JPH04253899A - Control device for full automatic washing machine - Google Patents

Abstract

PURPOSE:To control an agitating wing so as not to revolve in one direction at a time of step switching during washing. CONSTITUTION:A rotational direction of an agitating wing commanded by a microcomputer is stored in a memory at a time of automatical step switching or forced step switching by an external input key. After a step starts, the agitating wing is controlled to start revolving after a stop in a reverse direction to that of the former step.

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, and more particularly to rotational control of a stirring blade in a fully automatic washing machine.

0002

[Prior Art] Conventionally, the washing method in a fully automatic washing machine is to rotate the stirring blades clockwise and counterclockwise under specified conditions for a specified time period to move the clothes and wash them. . However, in order to improve the cleaning effect and the performance of preventing fabric damage and tangles during the washing process, the washing agitation blade rotation time period is automatically changed to improve washing performance. . However, when changing the step in which the rotation time of the stirring blade changes during washing, due to the relationship between the washing time and the stirring time when the stirring blade is rotated, after the stirring is completed by rotating clockwise, the step moves to the stirring time of the next step. When migrating,
Similarly, there are cases where stirring starts from clockwise rotation, and a situation occurs in which the stirring blades rotate continuously in the same direction.
Washing performance may deteriorate due to tangled or damaged fabrics, uneven washing may occur during washing, or the rotary blades may rotate continuously in the same direction, causing the clothes to be washed to rotate violently and the washing water to become rippled. There was a drawback that overflow occurred.

0003

[Problems to be Solved by the Invention] The present invention eliminates the drawbacks of the prior art and provides a washing machine that has optimal washing performance. , The left side rotates several times, the rotation time period changes during washing, and when moving to the next step and starting stirring under new conditions, the rotation direction of the stirring blade is the same as the conditions of the previous step. The rotating direction in is such that stirring is always started in the opposite direction after a pause of several seconds. Also, if the step is changed using an external switch while the stirring blade is rotating,
Similarly, after stopping the rotation of the stirring blade for several seconds, stirring is started in the opposite direction to the rotation direction before the step change.

0004

[Means for Solving the Problems] In order to eliminate the drawbacks of the prior art, the present invention allows the microcomputer to always store the current setting conditions, so that the stirring blade can be rotated in which direction and at what time. When the step is changed automatically by determining whether the stirring blade is rotated or when the step is changed by inputting an external key, the stirring blade is rotated in the opposite direction to the direction in which it was rotated after a pause.

[0005]

[Operation] Based on the instructions from the microcomputer, the washing motor is driven forward and backward from the I/O port, a clutch is interposed in the stirring blade that moves the clothes, and the rotation is transmitted to the stirring blade to wash the clothes. Always remember whether the command is issued based on the conditions, especially whether the motor rotates forward or reverse, and when changing the washing conditions or step, change the rotation direction in which the agitating blades were rotating after a pause. By starting the rotation from the direction of
This prevents continuous rotation of the stirring blades in the same direction, improving washing performance and preventing water overflow during washing.

[0006]

[Example] The present invention will be explained with reference to the drawings. Figure 1 shows
1 is a vertical cross-sectional view of a fully automatic washing machine that employs the present invention, and to explain the operation sequentially, the fully automatic washing machine has a
The outer tank 2 is supported by four hanging rods 5 from corner plates 21 at the four upper corners of the outer frame 1. A spring 4 is interposed on the hanging rod 5 to absorb vibrations during washing and dehydration. When washing, open the lid 18 and place the clothes in the washing tub 3.
After water is supplied, the motor 2 is
Rotate 0 forward and backward. The rotation of the motor 20 is caused by the V-belt 1.
6, the rotation is transmitted from the motor pulley 17 to the clutch pulley 15 in the clutch 14. The transmitted rotation is caused by the clutch 14 to rotate the stirring blade 7 that moves the clothes located in the center of the washing tub 3 during washing. When draining water, the motor 17 is activated by the command from the control unit 19.
is stopped, the drain valve 12 is opened, and the washing liquid in the washing tub 3 is discharged to the outside of the machine through the drain hose 13. After draining, the process proceeds to the spin-drying process, but the outer tub 2 shakes a lot during spin-drying depending on the condition of the clothes.To prevent shaking, a balancer 6 is installed on the top of the washing tub 3 to prevent the outer tub from shaking during spin-drying. This prevents vibration. Dehydration is done by motor 1
7 is transmitted to the clutch 14 via the V-belt 16 in the same way as during washing, the clutch 14 rotates the washing tub 3 at high speed, and the centrifugal force drains the moisture in the clothes to the outer tub 2. The dehydrated laundry water is drained through the drain valve 12.
The water is then drained out of the machine via the drain hose 13. FIG. 2 is a detailed explanatory diagram of the control section 19 described in FIG. 1. An electronic control circuit consisting of a timer, a CPU (central processing unit), and a memory I/O port is designed to sequentially move from washing to spin-drying, similar to the case with a timer consisting of a timer motor and a cam switch. Since this is well known, the following embodiments will be explained using block diagrams. The electronic control circuit 35 shown in FIG. 2 is for automatically transitioning from the detergent washing process to the final dehydration process, and basically includes a timer 38, a central processing unit (CPU), etc. )36,
It consists of a memory 37, an input port 23, and an output port 24, and control commands during washing are sent to a central processing unit (CP).
The central processing unit (CPU) has an arithmetic unit and a control unit and is the center of the system. Basically, it involves retrieving, decoding, and executing instructions, but specifically includes arithmetic and logical operations, control of reading and writing of contents at specified addresses in memory, control of input/output to specified addresses of input/output devices, It controls the flow of the program.

The memory 37 stores programs and data, and there are two types of memory: RAM, which has both read and write functions, and ROM, which has only read function. RAM
is used as a work area for storing data and creating programs, while ROM is used to store fixed programs and fixed data and perform the same processing at any time. The input port 23 and the output port 24 are circuits that mediate data exchange between the CPU, input device, and output device, and are generally called I/O ports. Electrical commands from the fully automatic washing machine are input to the input side of the I/O port, and are mainly used to control the power switch 25.
, a water level sensor 26, a lid switch 27, a program selection switch 28, and a start/stop switch 29 are connected. Furthermore, a washing motor 30, a water supply valve 31, a drain valve 32, a clutch solenoid 33, an alarm, etc. are connected to the output side, and are controlled by instructions from the CPU through the I/O port, and a series of washing It is something that moves. Therefore, the washing machine is controlled in the same way as a washing machine with a timer, which is controlled by a timer consisting of a timer motor and a cam switch. It is controlled by the electronic circuit as described above.

The parts of the washing machine according to the present invention will be explained in detail. FIG. 3 is a time chart showing the time limit, direction, etc. in which the washing stirring blade 7 rotates in the clockwise rotation direction and the counterclockwise rotation direction. During the washing time T minutes, the stirring blade 7 first moves t to the left.
It rotates for 1 second, after completing the rotation for t1 seconds, there is a pause for t2 seconds, and then it rotates in the right direction for the same time as in the left direction for t1 seconds, and then pauses for t2 seconds, and by repeating this cycle, the clothes are moved. After the washing period T minutes have ended, the cycle shifts to the draining process. FIG. 4 is an explanatory diagram of the prior art. Conventionally, the stirring cycle of the stirring blades 7 was changed during washing in order to improve the washing performance during the washing time T minutes. Step 1 is to rotate left,
By increasing the stirring time t1 during clockwise rotation and shortening t2 during rest, the stirring blade 7 can be rotated for a long period of time, thereby improving mechanical power and moving the clothes with a powerful water stream for washing. However, step 1 requires washing time T
If you do this for a long time, the increase in mechanical force will cause the cloth to become tangled.
In order to avoid damage to the fabric and significantly reduce washing performance, an agitation time limit for step 2 is provided within the washing time T minutes. The stirring time in step 2 is as follows:
The time limit t3 is shorter than the stirring time limit in step 1. Similarly, if the agitation time limit is short, a long pause t4 is used to weaken the mechanical force of the agitation blades 7 during washing, thereby controlling the washing process to prevent cloth entanglement, fabric damage, etc. ing. However, the command from the microcomputer's CPU is that the rotation of the stirring blade 2 at the start of washing should start from the left, so that Step 1 finishes rotating in the counterclockwise direction within T minutes of washing. When moving to step 2, the microcomputer command is a rotation command from the left direction, so the stirring time in the rotation is t1 in step 1 and t3 in step 2.
is added, the stirring blade rotates in the counterclockwise rotation direction for t1+t3 seconds, and the rotation time of the stirring blade becomes longer than the specified time, causing fabric tangles and fabric damage, as well as the rotation time of the stirring blade 7. Because the length of the washing machine becomes longer, a large whirlpool is generated during washing, resulting in a problem of water overflowing from the outer washing tub 4 to the outside of the washing machine. FIG. 5 is a time chart of control that eliminates the drawbacks of the prior art that occur during step switching. When transitioning from step 1 to step 2 within a certain washing time T minutes, the CPU 36
The memory 37 always memorizes whether the command from the rotation direction is clockwise or counterclockwise, and when step 1 is completed, the rotation is counterclockwise.
When the rotation of the agitation blade 7 is completed, there is a pause and then the process moves to step 2, in which the washing agitation in step 2 is started by rotating the agitation from the clockwise rotation direction. These controls are such that when step 1 is completed with clockwise rotation, there is a pause and the stirring rotation is performed from the left rotation direction, which is opposite to the clockwise rotation direction. By controlling in this way, it is possible to prevent the stirring blade 7 from continuously rotating in the same direction, thereby preventing cloth damage and cloth entanglement. Since the washing machine does not rotate, large swirls do not occur during washing, and washing water does not overflow to the outside of the machine. FIG. 6 is a time chart diagram when the step is changed by an external input key while the stirring blade 7 is rotating clockwise or counterclockwise during step 1 stirring within the washing time T minutes. In this way, when the step is changed using the external input key during washing agitation, the microcomputer erases the conditions of step 1 and issues a new command to start agitation using the new step 2 conditions. When input, if the left direction is specified to the microcomputer, the agitation at the start of washing will start in step 2.
Now, start stirring from the counterclockwise rotation direction. In other words, the control ends at the left in step 1 and starts from the left in step 2, resulting in the same state as shown in Fig. 4, which impedes the function of the washing machine, so the control is performed in the same way as the control shown in Fig. 5. By doing so, it is possible to control the washing operation properly. FIG. 7 is a flowchart diagram of the present invention. After starting washing, whether the steps are automatically changed or the steps are forcibly changed using an external input key, the instructions from the CPU 36 are always stored in the memory 37, and when the steps are changed, the stirring blades 7 are , determines whether the rotation is to the left or the rotation to the right, and if the rotation ends in the left direction and the step is changed, the rotation is started from the right after a pause of several seconds. Furthermore, even when the left direction is not finished (right direction finished), the control content is to pause for several seconds and then start stirring even in the left direction. This is to constantly judge the situation within the washing time T minutes, and proceed to the next step as soon as the washing time T minutes ends.

[0009]

[Effects of the Invention] According to the present invention, no matter what the time period is, such as the washing time T minutes or the washing reversal time t1, the stirring time period does not continue to rotate in the same direction. It is possible to reduce fabric damage and prevent fabric tangling. In addition, since the washing machine does not rotate continuously in the same direction, swirls generated during washing are minimized, which has the effect of preventing water from overflowing during washing.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a fully automatic washing machine.

FIG. 2 is a block diagram of microcomputer control.

FIG. 3 is a time chart diagram of washing agitation time limit.

FIG. 4 is a time chart diagram of washing agitation time limit.

FIG. 5 is a time chart diagram of washing agitation time limit.

FIG. 6 is a time chart diagram of the washing agitation time limit.

FIG. 7 is a control flowchart diagram.

[Explanation of symbols]

3... Washing tub, 7... Stirring blade, 19... Control unit, 20... Washing motor.

Claims (2)

[Claims] Claim 1: In a fully automatic washing machine, the agitating blades that agitate and wash clothes during washing are rotated to the right and to the left in the same time period, or to the right several times and to the left several times. When the rotation time period changes automatically during washing, there is always a pause for a few seconds, and then the rotation starts in the opposite direction to the direction in which it was rotating before the pause. Machine control device. [Claim 2] When the washing process or washing time period is changed by an external switch during washing agitation, the washing agitation blade is paused for several seconds, and the agitation blade is rotated in the opposite direction from before the pause. Fully automatic washing machine control device.