JP3186364B2 - Fully automatic 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 pulsator-type fully automatic washing machine for washing clothes by circulating a washing liquid from an upper portion to a lower portion of a washing and dewatering tub.

[0002]

2. Description of the Related Art In recent years, protection of the global environment has become a very important issue. Resource saving is also an important theme among them, and in washing machines, water saving and detergent saving are strongly desired.

Various methods have been proposed for water saving and detergent. For example, as shown in JP-A-62-304816, a waterway forming cover is provided on a part of the inner wall of a washing tub to form a waterway between the washing tub and a lower blade of a pulsator. There is a washing method in which the washing liquid at the lower side of the washing tub is guided to the upper part of the washing tub through a water channel by the pump action of the washing tub and poured onto the laundry. According to this method, since the washing liquid is constantly poured into the laundry, washing can be sufficiently performed even if the water level at the time of washing is slightly low, and water saving and detergent saving are possible.

[0004]

However, the method described in Japanese Patent Application Laid-Open No. Sho 62-304816 has a problem that a large amount of washing liquid cannot always be poured onto laundry from above.

As shown in FIG. 15, the inventors rotatably arrange the pump chamber 37 on the bottom surface of a washing and dewatering tub 34 and mount a pump chamber 37 on the outer periphery of a lower blade 36 of a pulsator 35 driven by a motor. The washing and dewatering tub 34 is formed from the pump chamber 37.
A water passage 38 communicates with the upper portion of the washing and dewatering tub 34, and an upper portion of the water passage 38 is opened toward the inside of the washing and dewatering tub 34, and a watering nozzle 39 is provided. We have studied various types of fully automatic washing machines that improve the solubility and circulation effect of detergent by circulating a large amount of washing liquid into the laundry from above.

As a result, the washing and dewatering tub 34 and the water receiving tub 4
In order to further circulate the washing liquid between 0 and 0, as shown in FIG. 15, the generation of bubbles 41 between the washing and dewatering tub 34 and the water receiving tub 40 increases, and There was a danger that it would come out from the upper surface of the receiving tank 40. That is, since the water flow is constant in the case of the conventional water flow, as shown in FIG. 16, the time required to reach the upper surface of the fluid balancer 42 (assuming the upper limit of the airframe to be safe) as shown in FIG. However, during washing, the foam 41 passed over the upper surface of the fluid balancer 42, dripped on the floor surface, and spilled on other electronic components, causing a problem in safety. Further, there is a problem that the acceleration of foam differs depending on the amount of laundry and the water level.

The present invention has been made to solve the above-mentioned problems, and suppresses the acceleration of bubbles at each water level while preventing the splash of washing liquid and bubbles while increasing the amount of circulating water of washing liquid.
It is a first object of the present invention to improve the detergency by pouring a washing liquid into laundry during strong water flow and rubbing and washing during weak water flow, and to suppress damage to cloth and entanglement of cloth.

It is a second object of the present invention to enable the washing liquid to be sufficiently poured from above when washing a small amount of laundry even when the water level is low, and to prevent splashing of bubbles.

[0009] Further, by pouring the washing liquid into the laundry from above almost continuously, it is possible to prevent the user from having a distrust.
The purpose is.

A fourth object of the present invention is to prevent the splashing of the washing liquid and the foam without any trouble for the user by detecting the load amount and automatically selecting the water flow.

A fifth object of the present invention is to make it possible to automatically select a water flow using a water flow that is not unnatural for washing even when water is contained in the washing and dewatering tub.

[0012]

In order to achieve the first object, the present invention provides a pulsator rotatably disposed on the bottom of a washing and dewatering tub, a motor for driving the pulsator, A pump chamber formed on the outer periphery of the lower blade of the pulsator, a plurality of independent water passages communicating from the pump chamber to the top of the washing and dewatering tub, and an upper part of the plurality of water passages inside the washing and dewatering tub. An opening opening toward the opening, a watering nozzle provided in the opening, a water level detecting means for detecting a water supply water level of the washing and dewatering tub, and controlling a reversal time and energization of the motor to generate a water flow. Control means for controlling the strong water flow and the weak water flow with respect to time.
And a plurality of combined water streams are provided for each water supply level of the washing and dewatering tub.
The lower the load, the smaller the strong water flow and weak water flow
The first problem solving means is that one of the water flows is weakened .

[0013] In order to achieve the second object, the control means of the first means for solving the problem can discharge the washing liquid from the watering nozzle at the time of the next turn-off time of the reversal time in the combined water flow. Making the time shorter than the time is a second problem solving means.

Further, in order to achieve the third object, the control means of the first means for solving the problems described above is characterized in that the left and right reversal of the strong water flow and the weak water flow are each one unit, and an integral multiple of each unit is combined. The third problem solving means is to form a composite water flow.

Further, in order to achieve the fourth object, in addition to the first means for solving the above-mentioned problems, a back electromotive force of the motor during a suspension period after the motor has been energized for a predetermined time is used. A fourth problem solving means is provided with a load amount detecting means for detecting a load amount, wherein the control means selects a feed water level and a water flow before water supply based on an output of the load amount detecting means.

Further, in order to achieve the fifth object, in addition to the first to third means for solving the above problems, in addition to the water supply to the washing and spin-drying tub, the motor is energized for a predetermined period of time, and the power is supplied to the motor during a rest period. Fifthly, a load detecting means for detecting a load amount in the washing and dewatering tub by a back electromotive force of the motor is provided, and the control means selects a water flow based on a detected water flow of the load amount detecting means. It is a means to solve the problem.

[0017]

According to the first aspect of the present invention, there is provided:
Increase the circulating water volume of the washing liquid with the strong water flow of the composite water flow,
In addition, the acceleration of foam is suppressed at each water level with a weak water flow, it can prevent the splash of washing liquid and foam, and furthermore, the idea of washing the washing board can be taken in, the washing liquid can be poured enough into the laundry at the time of strong water flow, The washing water can be rubbed and washed at the time of weak water flow to improve the detergency, and since there is a weak water flow, the damage to the cloth and the entanglement of the cloth can be suppressed as compared with the conventional fixed reversal time.

Further, according to the second means for solving the problems, when washing a small amount of laundry, it is possible to pour the washing liquid from the top even if the water level is low, and sufficient lint water is also supplied to the lint filter. Because of the flow, lint trapping efficiency can be improved, and furthermore, it is possible to prevent splashing of bubbles.

Further, the washing liquid can be poured almost continuously from above into the laundry by the third means for solving the problem, and the user is not suspicious of uneven washing because the laundry is not always soaked in the washing liquid. You will be able to wash without giving a feeling.

Further, according to the fourth means for solving the problem, the water flow can be automatically selected for each load amount, and the load amount can be detected by detecting the load amount even for large clothing such as towel sheets, which is a factor of foam jumping. In addition, it is possible to prevent the washing liquid and the foam from splashing without any trouble for the user.

Further, according to the fifth problem solving means, even when the remaining hot water of the bath, which cannot detect the load amount before supplying water, is used, the load amount is automatically detected by a water flow which is not unnatural for washing. And water flow can be selected.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

As shown in the drawing, the outer frame 1 of the washing machine has a water receiving tub 3 suspended by a suspension rod 2 inside. A washing and dewatering tub (hereinafter referred to as a washing tub) 4 is mounted in the water receiving tub 3, and a circulating water channel cover 5 is mounted on the inner surface thereof to form circulating water channels 6 a and 6 b with the washing tub 4. The pulsator 7 is rotatably disposed at the bottom of the washing tub 4, and the lower blade 8 is integrally provided on the back surface of the pulsator 7, and a pump chamber 9 is formed on the outer periphery of the lower blade 8. Pump room 9
Is provided with a watering nozzle 11 and a lint filter 12 at an opening 10 in the upper part of the washing tub 4 toward the inside of the washing tub 4 in communication with the circulation water passages 6a and 6b.

The motor 13 drives the pulsator 7 via a V-belt 14 and a speed reduction mechanism 15. The operation control device 16 controls the reversal time and energization of the motor 13. 17 is a drain valve, 18 is a water supply valve, 19 is a lid, 20
Is a fluid balancer for reducing vibration during dehydration.

The operation control device 19 is configured as shown in FIG. 2. The voltage detecting means 21 detects the back electromotive force during the inertial rotation of the motor 13 and outputs the output to the load amount detecting means 22. input. The load amount detecting means 22 detects the amount of the laundry 23 in the washing tub 4 from the output of the voltage detecting means 21, and inputs the output to the control means 24. The power switching means 25 outputs the motor 1
3. Control the energization of the drain valve 17, water supply valve 18 and the like. The operation display means 26 is operated by a user to input a desired input and to display an operation state. The water level detecting means 27 detects the water level in the washing tub 4.

The control means 24 controls the reversal time and energization of the motor 13 and sequentially controls the washing, rinsing, and dehydrating processes based on the outputs of the operation display means 26, the water level detecting means 27 and the like. Further, the control unit 24 includes a storage unit 28
Of the pulsator 7 can be controlled based on the stored content of the pulsator 7 so that the strength of the water flow can be generated, and a combined water flow is formed by a combination of the strength of the water flow.
The strong water flow and the weak water flow are combined for each time for each water supply level.

That is, as shown in FIGS. 3, 4 and (Table 1), the control means 24 changes the water flow into a strong water flow (NO. 1 water flow) and a weak water flow (NO. .2 water flow) for each time to form a composite water flow, and multiple water flows are provided for each water level.
FIG. 3 is a basic pattern diagram of the water flow, FIG. 4 is a detailed view of the right and left rotation of the water flow, and (Table 1) shows the left and right on-off time periods of the present embodiment.

[0028]

[Table 1]

The strong water flow (NO.1 water flow) secures the amount of the shower poured from the watering nozzle 11, sufficiently immerses the washing liquid in the upper laundry, improves the movement of the laundry 23, and improves the weak water flow ( NO.2 water flow) suppresses the development of foam,
It is a water current that has the effect of massaging 3. Here, in Table 1, a plurality of composite water flows are provided for each water level. However, the speed of the foam varies depending on the load within each water level, and the speed increases as the load decreases. The water flow gradually weakens as the load decreases. Reference numeral 29 denotes a phase advance capacitor of the motor 13, reference numeral 30 denotes a power switch, and reference numeral 31 denotes a commercial power supply.

The operation of the above construction will be described. First, as shown in FIG. 1, a laundry 23 is put into the washing tub 4 and a start switch (not shown) is pressed. The amount of the laundry 23 in the tub 4 is detected, and a water level and a water flow corresponding to the load amount are determined.
8 is controlled to supply water to a predetermined water level, and the washing process is started. When the washing process is started, the motor 13 is controlled by the control means 24 to rotate clockwise / pause / counterclockwise / pause according to the washing water flow.

The controlled rotation of the motor 13 is transmitted to the pulsator 7 via the V-belt 11 and the speed reduction mechanism 15. Therefore, the pulsator 7 and the lower blade 8 rotate in response to the rotation of the motor 13, and the laundry 21 and the washing liquid in the washing tub 4 are agitated to wash the laundry 21. On the other hand, the washing liquid between the lower blade 8 and the water receiving tub 3 is
It is pushed outward by centrifugal force due to the rotation of the lower blade 8, and is intermittently poured into the washing tub 4 from the lint filter 12 and the watering nozzle 11 through the circulation channels 6 a and 6 b according to the rotation of the motor 13. It is.

Fresh washing liquid is supplied to the trace of the washing liquid pushed out to the circulation channels 6a and 6b by the lower blade 8, from below the center of the lower blade 8. That is, the washing liquid between the water receiving tub 3 and the washing tub 4 is supplied, and the liquid level a between the water receiving tub 3 and the washing tub 4 is lower than the washing liquid level b in the washing tub 4. Become. However, since the washing liquid flows into the water receiving tub 3 through a dehydrating hole (not shown) of the washing tub 4 and a gap between the washing tub 4 and the pulsator 7, the difference in the liquid level is balanced by a certain value. It will be constant. In addition, by providing four or six circulation channels, the washing liquid pushed out by the centrifugal force of the lower blade 8 can be efficiently guided to the circulation channels, and the total circulation flow rate can be increased.

FIG. 5 shows the detergent (surfactant) dissolution characteristics according to the present embodiment and conventional characteristics. In the figure, curve A is the detergent dissolution characteristic according to the present embodiment, and curve B is the conventional characteristic. By increasing the circulation flow rate of the washing liquid in this manner, the detergent dissolving characteristics can be significantly improved.

Next, the cleaning characteristics of this embodiment and the conventional characteristics are shown in comparison with FIG. In the figure, a characteristic A is a cleaning rate according to the present embodiment, and B is a conventional cleaning rate. As described above, according to the present embodiment, it is possible to greatly improve the cleaning performance by improving the above-described detergent (surfactant) dissolving characteristics and the shower effect and circulation effect of the washing liquid.

That is, the control means 24 forms a complex water stream in which a strong water stream (NO. 1 water stream) and a weak water stream (NO. 2 water stream) are combined at every time, whereby the strong water stream (NO. 1 water stream) is formed. ), It is possible to secure the amount of the shower poured from the watering nozzle 11, sufficiently immerse the washing liquid in the upper laundry, and improve the movement of the laundry 23 so that the washing effect is not impaired. (No. 2 water flow), the effect of suppressing the development of foam and rubbing the laundry 23 can be obtained.

As a result, as shown in FIG. 7, it is possible to suppress the bubble speed to a certain constant value, so that bubbles do not come out from the upper surface of the water receiving tank 3, and the cleaning effect and the shower efficiency are also reduced. It can be washed without spoiling. In addition, since there is a weak water flow (NO.2 water flow), it is possible to suppress entanglement and damage, and it is possible to suppress entanglement of the fabric that has been damaged.

Next, a second embodiment of the present invention will be described. The control means 24 in FIG. 2 sets the off time of the reversal time in the combined water flow to be shorter than the time during which the washing liquid can be discharged from the watering nozzle 11 at the next on. That is, as shown in (Table 1), at a low water level, the off time of the reversal time in the combined water flow is controlled from 0.4 seconds to 0.8 seconds. Other configurations are the same as those of the first embodiment.

The operation of the above configuration will be described.
As shown in FIG. 5, in the case of the low water level, since the height difference from the washing liquid level b to the sprinkling nozzle 11 is large, the washing liquid between the lower blade 8 and the water receiving tub 3 is turned on when the reversal time of the water flow is on. It is pushed outward by centrifugal force due to the rotation of the lower blade 8 and is poured into the washing tub 4 from the lint filter 12 and the water spray nozzle 11 through the circulation water passages 6a and 6b according to the rotation of the motor 13, but the water flow is reversed. If the off-time of the time period is long, the water level in the circulation waterways 6a and 6b drops, and in the case of a low water level, the on-time of the reversal time of the water flow for suppressing the bubble speed and the bounce of bubbles is short. When the water flow reversal time is ON, the water levels in the circulation waterways 6a and 6b cannot be easily raised. Therefore, the off-time is reduced from 0.4 seconds to 0.4 seconds.
By suppressing it to 8 seconds, it is possible to suppress the lowering of the water level in the circulating water passages 6a and 6b, make it possible to supply the washing liquid from the watering nozzle 11 effectively, and to allow sufficient circulating water to flow into the lint filter 12. Therefore, even at a low water level, the shower effect and the circulation effect can be improved, and the cleaning effect and the lint performance can be improved.

Next, a third embodiment of the present invention will be described. As shown in FIG. 8, the control means 24 in FIG. 2 generates a composite water flow in which a strong water flow (NO. 1 water flow) and a weak water flow (NO. 2 water flow) are combined at a ratio of 1: 2 for each left-right inversion. I am trying to do it. Other configurations are the same as those of the first embodiment.

The operation of the above configuration will be described. By combining a strong water flow (NO. 1 water flow) and a weak water flow (NO. 2 water flow) at a ratio of 1: 2 for each left-right inversion, a composite water flow is obtained. 7, the acceleration of the foam can be suppressed, and the washing liquid can be almost continuously poured into the laundry from the watering nozzle 11, so that the washing liquid is always applied to the laundry. Thus, washing can be performed without giving the user a feeling of distrust of uneven washing.

In this embodiment, the ratio of the strong water flow to the weak water flow is 1: 2, but the ratio is not limited to this, and the washing liquid bubbles overflow from the water receiving tub 3 by the end of the washing. Needless to say, a ratio that does not appear may be sufficient.

Next, a fourth embodiment of the present invention will be described. The control means 24 in FIG. 2 selects a water supply water level and a water flow before water supply by the output of the load amount detection means 22. Other configurations are the same as those of the first embodiment.

The operation of the above configuration will be described. The load amount detecting means 22 receives the output of the voltage detecting means 21 and
The amount of load in the washing tub 4 is detected based on the decay rate of the back electromotive force of the motor 13 during the suspension period after the motor 13 is energized for the required time. That is, the terminal voltage of the capacitor 29 has a correlation with the rotation speed of the motor 13, and the terminal voltage of the capacitor 29 is attenuated in accordance with the rotation speed of the motor 13 during a pause before turning the motor 13 on and then reversing the rotation. I do. This back electromotive force decreases as the rotational speed decreases, and has a waveform as shown in FIGS. 9 (a) and 9 (b). FIG. 9A shows a case where the load is small and the rotation speed of the motor 13 is small, and FIG. 9B shows a case where the load amount is large and the rotation speed of the motor 13 rapidly decreases. At this time, since the terminal voltage of the capacitor 29 also decreases, a load amount such as a cloth amount can be detected. That is, the load amount is detected by measuring the decay time of the capacitor voltage (T1a, T1b in FIG. 9), the change rate of the capacitor voltage, or the decay rate such as the number of voltage waveforms.

When the laundry 23 is put into the washing tub 4, the power switch 30 is turned on, and a start switch (not shown) is pressed, the pulsator 7 is repeatedly rotated left and right by the motor 13 a plurality of times. The motor 13 in the idle period during the left-right reversal
10, the terminal voltage decreases when the load is large, and conversely, the terminal voltage increases when the load is small, as shown in FIG. The load amount is determined based on the terminal voltage, and the washing liquid level b is set.

Further, as described in the first embodiment, since the foam speed is different for each load amount in each water level, FIG.
As shown at 0, a plurality of water flows corresponding to the load amount are provided within each water level. This makes it possible to automatically select a water flow according to the load of large clothing such as towel sheets, which is a factor of foam jumping and jumping and foam acceleration, and the user can use the washing liquid without any trouble. The selection can be realized while suppressing the jumping of the bubbles and the progress of the bubbles.

Next, a fifth embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the figure, the load amount detecting means 32
After supplying water to the washing tub 4, the amount of load in the washing tub 4 is detected by the back electromotive force of the motor 13 during a rest period after the motor 13 is energized for a predetermined time. The control unit 33 includes the load amount detection unit 3
The water flow is selected in the detected water flow of No. 1.

That is, by the control means 33, FIG.
As shown in FIG. 13 and (Table 2), the strong water flow (NO.
The detected water flow is provided before the composite water flow in which the water flow) and the weak water flow (NO.2 water flow) are combined with each other, and the amount of laundry in the washing tub 4 is detected by the load amount detecting means 31 with the detected water flow. Like that. FIG. 12 is a basic pattern diagram of the water flow, FIG. 13 is a detailed view of the horizontal rotation of the water flow, and (Table 2)
The left-right on-off time limit of the present embodiment is shown.

[0049]

[Table 2]

The operation will be described in the above configuration. When the load amount cannot be detected before supplying water, for example, when the remaining hot water in the bath is used, the user sets the washing liquid level b by himself. Unless the water flow is set according to the load amount at the set water level, it is impossible to suppress the jumping of the foam and the development of the foam.

Therefore, as shown in the basic pattern of the water flow shown in FIG. 12, before the composite water flow for each water level, a plurality of times, for example, by a water flow of 1 second on-0.6 seconds off, as a detected water flow. It is possible to detect the load amount by integrating the back electromotive force when it is off for 0.6 seconds, and as shown in FIG. 14, the load is automatically set with a water flow that is not unnatural for washing within the set water level. The amount of water can be detected and the water flow can be selected, so that even if there is water in the washing tub before the washing or the user sets the water level by himself / herself, the jumping of the foam and the development of the foam can be automatically suppressed.

[0052]

As is apparent from the above embodiment, according to the present invention, a pulsator rotatably disposed on the bottom of the washing and dewatering tub, a motor for driving the pulsator,
A pump chamber formed on the outer periphery of the lower blade of the pulsator, a plurality of independent water passages communicating from the pump chamber to an upper portion of the washing and dewatering tub, and an upper portion of the plurality of water passages of the washing and dewatering tub. An opening opening toward the inside, a watering nozzle provided in the opening, a water level detecting means for detecting a water supply water level of the washing and dewatering tub, and controlling a reversal time and energization of the motor to generate a water flow. and control means for controlling said control means, the strength with pairs <br/> form only combined composite water per the water flow and Gentle time, for each water supply level of the washing and dewatering tank Providing multiple combined water flows ,
Is smaller, the strong water flow and / or the weak water flow
Since the water flow on the other hand is weakened , the cleaning performance can be greatly improved by improving the detergent (surfactant) dissolving properties, showering effect and circulating effect of the washing liquid, and using multiple strong water flows for each water level. By providing a composite stream of weak water flow, the acceleration of foam can be suppressed for each water level, preventing splashing of washing liquid and foam, further pouring the washing liquid to the laundry at strong water flow, and rubbing and washing at weak water flow As a result, the cleaning power can be improved, and the damage to the cloth and the entanglement of the cloth can be suppressed.

Further, the control means sets the off time of the reversal time in the combined water flow to be shorter than the time in which the washing liquid can be discharged from the sprinkling nozzle at the next on, so that the water level in the circulation channel at the time of the off is greatly reduced. Because there is no, it is possible to effectively pour the washing liquid from the top of the watering nozzle,
Since sufficient circulating water flows through the lint filter, lint promotion efficiency can be improved.

Further, since the control means sets the left and right reversal of the strong water flow and the weak water flow as one unit and combines an integral multiple of each unit to form a composite water flow, the washing liquid is applied to the laundry from above. It is possible to pour substantially continuously, and the washing can be completed without giving the user distrust of the uneven washing.

The washing machine further includes a load amount detecting means for detecting a load amount in the washing and dewatering tub by a back electromotive force of the motor during a suspension period after the motor is energized for a predetermined time, and the control means includes a load amount detecting means. The water supply level and the water flow are selected before water supply by the output of the water supply, so the water flow can be automatically selected according to the load of large clothing such as towel sheets, which is a factor of foam jumping, and it takes time for the user Without splashing, it is possible to prevent splashing of washing liquid and bubbles during washing.

Further, after water is supplied to the washing and dewatering tub, a load amount detecting means for detecting a load amount in the washing and dewatering tub by a back electromotive force of the motor during a rest period after the motor is energized for a predetermined time is provided. Since the means selects the water flow based on the detected water flow of the load amount detecting means, the load amount is detected by integrating the back electromotive force when the detected water flow provided for each water level is turned off before the combined water flow. Even when the remaining hot water in the bath is used (when the washing tub is filled with water), the load can be automatically detected with a stream that is not unnatural for washing, Water washing is possible even at the set water level.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of the fully automatic washing machine.

FIG. 3 is a basic pattern diagram of a water flow of the fully automatic washing machine.

FIG. 4 is an on-off pattern diagram of a water flow of the fully automatic washing machine.

FIG. 5 is a view showing a detergent dissolution characteristic of the fully automatic washing machine.

FIG. 6 is a view showing cleaning characteristics of the fully automatic washing machine.

FIG. 7 is a diagram showing operation time and foam height of the fully automatic washing machine.

FIG. 8 is an on-off pattern diagram of a water flow of a fully automatic washing machine according to a third embodiment of the present invention.

FIGS. 9 (a) and 9 (b) are voltage waveform charts applied to a motor when determining a load amount of a fully automatic washing machine according to a fourth embodiment of the present invention.

FIG. 10 is a diagram showing a correlation between a motor terminal voltage and a load amount in the load amount detection of the fully automatic washing machine.

FIG. 11 is a block diagram of a fully automatic washing machine according to a fifth embodiment of the present invention.

FIG. 12 is a basic pattern diagram of a water flow of the fully automatic washing machine.

FIG. 13 is an on-off pattern diagram of a water flow of the fully automatic washing machine.

FIG. 14 is a diagram showing a correlation between a terminal voltage of the motor and a load amount in the load amount detection of the fully automatic washing machine.

FIG. 15 is a diagram showing a state of foam in an operating state of a conventional fully automatic washing machine.

FIG. 16 is a diagram showing operation time and foam height of the fully automatic washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 Washing and dewatering tank 6a Water path 6b Water path 7 Pulsator 8 Lower blade 9 Pump room 10 Opening 11 Watering nozzle 12 Lint filter 13 Motor 24 Control means

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Midai Daikita 1006 Kazuma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-117999 (JP, A) JP-A-60- 90596 (JP, A) JP-A-5-208090 (JP, A) JP-A-60-29196 (JP, A) JP-A-6-1222697 (JP, A) JP-A-1-76780 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) D06F 33/02 D06F 39/08 331

Claims (5)

(57) [Claims] 1. A pulsator rotatably disposed on the bottom of a washing and dewatering tub, a motor for driving the pulsator, a pump chamber formed on the outer periphery of lower blades of the pulsator, and the pump chamber A plurality of independent water passages communicating with the upper portion of the washing and dewatering tub, an opening in which the upper portions of the plurality of water passages are opened toward the inside of the washing and dewatering tub, and a watering nozzle provided in the opening Water level detecting means for detecting a water level of water supplied to the washing and dewatering tub, and control means for controlling a reversal time and energization of the motor to control water flow generation, wherein the control means comprises a strong water flow and a weak water flow. to form a composite flow which combines <br/> bets for each time, a plurality of composite flow for each water supply level of the washing and dewatering tank, load
The smaller the volume, the stronger and / or weaker the stream
Fully automatic washing machine with weakened water flow . 2. The fully automatic washing machine according to claim 1, wherein the control means sets the off time of the reversal time in the combined water flow to be shorter than the time in which the washing liquid can be discharged from the watering nozzle at the next on time. 3. The fully automatic washing machine according to claim 1, wherein the control means sets the left and right reversal of the strong water flow and the weak water flow as one unit, and forms an integrated water flow by combining an integral multiple of each unit. 4. A load amount detecting means for detecting a load amount in the washing and dewatering tub by a back electromotive force of the motor during a rest period after the motor is energized for a predetermined time, wherein the control means includes a load amount detecting means. The fully automatic washing machine according to any one of claims 1 to 3, wherein a water supply water level and a water flow are selected before water supply according to the output of (1). 5. A load / amount detecting means for detecting a load in the washing and dewatering tub by a back electromotive force of the motor during a suspension period after supplying power to the motor for a predetermined time after supplying water to the washing and dehydrating tub. The fully automatic washing machine according to any one of claims 1 to 3, wherein the means selects a water flow based on a water flow detected by the load amount detecting means.