JPH11319364A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the solubility of a detergent at the washing process and to make the concentration of washing water in the washing and dehydrating tub uniform to enable washing water to efficiently act on soil of washing, in a washing machine which efficiently removes soil of washing by effective action of washing water. SOLUTION: This washing machine is equipped with an agitating blade 8 rotatable at the inner bottom part of the washing and dehydrating tub 2 rotatably equipped in an outer tub 1, and action of water feed valve 10 to feed water into the washing and dehydrating tub 2 and a motor 5 to drive the washing and dehydrating tub 2 or the agitating blade 8 is controlled by a control means to control the processes. The control means carries out a second process to spray washing water to the washing and dehydrating tub 2 from between the outer tub 1 and the washing and dehydrating tub 2 at least one before a first process to rotate the agitating blade 8 or during the first process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for efficiently removing dirt by effective operation of washing water.

[0002]

2. Description of the Related Art Conventionally, a typical washing machine is a washing machine in which a stirring blade called a pulsator is rotated to wash the washing machine. The structure of the washing machine will be described with reference to FIG.

[0003] As shown in FIG. 19, the outer tub 30 includes a washing and dewatering tub 32 in which a stirring blade 31 is rotatably arranged at the bottom, and is suspended from a washing machine outer frame 34 by a hanging bar 33. . The motor 35 is connected to the stirring blade 31 or the washing / dewatering tub 32 via a V-belt 36 and a speed reduction mechanism / clutch 37.
Drive.

A drain valve 38 drains the washing water in the washing and dewatering tub 32, and a water supply valve 39 supplies water to the washing and dewatering tub 32. The washing and dewatering tub 32 is provided with a fluid balancer 40 for reducing vibration during dehydration, and a lid 41 is provided above the washing and dewatering tub 32. Control device 42
Controls the motor 35, the drain valve 38, the water supply valve 39, and the like to sequentially control the washing, rinsing, and dehydrating processes.

The operation of the above construction will be described. After the laundry and a predetermined amount of detergent have been put into the washing and dewatering tub 32, when the operation is started, the water supply valve 39 is controlled by the control device 42, and Is supplied with a predetermined amount of water, and then the control device 42 controls the motor 35 to rotate the stirring blade 31. The laundry and the water in the washing / dewatering tub 32 are stirred by the rotation of the stirring blade 31, and the detergent gradually dissolves into washing water by this stirring, thereby acting on the soil of the laundry.

[0006]

However, in such a conventional configuration, it is common to rotate the stirring blade 31 at a high speed to stir the laundry and water in order to dissolve the detergent added. In this case, in order to prevent excessive mechanical force from being applied to the laundry, a predetermined amount of water is supplied to the washing / dewatering tub 32 and then the stirring by the stirring blades 31 is performed.

That is, since the stirring blades 31 are not stirred until a predetermined amount of water is supplied, the water supply time has no meaning from the viewpoint of removing stains from the laundry. In addition, the supplied water will permeate the laundry as it is, and in this case, the detergent that has begun to dissolve due to the start of stirring penetrates the entire laundry and reaches a predetermined level until the concentration is uniform to a level necessary for removing stains. Time is required, and in this case too, it is wasted time from the viewpoint of dirt removal.

Further, it is inefficient to perform stirring by the stirring blades 31 while the detergent is not sufficiently acting on the laundry from the viewpoint of damage to the laundry. That is,
When the laundry is stirred in a state where the detergent has low solubility, mechanical force by the stirring blades 31 while the washing effect of the detergent is low, that is, frictional force is applied to the laundry surface, and as a result, the laundry surface becomes fuzzy. However, there is a problem that the damage is caused.

[0009] The present invention solves the above-mentioned problems, and improves the solubility of the detergent in the washing process, makes the concentration of the washing water in the washing and dewatering tub uniform, and effectively uses the washing water to wash the laundry. It is intended to act on dirt.

[0010]

According to the present invention, in order to achieve the above object, a stirring blade is rotatably provided at an inner bottom of a washing and dewatering tub rotatably provided in an outer tub. The control means controls the operation of a water supply means for supplying water to the water, a driving means for driving the washing and dewatering tub or the stirring blades to control the stroke, and the control means rotates the stirring blades at a predetermined water level. A second step of sprinkling washing water from between the outer tub and the washing / dewatering tub into the washing / dewatering tub by rotation of the washing / dewatering tub is performed before the step or at least one of between the first steps. It is like that.

Thus, the solubility of the detergent in the washing process can be improved, and the concentration of the washing water in the washing and dewatering tub can be made uniform, so that the washing water can be effectively stained. Can be acted upon.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a washing and dewatering tub rotatably provided in an outer tub, and a stirring blade rotatably provided at the inner bottom of the washing and dewatering tub. Water supply means for supplying water into the washing and dewatering tub, driving means for driving the washing and dewatering tub or stirring blades, and the water supply means,
Control means for controlling operations such as driving means to control a stroke, wherein the control means is provided at least one of before or during a first stroke of rotating the stirring blade at a predetermined water level. The second operation of spraying washing water into the washing and dewatering tub from between the outer tub and the washing and dewatering tub by rotation of the washing and dewatering tub.
It is possible to improve the solubility of the detergent and the permeation of the washing water into the laundry, as well as the washing and dewatering tub, as compared with the washing process in which only the stirring is performed by the stirring blades. The concentration of washing water can be made uniform,
The washing water can effectively act on the stains on the laundry.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a load detecting means for detecting an amount of the laundry in the washing and dewatering tub, and the control means controls the load detecting. The number of revolutions of the washing and dewatering tub in the second step can be varied according to the output of the means, and the amount of laundry in the washing and dewatering tub and the excessive amount of washing water depending on the amount of water Foaming can be suppressed, and optimum detergent dissolution and optimum watering of washing water can be performed.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the control means sets the time of the first stroke and the second stroke in accordance with the output of the load amount detecting means. It is variable and prevents the solubility of the detergent from decreasing due to the amount of the laundry in the washing and dewatering tub, the uniformity of the washing water concentration in the washing and dehydrating tub and the deterioration of the washing performance due to insufficient stirring. be able to.

[0015] The invention described in claim 4 is the above-mentioned claim 1-
In the invention described in Item 3, the control means is capable of changing the reversal time of the stirring blade in the first stroke in accordance with the output of the load amount detection means. The washing effect can be obtained with the optimal mechanical force that does not damage the laundry.

[0016] The invention according to claim 5 provides the above-mentioned claims 1 to
In the invention described in 3, the control means can change the reversing rotation speed of the stirring blade in the first stroke and the rotation speed of the washing and dewatering tub in the second stroke according to the output of the load detection means. It is suitable to prevent excessive washing water bubbling due to the amount of laundry in the washing and dewatering tub and the amount of water, and to perform optimal detergent dissolution and optimal washing water sprinkling while not damaging the laundry. The cleaning effect can be obtained with the mechanical force of

According to a sixth aspect of the present invention, in the first aspect of the present invention, the control means controls a ratio of an operation time between the first and second strokes according to an amount of dirt on the laundry. In addition, the cleaning course can be obtained with an optimal mechanical force that does not damage the laundry without damaging the cloth.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the control means controls a ratio of an operation time between the first stroke and the second stroke in accordance with a type of the laundry cloth. It is also a combination of a driving course that changes the water level and the predetermined water level to a higher level.In delicate clothes that are easily damaged, the optimal mechanical power that does not damage the laundry is higher than the predetermined water level that is difficult to transmit the mechanical power. At the water level, a cleaning effect can be obtained without damaging the cloth.

According to an eighth aspect of the present invention, in the first aspect of the present invention, the control means controls the ratio of the operating time between the first and second strokes according to the type of laundry cloth. In addition to the change of the water level and the predetermined water level, it also has an operation course that suppresses the reversal time of the agitating blade, so that in delicate clothes that are easily damaged, the optimal mechanical power that does not damage the laundry, and the mechanical power The cleaning effect can be obtained at a water level higher than a predetermined water level at which the transmission of the cloth is difficult, without damaging the cloth and minimizing the entanglement of the cloth.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

(Example 1) As shown in FIG.
Has a washing and dewatering tub 2 rotatably disposed therein, and is suspended from a washing machine outer frame 4 by a hanging rod 3. A motor (drive means) 5 rotationally drives a washing / dewatering tub 2 or a stirring blade 8 rotatably disposed at the inner bottom of the washing / dewatering tub 2 via a V-belt 6 and a speed reduction mechanism 7. The cover body 9 forms a discharge part for watering provided on the upper part of the outer tub 1. A water supply valve (water supply means) 10 is for supplying water into the washing and dewatering tub 2, a water level detection means 11 is for detecting a water level in the outer tub 1, and a drain valve 12 is provided in the outer tub 1. Is to drain the washing water.

The control device 13 is constructed as shown in FIG. 2, and the control means 14 is composed of a microcomputer.
The operation of the water supply valve 10, the drain valve 12, and the like is controlled, and a series of steps such as washing, rinsing, and dehydration are sequentially controlled. The input setting means 16 sets a driving course and the like, and the control means 14 inputs information from the input setting means 16 and displays it on the display means 17 based on the information to inform the user. The storage unit 18 stores data necessary for control by the control unit 14. Reference numeral 19 denotes a commercial power supply, and reference numeral 20 denotes a power switch.

Here, the control means 14 has a first step of rotating the stirring blade 8 and a second step of rotating the washing and dewatering tub 2 in the washing step.

The operation of the above configuration will be described with reference to FIG. 3 showing the first step. After the laundry and the detergent are put into the washing and dewatering tub 2, the water supply valve 10 is operated to operate the washing and dewatering tub 2.
When the internal water level reaches the set water level S1, the water supply valve 10 is stopped, and the washing and dewatering tub 2 is rotated. As shown in FIG. 3A, between T1 and T2, the washing and dewatering tub 2 rotates at a rotation speed R1 as shown in FIG. 3B.

When the washing and spin-drying tub 2 is rotated at the set water level S1, the water level in the washing and spin-drying tub 2 is set at the center as shown in FIG. The part descends, the space between the washing and dewatering tub 2 and the outer tub 1 rises, and finally water is sprayed into the washing and dewatering tub 2 beyond the height of the upper end of the washing and dewatering tub 2. Rotation speed R1
Is set in advance to the number of revolutions at which the washing water is sprinkled into the washing and dewatering tub 2.

After the water is supplied to the set water level S1, the washing and dewatering tub 2 is rotated, and the washing water is sprinkled from the upper part of the washing and dewatering tub 2 during a predetermined time T2, and The circulation in the inside is the operation of the second stroke.

During a predetermined time (between T1 and T2) of the second stroke, the detergent added before water supply starts to dissolve, and FIG.
As shown in (1), the washing water concentration in the washing and dewatering tub 2 rises while spraying the washing water at the same time as the rotation starts, while the washing water concentration in the washing and dewatering tub 2 remains almost uniform. Then, after a temporary high concentration of over 100%,
A concentration of almost 100% is reached.

Further, in the second step, since no frictional force is directly applied to the laundry, the laundry is not damaged.

Next, the operation of the first step will be described with reference to FIG. 5. A predetermined amount of water is supplied into the washing and dewatering tub 2, and the washing and dewatering tub 2 is rotated to dissolve the detergent. After
As shown in FIG. 5, the stirring blade 8 is operated to stir the laundry. As shown in FIG. 3 (d), the operation of agitating the laundry with the agitating blades 8 and removing dirt from T2 to T3 is the operation of the first operation.

Before this step, the washing water is evenly penetrated into the laundry, so that the agitation force is applied to the laundry so that dirt is efficiently removed.

Further, mechanical power is added to the laundry by stirring, but the friction mechanical force applied to the surface of the laundry is reduced by the lubricating action of the washing water permeated into the laundry, and the detergent is removed by the first stroke. Since the material is dissolved, the stirring time can be reduced by that amount, and damage to the laundry caused by applying excessive friction mechanical force can be prevented.

In the present embodiment, the second step is executed before the first step. However, the second step may be executed during the first step. Can be submerged by applying a stirring force after water is supplied to the upper portion of the laundry to the set water level, and the solubility of the detergent in the subsequent second step is further improved.

Further, the second step may be executed before the first step, and thereafter, the second step may be executed during the first step. In this case, the first second step is executed. In the step (1), the washing water is evenly infiltrated into the laundry, so that in the subsequent first step, the agitation force is applied to the laundry so that the dirt is efficiently removed.

In the second step between the first steps, the washing water in which the detergent has been dissolved is washed by the centrifugal force generated by the rotation of the washing and dewatering tub 2 so that the washing water passes through the laundry. Acts on dirt. Further, in the second step, since no frictional force is directly applied to the laundry, the laundry is not damaged, the cleaning power can be secured, and the washing unevenness can be reduced.

(Embodiment 2) As shown in FIG. 6, the rotation detecting means 21 is constituted by a Hall IC or the like, and is attached to the motor 5. The load amount detecting means 22 is for detecting the amount of the laundry in the washing and dewatering tub 2. The output of the rotation detecting means 21 is inputted, and the motor 5 is loaded in the washing and dewatering tub 2. Then, the amount of the laundry in the washing and dewatering tub 2 is detected based on the degree of decrease in the rotation speed of the stirring blade 8 when the driving is stopped after the stirring blade 8 is driven.

The control means 23 receives the signal from the load amount detecting means 22, determines which of the plurality of washing water levels is to be set, and starts the first or second stroke after detecting the load amount. In this case, the rotation speed of the washing and dewatering tub 2 in the second step can be changed according to the output of the load amount detecting means. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. When the operation is started after the laundry and the detergent are put into the washing / dewatering tub 2, the motor 5 is operated by the control means 23 to agitate the agitating blades 8, and the laundry is agitated for a predetermined time T4. At this time, a signal generated by the rotation detecting unit 21 is sent to the load amount detecting unit 22, and the amount of the laundry in the washing and dewatering tub 2 is detected based on the signal.

After the load amount detecting means 22 detects the amount of the laundry, the control means 23 executes the second stroke after supplying water to the water level at the time of washing according to the amount of the laundry.

At this time, the number of revolutions of the washing and dewatering tub 2 in the second step is set by the load amount detecting means 22, so that the amount of the laundry having the rated capacity at the predetermined water level is stored in the washing and dewatering tub 2. The rotation speed set so that a predetermined amount of washing water is sprinkled is R2
If the amount of laundry is small in the same water level, the amount of washing water sprinkled into the washing and dewatering tub 2 is easy because the washing water in the washing and dewatering tub 2 easily passes through the laundry. , The washing water becomes excessively foamed, and the rotation speed R
Set 3 low.

Therefore, by rotating the washing and dewatering tub 2 at a predetermined water level at a rotation speed commensurate with the amount of the laundry, the excessive amount of washing water due to the amount of the laundry and the amount of water in the washing and dewatering tub 2 is increased. Can be suppressed, and the optimal dissolution of the detergent and the optimal spraying of the washing water can be performed. Therefore, the scattering of the washing water can be prevented, the power consumption can be reduced, and the temperature of the motor 5 can be prevented from rising.

After this second step (between T1 and T2),
From T2 to T3, the first step of stirring the laundry with the stirring blades 8 to remove dirt is performed.

(Embodiment 3) The control means 23 shown in FIG.
The times of the first stroke and the second stroke can be varied according to the output of the load amount detecting means 22. Other configurations are the same as those of the second embodiment.

The operation of the above configuration will be described with reference to FIGS. After detecting the amount of the laundry by the load amount detecting unit 22, the control unit 23 supplies the water to the water level at the time of washing according to the amount of the laundry, and then performs the second stroke and the first stroke.
Perform the steps of

At this time, when the amount of the laundry is large in the same water level, the mechanical force of the stirring blade 8 is difficult to be transmitted to the clothes in the first stroke, and in the second stroke, Since the amount of washing water sprinkled on the washing water decreases, the solubility of the detergent in the washing water tends to decrease. For this reason, when the amount of the laundry is large, as shown in FIG. 8, the operation times t1 and t2 of the first and second strokes are the first time when the amount of the laundry shown in FIG. And the operation times t1 'and t2' of the second stroke are set longer (t1> t1 ', t2>t2').

Therefore, by washing at the predetermined water level during the operation time of the first and second strokes corresponding to the amount of the laundry, the solubility of the detergent according to the amount of the laundry in the washing and dewatering tub 2 is improved. It is possible to prevent a decrease in washing performance due to a decrease in washing water concentration in the washing / dewatering tub 2 and an uneven concentration of the washing water in the washing / dewatering tub 2.

(Embodiment 4) The control means 23 shown in FIG.
According to the output of the load amount detecting means 22, the reversal time of the stirring blade 8 in the first stroke can be changed. Other configurations are the same as those of the third embodiment.

The operation of the above configuration will be described with reference to FIG. As shown in FIG. 10A, after the load amount detecting means 22 detects the amount of laundry, the control means 23
After water is supplied to the washing water level according to the amount of laundry,
Perform the second and first steps.

At this time, as shown in FIG. 10 (b), the reversal time of the stirring blade 8 suitable for stirring the amount of laundry having the rated capacity at a predetermined water level is set to H1 (for example, 2.0 seconds on). -1.0
When the amount of laundry is small in the same water level, the mechanical force of the stirring blade 8 is easily transmitted to the clothes in the first stroke, and the laundry is easily damaged. As shown in (2), the reversal time H2 of the stirring blade (for example, 1.0 second on-1.0 second off) is set weakly.

Therefore, the washing is performed at the predetermined water level during the reversal time of the stirring blade 8 in the first stroke corresponding to the amount of the laundry, and in the second stroke, the mechanical force for rotating the washing and dewatering tub 2 is obtained. Is not transmitted to the clothes, so that the laundry can be washed with an appropriate stirring force so as not to be significantly damaged.

(Embodiment 5) The control means 23 shown in FIG.
According to the output of the load amount detecting means 22, the reversing rotation speed of the stirring blade 8 in the first stroke and the rotation speed of the washing and dewatering tub 2 in the second stroke can be changed. The other configuration is the same as in the third embodiment.
Is the same as

The operation of the above configuration will be described with reference to FIG. As shown in FIG. 11 (a), after the load amount detecting means 22 detects the amount of laundry,
After water is supplied to the washing water level according to the amount of laundry,
Perform the second and first steps.

At this time, if the amount of laundry is large in the same water level, in the second step, the amount of washing water sprinkled into the washing and dewatering tub 2 is increased, as shown in FIG. In addition, the rotation speed R4 of the washing and dewatering tub 2 is set to be high, and in the first step, the mechanical force of the stirring blade 8 is not transmitted to the clothes in the upper laundry in the washing and dewatering tub 2; As shown in FIG. 11C, the rotation speed r1 of the stirring blade 8 is set high.

When the amount of laundry is small in the same water level, in the second step, the rotation speed R of the washing and dewatering tub 2 is reduced in order to prevent the laundry from being pressed against the inner surface of the washing and dewatering tub 2.
5 is set low, and in the first step, the mechanical force of the stirring blade 8 is easily transmitted to the clothes in the upper laundry in the washing and dewatering tub 2, and in the first step, the washing and dewatering of the laundry is performed. 2 Because there is little pressing of the laundry on the inner surface, the rotation speed of the stirring blade r2
Set low.

Therefore, the reversing rotation speed of the stirring blade 8 in the first stroke and the rotation speed of the washing and dewatering tub 2 in the second stroke can be made variable in accordance with the amount of the laundry at the predetermined water level. Suppress excessive bubbling of washing water due to the amount of laundry and the amount of water in the washing and spin-drying tub 2, and perform optimal detergent dissolution and optimal washing water sprinkling while using the optimal mechanical force that does not damage the laundry. The washing effect can be efficiently obtained, the washing time can be shortened, and the power consumption can be reduced.

(Embodiment 6) As shown in FIG. 12, the input setting means 24 has a dirt switch 25. By switching the dirt switch 25 in accordance with the amount of dirt on the laundry, the control means 26 has a dirt switch. Has an operation course for changing the ratio of the operation time of the first stroke to the operation time of the second stroke.
Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIG. By switching the dirt switch 25 in the input setting means 24 according to the amount of dirt on the laundry, the control means 26 supplies water to the water level at the time of washing according to the amount of laundry, and then performs the first and second strokes. Change the ratio of the operation time of the stroke.

At this time, the ratio A (A = t1 "/ t2") of the operation times t2 "and t1" of the second and first strokes is set by the dirt switch 25 in the input setting means 24. When the amount of dirt is large, the effect of the detergent of the washing water in the washing and dewatering tub 2 is reduced. Therefore, the ratio A1 of the first stroke is increased, and the cleaning effect with mechanical power is improved. Further, when the amount of dirt is small, the detergent of the washing water effectively acts on the laundry, so that the ratio A2 of the first stroke (that is, A2 <A1) is reduced, and the optimal mechanical force that does not damage the laundry. You can do the washing.

In this embodiment, the dirt on the laundry is determined by the input setting means 24 such as a switch in the first step and the second step.
Although the ratio of the operation time in the process (1) is changed, the same effect can be obtained by using a dirt detecting means such as an optical sensor.

(Embodiment 7) As shown in FIG. 14, the input setting means 27 has a cloth type switch 28, and by switching the cloth type switch 28 in accordance with the type of cloth of the laundry. The control means 29 also has an operation course for increasing the predetermined water level and changing the ratio of the operation time between the first stroke and the second stroke. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIGS. By switching the cloth type switch 28 in the input setting means 27 according to the type of the cloth of the laundry, the control means 29 can change the cloth type according to the type of the cloth of the laundry.
After the water level at the time of washing is higher than the set water level, the ratio of the operation time between the first and second strokes is changed.

At this time, the ratio A (A = t1 "/ t2") of the operation times t1 "and t2" of the first and second strokes is set by the cloth type switch 28 in the input setting means 27. Therefore, when the type of cloth is delicate as compared with the case of the normal cloth type shown in FIG. 15, the ratio A of the first stroke is reduced as shown in FIG. 16 in order to suppress the mechanical force transmitted to the laundry.
And raise the water level higher than the set water level (for example, 10
By setting to (mm higher), washing can be performed with a mechanical force that is gentle on clothes without damaging the laundry.

In this embodiment, the ratio of the operation time between the first and second strokes is changed and the predetermined water level is increased by the input setting means 27 such as a switch for the type of the laundry cloth. Although the configuration is made as described above, the same effect can be obtained by using a cloth detecting means such as a cloth sensor.

(Embodiment 8) Control means 29 shown in FIG.
Has an operation course in which the ratio of the operation time between the first step and the second step is changed and the predetermined water level is increased according to the type of the laundry, and the reversal time of the stirring blade 8 is suppressed. ing. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described with reference to FIGS. By switching the cloth type switch 28 in the input setting means 27 according to the type of the cloth of the laundry, the control means 29 controls the type of the cloth of the laundry in accordance with the type of the cloth of the laundry as compared with the case of the normal cloth type shown in FIG. When the type of the cloth is delicate, as shown in FIG. 18, after the water level at the time of washing is higher than the set water level (for example, 10 mm higher), the operation time of the first and second strokes is reduced. While changing the ratio, the reversal time H of the stirring blade 8 was set to a weaker value, and the suppressed water flow (for example, from 1.0 second on-0.6 second off to 0.8 second).
Seconds on-0.8 seconds off).

At this time, the ratio A (A = t1 / t2 ") of the operation times t1" and t2 "of the first and second strokes is set by the cloth type switch 28 in the input setting means 27. Therefore, when the type of the cloth is easily damaged or delicate (for example, a blouse), the ratio A of the first stroke is reduced and the reversal time of the stirring blade 8 is weakened in order to suppress the mechanical force transmitted to the laundry. By changing the water level to a higher level, the laundry can be washed with a mechanical force that is gentle on the clothes without damaging the laundry. it can.

In this embodiment, the type of laundry is changed by the input setting means 27 such as a switch to change the ratio of the operation time between the first and second strokes so as to increase the predetermined water level. However, the same effect can be obtained by using a cloth detecting means such as a cloth sensor.

[0067]

As described above, according to the first aspect of the present invention, the washing and dewatering tub provided rotatably in the outer tub and the inner bottom of the washing and dewatering tub are rotatably provided. The operation of the provided stirring blade, water supply means for supplying water into the washing and dewatering tub, driving means for driving the washing and dewatering tub or the stirring blade, and the operation of the water supply means and the driving means are controlled to control the stroke. Control means, wherein at least one of before and during the first step of rotating the stirring blade at a predetermined water level, or during the first step, the outer tub and the washing tub are rotated by rotating the washing and dewatering tub. Since the second step of sprinkling the washing water into the washing and dewatering tub from between the dewatering tub is performed, the solubility of the detergent and the washing to the laundry are more improved than the washing step only by the stirring blade. In addition to improving water penetration, washing and dewatering The concentration of the washing water can be made uniform, it is possible to act on the dirt effectively laundry wash water, thereby reducing the washing unevenness.

According to the second aspect of the present invention, there is provided a load amount detecting means for detecting the amount of the laundry in the washing and dewatering tub, and the control means responds to the output of the load amount detecting means. Since the number of rotations of the washing and dewatering tub in the second step is variable, excessive washing water bubbling due to the amount of laundry in the washing and dewatering tub and the amount of water is suppressed, and optimal detergent dissolution is achieved. In addition, optimal washing water can be sprinkled, and effective washing can be performed.

According to the third aspect of the present invention, the control means can change the time of the first and second strokes in accordance with the output of the load detection means. Deterioration of detergent solubility and uneven washing water concentration in the washing and spin-drying tub can be prevented by the amount of laundry in the spin-drying tub, ensuring washing power and reducing uneven washing. it can.

According to the fourth aspect of the present invention, the control means can change the reversal time of the stirring blade in the first stroke in accordance with the output of the load amount detecting means. According to the amount of the laundry in the tub, the cleaning effect can be obtained with the optimal mechanical force that does not damage the laundry, and it is possible to improve the damage to the cloth, secure the cleaning power, and reduce the washing unevenness.

According to the fifth aspect of the present invention, the control means is responsive to the output of the load amount detecting means for inverting the rotation speed of the stirring blades in the first stroke and for washing and unloading in the second stroke. The rotation speed of the water tub is variable so that excessive washing water is prevented from foaming due to the amount of laundry in the washing and dewatering tub and the amount of water, and optimal detergent dissolution and optimal washing water sprinkling are achieved. Since the washing effect can be obtained with the optimal mechanical force that does not damage the laundry, the washing time can be reduced and the power consumption can be reduced.

Further, according to the invention described in claim 6, the control means sets the driving course for changing the ratio of the driving time of the first step and the driving time of the second step in accordance with the amount of dirt on the laundry. Since it has both functions, it is possible to obtain a cleaning effect on a less-stained object without damaging the cloth with an optimal mechanical force that does not damage the laundry.

According to the present invention, the control means changes the ratio of the operation time between the first and second strokes and sets the predetermined water level in accordance with the type of the laundry cloth. With a driving course that changes to a higher level, wash delicate clothes that are easily damaged with the optimal mechanical power that does not damage the laundry and at a water level higher than the predetermined water level where mechanical power is difficult to transmit without damaging the cloth An effect can be obtained, and washing can be performed with a mechanical force that is gentle on clothes.

According to the eighth aspect of the present invention, the control means changes the ratio of the operation time between the first and second strokes and sets the predetermined water level in accordance with the type of the laundry cloth. In addition to a higher operating level, the oscillating blades also have an operation course that minimizes the reversal time of the agitating blades, so that in delicate clothes that are easily damaged, the optimal mechanical power that does not damage the laundry is higher than the predetermined water level where mechanical power is difficult to transmit. At the water level, the cleaning effect can be obtained without damaging the cloth and minimizing the entanglement of the cloth.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a washing machine according to a first embodiment of the present invention.

FIG. 2 is a block circuit diagram of the washing machine.

FIG. 3 is an operation time chart of main parts of the washing machine.

FIG. 4 is a longitudinal sectional view showing an operation state of the washing machine in a second stroke.

FIG. 5 is a longitudinal sectional view showing an operation state of the washing machine in a first stroke.

FIG. 6 is a block circuit diagram of a washing machine according to a second embodiment of the present invention.

FIG. 7 is an operation time chart of main parts of the washing machine.

FIG. 8 is an operation time chart of main parts of the washing machine according to the third embodiment of the present invention when the amount of laundry is large.

FIG. 9 is an operation time chart of main parts when the amount of laundry of the washing machine is large.

FIG. 10 is an operation time chart of a main part of a washing machine according to a fourth embodiment of the present invention.

FIG. 11 is an operation time chart of main parts of a washing machine according to a fifth embodiment of the present invention.

FIG. 12 is a block circuit diagram of a washing machine according to a sixth embodiment of the present invention.

FIG. 13 is an operation time chart of main parts of the washing machine.

FIG. 14 is a block circuit diagram of a washing machine according to a seventh embodiment of the present invention.

FIG. 15 is an operation time chart of main parts of the washing machine in the case of a normal cloth type.

FIG. 16 is an operation time chart of main parts when the type of cloth of the washing machine is delicate.

FIG. 17 is an operation time chart of main parts of a washing machine according to an eighth embodiment of the present invention in the case of a normal cloth type;

FIG. 18 is a main part operation time chart when the type of cloth of the washing machine is delicate.

FIG. 19 is a longitudinal sectional view of a conventional washing machine.

[Explanation of symbols]

 Reference Signs List 1 outer tub 2 washing and dewatering tub 5 motor (drive means) 8 stirring blade 10 water supply valve (water supply means) 14 control means

 ──────────────────────────────────────────────────続 き Continued from the front page (72) Inventor Hiroyuki Fujii 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (8)

[Claims] 1. A washing and dewatering tub rotatably provided in an outer tub, a stirring blade rotatably provided at an inner bottom portion of the washing and dewatering tub, and a water supply means for supplying water to the washing and dewatering tub. A driving unit for driving the washing and dewatering tub or the stirring blade, and a control unit for controlling operations of the water supply unit and the driving unit to control a stroke, and the control unit controls the stirring blade at a predetermined water level. Before the first step of rotating or at least one between the first steps, the washing and dewatering tub is sprinkled with washing water from between the outer tub and the washing and dewatering tub into the washing and dewatering tub by rotation of the washing and dewatering tub. A washing machine that performs the second step. 2. A washing and dewatering tub for a second stroke in accordance with an output of the load amount detecting means, comprising: a load amount detecting means for detecting an amount of laundry in the washing and dewatering tub. The washing machine according to claim 1, wherein the number of rotations of the washing machine is variable. 3. The washing machine according to claim 1, wherein the control means is capable of changing the times of the first and second strokes according to the output of the load amount detecting means. 4. The washing machine according to claim 1, wherein the control means is capable of changing a reversal time of the stirring blade in the first stroke according to an output of the load amount detecting means. 5. The control device according to claim 1, wherein the rotation speed of the stirring blade in the first stroke and the rotation speed of the washing and dewatering tub in the second stroke can be varied in accordance with the output of the load amount detection device. 1 to
4. The washing machine according to any one of 3. 6. The washing machine according to claim 1, wherein the control means also has an operation course for changing a ratio of an operation time between the first step and the second step according to an amount of dirt on the laundry. 7. The control means according to claim 1, further comprising an operation course for changing the ratio of the operation time between the first step and the second step and changing the predetermined water level higher according to the type of the laundry cloth. The washing machine according to 1. 8. The control means changes the ratio of the operation time of the first stroke and the operation time of the second stroke and increases the predetermined water level in accordance with the type of the cloth of the laundry, and sets the reversal time of the stirring blade. 2. The washing machine according to claim 1, wherein the washing machine has a reduced driving course.