JPH01107796A - System for controlling water stream in washer - Google Patents

System for controlling water stream in washer

Info

Publication number
JPH01107796A
JPH01107796A JP62264947A JP26494787A JPH01107796A JP H01107796 A JPH01107796 A JP H01107796A JP 62264947 A JP62264947 A JP 62264947A JP 26494787 A JP26494787 A JP 26494787A JP H01107796 A JPH01107796 A JP H01107796A
Authority
JP
Japan
Prior art keywords
washing machine
data
water flow
power source
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62264947A
Other languages
Japanese (ja)
Inventor
Kazuhiko Kiyabu
木薮 和彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu General Ltd
Original Assignee
Fujitsu General Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu General Ltd filed Critical Fujitsu General Ltd
Priority to JP62264947A priority Critical patent/JPH01107796A/en
Publication of JPH01107796A publication Critical patent/JPH01107796A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To require only one thyristor, to make usable an inexpensive motor- driven machine and to reduce the cost in washing by obtaining a prescribed on/off time of the thyristor based on data with 0-360 degrees in an AC power source as a unit. CONSTITUTION: Varius kinds of data corresponding to the strength of a water stream are previously stored in ROM 8 and the data are constituted of one wave length of 0-360 degrees in the voltage waveform of the AC power source 2 as a unit. When the water stream is set to be strong, a controller 7 reads data by which a level is made to be the 'H' level during the two wave lengths in the voltage waveform of the AC power source and data by which the 'L' level is adopted during the succeeding two lengths from ROM 8 by the timing of a synchronizing signal which is outputted from a zero-cross detecting circuit 6 and outputs a rectangular wave signal based on the data. Then, the thyristor 5a of a photo-thyristor 5 is turned on only in case of the 'H' level in the signal so that the AC power source of the voltage waveform is impressed on the motor-driven machine 4 for the washing machine and also the number of rotation in the motor-driven machine 4 is controlled by the AC power source.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は洗濯機の水流の強弱を制御する水流制御方式
に係り、更に詳しくは洗濯機を廉価とするようにした洗
濯機の水流制御方式に関するものである。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a water flow control method for controlling the strength of water flow in a washing machine, and more specifically to a water flow control method for a washing machine that makes the washing machine inexpensive. It is related to.

[従 来 例] 従来、この種の水流制御方式は、例えば第4図に示すよ
うに制御回路(マイクロコンピュータ)1からの制御信
号にてフォトサイリスタA、BがON、OFFされ、そ
のフォトサイリスタA、BのON、OFFにて交流電源
(商用)2を洗濯機用電動機3に印加し、その洗濯機用
電動機3の回転数を制御して水流を強弱に制御している
[Conventional Example] Conventionally, in this type of water flow control method, photothyristors A and B are turned on and off by a control signal from a control circuit (microcomputer) 1, as shown in FIG. AC power (commercial) 2 is applied to the washing machine electric motor 3 by turning on and off A and B, and the rotation speed of the washing machine electric motor 3 is controlled to control the strength of the water flow.

このフォトサイリスタA、HのON、OFFは。What is the ON/OFF status of these photothyristors A and H?

ゲートに入力される制御信号の“′H″レベル、“L”
レベルにて動作する。ここで、制御回路1から同図(a
)、 (b)に示す制御信号が出方された場合、その制
御信号の11 HI+レベル時にそれぞれのフォトサイ
リスタA、BがONされ、そのII HIIレベルの長
い期間洗濯機用電動機3には交流電源2が印加されるた
め、洗濯機用電動機3の回転数が高くなって当該洗濯機
の水流を強とする。一方。
"'H" level, "L" of the control signal input to the gate
Operates at level. Here, from the control circuit 1,
), (b), when the control signal is at 11HI+ level, each photothyristor A and B is turned on, and for a long period of time at IIHII level, AC is applied to the washing machine motor 3. Since the power source 2 is applied, the rotational speed of the washing machine electric motor 3 increases and the water flow of the washing machine becomes strong. on the other hand.

同図(d)、 (e)に示す制御信号が出力された場合
、そのIt H1ルベルの短い期間洗濯機用電動機3に
は交流電源2が印加されるため、洗濯機用電動機3の回
転数が低くなって当該洗濯機の水流を弱とする。また、
上記制御信号は2種類あり、同図から明らかなように“
H”レベルが交互に出力されているため、洗濯機用電動
機3は正・逆転されるようになっている。この正・逆転
により洗濯機の水流の流れも正・逆方向に切り換えられ
る。
When the control signals shown in (d) and (e) of the figure are output, the AC power supply 2 is applied to the washing machine motor 3 for a short period of It H1 level, so the rotation speed of the washing machine motor 3 increases. becomes low and the water flow of the washing machine becomes weak. Also,
There are two types of control signals mentioned above, and as is clear from the figure, “
Since the "H" level is outputted alternately, the washing machine electric motor 3 is configured to be rotated in forward and reverse directions.By this forward and reverse rotation, the flow of water in the washing machine is also switched between forward and reverse directions.

[発明が解決しようとする問題点] ところで、上記水流制御方式にあっては、正・逆回転の
ため巻線等が異なった洗濯機用電動機3を用い、しかも
その制御のために2個のフォトサイリスタA、Bを用い
なければならず、その分洗濯機のコストが高くならざる
を得なかった。また、制御回路1から出力される制御信
号が交流電源2の周波数と非同期であるため、洗濯機用
電動機3に印加される交流電源波形が崩れたものとなる
[Problems to be Solved by the Invention] By the way, in the water flow control method described above, a washing machine electric motor 3 with different windings etc. for forward and reverse rotation is used, and two electric motors are used for the control. Photothyristors A and B had to be used, which inevitably increased the cost of the washing machine. Furthermore, since the control signal output from the control circuit 1 is asynchronous with the frequency of the AC power source 2, the AC power waveform applied to the washing machine motor 3 becomes distorted.

したがって、その制御信号の“H,”レベル期間が長い
場合(水流を強にした場合)にはそれほど間層とならな
いが、短い場合(水流を弱にした場合)には洗濯機用電
動機3′の回転制御にムラを生じ、安定した水流を得る
ことができなくなることもあった。
Therefore, if the "H," level period of the control signal is long (when the water flow is made strong), there will not be much interference, but if it is short (when the water flow is made weak), the washing machine electric motor 3' In some cases, rotation control became uneven, making it impossible to obtain a stable water flow.

この発明は上記問題点に鑑みなされたものであり、その
目的は洗濯機のコストを低下させることができ、しかも
安定した水流を得ることができる洗濯機の水流制御方式
を提供することにある。
This invention was made in view of the above problems, and its purpose is to provide a water flow control system for a washing machine that can reduce the cost of the washing machine and also provide a stable water flow.

[問題点を解決するための手段] 上記目的を達成するために、この発明は洗濯機用電動機
にフォトサイリスタを介して交流電源を印加し、このフ
ォトサイリスタを所定時間ON。
[Means for Solving the Problems] In order to achieve the above object, the present invention applies AC power to a washing machine motor through a photothyristor, and turns on the photothyristor for a predetermined period of time.

OFFすることにより洗濯機用電動機の回転数を制御し
、水流の強弱を得る洗濯機の水流制御方式であって、上
記洗濯機用電動機の回転数に対応し、交流電源の電圧波
形で0から360度の1波長を単位としたデータを予め
メモリに記憶しておき、そ゛の交流電源に同期した信号
のタイミングで上記メモリに記憶されたデータのうち洗
濯機用電動機の回転数に応じたデータを読み出し、この
データに基づいて上記フォトサイリスタを所定時間ON
This is a water flow control method for washing machines that controls the rotation speed of the washing machine electric motor by turning it off and obtains the strength or weakness of the water flow. Data in units of one wavelength of 360 degrees is stored in memory in advance, and data corresponding to the rotation speed of the washing machine motor is stored in the memory at the timing of a signal synchronized with the AC power supply. is read out and the photothyristor is turned on for a predetermined period of time based on this data.
.

OF F L、このフォトサイリスタの08時に洗濯機
用電動機を一方向に回転制御し、水流を強弱に制御する
ようにしたものである。
OF F L, this photothyristor controls the rotation of the electric motor for the washing machine in one direction at 08 o'clock, and controls the strength of the water flow.

[実 施 例] 以下、この発明の実施例を第1図に基づいて説明する。[Example] Hereinafter, an embodiment of the present invention will be described based on FIG. 1.

なお、図中、第3図と同一部分には同一符号を付し重複
説明を省略する。
In addition, in the figure, the same parts as in FIG. 3 are given the same reference numerals, and redundant explanation will be omitted.

図において、交流電源2は洗濯機用電動機4およびこの
洗濯機用電動機4と直列に接続されたフォトサイリスタ
5に印加されると共に、その交流電源の電圧波形のゼロ
クロスを検出するゼロクロス検出回路6に入力されてい
る。なお、洗濯機用電動機4は一方向にしか回転しない
ため、従来の洗濯機用電動機3(第3図に示す)に比べ
て安価なものになっている。上記ゼロクロス検出回路6
には、交流電源2の電圧波形のうち正側部分を取り出す
ためのフォトカプラ6a、その電圧波形の負側部分を取
り出すためのフォトカプラ6b、それらフォトカプラ6
a、6bにて得られた信号との論理をとる2ナンド(N
AND)回路6cからなっている。この場合、フォトカ
プラ6a、6bがフォトダイオードとnpn型トランジ
スタからなっているため、フォトカプラ6a、6bの出
力が同時に交流電源2の電圧波形のゼロ付近で所定時間
同時に“H”レベルとなる。したがって、2ナンド回路
6cからは交流電源2の電圧波形のゼロクロス点にて′
L”レベルとなるパルス信号(交流電源2に同期した信
号)が出力される。制御装置7には洗濯機の水流を強弱
に制御するためのデータが記憶されたメモリとしてのR
OMgが備えられ、この制御装置7は当該洗濯機で設定
された水流とするデータを上記同期信号のタイミングに
て上記ROM8から読み出し、このデータに基づいてサ
イリスク5aを所定時間ON、OFFとする制御信号を
出力するようになっている。この制御信号は、サイリス
タ5aをONとする場合1gH”レベルで。
In the figure, an AC power source 2 is applied to a washing machine motor 4 and a photothyristor 5 connected in series with the washing machine motor 4, and is also applied to a zero cross detection circuit 6 that detects zero crosses of the voltage waveform of the AC power source. It has been entered. Incidentally, since the washing machine electric motor 4 rotates in only one direction, it is cheaper than the conventional washing machine electric motor 3 (shown in FIG. 3). The above zero cross detection circuit 6
includes a photocoupler 6a for taking out the positive side part of the voltage waveform of the AC power supply 2, a photocoupler 6b for taking out the negative side part of the voltage waveform, and these photocouplers 6.
2 NAND (N
AND) circuit 6c. In this case, since the photocouplers 6a and 6b are composed of a photodiode and an npn type transistor, the outputs of the photocouplers 6a and 6b simultaneously become "H" level near zero of the voltage waveform of the AC power supply 2 for a predetermined period of time. Therefore, from the 2 NAND circuit 6c, '
A pulse signal (a signal synchronized with the AC power supply 2) that becomes L" level is output. The control device 7 has an R memory that stores data for controlling the strength and weakness of the water flow of the washing machine.
An OMg is provided, and this control device 7 reads data for the water flow set in the washing machine from the ROM 8 at the timing of the synchronization signal, and controls to turn the Cyrisk 5a ON and OFF for a predetermined period of time based on this data. It is designed to output a signal. This control signal is at 1gH'' level when turning on the thyristor 5a.

OFFとする場合1′L Itレベルになっている。そ
のため、フォトダイオード5bにはその(IH”レベル
信号にてサイリスタ5aをONとするに必要な光エネル
ギを放射する電流が流されるようになっている。
When it is turned off, it is at the 1'L It level. Therefore, a current is caused to flow through the photodiode 5b to radiate the optical energy necessary to turn on the thyristor 5a with the (IH'' level signal).

次に、上記水流制御回路に適用される洗濯機の水流制御
方式の作用を第2図のタイムチャートに基づいて説明す
る。
Next, the operation of the washing machine water flow control method applied to the water flow control circuit will be explained based on the time chart of FIG. 2.

まず、予めROM8には、水流の強弱に応じた種°々の
データが記憶されており、これらデータは交流電源2の
電圧波形のOから360度の1波長を単位として構成さ
れている。
First, various data corresponding to the strength of the water flow are stored in advance in the ROM 8, and these data are configured in units of one wavelength of 360 degrees from O of the voltage waveform of the AC power source 2.

ここで、洗濯機の水流が強となるように設定された場合
、制御装置7はゼロクロス検出回路6から出力された同
期信号(同図(b)に示す)のタイミングにてROM8
から交流電源の電圧波形2波長の間“H″レベル次の2
波長の間“L”レベルとするデータを読み出し、そのデ
ータに基づいて同図(c)に示す矩形波信号を出力する
。すると、フォトサイリスタ5のサイリスタ5aがその
信号の14 HI+レベル時のみONされるため、洗濯
機用電動機4には同図(d)に示す電圧波形の交流電源
が印加され、その交流電源により洗濯機用電動機4の回
転数が制御される6 また、洗濯機の水流が中となるように設定された゛場合
、制御装置7は上記同様に、同期信号(同図(b)に示
す)のタイミングにてROM8から交流の電圧波形1波
長の間nH″ルベル、次の1波長の間“L”レベルとす
るデータを読み出し、そのデータに基づいて同図(e)
に示す矩形波信号を出力する。すると、フォトサイリス
タ5のサイリスタ5aがその信号の“H”レベル時のみ
ONされるため、洗濯機用電動機3には同ri!I(f
)に示す電圧波形の交流電源が印加され、その交流電源
により洗濯機用電動機4の回転数が制御される。
Here, when the water flow of the washing machine is set to be strong, the control device 7 controls the ROM 8 at the timing of the synchronization signal output from the zero-cross detection circuit 6 (shown in FIG.
The “H” level between two wavelengths of the voltage waveform of the AC power source and the next two
Data that is set to the "L" level during the wavelength is read out, and a rectangular wave signal shown in FIG. 2(c) is output based on the data. Then, since the thyristor 5a of the photothyristor 5 is turned on only when the signal is at the 14 HI+ level, an AC power source with a voltage waveform shown in FIG. The rotation speed of the machine electric motor 4 is controlled6. Furthermore, when the water flow of the washing machine is set to be medium, the control device 7 controls the timing of the synchronization signal (shown in (b) of the same figure) as described above. At ROM 8, the AC voltage waveform is set to nH'' level during one wavelength and to L level during the next wavelength.
Outputs the rectangular wave signal shown in . Then, since the thyristor 5a of the photothyristor 5 is turned on only when the signal is at "H" level, the washing machine motor 3 has the same ri! I(f
) is applied, and the rotation speed of the washing machine motor 4 is controlled by the AC power.

また、洗濯機の水流が弱となるように設定された場合、
制御装置7は上記同様に、同期信号(同図(b)に示す
)のタイミングにてROM8から交流の電圧波形1波長
の間aH″ルベル、次の2波長の間“L I+レベルと
するデータを読み出し、そのデータに基づいて同図(g
)に示す矩形波信号を出力する。すると、フォトサイリ
スタ5のサイリスタ5aがその信号のtgH”レベル時
のみONされるため、洗濯機用電動機3には同図(h)
に示す電圧波形の交流電源が印加され、その交流電源に
より洗濯機用電動機4の回転数が制御される。
Also, if the washing machine is set to have a weak water flow,
Similarly to the above, the control device 7 inputs data from the ROM 8 at the timing of the synchronization signal (shown in FIG. 2(b)) to set the AC voltage waveform to aH'' level for one wavelength and to set the L I+ level for the next two wavelengths. The same figure (g) is read based on that data.
) Outputs the rectangular wave signal shown in (). Then, since the thyristor 5a of the photothyristor 5 is turned ON only when the signal is at the tgH'' level, the washing machine motor 3 is
An AC power source having a voltage waveform shown in is applied, and the rotation speed of the washing machine motor 4 is controlled by the AC power source.

このように、洗濯機用電動機3に印加される交流電源を
同図(d)、 (f)、 (h)と変えることにより、
その洗濯機用電動機3の回転数が変わり、水流の速さを
強、中、弱の何れにも制御することができる。
In this way, by changing the AC power applied to the washing machine motor 3 as shown in (d), (f), and (h) in the same figure,
The rotation speed of the electric motor 3 for the washing machine is changed, and the speed of the water flow can be controlled to be strong, medium, or weak.

また、洗濯機用電動機3に印加される交流電源の電圧は
上記実施例に限ることなく、ROM8に11 HlPレ
ベル、11 L ′7レベルを種々に組合せたデータを
記憶しておくことにより、洗濯機用電動機3の回転を種
々に制御し、衣服等の汚れを最も取ることのできる水流
の速さに種々変えることができる。
Furthermore, the voltage of the AC power supply applied to the washing machine motor 3 is not limited to that in the above embodiment, and by storing data in various combinations of the 11 HlP level and the 11 L'7 level in the ROM 8, the voltage of the AC power supply applied to the washing machine motor 3 can be changed to By controlling the rotation of the machine electric motor 3 in various ways, the speed of the water flow can be varied to best remove stains from clothes, etc.

[発明の効果] 以上説明したように、この発明によれば、一方向に回転
する洗濯機用電動機に印加する交流電源の電圧波形のゼ
ロクロスを検出してその交流電源に同期した信号を得、
この同期信号のタイミングにてその交流電源を洗濯機用
電動機に印加するサイリスタを所定時間ON、OFFす
ると共に、そのサイリスタのON、OFF所定時間を交
流電源の0から360度を単位としたデータに基づいて
得るようにしたので、サイリスタが一個で済み、しかも
安価な電動機を利用することができるため、洗濯機のコ
ストを低下させることができる。またこの発明によれば
、サイリスタのON、OFF制御が交流電源に同期して
なされるために、洗濯機用電動機に印加される交流電源
の位相がゼロスタートになり、その印加交流電源の電圧
波形が歪まず、洗濯機の水流を弱に制御する場合であっ
ても洗濯機用電動機を正確に回転させられ、安定な水流
とすることができ、さらにサイリスタのスイッチング時
にノイズの発生もなく、シかも洗濯機用電動機における
電磁音等の発生を防止することができるという効果もあ
る。
[Effects of the Invention] As explained above, according to the present invention, a signal synchronized with the AC power source is obtained by detecting the zero crossing of the voltage waveform of the AC power source applied to the motor for a washing machine rotating in one direction.
At the timing of this synchronization signal, the thyristor that applies the AC power to the washing machine motor is turned on and off for a predetermined period of time, and the predetermined ON and OFF times of the thyristor are converted into data in units of 360 degrees from 0 of the AC power source. Since the washing machine is obtained based on the washing machine, only one thyristor is required and an inexpensive electric motor can be used, thereby reducing the cost of the washing machine. Further, according to the present invention, since the ON/OFF control of the thyristor is performed in synchronization with the AC power supply, the phase of the AC power supply applied to the washing machine motor becomes zero start, and the voltage waveform of the applied AC power supply is Even when the washing machine's water flow is controlled weakly, the washing machine motor can be rotated accurately and the water flow can be stable.Furthermore, there is no noise when switching the thyristor, and the system is It also has the effect of preventing electromagnetic noise from occurring in the washing machine motor.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例を示し、洗濯機の水流制御
方式が適用された水流制御回路の回路ブロック図、第2
図は上記洗濯機の水流制御方式を説明するための水流制
御回路の動作タイムチャート図、第3図は従来の洗濯機
の水流制御方式を説明するための水流制御回路の回路ブ
ロック図、第4図は第3図の水流制御回路の動作タイム
チャート図である。 図中、1は制御回路(CPU)、2は交流電源(商用)
、3は洗濯機用電動機(正・逆回転用)、4は洗濯機用
電動機(一方向回転用)、5はフォトサイリスタ、5a
はフォトダイオード、5bはサイリスタ、6はゼロクロ
ス検出回路、6a、6bはフォトカブラ、6cは2ナン
ド(NAND)回路、7は制御装置(CPU)、8はR
OM(メモリ)、A、 Bはフォトサイリスタである。 第1図 6、
FIG. 1 shows an embodiment of the present invention, and shows a circuit block diagram of a water flow control circuit to which a washing machine water flow control method is applied.
The figure is an operation time chart of the water flow control circuit for explaining the water flow control method of the washing machine, FIG. 3 is a circuit block diagram of the water flow control circuit for explaining the water flow control method of the conventional washing machine, and FIG. The figure is an operation time chart of the water flow control circuit of FIG. 3. In the figure, 1 is the control circuit (CPU), 2 is the AC power supply (commercial)
, 3 is a washing machine electric motor (for forward/reverse rotation), 4 is a washing machine electric motor (for one-way rotation), 5 is a photothyristor, 5a
is a photodiode, 5b is a thyristor, 6 is a zero-cross detection circuit, 6a and 6b are photo couplers, 6c is a 2 NAND (NAND) circuit, 7 is a control device (CPU), 8 is R
OM (memory), A, and B are photothyristors. Figure 1 6,

Claims (2)

【特許請求の範囲】[Claims] (1)洗濯機用電動機にフォトサイリスタを介して交流
電源を印加し、該フォトサイリスタを所定時間ON、O
FFすることにより前記洗濯機用電動機の回転数を制御
し、水流の強弱を得る洗濯機の水流制御方式であって、 前記洗濯機用電動機の回転数に対応し、前記交流電源の
電圧波形で0から360度の1波長を単位としたデータ
を予めメモリに記憶しておき、前記交流電源に同期した
信号のタイミングで前記メモリに記憶されたデータのう
ち前記洗濯機用電動機の回転数に応じたデータを読み出
し、該データに基づいて前記フォトサイリスタを所定時
間ON、OFFし、該フォトサイリスタのON時に前記
洗濯機用電動機を一方向に回転制御し、前記水流を強弱
に制御するようにしたことを特徴とする洗濯機の水流制
御方式。
(1) Apply AC power to the washing machine electric motor via a photothyristor, and turn the photothyristor ON and OFF for a predetermined period of time.
A water flow control method for a washing machine that controls the rotation speed of the washing machine electric motor by FF to obtain the strength or weakness of the water flow, the method comprising Data in units of one wavelength from 0 to 360 degrees is stored in a memory in advance, and at the timing of a signal synchronized with the AC power source, data is stored in the memory in accordance with the rotation speed of the washing machine motor. The photothyristor is turned on and off for a predetermined period of time based on the data, and when the photothyristor is turned on, the washing machine electric motor is controlled to rotate in one direction, and the water flow is controlled to be strong or weak. A washing machine water flow control system characterized by:
(2)特許請求の範囲(1)において、前記同期信号は
前記交流電源の電圧波形のゼロクロス点を検出して得て
いる洗濯機の水流制御方式。
(2) A water flow control method for a washing machine according to claim (1), wherein the synchronization signal is obtained by detecting a zero-crossing point of a voltage waveform of the AC power source.
JP62264947A 1987-10-20 1987-10-20 System for controlling water stream in washer Pending JPH01107796A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62264947A JPH01107796A (en) 1987-10-20 1987-10-20 System for controlling water stream in washer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62264947A JPH01107796A (en) 1987-10-20 1987-10-20 System for controlling water stream in washer

Publications (1)

Publication Number Publication Date
JPH01107796A true JPH01107796A (en) 1989-04-25

Family

ID=17410401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62264947A Pending JPH01107796A (en) 1987-10-20 1987-10-20 System for controlling water stream in washer

Country Status (1)

Country Link
JP (1) JPH01107796A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007217993A (en) * 2006-02-17 2007-08-30 Kaneso Co Ltd Waterproof apparatus
JP2008202339A (en) * 2007-02-21 2008-09-04 Tokyu Construction Co Ltd Structure for catching drifting articles by tsunami
CN111118815A (en) * 2020-01-07 2020-05-08 青岛海尔洗衣机有限公司 Flow control system and washing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007217993A (en) * 2006-02-17 2007-08-30 Kaneso Co Ltd Waterproof apparatus
JP2008202339A (en) * 2007-02-21 2008-09-04 Tokyu Construction Co Ltd Structure for catching drifting articles by tsunami
CN111118815A (en) * 2020-01-07 2020-05-08 青岛海尔洗衣机有限公司 Flow control system and washing machine
CN111118815B (en) * 2020-01-07 2024-03-12 青岛海尔洗衣机有限公司 Flow control system and washing machine

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