 and 2.

図1に示すドラム式洗濯機100の外郭を構成する筐体1は,ベース1aの上に取付けられており,左右の側板1b(図1では右の側板のみを図示),前面カバー1c,背面カバー1d(図2参照),上面カバー1e,下部前面カバー1fで構成されている。上面カバー1eには,水道栓からのドラム式洗濯機100に給水するための給水ホース接続口30を設けている。筐体1は,ベース1aを含めて箱状の外枠を形成し,外枠として十分な強度を有している。 The housing 1 constituting the outer shell of the drum-type washing machine 100 shown in FIG. 1 is mounted on the base 1a, and has left and right side plates 1b (only the right side plate is shown in FIG. 1), a front cover 1c, and a back surface. It is composed of a cover 1d (see FIG. 2), a top cover 1e, and a lower front cover 1f. The top cover 1e is provided with a water supply hose connection port 30 for supplying water to the drum-type washing machine 100 from the tap. The housing 1 forms a box-shaped outer frame including the base 1a, and has sufficient strength as the outer frame.

ドア2は,前面カバー1cの略中央に設けた衣類を出し入れするための投入口(図示せず)を塞ぐためのもので,前面カバー1cに設けたヒンジで開閉可能に支持されている。ドア2は,ドア開放取手2aを引くことでロック機構(図示せず)が外れて開き,ドア2を前面カバー1cに押し付けることでロックされて閉じる。前面カバー1cは,後述する外槽11の開口部と略同心に,衣類を出し入れするための円形の開口部を有している。 The door 2 is provided at substantially the center of the front cover 1c to close an insertion port (not shown) for taking in and out clothes, and is supported by a hinge provided on the front cover 1c so as to be openable and closable. The door 2 is opened by pulling the door opening handle 2a to release the lock mechanism (not shown), and is locked and closed by pressing the door 2 against the front cover 1c. The front cover 1c has a circular opening for putting in and taking out clothes substantially concentrically with the opening of the outer tank 11 described later.

筐体1の上部に設けた操作・表示パネル3は,電源スイッチ4,操作スイッチ5,表示器6を備える。操作・表示パネル3は筐体1の上部に設けた上補強部材13a(図2参照)に備えられている制御装置7(図2参照)に電気的に接続している。制御装置7には冷却ファン(図示せず)が取付けられている。ベース1aの近傍には,排水を行うための排水ホース14(図2参照)が取付けられている。 The operation / display panel 3 provided on the upper part of the housing 1 includes a power switch 4, an operation switch 5, and a display 6. The operation / display panel 3 is electrically connected to the control device 7 (see FIG. 2) provided in the upper reinforcing member 13a (see FIG. 2) provided on the upper part of the housing 1. A cooling fan (not shown) is attached to the control device 7. A drain hose 14 (see FIG. 2) for draining water is attached in the vicinity of the base 1a.

図2に示すドラム式洗濯機100の筐体1の内部には,水を溜める外槽11が備えられる。外槽11の前方は,洗濯容量の大容量化の際に,筺体1と外槽11の空間を確保するために,テーパー部を有している。外槽11の下部は,筐体1に固定された左右一対のサスペンション26(コイルばねとダンパで構成)で防振支持されている。 An outer tub 11 for storing water is provided inside the housing 1 of the drum-type washing machine 100 shown in FIG. The front of the outer tub 11 has a tapered portion in order to secure a space between the housing 1 and the outer tub 11 when the washing capacity is increased. The lower part of the outer tank 11 is vibration-proof supported by a pair of left and right suspensions 26 (composed of a coil spring and a damper) fixed to the housing 1.

外槽11の上部は,外槽11の前後方向への倒れ込みを抑制するために,二組の懸架手段(コイルばねで構成)が接続されている。第一の懸架手段8は,外槽11の前方に備えられる外槽側前ばねホルダー10aに一端を接続して,第一の懸架手段8の他端は,前補強部材13に備えられる筐体側前ばねホルダー10に接続して構成される。 Two sets of suspension means (composed of coil springs) are connected to the upper portion of the outer tank 11 in order to prevent the outer tank 11 from falling in the front-rear direction. One end of the first suspension means 8 is connected to the outer tank side front spring holder 10a provided in front of the outer tank 11, and the other end of the first suspension means 8 is on the housing side provided in the front reinforcing member 13. It is configured by connecting to the front spring holder 10.

第二の懸架手段9は,外槽側前ばねホルダー10aよりも後方に備えられた外槽側後ばねホルダー10cに一端を接続して,第二の懸架手段9の他端は,外槽側後ばねホルダー10cよりも後方且つ上方に備えられる筐体側後ばねホルダー10bに接続して構成される。 One end of the second suspension means 9 is connected to the outer tank side rear spring holder 10c provided behind the outer tank side front spring holder 10a, and the other end of the second suspension means 9 is on the outer tank side. It is configured by connecting to the housing-side rear spring holder 10b provided behind and above the rear spring holder 10c.

外槽側前ばねホルダー10a,筺体側前ばねホルダー10,外槽側後ばねホルダー10c及び筺体側後ばねホルダー10bの材料に,ポリプロピレンや繊維強化プラスチックといった強度が高い樹脂を用いることで,ばねホルダーに懸架手段から力が加わっても,ばねホルダーが強度を有しているため,ばねホルダーの破損を防止できる。 By using high-strength resin such as polypropylene or fiber reinforced plastic for the material of the outer tank side front spring holder 10a, the housing side front spring holder 10, the outer tank side rear spring holder 10c, and the housing side rear spring holder 10b, the spring holder Even if a force is applied from the suspension means, the spring holder has strength, so that the spring holder can be prevented from being damaged.

外槽11は,衣類を収納するためのドラム21を内包する。外槽11の後方には,ドラム21を回転させるためのモータ22を備える。モータ22は,回転軸となるシャフト22aが外槽11を貫通し,ドラム21と結合している。モータ22が駆動すると,ドラム21は,正転(ドラム式洗濯機100を正面から見て時計回り),逆転(ドラム式洗濯機100を正面から見て反時計回り)の両方向に回転駆動される。図2に示すドラム21の回転軸Azは,ドラム式洗濯機100の前方から後方に向けて水平または,奥側が下になるように傾斜している(図2は奥側が下になるように傾斜している)。 The outer tank 11 contains a drum 21 for storing clothes. A motor 22 for rotating the drum 21 is provided behind the outer tank 11. In the motor 22, a shaft 22a serving as a rotation shaft penetrates the outer tank 11 and is coupled to the drum 21. When the motor 22 is driven, the drum 21 is rotationally driven in both forward rotation (clockwise when the drum type washing machine 100 is viewed from the front) and reverse rotation (counterclockwise when the drum type washing machine 100 is viewed from the front). .. The rotation axis AZ of the drum 21 shown in FIG. 2 is inclined from the front to the rear of the drum type washing machine 100 so as to be horizontal or the back side is downward (FIG. 2 is inclined so that the back side is downward). doing).

ドラム21の内周面には,ドラム21内の洗濯水を外槽11に排水するための複数個の脱水孔21bや,ドラム21の周方向に間隔をおいて,ドラム21内に投入された衣類を持ち上げるための複数個(図2では1個のみを図示)のバッフル23が設けられている。バッフル23は,ドラム21の前後方向に延在している。 On the inner peripheral surface of the drum 21, a plurality of dehydration holes 21b for draining the washing water in the drum 21 to the outer tub 11 and a plurality of dehydration holes 21b are put into the drum 21 at intervals in the circumferential direction of the drum 21. A plurality of baffles 23 (only one is shown in FIG. 2) for lifting clothes are provided. The baffle 23 extends in the front-rear direction of the drum 21.

ドラム21の前端には,円筒状の流体バランサ21cが設けられている。外槽11は,前方を開口として,後方を閉じた有底の略円筒を形成している。この外槽11の開口部と筺体1の投入口は,前後方向に伸縮しやすいベローズ16により接続される。ベローズ16は,環状のパッキンである弾性体のエラストマーや合成ゴム材料で成形され,ドア2を閉めることでドラム21を水封する。また,筐体1の投入口,外槽11の開口部,ドラム21の開口部は連通しており,ドア2を開くことでドラム21内への衣類の出し入れが可能となる。なお,外槽11は,開口部を含む側と,モータ22の取り付けられる側とに分割することができる。 A cylindrical fluid balancer 21c is provided at the front end of the drum 21. The outer tank 11 forms a bottomed substantially cylinder with the front side open and the rear side closed. The opening of the outer tank 11 and the inlet of the housing 1 are connected by a bellows 16 that easily expands and contracts in the front-rear direction. The bellows 16 is formed of an elastic elastomer or a synthetic rubber material which is an annular packing, and the drum 21 is water-sealed by closing the door 2. Further, the insertion port of the housing 1, the opening of the outer tank 11, and the opening of the drum 21 are in communication with each other, and by opening the door 2, clothes can be taken in and out of the drum 21. The outer tank 11 can be divided into a side including the opening and a side to which the motor 22 is attached.

外槽11には,給水弁15ならびに洗剤容器12を介して給水ホース17の一端を接続している。給水弁15を開くことで,給水ホース接続口30から外槽11内に洗濯水の供給を行う。 One end of the water supply hose 17 is connected to the outer tank 11 via a water supply valve 15 and a detergent container 12. By opening the water supply valve 15, washing water is supplied into the outer tub 11 from the water supply hose connection port 30.

外槽11の下部に備えられた排水ホース14は排水経路に循環ポンプ27,糸屑フィルタ28,排水弁14aが設けてあり,排水弁14aを閉じて給水することで外槽11に洗濯水を溜め,排水弁14aを開いて外槽11内の洗濯水を機外へ排水する。 The drain hose 14 provided in the lower part of the outer tub 11 is provided with a circulation pump 27, a lint filter 28, and a drain valve 14a in the drain path, and the washing water is supplied to the outer tub 11 by closing the drain valve 14a and supplying water. The reservoir and the drain valve 14a are opened to drain the washing water in the outer tub 11 to the outside of the machine.

外槽11の下方には,外槽11の振動振幅を検知する振動センサ18が備えられており,振動センサ18の値が予め設定した所定値を超えると,脱水運転を停止する。 A vibration sensor 18 for detecting the vibration amplitude of the outer tank 11 is provided below the outer tank 11, and when the value of the vibration sensor 18 exceeds a predetermined value set in advance, the dehydration operation is stopped.

上記構成において,ドラム式洗濯機100の動作を説明する。電源スイッチ4を押すと,ドラム式洗濯機100が起動する。ドア開放取手2aを引いて,ドア2を開いてドラム21内に衣類を投入し,ドア2を閉じた後,操作スイッチ5を操作することで,運転を開始する。運転を開始すると,ドラム21が回転して,注水前の衣類の重量を算出する。尚,モータ22の回転数と電流値に基づいて,ドラム21内の衣類の重量を算出する。算出した衣類の重量に基づいて,投入する洗剤量を表示器6に表示する。洗剤容器12内に所定量の洗剤量を投入後,初めに洗い工程を開始する。洗い工程において,給水弁15を開いて,給水ホース接続口30から供給した水を給水ホース17ならびに洗剤容器12を介して,洗剤と共に外槽11内に給水する。この時,循環ポンプ27内で未溶解の洗剤と水が強力に撹拌され,効率よく洗剤を溶かし,高濃度の洗剤液を生成することができる。この動作を所定時間実行した後,ドラム21が正転,停止,逆転,停止を繰り返す洗い動作を所定時間行う。このとき,衣類がバッフル23によって持ち上げられ落下する。洗い工程を行った後,脱水工程を実行する。まず,排水弁14aを開いて,外槽11内の水が排水ホース14を介してドラム式洗濯機100の外に排水する。次に,衣類のドラム21の内周面への張り付け動作を行う。ドラム21を低速回転数(例えば50r/min)で一方向に回転させ,洗い工程で水を含んだ衣類をドラム21の回転時にバッフル23によって持ち上げ,落下する際にドラム21の内周面に広げる。次に,ドラム21の回転数を徐々に上昇させて,ドラム21の内周面に衣類を張り付かせる。衣類がドラム21の内周面に張り付くと,ドラム21の回転数をさらに上昇させて,外槽11や筐体1の共振回転数を通過しながら,ドラム21が目標回転数(例えば,900r/min)に到達する。その後,ドラム21が所定時間回転することで,衣類に含まれる水を遠心脱水する。 In the above configuration, the operation of the drum type washing machine 100 will be described. When the power switch 4 is pressed, the drum-type washing machine 100 is activated. The operation is started by pulling the door opening handle 2a, opening the door 2, putting clothes into the drum 21, closing the door 2, and then operating the operation switch 5. When the operation is started, the drum 21 rotates to calculate the weight of the clothes before water injection. The weight of clothing in the drum 21 is calculated based on the rotation speed and the current value of the motor 22. Based on the calculated weight of the clothes, the amount of detergent to be added is displayed on the display 6. After putting a predetermined amount of detergent into the detergent container 12, the washing process is started first. In the washing step, the water supply valve 15 is opened, and the water supplied from the water supply hose connection port 30 is supplied to the outer tank 11 together with the detergent through the water supply hose 17 and the detergent container 12. At this time, the undissolved detergent and water are vigorously agitated in the circulation pump 27, and the detergent can be efficiently dissolved to generate a high-concentration detergent solution. After executing this operation for a predetermined time, the drum 21 performs a washing operation of repeating forward rotation, stop, reverse rotation, and stop for a predetermined time. At this time, the clothes are lifted by the baffle 23 and fall. After performing the washing process, perform the dehydration process. First, the drain valve 14a is opened, and the water in the outer tub 11 is drained to the outside of the drum-type washing machine 100 via the drain hose 14. Next, the operation of attaching the clothes to the inner peripheral surface of the drum 21 is performed. The drum 21 is rotated in one direction at a low rotation speed (for example, 50 r / min), and clothes containing water are lifted by the baffle 23 when the drum 21 is rotated and spread on the inner peripheral surface of the drum 21 when the drum 21 is dropped. .. Next, the rotation speed of the drum 21 is gradually increased to attach clothing to the inner peripheral surface of the drum 21. When the clothing sticks to the inner peripheral surface of the drum 21, the rotation speed of the drum 21 is further increased, and the drum 21 passes through the resonance rotation speed of the outer tank 11 and the housing 1 while the drum 21 has a target rotation speed (for example, 900r /). min) is reached. After that, the drum 21 is rotated for a predetermined time to centrifugally dehydrate the water contained in the clothes.

なお,ドラム21の内周面に張り付いた衣類が片寄ってアンバランスとなっていると,ドラム21の回転数の脈動(回転変動)や外槽11の共振回転数時に外槽11の振動振幅が大きくなる。ドラム21の回転変動や外槽11の振動振幅が所定の値よりも大きい場合は,アンバランスを小さく修正するために,ドラム21の回転数を低下または停止して,ドラム21を正転と逆転を繰り返すほぐし動作や,注水を行い,衣類のアンバランスを修正する。 If the clothing attached to the inner peripheral surface of the drum 21 is offset and unbalanced, the vibration amplitude of the outer tank 11 at the time of the pulsation (rotational fluctuation) of the rotation speed of the drum 21 and the resonance rotation speed of the outer tank 11. Becomes larger. When the rotation fluctuation of the drum 21 or the vibration amplitude of the outer tank 11 is larger than a predetermined value, the rotation speed of the drum 21 is reduced or stopped to correct the imbalance to be small, and the drum 21 is rotated in the forward direction and in the reverse direction. Repeat the loosening operation and inject water to correct the imbalance of clothing.

この脱水工程を行った後,給水弁15を開いて,給水ホース接続口30から供給した水を給水ホース17ならびに洗剤容器12を介して,外槽11内に給水する。外槽11内に給水を行った後,すすぎ工程を行う。このすすぎ工程においては,前述した洗い工程と同様に,ドラム21が正転,停止,反転,停止の動作を繰り返す。このとき,バッフル23によって持ち上げられた衣類が落下する攪拌動作を繰り返す,すすぎ動作を所定時間行う。 After performing this dehydration step, the water supply valve 15 is opened, and the water supplied from the water supply hose connection port 30 is supplied into the outer tank 11 via the water supply hose 17 and the detergent container 12. After supplying water to the outer tank 11, a rinsing process is performed. In this rinsing step, the drum 21 repeats the operations of normal rotation, stop, reverse rotation, and stop as in the washing step described above. At this time, the rinsing operation is performed for a predetermined time by repeating the stirring operation in which the clothes lifted by the baffle 23 are dropped.

その後,前述した脱水工程およびすすぎ工程を所定回数繰り返し,最終脱水工程に移行する。この最終脱水工程における脱水時間は,前述の脱水工程より長く設定してある。 After that, the above-mentioned dehydration step and rinse step are repeated a predetermined number of times to shift to the final dehydration step. The dehydration time in this final dehydration step is set longer than that in the above-mentioned dehydration step.

ドラム式洗濯乾燥機は,ドラム式洗濯機100に温風ヒータ,温風ファンなどを備え(いずれも図示せず),最終脱水工程後に,洗い時よりもさらに低速で洗濯乾燥ドラムを回転させながら,温風を衣類に吹き付けて,衣類を乾燥する。 The drum-type washer-dryer is equipped with a hot-air heater, a hot-air fan, etc. in the drum-type washing machine 100 (none of them are shown), and after the final dehydration process, the washing / drying drum is rotated at a lower speed than during washing. , Blow warm air onto the clothes to dry them.

次に,脱水工程の例を図3と図4を用いて説明する。 Next, an example of the dehydration step will be described with reference to FIGS. 3 and 4.

脱水運転は外槽11の共振回転数前の低速回転数域と外槽11の共振回転数や目標回転数に向かう高速回転数域に分別できる。 The dehydration operation can be separated into a low-speed rotation speed region before the resonance rotation speed of the outer tank 11 and a high-speed rotation speed region toward the resonance rotation speed and the target rotation speed of the outer tank 11.

まず,脱水工程始めの低速回転数域について説明する。脱水開始(200)すると,ドラム21を正転させて,衣類の片寄りや絡みを解消するほぐし動作(201)を行う。ほぐし動作(201)後は,ドラム21の回転を一旦停止(202)して,ドラム21を逆転させながら,ドラム21の回転数を脱水開始回転数(ω0(例えば50r/min))まで一定速度(例えば3r/min/s)で上昇(203)させ,毛布を持ち上げていく(図4A参照)。ω0では,図4Bに示す様に毛布がドラム21の上方に持ち上げられて,ドラム21の上方から落下することで,毛布をドラム21の内周面に広がり,毛布の一部がドラム21の内周面に張付き始める。ω0で所定時間維持(204)(例えば5s)して,毛布をドラム21の内周面に広げていく。その後,ドラム21の回転数を一定速度(例えば3r/min/s)で上昇させて,毛布を広げながらドラム21の内周面に張り付く(図4C参照)第1の回転数(ω(例えば80r/min))まで上昇させる(205)。ω1に到達すると,ωを所定時間維持(206)して,アンバランスの判定を行う。 First, the low-speed rotation speed range at the beginning of the dehydration process will be described. When the dehydration is started (200), the drum 21 is rotated in the normal direction to perform a loosening operation (201) to eliminate the deviation and entanglement of the clothes. After the loosening operation (201), the rotation of the drum 21 is temporarily stopped (202), and the rotation speed of the drum 21 is kept constant until the dehydration start rotation speed (ω 0 (for example, 50r / min)) while reversing the drum 21. Raise (203) at a speed (eg 3r / min / s) to lift the blanket (see FIG. 4A). At ω 0 , as shown in FIG. 4B, the blanket is lifted above the drum 21 and falls from above the drum 21, so that the blanket spreads on the inner peripheral surface of the drum 21 and a part of the blanket is formed on the drum 21. It begins to stick to the inner peripheral surface. The blanket is spread over the inner peripheral surface of the drum 21 by maintaining the blanket at ω 0 for a predetermined time (204) (for example, 5 s). After that, the rotation speed of the drum 21 is increased at a constant speed (for example, 3 r / min / s), and the blanket is spread and attached to the inner peripheral surface of the drum 21 (see FIG. 4C). The first rotation speed (ω 1 (for example, for example). Raise to 80r / min)) (205). When ω 1 is reached, ω 1 is maintained for a predetermined time (206) to determine imbalance.

アンバランスの判定は,ω1の維持中(206)の回転変動の大きさで行う。回転変動は,アンバランスとなった毛布をドラム21の下方から上方に上げる速度と,上方から下方に下げる速度の差から求める。そのため,回転変動でアンバランスを判定するためには,アンバランスとなった毛布を1回転させる必要があり,ωの維持時間(206)はドラム21が1回転する時間とする。本実施例ではωに80r/minを与えているため,ωの維持時間(206)は,0.75秒必要となる。より好ましくはωの維持時間(206)を0.75秒よりも大きくすることで,アンバランスの誤判定を防ぐことができる。ωのアンバランスの判定は,第1のアンバランス判定(207)と第2のアンバランス判定(208)で行い,第1のアンバランス判定(207)の第1の閾値は,第2のアンバランス判定(208)の第2の閾値よりも大きい値とする。 The imbalance is judged by the magnitude of the rotational fluctuation during the maintenance of ω 1 . The rotation fluctuation is obtained from the difference between the speed at which the unbalanced blanket is raised from the bottom to the top of the drum 21 and the speed at which the blanket is lowered from the top to the bottom. Therefore, in order to determine the imbalance by the rotation fluctuation, it is necessary to rotate the unbalanced blanket once , and the maintenance time (206) of ω 1 is the time for the drum 21 to rotate once. Since 80 r / min is given to ω 1 in this embodiment, the maintenance time (206) of ω 1 is required to be 0.75 seconds. More preferably, by setting the maintenance time (206) of ω 1 to be longer than 0.75 seconds, it is possible to prevent erroneous determination of imbalance. The unbalance of ω 1 is determined by the first unbalance determination (207) and the second unbalance determination (208), and the first threshold value of the first unbalance determination (207) is the second. The value is set to be larger than the second threshold value of the unbalance determination (208).

ωのアンバランスが第1のアンバランス判定(207),または第2のアンバランス判定(208)で,第1の閾値や第2の閾値よりも大きい場合は,アンバランスの修正(リトライ)を行う。 If the imbalance of ω 1 is larger than the first threshold value or the second threshold value in the first imbalance determination (207) or the second imbalance determination (208), the imbalance is corrected (retry). I do.

ωのアンバランスが第1のアンバランス判定(207)で第1の閾値よりも大きくなった場合は,毛布全体がドラム21に均一に広がっていない状態や毛布同士が重なっているため,アンバランスが大きな状態となっている。アンバランスが大きい場合は,毛布全体の張り付けを修正する必要があるため,ドラム21の回転を停止(215)して,ドラム21に張り付いていた毛布を落下させる。ドラム21の回転を停止させる速度をωからωに上昇させる速度(本実施例では,3r/min/s)よりも速くすることで,アンバランスの修正時間を短くすることができる。ドラム21の回転停止後,ドラム21から落下した毛布のほぐし動作(201)を行い,毛布の片寄りや絡まりを解消させることで,アンバランスの修正を行う。その後,ドラム21の回転数をωまで上昇(205)させて,再度第1のアンバランス判定(207)を行う。
ω1のアンバランスが第2のアンバランス判定(208)で第2の閾値よりも大きくなった場合は,毛布の一部が重なったことでアンバランスとなっている。このアンバランスの場合,毛布の一部が重なった箇所を広げて,アンバランスを修正する必要があるため,ドラム21の回転数をω0よりも高く,ω未満の回転数(ω)に低下(213)させる。ドラム21の回転数をω低下させる速度をωからωに上昇させる速度(本実施例では,3r/min/s)よりも速くすることで,アンバランスの修正時間を短くすることができる。ωをω0よりも高くすることで,遠心力と毛布の釣合いの関係より,ドラム21の内周面に均一に張り付いた毛布はドラム21の内周面に張り付けたまま,ドラム21の回転中心に近いアンバランスとなっている毛布の一部の重なりを広げることができため,アンバランスを修正できる。ωを所定時間維持した後,ドラム21の回転数をωまで上昇(214)させて,再度第1のアンバランス判定(207)を行う。
When the imbalance of ω 1 becomes larger than the first threshold value in the first imbalance determination (207), it means that the entire blanket is not evenly spread on the drum 21 or the blankets overlap each other. The balance is great. If the imbalance is large, it is necessary to correct the sticking of the entire blanket, so the rotation of the drum 21 is stopped (215) and the blanket stuck to the drum 21 is dropped. The imbalance correction time can be shortened by making the speed at which the rotation of the drum 21 is stopped faster than the speed at which the rotation of the drum 21 is stopped from ω 0 to ω 1 (3 r / min / s in this embodiment). After the rotation of the drum 21 is stopped, the blanket that has fallen from the drum 21 is loosened (201) to eliminate the bias and entanglement of the blanket, thereby correcting the imbalance. After that, the rotation speed of the drum 21 is increased to ω 1 (205), and the first imbalance determination (207) is performed again.
When the imbalance of ω 1 becomes larger than the second threshold value in the second unbalance determination (208), it is unbalanced because a part of the blanket overlaps. In the case of this imbalance, it is necessary to widen the overlapped part of the blanket to correct the imbalance, so the rotation speed of the drum 21 is higher than ω 0 and less than ω 1n ). (213). The imbalance correction time can be shortened by making the speed at which the rotation speed of the drum 21 is lowered by ω n faster than the speed at which the speed is raised from ω 0 to ω 1 (3 r / min / s in this embodiment). it can. By making ω n higher than ω 0, the blanket that is evenly attached to the inner peripheral surface of the drum 21 remains attached to the inner peripheral surface of the drum 21 due to the balance between the centrifugal force and the blanket. Since the overlap of a part of the blanket that is unbalanced near the center of rotation can be widened, the imbalance can be corrected. After maintaining ω n for a predetermined time, the rotation speed of the drum 21 is increased to ω 1 (214), and the first imbalance determination (207) is performed again.

毛布のアンバランスが第1のアンバランス判定(207)と第2のアンバランス判定(208)の閾値よりも小さくなるまで,アンバランスの修正を繰り返す。 The correction of the imbalance is repeated until the blanket imbalance becomes smaller than the threshold values of the first imbalance determination (207) and the second imbalance determination (208).

ωで判定したアンバランスが第1のアンバランス判定(207)と第2のアンバランス判定(208)の閾値よりも小さい場合は,ドラム21の回転数を上昇(209)させて,外槽11の共振を通過して,目標回転数に向かう高速回転数域に移行する。 If the imbalance determined by ω 1 is smaller than the thresholds of the first unbalance determination (207) and the second unbalance determination (208), the rotation speed of the drum 21 is increased (209) to increase the outer tank. It passes through the resonance of 11 and shifts to the high-speed rotation speed region toward the target rotation speed.

高速回転数域では,外槽11の共振を通過するため,外槽11の備えられた振動センサ18で第3のアンバランス判定(210)を行う。アンバランスが振動センサ18の第3の閾値よりも小さい場合は,ドラム21の回転数が目標回転数に到達しているか判定(211)を行い,到達している場合は脱水を終了(212)する。ドラム21の回転数が目標回転数まで到達していない場合は,目標回転数に到達するまで,ドラム21の回転数上昇(209)と第3のアンバランス判定(210)を繰り返す。 In the high-speed rotation speed range, since the resonance of the outer tank 11 is passed, the vibration sensor 18 provided in the outer tank 11 makes a third unbalance determination (210). When the imbalance is smaller than the third threshold value of the vibration sensor 18, it is determined whether the rotation speed of the drum 21 has reached the target rotation speed (211), and if it has reached, dehydration is completed (212). To do. If the rotation speed of the drum 21 has not reached the target rotation speed, the rotation speed increase (209) of the drum 21 and the third imbalance determination (210) are repeated until the target rotation speed is reached.

高速回転数域のアンバランスが振動センサ18の閾値よりも大きくなった場合,毛布の水が抜けて,低速回転数域からアンバランスが変化しているため,毛布全体のアンバランスを修正する必要がある。そのため,ωの第1のアンバランス判定(207)でリトライした時と同様に,ドラム21の回転数を一旦停止(215)して,毛布全体のアンバランスの修正を行う。 If the imbalance in the high-speed rotation speed range becomes larger than the threshold value of the vibration sensor 18, the blanket is drained and the imbalance changes from the low-speed rotation speed range, so it is necessary to correct the imbalance in the entire blanket. There is. Therefore, the rotation speed of the drum 21 is temporarily stopped (215) to correct the imbalance of the entire blanket, as in the case of retrying in the first unbalance determination (207) of ω 1 .

以上のように,脱水運転の低速回転数域で,アンバランスの大きさに応じたリトライ方法を設けることで,リトライ時間の増加を抑制することができ,脱水の運転時間の増加や消費電力量の増加を抑制することができる。 As described above, by providing a retry method according to the magnitude of imbalance in the low speed range of dehydration operation, it is possible to suppress the increase in retry time, increase the dehydration operation time, and consume power. Can be suppressed from increasing.

なお,本実施の形態例に示すアンバランスの判定や修正方法は,ドラム式洗濯乾燥機にも適用できる。 The imbalance determination and correction method shown in the present embodiment can also be applied to a drum-type washer-dryer.

(実施例2)
次に実施例2について図5,図6,図7及び図8を参照して詳細に説明する。
(Example 2)
Next, the second embodiment will be described in detail with reference to FIGS. 5, 6, 7, and 8.

なお,ドラム式洗濯機100については,実施例1と基本的に同様な構成であるので,以下では,異なる部分について説明する。 Since the drum type washing machine 100 has basically the same configuration as that of the first embodiment, different parts will be described below.

脱水を開始(300)すると,リトライ回数Nに設定値としてN(301)とリターン回数M(303)に設定値としてMが設定される。本実施例では,リターン回数Nの設定値N =2,リターン回数Mの設定値M=2として説明する。 When dehydration is started (300), N 0 (301) is set as the set value for the number of retries N and M 0 is set as the set value for the number of returns M (303). In this embodiment, the set value N 0 = 2 for the number of returns N and the set value M 0 = 2 for the number of returns M will be described.

リトライ回数Nは,第1のアンバランス判定(309)と第2のアンバランス判定(310)で,アンバランスが閾値よりも大きくなった場合,リトライ回数Nを減算する。 The number of retries N is calculated by subtracting the number of retries N when the imbalance becomes larger than the threshold value in the first unbalance determination (309) and the second unbalance determination (310).

リターン回数Mは,リトライ回数Nが所定回数に達した場合,または高速回転数域におけるアンバランス判定(312)で,アンバランスが閾値よりも大きくなった場合に減算する。 The number of returns M is subtracted when the number of retries N reaches a predetermined number of times, or when the imbalance becomes larger than the threshold value in the unbalance determination (312) in the high-speed rotation speed range.

ドラム21の回転を停止後(304),ドラム21を逆回転させて,ドラム21の回転数をω0まで上昇(305)させる。ω0を所定時間維持(306)して,ドラム21の回転数を第1の回転数(ω1)まで上昇(307)させる。ωを所定時間維持(308)して,第1のアンバランス判定(309)や第2のアンバランス判定(310)を行う。アンバランスが第1のアンバランス判定(309)で第1の閾値や,第2アンバランス判定(310)で第2の閾値より大きい場合は,図6と図7に示すリトライ回数Nを判定(321)する。Nが0以上(321)ならば,リトライ回数NはN=2−1=1のように減算(322)する。第1のアンバランス判定(309)でアンバランスが第1の閾値より大きくなった場合は,ドラム21の回転を停止(317)して,ドラム21に張り付いていた毛布を落下させて,第2のアンバランス判定(310)でアンバランスが第2の閾値より大きくなった場合は,ドラム21の回転数をω0よりも高く,ω未満の回転数(ω)に低下(315)させて,アンバランスを修正する。 After the rotation of the drum 21 is stopped (304), the drum 21 is rotated in the reverse direction to increase the rotation speed of the drum 21 to ω 0 (305). The rotation speed of the drum 21 is increased (307) to the first rotation speed (ω 1 ) by maintaining ω 0 for a predetermined time (306). The ω 1 is maintained for a predetermined time (308), and the first unbalance determination (309) and the second imbalance determination (310) are performed. When the imbalance is larger than the first threshold value in the first unbalance determination (309) and the second threshold value in the second imbalance determination (310), the number of retries N shown in FIGS. 6 and 7 is determined (). 321). If N is 0 or more (321), the number of retries N is subtracted (322) as N = 2-1 = 1. If the imbalance becomes larger than the first threshold value in the first unbalance determination (309), the rotation of the drum 21 is stopped (317), the blanket attached to the drum 21 is dropped, and the first is When the imbalance becomes larger than the second threshold value in the unbalance determination (310) of 2, the rotation speed of the drum 21 is higher than ω 0 and decreases to the rotation speed (ω n ) less than ω 1 (315). Let's correct the imbalance.

第1のアンバランス判定(309)と第2のアンバランス判定(310)で,アンバランスが第1の閾値や第2の閾値を所定回数(例えば2回)超えた場合,リトライ回数の設定値(N0)をN=2としたので,N=2-2=0となり,Nが0以下となる。リトライ回数Nが0以下となった場合,リターン回数Mを判定(323)し,リターン回数Mが0以上ならば,リターン回数M=2−1=1のように減算(324)して,リトライ回数Nを設定値にリセット(N=N)(327)する。その後,前述したアンバランスの修正を行うする。 In the first unbalance determination (309) and the second unbalance determination (310), when the imbalance exceeds the first threshold value or the second threshold value a predetermined number of times (for example, twice), the set value of the number of retries. Since (N 0 ) is set to N 0 = 2, N = 2-2 = 0, and N is 0 or less. If the number of retries N is 0 or less, the number of returns M is determined (323), and if the number of returns M is 0 or more, the number of returns M = 2-1 = 1 is subtracted (324) and retries are performed. The number of times N is reset to the set value (N = N 0 ) (327). After that, the above-mentioned imbalance is corrected.

低速回転数域でリトライ回数Nを繰り返し,リターン回数M=0(325)になった場合は,毛布の含水バラツキがアンバランスの原因と判断でき,その場合,ドラム21の回転数の停止(317)やωに低下(315)させても,アンバランスは修正できない。そのため,注水を行い(326),毛布の含水バラツキを修正する必要がある。 If the number of retries N is repeated in the low speed range and the number of returns M = 0 (325), it can be determined that the water content variation of the blanket is the cause of the imbalance. In that case, the rotation speed of the drum 21 is stopped (317). ) Or ω n (315), the imbalance cannot be corrected. Therefore, it is necessary to inject water (326) to correct the water content variation of the blanket.

本実施の形態例では,低速回転数域のリトライ回数Nとリターン回数Mに上限を設けることで,必要以上のリトライを防ぐことができ,脱水時間の増加を抑制しながらアンバランスを修正することができる。 In the example of the present embodiment, by setting an upper limit on the number of retries N and the number of returns M in the low speed range, it is possible to prevent more retries than necessary and correct the imbalance while suppressing an increase in the dehydration time. Can be done.

ωのアンバランスが第1のアンバランス判定(309)と第2のアンバランス判定(310)の閾値よりも小さい場合は,ドラム21の回転数を上昇(311)させて,高速回転数域のアンバランスのアンバランス判定(312)を行う。 When the imbalance of ω 1 is smaller than the threshold values of the first unbalance determination (309) and the second unbalance determination (310), the rotation speed of the drum 21 is increased (311) to increase the rotation speed range of the high speed. The unbalance determination (312) of the imbalance is performed.

高速回転数域のアンバランスが第3のアンバランス判定(312)の第3の閾値よりも大きい場合は,図8に示すリターン回数Mを判定(323)して,リターン回数Mが0より大きい場合,リターン回数MはM=2−1=1のように減算(324)し,ドラム21の回転を停止(317)して,アンバランスを修正する。アンバランスが第3のアンバランス判定(312)の閾値より小さい場合は,ドラム21の回転数が目標回転数に到達しているか判定(313)して,到達している場合は脱水を終了(314)する。ドラム21の回転数が目標回転数に到達していない場合は,ドラム21の回転数が目標回転数に到達するまで,ドラム21の回転数を上昇(311)させ,第3のアンバランスの判定(312)を繰り返す。 When the imbalance in the high-speed rotation speed range is larger than the third threshold value of the third imbalance determination (312), the return count M shown in FIG. 8 is determined (323), and the return count M is larger than 0. In this case, the number of returns M is subtracted (324) so that M = 2-1 = 1, the rotation of the drum 21 is stopped (317), and the imbalance is corrected. If the imbalance is smaller than the threshold value of the third unbalance determination (312), it is determined whether the rotation speed of the drum 21 has reached the target rotation speed (313), and if it has reached, dehydration is completed (). 314). If the rotation speed of the drum 21 has not reached the target rotation speed, the rotation speed of the drum 21 is increased (311) until the rotation speed of the drum 21 reaches the target rotation speed to determine the third imbalance. (312) is repeated.

高速回転数域では,毛布の水が抜けることで,含水のバラツキが大きくなりやすい。そのため,高速回転数域のアンバランスがアンバランス判定(312)の閾値よりも繰返し大きくなると,ドラム21の回転数の停止(317)やωに低下(315)させても,アンバランスの修正が困難と判断できるため,注水を行い含水バラツキを修正する必要がある。そこで,リターン回数Mに上限を設けることで,脱水時間の増加を抑制しながらアンバランスを修正することができる。 In the high-speed rotation range, the water content of the blanket tends to vary greatly due to the drainage of water. Therefore, when the unbalance in the high-speed rotation speed range repeatedly becomes larger than the threshold value of the unbalance determination (312), the imbalance is corrected even if the rotation speed of the drum 21 is stopped (317) or lowered to ω n (315). Since it can be judged that it is difficult, it is necessary to inject water to correct the water content variation. Therefore, by setting an upper limit on the number of returns M, the imbalance can be corrected while suppressing the increase in the dehydration time.

リターン回数M=0となり,脱水がすすぎ脱水ならば脱水起動を行わず(脱水スキップ),すすぎ給水を始め,脱水が最終脱水ならば脱水起動を行わず,運転を停止(326)する。 When the number of returns is M = 0, if the dehydration is rinse dehydration, the dehydration start is not performed (dehydration skip), the rinse water supply is started, and if the dehydration is the final dehydration, the dehydration start is not performed and the operation is stopped (326).

以上,リトライ回数Nとリターン回数Mに上限を設けることで,必要以上のリトライを防ぐことができ,脱水時間の増加を抑制しながらアンバランスを修正することができる。 As described above, by setting the upper limit for the number of retries N and the number of returns M, it is possible to prevent more retries than necessary and correct the imbalance while suppressing the increase in the dehydration time.

なお,本実施の形態例に示すアンバランスの判定や修正方法は,ドラム式洗濯乾燥機にも適用でき,アンバランスが発生した際にリトライ回数Nとリターン回数Mを加算により,回数をカウントしてもよい。 The imbalance determination and correction method shown in the present embodiment can also be applied to a drum-type washer-dryer, and when an imbalance occurs, the number of retries N and the number of returns M are added to count the number of times. You may.

1・・・筐体
11・・・外槽
18・・・振動センサ
21・・・ドラム
22・・・モータ
207・・・第1のアンバランス判定
208・・・第2のアンバランス判定
100・・・ドラム式洗濯機
1 ... Housing 11 ... Outer tank 18 ... Vibration sensor 21 ... Drum 22 ... Motor 207 ... First unbalance determination 208 ... Second unbalance determination 100 ...・ ・ Drum type washing machine

Claims (4)

回転軸が水平または,奥側が下になるように傾斜した回転自在なるドラムと,該ドラムを内包すると共に洗濯水を溜める外槽と,該外槽を内包する筺体と前記ドラム内の洗濯物のアンバランスを検出するアンバランスの判定手段を備えた洗濯機において,
前記ドラムを脱水開始回転数,第1の回転数と段階的に上昇させて,該第1の回転数を維持して,
前記アンバランスの判定手段でアンバランスを判定して,前記アンバランスの判定手段には,第1のアンバランス判定と,第2のアンバランス判定を設け,前記第1のアンバランス判定には第1の閾値を設け,前記第2のアンバランス判定には第2の閾値を設け,
前記第1の閾値は前記第2の閾値よりも大きな値であり,
前記第1の回転数のアンバランスが前記第1の閾値より大きい場合は,前記ドラムの回転数を停止して,再び前記ドラムの回転数を前記第1の回転数まで上昇させ,前記第1の回転数のアンバランスが前記第2の閾値より大きい場合は,前記ドラムの回転数を前記脱水開始回転数より大きく,前記第1の回転数より小さな回転数に低下させ,所定時間維持し,再び前記第1の回転数に上昇させることを特徴とする洗濯機。
A rotatable drum whose rotation axis is horizontal or inclined so that the back side is downward, an outer tub that contains the drum and stores washing water, a housing that contains the outer tub, and laundry in the drum. In a washing machine equipped with an imbalance determination means for detecting imbalance,
The drum is gradually increased to the dehydration start rotation speed and the first rotation speed to maintain the first rotation speed.
The unbalance is determined by the unbalance determination means, the unbalance determination means is provided with a first unbalance determination and a second unbalance determination, and the first unbalance determination is a first. A threshold value of 1 is provided, and a second threshold value is provided for the second imbalance determination.
The first threshold value is a value larger than the second threshold value.
When the imbalance of the first rotation speed is larger than the first threshold value, the rotation speed of the drum is stopped, the rotation speed of the drum is increased again to the first rotation speed, and the first rotation speed is increased. When the unbalance of the rotation speed is larger than the second threshold value, the rotation speed of the drum is reduced to a rotation speed larger than the dehydration start rotation speed and smaller than the first rotation speed, and maintained for a predetermined time. A washing machine characterized in that the number of rotations is increased to the first rotation speed again.
請求項1の洗濯機において,
前記第1の回転数のアンバランスが前記第1の閾値よりも大きい場合,前記ドラムを停止させる速度は,前記ドラムを前記脱水開始回転数から前記第1の回転数まで上昇させる速度よりも大きいことを特徴とする洗濯機。
In the washing machine of claim 1,
When the imbalance of the first rotation speed is larger than the first threshold value, the speed at which the drum is stopped is larger than the speed at which the drum is raised from the dehydration start rotation speed to the first rotation speed. A washing machine that features that.
請求項1乃至請求項2の洗濯機において、
前記第1の回転数のアンバランスが前記第2の閾値よりも大きい場合,前記ドラムの回転数を低下させる速度は,前記脱水開始回転数から前記ドラムを前記第1の回転数まで上昇させる速度よりも大きいを特徴とする洗濯機。
In the washing machine of claims 1 to 2.
When the imbalance of the first rotation speed is larger than the second threshold value, the speed at which the rotation speed of the drum is lowered is the speed at which the drum is raised from the dehydration start rotation speed to the first rotation speed. A washing machine characterized by being larger than.
請求項1乃至請求項2乃至請求項3の洗濯機において,
アンバランスが前記第1の閾値と前記第2の閾値よりも大きくなった回数が,所定の回数を超えた時場合,前記ドラムに注水または運転を停止することを特徴とする洗濯機。
In the washing machine of claims 1 to 2 to 3.
A washing machine characterized in that when the number of times the imbalance becomes larger than the first threshold value and the second threshold value exceeds a predetermined number of times, water is injected into the drum or the operation is stopped.
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