JPH10272283A - Fully automatic washing machine - Google Patents

Abstract

(57) [Problem] To provide an object of the present invention to suppress unevenness of cloth to eliminate uneven washing and reduce vibration and noise caused by unevenness of cloth during dehydration. SOLUTION: The rotation state detecting means detects the rotation state of the pulsator 2 at each time of stirring, and based on the detection result, the duration of a short-time forward / reverse rotation cycle or the duration of a long-time forward / reverse rotation cycle. The ratio is determined so as to determine any one of the ratios of the duration of the short-time forward / reverse rotation cycle to

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine capable of suppressing unbalance (bias) of cloth in a washing tub.

[0002]

2. Description of the Related Art In a normal fully automatic washing machine, a pulsator is started after cloth is introduced, a rotation state of a pulsator is detected before water is supplied, a water amount, a detergent amount, and a stirring time limit are determined. The state is detected, a correction is made to the stirring time limit, and a control operation is performed based on the rotation state data. As the basic control for eliminating the unevenness of the cloth, measures such as providing a short-cycle forward / reverse loosening step at the end of the washing / rinsing step and periodically repeating a long / short time period are taken.

[0003]

However, in the above-mentioned control for eliminating the bias of the conventional cloth,
It is difficult to eliminate the unevenness of the already hardened cloth, and it is not always an effective means. Further, in the above control, although effective under certain conditions (constant bath ratio), when the bath ratio varies under a certain water level,
For example, (a) the variation of the bath ratio in the setting caused by setting the cloth at a width such as 4 to 5 kg at the same water level, and (b) the bath ratio when it is determined that a large amount of wet cloth is thrown. (C) Variations in bath ratio when a water level other than the predetermined level is selected by the user setting, etc., it is not possible to obtain an appropriate combination of the forward and reverse rotation time periods, and the bias of the cloth is effective. Was difficult to resolve.

[0004] The present invention has been made in view of the above,
It is an object of the present invention to provide a fully automatic washing machine capable of suppressing unevenness of cloth, having no washing unevenness, and reducing vibration and noise caused by unevenness of cloth during dehydration.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a rotation state detecting means for detecting a rotation state of a pulsator, and a step of washing or rinsing by stirring the pulsator. A fully automatic washing machine that alternately performs a long time forward / reverse rotation cycle and a short time forward / reverse rotation cycle, wherein the rotation state detection means detects a rotation state of the pulsator at each stirring and detects the rotation state. The gist of the present invention is to determine either the short time duration or the ratio of the short time duration to the long time duration based on the result. With this configuration, if the cloth in the washing tub is uneven, the rotation speed of the pulsator will vary. In the long time period or short time period, it is determined whether or not the cloth is biased based on the rotating state of the pulsator.If there is a cloth bias, the duration of the short time period is determined to be the required large time, or The ratio of the duration of the short time period to the duration is determined to a required large value. Thereby, it becomes possible to suppress the unevenness of the cloth.

According to a second aspect of the present invention, in the fully automatic washing machine according to the first aspect, the rotation state of the pulsator is detected at an early stage of a washing or rinsing process, and the short time period is set based on the detection result. The gist of the present invention is that the number of rotations is determined. With this configuration, when the cloth amount is smaller than the predetermined bath ratio, the rotation amount increases because the probability of directly acting as a load on the pulsator decreases due to the cloth floating. At the beginning of the washing or rinsing process, the presence or absence of cloth floating is determined based on the rotation state of the pulsator. If the cloth is floating, the rotation speed in the short time period is determined to be reduced to a required value. Thereby, it becomes possible to suppress the cloth imbalance as described above.

According to a third aspect of the present invention, in the fully automatic washing machine according to the first aspect, the rotation state of the pulsator is detected at an early stage of the washing or rinsing process, and the short time period is set based on the detection result. The gist is that the correction is made to either the duration or the ratio of the duration of the short period to the duration of the long period.
With this configuration, it is determined whether or not the cloth is biased from the rotating state of the pulsator at the beginning of the washing or rinsing process, and when the cloth is biased, the duration of the short time period is extended by the required time with respect to the initial setting value. Or the ratio of the duration of the short time period to the duration of the long time period is increased by a required value from the initial setting value. As a result, it is possible to eliminate the unevenness of the cloth before it becomes strong.

According to a fourth aspect of the present invention, in the fully automatic washing machine according to the first aspect, the rotation state of the pulsator is detected during the short time period of operation, and the short time period is determined based on the detection result. The gist of the present invention is to determine the end time of the time duration. With this configuration, it is determined whether or not there is a non-uniformity of the cloth from the rotation state of the pulsator during the short time period, and when there is a non-uniformity of the cloth, it is determined that the end of the short time period is extended by a required value. As a result, it is possible to eliminate the unevenness of the cloth at an early stage before the unevenness of the cloth does not increase.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. The fully automatic washing machine according to the present embodiment has a short-time forward / reverse cycle for eliminating the bias of the cloth (cloth entanglement), and a long-time forward / reverse cycle for promoting the upside-down of the cloth in the washing tub and having a high cleaning effect.・ Reverse rotation cycle is alternately repeated to eliminate the cloth bias before it becomes strong, and to determine the duration of the short time period for the solution based on the variation data of the pulsator rotation speed during the long time period or the short time period. That is what we are trying to judge.

First, the configuration of a fully automatic washing machine will be described with reference to FIG. 1 is a washing tub also serving as a dehydration tub, 2 is a pulsator provided at the bottom of the washing tub 1, 3 is a motor for driving the pulsator 2, and the rotational force of the motor 3 is applied to the pulsator 2 via the mechanism 4 and the like. To be transmitted. FIG.
Although not shown in the drawings, a fully automatic washing machine includes, in addition to these, a rotation speed detection device serving as rotation state detection means for detecting a rotation state of the pulsator 2, and a rotation level detection device for detecting a water level in the washing tub 1. A water level sensor serving as a water level detecting means and a cloth amount detecting means are provided. As the rotation speed detecting device, for example, a device in which a Hall element is installed in the motor 3 or the mechanism portion 4 and a magnet is arranged in the rotating portion is used, and a pressure sensor or the like is used as the water level sensor. 5 is a cloth (laundry).

FIG. 2 shows a control system. The control circuit 10 including a CPU includes a display unit 6 for displaying a power-on state, an operation state of the fully automatic washing machine, and the like, information for turning on / off the fully automatic washing machine and controlling the operation state. A key input means 7 including various operation keys for inputting a command, a water level detecting means 8, a rotation state detecting means 9 and a cloth amount detecting means 11 are connected. The control circuit 10 also controls the motor 3, the water supply valve 13, and the drain valve 1 via the load control unit 12.
4 is connected.

The fully automatic washing machine according to the present embodiment is configured as described above, and operates so as to suppress unevenness of cloth (cloth entanglement) and uniformize the entire inside of the washing tub. As a washing method to suppress the unevenness of the cloth, long-time forward / reverse cycle and short-time forward / reverse cycle are alternately repeated, and the unevenness is eliminated by short-time forward / reverse cycle before strong unevenness occurs. Is valid. For example, a long time forward / reverse rotation cycle of 1.5 second rotation and 1.0 second stop is 2 minutes → a 0.8 second rotation and a short time forward / reverse rotation cycle of 0.6 second stop 1 minute → 1. Long-time forward / reverse cycle with 5 seconds rotation and 1.0-second pause for 2 minutes → 0.8 seconds rotation, short-time forward / reverse cycle with 0.6-second pause for 1 minute → ...・ Short-period forward / reverse cycle is repeated alternately,
Eliminates bias during the reverse rotation cycle.

First, a method of detecting a bias will be described with reference to the flowchart of FIG. After the rotation of the pulsator 2 starts (step 101), the number of rotations of the pulsator 2 during normal rotation is detected (step 102), and the difference between the number of rotations of the pulsator 2 during normal rotation and the previous rotation is accumulated three times. R
n is obtained (step 103). Then, when the integrated value Rn is equal to or more than the predetermined threshold value Rx, it is determined that there is a bias (step 104). As described above, it is determined whether or not there is a bias from the variation data of the rotation speed of the pulsator 2.

Next, each control method for eliminating or suppressing the unevenness of the cloth will be described in order.

The first control method will be described with reference to the flowchart of FIG. The above-described long-period normal / reverse rotation cycle and short-period normal / reverse rotation cycle are alternately repeated to detect the bias of the cloth during the short time period. That is, after a lapse of a predetermined time, for example, 30 seconds from the start of the short time period (steps 201 and 20).
2), the deviation of the cloth is detected by the method described in the flowchart of FIG. 3 (step 203). The initial setting is to continue the short-time forward / reverse rotation cycle for one minute, and when it is determined that there is a bias in the latter half of the one minute (Yes in step 204), one more minute is added to the initial minute.
A minute is added (step 205). As described above, when it is determined that there is a bias, by extending the normal / reverse cycle duration of the short time period, it is possible to resolve the bias (cloth entanglement) earlier without increasing the bias.

The second control method will be described with reference to the flowchart of FIG. The above-described long-period normal / reverse rotation cycle and short-period normal / reverse rotation cycle are alternately repeated to detect the bias of the cloth during the long time period. That is, after a lapse of a predetermined time, for example, one minute from the start of the long time period (steps 301 and 30).
2), the deviation of the cloth is detected by the method described in the flowchart of FIG. 3 (step 303). The initial setting of the short time period forward / reverse rotation cycle is to be continued for one minute. If it is determined that there is a bias in the latter half of the long time period of two minutes (Yes in step 304), the short time period initial setting time 1 is set.
One minute is added to the minute to obtain two minutes (step 30).
5). If it is determined that there is no bias (N in step 304)
o), the duration of the short time period is 1 minute with the initial setting (step 306). As described above, when the bias is determined, by extending the duration of the short-time forward / reverse cycle, the bias can be resolved before the bias becomes strong.

The third control method will be described with reference to the flowchart of FIG. In this control method, when it is determined that there is a bias in the second control method (or the first control method) (Yes in steps 401 to 404),
Make changes to both the following short and long durations. That is, when it is determined that there is a bias (Ye in step 404)
s) The short period is increased from the initial setting time of 1 minute to 1.5 minutes, and the ratio is increased, and the long period is reduced from the initial setting time of 2 minutes to 1.5 minutes, and the ratio is reduced. If it is determined that there is no bias (No in Step 404), the durations of the short and long time periods are each kept at the initial settings (Step 406). In this way, when determining that there is a bias, the duration of the short period in which the bias is eliminated is extended, and the duration of the long period in which the probability of occurrence of the bias is high is shortened. By correcting so as to increase the ratio of the continuation time, it is possible to surely eliminate this before the bias becomes strong.

The fourth control method will be described with reference to the flowcharts shown in FIGS. First, in the flowchart of FIG. 7, after water is supplied in the washing process (steps 501 and 50).
2) In the first long time period of the repetition of the forward / reverse rotation cycle of the long time period and the forward / reverse rotation cycle of the short time period, the rotation amount Rm is detected each time the forward / reverse rotation is repeated (step 5).
03,504). For example, in the case of a long time period of 1.5 seconds rotation and 1.0 seconds stop, rotation is performed at a certain torque input, and inertia rotation is performed for 1.5 seconds as a rotation time and 1.0 seconds as a stop time. The total rotation amount is defined as the m-th rotation amount. Then, the smaller the cloth is, the more the cloth floats on the water by buoyancy and the probability of directly acting as a load on the pulsator is reduced, so that the rotation amount Rm increases. Therefore, it can be determined that the amount of cloth is smaller than the predetermined bath ratio (weight of water in the washing tub / weight of cloth). In order to further increase the accuracy, the total rotation amount over a long time duration of 2 minutes is integrated (steps 503 to 507), and the integrated rotation amount R is equal to a predetermined threshold Rf.
In this case, it is determined that the cloth is floating (step 508).
Yes). On the other hand, in the case where there is cloth floating, the rotation amount is larger than in the case where there is no cloth floating, so that rotation of a predetermined rotation or more is given. This causes unevenness of the cloth.
Therefore, as shown in the flowchart of FIG. 8, in the short time period (step 601), when it is determined that the cloth is floating (Yes in step 602), the motor rotation speed is reduced (step 603), and the predetermined rotation amount is set. Is controlled so that

The fifth control method will be described with reference to the flowchart of FIG. In the long time period, the bias of the cloth is detected by the method described in the flowchart of FIG. 3 (step 70).
1-703). Further, the cloth floating is detected by the method described in the flowchart of FIG. As described above, if there is a cloth floating, there is a possibility that a predetermined excessive rotation may be given. Therefore, if there is a cloth floating (Ye in step 704).
s) Correction is made so that the short time period is increased from the initial setting time of 1 minute to 1.5 minutes and the ratio is increased, and the long time period is reduced from the initial setting time of 2 minutes to 1.5 minutes and the ratio is reduced (step 70).
6). On the other hand, when there is no cloth floating (No in Step 704), by performing the same control as in the third control method (FIG. 6) (Steps 705 to 707), it is possible to perform control with less cloth unevenness. it can.

[0020]

As described above, according to the first aspect of the invention, the rotation state detecting means detects the rotation state of the pulsator at each stirring, and based on the detection result, continues the short time period. Because it is configured to determine either the time or the ratio of the duration of the short time period to the duration of the long time period, the unevenness of the cloth can be suppressed, and the cleaning effect can be improved without unevenness of the cloth. At the time of spin-drying, vibration and noise caused by uneven cloth can be reduced.

According to the second aspect of the present invention, the rotation state of the pulsator is detected at the beginning of the washing or rinsing process, and the short-time rotation speed is determined based on the detection result. Even when the bath ratio is such that the cloth floats, the cloth unevenness can be suppressed, the washing effect can be improved without uneven washing, and the vibration and noise caused by the cloth unevenness during dewatering can be reduced. .

According to the third aspect of the invention, the rotation state of the pulsator is detected at an early stage of the washing or rinsing process, and the duration of the short time period or the duration of the long time period is determined based on the detection result. Since the correction is made to any of the ratios of the duration of the short time period to the above, this can be eliminated before the unevenness of the cloth becomes strong, and the washing effect can be improved without uneven washing. At the same time, it is possible to reduce vibrations and noises caused by unevenness of the cloth during dewatering.

According to the fourth aspect of the present invention, the rotation state of the pulsator is detected during the short time period operation,
Since the end time of the short time period is determined based on the detection result, it is possible to resolve the problem early without increasing the unevenness of the cloth. And the vibration and noise caused by the uneven cloth during dewatering can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a cross section of an embodiment of a fully automatic washing machine according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of a control system according to the embodiment.

FIG. 3 is a flowchart illustrating a method for detecting a bias in the embodiment.

FIG. 4 is a flowchart for explaining a first control method in the embodiment.

FIG. 5 is a flowchart for explaining a second control method in the embodiment.

FIG. 6 is a flowchart illustrating a third control method in the embodiment.

FIG. 7 is a flowchart for explaining a fourth control method in the embodiment.

FIG. 8 is another flowchart for explaining a fourth control method in the embodiment.

FIG. 9 is a flowchart illustrating a fifth control method in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing tub 2 Pulsator 3 Motor 9 Rotation state detecting means

Claims (4)

[Claims] 1. A rotating state detecting means for detecting a rotating state of a pulsator, wherein a long-time forward / reverse rotation cycle and a short-time forward / reverse rotation cycle are alternately performed in a process of washing or rinsing by stirring the pulsator. In a fully automatic washing machine, the rotation state detecting means detects the rotation state of the pulsator at each stirring, and based on the detection result, the duration of the short time period or the duration of the long time period A fully automatic washing machine configured to determine any one of the ratios of the short time duration. 2. The apparatus according to claim 1, wherein a rotation state of the pulsator is detected at an early stage of a washing or rinsing process, and the rotation number in the short time period is determined based on the detection result. 1. The fully automatic washing machine according to 1. 3. The state of rotation of the pulsator is detected at the beginning of a washing or rinsing process, and the duration of the short time period or the duration of the short time period with respect to the duration of the long time period is determined based on the detection result. 2. The fully automatic washing machine according to claim 1, wherein a correction is made to one of the ratios. 4. The method according to claim 1, wherein the detection of the rotation state of the pulsator is performed during the short time period operation, and the end time of the short time period is determined based on the detection result. The fully automatic washing machine according to claim 1, wherein