JP2012170694A - Drum washing machine - Google Patents

Drum washing machine Download PDF

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JP2012170694A
JP2012170694A JP2011036751A JP2011036751A JP2012170694A JP 2012170694 A JP2012170694 A JP 2012170694A JP 2011036751 A JP2011036751 A JP 2011036751A JP 2011036751 A JP2011036751 A JP 2011036751A JP 2012170694 A JP2012170694 A JP 2012170694A
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water
water level
washing
supply
circulation pump
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Masanao Segawa
正尚 瀬川
Yutaka Inoue
豊 井上
Hiroko Minayoshi
裕子 皆吉
Hiroyuki Saito
弘幸 齊藤
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Panasonic Corp
パナソニック株式会社
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Abstract

PROBLEM TO BE SOLVED: To prevent water from overflowing during water supply by a water level detection to detect an abnormal foam generation.SOLUTION: A drum washing machine includes: a water tub 42 for supporting the shaft of a rotary drum 43 which is driven by a motor 45; water supply means 54 for supplying washing water; water level detection means 76 for detecting a water level in a water tub; a water circulation system 56 for jetting washing water in a water tub 42 into the rotary drum 43 by a circulation pump 67; a hot water heater 72 for heating washing water; control means 82 for controlling the motor 45, the water supply means 54, the circulation pump 67 and the hot water heater 72 to control each of the processes including water supplying, washing, rinsing, and dewatering. The control means 82 sets threshold values up to a dangerous water level (prescribed water level) corresponding to each of the water levels detected by water level detection means 76 in an initial stage of a process for supplying and agitating water for operating the circulation pump 67 and the hot water heater 72. When an amount of change in a water level signal becomes the threshold value or greater in the following processes, the control means 82 determines such as an abnormal foam generation. This machine can detect an abnormal foam generation with a constitution in which an influence of a water level variation or an amount of clothing is decreased and then switch to a defoaming process.

Description

本発明は、ドラム式洗濯機の制御に関するものである。   The present invention relates to control of a drum type washing machine.
従来、この種のドラム式洗濯機は、洗濯中に発生した洗剤泡による洗濯機の機能低下や、電気部分に付着して故障等を発生するのを防止する為に、水位検知手段の信号の変化により、の水槽内の洗剤泡の発生状態を検知し、以降の消泡行程、洗い行程、すすぎ行程及び給水手段、排水手段を制御することで対応してきた(例えば、特許文献1参照)。   Conventionally, this type of drum-type washing machine has a signal of the water level detection means in order to prevent deterioration of the function of the washing machine due to detergent bubbles generated during washing, and the occurrence of a failure due to adhesion to electrical parts. The change has been detected by detecting the generation state of detergent bubbles in the water tank and controlling the subsequent defoaming process, washing process, rinsing process, water supply means, and drainage means (see, for example, Patent Document 1).
図5は、特許文献1に記載された従来のドラム式洗濯機の制御フローチャートである。   FIG. 5 is a control flowchart of the conventional drum-type washing machine described in Patent Document 1.
なお、水位検知手段は、水圧をダイヤフラムで受圧し、その変化から得られる電磁コイルのインピーダンスの変化を出力として周波数に変換し、制御手段で水槽内の水位を検知するものである。   The water level detecting means receives water pressure with a diaphragm, converts the change in impedance of the electromagnetic coil obtained from the change into a frequency as an output, and detects the water level in the water tank with the control means.
図5に示すように、洗濯開始(ステップ100)し、給水弁にて規定の水位まで給水された後(ステップ101)、水位検知手段により、基準水位(圧力)としての基準値の設定を行う(ステップ102)。その後、基準値からの周波数変化が1.5kHzを超えた場合(ステップ103)、洗剤泡が異常なほど多量に発生していると判断し、排水(ステップ104)した後、消泡シーケンス(ステップ105)を例えば7分間行うものである。   As shown in FIG. 5, after washing is started (step 100) and water is supplied to a specified water level by a water supply valve (step 101), a reference value as a reference water level (pressure) is set by the water level detection means. (Step 102). After that, when the frequency change from the reference value exceeds 1.5 kHz (step 103), it is determined that the detergent foam is abnormally large, and after draining (step 104), the defoaming sequence (step 105) is performed for 7 minutes, for example.
さらに、ステップ103にて、基準水位からの周波数変化が1.5kHzよりも少なく、洗剤泡が異常発生していないと判断すると、次のステップ106にて基準水位からの周波数変化が1.0kHzを超える場合は、洗剤泡がやや多い状態であると判断し、洗剤泡が多量に発生した際の消泡シーケンス105までも行う必要なしと判断し、洗濯動作を弱くしたシーケンス(ステップ107)を3分間運転後に、通常シーケンス(ステップ108)に復帰する構成である。   Further, when it is determined in step 103 that the frequency change from the reference water level is less than 1.5 kHz and the detergent foam is not abnormally generated, in the next step 106, the frequency change from the reference water level is 1.0 kHz. If it exceeds, it is determined that the detergent foam is in a slightly large state, it is determined that it is not necessary to perform the defoaming sequence 105 when a large amount of detergent foam is generated, and the sequence (step 107) in which the washing operation is weakened is determined as 3 After a minute operation, the normal sequence (step 108) is restored.
特開2007−68678号公報JP 2007-68678 A
しかしながら、前記従来の構成では、水槽内圧力の検知で規定の水位(圧力)から所定の圧力変化を1.5kHzあるいは、1.0kHzとする閾値を超えるかどうかで判断するので、何らかの水位変動があった場合には、泡が発生していても泡発生と検知しないことがある一方、泡が発生していなくても泡発生している、と誤検知するという課題があった。   However, in the above-described conventional configuration, it is determined whether or not a predetermined pressure change exceeds a threshold value of 1.5 kHz or 1.0 kHz from the specified water level (pressure) by detecting the pressure in the water tank. In some cases, even if bubbles are generated, it may not be detected that bubbles are generated. On the other hand, there is a problem of erroneously detecting that bubbles are generated even if bubbles are not generated.
近年のドラム式洗濯機では、洗い行程時に水槽底部から循環ポンプで吸引し、回転ドラム内に吐出させる循環水を構成したり、水槽底部に温水ヒータ(加熱手段)を備えて洗濯水温を高める、等により洗浄効果を高める構成が一般的となっている。   In recent drum-type washing machines, circulating water is sucked with a circulation pump from the bottom of the water tank during the washing process and discharged into the rotating drum, or a warm water heater (heating means) is provided at the bottom of the water tank to increase the washing water temperature. The structure which raises a cleaning effect by etc. is common.
しかし、上記構成は、洗濯物の吸水が増大し水槽水位を変動させたり、洗剤泡の発生を増大させ、水位検知を正確に検知することが困難となっている。   However, the above configuration makes it difficult to accurately detect the water level by increasing the water absorption of the laundry and changing the water tank water level or increasing the generation of detergent bubbles.
たとえば、衣類量が多い場合には洗濯水が衣類に吸水され、水位そのものが低くなってしまう為、水位は規定の水位から低くなっている。従って、たとえ圧力変化が1.5kHz以上となる泡が発生しても、規定の水位(圧力)から1.5kHz以上圧力変化しないことになり、泡の発生大の状態を検知しない。   For example, when the amount of clothing is large, the washing water is absorbed by the clothing and the water level itself becomes low, so the water level is lower than the prescribed water level. Therefore, even if bubbles with a pressure change of 1.5 kHz or more are generated, the pressure does not change by 1.5 kHz or more from the specified water level (pressure), and the state of large generation of bubbles is not detected.
あるいは、使用者が補給水などで洗濯動作中に水槽内に洗濯水を投入したり、追加衣類を投入した場合は、水位そのものが規定水位より高くなっている。この場合には、たとえ圧力変化が1.5kHz以下であっても、規定の水位(圧力)から圧力変化が1.5kHz以上となり、僅かの泡発生でも泡発生大と誤検知してしまう。   Alternatively, when the user puts washing water into the water tank or puts additional clothes during the washing operation with makeup water or the like, the water level itself is higher than the specified water level. In this case, even if the pressure change is 1.5 kHz or less, the pressure change is 1.5 kHz or more from the specified water level (pressure), and even a slight bubble generation is erroneously detected as a large bubble generation.
本発明は、上記従来の課題を解決するもので、水位変動、衣類量の影響を低減した水位検知構成により、泡の発生を検知し泡により給水時の水の溢れによる洗濯機の機能低下や、電気部分に付着して故障等を発生するのを防止することを目的としている。   The present invention solves the above-described conventional problems, and the water level detection configuration that reduces the influence of water level fluctuation and the amount of clothes reduces the function of the washing machine due to the overflow of water during water supply by detecting the generation of foam and It is intended to prevent the occurrence of a failure or the like by adhering to an electrical part.
前記従来の課題を解決する為に、本発明のドラム式洗濯機は、壁面に複数の脱水孔を形成した回転ドラムを回転自在に軸支する水槽と、前記回転ドラムを回転駆動するモータと、前記水槽に洗剤及び洗濯水を供給する洗濯水兼洗剤供給装置と、前記洗濯水兼洗剤供給装置に洗濯水を供給する給水手段と、前記水槽内の洗濯水の水位を検知する水位検知手段と、前記水槽内の洗濯水を循環ポンプにより前記水槽に設けた噴出口から前記回転ドラム内に噴射して循環させる水循環系と、洗濯水を加熱する温水ヒータと、前記モータ、給水手段、循環ポンプ等を制御して、洗い、すすぎ、脱水等の各行程を制御する制御手段とを備え、前記制御手段は、洗い行程で洗濯水を加熱し、前記循環ポンプを動作させる給水攪拌行程の初期において、前記水位検知手段にて水位を検知し、検知した水位に応じた所定水位までの閾値を設定し、水位信号の変化量がそれぞれの閾値以上になれば泡発生異常と判定し、以降の行程を消泡行程に切り替える構成としたものである。   In order to solve the conventional problems, the drum type washing machine of the present invention includes a water tank that rotatably supports a rotating drum having a plurality of dewatering holes formed on a wall surface, a motor that rotationally drives the rotating drum, Washing water / detergent supply device for supplying detergent and washing water to the aquarium, water supply means for supplying washing water to the washing water / detergent supply device, and water level detection means for detecting the level of the washing water in the aquarium , A water circulation system that circulates the washing water in the water tub by spraying it into the rotating drum from a spout provided in the water tub by a circulation pump, a hot water heater that heats the washing water, the motor, water supply means, and a circulation pump Control means for controlling each process such as washing, rinsing, dehydration, etc., and the control means heats the wash water in the washing process and operates the circulation pump in the initial stage of the water supply stirring process The water The water level is detected by the detection means, a threshold value is set up to a predetermined water level according to the detected water level, and if the amount of change in the water level signal exceeds the respective threshold value, it is determined that foam generation is abnormal, and the subsequent strokes are eliminated. It is configured to switch to a stroke.
これにより、水位変動や衣類量の影響を少なくした構成で泡発生異常を検知し、以降の行程を消泡行程、の対処措置を取ることで、泡の過剰発生による被害、例えば、洗濯水兼洗剤供給装置からの水漏れ等の不具合や、電気部分に付着して故障等を発生することを防止するものである。   As a result, by detecting the occurrence of foam with a configuration that reduces the influence of fluctuations in water level and the amount of clothing, and taking measures to deal with the subsequent process of defoaming, damage caused by excessive generation of foam, such as washing water It is intended to prevent problems such as water leakage from the detergent supply device and occurrence of failure due to adhesion to the electrical part.
本発明のドラム式洗濯機は、泡の発生を検知し、泡により給水時の水溢れ等の機能低下や、電気部分に付着して故障する、等の不具合の発生を防止することができる。   The drum type washing machine of the present invention can detect the occurrence of foam and prevent the occurrence of malfunctions such as deterioration of function such as overflow of water when water is supplied due to foam and failure due to adhesion to electrical parts.
本発明の実施の形態におけるドラム式洗濯機の縦断面図The longitudinal cross-sectional view of the drum type washing machine in embodiment of this invention 同ドラム式洗濯機の一部ブロック化した制御回路図Control circuit diagram of a part of the drum type washing machine 同ドラム式洗濯機の制御フローチャートControl flow chart of the drum type washing machine 同ドラム式洗濯機の水位異常判定図Water level abnormality judgment diagram of the drum type washing machine 従来のドラム式洗濯機の制御フローチャートControl flow chart of conventional drum type washing machine
第1の発明は、壁面に複数の脱水孔を形成した回転ドラムを回転自在に軸支する水槽と、前記回転ドラムを回転駆動するモータと、前記水槽に洗剤及び洗濯水を供給する洗濯水兼洗剤供給装置と、前記洗濯水兼洗剤供給装置に洗濯水を供給する給水手段と、前記水槽内の洗濯水の水位を検知する水位検知手段と、前記水槽内の洗濯水を循環ポンプにより前記水槽に設けた噴出口から前記回転ドラム内に噴射して循環させる水循環系と、洗濯水を
加熱する温水ヒータと、前記モータ、給水手段、循環ポンプ等を制御して、洗い、すすぎ、脱水等の各行程を制御する制御手段とを備え、前記制御手段は、洗い行程で洗濯水を加熱し、前記循環ポンプを動作させる給水攪拌行程の初期において、前記水位検知手段にて水位を検知し、検知した水位に応じた所定水位までの閾値を設定し、水位信号の変化量がそれぞれの閾値以上になれば泡発生異常と判定し、以降の行程を消泡行程に切り替えることにより、水位変動に対応した水位検知手段により水槽内の水位を検知し、検知した水位に応じた危険水位(所定水位)までのそれぞれの所定の閾値を設定し、それぞれの水位変動に応じた閾値を設定するので検知の精度が高まり、誤検知や、検知不能という不具合を解消でき、以降の行程で泡発生異常と判定した場合の消泡行程、例えば、循環ポンプ、温水ヒータの駆動を一時的に停止したり、排水ポンプを一時的に駆動し水槽内の洗濯液を排出する、等の対処措置をより確実なものとできる。
According to a first aspect of the present invention, there is provided a water tank that rotatably supports a rotating drum having a plurality of dewatering holes formed on a wall surface, a motor that rotationally drives the rotating drum, and washing water that supplies detergent and washing water to the water tank. Detergent supply device, water supply means for supplying wash water to the washing water / detergent supply device, water level detection means for detecting the water level of the wash water in the water tub, and the water tank by means of a circulation pump for washing water in the water tub A water circulation system that circulates by being injected into the rotating drum from a jet outlet provided in a water heater, a hot water heater that heats washing water, the motor, a water supply means, a circulation pump, etc. are controlled to perform washing, rinsing, dehydration, etc. Control means for controlling each stroke, and the control means detects the water level by the water level detection means at the initial stage of the water supply stirring process for heating the wash water in the washing stroke and operating the circulation pump. Water level Set the threshold value up to the specified water level, and if the amount of change in the water level signal exceeds the respective threshold value, it is determined that bubbles are abnormally generated, and the subsequent stroke is switched to the defoaming stroke, thereby detecting the water level corresponding to the fluctuation in water level. Detecting the water level in the water tank by means, setting each predetermined threshold up to the dangerous water level (predetermined water level) according to the detected water level, and setting the threshold according to each water level fluctuation, so detection accuracy increases The problem of false detection and detection failure can be solved, and the defoaming process when it is determined that bubbles are abnormal in the subsequent processes, such as temporarily stopping the circulation pump and hot water heater, or temporarily turning off the drain pump It is possible to make the countermeasures such as driving automatically and discharging the washing liquid in the water tank more reliable.
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、従来例と同じ構成のものは同一符号を付して説明を省略する。また、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.
(実施の形態1)
図1は、本発明の実施の形態におけるドラム式洗濯機の縦断面図を示すものである。
(Embodiment 1)
FIG. 1 shows a longitudinal sectional view of a drum type washing machine in an embodiment of the present invention.
洗濯機筺体41の内部に揺動自在に水槽42が防振支持され、水槽42内には、回転ドラム43が回転自在に配設されている。回転ドラム43の回転中心に水平方向に回転軸(回転中心軸)44が設けられ、この回転軸44に、水槽42の背面側近傍に取り付けたモータ45が、ベルト46を介して連結され、モータ45により回転ドラム43が正転、逆転方向に回転駆動される。回転ドラム43の内壁面には、洗濯物を撹拌するための数個の突起板47が設けられている。また、回転ドラム43の外周部には、多数の通水孔48が全周面に設けられている。   A water tub 42 is supported in a vibration-proof manner inside the washing machine housing 41, and a rotating drum 43 is rotatably disposed in the water tub 42. A rotation shaft (rotation center shaft) 44 is provided in the horizontal direction at the rotation center of the rotating drum 43, and a motor 45 attached to the rotation shaft 44 in the vicinity of the back side of the water tank 42 is connected via a belt 46. The rotary drum 43 is rotated by 45 in the forward and reverse directions. Several protrusion plates 47 for stirring the laundry are provided on the inner wall surface of the rotating drum 43. In addition, a large number of water passage holes 48 are provided on the entire outer peripheral portion of the rotating drum 43.
上記の、水槽42、回転ドラム43、モータ45等により、振動系の水槽ユニット49が構成されており、この水槽ユニット49は、洗濯機筺体41上部から複数のばね体50により、また、洗濯機筺体41下部から複数の防振ダンパー51により防振支持されている。   The water tank 42, the rotating drum 43, the motor 45, and the like constitute a vibration water tank unit 49. The water tank unit 49 is formed by a plurality of spring bodies 50 from above the washing machine housing 41, and the washing machine. Anti-vibration is supported by a plurality of anti-vibration dampers 51 from the bottom of the housing 41.
また、水槽42の正面側で洗濯機筺体41に設けた開口部を、蓋体52により開閉自在に覆い、この蓋体52を開くことにより、衣類出入口53を通して回転ドラム43内に洗濯物を出し入れできるようにしている。   Further, the opening provided in the washing machine housing 41 on the front side of the water tub 42 is covered with a lid 52 so that the laundry can be opened and closed. By opening the lid 52, the laundry is put into and out of the rotary drum 43 through the clothing entrance 53. I can do it.
また、このドラム式洗濯機は、モード設定や制御プログラムに従い、モータ45、給水系54、排水系55、水循環系56を制御して、少なくとも洗い行程、すすぎ行程、脱水行程を行う機能を有している制御装置81を構成する(図2で詳述)。   This drum type washing machine has a function of controlling at least the washing process, the rinsing process, and the dehydrating process by controlling the motor 45, the water supply system 54, the drainage system 55, and the water circulation system 56 in accordance with the mode setting and control program. The control device 81 is configured (detailed in FIG. 2).
給水系54は、第1の電磁弁57(第1の給水手段)、あるいは第2の電磁弁58(第2の給水手段)の開閉によって、第1の給水ホース59、あるいは第2の給水ホース60を通り、洗剤や柔軟仕上げ剤を収容し外部から引き出し自在の引き出し部(図示せず)を内部に収納する洗濯水兼洗剤供給装置61を介して、給水経路62から水槽42内に適時に給水できる。   The water supply system 54 includes a first water supply hose 59 or a second water supply hose by opening and closing the first electromagnetic valve 57 (first water supply means) or the second electromagnetic valve 58 (second water supply means). 60 through the water supply path 62 into the aquarium 42 in a timely manner through a washing water / detergent supply device 61 that contains a detergent and a soft finish and stores a drawer (not shown) that can be pulled out from outside. Can supply water.
排水系55は、排水ポンプ63の駆動によって、洗い行程終了時、すすぎ行程終了時など必要なときに、水槽42の底部に接続された排水管64を介し、フィルタケース88に内設され、糸屑類を捕集する役目のリントフィルタ65を通過した後、排水ポンプ63を通って、機内から機外の上方まで配設された排水ホース66から吐出排水できるようにな
っている。
When the drainage pump 63 is driven, the drainage system 55 is installed in the filter case 88 via a drainage pipe 64 connected to the bottom of the water tank 42 when necessary at the end of the washing process, the end of the rinsing process, etc. After passing through a lint filter 65 that collects debris, the waste water can be discharged and drained from a drain hose 66 disposed from the inside of the machine to the top outside the machine through the drain pump 63.
水循環系56は、予洗い行程時、洗い行程時、すすぎ行程時など必要に応じ、水槽42内の水を循環させて、洗剤の早期溶解や、洗いやすすぎの機能向上を図る。   The water circulation system 56 circulates the water in the water tank 42 as necessary during the pre-washing process, the washing process, the rinsing process, and the like, thereby improving the function of dissolving the detergent early and rinsing easily.
この水循環系56は、循環ポンプ67を駆動させることで、水槽42内の洗濯水を、排水管64を介し、フィルタケース88内から吸引し、循環ポンプ67への流入側経路68、循環ポンプ67および循環ポンプ67からの吐出側経路69を介して、水槽42前面側内方の噴出口70より実線矢印で示す循環水として回転ドラム43内に吐出することを繰り返す。   The water circulation system 56 drives the circulation pump 67 to suck the washing water in the water tank 42 from the filter case 88 through the drain pipe 64, and the inflow side path 68 to the circulation pump 67 and the circulation pump 67. And it repeats discharging into the rotating drum 43 as circulating water shown by the solid line arrow from the outlet 70 on the front side of the water tank 42 through the discharge side path 69 from the circulation pump 67.
また、水槽42の底部に形成した凹部71には、洗濯水を加熱するシーズヒータ等からなる温水ヒータ(加熱手段)72を水平方向に備えており、この温水ヒータ72により加熱した水槽42内の洗濯水を、前述のように、回転ドラム43内に吐出することにより、洗濯水を洗濯物にふりかけて、この洗濯水を、また循環させる。これにより加熱された洗濯水が洗濯物にふりかけられる為、洗濯水の分子活動が高まり、また洗剤の活性化が高まるので、洗浄力を高め、かつ洗いムラを少なくする事ができるとともに、水槽42内や、回転ドラム43内に洗剤による泡の発生を生じる。   The recess 71 formed at the bottom of the water tank 42 is provided with a hot water heater (heating means) 72 such as a sheathed heater for heating the washing water in the horizontal direction. By discharging the washing water into the rotating drum 43 as described above, the washing water is sprinkled on the laundry and the washing water is circulated again. Since the heated washing water is sprinkled on the laundry, the molecular activity of the washing water is increased, and the activation of the detergent is increased. Therefore, the washing power can be increased and washing unevenness can be reduced. The generation of bubbles due to the detergent occurs inside and inside the rotating drum 43.
また、水槽42の底部外周後方の側壁には、排水管64と連通してエアートラップ74を構成し、空気管75にて、洗濯機筺体41の上部内方に設けられ、圧力センサーなどで構成された水位検知手段76に連接しており、外槽42内部に給水された洗濯水の水圧により複数段の水位を検知する事が出来る。   In addition, an air trap 74 is formed on the side wall of the bottom outer periphery of the water tank 42 in communication with the drain pipe 64. The air pipe 74 is provided on the upper inner side of the washing machine housing 41 by the air pipe 75, and is configured by a pressure sensor or the like. It is connected to the water level detecting means 76, and can detect the water level in a plurality of stages by the water pressure of the washing water supplied into the outer tub 42.
水位検知手段は、水圧をダイヤフラムで受圧し、その変化から得られる電磁コイルのインピーダンス変化を周波数に変換し、水槽内の水位を検知するもので、水圧を受けると周波数が減少する数値を示す特徴がある。   The water level detection means receives the water pressure with a diaphragm, converts the impedance change of the electromagnetic coil obtained from the change into a frequency, detects the water level in the aquarium, and shows the numerical value that decreases the frequency when receiving the water pressure There is.
また、洗濯機筺体41の上部内方に設けられた洗濯水兼洗剤供給装置61の後面上部と水槽42上部とを、可撓性の空気抜きホース77で連結しており、行程運転動作により加圧される水槽42内の圧力を減圧する役目をしている。   Further, the rear upper part of the washing water / detergent supply device 61 provided in the upper part of the washing machine housing 41 and the upper part of the water tank 42 are connected by a flexible air vent hose 77, and are pressurized by the stroke operation. It serves to reduce the pressure in the water tank 42.
水槽42内部に多量の泡が発生し空気抜きホース77内部に多量侵入すると、水槽42内の圧力を減圧できなくなり、洗濯水兼洗剤供給装置61に給水された水が給水経路62から正常に水槽42に流れず、洗濯水兼洗剤供給装置61部から機器の前方などから流れることになるので、この空気抜きホース77内部への泡侵入を防止する制御システムを以下詳述する。   If a large amount of bubbles are generated in the water tank 42 and a large amount of air enters the air vent hose 77, the pressure in the water tank 42 cannot be reduced, and the water supplied to the washing water / detergent supply device 61 is normally supplied from the water supply path 62 to the water tank 42. Therefore, the control system for preventing the intrusion of bubbles into the air vent hose 77 will be described in detail below.
図2は、本発明の実施の形態におけるドラム式洗濯機の、一部ブロック化した制御回路図である。   FIG. 2 is a partial block control circuit diagram of the drum type washing machine according to the embodiment of the present invention.
図2において、制御装置81の制御手段82は、マイクロコンピュータなどで構成し、商用電源83から、電源スイッチ84のONにより電力が供給されて動作を開始し、水位検知手段76、温度検知手段73、布量検知手段85、等の出力を入力し、入力設定手段80にて使用者の入力により設定された内容に基づいて、表示手段96に設定内容を表示するとともに、双方向サイリスタ、リレーなどで構成した負荷駆動手段86を介して、モータ45、温水ヒータ72、第1の電磁弁57、第2の電磁弁58、排水ポンプ63、循環ポンプ67、温水ヒータ72などの動作を制御し、洗い、すすぎ、脱水の各行程を制御する。   In FIG. 2, the control means 82 of the control device 81 is constituted by a microcomputer or the like, and starts operation when power is supplied from the commercial power supply 83 by turning on the power switch 84, and the water level detection means 76 and the temperature detection means 73. , The output of the cloth amount detecting means 85, etc. is input, and the setting contents are displayed on the display means 96 based on the contents set by the input of the user by the input setting means 80. The operation of the motor 45, the hot water heater 72, the first electromagnetic valve 57, the second electromagnetic valve 58, the drainage pump 63, the circulation pump 67, the hot water heater 72, etc. is controlled via the load driving means 86 constituted by Control each step of washing, rinsing and dehydration.
なお、前記水位検知手段76は、既述したように、水圧をダイヤフラムで受圧し、その変化から得られる電磁コイルのインピーダンスの変化を出力として周波数に変換した信号とし、その信号は制御手段82にて演算して水槽42内の水位を検知する構成である。   As described above, the water level detection means 76 receives the water pressure with the diaphragm, converts the impedance change of the electromagnetic coil obtained from the change into an output, and converts it into a frequency. The signal is sent to the control means 82. And calculating the water level in the water tank 42.
以上のように構成されたドラム式洗濯機について、以下その動作、作用を説明する。   About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.
図3は、本発明の実施の形態におけるドラム式洗濯機の標準的な運転コースであるCotton(綿衣類)コースの制御フローチャートで、洗い行程を主体的に記載している。   FIG. 3 is a control flowchart of the Cotton (cotton clothing) course, which is a standard operation course of the drum type washing machine in the embodiment of the present invention, and mainly describes the washing process.
図3において、まず、使用者が蓋体52を開け、回転ドラム43に衣類を投入してスタートし、Cotton(綿衣類)コースが選択されスタートする(ステップS1のYES)と、布量検知手段85にて投入された布量を検知(ステップS2)し、ステップS3で、制御手段82にて、布量に応じた水位と、その水位の水量に対する洗剤量が、表示手段96に表示される。   In FIG. 3, first, the user opens the lid 52, puts clothes into the rotating drum 43 and starts, and when the Cotton course is selected and started (YES in step S1), the cloth amount detection means The amount of cloth thrown in 85 is detected (step S2), and in step S3, the control means 82 displays on the display means 96 the water level corresponding to the cloth amount and the amount of detergent for the water level at that water level. .
ステップS4にて、使用者が表示された洗剤量を洗濯水兼洗剤供給装置61の引き出し部に投入すると、第1の電磁弁57が動作して給水が始まり、洗濯水兼洗剤供給装置61より洗剤とともに水道水が水槽42内に給水される(ステップS5)。   In step S4, when the user puts the displayed amount of detergent into the drawer of the washing water / detergent supply device 61, the first electromagnetic valve 57 operates to start water supply. Tap water is supplied into the water tank 42 together with the detergent (step S5).
ステップS5の給水行程では、回転ドラム43内の洗濯物のバランスを良くし、洗剤の溶解を促進するために、回転ドラム43が低速で回転する泡洗浄(ステップS6)を行なうに必要な少量の所定水位(S8)まで給水(S5)がなされる。   In the water supply process of step S5, in order to improve the balance of the laundry in the rotating drum 43 and promote the dissolution of the detergent, a small amount of foam necessary for performing the foam cleaning (step S6) in which the rotating drum 43 rotates at a low speed is performed. Water supply (S5) is performed up to a predetermined water level (S8).
泡洗浄(ステップS6)後に、給水攪拌行程Aが行われる(S9)。この給水攪拌A(S9)行程では、所定の水位に到達するまで水位検知(S12)しながら、回転ドラム43での攪拌を行うと共に、同時に、循環ポンプ67が1分間駆動し、水槽42内の洗濯水が循環水として水槽42前部の噴出口70より回転ドラム43内の洗濯物に向かって噴射されて、洗剤の溶解が促進され(ステップS10)、次に循環ポンプ67が1分間停止すると、第2の電磁弁58が開いて所定の水位まで給水される(ステップS11)という行程を、所定時間経過するまで継続する(S13)。   After the foam cleaning (step S6), a water supply stirring step A is performed (S9). In this water supply agitation A (S9) stroke, while the water level is detected (S12) until the predetermined water level is reached, the rotation drum 43 is agitated and, at the same time, the circulation pump 67 is driven for 1 minute, Washing water is sprayed as circulating water from the spout 70 at the front part of the water tank 42 toward the laundry in the rotating drum 43 to accelerate the dissolution of the detergent (step S10), and then the circulation pump 67 is stopped for one minute. The process of opening the second electromagnetic valve 58 and supplying water to a predetermined water level (step S11) is continued until a predetermined time elapses (S13).
給水中に循環ポンプ67を停止させるのは、水槽42内の水位を正しく検知するためである。   The reason why the circulation pump 67 is stopped during the water supply is to correctly detect the water level in the water tank 42.
次の、給水撹拌Bでは、モータ45が駆動して、給水撹拌Aよりも長い4分間回転ドラム43が回転し、洗濯物が撹拌される。同時に、第2の電磁弁58が開いて、所定水位まで給水されるが、この時、循環ポンプ67は停止している(ステップS15)。同時に、ステップS16で検知する水位が、所定の水位ランクに到達すると(ステップS17)、温水ヒータ72がONして(ステップS18)、洗濯水の加熱が始まる。この加熱は、設定温度になると停止し、温度が低下するとまた加熱されるということを繰り返し、洗い行程が終了するまで高温洗浄が行なわれる。次に、ステップS19の給水撹拌Cへ移る。   In the next water supply agitation B, the motor 45 is driven, the rotating drum 43 is rotated for 4 minutes longer than the water supply agitation A, and the laundry is agitated. At the same time, the second electromagnetic valve 58 is opened and water is supplied to a predetermined water level. At this time, the circulation pump 67 is stopped (step S15). At the same time, when the water level detected in step S16 reaches a predetermined water level rank (step S17), the hot water heater 72 is turned on (step S18), and heating of the washing water is started. This heating is stopped when the temperature reaches the set temperature, and when the temperature decreases, the heating is repeated, and high temperature cleaning is performed until the washing process is completed. Next, it moves to the water supply stirring C of step S19.
給水撹拌Cでは、給水撹拌Bと同様に、回転ドラム43が回転し、洗濯物が撹拌されるとともに、循環ポンプ67が駆動し、水槽42内の洗濯水が循環水として水槽42前部の噴出口70より回転ドラム43内に噴射される(ステップS20)。   In the water supply agitation C, similarly to the water supply agitation B, the rotating drum 43 rotates, the laundry is agitated, and the circulation pump 67 is driven. It is injected into the rotary drum 43 from the outlet 70 (step S20).
この時、洗濯水は加熱された状態となっているため、回転ドラム43内に噴射される洗濯水により、洗濯物に付着した汚れが浮きあがり易くなるとともに、洗濯水の分子活動が高まり、また洗剤の活性化が高まるので、洗浄力を高め、かつ、洗いむらを少なくすることができるが、泡もまた発生している。   At this time, since the washing water is in a heated state, the washing water sprayed into the rotating drum 43 makes it easy for the dirt attached to the laundry to float, and the molecular activity of the washing water increases. Since the activation of the detergent increases, the cleaning power can be increased and the unevenness of washing can be reduced, but bubbles are also generated.
そして、循環ポンプ67が停止していても、4分間の洗濯物撹拌が終わる(ステップS23)と、あるいは、洗濯水温度が所定温度以下であり(ステップS21のYES)、4分間の洗濯物撹拌が終わる(ステップS24)と、所定時間が経過していないと(ステップS25のNO)、給水撹拌Bを行ない、この4分間の給水撹拌Bと、4分間の給水撹拌Cを交互に繰り返して、所定時間経過すると(ステップS25のYES)、温水ヒータ72もOFFし(ステップS26)、洗い行程が終わる。   And even if the circulation pump 67 is stopped, when the laundry stirring for 4 minutes is finished (step S23), or the washing water temperature is lower than the predetermined temperature (YES in step S21), the laundry stirring for 4 minutes. When the predetermined time has not elapsed (NO in step S25), the feed water stirring B is performed, and this 4 minute feed water stirring B and the 4 minute feed water stirring C are alternately repeated. When the predetermined time has elapsed (YES in step S25), the hot water heater 72 is also turned off (step S26), and the washing process ends.
ここで、給水攪拌B(ステップS14)の初期行程中において、水位検知(ステップS16)および、給水撹拌C(ステップS19)の初期行程中の水位検知(ステップS27)により、水位信号が監視され、制御手段82に記憶され、かつ演算されている(ステップS28)。   Here, during the initial stroke of the feed water stirring B (step S14), the water level signal is monitored by the water level detection (step S16) and the water level detection during the initial stroke of the feed water stirring C (step S19) (step S27). It is stored and calculated in the control means 82 (step S28).
制御手段の演算結果(ステップ28)で、給水撹拌Bおよび給水撹拌Cの初期行程中における水位が、給水撹拌B(ステップS14)における所定の水位ランク(ステップS17)から、何らかの原因で変動していることがある。例えば、洗濯衣類には吸水力の高いものがあり洗濯水位を低下させてしまう場合や、逆に使用者が何らかの理由で補給水を実施した場合や、衣類を追加投入した場合には、水位が上昇してしまうことになり、基準から変動した水位となる。   In the calculation result of the control means (step 28), the water level during the initial stroke of the feed water stirring B and the feed water stirring C varies from the predetermined water level rank (step S17) in the feed water stirring B (step S14) for some reason. There may be. For example, if laundry clothes have a high water absorption capacity and the washing water level is lowered, or if the user performs makeup water for some reason, or if additional clothes are added, the water level The water level will rise, and the water level will fluctuate from the standard.
制御手段81は、ステップS16およびステップS27で監視し演算した結果に基づいて、現在の水位が基準水位(S29)にあるか変動水位(S34)を区分する。   The control means 81 classifies the current water level at the reference water level (S29) or the fluctuating water level (S34) based on the results of monitoring and calculation in steps S16 and S27.
それぞれの水位に基づいて、基準水位(S29)ならば、ステップS35の水位異常判定を行い、また、変動水位(S34)ならば、ステップS36の水位判定を行い、泡の発生の推測を行うものである。   Based on the respective water levels, if the reference water level (S29), the water level abnormality determination in step S35 is performed, and if it is the fluctuating water level (S34), the water level determination in step S36 is performed to estimate the generation of bubbles. It is.
その結果、水位異常(YES)と判断したら、所定の消泡制御を実行する(ステップS30)。   As a result, if it is determined that the water level is abnormal (YES), predetermined defoaming control is executed (step S30).
例えば、基準水位(S29)の場合は、水位検知で得られた水位信号の周波数は38KHzであり、泡の発生により水位が上昇すると周波数が低下し、危険水位(所定水位)を示す周波数37KHzとは1KHzの差があり、この閾値1KHz以上の周波数変動を検知すれば、泡異常と判定する。   For example, in the case of the reference water level (S29), the frequency of the water level signal obtained by the water level detection is 38 KHz, the frequency decreases when the water level rises due to the generation of bubbles, and the frequency 37 KHz indicating the dangerous water level (predetermined water level) There is a difference of 1 kHz, and if a frequency fluctuation of this threshold value of 1 kHz or more is detected, it is determined that the bubble is abnormal.
図4は、本発明の実施の形態におけるドラム式洗濯機の水位異常判定図である。   FIG. 4 is a water level abnormality determination diagram of the drum type washing machine in the embodiment of the present invention.
図4は、水位センサーが水位検知と水槽内の洗濯水位の高さを示す図であり、縦軸は水位高さ、横軸は水位検知の信号である周波数である。   FIG. 4 is a diagram showing the water level detection by the water level sensor and the height of the washing water level in the water tub. The vertical axis represents the water level height, and the horizontal axis represents the frequency that is a signal for detecting the water level.
基準水位は、回転ドラムの底部から40mmの高さにあり、この水位で検知される水位周波数は38.6KHzである。水位がこの基準水位であれば、泡発生の可能性が高くなる危険水位(所定水位)である回転ドラムの底部から150mmの高さにおける水位周波数37.6KHzとの差は、1.0KHzであるので、図3のフローチャートのステップS29とステップ35の水位検知の閾値は、1.0KHzとする。   The reference water level is at a height of 40 mm from the bottom of the rotating drum, and the water level frequency detected at this water level is 38.6 KHz. If the water level is this reference water level, the difference from the water level frequency of 37.6 KHz at a height of 150 mm from the bottom of the rotating drum, which is a dangerous water level (predetermined water level) where the possibility of foam generation is high, is 1.0 KHz. Therefore, the threshold value of the water level detection in step S29 and step 35 in the flowchart of FIG. 3 is 1.0 KHz.
水槽内の洗濯水を衣類等が吸収してLでしめす水位の低下した変動水位の場合は、水位周波数は38.8KHzを示し、この場合の危険水位(所定水位)150mmまでは1.2KHzの閾値となる。   In the case of a fluctuating water level in which the wash water in the aquarium absorbs clothes and the water level is lowered by L, the water level frequency is 38.8 KHz. In this case, the critical water level (predetermined water level) is 150 KHz up to 1.2 KHz. It becomes a threshold value.
逆に補給水等で水位がHで示す水位まで高まった変動水位の場合は、水位周波数が38.4KHzで、この場合の危険水位(所定水位)150mmまでは0.8KHzの閾値となる。   Conversely, in the case of a fluctuating water level where the water level has increased to a level indicated by H with make-up water or the like, the water level frequency is 38.4 KHz, and in this case, the threshold value is 0.8 KHz up to a critical water level (predetermined water level) of 150 mm.
制御手段は、給水攪拌行程の初期において、水位変動を検知し、水槽の泡による不具合が生じる危険水位(所定水位)までの高さより算出したそれぞれの閾値を設定するものである。   The control means detects the water level fluctuation at the initial stage of the water supply stirring process, and sets the respective threshold values calculated from the heights up to the dangerous water level (predetermined water level) at which a malfunction caused by bubbles in the water tank occurs.
従って、水位検知手段により水槽内の水位を検知し、それぞれの水位変動に応じた閾値を設定するので検知の精度が高まり、誤検知や、検知不能という不具合を解消できる。   Accordingly, the water level in the water tank is detected by the water level detection means, and the threshold value corresponding to each water level fluctuation is set, so that the detection accuracy is improved and the problems of false detection and inability to detect can be solved.
以上のように、本実施の形態においては、洗い行程で循環ポンプ駆動し、温水洗浄用の温水ヒータを動作した給水攪拌行程の初期において、水位変動に対応した水位検知手段により水槽内の水位を検知し、検知した水位に応じた危険水位(所定水位)までのそれぞれの所定の閾値を設定し、泡発生により水が上昇し水位信号の変化量がそれぞれの所定の閾値以上になれば、泡発生異常と判定し、以降の行程を消泡行程、例えば、循環ポンプ、温水ヒータの駆動を一時的に停止したり、排水ポンプを一時的に駆動し水槽内の洗濯液を排出する、等の対処措置を取ることで、泡の過剰発生による被害、例えば、洗濯水兼洗剤供給装置からの水漏れ等の不具合や、電気部分に付着して故障等を発生することを防止するものである。   As described above, in the present embodiment, the water level in the water tank is adjusted by the water level detection means corresponding to the water level fluctuation at the initial stage of the water supply and agitation process in which the circulation pump is driven in the washing process and the hot water heater for hot water cleaning is operated. Detect and set each predetermined threshold up to the dangerous water level (predetermined water level) according to the detected water level, if the water rises due to bubble generation and the amount of change in the water level signal exceeds the predetermined threshold, the bubbles Determining the occurrence of abnormalities, the subsequent strokes are defoaming strokes, such as temporarily stopping the circulation pump and hot water heater, or draining the washing liquid in the water tank by temporarily driving the drainage pump, etc. By taking countermeasures, it is possible to prevent damage caused by excessive foaming, for example, problems such as water leakage from the washing water / detergent supply device, or failure due to adhesion to electrical parts.
以上のように、本発明にかかるドラム式洗濯機は、泡により給水時の水溢れでの機能低下や、電気部分に付着して故障等を発生することを防止するする構成であり、ドラム式以外の一般の洗濯機等の用途にも適用できる。   As described above, the drum-type washing machine according to the present invention is configured to prevent deterioration in function due to overflow of water when water is supplied due to foam, or occurrence of a failure or the like by adhering to an electrical part. It can be applied to other uses such as general washing machines.
41 洗濯機筺体
42 水槽
43 回転ドラム
45 モータ
54 給水系(給水手段)
56 水循環系
59 第1の給水ホース
60 第2の給水ホース
61 洗濯水兼洗剤供給装置
62 給水経路
65 リントフィルタ
67 循環ポンプ
70 噴出口
72 温水ヒータ
73 温度検知手段
76 水位検知手段
77 空気抜きホース
79 操作表示手段
80 入力設定手段
81 制御装置
82 制御手段
41 Washing machine housing 42 Water tank 43 Rotating drum 45 Motor 54 Water supply system (water supply means)
DESCRIPTION OF SYMBOLS 56 Water circulation system 59 1st water supply hose 60 2nd water supply hose 61 Washing water and detergent supply apparatus 62 Water supply path 65 Lint filter 67 Circulation pump 70 Jet outlet 72 Hot water heater 73 Temperature detection means 76 Water level detection means 77 Air vent hose 79 Operation Display means 80 Input setting means 81 Control device 82 Control means

Claims (1)

  1. 壁面に複数の脱水孔を形成した回転ドラムを回転自在に軸支する水槽と、前記回転ドラムを回転駆動するモータと、前記水槽に洗剤及び洗濯水を供給する洗濯水兼洗剤供給装置と、前記洗濯水兼洗剤供給装置に洗濯水を供給する給水手段と、前記水槽内の洗濯水の水位を検知する水位検知手段と、前記水槽内の洗濯水を循環ポンプにより前記水槽に設けた噴出口から前記回転ドラム内に噴射して循環させる水循環系と、洗濯水を加熱する温水ヒータと、前記モータ、給水手段、循環ポンプ等を制御して、洗い、すすぎ、脱水等の各行程を制御する制御手段とを備え、前記制御手段は、洗い行程で洗濯水を加熱し、前記循環ポンプを動作させる給水攪拌行程の初期において、前記水位検知手段にて水位を検知し、検知した水位に応じた所定水位までの閾値を設定し、水位信号の変化量がそれぞれの閾値以上になれば泡発生異常と判定し、以降の行程を消泡行程に切り替えるドラム式洗濯機。 A water tank that rotatably supports a rotating drum having a plurality of dewatering holes formed on a wall surface, a motor that rotationally drives the rotating drum, a washing water and detergent supply device that supplies detergent and washing water to the water tank, and Water supply means for supplying washing water to the washing water / detergent supply device, water level detection means for detecting the water level of the washing water in the water tank, and a spout provided in the water tank by the circulation pump for washing water in the water tank Control for controlling each process of washing, rinsing, dehydration, etc. by controlling the water circulation system that circulates by being injected into the rotating drum, the hot water heater that heats the washing water, the motor, the water supply means, the circulation pump, etc. And the control means detects the water level by the water level detection means at the initial stage of the water supply stirring process for heating the wash water in the washing process and operating the circulation pump, and determines the predetermined level according to the detected water level. Water level Setting a threshold at, if the amount of change in water level signal is equal to or greater than the respective thresholds is determined that foam generation abnormality, a drum type washing machine that switches the subsequent stroke defoaming stroke.
JP2011036751A 2011-02-23 2011-02-23 Drum washing machine Withdrawn JP2012170694A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105492676A (en) * 2013-08-23 2016-04-13 Bsh家用电器有限公司 Laundry care appliance
CN105544145A (en) * 2016-02-01 2016-05-04 珠海格力电器股份有限公司 Roller washing machine and foam detection method thereof
CN107475990A (en) * 2016-06-08 2017-12-15 Lg电子株式会社 Clothes treatment device and its control method
WO2020263003A1 (en) * 2019-06-28 2020-12-30 엘지전자 주식회사 Washing machine and method for controlling washing machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105492676A (en) * 2013-08-23 2016-04-13 Bsh家用电器有限公司 Laundry care appliance
CN105492676B (en) * 2013-08-23 2018-01-05 Bsh家用电器有限公司 laundry treatment appliance
CN105544145A (en) * 2016-02-01 2016-05-04 珠海格力电器股份有限公司 Roller washing machine and foam detection method thereof
CN105544145B (en) * 2016-02-01 2018-05-18 珠海格力电器股份有限公司 Roller washing machine and its foam detecting method
CN107475990A (en) * 2016-06-08 2017-12-15 Lg电子株式会社 Clothes treatment device and its control method
WO2020263003A1 (en) * 2019-06-28 2020-12-30 엘지전자 주식회사 Washing machine and method for controlling washing machine

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