JP2011000255A

JP2011000255A - Dishwasher

Info

Publication number: JP2011000255A
Application number: JP2009144910A
Authority: JP
Inventors: Tomohiro Fujii; 友弘藤井; Tomoaki Kajiura; 智彰梶浦
Original assignee: Panasonic Corp
Current assignee: Panasonic Corp
Priority date: 2009-06-18
Filing date: 2009-06-18
Publication date: 2011-01-06

Abstract

PROBLEM TO BE SOLVED: To solve the problems that detection may be erroneous since the water amount of draining varies in the configuration of detecting the end of draining by the reduction of washing water and a residual water amount increases without performing sufficient draining, and the problems that the complicated constitution of an inverter circuit or the like is needed in order to execute fine control of lowering a pump rotation number or the like during a draining operation and a cost increases.SOLUTION: The dishwasher includes: a current detection means 103 for detecting a current flowing to a single phase induction motor 104; a control means 101; a timer means 106 for measuring the fixed time after the current of the current detection means 103 shifts to a fixed value or below; and a determination means 102 for determining a draining operation state from a current value in the current detection means 103 and the timer means 106. When the current value in the current detection means 103 continues to be the fixed value or below for the fixed time, it is determined that draining is ended and it is accurately stopped in an early stage.

Description

本発明は洗浄および排水を一つのモータおよびポンプでおこなう食器類を洗う食器洗い機に関するものである。 The present invention relates to a dishwasher for washing dishes in which washing and drainage are performed by a single motor and pump.

従来の食器洗い機は、図５に示すように直流出力電圧を供給する直流電圧可変回路１６と、直流電圧を交流電圧変換するインバータ回路１７と、前記インバータ回路１７が出力する交流電圧を印加する直流ブラシレス電動機１２と、前記直流ブラシレス電動機１２により駆動するポンプ７とを備え、前記ポンプ７が洗浄水を加圧噴射して食器を洗浄することにより、高速回転により噴射力を高めて強い洗浄力を発生させ、低速回転により弱い噴射力で静音洗浄するようにしたものである。また、排水末期に洗浄水が減少した際にインバータ回路７から供給する直流電圧を低くしてブラシレス電動機１２（ポンプ）の回転速度を低くすることにより、ポンプの騒音発生を防止するものである。（特許文献１参照） As shown in FIG. 5, the conventional dishwasher includes a DC voltage variable circuit 16 that supplies a DC output voltage, an inverter circuit 17 that converts the DC voltage into an AC voltage, and a DC that applies the AC voltage output from the inverter circuit 17. A brushless motor 12 and a pump 7 driven by the DC brushless motor 12 are provided, and the pump 7 pressurizes and sprays washing water to wash dishes, thereby increasing the jetting power by high-speed rotation and providing a strong cleaning power. It is generated and quietly cleaned with a weak jet force by low-speed rotation. Further, when washing water decreases at the end of drainage, the DC voltage supplied from the inverter circuit 7 is lowered to lower the rotational speed of the brushless electric motor 12 (pump), thereby preventing pump noise. (See Patent Document 1)

特開２００１−３７７００号公報JP 2001-37700 A

しかしながら、前記従来の構成では、直流電圧可変回路やインバータ回路、直流ブラシレス電動機とから構成し、構成が複雑かつコストが高価になり、排水末期を洗浄水減少により検知する構成となっており、余分に構成部品が必要となるという課題があった。 However, the conventional configuration is composed of a DC voltage variable circuit, an inverter circuit, and a DC brushless motor. The configuration is complicated and expensive, and the end of drainage is detected by a decrease in washing water. However, there is a problem that a component is required.

また、一般的に安価な構成の食器洗い機では、直流電圧可変回路やインバータ回路を搭載せず、商用電源の電圧を単相誘導モータに印加するのみでポンプを駆動すること構成となっており、その場合には、ポンプの回転数を低下させるなどの細かな制御はできない。 In general, a dishwasher with a low-cost configuration does not include a DC voltage variable circuit or an inverter circuit, and is configured to drive a pump only by applying a commercial power supply voltage to a single-phase induction motor. In that case, fine control such as reducing the rotational speed of the pump is not possible.

さらに排水動作は、一定時間、洗浄兼排水ポンプを排水側に単相誘導モータを回転させ、排水の減少検知で時間経過の後に停止することとなり、残水や排水時間が延びるなどの課題があった。また、排水の洗浄水減少を検知する場合には、排水の水量変動が発生するために誤検知をおこなう場合があり十分な排水ができずに残水量が増えるなどの課題もあった。 In addition, the drainage operation has a problem that the remaining water and drainage time are extended because the single phase induction motor is rotated to the drainage side for a certain time and the single-phase induction motor is rotated to stop after a lapse of time when the decrease in drainage is detected. It was. In addition, when detecting a decrease in the washing water of the waste water, there is a problem that a false detection is performed because of a fluctuation in the amount of the waste water, and there is a problem that the amount of remaining water increases due to insufficient drainage.

本発明は、前記従来の課題を解決するもので、単相誘導モータを使用する安価な構成でモータ電流を検出する電流検知手段の電流変化により排水状態を容易に検知することができ、排水時間の短縮やモータの消費電力低減をすることができる食器洗い機を提供することを目的とする。 The present invention solves the above-mentioned conventional problems, and can easily detect the drainage state by the current change of the current detection means for detecting the motor current with an inexpensive configuration using a single-phase induction motor, and the drainage time. An object of the present invention is to provide a dishwasher capable of shortening the power consumption and reducing the power consumption of a motor.

食器を収納する洗浄槽と、洗浄槽内に水を吐出供給するポンプと、ポンプを駆動する単相誘導モータと、単相誘導モータに流れる電流を検知する電流検知手段と、単相誘導モータに商用電源電圧をコンデンサ始動として印加駆動をおこなう制御手段と、電流検知手段の電流が一定値以下に移行した後に一定時間を計測するタイマー手段と、電流検知手段の電流値とタイマー手段から排水動作状態を判断する判定手段とを備え、判定手段が電流検出手段の電流値が一定値以下を一定時間継続した場合に排水終了と判断するものである。 A washing tank for storing tableware, a pump for discharging water into the washing tank, a single-phase induction motor for driving the pump, a current detecting means for detecting a current flowing through the single-phase induction motor, and a single-phase induction motor Control means for applying and driving the commercial power supply voltage as a capacitor start, timer means for measuring a certain time after the current of the current detection means shifts to a predetermined value or less, drainage operation state from the current value of the current detection means and the timer means The determination means determines that the drainage is finished when the current value of the current detection means continues for a certain period of time below the predetermined value.

これによって、安価な構成の食器洗い機でも排水を容易に判定でき排水時間の短縮ができる。 This makes it possible to easily determine drainage even with an inexpensive dishwasher, and to reduce drainage time.

本発明の食器洗い機によれば、電流検知手段と判定手段を設け、電流検知手段が単相誘導モータの電流を検知し、排水時の排水状態を常に把握することで排水が終了したか継続中かを判定することができ、無駄に排水時間を延ばすことも防止できる。また、電流変化による電流検出により、排水時の水量減少検知による誤動作の防止もおこなうことができる。 According to the dishwasher of the present invention, the current detection means and the determination means are provided, and the current detection means detects the current of the single-phase induction motor, and the drainage is completed by continuing to grasp the drainage state at the time of drainage. It is possible to determine whether or not the drainage time is unnecessarily prolonged. Moreover, the malfunction detection by the water amount reduction | decrease detection at the time of drainage can also be performed by the current detection by a current change.

本発明の実施の形態１における食器洗い機のブロック構成図The block diagram of the dishwasher in Embodiment 1 of this invention 本発明の実施の形態１における食器洗い機の排水動作時の電流時間変化を示す図The figure which shows the electric current time change at the time of the drainage operation | movement of the dishwasher in Embodiment 1 of this invention. 本発明の実施の形態１における食器洗い機の動作フローチャートOperation flow chart of dishwasher in Embodiment 1 of the present invention 本発明の実施の形態２における食器洗い機のブロック構成図Block configuration diagram of the dishwasher in Embodiment 2 of the present invention 本発明の実施の形態２における食器洗い機の排水動作時の電流時間変化を示す図The figure which shows the electric current time change at the time of the drainage operation | movement of the dishwasher in Embodiment 2 of this invention. 本発明の実施の形態２における食器洗い機の動作フローチャートOperation flow chart of dishwasher in embodiment 2 of the present invention 従来の食器洗い機の構成図Configuration of a conventional dishwasher

第１の発明は、食器を収納する洗浄槽と、洗浄槽内に水を吐出供給するポンプと、ポンプを駆動する単相誘導モータと、単相誘導モータに流れる電流を検知する電流検知手段と、単相誘導モータに商用電源電圧をコンデンサ始動として印加駆動をおこなう制御手段と、電流検知手段の電流が一定値以下に移行した後に一定時間を計測するタイマー手段と、電流検知手段の電流値とタイマー手段から排水動作状態を判断する判定手段とを備えることにより、判定手段が電流検出手段の電流値が一定値以下を一定時間継続した場合に排水終了と判断することで、単相誘導モータを使用する安価な構成で、容易に排水状態を検知することができ、排水時間の短縮やモータの消費電力低減をすることができ、経済性に優れている。 The first invention includes a washing tank for storing tableware, a pump for discharging water into the washing tank, a single-phase induction motor for driving the pump, and a current detection means for detecting a current flowing through the single-phase induction motor. A control means for applying and driving a commercial power supply voltage to a single-phase induction motor as a capacitor start, a timer means for measuring a fixed time after the current of the current detection means has shifted to a predetermined value or less, and a current value of the current detection means A determination means for determining the drainage operation state from the timer means, so that the determination means determines that the drainage is finished when the current value of the current detection means continues below a certain value for a certain period of time. With an inexpensive configuration to be used, the drainage state can be easily detected, the drainage time can be shortened, and the power consumption of the motor can be reduced.

第２の発明は、食器を収納する洗浄槽と、洗浄槽内に水を吐出供給するポンプと、ポンプを駆動する単相誘導モータと、単相誘導モータに流れる電流を検知する電流検知手段と、単相誘導モータに商用電源電圧をコンデンサ始動として印加駆動をおこなう制御手段と、電流検知手段の電流値が一定値以下に移行した値を記録する第一記録手段と、その後制御手段が単相誘導モータを動作停止し、一定時間経過後に動作再開後の電流検知手段の電流値を記録する第二記録手段と、第一記録手段および第二記録手段の電流値とから排水動作状態を判断する判定手段とを備えることにより、判定手段が第一記録手段の電流値と第二記録手段の電流値とが同じ場合に、排水終了と判断することで、単相誘導モータを使用する安価な構成で、エア噛みによる排水終了の誤判定を防止することができ、正確で容易に排水状態の検出ができる。さらに正確な排水検出による排水時間の短縮やモータ消費電力の低減を更におこなうことができ、経済性に優れている。 The second invention includes a washing tank for storing tableware, a pump for discharging water into the washing tank, a single-phase induction motor for driving the pump, and a current detection means for detecting a current flowing through the single-phase induction motor. A control means for applying and driving the commercial power supply voltage to the single-phase induction motor as a capacitor start, a first recording means for recording a value when the current value of the current detection means has shifted to a predetermined value or less, and then the control means is a single-phase The operation of the induction motor is stopped, and the drainage operation state is judged from the second recording means for recording the current value of the current detection means after the resumption of operation after a certain time has elapsed, and the current values of the first recording means and the second recording means. By providing the determination unit, the determination unit determines that the drainage is finished when the current value of the first recording unit and the current value of the second recording unit are the same, and thus an inexpensive configuration using a single-phase induction motor. In the air bite That drainage end of misjudgment can be prevented, it can be detected accurately and easily drained state. Furthermore, the drainage time can be further shortened by accurate drainage detection and the motor power consumption can be further reduced.

第３の発明は、判定手段は、電流検知手段の電流値が一定値以下に移行した後に、単相誘導モータの動作停止および動作開始を複数回繰り返し、複数回の第一記録手段の電流値と第二記録手段の電流値を比較し、継続して電流値に変化がない場合、排水終了と判断することで、複数回繰り返すことによりエア噛みや排水時の洗浄水の変動による誤検知を防止できる上に排水検知精度をさらに向上できる。 According to a third aspect of the present invention, the determination means repeats the operation stop and operation start of the single-phase induction motor a plurality of times after the current value of the current detection means shifts to a predetermined value or less, and the current value of the first recording means a plurality of times And the current value of the second recording means, and if there is no change in the current value continuously, it is judged that drainage has ended, and by repeating multiple times, erroneous detection due to air biting or fluctuations in the wash water during drainage is performed. In addition to preventing this, the accuracy of wastewater detection can be further improved.

第４の発明は、電流検知手段が、単相誘導モータの印加電圧と電流値から算出される電力検知手段とすることにより、単相誘導モータを使用する安価な構成で、容易に排水状態を検知することができ、排水時間の短縮やモータの消費電力低減をすることができ、経済性に優れているとともに、電力値により負荷変化を正確に検知することができ、排水終了の検出が向上できる。 According to a fourth aspect of the present invention, the current detection means is a power detection means calculated from the applied voltage and current value of the single-phase induction motor, so that the drainage state can be easily obtained with an inexpensive configuration using the single-phase induction motor. It can detect, shorten drainage time, reduce motor power consumption, and is economical, and it can detect load change accurately by power value, improving drainage end detection. it can.

（実施の形態１）
以下、本発明の実施の形態１について図面を用いて説明する。 (Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings.

図１は、本発明の実施の形態における食器洗い機のブロック図を示したもので、図１において、商用電源１００を食器洗い機に接続し、食器洗い機内部の構成は、制御手段１０１と、洗浄排水ポンプ１０５を駆動する単相誘導モータ１０４と、単相誘導モータ１０４に流れる電流を検出する電流検知手段１０３と、その電流検知手段１０３の電流値の流れている時間を測定するタイマー手段１０６と、電流検知手段１０３の電流値とタイマー手段１０６の時間とから排水が終了したかどうかを判断する判定手段１０２とから構成されている。 FIG. 1 is a block diagram of a dishwasher according to an embodiment of the present invention. In FIG. 1, a commercial power source 100 is connected to the dishwasher. A single-phase induction motor 104 for driving the pump 105, a current detection means 103 for detecting a current flowing through the single-phase induction motor 104, a timer means 106 for measuring a time during which a current value of the current detection means 103 flows, It is comprised from the determination means 102 which judges whether drainage was complete | finished from the electric current value of the electric current detection means 103, and the time of the timer means 106. FIG.

次に図２は、排水動作時の単相誘導モータ１０４に流れる電流値の時間変化を示したグラフである。排水開始時に単相誘導モータ１０４の始動（ａ）、正常な排水動作（ｂ）、排水終了間際でのエア噛み動作（ｃ）、排水終了動作（ｄ）の各期間における電流検知手段１０３が検知する電流値が、排水電流２００、エア噛み電流２０１、排水終了電流２０２を示しており、排水電流２００とエア噛み電流２０１との差が第一電流差２０５、排水電流２００と排水終了電流２０２との差が第二電流差２０３を示している。 Next, FIG. 2 is a graph showing the change over time of the current value flowing through the single-phase induction motor 104 during the draining operation. When the drainage starts, the current detection means 103 detects the start of the single-phase induction motor 104 (a), normal drainage operation (b), air biting operation just before the end of drainage (c), and drainage end operation (d). The drain current 200, the air biting current 201, and the drainage end current 202 are the current values of the first current difference 205, the drainage current 200 and the drainage end current 202. Indicates a second current difference 203.

また、エア噛み動作（ｃ）から排水終了動作（ｄ）に移行し、排水が終了するまでの時間である排水終了判定時間２０４を示している。 Further, a drainage end determination time 204, which is a time from the transition from the air biting operation (c) to the drainage end operation (d) to the end of drainage, is shown.

次に、本実施の形態１の食器洗い機の動作について説明する。図３は排水検知のフローチャートを示す。 Next, operation | movement of the dishwasher of this Embodiment 1 is demonstrated. FIG. 3 shows a flowchart of waste water detection.

まず、図１の食器洗い機本体１０Ａは、制御手段１０１が単相誘導モータ１０４に対して洗浄または排水をおこなう場合に商用電源１００の電圧を印加する。その際にコンデンサ１０９を介して洗浄時と排水時を切換えて制御をおこない、電圧は商用電源１００をそのまま印加する。 First, the dishwasher body 10 </ b> A in FIG. 1 applies the voltage of the commercial power supply 100 when the control unit 101 performs cleaning or drainage on the single-phase induction motor 104. At that time, control is performed by switching between washing and draining via the capacitor 109, and the commercial power supply 100 is applied as the voltage.

排水時（フローチャートＳ１）に印加された電圧により単相誘導モータ１０４は回転し（フローチャートＳ２）、その回転軸に接続された洗浄排水ポンプ１０５は、排水をおこなう。正常な排水時には電流検知手段１０３の電流値が一定電流となる排水電流２００として流れ安定している（フローチャートＳ３）。排水終了間際では、一旦洗浄排水ポンプ１０５が給水に気泡が混じり、エア噛み状態となることで電流検知手段１０３の電流値がエア噛み電流２０１に電流差２０５だけ低下し、低下しながら一定幅で変動する（フローチャートＳ３）。その状態が一定時間継続時（ｃ）後、給水が無くなり排水終了（ｄ）となり、その時の電流検知手段１０３の電流値が排水終了電流２０２となる（フローチャートＳ４）。 The single-phase induction motor 104 is rotated by the voltage applied during drainage (flowchart S1) (flowchart S2), and the washing drain pump 105 connected to the rotating shaft drains. During normal drainage, the current value of the current detection means 103 flows as a drainage current 200 with a constant current and is stable (flow chart S3). Just before the end of drainage, once the cleaning / drainage pump 105 is mixed with bubbles in the water supply and enters the air-engaged state, the current value of the current detection means 103 is reduced to the air-engagement current 201 by a current difference 205, with a constant width while decreasing. It fluctuates (flow chart S3). When the state continues for a certain time (c), water supply is lost and drainage ends (d), and the current value of the current detection means 103 at that time becomes drainage end current 202 (flow chart S4).

その排水終了電流２０２を一定時間継続し、排水終了判定時間２０４だけ継続した場合に（フローチャートＳ５）、エア噛み（ｃ）動作から排水終了（ｄ）動作までの一連の継続動作により排水が終了（フローチャートＳ６）したと判断し、制御手段１０１は単相誘導モータ１０４に対して商用電源１００の電源印加を停止する。同時に洗浄排水ポンプ１０５も停止することで排水が停止される。 When the drainage end current 202 is continued for a certain period of time and continues for the drainage end determination time 204 (flowchart S5), drainage is completed by a series of continuous operations from the air biting (c) operation to the drainage end (d) operation ( The control unit 101 determines that the flowchart S6) has been performed, and stops the application of the commercial power supply 100 to the single-phase induction motor 104. At the same time, the drainage is stopped by stopping the washing drain pump 105.

このような動作をすることで、排水電流２００から必ず一旦エア噛み電流２０１に移行し一定時間継続後に排水終了（ｄ）の動作に移行し、その時のが電流検知手段１０３の電流値２０２とタイマー手段１０６の排水終了判定時間２０４がともに成立するという一連の動作によって排水終了を正確に判断することができ、無駄に排水時間を継続することで消費電力を増加することを防止できる。 By performing such an operation, the drainage current 200 is always shifted once to the air biting current 201, and after continuing for a certain period of time, the drainage is ended (d). The current value 202 of the current detection means 103 and the timer are at that time. It is possible to accurately determine the end of drainage by a series of operations in which the drainage end determination time 204 of both means 106 is established, and it is possible to prevent the power consumption from increasing by wastefully continuing the drainage time.

排水終了を給水部の水位検知等でおこなう場合では、エア噛み（ｃ）の期間で、水位が変動するため誤検知する可能性もあり、水位検知手段のみで判断ができないため一定時間排水動作を継続する必要があり無駄な排水動作時間が存在していたが、電流検知手段１０３を設け、電流検知手段１０３の電流変化とタイマー手段１０６の排水終了電流２０２の保持時間により判定することで正確に排水終了を判断でき、無駄な排水動作時間を削減でき、時間短縮も可能である。 When drainage is terminated by detecting the water level of the water supply section, etc., the water level may fluctuate during the air biting (c) period, and there is a possibility of false detection. Although there is a wasteful drainage operation time that needs to be continued, the current detection means 103 is provided, and the current detection means 103 is accurately determined by determining the current change of the current detection means 103 and the holding time of the drainage end current 202 of the timer means 106. The end of drainage can be determined, wasteful drainage operation time can be reduced, and the time can be shortened.

ここでは、排水終了判定時間２０４をあらかじめ固定値として、排水路長を加味して決めておくものとしているが、エア噛み（ｃ）の時間をタイマー手段１０６が計測し、一定時間継続後に排水終了（ｄ）の排水終了電流２０２に移行した条件と排水終了判定時間２０４とが両方成立した場合にのみ排水終了を判定手段１０２が判断する方法でおこなうことでも可能であり、排水終了を正確に判断できる。 Here, the drainage end determination time 204 is set as a fixed value in advance and is determined in consideration of the drainage channel length. However, the timer means 106 measures the time of air biting (c), and drainage ends after a certain period of time has elapsed. It is also possible to determine the end of drainage accurately by performing the method in which the determination means 102 determines the end of drainage only when both the condition for shifting to the drainage end current 202 in (d) and the drainage end determination time 204 are satisfied. it can.

また、商用電源１００の電圧変動により単相誘導モータ１０４の回転数やトルクに差が発生するが、タイマー手段１０６の判定時間については、電圧変動による動作時間範囲を考慮して排水終了判定時間２０４やエア噛み（ｃ）時間を確定することで同様の性能を維持できる。 Further, although the rotational speed and torque of the single-phase induction motor 104 are different due to the voltage fluctuation of the commercial power supply 100, the determination time of the timer means 106 is the drainage end determination time 204 in consideration of the operation time range due to the voltage fluctuation. And the same performance can be maintained by determining the air biting (c) time.

（実施の形態２）
図４は、本発明の実施の形態２の食器洗い機１０Ｂのブロック構成図である。図４において、判定手段１０２ｂは、排水状態でエア噛み（ｃ）動作終了後に電流検知手段１０３の電流値が一定値以下に移行した際にその値を記録する第一記録手段１０７とその後、単相誘導モータ１０４を停止後に再度動作した際の電流検知手段１０３が検知した電流値を記録する第二記録手段１０８とから構成される。その他の構成は実施の形態１の食器洗い機と同じであるため省略する。 (Embodiment 2)
FIG. 4 is a block configuration diagram of the dishwasher 10B according to the second embodiment of the present invention. In FIG. 4, the determination unit 102b includes a first recording unit 107 that records a value when the current value of the current detection unit 103 shifts to a predetermined value or less after the end of the air biting (c) operation in the drained state, and thereafter a single recording unit 107. The second recording means 108 records the current value detected by the current detection means 103 when the phase induction motor 104 is operated again after being stopped. Since the other structure is the same as that of the dishwasher of Embodiment 1, it abbreviate | omits.

図５は、排水動作時の単相誘導モータ１０４に流れる電流値の時間変化を示したグラフである。排水開始時に単相誘導モータ１０４の始動（ａ）、正常な排水動作（ｂ）、排水終了間際でのエア噛み動作（ｃ）、第一排水終了動作（ｅ）、停止後の第二排水終了動作（ｆ）の各期間における電流検知手段１０３が検知する電流値が、排水電流２００、エア噛み電流２０１、第一排水終了電流２０２ａ、第二排水終了電流２０２ｂを示しており、排水電流２００とエア噛み電流２０１との差が第一電流差２０５、排水電流２００と排水終了電流２０２との差が第二電流差２０３を示している。 FIG. 5 is a graph showing a change over time in the value of the current flowing through the single-phase induction motor 104 during the draining operation. Start of single phase induction motor 104 at the start of drainage (a), normal drainage operation (b), air biting operation just before the end of drainage (c), first drainage end operation (e), end of second drainage after stop The current values detected by the current detection means 103 in each period of the operation (f) indicate the drainage current 200, the air biting current 201, the first drainage end current 202a, and the second drainage end current 202b. The difference from the air biting current 201 indicates the first current difference 205, and the difference between the drainage current 200 and the drainage end current 202 indicates the second current difference 203.

また、エア噛み動作（ｃ）から第一排水終了動作（ｅ）に移行し、一定時間継続して排水電流２０２ａが継続する時間を第一排水時間２０４ａ、再動作後の第二排水電流２０２ｂが一定時間継続する第一排水時間２０４ｂを示している。 Moreover, it transfers from the air biting operation (c) to the first drainage end operation (e), and the drainage current 202a continues for a certain period of time for the first drainage time 204a, and the second drainage current 202b after the restart is The first drainage time 204b that continues for a certain time is shown.

次に、本実施の形態２の食器洗い機の動作について説明する。図６は排水検知のフローチャートを示す。 Next, operation | movement of the dishwasher of this Embodiment 2 is demonstrated. FIG. 6 shows a flowchart of drainage detection.

まず、図４の食器洗い機本体１０Ｂは、制御手段１０１が単相誘導モータ１０４に対して洗浄または排水をおこなう場合に商用電源１００の電圧を印加する。停止する際は、制
御手段１０１が単相誘導モータ１０４に対して商用電源１００の電圧印加を停止する。洗浄時と排水時は制御手段１０１が単相誘導モータ１０４への印加電圧を切換えて制御をおこない、電圧は商用電源１００をそのまま印加する。 First, the dishwasher body 10 </ b> B in FIG. 4 applies the voltage of the commercial power supply 100 when the control unit 101 performs cleaning or drainage on the single-phase induction motor 104. When stopping, the control means 101 stops the voltage application of the commercial power supply 100 to the single-phase induction motor 104. At the time of washing and draining, the control means 101 performs control by switching the voltage applied to the single-phase induction motor 104, and the commercial power source 100 is applied as the voltage.

排水時（フローチャートＳ１）に印加された電圧により単相誘導モータ１０４は回転し（フローチャートＳ２）、その回転軸に接続された洗浄排水ポンプ１０５は、排水をおこなう。正常な排水時には電流検知手段１０３の電流値が一定電流となる排水電流２００として流れ安定している。排水終了間際では、一旦洗浄排水ポンプ１０５が給水に気泡が混じり、エア噛み状態となることで電流検知手段１０３の電流値がエア噛み電流２０１に電流差２０５だけ低下し、低下しながら一定幅で変動する（フローチャートＳ３）。その状態が一定時間継続時（ｃ）後、給水が無くなり第一排水終了（ｅ）となり、その時の電流検知手段１０３の電流値が第一排水終了電流２０２ａ（フローチャートＳ４）となり、第一記録手段１０７に記録される（フローチャートＳ１１）。 The single-phase induction motor 104 is rotated by the voltage applied during drainage (flowchart S1) (flowchart S2), and the washing drain pump 105 connected to the rotating shaft drains. During normal drainage, the current value of the current detection means 103 flows as a drainage current 200 where the current value is constant and is stable. Just before the end of drainage, once the cleaning / drainage pump 105 is mixed with bubbles in the water supply and enters the air-engaged state, the current value of the current detection means 103 is reduced to the air-engagement current 201 by a current difference 205, with a constant width while decreasing. It fluctuates (flow chart S3). When the state continues for a certain time (c), the supply of water disappears and the first drainage end (e) is reached, and the current value of the current detection means 103 at that time becomes the first drainage end current 202a (flowchart S4). 107 (flow chart S11).

次に一旦、制御手段１０１は、判定手段１０２ｂの第一記録手段１０７に排水終了電流２０２ａが一定時間２０４ａ保持された段階で排水動作を停止するように単相誘導モータ１０４へ停止指令をおこない、停止する（フローチャートＳ１２）。 Next, the control means 101 once issues a stop command to the single-phase induction motor 104 so as to stop the drainage operation when the drainage end current 202a is held in the first recording means 107 of the determination means 102b for a certain time 204a. Stop (flow chart S12).

一定時間停止後に制御手段１０１は、再度単相誘導モータ１０４に電圧を印加し、排水を開始し（フローチャートＳ１２）、その時の電流検知手段１０３の電流値が第二排水終了電流２０２ｂとなり第二記録手段１０８に記録される（フローチャートＳ１３）。 After stopping for a certain period of time, the control means 101 applies voltage to the single-phase induction motor 104 again to start drainage (flow chart S12), and the current value of the current detection means 103 at that time becomes the second drainage end current 202b and the second recording. It is recorded in the means 108 (flow chart S13).

次に判定手段１０２ｂは、第一記録手段１０７の第一排水終了電流２０２ａと第二記録手段１０８の第二排水終了電流２０２ｂを比較し（フローチャートＳ１４）、一定以内の差であれば排水終了と判断し、制御手段１０１に判定結果を通知し、制御手段１０１が単相誘導モータ１０４へ停止指令をおこない、停止する。また、一定以上の差である場合には、排水が終了していないと判断して、ポンプ停止動作と第二排水終了動作（ｆ）と同じ動作を繰り返しおこない、電流値の比較をおこない、一定以内の電流差となるまで繰り返す（フローチャートＳ６）。 Next, the determination unit 102b compares the first drainage end current 202a of the first recording unit 107 with the second drainage end current 202b of the second recording unit 108 (flow chart S14). The control unit 101 notifies the control unit 101 of the determination result, the control unit 101 issues a stop command to the single-phase induction motor 104, and stops. If the difference is greater than a certain value, it is determined that the drainage has not ended, the pump stop operation and the second drain end operation (f) are repeated, the current values are compared, and the constant value is maintained. Is repeated until the current difference is within (flowchart S6).

ここでは、第二終了動作（ｆ）を繰り返しておこなうこととしているが、第二終了動作時間２０４ｂの判定時間を延長し、電流値が一定以内の差になるまで継続する方法でおこなうことでも正確に排水終了を判定できる。 Here, it is assumed that the second end operation (f) is repeated, but it is also accurate to extend the determination time of the second end operation time 204b and continue until the current value becomes within a certain difference. The end of drainage can be determined.

このような動作をすることで、第一排水終了動作（ｅ）での判定時間を短くし、停止後の第二排水動作（ｆ）でも同じ電流値であることを確認することで排水が正確に終了していることを短時間におこなうことができる。第一排水終了動作の判定時間のみでは一定時間安定するまでは保持する必要があるが、ポンプ停止をおこない再度排水動作をしたことによって動作状態が同じであれば、第一排水終了動作時間を短く判定することができる上に、誤判定を防止できる。 By performing such an operation, it is possible to shorten the determination time in the first drainage end operation (e), and to confirm that the second drainage operation (f) after the stop has the same current value. Can be completed in a short time. Only the judgment time for the first drainage end operation needs to be held until it stabilizes for a certain period of time, but if the operation state is the same by stopping the pump and performing the drainage operation again, shorten the first drainage end operation time. In addition to being able to make a determination, an erroneous determination can be prevented.

なお、本実施の形態１および２で説明した手段は、ＣＰＵ（またはマイコン）、ＲＡＭ、ＲＯＭ、記憶・記録装置、Ｉ／Ｏなどを備えた電気・情報機器、コンピュータ、サーバー等のハードリソースを協働させるプログラムの形態で実施してもよい。プログラムの形態であれば、磁気メディアや光メディアなどの記録媒体に記録したりインターネットなどの通信回線を用いて配信することで新しい機能の配布・更新やそのインストール作業が簡単にできる。 Note that the means described in the first and second embodiments use hardware resources such as a CPU (or microcomputer), a RAM, a ROM, a storage / recording device, an electrical / information device including an I / O, a computer, a server, and the like. You may implement in the form of the program made to cooperate. In the form of a program, new functions can be easily distributed / updated and installed by recording them on a recording medium such as magnetic media or optical media or distributing them via a communication line such as the Internet.

本発明にかかる食器洗い機は、排水時に水位検知のみや動作時間のみで排水時間を決め
ている場合のような誤検知や無駄時間動作を防止することができ、正確、迅速に排水終了を判定することで低消費電力化や時間短縮をおこなうことができ、ビルトイン式のフロントおよびスライド式、卓上式の食器洗い機に有用である。 The dishwasher according to the present invention can prevent erroneous detection and dead time operation when drainage time is determined only by water level detection or operation time at the time of drainage, and accurately and quickly determines the end of drainage. This makes it possible to reduce power consumption and time, and is useful for built-in front and slide type and tabletop dishwashers.

３表示部
３ａ操作ボタン
３ｂ表示器
１０Ａ、１０Ｂ食器洗い機
１２モータ
１２ａ位置センサ
１４フィルタ
１５整流回路
１６電圧可変回路
１７インバータ回路
１７ａ駆動回路
１８補助電源
１９制御回路
２３、１００商用電源
２４給水弁
２５ヒータ
２６ファンモータ
２７水位センサ
２８温度センサ
１０１制御手段
１０２、１０２ｂ判定手段
１０３電流検知手段
１０４単相誘導モータ
１０５洗浄排水ポンプ
１０６タイマー手段
１０７第一記録手段
１０８第二記録手段
１０９コンデンサ DESCRIPTION OF SYMBOLS 3 Display part 3a Operation button 3b Display 10A, 10B Dishwasher 12 Motor 12a Position sensor 14 Filter 15 Rectifier circuit 16 Voltage variable circuit 17 Inverter circuit 17a Drive circuit 18 Auxiliary power supply 19 Control circuit 23, 100 Commercial power supply 24 Water supply valve 25 Heater 26 Fan motor 27 Water level sensor 28 Temperature sensor 101 Control means 102, 102b Determination means 103 Current detection means 104 Single phase induction motor 105 Washing drain pump 106 Timer means 107 First recording means 108 Second recording means 109 Capacitor

Claims

食器を収納する洗浄槽と、前記洗浄槽内に水を吐出供給するポンプと、前記ポンプを駆動する単相誘導モータと、前記単相誘導モータに流れる電流を検知する電流検知手段と、前記単相誘導モータに商用電源電圧をコンデンサ始動として印加駆動をおこなう制御手段と、前記電流検知手段の電流が一定値以下に移行した後に一定時間を計測するタイマー手段と、前記電流検知手段の電流値と前記タイマー手段から排水動作状態を判断する判定手段とを備え、前記判定手段が電流検出手段の電流値が一定値以下を一定時間継続した場合に排水終了と判断する食器洗い機。 A washing tank for storing tableware, a pump for discharging water into the washing tank, a single phase induction motor for driving the pump, a current detection means for detecting a current flowing through the single phase induction motor, and the single unit. Control means for applying and driving a commercial power supply voltage to the phase induction motor as a capacitor start, timer means for measuring a fixed time after the current of the current detection means has shifted to a predetermined value or less, and a current value of the current detection means A dishwasher comprising: a determination unit configured to determine a drainage operation state from the timer unit, wherein the determination unit determines that the drainage is finished when the current value of the current detection unit continues for a certain period of time or less.

食器を収納する洗浄槽と、前記洗浄槽内に水を吐出供給するポンプと、前記ポンプを駆動する単相誘導モータと、前記単相誘導モータに流れる電流を検知する電流検知手段と、前記単相誘導モータに商用電源電圧をコンデンサ始動として印加駆動をおこなう制御手段と、前記電流検知手段の電流値が一定値以下に移行した値を記録する第一記録手段と、その後制御手段が前記単相誘導モータを動作停止し、一定時間経過後に動作再開後の前記電流検知手段の電流値を記録する第二記録手段と、前記第一記録手段および第二記録手段の電流値とから排水動作状態を判断する判定手段とを備え、前記判定手段が前記第一記録手段の電流値と第二記録手段の電流値とが同じ場合に、排水終了と判断する食器洗い機。 A washing tank for storing tableware, a pump for discharging water into the washing tank, a single-phase induction motor for driving the pump, current detection means for detecting a current flowing through the single-phase induction motor, and the single unit Control means for applying and driving a commercial power supply voltage to the phase induction motor as a capacitor start, first recording means for recording a value when the current value of the current detection means has shifted to a predetermined value or less, and then the control means is the single phase The operation of the drainage is determined from the second recording means for recording the current value of the current detecting means after the operation of the induction motor is stopped after a certain time has elapsed, and the current values of the first recording means and the second recording means. A dishwasher comprising: a determining unit configured to determine that drainage is terminated when the current value of the first recording unit and the current value of the second recording unit are the same.

前記判定手段は、前記電流検知手段の電流値が一定値以下に移行した後に、前記単相誘導モータの動作停止および動作開始を複数回繰り返し、複数回の前記第一記録手段の電流値と第二記録手段の電流値を比較し、継続して電流値に変化がない場合、排水終了と判断する請求項２記載の食器洗い機。 The determination means repeats the operation stop and operation start of the single-phase induction motor a plurality of times after the current value of the current detection means shifts to a predetermined value or less, and a plurality of times the current value of the first recording means 3. The dishwasher according to claim 2, wherein the current values of the two recording means are compared, and if the current value does not change continuously, it is determined that the drainage is finished.

前記電流検知手段が、前記単相誘導モータの印加電圧と電流値から算出される電力検知手段とした請求項１乃至３記載のいずれかの食器洗い機。 The dishwasher according to any one of claims 1 to 3, wherein the current detection means is power detection means calculated from an applied voltage and a current value of the single-phase induction motor.

請求項１から４いずれか１項記載の家電機器の少なくとも一部をコンピュータに実行させるためのプログラム。 The program for making a computer perform at least one part of the household appliances of any one of Claim 1 to 4.