JP3499371B2 - Dehydration control device for drum type washing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dewatering control device for a drum type washing machine having a washing and dewatering tub, a part of which is immersed in a washing liquid in a water tub and which is rotatably provided around a horizontal axis. .

[0002]

2. Description of the Related Art Dehydration control of a conventional drum type washing machine having a washing / dehydrating tub is performed as follows, for example. Drain water with the rotation of the washing / dehydrating tub stopped, and after draining is completed, loosen the laundry in the washing / dehydrating tub and control the rotation of the washing / dehydrating tub to the dewatering speed. . At this time, if an imbalance of the laundry in the washing / dehydrating tub occurs and it is impossible to shift to the dehydration rotation speed, the laundry loosening control is restarted and the repetition is repeated several times. If all attempts have failed, the dehydration control itself is stopped or the dehydration control is performed at a lower rotation speed than usual. On the other hand, in a washing machine with a vertical washing / dehydrating tub called a so-called spiral type, the pulsator is repeatedly flipped forward and backward before draining to control the laundry to be uniformly unraveled in the circumferential direction of the washing / dehydrating tub. It is carried out.

[0003]

In the drum type washing machine, since the direction of the rotating shaft is different from that of the vertical type washing machine, the effect of loosening the laundry in the same manner as the vertical washing machine cannot be expected. In addition, since the drum type washing machine has a very large moment of inertia in the washing and dehydrating tub compared to that of the pulsator,
Rapid forward reversal itself like a pulsator is difficult. Therefore, in the conventional drum type washing machine, it takes 1 minute or more to loosen the laundry, which is longer than several seconds in the vertical washing machine. Moreover, there is a high possibility that the startup to the dehydration speed will fail, and the loosening control will be repeated several times. Furthermore, since unraveling control is not performed during drainage, there is a problem that the time required for completion of dehydration becomes long.

The present invention has been made in view of the above,
An object of the present invention is to provide a dehydration control device for a drum-type washing machine, which can easily and surely perform loosening control during dehydration in a short time and shorten the entire dehydration time.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is a washing machine which is rotatably provided around a horizontal axis in a water tub and is partially immersed in a washing liquid in the water tub. A dehydration control device for a drum-type washing machine having a combined dewatering tank, comprising: rotating means for rotating the washing and dewatering tank; rotation speed detecting means for detecting a rotating speed of the washing and dewatering tank; A drainage means for discharging water and a control means for controlling each operation of the rotating means and the drainage means are provided, and when the laundry in the washing / dehydrating tank is dehydrated, the control means causes the drainage by the drainage means. Before the start of the washing, the rotating means is controlled based on the output signal of the rotating speed detecting means, and the washing / washing operation is performed at such a rotation number that the laundry falls at the top of the washing / dehydrating tub. The point is that the dehydration tank is configured to rotate. That. With this configuration, before the drainage starts when the laundry is dehydrated, the laundry washing / dehydrating tank is rotated so that the laundry has a rotation speed such that the laundry sticks to the inner wall of the washing / dehydrating tank. . Compared to when there is no water in the washing / dehydrating tub, the laundry is quickly and reliably attached to the inner wall of the washing / dehydrating tub to loosen the laundry. Especially for loosening control of laundry before the start of drainage,
And the time when the laundry falls at the top of the washing and dehydrating tub.
By rotating the washing and dehydration tub with the number of turns, if there is little water
Laundry is easier to peel off compared to
It also falls down before reaching the top of the dehydration tank, forming a dumpling
The condition is alleviated and evenly adheres to the inner wall of the washing / dehydrating tub for washing.
The rinse is loosened easily and reliably.

[0006]

The invention according to claim 2 is a spin-drying control device for a drum-type washing machine, which has a washing and spin-drying tub that is rotatably provided around a horizontal axis in the tub and is partially immersed in the washing liquid in the tub. There is a rotating means for rotating the washing / dehydrating tub, a rotation speed detecting means for detecting a rotating speed of the washing / dewatering tub, a draining means for discharging water in the water tub, the rotating means and the drainage. A control means for controlling each operation of the means, and when the laundry in the washing / dehydrating tub is dehydrated, the control means is based on the output signal of the rotation speed detection means before the drainage by the drainage means is started. And controlling the rotating means to drop the laundry at the top of the washing / dehydrating tub.
At a rotational speed as to rotate the washing and dewatering tank, also the
The laundry according to a predetermined control condition range for the rotating means
The laundry so that it falls at the top of the washing and dewatering tub.
Once the dewatering tank is in operation,
The gist is that it is configured so that the drainage operation is performed . With this configuration, the drainage operation is started after the completion of the loosening control of the laundry.

According to a third aspect of the present invention, there is provided a dehydration control device for a drum type washing machine having a washing and dehydrating tub which is rotatably provided around a horizontal axis in a water tub and a part of which is immersed in a washing liquid in the water tub. There is a rotating means for rotating the washing / dehydrating tub, a rotation speed detecting means for detecting a rotating speed of the washing / dewatering tub, a draining means for discharging water in the water tub, the rotating means and the drainage. A control means for controlling each operation of the means, and when the laundry in the washing / dehydrating tub is dehydrated, the control means is based on the output signal of the rotation speed detection means before the drainage by the drainage means is started. And controlling the rotating means to drop the laundry at the top of the washing / dehydrating tub.
At a rotational speed as to rotate the washing and dewatering tank, also the
The washing and dewatering tub is not
Rotation speed is set so that it will drop at the top of the washing and dehydrating tub.
In the output state of the rotation control signal of a constant value for
Of the number of rotations of the washing and dewatering tub detected by the number of rotations detection means
After the fluctuation range is within the specified range,
The gist is that it is configured to perform drainage operation . With this configuration, when the laundry is stuck to the inner wall of the washing / dehydrating tub during unraveling control and the unbalance is reduced, fluctuations in the rotation speed of the washing / dehydrating tub are reduced, so the rotating means is controlled by a constant rotation control signal. In this case, it is determined that the loosening control is completed after confirming that the fluctuation range of the number of rotations of the washing / dehydrating tub is within a predetermined range.

According to a fourth aspect of the present invention, there is provided a dehydration control device for a drum type washing machine having a washing and dehydrating tub which is rotatably provided around a horizontal axis in a water tub and is partially immersed in the washing liquid in the water tub. There is a rotating means for rotating the washing / dehydrating tub, a rotation speed detecting means for detecting a rotating speed of the washing / dewatering tub, a draining means for discharging water in the water tub, the rotating means and the drainage. A control means for controlling each operation of the means, and when the laundry in the washing / dehydrating tub is dehydrated, the control means is based on the output signal of the rotation speed detection means before the drainage by the drainage means is started. And controlling the rotating means to drop the laundry at the top of the washing / dehydrating tub.
At a rotational speed as to rotate the washing and dewatering tank, also the
The number of rotations of the washing / dehydrating tub depends on the laundry
In order to keep at a constant number of rotations, such as falling at the top of
The fluctuation range of the rotation control signal for the rotating means of
After it is within the range, drain the water by the draining means.
And summary to become configured as that. With this configuration, when the laundry is stuck to the inner wall of the washing / dehydrating tub during unraveling control and the unbalance is reduced, the load torque fluctuation is reduced, and the rotation of the rotating means for maintaining the washing / dehydrating tub at a constant number of rotations. Since the fluctuation of the control signal becomes small, it is judged that the loosening control is completed by confirming that the fluctuation width of the rotation control signal for controlling the washing / dehydrating tub at a constant rotation speed is within a predetermined range.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. First, the configuration and operation of a dehydration control device for a drum type washing machine will be described with reference to FIG. Reference numeral 2 denotes a water tank. Inside the water tank 2, a drum-shaped washing / dehydrating tank 3 rotatably supported by a horizontal rotating shaft 5 is provided. A washing liquid is stored in the water tub 2 at the time of washing, and a part of the washing / dehydrating tub 3 is immersed in the washing liquid. A motor 6 as a rotating means is attached to the lower side of the water tank 2, and the rotation of the motor 6 is transmitted to the washing / dehydrating tank 3 via a motor pulley 7, a belt 8 and a drum pulley 9.
A rotation sensor 10 as a rotation speed detection unit for detecting the rotation speed of the output shaft is attached to the motor 6, and an output signal from the rotation sensor 10 according to the rotation speed of the motor 6 is a main control circuit as a control unit. It is input to the section 21. Further, a drain valve 13 as a drain means is connected to a drain port provided at the bottom of the water tank 2 via a drain pipe. Motor 6
Each operation of the drain valve 13 is controlled by a control signal from the main control circuit unit 21.

When the laundry in the washing / dehydrating tub 3 is dehydrated, the rotation speed of the motor 6 is controlled based on the output signal of the rotation sensor 10 before the drainage by the drain valve 13 is started.
The laundry washing / dehydrating tub 3 is rotated so that the number of rotations is such that the laundry sticks to the inner wall of the washing / dehydrating tub 3, and loosening control of the laundry is performed. Compared with the case where there is no water in the washing / dehydrating tub 3, the laundry adheres to the inner wall of the washing / dehydrating tub 3 more quickly and surely. Whether the fluctuation range of the rotation speed or the load torque fluctuation when the motor 6 is controlled by a constant rotation control signal has become smaller than a predetermined value, or the fluctuation range of the rotation control signal for controlling the constant rotation speed is a predetermined value. Confirm that it has become smaller than the value of, and judge that the loosening control is completed, and start draining. By performing such dehydration control, it is possible to rise to the dehydration rotation speed without causing an imbalance in the laundry, and it is possible to shorten the time required to start up.

FIG. 2 shows the detailed construction of the drum type washing machine. An outer box 1 has an opening for loading laundry in its front surface, and an opening / closing door 4 is attached to the opening so as to be openable and closable. Inside the outer box 1, the base 11 via the columns
The water tub 2 supported by the above is internally provided, and the washing and dehydrating tub 3 is provided in the water tub 2 as described above. Also the outer box 1
A water supply valve (not shown) connected to a water supply port (not shown) of the water tank 2 is provided at the upper part of the inside, and a drain pipe is provided at the drain port 12 of the water tank 2 at the lower part of the outer box 1. A drainage valve 13 connected through is provided. Although the rotation sensor detects the rotation speed of the motor 6, it may be configured to detect the rotation speed of the washing / dehydrating tub 3. Further, the motor pulley 7, the belt 8 and the drum pulley 9 may be constituted by a reduction mechanism in which gears are replaced, and further, the output shaft of the motor 6 may be directly connected to the rotary shaft 5 of the washing / dehydrating tub 3.

FIG. 3 shows the details of the configuration of the control system. Main control circuit unit 21 including a microcontroller
An output signal of the rotation sensor 10 and a motor control signal are input to the memory, and a memory 24 for sequentially storing a predetermined number of the output signal of the rotation sensor 10 and the motor control signal is connected. Further, the main control circuit section 21 has a display means 2 for displaying a power-on state and an operating state of the drum type washing machine.
5. A key input means 26 including various operation keys for turning on / off the drum type washing machine and inputting information for controlling the operating state is connected. Further, the main control circuit section 21 drives the motor 6 via the motor drive circuit 22 and controls the operations of the drain valve 13, the water supply valve, the hot water heater, etc. via the load drive circuit 23.

Next, the first control method will be described with reference to the flow chart of FIG. 4 and FIGS. Before the drainage is started, the motor 6 is started to start the loosening control (step 101). The loosening control is performed as follows. That is, the rotation control signal is feedback-controlled based on the output signal of the rotation sensor 10 to keep the rotation speed of the washing / dehydrating tub 3 at a constant value. The rotation speed is controlled so that the acceleration on the inner wall surface of the washing / dehydrating tub 3 becomes approximately 1G. The feedback control method is as follows: reading of the rotation speed signal output from the rotation sensor 10 (step 102) → storing the rotation speed read data in the memory 24 (step 103) → comparison of the read rotation speed with a set rotation speed (step) 104) → Change of motor control output signal based on comparison result (step 10)
5) → Storing the changed motor control output data to the memory 24 (step 106) and repeating the above. After this feedback control is performed for a predetermined time, for example, 5 seconds (step 107), the control described below is performed.

In the above control, the laundry 14 inside the washing / dehydrating tub 3 shown in FIG. 5 is given an acceleration of slightly less than 1 G, so that the laundry 14 is close to the center at the top of the washing / dehydrating tub 3. When the portion drops (FIG. 6) and the direction of rotation of the washing / dehydrating tub 3 is clockwise as viewed from the front, it adheres to the right side surface of the washing / dehydrating tub 3 (FIG. 7). Since water 15 is still accumulated in the lower part of the washing / dehydrating tub 3, it spreads by being loosened when the laundry 14 passes through the water (FIG. 8), and is evenly distributed on the inner wall surface of the washing / dehydrating tub 3. Stick to.
When there is no water, the laundry does not get loosened, and the laundry remains attached in a dumpling state. Further, when the laundry 14 continues to rotate and is lifted, the laundry 14 contains a large amount of water, so that the laundry 14 is easily separated from each other as compared with the case where the amount of water is small,
A part of it falls downward before reaching the top of the washing / dehydrating tub 3 (FIG. 9), the dumpling state is relaxed and evenly adheres to the inner wall surface of the washing / dehydrating tub 3, and Loosening is performed (Fig. 10).

The second control method will be described with reference to the flowchart of FIG. After the first control method, the memory 2
4 stores the rotation speed signal and changes the rotation control signal based on the comparison result between the read rotation speed and the set rotation speed, while loosening the laundry (step 201), and stores it in the memory 24. If the rotation control signal is within a preset reference value, that is, the rotation control for the motor 6 is within a predetermined control condition range, the laundry washing / dehydrating tub 3 is so arranged that the laundry falls at the top of the washing / dehydrating tub 3. When it comes to operate (step 202), drainage permission determination is performed (step 203), and drainage operation is started (step 204).
In this way, since the drainage is performed after the completion of the loosening control, it is possible to reliably correct the imbalance of the laundry, and it is possible to shift to the spin-drying rotation speed in a short time, and to shorten the spin-drying time as a whole.

The third control method will be described with reference to the flowchart of FIG. During constant speed control, that is, during loosening control by the first control method (steps 301 to 303),
The average value m ₁ of the rotation control signals stored in the memory 24 is obtained (step 304), the rotation of the motor 6 is controlled by this average value m ₁ (step 305), and the output signal of the rotation sensor 10 is sequentially stored. (Step 30
6). If there is a large amount of imbalance in how the laundry sticks, there will be large fluctuations in the number of revolutions. When the fluctuation is extremely large, the constant speed control, that is, the loosening control by the first control method is returned to, and the rotation control signal m ₁ is rewritten. Further motor 6
The rotation speed fluctuation range is within a predetermined value, for example, 1
When the speed reaches 0 rpm, it is determined that the loosening is completed (step 307), and the drainage operation is started (step 308). Since the load of the motor 6 becomes lighter as the drainage progresses, the rotation speed of the washing / dehydrating tub 3 gradually increases, and the laundry remains attached to the inner wall of the washing / dehydrating tub 3. At this point, the laundry is not unbalanced in the washing / dehydrating tub 3, so that it is possible to accelerate the dehydration rotation speed at once. As described above, according to the present control method, it is possible to reliably correct the unbalance of the laundry, and it is possible to switch to the spin-drying rotation speed in a short time, so that the spin-drying time as a whole can be shortened.

The fourth control method will be described with reference to the flowchart of FIG. When the loosening control by the first control method is performed (steps 401 to 405), the memory 2
Look at the fluctuation range of the rotation control signal stored in 4. When there is a large amount of imbalance in how the laundry sticks, the torque fluctuations are large, and the rotation control signal for keeping the rotation speed constant is also large. Further, the same constant rotation speed control is continued to loosen, and the fluctuation range of the rotation control signal is within a predetermined value, for example, 1
When it reaches 0%, it is determined that the loosening is completed (step 40
6), the change of the rotation control signal is finished and fixed to a constant value (step 407), and the drainage operation is started (step 4).
08). Similarly to the above, since the load of the motor 6 becomes lighter as the drainage progresses, the rotation speed of the washing / dehydrating tub 3 gradually increases, and the laundry remains attached to the inner wall of the washing / dehydrating tub 3. Become. At this point, the laundry is not unbalanced in the washing / dehydrating tub 3, so that it is possible to accelerate the dehydration rotation speed at once. In this way, the unbalance of the laundry can be reliably corrected, and the spin speed can be changed to the spin speed in a short time, so that the spin time can be shortened.

[0019]

As described above, according to the first aspect of the invention, there is provided a washing / dehydrating tub which is rotatably provided around a horizontal axis in a water tub and which is partially immersed in the washing liquid in the water tub. A dehydration control device for a drum-type washing machine, comprising: rotating means for rotating the washing / dehydrating tub; rotation speed detecting means for detecting a rotating speed of the washing / dewatering tub; and discharging water in the water tub. A drainage means and a control means for controlling each operation of the rotating means and the drainage means are provided, and when the laundry in the washing / dehydrating tank is dehydrated, the control means is provided before the start of drainage by the drainage means. said rotating means is controlled based on an output signal of said rotational speed detecting means, wherein the laundry the laundry
Since the washing / dehydrating tub is configured to rotate at a rotation speed such that the washing / dehydrating tub falls at the top of the tub, in addition to performing loosening control without waiting for the completion of drainage, it is faster than when there is no water. Moreover, since the laundry is firmly attached to the inner wall of the washing / dehydrating tub to loosen the laundry, it can be started up to the spin-drying speed without causing an imbalance in the laundry. and it is possible to shorten the time required can be shortened drainage time, results
To loosen laundry easily, reliably and for a short time
Can be done at.

[0020]

According to the second aspect of the present invention, the dehydration control of the drum type washing machine having the washing and dehydrating tub which is rotatably provided around the horizontal axis in the water tub and is partially immersed in the washing liquid in the water tub. An apparatus, a rotating means for rotating the washing / dehydrating tub, a rotation speed detecting means for detecting a rotating speed of the washing / dehydrating tub, and a draining means for discharging water in the water tub,
And a control means for controlling each operation of the rotation means and the drainage means, and when the laundry in the washing / dehydrating tank is dehydrated, the control means detects the rotation speed before the drainage by the drainage means is started. The rotating means is controlled based on the output signal of the means, and the laundry is placed at the top of the washing / dehydrating tub.
At a rotational speed such as to fall by rotating the washing and dewatering tank,
Also, depending on the predetermined control condition range for the rotating means,
Make sure that the laundry falls at the top of the washing and dewatering tub.
The drainage is performed after the washing and dehydrating tank is in operation.
Since the drainage operation is performed by the means, the unbalance correction of the laundry can be reliably performed, and the dehydration rotation speed can be changed in a short time, so that the entire dehydration time can be shortened.

According to the third aspect of the invention, the dehydration control of the drum type washing machine having the washing and dehydrating tub which is rotatably provided around the horizontal axis in the water tub and is partially immersed in the washing liquid in the water tub. An apparatus, a rotating means for rotating the washing / dehydrating tub, a rotation speed detecting means for detecting a rotating speed of the washing / dehydrating tub, and a draining means for discharging water in the water tub,
And a control means for controlling each operation of the rotation means and the drainage means, and when the laundry in the washing / dehydrating tank is dehydrated, the control means detects the rotation speed before the drainage by the drainage means is started. The rotating means is controlled based on the output signal of the means, and the laundry is placed at the top of the washing / dehydrating tub.
At a rotational speed such as to fall by rotating the washing and dewatering tank,
In addition, the washing and dewatering tub can be washed against the rotating means.
The number of rotations at which the item falls at the top of the washing and dehydrating tub
In the output state of the rotation control signal of a constant value for
The washing / dehydrating tub detected by the rotation speed detecting means.
After the fluctuation range of the number of revolutions of the
Since the drainage operation is performed by means, the drainage is performed after the unbalance of the laundry is surely corrected after the completion of the loosening control, so that it is possible to shift to the dehydration rotation speed in a short time. The whole can be shortened.

According to the invention described in claim 4 , dehydration control of the drum type washing machine having a washing and dehydrating tub which is rotatably provided around the horizontal axis in the water tub and is partially immersed in the washing liquid in the water tub. An apparatus, a rotating means for rotating the washing / dehydrating tub, a rotation speed detecting means for detecting a rotating speed of the washing / dehydrating tub, and a draining means for discharging water in the water tub,
And a control means for controlling each operation of the rotation means and the drainage means, and when the laundry in the washing / dehydrating tank is dehydrated, the control means detects the rotation speed before the drainage by the drainage means is started. The rotating means is controlled based on the output signal of the means, and the laundry is placed at the top of the washing / dehydrating tub.
At a rotational speed such as to fall by rotating the washing and dewatering tank,
In addition, the number of rotations of the washing / dehydrating tub is determined by the laundry
Also keeps a constant number of rotations so that it drops at the top of the dehydration tank.
Fluctuation range of the rotation control signal for the rotating means for
The drainage movement by the drainage means after the
Since it is configured to operate, the same effect as the effect of the invention described in claim 3 can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a dehydration control device for a drum type washing machine according to the present invention.

FIG. 2 is a vertical cross-sectional view showing the configuration of the drum type washing machine in the above embodiment.

FIG. 3 is a block diagram showing a configuration of a control system in the above embodiment.

FIG. 4 is a flowchart for explaining a first control method in the above embodiment.

FIG. 5 is a diagram for explaining a state inside the washing / dehydrating tub at the time of loosening control in the embodiment.

FIG. 6 is a view for explaining the state in the washing / dehydrating tub at the time of loosening control following FIG. 5;

FIG. 7 is a view for explaining the state in the washing / dehydrating tub at the time of loosening control following FIG. 6;

FIG. 8 is a view for explaining the state inside the washing / dehydrating tub at the time of loosening control following FIG. 7;

FIG. 9 is a view for explaining the state in the washing / dehydrating tub at the time of loosening control following FIG. 8;

FIG. 10 is a view for explaining the state inside the washing / dehydrating tub at the time of loosening control following FIG. 9;

FIG. 11 is a flowchart for explaining a second control method in the above embodiment.

FIG. 12 is a flowchart for explaining a third control method in the above embodiment.

FIG. 13 is a flowchart for explaining a fourth control method in the above embodiment.

[Explanation of symbols]

1 outer box 2 aquarium 3 washing and dewatering tank 5 rotation axes 6 Motor (rotating means) 10 Rotation sensor (rotation speed detection means) 13 Drain valve (drainage means) 14 laundry 15 water 21 Main control circuit section (control means) 24 memory

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Fumihiro Imamura Inventor, 8 Shinsita-cho, Isogo-ku, Yokohama-shi, Kanagawa, Toshiba Research Institute for Living Space Systems (72) Inventor, Kappei Kamiya, Shin-Sugita-cho, Isogo-ku, Yokohama, Kanagawa Incorporated by Toshiba Corporation, Living Space System Technology Research Center (56) Reference JP-A-4-141192 (JP, A) JP-A-4-276293 (JP, A) JP-A-5-293288 (JP, A) JP-A-5 3-86197 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D06F 33/02

Claims (4)

(57) [Claims] 1. A dehydration control device for a drum type washing machine having a washing / dehydrating tub which is rotatably provided around a horizontal axis in a water tub and is partially immersed in a washing liquid in the water tub. Rotation means for rotating the dehydration tub, rotation speed detection means for detecting the rotation speed of the washing and dehydration tub, drainage means for discharging water in the water tub, and control of each operation of the rotation means and the drainage means When the laundry in the washing / dehydrating tub is dehydrated, the control means controls the rotation means based on the output signal of the rotation speed detection means before the drainage by the drainage means is started. If the laundry is
A dehydration control device for a drum type washing machine, characterized in that the washing / dehydration tub is rotated at a rotation speed such that the washing / dehydration tub falls at the top of the rinsing / dehydration tub. 2. A dehydration control device for a drum-type washing machine, comprising a washing / dehydrating tub which is rotatably provided around a horizontal axis in a water tub and is partially immersed in a washing liquid in the water tub. Rotation means for rotating the dehydration tub, rotation speed detection means for detecting the rotation speed of the washing and dehydration tub, drainage means for discharging water in the water tub, and control of each operation of the rotation means and the drainage means When the laundry in the washing / dehydrating tub is dehydrated, the control means controls the rotation means based on the output signal of the rotation speed detection means before the drainage by the drainage means is started. If the laundry is
The washing / dehydrating tub is rotated at a rotation speed such that the washing / dehydrating tub falls at the top of the rinsing / dehydrating tub, and a predetermined amount for the rotating means.
Depending on the control condition range, the laundry is the
The washing and dehydration tub operates so as to drop at the top
A drainage control device for a drum-type washing machine, characterized in that the drainage operation is performed by the draining means . 3. A dehydration control device for a drum type washing machine having a washing / dehydrating tank which is rotatably provided around a horizontal axis in a water tub and is partially immersed in a washing liquid in the water tub. Rotation means for rotating the dehydration tub, rotation speed detection means for detecting the rotation speed of the washing and dehydration tub, drainage means for discharging water in the water tub, and control of each operation of the rotation means and the drainage means When the laundry in the washing / dehydrating tub is dehydrated, the control means controls the rotation means based on the output signal of the rotation speed detection means before the drainage by the drainage means is started. If the laundry is
濯兼 rotating the washing and dewatering tank at a rotational speed such as to fall on top of the dewatering tank, also to said rotating means, said washing
The rinsing and dewatering tub is located at the top of the washing and dewatering tub.
A constant value of the rotation control signal to make the rotation speed fall.
In the output state of the No.
The fluctuation range of the number of rotations of the washing and dewatering tank is within a predetermined range.
A drainage control device for a drum-type washing machine, characterized in that the drainage operation is performed by the draining means . 4. A dehydration control device for a drum type washing machine having a washing / dehydrating tank which is rotatably provided around a horizontal axis in a water tub and is partially immersed in a washing liquid in the water tub. Rotation means for rotating the dehydration tub, rotation speed detection means for detecting the rotation speed of the washing and dehydration tub, drainage means for discharging water in the water tub, and control of each operation of the rotation means and the drainage means When the laundry in the washing / dehydrating tub is dehydrated, the control means controls the rotation means based on the output signal of the rotation speed detection means before the drainage by the drainage means is started. If the laundry is
濯兼 rotating the washing and dewatering tank at a rotational speed such as to fall on top of the dewatering tank, also the rotation speed of the washing and dewatering tank
Make sure that the laundry falls at the top of the washing and dewatering tub
To the rotating means for maintaining a constant rotation speed
After the fluctuation range of the rotation control signal is within the predetermined range,
A dehydration control device for a drum-type washing machine, which is configured to perform a drainage operation by drainage means .