JP2000107485A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the generation of vibration and noise of a washing-cum- hydroextracting vessel by performing an operation for correcting laundry having gathered in one side before a bubble-removing and spin-drying operation at the time of operating a rinsing processsingly, and performing an operation for correcting laundry having gathered in one side before a hydroextraction operation at the time of singly operating the hydroextraction step. SOLUTION: A laundry is put in a washing-cum-hydroextracting vessel 4 and a start switch on a control panel 20 is turned on, a pulsator 5 is rotated by a motor 7. A load at that time is detected based on an electric current value or the like of the motor 7 and an amount of laundry is detected. Next, a water-feeding valve 18 is opened to feed water corresponding to the amount of laundry. When the water is fed to a specified water level, the pulsator 5 is rotated in forward and reverse directions and washing operation is performed. When a rinsing step is performed thereafter, an operation for correcting the laundry having gathered in one side is performed by rotating the pulsator 5 in a reversing period wherein forward and reverse rotating time and a time for suspension are shorter than those of the washing operation, thereby generation of vibration and noise is prevented at the time of the following bubble-removal and hydroextraction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine, and more particularly to a washing machine capable of independently operating each of a washing step, a rinsing step, and a dewatering step.

[0002]

2. Description of the Related Art A conventional fully automatic washing machine is provided with a washing and dewatering tub, and a washing step, a rinsing step, and a dehydrating step are sequentially performed in sequence. In addition, some of the above steps can be performed independently. The operation of the washing machine is as shown in the flowchart of FIG.

First, when the start switch is turned on at # 110, the pulsator (agitating blade) rotates at # 120,
The amount of laundry is detected by the load of the drive motor at that time. Next, at # 130, the water level according to the amount of the laundry is determined, and the water supply amount is displayed. When the detergent according to the amount of water supply is put in by the user, the upper lid of the washing and dewatering tub is closed, and in # 140, the water supply operation is performed to the water level, and # 1 is performed.
At 50, the washing operation of the laundry is executed.

[0004] When the washing operation is completed, an offset correcting operation is performed in step # 160. The offset correction work is performed at the time of defoaming and dewatering when the laundry is offset in the washing and dewatering tub (# 250).
This is performed in order to prevent vibration and noise generated in the device from being increased. When the offset correction operation is completed, it is determined in step # 170 whether or not to continuously perform the rinsing process based on the contents set in advance by the user, and when only the rinsing process is performed, the process ends (# 400).

When the continuous operation is performed, the washing water in the washing and dewatering tub is drained at # 240, and the washing and dewatering tub is rotated at a high speed at # 250 to perform a dewatering operation for removing bubbles. Next, # 26
At 0, water is supplied into the washing and dewatering tub, and at # 270, rinsing operation is performed. When the rinsing operation is completed, a deviation correcting operation is performed in # 280. The offset correction work is performed to prevent vibration and noise generated during the dehydration work (# 340), as described above.

When the offset correction operation is completed, it is determined in step # 290 whether or not the dehydration process is to be performed continuously based on the contents set by the user in advance.
0). When the continuous operation is performed, the washing water in the washing and dewatering tub is drained in # 330, and the washing and dewatering tub is rotated at a high speed in # 340 to perform the dewatering operation, and all the processes are completed.

If the user sets in advance to operate each step independently, it is determined whether the operation is an independent operation in # 170 and # 290, and the process is terminated (# 400). Then, after a part of the laundry in the washing and dewatering tub is partially removed or the laundry is added, when the start switch is pressed again (# 210,
# 310), the next step is performed.

[0008]

However, if the washing process or the rinsing process is operated alone to perform the offset correction work and then a part of the laundry is taken out or added,
Improperly balance the laundry in the washing and dewatering tub. Also,
Even when the laundry sinks in the washing and dewatering tub due to the lapse of time after the end of the independent operation, the balance of the laundry in the washing and dewatering tub is deteriorated. For this reason, there has been a problem that vibration and noise are increased during the defoaming and dewatering operations in the next step (rinse step or dewatering step).

It is an object of the present invention to provide a washing machine capable of preventing vibration and noise of a washing and dewatering tub when the rinsing step or the dehydrating step is operated alone.

[0010]

In order to achieve the above object, the invention described in claim 1 has a washing and dewatering tub,
In a washing machine in which each of the washing step, the rinsing step, and the dewatering step can be operated independently, when the rinsing step is operated independently, the deviation correction work for correcting the deviation of the laundry before the defoaming operation is performed. The present invention is characterized in that the offset correction work is performed before the spin-drying operation when the spin-drying step is operated independently.

According to this configuration, when the rinsing step is performed alone, the offset correction operation is performed when the rinsing step is started, and then the defoaming and dewatering operation is performed to perform the rinsing operation. Also, when the dehydration step is performed alone,
After the dehydration process is started, after the offset correction work is performed,
Dehydration work is performed.

According to a second aspect of the present invention, in the washing machine according to the first aspect, the washing and dewatering tub is provided with a water level detecting means for detecting a water level of the washing and dewatering tub. When the water level is lower than the water level, the offset correction work is stopped.

According to this configuration, when the rinsing step is performed alone and the rinsing step is started, the water level in the washing and dewatering tub is detected. When the water level is lower than the predetermined water level, the defoaming and dewatering operation is performed. When the water level has reached the predetermined water level, the offset correction operation is performed and then the defoaming and dewatering operation is performed. In addition, when the dehydration step is performed alone and the dehydration step is started, the water level of the washing and dewatering tub is detected. When the water level is lower than the predetermined water level, the dewatering operation is performed. When the water level has reached the predetermined water level, the offset correction operation is performed, and then the dewatering operation is performed.

According to a third aspect of the present invention, in the washing machine according to the first aspect, the washing and dewatering tub is provided with a water level detecting means for detecting a water level of the washing and dewatering tub. When the water level is lower than the water level, the offset correction work is performed after water is supplied.

According to this configuration, when the rinsing step is performed when the rinsing step is performed alone, the water level of the washing and dewatering tub is detected. If the water level is lower than the predetermined water level, the water is supplied to the predetermined water level, and then the offset correction operation is performed to perform the defoaming and dewatering operation. Also, when the dehydration step is performed alone,
When the dehydration step is started, the water level of the washing / dewatering tub is detected. If the water level is lower than the predetermined water level, the water is supplied to the predetermined water level, and then the offset correction operation is performed to perform the dewatering operation.

According to a fourth aspect of the present invention, in the washing machine according to the first aspect, the reversal cycle of the pulsator in the offset correction operation is different from the reversal cycle of the pulsator in the washing operation and the rinsing operation. It is characterized by having.

According to this configuration, when the rinsing step is performed alone, when the rinsing step is started, the pulsator is rotated forward and reverse at a reversal cycle different from that in the washing operation and the rinsing operation, and the deviation correcting operation is performed. Thereafter, a defoaming operation and a rinsing operation are performed. In addition, when the dewatering process is performed alone, when the dewatering process is started, the pulsator is rotated forward and reverse at a reversal cycle different from that in the washing operation and the rinsing operation to perform the offset correction work. Will be

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a washing machine according to a first embodiment of the present invention. A water tub 2 is hung by an anti-vibration mechanism 3 inside the outer box 1, and a washing and dewatering tub 4 is arranged inside the water tub 2. The washing and dewatering tub 4 has an opening 41 for the laundry in the upper part, and the opening 41 is opened and closed by the upper lid 6 rotatably supported on the upper surface plate 19. A pulsator 5 is provided at the inner bottom of the washing and dewatering tub 4, and a speed reduction mechanism 8 and a clutch mechanism 1 provided at a lower portion of the water tub 2 are provided.
2, the rotation of only the pulsator 5 and the rotation of the washing and dewatering tub 4 can be switched and executed.

In the lower part of the water tank 2, in addition to the above-described speed reduction mechanism 8, a drive motor 7, a main pulley 9 fixed to a motor shaft 7 a of the drive motor 7, and a driven pulley 11 fixed to a driven shaft of the speed reduction mechanism 8. A belt 10 for transmitting the rotation of the driving pulley 9 to the driven pulley 11, and the rotational force of the driving motor 7 is transmitted to the reduction mechanism 8 via the driving pulley 9, the belt 10 and the driven pulley 11. I have.

A drain valve 13 and a drain hose 14 are provided at the end of the water tank 2 to form a drain passage.
An air trap 15 is formed at the bottom of the air trap, and a water level sensor 17 is connected to the air trap 15 via a pressure guiding pipe 16. The water level sensor 17 is disposed in the upper surface plate 19 together with the water supply valve 18. Top plate 1
An operation panel 20 for performing a washing operation is provided at a front portion of 9, and a control circuit 21 including a microcomputer or the like is provided on an inner surface thereof.

The operation of such a washing machine will be described with reference to the flowchart of FIG. First, the laundry is put into the washing / dewatering tub 4 from the input port 41, and the operation panel 2 is set in # 110.
When the start switch arranged at 0 is turned on, # 12
0, the pulsator 5 is rotated by the drive of the drive motor 7,
The amount of laundry is detected by detecting the load at that time based on the number of revolutions of the drive motor 7, the current value, and the like. Next, at # 130, the water level according to the amount of the laundry is determined by the operation of the control circuit 21, and the water supply amount is displayed on a display unit (not shown) arranged on the operation panel 20.

When the user puts in a detergent corresponding to the amount of water supplied, the upper lid 6 is closed, the water supply valve 18 is opened at # 140 to supply water, and the water supply is stopped when the water level sensor 17 detects a predetermined water level. . Then, in step # 150, the pulsator 5 rotates forward and backward at a predetermined reversal cycle, and the washing operation of the laundry is performed. When the washing operation is completed, it is determined whether or not the rinsing process is to be continuously performed in # 170 based on the content set in advance by the user through the operation panel 20. If only the washing process is to be performed, the process ends (# 400).

When the continuous operation is performed, the operation proceeds to the rinsing step, and #
At 230, the offset correction operation is performed by rotation of the pulsator 5 to prevent vibration and noise during the defoaming operation (# 250). The rotation of the pulsator 5 is a washing operation (#
150) and the reversing period in the rinsing operation (# 270), the rotation time and the pause time of the forward / reverse rotation are shorter, and the reversing period is shortened. Thus, the laundry that is entangled and biased is corrected in a short time with good balance.
The rotation speed of the pulsator 5 may be increased, or the rotation time and rotation speed may be different between forward rotation and reverse rotation by detecting the load on the drive motor 7 during forward and reverse rotation.

When the offset correcting operation is completed, the drain valve 13 is opened at # 240 to drain the washing water in the washing and dewatering tub 4 and #
At 250, the washing and dewatering tub 4 is rotated at a high speed to perform a dewatering operation for removing bubbles. Next, in step # 260, the drain valve 13 is closed and the water supply valve 17 is opened to supply water into the washing and dewatering tub 4. When the predetermined water amount is detected by the water level sensor 17, the water supply is stopped. And the rinsing operation is performed in the normal / reverse direction at the reverse cycle.

When the rinsing operation is completed, it is determined in step # 290 whether or not the dehydration step is to be continuously performed based on the contents set in advance by the user. If not, the operation is terminated (# 40).
0). When the continuous operation is performed, the process proceeds to the dehydration step, and a deviation correcting operation is performed in # 320 to prevent vibration and noise generated during the dehydration operation (# 340). Then, in step # 330, the drain valve 13 is opened to drain the washing water in the washing and dewatering tub 4, and in step # 340, the washing and dewatering tub 4 is rotated at a high speed to perform the dewatering operation, and all the steps are completed.

If the user sets in advance to operate each step independently, it is determined whether the operation is the single operation in # 170 and # 290, and the process is terminated (# 400). Then, after a part of the laundry in the washing and dewatering tub 4 is partially taken out or the laundry is added, if the start switch is pressed again in # 210, # 310, the next process is started, and # 230, # At 320, an offset correction operation is performed. Then, # 240, # 33
At 0, the drain valve 13 is opened to drain the washing water in the washing and dewatering tub 4, and at # 250 and # 340, the washing and dewatering tub 4 is rotated at a high speed to perform the defoaming or dewatering operation. ing.

As described above, when the rinsing step and the dehydrating step are operated independently, the offset correction operation is performed, and then the defoaming or dewatering operation is performed. There is no need to consider the deterioration of the balance of the laundry in the washing and dewatering tub 4 due to the addition of the laundry. Also,
The deterioration of the balance due to the sinking of the laundry in the washing and dewatering tub 4 due to the lapse of time after the end of the single operation in the preceding step is suppressed. Therefore, it is possible to prevent vibration and noise during the defoaming operation and the dewatering operation.

FIG. 3 is a flowchart for explaining the operation of the rinsing step of the washing machine according to the second embodiment of the present invention. The washing process is the same as in FIG. When the rinsing step is performed alone, the washing step is determined at # 170 (see FIG. 2) as to whether or not the operation is the single operation, and the cleaning step is terminated (# 400). Then, after a part of the laundry in the washing and dewatering tub 4 is partially removed or the laundry is added, when the start switch is pressed again in # 210, the rinsing step is started, and in # 215, the washing and dewatering tub 4 is started.
Is detected by the water level sensor 17.

At step # 220, the detection result is judged, and the water level becomes # 1.
When the water level is lower than the predetermined water level determined at 30 (see FIG. 2), drainage is performed at # 240 and defoaming and dewatering work is performed at # 250 without performing the offset correction work. The operation is performed. By doing in this way, when the amount of water in the washing and dewatering tub 4 is reduced by the work performed by the user after the washing process is completed, it is possible to prevent the laundry from being damaged by the offset correction work. . In the dewatering step, similarly, the water level of the washing and dewatering tub 4 is detected before the dewatering operation, and if the water level is lower than the predetermined water level, the offset correction operation is not performed.

FIG. 4 is a flowchart for explaining the operation of the rinsing step of the washing machine according to the third embodiment of the present invention. The washing process is the same as in FIG. The rinsing process is # 2
When the start switch is pressed at 10, the rinsing process is started, and at # 215, the water level of the washing and dewatering tub 4 is
7 is detected.

At step # 220, the detection result is judged, and the water level is set at # 1.
When the water level is lower than the predetermined water level determined at 30 (see FIG. 2), the water supply valve 18 is opened at # 225. The predetermined water level may be determined again by rotating the pulsator 5 for a predetermined time and by the load of the drive motor 7 at that time. When the water is supplied to the predetermined water level, the water supply is stopped, and the offset correction work is performed in # 230. Then, drainage is performed in # 240 and # 2 is performed.
At 50, the defoaming operation is performed, and the same operation as that of FIG. 2 is performed.

In this manner, when the amount of water in the washing and dewatering tub 4 is reduced by the work performed by the user after the washing process is completed, the cloth is prevented from being damaged by the offset correction work. At the same time, vibration and noise during the defoaming and dewatering operation can be prevented. In the dewatering step, similarly, the water level of the washing and dewatering tub 4 is detected before the dewatering operation, and if the water level is lower than the predetermined water level, water is supplied.

[0033]

According to the first aspect of the present invention, when the rinsing step and the dewatering step are operated independently, the offset correction operation is performed, and then the defoaming dewatering operation or the dewatering operation is performed. It is not necessary to consider the deterioration of the balance of the laundry in the washing / dewatering tub due to partial removal of the laundry or addition of the laundry. In addition, the deterioration of the balance due to the sinking of the laundry in the washing and dewatering tub due to the lapse of time after the end of the single operation in the preceding step is suppressed. Therefore, it is possible to prevent vibration and noise during the defoaming operation and the dewatering operation.

According to the second aspect of the present invention, when the rinsing step and the dewatering step are operated independently, when the amount of water in the washing and dewatering tub is reduced by the work performed by the user after the end of the previous step, the offset is corrected. Cloth damage to the laundry caused by performing the work can be prevented.

According to the third aspect of the present invention, when the rinsing step and the dewatering step are operated independently, if the amount of water in the washing and dewatering tub decreases due to the work performed by the user after the end of the previous step, the offset is corrected. It is possible to prevent the laundry from being damaged by the work, and to prevent vibration and noise during the defoaming and dewatering operations and during the dewatering operation.

According to the fourth aspect of the present invention, it is possible to correct the laundry entangled in the washing and dewatering tub in a short time with good balance.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing an operation of the washing machine according to the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation of the washing machine according to the second embodiment of the present invention.

FIG. 4 is a flowchart illustrating an operation of the washing machine according to the third embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the conventional washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer box 2 Water tank 4 Washing and dewatering tank 5 Pulsator 6 Top lid 7 Drive motor 8 Reduction mechanism 12 Clutch mechanism 13 Drain valve 17 Water level sensor 18 Water supply valve 20 Operation panel 21 Control circuit

Claims (4)

[Claims] 1. A washing machine having a washing and dewatering tub and capable of independently operating each of a washing step, a rinsing step, and a dehydrating step. A washing machine which performs a shift correction operation for correcting a shift of laundry and performs the shift correction operation before the spin-drying operation when the spin-drying step is operated alone. 2. A water level detecting means for detecting a water level of the washing and dewatering tub, wherein the offset correction work is stopped when a water level of the washing and dewatering tub is lower than a predetermined water level. The washing machine according to claim 1, wherein 3. A water level detecting means for detecting a water level of the washing and dewatering tub, wherein when the water level of the washing and dewatering tub is lower than a predetermined water level, the offset correction work is performed after water is supplied. The washing machine according to claim 1, characterized in that: 4. The washing machine according to claim 1, wherein a reversing cycle of the pulsator during the offset correcting operation is different from a reversing cycle of the pulsator during a washing operation and a rinsing operation.