JP3296712B2 - Washing method and rotating drum type 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 washing method applicable to a rotating drum type fully automatic washing machine having a structure in which laundry is washed by a rotating drum which rotates horizontally in a water tub, and a rotating drum embodying the method. More particularly, the present invention provides a washing method and a rotating drum type fully automatic washing machine suitable for washing dry mark clothing requiring special soft washing operation such as wool or silk. Things.

[0002]

2. Description of the Related Art Generally, in a rotary drum type fully automatic washing machine of this type, a rotary drum is repeatedly rotated in a forward and a reverse direction at regular time intervals around a horizontal axis to protrude from an inner peripheral wall of the rotary drum. With the agitated blades, the "lifting" and "falling" effects are repeatedly given to the laundry to wash the laundry.

[0003] However, in such a washing operation, the washing is performed well due to the mechanical friction between the laundry and the stirring blade, and furthermore, the frictional force between the laundry. It was not suitable for laundry requiring movement. Therefore, some of the conventional washing machines are
As described in JP-A-12639, there has been proposed an apparatus in which a rotating drum is repeatedly rotated alternately in a forward direction and a reverse direction within one rotation (360 °).

[0004]

However, in this conventional fully automatic washing machine, the operation of rotating the drum vertically while performing the operation of periodically inverting the vertical position of the laundry during the washing operation from the beginning to the end is performed. At a constant angle (90 ° to 120 °)
It is configured to repeatedly rotate and wash within the range of, and is only trapped by the rotation angle of the rotating drum, and is still preferable for laundry requiring a soft washing operation such as the wool or silk. It was not something.

The present invention has been made in view of such problems of the conventional rotary drum type fully automatic washing machine,
One washing operation period is divided into two steps before and after, and the water level and the rotation angle of the rotating drum are made different in each step, so that a washing method and a rotating drum type fully automatic which can perform the washing operation optimal for the above-mentioned type of laundry. A washing machine is provided.

[0006]

According to a first aspect of the present invention, there is provided a washing method comprising: a washing drum provided on a front surface of a washing machine main body on a rotating drum supported in a water tub in the washing machine main body so as to be rotatable in a horizontal direction; The laundry is thrown in from the loading slot, the laundry is divided into two stages, the first half and the second half, and in the first half of the laundry, the water level in the water tub is set to the first level and the rotating drum is rotated once. Forward and reverse within a first rotation angle smaller than
Direction, and in the latter half of the washing cycle, the water level in the water tub is raised to a second level such that laundry that is higher than the first level floats .
And the washing is performed by repeatedly rotating the rotary drum in the forward and reverse directions at a second rotation angle smaller than the first rotation angle.

According to this method, in the first half of the washing process, the washing water can be quickly and uniformly penetrated into the laundry without unevenness and the rotation is minimized, so that no mechanical force is applied to the laundry. To increase the detergency. In the latter half of the washing process, the laundry is washed while floating in the water, so that the laundry is extremely less in contact with the stirring blades of the rotating drum, and the frictional force can be minimized.

Therefore, even if the laundry is dry mark clothing such as wool or silk, an optimal washing effect can be expected without damage or shrinkage of the cloth.

In the washing method according to the second aspect of the present invention, the first rotation angle is set in a depth direction of an inner wall surface in the rotating drum.
Central axis of rotation of at least three or more stirring blades provided in
The angle is not less than twice and not more than three times the mounting angle with respect to the rotation angle of the stirring blade with respect to the rotation center axis of the stirring blade.
It is characterized in that the rotary drum as an angle within twice the mounting angle of the so laundering rotate laundry that.

[0010] In this method as well, in the same manner as in the first aspect of the present invention, the washing water can be quickly and evenly penetrated into the laundry in the first half of the washing process and the rotation can be minimized. The detergency is increased by preventing mechanical force from being applied to objects. In the latter half of the washing process, the laundry is washed while floating in the water, so that the laundry is extremely less in contact with the stirring blades of the rotating drum, and the frictional force can be minimized.

Therefore, even if the laundry is dry mark clothing such as wool or silk, an optimal washing effect can be expected without any damage or shrinkage of the cloth.

The washing method according to a third aspect of the present invention is the washing method according to the first aspect of the present invention, wherein the first half of the washing cycle and the second half of the washing cycle each include a rotation stop period of the rotating drum. The rotary drum is minutely driven to swing the surface of the water in the water tank.

According to this method, a small driving force is applied to the rotary drum during a period in which the rotation of the rotary drum is stopped.
Waves can be generated in the water tank to give the laundry the same effect as rubbing. As a result, the washing effect of the laundry can be enhanced by massage washing, and the dilution and diffusion of unnecessary foam can be promoted, and the time required for washing can be reduced.

According to a fourth aspect of the present invention, there is provided a washing method comprising: a washing drum which is rotatably supported in a water tub in a washing machine main body; , The washing process of the laundry is divided into the first half and the second half, and during the first half of the washing, the water level in the water tub is set to the first water level and the rotating drum is rotated once.
At a small first rotation angle in the forward and reverse directions, and in the latter half of the washing cycle, the water level in the water tub is set to a second water level at which laundry higher than the first water level floats. The rotating drum is rotated at a second angle smaller than the first rotation angle.
The washing is performed by repeatedly rotating in the normal and reverse directions at the rotation angle of, and the dehydrating operation performed after the latter half of the washing process is divided into the operation before and after rotating the rotary drum in the same direction, and the latter is performed. greater than the rotational speed during the first half of the dehydration operation of the operation, you characterized in that to perform the rotary drum is rotated at a lower rotational speed than the rotational speed of the standard course, the laundry standard course and dry mark clothing Co
Washing dry mark clothing in a washing machine with
This is the course washing method.

According to this method, particularly in the dehydrating operation, the rotating drum is rotated in the same direction in the first half and the latter half of the dehydrating operation, and the rotation is increased at a stretch during the first half of the dehydrating operation to minimize the friction between the laundry and the inner surface of the rotating drum. Most of the water is removed while the pressure is kept at a minimum, and the rotating drum is rotated at a higher speed in the latter half of the spinning operation than in the first half of the spinning operation to further enhance the spinning effect. As a result, there is no longer the tendency of the laundry to be opened during dehydration, and the laundry can be washed well without damage to the cloth, loss of shape, shrinkage and the like.

According to a fifth aspect of the present invention, there is provided a rotary drum type fully automatic washing machine, wherein a laundry is provided on a front surface of the main body of the washing machine on a rotary drum supported in a water tub in the main body of the washing machine so as to be rotatable in a horizontal direction. A tachometer provided in a drive motor for rotating the rotary drum and for generating pulses in accordance with the rotation of the drive motor, wherein the number of pulses output by the tachometer; Rotation angle detecting means for detecting the rotation angle of the rotating drum, and controlling the driving of the drive motor in response to a signal obtained from the rotation angle detecting means to rotate the rotating drum once.
Remote small first rotation angle and a positive within a small second rotation angle from the rotation angle of the first, and rotation control means for repeating rotation in the reverse direction, the water level in the water tank first water level and the First
Water level control means for controlling the laundry to a second water level at which the laundry higher than the water level floats. In the first half of the laundry, the water in the water tub is set to the first water level and rotated. Move the drum forward or backward within the first rotation angle
In the washing cycle in the second half, the water level in the water tub is set to the second water level, and the rotating drum is repeatedly rotated in the normal and reverse directions within the range of the second rotation angle, so that the washing cycle is repeated. It is characterized in that it is executed.

According to this configuration, the rotation angle of the rotary drum can be reliably detected by the number of pulses output by the tachometer, and the rotation angle of the rotary drum can be reliably controlled during the washing process. Also, the water level in the water tank can be reliably controlled.

As a result, in the first half of the washing process, the washing water can be quickly and evenly penetrated into the laundry evenly and the rotation is minimized, so that no mechanical force is applied to the laundry to wash the laundry. Power can be increased.
In the latter half of the washing process, the laundry is washed while floating in the water, so that the laundry is extremely less in contact with the stirring blades of the rotating drum, and the frictional force can be minimized.

Therefore, even if the laundry is dry mark clothing such as wool or silk, an optimal washing effect can be expected without damage or shrinkage of the cloth.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2 are a front sectional view and a side sectional view, respectively, showing a rotary drum type fully automatic washing machine embodying the washing method according to the present invention.

In these figures, reference numeral 1 denotes a washing machine main body, which is provided with a laundry input port 2 on the front surface. Reference numeral 3 denotes a water tub resiliently supported by a support rod 5 in the main body 1 of the washing machine, and an opening 4 provided on the front face is connected to the laundry inlet 2 of the main body 1 through a laundry inlet frame 6. Are in communication. The laundry slot 6 is formed of an elastic member, and when the door 7 closes the laundry slot 2 , the slot 6 is closed.

Numeral 8 is a rotary drum having a cylindrical body having a number of small openings 81 on the peripheral wall surface and having an opening 9 communicating with the opening 4 on the front surface thereof. 3, and is supported by a rotating shaft 10 rotatably supported on the rear wall of the water tank 3 so as to be horizontally rotatable thereafter. Three stirring blades 82 are provided on the inner wall surface of the rotary drum 8 at equal intervals in the circumferential direction.

A pulley 11 is fixed to an end of the rotary shaft 10 outside the water tank, and a drive motor 13
It is designed to receive rotation. Reference numeral 14 denotes a water supply valve connected to the water supply pipe 15, and 16 denotes a detergent case.
When the tap water is supplied through the water supply pipe 17 by opening 4, the contained detergent is dissolved and poured into the water tank 3 through the water supply pipe 18. 19 is one end of the water tank 3
Is a drainage pipe communicating with the bottom of the pipe, and a lint filter 20 and a drainage pump 21 are provided in the middle of the pipe.

A drying circulation duct 22 has upper and lower ends communicating with the water tank 3, and a drying unit 23 is provided in the middle thereof. The drying unit 23 is a well-known unit, and includes a blower and a heater (not shown),
At the time of the drying process, an air circulation loop is formed between the water tank 3 and the drying circulation duct 22 by driving the blower, and the air flowing through the loop is heated by a heater to dry the laundry, and the moisture captured from the laundry is dried. Is discharged outside the machine.

Reference numeral 24 denotes a tachometer which outputs pulses in synchronization with the rotation of the drive motor 13, and in this embodiment, outputs 16 pulses per rotation of the drive motor. Therefore, if the diameter ratio between the drive motor 13 and the pulley 11 is 1:12, 192 pulses (16 × 12 = 192) are output with one rotation of the rotary drum 8.

Reference numeral 25 denotes an operation panel provided on the front upper portion of the main body 1, and comprises an operation switch section 26 and a display section 27 as shown in FIG. 3, and the switch section 26 comprises a power switch 28, a start switch 29, a course Switch 30, drying switch 31, washing switch 32, reservation switch 33
And a water temperature switch 34.

The display unit 27 has a time display unit 35 for displaying water temperature, remaining time, reservation time, etc., for washing, rinsing, dehydrating, and so on.
A washing mode display unit 36 showing steps of a series of drying and blowing washing modes, and a course display unit 37 showing standard, elaborate, speed, dry, and blanket courses are provided.

Reference numeral 38 denotes a water level sensor, and reference numeral 39 denotes a circulation pump. Reference numeral 40 denotes a control circuit provided on the inner side of the operation panel 25. The control circuit 40 includes an operation switch section 26, a tachometer 24, and a water level switch 38 as shown in FIG.
A microcomputer (hereinafter referred to as a microcomputer) 41 which obtains signals from an input unit 43 such as a door switch (not shown) and a display unit 27 including a buzzer to execute various calculations and storage operations; And a drive circuit 42 for driving loads such as the drive motor 13, the water supply valve 14, the drain pump 21, the drying unit 23, and the circulation pump 39. The control circuit 40 is connected to a commercial power supply connector 45 via a power supply unit 43 and a power switch circuit 44.

The rotary drum type fully automatic washing machine of the present invention is constructed as described above. The operation of the dry course will be described below with reference to FIGS. 5, 6, 7, 8 and 9. explain. First, the door 7 is opened and laundry 46 such as wool that needs to be dry-washed is loaded into the rotating drum 8 from the laundry loading port 2. Then, the power switch 28 is turned on, the dry course is selected by the course switch 30, and the start switch 29 is turned on.

Then, in accordance with a command from the microcomputer 41, the water supply valve 14 is opened (ON), and tap water from the water supply pipe 15 dissolves the detergent in the detergent case 16 and is supplied into the water tank 3. The water level accompanying the water supply is detected by a water level sensor 38, and when the water level reaches a first water level (low water level) necessary for the first half of the washing process, the microcomputer 41 determines a signal from the water level sensor 38 and turns on the water supply valve 14. Close (OFF). In this state, the water level in the water tub 3 becomes I as shown in FIG. 5, and the laundry 46 is half-floated on the washing water. In this case, the microcomputer 41 forms water level control means together with the water level sensor 38.

Next, the microcomputer 41 drives (ON) the circulation pump 39 and also drives the drive motor 13 to start the first half of the washing step with a low water level. In this washing process, the rotating drum 8 is driven by the drive motor 13 to drive the stirring blade 8
The rotation speed is low (10 to 50 rpm) in the forward and reverse directions at an angle within a range of 2 to 3 times the mounting angle of 2.

In the present invention, in order to realize the rotation of the rotary drum 8, a pulse output from the tachometer 24 is used, and the rotation angle of the rotary drum 8 is detected based on the number of pulses. The rotation control means for controlling the rotation of the rotary drum 8 based on the signal of the rotation angle detection means is constituted by the microcomputer 41 and its peripheral circuits.

That is, as described above, in this embodiment, the tachometer 24 outputs 16 pulses during one rotation of the drive motor 13, and the diameter ratio between the pulley of the drive motor 13 and the pulley 11 of the rotary drum 8 is determined. Since the ratio is 1:12, the number of pulses of the tachometer per rotation of the rotary drum 8 is 192 (16 × 12), and the number of pulses per 120 ° of the mounting angle of the stirring blade 82 is 64.

Accordingly, the rotation angle detecting means detects the rotation angle of the rotary drum 8 by calculating the number of pulses, and the rotation control means controls the driving based on the signal from the rotation angle detecting means. By controlling the motor 13, the rotating drum 8 is controlled within an angle range of two to three times the mounting angle (within a range of 128 to 192 pulses).
Are repeatedly rotated in the forward and reverse directions (FIG. 6).

At this time, since the water level in the water tank 3 is low, the action of the stirring blade 82 based on the rotation of the rotary drum 8 causes
It is necessary to consider this point because a large mechanical force is applied to the laundry 46, which may cause cloth damage or shrinkage.

Therefore, in the present invention, in the first half of the washing process, for example, a rotation period of 2 seconds and a pause of 28 seconds are taken to suspend the rotation of the rotating drum. Moreover, during the first half of the washing process, the water level change in the water tank 3 is monitored during the 28-second rest period, and when the water level is stabilized, the drive motor 13 is operated for a short time to cause a change in the water flow in the water tank 3 to shake the water surface. In addition, the washing effect is improved by rubbing and washing with the waves on the water surface.

In the first half of the washing process in which the rotating drum is rotated within the range of two to three times the mounting angle of the stirring blade 82, the washing 46 penetrates enough washing water and sinks below the water surface. State. Such a rest period including the massage washing and the rotation operation of the rotary drum within a predetermined rotation angle are repeatedly performed during the set time of the first half washing process.

When the first half washing process is completed, the microcomputer 41 temporarily stops driving the drive motor 13 and turns on the water supply valve 14 again to supply water into the water tub 3 so as to shift the program to the second half washing process. Resume. Then, when the water level reaches a second water level II (higher than the first water level) shown in FIG. 7 and suitable for the latter half washing process, the microcomputer 41 receives a signal from the water level sensor 38 and turns off the water supply valve 14. In the state of the high water level II, as shown in FIG.
Is floating below the water surface, so that the laundry 46 does not come into contact with the stirring blades 82 (see the rotation miracle of the top of the stirring blade indicated by the dotted line) even when the rotating drum 8 rotates.

Next, the microcomputer 41 sets the OF of the water supply valve 14 to OFF.
When F is detected, the drive motor 13 is driven again to start the latter half washing step. The driving motor 1 in the latter half washing process
The drive control of No. 3 is different from the first half washing process. That is, in the latter half of the washing process, the rotation drum 8 is rotated to the minimum rotation angle (the stirring blade 8) by the operation of the rotation angle detection means and the rotation control means.
The drive motor 13 is rotated so as to rotate repeatedly at a mounting angle of 2 (120 °) and within twice the angle).

Therefore, the repetitive rotation of the rotary drum within the minimum rotation angle generates a water flow in the water tub 3 by the rotation of the stirring blade 82 accompanying the rotation, and the water flow causes the laundry 46 to flow to the stirring blade 82. Since the laundry 46 is weakened before contact, the laundry 46 rotates in the water tub, but the influence of the frictional force can be minimized.

In the latter half of the washing process, the laundry 4
In order to prevent the cloth 6 from being damaged or shrunk due to a large mechanical force applied to the rotating drum 6, a rotation period is taken for the rotation of the rotary drum similarly to the above-mentioned first half washing process, and the water tank 3 is closed during this pause time. Changes in the water level are monitored, and when the water level is stabilized, the drive motor 13 is minutely operated for a short time to generate a wave in the water tank. In addition, dilution and diffusion of unnecessary bubbles are also performed by the massage washing.

The above-described rest period including the massage washing and the rotation operation within the minimum rotation angle of the rotating drum are repeatedly performed during the set time of the latter half washing step. Then, when the set time has elapsed, the microcomputer 41 recognizes the end of the latter half washing step, and advances the program to the next intermediate dewatering step. In this intermediate dehydration step, first, the drain pump 21 is turned on to start draining the water in the water tank 3, and at the same time, the operation of the circulation pump 39 is stopped (OFF).

When the completion of drainage is detected, the microcomputer 41 drives the drive motor 13 at a low speed to rotate the rotary drum 8 at a low speed for a predetermined time (low speed dehydration), and then drives the drive motor 13 at a high speed to rotate the rotary drum 8. A high-speed rotation (high-speed dehydration) is performed to perform a dehydration operation. After the elapse of the high-speed dehydration time, the microcomputer 41 turns off the drive of the drive motor 13 and the drainage pump 21 and ends the intermediate dehydration process.

Incidentally, in the rotating drum type fully automatic washing machine as in the present invention, the rotating drum is normally rotated in a forward and reverse direction at a relatively low speed in order to prevent the laundry from being biased, and the laundry in the rotating drum is rotated. In this method, when the rotating direction of the rotary drum is switched, the selected object strongly hits the stirring blade, and there is a fear that the cloth may be damaged, lose its shape or shrink.

In the present invention, since laundry is intended for dry mark clothing, low-speed dehydration and high-speed dehydration only in one direction of the rotating drum are sequentially performed as described above, so that the laundry is firstly subjected to low-speed dehydration. By removing most of the water contained to reduce the amount of unbalance and then increasing the speed by high-speed dehydration, friction and collision between the laundry and the rotating drum are minimized. In addition, the rotation speed of the rotary drum 8 for the high-speed dehydration is reduced by half the rotation speed of the standard course.
It is done in.

When the intermediate dewatering process is completed, the microcomputer 41
Determines that the washing step has been completed, advances the program to the next rinsing step, turns on the water supply valve 14 and supplies water to the water tank 3. In this example, since the water level in this rinsing step is the same as the high water level in the latter half of the washing step, the water supply valve 14 is turned off when the high water level II is reached,
The circulation pump 39 is turned on again to circulate the water in the water tank. Then, in this rinsing process, the rotating drum 8 is rotated at a minimum rotation angle while including a rest period in the same manner as in the latter half of the washing process, and a minute rotation is repeatedly performed (rinsing operation is executed).

By repeating this minute rotation during the rinsing process, a wave is constantly generated on the water surface, so that the foaming due to the residual detergent can be diffused and diluted, and the rinsing performance can be improved. Can be prevented from remaining. When the time of the rinsing operation by the minute rotation of the rotating drum elapses, the program starts the intermediate dehydration process. In this dehydration mode, high-speed dehydration performed in the intermediate dehydration step after the washing step is not performed, and only low-speed dehydration in one direction of the rotating drum is performed.

Next, the microcomputer 41 advances the program to the final rinsing step, and executes the same operation as the rinsing operation up to the intermediate dewatering step in the rinsing step. Then, when the end rinsing step is completed, the microcomputer 41 advances the program to the next final dehydration step and executes final dehydration. This dehydration step is exactly the same operation as the intermediate dehydration step executed in the washing step. The above is a series of operation flows from the washing step of the dry mark clothing to the final dewatering step in the present invention.

[0049]

As described above, the washing method according to the first aspect of the present invention is provided on the front surface of the main body of the washing machine on the rotating drum supported in the water tub in the main body of the washing machine so as to be rotatable in the horizontal direction. the laundry from the laundry inlet was charged, the rotary drum together with the washing operation of the laundry wash separately the first and second halves of the two-stroke and the water level in the water tank to the first water level in the first half washing operation 1 Forward and reverse within a first rotation angle smaller than the rotation
Direction, and in the latter half of the washing cycle, the water level in the water tub is raised to a second level such that laundry that is higher than the first level floats .
And a washing method wherein the rotating drum is repeatedly rotated in the normal and reverse directions at a second rotation angle smaller than the first rotation angle to perform washing.

According to this method, during the first half of the washing process, the washing water can be quickly and evenly penetrated into the laundry and the rotation is minimized, so that no mechanical force is applied to the laundry. To increase the detergency. In the latter half of the washing process, the laundry is washed while floating in the water, so that the laundry is extremely less in contact with the stirring blades of the rotating drum, and the frictional force can be minimized.

Therefore, even if the laundry is dry mark clothing such as wool or silk, an optimal washing effect can be expected without damage or shrinkage of the cloth.

According to a second aspect of the present invention, in the washing method of the first aspect, the first rotation angle is provided in a depth direction of an inner wall surface in the rotating drum .
The angle of attachment of at least three or more stirring blades with respect to the rotation center axis is at least twice and within three times the attachment angle , and the second rotation angle is the mounting angle of the stirring blades with respect to the rotation center axis.
This is a washing method in which the rotating drum is rotated at an angle within twice the degree to wash the laundry.

Also in this method, as in the first aspect of the invention, the washing water can be quickly and evenly penetrated into the laundry in the first half of the washing process, and the rotation can be minimized. The detergency is increased by preventing mechanical force from being applied to objects. In the latter half of the washing process, the laundry is washed while floating in the water, so that the laundry is extremely less in contact with the stirring blades of the rotating drum, and the frictional force can be minimized.

Therefore, even if the laundry is dry mark clothing such as wool or silk, an optimal washing effect can be expected without damage or shrinkage of the cloth.

The washing method according to a third aspect of the present invention is the washing method according to the first aspect of the present invention, wherein the first half of the washing cycle and the second half of the washing cycle each include a rotation stop period of the rotating drum. This is a washing method in which the rotating drum is minutely driven to shake the water surface in the water tank.

Therefore, according to this method, a small driving force is applied to the rotating drum during a period in which the rotation of the rotating drum is stopped, and a wave is generated in the water in the water tub, and the laundry is washed in the same manner as in the case of massaging. In addition to being able to provide an effective action, the washing effect of the laundry can be enhanced by massaging and washing, the dilution and diffusion of unnecessary foam can be promoted, and the time required for washing can be reduced.

According to a fourth aspect of the present invention, there is provided a washing method comprising: a washing drum which is rotatably supported in a water tub in a washing machine main body; , The washing process of the laundry is divided into the first half and the second half, and during the first half of the washing, the water level in the water tub is set to the first water level and the rotating drum is rotated once.
At a small first rotation angle in the forward and reverse directions, and in the latter half of the washing cycle, the water level in the water tub is set to a second water level at which laundry higher than the first water level floats. The rotating drum is rotated at a second angle smaller than the first rotation angle.
The washing is performed by repeatedly rotating in the normal and reverse directions at the rotation angle of, and the dehydrating operation performed after the latter half of the washing process is divided into the operation before and after rotating the rotary drum in the same direction, and the latter is performed. characterized in that greater than the rotational speed during dewatering operation of the first half of the operation, and to perform by rotating the rotary drum at a rotation speed lower than the rotational speed of the standard course
A standard course and a dry mark clothing wash
Washing dry mark clothing in a washing machine with
This is the course washing method.

Therefore, according to this method, especially in the dehydrating operation, the rotating drum is rotated in the same direction in the first half and the latter half of the drying operation. While the minimum amount of water is removed, most of the moisture is removed, and the rotating drum is rotated at a higher speed in the latter half of the dehydrating operation than in the first half of the dehydrating operation, thereby further enhancing the dehydrating effect. As a result, there is no longer the tendency of the laundry to be opened during dehydration, and the laundry can be washed well without damage to the cloth, loss of shape, shrinkage and the like.

According to a fifth aspect of the present invention, there is provided a rotary drum type fully automatic washing machine, wherein a laundry is provided on a front surface of the washing machine main body on a rotating drum supported in a water tub in the washing machine main body so as to be rotatable in a horizontal direction. A tachometer provided in a drive motor for rotating the rotary drum and for generating pulses in accordance with the rotation of the drive motor, wherein the number of pulses output by the tachometer; Rotation angle detecting means for detecting the rotation angle of the rotating drum, and controlling the driving of the drive motor in response to a signal obtained from the rotation angle detecting means to rotate the rotating drum once.
Remote small first rotation angle and a positive within a small second rotation angle from the rotation angle of the first, and rotation control means for repeating rotation in the reverse direction, the water level in the water tank first water level and the First
Water level control means for controlling the laundry to a second water level at which the laundry higher than the water level floats. In the first half of the laundry, the water in the water tub is set to the first water level and rotated. Move the drum forward or backward within the first rotation angle
In the washing cycle in the second half, the water level in the water tub is set to the second water level, and the rotating drum is repeatedly rotated in the normal and reverse directions within the range of the second rotation angle, so that the washing cycle is repeated. The configuration is such that it is executed.

According to this configuration, the rotation angle of the rotary drum can be reliably detected by the number of pulses output from the tachometer, and the rotation angle of the rotary drum can be reliably controlled during the washing process. Also, the water level in the water tank can be reliably controlled.

Therefore, in the first half of the washing process, the washing water can be quickly and evenly penetrated into the laundry and the rotation is minimized, so that no mechanical power is applied to the laundry so that the washing power is reduced. Can be increased.
In the latter half of the washing process, the laundry is washed while floating in the water, so that the laundry is extremely less in contact with the stirring blades of the rotating drum, and the frictional force can be minimized.

Therefore, even if the laundry is dry mark clothing such as wool or silk, an optimal washing effect can be expected without damage or shrinkage of the cloth.

[Brief description of the drawings]

FIG. 1 is a schematic front sectional view of a rotary drum type fully automatic washing machine embodying a washing method according to the present invention.

FIG. 2 is a schematic side sectional view of a rotary drum type fully automatic washing machine embodying the washing method according to the present invention.

FIG. 3 is a view showing an operation panel of a rotary drum type fully automatic washing machine embodying the washing method according to the present invention.

FIG. 4 is a block electric circuit diagram showing a control circuit in a rotary drum type fully automatic washing machine embodying the washing method according to the present invention.

FIG. 5 is a view showing a state in which a rotating drum is stopped in a first half washing process of a rotating drum type fully automatic washing machine embodying a washing method according to the present invention.

FIG. 6 is a view showing a state in which a rotating drum is rotated by about 120 ° in a first half washing process of a rotating drum type fully automatic washing machine embodying a washing method according to the present invention.

FIG. 7 is a view showing a state in which the rotating drum is stopped in the latter half of the washing step of the rotating drum type fully automatic washing machine embodying the washing method according to the present invention.

FIG. 8 is a view showing a state in which the rotating drum is minutely driven in the latter half of the washing process of the rotating drum type fully automatic washing machine embodying the washing method according to the present invention.

FIG. 9 is a flowchart illustrating an operation of washing the laundry of dry mark clothing in a rotating drum type fully automatic washing machine embodying the washing method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Laundry inlet 3 Water tank 8 Rotary drum 13 Drive motor 14 Water supply valve 24 Tachometer 38 Water level sensor 39 Drain pump 40 Control circuit 41 Microcomputer 46 Laundry

Continuation of front page (56) References JP-A-9-276658 (JP, A) JP-A-1-277596 (JP, A) JP-A-6-335596 (JP, A) JP-A-54-58962 (JP) , A) Hira 3-30977 (JP, U) JP-B 63-12639 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 33/02 D06F 37/04

Claims (5)

(57) [Claims] 1. A laundry is loaded into a rotating drum supported in a water tub in the washing machine main body so as to be rotatable in a horizontal direction from a laundry loading port provided on a front surface of the washing machine main body. In the first half of the washing cycle, the water level in the water tank is set to the first water level and the rotating drum is rotated within a first rotation angle smaller than one rotation.
Positive, the degree cycled rotated in the reverse direction, and the higher the laundry than the first water level the water level in the water tank in the second half of the washing operation floating
Laundering as well as to the second water level, characterized in that so as to wash the rotary drum at a smaller second rotational angle than the first rotation angle positive and repeated <br/> rotated in the reverse direction Method. Wherein the first rotation angle in the rotary drum
At least two times the mounting angle of the stirring blade with respect to the rotation center axis of at least three or more blades provided in the depth direction of the inner wall surface.
And and 3 times within the angle, characterized in that so as to wash the second rotation angle by rotating the rotary drum as an angle within 2-fold of the mounting angle of relative rotation center axis of the stirring blade laundry The washing method according to claim 1. 3. The method according to claim 1, wherein a rotation stop period of the rotary drum is provided in each of the first half washing step and the second half washing step, and the rotary drum is minutely driven during the stop period to shake the water surface in the water tank. The washing method according to claim 1 or 2, wherein the washing method is performed. 4. A laundry is loaded into a rotating drum supported in a water tub in the washing machine main body so as to be rotatable in a horizontal direction from a laundry loading port provided on a front surface of the washing machine main body. In the first half of the washing cycle, the water level in the water tub is set to the first water level and the rotating drum is rotated at a first rotation angle smaller than one rotation.
Positive, the degree cycled rotated in the reverse direction, and the higher the laundry than the first water level the water level in the water tank in the second half of the washing operation floating
And the washing is performed by repeatedly rotating the rotary drum in the forward and reverse directions at a second rotation angle smaller than the first rotation angle, and washing in the latter half of the washing process. The spinning operation to be performed after the end is divided into front and rear operations performed by rotating the rotary drum in the same direction, and the spinning speed in the second half is higher than the spinning speed in the first half and lower than the rotation speed of the standard course. The standard course and the dry machine , characterized in that the rotary drum is rotated at
Dora in a washing machine having a course for washing clothing
Washing method of course to wash Imark clothing . 5. A washing machine according to claim 1, wherein laundry is thrown into a rotating drum supported in a water tub in the washing machine main body so as to be rotatable in a horizontal direction, through a laundry throw-in opening provided on a front surface of said washing machine main body. A tachometer provided on a drive motor for rotating the rotary drum and generating a pulse in accordance with the rotation of the drive motor; and a rotation angle detecting means for detecting the rotation angle of the rotary drum from the number of pulses output from the tachometer. And controlling the drive of the drive motor in accordance with a signal obtained from the rotation angle detection means to move the rotary drum to 1
Rotation control means for repeatedly rotating in the forward and reverse directions within a range of a first rotation angle smaller than the rotation and a second rotation angle smaller than the first rotation angle, and adjusting a water level in the water tank. A water level control means for controlling a first water level and a second water level at which the laundry higher than the first water level floats , wherein the water level in the water tub is controlled in a first half of the laundry washing cycle; Set the rotating drum at the first water level and within the range of the first rotating angle.
In the latter half of the washing step, the water level in the water tub is set to the second water level, and the rotating drum is repeatedly rotated in the normal and reverse directions within the range of the second rotation angle. A rotating drum type fully automatic washing machine characterized by performing a washing process.