JP3131861B2 - Washing method of electric 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 washing method for an electric washing machine.

[0002]

2. Description of the Related Art FIGS. 18 to 20 are explanatory views of the structure of a conventional electric washing machine. FIGS.
-54113 and JP-A-4-84793. In FIG. 18, reference numeral 50 denotes an outer plate of the main body;
Is a washing tub (dehydration tub), 52 is a dehydration hole, and 53 is a stirring blade. The bottom plate of the washing tub 51 is formed with a concave portion protruding downward, and a stirring blade 53 is disposed in the concave portion. 54 is a water receiving tank, 55 is a motor, 56 and 57 are pulleys, 58 is a belt, and 59 is a speed reduction mechanism. The rotational force of the motor 55 is reduced by the reduction mechanism 59 via the pulley 56, the belt 58, and the pulley 57, and transmitted to the stirring blade 53.

FIG. 19A shows a stirring blade, b shows a washing tub, and c shows a bottom surface. In the washing machine of FIG. 19 as well, a concave portion protruding downward is formed on the bottom plate of the washing tub b, and the stirring blade a is arranged at a corresponding position on the concave portion.

[0004] Further, in FIG.
Is a water receiving tank, 62 is a rotating tank, 63 is a stirring body, 64 is a motor, 65 is a mechanism, 66 is a drain valve, 67 is an air trap, 68 is an air tube, 69 is a water level sensor, 70 is a water supply valve, 71 is The upper cover 72 is an operation unit. Stirrer 6
3 is disposed in the concave portion of the rotary tank 62, and
It has a similar structure to 8,19. Then, the mechanism section 65
Transmits the rotation of the motor 64 to the agitator 63 during the water supply operation and the washing operation, and transmits the rotation to the rotary tub 62 and the agitator 63 during dehydration. The rotation speed of the motor 64 during the water supply operation is controlled to be lower than that during the washing operation.

In the washing machine of FIG. 20, when the laundry is stored in the rotating tub 62 and the start switch is turned on, the water supply valve 7 is turned on.
Water supply of 0 is started. When the water level in the rotating tank 62 reaches the lower set water level, the motor 64 rotates the stirring body 63 or the rotating tank 62 at a low rotation speed. As a result, the laundry flows together with the water, and the laundry at a distant location is also flooded with water under the water supply port and submerged in the water. Water supply valve 7
When the water supply of 0 continuously reaches the higher set water level, the slow rotation of the stirring body 63 or the rotating tank 62 is stopped, and the water supply is also stopped. Thereafter, the control for the washing operation is executed.

[0006]

The conventional electric washing machine is
As described above, the agitator and the rotating tank are rotated while the water supply into the rotating tank reaches the high water level from the low set water level. Then, the rotation of the stirrer or the rotating tub and the supply of water are stopped at a high set water level, and thereafter control for a normal washing operation is executed. Therefore, there is an advantage in that the laundry located at a location far from the water supply port is also flooded with water during the water supply, so that the laundry is quickly submerged, and the detergent permeates to improve the washing effect.
However, after the rotation and the supply of water are stopped, the same washing operation as in a normal washing machine is performed. For this reason,
Since the operations of the respective steps such as rinsing and dehydration are sequentially repeated as time elapses, there is a problem that the entire process time of the washing operation becomes longer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the rotary tank and the stirring blade are moved in a time series during the water supply / drainage operation in the washing and rinsing steps, thereby shortening the total operation time. An object of the present invention is to realize a washing method of an electric washing machine.

[0008]

SUMMARY OF THE INVENTION A washing method for an electric washing machine according to the present invention includes a washing step of supplying water to a washing tub into which laundry and detergent are charged, and performing washing while stirring with a stirring blade. A rinsing step of supplying water into the washing tub and performing rinsing while stirring the laundry with the stirring blades, wherein the washing tub is moved for a predetermined time or after the water supply operation of the washing step is started. It is characterized in that it is rotated until a predetermined water level is reached, and the agitating blade is rotated at the same time as the rotation of the washing tub is stopped, so that its rotating force is increased in accordance with the rise in the water level.

Further, the invention is characterized in that the number of rotations and the rotation angle of the stirring blade are changed with the passage of the rotation time.

The rotation angle, angular speed, rise time, fall time, etc. of the stirring blade are set based on the quality, quantity, and degree of contamination of the laundry in the washing tub when the stirring blade rotates. I have.

Also, a washing step in which water is supplied into a washing tub into which laundry and detergent are charged and washing is performed while stirring with a stirring blade, and the washing is performed by supplying water into the washing tub and stirring the laundry with a stirring blade. In the washing method of an electric washing machine having a rinsing step of performing rinsing while reducing the stirring force of the stirring blades after the drainage operation of the washing step starts as the water level in the washing tub decreases, When a predetermined water level is reached, the agitating blades are stopped and the washing tub is rotated at the same time.

Further, the present invention is characterized in that the number of revolutions of the washing tub is increased in accordance with a decrease in the water level.

[0013] Further, a washing step in which water is supplied into a washing tub into which laundry and detergent are charged and washing is performed while stirring with a stirring blade, and water is supplied into the washing tub and the laundry is stirred with a stirring blade. A washing method for an electric washing machine having a rinsing step of performing rinsing while rotating the washing tub during a period from when a water supply operation of the rinsing step is started until the water level in the washing tub reaches a predetermined level, After the water level reaches a predetermined level, the stirring blade is rotated.

[0014]

When the laundry is put into the washing tub, the weight sensor detects the weight of the washing tub into which the laundry is put. The control unit that inputs the detected weight calculates the weight of the laundry in the washing tub. Subsequently, the motor is driven, and when the number of rotations reaches a certain number, the power supply to the motor is stopped. A moment of inertia is calculated from a temporal change until the rotation speed of the washing tub detected by the rotation sensor stops. Based on the detected weight and the moment of inertia, the quality of the laundry is inferred to be large, medium, and small, and the washing conditions such as the water level, the washing conditions, the rinsing conditions, or the dehydration time of the washing and rinsing steps are set together with the detergent amount.

An operation of a start key for automatic operation starts a water supply operation into the washing tub. When the motor is driven, the laundry in the washing tub is evenly and uniformly sprayed with water. When the water level becomes "low water level", the motor stops and the rotation of the stirring blade is switched. The laundry is slowly stirred while the detergent introduced into the bottom of the washing tub is adapted to the water by the rotation of the rotary wings.

When the water level in the washing tub reaches the "medium water level", the stirring condition is strengthened and the pre-cleaning operation is performed, and the water level stops at the "high water level" and the full-scale cleaning is started. When the cleaning operation is started, the rotation angle and angular velocity of the stirring blade change, and operations such as "replacement" of the laundry are performed, thereby effectively removing dirt. At the end of the washing operation, the laundry wrapped around and entangled in the “unwinding operation” is unraveled.

Thereafter, the drain valve is opened to start draining, and the stirring of the stirring blade is continued until the water level of the stirring blade becomes "low water level". Since the water is flowing by the continuous stirring operation, the water is discharged to the outside through the drain hose without the detergent or dust adhering to the inner wall surface or the like. When drainage proceeds and the water in the washing tub is almost exhausted and the water level falls, low-speed dehydration of the washing tub is started in parallel. The rotation of the washing tub increases from a low speed to a decrease in the water level, and the washing water contained in the laundry is gradually discharged out of the tub.

As described above, the process proceeds to the next rinsing process through a washing process optimal for the quality and weight of the laundry. The rotation of the washing tub and the stirring of the stirring blades are performed in parallel with the supply and drainage, and the washing is performed while reducing the total washing time.

[0019]

[Embodiment 1] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of the configuration of the first embodiment of the present invention, and FIG. 2 is a top view and a cross-sectional view of the stirring blade of FIG. 1, in which the present invention is applied to a fully automatic washing machine. In FIG. 1, 1 is a main body of the electric washing machine, and 2 is an outer box. Reference numeral 3 denotes a water receiving tank, 4 denotes a plurality of hanging rods, 5 denotes an anti-vibration spring, and 6 denotes a dehydrating tank having a dehydrating hole and rotatably provided in the water receiving tank 3. The water receiving tub 3 is suspended in the outer box 2 via a hanging rod 4 and is disposed outside the dehydrating tub 6.
The bottom surfaces 3a and 6a of the water receiving tub 3 and the dewatering tub 6 are formed in a similar shape in which the center part swells in the tank inner direction, and a conical space S is provided below. W is water including tap water, washing water and rinsing water, C is laundry, H is the height of the main body 1, and L is the water level.

Reference numeral 7 denotes a DC brushless motor, reference numeral 8 denotes a clutch mechanism, and reference numeral 9 denotes a stirring blade. The upper part of the motor 7 and the clutch mechanism 8 are disposed in the space S, and the output shaft is connected to the dewatering tank 6 and the stirring blade 9. When the rotation direction of the motor 7 is right or left, the clutch mechanism 8 is turned on / off, and the rotation torque of the motor 7 is changed according to the change of the on / off state of the clutch mechanism 8. Can be switched alternately.

The structure of the stirring blade 9 is shown in FIGS. 2 (a) and 2 (b). 9a is a substrate of the stirring blade 9, 9b is a rib, 9c
Is the vertex of the rib 9b. The substrate 9a is formed in an umbrella shape along the bottom surface 6a of the dewatering tub 6 as shown in the figure, and ribs 9b are provided radially protruding at equal angular intervals near the upper surface side. By arranging the motor 7 in the space S with the cooperative structure of the umbrella-shaped stirring blade 9 and the bulging bottom surfaces 3a and 6a, the height H of the main body 1 is reduced, and improvement in operability is considered. .
θ is the positive or negative rotation angle of the stirring blade 9, and the symbol of ω (not shown) is used as the angular velocity.

In FIG. 2B, R is the radius of the stirring blade 9,
r is the radius of the vertex, h1 is the height of the vertex 9c, h2 is the rib 9
b is the height of the peripheral end. Assuming that n is the number of the ribs 9b, the number n, the radii R and r, and the heights h1 and h2 are selected from the following experimental results in the following relationship. n = 5 to 7 r / R = 1/2 to 2/3 h1 / h2 = 1/2 to 1/3

Generally, when the amount of laundry C in the dewatering tub 6 (water receiving tub 3) is small, the bath ratio (W / C) is large.
As shown by the arrow (a), the laundry C moves along the flow of the water W rising down the side after descending the center. However, as is common practice at home, the laundry C has a rated capacity of 5%.
When the bath ratio becomes 0% or more and the bath ratio becomes small, the rotating force of the stirring blade 9 acts strongly, and the laundry C is drawn into the center from the side surface and circulated in the opposite flow [FIG. 3 (b)].
]. The present inventors have conducted various experimental studies on the relationship between the number and shape of the ribs 9b formed on the umbrella-shaped stirring blade 9 and uneven washing.

FIGS. 4 and 5 are characteristic diagrams obtained from experimental results. FIG. 4 (a) shows the relationship between the washing amount Cv and the washing unevenness ratio (here, the symbol σr is used temporarily). The washing unevenness is (standard deviation) / (average washing degree), and the washing unevenness ratio σr
Is a ratio when the washing unevenness when washing 6 kg of laundry C is washed with a conventional stirring blade is set to 1. FIG. 4B shows the characteristics of the r / R, the washing unevenness ratio σr, and the load torque ratio τr. The vertical axes in FIGS. 5A and 5B are the washing unevenness ratio σr and the load torque ratio τr, respectively, and the horizontal axes are n and h2 / h1. The load torque ratio τr is a ratio where the load torque of the conventional stirring blade is set to 1.

As shown by the solid line in FIG. 4 (a), according to the present invention, the washing unevenness ratio σr is smaller than in the prior art. Also,
In order to reduce the washing unevenness ratio σr below the conventional load torque, it can be achieved by selecting r / R approximately in the range of 0.5 to 0.7 and the number of the stirring blades 9 in the range of 4 to 6. Revealed. Furthermore, it was also concluded that the washing unevenness can be reduced by setting h2 / h1 to about 0.3 to 0.5.

Referring again to FIGS. 1 and 2, reference numeral 11 denotes a water pipe, 1
2 is a drain valve and 13 is a drain hose. The water distribution pipe 11 is opened at the bottom surface 3 a of the water receiving tank 3, and discharges washing water and rinsing water W in the water receiving tank 3 and the dewatering tank 6 according to opening and closing of the drain valve 12. 14 is a water supply pipe, 15 is a water supply valve, and 16 is a water supply port. The water supply pipe 14 is connected to a water pipe, and supplies tap water W to the water receiving tank 3 and the dewatering tank 6. 17 is a lid, 18 is a lid switch.

21 is a weight sensor, 22 is a current sensor, 2
3 is a rotation sensor, 24 is an optical sensor, 25 is a bubble sensor, 2
6 is a pressure sensor. The pressure sensor 26 detects the level of the water W in the dehydration tank 6. Conventionally known sensor elements are used for the weight sensor 21 and the like. Among the sensors, the weight sensor 21 for detecting a load amount in particular, the optical sensor 24 for detecting a cleaning degree (dirty degree), and a bubble generated from a detergent are used. The configuration of the foam sensor 25 to be detected is shown in each of FIGS.
Illustrated in (a).

In FIG. 6 showing the structure of the weight sensor 21, reference numeral 21a denotes a spring suspended in the middle of the suspension rod 4, 21b.
Is a magnetoresistive element and 21c is a magnet. 7 of FIG.
4a is a transparent pipe bypassing the water pipe 11, 24
b and 24c are projection and light receiving elements, and 25a in FIG.
And a counter electrode disposed in a gap between the dehydration tub 6 and the dehydration tub 6. The weight sensor 21, the optical sensor 24, and the foam sensor 25 detect the weight, the cleaning degree (dirty degree), and the foam amount, respectively, based on changes in the output showing the characteristics as shown in FIG.

Reference numeral 30 denotes an operation unit. The operation unit 30 is provided around the cover 17 of the outer box 1 as shown by a two-dot chain line, and is configured by operation keys, a display, and the like, and a control board is provided on the back side. A control unit 40 including a CPU having a memory function and a timer function as shown in FIG. 9 together with operation keys and an electronic circuit constituting an indicator or input / output control unit formed of a lamp or liquid crystal, etc. Has been implemented. In addition, a brake circuit and an alarm circuit for applying electric braking to the motor 7 are incorporated in the control board constituting the control unit 40.

The washing operation including the method of each embodiment of the present invention having such a configuration will be described below with reference to the timing charts of FIGS. Here, the function of the water receiving tub 3 is added to the washing tub 6 described above, and the operation of the dehydrating tub 6 will be replaced with a new “washing tub 6”. I Washing Step A power plug is inserted into an AC100V outlet in advance. A large amount of the collected laundry C is sorted by being piled up on a plurality of piles on the floor of the laundry with a laundry capacity of about 50% or more of the rated capacity depending on the cloth and the like. The lid 17 of the main body 1 is opened, and the first pile of laundry C is put into the washing tub 6.

IA Operation for Detecting Weight and the Like The weight sensor 21 detects the weight of the washing tub 6 (water receiving tub + dehydrating tub) into which the laundry C is put. The control unit 40 that has input the detected weight calculates the weight of the laundry C in a dry state in the washing tub 6. The power key of the operation unit 30 is pressed, the motor 7 is driven, and the washing tub 6 starts rotating via the clutch mechanism 8 in the OFF state. The rotation speed of the washing tub 6 is about 10
At 0 rpm, the power supply to the motor 7 is stopped. The moment of inertia is calculated by the control unit 40 using the temporal change until the rotation speed of the washing tub 6 detected by the rotation sensor 23 stops.

IB Inference operation of quantity, quality, etc. Due to the weight and the moment of inertia based on the weight detected by the weight sensor 21, for example, as shown in FIG. Inferred to medium and small. Similarly, the weight of the laundry C is also ranked, and the amount of the detergent s is displayed on the display of the operation unit 30 by the number of spoons according to the inferred amount and quality of the laundry C. You. Looking at the display on the operation unit 30, the designated predetermined amount of the detergent s is put into the washing tub 6.

IC Setting Operation of Washing Conditions From the inference result, for example, the following washing conditions are set. Water level L High level Washing condition Low water level 50 rpm. 360 ° (one rotation) Medium water level 100 rpm. 540 ° (1.5 rotations) High water level 120 rpm. 540 ° (1.5 rotations) for 2 minutes 100 rpm. 900 ° (2.5 rotations) for 1 minute 150 rpm. 270 ° (3/4 rotation) for 1 minute up to the water level in the drainage 100 rpm. 270 ° (3/4 rotation) Middle water level → Low water level 50 rpm. 270 ° (3/4 rotation) Rinse conditions 2 times High level 150 rpm. 270 ° dehydration condition 3 minutes Based on the thus set washing conditions, the automatic operation of washing is started.

ID Flip-in rotation operation When the start key for automatic operation of the operation unit 30 is turned ON,
The water supply valve 15 is automatically opened and the water supply port 16 is connected to the washing tub 6.
The water supply operation to the inside starts. The motor 7 is driven, and the washing tub 6 starts rotating at about 100 rpm. With the rotation of the washing tub 6 at a low speed, the supplied water W causes the laundry C in the washing tub 6 to rotate.
Is evenly spread over the water. When the water supply to the washing tub 6 is advanced and the water level L becomes “low water level”, the power supply to the motor 7 is stopped and the brake is operated for 15 seconds so that the washing tub 6 is operated.
Rotation stops.

IE Adaptive Stirring Operation Both the motor 7 and the clutch mechanism 8 are turned ON, and the rotation of the stirring blade 9 is switched to the clockwise (right) direction at about 50 rpm. When the stirring blade 9 rotates about 360 degrees (one rotation), the right rotation of the motor 7 is turned off. Next, the agitating blade 9 is inverted by about 360 degrees in the opposite direction at the same rotation speed, and the motor 7 is turned off again.
Is done. In the same manner, the rotation of the stirring blade 9 is repeated by one forward and reverse rotation, and the detergent s put into the bottom of the washing tub 6 is slowly stirred while the water W is dissolved and the laundry C is adapted. Is done.

When the water level L of the washing tub 6 rises to the "medium water level", the stirring conditions are strengthened and the number of rotations becomes about 100.
The rotation is normal and reverse at a rotation angle θ of about 540 degrees (1.5 rotations) at rpm. By the so-called pre-cleaning operation accompanying the rotation of the washing tub 6 of ID and E and the stirring of the stirring blade 9, the detergent s permeates all the laundry C in the washing tub 6 while being dissolved in the water W. . Then, when the water level L reaches the "high water level", it is immersed and immersed in the washing water W, thereby contributing to the next full-scale washing function and shortening the total washing time.

If the water supply proceeds and the water level L in the tank reaches the set “high water level”, the power to the water supply valve 15 is turned off. Stops and the water supply operation stops. At this time, the rotation speed of the stirring blade 9 is about 120 rpm.
m to further enhance the stirring operation. Then, a full-fledged “washing operation” centered on the laundry C below the washing tub 6.
Is started, and the dirt is removed from the laundry C. This operation is shown in FIG. As is clear from the figure, the stirring power is increased in response to the rise in the water level.

When the enhanced "washing operation" of the stirring blade 9 is continued for 2 minutes, the rotation speed of the stirring blade 9 is reduced to about 1
It is dropped to 00 rpm. At the same time, the rotation angle θ of the stirring blade 9
Is enlarged to about 900 degrees (about 2.5 rotations). A stirring operation consisting of a decrease in the rotation speed of the stirring blade 9 and an increase in the rotation angle θ is performed for about one minute, and a “replacement operation” of the laundry C in the vertical direction in parallel with the washing operation in the washing tub 6 ( Vertical rotation) is performed.

When the "replacement operation" for about 1 minute is completed, the stirring conditions of the stirring blade 9 are switched again to the original rotation speed of about 120 rpm, the rotation angle θ of about 540 °, and the time of 2 minutes. Subsequently, the second stirring condition (about 100 rpm, about 900 rpm)
, 1 minute → about 120 rpm, about 540 degrees, 2 minutes), the “washing operation” and the “replacement operation” are performed, and the uniform cleaning of the laundry C is repeatedly promoted.

At the end of the cleaning operation, the stirring conditions of the stirring blade 9 are switched to 150 rpm, about 270 ° (３ rotation), and 1 minute. By switching the stirring conditions, the laundry C is given a small vibration with a fast cycle. As a result, the laundry wrapped and entangled in the washing tub 6 is unraveled under the switched stirring conditions.

Here, two operations, particularly, a "replacement operation" and an "opening operation" will be described. When the rotation angle θ of the stirring blade 9 in the stationary washing tub 6 is increased, the lower portion of the laundry C that is in contact with the stirring blade 9 follows the stirring blade 9 and moves while being compressed in the rotation direction. I do. For this reason, a space is created in the portion of the washing tub 6 around which the laundry C has moved, and the laundry C in the upper layer falls and the upper and lower parts are automatically replaced. On the other hand, when the angular velocity ω of the stirring blade 9 is large and rapidly rotates, the stirring blade 9 is likely to idle due to inertia of the laundry C in a stationary state including the water W. Conversely, when the angular velocity ω is low, the laundry C follows the rotation of the stirring blade 9, so that the stirring force is weakened. Therefore, it is necessary to select the angular speed ω of the stirring blade 9 at the intermediate speed as described above.

The full-scale washing operation in the washing process is as follows.
Generally, it is carried out at a high water level L. Therefore, this is practically equivalent to the case where the above-mentioned bath ratio is large, and the flow of water W occurs in the washing tub 6 as shown in FIG. As a result, a flow ascending around the periphery and descending at the center as shown by the arrow in FIG. 3A occurs, and the laundry C moves by receiving the dynamic pressure of this flow. By such a moving operation involving dynamic pressure, the "unraveling" action of underwear sleeves, strings, and the like entangled with each other by agitation is performed.

The washing conditions of the embodiment of the present invention for the above-described "washing operation", "replacement operation", and "opening operation" are displayed as follows. Rotation speed (RPM) Rotation Stop interval (sec) Washing operation 130 1-2 0.3 Replacement operation 100 2-3 0.3 Unraveling operation 150 -1 0.2

FIGS. 14 to 16 show experimental results of the optimal regions of the above three operations. FIGS. 15 and 16 show characteristic curves of the cleaning degree with respect to the rotation angle θ and the angular velocity ω of the stirring blade 9 in the cleaning operation. According to FIG. 15, when the angular velocity ω is 130 rpm, the cleaning degree is 5
It becomes higher around 40 to 740 degrees. When the rotation angle θ is 54
At 0 degree, the cleaning degree reaches a peak at about 130 rpm. Therefore, by selecting the rotation angle θ and the angular velocity ω of the stirring blade 9 at least within the closed curve of FIG. 14, each operation of “washing”, “replacement”, and “unraveling” can be effectively performed.

Drainage Operation with I-G Cleaning After that, the drainage valve 12 is turned on to start drainage,
Until the water level L in the washing tub 6 becomes "medium water level", the stirring conditions are about 100 rpm and about 270 degrees (approximately 3/4 rotation).
And the laundry C is agitated (see FIG. 13 (b)). When the water level L drops to the “medium water level”, the stirring condition becomes about 50
rpm, dropped further to about 270 °. The laundry C is agitated while being drained under such weak stirring conditions and is continued to a low water level. When the water level becomes low, the power supply to the motor 7 and the clutch mechanism 8 is stopped, and the laundry C is stirred by the stirring blade 9. Is stopped.

IH Drainage Operation with Discharge of Garbage The above operation promotes the cleaning of the laundry C without damaging the cloth of the laundry C during drainage. Since the water W in the washing tub 6 is stirred by the stirring blades 9 while being drained, the water W between the inner and outer walls of the washing tub 6 (between the outer surface of the dewatering tub and the inner surface of the water receiving tub) also flows. You. Therefore, there is no adhesion of the detergent s or dust on the outer wall surface and the inner wall surface of the washing tub 6, and
The detergent s, lint and the like are guided into the water flow without stopping inside and discharged from the drain hose 13 to the outside.

I-I Drainage Operation with Intermediate Dewatering When the drainage further proceeds and the water W in the washing tub 6 almost disappears and the water level L becomes a small water level, the motor 7 is turned on again and the washing tub 6 Low speed dehydration at 300 rpm is started in parallel. The water W contained in the laundry C is gradually dewatered by centrifugal dehydration due to the weak spinning of the washing tub 6 at a low speed.
It is discharged outside. Thereafter, every time 30 seconds elapse, the rotation speed of the washing tub 6 is stepwise increased from about 400 rpm to 800 rpm. Due to this increase in the number of rotations, the laundry C
Is squeezed out and discharged. Then, one minute later, the power supply to the right-rotating motor 7 is stopped.
The rotation of the washing tub 6 also stops. The waste time at the end of the draining operation is utilized for the dehydrating operation, and the time can be reduced here as well.

In this case, the water level L in the washing tub 6 may exceed the "low water level", or the foam sensor 25 may detect the occurrence of foam. When the bubble sensor 25 detects a bubble, the power supply to the right rotation of the motor 7 is turned off. The brake is applied to the washing tub 6 that rotates by inertia, and the rotation is forcibly stopped. By this operation, it is possible to avoid the delay of the drainage time due to the foam, the risk of failure due to the strong reverse torque applied to the washing tub 6, and the wasteful consumption of electric power. Then, the power supply to the drain valve 12 is stopped, and the drain valve 12 is stopped. When 15 seconds have passed since the closing of the drain valve 12, the brake of the motor 7 is electrically released by the brake circuit.

II Rinsing Step II-A Scrubbing Operation Next, the water supply valve 15 and the rotation of the motor 7 in the right direction are turned ON, and while the water is supplied into the tub, the clutch mechanism 8 is held OFF to wash the tub 6. Rotate at about 100 rpm. The laundry C attached to the inner wall of the washing tub 6 by the above-mentioned dehydration operation,
Water W is supplied from the water supply port 16. As a result, the laundry C
The water W is released from the inner wall of the washing tub 6 while containing water, and is scraped off to the bottom of the washing tub 6 while containing water.

II-B Rinsing operation Water supply from the water supply port 16 to the washing tub 6 proceeds, and the water level L
When the water level becomes "low water level", the same operation as the preliminary washing near IE described above is performed. In other words, the stirring operation in parallel with the water supply is performed by the low-speed rotation of the stirring blade 9 that is repeated in the angular range of 360 degrees while reversing forward and reverse. When the water level L becomes “high water level”, the stirring conditions of the stirring blade 9 are set to 150 rpm,
Stirring is performed at about 270 ° (回 転 rotation) for 2 minutes. In the same manner as described above, in the rinsing operation in which the laundry C oscillates at high speed and in a small angle range, the detergent remaining in the fibers of the laundry C without entanglement of the cloth is removed from the water supplied from the water supply port 16. It is derived by W and rinsed out into the washing water.

Thereafter, the same operations as those in II-A and II-B described above are executed, and new water W is gradually adapted to the laundry C by supplying water to the washing tub 6. In addition, even during drainage, the laundry C is flow-stirred under stirring conditions corresponding to the water level L, and the first rinsing operation proceeds while efficiently washing out the detergent.

II-C Scrubbing / Rinse Operation (Second Time) Subsequently, a second rinsing operation is executed, and the detergent and dirt components remaining in the laundry C are washed out in the same manner as described above to efficiently rinse. It is. Then, the drainage valve 12 and the clutch mechanism 8 are turned off, the motor 7 (right) is turned on to set the drainage state, and the drainage operation is performed while the washing tub 6 is rotated at about 100 rpm and centrifugally dewatered. At the time of this second rinsing operation, cleaning is performed based on the flow of the water W in the washing tub 6, and the dropped dirt and dust are conveyed to the drainage flow without adhering to the wall surface of the washing tub 6. Drain from drain hose. By this cleaning operation, the occurrence of black mold inside the washing machine at a later date is suppressed.

The drainage in the washing tub 6 proceeds and the water level L
When the water level becomes "low water level", the rotation of the washing tub 6 is increased by about 3 seconds for 30 seconds.
It is changed to 00 rpm. Subsequently, when 30 seconds elapse after the speed is increased to about 400 rpm, high-speed dehydration at about 800 rpm is further performed for 2 minutes. By such stepwise centrifugal dehydration, the rinsing water contained in the laundry C is efficiently discharged. Thereafter, the power supply to the motor 7 is stopped, the inertial rotation is started, the brake is turned on for 15 seconds, and the motor 7 is forcibly stopped. The drain valve 12 and the brake are turned off, the power is automatically shut off, the execution of the above-described series of washing steps of the washing machine is all stopped, and the first washing is completed.

When the first washing is completed, the lid 1 of the main body 1
7 is opened and the dehydrated laundry C is taken out of the washing tub 6 and put in a bucket. At this time, even if the garbage left at the time of provisional drainage adheres to the bottom surface of the washing tub 6, it can be easily taken out. That is, the stirring blade 9 is formed in an umbrella shape, and the motor 7 and the clutch mechanism 8 are disposed by skillfully utilizing the conical space S below the stirring blade 9. For this reason, since the height of the main body 1 is low and it is compact, the small laundry C left at the bottom can be easily picked up and discarded, as well as the dust at this time, which is convenient. In addition,
The umbrella-shaped stirring blade 9 protruding into the tub can reduce the decrease in the internal volume of the washing tub 6 to one third as compared with the cylindrical stirring blade having the same height.

Subsequently, the pile of the second laundry C piled up on the floor is put into the washing tub 6. Following the same process, the next second washing is performed. After the process proceeds to the second washing process of the laundry C and the detergent s is supplied, the washed laundry C in the washed bucket is hung on a clothesline and dried.

III-Other Operations III-A Interrupt Washing / Interrupt Rinsing Operations During washing, it becomes common to notice that laundry C has been forgotten to be washed. When the laundry C is a soft cloth such as silk fabric, hand washing may be performed. In such a case, while the washing or dehydration is in progress, the remaining laundry C and the washing / interrupting rinsing of the laundry C in the bag are performed for rinsing after hand washing. When the lid 17 is forcibly opened during the cleaning or dehydration by the interruption operation, the lid switch 18
The FF signal is output to the control unit 40. In response to an operation signal from the control unit, a brake is applied to the motor 7 during dehydration, and the rotation of the washing tub 6 is stopped.

After the additional laundry C is put into the washing tub 6, the rotation angle θ of the stirring blade 9 is increased by 90 ° by the control operation of the control unit 40 regardless of the opening and closing of the lid 17, and the stirring force is increased. Be strengthened. As a result, the detergent s quickly permeates into the added laundry C, and the dirt is quickly removed. In addition, with the increase in the rotation angle θ after the insertion, the water W rapidly permeates the laundry C after the hand washing, and the rinsing ability is enhanced. By changing the washing conditions suitable for the situation in this way,
The shortage of washing and rinsing of the interrupted laundry C is eliminated. In this case, the lid switch 18 has both the original lock function and the sensor function.

III-B Operation for Preventing Damage to Laundry When the stirring operation by the stirring blade 9 is operating normally,
The characteristic shown by the solid line in FIG. When the entangled laundry C is entrained during the stirring operation, the torque rapidly increases and the angular velocity ω decreases as shown in FIG. 17 (b). When such a phenomenon occurs, the laundry C being washed may be damaged or the motor 7 may be broken. Using the current sensor 22 (or the rotation sensor 23) connected to the input conductor of the motor 7, a change in the output torque at the time of abnormality is detected. The current sensor 22 outputs a detection signal to the control unit 40, and the control is performed so that the angular velocity ω of the stirring blade 9 decreases. The control operation of the control unit 40 prevents damage to the laundry C and failure of the motor 7.

III-C Washing Operation According to Soil Degree When the start key of the operation unit 30 is pressed to start the washing process, the optical sensor 24 shown in FIG. 7 starts a detecting operation.
Thereafter, the optical sensor 24 detects when the ID water supply operation is started and the degree of dirt before moving to the IF washing step. The control unit 40 calculates a temporal change in the degree of contamination based on the two detection signals of the optical sensor 24, compares the change with the reference value, and uses the same method as in the case of the above-described weight for the laundry C.
Is inferred.

The angular velocity ω, the rotation angle θ, the rise time, the fall time, and the stop time (at the time of forward / reverse switching) of the stirring blade 9 are set based on the inferred degree of contamination, the above-mentioned quality and the washing amount. . The optimum washing conditions for the quality and quantity of the laundry C and the degree of contamination are set according to the set washing conditions. The washing process and the washing process are performed under the washing conditions set in accordance with the degree of dirt, and a washing method with high washing performance without damage to the cloth or shape collapse is performed.

III-D Washing Operation with Constant Washing Degree The washing method is employed to make the washing time constant regardless of the quality and quantity and the degree of dirt, or to perform a constant washing regardless of the washing amount and dirt degree. It will be possible to finish every time. By employing such a method, it is possible to estimate the required time and the end time of the washing performed each time, so that there is an advantage that the housewife can perform daily housework in a planned manner.

In the above-described embodiment of the present invention, the case where the dewatering tub and the washing tub are an integrated type fully automatic washing machine has been described as an example. However, in some embodiments, the dewatering tub and the washing tub are separated.
The present invention can be applied to a tub-type electric washing machine.
Further, the case where the three-stage washing condition and the cyclic washing condition are set and performed at the time of the water supply of the IC and the washing condition of the high water level has been described, but the number of stages and the number of combinations may be appropriately increased or decreased. Reverse circulation may be performed. In addition, the structure, shape, and the like of the hanging bar and the like that hold the washing machine main body and the washing tub in a freely vibrating manner are not necessarily limited to the embodiments.

[0063]

Since the present invention is configured as described above, it has the following effects.

The washing method of the electric washing machine according to the present invention comprises: a washing step in which water is supplied into a washing tub into which laundry and a detergent are charged and washing is performed while stirring with a stirring blade; A washing step of the electric washing machine having a rinsing step of performing rinsing while stirring the laundry with the stirring wings, wherein the water in the washing tub reaches a predetermined time or a predetermined water level after the water supply operation of the washing step is started. Until the washing tub stops rotating, and at the same time, the agitating blades are rotated to increase the rotating force as the water level rises, so that all the washing in the washing tub is performed while the detergent is dissolved in the water. It can penetrate evenly into the object and contribute to the washing function of washing, thereby shortening the total washing time.

Since the rotation speed and the rotation angle of the stirring blade are changed in accordance with the elapse of the rotation time, for example, when the rotation angle of the stirring blade is 540 °, the “washing operation” of the laundry is performed. , 900 °, the “replacement operation” of the laundry is performed, and the promotion of uniform cleaning of the laundry is repeatedly performed, so that the total washing time can be reduced.

Also, when the stirring blade rotates, the rotation angle, angular velocity, rise time, fall time, etc. of the stirring blade are set based on the quality, quantity and degree of contamination of the laundry in the washing tub. The washing time can be kept constant irrespective of the quality, quantity and degree of soiling of the laundry, and the time can be shortened.

A washing step in which water is supplied to the washing tub into which the laundry and the detergent are charged and washing is performed while stirring with the stirring blade, and the washing is performed by supplying water into the washing tub and stirring the laundry with the stirring blade. In the washing method of an electric washing machine having a rinsing step of performing rinsing while reducing the stirring force of the stirring blades after the drainage operation of the washing step starts as the water level in the washing tub decreases, When the predetermined level is reached, the agitating blades are stopped and the washing tub is rotated at the same time, so that the agitating action of the agitating blades during the draining operation does not damage the cloth of the laundry, thereby facilitating the removal of dirt. . In addition, the water contained in the laundry is gradually discharged to the outside of the washing tub by the rotating action of the washing tub, and the dewatering operation is performed during the draining operation, so that the total washing time can be reduced.

Further, since the number of revolutions of the washing tub is increased in accordance with the decrease in the water level, water contained in the laundry is squeezed out at the end of the draining operation and discharged out of the washing tub. Since the dehydration operation can be utilized without wasting waste, the total washing time can be reduced.

A washing step in which water is supplied to a washing tub into which laundry and detergent are charged and washing is performed while stirring with a stirring blade, and the washing is performed by supplying water into the washing tub and stirring the laundry with a stirring blade. A washing method for an electric washing machine having a rinsing step of performing rinsing while rotating the washing tub during a period from when a water supply operation of the rinsing step is started until the water level in the washing tub reaches a predetermined level, After the water level reached a predetermined level, the stirring blades were rotated, so that the laundry sticking to the wall in the washing tub was scraped off by the dehydration process, which is the previous process of this process, and The laundry is not entangled by swaying the clothes at high speed and in a small angle range, and the detergent remaining in the fibers of the laundry is led out by the poured water and rinsed out with the rinsing water. Thereby, the rinsing operation is promoted, and the rinsing time can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory diagram of a first embodiment of the present invention.

FIG. 2 is a top view and a cross-sectional view of the stirring blade of FIG.

FIG. 3 is an operation explanatory diagram of the first embodiment of the present invention.

FIG. 4 is another operation explanatory view of the first embodiment of the present invention.

FIG. 5 is another operation explanatory view of the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of a configuration of the weight sensor of FIG. 1;

FIG. 7 is an explanatory diagram of a configuration of the optical sensor of FIG. 1;

FIG. 8 is an explanatory diagram of a configuration of the foam sensor of FIG. 1;

FIG. 9 is a block diagram illustrating a configuration of a control unit according to the embodiment of the present invention.

FIG. 10 is a timing chart for explaining the operation of the embodiment method of the present invention.

FIG. 11 is a timing chart for explaining the operation of the embodiment method of the present invention.

FIG. 12 is an explanatory diagram for inferring the cloth quality of the laundry by the embodiment method of the present invention.

FIG. 13 is a diagram illustrating the operation of the stirring blade according to the embodiment of the present invention.

FIG. 14 is another operation explanatory view of the stirring blade of the method according to the embodiment of the present invention.

FIG. 15 is a characteristic diagram of the degree of cleaning in the method according to the embodiment of the present invention.

FIG. 16 is another characteristic diagram of the degree of cleaning in the method of the embodiment of the present invention.

FIG. 17 is an explanatory diagram showing characteristics of angular velocity and torque for explaining an abnormal state of the method according to the embodiment of the present invention.

FIG. 18 is a diagram illustrating a configuration of a conventional electric washing machine.

FIG. 19 is a configuration explanatory view of another conventional electric washing machine.

FIG. 20 is a configuration explanatory view of another conventional electric washing machine.

[Explanation of symbols]

1 body, 3 water receiving tank (washing tank), 6 dehydrating tank (washing tank), 7 motor, 8 clutch mechanism, 9 stirring blade, 12
Drain valve, 15 water supply valve, 17 lid, 18 lid switch,
21 weight sensor, 22 current sensor, 23 rotation sensor, 24 optical sensor, 25 foam sensor, 26 pressure sensor, 30 operation unit.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Norihiko Ishikawa 1-1-1 Yamate, Funabashi-shi, Chiba Japan Funabashi Works (72) Inventor Shin-ichi Nakamura 2--14-40 Ofuna, Kamakura-shi Mitsubishi Electric Corporation Living System Development Laboratory (72) Inventor Masaji Hisugino 2-14-40 Ofuna, Kamakura City Mitsubishi Electric Corporation Living System Development Laboratory (72) Inventor Yoshio Yoshida 2-14 Ofuna, Kamakura City No. 40 Mitsubishi Electric Corporation Living System Development Laboratory (72) Inventor Hideo Akutsu 2-14-40 Ofuna, Kamakura City Mitsubishi Electric Corporation Living System Development Laboratory (72) Inventor Hiroko Imamura Ofuna, Kamakura City No.14-40, Mitsubishi Electric Corporation Living System Development Laboratory (56) References JP-A-62-290495 (JP, A) JP-A-3-143497 (JP, A) JP-A-4-152983 (JP, A) JP-A-61-98285 (JP, A) JP-A-63-192491 (JP, A) JP-A-60-225598 (JP JP-A-3-70590 (JP, A) JP-A-63-24990 (JP, A) JP-A-5-48886 (JP, U) JP-A-63-199785 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) D06F 33/02

Claims (6)

(57) [Claims] 1. A washing tub into which laundry and detergent are put.
Washing process in which washing is performed while supplying water and stirring with stirring blades
Water is supplied into the washing tub and the laundry is stirred by the stirring blades.
A washing step of the electric washing machine having a rinsing step of performing rinsing while performing the rinsing operation.
Rotate for a fixed time or until a specified water level is reached
At the same time as the rotation of the washing tub stops,
Rotate and increase its torque as water level rises
A method for washing an electric washing machine, characterized in that the washing is performed. 2. The rotation speed and rotation angle of the stirring blade are rotated.
2. The method for washing an electric washing machine according to claim 1, wherein the washing time is changed as time passes . 3. The inside of the washing tub when the stirring blade rotates.
Based on the quality, quantity and degree of soiling of the laundry.
Set turning angle, angular velocity, rise time, fall time, etc.
The method for washing an electric washing machine according to claim 1, wherein the washing is performed. 4. A washing tub into which laundry and detergent are charged.
Washing process in which washing is performed while supplying water and stirring with stirring blades
Water is supplied into the washing tub and the laundry is stirred by the stirring blades.
A washing method for an electric washing machine having a rinsing step of performing rinsing while rinsing while stirring the stirring blades after a drain operation of the washing step is started.
The agitation power is reduced as the water level in the washing tub falls.
After that, when the predetermined water level is reached,
A washing method for an electric washing machine, wherein the washing tub is rotated at the same time as stopping the stirring blade . 5. The method for washing an electric washing machine according to claim 4, wherein the number of revolutions of said washing tub is increased in accordance with a decrease in water level. 6. A washing tub into which laundry and detergent are charged.
Washing process in which washing is performed while supplying water and stirring with stirring blades
When, stirred wash 濯物 with the stirring blades and the water supply to the washing tub
A water rinsing operation of the electric washing machine having a rinsing step of performing rinsing while rinsing is performed.
Until the water level in the washing tub reaches a predetermined level.
During the period, the washing tub is rotated, and then the water level is at a predetermined level.
The washing method for an electric washing machine, wherein the stirring blade is rotated after reaching the bell .