JPH07299279A - Operation controller for fully automatic washing machine - Google Patents

Abstract

PURPOSE:To correct the cloth clustered on one side at the time of washing and rinsing and to reduce the abnormal vibration and noise at the time of dewatering, by changing the positive-negative inversion rotation time of a stirring blade corresponding to the cloth to be washed based on the information of the cloth sensor. CONSTITUTION:In the fully automatic washing machine performing washing, rinsing, and dehydration, a stirring blade 7 is subjected to positive-negative inversion rotation just after the end of washing or rinsing. The clothes clustered on one side at the time of washing or rinsing is corrected and then the next process of drainage and dewatering is performed. In this case, the stirring blade 7 is subjected to positive- negative inversion rotation at the time of washing water level supplied according to the amount of cloth at the sensing water level and the cloth is judged by the difference of the sensing pulse from the cloth amount sensor. Based on the judged cloth and the sensing information of a microcomputer, a motor 20 is subjected to positive- negative inversion rotation by a control part 19. The stirring blade 7 is rotated through a V belt 16. Thus, the stirring time of correcting the clothes clustered on one side is controlled just before washing or rinsing and the clustered cloth can be properly corrected.

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,
In particular, the present invention relates to operation control for preventing unevenness of clothes generated during washing and rinsing.

[0002]

2. Description of the Related Art In a conventional fully automatic washing machine, a method of preventing cloth deviating during washing and rinsing is a time period shorter than the stirring time of a stirring blade during washing and rinsing regardless of the quality of the laundry. It was stirred for several seconds to prevent the cloth from slipping. However, in the conventional method, even when the amount of laundry clothes is small or at the rated capacity, the agitating blades are reversed in the same agitation time period to prevent the cloth from being biased. Even if the cloth's offset can be corrected well at the rated capacity of the clothes, if the washing capacity is small, the water flow due to the reversal of the stirring blade is too strong and the cloth's offset cannot be corrected well. was there. Further, if the agitating blades are normally and reversely reversed in time for a small washing capacity, there is a drawback in that the deviation of the cloth cannot be corrected when the rated capacity is washed.

Further, as a control means for eliminating the above-mentioned drawbacks, after washing or rinsing, in the draining process, water for washing or rinsing is drained while stirring is performed at a forward and reverse reversal time period for preventing cloth piece deviation. However, the laundry clothes that were deviated to one side were corrected, but this was also the same as the above description, and the stirring blade was rotated at the fixed forward / reverse inversion time, so that a good effect could not be expected.

[0004]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a control method for correcting the unevenness of the cloth generated during washing or rinsing regardless of the amount of laundry and the quality of the laundry. Especially.

[0005]

As a means to be solved by the present invention, a cloth piece corresponding to the quality of the cloth to be washed is provided with a cloth quantity sensor for detecting the quantity of cloth and a cloth quality sensor for detecting the quality of cloth. The stirring time is set to correct the deviation.

[0006]

According to the present invention, in order to solve the above-mentioned drawbacks of the prior art, washing is performed based on the information of the cloth amount sensor and the cloth quality sensor according to the quantity and quality of cloth to be washed, or immediately before the end of rinsing. In order to correct the unevenness of clothes and shift to the dehydration process, the forward and reverse reversal time periods of the stirring blades are made different.

That is, the forward / reverse reversal time of the stirring blade is made different when the amount of laundry is large and when the amount of laundry is large, or the quality of the cloth, for example, the normality of the stirring blade depending on the case of chemicals and cotton. Different reverse reversal time limit.

[0008]

The present invention will be described with reference to the drawings. Figure 1
FIG. 3 is a vertical sectional view of a fully automatic washing machine adopting the present invention.
The fully automatic washing machine has four hanging bars 5 inside the outer frame 1,
The outer tank 2 has corner plates 2 at the four corners of the outer frame 1.
Supported by 1. The hanging bar 5 can be
A push spring 4 that absorbs vibration is interposed. In the case of washing, the lid 18 is opened, the clothes are put into the washing tub 3, and the water is supplied in accordance with the command from the control unit 19, and then the motor 20 is rotated in the forward and reverse directions. The rotation of the motor 20 is transmitted from the motor pulley 17 to the clutch pulley 15 in the clutch 14 via the V belt 16. The transmitted rotation is the clutch 1
At the time of washing by the operation of 4, the stirring blade 7 for moving the clothes located in the center of the washing tub 3 is rotated to wash.

During drainage, the motor 2 is instructed by the controller 19
0 is stopped, the drain valve 12 is opened, and the washing or rinsing liquid in the washing tub 3 is discharged from the drain hose 13 to the outside of the machine. After the drainage, the dehydration process automatically proceeds, but the dehydration process causes the outer tub 2 to shake greatly depending on the condition of the clothes. Therefore, in order to prevent the outer tub 2 from swinging, the balancer 6 is placed on the upper part of the washing tub 3.
Is provided to prevent the outer tank from swinging due to dehydration.

For dehydration, the rotation of the motor 20 is transmitted to the clutch 14 via the V-belt 16 as in the case of washing, and the washing tub 3 is rotated at a high speed by the control of the clutch 14 and the centrifugal force is applied to the clothes. The water inside is dehydrated to the outer tub 2 through the dehydration hole 3a provided in the washing machine 3. The dehydrated washing water is drained to the outside of the machine from the drain valve 12 and the drain hose 13.

FIG. 2 is a detailed explanatory diagram of the control unit 19 described in FIG. The microcomputer 34 includes a timer 33 and a CPU
(Central processing unit) 32, memory 31, and I / O ports 29, 30. These microcomputer 34
In the process of (3), the CPU 32, the timer 33, and the memory 31 are exchanged and controlled by a data bus. Basically, these operation controls are, as is well known,
Timer 33, CPU 32, memory 31, input port 29,
It is composed of the output port 30, and the control command at the time of washing is issued by the CPU 32. The CPU has an arithmetic unit and a control unit, which is the center of the system. The CPU basically fetches, decodes, and executes instructions, but specifically, arithmetic and logical operations, read and write control of the contents of specified addresses in memory, and input / output to specified addresses in input / output devices. It controls output and program flow.

The memory 31 stores programs and data, and has both read and write functions.
And a ROM that has only a read function. The RAM is used as a work area for storing data and forming programs, and the ROM is used for storing fixed programs and fixed data and is always the same. It is used when processing.

The input port 29 and the output port 30 are CP
It is a circuit that acts as an intermediary when data is transferred between the U and the input device and the output device, and is generally called an I / O port.

An electric command from the fully automatic washing machine is input to the input side of the I / O port. This is mainly the power switch 23, the water level sensor 22, the lid switch 24, the program selection switch 25, the start / stop switch 2.
6, the cloth amount sensor 35 and the like are connected. Further, the washing motor 20, the water supply valve 10, the drain valve 12, the clutch solenoid 27, the alarm 28, the progress indicator 36 of the display panel section, and the like are connected to the output side, and the I / O is operated by a command from the CPU.
The washing machine is controlled by the intervention of the O port to perform a series of washing operations. Therefore, the washing machine is controlled in the same manner as the mechanical control including the cam switch.

The control of the fully automatic washing machine by the microcomputer control has been described above with reference to FIG. 2. The operation by the microcomputer control will be described more specifically based on the process block diagram of FIG. The washing machine pushes the power switch 23,
For example, a standard laundry course is selected by the program selection switch 25, and the start / stop switch 26 is pressed to supply water into the washing tub 3 from the water supply hose 11 via the water supply valve 10. Based on the information from the water level sensor 22, the CPU 32 determines that the specified amount of washing water has entered the washing tub 3, and starts the specified washing operation. After the washing operation is completed for a specified time, the drain valve 12 drains the drain hose 13 to the outside of the machine. After that, the water in the clothes is dehydrated by centrifugal force through the dehydration hole 3a, and then water for rinsing is supplied to perform rinsing. Such a series of washing operations is carried out by the microcomputer for washing.

Next, the principle of the cloth amount sensor for measuring the amount of cloth to be washed will be described with reference to FIG.

As for the amount of cloth, the motor 20 is operated by putting an appropriate laundry clothes into the washing tub 3, pressing the power switch 23, and pressing the start / stop switch 26. When the motor 20 is operated, a signal is alternately sent to the gates of the triacs 36a and 36b in response to a command from the microcomputer 34, so that the motor 20 rotates forward and backward.

From the forward / reverse rotation of the motor 20, the stirring blade 7 located in the central portion of the washing tub 3 is moved forward / backward by the rotation transmission method described with reference to FIG.
The resistance applied to the stirring blade 7 changes depending on whether the amount of laundry clothes is large or small, and the degree of this change is detected by the counter electromotive force of the condenser 39.

The series of changes will be described with reference to FIG. In FIG. 4, when the motor 20 outputs an off command signal to the triac 36a in response to a command from the microcomputer 34, the triac 36a shown in FIG. 4 becomes like the triac off signal 39a in FIG. The inter-terminal voltage of the signal is attenuated from the triac-off signal 39a of FIG. 5 as indicated by 40a. The attenuation voltage of the capacitor 40a is converted into a rectangular wave 41 by the photo / triac coupler 37, the rectangular wave 45 is inverted by the inverter 38, and the signal is sent to the microcomputer 34. The exchange of these information with the microcomputer is shown in FIG. This is performed by the cloth amount sensor 35 shown. The signal which has a rectangular wave in the photo / triac coupler 37 and the inverter 40 in FIG. 4 enters a state similar to the sensing pulse 41 in FIG.
Processed within 32. Here, to determine whether the amount of cloth is large or small, Δt of the rectangular wave (sensing pulse) 41 shown in FIG. 5 changes due to the resistance of the cloth applied to the stirring blade 7 by the forward and reverse rotations of the motor 20. To measure. When the experimental result of this change amount is described based on FIG. 6, it can be seen that Δt of the sensing pulse 41 becomes longer in proportion to the load amount. Utilizing this state, when the sensing pulse 45 is taken into the microcomputer 34, the microcomputer 34 measures Δtmsec of the sensing pulse 41, and determines that the amount of laundry clothes is small depending on the length of Δtmsec. do. In accordance with this determination, the microcomputer 34 selects and determines the washing water level as either a low water level, a medium water level, a high water level, or the like, and supplies water from the water supply valve 10 into the washing tub 3.

The amount of water supplied is preset to the microcomputer 34.
Then, the water level corresponding to the amount of cloth is supplied.
The water level sensor 22 detects the water level set in 4.

As shown in FIG. 2, the microcomputer 34 continuously monitors whether or not the water level determined by the amount of cloth has been reached by the water level sensor 22 while supplying water from the water supply valve 10, and the signal from the water level sensor 22 is transmitted. If the conditions are the same as those determined by the microcomputer 34, the water supply valve 10 is stopped and the process proceeds to the washing process to wash.

Next, a method of detecting the quality of cloth will be described. First, the contents controlled by the amount of cloth and the contents controlled by the quality of the cloth will be described. To set the washing condition by the amount of cloth, the washing water level (water amount) mainly matching the amount of cloth is determined. . In addition, the washing condition is mainly determined by the washing quality, the washing time, the reversal time of the stirring blade 7, that is, the washing water flow. The method of detecting the quality of cloth is basically
This is the same as the method of sensing the amount of cloth described above. However, instead of sensing the amount of cloth by inserting laundry clothes and pressing the start / stop key, the amount of cloth should be sensed at the predetermined low water level, medium water level, and high water level required for washing. , Generally lower than a predetermined low water level (commonly called sensing water level)
After the water is supplied, the stirring blade 7 is normally and reversely reversed by a command of the microcomputer, and the method for sensing the amount of cloth is performed to determine the water level corresponding to the amount of cloth, for example, low water level, medium water level or high water level. After the decision, water will be supplied up to the decided water level. Whether or not the water supply is completed is controlled by the information from the water level sensor 22, but after the information matches the set value of the microcomputer, the information is detected again by the same control method as the cloth amount sensing described above, and the information is detected. It is taken into the microcomputer via the cloth amount sensor 35.

The method of judging the quality of the cloth is to reverse the stirring blade 7 at the sensing water level and to reverse the sensing pulse Δ at that time.
tmsec and then water is supplied, and the same agitation control as the cloth amount sensing is performed at the wash water level (for example, high water level) according to the cloth amount, and the quality of the cloth is judged by the difference of the sensing pulse Δt2msec at that time. Is a general control method.

Thus, the difference between Δtmsec in sensing the amount of cloth and sensing Δt2msec at the specified wash water level gives
The quality of the cloth is judged. For example, in the case of chemicals, since the water content is relatively small, the resistance received by the stirring blade 7 is small, and the value of Δtmsec in the cloth amount sensing becomes a small value.

Further, when water is supplied to the washing water level determined by the value of the cloth amount sensing and the sensing is carried out again, the resistance applied to the stirring blade 7 is small in the case of the chemical amount like Δt2msec as in the case of the cloth amount sensing. The value of is small.
Since the judgment of cloth quality is made by the difference between the sensing pulse value of Δtmsec and Δt2msec, if this difference is smaller than a certain specified value, it is judged as chemical clothes and the washing time and washing water flow are determined. The microcomputer sets the conditions suitable for the washing of the chemical and wash it.

Also, since cotton has a relatively high water content,
The difference between △ tmsec at the time of cloth amount sensing and △ t2msec at the specified water level required for washing is larger than that for chemicals, so this difference is judged as cotton laundry, and the washing time and washing water flow are determined. Decide and wash.

Although the above description of simple cloth quality control has been made, by sensing with these methods, it is possible to make a similar judgment for a blended product of synthetic cotton and cotton, and to automatically wash clothes suitable for laundry. You can set conditions such as water level, washing time, and washing water flow.

Next, examples of the present invention will be described.

Before explaining the embodiment of the present invention, the deviation correction control of the laundry clothes at the time of washing and stirring during rinsing will be described. When washing or rinsing, the laundry clothes are reversed in the washing time by the stirring blade 7 in the washing tub 3 based on the sensing information of the cloth quality described above, and the clothes are washed with a washing water flow suitable for the quality of the cloth. Move and wash. However, the laundry moves in the washing tub 3 while the upper and lower sides are swapped by the movement of the stirring blades 7, and sometimes the clothes are in a state of being biased in the washing tub 3.

When the washing is completed in this biased state and the next step of draining and dewatering is proceeded, the washing tub 3 is rotated at a high speed by the above-mentioned drive during dewatering, so that the outer tub 2 is greatly shaken and vibrated. And noise will be generated. Moreover, the phenomenon of abnormal vibration that the main body of the washing machine starts to move during dehydration occurs, and a situation occurs in which the fully automatic course from washing to rinsing to dehydration cannot be completely completed. As countermeasures against these problems, the vibration-proof mechanism has been improved, but the basic control method is to prevent the laundry from shifting to the dehydration process with the laundry already biased in the washing tub 3, Currently, immediately before the end of washing or rinsing, a forward / reverse reversing water flow shorter than the water flow in forward / reverse reversing at the time of washing is performed for a few seconds, and the stirring blade 7 is normally / reversely reversed in a short cycle, so that it can be washed and rinsed. Generally, control is performed to correct the deviation of the generated cloth and shift to the dehydration step.

However, the agitator blade 7 by this cloth piece deviation correction
Since the forward and reverse reversal of is performed at a constant cycle regardless of the amount of cloth and the quality of cloth, it depends on whether the amount of cloth is large or small, or whether the cloth quality is chemical or cotton. , The correction was incomplete, and abnormal vibration occurred during dehydration.

According to the present invention, the forward / reverse inversion cycle of the stirring blade 7 performed immediately before the end of washing or rinsing is changed based on the cloth quality sensing information described above.

The control method will be described with reference to the control diagram of FIG. In the cloth shift correction control chart of FIG. 7, the cloth shift correction agitation according to each cloth quality is performed based on the sensing information of the cloth quality of the laundry clothes described above.

First, the quality of the cloth to be washed is judged 42, and the piece of cloth to be washed or immediately before the rinsing is finished depending on whether the clothes to be washed are the chemical substance 43, the cotton substance 44, or the mixture of the chemical substance and the cotton substance 44. Change the agitating time limit of the correction.

In the case of the chemical substance 43, the correction of the cloth piece deviation is performed with stirring 45. For the cotton substance 44, with stirring 46, in the case of mixing the chemical substance with cotton, the mixture is stirred for 47 seconds with stirring 47 for washing or At the time of rinsing, the condition in which the clothes are biased in the washing tub 3 is uniformly corrected, and then drainage 49 and dehydration 50 are performed.

As described above, by correcting the deviation of the cloth according to the quality of the laundry clothes, the correction can be appropriately performed, and the vibration and noise can be minimized. Further, these modified stirrings are driven for several seconds in a stirring cycle of stirring 45 <stirring 47 <stirring 46 because of the water content of the clothes.

FIG. 8 is an application diagram based on the cloth and modified stirring block diagram shown in FIG.

As explained in the block diagram of FIG. 7, when washing or rinsing is performed depending on the quality of the cloth, the deviation in the washing tub 3 is corrected, and the process proceeds to the drainage / dewatering process. In the case of the control that is largely offset and cannot be completely corrected by the correction explained in the block diagram of FIG. 7, the effect of the correction can be further achieved by the control shown in FIG.

The control block of FIG. 8 will be described in more detail. Depending on the material 42, the chemical substance 43 or cotton 44 is used.
In other words, the cloth 45 is mixed and corrected by mixing 45 of cotton and cotton in two stages, and the stirring cycle according to the quality of each cloth is divided and stirred in a stirring time of several seconds. In the case of the chemical compound 43, the correction stirring 48 and the stirring 46 that are closer to the cloth piece are performed within a few seconds within the stirring time. At this time, the agitation 46 is a short cycle for chemicals as described in FIG. 7, and the agitation 48 is a short cycle for mixed clothing of chemicals and cotton. When washing the chemicals 43 in FIG. 8, the stirring 48 and the stirring 46 are combined and controlled in two stages. The effect is that the large deviation of the clothes at the time of washing or rinsing is stirred 46. By slightly stirring with agitation 48, which is a short-cycle agitation, after correcting the strongly biased clothes, by further stirring with agitation 46, the unevenness of the laundry clothes is well corrected and the clothes are washed in the washing tub 3. It is made uniform and the process moves to the drainage and dehydration processes. The similar control is performed for the correction agitation that is closer to the cloth piece due to the other cloth qualities in FIG. 8.

As described above, the control method of the present invention described in FIGS. 7 and 8 cites the embodiment just before the end of washing and rinsing. However, the washing time becomes as long as 10 minutes to 20 minutes depending on the quality of the cloth. Therefore, in particular, when washing is performed for a washing time of 20 minutes, a phenomenon may occur in which the cloth is entangled in the middle of washing and is greatly offset in the washing tub 3. In such a case, uneven washing occurs and the stains on the clothes cannot be removed well. Therefore, if the control explained with reference to FIG. 7 and FIG. 8 is performed during the washing, the entanglement of the clothes is loosened. Since the clothes are made uniform in the washing tub 3 and the laundry is stirred for the rest of the washing time, the washing power is improved.

[0041]

According to the present invention, (1) vibration and noise during dehydration can be reduced.

(2) It is possible to prevent abnormal vibrations in which the main body moves during dehydration.

(3) By adopting it even during washing, uneven washing can be suppressed and washing power is improved.

(4) Since it is a short-cycle correction agitation that is suitable for laundry clothes, it can prevent damage to the cloth.

[Brief description of drawings]

FIG. 1 is a sectional view of a fully automatic washing machine.

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

FIG. 3 is a block diagram of a fully automatic standard course of a fully automatic washing machine.

FIG. 4 is a cloth amount sensing circuit diagram.

FIG. 5 is a cloth amount sensing pulse diagram.

FIG. 6 is an explanatory diagram of an experimental result of a laundry load amount and a pulse time.

FIG. 7 is a block diagram of a cloth piece deviation correction according to the quality of cloth.

FIG. 8 is a block diagram of a two-stage cloth shift correction according to the quality of cloth.

[Explanation of symbols]

2 ... outer tub, 3 ... washing tub, 7 ... stirring blade, 22 ... water level sensor, 35 ... cloth amount sensor.

Claims (2)

[Claims] 1. Washing in a fully automatic washing machine with a fully automatic course from washing to rinsing and dehydration, or immediately after rinsing or rinsing or inverting, with a time period shorter than the stirring time period of rinsing In addition, in the control method that corrects unevenness of clothes during rinsing and shifts to the next step, drainage and dehydration, the cloth quality detection sensor responds to the quality of the cloth based on the quality information of the cloth to be washed An operation control device for a fully automatic washing machine, which is characterized by different forward and reverse reversals. 2. The forward / reverse reversal control of the stirring blade according to claim 1, wherein two or more kinds of forward / reverse reversal stirring times of the stirring blade are provided, and different forward / reverse reversals of different stirring time periods are performed depending on the quality of the cloth. Combined fully automatic washing machine operation control device.