JP2547448B2 - Load detection device for washing machine - Google Patents
Load detection device for washing machineInfo
- Publication number
- JP2547448B2 JP2547448B2 JP1107658A JP10765889A JP2547448B2 JP 2547448 B2 JP2547448 B2 JP 2547448B2 JP 1107658 A JP1107658 A JP 1107658A JP 10765889 A JP10765889 A JP 10765889A JP 2547448 B2 JP2547448 B2 JP 2547448B2
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- Prior art keywords
- motor
- washing
- time
- load amount
- pulse
- Prior art date
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、洗濯兼脱水槽（あるいは洗濯槽。以下、洗
濯兼脱水槽と総称する）内に投入された衣類の量を検知
する洗濯機の負荷量検知装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a washing machine for detecting the amount of clothes put in a washing / dehydrating tub (or a washing tub; hereinafter collectively referred to as a washing / dehydrating tub). Load amount detection device.
従来から洗濯機の負荷量検知装置は数多く提案されて
いる。Conventionally, many load detection devices for washing machines have been proposed.
たとえば、洗濯兼脱水槽および攪拌翼を切換駆動する
モータと、このモータへの通電制御を行う制御手段と、
前記モータの逆起電力を直流矩形波パルスに変換するパ
ルス変換手段とを備え、前記制御手段は前記モータに所
定時間通電してその直後のオフ時間内におけるパルス数
から負荷量を判定するものがある。For example, a motor for switching and driving the washing / dehydrating tub and the stirring blade, and a control means for controlling energization of the motor,
A pulse conversion means for converting the back electromotive force of the motor into a DC rectangular wave pulse, and the control means determines the load amount from the number of pulses within the off time immediately after the motor is energized for a predetermined time. is there.
すなわち、モータの逆起電力をモータ駆動用コンデン
サーの端子電圧によって検知し、これを直流矩形波パル
スに変換し、モータオフ時間内におけるパルス数によっ
て負荷量を検知するというものである。That is, the back electromotive force of the motor is detected by the terminal voltage of the motor driving capacitor, this is converted into a DC rectangular wave pulse, and the load amount is detected by the number of pulses within the motor off time.
なお、特開昭64−15095号公報には、モータオフ時間
内におけるパルス数の積算値およびパルスピーク値の変
化により洗濯機の負荷量を判定する技術が開示されてい
る。Japanese Patent Laid-Open No. 64-15095 discloses a technique for determining the load amount of a washing machine based on changes in the integrated value of the number of pulses and the pulse peak value during the motor off time.
また、特開昭62−176492号公報には、モータオフ時間
におけるパルス数の積算値の変化により洗濯機の負荷量
を判定する技術が開示されている。Further, Japanese Patent Application Laid-Open No. 62-176492 discloses a technique for determining the load amount of a washing machine by the change in the integrated value of the number of pulses during the motor off time.
さらに、特開昭62−176492号公報には、モータオフ時
間内におけるパルス数の積算値の変化により洗濯機の負
荷量を判定する（負荷量検知は２回実施する）技術が開
示されている。Further, Japanese Patent Application Laid-Open No. 62-176492 discloses a technique of determining the load amount of a washing machine by changing the integrated value of the number of pulses during the motor off time (load amount detection is performed twice).
ところで、前記した従来技術は、モータオフ時間内に
おけるパルスが発生しなくなるまでのパルス数によって
負荷量を検知するいわゆる減衰電圧方式とも謂うべき技
術を採用したものである。この減衰電圧方式の場合、電
圧減衰曲線の要因としては、回転数の減衰とロータ２次
電流（ロータ側）の減衰とがあり、ロータ２次電流の減
衰は、２次抵抗のバラツキおよび鉄心の磁気特性のバラ
ツキによって変化し、さらに１次側（ステータ）の抵抗
値のバラツキもロータ２次電流の減衰を変化させる要因
となるものであって、このように減衰電圧法はモータの
バラツキの影響を受け易い。つまり、洗濯機一台一台に
投入される衣類の負荷量計測値が異なり、精度が悪く、
負荷量に応じた洗濯時間やすすぎ時間、さらには負荷量
に応じた水位を設定することが難しいという問題を残し
ており、洗濯時間やすすぎ時間が短く、また水位が低い
という洗濯不足となり、一方、洗濯時間やすすぎ時間が
長過ぎ、また水位が高いと節電，節水の点で無駄を生じ
る結果となる。By the way, the above-mentioned conventional technique adopts a technique which is also called a so-called decay voltage system in which the load amount is detected by the number of pulses until the pulse is not generated within the motor off time. In the case of this damping voltage method, the factors of the voltage decay curve are the decay of the rotation speed and the decay of the rotor secondary current (rotor side), and the decay of the rotor secondary current is due to the variations in the secondary resistance and the iron core. Variations in the magnetic characteristics cause variations in the resistance value of the primary side (stator), which also causes a change in the attenuation of the rotor secondary current. Thus, the damping voltage method affects the variations in the motor. Easy to receive. In other words, the load measurement value of the clothes thrown into each washing machine is different, the accuracy is poor,
There is a problem that it is difficult to set the washing time and rinsing time according to the load amount, and further it is difficult to set the water level according to the loading amount. If the washing time and the rinsing time are too long and the water level is high, it results in waste of electricity and water.
本発明の目的は、各洗濯機毎の機械的，電気的バラツ
キにもとづく負荷量計測値のバラツキを最小限に抑え、
負荷量に応じた洗濯時間やすすぎ時間、さらには負荷量
に応じた水位を設定でき、従来問題を残していた洗濯時
間やすすぎ時間が短く、また水位が低いと洗濯不足とな
り、一方、洗濯時間やすすぎ時間が長過ぎ、また水位が
高いと節電，節水の点で無駄を生じるといった不具合を
なくすことのできる洗濯機の負荷量検知装置を提供する
ことにある。An object of the present invention is to minimize variations in load amount measurement values based on mechanical and electrical variations for each washing machine,
Washing time and rinsing time according to load amount, and further water level according to load amount can be set, and the washing time and rinsing time that had been problematic in the past are short, and when the water level is low, insufficient washing occurs, while washing time It is an object of the present invention to provide a load amount detection device for a washing machine, which can eliminate the problems of wastefulness in terms of power saving and water saving when the rinsing time is too long and the water level is high.
本発明は、洗濯槽内の攪拌翼を駆動するモータと、モ
ータ駆動用コンデンサーと、モータへの通電を制御する
制御手段と、モータの駆動通電をOFFした後の慣性回転
中に発生するモータの逆起電力に基づいて洗濯槽内の洗
濯物負荷量を判定する洗濯機において、前記逆起電力の
半波の矩形波パルスに変換するパルス変換手段を設け、
前に発生する矩形波パルスの発生時点から後に発生する
矩形波パルスの発生時点までの時間間隔を計測して洗濯
物負荷量を判定することを特徴とするものである。The present invention relates to a motor that drives a stirring blade in a washing tub, a motor driving capacitor, a control unit that controls energization of the motor, and a motor that is generated during inertial rotation after the drive energization of the motor is turned off. In the washing machine for determining the load of laundry in the washing tub based on the back electromotive force, pulse conversion means for converting the back electromotive force into a rectangular half-wave pulse is provided.
It is characterized in that the laundry load amount is determined by measuring the time interval from the generation time point of the rectangular wave pulse generated before to the generation time point of the rectangular wave pulse generated later.
モータの駆動通電をOFFした後の慣性回転中に発生す
るモータの逆起電力を半波の矩形波パルスに変換し、前
に発生する矩形波パルスの発生時点から後に発生する矩
形波パルスの発生時点までの時間間隔を計測して洗濯物
の負荷量を測定する負荷量検知は、上記計測の時間間隔
が個々のモータでバラツキが少ないのである。Converts the back electromotive force of the motor that occurs during inertial rotation after turning off the motor drive current to a half-wave rectangular wave pulse, and generates a rectangular wave pulse that occurs from the time when the preceding rectangular wave pulse occurs In the load amount detection for measuring the load amount of the laundry by measuring the time interval up to the time point, the time interval of the above measurement has little variation among the individual motors.
本発明の一実施例を図面にもとづいて説明する。 An embodiment of the present invention will be described with reference to the drawings.
第１図に示すよに、鋼板製の外枠１内には、吊り棒２
およびコイルバネや弾性ゴムからなる防振装置３によっ
て合成樹脂製の外槽４が吊架されている。吊り棒２およ
び防振装置３は４個設ける。As shown in FIG. 1, a suspension bar 2 is provided in an outer frame 1 made of a steel plate.
An outer tank 4 made of synthetic resin is suspended by a vibration isolator 3 made of a coil spring and elastic rubber. Four suspension rods 2 and four vibration damping devices 3 are provided.
洗濯するための水を溜める外槽４内には、合成樹脂製
の洗濯兼脱水槽５を回転自在に設ける。洗濯兼脱水槽５
には、多数の脱水孔5aを設け、中央底部には、パルセー
タもしくはアジテータからなる回転体６を回転可能に設
ける。洗い作業およびすすぎ作業時には、洗濯兼脱水槽
５を静止させ、回転体６を時計方向および反時計方向に
回転させる。また、脱水運転時には、洗濯兼脱水槽５を
一方向に回転させる。回転体６および洗濯兼脱水槽５の
回転は、駆動装置７により行われる。A washing / dehydrating tub 5 made of synthetic resin is rotatably provided in the outer tub 4 for storing water for washing. Washing and dehydration tank 5
A large number of dehydration holes 5a are provided in the above, and a rotating body 6 made of a pulsator or an agitator is rotatably provided in the central bottom portion. During the washing work and the rinsing work, the washing / dehydrating tub 5 is stopped and the rotating body 6 is rotated clockwise and counterclockwise. Further, during the dehydration operation, the washing and dehydrating tub 5 is rotated in one direction. The rotation of the rotating body 6 and the washing / dehydrating tub 5 is performed by the drive device 7.
駆動装置７は、モータ８と、モータ８の回転を回転体
６もしくは洗濯兼脱水槽５に伝達するためのプーリ9aや
ベルト9bからなる伝達手段９と、洗いおよびすすぎ時に
回転体６のみを回転させたりあるいは脱水時に洗濯兼脱
水槽５を回転させたりするクラッチ装置10と、クラッチ
装置10の切換えを行うソレノイド7aからなる。The drive device 7 includes a motor 8, a transmission means 9 including a pulley 9a and a belt 9b for transmitting the rotation of the motor 8 to the rotating body 6 or the washing / dehydrating tub 5, and only the rotating body 6 is rotated during washing and rinsing. It is composed of a clutch device 10 for operating or rotating the washing / dehydrating tub 5 during dehydration, and a solenoid 7a for switching the clutch device 10.
12は排水を司る排水装置である。 Reference numeral 12 is a drainage device that controls drainage.
駆動装置７は、外槽４の底部に鋼板製の支持板15を用
いて固定する。The drive device 7 is fixed to the bottom of the outer tub 4 using a support plate 15 made of a steel plate.
外槽４には、この外槽４内の水の圧力を水位センサー
26に伝達するP.S（圧力検知）チューブ27を接続するた
めの導入口4cが設けてある。The outer tank 4 has a water level sensor for measuring the pressure of the water in the outer tank 4.
An inlet port 4c is provided for connecting a PS (pressure detection) tube 27 that communicates with 26.
外枠１の上部には、洗濯物を投入する投入口19aと、
コントローラ等の電気部品を収納する操作箱19bを形成
した合成樹脂製のトップカバー19が設けてある。投入口
19aには、合成樹脂製の蓋20を設ける。In the upper part of the outer frame 1, a loading port 19a for loading laundry,
A top cover 19 made of synthetic resin is provided in which an operation box 19b for housing electric parts such as a controller is formed. Input port
A lid 20 made of synthetic resin is provided on 19a.
操作箱19bの上面には、操作パネル21が取り付けてあ
り、操作箱19b内には、給水電磁弁24を設ける。An operation panel 21 is attached to the upper surface of the operation box 19b, and a water supply solenoid valve 24 is provided in the operation box 19b.
操作箱19bに配置した水位センサー26は、外側４内の
水の圧力を検出することにより、規定水位まで水が溜っ
たかどうかを判定する。水位センサー26は、コア，コイ
ル，ばね等から構成される。The water level sensor 26 arranged in the operation box 19b detects the pressure of water in the outer side 4 to determine whether or not the water has accumulated up to the specified water level. The water level sensor 26 is composed of a core, a coil, a spring and the like.
洗濯，すすぎ，脱水等を制御するコントローラ部は、
収納箱30内に配置する。The controller part that controls washing, rinsing, dehydration, etc.
Place in storage box 30.
操作箱21には、電源スイッチボタン29および操作スイ
ッチが配置されている。The operation box 21 is provided with a power switch button 29 and operation switches.
28は洗濯機の脚部である。 28 is the leg of the washing machine.
第２図は操作パネル21を示したものである。 FIG. 2 shows the operation panel 21.
以上の構成において、電源スイッチボタン29を押して
電源スイッチをONし、操作スイッチの「センサー（標
準）」ボタンを押すと、コントローラからの信号で給水
電磁弁26に通電され、洗濯兼脱水槽５内に給水される。
このとき、ソレノイド7aにも通電され、モータ８には、
0.5秒ON−４秒OFFで通電され、洗濯兼脱水槽５は、ゆる
やかな回転で一方向に回転し、槽５内の洗濯物に均一に
水がかかるようにしている。In the above configuration, when the power switch button 29 is pressed to turn on the power switch and the “sensor (standard)” button of the operation switch is pressed, the water supply solenoid valve 26 is energized by the signal from the controller, and the washing and dehydration tub 5 Will be supplied with water.
At this time, the solenoid 7a is also energized, and the motor 8
Power is supplied for 0.5 seconds ON-4 seconds OFF, and the washing / dehydrating tub 5 rotates in one direction with gentle rotation so that the laundry in the tub 5 is uniformly splashed with water.
これにより、洗濯兼脱水槽５内の衣類は、湿布と乾布
とが混在せず、完全湿布状態で負荷量を検知するため、
精度向上が図れる。As a result, the clothes in the washing / dehydrating tub 5 do not contain the compress and the dry cloth, and the load amount is detected in the complete compress state.
The accuracy can be improved.
また、水位の最低水位までの給水を水位センサー26が
検知すると、給水電磁弁24,ソレノイド7aへの通電を停
止し、モータ８に再び通電して、布量検知攪拌より強く
通常の攪拌より弱い反転攪拌水流0.5秒ON−５秒OFFの動
作を８秒間行った後、布量検知攪拌を行う。When the water level sensor 26 detects the water supply to the lowest water level, the water supply solenoid valve 24 and the solenoid 7a are de-energized and the motor 8 is re-energized to be stronger than the cloth amount detection stirring and weaker than normal stirring. After the reverse stirring water flow is turned on for 0.5 seconds and turned off for 5 seconds for 8 seconds, the cloth amount detection stirring is performed.
布量検知行程は、0.4秒ON−１秒OFFの反転攪拌を行
い、OFF時に回転体６が惰性で回転するときのモータ８
の逆起電力をモータ駆動用コンデンサー8aの端子電圧で
検知し、これを直流矩形波パルスに変換し、このパルス
間の時間間隔t1を測定して布量を判定する。すなわち、
洗濯物の量が多い場合は、回転体６への抵抗が大きいた
め、惰性回転が妨げられ、パルス間の時間間隔t1は長く
なり、洗濯物の量が少ない場合には、逆にパルス間の時
間間隔t1は短くなる。The cloth amount detection process is 0.4 second ON-1 second OFF agitation, and the motor 8 when the rotating body 6 rotates by inertia when OFF.
The back electromotive force is detected by the terminal voltage of the motor driving capacitor 8a, this is converted into a DC rectangular wave pulse, and the time interval t 1 between these pulses is measured to determine the cloth amount. That is,
When the amount of laundry is large, the resistance to the rotating body 6 is large, so inertial rotation is hindered, and the time interval t 1 between pulses becomes long. The time interval t 1 of is short.
さらに詳しく述べると、パルス間の時間の計測は、第
３図に示す回路により第４図に示すごとく検出した両波
検知のパルスの１発目のパルス（イ）の発生時点と、３
発目のパルス（ロ）の発生時点との時間間隔t1を測定
し、これを20回繰り返し、その合計の時間を、予めマイ
コンに記憶してある洗濯量−時間の関係と比較して洗濯
量を決定し、洗濯量に応じた水位，洗い，脱水時間等を
自動的に設定し、以降の運転を行う。More specifically, the time between pulses is measured at the time when the first pulse (a) of the double-wave detection pulse detected by the circuit shown in FIG. 3 is detected as shown in FIG.
The time interval t 1 from the time of the occurrence of the second pulse (b) is measured, this is repeated 20 times, and the total time is compared with the washing amount-time relationship stored in advance in the microcomputer. Determine the amount, automatically set the water level, washing, dehydration time, etc. according to the amount of laundry, and perform the subsequent operation.
また、全波検知したパルスの２番目のパルス（ハ）と
４番目のパルス（ニ）の発生時点との時間間隔t2を計測
してもよい。Further, the time interval t 2 between the second pulse (C) of the full-wave detected pulse and the generation time point of the fourth pulse (D) may be measured.
本実施例によれば、パルスの全波検知を行い、１発目
と３発目、あるいは２発目と４発目のパルスの発生時点
間の時間間隔を計測する。すなわち、たとえば第４図の
Viがパルスカットオフ電圧より高いところで布量を検知
するものであって、このような減衰時間方式を採用した
場合、電源OFF後のコンデンサー端子電圧の周期は、ほ
ぼロータの回転周期と一致し、モータの抵抗値等のバラ
ツキの影響は受け難く、したがって減衰電圧方式を採用
する従来のように、洗濯機一台一台に投入される衣類の
負荷量計測値が異なり、精度が悪く、負荷量に応じた洗
濯時間やすすぎ、さらには負荷量に応じた水位を設定す
ることが難しいという問題はなくなる。According to the present embodiment, full-wave detection of pulses is performed and the time interval between the time points of occurrence of the first and third pulses or the second and fourth pulses is measured. That is, for example, in FIG.
When Vi is higher than the pulse cutoff voltage, the amount of cloth is detected, and when such a decay time method is adopted, the cycle of the capacitor terminal voltage after the power is turned off almost matches the rotation cycle of the rotor, It is not easily affected by variations in motor resistance, etc. Therefore, unlike the conventional method that uses the damping voltage method, the measured load value of the clothes put into each washing machine is different, resulting in poor accuracy and load amount. There is no problem that it is difficult to set the washing time and the washing time according to the above, and it is difficult to set the water level according to the load amount.
なお、本実施例では、布量検知補正ボタンを設けてあ
り、洗濯開始前（洗濯物投入前）にこのボタンを押すこ
とにより、水と洗濯物とがない状態で前述の布量検知行
程を実行してパルス間時間間隔t1を計測し、これとマイ
コンに予め記憶してあるパルス間時間間隔t1′と比較
し、（t1′−t1）を補正時間としてマイコンに記憶し、
それ以降の布量検知時のパルス間時間間隔t1に加えるこ
とにより、各洗濯機毎に負荷量を検知する初期のクラッ
チ装置10,駆動装置７のロストルクのバラツキ，モータ
8,コンデンサー8aの電気的特性およびパルス検知のため
のツエナーダイオード（ホ），フォトカプラ（ヘ）等の
バラツキを補正できるため、より精度の高い布量の計測
を行うことができる。In the present embodiment, a cloth amount detection correction button is provided, and by pressing this button before the start of washing (before the loading of laundry), the above-described cloth amount detection process can be performed without water and laundry. run measures the inter-pulse time interval t 1, 'as compared with, (t 1' inter-pulse time interval t 1 which is previously stored in this and the microcomputer and stored in the microcomputer as a correction time -t 1),
After that, by adding to the time interval t 1 between the pulses at the time of detecting the cloth amount, the initial clutch device 10 for detecting the load amount for each washing machine, the variation in the loss torque of the drive device 7, the motor, and the motor.
8. Since it is possible to correct variations in the electrical characteristics of the capacitor 8a and the zener diode (e), photocoupler (f), etc. for pulse detection, it is possible to measure the cloth amount with higher accuracy.
他の実施例として、布量検知時のパルス時間間隔t1の
計測を回転体６の時計方向回転と反時計方向回転時のそ
れぞれで行い、それぞれの計測時間の合計をマイコンに
記憶し、いずれの値も予めマイコンで決められた値以上
であれば各値を合計して計測値とし、決められた値以下
の場合には、異常としてブザー音，ランプ点滅等で表示
することによって安全性を確保することができる。As another embodiment, the pulse time interval t 1 at the time of detecting the cloth amount is measured at each of the clockwise rotation and the counterclockwise rotation of the rotating body 6, and the total of the respective measurement times is stored in the microcomputer. If the value of is greater than or equal to the value determined by the microcomputer in advance, the values are summed to obtain the measured value. Can be secured.
第５図は本発明の他の実施例を示す負荷量検知の回路
図、第６図はその出力波形を示した図であり、第５図の
回路構成によれば、その出力パルスは、第６図に示すよ
うに、半波整流された出力（Ａ）側のみとなる。FIG. 5 is a circuit diagram of load amount detection showing another embodiment of the present invention, and FIG. 6 is a diagram showing its output waveform. According to the circuit configuration of FIG. As shown in FIG. 6, only the half-wave rectified output (A) side is provided.
第３図の回路の全波検知方式によれば、直流矩形波パ
ルス変換時のレベルが決めるスレッシュホールド電圧を
低くした場合に出力（Ａ）側パルスと（Ｂ）側パルスが
重なり、連続した出力となることがあるが、本実施例で
は半波検知方式であるため、スレッシュホールド電圧を
波形の０クロスまで下げても矩形波パルスの前後の重な
りがなくなり、矩形波パルスの発生時点の判別がしやす
くなるのである。According to the full-wave detection method of the circuit of FIG. 3, when the threshold voltage determined by the level at the time of DC rectangular wave pulse conversion is lowered, the output (A) side pulse and the (B) side pulse overlap and a continuous output is produced. However, since the half-wave detection method is used in the present embodiment, even if the threshold voltage is lowered to the 0 cross of the waveform, the overlapping before and after the rectangular wave pulse is eliminated, and the time point of occurrence of the rectangular wave pulse can be determined. It will be easier to do.
以上に述べたとおり、本発明は、洗濯機内の攪拌翼を
駆動するモータと、モータ駆動用コンデンサーと、モー
タへの通電を制御する制御手段と、モータの駆動通電を
OFFした後の慣性回転中に発生するモータの逆起電力に
基づいて洗濯槽内の洗濯物負荷量を判定する洗濯機にお
いて、前記逆起電力の半波の矩形波パルスに変換するパ
ルス変換手段を設け、前に発生する矩形波パルスの発生
時点から後に発生する矩形波パルスの発生時点までの時
間間隔を計測して洗濯物負荷量を判定することを特徴と
する洗濯機の負荷量検知装置にある。As described above, the present invention provides a motor for driving a stirring blade in a washing machine, a motor driving capacitor, a control unit for controlling energization of the motor, and a motor energization of the motor.
In a washing machine that determines a load of laundry in a washing tub based on a back electromotive force of a motor generated during inertial rotation after being turned off, pulse conversion means for converting the back electromotive force into a half-wave rectangular wave pulse And a load amount detection device for a washing machine, characterized by measuring a time interval from a generation time point of a rectangular wave pulse generated before to a generation time point of a rectangular wave pulse generated later It is in.
この構成によれば、次のような良さがある。 This configuration has the following advantages.
（１）．慣性回転中に発生するモータの逆起電力を半波
の矩形波パルスに変換し、前に発生する矩形波パルスの
発生時点から後に発生する矩形波パルスの発生時点まで
の時間間隔を計測して洗濯物負荷量を判定するので、洗
濯物負荷量判定のバラツキが少ない。(1). The back electromotive force of the motor generated during inertial rotation is converted into a half-wave rectangular wave pulse, and the time interval from the time when the preceding rectangular wave pulse is generated to the time when the subsequent rectangular wave pulse is generated is measured. Since the laundry load amount is determined, there is little variation in the laundry load amount determination.
（２）．逆起電力を半波の矩形波パルスに変換するパル
ス変換手段で出力するようにしたので、スレッシュホー
ルド電圧を０クロスまで下げても矩形波パルスの前後の
重なりがなくなり、矩形波パルスの発生時点の判別がし
やすい。(2). Since the counter electromotive force is output by the pulse conversion means for converting into a half-wave rectangular wave pulse, even if the threshold voltage is reduced to 0 cross, the overlapping before and after the rectangular wave pulse disappears, and the time when the rectangular wave pulse is generated. It is easy to distinguish
第１図は全自動洗濯機の全体構成を示す縦断面図、第２
図は第１図に符号21で示す操作パネルの正面図、第３図
は負荷量検知の一実施例を示す回路図、第４図は第３図
の回路で検知した負荷量の出力波形図、第５図は負荷量
検知の他の実施例を示す回路図、第６図は第５図の回路
で検知した負荷量の出力波形図である。 ６……回転体、7a……ソレノイド、８……モータ、8a…
…コンデンサー、10……クラッチ装置、21……操作パネ
ル、26……給水電磁弁、29……電源スイッチボタン。FIG. 1 is a vertical sectional view showing the entire structure of a fully automatic washing machine,
1 is a front view of the operation panel indicated by reference numeral 21 in FIG. 1, FIG. 3 is a circuit diagram showing an embodiment of load amount detection, and FIG. 4 is an output waveform diagram of the load amount detected by the circuit of FIG. 5 is a circuit diagram showing another embodiment of load amount detection, and FIG. 6 is an output waveform diagram of the load amount detected by the circuit of FIG. 6 ... Rotating body, 7a ... Solenoid, 8 ... Motor, 8a ...
… Condenser, 10 …… Clutch device, 21 …… Operation panel, 26 …… Water supply solenoid valve, 29 …… Power switch button.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中野 重治 茨城県日立市東多賀町１丁目１番１号 株式会社日立製作所多賀工場内 (72)発明者 大杉 寛 茨城県日立市東多賀町１丁目１番１号 株式会社日立製作所多賀工場内 (56)参考文献 特開 昭64−15095（ＪＰ，Ａ) 特開 昭62−176492（ＪＰ，Ａ) 特開 昭63−318995（ＪＰ，Ａ) 特開 昭63−135196（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shigeharu Nakano 1-1-1, Higashi-Taga-cho, Hitachi-shi, Ibaraki Hitachi, Ltd. Taga factory (72) Inventor Hiroshi Osugi 1-1-1, Higa-Taga-cho, Hitachi-shi, Ibaraki No. 1 Hitachi Taga Factory (56) Reference JP-A 64-15095 (JP, A) JP-A 62-176492 (JP, A) JP-A 63-318995 (JP, A) JP A 63-135196 (JP, A)
Claims (1)
ータ駆動用コンデンサーと、モータへの通電を制御する
制御手段と、モータの駆動通電をOFFした後の慣性回転
中に発生するモータの逆起電力に基づいて洗濯槽内の洗
濯物負荷量を判定する洗濯機において、 前記逆起電力を半波の矩形波パルスに変換するパルス変
換手段を設け、前に発生する矩形波パルスの発生時点か
ら後に発生する矩形波パルスの発生時点までの時間間隔
を計測して洗濯物負荷量を判定することを特徴とする洗
濯機の負荷量検知装置。1. A motor for driving a stirring blade in a washing tub, a motor driving capacitor, a control means for controlling energization of the motor, and a motor generated during inertial rotation after the drive energization of the motor is turned off. In the washing machine for determining the laundry load amount in the washing tub on the basis of the back electromotive force, pulse conversion means for converting the back electromotive force into a half-wave rectangular wave pulse is provided, A load amount detection device for a washing machine, characterized by measuring a time interval from a generation time point to a generation time point of a rectangular wave pulse generated later to determine a laundry load amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1107658A JP2547448B2 (en) | 1989-04-28 | 1989-04-28 | Load detection device for washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1107658A JP2547448B2 (en) | 1989-04-28 | 1989-04-28 | Load detection device for washing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02286196A JPH02286196A (en) | 1990-11-26 |
| JP2547448B2 true JP2547448B2 (en) | 1996-10-23 |
Family
ID=14464749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1107658A Expired - Fee Related JP2547448B2 (en) | 1989-04-28 | 1989-04-28 | Load detection device for washing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2547448B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7025316B2 (en) | 2000-02-18 | 2006-04-11 | Fischerwerke Artur Fischer Gmbh & Co. Kg | Holder for a drink container |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2995957B2 (en) * | 1991-10-22 | 1999-12-27 | 株式会社日立製作所 | Washing machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176492A (en) * | 1986-01-30 | 1987-08-03 | シャープ株式会社 | Washing article amount detector of washing machine |
| JP2574305B2 (en) * | 1987-06-24 | 1997-01-22 | 松下電器産業株式会社 | Washing machine load detection device |
| JPS6415095A (en) * | 1987-07-09 | 1989-01-19 | Matsushita Electric Ind Co Ltd | Cloth amount detector of washing machine |
-
1989
- 1989-04-28 JP JP1107658A patent/JP2547448B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7025316B2 (en) | 2000-02-18 | 2006-04-11 | Fischerwerke Artur Fischer Gmbh & Co. Kg | Holder for a drink container |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02286196A (en) | 1990-11-26 |
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