JP2015202302A - Industrial washing and dehydrating machine - Google Patents
Industrial washing and dehydrating machine Download PDFInfo
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- JP2015202302A JP2015202302A JP2014084299A JP2014084299A JP2015202302A JP 2015202302 A JP2015202302 A JP 2015202302A JP 2014084299 A JP2014084299 A JP 2014084299A JP 2014084299 A JP2014084299 A JP 2014084299A JP 2015202302 A JP2015202302 A JP 2015202302A
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- 238000005406 washing Methods 0.000 title claims abstract description 85
- 230000018044 dehydration Effects 0.000 claims description 20
- 238000006297 dehydration reaction Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
Description
本発明は、被洗物を一つの大きな洗濯ドラムで洗濯して脱水する業務用洗濯脱水機において、装置を大型化することなくかつ省エネルギーで洗濯と脱水の両工程に効率よく好適に対応することができる業務用洗濯脱水機に関するものである。 The present invention is an industrial laundry dehydrator for washing and dewatering an object to be washed with one large washing drum, and efficiently and suitably responding to both washing and dehydration processes without increasing the size of the apparatus and saving energy. This is related to a commercial laundry dehydrator.
従来、洗濯と脱水を同一のドラムで行う業務用洗濯脱水機において、洗濯時には洗濯液を貯えて低速回転するため大きなトルクを必要とするのに対して、脱水時にはトルクは低くても高速回転が必要となっている。このため、洗濯ドラムを回転駆動させるモータとしては、１機で洗濯と脱水の両方をまかなうとすると、高トルク出力と、高速回転の両方の性能を満足するために大型化させることが必要であった（特許文献１参照）。
しかしながら、モータを大型化すると、装置全体の大型化、製造コストの増大、そして電源容量の増大等を招くことから、これらの課題を解決するためには、図４に示すように、大型のモータを用いることなく、低速用モータ２１と高速用モータ２２の２つの小型モータとプーリとクラッチ２３を用いて高トルク出力と、高速回転の両方の駆動方法を適宜に切り替える洗濯脱水機が案出された。
この洗濯脱水機は、洗濯時に低速用モータ２１でプーリ減速機構により低速・高トルクで洗濯ドラム２４を駆動し、脱水時にクラッチ２３を切り低速用モータ２１を切り離し、高速用モータ２２のみで洗濯ドラム２４を高速回転させる構造である。
Conventional washing and dehydrating machines that perform washing and dehydration on the same drum require large torque for storing washing liquid and rotating at low speed during washing, whereas dehydration requires high speed rotation even if the torque is low It is necessary. For this reason, as a motor that drives the washing drum to rotate, if one machine can handle both washing and dewatering, it is necessary to increase the size in order to satisfy both high torque output and high speed rotation performance. (See Patent Document 1).
However, increasing the size of the motor leads to an increase in the size of the entire apparatus, an increase in manufacturing cost, an increase in power supply capacity, and the like. To solve these problems, as shown in FIG. A washing and dehydrating machine is devised that uses two small motors, a low-speed motor 21 and a high-speed motor 22, a pulley, and a clutch 23 to appropriately switch between high torque output and high-speed rotation drive methods without using a motor. It was.
This washing dehydrator drives the washing drum 24 at low speed and high torque by the pulley speed reduction mechanism with the low speed motor 21 at the time of washing, disconnects the clutch 23 at the time of dehydration, disconnects the low speed motor 21, and the washing drum with only the high speed motor 22. 24 is a structure that rotates at high speed.
しかしながら、この図４に示す従来の洗濯脱水機は、低速用モータ２１はインバータを用いて電源周波数を変化させて駆動していたが、高速用モータ２２はインバータを用いずに商用電力（５０／６０Ｈｚ）のままで駆動しているので、低速用モータ２１から高速用モータ２２に切り替える際に、始動トルクも大きく始動電流がかなり大きくなっていた。そのため、大型のモータと太い電線径と容量の大きいフューズが必要になるという課題があった。また、商用電力をそのまま用いることから、電源周波数を任意に設定変更することはできなかった。
さらに、洗濯から脱水へと切り替える際に、洗濯ドラムは完全に停止せずに慣性で回転していることから、単純なインバータ回路を用いたとしても回転中の洗濯ドラムを好適に制御することができないという問題があった。
However, in the conventional washing and dewatering machine shown in FIG. 4, the low-speed motor 21 is driven by changing the power supply frequency using an inverter. However, the high-speed motor 22 does not use an inverter, but commercial power (50/50). 60 Hz), when switching from the low speed motor 21 to the high speed motor 22, the starting torque is large and the starting current is considerably large. Therefore, there has been a problem that a large motor, a thick wire diameter and a large capacity fuse are required. Further, since the commercial power is used as it is, the power supply frequency cannot be arbitrarily set and changed.
Furthermore, when switching from washing to dewatering, the washing drum rotates by inertia without completely stopping, so that even if a simple inverter circuit is used, the rotating washing drum can be suitably controlled. There was a problem that I could not.
本発明は、このような実情に鑑みてなされたものであり、装置を大型化することなくかつ省エネルギーで洗濯と脱水の両工程に効率よく好適に対応することができる業務用洗濯脱水機を提供しようとするものである。 The present invention has been made in view of such circumstances, and provides a commercial laundry dehydrator that can efficiently and suitably cope with both washing and dewatering steps without increasing the size of the apparatus and saving energy. It is something to try.
上記課題に鑑みて鋭意研究の結果、本発明者は、洗濯用の低速用モータと脱水用の高速用モータにそれぞれインバータを備えるとともに、高速用モータ用のインバータにモータの回転数検知手段を備えて制御することを可能とすることにより大型なモータを用いることなく、洗濯と脱水の両工程に適応することができる業務用洗濯脱水機を案出するに至った。 As a result of diligent research in view of the above problems, the present inventor has provided an inverter for each of the low-speed motor for washing and the high-speed motor for dehydration, and also provided an inverter for the high-speed motor with a motor rotation speed detecting means. This makes it possible to devise an industrial laundry dehydrator that can be applied to both washing and dewatering processes without using a large motor.
すなわち、本発明の業務用洗濯脱水機は、洗濯脱水機における洗濯ドラムを洗濯時に回転駆動する低速用モータと、上記洗濯ドラムを脱水時に回転駆動する高速用モータと、上記低速用モータと上記高速用モータとの間に接離自在に介在するクラッチと、上記高速用モータと低速用モータとクラッチを駆動制御する制御部を備える業務用洗濯脱水機において、上記低速用モータには該低速用モータを駆動する電源周波数を変化させる低速用インバータを備え、上記高速用モータには該高速用モータを駆動する電源周波数を変化させる高速用インバータを備え、上記制御部は洗濯時に上記低速用モータが洗濯ドラムを低速で回転駆動し、洗濯が終了して脱水への切り替えに際し上記低速用モータの駆動を止め上記クラッチを切って上記高速用インバータを用いて高速用モータが上記洗濯ドラムを回転駆動することを特徴とする。
本発明によれば、洗濯から脱水へと切り替える際に、低速用モータから高速用モータへの切り替えがスムーズに行うことが可能となり、高速用モータの始動トルクと始動電流が小さくなって、モータのサイズと設定最大電流を小さくすることができる。
That is, the commercial laundry dehydrator of the present invention includes a low speed motor for rotating the washing drum in the laundry dehydrator during washing, a high speed motor for rotating the laundry drum during dehydration, the low speed motor, and the high speed. In a commercial laundry dehydrator comprising a clutch that is detachably connected to a motor for use, a high speed motor, a low speed motor, and a controller that controls the drive of the clutch, the low speed motor includes the low speed motor A low-speed inverter that changes a power supply frequency for driving the high-speed motor, and a high-speed inverter that changes a power supply frequency for driving the high-speed motor. The drum is rotated at a low speed, and when washing is completed and switching to dehydration, the low speed motor is stopped and the clutch is disengaged to stop the high speed ink. High speed motor and drives rotating the laundry drum with a converter.
According to the present invention, when switching from washing to dehydration, it is possible to smoothly switch from the low-speed motor to the high-speed motor, and the starting torque and starting current of the high-speed motor are reduced. Size and set maximum current can be reduced.
また本発明の業務用洗濯脱水機は、制御部が、洗濯が終了して脱水への切り替えに際し低速用インバータにより低速用モータが洗濯時よりも高い回転数で洗濯ドラムを駆動してからクラッチを切って高速用モータが洗濯ドラムを回転駆動することを特徴とする。
これにより、洗濯ドラムの回転駆動が低速用モータから高速用モータにスムーズに切り替えすることができる。
In the commercial laundry dehydrator according to the present invention, the control unit drives the washing drum at a higher rotational speed than that during washing by the low speed inverter when the washing is finished and the switching to the dehydration is performed. The high-speed motor is driven to rotate the washing drum.
Thereby, the rotational drive of the washing drum can be smoothly switched from the low-speed motor to the high-speed motor.
また本発明の業務用洗濯脱水機は、洗濯脱水機における洗濯ドラムを洗濯時に回転駆動する低速用モータと、上記洗濯ドラムを脱水時に回転駆動する高速用モータと、上記低速用モータと上記高速用モータとの間に接離自在に介在するクラッチと、上記高速用モータと低速用モータとクラッチを駆動制御する制御部を備える業務用洗濯脱水機において、上記制御部には、上記低速用モータと高速用モータを選択的に駆動する電源周波数を変化させる低速・高速兼用インバータを備え、上記制御部は洗濯時に上記低速・高速兼用インバータを用いて低速用モータが洗濯ドラムを低速で回転駆動し、洗濯が終了して脱水への切り替えに際し上記低速用モータの駆動を止め上記クラッチを切って上記低速・高速兼用インバータを用いて高速用モータが上記洗濯ドラムを回転駆動することを特徴とする。
これにより、低速用と高速用とで２つ必要であったインバータを１つにまとめることができ、装置の小型化、簡略化に寄与する。
The commercial laundry dehydrator according to the present invention includes a low speed motor for rotating the laundry drum in the laundry dehydrator during washing, a high speed motor for rotating the laundry drum during dehydration, the low speed motor, and the high speed motor. In a commercial laundry dehydrator comprising a clutch that is detachably connected to a motor, and a high-speed motor, a low-speed motor, and a control unit that drives and controls the clutch, the control unit includes the low-speed motor and A low-speed / high-speed inverter that changes the power supply frequency for selectively driving the high-speed motor is provided, and the control unit uses the low-speed / high-speed inverter when washing to rotate the low-speed motor to rotate the washing drum at a low speed, When washing is finished and switching to dehydration, the driving of the low-speed motor is stopped, the clutch is disengaged, and the high-speed motor is used using the low-speed / high-speed inverter. Characterized in that for rotating the wash drum.
As a result, two inverters required for low speed and high speed can be combined into one, which contributes to the miniaturization and simplification of the apparatus.
以下、添付図面を参照しながら、本発明に係る業務用洗濯脱水機を実施するための形態を詳細に説明する。図１〜図３は、本発明の実施の形態を例示する図であり、これらの図において、同一の符号を付した部分は同一物を表わし、基本的な構成及び機能は同様であるものとする。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out a commercial laundry dehydrator according to the present invention will be described in detail with reference to the accompanying drawings. 1 to 3 are diagrams illustrating embodiments of the present invention. In these drawings, the same reference numerals denote the same components, and the basic configuration and functions are the same. To do.
＜構成＞
図１は、本発明の業務用洗濯脱水機の第１の実施例の動力連動を示している。
業務用洗濯脱水機において被洗物を投入して洗濯・脱水する洗濯ドラム１は、減速用にベルトで連結されるプーリ大２とプーリ小３を介して高速用モータ４に連結され、この高速用モータ４は、主に脱水時に用いられ、制御部５の高速用インバータ６によって洗濯ドラム１を高速で回転駆動する。この高速用インバータ６は、高速用モータ４の実際の回転数をモニターしながら適正な回転数に駆動制御することができる。
そして高速用モータ４は、接離自在な２つのクラッチ板から構成されるクラッチ７の一方側に固定的に繋がっている。
<Configuration>
FIG. 1 shows the power interlocking of the first embodiment of the commercial laundry dehydrator of the present invention.
A laundry drum 1 for washing and dewatering by putting an object to be washed in a commercial laundry dehydrator is connected to a high-speed motor 4 via a large pulley 2 and a small pulley 3 connected by a belt for deceleration. The motor 4 is mainly used at the time of dehydration, and drives the washing drum 1 to rotate at high speed by the high-speed inverter 6 of the control unit 5. The high speed inverter 6 can be driven and controlled to an appropriate rotational speed while monitoring the actual rotational speed of the high speed motor 4.
The high-speed motor 4 is fixedly connected to one side of a clutch 7 composed of two clutch plates that can be freely connected and separated.
クラッチ７の他端側は、プーリ大８に繋がっており、このプーリ大８は、減速用にベルトによりプーリ小９に連結され、このプーリ小９はプーリ大１０と同軸で一体的に組み合わされ、さらにプーリ大１０はベルトによりプーリ小１１に連結され、そしてプーリ小１１は低速用モータ１２に連結されている。低速用モータ１２は、制御部５の低速用インバータ１３によって回転駆動される。 The other end of the clutch 7 is connected to a pulley large 8, which is connected to a pulley small 9 by a belt for deceleration, and the pulley small 9 is coaxially and integrally combined with the pulley large 10. Further, the large pulley 10 is connected to a small pulley 11 by a belt, and the small pulley 11 is connected to a low speed motor 12. The low speed motor 12 is rotationally driven by the low speed inverter 13 of the control unit 5.
洗濯時に、制御部５の制御によりクラッチ７を「入」（駆動）にするとともに、低速用モータ１２により洗濯ドラム１を駆動し（高速用モータ４は停止）、洗濯が終了して脱水工程に切り替える際に、制御部５の制御によりクラッチ７を「切」（空転）にすることにより、洗濯ドラム１の駆動を高速用モータ４に切り替える構造である。 At the time of washing, the clutch 7 is "on" (driven) under the control of the control unit 5 and the washing drum 1 is driven by the low speed motor 12 (the high speed motor 4 is stopped). At the time of switching, the control of the control unit 5 causes the clutch 7 to be “disengaged” (idling), thereby switching the driving of the washing drum 1 to the high-speed motor 4.
図２は、本発明の業務用洗濯脱水機の第２の実施例の動力連動を示している。前述した第１の実施例との相違点は、制御部に低速用インバータと高速用インバータを一体化させた低速・高速兼用インバータ１４を設けたことである。
そもそも低速用インバータ１３と高速用インバータ６とは、同時に動作することなく、別個に動作するものである。したがって、制御部５としてインバータを低速用・高速用の何れかに切り替えることにより、インバータ回路しては低速・高速兼用インバータ１４を随時切り替えて使用すればよいものである。その他の部材については、上述した第１の実施例と同様である。
FIG. 2 shows the power interlocking of the second embodiment of the commercial laundry dehydrator of the present invention. The difference from the first embodiment described above is that a low-speed / high-speed inverter 14 in which a low-speed inverter and a high-speed inverter are integrated is provided in the control unit.
First of all, the low-speed inverter 13 and the high-speed inverter 6 operate separately without operating simultaneously. Therefore, by switching the inverter as either the low speed or the high speed as the control section 5, the inverter circuit may be used by switching the low speed / high speed inverter 14 as needed. Other members are the same as those in the first embodiment described above.
＜動作＞
本発明の業務用洗濯脱水機の動作について、上記第１の実施例を例に以下に説明する。まず業務用洗濯脱水機の使用者は、洗濯工程から脱水工程への作業の流れを制御部５に入力し設定する。例えば、被洗物の種類、被洗物の重量、洗濯時間、そして脱水時間等である。
そして、制御部５の低速用インバータ１３が低速用モータ１２を回転駆動すると、プーリ小１１、プーリ大１０・プーリ小９、プーリ大８の順にベルト駆動で回転が減速され、その回転が繋がっているクラッチ７を介して非稼動の高速用モータ４、プーリ小３、プーリ大２の順にベルト駆動で回転が伝達され、最終的に洗濯ドラム１を高トルクで回転（回動、揺動）する。
<Operation>
The operation of the commercial laundry dehydrator according to the present invention will be described below by taking the first embodiment as an example. First, the user of the commercial laundry dehydrator inputs and sets the flow of work from the laundry process to the dehydration process. For example, the type of the object to be cleaned, the weight of the object to be cleaned, the washing time, and the dehydration time.
When the low-speed inverter 13 of the control unit 5 drives the low-speed motor 12 to rotate, the rotation is decelerated by the belt drive in the order of the small pulley 11, the large pulley 10, the small pulley 9, and the large pulley 8, and the rotation is connected. Rotation is transmitted by belt drive in the order of the non-operating high-speed motor 4, the small pulley 3, and the large pulley 2 through the clutch 7, and the laundry drum 1 is finally rotated (rotated and swung) with high torque. .
次に、制御部５で設定した洗濯時間が終了すると、制御部５は低速用インバータ１３が低速用モータ１２の駆動電源の供給を止め、クラッチ７を「切」（空転）にして高速用インバータ６により高速用モータ４を回転駆動する。
この際、洗濯ドラム１は、それまで低速用モータ１２により駆動されていた回転を、クラッチ７が切れても慣性により惰性回転し続けている。そして、この状態で洗濯ドラム１を脱水用の高速回転で高速用モータ４を駆動させるに際して、高速用インバータ６は洗濯ドラム１の回転数（すなわち高速用モータ４の回転数）を検知した上で、洗濯ドラム１の回転にブレーキがかからないよう、かつ始動トルクが過大にならないような適正に制御して高速用モータ４を駆動するものである。
Next, when the washing time set by the control unit 5 is completed, the control unit 5 causes the low-speed inverter 13 to stop supplying the driving power to the low-speed motor 12, and the clutch 7 is set to “disengaged” (idling) so that the high-speed inverter 6 drives the high-speed motor 4 to rotate.
At this time, the washing drum 1 continues to rotate due to inertia even if the clutch 7 is disengaged from the rotation that has been driven by the low-speed motor 12 until then. In this state, when driving the high-speed motor 4 with the high-speed rotation for dewatering the washing drum 1, the high-speed inverter 6 detects the rotation speed of the washing drum 1 (that is, the rotation speed of the high-speed motor 4). The high-speed motor 4 is driven under proper control so that the rotation of the washing drum 1 is not braked and the starting torque is not excessive.
さらに具体的に説明すると、図３（ａ）に示すように、洗濯時に洗濯ドラム１は低速用モータ１２の正転・反転の交互に繰り返しにより揺動している。この低速回転の加速度としては、０．５〜０．８Ｇ程度である。
そして、洗濯工程が終了して脱水工程に移行する際に、図３（ｂ）に示すように、脱水時のドラムの回転方向において、低速用インバータ１３がその回転駆動性能を最大にして洗濯ドラム１を回転させた状態で、クラッチ７を「切」（空転）にするとともに低速用モータ１２を電源断にし、それから高速用インバータ６が高速用モータ４を回転駆動するものである。
この洗濯ドラム１を低速用モータ１２により比較的高速で回転させることにより、高速用モータ４での回転始動に繋げやすくするものであり、高速用インバータ６は高速用モータ４を駆動するための始動トルク及び駆動電流が少なくて済み、スムーズにモータ駆動の切り替えが行えるものである。
More specifically, as shown in FIG. 3 (a), the washing drum 1 swings by alternately repeating forward and reverse rotation of the low speed motor 12 during washing. The acceleration of this low speed rotation is about 0.5 to 0.8G.
When the washing process is completed and the process proceeds to the dewatering process, as shown in FIG. 3B, the low speed inverter 13 maximizes the rotational drive performance in the rotating direction of the drum during the dewatering. In the state where 1 is rotated, the clutch 7 is turned off (idle) and the low speed motor 12 is turned off, and then the high speed inverter 6 drives the high speed motor 4 to rotate.
The washing drum 1 is rotated at a relatively high speed by the low-speed motor 12 to facilitate the rotation start by the high-speed motor 4, and the high-speed inverter 6 is started for driving the high-speed motor 4. Torque and drive current can be reduced, and motor drive can be switched smoothly.
以上、本発明の業務用洗濯脱水機について、具体的な実施の形態を示して説明したが、本発明はこれらに限定されるものではない。当業者であれば、本発明の要旨を逸脱しない範囲内において、上記実施形態における業務用洗濯脱水機の構成及び機能に様々な変更・改良を加えることが可能である。 The business laundry dehydrator of the present invention has been described with reference to specific embodiments, but the present invention is not limited to these. A person skilled in the art can make various changes and improvements to the configuration and function of the commercial laundry dehydrator in the above-described embodiment without departing from the scope of the present invention.
本発明の業務用洗濯脱水機は、業務用洗濯脱水機を製造する産業において利用することができるものである。 The commercial laundry dehydrator of the present invention can be used in the industry for manufacturing commercial laundry dehydrators.
１：洗濯ドラム
２：プーリ大
３：プーリ小
４：高速用モータ
５：制御装置
６：高速用インバータ
７：クラッチ
８：プーリ大
９：プーリ小
１０：プーリ大
１１：プーリ小
１２：低速用モータ
１３：低速用インバータ
１４：低速・高速兼用インバータ
1: Washing drum 2: Pulley large 3: Pulley small 4: High speed motor 5: Control device 6: High speed inverter 7: Clutch 8: Pulley large 9: Small pulley 10: Large pulley 11: Small pulley 12: Low speed motor 13: Low speed inverter 14: Low speed / high speed inverter
Claims (4)
上記低速用モータには該低速用モータを駆動する電源周波数を変化させる低速用インバータを備え、上記高速用モータには該高速用モータを駆動する電源周波数を変化させる高速用インバータを備え、
上記制御部は洗濯時に上記低速用モータが洗濯ドラムを低速で回転駆動し、洗濯が終了して脱水への切り替えに際し上記低速用モータの駆動を止め上記クラッチを切って上記高速用インバータを用いて高速用モータが上記洗濯ドラムを回転駆動することを特徴とする業務用洗濯脱水機。 A low-speed motor that rotationally drives the washing drum in the washing / dehydrating machine during washing, a high-speed motor that rotationally drives the washing drum during dehydration, and the low-speed motor and the high-speed motor are detachably interposed. In a commercial laundry dehydrator comprising a clutch, and a high speed motor, a low speed motor, and a control unit for driving and controlling the clutch,
The low-speed motor includes a low-speed inverter that changes a power supply frequency for driving the low-speed motor, and the high-speed motor includes a high-speed inverter that changes a power supply frequency for driving the high-speed motor,
The control unit drives the low-speed motor to rotate the washing drum at low speed during washing, stops driving the low-speed motor when the washing is finished and switches to dehydration, disengages the clutch, and uses the high-speed inverter. A commercial laundry dehydrator characterized in that a high-speed motor rotationally drives the washing drum.
上記制御部には、上記低速用モータと高速用モータを選択的に駆動する電源周波数を変化させる低速・高速兼用インバータを備え、
上記制御部は洗濯時に上記低速・高速兼用インバータを用いて低速用モータが洗濯ドラムを低速で回転駆動し、洗濯が終了して脱水への切り替えに際し上記低速用モータの駆動を止め上記クラッチを切って上記低速・高速兼用インバータを用いて高速用モータが上記洗濯ドラムを回転駆動することを特徴とする業務用洗濯脱水機。 A low-speed motor that rotationally drives the washing drum in the washing / dehydrating machine during washing, a high-speed motor that rotationally drives the washing drum during dehydration, and the low-speed motor and the high-speed motor are detachably interposed. In a commercial laundry dehydrator comprising a clutch, and a high speed motor, a low speed motor, and a control unit for driving and controlling the clutch,
The control unit includes a low-speed / high-speed inverter that changes a power supply frequency for selectively driving the low-speed motor and the high-speed motor,
The control unit uses the low-speed / high-speed inverter at the time of washing to drive the low-speed motor to rotate the washing drum at a low speed, and when the washing is finished and switching to dehydration, the low-speed motor is stopped and the clutch is turned off. A commercial laundry dehydrator characterized in that the high-speed motor rotates the laundry drum using the low-speed / high-speed inverter.
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| JPS56161090A (en) * | 1980-05-16 | 1981-12-11 | Sanyo Electric Co | Horizontal drum type washing machine |
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| JPS544477A (en) * | 1977-06-10 | 1979-01-13 | Sanyo Electric Co Ltd | Operational controller of dehydrating machine |
| JPS56161090A (en) * | 1980-05-16 | 1981-12-11 | Sanyo Electric Co | Horizontal drum type washing machine |
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