JP3726331B2 - Washing machine - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a washing machine for washing clothes with a circulating water flow generated by driving a pulsator.
[0002]
[Prior art]
Conventionally, washing machines are mainly pulsator type. After putting clothes into the washing and dehydrating tub, add a certain amount of water and detergent, rotate the pulsator to stir the clothes and water, and dissolve the detergent. While acting on the dirt of the clothes, the clothes are rubbed with each other, or the clothes and the inner wall surface of the washing and dewatering tank and the pulsator surface are rubbed to remove the dirt.
[0003]
However, this method has a problem that the laundry is damaged and uses a large amount of water and detergent. In order to solve these problems, the inventors have proposed a washing machine as shown in FIG. Hereinafter, the configuration will be described.
[0004]
As shown in FIG. 11, the water receiving tub 1 includes a washing / dehydrating tub 3 in which a pulsator 2 is rotatably disposed at the bottom, and is suspended from a washing machine outer frame 5 by a suspension bar 4. A plurality of water passage covers 6 are provided on the inner surface of the washing and dewatering tub 3, and a plurality of water passages 7 are formed with the washing and dewatering tub 3. A back blade 8 is integrally formed on the back surface of the pulsator 2, and a pump chamber 9 is formed on the outer periphery of the back blade 8 so as to cover the back blade 8, and communicates with a plurality of water supply channels 7.
[0005]
A plurality of water spouts 10 opened toward the inside of the washing and dewatering tub 3 are provided in the upper part of the plurality of water supply channels 7, and a partition body 12 having a large number of holes 11 is detachably provided in the upper part of the pulsator 2. ing. The motor 13 drives the pulsator 2 or the washing and dewatering tub 3 via the V belt 14 and the speed reduction mechanism / clutch 15. The drain valve 16 drains the washing water in the washing / dehydrating tub 3, and the water supply valve 17 supplies water to the washing / dehydrating tub 3. The washing / dehydrating tub 3 is provided with a fluid balancer 18 for reducing vibration during dehydration, and the upper portion of the washing / dehydrating tub 3 is covered with a lid 19.
[0006]
The control device 20 controls the motor 13, the drain valve 16, the water supply valve 17, and the like to sequentially control each process of washing, rinsing, and dehydration. The laundry 21 is installed on the partition 12 and does not come into direct contact with the pulsator 2.
[0007]
In the above configuration, when the motor 3 is driven by the control device 20 to rotate the pulsator 2, a downward water flow 22 is generated substantially at the center of the partition 12, and at the same time, a plurality of water spouts 10 form a waterfall. The washing water 23 is sprinkled and the washing water is circulated. Since the circulated washing water passes through the laundry 21, the washing 21 is washed by repeating this circulation.
[0008]
[Problems to be solved by the invention]
In such a washing machine, it is required that the clothes are evenly wet with the wash water and the wash water passes through the entire surface of the clothes. However, if the clothes to be washed are made of highly water-repellent fibers such as wool, it is difficult for the washing water to penetrate, so it is difficult to evenly wet the clothes, and the circulating washing water acts on the dirt on the clothes. In some cases, the cleaning performance deteriorates.
[0009]
In addition, when the clothes to be washed are made of highly water-repellent fibers such as wool, the washing water is difficult to permeate, so that it floats above the partition 12 and is moved upward by the water flow caused by the rotation of the pulsator 2. , And the mechanical force caused by the collision with the inner wall surface of the washing and dewatering tub 3 and the upper surface of the partitioning body 12 causes a problem of felting.
[0010]
In addition, when powder detergent is used, undissolved residue of the powder detergent is likely to occur. Therefore, when washing water containing undissolved residue is circulated, it remains on the upper surface of the clothing on the partition 12 and works effectively. There was a problem that the amount of the detergent was reduced and the cleaning performance was deteriorated .
[0011]
The present invention solves the above-mentioned problem, and even in a garment made of highly water-repellent fibers such as wool, the washing water penetrates into the garment so that the washing water can be sufficiently passed and circulated. The first object is to enable removal of dirt .
[0012]
[Means for Solving the Problems]
The first means in the washing machine of the present invention is such that a pulsator is rotatably disposed at the bottom of the washing / dehydrating tub, a pump chamber is formed on the outer periphery of the back blade of the pulsator, and the washing / dehydrating tub is formed by the pump chamber. The wash water inside is fed to the upper part of the washing and dewatering tank through a water supply channel provided with a sprinkling port, and a partition body is disposed so as to cover the top of the pulsator, and the water supply valve control means supplies water to the set water level. temporarily stopped the water supply valve at the stage of washing water at the bottom of the garment the water level detecting means installed below the set level on the low Ku partition plate detects a predetermined water level is a water level to penetrate the middle, predetermined by pulsator control means The time pulsator is configured to be intermittently driven.
[0013]
As a result, high-concentration washing water gradually permeates from the lower surface of the garment, and air stagnation between the garments is eliminated by the vibration of water generated by the driving of the pulsator. Even if it is the clothing which consists of textiles, washing water can be osmose | permeated to the inside of clothing, and the washing water can be sufficiently passed and circulated to remove dirt .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there is provided a pulsator rotatably disposed at the bottom of the washing and dewatering tub, a pump chamber formed on the outer periphery of the back blade of the pulsator, and the washing and dehydration by the pump chamber. A water supply path for supplying the washing water in the dewatering tank to the upper part of the washing and dewatering tank, a water spray port provided in the water supply path, a partition disposed so as to cover the upper part of the pulsator, and driving of the pulsator Pulsator control means for controlling, water supply valve control means for controlling opening and closing of a water supply valve for supplying water into the washing and dehydrating tub, and water level detecting means for detecting the water level in the washing and dehydrating tub, stage water supply valve control means, which in the water supply way to the set water level, detects a predetermined water level wash water is water that penetrates the lower portion of the garment that the water level detecting means installed in the low-Ku the partition plate on than the set water level At the water supply valve The pulsator control means intermittently drives the pulsator for a predetermined time by the pulsator control means, and the washing water permeates from the lower part of the clothing, and an air pool may be caught between the clothing. Therefore, even if the clothes are made of highly water-repellent fibers such as wool, the washing water can penetrate into the clothes, and the circulating washing water acts on the dirt of the clothes and can be washed cleanly.
[0015]
The invention according to claim 2 is the invention according to claim 1, wherein the pulsator control means supplies the washing water from the sprinkling port and the first driving time period when the washing water in the washing and dewatering tub is not sprinkled from the watering port. A second driving time period for spraying water, and when the pulsator is intermittently driven when the water supply is stopped by the water supply valve control means, it is driven for a predetermined time in the second driving time period after being driven for a predetermined time in the first driving time period. After the detergent is dissolved in the water supplied in the first driving time to make the washing water, the washing water is sufficiently supplied from the sprinkling port to the clothing from the upper part of the clothing in the second driving time. It is possible to prevent the garment from rotating by the rotation of the pulsator, and the garment can be prevented from being damaged .
[0016]
According to a third aspect of the present invention, there is provided a pulsator rotatably disposed at the bottom of the washing / dehydrating tub, a pump chamber formed on the outer periphery of the back blade of the pulsator, and the washing / dehydrating tub by the pump chamber. A water supply channel for supplying the washing water to the upper part of the washing and dehydration tank, a water spray port provided in the water supply channel, a partition body disposed so as to cover the upper part of the pulsator, and controlling the driving of the pulsator The water supply valve control comprises: a pulsator control means; a water supply valve control means for controlling opening and closing of a water supply valve for supplying water into the washing and dewatering tank; and a water level detection means for detecting the water level in the washing and dewatering tank. During the water supply to the set water level, the means temporarily stops the water supply valve when the water level detecting means detects a plurality of predetermined water levels lower than the set water level, and the pulsator control means Ta was to be intermittently driven, which the water supply stops the first is constructed so as to be level lower than the installation height of the partition member, in the course of the water supply water to the washing water, without having to circulate the washing water By circulating the washing water containing the undissolved residue, the undissolved residue does not remain on the upper surface of the clothing on the partition, and the cleaning performance can be improved .
[0017]
【Example】
Embodiments of the present invention will be described below 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.
[0018]
(Example 1)
As shown in FIG. 1, the control device 24 includes a pulsator control means 25 that controls the driving of the pulsator 2, a water supply valve control means 26 that controls the opening and closing of the water supply valve 17, and a washing time control means 27 that controls the washing time. The motor 13, the drain valve 16 and the water supply valve 17 are controlled via the dehydration control means 28 for controlling the dehydration force, and the respective steps of washing, rinsing and dehydration are sequentially controlled. The water level detecting means 29 detects the water level in the washing / dehydrating tub 3, and the water temperature detecting means 30 detects the water temperature in the washing / dehydrating tub 3. The detected information is sent to the control device 24. You are typing.
[0019]
The water supply valve control means 26 temporarily stops the water supply valve 17 when the water level detection means 29 detects a plurality of predetermined water levels lower than the set water level during the water supply to the set water level. The time pulsator is configured to be intermittently driven.
[0020]
The operation will be described with reference to FIG. 2 in the above configuration. First, at step 31, the detergent is put into the washing / dehydrating tub 3, and the partition 12 is set at a predetermined position in the washing / dehydrating tub 3 at step 32. Thereafter, in step 33, the garment 21 is set on the partition 12. Next, in step 34, a washing water level is set by a water level setting switch (not shown) provided in the control device 24, and in step 35, a start switch (not shown) is pressed to start washing. At this time, one or a plurality of predetermined water levels are set simultaneously depending on which water level is set. In the following description, the case of having two predetermined water levels will be described.
[0021]
By pressing the start switch, the control device 24 sends a signal to the water supply valve control means 26 in step 36 to turn on the water supply valve 17 and supply water into the washing and dewatering tub 3. In step 37, the water level detection means 29 detects the water level in the washing and dewatering tub 3 to determine whether the first predetermined water level set by the water level setting has been reached. If the first predetermined water level has been reached, the water supply valve 17 is turned off in step 38, the pulsator 2 is intermittently driven for a predetermined time in step 39, and then the water supply valve 17 is turned on again in step 40 to supply water.
[0022]
In step 41, the water level detection means 29 determines whether the second predetermined water level has been reached. If the second predetermined water level has been reached, the water supply valve 17 is turned off in step 42, the pulsator 2 is intermittently driven for a predetermined time in step 43, and then the water supply valve 17 is turned on again in step 44 to supply water. Next, in step 45, the water level detection means 29 determines whether the set water level has been reached. If the set water level has been reached, the water supply valve 17 is turned off at step 46, and washing is started at step 47.
[0023]
As described above, by intermittently driving the pulsator 2 at a plurality of predetermined water levels provided up to the set water level at the time of washing, the washing water is poured from the lower part of the garment while stirring the added detergent and water to make uniform washing water. In addition, the air between clothes can be expelled by the movement of water due to intermittent drive, and air accumulation can be prevented, and the washing water circulating can be evenly infiltrated into the clothes. Acts on dirt on clothes and can be washed cleanly.
[0024]
(Example 2)
As shown in FIG. 3A, the pulsator control means 25 in FIG. 1 is composed of a short reversal time period due to a short pulsator on time and a relatively short off time. A first drive time period in which the washing water is not sprinkled and a second drive time period constituted by an inversion time in which the wash water is sufficiently dispersed from the water spout 10 as shown in FIG. 3B. When the pulsator 2 is intermittently driven while the water supply is stopped by the water supply valve control means 26, the pulsator 2 is driven for a predetermined time in the first driving time period and then for a predetermined time in the second driving time period. Other configurations are the same as those of the first embodiment.
[0025]
The operation in the above configuration will be described. The detergent and water put into the washing and dewatering tub 3 can be agitated by the first drive time shown in FIG. 3A to obtain uniform washing water. Washing water produced in one drive time can be supplied from the top of the garment 10 through the sprinkling port 10 in the second drive time, and even when powder detergent is used, the powder detergent does not cause undissolved residue and washing. Water works effectively on clothes and can improve cleaning performance.
[0026]
(Example 3)
The pulsator control means 25 in FIG. 1 drives the pulsator 2 for a predetermined time at the first driving time period and the second driving time period at a predetermined water level in the middle of water supply, and then the first driving time period during the water supply to the next predetermined water level. It is configured to drive only. Other configurations are the same as those in the first or second embodiment.
[0027]
The operation of the above configuration will be described with reference to FIG. Steps 37 to 47 are the same as the operation of the first embodiment, and a description thereof will be omitted.
[0028]
During the water supply from the first predetermined water level to the second predetermined water level in step 40, the pulsator 2 is driven at the first driving time period in step 50, and the supplied water is stirred at the same time as the water supply and washed. The washing water in the cum dewatering tank 3 can be quickly and uniformly made into washing water. Therefore, the supplied water can be agitated at the same time as the water supply, and the washing water in the washing and dehydrating tub can be quickly and uniformly made into washing water. Even when powder detergent is used, powder detergent remains undissolved. In addition, the washing water can effectively work on the clothes and improve the washing performance.
[0029]
(Example 4)
The water supply valve control means 26 in FIG. 1 is configured such that the first water supply stop (first predetermined water level) becomes a water level lower than the installation height of the partition body 12. Other configurations are the same as those in the first to third embodiments.
[0030]
FIG. 5 shows the relationship between the set water level and the predetermined water level. As shown in FIG. 5, the first predetermined water level P1, the second predetermined water level P2, and the third predetermined water level P3 are set at regular intervals. The first predetermined water level P1 is set to a level lower than the installation height of the partition body 12. PS1, PS2, and PS3 are a first set water level, a second set water level, and a third set water level, respectively.
[0031]
The operation of the above configuration will be described. When the pulsator 2 is intermittently driven at a predetermined water level provided up to the set water level at the time of washing, the supplied detergent and water are stirred to obtain uniform washing water. By making the predetermined water level P1 lower than the installation height of the partitioning body 12, the wash water containing the undissolved water is circulated without circulating the wash water in the middle of making the supplied water into the wash water. As a result, the undissolved residue does not remain on the upper surface of the clothing on the partition, and the cleaning performance can be improved.
[0032]
(Example 5)
The pulsator control means 25 in FIG. 1 has a third driving time period in which the on time is longer than the off time as shown in FIG. 6A and a fourth time period in which the on time is shorter than the off time as shown in FIG. It has a driving time period, and is configured to determine the driving ratio in the washing process of the third driving time period and the fourth driving time period according to the determination of the water temperature detecting means 30. Other configurations are the same as those of the first embodiment.
[0033]
The operation of the above configuration will be described with reference to FIGS. When the pulsator 2 is driven in the third driving time period, since the on time per one reversal cycle is longer than the off time, a large amount of washing water can be sprinkled from the water spout 10, and the pulsator 2 is driven fourth. When driven in a time limit, since the ON time per inversion cycle is shorter than the OFF time, a small amount of washing water can be sprinkled from the water spout 10.
[0034]
Washing is started at step 47 in FIG. 7 and the pulsator 2 is driven at step 49. In step 50, the water temperature in the washing / dehydrating tub 3 is detected by the water temperature detecting means 30, and if the water temperature is lower than the reference value, the process proceeds to step 51, and the pulsator 2 is driven at the first drive ratio as shown in FIG. When the water temperature is higher than the reference value, the process proceeds to step 52, and the pulsator 2 is driven at the second drive ratio as shown in FIG.
[0035]
The first drive ratio shown in FIG. 8A is configured so that the drive in the third drive time period is longer than the drive in the fourth drive time period, and when the water temperature is lower than the reference value, Even if the amount of water spray is increased, foaming in the washing and dewatering tub 3 is reduced, so that the total water spray amount can be increased by driving in the third drive time period to improve the cleaning performance.
[0036]
The second drive ratio shown in FIG. 8B is configured such that the drive in the third drive time period is shorter than the drive in the fourth drive time period, and when the water temperature is higher than the reference value, When the amount of water sprayed is large, foaming in the washing and dewatering tub 3 becomes high, so that the total water spray amount can be lowered by driving in the fourth drive time period, and the foaming can be kept below a certain level.
[0037]
As described above, the drive ratio in the washing process is determined by determining the water temperature in the washing / dehydrating tub 3 to make the foaming in the washing / dehydrating tub 3 practically unimpeded and even when the water temperature is low. Stable cleaning performance can be ensured.
[0038]
(Example 6)
The washing time control means 27 in FIG. 1 extends the washing time based on the determination of the water temperature detection means 30, and the pulsator control means 25 is configured to drive the pulsator 2 in the third drive time during the extended time. . Other configurations are the same as those of the fifth embodiment.
[0039]
The operation of the above configuration will be described with reference to FIG. Washing is started in step 47, and the pulsator 2 is driven in step 49. When a predetermined washing time elapses in step 53, the process proceeds to step 54, where the water temperature detecting means 30 detects the water temperature in the washing and dewatering tub 3. If the water temperature detected by the water temperature detecting means 30 at step 54 is lower than the reference value, the process proceeds to step 55, where the washing time is extended by a predetermined time and the pulsator 2 is driven. At this time, the pulsator control means 25 drives the pulsator 2 in the third drive time period. Therefore, even when the water temperature in the washing and dewatering tank 3 is low, stable cleaning performance can be ensured.
[0040]
(Example 7)
The dehydration control means 28 in FIG. 1 has a plurality of control patterns with different on-time periods for intermittent dehydration, and is configured to determine the control pattern based on the determination by the water temperature detection means 30. Other configurations are the same as those of the first embodiment.
[0041]
The operation of the above configuration will be described with reference to FIG. In step 56, washing is terminated, and in step 57, the drain valve 16 is turned on to start draining. In step 58, the water temperature in the washing and dewatering tub 3 detected by the water temperature detecting means 30 is determined. When the water temperature is higher than T1 (for example, 15 ° C.), the process proceeds to step 59, and the dehydration control means 28 is set in the first dehydration control pattern. Control. When the water temperature is lower than T1 in step 58, the process proceeds to step 60. When the water temperature is higher than T2 (for example, 5 ° C.), the process proceeds to step 61, and the dehydration control means 28 is controlled by the second dehydration control pattern. When the water temperature is lower than T2 at step 60, the routine proceeds to step 62, where the dehydration control means 28 is controlled by the third dehydration control pattern. In step 63, the drain valve 16 is turned off.
[0042]
The first dehydration control pattern drives the laundry test dehydration tank 3 with 2.5 seconds on-5 seconds off, and the second dehydration control pattern drives the laundry test dehydration tank 3 with 3 seconds on-5 seconds off, In the third dehydration control pattern, the laundry test dehydration tank 3 is driven for 3.5 seconds on-5 seconds off. Therefore, even when the moisture content of the clothes varies depending on the water temperature, the dehydration speed can be made substantially constant, and stable dewatering performance can be ensured.
[0043]
【The invention's effect】
As described above, according to the invention described in claim 1 of the present invention, the pulsator disposed rotatably at the bottom of the washing and dewatering tub, the pump chamber formed on the outer periphery of the back blade of the pulsator, A water supply path for supplying the washing water in the washing / dehydrating tub to the upper part of the washing / dehydrating tub by the pump chamber, a water spray port provided in the water supply path, and a partition body arranged to cover the upper part of the pulsator , A pulsator control means for controlling the driving of the pulsator, a water supply valve control means for controlling opening and closing of a water supply valve for supplying water into the washing and dewatering tub, and a water level detection for detecting the water level in the washing and dewatering tub and means, the water supply valve control unit, in the water supply way to the set water level, wash water in the lower part of the garment where the water level sensing unit installed in the low-Ku the partition plate on than the set water level is a water level to penetrate Detects a predetermined water level In this stage, the water supply valve is temporarily stopped and the pulsator control means is intermittently driven for a predetermined time by the pulsator control means. Therefore, even if the clothes are made of water-repellent fibers such as wool, Since it penetrates from the bottom of the clothes and does not entrap air between the clothes, washing water can be evenly penetrated into the clothes, and the circulating washing water acts on the dirt of the clothes and can be washed cleanly .
[0044]
According to the second aspect of the present invention, the pulsator control means includes a first driving time period in which the washing water in the washing and dewatering tub is not sprinkled from the watering port and a second driving time period in which the washing water is sprinkled from the watering port. When the pulsator is intermittently driven when water supply is stopped by the water supply valve control means, it is configured to drive for a predetermined time in the second driving time after being driven for a predetermined time in the first driving time, By sprinkling water from the upper part of the clothing to fully penetrate the clothing and making it heavy, even clothing made of water-repellent fibers such as wool will not rise as the water level rises. The clothes do not rotate by the rotation, and the clothes can be prevented from being damaged .
[0045]
According to the invention described in claim 3 , a pulsator rotatably disposed at the bottom of the washing and dewatering tub, a pump chamber formed on the outer periphery of the back blade of the pulsator, and a washing by the pump chamber A water supply path for supplying washing water in the cum dehydration tank to the upper part of the washing and dehydration tank, a water spray port provided in the water supply path, a partition disposed so as to cover the upper part of the pulsator, and a pulsator Pulsator control means for controlling driving, water supply valve control means for controlling opening and closing of a water supply valve for supplying water into the washing and dehydrating tub, and a water level detecting means for detecting the water level in the washing and dehydrating tub, The water supply valve control means temporarily stops the water supply valve when the water level detection means detects a plurality of predetermined water levels lower than the set water level in the middle of water supply to the set water level, and the pulsator control means So as to intermittently drive the constant time pulsator, because the water supply is stopped for the first time is configured to be level lower than the installation height of the partition member, in the course of the water supply water to the washing water, to circulate the washing water In addition, by circulating the washing water containing the undissolved residue, the undissolved residue does not remain on the upper surface of the clothing on the partition, and the cleaning performance can be improved .
[ Brief description of the drawings]
FIG. 1 is a system configuration diagram of a washing machine according to a first embodiment of the present invention. FIG. 2 is an operation flowchart of a water supply process of the washing machine. FIG. 3A is a washing machine according to a second embodiment of the present invention. (B) Time chart of the second drive time period of the washing machine [FIG. 4] FIG. 5 is an operation flowchart of the main part of the water supply process of the washing machine according to the third embodiment of the present invention. FIG. 6 is a longitudinal sectional view of a washing machine according to a fourth embodiment of the invention. FIG. 6A is a time chart of a third drive time limit of the washing machine according to the fifth embodiment of the present invention. FIG. 6B is a fourth drive of the washing machine. Time chart of time limit [FIG. 7] Operation flowchart of washing process of the washing machine [FIG. 8] (a) Process diagram of the first driving ratio of the pulsator in the washing process of the washing machine (b) Washing process of the washing machine FIG. 9 is a process chart of the pulsator of the second drive ratio according to the sixth embodiment of the present invention. 7 vertical sectional view of a main part flowchart 11 conventional washing machine of spin-drying operation of the washing machine in the embodiment of the main part flowchart invention; FIG washing operation of 濯機 EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 2 Pulsator 3 Washing / dehydration tank 7 Water supply path 8 Back blade 9 Pump chamber 10 Sprinkling port 12 Partition body 17 Water supply valve 25 Pulsator control means 26 Water supply valve control means 29 Water level detection means

Claims (3)

A pulsator rotatably disposed at the bottom of the washing / dehydrating tub, a pump chamber formed on the outer periphery of the back blade of the pulsator, and the washing water in the washing / dehydrating tub by the pump chamber A water supply channel for supplying water, a water spray port provided in the water supply channel, a partition disposed so as to cover the upper part of the pulsator, pulsator control means for controlling the driving of the pulsator, and the washing A water supply valve control means for controlling opening and closing of a water supply valve for supplying water into the dewatering tank; and a water level detection means for detecting the water level in the washing and dewatering tank, wherein the water supply valve control means is in the middle of water supply to a set water level. in, with temporarily stopping the water supply valve at the stage where the water level detecting means detects a predetermined water level wash water is water to penetrate the lower part of the garment which is installed in a low Ku the partition plate on than the set water level, the Pal Washing machine that is configured to intermittently drive the predetermined time pulsator at Ta control means. The pulsator control means has a first driving time period in which the washing water in the washing and dewatering tub is not sprinkled from the water spout and a second driving time period in which the washing water is sprinkled from the water spout, and when the water supply valve control means stops the water supply. 2. The washing machine according to claim 1, wherein during intermittent driving of the pulsator, the driving is performed for a predetermined time in the second driving time period after being driven for a predetermined time in the first driving time period . A pulsator rotatably disposed at the bottom of the washing / dehydrating tub, a pump chamber formed on the outer periphery of the back blade of the pulsator, and the washing water in the washing / dehydrating tub by the pump chamber A water supply channel for supplying water, a water spray port provided in the water supply channel, a partition disposed so as to cover the upper part of the pulsator, pulsator control means for controlling the driving of the pulsator, and the washing A water supply valve control means for controlling opening and closing of a water supply valve for supplying water into the dewatering tank; and a water level detection means for detecting the water level in the washing and dewatering tank, wherein the water supply valve control means is in the middle of water supply to a set water level. The water level detecting means temporarily stops the water supply valve when the water level detecting means detects a plurality of predetermined water levels lower than the set water level, and the pulsator control means intermittently drives the pulsator for a predetermined time. To, washing machines where the water supply is stopped for the first time is configured to be level lower than the installation height of the partition member.

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